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IB/core: Add subnet prefix to port info
[deliverable/linux.git] / drivers / infiniband / core / sa_query.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
43506d95 3 * Copyright (c) 2005 Voltaire, Inc. All rights reserved.
c1a0b23b 4 * Copyright (c) 2006 Intel Corporation. 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/module.h>
36#include <linux/init.h>
37#include <linux/err.h>
38#include <linux/random.h>
39#include <linux/spinlock.h>
40#include <linux/slab.h>
1da177e4
LT		 41#include <linux/dma-mapping.h>
42#include <linux/kref.h>
43#include <linux/idr.h>
4e57b681 44#include <linux/workqueue.h>
dd5f03be 45#include <uapi/linux/if_ether.h>
a4d61e84 46#include <rdma/ib_pack.h>
6d969a47 47#include <rdma/ib_cache.h>
2ca546b9
KW		 48#include <rdma/rdma_netlink.h>
49#include <net/netlink.h>
50#include <uapi/rdma/ib_user_sa.h>
51#include <rdma/ib_marshall.h>
20029832 52#include <rdma/ib_addr.h>
faec2f7b 53#include "sa.h"
20029832 54#include "core_priv.h"
1da177e4
LT		 55
56MODULE_AUTHOR("Roland Dreier");
57MODULE_DESCRIPTION("InfiniBand subnet administration query support");
58MODULE_LICENSE("Dual BSD/GPL");
59
2ca546b9
KW		 60#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
61#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
62#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
63static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
64
1da177e4
LT		 65struct ib_sa_sm_ah {
66 struct ib_ah *ah;
67 struct kref ref;
2aec5c60 68 u16 pkey_index;
d0e7bb14 69 u8 src_path_mask;
1da177e4
LT		 70};
71
72struct ib_sa_port {
73 struct ib_mad_agent *agent;
1da177e4
LT		 74 struct ib_sa_sm_ah *sm_ah;
75 struct work_struct update_task;
76 spinlock_t ah_lock;
77 u8 port_num;
78};
79
80struct ib_sa_device {
81 int start_port, end_port;
82 struct ib_event_handler event_handler;
83 struct ib_sa_port port[0];
84};
85
86struct ib_sa_query {
87 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
88 void (*release)(struct ib_sa_query *);
c1a0b23b 89 struct ib_sa_client *client;
34816ad9
SH		 90 struct ib_sa_port *port;
91 struct ib_mad_send_buf *mad_buf;
92 struct ib_sa_sm_ah *sm_ah;
93 int id;
2ca546b9
KW		 94 u32 flags;
95 struct list_head list; /* Local svc request list */
96 u32 seq; /* Local svc request sequence number */
97 unsigned long timeout; /* Local svc timeout */
98 u8 path_use; /* How will the pathrecord be used */
1da177e4
LT		 99};
100
2ca546b9
KW		 101#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
102#define IB_SA_CANCEL 0x00000002
103
cbae32c5
HR		 104struct ib_sa_service_query {
105 void (*callback)(int, struct ib_sa_service_rec *, void *);
106 void *context;
107 struct ib_sa_query sa_query;
108};
109
1da177e4
LT		 110struct ib_sa_path_query {
111 void (*callback)(int, struct ib_sa_path_rec *, void *);
112 void *context;
113 struct ib_sa_query sa_query;
114};
115
aeab97ed
ES		 116struct ib_sa_guidinfo_query {
117 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
118 void *context;
119 struct ib_sa_query sa_query;
120};
121
1da177e4
LT		 122struct ib_sa_mcmember_query {
123 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
124 void *context;
125 struct ib_sa_query sa_query;
126};
127
2ca546b9
KW		 128static LIST_HEAD(ib_nl_request_list);
129static DEFINE_SPINLOCK(ib_nl_request_lock);
130static atomic_t ib_nl_sa_request_seq;
131static struct workqueue_struct *ib_nl_wq;
132static struct delayed_work ib_nl_timed_work;
133static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
134 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
135 .len = sizeof(struct ib_path_rec_data)},
136 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
137 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
138 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
139 .len = sizeof(struct rdma_nla_ls_gid)},
140 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
141 .len = sizeof(struct rdma_nla_ls_gid)},
142 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
143 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
144 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
145};
146
147
1da177e4 148static void ib_sa_add_one(struct ib_device *device);
7c1eb45a 149static void ib_sa_remove_one(struct ib_device *device, void *client_data);
1da177e4
LT		 150
151static struct ib_client sa_client = {
152 .name = "sa",
153 .add = ib_sa_add_one,
154 .remove = ib_sa_remove_one
155};
156
6276e08a 157static DEFINE_SPINLOCK(idr_lock);
1da177e4
LT		 158static DEFINE_IDR(query_idr);
159
6276e08a 160static DEFINE_SPINLOCK(tid_lock);
1da177e4
LT		 161static u32 tid;
162
1da177e4
LT		 163#define PATH_REC_FIELD(field) \
164 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
165 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
166 .field_name = "sa_path_rec:" #field
167
168static const struct ib_field path_rec_table[] = {
733d65fe 169 { PATH_REC_FIELD(service_id),
1da177e4
LT		 170 .offset_words = 0,
171 .offset_bits = 0,
733d65fe 172 .size_bits = 64 },
1da177e4
LT		 173 { PATH_REC_FIELD(dgid),
174 .offset_words = 2,
175 .offset_bits = 0,
176 .size_bits = 128 },
177 { PATH_REC_FIELD(sgid),
178 .offset_words = 6,
179 .offset_bits = 0,
180 .size_bits = 128 },
181 { PATH_REC_FIELD(dlid),
182 .offset_words = 10,
183 .offset_bits = 0,
184 .size_bits = 16 },
185 { PATH_REC_FIELD(slid),
186 .offset_words = 10,
187 .offset_bits = 16,
188 .size_bits = 16 },
189 { PATH_REC_FIELD(raw_traffic),
190 .offset_words = 11,
191 .offset_bits = 0,
192 .size_bits = 1 },
193 { RESERVED,
194 .offset_words = 11,
195 .offset_bits = 1,
196 .size_bits = 3 },
197 { PATH_REC_FIELD(flow_label),
198 .offset_words = 11,
199 .offset_bits = 4,
200 .size_bits = 20 },
201 { PATH_REC_FIELD(hop_limit),
202 .offset_words = 11,
203 .offset_bits = 24,
204 .size_bits = 8 },
205 { PATH_REC_FIELD(traffic_class),
206 .offset_words = 12,
207 .offset_bits = 0,
208 .size_bits = 8 },
209 { PATH_REC_FIELD(reversible),
210 .offset_words = 12,
211 .offset_bits = 8,
212 .size_bits = 1 },
213 { PATH_REC_FIELD(numb_path),
214 .offset_words = 12,
215 .offset_bits = 9,
216 .size_bits = 7 },
217 { PATH_REC_FIELD(pkey),
218 .offset_words = 12,
219 .offset_bits = 16,
220 .size_bits = 16 },
733d65fe 221 { PATH_REC_FIELD(qos_class),
1da177e4
LT		 222 .offset_words = 13,
223 .offset_bits = 0,
224 .size_bits = 12 },
225 { PATH_REC_FIELD(sl),
226 .offset_words = 13,
227 .offset_bits = 12,
228 .size_bits = 4 },
229 { PATH_REC_FIELD(mtu_selector),
230 .offset_words = 13,
231 .offset_bits = 16,
232 .size_bits = 2 },
233 { PATH_REC_FIELD(mtu),
234 .offset_words = 13,
235 .offset_bits = 18,
236 .size_bits = 6 },
237 { PATH_REC_FIELD(rate_selector),
238 .offset_words = 13,
239 .offset_bits = 24,
240 .size_bits = 2 },
241 { PATH_REC_FIELD(rate),
242 .offset_words = 13,
243 .offset_bits = 26,
244 .size_bits = 6 },
245 { PATH_REC_FIELD(packet_life_time_selector),
246 .offset_words = 14,
247 .offset_bits = 0,
248 .size_bits = 2 },
249 { PATH_REC_FIELD(packet_life_time),
250 .offset_words = 14,
251 .offset_bits = 2,
252 .size_bits = 6 },
253 { PATH_REC_FIELD(preference),
254 .offset_words = 14,
255 .offset_bits = 8,
256 .size_bits = 8 },
257 { RESERVED,
258 .offset_words = 14,
259 .offset_bits = 16,
260 .size_bits = 48 },
261};
262
263#define MCMEMBER_REC_FIELD(field) \
264 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
265 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
266 .field_name = "sa_mcmember_rec:" #field
267
268static const struct ib_field mcmember_rec_table[] = {
269 { MCMEMBER_REC_FIELD(mgid),
270 .offset_words = 0,
271 .offset_bits = 0,
272 .size_bits = 128 },
273 { MCMEMBER_REC_FIELD(port_gid),
274 .offset_words = 4,
275 .offset_bits = 0,
276 .size_bits = 128 },
277 { MCMEMBER_REC_FIELD(qkey),
278 .offset_words = 8,
279 .offset_bits = 0,
280 .size_bits = 32 },
281 { MCMEMBER_REC_FIELD(mlid),
282 .offset_words = 9,
283 .offset_bits = 0,
284 .size_bits = 16 },
285 { MCMEMBER_REC_FIELD(mtu_selector),
286 .offset_words = 9,
287 .offset_bits = 16,
288 .size_bits = 2 },
289 { MCMEMBER_REC_FIELD(mtu),
290 .offset_words = 9,
291 .offset_bits = 18,
292 .size_bits = 6 },
293 { MCMEMBER_REC_FIELD(traffic_class),
294 .offset_words = 9,
295 .offset_bits = 24,
296 .size_bits = 8 },
297 { MCMEMBER_REC_FIELD(pkey),
298 .offset_words = 10,
299 .offset_bits = 0,
300 .size_bits = 16 },
301 { MCMEMBER_REC_FIELD(rate_selector),
302 .offset_words = 10,
303 .offset_bits = 16,
304 .size_bits = 2 },
305 { MCMEMBER_REC_FIELD(rate),
306 .offset_words = 10,
307 .offset_bits = 18,
308 .size_bits = 6 },
309 { MCMEMBER_REC_FIELD(packet_life_time_selector),
310 .offset_words = 10,
311 .offset_bits = 24,
312 .size_bits = 2 },
313 { MCMEMBER_REC_FIELD(packet_life_time),
314 .offset_words = 10,
315 .offset_bits = 26,
316 .size_bits = 6 },
317 { MCMEMBER_REC_FIELD(sl),
318 .offset_words = 11,
319 .offset_bits = 0,
320 .size_bits = 4 },
321 { MCMEMBER_REC_FIELD(flow_label),
322 .offset_words = 11,
323 .offset_bits = 4,
324 .size_bits = 20 },
325 { MCMEMBER_REC_FIELD(hop_limit),
326 .offset_words = 11,
327 .offset_bits = 24,
328 .size_bits = 8 },
329 { MCMEMBER_REC_FIELD(scope),
330 .offset_words = 12,
331 .offset_bits = 0,
332 .size_bits = 4 },
333 { MCMEMBER_REC_FIELD(join_state),
334 .offset_words = 12,
335 .offset_bits = 4,
336 .size_bits = 4 },
337 { MCMEMBER_REC_FIELD(proxy_join),
338 .offset_words = 12,
339 .offset_bits = 8,
340 .size_bits = 1 },
341 { RESERVED,
342 .offset_words = 12,
343 .offset_bits = 9,
344 .size_bits = 23 },
345};
346
cbae32c5
HR		 347#define SERVICE_REC_FIELD(field) \
348 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
349 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
350 .field_name = "sa_service_rec:" #field
351
352static const struct ib_field service_rec_table[] = {
353 { SERVICE_REC_FIELD(id),
354 .offset_words = 0,
355 .offset_bits = 0,
356 .size_bits = 64 },
357 { SERVICE_REC_FIELD(gid),
358 .offset_words = 2,
359 .offset_bits = 0,
360 .size_bits = 128 },
361 { SERVICE_REC_FIELD(pkey),
362 .offset_words = 6,
363 .offset_bits = 0,
364 .size_bits = 16 },
365 { SERVICE_REC_FIELD(lease),
366 .offset_words = 7,
367 .offset_bits = 0,
368 .size_bits = 32 },
369 { SERVICE_REC_FIELD(key),
370 .offset_words = 8,
371 .offset_bits = 0,
372 .size_bits = 128 },
373 { SERVICE_REC_FIELD(name),
374 .offset_words = 12,
375 .offset_bits = 0,
376 .size_bits = 64*8 },
377 { SERVICE_REC_FIELD(data8),
378 .offset_words = 28,
379 .offset_bits = 0,
380 .size_bits = 16*8 },
381 { SERVICE_REC_FIELD(data16),
382 .offset_words = 32,
383 .offset_bits = 0,
384 .size_bits = 8*16 },
385 { SERVICE_REC_FIELD(data32),
386 .offset_words = 36,
387 .offset_bits = 0,
388 .size_bits = 4*32 },
389 { SERVICE_REC_FIELD(data64),
390 .offset_words = 40,
391 .offset_bits = 0,
392 .size_bits = 2*64 },
393};
394
aeab97ed
ES		 395#define GUIDINFO_REC_FIELD(field) \
396 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
397 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
398 .field_name = "sa_guidinfo_rec:" #field
399
400static const struct ib_field guidinfo_rec_table[] = {
401 { GUIDINFO_REC_FIELD(lid),
402 .offset_words = 0,
403 .offset_bits = 0,
404 .size_bits = 16 },
405 { GUIDINFO_REC_FIELD(block_num),
406 .offset_words = 0,
407 .offset_bits = 16,
408 .size_bits = 8 },
409 { GUIDINFO_REC_FIELD(res1),
410 .offset_words = 0,
411 .offset_bits = 24,
412 .size_bits = 8 },
413 { GUIDINFO_REC_FIELD(res2),
414 .offset_words = 1,
415 .offset_bits = 0,
416 .size_bits = 32 },
417 { GUIDINFO_REC_FIELD(guid_info_list),
418 .offset_words = 2,
419 .offset_bits = 0,
420 .size_bits = 512 },
421};
422
2ca546b9
KW		 423static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
424{
425 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
426}
427
428static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
429{
430 return (query->flags & IB_SA_CANCEL);
431}
432
433static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
434 struct ib_sa_query *query)
435{
436 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
437 struct ib_sa_mad *mad = query->mad_buf->mad;
438 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
439 u16 val16;
440 u64 val64;
441 struct rdma_ls_resolve_header *header;
442
443 query->mad_buf->context[1] = NULL;
444
445 /* Construct the family header first */
446 header = (struct rdma_ls_resolve_header *)
447 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
448 memcpy(header->device_name, query->port->agent->device->name,
449 LS_DEVICE_NAME_MAX);
450 header->port_num = query->port->port_num;
451
452 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
453 sa_rec->reversible != 0)
454 query->path_use = LS_RESOLVE_PATH_USE_GMP;
455 else
456 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
457 header->path_use = query->path_use;
458
459 /* Now build the attributes */
460 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
461 val64 = be64_to_cpu(sa_rec->service_id);
462 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
463 sizeof(val64), &val64);
464 }
465 if (comp_mask & IB_SA_PATH_REC_DGID)
466 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
467 sizeof(sa_rec->dgid), &sa_rec->dgid);
468 if (comp_mask & IB_SA_PATH_REC_SGID)
469 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
470 sizeof(sa_rec->sgid), &sa_rec->sgid);
471 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
472 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
473 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
474
475 if (comp_mask & IB_SA_PATH_REC_PKEY) {
476 val16 = be16_to_cpu(sa_rec->pkey);
477 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
478 sizeof(val16), &val16);
479 }
480 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
481 val16 = be16_to_cpu(sa_rec->qos_class);
482 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
483 sizeof(val16), &val16);
484 }
485}
486
487static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
488{
489 int len = 0;
490
491 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
492 len += nla_total_size(sizeof(u64));
493 if (comp_mask & IB_SA_PATH_REC_DGID)
494 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
495 if (comp_mask & IB_SA_PATH_REC_SGID)
496 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
497 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
498 len += nla_total_size(sizeof(u8));
499 if (comp_mask & IB_SA_PATH_REC_PKEY)
500 len += nla_total_size(sizeof(u16));
501 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
502 len += nla_total_size(sizeof(u16));
503
504 /*
505 * Make sure that at least some of the required comp_mask bits are
506 * set.
507 */
508 if (WARN_ON(len == 0))
509 return len;
510
511 /* Add the family header */
512 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
513
514 return len;
515}
516
3ebd2fd0 517static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 518{
519 struct sk_buff *skb = NULL;
520 struct nlmsghdr *nlh;
521 void *data;
522 int ret = 0;
523 struct ib_sa_mad *mad;
524 int len;
525
526 mad = query->mad_buf->mad;
527 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
528 if (len <= 0)
529 return -EMSGSIZE;
530
3ebd2fd0 531 skb = nlmsg_new(len, gfp_mask);
2ca546b9
KW		 532 if (!skb)
533 return -ENOMEM;
534
535 /* Put nlmsg header only for now */
536 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
ba13b5f8 537 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
2ca546b9
KW		 538 if (!data) {
539 kfree_skb(skb);
540 return -EMSGSIZE;
541 }
542
543 /* Add attributes */
544 ib_nl_set_path_rec_attrs(skb, query);
545
546 /* Repair the nlmsg header length */
547 nlmsg_end(skb, nlh);
548
3ebd2fd0 549 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
2ca546b9
KW		 550 if (!ret)
551 ret = len;
552 else
553 ret = 0;
554
555 return ret;
556}
557
3ebd2fd0 558static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
2ca546b9
KW		 559{
560 unsigned long flags;
561 unsigned long delay;
562 int ret;
563
564 INIT_LIST_HEAD(&query->list);
565 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
566
3ebd2fd0 567 /* Put the request on the list first.*/
2ca546b9 568 spin_lock_irqsave(&ib_nl_request_lock, flags);
2ca546b9
KW		 569 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
570 query->timeout = delay + jiffies;
571 list_add_tail(&query->list, &ib_nl_request_list);
572 /* Start the timeout if this is the only request */
573 if (ib_nl_request_list.next == &query->list)
574 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
2ca546b9
KW		 575 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
576
3ebd2fd0
KW		 577 ret = ib_nl_send_msg(query, gfp_mask);
578 if (ret <= 0) {
579 ret = -EIO;
580 /* Remove the request */
581 spin_lock_irqsave(&ib_nl_request_lock, flags);
582 list_del(&query->list);
583 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
584 } else {
585 ret = 0;
586 }
587
2ca546b9
KW		 588 return ret;
589}
590
591static int ib_nl_cancel_request(struct ib_sa_query *query)
592{
593 unsigned long flags;
594 struct ib_sa_query *wait_query;
595 int found = 0;
596
597 spin_lock_irqsave(&ib_nl_request_lock, flags);
598 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
599 /* Let the timeout to take care of the callback */
600 if (query == wait_query) {
601 query->flags |= IB_SA_CANCEL;
602 query->timeout = jiffies;
603 list_move(&query->list, &ib_nl_request_list);
604 found = 1;
605 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
606 break;
607 }
608 }
609 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
610
611 return found;
612}
613
614static void send_handler(struct ib_mad_agent *agent,
615 struct ib_mad_send_wc *mad_send_wc);
616
617static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
618 const struct nlmsghdr *nlh)
619{
620 struct ib_mad_send_wc mad_send_wc;
621 struct ib_sa_mad *mad = NULL;
622 const struct nlattr *head, *curr;
623 struct ib_path_rec_data *rec;
624 int len, rem;
625 u32 mask = 0;
626 int status = -EIO;
627
628 if (query->callback) {
629 head = (const struct nlattr *) nlmsg_data(nlh);
630 len = nlmsg_len(nlh);
631 switch (query->path_use) {
632 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
633 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
634 break;
635
636 case LS_RESOLVE_PATH_USE_ALL:
637 case LS_RESOLVE_PATH_USE_GMP:
638 default:
639 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
640 IB_PATH_BIDIRECTIONAL;
641 break;
642 }
643 nla_for_each_attr(curr, head, len, rem) {
644 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
645 rec = nla_data(curr);
646 /*
647 * Get the first one. In the future, we may
648 * need to get up to 6 pathrecords.
649 */
650 if ((rec->flags & mask) == mask) {
651 mad = query->mad_buf->mad;
652 mad->mad_hdr.method |=
653 IB_MGMT_METHOD_RESP;
654 memcpy(mad->data, rec->path_rec,
655 sizeof(rec->path_rec));
656 status = 0;
657 break;
658 }
659 }
660 }
661 query->callback(query, status, mad);
662 }
663
664 mad_send_wc.send_buf = query->mad_buf;
665 mad_send_wc.status = IB_WC_SUCCESS;
666 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
667}
668
669static void ib_nl_request_timeout(struct work_struct *work)
670{
671 unsigned long flags;
672 struct ib_sa_query *query;
673 unsigned long delay;
674 struct ib_mad_send_wc mad_send_wc;
675 int ret;
676
677 spin_lock_irqsave(&ib_nl_request_lock, flags);
678 while (!list_empty(&ib_nl_request_list)) {
679 query = list_entry(ib_nl_request_list.next,
680 struct ib_sa_query, list);
681
682 if (time_after(query->timeout, jiffies)) {
683 delay = query->timeout - jiffies;
684 if ((long)delay <= 0)
685 delay = 1;
686 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
687 break;
688 }
689
690 list_del(&query->list);
691 ib_sa_disable_local_svc(query);
692 /* Hold the lock to protect against query cancellation */
693 if (ib_sa_query_cancelled(query))
694 ret = -1;
695 else
696 ret = ib_post_send_mad(query->mad_buf, NULL);
697 if (ret) {
698 mad_send_wc.send_buf = query->mad_buf;
699 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
700 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
701 send_handler(query->port->agent, &mad_send_wc);
702 spin_lock_irqsave(&ib_nl_request_lock, flags);
703 }
704 }
705 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
706}
707
708static int ib_nl_handle_set_timeout(struct sk_buff *skb,
709 struct netlink_callback *cb)
710{
711 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
712 int timeout, delta, abs_delta;
713 const struct nlattr *attr;
714 unsigned long flags;
715 struct ib_sa_query *query;
716 long delay = 0;
717 struct nlattr *tb[LS_NLA_TYPE_MAX];
718 int ret;
719
2deeb477
KW		 720 if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
721 !(NETLINK_CB(skb).sk) ||
722 !netlink_capable(skb, CAP_NET_ADMIN))
2ca546b9
KW		 723 return -EPERM;
724
725 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
726 nlmsg_len(nlh), ib_nl_policy);
727 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
728 if (ret || !attr)
729 goto settimeout_out;
730
731 timeout = *(int *) nla_data(attr);
732 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
733 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
734 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
735 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
736
737 delta = timeout - sa_local_svc_timeout_ms;
738 if (delta < 0)
739 abs_delta = -delta;
740 else
741 abs_delta = delta;
742
743 if (delta != 0) {
744 spin_lock_irqsave(&ib_nl_request_lock, flags);
745 sa_local_svc_timeout_ms = timeout;
746 list_for_each_entry(query, &ib_nl_request_list, list) {
747 if (delta < 0 && abs_delta > query->timeout)
748 query->timeout = 0;
749 else
750 query->timeout += delta;
751
752 /* Get the new delay from the first entry */
753 if (!delay) {
754 delay = query->timeout - jiffies;
755 if (delay <= 0)
756 delay = 1;
757 }
758 }
759 if (delay)
760 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
761 (unsigned long)delay);
762 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
763 }
764
765settimeout_out:
766 return skb->len;
767}
768
769static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
770{
771 struct nlattr *tb[LS_NLA_TYPE_MAX];
772 int ret;
773
774 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
775 return 0;
776
777 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
778 nlmsg_len(nlh), ib_nl_policy);
779 if (ret)
780 return 0;
781
782 return 1;
783}
784
785static int ib_nl_handle_resolve_resp(struct sk_buff *skb,
786 struct netlink_callback *cb)
787{
788 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
789 unsigned long flags;
790 struct ib_sa_query *query;
791 struct ib_mad_send_buf *send_buf;
792 struct ib_mad_send_wc mad_send_wc;
793 int found = 0;
794 int ret;
795
2deeb477
KW		 796 if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
797 !(NETLINK_CB(skb).sk) ||
798 !netlink_capable(skb, CAP_NET_ADMIN))
2ca546b9
KW		 799 return -EPERM;
800
801 spin_lock_irqsave(&ib_nl_request_lock, flags);
802 list_for_each_entry(query, &ib_nl_request_list, list) {
803 /*
804 * If the query is cancelled, let the timeout routine
805 * take care of it.
806 */
807 if (nlh->nlmsg_seq == query->seq) {
808 found = !ib_sa_query_cancelled(query);
809 if (found)
810 list_del(&query->list);
811 break;
812 }
813 }
814
815 if (!found) {
816 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
817 goto resp_out;
818 }
819
820 send_buf = query->mad_buf;
821
822 if (!ib_nl_is_good_resolve_resp(nlh)) {
823 /* if the result is a failure, send out the packet via IB */
824 ib_sa_disable_local_svc(query);
825 ret = ib_post_send_mad(query->mad_buf, NULL);
826 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
827 if (ret) {
828 mad_send_wc.send_buf = send_buf;
829 mad_send_wc.status = IB_WC_GENERAL_ERR;
830 send_handler(query->port->agent, &mad_send_wc);
831 }
832 } else {
833 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
834 ib_nl_process_good_resolve_rsp(query, nlh);
835 }
836
837resp_out:
838 return skb->len;
839}
840
841static struct ibnl_client_cbs ib_sa_cb_table[] = {
842 [RDMA_NL_LS_OP_RESOLVE] = {
843 .dump = ib_nl_handle_resolve_resp,
844 .module = THIS_MODULE },
845 [RDMA_NL_LS_OP_SET_TIMEOUT] = {
846 .dump = ib_nl_handle_set_timeout,
847 .module = THIS_MODULE },
848};
849
1da177e4
LT		 850static void free_sm_ah(struct kref *kref)
851{
852 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
853
854 ib_destroy_ah(sm_ah->ah);
855 kfree(sm_ah);
856}
857
c4028958 858static void update_sm_ah(struct work_struct *work)
1da177e4 859{
c4028958
DH		 860 struct ib_sa_port *port =
861 container_of(work, struct ib_sa_port, update_task);
164ba089 862 struct ib_sa_sm_ah *new_ah;
1da177e4
LT		 863 struct ib_port_attr port_attr;
864 struct ib_ah_attr ah_attr;
865
866 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
aba25a3e 867 pr_warn("Couldn't query port\n");
1da177e4
LT		 868 return;
869 }
870
871 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
872 if (!new_ah) {
1da177e4
LT		 873 return;
874 }
875
876 kref_init(&new_ah->ref);
d0e7bb14 877 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
1da177e4 878
2aec5c60
SH		 879 new_ah->pkey_index = 0;
880 if (ib_find_pkey(port->agent->device, port->port_num,
53998910 881 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
aba25a3e 882 pr_err("Couldn't find index for default PKey\n");
2aec5c60 883
1da177e4
LT		 884 memset(&ah_attr, 0, sizeof ah_attr);
885 ah_attr.dlid = port_attr.sm_lid;
886 ah_attr.sl = port_attr.sm_sl;
887 ah_attr.port_num = port->port_num;
888
889 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
890 if (IS_ERR(new_ah->ah)) {
aba25a3e 891 pr_warn("Couldn't create new SM AH\n");
1da177e4
LT		 892 kfree(new_ah);
893 return;
894 }
895
896 spin_lock_irq(&port->ah_lock);
6b708b3d
JM		 897 if (port->sm_ah)
898 kref_put(&port->sm_ah->ref, free_sm_ah);
1da177e4
LT		 899 port->sm_ah = new_ah;
900 spin_unlock_irq(&port->ah_lock);
901
1da177e4
LT		 902}
903
904static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
905{
906 if (event->event == IB_EVENT_PORT_ERR ||
907 event->event == IB_EVENT_PORT_ACTIVE ||
908 event->event == IB_EVENT_LID_CHANGE ||
909 event->event == IB_EVENT_PKEY_CHANGE ||
acaea9ee
JM		 910 event->event == IB_EVENT_SM_CHANGE ||
911 event->event == IB_EVENT_CLIENT_REREGISTER) {
164ba089
MS		 912 unsigned long flags;
913 struct ib_sa_device *sa_dev =
914 container_of(handler, typeof(*sa_dev), event_handler);
915 struct ib_sa_port *port =
916 &sa_dev->port[event->element.port_num - sa_dev->start_port];
917
9247a8eb 918 if (!rdma_cap_ib_sa(handler->device, port->port_num))
fac70d51
EC		 919 return;
920
164ba089
MS		 921 spin_lock_irqsave(&port->ah_lock, flags);
922 if (port->sm_ah)
923 kref_put(&port->sm_ah->ref, free_sm_ah);
924 port->sm_ah = NULL;
925 spin_unlock_irqrestore(&port->ah_lock, flags);
1da177e4 926
f0626710 927 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
1da177e4
LT		 928 sa_dev->start_port].update_task);
929 }
930}
931
c1a0b23b
MT		 932void ib_sa_register_client(struct ib_sa_client *client)
933{
934 atomic_set(&client->users, 1);
935 init_completion(&client->comp);
936}
937EXPORT_SYMBOL(ib_sa_register_client);
938
c1a0b23b
MT		 939void ib_sa_unregister_client(struct ib_sa_client *client)
940{
941 ib_sa_client_put(client);
942 wait_for_completion(&client->comp);
943}
944EXPORT_SYMBOL(ib_sa_unregister_client);
945
1da177e4
LT		 946/**
947 * ib_sa_cancel_query - try to cancel an SA query
948 * @id:ID of query to cancel
949 * @query:query pointer to cancel
950 *
951 * Try to cancel an SA query. If the id and query don't match up or
952 * the query has already completed, nothing is done. Otherwise the
953 * query is canceled and will complete with a status of -EINTR.
954 */
955void ib_sa_cancel_query(int id, struct ib_sa_query *query)
956{
957 unsigned long flags;
958 struct ib_mad_agent *agent;
34816ad9 959 struct ib_mad_send_buf *mad_buf;
1da177e4
LT		 960
961 spin_lock_irqsave(&idr_lock, flags);
962 if (idr_find(&query_idr, id) != query) {
963 spin_unlock_irqrestore(&idr_lock, flags);
964 return;
965 }
966 agent = query->port->agent;
34816ad9 967 mad_buf = query->mad_buf;
1da177e4
LT		 968 spin_unlock_irqrestore(&idr_lock, flags);
969
2ca546b9
KW		 970 /*
971 * If the query is still on the netlink request list, schedule
972 * it to be cancelled by the timeout routine. Otherwise, it has been
973 * sent to the MAD layer and has to be cancelled from there.
974 */
975 if (!ib_nl_cancel_request(query))
976 ib_cancel_mad(agent, mad_buf);
1da177e4
LT		 977}
978EXPORT_SYMBOL(ib_sa_cancel_query);
979
d0e7bb14
SH		 980static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
981{
982 struct ib_sa_device *sa_dev;
983 struct ib_sa_port *port;
984 unsigned long flags;
985 u8 src_path_mask;
986
987 sa_dev = ib_get_client_data(device, &sa_client);
988 if (!sa_dev)
989 return 0x7f;
990
991 port = &sa_dev->port[port_num - sa_dev->start_port];
992 spin_lock_irqsave(&port->ah_lock, flags);
993 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
994 spin_unlock_irqrestore(&port->ah_lock, flags);
995
996 return src_path_mask;
997}
998
6d969a47
SH		 999int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1000 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
1001{
1002 int ret;
1003 u16 gid_index;
20029832
MB		 1004 int use_roce;
1005 struct net_device *ndev = NULL;
6d969a47
SH		 1006
1007 memset(ah_attr, 0, sizeof *ah_attr);
1008 ah_attr->dlid = be16_to_cpu(rec->dlid);
1009 ah_attr->sl = rec->sl;
d0e7bb14
SH		 1010 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1011 get_src_path_mask(device, port_num);
6d969a47 1012 ah_attr->port_num = port_num;
7084f842 1013 ah_attr->static_rate = rec->rate;
6d969a47 1014
20029832
MB		 1015 use_roce = rdma_cap_eth_ah(device, port_num);
1016
1017 if (use_roce) {
1018 struct net_device *idev;
1019 struct net_device *resolved_dev;
1020 struct rdma_dev_addr dev_addr = {.bound_dev_if = rec->ifindex,
1021 .net = rec->net ? rec->net :
1022 &init_net};
1023 union {
1024 struct sockaddr _sockaddr;
1025 struct sockaddr_in _sockaddr_in;
1026 struct sockaddr_in6 _sockaddr_in6;
1027 } sgid_addr, dgid_addr;
1028
1029 if (!device->get_netdev)
1030 return -EOPNOTSUPP;
1031
1032 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1033 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1034
1035 /* validate the route */
1036 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1037 &dgid_addr._sockaddr, &dev_addr);
1038 if (ret)
1039 return ret;
3c86aa70 1040
20029832
MB		 1041 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1042 dev_addr.network == RDMA_NETWORK_IPV6) &&
1043 rec->gid_type != IB_GID_TYPE_ROCE_UDP_ENCAP)
1044 return -EINVAL;
1045
1046 idev = device->get_netdev(device, port_num);
1047 if (!idev)
1048 return -ENODEV;
1049
1050 resolved_dev = dev_get_by_index(dev_addr.net,
1051 dev_addr.bound_dev_if);
1052 if (resolved_dev->flags & IFF_LOOPBACK) {
1053 dev_put(resolved_dev);
1054 resolved_dev = idev;
1055 dev_hold(resolved_dev);
1056 }
1057 ndev = ib_get_ndev_from_path(rec);
1058 rcu_read_lock();
1059 if ((ndev && ndev != resolved_dev) ||
1060 (resolved_dev != idev &&
1061 !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1062 ret = -EHOSTUNREACH;
1063 rcu_read_unlock();
1064 dev_put(idev);
1065 dev_put(resolved_dev);
1066 if (ret) {
1067 if (ndev)
1068 dev_put(ndev);
1069 return ret;
1070 }
1071 }
ba36e37f 1072
20029832 1073 if (rec->hop_limit > 1 || use_roce) {
6d969a47
SH		 1074 ah_attr->ah_flags = IB_AH_GRH;
1075 ah_attr->grh.dgid = rec->dgid;
1076
20029832
MB		 1077 ret = ib_find_cached_gid_by_port(device, &rec->sgid,
1078 rec->gid_type, port_num, ndev,
1079 &gid_index);
ba36e37f
MB		 1080 if (ret) {
1081 if (ndev)
1082 dev_put(ndev);
6d969a47 1083 return ret;
ba36e37f 1084 }
6d969a47 1085
ca222c6b
SH		 1086 ah_attr->grh.sgid_index = gid_index;
1087 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
1088 ah_attr->grh.hop_limit = rec->hop_limit;
6d969a47 1089 ah_attr->grh.traffic_class = rec->traffic_class;
ba36e37f
MB		 1090 if (ndev)
1091 dev_put(ndev);
6d969a47 1092 }
20029832
MB		 1093
1094 if (use_roce)
dd5f03be 1095 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
20029832 1096
6d969a47
SH		 1097 return 0;
1098}
1099EXPORT_SYMBOL(ib_init_ah_from_path);
1100
2aec5c60
SH		 1101static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1102{
1103 unsigned long flags;
1104
1105 spin_lock_irqsave(&query->port->ah_lock, flags);
164ba089
MS		 1106 if (!query->port->sm_ah) {
1107 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1108 return -EAGAIN;
1109 }
2aec5c60
SH		 1110 kref_get(&query->port->sm_ah->ref);
1111 query->sm_ah = query->port->sm_ah;
1112 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1113
1114 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1115 query->sm_ah->pkey_index,
1116 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
da2dfaa3
IW		 1117 gfp_mask,
1118 IB_MGMT_BASE_VERSION);
3c10c7c9 1119 if (IS_ERR(query->mad_buf)) {
2aec5c60
SH		 1120 kref_put(&query->sm_ah->ref, free_sm_ah);
1121 return -ENOMEM;
1122 }
1123
1124 query->mad_buf->ah = query->sm_ah->ah;
1125
1126 return 0;
1127}
1128
1129static void free_mad(struct ib_sa_query *query)
1130{
1131 ib_free_send_mad(query->mad_buf);
1132 kref_put(&query->sm_ah->ref, free_sm_ah);
1133}
1134
1da177e4
LT		 1135static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1136{
1137 unsigned long flags;
1138
1139 memset(mad, 0, sizeof *mad);
1140
1141 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1142 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1143 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1144
1145 spin_lock_irqsave(&tid_lock, flags);
1146 mad->mad_hdr.tid =
1147 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1148 spin_unlock_irqrestore(&tid_lock, flags);
1149}
1150
e322fedf 1151static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1da177e4 1152{
d0164adc 1153 bool preload = gfpflags_allow_blocking(gfp_mask);
1da177e4 1154 unsigned long flags;
34816ad9 1155 int ret, id;
1da177e4 1156
3b069c5d
TH		 1157 if (preload)
1158 idr_preload(gfp_mask);
1da177e4 1159 spin_lock_irqsave(&idr_lock, flags);
3b069c5d
TH		 1160
1161 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1162
1da177e4 1163 spin_unlock_irqrestore(&idr_lock, flags);
3b069c5d
TH		 1164 if (preload)
1165 idr_preload_end();
1166 if (id < 0)
1167 return id;
1da177e4 1168
34816ad9
SH		 1169 query->mad_buf->timeout_ms = timeout_ms;
1170 query->mad_buf->context[0] = query;
1171 query->id = id;
1da177e4 1172
2ca546b9
KW		 1173 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1174 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
3ebd2fd0 1175 if (!ib_nl_make_request(query, gfp_mask))
2ca546b9
KW		 1176 return id;
1177 }
1178 ib_sa_disable_local_svc(query);
1179 }
1180
34816ad9 1181 ret = ib_post_send_mad(query->mad_buf, NULL);
1da177e4 1182 if (ret) {
1da177e4 1183 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1184 idr_remove(&query_idr, id);
1da177e4
LT		 1185 spin_unlock_irqrestore(&idr_lock, flags);
1186 }
1187
dae4c1d2
RD		 1188 /*
1189 * It's not safe to dereference query any more, because the
1190 * send may already have completed and freed the query in
34816ad9 1191 * another context.
dae4c1d2 1192 */
34816ad9 1193 return ret ? ret : id;
1da177e4
LT		 1194}
1195
a7ca1f00
SH		 1196void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1197{
1198 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1199}
1200EXPORT_SYMBOL(ib_sa_unpack_path);
1201
2e08b587
SH		 1202void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1203{
1204 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1205}
1206EXPORT_SYMBOL(ib_sa_pack_path);
1207
1da177e4
LT		 1208static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1209 int status,
1210 struct ib_sa_mad *mad)
1211{
1212 struct ib_sa_path_query *query =
1213 container_of(sa_query, struct ib_sa_path_query, sa_query);
1214
1215 if (mad) {
1216 struct ib_sa_path_rec rec;
1217
1218 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1219 mad->data, &rec);
ba36e37f
MB		 1220 rec.net = NULL;
1221 rec.ifindex = 0;
b39ffa1d 1222 rec.gid_type = IB_GID_TYPE_IB;
db9314cd 1223 eth_zero_addr(rec.dmac);
1da177e4
LT		 1224 query->callback(status, &rec, query->context);
1225 } else
1226 query->callback(status, NULL, query->context);
1227}
1228
1229static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1230{
1da177e4
LT		 1231 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1232}
1233
1234/**
1235 * ib_sa_path_rec_get - Start a Path get query
c1a0b23b 1236 * @client:SA client
1da177e4
LT		 1237 * @device:device to send query on
1238 * @port_num: port number to send query on
1239 * @rec:Path Record to send in query
1240 * @comp_mask:component mask to send in query
1241 * @timeout_ms:time to wait for response
1242 * @gfp_mask:GFP mask to use for internal allocations
1243 * @callback:function called when query completes, times out or is
1244 * canceled
1245 * @context:opaque user context passed to callback
1246 * @sa_query:query context, used to cancel query
1247 *
1248 * Send a Path Record Get query to the SA to look up a path. The
1249 * callback function will be called when the query completes (or
1250 * fails); status is 0 for a successful response, -EINTR if the query
1251 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1252 * occurred sending the query. The resp parameter of the callback is
1253 * only valid if status is 0.
1254 *
1255 * If the return value of ib_sa_path_rec_get() is negative, it is an
1256 * error code. Otherwise it is a query ID that can be used to cancel
1257 * the query.
1258 */
c1a0b23b
MT		 1259int ib_sa_path_rec_get(struct ib_sa_client *client,
1260 struct ib_device *device, u8 port_num,
1da177e4
LT		 1261 struct ib_sa_path_rec *rec,
1262 ib_sa_comp_mask comp_mask,
dd0fc66f 1263 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1264 void (*callback)(int status,
1265 struct ib_sa_path_rec *resp,
1266 void *context),
1267 void *context,
1268 struct ib_sa_query **sa_query)
1269{
1270 struct ib_sa_path_query *query;
1271 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1272 struct ib_sa_port *port;
1273 struct ib_mad_agent *agent;
34816ad9 1274 struct ib_sa_mad *mad;
1da177e4
LT		 1275 int ret;
1276
56c202d6
RD		 1277 if (!sa_dev)
1278 return -ENODEV;
1279
1280 port = &sa_dev->port[port_num - sa_dev->start_port];
1281 agent = port->agent;
1282
5d265770 1283 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1284 if (!query)
1285 return -ENOMEM;
34816ad9 1286
2aec5c60
SH		 1287 query->sa_query.port = port;
1288 ret = alloc_mad(&query->sa_query, gfp_mask);
1289 if (ret)
34816ad9 1290 goto err1;
1da177e4 1291
c1a0b23b
MT		 1292 ib_sa_client_get(client);
1293 query->sa_query.client = client;
1294 query->callback = callback;
1295 query->context = context;
1da177e4 1296
34816ad9
SH		 1297 mad = query->sa_query.mad_buf->mad;
1298 init_mad(mad, agent);
1da177e4 1299
34816ad9
SH		 1300 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1301 query->sa_query.release = ib_sa_path_rec_release;
34816ad9
SH		 1302 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1303 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1304 mad->sa_hdr.comp_mask = comp_mask;
1da177e4 1305
34816ad9 1306 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1da177e4
LT		 1307
1308 *sa_query = &query->sa_query;
dae4c1d2 1309
2ca546b9
KW		 1310 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1311 query->sa_query.mad_buf->context[1] = rec;
1312
e322fedf 1313 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1314 if (ret < 0)
1315 goto err2;
1316
1317 return ret;
1318
1319err2:
1320 *sa_query = NULL;
c1a0b23b 1321 ib_sa_client_put(query->sa_query.client);
2aec5c60 1322 free_mad(&query->sa_query);
1da177e4 1323
34816ad9
SH		 1324err1:
1325 kfree(query);
dae4c1d2 1326 return ret;
1da177e4
LT		 1327}
1328EXPORT_SYMBOL(ib_sa_path_rec_get);
1329
cbae32c5
HR		 1330static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1331 int status,
1332 struct ib_sa_mad *mad)
1333{
1334 struct ib_sa_service_query *query =
1335 container_of(sa_query, struct ib_sa_service_query, sa_query);
1336
1337 if (mad) {
1338 struct ib_sa_service_rec rec;
1339
1340 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1341 mad->data, &rec);
1342 query->callback(status, &rec, query->context);
1343 } else
1344 query->callback(status, NULL, query->context);
1345}
1346
1347static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1348{
cbae32c5
HR		 1349 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1350}
1351
1352/**
1353 * ib_sa_service_rec_query - Start Service Record operation
c1a0b23b 1354 * @client:SA client
cbae32c5
HR		 1355 * @device:device to send request on
1356 * @port_num: port number to send request on
1357 * @method:SA method - should be get, set, or delete
1358 * @rec:Service Record to send in request
1359 * @comp_mask:component mask to send in request
1360 * @timeout_ms:time to wait for response
1361 * @gfp_mask:GFP mask to use for internal allocations
1362 * @callback:function called when request completes, times out or is
1363 * canceled
1364 * @context:opaque user context passed to callback
1365 * @sa_query:request context, used to cancel request
1366 *
1367 * Send a Service Record set/get/delete to the SA to register,
1368 * unregister or query a service record.
1369 * The callback function will be called when the request completes (or
1370 * fails); status is 0 for a successful response, -EINTR if the query
1371 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1372 * occurred sending the query. The resp parameter of the callback is
1373 * only valid if status is 0.
1374 *
1375 * If the return value of ib_sa_service_rec_query() is negative, it is an
1376 * error code. Otherwise it is a request ID that can be used to cancel
1377 * the query.
1378 */
c1a0b23b
MT		 1379int ib_sa_service_rec_query(struct ib_sa_client *client,
1380 struct ib_device *device, u8 port_num, u8 method,
cbae32c5
HR		 1381 struct ib_sa_service_rec *rec,
1382 ib_sa_comp_mask comp_mask,
dd0fc66f 1383 int timeout_ms, gfp_t gfp_mask,
cbae32c5
HR		 1384 void (*callback)(int status,
1385 struct ib_sa_service_rec *resp,
1386 void *context),
1387 void *context,
1388 struct ib_sa_query **sa_query)
1389{
1390 struct ib_sa_service_query *query;
1391 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1392 struct ib_sa_port *port;
1393 struct ib_mad_agent *agent;
34816ad9 1394 struct ib_sa_mad *mad;
cbae32c5
HR		 1395 int ret;
1396
56c202d6
RD		 1397 if (!sa_dev)
1398 return -ENODEV;
1399
1400 port = &sa_dev->port[port_num - sa_dev->start_port];
1401 agent = port->agent;
1402
cbae32c5
HR		 1403 if (method != IB_MGMT_METHOD_GET &&
1404 method != IB_MGMT_METHOD_SET &&
1405 method != IB_SA_METHOD_DELETE)
1406 return -EINVAL;
1407
5d265770 1408 query = kzalloc(sizeof(*query), gfp_mask);
cbae32c5
HR		 1409 if (!query)
1410 return -ENOMEM;
34816ad9 1411
2aec5c60
SH		 1412 query->sa_query.port = port;
1413 ret = alloc_mad(&query->sa_query, gfp_mask);
1414 if (ret)
34816ad9 1415 goto err1;
cbae32c5 1416
c1a0b23b
MT		 1417 ib_sa_client_get(client);
1418 query->sa_query.client = client;
1419 query->callback = callback;
1420 query->context = context;
cbae32c5 1421
34816ad9
SH		 1422 mad = query->sa_query.mad_buf->mad;
1423 init_mad(mad, agent);
cbae32c5 1424
34816ad9
SH		 1425 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1426 query->sa_query.release = ib_sa_service_rec_release;
34816ad9
SH		 1427 mad->mad_hdr.method = method;
1428 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1429 mad->sa_hdr.comp_mask = comp_mask;
cbae32c5
HR		 1430
1431 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
34816ad9 1432 rec, mad->data);
cbae32c5
HR		 1433
1434 *sa_query = &query->sa_query;
1435
e322fedf 1436 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1437 if (ret < 0)
1438 goto err2;
1439
1440 return ret;
cbae32c5 1441
34816ad9
SH		 1442err2:
1443 *sa_query = NULL;
c1a0b23b 1444 ib_sa_client_put(query->sa_query.client);
2aec5c60 1445 free_mad(&query->sa_query);
34816ad9
SH		 1446
1447err1:
1448 kfree(query);
cbae32c5
HR		 1449 return ret;
1450}
1451EXPORT_SYMBOL(ib_sa_service_rec_query);
1452
1da177e4
LT		 1453static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1454 int status,
1455 struct ib_sa_mad *mad)
1456{
1457 struct ib_sa_mcmember_query *query =
1458 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1459
1460 if (mad) {
1461 struct ib_sa_mcmember_rec rec;
1462
1463 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1464 mad->data, &rec);
1465 query->callback(status, &rec, query->context);
1466 } else
1467 query->callback(status, NULL, query->context);
1468}
1469
1470static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1471{
1da177e4
LT		 1472 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1473}
1474
c1a0b23b
MT		 1475int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1476 struct ib_device *device, u8 port_num,
1da177e4
LT		 1477 u8 method,
1478 struct ib_sa_mcmember_rec *rec,
1479 ib_sa_comp_mask comp_mask,
dd0fc66f 1480 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1481 void (*callback)(int status,
1482 struct ib_sa_mcmember_rec *resp,
1483 void *context),
1484 void *context,
1485 struct ib_sa_query **sa_query)
1486{
1487 struct ib_sa_mcmember_query *query;
1488 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1489 struct ib_sa_port *port;
1490 struct ib_mad_agent *agent;
34816ad9 1491 struct ib_sa_mad *mad;
1da177e4
LT		 1492 int ret;
1493
56c202d6
RD		 1494 if (!sa_dev)
1495 return -ENODEV;
1496
1497 port = &sa_dev->port[port_num - sa_dev->start_port];
1498 agent = port->agent;
1499
5d265770 1500 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1501 if (!query)
1502 return -ENOMEM;
34816ad9 1503
2aec5c60
SH		 1504 query->sa_query.port = port;
1505 ret = alloc_mad(&query->sa_query, gfp_mask);
1506 if (ret)
34816ad9 1507 goto err1;
1da177e4 1508
c1a0b23b
MT		 1509 ib_sa_client_get(client);
1510 query->sa_query.client = client;
1511 query->callback = callback;
1512 query->context = context;
1da177e4 1513
34816ad9
SH		 1514 mad = query->sa_query.mad_buf->mad;
1515 init_mad(mad, agent);
1da177e4 1516
34816ad9
SH		 1517 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1518 query->sa_query.release = ib_sa_mcmember_rec_release;
34816ad9
SH		 1519 mad->mad_hdr.method = method;
1520 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1521 mad->sa_hdr.comp_mask = comp_mask;
1da177e4
LT		 1522
1523 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
34816ad9 1524 rec, mad->data);
1da177e4
LT		 1525
1526 *sa_query = &query->sa_query;
dae4c1d2 1527
e322fedf 1528 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1529 if (ret < 0)
1530 goto err2;
1da177e4 1531
dae4c1d2 1532 return ret;
34816ad9
SH		 1533
1534err2:
1535 *sa_query = NULL;
c1a0b23b 1536 ib_sa_client_put(query->sa_query.client);
2aec5c60 1537 free_mad(&query->sa_query);
34816ad9
SH		 1538
1539err1:
1540 kfree(query);
1541 return ret;
1da177e4 1542}
1da177e4 1543
aeab97ed
ES		 1544/* Support GuidInfoRecord */
1545static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1546 int status,
1547 struct ib_sa_mad *mad)
1548{
1549 struct ib_sa_guidinfo_query *query =
1550 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1551
1552 if (mad) {
1553 struct ib_sa_guidinfo_rec rec;
1554
1555 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1556 mad->data, &rec);
1557 query->callback(status, &rec, query->context);
1558 } else
1559 query->callback(status, NULL, query->context);
1560}
1561
1562static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1563{
1564 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1565}
1566
1567int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1568 struct ib_device *device, u8 port_num,
1569 struct ib_sa_guidinfo_rec *rec,
1570 ib_sa_comp_mask comp_mask, u8 method,
1571 int timeout_ms, gfp_t gfp_mask,
1572 void (*callback)(int status,
1573 struct ib_sa_guidinfo_rec *resp,
1574 void *context),
1575 void *context,
1576 struct ib_sa_query **sa_query)
1577{
1578 struct ib_sa_guidinfo_query *query;
1579 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1580 struct ib_sa_port *port;
1581 struct ib_mad_agent *agent;
1582 struct ib_sa_mad *mad;
1583 int ret;
1584
1585 if (!sa_dev)
1586 return -ENODEV;
1587
1588 if (method != IB_MGMT_METHOD_GET &&
1589 method != IB_MGMT_METHOD_SET &&
1590 method != IB_SA_METHOD_DELETE) {
1591 return -EINVAL;
1592 }
1593
1594 port = &sa_dev->port[port_num - sa_dev->start_port];
1595 agent = port->agent;
1596
5d265770 1597 query = kzalloc(sizeof(*query), gfp_mask);
aeab97ed
ES		 1598 if (!query)
1599 return -ENOMEM;
1600
1601 query->sa_query.port = port;
1602 ret = alloc_mad(&query->sa_query, gfp_mask);
1603 if (ret)
1604 goto err1;
1605
1606 ib_sa_client_get(client);
1607 query->sa_query.client = client;
1608 query->callback = callback;
1609 query->context = context;
1610
1611 mad = query->sa_query.mad_buf->mad;
1612 init_mad(mad, agent);
1613
1614 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1615 query->sa_query.release = ib_sa_guidinfo_rec_release;
1616
1617 mad->mad_hdr.method = method;
1618 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1619 mad->sa_hdr.comp_mask = comp_mask;
1620
1621 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1622 mad->data);
1623
1624 *sa_query = &query->sa_query;
1625
1626 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1627 if (ret < 0)
1628 goto err2;
1629
1630 return ret;
1631
1632err2:
1633 *sa_query = NULL;
1634 ib_sa_client_put(query->sa_query.client);
1635 free_mad(&query->sa_query);
1636
1637err1:
1638 kfree(query);
1639 return ret;
1640}
1641EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1642
1da177e4
LT		 1643static void send_handler(struct ib_mad_agent *agent,
1644 struct ib_mad_send_wc *mad_send_wc)
1645{
34816ad9 1646 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1da177e4
LT		 1647 unsigned long flags;
1648
e4f50f00
RD		 1649 if (query->callback)
1650 switch (mad_send_wc->status) {
1651 case IB_WC_SUCCESS:
1652 /* No callback -- already got recv */
1653 break;
1654 case IB_WC_RESP_TIMEOUT_ERR:
1655 query->callback(query, -ETIMEDOUT, NULL);
1656 break;
1657 case IB_WC_WR_FLUSH_ERR:
1658 query->callback(query, -EINTR, NULL);
1659 break;
1660 default:
1661 query->callback(query, -EIO, NULL);
1662 break;
1663 }
1da177e4 1664
1da177e4 1665 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1666 idr_remove(&query_idr, query->id);
1da177e4 1667 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9 1668
2aec5c60 1669 free_mad(query);
c1a0b23b 1670 ib_sa_client_put(query->client);
34816ad9 1671 query->release(query);
1da177e4
LT		 1672}
1673
1674static void recv_handler(struct ib_mad_agent *mad_agent,
ca281265 1675 struct ib_mad_send_buf *send_buf,
1da177e4
LT		 1676 struct ib_mad_recv_wc *mad_recv_wc)
1677{
1678 struct ib_sa_query *query;
1da177e4 1679
ca281265
CH		 1680 if (!send_buf)
1681 return;
1da177e4 1682
ca281265 1683 query = send_buf->context[0];
34816ad9 1684 if (query->callback) {
1da177e4
LT		 1685 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1686 query->callback(query,
1687 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1688 -EINVAL : 0,
1689 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1690 else
1691 query->callback(query, -EIO, NULL);
1692 }
1693
1694 ib_free_recv_mad(mad_recv_wc);
1695}
1696
1697static void ib_sa_add_one(struct ib_device *device)
1698{
1699 struct ib_sa_device *sa_dev;
1700 int s, e, i;
08e3681a 1701 int count = 0;
07ebafba 1702
4139032b
HR		 1703 s = rdma_start_port(device);
1704 e = rdma_end_port(device);
1da177e4 1705
fac70d51 1706 sa_dev = kzalloc(sizeof *sa_dev +
1da177e4
LT		 1707 (e - s + 1) * sizeof (struct ib_sa_port),
1708 GFP_KERNEL);
1709 if (!sa_dev)
1710 return;
1711
1712 sa_dev->start_port = s;
1713 sa_dev->end_port = e;
1714
1715 for (i = 0; i <= e - s; ++i) {
fac70d51 1716 spin_lock_init(&sa_dev->port[i].ah_lock);
fe53ba2f 1717 if (!rdma_cap_ib_sa(device, i + 1))
fac70d51
EC		 1718 continue;
1719
1da177e4
LT		 1720 sa_dev->port[i].sm_ah = NULL;
1721 sa_dev->port[i].port_num = i + s;
1da177e4
LT		 1722
1723 sa_dev->port[i].agent =
1724 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1725 NULL, 0, send_handler,
0f29b46d 1726 recv_handler, sa_dev, 0);
1da177e4
LT		 1727 if (IS_ERR(sa_dev->port[i].agent))
1728 goto err;
1729
c4028958 1730 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
08e3681a
MW		 1731
1732 count++;
1da177e4
LT		 1733 }
1734
08e3681a
MW		 1735 if (!count)
1736 goto free;
1737
1da177e4
LT		 1738 ib_set_client_data(device, &sa_client, sa_dev);
1739
1740 /*
1741 * We register our event handler after everything is set up,
1742 * and then update our cached info after the event handler is
1743 * registered to avoid any problems if a port changes state
1744 * during our initialization.
1745 */
1746
1747 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1748 if (ib_register_event_handler(&sa_dev->event_handler))
1749 goto err;
1750
08e3681a 1751 for (i = 0; i <= e - s; ++i) {
fe53ba2f 1752 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1753 update_sm_ah(&sa_dev->port[i].update_task);
08e3681a 1754 }
1da177e4
LT		 1755
1756 return;
1757
1758err:
08e3681a 1759 while (--i >= 0) {
fe53ba2f 1760 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1761 ib_unregister_mad_agent(sa_dev->port[i].agent);
08e3681a
MW		 1762 }
1763free:
1da177e4 1764 kfree(sa_dev);
1da177e4
LT		 1765 return;
1766}
1767
7c1eb45a 1768static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1da177e4 1769{
7c1eb45a 1770 struct ib_sa_device *sa_dev = client_data;
1da177e4
LT		 1771 int i;
1772
1773 if (!sa_dev)
1774 return;
1775
1776 ib_unregister_event_handler(&sa_dev->event_handler);
1777
96e61fa5 1778 flush_workqueue(ib_wq);
0f47ae0b 1779
1da177e4 1780 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
fe53ba2f 1781 if (rdma_cap_ib_sa(device, i + 1)) {
fac70d51
EC		 1782 ib_unregister_mad_agent(sa_dev->port[i].agent);
1783 if (sa_dev->port[i].sm_ah)
1784 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1785 }
1786
1da177e4
LT		 1787 }
1788
1789 kfree(sa_dev);
1790}
1791
1792static int __init ib_sa_init(void)
1793{
1794 int ret;
1795
1da177e4
LT		 1796 get_random_bytes(&tid, sizeof tid);
1797
2ca546b9
KW		 1798 atomic_set(&ib_nl_sa_request_seq, 0);
1799
1da177e4 1800 ret = ib_register_client(&sa_client);
faec2f7b 1801 if (ret) {
aba25a3e 1802 pr_err("Couldn't register ib_sa client\n");
faec2f7b
SH		 1803 goto err1;
1804 }
1805
1806 ret = mcast_init();
1807 if (ret) {
aba25a3e 1808 pr_err("Couldn't initialize multicast handling\n");
faec2f7b
SH		 1809 goto err2;
1810 }
1da177e4 1811
2ca546b9
KW		 1812 ib_nl_wq = create_singlethread_workqueue("ib_nl_sa_wq");
1813 if (!ib_nl_wq) {
1814 ret = -ENOMEM;
1815 goto err3;
1816 }
1817
1818 if (ibnl_add_client(RDMA_NL_LS, RDMA_NL_LS_NUM_OPS,
1819 ib_sa_cb_table)) {
1820 pr_err("Failed to add netlink callback\n");
1821 ret = -EINVAL;
1822 goto err4;
1823 }
1824 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
1825
faec2f7b 1826 return 0;
2ca546b9
KW		 1827err4:
1828 destroy_workqueue(ib_nl_wq);
1829err3:
1830 mcast_cleanup();
faec2f7b
SH		 1831err2:
1832 ib_unregister_client(&sa_client);
1833err1:
1da177e4
LT		 1834 return ret;
1835}
1836
1837static void __exit ib_sa_cleanup(void)
1838{
2ca546b9
KW		 1839 ibnl_remove_client(RDMA_NL_LS);
1840 cancel_delayed_work(&ib_nl_timed_work);
1841 flush_workqueue(ib_nl_wq);
1842 destroy_workqueue(ib_nl_wq);
faec2f7b 1843 mcast_cleanup();
1da177e4 1844 ib_unregister_client(&sa_client);
5d7edb3c 1845 idr_destroy(&query_idr);
1da177e4
LT		 1846}
1847
1848module_init(ib_sa_init);
1849module_exit(ib_sa_cleanup);
Linux kernel - Deliverables
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