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_waitq_init(&request->rq_reply_waitq);
542 request->rq_xid = ptlrpc_next_xid();
543 atomic_set(&request->rq_refcount, 1);
545 lustre_msg_set_opc(request->rq_reqmsg, opcode);
549 sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
551 class_import_put(imp);
555 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
556 __u32 version, int opcode, char **bufs,
557 struct ptlrpc_cli_ctx *ctx)
561 count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
562 return __ptlrpc_request_bufs_pack(request, version, opcode, count,
563 request->rq_pill.rc_area[RCL_CLIENT],
566 EXPORT_SYMBOL(ptlrpc_request_bufs_pack);
568 int ptlrpc_request_pack(struct ptlrpc_request *request,
569 __u32 version, int opcode)
571 return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
575 struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
576 struct ptlrpc_request_pool *pool)
578 struct ptlrpc_request *request = NULL;
581 request = ptlrpc_prep_req_from_pool(pool);
584 OBD_ALLOC_PTR(request);
587 LASSERTF((unsigned long)imp > 0x1000, "%p", imp);
588 LASSERT(imp != LP_POISON);
589 LASSERTF((unsigned long)imp->imp_client > 0x1000, "%p",
591 LASSERT(imp->imp_client != LP_POISON);
593 request->rq_import = class_import_get(imp);
595 CERROR("request allocation out of memory\n");
601 static struct ptlrpc_request *
602 ptlrpc_request_alloc_internal(struct obd_import *imp,
603 struct ptlrpc_request_pool * pool,
604 const struct req_format *format)
606 struct ptlrpc_request *request;
608 request = __ptlrpc_request_alloc(imp, pool);
612 req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
613 req_capsule_set(&request->rq_pill, format);
617 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
618 const struct req_format *format)
620 return ptlrpc_request_alloc_internal(imp, NULL, format);
623 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
624 struct ptlrpc_request_pool * pool,
625 const struct req_format *format)
627 return ptlrpc_request_alloc_internal(imp, pool, format);
630 void ptlrpc_request_free(struct ptlrpc_request *request)
632 if (request->rq_pool)
633 __ptlrpc_free_req_to_pool(request);
635 OBD_FREE_PTR(request);
638 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
639 const struct req_format *format,
640 __u32 version, int opcode)
642 struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
646 rc = ptlrpc_request_pack(req, version, opcode);
648 ptlrpc_request_free(req);
655 struct ptlrpc_request *
656 ptlrpc_prep_req_pool(struct obd_import *imp,
657 __u32 version, int opcode,
658 int count, __u32 *lengths, char **bufs,
659 struct ptlrpc_request_pool *pool)
661 struct ptlrpc_request *request;
664 request = __ptlrpc_request_alloc(imp, pool);
668 rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
669 lengths, bufs, NULL);
671 ptlrpc_request_free(request);
677 struct ptlrpc_request *
678 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
679 __u32 *lengths, char **bufs)
681 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
685 struct ptlrpc_request_set *ptlrpc_prep_set(void)
687 struct ptlrpc_request_set *set;
690 OBD_ALLOC(set, sizeof *set);
693 CFS_INIT_LIST_HEAD(&set->set_requests);
694 cfs_waitq_init(&set->set_waitq);
695 set->set_remaining = 0;
696 spin_lock_init(&set->set_new_req_lock);
697 CFS_INIT_LIST_HEAD(&set->set_new_requests);
698 CFS_INIT_LIST_HEAD(&set->set_cblist);
703 /* Finish with this set; opposite of prep_set. */
704 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
706 struct list_head *tmp;
707 struct list_head *next;
712 /* Requests on the set should either all be completed, or all be new */
713 expected_phase = (set->set_remaining == 0) ?
714 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
715 list_for_each (tmp, &set->set_requests) {
716 struct ptlrpc_request *req =
717 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
719 LASSERT(req->rq_phase == expected_phase);
723 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
725 list_for_each_safe(tmp, next, &set->set_requests) {
726 struct ptlrpc_request *req =
727 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
728 list_del_init(&req->rq_set_chain);
730 LASSERT(req->rq_phase == expected_phase);
732 if (req->rq_phase == RQ_PHASE_NEW) {
734 if (req->rq_interpret_reply != NULL) {
735 ptlrpc_interpterer_t interpreter =
736 req->rq_interpret_reply;
738 /* higher level (i.e. LOV) failed;
739 * let the sub reqs clean up */
740 req->rq_status = -EBADR;
741 interpreter(NULL, req, &req->rq_async_args,
744 set->set_remaining--;
748 ptlrpc_req_finished (req);
751 LASSERT(set->set_remaining == 0);
753 OBD_FREE(set, sizeof(*set));
757 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
758 set_interpreter_func fn, void *data)
760 struct ptlrpc_set_cbdata *cbdata;
762 OBD_ALLOC_PTR(cbdata);
766 cbdata->psc_interpret = fn;
767 cbdata->psc_data = data;
768 list_add_tail(&cbdata->psc_item, &set->set_cblist);
773 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
774 struct ptlrpc_request *req)
776 /* The set takes over the caller's request reference */
777 list_add_tail(&req->rq_set_chain, &set->set_requests);
779 set->set_remaining++;
783 * Lock so many callers can add things, the context that owns the set
784 * is supposed to notice these and move them into the set proper.
786 int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
787 struct ptlrpc_request *req)
789 struct ptlrpc_request_set *set = pc->pc_set;
792 * Let caller know that we stopped and will not handle this request.
793 * It needs to take care itself of request.
795 if (test_bit(LIOD_STOP, &pc->pc_flags))
798 spin_lock(&set->set_new_req_lock);
800 * The set takes over the caller's request reference.
802 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
804 spin_unlock(&set->set_new_req_lock);
807 * Let thead know that we added something and better it to wake up
810 cfs_waitq_signal(&set->set_waitq);
815 * Based on the current state of the import, determine if the request
816 * can be sent, is an error, or should be delayed.
818 * Returns true if this request should be delayed. If false, and
819 * *status is set, then the request can not be sent and *status is the
820 * error code. If false and status is 0, then request can be sent.
822 * The imp->imp_lock must be held.
824 static int ptlrpc_import_delay_req(struct obd_import *imp,
825 struct ptlrpc_request *req, int *status)
830 LASSERT (status != NULL);
833 if (req->rq_ctx_init || req->rq_ctx_fini) {
834 /* always allow ctx init/fini rpc go through */
835 } else if (imp->imp_state == LUSTRE_IMP_NEW) {
836 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
839 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
840 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
842 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
843 imp->imp_state == LUSTRE_IMP_CONNECTING) {
844 /* allow CONNECT even if import is invalid */ ;
845 if (atomic_read(&imp->imp_inval_count) != 0) {
846 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
849 } else if ((imp->imp_invalid && (!imp->imp_recon_bk)) ||
850 imp->imp_obd->obd_no_recov) {
851 /* If the import has been invalidated (such as by an OST
852 * failure), and if the import(MGC) tried all of its connection
853 * list (Bug 13464), the request must fail with -ESHUTDOWN.
854 * This indicates the requests should be discarded; an -EIO
855 * may result in a resend of the request. */
856 if (!imp->imp_deactive)
857 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
858 *status = -ESHUTDOWN; /* bz 12940 */
859 } else if (req->rq_import_generation != imp->imp_generation) {
860 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
862 } else if (req->rq_send_state != imp->imp_state) {
863 /* invalidate in progress - any requests should be drop */
864 if (atomic_read(&imp->imp_inval_count) != 0) {
865 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
867 } else if (imp->imp_dlm_fake || req->rq_no_delay) {
868 *status = -EWOULDBLOCK;
877 static int ptlrpc_check_reply(struct ptlrpc_request *req)
882 /* serialise with network callback */
883 spin_lock(&req->rq_lock);
885 if (ptlrpc_client_replied(req))
888 if (req->rq_net_err && !req->rq_timedout) {
889 spin_unlock(&req->rq_lock);
890 rc = ptlrpc_expire_one_request(req, 0);
891 spin_lock(&req->rq_lock);
904 if (ptlrpc_client_early(req)) {
905 ptlrpc_at_recv_early_reply(req);
906 GOTO(out, rc = 0); /* keep waiting */
911 spin_unlock(&req->rq_lock);
912 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
916 static int ptlrpc_check_status(struct ptlrpc_request *req)
921 err = lustre_msg_get_status(req->rq_repmsg);
922 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
923 struct obd_import *imp = req->rq_import;
924 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
925 LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
926 " with %s. The %s operation failed with %d\n",
927 libcfs_nid2str(imp->imp_connection->c_peer.nid),
928 ll_opcode2str(opc), err);
929 RETURN(err < 0 ? err : -EINVAL);
933 DEBUG_REQ(D_INFO, req, "status is %d", err);
934 } else if (err > 0) {
935 /* XXX: translate this error from net to host */
936 DEBUG_REQ(D_INFO, req, "status is %d", err);
943 * Callback function called when client receives RPC reply for \a req.
945 static int after_reply(struct ptlrpc_request *req)
947 struct obd_import *imp = req->rq_import;
948 struct obd_device *obd = req->rq_import->imp_obd;
950 struct timeval work_start;
954 LASSERT(!req->rq_receiving_reply);
956 LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
959 * NB Until this point, the whole of the incoming message,
960 * including buflens, status etc is in the sender's byte order.
963 rc = sptlrpc_cli_unwrap_reply(req);
965 DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
970 * Security layer unwrap might ask resend this request.
975 rc = unpack_reply(req);
979 do_gettimeofday(&work_start);
980 timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
981 if (obd->obd_svc_stats != NULL)
982 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
985 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
986 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
987 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
988 lustre_msg_get_type(req->rq_repmsg));
992 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_PAUSE_REP, obd_fail_val);
993 ptlrpc_at_adj_service(req, lustre_msg_get_timeout(req->rq_repmsg));
994 ptlrpc_at_adj_net_latency(req,
995 lustre_msg_get_service_time(req->rq_repmsg));
997 rc = ptlrpc_check_status(req);
998 imp->imp_connect_error = rc;
1002 * Either we've been evicted, or the server has failed for
1003 * some reason. Try to reconnect, and if that fails, punt to
1006 if (ll_rpc_recoverable_error(rc)) {
1007 if (req->rq_send_state != LUSTRE_IMP_FULL ||
1008 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
1011 ptlrpc_request_handle_notconn(req);
1016 * Let's look if server sent slv. Do it only for RPC with
1019 ldlm_cli_update_pool(req);
1023 * Store transno in reqmsg for replay.
1025 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
1026 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
1028 if (req->rq_import->imp_replayable) {
1029 spin_lock(&imp->imp_lock);
1031 * No point in adding already-committed requests to the replay
1032 * list, we will just remove them immediately. b=9829
1034 if (req->rq_transno != 0 &&
1036 lustre_msg_get_last_committed(req->rq_repmsg) ||
1038 ptlrpc_retain_replayable_request(req, imp);
1039 else if (req->rq_commit_cb != NULL) {
1040 spin_unlock(&imp->imp_lock);
1041 req->rq_commit_cb(req);
1042 spin_lock(&imp->imp_lock);
1046 * Replay-enabled imports return commit-status information.
1048 if (lustre_msg_get_last_committed(req->rq_repmsg)) {
1049 imp->imp_peer_committed_transno =
1050 lustre_msg_get_last_committed(req->rq_repmsg);
1052 ptlrpc_free_committed(imp);
1053 spin_unlock(&imp->imp_lock);
1059 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
1061 struct obd_import *imp;
1065 LASSERT(req->rq_phase == RQ_PHASE_NEW);
1066 if (req->rq_sent && (req->rq_sent > cfs_time_current_sec()))
1069 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
1071 imp = req->rq_import;
1072 spin_lock(&imp->imp_lock);
1074 req->rq_import_generation = imp->imp_generation;
1076 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1077 spin_lock(&req->rq_lock);
1078 req->rq_waiting = 1;
1079 spin_unlock(&req->rq_lock);
1081 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
1082 "(%s != %s)", lustre_msg_get_status(req->rq_reqmsg),
1083 ptlrpc_import_state_name(req->rq_send_state),
1084 ptlrpc_import_state_name(imp->imp_state));
1085 LASSERT(list_empty(&req->rq_list));
1086 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1087 atomic_inc(&req->rq_import->imp_inflight);
1088 spin_unlock(&imp->imp_lock);
1093 spin_unlock(&imp->imp_lock);
1094 req->rq_status = rc;
1095 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1099 LASSERT(list_empty(&req->rq_list));
1100 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1101 atomic_inc(&req->rq_import->imp_inflight);
1102 spin_unlock(&imp->imp_lock);
1104 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1106 rc = sptlrpc_req_refresh_ctx(req, -1);
1109 req->rq_status = rc;
1112 req->rq_wait_ctx = 1;
1117 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
1118 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1119 imp->imp_obd->obd_uuid.uuid,
1120 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1121 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1122 lustre_msg_get_opc(req->rq_reqmsg));
1124 rc = ptl_send_rpc(req, 0);
1126 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
1127 req->rq_net_err = 1;
1133 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
1134 int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
1136 struct list_head *tmp;
1137 int force_timer_recalc = 0;
1140 if (set->set_remaining == 0)
1143 list_for_each(tmp, &set->set_requests) {
1144 struct ptlrpc_request *req =
1145 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1146 struct obd_import *imp = req->rq_import;
1149 if (req->rq_phase == RQ_PHASE_NEW &&
1150 ptlrpc_send_new_req(req)) {
1151 force_timer_recalc = 1;
1154 /* delayed send - skip */
1155 if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
1158 if (!(req->rq_phase == RQ_PHASE_RPC ||
1159 req->rq_phase == RQ_PHASE_BULK ||
1160 req->rq_phase == RQ_PHASE_INTERPRET ||
1161 req->rq_phase == RQ_PHASE_UNREGISTERING ||
1162 req->rq_phase == RQ_PHASE_COMPLETE)) {
1163 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
1167 if (req->rq_phase == RQ_PHASE_UNREGISTERING) {
1168 LASSERT(req->rq_next_phase != req->rq_phase);
1169 LASSERT(req->rq_next_phase != RQ_PHASE_UNDEFINED);
1172 * Skip processing until reply is unlinked. We
1173 * can't return to pool before that and we can't
1174 * call interpret before that. We need to make
1175 * sure that all rdma transfers finished and will
1176 * not corrupt any data.
1178 if (ptlrpc_client_recv_or_unlink(req))
1182 * Turn fail_loc off to prevent it from looping
1185 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_LONG_UNLINK,
1189 * Move to next phase if reply was successfully
1192 ptlrpc_rqphase_move(req, req->rq_next_phase);
1195 if (req->rq_phase == RQ_PHASE_COMPLETE)
1198 if (req->rq_phase == RQ_PHASE_INTERPRET)
1199 GOTO(interpret, req->rq_status);
1202 * Note that this also will start async reply unlink.
1204 if (req->rq_net_err && !req->rq_timedout) {
1205 ptlrpc_expire_one_request(req, 1);
1208 * Check if we still need to wait for unlink.
1210 if (ptlrpc_client_recv_or_unlink(req))
1215 req->rq_replied = 0;
1216 if (req->rq_status == 0)
1217 req->rq_status = -EIO;
1218 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1219 GOTO(interpret, req->rq_status);
1222 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
1223 * will only be set after rq_timedout, but the synchronous IO
1224 * waiting path sets rq_intr irrespective of whether ptlrpcd
1225 * has seen a timeout. our policy is to only interpret
1226 * interrupted rpcs after they have timed out */
1227 if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
1228 req->rq_wait_ctx)) {
1229 req->rq_status = -EINTR;
1230 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1231 GOTO(interpret, req->rq_status);
1234 if (req->rq_phase == RQ_PHASE_RPC) {
1235 if (req->rq_timedout || req->rq_resend ||
1236 req->rq_waiting || req->rq_wait_ctx) {
1239 if (!ptlrpc_unregister_reply(req, 1))
1242 spin_lock(&imp->imp_lock);
1244 if (ptlrpc_import_delay_req(imp, req, &status)){
1245 spin_unlock(&imp->imp_lock);
1250 req->rq_status = status;
1251 ptlrpc_rqphase_move(req,
1252 RQ_PHASE_INTERPRET);
1253 spin_unlock(&imp->imp_lock);
1254 GOTO(interpret, req->rq_status);
1256 if (req->rq_no_resend && !req->rq_wait_ctx) {
1257 req->rq_status = -ENOTCONN;
1258 ptlrpc_rqphase_move(req,
1259 RQ_PHASE_INTERPRET);
1260 spin_unlock(&imp->imp_lock);
1261 GOTO(interpret, req->rq_status);
1264 list_del_init(&req->rq_list);
1265 list_add_tail(&req->rq_list,
1266 &imp->imp_sending_list);
1268 spin_unlock(&imp->imp_lock);
1270 req->rq_waiting = 0;
1272 if (req->rq_timedout||req->rq_resend) {
1273 /* This is re-sending anyways,
1274 * let's mark req as resend. */
1276 lustre_msg_add_flags(req->rq_reqmsg,
1279 __u64 old_xid = req->rq_xid;
1281 ptlrpc_unregister_bulk(req);
1283 /* ensure previous bulk fails */
1284 req->rq_xid = ptlrpc_next_xid();
1285 CDEBUG(D_HA, "resend bulk "
1288 old_xid, req->rq_xid);
1292 * rq_wait_ctx is only touched by ptlrpcd,
1293 * so no lock is needed here.
1295 status = sptlrpc_req_refresh_ctx(req, -1);
1298 req->rq_status = status;
1299 force_timer_recalc = 1;
1301 req->rq_wait_ctx = 1;
1306 req->rq_wait_ctx = 0;
1309 rc = ptl_send_rpc(req, 0);
1311 DEBUG_REQ(D_HA, req, "send failed (%d)",
1313 force_timer_recalc = 1;
1314 req->rq_net_err = 1;
1316 /* need to reset the timeout */
1317 force_timer_recalc = 1;
1320 spin_lock(&req->rq_lock);
1322 if (ptlrpc_client_early(req)) {
1323 ptlrpc_at_recv_early_reply(req);
1324 spin_unlock(&req->rq_lock);
1328 /* Still waiting for a reply? */
1329 if (ptlrpc_client_recv(req)) {
1330 spin_unlock(&req->rq_lock);
1334 /* Did we actually receive a reply? */
1335 if (!ptlrpc_client_replied(req)) {
1336 spin_unlock(&req->rq_lock);
1340 spin_unlock(&req->rq_lock);
1342 req->rq_status = after_reply(req);
1343 if (req->rq_resend) {
1344 /* Add this req to the delayed list so
1345 it can be errored if the import is
1346 evicted after recovery. */
1347 spin_lock(&imp->imp_lock);
1348 list_del_init(&req->rq_list);
1349 list_add_tail(&req->rq_list,
1350 &imp->imp_delayed_list);
1351 spin_unlock(&imp->imp_lock);
1355 /* If there is no bulk associated with this request,
1356 * then we're done and should let the interpreter
1357 * process the reply. Similarly if the RPC returned
1358 * an error, and therefore the bulk will never arrive.
1360 if (req->rq_bulk == NULL || req->rq_status != 0) {
1361 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1362 GOTO(interpret, req->rq_status);
1365 ptlrpc_rqphase_move(req, RQ_PHASE_BULK);
1368 LASSERT(req->rq_phase == RQ_PHASE_BULK);
1369 if (ptlrpc_bulk_active(req->rq_bulk))
1372 if (!req->rq_bulk->bd_success) {
1373 /* The RPC reply arrived OK, but the bulk screwed
1374 * up! Dead wierd since the server told us the RPC
1375 * was good after getting the REPLY for her GET or
1376 * the ACK for her PUT. */
1377 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1381 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1384 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
1386 /* This moves to "unregistering" phase we need to wait for
1388 if (!ptlrpc_unregister_reply(req, 1))
1391 if (req->rq_bulk != NULL)
1392 ptlrpc_unregister_bulk(req);
1394 /* When calling interpret receiving already should be
1396 LASSERT(!req->rq_receiving_reply);
1398 if (req->rq_interpret_reply != NULL) {
1399 ptlrpc_interpterer_t interpreter =
1400 req->rq_interpret_reply;
1401 req->rq_status = interpreter(env, req,
1402 &req->rq_async_args,
1405 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
1407 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
1408 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1409 imp->imp_obd->obd_uuid.uuid,
1410 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1411 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1412 lustre_msg_get_opc(req->rq_reqmsg));
1414 spin_lock(&imp->imp_lock);
1415 /* Request already may be not on sending or delaying list. This
1416 * may happen in the case of marking it errorneous for the case
1417 * ptlrpc_import_delay_req(req, status) find it impossible to
1418 * allow sending this rpc and returns *status != 0. */
1419 if (!list_empty(&req->rq_list)) {
1420 list_del_init(&req->rq_list);
1421 atomic_dec(&imp->imp_inflight);
1423 spin_unlock(&imp->imp_lock);
1425 set->set_remaining--;
1426 cfs_waitq_signal(&imp->imp_recovery_waitq);
1429 /* If we hit an error, we want to recover promptly. */
1430 RETURN(set->set_remaining == 0 || force_timer_recalc);
1433 /* Return 1 if we should give up, else 0 */
1434 int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
1436 struct obd_import *imp = req->rq_import;
1440 DEBUG_REQ(D_ERROR|D_NETERROR, req,
1441 "%s (sent at "CFS_TIME_T", "CFS_DURATION_T"s ago)",
1442 req->rq_net_err ? "network error" : "timeout",
1443 req->rq_sent, cfs_time_sub(cfs_time_current_sec(),
1447 LCONSOLE_WARN("Request x"LPU64" sent from %s to NID %s "
1448 CFS_DURATION_T"s ago has timed out "
1449 "(limit "CFS_DURATION_T"s).\n", req->rq_xid,
1450 req->rq_import->imp_obd->obd_name,
1451 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1452 cfs_time_sub(cfs_time_current_sec(), req->rq_sent),
1453 cfs_time_sub(req->rq_deadline, req->rq_sent));
1456 if (imp != NULL && obd_debug_peer_on_timeout)
1457 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
1459 spin_lock(&req->rq_lock);
1460 req->rq_timedout = 1;
1461 spin_unlock(&req->rq_lock);
1463 ptlrpc_unregister_reply(req, async_unlink);
1465 if (obd_dump_on_timeout)
1466 libcfs_debug_dumplog();
1468 if (req->rq_bulk != NULL)
1469 ptlrpc_unregister_bulk (req);
1472 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
1476 /* The DLM server doesn't want recovery run on its imports. */
1477 if (imp->imp_dlm_fake)
1480 /* If this request is for recovery or other primordial tasks,
1481 * then error it out here. */
1482 if (req->rq_ctx_init || req->rq_ctx_fini ||
1483 req->rq_send_state != LUSTRE_IMP_FULL ||
1484 imp->imp_obd->obd_no_recov) {
1485 DEBUG_REQ(D_RPCTRACE, req, "err -110, sent_state=%s (now=%s)",
1486 ptlrpc_import_state_name(req->rq_send_state),
1487 ptlrpc_import_state_name(imp->imp_state));
1488 spin_lock(&req->rq_lock);
1489 req->rq_status = -ETIMEDOUT;
1491 spin_unlock(&req->rq_lock);
1495 /* if a request can't be resent we can't wait for an answer after
1497 if (req->rq_no_resend) {
1498 DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
1502 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
1507 int ptlrpc_expired_set(void *data)
1509 struct ptlrpc_request_set *set = data;
1510 struct list_head *tmp;
1511 time_t now = cfs_time_current_sec();
1514 LASSERT(set != NULL);
1517 * A timeout expired. See which reqs it applies to...
1519 list_for_each (tmp, &set->set_requests) {
1520 struct ptlrpc_request *req =
1521 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1523 /* Request in-flight? */
1524 if (!((req->rq_phase == RQ_PHASE_RPC &&
1525 !req->rq_waiting && !req->rq_resend) ||
1526 (req->rq_phase == RQ_PHASE_BULK)))
1529 if (req->rq_timedout || /* already dealt with */
1530 req->rq_deadline > now) /* not expired */
1533 /* Deal with this guy. Do it asynchronously to not block
1534 * ptlrpcd thread. */
1535 ptlrpc_expire_one_request(req, 1);
1539 * When waiting for a whole set, we always to break out of the
1540 * sleep so we can recalculate the timeout, or enable interrupts
1541 * if everyone's timed out.
1546 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1548 spin_lock(&req->rq_lock);
1550 spin_unlock(&req->rq_lock);
1553 void ptlrpc_interrupted_set(void *data)
1555 struct ptlrpc_request_set *set = data;
1556 struct list_head *tmp;
1558 LASSERT(set != NULL);
1559 CERROR("INTERRUPTED SET %p\n", set);
1561 list_for_each(tmp, &set->set_requests) {
1562 struct ptlrpc_request *req =
1563 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1565 if (req->rq_phase != RQ_PHASE_RPC &&
1566 req->rq_phase != RQ_PHASE_UNREGISTERING)
1569 ptlrpc_mark_interrupted(req);
1574 * Get the smallest timeout in the set; this does NOT set a timeout.
1576 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1578 struct list_head *tmp;
1579 time_t now = cfs_time_current_sec();
1581 struct ptlrpc_request *req;
1585 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1587 list_for_each(tmp, &set->set_requests) {
1588 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1591 * Request in-flight?
1593 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
1594 (req->rq_phase == RQ_PHASE_BULK) ||
1595 (req->rq_phase == RQ_PHASE_NEW)))
1599 * Already timed out.
1601 if (req->rq_timedout)
1607 if (req->rq_wait_ctx)
1610 if (req->rq_phase == RQ_PHASE_NEW)
1611 deadline = req->rq_sent;
1613 deadline = req->rq_sent + req->rq_timeout;
1615 if (deadline <= now) /* actually expired already */
1616 timeout = 1; /* ASAP */
1617 else if (timeout == 0 || timeout > deadline - now)
1618 timeout = deadline - now;
1623 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1625 struct list_head *tmp;
1626 struct ptlrpc_request *req;
1627 struct l_wait_info lwi;
1631 if (list_empty(&set->set_requests))
1634 list_for_each(tmp, &set->set_requests) {
1635 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1636 if (req->rq_phase == RQ_PHASE_NEW)
1637 (void)ptlrpc_send_new_req(req);
1641 timeout = ptlrpc_set_next_timeout(set);
1643 /* wait until all complete, interrupted, or an in-flight
1645 CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
1647 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
1649 ptlrpc_interrupted_set, set);
1650 rc = l_wait_event(set->set_waitq,
1651 ptlrpc_check_set(NULL, set), &lwi);
1653 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1655 /* -EINTR => all requests have been flagged rq_intr so next
1657 * -ETIMEOUTD => someone timed out. When all reqs have
1658 * timed out, signals are enabled allowing completion with
1660 * I don't really care if we go once more round the loop in
1661 * the error cases -eeb. */
1662 } while (rc != 0 || set->set_remaining != 0);
1664 LASSERT(set->set_remaining == 0);
1667 list_for_each(tmp, &set->set_requests) {
1668 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1670 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1671 if (req->rq_status != 0)
1672 rc = req->rq_status;
1675 if (set->set_interpret != NULL) {
1676 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1678 rc = interpreter (set, set->set_arg, rc);
1680 struct ptlrpc_set_cbdata *cbdata, *n;
1683 list_for_each_entry_safe(cbdata, n,
1684 &set->set_cblist, psc_item) {
1685 list_del_init(&cbdata->psc_item);
1686 err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
1689 OBD_FREE_PTR(cbdata);
1696 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1699 if (request == NULL) {
1704 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1705 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1706 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1707 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1708 LASSERTF(!request->rq_replay, "req %p\n", request);
1709 LASSERT(request->rq_cli_ctx);
1711 req_capsule_fini(&request->rq_pill);
1713 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1714 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1715 if (request->rq_import != NULL) {
1717 spin_lock(&request->rq_import->imp_lock);
1718 list_del_init(&request->rq_mod_list);
1719 list_del_init(&request->rq_replay_list);
1721 spin_unlock(&request->rq_import->imp_lock);
1723 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1725 if (atomic_read(&request->rq_refcount) != 0) {
1726 DEBUG_REQ(D_ERROR, request,
1727 "freeing request with nonzero refcount");
1731 if (request->rq_repbuf != NULL)
1732 sptlrpc_cli_free_repbuf(request);
1733 if (request->rq_export != NULL) {
1734 class_export_put(request->rq_export);
1735 request->rq_export = NULL;
1737 if (request->rq_import != NULL) {
1738 class_import_put(request->rq_import);
1739 request->rq_import = NULL;
1741 if (request->rq_bulk != NULL)
1742 ptlrpc_free_bulk(request->rq_bulk);
1744 if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
1745 sptlrpc_cli_free_reqbuf(request);
1747 sptlrpc_req_put_ctx(request, !locked);
1749 if (request->rq_pool)
1750 __ptlrpc_free_req_to_pool(request);
1752 OBD_FREE(request, sizeof(*request));
1756 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1757 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1759 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1760 (void)__ptlrpc_req_finished(request, 1);
1763 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1766 if (request == NULL)
1769 if (request == LP_POISON ||
1770 request->rq_reqmsg == LP_POISON) {
1771 CERROR("dereferencing freed request (bug 575)\n");
1776 DEBUG_REQ(D_INFO, request, "refcount now %u",
1777 atomic_read(&request->rq_refcount) - 1);
1779 if (atomic_dec_and_test(&request->rq_refcount)) {
1780 __ptlrpc_free_req(request, locked);
1787 void ptlrpc_req_finished(struct ptlrpc_request *request)
1789 __ptlrpc_req_finished(request, 0);
1792 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1794 return request->rq_xid;
1796 EXPORT_SYMBOL(ptlrpc_req_xid);
1798 /* Disengage the client's reply buffer from the network
1799 * NB does _NOT_ unregister any client-side bulk.
1800 * IDEMPOTENT, but _not_ safe against concurrent callers.
1801 * The request owner (i.e. the thread doing the I/O) must call...
1803 int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async)
1807 struct l_wait_info lwi;
1812 LASSERT(!in_interrupt());
1815 * Let's setup deadline for reply unlink.
1817 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_UNLINK) &&
1818 async && request->rq_reply_deadline == 0)
1819 request->rq_reply_deadline = cfs_time_current_sec()+LONG_UNLINK;
1822 * Nothing left to do.
1824 if (!ptlrpc_client_recv_or_unlink(request))
1827 LNetMDUnlink(request->rq_reply_md_h);
1830 * Let's check it once again.
1832 if (!ptlrpc_client_recv_or_unlink(request))
1836 * Move to "Unregistering" phase as reply was not unlinked yet.
1838 ptlrpc_rqphase_move(request, RQ_PHASE_UNREGISTERING);
1841 * Do not wait for unlink to finish.
1847 * We have to l_wait_event() whatever the result, to give liblustre
1848 * a chance to run reply_in_callback(), and to make sure we've
1849 * unlinked before returning a req to the pool.
1851 if (request->rq_set != NULL)
1852 wq = &request->rq_set->set_waitq;
1854 wq = &request->rq_reply_waitq;
1857 /* Network access will complete in finite time but the HUGE
1858 * timeout lets us CWARN for visibility of sluggish NALs */
1859 lwi = LWI_TIMEOUT(cfs_time_seconds(LONG_UNLINK), NULL, NULL);
1860 rc = l_wait_event(*wq, !ptlrpc_client_recv_or_unlink(request),
1863 ptlrpc_rqphase_move(request, request->rq_next_phase);
1867 LASSERT(rc == -ETIMEDOUT);
1868 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout "
1869 "rvcng=%d unlnk=%d", request->rq_receiving_reply,
1870 request->rq_must_unlink);
1875 /* caller must hold imp->imp_lock */
1876 void ptlrpc_free_committed(struct obd_import *imp)
1878 struct list_head *tmp, *saved;
1879 struct ptlrpc_request *req;
1880 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1883 LASSERT(imp != NULL);
1885 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1888 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1889 imp->imp_generation == imp->imp_last_generation_checked) {
1890 CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
1891 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1895 CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
1896 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1897 imp->imp_generation);
1898 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1899 imp->imp_last_generation_checked = imp->imp_generation;
1901 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1902 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1904 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1905 LASSERT(req != last_req);
1908 if (req->rq_import_generation < imp->imp_generation) {
1909 DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
1913 if (req->rq_replay) {
1914 DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
1918 /* not yet committed */
1919 if (req->rq_transno > imp->imp_peer_committed_transno) {
1920 DEBUG_REQ(D_RPCTRACE, req, "stopping search");
1924 DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
1925 imp->imp_peer_committed_transno);
1927 spin_lock(&req->rq_lock);
1929 spin_unlock(&req->rq_lock);
1930 if (req->rq_commit_cb != NULL)
1931 req->rq_commit_cb(req);
1932 list_del_init(&req->rq_replay_list);
1933 __ptlrpc_req_finished(req, 1);
1940 void ptlrpc_cleanup_client(struct obd_import *imp)
1947 void ptlrpc_resend_req(struct ptlrpc_request *req)
1949 DEBUG_REQ(D_HA, req, "going to resend");
1950 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
1951 req->rq_status = -EAGAIN;
1953 spin_lock(&req->rq_lock);
1955 req->rq_net_err = 0;
1956 req->rq_timedout = 0;
1958 __u64 old_xid = req->rq_xid;
1960 /* ensure previous bulk fails */
1961 req->rq_xid = ptlrpc_next_xid();
1962 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1963 old_xid, req->rq_xid);
1965 ptlrpc_client_wake_req(req);
1966 spin_unlock(&req->rq_lock);
1969 /* XXX: this function and rq_status are currently unused */
1970 void ptlrpc_restart_req(struct ptlrpc_request *req)
1972 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1973 req->rq_status = -ERESTARTSYS;
1975 spin_lock(&req->rq_lock);
1976 req->rq_restart = 1;
1977 req->rq_timedout = 0;
1978 ptlrpc_client_wake_req(req);
1979 spin_unlock(&req->rq_lock);
1982 static int expired_request(void *data)
1984 struct ptlrpc_request *req = data;
1988 * Some failure can suspend regular timeouts.
1990 if (ptlrpc_check_suspend())
1994 * Deadline may have changed with an early reply.
1996 if (req->rq_deadline > cfs_time_current_sec())
1999 RETURN(ptlrpc_expire_one_request(req, 0));
2002 static void interrupted_request(void *data)
2004 struct ptlrpc_request *req = data;
2005 DEBUG_REQ(D_HA, req, "request interrupted");
2006 spin_lock(&req->rq_lock);
2008 spin_unlock(&req->rq_lock);
2011 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
2014 atomic_inc(&req->rq_refcount);
2018 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
2019 struct obd_import *imp)
2021 struct list_head *tmp;
2023 LASSERT_SPIN_LOCKED(&imp->imp_lock);
2025 /* clear this for new requests that were resent as well
2026 as resent replayed requests. */
2027 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2029 /* don't re-add requests that have been replayed */
2030 if (!list_empty(&req->rq_replay_list))
2033 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
2035 LASSERT(imp->imp_replayable);
2036 /* Balanced in ptlrpc_free_committed, usually. */
2037 ptlrpc_request_addref(req);
2038 list_for_each_prev(tmp, &imp->imp_replay_list) {
2039 struct ptlrpc_request *iter =
2040 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
2042 /* We may have duplicate transnos if we create and then
2043 * open a file, or for closes retained if to match creating
2044 * opens, so use req->rq_xid as a secondary key.
2045 * (See bugs 684, 685, and 428.)
2046 * XXX no longer needed, but all opens need transnos!
2048 if (iter->rq_transno > req->rq_transno)
2051 if (iter->rq_transno == req->rq_transno) {
2052 LASSERT(iter->rq_xid != req->rq_xid);
2053 if (iter->rq_xid > req->rq_xid)
2057 list_add(&req->rq_replay_list, &iter->rq_replay_list);
2061 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
2064 int ptlrpc_queue_wait(struct ptlrpc_request *req)
2068 struct l_wait_info lwi;
2069 struct obd_import *imp = req->rq_import;
2070 cfs_duration_t timeout = CFS_TICK;
2074 LASSERT(req->rq_set == NULL);
2075 LASSERT(!req->rq_receiving_reply);
2077 /* for distributed debugging */
2078 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
2079 LASSERT(imp->imp_obd != NULL);
2080 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
2081 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
2082 imp->imp_obd->obd_uuid.uuid,
2083 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
2084 libcfs_nid2str(imp->imp_connection->c_peer.nid),
2085 lustre_msg_get_opc(req->rq_reqmsg));
2087 /* Mark phase here for a little debug help */
2088 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
2090 spin_lock(&imp->imp_lock);
2091 req->rq_import_generation = imp->imp_generation;
2093 if (ptlrpc_import_delay_req(imp, req, &rc)) {
2094 list_del_init(&req->rq_list);
2095 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
2096 atomic_inc(&imp->imp_inflight);
2097 spin_unlock(&imp->imp_lock);
2099 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
2101 ptlrpc_import_state_name(req->rq_send_state),
2102 ptlrpc_import_state_name(imp->imp_state));
2103 lwi = LWI_INTR(interrupted_request, req);
2104 rc = l_wait_event(req->rq_reply_waitq,
2105 (req->rq_send_state == imp->imp_state ||
2106 req->rq_err || req->rq_intr),
2108 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
2110 ptlrpc_import_state_name(imp->imp_state),
2111 ptlrpc_import_state_name(req->rq_send_state),
2112 req->rq_err, req->rq_intr);
2114 spin_lock(&imp->imp_lock);
2115 list_del_init(&req->rq_list);
2116 atomic_dec(&imp->imp_inflight);
2119 /* rq_status was set locally */
2122 else if (req->rq_intr) {
2125 else if (req->rq_no_resend) {
2126 spin_unlock(&imp->imp_lock);
2127 GOTO(out, rc = -ETIMEDOUT);
2135 spin_unlock(&imp->imp_lock);
2136 req->rq_status = rc; // XXX this ok?
2140 if (req->rq_resend) {
2141 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
2143 if (req->rq_bulk != NULL) {
2144 ptlrpc_unregister_bulk (req);
2146 /* bulk requests are supposed to be
2147 * idempotent, so we are free to bump the xid
2148 * here, which we need to do before
2149 * registering the bulk again (bug 6371).
2150 * print the old xid first for sanity.
2152 DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
2153 req->rq_xid = ptlrpc_next_xid();
2156 DEBUG_REQ(D_HA, req, "resending: ");
2159 /* XXX this is the same as ptlrpc_set_wait */
2160 LASSERT(list_empty(&req->rq_list));
2161 list_add_tail(&req->rq_list, &imp->imp_sending_list);
2162 atomic_inc(&imp->imp_inflight);
2163 spin_unlock(&imp->imp_lock);
2165 rc = sptlrpc_req_refresh_ctx(req, 0);
2168 /* we got fatal ctx refresh error, directly jump out
2169 * thus we can pass back the actual error code.
2171 spin_lock(&imp->imp_lock);
2172 list_del_init(&req->rq_list);
2173 spin_unlock(&imp->imp_lock);
2175 CERROR("Failed to refresh ctx of req %p: %d\n", req, rc);
2178 /* simulating we got error during send rpc */
2182 rc = ptl_send_rpc(req, 0);
2184 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
2186 timeoutl = req->rq_deadline - cfs_time_current_sec();
2187 timeout = (timeoutl <= 0 || rc) ? CFS_TICK :
2188 cfs_time_seconds(timeoutl);
2189 DEBUG_REQ(D_NET, req,
2190 "-- sleeping for "CFS_DURATION_T" ticks", timeout);
2191 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
2193 brc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
2194 if (brc == -ETIMEDOUT && ((req->rq_deadline > cfs_time_current_sec()) ||
2195 ptlrpc_check_and_wait_suspend(req)))
2199 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
2200 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
2201 imp->imp_obd->obd_uuid.uuid,
2202 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
2203 libcfs_nid2str(imp->imp_connection->c_peer.nid),
2204 lustre_msg_get_opc(req->rq_reqmsg));
2206 /* If the reply was received normally, this just grabs the spinlock
2207 * (ensuring the reply callback has returned), sees that
2208 * req->rq_receiving_reply is clear and returns. */
2209 ptlrpc_unregister_reply(req, 0);
2211 spin_lock(&imp->imp_lock);
2212 list_del_init(&req->rq_list);
2213 atomic_dec(&imp->imp_inflight);
2214 spin_unlock(&imp->imp_lock);
2217 DEBUG_REQ(D_RPCTRACE, req, "err rc=%d status=%d",
2218 rc, req->rq_status);
2219 GOTO(out, rc = rc ? rc : -EIO);
2223 /* Should only be interrupted if we timed out. */
2224 if (!req->rq_timedout)
2225 DEBUG_REQ(D_ERROR, req,
2226 "rq_intr set but rq_timedout not");
2227 GOTO(out, rc = -EINTR);
2230 /* Resend if we need to */
2231 if (req->rq_resend) {
2232 /* ...unless we were specifically told otherwise. */
2233 if (req->rq_no_resend)
2234 GOTO(out, rc = -ETIMEDOUT);
2235 spin_lock(&imp->imp_lock);
2239 if (req->rq_timedout) { /* non-recoverable timeout */
2240 GOTO(out, rc = -ETIMEDOUT);
2243 if (!ptlrpc_client_replied(req)) {
2244 /* How can this be? -eeb */
2245 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
2247 GOTO(out, rc = req->rq_status);
2250 rc = after_reply(req);
2251 /* NB may return +ve success rc */
2252 if (req->rq_resend) {
2253 spin_lock(&imp->imp_lock);
2258 if (req->rq_bulk != NULL) {
2260 /* success so far. Note that anything going wrong
2261 * with bulk now, is EXTREMELY strange, since the
2262 * server must have believed that the bulk
2263 * tranferred OK before she replied with success to
2265 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
2266 brc = l_wait_event(req->rq_reply_waitq,
2267 !ptlrpc_bulk_active(req->rq_bulk),
2269 LASSERT(brc == 0 || brc == -ETIMEDOUT);
2271 LASSERT(brc == -ETIMEDOUT);
2272 DEBUG_REQ(D_ERROR, req, "bulk timed out");
2274 } else if (!req->rq_bulk->bd_success) {
2275 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
2280 ptlrpc_unregister_bulk (req);
2283 LASSERT(!req->rq_receiving_reply);
2284 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
2285 cfs_waitq_signal(&imp->imp_recovery_waitq);
2289 struct ptlrpc_replay_async_args {
2291 int praa_old_status;
2294 static int ptlrpc_replay_interpret(const struct lu_env *env,
2295 struct ptlrpc_request *req,
2296 void * data, int rc)
2298 struct ptlrpc_replay_async_args *aa = data;
2299 struct obd_import *imp = req->rq_import;
2302 atomic_dec(&imp->imp_replay_inflight);
2304 if (!ptlrpc_client_replied(req)) {
2305 CERROR("request replay timed out, restarting recovery\n");
2306 GOTO(out, rc = -ETIMEDOUT);
2309 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
2310 (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
2311 lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
2312 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
2314 /* The transno had better not change over replay. */
2315 LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
2316 lustre_msg_get_transno(req->rq_repmsg));
2318 DEBUG_REQ(D_HA, req, "got rep");
2320 /* let the callback do fixups, possibly including in the request */
2321 if (req->rq_replay_cb)
2322 req->rq_replay_cb(req);
2324 if (ptlrpc_client_replied(req) &&
2325 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
2326 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
2327 lustre_msg_get_status(req->rq_repmsg),
2328 aa->praa_old_status);
2330 /* Put it back for re-replay. */
2331 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
2335 * Errors while replay can set transno to 0, but
2336 * imp_last_replay_transno shouldn't be set to 0 anyway
2338 if (req->rq_transno > 0) {
2339 spin_lock(&imp->imp_lock);
2340 LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
2341 imp->imp_last_replay_transno = req->rq_transno;
2342 spin_unlock(&imp->imp_lock);
2344 CERROR("Transno is 0 during replay!\n");
2345 /* continue with recovery */
2346 rc = ptlrpc_import_recovery_state_machine(imp);
2348 req->rq_send_state = aa->praa_old_state;
2351 /* this replay failed, so restart recovery */
2352 ptlrpc_connect_import(imp, NULL);
2357 int ptlrpc_replay_req(struct ptlrpc_request *req)
2359 struct ptlrpc_replay_async_args *aa;
2362 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
2363 /* Not handling automatic bulk replay yet (or ever?) */
2364 LASSERT(req->rq_bulk == NULL);
2366 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
2367 aa = ptlrpc_req_async_args(req);
2368 memset(aa, 0, sizeof *aa);
2370 /* Prepare request to be resent with ptlrpcd */
2371 aa->praa_old_state = req->rq_send_state;
2372 req->rq_send_state = LUSTRE_IMP_REPLAY;
2373 req->rq_phase = RQ_PHASE_NEW;
2374 req->rq_next_phase = RQ_PHASE_UNDEFINED;
2376 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
2378 req->rq_interpret_reply = ptlrpc_replay_interpret;
2379 /* Readjust the timeout for current conditions */
2380 ptlrpc_at_set_req_timeout(req);
2382 DEBUG_REQ(D_HA, req, "REPLAY");
2384 atomic_inc(&req->rq_import->imp_replay_inflight);
2385 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
2387 ptlrpcd_add_req(req, PSCOPE_OTHER);
2391 void ptlrpc_abort_inflight(struct obd_import *imp)
2393 struct list_head *tmp, *n;
2396 /* Make sure that no new requests get processed for this import.
2397 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
2398 * this flag and then putting requests on sending_list or delayed_list.
2400 spin_lock(&imp->imp_lock);
2402 /* XXX locking? Maybe we should remove each request with the list
2403 * locked? Also, how do we know if the requests on the list are
2404 * being freed at this time?
2406 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
2407 struct ptlrpc_request *req =
2408 list_entry(tmp, struct ptlrpc_request, rq_list);
2410 DEBUG_REQ(D_RPCTRACE, req, "inflight");
2412 spin_lock (&req->rq_lock);
2413 if (req->rq_import_generation < imp->imp_generation) {
2415 req->rq_status = -EINTR;
2416 ptlrpc_client_wake_req(req);
2418 spin_unlock (&req->rq_lock);
2421 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
2422 struct ptlrpc_request *req =
2423 list_entry(tmp, struct ptlrpc_request, rq_list);
2425 DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
2427 spin_lock (&req->rq_lock);
2428 if (req->rq_import_generation < imp->imp_generation) {
2430 req->rq_status = -EINTR;
2431 ptlrpc_client_wake_req(req);
2433 spin_unlock (&req->rq_lock);
2436 /* Last chance to free reqs left on the replay list, but we
2437 * will still leak reqs that haven't committed. */
2438 if (imp->imp_replayable)
2439 ptlrpc_free_committed(imp);
2441 spin_unlock(&imp->imp_lock);
2446 void ptlrpc_abort_set(struct ptlrpc_request_set *set)
2448 struct list_head *tmp, *pos;
2450 LASSERT(set != NULL);
2452 list_for_each_safe(pos, tmp, &set->set_requests) {
2453 struct ptlrpc_request *req =
2454 list_entry(pos, struct ptlrpc_request, rq_set_chain);
2456 spin_lock(&req->rq_lock);
2457 if (req->rq_phase != RQ_PHASE_RPC) {
2458 spin_unlock(&req->rq_lock);
2463 req->rq_status = -EINTR;
2464 ptlrpc_client_wake_req(req);
2465 spin_unlock(&req->rq_lock);
2469 static __u64 ptlrpc_last_xid;
2470 static spinlock_t ptlrpc_last_xid_lock;
2472 /* Initialize the XID for the node. This is common among all requests on
2473 * this node, and only requires the property that it is monotonically
2474 * increasing. It does not need to be sequential. Since this is also used
2475 * as the RDMA match bits, it is important that a single client NOT have
2476 * the same match bits for two different in-flight requests, hence we do
2477 * NOT want to have an XID per target or similar.
2479 * To avoid an unlikely collision between match bits after a client reboot
2480 * (which would cause old to be delivered into the wrong buffer) we initialize
2481 * the XID based on the current time, assuming a maximum RPC rate of 1M RPC/s.
2482 * If the time is clearly incorrect, we instead use a 62-bit random number.
2483 * In the worst case the random number will overflow 1M RPCs per second in
2484 * 9133 years, or permutations thereof.
2486 #define YEAR_2004 (1ULL << 30)
2487 void ptlrpc_init_xid(void)
2489 time_t now = cfs_time_current_sec();
2491 spin_lock_init(&ptlrpc_last_xid_lock);
2492 if (now < YEAR_2004) {
2493 ll_get_random_bytes(&ptlrpc_last_xid, sizeof(ptlrpc_last_xid));
2494 ptlrpc_last_xid >>= 2;
2495 ptlrpc_last_xid |= (1ULL << 61);
2497 ptlrpc_last_xid = (now << 20);
2501 __u64 ptlrpc_next_xid(void)
2504 spin_lock(&ptlrpc_last_xid_lock);
2505 tmp = ++ptlrpc_last_xid;
2506 spin_unlock(&ptlrpc_last_xid_lock);
2510 __u64 ptlrpc_sample_next_xid(void)
2512 #if BITS_PER_LONG == 32
2513 /* need to avoid possible word tearing on 32-bit systems */
2515 spin_lock(&ptlrpc_last_xid_lock);
2516 tmp = ptlrpc_last_xid + 1;
2517 spin_unlock(&ptlrpc_last_xid_lock);
2520 /* No need to lock, since returned value is racy anyways */
2521 return ptlrpc_last_xid + 1;
2524 EXPORT_SYMBOL(ptlrpc_sample_next_xid);