mpc.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:39k
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/init.h>
- #include <linux/bitops.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 <asm/byteorder.h>
- #include <asm/uaccess.h>
- #include <asm/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/config.h>
- #include <linux/module.h>
- #include "lec.h"
- #include "mpc.h"
- #include "resources.h" /* for bind_vcc() */
- /*
- * mpc.c: Implementation of MPOA client kernel part
- */
- #if 0
- #define dprintk printk /* debug */
- #else
- #define dprintk(format,args...)
- #endif
- #if 0
- #define ddprintk printk /* more debug */
- #else
- #define ddprintk(format,args...)
- #endif
- #define MPOA_TAG_LEN 4
- /* 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 uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
- 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(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 int 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( unsigned long checking_time );
- 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
- };
- #ifdef CONFIG_PROC_FS
- extern int mpc_proc_init(void);
- extern void mpc_proc_clean(void);
- #endif
- struct mpoa_client *mpcs = NULL; /* FIXME */
- static struct atm_mpoa_qos *qos_head = NULL;
- static struct timer_list mpc_timer;
- 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(uint32_t 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) {
- printk("mpoa: atm_mpoa_add_qos: out of memoryn");
- 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(uint32_t dst_ip)
- {
- struct atm_mpoa_qos *qos;
- qos = qos_head;
- while( qos != NULL ){
- 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;
- }
- void atm_mpoa_disp_qos(char *page, int *len)
- {
- unsigned char *ip;
- char ipaddr[16];
- struct atm_mpoa_qos *qos;
- qos = qos_head;
- *len += sprintf(page + *len, "QoS entries for shortcuts:n");
- *len += sprintf(page + *len, "IP addressn TX:max_pcr pcr min_pcr max_cdv max_sdun RX:max_pcr pcr min_pcr max_cdv max_sdun");
- ipaddr[sizeof(ipaddr)-1] = ' ';
- while (qos != NULL) {
- ip = (unsigned char *)&qos->ipaddr;
- sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(ip));
- *len += sprintf(page + *len, "%u.%u.%u.%un %-7d %-7d %-7d %-7d %-7dn %-7d %-7d %-7d %-7d %-7dn",
- NIPQUAD(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;
- }
-
- return;
- }
- static struct net_device *find_lec_by_itfnum(int itf)
- {
- extern struct atm_lane_ops atm_lane_ops; /* in common.c */
-
- if (atm_lane_ops.get_lecs == NULL)
- return NULL;
- return atm_lane_ops.get_lecs()[itf]; /* FIXME: something better */
- }
- static struct mpoa_client *alloc_mpc(void)
- {
- struct mpoa_client *mpc;
- mpc = kmalloc(sizeof (struct mpoa_client), GFP_KERNEL);
- if (mpc == NULL)
- return NULL;
- memset(mpc, 0, sizeof(struct mpoa_client));
- mpc->ingress_lock = RW_LOCK_UNLOCKED;
- mpc->egress_lock = RW_LOCK_UNLOCKED;
- 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("mpoa: (%s) start_mpc:n", mpc->dev->name);
- if (dev->hard_start_xmit == NULL) {
- printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not startingn",
- dev->name);
- return;
- }
- mpc->old_hard_start_xmit = dev->hard_start_xmit;
- dev->hard_start_xmit = mpc_send_packet;
- return;
- }
- static void stop_mpc(struct mpoa_client *mpc)
- {
-
- dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name);
- /* Lets not nullify lec device's dev->hard_start_xmit */
- if (mpc->dev->hard_start_xmit != mpc_send_packet) {
- dprintk(" mpc already stopped, not fataln");
- return;
- }
- dprintk("n");
- mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit;
- mpc->old_hard_start_xmit = NULL;
- /* close_shortcuts(mpc); ??? FIXME */
-
- return;
- }
- static const char * __attribute__ ((unused)) mpoa_device_type_string(char type)
- {
- switch(type) {
- case NON_MPOA:
- return "non-MPOA device";
- break;
- case MPS:
- return "MPS";
- break;
- case MPC:
- return "MPC";
- break;
- case MPS_AND_MPC:
- return "both MPS and MPC";
- break;
- default:
- return "unspecified (non-MPOA) device";
- break;
- }
- return ""; /* not reached */
- }
- /*
- * lec device calls this via its dev->priv->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, uint8_t *mac_addr,
- uint8_t *tlvs, uint32_t sizeoftlvs)
- {
- uint32_t type;
- uint8_t length, mpoa_device_type, number_of_mps_macs;
- uint8_t *end_of_tlvs;
- struct mpoa_client *mpc;
-
- mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
- dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name);
- dprintk("total length of all TLVs %dn", sizeoftlvs);
- mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
- if (mpc == NULL) {
- printk("mpoa: (%s) lane2_assoc_ind: no mpcn", 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 %02xn", type, length);
- if (tlvs + length > end_of_tlvs) {
- printk("TLV value extends past its buffer, aborting parsen");
- return;
- }
-
- if (type == 0) {
- printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returningn", 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("mpoa: (%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)) { /* :) */
- printk("nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLVn",
- dev->name);
- continue;
- }
- if ((mpoa_device_type == MPS || mpoa_device_type == MPC)
- && length < 22 + number_of_mps_macs*ETH_ALEN) {
- printk("nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLVn",
- dev->name);
- continue;
- }
- if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) {
- dprintk("ignoring non-MPS devicen");
- 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) {
- printk("nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACsn", dev->name);
- continue; /* someone should read the spec */
- }
- dprintk("this MPS has %d MAC addressesn", 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)
- printk("mpoa: (%s) lane2_assoc_ind: ignoring %d bytes of trailing TLV carbagen",
- dev->name, end_of_tlvs - tlvs);
- return;
- }
- /*
- * 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 uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
- 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(num_macs*ETH_ALEN, GFP_KERNEL);
- if (mpc->mps_macs == NULL) {
- printk("mpoa: (%s) copy_macs: out of memn", mpc->dev->name);
- return NULL;
- }
- }
- memcpy(mpc->mps_macs, router_mac, ETH_ALEN);
- 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;
- uint32_t ipaddr = 0;
- static struct {
- struct llc_snap_hdr hdr;
- uint32_t 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("mpoa: (%s) send_via_shortcut: ipaddr 0x%xn", 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;
- }
- if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */
- ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPENn", mpc->dev->name);
- mpc->in_ops->put(entry);
- return 1;
- }
- ddprintk("mpoa: (%s) send_via_shortcut: using shortcutn", mpc->dev->name);
- /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */
- if (iph->ttl <= 1) {
- ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANEn", 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("mpoa: (%s) send_via_shortcut: adding tag 0x%xn", 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 */
- memcpy(skb->data, &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 */
- memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr));
- }
- atomic_add(skb->truesize, &entry->shortcut->tx_inuse);
- ATM_SKB(skb)->iovcnt = 0; /* just to be safe ... */
- ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
- 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 int mpc_send_packet(struct sk_buff *skb, struct net_device *dev)
- {
- int retval;
- struct mpoa_client *mpc;
- struct ethhdr *eth;
- int i = 0;
-
- mpc = find_mpc_by_lec(dev); /* this should NEVER fail */
- if(mpc == NULL) {
- printk("mpoa: (%s) mpc_send_packet: no MPC foundn", 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 :-) */
- while (i < mpc->number_of_mps_macs) {
- if (memcmp(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN), ETH_ALEN) == 0)
- if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */
- return 0; /* success! */
- i++;
- }
- non_ip:
- retval = mpc->old_hard_start_xmit(skb,dev);
-
- return retval;
- }
- int atm_mpoa_vcc_attach(struct atm_vcc *vcc, long arg)
- {
- int bytes_left;
- struct mpoa_client *mpc;
- struct atmmpc_ioc ioc_data;
- in_cache_entry *in_entry;
- uint32_t ipaddr;
- unsigned char *ip;
- bytes_left = copy_from_user(&ioc_data, (void *)arg, sizeof(struct atmmpc_ioc));
- if (bytes_left != 0) {
- printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userlandn", 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) {
- printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cachen",
- mpc->dev->name);
- if (in_entry != NULL) mpc->in_ops->put(in_entry);
- return -EINVAL;
- }
- ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip;
- printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%un",
- mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
- in_entry->shortcut = vcc;
- mpc->in_ops->put(in_entry);
- } else {
- printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVCn", 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) {
- printk("mpoa: (%s) mpc_vcc_close: close for unknown MPCn", dev->name);
- return;
- }
- dprintk("mpoa: (%s) mpc_vcc_close:n", dev->name);
- in_entry = mpc->in_ops->get_by_vcc(vcc, mpc);
- if (in_entry) {
- unsigned char *ip __attribute__ ((unused)) =
- (unsigned char *)&in_entry->ctrl_info.in_dst_ip;
- dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%un",
- mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
- in_entry->shortcut = NULL;
- mpc->in_ops->put(in_entry);
- }
- eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc);
- if (eg_entry) {
- dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closedn", mpc->dev->name);
- eg_entry->shortcut = NULL;
- mpc->eg_ops->put(eg_entry);
- }
- if (in_entry == NULL && eg_entry == NULL)
- dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closedn", dev->name);
- return;
- }
- 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;
- uint32_t tag;
- char *tmp;
-
- ddprintk("mpoa: (%s) mpc_push:n", dev->name);
- if (skb == NULL) {
- dprintk("mpoa: (%s) mpc_push: null skb, closing VCCn", 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) {
- dprintk("mpoa: (%s) mpc_push: control packet arrivedn", dev->name);
- skb_queue_tail(&vcc->recvq, skb); /* Pass control packets to daemon */
- wake_up(&vcc->sleep);
- return;
- }
- /* data coming over the shortcut */
- atm_return(vcc, skb->truesize);
- mpc = find_mpc_by_lec(dev);
- if (mpc == NULL) {
- printk("mpoa: (%s) mpc_push: unknown MPCn", dev->name);
- return;
- }
- if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */
- ddprintk("mpoa: (%s) mpc_push: tagged data packet arrivedn", dev->name);
- } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */
- printk("mpoa: (%s) mpc_push: non-tagged data packet arrivedn", dev->name);
- printk(" mpc_push: non-tagged data unsupported, purgingn");
- dev_kfree_skb_any(skb);
- return;
- } else {
- printk("mpoa: (%s) mpc_push: garbage arrived, purgingn", dev->name);
- dev_kfree_skb_any(skb);
- return;
- }
- tmp = skb->data + sizeof(struct llc_snap_hdr);
- tag = *(uint32_t *)tmp;
- eg = mpc->eg_ops->get_by_tag(tag, mpc);
- if (eg == NULL) {
- printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %un",
- 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;
- printk("mpoa: (%s) mpc_push: egress SVC in usen", 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 */
- memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length);
- new_skb->protocol = eth_type_trans(new_skb, dev);
- new_skb->nh.raw = new_skb->data;
- eg->latest_ip_addr = new_skb->nh.iph->saddr;
- eg->packets_rcvd++;
- mpc->eg_ops->put(eg);
- netif_rx(new_skb);
- return;
- }
- static struct atmdev_ops mpc_ops = { /* only send is required */
- close: mpoad_close,
- send: msg_from_mpoad
- };
- static struct atm_dev mpc_dev = {
- &mpc_ops, /* device operations */
- NULL, /* PHY operations */
- "mpc", /* device type name */
- 42, /* device index (dummy) */
- NULL, /* VCC table */
- NULL, /* last VCC */
- NULL, /* per-device data */
- NULL, /* private PHY data */
- { 0 }, /* device flags */
- NULL, /* local ATM address */
- { 0 } /* no ESI */
- /* rest of the members will be 0 */
- };
- int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
- {
- struct mpoa_client *mpc;
- struct lec_priv *priv;
-
- if (mpcs == NULL) {
- init_timer(&mpc_timer);
- mpc_timer_refresh();
- /* This lets us now how our LECs are doing */
- register_netdevice_notifier(&mpoa_notifier);
- }
-
- mpc = find_mpc_by_itfnum(arg);
- if (mpc == NULL) {
- dprintk("mpoa: mpoad_attach: allocating new mpc for itf %dn", 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) {
- printk("mpoa: mpoad_attach: mpoad is already present for itf %dn", arg);
- return -EADDRINUSE;
- }
- if (mpc->dev) { /* check if the lec is LANE2 capable */
- priv = (struct lec_priv *)mpc->dev->priv;
- if (priv->lane_version < 2)
- mpc->dev = NULL;
- else
- priv->lane2_ops->associate_indicator = lane2_assoc_ind;
- }
- mpc->mpoad_vcc = vcc;
- bind_vcc(vcc, &mpc_dev);
- 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);
- }
- MOD_INC_USE_COUNT;
- return arg;
- }
- static void send_set_mps_ctrl_addr(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);
- return;
- }
- 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) {
- printk("mpoa: mpoad_close: did not find MPCn");
- return;
- }
- if (!mpc->mpoad_vcc) {
- printk("mpoa: mpoad_close: close for non-present mpoadn");
- return;
- }
-
- mpc->mpoad_vcc = NULL;
- if (mpc->dev) {
- struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv;
- priv->lane2_ops->associate_indicator = NULL;
- stop_mpc(mpc);
- }
- mpc->in_ops->destroy_cache(mpc);
- mpc->eg_ops->destroy_cache(mpc);
- while ( (skb = skb_dequeue(&vcc->recvq)) ){
- atm_return(vcc, skb->truesize);
- kfree_skb(skb);
- }
-
- printk("mpoa: (%s) going downn",
- (mpc->dev) ? mpc->dev->name : "<unknown>");
- MOD_DEC_USE_COUNT;
- return;
- }
- /*
- *
- */
- 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;
- atomic_sub(skb->truesize+ATM_PDU_OVHD, &vcc->tx_inuse);
-
- if (mpc == NULL) {
- printk("mpoa: msg_from_mpoad: no mpc foundn");
- return 0;
- }
- dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>");
- switch(mesg->type) {
- case MPOA_RES_REPLY_RCVD:
- dprintk(" mpoa_res_reply_rcvdn");
- MPOA_res_reply_rcvd(mesg, mpc);
- break;
- case MPOA_TRIGGER_RCVD:
- dprintk(" mpoa_trigger_rcvdn");
- MPOA_trigger_rcvd(mesg, mpc);
- break;
- case INGRESS_PURGE_RCVD:
- dprintk(" nhrp_purge_rcvdn");
- ingress_purge_rcvd(mesg, mpc);
- break;
- case EGRESS_PURGE_RCVD:
- dprintk(" egress_purge_reply_rcvdn");
- egress_purge_rcvd(mesg, mpc);
- break;
- case MPS_DEATH:
- dprintk(" mps_deathn");
- mps_death(mesg, mpc);
- break;
- case CACHE_IMPOS_RCVD:
- dprintk(" cache_impos_rcvdn");
- MPOA_cache_impos_rcvd(mesg, mpc);
- break;
- case SET_MPC_CTRL_ADDR:
- dprintk(" set_mpc_ctrl_addrn");
- set_mpc_ctrl_addr_rcvd(mesg, mpc);
- break;
- case SET_MPS_MAC_ADDR:
- dprintk(" set_mps_mac_addrn");
- set_mps_mac_addr_rcvd(mesg, mpc);
- break;
- case CLEAN_UP_AND_EXIT:
- dprintk(" clean_up_and_exitn");
- clean_up(mesg, mpc, DIE);
- break;
- case RELOAD:
- dprintk(" reloadn");
- clean_up(mesg, mpc, RELOAD);
- break;
- case SET_MPC_PARAMS:
- dprintk(" set_mpc_paramsn");
- mpc->parameters = mesg->content.params;
- break;
- default:
- dprintk(" unknown message %dn", 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;
- if (mpc == NULL || !mpc->mpoad_vcc) {
- printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoadn", 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));
- memcpy(skb->data, mesg, sizeof(struct k_message));
- atm_force_charge(mpc->mpoad_vcc, skb->truesize);
- skb_queue_tail(&mpc->mpoad_vcc->recvq, skb);
- wake_up(&mpc->mpoad_vcc->sleep);
- return 0;
- }
- static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr)
- {
- struct net_device *dev;
- struct mpoa_client *mpc;
- struct lec_priv *priv;
- dev = (struct net_device *)dev_ptr;
- if (dev->name == NULL || 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 = (struct lec_priv *)dev->priv;
- 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("mpoa: mpoa_event_listener: allocating new mpc for %sn",
- dev->name);
- mpc = alloc_mpc();
- if (mpc == NULL) {
- printk("mpoa: mpoa_event_listener: no new mpc");
- break;
- }
- }
- mpc->dev_num = priv->itfnum;
- mpc->dev = dev;
- dprintk("mpoa: (%s) was initializedn", dev->name);
- break;
- case NETDEV_UNREGISTER:
- /* the lec device was deallocated */
- mpc = find_mpc_by_lec(dev);
- if (mpc == NULL)
- break;
- dprintk("mpoa: device (%s) was deallocatedn", dev->name);
- stop_mpc(mpc);
- 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)
- {
- uint32_t 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);
- do_gettimeofday(&(entry->reply_wait));
- 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);
- do_gettimeofday(&(entry->reply_wait));
- mpc->in_ops->put(entry);
- return;
- }
-
- printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving staten",
- (mpc->dev) ? mpc->dev->name : "<unknown>");
- mpc->in_ops->put(entry);
- return;
- }
- /*
- * 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)
- {
- uint32_t dst_ip = msg->content.in_info.in_dst_ip;
- unsigned char *ip __attribute__ ((unused)) = (unsigned char *)&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("mpoa: (%s) using egress SVC to reach %u.%u.%u.%un",client->dev->name, NIPQUAD(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;
- printk("mpoa: (%s) trying to get a CBR shortcutn",client->dev->name);
- }
- else memset(&msg->qos,0,sizeof(struct atm_qos));
- msg_to_mpoad(msg, client);
- return;
- }
- static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc)
- {
- unsigned char *ip;
- uint32_t dst_ip = msg->content.in_info.in_dst_ip;
- in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc);
- ip = (unsigned char *)&dst_ip;
- dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%un", mpc->dev->name, NIPQUAD(ip));
- ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry);
- if(entry == NULL){
- printk("nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.n", mpc->dev->name);
- return;
- }
- ddprintk(" entry_state = %d ", entry->entry_state);
- if (entry->entry_state == INGRESS_RESOLVED) {
- printk("nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!n", mpc->dev->name);
- mpc->in_ops->put(entry);
- return;
- }
- entry->ctrl_info = msg->content.in_info;
- do_gettimeofday(&(entry->tv));
- do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */
- entry->refresh_time = 0;
- ddprintk("entry->shortcut = %pn", 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) {
- printk("mpoa: (%s) MPOA_res_reply_rcvd: 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)
- {
- uint32_t dst_ip = msg->content.in_info.in_dst_ip;
- uint32_t mask = msg->ip_mask;
- unsigned char *ip = (unsigned char *)&dst_ip;
- in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
- if(entry == NULL){
- printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name);
- printk("ip = %u.%u.%u.%un", ip[0], ip[1], ip[2], ip[3]);
- return;
- }
- do {
- dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%un" ,
- mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
- 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);
- return;
- }
- static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
- {
- uint32_t 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("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entryn", 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);
- return;
- }
- static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry)
- {
- struct k_message *purge_msg;
- struct sk_buff *skb;
- dprintk("mpoa: purge_egress_shortcut: enteringn");
- if (vcc == NULL) {
- printk("mpoa: purge_egress_shortcut: vcc == NULLn");
- return;
- }
- skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
- if (skb == NULL) {
- printk("mpoa: purge_egress_shortcut: out of memoryn");
- 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);
- skb_queue_tail(&vcc->recvq, skb);
- wake_up(&vcc->sleep);
- dprintk("mpoa: purge_egress_shortcut: exiting:n");
- return;
- }
- /*
- * 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("mpoa: (%s) mps_death:n", mpc->dev->name);
- if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){
- printk("mpoa: (%s) mps_death: wrong MPSn", 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);
- return;
- }
- 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("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %un",
- 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);
-
- return;
- }
- 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("mpoa: (%s) setting MPC ctrl ATM address to ",
- (mpc->dev) ? mpc->dev->name : "<unknown>");
- for (i = 7; i < sizeof(tlv); i++)
- dprintk("%02x ", tlv[i]);
- dprintk("n");
- if (mpc->dev) {
- priv = (struct lec_priv *)mpc->dev->priv;
- retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv));
- if (retval == 0)
- printk("mpoa: (%s) MPOA device type TLV association failedn", mpc->dev->name);
- retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL);
- if (retval < 0)
- printk("mpoa: (%s) targetless LE_ARP request failedn", mpc->dev->name);
- }
- return;
- }
- 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 = kmalloc(ETH_ALEN,GFP_KERNEL);
- if (client->mps_macs == NULL) {
- printk("mpoa: set_mps_mac_addr_rcvd: out of memoryn");
- return;
- }
- client->number_of_mps_macs = 1;
- memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN);
-
- return;
- }
- /*
- * 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("mpoa: cache_id %un", 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);
- return;
- }
- static void mpc_timer_refresh()
- {
- mpc_timer.expires = jiffies + (MPC_P2 * HZ);
- mpc_timer.data = mpc_timer.expires;
- mpc_timer.function = mpc_cache_check;
- add_timer(&mpc_timer);
-
- return;
- }
- static void mpc_cache_check( unsigned long checking_time )
- {
- struct mpoa_client *mpc = mpcs;
- static unsigned long previous_resolving_check_time = 0;
- static unsigned long previous_refresh_time = 0;
-
- 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();
-
- return;
- }
- void atm_mpoa_init_ops(struct atm_mpoa_ops *ops)
- {
- ops->mpoad_attach = atm_mpoa_mpoad_attach;
- ops->vcc_attach = atm_mpoa_vcc_attach;
- #ifdef CONFIG_PROC_FS
- if(mpc_proc_init() != 0)
- printk(KERN_INFO "mpoa: failed to initialize /proc/mpoan");
- else
- printk(KERN_INFO "mpoa: /proc/mpoa initializedn");
- #endif
- printk("mpc.c: " __DATE__ " " __TIME__ " initializedn");
- return;
- }
- #ifdef MODULE
- int init_module(void)
- {
- extern struct atm_mpoa_ops atm_mpoa_ops;
- atm_mpoa_init_ops(&atm_mpoa_ops);
- return 0;
- }
- void cleanup_module(void)
- {
- extern struct atm_mpoa_ops atm_mpoa_ops;
- struct mpoa_client *mpc, *tmp;
- struct atm_mpoa_qos *qos, *nextqos;
- struct lec_priv *priv;
- if (MOD_IN_USE) {
- printk("mpc.c: module in usen");
- return;
- }
- #ifdef CONFIG_PROC_FS
- mpc_proc_clean();
- #endif
- del_timer(&mpc_timer);
- unregister_netdevice_notifier(&mpoa_notifier);
- atm_mpoa_ops.mpoad_attach = NULL;
- atm_mpoa_ops.vcc_attach = NULL;
- mpc = mpcs;
- mpcs = NULL;
- while (mpc != NULL) {
- tmp = mpc->next;
- if (mpc->dev != NULL) {
- stop_mpc(mpc);
- priv = (struct lec_priv *)mpc->dev->priv;
- if (priv->lane2_ops != NULL)
- priv->lane2_ops->associate_indicator = NULL;
- }
- ddprintk("mpoa: cleanup_module: about to clear cachesn");
- mpc->in_ops->destroy_cache(mpc);
- mpc->eg_ops->destroy_cache(mpc);
- ddprintk("mpoa: cleanup_module: caches clearedn");
- kfree(mpc->mps_macs);
- memset(mpc, 0, sizeof(struct mpoa_client));
- ddprintk("mpoa: cleanup_module: about to kfree %pn", mpc);
- kfree(mpc);
- ddprintk("mpoa: cleanup_module: next mpc is at %pn", tmp);
- mpc = tmp;
- }
- qos = qos_head;
- qos_head = NULL;
- while (qos != NULL) {
- nextqos = qos->next;
- dprintk("mpoa: cleanup_module: freeing qos entry %pn", qos);
- kfree(qos);
- qos = nextqos;
- }
- return;
- }
- #endif /* MODULE */
- MODULE_LICENSE("GPL");