Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 1 | /* |
| 2 | * lec.c: Lan Emulation driver |
| 3 | * |
| 4 | * Marko Kiiskila <mkiiskila@yahoo.com> |
| 5 | */ |
| 6 | |
| 7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| 8 | |
| 9 | #include <linux/slab.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/bitops.h> |
| 12 | #include <linux/capability.h> |
| 13 | |
| 14 | /* We are ethernet device */ |
| 15 | #include <linux/if_ether.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/etherdevice.h> |
| 18 | #include <net/sock.h> |
| 19 | #include <linux/skbuff.h> |
| 20 | #include <linux/ip.h> |
| 21 | #include <asm/byteorder.h> |
| 22 | #include <linux/uaccess.h> |
| 23 | #include <net/arp.h> |
| 24 | #include <net/dst.h> |
| 25 | #include <linux/proc_fs.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/seq_file.h> |
| 28 | |
| 29 | /* And atm device */ |
| 30 | #include <linux/atmdev.h> |
| 31 | #include <linux/atmlec.h> |
| 32 | |
| 33 | /* Proxy LEC knows about bridging */ |
| 34 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 35 | #include "../bridge/br_private.h" |
| 36 | |
| 37 | static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; |
| 38 | #endif |
| 39 | |
| 40 | /* Modular too */ |
| 41 | #include <linux/module.h> |
| 42 | #include <linux/init.h> |
| 43 | |
| 44 | #include "lec.h" |
| 45 | #include "lec_arpc.h" |
| 46 | #include "resources.h" |
| 47 | |
| 48 | #define DUMP_PACKETS 0 /* |
| 49 | * 0 = None, |
| 50 | * 1 = 30 first bytes |
| 51 | * 2 = Whole packet |
| 52 | */ |
| 53 | |
| 54 | #define LEC_UNRES_QUE_LEN 8 /* |
| 55 | * number of tx packets to queue for a |
| 56 | * single destination while waiting for SVC |
| 57 | */ |
| 58 | |
| 59 | static int lec_open(struct net_device *dev); |
| 60 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
| 61 | struct net_device *dev); |
| 62 | static int lec_close(struct net_device *dev); |
| 63 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
| 64 | const unsigned char *mac_addr); |
| 65 | static int lec_arp_remove(struct lec_priv *priv, |
| 66 | struct lec_arp_table *to_remove); |
| 67 | /* LANE2 functions */ |
| 68 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, |
| 69 | const u8 *tlvs, u32 sizeoftlvs); |
| 70 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
| 71 | u8 **tlvs, u32 *sizeoftlvs); |
| 72 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
| 73 | const u8 *tlvs, u32 sizeoftlvs); |
| 74 | |
| 75 | static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
| 76 | unsigned long permanent); |
| 77 | static void lec_arp_check_empties(struct lec_priv *priv, |
| 78 | struct atm_vcc *vcc, struct sk_buff *skb); |
| 79 | static void lec_arp_destroy(struct lec_priv *priv); |
| 80 | static void lec_arp_init(struct lec_priv *priv); |
| 81 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
| 82 | const unsigned char *mac_to_find, |
| 83 | int is_rdesc, |
| 84 | struct lec_arp_table **ret_entry); |
| 85 | static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
| 86 | const unsigned char *atm_addr, |
| 87 | unsigned long remoteflag, |
| 88 | unsigned int targetless_le_arp); |
| 89 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); |
| 90 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); |
| 91 | static void lec_set_flush_tran_id(struct lec_priv *priv, |
| 92 | const unsigned char *atm_addr, |
| 93 | unsigned long tran_id); |
| 94 | static void lec_vcc_added(struct lec_priv *priv, |
| 95 | const struct atmlec_ioc *ioc_data, |
| 96 | struct atm_vcc *vcc, |
| 97 | void (*old_push)(struct atm_vcc *vcc, |
| 98 | struct sk_buff *skb)); |
| 99 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); |
| 100 | |
| 101 | /* must be done under lec_arp_lock */ |
| 102 | static inline void lec_arp_hold(struct lec_arp_table *entry) |
| 103 | { |
| 104 | atomic_inc(&entry->usage); |
| 105 | } |
| 106 | |
| 107 | static inline void lec_arp_put(struct lec_arp_table *entry) |
| 108 | { |
| 109 | if (atomic_dec_and_test(&entry->usage)) |
| 110 | kfree(entry); |
| 111 | } |
| 112 | |
| 113 | static struct lane2_ops lane2_ops = { |
| 114 | lane2_resolve, /* resolve, spec 3.1.3 */ |
| 115 | lane2_associate_req, /* associate_req, spec 3.1.4 */ |
| 116 | NULL /* associate indicator, spec 3.1.5 */ |
| 117 | }; |
| 118 | |
| 119 | static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| 120 | |
| 121 | /* Device structures */ |
| 122 | static struct net_device *dev_lec[MAX_LEC_ITF]; |
| 123 | |
| 124 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 125 | static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) |
| 126 | { |
| 127 | char *buff; |
| 128 | struct lec_priv *priv; |
| 129 | |
| 130 | /* |
| 131 | * Check if this is a BPDU. If so, ask zeppelin to send |
| 132 | * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit |
| 133 | * as the Config BPDU has |
| 134 | */ |
| 135 | buff = skb->data + skb->dev->hard_header_len; |
| 136 | if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { |
| 137 | struct sock *sk; |
| 138 | struct sk_buff *skb2; |
| 139 | struct atmlec_msg *mesg; |
| 140 | |
| 141 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 142 | if (skb2 == NULL) |
| 143 | return; |
| 144 | skb2->len = sizeof(struct atmlec_msg); |
| 145 | mesg = (struct atmlec_msg *)skb2->data; |
| 146 | mesg->type = l_topology_change; |
| 147 | buff += 4; |
| 148 | mesg->content.normal.flag = *buff & 0x01; |
| 149 | /* 0x01 is topology change */ |
| 150 | |
| 151 | priv = netdev_priv(dev); |
| 152 | atm_force_charge(priv->lecd, skb2->truesize); |
| 153 | sk = sk_atm(priv->lecd); |
| 154 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
| 155 | sk->sk_data_ready(sk); |
| 156 | } |
| 157 | } |
| 158 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
| 159 | |
| 160 | /* |
| 161 | * Open/initialize the netdevice. This is called (in the current kernel) |
| 162 | * sometime after booting when the 'ifconfig' program is run. |
| 163 | * |
| 164 | * This routine should set everything up anew at each open, even |
| 165 | * registers that "should" only need to be set once at boot, so that |
| 166 | * there is non-reboot way to recover if something goes wrong. |
| 167 | */ |
| 168 | |
| 169 | static int lec_open(struct net_device *dev) |
| 170 | { |
| 171 | netif_start_queue(dev); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | lec_send(struct atm_vcc *vcc, struct sk_buff *skb) |
| 178 | { |
| 179 | struct net_device *dev = skb->dev; |
| 180 | |
| 181 | ATM_SKB(skb)->vcc = vcc; |
| 182 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
| 183 | |
| 184 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
| 185 | if (vcc->send(vcc, skb) < 0) { |
| 186 | dev->stats.tx_dropped++; |
| 187 | return; |
| 188 | } |
| 189 | |
| 190 | dev->stats.tx_packets++; |
| 191 | dev->stats.tx_bytes += skb->len; |
| 192 | } |
| 193 | |
| 194 | static void lec_tx_timeout(struct net_device *dev) |
| 195 | { |
| 196 | pr_info("%s\n", dev->name); |
| 197 | dev->trans_start = jiffies; |
| 198 | netif_wake_queue(dev); |
| 199 | } |
| 200 | |
| 201 | static netdev_tx_t lec_start_xmit(struct sk_buff *skb, |
| 202 | struct net_device *dev) |
| 203 | { |
| 204 | struct sk_buff *skb2; |
| 205 | struct lec_priv *priv = netdev_priv(dev); |
| 206 | struct lecdatahdr_8023 *lec_h; |
| 207 | struct atm_vcc *vcc; |
| 208 | struct lec_arp_table *entry; |
| 209 | unsigned char *dst; |
| 210 | int min_frame_size; |
| 211 | int is_rdesc; |
| 212 | |
| 213 | pr_debug("called\n"); |
| 214 | if (!priv->lecd) { |
| 215 | pr_info("%s:No lecd attached\n", dev->name); |
| 216 | dev->stats.tx_errors++; |
| 217 | netif_stop_queue(dev); |
| 218 | kfree_skb(skb); |
| 219 | return NETDEV_TX_OK; |
| 220 | } |
| 221 | |
| 222 | pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", |
| 223 | (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), |
| 224 | (long)skb_end_pointer(skb)); |
| 225 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 226 | if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) |
| 227 | lec_handle_bridge(skb, dev); |
| 228 | #endif |
| 229 | |
| 230 | /* Make sure we have room for lec_id */ |
| 231 | if (skb_headroom(skb) < 2) { |
| 232 | pr_debug("reallocating skb\n"); |
| 233 | skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); |
| 234 | if (unlikely(!skb2)) { |
| 235 | kfree_skb(skb); |
| 236 | return NETDEV_TX_OK; |
| 237 | } |
| 238 | consume_skb(skb); |
| 239 | skb = skb2; |
| 240 | } |
| 241 | skb_push(skb, 2); |
| 242 | |
| 243 | /* Put le header to place */ |
| 244 | lec_h = (struct lecdatahdr_8023 *)skb->data; |
| 245 | lec_h->le_header = htons(priv->lecid); |
| 246 | |
| 247 | #if DUMP_PACKETS >= 2 |
| 248 | #define MAX_DUMP_SKB 99 |
| 249 | #elif DUMP_PACKETS >= 1 |
| 250 | #define MAX_DUMP_SKB 30 |
| 251 | #endif |
| 252 | #if DUMP_PACKETS >= 1 |
| 253 | printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n", |
| 254 | dev->name, skb->len, priv->lecid); |
| 255 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
| 256 | skb->data, min(skb->len, MAX_DUMP_SKB), true); |
| 257 | #endif /* DUMP_PACKETS >= 1 */ |
| 258 | |
| 259 | /* Minimum ethernet-frame size */ |
| 260 | min_frame_size = LEC_MINIMUM_8023_SIZE; |
| 261 | if (skb->len < min_frame_size) { |
| 262 | if ((skb->len + skb_tailroom(skb)) < min_frame_size) { |
| 263 | skb2 = skb_copy_expand(skb, 0, |
| 264 | min_frame_size - skb->truesize, |
| 265 | GFP_ATOMIC); |
| 266 | dev_kfree_skb(skb); |
| 267 | if (skb2 == NULL) { |
| 268 | dev->stats.tx_dropped++; |
| 269 | return NETDEV_TX_OK; |
| 270 | } |
| 271 | skb = skb2; |
| 272 | } |
| 273 | skb_put(skb, min_frame_size - skb->len); |
| 274 | } |
| 275 | |
| 276 | /* Send to right vcc */ |
| 277 | is_rdesc = 0; |
| 278 | dst = lec_h->h_dest; |
| 279 | entry = NULL; |
| 280 | vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); |
| 281 | pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", |
| 282 | dev->name, vcc, vcc ? vcc->flags : 0, entry); |
| 283 | if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { |
| 284 | if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { |
| 285 | pr_debug("%s:queuing packet, MAC address %pM\n", |
| 286 | dev->name, lec_h->h_dest); |
| 287 | skb_queue_tail(&entry->tx_wait, skb); |
| 288 | } else { |
| 289 | pr_debug("%s:tx queue full or no arp entry, dropping, MAC address: %pM\n", |
| 290 | dev->name, lec_h->h_dest); |
| 291 | dev->stats.tx_dropped++; |
| 292 | dev_kfree_skb(skb); |
| 293 | } |
| 294 | goto out; |
| 295 | } |
| 296 | #if DUMP_PACKETS > 0 |
| 297 | printk(KERN_DEBUG "%s:sending to vpi:%d vci:%d\n", |
| 298 | dev->name, vcc->vpi, vcc->vci); |
| 299 | #endif /* DUMP_PACKETS > 0 */ |
| 300 | |
| 301 | while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { |
| 302 | pr_debug("emptying tx queue, MAC address %pM\n", lec_h->h_dest); |
| 303 | lec_send(vcc, skb2); |
| 304 | } |
| 305 | |
| 306 | lec_send(vcc, skb); |
| 307 | |
| 308 | if (!atm_may_send(vcc, 0)) { |
| 309 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 310 | |
| 311 | vpriv->xoff = 1; |
| 312 | netif_stop_queue(dev); |
| 313 | |
| 314 | /* |
| 315 | * vcc->pop() might have occurred in between, making |
| 316 | * the vcc usuable again. Since xmit is serialized, |
| 317 | * this is the only situation we have to re-test. |
| 318 | */ |
| 319 | |
| 320 | if (atm_may_send(vcc, 0)) |
| 321 | netif_wake_queue(dev); |
| 322 | } |
| 323 | |
| 324 | out: |
| 325 | if (entry) |
| 326 | lec_arp_put(entry); |
| 327 | dev->trans_start = jiffies; |
| 328 | return NETDEV_TX_OK; |
| 329 | } |
| 330 | |
| 331 | /* The inverse routine to net_open(). */ |
| 332 | static int lec_close(struct net_device *dev) |
| 333 | { |
| 334 | netif_stop_queue(dev); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) |
| 339 | { |
| 340 | unsigned long flags; |
| 341 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 342 | struct lec_priv *priv = netdev_priv(dev); |
| 343 | struct atmlec_msg *mesg; |
| 344 | struct lec_arp_table *entry; |
| 345 | int i; |
| 346 | char *tmp; /* FIXME */ |
| 347 | |
| 348 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
| 349 | mesg = (struct atmlec_msg *)skb->data; |
| 350 | tmp = skb->data; |
| 351 | tmp += sizeof(struct atmlec_msg); |
| 352 | pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); |
| 353 | switch (mesg->type) { |
| 354 | case l_set_mac_addr: |
| 355 | for (i = 0; i < 6; i++) |
| 356 | dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; |
| 357 | break; |
| 358 | case l_del_mac_addr: |
| 359 | for (i = 0; i < 6; i++) |
| 360 | dev->dev_addr[i] = 0; |
| 361 | break; |
| 362 | case l_addr_delete: |
| 363 | lec_addr_delete(priv, mesg->content.normal.atm_addr, |
| 364 | mesg->content.normal.flag); |
| 365 | break; |
| 366 | case l_topology_change: |
| 367 | priv->topology_change = mesg->content.normal.flag; |
| 368 | break; |
| 369 | case l_flush_complete: |
| 370 | lec_flush_complete(priv, mesg->content.normal.flag); |
| 371 | break; |
| 372 | case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ |
| 373 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 374 | entry = lec_arp_find(priv, mesg->content.normal.mac_addr); |
| 375 | lec_arp_remove(priv, entry); |
| 376 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 377 | |
| 378 | if (mesg->content.normal.no_source_le_narp) |
| 379 | break; |
| 380 | /* FALL THROUGH */ |
| 381 | case l_arp_update: |
| 382 | lec_arp_update(priv, mesg->content.normal.mac_addr, |
| 383 | mesg->content.normal.atm_addr, |
| 384 | mesg->content.normal.flag, |
| 385 | mesg->content.normal.targetless_le_arp); |
| 386 | pr_debug("in l_arp_update\n"); |
| 387 | if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ |
| 388 | pr_debug("LANE2 3.1.5, got tlvs, size %d\n", |
| 389 | mesg->sizeoftlvs); |
| 390 | lane2_associate_ind(dev, mesg->content.normal.mac_addr, |
| 391 | tmp, mesg->sizeoftlvs); |
| 392 | } |
| 393 | break; |
| 394 | case l_config: |
| 395 | priv->maximum_unknown_frame_count = |
| 396 | mesg->content.config.maximum_unknown_frame_count; |
| 397 | priv->max_unknown_frame_time = |
| 398 | (mesg->content.config.max_unknown_frame_time * HZ); |
| 399 | priv->max_retry_count = mesg->content.config.max_retry_count; |
| 400 | priv->aging_time = (mesg->content.config.aging_time * HZ); |
| 401 | priv->forward_delay_time = |
| 402 | (mesg->content.config.forward_delay_time * HZ); |
| 403 | priv->arp_response_time = |
| 404 | (mesg->content.config.arp_response_time * HZ); |
| 405 | priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); |
| 406 | priv->path_switching_delay = |
| 407 | (mesg->content.config.path_switching_delay * HZ); |
| 408 | priv->lane_version = mesg->content.config.lane_version; |
| 409 | /* LANE2 */ |
| 410 | priv->lane2_ops = NULL; |
| 411 | if (priv->lane_version > 1) |
| 412 | priv->lane2_ops = &lane2_ops; |
| 413 | rtnl_lock(); |
| 414 | if (dev_set_mtu(dev, mesg->content.config.mtu)) |
| 415 | pr_info("%s: change_mtu to %d failed\n", |
| 416 | dev->name, mesg->content.config.mtu); |
| 417 | rtnl_unlock(); |
| 418 | priv->is_proxy = mesg->content.config.is_proxy; |
| 419 | break; |
| 420 | case l_flush_tran_id: |
| 421 | lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, |
| 422 | mesg->content.normal.flag); |
| 423 | break; |
| 424 | case l_set_lecid: |
| 425 | priv->lecid = |
| 426 | (unsigned short)(0xffff & mesg->content.normal.flag); |
| 427 | break; |
| 428 | case l_should_bridge: |
| 429 | #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) |
| 430 | { |
| 431 | pr_debug("%s: bridge zeppelin asks about %pM\n", |
| 432 | dev->name, mesg->content.proxy.mac_addr); |
| 433 | |
| 434 | if (br_fdb_test_addr_hook == NULL) |
| 435 | break; |
| 436 | |
| 437 | if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) { |
| 438 | /* hit from bridge table, send LE_ARP_RESPONSE */ |
| 439 | struct sk_buff *skb2; |
| 440 | struct sock *sk; |
| 441 | |
| 442 | pr_debug("%s: entry found, responding to zeppelin\n", |
| 443 | dev->name); |
| 444 | skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 445 | if (skb2 == NULL) |
| 446 | break; |
| 447 | skb2->len = sizeof(struct atmlec_msg); |
| 448 | skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg)); |
| 449 | atm_force_charge(priv->lecd, skb2->truesize); |
| 450 | sk = sk_atm(priv->lecd); |
| 451 | skb_queue_tail(&sk->sk_receive_queue, skb2); |
| 452 | sk->sk_data_ready(sk); |
| 453 | } |
| 454 | } |
| 455 | #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ |
| 456 | break; |
| 457 | default: |
| 458 | pr_info("%s: Unknown message type %d\n", dev->name, mesg->type); |
| 459 | dev_kfree_skb(skb); |
| 460 | return -EINVAL; |
| 461 | } |
| 462 | dev_kfree_skb(skb); |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static void lec_atm_close(struct atm_vcc *vcc) |
| 467 | { |
| 468 | struct sk_buff *skb; |
| 469 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 470 | struct lec_priv *priv = netdev_priv(dev); |
| 471 | |
| 472 | priv->lecd = NULL; |
| 473 | /* Do something needful? */ |
| 474 | |
| 475 | netif_stop_queue(dev); |
| 476 | lec_arp_destroy(priv); |
| 477 | |
| 478 | if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) |
| 479 | pr_info("%s closing with messages pending\n", dev->name); |
| 480 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { |
| 481 | atm_return(vcc, skb->truesize); |
| 482 | dev_kfree_skb(skb); |
| 483 | } |
| 484 | |
| 485 | pr_info("%s: Shut down!\n", dev->name); |
| 486 | module_put(THIS_MODULE); |
| 487 | } |
| 488 | |
| 489 | static struct atmdev_ops lecdev_ops = { |
| 490 | .close = lec_atm_close, |
| 491 | .send = lec_atm_send |
| 492 | }; |
| 493 | |
| 494 | static struct atm_dev lecatm_dev = { |
| 495 | .ops = &lecdev_ops, |
| 496 | .type = "lec", |
| 497 | .number = 999, /* dummy device number */ |
| 498 | .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) |
| 499 | }; |
| 500 | |
| 501 | /* |
| 502 | * LANE2: new argument struct sk_buff *data contains |
| 503 | * the LE_ARP based TLVs introduced in the LANE2 spec |
| 504 | */ |
| 505 | static int |
| 506 | send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, |
| 507 | const unsigned char *mac_addr, const unsigned char *atm_addr, |
| 508 | struct sk_buff *data) |
| 509 | { |
| 510 | struct sock *sk; |
| 511 | struct sk_buff *skb; |
| 512 | struct atmlec_msg *mesg; |
| 513 | |
| 514 | if (!priv || !priv->lecd) |
| 515 | return -1; |
| 516 | skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); |
| 517 | if (!skb) |
| 518 | return -1; |
| 519 | skb->len = sizeof(struct atmlec_msg); |
| 520 | mesg = (struct atmlec_msg *)skb->data; |
| 521 | memset(mesg, 0, sizeof(struct atmlec_msg)); |
| 522 | mesg->type = type; |
| 523 | if (data != NULL) |
| 524 | mesg->sizeoftlvs = data->len; |
| 525 | if (mac_addr) |
| 526 | ether_addr_copy(mesg->content.normal.mac_addr, mac_addr); |
| 527 | else |
| 528 | mesg->content.normal.targetless_le_arp = 1; |
| 529 | if (atm_addr) |
| 530 | memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); |
| 531 | |
| 532 | atm_force_charge(priv->lecd, skb->truesize); |
| 533 | sk = sk_atm(priv->lecd); |
| 534 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 535 | sk->sk_data_ready(sk); |
| 536 | |
| 537 | if (data != NULL) { |
| 538 | pr_debug("about to send %d bytes of data\n", data->len); |
| 539 | atm_force_charge(priv->lecd, data->truesize); |
| 540 | skb_queue_tail(&sk->sk_receive_queue, data); |
| 541 | sk->sk_data_ready(sk); |
| 542 | } |
| 543 | |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | /* shamelessly stolen from drivers/net/net_init.c */ |
| 548 | static int lec_change_mtu(struct net_device *dev, int new_mtu) |
| 549 | { |
| 550 | if ((new_mtu < 68) || (new_mtu > 18190)) |
| 551 | return -EINVAL; |
| 552 | dev->mtu = new_mtu; |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | static void lec_set_multicast_list(struct net_device *dev) |
| 557 | { |
| 558 | /* |
| 559 | * by default, all multicast frames arrive over the bus. |
| 560 | * eventually support selective multicast service |
| 561 | */ |
| 562 | } |
| 563 | |
| 564 | static const struct net_device_ops lec_netdev_ops = { |
| 565 | .ndo_open = lec_open, |
| 566 | .ndo_stop = lec_close, |
| 567 | .ndo_start_xmit = lec_start_xmit, |
| 568 | .ndo_change_mtu = lec_change_mtu, |
| 569 | .ndo_tx_timeout = lec_tx_timeout, |
| 570 | .ndo_set_rx_mode = lec_set_multicast_list, |
| 571 | }; |
| 572 | |
| 573 | static const unsigned char lec_ctrl_magic[] = { |
| 574 | 0xff, |
| 575 | 0x00, |
| 576 | 0x01, |
| 577 | 0x01 |
| 578 | }; |
| 579 | |
| 580 | #define LEC_DATA_DIRECT_8023 2 |
| 581 | #define LEC_DATA_DIRECT_8025 3 |
| 582 | |
| 583 | static int lec_is_data_direct(struct atm_vcc *vcc) |
| 584 | { |
| 585 | return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || |
| 586 | (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); |
| 587 | } |
| 588 | |
| 589 | static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) |
| 590 | { |
| 591 | unsigned long flags; |
| 592 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 593 | struct lec_priv *priv = netdev_priv(dev); |
| 594 | |
| 595 | #if DUMP_PACKETS > 0 |
| 596 | printk(KERN_DEBUG "%s: vcc vpi:%d vci:%d\n", |
| 597 | dev->name, vcc->vpi, vcc->vci); |
| 598 | #endif |
| 599 | if (!skb) { |
| 600 | pr_debug("%s: null skb\n", dev->name); |
| 601 | lec_vcc_close(priv, vcc); |
| 602 | return; |
| 603 | } |
| 604 | #if DUMP_PACKETS >= 2 |
| 605 | #define MAX_SKB_DUMP 99 |
| 606 | #elif DUMP_PACKETS >= 1 |
| 607 | #define MAX_SKB_DUMP 30 |
| 608 | #endif |
| 609 | #if DUMP_PACKETS > 0 |
| 610 | printk(KERN_DEBUG "%s: rcv datalen:%ld lecid:%4.4x\n", |
| 611 | dev->name, skb->len, priv->lecid); |
| 612 | print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1, |
| 613 | skb->data, min(MAX_SKB_DUMP, skb->len), true); |
| 614 | #endif /* DUMP_PACKETS > 0 */ |
| 615 | if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { |
| 616 | /* Control frame, to daemon */ |
| 617 | struct sock *sk = sk_atm(vcc); |
| 618 | |
| 619 | pr_debug("%s: To daemon\n", dev->name); |
| 620 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 621 | sk->sk_data_ready(sk); |
| 622 | } else { /* Data frame, queue to protocol handlers */ |
| 623 | struct lec_arp_table *entry; |
| 624 | unsigned char *src, *dst; |
| 625 | |
| 626 | atm_return(vcc, skb->truesize); |
| 627 | if (*(__be16 *) skb->data == htons(priv->lecid) || |
| 628 | !priv->lecd || !(dev->flags & IFF_UP)) { |
| 629 | /* |
| 630 | * Probably looping back, or if lecd is missing, |
| 631 | * lecd has gone down |
| 632 | */ |
| 633 | pr_debug("Ignoring frame...\n"); |
| 634 | dev_kfree_skb(skb); |
| 635 | return; |
| 636 | } |
| 637 | dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; |
| 638 | |
| 639 | /* |
| 640 | * If this is a Data Direct VCC, and the VCC does not match |
| 641 | * the LE_ARP cache entry, delete the LE_ARP cache entry. |
| 642 | */ |
| 643 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 644 | if (lec_is_data_direct(vcc)) { |
| 645 | src = ((struct lecdatahdr_8023 *)skb->data)->h_source; |
| 646 | entry = lec_arp_find(priv, src); |
| 647 | if (entry && entry->vcc != vcc) { |
| 648 | lec_arp_remove(priv, entry); |
| 649 | lec_arp_put(entry); |
| 650 | } |
| 651 | } |
| 652 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 653 | |
| 654 | if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ |
| 655 | !priv->is_proxy && /* Proxy wants all the packets */ |
| 656 | memcmp(dst, dev->dev_addr, dev->addr_len)) { |
| 657 | dev_kfree_skb(skb); |
| 658 | return; |
| 659 | } |
| 660 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
| 661 | lec_arp_check_empties(priv, vcc, skb); |
| 662 | skb_pull(skb, 2); /* skip lec_id */ |
| 663 | skb->protocol = eth_type_trans(skb, dev); |
| 664 | dev->stats.rx_packets++; |
| 665 | dev->stats.rx_bytes += skb->len; |
| 666 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
| 667 | netif_rx(skb); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
| 672 | { |
| 673 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 674 | struct net_device *dev = skb->dev; |
| 675 | |
| 676 | if (vpriv == NULL) { |
| 677 | pr_info("vpriv = NULL!?!?!?\n"); |
| 678 | return; |
| 679 | } |
| 680 | |
| 681 | vpriv->old_pop(vcc, skb); |
| 682 | |
| 683 | if (vpriv->xoff && atm_may_send(vcc, 0)) { |
| 684 | vpriv->xoff = 0; |
| 685 | if (netif_running(dev) && netif_queue_stopped(dev)) |
| 686 | netif_wake_queue(dev); |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) |
| 691 | { |
| 692 | struct lec_vcc_priv *vpriv; |
| 693 | int bytes_left; |
| 694 | struct atmlec_ioc ioc_data; |
| 695 | |
| 696 | /* Lecd must be up in this case */ |
| 697 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); |
| 698 | if (bytes_left != 0) |
| 699 | pr_info("copy from user failed for %d bytes\n", bytes_left); |
| 700 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || |
| 701 | !dev_lec[ioc_data.dev_num]) |
| 702 | return -EINVAL; |
| 703 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
| 704 | if (!vpriv) |
| 705 | return -ENOMEM; |
| 706 | vpriv->xoff = 0; |
| 707 | vpriv->old_pop = vcc->pop; |
| 708 | vcc->user_back = vpriv; |
| 709 | vcc->pop = lec_pop; |
| 710 | lec_vcc_added(netdev_priv(dev_lec[ioc_data.dev_num]), |
| 711 | &ioc_data, vcc, vcc->push); |
| 712 | vcc->proto_data = dev_lec[ioc_data.dev_num]; |
| 713 | vcc->push = lec_push; |
| 714 | return 0; |
| 715 | } |
| 716 | |
| 717 | static int lec_mcast_attach(struct atm_vcc *vcc, int arg) |
| 718 | { |
| 719 | if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) |
| 720 | return -EINVAL; |
| 721 | vcc->proto_data = dev_lec[arg]; |
| 722 | return lec_mcast_make(netdev_priv(dev_lec[arg]), vcc); |
| 723 | } |
| 724 | |
| 725 | /* Initialize device. */ |
| 726 | static int lecd_attach(struct atm_vcc *vcc, int arg) |
| 727 | { |
| 728 | int i; |
| 729 | struct lec_priv *priv; |
| 730 | |
| 731 | if (arg < 0) |
| 732 | i = 0; |
| 733 | else |
| 734 | i = arg; |
| 735 | if (arg >= MAX_LEC_ITF) |
| 736 | return -EINVAL; |
| 737 | if (!dev_lec[i]) { |
| 738 | int size; |
| 739 | |
| 740 | size = sizeof(struct lec_priv); |
| 741 | dev_lec[i] = alloc_etherdev(size); |
| 742 | if (!dev_lec[i]) |
| 743 | return -ENOMEM; |
| 744 | dev_lec[i]->netdev_ops = &lec_netdev_ops; |
| 745 | snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); |
| 746 | if (register_netdev(dev_lec[i])) { |
| 747 | free_netdev(dev_lec[i]); |
| 748 | return -EINVAL; |
| 749 | } |
| 750 | |
| 751 | priv = netdev_priv(dev_lec[i]); |
| 752 | } else { |
| 753 | priv = netdev_priv(dev_lec[i]); |
| 754 | if (priv->lecd) |
| 755 | return -EADDRINUSE; |
| 756 | } |
| 757 | lec_arp_init(priv); |
| 758 | priv->itfnum = i; /* LANE2 addition */ |
| 759 | priv->lecd = vcc; |
| 760 | vcc->dev = &lecatm_dev; |
| 761 | vcc_insert_socket(sk_atm(vcc)); |
| 762 | |
| 763 | vcc->proto_data = dev_lec[i]; |
| 764 | set_bit(ATM_VF_META, &vcc->flags); |
| 765 | set_bit(ATM_VF_READY, &vcc->flags); |
| 766 | |
| 767 | /* Set default values to these variables */ |
| 768 | priv->maximum_unknown_frame_count = 1; |
| 769 | priv->max_unknown_frame_time = (1 * HZ); |
| 770 | priv->vcc_timeout_period = (1200 * HZ); |
| 771 | priv->max_retry_count = 1; |
| 772 | priv->aging_time = (300 * HZ); |
| 773 | priv->forward_delay_time = (15 * HZ); |
| 774 | priv->topology_change = 0; |
| 775 | priv->arp_response_time = (1 * HZ); |
| 776 | priv->flush_timeout = (4 * HZ); |
| 777 | priv->path_switching_delay = (6 * HZ); |
| 778 | |
| 779 | if (dev_lec[i]->flags & IFF_UP) |
| 780 | netif_start_queue(dev_lec[i]); |
| 781 | __module_get(THIS_MODULE); |
| 782 | return i; |
| 783 | } |
| 784 | |
| 785 | #ifdef CONFIG_PROC_FS |
| 786 | static const char *lec_arp_get_status_string(unsigned char status) |
| 787 | { |
| 788 | static const char *const lec_arp_status_string[] = { |
| 789 | "ESI_UNKNOWN ", |
| 790 | "ESI_ARP_PENDING ", |
| 791 | "ESI_VC_PENDING ", |
| 792 | "<Undefined> ", |
| 793 | "ESI_FLUSH_PENDING ", |
| 794 | "ESI_FORWARD_DIRECT" |
| 795 | }; |
| 796 | |
| 797 | if (status > ESI_FORWARD_DIRECT) |
| 798 | status = 3; /* ESI_UNDEFINED */ |
| 799 | return lec_arp_status_string[status]; |
| 800 | } |
| 801 | |
| 802 | static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) |
| 803 | { |
| 804 | int i; |
| 805 | |
| 806 | for (i = 0; i < ETH_ALEN; i++) |
| 807 | seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); |
| 808 | seq_printf(seq, " "); |
| 809 | for (i = 0; i < ATM_ESA_LEN; i++) |
| 810 | seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); |
| 811 | seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), |
| 812 | entry->flags & 0xffff); |
| 813 | if (entry->vcc) |
| 814 | seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); |
| 815 | else |
| 816 | seq_printf(seq, " "); |
| 817 | if (entry->recv_vcc) { |
| 818 | seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, |
| 819 | entry->recv_vcc->vci); |
| 820 | } |
| 821 | seq_putc(seq, '\n'); |
| 822 | } |
| 823 | |
| 824 | struct lec_state { |
| 825 | unsigned long flags; |
| 826 | struct lec_priv *locked; |
| 827 | struct hlist_node *node; |
| 828 | struct net_device *dev; |
| 829 | int itf; |
| 830 | int arp_table; |
| 831 | int misc_table; |
| 832 | }; |
| 833 | |
| 834 | static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, |
| 835 | loff_t *l) |
| 836 | { |
| 837 | struct hlist_node *e = state->node; |
| 838 | |
| 839 | if (!e) |
| 840 | e = tbl->first; |
| 841 | if (e == SEQ_START_TOKEN) { |
| 842 | e = tbl->first; |
| 843 | --*l; |
| 844 | } |
| 845 | |
| 846 | for (; e; e = e->next) { |
| 847 | if (--*l < 0) |
| 848 | break; |
| 849 | } |
| 850 | state->node = e; |
| 851 | |
| 852 | return (*l < 0) ? state : NULL; |
| 853 | } |
| 854 | |
| 855 | static void *lec_arp_walk(struct lec_state *state, loff_t *l, |
| 856 | struct lec_priv *priv) |
| 857 | { |
| 858 | void *v = NULL; |
| 859 | int p; |
| 860 | |
| 861 | for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { |
| 862 | v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); |
| 863 | if (v) |
| 864 | break; |
| 865 | } |
| 866 | state->arp_table = p; |
| 867 | return v; |
| 868 | } |
| 869 | |
| 870 | static void *lec_misc_walk(struct lec_state *state, loff_t *l, |
| 871 | struct lec_priv *priv) |
| 872 | { |
| 873 | struct hlist_head *lec_misc_tables[] = { |
| 874 | &priv->lec_arp_empty_ones, |
| 875 | &priv->lec_no_forward, |
| 876 | &priv->mcast_fwds |
| 877 | }; |
| 878 | void *v = NULL; |
| 879 | int q; |
| 880 | |
| 881 | for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { |
| 882 | v = lec_tbl_walk(state, lec_misc_tables[q], l); |
| 883 | if (v) |
| 884 | break; |
| 885 | } |
| 886 | state->misc_table = q; |
| 887 | return v; |
| 888 | } |
| 889 | |
| 890 | static void *lec_priv_walk(struct lec_state *state, loff_t *l, |
| 891 | struct lec_priv *priv) |
| 892 | { |
| 893 | if (!state->locked) { |
| 894 | state->locked = priv; |
| 895 | spin_lock_irqsave(&priv->lec_arp_lock, state->flags); |
| 896 | } |
| 897 | if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { |
| 898 | spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); |
| 899 | state->locked = NULL; |
| 900 | /* Partial state reset for the next time we get called */ |
| 901 | state->arp_table = state->misc_table = 0; |
| 902 | } |
| 903 | return state->locked; |
| 904 | } |
| 905 | |
| 906 | static void *lec_itf_walk(struct lec_state *state, loff_t *l) |
| 907 | { |
| 908 | struct net_device *dev; |
| 909 | void *v; |
| 910 | |
| 911 | dev = state->dev ? state->dev : dev_lec[state->itf]; |
| 912 | v = (dev && netdev_priv(dev)) ? |
| 913 | lec_priv_walk(state, l, netdev_priv(dev)) : NULL; |
| 914 | if (!v && dev) { |
| 915 | dev_put(dev); |
| 916 | /* Partial state reset for the next time we get called */ |
| 917 | dev = NULL; |
| 918 | } |
| 919 | state->dev = dev; |
| 920 | return v; |
| 921 | } |
| 922 | |
| 923 | static void *lec_get_idx(struct lec_state *state, loff_t l) |
| 924 | { |
| 925 | void *v = NULL; |
| 926 | |
| 927 | for (; state->itf < MAX_LEC_ITF; state->itf++) { |
| 928 | v = lec_itf_walk(state, &l); |
| 929 | if (v) |
| 930 | break; |
| 931 | } |
| 932 | return v; |
| 933 | } |
| 934 | |
| 935 | static void *lec_seq_start(struct seq_file *seq, loff_t *pos) |
| 936 | { |
| 937 | struct lec_state *state = seq->private; |
| 938 | |
| 939 | state->itf = 0; |
| 940 | state->dev = NULL; |
| 941 | state->locked = NULL; |
| 942 | state->arp_table = 0; |
| 943 | state->misc_table = 0; |
| 944 | state->node = SEQ_START_TOKEN; |
| 945 | |
| 946 | return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; |
| 947 | } |
| 948 | |
| 949 | static void lec_seq_stop(struct seq_file *seq, void *v) |
| 950 | { |
| 951 | struct lec_state *state = seq->private; |
| 952 | |
| 953 | if (state->dev) { |
| 954 | spin_unlock_irqrestore(&state->locked->lec_arp_lock, |
| 955 | state->flags); |
| 956 | dev_put(state->dev); |
| 957 | } |
| 958 | } |
| 959 | |
| 960 | static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 961 | { |
| 962 | struct lec_state *state = seq->private; |
| 963 | |
| 964 | v = lec_get_idx(state, 1); |
| 965 | *pos += !!PTR_ERR(v); |
| 966 | return v; |
| 967 | } |
| 968 | |
| 969 | static int lec_seq_show(struct seq_file *seq, void *v) |
| 970 | { |
| 971 | static const char lec_banner[] = |
| 972 | "Itf MAC ATM destination" |
| 973 | " Status Flags " |
| 974 | "VPI/VCI Recv VPI/VCI\n"; |
| 975 | |
| 976 | if (v == SEQ_START_TOKEN) |
| 977 | seq_puts(seq, lec_banner); |
| 978 | else { |
| 979 | struct lec_state *state = seq->private; |
| 980 | struct net_device *dev = state->dev; |
| 981 | struct lec_arp_table *entry = hlist_entry(state->node, |
| 982 | struct lec_arp_table, |
| 983 | next); |
| 984 | |
| 985 | seq_printf(seq, "%s ", dev->name); |
| 986 | lec_info(seq, entry); |
| 987 | } |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | static const struct seq_operations lec_seq_ops = { |
| 992 | .start = lec_seq_start, |
| 993 | .next = lec_seq_next, |
| 994 | .stop = lec_seq_stop, |
| 995 | .show = lec_seq_show, |
| 996 | }; |
| 997 | |
| 998 | static int lec_seq_open(struct inode *inode, struct file *file) |
| 999 | { |
| 1000 | return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); |
| 1001 | } |
| 1002 | |
| 1003 | static const struct file_operations lec_seq_fops = { |
| 1004 | .owner = THIS_MODULE, |
| 1005 | .open = lec_seq_open, |
| 1006 | .read = seq_read, |
| 1007 | .llseek = seq_lseek, |
| 1008 | .release = seq_release_private, |
| 1009 | }; |
| 1010 | #endif |
| 1011 | |
| 1012 | static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1013 | { |
| 1014 | struct atm_vcc *vcc = ATM_SD(sock); |
| 1015 | int err = 0; |
| 1016 | |
| 1017 | switch (cmd) { |
| 1018 | case ATMLEC_CTRL: |
| 1019 | case ATMLEC_MCAST: |
| 1020 | case ATMLEC_DATA: |
| 1021 | if (!capable(CAP_NET_ADMIN)) |
| 1022 | return -EPERM; |
| 1023 | break; |
| 1024 | default: |
| 1025 | return -ENOIOCTLCMD; |
| 1026 | } |
| 1027 | |
| 1028 | switch (cmd) { |
| 1029 | case ATMLEC_CTRL: |
| 1030 | err = lecd_attach(vcc, (int)arg); |
| 1031 | if (err >= 0) |
| 1032 | sock->state = SS_CONNECTED; |
| 1033 | break; |
| 1034 | case ATMLEC_MCAST: |
| 1035 | err = lec_mcast_attach(vcc, (int)arg); |
| 1036 | break; |
| 1037 | case ATMLEC_DATA: |
| 1038 | err = lec_vcc_attach(vcc, (void __user *)arg); |
| 1039 | break; |
| 1040 | } |
| 1041 | |
| 1042 | return err; |
| 1043 | } |
| 1044 | |
| 1045 | static struct atm_ioctl lane_ioctl_ops = { |
| 1046 | .owner = THIS_MODULE, |
| 1047 | .ioctl = lane_ioctl, |
| 1048 | }; |
| 1049 | |
| 1050 | static int __init lane_module_init(void) |
| 1051 | { |
| 1052 | #ifdef CONFIG_PROC_FS |
| 1053 | struct proc_dir_entry *p; |
| 1054 | |
| 1055 | p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); |
| 1056 | if (!p) { |
| 1057 | pr_err("Unable to initialize /proc/net/atm/lec\n"); |
| 1058 | return -ENOMEM; |
| 1059 | } |
| 1060 | #endif |
| 1061 | |
| 1062 | register_atm_ioctl(&lane_ioctl_ops); |
| 1063 | pr_info("lec.c: initialized\n"); |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | static void __exit lane_module_cleanup(void) |
| 1068 | { |
| 1069 | int i; |
| 1070 | |
| 1071 | remove_proc_entry("lec", atm_proc_root); |
| 1072 | |
| 1073 | deregister_atm_ioctl(&lane_ioctl_ops); |
| 1074 | |
| 1075 | for (i = 0; i < MAX_LEC_ITF; i++) { |
| 1076 | if (dev_lec[i] != NULL) { |
| 1077 | unregister_netdev(dev_lec[i]); |
| 1078 | free_netdev(dev_lec[i]); |
| 1079 | dev_lec[i] = NULL; |
| 1080 | } |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | module_init(lane_module_init); |
| 1085 | module_exit(lane_module_cleanup); |
| 1086 | |
| 1087 | /* |
| 1088 | * LANE2: 3.1.3, LE_RESOLVE.request |
| 1089 | * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. |
| 1090 | * If sizeoftlvs == NULL the default TLVs associated with with this |
| 1091 | * lec will be used. |
| 1092 | * If dst_mac == NULL, targetless LE_ARP will be sent |
| 1093 | */ |
| 1094 | static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, |
| 1095 | u8 **tlvs, u32 *sizeoftlvs) |
| 1096 | { |
| 1097 | unsigned long flags; |
| 1098 | struct lec_priv *priv = netdev_priv(dev); |
| 1099 | struct lec_arp_table *table; |
| 1100 | struct sk_buff *skb; |
| 1101 | int retval; |
| 1102 | |
| 1103 | if (force == 0) { |
| 1104 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1105 | table = lec_arp_find(priv, dst_mac); |
| 1106 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1107 | if (table == NULL) |
| 1108 | return -1; |
| 1109 | |
| 1110 | *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); |
| 1111 | if (*tlvs == NULL) |
| 1112 | return -1; |
| 1113 | |
| 1114 | *sizeoftlvs = table->sizeoftlvs; |
| 1115 | |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | if (sizeoftlvs == NULL) |
| 1120 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); |
| 1121 | |
| 1122 | else { |
| 1123 | skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); |
| 1124 | if (skb == NULL) |
| 1125 | return -1; |
| 1126 | skb->len = *sizeoftlvs; |
| 1127 | skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); |
| 1128 | retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); |
| 1129 | } |
| 1130 | return retval; |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * LANE2: 3.1.4, LE_ASSOCIATE.request |
| 1135 | * Associate the *tlvs with the *lan_dst address. |
| 1136 | * Will overwrite any previous association |
| 1137 | * Returns 1 for success, 0 for failure (out of memory) |
| 1138 | * |
| 1139 | */ |
| 1140 | static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, |
| 1141 | const u8 *tlvs, u32 sizeoftlvs) |
| 1142 | { |
| 1143 | int retval; |
| 1144 | struct sk_buff *skb; |
| 1145 | struct lec_priv *priv = netdev_priv(dev); |
| 1146 | |
| 1147 | if (!ether_addr_equal(lan_dst, dev->dev_addr)) |
| 1148 | return 0; /* not our mac address */ |
| 1149 | |
| 1150 | kfree(priv->tlvs); /* NULL if there was no previous association */ |
| 1151 | |
| 1152 | priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
| 1153 | if (priv->tlvs == NULL) |
| 1154 | return 0; |
| 1155 | priv->sizeoftlvs = sizeoftlvs; |
| 1156 | |
| 1157 | skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); |
| 1158 | if (skb == NULL) |
| 1159 | return 0; |
| 1160 | skb->len = sizeoftlvs; |
| 1161 | skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); |
| 1162 | retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); |
| 1163 | if (retval != 0) |
| 1164 | pr_info("lec.c: lane2_associate_req() failed\n"); |
| 1165 | /* |
| 1166 | * If the previous association has changed we must |
| 1167 | * somehow notify other LANE entities about the change |
| 1168 | */ |
| 1169 | return 1; |
| 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * LANE2: 3.1.5, LE_ASSOCIATE.indication |
| 1174 | * |
| 1175 | */ |
| 1176 | static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, |
| 1177 | const u8 *tlvs, u32 sizeoftlvs) |
| 1178 | { |
| 1179 | #if 0 |
| 1180 | int i = 0; |
| 1181 | #endif |
| 1182 | struct lec_priv *priv = netdev_priv(dev); |
| 1183 | #if 0 /* |
| 1184 | * Why have the TLVs in LE_ARP entries |
| 1185 | * since we do not use them? When you |
| 1186 | * uncomment this code, make sure the |
| 1187 | * TLVs get freed when entry is killed |
| 1188 | */ |
| 1189 | struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); |
| 1190 | |
| 1191 | if (entry == NULL) |
| 1192 | return; /* should not happen */ |
| 1193 | |
| 1194 | kfree(entry->tlvs); |
| 1195 | |
| 1196 | entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); |
| 1197 | if (entry->tlvs == NULL) |
| 1198 | return; |
| 1199 | entry->sizeoftlvs = sizeoftlvs; |
| 1200 | #endif |
| 1201 | #if 0 |
| 1202 | pr_info("\n"); |
| 1203 | pr_info("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); |
| 1204 | while (i < sizeoftlvs) |
| 1205 | pr_cont("%02x ", tlvs[i++]); |
| 1206 | |
| 1207 | pr_cont("\n"); |
| 1208 | #endif |
| 1209 | |
| 1210 | /* tell MPOA about the TLVs we saw */ |
| 1211 | if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { |
| 1212 | priv->lane2_ops->associate_indicator(dev, mac_addr, |
| 1213 | tlvs, sizeoftlvs); |
| 1214 | } |
| 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * Here starts what used to lec_arpc.c |
| 1219 | * |
| 1220 | * lec_arpc.c was added here when making |
| 1221 | * lane client modular. October 1997 |
| 1222 | */ |
| 1223 | |
| 1224 | #include <linux/types.h> |
| 1225 | #include <linux/timer.h> |
| 1226 | #include <linux/param.h> |
| 1227 | #include <linux/atomic.h> |
| 1228 | #include <linux/inetdevice.h> |
| 1229 | #include <net/route.h> |
| 1230 | |
| 1231 | #if 0 |
| 1232 | #define pr_debug(format, args...) |
| 1233 | /* |
| 1234 | #define pr_debug printk |
| 1235 | */ |
| 1236 | #endif |
| 1237 | #define DEBUG_ARP_TABLE 0 |
| 1238 | |
| 1239 | #define LEC_ARP_REFRESH_INTERVAL (3*HZ) |
| 1240 | |
| 1241 | static void lec_arp_check_expire(struct work_struct *work); |
| 1242 | static void lec_arp_expire_arp(unsigned long data); |
| 1243 | |
| 1244 | /* |
| 1245 | * Arp table funcs |
| 1246 | */ |
| 1247 | |
| 1248 | #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE - 1)) |
| 1249 | |
| 1250 | /* |
| 1251 | * Initialization of arp-cache |
| 1252 | */ |
| 1253 | static void lec_arp_init(struct lec_priv *priv) |
| 1254 | { |
| 1255 | unsigned short i; |
| 1256 | |
| 1257 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
| 1258 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
| 1259 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
| 1260 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
| 1261 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
| 1262 | spin_lock_init(&priv->lec_arp_lock); |
| 1263 | INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); |
| 1264 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
| 1265 | } |
| 1266 | |
| 1267 | static void lec_arp_clear_vccs(struct lec_arp_table *entry) |
| 1268 | { |
| 1269 | if (entry->vcc) { |
| 1270 | struct atm_vcc *vcc = entry->vcc; |
| 1271 | struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); |
| 1272 | struct net_device *dev = (struct net_device *)vcc->proto_data; |
| 1273 | |
| 1274 | vcc->pop = vpriv->old_pop; |
| 1275 | if (vpriv->xoff) |
| 1276 | netif_wake_queue(dev); |
| 1277 | kfree(vpriv); |
| 1278 | vcc->user_back = NULL; |
| 1279 | vcc->push = entry->old_push; |
| 1280 | vcc_release_async(vcc, -EPIPE); |
| 1281 | entry->vcc = NULL; |
| 1282 | } |
| 1283 | if (entry->recv_vcc) { |
| 1284 | entry->recv_vcc->push = entry->old_recv_push; |
| 1285 | vcc_release_async(entry->recv_vcc, -EPIPE); |
| 1286 | entry->recv_vcc = NULL; |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | /* |
| 1291 | * Insert entry to lec_arp_table |
| 1292 | * LANE2: Add to the end of the list to satisfy 8.1.13 |
| 1293 | */ |
| 1294 | static inline void |
| 1295 | lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) |
| 1296 | { |
| 1297 | struct hlist_head *tmp; |
| 1298 | |
| 1299 | tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; |
| 1300 | hlist_add_head(&entry->next, tmp); |
| 1301 | |
| 1302 | pr_debug("Added entry:%pM\n", entry->mac_addr); |
| 1303 | } |
| 1304 | |
| 1305 | /* |
| 1306 | * Remove entry from lec_arp_table |
| 1307 | */ |
| 1308 | static int |
| 1309 | lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) |
| 1310 | { |
| 1311 | struct lec_arp_table *entry; |
| 1312 | int i, remove_vcc = 1; |
| 1313 | |
| 1314 | if (!to_remove) |
| 1315 | return -1; |
| 1316 | |
| 1317 | hlist_del(&to_remove->next); |
| 1318 | del_timer(&to_remove->timer); |
| 1319 | |
| 1320 | /* |
| 1321 | * If this is the only MAC connected to this VCC, |
| 1322 | * also tear down the VCC |
| 1323 | */ |
| 1324 | if (to_remove->status >= ESI_FLUSH_PENDING) { |
| 1325 | /* |
| 1326 | * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT |
| 1327 | */ |
| 1328 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1329 | hlist_for_each_entry(entry, |
| 1330 | &priv->lec_arp_tables[i], next) { |
| 1331 | if (memcmp(to_remove->atm_addr, |
| 1332 | entry->atm_addr, ATM_ESA_LEN) == 0) { |
| 1333 | remove_vcc = 0; |
| 1334 | break; |
| 1335 | } |
| 1336 | } |
| 1337 | } |
| 1338 | if (remove_vcc) |
| 1339 | lec_arp_clear_vccs(to_remove); |
| 1340 | } |
| 1341 | skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ |
| 1342 | |
| 1343 | pr_debug("Removed entry:%pM\n", to_remove->mac_addr); |
| 1344 | return 0; |
| 1345 | } |
| 1346 | |
| 1347 | #if DEBUG_ARP_TABLE |
| 1348 | static const char *get_status_string(unsigned char st) |
| 1349 | { |
| 1350 | switch (st) { |
| 1351 | case ESI_UNKNOWN: |
| 1352 | return "ESI_UNKNOWN"; |
| 1353 | case ESI_ARP_PENDING: |
| 1354 | return "ESI_ARP_PENDING"; |
| 1355 | case ESI_VC_PENDING: |
| 1356 | return "ESI_VC_PENDING"; |
| 1357 | case ESI_FLUSH_PENDING: |
| 1358 | return "ESI_FLUSH_PENDING"; |
| 1359 | case ESI_FORWARD_DIRECT: |
| 1360 | return "ESI_FORWARD_DIRECT"; |
| 1361 | } |
| 1362 | return "<UNKNOWN>"; |
| 1363 | } |
| 1364 | |
| 1365 | static void dump_arp_table(struct lec_priv *priv) |
| 1366 | { |
| 1367 | struct lec_arp_table *rulla; |
| 1368 | char buf[256]; |
| 1369 | int i, j, offset; |
| 1370 | |
| 1371 | pr_info("Dump %p:\n", priv); |
| 1372 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1373 | hlist_for_each_entry(rulla, |
| 1374 | &priv->lec_arp_tables[i], next) { |
| 1375 | offset = 0; |
| 1376 | offset += sprintf(buf, "%d: %p\n", i, rulla); |
| 1377 | offset += sprintf(buf + offset, "Mac: %pM", |
| 1378 | rulla->mac_addr); |
| 1379 | offset += sprintf(buf + offset, " Atm:"); |
| 1380 | for (j = 0; j < ATM_ESA_LEN; j++) { |
| 1381 | offset += sprintf(buf + offset, |
| 1382 | "%2.2x ", |
| 1383 | rulla->atm_addr[j] & 0xff); |
| 1384 | } |
| 1385 | offset += sprintf(buf + offset, |
| 1386 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1387 | rulla->vcc ? rulla->vcc->vpi : 0, |
| 1388 | rulla->vcc ? rulla->vcc->vci : 0, |
| 1389 | rulla->recv_vcc ? rulla->recv_vcc-> |
| 1390 | vpi : 0, |
| 1391 | rulla->recv_vcc ? rulla->recv_vcc-> |
| 1392 | vci : 0, rulla->last_used, |
| 1393 | rulla->timestamp, rulla->no_tries); |
| 1394 | offset += |
| 1395 | sprintf(buf + offset, |
| 1396 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1397 | rulla->flags, rulla->packets_flooded, |
| 1398 | get_status_string(rulla->status)); |
| 1399 | pr_info("%s\n", buf); |
| 1400 | } |
| 1401 | } |
| 1402 | |
| 1403 | if (!hlist_empty(&priv->lec_no_forward)) |
| 1404 | pr_info("No forward\n"); |
| 1405 | hlist_for_each_entry(rulla, &priv->lec_no_forward, next) { |
| 1406 | offset = 0; |
| 1407 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
| 1408 | offset += sprintf(buf + offset, " Atm:"); |
| 1409 | for (j = 0; j < ATM_ESA_LEN; j++) { |
| 1410 | offset += sprintf(buf + offset, "%2.2x ", |
| 1411 | rulla->atm_addr[j] & 0xff); |
| 1412 | } |
| 1413 | offset += sprintf(buf + offset, |
| 1414 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1415 | rulla->vcc ? rulla->vcc->vpi : 0, |
| 1416 | rulla->vcc ? rulla->vcc->vci : 0, |
| 1417 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
| 1418 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
| 1419 | rulla->last_used, |
| 1420 | rulla->timestamp, rulla->no_tries); |
| 1421 | offset += sprintf(buf + offset, |
| 1422 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1423 | rulla->flags, rulla->packets_flooded, |
| 1424 | get_status_string(rulla->status)); |
| 1425 | pr_info("%s\n", buf); |
| 1426 | } |
| 1427 | |
| 1428 | if (!hlist_empty(&priv->lec_arp_empty_ones)) |
| 1429 | pr_info("Empty ones\n"); |
| 1430 | hlist_for_each_entry(rulla, &priv->lec_arp_empty_ones, next) { |
| 1431 | offset = 0; |
| 1432 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
| 1433 | offset += sprintf(buf + offset, " Atm:"); |
| 1434 | for (j = 0; j < ATM_ESA_LEN; j++) { |
| 1435 | offset += sprintf(buf + offset, "%2.2x ", |
| 1436 | rulla->atm_addr[j] & 0xff); |
| 1437 | } |
| 1438 | offset += sprintf(buf + offset, |
| 1439 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1440 | rulla->vcc ? rulla->vcc->vpi : 0, |
| 1441 | rulla->vcc ? rulla->vcc->vci : 0, |
| 1442 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
| 1443 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
| 1444 | rulla->last_used, |
| 1445 | rulla->timestamp, rulla->no_tries); |
| 1446 | offset += sprintf(buf + offset, |
| 1447 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1448 | rulla->flags, rulla->packets_flooded, |
| 1449 | get_status_string(rulla->status)); |
| 1450 | pr_info("%s", buf); |
| 1451 | } |
| 1452 | |
| 1453 | if (!hlist_empty(&priv->mcast_fwds)) |
| 1454 | pr_info("Multicast Forward VCCs\n"); |
| 1455 | hlist_for_each_entry(rulla, &priv->mcast_fwds, next) { |
| 1456 | offset = 0; |
| 1457 | offset += sprintf(buf + offset, "Mac: %pM", rulla->mac_addr); |
| 1458 | offset += sprintf(buf + offset, " Atm:"); |
| 1459 | for (j = 0; j < ATM_ESA_LEN; j++) { |
| 1460 | offset += sprintf(buf + offset, "%2.2x ", |
| 1461 | rulla->atm_addr[j] & 0xff); |
| 1462 | } |
| 1463 | offset += sprintf(buf + offset, |
| 1464 | "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", |
| 1465 | rulla->vcc ? rulla->vcc->vpi : 0, |
| 1466 | rulla->vcc ? rulla->vcc->vci : 0, |
| 1467 | rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, |
| 1468 | rulla->recv_vcc ? rulla->recv_vcc->vci : 0, |
| 1469 | rulla->last_used, |
| 1470 | rulla->timestamp, rulla->no_tries); |
| 1471 | offset += sprintf(buf + offset, |
| 1472 | "Flags:%x, Packets_flooded:%x, Status: %s ", |
| 1473 | rulla->flags, rulla->packets_flooded, |
| 1474 | get_status_string(rulla->status)); |
| 1475 | pr_info("%s\n", buf); |
| 1476 | } |
| 1477 | |
| 1478 | } |
| 1479 | #else |
| 1480 | #define dump_arp_table(priv) do { } while (0) |
| 1481 | #endif |
| 1482 | |
| 1483 | /* |
| 1484 | * Destruction of arp-cache |
| 1485 | */ |
| 1486 | static void lec_arp_destroy(struct lec_priv *priv) |
| 1487 | { |
| 1488 | unsigned long flags; |
| 1489 | struct hlist_node *next; |
| 1490 | struct lec_arp_table *entry; |
| 1491 | int i; |
| 1492 | |
| 1493 | cancel_delayed_work_sync(&priv->lec_arp_work); |
| 1494 | |
| 1495 | /* |
| 1496 | * Remove all entries |
| 1497 | */ |
| 1498 | |
| 1499 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1500 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1501 | hlist_for_each_entry_safe(entry, next, |
| 1502 | &priv->lec_arp_tables[i], next) { |
| 1503 | lec_arp_remove(priv, entry); |
| 1504 | lec_arp_put(entry); |
| 1505 | } |
| 1506 | INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); |
| 1507 | } |
| 1508 | |
| 1509 | hlist_for_each_entry_safe(entry, next, |
| 1510 | &priv->lec_arp_empty_ones, next) { |
| 1511 | del_timer_sync(&entry->timer); |
| 1512 | lec_arp_clear_vccs(entry); |
| 1513 | hlist_del(&entry->next); |
| 1514 | lec_arp_put(entry); |
| 1515 | } |
| 1516 | INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); |
| 1517 | |
| 1518 | hlist_for_each_entry_safe(entry, next, |
| 1519 | &priv->lec_no_forward, next) { |
| 1520 | del_timer_sync(&entry->timer); |
| 1521 | lec_arp_clear_vccs(entry); |
| 1522 | hlist_del(&entry->next); |
| 1523 | lec_arp_put(entry); |
| 1524 | } |
| 1525 | INIT_HLIST_HEAD(&priv->lec_no_forward); |
| 1526 | |
| 1527 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
| 1528 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 1529 | lec_arp_clear_vccs(entry); |
| 1530 | hlist_del(&entry->next); |
| 1531 | lec_arp_put(entry); |
| 1532 | } |
| 1533 | INIT_HLIST_HEAD(&priv->mcast_fwds); |
| 1534 | priv->mcast_vcc = NULL; |
| 1535 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1536 | } |
| 1537 | |
| 1538 | /* |
| 1539 | * Find entry by mac_address |
| 1540 | */ |
| 1541 | static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, |
| 1542 | const unsigned char *mac_addr) |
| 1543 | { |
| 1544 | struct hlist_head *head; |
| 1545 | struct lec_arp_table *entry; |
| 1546 | |
| 1547 | pr_debug("%pM\n", mac_addr); |
| 1548 | |
| 1549 | head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; |
| 1550 | hlist_for_each_entry(entry, head, next) { |
| 1551 | if (ether_addr_equal(mac_addr, entry->mac_addr)) |
| 1552 | return entry; |
| 1553 | } |
| 1554 | return NULL; |
| 1555 | } |
| 1556 | |
| 1557 | static struct lec_arp_table *make_entry(struct lec_priv *priv, |
| 1558 | const unsigned char *mac_addr) |
| 1559 | { |
| 1560 | struct lec_arp_table *to_return; |
| 1561 | |
| 1562 | to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); |
| 1563 | if (!to_return) { |
| 1564 | pr_info("LEC: Arp entry kmalloc failed\n"); |
| 1565 | return NULL; |
| 1566 | } |
| 1567 | ether_addr_copy(to_return->mac_addr, mac_addr); |
| 1568 | INIT_HLIST_NODE(&to_return->next); |
| 1569 | setup_timer(&to_return->timer, lec_arp_expire_arp, |
| 1570 | (unsigned long)to_return); |
| 1571 | to_return->last_used = jiffies; |
| 1572 | to_return->priv = priv; |
| 1573 | skb_queue_head_init(&to_return->tx_wait); |
| 1574 | atomic_set(&to_return->usage, 1); |
| 1575 | return to_return; |
| 1576 | } |
| 1577 | |
| 1578 | /* Arp sent timer expired */ |
| 1579 | static void lec_arp_expire_arp(unsigned long data) |
| 1580 | { |
| 1581 | struct lec_arp_table *entry; |
| 1582 | |
| 1583 | entry = (struct lec_arp_table *)data; |
| 1584 | |
| 1585 | pr_debug("\n"); |
| 1586 | if (entry->status == ESI_ARP_PENDING) { |
| 1587 | if (entry->no_tries <= entry->priv->max_retry_count) { |
| 1588 | if (entry->is_rdesc) |
| 1589 | send_to_lecd(entry->priv, l_rdesc_arp_xmt, |
| 1590 | entry->mac_addr, NULL, NULL); |
| 1591 | else |
| 1592 | send_to_lecd(entry->priv, l_arp_xmt, |
| 1593 | entry->mac_addr, NULL, NULL); |
| 1594 | entry->no_tries++; |
| 1595 | } |
| 1596 | mod_timer(&entry->timer, jiffies + (1 * HZ)); |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | /* Unknown/unused vcc expire, remove associated entry */ |
| 1601 | static void lec_arp_expire_vcc(unsigned long data) |
| 1602 | { |
| 1603 | unsigned long flags; |
| 1604 | struct lec_arp_table *to_remove = (struct lec_arp_table *)data; |
| 1605 | struct lec_priv *priv = to_remove->priv; |
| 1606 | |
| 1607 | del_timer(&to_remove->timer); |
| 1608 | |
| 1609 | pr_debug("%p %p: vpi:%d vci:%d\n", |
| 1610 | to_remove, priv, |
| 1611 | to_remove->vcc ? to_remove->recv_vcc->vpi : 0, |
| 1612 | to_remove->vcc ? to_remove->recv_vcc->vci : 0); |
| 1613 | |
| 1614 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1615 | hlist_del(&to_remove->next); |
| 1616 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1617 | |
| 1618 | lec_arp_clear_vccs(to_remove); |
| 1619 | lec_arp_put(to_remove); |
| 1620 | } |
| 1621 | |
| 1622 | static bool __lec_arp_check_expire(struct lec_arp_table *entry, |
| 1623 | unsigned long now, |
| 1624 | struct lec_priv *priv) |
| 1625 | { |
| 1626 | unsigned long time_to_check; |
| 1627 | |
| 1628 | if ((entry->flags) & LEC_REMOTE_FLAG && priv->topology_change) |
| 1629 | time_to_check = priv->forward_delay_time; |
| 1630 | else |
| 1631 | time_to_check = priv->aging_time; |
| 1632 | |
| 1633 | pr_debug("About to expire: %lx - %lx > %lx\n", |
| 1634 | now, entry->last_used, time_to_check); |
| 1635 | if (time_after(now, entry->last_used + time_to_check) && |
| 1636 | !(entry->flags & LEC_PERMANENT_FLAG) && |
| 1637 | !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ |
| 1638 | /* Remove entry */ |
| 1639 | pr_debug("Entry timed out\n"); |
| 1640 | lec_arp_remove(priv, entry); |
| 1641 | lec_arp_put(entry); |
| 1642 | } else { |
| 1643 | /* Something else */ |
| 1644 | if ((entry->status == ESI_VC_PENDING || |
| 1645 | entry->status == ESI_ARP_PENDING) && |
| 1646 | time_after_eq(now, entry->timestamp + |
| 1647 | priv->max_unknown_frame_time)) { |
| 1648 | entry->timestamp = jiffies; |
| 1649 | entry->packets_flooded = 0; |
| 1650 | if (entry->status == ESI_VC_PENDING) |
| 1651 | send_to_lecd(priv, l_svc_setup, |
| 1652 | entry->mac_addr, |
| 1653 | entry->atm_addr, |
| 1654 | NULL); |
| 1655 | } |
| 1656 | if (entry->status == ESI_FLUSH_PENDING && |
| 1657 | time_after_eq(now, entry->timestamp + |
| 1658 | priv->path_switching_delay)) { |
| 1659 | lec_arp_hold(entry); |
| 1660 | return true; |
| 1661 | } |
| 1662 | } |
| 1663 | |
| 1664 | return false; |
| 1665 | } |
| 1666 | /* |
| 1667 | * Expire entries. |
| 1668 | * 1. Re-set timer |
| 1669 | * 2. For each entry, delete entries that have aged past the age limit. |
| 1670 | * 3. For each entry, depending on the status of the entry, perform |
| 1671 | * the following maintenance. |
| 1672 | * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the |
| 1673 | * tick_count is above the max_unknown_frame_time, clear |
| 1674 | * the tick_count to zero and clear the packets_flooded counter |
| 1675 | * to zero. This supports the packet rate limit per address |
| 1676 | * while flooding unknowns. |
| 1677 | * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater |
| 1678 | * than or equal to the path_switching_delay, change the status |
| 1679 | * to ESI_FORWARD_DIRECT. This causes the flush period to end |
| 1680 | * regardless of the progress of the flush protocol. |
| 1681 | */ |
| 1682 | static void lec_arp_check_expire(struct work_struct *work) |
| 1683 | { |
| 1684 | unsigned long flags; |
| 1685 | struct lec_priv *priv = |
| 1686 | container_of(work, struct lec_priv, lec_arp_work.work); |
| 1687 | struct hlist_node *next; |
| 1688 | struct lec_arp_table *entry; |
| 1689 | unsigned long now; |
| 1690 | int i; |
| 1691 | |
| 1692 | pr_debug("%p\n", priv); |
| 1693 | now = jiffies; |
| 1694 | restart: |
| 1695 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1696 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1697 | hlist_for_each_entry_safe(entry, next, |
| 1698 | &priv->lec_arp_tables[i], next) { |
| 1699 | if (__lec_arp_check_expire(entry, now, priv)) { |
| 1700 | struct sk_buff *skb; |
| 1701 | struct atm_vcc *vcc = entry->vcc; |
| 1702 | |
| 1703 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
| 1704 | flags); |
| 1705 | while ((skb = skb_dequeue(&entry->tx_wait))) |
| 1706 | lec_send(vcc, skb); |
| 1707 | entry->last_used = jiffies; |
| 1708 | entry->status = ESI_FORWARD_DIRECT; |
| 1709 | lec_arp_put(entry); |
| 1710 | |
| 1711 | goto restart; |
| 1712 | } |
| 1713 | } |
| 1714 | } |
| 1715 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1716 | |
| 1717 | schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); |
| 1718 | } |
| 1719 | |
| 1720 | /* |
| 1721 | * Try to find vcc where mac_address is attached. |
| 1722 | * |
| 1723 | */ |
| 1724 | static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, |
| 1725 | const unsigned char *mac_to_find, |
| 1726 | int is_rdesc, |
| 1727 | struct lec_arp_table **ret_entry) |
| 1728 | { |
| 1729 | unsigned long flags; |
| 1730 | struct lec_arp_table *entry; |
| 1731 | struct atm_vcc *found; |
| 1732 | |
| 1733 | if (mac_to_find[0] & 0x01) { |
| 1734 | switch (priv->lane_version) { |
| 1735 | case 1: |
| 1736 | return priv->mcast_vcc; |
| 1737 | case 2: /* LANE2 wants arp for multicast addresses */ |
| 1738 | if (ether_addr_equal(mac_to_find, bus_mac)) |
| 1739 | return priv->mcast_vcc; |
| 1740 | break; |
| 1741 | default: |
| 1742 | break; |
| 1743 | } |
| 1744 | } |
| 1745 | |
| 1746 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1747 | entry = lec_arp_find(priv, mac_to_find); |
| 1748 | |
| 1749 | if (entry) { |
| 1750 | if (entry->status == ESI_FORWARD_DIRECT) { |
| 1751 | /* Connection Ok */ |
| 1752 | entry->last_used = jiffies; |
| 1753 | lec_arp_hold(entry); |
| 1754 | *ret_entry = entry; |
| 1755 | found = entry->vcc; |
| 1756 | goto out; |
| 1757 | } |
| 1758 | /* |
| 1759 | * If the LE_ARP cache entry is still pending, reset count to 0 |
| 1760 | * so another LE_ARP request can be made for this frame. |
| 1761 | */ |
| 1762 | if (entry->status == ESI_ARP_PENDING) |
| 1763 | entry->no_tries = 0; |
| 1764 | /* |
| 1765 | * Data direct VC not yet set up, check to see if the unknown |
| 1766 | * frame count is greater than the limit. If the limit has |
| 1767 | * not been reached, allow the caller to send packet to |
| 1768 | * BUS. |
| 1769 | */ |
| 1770 | if (entry->status != ESI_FLUSH_PENDING && |
| 1771 | entry->packets_flooded < |
| 1772 | priv->maximum_unknown_frame_count) { |
| 1773 | entry->packets_flooded++; |
| 1774 | pr_debug("Flooding..\n"); |
| 1775 | found = priv->mcast_vcc; |
| 1776 | goto out; |
| 1777 | } |
| 1778 | /* |
| 1779 | * We got here because entry->status == ESI_FLUSH_PENDING |
| 1780 | * or BUS flood limit was reached for an entry which is |
| 1781 | * in ESI_ARP_PENDING or ESI_VC_PENDING state. |
| 1782 | */ |
| 1783 | lec_arp_hold(entry); |
| 1784 | *ret_entry = entry; |
| 1785 | pr_debug("entry->status %d entry->vcc %p\n", entry->status, |
| 1786 | entry->vcc); |
| 1787 | found = NULL; |
| 1788 | } else { |
| 1789 | /* No matching entry was found */ |
| 1790 | entry = make_entry(priv, mac_to_find); |
| 1791 | pr_debug("Making entry\n"); |
| 1792 | if (!entry) { |
| 1793 | found = priv->mcast_vcc; |
| 1794 | goto out; |
| 1795 | } |
| 1796 | lec_arp_add(priv, entry); |
| 1797 | /* We want arp-request(s) to be sent */ |
| 1798 | entry->packets_flooded = 1; |
| 1799 | entry->status = ESI_ARP_PENDING; |
| 1800 | entry->no_tries = 1; |
| 1801 | entry->last_used = entry->timestamp = jiffies; |
| 1802 | entry->is_rdesc = is_rdesc; |
| 1803 | if (entry->is_rdesc) |
| 1804 | send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, |
| 1805 | NULL); |
| 1806 | else |
| 1807 | send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); |
| 1808 | entry->timer.expires = jiffies + (1 * HZ); |
| 1809 | entry->timer.function = lec_arp_expire_arp; |
| 1810 | add_timer(&entry->timer); |
| 1811 | found = priv->mcast_vcc; |
| 1812 | } |
| 1813 | |
| 1814 | out: |
| 1815 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1816 | return found; |
| 1817 | } |
| 1818 | |
| 1819 | static int |
| 1820 | lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, |
| 1821 | unsigned long permanent) |
| 1822 | { |
| 1823 | unsigned long flags; |
| 1824 | struct hlist_node *next; |
| 1825 | struct lec_arp_table *entry; |
| 1826 | int i; |
| 1827 | |
| 1828 | pr_debug("\n"); |
| 1829 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1830 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1831 | hlist_for_each_entry_safe(entry, next, |
| 1832 | &priv->lec_arp_tables[i], next) { |
| 1833 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) && |
| 1834 | (permanent || |
| 1835 | !(entry->flags & LEC_PERMANENT_FLAG))) { |
| 1836 | lec_arp_remove(priv, entry); |
| 1837 | lec_arp_put(entry); |
| 1838 | } |
| 1839 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1840 | return 0; |
| 1841 | } |
| 1842 | } |
| 1843 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1844 | return -1; |
| 1845 | } |
| 1846 | |
| 1847 | /* |
| 1848 | * Notifies: Response to arp_request (atm_addr != NULL) |
| 1849 | */ |
| 1850 | static void |
| 1851 | lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, |
| 1852 | const unsigned char *atm_addr, unsigned long remoteflag, |
| 1853 | unsigned int targetless_le_arp) |
| 1854 | { |
| 1855 | unsigned long flags; |
| 1856 | struct hlist_node *next; |
| 1857 | struct lec_arp_table *entry, *tmp; |
| 1858 | int i; |
| 1859 | |
| 1860 | pr_debug("%smac:%pM\n", |
| 1861 | (targetless_le_arp) ? "targetless " : "", mac_addr); |
| 1862 | |
| 1863 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1864 | entry = lec_arp_find(priv, mac_addr); |
| 1865 | if (entry == NULL && targetless_le_arp) |
| 1866 | goto out; /* |
| 1867 | * LANE2: ignore targetless LE_ARPs for which |
| 1868 | * we have no entry in the cache. 7.1.30 |
| 1869 | */ |
| 1870 | if (!hlist_empty(&priv->lec_arp_empty_ones)) { |
| 1871 | hlist_for_each_entry_safe(entry, next, |
| 1872 | &priv->lec_arp_empty_ones, next) { |
| 1873 | if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { |
| 1874 | hlist_del(&entry->next); |
| 1875 | del_timer(&entry->timer); |
| 1876 | tmp = lec_arp_find(priv, mac_addr); |
| 1877 | if (tmp) { |
| 1878 | del_timer(&tmp->timer); |
| 1879 | tmp->status = ESI_FORWARD_DIRECT; |
| 1880 | memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); |
| 1881 | tmp->vcc = entry->vcc; |
| 1882 | tmp->old_push = entry->old_push; |
| 1883 | tmp->last_used = jiffies; |
| 1884 | del_timer(&entry->timer); |
| 1885 | lec_arp_put(entry); |
| 1886 | entry = tmp; |
| 1887 | } else { |
| 1888 | entry->status = ESI_FORWARD_DIRECT; |
| 1889 | ether_addr_copy(entry->mac_addr, |
| 1890 | mac_addr); |
| 1891 | entry->last_used = jiffies; |
| 1892 | lec_arp_add(priv, entry); |
| 1893 | } |
| 1894 | if (remoteflag) |
| 1895 | entry->flags |= LEC_REMOTE_FLAG; |
| 1896 | else |
| 1897 | entry->flags &= ~LEC_REMOTE_FLAG; |
| 1898 | pr_debug("After update\n"); |
| 1899 | dump_arp_table(priv); |
| 1900 | goto out; |
| 1901 | } |
| 1902 | } |
| 1903 | } |
| 1904 | |
| 1905 | entry = lec_arp_find(priv, mac_addr); |
| 1906 | if (!entry) { |
| 1907 | entry = make_entry(priv, mac_addr); |
| 1908 | if (!entry) |
| 1909 | goto out; |
| 1910 | entry->status = ESI_UNKNOWN; |
| 1911 | lec_arp_add(priv, entry); |
| 1912 | /* Temporary, changes before end of function */ |
| 1913 | } |
| 1914 | memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); |
| 1915 | del_timer(&entry->timer); |
| 1916 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 1917 | hlist_for_each_entry(tmp, |
| 1918 | &priv->lec_arp_tables[i], next) { |
| 1919 | if (entry != tmp && |
| 1920 | !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { |
| 1921 | /* Vcc to this host exists */ |
| 1922 | if (tmp->status > ESI_VC_PENDING) { |
| 1923 | /* |
| 1924 | * ESI_FLUSH_PENDING, |
| 1925 | * ESI_FORWARD_DIRECT |
| 1926 | */ |
| 1927 | entry->vcc = tmp->vcc; |
| 1928 | entry->old_push = tmp->old_push; |
| 1929 | } |
| 1930 | entry->status = tmp->status; |
| 1931 | break; |
| 1932 | } |
| 1933 | } |
| 1934 | } |
| 1935 | if (remoteflag) |
| 1936 | entry->flags |= LEC_REMOTE_FLAG; |
| 1937 | else |
| 1938 | entry->flags &= ~LEC_REMOTE_FLAG; |
| 1939 | if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { |
| 1940 | entry->status = ESI_VC_PENDING; |
| 1941 | send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); |
| 1942 | } |
| 1943 | pr_debug("After update2\n"); |
| 1944 | dump_arp_table(priv); |
| 1945 | out: |
| 1946 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 1947 | } |
| 1948 | |
| 1949 | /* |
| 1950 | * Notifies: Vcc setup ready |
| 1951 | */ |
| 1952 | static void |
| 1953 | lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, |
| 1954 | struct atm_vcc *vcc, |
| 1955 | void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) |
| 1956 | { |
| 1957 | unsigned long flags; |
| 1958 | struct lec_arp_table *entry; |
| 1959 | int i, found_entry = 0; |
| 1960 | |
| 1961 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 1962 | /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 1963 | if (ioc_data->receive == 2) { |
| 1964 | pr_debug("LEC_ARP: Attaching mcast forward\n"); |
| 1965 | #if 0 |
| 1966 | entry = lec_arp_find(priv, bus_mac); |
| 1967 | if (!entry) { |
| 1968 | pr_info("LEC_ARP: Multicast entry not found!\n"); |
| 1969 | goto out; |
| 1970 | } |
| 1971 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 1972 | entry->recv_vcc = vcc; |
| 1973 | entry->old_recv_push = old_push; |
| 1974 | #endif |
| 1975 | entry = make_entry(priv, bus_mac); |
| 1976 | if (entry == NULL) |
| 1977 | goto out; |
| 1978 | del_timer(&entry->timer); |
| 1979 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 1980 | entry->recv_vcc = vcc; |
| 1981 | entry->old_recv_push = old_push; |
| 1982 | hlist_add_head(&entry->next, &priv->mcast_fwds); |
| 1983 | goto out; |
| 1984 | } else if (ioc_data->receive == 1) { |
| 1985 | /* |
| 1986 | * Vcc which we don't want to make default vcc, |
| 1987 | * attach it anyway. |
| 1988 | */ |
| 1989 | pr_debug("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", |
| 1990 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
| 1991 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
| 1992 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
| 1993 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
| 1994 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
| 1995 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
| 1996 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
| 1997 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
| 1998 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
| 1999 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
| 2000 | entry = make_entry(priv, bus_mac); |
| 2001 | if (entry == NULL) |
| 2002 | goto out; |
| 2003 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2004 | eth_zero_addr(entry->mac_addr); |
| 2005 | entry->recv_vcc = vcc; |
| 2006 | entry->old_recv_push = old_push; |
| 2007 | entry->status = ESI_UNKNOWN; |
| 2008 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
| 2009 | entry->timer.function = lec_arp_expire_vcc; |
| 2010 | hlist_add_head(&entry->next, &priv->lec_no_forward); |
| 2011 | add_timer(&entry->timer); |
| 2012 | dump_arp_table(priv); |
| 2013 | goto out; |
| 2014 | } |
| 2015 | pr_debug("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", |
| 2016 | ioc_data->atm_addr[0], ioc_data->atm_addr[1], |
| 2017 | ioc_data->atm_addr[2], ioc_data->atm_addr[3], |
| 2018 | ioc_data->atm_addr[4], ioc_data->atm_addr[5], |
| 2019 | ioc_data->atm_addr[6], ioc_data->atm_addr[7], |
| 2020 | ioc_data->atm_addr[8], ioc_data->atm_addr[9], |
| 2021 | ioc_data->atm_addr[10], ioc_data->atm_addr[11], |
| 2022 | ioc_data->atm_addr[12], ioc_data->atm_addr[13], |
| 2023 | ioc_data->atm_addr[14], ioc_data->atm_addr[15], |
| 2024 | ioc_data->atm_addr[16], ioc_data->atm_addr[17], |
| 2025 | ioc_data->atm_addr[18], ioc_data->atm_addr[19]); |
| 2026 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2027 | hlist_for_each_entry(entry, |
| 2028 | &priv->lec_arp_tables[i], next) { |
| 2029 | if (memcmp |
| 2030 | (ioc_data->atm_addr, entry->atm_addr, |
| 2031 | ATM_ESA_LEN) == 0) { |
| 2032 | pr_debug("LEC_ARP: Attaching data direct\n"); |
| 2033 | pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", |
| 2034 | entry->vcc ? entry->vcc->vci : 0, |
| 2035 | entry->recv_vcc ? entry->recv_vcc-> |
| 2036 | vci : 0); |
| 2037 | found_entry = 1; |
| 2038 | del_timer(&entry->timer); |
| 2039 | entry->vcc = vcc; |
| 2040 | entry->old_push = old_push; |
| 2041 | if (entry->status == ESI_VC_PENDING) { |
| 2042 | if (priv->maximum_unknown_frame_count |
| 2043 | == 0) |
| 2044 | entry->status = |
| 2045 | ESI_FORWARD_DIRECT; |
| 2046 | else { |
| 2047 | entry->timestamp = jiffies; |
| 2048 | entry->status = |
| 2049 | ESI_FLUSH_PENDING; |
| 2050 | #if 0 |
| 2051 | send_to_lecd(priv, l_flush_xmt, |
| 2052 | NULL, |
| 2053 | entry->atm_addr, |
| 2054 | NULL); |
| 2055 | #endif |
| 2056 | } |
| 2057 | } else { |
| 2058 | /* |
| 2059 | * They were forming a connection |
| 2060 | * to us, and we to them. Our |
| 2061 | * ATM address is numerically lower |
| 2062 | * than theirs, so we make connection |
| 2063 | * we formed into default VCC (8.1.11). |
| 2064 | * Connection they made gets torn |
| 2065 | * down. This might confuse some |
| 2066 | * clients. Can be changed if |
| 2067 | * someone reports trouble... |
| 2068 | */ |
| 2069 | ; |
| 2070 | } |
| 2071 | } |
| 2072 | } |
| 2073 | } |
| 2074 | if (found_entry) { |
| 2075 | pr_debug("After vcc was added\n"); |
| 2076 | dump_arp_table(priv); |
| 2077 | goto out; |
| 2078 | } |
| 2079 | /* |
| 2080 | * Not found, snatch address from first data packet that arrives |
| 2081 | * from this vcc |
| 2082 | */ |
| 2083 | entry = make_entry(priv, bus_mac); |
| 2084 | if (!entry) |
| 2085 | goto out; |
| 2086 | entry->vcc = vcc; |
| 2087 | entry->old_push = old_push; |
| 2088 | memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); |
| 2089 | eth_zero_addr(entry->mac_addr); |
| 2090 | entry->status = ESI_UNKNOWN; |
| 2091 | hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); |
| 2092 | entry->timer.expires = jiffies + priv->vcc_timeout_period; |
| 2093 | entry->timer.function = lec_arp_expire_vcc; |
| 2094 | add_timer(&entry->timer); |
| 2095 | pr_debug("After vcc was added\n"); |
| 2096 | dump_arp_table(priv); |
| 2097 | out: |
| 2098 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2099 | } |
| 2100 | |
| 2101 | static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) |
| 2102 | { |
| 2103 | unsigned long flags; |
| 2104 | struct lec_arp_table *entry; |
| 2105 | int i; |
| 2106 | |
| 2107 | pr_debug("%lx\n", tran_id); |
| 2108 | restart: |
| 2109 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2110 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2111 | hlist_for_each_entry(entry, |
| 2112 | &priv->lec_arp_tables[i], next) { |
| 2113 | if (entry->flush_tran_id == tran_id && |
| 2114 | entry->status == ESI_FLUSH_PENDING) { |
| 2115 | struct sk_buff *skb; |
| 2116 | struct atm_vcc *vcc = entry->vcc; |
| 2117 | |
| 2118 | lec_arp_hold(entry); |
| 2119 | spin_unlock_irqrestore(&priv->lec_arp_lock, |
| 2120 | flags); |
| 2121 | while ((skb = skb_dequeue(&entry->tx_wait))) |
| 2122 | lec_send(vcc, skb); |
| 2123 | entry->last_used = jiffies; |
| 2124 | entry->status = ESI_FORWARD_DIRECT; |
| 2125 | lec_arp_put(entry); |
| 2126 | pr_debug("LEC_ARP: Flushed\n"); |
| 2127 | goto restart; |
| 2128 | } |
| 2129 | } |
| 2130 | } |
| 2131 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2132 | dump_arp_table(priv); |
| 2133 | } |
| 2134 | |
| 2135 | static void |
| 2136 | lec_set_flush_tran_id(struct lec_priv *priv, |
| 2137 | const unsigned char *atm_addr, unsigned long tran_id) |
| 2138 | { |
| 2139 | unsigned long flags; |
| 2140 | struct lec_arp_table *entry; |
| 2141 | int i; |
| 2142 | |
| 2143 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2144 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) |
| 2145 | hlist_for_each_entry(entry, |
| 2146 | &priv->lec_arp_tables[i], next) { |
| 2147 | if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { |
| 2148 | entry->flush_tran_id = tran_id; |
| 2149 | pr_debug("Set flush transaction id to %lx for %p\n", |
| 2150 | tran_id, entry); |
| 2151 | } |
| 2152 | } |
| 2153 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2154 | } |
| 2155 | |
| 2156 | static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) |
| 2157 | { |
| 2158 | unsigned long flags; |
| 2159 | unsigned char mac_addr[] = { |
| 2160 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
| 2161 | }; |
| 2162 | struct lec_arp_table *to_add; |
| 2163 | struct lec_vcc_priv *vpriv; |
| 2164 | int err = 0; |
| 2165 | |
| 2166 | vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL); |
| 2167 | if (!vpriv) |
| 2168 | return -ENOMEM; |
| 2169 | vpriv->xoff = 0; |
| 2170 | vpriv->old_pop = vcc->pop; |
| 2171 | vcc->user_back = vpriv; |
| 2172 | vcc->pop = lec_pop; |
| 2173 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2174 | to_add = make_entry(priv, mac_addr); |
| 2175 | if (!to_add) { |
| 2176 | vcc->pop = vpriv->old_pop; |
| 2177 | kfree(vpriv); |
| 2178 | err = -ENOMEM; |
| 2179 | goto out; |
| 2180 | } |
| 2181 | memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); |
| 2182 | to_add->status = ESI_FORWARD_DIRECT; |
| 2183 | to_add->flags |= LEC_PERMANENT_FLAG; |
| 2184 | to_add->vcc = vcc; |
| 2185 | to_add->old_push = vcc->push; |
| 2186 | vcc->push = lec_push; |
| 2187 | priv->mcast_vcc = vcc; |
| 2188 | lec_arp_add(priv, to_add); |
| 2189 | out: |
| 2190 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2191 | return err; |
| 2192 | } |
| 2193 | |
| 2194 | static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) |
| 2195 | { |
| 2196 | unsigned long flags; |
| 2197 | struct hlist_node *next; |
| 2198 | struct lec_arp_table *entry; |
| 2199 | int i; |
| 2200 | |
| 2201 | pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); |
| 2202 | dump_arp_table(priv); |
| 2203 | |
| 2204 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2205 | |
| 2206 | for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { |
| 2207 | hlist_for_each_entry_safe(entry, next, |
| 2208 | &priv->lec_arp_tables[i], next) { |
| 2209 | if (vcc == entry->vcc) { |
| 2210 | lec_arp_remove(priv, entry); |
| 2211 | lec_arp_put(entry); |
| 2212 | if (priv->mcast_vcc == vcc) |
| 2213 | priv->mcast_vcc = NULL; |
| 2214 | } |
| 2215 | } |
| 2216 | } |
| 2217 | |
| 2218 | hlist_for_each_entry_safe(entry, next, |
| 2219 | &priv->lec_arp_empty_ones, next) { |
| 2220 | if (entry->vcc == vcc) { |
| 2221 | lec_arp_clear_vccs(entry); |
| 2222 | del_timer(&entry->timer); |
| 2223 | hlist_del(&entry->next); |
| 2224 | lec_arp_put(entry); |
| 2225 | } |
| 2226 | } |
| 2227 | |
| 2228 | hlist_for_each_entry_safe(entry, next, |
| 2229 | &priv->lec_no_forward, next) { |
| 2230 | if (entry->recv_vcc == vcc) { |
| 2231 | lec_arp_clear_vccs(entry); |
| 2232 | del_timer(&entry->timer); |
| 2233 | hlist_del(&entry->next); |
| 2234 | lec_arp_put(entry); |
| 2235 | } |
| 2236 | } |
| 2237 | |
| 2238 | hlist_for_each_entry_safe(entry, next, &priv->mcast_fwds, next) { |
| 2239 | if (entry->recv_vcc == vcc) { |
| 2240 | lec_arp_clear_vccs(entry); |
| 2241 | /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ |
| 2242 | hlist_del(&entry->next); |
| 2243 | lec_arp_put(entry); |
| 2244 | } |
| 2245 | } |
| 2246 | |
| 2247 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2248 | dump_arp_table(priv); |
| 2249 | } |
| 2250 | |
| 2251 | static void |
| 2252 | lec_arp_check_empties(struct lec_priv *priv, |
| 2253 | struct atm_vcc *vcc, struct sk_buff *skb) |
| 2254 | { |
| 2255 | unsigned long flags; |
| 2256 | struct hlist_node *next; |
| 2257 | struct lec_arp_table *entry, *tmp; |
| 2258 | struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; |
| 2259 | unsigned char *src = hdr->h_source; |
| 2260 | |
| 2261 | spin_lock_irqsave(&priv->lec_arp_lock, flags); |
| 2262 | hlist_for_each_entry_safe(entry, next, |
| 2263 | &priv->lec_arp_empty_ones, next) { |
| 2264 | if (vcc == entry->vcc) { |
| 2265 | del_timer(&entry->timer); |
| 2266 | ether_addr_copy(entry->mac_addr, src); |
| 2267 | entry->status = ESI_FORWARD_DIRECT; |
| 2268 | entry->last_used = jiffies; |
| 2269 | /* We might have got an entry */ |
| 2270 | tmp = lec_arp_find(priv, src); |
| 2271 | if (tmp) { |
| 2272 | lec_arp_remove(priv, tmp); |
| 2273 | lec_arp_put(tmp); |
| 2274 | } |
| 2275 | hlist_del(&entry->next); |
| 2276 | lec_arp_add(priv, entry); |
| 2277 | goto out; |
| 2278 | } |
| 2279 | } |
| 2280 | pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); |
| 2281 | out: |
| 2282 | spin_unlock_irqrestore(&priv->lec_arp_lock, flags); |
| 2283 | } |
| 2284 | |
| 2285 | MODULE_LICENSE("GPL"); |