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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 | ||
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 | ||
69911416 | 67 | /* |
1c0453d6 | 68 | * This should be called with the priv->lock held |
69911416 DL |
69 | */ |
70 | static void __ipoib_mcast_schedule_join_thread(struct ipoib_dev_priv *priv, | |
71 | struct ipoib_mcast *mcast, | |
72 | bool delay) | |
73 | { | |
74 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
75 | return; | |
76 | ||
77 | /* | |
78 | * We will be scheduling *something*, so cancel whatever is | |
79 | * currently scheduled first | |
80 | */ | |
81 | cancel_delayed_work(&priv->mcast_task); | |
82 | if (mcast && delay) { | |
83 | /* | |
84 | * We had a failure and want to schedule a retry later | |
85 | */ | |
86 | mcast->backoff *= 2; | |
87 | if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS) | |
88 | mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS; | |
89 | mcast->delay_until = jiffies + (mcast->backoff * HZ); | |
90 | /* | |
91 | * Mark this mcast for its delay, but restart the | |
92 | * task immediately. The join task will make sure to | |
93 | * clear out all entries without delays, and then | |
94 | * schedule itself to run again when the earliest | |
95 | * delay expires | |
96 | */ | |
97 | queue_delayed_work(priv->wq, &priv->mcast_task, 0); | |
98 | } else if (delay) { | |
99 | /* | |
100 | * Special case of retrying after a failure to | |
101 | * allocate the broadcast multicast group, wait | |
102 | * 1 second and try again | |
103 | */ | |
104 | queue_delayed_work(priv->wq, &priv->mcast_task, HZ); | |
105 | } else | |
106 | queue_delayed_work(priv->wq, &priv->mcast_task, 0); | |
107 | } | |
108 | ||
1da177e4 LT |
109 | static void ipoib_mcast_free(struct ipoib_mcast *mcast) |
110 | { | |
111 | struct net_device *dev = mcast->dev; | |
b36f170b | 112 | int tx_dropped = 0; |
1da177e4 | 113 | |
5b095d98 | 114 | ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n", |
fcace2fe | 115 | mcast->mcmember.mgid.raw); |
1da177e4 | 116 | |
b63b70d8 SP |
117 | /* remove all neigh connected to this mcast */ |
118 | ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw); | |
1da177e4 | 119 | |
1da177e4 LT |
120 | if (mcast->ah) |
121 | ipoib_put_ah(mcast->ah); | |
122 | ||
b36f170b MT |
123 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
124 | ++tx_dropped; | |
8c608a32 | 125 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); |
b36f170b MT |
126 | } |
127 | ||
943c246e | 128 | netif_tx_lock_bh(dev); |
de903512 | 129 | dev->stats.tx_dropped += tx_dropped; |
943c246e | 130 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
131 | |
132 | kfree(mcast); | |
133 | } | |
134 | ||
135 | static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev, | |
136 | int can_sleep) | |
137 | { | |
138 | struct ipoib_mcast *mcast; | |
139 | ||
de6eb66b | 140 | mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC); |
1da177e4 LT |
141 | if (!mcast) |
142 | return NULL; | |
143 | ||
1da177e4 LT |
144 | mcast->dev = dev; |
145 | mcast->created = jiffies; | |
69911416 | 146 | mcast->delay_until = jiffies; |
ce5b65cc | 147 | mcast->backoff = 1; |
1da177e4 LT |
148 | |
149 | INIT_LIST_HEAD(&mcast->list); | |
150 | INIT_LIST_HEAD(&mcast->neigh_list); | |
151 | skb_queue_head_init(&mcast->pkt_queue); | |
152 | ||
1da177e4 LT |
153 | return mcast; |
154 | } | |
155 | ||
37c22a77 | 156 | static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid) |
1da177e4 LT |
157 | { |
158 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
159 | struct rb_node *n = priv->multicast_tree.rb_node; | |
160 | ||
161 | while (n) { | |
162 | struct ipoib_mcast *mcast; | |
163 | int ret; | |
164 | ||
165 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
166 | ||
37c22a77 | 167 | ret = memcmp(mgid, mcast->mcmember.mgid.raw, |
1da177e4 LT |
168 | sizeof (union ib_gid)); |
169 | if (ret < 0) | |
170 | n = n->rb_left; | |
171 | else if (ret > 0) | |
172 | n = n->rb_right; | |
173 | else | |
174 | return mcast; | |
175 | } | |
176 | ||
177 | return NULL; | |
178 | } | |
179 | ||
180 | static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast) | |
181 | { | |
182 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
183 | struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL; | |
184 | ||
185 | while (*n) { | |
186 | struct ipoib_mcast *tmcast; | |
187 | int ret; | |
188 | ||
189 | pn = *n; | |
190 | tmcast = rb_entry(pn, struct ipoib_mcast, rb_node); | |
191 | ||
192 | ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw, | |
193 | sizeof (union ib_gid)); | |
194 | if (ret < 0) | |
195 | n = &pn->rb_left; | |
196 | else if (ret > 0) | |
197 | n = &pn->rb_right; | |
198 | else | |
199 | return -EEXIST; | |
200 | } | |
201 | ||
202 | rb_link_node(&mcast->rb_node, pn, n); | |
203 | rb_insert_color(&mcast->rb_node, &priv->multicast_tree); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast, | |
209 | struct ib_sa_mcmember_rec *mcmember) | |
210 | { | |
211 | struct net_device *dev = mcast->dev; | |
212 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
7343b231 | 213 | struct ipoib_ah *ah; |
1da177e4 | 214 | int ret; |
d0de1362 | 215 | int set_qkey = 0; |
1da177e4 LT |
216 | |
217 | mcast->mcmember = *mcmember; | |
218 | ||
bea1e22d PM |
219 | /* Set the multicast MTU and cached Q_Key before we attach if it's |
220 | * the broadcast group. | |
221 | */ | |
1da177e4 LT |
222 | if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4, |
223 | sizeof (union ib_gid))) { | |
e1d50dce JM |
224 | spin_lock_irq(&priv->lock); |
225 | if (!priv->broadcast) { | |
226 | spin_unlock_irq(&priv->lock); | |
227 | return -EAGAIN; | |
228 | } | |
bea1e22d | 229 | priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu)); |
1da177e4 | 230 | priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey); |
e1d50dce | 231 | spin_unlock_irq(&priv->lock); |
1da177e4 | 232 | priv->tx_wr.wr.ud.remote_qkey = priv->qkey; |
d0de1362 | 233 | set_qkey = 1; |
1da177e4 LT |
234 | } |
235 | ||
236 | if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
237 | if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { | |
5b095d98 | 238 | ipoib_warn(priv, "multicast group %pI6 already attached\n", |
fcace2fe | 239 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
240 | |
241 | return 0; | |
242 | } | |
243 | ||
244 | ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid), | |
d0de1362 | 245 | &mcast->mcmember.mgid, set_qkey); |
1da177e4 | 246 | if (ret < 0) { |
5b095d98 | 247 | ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n", |
fcace2fe | 248 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
249 | |
250 | clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags); | |
251 | return ret; | |
252 | } | |
253 | } | |
254 | ||
255 | { | |
256 | struct ib_ah_attr av = { | |
257 | .dlid = be16_to_cpu(mcast->mcmember.mlid), | |
258 | .port_num = priv->port, | |
259 | .sl = mcast->mcmember.sl, | |
260 | .ah_flags = IB_AH_GRH, | |
bf6a9e31 | 261 | .static_rate = mcast->mcmember.rate, |
1da177e4 LT |
262 | .grh = { |
263 | .flow_label = be32_to_cpu(mcast->mcmember.flow_label), | |
264 | .hop_limit = mcast->mcmember.hop_limit, | |
265 | .sgid_index = 0, | |
266 | .traffic_class = mcast->mcmember.traffic_class | |
267 | } | |
268 | }; | |
1da177e4 LT |
269 | av.grh.dgid = mcast->mcmember.mgid; |
270 | ||
7343b231 | 271 | ah = ipoib_create_ah(dev, priv->pd, &av); |
3874397c MM |
272 | if (IS_ERR(ah)) { |
273 | ipoib_warn(priv, "ib_address_create failed %ld\n", | |
274 | -PTR_ERR(ah)); | |
275 | /* use original error */ | |
276 | return PTR_ERR(ah); | |
1da177e4 | 277 | } else { |
624d01f8 OG |
278 | spin_lock_irq(&priv->lock); |
279 | mcast->ah = ah; | |
280 | spin_unlock_irq(&priv->lock); | |
281 | ||
5b095d98 | 282 | ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n", |
fcace2fe | 283 | mcast->mcmember.mgid.raw, |
1da177e4 LT |
284 | mcast->ah->ah, |
285 | be16_to_cpu(mcast->mcmember.mlid), | |
286 | mcast->mcmember.sl); | |
287 | } | |
288 | } | |
289 | ||
290 | /* actually send any queued packets */ | |
943c246e | 291 | netif_tx_lock_bh(dev); |
1da177e4 LT |
292 | while (!skb_queue_empty(&mcast->pkt_queue)) { |
293 | struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue); | |
69cce1d1 | 294 | |
943c246e | 295 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
296 | |
297 | skb->dev = dev; | |
1da177e4 LT |
298 | if (dev_queue_xmit(skb)) |
299 | ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n"); | |
936d7de3 | 300 | |
943c246e | 301 | netif_tx_lock_bh(dev); |
1da177e4 | 302 | } |
943c246e | 303 | netif_tx_unlock_bh(dev); |
1da177e4 LT |
304 | |
305 | return 0; | |
306 | } | |
307 | ||
e8224e4b YE |
308 | void ipoib_mcast_carrier_on_task(struct work_struct *work) |
309 | { | |
310 | struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv, | |
311 | carrier_on_task); | |
5ee95120 | 312 | struct ib_port_attr attr; |
e8224e4b | 313 | |
5ee95120 MS |
314 | if (ib_query_port(priv->ca, priv->port, &attr) || |
315 | attr.state != IB_PORT_ACTIVE) { | |
316 | ipoib_dbg(priv, "Keeping carrier off until IB port is active\n"); | |
317 | return; | |
318 | } | |
319 | ||
894021a7 DL |
320 | /* |
321 | * Take rtnl_lock to avoid racing with ipoib_stop() and | |
322 | * turning the carrier back on while a device is being | |
323 | * removed. However, ipoib_stop() will attempt to flush | |
324 | * the workqueue while holding the rtnl lock, so loop | |
325 | * on trylock until either we get the lock or we see | |
326 | * FLAG_OPER_UP go away as that signals that we are bailing | |
327 | * and can safely ignore the carrier on work. | |
328 | */ | |
329 | while (!rtnl_trylock()) { | |
330 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) | |
331 | return; | |
332 | else | |
333 | msleep(20); | |
334 | } | |
c84ca6d2 DL |
335 | if (!ipoib_cm_admin_enabled(priv->dev)) |
336 | dev_set_mtu(priv->dev, min(priv->mcast_mtu, priv->admin_mtu)); | |
e8224e4b YE |
337 | netif_carrier_on(priv->dev); |
338 | rtnl_unlock(); | |
339 | } | |
340 | ||
faec2f7b SH |
341 | static int ipoib_mcast_join_complete(int status, |
342 | struct ib_sa_multicast *multicast) | |
1da177e4 | 343 | { |
faec2f7b | 344 | struct ipoib_mcast *mcast = multicast->context; |
1da177e4 LT |
345 | struct net_device *dev = mcast->dev; |
346 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
347 | ||
d2fe937c DL |
348 | ipoib_dbg_mcast(priv, "%sjoin completion for %pI6 (status %d)\n", |
349 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? | |
350 | "sendonly " : "", | |
fcace2fe | 351 | mcast->mcmember.mgid.raw, status); |
1da177e4 | 352 | |
faec2f7b | 353 | /* We trap for port events ourselves. */ |
e7a623d2 RD |
354 | if (status == -ENETRESET) { |
355 | status = 0; | |
a9c8ba58 | 356 | goto out; |
e7a623d2 | 357 | } |
faec2f7b SH |
358 | |
359 | if (!status) | |
360 | status = ipoib_mcast_join_finish(mcast, &multicast->rec); | |
361 | ||
362 | if (!status) { | |
ce5b65cc | 363 | mcast->backoff = 1; |
69911416 | 364 | mcast->delay_until = jiffies; |
55c9adde | 365 | |
e8224e4b | 366 | /* |
0b39578b | 367 | * Defer carrier on work to priv->wq to avoid a |
d2fe937c DL |
368 | * deadlock on rtnl_lock here. Requeue our multicast |
369 | * work too, which will end up happening right after | |
370 | * our carrier on task work and will allow us to | |
371 | * send out all of the non-broadcast joins | |
e8224e4b | 372 | */ |
d2fe937c | 373 | if (mcast == priv->broadcast) { |
1c0453d6 | 374 | spin_lock_irq(&priv->lock); |
0b39578b | 375 | queue_work(priv->wq, &priv->carrier_on_task); |
d2fe937c | 376 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); |
1c0453d6 | 377 | goto out_locked; |
d2fe937c | 378 | } |
69911416 DL |
379 | } else { |
380 | if (mcast->logcount++ < 20) { | |
381 | if (status == -ETIMEDOUT || status == -EAGAIN) { | |
d2fe937c DL |
382 | ipoib_dbg_mcast(priv, "%smulticast join failed for %pI6, status %d\n", |
383 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", | |
69911416 DL |
384 | mcast->mcmember.mgid.raw, status); |
385 | } else { | |
d2fe937c DL |
386 | ipoib_warn(priv, "%smulticast join failed for %pI6, status %d\n", |
387 | test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", | |
69911416 DL |
388 | mcast->mcmember.mgid.raw, status); |
389 | } | |
e7a623d2 | 390 | } |
e7a623d2 | 391 | |
d2fe937c DL |
392 | if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && |
393 | mcast->backoff >= 2) { | |
394 | /* | |
395 | * We only retry sendonly joins once before we drop | |
396 | * the packet and quit trying to deal with the | |
397 | * group. However, we leave the group in the | |
398 | * mcast list as an unjoined group. If we want to | |
399 | * try joining again, we simply queue up a packet | |
400 | * and restart the join thread. The empty queue | |
401 | * is why the join thread ignores this group. | |
402 | */ | |
403 | mcast->backoff = 1; | |
404 | netif_tx_lock_bh(dev); | |
405 | while (!skb_queue_empty(&mcast->pkt_queue)) { | |
406 | ++dev->stats.tx_dropped; | |
407 | dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue)); | |
408 | } | |
409 | netif_tx_unlock_bh(dev); | |
1c0453d6 DL |
410 | } else { |
411 | spin_lock_irq(&priv->lock); | |
d2fe937c DL |
412 | /* Requeue this join task with a backoff delay */ |
413 | __ipoib_mcast_schedule_join_thread(priv, mcast, 1); | |
1c0453d6 DL |
414 | goto out_locked; |
415 | } | |
69911416 | 416 | } |
e7a623d2 | 417 | out: |
1c0453d6 DL |
418 | spin_lock_irq(&priv->lock); |
419 | out_locked: | |
420 | /* | |
421 | * Make sure to set mcast->mc before we clear the busy flag to avoid | |
422 | * racing with code that checks for BUSY before checking mcast->mc | |
423 | */ | |
69911416 DL |
424 | if (status) |
425 | mcast->mc = NULL; | |
1c0453d6 DL |
426 | else |
427 | mcast->mc = multicast; | |
428 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
429 | spin_unlock_irq(&priv->lock); | |
e7a623d2 | 430 | complete(&mcast->done); |
1c0453d6 | 431 | |
faec2f7b | 432 | return status; |
1da177e4 LT |
433 | } |
434 | ||
435 | static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast, | |
436 | int create) | |
437 | { | |
438 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1c0453d6 | 439 | struct ib_sa_multicast *multicast; |
1da177e4 LT |
440 | struct ib_sa_mcmember_rec rec = { |
441 | .join_state = 1 | |
442 | }; | |
443 | ib_sa_comp_mask comp_mask; | |
444 | int ret = 0; | |
445 | ||
5b095d98 | 446 | ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw); |
1da177e4 LT |
447 | |
448 | rec.mgid = mcast->mcmember.mgid; | |
449 | rec.port_gid = priv->local_gid; | |
97f52eb4 | 450 | rec.pkey = cpu_to_be16(priv->pkey); |
1da177e4 LT |
451 | |
452 | comp_mask = | |
453 | IB_SA_MCMEMBER_REC_MGID | | |
454 | IB_SA_MCMEMBER_REC_PORT_GID | | |
455 | IB_SA_MCMEMBER_REC_PKEY | | |
456 | IB_SA_MCMEMBER_REC_JOIN_STATE; | |
457 | ||
458 | if (create) { | |
459 | comp_mask |= | |
d0df6d6d RD |
460 | IB_SA_MCMEMBER_REC_QKEY | |
461 | IB_SA_MCMEMBER_REC_MTU_SELECTOR | | |
462 | IB_SA_MCMEMBER_REC_MTU | | |
463 | IB_SA_MCMEMBER_REC_TRAFFIC_CLASS | | |
464 | IB_SA_MCMEMBER_REC_RATE_SELECTOR | | |
465 | IB_SA_MCMEMBER_REC_RATE | | |
466 | IB_SA_MCMEMBER_REC_SL | | |
467 | IB_SA_MCMEMBER_REC_FLOW_LABEL | | |
468 | IB_SA_MCMEMBER_REC_HOP_LIMIT; | |
1da177e4 LT |
469 | |
470 | rec.qkey = priv->broadcast->mcmember.qkey; | |
d0df6d6d RD |
471 | rec.mtu_selector = IB_SA_EQ; |
472 | rec.mtu = priv->broadcast->mcmember.mtu; | |
473 | rec.traffic_class = priv->broadcast->mcmember.traffic_class; | |
474 | rec.rate_selector = IB_SA_EQ; | |
475 | rec.rate = priv->broadcast->mcmember.rate; | |
1da177e4 LT |
476 | rec.sl = priv->broadcast->mcmember.sl; |
477 | rec.flow_label = priv->broadcast->mcmember.flow_label; | |
d0df6d6d | 478 | rec.hop_limit = priv->broadcast->mcmember.hop_limit; |
1da177e4 LT |
479 | } |
480 | ||
1c0453d6 | 481 | multicast = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port, |
faec2f7b SH |
482 | &rec, comp_mask, GFP_KERNEL, |
483 | ipoib_mcast_join_complete, mcast); | |
1c0453d6 DL |
484 | if (IS_ERR(multicast)) { |
485 | ret = PTR_ERR(multicast); | |
faec2f7b | 486 | ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret); |
1c0453d6 DL |
487 | spin_lock_irq(&priv->lock); |
488 | /* Requeue this join task with a backoff delay */ | |
69911416 | 489 | __ipoib_mcast_schedule_join_thread(priv, mcast, 1); |
1c0453d6 DL |
490 | clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); |
491 | spin_unlock_irq(&priv->lock); | |
69911416 | 492 | complete(&mcast->done); |
faec2f7b | 493 | } |
1da177e4 LT |
494 | } |
495 | ||
c4028958 | 496 | void ipoib_mcast_join_task(struct work_struct *work) |
1da177e4 | 497 | { |
c4028958 DH |
498 | struct ipoib_dev_priv *priv = |
499 | container_of(work, struct ipoib_dev_priv, mcast_task.work); | |
500 | struct net_device *dev = priv->dev; | |
94232d9c | 501 | struct ib_port_attr port_attr; |
69911416 DL |
502 | unsigned long delay_until = 0; |
503 | struct ipoib_mcast *mcast = NULL; | |
504 | int create = 1; | |
1da177e4 LT |
505 | |
506 | if (!test_bit(IPOIB_MCAST_RUN, &priv->flags)) | |
507 | return; | |
508 | ||
94232d9c ES |
509 | if (ib_query_port(priv->ca, priv->port, &port_attr) || |
510 | port_attr.state != IB_PORT_ACTIVE) { | |
511 | ipoib_dbg(priv, "port state is not ACTIVE (state = %d) suspending join task\n", | |
512 | port_attr.state); | |
513 | return; | |
514 | } | |
68f9d83c | 515 | priv->local_lid = port_attr.lid; |
94232d9c | 516 | |
1da177e4 | 517 | if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid)) |
24bd1e4e | 518 | ipoib_warn(priv, "ib_query_gid() failed\n"); |
1da177e4 LT |
519 | else |
520 | memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid)); | |
521 | ||
69911416 DL |
522 | spin_lock_irq(&priv->lock); |
523 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) | |
524 | goto out; | |
525 | ||
1da177e4 | 526 | if (!priv->broadcast) { |
20b83382 RD |
527 | struct ipoib_mcast *broadcast; |
528 | ||
69911416 | 529 | broadcast = ipoib_mcast_alloc(dev, 0); |
20b83382 | 530 | if (!broadcast) { |
1da177e4 | 531 | ipoib_warn(priv, "failed to allocate broadcast group\n"); |
69911416 DL |
532 | /* |
533 | * Restart us after a 1 second delay to retry | |
534 | * creating our broadcast group and attaching to | |
535 | * it. Until this succeeds, this ipoib dev is | |
536 | * completely stalled (multicast wise). | |
537 | */ | |
538 | __ipoib_mcast_schedule_join_thread(priv, NULL, 1); | |
539 | goto out; | |
1da177e4 LT |
540 | } |
541 | ||
20b83382 | 542 | memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4, |
1da177e4 | 543 | sizeof (union ib_gid)); |
20b83382 | 544 | priv->broadcast = broadcast; |
1da177e4 | 545 | |
1da177e4 | 546 | __ipoib_mcast_add(dev, priv->broadcast); |
1da177e4 LT |
547 | } |
548 | ||
549 | if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
69911416 DL |
550 | if (IS_ERR_OR_NULL(priv->broadcast->mc) && |
551 | !test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags)) { | |
552 | mcast = priv->broadcast; | |
553 | create = 0; | |
554 | if (mcast->backoff > 1 && | |
555 | time_before(jiffies, mcast->delay_until)) { | |
556 | delay_until = mcast->delay_until; | |
557 | mcast = NULL; | |
558 | } | |
559 | } | |
560 | goto out; | |
1da177e4 LT |
561 | } |
562 | ||
69911416 DL |
563 | /* |
564 | * We'll never get here until the broadcast group is both allocated | |
565 | * and attached | |
566 | */ | |
567 | list_for_each_entry(mcast, &priv->multicast_list, list) { | |
568 | if (IS_ERR_OR_NULL(mcast->mc) && | |
569 | !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags) && | |
d2fe937c DL |
570 | (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) || |
571 | !skb_queue_empty(&mcast->pkt_queue))) { | |
69911416 | 572 | if (mcast->backoff == 1 || |
d2fe937c | 573 | time_after_eq(jiffies, mcast->delay_until)) { |
1da177e4 | 574 | /* Found the next unjoined group */ |
d2fe937c DL |
575 | init_completion(&mcast->done); |
576 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
577 | if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) | |
578 | create = 0; | |
579 | else | |
580 | create = 1; | |
581 | spin_unlock_irq(&priv->lock); | |
d2fe937c | 582 | ipoib_mcast_join(dev, mcast, create); |
d2fe937c DL |
583 | spin_lock_irq(&priv->lock); |
584 | } else if (!delay_until || | |
69911416 DL |
585 | time_before(mcast->delay_until, delay_until)) |
586 | delay_until = mcast->delay_until; | |
1da177e4 | 587 | } |
1da177e4 LT |
588 | } |
589 | ||
d2fe937c DL |
590 | mcast = NULL; |
591 | ipoib_dbg_mcast(priv, "successfully started all multicast joins\n"); | |
1da177e4 | 592 | |
69911416 | 593 | out: |
d2fe937c DL |
594 | if (delay_until) { |
595 | cancel_delayed_work(&priv->mcast_task); | |
596 | queue_delayed_work(priv->wq, &priv->mcast_task, | |
597 | delay_until - jiffies); | |
598 | } | |
69911416 DL |
599 | if (mcast) { |
600 | init_completion(&mcast->done); | |
601 | set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags); | |
602 | } | |
603 | spin_unlock_irq(&priv->lock); | |
d2fe937c DL |
604 | if (mcast) |
605 | ipoib_mcast_join(dev, mcast, create); | |
1da177e4 LT |
606 | } |
607 | ||
608 | int ipoib_mcast_start_thread(struct net_device *dev) | |
609 | { | |
610 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1c0453d6 | 611 | unsigned long flags; |
1da177e4 LT |
612 | |
613 | ipoib_dbg_mcast(priv, "starting multicast thread\n"); | |
614 | ||
1c0453d6 | 615 | spin_lock_irqsave(&priv->lock, flags); |
69911416 DL |
616 | set_bit(IPOIB_MCAST_RUN, &priv->flags); |
617 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
1c0453d6 | 618 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
619 | |
620 | return 0; | |
621 | } | |
622 | ||
efc82eee | 623 | int ipoib_mcast_stop_thread(struct net_device *dev) |
1da177e4 LT |
624 | { |
625 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1c0453d6 | 626 | unsigned long flags; |
1da177e4 LT |
627 | |
628 | ipoib_dbg_mcast(priv, "stopping multicast thread\n"); | |
629 | ||
1c0453d6 | 630 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 LT |
631 | clear_bit(IPOIB_MCAST_RUN, &priv->flags); |
632 | cancel_delayed_work(&priv->mcast_task); | |
1c0453d6 | 633 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 634 | |
efc82eee | 635 | flush_workqueue(priv->wq); |
1da177e4 | 636 | |
1da177e4 LT |
637 | return 0; |
638 | } | |
639 | ||
640 | static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast) | |
641 | { | |
642 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
1da177e4 LT |
643 | int ret = 0; |
644 | ||
e07832b6 | 645 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
69911416 DL |
646 | ipoib_warn(priv, "ipoib_mcast_leave on an in-flight join\n"); |
647 | ||
648 | if (!IS_ERR_OR_NULL(mcast->mc)) | |
e07832b6 SH |
649 | ib_sa_free_multicast(mcast->mc); |
650 | ||
faec2f7b | 651 | if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) { |
5b095d98 | 652 | ipoib_dbg_mcast(priv, "leaving MGID %pI6\n", |
fcace2fe | 653 | mcast->mcmember.mgid.raw); |
1da177e4 | 654 | |
faec2f7b | 655 | /* Remove ourselves from the multicast group */ |
9eae554c RD |
656 | ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid, |
657 | be16_to_cpu(mcast->mcmember.mlid)); | |
faec2f7b | 658 | if (ret) |
9eae554c | 659 | ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret); |
69911416 DL |
660 | } else if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) |
661 | ipoib_dbg(priv, "leaving with no mcmember but not a " | |
662 | "SENDONLY join\n"); | |
1da177e4 | 663 | |
1da177e4 LT |
664 | return 0; |
665 | } | |
666 | ||
b63b70d8 | 667 | void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb) |
1da177e4 LT |
668 | { |
669 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
670 | struct ipoib_mcast *mcast; | |
943c246e | 671 | unsigned long flags; |
b63b70d8 | 672 | void *mgid = daddr + 4; |
700db99d | 673 | |
943c246e | 674 | spin_lock_irqsave(&priv->lock, flags); |
1da177e4 | 675 | |
b3e2749b | 676 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) || |
20b83382 RD |
677 | !priv->broadcast || |
678 | !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) { | |
de903512 | 679 | ++dev->stats.tx_dropped; |
479a0796 MT |
680 | dev_kfree_skb_any(skb); |
681 | goto unlock; | |
682 | } | |
683 | ||
1da177e4 | 684 | mcast = __ipoib_mcast_find(dev, mgid); |
d2fe937c | 685 | if (!mcast || !mcast->ah) { |
1da177e4 | 686 | if (!mcast) { |
d2fe937c DL |
687 | /* Let's create a new send only group now */ |
688 | ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n", | |
689 | mgid); | |
690 | ||
691 | mcast = ipoib_mcast_alloc(dev, 0); | |
692 | if (!mcast) { | |
693 | ipoib_warn(priv, "unable to allocate memory " | |
694 | "for multicast structure\n"); | |
695 | ++dev->stats.tx_dropped; | |
696 | dev_kfree_skb_any(skb); | |
697 | goto unlock; | |
698 | } | |
1da177e4 | 699 | |
d2fe937c DL |
700 | set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags); |
701 | memcpy(mcast->mcmember.mgid.raw, mgid, | |
702 | sizeof (union ib_gid)); | |
703 | __ipoib_mcast_add(dev, mcast); | |
704 | list_add_tail(&mcast->list, &priv->multicast_list); | |
705 | } | |
1da177e4 LT |
706 | if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE) |
707 | skb_queue_tail(&mcast->pkt_queue, skb); | |
b36f170b | 708 | else { |
de903512 | 709 | ++dev->stats.tx_dropped; |
1da177e4 | 710 | dev_kfree_skb_any(skb); |
b36f170b | 711 | } |
d2fe937c DL |
712 | if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) { |
713 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
714 | } | |
715 | } else { | |
b63b70d8 SP |
716 | struct ipoib_neigh *neigh; |
717 | ||
718 | spin_unlock_irqrestore(&priv->lock, flags); | |
719 | neigh = ipoib_neigh_get(dev, daddr); | |
720 | spin_lock_irqsave(&priv->lock, flags); | |
721 | if (!neigh) { | |
b63b70d8 | 722 | neigh = ipoib_neigh_alloc(daddr, dev); |
b63b70d8 SP |
723 | if (neigh) { |
724 | kref_get(&mcast->ah->ref); | |
725 | neigh->ah = mcast->ah; | |
726 | list_add_tail(&neigh->list, &mcast->neigh_list); | |
1da177e4 LT |
727 | } |
728 | } | |
721d67cd | 729 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 | 730 | ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN); |
b63b70d8 SP |
731 | if (neigh) |
732 | ipoib_neigh_put(neigh); | |
721d67cd | 733 | return; |
1da177e4 LT |
734 | } |
735 | ||
479a0796 | 736 | unlock: |
943c246e | 737 | spin_unlock_irqrestore(&priv->lock, flags); |
1da177e4 LT |
738 | } |
739 | ||
740 | void ipoib_mcast_dev_flush(struct net_device *dev) | |
741 | { | |
742 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
743 | LIST_HEAD(remove_list); | |
988bd503 | 744 | struct ipoib_mcast *mcast, *tmcast; |
1da177e4 LT |
745 | unsigned long flags; |
746 | ||
747 | ipoib_dbg_mcast(priv, "flushing multicast list\n"); | |
748 | ||
749 | spin_lock_irqsave(&priv->lock, flags); | |
1da177e4 | 750 | |
988bd503 EC |
751 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { |
752 | list_del(&mcast->list); | |
753 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
754 | list_add_tail(&mcast->list, &remove_list); | |
1da177e4 LT |
755 | } |
756 | ||
757 | if (priv->broadcast) { | |
3cd96564 | 758 | rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree); |
988bd503 EC |
759 | list_add_tail(&priv->broadcast->list, &remove_list); |
760 | priv->broadcast = NULL; | |
1da177e4 LT |
761 | } |
762 | ||
763 | spin_unlock_irqrestore(&priv->lock, flags); | |
764 | ||
69911416 DL |
765 | /* |
766 | * make sure the in-flight joins have finished before we attempt | |
767 | * to leave | |
768 | */ | |
a9c8ba58 | 769 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) |
69911416 | 770 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) |
a9c8ba58 ES |
771 | wait_for_completion(&mcast->done); |
772 | ||
1da177e4 LT |
773 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { |
774 | ipoib_mcast_leave(dev, mcast); | |
775 | ipoib_mcast_free(mcast); | |
776 | } | |
777 | } | |
778 | ||
3e4aa12f | 779 | static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast) |
5e47596b | 780 | { |
5e47596b JG |
781 | /* reserved QPN, prefix, scope */ |
782 | if (memcmp(addr, broadcast, 6)) | |
783 | return 0; | |
784 | /* signature lower, pkey */ | |
785 | if (memcmp(addr + 7, broadcast + 7, 3)) | |
786 | return 0; | |
787 | return 1; | |
788 | } | |
789 | ||
c4028958 | 790 | void ipoib_mcast_restart_task(struct work_struct *work) |
1da177e4 | 791 | { |
c4028958 DH |
792 | struct ipoib_dev_priv *priv = |
793 | container_of(work, struct ipoib_dev_priv, restart_task); | |
794 | struct net_device *dev = priv->dev; | |
22bedad3 | 795 | struct netdev_hw_addr *ha; |
1da177e4 LT |
796 | struct ipoib_mcast *mcast, *tmcast; |
797 | LIST_HEAD(remove_list); | |
798 | unsigned long flags; | |
335a64a5 | 799 | struct ib_sa_mcmember_rec rec; |
1da177e4 | 800 | |
69911416 DL |
801 | if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) |
802 | /* | |
803 | * shortcut...on shutdown flush is called next, just | |
804 | * let it do all the work | |
805 | */ | |
806 | return; | |
1da177e4 | 807 | |
69911416 | 808 | ipoib_dbg_mcast(priv, "restarting multicast task\n"); |
4e0ab200 | 809 | |
932ff279 | 810 | local_irq_save(flags); |
e308a5d8 | 811 | netif_addr_lock(dev); |
78bfe0b5 | 812 | spin_lock(&priv->lock); |
1da177e4 LT |
813 | |
814 | /* | |
815 | * Unfortunately, the networking core only gives us a list of all of | |
816 | * the multicast hardware addresses. We need to figure out which ones | |
817 | * are new and which ones have been removed | |
818 | */ | |
819 | ||
820 | /* Clear out the found flag */ | |
821 | list_for_each_entry(mcast, &priv->multicast_list, list) | |
822 | clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
823 | ||
824 | /* Mark all of the entries that are found or don't exist */ | |
22bedad3 | 825 | netdev_for_each_mc_addr(ha, dev) { |
1da177e4 LT |
826 | union ib_gid mgid; |
827 | ||
22bedad3 | 828 | if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast)) |
5e47596b JG |
829 | continue; |
830 | ||
22bedad3 | 831 | memcpy(mgid.raw, ha->addr + 4, sizeof mgid); |
1da177e4 | 832 | |
1da177e4 LT |
833 | mcast = __ipoib_mcast_find(dev, &mgid); |
834 | if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
835 | struct ipoib_mcast *nmcast; | |
836 | ||
335a64a5 OG |
837 | /* ignore group which is directly joined by userspace */ |
838 | if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) && | |
839 | !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) { | |
5b095d98 | 840 | ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n", |
fcace2fe | 841 | mgid.raw); |
335a64a5 OG |
842 | continue; |
843 | } | |
844 | ||
1da177e4 | 845 | /* Not found or send-only group, let's add a new entry */ |
5b095d98 | 846 | ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n", |
fcace2fe | 847 | mgid.raw); |
1da177e4 LT |
848 | |
849 | nmcast = ipoib_mcast_alloc(dev, 0); | |
850 | if (!nmcast) { | |
851 | ipoib_warn(priv, "unable to allocate memory for multicast structure\n"); | |
852 | continue; | |
853 | } | |
854 | ||
855 | set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags); | |
856 | ||
857 | nmcast->mcmember.mgid = mgid; | |
858 | ||
859 | if (mcast) { | |
860 | /* Destroy the send only entry */ | |
179e0917 | 861 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
862 | |
863 | rb_replace_node(&mcast->rb_node, | |
864 | &nmcast->rb_node, | |
865 | &priv->multicast_tree); | |
866 | } else | |
867 | __ipoib_mcast_add(dev, nmcast); | |
868 | ||
869 | list_add_tail(&nmcast->list, &priv->multicast_list); | |
870 | } | |
871 | ||
872 | if (mcast) | |
873 | set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags); | |
874 | } | |
875 | ||
876 | /* Remove all of the entries don't exist anymore */ | |
877 | list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) { | |
878 | if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) && | |
879 | !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) { | |
5b095d98 | 880 | ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n", |
fcace2fe | 881 | mcast->mcmember.mgid.raw); |
1da177e4 LT |
882 | |
883 | rb_erase(&mcast->rb_node, &priv->multicast_tree); | |
884 | ||
885 | /* Move to the remove list */ | |
179e0917 | 886 | list_move_tail(&mcast->list, &remove_list); |
1da177e4 LT |
887 | } |
888 | } | |
78bfe0b5 MT |
889 | |
890 | spin_unlock(&priv->lock); | |
e308a5d8 | 891 | netif_addr_unlock(dev); |
932ff279 | 892 | local_irq_restore(flags); |
1da177e4 | 893 | |
69911416 DL |
894 | /* |
895 | * make sure the in-flight joins have finished before we attempt | |
896 | * to leave | |
897 | */ | |
898 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) | |
899 | if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) | |
900 | wait_for_completion(&mcast->done); | |
901 | ||
1da177e4 LT |
902 | list_for_each_entry_safe(mcast, tmcast, &remove_list, list) { |
903 | ipoib_mcast_leave(mcast->dev, mcast); | |
904 | ipoib_mcast_free(mcast); | |
905 | } | |
962121b4 | 906 | |
69911416 DL |
907 | /* |
908 | * Double check that we are still up | |
909 | */ | |
910 | if (test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) { | |
911 | spin_lock_irqsave(&priv->lock, flags); | |
912 | __ipoib_mcast_schedule_join_thread(priv, NULL, 0); | |
913 | spin_unlock_irqrestore(&priv->lock, flags); | |
914 | } | |
1da177e4 LT |
915 | } |
916 | ||
8ae5a8a2 RD |
917 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG |
918 | ||
1da177e4 LT |
919 | struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev) |
920 | { | |
921 | struct ipoib_mcast_iter *iter; | |
922 | ||
923 | iter = kmalloc(sizeof *iter, GFP_KERNEL); | |
924 | if (!iter) | |
925 | return NULL; | |
926 | ||
927 | iter->dev = dev; | |
1732b0ef | 928 | memset(iter->mgid.raw, 0, 16); |
1da177e4 LT |
929 | |
930 | if (ipoib_mcast_iter_next(iter)) { | |
1732b0ef | 931 | kfree(iter); |
1da177e4 LT |
932 | return NULL; |
933 | } | |
934 | ||
935 | return iter; | |
936 | } | |
937 | ||
1da177e4 LT |
938 | int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter) |
939 | { | |
940 | struct ipoib_dev_priv *priv = netdev_priv(iter->dev); | |
941 | struct rb_node *n; | |
942 | struct ipoib_mcast *mcast; | |
943 | int ret = 1; | |
944 | ||
945 | spin_lock_irq(&priv->lock); | |
946 | ||
947 | n = rb_first(&priv->multicast_tree); | |
948 | ||
949 | while (n) { | |
950 | mcast = rb_entry(n, struct ipoib_mcast, rb_node); | |
951 | ||
952 | if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw, | |
953 | sizeof (union ib_gid)) < 0) { | |
954 | iter->mgid = mcast->mcmember.mgid; | |
955 | iter->created = mcast->created; | |
956 | iter->queuelen = skb_queue_len(&mcast->pkt_queue); | |
957 | iter->complete = !!mcast->ah; | |
958 | iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY)); | |
959 | ||
960 | ret = 0; | |
961 | ||
962 | break; | |
963 | } | |
964 | ||
965 | n = rb_next(n); | |
966 | } | |
967 | ||
968 | spin_unlock_irq(&priv->lock); | |
969 | ||
970 | return ret; | |
971 | } | |
972 | ||
973 | void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter, | |
974 | union ib_gid *mgid, | |
975 | unsigned long *created, | |
976 | unsigned int *queuelen, | |
977 | unsigned int *complete, | |
978 | unsigned int *send_only) | |
979 | { | |
980 | *mgid = iter->mgid; | |
981 | *created = iter->created; | |
982 | *queuelen = iter->queuelen; | |
983 | *complete = iter->complete; | |
984 | *send_only = iter->send_only; | |
985 | } | |
8ae5a8a2 RD |
986 | |
987 | #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ |