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;
203 at = &req->rq_import->imp_at;
204 idx = import_at_get_index(req->rq_import,
205 req->rq_request_portal);
206 serv_est = at_get(&at->iat_service_estimate[idx]);
207 req->rq_timeout = at_est2timeout(serv_est);
209 /* We could get even fancier here, using history to predict increased
212 /* Let the server know what this RPC timeout is by putting it in the
214 lustre_msg_set_timeout(req->rq_reqmsg, req->rq_timeout);
217 /* Adjust max service estimate based on server value */
218 static void ptlrpc_at_adj_service(struct ptlrpc_request *req,
219 unsigned int serv_est)
225 LASSERT(req->rq_import);
226 at = &req->rq_import->imp_at;
228 idx = import_at_get_index(req->rq_import, req->rq_request_portal);
229 /* max service estimates are tracked on the server side,
230 so just keep minimal history here */
231 oldse = at_add(&at->iat_service_estimate[idx], serv_est);
233 CDEBUG(D_ADAPTTO, "The RPC service estimate for %s ptl %d "
234 "has changed from %d to %d\n",
235 req->rq_import->imp_obd->obd_name,req->rq_request_portal,
236 oldse, at_get(&at->iat_service_estimate[idx]));
239 /* Expected network latency per remote node (secs) */
240 int ptlrpc_at_get_net_latency(struct ptlrpc_request *req)
242 return AT_OFF ? 0 : at_get(&req->rq_import->imp_at.iat_net_latency);
245 /* Adjust expected network latency */
246 static void ptlrpc_at_adj_net_latency(struct ptlrpc_request *req,
247 unsigned int service_time)
249 unsigned int nl, oldnl;
251 time_t now = cfs_time_current_sec();
253 LASSERT(req->rq_import);
254 at = &req->rq_import->imp_at;
256 /* Network latency is total time less server processing time */
257 nl = max_t(int, now - req->rq_sent - service_time, 0) +1/*st rounding*/;
258 if (service_time > now - req->rq_sent + 3 /* bz16408 */)
259 CWARN("Reported service time %u > total measured time "
260 CFS_DURATION_T"\n", service_time,
261 cfs_time_sub(now, req->rq_sent));
263 oldnl = at_add(&at->iat_net_latency, nl);
265 CDEBUG(D_ADAPTTO, "The network latency for %s (nid %s) "
266 "has changed from %d to %d\n",
267 req->rq_import->imp_obd->obd_name,
269 &req->rq_import->imp_connection->c_remote_uuid),
270 oldnl, at_get(&at->iat_net_latency));
273 static int unpack_reply(struct ptlrpc_request *req)
277 if (SPTLRPC_FLVR_POLICY(req->rq_flvr.sf_rpc) != SPTLRPC_POLICY_NULL) {
278 rc = ptlrpc_unpack_rep_msg(req, req->rq_replen);
280 DEBUG_REQ(D_ERROR, req, "unpack_rep failed: %d", rc);
285 rc = lustre_unpack_rep_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
287 DEBUG_REQ(D_ERROR, req, "unpack ptlrpc body failed: %d", rc);
294 * Handle an early reply message, called with the rq_lock held.
295 * If anything goes wrong just ignore it - same as if it never happened
297 static int ptlrpc_at_recv_early_reply(struct ptlrpc_request *req)
299 struct ptlrpc_request *early_req;
305 spin_unlock(&req->rq_lock);
307 rc = sptlrpc_cli_unwrap_early_reply(req, &early_req);
309 spin_lock(&req->rq_lock);
313 rc = unpack_reply(early_req);
315 /* Expecting to increase the service time estimate here */
316 ptlrpc_at_adj_service(req,
317 lustre_msg_get_timeout(early_req->rq_repmsg));
318 ptlrpc_at_adj_net_latency(req,
319 lustre_msg_get_service_time(early_req->rq_repmsg));
322 sptlrpc_cli_finish_early_reply(early_req);
324 spin_lock(&req->rq_lock);
327 /* Adjust the local timeout for this req */
328 ptlrpc_at_set_req_timeout(req);
330 olddl = req->rq_deadline;
331 /* server assumes it now has rq_timeout from when it sent the
332 early reply, so client should give it at least that long. */
333 req->rq_deadline = cfs_time_current_sec() + req->rq_timeout +
334 ptlrpc_at_get_net_latency(req);
336 DEBUG_REQ(D_ADAPTTO, req,
337 "Early reply #%d, new deadline in "CFS_DURATION_T"s "
338 "("CFS_DURATION_T"s)", req->rq_early_count,
339 cfs_time_sub(req->rq_deadline,
340 cfs_time_current_sec()),
341 cfs_time_sub(req->rq_deadline, olddl));
347 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
349 struct list_head *l, *tmp;
350 struct ptlrpc_request *req;
352 LASSERT(pool != NULL);
354 spin_lock(&pool->prp_lock);
355 list_for_each_safe(l, tmp, &pool->prp_req_list) {
356 req = list_entry(l, struct ptlrpc_request, rq_list);
357 list_del(&req->rq_list);
358 LASSERT(req->rq_reqbuf);
359 LASSERT(req->rq_reqbuf_len == pool->prp_rq_size);
360 OBD_FREE(req->rq_reqbuf, pool->prp_rq_size);
361 OBD_FREE(req, sizeof(*req));
363 spin_unlock(&pool->prp_lock);
364 OBD_FREE(pool, sizeof(*pool));
367 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
372 while (size < pool->prp_rq_size + SPTLRPC_MAX_PAYLOAD)
375 LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
376 "Trying to change pool size with nonempty pool "
377 "from %d to %d bytes\n", pool->prp_rq_size, size);
379 spin_lock(&pool->prp_lock);
380 pool->prp_rq_size = size;
381 for (i = 0; i < num_rq; i++) {
382 struct ptlrpc_request *req;
383 struct lustre_msg *msg;
385 spin_unlock(&pool->prp_lock);
386 OBD_ALLOC(req, sizeof(struct ptlrpc_request));
389 OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
391 OBD_FREE(req, sizeof(struct ptlrpc_request));
394 req->rq_reqbuf = msg;
395 req->rq_reqbuf_len = size;
397 spin_lock(&pool->prp_lock);
398 list_add_tail(&req->rq_list, &pool->prp_req_list);
400 spin_unlock(&pool->prp_lock);
404 struct ptlrpc_request_pool *
405 ptlrpc_init_rq_pool(int num_rq, int msgsize,
406 void (*populate_pool)(struct ptlrpc_request_pool *, int))
408 struct ptlrpc_request_pool *pool;
410 OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
414 /* Request next power of two for the allocation, because internally
415 kernel would do exactly this */
417 spin_lock_init(&pool->prp_lock);
418 CFS_INIT_LIST_HEAD(&pool->prp_req_list);
419 pool->prp_rq_size = msgsize;
420 pool->prp_populate = populate_pool;
422 populate_pool(pool, num_rq);
424 if (list_empty(&pool->prp_req_list)) {
425 /* have not allocated a single request for the pool */
426 OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
432 static struct ptlrpc_request *
433 ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
435 struct ptlrpc_request *request;
436 struct lustre_msg *reqbuf;
441 spin_lock(&pool->prp_lock);
443 /* See if we have anything in a pool, and bail out if nothing,
444 * in writeout path, where this matters, this is safe to do, because
445 * nothing is lost in this case, and when some in-flight requests
446 * complete, this code will be called again. */
447 if (unlikely(list_empty(&pool->prp_req_list))) {
448 spin_unlock(&pool->prp_lock);
452 request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
454 list_del_init(&request->rq_list);
455 spin_unlock(&pool->prp_lock);
457 LASSERT(request->rq_reqbuf);
458 LASSERT(request->rq_pool);
460 reqbuf = request->rq_reqbuf;
461 memset(request, 0, sizeof(*request));
462 request->rq_reqbuf = reqbuf;
463 request->rq_reqbuf_len = pool->prp_rq_size;
464 request->rq_pool = pool;
469 static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
471 struct ptlrpc_request_pool *pool = request->rq_pool;
473 spin_lock(&pool->prp_lock);
474 LASSERT(list_empty(&request->rq_list));
475 LASSERT(!request->rq_receiving_reply);
476 list_add_tail(&request->rq_list, &pool->prp_req_list);
477 spin_unlock(&pool->prp_lock);
480 static int __ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
481 __u32 version, int opcode,
482 int count, __u32 *lengths, char **bufs,
483 struct ptlrpc_cli_ctx *ctx)
485 struct obd_import *imp = request->rq_import;
490 request->rq_cli_ctx = sptlrpc_cli_ctx_get(ctx);
492 rc = sptlrpc_req_get_ctx(request);
497 sptlrpc_req_set_flavor(request, opcode);
499 rc = lustre_pack_request(request, imp->imp_msg_magic, count,
502 LASSERT(!request->rq_pool);
506 lustre_msg_add_version(request->rq_reqmsg, version);
507 request->rq_send_state = LUSTRE_IMP_FULL;
508 request->rq_type = PTL_RPC_MSG_REQUEST;
509 request->rq_export = NULL;
511 request->rq_req_cbid.cbid_fn = request_out_callback;
512 request->rq_req_cbid.cbid_arg = request;
514 request->rq_reply_cbid.cbid_fn = reply_in_callback;
515 request->rq_reply_cbid.cbid_arg = request;
517 request->rq_reply_deadline = 0;
518 request->rq_phase = RQ_PHASE_NEW;
519 request->rq_next_phase = RQ_PHASE_UNDEFINED;
521 request->rq_request_portal = imp->imp_client->cli_request_portal;
522 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
524 ptlrpc_at_set_req_timeout(request);
526 spin_lock_init(&request->rq_lock);
527 CFS_INIT_LIST_HEAD(&request->rq_list);
528 CFS_INIT_LIST_HEAD(&request->rq_timed_list);
529 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
530 CFS_INIT_LIST_HEAD(&request->rq_ctx_chain);
531 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
532 CFS_INIT_LIST_HEAD(&request->rq_history_list);
533 CFS_INIT_LIST_HEAD(&request->rq_exp_list);
534 cfs_waitq_init(&request->rq_reply_waitq);
535 request->rq_xid = ptlrpc_next_xid();
536 atomic_set(&request->rq_refcount, 1);
538 lustre_msg_set_opc(request->rq_reqmsg, opcode);
542 sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
544 class_import_put(imp);
548 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
549 __u32 version, int opcode, char **bufs,
550 struct ptlrpc_cli_ctx *ctx)
554 count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
555 return __ptlrpc_request_bufs_pack(request, version, opcode, count,
556 request->rq_pill.rc_area[RCL_CLIENT],
559 EXPORT_SYMBOL(ptlrpc_request_bufs_pack);
561 int ptlrpc_request_pack(struct ptlrpc_request *request,
562 __u32 version, int opcode)
564 return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
568 struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
569 struct ptlrpc_request_pool *pool)
571 struct ptlrpc_request *request = NULL;
574 request = ptlrpc_prep_req_from_pool(pool);
577 OBD_ALLOC_PTR(request);
580 LASSERTF((unsigned long)imp > 0x1000, "%p", imp);
581 LASSERT(imp != LP_POISON);
582 LASSERTF((unsigned long)imp->imp_client > 0x1000, "%p",
584 LASSERT(imp->imp_client != LP_POISON);
586 request->rq_import = class_import_get(imp);
588 CERROR("request allocation out of memory\n");
594 static struct ptlrpc_request *
595 ptlrpc_request_alloc_internal(struct obd_import *imp,
596 struct ptlrpc_request_pool * pool,
597 const struct req_format *format)
599 struct ptlrpc_request *request;
601 request = __ptlrpc_request_alloc(imp, pool);
605 req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
606 req_capsule_set(&request->rq_pill, format);
610 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
611 const struct req_format *format)
613 return ptlrpc_request_alloc_internal(imp, NULL, format);
616 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
617 struct ptlrpc_request_pool * pool,
618 const struct req_format *format)
620 return ptlrpc_request_alloc_internal(imp, pool, format);
623 void ptlrpc_request_free(struct ptlrpc_request *request)
625 if (request->rq_pool)
626 __ptlrpc_free_req_to_pool(request);
628 OBD_FREE_PTR(request);
631 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
632 const struct req_format *format,
633 __u32 version, int opcode)
635 struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
639 rc = ptlrpc_request_pack(req, version, opcode);
641 ptlrpc_request_free(req);
648 struct ptlrpc_request *
649 ptlrpc_prep_req_pool(struct obd_import *imp,
650 __u32 version, int opcode,
651 int count, __u32 *lengths, char **bufs,
652 struct ptlrpc_request_pool *pool)
654 struct ptlrpc_request *request;
657 request = __ptlrpc_request_alloc(imp, pool);
661 rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
662 lengths, bufs, NULL);
664 ptlrpc_request_free(request);
670 struct ptlrpc_request *
671 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
672 __u32 *lengths, char **bufs)
674 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
678 struct ptlrpc_request *ptlrpc_prep_fakereq(struct obd_import *imp,
679 unsigned int timeout,
680 ptlrpc_interpterer_t interpreter)
682 struct ptlrpc_request *request = NULL;
685 OBD_ALLOC(request, sizeof(*request));
687 CERROR("request allocation out of memory\n");
691 request->rq_send_state = LUSTRE_IMP_FULL;
692 request->rq_type = PTL_RPC_MSG_REQUEST;
693 request->rq_import = class_import_get(imp);
694 request->rq_export = NULL;
695 request->rq_import_generation = imp->imp_generation;
697 request->rq_timeout = timeout;
698 request->rq_sent = cfs_time_current_sec();
699 request->rq_deadline = request->rq_sent + timeout;
700 request->rq_reply_deadline = request->rq_deadline;
701 request->rq_interpret_reply = interpreter;
702 request->rq_phase = RQ_PHASE_RPC;
703 request->rq_next_phase = RQ_PHASE_INTERPRET;
704 /* don't want reply */
705 request->rq_receiving_reply = 0;
706 request->rq_must_unlink = 0;
707 request->rq_no_delay = request->rq_no_resend = 1;
708 request->rq_fake = 1;
710 spin_lock_init(&request->rq_lock);
711 CFS_INIT_LIST_HEAD(&request->rq_list);
712 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
713 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
714 CFS_INIT_LIST_HEAD(&request->rq_history_list);
715 CFS_INIT_LIST_HEAD(&request->rq_exp_list);
716 cfs_waitq_init(&request->rq_reply_waitq);
718 request->rq_xid = ptlrpc_next_xid();
719 atomic_set(&request->rq_refcount, 1);
724 void ptlrpc_fakereq_finished(struct ptlrpc_request *req)
726 /* if we kill request before timeout - need adjust counter */
727 if (req->rq_phase == RQ_PHASE_RPC) {
728 struct ptlrpc_request_set *set = req->rq_set;
731 set->set_remaining --;
734 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
735 list_del_init(&req->rq_list);
739 struct ptlrpc_request_set *ptlrpc_prep_set(void)
741 struct ptlrpc_request_set *set;
744 OBD_ALLOC(set, sizeof *set);
747 CFS_INIT_LIST_HEAD(&set->set_requests);
748 cfs_waitq_init(&set->set_waitq);
749 set->set_remaining = 0;
750 spin_lock_init(&set->set_new_req_lock);
751 CFS_INIT_LIST_HEAD(&set->set_new_requests);
752 CFS_INIT_LIST_HEAD(&set->set_cblist);
757 /* Finish with this set; opposite of prep_set. */
758 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
760 struct list_head *tmp;
761 struct list_head *next;
766 /* Requests on the set should either all be completed, or all be new */
767 expected_phase = (set->set_remaining == 0) ?
768 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
769 list_for_each (tmp, &set->set_requests) {
770 struct ptlrpc_request *req =
771 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
773 LASSERT(req->rq_phase == expected_phase);
777 LASSERTF(set->set_remaining == 0 || set->set_remaining == n, "%d / %d\n",
778 set->set_remaining, n);
780 list_for_each_safe(tmp, next, &set->set_requests) {
781 struct ptlrpc_request *req =
782 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
783 list_del_init(&req->rq_set_chain);
785 LASSERT(req->rq_phase == expected_phase);
787 if (req->rq_phase == RQ_PHASE_NEW) {
788 ptlrpc_req_interpret(NULL, req, -EBADR);
789 set->set_remaining--;
793 ptlrpc_req_finished (req);
796 LASSERT(set->set_remaining == 0);
798 OBD_FREE(set, sizeof(*set));
802 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
803 set_interpreter_func fn, void *data)
805 struct ptlrpc_set_cbdata *cbdata;
807 OBD_ALLOC_PTR(cbdata);
811 cbdata->psc_interpret = fn;
812 cbdata->psc_data = data;
813 list_add_tail(&cbdata->psc_item, &set->set_cblist);
818 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
819 struct ptlrpc_request *req)
821 /* The set takes over the caller's request reference */
822 list_add_tail(&req->rq_set_chain, &set->set_requests);
824 set->set_remaining++;
828 * Lock so many callers can add things, the context that owns the set
829 * is supposed to notice these and move them into the set proper.
831 int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
832 struct ptlrpc_request *req)
834 struct ptlrpc_request_set *set = pc->pc_set;
837 * Let caller know that we stopped and will not handle this request.
838 * It needs to take care itself of request.
840 if (test_bit(LIOD_STOP, &pc->pc_flags))
843 spin_lock(&set->set_new_req_lock);
845 * The set takes over the caller's request reference.
847 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
849 spin_unlock(&set->set_new_req_lock);
851 cfs_waitq_signal(&set->set_waitq);
856 * Based on the current state of the import, determine if the request
857 * can be sent, is an error, or should be delayed.
859 * Returns true if this request should be delayed. If false, and
860 * *status is set, then the request can not be sent and *status is the
861 * error code. If false and status is 0, then request can be sent.
863 * The imp->imp_lock must be held.
865 static int ptlrpc_import_delay_req(struct obd_import *imp,
866 struct ptlrpc_request *req, int *status)
871 LASSERT (status != NULL);
874 if (req->rq_ctx_init || req->rq_ctx_fini) {
875 /* always allow ctx init/fini rpc go through */
876 } else if (imp->imp_state == LUSTRE_IMP_NEW) {
877 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
880 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
881 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
883 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
884 imp->imp_state == LUSTRE_IMP_CONNECTING) {
885 /* allow CONNECT even if import is invalid */ ;
886 if (atomic_read(&imp->imp_inval_count) != 0) {
887 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
890 } else if ((imp->imp_invalid && (!imp->imp_recon_bk)) ||
891 imp->imp_obd->obd_no_recov) {
892 /* If the import has been invalidated (such as by an OST
893 * failure), and if the import(MGC) tried all of its connection
894 * list (Bug 13464), the request must fail with -ESHUTDOWN.
895 * This indicates the requests should be discarded; an -EIO
896 * may result in a resend of the request. */
897 if (!imp->imp_deactive)
898 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
899 *status = -ESHUTDOWN; /* bz 12940 */
900 } else if (req->rq_import_generation != imp->imp_generation) {
901 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
903 } else if (req->rq_send_state != imp->imp_state) {
904 /* invalidate in progress - any requests should be drop */
905 if (atomic_read(&imp->imp_inval_count) != 0) {
906 DEBUG_REQ(D_ERROR, req, "invalidate in flight");
908 } else if (imp->imp_dlm_fake || req->rq_no_delay) {
909 *status = -EWOULDBLOCK;
919 /* Conditionally suppress specific console messages */
920 static int ptlrpc_console_allow(struct ptlrpc_request *req)
922 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
925 /* Suppress particular reconnect errors which are to be expected. No
926 * errors are suppressed for the initial connection on an import */
927 if ((lustre_handle_is_used(&req->rq_import->imp_remote_handle)) &&
928 (opc == OST_CONNECT || opc == MDS_CONNECT || opc == MGS_CONNECT)) {
930 /* Suppress timed out reconnect requests */
931 if (req->rq_timedout)
934 /* Suppress unavailable/again reconnect requests */
935 err = lustre_msg_get_status(req->rq_repmsg);
936 if (err == -ENODEV || err == -EAGAIN)
943 static int ptlrpc_check_status(struct ptlrpc_request *req)
948 err = lustre_msg_get_status(req->rq_repmsg);
949 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
950 struct obd_import *imp = req->rq_import;
951 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
952 LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
953 " with %s. The %s operation failed with %d\n",
954 libcfs_nid2str(imp->imp_connection->c_peer.nid),
955 ll_opcode2str(opc), err);
956 RETURN(err < 0 ? err : -EINVAL);
960 DEBUG_REQ(D_INFO, req, "status is %d", err);
961 } else if (err > 0) {
962 /* XXX: translate this error from net to host */
963 DEBUG_REQ(D_INFO, req, "status is %d", err);
966 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
967 struct obd_import *imp = req->rq_import;
968 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
970 if (ptlrpc_console_allow(req))
971 LCONSOLE_ERROR_MSG(0x011,"an error occurred while "
972 "communicating with %s. The %s "
973 "operation failed with %d\n",
975 imp->imp_connection->c_peer.nid),
976 ll_opcode2str(opc), err);
978 RETURN(err < 0 ? err : -EINVAL);
985 * save pre-versions for replay
987 static void ptlrpc_save_versions(struct ptlrpc_request *req)
989 struct lustre_msg *repmsg = req->rq_repmsg;
990 struct lustre_msg *reqmsg = req->rq_reqmsg;
991 __u64 *versions = lustre_msg_get_versions(repmsg);
994 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
998 lustre_msg_set_versions(reqmsg, versions);
999 CDEBUG(D_INFO, "Client save versions ["LPX64"/"LPX64"]\n",
1000 versions[0], versions[1]);
1006 * Callback function called when client receives RPC reply for \a req.
1008 static int after_reply(struct ptlrpc_request *req)
1010 struct obd_import *imp = req->rq_import;
1011 struct obd_device *obd = req->rq_import->imp_obd;
1013 struct timeval work_start;
1017 LASSERT(!req->rq_receiving_reply);
1019 LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
1021 if (req->rq_reply_truncate && !req->rq_no_resend) {
1023 sptlrpc_cli_free_repbuf(req);
1024 req->rq_replen = req->rq_nob_received;
1029 * NB Until this point, the whole of the incoming message,
1030 * including buflens, status etc is in the sender's byte order.
1033 rc = sptlrpc_cli_unwrap_reply(req);
1035 DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
1040 * Security layer unwrap might ask resend this request.
1045 rc = unpack_reply(req);
1049 do_gettimeofday(&work_start);
1050 timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
1051 if (obd->obd_svc_stats != NULL) {
1052 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
1054 ptlrpc_lprocfs_rpc_sent(req, timediff);
1057 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
1058 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
1059 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
1060 lustre_msg_get_type(req->rq_repmsg));
1064 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_PAUSE_REP, obd_fail_val);
1065 ptlrpc_at_adj_service(req, lustre_msg_get_timeout(req->rq_repmsg));
1066 ptlrpc_at_adj_net_latency(req,
1067 lustre_msg_get_service_time(req->rq_repmsg));
1069 rc = ptlrpc_check_status(req);
1070 imp->imp_connect_error = rc;
1074 * Either we've been evicted, or the server has failed for
1075 * some reason. Try to reconnect, and if that fails, punt to
1078 if (ll_rpc_recoverable_error(rc)) {
1079 if (req->rq_send_state != LUSTRE_IMP_FULL ||
1080 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
1083 ptlrpc_request_handle_notconn(req);
1088 * Let's look if server sent slv. Do it only for RPC with
1091 ldlm_cli_update_pool(req);
1095 * Store transno in reqmsg for replay.
1097 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) {
1098 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
1099 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
1102 if (imp->imp_replayable) {
1103 spin_lock(&imp->imp_lock);
1105 * No point in adding already-committed requests to the replay
1106 * list, we will just remove them immediately. b=9829
1108 if (req->rq_transno != 0 &&
1110 lustre_msg_get_last_committed(req->rq_repmsg) ||
1112 /** version recovery */
1113 ptlrpc_save_versions(req);
1114 ptlrpc_retain_replayable_request(req, imp);
1115 } else if (req->rq_commit_cb != NULL) {
1116 spin_unlock(&imp->imp_lock);
1117 req->rq_commit_cb(req);
1118 spin_lock(&imp->imp_lock);
1122 * Replay-enabled imports return commit-status information.
1124 if (lustre_msg_get_last_committed(req->rq_repmsg)) {
1125 imp->imp_peer_committed_transno =
1126 lustre_msg_get_last_committed(req->rq_repmsg);
1128 ptlrpc_free_committed(imp);
1129 spin_unlock(&imp->imp_lock);
1135 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
1137 struct obd_import *imp;
1141 LASSERT(req->rq_phase == RQ_PHASE_NEW);
1142 if (req->rq_sent && (req->rq_sent > cfs_time_current_sec()))
1145 ptlrpc_rqphase_move(req, RQ_PHASE_RPC);
1147 imp = req->rq_import;
1148 spin_lock(&imp->imp_lock);
1150 req->rq_import_generation = imp->imp_generation;
1152 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1153 spin_lock(&req->rq_lock);
1154 req->rq_waiting = 1;
1155 spin_unlock(&req->rq_lock);
1157 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
1158 "(%s != %s)", lustre_msg_get_status(req->rq_reqmsg),
1159 ptlrpc_import_state_name(req->rq_send_state),
1160 ptlrpc_import_state_name(imp->imp_state));
1161 LASSERT(list_empty(&req->rq_list));
1162 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1163 atomic_inc(&req->rq_import->imp_inflight);
1164 spin_unlock(&imp->imp_lock);
1169 spin_unlock(&imp->imp_lock);
1170 req->rq_status = rc;
1171 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1175 LASSERT(list_empty(&req->rq_list));
1176 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1177 atomic_inc(&req->rq_import->imp_inflight);
1178 spin_unlock(&imp->imp_lock);
1180 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1182 rc = sptlrpc_req_refresh_ctx(req, -1);
1185 req->rq_status = rc;
1188 req->rq_wait_ctx = 1;
1193 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
1194 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1195 imp->imp_obd->obd_uuid.uuid,
1196 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1197 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1198 lustre_msg_get_opc(req->rq_reqmsg));
1200 rc = ptl_send_rpc(req, 0);
1202 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
1203 req->rq_net_err = 1;
1209 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
1210 int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set)
1212 struct list_head *tmp;
1213 int force_timer_recalc = 0;
1216 if (set->set_remaining == 0)
1219 list_for_each(tmp, &set->set_requests) {
1220 struct ptlrpc_request *req =
1221 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1222 struct obd_import *imp = req->rq_import;
1225 if (req->rq_phase == RQ_PHASE_NEW &&
1226 ptlrpc_send_new_req(req)) {
1227 force_timer_recalc = 1;
1230 /* delayed send - skip */
1231 if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
1234 if (!(req->rq_phase == RQ_PHASE_RPC ||
1235 req->rq_phase == RQ_PHASE_BULK ||
1236 req->rq_phase == RQ_PHASE_INTERPRET ||
1237 req->rq_phase == RQ_PHASE_UNREGISTERING ||
1238 req->rq_phase == RQ_PHASE_COMPLETE)) {
1239 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
1243 if (req->rq_phase == RQ_PHASE_UNREGISTERING) {
1244 LASSERT(req->rq_next_phase != req->rq_phase);
1245 LASSERT(req->rq_next_phase != RQ_PHASE_UNDEFINED);
1248 * Skip processing until reply is unlinked. We
1249 * can't return to pool before that and we can't
1250 * call interpret before that. We need to make
1251 * sure that all rdma transfers finished and will
1252 * not corrupt any data.
1254 if (ptlrpc_client_recv_or_unlink(req) ||
1255 ptlrpc_client_bulk_active(req))
1259 * Turn fail_loc off to prevent it from looping
1262 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
1263 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK,
1266 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK)) {
1267 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK,
1272 * Move to next phase if reply was successfully
1275 ptlrpc_rqphase_move(req, req->rq_next_phase);
1278 if (req->rq_phase == RQ_PHASE_COMPLETE)
1281 if (req->rq_phase == RQ_PHASE_INTERPRET)
1282 GOTO(interpret, req->rq_status);
1285 * Note that this also will start async reply unlink.
1287 if (req->rq_net_err && !req->rq_timedout) {
1288 ptlrpc_expire_one_request(req, 1);
1291 * Check if we still need to wait for unlink.
1293 if (ptlrpc_client_recv_or_unlink(req) ||
1294 ptlrpc_client_bulk_active(req))
1299 req->rq_replied = 0;
1300 if (req->rq_status == 0)
1301 req->rq_status = -EIO;
1302 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1303 GOTO(interpret, req->rq_status);
1306 /* ptlrpc_set_wait->l_wait_event sets lwi_allow_intr
1307 * so it sets rq_intr regardless of individual rpc
1308 * timeouts. The synchronous IO waiting path sets
1309 * rq_intr irrespective of whether ptlrpcd
1310 * has seen a timeout. Our policy is to only interpret
1311 * interrupted rpcs after they have timed out, so we
1312 * need to enforce that here.
1315 if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
1316 req->rq_wait_ctx)) {
1317 req->rq_status = -EINTR;
1318 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1319 GOTO(interpret, req->rq_status);
1322 if (req->rq_phase == RQ_PHASE_RPC) {
1323 if (req->rq_timedout || req->rq_resend ||
1324 req->rq_waiting || req->rq_wait_ctx) {
1327 if (!ptlrpc_unregister_reply(req, 1))
1330 spin_lock(&imp->imp_lock);
1331 if (ptlrpc_import_delay_req(imp, req, &status)){
1332 /* put on delay list - only if we wait
1333 * recovery finished - before send */
1334 list_del_init(&req->rq_list);
1335 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1336 spin_unlock(&imp->imp_lock);
1341 req->rq_status = status;
1342 ptlrpc_rqphase_move(req,
1343 RQ_PHASE_INTERPRET);
1344 spin_unlock(&imp->imp_lock);
1345 GOTO(interpret, req->rq_status);
1347 if (req->rq_no_resend && !req->rq_wait_ctx) {
1348 req->rq_status = -ENOTCONN;
1349 ptlrpc_rqphase_move(req,
1350 RQ_PHASE_INTERPRET);
1351 spin_unlock(&imp->imp_lock);
1352 GOTO(interpret, req->rq_status);
1355 list_del_init(&req->rq_list);
1356 list_add_tail(&req->rq_list,
1357 &imp->imp_sending_list);
1359 spin_unlock(&imp->imp_lock);
1361 req->rq_waiting = 0;
1363 if (req->rq_timedout||req->rq_resend) {
1364 /* This is re-sending anyways,
1365 * let's mark req as resend. */
1370 if (!ptlrpc_unregister_bulk(req, 1))
1373 /* ensure previous bulk fails */
1374 old_xid = req->rq_xid;
1375 req->rq_xid = ptlrpc_next_xid();
1376 CDEBUG(D_HA, "resend bulk "
1379 old_xid, req->rq_xid);
1383 * rq_wait_ctx is only touched by ptlrpcd,
1384 * so no lock is needed here.
1386 status = sptlrpc_req_refresh_ctx(req, -1);
1389 req->rq_status = status;
1390 req->rq_wait_ctx = 0;
1391 force_timer_recalc = 1;
1393 req->rq_wait_ctx = 1;
1398 req->rq_wait_ctx = 0;
1401 rc = ptl_send_rpc(req, 0);
1403 DEBUG_REQ(D_HA, req, "send failed (%d)",
1405 force_timer_recalc = 1;
1406 req->rq_net_err = 1;
1408 /* need to reset the timeout */
1409 force_timer_recalc = 1;
1412 spin_lock(&req->rq_lock);
1414 if (ptlrpc_client_early(req)) {
1415 ptlrpc_at_recv_early_reply(req);
1416 spin_unlock(&req->rq_lock);
1420 /* Still waiting for a reply? */
1421 if (ptlrpc_client_recv(req)) {
1422 spin_unlock(&req->rq_lock);
1426 /* Did we actually receive a reply? */
1427 if (!ptlrpc_client_replied(req)) {
1428 spin_unlock(&req->rq_lock);
1432 spin_unlock(&req->rq_lock);
1434 req->rq_status = after_reply(req);
1438 /* If there is no bulk associated with this request,
1439 * then we're done and should let the interpreter
1440 * process the reply. Similarly if the RPC returned
1441 * an error, and therefore the bulk will never arrive.
1443 if (req->rq_bulk == NULL || req->rq_status != 0) {
1444 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1445 GOTO(interpret, req->rq_status);
1448 ptlrpc_rqphase_move(req, RQ_PHASE_BULK);
1451 LASSERT(req->rq_phase == RQ_PHASE_BULK);
1452 if (ptlrpc_client_bulk_active(req))
1455 if (!req->rq_bulk->bd_success) {
1456 /* The RPC reply arrived OK, but the bulk screwed
1457 * up! Dead weird since the server told us the RPC
1458 * was good after getting the REPLY for her GET or
1459 * the ACK for her PUT. */
1460 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1464 ptlrpc_rqphase_move(req, RQ_PHASE_INTERPRET);
1467 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
1469 /* This moves to "unregistering" phase we need to wait for
1471 if (!ptlrpc_unregister_reply(req, 1))
1474 if (!ptlrpc_unregister_bulk(req, 1))
1477 /* When calling interpret receiving already should be
1479 LASSERT(!req->rq_receiving_reply);
1481 ptlrpc_req_interpret(env, req, req->rq_status);
1483 ptlrpc_rqphase_move(req, RQ_PHASE_COMPLETE);
1485 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
1486 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1487 imp->imp_obd->obd_uuid.uuid,
1488 req->rq_reqmsg ? lustre_msg_get_status(req->rq_reqmsg):-1,
1490 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1491 req->rq_reqmsg ? lustre_msg_get_opc(req->rq_reqmsg) : -1);
1493 spin_lock(&imp->imp_lock);
1494 /* Request already may be not on sending or delaying list. This
1495 * may happen in the case of marking it erroneous for the case
1496 * ptlrpc_import_delay_req(req, status) find it impossible to
1497 * allow sending this rpc and returns *status != 0. */
1498 if (!list_empty(&req->rq_list)) {
1499 list_del_init(&req->rq_list);
1500 atomic_dec(&imp->imp_inflight);
1502 spin_unlock(&imp->imp_lock);
1504 set->set_remaining--;
1505 cfs_waitq_broadcast(&imp->imp_recovery_waitq);
1508 /* If we hit an error, we want to recover promptly. */
1509 RETURN(set->set_remaining == 0 || force_timer_recalc);
1512 /* Return 1 if we should give up, else 0 */
1513 int ptlrpc_expire_one_request(struct ptlrpc_request *req, int async_unlink)
1515 struct obd_import *imp = req->rq_import;
1519 spin_lock(&req->rq_lock);
1520 req->rq_timedout = 1;
1521 spin_unlock(&req->rq_lock);
1523 DEBUG_REQ(req->rq_fake ? D_INFO : D_WARNING, req,
1524 "Request x"LPU64" sent from %s to NID %s "CFS_DURATION_T"s "
1525 "ago has %s ("CFS_DURATION_T"s prior to deadline).\n",
1526 req->rq_xid, imp ? imp->imp_obd->obd_name : "<?>",
1527 imp ? libcfs_nid2str(imp->imp_connection->c_peer.nid) : "<?>",
1528 cfs_time_sub(cfs_time_current_sec(), req->rq_sent),
1529 req->rq_net_err ? "failed due to network error" : "timed out",
1530 cfs_time_sub(req->rq_deadline, req->rq_sent));
1532 if (imp != NULL && obd_debug_peer_on_timeout)
1533 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
1535 ptlrpc_unregister_reply(req, async_unlink);
1536 ptlrpc_unregister_bulk(req, async_unlink);
1538 if (obd_dump_on_timeout)
1539 libcfs_debug_dumplog();
1542 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
1549 atomic_inc(&imp->imp_timeouts);
1551 /* The DLM server doesn't want recovery run on its imports. */
1552 if (imp->imp_dlm_fake)
1555 /* If this request is for recovery or other primordial tasks,
1556 * then error it out here. */
1557 if (req->rq_ctx_init || req->rq_ctx_fini ||
1558 req->rq_send_state != LUSTRE_IMP_FULL ||
1559 imp->imp_obd->obd_no_recov) {
1560 DEBUG_REQ(D_RPCTRACE, req, "err -110, sent_state=%s (now=%s)",
1561 ptlrpc_import_state_name(req->rq_send_state),
1562 ptlrpc_import_state_name(imp->imp_state));
1563 spin_lock(&req->rq_lock);
1564 req->rq_status = -ETIMEDOUT;
1566 spin_unlock(&req->rq_lock);
1570 /* if a request can't be resent we can't wait for an answer after
1572 if (req->rq_no_resend) {
1573 DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
1577 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
1582 int ptlrpc_expired_set(void *data)
1584 struct ptlrpc_request_set *set = data;
1585 struct list_head *tmp;
1586 time_t now = cfs_time_current_sec();
1589 LASSERT(set != NULL);
1592 * A timeout expired. See which reqs it applies to...
1594 list_for_each (tmp, &set->set_requests) {
1595 struct ptlrpc_request *req =
1596 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1598 /* don't expire request waiting for context */
1599 if (req->rq_wait_ctx)
1602 /* Request in-flight? */
1603 if (!((req->rq_phase == RQ_PHASE_RPC &&
1604 !req->rq_waiting && !req->rq_resend) ||
1605 (req->rq_phase == RQ_PHASE_BULK)))
1608 if (req->rq_timedout || /* already dealt with */
1609 req->rq_deadline > now) /* not expired */
1612 /* Deal with this guy. Do it asynchronously to not block
1613 * ptlrpcd thread. */
1614 ptlrpc_expire_one_request(req, 1);
1618 * When waiting for a whole set, we always break out of the
1619 * sleep so we can recalculate the timeout, or enable interrupts
1620 * if everyone's timed out.
1625 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1627 spin_lock(&req->rq_lock);
1629 spin_unlock(&req->rq_lock);
1632 void ptlrpc_interrupted_set(void *data)
1634 struct ptlrpc_request_set *set = data;
1635 struct list_head *tmp;
1637 LASSERT(set != NULL);
1638 CERROR("INTERRUPTED SET %p\n", set);
1640 list_for_each(tmp, &set->set_requests) {
1641 struct ptlrpc_request *req =
1642 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1644 if (req->rq_phase != RQ_PHASE_RPC &&
1645 req->rq_phase != RQ_PHASE_UNREGISTERING)
1648 ptlrpc_mark_interrupted(req);
1653 * Get the smallest timeout in the set; this does NOT set a timeout.
1655 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1657 struct list_head *tmp;
1658 time_t now = cfs_time_current_sec();
1660 struct ptlrpc_request *req;
1664 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1666 list_for_each(tmp, &set->set_requests) {
1667 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1670 * Request in-flight?
1672 if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
1673 (req->rq_phase == RQ_PHASE_BULK) ||
1674 (req->rq_phase == RQ_PHASE_NEW)))
1678 * Already timed out.
1680 if (req->rq_timedout)
1686 if (req->rq_wait_ctx)
1689 if (req->rq_phase == RQ_PHASE_NEW)
1690 deadline = req->rq_sent;
1692 deadline = req->rq_sent + req->rq_timeout;
1694 if (deadline <= now) /* actually expired already */
1695 timeout = 1; /* ASAP */
1696 else if (timeout == 0 || timeout > deadline - now)
1697 timeout = deadline - now;
1702 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1704 struct list_head *tmp;
1705 struct ptlrpc_request *req;
1706 struct l_wait_info lwi;
1710 if (list_empty(&set->set_requests))
1713 list_for_each(tmp, &set->set_requests) {
1714 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1715 if (req->rq_phase == RQ_PHASE_NEW)
1716 (void)ptlrpc_send_new_req(req);
1720 timeout = ptlrpc_set_next_timeout(set);
1722 /* wait until all complete, interrupted, or an in-flight
1724 CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
1727 if (timeout == 0 && !cfs_signal_pending())
1729 * No requests are in-flight (ether timed out
1730 * or delayed), so we can allow interrupts.
1731 * We still want to block for a limited time,
1732 * so we allow interrupts during the timeout.
1734 lwi = LWI_TIMEOUT_INTR_ALL(cfs_time_seconds(1),
1736 ptlrpc_interrupted_set, set);
1739 * At least one request is in flight, so no
1740 * interrupts are allowed. Wait until all
1741 * complete, or an in-flight req times out.
1743 lwi = LWI_TIMEOUT(cfs_time_seconds(timeout? timeout : 1),
1744 ptlrpc_expired_set, set);
1746 rc = l_wait_event(set->set_waitq, ptlrpc_check_set(NULL, set), &lwi);
1748 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1750 /* -EINTR => all requests have been flagged rq_intr so next
1752 * -ETIMEDOUT => someone timed out. When all reqs have
1753 * timed out, signals are enabled allowing completion with
1755 * I don't really care if we go once more round the loop in
1756 * the error cases -eeb. */
1757 } while (rc != 0 || set->set_remaining != 0);
1759 LASSERT(set->set_remaining == 0);
1762 list_for_each(tmp, &set->set_requests) {
1763 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1765 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1766 if (req->rq_status != 0)
1767 rc = req->rq_status;
1770 if (set->set_interpret != NULL) {
1771 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1773 rc = interpreter (set, set->set_arg, rc);
1775 struct ptlrpc_set_cbdata *cbdata, *n;
1778 list_for_each_entry_safe(cbdata, n,
1779 &set->set_cblist, psc_item) {
1780 list_del_init(&cbdata->psc_item);
1781 err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
1784 OBD_FREE_PTR(cbdata);
1791 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1794 if (request == NULL) {
1799 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1800 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1801 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1802 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1803 LASSERTF(list_empty(&request->rq_exp_list), "req %p\n", request);
1804 LASSERTF(!request->rq_replay, "req %p\n", request);
1805 LASSERT(request->rq_cli_ctx || request->rq_fake);
1807 req_capsule_fini(&request->rq_pill);
1809 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1810 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1811 if (request->rq_import != NULL) {
1813 spin_lock(&request->rq_import->imp_lock);
1814 list_del_init(&request->rq_replay_list);
1816 spin_unlock(&request->rq_import->imp_lock);
1818 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1820 if (atomic_read(&request->rq_refcount) != 0) {
1821 DEBUG_REQ(D_ERROR, request,
1822 "freeing request with nonzero refcount");
1826 if (request->rq_repbuf != NULL)
1827 sptlrpc_cli_free_repbuf(request);
1828 if (request->rq_export != NULL) {
1829 class_export_put(request->rq_export);
1830 request->rq_export = NULL;
1832 if (request->rq_import != NULL) {
1833 class_import_put(request->rq_import);
1834 request->rq_import = NULL;
1836 if (request->rq_bulk != NULL)
1837 ptlrpc_free_bulk(request->rq_bulk);
1839 if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
1840 sptlrpc_cli_free_reqbuf(request);
1842 if (request->rq_cli_ctx)
1843 sptlrpc_req_put_ctx(request, !locked);
1845 if (request->rq_pool)
1846 __ptlrpc_free_req_to_pool(request);
1848 OBD_FREE(request, sizeof(*request));
1852 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1853 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1855 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1856 (void)__ptlrpc_req_finished(request, 1);
1859 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1862 if (request == NULL)
1865 if (request == LP_POISON ||
1866 request->rq_reqmsg == LP_POISON) {
1867 CERROR("dereferencing freed request (bug 575)\n");
1872 DEBUG_REQ(D_INFO, request, "refcount now %u",
1873 atomic_read(&request->rq_refcount) - 1);
1875 if (atomic_dec_and_test(&request->rq_refcount)) {
1876 __ptlrpc_free_req(request, locked);
1883 void ptlrpc_req_finished(struct ptlrpc_request *request)
1885 __ptlrpc_req_finished(request, 0);
1888 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1890 return request->rq_xid;
1892 EXPORT_SYMBOL(ptlrpc_req_xid);
1894 /* Disengage the client's reply buffer from the network
1895 * NB does _NOT_ unregister any client-side bulk.
1896 * IDEMPOTENT, but _not_ safe against concurrent callers.
1897 * The request owner (i.e. the thread doing the I/O) must call...
1899 int ptlrpc_unregister_reply(struct ptlrpc_request *request, int async)
1903 struct l_wait_info lwi;
1908 LASSERT(!in_interrupt());
1911 * Let's setup deadline for reply unlink.
1913 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
1914 async && request->rq_reply_deadline == 0)
1915 request->rq_reply_deadline = cfs_time_current_sec()+LONG_UNLINK;
1918 * Nothing left to do.
1920 if (!ptlrpc_client_recv_or_unlink(request))
1923 LNetMDUnlink(request->rq_reply_md_h);
1926 * Let's check it once again.
1928 if (!ptlrpc_client_recv_or_unlink(request))
1932 * Move to "Unregistering" phase as reply was not unlinked yet.
1934 ptlrpc_rqphase_move(request, RQ_PHASE_UNREGISTERING);
1937 * Do not wait for unlink to finish.
1943 * We have to l_wait_event() whatever the result, to give liblustre
1944 * a chance to run reply_in_callback(), and to make sure we've
1945 * unlinked before returning a req to the pool.
1947 if (request->rq_set != NULL)
1948 wq = &request->rq_set->set_waitq;
1950 wq = &request->rq_reply_waitq;
1953 /* Network access will complete in finite time but the HUGE
1954 * timeout lets us CWARN for visibility of sluggish NALs */
1955 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK),
1956 cfs_time_seconds(1), NULL, NULL);
1957 rc = l_wait_event(*wq, !ptlrpc_client_recv_or_unlink(request),
1960 ptlrpc_rqphase_move(request, request->rq_next_phase);
1964 LASSERT(rc == -ETIMEDOUT);
1965 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout "
1966 "rvcng=%d unlnk=%d", request->rq_receiving_reply,
1967 request->rq_must_unlink);
1972 /* caller must hold imp->imp_lock */
1973 void ptlrpc_free_committed(struct obd_import *imp)
1975 struct list_head *tmp, *saved;
1976 struct ptlrpc_request *req;
1977 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1980 LASSERT(imp != NULL);
1982 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1985 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1986 imp->imp_generation == imp->imp_last_generation_checked) {
1987 CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
1988 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1992 CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
1993 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1994 imp->imp_generation);
1995 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1996 imp->imp_last_generation_checked = imp->imp_generation;
1998 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1999 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
2001 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
2002 LASSERT(req != last_req);
2005 if (req->rq_transno == 0) {
2006 DEBUG_REQ(D_EMERG, req, "zero transno during replay");
2009 if (req->rq_import_generation < imp->imp_generation) {
2010 DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
2014 if (req->rq_replay) {
2015 DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
2019 /* not yet committed */
2020 if (req->rq_transno > imp->imp_peer_committed_transno) {
2021 DEBUG_REQ(D_RPCTRACE, req, "stopping search");
2025 DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
2026 imp->imp_peer_committed_transno);
2028 spin_lock(&req->rq_lock);
2030 spin_unlock(&req->rq_lock);
2031 if (req->rq_commit_cb != NULL)
2032 req->rq_commit_cb(req);
2033 list_del_init(&req->rq_replay_list);
2034 __ptlrpc_req_finished(req, 1);
2041 void ptlrpc_cleanup_client(struct obd_import *imp)
2048 void ptlrpc_resend_req(struct ptlrpc_request *req)
2050 DEBUG_REQ(D_HA, req, "going to resend");
2051 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
2052 req->rq_status = -EAGAIN;
2054 spin_lock(&req->rq_lock);
2056 req->rq_net_err = 0;
2057 req->rq_timedout = 0;
2059 __u64 old_xid = req->rq_xid;
2061 /* ensure previous bulk fails */
2062 req->rq_xid = ptlrpc_next_xid();
2063 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
2064 old_xid, req->rq_xid);
2066 ptlrpc_client_wake_req(req);
2067 spin_unlock(&req->rq_lock);
2070 /* XXX: this function and rq_status are currently unused */
2071 void ptlrpc_restart_req(struct ptlrpc_request *req)
2073 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
2074 req->rq_status = -ERESTARTSYS;
2076 spin_lock(&req->rq_lock);
2077 req->rq_restart = 1;
2078 req->rq_timedout = 0;
2079 ptlrpc_client_wake_req(req);
2080 spin_unlock(&req->rq_lock);
2083 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
2086 atomic_inc(&req->rq_refcount);
2090 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
2091 struct obd_import *imp)
2093 struct list_head *tmp;
2095 LASSERT_SPIN_LOCKED(&imp->imp_lock);
2097 if (req->rq_transno == 0) {
2098 DEBUG_REQ(D_EMERG, req, "saving request with zero transno");
2102 /* clear this for new requests that were resent as well
2103 as resent replayed requests. */
2104 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
2106 /* don't re-add requests that have been replayed */
2107 if (!list_empty(&req->rq_replay_list))
2110 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
2112 LASSERT(imp->imp_replayable);
2113 /* Balanced in ptlrpc_free_committed, usually. */
2114 ptlrpc_request_addref(req);
2115 list_for_each_prev(tmp, &imp->imp_replay_list) {
2116 struct ptlrpc_request *iter =
2117 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
2119 /* We may have duplicate transnos if we create and then
2120 * open a file, or for closes retained if to match creating
2121 * opens, so use req->rq_xid as a secondary key.
2122 * (See bugs 684, 685, and 428.)
2123 * XXX no longer needed, but all opens need transnos!
2125 if (iter->rq_transno > req->rq_transno)
2128 if (iter->rq_transno == req->rq_transno) {
2129 LASSERT(iter->rq_xid != req->rq_xid);
2130 if (iter->rq_xid > req->rq_xid)
2134 list_add(&req->rq_replay_list, &iter->rq_replay_list);
2138 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
2141 int ptlrpc_queue_wait(struct ptlrpc_request *req)
2143 struct ptlrpc_request_set *set;
2147 LASSERT(req->rq_set == NULL);
2148 LASSERT(!req->rq_receiving_reply);
2150 set = ptlrpc_prep_set();
2152 CERROR("Unable to allocate ptlrpc set.");
2156 /* for distributed debugging */
2157 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
2159 /* add a ref for the set (see comment in ptlrpc_set_add_req) */
2160 ptlrpc_request_addref(req);
2161 ptlrpc_set_add_req(set, req);
2162 rc = ptlrpc_set_wait(set);
2163 ptlrpc_set_destroy(set);
2168 struct ptlrpc_replay_async_args {
2170 int praa_old_status;
2173 static int ptlrpc_replay_interpret(const struct lu_env *env,
2174 struct ptlrpc_request *req,
2175 void * data, int rc)
2177 struct ptlrpc_replay_async_args *aa = data;
2178 struct obd_import *imp = req->rq_import;
2181 atomic_dec(&imp->imp_replay_inflight);
2183 if (!ptlrpc_client_replied(req)) {
2184 CERROR("request replay timed out, restarting recovery\n");
2185 GOTO(out, rc = -ETIMEDOUT);
2188 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
2189 (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
2190 lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
2191 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
2193 /** VBR: check version failure */
2194 if (lustre_msg_get_status(req->rq_repmsg) == -EOVERFLOW) {
2195 /** replay was failed due to version mismatch */
2196 DEBUG_REQ(D_WARNING, req, "Version mismatch during replay\n");
2197 spin_lock(&imp->imp_lock);
2198 imp->imp_vbr_failed = 1;
2199 imp->imp_no_lock_replay = 1;
2200 spin_unlock(&imp->imp_lock);
2202 /** The transno had better not change over replay. */
2203 LASSERTF(lustre_msg_get_transno(req->rq_reqmsg) ==
2204 lustre_msg_get_transno(req->rq_repmsg) ||
2205 lustre_msg_get_transno(req->rq_repmsg) == 0,
2207 lustre_msg_get_transno(req->rq_reqmsg),
2208 lustre_msg_get_transno(req->rq_repmsg));
2211 spin_lock(&imp->imp_lock);
2212 /** if replays by version then gap was occur on server, no trust to locks */
2213 if (lustre_msg_get_flags(req->rq_repmsg) & MSG_VERSION_REPLAY)
2214 imp->imp_no_lock_replay = 1;
2215 imp->imp_last_replay_transno = lustre_msg_get_transno(req->rq_reqmsg);
2216 spin_unlock(&imp->imp_lock);
2217 LASSERT(imp->imp_last_replay_transno);
2219 DEBUG_REQ(D_HA, req, "got rep");
2221 /* let the callback do fixups, possibly including in the request */
2222 if (req->rq_replay_cb)
2223 req->rq_replay_cb(req);
2225 if (ptlrpc_client_replied(req) &&
2226 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
2227 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
2228 lustre_msg_get_status(req->rq_repmsg),
2229 aa->praa_old_status);
2231 /* Put it back for re-replay. */
2232 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
2236 * Errors while replay can set transno to 0, but
2237 * imp_last_replay_transno shouldn't be set to 0 anyway
2239 if (req->rq_transno > 0) {
2240 spin_lock(&imp->imp_lock);
2241 LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
2242 imp->imp_last_replay_transno = req->rq_transno;
2243 spin_unlock(&imp->imp_lock);
2245 CERROR("Transno is 0 during replay!\n");
2246 /* continue with recovery */
2247 rc = ptlrpc_import_recovery_state_machine(imp);
2249 req->rq_send_state = aa->praa_old_state;
2252 /* this replay failed, so restart recovery */
2253 ptlrpc_connect_import(imp, NULL);
2258 int ptlrpc_replay_req(struct ptlrpc_request *req)
2260 struct ptlrpc_replay_async_args *aa;
2263 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
2264 /* Not handling automatic bulk replay yet (or ever?) */
2265 LASSERT(req->rq_bulk == NULL);
2267 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
2268 aa = ptlrpc_req_async_args(req);
2269 memset(aa, 0, sizeof *aa);
2271 /* Prepare request to be resent with ptlrpcd */
2272 aa->praa_old_state = req->rq_send_state;
2273 req->rq_send_state = LUSTRE_IMP_REPLAY;
2274 req->rq_phase = RQ_PHASE_NEW;
2275 req->rq_next_phase = RQ_PHASE_UNDEFINED;
2277 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
2279 req->rq_interpret_reply = ptlrpc_replay_interpret;
2280 /* Readjust the timeout for current conditions */
2281 ptlrpc_at_set_req_timeout(req);
2283 DEBUG_REQ(D_HA, req, "REPLAY");
2285 atomic_inc(&req->rq_import->imp_replay_inflight);
2286 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
2288 ptlrpcd_add_req(req, PSCOPE_OTHER);
2292 void ptlrpc_abort_inflight(struct obd_import *imp)
2294 struct list_head *tmp, *n;
2297 /* Make sure that no new requests get processed for this import.
2298 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
2299 * this flag and then putting requests on sending_list or delayed_list.
2301 spin_lock(&imp->imp_lock);
2303 /* XXX locking? Maybe we should remove each request with the list
2304 * locked? Also, how do we know if the requests on the list are
2305 * being freed at this time?
2307 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
2308 struct ptlrpc_request *req =
2309 list_entry(tmp, struct ptlrpc_request, rq_list);
2311 DEBUG_REQ(D_RPCTRACE, req, "inflight");
2313 spin_lock (&req->rq_lock);
2314 if (req->rq_import_generation < imp->imp_generation) {
2316 req->rq_status = -EINTR;
2317 ptlrpc_client_wake_req(req);
2319 spin_unlock (&req->rq_lock);
2322 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
2323 struct ptlrpc_request *req =
2324 list_entry(tmp, struct ptlrpc_request, rq_list);
2326 DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
2328 spin_lock (&req->rq_lock);
2329 if (req->rq_import_generation < imp->imp_generation) {
2331 req->rq_status = -EINTR;
2332 ptlrpc_client_wake_req(req);
2334 spin_unlock (&req->rq_lock);
2337 /* Last chance to free reqs left on the replay list, but we
2338 * will still leak reqs that haven't committed. */
2339 if (imp->imp_replayable)
2340 ptlrpc_free_committed(imp);
2342 spin_unlock(&imp->imp_lock);
2347 void ptlrpc_abort_set(struct ptlrpc_request_set *set)
2349 struct list_head *tmp, *pos;
2351 LASSERT(set != NULL);
2353 list_for_each_safe(pos, tmp, &set->set_requests) {
2354 struct ptlrpc_request *req =
2355 list_entry(pos, struct ptlrpc_request, rq_set_chain);
2357 spin_lock(&req->rq_lock);
2358 if (req->rq_phase != RQ_PHASE_RPC) {
2359 spin_unlock(&req->rq_lock);
2364 req->rq_status = -EINTR;
2365 ptlrpc_client_wake_req(req);
2366 spin_unlock(&req->rq_lock);
2370 static __u64 ptlrpc_last_xid;
2371 static spinlock_t ptlrpc_last_xid_lock;
2373 /* Initialize the XID for the node. This is common among all requests on
2374 * this node, and only requires the property that it is monotonically
2375 * increasing. It does not need to be sequential. Since this is also used
2376 * as the RDMA match bits, it is important that a single client NOT have
2377 * the same match bits for two different in-flight requests, hence we do
2378 * NOT want to have an XID per target or similar.
2380 * To avoid an unlikely collision between match bits after a client reboot
2381 * (which would deliver old data into the wrong RDMA buffer) initialize
2382 * the XID based on the current time, assuming a maximum RPC rate of 1M RPC/s.
2383 * If the time is clearly incorrect, we instead use a 62-bit random number.
2384 * In the worst case the random number will overflow 1M RPCs per second in
2385 * 9133 years, or permutations thereof.
2387 #define YEAR_2004 (1ULL << 30)
2388 void ptlrpc_init_xid(void)
2390 time_t now = cfs_time_current_sec();
2392 spin_lock_init(&ptlrpc_last_xid_lock);
2393 if (now < YEAR_2004) {
2394 ll_get_random_bytes(&ptlrpc_last_xid, sizeof(ptlrpc_last_xid));
2395 ptlrpc_last_xid >>= 2;
2396 ptlrpc_last_xid |= (1ULL << 61);
2398 ptlrpc_last_xid = (__u64)now << 20;
2402 __u64 ptlrpc_next_xid(void)
2405 spin_lock(&ptlrpc_last_xid_lock);
2406 tmp = ++ptlrpc_last_xid;
2407 spin_unlock(&ptlrpc_last_xid_lock);
2411 __u64 ptlrpc_sample_next_xid(void)
2413 #if BITS_PER_LONG == 32
2414 /* need to avoid possible word tearing on 32-bit systems */
2416 spin_lock(&ptlrpc_last_xid_lock);
2417 tmp = ptlrpc_last_xid + 1;
2418 spin_unlock(&ptlrpc_last_xid_lock);
2421 /* No need to lock, since returned value is racy anyways */
2422 return ptlrpc_last_xid + 1;
2425 EXPORT_SYMBOL(ptlrpc_sample_next_xid);