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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> | |
fec14d2f | 37 | #include <linux/moduleparam.h> |
1da177e4 LT |
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> | |
5a0e3ad6 | 44 | #include <linux/slab.h> |
1da177e4 | 45 | |
14c85021 ACM |
46 | #include <net/dst.h> |
47 | ||
1da177e4 LT |
48 | #include "ipoib.h" |
49 | ||
50 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG | |
51 | static int mcast_debug_level; | |
52 | ||
53 | module_param(mcast_debug_level, int, 0644); | |
54 | MODULE_PARM_DESC(mcast_debug_level, | |
55 | "Enable multicast debug tracing if > 0"); | |
56 | #endif | |
57 | ||
95ed644f | 58 | static DEFINE_MUTEX(mcast_mutex); |
1da177e4 | 59 | |
1da177e4 LT |
60 | struct 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 | ||
69911416 DL |
69 | /* |
70 | * This should be called with the mcast_mutex held | |
71 | */ | |
72 | static void __ipoib_mcast_schedule_join_thread(struct ipoib_dev_priv *priv, | |
73 | struct ipoib_mcast *mcast, | |
74 | bool delay) | |
75 | { | |
76 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
77 | return; | |
78 | ||
79 | /* | |
80 | * We will be scheduling *something*, so cancel whatever is | |
81 | * currently scheduled first | |
82 | */ | |
83 | cancel_delayed_work(&priv->mcast_task); | |
84 | if (mcast && delay) { | |
85 | /* | |
86 | * We had a failure and want to schedule a retry later | |
87 | */ | |
88 | mcast->backoff *= 2; | |
89 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
90 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
91 | mcast->delay_until = jiffies + (mcast->backoff * HZ); | |
92 | /* | |
93 | * Mark this mcast for its delay, but restart the | |
94 | * task immediately. The join task will make sure to | |
95 | * clear out all entries without delays, and then | |
96 | * schedule itself to run again when the earliest | |
97 | * delay expires | |
98 | */ | |
99 | queue_delayed_work(priv->wq, &priv->mcast_task, 0); | |
100 | } else if (delay) { | |
101 | /* | |
102 | * Special case of retrying after a failure to | |
103 | * allocate the broadcast multicast group, wait | |
104 | * 1 second and try again | |
105 | */ | |
106 | queue_delayed_work(priv->wq, &priv->mcast_task, HZ); | |
107 | } else | |
108 | queue_delayed_work(priv->wq, &priv->mcast_task, 0); | |
109 | } | |
110 | ||
1da177e4 LT |
111 | static void ipoib_mcast_free(struct ipoib_mcast *mcast) |
112 | { | |
113 | struct net_device *dev = mcast->dev; | |
b36f170b | 114 | int tx_dropped = 0; |
1da177e4 | 115 | |
5b095d98 | 116 | ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n", |
fcace2fe | 117 | mcast->mcmember.mgid.raw); |
1da177e4 | 118 | |
b63b70d8 SP |
119 | /* remove all neigh connected to this mcast */ |
120 | ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw); | |
1da177e4 | 121 | |
1da177e4 LT |
122 | if (mcast->ah) |
123 | ipoib_put_ah(mcast->ah); | |
124 | ||
b36f170b MT |
125 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
126 | ++tx_dropped; | |
8c608a32 | 127 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
128 | } |
129 | ||
943c246e | 130 | netif_tx_lock_bh(dev); |
de903512 | 131 | dev->stats.tx_dropped += tx_dropped; |
943c246e | 132 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
133 | |
134 | kfree(mcast); | |
135 | } | |
136 | ||
137 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
138 | int can_sleep) | |
139 | { | |
140 | struct ipoib_mcast *mcast; | |
141 | ||
de6eb66b | 142 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
143 | if (!mcast) |
144 | return NULL; | |
145 | ||
1da177e4 LT |
146 | mcast->dev = dev; |
147 | mcast->created = jiffies; | |
69911416 | 148 | mcast->delay_until = jiffies; |
ce5b65cc | 149 | mcast->backoff = 1; |
1da177e4 LT |
150 | |
151 | INIT_LIST_HEAD(&mcast->list); | |
152 | INIT_LIST_HEAD(&mcast->neigh_list); | |
153 | skb_queue_head_init(&mcast->pkt_queue); | |
154 | ||
1da177e4 LT |
155 | return mcast; |
156 | } | |
157 | ||
37c22a77 | 158 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) |
1da177e4 LT |
159 | { |
160 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
161 | struct rb_node *n = priv->multicast_tree.rb_node; | |
162 | ||
163 | while (n) { | |
164 | struct ipoib_mcast *mcast; | |
165 | int ret; | |
166 | ||
167 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
168 | ||
37c22a77 | 169 | ret = memcmp(mgid, mcast->mcmember.mgid.raw, |
1da177e4 LT |
170 | sizeof (union ib_gid)); |
171 | if (ret < 0) | |
172 | n = n->rb_left; | |
173 | else if (ret > 0) | |
174 | n = n->rb_right; | |
175 | else | |
176 | return mcast; | |
177 | } | |
178 | ||
179 | return NULL; | |
180 | } | |
181 | ||
182 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
183 | { | |
184 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
185 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
186 | ||
187 | while (*n) { | |
188 | struct ipoib_mcast *tmcast; | |
189 | int ret; | |
190 | ||
191 | pn = *n; | |
192 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
193 | ||
194 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
195 | sizeof (union ib_gid)); | |
196 | if (ret < 0) | |
197 | n = &pn->rb_left; | |
198 | else if (ret > 0) | |
199 | n = &pn->rb_right; | |
200 | else | |
201 | return -EEXIST; | |
202 | } | |
203 | ||
204 | rb_link_node(&mcast->rb_node, pn, n); | |
205 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
211 | struct ib_sa_mcmember_rec *mcmember) | |
212 | { | |
213 | struct net_device *dev = mcast->dev; | |
214 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7343b231 | 215 | struct ipoib_ah *ah; |
1da177e4 | 216 | int ret; |
d0de1362 | 217 | int set_qkey = 0; |
1da177e4 LT |
218 | |
219 | mcast->mcmember = *mcmember; | |
220 | ||
bea1e22d PM |
221 | /* Set the multicast MTU and cached Q_Key before we attach if it's |
222 | * the broadcast group. | |
223 | */ | |
1da177e4 LT |
224 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, |
225 | sizeof (union ib_gid))) { | |
e1d50dce JM |
226 | spin_lock_irq(&priv->lock); |
227 | if (!priv->broadcast) { | |
228 | spin_unlock_irq(&priv->lock); | |
229 | return -EAGAIN; | |
230 | } | |
bea1e22d | 231 | priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); |
1da177e4 | 232 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); |
e1d50dce | 233 | spin_unlock_irq(&priv->lock); |
1da177e4 | 234 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; |
d0de1362 | 235 | set_qkey = 1; |
1da177e4 LT |
236 | } |
237 | ||
238 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
239 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
5b095d98 | 240 | ipoib_warn(priv, "multicast group %pI6 already attached\n", |
fcace2fe | 241 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
242 | |
243 | return 0; | |
244 | } | |
245 | ||
246 | ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
d0de1362 | 247 | &mcast->mcmember.mgid, set_qkey); |
1da177e4 | 248 | if (ret < 0) { |
5b095d98 | 249 | ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n", |
fcace2fe | 250 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
251 | |
252 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
253 | return ret; | |
254 | } | |
255 | } | |
256 | ||
257 | { | |
258 | struct ib_ah_attr av = { | |
259 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
260 | .port_num = priv->port, | |
261 | .sl = mcast->mcmember.sl, | |
262 | .ah_flags = IB_AH_GRH, | |
bf6a9e31 | 263 | .static_rate = mcast->mcmember.rate, |
1da177e4 LT |
264 | .grh = { |
265 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
266 | .hop_limit = mcast->mcmember.hop_limit, | |
267 | .sgid_index = 0, | |
268 | .traffic_class = mcast->mcmember.traffic_class | |
269 | } | |
270 | }; | |
1da177e4 LT |
271 | av.grh.dgid = mcast->mcmember.mgid; |
272 | ||
7343b231 | 273 | ah = ipoib_create_ah(dev, priv->pd, &av); |
3874397c MM |
274 | if (IS_ERR(ah)) { |
275 | ipoib_warn(priv, "ib_address_create failed %ld\n", | |
276 | -PTR_ERR(ah)); | |
277 | /* use original error */ | |
278 | return PTR_ERR(ah); | |
1da177e4 | 279 | } else { |
624d01f8 OG |
280 | spin_lock_irq(&priv->lock); |
281 | mcast->ah = ah; | |
282 | spin_unlock_irq(&priv->lock); | |
283 | ||
5b095d98 | 284 | ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n", |
fcace2fe | 285 | mcast->mcmember.mgid.raw, |
1da177e4 LT |
286 | mcast->ah->ah, |
287 | be16_to_cpu(mcast->mcmember.mlid), | |
288 | mcast->mcmember.sl); | |
289 | } | |
290 | } | |
291 | ||
292 | /* actually send any queued packets */ | |
943c246e | 293 | netif_tx_lock_bh(dev); |
1da177e4 LT |
294 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
295 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
69cce1d1 | 296 | |
943c246e | 297 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
298 | |
299 | skb->dev = dev; | |
1da177e4 LT |
300 | if (dev_queue_xmit(skb)) |
301 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
936d7de3 | 302 | |
943c246e | 303 | netif_tx_lock_bh(dev); |
1da177e4 | 304 | } |
943c246e | 305 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
306 | |
307 | return 0; | |
308 | } | |
309 | ||
e8224e4b YE |
310 | void ipoib_mcast_carrier_on_task(struct work_struct *work) |
311 | { | |
312 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
313 | carrier_on_task); | |
5ee95120 | 314 | struct ib_port_attr attr; |
e8224e4b | 315 | |
5ee95120 MS |
316 | if (ib_query_port(priv->ca, priv->port, &attr) || |
317 | attr.state != IB_PORT_ACTIVE) { | |
318 | ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); | |
319 | return; | |
320 | } | |
321 | ||
894021a7 DL |
322 | /* |
323 | * Take rtnl_lock to avoid racing with ipoib_stop() and | |
324 | * turning the carrier back on while a device is being | |
325 | * removed. However, ipoib_stop() will attempt to flush | |
326 | * the workqueue while holding the rtnl lock, so loop | |
327 | * on trylock until either we get the lock or we see | |
328 | * FLAG_OPER_UP go away as that signals that we are bailing | |
329 | * and can safely ignore the carrier on work. | |
330 | */ | |
331 | while (!rtnl_trylock()) { | |
332 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) | |
333 | return; | |
334 | else | |
335 | msleep(20); | |
336 | } | |
c84ca6d2 DL |
337 | if (!ipoib_cm_admin_enabled(priv->dev)) |
338 | dev_set_mtu(priv->dev, min(priv->mcast_mtu, priv->admin_mtu)); | |
e8224e4b YE |
339 | netif_carrier_on(priv->dev); |
340 | rtnl_unlock(); | |
341 | } | |
342 | ||
faec2f7b SH |
343 | static int ipoib_mcast_join_complete(int status, |
344 | struct ib_sa_multicast *multicast) | |
1da177e4 | 345 | { |
faec2f7b | 346 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
347 | struct net_device *dev = mcast->dev; |
348 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
349 | ||
d2fe937c DL |
350 | ipoib_dbg_mcast(priv, "%sjoin completion for %pI6 (status %d)\n", |
351 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? | |
352 | "sendonly " : "", | |
fcace2fe | 353 | mcast->mcmember.mgid.raw, status); |
1da177e4 | 354 | |
69911416 DL |
355 | /* |
356 | * We have to take the mutex to force mcast_join to | |
357 | * return from ib_sa_multicast_join and set mcast->mc to a | |
358 | * valid value. Otherwise we were racing with ourselves in | |
359 | * that we might fail here, but get a valid return from | |
360 | * ib_sa_multicast_join after we had cleared mcast->mc here, | |
361 | * resulting in mis-matched joins and leaves and a deadlock | |
362 | */ | |
363 | mutex_lock(&mcast_mutex); | |
364 | ||
faec2f7b | 365 | /* We trap for port events ourselves. */ |
e7a623d2 RD |
366 | if (status == -ENETRESET) { |
367 | status = 0; | |
a9c8ba58 | 368 | goto out; |
e7a623d2 | 369 | } |
faec2f7b SH |
370 | |
371 | if (!status) | |
372 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); | |
373 | ||
374 | if (!status) { | |
ce5b65cc | 375 | mcast->backoff = 1; |
69911416 | 376 | mcast->delay_until = jiffies; |
55c9adde | 377 | |
e8224e4b | 378 | /* |
0b39578b | 379 | * Defer carrier on work to priv->wq to avoid a |
d2fe937c DL |
380 | * deadlock on rtnl_lock here. Requeue our multicast |
381 | * work too, which will end up happening right after | |
382 | * our carrier on task work and will allow us to | |
383 | * send out all of the non-broadcast joins | |
e8224e4b | 384 | */ |
d2fe937c | 385 | if (mcast == priv->broadcast) { |
0b39578b | 386 | queue_work(priv->wq, &priv->carrier_on_task); |
d2fe937c DL |
387 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); |
388 | } | |
69911416 DL |
389 | } else { |
390 | if (mcast->logcount++ < 20) { | |
391 | if (status == -ETIMEDOUT || status == -EAGAIN) { | |
d2fe937c DL |
392 | ipoib_dbg_mcast(priv, "%smulticast join failed for %pI6, status %d\n", |
393 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", | |
69911416 DL |
394 | mcast->mcmember.mgid.raw, status); |
395 | } else { | |
d2fe937c DL |
396 | ipoib_warn(priv, "%smulticast join failed for %pI6, status %d\n", |
397 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", | |
69911416 DL |
398 | mcast->mcmember.mgid.raw, status); |
399 | } | |
e7a623d2 | 400 | } |
e7a623d2 | 401 | |
d2fe937c DL |
402 | if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && |
403 | mcast->backoff >= 2) { | |
404 | /* | |
405 | * We only retry sendonly joins once before we drop | |
406 | * the packet and quit trying to deal with the | |
407 | * group. However, we leave the group in the | |
408 | * mcast list as an unjoined group. If we want to | |
409 | * try joining again, we simply queue up a packet | |
410 | * and restart the join thread. The empty queue | |
411 | * is why the join thread ignores this group. | |
412 | */ | |
413 | mcast->backoff = 1; | |
414 | netif_tx_lock_bh(dev); | |
415 | while (!skb_queue_empty(&mcast->pkt_queue)) { | |
416 | ++dev->stats.tx_dropped; | |
417 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); | |
418 | } | |
419 | netif_tx_unlock_bh(dev); | |
420 | } else | |
421 | /* Requeue this join task with a backoff delay */ | |
422 | __ipoib_mcast_schedule_join_thread(priv, mcast, 1); | |
69911416 | 423 | } |
e7a623d2 | 424 | out: |
69911416 DL |
425 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
426 | if (status) | |
427 | mcast->mc = NULL; | |
e7a623d2 | 428 | complete(&mcast->done); |
69911416 | 429 | mutex_unlock(&mcast_mutex); |
faec2f7b | 430 | return status; |
1da177e4 LT |
431 | } |
432 | ||
433 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
434 | int create) | |
435 | { | |
436 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
437 | struct ib_sa_mcmember_rec rec = { | |
438 | .join_state = 1 | |
439 | }; | |
440 | ib_sa_comp_mask comp_mask; | |
441 | int ret = 0; | |
442 | ||
5b095d98 | 443 | ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw); |
1da177e4 LT |
444 | |
445 | rec.mgid = mcast->mcmember.mgid; | |
446 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 447 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
448 | |
449 | comp_mask = | |
450 | IB_SA_MCMEMBER_REC_MGID | | |
451 | IB_SA_MCMEMBER_REC_PORT_GID | | |
452 | IB_SA_MCMEMBER_REC_PKEY | | |
453 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
454 | ||
455 | if (create) { | |
456 | comp_mask |= | |
d0df6d6d RD |
457 | IB_SA_MCMEMBER_REC_QKEY | |
458 | IB_SA_MCMEMBER_REC_MTU_SELECTOR | | |
459 | IB_SA_MCMEMBER_REC_MTU | | |
460 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | | |
461 | IB_SA_MCMEMBER_REC_RATE_SELECTOR | | |
462 | IB_SA_MCMEMBER_REC_RATE | | |
463 | IB_SA_MCMEMBER_REC_SL | | |
464 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
465 | IB_SA_MCMEMBER_REC_HOP_LIMIT; | |
1da177e4 LT |
466 | |
467 | rec.qkey = priv->broadcast->mcmember.qkey; | |
d0df6d6d RD |
468 | rec.mtu_selector = IB_SA_EQ; |
469 | rec.mtu = priv->broadcast->mcmember.mtu; | |
470 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
471 | rec.rate_selector = IB_SA_EQ; | |
472 | rec.rate = priv->broadcast->mcmember.rate; | |
1da177e4 LT |
473 | rec.sl = priv->broadcast->mcmember.sl; |
474 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
d0df6d6d | 475 | rec.hop_limit = priv->broadcast->mcmember.hop_limit; |
1da177e4 LT |
476 | } |
477 | ||
69911416 | 478 | mutex_lock(&mcast_mutex); |
faec2f7b SH |
479 | mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, |
480 | &rec, comp_mask, GFP_KERNEL, | |
481 | ipoib_mcast_join_complete, mcast); | |
482 | if (IS_ERR(mcast->mc)) { | |
483 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
484 | ret = PTR_ERR(mcast->mc); | |
485 | ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); | |
69911416 DL |
486 | __ipoib_mcast_schedule_join_thread(priv, mcast, 1); |
487 | complete(&mcast->done); | |
faec2f7b | 488 | } |
69911416 | 489 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
490 | } |
491 | ||
c4028958 | 492 | void ipoib_mcast_join_task(struct work_struct *work) |
1da177e4 | 493 | { |
c4028958 DH |
494 | struct ipoib_dev_priv *priv = |
495 | container_of(work, struct ipoib_dev_priv, mcast_task.work); | |
496 | struct net_device *dev = priv->dev; | |
94232d9c | 497 | struct ib_port_attr port_attr; |
69911416 DL |
498 | unsigned long delay_until = 0; |
499 | struct ipoib_mcast *mcast = NULL; | |
500 | int create = 1; | |
1da177e4 LT |
501 | |
502 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
503 | return; | |
504 | ||
94232d9c ES |
505 | if (ib_query_port(priv->ca, priv->port, &port_attr) || |
506 | port_attr.state != IB_PORT_ACTIVE) { | |
507 | ipoib_dbg(priv, "port state is not ACTIVE (state = %d) suspending join task\n", | |
508 | port_attr.state); | |
509 | return; | |
510 | } | |
68f9d83c | 511 | priv->local_lid = port_attr.lid; |
94232d9c | 512 | |
1da177e4 | 513 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) |
24bd1e4e | 514 | ipoib_warn(priv, "ib_query_gid() failed\n"); |
1da177e4 LT |
515 | else |
516 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
517 | ||
69911416 DL |
518 | /* |
519 | * We have to hold the mutex to keep from racing with the join | |
520 | * completion threads on setting flags on mcasts, and we have | |
521 | * to hold the priv->lock because dev_flush will remove entries | |
522 | * out from underneath us, so at a minimum we need the lock | |
523 | * through the time that we do the for_each loop of the mcast | |
524 | * list or else dev_flush can make us oops. | |
525 | */ | |
526 | mutex_lock(&mcast_mutex); | |
527 | spin_lock_irq(&priv->lock); | |
528 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) | |
529 | goto out; | |
530 | ||
1da177e4 | 531 | if (!priv->broadcast) { |
20b83382 RD |
532 | struct ipoib_mcast *broadcast; |
533 | ||
69911416 | 534 | broadcast = ipoib_mcast_alloc(dev, 0); |
20b83382 | 535 | if (!broadcast) { |
1da177e4 | 536 | ipoib_warn(priv, "failed to allocate broadcast group\n"); |
69911416 DL |
537 | /* |
538 | * Restart us after a 1 second delay to retry | |
539 | * creating our broadcast group and attaching to | |
540 | * it. Until this succeeds, this ipoib dev is | |
541 | * completely stalled (multicast wise). | |
542 | */ | |
543 | __ipoib_mcast_schedule_join_thread(priv, NULL, 1); | |
544 | goto out; | |
1da177e4 LT |
545 | } |
546 | ||
20b83382 | 547 | memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, |
1da177e4 | 548 | sizeof (union ib_gid)); |
20b83382 | 549 | priv->broadcast = broadcast; |
1da177e4 | 550 | |
1da177e4 | 551 | __ipoib_mcast_add(dev, priv->broadcast); |
1da177e4 LT |
552 | } |
553 | ||
554 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
69911416 DL |
555 | if (IS_ERR_OR_NULL(priv->broadcast->mc) && |
556 | !test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) { | |
557 | mcast = priv->broadcast; | |
558 | create = 0; | |
559 | if (mcast->backoff > 1 && | |
560 | time_before(jiffies, mcast->delay_until)) { | |
561 | delay_until = mcast->delay_until; | |
562 | mcast = NULL; | |
563 | } | |
564 | } | |
565 | goto out; | |
1da177e4 LT |
566 | } |
567 | ||
69911416 DL |
568 | /* |
569 | * We'll never get here until the broadcast group is both allocated | |
570 | * and attached | |
571 | */ | |
572 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
573 | if (IS_ERR_OR_NULL(mcast->mc) && | |
574 | !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) && | |
d2fe937c DL |
575 | (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) || |
576 | !skb_queue_empty(&mcast->pkt_queue))) { | |
69911416 | 577 | if (mcast->backoff == 1 || |
d2fe937c | 578 | time_after_eq(jiffies, mcast->delay_until)) { |
1da177e4 | 579 | /* Found the next unjoined group */ |
d2fe937c DL |
580 | init_completion(&mcast->done); |
581 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
582 | if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
583 | create = 0; | |
584 | else | |
585 | create = 1; | |
586 | spin_unlock_irq(&priv->lock); | |
587 | mutex_unlock(&mcast_mutex); | |
588 | ipoib_mcast_join(dev, mcast, create); | |
589 | mutex_lock(&mcast_mutex); | |
590 | spin_lock_irq(&priv->lock); | |
591 | } else if (!delay_until || | |
69911416 DL |
592 | time_before(mcast->delay_until, delay_until)) |
593 | delay_until = mcast->delay_until; | |
1da177e4 | 594 | } |
1da177e4 LT |
595 | } |
596 | ||
d2fe937c DL |
597 | mcast = NULL; |
598 | ipoib_dbg_mcast(priv, "successfully started all multicast joins\n"); | |
1da177e4 | 599 | |
69911416 | 600 | out: |
d2fe937c DL |
601 | if (delay_until) { |
602 | cancel_delayed_work(&priv->mcast_task); | |
603 | queue_delayed_work(priv->wq, &priv->mcast_task, | |
604 | delay_until - jiffies); | |
605 | } | |
69911416 DL |
606 | if (mcast) { |
607 | init_completion(&mcast->done); | |
608 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
609 | } | |
610 | spin_unlock_irq(&priv->lock); | |
611 | mutex_unlock(&mcast_mutex); | |
d2fe937c DL |
612 | if (mcast) |
613 | ipoib_mcast_join(dev, mcast, create); | |
1da177e4 LT |
614 | } |
615 | ||
616 | int ipoib_mcast_start_thread(struct net_device *dev) | |
617 | { | |
618 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
619 | ||
620 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
621 | ||
95ed644f | 622 | mutex_lock(&mcast_mutex); |
69911416 DL |
623 | set_bit(IPOIB_MCAST_RUN, &priv->flags); |
624 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
95ed644f | 625 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
626 | |
627 | return 0; | |
628 | } | |
629 | ||
efc82eee | 630 | int ipoib_mcast_stop_thread(struct net_device *dev) |
1da177e4 LT |
631 | { |
632 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
633 | |
634 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
635 | ||
95ed644f | 636 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
637 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
638 | cancel_delayed_work(&priv->mcast_task); | |
95ed644f | 639 | mutex_unlock(&mcast_mutex); |
1da177e4 | 640 | |
efc82eee | 641 | flush_workqueue(priv->wq); |
1da177e4 | 642 | |
1da177e4 LT |
643 | return 0; |
644 | } | |
645 | ||
646 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
647 | { | |
648 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
649 | int ret = 0; |
650 | ||
e07832b6 | 651 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
69911416 DL |
652 | ipoib_warn(priv, "ipoib_mcast_leave on an in-flight join\n"); |
653 | ||
654 | if (!IS_ERR_OR_NULL(mcast->mc)) | |
e07832b6 SH |
655 | ib_sa_free_multicast(mcast->mc); |
656 | ||
faec2f7b | 657 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { |
5b095d98 | 658 | ipoib_dbg_mcast(priv, "leaving MGID %pI6\n", |
fcace2fe | 659 | mcast->mcmember.mgid.raw); |
1da177e4 | 660 | |
faec2f7b | 661 | /* Remove ourselves from the multicast group */ |
9eae554c RD |
662 | ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, |
663 | be16_to_cpu(mcast->mcmember.mlid)); | |
faec2f7b | 664 | if (ret) |
9eae554c | 665 | ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); |
69911416 DL |
666 | } else if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) |
667 | ipoib_dbg(priv, "leaving with no mcmember but not a " | |
668 | "SENDONLY join\n"); | |
1da177e4 | 669 | |
1da177e4 LT |
670 | return 0; |
671 | } | |
672 | ||
b63b70d8 | 673 | void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb) |
1da177e4 LT |
674 | { |
675 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
676 | struct ipoib_mcast *mcast; | |
943c246e | 677 | unsigned long flags; |
b63b70d8 | 678 | void *mgid = daddr + 4; |
700db99d | 679 | |
943c246e | 680 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 681 | |
b3e2749b | 682 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || |
20b83382 RD |
683 | !priv->broadcast || |
684 | !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
de903512 | 685 | ++dev->stats.tx_dropped; |
479a0796 MT |
686 | dev_kfree_skb_any(skb); |
687 | goto unlock; | |
688 | } | |
689 | ||
1da177e4 | 690 | mcast = __ipoib_mcast_find(dev, mgid); |
d2fe937c | 691 | if (!mcast || !mcast->ah) { |
1da177e4 | 692 | if (!mcast) { |
d2fe937c DL |
693 | /* Let's create a new send only group now */ |
694 | ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n", | |
695 | mgid); | |
696 | ||
697 | mcast = ipoib_mcast_alloc(dev, 0); | |
698 | if (!mcast) { | |
699 | ipoib_warn(priv, "unable to allocate memory " | |
700 | "for multicast structure\n"); | |
701 | ++dev->stats.tx_dropped; | |
702 | dev_kfree_skb_any(skb); | |
703 | goto unlock; | |
704 | } | |
1da177e4 | 705 | |
d2fe937c DL |
706 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); |
707 | memcpy(mcast->mcmember.mgid.raw, mgid, | |
708 | sizeof (union ib_gid)); | |
709 | __ipoib_mcast_add(dev, mcast); | |
710 | list_add_tail(&mcast->list, &priv->multicast_list); | |
711 | } | |
1da177e4 LT |
712 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) |
713 | skb_queue_tail(&mcast->pkt_queue, skb); | |
b36f170b | 714 | else { |
de903512 | 715 | ++dev->stats.tx_dropped; |
1da177e4 | 716 | dev_kfree_skb_any(skb); |
b36f170b | 717 | } |
d2fe937c DL |
718 | if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { |
719 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
720 | } | |
721 | } else { | |
b63b70d8 SP |
722 | struct ipoib_neigh *neigh; |
723 | ||
724 | spin_unlock_irqrestore(&priv->lock, flags); | |
725 | neigh = ipoib_neigh_get(dev, daddr); | |
726 | spin_lock_irqsave(&priv->lock, flags); | |
727 | if (!neigh) { | |
b63b70d8 | 728 | neigh = ipoib_neigh_alloc(daddr, dev); |
b63b70d8 SP |
729 | if (neigh) { |
730 | kref_get(&mcast->ah->ref); | |
731 | neigh->ah = mcast->ah; | |
732 | list_add_tail(&neigh->list, &mcast->neigh_list); | |
1da177e4 LT |
733 | } |
734 | } | |
721d67cd | 735 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 736 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); |
b63b70d8 SP |
737 | if (neigh) |
738 | ipoib_neigh_put(neigh); | |
721d67cd | 739 | return; |
1da177e4 LT |
740 | } |
741 | ||
479a0796 | 742 | unlock: |
943c246e | 743 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
744 | } |
745 | ||
746 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
747 | { | |
748 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
749 | LIST_HEAD(remove_list); | |
988bd503 | 750 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
751 | unsigned long flags; |
752 | ||
753 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
754 | ||
755 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 756 | |
988bd503 EC |
757 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
758 | list_del(&mcast->list); | |
759 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
760 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
761 | } |
762 | ||
763 | if (priv->broadcast) { | |
3cd96564 | 764 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
988bd503 EC |
765 | list_add_tail(&priv->broadcast->list, &remove_list); |
766 | priv->broadcast = NULL; | |
1da177e4 LT |
767 | } |
768 | ||
769 | spin_unlock_irqrestore(&priv->lock, flags); | |
770 | ||
69911416 DL |
771 | /* |
772 | * make sure the in-flight joins have finished before we attempt | |
773 | * to leave | |
774 | */ | |
a9c8ba58 | 775 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) |
69911416 | 776 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
a9c8ba58 ES |
777 | wait_for_completion(&mcast->done); |
778 | ||
1da177e4 LT |
779 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { |
780 | ipoib_mcast_leave(dev, mcast); | |
781 | ipoib_mcast_free(mcast); | |
782 | } | |
783 | } | |
784 | ||
3e4aa12f | 785 | static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast) |
5e47596b | 786 | { |
5e47596b JG |
787 | /* reserved QPN, prefix, scope */ |
788 | if (memcmp(addr, broadcast, 6)) | |
789 | return 0; | |
790 | /* signature lower, pkey */ | |
791 | if (memcmp(addr + 7, broadcast + 7, 3)) | |
792 | return 0; | |
793 | return 1; | |
794 | } | |
795 | ||
c4028958 | 796 | void ipoib_mcast_restart_task(struct work_struct *work) |
1da177e4 | 797 | { |
c4028958 DH |
798 | struct ipoib_dev_priv *priv = |
799 | container_of(work, struct ipoib_dev_priv, restart_task); | |
800 | struct net_device *dev = priv->dev; | |
22bedad3 | 801 | struct netdev_hw_addr *ha; |
1da177e4 LT |
802 | struct ipoib_mcast *mcast, *tmcast; |
803 | LIST_HEAD(remove_list); | |
804 | unsigned long flags; | |
335a64a5 | 805 | struct ib_sa_mcmember_rec rec; |
1da177e4 | 806 | |
69911416 DL |
807 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
808 | /* | |
809 | * shortcut...on shutdown flush is called next, just | |
810 | * let it do all the work | |
811 | */ | |
812 | return; | |
1da177e4 | 813 | |
69911416 | 814 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); |
4e0ab200 | 815 | |
932ff279 | 816 | local_irq_save(flags); |
e308a5d8 | 817 | netif_addr_lock(dev); |
78bfe0b5 | 818 | spin_lock(&priv->lock); |
1da177e4 LT |
819 | |
820 | /* | |
821 | * Unfortunately, the networking core only gives us a list of all of | |
822 | * the multicast hardware addresses. We need to figure out which ones | |
823 | * are new and which ones have been removed | |
824 | */ | |
825 | ||
826 | /* Clear out the found flag */ | |
827 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
828 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
829 | ||
830 | /* Mark all of the entries that are found or don't exist */ | |
22bedad3 | 831 | netdev_for_each_mc_addr(ha, dev) { |
1da177e4 LT |
832 | union ib_gid mgid; |
833 | ||
22bedad3 | 834 | if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast)) |
5e47596b JG |
835 | continue; |
836 | ||
22bedad3 | 837 | memcpy(mgid.raw, ha->addr + 4, sizeof mgid); |
1da177e4 | 838 | |
1da177e4 LT |
839 | mcast = __ipoib_mcast_find(dev, &mgid); |
840 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
841 | struct ipoib_mcast *nmcast; | |
842 | ||
335a64a5 OG |
843 | /* ignore group which is directly joined by userspace */ |
844 | if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && | |
845 | !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { | |
5b095d98 | 846 | ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n", |
fcace2fe | 847 | mgid.raw); |
335a64a5 OG |
848 | continue; |
849 | } | |
850 | ||
1da177e4 | 851 | /* Not found or send-only group, let's add a new entry */ |
5b095d98 | 852 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n", |
fcace2fe | 853 | mgid.raw); |
1da177e4 LT |
854 | |
855 | nmcast = ipoib_mcast_alloc(dev, 0); | |
856 | if (!nmcast) { | |
857 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
858 | continue; | |
859 | } | |
860 | ||
861 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
862 | ||
863 | nmcast->mcmember.mgid = mgid; | |
864 | ||
865 | if (mcast) { | |
866 | /* Destroy the send only entry */ | |
179e0917 | 867 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
868 | |
869 | rb_replace_node(&mcast->rb_node, | |
870 | &nmcast->rb_node, | |
871 | &priv->multicast_tree); | |
872 | } else | |
873 | __ipoib_mcast_add(dev, nmcast); | |
874 | ||
875 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
876 | } | |
877 | ||
878 | if (mcast) | |
879 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
880 | } | |
881 | ||
882 | /* Remove all of the entries don't exist anymore */ | |
883 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
884 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
885 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
5b095d98 | 886 | ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n", |
fcace2fe | 887 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
888 | |
889 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
890 | ||
891 | /* Move to the remove list */ | |
179e0917 | 892 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
893 | } |
894 | } | |
78bfe0b5 MT |
895 | |
896 | spin_unlock(&priv->lock); | |
e308a5d8 | 897 | netif_addr_unlock(dev); |
932ff279 | 898 | local_irq_restore(flags); |
1da177e4 | 899 | |
69911416 DL |
900 | /* |
901 | * make sure the in-flight joins have finished before we attempt | |
902 | * to leave | |
903 | */ | |
904 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) | |
905 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) | |
906 | wait_for_completion(&mcast->done); | |
907 | ||
1da177e4 LT |
908 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { |
909 | ipoib_mcast_leave(mcast->dev, mcast); | |
910 | ipoib_mcast_free(mcast); | |
911 | } | |
962121b4 | 912 | |
69911416 DL |
913 | /* |
914 | * Double check that we are still up | |
915 | */ | |
916 | if (test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
917 | spin_lock_irqsave(&priv->lock, flags); | |
918 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
919 | spin_unlock_irqrestore(&priv->lock, flags); | |
920 | } | |
1da177e4 LT |
921 | } |
922 | ||
8ae5a8a2 RD |
923 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
924 | ||
1da177e4 LT |
925 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
926 | { | |
927 | struct ipoib_mcast_iter *iter; | |
928 | ||
929 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
930 | if (!iter) | |
931 | return NULL; | |
932 | ||
933 | iter->dev = dev; | |
1732b0ef | 934 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
935 | |
936 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 937 | kfree(iter); |
1da177e4 LT |
938 | return NULL; |
939 | } | |
940 | ||
941 | return iter; | |
942 | } | |
943 | ||
1da177e4 LT |
944 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
945 | { | |
946 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
947 | struct rb_node *n; | |
948 | struct ipoib_mcast *mcast; | |
949 | int ret = 1; | |
950 | ||
951 | spin_lock_irq(&priv->lock); | |
952 | ||
953 | n = rb_first(&priv->multicast_tree); | |
954 | ||
955 | while (n) { | |
956 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
957 | ||
958 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
959 | sizeof (union ib_gid)) < 0) { | |
960 | iter->mgid = mcast->mcmember.mgid; | |
961 | iter->created = mcast->created; | |
962 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
963 | iter->complete = !!mcast->ah; | |
964 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
965 | ||
966 | ret = 0; | |
967 | ||
968 | break; | |
969 | } | |
970 | ||
971 | n = rb_next(n); | |
972 | } | |
973 | ||
974 | spin_unlock_irq(&priv->lock); | |
975 | ||
976 | return ret; | |
977 | } | |
978 | ||
979 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
980 | union ib_gid *mgid, | |
981 | unsigned long *created, | |
982 | unsigned int *queuelen, | |
983 | unsigned int *complete, | |
984 | unsigned int *send_only) | |
985 | { | |
986 | *mgid = iter->mgid; | |
987 | *created = iter->created; | |
988 | *queuelen = iter->queuelen; | |
989 | *complete = iter->complete; | |
990 | *send_only = iter->send_only; | |
991 | } | |
8ae5a8a2 RD |
992 | |
993 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |