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-rw-r--r--net/atm/Kconfig74
-rw-r--r--net/atm/Makefile16
-rw-r--r--net/atm/addr.c162
-rw-r--r--net/atm/addr.h21
-rw-r--r--net/atm/atm_misc.c102
-rw-r--r--net/atm/atm_sysfs.c185
-rw-r--r--net/atm/br2684.c872
-rw-r--r--net/atm/clip.c929
-rw-r--r--net/atm/common.c895
-rw-r--r--net/atm/common.h56
-rw-r--r--net/atm/ioctl.c365
-rw-r--r--net/atm/lec.c2237
-rw-r--r--net/atm/lec.h155
-rw-r--r--net/atm/lec_arpc.h97
-rw-r--r--net/atm/mpc.c1535
-rw-r--r--net/atm/mpc.h65
-rw-r--r--net/atm/mpoa_caches.c565
-rw-r--r--net/atm/mpoa_caches.h99
-rw-r--r--net/atm/mpoa_proc.c307
-rw-r--r--net/atm/pppoatm.c491
-rw-r--r--net/atm/proc.c400
-rw-r--r--net/atm/protocols.h14
-rw-r--r--net/atm/pvc.c162
-rw-r--r--net/atm/raw.c94
-rw-r--r--net/atm/resources.c419
-rw-r--r--net/atm/resources.h49
-rw-r--r--net/atm/signaling.c244
-rw-r--r--net/atm/signaling.h31
-rw-r--r--net/atm/svc.c696
29 files changed, 11337 insertions, 0 deletions
diff --git a/net/atm/Kconfig b/net/atm/Kconfig
new file mode 100644
index 000000000..77343d57f
--- /dev/null
+++ b/net/atm/Kconfig
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Asynchronous Transfer Mode (ATM)
+#
+
+config ATM
+ tristate "Asynchronous Transfer Mode (ATM)"
+ help
+ ATM is a high-speed networking technology for Local Area Networks
+ and Wide Area Networks. It uses a fixed packet size and is
+ connection oriented, allowing for the negotiation of minimum
+ bandwidth requirements.
+
+ In order to participate in an ATM network, your Linux box needs an
+ ATM networking card. If you have that, say Y here and to the driver
+ of your ATM card below.
+
+ Note that you need a set of user-space programs to actually make use
+ of ATM. See the file <file:Documentation/networking/atm.rst> for
+ further details.
+
+config ATM_CLIP
+ tristate "Classical IP over ATM"
+ depends on ATM && INET
+ help
+ Classical IP over ATM for PVCs and SVCs, supporting InARP and
+ ATMARP. If you want to communication with other IP hosts on your ATM
+ network, you will typically either say Y here or to "LAN Emulation
+ (LANE)" below.
+
+config ATM_CLIP_NO_ICMP
+ bool "Do NOT send ICMP if no neighbour"
+ depends on ATM_CLIP
+ help
+ Normally, an "ICMP host unreachable" message is sent if a neighbour
+ cannot be reached because there is no VC to it in the kernel's
+ ATMARP table. This may cause problems when ATMARP table entries are
+ briefly removed during revalidation. If you say Y here, packets to
+ such neighbours are silently discarded instead.
+
+config ATM_LANE
+ tristate "LAN Emulation (LANE) support"
+ depends on ATM
+ help
+ LAN Emulation emulates services of existing LANs across an ATM
+ network. Besides operating as a normal ATM end station client, Linux
+ LANE client can also act as an proxy client bridging packets between
+ ELAN and Ethernet segments. You need LANE if you want to try MPOA.
+
+config ATM_MPOA
+ tristate "Multi-Protocol Over ATM (MPOA) support"
+ depends on ATM && INET && ATM_LANE!=n
+ help
+ Multi-Protocol Over ATM allows ATM edge devices such as routers,
+ bridges and ATM attached hosts establish direct ATM VCs across
+ subnetwork boundaries. These shortcut connections bypass routers
+ enhancing overall network performance.
+
+config ATM_BR2684
+ tristate "RFC1483/2684 Bridged protocols"
+ depends on ATM && INET
+ help
+ ATM PVCs can carry ethernet PDUs according to RFC2684 (formerly 1483)
+ This device will act like an ethernet from the kernels point of view,
+ with the traffic being carried by ATM PVCs (currently 1 PVC/device).
+ This is sometimes used over DSL lines. If in doubt, say N.
+
+config ATM_BR2684_IPFILTER
+ bool "Per-VC IP filter kludge"
+ depends on ATM_BR2684
+ help
+ This is an experimental mechanism for users who need to terminate a
+ large number of IP-only vcc's. Do not enable this unless you are sure
+ you know what you are doing.
diff --git a/net/atm/Makefile b/net/atm/Makefile
new file mode 100644
index 000000000..bfec0f2d8
--- /dev/null
+++ b/net/atm/Makefile
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the ATM Protocol Families.
+#
+
+atm-y := addr.o pvc.o signaling.o svc.o ioctl.o common.o atm_misc.o raw.o resources.o atm_sysfs.o
+mpoa-objs := mpc.o mpoa_caches.o mpoa_proc.o
+
+obj-$(CONFIG_ATM) += atm.o
+obj-$(CONFIG_ATM_CLIP) += clip.o
+obj-$(CONFIG_ATM_BR2684) += br2684.o
+atm-$(CONFIG_PROC_FS) += proc.o
+
+obj-$(CONFIG_ATM_LANE) += lec.o
+obj-$(CONFIG_ATM_MPOA) += mpoa.o
+obj-$(CONFIG_PPPOATM) += pppoatm.o
diff --git a/net/atm/addr.c b/net/atm/addr.c
new file mode 100644
index 000000000..0530b63f5
--- /dev/null
+++ b/net/atm/addr.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/addr.c - Local ATM address registry */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include "signaling.h"
+#include "addr.h"
+
+static int check_addr(const struct sockaddr_atmsvc *addr)
+{
+ int i;
+
+ if (addr->sas_family != AF_ATMSVC)
+ return -EAFNOSUPPORT;
+ if (!*addr->sas_addr.pub)
+ return *addr->sas_addr.prv ? 0 : -EINVAL;
+ for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
+ if (!addr->sas_addr.pub[i])
+ return 0;
+ return -EINVAL;
+}
+
+static int identical(const struct sockaddr_atmsvc *a, const struct sockaddr_atmsvc *b)
+{
+ if (*a->sas_addr.prv)
+ if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
+ return 0;
+ if (!*a->sas_addr.pub)
+ return !*b->sas_addr.pub;
+ if (!*b->sas_addr.pub)
+ return 0;
+ return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
+}
+
+static void notify_sigd(const struct atm_dev *dev)
+{
+ struct sockaddr_atmpvc pvc;
+
+ pvc.sap_addr.itf = dev->number;
+ sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
+}
+
+void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this, *p;
+ struct list_head *head;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (atype == ATM_ADDR_LECS)
+ head = &dev->lecs;
+ else
+ head = &dev->local;
+ list_for_each_entry_safe(this, p, head, entry) {
+ list_del(&this->entry);
+ kfree(this);
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (head == &dev->local)
+ notify_sigd(dev);
+}
+
+int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
+ enum atm_addr_type_t atype)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ struct list_head *head;
+ int error;
+
+ error = check_addr(addr);
+ if (error)
+ return error;
+ spin_lock_irqsave(&dev->lock, flags);
+ if (atype == ATM_ADDR_LECS)
+ head = &dev->lecs;
+ else
+ head = &dev->local;
+ list_for_each_entry(this, head, entry) {
+ if (identical(&this->addr, addr)) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -EEXIST;
+ }
+ }
+ this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
+ if (!this) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOMEM;
+ }
+ this->addr = *addr;
+ list_add(&this->entry, head);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (head == &dev->local)
+ notify_sigd(dev);
+ return 0;
+}
+
+int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
+ enum atm_addr_type_t atype)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ struct list_head *head;
+ int error;
+
+ error = check_addr(addr);
+ if (error)
+ return error;
+ spin_lock_irqsave(&dev->lock, flags);
+ if (atype == ATM_ADDR_LECS)
+ head = &dev->lecs;
+ else
+ head = &dev->local;
+ list_for_each_entry(this, head, entry) {
+ if (identical(&this->addr, addr)) {
+ list_del(&this->entry);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ kfree(this);
+ if (head == &dev->local)
+ notify_sigd(dev);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOENT;
+}
+
+int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
+ size_t size, enum atm_addr_type_t atype)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ struct list_head *head;
+ int total = 0, error;
+ struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (atype == ATM_ADDR_LECS)
+ head = &dev->lecs;
+ else
+ head = &dev->local;
+ list_for_each_entry(this, head, entry)
+ total += sizeof(struct sockaddr_atmsvc);
+ tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
+ if (!tmp_buf) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOMEM;
+ }
+ list_for_each_entry(this, head, entry)
+ memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
+ spin_unlock_irqrestore(&dev->lock, flags);
+ error = total > size ? -E2BIG : total;
+ if (copy_to_user(buf, tmp_buf, total < size ? total : size))
+ error = -EFAULT;
+ kfree(tmp_buf);
+ return error;
+}
diff --git a/net/atm/addr.h b/net/atm/addr.h
new file mode 100644
index 000000000..da3f84841
--- /dev/null
+++ b/net/atm/addr.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* net/atm/addr.h - Local ATM address registry */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_ADDR_H
+#define NET_ATM_ADDR_H
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+
+void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t type);
+int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
+ enum atm_addr_type_t type);
+int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr,
+ enum atm_addr_type_t type);
+int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user *buf,
+ size_t size, enum atm_addr_type_t type);
+
+#endif
diff --git a/net/atm/atm_misc.c b/net/atm/atm_misc.c
new file mode 100644
index 000000000..a30b83c1c
--- /dev/null
+++ b/net/atm/atm_misc.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/atm_misc.c - Various functions for use by ATM drivers */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL ICA */
+
+#include <linux/module.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/skbuff.h>
+#include <linux/sonet.h>
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/atomic.h>
+
+int atm_charge(struct atm_vcc *vcc, int truesize)
+{
+ atm_force_charge(vcc, truesize);
+ if (atomic_read(&sk_atm(vcc)->sk_rmem_alloc) <= sk_atm(vcc)->sk_rcvbuf)
+ return 1;
+ atm_return(vcc, truesize);
+ atomic_inc(&vcc->stats->rx_drop);
+ return 0;
+}
+EXPORT_SYMBOL(atm_charge);
+
+struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc, int pdu_size,
+ gfp_t gfp_flags)
+{
+ struct sock *sk = sk_atm(vcc);
+ int guess = SKB_TRUESIZE(pdu_size);
+
+ atm_force_charge(vcc, guess);
+ if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
+ struct sk_buff *skb = alloc_skb(pdu_size, gfp_flags);
+
+ if (skb) {
+ atomic_add(skb->truesize-guess,
+ &sk->sk_rmem_alloc);
+ return skb;
+ }
+ }
+ atm_return(vcc, guess);
+ atomic_inc(&vcc->stats->rx_drop);
+ return NULL;
+}
+EXPORT_SYMBOL(atm_alloc_charge);
+
+
+/*
+ * atm_pcr_goal returns the positive PCR if it should be rounded up, the
+ * negative PCR if it should be rounded down, and zero if the maximum available
+ * bandwidth should be used.
+ *
+ * The rules are as follows (* = maximum, - = absent (0), x = value "x",
+ * (x+ = x or next value above x, x- = x or next value below):
+ *
+ * min max pcr result min max pcr result
+ * - - - * (UBR only) x - - x+
+ * - - * * x - * *
+ * - - z z- x - z z-
+ * - * - * x * - x+
+ * - * * * x * * *
+ * - * z z- x * z z-
+ * - y - y- x y - x+
+ * - y * y- x y * y-
+ * - y z z- x y z z-
+ *
+ * All non-error cases can be converted with the following simple set of rules:
+ *
+ * if pcr == z then z-
+ * else if min == x && pcr == - then x+
+ * else if max == y then y-
+ * else *
+ */
+
+int atm_pcr_goal(const struct atm_trafprm *tp)
+{
+ if (tp->pcr && tp->pcr != ATM_MAX_PCR)
+ return -tp->pcr;
+ if (tp->min_pcr && !tp->pcr)
+ return tp->min_pcr;
+ if (tp->max_pcr != ATM_MAX_PCR)
+ return -tp->max_pcr;
+ return 0;
+}
+EXPORT_SYMBOL(atm_pcr_goal);
+
+void sonet_copy_stats(struct k_sonet_stats *from, struct sonet_stats *to)
+{
+#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
+ __SONET_ITEMS
+#undef __HANDLE_ITEM
+}
+EXPORT_SYMBOL(sonet_copy_stats);
+
+void sonet_subtract_stats(struct k_sonet_stats *from, struct sonet_stats *to)
+{
+#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
+ __SONET_ITEMS
+#undef __HANDLE_ITEM
+}
+EXPORT_SYMBOL(sonet_subtract_stats);
diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c
new file mode 100644
index 000000000..466353b3d
--- /dev/null
+++ b/net/atm/atm_sysfs.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0
+/* ATM driver model support. */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/kobject.h>
+#include <linux/atmdev.h>
+#include "common.h"
+#include "resources.h"
+
+#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
+
+static ssize_t type_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
+}
+
+static ssize_t address_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
+}
+
+static ssize_t atmaddress_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long flags;
+ struct atm_dev *adev = to_atm_dev(cdev);
+ struct atm_dev_addr *aaddr;
+ int count = 0;
+
+ spin_lock_irqsave(&adev->lock, flags);
+ list_for_each_entry(aaddr, &adev->local, entry) {
+ count += scnprintf(buf + count, PAGE_SIZE - count,
+ "%1phN.%2phN.%10phN.%6phN.%1phN\n",
+ &aaddr->addr.sas_addr.prv[0],
+ &aaddr->addr.sas_addr.prv[1],
+ &aaddr->addr.sas_addr.prv[3],
+ &aaddr->addr.sas_addr.prv[13],
+ &aaddr->addr.sas_addr.prv[19]);
+ }
+ spin_unlock_irqrestore(&adev->lock, flags);
+
+ return count;
+}
+
+static ssize_t atmindex_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
+}
+
+static ssize_t carrier_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n",
+ adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
+}
+
+static ssize_t link_rate_show(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+ int link_rate;
+
+ /* show the link rate, not the data rate */
+ switch (adev->link_rate) {
+ case ATM_OC3_PCR:
+ link_rate = 155520000;
+ break;
+ case ATM_OC12_PCR:
+ link_rate = 622080000;
+ break;
+ case ATM_25_PCR:
+ link_rate = 25600000;
+ break;
+ default:
+ link_rate = adev->link_rate * 8 * 53;
+ }
+ return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
+}
+
+static DEVICE_ATTR_RO(address);
+static DEVICE_ATTR_RO(atmaddress);
+static DEVICE_ATTR_RO(atmindex);
+static DEVICE_ATTR_RO(carrier);
+static DEVICE_ATTR_RO(type);
+static DEVICE_ATTR_RO(link_rate);
+
+static struct device_attribute *atm_attrs[] = {
+ &dev_attr_atmaddress,
+ &dev_attr_address,
+ &dev_attr_atmindex,
+ &dev_attr_carrier,
+ &dev_attr_type,
+ &dev_attr_link_rate,
+ NULL
+};
+
+
+static int atm_uevent(const struct device *cdev, struct kobj_uevent_env *env)
+{
+ const struct atm_dev *adev;
+
+ if (!cdev)
+ return -ENODEV;
+
+ adev = to_atm_dev(cdev);
+ if (!adev)
+ return -ENODEV;
+
+ if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void atm_release(struct device *cdev)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ kfree(adev);
+}
+
+static struct class atm_class = {
+ .name = "atm",
+ .dev_release = atm_release,
+ .dev_uevent = atm_uevent,
+};
+
+int atm_register_sysfs(struct atm_dev *adev, struct device *parent)
+{
+ struct device *cdev = &adev->class_dev;
+ int i, j, err;
+
+ cdev->class = &atm_class;
+ cdev->parent = parent;
+ dev_set_drvdata(cdev, adev);
+
+ dev_set_name(cdev, "%s%d", adev->type, adev->number);
+ err = device_register(cdev);
+ if (err < 0)
+ return err;
+
+ for (i = 0; atm_attrs[i]; i++) {
+ err = device_create_file(cdev, atm_attrs[i]);
+ if (err)
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ for (j = 0; j < i; j++)
+ device_remove_file(cdev, atm_attrs[j]);
+ device_del(cdev);
+ return err;
+}
+
+void atm_unregister_sysfs(struct atm_dev *adev)
+{
+ struct device *cdev = &adev->class_dev;
+
+ device_del(cdev);
+}
+
+int __init atm_sysfs_init(void)
+{
+ return class_register(&atm_class);
+}
+
+void __exit atm_sysfs_exit(void)
+{
+ class_unregister(&atm_class);
+}
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
new file mode 100644
index 000000000..f666f2f98
--- /dev/null
+++ b/net/atm/br2684.c
@@ -0,0 +1,872 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Ethernet netdevice using ATM AAL5 as underlying carrier
+ * (RFC1483 obsoleted by RFC2684) for Linux
+ *
+ * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
+ * Eric Kinzie, 2006-2007, US Naval Research Laboratory
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/ip.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <net/arp.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/capability.h>
+#include <linux/seq_file.h>
+
+#include <linux/atmbr2684.h>
+
+#include "common.h"
+
+static void skb_debug(const struct sk_buff *skb)
+{
+#ifdef SKB_DEBUG
+#define NUM2PRINT 50
+ print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
+ 16, 1, skb->data, min(NUM2PRINT, skb->len), true);
+#endif
+}
+
+#define BR2684_ETHERTYPE_LEN 2
+#define BR2684_PAD_LEN 2
+
+#define LLC 0xaa, 0xaa, 0x03
+#define SNAP_BRIDGED 0x00, 0x80, 0xc2
+#define SNAP_ROUTED 0x00, 0x00, 0x00
+#define PID_ETHERNET 0x00, 0x07
+#define ETHERTYPE_IPV4 0x08, 0x00
+#define ETHERTYPE_IPV6 0x86, 0xdd
+#define PAD_BRIDGED 0x00, 0x00
+
+static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
+static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
+static const unsigned char llc_oui_pid_pad[] =
+ { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
+static const unsigned char pad[] = { PAD_BRIDGED };
+static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
+static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
+
+enum br2684_encaps {
+ e_vc = BR2684_ENCAPS_VC,
+ e_llc = BR2684_ENCAPS_LLC,
+};
+
+struct br2684_vcc {
+ struct atm_vcc *atmvcc;
+ struct net_device *device;
+ /* keep old push, pop functions for chaining */
+ void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
+ void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
+ void (*old_release_cb)(struct atm_vcc *vcc);
+ struct module *old_owner;
+ enum br2684_encaps encaps;
+ struct list_head brvccs;
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ struct br2684_filter filter;
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ unsigned int copies_needed, copies_failed;
+ atomic_t qspace;
+};
+
+struct br2684_dev {
+ struct net_device *net_dev;
+ struct list_head br2684_devs;
+ int number;
+ struct list_head brvccs; /* one device <=> one vcc (before xmas) */
+ int mac_was_set;
+ enum br2684_payload payload;
+};
+
+/*
+ * This lock should be held for writing any time the list of devices or
+ * their attached vcc's could be altered. It should be held for reading
+ * any time these are being queried. Note that we sometimes need to
+ * do read-locking under interrupting context, so write locking must block
+ * the current CPU's interrupts.
+ */
+static DEFINE_RWLOCK(devs_lock);
+
+static LIST_HEAD(br2684_devs);
+
+static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
+{
+ return netdev_priv(net_dev);
+}
+
+static inline struct net_device *list_entry_brdev(const struct list_head *le)
+{
+ return list_entry(le, struct br2684_dev, br2684_devs)->net_dev;
+}
+
+static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
+{
+ return (struct br2684_vcc *)(atmvcc->user_back);
+}
+
+static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
+{
+ return list_entry(le, struct br2684_vcc, brvccs);
+}
+
+/* Caller should hold read_lock(&devs_lock) */
+static struct net_device *br2684_find_dev(const struct br2684_if_spec *s)
+{
+ struct list_head *lh;
+ struct net_device *net_dev;
+ switch (s->method) {
+ case BR2684_FIND_BYNUM:
+ list_for_each(lh, &br2684_devs) {
+ net_dev = list_entry_brdev(lh);
+ if (BRPRIV(net_dev)->number == s->spec.devnum)
+ return net_dev;
+ }
+ break;
+ case BR2684_FIND_BYIFNAME:
+ list_for_each(lh, &br2684_devs) {
+ net_dev = list_entry_brdev(lh);
+ if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ))
+ return net_dev;
+ }
+ break;
+ }
+ return NULL;
+}
+
+static int atm_dev_event(struct notifier_block *this, unsigned long event,
+ void *arg)
+{
+ struct atm_dev *atm_dev = arg;
+ struct list_head *lh;
+ struct net_device *net_dev;
+ struct br2684_vcc *brvcc;
+ struct atm_vcc *atm_vcc;
+ unsigned long flags;
+
+ pr_debug("event=%ld dev=%p\n", event, atm_dev);
+
+ read_lock_irqsave(&devs_lock, flags);
+ list_for_each(lh, &br2684_devs) {
+ net_dev = list_entry_brdev(lh);
+
+ list_for_each_entry(brvcc, &BRPRIV(net_dev)->brvccs, brvccs) {
+ atm_vcc = brvcc->atmvcc;
+ if (atm_vcc && brvcc->atmvcc->dev == atm_dev) {
+
+ if (atm_vcc->dev->signal == ATM_PHY_SIG_LOST)
+ netif_carrier_off(net_dev);
+ else
+ netif_carrier_on(net_dev);
+
+ }
+ }
+ }
+ read_unlock_irqrestore(&devs_lock, flags);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block atm_dev_notifier = {
+ .notifier_call = atm_dev_event,
+};
+
+/* chained vcc->pop function. Check if we should wake the netif_queue */
+static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(vcc);
+
+ pr_debug("(vcc %p ; net_dev %p )\n", vcc, brvcc->device);
+ brvcc->old_pop(vcc, skb);
+
+ /* If the queue space just went up from zero, wake */
+ if (atomic_inc_return(&brvcc->qspace) == 1)
+ netif_wake_queue(brvcc->device);
+}
+
+/*
+ * Send a packet out a particular vcc. Not to useful right now, but paves
+ * the way for multiple vcc's per itf. Returns true if we can send,
+ * otherwise false
+ */
+static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
+ struct br2684_vcc *brvcc)
+{
+ struct br2684_dev *brdev = BRPRIV(dev);
+ struct atm_vcc *atmvcc;
+ int minheadroom = (brvcc->encaps == e_llc) ?
+ ((brdev->payload == p_bridged) ?
+ sizeof(llc_oui_pid_pad) : sizeof(llc_oui_ipv4)) :
+ ((brdev->payload == p_bridged) ? BR2684_PAD_LEN : 0);
+
+ if (skb_headroom(skb) < minheadroom) {
+ struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
+ brvcc->copies_needed++;
+ dev_kfree_skb(skb);
+ if (skb2 == NULL) {
+ brvcc->copies_failed++;
+ return 0;
+ }
+ skb = skb2;
+ }
+
+ if (brvcc->encaps == e_llc) {
+ if (brdev->payload == p_bridged) {
+ skb_push(skb, sizeof(llc_oui_pid_pad));
+ skb_copy_to_linear_data(skb, llc_oui_pid_pad,
+ sizeof(llc_oui_pid_pad));
+ } else if (brdev->payload == p_routed) {
+ unsigned short prot = ntohs(skb->protocol);
+
+ skb_push(skb, sizeof(llc_oui_ipv4));
+ switch (prot) {
+ case ETH_P_IP:
+ skb_copy_to_linear_data(skb, llc_oui_ipv4,
+ sizeof(llc_oui_ipv4));
+ break;
+ case ETH_P_IPV6:
+ skb_copy_to_linear_data(skb, llc_oui_ipv6,
+ sizeof(llc_oui_ipv6));
+ break;
+ default:
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ }
+ } else { /* e_vc */
+ if (brdev->payload == p_bridged) {
+ skb_push(skb, 2);
+ memset(skb->data, 0, 2);
+ }
+ }
+ skb_debug(skb);
+
+ ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
+ atm_account_tx(atmvcc, skb);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ if (atomic_dec_return(&brvcc->qspace) < 1) {
+ /* No more please! */
+ netif_stop_queue(brvcc->device);
+ /* We might have raced with br2684_pop() */
+ if (unlikely(atomic_read(&brvcc->qspace) > 0))
+ netif_wake_queue(brvcc->device);
+ }
+
+ /* If this fails immediately, the skb will be freed and br2684_pop()
+ will wake the queue if appropriate. Just return an error so that
+ the stats are updated correctly */
+ return !atmvcc->send(atmvcc, skb);
+}
+
+static void br2684_release_cb(struct atm_vcc *atmvcc)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+
+ if (atomic_read(&brvcc->qspace) > 0)
+ netif_wake_queue(brvcc->device);
+
+ if (brvcc->old_release_cb)
+ brvcc->old_release_cb(atmvcc);
+}
+
+static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
+ const struct br2684_dev *brdev)
+{
+ return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
+}
+
+static netdev_tx_t br2684_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct br2684_dev *brdev = BRPRIV(dev);
+ struct br2684_vcc *brvcc;
+ struct atm_vcc *atmvcc;
+ netdev_tx_t ret = NETDEV_TX_OK;
+
+ pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
+ read_lock(&devs_lock);
+ brvcc = pick_outgoing_vcc(skb, brdev);
+ if (brvcc == NULL) {
+ pr_debug("no vcc attached to dev %s\n", dev->name);
+ dev->stats.tx_errors++;
+ dev->stats.tx_carrier_errors++;
+ /* netif_stop_queue(dev); */
+ dev_kfree_skb(skb);
+ goto out_devs;
+ }
+ atmvcc = brvcc->atmvcc;
+
+ bh_lock_sock(sk_atm(atmvcc));
+
+ if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
+ !test_bit(ATM_VF_READY, &atmvcc->flags)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ goto out;
+ }
+
+ if (sock_owned_by_user(sk_atm(atmvcc))) {
+ netif_stop_queue(brvcc->device);
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
+ if (!br2684_xmit_vcc(skb, dev, brvcc)) {
+ /*
+ * We should probably use netif_*_queue() here, but that
+ * involves added complication. We need to walk before
+ * we can run.
+ *
+ * Don't free here! this pointer might be no longer valid!
+ */
+ dev->stats.tx_errors++;
+ dev->stats.tx_fifo_errors++;
+ }
+ out:
+ bh_unlock_sock(sk_atm(atmvcc));
+ out_devs:
+ read_unlock(&devs_lock);
+ return ret;
+}
+
+/*
+ * We remember when the MAC gets set, so we don't override it later with
+ * the ESI of the ATM card of the first VC
+ */
+static int br2684_mac_addr(struct net_device *dev, void *p)
+{
+ int err = eth_mac_addr(dev, p);
+ if (!err)
+ BRPRIV(dev)->mac_was_set = 1;
+ return err;
+}
+
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+/* this IOCTL is experimental. */
+static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
+{
+ struct br2684_vcc *brvcc;
+ struct br2684_filter_set fs;
+
+ if (copy_from_user(&fs, arg, sizeof fs))
+ return -EFAULT;
+ if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
+ /*
+ * This is really a per-vcc thing, but we can also search
+ * by device.
+ */
+ struct br2684_dev *brdev;
+ read_lock(&devs_lock);
+ brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
+ if (brdev == NULL || list_empty(&brdev->brvccs) ||
+ brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
+ brvcc = NULL;
+ else
+ brvcc = list_entry_brvcc(brdev->brvccs.next);
+ read_unlock(&devs_lock);
+ if (brvcc == NULL)
+ return -ESRCH;
+ } else
+ brvcc = BR2684_VCC(atmvcc);
+ memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
+ return 0;
+}
+
+/* Returns 1 if packet should be dropped */
+static inline int
+packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
+{
+ if (brvcc->filter.netmask == 0)
+ return 0; /* no filter in place */
+ if (type == htons(ETH_P_IP) &&
+ (((struct iphdr *)(skb->data))->daddr & brvcc->filter.
+ netmask) == brvcc->filter.prefix)
+ return 0;
+ if (type == htons(ETH_P_ARP))
+ return 0;
+ /*
+ * TODO: we should probably filter ARPs too.. don't want to have
+ * them returning values that don't make sense, or is that ok?
+ */
+ return 1; /* drop */
+}
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+
+static void br2684_close_vcc(struct br2684_vcc *brvcc)
+{
+ pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device);
+ write_lock_irq(&devs_lock);
+ list_del(&brvcc->brvccs);
+ write_unlock_irq(&devs_lock);
+ brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
+ brvcc->atmvcc->release_cb = brvcc->old_release_cb;
+ brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
+ module_put(brvcc->old_owner);
+ kfree(brvcc);
+}
+
+/* when AAL5 PDU comes in: */
+static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+ struct net_device *net_dev = brvcc->device;
+ struct br2684_dev *brdev = BRPRIV(net_dev);
+
+ pr_debug("\n");
+
+ if (unlikely(skb == NULL)) {
+ /* skb==NULL means VCC is being destroyed */
+ br2684_close_vcc(brvcc);
+ if (list_empty(&brdev->brvccs)) {
+ write_lock_irq(&devs_lock);
+ list_del(&brdev->br2684_devs);
+ write_unlock_irq(&devs_lock);
+ unregister_netdev(net_dev);
+ free_netdev(net_dev);
+ }
+ return;
+ }
+
+ skb_debug(skb);
+ atm_return(atmvcc, skb->truesize);
+ pr_debug("skb from brdev %p\n", brdev);
+ if (brvcc->encaps == e_llc) {
+
+ if (skb->len > 7 && skb->data[7] == 0x01)
+ __skb_trim(skb, skb->len - 4);
+
+ /* accept packets that have "ipv[46]" in the snap header */
+ if ((skb->len >= (sizeof(llc_oui_ipv4))) &&
+ (memcmp(skb->data, llc_oui_ipv4,
+ sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
+ if (memcmp(skb->data + 6, ethertype_ipv6,
+ sizeof(ethertype_ipv6)) == 0)
+ skb->protocol = htons(ETH_P_IPV6);
+ else if (memcmp(skb->data + 6, ethertype_ipv4,
+ sizeof(ethertype_ipv4)) == 0)
+ skb->protocol = htons(ETH_P_IP);
+ else
+ goto error;
+ skb_pull(skb, sizeof(llc_oui_ipv4));
+ skb_reset_network_header(skb);
+ skb->pkt_type = PACKET_HOST;
+ /*
+ * Let us waste some time for checking the encapsulation.
+ * Note, that only 7 char is checked so frames with a valid FCS
+ * are also accepted (but FCS is not checked of course).
+ */
+ } else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
+ (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
+ skb_pull(skb, sizeof(llc_oui_pid_pad));
+ skb->protocol = eth_type_trans(skb, net_dev);
+ } else
+ goto error;
+
+ } else { /* e_vc */
+ if (brdev->payload == p_routed) {
+ struct iphdr *iph;
+
+ skb_reset_network_header(skb);
+ iph = ip_hdr(skb);
+ if (iph->version == 4)
+ skb->protocol = htons(ETH_P_IP);
+ else if (iph->version == 6)
+ skb->protocol = htons(ETH_P_IPV6);
+ else
+ goto error;
+ skb->pkt_type = PACKET_HOST;
+ } else { /* p_bridged */
+ /* first 2 chars should be 0 */
+ if (memcmp(skb->data, pad, BR2684_PAD_LEN) != 0)
+ goto error;
+ skb_pull(skb, BR2684_PAD_LEN);
+ skb->protocol = eth_type_trans(skb, net_dev);
+ }
+ }
+
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
+ goto dropped;
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ skb->dev = net_dev;
+ ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
+ pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
+ skb_debug(skb);
+ /* sigh, interface is down? */
+ if (unlikely(!(net_dev->flags & IFF_UP)))
+ goto dropped;
+ net_dev->stats.rx_packets++;
+ net_dev->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+ return;
+
+dropped:
+ net_dev->stats.rx_dropped++;
+ goto free_skb;
+error:
+ net_dev->stats.rx_errors++;
+free_skb:
+ dev_kfree_skb(skb);
+}
+
+/*
+ * Assign a vcc to a dev
+ * Note: we do not have explicit unassign, but look at _push()
+ */
+static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
+{
+ struct br2684_vcc *brvcc;
+ struct br2684_dev *brdev;
+ struct net_device *net_dev;
+ struct atm_backend_br2684 be;
+ int err;
+
+ if (copy_from_user(&be, arg, sizeof be))
+ return -EFAULT;
+ brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
+ if (!brvcc)
+ return -ENOMEM;
+ /*
+ * Allow two packets in the ATM queue. One actually being sent, and one
+ * for the ATM 'TX done' handler to send. It shouldn't take long to get
+ * the next one from the netdev queue, when we need it. More than that
+ * would be bufferbloat.
+ */
+ atomic_set(&brvcc->qspace, 2);
+ write_lock_irq(&devs_lock);
+ net_dev = br2684_find_dev(&be.ifspec);
+ if (net_dev == NULL) {
+ pr_err("tried to attach to non-existent device\n");
+ err = -ENXIO;
+ goto error;
+ }
+ brdev = BRPRIV(net_dev);
+ if (atmvcc->push == NULL) {
+ err = -EBADFD;
+ goto error;
+ }
+ if (!list_empty(&brdev->brvccs)) {
+ /* Only 1 VCC/dev right now */
+ err = -EEXIST;
+ goto error;
+ }
+ if (be.fcs_in != BR2684_FCSIN_NO ||
+ be.fcs_out != BR2684_FCSOUT_NO ||
+ be.fcs_auto || be.has_vpiid || be.send_padding ||
+ (be.encaps != BR2684_ENCAPS_VC &&
+ be.encaps != BR2684_ENCAPS_LLC) ||
+ be.min_size != 0) {
+ err = -EINVAL;
+ goto error;
+ }
+ pr_debug("vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, brvcc);
+ if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
+ unsigned char *esi = atmvcc->dev->esi;
+ const u8 one = 1;
+
+ if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
+ dev_addr_set(net_dev, esi);
+ else
+ dev_addr_mod(net_dev, 2, &one, 1);
+ }
+ list_add(&brvcc->brvccs, &brdev->brvccs);
+ write_unlock_irq(&devs_lock);
+ brvcc->device = net_dev;
+ brvcc->atmvcc = atmvcc;
+ atmvcc->user_back = brvcc;
+ brvcc->encaps = (enum br2684_encaps)be.encaps;
+ brvcc->old_push = atmvcc->push;
+ brvcc->old_pop = atmvcc->pop;
+ brvcc->old_release_cb = atmvcc->release_cb;
+ brvcc->old_owner = atmvcc->owner;
+ barrier();
+ atmvcc->push = br2684_push;
+ atmvcc->pop = br2684_pop;
+ atmvcc->release_cb = br2684_release_cb;
+ atmvcc->owner = THIS_MODULE;
+
+ /* initialize netdev carrier state */
+ if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
+ netif_carrier_off(net_dev);
+ else
+ netif_carrier_on(net_dev);
+
+ __module_get(THIS_MODULE);
+
+ /* re-process everything received between connection setup and
+ backend setup */
+ vcc_process_recv_queue(atmvcc);
+ return 0;
+
+error:
+ write_unlock_irq(&devs_lock);
+ kfree(brvcc);
+ return err;
+}
+
+static const struct net_device_ops br2684_netdev_ops = {
+ .ndo_start_xmit = br2684_start_xmit,
+ .ndo_set_mac_address = br2684_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static const struct net_device_ops br2684_netdev_ops_routed = {
+ .ndo_start_xmit = br2684_start_xmit,
+ .ndo_set_mac_address = br2684_mac_addr,
+};
+
+static void br2684_setup(struct net_device *netdev)
+{
+ struct br2684_dev *brdev = BRPRIV(netdev);
+
+ ether_setup(netdev);
+ netdev->hard_header_len += sizeof(llc_oui_pid_pad); /* worst case */
+ brdev->net_dev = netdev;
+
+ netdev->netdev_ops = &br2684_netdev_ops;
+
+ INIT_LIST_HEAD(&brdev->brvccs);
+}
+
+static void br2684_setup_routed(struct net_device *netdev)
+{
+ struct br2684_dev *brdev = BRPRIV(netdev);
+
+ brdev->net_dev = netdev;
+ netdev->hard_header_len = sizeof(llc_oui_ipv4); /* worst case */
+ netdev->netdev_ops = &br2684_netdev_ops_routed;
+ netdev->addr_len = 0;
+ netdev->mtu = ETH_DATA_LEN;
+ netdev->min_mtu = 0;
+ netdev->max_mtu = ETH_MAX_MTU;
+ netdev->type = ARPHRD_PPP;
+ netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ netdev->tx_queue_len = 100;
+ INIT_LIST_HEAD(&brdev->brvccs);
+}
+
+static int br2684_create(void __user *arg)
+{
+ int err;
+ struct net_device *netdev;
+ struct br2684_dev *brdev;
+ struct atm_newif_br2684 ni;
+ enum br2684_payload payload;
+
+ pr_debug("\n");
+
+ if (copy_from_user(&ni, arg, sizeof ni))
+ return -EFAULT;
+
+ if (ni.media & BR2684_FLAG_ROUTED)
+ payload = p_routed;
+ else
+ payload = p_bridged;
+ ni.media &= 0xffff; /* strip flags */
+
+ if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500)
+ return -EINVAL;
+
+ netdev = alloc_netdev(sizeof(struct br2684_dev),
+ ni.ifname[0] ? ni.ifname : "nas%d",
+ NET_NAME_UNKNOWN,
+ (payload == p_routed) ? br2684_setup_routed : br2684_setup);
+ if (!netdev)
+ return -ENOMEM;
+
+ brdev = BRPRIV(netdev);
+
+ pr_debug("registered netdev %s\n", netdev->name);
+ /* open, stop, do_ioctl ? */
+ err = register_netdev(netdev);
+ if (err < 0) {
+ pr_err("register_netdev failed\n");
+ free_netdev(netdev);
+ return err;
+ }
+
+ write_lock_irq(&devs_lock);
+
+ brdev->payload = payload;
+
+ if (list_empty(&br2684_devs)) {
+ /* 1st br2684 device */
+ brdev->number = 1;
+ } else
+ brdev->number = BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
+
+ list_add_tail(&brdev->br2684_devs, &br2684_devs);
+ write_unlock_irq(&devs_lock);
+ return 0;
+}
+
+/*
+ * This handles ioctls actually performed on our vcc - we must return
+ * -ENOIOCTLCMD for any unrecognized ioctl
+ */
+static int br2684_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct atm_vcc *atmvcc = ATM_SD(sock);
+ void __user *argp = (void __user *)arg;
+ atm_backend_t b;
+
+ int err;
+ switch (cmd) {
+ case ATM_SETBACKEND:
+ case ATM_NEWBACKENDIF:
+ err = get_user(b, (atm_backend_t __user *) argp);
+ if (err)
+ return -EFAULT;
+ if (b != ATM_BACKEND_BR2684)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (cmd == ATM_SETBACKEND) {
+ if (sock->state != SS_CONNECTED)
+ return -EINVAL;
+ return br2684_regvcc(atmvcc, argp);
+ } else {
+ return br2684_create(argp);
+ }
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ case BR2684_SETFILT:
+ if (atmvcc->push != br2684_push)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ err = br2684_setfilt(atmvcc, argp);
+
+ return err;
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ }
+ return -ENOIOCTLCMD;
+}
+
+static struct atm_ioctl br2684_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = br2684_ioctl,
+};
+
+#ifdef CONFIG_PROC_FS
+static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
+ __acquires(devs_lock)
+{
+ read_lock(&devs_lock);
+ return seq_list_start(&br2684_devs, *pos);
+}
+
+static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
+{
+ return seq_list_next(v, &br2684_devs, pos);
+}
+
+static void br2684_seq_stop(struct seq_file *seq, void *v)
+ __releases(devs_lock)
+{
+ read_unlock(&devs_lock);
+}
+
+static int br2684_seq_show(struct seq_file *seq, void *v)
+{
+ const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
+ br2684_devs);
+ const struct net_device *net_dev = brdev->net_dev;
+ const struct br2684_vcc *brvcc;
+
+ seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
+ net_dev->name,
+ brdev->number,
+ net_dev->dev_addr,
+ brdev->mac_was_set ? "set" : "auto");
+
+ list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
+ seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s"
+ ", failed copies %u/%u"
+ "\n", brvcc->atmvcc->dev->number,
+ brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
+ (brvcc->encaps == e_llc) ? "LLC" : "VC",
+ (brdev->payload == p_bridged) ? "bridged" : "routed",
+ brvcc->copies_failed, brvcc->copies_needed);
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ if (brvcc->filter.netmask != 0)
+ seq_printf(seq, " filter=%pI4/%pI4\n",
+ &brvcc->filter.prefix,
+ &brvcc->filter.netmask);
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ }
+ return 0;
+}
+
+static const struct seq_operations br2684_seq_ops = {
+ .start = br2684_seq_start,
+ .next = br2684_seq_next,
+ .stop = br2684_seq_stop,
+ .show = br2684_seq_show,
+};
+
+extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
+#endif /* CONFIG_PROC_FS */
+
+static int __init br2684_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *p;
+ p = proc_create_seq("br2684", 0, atm_proc_root, &br2684_seq_ops);
+ if (p == NULL)
+ return -ENOMEM;
+#endif
+ register_atm_ioctl(&br2684_ioctl_ops);
+ register_atmdevice_notifier(&atm_dev_notifier);
+ return 0;
+}
+
+static void __exit br2684_exit(void)
+{
+ struct net_device *net_dev;
+ struct br2684_dev *brdev;
+ struct br2684_vcc *brvcc;
+ deregister_atm_ioctl(&br2684_ioctl_ops);
+
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("br2684", atm_proc_root);
+#endif
+
+
+ unregister_atmdevice_notifier(&atm_dev_notifier);
+
+ while (!list_empty(&br2684_devs)) {
+ net_dev = list_entry_brdev(br2684_devs.next);
+ brdev = BRPRIV(net_dev);
+ while (!list_empty(&brdev->brvccs)) {
+ brvcc = list_entry_brvcc(brdev->brvccs.next);
+ br2684_close_vcc(brvcc);
+ }
+
+ list_del(&brdev->br2684_devs);
+ unregister_netdev(net_dev);
+ free_netdev(net_dev);
+ }
+}
+
+module_init(br2684_init);
+module_exit(br2684_exit);
+
+MODULE_AUTHOR("Marcell GAL");
+MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
+MODULE_LICENSE("GPL");
diff --git a/net/atm/clip.c b/net/atm/clip.c
new file mode 100644
index 000000000..294cb9efe
--- /dev/null
+++ b/net/atm/clip.c
@@ -0,0 +1,929 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* net/atm/clip.c - RFC1577 Classical IP over ATM */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/kernel.h> /* for UINT_MAX */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/timer.h>
+#include <linux/if_arp.h> /* for some manifest constants */
+#include <linux/notifier.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmclip.h>
+#include <linux/atmarp.h>
+#include <linux/capability.h>
+#include <linux/ip.h> /* for net/route.h */
+#include <linux/in.h> /* for struct sockaddr_in */
+#include <linux/if.h> /* for IFF_UP */
+#include <linux/inetdevice.h>
+#include <linux/bitops.h>
+#include <linux/poison.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/rcupdate.h>
+#include <linux/jhash.h>
+#include <linux/slab.h>
+#include <net/route.h> /* for struct rtable and routing */
+#include <net/icmp.h> /* icmp_send */
+#include <net/arp.h>
+#include <linux/param.h> /* for HZ */
+#include <linux/uaccess.h>
+#include <asm/byteorder.h> /* for htons etc. */
+#include <linux/atomic.h>
+
+#include "common.h"
+#include "resources.h"
+#include <net/atmclip.h>
+
+static struct net_device *clip_devs;
+static struct atm_vcc *atmarpd;
+static struct timer_list idle_timer;
+static const struct neigh_ops clip_neigh_ops;
+
+static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip)
+{
+ struct sock *sk;
+ struct atmarp_ctrl *ctrl;
+ struct sk_buff *skb;
+
+ pr_debug("(%d)\n", type);
+ if (!atmarpd)
+ return -EUNATCH;
+ skb = alloc_skb(sizeof(struct atmarp_ctrl), GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+ ctrl = skb_put(skb, sizeof(struct atmarp_ctrl));
+ ctrl->type = type;
+ ctrl->itf_num = itf;
+ ctrl->ip = ip;
+ atm_force_charge(atmarpd, skb->truesize);
+
+ sk = sk_atm(atmarpd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+ return 0;
+}
+
+static void link_vcc(struct clip_vcc *clip_vcc, struct atmarp_entry *entry)
+{
+ pr_debug("%p to entry %p (neigh %p)\n", clip_vcc, entry, entry->neigh);
+ clip_vcc->entry = entry;
+ clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */
+ clip_vcc->next = entry->vccs;
+ entry->vccs = clip_vcc;
+ entry->neigh->used = jiffies;
+}
+
+static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
+{
+ struct atmarp_entry *entry = clip_vcc->entry;
+ struct clip_vcc **walk;
+
+ if (!entry) {
+ pr_err("!clip_vcc->entry (clip_vcc %p)\n", clip_vcc);
+ return;
+ }
+ netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */
+ entry->neigh->used = jiffies;
+ for (walk = &entry->vccs; *walk; walk = &(*walk)->next)
+ if (*walk == clip_vcc) {
+ int error;
+
+ *walk = clip_vcc->next; /* atomic */
+ clip_vcc->entry = NULL;
+ if (clip_vcc->xoff)
+ netif_wake_queue(entry->neigh->dev);
+ if (entry->vccs)
+ goto out;
+ entry->expires = jiffies - 1;
+ /* force resolution or expiration */
+ error = neigh_update(entry->neigh, NULL, NUD_NONE,
+ NEIGH_UPDATE_F_ADMIN, 0);
+ if (error)
+ pr_err("neigh_update failed with %d\n", error);
+ goto out;
+ }
+ pr_err("ATMARP: failed (entry %p, vcc 0x%p)\n", entry, clip_vcc);
+out:
+ netif_tx_unlock_bh(entry->neigh->dev);
+}
+
+/* The neighbour entry n->lock is held. */
+static int neigh_check_cb(struct neighbour *n)
+{
+ struct atmarp_entry *entry = neighbour_priv(n);
+ struct clip_vcc *cv;
+
+ if (n->ops != &clip_neigh_ops)
+ return 0;
+ for (cv = entry->vccs; cv; cv = cv->next) {
+ unsigned long exp = cv->last_use + cv->idle_timeout;
+
+ if (cv->idle_timeout && time_after(jiffies, exp)) {
+ pr_debug("releasing vcc %p->%p of entry %p\n",
+ cv, cv->vcc, entry);
+ vcc_release_async(cv->vcc, -ETIMEDOUT);
+ }
+ }
+
+ if (entry->vccs || time_before(jiffies, entry->expires))
+ return 0;
+
+ if (refcount_read(&n->refcnt) > 1) {
+ struct sk_buff *skb;
+
+ pr_debug("destruction postponed with ref %d\n",
+ refcount_read(&n->refcnt));
+
+ while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
+ dev_kfree_skb(skb);
+
+ return 0;
+ }
+
+ pr_debug("expired neigh %p\n", n);
+ return 1;
+}
+
+static void idle_timer_check(struct timer_list *unused)
+{
+ write_lock(&arp_tbl.lock);
+ __neigh_for_each_release(&arp_tbl, neigh_check_cb);
+ mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
+ write_unlock(&arp_tbl.lock);
+}
+
+static int clip_arp_rcv(struct sk_buff *skb)
+{
+ struct atm_vcc *vcc;
+
+ pr_debug("\n");
+ vcc = ATM_SKB(skb)->vcc;
+ if (!vcc || !atm_charge(vcc, skb->truesize)) {
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+ pr_debug("pushing to %p\n", vcc);
+ pr_debug("using %p\n", CLIP_VCC(vcc)->old_push);
+ CLIP_VCC(vcc)->old_push(vcc, skb);
+ return 0;
+}
+
+static const unsigned char llc_oui[] = {
+ 0xaa, /* DSAP: non-ISO */
+ 0xaa, /* SSAP: non-ISO */
+ 0x03, /* Ctrl: Unnumbered Information Command PDU */
+ 0x00, /* OUI: EtherType */
+ 0x00,
+ 0x00
+};
+
+static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+
+ pr_debug("\n");
+
+ if (!clip_devs) {
+ atm_return(vcc, skb->truesize);
+ kfree_skb(skb);
+ return;
+ }
+
+ if (!skb) {
+ pr_debug("removing VCC %p\n", clip_vcc);
+ if (clip_vcc->entry)
+ unlink_clip_vcc(clip_vcc);
+ clip_vcc->old_push(vcc, NULL); /* pass on the bad news */
+ kfree(clip_vcc);
+ return;
+ }
+ atm_return(vcc, skb->truesize);
+ skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs;
+ /* clip_vcc->entry == NULL if we don't have an IP address yet */
+ if (!skb->dev) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ ATM_SKB(skb)->vcc = vcc;
+ skb_reset_mac_header(skb);
+ if (!clip_vcc->encap ||
+ skb->len < RFC1483LLC_LEN ||
+ memcmp(skb->data, llc_oui, sizeof(llc_oui)))
+ skb->protocol = htons(ETH_P_IP);
+ else {
+ skb->protocol = ((__be16 *)skb->data)[3];
+ skb_pull(skb, RFC1483LLC_LEN);
+ if (skb->protocol == htons(ETH_P_ARP)) {
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
+ clip_arp_rcv(skb);
+ return;
+ }
+ }
+ clip_vcc->last_use = jiffies;
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+}
+
+/*
+ * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that
+ * clip_pop is atomic with respect to the critical section in clip_start_xmit.
+ */
+
+static void clip_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+ struct net_device *dev = skb->dev;
+ int old;
+ unsigned long flags;
+
+ pr_debug("(vcc %p)\n", vcc);
+ clip_vcc->old_pop(vcc, skb);
+ /* skb->dev == NULL in outbound ARP packets */
+ if (!dev)
+ return;
+ spin_lock_irqsave(&PRIV(dev)->xoff_lock, flags);
+ if (atm_may_send(vcc, 0)) {
+ old = xchg(&clip_vcc->xoff, 0);
+ if (old)
+ netif_wake_queue(dev);
+ }
+ spin_unlock_irqrestore(&PRIV(dev)->xoff_lock, flags);
+}
+
+static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb)
+{
+ __be32 *ip = (__be32 *) neigh->primary_key;
+
+ pr_debug("(neigh %p, skb %p)\n", neigh, skb);
+ to_atmarpd(act_need, PRIV(neigh->dev)->number, *ip);
+}
+
+static void clip_neigh_error(struct neighbour *neigh, struct sk_buff *skb)
+{
+#ifndef CONFIG_ATM_CLIP_NO_ICMP
+ icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
+#endif
+ kfree_skb(skb);
+}
+
+static const struct neigh_ops clip_neigh_ops = {
+ .family = AF_INET,
+ .solicit = clip_neigh_solicit,
+ .error_report = clip_neigh_error,
+ .output = neigh_direct_output,
+ .connected_output = neigh_direct_output,
+};
+
+static int clip_constructor(struct net_device *dev, struct neighbour *neigh)
+{
+ struct atmarp_entry *entry = neighbour_priv(neigh);
+
+ if (neigh->tbl->family != AF_INET)
+ return -EINVAL;
+
+ if (neigh->type != RTN_UNICAST)
+ return -EINVAL;
+
+ neigh->nud_state = NUD_NONE;
+ neigh->ops = &clip_neigh_ops;
+ neigh->output = neigh->ops->output;
+ entry->neigh = neigh;
+ entry->vccs = NULL;
+ entry->expires = jiffies - 1;
+
+ return 0;
+}
+
+/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
+
+/*
+ * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means
+ * to allocate the neighbour entry but not to ask atmarpd for resolution. Also,
+ * don't increment the usage count. This is used to create entries in
+ * clip_setentry.
+ */
+
+static int clip_encap(struct atm_vcc *vcc, int mode)
+{
+ if (!CLIP_VCC(vcc))
+ return -EBADFD;
+
+ CLIP_VCC(vcc)->encap = mode;
+ return 0;
+}
+
+static netdev_tx_t clip_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct clip_priv *clip_priv = PRIV(dev);
+ struct dst_entry *dst = skb_dst(skb);
+ struct atmarp_entry *entry;
+ struct neighbour *n;
+ struct atm_vcc *vcc;
+ struct rtable *rt;
+ __be32 *daddr;
+ int old;
+ unsigned long flags;
+
+ pr_debug("(skb %p)\n", skb);
+ if (!dst) {
+ pr_err("skb_dst(skb) == NULL\n");
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+ rt = (struct rtable *) dst;
+ if (rt->rt_gw_family == AF_INET)
+ daddr = &rt->rt_gw4;
+ else
+ daddr = &ip_hdr(skb)->daddr;
+ n = dst_neigh_lookup(dst, daddr);
+ if (!n) {
+ pr_err("NO NEIGHBOUR !\n");
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+ entry = neighbour_priv(n);
+ if (!entry->vccs) {
+ if (time_after(jiffies, entry->expires)) {
+ /* should be resolved */
+ entry->expires = jiffies + ATMARP_RETRY_DELAY * HZ;
+ to_atmarpd(act_need, PRIV(dev)->number, *((__be32 *)n->primary_key));
+ }
+ if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
+ skb_queue_tail(&entry->neigh->arp_queue, skb);
+ else {
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ }
+ goto out_release_neigh;
+ }
+ pr_debug("neigh %p, vccs %p\n", entry, entry->vccs);
+ ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
+ pr_debug("using neighbour %p, vcc %p\n", n, vcc);
+ if (entry->vccs->encap) {
+ void *here;
+
+ here = skb_push(skb, RFC1483LLC_LEN);
+ memcpy(here, llc_oui, sizeof(llc_oui));
+ ((__be16 *) here)[3] = skb->protocol;
+ }
+ atm_account_tx(vcc, skb);
+ entry->vccs->last_use = jiffies;
+ pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev);
+ old = xchg(&entry->vccs->xoff, 1); /* assume XOFF ... */
+ if (old) {
+ pr_warn("XOFF->XOFF transition\n");
+ goto out_release_neigh;
+ }
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ vcc->send(vcc, skb);
+ if (atm_may_send(vcc, 0)) {
+ entry->vccs->xoff = 0;
+ goto out_release_neigh;
+ }
+ spin_lock_irqsave(&clip_priv->xoff_lock, flags);
+ netif_stop_queue(dev); /* XOFF -> throttle immediately */
+ barrier();
+ if (!entry->vccs->xoff)
+ netif_start_queue(dev);
+ /* Oh, we just raced with clip_pop. netif_start_queue should be
+ good enough, because nothing should really be asleep because
+ of the brief netif_stop_queue. If this isn't true or if it
+ changes, use netif_wake_queue instead. */
+ spin_unlock_irqrestore(&clip_priv->xoff_lock, flags);
+out_release_neigh:
+ neigh_release(n);
+ return NETDEV_TX_OK;
+}
+
+static int clip_mkip(struct atm_vcc *vcc, int timeout)
+{
+ struct clip_vcc *clip_vcc;
+
+ if (!vcc->push)
+ return -EBADFD;
+ clip_vcc = kmalloc(sizeof(struct clip_vcc), GFP_KERNEL);
+ if (!clip_vcc)
+ return -ENOMEM;
+ pr_debug("%p vcc %p\n", clip_vcc, vcc);
+ clip_vcc->vcc = vcc;
+ vcc->user_back = clip_vcc;
+ set_bit(ATM_VF_IS_CLIP, &vcc->flags);
+ clip_vcc->entry = NULL;
+ clip_vcc->xoff = 0;
+ clip_vcc->encap = 1;
+ clip_vcc->last_use = jiffies;
+ clip_vcc->idle_timeout = timeout * HZ;
+ clip_vcc->old_push = vcc->push;
+ clip_vcc->old_pop = vcc->pop;
+ vcc->push = clip_push;
+ vcc->pop = clip_pop;
+
+ /* re-process everything received between connection setup and MKIP */
+ vcc_process_recv_queue(vcc);
+
+ return 0;
+}
+
+static int clip_setentry(struct atm_vcc *vcc, __be32 ip)
+{
+ struct neighbour *neigh;
+ struct atmarp_entry *entry;
+ int error;
+ struct clip_vcc *clip_vcc;
+ struct rtable *rt;
+
+ if (vcc->push != clip_push) {
+ pr_warn("non-CLIP VCC\n");
+ return -EBADF;
+ }
+ clip_vcc = CLIP_VCC(vcc);
+ if (!ip) {
+ if (!clip_vcc->entry) {
+ pr_err("hiding hidden ATMARP entry\n");
+ return 0;
+ }
+ pr_debug("remove\n");
+ unlink_clip_vcc(clip_vcc);
+ return 0;
+ }
+ rt = ip_route_output(&init_net, ip, 0, 1, 0);
+ if (IS_ERR(rt))
+ return PTR_ERR(rt);
+ neigh = __neigh_lookup(&arp_tbl, &ip, rt->dst.dev, 1);
+ ip_rt_put(rt);
+ if (!neigh)
+ return -ENOMEM;
+ entry = neighbour_priv(neigh);
+ if (entry != clip_vcc->entry) {
+ if (!clip_vcc->entry)
+ pr_debug("add\n");
+ else {
+ pr_debug("update\n");
+ unlink_clip_vcc(clip_vcc);
+ }
+ link_vcc(clip_vcc, entry);
+ }
+ error = neigh_update(neigh, llc_oui, NUD_PERMANENT,
+ NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN, 0);
+ neigh_release(neigh);
+ return error;
+}
+
+static const struct net_device_ops clip_netdev_ops = {
+ .ndo_start_xmit = clip_start_xmit,
+ .ndo_neigh_construct = clip_constructor,
+};
+
+static void clip_setup(struct net_device *dev)
+{
+ dev->netdev_ops = &clip_netdev_ops;
+ dev->type = ARPHRD_ATM;
+ dev->neigh_priv_len = sizeof(struct atmarp_entry);
+ dev->hard_header_len = RFC1483LLC_LEN;
+ dev->mtu = RFC1626_MTU;
+ dev->tx_queue_len = 100; /* "normal" queue (packets) */
+ /* When using a "real" qdisc, the qdisc determines the queue */
+ /* length. tx_queue_len is only used for the default case, */
+ /* without any more elaborate queuing. 100 is a reasonable */
+ /* compromise between decent burst-tolerance and protection */
+ /* against memory hogs. */
+ netif_keep_dst(dev);
+}
+
+static int clip_create(int number)
+{
+ struct net_device *dev;
+ struct clip_priv *clip_priv;
+ int error;
+
+ if (number != -1) {
+ for (dev = clip_devs; dev; dev = PRIV(dev)->next)
+ if (PRIV(dev)->number == number)
+ return -EEXIST;
+ } else {
+ number = 0;
+ for (dev = clip_devs; dev; dev = PRIV(dev)->next)
+ if (PRIV(dev)->number >= number)
+ number = PRIV(dev)->number + 1;
+ }
+ dev = alloc_netdev(sizeof(struct clip_priv), "", NET_NAME_UNKNOWN,
+ clip_setup);
+ if (!dev)
+ return -ENOMEM;
+ clip_priv = PRIV(dev);
+ sprintf(dev->name, "atm%d", number);
+ spin_lock_init(&clip_priv->xoff_lock);
+ clip_priv->number = number;
+ error = register_netdev(dev);
+ if (error) {
+ free_netdev(dev);
+ return error;
+ }
+ clip_priv->next = clip_devs;
+ clip_devs = dev;
+ pr_debug("registered (net:%s)\n", dev->name);
+ return number;
+}
+
+static int clip_device_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+
+ if (event == NETDEV_UNREGISTER)
+ return NOTIFY_DONE;
+
+ /* ignore non-CLIP devices */
+ if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ pr_debug("NETDEV_UP\n");
+ to_atmarpd(act_up, PRIV(dev)->number, 0);
+ break;
+ case NETDEV_GOING_DOWN:
+ pr_debug("NETDEV_DOWN\n");
+ to_atmarpd(act_down, PRIV(dev)->number, 0);
+ break;
+ case NETDEV_CHANGE:
+ case NETDEV_CHANGEMTU:
+ pr_debug("NETDEV_CHANGE*\n");
+ to_atmarpd(act_change, PRIV(dev)->number, 0);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static int clip_inet_event(struct notifier_block *this, unsigned long event,
+ void *ifa)
+{
+ struct in_device *in_dev;
+ struct netdev_notifier_info info;
+
+ in_dev = ((struct in_ifaddr *)ifa)->ifa_dev;
+ /*
+ * Transitions are of the down-change-up type, so it's sufficient to
+ * handle the change on up.
+ */
+ if (event != NETDEV_UP)
+ return NOTIFY_DONE;
+ netdev_notifier_info_init(&info, in_dev->dev);
+ return clip_device_event(this, NETDEV_CHANGE, &info);
+}
+
+static struct notifier_block clip_dev_notifier = {
+ .notifier_call = clip_device_event,
+};
+
+
+
+static struct notifier_block clip_inet_notifier = {
+ .notifier_call = clip_inet_event,
+};
+
+
+
+static void atmarpd_close(struct atm_vcc *vcc)
+{
+ pr_debug("\n");
+
+ rtnl_lock();
+ atmarpd = NULL;
+ skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+ rtnl_unlock();
+
+ pr_debug("(done)\n");
+ module_put(THIS_MODULE);
+}
+
+static const struct atmdev_ops atmarpd_dev_ops = {
+ .close = atmarpd_close
+};
+
+
+static struct atm_dev atmarpd_dev = {
+ .ops = &atmarpd_dev_ops,
+ .type = "arpd",
+ .number = 999,
+ .lock = __SPIN_LOCK_UNLOCKED(atmarpd_dev.lock)
+};
+
+
+static int atm_init_atmarp(struct atm_vcc *vcc)
+{
+ rtnl_lock();
+ if (atmarpd) {
+ rtnl_unlock();
+ return -EADDRINUSE;
+ }
+
+ mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ);
+
+ atmarpd = vcc;
+ set_bit(ATM_VF_META, &vcc->flags);
+ set_bit(ATM_VF_READY, &vcc->flags);
+ /* allow replies and avoid getting closed if signaling dies */
+ vcc->dev = &atmarpd_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ vcc->push = NULL;
+ vcc->pop = NULL; /* crash */
+ vcc->push_oam = NULL; /* crash */
+ rtnl_unlock();
+ return 0;
+}
+
+static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int err = 0;
+
+ switch (cmd) {
+ case SIOCMKCLIP:
+ case ATMARPD_CTRL:
+ case ATMARP_MKIP:
+ case ATMARP_SETENTRY:
+ case ATMARP_ENCAP:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ switch (cmd) {
+ case SIOCMKCLIP:
+ err = clip_create(arg);
+ break;
+ case ATMARPD_CTRL:
+ err = atm_init_atmarp(vcc);
+ if (!err) {
+ sock->state = SS_CONNECTED;
+ __module_get(THIS_MODULE);
+ }
+ break;
+ case ATMARP_MKIP:
+ err = clip_mkip(vcc, arg);
+ break;
+ case ATMARP_SETENTRY:
+ err = clip_setentry(vcc, (__force __be32)arg);
+ break;
+ case ATMARP_ENCAP:
+ err = clip_encap(vcc, arg);
+ break;
+ }
+ return err;
+}
+
+static struct atm_ioctl clip_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = clip_ioctl,
+};
+
+#ifdef CONFIG_PROC_FS
+
+static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr)
+{
+ static int code[] = { 1, 2, 10, 6, 1, 0 };
+ static int e164[] = { 1, 8, 4, 6, 1, 0 };
+
+ if (*addr->sas_addr.pub) {
+ seq_printf(seq, "%s", addr->sas_addr.pub);
+ if (*addr->sas_addr.prv)
+ seq_putc(seq, '+');
+ } else if (!*addr->sas_addr.prv) {
+ seq_printf(seq, "%s", "(none)");
+ return;
+ }
+ if (*addr->sas_addr.prv) {
+ unsigned char *prv = addr->sas_addr.prv;
+ int *fields;
+ int i, j;
+
+ fields = *prv == ATM_AFI_E164 ? e164 : code;
+ for (i = 0; fields[i]; i++) {
+ for (j = fields[i]; j; j--)
+ seq_printf(seq, "%02X", *prv++);
+ if (fields[i + 1])
+ seq_putc(seq, '.');
+ }
+ }
+}
+
+/* This means the neighbour entry has no attached VCC objects. */
+#define SEQ_NO_VCC_TOKEN ((void *) 2)
+
+static void atmarp_info(struct seq_file *seq, struct neighbour *n,
+ struct atmarp_entry *entry, struct clip_vcc *clip_vcc)
+{
+ struct net_device *dev = n->dev;
+ unsigned long exp;
+ char buf[17];
+ int svc, llc, off;
+
+ svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
+ (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC));
+
+ llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap);
+
+ if (clip_vcc == SEQ_NO_VCC_TOKEN)
+ exp = entry->neigh->used;
+ else
+ exp = clip_vcc->last_use;
+
+ exp = (jiffies - exp) / HZ;
+
+ seq_printf(seq, "%-6s%-4s%-4s%5ld ",
+ dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp);
+
+ off = scnprintf(buf, sizeof(buf) - 1, "%pI4", n->primary_key);
+ while (off < 16)
+ buf[off++] = ' ';
+ buf[off] = '\0';
+ seq_printf(seq, "%s", buf);
+
+ if (clip_vcc == SEQ_NO_VCC_TOKEN) {
+ if (time_before(jiffies, entry->expires))
+ seq_printf(seq, "(resolving)\n");
+ else
+ seq_printf(seq, "(expired, ref %d)\n",
+ refcount_read(&entry->neigh->refcnt));
+ } else if (!svc) {
+ seq_printf(seq, "%d.%d.%d\n",
+ clip_vcc->vcc->dev->number,
+ clip_vcc->vcc->vpi, clip_vcc->vcc->vci);
+ } else {
+ svc_addr(seq, &clip_vcc->vcc->remote);
+ seq_putc(seq, '\n');
+ }
+}
+
+struct clip_seq_state {
+ /* This member must be first. */
+ struct neigh_seq_state ns;
+
+ /* Local to clip specific iteration. */
+ struct clip_vcc *vcc;
+};
+
+static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e,
+ struct clip_vcc *curr)
+{
+ if (!curr) {
+ curr = e->vccs;
+ if (!curr)
+ return SEQ_NO_VCC_TOKEN;
+ return curr;
+ }
+ if (curr == SEQ_NO_VCC_TOKEN)
+ return NULL;
+
+ curr = curr->next;
+
+ return curr;
+}
+
+static void *clip_seq_vcc_walk(struct clip_seq_state *state,
+ struct atmarp_entry *e, loff_t * pos)
+{
+ struct clip_vcc *vcc = state->vcc;
+
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (vcc && pos != NULL) {
+ while (*pos) {
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (!vcc)
+ break;
+ --(*pos);
+ }
+ }
+ state->vcc = vcc;
+
+ return vcc;
+}
+
+static void *clip_seq_sub_iter(struct neigh_seq_state *_state,
+ struct neighbour *n, loff_t * pos)
+{
+ struct clip_seq_state *state = (struct clip_seq_state *)_state;
+
+ if (n->dev->type != ARPHRD_ATM)
+ return NULL;
+
+ return clip_seq_vcc_walk(state, neighbour_priv(n), pos);
+}
+
+static void *clip_seq_start(struct seq_file *seq, loff_t * pos)
+{
+ struct clip_seq_state *state = seq->private;
+ state->ns.neigh_sub_iter = clip_seq_sub_iter;
+ return neigh_seq_start(seq, pos, &arp_tbl, NEIGH_SEQ_NEIGH_ONLY);
+}
+
+static int clip_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_arp_banner[] =
+ "IPitf TypeEncp Idle IP address ATM address\n";
+
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(seq, atm_arp_banner);
+ } else {
+ struct clip_seq_state *state = seq->private;
+ struct clip_vcc *vcc = state->vcc;
+ struct neighbour *n = v;
+
+ atmarp_info(seq, n, neighbour_priv(n), vcc);
+ }
+ return 0;
+}
+
+static const struct seq_operations arp_seq_ops = {
+ .start = clip_seq_start,
+ .next = neigh_seq_next,
+ .stop = neigh_seq_stop,
+ .show = clip_seq_show,
+};
+#endif
+
+static void atm_clip_exit_noproc(void);
+
+static int __init atm_clip_init(void)
+{
+ register_atm_ioctl(&clip_ioctl_ops);
+ register_netdevice_notifier(&clip_dev_notifier);
+ register_inetaddr_notifier(&clip_inet_notifier);
+
+ timer_setup(&idle_timer, idle_timer_check, 0);
+
+#ifdef CONFIG_PROC_FS
+ {
+ struct proc_dir_entry *p;
+
+ p = proc_create_net("arp", 0444, atm_proc_root, &arp_seq_ops,
+ sizeof(struct clip_seq_state));
+ if (!p) {
+ pr_err("Unable to initialize /proc/net/atm/arp\n");
+ atm_clip_exit_noproc();
+ return -ENOMEM;
+ }
+ }
+#endif
+
+ return 0;
+}
+
+static void atm_clip_exit_noproc(void)
+{
+ struct net_device *dev, *next;
+
+ unregister_inetaddr_notifier(&clip_inet_notifier);
+ unregister_netdevice_notifier(&clip_dev_notifier);
+
+ deregister_atm_ioctl(&clip_ioctl_ops);
+
+ /* First, stop the idle timer, so it stops banging
+ * on the table.
+ */
+ del_timer_sync(&idle_timer);
+
+ dev = clip_devs;
+ while (dev) {
+ next = PRIV(dev)->next;
+ unregister_netdev(dev);
+ free_netdev(dev);
+ dev = next;
+ }
+}
+
+static void __exit atm_clip_exit(void)
+{
+ remove_proc_entry("arp", atm_proc_root);
+
+ atm_clip_exit_noproc();
+}
+
+module_init(atm_clip_init);
+module_exit(atm_clip_exit);
+MODULE_AUTHOR("Werner Almesberger");
+MODULE_DESCRIPTION("Classical/IP over ATM interface");
+MODULE_LICENSE("GPL");
diff --git a/net/atm/common.c b/net/atm/common.c
new file mode 100644
index 000000000..f7019df41
--- /dev/null
+++ b/net/atm/common.c
@@ -0,0 +1,895 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h>
+#include <linux/socket.h> /* SOL_SOCKET */
+#include <linux/errno.h> /* error codes */
+#include <linux/capability.h>
+#include <linux/mm.h>
+#include <linux/sched/signal.h>
+#include <linux/time64.h> /* 64-bit time for seconds */
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <net/sock.h> /* struct sock */
+#include <linux/uaccess.h>
+#include <linux/poll.h>
+
+#include <linux/atomic.h>
+
+#include "resources.h" /* atm_find_dev */
+#include "common.h" /* prototypes */
+#include "protocols.h" /* atm_init_<transport> */
+#include "addr.h" /* address registry */
+#include "signaling.h" /* for WAITING and sigd_attach */
+
+struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
+EXPORT_SYMBOL(vcc_hash);
+
+DEFINE_RWLOCK(vcc_sklist_lock);
+EXPORT_SYMBOL(vcc_sklist_lock);
+
+static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain);
+
+static void __vcc_insert_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)];
+ sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1);
+ sk_add_node(sk, head);
+}
+
+void vcc_insert_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+EXPORT_SYMBOL(vcc_insert_socket);
+
+static void vcc_remove_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ sk_del_node_init(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+
+static bool vcc_tx_ready(struct atm_vcc *vcc, unsigned int size)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) {
+ pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
+ sk_wmem_alloc_get(sk), size, sk->sk_sndbuf);
+ return false;
+ }
+ return true;
+}
+
+static void vcc_sock_destruct(struct sock *sk)
+{
+ if (atomic_read(&sk->sk_rmem_alloc))
+ printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n",
+ __func__, atomic_read(&sk->sk_rmem_alloc));
+
+ if (refcount_read(&sk->sk_wmem_alloc))
+ printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n",
+ __func__, refcount_read(&sk->sk_wmem_alloc));
+}
+
+static void vcc_def_wakeup(struct sock *sk)
+{
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (skwq_has_sleeper(wq))
+ wake_up(&wq->wait);
+ rcu_read_unlock();
+}
+
+static inline int vcc_writable(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+
+ return (vcc->qos.txtp.max_sdu +
+ refcount_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
+}
+
+static void vcc_write_space(struct sock *sk)
+{
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+
+ if (vcc_writable(sk)) {
+ wq = rcu_dereference(sk->sk_wq);
+ if (skwq_has_sleeper(wq))
+ wake_up_interruptible(&wq->wait);
+
+ sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
+ }
+
+ rcu_read_unlock();
+}
+
+static void vcc_release_cb(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+
+ if (vcc->release_cb)
+ vcc->release_cb(vcc);
+}
+
+static struct proto vcc_proto = {
+ .name = "VCC",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct atm_vcc),
+ .release_cb = vcc_release_cb,
+};
+
+int vcc_create(struct net *net, struct socket *sock, int protocol, int family, int kern)
+{
+ struct sock *sk;
+ struct atm_vcc *vcc;
+
+ sock->sk = NULL;
+ if (sock->type == SOCK_STREAM)
+ return -EINVAL;
+ sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto, kern);
+ if (!sk)
+ return -ENOMEM;
+ sock_init_data(sock, sk);
+ sk->sk_state_change = vcc_def_wakeup;
+ sk->sk_write_space = vcc_write_space;
+
+ vcc = atm_sk(sk);
+ vcc->dev = NULL;
+ memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc));
+ memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc));
+ vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
+ refcount_set(&sk->sk_wmem_alloc, 1);
+ atomic_set(&sk->sk_rmem_alloc, 0);
+ vcc->push = NULL;
+ vcc->pop = NULL;
+ vcc->owner = NULL;
+ vcc->push_oam = NULL;
+ vcc->release_cb = NULL;
+ vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
+ vcc->atm_options = vcc->aal_options = 0;
+ sk->sk_destruct = vcc_sock_destruct;
+ return 0;
+}
+
+static void vcc_destroy_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct sk_buff *skb;
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ if (vcc->dev && vcc->dev->ops->close)
+ vcc->dev->ops->close(vcc);
+ if (vcc->push)
+ vcc->push(vcc, NULL); /* atmarpd has no push */
+ module_put(vcc->owner);
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ kfree_skb(skb);
+ }
+
+ if (vcc->dev && vcc->dev->ops->owner) {
+ module_put(vcc->dev->ops->owner);
+ atm_dev_put(vcc->dev);
+ }
+
+ vcc_remove_socket(sk);
+}
+
+int vcc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (sk) {
+ lock_sock(sk);
+ vcc_destroy_socket(sock->sk);
+ release_sock(sk);
+ sock_put(sk);
+ }
+
+ return 0;
+}
+
+void vcc_release_async(struct atm_vcc *vcc, int reply)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ sk->sk_shutdown |= RCV_SHUTDOWN;
+ sk->sk_err = -reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ sk->sk_state_change(sk);
+}
+EXPORT_SYMBOL(vcc_release_async);
+
+void vcc_process_recv_queue(struct atm_vcc *vcc)
+{
+ struct sk_buff_head queue, *rq;
+ struct sk_buff *skb, *tmp;
+ unsigned long flags;
+
+ __skb_queue_head_init(&queue);
+ rq = &sk_atm(vcc)->sk_receive_queue;
+
+ spin_lock_irqsave(&rq->lock, flags);
+ skb_queue_splice_init(rq, &queue);
+ spin_unlock_irqrestore(&rq->lock, flags);
+
+ skb_queue_walk_safe(&queue, skb, tmp) {
+ __skb_unlink(skb, &queue);
+ vcc->push(vcc, skb);
+ }
+}
+EXPORT_SYMBOL(vcc_process_recv_queue);
+
+void atm_dev_signal_change(struct atm_dev *dev, char signal)
+{
+ pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
+ __func__, signal, dev, dev->number, dev->signal);
+
+ /* atm driver sending invalid signal */
+ WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
+
+ if (dev->signal == signal)
+ return; /* no change */
+
+ dev->signal = signal;
+
+ atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
+}
+EXPORT_SYMBOL(atm_dev_signal_change);
+
+void atm_dev_release_vccs(struct atm_dev *dev)
+{
+ int i;
+
+ write_lock_irq(&vcc_sklist_lock);
+ for (i = 0; i < VCC_HTABLE_SIZE; i++) {
+ struct hlist_head *head = &vcc_hash[i];
+ struct hlist_node *tmp;
+ struct sock *s;
+ struct atm_vcc *vcc;
+
+ sk_for_each_safe(s, tmp, head) {
+ vcc = atm_sk(s);
+ if (vcc->dev == dev) {
+ vcc_release_async(vcc, -EPIPE);
+ sk_del_node_init(s);
+ }
+ }
+ }
+ write_unlock_irq(&vcc_sklist_lock);
+}
+EXPORT_SYMBOL(atm_dev_release_vccs);
+
+static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
+{
+ int max_sdu;
+
+ if (!tp->traffic_class)
+ return 0;
+ switch (aal) {
+ case ATM_AAL0:
+ max_sdu = ATM_CELL_SIZE-1;
+ break;
+ case ATM_AAL34:
+ max_sdu = ATM_MAX_AAL34_PDU;
+ break;
+ default:
+ pr_warn("AAL problems ... (%d)\n", aal);
+ fallthrough;
+ case ATM_AAL5:
+ max_sdu = ATM_MAX_AAL5_PDU;
+ }
+ if (!tp->max_sdu)
+ tp->max_sdu = max_sdu;
+ else if (tp->max_sdu > max_sdu)
+ return -EINVAL;
+ if (!tp->max_cdv)
+ tp->max_cdv = ATM_MAX_CDV;
+ return 0;
+}
+
+static int check_ci(const struct atm_vcc *vcc, short vpi, int vci)
+{
+ struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)];
+ struct sock *s;
+ struct atm_vcc *walk;
+
+ sk_for_each(s, head) {
+ walk = atm_sk(s);
+ if (walk->dev != vcc->dev)
+ continue;
+ if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
+ walk->vci == vci && ((walk->qos.txtp.traffic_class !=
+ ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
+ (walk->qos.rxtp.traffic_class != ATM_NONE &&
+ vcc->qos.rxtp.traffic_class != ATM_NONE)))
+ return -EADDRINUSE;
+ }
+
+ /* allow VCCs with same VPI/VCI iff they don't collide on
+ TX/RX (but we may refuse such sharing for other reasons,
+ e.g. if protocol requires to have both channels) */
+
+ return 0;
+}
+
+static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci)
+{
+ static short p; /* poor man's per-device cache */
+ static int c;
+ short old_p;
+ int old_c;
+ int err;
+
+ if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
+ err = check_ci(vcc, *vpi, *vci);
+ return err;
+ }
+ /* last scan may have left values out of bounds for current device */
+ if (*vpi != ATM_VPI_ANY)
+ p = *vpi;
+ else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
+ p = 0;
+ if (*vci != ATM_VCI_ANY)
+ c = *vci;
+ else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ old_p = p;
+ old_c = c;
+ do {
+ if (!check_ci(vcc, p, c)) {
+ *vpi = p;
+ *vci = c;
+ return 0;
+ }
+ if (*vci == ATM_VCI_ANY) {
+ c++;
+ if (c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ }
+ if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
+ *vpi == ATM_VPI_ANY) {
+ p++;
+ if (p >= 1 << vcc->dev->ci_range.vpi_bits)
+ p = 0;
+ }
+ } while (old_p != p || old_c != c);
+ return -EADDRINUSE;
+}
+
+static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
+ int vci)
+{
+ struct sock *sk = sk_atm(vcc);
+ int error;
+
+ if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
+ vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
+ vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
+ return -EINVAL;
+ if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
+ return -EPERM;
+ error = -ENODEV;
+ if (!try_module_get(dev->ops->owner))
+ return error;
+ vcc->dev = dev;
+ write_lock_irq(&vcc_sklist_lock);
+ if (test_bit(ATM_DF_REMOVED, &dev->flags) ||
+ (error = find_ci(vcc, &vpi, &vci))) {
+ write_unlock_irq(&vcc_sklist_lock);
+ goto fail_module_put;
+ }
+ vcc->vpi = vpi;
+ vcc->vci = vci;
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+ switch (vcc->qos.aal) {
+ case ATM_AAL0:
+ error = atm_init_aal0(vcc);
+ vcc->stats = &dev->stats.aal0;
+ break;
+ case ATM_AAL34:
+ error = atm_init_aal34(vcc);
+ vcc->stats = &dev->stats.aal34;
+ break;
+ case ATM_NO_AAL:
+ /* ATM_AAL5 is also used in the "0 for default" case */
+ vcc->qos.aal = ATM_AAL5;
+ fallthrough;
+ case ATM_AAL5:
+ error = atm_init_aal5(vcc);
+ vcc->stats = &dev->stats.aal5;
+ break;
+ default:
+ error = -EPROTOTYPE;
+ }
+ if (!error)
+ error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal);
+ if (!error)
+ error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal);
+ if (error)
+ goto fail;
+ pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal);
+ pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",
+ vcc->qos.txtp.traffic_class,
+ vcc->qos.txtp.min_pcr,
+ vcc->qos.txtp.max_pcr,
+ vcc->qos.txtp.max_sdu);
+ pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",
+ vcc->qos.rxtp.traffic_class,
+ vcc->qos.rxtp.min_pcr,
+ vcc->qos.rxtp.max_pcr,
+ vcc->qos.rxtp.max_sdu);
+
+ if (dev->ops->open) {
+ error = dev->ops->open(vcc);
+ if (error)
+ goto fail;
+ }
+ return 0;
+
+fail:
+ vcc_remove_socket(sk);
+fail_module_put:
+ module_put(dev->ops->owner);
+ /* ensure we get dev module ref count correct */
+ vcc->dev = NULL;
+ return error;
+}
+
+int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
+{
+ struct atm_dev *dev;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ pr_debug("(vpi %d, vci %d)\n", vpi, vci);
+ if (sock->state == SS_CONNECTED)
+ return -EISCONN;
+ if (sock->state != SS_UNCONNECTED)
+ return -EINVAL;
+ if (!(vpi || vci))
+ return -EINVAL;
+
+ if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
+ clear_bit(ATM_VF_PARTIAL, &vcc->flags);
+ else
+ if (test_bit(ATM_VF_PARTIAL, &vcc->flags))
+ return -EINVAL;
+ pr_debug("(TX: cl %d,bw %d-%d,sdu %d; "
+ "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
+ vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr,
+ vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu,
+ vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr,
+ vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu,
+ vcc->qos.aal == ATM_AAL5 ? "" :
+ vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ",
+ vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
+ return -EBADFD;
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
+ return -EINVAL;
+ if (likely(itf != ATM_ITF_ANY)) {
+ dev = try_then_request_module(atm_dev_lookup(itf),
+ "atm-device-%d", itf);
+ } else {
+ dev = NULL;
+ mutex_lock(&atm_dev_mutex);
+ if (!list_empty(&atm_devs)) {
+ dev = list_entry(atm_devs.next,
+ struct atm_dev, dev_list);
+ atm_dev_hold(dev);
+ }
+ mutex_unlock(&atm_dev_mutex);
+ }
+ if (!dev)
+ return -ENODEV;
+ error = __vcc_connect(vcc, dev, vpi, vci);
+ if (error) {
+ atm_dev_put(dev);
+ return error;
+ }
+ if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
+ set_bit(ATM_VF_PARTIAL, &vcc->flags);
+ if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags))
+ sock->state = SS_CONNECTED;
+ return 0;
+}
+
+int vcc_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+ int flags)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int copied, error = -EINVAL;
+
+ if (sock->state != SS_CONNECTED)
+ return -ENOTCONN;
+
+ /* only handle MSG_DONTWAIT and MSG_PEEK */
+ if (flags & ~(MSG_DONTWAIT | MSG_PEEK))
+ return -EOPNOTSUPP;
+
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags))
+ return 0;
+
+ skb = skb_recv_datagram(sk, flags, &error);
+ if (!skb)
+ return error;
+
+ copied = skb->len;
+ if (copied > size) {
+ copied = size;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ error = skb_copy_datagram_msg(skb, 0, msg, copied);
+ if (error)
+ return error;
+ sock_recv_cmsgs(msg, sk, skb);
+
+ if (!(flags & MSG_PEEK)) {
+ pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc),
+ skb->truesize);
+ atm_return(vcc, skb->truesize);
+ }
+
+ skb_free_datagram(sk, skb);
+ return copied;
+}
+
+int vcc_sendmsg(struct socket *sock, struct msghdr *m, size_t size)
+{
+ struct sock *sk = sock->sk;
+ DEFINE_WAIT(wait);
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int eff, error;
+
+ lock_sock(sk);
+ if (sock->state != SS_CONNECTED) {
+ error = -ENOTCONN;
+ goto out;
+ }
+ if (m->msg_name) {
+ error = -EISCONN;
+ goto out;
+ }
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ goto out;
+ }
+ if (!size) {
+ error = 0;
+ goto out;
+ }
+ if (size > vcc->qos.txtp.max_sdu) {
+ error = -EMSGSIZE;
+ goto out;
+ }
+
+ eff = (size+3) & ~3; /* align to word boundary */
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ error = 0;
+ while (!vcc_tx_ready(vcc, eff)) {
+ if (m->msg_flags & MSG_DONTWAIT) {
+ error = -EAGAIN;
+ break;
+ }
+ schedule();
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ break;
+ }
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (error)
+ goto out;
+
+ skb = alloc_skb(eff, GFP_KERNEL);
+ if (!skb) {
+ error = -ENOMEM;
+ goto out;
+ }
+ pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize);
+ atm_account_tx(vcc, skb);
+
+ skb->dev = NULL; /* for paths shared with net_device interfaces */
+ if (!copy_from_iter_full(skb_put(skb, size), size, &m->msg_iter)) {
+ kfree_skb(skb);
+ error = -EFAULT;
+ goto out;
+ }
+ if (eff != size)
+ memset(skb->data + size, 0, eff-size);
+ error = vcc->dev->ops->send(vcc, skb);
+ error = error ? error : size;
+out:
+ release_sock(sk);
+ return error;
+}
+
+__poll_t vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ __poll_t mask;
+
+ sock_poll_wait(file, sock, wait);
+ mask = 0;
+
+ vcc = ATM_SD(sock);
+
+ /* exceptional events */
+ if (sk->sk_err)
+ mask = EPOLLERR;
+
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags))
+ mask |= EPOLLHUP;
+
+ /* readable? */
+ if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
+ mask |= EPOLLIN | EPOLLRDNORM;
+
+ /* writable? */
+ if (sock->state == SS_CONNECTING &&
+ test_bit(ATM_VF_WAITING, &vcc->flags))
+ return mask;
+
+ if (vcc->qos.txtp.traffic_class != ATM_NONE &&
+ vcc_writable(sk))
+ mask |= EPOLLOUT | EPOLLWRNORM | EPOLLWRBAND;
+
+ return mask;
+}
+
+static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
+{
+ int error;
+
+ /*
+ * Don't let the QoS change the already connected AAL type nor the
+ * traffic class.
+ */
+ if (qos->aal != vcc->qos.aal ||
+ qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
+ qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
+ return -EINVAL;
+ error = adjust_tp(&qos->txtp, qos->aal);
+ if (!error)
+ error = adjust_tp(&qos->rxtp, qos->aal);
+ if (error)
+ return error;
+ if (!vcc->dev->ops->change_qos)
+ return -EOPNOTSUPP;
+ if (sk_atm(vcc)->sk_family == AF_ATMPVC)
+ return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET);
+ return svc_change_qos(vcc, qos);
+}
+
+static int check_tp(const struct atm_trafprm *tp)
+{
+ /* @@@ Should be merged with adjust_tp */
+ if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS)
+ return 0;
+ if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
+ !tp->max_pcr)
+ return -EINVAL;
+ if (tp->min_pcr == ATM_MAX_PCR)
+ return -EINVAL;
+ if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
+ tp->min_pcr > tp->max_pcr)
+ return -EINVAL;
+ /*
+ * We allow pcr to be outside [min_pcr,max_pcr], because later
+ * adjustment may still push it in the valid range.
+ */
+ return 0;
+}
+
+static int check_qos(const struct atm_qos *qos)
+{
+ int error;
+
+ if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
+ return -EINVAL;
+ if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class && qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class != ATM_ANYCLASS &&
+ qos->rxtp.traffic_class != ATM_ANYCLASS)
+ return -EINVAL;
+ error = check_tp(&qos->txtp);
+ if (error)
+ return error;
+ return check_tp(&qos->rxtp);
+}
+
+int vcc_setsockopt(struct socket *sock, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
+{
+ struct atm_vcc *vcc;
+ unsigned long value;
+ int error;
+
+ if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ {
+ struct atm_qos qos;
+
+ if (copy_from_sockptr(&qos, optval, sizeof(qos)))
+ return -EFAULT;
+ error = check_qos(&qos);
+ if (error)
+ return error;
+ if (sock->state == SS_CONNECTED)
+ return atm_change_qos(vcc, &qos);
+ if (sock->state != SS_UNCONNECTED)
+ return -EBADFD;
+ vcc->qos = qos;
+ set_bit(ATM_VF_HASQOS, &vcc->flags);
+ return 0;
+ }
+ case SO_SETCLP:
+ if (copy_from_sockptr(&value, optval, sizeof(value)))
+ return -EFAULT;
+ if (value)
+ vcc->atm_options |= ATM_ATMOPT_CLP;
+ else
+ vcc->atm_options &= ~ATM_ATMOPT_CLP;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+int vcc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct atm_vcc *vcc;
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
+ return -EINVAL;
+ return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos))
+ ? -EFAULT : 0;
+ case SO_SETCLP:
+ return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0,
+ (unsigned long __user *)optval) ? -EFAULT : 0;
+ case SO_ATMPVC:
+ {
+ struct sockaddr_atmpvc pvc;
+
+ if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
+ return -ENOTCONN;
+ memset(&pvc, 0, sizeof(pvc));
+ pvc.sap_family = AF_ATMPVC;
+ pvc.sap_addr.itf = vcc->dev->number;
+ pvc.sap_addr.vpi = vcc->vpi;
+ pvc.sap_addr.vci = vcc->vci;
+ return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+int register_atmdevice_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&atm_dev_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(register_atmdevice_notifier);
+
+void unregister_atmdevice_notifier(struct notifier_block *nb)
+{
+ atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier);
+
+static int __init atm_init(void)
+{
+ int error;
+
+ error = proto_register(&vcc_proto, 0);
+ if (error < 0)
+ goto out;
+ error = atmpvc_init();
+ if (error < 0) {
+ pr_err("atmpvc_init() failed with %d\n", error);
+ goto out_unregister_vcc_proto;
+ }
+ error = atmsvc_init();
+ if (error < 0) {
+ pr_err("atmsvc_init() failed with %d\n", error);
+ goto out_atmpvc_exit;
+ }
+ error = atm_proc_init();
+ if (error < 0) {
+ pr_err("atm_proc_init() failed with %d\n", error);
+ goto out_atmsvc_exit;
+ }
+ error = atm_sysfs_init();
+ if (error < 0) {
+ pr_err("atm_sysfs_init() failed with %d\n", error);
+ goto out_atmproc_exit;
+ }
+out:
+ return error;
+out_atmproc_exit:
+ atm_proc_exit();
+out_atmsvc_exit:
+ atmsvc_exit();
+out_atmpvc_exit:
+ atmsvc_exit();
+out_unregister_vcc_proto:
+ proto_unregister(&vcc_proto);
+ goto out;
+}
+
+static void __exit atm_exit(void)
+{
+ atm_proc_exit();
+ atm_sysfs_exit();
+ atmsvc_exit();
+ atmpvc_exit();
+ proto_unregister(&vcc_proto);
+}
+
+subsys_initcall(atm_init);
+
+module_exit(atm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_ATMPVC);
+MODULE_ALIAS_NETPROTO(PF_ATMSVC);
diff --git a/net/atm/common.h b/net/atm/common.h
new file mode 100644
index 000000000..a1e56e8de
--- /dev/null
+++ b/net/atm/common.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* net/atm/common.h - ATM sockets (common part for PVC and SVC) */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_COMMON_H
+#define NET_ATM_COMMON_H
+
+#include <linux/net.h>
+#include <linux/poll.h> /* for poll_table */
+
+
+int vcc_create(struct net *net, struct socket *sock, int protocol, int family, int kern);
+int vcc_release(struct socket *sock);
+int vcc_connect(struct socket *sock, int itf, short vpi, int vci);
+int vcc_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+ int flags);
+int vcc_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len);
+__poll_t vcc_poll(struct file *file, struct socket *sock, poll_table *wait);
+int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+int vcc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+int vcc_setsockopt(struct socket *sock, int level, int optname,
+ sockptr_t optval, unsigned int optlen);
+int vcc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen);
+void vcc_process_recv_queue(struct atm_vcc *vcc);
+
+int atmpvc_init(void);
+void atmpvc_exit(void);
+int atmsvc_init(void);
+void atmsvc_exit(void);
+int atm_sysfs_init(void);
+void atm_sysfs_exit(void);
+
+#ifdef CONFIG_PROC_FS
+int atm_proc_init(void);
+void atm_proc_exit(void);
+#else
+static inline int atm_proc_init(void)
+{
+ return 0;
+}
+
+static inline void atm_proc_exit(void)
+{
+ /* nothing */
+}
+#endif /* CONFIG_PROC_FS */
+
+/* SVC */
+int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos);
+
+void atm_dev_release_vccs(struct atm_dev *dev);
+
+#endif
diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c
new file mode 100644
index 000000000..f81f8d56f
--- /dev/null
+++ b/net/atm/ioctl.c
@@ -0,0 +1,365 @@
+// SPDX-License-Identifier: GPL-2.0
+/* ATM ioctl handling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+/* 2003 John Levon <levon@movementarian.org> */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h>
+#include <linux/atmclip.h> /* CLIP_*ENCAP */
+#include <linux/atmarp.h> /* manifest constants */
+#include <linux/capability.h>
+#include <linux/sonet.h> /* for ioctls */
+#include <linux/atmsvc.h>
+#include <linux/atmmpc.h>
+#include <net/atmclip.h>
+#include <linux/atmlec.h>
+#include <linux/mutex.h>
+#include <asm/ioctls.h>
+#include <net/compat.h>
+
+#include "resources.h"
+#include "signaling.h" /* for WAITING and sigd_attach */
+#include "common.h"
+
+
+static DEFINE_MUTEX(ioctl_mutex);
+static LIST_HEAD(ioctl_list);
+
+
+void register_atm_ioctl(struct atm_ioctl *ioctl)
+{
+ mutex_lock(&ioctl_mutex);
+ list_add_tail(&ioctl->list, &ioctl_list);
+ mutex_unlock(&ioctl_mutex);
+}
+EXPORT_SYMBOL(register_atm_ioctl);
+
+void deregister_atm_ioctl(struct atm_ioctl *ioctl)
+{
+ mutex_lock(&ioctl_mutex);
+ list_del(&ioctl->list);
+ mutex_unlock(&ioctl_mutex);
+}
+EXPORT_SYMBOL(deregister_atm_ioctl);
+
+static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg, int compat)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ int error;
+ struct list_head *pos;
+ void __user *argp = (void __user *)arg;
+ void __user *buf;
+ int __user *len;
+
+ vcc = ATM_SD(sock);
+ switch (cmd) {
+ case SIOCOUTQ:
+ if (sock->state != SS_CONNECTED ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EINVAL;
+ goto done;
+ }
+ error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
+ (int __user *)argp) ? -EFAULT : 0;
+ goto done;
+ case SIOCINQ:
+ {
+ struct sk_buff *skb;
+ int amount;
+
+ if (sock->state != SS_CONNECTED) {
+ error = -EINVAL;
+ goto done;
+ }
+ spin_lock_irq(&sk->sk_receive_queue.lock);
+ skb = skb_peek(&sk->sk_receive_queue);
+ amount = skb ? skb->len : 0;
+ spin_unlock_irq(&sk->sk_receive_queue.lock);
+ error = put_user(amount, (int __user *)argp) ? -EFAULT : 0;
+ goto done;
+ }
+ case ATM_SETSC:
+ net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",
+ current->comm, task_pid_nr(current));
+ error = 0;
+ goto done;
+ case ATMSIGD_CTRL:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ /*
+ * The user/kernel protocol for exchanging signalling
+ * info uses kernel pointers as opaque references,
+ * so the holder of the file descriptor can scribble
+ * on the kernel... so we should make sure that we
+ * have the same privileges that /proc/kcore needs
+ */
+ if (!capable(CAP_SYS_RAWIO)) {
+ error = -EPERM;
+ goto done;
+ }
+#ifdef CONFIG_COMPAT
+ /* WTF? I don't even want to _think_ about making this
+ work for 32-bit userspace. TBH I don't really want
+ to think about it at all. dwmw2. */
+ if (compat) {
+ net_warn_ratelimited("32-bit task cannot be atmsigd\n");
+ error = -EINVAL;
+ goto done;
+ }
+#endif
+ error = sigd_attach(vcc);
+ if (!error)
+ sock->state = SS_CONNECTED;
+ goto done;
+ case ATM_SETBACKEND:
+ case ATM_NEWBACKENDIF:
+ {
+ atm_backend_t backend;
+ error = get_user(backend, (atm_backend_t __user *)argp);
+ if (error)
+ goto done;
+ switch (backend) {
+ case ATM_BACKEND_PPP:
+ request_module("pppoatm");
+ break;
+ case ATM_BACKEND_BR2684:
+ request_module("br2684");
+ break;
+ }
+ break;
+ }
+ case ATMMPC_CTRL:
+ case ATMMPC_DATA:
+ request_module("mpoa");
+ break;
+ case ATMARPD_CTRL:
+ request_module("clip");
+ break;
+ case ATMLEC_CTRL:
+ request_module("lec");
+ break;
+ }
+
+ error = -ENOIOCTLCMD;
+
+ mutex_lock(&ioctl_mutex);
+ list_for_each(pos, &ioctl_list) {
+ struct atm_ioctl *ic = list_entry(pos, struct atm_ioctl, list);
+ if (try_module_get(ic->owner)) {
+ error = ic->ioctl(sock, cmd, arg);
+ module_put(ic->owner);
+ if (error != -ENOIOCTLCMD)
+ break;
+ }
+ }
+ mutex_unlock(&ioctl_mutex);
+
+ if (error != -ENOIOCTLCMD)
+ goto done;
+
+ if (cmd == ATM_GETNAMES) {
+ if (IS_ENABLED(CONFIG_COMPAT) && compat) {
+#ifdef CONFIG_COMPAT
+ struct compat_atm_iobuf __user *ciobuf = argp;
+ compat_uptr_t cbuf;
+ len = &ciobuf->length;
+ if (get_user(cbuf, &ciobuf->buffer))
+ return -EFAULT;
+ buf = compat_ptr(cbuf);
+#endif
+ } else {
+ struct atm_iobuf __user *iobuf = argp;
+ len = &iobuf->length;
+ if (get_user(buf, &iobuf->buffer))
+ return -EFAULT;
+ }
+ error = atm_getnames(buf, len);
+ } else {
+ int number;
+
+ if (IS_ENABLED(CONFIG_COMPAT) && compat) {
+#ifdef CONFIG_COMPAT
+ struct compat_atmif_sioc __user *csioc = argp;
+ compat_uptr_t carg;
+
+ len = &csioc->length;
+ if (get_user(carg, &csioc->arg))
+ return -EFAULT;
+ buf = compat_ptr(carg);
+ if (get_user(number, &csioc->number))
+ return -EFAULT;
+#endif
+ } else {
+ struct atmif_sioc __user *sioc = argp;
+
+ len = &sioc->length;
+ if (get_user(buf, &sioc->arg))
+ return -EFAULT;
+ if (get_user(number, &sioc->number))
+ return -EFAULT;
+ }
+ error = atm_dev_ioctl(cmd, buf, len, number, compat);
+ }
+
+done:
+ return error;
+}
+
+int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ return do_vcc_ioctl(sock, cmd, arg, 0);
+}
+
+#ifdef CONFIG_COMPAT
+/*
+ * FIXME:
+ * The compat_ioctl handling is duplicated, using both these conversion
+ * routines and the compat argument to the actual handlers. Both
+ * versions are somewhat incomplete and should be merged, e.g. by
+ * moving the ioctl number translation into the actual handlers and
+ * killing the conversion code.
+ *
+ * -arnd, November 2009
+ */
+#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
+#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
+#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
+#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
+#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
+#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
+#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
+#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
+#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
+#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
+#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
+#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
+#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
+#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
+#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
+#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
+#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
+
+static struct {
+ unsigned int cmd32;
+ unsigned int cmd;
+} atm_ioctl_map[] = {
+ { ATM_GETLINKRATE32, ATM_GETLINKRATE },
+ { ATM_GETNAMES32, ATM_GETNAMES },
+ { ATM_GETTYPE32, ATM_GETTYPE },
+ { ATM_GETESI32, ATM_GETESI },
+ { ATM_GETADDR32, ATM_GETADDR },
+ { ATM_RSTADDR32, ATM_RSTADDR },
+ { ATM_ADDADDR32, ATM_ADDADDR },
+ { ATM_DELADDR32, ATM_DELADDR },
+ { ATM_GETCIRANGE32, ATM_GETCIRANGE },
+ { ATM_SETCIRANGE32, ATM_SETCIRANGE },
+ { ATM_SETESI32, ATM_SETESI },
+ { ATM_SETESIF32, ATM_SETESIF },
+ { ATM_GETSTAT32, ATM_GETSTAT },
+ { ATM_GETSTATZ32, ATM_GETSTATZ },
+ { ATM_GETLOOP32, ATM_GETLOOP },
+ { ATM_SETLOOP32, ATM_SETLOOP },
+ { ATM_QUERYLOOP32, ATM_QUERYLOOP },
+};
+
+#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
+
+static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct compat_atm_iobuf __user *iobuf32 = compat_ptr(arg);
+ u32 data;
+
+ if (get_user(data, &iobuf32->buffer))
+ return -EFAULT;
+
+ return atm_getnames(&iobuf32->length, compat_ptr(data));
+}
+
+static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct compat_atmif_sioc __user *sioc32 = compat_ptr(arg);
+ int number;
+ u32 data;
+
+ if (get_user(data, &sioc32->arg) || get_user(number, &sioc32->number))
+ return -EFAULT;
+ return atm_dev_ioctl(cmd, compat_ptr(data), &sioc32->length, number, 0);
+}
+
+static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
+ unsigned long arg)
+{
+ int i;
+ unsigned int cmd = 0;
+
+ switch (cmd32) {
+ case SONET_GETSTAT:
+ case SONET_GETSTATZ:
+ case SONET_GETDIAG:
+ case SONET_SETDIAG:
+ case SONET_CLRDIAG:
+ case SONET_SETFRAMING:
+ case SONET_GETFRAMING:
+ case SONET_GETFRSENSE:
+ return do_atmif_sioc(sock, cmd32, arg);
+ }
+
+ for (i = 0; i < NR_ATM_IOCTL; i++) {
+ if (cmd32 == atm_ioctl_map[i].cmd32) {
+ cmd = atm_ioctl_map[i].cmd;
+ break;
+ }
+ }
+ if (i == NR_ATM_IOCTL)
+ return -EINVAL;
+
+ switch (cmd) {
+ case ATM_GETNAMES:
+ return do_atm_iobuf(sock, cmd, arg);
+
+ case ATM_GETLINKRATE:
+ case ATM_GETTYPE:
+ case ATM_GETESI:
+ case ATM_GETADDR:
+ case ATM_RSTADDR:
+ case ATM_ADDADDR:
+ case ATM_DELADDR:
+ case ATM_GETCIRANGE:
+ case ATM_SETCIRANGE:
+ case ATM_SETESI:
+ case ATM_SETESIF:
+ case ATM_GETSTAT:
+ case ATM_GETSTATZ:
+ case ATM_GETLOOP:
+ case ATM_SETLOOP:
+ case ATM_QUERYLOOP:
+ return do_atmif_sioc(sock, cmd, arg);
+ }
+
+ return -EINVAL;
+}
+
+int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret;
+
+ ret = do_vcc_ioctl(sock, cmd, arg, 1);
+ if (ret != -ENOIOCTLCMD)
+ return ret;
+
+ return do_atm_ioctl(sock, cmd, arg);
+}
+#endif
diff --git a/net/atm/lec.c b/net/atm/lec.c
new file mode 100644
index 000000000..6257bf12e
--- /dev/null
+++ b/net/atm/lec.c
@@ -0,0 +1,2237 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * lec.c: Lan Emulation driver
+ *
+ * Marko Kiiskila <mkiiskila@yahoo.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/capability.h>
+
+/* We are ethernet device */
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <net/arp.h>
+#include <net/dst.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/seq_file.h>
+
+/* And atm device */
+#include <linux/atmdev.h>
+#include <linux/atmlec.h>
+
+/* Proxy LEC knows about bridging */
+#if IS_ENABLED(CONFIG_BRIDGE)
+#include "../bridge/br_private.h"
+
+static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
+#endif
+
+/* Modular too */
+#include <linux/module.h>
+#include <linux/init.h>
+
+/* Hardening for Spectre-v1 */
+#include <linux/nospec.h>
+
+#include "lec.h"
+#include "lec_arpc.h"
+#include "resources.h"
+
+#define DUMP_PACKETS 0 /*
+ * 0 = None,
+ * 1 = 30 first bytes
+ * 2 = Whole packet
+ */
+
+#define LEC_UNRES_QUE_LEN 8 /*
+ * number of tx packets to queue for a
+ * single destination while waiting for SVC
+ */
+
+static int lec_open(struct net_device *dev);
+static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
+ struct net_device *dev);
+static int lec_close(struct net_device *dev);
+static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
+ const unsigned char *mac_addr);
+static int lec_arp_remove(struct lec_priv *priv,
+ struct lec_arp_table *to_remove);
+/* LANE2 functions */
+static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address,
+ const u8 *tlvs, u32 sizeoftlvs);
+static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs);
+static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
+ const u8 *tlvs, u32 sizeoftlvs);
+
+static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
+ unsigned long permanent);
+static void lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb);
+static void lec_arp_destroy(struct lec_priv *priv);
+static void lec_arp_init(struct lec_priv *priv);
+static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
+ const unsigned char *mac_to_find,
+ int is_rdesc,
+ struct lec_arp_table **ret_entry);
+static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
+ const unsigned char *atm_addr,
+ unsigned long remoteflag,
+ unsigned int targetless_le_arp);
+static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
+static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
+static void lec_set_flush_tran_id(struct lec_priv *priv,
+ const unsigned char *atm_addr,
+ unsigned long tran_id);
+static void lec_vcc_added(struct lec_priv *priv,
+ const struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push)(struct atm_vcc *vcc,
+ struct sk_buff *skb));
+static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
+
+/* must be done under lec_arp_lock */
+static inline void lec_arp_hold(struct lec_arp_table *entry)
+{
+ refcount_inc(&entry->usage);
+}
+
+static inline void lec_arp_put(struct lec_arp_table *entry)
+{
+ if (refcount_dec_and_test(&entry->usage))
+ kfree(entry);
+}
+
+static struct lane2_ops lane2_ops = {
+ .resolve = lane2_resolve, /* spec 3.1.3 */
+ .associate_req = lane2_associate_req, /* spec 3.1.4 */
+ .associate_indicator = NULL /* spec 3.1.5 */
+};
+
+static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+/* Device structures */
+static struct net_device *dev_lec[MAX_LEC_ITF];
+
+#if IS_ENABLED(CONFIG_BRIDGE)
+static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
+{
+ char *buff;
+ struct lec_priv *priv;
+
+ /*
+ * Check if this is a BPDU. If so, ask zeppelin to send
+ * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
+ * as the Config BPDU has
+ */
+ buff = skb->data + skb->dev->hard_header_len;
+ if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
+ struct sock *sk;
+ struct sk_buff *skb2;
+ struct atmlec_msg *mesg;
+
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL)
+ return;
+ skb2->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb2->data;
+ mesg->type = l_topology_change;
+ buff += 4;
+ mesg->content.normal.flag = *buff & 0x01;
+ /* 0x01 is topology change */
+
+ priv = netdev_priv(dev);
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk);
+ }
+}
+#endif /* IS_ENABLED(CONFIG_BRIDGE) */
+
+/*
+ * Open/initialize the netdevice. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+
+static int lec_open(struct net_device *dev)
+{
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static void
+lec_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+
+ ATM_SKB(skb)->vcc = vcc;
+ atm_account_tx(vcc, skb);
+
+ if (vcc->send(vcc, skb) < 0) {
+ dev->stats.tx_dropped++;
+ return;
+ }
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+}
+
+static void lec_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ pr_info("%s\n", dev->name);
+ netif_trans_update(dev);
+ netif_wake_queue(dev);
+}
+
+static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct sk_buff *skb2;
+ struct lec_priv *priv = netdev_priv(dev);
+ struct lecdatahdr_8023 *lec_h;
+ struct atm_vcc *vcc;
+ struct lec_arp_table *entry;
+ unsigned char *dst;
+ int min_frame_size;
+ int is_rdesc;
+
+ pr_debug("called\n");
+ if (!priv->lecd) {
+ pr_info("%s:No lecd attached\n", dev->name);
+ dev->stats.tx_errors++;
+ netif_stop_queue(dev);
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
+ (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb),
+ (long)skb_end_pointer(skb));
+#if IS_ENABLED(CONFIG_BRIDGE)
+ if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
+ lec_handle_bridge(skb, dev);
+#endif
+
+ /* Make sure we have room for lec_id */
+ if (skb_headroom(skb) < 2) {
+ pr_debug("reallocating skb\n");
+ skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
+ if (unlikely(!skb2)) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+ consume_skb(skb);
+ skb = skb2;
+ }
+ skb_push(skb, 2);
+
+ /* Put le header to place */
+ lec_h = (struct lecdatahdr_8023 *)skb->data;
+ lec_h->le_header = htons(priv->lecid);
+
+#if DUMP_PACKETS >= 2
+#define MAX_DUMP_SKB 99
+#elif DUMP_PACKETS >= 1
+#define MAX_DUMP_SKB 30
+#endif
+#if DUMP_PACKETS >= 1
+ printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
+ dev->name, skb->len, priv->lecid);
+ print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
+ skb->data, min(skb->len, MAX_DUMP_SKB), true);
+#endif /* DUMP_PACKETS >= 1 */
+
+ /* Minimum ethernet-frame size */
+ min_frame_size = LEC_MINIMUM_8023_SIZE;
+ if (skb->len < min_frame_size) {
+ if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
+ skb2 = skb_copy_expand(skb, 0,
+ min_frame_size - skb->truesize,
+ GFP_ATOMIC);
+ dev_kfree_skb(skb);
+ if (skb2 == NULL) {
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+ skb = skb2;
+ }
+ skb_put(skb, min_frame_size - skb->len);
+ }
+
+ /* Send to right vcc */
+ is_rdesc = 0;
+ dst = lec_h->h_dest;
+ entry = NULL;
+ vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
+ pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n",
+ dev->name, vcc, vcc ? vcc->flags : 0, entry);
+ if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
+ if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
+ pr_debug("%s:queuing packet, MAC address %pM\n",
+ dev->name, lec_h->h_dest);
+ skb_queue_tail(&entry->tx_wait, skb);
+ } else {
+ pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n",
+ dev->name, lec_h->h_dest);
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ }
+ goto out;
+ }
+#if DUMP_PACKETS > 0
+ printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n",
+ dev->name, vcc->vpi, vcc->vci);
+#endif /* DUMP_PACKETS > 0 */
+
+ while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
+ pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest);
+ lec_send(vcc, skb2);
+ }
+
+ lec_send(vcc, skb);
+
+ if (!atm_may_send(vcc, 0)) {
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+
+ vpriv->xoff = 1;
+ netif_stop_queue(dev);
+
+ /*
+ * vcc->pop() might have occurred in between, making
+ * the vcc usuable again. Since xmit is serialized,
+ * this is the only situation we have to re-test.
+ */
+
+ if (atm_may_send(vcc, 0))
+ netif_wake_queue(dev);
+ }
+
+out:
+ if (entry)
+ lec_arp_put(entry);
+ netif_trans_update(dev);
+ return NETDEV_TX_OK;
+}
+
+/* The inverse routine to net_open(). */
+static int lec_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ static const u8 zero_addr[ETH_ALEN] = {};
+ unsigned long flags;
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = netdev_priv(dev);
+ struct atmlec_msg *mesg;
+ struct lec_arp_table *entry;
+ char *tmp; /* FIXME */
+
+ WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
+ mesg = (struct atmlec_msg *)skb->data;
+ tmp = skb->data;
+ tmp += sizeof(struct atmlec_msg);
+ pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
+ switch (mesg->type) {
+ case l_set_mac_addr:
+ eth_hw_addr_set(dev, mesg->content.normal.mac_addr);
+ break;
+ case l_del_mac_addr:
+ eth_hw_addr_set(dev, zero_addr);
+ break;
+ case l_addr_delete:
+ lec_addr_delete(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_topology_change:
+ priv->topology_change = mesg->content.normal.flag;
+ break;
+ case l_flush_complete:
+ lec_flush_complete(priv, mesg->content.normal.flag);
+ break;
+ case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
+ lec_arp_remove(priv, entry);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ if (mesg->content.normal.no_source_le_narp)
+ break;
+ fallthrough;
+ case l_arp_update:
+ lec_arp_update(priv, mesg->content.normal.mac_addr,
+ mesg->content.normal.atm_addr,
+ mesg->content.normal.flag,
+ mesg->content.normal.targetless_le_arp);
+ pr_debug("in l_arp_update\n");
+ if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
+ pr_debug("LANE2 3.1.5, got tlvs, size %d\n",
+ mesg->sizeoftlvs);
+ lane2_associate_ind(dev, mesg->content.normal.mac_addr,
+ tmp, mesg->sizeoftlvs);
+ }
+ break;
+ case l_config:
+ priv->maximum_unknown_frame_count =
+ mesg->content.config.maximum_unknown_frame_count;
+ priv->max_unknown_frame_time =
+ (mesg->content.config.max_unknown_frame_time * HZ);
+ priv->max_retry_count = mesg->content.config.max_retry_count;
+ priv->aging_time = (mesg->content.config.aging_time * HZ);
+ priv->forward_delay_time =
+ (mesg->content.config.forward_delay_time * HZ);
+ priv->arp_response_time =
+ (mesg->content.config.arp_response_time * HZ);
+ priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
+ priv->path_switching_delay =
+ (mesg->content.config.path_switching_delay * HZ);
+ priv->lane_version = mesg->content.config.lane_version;
+ /* LANE2 */
+ priv->lane2_ops = NULL;
+ if (priv->lane_version > 1)
+ priv->lane2_ops = &lane2_ops;
+ rtnl_lock();
+ if (dev_set_mtu(dev, mesg->content.config.mtu))
+ pr_info("%s: change_mtu to %d failed\n",
+ dev->name, mesg->content.config.mtu);
+ rtnl_unlock();
+ priv->is_proxy = mesg->content.config.is_proxy;
+ break;
+ case l_flush_tran_id:
+ lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_set_lecid:
+ priv->lecid =
+ (unsigned short)(0xffff & mesg->content.normal.flag);
+ break;
+ case l_should_bridge:
+#if IS_ENABLED(CONFIG_BRIDGE)
+ {
+ pr_debug("%s: bridge zeppelin asks about %pM\n",
+ dev->name, mesg->content.proxy.mac_addr);
+
+ if (br_fdb_test_addr_hook == NULL)
+ break;
+
+ if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
+ /* hit from bridge table, send LE_ARP_RESPONSE */
+ struct sk_buff *skb2;
+ struct sock *sk;
+
+ pr_debug("%s: entry found, responding to zeppelin\n",
+ dev->name);
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL)
+ break;
+ skb2->len = sizeof(struct atmlec_msg);
+ skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk);
+ }
+ }
+#endif /* IS_ENABLED(CONFIG_BRIDGE) */
+ break;
+ default:
+ pr_info("%s: Unknown message type %d\n", dev->name, mesg->type);
+ dev_kfree_skb(skb);
+ return -EINVAL;
+ }
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+static void lec_atm_close(struct atm_vcc *vcc)
+{
+ struct sk_buff *skb;
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = netdev_priv(dev);
+
+ priv->lecd = NULL;
+ /* Do something needful? */
+
+ netif_stop_queue(dev);
+ lec_arp_destroy(priv);
+
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ pr_info("%s closing with messages pending\n", dev->name);
+ while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
+ atm_return(vcc, skb->truesize);
+ dev_kfree_skb(skb);
+ }
+
+ pr_info("%s: Shut down!\n", dev->name);
+ module_put(THIS_MODULE);
+}
+
+static const struct atmdev_ops lecdev_ops = {
+ .close = lec_atm_close,
+ .send = lec_atm_send
+};
+
+static struct atm_dev lecatm_dev = {
+ .ops = &lecdev_ops,
+ .type = "lec",
+ .number = 999, /* dummy device number */
+ .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock)
+};
+
+/*
+ * LANE2: new argument struct sk_buff *data contains
+ * the LE_ARP based TLVs introduced in the LANE2 spec
+ */
+static int
+send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
+ const unsigned char *mac_addr, const unsigned char *atm_addr,
+ struct sk_buff *data)
+{
+ struct sock *sk;
+ struct sk_buff *skb;
+ struct atmlec_msg *mesg;
+
+ if (!priv || !priv->lecd)
+ return -1;
+ skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (!skb)
+ return -1;
+ skb->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb->data;
+ memset(mesg, 0, sizeof(struct atmlec_msg));
+ mesg->type = type;
+ if (data != NULL)
+ mesg->sizeoftlvs = data->len;
+ if (mac_addr)
+ ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
+ else
+ mesg->content.normal.targetless_le_arp = 1;
+ if (atm_addr)
+ memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
+
+ atm_force_charge(priv->lecd, skb->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+
+ if (data != NULL) {
+ pr_debug("about to send %d bytes of data\n", data->len);
+ atm_force_charge(priv->lecd, data->truesize);
+ skb_queue_tail(&sk->sk_receive_queue, data);
+ sk->sk_data_ready(sk);
+ }
+
+ return 0;
+}
+
+static void lec_set_multicast_list(struct net_device *dev)
+{
+ /*
+ * by default, all multicast frames arrive over the bus.
+ * eventually support selective multicast service
+ */
+}
+
+static const struct net_device_ops lec_netdev_ops = {
+ .ndo_open = lec_open,
+ .ndo_stop = lec_close,
+ .ndo_start_xmit = lec_start_xmit,
+ .ndo_tx_timeout = lec_tx_timeout,
+ .ndo_set_rx_mode = lec_set_multicast_list,
+};
+
+static const unsigned char lec_ctrl_magic[] = {
+ 0xff,
+ 0x00,
+ 0x01,
+ 0x01
+};
+
+#define LEC_DATA_DIRECT_8023 2
+#define LEC_DATA_DIRECT_8025 3
+
+static int lec_is_data_direct(struct atm_vcc *vcc)
+{
+ return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
+ (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
+}
+
+static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = netdev_priv(dev);
+
+#if DUMP_PACKETS > 0
+ printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n",
+ dev->name, vcc->vpi, vcc->vci);
+#endif
+ if (!skb) {
+ pr_debug("%s: null skb\n", dev->name);
+ lec_vcc_close(priv, vcc);
+ return;
+ }
+#if DUMP_PACKETS >= 2
+#define MAX_SKB_DUMP 99
+#elif DUMP_PACKETS >= 1
+#define MAX_SKB_DUMP 30
+#endif
+#if DUMP_PACKETS > 0
+ printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n",
+ dev->name, skb->len, priv->lecid);
+ print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
+ skb->data, min(MAX_SKB_DUMP, skb->len), true);
+#endif /* DUMP_PACKETS > 0 */
+ if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {
+ /* Control frame, to daemon */
+ struct sock *sk = sk_atm(vcc);
+
+ pr_debug("%s: To daemon\n", dev->name);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+ } else { /* Data frame, queue to protocol handlers */
+ struct lec_arp_table *entry;
+ unsigned char *src, *dst;
+
+ atm_return(vcc, skb->truesize);
+ if (*(__be16 *) skb->data == htons(priv->lecid) ||
+ !priv->lecd || !(dev->flags & IFF_UP)) {
+ /*
+ * Probably looping back, or if lecd is missing,
+ * lecd has gone down
+ */
+ pr_debug("Ignoring frame...\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+ dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
+
+ /*
+ * If this is a Data Direct VCC, and the VCC does not match
+ * the LE_ARP cache entry, delete the LE_ARP cache entry.
+ */
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ if (lec_is_data_direct(vcc)) {
+ src = ((struct lecdatahdr_8023 *)skb->data)->h_source;
+ entry = lec_arp_find(priv, src);
+ if (entry && entry->vcc != vcc) {
+ lec_arp_remove(priv, entry);
+ lec_arp_put(entry);
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
+ !priv->is_proxy && /* Proxy wants all the packets */
+ memcmp(dst, dev->dev_addr, dev->addr_len)) {
+ dev_kfree_skb(skb);
+ return;
+ }
+ if (!hlist_empty(&priv->lec_arp_empty_ones))
+ lec_arp_check_empties(priv, vcc, skb);
+ skb_pull(skb, 2); /* skip lec_id */
+ skb->protocol = eth_type_trans(skb, dev);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+ }
+}
+
+static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = skb->dev;
+
+ if (vpriv == NULL) {
+ pr_info("vpriv = NULL!?!?!?\n");
+ return;
+ }
+
+ vpriv->old_pop(vcc, skb);
+
+ if (vpriv->xoff && atm_may_send(vcc, 0)) {
+ vpriv->xoff = 0;
+ if (netif_running(dev) && netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+}
+
+static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
+{
+ struct lec_vcc_priv *vpriv;
+ int bytes_left;
+ struct atmlec_ioc ioc_data;
+
+ /* Lecd must be up in this case */
+ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
+ if (bytes_left != 0)
+ pr_info("copy from user failed for %d bytes\n", bytes_left);
+ if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
+ return -EINVAL;
+ ioc_data.dev_num = array_index_nospec(ioc_data.dev_num, MAX_LEC_ITF);
+ if (!dev_lec[ioc_data.dev_num])
+ return -EINVAL;
+ vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
+ if (!vpriv)
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]),
+ &ioc_data, vcc, vcc->push);
+ vcc->proto_data = dev_lec[ioc_data.dev_num];
+ vcc->push = lec_push;
+ return 0;
+}
+
+static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
+{
+ if (arg < 0 || arg >= MAX_LEC_ITF)
+ return -EINVAL;
+ arg = array_index_nospec(arg, MAX_LEC_ITF);
+ if (!dev_lec[arg])
+ return -EINVAL;
+ vcc->proto_data = dev_lec[arg];
+ return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc);
+}
+
+/* Initialize device. */
+static int lecd_attach(struct atm_vcc *vcc, int arg)
+{
+ int i;
+ struct lec_priv *priv;
+
+ if (arg < 0)
+ arg = 0;
+ if (arg >= MAX_LEC_ITF)
+ return -EINVAL;
+ i = array_index_nospec(arg, MAX_LEC_ITF);
+ if (!dev_lec[i]) {
+ int size;
+
+ size = sizeof(struct lec_priv);
+ dev_lec[i] = alloc_etherdev(size);
+ if (!dev_lec[i])
+ return -ENOMEM;
+ dev_lec[i]->netdev_ops = &lec_netdev_ops;
+ dev_lec[i]->max_mtu = 18190;
+ snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
+ if (register_netdev(dev_lec[i])) {
+ free_netdev(dev_lec[i]);
+ return -EINVAL;
+ }
+
+ priv = netdev_priv(dev_lec[i]);
+ } else {
+ priv = netdev_priv(dev_lec[i]);
+ if (priv->lecd)
+ return -EADDRINUSE;
+ }
+ lec_arp_init(priv);
+ priv->itfnum = i; /* LANE2 addition */
+ priv->lecd = vcc;
+ vcc->dev = &lecatm_dev;
+ vcc_insert_socket(sk_atm(vcc));
+
+ vcc->proto_data = dev_lec[i];
+ set_bit(ATM_VF_META, &vcc->flags);
+ set_bit(ATM_VF_READY, &vcc->flags);
+
+ /* Set default values to these variables */
+ priv->maximum_unknown_frame_count = 1;
+ priv->max_unknown_frame_time = (1 * HZ);
+ priv->vcc_timeout_period = (1200 * HZ);
+ priv->max_retry_count = 1;
+ priv->aging_time = (300 * HZ);
+ priv->forward_delay_time = (15 * HZ);
+ priv->topology_change = 0;
+ priv->arp_response_time = (1 * HZ);
+ priv->flush_timeout = (4 * HZ);
+ priv->path_switching_delay = (6 * HZ);
+
+ if (dev_lec[i]->flags & IFF_UP)
+ netif_start_queue(dev_lec[i]);
+ __module_get(THIS_MODULE);
+ return i;
+}
+
+#ifdef CONFIG_PROC_FS
+static const char *lec_arp_get_status_string(unsigned char status)
+{
+ static const char *const lec_arp_status_string[] = {
+ "ESI_UNKNOWN ",
+ "ESI_ARP_PENDING ",
+ "ESI_VC_PENDING ",
+ "<Undefined> ",
+ "ESI_FLUSH_PENDING ",
+ "ESI_FORWARD_DIRECT"
+ };
+
+ if (status > ESI_FORWARD_DIRECT)
+ status = 3; /* ESI_UNDEFINED */
+ return lec_arp_status_string[status];
+}
+
+static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
+{
+ seq_printf(seq, "%pM ", entry->mac_addr);
+ seq_printf(seq, "%*phN ", ATM_ESA_LEN, entry->atm_addr);
+ seq_printf(seq, "%s %4.4x", lec_arp_get_status_string(entry->status),
+ entry->flags & 0xffff);
+ if (entry->vcc)
+ seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
+ else
+ seq_printf(seq, " ");
+ if (entry->recv_vcc) {
+ seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
+ entry->recv_vcc->vci);
+ }
+ seq_putc(seq, '\n');
+}
+
+struct lec_state {
+ unsigned long flags;
+ struct lec_priv *locked;
+ struct hlist_node *node;
+ struct net_device *dev;
+ int itf;
+ int arp_table;
+ int misc_table;
+};
+
+static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl,
+ loff_t *l)
+{
+ struct hlist_node *e = state->node;
+
+ if (!e)
+ e = tbl->first;
+ if (e == SEQ_START_TOKEN) {
+ e = tbl->first;
+ --*l;
+ }
+
+ for (; e; e = e->next) {
+ if (--*l < 0)
+ break;
+ }
+ state->node = e;
+
+ return (*l < 0) ? state : NULL;
+}
+
+static void *lec_arp_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ void *v = NULL;
+ int p;
+
+ for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
+ v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l);
+ if (v)
+ break;
+ }
+ state->arp_table = p;
+ return v;
+}
+
+static void *lec_misc_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ struct hlist_head *lec_misc_tables[] = {
+ &priv->lec_arp_empty_ones,
+ &priv->lec_no_forward,
+ &priv->mcast_fwds
+ };
+ void *v = NULL;
+ int q;
+
+ for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
+ v = lec_tbl_walk(state, lec_misc_tables[q], l);
+ if (v)
+ break;
+ }
+ state->misc_table = q;
+ return v;
+}
+
+static void *lec_priv_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ if (!state->locked) {
+ state->locked = priv;
+ spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
+ }
+ if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
+ spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
+ state->locked = NULL;
+ /* Partial state reset for the next time we get called */
+ state->arp_table = state->misc_table = 0;
+ }
+ return state->locked;
+}
+
+static void *lec_itf_walk(struct lec_state *state, loff_t *l)
+{
+ struct net_device *dev;
+ void *v;
+
+ dev = state->dev ? state->dev : dev_lec[state->itf];
+ v = (dev && netdev_priv(dev)) ?
+ lec_priv_walk(state, l, netdev_priv(dev)) : NULL;
+ if (!v && dev) {
+ dev_put(dev);
+ /* Partial state reset for the next time we get called */
+ dev = NULL;
+ }
+ state->dev = dev;
+ return v;
+}
+
+static void *lec_get_idx(struct lec_state *state, loff_t l)
+{
+ void *v = NULL;
+
+ for (; state->itf < MAX_LEC_ITF; state->itf++) {
+ v = lec_itf_walk(state, &l);
+ if (v)
+ break;
+ }
+ return v;
+}
+
+static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ state->itf = 0;
+ state->dev = NULL;
+ state->locked = NULL;
+ state->arp_table = 0;
+ state->misc_table = 0;
+ state->node = SEQ_START_TOKEN;
+
+ return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN;
+}
+
+static void lec_seq_stop(struct seq_file *seq, void *v)
+{
+ struct lec_state *state = seq->private;
+
+ if (state->dev) {
+ spin_unlock_irqrestore(&state->locked->lec_arp_lock,
+ state->flags);
+ dev_put(state->dev);
+ }
+}
+
+static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ ++*pos;
+ return lec_get_idx(state, 1);
+}
+
+static int lec_seq_show(struct seq_file *seq, void *v)
+{
+ static const char lec_banner[] =
+ "Itf MAC ATM destination"
+ " Status Flags "
+ "VPI/VCI Recv VPI/VCI\n";
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq, lec_banner);
+ else {
+ struct lec_state *state = seq->private;
+ struct net_device *dev = state->dev;
+ struct lec_arp_table *entry = hlist_entry(state->node,
+ struct lec_arp_table,
+ next);
+
+ seq_printf(seq, "%s ", dev->name);
+ lec_info(seq, entry);
+ }
+ return 0;
+}
+
+static const struct seq_operations lec_seq_ops = {
+ .start = lec_seq_start,
+ .next = lec_seq_next,
+ .stop = lec_seq_stop,
+ .show = lec_seq_show,
+};
+#endif
+
+static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int err = 0;
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ case ATMLEC_MCAST:
+ case ATMLEC_DATA:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ err = lecd_attach(vcc, (int)arg);
+ if (err >= 0)
+ sock->state = SS_CONNECTED;
+ break;
+ case ATMLEC_MCAST:
+ err = lec_mcast_attach(vcc, (int)arg);
+ break;
+ case ATMLEC_DATA:
+ err = lec_vcc_attach(vcc, (void __user *)arg);
+ break;
+ }
+
+ return err;
+}
+
+static struct atm_ioctl lane_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = lane_ioctl,
+};
+
+static int __init lane_module_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *p;
+
+ p = proc_create_seq_private("lec", 0444, atm_proc_root, &lec_seq_ops,
+ sizeof(struct lec_state), NULL);
+ if (!p) {
+ pr_err("Unable to initialize /proc/net/atm/lec\n");
+ return -ENOMEM;
+ }
+#endif
+
+ register_atm_ioctl(&lane_ioctl_ops);
+ pr_info("lec.c: initialized\n");
+ return 0;
+}
+
+static void __exit lane_module_cleanup(void)
+{
+ int i;
+
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("lec", atm_proc_root);
+#endif
+
+ deregister_atm_ioctl(&lane_ioctl_ops);
+
+ for (i = 0; i < MAX_LEC_ITF; i++) {
+ if (dev_lec[i] != NULL) {
+ unregister_netdev(dev_lec[i]);
+ free_netdev(dev_lec[i]);
+ dev_lec[i] = NULL;
+ }
+ }
+}
+
+module_init(lane_module_init);
+module_exit(lane_module_cleanup);
+
+/*
+ * LANE2: 3.1.3, LE_RESOLVE.request
+ * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
+ * If sizeoftlvs == NULL the default TLVs associated with this
+ * lec will be used.
+ * If dst_mac == NULL, targetless LE_ARP will be sent
+ */
+static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs)
+{
+ unsigned long flags;
+ struct lec_priv *priv = netdev_priv(dev);
+ struct lec_arp_table *table;
+ struct sk_buff *skb;
+ int retval;
+
+ if (force == 0) {
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ table = lec_arp_find(priv, dst_mac);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ if (table == NULL)
+ return -1;
+
+ *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
+ if (*tlvs == NULL)
+ return -1;
+
+ *sizeoftlvs = table->sizeoftlvs;
+
+ return 0;
+ }
+
+ if (sizeoftlvs == NULL)
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
+
+ else {
+ skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return -1;
+ skb->len = *sizeoftlvs;
+ skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
+ }
+ return retval;
+}
+
+/*
+ * LANE2: 3.1.4, LE_ASSOCIATE.request
+ * Associate the *tlvs with the *lan_dst address.
+ * Will overwrite any previous association
+ * Returns 1 for success, 0 for failure (out of memory)
+ *
+ */
+static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
+ const u8 *tlvs, u32 sizeoftlvs)
+{
+ int retval;
+ struct sk_buff *skb;
+ struct lec_priv *priv = netdev_priv(dev);
+
+ if (!ether_addr_equal(lan_dst, dev->dev_addr))
+ return 0; /* not our mac address */
+
+ kfree(priv->tlvs); /* NULL if there was no previous association */
+
+ priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
+ if (priv->tlvs == NULL)
+ return 0;
+ priv->sizeoftlvs = sizeoftlvs;
+
+ skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return 0;
+ skb->len = sizeoftlvs;
+ skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
+ retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
+ if (retval != 0)
+ pr_info("lec.c: lane2_associate_req() failed\n");
+ /*
+ * If the previous association has changed we must
+ * somehow notify other LANE entities about the change
+ */
+ return 1;
+}
+
+/*
+ * LANE2: 3.1.5, LE_ASSOCIATE.indication
+ *
+ */
+static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
+ const u8 *tlvs, u32 sizeoftlvs)
+{
+#if 0
+ int i = 0;
+#endif
+ struct lec_priv *priv = netdev_priv(dev);
+#if 0 /*
+ * Why have the TLVs in LE_ARP entries
+ * since we do not use them? When you
+ * uncomment this code, make sure the
+ * TLVs get freed when entry is killed
+ */
+ struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
+
+ if (entry == NULL)
+ return; /* should not happen */
+
+ kfree(entry->tlvs);
+
+ entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
+ if (entry->tlvs == NULL)
+ return;
+ entry->sizeoftlvs = sizeoftlvs;
+#endif
+#if 0
+ pr_info("\n");
+ pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
+ while (i < sizeoftlvs)
+ pr_cont("%02x ", tlvs[i++]);
+
+ pr_cont("\n");
+#endif
+
+ /* tell MPOA about the TLVs we saw */
+ if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
+ priv->lane2_ops->associate_indicator(dev, mac_addr,
+ tlvs, sizeoftlvs);
+ }
+}
+
+/*
+ * Here starts what used to lec_arpc.c
+ *
+ * lec_arpc.c was added here when making
+ * lane client modular. October 1997
+ */
+
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/param.h>
+#include <linux/atomic.h>
+#include <linux/inetdevice.h>
+#include <net/route.h>
+
+#if 0
+#define pr_debug(format, args...)
+/*
+ #define pr_debug printk
+*/
+#endif
+#define DEBUG_ARP_TABLE 0
+
+#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
+
+static void lec_arp_check_expire(struct work_struct *work);
+static void lec_arp_expire_arp(struct timer_list *t);
+
+/*
+ * Arp table funcs
+ */
+
+#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1))
+
+/*
+ * Initialization of arp-cache
+ */
+static void lec_arp_init(struct lec_priv *priv)
+{
+ unsigned short i;
+
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
+ INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
+ INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
+ INIT_HLIST_HEAD(&priv->lec_no_forward);
+ INIT_HLIST_HEAD(&priv->mcast_fwds);
+ spin_lock_init(&priv->lec_arp_lock);
+ INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire);
+ schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
+}
+
+static void lec_arp_clear_vccs(struct lec_arp_table *entry)
+{
+ if (entry->vcc) {
+ struct atm_vcc *vcc = entry->vcc;
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+
+ vcc->pop = vpriv->old_pop;
+ if (vpriv->xoff)
+ netif_wake_queue(dev);
+ kfree(vpriv);
+ vcc->user_back = NULL;
+ vcc->push = entry->old_push;
+ vcc_release_async(vcc, -EPIPE);
+ entry->vcc = NULL;
+ }
+ if (entry->recv_vcc) {
+ struct atm_vcc *vcc = entry->recv_vcc;
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+
+ kfree(vpriv);
+ vcc->user_back = NULL;
+
+ entry->recv_vcc->push = entry->old_recv_push;
+ vcc_release_async(entry->recv_vcc, -EPIPE);
+ entry->recv_vcc = NULL;
+ }
+}
+
+/*
+ * Insert entry to lec_arp_table
+ * LANE2: Add to the end of the list to satisfy 8.1.13
+ */
+static inline void
+lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry)
+{
+ struct hlist_head *tmp;
+
+ tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])];
+ hlist_add_head(&entry->next, tmp);
+
+ pr_debug("Added entry:%pM\n", entry->mac_addr);
+}
+
+/*
+ * Remove entry from lec_arp_table
+ */
+static int
+lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
+{
+ struct lec_arp_table *entry;
+ int i, remove_vcc = 1;
+
+ if (!to_remove)
+ return -1;
+
+ hlist_del(&to_remove->next);
+ del_timer(&to_remove->timer);
+
+ /*
+ * If this is the only MAC connected to this VCC,
+ * also tear down the VCC
+ */
+ if (to_remove->status >= ESI_FLUSH_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
+ */
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry(entry,
+ &priv->lec_arp_tables[i], next) {
+ if (memcmp(to_remove->atm_addr,
+ entry->atm_addr, ATM_ESA_LEN) == 0) {
+ remove_vcc = 0;
+ break;
+ }
+ }
+ }
+ if (remove_vcc)
+ lec_arp_clear_vccs(to_remove);
+ }
+ skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
+
+ pr_debug("Removed entry:%pM\n", to_remove->mac_addr);
+ return 0;
+}
+
+#if DEBUG_ARP_TABLE
+static const char *get_status_string(unsigned char st)
+{
+ switch (st) {
+ case ESI_UNKNOWN:
+ return "ESI_UNKNOWN";
+ case ESI_ARP_PENDING:
+ return "ESI_ARP_PENDING";
+ case ESI_VC_PENDING:
+ return "ESI_VC_PENDING";
+ case ESI_FLUSH_PENDING:
+ return "ESI_FLUSH_PENDING";
+ case ESI_FORWARD_DIRECT:
+ return "ESI_FORWARD_DIRECT";
+ }
+ return "<UNKNOWN>";
+}
+
+static void dump_arp_table(struct lec_priv *priv)
+{
+ struct lec_arp_table *rulla;
+ char buf[256];
+ int i, offset;
+
+ pr_info("Dump %p:\n", priv);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry(rulla,
+ &priv->lec_arp_tables[i], next) {
+ offset = 0;
+ offset += sprintf(buf, "%d: %p\n", i, rulla);
+ offset += sprintf(buf + offset, "Mac: %pM ",
+ rulla->mac_addr);
+ offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
+ rulla->atm_addr);
+ offset += sprintf(buf + offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc ? rulla->vcc->vpi : 0,
+ rulla->vcc ? rulla->vcc->vci : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->
+ vpi : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->
+ vci : 0, rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset +=
+ sprintf(buf + offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ pr_info("%s\n", buf);
+ }
+ }
+
+ if (!hlist_empty(&priv->lec_no_forward))
+ pr_info("No forward\n");
+ hlist_for_each_entry(rulla, &priv->lec_no_forward, next) {
+ offset = 0;
+ offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
+ offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
+ rulla->atm_addr);
+ offset += sprintf(buf + offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc ? rulla->vcc->vpi : 0,
+ rulla->vcc ? rulla->vcc->vci : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset += sprintf(buf + offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ pr_info("%s\n", buf);
+ }
+
+ if (!hlist_empty(&priv->lec_arp_empty_ones))
+ pr_info("Empty ones\n");
+ hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) {
+ offset = 0;
+ offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
+ offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
+ rulla->atm_addr);
+ offset += sprintf(buf + offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc ? rulla->vcc->vpi : 0,
+ rulla->vcc ? rulla->vcc->vci : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset += sprintf(buf + offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ pr_info("%s", buf);
+ }
+
+ if (!hlist_empty(&priv->mcast_fwds))
+ pr_info("Multicast Forward VCCs\n");
+ hlist_for_each_entry(rulla, &priv->mcast_fwds, next) {
+ offset = 0;
+ offset += sprintf(buf + offset, "Mac: %pM ", rulla->mac_addr);
+ offset += sprintf(buf + offset, "Atm: %*ph ", ATM_ESA_LEN,
+ rulla->atm_addr);
+ offset += sprintf(buf + offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc ? rulla->vcc->vpi : 0,
+ rulla->vcc ? rulla->vcc->vci : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
+ rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset += sprintf(buf + offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ pr_info("%s\n", buf);
+ }
+
+}
+#else
+#define dump_arp_table(priv) do { } while (0)
+#endif
+
+/*
+ * Destruction of arp-cache
+ */
+static void lec_arp_destroy(struct lec_priv *priv)
+{
+ unsigned long flags;
+ struct hlist_node *next;
+ struct lec_arp_table *entry;
+ int i;
+
+ cancel_delayed_work_sync(&priv->lec_arp_work);
+
+ /*
+ * Remove all entries
+ */
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_tables[i], next) {
+ lec_arp_remove(priv, entry);
+ lec_arp_put(entry);
+ }
+ INIT_HLIST_HEAD(&priv->lec_arp_tables[i]);
+ }
+
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_empty_ones, next) {
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ INIT_HLIST_HEAD(&priv->lec_arp_empty_ones);
+
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_no_forward, next) {
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ INIT_HLIST_HEAD(&priv->lec_no_forward);
+
+ hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ lec_arp_clear_vccs(entry);
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ INIT_HLIST_HEAD(&priv->mcast_fwds);
+ priv->mcast_vcc = NULL;
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+/*
+ * Find entry by mac_address
+ */
+static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
+ const unsigned char *mac_addr)
+{
+ struct hlist_head *head;
+ struct lec_arp_table *entry;
+
+ pr_debug("%pM\n", mac_addr);
+
+ head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])];
+ hlist_for_each_entry(entry, head, next) {
+ if (ether_addr_equal(mac_addr, entry->mac_addr))
+ return entry;
+ }
+ return NULL;
+}
+
+static struct lec_arp_table *make_entry(struct lec_priv *priv,
+ const unsigned char *mac_addr)
+{
+ struct lec_arp_table *to_return;
+
+ to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
+ if (!to_return)
+ return NULL;
+ ether_addr_copy(to_return->mac_addr, mac_addr);
+ INIT_HLIST_NODE(&to_return->next);
+ timer_setup(&to_return->timer, lec_arp_expire_arp, 0);
+ to_return->last_used = jiffies;
+ to_return->priv = priv;
+ skb_queue_head_init(&to_return->tx_wait);
+ refcount_set(&to_return->usage, 1);
+ return to_return;
+}
+
+/* Arp sent timer expired */
+static void lec_arp_expire_arp(struct timer_list *t)
+{
+ struct lec_arp_table *entry;
+
+ entry = from_timer(entry, t, timer);
+
+ pr_debug("\n");
+ if (entry->status == ESI_ARP_PENDING) {
+ if (entry->no_tries <= entry->priv->max_retry_count) {
+ if (entry->is_rdesc)
+ send_to_lecd(entry->priv, l_rdesc_arp_xmt,
+ entry->mac_addr, NULL, NULL);
+ else
+ send_to_lecd(entry->priv, l_arp_xmt,
+ entry->mac_addr, NULL, NULL);
+ entry->no_tries++;
+ }
+ mod_timer(&entry->timer, jiffies + (1 * HZ));
+ }
+}
+
+/* Unknown/unused vcc expire, remove associated entry */
+static void lec_arp_expire_vcc(struct timer_list *t)
+{
+ unsigned long flags;
+ struct lec_arp_table *to_remove = from_timer(to_remove, t, timer);
+ struct lec_priv *priv = to_remove->priv;
+
+ del_timer(&to_remove->timer);
+
+ pr_debug("%p %p: vpi:%d vci:%d\n",
+ to_remove, priv,
+ to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
+ to_remove->vcc ? to_remove->recv_vcc->vci : 0);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ hlist_del(&to_remove->next);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ lec_arp_clear_vccs(to_remove);
+ lec_arp_put(to_remove);
+}
+
+static bool __lec_arp_check_expire(struct lec_arp_table *entry,
+ unsigned long now,
+ struct lec_priv *priv)
+{
+ unsigned long time_to_check;
+
+ if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change)
+ time_to_check = priv->forward_delay_time;
+ else
+ time_to_check = priv->aging_time;
+
+ pr_debug("About to expire: %lx - %lx > %lx\n",
+ now, entry->last_used, time_to_check);
+ if (time_after(now, entry->last_used + time_to_check) &&
+ !(entry->flags & LEC_PERMANENT_FLAG) &&
+ !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */
+ /* Remove entry */
+ pr_debug("Entry timed out\n");
+ lec_arp_remove(priv, entry);
+ lec_arp_put(entry);
+ } else {
+ /* Something else */
+ if ((entry->status == ESI_VC_PENDING ||
+ entry->status == ESI_ARP_PENDING) &&
+ time_after_eq(now, entry->timestamp +
+ priv->max_unknown_frame_time)) {
+ entry->timestamp = jiffies;
+ entry->packets_flooded = 0;
+ if (entry->status == ESI_VC_PENDING)
+ send_to_lecd(priv, l_svc_setup,
+ entry->mac_addr,
+ entry->atm_addr,
+ NULL);
+ }
+ if (entry->status == ESI_FLUSH_PENDING &&
+ time_after_eq(now, entry->timestamp +
+ priv->path_switching_delay)) {
+ lec_arp_hold(entry);
+ return true;
+ }
+ }
+
+ return false;
+}
+/*
+ * Expire entries.
+ * 1. Re-set timer
+ * 2. For each entry, delete entries that have aged past the age limit.
+ * 3. For each entry, depending on the status of the entry, perform
+ * the following maintenance.
+ * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
+ * tick_count is above the max_unknown_frame_time, clear
+ * the tick_count to zero and clear the packets_flooded counter
+ * to zero. This supports the packet rate limit per address
+ * while flooding unknowns.
+ * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
+ * than or equal to the path_switching_delay, change the status
+ * to ESI_FORWARD_DIRECT. This causes the flush period to end
+ * regardless of the progress of the flush protocol.
+ */
+static void lec_arp_check_expire(struct work_struct *work)
+{
+ unsigned long flags;
+ struct lec_priv *priv =
+ container_of(work, struct lec_priv, lec_arp_work.work);
+ struct hlist_node *next;
+ struct lec_arp_table *entry;
+ unsigned long now;
+ int i;
+
+ pr_debug("%p\n", priv);
+ now = jiffies;
+restart:
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_tables[i], next) {
+ if (__lec_arp_check_expire(entry, now, priv)) {
+ struct sk_buff *skb;
+ struct atm_vcc *vcc = entry->vcc;
+
+ spin_unlock_irqrestore(&priv->lec_arp_lock,
+ flags);
+ while ((skb = skb_dequeue(&entry->tx_wait)))
+ lec_send(vcc, skb);
+ entry->last_used = jiffies;
+ entry->status = ESI_FORWARD_DIRECT;
+ lec_arp_put(entry);
+
+ goto restart;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL);
+}
+
+/*
+ * Try to find vcc where mac_address is attached.
+ *
+ */
+static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
+ const unsigned char *mac_to_find,
+ int is_rdesc,
+ struct lec_arp_table **ret_entry)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ struct atm_vcc *found;
+
+ if (mac_to_find[0] & 0x01) {
+ switch (priv->lane_version) {
+ case 1:
+ return priv->mcast_vcc;
+ case 2: /* LANE2 wants arp for multicast addresses */
+ if (ether_addr_equal(mac_to_find, bus_mac))
+ return priv->mcast_vcc;
+ break;
+ default:
+ break;
+ }
+ }
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_to_find);
+
+ if (entry) {
+ if (entry->status == ESI_FORWARD_DIRECT) {
+ /* Connection Ok */
+ entry->last_used = jiffies;
+ lec_arp_hold(entry);
+ *ret_entry = entry;
+ found = entry->vcc;
+ goto out;
+ }
+ /*
+ * If the LE_ARP cache entry is still pending, reset count to 0
+ * so another LE_ARP request can be made for this frame.
+ */
+ if (entry->status == ESI_ARP_PENDING)
+ entry->no_tries = 0;
+ /*
+ * Data direct VC not yet set up, check to see if the unknown
+ * frame count is greater than the limit. If the limit has
+ * not been reached, allow the caller to send packet to
+ * BUS.
+ */
+ if (entry->status != ESI_FLUSH_PENDING &&
+ entry->packets_flooded <
+ priv->maximum_unknown_frame_count) {
+ entry->packets_flooded++;
+ pr_debug("Flooding..\n");
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ /*
+ * We got here because entry->status == ESI_FLUSH_PENDING
+ * or BUS flood limit was reached for an entry which is
+ * in ESI_ARP_PENDING or ESI_VC_PENDING state.
+ */
+ lec_arp_hold(entry);
+ *ret_entry = entry;
+ pr_debug("entry->status %d entry->vcc %p\n", entry->status,
+ entry->vcc);
+ found = NULL;
+ } else {
+ /* No matching entry was found */
+ entry = make_entry(priv, mac_to_find);
+ pr_debug("Making entry\n");
+ if (!entry) {
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ lec_arp_add(priv, entry);
+ /* We want arp-request(s) to be sent */
+ entry->packets_flooded = 1;
+ entry->status = ESI_ARP_PENDING;
+ entry->no_tries = 1;
+ entry->last_used = entry->timestamp = jiffies;
+ entry->is_rdesc = is_rdesc;
+ if (entry->is_rdesc)
+ send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
+ NULL);
+ else
+ send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
+ entry->timer.expires = jiffies + (1 * HZ);
+ entry->timer.function = lec_arp_expire_arp;
+ add_timer(&entry->timer);
+ found = priv->mcast_vcc;
+ }
+
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return found;
+}
+
+static int
+lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr,
+ unsigned long permanent)
+{
+ unsigned long flags;
+ struct hlist_node *next;
+ struct lec_arp_table *entry;
+ int i;
+
+ pr_debug("\n");
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_tables[i], next) {
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) &&
+ (permanent ||
+ !(entry->flags & LEC_PERMANENT_FLAG))) {
+ lec_arp_remove(priv, entry);
+ lec_arp_put(entry);
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return -1;
+}
+
+/*
+ * Notifies: Response to arp_request (atm_addr != NULL)
+ */
+static void
+lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
+ const unsigned char *atm_addr, unsigned long remoteflag,
+ unsigned int targetless_le_arp)
+{
+ unsigned long flags;
+ struct hlist_node *next;
+ struct lec_arp_table *entry, *tmp;
+ int i;
+
+ pr_debug("%smac:%pM\n",
+ (targetless_le_arp) ? "targetless " : "", mac_addr);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_addr);
+ if (entry == NULL && targetless_le_arp)
+ goto out; /*
+ * LANE2: ignore targetless LE_ARPs for which
+ * we have no entry in the cache. 7.1.30
+ */
+ if (!hlist_empty(&priv->lec_arp_empty_ones)) {
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_empty_ones, next) {
+ if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) {
+ hlist_del(&entry->next);
+ del_timer(&entry->timer);
+ tmp = lec_arp_find(priv, mac_addr);
+ if (tmp) {
+ del_timer(&tmp->timer);
+ tmp->status = ESI_FORWARD_DIRECT;
+ memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
+ tmp->vcc = entry->vcc;
+ tmp->old_push = entry->old_push;
+ tmp->last_used = jiffies;
+ del_timer(&entry->timer);
+ lec_arp_put(entry);
+ entry = tmp;
+ } else {
+ entry->status = ESI_FORWARD_DIRECT;
+ ether_addr_copy(entry->mac_addr,
+ mac_addr);
+ entry->last_used = jiffies;
+ lec_arp_add(priv, entry);
+ }
+ if (remoteflag)
+ entry->flags |= LEC_REMOTE_FLAG;
+ else
+ entry->flags &= ~LEC_REMOTE_FLAG;
+ pr_debug("After update\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ }
+ }
+
+ entry = lec_arp_find(priv, mac_addr);
+ if (!entry) {
+ entry = make_entry(priv, mac_addr);
+ if (!entry)
+ goto out;
+ entry->status = ESI_UNKNOWN;
+ lec_arp_add(priv, entry);
+ /* Temporary, changes before end of function */
+ }
+ memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
+ del_timer(&entry->timer);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry(tmp,
+ &priv->lec_arp_tables[i], next) {
+ if (entry != tmp &&
+ !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
+ /* Vcc to this host exists */
+ if (tmp->status > ESI_VC_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING,
+ * ESI_FORWARD_DIRECT
+ */
+ entry->vcc = tmp->vcc;
+ entry->old_push = tmp->old_push;
+ }
+ entry->status = tmp->status;
+ break;
+ }
+ }
+ }
+ if (remoteflag)
+ entry->flags |= LEC_REMOTE_FLAG;
+ else
+ entry->flags &= ~LEC_REMOTE_FLAG;
+ if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
+ entry->status = ESI_VC_PENDING;
+ send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
+ }
+ pr_debug("After update2\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+/*
+ * Notifies: Vcc setup ready
+ */
+static void
+lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i, found_entry = 0;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ if (ioc_data->receive == 2) {
+ pr_debug("LEC_ARP: Attaching mcast forward\n");
+#if 0
+ entry = lec_arp_find(priv, bus_mac);
+ if (!entry) {
+ pr_info("LEC_ARP: Multicast entry not found!\n");
+ goto out;
+ }
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+#endif
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ del_timer(&entry->timer);
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ hlist_add_head(&entry->next, &priv->mcast_fwds);
+ goto out;
+ } else if (ioc_data->receive == 1) {
+ /*
+ * Vcc which we don't want to make default vcc,
+ * attach it anyway.
+ */
+ pr_debug("LEC_ARP:Attaching data direct, not default: %*phN\n",
+ ATM_ESA_LEN, ioc_data->atm_addr);
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ eth_zero_addr(entry->mac_addr);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ entry->status = ESI_UNKNOWN;
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ hlist_add_head(&entry->next, &priv->lec_no_forward);
+ add_timer(&entry->timer);
+ dump_arp_table(priv);
+ goto out;
+ }
+ pr_debug("LEC_ARP:Attaching data direct, default: %*phN\n",
+ ATM_ESA_LEN, ioc_data->atm_addr);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry(entry,
+ &priv->lec_arp_tables[i], next) {
+ if (memcmp
+ (ioc_data->atm_addr, entry->atm_addr,
+ ATM_ESA_LEN) == 0) {
+ pr_debug("LEC_ARP: Attaching data direct\n");
+ pr_debug("Currently -> Vcc: %d, Rvcc:%d\n",
+ entry->vcc ? entry->vcc->vci : 0,
+ entry->recv_vcc ? entry->recv_vcc->
+ vci : 0);
+ found_entry = 1;
+ del_timer(&entry->timer);
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ if (entry->status == ESI_VC_PENDING) {
+ if (priv->maximum_unknown_frame_count
+ == 0)
+ entry->status =
+ ESI_FORWARD_DIRECT;
+ else {
+ entry->timestamp = jiffies;
+ entry->status =
+ ESI_FLUSH_PENDING;
+#if 0
+ send_to_lecd(priv, l_flush_xmt,
+ NULL,
+ entry->atm_addr,
+ NULL);
+#endif
+ }
+ } else {
+ /*
+ * They were forming a connection
+ * to us, and we to them. Our
+ * ATM address is numerically lower
+ * than theirs, so we make connection
+ * we formed into default VCC (8.1.11).
+ * Connection they made gets torn
+ * down. This might confuse some
+ * clients. Can be changed if
+ * someone reports trouble...
+ */
+ ;
+ }
+ }
+ }
+ }
+ if (found_entry) {
+ pr_debug("After vcc was added\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ /*
+ * Not found, snatch address from first data packet that arrives
+ * from this vcc
+ */
+ entry = make_entry(priv, bus_mac);
+ if (!entry)
+ goto out;
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ eth_zero_addr(entry->mac_addr);
+ entry->status = ESI_UNKNOWN;
+ hlist_add_head(&entry->next, &priv->lec_arp_empty_ones);
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ add_timer(&entry->timer);
+ pr_debug("After vcc was added\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ pr_debug("%lx\n", tran_id);
+restart:
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry(entry,
+ &priv->lec_arp_tables[i], next) {
+ if (entry->flush_tran_id == tran_id &&
+ entry->status == ESI_FLUSH_PENDING) {
+ struct sk_buff *skb;
+ struct atm_vcc *vcc = entry->vcc;
+
+ lec_arp_hold(entry);
+ spin_unlock_irqrestore(&priv->lec_arp_lock,
+ flags);
+ while ((skb = skb_dequeue(&entry->tx_wait)))
+ lec_send(vcc, skb);
+ entry->last_used = jiffies;
+ entry->status = ESI_FORWARD_DIRECT;
+ lec_arp_put(entry);
+ pr_debug("LEC_ARP: Flushed\n");
+ goto restart;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_set_flush_tran_id(struct lec_priv *priv,
+ const unsigned char *atm_addr, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
+ hlist_for_each_entry(entry,
+ &priv->lec_arp_tables[i], next) {
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
+ entry->flush_tran_id = tran_id;
+ pr_debug("Set flush transaction id to %lx for %p\n",
+ tran_id, entry);
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ unsigned char mac_addr[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+ };
+ struct lec_arp_table *to_add;
+ struct lec_vcc_priv *vpriv;
+ int err = 0;
+
+ vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL);
+ if (!vpriv)
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ to_add = make_entry(priv, mac_addr);
+ if (!to_add) {
+ vcc->pop = vpriv->old_pop;
+ kfree(vpriv);
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
+ to_add->status = ESI_FORWARD_DIRECT;
+ to_add->flags |= LEC_PERMANENT_FLAG;
+ to_add->vcc = vcc;
+ to_add->old_push = vcc->push;
+ vcc->push = lec_push;
+ priv->mcast_vcc = vcc;
+ lec_arp_add(priv, to_add);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return err;
+}
+
+static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ struct hlist_node *next;
+ struct lec_arp_table *entry;
+ int i;
+
+ pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
+ dump_arp_table(priv);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_tables[i], next) {
+ if (vcc == entry->vcc) {
+ lec_arp_remove(priv, entry);
+ lec_arp_put(entry);
+ if (priv->mcast_vcc == vcc)
+ priv->mcast_vcc = NULL;
+ }
+ }
+ }
+
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_empty_ones, next) {
+ if (entry->vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ }
+
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_no_forward, next) {
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ }
+
+ hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) {
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ hlist_del(&entry->next);
+ lec_arp_put(entry);
+ }
+ }
+
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct hlist_node *next;
+ struct lec_arp_table *entry, *tmp;
+ struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
+ unsigned char *src = hdr->h_source;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ hlist_for_each_entry_safe(entry, next,
+ &priv->lec_arp_empty_ones, next) {
+ if (vcc == entry->vcc) {
+ del_timer(&entry->timer);
+ ether_addr_copy(entry->mac_addr, src);
+ entry->status = ESI_FORWARD_DIRECT;
+ entry->last_used = jiffies;
+ /* We might have got an entry */
+ tmp = lec_arp_find(priv, src);
+ if (tmp) {
+ lec_arp_remove(priv, tmp);
+ lec_arp_put(tmp);
+ }
+ hlist_del(&entry->next);
+ lec_arp_add(priv, entry);
+ goto out;
+ }
+ }
+ pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n");
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+MODULE_LICENSE("GPL");
diff --git a/net/atm/lec.h b/net/atm/lec.h
new file mode 100644
index 000000000..be0e2667b
--- /dev/null
+++ b/net/atm/lec.h
@@ -0,0 +1,155 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Lan Emulation client header file
+ *
+ * Marko Kiiskila <mkiiskila@yahoo.com>
+ */
+
+#ifndef _LEC_H_
+#define _LEC_H_
+
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <linux/atmlec.h>
+
+#define LEC_HEADER_LEN 16
+
+struct lecdatahdr_8023 {
+ __be16 le_header;
+ unsigned char h_dest[ETH_ALEN];
+ unsigned char h_source[ETH_ALEN];
+ __be16 h_type;
+};
+
+struct lecdatahdr_8025 {
+ __be16 le_header;
+ unsigned char ac_pad;
+ unsigned char fc;
+ unsigned char h_dest[ETH_ALEN];
+ unsigned char h_source[ETH_ALEN];
+};
+
+#define LEC_MINIMUM_8023_SIZE 62
+#define LEC_MINIMUM_8025_SIZE 16
+
+/*
+ * Operations that LANE2 capable device can do. Two first functions
+ * are used to make the device do things. See spec 3.1.3 and 3.1.4.
+ *
+ * The third function is intended for the MPOA component sitting on
+ * top of the LANE device. The MPOA component assigns it's own function
+ * to (*associate_indicator)() and the LANE device will use that
+ * function to tell about TLVs it sees floating through.
+ *
+ */
+struct lane2_ops {
+ int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs);
+ int (*associate_req) (struct net_device *dev, const u8 *lan_dst,
+ const u8 *tlvs, u32 sizeoftlvs);
+ void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr,
+ const u8 *tlvs, u32 sizeoftlvs);
+};
+
+/*
+ * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType
+ * frames.
+ *
+ * 1. Dix Ethernet EtherType frames encoded by placing EtherType
+ * field in h_type field. Data follows immediately after header.
+ * 2. LLC Data frames whose total length, including LLC field and data,
+ * but not padding required to meet the minimum data frame length,
+ * is less than ETH_P_802_3_MIN MUST be encoded by placing that length
+ * in the h_type field. The LLC field follows header immediately.
+ * 3. LLC data frames longer than this maximum MUST be encoded by placing
+ * the value 0 in the h_type field.
+ *
+ */
+
+/* Hash table size */
+#define LEC_ARP_TABLE_SIZE 16
+
+struct lec_priv {
+ unsigned short lecid; /* Lecid of this client */
+ struct hlist_head lec_arp_empty_ones;
+ /* Used for storing VCC's that don't have a MAC address attached yet */
+ struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE];
+ /* Actual LE ARP table */
+ struct hlist_head lec_no_forward;
+ /*
+ * Used for storing VCC's (and forward packets from) which are to
+ * age out by not using them to forward packets.
+ * This is because to some LE clients there will be 2 VCCs. Only
+ * one of them gets used.
+ */
+ struct hlist_head mcast_fwds;
+ /*
+ * With LANEv2 it is possible that BUS (or a special multicast server)
+ * establishes multiple Multicast Forward VCCs to us. This list
+ * collects all those VCCs. LANEv1 client has only one item in this
+ * list. These entries are not aged out.
+ */
+ spinlock_t lec_arp_lock;
+ struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
+ struct atm_vcc *lecd;
+ struct delayed_work lec_arp_work; /* C10 */
+ unsigned int maximum_unknown_frame_count;
+ /*
+ * Within the period of time defined by this variable, the client will send
+ * no more than C10 frames to BUS for a given unicast destination. (C11)
+ */
+ unsigned long max_unknown_frame_time;
+ /*
+ * If no traffic has been sent in this vcc for this period of time,
+ * vcc will be torn down (C12)
+ */
+ unsigned long vcc_timeout_period;
+ /*
+ * An LE Client MUST not retry an LE_ARP_REQUEST for a
+ * given frame's LAN Destination more than maximum retry count times,
+ * after the first LEC_ARP_REQUEST (C13)
+ */
+ unsigned short max_retry_count;
+ /*
+ * Max time the client will maintain an entry in its arp cache in
+ * absence of a verification of that relationship (C17)
+ */
+ unsigned long aging_time;
+ /*
+ * Max time the client will maintain an entry in cache when
+ * topology change flag is true (C18)
+ */
+ unsigned long forward_delay_time; /* Topology change flag (C19) */
+ int topology_change;
+ /*
+ * Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE
+ * cycle to take (C20)
+ */
+ unsigned long arp_response_time;
+ /*
+ * Time limit ot wait to receive an LE_FLUSH_RESPONSE after the
+ * LE_FLUSH_REQUEST has been sent before taking recover action. (C21)
+ */
+ unsigned long flush_timeout;
+ /* The time since sending a frame to the bus after which the
+ * LE Client may assume that the frame has been either discarded or
+ * delivered to the recipient (C22)
+ */
+ unsigned long path_switching_delay;
+
+ u8 *tlvs; /* LANE2: TLVs are new */
+ u32 sizeoftlvs; /* The size of the tlv array in bytes */
+ int lane_version; /* LANE2 */
+ int itfnum; /* e.g. 2 for lec2, 5 for lec5 */
+ struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */
+ int is_proxy; /* bridge between ATM and Ethernet */
+};
+
+struct lec_vcc_priv {
+ void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb);
+ int xoff;
+};
+
+#define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back))
+
+#endif /* _LEC_H_ */
diff --git a/net/atm/lec_arpc.h b/net/atm/lec_arpc.h
new file mode 100644
index 000000000..39115fe07
--- /dev/null
+++ b/net/atm/lec_arpc.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Lec arp cache
+ *
+ * Marko Kiiskila <mkiiskila@yahoo.com>
+ */
+#ifndef _LEC_ARP_H_
+#define _LEC_ARP_H_
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/if_ether.h>
+#include <linux/atmlec.h>
+
+struct lec_arp_table {
+ struct hlist_node next; /* Linked entry list */
+ unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */
+ unsigned char mac_addr[ETH_ALEN]; /* Mac address */
+ int is_rdesc; /* Mac address is a route descriptor */
+ struct atm_vcc *vcc; /* Vcc this entry is attached */
+ struct atm_vcc *recv_vcc; /* Vcc we receive data from */
+
+ void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb);
+ /* Push that leads to daemon */
+
+ void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb);
+ /* Push that leads to daemon */
+
+ unsigned long last_used; /* For expiry */
+ unsigned long timestamp; /* Used for various timestamping things:
+ * 1. FLUSH started
+ * (status=ESI_FLUSH_PENDING)
+ * 2. Counting to
+ * max_unknown_frame_time
+ * (status=ESI_ARP_PENDING||
+ * status=ESI_VC_PENDING)
+ */
+ unsigned char no_tries; /* No of times arp retry has been tried */
+ unsigned char status; /* Status of this entry */
+ unsigned short flags; /* Flags for this entry */
+ unsigned short packets_flooded; /* Data packets flooded */
+ unsigned long flush_tran_id; /* Transaction id in flush protocol */
+ struct timer_list timer; /* Arping timer */
+ struct lec_priv *priv; /* Pointer back */
+ u8 *tlvs;
+ u32 sizeoftlvs; /*
+ * LANE2: Each MAC address can have TLVs
+ * associated with it. sizeoftlvs tells
+ * the length of the tlvs array
+ */
+ struct sk_buff_head tx_wait; /* wait queue for outgoing packets */
+ refcount_t usage; /* usage count */
+};
+
+/*
+ * LANE2: Template tlv struct for accessing
+ * the tlvs in the lec_arp_table->tlvs array
+ */
+struct tlv {
+ u32 type;
+ u8 length;
+ u8 value[255];
+};
+
+/* Status fields */
+#define ESI_UNKNOWN 0 /*
+ * Next packet sent to this mac address
+ * causes ARP-request to be sent
+ */
+#define ESI_ARP_PENDING 1 /*
+ * There is no ATM address associated with this
+ * 48-bit address. The LE-ARP protocol is in
+ * progress.
+ */
+#define ESI_VC_PENDING 2 /*
+ * There is a valid ATM address associated with
+ * this 48-bit address but there is no VC set
+ * up to that ATM address. The signaling
+ * protocol is in process.
+ */
+#define ESI_FLUSH_PENDING 4 /*
+ * The LEC has been notified of the FLUSH_START
+ * status and it is assumed that the flush
+ * protocol is in process.
+ */
+#define ESI_FORWARD_DIRECT 5 /*
+ * Either the Path Switching Delay (C22) has
+ * elapsed or the LEC has notified the Mapping
+ * that the flush protocol has completed. In
+ * either case, it is safe to forward packets
+ * to this address via the data direct VC.
+ */
+
+/* Flag values */
+#define LEC_REMOTE_FLAG 0x0001
+#define LEC_PERMANENT_FLAG 0x0002
+
+#endif /* _LEC_ARP_H_ */
diff --git a/net/atm/mpc.c b/net/atm/mpc.c
new file mode 100644
index 000000000..033871e71
--- /dev/null
+++ b/net/atm/mpc.c
@@ -0,0 +1,1535 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/capability.h>
+#include <linux/seq_file.h>
+
+/* We are an ethernet device */
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/uaccess.h>
+#include <asm/byteorder.h>
+#include <net/checksum.h> /* for ip_fast_csum() */
+#include <net/arp.h>
+#include <net/dst.h>
+#include <linux/proc_fs.h>
+
+/* And atm device */
+#include <linux/atmdev.h>
+#include <linux/atmlec.h>
+#include <linux/atmmpc.h>
+/* Modular too */
+#include <linux/module.h>
+
+#include "lec.h"
+#include "mpc.h"
+#include "resources.h"
+
+/*
+ * mpc.c: Implementation of MPOA client kernel part
+ */
+
+#if 0
+#define dprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args)
+#define dprintk_cont(format, args...) printk(KERN_CONT format, ##args)
+#else
+#define dprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\
+ } while (0)
+#define dprintk_cont(format, args...) \
+ do { if (0) printk(KERN_CONT format, ##args); } while (0)
+#endif
+
+#if 0
+#define ddprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args)
+#define ddprintk_cont(format, args...) printk(KERN_CONT format, ##args)
+#else
+#define ddprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\
+ } while (0)
+#define ddprintk_cont(format, args...) \
+ do { if (0) printk(KERN_CONT format, ##args); } while (0)
+#endif
+
+/* mpc_daemon -> kernel */
+static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void mps_death(struct k_message *msg, struct mpoa_client *mpc);
+static void clean_up(struct k_message *msg, struct mpoa_client *mpc,
+ int action);
+static void MPOA_cache_impos_rcvd(struct k_message *msg,
+ struct mpoa_client *mpc);
+static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg,
+ struct mpoa_client *mpc);
+static void set_mps_mac_addr_rcvd(struct k_message *mesg,
+ struct mpoa_client *mpc);
+
+static const uint8_t *copy_macs(struct mpoa_client *mpc,
+ const uint8_t *router_mac,
+ const uint8_t *tlvs, uint8_t mps_macs,
+ uint8_t device_type);
+static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry);
+
+static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc);
+static void mpoad_close(struct atm_vcc *vcc);
+static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb);
+
+static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb);
+static netdev_tx_t mpc_send_packet(struct sk_buff *skb,
+ struct net_device *dev);
+static int mpoa_event_listener(struct notifier_block *mpoa_notifier,
+ unsigned long event, void *dev);
+static void mpc_timer_refresh(void);
+static void mpc_cache_check(struct timer_list *unused);
+
+static struct llc_snap_hdr llc_snap_mpoa_ctrl = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x5e},
+ {0x00, 0x03} /* For MPOA control PDUs */
+};
+static struct llc_snap_hdr llc_snap_mpoa_data = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x00},
+ {0x08, 0x00} /* This is for IP PDUs only */
+};
+static struct llc_snap_hdr llc_snap_mpoa_data_tagged = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x00},
+ {0x88, 0x4c} /* This is for tagged data PDUs */
+};
+
+static struct notifier_block mpoa_notifier = {
+ mpoa_event_listener,
+ NULL,
+ 0
+};
+
+struct mpoa_client *mpcs = NULL; /* FIXME */
+static struct atm_mpoa_qos *qos_head = NULL;
+static DEFINE_TIMER(mpc_timer, mpc_cache_check);
+
+
+static struct mpoa_client *find_mpc_by_itfnum(int itf)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->dev_num == itf)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->mpoad_vcc == vcc)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+static struct mpoa_client *find_mpc_by_lec(struct net_device *dev)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->dev == dev)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+/*
+ * Functions for managing QoS list
+ */
+
+/*
+ * Overwrites the old entry or makes a new one.
+ */
+struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos)
+{
+ struct atm_mpoa_qos *entry;
+
+ entry = atm_mpoa_search_qos(dst_ip);
+ if (entry != NULL) {
+ entry->qos = *qos;
+ return entry;
+ }
+
+ entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL);
+ if (entry == NULL) {
+ pr_info("mpoa: out of memory\n");
+ return entry;
+ }
+
+ entry->ipaddr = dst_ip;
+ entry->qos = *qos;
+
+ entry->next = qos_head;
+ qos_head = entry;
+
+ return entry;
+}
+
+struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip)
+{
+ struct atm_mpoa_qos *qos;
+
+ qos = qos_head;
+ while (qos) {
+ if (qos->ipaddr == dst_ip)
+ break;
+ qos = qos->next;
+ }
+
+ return qos;
+}
+
+/*
+ * Returns 0 for failure
+ */
+int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry)
+{
+ struct atm_mpoa_qos *curr;
+
+ if (entry == NULL)
+ return 0;
+ if (entry == qos_head) {
+ qos_head = qos_head->next;
+ kfree(entry);
+ return 1;
+ }
+
+ curr = qos_head;
+ while (curr != NULL) {
+ if (curr->next == entry) {
+ curr->next = entry->next;
+ kfree(entry);
+ return 1;
+ }
+ curr = curr->next;
+ }
+
+ return 0;
+}
+
+/* this is buggered - we need locking for qos_head */
+void atm_mpoa_disp_qos(struct seq_file *m)
+{
+ struct atm_mpoa_qos *qos;
+
+ qos = qos_head;
+ seq_printf(m, "QoS entries for shortcuts:\n");
+ seq_printf(m, "IP address\n TX:max_pcr pcr min_pcr max_cdv max_sdu\n RX:max_pcr pcr min_pcr max_cdv max_sdu\n");
+
+ while (qos != NULL) {
+ seq_printf(m, "%pI4\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n",
+ &qos->ipaddr,
+ qos->qos.txtp.max_pcr,
+ qos->qos.txtp.pcr,
+ qos->qos.txtp.min_pcr,
+ qos->qos.txtp.max_cdv,
+ qos->qos.txtp.max_sdu,
+ qos->qos.rxtp.max_pcr,
+ qos->qos.rxtp.pcr,
+ qos->qos.rxtp.min_pcr,
+ qos->qos.rxtp.max_cdv,
+ qos->qos.rxtp.max_sdu);
+ qos = qos->next;
+ }
+}
+
+static struct net_device *find_lec_by_itfnum(int itf)
+{
+ struct net_device *dev;
+ char name[IFNAMSIZ];
+
+ sprintf(name, "lec%d", itf);
+ dev = dev_get_by_name(&init_net, name);
+
+ return dev;
+}
+
+static struct mpoa_client *alloc_mpc(void)
+{
+ struct mpoa_client *mpc;
+
+ mpc = kzalloc(sizeof(struct mpoa_client), GFP_KERNEL);
+ if (mpc == NULL)
+ return NULL;
+ rwlock_init(&mpc->ingress_lock);
+ rwlock_init(&mpc->egress_lock);
+ mpc->next = mpcs;
+ atm_mpoa_init_cache(mpc);
+
+ mpc->parameters.mpc_p1 = MPC_P1;
+ mpc->parameters.mpc_p2 = MPC_P2;
+ memset(mpc->parameters.mpc_p3, 0, sizeof(mpc->parameters.mpc_p3));
+ mpc->parameters.mpc_p4 = MPC_P4;
+ mpc->parameters.mpc_p5 = MPC_P5;
+ mpc->parameters.mpc_p6 = MPC_P6;
+
+ mpcs = mpc;
+
+ return mpc;
+}
+
+/*
+ *
+ * start_mpc() puts the MPC on line. All the packets destined
+ * to the lec underneath us are now being monitored and
+ * shortcuts will be established.
+ *
+ */
+static void start_mpc(struct mpoa_client *mpc, struct net_device *dev)
+{
+
+ dprintk("(%s)\n", mpc->dev->name);
+ if (!dev->netdev_ops)
+ pr_info("(%s) not starting\n", dev->name);
+ else {
+ mpc->old_ops = dev->netdev_ops;
+ mpc->new_ops = *mpc->old_ops;
+ mpc->new_ops.ndo_start_xmit = mpc_send_packet;
+ dev->netdev_ops = &mpc->new_ops;
+ }
+}
+
+static void stop_mpc(struct mpoa_client *mpc)
+{
+ struct net_device *dev = mpc->dev;
+ dprintk("(%s)", mpc->dev->name);
+
+ /* Lets not nullify lec device's dev->hard_start_xmit */
+ if (dev->netdev_ops != &mpc->new_ops) {
+ dprintk_cont(" mpc already stopped, not fatal\n");
+ return;
+ }
+ dprintk_cont("\n");
+
+ dev->netdev_ops = mpc->old_ops;
+ mpc->old_ops = NULL;
+
+ /* close_shortcuts(mpc); ??? FIXME */
+}
+
+static const char *mpoa_device_type_string(char type) __attribute__ ((unused));
+
+static const char *mpoa_device_type_string(char type)
+{
+ switch (type) {
+ case NON_MPOA:
+ return "non-MPOA device";
+ case MPS:
+ return "MPS";
+ case MPC:
+ return "MPC";
+ case MPS_AND_MPC:
+ return "both MPS and MPC";
+ }
+
+ return "unspecified (non-MPOA) device";
+}
+
+/*
+ * lec device calls this via its netdev_priv(dev)->lane2_ops
+ * ->associate_indicator() when it sees a TLV in LE_ARP packet.
+ * We fill in the pointer above when we see a LANE2 lec initializing
+ * See LANE2 spec 3.1.5
+ *
+ * Quite a big and ugly function but when you look at it
+ * all it does is to try to locate and parse MPOA Device
+ * Type TLV.
+ * We give our lec a pointer to this function and when the
+ * lec sees a TLV it uses the pointer to call this function.
+ *
+ */
+static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr,
+ const u8 *tlvs, u32 sizeoftlvs)
+{
+ uint32_t type;
+ uint8_t length, mpoa_device_type, number_of_mps_macs;
+ const uint8_t *end_of_tlvs;
+ struct mpoa_client *mpc;
+
+ mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
+ dprintk("(%s) received TLV(s), ", dev->name);
+ dprintk("total length of all TLVs %d\n", sizeoftlvs);
+ mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
+ if (mpc == NULL) {
+ pr_info("(%s) no mpc\n", dev->name);
+ return;
+ }
+ end_of_tlvs = tlvs + sizeoftlvs;
+ while (end_of_tlvs - tlvs >= 5) {
+ type = ((tlvs[0] << 24) | (tlvs[1] << 16) |
+ (tlvs[2] << 8) | tlvs[3]);
+ length = tlvs[4];
+ tlvs += 5;
+ dprintk(" type 0x%x length %02x\n", type, length);
+ if (tlvs + length > end_of_tlvs) {
+ pr_info("TLV value extends past its buffer, aborting parse\n");
+ return;
+ }
+
+ if (type == 0) {
+ pr_info("mpoa: (%s) TLV type was 0, returning\n",
+ dev->name);
+ return;
+ }
+
+ if (type != TLV_MPOA_DEVICE_TYPE) {
+ tlvs += length;
+ continue; /* skip other TLVs */
+ }
+ mpoa_device_type = *tlvs++;
+ number_of_mps_macs = *tlvs++;
+ dprintk("(%s) MPOA device type '%s', ",
+ dev->name, mpoa_device_type_string(mpoa_device_type));
+ if (mpoa_device_type == MPS_AND_MPC &&
+ length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */
+ pr_info("(%s) short MPOA Device Type TLV\n",
+ dev->name);
+ continue;
+ }
+ if ((mpoa_device_type == MPS || mpoa_device_type == MPC) &&
+ length < 22 + number_of_mps_macs*ETH_ALEN) {
+ pr_info("(%s) short MPOA Device Type TLV\n", dev->name);
+ continue;
+ }
+ if (mpoa_device_type != MPS &&
+ mpoa_device_type != MPS_AND_MPC) {
+ dprintk("ignoring non-MPS device ");
+ if (mpoa_device_type == MPC)
+ tlvs += 20;
+ continue; /* we are only interested in MPSs */
+ }
+ if (number_of_mps_macs == 0 &&
+ mpoa_device_type == MPS_AND_MPC) {
+ pr_info("(%s) MPS_AND_MPC has zero MACs\n", dev->name);
+ continue; /* someone should read the spec */
+ }
+ dprintk_cont("this MPS has %d MAC addresses\n",
+ number_of_mps_macs);
+
+ /*
+ * ok, now we can go and tell our daemon
+ * the control address of MPS
+ */
+ send_set_mps_ctrl_addr(tlvs, mpc);
+
+ tlvs = copy_macs(mpc, mac_addr, tlvs,
+ number_of_mps_macs, mpoa_device_type);
+ if (tlvs == NULL)
+ return;
+ }
+ if (end_of_tlvs - tlvs != 0)
+ pr_info("(%s) ignoring %zd bytes of trailing TLV garbage\n",
+ dev->name, end_of_tlvs - tlvs);
+}
+
+/*
+ * Store at least advertizing router's MAC address
+ * plus the possible MAC address(es) to mpc->mps_macs.
+ * For a freshly allocated MPOA client mpc->mps_macs == 0.
+ */
+static const uint8_t *copy_macs(struct mpoa_client *mpc,
+ const uint8_t *router_mac,
+ const uint8_t *tlvs, uint8_t mps_macs,
+ uint8_t device_type)
+{
+ int num_macs;
+ num_macs = (mps_macs > 1) ? mps_macs : 1;
+
+ if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */
+ if (mpc->number_of_mps_macs != 0)
+ kfree(mpc->mps_macs);
+ mpc->number_of_mps_macs = 0;
+ mpc->mps_macs = kmalloc_array(ETH_ALEN, num_macs, GFP_KERNEL);
+ if (mpc->mps_macs == NULL) {
+ pr_info("(%s) out of mem\n", mpc->dev->name);
+ return NULL;
+ }
+ }
+ ether_addr_copy(mpc->mps_macs, router_mac);
+ tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20;
+ if (mps_macs > 0)
+ memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN);
+ tlvs += mps_macs*ETH_ALEN;
+ mpc->number_of_mps_macs = num_macs;
+
+ return tlvs;
+}
+
+static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
+{
+ in_cache_entry *entry;
+ struct iphdr *iph;
+ char *buff;
+ __be32 ipaddr = 0;
+
+ static struct {
+ struct llc_snap_hdr hdr;
+ __be32 tag;
+ } tagged_llc_snap_hdr = {
+ {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}},
+ 0
+ };
+
+ buff = skb->data + mpc->dev->hard_header_len;
+ iph = (struct iphdr *)buff;
+ ipaddr = iph->daddr;
+
+ ddprintk("(%s) ipaddr 0x%x\n",
+ mpc->dev->name, ipaddr);
+
+ entry = mpc->in_ops->get(ipaddr, mpc);
+ if (entry == NULL) {
+ entry = mpc->in_ops->add_entry(ipaddr, mpc);
+ if (entry != NULL)
+ mpc->in_ops->put(entry);
+ return 1;
+ }
+ /* threshold not exceeded or VCC not ready */
+ if (mpc->in_ops->cache_hit(entry, mpc) != OPEN) {
+ ddprintk("(%s) cache_hit: returns != OPEN\n",
+ mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return 1;
+ }
+
+ ddprintk("(%s) using shortcut\n",
+ mpc->dev->name);
+ /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */
+ if (iph->ttl <= 1) {
+ ddprintk("(%s) IP ttl = %u, using LANE\n",
+ mpc->dev->name, iph->ttl);
+ mpc->in_ops->put(entry);
+ return 1;
+ }
+ iph->ttl--;
+ iph->check = 0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+
+ if (entry->ctrl_info.tag != 0) {
+ ddprintk("(%s) adding tag 0x%x\n",
+ mpc->dev->name, entry->ctrl_info.tag);
+ tagged_llc_snap_hdr.tag = entry->ctrl_info.tag;
+ skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
+ skb_push(skb, sizeof(tagged_llc_snap_hdr));
+ /* add LLC/SNAP header */
+ skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr,
+ sizeof(tagged_llc_snap_hdr));
+ } else {
+ skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
+ skb_push(skb, sizeof(struct llc_snap_hdr));
+ /* add LLC/SNAP header + tag */
+ skb_copy_to_linear_data(skb, &llc_snap_mpoa_data,
+ sizeof(struct llc_snap_hdr));
+ }
+
+ atm_account_tx(entry->shortcut, skb);
+ entry->shortcut->send(entry->shortcut, skb);
+ entry->packets_fwded++;
+ mpc->in_ops->put(entry);
+
+ return 0;
+}
+
+/*
+ * Probably needs some error checks and locking, not sure...
+ */
+static netdev_tx_t mpc_send_packet(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct mpoa_client *mpc;
+ struct ethhdr *eth;
+ int i = 0;
+
+ mpc = find_mpc_by_lec(dev); /* this should NEVER fail */
+ if (mpc == NULL) {
+ pr_info("(%s) no MPC found\n", dev->name);
+ goto non_ip;
+ }
+
+ eth = (struct ethhdr *)skb->data;
+ if (eth->h_proto != htons(ETH_P_IP))
+ goto non_ip; /* Multi-Protocol Over ATM :-) */
+
+ /* Weed out funny packets (e.g., AF_PACKET or raw). */
+ if (skb->len < ETH_HLEN + sizeof(struct iphdr))
+ goto non_ip;
+ skb_set_network_header(skb, ETH_HLEN);
+ if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5)
+ goto non_ip;
+
+ while (i < mpc->number_of_mps_macs) {
+ if (ether_addr_equal(eth->h_dest, mpc->mps_macs + i * ETH_ALEN))
+ if (send_via_shortcut(skb, mpc) == 0) /* try shortcut */
+ return NETDEV_TX_OK;
+ i++;
+ }
+
+non_ip:
+ return __netdev_start_xmit(mpc->old_ops, skb, dev, false);
+}
+
+static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg)
+{
+ int bytes_left;
+ struct mpoa_client *mpc;
+ struct atmmpc_ioc ioc_data;
+ in_cache_entry *in_entry;
+ __be32 ipaddr;
+
+ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc));
+ if (bytes_left != 0) {
+ pr_info("mpoa:Short read (missed %d bytes) from userland\n",
+ bytes_left);
+ return -EFAULT;
+ }
+ ipaddr = ioc_data.ipaddr;
+ if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
+ return -EINVAL;
+
+ mpc = find_mpc_by_itfnum(ioc_data.dev_num);
+ if (mpc == NULL)
+ return -EINVAL;
+
+ if (ioc_data.type == MPC_SOCKET_INGRESS) {
+ in_entry = mpc->in_ops->get(ipaddr, mpc);
+ if (in_entry == NULL ||
+ in_entry->entry_state < INGRESS_RESOLVED) {
+ pr_info("(%s) did not find RESOLVED entry from ingress cache\n",
+ mpc->dev->name);
+ if (in_entry != NULL)
+ mpc->in_ops->put(in_entry);
+ return -EINVAL;
+ }
+ pr_info("(%s) attaching ingress SVC, entry = %pI4\n",
+ mpc->dev->name, &in_entry->ctrl_info.in_dst_ip);
+ in_entry->shortcut = vcc;
+ mpc->in_ops->put(in_entry);
+ } else {
+ pr_info("(%s) attaching egress SVC\n", mpc->dev->name);
+ }
+
+ vcc->proto_data = mpc->dev;
+ vcc->push = mpc_push;
+
+ return 0;
+}
+
+/*
+ *
+ */
+static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev)
+{
+ struct mpoa_client *mpc;
+ in_cache_entry *in_entry;
+ eg_cache_entry *eg_entry;
+
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL) {
+ pr_info("(%s) close for unknown MPC\n", dev->name);
+ return;
+ }
+
+ dprintk("(%s)\n", dev->name);
+ in_entry = mpc->in_ops->get_by_vcc(vcc, mpc);
+ if (in_entry) {
+ dprintk("(%s) ingress SVC closed ip = %pI4\n",
+ mpc->dev->name, &in_entry->ctrl_info.in_dst_ip);
+ in_entry->shortcut = NULL;
+ mpc->in_ops->put(in_entry);
+ }
+ eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc);
+ if (eg_entry) {
+ dprintk("(%s) egress SVC closed\n", mpc->dev->name);
+ eg_entry->shortcut = NULL;
+ mpc->eg_ops->put(eg_entry);
+ }
+
+ if (in_entry == NULL && eg_entry == NULL)
+ dprintk("(%s) unused vcc closed\n", dev->name);
+}
+
+static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct sk_buff *new_skb;
+ eg_cache_entry *eg;
+ struct mpoa_client *mpc;
+ __be32 tag;
+ char *tmp;
+
+ ddprintk("(%s)\n", dev->name);
+ if (skb == NULL) {
+ dprintk("(%s) null skb, closing VCC\n", dev->name);
+ mpc_vcc_close(vcc, dev);
+ return;
+ }
+
+ skb->dev = dev;
+ if (memcmp(skb->data, &llc_snap_mpoa_ctrl,
+ sizeof(struct llc_snap_hdr)) == 0) {
+ struct sock *sk = sk_atm(vcc);
+
+ dprintk("(%s) control packet arrived\n", dev->name);
+ /* Pass control packets to daemon */
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+ return;
+ }
+
+ /* data coming over the shortcut */
+ atm_return(vcc, skb->truesize);
+
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL) {
+ pr_info("(%s) unknown MPC\n", dev->name);
+ return;
+ }
+
+ if (memcmp(skb->data, &llc_snap_mpoa_data_tagged,
+ sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */
+ ddprintk("(%s) tagged data packet arrived\n", dev->name);
+
+ } else if (memcmp(skb->data, &llc_snap_mpoa_data,
+ sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */
+ pr_info("(%s) Unsupported non-tagged data packet arrived. Purging\n",
+ dev->name);
+ dev_kfree_skb_any(skb);
+ return;
+ } else {
+ pr_info("(%s) garbage arrived, purging\n", dev->name);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ tmp = skb->data + sizeof(struct llc_snap_hdr);
+ tag = *(__be32 *)tmp;
+
+ eg = mpc->eg_ops->get_by_tag(tag, mpc);
+ if (eg == NULL) {
+ pr_info("mpoa: (%s) Didn't find egress cache entry, tag = %u\n",
+ dev->name, tag);
+ purge_egress_shortcut(vcc, NULL);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ /*
+ * See if ingress MPC is using shortcut we opened as a return channel.
+ * This means we have a bi-directional vcc opened by us.
+ */
+ if (eg->shortcut == NULL) {
+ eg->shortcut = vcc;
+ pr_info("(%s) egress SVC in use\n", dev->name);
+ }
+
+ skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag));
+ /* get rid of LLC/SNAP header */
+ new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length);
+ /* LLC/SNAP is shorter than MAC header :( */
+ dev_kfree_skb_any(skb);
+ if (new_skb == NULL) {
+ mpc->eg_ops->put(eg);
+ return;
+ }
+ skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */
+ skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header,
+ eg->ctrl_info.DH_length);
+ new_skb->protocol = eth_type_trans(new_skb, dev);
+ skb_reset_network_header(new_skb);
+
+ eg->latest_ip_addr = ip_hdr(new_skb)->saddr;
+ eg->packets_rcvd++;
+ mpc->eg_ops->put(eg);
+
+ memset(ATM_SKB(new_skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(new_skb);
+}
+
+static const struct atmdev_ops mpc_ops = { /* only send is required */
+ .close = mpoad_close,
+ .send = msg_from_mpoad
+};
+
+static struct atm_dev mpc_dev = {
+ .ops = &mpc_ops,
+ .type = "mpc",
+ .number = 42,
+ .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock)
+ /* members not explicitly initialised will be 0 */
+};
+
+static int atm_mpoa_mpoad_attach(struct atm_vcc *vcc, int arg)
+{
+ struct mpoa_client *mpc;
+ struct lec_priv *priv;
+ int err;
+
+ if (mpcs == NULL) {
+ mpc_timer_refresh();
+
+ /* This lets us now how our LECs are doing */
+ err = register_netdevice_notifier(&mpoa_notifier);
+ if (err < 0) {
+ del_timer(&mpc_timer);
+ return err;
+ }
+ }
+
+ mpc = find_mpc_by_itfnum(arg);
+ if (mpc == NULL) {
+ dprintk("allocating new mpc for itf %d\n", arg);
+ mpc = alloc_mpc();
+ if (mpc == NULL)
+ return -ENOMEM;
+ mpc->dev_num = arg;
+ mpc->dev = find_lec_by_itfnum(arg);
+ /* NULL if there was no lec */
+ }
+ if (mpc->mpoad_vcc) {
+ pr_info("mpoad is already present for itf %d\n", arg);
+ return -EADDRINUSE;
+ }
+
+ if (mpc->dev) { /* check if the lec is LANE2 capable */
+ priv = netdev_priv(mpc->dev);
+ if (priv->lane_version < 2) {
+ dev_put(mpc->dev);
+ mpc->dev = NULL;
+ } else
+ priv->lane2_ops->associate_indicator = lane2_assoc_ind;
+ }
+
+ mpc->mpoad_vcc = vcc;
+ vcc->dev = &mpc_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ set_bit(ATM_VF_META, &vcc->flags);
+ set_bit(ATM_VF_READY, &vcc->flags);
+
+ if (mpc->dev) {
+ char empty[ATM_ESA_LEN];
+ memset(empty, 0, ATM_ESA_LEN);
+
+ start_mpc(mpc, mpc->dev);
+ /* set address if mpcd e.g. gets killed and restarted.
+ * If we do not do it now we have to wait for the next LE_ARP
+ */
+ if (memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0)
+ send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc);
+ }
+
+ __module_get(THIS_MODULE);
+ return arg;
+}
+
+static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc)
+{
+ struct k_message mesg;
+
+ memcpy(mpc->mps_ctrl_addr, addr, ATM_ESA_LEN);
+
+ mesg.type = SET_MPS_CTRL_ADDR;
+ memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN);
+ msg_to_mpoad(&mesg, mpc);
+}
+
+static void mpoad_close(struct atm_vcc *vcc)
+{
+ struct mpoa_client *mpc;
+ struct sk_buff *skb;
+
+ mpc = find_mpc_by_vcc(vcc);
+ if (mpc == NULL) {
+ pr_info("did not find MPC\n");
+ return;
+ }
+ if (!mpc->mpoad_vcc) {
+ pr_info("close for non-present mpoad\n");
+ return;
+ }
+
+ mpc->mpoad_vcc = NULL;
+ if (mpc->dev) {
+ struct lec_priv *priv = netdev_priv(mpc->dev);
+ priv->lane2_ops->associate_indicator = NULL;
+ stop_mpc(mpc);
+ dev_put(mpc->dev);
+ }
+
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+
+ while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
+ atm_return(vcc, skb->truesize);
+ kfree_skb(skb);
+ }
+
+ pr_info("(%s) going down\n",
+ (mpc->dev) ? mpc->dev->name : "<unknown>");
+ module_put(THIS_MODULE);
+}
+
+/*
+ *
+ */
+static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+
+ struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
+ struct k_message *mesg = (struct k_message *)skb->data;
+ WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
+
+ if (mpc == NULL) {
+ pr_info("no mpc found\n");
+ return 0;
+ }
+ dprintk("(%s)", mpc->dev ? mpc->dev->name : "<unknown>");
+ switch (mesg->type) {
+ case MPOA_RES_REPLY_RCVD:
+ dprintk_cont("mpoa_res_reply_rcvd\n");
+ MPOA_res_reply_rcvd(mesg, mpc);
+ break;
+ case MPOA_TRIGGER_RCVD:
+ dprintk_cont("mpoa_trigger_rcvd\n");
+ MPOA_trigger_rcvd(mesg, mpc);
+ break;
+ case INGRESS_PURGE_RCVD:
+ dprintk_cont("nhrp_purge_rcvd\n");
+ ingress_purge_rcvd(mesg, mpc);
+ break;
+ case EGRESS_PURGE_RCVD:
+ dprintk_cont("egress_purge_reply_rcvd\n");
+ egress_purge_rcvd(mesg, mpc);
+ break;
+ case MPS_DEATH:
+ dprintk_cont("mps_death\n");
+ mps_death(mesg, mpc);
+ break;
+ case CACHE_IMPOS_RCVD:
+ dprintk_cont("cache_impos_rcvd\n");
+ MPOA_cache_impos_rcvd(mesg, mpc);
+ break;
+ case SET_MPC_CTRL_ADDR:
+ dprintk_cont("set_mpc_ctrl_addr\n");
+ set_mpc_ctrl_addr_rcvd(mesg, mpc);
+ break;
+ case SET_MPS_MAC_ADDR:
+ dprintk_cont("set_mps_mac_addr\n");
+ set_mps_mac_addr_rcvd(mesg, mpc);
+ break;
+ case CLEAN_UP_AND_EXIT:
+ dprintk_cont("clean_up_and_exit\n");
+ clean_up(mesg, mpc, DIE);
+ break;
+ case RELOAD:
+ dprintk_cont("reload\n");
+ clean_up(mesg, mpc, RELOAD);
+ break;
+ case SET_MPC_PARAMS:
+ dprintk_cont("set_mpc_params\n");
+ mpc->parameters = mesg->content.params;
+ break;
+ default:
+ dprintk_cont("unknown message %d\n", mesg->type);
+ break;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+
+/* Remember that this function may not do things that sleep */
+int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc)
+{
+ struct sk_buff *skb;
+ struct sock *sk;
+
+ if (mpc == NULL || !mpc->mpoad_vcc) {
+ pr_info("mesg %d to a non-existent mpoad\n", mesg->type);
+ return -ENXIO;
+ }
+
+ skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+ skb_put(skb, sizeof(struct k_message));
+ skb_copy_to_linear_data(skb, mesg, sizeof(*mesg));
+ atm_force_charge(mpc->mpoad_vcc, skb->truesize);
+
+ sk = sk_atm(mpc->mpoad_vcc);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+
+ return 0;
+}
+
+static int mpoa_event_listener(struct notifier_block *mpoa_notifier,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct mpoa_client *mpc;
+ struct lec_priv *priv;
+
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+
+ if (strncmp(dev->name, "lec", 3))
+ return NOTIFY_DONE; /* we are only interested in lec:s */
+
+ switch (event) {
+ case NETDEV_REGISTER: /* a new lec device was allocated */
+ priv = netdev_priv(dev);
+ if (priv->lane_version < 2)
+ break;
+ priv->lane2_ops->associate_indicator = lane2_assoc_ind;
+ mpc = find_mpc_by_itfnum(priv->itfnum);
+ if (mpc == NULL) {
+ dprintk("allocating new mpc for %s\n", dev->name);
+ mpc = alloc_mpc();
+ if (mpc == NULL) {
+ pr_info("no new mpc");
+ break;
+ }
+ }
+ mpc->dev_num = priv->itfnum;
+ mpc->dev = dev;
+ dev_hold(dev);
+ dprintk("(%s) was initialized\n", dev->name);
+ break;
+ case NETDEV_UNREGISTER:
+ /* the lec device was deallocated */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ dprintk("device (%s) was deallocated\n", dev->name);
+ stop_mpc(mpc);
+ dev_put(mpc->dev);
+ mpc->dev = NULL;
+ break;
+ case NETDEV_UP:
+ /* the dev was ifconfig'ed up */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ if (mpc->mpoad_vcc != NULL)
+ start_mpc(mpc, dev);
+ break;
+ case NETDEV_DOWN:
+ /* the dev was ifconfig'ed down */
+ /* this means that the flow of packets from the
+ * upper layer stops
+ */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ if (mpc->mpoad_vcc != NULL)
+ stop_mpc(mpc);
+ break;
+ case NETDEV_REBOOT:
+ case NETDEV_CHANGE:
+ case NETDEV_CHANGEMTU:
+ case NETDEV_CHANGEADDR:
+ case NETDEV_GOING_DOWN:
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Functions which are called after a message is received from mpcd.
+ * Msg is reused on purpose.
+ */
+
+
+static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ __be32 dst_ip = msg->content.in_info.in_dst_ip;
+ in_cache_entry *entry;
+
+ entry = mpc->in_ops->get(dst_ip, mpc);
+ if (entry == NULL) {
+ entry = mpc->in_ops->add_entry(dst_ip, mpc);
+ entry->entry_state = INGRESS_RESOLVING;
+ msg->type = SND_MPOA_RES_RQST;
+ msg->content.in_info = entry->ctrl_info;
+ msg_to_mpoad(msg, mpc);
+ entry->reply_wait = ktime_get_seconds();
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ if (entry->entry_state == INGRESS_INVALID) {
+ entry->entry_state = INGRESS_RESOLVING;
+ msg->type = SND_MPOA_RES_RQST;
+ msg->content.in_info = entry->ctrl_info;
+ msg_to_mpoad(msg, mpc);
+ entry->reply_wait = ktime_get_seconds();
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ pr_info("(%s) entry already in resolving state\n",
+ (mpc->dev) ? mpc->dev->name : "<unknown>");
+ mpc->in_ops->put(entry);
+}
+
+/*
+ * Things get complicated because we have to check if there's an egress
+ * shortcut with suitable traffic parameters we could use.
+ */
+static void check_qos_and_open_shortcut(struct k_message *msg,
+ struct mpoa_client *client,
+ in_cache_entry *entry)
+{
+ __be32 dst_ip = msg->content.in_info.in_dst_ip;
+ struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip);
+ eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client);
+
+ if (eg_entry && eg_entry->shortcut) {
+ if (eg_entry->shortcut->qos.txtp.traffic_class &
+ msg->qos.txtp.traffic_class &
+ (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)) {
+ if (eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR)
+ entry->shortcut = eg_entry->shortcut;
+ else if (eg_entry->shortcut->qos.txtp.max_pcr > 0)
+ entry->shortcut = eg_entry->shortcut;
+ }
+ if (entry->shortcut) {
+ dprintk("(%s) using egress SVC to reach %pI4\n",
+ client->dev->name, &dst_ip);
+ client->eg_ops->put(eg_entry);
+ return;
+ }
+ }
+ if (eg_entry != NULL)
+ client->eg_ops->put(eg_entry);
+
+ /* No luck in the egress cache we must open an ingress SVC */
+ msg->type = OPEN_INGRESS_SVC;
+ if (qos &&
+ (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) {
+ msg->qos = qos->qos;
+ pr_info("(%s) trying to get a CBR shortcut\n",
+ client->dev->name);
+ } else
+ memset(&msg->qos, 0, sizeof(struct atm_qos));
+ msg_to_mpoad(msg, client);
+}
+
+static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ __be32 dst_ip = msg->content.in_info.in_dst_ip;
+ in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc);
+
+ dprintk("(%s) ip %pI4\n",
+ mpc->dev->name, &dst_ip);
+ ddprintk("(%s) entry = %p",
+ mpc->dev->name, entry);
+ if (entry == NULL) {
+ pr_info("(%s) ARGH, received res. reply for an entry that doesn't exist.\n",
+ mpc->dev->name);
+ return;
+ }
+ ddprintk_cont(" entry_state = %d ", entry->entry_state);
+
+ if (entry->entry_state == INGRESS_RESOLVED) {
+ pr_info("(%s) RESOLVED entry!\n", mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ entry->ctrl_info = msg->content.in_info;
+ entry->time = ktime_get_seconds();
+ /* Used in refreshing func from now on */
+ entry->reply_wait = ktime_get_seconds();
+ entry->refresh_time = 0;
+ ddprintk_cont("entry->shortcut = %p\n", entry->shortcut);
+
+ if (entry->entry_state == INGRESS_RESOLVING &&
+ entry->shortcut != NULL) {
+ entry->entry_state = INGRESS_RESOLVED;
+ mpc->in_ops->put(entry);
+ return; /* Shortcut already open... */
+ }
+
+ if (entry->shortcut != NULL) {
+ pr_info("(%s) entry->shortcut != NULL, impossible!\n",
+ mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ check_qos_and_open_shortcut(msg, mpc, entry);
+ entry->entry_state = INGRESS_RESOLVED;
+ mpc->in_ops->put(entry);
+
+ return;
+
+}
+
+static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ __be32 dst_ip = msg->content.in_info.in_dst_ip;
+ __be32 mask = msg->ip_mask;
+ in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
+
+ if (entry == NULL) {
+ pr_info("(%s) purge for a non-existing entry, ip = %pI4\n",
+ mpc->dev->name, &dst_ip);
+ return;
+ }
+
+ do {
+ dprintk("(%s) removing an ingress entry, ip = %pI4\n",
+ mpc->dev->name, &dst_ip);
+ write_lock_bh(&mpc->ingress_lock);
+ mpc->in_ops->remove_entry(entry, mpc);
+ write_unlock_bh(&mpc->ingress_lock);
+ mpc->in_ops->put(entry);
+ entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
+ } while (entry != NULL);
+}
+
+static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ __be32 cache_id = msg->content.eg_info.cache_id;
+ eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc);
+
+ if (entry == NULL) {
+ dprintk("(%s) purge for a non-existing entry\n",
+ mpc->dev->name);
+ return;
+ }
+
+ write_lock_irq(&mpc->egress_lock);
+ mpc->eg_ops->remove_entry(entry, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+
+ mpc->eg_ops->put(entry);
+}
+
+static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry)
+{
+ struct sock *sk;
+ struct k_message *purge_msg;
+ struct sk_buff *skb;
+
+ dprintk("entering\n");
+ if (vcc == NULL) {
+ pr_info("vcc == NULL\n");
+ return;
+ }
+
+ skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
+ if (skb == NULL) {
+ pr_info("out of memory\n");
+ return;
+ }
+
+ skb_put(skb, sizeof(struct k_message));
+ memset(skb->data, 0, sizeof(struct k_message));
+ purge_msg = (struct k_message *)skb->data;
+ purge_msg->type = DATA_PLANE_PURGE;
+ if (entry != NULL)
+ purge_msg->content.eg_info = entry->ctrl_info;
+
+ atm_force_charge(vcc, skb->truesize);
+
+ sk = sk_atm(vcc);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+ dprintk("exiting\n");
+}
+
+/*
+ * Our MPS died. Tell our daemon to send NHRP data plane purge to each
+ * of the egress shortcuts we have.
+ */
+static void mps_death(struct k_message *msg, struct mpoa_client *mpc)
+{
+ eg_cache_entry *entry;
+
+ dprintk("(%s)\n", mpc->dev->name);
+
+ if (memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)) {
+ pr_info("(%s) wrong MPS\n", mpc->dev->name);
+ return;
+ }
+
+ /* FIXME: This knows too much of the cache structure */
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ purge_egress_shortcut(entry->shortcut, entry);
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+}
+
+static void MPOA_cache_impos_rcvd(struct k_message *msg,
+ struct mpoa_client *mpc)
+{
+ uint16_t holding_time;
+ eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc);
+
+ holding_time = msg->content.eg_info.holding_time;
+ dprintk("(%s) entry = %p, holding_time = %u\n",
+ mpc->dev->name, entry, holding_time);
+ if (entry == NULL && holding_time) {
+ entry = mpc->eg_ops->add_entry(msg, mpc);
+ mpc->eg_ops->put(entry);
+ return;
+ }
+ if (holding_time) {
+ mpc->eg_ops->update(entry, holding_time);
+ return;
+ }
+
+ write_lock_irq(&mpc->egress_lock);
+ mpc->eg_ops->remove_entry(entry, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+
+ mpc->eg_ops->put(entry);
+}
+
+static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg,
+ struct mpoa_client *mpc)
+{
+ struct lec_priv *priv;
+ int i, retval ;
+
+ uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN];
+
+ tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */
+ tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */
+ tlv[5] = 0x02; /* MPOA client */
+ tlv[6] = 0x00; /* number of MPS MAC addresses */
+
+ memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */
+ memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN);
+
+ dprintk("(%s) setting MPC ctrl ATM address to",
+ mpc->dev ? mpc->dev->name : "<unknown>");
+ for (i = 7; i < sizeof(tlv); i++)
+ dprintk_cont(" %02x", tlv[i]);
+ dprintk_cont("\n");
+
+ if (mpc->dev) {
+ priv = netdev_priv(mpc->dev);
+ retval = priv->lane2_ops->associate_req(mpc->dev,
+ mpc->dev->dev_addr,
+ tlv, sizeof(tlv));
+ if (retval == 0)
+ pr_info("(%s) MPOA device type TLV association failed\n",
+ mpc->dev->name);
+ retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL);
+ if (retval < 0)
+ pr_info("(%s) targetless LE_ARP request failed\n",
+ mpc->dev->name);
+ }
+}
+
+static void set_mps_mac_addr_rcvd(struct k_message *msg,
+ struct mpoa_client *client)
+{
+
+ if (client->number_of_mps_macs)
+ kfree(client->mps_macs);
+ client->number_of_mps_macs = 0;
+ client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL);
+ if (client->mps_macs == NULL) {
+ pr_info("out of memory\n");
+ return;
+ }
+ client->number_of_mps_macs = 1;
+}
+
+/*
+ * purge egress cache and tell daemon to 'action' (DIE, RELOAD)
+ */
+static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action)
+{
+
+ eg_cache_entry *entry;
+ msg->type = SND_EGRESS_PURGE;
+
+
+ /* FIXME: This knows too much of the cache structure */
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ msg->content.eg_info = entry->ctrl_info;
+ dprintk("cache_id %u\n", entry->ctrl_info.cache_id);
+ msg_to_mpoad(msg, mpc);
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ msg->type = action;
+ msg_to_mpoad(msg, mpc);
+}
+
+static unsigned long checking_time;
+
+static void mpc_timer_refresh(void)
+{
+ mpc_timer.expires = jiffies + (MPC_P2 * HZ);
+ checking_time = mpc_timer.expires;
+ add_timer(&mpc_timer);
+}
+
+static void mpc_cache_check(struct timer_list *unused)
+{
+ struct mpoa_client *mpc = mpcs;
+ static unsigned long previous_resolving_check_time;
+ static unsigned long previous_refresh_time;
+
+ while (mpc != NULL) {
+ mpc->in_ops->clear_count(mpc);
+ mpc->eg_ops->clear_expired(mpc);
+ if (checking_time - previous_resolving_check_time >
+ mpc->parameters.mpc_p4 * HZ) {
+ mpc->in_ops->check_resolving(mpc);
+ previous_resolving_check_time = checking_time;
+ }
+ if (checking_time - previous_refresh_time >
+ mpc->parameters.mpc_p5 * HZ) {
+ mpc->in_ops->refresh(mpc);
+ previous_refresh_time = checking_time;
+ }
+ mpc = mpc->next;
+ }
+ mpc_timer_refresh();
+}
+
+static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ int err = 0;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA)
+ return -ENOIOCTLCMD;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case ATMMPC_CTRL:
+ err = atm_mpoa_mpoad_attach(vcc, (int)arg);
+ if (err >= 0)
+ sock->state = SS_CONNECTED;
+ break;
+ case ATMMPC_DATA:
+ err = atm_mpoa_vcc_attach(vcc, (void __user *)arg);
+ break;
+ default:
+ break;
+ }
+ return err;
+}
+
+static struct atm_ioctl atm_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = atm_mpoa_ioctl,
+};
+
+static __init int atm_mpoa_init(void)
+{
+ register_atm_ioctl(&atm_ioctl_ops);
+
+ if (mpc_proc_init() != 0)
+ pr_info("failed to initialize /proc/mpoa\n");
+
+ pr_info("mpc.c: initialized\n");
+
+ return 0;
+}
+
+static void __exit atm_mpoa_cleanup(void)
+{
+ struct mpoa_client *mpc, *tmp;
+ struct atm_mpoa_qos *qos, *nextqos;
+ struct lec_priv *priv;
+
+ mpc_proc_clean();
+
+ del_timer_sync(&mpc_timer);
+ unregister_netdevice_notifier(&mpoa_notifier);
+ deregister_atm_ioctl(&atm_ioctl_ops);
+
+ mpc = mpcs;
+ mpcs = NULL;
+ while (mpc != NULL) {
+ tmp = mpc->next;
+ if (mpc->dev != NULL) {
+ stop_mpc(mpc);
+ priv = netdev_priv(mpc->dev);
+ if (priv->lane2_ops != NULL)
+ priv->lane2_ops->associate_indicator = NULL;
+ }
+ ddprintk("about to clear caches\n");
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+ ddprintk("caches cleared\n");
+ kfree(mpc->mps_macs);
+ memset(mpc, 0, sizeof(struct mpoa_client));
+ ddprintk("about to kfree %p\n", mpc);
+ kfree(mpc);
+ ddprintk("next mpc is at %p\n", tmp);
+ mpc = tmp;
+ }
+
+ qos = qos_head;
+ qos_head = NULL;
+ while (qos != NULL) {
+ nextqos = qos->next;
+ dprintk("freeing qos entry %p\n", qos);
+ kfree(qos);
+ qos = nextqos;
+ }
+}
+
+module_init(atm_mpoa_init);
+module_exit(atm_mpoa_cleanup);
+
+MODULE_LICENSE("GPL");
diff --git a/net/atm/mpc.h b/net/atm/mpc.h
new file mode 100644
index 000000000..454abd076
--- /dev/null
+++ b/net/atm/mpc.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _MPC_H_
+#define _MPC_H_
+
+#include <linux/types.h>
+#include <linux/atm.h>
+#include <linux/atmmpc.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include "mpoa_caches.h"
+
+/* kernel -> mpc-daemon */
+int msg_to_mpoad(struct k_message *msg, struct mpoa_client *mpc);
+
+struct mpoa_client {
+ struct mpoa_client *next;
+ struct net_device *dev; /* lec in question */
+ int dev_num; /* e.g. 2 for lec2 */
+
+ struct atm_vcc *mpoad_vcc; /* control channel to mpoad */
+ uint8_t mps_ctrl_addr[ATM_ESA_LEN]; /* MPS control ATM address */
+ uint8_t our_ctrl_addr[ATM_ESA_LEN]; /* MPC's control ATM address */
+
+ rwlock_t ingress_lock;
+ const struct in_cache_ops *in_ops; /* ingress cache operations */
+ in_cache_entry *in_cache; /* the ingress cache of this MPC */
+
+ rwlock_t egress_lock;
+ const struct eg_cache_ops *eg_ops; /* egress cache operations */
+ eg_cache_entry *eg_cache; /* the egress cache of this MPC */
+
+ uint8_t *mps_macs; /* array of MPS MAC addresses, >=1 */
+ int number_of_mps_macs; /* number of the above MAC addresses */
+ struct mpc_parameters parameters; /* parameters for this client */
+
+ const struct net_device_ops *old_ops;
+ struct net_device_ops new_ops;
+};
+
+
+struct atm_mpoa_qos {
+ struct atm_mpoa_qos *next;
+ __be32 ipaddr;
+ struct atm_qos qos;
+};
+
+
+/* MPOA QoS operations */
+struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos);
+struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip);
+int atm_mpoa_delete_qos(struct atm_mpoa_qos *qos);
+
+/* Display QoS entries. This is for the procfs */
+struct seq_file;
+void atm_mpoa_disp_qos(struct seq_file *m);
+
+#ifdef CONFIG_PROC_FS
+int mpc_proc_init(void);
+void mpc_proc_clean(void);
+#else
+#define mpc_proc_init() (0)
+#define mpc_proc_clean() do { } while(0)
+#endif
+
+#endif /* _MPC_H_ */
diff --git a/net/atm/mpoa_caches.c b/net/atm/mpoa_caches.c
new file mode 100644
index 000000000..f7a2f0e41
--- /dev/null
+++ b/net/atm/mpoa_caches.c
@@ -0,0 +1,565 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/types.h>
+#include <linux/atmmpc.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+
+#include "mpoa_caches.h"
+#include "mpc.h"
+
+/*
+ * mpoa_caches.c: Implementation of ingress and egress cache
+ * handling functions
+ */
+
+#if 0
+#define dprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
+#else
+#define dprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
+ } while (0)
+#endif
+
+#if 0
+#define ddprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
+#else
+#define ddprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
+ } while (0)
+#endif
+
+static in_cache_entry *in_cache_get(__be32 dst_ip,
+ struct mpoa_client *client)
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while (entry != NULL) {
+ if (entry->ctrl_info.in_dst_ip == dst_ip) {
+ refcount_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+}
+
+static in_cache_entry *in_cache_get_with_mask(__be32 dst_ip,
+ struct mpoa_client *client,
+ __be32 mask)
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while (entry != NULL) {
+ if ((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask)) {
+ refcount_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+
+}
+
+static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc,
+ struct mpoa_client *client)
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while (entry != NULL) {
+ if (entry->shortcut == vcc) {
+ refcount_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+}
+
+static in_cache_entry *in_cache_add_entry(__be32 dst_ip,
+ struct mpoa_client *client)
+{
+ in_cache_entry *entry = kzalloc(sizeof(in_cache_entry), GFP_KERNEL);
+
+ if (entry == NULL) {
+ pr_info("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n");
+ return NULL;
+ }
+
+ dprintk("adding an ingress entry, ip = %pI4\n", &dst_ip);
+
+ refcount_set(&entry->use, 1);
+ dprintk("new_in_cache_entry: about to lock\n");
+ write_lock_bh(&client->ingress_lock);
+ entry->next = client->in_cache;
+ entry->prev = NULL;
+ if (client->in_cache != NULL)
+ client->in_cache->prev = entry;
+ client->in_cache = entry;
+
+ memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
+ entry->ctrl_info.in_dst_ip = dst_ip;
+ entry->time = ktime_get_seconds();
+ entry->retry_time = client->parameters.mpc_p4;
+ entry->count = 1;
+ entry->entry_state = INGRESS_INVALID;
+ entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT;
+ refcount_inc(&entry->use);
+
+ write_unlock_bh(&client->ingress_lock);
+ dprintk("new_in_cache_entry: unlocked\n");
+
+ return entry;
+}
+
+static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
+{
+ struct atm_mpoa_qos *qos;
+ struct k_message msg;
+
+ entry->count++;
+ if (entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL)
+ return OPEN;
+
+ if (entry->entry_state == INGRESS_REFRESHING) {
+ if (entry->count > mpc->parameters.mpc_p1) {
+ msg.type = SND_MPOA_RES_RQST;
+ msg.content.in_info = entry->ctrl_info;
+ memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL)
+ msg.qos = qos->qos;
+ msg_to_mpoad(&msg, mpc);
+ entry->reply_wait = ktime_get_seconds();
+ entry->entry_state = INGRESS_RESOLVING;
+ }
+ if (entry->shortcut != NULL)
+ return OPEN;
+ return CLOSED;
+ }
+
+ if (entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL)
+ return OPEN;
+
+ if (entry->count > mpc->parameters.mpc_p1 &&
+ entry->entry_state == INGRESS_INVALID) {
+ dprintk("(%s) threshold exceeded for ip %pI4, sending MPOA res req\n",
+ mpc->dev->name, &entry->ctrl_info.in_dst_ip);
+ entry->entry_state = INGRESS_RESOLVING;
+ msg.type = SND_MPOA_RES_RQST;
+ memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
+ msg.content.in_info = entry->ctrl_info;
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL)
+ msg.qos = qos->qos;
+ msg_to_mpoad(&msg, mpc);
+ entry->reply_wait = ktime_get_seconds();
+ }
+
+ return CLOSED;
+}
+
+static void in_cache_put(in_cache_entry *entry)
+{
+ if (refcount_dec_and_test(&entry->use)) {
+ kfree_sensitive(entry);
+ }
+}
+
+/*
+ * This should be called with write lock on
+ */
+static void in_cache_remove_entry(in_cache_entry *entry,
+ struct mpoa_client *client)
+{
+ struct atm_vcc *vcc;
+ struct k_message msg;
+
+ vcc = entry->shortcut;
+ dprintk("removing an ingress entry, ip = %pI4\n",
+ &entry->ctrl_info.in_dst_ip);
+
+ if (entry->prev != NULL)
+ entry->prev->next = entry->next;
+ else
+ client->in_cache = entry->next;
+ if (entry->next != NULL)
+ entry->next->prev = entry->prev;
+ client->in_ops->put(entry);
+ if (client->in_cache == NULL && client->eg_cache == NULL) {
+ msg.type = STOP_KEEP_ALIVE_SM;
+ msg_to_mpoad(&msg, client);
+ }
+
+ /* Check if the egress side still uses this VCC */
+ if (vcc != NULL) {
+ eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc,
+ client);
+ if (eg_entry != NULL) {
+ client->eg_ops->put(eg_entry);
+ return;
+ }
+ vcc_release_async(vcc, -EPIPE);
+ }
+}
+
+/* Call this every MPC-p2 seconds... Not exactly correct solution,
+ but an easy one... */
+static void clear_count_and_expired(struct mpoa_client *client)
+{
+ in_cache_entry *entry, *next_entry;
+ time64_t now;
+
+ now = ktime_get_seconds();
+
+ write_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while (entry != NULL) {
+ entry->count = 0;
+ next_entry = entry->next;
+ if ((now - entry->time) > entry->ctrl_info.holding_time) {
+ dprintk("holding time expired, ip = %pI4\n",
+ &entry->ctrl_info.in_dst_ip);
+ client->in_ops->remove_entry(entry, client);
+ }
+ entry = next_entry;
+ }
+ write_unlock_bh(&client->ingress_lock);
+}
+
+/* Call this every MPC-p4 seconds. */
+static void check_resolving_entries(struct mpoa_client *client)
+{
+
+ struct atm_mpoa_qos *qos;
+ in_cache_entry *entry;
+ time64_t now;
+ struct k_message msg;
+
+ now = ktime_get_seconds();
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while (entry != NULL) {
+ if (entry->entry_state == INGRESS_RESOLVING) {
+
+ if ((now - entry->hold_down)
+ < client->parameters.mpc_p6) {
+ entry = entry->next; /* Entry in hold down */
+ continue;
+ }
+ if ((now - entry->reply_wait) > entry->retry_time) {
+ entry->retry_time = MPC_C1 * (entry->retry_time);
+ /*
+ * Retry time maximum exceeded,
+ * put entry in hold down.
+ */
+ if (entry->retry_time > client->parameters.mpc_p5) {
+ entry->hold_down = ktime_get_seconds();
+ entry->retry_time = client->parameters.mpc_p4;
+ entry = entry->next;
+ continue;
+ }
+ /* Ask daemon to send a resolution request. */
+ memset(&entry->hold_down, 0, sizeof(time64_t));
+ msg.type = SND_MPOA_RES_RTRY;
+ memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN);
+ msg.content.in_info = entry->ctrl_info;
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL)
+ msg.qos = qos->qos;
+ msg_to_mpoad(&msg, client);
+ entry->reply_wait = ktime_get_seconds();
+ }
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+}
+
+/* Call this every MPC-p5 seconds. */
+static void refresh_entries(struct mpoa_client *client)
+{
+ time64_t now;
+ struct in_cache_entry *entry = client->in_cache;
+
+ ddprintk("refresh_entries\n");
+ now = ktime_get_seconds();
+
+ read_lock_bh(&client->ingress_lock);
+ while (entry != NULL) {
+ if (entry->entry_state == INGRESS_RESOLVED) {
+ if (!(entry->refresh_time))
+ entry->refresh_time = (2 * (entry->ctrl_info.holding_time))/3;
+ if ((now - entry->reply_wait) >
+ entry->refresh_time) {
+ dprintk("refreshing an entry.\n");
+ entry->entry_state = INGRESS_REFRESHING;
+
+ }
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+}
+
+static void in_destroy_cache(struct mpoa_client *mpc)
+{
+ write_lock_irq(&mpc->ingress_lock);
+ while (mpc->in_cache != NULL)
+ mpc->in_ops->remove_entry(mpc->in_cache, mpc);
+ write_unlock_irq(&mpc->ingress_lock);
+}
+
+static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id,
+ struct mpoa_client *mpc)
+{
+ eg_cache_entry *entry;
+
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ if (entry->ctrl_info.cache_id == cache_id) {
+ refcount_inc(&entry->use);
+ read_unlock_irq(&mpc->egress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ return NULL;
+}
+
+/* This can be called from any context since it saves CPU flags */
+static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc)
+{
+ unsigned long flags;
+ eg_cache_entry *entry;
+
+ read_lock_irqsave(&mpc->egress_lock, flags);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ if (entry->ctrl_info.tag == tag) {
+ refcount_inc(&entry->use);
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+
+ return NULL;
+}
+
+/* This can be called from any context since it saves CPU flags */
+static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc,
+ struct mpoa_client *mpc)
+{
+ unsigned long flags;
+ eg_cache_entry *entry;
+
+ read_lock_irqsave(&mpc->egress_lock, flags);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ if (entry->shortcut == vcc) {
+ refcount_inc(&entry->use);
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+
+ return NULL;
+}
+
+static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
+ struct mpoa_client *mpc)
+{
+ eg_cache_entry *entry;
+
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ if (entry->latest_ip_addr == ipaddr) {
+ refcount_inc(&entry->use);
+ read_unlock_irq(&mpc->egress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ return NULL;
+}
+
+static void eg_cache_put(eg_cache_entry *entry)
+{
+ if (refcount_dec_and_test(&entry->use)) {
+ kfree_sensitive(entry);
+ }
+}
+
+/*
+ * This should be called with write lock on
+ */
+static void eg_cache_remove_entry(eg_cache_entry *entry,
+ struct mpoa_client *client)
+{
+ struct atm_vcc *vcc;
+ struct k_message msg;
+
+ vcc = entry->shortcut;
+ dprintk("removing an egress entry.\n");
+ if (entry->prev != NULL)
+ entry->prev->next = entry->next;
+ else
+ client->eg_cache = entry->next;
+ if (entry->next != NULL)
+ entry->next->prev = entry->prev;
+ client->eg_ops->put(entry);
+ if (client->in_cache == NULL && client->eg_cache == NULL) {
+ msg.type = STOP_KEEP_ALIVE_SM;
+ msg_to_mpoad(&msg, client);
+ }
+
+ /* Check if the ingress side still uses this VCC */
+ if (vcc != NULL) {
+ in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client);
+ if (in_entry != NULL) {
+ client->in_ops->put(in_entry);
+ return;
+ }
+ vcc_release_async(vcc, -EPIPE);
+ }
+}
+
+static eg_cache_entry *eg_cache_add_entry(struct k_message *msg,
+ struct mpoa_client *client)
+{
+ eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL);
+
+ if (entry == NULL) {
+ pr_info("out of memory\n");
+ return NULL;
+ }
+
+ dprintk("adding an egress entry, ip = %pI4, this should be our IP\n",
+ &msg->content.eg_info.eg_dst_ip);
+
+ refcount_set(&entry->use, 1);
+ dprintk("new_eg_cache_entry: about to lock\n");
+ write_lock_irq(&client->egress_lock);
+ entry->next = client->eg_cache;
+ entry->prev = NULL;
+ if (client->eg_cache != NULL)
+ client->eg_cache->prev = entry;
+ client->eg_cache = entry;
+
+ memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
+ entry->ctrl_info = msg->content.eg_info;
+ entry->time = ktime_get_seconds();
+ entry->entry_state = EGRESS_RESOLVED;
+ dprintk("new_eg_cache_entry cache_id %u\n",
+ ntohl(entry->ctrl_info.cache_id));
+ dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip);
+ refcount_inc(&entry->use);
+
+ write_unlock_irq(&client->egress_lock);
+ dprintk("new_eg_cache_entry: unlocked\n");
+
+ return entry;
+}
+
+static void update_eg_cache_entry(eg_cache_entry *entry, uint16_t holding_time)
+{
+ entry->time = ktime_get_seconds();
+ entry->entry_state = EGRESS_RESOLVED;
+ entry->ctrl_info.holding_time = holding_time;
+}
+
+static void clear_expired(struct mpoa_client *client)
+{
+ eg_cache_entry *entry, *next_entry;
+ time64_t now;
+ struct k_message msg;
+
+ now = ktime_get_seconds();
+
+ write_lock_irq(&client->egress_lock);
+ entry = client->eg_cache;
+ while (entry != NULL) {
+ next_entry = entry->next;
+ if ((now - entry->time) > entry->ctrl_info.holding_time) {
+ msg.type = SND_EGRESS_PURGE;
+ msg.content.eg_info = entry->ctrl_info;
+ dprintk("egress_cache: holding time expired, cache_id = %u.\n",
+ ntohl(entry->ctrl_info.cache_id));
+ msg_to_mpoad(&msg, client);
+ client->eg_ops->remove_entry(entry, client);
+ }
+ entry = next_entry;
+ }
+ write_unlock_irq(&client->egress_lock);
+}
+
+static void eg_destroy_cache(struct mpoa_client *mpc)
+{
+ write_lock_irq(&mpc->egress_lock);
+ while (mpc->eg_cache != NULL)
+ mpc->eg_ops->remove_entry(mpc->eg_cache, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+}
+
+
+static const struct in_cache_ops ingress_ops = {
+ .add_entry = in_cache_add_entry,
+ .get = in_cache_get,
+ .get_with_mask = in_cache_get_with_mask,
+ .get_by_vcc = in_cache_get_by_vcc,
+ .put = in_cache_put,
+ .remove_entry = in_cache_remove_entry,
+ .cache_hit = cache_hit,
+ .clear_count = clear_count_and_expired,
+ .check_resolving = check_resolving_entries,
+ .refresh = refresh_entries,
+ .destroy_cache = in_destroy_cache
+};
+
+static const struct eg_cache_ops egress_ops = {
+ .add_entry = eg_cache_add_entry,
+ .get_by_cache_id = eg_cache_get_by_cache_id,
+ .get_by_tag = eg_cache_get_by_tag,
+ .get_by_vcc = eg_cache_get_by_vcc,
+ .get_by_src_ip = eg_cache_get_by_src_ip,
+ .put = eg_cache_put,
+ .remove_entry = eg_cache_remove_entry,
+ .update = update_eg_cache_entry,
+ .clear_expired = clear_expired,
+ .destroy_cache = eg_destroy_cache
+};
+
+void atm_mpoa_init_cache(struct mpoa_client *mpc)
+{
+ mpc->in_ops = &ingress_ops;
+ mpc->eg_ops = &egress_ops;
+}
diff --git a/net/atm/mpoa_caches.h b/net/atm/mpoa_caches.h
new file mode 100644
index 000000000..464c4c7f8
--- /dev/null
+++ b/net/atm/mpoa_caches.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef MPOA_CACHES_H
+#define MPOA_CACHES_H
+
+#include <linux/time64.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmmpc.h>
+#include <linux/refcount.h>
+
+struct mpoa_client;
+
+void atm_mpoa_init_cache(struct mpoa_client *mpc);
+
+typedef struct in_cache_entry {
+ struct in_cache_entry *next;
+ struct in_cache_entry *prev;
+ time64_t time;
+ time64_t reply_wait;
+ time64_t hold_down;
+ uint32_t packets_fwded;
+ uint16_t entry_state;
+ uint32_t retry_time;
+ uint32_t refresh_time;
+ uint32_t count;
+ struct atm_vcc *shortcut;
+ uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
+ struct in_ctrl_info ctrl_info;
+ refcount_t use;
+} in_cache_entry;
+
+struct in_cache_ops{
+ in_cache_entry *(*add_entry)(__be32 dst_ip,
+ struct mpoa_client *client);
+ in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client);
+ in_cache_entry *(*get_with_mask)(__be32 dst_ip,
+ struct mpoa_client *client,
+ __be32 mask);
+ in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,
+ struct mpoa_client *client);
+ void (*put)(in_cache_entry *entry);
+ void (*remove_entry)(in_cache_entry *delEntry,
+ struct mpoa_client *client );
+ int (*cache_hit)(in_cache_entry *entry,
+ struct mpoa_client *client);
+ void (*clear_count)(struct mpoa_client *client);
+ void (*check_resolving)(struct mpoa_client *client);
+ void (*refresh)(struct mpoa_client *client);
+ void (*destroy_cache)(struct mpoa_client *mpc);
+};
+
+typedef struct eg_cache_entry{
+ struct eg_cache_entry *next;
+ struct eg_cache_entry *prev;
+ time64_t time;
+ uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
+ struct atm_vcc *shortcut;
+ uint32_t packets_rcvd;
+ uint16_t entry_state;
+ __be32 latest_ip_addr; /* The src IP address of the last packet */
+ struct eg_ctrl_info ctrl_info;
+ refcount_t use;
+} eg_cache_entry;
+
+struct eg_cache_ops{
+ eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client);
+ void (*put)(eg_cache_entry *entry);
+ void (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);
+ void (*update)(eg_cache_entry *entry, uint16_t holding_time);
+ void (*clear_expired)(struct mpoa_client *client);
+ void (*destroy_cache)(struct mpoa_client *mpc);
+};
+
+
+/* Ingress cache entry states */
+
+#define INGRESS_REFRESHING 3
+#define INGRESS_RESOLVED 2
+#define INGRESS_RESOLVING 1
+#define INGRESS_INVALID 0
+
+/* VCC states */
+
+#define OPEN 1
+#define CLOSED 0
+
+/* Egress cache entry states */
+
+#define EGRESS_RESOLVED 2
+#define EGRESS_PURGE 1
+#define EGRESS_INVALID 0
+
+#endif
diff --git a/net/atm/mpoa_proc.c b/net/atm/mpoa_proc.c
new file mode 100644
index 000000000..aaf64b953
--- /dev/null
+++ b/net/atm/mpoa_proc.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#ifdef CONFIG_PROC_FS
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/ktime.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+#include <linux/atmmpc.h>
+#include <linux/atm.h>
+#include <linux/gfp.h>
+#include "mpc.h"
+#include "mpoa_caches.h"
+
+/*
+ * mpoa_proc.c: Implementation MPOA client's proc
+ * file system statistics
+ */
+
+#if 1
+#define dprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
+#else
+#define dprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
+ } while (0)
+#endif
+
+#if 0
+#define ddprintk(format, args...) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
+#else
+#define ddprintk(format, args...) \
+ do { if (0) \
+ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
+ } while (0)
+#endif
+
+#define STAT_FILE_NAME "mpc" /* Our statistic file's name */
+
+extern struct mpoa_client *mpcs;
+extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */
+
+static int proc_mpc_open(struct inode *inode, struct file *file);
+static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
+ size_t nbytes, loff_t *ppos);
+
+static int parse_qos(const char *buff);
+
+static const struct proc_ops mpc_proc_ops = {
+ .proc_open = proc_mpc_open,
+ .proc_read = seq_read,
+ .proc_lseek = seq_lseek,
+ .proc_write = proc_mpc_write,
+ .proc_release = seq_release,
+};
+
+/*
+ * Returns the state of an ingress cache entry as a string
+ */
+static const char *ingress_state_string(int state)
+{
+ switch (state) {
+ case INGRESS_RESOLVING:
+ return "resolving ";
+ case INGRESS_RESOLVED:
+ return "resolved ";
+ case INGRESS_INVALID:
+ return "invalid ";
+ case INGRESS_REFRESHING:
+ return "refreshing ";
+ }
+
+ return "";
+}
+
+/*
+ * Returns the state of an egress cache entry as a string
+ */
+static const char *egress_state_string(int state)
+{
+ switch (state) {
+ case EGRESS_RESOLVED:
+ return "resolved ";
+ case EGRESS_PURGE:
+ return "purge ";
+ case EGRESS_INVALID:
+ return "invalid ";
+ }
+
+ return "";
+}
+
+/*
+ * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
+ */
+
+static void *mpc_start(struct seq_file *m, loff_t *pos)
+{
+ loff_t l = *pos;
+ struct mpoa_client *mpc;
+
+ if (!l--)
+ return SEQ_START_TOKEN;
+ for (mpc = mpcs; mpc; mpc = mpc->next)
+ if (!l--)
+ return mpc;
+ return NULL;
+}
+
+static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct mpoa_client *p = v;
+ (*pos)++;
+ return v == SEQ_START_TOKEN ? mpcs : p->next;
+}
+
+static void mpc_stop(struct seq_file *m, void *v)
+{
+}
+
+/*
+ * READING function - called when the /proc/atm/mpoa file is read from.
+ */
+static int mpc_show(struct seq_file *m, void *v)
+{
+ struct mpoa_client *mpc = v;
+ int i;
+ in_cache_entry *in_entry;
+ eg_cache_entry *eg_entry;
+ time64_t now;
+ unsigned char ip_string[16];
+
+ if (v == SEQ_START_TOKEN) {
+ atm_mpoa_disp_qos(m);
+ return 0;
+ }
+
+ seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
+ seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
+ now = ktime_get_seconds();
+
+ for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
+ unsigned long seconds_delta = now - in_entry->time;
+
+ sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip);
+ seq_printf(m, "%-16s%s%-14lu%-12u",
+ ip_string,
+ ingress_state_string(in_entry->entry_state),
+ in_entry->ctrl_info.holding_time -
+ seconds_delta,
+ in_entry->packets_fwded);
+ if (in_entry->shortcut)
+ seq_printf(m, " %-3d %-3d",
+ in_entry->shortcut->vpi,
+ in_entry->shortcut->vci);
+ seq_printf(m, "\n");
+ }
+
+ seq_printf(m, "\n");
+ seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n");
+ for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
+ unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
+ unsigned long seconds_delta = now - eg_entry->time;
+
+ for (i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(m, "%02x", p[i]);
+ seq_printf(m, "\n%-16lu%s%-14lu%-15u",
+ (unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
+ egress_state_string(eg_entry->entry_state),
+ (eg_entry->ctrl_info.holding_time - seconds_delta),
+ eg_entry->packets_rcvd);
+
+ /* latest IP address */
+ sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr);
+ seq_printf(m, "%-16s", ip_string);
+
+ if (eg_entry->shortcut)
+ seq_printf(m, " %-3d %-3d",
+ eg_entry->shortcut->vpi,
+ eg_entry->shortcut->vci);
+ seq_printf(m, "\n");
+ }
+ seq_printf(m, "\n");
+ return 0;
+}
+
+static const struct seq_operations mpc_op = {
+ .start = mpc_start,
+ .next = mpc_next,
+ .stop = mpc_stop,
+ .show = mpc_show
+};
+
+static int proc_mpc_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &mpc_op);
+}
+
+static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
+ size_t nbytes, loff_t *ppos)
+{
+ char *page, *p;
+ unsigned int len;
+
+ if (nbytes == 0)
+ return 0;
+
+ if (nbytes >= PAGE_SIZE)
+ nbytes = PAGE_SIZE-1;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ for (p = page, len = 0; len < nbytes; p++) {
+ if (get_user(*p, buff++)) {
+ free_page((unsigned long)page);
+ return -EFAULT;
+ }
+ len += 1;
+ if (*p == '\0' || *p == '\n')
+ break;
+ }
+
+ *p = '\0';
+
+ if (!parse_qos(page))
+ printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
+
+ free_page((unsigned long)page);
+
+ return len;
+}
+
+static int parse_qos(const char *buff)
+{
+ /* possible lines look like this
+ * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
+ */
+ unsigned char ip[4];
+ int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
+ __be32 ipaddr;
+ struct atm_qos qos;
+
+ memset(&qos, 0, sizeof(struct atm_qos));
+
+ if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
+ ip, ip+1, ip+2, ip+3) == 4) {
+ ipaddr = *(__be32 *)ip;
+ return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
+ }
+
+ if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
+ ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
+ rx_pcr = tx_pcr;
+ rx_sdu = tx_sdu;
+ } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
+ ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
+ return 0;
+
+ ipaddr = *(__be32 *)ip;
+ qos.txtp.traffic_class = ATM_CBR;
+ qos.txtp.max_pcr = tx_pcr;
+ qos.txtp.max_sdu = tx_sdu;
+ qos.rxtp.traffic_class = ATM_CBR;
+ qos.rxtp.max_pcr = rx_pcr;
+ qos.rxtp.max_sdu = rx_sdu;
+ qos.aal = ATM_AAL5;
+ dprintk("parse_qos(): setting qos parameters to tx=%d,%d rx=%d,%d\n",
+ qos.txtp.max_pcr, qos.txtp.max_sdu,
+ qos.rxtp.max_pcr, qos.rxtp.max_sdu);
+
+ atm_mpoa_add_qos(ipaddr, &qos);
+ return 1;
+}
+
+/*
+ * INITIALIZATION function - called when module is initialized/loaded.
+ */
+int mpc_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_proc_ops);
+ if (!p) {
+ pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/*
+ * DELETING function - called when module is removed.
+ */
+void mpc_proc_clean(void)
+{
+ remove_proc_entry(STAT_FILE_NAME, atm_proc_root);
+}
+
+#endif /* CONFIG_PROC_FS */
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
new file mode 100644
index 000000000..3e4f17d33
--- /dev/null
+++ b/net/atm/pppoatm.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* net/atm/pppoatm.c - RFC2364 PPP over ATM/AAL5 */
+
+/* Copyright 1999-2000 by Mitchell Blank Jr */
+/* Based on clip.c; 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
+/* And on ppp_async.c; Copyright 1999 Paul Mackerras */
+/* And help from Jens Axboe */
+
+/*
+ *
+ * This driver provides the encapsulation and framing for sending
+ * and receiving PPP frames in ATM AAL5 PDUs.
+ */
+
+/*
+ * One shortcoming of this driver is that it does not comply with
+ * section 8 of RFC2364 - we are supposed to detect a change
+ * in encapsulation and immediately abort the connection (in order
+ * to avoid a black-hole being created if our peer loses state
+ * and changes encapsulation unilaterally. However, since the
+ * ppp_generic layer actually does the decapsulation, we need
+ * a way of notifying it when we _think_ there might be a problem)
+ * There's two cases:
+ * 1. LLC-encapsulation was missing when it was enabled. In
+ * this case, we should tell the upper layer "tear down
+ * this session if this skb looks ok to you"
+ * 2. LLC-encapsulation was present when it was disabled. Then
+ * we need to tell the upper layer "this packet may be
+ * ok, but if its in error tear down the session"
+ * These hooks are not yet available in ppp_generic
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/capability.h>
+#include <linux/ppp_defs.h>
+#include <linux/ppp-ioctl.h>
+#include <linux/ppp_channel.h>
+#include <linux/atmppp.h>
+
+#include "common.h"
+
+enum pppoatm_encaps {
+ e_autodetect = PPPOATM_ENCAPS_AUTODETECT,
+ e_vc = PPPOATM_ENCAPS_VC,
+ e_llc = PPPOATM_ENCAPS_LLC,
+};
+
+struct pppoatm_vcc {
+ struct atm_vcc *atmvcc; /* VCC descriptor */
+ void (*old_push)(struct atm_vcc *, struct sk_buff *);
+ void (*old_pop)(struct atm_vcc *, struct sk_buff *);
+ void (*old_release_cb)(struct atm_vcc *);
+ struct module *old_owner;
+ /* keep old push/pop for detaching */
+ enum pppoatm_encaps encaps;
+ atomic_t inflight;
+ unsigned long blocked;
+ int flags; /* SC_COMP_PROT - compress protocol */
+ struct ppp_channel chan; /* interface to generic ppp layer */
+ struct tasklet_struct wakeup_tasklet;
+};
+
+/*
+ * We want to allow two packets in the queue. The one that's currently in
+ * flight, and *one* queued up ready for the ATM device to send immediately
+ * from its TX done IRQ. We want to be able to use atomic_inc_not_zero(), so
+ * inflight == -2 represents an empty queue, -1 one packet, and zero means
+ * there are two packets in the queue.
+ */
+#define NONE_INFLIGHT -2
+
+#define BLOCKED 0
+
+/*
+ * Header used for LLC Encapsulated PPP (4 bytes) followed by the LCP protocol
+ * ID (0xC021) used in autodetection
+ */
+static const unsigned char pppllc[6] = { 0xFE, 0xFE, 0x03, 0xCF, 0xC0, 0x21 };
+#define LLC_LEN (4)
+
+static inline struct pppoatm_vcc *atmvcc_to_pvcc(const struct atm_vcc *atmvcc)
+{
+ return (struct pppoatm_vcc *) (atmvcc->user_back);
+}
+
+static inline struct pppoatm_vcc *chan_to_pvcc(const struct ppp_channel *chan)
+{
+ return (struct pppoatm_vcc *) (chan->private);
+}
+
+/*
+ * We can't do this directly from our _pop handler, since the ppp code
+ * doesn't want to be called in interrupt context, so we do it from
+ * a tasklet
+ */
+static void pppoatm_wakeup_sender(struct tasklet_struct *t)
+{
+ struct pppoatm_vcc *pvcc = from_tasklet(pvcc, t, wakeup_tasklet);
+
+ ppp_output_wakeup(&pvcc->chan);
+}
+
+static void pppoatm_release_cb(struct atm_vcc *atmvcc)
+{
+ struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+
+ /*
+ * As in pppoatm_pop(), it's safe to clear the BLOCKED bit here because
+ * the wakeup *can't* race with pppoatm_send(). They both hold the PPP
+ * channel's ->downl lock. And the potential race with *setting* it,
+ * which leads to the double-check dance in pppoatm_may_send(), doesn't
+ * exist here. In the sock_owned_by_user() case in pppoatm_send(), we
+ * set the BLOCKED bit while the socket is still locked. We know that
+ * ->release_cb() can't be called until that's done.
+ */
+ if (test_and_clear_bit(BLOCKED, &pvcc->blocked))
+ tasklet_schedule(&pvcc->wakeup_tasklet);
+ if (pvcc->old_release_cb)
+ pvcc->old_release_cb(atmvcc);
+}
+/*
+ * This gets called every time the ATM card has finished sending our
+ * skb. The ->old_pop will take care up normal atm flow control,
+ * but we also need to wake up the device if we blocked it
+ */
+static void pppoatm_pop(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+
+ pvcc->old_pop(atmvcc, skb);
+ atomic_dec(&pvcc->inflight);
+
+ /*
+ * We always used to run the wakeup tasklet unconditionally here, for
+ * fear of race conditions where we clear the BLOCKED flag just as we
+ * refuse another packet in pppoatm_send(). This was quite inefficient.
+ *
+ * In fact it's OK. The PPP core will only ever call pppoatm_send()
+ * while holding the channel->downl lock. And ppp_output_wakeup() as
+ * called by the tasklet will *also* grab that lock. So even if another
+ * CPU is in pppoatm_send() right now, the tasklet isn't going to race
+ * with it. The wakeup *will* happen after the other CPU is safely out
+ * of pppoatm_send() again.
+ *
+ * So if the CPU in pppoatm_send() has already set the BLOCKED bit and
+ * it about to return, that's fine. We trigger a wakeup which will
+ * happen later. And if the CPU in pppoatm_send() *hasn't* set the
+ * BLOCKED bit yet, that's fine too because of the double check in
+ * pppoatm_may_send() which is commented there.
+ */
+ if (test_and_clear_bit(BLOCKED, &pvcc->blocked))
+ tasklet_schedule(&pvcc->wakeup_tasklet);
+}
+
+/*
+ * Unbind from PPP - currently we only do this when closing the socket,
+ * but we could put this into an ioctl if need be
+ */
+static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc)
+{
+ struct pppoatm_vcc *pvcc;
+ pvcc = atmvcc_to_pvcc(atmvcc);
+ atmvcc->push = pvcc->old_push;
+ atmvcc->pop = pvcc->old_pop;
+ atmvcc->release_cb = pvcc->old_release_cb;
+ tasklet_kill(&pvcc->wakeup_tasklet);
+ ppp_unregister_channel(&pvcc->chan);
+ atmvcc->user_back = NULL;
+ kfree(pvcc);
+}
+
+/* Called when an AAL5 PDU comes in */
+static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+ pr_debug("\n");
+ if (skb == NULL) { /* VCC was closed */
+ struct module *module;
+
+ pr_debug("removing ATMPPP VCC %p\n", pvcc);
+ module = pvcc->old_owner;
+ pppoatm_unassign_vcc(atmvcc);
+ atmvcc->push(atmvcc, NULL); /* Pass along bad news */
+ module_put(module);
+ return;
+ }
+ atm_return(atmvcc, skb->truesize);
+ switch (pvcc->encaps) {
+ case e_llc:
+ if (skb->len < LLC_LEN ||
+ memcmp(skb->data, pppllc, LLC_LEN))
+ goto error;
+ skb_pull(skb, LLC_LEN);
+ break;
+ case e_autodetect:
+ if (pvcc->chan.ppp == NULL) { /* Not bound yet! */
+ kfree_skb(skb);
+ return;
+ }
+ if (skb->len >= sizeof(pppllc) &&
+ !memcmp(skb->data, pppllc, sizeof(pppllc))) {
+ pvcc->encaps = e_llc;
+ skb_pull(skb, LLC_LEN);
+ break;
+ }
+ if (skb->len >= (sizeof(pppllc) - LLC_LEN) &&
+ !memcmp(skb->data, &pppllc[LLC_LEN],
+ sizeof(pppllc) - LLC_LEN)) {
+ pvcc->encaps = e_vc;
+ pvcc->chan.mtu += LLC_LEN;
+ break;
+ }
+ pr_debug("Couldn't autodetect yet (skb: %6ph)\n", skb->data);
+ goto error;
+ case e_vc:
+ break;
+ }
+ ppp_input(&pvcc->chan, skb);
+ return;
+
+error:
+ kfree_skb(skb);
+ ppp_input_error(&pvcc->chan, 0);
+}
+
+static int pppoatm_may_send(struct pppoatm_vcc *pvcc, int size)
+{
+ /*
+ * It's not clear that we need to bother with using atm_may_send()
+ * to check we don't exceed sk->sk_sndbuf. If userspace sets a
+ * value of sk_sndbuf which is lower than the MTU, we're going to
+ * block for ever. But the code always did that before we introduced
+ * the packet count limit, so...
+ */
+ if (atm_may_send(pvcc->atmvcc, size) &&
+ atomic_inc_not_zero(&pvcc->inflight))
+ return 1;
+
+ /*
+ * We use test_and_set_bit() rather than set_bit() here because
+ * we need to ensure there's a memory barrier after it. The bit
+ * *must* be set before we do the atomic_inc() on pvcc->inflight.
+ * There's no smp_mb__after_set_bit(), so it's this or abuse
+ * smp_mb__after_atomic().
+ */
+ test_and_set_bit(BLOCKED, &pvcc->blocked);
+
+ /*
+ * We may have raced with pppoatm_pop(). If it ran for the
+ * last packet in the queue, *just* before we set the BLOCKED
+ * bit, then it might never run again and the channel could
+ * remain permanently blocked. Cope with that race by checking
+ * *again*. If it did run in that window, we'll have space on
+ * the queue now and can return success. It's harmless to leave
+ * the BLOCKED flag set, since it's only used as a trigger to
+ * run the wakeup tasklet. Another wakeup will never hurt.
+ * If pppoatm_pop() is running but hasn't got as far as making
+ * space on the queue yet, then it hasn't checked the BLOCKED
+ * flag yet either, so we're safe in that case too. It'll issue
+ * an "immediate" wakeup... where "immediate" actually involves
+ * taking the PPP channel's ->downl lock, which is held by the
+ * code path that calls pppoatm_send(), and is thus going to
+ * wait for us to finish.
+ */
+ if (atm_may_send(pvcc->atmvcc, size) &&
+ atomic_inc_not_zero(&pvcc->inflight))
+ return 1;
+
+ return 0;
+}
+/*
+ * Called by the ppp_generic.c to send a packet - returns true if packet
+ * was accepted. If we return false, then it's our job to call
+ * ppp_output_wakeup(chan) when we're feeling more up to it.
+ * Note that in the ENOMEM case (as opposed to the !atm_may_send case)
+ * we should really drop the packet, but the generic layer doesn't
+ * support this yet. We just return 'DROP_PACKET' which we actually define
+ * as success, just to be clear what we're really doing.
+ */
+#define DROP_PACKET 1
+static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = chan_to_pvcc(chan);
+ struct atm_vcc *vcc;
+ int ret;
+
+ ATM_SKB(skb)->vcc = pvcc->atmvcc;
+ pr_debug("(skb=0x%p, vcc=0x%p)\n", skb, pvcc->atmvcc);
+ if (skb->data[0] == '\0' && (pvcc->flags & SC_COMP_PROT))
+ (void) skb_pull(skb, 1);
+
+ vcc = ATM_SKB(skb)->vcc;
+ bh_lock_sock(sk_atm(vcc));
+ if (sock_owned_by_user(sk_atm(vcc))) {
+ /*
+ * Needs to happen (and be flushed, hence test_and_) before we unlock
+ * the socket. It needs to be seen by the time our ->release_cb gets
+ * called.
+ */
+ test_and_set_bit(BLOCKED, &pvcc->blocked);
+ goto nospace;
+ }
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ bh_unlock_sock(sk_atm(vcc));
+ kfree_skb(skb);
+ return DROP_PACKET;
+ }
+
+ switch (pvcc->encaps) { /* LLC encapsulation needed */
+ case e_llc:
+ if (skb_headroom(skb) < LLC_LEN) {
+ struct sk_buff *n;
+ n = skb_realloc_headroom(skb, LLC_LEN);
+ if (n != NULL &&
+ !pppoatm_may_send(pvcc, n->truesize)) {
+ kfree_skb(n);
+ goto nospace;
+ }
+ consume_skb(skb);
+ skb = n;
+ if (skb == NULL) {
+ bh_unlock_sock(sk_atm(vcc));
+ return DROP_PACKET;
+ }
+ } else if (!pppoatm_may_send(pvcc, skb->truesize))
+ goto nospace;
+ memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);
+ break;
+ case e_vc:
+ if (!pppoatm_may_send(pvcc, skb->truesize))
+ goto nospace;
+ break;
+ case e_autodetect:
+ bh_unlock_sock(sk_atm(vcc));
+ pr_debug("Trying to send without setting encaps!\n");
+ kfree_skb(skb);
+ return 1;
+ }
+
+ atm_account_tx(vcc, skb);
+ pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n",
+ skb, ATM_SKB(skb)->vcc, ATM_SKB(skb)->vcc->dev);
+ ret = ATM_SKB(skb)->vcc->send(ATM_SKB(skb)->vcc, skb)
+ ? DROP_PACKET : 1;
+ bh_unlock_sock(sk_atm(vcc));
+ return ret;
+nospace:
+ bh_unlock_sock(sk_atm(vcc));
+ /*
+ * We don't have space to send this SKB now, but we might have
+ * already applied SC_COMP_PROT compression, so may need to undo
+ */
+ if ((pvcc->flags & SC_COMP_PROT) && skb_headroom(skb) > 0 &&
+ skb->data[-1] == '\0')
+ (void) skb_push(skb, 1);
+ return 0;
+}
+
+/* This handles ioctls sent to the /dev/ppp interface */
+static int pppoatm_devppp_ioctl(struct ppp_channel *chan, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case PPPIOCGFLAGS:
+ return put_user(chan_to_pvcc(chan)->flags, (int __user *) arg)
+ ? -EFAULT : 0;
+ case PPPIOCSFLAGS:
+ return get_user(chan_to_pvcc(chan)->flags, (int __user *) arg)
+ ? -EFAULT : 0;
+ }
+ return -ENOTTY;
+}
+
+static const struct ppp_channel_ops pppoatm_ops = {
+ .start_xmit = pppoatm_send,
+ .ioctl = pppoatm_devppp_ioctl,
+};
+
+static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
+{
+ struct atm_backend_ppp be;
+ struct pppoatm_vcc *pvcc;
+ int err;
+
+ if (copy_from_user(&be, arg, sizeof be))
+ return -EFAULT;
+ if (be.encaps != PPPOATM_ENCAPS_AUTODETECT &&
+ be.encaps != PPPOATM_ENCAPS_VC && be.encaps != PPPOATM_ENCAPS_LLC)
+ return -EINVAL;
+ pvcc = kzalloc(sizeof(*pvcc), GFP_KERNEL);
+ if (pvcc == NULL)
+ return -ENOMEM;
+ pvcc->atmvcc = atmvcc;
+
+ /* Maximum is zero, so that we can use atomic_inc_not_zero() */
+ atomic_set(&pvcc->inflight, NONE_INFLIGHT);
+ pvcc->old_push = atmvcc->push;
+ pvcc->old_pop = atmvcc->pop;
+ pvcc->old_owner = atmvcc->owner;
+ pvcc->old_release_cb = atmvcc->release_cb;
+ pvcc->encaps = (enum pppoatm_encaps) be.encaps;
+ pvcc->chan.private = pvcc;
+ pvcc->chan.ops = &pppoatm_ops;
+ pvcc->chan.mtu = atmvcc->qos.txtp.max_sdu - PPP_HDRLEN -
+ (be.encaps == e_vc ? 0 : LLC_LEN);
+ tasklet_setup(&pvcc->wakeup_tasklet, pppoatm_wakeup_sender);
+ err = ppp_register_channel(&pvcc->chan);
+ if (err != 0) {
+ kfree(pvcc);
+ return err;
+ }
+ atmvcc->user_back = pvcc;
+ atmvcc->push = pppoatm_push;
+ atmvcc->pop = pppoatm_pop;
+ atmvcc->release_cb = pppoatm_release_cb;
+ __module_get(THIS_MODULE);
+ atmvcc->owner = THIS_MODULE;
+
+ /* re-process everything received between connection setup and
+ backend setup */
+ vcc_process_recv_queue(atmvcc);
+ return 0;
+}
+
+/*
+ * This handles ioctls actually performed on our vcc - we must return
+ * -ENOIOCTLCMD for any unrecognized ioctl
+ */
+static int pppoatm_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct atm_vcc *atmvcc = ATM_SD(sock);
+ void __user *argp = (void __user *)arg;
+
+ if (cmd != ATM_SETBACKEND && atmvcc->push != pppoatm_push)
+ return -ENOIOCTLCMD;
+ switch (cmd) {
+ case ATM_SETBACKEND: {
+ atm_backend_t b;
+ if (get_user(b, (atm_backend_t __user *) argp))
+ return -EFAULT;
+ if (b != ATM_BACKEND_PPP)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (sock->state != SS_CONNECTED)
+ return -EINVAL;
+ return pppoatm_assign_vcc(atmvcc, argp);
+ }
+ case PPPIOCGCHAN:
+ return put_user(ppp_channel_index(&atmvcc_to_pvcc(atmvcc)->
+ chan), (int __user *) argp) ? -EFAULT : 0;
+ case PPPIOCGUNIT:
+ return put_user(ppp_unit_number(&atmvcc_to_pvcc(atmvcc)->
+ chan), (int __user *) argp) ? -EFAULT : 0;
+ }
+ return -ENOIOCTLCMD;
+}
+
+static struct atm_ioctl pppoatm_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = pppoatm_ioctl,
+};
+
+static int __init pppoatm_init(void)
+{
+ register_atm_ioctl(&pppoatm_ioctl_ops);
+ return 0;
+}
+
+static void __exit pppoatm_exit(void)
+{
+ deregister_atm_ioctl(&pppoatm_ioctl_ops);
+}
+
+module_init(pppoatm_init);
+module_exit(pppoatm_exit);
+
+MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>");
+MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5");
+MODULE_LICENSE("GPL");
diff --git a/net/atm/proc.c b/net/atm/proc.c
new file mode 100644
index 000000000..9bf736290
--- /dev/null
+++ b/net/atm/proc.c
@@ -0,0 +1,400 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/proc.c - ATM /proc interface
+ *
+ * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
+ *
+ * seq_file api usage by romieu@fr.zoreil.com
+ *
+ * Evaluating the efficiency of the whole thing if left as an exercise to
+ * the reader.
+ */
+
+#include <linux/module.h> /* for EXPORT_SYMBOL */
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <linux/atmclip.h>
+#include <linux/init.h> /* for __init */
+#include <linux/slab.h>
+#include <net/net_namespace.h>
+#include <net/atmclip.h>
+#include <linux/uaccess.h>
+#include <linux/param.h> /* for HZ */
+#include <linux/atomic.h>
+#include "resources.h"
+#include "common.h" /* atm_proc_init prototype */
+#include "signaling.h" /* to get sigd - ugly too */
+
+static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos);
+
+static const struct proc_ops atm_dev_proc_ops = {
+ .proc_read = proc_dev_atm_read,
+ .proc_lseek = noop_llseek,
+};
+
+static void add_stats(struct seq_file *seq, const char *aal,
+ const struct k_atm_aal_stats *stats)
+{
+ seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
+ atomic_read(&stats->tx), atomic_read(&stats->tx_err),
+ atomic_read(&stats->rx), atomic_read(&stats->rx_err),
+ atomic_read(&stats->rx_drop));
+}
+
+static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
+{
+ int i;
+
+ seq_printf(seq, "%3d %-8s", dev->number, dev->type);
+ for (i = 0; i < ESI_LEN; i++)
+ seq_printf(seq, "%02x", dev->esi[i]);
+ seq_puts(seq, " ");
+ add_stats(seq, "0", &dev->stats.aal0);
+ seq_puts(seq, " ");
+ add_stats(seq, "5", &dev->stats.aal5);
+ seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt));
+ seq_putc(seq, '\n');
+}
+
+struct vcc_state {
+ int bucket;
+ struct sock *sk;
+};
+
+static inline int compare_family(struct sock *sk, int family)
+{
+ return !family || (sk->sk_family == family);
+}
+
+static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
+{
+ struct sock *sk = *sock;
+
+ if (sk == SEQ_START_TOKEN) {
+ for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
+ struct hlist_head *head = &vcc_hash[*bucket];
+
+ sk = hlist_empty(head) ? NULL : __sk_head(head);
+ if (sk)
+ break;
+ }
+ l--;
+ }
+try_again:
+ for (; sk; sk = sk_next(sk)) {
+ l -= compare_family(sk, family);
+ if (l < 0)
+ goto out;
+ }
+ if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
+ sk = sk_head(&vcc_hash[*bucket]);
+ goto try_again;
+ }
+ sk = SEQ_START_TOKEN;
+out:
+ *sock = sk;
+ return (l < 0);
+}
+
+static inline void *vcc_walk(struct seq_file *seq, loff_t l)
+{
+ struct vcc_state *state = seq->private;
+ int family = (uintptr_t)(pde_data(file_inode(seq->file)));
+
+ return __vcc_walk(&state->sk, family, &state->bucket, l) ?
+ state : NULL;
+}
+
+static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
+ __acquires(vcc_sklist_lock)
+{
+ struct vcc_state *state = seq->private;
+ loff_t left = *pos;
+
+ read_lock(&vcc_sklist_lock);
+ state->sk = SEQ_START_TOKEN;
+ return left ? vcc_walk(seq, left) : SEQ_START_TOKEN;
+}
+
+static void vcc_seq_stop(struct seq_file *seq, void *v)
+ __releases(vcc_sklist_lock)
+{
+ read_unlock(&vcc_sklist_lock);
+}
+
+static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ v = vcc_walk(seq, 1);
+ (*pos)++;
+ return v;
+}
+
+static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ static const char *const class_name[] = {
+ "off", "UBR", "CBR", "VBR", "ABR"};
+ static const char *const aal_name[] = {
+ "---", "1", "2", "3/4", /* 0- 3 */
+ "???", "5", "???", "???", /* 4- 7 */
+ "???", "???", "???", "???", /* 8-11 */
+ "???", "0", "???", "???"}; /* 12-15 */
+
+ seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
+ vcc->dev->number, vcc->vpi, vcc->vci,
+ vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" :
+ aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr,
+ class_name[vcc->qos.rxtp.traffic_class],
+ vcc->qos.txtp.min_pcr,
+ class_name[vcc->qos.txtp.traffic_class]);
+ if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+ struct net_device *dev;
+
+ dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
+ seq_printf(seq, "CLIP, Itf:%s, Encap:",
+ dev ? dev->name : "none?");
+ seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
+ }
+ seq_putc(seq, '\n');
+}
+
+static const char *vcc_state(struct atm_vcc *vcc)
+{
+ static const char *const map[] = { ATM_VS2TXT_MAP };
+
+ return map[ATM_VF2VS(vcc->flags)];
+}
+
+static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ seq_printf(seq, "%pK ", vcc);
+ if (!vcc->dev)
+ seq_printf(seq, "Unassigned ");
+ else
+ seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
+ vcc->vci);
+ switch (sk->sk_family) {
+ case AF_ATMPVC:
+ seq_printf(seq, "PVC");
+ break;
+ case AF_ATMSVC:
+ seq_printf(seq, "SVC");
+ break;
+ default:
+ seq_printf(seq, "%3d", sk->sk_family);
+ }
+ seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n",
+ vcc->flags, sk->sk_err,
+ sk_wmem_alloc_get(sk), sk->sk_sndbuf,
+ sk_rmem_alloc_get(sk), sk->sk_rcvbuf,
+ refcount_read(&sk->sk_refcnt));
+}
+
+static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ if (!vcc->dev)
+ seq_printf(seq, sizeof(void *) == 4 ?
+ "N/A@%pK%10s" : "N/A@%pK%2s", vcc, "");
+ else
+ seq_printf(seq, "%3d %3d %5d ",
+ vcc->dev->number, vcc->vpi, vcc->vci);
+ seq_printf(seq, "%-10s ", vcc_state(vcc));
+ seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
+ *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
+ if (*vcc->remote.sas_addr.prv) {
+ int i;
+
+ for (i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
+ }
+ seq_putc(seq, '\n');
+}
+
+static int atm_dev_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_dev_banner[] =
+ "Itf Type ESI/\"MAC\"addr "
+ "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
+
+ if (v == &atm_devs)
+ seq_puts(seq, atm_dev_banner);
+ else {
+ struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
+
+ atm_dev_info(seq, dev);
+ }
+ return 0;
+}
+
+static const struct seq_operations atm_dev_seq_ops = {
+ .start = atm_dev_seq_start,
+ .next = atm_dev_seq_next,
+ .stop = atm_dev_seq_stop,
+ .show = atm_dev_seq_show,
+};
+
+static int pvc_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_pvc_banner[] =
+ "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq, atm_pvc_banner);
+ else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ pvc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static const struct seq_operations pvc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = pvc_seq_show,
+};
+
+static int vcc_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
+ "Address ", "Itf VPI VCI Fam Flags Reply "
+ "Send buffer Recv buffer [refcnt]\n");
+ } else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ vcc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static const struct seq_operations vcc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = vcc_seq_show,
+};
+
+static int svc_seq_show(struct seq_file *seq, void *v)
+{
+ static const char atm_svc_banner[] =
+ "Itf VPI VCI State Remote\n";
+
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq, atm_svc_banner);
+ else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ svc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static const struct seq_operations svc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = svc_seq_show,
+};
+
+static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct atm_dev *dev;
+ unsigned long page;
+ int length;
+
+ if (count == 0)
+ return 0;
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ dev = pde_data(file_inode(file));
+ if (!dev->ops->proc_read)
+ length = -EINVAL;
+ else {
+ length = dev->ops->proc_read(dev, pos, (char *)page);
+ if (length > count)
+ length = -EINVAL;
+ }
+ if (length >= 0) {
+ if (copy_to_user(buf, (char *)page, length))
+ length = -EFAULT;
+ (*pos)++;
+ }
+ free_page(page);
+ return length;
+}
+
+struct proc_dir_entry *atm_proc_root;
+EXPORT_SYMBOL(atm_proc_root);
+
+
+int atm_proc_dev_register(struct atm_dev *dev)
+{
+ int error;
+
+ /* No proc info */
+ if (!dev->ops->proc_read)
+ return 0;
+
+ error = -ENOMEM;
+ dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number);
+ if (!dev->proc_name)
+ goto err_out;
+
+ dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root,
+ &atm_dev_proc_ops, dev);
+ if (!dev->proc_entry)
+ goto err_free_name;
+ return 0;
+
+err_free_name:
+ kfree(dev->proc_name);
+err_out:
+ return error;
+}
+
+void atm_proc_dev_deregister(struct atm_dev *dev)
+{
+ if (!dev->ops->proc_read)
+ return;
+
+ remove_proc_entry(dev->proc_name, atm_proc_root);
+ kfree(dev->proc_name);
+}
+
+int __init atm_proc_init(void)
+{
+ atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net);
+ if (!atm_proc_root)
+ return -ENOMEM;
+ proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops);
+ proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops,
+ sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC);
+ proc_create_seq_private("svc", 0444, atm_proc_root, &svc_seq_ops,
+ sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMSVC);
+ proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops,
+ sizeof(struct vcc_state), NULL);
+ return 0;
+}
+
+void atm_proc_exit(void)
+{
+ remove_proc_subtree("atm", init_net.proc_net);
+}
diff --git a/net/atm/protocols.h b/net/atm/protocols.h
new file mode 100644
index 000000000..18d4d008b
--- /dev/null
+++ b/net/atm/protocols.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* net/atm/protocols.h - ATM protocol handler entry points */
+
+/* Written 1995-1997 by Werner Almesberger, EPFL LRC */
+
+
+#ifndef NET_ATM_PROTOCOLS_H
+#define NET_ATM_PROTOCOLS_H
+
+int atm_init_aal0(struct atm_vcc *vcc); /* "raw" AAL0 */
+int atm_init_aal34(struct atm_vcc *vcc);/* "raw" AAL3/4 transport */
+int atm_init_aal5(struct atm_vcc *vcc); /* "raw" AAL5 transport */
+
+#endif
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
new file mode 100644
index 000000000..66d9a9bd5
--- /dev/null
+++ b/net/atm/pvc.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/pvc.c - ATM PVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h> /* ATM devices */
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <linux/export.h>
+#include <net/sock.h> /* for sock_no_* */
+
+#include "resources.h" /* devs and vccs */
+#include "common.h" /* common for PVCs and SVCs */
+
+
+static int pvc_shutdown(struct socket *sock, int how)
+{
+ return 0;
+}
+
+static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len)
+{
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmpvc *addr;
+ struct atm_vcc *vcc;
+ int error;
+
+ if (sockaddr_len != sizeof(struct sockaddr_atmpvc))
+ return -EINVAL;
+ addr = (struct sockaddr_atmpvc *)sockaddr;
+ if (addr->sap_family != AF_ATMPVC)
+ return -EAFNOSUPPORT;
+ lock_sock(sk);
+ vcc = ATM_SD(sock);
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) {
+ if (vcc->vpi != ATM_VPI_UNSPEC)
+ addr->sap_addr.vpi = vcc->vpi;
+ if (vcc->vci != ATM_VCI_UNSPEC)
+ addr->sap_addr.vci = vcc->vci;
+ }
+ error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
+ addr->sap_addr.vci);
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ return pvc_bind(sock, sockaddr, sockaddr_len);
+}
+
+static int pvc_setsockopt(struct socket *sock, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ int error;
+
+ lock_sock(sk);
+ error = vcc_setsockopt(sock, level, optname, optval, optlen);
+ release_sock(sk);
+ return error;
+}
+
+static int pvc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int error;
+
+ lock_sock(sk);
+ error = vcc_getsockopt(sock, level, optname, optval, optlen);
+ release_sock(sk);
+ return error;
+}
+
+static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
+ int peer)
+{
+ struct sockaddr_atmpvc *addr;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
+ return -ENOTCONN;
+ addr = (struct sockaddr_atmpvc *)sockaddr;
+ memset(addr, 0, sizeof(*addr));
+ addr->sap_family = AF_ATMPVC;
+ addr->sap_addr.itf = vcc->dev->number;
+ addr->sap_addr.vpi = vcc->vpi;
+ addr->sap_addr.vci = vcc->vci;
+ return sizeof(struct sockaddr_atmpvc);
+}
+
+static const struct proto_ops pvc_proto_ops = {
+ .family = PF_ATMPVC,
+ .owner = THIS_MODULE,
+
+ .release = vcc_release,
+ .bind = pvc_bind,
+ .connect = pvc_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = pvc_getname,
+ .poll = vcc_poll,
+ .ioctl = vcc_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = vcc_compat_ioctl,
+#endif
+ .gettstamp = sock_gettstamp,
+ .listen = sock_no_listen,
+ .shutdown = pvc_shutdown,
+ .setsockopt = pvc_setsockopt,
+ .getsockopt = pvc_getsockopt,
+ .sendmsg = vcc_sendmsg,
+ .recvmsg = vcc_recvmsg,
+ .mmap = sock_no_mmap,
+};
+
+
+static int pvc_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
+ sock->ops = &pvc_proto_ops;
+ return vcc_create(net, sock, protocol, PF_ATMPVC, kern);
+}
+
+static const struct net_proto_family pvc_family_ops = {
+ .family = PF_ATMPVC,
+ .create = pvc_create,
+ .owner = THIS_MODULE,
+};
+
+
+/*
+ * Initialize the ATM PVC protocol family
+ */
+
+
+int __init atmpvc_init(void)
+{
+ return sock_register(&pvc_family_ops);
+}
+
+void atmpvc_exit(void)
+{
+ sock_unregister(PF_ATMPVC);
+}
diff --git a/net/atm/raw.c b/net/atm/raw.c
new file mode 100644
index 000000000..2b5f78a7e
--- /dev/null
+++ b/net/atm/raw.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/atmdev.h>
+#include <linux/capability.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+
+#include "common.h"
+#include "protocols.h"
+
+/*
+ * SKB == NULL indicates that the link is being closed
+ */
+
+static void atm_push_raw(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ if (skb) {
+ struct sock *sk = sk_atm(vcc);
+
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk);
+ }
+}
+
+static void atm_pop_raw(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ pr_debug("(%d) %d -= %d\n",
+ vcc->vci, sk_wmem_alloc_get(sk), ATM_SKB(skb)->acct_truesize);
+ WARN_ON(refcount_sub_and_test(ATM_SKB(skb)->acct_truesize, &sk->sk_wmem_alloc));
+ dev_kfree_skb_any(skb);
+ sk->sk_write_space(sk);
+}
+
+static int atm_send_aal0(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ /*
+ * Note that if vpi/vci are _ANY or _UNSPEC the below will
+ * still work
+ */
+ if (!capable(CAP_NET_ADMIN) &&
+ (((u32 *)skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
+ ((vcc->vpi << ATM_HDR_VPI_SHIFT) |
+ (vcc->vci << ATM_HDR_VCI_SHIFT))) {
+ kfree_skb(skb);
+ return -EADDRNOTAVAIL;
+ }
+ if (vcc->dev->ops->send_bh)
+ return vcc->dev->ops->send_bh(vcc, skb);
+ return vcc->dev->ops->send(vcc, skb);
+}
+
+int atm_init_aal0(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ vcc->send = atm_send_aal0;
+ return 0;
+}
+
+int atm_init_aal34(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ if (vcc->dev->ops->send_bh)
+ vcc->send = vcc->dev->ops->send_bh;
+ else
+ vcc->send = vcc->dev->ops->send;
+ return 0;
+}
+
+int atm_init_aal5(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ if (vcc->dev->ops->send_bh)
+ vcc->send = vcc->dev->ops->send_bh;
+ else
+ vcc->send = vcc->dev->ops->send;
+ return 0;
+}
+EXPORT_SYMBOL(atm_init_aal5);
diff --git a/net/atm/resources.c b/net/atm/resources.c
new file mode 100644
index 000000000..995d29e7f
--- /dev/null
+++ b/net/atm/resources.c
@@ -0,0 +1,419 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/resources.c - Statically allocated resources */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+/* Fixes
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * 2002/01 - don't free the whole struct sock on sk->destruct time,
+ * use the default destruct function initialized by sock_init_data */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/kernel.h> /* for barrier */
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/capability.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include <net/sock.h> /* for struct sock */
+
+#include "common.h"
+#include "resources.h"
+#include "addr.h"
+
+
+LIST_HEAD(atm_devs);
+DEFINE_MUTEX(atm_dev_mutex);
+
+static struct atm_dev *__alloc_atm_dev(const char *type)
+{
+ struct atm_dev *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+ dev->type = type;
+ dev->signal = ATM_PHY_SIG_UNKNOWN;
+ dev->link_rate = ATM_OC3_PCR;
+ spin_lock_init(&dev->lock);
+ INIT_LIST_HEAD(&dev->local);
+ INIT_LIST_HEAD(&dev->lecs);
+
+ return dev;
+}
+
+static struct atm_dev *__atm_dev_lookup(int number)
+{
+ struct atm_dev *dev;
+
+ list_for_each_entry(dev, &atm_devs, dev_list) {
+ if (dev->number == number) {
+ atm_dev_hold(dev);
+ return dev;
+ }
+ }
+ return NULL;
+}
+
+struct atm_dev *atm_dev_lookup(int number)
+{
+ struct atm_dev *dev;
+
+ mutex_lock(&atm_dev_mutex);
+ dev = __atm_dev_lookup(number);
+ mutex_unlock(&atm_dev_mutex);
+ return dev;
+}
+EXPORT_SYMBOL(atm_dev_lookup);
+
+struct atm_dev *atm_dev_register(const char *type, struct device *parent,
+ const struct atmdev_ops *ops, int number,
+ unsigned long *flags)
+{
+ struct atm_dev *dev, *inuse;
+
+ dev = __alloc_atm_dev(type);
+ if (!dev) {
+ pr_err("no space for dev %s\n", type);
+ return NULL;
+ }
+ mutex_lock(&atm_dev_mutex);
+ if (number != -1) {
+ inuse = __atm_dev_lookup(number);
+ if (inuse) {
+ atm_dev_put(inuse);
+ mutex_unlock(&atm_dev_mutex);
+ kfree(dev);
+ return NULL;
+ }
+ dev->number = number;
+ } else {
+ dev->number = 0;
+ while ((inuse = __atm_dev_lookup(dev->number))) {
+ atm_dev_put(inuse);
+ dev->number++;
+ }
+ }
+
+ dev->ops = ops;
+ if (flags)
+ dev->flags = *flags;
+ else
+ memset(&dev->flags, 0, sizeof(dev->flags));
+ memset(&dev->stats, 0, sizeof(dev->stats));
+ refcount_set(&dev->refcnt, 1);
+
+ if (atm_proc_dev_register(dev) < 0) {
+ pr_err("atm_proc_dev_register failed for dev %s\n", type);
+ goto out_fail;
+ }
+
+ if (atm_register_sysfs(dev, parent) < 0) {
+ pr_err("atm_register_sysfs failed for dev %s\n", type);
+ atm_proc_dev_deregister(dev);
+ goto out_fail;
+ }
+
+ list_add_tail(&dev->dev_list, &atm_devs);
+
+out:
+ mutex_unlock(&atm_dev_mutex);
+ return dev;
+
+out_fail:
+ kfree(dev);
+ dev = NULL;
+ goto out;
+}
+EXPORT_SYMBOL(atm_dev_register);
+
+void atm_dev_deregister(struct atm_dev *dev)
+{
+ BUG_ON(test_bit(ATM_DF_REMOVED, &dev->flags));
+ set_bit(ATM_DF_REMOVED, &dev->flags);
+
+ /*
+ * if we remove current device from atm_devs list, new device
+ * with same number can appear, such we need deregister proc,
+ * release async all vccs and remove them from vccs list too
+ */
+ mutex_lock(&atm_dev_mutex);
+ list_del(&dev->dev_list);
+ mutex_unlock(&atm_dev_mutex);
+
+ atm_dev_release_vccs(dev);
+ atm_unregister_sysfs(dev);
+ atm_proc_dev_deregister(dev);
+
+ atm_dev_put(dev);
+}
+EXPORT_SYMBOL(atm_dev_deregister);
+
+static void copy_aal_stats(struct k_atm_aal_stats *from,
+ struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
+ __AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+static void subtract_aal_stats(struct k_atm_aal_stats *from,
+ struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
+ __AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg,
+ int zero)
+{
+ struct atm_dev_stats tmp;
+ int error = 0;
+
+ copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
+ copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
+ copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
+ if (arg)
+ error = copy_to_user(arg, &tmp, sizeof(tmp));
+ if (zero && !error) {
+ subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
+ subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
+ subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
+ }
+ return error ? -EFAULT : 0;
+}
+
+int atm_getnames(void __user *buf, int __user *iobuf_len)
+{
+ int error, len, size = 0;
+ struct atm_dev *dev;
+ struct list_head *p;
+ int *tmp_buf, *tmp_p;
+
+ if (get_user(len, iobuf_len))
+ return -EFAULT;
+ mutex_lock(&atm_dev_mutex);
+ list_for_each(p, &atm_devs)
+ size += sizeof(int);
+ if (size > len) {
+ mutex_unlock(&atm_dev_mutex);
+ return -E2BIG;
+ }
+ tmp_buf = kmalloc(size, GFP_ATOMIC);
+ if (!tmp_buf) {
+ mutex_unlock(&atm_dev_mutex);
+ return -ENOMEM;
+ }
+ tmp_p = tmp_buf;
+ list_for_each_entry(dev, &atm_devs, dev_list) {
+ *tmp_p++ = dev->number;
+ }
+ mutex_unlock(&atm_dev_mutex);
+ error = ((copy_to_user(buf, tmp_buf, size)) ||
+ put_user(size, iobuf_len))
+ ? -EFAULT : 0;
+ kfree(tmp_buf);
+ return error;
+}
+
+int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
+ int number, int compat)
+{
+ int error, len, size = 0;
+ struct atm_dev *dev;
+
+ if (get_user(len, sioc_len))
+ return -EFAULT;
+
+ dev = try_then_request_module(atm_dev_lookup(number), "atm-device-%d",
+ number);
+ if (!dev)
+ return -ENODEV;
+
+ switch (cmd) {
+ case ATM_GETTYPE:
+ size = strlen(dev->type) + 1;
+ if (copy_to_user(buf, dev->type, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_GETESI:
+ size = ESI_LEN;
+ if (copy_to_user(buf, dev->esi, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_SETESI:
+ {
+ int i;
+
+ for (i = 0; i < ESI_LEN; i++)
+ if (dev->esi[i]) {
+ error = -EEXIST;
+ goto done;
+ }
+ }
+ fallthrough;
+ case ATM_SETESIF:
+ {
+ unsigned char esi[ESI_LEN];
+
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ if (copy_from_user(esi, buf, ESI_LEN)) {
+ error = -EFAULT;
+ goto done;
+ }
+ memcpy(dev->esi, esi, ESI_LEN);
+ error = ESI_LEN;
+ goto done;
+ }
+ case ATM_GETSTATZ:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ fallthrough;
+ case ATM_GETSTAT:
+ size = sizeof(struct atm_dev_stats);
+ error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
+ if (error)
+ goto done;
+ break;
+ case ATM_GETCIRANGE:
+ size = sizeof(struct atm_cirange);
+ if (copy_to_user(buf, &dev->ci_range, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_GETLINKRATE:
+ size = sizeof(int);
+ if (copy_to_user(buf, &dev->link_rate, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_RSTADDR:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ atm_reset_addr(dev, ATM_ADDR_LOCAL);
+ break;
+ case ATM_ADDADDR:
+ case ATM_DELADDR:
+ case ATM_ADDLECSADDR:
+ case ATM_DELLECSADDR:
+ {
+ struct sockaddr_atmsvc addr;
+
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+
+ if (copy_from_user(&addr, buf, sizeof(addr))) {
+ error = -EFAULT;
+ goto done;
+ }
+ if (cmd == ATM_ADDADDR || cmd == ATM_ADDLECSADDR)
+ error = atm_add_addr(dev, &addr,
+ (cmd == ATM_ADDADDR ?
+ ATM_ADDR_LOCAL : ATM_ADDR_LECS));
+ else
+ error = atm_del_addr(dev, &addr,
+ (cmd == ATM_DELADDR ?
+ ATM_ADDR_LOCAL : ATM_ADDR_LECS));
+ goto done;
+ }
+ case ATM_GETADDR:
+ case ATM_GETLECSADDR:
+ error = atm_get_addr(dev, buf, len,
+ (cmd == ATM_GETADDR ?
+ ATM_ADDR_LOCAL : ATM_ADDR_LECS));
+ if (error < 0)
+ goto done;
+ size = error;
+ /* may return 0, but later on size == 0 means "don't
+ write the length" */
+ error = put_user(size, sioc_len) ? -EFAULT : 0;
+ goto done;
+ case ATM_SETLOOP:
+ if (__ATM_LM_XTRMT((int) (unsigned long) buf) &&
+ __ATM_LM_XTLOC((int) (unsigned long) buf) >
+ __ATM_LM_XTRMT((int) (unsigned long) buf)) {
+ error = -EINVAL;
+ goto done;
+ }
+ fallthrough;
+ case ATM_SETCIRANGE:
+ case SONET_GETSTATZ:
+ case SONET_SETDIAG:
+ case SONET_CLRDIAG:
+ case SONET_SETFRAMING:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ fallthrough;
+ default:
+ if (IS_ENABLED(CONFIG_COMPAT) && compat) {
+#ifdef CONFIG_COMPAT
+ if (!dev->ops->compat_ioctl) {
+ error = -EINVAL;
+ goto done;
+ }
+ size = dev->ops->compat_ioctl(dev, cmd, buf);
+#endif
+ } else {
+ if (!dev->ops->ioctl) {
+ error = -EINVAL;
+ goto done;
+ }
+ size = dev->ops->ioctl(dev, cmd, buf);
+ }
+ if (size < 0) {
+ error = (size == -ENOIOCTLCMD ? -ENOTTY : size);
+ goto done;
+ }
+ }
+
+ if (size)
+ error = put_user(size, sioc_len) ? -EFAULT : 0;
+ else
+ error = 0;
+done:
+ atm_dev_put(dev);
+ return error;
+}
+
+#ifdef CONFIG_PROC_FS
+void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ mutex_lock(&atm_dev_mutex);
+ return seq_list_start_head(&atm_devs, *pos);
+}
+
+void atm_dev_seq_stop(struct seq_file *seq, void *v)
+{
+ mutex_unlock(&atm_dev_mutex);
+}
+
+void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return seq_list_next(v, &atm_devs, pos);
+}
+#endif
diff --git a/net/atm/resources.h b/net/atm/resources.h
new file mode 100644
index 000000000..4a0839e92
--- /dev/null
+++ b/net/atm/resources.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* net/atm/resources.h - ATM-related resources */
+
+/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_RESOURCES_H
+#define NET_ATM_RESOURCES_H
+
+#include <linux/atmdev.h>
+#include <linux/mutex.h>
+
+
+extern struct list_head atm_devs;
+extern struct mutex atm_dev_mutex;
+
+int atm_getnames(void __user *buf, int __user *iobuf_len);
+int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
+ int number, int compat);
+
+#ifdef CONFIG_PROC_FS
+
+#include <linux/proc_fs.h>
+
+void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
+void atm_dev_seq_stop(struct seq_file *seq, void *v);
+void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+
+
+int atm_proc_dev_register(struct atm_dev *dev);
+void atm_proc_dev_deregister(struct atm_dev *dev);
+
+#else
+
+static inline int atm_proc_dev_register(struct atm_dev *dev)
+{
+ return 0;
+}
+
+static inline void atm_proc_dev_deregister(struct atm_dev *dev)
+{
+ /* nothing */
+}
+
+#endif /* CONFIG_PROC_FS */
+
+int atm_register_sysfs(struct atm_dev *adev, struct device *parent);
+void atm_unregister_sysfs(struct atm_dev *adev);
+#endif
diff --git a/net/atm/signaling.c b/net/atm/signaling.c
new file mode 100644
index 000000000..e70ae2c11
--- /dev/null
+++ b/net/atm/signaling.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/signaling.c - ATM signaling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h> /* jiffies and HZ */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+
+#include "resources.h"
+#include "signaling.h"
+
+struct atm_vcc *sigd = NULL;
+
+static void sigd_put_skb(struct sk_buff *skb)
+{
+ if (!sigd) {
+ pr_debug("atmsvc: no signaling daemon\n");
+ kfree_skb(skb);
+ return;
+ }
+ atm_force_charge(sigd, skb->truesize);
+ skb_queue_tail(&sk_atm(sigd)->sk_receive_queue, skb);
+ sk_atm(sigd)->sk_data_ready(sk_atm(sigd));
+}
+
+static void modify_qos(struct atm_vcc *vcc, struct atmsvc_msg *msg)
+{
+ struct sk_buff *skb;
+
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags))
+ return;
+ msg->type = as_error;
+ if (!vcc->dev->ops->change_qos)
+ msg->reply = -EOPNOTSUPP;
+ else {
+ /* should lock VCC */
+ msg->reply = vcc->dev->ops->change_qos(vcc, &msg->qos,
+ msg->reply);
+ if (!msg->reply)
+ msg->type = as_okay;
+ }
+ /*
+ * Should probably just turn around the old skb. But then, the buffer
+ * space accounting needs to follow the change too. Maybe later.
+ */
+ while (!(skb = alloc_skb(sizeof(struct atmsvc_msg), GFP_KERNEL)))
+ schedule();
+ *(struct atmsvc_msg *)skb_put(skb, sizeof(struct atmsvc_msg)) = *msg;
+ sigd_put_skb(skb);
+}
+
+static int sigd_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct atmsvc_msg *msg;
+ struct atm_vcc *session_vcc;
+ struct sock *sk;
+
+ msg = (struct atmsvc_msg *) skb->data;
+ WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc));
+ vcc = *(struct atm_vcc **) &msg->vcc;
+ pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc);
+ sk = sk_atm(vcc);
+
+ switch (msg->type) {
+ case as_okay:
+ sk->sk_err = -msg->reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ if (!*vcc->local.sas_addr.prv && !*vcc->local.sas_addr.pub) {
+ vcc->local.sas_family = AF_ATMSVC;
+ memcpy(vcc->local.sas_addr.prv,
+ msg->local.sas_addr.prv, ATM_ESA_LEN);
+ memcpy(vcc->local.sas_addr.pub,
+ msg->local.sas_addr.pub, ATM_E164_LEN + 1);
+ }
+ session_vcc = vcc->session ? vcc->session : vcc;
+ if (session_vcc->vpi || session_vcc->vci)
+ break;
+ session_vcc->itf = msg->pvc.sap_addr.itf;
+ session_vcc->vpi = msg->pvc.sap_addr.vpi;
+ session_vcc->vci = msg->pvc.sap_addr.vci;
+ if (session_vcc->vpi || session_vcc->vci)
+ session_vcc->qos = msg->qos;
+ break;
+ case as_error:
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ sk->sk_err = -msg->reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ break;
+ case as_indicate:
+ vcc = *(struct atm_vcc **)&msg->listen_vcc;
+ sk = sk_atm(vcc);
+ pr_debug("as_indicate!!!\n");
+ lock_sock(sk);
+ if (sk_acceptq_is_full(sk)) {
+ sigd_enq(NULL, as_reject, vcc, NULL, NULL);
+ dev_kfree_skb(skb);
+ goto as_indicate_complete;
+ }
+ sk_acceptq_added(sk);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ pr_debug("waking sk_sleep(sk) 0x%p\n", sk_sleep(sk));
+ sk->sk_state_change(sk);
+as_indicate_complete:
+ release_sock(sk);
+ return 0;
+ case as_close:
+ set_bit(ATM_VF_RELEASED, &vcc->flags);
+ vcc_release_async(vcc, msg->reply);
+ goto out;
+ case as_modify:
+ modify_qos(vcc, msg);
+ break;
+ case as_addparty:
+ case as_dropparty:
+ WRITE_ONCE(sk->sk_err_soft, -msg->reply);
+ /* < 0 failure, otherwise ep_ref */
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ break;
+ default:
+ pr_alert("bad message type %d\n", (int)msg->type);
+ return -EINVAL;
+ }
+ sk->sk_state_change(sk);
+out:
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+void sigd_enq2(struct atm_vcc *vcc, enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc, const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc, const struct atm_qos *qos,
+ int reply)
+{
+ struct sk_buff *skb;
+ struct atmsvc_msg *msg;
+ static unsigned int session = 0;
+
+ pr_debug("%d (0x%p)\n", (int)type, vcc);
+ while (!(skb = alloc_skb(sizeof(struct atmsvc_msg), GFP_KERNEL)))
+ schedule();
+ msg = skb_put_zero(skb, sizeof(struct atmsvc_msg));
+ msg->type = type;
+ *(struct atm_vcc **) &msg->vcc = vcc;
+ *(struct atm_vcc **) &msg->listen_vcc = listen_vcc;
+ msg->reply = reply;
+ if (qos)
+ msg->qos = *qos;
+ if (vcc)
+ msg->sap = vcc->sap;
+ if (svc)
+ msg->svc = *svc;
+ if (vcc)
+ msg->local = vcc->local;
+ if (pvc)
+ msg->pvc = *pvc;
+ if (vcc) {
+ if (type == as_connect && test_bit(ATM_VF_SESSION, &vcc->flags))
+ msg->session = ++session;
+ /* every new pmp connect gets the next session number */
+ }
+ sigd_put_skb(skb);
+ if (vcc)
+ set_bit(ATM_VF_REGIS, &vcc->flags);
+}
+
+void sigd_enq(struct atm_vcc *vcc, enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc, const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc)
+{
+ sigd_enq2(vcc, type, listen_vcc, pvc, svc, vcc ? &vcc->qos : NULL, 0);
+ /* other ISP applications may use "reply" */
+}
+
+static void purge_vcc(struct atm_vcc *vcc)
+{
+ if (sk_atm(vcc)->sk_family == PF_ATMSVC &&
+ !test_bit(ATM_VF_META, &vcc->flags)) {
+ set_bit(ATM_VF_RELEASED, &vcc->flags);
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ vcc_release_async(vcc, -EUNATCH);
+ }
+}
+
+static void sigd_close(struct atm_vcc *vcc)
+{
+ struct sock *s;
+ int i;
+
+ pr_debug("\n");
+ sigd = NULL;
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ pr_err("closing with requests pending\n");
+ skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+
+ read_lock(&vcc_sklist_lock);
+ for (i = 0; i < VCC_HTABLE_SIZE; ++i) {
+ struct hlist_head *head = &vcc_hash[i];
+
+ sk_for_each(s, head) {
+ vcc = atm_sk(s);
+
+ purge_vcc(vcc);
+ }
+ }
+ read_unlock(&vcc_sklist_lock);
+}
+
+static const struct atmdev_ops sigd_dev_ops = {
+ .close = sigd_close,
+ .send = sigd_send
+};
+
+static struct atm_dev sigd_dev = {
+ .ops = &sigd_dev_ops,
+ .type = "sig",
+ .number = 999,
+ .lock = __SPIN_LOCK_UNLOCKED(sigd_dev.lock)
+};
+
+int sigd_attach(struct atm_vcc *vcc)
+{
+ if (sigd)
+ return -EADDRINUSE;
+ pr_debug("\n");
+ sigd = vcc;
+ vcc->dev = &sigd_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ set_bit(ATM_VF_META, &vcc->flags);
+ set_bit(ATM_VF_READY, &vcc->flags);
+ return 0;
+}
diff --git a/net/atm/signaling.h b/net/atm/signaling.h
new file mode 100644
index 000000000..2df8220f7
--- /dev/null
+++ b/net/atm/signaling.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* net/atm/signaling.h - ATM signaling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_SIGNALING_H
+#define NET_ATM_SIGNALING_H
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmsvc.h>
+
+
+extern struct atm_vcc *sigd; /* needed in svc_release */
+
+
+/*
+ * sigd_enq is a wrapper for sigd_enq2, covering the more common cases, and
+ * avoiding huge lists of null values.
+ */
+
+void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply);
+void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc);
+int sigd_attach(struct atm_vcc *vcc);
+
+#endif
diff --git a/net/atm/svc.c b/net/atm/svc.c
new file mode 100644
index 000000000..36a814f1f
--- /dev/null
+++ b/net/atm/svc.c
@@ -0,0 +1,696 @@
+// SPDX-License-Identifier: GPL-2.0
+/* net/atm/svc.c - ATM SVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/string.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched/signal.h>
+#include <linux/fcntl.h> /* O_NONBLOCK */
+#include <linux/init.h>
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+#include <net/sock.h> /* for sock_no_* */
+#include <linux/uaccess.h>
+#include <linux/export.h>
+
+#include "resources.h"
+#include "common.h" /* common for PVCs and SVCs */
+#include "signaling.h"
+#include "addr.h"
+
+#ifdef CONFIG_COMPAT
+/* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */
+#define COMPAT_ATM_ADDPARTY _IOW('a', ATMIOC_SPECIAL + 4, struct compat_atm_iobuf)
+#endif
+
+static int svc_create(struct net *net, struct socket *sock, int protocol,
+ int kern);
+
+/*
+ * Note: since all this is still nicely synchronized with the signaling demon,
+ * there's no need to protect sleep loops with clis. If signaling is
+ * moved into the kernel, that would change.
+ */
+
+
+static int svc_shutdown(struct socket *sock, int how)
+{
+ return 0;
+}
+
+static void svc_disconnect(struct atm_vcc *vcc)
+{
+ DEFINE_WAIT(wait);
+ struct sk_buff *skb;
+ struct sock *sk = sk_atm(vcc);
+
+ pr_debug("%p\n", vcc);
+ if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
+ sigd_enq(vcc, as_close, NULL, NULL, NULL);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
+ break;
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ }
+ /* beware - socket is still in use by atmsigd until the last
+ as_indicate has been answered */
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ pr_debug("LISTEN REL\n");
+ sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
+ dev_kfree_skb(skb);
+ }
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ /* ... may retry later */
+}
+
+static int svc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+
+ if (sk) {
+ vcc = ATM_SD(sock);
+ pr_debug("%p\n", vcc);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ /*
+ * VCC pointer is used as a reference,
+ * so we must not free it (thereby subjecting it to re-use)
+ * before all pending connections are closed
+ */
+ svc_disconnect(vcc);
+ vcc_release(sock);
+ }
+ return 0;
+}
+
+static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc;
+ int error;
+
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
+ return -EINVAL;
+ lock_sock(sk);
+ if (sock->state == SS_CONNECTED) {
+ error = -EISCONN;
+ goto out;
+ }
+ if (sock->state != SS_UNCONNECTED) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc = ATM_SD(sock);
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ clear_bit(ATM_VF_BOUND, &vcc->flags);
+ /* failing rebind will kill old binding */
+ /* @@@ check memory (de)allocation on rebind */
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ vcc->local = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+ break;
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk->sk_err)
+ set_bit(ATM_VF_BOUND, &vcc->flags);
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_connect(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ pr_debug("%p\n", vcc);
+ lock_sock(sk);
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
+ error = -EINVAL;
+ goto out;
+ }
+
+ switch (sock->state) {
+ default:
+ error = -EINVAL;
+ goto out;
+ case SS_CONNECTED:
+ error = -EISCONN;
+ goto out;
+ case SS_CONNECTING:
+ if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
+ error = -EALREADY;
+ goto out;
+ }
+ sock->state = SS_UNCONNECTED;
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ break;
+ case SS_UNCONNECTED:
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (!vcc->qos.txtp.traffic_class &&
+ !vcc->qos.rxtp.traffic_class) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc->remote = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
+ if (flags & O_NONBLOCK) {
+ sock->state = SS_CONNECTING;
+ error = -EINPROGRESS;
+ goto out;
+ }
+ error = 0;
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ if (!signal_pending(current)) {
+ prepare_to_wait(sk_sleep(sk), &wait,
+ TASK_INTERRUPTIBLE);
+ continue;
+ }
+ pr_debug("*ABORT*\n");
+ /*
+ * This is tricky:
+ * Kernel ---close--> Demon
+ * Kernel <--close--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--error--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--okay---- Demon
+ * Kernel <--close--- Demon
+ */
+ sigd_enq(vcc, as_close, NULL, NULL, NULL);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ prepare_to_wait(sk_sleep(sk), &wait,
+ TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ if (!sk->sk_err)
+ while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
+ sigd) {
+ prepare_to_wait(sk_sleep(sk), &wait,
+ TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ clear_bit(ATM_VF_RELEASED, &vcc->flags);
+ clear_bit(ATM_VF_CLOSE, &vcc->flags);
+ /* we're gone now but may connect later */
+ error = -EINTR;
+ break;
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (error)
+ goto out;
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ }
+
+ vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
+ vcc->qos.txtp.pcr = 0;
+ vcc->qos.txtp.min_pcr = 0;
+
+ error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
+ if (!error)
+ sock->state = SS_CONNECTED;
+ else
+ (void)svc_disconnect(vcc);
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_listen(struct socket *sock, int backlog)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ pr_debug("%p\n", vcc);
+ lock_sock(sk);
+ /* let server handle listen on unbound sockets */
+ if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
+ error = -EADDRINUSE;
+ goto out;
+ }
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+ break;
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ set_bit(ATM_VF_LISTEN, &vcc->flags);
+ vcc_insert_socket(sk);
+ sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_accept(struct socket *sock, struct socket *newsock, int flags,
+ bool kern)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ struct atmsvc_msg *msg;
+ struct atm_vcc *old_vcc = ATM_SD(sock);
+ struct atm_vcc *new_vcc;
+ int error;
+
+ lock_sock(sk);
+
+ error = svc_create(sock_net(sk), newsock, 0, kern);
+ if (error)
+ goto out;
+
+ new_vcc = ATM_SD(newsock);
+
+ pr_debug("%p -> %p\n", old_vcc, new_vcc);
+ while (1) {
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
+ sigd) {
+ if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
+ break;
+ if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
+ error = -sk->sk_err;
+ break;
+ }
+ if (flags & O_NONBLOCK) {
+ error = -EAGAIN;
+ break;
+ }
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ prepare_to_wait(sk_sleep(sk), &wait,
+ TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (error)
+ goto out;
+ if (!skb) {
+ error = -EUNATCH;
+ goto out;
+ }
+ msg = (struct atmsvc_msg *)skb->data;
+ new_vcc->qos = msg->qos;
+ set_bit(ATM_VF_HASQOS, &new_vcc->flags);
+ new_vcc->remote = msg->svc;
+ new_vcc->local = msg->local;
+ new_vcc->sap = msg->sap;
+ error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
+ msg->pvc.sap_addr.vpi,
+ msg->pvc.sap_addr.vci);
+ dev_kfree_skb(skb);
+ sk_acceptq_removed(sk);
+ if (error) {
+ sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
+ &old_vcc->qos, error);
+ error = error == -EAGAIN ? -EBUSY : error;
+ goto out;
+ }
+ /* wait should be short, so we ignore the non-blocking flag */
+ set_bit(ATM_VF_WAITING, &new_vcc->flags);
+ sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
+ TASK_UNINTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
+ break;
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ }
+ finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk_atm(new_vcc)->sk_err)
+ break;
+ if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
+ error = -sk_atm(new_vcc)->sk_err;
+ goto out;
+ }
+ }
+ newsock->state = SS_CONNECTED;
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_getname(struct socket *sock, struct sockaddr *sockaddr,
+ int peer)
+{
+ struct sockaddr_atmsvc *addr;
+
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
+ sizeof(struct sockaddr_atmsvc));
+ return sizeof(struct sockaddr_atmsvc);
+}
+
+int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
+{
+ struct sock *sk = sk_atm(vcc);
+ DEFINE_WAIT(wait);
+
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
+ test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
+ break;
+ }
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (!sigd)
+ return -EUNATCH;
+ return -sk->sk_err;
+}
+
+static int svc_setsockopt(struct socket *sock, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int value, error = 0;
+
+ lock_sock(sk);
+ switch (optname) {
+ case SO_ATMSAP:
+ if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_from_sockptr(&vcc->sap, optval, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ set_bit(ATM_VF_HASSAP, &vcc->flags);
+ break;
+ case SO_MULTIPOINT:
+ if (level != SOL_ATM || optlen != sizeof(int)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_from_sockptr(&value, optval, sizeof(int))) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (value == 1)
+ set_bit(ATM_VF_SESSION, &vcc->flags);
+ else if (value == 0)
+ clear_bit(ATM_VF_SESSION, &vcc->flags);
+ else
+ error = -EINVAL;
+ break;
+ default:
+ error = vcc_setsockopt(sock, level, optname, optval, optlen);
+ }
+
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int error = 0, len;
+
+ lock_sock(sk);
+ if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
+ error = vcc_getsockopt(sock, level, optname, optval, optlen);
+ goto out;
+ }
+ if (get_user(len, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (len != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
+ error = -EFAULT;
+ goto out;
+ }
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq(vcc, as_addparty, NULL, NULL,
+ (struct sockaddr_atmsvc *) sockaddr);
+ if (flags & O_NONBLOCK) {
+ error = -EINPROGRESS;
+ goto out;
+ }
+ pr_debug("added wait queue\n");
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+ break;
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ error = -xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_dropparty(struct socket *sock, int ep_ref)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
+ for (;;) {
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
+ if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
+ break;
+ schedule();
+ }
+ finish_wait(sk_sleep(sk), &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ error = -xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ int error, ep_ref;
+ struct sockaddr_atmsvc sa;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ switch (cmd) {
+ case ATM_ADDPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
+ return -EFAULT;
+ error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
+ 0);
+ break;
+ case ATM_DROPPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
+ return -EFAULT;
+ error = svc_dropparty(sock, ep_ref);
+ break;
+ default:
+ error = vcc_ioctl(sock, cmd, arg);
+ }
+
+ return error;
+}
+
+#ifdef CONFIG_COMPAT
+static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ /* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
+ But actually it takes a struct sockaddr_atmsvc, which doesn't need
+ compat handling. So all we have to do is fix up cmd... */
+ if (cmd == COMPAT_ATM_ADDPARTY)
+ cmd = ATM_ADDPARTY;
+
+ if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
+ return svc_ioctl(sock, cmd, arg);
+ else
+ return vcc_compat_ioctl(sock, cmd, arg);
+}
+#endif /* CONFIG_COMPAT */
+
+static const struct proto_ops svc_proto_ops = {
+ .family = PF_ATMSVC,
+ .owner = THIS_MODULE,
+
+ .release = svc_release,
+ .bind = svc_bind,
+ .connect = svc_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = svc_accept,
+ .getname = svc_getname,
+ .poll = vcc_poll,
+ .ioctl = svc_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = svc_compat_ioctl,
+#endif
+ .gettstamp = sock_gettstamp,
+ .listen = svc_listen,
+ .shutdown = svc_shutdown,
+ .setsockopt = svc_setsockopt,
+ .getsockopt = svc_getsockopt,
+ .sendmsg = vcc_sendmsg,
+ .recvmsg = vcc_recvmsg,
+ .mmap = sock_no_mmap,
+};
+
+
+static int svc_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
+{
+ int error;
+
+ if (!net_eq(net, &init_net))
+ return -EAFNOSUPPORT;
+
+ sock->ops = &svc_proto_ops;
+ error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
+ if (error)
+ return error;
+ ATM_SD(sock)->local.sas_family = AF_ATMSVC;
+ ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
+ return 0;
+}
+
+static const struct net_proto_family svc_family_ops = {
+ .family = PF_ATMSVC,
+ .create = svc_create,
+ .owner = THIS_MODULE,
+};
+
+
+/*
+ * Initialize the ATM SVC protocol family
+ */
+
+int __init atmsvc_init(void)
+{
+ return sock_register(&svc_family_ops);
+}
+
+void atmsvc_exit(void)
+{
+ sock_unregister(PF_ATMSVC);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 04:20:38 +0000