Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * lec.c: Lan Emulation driver |
| 3 | * Marko Kiiskila mkiiskila@yahoo.com |
| 4 | * |
| 5 | */ |
| 6 | |
| 7 | #include <linux/config.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/bitops.h> |
| 10 | |
| 11 | /* We are ethernet device */ |
| 12 | #include <linux/if_ether.h> |
| 13 | #include <linux/netdevice.h> |
| 14 | #include <linux/etherdevice.h> |
| 15 | #include <net/sock.h> |
| 16 | #include <linux/skbuff.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <asm/byteorder.h> |
| 19 | #include <asm/uaccess.h> |
| 20 | #include <net/arp.h> |
| 21 | #include <net/dst.h> |
| 22 | #include <linux/proc_fs.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | #include <linux/proc_fs.h> |
| 25 | #include <linux/seq_file.h> |
| 26 | |
| 27 | /* TokenRing if needed */ |
| 28 | #ifdef CONFIG_TR |
| 29 | #include <linux/trdevice.h> |
| 30 | #endif |
| 31 | |
| 32 | /* And atm device */ |
| 33 | #include <linux/atmdev.h> |
| 34 | #include <linux/atmlec.h> |
| 35 | |
| 36 | /* Proxy LEC knows about bridging */ |
| 37 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 38 | #include <linux/if_bridge.h> |
| 39 | #include "../bridge/br_private.h" |
| 40 | |
| 41 | static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00}; |
| 42 | #endif |
| 43 | |
| 44 | /* Modular too */ |
| 45 | #include <linux/module.h> |
| 46 | #include <linux/init.h> |
| 47 | |
| 48 | #include "lec.h" |
| 49 | #include "lec_arpc.h" |
| 50 | #include "resources.h" |
| 51 | |
| 52 | #if 0 |
| 53 | #define DPRINTK printk |
| 54 | #else |
| 55 | #define DPRINTK(format,args...) |
| 56 | #endif |
| 57 | |
| 58 | #define DUMP_PACKETS 0 /* 0 = None, |
| 59 | * 1 = 30 first bytes |
| 60 | * 2 = Whole packet |
| 61 | */ |
| 62 | |
| 63 | #define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a |
| 64 | single destination while waiting for SVC */ |
| 65 | |
| 66 | static int lec_open(struct net_device *dev); |
| 67 | static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); |
| 68 | static int lec_close(struct net_device *dev); |
| 69 | static struct net_device_stats *lec_get_stats(struct net_device *dev); |
| 70 | static void lec_init(struct net_device *dev); |
| 71 | static struct lec_arp_table* lec_arp_find(struct lec_priv *priv, |
| 72 | unsigned char *mac_addr); |
| 73 | static int lec_arp_remove(struct lec_priv *priv, |
| 74 | struct lec_arp_table *to_remove); |
| 75 | /* LANE2 functions */ |
| 76 | static void lane2_associate_ind (struct net_device *dev, u8 *mac_address, |
| 77 | u8 *tlvs, u32 sizeoftlvs); |
| 78 | static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, |
| 79 | u8 **tlvs, u32 *sizeoftlvs); |
| 80 | static int lane2_associate_req (struct net_device *dev, u8 *lan_dst, |
| 81 | u8 *tlvs, u32 sizeoftlvs); |
| 82 | |
| 83 | static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, |
| 84 | unsigned long permanent); |
| 85 | static void lec_arp_check_empties(struct lec_priv *priv, |
| 86 | struct atm_vcc *vcc, struct sk_buff *skb); |
| 87 | static void lec_arp_destroy(struct lec_priv *priv); |
| 88 | static void lec_arp_init(struct lec_priv *priv); |
| 89 | static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv, |
| 90 | unsigned char *mac_to_find, |
| 91 | int is_rdesc, |
| 92 | struct lec_arp_table **ret_entry); |
| 93 | static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, |
| 94 | unsigned char *atm_addr, unsigned long remoteflag, |
| 95 | unsigned int targetless_le_arp); |
| 96 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
| 97 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
| 98 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
| 99 | unsigned char *atm_addr, |
| 100 | unsigned long tran_id); |
| 101 | static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, |
| 102 | struct atm_vcc *vcc, |
| 103 | void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb)); |
| 104 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
| 105 | |
| 106 | static struct lane2_ops lane2_ops = { |
| 107 | lane2_resolve, /* resolve, spec 3.1.3 */ |
| 108 | lane2_associate_req, /* associate_req, spec 3.1.4 */ |
| 109 | NULL /* associate indicator, spec 3.1.5 */ |
| 110 | }; |
| 111 | |
| 112 | static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff}; |
| 113 | |
| 114 | /* Device structures */ |
| 115 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
| 116 | |
| 117 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 118 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
| 119 | { |
| 120 | struct ethhdr *eth; |
| 121 | char *buff; |
| 122 | struct lec_priv *priv; |
| 123 | |
| 124 | /* Check if this is a BPDU. If so, ask zeppelin to send |
| 125 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
| 126 | * as the Config BPDU has */ |
| 127 | eth = (struct ethhdr *)skb->data; |
| 128 | buff = skb->data + skb->dev->hard_header_len; |
| 129 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
| 130 | struct sock *sk; |
| 131 | struct sk_buff *skb2; |
| 132 | struct atmlec_msg *mesg; |
| 133 | |
| 134 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 135 | if (skb2 == NULL) return; |
| 136 | skb2->len = sizeof(struct atmlec_msg); |
| 137 | mesg = (struct atmlec_msg *)skb2->data; |
| 138 | mesg->type = l_topology_change; |
| 139 | buff += 4; |
| 140 | mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ |
| 141 | |
| 142 | priv = (struct lec_priv *)dev->priv; |
| 143 | atm_force_charge(priv->lecd, skb2->truesize); |
| 144 | sk = sk_atm(priv->lecd); |
| 145 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
| 146 | sk->sk_data_ready(sk, skb2->len); |
| 147 | } |
| 148 | |
| 149 | return; |
| 150 | } |
| 151 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
| 152 | |
| 153 | /* |
| 154 | * Modelled after tr_type_trans |
| 155 | * All multicast and ARE or STE frames go to BUS. |
| 156 | * Non source routed frames go by destination address. |
| 157 | * Last hop source routed frames go by destination address. |
| 158 | * Not last hop source routed frames go by _next_ route descriptor. |
| 159 | * Returns pointer to destination MAC address or fills in rdesc |
| 160 | * and returns NULL. |
| 161 | */ |
| 162 | #ifdef CONFIG_TR |
| 163 | static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) |
| 164 | { |
| 165 | struct trh_hdr *trh; |
| 166 | int riflen, num_rdsc; |
| 167 | |
| 168 | trh = (struct trh_hdr *)packet; |
| 169 | if (trh->daddr[0] & (uint8_t)0x80) |
| 170 | return bus_mac; /* multicast */ |
| 171 | |
| 172 | if (trh->saddr[0] & TR_RII) { |
| 173 | riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; |
| 174 | if ((ntohs(trh->rcf) >> 13) != 0) |
| 175 | return bus_mac; /* ARE or STE */ |
| 176 | } |
| 177 | else |
| 178 | return trh->daddr; /* not source routed */ |
| 179 | |
| 180 | if (riflen < 6) |
| 181 | return trh->daddr; /* last hop, source routed */ |
| 182 | |
| 183 | /* riflen is 6 or more, packet has more than one route descriptor */ |
| 184 | num_rdsc = (riflen/2) - 1; |
| 185 | memset(rdesc, 0, ETH_ALEN); |
| 186 | /* offset 4 comes from LAN destination field in LE control frames */ |
| 187 | if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT)) |
| 188 | memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t)); |
| 189 | else { |
| 190 | memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t)); |
| 191 | rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); |
| 192 | } |
| 193 | |
| 194 | return NULL; |
| 195 | } |
| 196 | #endif /* CONFIG_TR */ |
| 197 | |
| 198 | /* |
| 199 | * Open/initialize the netdevice. This is called (in the current kernel) |
| 200 | * sometime after booting when the 'ifconfig' program is run. |
| 201 | * |
| 202 | * This routine should set everything up anew at each open, even |
| 203 | * registers that "should" only need to be set once at boot, so that |
| 204 | * there is non-reboot way to recover if something goes wrong. |
| 205 | */ |
| 206 | |
| 207 | static int |
| 208 | lec_open(struct net_device *dev) |
| 209 | { |
| 210 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 211 | |
| 212 | netif_start_queue(dev); |
| 213 | memset(&priv->stats,0,sizeof(struct net_device_stats)); |
| 214 | |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | static __inline__ void |
| 219 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) |
| 220 | { |
| 221 | ATM_SKB(skb)->vcc = vcc; |
| 222 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
| 223 | |
| 224 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
| 225 | if (vcc->send(vcc, skb) < 0) { |
| 226 | priv->stats.tx_dropped++; |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | priv->stats.tx_packets++; |
| 231 | priv->stats.tx_bytes += skb->len; |
| 232 | } |
| 233 | |
| 234 | static void |
| 235 | lec_tx_timeout(struct net_device *dev) |
| 236 | { |
| 237 | printk(KERN_INFO "%s: tx timeout\n", dev->name); |
| 238 | dev->trans_start = jiffies; |
| 239 | netif_wake_queue(dev); |
| 240 | } |
| 241 | |
| 242 | static int |
| 243 | lec_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 244 | { |
| 245 | struct sk_buff *skb2; |
| 246 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 247 | struct lecdatahdr_8023 *lec_h; |
| 248 | struct atm_vcc *vcc; |
| 249 | struct lec_arp_table *entry; |
| 250 | unsigned char *dst; |
| 251 | int min_frame_size; |
| 252 | #ifdef CONFIG_TR |
| 253 | unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ |
| 254 | #endif |
| 255 | int is_rdesc; |
| 256 | #if DUMP_PACKETS > 0 |
| 257 | char buf[300]; |
| 258 | int i=0; |
| 259 | #endif /* DUMP_PACKETS >0 */ |
| 260 | |
| 261 | DPRINTK("lec_start_xmit called\n"); |
| 262 | if (!priv->lecd) { |
| 263 | printk("%s:No lecd attached\n",dev->name); |
| 264 | priv->stats.tx_errors++; |
| 265 | netif_stop_queue(dev); |
| 266 | return -EUNATCH; |
| 267 | } |
| 268 | |
| 269 | DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
| 270 | (long)skb->head, (long)skb->data, (long)skb->tail, |
| 271 | (long)skb->end); |
| 272 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 273 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
| 274 | lec_handle_bridge(skb, dev); |
| 275 | #endif |
| 276 | |
| 277 | /* Make sure we have room for lec_id */ |
| 278 | if (skb_headroom(skb) < 2) { |
| 279 | |
| 280 | DPRINTK("lec_start_xmit: reallocating skb\n"); |
| 281 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
| 282 | kfree_skb(skb); |
| 283 | if (skb2 == NULL) return 0; |
| 284 | skb = skb2; |
| 285 | } |
| 286 | skb_push(skb, 2); |
| 287 | |
| 288 | /* Put le header to place, works for TokenRing too */ |
| 289 | lec_h = (struct lecdatahdr_8023*)skb->data; |
| 290 | lec_h->le_header = htons(priv->lecid); |
| 291 | |
| 292 | #ifdef CONFIG_TR |
| 293 | /* Ugly. Use this to realign Token Ring packets for |
| 294 | * e.g. PCA-200E driver. */ |
| 295 | if (priv->is_trdev) { |
| 296 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
| 297 | kfree_skb(skb); |
| 298 | if (skb2 == NULL) return 0; |
| 299 | skb = skb2; |
| 300 | } |
| 301 | #endif |
| 302 | |
| 303 | #if DUMP_PACKETS > 0 |
| 304 | printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, |
| 305 | skb->len, priv->lecid); |
| 306 | #if DUMP_PACKETS >= 2 |
| 307 | for(i=0;i<skb->len && i <99;i++) { |
| 308 | sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]); |
| 309 | } |
| 310 | #elif DUMP_PACKETS >= 1 |
| 311 | for(i=0;i<skb->len && i < 30;i++) { |
| 312 | sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]); |
| 313 | } |
| 314 | #endif /* DUMP_PACKETS >= 1 */ |
| 315 | if (i==skb->len) |
| 316 | printk("%s\n",buf); |
| 317 | else |
| 318 | printk("%s...\n",buf); |
| 319 | #endif /* DUMP_PACKETS > 0 */ |
| 320 | |
| 321 | /* Minimum ethernet-frame size */ |
| 322 | #ifdef CONFIG_TR |
| 323 | if (priv->is_trdev) |
| 324 | min_frame_size = LEC_MINIMUM_8025_SIZE; |
| 325 | else |
| 326 | #endif |
| 327 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
| 328 | if (skb->len < min_frame_size) { |
| 329 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
| 330 | skb2 = skb_copy_expand(skb, 0, |
| 331 | min_frame_size - skb->truesize, GFP_ATOMIC); |
| 332 | dev_kfree_skb(skb); |
| 333 | if (skb2 == NULL) { |
| 334 | priv->stats.tx_dropped++; |
| 335 | return 0; |
| 336 | } |
| 337 | skb = skb2; |
| 338 | } |
| 339 | skb_put(skb, min_frame_size - skb->len); |
| 340 | } |
| 341 | |
| 342 | /* Send to right vcc */ |
| 343 | is_rdesc = 0; |
| 344 | dst = lec_h->h_dest; |
| 345 | #ifdef CONFIG_TR |
| 346 | if (priv->is_trdev) { |
| 347 | dst = get_tr_dst(skb->data+2, rdesc); |
| 348 | if (dst == NULL) { |
| 349 | dst = rdesc; |
| 350 | is_rdesc = 1; |
| 351 | } |
| 352 | } |
| 353 | #endif |
| 354 | entry = NULL; |
| 355 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); |
| 356 | DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name, |
| 357 | vcc, vcc?vcc->flags:0, entry); |
| 358 | if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) { |
| 359 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
| 360 | DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name); |
| 361 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 362 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
| 363 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
| 364 | skb_queue_tail(&entry->tx_wait, skb); |
| 365 | } else { |
| 366 | DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name); |
| 367 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 368 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
| 369 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
| 370 | priv->stats.tx_dropped++; |
| 371 | dev_kfree_skb(skb); |
| 372 | } |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | #if DUMP_PACKETS > 0 |
| 377 | printk("%s:sending to vpi:%d vci:%d\n", dev->name, |
| 378 | vcc->vpi, vcc->vci); |
| 379 | #endif /* DUMP_PACKETS > 0 */ |
| 380 | |
| 381 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { |
| 382 | DPRINTK("lec.c: emptying tx queue, "); |
| 383 | DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 384 | lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2], |
| 385 | lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]); |
| 386 | lec_send(vcc, skb2, priv); |
| 387 | } |
| 388 | |
| 389 | lec_send(vcc, skb, priv); |
| 390 | |
| 391 | if (!atm_may_send(vcc, 0)) { |
| 392 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 393 | |
| 394 | vpriv->xoff = 1; |
| 395 | netif_stop_queue(dev); |
| 396 | |
| 397 | /* |
| 398 | * vcc->pop() might have occurred in between, making |
| 399 | * the vcc usuable again. Since xmit is serialized, |
| 400 | * this is the only situation we have to re-test. |
| 401 | */ |
| 402 | |
| 403 | if (atm_may_send(vcc, 0)) |
| 404 | netif_wake_queue(dev); |
| 405 | } |
| 406 | |
| 407 | dev->trans_start = jiffies; |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | /* The inverse routine to net_open(). */ |
| 412 | static int |
| 413 | lec_close(struct net_device *dev) |
| 414 | { |
| 415 | netif_stop_queue(dev); |
| 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * Get the current statistics. |
| 421 | * This may be called with the card open or closed. |
| 422 | */ |
| 423 | static struct net_device_stats * |
| 424 | lec_get_stats(struct net_device *dev) |
| 425 | { |
| 426 | return &((struct lec_priv *)dev->priv)->stats; |
| 427 | } |
| 428 | |
| 429 | static int |
| 430 | lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
| 431 | { |
| 432 | unsigned long flags; |
| 433 | struct net_device *dev = (struct net_device*)vcc->proto_data; |
| 434 | struct lec_priv *priv = (struct lec_priv*)dev->priv; |
| 435 | struct atmlec_msg *mesg; |
| 436 | struct lec_arp_table *entry; |
| 437 | int i; |
| 438 | char *tmp; /* FIXME */ |
| 439 | |
| 440 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
| 441 | mesg = (struct atmlec_msg *)skb->data; |
| 442 | tmp = skb->data; |
| 443 | tmp += sizeof(struct atmlec_msg); |
| 444 | DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
| 445 | switch(mesg->type) { |
| 446 | case l_set_mac_addr: |
| 447 | for (i=0;i<6;i++) { |
| 448 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
| 449 | } |
| 450 | break; |
| 451 | case l_del_mac_addr: |
| 452 | for(i=0;i<6;i++) { |
| 453 | dev->dev_addr[i] = 0; |
| 454 | } |
| 455 | break; |
| 456 | case l_addr_delete: |
| 457 | lec_addr_delete(priv, mesg->content.normal.atm_addr, |
| 458 | mesg->content.normal.flag); |
| 459 | break; |
| 460 | case l_topology_change: |
| 461 | priv->topology_change = mesg->content.normal.flag; |
| 462 | break; |
| 463 | case l_flush_complete: |
| 464 | lec_flush_complete(priv, mesg->content.normal.flag); |
| 465 | break; |
| 466 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
| 467 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 468 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
| 469 | lec_arp_remove(priv, entry); |
| 470 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 471 | |
| 472 | if (mesg->content.normal.no_source_le_narp) |
| 473 | break; |
| 474 | /* FALL THROUGH */ |
| 475 | case l_arp_update: |
| 476 | lec_arp_update(priv, mesg->content.normal.mac_addr, |
| 477 | mesg->content.normal.atm_addr, |
| 478 | mesg->content.normal.flag, |
| 479 | mesg->content.normal.targetless_le_arp); |
| 480 | DPRINTK("lec: in l_arp_update\n"); |
| 481 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
| 482 | DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs); |
| 483 | lane2_associate_ind(dev, |
| 484 | mesg->content.normal.mac_addr, |
| 485 | tmp, mesg->sizeoftlvs); |
| 486 | } |
| 487 | break; |
| 488 | case l_config: |
| 489 | priv->maximum_unknown_frame_count = |
| 490 | mesg->content.config.maximum_unknown_frame_count; |
| 491 | priv->max_unknown_frame_time = |
| 492 | (mesg->content.config.max_unknown_frame_time*HZ); |
| 493 | priv->max_retry_count = |
| 494 | mesg->content.config.max_retry_count; |
| 495 | priv->aging_time = (mesg->content.config.aging_time*HZ); |
| 496 | priv->forward_delay_time = |
| 497 | (mesg->content.config.forward_delay_time*HZ); |
| 498 | priv->arp_response_time = |
| 499 | (mesg->content.config.arp_response_time*HZ); |
| 500 | priv->flush_timeout = (mesg->content.config.flush_timeout*HZ); |
| 501 | priv->path_switching_delay = |
| 502 | (mesg->content.config.path_switching_delay*HZ); |
| 503 | priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ |
| 504 | priv->lane2_ops = NULL; |
| 505 | if (priv->lane_version > 1) |
| 506 | priv->lane2_ops = &lane2_ops; |
| 507 | if (dev->change_mtu(dev, mesg->content.config.mtu)) |
| 508 | printk("%s: change_mtu to %d failed\n", dev->name, |
| 509 | mesg->content.config.mtu); |
| 510 | priv->is_proxy = mesg->content.config.is_proxy; |
| 511 | break; |
| 512 | case l_flush_tran_id: |
| 513 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, |
| 514 | mesg->content.normal.flag); |
| 515 | break; |
| 516 | case l_set_lecid: |
| 517 | priv->lecid=(unsigned short)(0xffff&mesg->content.normal.flag); |
| 518 | break; |
| 519 | case l_should_bridge: { |
| 520 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 521 | struct net_bridge_fdb_entry *f; |
| 522 | |
| 523 | DPRINTK("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 524 | dev->name, |
| 525 | mesg->content.proxy.mac_addr[0], mesg->content.proxy.mac_addr[1], |
| 526 | mesg->content.proxy.mac_addr[2], mesg->content.proxy.mac_addr[3], |
| 527 | mesg->content.proxy.mac_addr[4], mesg->content.proxy.mac_addr[5]); |
| 528 | |
| 529 | if (br_fdb_get_hook == NULL || dev->br_port == NULL) |
| 530 | break; |
| 531 | |
| 532 | f = br_fdb_get_hook(dev->br_port->br, mesg->content.proxy.mac_addr); |
| 533 | if (f != NULL && |
| 534 | f->dst->dev != dev && |
| 535 | f->dst->state == BR_STATE_FORWARDING) { |
| 536 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
| 537 | struct sk_buff *skb2; |
| 538 | struct sock *sk; |
| 539 | |
| 540 | DPRINTK("%s: entry found, responding to zeppelin\n", dev->name); |
| 541 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 542 | if (skb2 == NULL) { |
| 543 | br_fdb_put_hook(f); |
| 544 | break; |
| 545 | } |
| 546 | skb2->len = sizeof(struct atmlec_msg); |
| 547 | memcpy(skb2->data, mesg, sizeof(struct atmlec_msg)); |
| 548 | atm_force_charge(priv->lecd, skb2->truesize); |
| 549 | sk = sk_atm(priv->lecd); |
| 550 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
| 551 | sk->sk_data_ready(sk, skb2->len); |
| 552 | } |
| 553 | if (f != NULL) br_fdb_put_hook(f); |
| 554 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
| 555 | } |
| 556 | break; |
| 557 | default: |
| 558 | printk("%s: Unknown message type %d\n", dev->name, mesg->type); |
| 559 | dev_kfree_skb(skb); |
| 560 | return -EINVAL; |
| 561 | } |
| 562 | dev_kfree_skb(skb); |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | static void |
| 567 | lec_atm_close(struct atm_vcc *vcc) |
| 568 | { |
| 569 | struct sk_buff *skb; |
| 570 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 571 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 572 | |
| 573 | priv->lecd = NULL; |
| 574 | /* Do something needful? */ |
| 575 | |
| 576 | netif_stop_queue(dev); |
| 577 | lec_arp_destroy(priv); |
| 578 | |
| 579 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
| 580 | printk("%s lec_atm_close: closing with messages pending\n", |
| 581 | dev->name); |
| 582 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { |
| 583 | atm_return(vcc, skb->truesize); |
| 584 | dev_kfree_skb(skb); |
| 585 | } |
| 586 | |
| 587 | printk("%s: Shut down!\n", dev->name); |
| 588 | module_put(THIS_MODULE); |
| 589 | } |
| 590 | |
| 591 | static struct atmdev_ops lecdev_ops = { |
| 592 | .close = lec_atm_close, |
| 593 | .send = lec_atm_send |
| 594 | }; |
| 595 | |
| 596 | static struct atm_dev lecatm_dev = { |
| 597 | .ops = &lecdev_ops, |
| 598 | .type = "lec", |
| 599 | .number = 999, /* dummy device number */ |
| 600 | .lock = SPIN_LOCK_UNLOCKED |
| 601 | }; |
| 602 | |
| 603 | /* |
| 604 | * LANE2: new argument struct sk_buff *data contains |
| 605 | * the LE_ARP based TLVs introduced in the LANE2 spec |
| 606 | */ |
| 607 | static int |
| 608 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
| 609 | unsigned char *mac_addr, unsigned char *atm_addr, |
| 610 | struct sk_buff *data) |
| 611 | { |
| 612 | struct sock *sk; |
| 613 | struct sk_buff *skb; |
| 614 | struct atmlec_msg *mesg; |
| 615 | |
| 616 | if (!priv || !priv->lecd) { |
| 617 | return -1; |
| 618 | } |
| 619 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 620 | if (!skb) |
| 621 | return -1; |
| 622 | skb->len = sizeof(struct atmlec_msg); |
| 623 | mesg = (struct atmlec_msg *)skb->data; |
| 624 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
| 625 | mesg->type = type; |
| 626 | if (data != NULL) |
| 627 | mesg->sizeoftlvs = data->len; |
| 628 | if (mac_addr) |
| 629 | memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); |
| 630 | else |
| 631 | mesg->content.normal.targetless_le_arp = 1; |
| 632 | if (atm_addr) |
| 633 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
| 634 | |
| 635 | atm_force_charge(priv->lecd, skb->truesize); |
| 636 | sk = sk_atm(priv->lecd); |
| 637 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 638 | sk->sk_data_ready(sk, skb->len); |
| 639 | |
| 640 | if (data != NULL) { |
| 641 | DPRINTK("lec: about to send %d bytes of data\n", data->len); |
| 642 | atm_force_charge(priv->lecd, data->truesize); |
| 643 | skb_queue_tail(&sk->sk_receive_queue, data); |
| 644 | sk->sk_data_ready(sk, skb->len); |
| 645 | } |
| 646 | |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | /* shamelessly stolen from drivers/net/net_init.c */ |
| 651 | static int lec_change_mtu(struct net_device *dev, int new_mtu) |
| 652 | { |
| 653 | if ((new_mtu < 68) || (new_mtu > 18190)) |
| 654 | return -EINVAL; |
| 655 | dev->mtu = new_mtu; |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | static void lec_set_multicast_list(struct net_device *dev) |
| 660 | { |
| 661 | /* by default, all multicast frames arrive over the bus. |
| 662 | * eventually support selective multicast service |
| 663 | */ |
| 664 | return; |
| 665 | } |
| 666 | |
| 667 | static void |
| 668 | lec_init(struct net_device *dev) |
| 669 | { |
| 670 | dev->change_mtu = lec_change_mtu; |
| 671 | dev->open = lec_open; |
| 672 | dev->stop = lec_close; |
| 673 | dev->hard_start_xmit = lec_start_xmit; |
| 674 | dev->tx_timeout = lec_tx_timeout; |
| 675 | |
| 676 | dev->get_stats = lec_get_stats; |
| 677 | dev->set_multicast_list = lec_set_multicast_list; |
| 678 | dev->do_ioctl = NULL; |
| 679 | printk("%s: Initialized!\n",dev->name); |
| 680 | return; |
| 681 | } |
| 682 | |
| 683 | static unsigned char lec_ctrl_magic[] = { |
| 684 | 0xff, |
| 685 | 0x00, |
| 686 | 0x01, |
| 687 | 0x01 }; |
| 688 | |
Scott Talbert | 4a7097f | 2005-09-29 17:30:54 -0700 | [diff] [blame] | 689 | #define LEC_DATA_DIRECT_8023 2 |
| 690 | #define LEC_DATA_DIRECT_8025 3 |
| 691 | |
| 692 | static int lec_is_data_direct(struct atm_vcc *vcc) |
| 693 | { |
| 694 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
| 695 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); |
| 696 | } |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | static void |
| 699 | lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
| 700 | { |
Scott Talbert | 4a7097f | 2005-09-29 17:30:54 -0700 | [diff] [blame] | 701 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 703 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 704 | |
| 705 | #if DUMP_PACKETS >0 |
| 706 | int i=0; |
| 707 | char buf[300]; |
| 708 | |
| 709 | printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, |
| 710 | vcc->vpi, vcc->vci); |
| 711 | #endif |
| 712 | if (!skb) { |
| 713 | DPRINTK("%s: null skb\n",dev->name); |
| 714 | lec_vcc_close(priv, vcc); |
| 715 | return; |
| 716 | } |
| 717 | #if DUMP_PACKETS > 0 |
| 718 | printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, |
| 719 | skb->len, priv->lecid); |
| 720 | #if DUMP_PACKETS >= 2 |
| 721 | for(i=0;i<skb->len && i <99;i++) { |
| 722 | sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]); |
| 723 | } |
| 724 | #elif DUMP_PACKETS >= 1 |
| 725 | for(i=0;i<skb->len && i < 30;i++) { |
| 726 | sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]); |
| 727 | } |
| 728 | #endif /* DUMP_PACKETS >= 1 */ |
| 729 | if (i==skb->len) |
| 730 | printk("%s\n",buf); |
| 731 | else |
| 732 | printk("%s...\n",buf); |
| 733 | #endif /* DUMP_PACKETS > 0 */ |
| 734 | if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/ |
| 735 | struct sock *sk = sk_atm(vcc); |
| 736 | |
| 737 | DPRINTK("%s: To daemon\n",dev->name); |
| 738 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 739 | sk->sk_data_ready(sk, skb->len); |
| 740 | } else { /* Data frame, queue to protocol handlers */ |
Scott Talbert | 4a7097f | 2005-09-29 17:30:54 -0700 | [diff] [blame] | 741 | struct lec_arp_table *entry; |
| 742 | unsigned char *src, *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
| 744 | atm_return(vcc,skb->truesize); |
| 745 | if (*(uint16_t *)skb->data == htons(priv->lecid) || |
| 746 | !priv->lecd || |
| 747 | !(dev->flags & IFF_UP)) { |
| 748 | /* Probably looping back, or if lecd is missing, |
| 749 | lecd has gone down */ |
| 750 | DPRINTK("Ignoring frame...\n"); |
| 751 | dev_kfree_skb(skb); |
| 752 | return; |
| 753 | } |
| 754 | #ifdef CONFIG_TR |
Scott Talbert | 4a7097f | 2005-09-29 17:30:54 -0700 | [diff] [blame] | 755 | if (priv->is_trdev) |
| 756 | dst = ((struct lecdatahdr_8025 *) skb->data)->h_dest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | else |
| 758 | #endif |
Scott Talbert | 4a7097f | 2005-09-29 17:30:54 -0700 | [diff] [blame] | 759 | dst = ((struct lecdatahdr_8023 *) skb->data)->h_dest; |
| 760 | |
| 761 | /* If this is a Data Direct VCC, and the VCC does not match |
| 762 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
| 763 | */ |
| 764 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 765 | if (lec_is_data_direct(vcc)) { |
| 766 | #ifdef CONFIG_TR |
| 767 | if (priv->is_trdev) |
| 768 | src = ((struct lecdatahdr_8025 *) skb->data)->h_source; |
| 769 | else |
| 770 | #endif |
| 771 | src = ((struct lecdatahdr_8023 *) skb->data)->h_source; |
| 772 | entry = lec_arp_find(priv, src); |
| 773 | if (entry && entry->vcc != vcc) { |
| 774 | lec_arp_remove(priv, entry); |
| 775 | kfree(entry); |
| 776 | } |
| 777 | } |
| 778 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */ |
| 781 | !priv->is_proxy && /* Proxy wants all the packets */ |
| 782 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
| 783 | dev_kfree_skb(skb); |
| 784 | return; |
| 785 | } |
| 786 | if (priv->lec_arp_empty_ones) { |
| 787 | lec_arp_check_empties(priv, vcc, skb); |
| 788 | } |
| 789 | skb->dev = dev; |
| 790 | skb_pull(skb, 2); /* skip lec_id */ |
| 791 | #ifdef CONFIG_TR |
| 792 | if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev); |
| 793 | else |
| 794 | #endif |
| 795 | skb->protocol = eth_type_trans(skb, dev); |
| 796 | priv->stats.rx_packets++; |
| 797 | priv->stats.rx_bytes += skb->len; |
| 798 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
| 799 | netif_rx(skb); |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | static void |
| 804 | lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
| 805 | { |
| 806 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 807 | struct net_device *dev = skb->dev; |
| 808 | |
| 809 | if (vpriv == NULL) { |
| 810 | printk("lec_pop(): vpriv = NULL!?!?!?\n"); |
| 811 | return; |
| 812 | } |
| 813 | |
| 814 | vpriv->old_pop(vcc, skb); |
| 815 | |
| 816 | if (vpriv->xoff && atm_may_send(vcc, 0)) { |
| 817 | vpriv->xoff = 0; |
| 818 | if (netif_running(dev) && netif_queue_stopped(dev)) |
| 819 | netif_wake_queue(dev); |
| 820 | } |
| 821 | } |
| 822 | |
| 823 | static int |
| 824 | lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
| 825 | { |
| 826 | struct lec_vcc_priv *vpriv; |
| 827 | int bytes_left; |
| 828 | struct atmlec_ioc ioc_data; |
| 829 | |
| 830 | /* Lecd must be up in this case */ |
| 831 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); |
| 832 | if (bytes_left != 0) { |
| 833 | printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n", |
| 834 | bytes_left); |
| 835 | } |
| 836 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
| 837 | !dev_lec[ioc_data.dev_num]) |
| 838 | return -EINVAL; |
| 839 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
| 840 | return -ENOMEM; |
| 841 | vpriv->xoff = 0; |
| 842 | vpriv->old_pop = vcc->pop; |
| 843 | vcc->user_back = vpriv; |
| 844 | vcc->pop = lec_pop; |
| 845 | lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, |
| 846 | &ioc_data, vcc, vcc->push); |
| 847 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
| 848 | vcc->push = lec_push; |
| 849 | return 0; |
| 850 | } |
| 851 | |
| 852 | static int |
| 853 | lec_mcast_attach(struct atm_vcc *vcc, int arg) |
| 854 | { |
| 855 | if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
| 856 | return -EINVAL; |
| 857 | vcc->proto_data = dev_lec[arg]; |
| 858 | return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc)); |
| 859 | } |
| 860 | |
| 861 | /* Initialize device. */ |
| 862 | static int |
| 863 | lecd_attach(struct atm_vcc *vcc, int arg) |
| 864 | { |
| 865 | int i; |
| 866 | struct lec_priv *priv; |
| 867 | |
| 868 | if (arg<0) |
| 869 | i = 0; |
| 870 | else |
| 871 | i = arg; |
| 872 | #ifdef CONFIG_TR |
| 873 | if (arg >= MAX_LEC_ITF) |
| 874 | return -EINVAL; |
| 875 | #else /* Reserve the top NUM_TR_DEVS for TR */ |
| 876 | if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS)) |
| 877 | return -EINVAL; |
| 878 | #endif |
| 879 | if (!dev_lec[i]) { |
| 880 | int is_trdev, size; |
| 881 | |
| 882 | is_trdev = 0; |
| 883 | if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) |
| 884 | is_trdev = 1; |
| 885 | |
| 886 | size = sizeof(struct lec_priv); |
| 887 | #ifdef CONFIG_TR |
| 888 | if (is_trdev) |
| 889 | dev_lec[i] = alloc_trdev(size); |
| 890 | else |
| 891 | #endif |
| 892 | dev_lec[i] = alloc_etherdev(size); |
| 893 | if (!dev_lec[i]) |
| 894 | return -ENOMEM; |
| 895 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
| 896 | if (register_netdev(dev_lec[i])) { |
| 897 | free_netdev(dev_lec[i]); |
| 898 | return -EINVAL; |
| 899 | } |
| 900 | |
| 901 | priv = dev_lec[i]->priv; |
| 902 | priv->is_trdev = is_trdev; |
| 903 | lec_init(dev_lec[i]); |
| 904 | } else { |
| 905 | priv = dev_lec[i]->priv; |
| 906 | if (priv->lecd) |
| 907 | return -EADDRINUSE; |
| 908 | } |
| 909 | lec_arp_init(priv); |
| 910 | priv->itfnum = i; /* LANE2 addition */ |
| 911 | priv->lecd = vcc; |
| 912 | vcc->dev = &lecatm_dev; |
| 913 | vcc_insert_socket(sk_atm(vcc)); |
| 914 | |
| 915 | vcc->proto_data = dev_lec[i]; |
| 916 | set_bit(ATM_VF_META,&vcc->flags); |
| 917 | set_bit(ATM_VF_READY,&vcc->flags); |
| 918 | |
| 919 | /* Set default values to these variables */ |
| 920 | priv->maximum_unknown_frame_count = 1; |
| 921 | priv->max_unknown_frame_time = (1*HZ); |
| 922 | priv->vcc_timeout_period = (1200*HZ); |
| 923 | priv->max_retry_count = 1; |
| 924 | priv->aging_time = (300*HZ); |
| 925 | priv->forward_delay_time = (15*HZ); |
| 926 | priv->topology_change = 0; |
| 927 | priv->arp_response_time = (1*HZ); |
| 928 | priv->flush_timeout = (4*HZ); |
| 929 | priv->path_switching_delay = (6*HZ); |
| 930 | |
| 931 | if (dev_lec[i]->flags & IFF_UP) { |
| 932 | netif_start_queue(dev_lec[i]); |
| 933 | } |
| 934 | __module_get(THIS_MODULE); |
| 935 | return i; |
| 936 | } |
| 937 | |
| 938 | #ifdef CONFIG_PROC_FS |
| 939 | static char* lec_arp_get_status_string(unsigned char status) |
| 940 | { |
| 941 | static char *lec_arp_status_string[] = { |
| 942 | "ESI_UNKNOWN ", |
| 943 | "ESI_ARP_PENDING ", |
| 944 | "ESI_VC_PENDING ", |
| 945 | "<Undefined> ", |
| 946 | "ESI_FLUSH_PENDING ", |
| 947 | "ESI_FORWARD_DIRECT" |
| 948 | }; |
| 949 | |
| 950 | if (status > ESI_FORWARD_DIRECT) |
| 951 | status = 3; /* ESI_UNDEFINED */ |
| 952 | return lec_arp_status_string[status]; |
| 953 | } |
| 954 | |
| 955 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
| 956 | { |
| 957 | int i; |
| 958 | |
| 959 | for (i = 0; i < ETH_ALEN; i++) |
| 960 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); |
| 961 | seq_printf(seq, " "); |
| 962 | for (i = 0; i < ATM_ESA_LEN; i++) |
| 963 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); |
| 964 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), |
| 965 | entry->flags & 0xffff); |
| 966 | if (entry->vcc) |
| 967 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); |
| 968 | else |
| 969 | seq_printf(seq, " "); |
| 970 | if (entry->recv_vcc) { |
| 971 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, |
| 972 | entry->recv_vcc->vci); |
| 973 | } |
| 974 | seq_putc(seq, '\n'); |
| 975 | } |
| 976 | |
| 977 | |
| 978 | struct lec_state { |
| 979 | unsigned long flags; |
| 980 | struct lec_priv *locked; |
| 981 | struct lec_arp_table *entry; |
| 982 | struct net_device *dev; |
| 983 | int itf; |
| 984 | int arp_table; |
| 985 | int misc_table; |
| 986 | }; |
| 987 | |
| 988 | static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl, |
| 989 | loff_t *l) |
| 990 | { |
| 991 | struct lec_arp_table *e = state->entry; |
| 992 | |
| 993 | if (!e) |
| 994 | e = tbl; |
| 995 | if (e == (void *)1) { |
| 996 | e = tbl; |
| 997 | --*l; |
| 998 | } |
| 999 | for (; e; e = e->next) { |
| 1000 | if (--*l < 0) |
| 1001 | break; |
| 1002 | } |
| 1003 | state->entry = e; |
| 1004 | return (*l < 0) ? state : NULL; |
| 1005 | } |
| 1006 | |
| 1007 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
| 1008 | struct lec_priv *priv) |
| 1009 | { |
| 1010 | void *v = NULL; |
| 1011 | int p; |
| 1012 | |
| 1013 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
| 1014 | v = lec_tbl_walk(state, priv->lec_arp_tables[p], l); |
| 1015 | if (v) |
| 1016 | break; |
| 1017 | } |
| 1018 | state->arp_table = p; |
| 1019 | return v; |
| 1020 | } |
| 1021 | |
| 1022 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
| 1023 | struct lec_priv *priv) |
| 1024 | { |
| 1025 | struct lec_arp_table *lec_misc_tables[] = { |
| 1026 | priv->lec_arp_empty_ones, |
| 1027 | priv->lec_no_forward, |
| 1028 | priv->mcast_fwds |
| 1029 | }; |
| 1030 | void *v = NULL; |
| 1031 | int q; |
| 1032 | |
| 1033 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
| 1034 | v = lec_tbl_walk(state, lec_misc_tables[q], l); |
| 1035 | if (v) |
| 1036 | break; |
| 1037 | } |
| 1038 | state->misc_table = q; |
| 1039 | return v; |
| 1040 | } |
| 1041 | |
| 1042 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
| 1043 | struct lec_priv *priv) |
| 1044 | { |
| 1045 | if (!state->locked) { |
| 1046 | state->locked = priv; |
| 1047 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
| 1048 | } |
| 1049 | if (!lec_arp_walk(state, l, priv) && |
| 1050 | !lec_misc_walk(state, l, priv)) { |
| 1051 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
| 1052 | state->locked = NULL; |
| 1053 | /* Partial state reset for the next time we get called */ |
| 1054 | state->arp_table = state->misc_table = 0; |
| 1055 | } |
| 1056 | return state->locked; |
| 1057 | } |
| 1058 | |
| 1059 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
| 1060 | { |
| 1061 | struct net_device *dev; |
| 1062 | void *v; |
| 1063 | |
| 1064 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
| 1065 | v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; |
| 1066 | if (!v && dev) { |
| 1067 | dev_put(dev); |
| 1068 | /* Partial state reset for the next time we get called */ |
| 1069 | dev = NULL; |
| 1070 | } |
| 1071 | state->dev = dev; |
| 1072 | return v; |
| 1073 | } |
| 1074 | |
| 1075 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
| 1076 | { |
| 1077 | void *v = NULL; |
| 1078 | |
| 1079 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
| 1080 | v = lec_itf_walk(state, &l); |
| 1081 | if (v) |
| 1082 | break; |
| 1083 | } |
| 1084 | return v; |
| 1085 | } |
| 1086 | |
| 1087 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
| 1088 | { |
| 1089 | struct lec_state *state = seq->private; |
| 1090 | |
| 1091 | state->itf = 0; |
| 1092 | state->dev = NULL; |
| 1093 | state->locked = NULL; |
| 1094 | state->arp_table = 0; |
| 1095 | state->misc_table = 0; |
| 1096 | state->entry = (void *)1; |
| 1097 | |
| 1098 | return *pos ? lec_get_idx(state, *pos) : (void*)1; |
| 1099 | } |
| 1100 | |
| 1101 | static void lec_seq_stop(struct seq_file *seq, void *v) |
| 1102 | { |
| 1103 | struct lec_state *state = seq->private; |
| 1104 | |
| 1105 | if (state->dev) { |
| 1106 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, |
| 1107 | state->flags); |
| 1108 | dev_put(state->dev); |
| 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1113 | { |
| 1114 | struct lec_state *state = seq->private; |
| 1115 | |
| 1116 | v = lec_get_idx(state, 1); |
| 1117 | *pos += !!PTR_ERR(v); |
| 1118 | return v; |
| 1119 | } |
| 1120 | |
| 1121 | static int lec_seq_show(struct seq_file *seq, void *v) |
| 1122 | { |
| 1123 | static char lec_banner[] = "Itf MAC ATM destination" |
| 1124 | " Status Flags " |
| 1125 | "VPI/VCI Recv VPI/VCI\n"; |
| 1126 | |
| 1127 | if (v == (void *)1) |
| 1128 | seq_puts(seq, lec_banner); |
| 1129 | else { |
| 1130 | struct lec_state *state = seq->private; |
| 1131 | struct net_device *dev = state->dev; |
| 1132 | |
| 1133 | seq_printf(seq, "%s ", dev->name); |
| 1134 | lec_info(seq, state->entry); |
| 1135 | } |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
| 1139 | static struct seq_operations lec_seq_ops = { |
| 1140 | .start = lec_seq_start, |
| 1141 | .next = lec_seq_next, |
| 1142 | .stop = lec_seq_stop, |
| 1143 | .show = lec_seq_show, |
| 1144 | }; |
| 1145 | |
| 1146 | static int lec_seq_open(struct inode *inode, struct file *file) |
| 1147 | { |
| 1148 | struct lec_state *state; |
| 1149 | struct seq_file *seq; |
| 1150 | int rc = -EAGAIN; |
| 1151 | |
| 1152 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
| 1153 | if (!state) { |
| 1154 | rc = -ENOMEM; |
| 1155 | goto out; |
| 1156 | } |
| 1157 | |
| 1158 | rc = seq_open(file, &lec_seq_ops); |
| 1159 | if (rc) |
| 1160 | goto out_kfree; |
| 1161 | seq = file->private_data; |
| 1162 | seq->private = state; |
| 1163 | out: |
| 1164 | return rc; |
| 1165 | |
| 1166 | out_kfree: |
| 1167 | kfree(state); |
| 1168 | goto out; |
| 1169 | } |
| 1170 | |
| 1171 | static int lec_seq_release(struct inode *inode, struct file *file) |
| 1172 | { |
| 1173 | return seq_release_private(inode, file); |
| 1174 | } |
| 1175 | |
| 1176 | static struct file_operations lec_seq_fops = { |
| 1177 | .owner = THIS_MODULE, |
| 1178 | .open = lec_seq_open, |
| 1179 | .read = seq_read, |
| 1180 | .llseek = seq_lseek, |
| 1181 | .release = lec_seq_release, |
| 1182 | }; |
| 1183 | #endif |
| 1184 | |
| 1185 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1186 | { |
| 1187 | struct atm_vcc *vcc = ATM_SD(sock); |
| 1188 | int err = 0; |
| 1189 | |
| 1190 | switch (cmd) { |
| 1191 | case ATMLEC_CTRL: |
| 1192 | case ATMLEC_MCAST: |
| 1193 | case ATMLEC_DATA: |
| 1194 | if (!capable(CAP_NET_ADMIN)) |
| 1195 | return -EPERM; |
| 1196 | break; |
| 1197 | default: |
| 1198 | return -ENOIOCTLCMD; |
| 1199 | } |
| 1200 | |
| 1201 | switch (cmd) { |
| 1202 | case ATMLEC_CTRL: |
| 1203 | err = lecd_attach(vcc, (int) arg); |
| 1204 | if (err >= 0) |
| 1205 | sock->state = SS_CONNECTED; |
| 1206 | break; |
| 1207 | case ATMLEC_MCAST: |
| 1208 | err = lec_mcast_attach(vcc, (int) arg); |
| 1209 | break; |
| 1210 | case ATMLEC_DATA: |
| 1211 | err = lec_vcc_attach(vcc, (void __user *) arg); |
| 1212 | break; |
| 1213 | } |
| 1214 | |
| 1215 | return err; |
| 1216 | } |
| 1217 | |
| 1218 | static struct atm_ioctl lane_ioctl_ops = { |
| 1219 | .owner = THIS_MODULE, |
| 1220 | .ioctl = lane_ioctl, |
| 1221 | }; |
| 1222 | |
| 1223 | static int __init lane_module_init(void) |
| 1224 | { |
| 1225 | #ifdef CONFIG_PROC_FS |
| 1226 | struct proc_dir_entry *p; |
| 1227 | |
| 1228 | p = create_proc_entry("lec", S_IRUGO, atm_proc_root); |
| 1229 | if (p) |
| 1230 | p->proc_fops = &lec_seq_fops; |
| 1231 | #endif |
| 1232 | |
| 1233 | register_atm_ioctl(&lane_ioctl_ops); |
| 1234 | printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); |
| 1235 | return 0; |
| 1236 | } |
| 1237 | |
| 1238 | static void __exit lane_module_cleanup(void) |
| 1239 | { |
| 1240 | int i; |
| 1241 | struct lec_priv *priv; |
| 1242 | |
| 1243 | remove_proc_entry("lec", atm_proc_root); |
| 1244 | |
| 1245 | deregister_atm_ioctl(&lane_ioctl_ops); |
| 1246 | |
| 1247 | for (i = 0; i < MAX_LEC_ITF; i++) { |
| 1248 | if (dev_lec[i] != NULL) { |
| 1249 | priv = (struct lec_priv *)dev_lec[i]->priv; |
| 1250 | unregister_netdev(dev_lec[i]); |
| 1251 | free_netdev(dev_lec[i]); |
| 1252 | dev_lec[i] = NULL; |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | return; |
| 1257 | } |
| 1258 | |
| 1259 | module_init(lane_module_init); |
| 1260 | module_exit(lane_module_cleanup); |
| 1261 | |
| 1262 | /* |
| 1263 | * LANE2: 3.1.3, LE_RESOLVE.request |
| 1264 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
| 1265 | * If sizeoftlvs == NULL the default TLVs associated with with this |
| 1266 | * lec will be used. |
| 1267 | * If dst_mac == NULL, targetless LE_ARP will be sent |
| 1268 | */ |
| 1269 | static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force, |
| 1270 | u8 **tlvs, u32 *sizeoftlvs) |
| 1271 | { |
| 1272 | unsigned long flags; |
| 1273 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 1274 | struct lec_arp_table *table; |
| 1275 | struct sk_buff *skb; |
| 1276 | int retval; |
| 1277 | |
| 1278 | if (force == 0) { |
| 1279 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1280 | table = lec_arp_find(priv, dst_mac); |
| 1281 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1282 | if(table == NULL) |
| 1283 | return -1; |
| 1284 | |
| 1285 | *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC); |
| 1286 | if (*tlvs == NULL) |
| 1287 | return -1; |
| 1288 | |
| 1289 | memcpy(*tlvs, table->tlvs, table->sizeoftlvs); |
| 1290 | *sizeoftlvs = table->sizeoftlvs; |
| 1291 | |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | if (sizeoftlvs == NULL) |
| 1296 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); |
| 1297 | |
| 1298 | else { |
| 1299 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); |
| 1300 | if (skb == NULL) |
| 1301 | return -1; |
| 1302 | skb->len = *sizeoftlvs; |
| 1303 | memcpy(skb->data, *tlvs, *sizeoftlvs); |
| 1304 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
| 1305 | } |
| 1306 | return retval; |
| 1307 | } |
| 1308 | |
| 1309 | |
| 1310 | /* |
| 1311 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
| 1312 | * Associate the *tlvs with the *lan_dst address. |
| 1313 | * Will overwrite any previous association |
| 1314 | * Returns 1 for success, 0 for failure (out of memory) |
| 1315 | * |
| 1316 | */ |
| 1317 | static int lane2_associate_req (struct net_device *dev, u8 *lan_dst, |
| 1318 | u8 *tlvs, u32 sizeoftlvs) |
| 1319 | { |
| 1320 | int retval; |
| 1321 | struct sk_buff *skb; |
| 1322 | struct lec_priv *priv = (struct lec_priv*)dev->priv; |
| 1323 | |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame^] | 1324 | if (compare_ether_addr(lan_dst, dev->dev_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | return (0); /* not our mac address */ |
| 1326 | |
| 1327 | kfree(priv->tlvs); /* NULL if there was no previous association */ |
| 1328 | |
| 1329 | priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); |
| 1330 | if (priv->tlvs == NULL) |
| 1331 | return (0); |
| 1332 | priv->sizeoftlvs = sizeoftlvs; |
| 1333 | memcpy(priv->tlvs, tlvs, sizeoftlvs); |
| 1334 | |
| 1335 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); |
| 1336 | if (skb == NULL) |
| 1337 | return 0; |
| 1338 | skb->len = sizeoftlvs; |
| 1339 | memcpy(skb->data, tlvs, sizeoftlvs); |
| 1340 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
| 1341 | if (retval != 0) |
| 1342 | printk("lec.c: lane2_associate_req() failed\n"); |
| 1343 | /* If the previous association has changed we must |
| 1344 | * somehow notify other LANE entities about the change |
| 1345 | */ |
| 1346 | return (1); |
| 1347 | } |
| 1348 | |
| 1349 | /* |
| 1350 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
| 1351 | * |
| 1352 | */ |
| 1353 | static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr, |
| 1354 | u8 *tlvs, u32 sizeoftlvs) |
| 1355 | { |
| 1356 | #if 0 |
| 1357 | int i = 0; |
| 1358 | #endif |
| 1359 | struct lec_priv *priv = (struct lec_priv *)dev->priv; |
| 1360 | #if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you |
| 1361 | uncomment this code, make sure the TLVs get freed when entry is killed */ |
| 1362 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
| 1363 | |
| 1364 | if (entry == NULL) |
| 1365 | return; /* should not happen */ |
| 1366 | |
| 1367 | kfree(entry->tlvs); |
| 1368 | |
| 1369 | entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL); |
| 1370 | if (entry->tlvs == NULL) |
| 1371 | return; |
| 1372 | |
| 1373 | entry->sizeoftlvs = sizeoftlvs; |
| 1374 | memcpy(entry->tlvs, tlvs, sizeoftlvs); |
| 1375 | #endif |
| 1376 | #if 0 |
| 1377 | printk("lec.c: lane2_associate_ind()\n"); |
| 1378 | printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); |
| 1379 | while (i < sizeoftlvs) |
| 1380 | printk("%02x ", tlvs[i++]); |
| 1381 | |
| 1382 | printk("\n"); |
| 1383 | #endif |
| 1384 | |
| 1385 | /* tell MPOA about the TLVs we saw */ |
| 1386 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
| 1387 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
| 1388 | tlvs, sizeoftlvs); |
| 1389 | } |
| 1390 | return; |
| 1391 | } |
| 1392 | |
| 1393 | /* |
| 1394 | * Here starts what used to lec_arpc.c |
| 1395 | * |
| 1396 | * lec_arpc.c was added here when making |
| 1397 | * lane client modular. October 1997 |
| 1398 | * |
| 1399 | */ |
| 1400 | |
| 1401 | #include <linux/types.h> |
| 1402 | #include <linux/sched.h> |
| 1403 | #include <linux/timer.h> |
| 1404 | #include <asm/param.h> |
| 1405 | #include <asm/atomic.h> |
| 1406 | #include <linux/inetdevice.h> |
| 1407 | #include <net/route.h> |
| 1408 | |
| 1409 | |
| 1410 | #if 0 |
| 1411 | #define DPRINTK(format,args...) |
| 1412 | /* |
| 1413 | #define DPRINTK printk |
| 1414 | */ |
| 1415 | #endif |
| 1416 | #define DEBUG_ARP_TABLE 0 |
| 1417 | |
| 1418 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
| 1419 | |
| 1420 | static void lec_arp_check_expire(unsigned long data); |
| 1421 | static void lec_arp_expire_arp(unsigned long data); |
| 1422 | |
| 1423 | /* |
| 1424 | * Arp table funcs |
| 1425 | */ |
| 1426 | |
| 1427 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) |
| 1428 | |
| 1429 | /* |
| 1430 | * Initialization of arp-cache |
| 1431 | */ |
| 1432 | static void |
| 1433 | lec_arp_init(struct lec_priv *priv) |
| 1434 | { |
| 1435 | unsigned short i; |
| 1436 | |
| 1437 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1438 | priv->lec_arp_tables[i] = NULL; |
| 1439 | } |
| 1440 | spin_lock_init(&priv->lec_arp_lock); |
| 1441 | init_timer(&priv->lec_arp_timer); |
| 1442 | priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL; |
| 1443 | priv->lec_arp_timer.data = (unsigned long)priv; |
| 1444 | priv->lec_arp_timer.function = lec_arp_check_expire; |
| 1445 | add_timer(&priv->lec_arp_timer); |
| 1446 | } |
| 1447 | |
| 1448 | static void |
| 1449 | lec_arp_clear_vccs(struct lec_arp_table *entry) |
| 1450 | { |
| 1451 | if (entry->vcc) { |
| 1452 | struct atm_vcc *vcc = entry->vcc; |
| 1453 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 1454 | struct net_device *dev = (struct net_device*) vcc->proto_data; |
| 1455 | |
| 1456 | vcc->pop = vpriv->old_pop; |
| 1457 | if (vpriv->xoff) |
| 1458 | netif_wake_queue(dev); |
| 1459 | kfree(vpriv); |
| 1460 | vcc->user_back = NULL; |
| 1461 | vcc->push = entry->old_push; |
| 1462 | vcc_release_async(vcc, -EPIPE); |
| 1463 | vcc = NULL; |
| 1464 | } |
| 1465 | if (entry->recv_vcc) { |
| 1466 | entry->recv_vcc->push = entry->old_recv_push; |
| 1467 | vcc_release_async(entry->recv_vcc, -EPIPE); |
| 1468 | entry->recv_vcc = NULL; |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | /* |
| 1473 | * Insert entry to lec_arp_table |
| 1474 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
| 1475 | */ |
| 1476 | static inline void |
| 1477 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add) |
| 1478 | { |
| 1479 | unsigned short place; |
| 1480 | struct lec_arp_table *tmp; |
| 1481 | |
| 1482 | place = HASH(to_add->mac_addr[ETH_ALEN-1]); |
| 1483 | tmp = priv->lec_arp_tables[place]; |
| 1484 | to_add->next = NULL; |
| 1485 | if (tmp == NULL) |
| 1486 | priv->lec_arp_tables[place] = to_add; |
| 1487 | |
| 1488 | else { /* add to the end */ |
| 1489 | while (tmp->next) |
| 1490 | tmp = tmp->next; |
| 1491 | tmp->next = to_add; |
| 1492 | } |
| 1493 | |
| 1494 | DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
| 1495 | 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1], |
| 1496 | 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3], |
| 1497 | 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]); |
| 1498 | } |
| 1499 | |
| 1500 | /* |
| 1501 | * Remove entry from lec_arp_table |
| 1502 | */ |
| 1503 | static int |
| 1504 | lec_arp_remove(struct lec_priv *priv, |
| 1505 | struct lec_arp_table *to_remove) |
| 1506 | { |
| 1507 | unsigned short place; |
| 1508 | struct lec_arp_table *tmp; |
| 1509 | int remove_vcc=1; |
| 1510 | |
| 1511 | if (!to_remove) { |
| 1512 | return -1; |
| 1513 | } |
| 1514 | place = HASH(to_remove->mac_addr[ETH_ALEN-1]); |
| 1515 | tmp = priv->lec_arp_tables[place]; |
| 1516 | if (tmp == to_remove) { |
| 1517 | priv->lec_arp_tables[place] = tmp->next; |
| 1518 | } else { |
| 1519 | while(tmp && tmp->next != to_remove) { |
| 1520 | tmp = tmp->next; |
| 1521 | } |
| 1522 | if (!tmp) {/* Entry was not found */ |
| 1523 | return -1; |
| 1524 | } |
| 1525 | } |
| 1526 | tmp->next = to_remove->next; |
| 1527 | del_timer(&to_remove->timer); |
| 1528 | |
| 1529 | /* If this is the only MAC connected to this VCC, also tear down |
| 1530 | the VCC */ |
| 1531 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
| 1532 | /* |
| 1533 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
| 1534 | */ |
| 1535 | for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) { |
| 1536 | for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) { |
| 1537 | if (memcmp(tmp->atm_addr, to_remove->atm_addr, |
| 1538 | ATM_ESA_LEN)==0) { |
| 1539 | remove_vcc=0; |
| 1540 | break; |
| 1541 | } |
| 1542 | } |
| 1543 | } |
| 1544 | if (remove_vcc) |
| 1545 | lec_arp_clear_vccs(to_remove); |
| 1546 | } |
| 1547 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ |
| 1548 | |
| 1549 | DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
| 1550 | 0xff&to_remove->mac_addr[0], 0xff&to_remove->mac_addr[1], |
| 1551 | 0xff&to_remove->mac_addr[2], 0xff&to_remove->mac_addr[3], |
| 1552 | 0xff&to_remove->mac_addr[4], 0xff&to_remove->mac_addr[5]); |
| 1553 | return 0; |
| 1554 | } |
| 1555 | |
| 1556 | #if DEBUG_ARP_TABLE |
| 1557 | static char* |
| 1558 | get_status_string(unsigned char st) |
| 1559 | { |
| 1560 | switch(st) { |
| 1561 | case ESI_UNKNOWN: |
| 1562 | return "ESI_UNKNOWN"; |
| 1563 | case ESI_ARP_PENDING: |
| 1564 | return "ESI_ARP_PENDING"; |
| 1565 | case ESI_VC_PENDING: |
| 1566 | return "ESI_VC_PENDING"; |
| 1567 | case ESI_FLUSH_PENDING: |
| 1568 | return "ESI_FLUSH_PENDING"; |
| 1569 | case ESI_FORWARD_DIRECT: |
| 1570 | return "ESI_FORWARD_DIRECT"; |
| 1571 | default: |
| 1572 | return "<UNKNOWN>"; |
| 1573 | } |
| 1574 | } |
| 1575 | #endif |
| 1576 | |
| 1577 | static void |
| 1578 | dump_arp_table(struct lec_priv *priv) |
| 1579 | { |
| 1580 | #if DEBUG_ARP_TABLE |
| 1581 | int i,j, offset; |
| 1582 | struct lec_arp_table *rulla; |
| 1583 | char buf[1024]; |
| 1584 | struct lec_arp_table **lec_arp_tables = |
| 1585 | (struct lec_arp_table **)priv->lec_arp_tables; |
| 1586 | struct lec_arp_table *lec_arp_empty_ones = |
| 1587 | (struct lec_arp_table *)priv->lec_arp_empty_ones; |
| 1588 | struct lec_arp_table *lec_no_forward = |
| 1589 | (struct lec_arp_table *)priv->lec_no_forward; |
| 1590 | struct lec_arp_table *mcast_fwds = priv->mcast_fwds; |
| 1591 | |
| 1592 | |
| 1593 | printk("Dump %p:\n",priv); |
| 1594 | for (i=0;i<LEC_ARP_TABLE_SIZE;i++) { |
| 1595 | rulla = lec_arp_tables[i]; |
| 1596 | offset = 0; |
| 1597 | offset += sprintf(buf,"%d: %p\n",i, rulla); |
| 1598 | while (rulla) { |
| 1599 | offset += sprintf(buf+offset,"Mac:"); |
| 1600 | for(j=0;j<ETH_ALEN;j++) { |
| 1601 | offset+=sprintf(buf+offset, |
| 1602 | "%2.2x ", |
| 1603 | rulla->mac_addr[j]&0xff); |
| 1604 | } |
| 1605 | offset +=sprintf(buf+offset,"Atm:"); |
| 1606 | for(j=0;j<ATM_ESA_LEN;j++) { |
| 1607 | offset+=sprintf(buf+offset, |
| 1608 | "%2.2x ", |
| 1609 | rulla->atm_addr[j]&0xff); |
| 1610 | } |
| 1611 | offset+=sprintf(buf+offset, |
| 1612 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1613 | rulla->vcc?rulla->vcc->vpi:0, |
| 1614 | rulla->vcc?rulla->vcc->vci:0, |
| 1615 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
| 1616 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
| 1617 | rulla->last_used, |
| 1618 | rulla->timestamp, rulla->no_tries); |
| 1619 | offset+=sprintf(buf+offset, |
| 1620 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1621 | rulla->flags, rulla->packets_flooded, |
| 1622 | get_status_string(rulla->status)); |
| 1623 | offset+=sprintf(buf+offset,"->%p\n",rulla->next); |
| 1624 | rulla = rulla->next; |
| 1625 | } |
| 1626 | printk("%s",buf); |
| 1627 | } |
| 1628 | rulla = lec_no_forward; |
| 1629 | if (rulla) |
| 1630 | printk("No forward\n"); |
| 1631 | while(rulla) { |
| 1632 | offset=0; |
| 1633 | offset += sprintf(buf+offset,"Mac:"); |
| 1634 | for(j=0;j<ETH_ALEN;j++) { |
| 1635 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1636 | rulla->mac_addr[j]&0xff); |
| 1637 | } |
| 1638 | offset +=sprintf(buf+offset,"Atm:"); |
| 1639 | for(j=0;j<ATM_ESA_LEN;j++) { |
| 1640 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1641 | rulla->atm_addr[j]&0xff); |
| 1642 | } |
| 1643 | offset+=sprintf(buf+offset, |
| 1644 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1645 | rulla->vcc?rulla->vcc->vpi:0, |
| 1646 | rulla->vcc?rulla->vcc->vci:0, |
| 1647 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
| 1648 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
| 1649 | rulla->last_used, |
| 1650 | rulla->timestamp, rulla->no_tries); |
| 1651 | offset+=sprintf(buf+offset, |
| 1652 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1653 | rulla->flags, rulla->packets_flooded, |
| 1654 | get_status_string(rulla->status)); |
| 1655 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
| 1656 | rulla = rulla->next; |
| 1657 | printk("%s",buf); |
| 1658 | } |
| 1659 | rulla = lec_arp_empty_ones; |
| 1660 | if (rulla) |
| 1661 | printk("Empty ones\n"); |
| 1662 | while(rulla) { |
| 1663 | offset=0; |
| 1664 | offset += sprintf(buf+offset,"Mac:"); |
| 1665 | for(j=0;j<ETH_ALEN;j++) { |
| 1666 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1667 | rulla->mac_addr[j]&0xff); |
| 1668 | } |
| 1669 | offset +=sprintf(buf+offset,"Atm:"); |
| 1670 | for(j=0;j<ATM_ESA_LEN;j++) { |
| 1671 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1672 | rulla->atm_addr[j]&0xff); |
| 1673 | } |
| 1674 | offset+=sprintf(buf+offset, |
| 1675 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1676 | rulla->vcc?rulla->vcc->vpi:0, |
| 1677 | rulla->vcc?rulla->vcc->vci:0, |
| 1678 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
| 1679 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
| 1680 | rulla->last_used, |
| 1681 | rulla->timestamp, rulla->no_tries); |
| 1682 | offset+=sprintf(buf+offset, |
| 1683 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1684 | rulla->flags, rulla->packets_flooded, |
| 1685 | get_status_string(rulla->status)); |
| 1686 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
| 1687 | rulla = rulla->next; |
| 1688 | printk("%s",buf); |
| 1689 | } |
| 1690 | |
| 1691 | rulla = mcast_fwds; |
| 1692 | if (rulla) |
| 1693 | printk("Multicast Forward VCCs\n"); |
| 1694 | while(rulla) { |
| 1695 | offset=0; |
| 1696 | offset += sprintf(buf+offset,"Mac:"); |
| 1697 | for(j=0;j<ETH_ALEN;j++) { |
| 1698 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1699 | rulla->mac_addr[j]&0xff); |
| 1700 | } |
| 1701 | offset +=sprintf(buf+offset,"Atm:"); |
| 1702 | for(j=0;j<ATM_ESA_LEN;j++) { |
| 1703 | offset+=sprintf(buf+offset,"%2.2x ", |
| 1704 | rulla->atm_addr[j]&0xff); |
| 1705 | } |
| 1706 | offset+=sprintf(buf+offset, |
| 1707 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1708 | rulla->vcc?rulla->vcc->vpi:0, |
| 1709 | rulla->vcc?rulla->vcc->vci:0, |
| 1710 | rulla->recv_vcc?rulla->recv_vcc->vpi:0, |
| 1711 | rulla->recv_vcc?rulla->recv_vcc->vci:0, |
| 1712 | rulla->last_used, |
| 1713 | rulla->timestamp, rulla->no_tries); |
| 1714 | offset+=sprintf(buf+offset, |
| 1715 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1716 | rulla->flags, rulla->packets_flooded, |
| 1717 | get_status_string(rulla->status)); |
| 1718 | offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next); |
| 1719 | rulla = rulla->next; |
| 1720 | printk("%s",buf); |
| 1721 | } |
| 1722 | |
| 1723 | #endif |
| 1724 | } |
| 1725 | |
| 1726 | /* |
| 1727 | * Destruction of arp-cache |
| 1728 | */ |
| 1729 | static void |
| 1730 | lec_arp_destroy(struct lec_priv *priv) |
| 1731 | { |
| 1732 | unsigned long flags; |
| 1733 | struct lec_arp_table *entry, *next; |
| 1734 | int i; |
| 1735 | |
| 1736 | del_timer_sync(&priv->lec_arp_timer); |
| 1737 | |
| 1738 | /* |
| 1739 | * Remove all entries |
| 1740 | */ |
| 1741 | |
| 1742 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1743 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1744 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) { |
| 1745 | next = entry->next; |
| 1746 | lec_arp_remove(priv, entry); |
| 1747 | kfree(entry); |
| 1748 | } |
| 1749 | } |
| 1750 | entry = priv->lec_arp_empty_ones; |
| 1751 | while(entry) { |
| 1752 | next = entry->next; |
| 1753 | del_timer_sync(&entry->timer); |
| 1754 | lec_arp_clear_vccs(entry); |
| 1755 | kfree(entry); |
| 1756 | entry = next; |
| 1757 | } |
| 1758 | priv->lec_arp_empty_ones = NULL; |
| 1759 | entry = priv->lec_no_forward; |
| 1760 | while(entry) { |
| 1761 | next = entry->next; |
| 1762 | del_timer_sync(&entry->timer); |
| 1763 | lec_arp_clear_vccs(entry); |
| 1764 | kfree(entry); |
| 1765 | entry = next; |
| 1766 | } |
| 1767 | priv->lec_no_forward = NULL; |
| 1768 | entry = priv->mcast_fwds; |
| 1769 | while(entry) { |
| 1770 | next = entry->next; |
| 1771 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 1772 | lec_arp_clear_vccs(entry); |
| 1773 | kfree(entry); |
| 1774 | entry = next; |
| 1775 | } |
| 1776 | priv->mcast_fwds = NULL; |
| 1777 | priv->mcast_vcc = NULL; |
| 1778 | memset(priv->lec_arp_tables, 0, |
| 1779 | sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE); |
| 1780 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1781 | } |
| 1782 | |
| 1783 | |
| 1784 | /* |
| 1785 | * Find entry by mac_address |
| 1786 | */ |
| 1787 | static struct lec_arp_table* |
| 1788 | lec_arp_find(struct lec_priv *priv, |
| 1789 | unsigned char *mac_addr) |
| 1790 | { |
| 1791 | unsigned short place; |
| 1792 | struct lec_arp_table *to_return; |
| 1793 | |
| 1794 | DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", |
| 1795 | mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff, |
| 1796 | mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff); |
| 1797 | place = HASH(mac_addr[ETH_ALEN-1]); |
| 1798 | |
| 1799 | to_return = priv->lec_arp_tables[place]; |
| 1800 | while(to_return) { |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame^] | 1801 | if (!compare_ether_addr(mac_addr, to_return->mac_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | return to_return; |
| 1803 | } |
| 1804 | to_return = to_return->next; |
| 1805 | } |
| 1806 | return NULL; |
| 1807 | } |
| 1808 | |
| 1809 | static struct lec_arp_table* |
| 1810 | make_entry(struct lec_priv *priv, unsigned char *mac_addr) |
| 1811 | { |
| 1812 | struct lec_arp_table *to_return; |
| 1813 | |
| 1814 | to_return = (struct lec_arp_table *) kmalloc(sizeof(struct lec_arp_table), |
| 1815 | GFP_ATOMIC); |
| 1816 | if (!to_return) { |
| 1817 | printk("LEC: Arp entry kmalloc failed\n"); |
| 1818 | return NULL; |
| 1819 | } |
| 1820 | memset(to_return, 0, sizeof(struct lec_arp_table)); |
| 1821 | memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); |
| 1822 | init_timer(&to_return->timer); |
| 1823 | to_return->timer.function = lec_arp_expire_arp; |
| 1824 | to_return->timer.data = (unsigned long) to_return; |
| 1825 | to_return->last_used = jiffies; |
| 1826 | to_return->priv = priv; |
| 1827 | skb_queue_head_init(&to_return->tx_wait); |
| 1828 | return to_return; |
| 1829 | } |
| 1830 | |
| 1831 | /* |
| 1832 | * |
| 1833 | * Arp sent timer expired |
| 1834 | * |
| 1835 | */ |
| 1836 | static void |
| 1837 | lec_arp_expire_arp(unsigned long data) |
| 1838 | { |
| 1839 | struct lec_arp_table *entry; |
| 1840 | |
| 1841 | entry = (struct lec_arp_table *)data; |
| 1842 | |
| 1843 | DPRINTK("lec_arp_expire_arp\n"); |
| 1844 | if (entry->status == ESI_ARP_PENDING) { |
| 1845 | if (entry->no_tries <= entry->priv->max_retry_count) { |
| 1846 | if (entry->is_rdesc) |
| 1847 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL); |
| 1848 | else |
| 1849 | send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL); |
| 1850 | entry->no_tries++; |
| 1851 | } |
| 1852 | mod_timer(&entry->timer, jiffies + (1*HZ)); |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | /* |
| 1857 | * |
| 1858 | * Unknown/unused vcc expire, remove associated entry |
| 1859 | * |
| 1860 | */ |
| 1861 | static void |
| 1862 | lec_arp_expire_vcc(unsigned long data) |
| 1863 | { |
| 1864 | unsigned long flags; |
| 1865 | struct lec_arp_table *to_remove = (struct lec_arp_table*)data; |
| 1866 | struct lec_priv *priv = (struct lec_priv *)to_remove->priv; |
| 1867 | struct lec_arp_table *entry = NULL; |
| 1868 | |
| 1869 | del_timer(&to_remove->timer); |
| 1870 | |
| 1871 | DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", |
| 1872 | to_remove, priv, |
| 1873 | to_remove->vcc?to_remove->recv_vcc->vpi:0, |
| 1874 | to_remove->vcc?to_remove->recv_vcc->vci:0); |
| 1875 | DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward); |
| 1876 | |
| 1877 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1878 | if (to_remove == priv->lec_arp_empty_ones) |
| 1879 | priv->lec_arp_empty_ones = to_remove->next; |
| 1880 | else { |
| 1881 | entry = priv->lec_arp_empty_ones; |
| 1882 | while (entry && entry->next != to_remove) |
| 1883 | entry = entry->next; |
| 1884 | if (entry) |
| 1885 | entry->next = to_remove->next; |
| 1886 | } |
| 1887 | if (!entry) { |
| 1888 | if (to_remove == priv->lec_no_forward) { |
| 1889 | priv->lec_no_forward = to_remove->next; |
| 1890 | } else { |
| 1891 | entry = priv->lec_no_forward; |
| 1892 | while (entry && entry->next != to_remove) |
| 1893 | entry = entry->next; |
| 1894 | if (entry) |
| 1895 | entry->next = to_remove->next; |
| 1896 | } |
| 1897 | } |
| 1898 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1899 | |
| 1900 | lec_arp_clear_vccs(to_remove); |
| 1901 | kfree(to_remove); |
| 1902 | } |
| 1903 | |
| 1904 | /* |
| 1905 | * Expire entries. |
| 1906 | * 1. Re-set timer |
| 1907 | * 2. For each entry, delete entries that have aged past the age limit. |
| 1908 | * 3. For each entry, depending on the status of the entry, perform |
| 1909 | * the following maintenance. |
| 1910 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
| 1911 | * tick_count is above the max_unknown_frame_time, clear |
| 1912 | * the tick_count to zero and clear the packets_flooded counter |
| 1913 | * to zero. This supports the packet rate limit per address |
| 1914 | * while flooding unknowns. |
| 1915 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
| 1916 | * than or equal to the path_switching_delay, change the status |
| 1917 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
| 1918 | * regardless of the progress of the flush protocol. |
| 1919 | */ |
| 1920 | static void |
| 1921 | lec_arp_check_expire(unsigned long data) |
| 1922 | { |
| 1923 | unsigned long flags; |
| 1924 | struct lec_priv *priv = (struct lec_priv *)data; |
| 1925 | struct lec_arp_table *entry, *next; |
| 1926 | unsigned long now; |
| 1927 | unsigned long time_to_check; |
| 1928 | int i; |
| 1929 | |
| 1930 | DPRINTK("lec_arp_check_expire %p\n",priv); |
| 1931 | DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones, |
| 1932 | priv->lec_no_forward); |
| 1933 | now = jiffies; |
| 1934 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1935 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1936 | for(entry = priv->lec_arp_tables[i]; entry != NULL; ) { |
| 1937 | if ((entry->flags) & LEC_REMOTE_FLAG && |
| 1938 | priv->topology_change) |
| 1939 | time_to_check = priv->forward_delay_time; |
| 1940 | else |
| 1941 | time_to_check = priv->aging_time; |
| 1942 | |
| 1943 | DPRINTK("About to expire: %lx - %lx > %lx\n", |
| 1944 | now,entry->last_used, time_to_check); |
| 1945 | if( time_after(now, entry->last_used+ |
| 1946 | time_to_check) && |
| 1947 | !(entry->flags & LEC_PERMANENT_FLAG) && |
| 1948 | !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */ |
| 1949 | /* Remove entry */ |
| 1950 | DPRINTK("LEC:Entry timed out\n"); |
| 1951 | next = entry->next; |
| 1952 | lec_arp_remove(priv, entry); |
| 1953 | kfree(entry); |
| 1954 | entry = next; |
| 1955 | } else { |
| 1956 | /* Something else */ |
| 1957 | if ((entry->status == ESI_VC_PENDING || |
| 1958 | entry->status == ESI_ARP_PENDING) |
| 1959 | && time_after_eq(now, |
| 1960 | entry->timestamp + |
| 1961 | priv->max_unknown_frame_time)) { |
| 1962 | entry->timestamp = jiffies; |
| 1963 | entry->packets_flooded = 0; |
| 1964 | if (entry->status == ESI_VC_PENDING) |
| 1965 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL); |
| 1966 | } |
| 1967 | if (entry->status == ESI_FLUSH_PENDING |
| 1968 | && |
| 1969 | time_after_eq(now, entry->timestamp+ |
| 1970 | priv->path_switching_delay)) { |
| 1971 | struct sk_buff *skb; |
| 1972 | |
| 1973 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) |
| 1974 | lec_send(entry->vcc, skb, entry->priv); |
| 1975 | entry->last_used = jiffies; |
| 1976 | entry->status = |
| 1977 | ESI_FORWARD_DIRECT; |
| 1978 | } |
| 1979 | entry = entry->next; |
| 1980 | } |
| 1981 | } |
| 1982 | } |
| 1983 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1984 | |
| 1985 | mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL); |
| 1986 | } |
| 1987 | /* |
| 1988 | * Try to find vcc where mac_address is attached. |
| 1989 | * |
| 1990 | */ |
| 1991 | static struct atm_vcc* |
| 1992 | lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find, |
| 1993 | int is_rdesc, struct lec_arp_table **ret_entry) |
| 1994 | { |
| 1995 | unsigned long flags; |
| 1996 | struct lec_arp_table *entry; |
| 1997 | struct atm_vcc *found; |
| 1998 | |
| 1999 | if (mac_to_find[0] & 0x01) { |
| 2000 | switch (priv->lane_version) { |
| 2001 | case 1: |
| 2002 | return priv->mcast_vcc; |
| 2003 | break; |
| 2004 | case 2: /* LANE2 wants arp for multicast addresses */ |
Kris Katterjohn | d3f4a68 | 2006-01-09 16:01:43 -0800 | [diff] [blame^] | 2005 | if (!compare_ether_addr(mac_to_find, bus_mac)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | return priv->mcast_vcc; |
| 2007 | break; |
| 2008 | default: |
| 2009 | break; |
| 2010 | } |
| 2011 | } |
| 2012 | |
| 2013 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2014 | entry = lec_arp_find(priv, mac_to_find); |
| 2015 | |
| 2016 | if (entry) { |
| 2017 | if (entry->status == ESI_FORWARD_DIRECT) { |
| 2018 | /* Connection Ok */ |
| 2019 | entry->last_used = jiffies; |
| 2020 | *ret_entry = entry; |
| 2021 | found = entry->vcc; |
| 2022 | goto out; |
| 2023 | } |
Scott Talbert | 75b895c | 2005-09-29 17:31:30 -0700 | [diff] [blame] | 2024 | /* If the LE_ARP cache entry is still pending, reset count to 0 |
| 2025 | * so another LE_ARP request can be made for this frame. |
| 2026 | */ |
| 2027 | if (entry->status == ESI_ARP_PENDING) { |
| 2028 | entry->no_tries = 0; |
| 2029 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | /* Data direct VC not yet set up, check to see if the unknown |
| 2031 | frame count is greater than the limit. If the limit has |
| 2032 | not been reached, allow the caller to send packet to |
| 2033 | BUS. */ |
| 2034 | if (entry->status != ESI_FLUSH_PENDING && |
| 2035 | entry->packets_flooded<priv->maximum_unknown_frame_count) { |
| 2036 | entry->packets_flooded++; |
| 2037 | DPRINTK("LEC_ARP: Flooding..\n"); |
| 2038 | found = priv->mcast_vcc; |
| 2039 | goto out; |
| 2040 | } |
| 2041 | /* We got here because entry->status == ESI_FLUSH_PENDING |
| 2042 | * or BUS flood limit was reached for an entry which is |
| 2043 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
| 2044 | */ |
| 2045 | *ret_entry = entry; |
| 2046 | DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc); |
| 2047 | found = NULL; |
| 2048 | } else { |
| 2049 | /* No matching entry was found */ |
| 2050 | entry = make_entry(priv, mac_to_find); |
| 2051 | DPRINTK("LEC_ARP: Making entry\n"); |
| 2052 | if (!entry) { |
| 2053 | found = priv->mcast_vcc; |
| 2054 | goto out; |
| 2055 | } |
| 2056 | lec_arp_add(priv, entry); |
| 2057 | /* We want arp-request(s) to be sent */ |
| 2058 | entry->packets_flooded =1; |
| 2059 | entry->status = ESI_ARP_PENDING; |
| 2060 | entry->no_tries = 1; |
| 2061 | entry->last_used = entry->timestamp = jiffies; |
| 2062 | entry->is_rdesc = is_rdesc; |
| 2063 | if (entry->is_rdesc) |
| 2064 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL); |
| 2065 | else |
| 2066 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); |
| 2067 | entry->timer.expires = jiffies + (1*HZ); |
| 2068 | entry->timer.function = lec_arp_expire_arp; |
| 2069 | add_timer(&entry->timer); |
| 2070 | found = priv->mcast_vcc; |
| 2071 | } |
| 2072 | |
| 2073 | out: |
| 2074 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2075 | return found; |
| 2076 | } |
| 2077 | |
| 2078 | static int |
| 2079 | lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr, |
| 2080 | unsigned long permanent) |
| 2081 | { |
| 2082 | unsigned long flags; |
| 2083 | struct lec_arp_table *entry, *next; |
| 2084 | int i; |
| 2085 | |
| 2086 | DPRINTK("lec_addr_delete\n"); |
| 2087 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2088 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2089 | for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) { |
| 2090 | next = entry->next; |
| 2091 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) |
| 2092 | && (permanent || |
| 2093 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
| 2094 | lec_arp_remove(priv, entry); |
| 2095 | kfree(entry); |
| 2096 | } |
| 2097 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2098 | return 0; |
| 2099 | } |
| 2100 | } |
| 2101 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2102 | return -1; |
| 2103 | } |
| 2104 | |
| 2105 | /* |
| 2106 | * Notifies: Response to arp_request (atm_addr != NULL) |
| 2107 | */ |
| 2108 | static void |
| 2109 | lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr, |
| 2110 | unsigned char *atm_addr, unsigned long remoteflag, |
| 2111 | unsigned int targetless_le_arp) |
| 2112 | { |
| 2113 | unsigned long flags; |
| 2114 | struct lec_arp_table *entry, *tmp; |
| 2115 | int i; |
| 2116 | |
| 2117 | DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " "); |
| 2118 | DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
| 2119 | mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3], |
| 2120 | mac_addr[4],mac_addr[5]); |
| 2121 | |
| 2122 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2123 | entry = lec_arp_find(priv, mac_addr); |
| 2124 | if (entry == NULL && targetless_le_arp) |
| 2125 | goto out; /* LANE2: ignore targetless LE_ARPs for which |
| 2126 | * we have no entry in the cache. 7.1.30 |
| 2127 | */ |
| 2128 | if (priv->lec_arp_empty_ones) { |
| 2129 | entry = priv->lec_arp_empty_ones; |
| 2130 | if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) { |
| 2131 | priv->lec_arp_empty_ones = entry->next; |
| 2132 | } else { |
| 2133 | while(entry->next && memcmp(entry->next->atm_addr, |
| 2134 | atm_addr, ATM_ESA_LEN)) |
| 2135 | entry = entry->next; |
| 2136 | if (entry->next) { |
| 2137 | tmp = entry; |
| 2138 | entry = entry->next; |
| 2139 | tmp->next = entry->next; |
| 2140 | } else |
| 2141 | entry = NULL; |
| 2142 | |
| 2143 | } |
| 2144 | if (entry) { |
| 2145 | del_timer(&entry->timer); |
| 2146 | tmp = lec_arp_find(priv, mac_addr); |
| 2147 | if (tmp) { |
| 2148 | del_timer(&tmp->timer); |
| 2149 | tmp->status = ESI_FORWARD_DIRECT; |
| 2150 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
| 2151 | tmp->vcc = entry->vcc; |
| 2152 | tmp->old_push = entry->old_push; |
| 2153 | tmp->last_used = jiffies; |
| 2154 | del_timer(&entry->timer); |
| 2155 | kfree(entry); |
| 2156 | entry=tmp; |
| 2157 | } else { |
| 2158 | entry->status = ESI_FORWARD_DIRECT; |
| 2159 | memcpy(entry->mac_addr, mac_addr, ETH_ALEN); |
| 2160 | entry->last_used = jiffies; |
| 2161 | lec_arp_add(priv, entry); |
| 2162 | } |
| 2163 | if (remoteflag) |
| 2164 | entry->flags|=LEC_REMOTE_FLAG; |
| 2165 | else |
| 2166 | entry->flags&=~LEC_REMOTE_FLAG; |
| 2167 | DPRINTK("After update\n"); |
| 2168 | dump_arp_table(priv); |
| 2169 | goto out; |
| 2170 | } |
| 2171 | } |
| 2172 | entry = lec_arp_find(priv, mac_addr); |
| 2173 | if (!entry) { |
| 2174 | entry = make_entry(priv, mac_addr); |
| 2175 | if (!entry) |
| 2176 | goto out; |
| 2177 | entry->status = ESI_UNKNOWN; |
| 2178 | lec_arp_add(priv, entry); |
| 2179 | /* Temporary, changes before end of function */ |
| 2180 | } |
| 2181 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
| 2182 | del_timer(&entry->timer); |
| 2183 | for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2184 | for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) { |
| 2185 | if (entry != tmp && |
| 2186 | !memcmp(tmp->atm_addr, atm_addr, |
| 2187 | ATM_ESA_LEN)) { |
| 2188 | /* Vcc to this host exists */ |
| 2189 | if (tmp->status > ESI_VC_PENDING) { |
| 2190 | /* |
| 2191 | * ESI_FLUSH_PENDING, |
| 2192 | * ESI_FORWARD_DIRECT |
| 2193 | */ |
| 2194 | entry->vcc = tmp->vcc; |
| 2195 | entry->old_push=tmp->old_push; |
| 2196 | } |
| 2197 | entry->status=tmp->status; |
| 2198 | break; |
| 2199 | } |
| 2200 | } |
| 2201 | } |
| 2202 | if (remoteflag) |
| 2203 | entry->flags|=LEC_REMOTE_FLAG; |
| 2204 | else |
| 2205 | entry->flags&=~LEC_REMOTE_FLAG; |
| 2206 | if (entry->status == ESI_ARP_PENDING || |
| 2207 | entry->status == ESI_UNKNOWN) { |
| 2208 | entry->status = ESI_VC_PENDING; |
| 2209 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
| 2210 | } |
| 2211 | DPRINTK("After update2\n"); |
| 2212 | dump_arp_table(priv); |
| 2213 | out: |
| 2214 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2215 | } |
| 2216 | |
| 2217 | /* |
| 2218 | * Notifies: Vcc setup ready |
| 2219 | */ |
| 2220 | static void |
| 2221 | lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data, |
| 2222 | struct atm_vcc *vcc, |
| 2223 | void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb)) |
| 2224 | { |
| 2225 | unsigned long flags; |
| 2226 | struct lec_arp_table *entry; |
| 2227 | int i, found_entry=0; |
| 2228 | |
| 2229 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2230 | if (ioc_data->receive == 2) { |
| 2231 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 2232 | |
| 2233 | DPRINTK("LEC_ARP: Attaching mcast forward\n"); |
| 2234 | #if 0 |
| 2235 | entry = lec_arp_find(priv, bus_mac); |
| 2236 | if (!entry) { |
| 2237 | printk("LEC_ARP: Multicast entry not found!\n"); |
| 2238 | goto out; |
| 2239 | } |
| 2240 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2241 | entry->recv_vcc = vcc; |
| 2242 | entry->old_recv_push = old_push; |
| 2243 | #endif |
| 2244 | entry = make_entry(priv, bus_mac); |
| 2245 | if (entry == NULL) |
| 2246 | goto out; |
| 2247 | del_timer(&entry->timer); |
| 2248 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2249 | entry->recv_vcc = vcc; |
| 2250 | entry->old_recv_push = old_push; |
| 2251 | entry->next = priv->mcast_fwds; |
| 2252 | priv->mcast_fwds = entry; |
| 2253 | goto out; |
| 2254 | } else if (ioc_data->receive == 1) { |
| 2255 | /* Vcc which we don't want to make default vcc, attach it |
| 2256 | anyway. */ |
| 2257 | DPRINTK("LEC_ARP:Attaching data direct, not default :%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
| 2258 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], |
| 2259 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], |
| 2260 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], |
| 2261 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], |
| 2262 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], |
| 2263 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], |
| 2264 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], |
| 2265 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], |
| 2266 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], |
| 2267 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); |
| 2268 | entry = make_entry(priv, bus_mac); |
| 2269 | if (entry == NULL) |
| 2270 | goto out; |
| 2271 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2272 | memset(entry->mac_addr, 0, ETH_ALEN); |
| 2273 | entry->recv_vcc = vcc; |
| 2274 | entry->old_recv_push = old_push; |
| 2275 | entry->status = ESI_UNKNOWN; |
| 2276 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
| 2277 | entry->timer.function = lec_arp_expire_vcc; |
| 2278 | add_timer(&entry->timer); |
| 2279 | entry->next = priv->lec_no_forward; |
| 2280 | priv->lec_no_forward = entry; |
| 2281 | dump_arp_table(priv); |
| 2282 | goto out; |
| 2283 | } |
| 2284 | DPRINTK("LEC_ARP:Attaching data direct, default:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", |
| 2285 | ioc_data->atm_addr[0],ioc_data->atm_addr[1], |
| 2286 | ioc_data->atm_addr[2],ioc_data->atm_addr[3], |
| 2287 | ioc_data->atm_addr[4],ioc_data->atm_addr[5], |
| 2288 | ioc_data->atm_addr[6],ioc_data->atm_addr[7], |
| 2289 | ioc_data->atm_addr[8],ioc_data->atm_addr[9], |
| 2290 | ioc_data->atm_addr[10],ioc_data->atm_addr[11], |
| 2291 | ioc_data->atm_addr[12],ioc_data->atm_addr[13], |
| 2292 | ioc_data->atm_addr[14],ioc_data->atm_addr[15], |
| 2293 | ioc_data->atm_addr[16],ioc_data->atm_addr[17], |
| 2294 | ioc_data->atm_addr[18],ioc_data->atm_addr[19]); |
| 2295 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2296 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { |
| 2297 | if (memcmp(ioc_data->atm_addr, entry->atm_addr, |
| 2298 | ATM_ESA_LEN)==0) { |
| 2299 | DPRINTK("LEC_ARP: Attaching data direct\n"); |
| 2300 | DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n", |
| 2301 | entry->vcc?entry->vcc->vci:0, |
| 2302 | entry->recv_vcc?entry->recv_vcc->vci:0); |
| 2303 | found_entry=1; |
| 2304 | del_timer(&entry->timer); |
| 2305 | entry->vcc = vcc; |
| 2306 | entry->old_push = old_push; |
| 2307 | if (entry->status == ESI_VC_PENDING) { |
| 2308 | if(priv->maximum_unknown_frame_count |
| 2309 | ==0) |
| 2310 | entry->status = |
| 2311 | ESI_FORWARD_DIRECT; |
| 2312 | else { |
| 2313 | entry->timestamp = jiffies; |
| 2314 | entry->status = |
| 2315 | ESI_FLUSH_PENDING; |
| 2316 | #if 0 |
| 2317 | send_to_lecd(priv,l_flush_xmt, |
| 2318 | NULL, |
| 2319 | entry->atm_addr, |
| 2320 | NULL); |
| 2321 | #endif |
| 2322 | } |
| 2323 | } else { |
| 2324 | /* They were forming a connection |
| 2325 | to us, and we to them. Our |
| 2326 | ATM address is numerically lower |
| 2327 | than theirs, so we make connection |
| 2328 | we formed into default VCC (8.1.11). |
| 2329 | Connection they made gets torn |
| 2330 | down. This might confuse some |
| 2331 | clients. Can be changed if |
| 2332 | someone reports trouble... */ |
| 2333 | ; |
| 2334 | } |
| 2335 | } |
| 2336 | } |
| 2337 | } |
| 2338 | if (found_entry) { |
| 2339 | DPRINTK("After vcc was added\n"); |
| 2340 | dump_arp_table(priv); |
| 2341 | goto out; |
| 2342 | } |
| 2343 | /* Not found, snatch address from first data packet that arrives from |
| 2344 | this vcc */ |
| 2345 | entry = make_entry(priv, bus_mac); |
| 2346 | if (!entry) |
| 2347 | goto out; |
| 2348 | entry->vcc = vcc; |
| 2349 | entry->old_push = old_push; |
| 2350 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2351 | memset(entry->mac_addr, 0, ETH_ALEN); |
| 2352 | entry->status = ESI_UNKNOWN; |
| 2353 | entry->next = priv->lec_arp_empty_ones; |
| 2354 | priv->lec_arp_empty_ones = entry; |
| 2355 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
| 2356 | entry->timer.function = lec_arp_expire_vcc; |
| 2357 | add_timer(&entry->timer); |
| 2358 | DPRINTK("After vcc was added\n"); |
| 2359 | dump_arp_table(priv); |
| 2360 | out: |
| 2361 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2362 | } |
| 2363 | |
| 2364 | static void |
| 2365 | lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
| 2366 | { |
| 2367 | unsigned long flags; |
| 2368 | struct lec_arp_table *entry; |
| 2369 | int i; |
| 2370 | |
| 2371 | DPRINTK("LEC:lec_flush_complete %lx\n",tran_id); |
| 2372 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2373 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2374 | for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) { |
| 2375 | if (entry->flush_tran_id == tran_id && |
| 2376 | entry->status == ESI_FLUSH_PENDING) { |
| 2377 | struct sk_buff *skb; |
| 2378 | |
| 2379 | while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) |
| 2380 | lec_send(entry->vcc, skb, entry->priv); |
| 2381 | entry->status = ESI_FORWARD_DIRECT; |
| 2382 | DPRINTK("LEC_ARP: Flushed\n"); |
| 2383 | } |
| 2384 | } |
| 2385 | } |
| 2386 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2387 | dump_arp_table(priv); |
| 2388 | } |
| 2389 | |
| 2390 | static void |
| 2391 | lec_set_flush_tran_id(struct lec_priv *priv, |
| 2392 | unsigned char *atm_addr, unsigned long tran_id) |
| 2393 | { |
| 2394 | unsigned long flags; |
| 2395 | struct lec_arp_table *entry; |
| 2396 | int i; |
| 2397 | |
| 2398 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2399 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
| 2400 | for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next) |
| 2401 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
| 2402 | entry->flush_tran_id = tran_id; |
| 2403 | DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry); |
| 2404 | } |
| 2405 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2406 | } |
| 2407 | |
| 2408 | static int |
| 2409 | lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
| 2410 | { |
| 2411 | unsigned long flags; |
| 2412 | unsigned char mac_addr[] = { |
| 2413 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| 2414 | struct lec_arp_table *to_add; |
| 2415 | struct lec_vcc_priv *vpriv; |
| 2416 | int err = 0; |
| 2417 | |
| 2418 | if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) |
| 2419 | return -ENOMEM; |
| 2420 | vpriv->xoff = 0; |
| 2421 | vpriv->old_pop = vcc->pop; |
| 2422 | vcc->user_back = vpriv; |
| 2423 | vcc->pop = lec_pop; |
| 2424 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2425 | to_add = make_entry(priv, mac_addr); |
| 2426 | if (!to_add) { |
| 2427 | vcc->pop = vpriv->old_pop; |
| 2428 | kfree(vpriv); |
| 2429 | err = -ENOMEM; |
| 2430 | goto out; |
| 2431 | } |
| 2432 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
| 2433 | to_add->status = ESI_FORWARD_DIRECT; |
| 2434 | to_add->flags |= LEC_PERMANENT_FLAG; |
| 2435 | to_add->vcc = vcc; |
| 2436 | to_add->old_push = vcc->push; |
| 2437 | vcc->push = lec_push; |
| 2438 | priv->mcast_vcc = vcc; |
| 2439 | lec_arp_add(priv, to_add); |
| 2440 | out: |
| 2441 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2442 | return err; |
| 2443 | } |
| 2444 | |
| 2445 | static void |
| 2446 | lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
| 2447 | { |
| 2448 | unsigned long flags; |
| 2449 | struct lec_arp_table *entry, *next; |
| 2450 | int i; |
| 2451 | |
| 2452 | DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci); |
| 2453 | dump_arp_table(priv); |
| 2454 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2455 | for(i=0;i<LEC_ARP_TABLE_SIZE;i++) { |
| 2456 | for(entry = priv->lec_arp_tables[i];entry; entry=next) { |
| 2457 | next = entry->next; |
| 2458 | if (vcc == entry->vcc) { |
| 2459 | lec_arp_remove(priv, entry); |
| 2460 | kfree(entry); |
| 2461 | if (priv->mcast_vcc == vcc) { |
| 2462 | priv->mcast_vcc = NULL; |
| 2463 | } |
| 2464 | } |
| 2465 | } |
| 2466 | } |
| 2467 | |
| 2468 | entry = priv->lec_arp_empty_ones; |
| 2469 | priv->lec_arp_empty_ones = NULL; |
| 2470 | while (entry != NULL) { |
| 2471 | next = entry->next; |
| 2472 | if (entry->vcc == vcc) { /* leave it out from the list */ |
| 2473 | lec_arp_clear_vccs(entry); |
| 2474 | del_timer(&entry->timer); |
| 2475 | kfree(entry); |
| 2476 | } |
| 2477 | else { /* put it back to the list */ |
| 2478 | entry->next = priv->lec_arp_empty_ones; |
| 2479 | priv->lec_arp_empty_ones = entry; |
| 2480 | } |
| 2481 | entry = next; |
| 2482 | } |
| 2483 | |
| 2484 | entry = priv->lec_no_forward; |
| 2485 | priv->lec_no_forward = NULL; |
| 2486 | while (entry != NULL) { |
| 2487 | next = entry->next; |
| 2488 | if (entry->recv_vcc == vcc) { |
| 2489 | lec_arp_clear_vccs(entry); |
| 2490 | del_timer(&entry->timer); |
| 2491 | kfree(entry); |
| 2492 | } |
| 2493 | else { |
| 2494 | entry->next = priv->lec_no_forward; |
| 2495 | priv->lec_no_forward = entry; |
| 2496 | } |
| 2497 | entry = next; |
| 2498 | } |
| 2499 | |
| 2500 | entry = priv->mcast_fwds; |
| 2501 | priv->mcast_fwds = NULL; |
| 2502 | while (entry != NULL) { |
| 2503 | next = entry->next; |
| 2504 | if (entry->recv_vcc == vcc) { |
| 2505 | lec_arp_clear_vccs(entry); |
| 2506 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 2507 | kfree(entry); |
| 2508 | } |
| 2509 | else { |
| 2510 | entry->next = priv->mcast_fwds; |
| 2511 | priv->mcast_fwds = entry; |
| 2512 | } |
| 2513 | entry = next; |
| 2514 | } |
| 2515 | |
| 2516 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2517 | dump_arp_table(priv); |
| 2518 | } |
| 2519 | |
| 2520 | static void |
| 2521 | lec_arp_check_empties(struct lec_priv *priv, |
| 2522 | struct atm_vcc *vcc, struct sk_buff *skb) |
| 2523 | { |
| 2524 | unsigned long flags; |
| 2525 | struct lec_arp_table *entry, *prev; |
| 2526 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
| 2527 | unsigned char *src; |
| 2528 | #ifdef CONFIG_TR |
| 2529 | struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; |
| 2530 | |
| 2531 | if (priv->is_trdev) src = tr_hdr->h_source; |
| 2532 | else |
| 2533 | #endif |
| 2534 | src = hdr->h_source; |
| 2535 | |
| 2536 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2537 | entry = priv->lec_arp_empty_ones; |
| 2538 | if (vcc == entry->vcc) { |
| 2539 | del_timer(&entry->timer); |
| 2540 | memcpy(entry->mac_addr, src, ETH_ALEN); |
| 2541 | entry->status = ESI_FORWARD_DIRECT; |
| 2542 | entry->last_used = jiffies; |
| 2543 | priv->lec_arp_empty_ones = entry->next; |
| 2544 | /* We might have got an entry */ |
| 2545 | if ((prev = lec_arp_find(priv,src))) { |
| 2546 | lec_arp_remove(priv, prev); |
| 2547 | kfree(prev); |
| 2548 | } |
| 2549 | lec_arp_add(priv, entry); |
| 2550 | goto out; |
| 2551 | } |
| 2552 | prev = entry; |
| 2553 | entry = entry->next; |
| 2554 | while (entry && entry->vcc != vcc) { |
| 2555 | prev= entry; |
| 2556 | entry = entry->next; |
| 2557 | } |
| 2558 | if (!entry) { |
| 2559 | DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n"); |
| 2560 | goto out; |
| 2561 | } |
| 2562 | del_timer(&entry->timer); |
| 2563 | memcpy(entry->mac_addr, src, ETH_ALEN); |
| 2564 | entry->status = ESI_FORWARD_DIRECT; |
| 2565 | entry->last_used = jiffies; |
| 2566 | prev->next = entry->next; |
| 2567 | if ((prev = lec_arp_find(priv, src))) { |
| 2568 | lec_arp_remove(priv, prev); |
| 2569 | kfree(prev); |
| 2570 | } |
| 2571 | lec_arp_add(priv, entry); |
| 2572 | out: |
| 2573 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2574 | } |
| 2575 | MODULE_LICENSE("GPL"); |