summaryrefslogtreecommitdiffstats
path: root/net/atm/ioctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/atm/ioctl.c')
-rw-r--r--net/atm/ioctl.c365
1 files changed, 365 insertions, 0 deletions
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
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-09 08:38:35 +0000