1 /* 2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 * $Id: ipoib_multicast.c 1362 2004-12-18 15:56:29Z roland $ 35 */ 36 37 #include <linux/skbuff.h> 38 #include <linux/rtnetlink.h> 39 #include <linux/ip.h> 40 #include <linux/in.h> 41 #include <linux/igmp.h> 42 #include <linux/inetdevice.h> 43 #include <linux/delay.h> 44 #include <linux/completion.h> 45 46 #include "ipoib.h" 47 48 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 49 static int mcast_debug_level; 50 51 module_param(mcast_debug_level, int, 0644); 52 MODULE_PARM_DESC(mcast_debug_level, 53 "Enable multicast debug tracing if > 0"); 54 #endif 55 56 static DECLARE_MUTEX(mcast_mutex); 57 58 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */ 59 struct ipoib_mcast { 60 struct ib_sa_mcmember_rec mcmember; 61 struct ipoib_ah *ah; 62 63 struct rb_node rb_node; 64 struct list_head list; 65 struct completion done; 66 67 int query_id; 68 struct ib_sa_query *query; 69 70 unsigned long created; 71 unsigned long backoff; 72 73 unsigned long flags; 74 unsigned char logcount; 75 76 struct list_head neigh_list; 77 78 struct sk_buff_head pkt_queue; 79 80 struct net_device *dev; 81 }; 82 83 struct ipoib_mcast_iter { 84 struct net_device *dev; 85 union ib_gid mgid; 86 unsigned long created; 87 unsigned int queuelen; 88 unsigned int complete; 89 unsigned int send_only; 90 }; 91 92 static void ipoib_mcast_free(struct ipoib_mcast *mcast) 93 { 94 struct net_device *dev = mcast->dev; 95 struct ipoib_dev_priv *priv = netdev_priv(dev); 96 struct ipoib_neigh *neigh, *tmp; 97 unsigned long flags; 98 LIST_HEAD(ah_list); 99 struct ipoib_ah *ah, *tah; 100 101 ipoib_dbg_mcast(netdev_priv(dev), 102 "deleting multicast group " IPOIB_GID_FMT "\n", 103 IPOIB_GID_ARG(mcast->mcmember.mgid)); 104 105 spin_lock_irqsave(&priv->lock, flags); 106 107 list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { 108 if (neigh->ah) 109 list_add_tail(&neigh->ah->list, &ah_list); 110 *to_ipoib_neigh(neigh->neighbour) = NULL; 111 neigh->neighbour->ops->destructor = NULL; 112 kfree(neigh); 113 } 114 115 spin_unlock_irqrestore(&priv->lock, flags); 116 117 list_for_each_entry_safe(ah, tah, &ah_list, list) 118 ipoib_put_ah(ah); 119 120 if (mcast->ah) 121 ipoib_put_ah(mcast->ah); 122 123 while (!skb_queue_empty(&mcast->pkt_queue)) { 124 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); 125 126 skb->dev = dev; 127 dev_kfree_skb_any(skb); 128 } 129 130 kfree(mcast); 131 } 132 133 static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, 134 int can_sleep) 135 { 136 struct ipoib_mcast *mcast; 137 138 mcast = kmalloc(sizeof (*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC); 139 if (!mcast) 140 return NULL; 141 142 memset(mcast, 0, sizeof (*mcast)); 143 144 init_completion(&mcast->done); 145 146 mcast->dev = dev; 147 mcast->created = jiffies; 148 mcast->backoff = 1; 149 mcast->logcount = 0; 150 151 INIT_LIST_HEAD(&mcast->list); 152 INIT_LIST_HEAD(&mcast->neigh_list); 153 skb_queue_head_init(&mcast->pkt_queue); 154 155 mcast->ah = NULL; 156 mcast->query = NULL; 157 158 return mcast; 159 } 160 161 static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid) 162 { 163 struct ipoib_dev_priv *priv = netdev_priv(dev); 164 struct rb_node *n = priv->multicast_tree.rb_node; 165 166 while (n) { 167 struct ipoib_mcast *mcast; 168 int ret; 169 170 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 171 172 ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw, 173 sizeof (union ib_gid)); 174 if (ret < 0) 175 n = n->rb_left; 176 else if (ret > 0) 177 n = n->rb_right; 178 else 179 return mcast; 180 } 181 182 return NULL; 183 } 184 185 static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) 186 { 187 struct ipoib_dev_priv *priv = netdev_priv(dev); 188 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; 189 190 while (*n) { 191 struct ipoib_mcast *tmcast; 192 int ret; 193 194 pn = *n; 195 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); 196 197 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, 198 sizeof (union ib_gid)); 199 if (ret < 0) 200 n = &pn->rb_left; 201 else if (ret > 0) 202 n = &pn->rb_right; 203 else 204 return -EEXIST; 205 } 206 207 rb_link_node(&mcast->rb_node, pn, n); 208 rb_insert_color(&mcast->rb_node, &priv->multicast_tree); 209 210 return 0; 211 } 212 213 static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, 214 struct ib_sa_mcmember_rec *mcmember) 215 { 216 struct net_device *dev = mcast->dev; 217 struct ipoib_dev_priv *priv = netdev_priv(dev); 218 int ret; 219 220 mcast->mcmember = *mcmember; 221 222 /* Set the cached Q_Key before we attach if it's the broadcast group */ 223 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 224 sizeof (union ib_gid))) { 225 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); 226 priv->tx_wr.wr.ud.remote_qkey = priv->qkey; 227 } 228 229 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 230 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 231 ipoib_warn(priv, "multicast group " IPOIB_GID_FMT 232 " already attached\n", 233 IPOIB_GID_ARG(mcast->mcmember.mgid)); 234 235 return 0; 236 } 237 238 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), 239 &mcast->mcmember.mgid); 240 if (ret < 0) { 241 ipoib_warn(priv, "couldn't attach QP to multicast group " 242 IPOIB_GID_FMT "\n", 243 IPOIB_GID_ARG(mcast->mcmember.mgid)); 244 245 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); 246 return ret; 247 } 248 } 249 250 { 251 struct ib_ah_attr av = { 252 .dlid = be16_to_cpu(mcast->mcmember.mlid), 253 .port_num = priv->port, 254 .sl = mcast->mcmember.sl, 255 .ah_flags = IB_AH_GRH, 256 .grh = { 257 .flow_label = be32_to_cpu(mcast->mcmember.flow_label), 258 .hop_limit = mcast->mcmember.hop_limit, 259 .sgid_index = 0, 260 .traffic_class = mcast->mcmember.traffic_class 261 } 262 }; 263 int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate); 264 265 av.grh.dgid = mcast->mcmember.mgid; 266 267 if (path_rate > 0 && priv->local_rate > path_rate) 268 av.static_rate = (priv->local_rate - 1) / path_rate; 269 270 ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n", 271 av.static_rate, priv->local_rate, 272 ib_sa_rate_enum_to_int(mcast->mcmember.rate)); 273 274 mcast->ah = ipoib_create_ah(dev, priv->pd, &av); 275 if (!mcast->ah) { 276 ipoib_warn(priv, "ib_address_create failed\n"); 277 } else { 278 ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT 279 " AV %p, LID 0x%04x, SL %d\n", 280 IPOIB_GID_ARG(mcast->mcmember.mgid), 281 mcast->ah->ah, 282 be16_to_cpu(mcast->mcmember.mlid), 283 mcast->mcmember.sl); 284 } 285 } 286 287 /* actually send any queued packets */ 288 while (!skb_queue_empty(&mcast->pkt_queue)) { 289 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); 290 291 skb->dev = dev; 292 293 if (!skb->dst || !skb->dst->neighbour) { 294 /* put pseudoheader back on for next time */ 295 skb_push(skb, sizeof (struct ipoib_pseudoheader)); 296 } 297 298 if (dev_queue_xmit(skb)) 299 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); 300 } 301 302 return 0; 303 } 304 305 static void 306 ipoib_mcast_sendonly_join_complete(int status, 307 struct ib_sa_mcmember_rec *mcmember, 308 void *mcast_ptr) 309 { 310 struct ipoib_mcast *mcast = mcast_ptr; 311 struct net_device *dev = mcast->dev; 312 313 if (!status) 314 ipoib_mcast_join_finish(mcast, mcmember); 315 else { 316 if (mcast->logcount++ < 20) 317 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for " 318 IPOIB_GID_FMT ", status %d\n", 319 IPOIB_GID_ARG(mcast->mcmember.mgid), status); 320 321 /* Flush out any queued packets */ 322 while (!skb_queue_empty(&mcast->pkt_queue)) { 323 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); 324 325 skb->dev = dev; 326 327 dev_kfree_skb_any(skb); 328 } 329 330 /* Clear the busy flag so we try again */ 331 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 332 } 333 334 complete(&mcast->done); 335 } 336 337 static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) 338 { 339 struct net_device *dev = mcast->dev; 340 struct ipoib_dev_priv *priv = netdev_priv(dev); 341 struct ib_sa_mcmember_rec rec = { 342 #if 0 /* Some SMs don't support send-only yet */ 343 .join_state = 4 344 #else 345 .join_state = 1 346 #endif 347 }; 348 int ret = 0; 349 350 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { 351 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); 352 return -ENODEV; 353 } 354 355 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { 356 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); 357 return -EBUSY; 358 } 359 360 rec.mgid = mcast->mcmember.mgid; 361 rec.port_gid = priv->local_gid; 362 rec.pkey = cpu_to_be16(priv->pkey); 363 364 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, 365 IB_SA_MCMEMBER_REC_MGID | 366 IB_SA_MCMEMBER_REC_PORT_GID | 367 IB_SA_MCMEMBER_REC_PKEY | 368 IB_SA_MCMEMBER_REC_JOIN_STATE, 369 1000, GFP_ATOMIC, 370 ipoib_mcast_sendonly_join_complete, 371 mcast, &mcast->query); 372 if (ret < 0) { 373 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed (ret = %d)\n", 374 ret); 375 } else { 376 ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT 377 ", starting join\n", 378 IPOIB_GID_ARG(mcast->mcmember.mgid)); 379 380 mcast->query_id = ret; 381 } 382 383 return ret; 384 } 385 386 static void ipoib_mcast_join_complete(int status, 387 struct ib_sa_mcmember_rec *mcmember, 388 void *mcast_ptr) 389 { 390 struct ipoib_mcast *mcast = mcast_ptr; 391 struct net_device *dev = mcast->dev; 392 struct ipoib_dev_priv *priv = netdev_priv(dev); 393 394 ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT 395 " (status %d)\n", 396 IPOIB_GID_ARG(mcast->mcmember.mgid), status); 397 398 if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) { 399 mcast->backoff = 1; 400 down(&mcast_mutex); 401 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 402 queue_work(ipoib_workqueue, &priv->mcast_task); 403 up(&mcast_mutex); 404 complete(&mcast->done); 405 return; 406 } 407 408 if (status == -EINTR) { 409 complete(&mcast->done); 410 return; 411 } 412 413 if (status && mcast->logcount++ < 20) { 414 if (status == -ETIMEDOUT || status == -EINTR) { 415 ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT 416 ", status %d\n", 417 IPOIB_GID_ARG(mcast->mcmember.mgid), 418 status); 419 } else { 420 ipoib_warn(priv, "multicast join failed for " 421 IPOIB_GID_FMT ", status %d\n", 422 IPOIB_GID_ARG(mcast->mcmember.mgid), 423 status); 424 } 425 } 426 427 mcast->backoff *= 2; 428 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 429 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 430 431 mcast->query = NULL; 432 433 down(&mcast_mutex); 434 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) { 435 if (status == -ETIMEDOUT) 436 queue_work(ipoib_workqueue, &priv->mcast_task); 437 else 438 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 439 mcast->backoff * HZ); 440 } else 441 complete(&mcast->done); 442 up(&mcast_mutex); 443 444 return; 445 } 446 447 static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, 448 int create) 449 { 450 struct ipoib_dev_priv *priv = netdev_priv(dev); 451 struct ib_sa_mcmember_rec rec = { 452 .join_state = 1 453 }; 454 ib_sa_comp_mask comp_mask; 455 int ret = 0; 456 457 ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n", 458 IPOIB_GID_ARG(mcast->mcmember.mgid)); 459 460 rec.mgid = mcast->mcmember.mgid; 461 rec.port_gid = priv->local_gid; 462 rec.pkey = cpu_to_be16(priv->pkey); 463 464 comp_mask = 465 IB_SA_MCMEMBER_REC_MGID | 466 IB_SA_MCMEMBER_REC_PORT_GID | 467 IB_SA_MCMEMBER_REC_PKEY | 468 IB_SA_MCMEMBER_REC_JOIN_STATE; 469 470 if (create) { 471 comp_mask |= 472 IB_SA_MCMEMBER_REC_QKEY | 473 IB_SA_MCMEMBER_REC_SL | 474 IB_SA_MCMEMBER_REC_FLOW_LABEL | 475 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS; 476 477 rec.qkey = priv->broadcast->mcmember.qkey; 478 rec.sl = priv->broadcast->mcmember.sl; 479 rec.flow_label = priv->broadcast->mcmember.flow_label; 480 rec.traffic_class = priv->broadcast->mcmember.traffic_class; 481 } 482 483 ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask, 484 mcast->backoff * 1000, GFP_ATOMIC, 485 ipoib_mcast_join_complete, 486 mcast, &mcast->query); 487 488 if (ret < 0) { 489 ipoib_warn(priv, "ib_sa_mcmember_rec_set failed, status %d\n", ret); 490 491 mcast->backoff *= 2; 492 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 493 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 494 495 down(&mcast_mutex); 496 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 497 queue_delayed_work(ipoib_workqueue, 498 &priv->mcast_task, 499 mcast->backoff * HZ); 500 up(&mcast_mutex); 501 } else 502 mcast->query_id = ret; 503 } 504 505 void ipoib_mcast_join_task(void *dev_ptr) 506 { 507 struct net_device *dev = dev_ptr; 508 struct ipoib_dev_priv *priv = netdev_priv(dev); 509 510 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) 511 return; 512 513 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) 514 ipoib_warn(priv, "ib_gid_entry_get() failed\n"); 515 else 516 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); 517 518 { 519 struct ib_port_attr attr; 520 521 if (!ib_query_port(priv->ca, priv->port, &attr)) { 522 priv->local_lid = attr.lid; 523 priv->local_rate = attr.active_speed * 524 ib_width_enum_to_int(attr.active_width); 525 } else 526 ipoib_warn(priv, "ib_query_port failed\n"); 527 } 528 529 if (!priv->broadcast) { 530 priv->broadcast = ipoib_mcast_alloc(dev, 1); 531 if (!priv->broadcast) { 532 ipoib_warn(priv, "failed to allocate broadcast group\n"); 533 down(&mcast_mutex); 534 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 535 queue_delayed_work(ipoib_workqueue, 536 &priv->mcast_task, HZ); 537 up(&mcast_mutex); 538 return; 539 } 540 541 memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 542 sizeof (union ib_gid)); 543 544 spin_lock_irq(&priv->lock); 545 __ipoib_mcast_add(dev, priv->broadcast); 546 spin_unlock_irq(&priv->lock); 547 } 548 549 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 550 ipoib_mcast_join(dev, priv->broadcast, 0); 551 return; 552 } 553 554 while (1) { 555 struct ipoib_mcast *mcast = NULL; 556 557 spin_lock_irq(&priv->lock); 558 list_for_each_entry(mcast, &priv->multicast_list, list) { 559 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) 560 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) 561 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 562 /* Found the next unjoined group */ 563 break; 564 } 565 } 566 spin_unlock_irq(&priv->lock); 567 568 if (&mcast->list == &priv->multicast_list) { 569 /* All done */ 570 break; 571 } 572 573 ipoib_mcast_join(dev, mcast, 1); 574 return; 575 } 576 577 priv->mcast_mtu = ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu) - 578 IPOIB_ENCAP_LEN; 579 dev->mtu = min(priv->mcast_mtu, priv->admin_mtu); 580 581 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); 582 583 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 584 netif_carrier_on(dev); 585 } 586 587 int ipoib_mcast_start_thread(struct net_device *dev) 588 { 589 struct ipoib_dev_priv *priv = netdev_priv(dev); 590 591 ipoib_dbg_mcast(priv, "starting multicast thread\n"); 592 593 down(&mcast_mutex); 594 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) 595 queue_work(ipoib_workqueue, &priv->mcast_task); 596 up(&mcast_mutex); 597 598 return 0; 599 } 600 601 int ipoib_mcast_stop_thread(struct net_device *dev, int flush) 602 { 603 struct ipoib_dev_priv *priv = netdev_priv(dev); 604 struct ipoib_mcast *mcast; 605 606 ipoib_dbg_mcast(priv, "stopping multicast thread\n"); 607 608 down(&mcast_mutex); 609 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 610 cancel_delayed_work(&priv->mcast_task); 611 up(&mcast_mutex); 612 613 if (flush) 614 flush_workqueue(ipoib_workqueue); 615 616 if (priv->broadcast && priv->broadcast->query) { 617 ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query); 618 priv->broadcast->query = NULL; 619 ipoib_dbg_mcast(priv, "waiting for bcast\n"); 620 wait_for_completion(&priv->broadcast->done); 621 } 622 623 list_for_each_entry(mcast, &priv->multicast_list, list) { 624 if (mcast->query) { 625 ib_sa_cancel_query(mcast->query_id, mcast->query); 626 mcast->query = NULL; 627 ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n", 628 IPOIB_GID_ARG(mcast->mcmember.mgid)); 629 wait_for_completion(&mcast->done); 630 } 631 } 632 633 return 0; 634 } 635 636 static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) 637 { 638 struct ipoib_dev_priv *priv = netdev_priv(dev); 639 struct ib_sa_mcmember_rec rec = { 640 .join_state = 1 641 }; 642 int ret = 0; 643 644 if (!test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) 645 return 0; 646 647 ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n", 648 IPOIB_GID_ARG(mcast->mcmember.mgid)); 649 650 rec.mgid = mcast->mcmember.mgid; 651 rec.port_gid = priv->local_gid; 652 rec.pkey = cpu_to_be16(priv->pkey); 653 654 /* Remove ourselves from the multicast group */ 655 ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid), 656 &mcast->mcmember.mgid); 657 if (ret) 658 ipoib_warn(priv, "ipoib_mcast_detach failed (result = %d)\n", ret); 659 660 /* 661 * Just make one shot at leaving and don't wait for a reply; 662 * if we fail, too bad. 663 */ 664 ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec, 665 IB_SA_MCMEMBER_REC_MGID | 666 IB_SA_MCMEMBER_REC_PORT_GID | 667 IB_SA_MCMEMBER_REC_PKEY | 668 IB_SA_MCMEMBER_REC_JOIN_STATE, 669 0, GFP_ATOMIC, NULL, 670 mcast, &mcast->query); 671 if (ret < 0) 672 ipoib_warn(priv, "ib_sa_mcmember_rec_delete failed " 673 "for leave (result = %d)\n", ret); 674 675 return 0; 676 } 677 678 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid, 679 struct sk_buff *skb) 680 { 681 struct ipoib_dev_priv *priv = netdev_priv(dev); 682 struct ipoib_mcast *mcast; 683 684 /* 685 * We can only be called from ipoib_start_xmit, so we're 686 * inside tx_lock -- no need to save/restore flags. 687 */ 688 spin_lock(&priv->lock); 689 690 mcast = __ipoib_mcast_find(dev, mgid); 691 if (!mcast) { 692 /* Let's create a new send only group now */ 693 ipoib_dbg_mcast(priv, "setting up send only multicast group for " 694 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid)); 695 696 mcast = ipoib_mcast_alloc(dev, 0); 697 if (!mcast) { 698 ipoib_warn(priv, "unable to allocate memory for " 699 "multicast structure\n"); 700 dev_kfree_skb_any(skb); 701 goto out; 702 } 703 704 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); 705 mcast->mcmember.mgid = *mgid; 706 __ipoib_mcast_add(dev, mcast); 707 list_add_tail(&mcast->list, &priv->multicast_list); 708 } 709 710 if (!mcast->ah) { 711 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) 712 skb_queue_tail(&mcast->pkt_queue, skb); 713 else 714 dev_kfree_skb_any(skb); 715 716 if (mcast->query) 717 ipoib_dbg_mcast(priv, "no address vector, " 718 "but multicast join already started\n"); 719 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) 720 ipoib_mcast_sendonly_join(mcast); 721 722 /* 723 * If lookup completes between here and out:, don't 724 * want to send packet twice. 725 */ 726 mcast = NULL; 727 } 728 729 out: 730 if (mcast && mcast->ah) { 731 if (skb->dst && 732 skb->dst->neighbour && 733 !*to_ipoib_neigh(skb->dst->neighbour)) { 734 struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC); 735 736 if (neigh) { 737 kref_get(&mcast->ah->ref); 738 neigh->ah = mcast->ah; 739 neigh->neighbour = skb->dst->neighbour; 740 *to_ipoib_neigh(skb->dst->neighbour) = neigh; 741 list_add_tail(&neigh->list, &mcast->neigh_list); 742 } 743 } 744 745 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); 746 } 747 748 spin_unlock(&priv->lock); 749 } 750 751 void ipoib_mcast_dev_flush(struct net_device *dev) 752 { 753 struct ipoib_dev_priv *priv = netdev_priv(dev); 754 LIST_HEAD(remove_list); 755 struct ipoib_mcast *mcast, *tmcast, *nmcast; 756 unsigned long flags; 757 758 ipoib_dbg_mcast(priv, "flushing multicast list\n"); 759 760 spin_lock_irqsave(&priv->lock, flags); 761 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 762 nmcast = ipoib_mcast_alloc(dev, 0); 763 if (nmcast) { 764 nmcast->flags = 765 mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY); 766 767 nmcast->mcmember.mgid = mcast->mcmember.mgid; 768 769 /* Add the new group in before the to-be-destroyed group */ 770 list_add_tail(&nmcast->list, &mcast->list); 771 list_del_init(&mcast->list); 772 773 rb_replace_node(&mcast->rb_node, &nmcast->rb_node, 774 &priv->multicast_tree); 775 776 list_add_tail(&mcast->list, &remove_list); 777 } else { 778 ipoib_warn(priv, "could not reallocate multicast group " 779 IPOIB_GID_FMT "\n", 780 IPOIB_GID_ARG(mcast->mcmember.mgid)); 781 } 782 } 783 784 if (priv->broadcast) { 785 nmcast = ipoib_mcast_alloc(dev, 0); 786 if (nmcast) { 787 nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid; 788 789 rb_replace_node(&priv->broadcast->rb_node, 790 &nmcast->rb_node, 791 &priv->multicast_tree); 792 793 list_add_tail(&priv->broadcast->list, &remove_list); 794 } 795 796 priv->broadcast = nmcast; 797 } 798 799 spin_unlock_irqrestore(&priv->lock, flags); 800 801 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 802 ipoib_mcast_leave(dev, mcast); 803 ipoib_mcast_free(mcast); 804 } 805 } 806 807 void ipoib_mcast_dev_down(struct net_device *dev) 808 { 809 struct ipoib_dev_priv *priv = netdev_priv(dev); 810 unsigned long flags; 811 812 /* Delete broadcast since it will be recreated */ 813 if (priv->broadcast) { 814 ipoib_dbg_mcast(priv, "deleting broadcast group\n"); 815 816 spin_lock_irqsave(&priv->lock, flags); 817 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); 818 spin_unlock_irqrestore(&priv->lock, flags); 819 ipoib_mcast_leave(dev, priv->broadcast); 820 ipoib_mcast_free(priv->broadcast); 821 priv->broadcast = NULL; 822 } 823 } 824 825 void ipoib_mcast_restart_task(void *dev_ptr) 826 { 827 struct net_device *dev = dev_ptr; 828 struct ipoib_dev_priv *priv = netdev_priv(dev); 829 struct dev_mc_list *mclist; 830 struct ipoib_mcast *mcast, *tmcast; 831 LIST_HEAD(remove_list); 832 unsigned long flags; 833 834 ipoib_dbg_mcast(priv, "restarting multicast task\n"); 835 836 ipoib_mcast_stop_thread(dev, 0); 837 838 spin_lock_irqsave(&priv->lock, flags); 839 840 /* 841 * Unfortunately, the networking core only gives us a list of all of 842 * the multicast hardware addresses. We need to figure out which ones 843 * are new and which ones have been removed 844 */ 845 846 /* Clear out the found flag */ 847 list_for_each_entry(mcast, &priv->multicast_list, list) 848 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 849 850 /* Mark all of the entries that are found or don't exist */ 851 for (mclist = dev->mc_list; mclist; mclist = mclist->next) { 852 union ib_gid mgid; 853 854 memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); 855 856 /* Add in the P_Key */ 857 mgid.raw[4] = (priv->pkey >> 8) & 0xff; 858 mgid.raw[5] = priv->pkey & 0xff; 859 860 mcast = __ipoib_mcast_find(dev, &mgid); 861 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 862 struct ipoib_mcast *nmcast; 863 864 /* Not found or send-only group, let's add a new entry */ 865 ipoib_dbg_mcast(priv, "adding multicast entry for mgid " 866 IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); 867 868 nmcast = ipoib_mcast_alloc(dev, 0); 869 if (!nmcast) { 870 ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); 871 continue; 872 } 873 874 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); 875 876 nmcast->mcmember.mgid = mgid; 877 878 if (mcast) { 879 /* Destroy the send only entry */ 880 list_del(&mcast->list); 881 list_add_tail(&mcast->list, &remove_list); 882 883 rb_replace_node(&mcast->rb_node, 884 &nmcast->rb_node, 885 &priv->multicast_tree); 886 } else 887 __ipoib_mcast_add(dev, nmcast); 888 889 list_add_tail(&nmcast->list, &priv->multicast_list); 890 } 891 892 if (mcast) 893 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 894 } 895 896 /* Remove all of the entries don't exist anymore */ 897 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 898 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && 899 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 900 ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n", 901 IPOIB_GID_ARG(mcast->mcmember.mgid)); 902 903 rb_erase(&mcast->rb_node, &priv->multicast_tree); 904 905 /* Move to the remove list */ 906 list_del(&mcast->list); 907 list_add_tail(&mcast->list, &remove_list); 908 } 909 } 910 spin_unlock_irqrestore(&priv->lock, flags); 911 912 /* We have to cancel outside of the spinlock */ 913 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 914 ipoib_mcast_leave(mcast->dev, mcast); 915 ipoib_mcast_free(mcast); 916 } 917 918 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 919 ipoib_mcast_start_thread(dev); 920 } 921 922 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) 923 { 924 struct ipoib_mcast_iter *iter; 925 926 iter = kmalloc(sizeof *iter, GFP_KERNEL); 927 if (!iter) 928 return NULL; 929 930 iter->dev = dev; 931 memset(iter->mgid.raw, 0, sizeof iter->mgid); 932 933 if (ipoib_mcast_iter_next(iter)) { 934 ipoib_mcast_iter_free(iter); 935 return NULL; 936 } 937 938 return iter; 939 } 940 941 void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter) 942 { 943 kfree(iter); 944 } 945 946 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) 947 { 948 struct ipoib_dev_priv *priv = netdev_priv(iter->dev); 949 struct rb_node *n; 950 struct ipoib_mcast *mcast; 951 int ret = 1; 952 953 spin_lock_irq(&priv->lock); 954 955 n = rb_first(&priv->multicast_tree); 956 957 while (n) { 958 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 959 960 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, 961 sizeof (union ib_gid)) < 0) { 962 iter->mgid = mcast->mcmember.mgid; 963 iter->created = mcast->created; 964 iter->queuelen = skb_queue_len(&mcast->pkt_queue); 965 iter->complete = !!mcast->ah; 966 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); 967 968 ret = 0; 969 970 break; 971 } 972 973 n = rb_next(n); 974 } 975 976 spin_unlock_irq(&priv->lock); 977 978 return ret; 979 } 980 981 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, 982 union ib_gid *mgid, 983 unsigned long *created, 984 unsigned int *queuelen, 985 unsigned int *complete, 986 unsigned int *send_only) 987 { 988 *mgid = iter->mgid; 989 *created = iter->created; 990 *queuelen = iter->queuelen; 991 *complete = iter->complete; 992 *send_only = iter->send_only; 993 } 994