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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
4 | * Copyright (c) 2004 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
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. | |
1da177e4 LT |
33 | */ |
34 | ||
35 | #include <linux/skbuff.h> | |
36 | #include <linux/rtnetlink.h> | |
37 | #include <linux/ip.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/igmp.h> | |
40 | #include <linux/inetdevice.h> | |
41 | #include <linux/delay.h> | |
42 | #include <linux/completion.h> | |
43 | ||
14c85021 ACM |
44 | #include <net/dst.h> |
45 | ||
1da177e4 LT |
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 | ||
95ed644f | 56 | static DEFINE_MUTEX(mcast_mutex); |
1da177e4 | 57 | |
1da177e4 LT |
58 | struct ipoib_mcast_iter { |
59 | struct net_device *dev; | |
60 | union ib_gid mgid; | |
61 | unsigned long created; | |
62 | unsigned int queuelen; | |
63 | unsigned int complete; | |
64 | unsigned int send_only; | |
65 | }; | |
66 | ||
67 | static void ipoib_mcast_free(struct ipoib_mcast *mcast) | |
68 | { | |
69 | struct net_device *dev = mcast->dev; | |
70 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
71 | struct ipoib_neigh *neigh, *tmp; | |
b36f170b | 72 | int tx_dropped = 0; |
1da177e4 LT |
73 | |
74 | ipoib_dbg_mcast(netdev_priv(dev), | |
75 | "deleting multicast group " IPOIB_GID_FMT "\n", | |
76 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
77 | ||
943c246e | 78 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
79 | |
80 | list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { | |
97460df3 EC |
81 | /* |
82 | * It's safe to call ipoib_put_ah() inside priv->lock | |
83 | * here, because we know that mcast->ah will always | |
84 | * hold one more reference, so ipoib_put_ah() will | |
85 | * never do more than decrement the ref count. | |
86 | */ | |
1da177e4 | 87 | if (neigh->ah) |
97460df3 | 88 | ipoib_put_ah(neigh->ah); |
2745b5b7 | 89 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
90 | } |
91 | ||
943c246e | 92 | spin_unlock_irq(&priv->lock); |
1da177e4 | 93 | |
1da177e4 LT |
94 | if (mcast->ah) |
95 | ipoib_put_ah(mcast->ah); | |
96 | ||
b36f170b MT |
97 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
98 | ++tx_dropped; | |
8c608a32 | 99 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
100 | } |
101 | ||
943c246e | 102 | netif_tx_lock_bh(dev); |
de903512 | 103 | dev->stats.tx_dropped += tx_dropped; |
943c246e | 104 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
105 | |
106 | kfree(mcast); | |
107 | } | |
108 | ||
109 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
110 | int can_sleep) | |
111 | { | |
112 | struct ipoib_mcast *mcast; | |
113 | ||
de6eb66b | 114 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
115 | if (!mcast) |
116 | return NULL; | |
117 | ||
1da177e4 LT |
118 | mcast->dev = dev; |
119 | mcast->created = jiffies; | |
ce5b65cc | 120 | mcast->backoff = 1; |
1da177e4 LT |
121 | |
122 | INIT_LIST_HEAD(&mcast->list); | |
123 | INIT_LIST_HEAD(&mcast->neigh_list); | |
124 | skb_queue_head_init(&mcast->pkt_queue); | |
125 | ||
1da177e4 LT |
126 | return mcast; |
127 | } | |
128 | ||
37c22a77 | 129 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) |
1da177e4 LT |
130 | { |
131 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
132 | struct rb_node *n = priv->multicast_tree.rb_node; | |
133 | ||
134 | while (n) { | |
135 | struct ipoib_mcast *mcast; | |
136 | int ret; | |
137 | ||
138 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
139 | ||
37c22a77 | 140 | ret = memcmp(mgid, mcast->mcmember.mgid.raw, |
1da177e4 LT |
141 | sizeof (union ib_gid)); |
142 | if (ret < 0) | |
143 | n = n->rb_left; | |
144 | else if (ret > 0) | |
145 | n = n->rb_right; | |
146 | else | |
147 | return mcast; | |
148 | } | |
149 | ||
150 | return NULL; | |
151 | } | |
152 | ||
153 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
154 | { | |
155 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
156 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
157 | ||
158 | while (*n) { | |
159 | struct ipoib_mcast *tmcast; | |
160 | int ret; | |
161 | ||
162 | pn = *n; | |
163 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
164 | ||
165 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
166 | sizeof (union ib_gid)); | |
167 | if (ret < 0) | |
168 | n = &pn->rb_left; | |
169 | else if (ret > 0) | |
170 | n = &pn->rb_right; | |
171 | else | |
172 | return -EEXIST; | |
173 | } | |
174 | ||
175 | rb_link_node(&mcast->rb_node, pn, n); | |
176 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
182 | struct ib_sa_mcmember_rec *mcmember) | |
183 | { | |
184 | struct net_device *dev = mcast->dev; | |
185 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7343b231 | 186 | struct ipoib_ah *ah; |
1da177e4 | 187 | int ret; |
d0de1362 | 188 | int set_qkey = 0; |
1da177e4 LT |
189 | |
190 | mcast->mcmember = *mcmember; | |
191 | ||
192 | /* Set the cached Q_Key before we attach if it's the broadcast group */ | |
193 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
194 | sizeof (union ib_gid))) { | |
e1d50dce JM |
195 | spin_lock_irq(&priv->lock); |
196 | if (!priv->broadcast) { | |
197 | spin_unlock_irq(&priv->lock); | |
198 | return -EAGAIN; | |
199 | } | |
1da177e4 | 200 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); |
e1d50dce | 201 | spin_unlock_irq(&priv->lock); |
1da177e4 | 202 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; |
d0de1362 | 203 | set_qkey = 1; |
1da177e4 LT |
204 | } |
205 | ||
206 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
207 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
208 | ipoib_warn(priv, "multicast group " IPOIB_GID_FMT | |
209 | " already attached\n", | |
210 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
d0de1362 | 216 | &mcast->mcmember.mgid, set_qkey); |
1da177e4 LT |
217 | if (ret < 0) { |
218 | ipoib_warn(priv, "couldn't attach QP to multicast group " | |
219 | IPOIB_GID_FMT "\n", | |
220 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
221 | ||
222 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
223 | return ret; | |
224 | } | |
225 | } | |
226 | ||
227 | { | |
228 | struct ib_ah_attr av = { | |
229 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
230 | .port_num = priv->port, | |
231 | .sl = mcast->mcmember.sl, | |
232 | .ah_flags = IB_AH_GRH, | |
bf6a9e31 | 233 | .static_rate = mcast->mcmember.rate, |
1da177e4 LT |
234 | .grh = { |
235 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
236 | .hop_limit = mcast->mcmember.hop_limit, | |
237 | .sgid_index = 0, | |
238 | .traffic_class = mcast->mcmember.traffic_class | |
239 | } | |
240 | }; | |
1da177e4 LT |
241 | av.grh.dgid = mcast->mcmember.mgid; |
242 | ||
7343b231 EC |
243 | ah = ipoib_create_ah(dev, priv->pd, &av); |
244 | if (!ah) { | |
1da177e4 LT |
245 | ipoib_warn(priv, "ib_address_create failed\n"); |
246 | } else { | |
624d01f8 OG |
247 | spin_lock_irq(&priv->lock); |
248 | mcast->ah = ah; | |
249 | spin_unlock_irq(&priv->lock); | |
250 | ||
1da177e4 LT |
251 | ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT |
252 | " AV %p, LID 0x%04x, SL %d\n", | |
253 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
254 | mcast->ah->ah, | |
255 | be16_to_cpu(mcast->mcmember.mlid), | |
256 | mcast->mcmember.sl); | |
257 | } | |
258 | } | |
259 | ||
260 | /* actually send any queued packets */ | |
943c246e | 261 | netif_tx_lock_bh(dev); |
1da177e4 LT |
262 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
263 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
943c246e | 264 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
265 | |
266 | skb->dev = dev; | |
267 | ||
268 | if (!skb->dst || !skb->dst->neighbour) { | |
269 | /* put pseudoheader back on for next time */ | |
270 | skb_push(skb, sizeof (struct ipoib_pseudoheader)); | |
271 | } | |
272 | ||
273 | if (dev_queue_xmit(skb)) | |
274 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
943c246e | 275 | netif_tx_lock_bh(dev); |
1da177e4 | 276 | } |
943c246e | 277 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
278 | |
279 | return 0; | |
280 | } | |
281 | ||
faec2f7b | 282 | static int |
1da177e4 | 283 | ipoib_mcast_sendonly_join_complete(int status, |
faec2f7b | 284 | struct ib_sa_multicast *multicast) |
1da177e4 | 285 | { |
faec2f7b | 286 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
287 | struct net_device *dev = mcast->dev; |
288 | ||
faec2f7b SH |
289 | /* We trap for port events ourselves. */ |
290 | if (status == -ENETRESET) | |
291 | return 0; | |
292 | ||
1da177e4 | 293 | if (!status) |
faec2f7b SH |
294 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); |
295 | ||
296 | if (status) { | |
1da177e4 LT |
297 | if (mcast->logcount++ < 20) |
298 | ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for " | |
299 | IPOIB_GID_FMT ", status %d\n", | |
300 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
301 | ||
302 | /* Flush out any queued packets */ | |
943c246e | 303 | netif_tx_lock_bh(dev); |
b36f170b | 304 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
de903512 | 305 | ++dev->stats.tx_dropped; |
8c608a32 | 306 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b | 307 | } |
943c246e | 308 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
309 | |
310 | /* Clear the busy flag so we try again */ | |
faec2f7b SH |
311 | status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, |
312 | &mcast->flags); | |
1da177e4 | 313 | } |
faec2f7b | 314 | return status; |
1da177e4 LT |
315 | } |
316 | ||
317 | static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) | |
318 | { | |
319 | struct net_device *dev = mcast->dev; | |
320 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
321 | struct ib_sa_mcmember_rec rec = { | |
322 | #if 0 /* Some SMs don't support send-only yet */ | |
323 | .join_state = 4 | |
324 | #else | |
325 | .join_state = 1 | |
326 | #endif | |
327 | }; | |
328 | int ret = 0; | |
329 | ||
330 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
331 | ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); | |
332 | return -ENODEV; | |
333 | } | |
334 | ||
335 | if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { | |
336 | ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); | |
337 | return -EBUSY; | |
338 | } | |
339 | ||
340 | rec.mgid = mcast->mcmember.mgid; | |
341 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 342 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 | 343 | |
faec2f7b SH |
344 | mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, |
345 | priv->port, &rec, | |
346 | IB_SA_MCMEMBER_REC_MGID | | |
347 | IB_SA_MCMEMBER_REC_PORT_GID | | |
348 | IB_SA_MCMEMBER_REC_PKEY | | |
349 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
350 | GFP_ATOMIC, | |
351 | ipoib_mcast_sendonly_join_complete, | |
352 | mcast); | |
353 | if (IS_ERR(mcast->mc)) { | |
354 | ret = PTR_ERR(mcast->mc); | |
355 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
356 | ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n", | |
1da177e4 LT |
357 | ret); |
358 | } else { | |
359 | ipoib_dbg_mcast(priv, "no multicast record for " IPOIB_GID_FMT | |
360 | ", starting join\n", | |
361 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
1da177e4 LT |
362 | } |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
e8224e4b YE |
367 | void ipoib_mcast_carrier_on_task(struct work_struct *work) |
368 | { | |
369 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
370 | carrier_on_task); | |
371 | ||
372 | /* | |
373 | * Take rtnl_lock to avoid racing with ipoib_stop() and | |
374 | * turning the carrier back on while a device is being | |
375 | * removed. | |
376 | */ | |
377 | rtnl_lock(); | |
378 | netif_carrier_on(priv->dev); | |
379 | rtnl_unlock(); | |
380 | } | |
381 | ||
faec2f7b SH |
382 | static int ipoib_mcast_join_complete(int status, |
383 | struct ib_sa_multicast *multicast) | |
1da177e4 | 384 | { |
faec2f7b | 385 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
386 | struct net_device *dev = mcast->dev; |
387 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
388 | ||
389 | ipoib_dbg_mcast(priv, "join completion for " IPOIB_GID_FMT | |
390 | " (status %d)\n", | |
391 | IPOIB_GID_ARG(mcast->mcmember.mgid), status); | |
392 | ||
faec2f7b SH |
393 | /* We trap for port events ourselves. */ |
394 | if (status == -ENETRESET) | |
395 | return 0; | |
396 | ||
397 | if (!status) | |
398 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); | |
399 | ||
400 | if (!status) { | |
ce5b65cc | 401 | mcast->backoff = 1; |
95ed644f | 402 | mutex_lock(&mcast_mutex); |
1da177e4 | 403 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
c4028958 DH |
404 | queue_delayed_work(ipoib_workqueue, |
405 | &priv->mcast_task, 0); | |
95ed644f | 406 | mutex_unlock(&mcast_mutex); |
55c9adde | 407 | |
e8224e4b YE |
408 | /* |
409 | * Defer carrier on work to ipoib_workqueue to avoid a | |
410 | * deadlock on rtnl_lock here. | |
411 | */ | |
412 | if (mcast == priv->broadcast) | |
413 | queue_work(ipoib_workqueue, &priv->carrier_on_task); | |
55c9adde | 414 | |
faec2f7b | 415 | return 0; |
1da177e4 LT |
416 | } |
417 | ||
faec2f7b SH |
418 | if (mcast->logcount++ < 20) { |
419 | if (status == -ETIMEDOUT) { | |
1da177e4 LT |
420 | ipoib_dbg_mcast(priv, "multicast join failed for " IPOIB_GID_FMT |
421 | ", status %d\n", | |
422 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
423 | status); | |
424 | } else { | |
425 | ipoib_warn(priv, "multicast join failed for " | |
426 | IPOIB_GID_FMT ", status %d\n", | |
427 | IPOIB_GID_ARG(mcast->mcmember.mgid), | |
428 | status); | |
429 | } | |
430 | } | |
431 | ||
432 | mcast->backoff *= 2; | |
433 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
434 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
435 | ||
faec2f7b SH |
436 | /* Clear the busy flag so we try again */ |
437 | status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
9acf6a85 | 438 | |
faec2f7b | 439 | mutex_lock(&mcast_mutex); |
9acf6a85 | 440 | spin_lock_irq(&priv->lock); |
faec2f7b SH |
441 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
442 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, | |
443 | mcast->backoff * HZ); | |
9acf6a85 | 444 | spin_unlock_irq(&priv->lock); |
95ed644f | 445 | mutex_unlock(&mcast_mutex); |
1da177e4 | 446 | |
faec2f7b | 447 | return status; |
1da177e4 LT |
448 | } |
449 | ||
450 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
451 | int create) | |
452 | { | |
453 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
454 | struct ib_sa_mcmember_rec rec = { | |
455 | .join_state = 1 | |
456 | }; | |
457 | ib_sa_comp_mask comp_mask; | |
458 | int ret = 0; | |
459 | ||
460 | ipoib_dbg_mcast(priv, "joining MGID " IPOIB_GID_FMT "\n", | |
461 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
462 | ||
463 | rec.mgid = mcast->mcmember.mgid; | |
464 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 465 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
466 | |
467 | comp_mask = | |
468 | IB_SA_MCMEMBER_REC_MGID | | |
469 | IB_SA_MCMEMBER_REC_PORT_GID | | |
470 | IB_SA_MCMEMBER_REC_PKEY | | |
471 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
472 | ||
473 | if (create) { | |
474 | comp_mask |= | |
d0df6d6d RD |
475 | IB_SA_MCMEMBER_REC_QKEY | |
476 | IB_SA_MCMEMBER_REC_MTU_SELECTOR | | |
477 | IB_SA_MCMEMBER_REC_MTU | | |
478 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | | |
479 | IB_SA_MCMEMBER_REC_RATE_SELECTOR | | |
480 | IB_SA_MCMEMBER_REC_RATE | | |
481 | IB_SA_MCMEMBER_REC_SL | | |
482 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
483 | IB_SA_MCMEMBER_REC_HOP_LIMIT; | |
1da177e4 LT |
484 | |
485 | rec.qkey = priv->broadcast->mcmember.qkey; | |
d0df6d6d RD |
486 | rec.mtu_selector = IB_SA_EQ; |
487 | rec.mtu = priv->broadcast->mcmember.mtu; | |
488 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
489 | rec.rate_selector = IB_SA_EQ; | |
490 | rec.rate = priv->broadcast->mcmember.rate; | |
1da177e4 LT |
491 | rec.sl = priv->broadcast->mcmember.sl; |
492 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
d0df6d6d | 493 | rec.hop_limit = priv->broadcast->mcmember.hop_limit; |
1da177e4 LT |
494 | } |
495 | ||
faec2f7b SH |
496 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
497 | mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, | |
498 | &rec, comp_mask, GFP_KERNEL, | |
499 | ipoib_mcast_join_complete, mcast); | |
500 | if (IS_ERR(mcast->mc)) { | |
501 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
502 | ret = PTR_ERR(mcast->mc); | |
503 | ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); | |
1da177e4 LT |
504 | |
505 | mcast->backoff *= 2; | |
506 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
507 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
508 | ||
95ed644f | 509 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
510 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
511 | queue_delayed_work(ipoib_workqueue, | |
512 | &priv->mcast_task, | |
ce5b65cc | 513 | mcast->backoff * HZ); |
95ed644f | 514 | mutex_unlock(&mcast_mutex); |
faec2f7b | 515 | } |
1da177e4 LT |
516 | } |
517 | ||
c4028958 | 518 | void ipoib_mcast_join_task(struct work_struct *work) |
1da177e4 | 519 | { |
c4028958 DH |
520 | struct ipoib_dev_priv *priv = |
521 | container_of(work, struct ipoib_dev_priv, mcast_task.work); | |
522 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
523 | |
524 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
525 | return; | |
526 | ||
527 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) | |
24bd1e4e | 528 | ipoib_warn(priv, "ib_query_gid() failed\n"); |
1da177e4 LT |
529 | else |
530 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
531 | ||
532 | { | |
533 | struct ib_port_attr attr; | |
534 | ||
658bcef6 RD |
535 | if (!ib_query_port(priv->ca, priv->port, &attr)) |
536 | priv->local_lid = attr.lid; | |
537 | else | |
faec2f7b | 538 | ipoib_warn(priv, "ib_query_port failed\n"); |
1da177e4 LT |
539 | } |
540 | ||
541 | if (!priv->broadcast) { | |
20b83382 RD |
542 | struct ipoib_mcast *broadcast; |
543 | ||
544 | broadcast = ipoib_mcast_alloc(dev, 1); | |
545 | if (!broadcast) { | |
1da177e4 | 546 | ipoib_warn(priv, "failed to allocate broadcast group\n"); |
95ed644f | 547 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
548 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
549 | queue_delayed_work(ipoib_workqueue, | |
550 | &priv->mcast_task, HZ); | |
95ed644f | 551 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
552 | return; |
553 | } | |
554 | ||
20b83382 RD |
555 | spin_lock_irq(&priv->lock); |
556 | memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
1da177e4 | 557 | sizeof (union ib_gid)); |
20b83382 | 558 | priv->broadcast = broadcast; |
1da177e4 | 559 | |
1da177e4 LT |
560 | __ipoib_mcast_add(dev, priv->broadcast); |
561 | spin_unlock_irq(&priv->lock); | |
562 | } | |
563 | ||
564 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
faec2f7b SH |
565 | if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) |
566 | ipoib_mcast_join(dev, priv->broadcast, 0); | |
1da177e4 LT |
567 | return; |
568 | } | |
569 | ||
570 | while (1) { | |
571 | struct ipoib_mcast *mcast = NULL; | |
572 | ||
573 | spin_lock_irq(&priv->lock); | |
574 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
575 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) | |
576 | && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) | |
577 | && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
578 | /* Found the next unjoined group */ | |
579 | break; | |
580 | } | |
581 | } | |
582 | spin_unlock_irq(&priv->lock); | |
583 | ||
584 | if (&mcast->list == &priv->multicast_list) { | |
585 | /* All done */ | |
586 | break; | |
587 | } | |
588 | ||
589 | ipoib_mcast_join(dev, mcast, 1); | |
590 | return; | |
591 | } | |
592 | ||
bc7b3a36 | 593 | priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); |
839fcaba | 594 | |
c8c2afe3 EC |
595 | if (!ipoib_cm_admin_enabled(dev)) { |
596 | rtnl_lock(); | |
bd360671 | 597 | dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu)); |
c8c2afe3 EC |
598 | rtnl_unlock(); |
599 | } | |
1da177e4 LT |
600 | |
601 | ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); | |
602 | ||
603 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); | |
1da177e4 LT |
604 | } |
605 | ||
606 | int ipoib_mcast_start_thread(struct net_device *dev) | |
607 | { | |
608 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
609 | ||
610 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
611 | ||
95ed644f | 612 | mutex_lock(&mcast_mutex); |
1da177e4 | 613 | if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) |
c4028958 | 614 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0); |
95ed644f | 615 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
616 | |
617 | return 0; | |
618 | } | |
619 | ||
8d2cae06 | 620 | int ipoib_mcast_stop_thread(struct net_device *dev, int flush) |
1da177e4 LT |
621 | { |
622 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
623 | |
624 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
625 | ||
95ed644f | 626 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
627 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
628 | cancel_delayed_work(&priv->mcast_task); | |
95ed644f | 629 | mutex_unlock(&mcast_mutex); |
1da177e4 | 630 | |
8d2cae06 RD |
631 | if (flush) |
632 | flush_workqueue(ipoib_workqueue); | |
1da177e4 | 633 | |
1da177e4 LT |
634 | return 0; |
635 | } | |
636 | ||
637 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
638 | { | |
639 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
640 | int ret = 0; |
641 | ||
e07832b6 SH |
642 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
643 | ib_sa_free_multicast(mcast->mc); | |
644 | ||
faec2f7b SH |
645 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { |
646 | ipoib_dbg_mcast(priv, "leaving MGID " IPOIB_GID_FMT "\n", | |
647 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
1da177e4 | 648 | |
faec2f7b | 649 | /* Remove ourselves from the multicast group */ |
9eae554c RD |
650 | ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, |
651 | be16_to_cpu(mcast->mcmember.mlid)); | |
faec2f7b | 652 | if (ret) |
9eae554c | 653 | ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); |
faec2f7b | 654 | } |
1da177e4 | 655 | |
1da177e4 LT |
656 | return 0; |
657 | } | |
658 | ||
37c22a77 | 659 | void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb) |
1da177e4 LT |
660 | { |
661 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
662 | struct ipoib_mcast *mcast; | |
943c246e | 663 | unsigned long flags; |
1da177e4 | 664 | |
943c246e | 665 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 666 | |
b3e2749b | 667 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || |
20b83382 RD |
668 | !priv->broadcast || |
669 | !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
de903512 | 670 | ++dev->stats.tx_dropped; |
479a0796 MT |
671 | dev_kfree_skb_any(skb); |
672 | goto unlock; | |
673 | } | |
674 | ||
1da177e4 LT |
675 | mcast = __ipoib_mcast_find(dev, mgid); |
676 | if (!mcast) { | |
677 | /* Let's create a new send only group now */ | |
678 | ipoib_dbg_mcast(priv, "setting up send only multicast group for " | |
37c22a77 | 679 | IPOIB_GID_FMT "\n", IPOIB_GID_RAW_ARG(mgid)); |
1da177e4 LT |
680 | |
681 | mcast = ipoib_mcast_alloc(dev, 0); | |
682 | if (!mcast) { | |
683 | ipoib_warn(priv, "unable to allocate memory for " | |
684 | "multicast structure\n"); | |
de903512 | 685 | ++dev->stats.tx_dropped; |
1da177e4 LT |
686 | dev_kfree_skb_any(skb); |
687 | goto out; | |
688 | } | |
689 | ||
690 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); | |
37c22a77 | 691 | memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid)); |
1da177e4 LT |
692 | __ipoib_mcast_add(dev, mcast); |
693 | list_add_tail(&mcast->list, &priv->multicast_list); | |
694 | } | |
695 | ||
696 | if (!mcast->ah) { | |
697 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) | |
698 | skb_queue_tail(&mcast->pkt_queue, skb); | |
b36f170b | 699 | else { |
de903512 | 700 | ++dev->stats.tx_dropped; |
1da177e4 | 701 | dev_kfree_skb_any(skb); |
b36f170b | 702 | } |
1da177e4 | 703 | |
faec2f7b | 704 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
1da177e4 LT |
705 | ipoib_dbg_mcast(priv, "no address vector, " |
706 | "but multicast join already started\n"); | |
707 | else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
708 | ipoib_mcast_sendonly_join(mcast); | |
709 | ||
710 | /* | |
711 | * If lookup completes between here and out:, don't | |
712 | * want to send packet twice. | |
713 | */ | |
714 | mcast = NULL; | |
715 | } | |
716 | ||
717 | out: | |
718 | if (mcast && mcast->ah) { | |
2337f809 | 719 | if (skb->dst && |
1da177e4 LT |
720 | skb->dst->neighbour && |
721 | !*to_ipoib_neigh(skb->dst->neighbour)) { | |
732a2170 MS |
722 | struct ipoib_neigh *neigh = ipoib_neigh_alloc(skb->dst->neighbour, |
723 | skb->dev); | |
1da177e4 LT |
724 | |
725 | if (neigh) { | |
726 | kref_get(&mcast->ah->ref); | |
2337f809 | 727 | neigh->ah = mcast->ah; |
1da177e4 LT |
728 | list_add_tail(&neigh->list, &mcast->neigh_list); |
729 | } | |
730 | } | |
731 | ||
732 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); | |
733 | } | |
734 | ||
479a0796 | 735 | unlock: |
943c246e | 736 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
737 | } |
738 | ||
739 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
740 | { | |
741 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
742 | LIST_HEAD(remove_list); | |
988bd503 | 743 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
744 | unsigned long flags; |
745 | ||
746 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
747 | ||
748 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 749 | |
988bd503 EC |
750 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
751 | list_del(&mcast->list); | |
752 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
753 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
754 | } |
755 | ||
756 | if (priv->broadcast) { | |
3cd96564 | 757 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
988bd503 EC |
758 | list_add_tail(&priv->broadcast->list, &remove_list); |
759 | priv->broadcast = NULL; | |
1da177e4 LT |
760 | } |
761 | ||
762 | spin_unlock_irqrestore(&priv->lock, flags); | |
763 | ||
764 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
765 | ipoib_mcast_leave(dev, mcast); | |
766 | ipoib_mcast_free(mcast); | |
767 | } | |
768 | } | |
769 | ||
c4028958 | 770 | void ipoib_mcast_restart_task(struct work_struct *work) |
1da177e4 | 771 | { |
c4028958 DH |
772 | struct ipoib_dev_priv *priv = |
773 | container_of(work, struct ipoib_dev_priv, restart_task); | |
774 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
775 | struct dev_mc_list *mclist; |
776 | struct ipoib_mcast *mcast, *tmcast; | |
777 | LIST_HEAD(remove_list); | |
778 | unsigned long flags; | |
335a64a5 | 779 | struct ib_sa_mcmember_rec rec; |
1da177e4 LT |
780 | |
781 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); | |
782 | ||
8d2cae06 | 783 | ipoib_mcast_stop_thread(dev, 0); |
1da177e4 | 784 | |
932ff279 | 785 | local_irq_save(flags); |
e308a5d8 | 786 | netif_addr_lock(dev); |
78bfe0b5 | 787 | spin_lock(&priv->lock); |
1da177e4 LT |
788 | |
789 | /* | |
790 | * Unfortunately, the networking core only gives us a list of all of | |
791 | * the multicast hardware addresses. We need to figure out which ones | |
792 | * are new and which ones have been removed | |
793 | */ | |
794 | ||
795 | /* Clear out the found flag */ | |
796 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
797 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
798 | ||
799 | /* Mark all of the entries that are found or don't exist */ | |
800 | for (mclist = dev->mc_list; mclist; mclist = mclist->next) { | |
801 | union ib_gid mgid; | |
802 | ||
803 | memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); | |
804 | ||
1da177e4 LT |
805 | mcast = __ipoib_mcast_find(dev, &mgid); |
806 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
807 | struct ipoib_mcast *nmcast; | |
808 | ||
335a64a5 OG |
809 | /* ignore group which is directly joined by userspace */ |
810 | if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && | |
811 | !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { | |
812 | ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid " | |
813 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); | |
814 | continue; | |
815 | } | |
816 | ||
1da177e4 LT |
817 | /* Not found or send-only group, let's add a new entry */ |
818 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid " | |
819 | IPOIB_GID_FMT "\n", IPOIB_GID_ARG(mgid)); | |
820 | ||
821 | nmcast = ipoib_mcast_alloc(dev, 0); | |
822 | if (!nmcast) { | |
823 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
824 | continue; | |
825 | } | |
826 | ||
827 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
828 | ||
829 | nmcast->mcmember.mgid = mgid; | |
830 | ||
831 | if (mcast) { | |
832 | /* Destroy the send only entry */ | |
179e0917 | 833 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
834 | |
835 | rb_replace_node(&mcast->rb_node, | |
836 | &nmcast->rb_node, | |
837 | &priv->multicast_tree); | |
838 | } else | |
839 | __ipoib_mcast_add(dev, nmcast); | |
840 | ||
841 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
842 | } | |
843 | ||
844 | if (mcast) | |
845 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
846 | } | |
847 | ||
848 | /* Remove all of the entries don't exist anymore */ | |
849 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
850 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
851 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
852 | ipoib_dbg_mcast(priv, "deleting multicast group " IPOIB_GID_FMT "\n", | |
853 | IPOIB_GID_ARG(mcast->mcmember.mgid)); | |
854 | ||
855 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
856 | ||
857 | /* Move to the remove list */ | |
179e0917 | 858 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
859 | } |
860 | } | |
78bfe0b5 MT |
861 | |
862 | spin_unlock(&priv->lock); | |
e308a5d8 | 863 | netif_addr_unlock(dev); |
932ff279 | 864 | local_irq_restore(flags); |
1da177e4 LT |
865 | |
866 | /* We have to cancel outside of the spinlock */ | |
867 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
868 | ipoib_mcast_leave(mcast->dev, mcast); | |
869 | ipoib_mcast_free(mcast); | |
870 | } | |
871 | ||
872 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
873 | ipoib_mcast_start_thread(dev); | |
874 | } | |
875 | ||
8ae5a8a2 RD |
876 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
877 | ||
1da177e4 LT |
878 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
879 | { | |
880 | struct ipoib_mcast_iter *iter; | |
881 | ||
882 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
883 | if (!iter) | |
884 | return NULL; | |
885 | ||
886 | iter->dev = dev; | |
1732b0ef | 887 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
888 | |
889 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 890 | kfree(iter); |
1da177e4 LT |
891 | return NULL; |
892 | } | |
893 | ||
894 | return iter; | |
895 | } | |
896 | ||
1da177e4 LT |
897 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
898 | { | |
899 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
900 | struct rb_node *n; | |
901 | struct ipoib_mcast *mcast; | |
902 | int ret = 1; | |
903 | ||
904 | spin_lock_irq(&priv->lock); | |
905 | ||
906 | n = rb_first(&priv->multicast_tree); | |
907 | ||
908 | while (n) { | |
909 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
910 | ||
911 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
912 | sizeof (union ib_gid)) < 0) { | |
913 | iter->mgid = mcast->mcmember.mgid; | |
914 | iter->created = mcast->created; | |
915 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
916 | iter->complete = !!mcast->ah; | |
917 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
918 | ||
919 | ret = 0; | |
920 | ||
921 | break; | |
922 | } | |
923 | ||
924 | n = rb_next(n); | |
925 | } | |
926 | ||
927 | spin_unlock_irq(&priv->lock); | |
928 | ||
929 | return ret; | |
930 | } | |
931 | ||
932 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
933 | union ib_gid *mgid, | |
934 | unsigned long *created, | |
935 | unsigned int *queuelen, | |
936 | unsigned int *complete, | |
937 | unsigned int *send_only) | |
938 | { | |
939 | *mgid = iter->mgid; | |
940 | *created = iter->created; | |
941 | *queuelen = iter->queuelen; | |
942 | *complete = iter->complete; | |
943 | *send_only = iter->send_only; | |
944 | } | |
8ae5a8a2 RD |
945 | |
946 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |