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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
Roland Dreier2a1d9b72005-08-10 23:03:10 -07003 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 */
34
35#include <linux/skbuff.h>
36#include <linux/rtnetlink.h>
Paul Gortmakerfec14d22011-08-30 12:32:52 -040037#include <linux/moduleparam.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090044#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020046#include <net/dst.h>
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include "ipoib.h"
49
50#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
51static int mcast_debug_level;
52
53module_param(mcast_debug_level, int, 0644);
54MODULE_PARM_DESC(mcast_debug_level,
55 "Enable multicast debug tracing if > 0");
56#endif
57
Ingo Molnar95ed6442006-01-13 14:51:39 -080058static DEFINE_MUTEX(mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060struct ipoib_mcast_iter {
61 struct net_device *dev;
62 union ib_gid mgid;
63 unsigned long created;
64 unsigned int queuelen;
65 unsigned int complete;
66 unsigned int send_only;
67};
68
69static void ipoib_mcast_free(struct ipoib_mcast *mcast)
70{
71 struct net_device *dev = mcast->dev;
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -080072 int tx_dropped = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Harvey Harrison5b095d9892008-10-29 12:52:50 -070074 ipoib_dbg_mcast(netdev_priv(dev), "deleting multicast group %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -070075 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +000077 /* remove all neigh connected to this mcast */
78 ipoib_del_neighs_by_gid(dev, mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (mcast->ah)
81 ipoib_put_ah(mcast->ah);
82
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -080083 while (!skb_queue_empty(&mcast->pkt_queue)) {
84 ++tx_dropped;
Roland Dreier8c608a32005-11-07 10:49:38 -080085 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -080086 }
87
Roland Dreier943c2462008-09-30 10:36:21 -070088 netif_tx_lock_bh(dev);
Roland Dreierde903512007-09-28 15:33:51 -070089 dev->stats.tx_dropped += tx_dropped;
Roland Dreier943c2462008-09-30 10:36:21 -070090 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 kfree(mcast);
93}
94
95static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
96 int can_sleep)
97{
98 struct ipoib_mcast *mcast;
99
Roland Dreierde6eb662005-11-02 07:23:14 -0800100 mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (!mcast)
102 return NULL;
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 mcast->dev = dev;
105 mcast->created = jiffies;
Hal Rosenstockce5b65c2005-09-18 13:47:53 -0700106 mcast->backoff = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 INIT_LIST_HEAD(&mcast->list);
109 INIT_LIST_HEAD(&mcast->neigh_list);
110 skb_queue_head_init(&mcast->pkt_queue);
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 return mcast;
113}
114
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300115static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116{
117 struct ipoib_dev_priv *priv = netdev_priv(dev);
118 struct rb_node *n = priv->multicast_tree.rb_node;
119
120 while (n) {
121 struct ipoib_mcast *mcast;
122 int ret;
123
124 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
125
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300126 ret = memcmp(mgid, mcast->mcmember.mgid.raw,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 sizeof (union ib_gid));
128 if (ret < 0)
129 n = n->rb_left;
130 else if (ret > 0)
131 n = n->rb_right;
132 else
133 return mcast;
134 }
135
136 return NULL;
137}
138
139static int __ipoib_mcast_add(struct net_device *dev, struct ipoib_mcast *mcast)
140{
141 struct ipoib_dev_priv *priv = netdev_priv(dev);
142 struct rb_node **n = &priv->multicast_tree.rb_node, *pn = NULL;
143
144 while (*n) {
145 struct ipoib_mcast *tmcast;
146 int ret;
147
148 pn = *n;
149 tmcast = rb_entry(pn, struct ipoib_mcast, rb_node);
150
151 ret = memcmp(mcast->mcmember.mgid.raw, tmcast->mcmember.mgid.raw,
152 sizeof (union ib_gid));
153 if (ret < 0)
154 n = &pn->rb_left;
155 else if (ret > 0)
156 n = &pn->rb_right;
157 else
158 return -EEXIST;
159 }
160
161 rb_link_node(&mcast->rb_node, pn, n);
162 rb_insert_color(&mcast->rb_node, &priv->multicast_tree);
163
164 return 0;
165}
166
167static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
168 struct ib_sa_mcmember_rec *mcmember)
169{
170 struct net_device *dev = mcast->dev;
171 struct ipoib_dev_priv *priv = netdev_priv(dev);
Eli Cohen7343b232006-02-27 20:47:43 -0800172 struct ipoib_ah *ah;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 int ret;
Eli Cohend0de1362008-07-14 23:48:50 -0700174 int set_qkey = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 mcast->mcmember = *mcmember;
177
Patrick McHardybea1e222012-08-30 07:01:30 +0000178 /* Set the multicast MTU and cached Q_Key before we attach if it's
179 * the broadcast group.
180 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
182 sizeof (union ib_gid))) {
Jack Morgensteine1d50dc2008-05-20 15:41:09 -0700183 spin_lock_irq(&priv->lock);
184 if (!priv->broadcast) {
185 spin_unlock_irq(&priv->lock);
186 return -EAGAIN;
187 }
Patrick McHardybea1e222012-08-30 07:01:30 +0000188 priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
Jack Morgensteine1d50dc2008-05-20 15:41:09 -0700190 spin_unlock_irq(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
Eli Cohend0de1362008-07-14 23:48:50 -0700192 set_qkey = 1;
Patrick McHardybea1e222012-08-30 07:01:30 +0000193
194 if (!ipoib_cm_admin_enabled(dev)) {
195 rtnl_lock();
196 dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu));
197 rtnl_unlock();
198 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 }
200
201 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
202 if (test_and_set_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700203 ipoib_warn(priv, "multicast group %pI6 already attached\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700204 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 return 0;
207 }
208
209 ret = ipoib_mcast_attach(dev, be16_to_cpu(mcast->mcmember.mlid),
Eli Cohend0de1362008-07-14 23:48:50 -0700210 &mcast->mcmember.mgid, set_qkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (ret < 0) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700212 ipoib_warn(priv, "couldn't attach QP to multicast group %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700213 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags);
216 return ret;
217 }
218 }
219
220 {
221 struct ib_ah_attr av = {
222 .dlid = be16_to_cpu(mcast->mcmember.mlid),
223 .port_num = priv->port,
224 .sl = mcast->mcmember.sl,
225 .ah_flags = IB_AH_GRH,
Jack Morgensteinbf6a9e32006-04-10 09:43:47 -0700226 .static_rate = mcast->mcmember.rate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 .grh = {
228 .flow_label = be32_to_cpu(mcast->mcmember.flow_label),
229 .hop_limit = mcast->mcmember.hop_limit,
230 .sgid_index = 0,
231 .traffic_class = mcast->mcmember.traffic_class
232 }
233 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 av.grh.dgid = mcast->mcmember.mgid;
235
Eli Cohen7343b232006-02-27 20:47:43 -0800236 ah = ipoib_create_ah(dev, priv->pd, &av);
Mike Marciniszyn38743972011-11-21 08:43:54 -0500237 if (IS_ERR(ah)) {
238 ipoib_warn(priv, "ib_address_create failed %ld\n",
239 -PTR_ERR(ah));
240 /* use original error */
241 return PTR_ERR(ah);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 } else {
Or Gerlitz624d01f2006-07-24 10:42:00 +0300243 spin_lock_irq(&priv->lock);
244 mcast->ah = ah;
245 spin_unlock_irq(&priv->lock);
246
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700247 ipoib_dbg_mcast(priv, "MGID %pI6 AV %p, LID 0x%04x, SL %d\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700248 mcast->mcmember.mgid.raw,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 mcast->ah->ah,
250 be16_to_cpu(mcast->mcmember.mlid),
251 mcast->mcmember.sl);
252 }
253 }
254
255 /* actually send any queued packets */
Roland Dreier943c2462008-09-30 10:36:21 -0700256 netif_tx_lock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 while (!skb_queue_empty(&mcast->pkt_queue)) {
258 struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
David S. Miller69cce1d2011-07-17 23:09:49 -0700259
Roland Dreier943c2462008-09-30 10:36:21 -0700260 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 skb->dev = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 if (dev_queue_xmit(skb))
264 ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
Roland Dreier936d7de2012-02-07 14:51:21 +0000265
Roland Dreier943c2462008-09-30 10:36:21 -0700266 netif_tx_lock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 }
Roland Dreier943c2462008-09-30 10:36:21 -0700268 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
270 return 0;
271}
272
Sean Heftyfaec2f72007-02-15 17:00:17 -0800273static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274ipoib_mcast_sendonly_join_complete(int status,
Sean Heftyfaec2f72007-02-15 17:00:17 -0800275 struct ib_sa_multicast *multicast)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Sean Heftyfaec2f72007-02-15 17:00:17 -0800277 struct ipoib_mcast *mcast = multicast->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 struct net_device *dev = mcast->dev;
279
Sean Heftyfaec2f72007-02-15 17:00:17 -0800280 /* We trap for port events ourselves. */
281 if (status == -ENETRESET)
282 return 0;
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 if (!status)
Sean Heftyfaec2f72007-02-15 17:00:17 -0800285 status = ipoib_mcast_join_finish(mcast, &multicast->rec);
286
287 if (status) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (mcast->logcount++ < 20)
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700289 ipoib_dbg_mcast(netdev_priv(dev), "multicast join failed for %pI6, status %d\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700290 mcast->mcmember.mgid.raw, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 /* Flush out any queued packets */
Roland Dreier943c2462008-09-30 10:36:21 -0700293 netif_tx_lock_bh(dev);
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -0800294 while (!skb_queue_empty(&mcast->pkt_queue)) {
Roland Dreierde903512007-09-28 15:33:51 -0700295 ++dev->stats.tx_dropped;
Roland Dreier8c608a32005-11-07 10:49:38 -0800296 dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -0800297 }
Roland Dreier943c2462008-09-30 10:36:21 -0700298 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 /* Clear the busy flag so we try again */
Sean Heftyfaec2f72007-02-15 17:00:17 -0800301 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY,
302 &mcast->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 }
Sean Heftyfaec2f72007-02-15 17:00:17 -0800304 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
307static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
308{
309 struct net_device *dev = mcast->dev;
310 struct ipoib_dev_priv *priv = netdev_priv(dev);
311 struct ib_sa_mcmember_rec rec = {
312#if 0 /* Some SMs don't support send-only yet */
313 .join_state = 4
314#else
315 .join_state = 1
316#endif
317 };
318 int ret = 0;
319
320 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags)) {
321 ipoib_dbg_mcast(priv, "device shutting down, no multicast joins\n");
322 return -ENODEV;
323 }
324
325 if (test_and_set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)) {
326 ipoib_dbg_mcast(priv, "multicast entry busy, skipping\n");
327 return -EBUSY;
328 }
329
330 rec.mgid = mcast->mcmember.mgid;
331 rec.port_gid = priv->local_gid;
Sean Hefty97f52eb2005-08-13 21:05:57 -0700332 rec.pkey = cpu_to_be16(priv->pkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Sean Heftyfaec2f72007-02-15 17:00:17 -0800334 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca,
335 priv->port, &rec,
336 IB_SA_MCMEMBER_REC_MGID |
337 IB_SA_MCMEMBER_REC_PORT_GID |
338 IB_SA_MCMEMBER_REC_PKEY |
339 IB_SA_MCMEMBER_REC_JOIN_STATE,
340 GFP_ATOMIC,
341 ipoib_mcast_sendonly_join_complete,
342 mcast);
343 if (IS_ERR(mcast->mc)) {
344 ret = PTR_ERR(mcast->mc);
345 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
346 ipoib_warn(priv, "ib_sa_join_multicast failed (ret = %d)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 ret);
348 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700349 ipoib_dbg_mcast(priv, "no multicast record for %pI6, starting join\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700350 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
352
353 return ret;
354}
355
Yossi Etigine8224e42008-09-16 11:57:45 -0700356void ipoib_mcast_carrier_on_task(struct work_struct *work)
357{
358 struct ipoib_dev_priv *priv = container_of(work, struct ipoib_dev_priv,
359 carrier_on_task);
Moni Shoua5ee951202009-09-24 12:01:05 -0700360 struct ib_port_attr attr;
Yossi Etigine8224e42008-09-16 11:57:45 -0700361
362 /*
363 * Take rtnl_lock to avoid racing with ipoib_stop() and
364 * turning the carrier back on while a device is being
365 * removed.
366 */
Moni Shoua5ee951202009-09-24 12:01:05 -0700367 if (ib_query_port(priv->ca, priv->port, &attr) ||
368 attr.state != IB_PORT_ACTIVE) {
369 ipoib_dbg(priv, "Keeping carrier off until IB port is active\n");
370 return;
371 }
372
Yossi Etigine8224e42008-09-16 11:57:45 -0700373 rtnl_lock();
374 netif_carrier_on(priv->dev);
375 rtnl_unlock();
376}
377
Sean Heftyfaec2f72007-02-15 17:00:17 -0800378static int ipoib_mcast_join_complete(int status,
379 struct ib_sa_multicast *multicast)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380{
Sean Heftyfaec2f72007-02-15 17:00:17 -0800381 struct ipoib_mcast *mcast = multicast->context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 struct net_device *dev = mcast->dev;
383 struct ipoib_dev_priv *priv = netdev_priv(dev);
384
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700385 ipoib_dbg_mcast(priv, "join completion for %pI6 (status %d)\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700386 mcast->mcmember.mgid.raw, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Sean Heftyfaec2f72007-02-15 17:00:17 -0800388 /* We trap for port events ourselves. */
389 if (status == -ENETRESET)
390 return 0;
391
392 if (!status)
393 status = ipoib_mcast_join_finish(mcast, &multicast->rec);
394
395 if (!status) {
Hal Rosenstockce5b65c2005-09-18 13:47:53 -0700396 mcast->backoff = 1;
Ingo Molnar95ed6442006-01-13 14:51:39 -0800397 mutex_lock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
David Howellsc4028952006-11-22 14:57:56 +0000399 queue_delayed_work(ipoib_workqueue,
400 &priv->mcast_task, 0);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800401 mutex_unlock(&mcast_mutex);
Shirley Ma55c9add2007-03-08 14:59:30 -0800402
Yossi Etigine8224e42008-09-16 11:57:45 -0700403 /*
404 * Defer carrier on work to ipoib_workqueue to avoid a
405 * deadlock on rtnl_lock here.
406 */
407 if (mcast == priv->broadcast)
408 queue_work(ipoib_workqueue, &priv->carrier_on_task);
Shirley Ma55c9add2007-03-08 14:59:30 -0800409
Sean Heftyfaec2f72007-02-15 17:00:17 -0800410 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 }
412
Sean Heftyfaec2f72007-02-15 17:00:17 -0800413 if (mcast->logcount++ < 20) {
Yossi Etigin3c209622009-01-16 13:42:59 -0800414 if (status == -ETIMEDOUT || status == -EAGAIN) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700415 ipoib_dbg_mcast(priv, "multicast join failed for %pI6, status %d\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700416 mcast->mcmember.mgid.raw, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 } else {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700418 ipoib_warn(priv, "multicast join failed for %pI6, status %d\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700419 mcast->mcmember.mgid.raw, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
421 }
422
423 mcast->backoff *= 2;
424 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
425 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
426
Sean Heftyfaec2f72007-02-15 17:00:17 -0800427 /* Clear the busy flag so we try again */
428 status = test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
429
Michael S. Tsirkin9acf6a82006-03-02 11:07:47 -0800430 mutex_lock(&mcast_mutex);
Michael S. Tsirkin9acf6a82006-03-02 11:07:47 -0800431 spin_lock_irq(&priv->lock);
Sean Heftyfaec2f72007-02-15 17:00:17 -0800432 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
433 queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
434 mcast->backoff * HZ);
Michael S. Tsirkin9acf6a82006-03-02 11:07:47 -0800435 spin_unlock_irq(&priv->lock);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800436 mutex_unlock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Sean Heftyfaec2f72007-02-15 17:00:17 -0800438 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439}
440
441static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
442 int create)
443{
444 struct ipoib_dev_priv *priv = netdev_priv(dev);
445 struct ib_sa_mcmember_rec rec = {
446 .join_state = 1
447 };
448 ib_sa_comp_mask comp_mask;
449 int ret = 0;
450
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700451 ipoib_dbg_mcast(priv, "joining MGID %pI6\n", mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
453 rec.mgid = mcast->mcmember.mgid;
454 rec.port_gid = priv->local_gid;
Sean Hefty97f52eb2005-08-13 21:05:57 -0700455 rec.pkey = cpu_to_be16(priv->pkey);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457 comp_mask =
458 IB_SA_MCMEMBER_REC_MGID |
459 IB_SA_MCMEMBER_REC_PORT_GID |
460 IB_SA_MCMEMBER_REC_PKEY |
461 IB_SA_MCMEMBER_REC_JOIN_STATE;
462
463 if (create) {
464 comp_mask |=
Roland Dreierd0df6d62006-09-22 15:22:56 -0700465 IB_SA_MCMEMBER_REC_QKEY |
466 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
467 IB_SA_MCMEMBER_REC_MTU |
468 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS |
469 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
470 IB_SA_MCMEMBER_REC_RATE |
471 IB_SA_MCMEMBER_REC_SL |
472 IB_SA_MCMEMBER_REC_FLOW_LABEL |
473 IB_SA_MCMEMBER_REC_HOP_LIMIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 rec.qkey = priv->broadcast->mcmember.qkey;
Roland Dreierd0df6d62006-09-22 15:22:56 -0700476 rec.mtu_selector = IB_SA_EQ;
477 rec.mtu = priv->broadcast->mcmember.mtu;
478 rec.traffic_class = priv->broadcast->mcmember.traffic_class;
479 rec.rate_selector = IB_SA_EQ;
480 rec.rate = priv->broadcast->mcmember.rate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 rec.sl = priv->broadcast->mcmember.sl;
482 rec.flow_label = priv->broadcast->mcmember.flow_label;
Roland Dreierd0df6d62006-09-22 15:22:56 -0700483 rec.hop_limit = priv->broadcast->mcmember.hop_limit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 }
485
Sean Heftyfaec2f72007-02-15 17:00:17 -0800486 set_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
487 mcast->mc = ib_sa_join_multicast(&ipoib_sa_client, priv->ca, priv->port,
488 &rec, comp_mask, GFP_KERNEL,
489 ipoib_mcast_join_complete, mcast);
490 if (IS_ERR(mcast->mc)) {
491 clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
492 ret = PTR_ERR(mcast->mc);
493 ipoib_warn(priv, "ib_sa_join_multicast failed, status %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495 mcast->backoff *= 2;
496 if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
497 mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
498
Ingo Molnar95ed6442006-01-13 14:51:39 -0800499 mutex_lock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
501 queue_delayed_work(ipoib_workqueue,
502 &priv->mcast_task,
Hal Rosenstockce5b65c2005-09-18 13:47:53 -0700503 mcast->backoff * HZ);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800504 mutex_unlock(&mcast_mutex);
Sean Heftyfaec2f72007-02-15 17:00:17 -0800505 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506}
507
David Howellsc4028952006-11-22 14:57:56 +0000508void ipoib_mcast_join_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
David Howellsc4028952006-11-22 14:57:56 +0000510 struct ipoib_dev_priv *priv =
511 container_of(work, struct ipoib_dev_priv, mcast_task.work);
512 struct net_device *dev = priv->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
515 return;
516
517 if (ib_query_gid(priv->ca, priv->port, 0, &priv->local_gid))
Michael S. Tsirkin24bd1e42007-05-18 16:12:54 +0300518 ipoib_warn(priv, "ib_query_gid() failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 else
520 memcpy(priv->dev->dev_addr + 4, priv->local_gid.raw, sizeof (union ib_gid));
521
522 {
523 struct ib_port_attr attr;
524
Roland Dreier658bcef2007-02-21 20:28:05 -0800525 if (!ib_query_port(priv->ca, priv->port, &attr))
526 priv->local_lid = attr.lid;
527 else
Sean Heftyfaec2f72007-02-15 17:00:17 -0800528 ipoib_warn(priv, "ib_query_port failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 }
530
531 if (!priv->broadcast) {
Roland Dreier20b83382006-02-11 12:22:12 -0800532 struct ipoib_mcast *broadcast;
533
Yossi Etigin50df48f2009-01-12 19:28:42 -0800534 if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
535 return;
536
Roland Dreier20b83382006-02-11 12:22:12 -0800537 broadcast = ipoib_mcast_alloc(dev, 1);
538 if (!broadcast) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 ipoib_warn(priv, "failed to allocate broadcast group\n");
Ingo Molnar95ed6442006-01-13 14:51:39 -0800540 mutex_lock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
542 queue_delayed_work(ipoib_workqueue,
543 &priv->mcast_task, HZ);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800544 mutex_unlock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 return;
546 }
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 spin_lock_irq(&priv->lock);
Roland Dreier20b83382006-02-11 12:22:12 -0800549 memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
550 sizeof (union ib_gid));
551 priv->broadcast = broadcast;
552
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 __ipoib_mcast_add(dev, priv->broadcast);
554 spin_unlock_irq(&priv->lock);
555 }
556
557 if (!test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
Sean Heftyfaec2f72007-02-15 17:00:17 -0800558 if (!test_bit(IPOIB_MCAST_FLAG_BUSY, &priv->broadcast->flags))
559 ipoib_mcast_join(dev, priv->broadcast, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 return;
561 }
562
563 while (1) {
564 struct ipoib_mcast *mcast = NULL;
565
566 spin_lock_irq(&priv->lock);
567 list_for_each_entry(mcast, &priv->multicast_list, list) {
568 if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)
569 && !test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags)
570 && !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
571 /* Found the next unjoined group */
572 break;
573 }
574 }
575 spin_unlock_irq(&priv->lock);
576
577 if (&mcast->list == &priv->multicast_list) {
578 /* All done */
579 break;
580 }
581
582 ipoib_mcast_join(dev, mcast, 1);
583 return;
584 }
585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");
587
588 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589}
590
591int ipoib_mcast_start_thread(struct net_device *dev)
592{
593 struct ipoib_dev_priv *priv = netdev_priv(dev);
594
595 ipoib_dbg_mcast(priv, "starting multicast thread\n");
596
Ingo Molnar95ed6442006-01-13 14:51:39 -0800597 mutex_lock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
David Howellsc4028952006-11-22 14:57:56 +0000599 queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800600 mutex_unlock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602 return 0;
603}
604
Roland Dreier8d2cae02005-09-20 10:52:04 -0700605int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606{
607 struct ipoib_dev_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609 ipoib_dbg_mcast(priv, "stopping multicast thread\n");
610
Ingo Molnar95ed6442006-01-13 14:51:39 -0800611 mutex_lock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 clear_bit(IPOIB_MCAST_RUN, &priv->flags);
613 cancel_delayed_work(&priv->mcast_task);
Ingo Molnar95ed6442006-01-13 14:51:39 -0800614 mutex_unlock(&mcast_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Roland Dreier8d2cae02005-09-20 10:52:04 -0700616 if (flush)
617 flush_workqueue(ipoib_workqueue);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 return 0;
620}
621
622static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
623{
624 struct ipoib_dev_priv *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 int ret = 0;
626
Sean Heftye07832b2007-03-19 14:31:36 -0800627 if (test_and_clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
628 ib_sa_free_multicast(mcast->mc);
629
Sean Heftyfaec2f72007-02-15 17:00:17 -0800630 if (test_and_clear_bit(IPOIB_MCAST_FLAG_ATTACHED, &mcast->flags)) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700631 ipoib_dbg_mcast(priv, "leaving MGID %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700632 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Sean Heftyfaec2f72007-02-15 17:00:17 -0800634 /* Remove ourselves from the multicast group */
Roland Dreier9eae5542008-07-14 23:48:50 -0700635 ret = ib_detach_mcast(priv->qp, &mcast->mcmember.mgid,
636 be16_to_cpu(mcast->mcmember.mlid));
Sean Heftyfaec2f72007-02-15 17:00:17 -0800637 if (ret)
Roland Dreier9eae5542008-07-14 23:48:50 -0700638 ipoib_warn(priv, "ib_detach_mcast failed (result = %d)\n", ret);
Sean Heftyfaec2f72007-02-15 17:00:17 -0800639 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 return 0;
642}
643
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000644void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645{
646 struct ipoib_dev_priv *priv = netdev_priv(dev);
647 struct ipoib_mcast *mcast;
Roland Dreier943c2462008-09-30 10:36:21 -0700648 unsigned long flags;
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000649 void *mgid = daddr + 4;
David S. Miller700db992012-07-05 21:08:05 -0700650
Roland Dreier943c2462008-09-30 10:36:21 -0700651 spin_lock_irqsave(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Or Gerlitzb3e27492008-03-11 16:10:02 +0200653 if (!test_bit(IPOIB_FLAG_OPER_UP, &priv->flags) ||
Roland Dreier20b83382006-02-11 12:22:12 -0800654 !priv->broadcast ||
655 !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
Roland Dreierde903512007-09-28 15:33:51 -0700656 ++dev->stats.tx_dropped;
Michael S. Tsirkin479a0792006-02-07 16:37:08 -0800657 dev_kfree_skb_any(skb);
658 goto unlock;
659 }
660
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 mcast = __ipoib_mcast_find(dev, mgid);
662 if (!mcast) {
663 /* Let's create a new send only group now */
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700664 ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700665 mgid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667 mcast = ipoib_mcast_alloc(dev, 0);
668 if (!mcast) {
669 ipoib_warn(priv, "unable to allocate memory for "
670 "multicast structure\n");
Roland Dreierde903512007-09-28 15:33:51 -0700671 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 dev_kfree_skb_any(skb);
673 goto out;
674 }
675
676 set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
Jack Morgenstein37c22a72006-05-29 19:14:05 +0300677 memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 __ipoib_mcast_add(dev, mcast);
679 list_add_tail(&mcast->list, &priv->multicast_list);
680 }
681
682 if (!mcast->ah) {
683 if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
684 skb_queue_tail(&mcast->pkt_queue, skb);
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -0800685 else {
Roland Dreierde903512007-09-28 15:33:51 -0700686 ++dev->stats.tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 dev_kfree_skb_any(skb);
Michael S. Tsirkinb36f170b62006-01-17 12:19:40 -0800688 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Sean Heftyfaec2f72007-02-15 17:00:17 -0800690 if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 ipoib_dbg_mcast(priv, "no address vector, "
692 "but multicast join already started\n");
693 else if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags))
694 ipoib_mcast_sendonly_join(mcast);
695
696 /*
697 * If lookup completes between here and out:, don't
698 * want to send packet twice.
699 */
700 mcast = NULL;
701 }
702
703out:
704 if (mcast && mcast->ah) {
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000705 struct ipoib_neigh *neigh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000707 spin_unlock_irqrestore(&priv->lock, flags);
708 neigh = ipoib_neigh_get(dev, daddr);
709 spin_lock_irqsave(&priv->lock, flags);
710 if (!neigh) {
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000711 neigh = ipoib_neigh_alloc(daddr, dev);
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000712 if (neigh) {
713 kref_get(&mcast->ah->ref);
714 neigh->ah = mcast->ah;
715 list_add_tail(&neigh->list, &mcast->neigh_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 }
717 }
Roland Dreier721d67c2009-09-05 20:23:40 -0700718 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
Shlomo Pongratzb63b70d2012-07-24 17:05:22 +0000720 if (neigh)
721 ipoib_neigh_put(neigh);
Roland Dreier721d67c2009-09-05 20:23:40 -0700722 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 }
724
Michael S. Tsirkin479a0792006-02-07 16:37:08 -0800725unlock:
Roland Dreier943c2462008-09-30 10:36:21 -0700726 spin_unlock_irqrestore(&priv->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
729void ipoib_mcast_dev_flush(struct net_device *dev)
730{
731 struct ipoib_dev_priv *priv = netdev_priv(dev);
732 LIST_HEAD(remove_list);
Eli Cohen988bd502006-01-12 14:32:20 -0800733 struct ipoib_mcast *mcast, *tmcast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 unsigned long flags;
735
736 ipoib_dbg_mcast(priv, "flushing multicast list\n");
737
738 spin_lock_irqsave(&priv->lock, flags);
Eli Cohen988bd502006-01-12 14:32:20 -0800739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
Eli Cohen988bd502006-01-12 14:32:20 -0800741 list_del(&mcast->list);
742 rb_erase(&mcast->rb_node, &priv->multicast_tree);
743 list_add_tail(&mcast->list, &remove_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 }
745
746 if (priv->broadcast) {
Roland Dreier3cd96562006-09-22 15:22:46 -0700747 rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
Eli Cohen988bd502006-01-12 14:32:20 -0800748 list_add_tail(&priv->broadcast->list, &remove_list);
749 priv->broadcast = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 }
751
752 spin_unlock_irqrestore(&priv->lock, flags);
753
754 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
755 ipoib_mcast_leave(dev, mcast);
756 ipoib_mcast_free(mcast);
757 }
758}
759
Jiri Pirko3e4aa122010-03-22 03:21:39 +0000760static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast)
Jason Gunthorpe5e475962009-09-05 20:23:40 -0700761{
Jason Gunthorpe5e475962009-09-05 20:23:40 -0700762 /* reserved QPN, prefix, scope */
763 if (memcmp(addr, broadcast, 6))
764 return 0;
765 /* signature lower, pkey */
766 if (memcmp(addr + 7, broadcast + 7, 3))
767 return 0;
768 return 1;
769}
770
David Howellsc4028952006-11-22 14:57:56 +0000771void ipoib_mcast_restart_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772{
David Howellsc4028952006-11-22 14:57:56 +0000773 struct ipoib_dev_priv *priv =
774 container_of(work, struct ipoib_dev_priv, restart_task);
775 struct net_device *dev = priv->dev;
Jiri Pirko22bedad32010-04-01 21:22:57 +0000776 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 struct ipoib_mcast *mcast, *tmcast;
778 LIST_HEAD(remove_list);
779 unsigned long flags;
Or Gerlitz335a64a5a2007-10-08 10:13:00 +0200780 struct ib_sa_mcmember_rec rec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
782 ipoib_dbg_mcast(priv, "restarting multicast task\n");
783
Roland Dreier8d2cae02005-09-20 10:52:04 -0700784 ipoib_mcast_stop_thread(dev, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Herbert Xu932ff272006-06-09 12:20:56 -0700786 local_irq_save(flags);
David S. Millere308a5d2008-07-15 00:13:44 -0700787 netif_addr_lock(dev);
Michael S. Tsirkin78bfe0b2006-01-11 11:47:34 -0800788 spin_lock(&priv->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790 /*
791 * Unfortunately, the networking core only gives us a list of all of
792 * the multicast hardware addresses. We need to figure out which ones
793 * are new and which ones have been removed
794 */
795
796 /* Clear out the found flag */
797 list_for_each_entry(mcast, &priv->multicast_list, list)
798 clear_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
799
800 /* Mark all of the entries that are found or don't exist */
Jiri Pirko22bedad32010-04-01 21:22:57 +0000801 netdev_for_each_mc_addr(ha, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 union ib_gid mgid;
803
Jiri Pirko22bedad32010-04-01 21:22:57 +0000804 if (!ipoib_mcast_addr_is_valid(ha->addr, dev->broadcast))
Jason Gunthorpe5e475962009-09-05 20:23:40 -0700805 continue;
806
Jiri Pirko22bedad32010-04-01 21:22:57 +0000807 memcpy(mgid.raw, ha->addr + 4, sizeof mgid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 mcast = __ipoib_mcast_find(dev, &mgid);
810 if (!mcast || test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
811 struct ipoib_mcast *nmcast;
812
Or Gerlitz335a64a5a2007-10-08 10:13:00 +0200813 /* ignore group which is directly joined by userspace */
814 if (test_bit(IPOIB_FLAG_UMCAST, &priv->flags) &&
815 !ib_sa_get_mcmember_rec(priv->ca, priv->port, &mgid, &rec)) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700816 ipoib_dbg_mcast(priv, "ignoring multicast entry for mgid %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700817 mgid.raw);
Or Gerlitz335a64a5a2007-10-08 10:13:00 +0200818 continue;
819 }
820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 /* Not found or send-only group, let's add a new entry */
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700822 ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700823 mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
825 nmcast = ipoib_mcast_alloc(dev, 0);
826 if (!nmcast) {
827 ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
828 continue;
829 }
830
831 set_bit(IPOIB_MCAST_FLAG_FOUND, &nmcast->flags);
832
833 nmcast->mcmember.mgid = mgid;
834
835 if (mcast) {
836 /* Destroy the send only entry */
Akinobu Mita179e0912006-06-26 00:24:41 -0700837 list_move_tail(&mcast->list, &remove_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839 rb_replace_node(&mcast->rb_node,
840 &nmcast->rb_node,
841 &priv->multicast_tree);
842 } else
843 __ipoib_mcast_add(dev, nmcast);
844
845 list_add_tail(&nmcast->list, &priv->multicast_list);
846 }
847
848 if (mcast)
849 set_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags);
850 }
851
852 /* Remove all of the entries don't exist anymore */
853 list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
854 if (!test_bit(IPOIB_MCAST_FLAG_FOUND, &mcast->flags) &&
855 !test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
Harvey Harrison5b095d9892008-10-29 12:52:50 -0700856 ipoib_dbg_mcast(priv, "deleting multicast group %pI6\n",
Harvey Harrisonfcace2f2008-10-28 22:37:22 -0700857 mcast->mcmember.mgid.raw);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
859 rb_erase(&mcast->rb_node, &priv->multicast_tree);
860
861 /* Move to the remove list */
Akinobu Mita179e0912006-06-26 00:24:41 -0700862 list_move_tail(&mcast->list, &remove_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 }
864 }
Michael S. Tsirkin78bfe0b2006-01-11 11:47:34 -0800865
866 spin_unlock(&priv->lock);
David S. Millere308a5d2008-07-15 00:13:44 -0700867 netif_addr_unlock(dev);
Herbert Xu932ff272006-06-09 12:20:56 -0700868 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870 /* We have to cancel outside of the spinlock */
871 list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
872 ipoib_mcast_leave(mcast->dev, mcast);
873 ipoib_mcast_free(mcast);
874 }
875
876 if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags))
877 ipoib_mcast_start_thread(dev);
878}
879
Roland Dreier8ae5a8a2005-11-02 20:51:01 -0800880#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
883{
884 struct ipoib_mcast_iter *iter;
885
886 iter = kmalloc(sizeof *iter, GFP_KERNEL);
887 if (!iter)
888 return NULL;
889
890 iter->dev = dev;
Roland Dreier1732b0e2005-11-07 10:33:11 -0800891 memset(iter->mgid.raw, 0, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
893 if (ipoib_mcast_iter_next(iter)) {
Roland Dreier1732b0e2005-11-07 10:33:11 -0800894 kfree(iter);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 return NULL;
896 }
897
898 return iter;
899}
900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
902{
903 struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
904 struct rb_node *n;
905 struct ipoib_mcast *mcast;
906 int ret = 1;
907
908 spin_lock_irq(&priv->lock);
909
910 n = rb_first(&priv->multicast_tree);
911
912 while (n) {
913 mcast = rb_entry(n, struct ipoib_mcast, rb_node);
914
915 if (memcmp(iter->mgid.raw, mcast->mcmember.mgid.raw,
916 sizeof (union ib_gid)) < 0) {
917 iter->mgid = mcast->mcmember.mgid;
918 iter->created = mcast->created;
919 iter->queuelen = skb_queue_len(&mcast->pkt_queue);
920 iter->complete = !!mcast->ah;
921 iter->send_only = !!(mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY));
922
923 ret = 0;
924
925 break;
926 }
927
928 n = rb_next(n);
929 }
930
931 spin_unlock_irq(&priv->lock);
932
933 return ret;
934}
935
936void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
937 union ib_gid *mgid,
938 unsigned long *created,
939 unsigned int *queuelen,
940 unsigned int *complete,
941 unsigned int *send_only)
942{
943 *mgid = iter->mgid;
944 *created = iter->created;
945 *queuelen = iter->queuelen;
946 *complete = iter->complete;
947 *send_only = iter->send_only;
948}
Roland Dreier8ae5a8a2005-11-02 20:51:01 -0800949
950#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */