Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/string.h> |
| 3 | #include <linux/timer.h> |
| 4 | #include <linux/init.h> |
| 5 | #include <linux/bitops.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 6 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/seq_file.h> |
| 8 | |
| 9 | /* We are an ethernet device */ |
| 10 | #include <linux/if_ether.h> |
| 11 | #include <linux/netdevice.h> |
| 12 | #include <linux/etherdevice.h> |
| 13 | #include <net/sock.h> |
| 14 | #include <linux/skbuff.h> |
| 15 | #include <linux/ip.h> |
| 16 | #include <asm/byteorder.h> |
| 17 | #include <asm/uaccess.h> |
| 18 | #include <net/checksum.h> /* for ip_fast_csum() */ |
| 19 | #include <net/arp.h> |
| 20 | #include <net/dst.h> |
| 21 | #include <linux/proc_fs.h> |
| 22 | |
| 23 | /* And atm device */ |
| 24 | #include <linux/atmdev.h> |
| 25 | #include <linux/atmlec.h> |
| 26 | #include <linux/atmmpc.h> |
| 27 | /* Modular too */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | |
| 30 | #include "lec.h" |
| 31 | #include "mpc.h" |
| 32 | #include "resources.h" |
| 33 | |
| 34 | /* |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 35 | * mpc.c: Implementation of MPOA client kernel part |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
| 37 | |
| 38 | #if 0 |
| 39 | #define dprintk printk /* debug */ |
| 40 | #else |
| 41 | #define dprintk(format,args...) |
| 42 | #endif |
| 43 | |
| 44 | #if 0 |
| 45 | #define ddprintk printk /* more debug */ |
| 46 | #else |
| 47 | #define ddprintk(format,args...) |
| 48 | #endif |
| 49 | |
| 50 | |
| 51 | |
| 52 | #define MPOA_TAG_LEN 4 |
| 53 | |
| 54 | /* mpc_daemon -> kernel */ |
| 55 | static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); |
| 56 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
| 57 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
| 58 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
| 59 | static void mps_death(struct k_message *msg, struct mpoa_client *mpc); |
| 60 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); |
| 61 | static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
| 62 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); |
| 63 | static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); |
| 64 | |
| 65 | static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, |
| 66 | uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type); |
| 67 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); |
| 68 | |
| 69 | static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc); |
| 70 | static void mpoad_close(struct atm_vcc *vcc); |
| 71 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); |
| 72 | |
| 73 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); |
| 74 | static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); |
| 75 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); |
| 76 | static void mpc_timer_refresh(void); |
| 77 | static void mpc_cache_check( unsigned long checking_time ); |
| 78 | |
| 79 | static struct llc_snap_hdr llc_snap_mpoa_ctrl = { |
| 80 | 0xaa, 0xaa, 0x03, |
| 81 | {0x00, 0x00, 0x5e}, |
| 82 | {0x00, 0x03} /* For MPOA control PDUs */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 83 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static struct llc_snap_hdr llc_snap_mpoa_data = { |
| 85 | 0xaa, 0xaa, 0x03, |
| 86 | {0x00, 0x00, 0x00}, |
| 87 | {0x08, 0x00} /* This is for IP PDUs only */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 88 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { |
| 90 | 0xaa, 0xaa, 0x03, |
| 91 | {0x00, 0x00, 0x00}, |
| 92 | {0x88, 0x4c} /* This is for tagged data PDUs */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 93 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | static struct notifier_block mpoa_notifier = { |
| 96 | mpoa_event_listener, |
| 97 | NULL, |
| 98 | 0 |
| 99 | }; |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | struct mpoa_client *mpcs = NULL; /* FIXME */ |
| 102 | static struct atm_mpoa_qos *qos_head = NULL; |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 103 | static DEFINE_TIMER(mpc_timer, NULL, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
| 105 | |
| 106 | static struct mpoa_client *find_mpc_by_itfnum(int itf) |
| 107 | { |
| 108 | struct mpoa_client *mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | mpc = mpcs; /* our global linked list */ |
| 111 | while (mpc != NULL) { |
| 112 | if (mpc->dev_num == itf) |
| 113 | return mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 114 | mpc = mpc->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | return NULL; /* not found */ |
| 118 | } |
| 119 | |
| 120 | static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) |
| 121 | { |
| 122 | struct mpoa_client *mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | mpc = mpcs; /* our global linked list */ |
| 125 | while (mpc != NULL) { |
| 126 | if (mpc->mpoad_vcc == vcc) |
| 127 | return mpc; |
| 128 | mpc = mpc->next; |
| 129 | } |
| 130 | |
| 131 | return NULL; /* not found */ |
| 132 | } |
| 133 | |
| 134 | static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) |
| 135 | { |
| 136 | struct mpoa_client *mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | mpc = mpcs; /* our global linked list */ |
| 139 | while (mpc != NULL) { |
| 140 | if (mpc->dev == dev) |
| 141 | return mpc; |
| 142 | mpc = mpc->next; |
| 143 | } |
| 144 | |
| 145 | return NULL; /* not found */ |
| 146 | } |
| 147 | |
| 148 | /* |
| 149 | * Functions for managing QoS list |
| 150 | */ |
| 151 | |
| 152 | /* |
| 153 | * Overwrites the old entry or makes a new one. |
| 154 | */ |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 155 | struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
| 157 | struct atm_mpoa_qos *entry; |
| 158 | |
| 159 | entry = atm_mpoa_search_qos(dst_ip); |
| 160 | if (entry != NULL) { |
| 161 | entry->qos = *qos; |
| 162 | return entry; |
| 163 | } |
| 164 | |
| 165 | entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); |
| 166 | if (entry == NULL) { |
| 167 | printk("mpoa: atm_mpoa_add_qos: out of memory\n"); |
| 168 | return entry; |
| 169 | } |
| 170 | |
| 171 | entry->ipaddr = dst_ip; |
| 172 | entry->qos = *qos; |
| 173 | |
| 174 | entry->next = qos_head; |
| 175 | qos_head = entry; |
| 176 | |
| 177 | return entry; |
| 178 | } |
| 179 | |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 180 | struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
| 182 | struct atm_mpoa_qos *qos; |
| 183 | |
| 184 | qos = qos_head; |
| 185 | while( qos != NULL ){ |
| 186 | if(qos->ipaddr == dst_ip) { |
| 187 | break; |
| 188 | } |
| 189 | qos = qos->next; |
| 190 | } |
| 191 | |
| 192 | return qos; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | /* |
| 196 | * Returns 0 for failure |
| 197 | */ |
| 198 | int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) |
| 199 | { |
| 200 | |
| 201 | struct atm_mpoa_qos *curr; |
| 202 | |
| 203 | if (entry == NULL) return 0; |
| 204 | if (entry == qos_head) { |
| 205 | qos_head = qos_head->next; |
| 206 | kfree(entry); |
| 207 | return 1; |
| 208 | } |
| 209 | |
| 210 | curr = qos_head; |
| 211 | while (curr != NULL) { |
| 212 | if (curr->next == entry) { |
| 213 | curr->next = entry->next; |
| 214 | kfree(entry); |
| 215 | return 1; |
| 216 | } |
| 217 | curr = curr->next; |
| 218 | } |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | /* this is buggered - we need locking for qos_head */ |
| 224 | void atm_mpoa_disp_qos(struct seq_file *m) |
| 225 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | struct atm_mpoa_qos *qos; |
| 227 | |
| 228 | qos = qos_head; |
| 229 | seq_printf(m, "QoS entries for shortcuts:\n"); |
| 230 | 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"); |
| 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | while (qos != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", |
Al Viro | ff7512e | 2006-06-20 03:27:27 -0700 | [diff] [blame] | 234 | NIPQUAD(qos->ipaddr), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, |
| 236 | qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); |
| 237 | qos = qos->next; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | static struct net_device *find_lec_by_itfnum(int itf) |
| 242 | { |
| 243 | struct net_device *dev; |
| 244 | char name[IFNAMSIZ]; |
| 245 | |
| 246 | sprintf(name, "lec%d", itf); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 247 | dev = dev_get_by_name(&init_net, name); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | return dev; |
| 250 | } |
| 251 | |
| 252 | static struct mpoa_client *alloc_mpc(void) |
| 253 | { |
| 254 | struct mpoa_client *mpc; |
| 255 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 256 | mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | if (mpc == NULL) |
| 258 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | rwlock_init(&mpc->ingress_lock); |
| 260 | rwlock_init(&mpc->egress_lock); |
| 261 | mpc->next = mpcs; |
| 262 | atm_mpoa_init_cache(mpc); |
| 263 | |
| 264 | mpc->parameters.mpc_p1 = MPC_P1; |
| 265 | mpc->parameters.mpc_p2 = MPC_P2; |
| 266 | memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); |
| 267 | mpc->parameters.mpc_p4 = MPC_P4; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 268 | mpc->parameters.mpc_p5 = MPC_P5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | mpc->parameters.mpc_p6 = MPC_P6; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | mpcs = mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return mpc; |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * |
| 278 | * start_mpc() puts the MPC on line. All the packets destined |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 279 | * to the lec underneath us are now being monitored and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | * shortcuts will be established. |
| 281 | * |
| 282 | */ |
| 283 | static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) |
| 284 | { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 285 | |
| 286 | dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | if (dev->hard_start_xmit == NULL) { |
| 288 | printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", |
| 289 | dev->name); |
| 290 | return; |
| 291 | } |
| 292 | mpc->old_hard_start_xmit = dev->hard_start_xmit; |
| 293 | dev->hard_start_xmit = mpc_send_packet; |
| 294 | |
| 295 | return; |
| 296 | } |
| 297 | |
| 298 | static void stop_mpc(struct mpoa_client *mpc) |
| 299 | { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 300 | |
| 301 | dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | /* Lets not nullify lec device's dev->hard_start_xmit */ |
| 304 | if (mpc->dev->hard_start_xmit != mpc_send_packet) { |
| 305 | dprintk(" mpc already stopped, not fatal\n"); |
| 306 | return; |
| 307 | } |
| 308 | dprintk("\n"); |
| 309 | mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; |
| 310 | mpc->old_hard_start_xmit = NULL; |
| 311 | /* close_shortcuts(mpc); ??? FIXME */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | return; |
| 314 | } |
| 315 | |
| 316 | static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); |
| 317 | |
| 318 | static const char *mpoa_device_type_string(char type) |
| 319 | { |
| 320 | switch(type) { |
| 321 | case NON_MPOA: |
| 322 | return "non-MPOA device"; |
| 323 | break; |
| 324 | case MPS: |
| 325 | return "MPS"; |
| 326 | break; |
| 327 | case MPC: |
| 328 | return "MPC"; |
| 329 | break; |
| 330 | case MPS_AND_MPC: |
| 331 | return "both MPS and MPC"; |
| 332 | break; |
| 333 | default: |
| 334 | return "unspecified (non-MPOA) device"; |
| 335 | break; |
| 336 | } |
| 337 | |
| 338 | return ""; /* not reached */ |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * lec device calls this via its dev->priv->lane2_ops->associate_indicator() |
| 343 | * when it sees a TLV in LE_ARP packet. |
| 344 | * We fill in the pointer above when we see a LANE2 lec initializing |
| 345 | * See LANE2 spec 3.1.5 |
| 346 | * |
| 347 | * Quite a big and ugly function but when you look at it |
| 348 | * all it does is to try to locate and parse MPOA Device |
| 349 | * Type TLV. |
| 350 | * We give our lec a pointer to this function and when the |
| 351 | * lec sees a TLV it uses the pointer to call this function. |
| 352 | * |
| 353 | */ |
| 354 | static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr, |
| 355 | uint8_t *tlvs, uint32_t sizeoftlvs) |
| 356 | { |
| 357 | uint32_t type; |
| 358 | uint8_t length, mpoa_device_type, number_of_mps_macs; |
| 359 | uint8_t *end_of_tlvs; |
| 360 | struct mpoa_client *mpc; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ |
| 363 | dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); |
| 364 | dprintk("total length of all TLVs %d\n", sizeoftlvs); |
| 365 | mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ |
| 366 | if (mpc == NULL) { |
| 367 | printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); |
| 368 | return; |
| 369 | } |
| 370 | end_of_tlvs = tlvs + sizeoftlvs; |
| 371 | while (end_of_tlvs - tlvs >= 5) { |
| 372 | type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; |
| 373 | length = tlvs[4]; |
| 374 | tlvs += 5; |
| 375 | dprintk(" type 0x%x length %02x\n", type, length); |
| 376 | if (tlvs + length > end_of_tlvs) { |
| 377 | printk("TLV value extends past its buffer, aborting parse\n"); |
| 378 | return; |
| 379 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | if (type == 0) { |
| 382 | printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); |
| 383 | return; |
| 384 | } |
| 385 | |
| 386 | if (type != TLV_MPOA_DEVICE_TYPE) { |
| 387 | tlvs += length; |
| 388 | continue; /* skip other TLVs */ |
| 389 | } |
| 390 | mpoa_device_type = *tlvs++; |
| 391 | number_of_mps_macs = *tlvs++; |
| 392 | dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); |
| 393 | if (mpoa_device_type == MPS_AND_MPC && |
| 394 | length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ |
| 395 | printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", |
| 396 | dev->name); |
| 397 | continue; |
| 398 | } |
| 399 | if ((mpoa_device_type == MPS || mpoa_device_type == MPC) |
| 400 | && length < 22 + number_of_mps_macs*ETH_ALEN) { |
| 401 | printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", |
| 402 | dev->name); |
| 403 | continue; |
| 404 | } |
| 405 | if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { |
| 406 | dprintk("ignoring non-MPS device\n"); |
| 407 | if (mpoa_device_type == MPC) tlvs += 20; |
| 408 | continue; /* we are only interested in MPSs */ |
| 409 | } |
| 410 | if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { |
| 411 | printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); |
| 412 | continue; /* someone should read the spec */ |
| 413 | } |
| 414 | dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | /* ok, now we can go and tell our daemon the control address of MPS */ |
| 417 | send_set_mps_ctrl_addr(tlvs, mpc); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); |
| 420 | if (tlvs == NULL) return; |
| 421 | } |
| 422 | if (end_of_tlvs - tlvs != 0) |
| 423 | printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", |
| 424 | dev->name, end_of_tlvs - tlvs); |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * Store at least advertizing router's MAC address |
| 430 | * plus the possible MAC address(es) to mpc->mps_macs. |
| 431 | * For a freshly allocated MPOA client mpc->mps_macs == 0. |
| 432 | */ |
| 433 | static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac, |
| 434 | uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type) |
| 435 | { |
| 436 | int num_macs; |
| 437 | num_macs = (mps_macs > 1) ? mps_macs : 1; |
| 438 | |
| 439 | if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ |
| 440 | if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); |
| 441 | mpc->number_of_mps_macs = 0; |
| 442 | mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); |
| 443 | if (mpc->mps_macs == NULL) { |
| 444 | printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); |
| 445 | return NULL; |
| 446 | } |
| 447 | } |
| 448 | memcpy(mpc->mps_macs, router_mac, ETH_ALEN); |
| 449 | tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; |
| 450 | if (mps_macs > 0) |
| 451 | memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); |
| 452 | tlvs += mps_macs*ETH_ALEN; |
| 453 | mpc->number_of_mps_macs = num_macs; |
| 454 | |
| 455 | return tlvs; |
| 456 | } |
| 457 | |
| 458 | static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) |
| 459 | { |
| 460 | in_cache_entry *entry; |
| 461 | struct iphdr *iph; |
| 462 | char *buff; |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 463 | __be32 ipaddr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
| 465 | static struct { |
| 466 | struct llc_snap_hdr hdr; |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 467 | __be32 tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } tagged_llc_snap_hdr = { |
| 469 | {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, |
| 470 | 0 |
| 471 | }; |
| 472 | |
| 473 | buff = skb->data + mpc->dev->hard_header_len; |
| 474 | iph = (struct iphdr *)buff; |
| 475 | ipaddr = iph->daddr; |
| 476 | |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 477 | ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | entry = mpc->in_ops->get(ipaddr, mpc); |
| 480 | if (entry == NULL) { |
| 481 | entry = mpc->in_ops->add_entry(ipaddr, mpc); |
| 482 | if (entry != NULL) mpc->in_ops->put(entry); |
| 483 | return 1; |
| 484 | } |
| 485 | if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 486 | ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | mpc->in_ops->put(entry); |
| 488 | return 1; |
| 489 | } |
| 490 | |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 491 | ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ |
| 493 | if (iph->ttl <= 1) { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 494 | ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | mpc->in_ops->put(entry); |
| 496 | return 1; |
| 497 | } |
| 498 | iph->ttl--; |
| 499 | iph->check = 0; |
| 500 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); |
| 501 | |
| 502 | if (entry->ctrl_info.tag != 0) { |
| 503 | ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); |
| 504 | tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; |
| 505 | skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ |
| 506 | skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 507 | skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, |
| 508 | sizeof(tagged_llc_snap_hdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } else { |
| 510 | skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ |
| 511 | skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 512 | skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, |
| 513 | sizeof(struct llc_snap_hdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); |
| 517 | ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; |
| 518 | entry->shortcut->send(entry->shortcut, skb); |
| 519 | entry->packets_fwded++; |
| 520 | mpc->in_ops->put(entry); |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * Probably needs some error checks and locking, not sure... |
| 527 | */ |
| 528 | static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) |
| 529 | { |
| 530 | int retval; |
| 531 | struct mpoa_client *mpc; |
| 532 | struct ethhdr *eth; |
| 533 | int i = 0; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ |
| 536 | if(mpc == NULL) { |
| 537 | printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); |
| 538 | goto non_ip; |
| 539 | } |
| 540 | |
| 541 | eth = (struct ethhdr *)skb->data; |
| 542 | if (eth->h_proto != htons(ETH_P_IP)) |
| 543 | goto non_ip; /* Multi-Protocol Over ATM :-) */ |
| 544 | |
Herbert Xu | 1c9b7aa | 2008-01-09 03:51:59 -0800 | [diff] [blame] | 545 | /* Weed out funny packets (e.g., AF_PACKET or raw). */ |
| 546 | if (skb->len < ETH_HLEN + sizeof(struct iphdr)) |
| 547 | goto non_ip; |
| 548 | skb_set_network_header(skb, ETH_HLEN); |
| 549 | if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5) |
| 550 | goto non_ip; |
| 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | while (i < mpc->number_of_mps_macs) { |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame] | 553 | if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ |
| 555 | return 0; /* success! */ |
| 556 | i++; |
| 557 | } |
| 558 | |
| 559 | non_ip: |
| 560 | retval = mpc->old_hard_start_xmit(skb,dev); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | return retval; |
| 563 | } |
| 564 | |
| 565 | static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
| 566 | { |
| 567 | int bytes_left; |
| 568 | struct mpoa_client *mpc; |
| 569 | struct atmmpc_ioc ioc_data; |
| 570 | in_cache_entry *in_entry; |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 571 | __be32 ipaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
| 573 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); |
| 574 | if (bytes_left != 0) { |
| 575 | printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); |
| 576 | return -EFAULT; |
| 577 | } |
| 578 | ipaddr = ioc_data.ipaddr; |
| 579 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) |
| 580 | return -EINVAL; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | mpc = find_mpc_by_itfnum(ioc_data.dev_num); |
| 583 | if (mpc == NULL) |
| 584 | return -EINVAL; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 585 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | if (ioc_data.type == MPC_SOCKET_INGRESS) { |
| 587 | in_entry = mpc->in_ops->get(ipaddr, mpc); |
| 588 | if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { |
| 589 | printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", |
| 590 | mpc->dev->name); |
| 591 | if (in_entry != NULL) mpc->in_ops->put(in_entry); |
| 592 | return -EINVAL; |
| 593 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", |
Al Viro | b422993 | 2006-09-26 21:23:43 -0700 | [diff] [blame] | 595 | mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | in_entry->shortcut = vcc; |
| 597 | mpc->in_ops->put(in_entry); |
| 598 | } else { |
| 599 | printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); |
| 600 | } |
| 601 | |
| 602 | vcc->proto_data = mpc->dev; |
| 603 | vcc->push = mpc_push; |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | /* |
| 609 | * |
| 610 | */ |
| 611 | static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) |
| 612 | { |
| 613 | struct mpoa_client *mpc; |
| 614 | in_cache_entry *in_entry; |
| 615 | eg_cache_entry *eg_entry; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | mpc = find_mpc_by_lec(dev); |
| 618 | if (mpc == NULL) { |
| 619 | printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); |
| 620 | return; |
| 621 | } |
| 622 | |
| 623 | dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); |
| 624 | in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); |
| 625 | if (in_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", |
Al Viro | b422993 | 2006-09-26 21:23:43 -0700 | [diff] [blame] | 627 | mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | in_entry->shortcut = NULL; |
| 629 | mpc->in_ops->put(in_entry); |
| 630 | } |
| 631 | eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); |
| 632 | if (eg_entry) { |
| 633 | dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); |
| 634 | eg_entry->shortcut = NULL; |
| 635 | mpc->eg_ops->put(eg_entry); |
| 636 | } |
| 637 | |
| 638 | if (in_entry == NULL && eg_entry == NULL) |
| 639 | dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); |
| 640 | |
| 641 | return; |
| 642 | } |
| 643 | |
| 644 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) |
| 645 | { |
| 646 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 647 | struct sk_buff *new_skb; |
| 648 | eg_cache_entry *eg; |
| 649 | struct mpoa_client *mpc; |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 650 | __be32 tag; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | char *tmp; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | ddprintk("mpoa: (%s) mpc_push:\n", dev->name); |
| 654 | if (skb == NULL) { |
| 655 | dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); |
| 656 | mpc_vcc_close(vcc, dev); |
| 657 | return; |
| 658 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | skb->dev = dev; |
| 661 | if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { |
| 662 | struct sock *sk = sk_atm(vcc); |
| 663 | |
| 664 | dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); |
| 665 | /* Pass control packets to daemon */ |
| 666 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 667 | sk->sk_data_ready(sk, skb->len); |
| 668 | return; |
| 669 | } |
| 670 | |
| 671 | /* data coming over the shortcut */ |
| 672 | atm_return(vcc, skb->truesize); |
| 673 | |
| 674 | mpc = find_mpc_by_lec(dev); |
| 675 | if (mpc == NULL) { |
| 676 | printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); |
| 677 | return; |
| 678 | } |
| 679 | |
| 680 | if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ |
| 681 | ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); |
| 682 | |
| 683 | } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ |
| 684 | printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); |
| 685 | printk(" mpc_push: non-tagged data unsupported, purging\n"); |
| 686 | dev_kfree_skb_any(skb); |
| 687 | return; |
| 688 | } else { |
| 689 | printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); |
| 690 | dev_kfree_skb_any(skb); |
| 691 | return; |
| 692 | } |
| 693 | |
| 694 | tmp = skb->data + sizeof(struct llc_snap_hdr); |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 695 | tag = *(__be32 *)tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | eg = mpc->eg_ops->get_by_tag(tag, mpc); |
| 698 | if (eg == NULL) { |
| 699 | printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", |
| 700 | dev->name,tag); |
| 701 | purge_egress_shortcut(vcc, NULL); |
| 702 | dev_kfree_skb_any(skb); |
| 703 | return; |
| 704 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | /* |
| 707 | * See if ingress MPC is using shortcut we opened as a return channel. |
| 708 | * This means we have a bi-directional vcc opened by us. |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 709 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | if (eg->shortcut == NULL) { |
| 711 | eg->shortcut = vcc; |
| 712 | printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); |
| 713 | } |
| 714 | |
| 715 | skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ |
| 716 | new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ |
| 717 | dev_kfree_skb_any(skb); |
| 718 | if (new_skb == NULL){ |
| 719 | mpc->eg_ops->put(eg); |
| 720 | return; |
| 721 | } |
| 722 | skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 723 | skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, |
| 724 | eg->ctrl_info.DH_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | new_skb->protocol = eth_type_trans(new_skb, dev); |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 726 | skb_reset_network_header(new_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 728 | eg->latest_ip_addr = ip_hdr(new_skb)->saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | eg->packets_rcvd++; |
| 730 | mpc->eg_ops->put(eg); |
| 731 | |
| 732 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
| 733 | netif_rx(new_skb); |
| 734 | |
| 735 | return; |
| 736 | } |
| 737 | |
| 738 | static struct atmdev_ops mpc_ops = { /* only send is required */ |
| 739 | .close = mpoad_close, |
| 740 | .send = msg_from_mpoad |
| 741 | }; |
| 742 | |
| 743 | static struct atm_dev mpc_dev = { |
| 744 | .ops = &mpc_ops, |
| 745 | .type = "mpc", |
| 746 | .number = 42, |
Milind Arun Choudhary | 4ef8d0a | 2007-04-26 01:37:44 -0700 | [diff] [blame] | 747 | .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | /* members not explicitly initialised will be 0 */ |
| 749 | }; |
| 750 | |
| 751 | static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) |
| 752 | { |
| 753 | struct mpoa_client *mpc; |
| 754 | struct lec_priv *priv; |
| 755 | int err; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | if (mpcs == NULL) { |
| 758 | init_timer(&mpc_timer); |
| 759 | mpc_timer_refresh(); |
| 760 | |
| 761 | /* This lets us now how our LECs are doing */ |
| 762 | err = register_netdevice_notifier(&mpoa_notifier); |
| 763 | if (err < 0) { |
| 764 | del_timer(&mpc_timer); |
| 765 | return err; |
| 766 | } |
| 767 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | mpc = find_mpc_by_itfnum(arg); |
| 770 | if (mpc == NULL) { |
| 771 | dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); |
| 772 | mpc = alloc_mpc(); |
| 773 | if (mpc == NULL) |
| 774 | return -ENOMEM; |
| 775 | mpc->dev_num = arg; |
| 776 | mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ |
| 777 | } |
| 778 | if (mpc->mpoad_vcc) { |
| 779 | printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); |
| 780 | return -EADDRINUSE; |
| 781 | } |
| 782 | |
| 783 | if (mpc->dev) { /* check if the lec is LANE2 capable */ |
| 784 | priv = (struct lec_priv *)mpc->dev->priv; |
| 785 | if (priv->lane_version < 2) { |
| 786 | dev_put(mpc->dev); |
| 787 | mpc->dev = NULL; |
| 788 | } else |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 789 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | mpc->mpoad_vcc = vcc; |
| 793 | vcc->dev = &mpc_dev; |
| 794 | vcc_insert_socket(sk_atm(vcc)); |
| 795 | set_bit(ATM_VF_META,&vcc->flags); |
| 796 | set_bit(ATM_VF_READY,&vcc->flags); |
| 797 | |
| 798 | if (mpc->dev) { |
| 799 | char empty[ATM_ESA_LEN]; |
| 800 | memset(empty, 0, ATM_ESA_LEN); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 801 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | start_mpc(mpc, mpc->dev); |
| 803 | /* set address if mpcd e.g. gets killed and restarted. |
| 804 | * If we do not do it now we have to wait for the next LE_ARP |
| 805 | */ |
| 806 | if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) |
| 807 | send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); |
| 808 | } |
| 809 | |
| 810 | __module_get(THIS_MODULE); |
| 811 | return arg; |
| 812 | } |
| 813 | |
| 814 | static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc) |
| 815 | { |
| 816 | struct k_message mesg; |
| 817 | |
| 818 | memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | mesg.type = SET_MPS_CTRL_ADDR; |
| 821 | memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); |
| 822 | msg_to_mpoad(&mesg, mpc); |
| 823 | |
| 824 | return; |
| 825 | } |
| 826 | |
| 827 | static void mpoad_close(struct atm_vcc *vcc) |
| 828 | { |
| 829 | struct mpoa_client *mpc; |
| 830 | struct sk_buff *skb; |
| 831 | |
| 832 | mpc = find_mpc_by_vcc(vcc); |
| 833 | if (mpc == NULL) { |
| 834 | printk("mpoa: mpoad_close: did not find MPC\n"); |
| 835 | return; |
| 836 | } |
| 837 | if (!mpc->mpoad_vcc) { |
| 838 | printk("mpoa: mpoad_close: close for non-present mpoad\n"); |
| 839 | return; |
| 840 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | mpc->mpoad_vcc = NULL; |
| 843 | if (mpc->dev) { |
| 844 | struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; |
| 845 | priv->lane2_ops->associate_indicator = NULL; |
| 846 | stop_mpc(mpc); |
| 847 | dev_put(mpc->dev); |
| 848 | } |
| 849 | |
| 850 | mpc->in_ops->destroy_cache(mpc); |
| 851 | mpc->eg_ops->destroy_cache(mpc); |
| 852 | |
| 853 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
| 854 | atm_return(vcc, skb->truesize); |
| 855 | kfree_skb(skb); |
| 856 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | printk("mpoa: (%s) going down\n", |
| 859 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
| 860 | module_put(THIS_MODULE); |
| 861 | |
| 862 | return; |
| 863 | } |
| 864 | |
| 865 | /* |
| 866 | * |
| 867 | */ |
| 868 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) |
| 869 | { |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | struct mpoa_client *mpc = find_mpc_by_vcc(vcc); |
| 872 | struct k_message *mesg = (struct k_message*)skb->data; |
| 873 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | if (mpc == NULL) { |
| 876 | printk("mpoa: msg_from_mpoad: no mpc found\n"); |
| 877 | return 0; |
| 878 | } |
| 879 | dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>"); |
| 880 | switch(mesg->type) { |
| 881 | case MPOA_RES_REPLY_RCVD: |
| 882 | dprintk(" mpoa_res_reply_rcvd\n"); |
| 883 | MPOA_res_reply_rcvd(mesg, mpc); |
| 884 | break; |
| 885 | case MPOA_TRIGGER_RCVD: |
| 886 | dprintk(" mpoa_trigger_rcvd\n"); |
| 887 | MPOA_trigger_rcvd(mesg, mpc); |
| 888 | break; |
| 889 | case INGRESS_PURGE_RCVD: |
| 890 | dprintk(" nhrp_purge_rcvd\n"); |
| 891 | ingress_purge_rcvd(mesg, mpc); |
| 892 | break; |
| 893 | case EGRESS_PURGE_RCVD: |
| 894 | dprintk(" egress_purge_reply_rcvd\n"); |
| 895 | egress_purge_rcvd(mesg, mpc); |
| 896 | break; |
| 897 | case MPS_DEATH: |
| 898 | dprintk(" mps_death\n"); |
| 899 | mps_death(mesg, mpc); |
| 900 | break; |
| 901 | case CACHE_IMPOS_RCVD: |
| 902 | dprintk(" cache_impos_rcvd\n"); |
| 903 | MPOA_cache_impos_rcvd(mesg, mpc); |
| 904 | break; |
| 905 | case SET_MPC_CTRL_ADDR: |
| 906 | dprintk(" set_mpc_ctrl_addr\n"); |
| 907 | set_mpc_ctrl_addr_rcvd(mesg, mpc); |
| 908 | break; |
| 909 | case SET_MPS_MAC_ADDR: |
| 910 | dprintk(" set_mps_mac_addr\n"); |
| 911 | set_mps_mac_addr_rcvd(mesg, mpc); |
| 912 | break; |
| 913 | case CLEAN_UP_AND_EXIT: |
| 914 | dprintk(" clean_up_and_exit\n"); |
| 915 | clean_up(mesg, mpc, DIE); |
| 916 | break; |
| 917 | case RELOAD: |
| 918 | dprintk(" reload\n"); |
| 919 | clean_up(mesg, mpc, RELOAD); |
| 920 | break; |
| 921 | case SET_MPC_PARAMS: |
| 922 | dprintk(" set_mpc_params\n"); |
| 923 | mpc->parameters = mesg->content.params; |
| 924 | break; |
| 925 | default: |
| 926 | dprintk(" unknown message %d\n", mesg->type); |
| 927 | break; |
| 928 | } |
| 929 | kfree_skb(skb); |
| 930 | |
| 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | /* Remember that this function may not do things that sleep */ |
| 935 | int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) |
| 936 | { |
| 937 | struct sk_buff *skb; |
| 938 | struct sock *sk; |
| 939 | |
| 940 | if (mpc == NULL || !mpc->mpoad_vcc) { |
| 941 | printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); |
| 942 | return -ENXIO; |
| 943 | } |
| 944 | |
| 945 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); |
| 946 | if (skb == NULL) |
| 947 | return -ENOMEM; |
| 948 | skb_put(skb, sizeof(struct k_message)); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 949 | skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | atm_force_charge(mpc->mpoad_vcc, skb->truesize); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | sk = sk_atm(mpc->mpoad_vcc); |
| 953 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 954 | sk->sk_data_ready(sk, skb->len); |
| 955 | |
| 956 | return 0; |
| 957 | } |
| 958 | |
| 959 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) |
| 960 | { |
| 961 | struct net_device *dev; |
| 962 | struct mpoa_client *mpc; |
| 963 | struct lec_priv *priv; |
| 964 | |
| 965 | dev = (struct net_device *)dev_ptr; |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 966 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 967 | if (dev_net(dev) != &init_net) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 968 | return NOTIFY_DONE; |
| 969 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | if (dev->name == NULL || strncmp(dev->name, "lec", 3)) |
| 971 | return NOTIFY_DONE; /* we are only interested in lec:s */ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 972 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | switch (event) { |
| 974 | case NETDEV_REGISTER: /* a new lec device was allocated */ |
| 975 | priv = (struct lec_priv *)dev->priv; |
| 976 | if (priv->lane_version < 2) |
| 977 | break; |
| 978 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; |
| 979 | mpc = find_mpc_by_itfnum(priv->itfnum); |
| 980 | if (mpc == NULL) { |
| 981 | dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", |
| 982 | dev->name); |
| 983 | mpc = alloc_mpc(); |
| 984 | if (mpc == NULL) { |
| 985 | printk("mpoa: mpoa_event_listener: no new mpc"); |
| 986 | break; |
| 987 | } |
| 988 | } |
| 989 | mpc->dev_num = priv->itfnum; |
| 990 | mpc->dev = dev; |
| 991 | dev_hold(dev); |
| 992 | dprintk("mpoa: (%s) was initialized\n", dev->name); |
| 993 | break; |
| 994 | case NETDEV_UNREGISTER: |
| 995 | /* the lec device was deallocated */ |
| 996 | mpc = find_mpc_by_lec(dev); |
| 997 | if (mpc == NULL) |
| 998 | break; |
| 999 | dprintk("mpoa: device (%s) was deallocated\n", dev->name); |
| 1000 | stop_mpc(mpc); |
| 1001 | dev_put(mpc->dev); |
| 1002 | mpc->dev = NULL; |
| 1003 | break; |
| 1004 | case NETDEV_UP: |
| 1005 | /* the dev was ifconfig'ed up */ |
| 1006 | mpc = find_mpc_by_lec(dev); |
| 1007 | if (mpc == NULL) |
| 1008 | break; |
| 1009 | if (mpc->mpoad_vcc != NULL) { |
| 1010 | start_mpc(mpc, dev); |
| 1011 | } |
| 1012 | break; |
| 1013 | case NETDEV_DOWN: |
| 1014 | /* the dev was ifconfig'ed down */ |
| 1015 | /* this means that the flow of packets from the |
| 1016 | * upper layer stops |
| 1017 | */ |
| 1018 | mpc = find_mpc_by_lec(dev); |
| 1019 | if (mpc == NULL) |
| 1020 | break; |
| 1021 | if (mpc->mpoad_vcc != NULL) { |
| 1022 | stop_mpc(mpc); |
| 1023 | } |
| 1024 | break; |
| 1025 | case NETDEV_REBOOT: |
| 1026 | case NETDEV_CHANGE: |
| 1027 | case NETDEV_CHANGEMTU: |
| 1028 | case NETDEV_CHANGEADDR: |
| 1029 | case NETDEV_GOING_DOWN: |
| 1030 | break; |
| 1031 | default: |
| 1032 | break; |
| 1033 | } |
| 1034 | |
| 1035 | return NOTIFY_DONE; |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * Functions which are called after a message is received from mpcd. |
| 1040 | * Msg is reused on purpose. |
| 1041 | */ |
| 1042 | |
| 1043 | |
| 1044 | static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) |
| 1045 | { |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 1046 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | in_cache_entry *entry; |
| 1048 | |
| 1049 | entry = mpc->in_ops->get(dst_ip, mpc); |
| 1050 | if(entry == NULL){ |
| 1051 | entry = mpc->in_ops->add_entry(dst_ip, mpc); |
| 1052 | entry->entry_state = INGRESS_RESOLVING; |
| 1053 | msg->type = SND_MPOA_RES_RQST; |
| 1054 | msg->content.in_info = entry->ctrl_info; |
| 1055 | msg_to_mpoad(msg, mpc); |
| 1056 | do_gettimeofday(&(entry->reply_wait)); |
| 1057 | mpc->in_ops->put(entry); |
| 1058 | return; |
| 1059 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | if(entry->entry_state == INGRESS_INVALID){ |
| 1062 | entry->entry_state = INGRESS_RESOLVING; |
| 1063 | msg->type = SND_MPOA_RES_RQST; |
| 1064 | msg->content.in_info = entry->ctrl_info; |
| 1065 | msg_to_mpoad(msg, mpc); |
| 1066 | do_gettimeofday(&(entry->reply_wait)); |
| 1067 | mpc->in_ops->put(entry); |
| 1068 | return; |
| 1069 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", |
| 1072 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
| 1073 | mpc->in_ops->put(entry); |
| 1074 | return; |
| 1075 | } |
| 1076 | |
| 1077 | /* |
| 1078 | * Things get complicated because we have to check if there's an egress |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1079 | * shortcut with suitable traffic parameters we could use. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | */ |
| 1081 | static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) |
| 1082 | { |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 1083 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); |
| 1085 | eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); |
| 1086 | |
| 1087 | if(eg_entry && eg_entry->shortcut){ |
| 1088 | if(eg_entry->shortcut->qos.txtp.traffic_class & |
| 1089 | msg->qos.txtp.traffic_class & |
| 1090 | (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ |
| 1091 | if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) |
| 1092 | entry->shortcut = eg_entry->shortcut; |
| 1093 | else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) |
| 1094 | entry->shortcut = eg_entry->shortcut; |
| 1095 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1096 | if(entry->shortcut){ |
Al Viro | ff7512e | 2006-06-20 03:27:27 -0700 | [diff] [blame] | 1097 | dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | client->eg_ops->put(eg_entry); |
| 1099 | return; |
| 1100 | } |
| 1101 | } |
| 1102 | if (eg_entry != NULL) |
| 1103 | client->eg_ops->put(eg_entry); |
| 1104 | |
| 1105 | /* No luck in the egress cache we must open an ingress SVC */ |
| 1106 | msg->type = OPEN_INGRESS_SVC; |
| 1107 | if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) |
| 1108 | { |
| 1109 | msg->qos = qos->qos; |
| 1110 | printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | else memset(&msg->qos,0,sizeof(struct atm_qos)); |
| 1113 | msg_to_mpoad(msg, client); |
| 1114 | return; |
| 1115 | } |
| 1116 | |
| 1117 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) |
| 1118 | { |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 1119 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); |
Andrew Morton | 1e4fd51 | 2006-06-26 00:01:58 -0700 | [diff] [blame] | 1121 | |
Al Viro | ff7512e | 2006-06-20 03:27:27 -0700 | [diff] [blame] | 1122 | dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); |
| 1124 | if(entry == NULL){ |
| 1125 | printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); |
| 1126 | return; |
| 1127 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1128 | ddprintk(" entry_state = %d ", entry->entry_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
| 1130 | if (entry->entry_state == INGRESS_RESOLVED) { |
| 1131 | printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); |
| 1132 | mpc->in_ops->put(entry); |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | entry->ctrl_info = msg->content.in_info; |
| 1137 | do_gettimeofday(&(entry->tv)); |
| 1138 | do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ |
| 1139 | entry->refresh_time = 0; |
| 1140 | ddprintk("entry->shortcut = %p\n", entry->shortcut); |
| 1141 | |
| 1142 | if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1143 | entry->entry_state = INGRESS_RESOLVED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | mpc->in_ops->put(entry); |
| 1145 | return; /* Shortcut already open... */ |
| 1146 | } |
| 1147 | |
| 1148 | if (entry->shortcut != NULL) { |
| 1149 | printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", |
| 1150 | mpc->dev->name); |
| 1151 | mpc->in_ops->put(entry); |
| 1152 | return; |
| 1153 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | check_qos_and_open_shortcut(msg, mpc, entry); |
| 1156 | entry->entry_state = INGRESS_RESOLVED; |
| 1157 | mpc->in_ops->put(entry); |
| 1158 | |
| 1159 | return; |
| 1160 | |
| 1161 | } |
| 1162 | |
| 1163 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) |
| 1164 | { |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 1165 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
| 1166 | __be32 mask = msg->ip_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); |
| 1168 | |
| 1169 | if(entry == NULL){ |
| 1170 | printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); |
Al Viro | b422993 | 2006-09-26 21:23:43 -0700 | [diff] [blame] | 1171 | printk("ip = %u.%u.%u.%u\n", NIPQUAD(dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | return; |
| 1173 | } |
| 1174 | |
| 1175 | do { |
| 1176 | dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , |
Al Viro | b422993 | 2006-09-26 21:23:43 -0700 | [diff] [blame] | 1177 | mpc->dev->name, NIPQUAD(dst_ip)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | write_lock_bh(&mpc->ingress_lock); |
| 1179 | mpc->in_ops->remove_entry(entry, mpc); |
| 1180 | write_unlock_bh(&mpc->ingress_lock); |
| 1181 | mpc->in_ops->put(entry); |
| 1182 | entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); |
| 1183 | } while (entry != NULL); |
| 1184 | |
| 1185 | return; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | |
| 1188 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) |
| 1189 | { |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 1190 | __be32 cache_id = msg->content.eg_info.cache_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | if (entry == NULL) { |
| 1194 | dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); |
| 1195 | return; |
| 1196 | } |
| 1197 | |
| 1198 | write_lock_irq(&mpc->egress_lock); |
| 1199 | mpc->eg_ops->remove_entry(entry, mpc); |
| 1200 | write_unlock_irq(&mpc->egress_lock); |
| 1201 | |
| 1202 | mpc->eg_ops->put(entry); |
| 1203 | |
| 1204 | return; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1205 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) |
| 1208 | { |
| 1209 | struct sock *sk; |
| 1210 | struct k_message *purge_msg; |
| 1211 | struct sk_buff *skb; |
| 1212 | |
| 1213 | dprintk("mpoa: purge_egress_shortcut: entering\n"); |
| 1214 | if (vcc == NULL) { |
| 1215 | printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); |
| 1216 | return; |
| 1217 | } |
| 1218 | |
| 1219 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); |
| 1220 | if (skb == NULL) { |
| 1221 | printk("mpoa: purge_egress_shortcut: out of memory\n"); |
| 1222 | return; |
| 1223 | } |
| 1224 | |
| 1225 | skb_put(skb, sizeof(struct k_message)); |
| 1226 | memset(skb->data, 0, sizeof(struct k_message)); |
| 1227 | purge_msg = (struct k_message *)skb->data; |
| 1228 | purge_msg->type = DATA_PLANE_PURGE; |
| 1229 | if (entry != NULL) |
| 1230 | purge_msg->content.eg_info = entry->ctrl_info; |
| 1231 | |
| 1232 | atm_force_charge(vcc, skb->truesize); |
| 1233 | |
| 1234 | sk = sk_atm(vcc); |
| 1235 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 1236 | sk->sk_data_ready(sk, skb->len); |
| 1237 | dprintk("mpoa: purge_egress_shortcut: exiting:\n"); |
| 1238 | |
| 1239 | return; |
| 1240 | } |
| 1241 | |
| 1242 | /* |
| 1243 | * Our MPS died. Tell our daemon to send NHRP data plane purge to each |
| 1244 | * of the egress shortcuts we have. |
| 1245 | */ |
| 1246 | static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) |
| 1247 | { |
| 1248 | eg_cache_entry *entry; |
| 1249 | |
| 1250 | dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); |
| 1251 | |
| 1252 | if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ |
| 1253 | printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); |
| 1254 | return; |
| 1255 | } |
| 1256 | |
| 1257 | /* FIXME: This knows too much of the cache structure */ |
| 1258 | read_lock_irq(&mpc->egress_lock); |
| 1259 | entry = mpc->eg_cache; |
| 1260 | while (entry != NULL) { |
| 1261 | purge_egress_shortcut(entry->shortcut, entry); |
| 1262 | entry = entry->next; |
| 1263 | } |
| 1264 | read_unlock_irq(&mpc->egress_lock); |
| 1265 | |
| 1266 | mpc->in_ops->destroy_cache(mpc); |
| 1267 | mpc->eg_ops->destroy_cache(mpc); |
| 1268 | |
| 1269 | return; |
| 1270 | } |
| 1271 | |
| 1272 | static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) |
| 1273 | { |
| 1274 | uint16_t holding_time; |
| 1275 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | holding_time = msg->content.eg_info.holding_time; |
| 1278 | dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", |
| 1279 | mpc->dev->name, entry, holding_time); |
| 1280 | if(entry == NULL && holding_time) { |
| 1281 | entry = mpc->eg_ops->add_entry(msg, mpc); |
| 1282 | mpc->eg_ops->put(entry); |
| 1283 | return; |
| 1284 | } |
| 1285 | if(holding_time){ |
| 1286 | mpc->eg_ops->update(entry, holding_time); |
| 1287 | return; |
| 1288 | } |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | write_lock_irq(&mpc->egress_lock); |
| 1291 | mpc->eg_ops->remove_entry(entry, mpc); |
| 1292 | write_unlock_irq(&mpc->egress_lock); |
| 1293 | |
| 1294 | mpc->eg_ops->put(entry); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | return; |
| 1297 | } |
| 1298 | |
| 1299 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) |
| 1300 | { |
| 1301 | struct lec_priv *priv; |
| 1302 | int i, retval ; |
| 1303 | |
| 1304 | uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; |
| 1305 | |
| 1306 | tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ |
| 1307 | tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ |
| 1308 | tlv[5] = 0x02; /* MPOA client */ |
| 1309 | tlv[6] = 0x00; /* number of MPS MAC addresses */ |
| 1310 | |
| 1311 | memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ |
| 1312 | memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); |
| 1313 | |
| 1314 | dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", |
| 1315 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
| 1316 | for (i = 7; i < sizeof(tlv); i++) |
| 1317 | dprintk("%02x ", tlv[i]); |
| 1318 | dprintk("\n"); |
| 1319 | |
| 1320 | if (mpc->dev) { |
| 1321 | priv = (struct lec_priv *)mpc->dev->priv; |
| 1322 | retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); |
| 1323 | if (retval == 0) |
| 1324 | printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); |
| 1325 | retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); |
| 1326 | if (retval < 0) |
| 1327 | printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); |
| 1328 | } |
| 1329 | |
| 1330 | return; |
| 1331 | } |
| 1332 | |
| 1333 | static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) |
| 1334 | { |
| 1335 | |
| 1336 | if(client->number_of_mps_macs) |
| 1337 | kfree(client->mps_macs); |
| 1338 | client->number_of_mps_macs = 0; |
Arnaldo Carvalho de Melo | 2afe37c | 2006-11-21 01:14:33 -0200 | [diff] [blame] | 1339 | client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | if (client->mps_macs == NULL) { |
| 1341 | printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); |
| 1342 | return; |
| 1343 | } |
| 1344 | client->number_of_mps_macs = 1; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | return; |
| 1347 | } |
| 1348 | |
| 1349 | /* |
| 1350 | * purge egress cache and tell daemon to 'action' (DIE, RELOAD) |
| 1351 | */ |
| 1352 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) |
| 1353 | { |
| 1354 | |
| 1355 | eg_cache_entry *entry; |
| 1356 | msg->type = SND_EGRESS_PURGE; |
| 1357 | |
| 1358 | |
| 1359 | /* FIXME: This knows too much of the cache structure */ |
| 1360 | read_lock_irq(&mpc->egress_lock); |
| 1361 | entry = mpc->eg_cache; |
| 1362 | while (entry != NULL){ |
| 1363 | msg->content.eg_info = entry->ctrl_info; |
| 1364 | dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); |
| 1365 | msg_to_mpoad(msg, mpc); |
| 1366 | entry = entry->next; |
| 1367 | } |
| 1368 | read_unlock_irq(&mpc->egress_lock); |
| 1369 | |
| 1370 | msg->type = action; |
| 1371 | msg_to_mpoad(msg, mpc); |
| 1372 | return; |
| 1373 | } |
| 1374 | |
| 1375 | static void mpc_timer_refresh(void) |
| 1376 | { |
| 1377 | mpc_timer.expires = jiffies + (MPC_P2 * HZ); |
| 1378 | mpc_timer.data = mpc_timer.expires; |
| 1379 | mpc_timer.function = mpc_cache_check; |
| 1380 | add_timer(&mpc_timer); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | return; |
| 1383 | } |
| 1384 | |
| 1385 | static void mpc_cache_check( unsigned long checking_time ) |
| 1386 | { |
| 1387 | struct mpoa_client *mpc = mpcs; |
| 1388 | static unsigned long previous_resolving_check_time; |
| 1389 | static unsigned long previous_refresh_time; |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | while( mpc != NULL ){ |
| 1392 | mpc->in_ops->clear_count(mpc); |
| 1393 | mpc->eg_ops->clear_expired(mpc); |
| 1394 | if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ |
| 1395 | mpc->in_ops->check_resolving(mpc); |
| 1396 | previous_resolving_check_time = checking_time; |
| 1397 | } |
| 1398 | if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ |
| 1399 | mpc->in_ops->refresh(mpc); |
| 1400 | previous_refresh_time = checking_time; |
| 1401 | } |
| 1402 | mpc = mpc->next; |
| 1403 | } |
| 1404 | mpc_timer_refresh(); |
YOSHIFUJI Hideaki | f7d5745 | 2007-02-09 23:24:29 +0900 | [diff] [blame] | 1405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | return; |
| 1407 | } |
| 1408 | |
| 1409 | static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1410 | { |
| 1411 | int err = 0; |
| 1412 | struct atm_vcc *vcc = ATM_SD(sock); |
| 1413 | |
| 1414 | if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) |
| 1415 | return -ENOIOCTLCMD; |
| 1416 | |
| 1417 | if (!capable(CAP_NET_ADMIN)) |
| 1418 | return -EPERM; |
| 1419 | |
| 1420 | switch (cmd) { |
| 1421 | case ATMMPC_CTRL: |
| 1422 | err = atm_mpoa_mpoad_attach(vcc, (int)arg); |
| 1423 | if (err >= 0) |
| 1424 | sock->state = SS_CONNECTED; |
| 1425 | break; |
| 1426 | case ATMMPC_DATA: |
| 1427 | err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); |
| 1428 | break; |
| 1429 | default: |
| 1430 | break; |
| 1431 | } |
| 1432 | return err; |
| 1433 | } |
| 1434 | |
| 1435 | |
| 1436 | static struct atm_ioctl atm_ioctl_ops = { |
| 1437 | .owner = THIS_MODULE, |
| 1438 | .ioctl = atm_mpoa_ioctl, |
| 1439 | }; |
| 1440 | |
| 1441 | static __init int atm_mpoa_init(void) |
| 1442 | { |
| 1443 | register_atm_ioctl(&atm_ioctl_ops); |
| 1444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | if (mpc_proc_init() != 0) |
| 1446 | printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
| 1448 | printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); |
| 1449 | |
| 1450 | return 0; |
| 1451 | } |
| 1452 | |
| 1453 | static void __exit atm_mpoa_cleanup(void) |
| 1454 | { |
| 1455 | struct mpoa_client *mpc, *tmp; |
| 1456 | struct atm_mpoa_qos *qos, *nextqos; |
| 1457 | struct lec_priv *priv; |
| 1458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | mpc_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | |
| 1461 | del_timer(&mpc_timer); |
| 1462 | unregister_netdevice_notifier(&mpoa_notifier); |
| 1463 | deregister_atm_ioctl(&atm_ioctl_ops); |
| 1464 | |
| 1465 | mpc = mpcs; |
| 1466 | mpcs = NULL; |
| 1467 | while (mpc != NULL) { |
| 1468 | tmp = mpc->next; |
| 1469 | if (mpc->dev != NULL) { |
| 1470 | stop_mpc(mpc); |
| 1471 | priv = (struct lec_priv *)mpc->dev->priv; |
| 1472 | if (priv->lane2_ops != NULL) |
| 1473 | priv->lane2_ops->associate_indicator = NULL; |
| 1474 | } |
| 1475 | ddprintk("mpoa: cleanup_module: about to clear caches\n"); |
| 1476 | mpc->in_ops->destroy_cache(mpc); |
| 1477 | mpc->eg_ops->destroy_cache(mpc); |
| 1478 | ddprintk("mpoa: cleanup_module: caches cleared\n"); |
| 1479 | kfree(mpc->mps_macs); |
| 1480 | memset(mpc, 0, sizeof(struct mpoa_client)); |
| 1481 | ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); |
| 1482 | kfree(mpc); |
| 1483 | ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); |
| 1484 | mpc = tmp; |
| 1485 | } |
| 1486 | |
| 1487 | qos = qos_head; |
| 1488 | qos_head = NULL; |
| 1489 | while (qos != NULL) { |
| 1490 | nextqos = qos->next; |
| 1491 | dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); |
| 1492 | kfree(qos); |
| 1493 | qos = nextqos; |
| 1494 | } |
| 1495 | |
| 1496 | return; |
| 1497 | } |
| 1498 | |
| 1499 | module_init(atm_mpoa_init); |
| 1500 | module_exit(atm_mpoa_cleanup); |
| 1501 | |
| 1502 | MODULE_LICENSE("GPL"); |