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 35#include <linux/skbuff.h> 36#include <linux/rtnetlink.h> 37#include <linux/moduleparam.h> 38#include <linux/ip.h> 39#include <linux/in.h> 40#include <linux/igmp.h> 41#include <linux/inetdevice.h> 42#include <linux/delay.h> 43#include <linux/completion.h> 44#include <linux/slab.h> 45 46#include <net/dst.h> 47 48#include "ipoib.h" 49 50#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 51static int mcast_debug_level; 52 53module_param(mcast_debug_level, int, 0644); 54MODULE_PARM_DESC(mcast_debug_level, 55 "Enable multicast debug tracing if > 0"); 56#endif 57 58static DEFINE_MUTEX(mcast_mutex); 59 60struct ipoib_mcast_iter { 61 struct net_device *dev; 62 union ib_gid mgid; 63 unsigned long created; 64 unsigned int queuelen; 65 unsigned int complete; 66 unsigned int send_only; 67}; 68 69static void ipoib_mcast_free(struct ipoib_mcast *mcast) 70{ 71 struct net_device *dev = mcast->dev; 72 int tx_dropped = 0; 73 74 ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n", 75 mcast->mcmember.mgid.raw); 76 77 /* remove all neigh connected to this mcast */ 78 ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw); 79 80 if (mcast->ah) 81 ipoib_put_ah(mcast->ah); 82 83 while (!skb_queue_empty(&mcast->pkt_queue)) { 84 ++tx_dropped; 85 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); 86 } 87 88 netif_tx_lock_bh(dev); 89 dev->stats.tx_dropped += tx_dropped; 90 netif_tx_unlock_bh(dev); 91 92 kfree(mcast); 93} 94 95static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, 96 int can_sleep) 97{ 98 struct ipoib_mcast *mcast; 99 100 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); 101 if (!mcast) 102 return NULL; 103 104 mcast->dev = dev; 105 mcast->created = jiffies; 106 mcast->backoff = 1; 107 108 INIT_LIST_HEAD(&mcast->list); 109 INIT_LIST_HEAD(&mcast->neigh_list); 110 skb_queue_head_init(&mcast->pkt_queue); 111 112 return mcast; 113} 114 115static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) 116{ 117 struct ipoib_dev_priv *priv = netdev_priv(dev); 118 struct rb_node *n = priv->multicast_tree.rb_node; 119 120 while (n) { 121 struct ipoib_mcast *mcast; 122 int ret; 123 124 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 125 126 ret = memcmp(mgid, mcast->mcmember.mgid.raw, 127 sizeof (union ib_gid)); 128 if (ret < 0) 129 n = n->rb_left; 130 else if (ret > 0) 131 n = n->rb_right; 132 else 133 return mcast; 134 } 135 136 return NULL; 137} 138 139static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) 140{ 141 struct ipoib_dev_priv *priv = netdev_priv(dev); 142 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; 143 144 while (*n) { 145 struct ipoib_mcast *tmcast; 146 int ret; 147 148 pn = *n; 149 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); 150 151 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, 152 sizeof (union ib_gid)); 153 if (ret < 0) 154 n = &pn->rb_left; 155 else if (ret > 0) 156 n = &pn->rb_right; 157 else 158 return -EEXIST; 159 } 160 161 rb_link_node(&mcast->rb_node, pn, n); 162 rb_insert_color(&mcast->rb_node, &priv->multicast_tree); 163 164 return 0; 165} 166 167static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, 168 struct ib_sa_mcmember_rec *mcmember) 169{ 170 struct net_device *dev = mcast->dev; 171 struct ipoib_dev_priv *priv = netdev_priv(dev); 172 struct ipoib_ah *ah; 173 int ret; 174 int set_qkey = 0; 175 176 mcast->mcmember = *mcmember; 177 178 /* Set the multicast MTU and cached Q_Key before we attach if it's 179 * the broadcast group. 180 */ 181 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 182 sizeof (union ib_gid))) { 183 spin_lock_irq(&priv->lock); 184 if (!priv->broadcast) { 185 spin_unlock_irq(&priv->lock); 186 return -EAGAIN; 187 } 188 priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); 189 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); 190 spin_unlock_irq(&priv->lock); 191 priv->tx_wr.wr.ud.remote_qkey = priv->qkey; 192 set_qkey = 1; 193 194 if (!ipoib_cm_admin_enabled(dev)) { 195 rtnl_lock(); 196 dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu)); 197 rtnl_unlock(); 198 } 199 } 200 201 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 202 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 203 ipoib_warn(priv, "multicast group %pI6 already attached\n", 204 mcast->mcmember.mgid.raw); 205 206 return 0; 207 } 208 209 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), 210 &mcast->mcmember.mgid, set_qkey); 211 if (ret < 0) { 212 ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n", 213 mcast->mcmember.mgid.raw); 214 215 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); 216 return ret; 217 } 218 } 219 220 { 221 struct ib_ah_attr av = { 222 .dlid = be16_to_cpu(mcast->mcmember.mlid), 223 .port_num = priv->port, 224 .sl = mcast->mcmember.sl, 225 .ah_flags = IB_AH_GRH, 226 .static_rate = mcast->mcmember.rate, 227 .grh = { 228 .flow_label = be32_to_cpu(mcast->mcmember.flow_label), 229 .hop_limit = mcast->mcmember.hop_limit, 230 .sgid_index = 0, 231 .traffic_class = mcast->mcmember.traffic_class 232 } 233 }; 234 av.grh.dgid = mcast->mcmember.mgid; 235 236 ah = ipoib_create_ah(dev, priv->pd, &av); 237 if (IS_ERR(ah)) { 238 ipoib_warn(priv, "ib_address_create failed %ld\n", 239 -PTR_ERR(ah)); 240 /* use original error */ 241 return PTR_ERR(ah); 242 } else { 243 spin_lock_irq(&priv->lock); 244 mcast->ah = ah; 245 spin_unlock_irq(&priv->lock); 246 247 ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n", 248 mcast->mcmember.mgid.raw, 249 mcast->ah->ah, 250 be16_to_cpu(mcast->mcmember.mlid), 251 mcast->mcmember.sl); 252 } 253 } 254 255 /* actually send any queued packets */ 256 netif_tx_lock_bh(dev); 257 while (!skb_queue_empty(&mcast->pkt_queue)) { 258 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); 259 260 netif_tx_unlock_bh(dev); 261 262 skb->dev = dev; 263 if (dev_queue_xmit(skb)) 264 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); 265 266 netif_tx_lock_bh(dev); 267 } 268 netif_tx_unlock_bh(dev); 269 270 return 0; 271} 272 273static int 274ipoib_mcast_sendonly_join_complete(int status, 275 struct ib_sa_multicast *multicast) 276{ 277 struct ipoib_mcast *mcast = multicast->context; 278 struct net_device *dev = mcast->dev; 279 280 /* We trap for port events ourselves. */ 281 if (status == -ENETRESET) 282 return 0; 283 284 if (!status) 285 status = ipoib_mcast_join_finish(mcast, &multicast->rec); 286 287 if (status) { 288 if (mcast->logcount++ < 20) 289 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for %pI6, status %d\n", 290 mcast->mcmember.mgid.raw, status); 291 292 /* Flush out any queued packets */ 293 netif_tx_lock_bh(dev); 294 while (!skb_queue_empty(&mcast->pkt_queue)) { 295 ++dev->stats.tx_dropped; 296 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); 297 } 298 netif_tx_unlock_bh(dev); 299 300 /* Clear the busy flag so we try again */ 301 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, 302 &mcast->flags); 303 } 304 return status; 305} 306 307static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) 308{ 309 struct net_device *dev = mcast->dev; 310 struct ipoib_dev_priv *priv = netdev_priv(dev); 311 struct ib_sa_mcmember_rec rec = { 312#if 0 /* Some SMs don't support send-only yet */ 313 .join_state = 4 314#else 315 .join_state = 1 316#endif 317 }; 318 int ret = 0; 319 320 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { 321 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); 322 return -ENODEV; 323 } 324 325 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { 326 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); 327 return -EBUSY; 328 } 329 330 rec.mgid = mcast->mcmember.mgid; 331 rec.port_gid = priv->local_gid; 332 rec.pkey = cpu_to_be16(priv->pkey); 333 334 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, 335 priv->port, &rec, 336 IB_SA_MCMEMBER_REC_MGID | 337 IB_SA_MCMEMBER_REC_PORT_GID | 338 IB_SA_MCMEMBER_REC_PKEY | 339 IB_SA_MCMEMBER_REC_JOIN_STATE, 340 GFP_ATOMIC, 341 ipoib_mcast_sendonly_join_complete, 342 mcast); 343 if (IS_ERR(mcast->mc)) { 344 ret = PTR_ERR(mcast->mc); 345 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 346 ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n", 347 ret); 348 } else { 349 ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting join\n", 350 mcast->mcmember.mgid.raw); 351 } 352 353 return ret; 354} 355 356void ipoib_mcast_carrier_on_task(struct work_struct *work) 357{ 358 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, 359 carrier_on_task); 360 struct ib_port_attr attr; 361 362 /* 363 * Take rtnl_lock to avoid racing with ipoib_stop() and 364 * turning the carrier back on while a device is being 365 * removed. 366 */ 367 if (ib_query_port(priv->ca, priv->port, &attr) || 368 attr.state != IB_PORT_ACTIVE) { 369 ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); 370 return; 371 } 372 373 rtnl_lock(); 374 netif_carrier_on(priv->dev); 375 rtnl_unlock(); 376} 377 378static int ipoib_mcast_join_complete(int status, 379 struct ib_sa_multicast *multicast) 380{ 381 struct ipoib_mcast *mcast = multicast->context; 382 struct net_device *dev = mcast->dev; 383 struct ipoib_dev_priv *priv = netdev_priv(dev); 384 385 ipoib_dbg_mcast(priv, "join completion for %pI6 (status %d)\n", 386 mcast->mcmember.mgid.raw, status); 387 388 /* We trap for port events ourselves. */ 389 if (status == -ENETRESET) { 390 status = 0; 391 goto out; 392 } 393 394 if (!status) 395 status = ipoib_mcast_join_finish(mcast, &multicast->rec); 396 397 if (!status) { 398 mcast->backoff = 1; 399 mutex_lock(&mcast_mutex); 400 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 401 queue_delayed_work(ipoib_workqueue, 402 &priv->mcast_task, 0); 403 mutex_unlock(&mcast_mutex); 404 405 /* 406 * Defer carrier on work to ipoib_workqueue to avoid a 407 * deadlock on rtnl_lock here. 408 */ 409 if (mcast == priv->broadcast) 410 queue_work(ipoib_workqueue, &priv->carrier_on_task); 411 412 status = 0; 413 goto out; 414 } 415 416 if (mcast->logcount++ < 20) { 417 if (status == -ETIMEDOUT || status == -EAGAIN) { 418 ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n", 419 mcast->mcmember.mgid.raw, status); 420 } else { 421 ipoib_warn(priv, "multicast join failed for %pI6, status %d\n", 422 mcast->mcmember.mgid.raw, status); 423 } 424 } 425 426 mcast->backoff *= 2; 427 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 428 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 429 430 /* Clear the busy flag so we try again */ 431 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 432 433 mutex_lock(&mcast_mutex); 434 spin_lock_irq(&priv->lock); 435 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 436 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 437 mcast->backoff * HZ); 438 spin_unlock_irq(&priv->lock); 439 mutex_unlock(&mcast_mutex); 440out: 441 complete(&mcast->done); 442 return status; 443} 444 445static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, 446 int create) 447{ 448 struct ipoib_dev_priv *priv = netdev_priv(dev); 449 struct ib_sa_mcmember_rec rec = { 450 .join_state = 1 451 }; 452 ib_sa_comp_mask comp_mask; 453 int ret = 0; 454 455 ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw); 456 457 rec.mgid = mcast->mcmember.mgid; 458 rec.port_gid = priv->local_gid; 459 rec.pkey = cpu_to_be16(priv->pkey); 460 461 comp_mask = 462 IB_SA_MCMEMBER_REC_MGID | 463 IB_SA_MCMEMBER_REC_PORT_GID | 464 IB_SA_MCMEMBER_REC_PKEY | 465 IB_SA_MCMEMBER_REC_JOIN_STATE; 466 467 if (create) { 468 comp_mask |= 469 IB_SA_MCMEMBER_REC_QKEY | 470 IB_SA_MCMEMBER_REC_MTU_SELECTOR | 471 IB_SA_MCMEMBER_REC_MTU | 472 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | 473 IB_SA_MCMEMBER_REC_RATE_SELECTOR | 474 IB_SA_MCMEMBER_REC_RATE | 475 IB_SA_MCMEMBER_REC_SL | 476 IB_SA_MCMEMBER_REC_FLOW_LABEL | 477 IB_SA_MCMEMBER_REC_HOP_LIMIT; 478 479 rec.qkey = priv->broadcast->mcmember.qkey; 480 rec.mtu_selector = IB_SA_EQ; 481 rec.mtu = priv->broadcast->mcmember.mtu; 482 rec.traffic_class = priv->broadcast->mcmember.traffic_class; 483 rec.rate_selector = IB_SA_EQ; 484 rec.rate = priv->broadcast->mcmember.rate; 485 rec.sl = priv->broadcast->mcmember.sl; 486 rec.flow_label = priv->broadcast->mcmember.flow_label; 487 rec.hop_limit = priv->broadcast->mcmember.hop_limit; 488 } 489 490 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 491 init_completion(&mcast->done); 492 set_bit(IPOIB_MCAST_JOIN_STARTED, &mcast->flags); 493 494 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, 495 &rec, comp_mask, GFP_KERNEL, 496 ipoib_mcast_join_complete, mcast); 497 if (IS_ERR(mcast->mc)) { 498 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); 499 complete(&mcast->done); 500 ret = PTR_ERR(mcast->mc); 501 ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); 502 503 mcast->backoff *= 2; 504 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) 505 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; 506 507 mutex_lock(&mcast_mutex); 508 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 509 queue_delayed_work(ipoib_workqueue, 510 &priv->mcast_task, 511 mcast->backoff * HZ); 512 mutex_unlock(&mcast_mutex); 513 } 514} 515 516void ipoib_mcast_join_task(struct work_struct *work) 517{ 518 struct ipoib_dev_priv *priv = 519 container_of(work, struct ipoib_dev_priv, mcast_task.work); 520 struct net_device *dev = priv->dev; 521 struct ib_port_attr port_attr; 522 523 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) 524 return; 525 526 if (ib_query_port(priv->ca, priv->port, &port_attr) || 527 port_attr.state != IB_PORT_ACTIVE) { 528 ipoib_dbg(priv, "port state is not ACTIVE (state = %d) suspending join task\n", 529 port_attr.state); 530 return; 531 } 532 priv->local_lid = port_attr.lid; 533 534 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) 535 ipoib_warn(priv, "ib_query_gid() failed\n"); 536 else 537 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); 538 539 if (!priv->broadcast) { 540 struct ipoib_mcast *broadcast; 541 542 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 543 return; 544 545 broadcast = ipoib_mcast_alloc(dev, 1); 546 if (!broadcast) { 547 ipoib_warn(priv, "failed to allocate broadcast group\n"); 548 mutex_lock(&mcast_mutex); 549 if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) 550 queue_delayed_work(ipoib_workqueue, 551 &priv->mcast_task, HZ); 552 mutex_unlock(&mcast_mutex); 553 return; 554 } 555 556 spin_lock_irq(&priv->lock); 557 memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, 558 sizeof (union ib_gid)); 559 priv->broadcast = broadcast; 560 561 __ipoib_mcast_add(dev, priv->broadcast); 562 spin_unlock_irq(&priv->lock); 563 } 564 565 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 566 if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) 567 ipoib_mcast_join(dev, priv->broadcast, 0); 568 return; 569 } 570 571 while (1) { 572 struct ipoib_mcast *mcast = NULL; 573 574 spin_lock_irq(&priv->lock); 575 list_for_each_entry(mcast, &priv->multicast_list, list) { 576 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) 577 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) 578 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 579 /* Found the next unjoined group */ 580 break; 581 } 582 } 583 spin_unlock_irq(&priv->lock); 584 585 if (&mcast->list == &priv->multicast_list) { 586 /* All done */ 587 break; 588 } 589 590 ipoib_mcast_join(dev, mcast, 1); 591 return; 592 } 593 594 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); 595 596 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 597} 598 599int ipoib_mcast_start_thread(struct net_device *dev) 600{ 601 struct ipoib_dev_priv *priv = netdev_priv(dev); 602 603 ipoib_dbg_mcast(priv, "starting multicast thread\n"); 604 605 mutex_lock(&mcast_mutex); 606 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) 607 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0); 608 mutex_unlock(&mcast_mutex); 609 610 return 0; 611} 612 613int ipoib_mcast_stop_thread(struct net_device *dev, int flush) 614{ 615 struct ipoib_dev_priv *priv = netdev_priv(dev); 616 617 ipoib_dbg_mcast(priv, "stopping multicast thread\n"); 618 619 mutex_lock(&mcast_mutex); 620 clear_bit(IPOIB_MCAST_RUN, &priv->flags); 621 cancel_delayed_work(&priv->mcast_task); 622 mutex_unlock(&mcast_mutex); 623 624 if (flush) 625 flush_workqueue(ipoib_workqueue); 626 627 return 0; 628} 629 630static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) 631{ 632 struct ipoib_dev_priv *priv = netdev_priv(dev); 633 int ret = 0; 634 635 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) 636 ib_sa_free_multicast(mcast->mc); 637 638 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { 639 ipoib_dbg_mcast(priv, "leaving MGID %pI6\n", 640 mcast->mcmember.mgid.raw); 641 642 /* Remove ourselves from the multicast group */ 643 ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, 644 be16_to_cpu(mcast->mcmember.mlid)); 645 if (ret) 646 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); 647 } 648 649 return 0; 650} 651 652void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb) 653{ 654 struct ipoib_dev_priv *priv = netdev_priv(dev); 655 struct ipoib_mcast *mcast; 656 unsigned long flags; 657 void *mgid = daddr + 4; 658 659 spin_lock_irqsave(&priv->lock, flags); 660 661 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || 662 !priv->broadcast || 663 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { 664 ++dev->stats.tx_dropped; 665 dev_kfree_skb_any(skb); 666 goto unlock; 667 } 668 669 mcast = __ipoib_mcast_find(dev, mgid); 670 if (!mcast) { 671 /* Let's create a new send only group now */ 672 ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n", 673 mgid); 674 675 mcast = ipoib_mcast_alloc(dev, 0); 676 if (!mcast) { 677 ipoib_warn(priv, "unable to allocate memory for " 678 "multicast structure\n"); 679 ++dev->stats.tx_dropped; 680 dev_kfree_skb_any(skb); 681 goto out; 682 } 683 684 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); 685 memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid)); 686 __ipoib_mcast_add(dev, mcast); 687 list_add_tail(&mcast->list, &priv->multicast_list); 688 } 689 690 if (!mcast->ah) { 691 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) 692 skb_queue_tail(&mcast->pkt_queue, skb); 693 else { 694 ++dev->stats.tx_dropped; 695 dev_kfree_skb_any(skb); 696 } 697 698 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) 699 ipoib_dbg_mcast(priv, "no address vector, " 700 "but multicast join already started\n"); 701 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) 702 ipoib_mcast_sendonly_join(mcast); 703 704 /* 705 * If lookup completes between here and out:, don't 706 * want to send packet twice. 707 */ 708 mcast = NULL; 709 } 710 711out: 712 if (mcast && mcast->ah) { 713 struct ipoib_neigh *neigh; 714 715 spin_unlock_irqrestore(&priv->lock, flags); 716 neigh = ipoib_neigh_get(dev, daddr); 717 spin_lock_irqsave(&priv->lock, flags); 718 if (!neigh) { 719 neigh = ipoib_neigh_alloc(daddr, dev); 720 if (neigh) { 721 kref_get(&mcast->ah->ref); 722 neigh->ah = mcast->ah; 723 list_add_tail(&neigh->list, &mcast->neigh_list); 724 } 725 } 726 spin_unlock_irqrestore(&priv->lock, flags); 727 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); 728 if (neigh) 729 ipoib_neigh_put(neigh); 730 return; 731 } 732 733unlock: 734 spin_unlock_irqrestore(&priv->lock, flags); 735} 736 737void ipoib_mcast_dev_flush(struct net_device *dev) 738{ 739 struct ipoib_dev_priv *priv = netdev_priv(dev); 740 LIST_HEAD(remove_list); 741 struct ipoib_mcast *mcast, *tmcast; 742 unsigned long flags; 743 744 ipoib_dbg_mcast(priv, "flushing multicast list\n"); 745 746 spin_lock_irqsave(&priv->lock, flags); 747 748 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 749 list_del(&mcast->list); 750 rb_erase(&mcast->rb_node, &priv->multicast_tree); 751 list_add_tail(&mcast->list, &remove_list); 752 } 753 754 if (priv->broadcast) { 755 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); 756 list_add_tail(&priv->broadcast->list, &remove_list); 757 priv->broadcast = NULL; 758 } 759 760 spin_unlock_irqrestore(&priv->lock, flags); 761 762 /* seperate between the wait to the leave*/ 763 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) 764 if (test_bit(IPOIB_MCAST_JOIN_STARTED, &mcast->flags)) 765 wait_for_completion(&mcast->done); 766 767 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 768 ipoib_mcast_leave(dev, mcast); 769 ipoib_mcast_free(mcast); 770 } 771} 772 773static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast) 774{ 775 /* reserved QPN, prefix, scope */ 776 if (memcmp(addr, broadcast, 6)) 777 return 0; 778 /* signature lower, pkey */ 779 if (memcmp(addr + 7, broadcast + 7, 3)) 780 return 0; 781 return 1; 782} 783 784void ipoib_mcast_restart_task(struct work_struct *work) 785{ 786 struct ipoib_dev_priv *priv = 787 container_of(work, struct ipoib_dev_priv, restart_task); 788 struct net_device *dev = priv->dev; 789 struct netdev_hw_addr *ha; 790 struct ipoib_mcast *mcast, *tmcast; 791 LIST_HEAD(remove_list); 792 unsigned long flags; 793 struct ib_sa_mcmember_rec rec; 794 795 ipoib_dbg_mcast(priv, "restarting multicast task\n"); 796 797 ipoib_mcast_stop_thread(dev, 0); 798 799 local_irq_save(flags); 800 netif_addr_lock(dev); 801 spin_lock(&priv->lock); 802 803 /* 804 * Unfortunately, the networking core only gives us a list of all of 805 * the multicast hardware addresses. We need to figure out which ones 806 * are new and which ones have been removed 807 */ 808 809 /* Clear out the found flag */ 810 list_for_each_entry(mcast, &priv->multicast_list, list) 811 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 812 813 /* Mark all of the entries that are found or don't exist */ 814 netdev_for_each_mc_addr(ha, dev) { 815 union ib_gid mgid; 816 817 if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast)) 818 continue; 819 820 memcpy(mgid.raw, ha->addr + 4, sizeof mgid); 821 822 mcast = __ipoib_mcast_find(dev, &mgid); 823 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 824 struct ipoib_mcast *nmcast; 825 826 /* ignore group which is directly joined by userspace */ 827 if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && 828 !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { 829 ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n", 830 mgid.raw); 831 continue; 832 } 833 834 /* Not found or send-only group, let's add a new entry */ 835 ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n", 836 mgid.raw); 837 838 nmcast = ipoib_mcast_alloc(dev, 0); 839 if (!nmcast) { 840 ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); 841 continue; 842 } 843 844 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); 845 846 nmcast->mcmember.mgid = mgid; 847 848 if (mcast) { 849 /* Destroy the send only entry */ 850 list_move_tail(&mcast->list, &remove_list); 851 852 rb_replace_node(&mcast->rb_node, 853 &nmcast->rb_node, 854 &priv->multicast_tree); 855 } else 856 __ipoib_mcast_add(dev, nmcast); 857 858 list_add_tail(&nmcast->list, &priv->multicast_list); 859 } 860 861 if (mcast) 862 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); 863 } 864 865 /* Remove all of the entries don't exist anymore */ 866 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { 867 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && 868 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { 869 ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n", 870 mcast->mcmember.mgid.raw); 871 872 rb_erase(&mcast->rb_node, &priv->multicast_tree); 873 874 /* Move to the remove list */ 875 list_move_tail(&mcast->list, &remove_list); 876 } 877 } 878 879 spin_unlock(&priv->lock); 880 netif_addr_unlock(dev); 881 local_irq_restore(flags); 882 883 /* We have to cancel outside of the spinlock */ 884 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { 885 ipoib_mcast_leave(mcast->dev, mcast); 886 ipoib_mcast_free(mcast); 887 } 888 889 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) 890 ipoib_mcast_start_thread(dev); 891} 892 893#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 894 895struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) 896{ 897 struct ipoib_mcast_iter *iter; 898 899 iter = kmalloc(sizeof *iter, GFP_KERNEL); 900 if (!iter) 901 return NULL; 902 903 iter->dev = dev; 904 memset(iter->mgid.raw, 0, 16); 905 906 if (ipoib_mcast_iter_next(iter)) { 907 kfree(iter); 908 return NULL; 909 } 910 911 return iter; 912} 913 914int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) 915{ 916 struct ipoib_dev_priv *priv = netdev_priv(iter->dev); 917 struct rb_node *n; 918 struct ipoib_mcast *mcast; 919 int ret = 1; 920 921 spin_lock_irq(&priv->lock); 922 923 n = rb_first(&priv->multicast_tree); 924 925 while (n) { 926 mcast = rb_entry(n, struct ipoib_mcast, rb_node); 927 928 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, 929 sizeof (union ib_gid)) < 0) { 930 iter->mgid = mcast->mcmember.mgid; 931 iter->created = mcast->created; 932 iter->queuelen = skb_queue_len(&mcast->pkt_queue); 933 iter->complete = !!mcast->ah; 934 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); 935 936 ret = 0; 937 938 break; 939 } 940 941 n = rb_next(n); 942 } 943 944 spin_unlock_irq(&priv->lock); 945 946 return ret; 947} 948 949void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, 950 union ib_gid *mgid, 951 unsigned long *created, 952 unsigned int *queuelen, 953 unsigned int *complete, 954 unsigned int *send_only) 955{ 956 *mgid = iter->mgid; 957 *created = iter->created; 958 *queuelen = iter->queuelen; 959 *complete = iter->complete; 960 *send_only = iter->send_only; 961} 962 963#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 964