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;
359 LASSERT(pool != NULL);
361 spin_lock(&pool->prp_lock);
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 spin_unlock(&pool->prp_lock);
371 OBD_FREE(pool, sizeof(*pool));
374 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
379 while (size < pool->prp_rq_size + SPTLRPC_MAX_PAYLOAD)
382 LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
383 "Trying to change pool size with nonempty pool "
384 "from %d to %d bytes\n", pool->prp_rq_size, size);
386 spin_lock(&pool->prp_lock);
387 pool->prp_rq_size = size;
388 for (i = 0; i < num_rq; i++) {
389 struct ptlrpc_request *req;
390 struct lustre_msg *msg;
392 spin_unlock(&pool->prp_lock);
393 OBD_ALLOC(req, sizeof(struct ptlrpc_request));
396 OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
398 OBD_FREE(req, sizeof(struct ptlrpc_request));
401 req->rq_reqbuf = msg;
402 req->rq_reqbuf_len = size;
404 spin_lock(&pool->prp_lock);
405 list_add_tail(&req->rq_list, &pool->prp_req_list);
407 spin_unlock(&pool->prp_lock);
411 struct ptlrpc_request_pool *
412 ptlrpc_init_rq_pool(int num_rq, int msgsize,
413 void (*populate_pool)(struct ptlrpc_request_pool *, int))
415 struct ptlrpc_request_pool *pool;
417 OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
421 /* Request next power of two for the allocation, because internally
422 kernel would do exactly this */
424 spin_lock_init(&pool->prp_lock);
425 CFS_INIT_LIST_HEAD(&pool->prp_req_list);
426 pool->prp_rq_size = msgsize;
427 pool->prp_populate = populate_pool;
429 populate_pool(pool, num_rq);
431 if (list_empty(&pool->prp_req_list)) {
432 /* have not allocated a single request for the pool */
433 OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
439 static struct ptlrpc_request *
440 ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
442 struct ptlrpc_request *request;
443 struct lustre_msg *reqbuf;
448 spin_lock(&pool->prp_lock);
450 /* See if we have anything in a pool, and bail out if nothing,
451 * in writeout path, where this matters, this is safe to do, because
452 * nothing is lost in this case, and when some in-flight requests
453 * complete, this code will be called again. */
454 if (unlikely(list_empty(&pool->prp_req_list))) {
455 spin_unlock(&pool->prp_lock);
459 request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
461 list_del_init(&request->rq_list);
462 spin_unlock(&pool->prp_lock);
464 LASSERT(request->rq_reqbuf);
465 LASSERT(request->rq_pool);
467 reqbuf = request->rq_reqbuf;
468 memset(request, 0, sizeof(*request));
469 request->rq_reqbuf = reqbuf;
470 request->rq_reqbuf_len = pool->prp_rq_size;
471 request->rq_pool = pool;
476 static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
478 struct ptlrpc_request_pool *pool = request->rq_pool;
480 spin_lock(&pool->prp_lock);
481 LASSERT(list_empty(&request->rq_list));
482 LASSERT(!request->rq_receiving_reply);
483 list_add_tail(&request->rq_list, &pool->prp_req_list);
484 spin_unlock(&pool->prp_lock);
487 static int __ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
488 __u32 version, int opcode,
489 int count, __u32 *lengths, char **bufs,
490 struct ptlrpc_cli_ctx *ctx)
492 struct obd_import *imp = request->rq_import;
497 request->rq_cli_ctx = sptlrpc_cli_ctx_get(ctx);
499 rc = sptlrpc_req_get_ctx(request);
504 sptlrpc_req_set_flavor(request, opcode);
506 rc = lustre_pack_request(request, imp->imp_msg_magic, count,
509 LASSERT(!request->rq_pool);
513 lustre_msg_add_version(request->rq_reqmsg, version);
514 request->rq_send_state = LUSTRE_IMP_FULL;
515 request->rq_type = PTL_RPC_MSG_REQUEST;
516 request->rq_export = NULL;
518 request->rq_req_cbid.cbid_fn = request_out_callback;
519 request->rq_req_cbid.cbid_arg = request;
521 request->rq_reply_cbid.cbid_fn = reply_in_callback;
522 request->rq_reply_cbid.cbid_arg = request;
524 request->rq_reply_deadline = 0;
525 request->rq_phase = RQ_PHASE_NEW;
526 request->rq_next_phase = RQ_PHASE_UNDEFINED;
528 request->rq_request_portal = imp->imp_client->cli_request_portal;
529 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
531 ptlrpc_at_set_req_timeout(request);
533 spin_lock_init(&request->rq_lock);
534 CFS_INIT_LIST_HEAD(&request->rq_list);
535 CFS_INIT_LIST_HEAD(&request->rq_timed_list);
536 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
537 CFS_INIT_LIST_HEAD(&request->rq_mod_list);
538 CFS_INIT_LIST_HEAD(&request->rq_ctx_chain);
539 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
540 CFS_INIT_LIST_HEAD(&request->rq_history_list);
541 CFS_INIT_LIST_HEAD(&request->rq_exp_list);
542 cfs_waitq_init(&request->rq_reply_waitq);
543 request->rq_xid = ptlrpc_next_xid();
544 atomic_set(&request->rq_refcount, 1);
546 lustre_msg_set_opc(request->rq_reqmsg, opcode);
550 sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
552 class_import_put(imp);
556 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
557 __u32 version, int opcode, char **bufs,
558 struct ptlrpc_cli_ctx *ctx)
562 count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
563 return __ptlrpc_request_bufs_pack(request, version, opcode, count,
564 request->rq_pill.rc_area[RCL_CLIENT],
567 EXPORT_SYMBOL(ptlrpc_request_bufs_pack);
569 int ptlrpc_request_pack(struct ptlrpc_request *request,
570 __u32 version, int opcode)
572 return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
576 struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
577 struct ptlrpc_request_pool *pool)
579 struct ptlrpc_request *request = NULL;
582 request = ptlrpc_prep_req_from_pool(pool);
585 OBD_ALLOC_PTR(request);
588 LASSERTF((unsigned long)imp > 0x1000, "%p", imp);
589 LASSERT(imp != LP_POISON);
590 LASSERTF((unsigned long)imp->imp_client > 0x1000, "%p",
592 LASSERT(imp->imp_client != LP_POISON);
594 request->rq_import = class_import_get(imp);
596 CERROR("request allocation out of memory\n");
602 static struct ptlrpc_request *
603 ptlrpc_request_alloc_internal(struct obd_import *imp,
604 struct ptlrpc_request_pool * pool,
605 const struct req_format *format)
607 struct ptlrpc_request *request;
609 request = __ptlrpc_request_alloc(imp, pool);
613 req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
614 req_capsule_set(&request->rq_pill, format);
618 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
619 const struct req_format *format)
621 return ptlrpc_request_alloc_internal(imp, NULL, format);
624 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
625 struct ptlrpc_request_pool * pool,
626 const struct req_format *format)
628 return ptlrpc_request_alloc_internal(imp, pool, format);
631 void ptlrpc_request_free(struct ptlrpc_request *request)
633 if (request->rq_pool)
634 __ptlrpc_free_req_to_pool(request);
636 OBD_FREE_PTR(request);
639 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
640 const struct req_format *format,
641 __u32 version, int opcode)
643 struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
647 rc = ptlrpc_request_pack(req, version, opcode);
649 ptlrpc_request_free(req);
656 struct ptlrpc_request *
657 ptlrpc_prep_req_pool(struct obd_import *imp,
658 __u32 version, int opcode,
659 int count, __u32 *lengths, char **bufs,
660 struct ptlrpc_request_pool *pool)
662 struct ptlrpc_request *request;
665 request = __ptlrpc_request_alloc(imp, pool);
669 rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
670 lengths, bufs, NULL);
672 ptlrpc_request_free(request);
678 struct ptlrpc_request *
679 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
680 __u32 *lengths, char **bufs)
682 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
686 struct ptlrpc_request_set *ptlrpc_prep_set(void)
688 struct ptlrpc_request_set *set;
691 OBD_ALLOC(set, sizeof *set);
694 CFS_INIT_LIST_HEAD(&set->set_requests);
695 cfs_waitq_init(&set->set_waitq);
696 set->set_remaining = 0;
697 spin_lock_init(&set->set_new_req_lock);
698 CFS_INIT_LIST_HEAD(&set->set_new_requests);
699 CFS_INIT_LIST_HEAD(&set->set_cblist);
704 /* Finish with this set; opposite of prep_set. */
705 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
707 struct list_head *tmp;
708 struct list_head *next;
713 /* Requests on the set should either all be completed, or all be new */
714 expected_phase = (set->set_remaining == 0) ?
715 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
716 list_for_each (tmp, &set->set_requests) {
717 struct ptlrpc_request *req =
718 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
720 LASSERT(req->rq_phase == expected_phase);
724 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
726 list_for_each_safe(tmp, next, &set->set_requests) {
727 struct ptlrpc_request *req =
728 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
729 list_del_init(&req->rq_set_chain);
731 LASSERT(req->rq_phase == expected_phase);
733 if (req->rq_phase == RQ_PHASE_NEW) {
735 if (req->rq_interpret_reply != NULL) {
736 ptlrpc_interpterer_t interpreter =
737 req->rq_interpret_reply;
739 /* higher level (i.e. LOV) failed;
740 * let the sub reqs clean up */
741 req->rq_status = -EBADR;
742 interpreter(NULL, req, &req->rq_async_args,
745 set->set_remaining--;
749 ptlrpc_req_finished (req);
752 LASSERT(set->set_remaining == 0);
754 OBD_FREE(set, sizeof(*set));
758 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
759 set_interpreter_func fn, void *data)
761 struct ptlrpc_set_cbdata *cbdata;
763 OBD_ALLOC_PTR(cbdata);
767 cbdata->psc_interpret = fn;
768 cbdata->psc_data = data;
769 list_add_tail(&cbdata->psc_item, &set->set_cblist);
774 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
775 struct ptlrpc_request *req)
777 /* The set takes over the caller's request reference */
778 list_add_tail(&req->rq_set_chain, &set->set_requests);
780 set->set_remaining++;
784 * Lock so many callers can add things, the context that owns the set
785 * is supposed to notice these and move them into the set proper.
787 int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
788 struct ptlrpc_request *req)
790 struct ptlrpc_request_set *set = pc->pc_set;
793 * Let caller know that we stopped and will not handle this request.
794 * It needs to take care itself of request.
796 if (test_bit(LIOD_STOP, &pc->pc_flags))
799 spin_lock(&set->set_new_req_lock);
801 * The set takes over the caller's request reference.
803 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
805 spin_unlock(&set->set_new_req_lock);
808 * Let thead know that we added something and better it to wake up
811 cfs_waitq_signal(&set->set_waitq);
816 * Based on the current state of the import, determine if the request
817 * can be sent, is an error, or should be delayed.
819 * Returns true if this request should be delayed. If false, and
820 * *status is set, then the request can not be sent and *status is the
821 * error code. If false and status is 0, then request can be sent.
823 * The imp->imp_lock must be held.
825 static int ptlrpc_import_delay_req(struct obd_import *imp,
826 struct ptlrpc_request *req, int *status)
831 LASSERT (status != NULL);
834 if (req->rq_ctx_init || req->rq_ctx_fini) {
835 /* always allow ctx init/fini rpc go through */
836 } else if (imp->imp_state == LUSTRE_IMP_NEW) {
837 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
840 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
841 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
843 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
844 imp->imp_state == LUSTRE_IMP_CONNECTING) {
845 /* allow CONNECT even if import is invalid */ ;
846 if (atomic_read(&imp->imp_inval_count) != 0) {
847 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
850 } else if ((imp->imp_invalid && (!imp->imp_recon_bk)) ||
851 imp->imp_obd->obd_no_recov) {
852 /* If the import has been invalidated (such as by an OST
853 * failure), and if the import(MGC) tried all of its connection
854 * list (Bug 13464), the request must fail with -ESHUTDOWN.
855 * This indicates the requests should be discarded; an -EIO
856 * may result in a resend of the request. */
857 if (!imp->imp_deactive)
858 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
859 *status = -ESHUTDOWN; /* bz 12940 */
860 } else if (req->rq_import_generation != imp->imp_generation) {
861 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
863 } else if (req->rq_send_state != imp->imp_state) {
864 /* invalidate in progress - any requests should be drop */
865 if (atomic_read(&imp->imp_inval_count) != 0) {
866 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
868 } else if (imp->imp_dlm_fake || req->rq_no_delay) {
869 *status = -EWOULDBLOCK;
878 static int ptlrpc_check_reply(struct ptlrpc_request *req)
883 /* serialise with network callback */
884 spin_lock(&req->rq_lock);
886 if (ptlrpc_client_replied(req))
889 if (req->rq_net_err && !req->rq_timedout) {
890 spin_unlock(&req->rq_lock);
891 rc = ptlrpc_expire_one_request(req, 0);
892 spin_lock(&req->rq_lock);
905 if (ptlrpc_client_early(req)) {
906 ptlrpc_at_recv_early_reply(req);
907 GOTO(out, rc = 0); /* keep waiting */
912 spin_unlock(&req->rq_lock);
913 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
917 static int ptlrpc_check_status(struct ptlrpc_request *req)
922 err = lustre_msg_get_status(req->rq_repmsg);
923 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
924 struct obd_import *imp = req->rq_import;
925 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
926 LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
927 " with %s. The %s operation failed with %d\n",
928 libcfs_nid2str(imp->imp_connection->c_peer.nid),
929 ll_opcode2str(opc), err);
930 RETURN(err < 0 ? err : -EINVAL);
934 DEBUG_REQ(D_INFO, req, "status is %d", err);
935 } else if (err > 0) {
936 /* XXX: translate this error from net to host */
937 DEBUG_REQ(D_INFO, req, "status is %d", err);
944 * Callback function called when client receives RPC reply for \a req.
946 static int after_reply(struct ptlrpc_request *req)
948 struct obd_import *imp = req->rq_import;
949 struct obd_device *obd = req->rq_import->imp_obd;
951 struct timeval work_start;
955 LASSERT(!req->rq_receiving_reply);
957 LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
960 * NB Until this point, the whole of the incoming message,
961 * including buflens, status etc is in the sender's byte order.
964 rc = sptlrpc_cli_unwrap_reply(req);
966 DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
971 * Security layer unwrap might ask resend this request.
976 rc = unpack_reply(req);
980 do_gettimeofday(&work_start);
981 timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
982 if (obd->obd_svc_stats != NULL)
983 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
986 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
987 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
988 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
989 lustre_msg_get_type(req->rq_repmsg));
993 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_PAUSE_REP, obd_fail_val);
994 ptlrpc_at_adj_service(req, lustre_msg_get_timeout(req->rq_repmsg));
995 ptlrpc_at_adj_net_latency(req,
996 lustre_msg_get_service_time(req->rq_repmsg));
998 rc = ptlrpc_check_status(req);
999 imp->imp_connect_error = rc;
1003 * Either we've been evicted, or the server has failed for
1004 * some reason. Try to reconnect, and if that fails, punt to
1007 if (ll_rpc_recoverable_error(rc)) {
1008 if (req->rq_send_state != LUSTRE_IMP_FULL ||
1009 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
1012 ptlrpc_request_handle_notconn(req);
1017 * Let's look if server sent slv. Do it only for RPC with
1020 ldlm_cli_update_pool(req);
1024 * Store transno in reqmsg for replay.
1026 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
1027 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
1029 if (req->rq_import->imp_replayable) {
1030 spin_lock(&imp->imp_lock);
1032 * No point in adding already-committed requests to the replay
1033 * list, we will just remove them immediately. b=9829
1035 if (req->rq_transno != 0 &&
1037 lustre_msg_get_last_committed(req->rq_repmsg) ||
1039 ptlrpc_retain_replayable_request(req, imp);
1040 else if (req->rq_commit_cb != NULL) {
1041 spin_unlock(&imp->imp_lock);
1042 req->rq_commit_cb(req);
1043 spin_lock(&imp->imp_lock);
1047 * Replay-enabled imports return commit-status information.
1049 if (lustre_msg_get_last_committed(req->rq_repmsg)) {
1050 imp->imp_peer_committed_transno =
1051 lustre_msg_get_last_committed(req->rq_repmsg);
1053 ptlrpc_free_committed(imp);
1054 spin_unlock(&imp->imp_lock);
1060 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
1062 struct obd_import *imp;
1066 LASSERT(req->rq_phase == RQ_PHASE_NEW);
1067 if (req->rq_sent && (req->rq_sent > cfs_time_current_sec()))
1070 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
1072 imp = req->rq_import;
1073 spin_lock(&imp->imp_lock);
1075 req->rq_import_generation = imp->imp_generation;
1077 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1078 spin_lock(&req->rq_lock);
1079 req->rq_waiting = 1;
1080 spin_unlock(&req->rq_lock);
1082 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
1083 "(%s != %s)", lustre_msg_get_status(req->rq_reqmsg),
1084 ptlrpc_import_state_name(req->rq_send_state),
1085 ptlrpc_import_state_name(imp->imp_state));
1086 LASSERT(list_empty(&req->rq_list));
1087 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1088 atomic_inc(&req->rq_import->imp_inflight);
1089 spin_unlock(&imp->imp_lock);
1094 spin_unlock(&imp->imp_lock);
1095 req->rq_status = rc;
1096 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1100 LASSERT(list_empty(&req->rq_list));
1101 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1102 atomic_inc(&req->rq_import->imp_inflight);
1103 spin_unlock(&imp->imp_lock);
1105 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1107 rc = sptlrpc_req_refresh_ctx(req, -1);
1110 req->rq_status = rc;
1113 req->rq_wait_ctx = 1;
1118 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
1119 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1120 imp->imp_obd->obd_uuid.uuid,
1121 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1122 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1123 lustre_msg_get_opc(req->rq_reqmsg));
1125 rc = ptl_send_rpc(req, 0);
1127 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
1128 req->rq_net_err = 1;
1134 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
1135 int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
1137 struct list_head *tmp;
1138 int force_timer_recalc = 0;
1141 if (set->set_remaining == 0)
1144 list_for_each(tmp, &set->set_requests) {
1145 struct ptlrpc_request *req =
1146 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1147 struct obd_import *imp = req->rq_import;
1150 if (req->rq_phase == RQ_PHASE_NEW &&
1151 ptlrpc_send_new_req(req)) {
1152 force_timer_recalc = 1;
1155 /* delayed send - skip */
1156 if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
1159 if (!(req->rq_phase == RQ_PHASE_RPC ||
1160 req->rq_phase == RQ_PHASE_BULK ||
1161 req->rq_phase == RQ_PHASE_INTERPRET ||
1162 req->rq_phase == RQ_PHASE_UNREGISTERING ||
1163 req->rq_phase == RQ_PHASE_COMPLETE)) {
1164 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
1168 if (req->rq_phase == RQ_PHASE_UNREGISTERING) {
1169 LASSERT(req->rq_next_phase != req->rq_phase);
1170 LASSERT(req->rq_next_phase != RQ_PHASE_UNDEFINED);
1173 * Skip processing until reply is unlinked. We
1174 * can't return to pool before that and we can't
1175 * call interpret before that. We need to make
1176 * sure that all rdma transfers finished and will
1177 * not corrupt any data.
1179 if (ptlrpc_client_recv_or_unlink(req) ||
1180 ptlrpc_client_bulk_active(req))
1184 * Turn fail_loc off to prevent it from looping
1187 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
1188 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK,
1191 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK)) {
1192 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK,
1197 * Move to next phase if reply was successfully
1200 ptlrpc_rqphase_move(req, req->rq_next_phase);
1203 if (req->rq_phase == RQ_PHASE_COMPLETE)
1206 if (req->rq_phase == RQ_PHASE_INTERPRET)
1207 GOTO(interpret, req->rq_status);
1210 * Note that this also will start async reply unlink.
1212 if (req->rq_net_err && !req->rq_timedout) {
1213 ptlrpc_expire_one_request(req, 1);
1216 * Check if we still need to wait for unlink.
1218 if (ptlrpc_client_recv_or_unlink(req) ||
1219 ptlrpc_client_bulk_active(req))
1224 req->rq_replied = 0;
1225 if (req->rq_status == 0)
1226 req->rq_status = -EIO;
1227 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1228 GOTO(interpret, req->rq_status);
1231 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
1232 * will only be set after rq_timedout, but the synchronous IO
1233 * waiting path sets rq_intr irrespective of whether ptlrpcd
1234 * has seen a timeout. our policy is to only interpret
1235 * interrupted rpcs after they have timed out */
1236 if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
1237 req->rq_wait_ctx)) {
1238 req->rq_status = -EINTR;
1239 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1240 GOTO(interpret, req->rq_status);
1243 if (req->rq_phase == RQ_PHASE_RPC) {
1244 if (req->rq_timedout || req->rq_resend ||
1245 req->rq_waiting || req->rq_wait_ctx) {
1248 if (!ptlrpc_unregister_reply(req, 1))
1251 spin_lock(&imp->imp_lock);
1252 if (ptlrpc_import_delay_req(imp, req, &status)){
1253 /* put on delay list - only if we wait
1254 * recovery finished - before send */
1255 list_del_init(&req->rq_list);
1256 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1257 spin_unlock(&imp->imp_lock);
1262 req->rq_status = status;
1263 ptlrpc_rqphase_move(req,
1264 RQ_PHASE_INTERPRET);
1265 spin_unlock(&imp->imp_lock);
1266 GOTO(interpret, req->rq_status);
1268 if (req->rq_no_resend && !req->rq_wait_ctx) {
1269 req->rq_status = -ENOTCONN;
1270 ptlrpc_rqphase_move(req,
1271 RQ_PHASE_INTERPRET);
1272 spin_unlock(&imp->imp_lock);
1273 GOTO(interpret, req->rq_status);
1276 list_del_init(&req->rq_list);
1277 list_add_tail(&req->rq_list,
1278 &imp->imp_sending_list);
1280 spin_unlock(&imp->imp_lock);
1282 req->rq_waiting = 0;
1284 if (req->rq_timedout||req->rq_resend) {
1285 /* This is re-sending anyways,
1286 * let's mark req as resend. */
1291 if (!ptlrpc_unregister_bulk(req, 1))
1294 /* ensure previous bulk fails */
1295 old_xid = req->rq_xid;
1296 req->rq_xid = ptlrpc_next_xid();
1297 CDEBUG(D_HA, "resend bulk "
1300 old_xid, req->rq_xid);
1304 * rq_wait_ctx is only touched by ptlrpcd,
1305 * so no lock is needed here.
1307 status = sptlrpc_req_refresh_ctx(req, -1);
1310 req->rq_status = status;
1311 req->rq_wait_ctx = 0;
1312 force_timer_recalc = 1;
1314 req->rq_wait_ctx = 1;
1319 req->rq_wait_ctx = 0;
1322 rc = ptl_send_rpc(req, 0);
1324 DEBUG_REQ(D_HA, req, "send failed (%d)",
1326 force_timer_recalc = 1;
1327 req->rq_net_err = 1;
1329 /* need to reset the timeout */
1330 force_timer_recalc = 1;
1333 spin_lock(&req->rq_lock);
1335 if (ptlrpc_client_early(req)) {
1336 ptlrpc_at_recv_early_reply(req);
1337 spin_unlock(&req->rq_lock);
1341 /* Still waiting for a reply? */
1342 if (ptlrpc_client_recv(req)) {
1343 spin_unlock(&req->rq_lock);
1347 /* Did we actually receive a reply? */
1348 if (!ptlrpc_client_replied(req)) {
1349 spin_unlock(&req->rq_lock);
1353 spin_unlock(&req->rq_lock);
1355 req->rq_status = after_reply(req);
1359 /* If there is no bulk associated with this request,
1360 * then we're done and should let the interpreter
1361 * process the reply. Similarly if the RPC returned
1362 * an error, and therefore the bulk will never arrive.
1364 if (req->rq_bulk == NULL || req->rq_status != 0) {
1365 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1366 GOTO(interpret, req->rq_status);
1369 ptlrpc_rqphase_move(req, RQ_PHASE_BULK);
1372 LASSERT(req->rq_phase == RQ_PHASE_BULK);
1373 if (ptlrpc_client_bulk_active(req))
1376 if (!req->rq_bulk->bd_success) {
1377 /* The RPC reply arrived OK, but the bulk screwed
1378 * up! Dead wierd since the server told us the RPC
1379 * was good after getting the REPLY for her GET or
1380 * the ACK for her PUT. */
1381 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1385 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1388 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
1390 /* This moves to "unregistering" phase we need to wait for
1392 if (!ptlrpc_unregister_reply(req, 1))
1395 if (!ptlrpc_unregister_bulk(req, 1))
1398 /* When calling interpret receiving already should be
1400 LASSERT(!req->rq_receiving_reply);
1402 if (req->rq_interpret_reply != NULL) {
1403 ptlrpc_interpterer_t interpreter =
1404 req->rq_interpret_reply;
1405 req->rq_status = interpreter(env, req,
1406 &req->rq_async_args,
1409 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
1411 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
1412 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1413 imp->imp_obd->obd_uuid.uuid,
1414 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1415 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1416 lustre_msg_get_opc(req->rq_reqmsg));
1418 spin_lock(&imp->imp_lock);
1419 /* Request already may be not on sending or delaying list. This
1420 * may happen in the case of marking it errorneous for the case
1421 * ptlrpc_import_delay_req(req, status) find it impossible to
1422 * allow sending this rpc and returns *status != 0. */
1423 if (!list_empty(&req->rq_list)) {
1424 list_del_init(&req->rq_list);
1425 atomic_dec(&imp->imp_inflight);
1427 spin_unlock(&imp->imp_lock);
1429 set->set_remaining--;
1430 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1433 /* If we hit an error, we want to recover promptly. */
1434 RETURN(set->set_remaining == 0 || force_timer_recalc);
1437 /* Return 1 if we should give up, else 0 */
1438 int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
1440 struct obd_import *imp = req->rq_import;
1444 DEBUG_REQ(D_ERROR|D_NETERROR, req,
1445 "%s (sent at "CFS_TIME_T", "CFS_DURATION_T"s ago)",
1446 req->rq_net_err ? "network error" : "timeout",
1447 req->rq_sent, cfs_time_sub(cfs_time_current_sec(),
1451 LCONSOLE_WARN("Request x"LPU64" sent from %s to NID %s "
1452 CFS_DURATION_T"s ago has timed out "
1453 "(limit "CFS_DURATION_T"s).\n", req->rq_xid,
1454 req->rq_import->imp_obd->obd_name,
1455 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1456 cfs_time_sub(cfs_time_current_sec(), req->rq_sent),
1457 cfs_time_sub(req->rq_deadline, req->rq_sent));
1460 if (imp != NULL && obd_debug_peer_on_timeout)
1461 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
1463 spin_lock(&req->rq_lock);
1464 req->rq_timedout = 1;
1465 spin_unlock(&req->rq_lock);
1467 ptlrpc_unregister_reply(req, async_unlink);
1468 ptlrpc_unregister_bulk(req, async_unlink);
1470 if (obd_dump_on_timeout)
1471 libcfs_debug_dumplog();
1474 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
1478 /* The DLM server doesn't want recovery run on its imports. */
1479 if (imp->imp_dlm_fake)
1482 /* If this request is for recovery or other primordial tasks,
1483 * then error it out here. */
1484 if (req->rq_ctx_init || req->rq_ctx_fini ||
1485 req->rq_send_state != LUSTRE_IMP_FULL ||
1486 imp->imp_obd->obd_no_recov) {
1487 DEBUG_REQ(D_RPCTRACE, req, "err -110, sent_state=%s (now=%s)",
1488 ptlrpc_import_state_name(req->rq_send_state),
1489 ptlrpc_import_state_name(imp->imp_state));
1490 spin_lock(&req->rq_lock);
1491 req->rq_status = -ETIMEDOUT;
1493 spin_unlock(&req->rq_lock);
1497 /* if a request can't be resent we can't wait for an answer after
1499 if (req->rq_no_resend) {
1500 DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
1504 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
1509 int ptlrpc_expired_set(void *data)
1511 struct ptlrpc_request_set *set = data;
1512 struct list_head *tmp;
1513 time_t now = cfs_time_current_sec();
1516 LASSERT(set != NULL);
1519 * A timeout expired. See which reqs it applies to...
1521 list_for_each (tmp, &set->set_requests) {
1522 struct ptlrpc_request *req =
1523 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1525 /* don't expire request waiting for context */
1526 if (req->rq_wait_ctx)
1529 /* Request in-flight? */
1530 if (!((req->rq_phase == RQ_PHASE_RPC &&
1531 !req->rq_waiting && !req->rq_resend) ||
1532 (req->rq_phase == RQ_PHASE_BULK)))
1535 if (req->rq_timedout || /* already dealt with */
1536 req->rq_deadline > now) /* not expired */
1539 /* Deal with this guy. Do it asynchronously to not block
1540 * ptlrpcd thread. */
1541 ptlrpc_expire_one_request(req, 1);
1545 * When waiting for a whole set, we always to break out of the
1546 * sleep so we can recalculate the timeout, or enable interrupts
1547 * if everyone's timed out.
1552 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1554 spin_lock(&req->rq_lock);
1556 spin_unlock(&req->rq_lock);
1559 void ptlrpc_interrupted_set(void *data)
1561 struct ptlrpc_request_set *set = data;
1562 struct list_head *tmp;
1564 LASSERT(set != NULL);
1565 CERROR("INTERRUPTED SET %p\n", set);
1567 list_for_each(tmp, &set->set_requests) {
1568 struct ptlrpc_request *req =
1569 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1571 if (req->rq_phase != RQ_PHASE_RPC &&
1572 req->rq_phase != RQ_PHASE_UNREGISTERING)
1575 ptlrpc_mark_interrupted(req);
1580 * Get the smallest timeout in the set; this does NOT set a timeout.
1582 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1584 struct list_head *tmp;
1585 time_t now = cfs_time_current_sec();
1587 struct ptlrpc_request *req;
1591 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1593 list_for_each(tmp, &set->set_requests) {
1594 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1597 * Request in-flight?
1599 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
1600 (req->rq_phase == RQ_PHASE_BULK) ||
1601 (req->rq_phase == RQ_PHASE_NEW)))
1605 * Already timed out.
1607 if (req->rq_timedout)
1613 if (req->rq_wait_ctx)
1616 if (req->rq_phase == RQ_PHASE_NEW)
1617 deadline = req->rq_sent;
1619 deadline = req->rq_sent + req->rq_timeout;
1621 if (deadline <= now) /* actually expired already */
1622 timeout = 1; /* ASAP */
1623 else if (timeout == 0 || timeout > deadline - now)
1624 timeout = deadline - now;
1629 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1631 struct list_head *tmp;
1632 struct ptlrpc_request *req;
1633 struct l_wait_info lwi;
1637 if (list_empty(&set->set_requests))
1640 list_for_each(tmp, &set->set_requests) {
1641 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1642 if (req->rq_phase == RQ_PHASE_NEW)
1643 (void)ptlrpc_send_new_req(req);
1647 timeout = ptlrpc_set_next_timeout(set);
1649 /* wait until all complete, interrupted, or an in-flight
1651 CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
1653 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
1655 ptlrpc_interrupted_set, set);
1656 rc = l_wait_event(set->set_waitq,
1657 ptlrpc_check_set(NULL, set), &lwi);
1659 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1661 /* -EINTR => all requests have been flagged rq_intr so next
1663 * -ETIMEOUTD => someone timed out. When all reqs have
1664 * timed out, signals are enabled allowing completion with
1666 * I don't really care if we go once more round the loop in
1667 * the error cases -eeb. */
1668 } while (rc != 0 || set->set_remaining != 0);
1670 LASSERT(set->set_remaining == 0);
1673 list_for_each(tmp, &set->set_requests) {
1674 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1676 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1677 if (req->rq_status != 0)
1678 rc = req->rq_status;
1681 if (set->set_interpret != NULL) {
1682 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1684 rc = interpreter (set, set->set_arg, rc);
1686 struct ptlrpc_set_cbdata *cbdata, *n;
1689 list_for_each_entry_safe(cbdata, n,
1690 &set->set_cblist, psc_item) {
1691 list_del_init(&cbdata->psc_item);
1692 err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
1695 OBD_FREE_PTR(cbdata);
1702 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1705 if (request == NULL) {
1710 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1711 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1712 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1713 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1714 LASSERTF(list_empty(&request->rq_exp_list), "req %p\n", request);
1715 LASSERTF(!request->rq_replay, "req %p\n", request);
1716 LASSERT(request->rq_cli_ctx);
1718 req_capsule_fini(&request->rq_pill);
1720 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1721 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1722 if (request->rq_import != NULL) {
1724 spin_lock(&request->rq_import->imp_lock);
1725 list_del_init(&request->rq_mod_list);
1726 list_del_init(&request->rq_replay_list);
1728 spin_unlock(&request->rq_import->imp_lock);
1730 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1732 if (atomic_read(&request->rq_refcount) != 0) {
1733 DEBUG_REQ(D_ERROR, request,
1734 "freeing request with nonzero refcount");
1738 if (request->rq_repbuf != NULL)
1739 sptlrpc_cli_free_repbuf(request);
1740 if (request->rq_export != NULL) {
1741 class_export_put(request->rq_export);
1742 request->rq_export = NULL;
1744 if (request->rq_import != NULL) {
1745 class_import_put(request->rq_import);
1746 request->rq_import = NULL;
1748 if (request->rq_bulk != NULL)
1749 ptlrpc_free_bulk(request->rq_bulk);
1751 if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
1752 sptlrpc_cli_free_reqbuf(request);
1754 sptlrpc_req_put_ctx(request, !locked);
1756 if (request->rq_pool)
1757 __ptlrpc_free_req_to_pool(request);
1759 OBD_FREE(request, sizeof(*request));
1763 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1764 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1766 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1767 (void)__ptlrpc_req_finished(request, 1);
1770 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1773 if (request == NULL)
1776 if (request == LP_POISON ||
1777 request->rq_reqmsg == LP_POISON) {
1778 CERROR("dereferencing freed request (bug 575)\n");
1783 DEBUG_REQ(D_INFO, request, "refcount now %u",
1784 atomic_read(&request->rq_refcount) - 1);
1786 if (atomic_dec_and_test(&request->rq_refcount)) {
1787 __ptlrpc_free_req(request, locked);
1794 void ptlrpc_req_finished(struct ptlrpc_request *request)
1796 __ptlrpc_req_finished(request, 0);
1799 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1801 return request->rq_xid;
1803 EXPORT_SYMBOL(ptlrpc_req_xid);
1805 /* Disengage the client's reply buffer from the network
1806 * NB does _NOT_ unregister any client-side bulk.
1807 * IDEMPOTENT, but _not_ safe against concurrent callers.
1808 * The request owner (i.e. the thread doing the I/O) must call...
1810 int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async)
1814 struct l_wait_info lwi;
1819 LASSERT(!in_interrupt());
1822 * Let's setup deadline for reply unlink.
1824 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1825 async && request->rq_reply_deadline == 0)
1826 request->rq_reply_deadline = cfs_time_current_sec()+LONG_UNLINK;
1829 * Nothing left to do.
1831 if (!ptlrpc_client_recv_or_unlink(request))
1834 LNetMDUnlink(request->rq_reply_md_h);
1837 * Let's check it once again.
1839 if (!ptlrpc_client_recv_or_unlink(request))
1843 * Move to "Unregistering" phase as reply was not unlinked yet.
1845 ptlrpc_rqphase_move(request, RQ_PHASE_UNREGISTERING);
1848 * Do not wait for unlink to finish.
1854 * We have to l_wait_event() whatever the result, to give liblustre
1855 * a chance to run reply_in_callback(), and to make sure we've
1856 * unlinked before returning a req to the pool.
1858 if (request->rq_set != NULL)
1859 wq = &request->rq_set->set_waitq;
1861 wq = &request->rq_reply_waitq;
1864 /* Network access will complete in finite time but the HUGE
1865 * timeout lets us CWARN for visibility of sluggish NALs */
1866 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK),
1867 cfs_time_seconds(1), NULL, NULL);
1868 rc = l_wait_event(*wq, !ptlrpc_client_recv_or_unlink(request),
1871 ptlrpc_rqphase_move(request, request->rq_next_phase);
1875 LASSERT(rc == -ETIMEDOUT);
1876 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout "
1877 "rvcng=%d unlnk=%d", request->rq_receiving_reply,
1878 request->rq_must_unlink);
1883 /* caller must hold imp->imp_lock */
1884 void ptlrpc_free_committed(struct obd_import *imp)
1886 struct list_head *tmp, *saved;
1887 struct ptlrpc_request *req;
1888 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1891 LASSERT(imp != NULL);
1893 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1896 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1897 imp->imp_generation == imp->imp_last_generation_checked) {
1898 CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
1899 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1903 CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
1904 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1905 imp->imp_generation);
1906 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1907 imp->imp_last_generation_checked = imp->imp_generation;
1909 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1910 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1912 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1913 LASSERT(req != last_req);
1916 if (req->rq_transno == 0) {
1917 DEBUG_REQ(D_EMERG, req, "zero transno during replay");
1920 if (req->rq_import_generation < imp->imp_generation) {
1921 DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
1925 if (req->rq_replay) {
1926 DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
1930 /* not yet committed */
1931 if (req->rq_transno > imp->imp_peer_committed_transno) {
1932 DEBUG_REQ(D_RPCTRACE, req, "stopping search");
1936 DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
1937 imp->imp_peer_committed_transno);
1939 spin_lock(&req->rq_lock);
1941 spin_unlock(&req->rq_lock);
1942 if (req->rq_commit_cb != NULL)
1943 req->rq_commit_cb(req);
1944 list_del_init(&req->rq_replay_list);
1945 __ptlrpc_req_finished(req, 1);
1952 void ptlrpc_cleanup_client(struct obd_import *imp)
1959 void ptlrpc_resend_req(struct ptlrpc_request *req)
1961 DEBUG_REQ(D_HA, req, "going to resend");
1962 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
1963 req->rq_status = -EAGAIN;
1965 spin_lock(&req->rq_lock);
1967 req->rq_net_err = 0;
1968 req->rq_timedout = 0;
1970 __u64 old_xid = req->rq_xid;
1972 /* ensure previous bulk fails */
1973 req->rq_xid = ptlrpc_next_xid();
1974 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1975 old_xid, req->rq_xid);
1977 ptlrpc_client_wake_req(req);
1978 spin_unlock(&req->rq_lock);
1981 /* XXX: this function and rq_status are currently unused */
1982 void ptlrpc_restart_req(struct ptlrpc_request *req)
1984 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1985 req->rq_status = -ERESTARTSYS;
1987 spin_lock(&req->rq_lock);
1988 req->rq_restart = 1;
1989 req->rq_timedout = 0;
1990 ptlrpc_client_wake_req(req);
1991 spin_unlock(&req->rq_lock);
1994 static int expired_request(void *data)
1996 struct ptlrpc_request *req = data;
2000 * Some failure can suspend regular timeouts.
2002 if (ptlrpc_check_suspend())
2006 * Deadline may have changed with an early reply.
2008 if (req->rq_deadline > cfs_time_current_sec())
2011 RETURN(ptlrpc_expire_one_request(req, 0));
2014 static void interrupted_request(void *data)
2016 struct ptlrpc_request *req = data;
2017 DEBUG_REQ(D_HA, req, "request interrupted");
2018 spin_lock(&req->rq_lock);
2020 spin_unlock(&req->rq_lock);
2023 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
2026 atomic_inc(&req->rq_refcount);
2030 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
2031 struct obd_import *imp)
2033 struct list_head *tmp;
2035 LASSERT_SPIN_LOCKED(&imp->imp_lock);
2037 if (req->rq_transno == 0) {
2038 DEBUG_REQ(D_EMERG, req, "saving request with zero transno");
2042 /* clear this for new requests that were resent as well
2043 as resent replayed requests. */
2044 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2046 /* don't re-add requests that have been replayed */
2047 if (!list_empty(&req->rq_replay_list))
2050 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
2052 LASSERT(imp->imp_replayable);
2053 /* Balanced in ptlrpc_free_committed, usually. */
2054 ptlrpc_request_addref(req);
2055 list_for_each_prev(tmp, &imp->imp_replay_list) {
2056 struct ptlrpc_request *iter =
2057 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
2059 /* We may have duplicate transnos if we create and then
2060 * open a file, or for closes retained if to match creating
2061 * opens, so use req->rq_xid as a secondary key.
2062 * (See bugs 684, 685, and 428.)
2063 * XXX no longer needed, but all opens need transnos!
2065 if (iter->rq_transno > req->rq_transno)
2068 if (iter->rq_transno == req->rq_transno) {
2069 LASSERT(iter->rq_xid != req->rq_xid);
2070 if (iter->rq_xid > req->rq_xid)
2074 list_add(&req->rq_replay_list, &iter->rq_replay_list);
2078 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
2081 int ptlrpc_queue_wait(struct ptlrpc_request *req)
2085 struct l_wait_info lwi;
2086 struct obd_import *imp = req->rq_import;
2087 cfs_duration_t timeout = CFS_TICK;
2091 LASSERT(req->rq_set == NULL);
2092 LASSERT(!req->rq_receiving_reply);
2094 /* for distributed debugging */
2095 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
2096 LASSERT(imp->imp_obd != NULL);
2097 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
2098 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
2099 imp->imp_obd->obd_uuid.uuid,
2100 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
2101 libcfs_nid2str(imp->imp_connection->c_peer.nid),
2102 lustre_msg_get_opc(req->rq_reqmsg));
2104 /* Mark phase here for a little debug help */
2105 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
2107 spin_lock(&imp->imp_lock);
2108 req->rq_import_generation = imp->imp_generation;
2110 if (ptlrpc_import_delay_req(imp, req, &rc)) {
2111 list_del_init(&req->rq_list);
2112 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
2113 atomic_inc(&imp->imp_inflight);
2114 spin_unlock(&imp->imp_lock);
2116 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
2118 ptlrpc_import_state_name(req->rq_send_state),
2119 ptlrpc_import_state_name(imp->imp_state));
2120 lwi = LWI_INTR(interrupted_request, req);
2121 rc = l_wait_event(req->rq_reply_waitq,
2122 (req->rq_send_state == imp->imp_state ||
2123 req->rq_err || req->rq_intr),
2125 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
2127 ptlrpc_import_state_name(imp->imp_state),
2128 ptlrpc_import_state_name(req->rq_send_state),
2129 req->rq_err, req->rq_intr);
2131 spin_lock(&imp->imp_lock);
2132 list_del_init(&req->rq_list);
2133 atomic_dec(&imp->imp_inflight);
2136 /* rq_status was set locally */
2139 else if (req->rq_intr) {
2142 else if (req->rq_no_resend) {
2143 spin_unlock(&imp->imp_lock);
2144 GOTO(out, rc = -ETIMEDOUT);
2152 spin_unlock(&imp->imp_lock);
2153 req->rq_status = rc; // XXX this ok?
2157 if (req->rq_resend) {
2158 if (req->rq_bulk != NULL) {
2159 ptlrpc_unregister_bulk(req, 0);
2161 /* bulk requests are supposed to be
2162 * idempotent, so we are free to bump the xid
2163 * here, which we need to do before
2164 * registering the bulk again (bug 6371).
2165 * print the old xid first for sanity.
2167 DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
2168 req->rq_xid = ptlrpc_next_xid();
2171 DEBUG_REQ(D_HA, req, "resending: ");
2174 /* XXX this is the same as ptlrpc_set_wait */
2175 LASSERT(list_empty(&req->rq_list));
2176 list_add_tail(&req->rq_list, &imp->imp_sending_list);
2177 atomic_inc(&imp->imp_inflight);
2178 spin_unlock(&imp->imp_lock);
2180 rc = sptlrpc_req_refresh_ctx(req, 0);
2183 /* we got fatal ctx refresh error, directly jump out
2184 * thus we can pass back the actual error code.
2186 spin_lock(&imp->imp_lock);
2187 list_del_init(&req->rq_list);
2188 atomic_dec(&imp->imp_inflight);
2189 spin_unlock(&imp->imp_lock);
2191 CERROR("Failed to refresh ctx of req %p: %d\n",
2195 /* simulating we got error during send rpc */
2199 rc = ptl_send_rpc(req, 0);
2201 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
2203 timeoutl = req->rq_deadline - cfs_time_current_sec();
2204 timeout = (timeoutl <= 0 || rc) ? CFS_TICK :
2205 cfs_time_seconds(timeoutl);
2206 DEBUG_REQ(D_NET, req,
2207 "-- sleeping for "CFS_DURATION_T" ticks", timeout);
2208 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
2210 brc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
2211 if (brc == -ETIMEDOUT && ((req->rq_deadline > cfs_time_current_sec()) ||
2212 ptlrpc_check_and_wait_suspend(req)))
2216 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
2217 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
2218 imp->imp_obd->obd_uuid.uuid,
2219 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
2220 libcfs_nid2str(imp->imp_connection->c_peer.nid),
2221 lustre_msg_get_opc(req->rq_reqmsg));
2223 /* If the reply was received normally, this just grabs the spinlock
2224 * (ensuring the reply callback has returned), sees that
2225 * req->rq_receiving_reply is clear and returns. */
2226 ptlrpc_unregister_reply(req, 0);
2228 spin_lock(&imp->imp_lock);
2229 list_del_init(&req->rq_list);
2230 atomic_dec(&imp->imp_inflight);
2231 spin_unlock(&imp->imp_lock);
2234 DEBUG_REQ(D_RPCTRACE, req, "err rc=%d status=%d",
2235 rc, req->rq_status);
2236 GOTO(out, rc = rc ? rc : -EIO);
2240 /* Should only be interrupted if we timed out. */
2241 if (!req->rq_timedout)
2242 DEBUG_REQ(D_ERROR, req,
2243 "rq_intr set but rq_timedout not");
2244 GOTO(out, rc = -EINTR);
2247 /* Resend if we need to */
2248 if (req->rq_resend||req->rq_timedout) {
2249 /* ...unless we were specifically told otherwise. */
2250 if (req->rq_no_resend)
2251 GOTO(out, rc = -ETIMEDOUT);
2252 spin_lock(&imp->imp_lock);
2253 /* we can have rq_timeout on dlm fake import which not support
2254 * recovery - but me need resend request on this import instead
2255 * of return error */
2260 if (!ptlrpc_client_replied(req)) {
2261 /* How can this be? -eeb */
2262 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
2264 GOTO(out, rc = req->rq_status);
2267 rc = after_reply(req);
2268 /* NB may return +ve success rc */
2269 if (req->rq_resend) {
2270 spin_lock(&imp->imp_lock);
2275 if (req->rq_bulk != NULL) {
2277 /* success so far. Note that anything going wrong
2278 * with bulk now, is EXTREMELY strange, since the
2279 * server must have believed that the bulk
2280 * tranferred OK before she replied with success to
2282 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
2283 brc = l_wait_event(req->rq_reply_waitq,
2284 !ptlrpc_client_bulk_active(req),
2286 LASSERT(brc == 0 || brc == -ETIMEDOUT);
2288 LASSERT(brc == -ETIMEDOUT);
2289 DEBUG_REQ(D_ERROR, req, "bulk timed out");
2291 } else if (!req->rq_bulk->bd_success) {
2292 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
2297 ptlrpc_unregister_bulk(req, 0);
2300 LASSERT(!req->rq_receiving_reply);
2301 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
2302 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
2306 struct ptlrpc_replay_async_args {
2308 int praa_old_status;
2311 static int ptlrpc_replay_interpret(const struct lu_env *env,
2312 struct ptlrpc_request *req,
2313 void * data, int rc)
2315 struct ptlrpc_replay_async_args *aa = data;
2316 struct obd_import *imp = req->rq_import;
2319 atomic_dec(&imp->imp_replay_inflight);
2321 if (!ptlrpc_client_replied(req)) {
2322 CERROR("request replay timed out, restarting recovery\n");
2323 GOTO(out, rc = -ETIMEDOUT);
2326 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
2327 (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
2328 lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
2329 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
2331 /* The transno had better not change over replay. */
2332 LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
2333 lustre_msg_get_transno(req->rq_repmsg));
2335 DEBUG_REQ(D_HA, req, "got rep");
2337 /* let the callback do fixups, possibly including in the request */
2338 if (req->rq_replay_cb)
2339 req->rq_replay_cb(req);
2341 if (ptlrpc_client_replied(req) &&
2342 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
2343 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
2344 lustre_msg_get_status(req->rq_repmsg),
2345 aa->praa_old_status);
2347 /* Put it back for re-replay. */
2348 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
2352 * Errors while replay can set transno to 0, but
2353 * imp_last_replay_transno shouldn't be set to 0 anyway
2355 if (req->rq_transno > 0) {
2356 spin_lock(&imp->imp_lock);
2357 LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
2358 imp->imp_last_replay_transno = req->rq_transno;
2359 spin_unlock(&imp->imp_lock);
2361 CERROR("Transno is 0 during replay!\n");
2362 /* continue with recovery */
2363 rc = ptlrpc_import_recovery_state_machine(imp);
2365 req->rq_send_state = aa->praa_old_state;
2368 /* this replay failed, so restart recovery */
2369 ptlrpc_connect_import(imp, NULL);
2374 int ptlrpc_replay_req(struct ptlrpc_request *req)
2376 struct ptlrpc_replay_async_args *aa;
2379 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
2380 /* Not handling automatic bulk replay yet (or ever?) */
2381 LASSERT(req->rq_bulk == NULL);
2383 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
2384 aa = ptlrpc_req_async_args(req);
2385 memset(aa, 0, sizeof *aa);
2387 /* Prepare request to be resent with ptlrpcd */
2388 aa->praa_old_state = req->rq_send_state;
2389 req->rq_send_state = LUSTRE_IMP_REPLAY;
2390 req->rq_phase = RQ_PHASE_NEW;
2391 req->rq_next_phase = RQ_PHASE_UNDEFINED;
2393 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
2395 req->rq_interpret_reply = ptlrpc_replay_interpret;
2396 /* Readjust the timeout for current conditions */
2397 ptlrpc_at_set_req_timeout(req);
2399 DEBUG_REQ(D_HA, req, "REPLAY");
2401 atomic_inc(&req->rq_import->imp_replay_inflight);
2402 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
2404 ptlrpcd_add_req(req, PSCOPE_OTHER);
2408 void ptlrpc_abort_inflight(struct obd_import *imp)
2410 struct list_head *tmp, *n;
2413 /* Make sure that no new requests get processed for this import.
2414 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
2415 * this flag and then putting requests on sending_list or delayed_list.
2417 spin_lock(&imp->imp_lock);
2419 /* XXX locking? Maybe we should remove each request with the list
2420 * locked? Also, how do we know if the requests on the list are
2421 * being freed at this time?
2423 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
2424 struct ptlrpc_request *req =
2425 list_entry(tmp, struct ptlrpc_request, rq_list);
2427 DEBUG_REQ(D_RPCTRACE, req, "inflight");
2429 spin_lock (&req->rq_lock);
2430 if (req->rq_import_generation < imp->imp_generation) {
2432 req->rq_status = -EINTR;
2433 ptlrpc_client_wake_req(req);
2435 spin_unlock (&req->rq_lock);
2438 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
2439 struct ptlrpc_request *req =
2440 list_entry(tmp, struct ptlrpc_request, rq_list);
2442 DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
2444 spin_lock (&req->rq_lock);
2445 if (req->rq_import_generation < imp->imp_generation) {
2447 req->rq_status = -EINTR;
2448 ptlrpc_client_wake_req(req);
2450 spin_unlock (&req->rq_lock);
2453 /* Last chance to free reqs left on the replay list, but we
2454 * will still leak reqs that haven't committed. */
2455 if (imp->imp_replayable)
2456 ptlrpc_free_committed(imp);
2458 spin_unlock(&imp->imp_lock);
2463 void ptlrpc_abort_set(struct ptlrpc_request_set *set)
2465 struct list_head *tmp, *pos;
2467 LASSERT(set != NULL);
2469 list_for_each_safe(pos, tmp, &set->set_requests) {
2470 struct ptlrpc_request *req =
2471 list_entry(pos, struct ptlrpc_request, rq_set_chain);
2473 spin_lock(&req->rq_lock);
2474 if (req->rq_phase != RQ_PHASE_RPC) {
2475 spin_unlock(&req->rq_lock);
2480 req->rq_status = -EINTR;
2481 ptlrpc_client_wake_req(req);
2482 spin_unlock(&req->rq_lock);
2486 static __u64 ptlrpc_last_xid;
2487 static spinlock_t ptlrpc_last_xid_lock;
2489 /* Initialize the XID for the node. This is common among all requests on
2490 * this node, and only requires the property that it is monotonically
2491 * increasing. It does not need to be sequential. Since this is also used
2492 * as the RDMA match bits, it is important that a single client NOT have
2493 * the same match bits for two different in-flight requests, hence we do
2494 * NOT want to have an XID per target or similar.
2496 * To avoid an unlikely collision between match bits after a client reboot
2497 * (which would deliver old data into the wrong RDMA buffer) initialize
2498 * the XID based on the current time, assuming a maximum RPC rate of 1M RPC/s.
2499 * If the time is clearly incorrect, we instead use a 62-bit random number.
2500 * In the worst case the random number will overflow 1M RPCs per second in
2501 * 9133 years, or permutations thereof.
2503 #define YEAR_2004 (1ULL << 30)
2504 void ptlrpc_init_xid(void)
2506 time_t now = cfs_time_current_sec();
2508 spin_lock_init(&ptlrpc_last_xid_lock);
2509 if (now < YEAR_2004) {
2510 ll_get_random_bytes(&ptlrpc_last_xid, sizeof(ptlrpc_last_xid));
2511 ptlrpc_last_xid >>= 2;
2512 ptlrpc_last_xid |= (1ULL << 61);
2514 ptlrpc_last_xid = (__u64)now << 20;
2518 __u64 ptlrpc_next_xid(void)
2521 spin_lock(&ptlrpc_last_xid_lock);
2522 tmp = ++ptlrpc_last_xid;
2523 spin_unlock(&ptlrpc_last_xid_lock);
2527 __u64 ptlrpc_sample_next_xid(void)
2529 #if BITS_PER_LONG == 32
2530 /* need to avoid possible word tearing on 32-bit systems */
2532 spin_lock(&ptlrpc_last_xid_lock);
2533 tmp = ptlrpc_last_xid + 1;
2534 spin_unlock(&ptlrpc_last_xid_lock);
2537 /* No need to lock, since returned value is racy anyways */
2538 return ptlrpc_last_xid + 1;
2541 EXPORT_SYMBOL(ptlrpc_sample_next_xid);