diff options
Diffstat (limited to '')
| -rw-r--r-- | net/atm/mpc.c | 1535 |
1 files changed, 1535 insertions, 0 deletions
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"); |