Commit | Line | Data |
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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 | ||
69 | static void ipoib_mcast_free(struct ipoib_mcast *mcast) | |
70 | { | |
71 | struct net_device *dev = mcast->dev; | |
72 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
73 | struct ipoib_neigh *neigh, *tmp; | |
b36f170b | 74 | int tx_dropped = 0; |
1da177e4 | 75 | |
5b095d98 | 76 | ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n", |
fcace2fe | 77 | mcast->mcmember.mgid.raw); |
1da177e4 | 78 | |
943c246e | 79 | spin_lock_irq(&priv->lock); |
1da177e4 LT |
80 | |
81 | list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) { | |
97460df3 EC |
82 | /* |
83 | * It's safe to call ipoib_put_ah() inside priv->lock | |
84 | * here, because we know that mcast->ah will always | |
85 | * hold one more reference, so ipoib_put_ah() will | |
86 | * never do more than decrement the ref count. | |
87 | */ | |
1da177e4 | 88 | if (neigh->ah) |
97460df3 | 89 | ipoib_put_ah(neigh->ah); |
2745b5b7 | 90 | ipoib_neigh_free(dev, neigh); |
1da177e4 LT |
91 | } |
92 | ||
943c246e | 93 | spin_unlock_irq(&priv->lock); |
1da177e4 | 94 | |
1da177e4 LT |
95 | if (mcast->ah) |
96 | ipoib_put_ah(mcast->ah); | |
97 | ||
b36f170b MT |
98 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
99 | ++tx_dropped; | |
8c608a32 | 100 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
101 | } |
102 | ||
943c246e | 103 | netif_tx_lock_bh(dev); |
de903512 | 104 | dev->stats.tx_dropped += tx_dropped; |
943c246e | 105 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
106 | |
107 | kfree(mcast); | |
108 | } | |
109 | ||
110 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
111 | int can_sleep) | |
112 | { | |
113 | struct ipoib_mcast *mcast; | |
114 | ||
de6eb66b | 115 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
116 | if (!mcast) |
117 | return NULL; | |
118 | ||
1da177e4 LT |
119 | mcast->dev = dev; |
120 | mcast->created = jiffies; | |
ce5b65cc | 121 | mcast->backoff = 1; |
1da177e4 LT |
122 | |
123 | INIT_LIST_HEAD(&mcast->list); | |
124 | INIT_LIST_HEAD(&mcast->neigh_list); | |
125 | skb_queue_head_init(&mcast->pkt_queue); | |
126 | ||
1da177e4 LT |
127 | return mcast; |
128 | } | |
129 | ||
37c22a77 | 130 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) |
1da177e4 LT |
131 | { |
132 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
133 | struct rb_node *n = priv->multicast_tree.rb_node; | |
134 | ||
135 | while (n) { | |
136 | struct ipoib_mcast *mcast; | |
137 | int ret; | |
138 | ||
139 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
140 | ||
37c22a77 | 141 | ret = memcmp(mgid, mcast->mcmember.mgid.raw, |
1da177e4 LT |
142 | sizeof (union ib_gid)); |
143 | if (ret < 0) | |
144 | n = n->rb_left; | |
145 | else if (ret > 0) | |
146 | n = n->rb_right; | |
147 | else | |
148 | return mcast; | |
149 | } | |
150 | ||
151 | return NULL; | |
152 | } | |
153 | ||
154 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
155 | { | |
156 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
157 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
158 | ||
159 | while (*n) { | |
160 | struct ipoib_mcast *tmcast; | |
161 | int ret; | |
162 | ||
163 | pn = *n; | |
164 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
165 | ||
166 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
167 | sizeof (union ib_gid)); | |
168 | if (ret < 0) | |
169 | n = &pn->rb_left; | |
170 | else if (ret > 0) | |
171 | n = &pn->rb_right; | |
172 | else | |
173 | return -EEXIST; | |
174 | } | |
175 | ||
176 | rb_link_node(&mcast->rb_node, pn, n); | |
177 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
183 | struct ib_sa_mcmember_rec *mcmember) | |
184 | { | |
185 | struct net_device *dev = mcast->dev; | |
186 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7343b231 | 187 | struct ipoib_ah *ah; |
1da177e4 | 188 | int ret; |
d0de1362 | 189 | int set_qkey = 0; |
1da177e4 LT |
190 | |
191 | mcast->mcmember = *mcmember; | |
192 | ||
193 | /* Set the cached Q_Key before we attach if it's the broadcast group */ | |
194 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
195 | sizeof (union ib_gid))) { | |
e1d50dce JM |
196 | spin_lock_irq(&priv->lock); |
197 | if (!priv->broadcast) { | |
198 | spin_unlock_irq(&priv->lock); | |
199 | return -EAGAIN; | |
200 | } | |
1da177e4 | 201 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); |
e1d50dce | 202 | spin_unlock_irq(&priv->lock); |
1da177e4 | 203 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; |
d0de1362 | 204 | set_qkey = 1; |
1da177e4 LT |
205 | } |
206 | ||
207 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
208 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
5b095d98 | 209 | ipoib_warn(priv, "multicast group %pI6 already attached\n", |
fcace2fe | 210 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
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 | 217 | if (ret < 0) { |
5b095d98 | 218 | ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n", |
fcace2fe | 219 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
220 | |
221 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
222 | return ret; | |
223 | } | |
224 | } | |
225 | ||
226 | { | |
227 | struct ib_ah_attr av = { | |
228 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
229 | .port_num = priv->port, | |
230 | .sl = mcast->mcmember.sl, | |
231 | .ah_flags = IB_AH_GRH, | |
bf6a9e31 | 232 | .static_rate = mcast->mcmember.rate, |
1da177e4 LT |
233 | .grh = { |
234 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
235 | .hop_limit = mcast->mcmember.hop_limit, | |
236 | .sgid_index = 0, | |
237 | .traffic_class = mcast->mcmember.traffic_class | |
238 | } | |
239 | }; | |
1da177e4 LT |
240 | av.grh.dgid = mcast->mcmember.mgid; |
241 | ||
7343b231 | 242 | ah = ipoib_create_ah(dev, priv->pd, &av); |
3874397c MM |
243 | if (IS_ERR(ah)) { |
244 | ipoib_warn(priv, "ib_address_create failed %ld\n", | |
245 | -PTR_ERR(ah)); | |
246 | /* use original error */ | |
247 | return PTR_ERR(ah); | |
1da177e4 | 248 | } else { |
624d01f8 OG |
249 | spin_lock_irq(&priv->lock); |
250 | mcast->ah = ah; | |
251 | spin_unlock_irq(&priv->lock); | |
252 | ||
5b095d98 | 253 | ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n", |
fcace2fe | 254 | mcast->mcmember.mgid.raw, |
1da177e4 LT |
255 | mcast->ah->ah, |
256 | be16_to_cpu(mcast->mcmember.mlid), | |
257 | mcast->mcmember.sl); | |
258 | } | |
259 | } | |
260 | ||
261 | /* actually send any queued packets */ | |
943c246e | 262 | netif_tx_lock_bh(dev); |
1da177e4 LT |
263 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
264 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
69cce1d1 DM |
265 | struct dst_entry *dst = skb_dst(skb); |
266 | struct neighbour *n = NULL; | |
267 | ||
943c246e | 268 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
269 | |
270 | skb->dev = dev; | |
69cce1d1 | 271 | if (dst) |
27217455 | 272 | n = dst_get_neighbour_noref_raw(dst); |
69cce1d1 | 273 | if (!dst || !n) { |
1da177e4 LT |
274 | /* put pseudoheader back on for next time */ |
275 | skb_push(skb, sizeof (struct ipoib_pseudoheader)); | |
276 | } | |
277 | ||
278 | if (dev_queue_xmit(skb)) | |
279 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
943c246e | 280 | netif_tx_lock_bh(dev); |
1da177e4 | 281 | } |
943c246e | 282 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
283 | |
284 | return 0; | |
285 | } | |
286 | ||
faec2f7b | 287 | static int |
1da177e4 | 288 | ipoib_mcast_sendonly_join_complete(int status, |
faec2f7b | 289 | struct ib_sa_multicast *multicast) |
1da177e4 | 290 | { |
faec2f7b | 291 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
292 | struct net_device *dev = mcast->dev; |
293 | ||
faec2f7b SH |
294 | /* We trap for port events ourselves. */ |
295 | if (status == -ENETRESET) | |
296 | return 0; | |
297 | ||
1da177e4 | 298 | if (!status) |
faec2f7b SH |
299 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); |
300 | ||
301 | if (status) { | |
1da177e4 | 302 | if (mcast->logcount++ < 20) |
5b095d98 | 303 | ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for %pI6, status %d\n", |
fcace2fe | 304 | mcast->mcmember.mgid.raw, status); |
1da177e4 LT |
305 | |
306 | /* Flush out any queued packets */ | |
943c246e | 307 | netif_tx_lock_bh(dev); |
b36f170b | 308 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
de903512 | 309 | ++dev->stats.tx_dropped; |
8c608a32 | 310 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b | 311 | } |
943c246e | 312 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
313 | |
314 | /* Clear the busy flag so we try again */ | |
faec2f7b SH |
315 | status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, |
316 | &mcast->flags); | |
1da177e4 | 317 | } |
faec2f7b | 318 | return status; |
1da177e4 LT |
319 | } |
320 | ||
321 | static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast) | |
322 | { | |
323 | struct net_device *dev = mcast->dev; | |
324 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
325 | struct ib_sa_mcmember_rec rec = { | |
326 | #if 0 /* Some SMs don't support send-only yet */ | |
327 | .join_state = 4 | |
328 | #else | |
329 | .join_state = 1 | |
330 | #endif | |
331 | }; | |
332 | int ret = 0; | |
333 | ||
334 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
335 | ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n"); | |
336 | return -ENODEV; | |
337 | } | |
338 | ||
339 | if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { | |
340 | ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n"); | |
341 | return -EBUSY; | |
342 | } | |
343 | ||
344 | rec.mgid = mcast->mcmember.mgid; | |
345 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 346 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 | 347 | |
faec2f7b SH |
348 | mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, |
349 | priv->port, &rec, | |
350 | IB_SA_MCMEMBER_REC_MGID | | |
351 | IB_SA_MCMEMBER_REC_PORT_GID | | |
352 | IB_SA_MCMEMBER_REC_PKEY | | |
353 | IB_SA_MCMEMBER_REC_JOIN_STATE, | |
354 | GFP_ATOMIC, | |
355 | ipoib_mcast_sendonly_join_complete, | |
356 | mcast); | |
357 | if (IS_ERR(mcast->mc)) { | |
358 | ret = PTR_ERR(mcast->mc); | |
359 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
360 | ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n", | |
1da177e4 LT |
361 | ret); |
362 | } else { | |
5b095d98 | 363 | ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting join\n", |
fcace2fe | 364 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
365 | } |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
e8224e4b YE |
370 | void ipoib_mcast_carrier_on_task(struct work_struct *work) |
371 | { | |
372 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
373 | carrier_on_task); | |
5ee95120 | 374 | struct ib_port_attr attr; |
e8224e4b YE |
375 | |
376 | /* | |
377 | * Take rtnl_lock to avoid racing with ipoib_stop() and | |
378 | * turning the carrier back on while a device is being | |
379 | * removed. | |
380 | */ | |
5ee95120 MS |
381 | if (ib_query_port(priv->ca, priv->port, &attr) || |
382 | attr.state != IB_PORT_ACTIVE) { | |
383 | ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); | |
384 | return; | |
385 | } | |
386 | ||
e8224e4b YE |
387 | rtnl_lock(); |
388 | netif_carrier_on(priv->dev); | |
389 | rtnl_unlock(); | |
390 | } | |
391 | ||
faec2f7b SH |
392 | static int ipoib_mcast_join_complete(int status, |
393 | struct ib_sa_multicast *multicast) | |
1da177e4 | 394 | { |
faec2f7b | 395 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
396 | struct net_device *dev = mcast->dev; |
397 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
398 | ||
5b095d98 | 399 | ipoib_dbg_mcast(priv, "join completion for %pI6 (status %d)\n", |
fcace2fe | 400 | mcast->mcmember.mgid.raw, status); |
1da177e4 | 401 | |
faec2f7b SH |
402 | /* We trap for port events ourselves. */ |
403 | if (status == -ENETRESET) | |
404 | return 0; | |
405 | ||
406 | if (!status) | |
407 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); | |
408 | ||
409 | if (!status) { | |
ce5b65cc | 410 | mcast->backoff = 1; |
95ed644f | 411 | mutex_lock(&mcast_mutex); |
1da177e4 | 412 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
c4028958 DH |
413 | queue_delayed_work(ipoib_workqueue, |
414 | &priv->mcast_task, 0); | |
95ed644f | 415 | mutex_unlock(&mcast_mutex); |
55c9adde | 416 | |
e8224e4b YE |
417 | /* |
418 | * Defer carrier on work to ipoib_workqueue to avoid a | |
419 | * deadlock on rtnl_lock here. | |
420 | */ | |
421 | if (mcast == priv->broadcast) | |
422 | queue_work(ipoib_workqueue, &priv->carrier_on_task); | |
55c9adde | 423 | |
faec2f7b | 424 | return 0; |
1da177e4 LT |
425 | } |
426 | ||
faec2f7b | 427 | if (mcast->logcount++ < 20) { |
3c209620 | 428 | if (status == -ETIMEDOUT || status == -EAGAIN) { |
5b095d98 | 429 | ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n", |
fcace2fe | 430 | mcast->mcmember.mgid.raw, status); |
1da177e4 | 431 | } else { |
5b095d98 | 432 | ipoib_warn(priv, "multicast join failed for %pI6, status %d\n", |
fcace2fe | 433 | mcast->mcmember.mgid.raw, status); |
1da177e4 LT |
434 | } |
435 | } | |
436 | ||
437 | mcast->backoff *= 2; | |
438 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
439 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
440 | ||
faec2f7b SH |
441 | /* Clear the busy flag so we try again */ |
442 | status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
9acf6a85 | 443 | |
faec2f7b | 444 | mutex_lock(&mcast_mutex); |
9acf6a85 | 445 | spin_lock_irq(&priv->lock); |
faec2f7b SH |
446 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
447 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, | |
448 | mcast->backoff * HZ); | |
9acf6a85 | 449 | spin_unlock_irq(&priv->lock); |
95ed644f | 450 | mutex_unlock(&mcast_mutex); |
1da177e4 | 451 | |
faec2f7b | 452 | return status; |
1da177e4 LT |
453 | } |
454 | ||
455 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
456 | int create) | |
457 | { | |
458 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
459 | struct ib_sa_mcmember_rec rec = { | |
460 | .join_state = 1 | |
461 | }; | |
462 | ib_sa_comp_mask comp_mask; | |
463 | int ret = 0; | |
464 | ||
5b095d98 | 465 | ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw); |
1da177e4 LT |
466 | |
467 | rec.mgid = mcast->mcmember.mgid; | |
468 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 469 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
470 | |
471 | comp_mask = | |
472 | IB_SA_MCMEMBER_REC_MGID | | |
473 | IB_SA_MCMEMBER_REC_PORT_GID | | |
474 | IB_SA_MCMEMBER_REC_PKEY | | |
475 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
476 | ||
477 | if (create) { | |
478 | comp_mask |= | |
d0df6d6d RD |
479 | IB_SA_MCMEMBER_REC_QKEY | |
480 | IB_SA_MCMEMBER_REC_MTU_SELECTOR | | |
481 | IB_SA_MCMEMBER_REC_MTU | | |
482 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | | |
483 | IB_SA_MCMEMBER_REC_RATE_SELECTOR | | |
484 | IB_SA_MCMEMBER_REC_RATE | | |
485 | IB_SA_MCMEMBER_REC_SL | | |
486 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
487 | IB_SA_MCMEMBER_REC_HOP_LIMIT; | |
1da177e4 LT |
488 | |
489 | rec.qkey = priv->broadcast->mcmember.qkey; | |
d0df6d6d RD |
490 | rec.mtu_selector = IB_SA_EQ; |
491 | rec.mtu = priv->broadcast->mcmember.mtu; | |
492 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
493 | rec.rate_selector = IB_SA_EQ; | |
494 | rec.rate = priv->broadcast->mcmember.rate; | |
1da177e4 LT |
495 | rec.sl = priv->broadcast->mcmember.sl; |
496 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
d0df6d6d | 497 | rec.hop_limit = priv->broadcast->mcmember.hop_limit; |
1da177e4 LT |
498 | } |
499 | ||
faec2f7b SH |
500 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
501 | mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, | |
502 | &rec, comp_mask, GFP_KERNEL, | |
503 | ipoib_mcast_join_complete, mcast); | |
504 | if (IS_ERR(mcast->mc)) { | |
505 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
506 | ret = PTR_ERR(mcast->mc); | |
507 | ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); | |
1da177e4 LT |
508 | |
509 | mcast->backoff *= 2; | |
510 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
511 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
512 | ||
95ed644f | 513 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
514 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
515 | queue_delayed_work(ipoib_workqueue, | |
516 | &priv->mcast_task, | |
ce5b65cc | 517 | mcast->backoff * HZ); |
95ed644f | 518 | mutex_unlock(&mcast_mutex); |
faec2f7b | 519 | } |
1da177e4 LT |
520 | } |
521 | ||
c4028958 | 522 | void ipoib_mcast_join_task(struct work_struct *work) |
1da177e4 | 523 | { |
c4028958 DH |
524 | struct ipoib_dev_priv *priv = |
525 | container_of(work, struct ipoib_dev_priv, mcast_task.work); | |
526 | struct net_device *dev = priv->dev; | |
1da177e4 LT |
527 | |
528 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
529 | return; | |
530 | ||
531 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) | |
24bd1e4e | 532 | ipoib_warn(priv, "ib_query_gid() failed\n"); |
1da177e4 LT |
533 | else |
534 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
535 | ||
536 | { | |
537 | struct ib_port_attr attr; | |
538 | ||
658bcef6 RD |
539 | if (!ib_query_port(priv->ca, priv->port, &attr)) |
540 | priv->local_lid = attr.lid; | |
541 | else | |
faec2f7b | 542 | ipoib_warn(priv, "ib_query_port failed\n"); |
1da177e4 LT |
543 | } |
544 | ||
545 | if (!priv->broadcast) { | |
20b83382 RD |
546 | struct ipoib_mcast *broadcast; |
547 | ||
50df48f5 YE |
548 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) |
549 | return; | |
550 | ||
20b83382 RD |
551 | broadcast = ipoib_mcast_alloc(dev, 1); |
552 | if (!broadcast) { | |
1da177e4 | 553 | ipoib_warn(priv, "failed to allocate broadcast group\n"); |
95ed644f | 554 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
555 | if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) |
556 | queue_delayed_work(ipoib_workqueue, | |
557 | &priv->mcast_task, HZ); | |
95ed644f | 558 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
559 | return; |
560 | } | |
561 | ||
20b83382 RD |
562 | spin_lock_irq(&priv->lock); |
563 | memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, | |
1da177e4 | 564 | sizeof (union ib_gid)); |
20b83382 | 565 | priv->broadcast = broadcast; |
1da177e4 | 566 | |
1da177e4 LT |
567 | __ipoib_mcast_add(dev, priv->broadcast); |
568 | spin_unlock_irq(&priv->lock); | |
569 | } | |
570 | ||
571 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
faec2f7b SH |
572 | if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) |
573 | ipoib_mcast_join(dev, priv->broadcast, 0); | |
1da177e4 LT |
574 | return; |
575 | } | |
576 | ||
577 | while (1) { | |
578 | struct ipoib_mcast *mcast = NULL; | |
579 | ||
580 | spin_lock_irq(&priv->lock); | |
581 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
582 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) | |
583 | && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) | |
584 | && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
585 | /* Found the next unjoined group */ | |
586 | break; | |
587 | } | |
588 | } | |
589 | spin_unlock_irq(&priv->lock); | |
590 | ||
591 | if (&mcast->list == &priv->multicast_list) { | |
592 | /* All done */ | |
593 | break; | |
594 | } | |
595 | ||
596 | ipoib_mcast_join(dev, mcast, 1); | |
597 | return; | |
598 | } | |
599 | ||
bc7b3a36 | 600 | priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); |
839fcaba | 601 | |
c8c2afe3 EC |
602 | if (!ipoib_cm_admin_enabled(dev)) { |
603 | rtnl_lock(); | |
bd360671 | 604 | dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu)); |
c8c2afe3 EC |
605 | rtnl_unlock(); |
606 | } | |
1da177e4 LT |
607 | |
608 | ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n"); | |
609 | ||
610 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); | |
1da177e4 LT |
611 | } |
612 | ||
613 | int ipoib_mcast_start_thread(struct net_device *dev) | |
614 | { | |
615 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
616 | ||
617 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
618 | ||
95ed644f | 619 | mutex_lock(&mcast_mutex); |
1da177e4 | 620 | if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags)) |
c4028958 | 621 | queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0); |
95ed644f | 622 | mutex_unlock(&mcast_mutex); |
1da177e4 LT |
623 | |
624 | return 0; | |
625 | } | |
626 | ||
8d2cae06 | 627 | int ipoib_mcast_stop_thread(struct net_device *dev, int flush) |
1da177e4 LT |
628 | { |
629 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
630 | |
631 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
632 | ||
95ed644f | 633 | mutex_lock(&mcast_mutex); |
1da177e4 LT |
634 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
635 | cancel_delayed_work(&priv->mcast_task); | |
95ed644f | 636 | mutex_unlock(&mcast_mutex); |
1da177e4 | 637 | |
8d2cae06 RD |
638 | if (flush) |
639 | flush_workqueue(ipoib_workqueue); | |
1da177e4 | 640 | |
1da177e4 LT |
641 | return 0; |
642 | } | |
643 | ||
644 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
645 | { | |
646 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
647 | int ret = 0; |
648 | ||
e07832b6 SH |
649 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
650 | ib_sa_free_multicast(mcast->mc); | |
651 | ||
faec2f7b | 652 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { |
5b095d98 | 653 | ipoib_dbg_mcast(priv, "leaving MGID %pI6\n", |
fcace2fe | 654 | mcast->mcmember.mgid.raw); |
1da177e4 | 655 | |
faec2f7b | 656 | /* Remove ourselves from the multicast group */ |
9eae554c RD |
657 | ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, |
658 | be16_to_cpu(mcast->mcmember.mlid)); | |
faec2f7b | 659 | if (ret) |
9eae554c | 660 | ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); |
faec2f7b | 661 | } |
1da177e4 | 662 | |
1da177e4 LT |
663 | return 0; |
664 | } | |
665 | ||
37c22a77 | 666 | void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb) |
1da177e4 LT |
667 | { |
668 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
669 | struct ipoib_mcast *mcast; | |
943c246e | 670 | unsigned long flags; |
1da177e4 | 671 | |
943c246e | 672 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 673 | |
b3e2749b | 674 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || |
20b83382 RD |
675 | !priv->broadcast || |
676 | !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
de903512 | 677 | ++dev->stats.tx_dropped; |
479a0796 MT |
678 | dev_kfree_skb_any(skb); |
679 | goto unlock; | |
680 | } | |
681 | ||
1da177e4 LT |
682 | mcast = __ipoib_mcast_find(dev, mgid); |
683 | if (!mcast) { | |
684 | /* Let's create a new send only group now */ | |
5b095d98 | 685 | ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n", |
fcace2fe | 686 | mgid); |
1da177e4 LT |
687 | |
688 | mcast = ipoib_mcast_alloc(dev, 0); | |
689 | if (!mcast) { | |
690 | ipoib_warn(priv, "unable to allocate memory for " | |
691 | "multicast structure\n"); | |
de903512 | 692 | ++dev->stats.tx_dropped; |
1da177e4 LT |
693 | dev_kfree_skb_any(skb); |
694 | goto out; | |
695 | } | |
696 | ||
697 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); | |
37c22a77 | 698 | memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid)); |
1da177e4 LT |
699 | __ipoib_mcast_add(dev, mcast); |
700 | list_add_tail(&mcast->list, &priv->multicast_list); | |
701 | } | |
702 | ||
703 | if (!mcast->ah) { | |
704 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) | |
705 | skb_queue_tail(&mcast->pkt_queue, skb); | |
b36f170b | 706 | else { |
de903512 | 707 | ++dev->stats.tx_dropped; |
1da177e4 | 708 | dev_kfree_skb_any(skb); |
b36f170b | 709 | } |
1da177e4 | 710 | |
faec2f7b | 711 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
1da177e4 LT |
712 | ipoib_dbg_mcast(priv, "no address vector, " |
713 | "but multicast join already started\n"); | |
714 | else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
715 | ipoib_mcast_sendonly_join(mcast); | |
716 | ||
717 | /* | |
718 | * If lookup completes between here and out:, don't | |
719 | * want to send packet twice. | |
720 | */ | |
721 | mcast = NULL; | |
722 | } | |
723 | ||
724 | out: | |
725 | if (mcast && mcast->ah) { | |
69cce1d1 DM |
726 | struct dst_entry *dst = skb_dst(skb); |
727 | struct neighbour *n = NULL; | |
580da35a ED |
728 | |
729 | rcu_read_lock(); | |
69cce1d1 | 730 | if (dst) |
27217455 | 731 | n = dst_get_neighbour_noref(dst); |
69cce1d1 DM |
732 | if (n && !*to_ipoib_neigh(n)) { |
733 | struct ipoib_neigh *neigh = ipoib_neigh_alloc(n, | |
734 | skb->dev); | |
1da177e4 LT |
735 | |
736 | if (neigh) { | |
737 | kref_get(&mcast->ah->ref); | |
2337f809 | 738 | neigh->ah = mcast->ah; |
1da177e4 LT |
739 | list_add_tail(&neigh->list, &mcast->neigh_list); |
740 | } | |
741 | } | |
580da35a | 742 | rcu_read_unlock(); |
721d67cd | 743 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 744 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); |
721d67cd | 745 | return; |
1da177e4 LT |
746 | } |
747 | ||
479a0796 | 748 | unlock: |
943c246e | 749 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
750 | } |
751 | ||
752 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
753 | { | |
754 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
755 | LIST_HEAD(remove_list); | |
988bd503 | 756 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
757 | unsigned long flags; |
758 | ||
759 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
760 | ||
761 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 762 | |
988bd503 EC |
763 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
764 | list_del(&mcast->list); | |
765 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
766 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
767 | } |
768 | ||
769 | if (priv->broadcast) { | |
3cd96564 | 770 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
988bd503 EC |
771 | list_add_tail(&priv->broadcast->list, &remove_list); |
772 | priv->broadcast = NULL; | |
1da177e4 LT |
773 | } |
774 | ||
775 | spin_unlock_irqrestore(&priv->lock, flags); | |
776 | ||
777 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
778 | ipoib_mcast_leave(dev, mcast); | |
779 | ipoib_mcast_free(mcast); | |
780 | } | |
781 | } | |
782 | ||
3e4aa12f | 783 | static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast) |
5e47596b | 784 | { |
5e47596b JG |
785 | /* reserved QPN, prefix, scope */ |
786 | if (memcmp(addr, broadcast, 6)) | |
787 | return 0; | |
788 | /* signature lower, pkey */ | |
789 | if (memcmp(addr + 7, broadcast + 7, 3)) | |
790 | return 0; | |
791 | return 1; | |
792 | } | |
793 | ||
c4028958 | 794 | void ipoib_mcast_restart_task(struct work_struct *work) |
1da177e4 | 795 | { |
c4028958 DH |
796 | struct ipoib_dev_priv *priv = |
797 | container_of(work, struct ipoib_dev_priv, restart_task); | |
798 | struct net_device *dev = priv->dev; | |
22bedad3 | 799 | struct netdev_hw_addr *ha; |
1da177e4 LT |
800 | struct ipoib_mcast *mcast, *tmcast; |
801 | LIST_HEAD(remove_list); | |
802 | unsigned long flags; | |
335a64a5 | 803 | struct ib_sa_mcmember_rec rec; |
1da177e4 LT |
804 | |
805 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); | |
806 | ||
8d2cae06 | 807 | ipoib_mcast_stop_thread(dev, 0); |
1da177e4 | 808 | |
932ff279 | 809 | local_irq_save(flags); |
e308a5d8 | 810 | netif_addr_lock(dev); |
78bfe0b5 | 811 | spin_lock(&priv->lock); |
1da177e4 LT |
812 | |
813 | /* | |
814 | * Unfortunately, the networking core only gives us a list of all of | |
815 | * the multicast hardware addresses. We need to figure out which ones | |
816 | * are new and which ones have been removed | |
817 | */ | |
818 | ||
819 | /* Clear out the found flag */ | |
820 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
821 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
822 | ||
823 | /* Mark all of the entries that are found or don't exist */ | |
22bedad3 | 824 | netdev_for_each_mc_addr(ha, dev) { |
1da177e4 LT |
825 | union ib_gid mgid; |
826 | ||
22bedad3 | 827 | if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast)) |
5e47596b JG |
828 | continue; |
829 | ||
22bedad3 | 830 | memcpy(mgid.raw, ha->addr + 4, sizeof mgid); |
1da177e4 | 831 | |
1da177e4 LT |
832 | mcast = __ipoib_mcast_find(dev, &mgid); |
833 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
834 | struct ipoib_mcast *nmcast; | |
835 | ||
335a64a5 OG |
836 | /* ignore group which is directly joined by userspace */ |
837 | if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && | |
838 | !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { | |
5b095d98 | 839 | ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n", |
fcace2fe | 840 | mgid.raw); |
335a64a5 OG |
841 | continue; |
842 | } | |
843 | ||
1da177e4 | 844 | /* Not found or send-only group, let's add a new entry */ |
5b095d98 | 845 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n", |
fcace2fe | 846 | mgid.raw); |
1da177e4 LT |
847 | |
848 | nmcast = ipoib_mcast_alloc(dev, 0); | |
849 | if (!nmcast) { | |
850 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
851 | continue; | |
852 | } | |
853 | ||
854 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
855 | ||
856 | nmcast->mcmember.mgid = mgid; | |
857 | ||
858 | if (mcast) { | |
859 | /* Destroy the send only entry */ | |
179e0917 | 860 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
861 | |
862 | rb_replace_node(&mcast->rb_node, | |
863 | &nmcast->rb_node, | |
864 | &priv->multicast_tree); | |
865 | } else | |
866 | __ipoib_mcast_add(dev, nmcast); | |
867 | ||
868 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
869 | } | |
870 | ||
871 | if (mcast) | |
872 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
873 | } | |
874 | ||
875 | /* Remove all of the entries don't exist anymore */ | |
876 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
877 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
878 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
5b095d98 | 879 | ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n", |
fcace2fe | 880 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
881 | |
882 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
883 | ||
884 | /* Move to the remove list */ | |
179e0917 | 885 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
886 | } |
887 | } | |
78bfe0b5 MT |
888 | |
889 | spin_unlock(&priv->lock); | |
e308a5d8 | 890 | netif_addr_unlock(dev); |
932ff279 | 891 | local_irq_restore(flags); |
1da177e4 LT |
892 | |
893 | /* We have to cancel outside of the spinlock */ | |
894 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { | |
895 | ipoib_mcast_leave(mcast->dev, mcast); | |
896 | ipoib_mcast_free(mcast); | |
897 | } | |
898 | ||
899 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
900 | ipoib_mcast_start_thread(dev); | |
901 | } | |
902 | ||
8ae5a8a2 RD |
903 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
904 | ||
1da177e4 LT |
905 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
906 | { | |
907 | struct ipoib_mcast_iter *iter; | |
908 | ||
909 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
910 | if (!iter) | |
911 | return NULL; | |
912 | ||
913 | iter->dev = dev; | |
1732b0ef | 914 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
915 | |
916 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 917 | kfree(iter); |
1da177e4 LT |
918 | return NULL; |
919 | } | |
920 | ||
921 | return iter; | |
922 | } | |
923 | ||
1da177e4 LT |
924 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
925 | { | |
926 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
927 | struct rb_node *n; | |
928 | struct ipoib_mcast *mcast; | |
929 | int ret = 1; | |
930 | ||
931 | spin_lock_irq(&priv->lock); | |
932 | ||
933 | n = rb_first(&priv->multicast_tree); | |
934 | ||
935 | while (n) { | |
936 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
937 | ||
938 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
939 | sizeof (union ib_gid)) < 0) { | |
940 | iter->mgid = mcast->mcmember.mgid; | |
941 | iter->created = mcast->created; | |
942 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
943 | iter->complete = !!mcast->ah; | |
944 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
945 | ||
946 | ret = 0; | |
947 | ||
948 | break; | |
949 | } | |
950 | ||
951 | n = rb_next(n); | |
952 | } | |
953 | ||
954 | spin_unlock_irq(&priv->lock); | |
955 | ||
956 | return ret; | |
957 | } | |
958 | ||
959 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
960 | union ib_gid *mgid, | |
961 | unsigned long *created, | |
962 | unsigned int *queuelen, | |
963 | unsigned int *complete, | |
964 | unsigned int *send_only) | |
965 | { | |
966 | *mgid = iter->mgid; | |
967 | *created = iter->created; | |
968 | *queuelen = iter->queuelen; | |
969 | *complete = iter->complete; | |
970 | *send_only = iter->send_only; | |
971 | } | |
8ae5a8a2 RD |
972 | |
973 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |