| #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(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 |
| }; |
| |
| struct mpoa_client *mpcs = NULL; /* FIXME */ |
| static struct atm_mpoa_qos *qos_head = NULL; |
| static DEFINE_TIMER(mpc_timer, NULL, 0, 0); |
| |
| |
| 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(num_macs * ETH_ALEN, 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)); |
| } |
| |
| refcount_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); |
| 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 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 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) { |
| init_timer(&mpc_timer); |
| 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); |
| 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; |
| } |
| |
| 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; |
| do_gettimeofday(&(entry->tv)); |
| do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ |
| 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 void mpc_timer_refresh(void) |
| { |
| mpc_timer.expires = jiffies + (MPC_P2 * HZ); |
| mpc_timer.data = mpc_timer.expires; |
| mpc_timer.function = mpc_cache_check; |
| add_timer(&mpc_timer); |
| } |
| |
| static void mpc_cache_check(unsigned long checking_time) |
| { |
| 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"); |