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IB/core: Add netdev and gid attributes paramteres to cache
[linux-2.6-block.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>
faec2f7b 52#include "sa.h"
1da177e4
LT		 53
54MODULE_AUTHOR("Roland Dreier");
55MODULE_DESCRIPTION("InfiniBand subnet administration query support");
56MODULE_LICENSE("Dual BSD/GPL");
57
2ca546b9
KW		 58#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100
59#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000
60#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000
61static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
62
1da177e4
LT		 63struct ib_sa_sm_ah {
64 struct ib_ah *ah;
65 struct kref ref;
2aec5c60 66 u16 pkey_index;
d0e7bb14 67 u8 src_path_mask;
1da177e4
LT		 68};
69
70struct ib_sa_port {
71 struct ib_mad_agent *agent;
1da177e4
LT		 72 struct ib_sa_sm_ah *sm_ah;
73 struct work_struct update_task;
74 spinlock_t ah_lock;
75 u8 port_num;
76};
77
78struct ib_sa_device {
79 int start_port, end_port;
80 struct ib_event_handler event_handler;
81 struct ib_sa_port port[0];
82};
83
84struct ib_sa_query {
85 void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
86 void (*release)(struct ib_sa_query *);
c1a0b23b 87 struct ib_sa_client *client;
34816ad9
SH		 88 struct ib_sa_port *port;
89 struct ib_mad_send_buf *mad_buf;
90 struct ib_sa_sm_ah *sm_ah;
91 int id;
2ca546b9
KW		 92 u32 flags;
93 struct list_head list; /* Local svc request list */
94 u32 seq; /* Local svc request sequence number */
95 unsigned long timeout; /* Local svc timeout */
96 u8 path_use; /* How will the pathrecord be used */
1da177e4
LT		 97};
98
2ca546b9
KW		 99#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
100#define IB_SA_CANCEL 0x00000002
101
cbae32c5
HR		 102struct ib_sa_service_query {
103 void (*callback)(int, struct ib_sa_service_rec *, void *);
104 void *context;
105 struct ib_sa_query sa_query;
106};
107
1da177e4
LT		 108struct ib_sa_path_query {
109 void (*callback)(int, struct ib_sa_path_rec *, void *);
110 void *context;
111 struct ib_sa_query sa_query;
112};
113
aeab97ed
ES		 114struct ib_sa_guidinfo_query {
115 void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
116 void *context;
117 struct ib_sa_query sa_query;
118};
119
1da177e4
LT		 120struct ib_sa_mcmember_query {
121 void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
122 void *context;
123 struct ib_sa_query sa_query;
124};
125
2ca546b9
KW		 126static LIST_HEAD(ib_nl_request_list);
127static DEFINE_SPINLOCK(ib_nl_request_lock);
128static atomic_t ib_nl_sa_request_seq;
129static struct workqueue_struct *ib_nl_wq;
130static struct delayed_work ib_nl_timed_work;
131static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
132 [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY,
133 .len = sizeof(struct ib_path_rec_data)},
134 [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32},
135 [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64},
136 [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY,
137 .len = sizeof(struct rdma_nla_ls_gid)},
138 [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY,
139 .len = sizeof(struct rdma_nla_ls_gid)},
140 [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8},
141 [LS_NLA_TYPE_PKEY] = {.type = NLA_U16},
142 [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16},
143};
144
145
1da177e4 146static void ib_sa_add_one(struct ib_device *device);
7c1eb45a 147static void ib_sa_remove_one(struct ib_device *device, void *client_data);
1da177e4
LT		 148
149static struct ib_client sa_client = {
150 .name = "sa",
151 .add = ib_sa_add_one,
152 .remove = ib_sa_remove_one
153};
154
6276e08a 155static DEFINE_SPINLOCK(idr_lock);
1da177e4
LT		 156static DEFINE_IDR(query_idr);
157
6276e08a 158static DEFINE_SPINLOCK(tid_lock);
1da177e4
LT		 159static u32 tid;
160
1da177e4
LT		 161#define PATH_REC_FIELD(field) \
162 .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
163 .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
164 .field_name = "sa_path_rec:" #field
165
166static const struct ib_field path_rec_table[] = {
733d65fe 167 { PATH_REC_FIELD(service_id),
1da177e4
LT		 168 .offset_words = 0,
169 .offset_bits = 0,
733d65fe 170 .size_bits = 64 },
1da177e4
LT		 171 { PATH_REC_FIELD(dgid),
172 .offset_words = 2,
173 .offset_bits = 0,
174 .size_bits = 128 },
175 { PATH_REC_FIELD(sgid),
176 .offset_words = 6,
177 .offset_bits = 0,
178 .size_bits = 128 },
179 { PATH_REC_FIELD(dlid),
180 .offset_words = 10,
181 .offset_bits = 0,
182 .size_bits = 16 },
183 { PATH_REC_FIELD(slid),
184 .offset_words = 10,
185 .offset_bits = 16,
186 .size_bits = 16 },
187 { PATH_REC_FIELD(raw_traffic),
188 .offset_words = 11,
189 .offset_bits = 0,
190 .size_bits = 1 },
191 { RESERVED,
192 .offset_words = 11,
193 .offset_bits = 1,
194 .size_bits = 3 },
195 { PATH_REC_FIELD(flow_label),
196 .offset_words = 11,
197 .offset_bits = 4,
198 .size_bits = 20 },
199 { PATH_REC_FIELD(hop_limit),
200 .offset_words = 11,
201 .offset_bits = 24,
202 .size_bits = 8 },
203 { PATH_REC_FIELD(traffic_class),
204 .offset_words = 12,
205 .offset_bits = 0,
206 .size_bits = 8 },
207 { PATH_REC_FIELD(reversible),
208 .offset_words = 12,
209 .offset_bits = 8,
210 .size_bits = 1 },
211 { PATH_REC_FIELD(numb_path),
212 .offset_words = 12,
213 .offset_bits = 9,
214 .size_bits = 7 },
215 { PATH_REC_FIELD(pkey),
216 .offset_words = 12,
217 .offset_bits = 16,
218 .size_bits = 16 },
733d65fe 219 { PATH_REC_FIELD(qos_class),
1da177e4
LT		 220 .offset_words = 13,
221 .offset_bits = 0,
222 .size_bits = 12 },
223 { PATH_REC_FIELD(sl),
224 .offset_words = 13,
225 .offset_bits = 12,
226 .size_bits = 4 },
227 { PATH_REC_FIELD(mtu_selector),
228 .offset_words = 13,
229 .offset_bits = 16,
230 .size_bits = 2 },
231 { PATH_REC_FIELD(mtu),
232 .offset_words = 13,
233 .offset_bits = 18,
234 .size_bits = 6 },
235 { PATH_REC_FIELD(rate_selector),
236 .offset_words = 13,
237 .offset_bits = 24,
238 .size_bits = 2 },
239 { PATH_REC_FIELD(rate),
240 .offset_words = 13,
241 .offset_bits = 26,
242 .size_bits = 6 },
243 { PATH_REC_FIELD(packet_life_time_selector),
244 .offset_words = 14,
245 .offset_bits = 0,
246 .size_bits = 2 },
247 { PATH_REC_FIELD(packet_life_time),
248 .offset_words = 14,
249 .offset_bits = 2,
250 .size_bits = 6 },
251 { PATH_REC_FIELD(preference),
252 .offset_words = 14,
253 .offset_bits = 8,
254 .size_bits = 8 },
255 { RESERVED,
256 .offset_words = 14,
257 .offset_bits = 16,
258 .size_bits = 48 },
259};
260
261#define MCMEMBER_REC_FIELD(field) \
262 .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
263 .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
264 .field_name = "sa_mcmember_rec:" #field
265
266static const struct ib_field mcmember_rec_table[] = {
267 { MCMEMBER_REC_FIELD(mgid),
268 .offset_words = 0,
269 .offset_bits = 0,
270 .size_bits = 128 },
271 { MCMEMBER_REC_FIELD(port_gid),
272 .offset_words = 4,
273 .offset_bits = 0,
274 .size_bits = 128 },
275 { MCMEMBER_REC_FIELD(qkey),
276 .offset_words = 8,
277 .offset_bits = 0,
278 .size_bits = 32 },
279 { MCMEMBER_REC_FIELD(mlid),
280 .offset_words = 9,
281 .offset_bits = 0,
282 .size_bits = 16 },
283 { MCMEMBER_REC_FIELD(mtu_selector),
284 .offset_words = 9,
285 .offset_bits = 16,
286 .size_bits = 2 },
287 { MCMEMBER_REC_FIELD(mtu),
288 .offset_words = 9,
289 .offset_bits = 18,
290 .size_bits = 6 },
291 { MCMEMBER_REC_FIELD(traffic_class),
292 .offset_words = 9,
293 .offset_bits = 24,
294 .size_bits = 8 },
295 { MCMEMBER_REC_FIELD(pkey),
296 .offset_words = 10,
297 .offset_bits = 0,
298 .size_bits = 16 },
299 { MCMEMBER_REC_FIELD(rate_selector),
300 .offset_words = 10,
301 .offset_bits = 16,
302 .size_bits = 2 },
303 { MCMEMBER_REC_FIELD(rate),
304 .offset_words = 10,
305 .offset_bits = 18,
306 .size_bits = 6 },
307 { MCMEMBER_REC_FIELD(packet_life_time_selector),
308 .offset_words = 10,
309 .offset_bits = 24,
310 .size_bits = 2 },
311 { MCMEMBER_REC_FIELD(packet_life_time),
312 .offset_words = 10,
313 .offset_bits = 26,
314 .size_bits = 6 },
315 { MCMEMBER_REC_FIELD(sl),
316 .offset_words = 11,
317 .offset_bits = 0,
318 .size_bits = 4 },
319 { MCMEMBER_REC_FIELD(flow_label),
320 .offset_words = 11,
321 .offset_bits = 4,
322 .size_bits = 20 },
323 { MCMEMBER_REC_FIELD(hop_limit),
324 .offset_words = 11,
325 .offset_bits = 24,
326 .size_bits = 8 },
327 { MCMEMBER_REC_FIELD(scope),
328 .offset_words = 12,
329 .offset_bits = 0,
330 .size_bits = 4 },
331 { MCMEMBER_REC_FIELD(join_state),
332 .offset_words = 12,
333 .offset_bits = 4,
334 .size_bits = 4 },
335 { MCMEMBER_REC_FIELD(proxy_join),
336 .offset_words = 12,
337 .offset_bits = 8,
338 .size_bits = 1 },
339 { RESERVED,
340 .offset_words = 12,
341 .offset_bits = 9,
342 .size_bits = 23 },
343};
344
cbae32c5
HR		 345#define SERVICE_REC_FIELD(field) \
346 .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
347 .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
348 .field_name = "sa_service_rec:" #field
349
350static const struct ib_field service_rec_table[] = {
351 { SERVICE_REC_FIELD(id),
352 .offset_words = 0,
353 .offset_bits = 0,
354 .size_bits = 64 },
355 { SERVICE_REC_FIELD(gid),
356 .offset_words = 2,
357 .offset_bits = 0,
358 .size_bits = 128 },
359 { SERVICE_REC_FIELD(pkey),
360 .offset_words = 6,
361 .offset_bits = 0,
362 .size_bits = 16 },
363 { SERVICE_REC_FIELD(lease),
364 .offset_words = 7,
365 .offset_bits = 0,
366 .size_bits = 32 },
367 { SERVICE_REC_FIELD(key),
368 .offset_words = 8,
369 .offset_bits = 0,
370 .size_bits = 128 },
371 { SERVICE_REC_FIELD(name),
372 .offset_words = 12,
373 .offset_bits = 0,
374 .size_bits = 64*8 },
375 { SERVICE_REC_FIELD(data8),
376 .offset_words = 28,
377 .offset_bits = 0,
378 .size_bits = 16*8 },
379 { SERVICE_REC_FIELD(data16),
380 .offset_words = 32,
381 .offset_bits = 0,
382 .size_bits = 8*16 },
383 { SERVICE_REC_FIELD(data32),
384 .offset_words = 36,
385 .offset_bits = 0,
386 .size_bits = 4*32 },
387 { SERVICE_REC_FIELD(data64),
388 .offset_words = 40,
389 .offset_bits = 0,
390 .size_bits = 2*64 },
391};
392
aeab97ed
ES		 393#define GUIDINFO_REC_FIELD(field) \
394 .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \
395 .struct_size_bytes = sizeof((struct ib_sa_guidinfo_rec *) 0)->field, \
396 .field_name = "sa_guidinfo_rec:" #field
397
398static const struct ib_field guidinfo_rec_table[] = {
399 { GUIDINFO_REC_FIELD(lid),
400 .offset_words = 0,
401 .offset_bits = 0,
402 .size_bits = 16 },
403 { GUIDINFO_REC_FIELD(block_num),
404 .offset_words = 0,
405 .offset_bits = 16,
406 .size_bits = 8 },
407 { GUIDINFO_REC_FIELD(res1),
408 .offset_words = 0,
409 .offset_bits = 24,
410 .size_bits = 8 },
411 { GUIDINFO_REC_FIELD(res2),
412 .offset_words = 1,
413 .offset_bits = 0,
414 .size_bits = 32 },
415 { GUIDINFO_REC_FIELD(guid_info_list),
416 .offset_words = 2,
417 .offset_bits = 0,
418 .size_bits = 512 },
419};
420
2ca546b9
KW		 421static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
422{
423 query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
424}
425
426static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
427{
428 return (query->flags & IB_SA_CANCEL);
429}
430
431static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
432 struct ib_sa_query *query)
433{
434 struct ib_sa_path_rec *sa_rec = query->mad_buf->context[1];
435 struct ib_sa_mad *mad = query->mad_buf->mad;
436 ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
437 u16 val16;
438 u64 val64;
439 struct rdma_ls_resolve_header *header;
440
441 query->mad_buf->context[1] = NULL;
442
443 /* Construct the family header first */
444 header = (struct rdma_ls_resolve_header *)
445 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
446 memcpy(header->device_name, query->port->agent->device->name,
447 LS_DEVICE_NAME_MAX);
448 header->port_num = query->port->port_num;
449
450 if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
451 sa_rec->reversible != 0)
452 query->path_use = LS_RESOLVE_PATH_USE_GMP;
453 else
454 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
455 header->path_use = query->path_use;
456
457 /* Now build the attributes */
458 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
459 val64 = be64_to_cpu(sa_rec->service_id);
460 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
461 sizeof(val64), &val64);
462 }
463 if (comp_mask & IB_SA_PATH_REC_DGID)
464 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
465 sizeof(sa_rec->dgid), &sa_rec->dgid);
466 if (comp_mask & IB_SA_PATH_REC_SGID)
467 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
468 sizeof(sa_rec->sgid), &sa_rec->sgid);
469 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
470 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
471 sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
472
473 if (comp_mask & IB_SA_PATH_REC_PKEY) {
474 val16 = be16_to_cpu(sa_rec->pkey);
475 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
476 sizeof(val16), &val16);
477 }
478 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
479 val16 = be16_to_cpu(sa_rec->qos_class);
480 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
481 sizeof(val16), &val16);
482 }
483}
484
485static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
486{
487 int len = 0;
488
489 if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
490 len += nla_total_size(sizeof(u64));
491 if (comp_mask & IB_SA_PATH_REC_DGID)
492 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
493 if (comp_mask & IB_SA_PATH_REC_SGID)
494 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
495 if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
496 len += nla_total_size(sizeof(u8));
497 if (comp_mask & IB_SA_PATH_REC_PKEY)
498 len += nla_total_size(sizeof(u16));
499 if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
500 len += nla_total_size(sizeof(u16));
501
502 /*
503 * Make sure that at least some of the required comp_mask bits are
504 * set.
505 */
506 if (WARN_ON(len == 0))
507 return len;
508
509 /* Add the family header */
510 len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
511
512 return len;
513}
514
515static int ib_nl_send_msg(struct ib_sa_query *query)
516{
517 struct sk_buff *skb = NULL;
518 struct nlmsghdr *nlh;
519 void *data;
520 int ret = 0;
521 struct ib_sa_mad *mad;
522 int len;
523
524 mad = query->mad_buf->mad;
525 len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
526 if (len <= 0)
527 return -EMSGSIZE;
528
529 skb = nlmsg_new(len, GFP_KERNEL);
530 if (!skb)
531 return -ENOMEM;
532
533 /* Put nlmsg header only for now */
534 data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
ba13b5f8 535 RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
2ca546b9
KW		 536 if (!data) {
537 kfree_skb(skb);
538 return -EMSGSIZE;
539 }
540
541 /* Add attributes */
542 ib_nl_set_path_rec_attrs(skb, query);
543
544 /* Repair the nlmsg header length */
545 nlmsg_end(skb, nlh);
546
547 ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, GFP_KERNEL);
548 if (!ret)
549 ret = len;
550 else
551 ret = 0;
552
553 return ret;
554}
555
556static int ib_nl_make_request(struct ib_sa_query *query)
557{
558 unsigned long flags;
559 unsigned long delay;
560 int ret;
561
562 INIT_LIST_HEAD(&query->list);
563 query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
564
565 spin_lock_irqsave(&ib_nl_request_lock, flags);
566 ret = ib_nl_send_msg(query);
567 if (ret <= 0) {
568 ret = -EIO;
569 goto request_out;
570 } else {
571 ret = 0;
572 }
573
574 delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
575 query->timeout = delay + jiffies;
576 list_add_tail(&query->list, &ib_nl_request_list);
577 /* Start the timeout if this is the only request */
578 if (ib_nl_request_list.next == &query->list)
579 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
580
581request_out:
582 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
583
584 return ret;
585}
586
587static int ib_nl_cancel_request(struct ib_sa_query *query)
588{
589 unsigned long flags;
590 struct ib_sa_query *wait_query;
591 int found = 0;
592
593 spin_lock_irqsave(&ib_nl_request_lock, flags);
594 list_for_each_entry(wait_query, &ib_nl_request_list, list) {
595 /* Let the timeout to take care of the callback */
596 if (query == wait_query) {
597 query->flags |= IB_SA_CANCEL;
598 query->timeout = jiffies;
599 list_move(&query->list, &ib_nl_request_list);
600 found = 1;
601 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
602 break;
603 }
604 }
605 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
606
607 return found;
608}
609
610static void send_handler(struct ib_mad_agent *agent,
611 struct ib_mad_send_wc *mad_send_wc);
612
613static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
614 const struct nlmsghdr *nlh)
615{
616 struct ib_mad_send_wc mad_send_wc;
617 struct ib_sa_mad *mad = NULL;
618 const struct nlattr *head, *curr;
619 struct ib_path_rec_data *rec;
620 int len, rem;
621 u32 mask = 0;
622 int status = -EIO;
623
624 if (query->callback) {
625 head = (const struct nlattr *) nlmsg_data(nlh);
626 len = nlmsg_len(nlh);
627 switch (query->path_use) {
628 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
629 mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
630 break;
631
632 case LS_RESOLVE_PATH_USE_ALL:
633 case LS_RESOLVE_PATH_USE_GMP:
634 default:
635 mask = IB_PATH_PRIMARY | IB_PATH_GMP |
636 IB_PATH_BIDIRECTIONAL;
637 break;
638 }
639 nla_for_each_attr(curr, head, len, rem) {
640 if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
641 rec = nla_data(curr);
642 /*
643 * Get the first one. In the future, we may
644 * need to get up to 6 pathrecords.
645 */
646 if ((rec->flags & mask) == mask) {
647 mad = query->mad_buf->mad;
648 mad->mad_hdr.method |=
649 IB_MGMT_METHOD_RESP;
650 memcpy(mad->data, rec->path_rec,
651 sizeof(rec->path_rec));
652 status = 0;
653 break;
654 }
655 }
656 }
657 query->callback(query, status, mad);
658 }
659
660 mad_send_wc.send_buf = query->mad_buf;
661 mad_send_wc.status = IB_WC_SUCCESS;
662 send_handler(query->mad_buf->mad_agent, &mad_send_wc);
663}
664
665static void ib_nl_request_timeout(struct work_struct *work)
666{
667 unsigned long flags;
668 struct ib_sa_query *query;
669 unsigned long delay;
670 struct ib_mad_send_wc mad_send_wc;
671 int ret;
672
673 spin_lock_irqsave(&ib_nl_request_lock, flags);
674 while (!list_empty(&ib_nl_request_list)) {
675 query = list_entry(ib_nl_request_list.next,
676 struct ib_sa_query, list);
677
678 if (time_after(query->timeout, jiffies)) {
679 delay = query->timeout - jiffies;
680 if ((long)delay <= 0)
681 delay = 1;
682 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
683 break;
684 }
685
686 list_del(&query->list);
687 ib_sa_disable_local_svc(query);
688 /* Hold the lock to protect against query cancellation */
689 if (ib_sa_query_cancelled(query))
690 ret = -1;
691 else
692 ret = ib_post_send_mad(query->mad_buf, NULL);
693 if (ret) {
694 mad_send_wc.send_buf = query->mad_buf;
695 mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
696 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
697 send_handler(query->port->agent, &mad_send_wc);
698 spin_lock_irqsave(&ib_nl_request_lock, flags);
699 }
700 }
701 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
702}
703
704static int ib_nl_handle_set_timeout(struct sk_buff *skb,
705 struct netlink_callback *cb)
706{
707 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
708 int timeout, delta, abs_delta;
709 const struct nlattr *attr;
710 unsigned long flags;
711 struct ib_sa_query *query;
712 long delay = 0;
713 struct nlattr *tb[LS_NLA_TYPE_MAX];
714 int ret;
715
716 if (!netlink_capable(skb, CAP_NET_ADMIN))
717 return -EPERM;
718
719 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
720 nlmsg_len(nlh), ib_nl_policy);
721 attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
722 if (ret || !attr)
723 goto settimeout_out;
724
725 timeout = *(int *) nla_data(attr);
726 if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
727 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
728 if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
729 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
730
731 delta = timeout - sa_local_svc_timeout_ms;
732 if (delta < 0)
733 abs_delta = -delta;
734 else
735 abs_delta = delta;
736
737 if (delta != 0) {
738 spin_lock_irqsave(&ib_nl_request_lock, flags);
739 sa_local_svc_timeout_ms = timeout;
740 list_for_each_entry(query, &ib_nl_request_list, list) {
741 if (delta < 0 && abs_delta > query->timeout)
742 query->timeout = 0;
743 else
744 query->timeout += delta;
745
746 /* Get the new delay from the first entry */
747 if (!delay) {
748 delay = query->timeout - jiffies;
749 if (delay <= 0)
750 delay = 1;
751 }
752 }
753 if (delay)
754 mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
755 (unsigned long)delay);
756 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
757 }
758
759settimeout_out:
760 return skb->len;
761}
762
763static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
764{
765 struct nlattr *tb[LS_NLA_TYPE_MAX];
766 int ret;
767
768 if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
769 return 0;
770
771 ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
772 nlmsg_len(nlh), ib_nl_policy);
773 if (ret)
774 return 0;
775
776 return 1;
777}
778
779static int ib_nl_handle_resolve_resp(struct sk_buff *skb,
780 struct netlink_callback *cb)
781{
782 const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
783 unsigned long flags;
784 struct ib_sa_query *query;
785 struct ib_mad_send_buf *send_buf;
786 struct ib_mad_send_wc mad_send_wc;
787 int found = 0;
788 int ret;
789
790 if (!netlink_capable(skb, CAP_NET_ADMIN))
791 return -EPERM;
792
793 spin_lock_irqsave(&ib_nl_request_lock, flags);
794 list_for_each_entry(query, &ib_nl_request_list, list) {
795 /*
796 * If the query is cancelled, let the timeout routine
797 * take care of it.
798 */
799 if (nlh->nlmsg_seq == query->seq) {
800 found = !ib_sa_query_cancelled(query);
801 if (found)
802 list_del(&query->list);
803 break;
804 }
805 }
806
807 if (!found) {
808 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
809 goto resp_out;
810 }
811
812 send_buf = query->mad_buf;
813
814 if (!ib_nl_is_good_resolve_resp(nlh)) {
815 /* if the result is a failure, send out the packet via IB */
816 ib_sa_disable_local_svc(query);
817 ret = ib_post_send_mad(query->mad_buf, NULL);
818 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
819 if (ret) {
820 mad_send_wc.send_buf = send_buf;
821 mad_send_wc.status = IB_WC_GENERAL_ERR;
822 send_handler(query->port->agent, &mad_send_wc);
823 }
824 } else {
825 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
826 ib_nl_process_good_resolve_rsp(query, nlh);
827 }
828
829resp_out:
830 return skb->len;
831}
832
833static struct ibnl_client_cbs ib_sa_cb_table[] = {
834 [RDMA_NL_LS_OP_RESOLVE] = {
835 .dump = ib_nl_handle_resolve_resp,
836 .module = THIS_MODULE },
837 [RDMA_NL_LS_OP_SET_TIMEOUT] = {
838 .dump = ib_nl_handle_set_timeout,
839 .module = THIS_MODULE },
840};
841
1da177e4
LT		 842static void free_sm_ah(struct kref *kref)
843{
844 struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
845
846 ib_destroy_ah(sm_ah->ah);
847 kfree(sm_ah);
848}
849
c4028958 850static void update_sm_ah(struct work_struct *work)
1da177e4 851{
c4028958
DH		 852 struct ib_sa_port *port =
853 container_of(work, struct ib_sa_port, update_task);
164ba089 854 struct ib_sa_sm_ah *new_ah;
1da177e4
LT		 855 struct ib_port_attr port_attr;
856 struct ib_ah_attr ah_attr;
857
858 if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
859 printk(KERN_WARNING "Couldn't query port\n");
860 return;
861 }
862
863 new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
864 if (!new_ah) {
865 printk(KERN_WARNING "Couldn't allocate new SM AH\n");
866 return;
867 }
868
869 kref_init(&new_ah->ref);
d0e7bb14 870 new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
1da177e4 871
2aec5c60
SH		 872 new_ah->pkey_index = 0;
873 if (ib_find_pkey(port->agent->device, port->port_num,
53998910 874 IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2aec5c60
SH		 875 printk(KERN_ERR "Couldn't find index for default PKey\n");
876
1da177e4
LT		 877 memset(&ah_attr, 0, sizeof ah_attr);
878 ah_attr.dlid = port_attr.sm_lid;
879 ah_attr.sl = port_attr.sm_sl;
880 ah_attr.port_num = port->port_num;
881
882 new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
883 if (IS_ERR(new_ah->ah)) {
884 printk(KERN_WARNING "Couldn't create new SM AH\n");
885 kfree(new_ah);
886 return;
887 }
888
889 spin_lock_irq(&port->ah_lock);
6b708b3d
JM		 890 if (port->sm_ah)
891 kref_put(&port->sm_ah->ref, free_sm_ah);
1da177e4
LT		 892 port->sm_ah = new_ah;
893 spin_unlock_irq(&port->ah_lock);
894
1da177e4
LT		 895}
896
897static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
898{
899 if (event->event == IB_EVENT_PORT_ERR ||
900 event->event == IB_EVENT_PORT_ACTIVE ||
901 event->event == IB_EVENT_LID_CHANGE ||
902 event->event == IB_EVENT_PKEY_CHANGE ||
acaea9ee
JM		 903 event->event == IB_EVENT_SM_CHANGE ||
904 event->event == IB_EVENT_CLIENT_REREGISTER) {
164ba089
MS		 905 unsigned long flags;
906 struct ib_sa_device *sa_dev =
907 container_of(handler, typeof(*sa_dev), event_handler);
908 struct ib_sa_port *port =
909 &sa_dev->port[event->element.port_num - sa_dev->start_port];
910
9247a8eb 911 if (!rdma_cap_ib_sa(handler->device, port->port_num))
fac70d51
EC		 912 return;
913
164ba089
MS		 914 spin_lock_irqsave(&port->ah_lock, flags);
915 if (port->sm_ah)
916 kref_put(&port->sm_ah->ref, free_sm_ah);
917 port->sm_ah = NULL;
918 spin_unlock_irqrestore(&port->ah_lock, flags);
1da177e4 919
f0626710 920 queue_work(ib_wq, &sa_dev->port[event->element.port_num -
1da177e4
LT		 921 sa_dev->start_port].update_task);
922 }
923}
924
c1a0b23b
MT		 925void ib_sa_register_client(struct ib_sa_client *client)
926{
927 atomic_set(&client->users, 1);
928 init_completion(&client->comp);
929}
930EXPORT_SYMBOL(ib_sa_register_client);
931
c1a0b23b
MT		 932void ib_sa_unregister_client(struct ib_sa_client *client)
933{
934 ib_sa_client_put(client);
935 wait_for_completion(&client->comp);
936}
937EXPORT_SYMBOL(ib_sa_unregister_client);
938
1da177e4
LT		 939/**
940 * ib_sa_cancel_query - try to cancel an SA query
941 * @id:ID of query to cancel
942 * @query:query pointer to cancel
943 *
944 * Try to cancel an SA query. If the id and query don't match up or
945 * the query has already completed, nothing is done. Otherwise the
946 * query is canceled and will complete with a status of -EINTR.
947 */
948void ib_sa_cancel_query(int id, struct ib_sa_query *query)
949{
950 unsigned long flags;
951 struct ib_mad_agent *agent;
34816ad9 952 struct ib_mad_send_buf *mad_buf;
1da177e4
LT		 953
954 spin_lock_irqsave(&idr_lock, flags);
955 if (idr_find(&query_idr, id) != query) {
956 spin_unlock_irqrestore(&idr_lock, flags);
957 return;
958 }
959 agent = query->port->agent;
34816ad9 960 mad_buf = query->mad_buf;
1da177e4
LT		 961 spin_unlock_irqrestore(&idr_lock, flags);
962
2ca546b9
KW		 963 /*
964 * If the query is still on the netlink request list, schedule
965 * it to be cancelled by the timeout routine. Otherwise, it has been
966 * sent to the MAD layer and has to be cancelled from there.
967 */
968 if (!ib_nl_cancel_request(query))
969 ib_cancel_mad(agent, mad_buf);
1da177e4
LT		 970}
971EXPORT_SYMBOL(ib_sa_cancel_query);
972
d0e7bb14
SH		 973static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
974{
975 struct ib_sa_device *sa_dev;
976 struct ib_sa_port *port;
977 unsigned long flags;
978 u8 src_path_mask;
979
980 sa_dev = ib_get_client_data(device, &sa_client);
981 if (!sa_dev)
982 return 0x7f;
983
984 port = &sa_dev->port[port_num - sa_dev->start_port];
985 spin_lock_irqsave(&port->ah_lock, flags);
986 src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
987 spin_unlock_irqrestore(&port->ah_lock, flags);
988
989 return src_path_mask;
990}
991
6d969a47
SH		 992int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
993 struct ib_sa_path_rec *rec, struct ib_ah_attr *ah_attr)
994{
995 int ret;
996 u16 gid_index;
3c86aa70 997 int force_grh;
6d969a47
SH		 998
999 memset(ah_attr, 0, sizeof *ah_attr);
1000 ah_attr->dlid = be16_to_cpu(rec->dlid);
1001 ah_attr->sl = rec->sl;
d0e7bb14
SH		 1002 ah_attr->src_path_bits = be16_to_cpu(rec->slid) &
1003 get_src_path_mask(device, port_num);
6d969a47 1004 ah_attr->port_num = port_num;
7084f842 1005 ah_attr->static_rate = rec->rate;
6d969a47 1006
227128fc 1007 force_grh = rdma_cap_eth_ah(device, port_num);
3c86aa70
EC		 1008
1009 if (rec->hop_limit > 1 || force_grh) {
6d969a47
SH		 1010 ah_attr->ah_flags = IB_AH_GRH;
1011 ah_attr->grh.dgid = rec->dgid;
1012
55ee3ab2 1013 ret = ib_find_cached_gid(device, &rec->sgid, NULL, &port_num,
6d969a47
SH		 1014 &gid_index);
1015 if (ret)
1016 return ret;
1017
ca222c6b
SH		 1018 ah_attr->grh.sgid_index = gid_index;
1019 ah_attr->grh.flow_label = be32_to_cpu(rec->flow_label);
1020 ah_attr->grh.hop_limit = rec->hop_limit;
6d969a47
SH		 1021 ah_attr->grh.traffic_class = rec->traffic_class;
1022 }
dd5f03be
MB		 1023 if (force_grh) {
1024 memcpy(ah_attr->dmac, rec->dmac, ETH_ALEN);
1025 ah_attr->vlan_id = rec->vlan_id;
1026 } else {
1027 ah_attr->vlan_id = 0xffff;
1028 }
1029
6d969a47
SH		 1030 return 0;
1031}
1032EXPORT_SYMBOL(ib_init_ah_from_path);
1033
2aec5c60
SH		 1034static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1035{
1036 unsigned long flags;
1037
1038 spin_lock_irqsave(&query->port->ah_lock, flags);
164ba089
MS		 1039 if (!query->port->sm_ah) {
1040 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1041 return -EAGAIN;
1042 }
2aec5c60
SH		 1043 kref_get(&query->port->sm_ah->ref);
1044 query->sm_ah = query->port->sm_ah;
1045 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1046
1047 query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1048 query->sm_ah->pkey_index,
1049 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
da2dfaa3
IW		 1050 gfp_mask,
1051 IB_MGMT_BASE_VERSION);
3c10c7c9 1052 if (IS_ERR(query->mad_buf)) {
2aec5c60
SH		 1053 kref_put(&query->sm_ah->ref, free_sm_ah);
1054 return -ENOMEM;
1055 }
1056
1057 query->mad_buf->ah = query->sm_ah->ah;
1058
1059 return 0;
1060}
1061
1062static void free_mad(struct ib_sa_query *query)
1063{
1064 ib_free_send_mad(query->mad_buf);
1065 kref_put(&query->sm_ah->ref, free_sm_ah);
1066}
1067
1da177e4
LT		 1068static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
1069{
1070 unsigned long flags;
1071
1072 memset(mad, 0, sizeof *mad);
1073
1074 mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
1075 mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
1076 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1077
1078 spin_lock_irqsave(&tid_lock, flags);
1079 mad->mad_hdr.tid =
1080 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1081 spin_unlock_irqrestore(&tid_lock, flags);
1082}
1083
e322fedf 1084static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1da177e4 1085{
5343c00d 1086 bool preload = !!(gfp_mask & __GFP_WAIT);
1da177e4 1087 unsigned long flags;
34816ad9 1088 int ret, id;
1da177e4 1089
3b069c5d
TH		 1090 if (preload)
1091 idr_preload(gfp_mask);
1da177e4 1092 spin_lock_irqsave(&idr_lock, flags);
3b069c5d
TH		 1093
1094 id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1095
1da177e4 1096 spin_unlock_irqrestore(&idr_lock, flags);
3b069c5d
TH		 1097 if (preload)
1098 idr_preload_end();
1099 if (id < 0)
1100 return id;
1da177e4 1101
34816ad9
SH		 1102 query->mad_buf->timeout_ms = timeout_ms;
1103 query->mad_buf->context[0] = query;
1104 query->id = id;
1da177e4 1105
2ca546b9
KW		 1106 if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
1107 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1108 if (!ib_nl_make_request(query))
1109 return id;
1110 }
1111 ib_sa_disable_local_svc(query);
1112 }
1113
34816ad9 1114 ret = ib_post_send_mad(query->mad_buf, NULL);
1da177e4 1115 if (ret) {
1da177e4 1116 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1117 idr_remove(&query_idr, id);
1da177e4
LT		 1118 spin_unlock_irqrestore(&idr_lock, flags);
1119 }
1120
dae4c1d2
RD		 1121 /*
1122 * It's not safe to dereference query any more, because the
1123 * send may already have completed and freed the query in
34816ad9 1124 * another context.
dae4c1d2 1125 */
34816ad9 1126 return ret ? ret : id;
1da177e4
LT		 1127}
1128
a7ca1f00
SH		 1129void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec)
1130{
1131 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1132}
1133EXPORT_SYMBOL(ib_sa_unpack_path);
1134
2e08b587
SH		 1135void ib_sa_pack_path(struct ib_sa_path_rec *rec, void *attribute)
1136{
1137 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1138}
1139EXPORT_SYMBOL(ib_sa_pack_path);
1140
1da177e4
LT		 1141static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1142 int status,
1143 struct ib_sa_mad *mad)
1144{
1145 struct ib_sa_path_query *query =
1146 container_of(sa_query, struct ib_sa_path_query, sa_query);
1147
1148 if (mad) {
1149 struct ib_sa_path_rec rec;
1150
1151 ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
1152 mad->data, &rec);
dd5f03be
MB		 1153 rec.vlan_id = 0xffff;
1154 memset(rec.dmac, 0, ETH_ALEN);
1155 memset(rec.smac, 0, ETH_ALEN);
1da177e4
LT		 1156 query->callback(status, &rec, query->context);
1157 } else
1158 query->callback(status, NULL, query->context);
1159}
1160
1161static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1162{
1da177e4
LT		 1163 kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
1164}
1165
1166/**
1167 * ib_sa_path_rec_get - Start a Path get query
c1a0b23b 1168 * @client:SA client
1da177e4
LT		 1169 * @device:device to send query on
1170 * @port_num: port number to send query on
1171 * @rec:Path Record to send in query
1172 * @comp_mask:component mask to send in query
1173 * @timeout_ms:time to wait for response
1174 * @gfp_mask:GFP mask to use for internal allocations
1175 * @callback:function called when query completes, times out or is
1176 * canceled
1177 * @context:opaque user context passed to callback
1178 * @sa_query:query context, used to cancel query
1179 *
1180 * Send a Path Record Get query to the SA to look up a path. The
1181 * callback function will be called when the query completes (or
1182 * fails); status is 0 for a successful response, -EINTR if the query
1183 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1184 * occurred sending the query. The resp parameter of the callback is
1185 * only valid if status is 0.
1186 *
1187 * If the return value of ib_sa_path_rec_get() is negative, it is an
1188 * error code. Otherwise it is a query ID that can be used to cancel
1189 * the query.
1190 */
c1a0b23b
MT		 1191int ib_sa_path_rec_get(struct ib_sa_client *client,
1192 struct ib_device *device, u8 port_num,
1da177e4
LT		 1193 struct ib_sa_path_rec *rec,
1194 ib_sa_comp_mask comp_mask,
dd0fc66f 1195 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1196 void (*callback)(int status,
1197 struct ib_sa_path_rec *resp,
1198 void *context),
1199 void *context,
1200 struct ib_sa_query **sa_query)
1201{
1202 struct ib_sa_path_query *query;
1203 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1204 struct ib_sa_port *port;
1205 struct ib_mad_agent *agent;
34816ad9 1206 struct ib_sa_mad *mad;
1da177e4
LT		 1207 int ret;
1208
56c202d6
RD		 1209 if (!sa_dev)
1210 return -ENODEV;
1211
1212 port = &sa_dev->port[port_num - sa_dev->start_port];
1213 agent = port->agent;
1214
5d265770 1215 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1216 if (!query)
1217 return -ENOMEM;
34816ad9 1218
2aec5c60
SH		 1219 query->sa_query.port = port;
1220 ret = alloc_mad(&query->sa_query, gfp_mask);
1221 if (ret)
34816ad9 1222 goto err1;
1da177e4 1223
c1a0b23b
MT		 1224 ib_sa_client_get(client);
1225 query->sa_query.client = client;
1226 query->callback = callback;
1227 query->context = context;
1da177e4 1228
34816ad9
SH		 1229 mad = query->sa_query.mad_buf->mad;
1230 init_mad(mad, agent);
1da177e4 1231
34816ad9
SH		 1232 query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1233 query->sa_query.release = ib_sa_path_rec_release;
34816ad9
SH		 1234 mad->mad_hdr.method = IB_MGMT_METHOD_GET;
1235 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1236 mad->sa_hdr.comp_mask = comp_mask;
1da177e4 1237
34816ad9 1238 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, mad->data);
1da177e4
LT		 1239
1240 *sa_query = &query->sa_query;
dae4c1d2 1241
2ca546b9
KW		 1242 query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1243 query->sa_query.mad_buf->context[1] = rec;
1244
e322fedf 1245 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1246 if (ret < 0)
1247 goto err2;
1248
1249 return ret;
1250
1251err2:
1252 *sa_query = NULL;
c1a0b23b 1253 ib_sa_client_put(query->sa_query.client);
2aec5c60 1254 free_mad(&query->sa_query);
1da177e4 1255
34816ad9
SH		 1256err1:
1257 kfree(query);
dae4c1d2 1258 return ret;
1da177e4
LT		 1259}
1260EXPORT_SYMBOL(ib_sa_path_rec_get);
1261
cbae32c5
HR		 1262static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1263 int status,
1264 struct ib_sa_mad *mad)
1265{
1266 struct ib_sa_service_query *query =
1267 container_of(sa_query, struct ib_sa_service_query, sa_query);
1268
1269 if (mad) {
1270 struct ib_sa_service_rec rec;
1271
1272 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1273 mad->data, &rec);
1274 query->callback(status, &rec, query->context);
1275 } else
1276 query->callback(status, NULL, query->context);
1277}
1278
1279static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1280{
cbae32c5
HR		 1281 kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1282}
1283
1284/**
1285 * ib_sa_service_rec_query - Start Service Record operation
c1a0b23b 1286 * @client:SA client
cbae32c5
HR		 1287 * @device:device to send request on
1288 * @port_num: port number to send request on
1289 * @method:SA method - should be get, set, or delete
1290 * @rec:Service Record to send in request
1291 * @comp_mask:component mask to send in request
1292 * @timeout_ms:time to wait for response
1293 * @gfp_mask:GFP mask to use for internal allocations
1294 * @callback:function called when request completes, times out or is
1295 * canceled
1296 * @context:opaque user context passed to callback
1297 * @sa_query:request context, used to cancel request
1298 *
1299 * Send a Service Record set/get/delete to the SA to register,
1300 * unregister or query a service record.
1301 * The callback function will be called when the request completes (or
1302 * fails); status is 0 for a successful response, -EINTR if the query
1303 * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1304 * occurred sending the query. The resp parameter of the callback is
1305 * only valid if status is 0.
1306 *
1307 * If the return value of ib_sa_service_rec_query() is negative, it is an
1308 * error code. Otherwise it is a request ID that can be used to cancel
1309 * the query.
1310 */
c1a0b23b
MT		 1311int ib_sa_service_rec_query(struct ib_sa_client *client,
1312 struct ib_device *device, u8 port_num, u8 method,
cbae32c5
HR		 1313 struct ib_sa_service_rec *rec,
1314 ib_sa_comp_mask comp_mask,
dd0fc66f 1315 int timeout_ms, gfp_t gfp_mask,
cbae32c5
HR		 1316 void (*callback)(int status,
1317 struct ib_sa_service_rec *resp,
1318 void *context),
1319 void *context,
1320 struct ib_sa_query **sa_query)
1321{
1322 struct ib_sa_service_query *query;
1323 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1324 struct ib_sa_port *port;
1325 struct ib_mad_agent *agent;
34816ad9 1326 struct ib_sa_mad *mad;
cbae32c5
HR		 1327 int ret;
1328
56c202d6
RD		 1329 if (!sa_dev)
1330 return -ENODEV;
1331
1332 port = &sa_dev->port[port_num - sa_dev->start_port];
1333 agent = port->agent;
1334
cbae32c5
HR		 1335 if (method != IB_MGMT_METHOD_GET &&
1336 method != IB_MGMT_METHOD_SET &&
1337 method != IB_SA_METHOD_DELETE)
1338 return -EINVAL;
1339
5d265770 1340 query = kzalloc(sizeof(*query), gfp_mask);
cbae32c5
HR		 1341 if (!query)
1342 return -ENOMEM;
34816ad9 1343
2aec5c60
SH		 1344 query->sa_query.port = port;
1345 ret = alloc_mad(&query->sa_query, gfp_mask);
1346 if (ret)
34816ad9 1347 goto err1;
cbae32c5 1348
c1a0b23b
MT		 1349 ib_sa_client_get(client);
1350 query->sa_query.client = client;
1351 query->callback = callback;
1352 query->context = context;
cbae32c5 1353
34816ad9
SH		 1354 mad = query->sa_query.mad_buf->mad;
1355 init_mad(mad, agent);
cbae32c5 1356
34816ad9
SH		 1357 query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1358 query->sa_query.release = ib_sa_service_rec_release;
34816ad9
SH		 1359 mad->mad_hdr.method = method;
1360 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1361 mad->sa_hdr.comp_mask = comp_mask;
cbae32c5
HR		 1362
1363 ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
34816ad9 1364 rec, mad->data);
cbae32c5
HR		 1365
1366 *sa_query = &query->sa_query;
1367
e322fedf 1368 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1369 if (ret < 0)
1370 goto err2;
1371
1372 return ret;
cbae32c5 1373
34816ad9
SH		 1374err2:
1375 *sa_query = NULL;
c1a0b23b 1376 ib_sa_client_put(query->sa_query.client);
2aec5c60 1377 free_mad(&query->sa_query);
34816ad9
SH		 1378
1379err1:
1380 kfree(query);
cbae32c5
HR		 1381 return ret;
1382}
1383EXPORT_SYMBOL(ib_sa_service_rec_query);
1384
1da177e4
LT		 1385static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1386 int status,
1387 struct ib_sa_mad *mad)
1388{
1389 struct ib_sa_mcmember_query *query =
1390 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1391
1392 if (mad) {
1393 struct ib_sa_mcmember_rec rec;
1394
1395 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1396 mad->data, &rec);
1397 query->callback(status, &rec, query->context);
1398 } else
1399 query->callback(status, NULL, query->context);
1400}
1401
1402static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1403{
1da177e4
LT		 1404 kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1405}
1406
c1a0b23b
MT		 1407int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1408 struct ib_device *device, u8 port_num,
1da177e4
LT		 1409 u8 method,
1410 struct ib_sa_mcmember_rec *rec,
1411 ib_sa_comp_mask comp_mask,
dd0fc66f 1412 int timeout_ms, gfp_t gfp_mask,
1da177e4
LT		 1413 void (*callback)(int status,
1414 struct ib_sa_mcmember_rec *resp,
1415 void *context),
1416 void *context,
1417 struct ib_sa_query **sa_query)
1418{
1419 struct ib_sa_mcmember_query *query;
1420 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
56c202d6
RD		 1421 struct ib_sa_port *port;
1422 struct ib_mad_agent *agent;
34816ad9 1423 struct ib_sa_mad *mad;
1da177e4
LT		 1424 int ret;
1425
56c202d6
RD		 1426 if (!sa_dev)
1427 return -ENODEV;
1428
1429 port = &sa_dev->port[port_num - sa_dev->start_port];
1430 agent = port->agent;
1431
5d265770 1432 query = kzalloc(sizeof(*query), gfp_mask);
1da177e4
LT		 1433 if (!query)
1434 return -ENOMEM;
34816ad9 1435
2aec5c60
SH		 1436 query->sa_query.port = port;
1437 ret = alloc_mad(&query->sa_query, gfp_mask);
1438 if (ret)
34816ad9 1439 goto err1;
1da177e4 1440
c1a0b23b
MT		 1441 ib_sa_client_get(client);
1442 query->sa_query.client = client;
1443 query->callback = callback;
1444 query->context = context;
1da177e4 1445
34816ad9
SH		 1446 mad = query->sa_query.mad_buf->mad;
1447 init_mad(mad, agent);
1da177e4 1448
34816ad9
SH		 1449 query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1450 query->sa_query.release = ib_sa_mcmember_rec_release;
34816ad9
SH		 1451 mad->mad_hdr.method = method;
1452 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1453 mad->sa_hdr.comp_mask = comp_mask;
1da177e4
LT		 1454
1455 ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
34816ad9 1456 rec, mad->data);
1da177e4
LT		 1457
1458 *sa_query = &query->sa_query;
dae4c1d2 1459
e322fedf 1460 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
34816ad9
SH		 1461 if (ret < 0)
1462 goto err2;
1da177e4 1463
dae4c1d2 1464 return ret;
34816ad9
SH		 1465
1466err2:
1467 *sa_query = NULL;
c1a0b23b 1468 ib_sa_client_put(query->sa_query.client);
2aec5c60 1469 free_mad(&query->sa_query);
34816ad9
SH		 1470
1471err1:
1472 kfree(query);
1473 return ret;
1da177e4 1474}
1da177e4 1475
aeab97ed
ES		 1476/* Support GuidInfoRecord */
1477static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1478 int status,
1479 struct ib_sa_mad *mad)
1480{
1481 struct ib_sa_guidinfo_query *query =
1482 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1483
1484 if (mad) {
1485 struct ib_sa_guidinfo_rec rec;
1486
1487 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1488 mad->data, &rec);
1489 query->callback(status, &rec, query->context);
1490 } else
1491 query->callback(status, NULL, query->context);
1492}
1493
1494static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1495{
1496 kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1497}
1498
1499int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1500 struct ib_device *device, u8 port_num,
1501 struct ib_sa_guidinfo_rec *rec,
1502 ib_sa_comp_mask comp_mask, u8 method,
1503 int timeout_ms, gfp_t gfp_mask,
1504 void (*callback)(int status,
1505 struct ib_sa_guidinfo_rec *resp,
1506 void *context),
1507 void *context,
1508 struct ib_sa_query **sa_query)
1509{
1510 struct ib_sa_guidinfo_query *query;
1511 struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1512 struct ib_sa_port *port;
1513 struct ib_mad_agent *agent;
1514 struct ib_sa_mad *mad;
1515 int ret;
1516
1517 if (!sa_dev)
1518 return -ENODEV;
1519
1520 if (method != IB_MGMT_METHOD_GET &&
1521 method != IB_MGMT_METHOD_SET &&
1522 method != IB_SA_METHOD_DELETE) {
1523 return -EINVAL;
1524 }
1525
1526 port = &sa_dev->port[port_num - sa_dev->start_port];
1527 agent = port->agent;
1528
5d265770 1529 query = kzalloc(sizeof(*query), gfp_mask);
aeab97ed
ES		 1530 if (!query)
1531 return -ENOMEM;
1532
1533 query->sa_query.port = port;
1534 ret = alloc_mad(&query->sa_query, gfp_mask);
1535 if (ret)
1536 goto err1;
1537
1538 ib_sa_client_get(client);
1539 query->sa_query.client = client;
1540 query->callback = callback;
1541 query->context = context;
1542
1543 mad = query->sa_query.mad_buf->mad;
1544 init_mad(mad, agent);
1545
1546 query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1547 query->sa_query.release = ib_sa_guidinfo_rec_release;
1548
1549 mad->mad_hdr.method = method;
1550 mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1551 mad->sa_hdr.comp_mask = comp_mask;
1552
1553 ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1554 mad->data);
1555
1556 *sa_query = &query->sa_query;
1557
1558 ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1559 if (ret < 0)
1560 goto err2;
1561
1562 return ret;
1563
1564err2:
1565 *sa_query = NULL;
1566 ib_sa_client_put(query->sa_query.client);
1567 free_mad(&query->sa_query);
1568
1569err1:
1570 kfree(query);
1571 return ret;
1572}
1573EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1574
1da177e4
LT		 1575static void send_handler(struct ib_mad_agent *agent,
1576 struct ib_mad_send_wc *mad_send_wc)
1577{
34816ad9 1578 struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
1da177e4
LT		 1579 unsigned long flags;
1580
e4f50f00
RD		 1581 if (query->callback)
1582 switch (mad_send_wc->status) {
1583 case IB_WC_SUCCESS:
1584 /* No callback -- already got recv */
1585 break;
1586 case IB_WC_RESP_TIMEOUT_ERR:
1587 query->callback(query, -ETIMEDOUT, NULL);
1588 break;
1589 case IB_WC_WR_FLUSH_ERR:
1590 query->callback(query, -EINTR, NULL);
1591 break;
1592 default:
1593 query->callback(query, -EIO, NULL);
1594 break;
1595 }
1da177e4 1596
1da177e4 1597 spin_lock_irqsave(&idr_lock, flags);
34816ad9 1598 idr_remove(&query_idr, query->id);
1da177e4 1599 spin_unlock_irqrestore(&idr_lock, flags);
34816ad9 1600
2aec5c60 1601 free_mad(query);
c1a0b23b 1602 ib_sa_client_put(query->client);
34816ad9 1603 query->release(query);
1da177e4
LT		 1604}
1605
1606static void recv_handler(struct ib_mad_agent *mad_agent,
1607 struct ib_mad_recv_wc *mad_recv_wc)
1608{
1609 struct ib_sa_query *query;
34816ad9 1610 struct ib_mad_send_buf *mad_buf;
1da177e4 1611
34816ad9
SH		 1612 mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
1613 query = mad_buf->context[0];
1da177e4 1614
34816ad9 1615 if (query->callback) {
1da177e4
LT		 1616 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
1617 query->callback(query,
1618 mad_recv_wc->recv_buf.mad->mad_hdr.status ?
1619 -EINVAL : 0,
1620 (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
1621 else
1622 query->callback(query, -EIO, NULL);
1623 }
1624
1625 ib_free_recv_mad(mad_recv_wc);
1626}
1627
1628static void ib_sa_add_one(struct ib_device *device)
1629{
1630 struct ib_sa_device *sa_dev;
1631 int s, e, i;
08e3681a 1632 int count = 0;
07ebafba 1633
4139032b
HR		 1634 s = rdma_start_port(device);
1635 e = rdma_end_port(device);
1da177e4 1636
fac70d51 1637 sa_dev = kzalloc(sizeof *sa_dev +
1da177e4
LT		 1638 (e - s + 1) * sizeof (struct ib_sa_port),
1639 GFP_KERNEL);
1640 if (!sa_dev)
1641 return;
1642
1643 sa_dev->start_port = s;
1644 sa_dev->end_port = e;
1645
1646 for (i = 0; i <= e - s; ++i) {
fac70d51 1647 spin_lock_init(&sa_dev->port[i].ah_lock);
fe53ba2f 1648 if (!rdma_cap_ib_sa(device, i + 1))
fac70d51
EC		 1649 continue;
1650
1da177e4
LT		 1651 sa_dev->port[i].sm_ah = NULL;
1652 sa_dev->port[i].port_num = i + s;
1da177e4
LT		 1653
1654 sa_dev->port[i].agent =
1655 ib_register_mad_agent(device, i + s, IB_QPT_GSI,
1656 NULL, 0, send_handler,
0f29b46d 1657 recv_handler, sa_dev, 0);
1da177e4
LT		 1658 if (IS_ERR(sa_dev->port[i].agent))
1659 goto err;
1660
c4028958 1661 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
08e3681a
MW		 1662
1663 count++;
1da177e4
LT		 1664 }
1665
08e3681a
MW		 1666 if (!count)
1667 goto free;
1668
1da177e4
LT		 1669 ib_set_client_data(device, &sa_client, sa_dev);
1670
1671 /*
1672 * We register our event handler after everything is set up,
1673 * and then update our cached info after the event handler is
1674 * registered to avoid any problems if a port changes state
1675 * during our initialization.
1676 */
1677
1678 INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
1679 if (ib_register_event_handler(&sa_dev->event_handler))
1680 goto err;
1681
08e3681a 1682 for (i = 0; i <= e - s; ++i) {
fe53ba2f 1683 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1684 update_sm_ah(&sa_dev->port[i].update_task);
08e3681a 1685 }
1da177e4
LT		 1686
1687 return;
1688
1689err:
08e3681a 1690 while (--i >= 0) {
fe53ba2f 1691 if (rdma_cap_ib_sa(device, i + 1))
fac70d51 1692 ib_unregister_mad_agent(sa_dev->port[i].agent);
08e3681a
MW		 1693 }
1694free:
1da177e4 1695 kfree(sa_dev);
1da177e4
LT		 1696 return;
1697}
1698
7c1eb45a 1699static void ib_sa_remove_one(struct ib_device *device, void *client_data)
1da177e4 1700{
7c1eb45a 1701 struct ib_sa_device *sa_dev = client_data;
1da177e4
LT		 1702 int i;
1703
1704 if (!sa_dev)
1705 return;
1706
1707 ib_unregister_event_handler(&sa_dev->event_handler);
1708
96e61fa5 1709 flush_workqueue(ib_wq);
0f47ae0b 1710
1da177e4 1711 for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
fe53ba2f 1712 if (rdma_cap_ib_sa(device, i + 1)) {
fac70d51
EC		 1713 ib_unregister_mad_agent(sa_dev->port[i].agent);
1714 if (sa_dev->port[i].sm_ah)
1715 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
1716 }
1717
1da177e4
LT		 1718 }
1719
1720 kfree(sa_dev);
1721}
1722
1723static int __init ib_sa_init(void)
1724{
1725 int ret;
1726
1da177e4
LT		 1727 get_random_bytes(&tid, sizeof tid);
1728
2ca546b9
KW		 1729 atomic_set(&ib_nl_sa_request_seq, 0);
1730
1da177e4 1731 ret = ib_register_client(&sa_client);
faec2f7b 1732 if (ret) {
1da177e4 1733 printk(KERN_ERR "Couldn't register ib_sa client\n");
faec2f7b
SH		 1734 goto err1;
1735 }
1736
1737 ret = mcast_init();
1738 if (ret) {
1739 printk(KERN_ERR "Couldn't initialize multicast handling\n");
1740 goto err2;
1741 }
1da177e4 1742
2ca546b9
KW		 1743 ib_nl_wq = create_singlethread_workqueue("ib_nl_sa_wq");
1744 if (!ib_nl_wq) {
1745 ret = -ENOMEM;
1746 goto err3;
1747 }
1748
1749 if (ibnl_add_client(RDMA_NL_LS, RDMA_NL_LS_NUM_OPS,
1750 ib_sa_cb_table)) {
1751 pr_err("Failed to add netlink callback\n");
1752 ret = -EINVAL;
1753 goto err4;
1754 }
1755 INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
1756
faec2f7b 1757 return 0;
2ca546b9
KW		 1758err4:
1759 destroy_workqueue(ib_nl_wq);
1760err3:
1761 mcast_cleanup();
faec2f7b
SH		 1762err2:
1763 ib_unregister_client(&sa_client);
1764err1:
1da177e4
LT		 1765 return ret;
1766}
1767
1768static void __exit ib_sa_cleanup(void)
1769{
2ca546b9
KW		 1770 ibnl_remove_client(RDMA_NL_LS);
1771 cancel_delayed_work(&ib_nl_timed_work);
1772 flush_workqueue(ib_nl_wq);
1773 destroy_workqueue(ib_nl_wq);
faec2f7b 1774 mcast_cleanup();
1da177e4 1775 ib_unregister_client(&sa_client);
5d7edb3c 1776 idr_destroy(&query_idr);
1da177e4
LT		 1777}
1778
1779module_init(ib_sa_init);
1780module_exit(ib_sa_cleanup);
Linux 6.x block layer and io_uring tree(s)