1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_RPC
41 #include <liblustre.h>
44 #include <obd_support.h>
45 #include <obd_class.h>
46 #include <lustre_lib.h>
47 #include <lustre_ha.h>
48 #include <lustre_import.h>
49 #include <lustre_req_layout.h>
51 #include "ptlrpc_internal.h"
53 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
54 struct ptlrpc_client *cl)
56 cl->cli_request_portal = req_portal;
57 cl->cli_reply_portal = rep_portal;
61 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid)
63 struct ptlrpc_connection *c;
65 lnet_process_id_t peer;
68 err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
70 CERROR("cannot find peer %s!\n", uuid->uuid);
74 c = ptlrpc_connection_get(peer, self, uuid);
76 memcpy(c->c_remote_uuid.uuid,
77 uuid->uuid, sizeof(c->c_remote_uuid.uuid));
80 CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c);
85 static inline struct ptlrpc_bulk_desc *new_bulk(int npages, int type, int portal)
87 struct ptlrpc_bulk_desc *desc;
89 OBD_ALLOC(desc, offsetof (struct ptlrpc_bulk_desc, bd_iov[npages]));
93 spin_lock_init(&desc->bd_lock);
94 cfs_waitq_init(&desc->bd_waitq);
95 desc->bd_max_iov = npages;
96 desc->bd_iov_count = 0;
97 LNetInvalidateHandle(&desc->bd_md_h);
98 desc->bd_portal = portal;
104 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
105 int npages, int type, int portal)
107 struct obd_import *imp = req->rq_import;
108 struct ptlrpc_bulk_desc *desc;
111 LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
112 desc = new_bulk(npages, type, portal);
116 desc->bd_import_generation = req->rq_import_generation;
117 desc->bd_import = class_import_get(imp);
120 desc->bd_cbid.cbid_fn = client_bulk_callback;
121 desc->bd_cbid.cbid_arg = desc;
123 /* This makes req own desc, and free it when she frees herself */
129 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
130 int npages, int type, int portal)
132 struct obd_export *exp = req->rq_export;
133 struct ptlrpc_bulk_desc *desc;
136 LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK);
138 desc = new_bulk(npages, type, portal);
142 desc->bd_export = class_export_get(exp);
145 desc->bd_cbid.cbid_fn = server_bulk_callback;
146 desc->bd_cbid.cbid_arg = desc;
148 /* NB we don't assign rq_bulk here; server-side requests are
149 * re-used, and the handler frees the bulk desc explicitly. */
154 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
155 cfs_page_t *page, int pageoffset, int len)
157 LASSERT(desc->bd_iov_count < desc->bd_max_iov);
158 LASSERT(page != NULL);
159 LASSERT(pageoffset >= 0);
161 LASSERT(pageoffset + len <= CFS_PAGE_SIZE);
165 ptlrpc_add_bulk_page(desc, page, pageoffset, len);
168 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
172 LASSERT(desc != NULL);
173 LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
174 LASSERT(!desc->bd_network_rw); /* network hands off or */
175 LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
177 sptlrpc_enc_pool_put_pages(desc);
180 class_export_put(desc->bd_export);
182 class_import_put(desc->bd_import);
184 OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc,
185 bd_iov[desc->bd_max_iov]));
189 /* Set server timelimit for this req */
190 void ptlrpc_at_set_req_timeout(struct ptlrpc_request *req)
196 LASSERT(req->rq_import);
199 /* non-AT settings */
200 req->rq_timeout = req->rq_import->imp_server_timeout ?
201 obd_timeout / 2 : obd_timeout;
202 lustre_msg_set_timeout(req->rq_reqmsg, req->rq_timeout);
206 at = &req->rq_import->imp_at;
207 idx = import_at_get_index(req->rq_import,
208 req->rq_request_portal);
209 serv_est = at_get(&at->iat_service_estimate[idx]);
210 req->rq_timeout = at_est2timeout(serv_est);
211 /* We could get even fancier here, using history to predict increased
214 /* Let the server know what this RPC timeout is by putting it in the
216 lustre_msg_set_timeout(req->rq_reqmsg, req->rq_timeout);
219 /* Adjust max service estimate based on server value */
220 static void ptlrpc_at_adj_service(struct ptlrpc_request *req,
221 unsigned int serv_est)
227 /* do estimate only if is not in recovery */
228 if (!(req->rq_send_state & (LUSTRE_IMP_FULL | LUSTRE_IMP_CONNECTING)))
231 LASSERT(req->rq_import);
232 at = &req->rq_import->imp_at;
234 idx = import_at_get_index(req->rq_import, req->rq_request_portal);
235 /* max service estimates are tracked on the server side,
236 so just keep minimal history here */
237 oldse = at_add(&at->iat_service_estimate[idx], serv_est);
239 CDEBUG(D_ADAPTTO, "The RPC service estimate for %s ptl %d "
240 "has changed from %d to %d\n",
241 req->rq_import->imp_obd->obd_name,req->rq_request_portal,
242 oldse, at_get(&at->iat_service_estimate[idx]));
245 /* Expected network latency per remote node (secs) */
246 int ptlrpc_at_get_net_latency(struct ptlrpc_request *req)
248 return AT_OFF ? 0 : at_get(&req->rq_import->imp_at.iat_net_latency);
251 /* Adjust expected network latency */
252 static void ptlrpc_at_adj_net_latency(struct ptlrpc_request *req,
253 unsigned int service_time)
255 unsigned int nl, oldnl;
257 time_t now = cfs_time_current_sec();
259 LASSERT(req->rq_import);
260 at = &req->rq_import->imp_at;
262 /* Network latency is total time less server processing time */
263 nl = max_t(int, now - req->rq_sent - service_time, 0) +1/*st rounding*/;
264 if (service_time > now - req->rq_sent + 3 /* bz16408 */)
265 CWARN("Reported service time %u > total measured time "
266 CFS_DURATION_T"\n", service_time,
267 cfs_time_sub(now, req->rq_sent));
269 oldnl = at_add(&at->iat_net_latency, nl);
271 CDEBUG(D_ADAPTTO, "The network latency for %s (nid %s) "
272 "has changed from %d to %d\n",
273 req->rq_import->imp_obd->obd_name,
275 &req->rq_import->imp_connection->c_remote_uuid),
276 oldnl, at_get(&at->iat_net_latency));
279 static int unpack_reply(struct ptlrpc_request *req)
283 /* Clear reply swab mask; we may have already swabbed an early reply */
284 req->rq_rep_swab_mask = 0;
286 rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
288 DEBUG_REQ(D_ERROR, req, "unpack_rep failed: %d", rc);
292 rc = lustre_unpack_rep_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
294 DEBUG_REQ(D_ERROR, req, "unpack ptlrpc body failed: %d", rc);
301 * Handle an early reply message, called with the rq_lock held.
302 * If anything goes wrong just ignore it - same as if it never happened
304 static int ptlrpc_at_recv_early_reply(struct ptlrpc_request *req)
306 struct ptlrpc_request *early_req;
312 spin_unlock(&req->rq_lock);
314 rc = sptlrpc_cli_unwrap_early_reply(req, &early_req);
316 spin_lock(&req->rq_lock);
320 rc = unpack_reply(early_req);
322 /* Expecting to increase the service time estimate here */
323 ptlrpc_at_adj_service(req,
324 lustre_msg_get_timeout(early_req->rq_repmsg));
325 ptlrpc_at_adj_net_latency(req,
326 lustre_msg_get_service_time(early_req->rq_repmsg));
329 sptlrpc_cli_finish_early_reply(early_req);
331 spin_lock(&req->rq_lock);
334 /* Adjust the local timeout for this req */
335 ptlrpc_at_set_req_timeout(req);
337 olddl = req->rq_deadline;
338 /* server assumes it now has rq_timeout from when it sent the
339 early reply, so client should give it at least that long. */
340 req->rq_deadline = cfs_time_current_sec() + req->rq_timeout +
341 ptlrpc_at_get_net_latency(req);
343 DEBUG_REQ(D_ADAPTTO, req,
344 "Early reply #%d, new deadline in "CFS_DURATION_T"s "
345 "("CFS_DURATION_T"s)", req->rq_early_count,
346 cfs_time_sub(req->rq_deadline,
347 cfs_time_current_sec()),
348 cfs_time_sub(req->rq_deadline, olddl));
354 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
356 struct list_head *l, *tmp;
357 struct ptlrpc_request *req;
362 list_for_each_safe(l, tmp, &pool->prp_req_list) {
363 req = list_entry(l, struct ptlrpc_request, rq_list);
364 list_del(&req->rq_list);
365 LASSERT(req->rq_reqbuf);
366 LASSERT(req->rq_reqbuf_len == pool->prp_rq_size);
367 OBD_FREE(req->rq_reqbuf, pool->prp_rq_size);
368 OBD_FREE(req, sizeof(*req));
370 OBD_FREE(pool, sizeof(*pool));
373 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
378 while (size < pool->prp_rq_size + SPTLRPC_MAX_PAYLOAD)
381 LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
382 "Trying to change pool size with nonempty pool "
383 "from %d to %d bytes\n", pool->prp_rq_size, size);
385 spin_lock(&pool->prp_lock);
386 pool->prp_rq_size = size;
387 for (i = 0; i < num_rq; i++) {
388 struct ptlrpc_request *req;
389 struct lustre_msg *msg;
391 spin_unlock(&pool->prp_lock);
392 OBD_ALLOC(req, sizeof(struct ptlrpc_request));
395 OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
397 OBD_FREE(req, sizeof(struct ptlrpc_request));
400 req->rq_reqbuf = msg;
401 req->rq_reqbuf_len = size;
403 spin_lock(&pool->prp_lock);
404 list_add_tail(&req->rq_list, &pool->prp_req_list);
406 spin_unlock(&pool->prp_lock);
410 struct ptlrpc_request_pool *ptlrpc_init_rq_pool(int num_rq, int msgsize,
411 void (*populate_pool)(struct ptlrpc_request_pool *, int))
413 struct ptlrpc_request_pool *pool;
415 OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
419 /* Request next power of two for the allocation, because internally
420 kernel would do exactly this */
422 spin_lock_init(&pool->prp_lock);
423 CFS_INIT_LIST_HEAD(&pool->prp_req_list);
424 pool->prp_rq_size = msgsize;
425 pool->prp_populate = populate_pool;
427 populate_pool(pool, num_rq);
429 if (list_empty(&pool->prp_req_list)) {
430 /* have not allocated a single request for the pool */
431 OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
437 static struct ptlrpc_request *ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
439 struct ptlrpc_request *request;
440 struct lustre_msg *reqbuf;
445 spin_lock(&pool->prp_lock);
447 /* See if we have anything in a pool, and bail out if nothing,
448 * in writeout path, where this matters, this is safe to do, because
449 * nothing is lost in this case, and when some in-flight requests
450 * complete, this code will be called again. */
451 if (unlikely(list_empty(&pool->prp_req_list))) {
452 spin_unlock(&pool->prp_lock);
456 request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
458 list_del(&request->rq_list);
459 spin_unlock(&pool->prp_lock);
461 LASSERT(request->rq_reqbuf);
462 LASSERT(request->rq_pool);
464 reqbuf = request->rq_reqbuf;
465 memset(request, 0, sizeof(*request));
466 request->rq_reqbuf = reqbuf;
467 request->rq_reqbuf_len = pool->prp_rq_size;
468 request->rq_pool = pool;
473 static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
475 struct ptlrpc_request_pool *pool = request->rq_pool;
477 spin_lock(&pool->prp_lock);
478 LASSERT(list_empty(&request->rq_list));
479 list_add_tail(&request->rq_list, &pool->prp_req_list);
480 spin_unlock(&pool->prp_lock);
483 static int __ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
484 __u32 version, int opcode,
485 int count, __u32 *lengths, char **bufs,
486 struct ptlrpc_cli_ctx *ctx)
488 struct obd_import *imp = request->rq_import;
493 request->rq_cli_ctx = sptlrpc_cli_ctx_get(ctx);
495 rc = sptlrpc_req_get_ctx(request);
500 sptlrpc_req_set_flavor(request, opcode);
502 rc = lustre_pack_request(request, imp->imp_msg_magic, count,
505 LASSERT(!request->rq_pool);
509 lustre_msg_add_version(request->rq_reqmsg, version);
510 request->rq_send_state = LUSTRE_IMP_FULL;
511 request->rq_type = PTL_RPC_MSG_REQUEST;
512 request->rq_export = NULL;
514 request->rq_req_cbid.cbid_fn = request_out_callback;
515 request->rq_req_cbid.cbid_arg = request;
517 request->rq_reply_cbid.cbid_fn = reply_in_callback;
518 request->rq_reply_cbid.cbid_arg = request;
520 request->rq_phase = RQ_PHASE_NEW;
522 request->rq_request_portal = imp->imp_client->cli_request_portal;
523 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
525 ptlrpc_at_set_req_timeout(request);
527 spin_lock_init(&request->rq_lock);
528 CFS_INIT_LIST_HEAD(&request->rq_list);
529 CFS_INIT_LIST_HEAD(&request->rq_timed_list);
530 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
531 CFS_INIT_LIST_HEAD(&request->rq_mod_list);
532 CFS_INIT_LIST_HEAD(&request->rq_ctx_chain);
533 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
534 CFS_INIT_LIST_HEAD(&request->rq_history_list);
535 cfs_waitq_init(&request->rq_reply_waitq);
536 request->rq_xid = ptlrpc_next_xid();
537 atomic_set(&request->rq_refcount, 1);
539 lustre_msg_set_opc(request->rq_reqmsg, opcode);
543 sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
545 class_import_put(imp);
549 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
550 __u32 version, int opcode, char **bufs,
551 struct ptlrpc_cli_ctx *ctx)
555 count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
556 return __ptlrpc_request_bufs_pack(request, version, opcode, count,
557 request->rq_pill.rc_area[RCL_CLIENT],
560 EXPORT_SYMBOL(ptlrpc_request_bufs_pack);
562 int ptlrpc_request_pack(struct ptlrpc_request *request,
563 __u32 version, int opcode)
565 return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
569 struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
570 struct ptlrpc_request_pool *pool)
572 struct ptlrpc_request *request = NULL;
575 request = ptlrpc_prep_req_from_pool(pool);
578 OBD_ALLOC_PTR(request);
581 LASSERTF((unsigned long)imp > 0x1000, "%p", imp);
582 LASSERT(imp != LP_POISON);
583 LASSERTF((unsigned long)imp->imp_client > 0x1000, "%p",
585 LASSERT(imp->imp_client != LP_POISON);
587 request->rq_import = class_import_get(imp);
589 CERROR("request allocation out of memory\n");
595 static struct ptlrpc_request *
596 ptlrpc_request_alloc_internal(struct obd_import *imp,
597 struct ptlrpc_request_pool * pool,
598 const struct req_format *format)
600 struct ptlrpc_request *request;
602 request = __ptlrpc_request_alloc(imp, pool);
606 req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
607 req_capsule_set(&request->rq_pill, format);
611 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
612 const struct req_format *format)
614 return ptlrpc_request_alloc_internal(imp, NULL, format);
617 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
618 struct ptlrpc_request_pool * pool,
619 const struct req_format *format)
621 return ptlrpc_request_alloc_internal(imp, pool, format);
624 void ptlrpc_request_free(struct ptlrpc_request *request)
626 if (request->rq_pool)
627 __ptlrpc_free_req_to_pool(request);
629 OBD_FREE_PTR(request);
632 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
633 const struct req_format *format,
634 __u32 version, int opcode)
636 struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
640 rc = ptlrpc_request_pack(req, version, opcode);
642 ptlrpc_request_free(req);
649 struct ptlrpc_request *
650 ptlrpc_prep_req_pool(struct obd_import *imp,
651 __u32 version, int opcode,
652 int count, __u32 *lengths, char **bufs,
653 struct ptlrpc_request_pool *pool)
655 struct ptlrpc_request *request;
658 request = __ptlrpc_request_alloc(imp, pool);
662 rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
663 lengths, bufs, NULL);
665 ptlrpc_request_free(request);
671 struct ptlrpc_request *
672 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
673 __u32 *lengths, char **bufs)
675 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
679 struct ptlrpc_request_set *ptlrpc_prep_set(void)
681 struct ptlrpc_request_set *set;
684 OBD_ALLOC(set, sizeof *set);
687 CFS_INIT_LIST_HEAD(&set->set_requests);
688 cfs_waitq_init(&set->set_waitq);
689 set->set_remaining = 0;
690 spin_lock_init(&set->set_new_req_lock);
691 CFS_INIT_LIST_HEAD(&set->set_new_requests);
692 CFS_INIT_LIST_HEAD(&set->set_cblist);
697 /* Finish with this set; opposite of prep_set. */
698 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
700 struct list_head *tmp;
701 struct list_head *next;
706 /* Requests on the set should either all be completed, or all be new */
707 expected_phase = (set->set_remaining == 0) ?
708 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
709 list_for_each (tmp, &set->set_requests) {
710 struct ptlrpc_request *req =
711 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
713 LASSERT(req->rq_phase == expected_phase);
717 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
719 list_for_each_safe(tmp, next, &set->set_requests) {
720 struct ptlrpc_request *req =
721 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
722 list_del_init(&req->rq_set_chain);
724 LASSERT(req->rq_phase == expected_phase);
726 if (req->rq_phase == RQ_PHASE_NEW) {
728 if (req->rq_interpret_reply != NULL) {
729 ptlrpc_interpterer_t interpreter =
730 req->rq_interpret_reply;
732 /* higher level (i.e. LOV) failed;
733 * let the sub reqs clean up */
734 req->rq_status = -EBADR;
735 interpreter(NULL, req, &req->rq_async_args,
738 set->set_remaining--;
742 ptlrpc_req_finished (req);
745 LASSERT(set->set_remaining == 0);
747 OBD_FREE(set, sizeof(*set));
751 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
752 set_interpreter_func fn, void *data)
754 struct ptlrpc_set_cbdata *cbdata;
756 OBD_ALLOC_PTR(cbdata);
760 cbdata->psc_interpret = fn;
761 cbdata->psc_data = data;
762 list_add_tail(&cbdata->psc_item, &set->set_cblist);
767 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
768 struct ptlrpc_request *req)
770 /* The set takes over the caller's request reference */
771 list_add_tail(&req->rq_set_chain, &set->set_requests);
773 set->set_remaining++;
775 atomic_inc(&req->rq_import->imp_inflight);
779 * Lock so many callers can add things, the context that owns the set
780 * is supposed to notice these and move them into the set proper.
782 int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
783 struct ptlrpc_request *req)
785 struct ptlrpc_request_set *set = pc->pc_set;
788 * Let caller know that we stopped and will not handle this request.
789 * It needs to take care itself of request.
791 if (test_bit(LIOD_STOP, &pc->pc_flags))
794 spin_lock(&set->set_new_req_lock);
796 * The set takes over the caller's request reference.
798 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
800 spin_unlock(&set->set_new_req_lock);
803 * Let thead know that we added something and better it to wake up
806 cfs_waitq_signal(&set->set_waitq);
811 * Based on the current state of the import, determine if the request
812 * can be sent, is an error, or should be delayed.
814 * Returns true if this request should be delayed. If false, and
815 * *status is set, then the request can not be sent and *status is the
816 * error code. If false and status is 0, then request can be sent.
818 * The imp->imp_lock must be held.
820 static int ptlrpc_import_delay_req(struct obd_import *imp,
821 struct ptlrpc_request *req, int *status)
826 LASSERT (status != NULL);
829 if (req->rq_ctx_init || req->rq_ctx_fini) {
830 /* always allow ctx init/fini rpc go through */
831 } else if (imp->imp_state == LUSTRE_IMP_NEW) {
832 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
835 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
836 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
838 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
839 imp->imp_state == LUSTRE_IMP_CONNECTING) {
840 /* allow CONNECT even if import is invalid */ ;
841 if (atomic_read(&imp->imp_inval_count) != 0) {
842 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
845 } else if ((imp->imp_invalid && (!imp->imp_recon_bk)) ||
846 imp->imp_obd->obd_no_recov) {
847 /* If the import has been invalidated (such as by an OST
848 * failure), and if the import(MGC) tried all of its connection
849 * list (Bug 13464), the request must fail with -ESHUTDOWN.
850 * This indicates the requests should be discarded; an -EIO
851 * may result in a resend of the request. */
852 if (!imp->imp_deactive)
853 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
854 *status = -ESHUTDOWN; /* bz 12940 */
855 } else if (req->rq_import_generation != imp->imp_generation) {
856 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
858 } else if (req->rq_send_state != imp->imp_state) {
859 /* invalidate in progress - any requests should be drop */
860 if (atomic_read(&imp->imp_inval_count) != 0) {
861 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
863 } else if (imp->imp_dlm_fake || req->rq_no_delay) {
864 *status = -EWOULDBLOCK;
873 static int ptlrpc_check_reply(struct ptlrpc_request *req)
878 /* serialise with network callback */
879 spin_lock(&req->rq_lock);
884 if (req->rq_net_err && !req->rq_timedout) {
885 spin_unlock(&req->rq_lock);
886 rc = ptlrpc_expire_one_request(req);
887 spin_lock(&req->rq_lock);
901 ptlrpc_at_recv_early_reply(req);
902 GOTO(out, rc = 0); /* keep waiting */
907 spin_unlock(&req->rq_lock);
908 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
912 static int ptlrpc_check_status(struct ptlrpc_request *req)
917 err = lustre_msg_get_status(req->rq_repmsg);
918 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
919 struct obd_import *imp = req->rq_import;
920 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
921 LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
922 " with %s. The %s operation failed with %d\n",
923 libcfs_nid2str(imp->imp_connection->c_peer.nid),
924 ll_opcode2str(opc), err);
925 RETURN(err < 0 ? err : -EINVAL);
929 DEBUG_REQ(D_INFO, req, "status is %d", err);
930 } else if (err > 0) {
931 /* XXX: translate this error from net to host */
932 DEBUG_REQ(D_INFO, req, "status is %d", err);
939 * Callback function called when client receives RPC reply for \a req.
941 static int after_reply(struct ptlrpc_request *req)
943 struct obd_import *imp = req->rq_import;
944 struct obd_device *obd = req->rq_import->imp_obd;
946 struct timeval work_start;
950 LASSERT(!req->rq_receiving_reply);
952 LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
955 * NB Until this point, the whole of the incoming message,
956 * including buflens, status etc is in the sender's byte order.
959 rc = sptlrpc_cli_unwrap_reply(req);
961 DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
966 * Security layer unwrap might ask resend this request.
971 rc = unpack_reply(req);
975 do_gettimeofday(&work_start);
976 timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
977 if (obd->obd_svc_stats != NULL)
978 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
981 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
982 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
983 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
984 lustre_msg_get_type(req->rq_repmsg));
988 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_PAUSE_REP, obd_fail_val);
989 ptlrpc_at_adj_service(req, lustre_msg_get_timeout(req->rq_repmsg));
990 ptlrpc_at_adj_net_latency(req,
991 lustre_msg_get_service_time(req->rq_repmsg));
993 rc = ptlrpc_check_status(req);
994 imp->imp_connect_error = rc;
998 * Either we've been evicted, or the server has failed for
999 * some reason. Try to reconnect, and if that fails, punt to
1002 if (ll_rpc_recoverable_error(rc)) {
1003 if (req->rq_send_state != LUSTRE_IMP_FULL ||
1004 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
1007 ptlrpc_request_handle_notconn(req);
1012 * Let's look if server sent slv. Do it only for RPC with
1015 ldlm_cli_update_pool(req);
1019 * Store transno in reqmsg for replay.
1021 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
1022 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
1024 if (req->rq_import->imp_replayable) {
1025 spin_lock(&imp->imp_lock);
1027 * No point in adding already-committed requests to the replay
1028 * list, we will just remove them immediately. b=9829
1030 if (req->rq_transno != 0 &&
1032 lustre_msg_get_last_committed(req->rq_repmsg) ||
1034 ptlrpc_retain_replayable_request(req, imp);
1035 else if (req->rq_commit_cb != NULL) {
1036 spin_unlock(&imp->imp_lock);
1037 req->rq_commit_cb(req);
1038 spin_lock(&imp->imp_lock);
1042 * Replay-enabled imports return commit-status information.
1044 if (lustre_msg_get_last_committed(req->rq_repmsg)) {
1045 imp->imp_peer_committed_transno =
1046 lustre_msg_get_last_committed(req->rq_repmsg);
1048 ptlrpc_free_committed(imp);
1049 spin_unlock(&imp->imp_lock);
1055 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
1057 struct obd_import *imp;
1061 LASSERT(req->rq_phase == RQ_PHASE_NEW);
1062 if (req->rq_sent && (req->rq_sent > cfs_time_current_sec()))
1065 req->rq_phase = RQ_PHASE_RPC;
1067 imp = req->rq_import;
1068 spin_lock(&imp->imp_lock);
1070 req->rq_import_generation = imp->imp_generation;
1072 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1073 spin_lock (&req->rq_lock);
1074 req->rq_waiting = 1;
1075 spin_unlock (&req->rq_lock);
1077 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
1079 lustre_msg_get_status(req->rq_reqmsg) ,
1080 ptlrpc_import_state_name(req->rq_send_state),
1081 ptlrpc_import_state_name(imp->imp_state));
1082 LASSERT(list_empty (&req->rq_list));
1084 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1085 spin_unlock(&imp->imp_lock);
1090 spin_unlock(&imp->imp_lock);
1091 req->rq_status = rc;
1092 req->rq_phase = RQ_PHASE_INTERPRET;
1096 /* XXX this is the same as ptlrpc_queue_wait */
1097 LASSERT(list_empty(&req->rq_list));
1098 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1099 spin_unlock(&imp->imp_lock);
1101 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1103 rc = sptlrpc_req_refresh_ctx(req, -1);
1106 req->rq_status = rc;
1109 req->rq_wait_ctx = 1;
1114 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
1115 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1116 imp->imp_obd->obd_uuid.uuid,
1117 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1118 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1119 lustre_msg_get_opc(req->rq_reqmsg));
1121 rc = ptl_send_rpc(req, 0);
1123 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
1124 req->rq_net_err = 1;
1130 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
1131 int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
1133 struct list_head *tmp;
1134 int force_timer_recalc = 0;
1137 if (set->set_remaining == 0)
1140 list_for_each(tmp, &set->set_requests) {
1141 struct ptlrpc_request *req =
1142 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1143 struct obd_import *imp = req->rq_import;
1146 if (req->rq_phase == RQ_PHASE_NEW &&
1147 ptlrpc_send_new_req(req)) {
1148 force_timer_recalc = 1;
1150 /* delayed send - skip */
1151 if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
1154 if (!(req->rq_phase == RQ_PHASE_RPC ||
1155 req->rq_phase == RQ_PHASE_BULK ||
1156 req->rq_phase == RQ_PHASE_INTERPRET ||
1157 req->rq_phase == RQ_PHASE_COMPLETE)) {
1158 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
1162 if (req->rq_phase == RQ_PHASE_COMPLETE)
1165 if (req->rq_phase == RQ_PHASE_INTERPRET)
1166 GOTO(interpret, req->rq_status);
1168 if (req->rq_net_err && !req->rq_timedout)
1169 ptlrpc_expire_one_request(req);
1172 ptlrpc_unregister_reply(req);
1173 req->rq_replied = 0;
1174 if (req->rq_status == 0)
1175 req->rq_status = -EIO;
1176 req->rq_phase = RQ_PHASE_INTERPRET;
1178 spin_lock(&imp->imp_lock);
1179 list_del_init(&req->rq_list);
1180 spin_unlock(&imp->imp_lock);
1182 GOTO(interpret, req->rq_status);
1185 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
1186 * will only be set after rq_timedout, but the oig waiting
1187 * path sets rq_intr irrespective of whether ptlrpcd has
1188 * seen a timeout. our policy is to only interpret
1189 * interrupted rpcs after they have timed out */
1190 if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
1191 req->rq_wait_ctx)) {
1192 /* NB could be on delayed list */
1193 ptlrpc_unregister_reply(req);
1194 req->rq_status = -EINTR;
1195 req->rq_phase = RQ_PHASE_INTERPRET;
1197 spin_lock(&imp->imp_lock);
1198 list_del_init(&req->rq_list);
1199 spin_unlock(&imp->imp_lock);
1201 GOTO(interpret, req->rq_status);
1204 if (req->rq_phase == RQ_PHASE_RPC) {
1205 if (req->rq_timedout || req->rq_resend ||
1206 req->rq_waiting || req->rq_wait_ctx) {
1209 ptlrpc_unregister_reply(req);
1211 spin_lock(&imp->imp_lock);
1213 if (ptlrpc_import_delay_req(imp, req, &status)){
1214 spin_unlock(&imp->imp_lock);
1218 list_del_init(&req->rq_list);
1220 req->rq_status = status;
1221 req->rq_phase = RQ_PHASE_INTERPRET;
1222 spin_unlock(&imp->imp_lock);
1223 GOTO(interpret, req->rq_status);
1225 if (req->rq_no_resend && !req->rq_wait_ctx) {
1226 req->rq_status = -ENOTCONN;
1227 req->rq_phase = RQ_PHASE_INTERPRET;
1228 spin_unlock(&imp->imp_lock);
1229 GOTO(interpret, req->rq_status);
1231 list_add_tail(&req->rq_list,
1232 &imp->imp_sending_list);
1234 spin_unlock(&imp->imp_lock);
1236 req->rq_waiting = 0;
1238 if (req->rq_timedout||req->rq_resend) {
1239 /* This is re-sending anyways,
1240 * let's mark req as resend. */
1242 lustre_msg_add_flags(req->rq_reqmsg,
1245 __u64 old_xid = req->rq_xid;
1247 ptlrpc_unregister_bulk (req);
1249 /* ensure previous bulk fails */
1250 req->rq_xid = ptlrpc_next_xid();
1251 CDEBUG(D_HA, "resend bulk "
1254 old_xid, req->rq_xid);
1258 * rq_wait_ctx is only touched by ptlrpcd,
1259 * so no lock is needed here.
1261 status = sptlrpc_req_refresh_ctx(req, -1);
1264 req->rq_status = status;
1265 force_timer_recalc = 1;
1267 req->rq_wait_ctx = 1;
1272 req->rq_wait_ctx = 0;
1275 rc = ptl_send_rpc(req, 0);
1277 DEBUG_REQ(D_HA, req, "send failed (%d)",
1279 force_timer_recalc = 1;
1280 req->rq_net_err = 1;
1282 /* need to reset the timeout */
1283 force_timer_recalc = 1;
1286 spin_lock(&req->rq_lock);
1288 if (req->rq_early) {
1289 ptlrpc_at_recv_early_reply(req);
1290 spin_unlock(&req->rq_lock);
1294 /* Still waiting for a reply? */
1295 if (req->rq_receiving_reply) {
1296 spin_unlock(&req->rq_lock);
1300 /* Did we actually receive a reply? */
1301 if (!req->rq_replied) {
1302 spin_unlock(&req->rq_lock);
1306 spin_unlock(&req->rq_lock);
1308 spin_lock(&imp->imp_lock);
1309 list_del_init(&req->rq_list);
1310 spin_unlock(&imp->imp_lock);
1312 req->rq_status = after_reply(req);
1313 if (req->rq_resend) {
1314 /* Add this req to the delayed list so
1315 it can be errored if the import is
1316 evicted after recovery. */
1317 spin_lock(&imp->imp_lock);
1318 list_add_tail(&req->rq_list,
1319 &imp->imp_delayed_list);
1320 spin_unlock(&imp->imp_lock);
1324 /* If there is no bulk associated with this request,
1325 * then we're done and should let the interpreter
1326 * process the reply. Similarly if the RPC returned
1327 * an error, and therefore the bulk will never arrive.
1329 if (req->rq_bulk == NULL || req->rq_status != 0) {
1330 req->rq_phase = RQ_PHASE_INTERPRET;
1331 GOTO(interpret, req->rq_status);
1334 req->rq_phase = RQ_PHASE_BULK;
1337 LASSERT(req->rq_phase == RQ_PHASE_BULK);
1338 if (ptlrpc_bulk_active(req->rq_bulk))
1341 if (!req->rq_bulk->bd_success) {
1342 /* The RPC reply arrived OK, but the bulk screwed
1343 * up! Dead wierd since the server told us the RPC
1344 * was good after getting the REPLY for her GET or
1345 * the ACK for her PUT. */
1346 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1350 req->rq_phase = RQ_PHASE_INTERPRET;
1353 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
1354 LASSERT(!req->rq_receiving_reply);
1356 ptlrpc_unregister_reply(req);
1357 if (req->rq_bulk != NULL)
1358 ptlrpc_unregister_bulk (req);
1360 if (req->rq_interpret_reply != NULL) {
1361 ptlrpc_interpterer_t interpreter =
1362 req->rq_interpret_reply;
1363 req->rq_status = interpreter(NULL, req,
1364 &req->rq_async_args,
1367 req->rq_phase = RQ_PHASE_COMPLETE;
1369 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
1370 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1371 imp->imp_obd->obd_uuid.uuid,
1372 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1373 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1374 lustre_msg_get_opc(req->rq_reqmsg));
1376 atomic_dec(&imp->imp_inflight);
1377 set->set_remaining--;
1378 cfs_waitq_signal(&imp->imp_recovery_waitq);
1381 /* If we hit an error, we want to recover promptly. */
1382 RETURN(set->set_remaining == 0 || force_timer_recalc);
1385 /* Return 1 if we should give up, else 0 */
1386 int ptlrpc_expire_one_request(struct ptlrpc_request *req)
1388 struct obd_import *imp = req->rq_import;
1392 DEBUG_REQ(D_ERROR|D_NETERROR, req,
1393 "%s (sent at "CFS_TIME_T", "CFS_DURATION_T"s ago)",
1394 req->rq_net_err ? "network error" : "timeout",
1395 req->rq_sent, cfs_time_sub(cfs_time_current_sec(),
1399 LCONSOLE_WARN("Request x"LPU64" sent from %s to NID %s "
1400 CFS_DURATION_T"s ago has timed out "
1401 "(limit "CFS_DURATION_T"s).\n", req->rq_xid,
1402 req->rq_import->imp_obd->obd_name,
1403 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1404 cfs_time_sub(cfs_time_current_sec(), req->rq_sent),
1405 cfs_time_sub(req->rq_deadline, req->rq_sent));
1408 if (imp != NULL && obd_debug_peer_on_timeout)
1409 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
1411 spin_lock(&req->rq_lock);
1412 req->rq_timedout = 1;
1413 spin_unlock(&req->rq_lock);
1415 ptlrpc_unregister_reply (req);
1417 if (obd_dump_on_timeout)
1418 libcfs_debug_dumplog();
1420 if (req->rq_bulk != NULL)
1421 ptlrpc_unregister_bulk (req);
1424 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
1428 /* The DLM server doesn't want recovery run on its imports. */
1429 if (imp->imp_dlm_fake)
1432 /* If this request is for recovery or other primordial tasks,
1433 * then error it out here. */
1434 if (req->rq_ctx_init || req->rq_ctx_fini ||
1435 req->rq_send_state != LUSTRE_IMP_FULL ||
1436 imp->imp_obd->obd_no_recov) {
1437 DEBUG_REQ(D_RPCTRACE, req, "err -110, sent_state=%s (now=%s)",
1438 ptlrpc_import_state_name(req->rq_send_state),
1439 ptlrpc_import_state_name(imp->imp_state));
1440 spin_lock(&req->rq_lock);
1441 req->rq_status = -ETIMEDOUT;
1443 spin_unlock(&req->rq_lock);
1447 /* if a request can't be resent we can't wait for an answer after
1449 if (req->rq_no_resend) {
1450 DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
1454 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
1459 int ptlrpc_expired_set(void *data)
1461 struct ptlrpc_request_set *set = data;
1462 struct list_head *tmp;
1463 time_t now = cfs_time_current_sec();
1466 LASSERT(set != NULL);
1468 /* A timeout expired; see which reqs it applies to... */
1469 list_for_each (tmp, &set->set_requests) {
1470 struct ptlrpc_request *req =
1471 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1473 /* request in-flight? */
1474 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting &&
1476 (req->rq_phase == RQ_PHASE_BULK)))
1479 if (req->rq_timedout || /* already dealt with */
1480 req->rq_deadline > now) /* not expired */
1483 /* deal with this guy */
1484 ptlrpc_expire_one_request (req);
1487 /* When waiting for a whole set, we always to break out of the
1488 * sleep so we can recalculate the timeout, or enable interrupts
1489 * iff everyone's timed out.
1494 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1496 spin_lock(&req->rq_lock);
1498 spin_unlock(&req->rq_lock);
1501 void ptlrpc_interrupted_set(void *data)
1503 struct ptlrpc_request_set *set = data;
1504 struct list_head *tmp;
1506 LASSERT(set != NULL);
1507 CERROR("INTERRUPTED SET %p\n", set);
1509 list_for_each(tmp, &set->set_requests) {
1510 struct ptlrpc_request *req =
1511 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1513 if (req->rq_phase != RQ_PHASE_RPC)
1516 ptlrpc_mark_interrupted(req);
1520 /* get the smallest timeout in the set; this does NOT set a timeout. */
1521 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1523 struct list_head *tmp;
1524 time_t now = cfs_time_current_sec();
1526 struct ptlrpc_request *req;
1530 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1532 list_for_each(tmp, &set->set_requests) {
1533 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1535 /* request in-flight? */
1536 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) ||
1537 (req->rq_phase == RQ_PHASE_BULK) ||
1538 (req->rq_phase == RQ_PHASE_NEW)))
1541 if (req->rq_timedout) /* already timed out */
1544 if (req->rq_wait_ctx) /* waiting for ctx */
1547 if (req->rq_phase == RQ_PHASE_NEW)
1548 deadline = req->rq_sent;
1550 deadline = req->rq_sent + req->rq_timeout;
1552 if (deadline <= now) /* actually expired already */
1553 timeout = 1; /* ASAP */
1554 else if (timeout == 0 || timeout > deadline - now)
1555 timeout = deadline - now;
1560 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1562 struct list_head *tmp;
1563 struct ptlrpc_request *req;
1564 struct l_wait_info lwi;
1568 if (list_empty(&set->set_requests))
1571 list_for_each(tmp, &set->set_requests) {
1572 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1573 if (req->rq_phase == RQ_PHASE_NEW)
1574 (void)ptlrpc_send_new_req(req);
1578 timeout = ptlrpc_set_next_timeout(set);
1580 /* wait until all complete, interrupted, or an in-flight
1582 CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
1584 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
1586 ptlrpc_interrupted_set, set);
1587 rc = l_wait_event(set->set_waitq,
1588 ptlrpc_check_set(NULL, set), &lwi);
1590 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1592 /* -EINTR => all requests have been flagged rq_intr so next
1594 * -ETIMEOUTD => someone timed out. When all reqs have
1595 * timed out, signals are enabled allowing completion with
1597 * I don't really care if we go once more round the loop in
1598 * the error cases -eeb. */
1599 } while (rc != 0 || set->set_remaining != 0);
1601 LASSERT(set->set_remaining == 0);
1604 list_for_each(tmp, &set->set_requests) {
1605 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1607 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1608 if (req->rq_status != 0)
1609 rc = req->rq_status;
1612 if (set->set_interpret != NULL) {
1613 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1615 rc = interpreter (set, set->set_arg, rc);
1617 struct ptlrpc_set_cbdata *cbdata, *n;
1620 list_for_each_entry_safe(cbdata, n,
1621 &set->set_cblist, psc_item) {
1622 list_del_init(&cbdata->psc_item);
1623 err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
1626 OBD_FREE_PTR(cbdata);
1633 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1636 if (request == NULL) {
1641 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1642 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1643 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1644 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1645 LASSERTF(!request->rq_replay, "req %p\n", request);
1646 LASSERT(request->rq_cli_ctx);
1648 req_capsule_fini(&request->rq_pill);
1650 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1651 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1652 if (request->rq_import != NULL) {
1654 spin_lock(&request->rq_import->imp_lock);
1655 list_del_init(&request->rq_mod_list);
1656 list_del_init(&request->rq_replay_list);
1658 spin_unlock(&request->rq_import->imp_lock);
1660 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1662 if (atomic_read(&request->rq_refcount) != 0) {
1663 DEBUG_REQ(D_ERROR, request,
1664 "freeing request with nonzero refcount");
1668 if (request->rq_repbuf != NULL)
1669 sptlrpc_cli_free_repbuf(request);
1670 if (request->rq_export != NULL) {
1671 class_export_put(request->rq_export);
1672 request->rq_export = NULL;
1674 if (request->rq_import != NULL) {
1675 class_import_put(request->rq_import);
1676 request->rq_import = NULL;
1678 if (request->rq_bulk != NULL)
1679 ptlrpc_free_bulk(request->rq_bulk);
1681 if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
1682 sptlrpc_cli_free_reqbuf(request);
1684 sptlrpc_req_put_ctx(request, !locked);
1686 if (request->rq_pool)
1687 __ptlrpc_free_req_to_pool(request);
1689 OBD_FREE(request, sizeof(*request));
1693 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1694 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1696 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1697 (void)__ptlrpc_req_finished(request, 1);
1700 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1703 if (request == NULL)
1706 if (request == LP_POISON ||
1707 request->rq_reqmsg == LP_POISON) {
1708 CERROR("dereferencing freed request (bug 575)\n");
1713 DEBUG_REQ(D_INFO, request, "refcount now %u",
1714 atomic_read(&request->rq_refcount) - 1);
1716 if (atomic_dec_and_test(&request->rq_refcount)) {
1717 __ptlrpc_free_req(request, locked);
1724 void ptlrpc_req_finished(struct ptlrpc_request *request)
1726 __ptlrpc_req_finished(request, 0);
1729 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1731 return request->rq_xid;
1733 EXPORT_SYMBOL(ptlrpc_req_xid);
1735 /* Disengage the client's reply buffer from the network
1736 * NB does _NOT_ unregister any client-side bulk.
1737 * IDEMPOTENT, but _not_ safe against concurrent callers.
1738 * The request owner (i.e. the thread doing the I/O) must call...
1740 void ptlrpc_unregister_reply (struct ptlrpc_request *request)
1744 struct l_wait_info lwi;
1746 LASSERT(!in_interrupt ()); /* might sleep */
1747 if (!ptlrpc_client_recv_or_unlink(request))
1748 /* Nothing left to do */
1751 LNetMDUnlink (request->rq_reply_md_h);
1753 /* We have to l_wait_event() whatever the result, to give liblustre
1754 * a chance to run reply_in_callback(), and to make sure we've
1755 * unlinked before returning a req to the pool */
1757 if (request->rq_set != NULL)
1758 wq = &request->rq_set->set_waitq;
1760 wq = &request->rq_reply_waitq;
1763 /* Network access will complete in finite time but the HUGE
1764 * timeout lets us CWARN for visibility of sluggish NALs */
1765 lwi = LWI_TIMEOUT(cfs_time_seconds(LONG_UNLINK), NULL, NULL);
1766 rc = l_wait_event (*wq, !ptlrpc_client_recv_or_unlink(request),
1771 LASSERT (rc == -ETIMEDOUT);
1772 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout "
1773 "rvcng=%d unlnk=%d", request->rq_receiving_reply,
1774 request->rq_must_unlink);
1778 /* caller must hold imp->imp_lock */
1779 void ptlrpc_free_committed(struct obd_import *imp)
1781 struct list_head *tmp, *saved;
1782 struct ptlrpc_request *req;
1783 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1786 LASSERT(imp != NULL);
1788 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1791 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1792 imp->imp_generation == imp->imp_last_generation_checked) {
1793 CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
1794 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1799 CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
1800 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1801 imp->imp_generation);
1802 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1803 imp->imp_last_generation_checked = imp->imp_generation;
1805 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1806 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1808 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1809 LASSERT(req != last_req);
1812 if (req->rq_import_generation < imp->imp_generation) {
1813 DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
1817 if (req->rq_replay) {
1818 DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
1822 /* not yet committed */
1823 if (req->rq_transno > imp->imp_peer_committed_transno) {
1824 DEBUG_REQ(D_RPCTRACE, req, "stopping search");
1828 DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
1829 imp->imp_peer_committed_transno);
1831 spin_lock(&req->rq_lock);
1833 spin_unlock(&req->rq_lock);
1834 if (req->rq_commit_cb != NULL)
1835 req->rq_commit_cb(req);
1836 list_del_init(&req->rq_replay_list);
1837 __ptlrpc_req_finished(req, 1);
1844 void ptlrpc_cleanup_client(struct obd_import *imp)
1851 void ptlrpc_resend_req(struct ptlrpc_request *req)
1853 DEBUG_REQ(D_HA, req, "going to resend");
1854 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
1855 req->rq_status = -EAGAIN;
1857 spin_lock(&req->rq_lock);
1859 req->rq_net_err = 0;
1860 req->rq_timedout = 0;
1862 __u64 old_xid = req->rq_xid;
1864 /* ensure previous bulk fails */
1865 req->rq_xid = ptlrpc_next_xid();
1866 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1867 old_xid, req->rq_xid);
1869 ptlrpc_wake_client_req(req);
1870 spin_unlock(&req->rq_lock);
1873 /* XXX: this function and rq_status are currently unused */
1874 void ptlrpc_restart_req(struct ptlrpc_request *req)
1876 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1877 req->rq_status = -ERESTARTSYS;
1879 spin_lock(&req->rq_lock);
1880 req->rq_restart = 1;
1881 req->rq_timedout = 0;
1882 ptlrpc_wake_client_req(req);
1883 spin_unlock(&req->rq_lock);
1886 static int expired_request(void *data)
1888 struct ptlrpc_request *req = data;
1891 /* some failure can suspend regular timeouts */
1892 if (ptlrpc_check_suspend())
1895 /* deadline may have changed with an early reply */
1896 if (req->rq_deadline > cfs_time_current_sec())
1899 RETURN(ptlrpc_expire_one_request(req));
1902 static void interrupted_request(void *data)
1904 struct ptlrpc_request *req = data;
1905 DEBUG_REQ(D_HA, req, "request interrupted");
1906 spin_lock(&req->rq_lock);
1908 spin_unlock(&req->rq_lock);
1911 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
1914 atomic_inc(&req->rq_refcount);
1918 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
1919 struct obd_import *imp)
1921 struct list_head *tmp;
1923 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1925 /* clear this for new requests that were resent as well
1926 as resent replayed requests. */
1927 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1929 /* don't re-add requests that have been replayed */
1930 if (!list_empty(&req->rq_replay_list))
1933 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
1935 LASSERT(imp->imp_replayable);
1936 /* Balanced in ptlrpc_free_committed, usually. */
1937 ptlrpc_request_addref(req);
1938 list_for_each_prev(tmp, &imp->imp_replay_list) {
1939 struct ptlrpc_request *iter =
1940 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1942 /* We may have duplicate transnos if we create and then
1943 * open a file, or for closes retained if to match creating
1944 * opens, so use req->rq_xid as a secondary key.
1945 * (See bugs 684, 685, and 428.)
1946 * XXX no longer needed, but all opens need transnos!
1948 if (iter->rq_transno > req->rq_transno)
1951 if (iter->rq_transno == req->rq_transno) {
1952 LASSERT(iter->rq_xid != req->rq_xid);
1953 if (iter->rq_xid > req->rq_xid)
1957 list_add(&req->rq_replay_list, &iter->rq_replay_list);
1961 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
1964 int ptlrpc_queue_wait(struct ptlrpc_request *req)
1968 struct l_wait_info lwi;
1969 struct obd_import *imp = req->rq_import;
1970 cfs_duration_t timeout = CFS_TICK;
1974 LASSERT(req->rq_set == NULL);
1975 LASSERT(!req->rq_receiving_reply);
1976 atomic_inc(&imp->imp_inflight);
1978 /* for distributed debugging */
1979 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1980 LASSERT(imp->imp_obd != NULL);
1981 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
1982 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1983 imp->imp_obd->obd_uuid.uuid,
1984 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1985 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1986 lustre_msg_get_opc(req->rq_reqmsg));
1988 /* Mark phase here for a little debug help */
1989 req->rq_phase = RQ_PHASE_RPC;
1991 spin_lock(&imp->imp_lock);
1992 req->rq_import_generation = imp->imp_generation;
1994 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1995 list_del(&req->rq_list);
1997 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1998 spin_unlock(&imp->imp_lock);
2000 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
2002 ptlrpc_import_state_name(req->rq_send_state),
2003 ptlrpc_import_state_name(imp->imp_state));
2004 lwi = LWI_INTR(interrupted_request, req);
2005 rc = l_wait_event(req->rq_reply_waitq,
2006 (req->rq_send_state == imp->imp_state ||
2007 req->rq_err || req->rq_intr),
2009 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
2011 ptlrpc_import_state_name(imp->imp_state),
2012 ptlrpc_import_state_name(req->rq_send_state),
2013 req->rq_err, req->rq_intr);
2015 spin_lock(&imp->imp_lock);
2016 list_del_init(&req->rq_list);
2019 /* rq_status was set locally */
2022 else if (req->rq_intr) {
2025 else if (req->rq_no_resend) {
2026 spin_unlock(&imp->imp_lock);
2027 GOTO(out, rc = -ETIMEDOUT);
2035 list_del_init(&req->rq_list);
2036 spin_unlock(&imp->imp_lock);
2037 req->rq_status = rc; // XXX this ok?
2041 if (req->rq_resend) {
2042 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
2044 if (req->rq_bulk != NULL) {
2045 ptlrpc_unregister_bulk (req);
2047 /* bulk requests are supposed to be
2048 * idempotent, so we are free to bump the xid
2049 * here, which we need to do before
2050 * registering the bulk again (bug 6371).
2051 * print the old xid first for sanity.
2053 DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
2054 req->rq_xid = ptlrpc_next_xid();
2057 DEBUG_REQ(D_HA, req, "resending: ");
2060 /* XXX this is the same as ptlrpc_set_wait */
2061 LASSERT(list_empty(&req->rq_list));
2062 list_add_tail(&req->rq_list, &imp->imp_sending_list);
2063 spin_unlock(&imp->imp_lock);
2065 rc = sptlrpc_req_refresh_ctx(req, 0);
2068 /* we got fatal ctx refresh error, directly jump out
2069 * thus we can pass back the actual error code.
2071 spin_lock(&imp->imp_lock);
2072 list_del_init(&req->rq_list);
2073 spin_unlock(&imp->imp_lock);
2075 CERROR("Failed to refresh ctx of req %p: %d\n", req, rc);
2078 /* simulating we got error during send rpc */
2082 rc = ptl_send_rpc(req, 0);
2084 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
2087 timeoutl = req->rq_deadline - cfs_time_current_sec();
2088 timeout = (timeoutl <= 0 || rc) ? CFS_TICK :
2089 cfs_time_seconds(timeoutl);
2090 DEBUG_REQ(D_NET, req,
2091 "-- sleeping for "CFS_DURATION_T" ticks", timeout);
2092 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
2094 brc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
2095 if (brc == -ETIMEDOUT && ((req->rq_deadline > cfs_time_current_sec()) ||
2096 ptlrpc_check_and_wait_suspend(req)))
2100 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
2101 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
2102 imp->imp_obd->obd_uuid.uuid,
2103 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
2104 libcfs_nid2str(imp->imp_connection->c_peer.nid),
2105 lustre_msg_get_opc(req->rq_reqmsg));
2107 spin_lock(&imp->imp_lock);
2108 list_del_init(&req->rq_list);
2109 spin_unlock(&imp->imp_lock);
2111 /* If the reply was received normally, this just grabs the spinlock
2112 * (ensuring the reply callback has returned), sees that
2113 * req->rq_receiving_reply is clear and returns. */
2114 ptlrpc_unregister_reply (req);
2118 DEBUG_REQ(D_RPCTRACE, req, "err rc=%d status=%d",
2119 rc, req->rq_status);
2120 GOTO(out, rc = rc ? rc : -EIO);
2124 /* Should only be interrupted if we timed out. */
2125 if (!req->rq_timedout)
2126 DEBUG_REQ(D_ERROR, req,
2127 "rq_intr set but rq_timedout not");
2128 GOTO(out, rc = -EINTR);
2131 /* Resend if we need to */
2132 if (req->rq_resend) {
2133 /* ...unless we were specifically told otherwise. */
2134 if (req->rq_no_resend)
2135 GOTO(out, rc = -ETIMEDOUT);
2136 spin_lock(&imp->imp_lock);
2140 if (req->rq_timedout) { /* non-recoverable timeout */
2141 GOTO(out, rc = -ETIMEDOUT);
2144 if (!req->rq_replied) {
2145 /* How can this be? -eeb */
2146 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
2148 GOTO(out, rc = req->rq_status);
2151 rc = after_reply(req);
2152 /* NB may return +ve success rc */
2153 if (req->rq_resend) {
2154 spin_lock(&imp->imp_lock);
2159 if (req->rq_bulk != NULL) {
2161 /* success so far. Note that anything going wrong
2162 * with bulk now, is EXTREMELY strange, since the
2163 * server must have believed that the bulk
2164 * tranferred OK before she replied with success to
2166 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
2167 brc = l_wait_event(req->rq_reply_waitq,
2168 !ptlrpc_bulk_active(req->rq_bulk),
2170 LASSERT(brc == 0 || brc == -ETIMEDOUT);
2172 LASSERT(brc == -ETIMEDOUT);
2173 DEBUG_REQ(D_ERROR, req, "bulk timed out");
2175 } else if (!req->rq_bulk->bd_success) {
2176 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
2181 ptlrpc_unregister_bulk (req);
2184 LASSERT(!req->rq_receiving_reply);
2185 req->rq_phase = RQ_PHASE_INTERPRET;
2187 atomic_dec(&imp->imp_inflight);
2188 cfs_waitq_signal(&imp->imp_recovery_waitq);
2192 struct ptlrpc_replay_async_args {
2194 int praa_old_status;
2197 static int ptlrpc_replay_interpret(const struct lu_env *env,
2198 struct ptlrpc_request *req,
2199 void * data, int rc)
2201 struct ptlrpc_replay_async_args *aa = data;
2202 struct obd_import *imp = req->rq_import;
2205 atomic_dec(&imp->imp_replay_inflight);
2207 if (!req->rq_replied) {
2208 CERROR("request replay timed out, restarting recovery\n");
2209 GOTO(out, rc = -ETIMEDOUT);
2212 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
2213 (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
2214 lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
2215 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
2217 /* The transno had better not change over replay. */
2218 LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
2219 lustre_msg_get_transno(req->rq_repmsg));
2221 DEBUG_REQ(D_HA, req, "got rep");
2223 /* let the callback do fixups, possibly including in the request */
2224 if (req->rq_replay_cb)
2225 req->rq_replay_cb(req);
2227 if (req->rq_replied &&
2228 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
2229 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
2230 lustre_msg_get_status(req->rq_repmsg),
2231 aa->praa_old_status);
2233 /* Put it back for re-replay. */
2234 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
2238 * Errors while replay can set transno to 0, but
2239 * imp_last_replay_transno shouldn't be set to 0 anyway
2241 if (req->rq_transno > 0) {
2242 spin_lock(&imp->imp_lock);
2243 LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
2244 imp->imp_last_replay_transno = req->rq_transno;
2245 spin_unlock(&imp->imp_lock);
2247 CERROR("Transno is 0 during replay!\n");
2248 /* continue with recovery */
2249 rc = ptlrpc_import_recovery_state_machine(imp);
2251 req->rq_send_state = aa->praa_old_state;
2254 /* this replay failed, so restart recovery */
2255 ptlrpc_connect_import(imp, NULL);
2260 int ptlrpc_replay_req(struct ptlrpc_request *req)
2262 struct ptlrpc_replay_async_args *aa;
2265 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
2266 /* Not handling automatic bulk replay yet (or ever?) */
2267 LASSERT(req->rq_bulk == NULL);
2269 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
2270 aa = ptlrpc_req_async_args(req);
2271 memset(aa, 0, sizeof *aa);
2273 /* Prepare request to be resent with ptlrpcd */
2274 aa->praa_old_state = req->rq_send_state;
2275 req->rq_send_state = LUSTRE_IMP_REPLAY;
2276 req->rq_phase = RQ_PHASE_NEW;
2278 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
2280 req->rq_interpret_reply = ptlrpc_replay_interpret;
2281 /* Readjust the timeout for current conditions */
2282 ptlrpc_at_set_req_timeout(req);
2284 DEBUG_REQ(D_HA, req, "REPLAY");
2286 atomic_inc(&req->rq_import->imp_replay_inflight);
2287 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
2289 ptlrpcd_add_req(req);
2293 void ptlrpc_abort_inflight(struct obd_import *imp)
2295 struct list_head *tmp, *n;
2298 /* Make sure that no new requests get processed for this import.
2299 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
2300 * this flag and then putting requests on sending_list or delayed_list.
2302 spin_lock(&imp->imp_lock);
2304 /* XXX locking? Maybe we should remove each request with the list
2305 * locked? Also, how do we know if the requests on the list are
2306 * being freed at this time?
2308 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
2309 struct ptlrpc_request *req =
2310 list_entry(tmp, struct ptlrpc_request, rq_list);
2312 DEBUG_REQ(D_RPCTRACE, req, "inflight");
2314 spin_lock (&req->rq_lock);
2315 if (req->rq_import_generation < imp->imp_generation) {
2317 req->rq_status = -EINTR;
2318 ptlrpc_wake_client_req(req);
2320 spin_unlock (&req->rq_lock);
2323 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
2324 struct ptlrpc_request *req =
2325 list_entry(tmp, struct ptlrpc_request, rq_list);
2327 DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
2329 spin_lock (&req->rq_lock);
2330 if (req->rq_import_generation < imp->imp_generation) {
2332 req->rq_status = -EINTR;
2333 ptlrpc_wake_client_req(req);
2335 spin_unlock (&req->rq_lock);
2338 /* Last chance to free reqs left on the replay list, but we
2339 * will still leak reqs that haven't committed. */
2340 if (imp->imp_replayable)
2341 ptlrpc_free_committed(imp);
2343 spin_unlock(&imp->imp_lock);
2348 void ptlrpc_abort_set(struct ptlrpc_request_set *set)
2350 struct list_head *tmp, *n;
2352 LASSERT(set != NULL);
2354 list_for_each_safe(tmp, n, &set->set_requests) {
2355 struct ptlrpc_request *req =
2356 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
2358 spin_lock (&req->rq_lock);
2359 if (req->rq_phase != RQ_PHASE_RPC) {
2360 spin_unlock (&req->rq_lock);
2365 req->rq_status = -EINTR;
2366 ptlrpc_wake_client_req(req);
2367 spin_unlock (&req->rq_lock);
2371 static __u64 ptlrpc_last_xid;
2372 static spinlock_t ptlrpc_last_xid_lock;
2374 /* Initialize the XID for the node. This is common among all requests on
2375 * this node, and only requires the property that it is monotonically
2376 * increasing. It does not need to be sequential. Since this is also used
2377 * as the RDMA match bits, it is important that a single client NOT have
2378 * the same match bits for two different in-flight requests, hence we do
2379 * NOT want to have an XID per target or similar.
2381 * To avoid an unlikely collision between match bits after a client reboot
2382 * (which would cause old to be delivered into the wrong buffer) we initialize
2383 * the XID based on the current time, assuming a maximum RPC rate of 1M RPC/s.
2384 * If the time is clearly incorrect, we instead use a 62-bit random number.
2385 * In the worst case the random number will overflow 1M RPCs per second in
2386 * 9133 years, or permutations thereof.
2388 #define YEAR_2004 (1ULL << 30)
2389 void ptlrpc_init_xid(void)
2391 time_t now = cfs_time_current_sec();
2393 spin_lock_init(&ptlrpc_last_xid_lock);
2394 if (now < YEAR_2004) {
2395 ll_get_random_bytes(&ptlrpc_last_xid, sizeof(ptlrpc_last_xid));
2396 ptlrpc_last_xid >>= 2;
2397 ptlrpc_last_xid |= (1ULL << 61);
2399 ptlrpc_last_xid = (now << 20);
2403 __u64 ptlrpc_next_xid(void)
2406 spin_lock(&ptlrpc_last_xid_lock);
2407 tmp = ++ptlrpc_last_xid;
2408 spin_unlock(&ptlrpc_last_xid_lock);
2412 __u64 ptlrpc_sample_next_xid(void)
2414 #if BITS_PER_LONG == 32
2415 /* need to avoid possible word tearing on 32-bit systems */
2417 spin_lock(&ptlrpc_last_xid_lock);
2418 tmp = ptlrpc_last_xid + 1;
2419 spin_unlock(&ptlrpc_last_xid_lock);
2422 /* No need to lock, since returned value is racy anyways */
2423 return ptlrpc_last_xid + 1;
2426 EXPORT_SYMBOL(ptlrpc_sample_next_xid);