1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
6 * This file is part of the Lustre file system, http://www.lustre.org
7 * Lustre is a trademark of Cluster File Systems, Inc.
9 * You may have signed or agreed to another license before downloading
10 * this software. If so, you are bound by the terms and conditions
11 * of that agreement, and the following does not apply to you. See the
12 * LICENSE file included with this distribution for more information.
14 * If you did not agree to a different license, then this copy of Lustre
15 * is open source software; you can redistribute it and/or modify it
16 * under the terms of version 2 of the GNU General Public License as
17 * published by the Free Software Foundation.
19 * In either case, Lustre is distributed in the hope that it will be
20 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
21 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * license text for more details.
26 #define DEBUG_SUBSYSTEM S_RPC
30 #include <liblustre.h>
33 #include <obd_support.h>
34 #include <obd_class.h>
35 #include <lustre_lib.h>
36 #include <lustre_ha.h>
37 #include <lustre_import.h>
39 #include "ptlrpc_internal.h"
41 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
42 struct ptlrpc_client *cl)
44 cl->cli_request_portal = req_portal;
45 cl->cli_reply_portal = rep_portal;
49 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid)
51 struct ptlrpc_connection *c;
53 lnet_process_id_t peer;
56 err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
58 CERROR("cannot find peer %s!\n", uuid->uuid);
62 c = ptlrpc_get_connection(peer, self, uuid);
64 memcpy(c->c_remote_uuid.uuid,
65 uuid->uuid, sizeof(c->c_remote_uuid.uuid));
68 CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c);
73 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,
74 struct obd_uuid *uuid)
77 lnet_process_id_t peer;
80 err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
82 CERROR("cannot find peer %s!\n", uuid->uuid);
91 static inline struct ptlrpc_bulk_desc *new_bulk(int npages, int type, int portal)
93 struct ptlrpc_bulk_desc *desc;
95 OBD_ALLOC(desc, offsetof (struct ptlrpc_bulk_desc, bd_iov[npages]));
99 spin_lock_init(&desc->bd_lock);
100 cfs_waitq_init(&desc->bd_waitq);
101 desc->bd_max_iov = npages;
102 desc->bd_iov_count = 0;
103 desc->bd_md_h = LNET_INVALID_HANDLE;
104 desc->bd_portal = portal;
105 desc->bd_type = type;
110 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
111 int npages, int type, int portal)
113 struct obd_import *imp = req->rq_import;
114 struct ptlrpc_bulk_desc *desc;
117 LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
118 desc = new_bulk(npages, type, portal);
122 desc->bd_import_generation = req->rq_import_generation;
123 desc->bd_import = class_import_get(imp);
126 desc->bd_cbid.cbid_fn = client_bulk_callback;
127 desc->bd_cbid.cbid_arg = desc;
129 /* This makes req own desc, and free it when she frees herself */
135 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp (struct ptlrpc_request *req,
136 int npages, int type, int portal)
138 struct obd_export *exp = req->rq_export;
139 struct ptlrpc_bulk_desc *desc;
142 LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK);
144 desc = new_bulk(npages, type, portal);
148 desc->bd_export = class_export_get(exp);
151 desc->bd_cbid.cbid_fn = server_bulk_callback;
152 desc->bd_cbid.cbid_arg = desc;
154 /* NB we don't assign rq_bulk here; server-side requests are
155 * re-used, and the handler frees the bulk desc explicitly. */
160 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
161 cfs_page_t *page, int pageoffset, int len)
163 LASSERT(desc->bd_iov_count < desc->bd_max_iov);
164 LASSERT(page != NULL);
165 LASSERT(pageoffset >= 0);
167 LASSERT(pageoffset + len <= CFS_PAGE_SIZE);
171 ptlrpc_add_bulk_page(desc, page, pageoffset, len);
174 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
178 LASSERT(desc != NULL);
179 LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
180 LASSERT(!desc->bd_network_rw); /* network hands off or */
181 LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
183 class_export_put(desc->bd_export);
185 class_import_put(desc->bd_import);
187 OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc,
188 bd_iov[desc->bd_max_iov]));
192 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
194 struct list_head *l, *tmp;
195 struct ptlrpc_request *req;
200 list_for_each_safe(l, tmp, &pool->prp_req_list) {
201 req = list_entry(l, struct ptlrpc_request, rq_list);
202 list_del(&req->rq_list);
203 LASSERT (req->rq_reqmsg);
204 OBD_FREE(req->rq_reqmsg, pool->prp_rq_size);
205 OBD_FREE(req, sizeof(*req));
207 OBD_FREE(pool, sizeof(*pool));
210 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
215 while (size < pool->prp_rq_size)
218 LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
219 "Trying to change pool size with nonempty pool "
220 "from %d to %d bytes\n", pool->prp_rq_size, size);
222 spin_lock(&pool->prp_lock);
223 pool->prp_rq_size = size;
224 for (i = 0; i < num_rq; i++) {
225 struct ptlrpc_request *req;
226 struct lustre_msg *msg;
228 spin_unlock(&pool->prp_lock);
229 OBD_ALLOC(req, sizeof(struct ptlrpc_request));
232 OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
234 OBD_FREE(req, sizeof(struct ptlrpc_request));
237 req->rq_reqmsg = msg;
239 spin_lock(&pool->prp_lock);
240 list_add_tail(&req->rq_list, &pool->prp_req_list);
242 spin_unlock(&pool->prp_lock);
246 struct ptlrpc_request_pool *ptlrpc_init_rq_pool(int num_rq, int msgsize,
247 void (*populate_pool)(struct ptlrpc_request_pool *, int))
249 struct ptlrpc_request_pool *pool;
251 OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
255 /* Request next power of two for the allocation, because internally
256 kernel would do exactly this */
258 spin_lock_init(&pool->prp_lock);
259 CFS_INIT_LIST_HEAD(&pool->prp_req_list);
260 pool->prp_rq_size = msgsize;
261 pool->prp_populate = populate_pool;
263 populate_pool(pool, num_rq);
265 if (list_empty(&pool->prp_req_list)) {
266 /* have not allocated a single request for the pool */
267 OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
273 static struct ptlrpc_request *ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
275 struct ptlrpc_request *request;
276 struct lustre_msg *reqmsg;
281 spin_lock(&pool->prp_lock);
283 /* See if we have anything in a pool, and bail out if nothing,
284 * in writeout path, where this matters, this is safe to do, because
285 * nothing is lost in this case, and when some in-flight requests
286 * complete, this code will be called again. */
287 if (unlikely(list_empty(&pool->prp_req_list))) {
288 spin_unlock(&pool->prp_lock);
292 request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
294 list_del(&request->rq_list);
295 spin_unlock(&pool->prp_lock);
297 LASSERT(request->rq_reqmsg);
298 LASSERT(request->rq_pool);
300 reqmsg = request->rq_reqmsg;
301 memset(request, 0, sizeof(*request));
302 request->rq_reqmsg = reqmsg;
303 request->rq_pool = pool;
304 request->rq_reqlen = pool->prp_rq_size;
308 struct ptlrpc_request *
309 ptlrpc_prep_req_pool(struct obd_import *imp, __u32 version, int opcode,
310 int count, int *lengths, char **bufs,
311 struct ptlrpc_request_pool *pool)
313 struct ptlrpc_request *request = NULL;
317 /* The obd disconnected */
321 LASSERT(imp != LP_POISON);
322 LASSERT((unsigned long)imp->imp_client > 0x1000);
323 LASSERT(imp->imp_client != LP_POISON);
326 request = ptlrpc_prep_req_from_pool(pool);
329 OBD_ALLOC(request, sizeof(*request));
332 CERROR("request allocation out of memory\n");
336 rc = lustre_pack_request(request, imp->imp_msg_magic, count, lengths,
339 LASSERT(!request->rq_pool);
340 OBD_FREE(request, sizeof(*request));
344 lustre_msg_add_version(request->rq_reqmsg, version);
346 if (imp->imp_server_timeout)
347 request->rq_timeout = obd_timeout / 2;
349 request->rq_timeout = obd_timeout;
350 request->rq_send_state = LUSTRE_IMP_FULL;
351 request->rq_type = PTL_RPC_MSG_REQUEST;
352 request->rq_import = class_import_get(imp);
353 request->rq_export = NULL;
355 request->rq_req_cbid.cbid_fn = request_out_callback;
356 request->rq_req_cbid.cbid_arg = request;
358 request->rq_reply_cbid.cbid_fn = reply_in_callback;
359 request->rq_reply_cbid.cbid_arg = request;
361 request->rq_phase = RQ_PHASE_NEW;
363 /* XXX FIXME bug 249 */
364 request->rq_request_portal = imp->imp_client->cli_request_portal;
365 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
367 spin_lock_init(&request->rq_lock);
368 CFS_INIT_LIST_HEAD(&request->rq_list);
369 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
370 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
371 cfs_waitq_init(&request->rq_reply_waitq);
372 request->rq_xid = ptlrpc_next_xid();
373 atomic_set(&request->rq_refcount, 1);
375 lustre_msg_set_opc(request->rq_reqmsg, opcode);
376 lustre_msg_set_flags(request->rq_reqmsg, 0);
381 struct ptlrpc_request *
382 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
383 int *lengths, char **bufs)
385 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
389 struct ptlrpc_request_set *ptlrpc_prep_set(void)
391 struct ptlrpc_request_set *set;
394 OBD_ALLOC(set, sizeof *set);
397 CFS_INIT_LIST_HEAD(&set->set_requests);
398 cfs_waitq_init(&set->set_waitq);
399 set->set_remaining = 0;
400 spin_lock_init(&set->set_new_req_lock);
401 CFS_INIT_LIST_HEAD(&set->set_new_requests);
406 /* Finish with this set; opposite of prep_set. */
407 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
409 struct list_head *tmp;
410 struct list_head *next;
415 /* Requests on the set should either all be completed, or all be new */
416 expected_phase = (set->set_remaining == 0) ?
417 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
418 list_for_each (tmp, &set->set_requests) {
419 struct ptlrpc_request *req =
420 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
422 LASSERT(req->rq_phase == expected_phase);
426 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
428 list_for_each_safe(tmp, next, &set->set_requests) {
429 struct ptlrpc_request *req =
430 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
431 list_del_init(&req->rq_set_chain);
433 LASSERT(req->rq_phase == expected_phase);
435 if (req->rq_phase == RQ_PHASE_NEW) {
437 if (req->rq_interpret_reply != NULL) {
438 int (*interpreter)(struct ptlrpc_request *,
440 req->rq_interpret_reply;
442 /* higher level (i.e. LOV) failed;
443 * let the sub reqs clean up */
444 req->rq_status = -EBADR;
445 interpreter(req, &req->rq_async_args,
448 set->set_remaining--;
452 ptlrpc_req_finished (req);
455 LASSERT(set->set_remaining == 0);
457 OBD_FREE(set, sizeof(*set));
461 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
462 struct ptlrpc_request *req)
464 /* The set takes over the caller's request reference */
465 list_add_tail(&req->rq_set_chain, &set->set_requests);
467 set->set_remaining++;
469 atomic_inc(&req->rq_import->imp_inflight);
472 /* lock so many callers can add things, the context that owns the set
473 * is supposed to notice these and move them into the set proper. */
474 void ptlrpc_set_add_new_req(struct ptlrpc_request_set *set,
475 struct ptlrpc_request *req)
477 spin_lock(&set->set_new_req_lock);
478 /* The set takes over the caller's request reference */
479 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
481 spin_unlock(&set->set_new_req_lock);
485 * Based on the current state of the import, determine if the request
486 * can be sent, is an error, or should be delayed.
488 * Returns true if this request should be delayed. If false, and
489 * *status is set, then the request can not be sent and *status is the
490 * error code. If false and status is 0, then request can be sent.
492 * The imp->imp_lock must be held.
494 static int ptlrpc_import_delay_req(struct obd_import *imp,
495 struct ptlrpc_request *req, int *status)
500 LASSERT (status != NULL);
503 if (imp->imp_state == LUSTRE_IMP_NEW) {
504 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
507 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
508 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
510 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
511 imp->imp_state == LUSTRE_IMP_CONNECTING) {
512 /* allow CONNECT even if import is invalid */ ;
513 } else if (imp->imp_invalid) {
514 /* If the import has been invalidated (such as by an OST
515 * failure), the request must fail with -EIO. */
516 if (!imp->imp_deactive)
517 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
519 } else if (req->rq_import_generation != imp->imp_generation) {
520 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
522 } else if (req->rq_send_state != imp->imp_state) {
523 if (imp->imp_obd->obd_no_recov || imp->imp_dlm_fake ||
525 *status = -EWOULDBLOCK;
533 static int ptlrpc_check_reply(struct ptlrpc_request *req)
538 /* serialise with network callback */
539 spin_lock(&req->rq_lock);
544 if (req->rq_net_err && !req->rq_timedout) {
545 spin_unlock(&req->rq_lock);
546 rc = ptlrpc_expire_one_request(req);
547 spin_lock(&req->rq_lock);
561 spin_unlock(&req->rq_lock);
562 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
566 static int ptlrpc_check_status(struct ptlrpc_request *req)
571 err = lustre_msg_get_status(req->rq_repmsg);
572 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
573 DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err == %d",
575 RETURN(err < 0 ? err : -EINVAL);
579 DEBUG_REQ(D_INFO, req, "status is %d", err);
580 } else if (err > 0) {
581 /* XXX: translate this error from net to host */
582 DEBUG_REQ(D_INFO, req, "status is %d", err);
588 static int after_reply(struct ptlrpc_request *req)
590 struct obd_import *imp = req->rq_import;
594 LASSERT(!req->rq_receiving_reply);
596 /* NB Until this point, the whole of the incoming message,
597 * including buflens, status etc is in the sender's byte order. */
600 /* Clear reply swab mask; this is a new reply in sender's byte order */
601 req->rq_rep_swab_mask = 0;
603 LASSERT (req->rq_nob_received <= req->rq_replen);
604 rc = lustre_unpack_msg(req->rq_repmsg, req->rq_nob_received);
606 DEBUG_REQ(D_ERROR, req, "unpack_rep failed: %d\n", rc);
610 rc = lustre_unpack_rep_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
612 DEBUG_REQ(D_ERROR, req, "unpack ptlrpc body failed: %d\n", rc);
616 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
617 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
618 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)\n",
619 lustre_msg_get_type(req->rq_repmsg));
623 rc = ptlrpc_check_status(req);
625 /* Either we've been evicted, or the server has failed for
626 * some reason. Try to reconnect, and if that fails, punt to the
628 if ((rc == -ENOTCONN) || (rc == -ENODEV)) {
629 if (req->rq_send_state != LUSTRE_IMP_FULL ||
630 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
634 ptlrpc_request_handle_notconn(req);
639 /* Store transno in reqmsg for replay. */
640 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
641 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
643 if (req->rq_import->imp_replayable) {
644 spin_lock(&imp->imp_lock);
645 /* no point in adding already-committed requests to the replay
646 * list, we will just remove them immediately. b=9829 */
647 if (req->rq_transno != 0 &&
649 lustre_msg_get_last_committed(req->rq_repmsg) ||
651 ptlrpc_retain_replayable_request(req, imp);
652 else if (req->rq_commit_cb != NULL) {
653 spin_unlock(&imp->imp_lock);
654 req->rq_commit_cb(req);
655 spin_lock(&imp->imp_lock);
658 /* Replay-enabled imports return commit-status information. */
659 if (lustre_msg_get_last_committed(req->rq_repmsg))
660 imp->imp_peer_committed_transno =
661 lustre_msg_get_last_committed(req->rq_repmsg);
662 ptlrpc_free_committed(imp);
663 spin_unlock(&imp->imp_lock);
669 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
671 struct obd_import *imp;
675 LASSERT(req->rq_phase == RQ_PHASE_NEW);
676 req->rq_phase = RQ_PHASE_RPC;
678 imp = req->rq_import;
679 spin_lock(&imp->imp_lock);
681 req->rq_import_generation = imp->imp_generation;
683 if (ptlrpc_import_delay_req(imp, req, &rc)) {
684 spin_lock (&req->rq_lock);
686 spin_unlock (&req->rq_lock);
688 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
690 lustre_msg_get_status(req->rq_reqmsg) ,
691 ptlrpc_import_state_name(req->rq_send_state),
692 ptlrpc_import_state_name(imp->imp_state));
693 LASSERT(list_empty (&req->rq_list));
695 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
696 spin_unlock(&imp->imp_lock);
701 spin_unlock(&imp->imp_lock);
703 req->rq_phase = RQ_PHASE_INTERPRET;
707 /* XXX this is the same as ptlrpc_queue_wait */
708 LASSERT(list_empty(&req->rq_list));
709 list_add_tail(&req->rq_list, &imp->imp_sending_list);
710 spin_unlock(&imp->imp_lock);
712 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
713 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
714 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
715 imp->imp_obd->obd_uuid.uuid,
716 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
717 libcfs_nid2str(imp->imp_connection->c_peer.nid),
718 lustre_msg_get_opc(req->rq_reqmsg));
720 rc = ptl_send_rpc(req, 0);
722 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
729 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
730 int ptlrpc_check_set(struct ptlrpc_request_set *set)
732 struct list_head *tmp;
733 int force_timer_recalc = 0;
736 if (set->set_remaining == 0)
739 list_for_each(tmp, &set->set_requests) {
740 struct ptlrpc_request *req =
741 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
742 struct obd_import *imp = req->rq_import;
745 if (req->rq_phase == RQ_PHASE_NEW &&
746 ptlrpc_send_new_req(req)) {
747 force_timer_recalc = 1;
750 if (!(req->rq_phase == RQ_PHASE_RPC ||
751 req->rq_phase == RQ_PHASE_BULK ||
752 req->rq_phase == RQ_PHASE_INTERPRET ||
753 req->rq_phase == RQ_PHASE_COMPLETE)) {
754 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
758 if (req->rq_phase == RQ_PHASE_COMPLETE)
761 if (req->rq_phase == RQ_PHASE_INTERPRET)
762 GOTO(interpret, req->rq_status);
764 if (req->rq_net_err && !req->rq_timedout)
765 ptlrpc_expire_one_request(req);
768 ptlrpc_unregister_reply(req);
769 if (req->rq_status == 0)
770 req->rq_status = -EIO;
771 req->rq_phase = RQ_PHASE_INTERPRET;
773 spin_lock(&imp->imp_lock);
774 list_del_init(&req->rq_list);
775 spin_unlock(&imp->imp_lock);
777 GOTO(interpret, req->rq_status);
780 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
781 * will only be set after rq_timedout, but the oig waiting
782 * path sets rq_intr irrespective of whether ptlrpcd has
783 * seen a timeout. our policy is to only interpret
784 * interrupted rpcs after they have timed out */
785 if (req->rq_intr && (req->rq_timedout || req->rq_waiting)) {
786 /* NB could be on delayed list */
787 ptlrpc_unregister_reply(req);
788 req->rq_status = -EINTR;
789 req->rq_phase = RQ_PHASE_INTERPRET;
791 spin_lock(&imp->imp_lock);
792 list_del_init(&req->rq_list);
793 spin_unlock(&imp->imp_lock);
795 GOTO(interpret, req->rq_status);
798 if (req->rq_phase == RQ_PHASE_RPC) {
799 if (req->rq_timedout||req->rq_waiting||req->rq_resend) {
802 ptlrpc_unregister_reply(req);
804 spin_lock(&imp->imp_lock);
806 if (ptlrpc_import_delay_req(imp, req, &status)){
807 spin_unlock(&imp->imp_lock);
811 list_del_init(&req->rq_list);
813 req->rq_status = status;
814 req->rq_phase = RQ_PHASE_INTERPRET;
815 spin_unlock(&imp->imp_lock);
816 GOTO(interpret, req->rq_status);
818 if (req->rq_no_resend) {
819 req->rq_status = -ENOTCONN;
820 req->rq_phase = RQ_PHASE_INTERPRET;
821 spin_unlock(&imp->imp_lock);
822 GOTO(interpret, req->rq_status);
824 list_add_tail(&req->rq_list,
825 &imp->imp_sending_list);
827 spin_unlock(&imp->imp_lock);
830 if (req->rq_resend) {
831 lustre_msg_add_flags(req->rq_reqmsg,
834 __u64 old_xid = req->rq_xid;
836 ptlrpc_unregister_bulk (req);
838 /* ensure previous bulk fails */
839 req->rq_xid = ptlrpc_next_xid();
840 CDEBUG(D_HA, "resend bulk "
843 old_xid, req->rq_xid);
847 rc = ptl_send_rpc(req, 0);
849 DEBUG_REQ(D_HA, req, "send failed (%d)",
851 force_timer_recalc = 1;
854 /* need to reset the timeout */
855 force_timer_recalc = 1;
858 /* Still waiting for a reply? */
859 if (ptlrpc_client_receiving_reply(req))
862 /* Did we actually receive a reply? */
863 if (!ptlrpc_client_replied(req))
866 spin_lock(&imp->imp_lock);
867 list_del_init(&req->rq_list);
868 spin_unlock(&imp->imp_lock);
870 req->rq_status = after_reply(req);
871 if (req->rq_resend) {
872 /* Add this req to the delayed list so
873 it can be errored if the import is
874 evicted after recovery. */
875 spin_lock(&req->rq_lock);
876 list_add_tail(&req->rq_list,
877 &imp->imp_delayed_list);
878 spin_unlock(&req->rq_lock);
882 /* If there is no bulk associated with this request,
883 * then we're done and should let the interpreter
884 * process the reply. Similarly if the RPC returned
885 * an error, and therefore the bulk will never arrive.
887 if (req->rq_bulk == NULL || req->rq_status != 0) {
888 req->rq_phase = RQ_PHASE_INTERPRET;
889 GOTO(interpret, req->rq_status);
892 req->rq_phase = RQ_PHASE_BULK;
895 LASSERT(req->rq_phase == RQ_PHASE_BULK);
896 if (ptlrpc_bulk_active(req->rq_bulk))
899 if (!req->rq_bulk->bd_success) {
900 /* The RPC reply arrived OK, but the bulk screwed
901 * up! Dead wierd since the server told us the RPC
902 * was good after getting the REPLY for her GET or
903 * the ACK for her PUT. */
904 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
908 req->rq_phase = RQ_PHASE_INTERPRET;
911 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
912 LASSERT(!req->rq_receiving_reply);
914 ptlrpc_unregister_reply(req);
915 if (req->rq_bulk != NULL)
916 ptlrpc_unregister_bulk (req);
918 req->rq_phase = RQ_PHASE_COMPLETE;
920 if (req->rq_interpret_reply != NULL) {
921 int (*interpreter)(struct ptlrpc_request *,void *,int) =
922 req->rq_interpret_reply;
923 req->rq_status = interpreter(req, &req->rq_async_args,
927 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
928 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
929 imp->imp_obd->obd_uuid.uuid,
930 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
931 libcfs_nid2str(imp->imp_connection->c_peer.nid),
932 lustre_msg_get_opc(req->rq_reqmsg));
934 set->set_remaining--;
936 atomic_dec(&imp->imp_inflight);
937 cfs_waitq_signal(&imp->imp_recovery_waitq);
940 /* If we hit an error, we want to recover promptly. */
941 RETURN(set->set_remaining == 0 || force_timer_recalc);
944 int ptlrpc_expire_one_request(struct ptlrpc_request *req)
946 struct obd_import *imp = req->rq_import;
949 DEBUG_REQ(D_ERROR|D_NETERROR, req, "timeout (sent at %lu, %lus ago)",
950 (long)req->rq_sent, CURRENT_SECONDS - req->rq_sent);
952 /* Leave this out normally: it creates too much console noise and we
953 * only need it when we're debugging networks */
955 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
957 spin_lock(&req->rq_lock);
958 req->rq_timedout = 1;
959 spin_unlock(&req->rq_lock);
961 ptlrpc_unregister_reply (req);
963 if (obd_dump_on_timeout)
964 libcfs_debug_dumplog();
966 if (req->rq_bulk != NULL)
967 ptlrpc_unregister_bulk (req);
970 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
974 /* The DLM server doesn't want recovery run on its imports. */
975 if (imp->imp_dlm_fake)
978 /* If this request is for recovery or other primordial tasks,
979 * then error it out here. */
980 if (req->rq_send_state != LUSTRE_IMP_FULL ||
981 imp->imp_obd->obd_no_recov) {
982 spin_lock(&req->rq_lock);
983 req->rq_status = -ETIMEDOUT;
985 spin_unlock(&req->rq_lock);
989 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
994 int ptlrpc_expired_set(void *data)
996 struct ptlrpc_request_set *set = data;
997 struct list_head *tmp;
998 time_t now = CURRENT_SECONDS;
1001 LASSERT(set != NULL);
1003 /* A timeout expired; see which reqs it applies to... */
1004 list_for_each (tmp, &set->set_requests) {
1005 struct ptlrpc_request *req =
1006 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1008 /* request in-flight? */
1009 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting &&
1011 (req->rq_phase == RQ_PHASE_BULK)))
1014 if (req->rq_timedout || /* already dealt with */
1015 req->rq_sent + req->rq_timeout > now) /* not expired */
1018 /* deal with this guy */
1019 ptlrpc_expire_one_request (req);
1022 /* When waiting for a whole set, we always to break out of the
1023 * sleep so we can recalculate the timeout, or enable interrupts
1024 * iff everyone's timed out.
1029 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1031 spin_lock(&req->rq_lock);
1033 spin_unlock(&req->rq_lock);
1036 void ptlrpc_interrupted_set(void *data)
1038 struct ptlrpc_request_set *set = data;
1039 struct list_head *tmp;
1041 LASSERT(set != NULL);
1042 CERROR("INTERRUPTED SET %p\n", set);
1044 list_for_each(tmp, &set->set_requests) {
1045 struct ptlrpc_request *req =
1046 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1048 if (req->rq_phase != RQ_PHASE_RPC)
1051 ptlrpc_mark_interrupted(req);
1055 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1057 struct list_head *tmp;
1058 time_t now = CURRENT_SECONDS;
1061 struct ptlrpc_request *req;
1064 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1066 list_for_each(tmp, &set->set_requests) {
1067 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1069 /* request in-flight? */
1070 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) ||
1071 (req->rq_phase == RQ_PHASE_BULK)))
1074 if (req->rq_timedout) /* already timed out */
1077 deadline = req->rq_sent + req->rq_timeout;
1078 if (deadline <= now) /* actually expired already */
1079 timeout = 1; /* ASAP */
1080 else if (timeout == 0 || timeout > deadline - now)
1081 timeout = deadline - now;
1086 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1088 struct list_head *tmp;
1089 struct ptlrpc_request *req;
1090 struct l_wait_info lwi;
1094 if (list_empty(&set->set_requests))
1097 list_for_each(tmp, &set->set_requests) {
1098 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1099 if (req->rq_phase == RQ_PHASE_NEW)
1100 (void)ptlrpc_send_new_req(req);
1104 timeout = ptlrpc_set_next_timeout(set);
1106 /* wait until all complete, interrupted, or an in-flight
1108 CDEBUG(D_HA, "set %p going to sleep for %d seconds\n",
1110 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
1112 ptlrpc_interrupted_set, set);
1113 rc = l_wait_event(set->set_waitq, ptlrpc_check_set(set), &lwi);
1115 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1117 /* -EINTR => all requests have been flagged rq_intr so next
1119 * -ETIMEOUTD => someone timed out. When all reqs have
1120 * timed out, signals are enabled allowing completion with
1122 * I don't really care if we go once more round the loop in
1123 * the error cases -eeb. */
1124 } while (rc != 0 || set->set_remaining != 0);
1126 LASSERT(set->set_remaining == 0);
1129 list_for_each(tmp, &set->set_requests) {
1130 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1132 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1133 if (req->rq_status != 0)
1134 rc = req->rq_status;
1137 if (set->set_interpret != NULL) {
1138 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1140 rc = interpreter (set, set->set_arg, rc);
1146 static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
1148 struct ptlrpc_request_pool *pool = request->rq_pool;
1150 spin_lock(&pool->prp_lock);
1151 list_add_tail(&request->rq_list, &pool->prp_req_list);
1152 spin_unlock(&pool->prp_lock);
1155 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1158 if (request == NULL) {
1163 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1164 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1165 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1166 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1168 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1169 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1170 if (request->rq_import != NULL) {
1172 spin_lock(&request->rq_import->imp_lock);
1173 list_del_init(&request->rq_replay_list);
1175 spin_unlock(&request->rq_import->imp_lock);
1177 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1179 if (atomic_read(&request->rq_refcount) != 0) {
1180 DEBUG_REQ(D_ERROR, request,
1181 "freeing request with nonzero refcount");
1185 if (request->rq_repmsg != NULL) {
1186 OBD_FREE(request->rq_repmsg, request->rq_replen);
1187 request->rq_repmsg = NULL;
1189 if (request->rq_export != NULL) {
1190 class_export_put(request->rq_export);
1191 request->rq_export = NULL;
1193 if (request->rq_import != NULL) {
1194 class_import_put(request->rq_import);
1195 request->rq_import = NULL;
1197 if (request->rq_bulk != NULL)
1198 ptlrpc_free_bulk(request->rq_bulk);
1200 if (request->rq_pool) {
1201 __ptlrpc_free_req_to_pool(request);
1203 if (request->rq_reqmsg != NULL) {
1204 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
1205 request->rq_reqmsg = NULL;
1207 OBD_FREE(request, sizeof(*request));
1212 void ptlrpc_free_req(struct ptlrpc_request *request)
1214 __ptlrpc_free_req(request, 0);
1217 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1218 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1220 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1221 (void)__ptlrpc_req_finished(request, 1);
1224 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1227 if (request == NULL)
1230 if (request == LP_POISON ||
1231 request->rq_reqmsg == LP_POISON) {
1232 CERROR("dereferencing freed request (bug 575)\n");
1237 DEBUG_REQ(D_INFO, request, "refcount now %u",
1238 atomic_read(&request->rq_refcount) - 1);
1240 if (atomic_dec_and_test(&request->rq_refcount)) {
1241 __ptlrpc_free_req(request, locked);
1248 void ptlrpc_req_finished(struct ptlrpc_request *request)
1250 __ptlrpc_req_finished(request, 0);
1253 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1255 return request->rq_xid;
1257 EXPORT_SYMBOL(ptlrpc_req_xid);
1259 /* Disengage the client's reply buffer from the network
1260 * NB does _NOT_ unregister any client-side bulk.
1261 * IDEMPOTENT, but _not_ safe against concurrent callers.
1262 * The request owner (i.e. the thread doing the I/O) must call...
1264 void ptlrpc_unregister_reply (struct ptlrpc_request *request)
1268 struct l_wait_info lwi;
1270 LASSERT(!in_interrupt ()); /* might sleep */
1272 if (!ptlrpc_client_receiving_reply(request))
1275 LNetMDUnlink (request->rq_reply_md_h);
1277 /* We have to l_wait_event() whatever the result, to give liblustre
1278 * a chance to run reply_in_callback() */
1280 if (request->rq_set != NULL)
1281 wq = &request->rq_set->set_waitq;
1283 wq = &request->rq_reply_waitq;
1286 /* Network access will complete in finite time but the HUGE
1287 * timeout lets us CWARN for visibility of sluggish NALs */
1288 lwi = LWI_TIMEOUT(cfs_time_seconds(300), NULL, NULL);
1289 rc = l_wait_event (*wq, !ptlrpc_client_receiving_reply(request), &lwi);
1293 LASSERT (rc == -ETIMEDOUT);
1294 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout");
1298 /* caller must hold imp->imp_lock */
1299 void ptlrpc_free_committed(struct obd_import *imp)
1301 struct list_head *tmp, *saved;
1302 struct ptlrpc_request *req;
1303 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1306 LASSERT(imp != NULL);
1308 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1311 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1312 imp->imp_generation == imp->imp_last_generation_checked) {
1313 CDEBUG(D_HA, "%s: skip recheck for last_committed "LPU64"\n",
1314 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1318 CDEBUG(D_HA, "%s: committing for last_committed "LPU64" gen %d\n",
1319 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1320 imp->imp_generation);
1321 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1322 imp->imp_last_generation_checked = imp->imp_generation;
1324 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1325 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1327 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1328 LASSERT(req != last_req);
1331 if (req->rq_import_generation < imp->imp_generation) {
1332 DEBUG_REQ(D_HA, req, "freeing request with old gen");
1336 if (req->rq_replay) {
1337 DEBUG_REQ(D_HA, req, "keeping (FL_REPLAY)");
1341 /* not yet committed */
1342 if (req->rq_transno > imp->imp_peer_committed_transno) {
1343 DEBUG_REQ(D_HA, req, "stopping search");
1347 DEBUG_REQ(D_HA, req, "committing (last_committed "LPU64")",
1348 imp->imp_peer_committed_transno);
1350 if (req->rq_commit_cb != NULL)
1351 req->rq_commit_cb(req);
1352 list_del_init(&req->rq_replay_list);
1353 __ptlrpc_req_finished(req, 1);
1360 void ptlrpc_cleanup_client(struct obd_import *imp)
1367 void ptlrpc_resend_req(struct ptlrpc_request *req)
1369 DEBUG_REQ(D_HA, req, "going to resend");
1370 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
1371 req->rq_status = -EAGAIN;
1373 spin_lock(&req->rq_lock);
1375 req->rq_net_err = 0;
1376 req->rq_timedout = 0;
1378 __u64 old_xid = req->rq_xid;
1380 /* ensure previous bulk fails */
1381 req->rq_xid = ptlrpc_next_xid();
1382 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1383 old_xid, req->rq_xid);
1385 ptlrpc_wake_client_req(req);
1386 spin_unlock(&req->rq_lock);
1389 /* XXX: this function and rq_status are currently unused */
1390 void ptlrpc_restart_req(struct ptlrpc_request *req)
1392 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1393 req->rq_status = -ERESTARTSYS;
1395 spin_lock(&req->rq_lock);
1396 req->rq_restart = 1;
1397 req->rq_timedout = 0;
1398 ptlrpc_wake_client_req(req);
1399 spin_unlock(&req->rq_lock);
1402 static int expired_request(void *data)
1404 struct ptlrpc_request *req = data;
1407 RETURN(ptlrpc_expire_one_request(req));
1410 static void interrupted_request(void *data)
1412 struct ptlrpc_request *req = data;
1413 DEBUG_REQ(D_HA, req, "request interrupted");
1414 spin_lock(&req->rq_lock);
1416 spin_unlock(&req->rq_lock);
1419 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
1422 atomic_inc(&req->rq_refcount);
1426 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
1427 struct obd_import *imp)
1429 struct list_head *tmp;
1431 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1433 /* clear this for new requests that were resent as well
1434 as resent replayed requests. */
1435 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1437 /* don't re-add requests that have been replayed */
1438 if (!list_empty(&req->rq_replay_list))
1441 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
1443 LASSERT(imp->imp_replayable);
1444 /* Balanced in ptlrpc_free_committed, usually. */
1445 ptlrpc_request_addref(req);
1446 list_for_each_prev(tmp, &imp->imp_replay_list) {
1447 struct ptlrpc_request *iter =
1448 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1450 /* We may have duplicate transnos if we create and then
1451 * open a file, or for closes retained if to match creating
1452 * opens, so use req->rq_xid as a secondary key.
1453 * (See bugs 684, 685, and 428.)
1454 * XXX no longer needed, but all opens need transnos!
1456 if (iter->rq_transno > req->rq_transno)
1459 if (iter->rq_transno == req->rq_transno) {
1460 LASSERT(iter->rq_xid != req->rq_xid);
1461 if (iter->rq_xid > req->rq_xid)
1465 list_add(&req->rq_replay_list, &iter->rq_replay_list);
1469 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
1472 int ptlrpc_queue_wait(struct ptlrpc_request *req)
1476 struct l_wait_info lwi;
1477 struct obd_import *imp = req->rq_import;
1478 cfs_duration_t timeout = 0;
1481 LASSERT(req->rq_set == NULL);
1482 LASSERT(!req->rq_receiving_reply);
1483 atomic_inc(&imp->imp_inflight);
1485 /* for distributed debugging */
1486 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1487 LASSERT(imp->imp_obd != NULL);
1488 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
1489 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1490 imp->imp_obd->obd_uuid.uuid,
1491 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1492 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1493 lustre_msg_get_opc(req->rq_reqmsg));
1495 /* Mark phase here for a little debug help */
1496 req->rq_phase = RQ_PHASE_RPC;
1498 spin_lock(&imp->imp_lock);
1499 req->rq_import_generation = imp->imp_generation;
1501 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1502 list_del(&req->rq_list);
1504 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1505 spin_unlock(&imp->imp_lock);
1507 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
1509 ptlrpc_import_state_name(req->rq_send_state),
1510 ptlrpc_import_state_name(imp->imp_state));
1511 lwi = LWI_INTR(interrupted_request, req);
1512 rc = l_wait_event(req->rq_reply_waitq,
1513 (req->rq_send_state == imp->imp_state ||
1514 req->rq_err || req->rq_intr),
1516 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
1518 ptlrpc_import_state_name(imp->imp_state),
1519 ptlrpc_import_state_name(req->rq_send_state),
1520 req->rq_err, req->rq_intr);
1522 spin_lock(&imp->imp_lock);
1523 list_del_init(&req->rq_list);
1528 else if (req->rq_intr) {
1531 else if (req->rq_no_resend) {
1532 spin_unlock(&imp->imp_lock);
1533 GOTO(out, rc = -ETIMEDOUT);
1541 list_del_init(&req->rq_list);
1542 spin_unlock(&imp->imp_lock);
1543 req->rq_status = rc; // XXX this ok?
1547 if (req->rq_resend) {
1548 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
1550 if (req->rq_bulk != NULL) {
1551 ptlrpc_unregister_bulk (req);
1553 /* bulk requests are supposed to be
1554 * idempotent, so we are free to bump the xid
1555 * here, which we need to do before
1556 * registering the bulk again (bug 6371).
1557 * print the old xid first for sanity.
1559 DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
1560 req->rq_xid = ptlrpc_next_xid();
1563 DEBUG_REQ(D_HA, req, "resending: ");
1566 /* XXX this is the same as ptlrpc_set_wait */
1567 LASSERT(list_empty(&req->rq_list));
1568 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1569 spin_unlock(&imp->imp_lock);
1571 rc = ptl_send_rpc(req, 0);
1573 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
1576 timeout = cfs_timeout_cap(cfs_time_seconds(req->rq_timeout));
1577 DEBUG_REQ(D_NET, req,
1578 "-- sleeping for "CFS_DURATION_T" jiffies", timeout);
1580 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
1582 l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
1584 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
1585 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1586 imp->imp_obd->obd_uuid.uuid,
1587 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1588 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1589 lustre_msg_get_opc(req->rq_reqmsg));
1591 spin_lock(&imp->imp_lock);
1592 list_del_init(&req->rq_list);
1593 spin_unlock(&imp->imp_lock);
1595 /* If the reply was received normally, this just grabs the spinlock
1596 * (ensuring the reply callback has returned), sees that
1597 * req->rq_receiving_reply is clear and returns. */
1598 ptlrpc_unregister_reply (req);
1601 GOTO(out, rc = -EIO);
1603 /* Resend if we need to, unless we were interrupted. */
1604 if (req->rq_resend && !req->rq_intr) {
1605 /* ...unless we were specifically told otherwise. */
1606 if (req->rq_no_resend)
1607 GOTO(out, rc = -ETIMEDOUT);
1608 spin_lock(&imp->imp_lock);
1613 /* Should only be interrupted if we timed out. */
1614 if (!req->rq_timedout)
1615 DEBUG_REQ(D_ERROR, req,
1616 "rq_intr set but rq_timedout not");
1617 GOTO(out, rc = -EINTR);
1620 if (req->rq_timedout) { /* non-recoverable timeout */
1621 GOTO(out, rc = -ETIMEDOUT);
1624 if (!req->rq_replied) {
1625 /* How can this be? -eeb */
1626 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
1628 GOTO(out, rc = req->rq_status);
1631 rc = after_reply(req);
1632 /* NB may return +ve success rc */
1633 if (req->rq_resend) {
1634 spin_lock(&imp->imp_lock);
1639 if (req->rq_bulk != NULL) {
1641 /* success so far. Note that anything going wrong
1642 * with bulk now, is EXTREMELY strange, since the
1643 * server must have believed that the bulk
1644 * tranferred OK before she replied with success to
1646 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
1647 brc = l_wait_event(req->rq_reply_waitq,
1648 !ptlrpc_bulk_active(req->rq_bulk),
1650 LASSERT(brc == 0 || brc == -ETIMEDOUT);
1652 LASSERT(brc == -ETIMEDOUT);
1653 DEBUG_REQ(D_ERROR, req, "bulk timed out");
1655 } else if (!req->rq_bulk->bd_success) {
1656 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1661 ptlrpc_unregister_bulk (req);
1664 LASSERT(!req->rq_receiving_reply);
1665 req->rq_phase = RQ_PHASE_INTERPRET;
1667 atomic_dec(&imp->imp_inflight);
1668 cfs_waitq_signal(&imp->imp_recovery_waitq);
1672 struct ptlrpc_replay_async_args {
1674 int praa_old_status;
1677 static int ptlrpc_replay_interpret(struct ptlrpc_request *req,
1678 void * data, int rc)
1680 struct ptlrpc_replay_async_args *aa = data;
1681 struct obd_import *imp = req->rq_import;
1684 atomic_dec(&imp->imp_replay_inflight);
1686 if (!req->rq_replied) {
1687 CERROR("request replay timed out, restarting recovery\n");
1688 GOTO(out, rc = -ETIMEDOUT);
1691 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
1692 lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN)
1693 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
1695 /* The transno had better not change over replay. */
1696 LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
1697 lustre_msg_get_transno(req->rq_repmsg));
1699 DEBUG_REQ(D_HA, req, "got rep");
1701 /* let the callback do fixups, possibly including in the request */
1702 if (req->rq_replay_cb)
1703 req->rq_replay_cb(req);
1705 if (req->rq_replied &&
1706 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
1707 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
1708 lustre_msg_get_status(req->rq_repmsg),
1709 aa->praa_old_status);
1711 /* Put it back for re-replay. */
1712 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
1715 spin_lock(&imp->imp_lock);
1716 imp->imp_last_replay_transno = req->rq_transno;
1717 spin_unlock(&imp->imp_lock);
1719 /* continue with recovery */
1720 rc = ptlrpc_import_recovery_state_machine(imp);
1722 req->rq_send_state = aa->praa_old_state;
1725 /* this replay failed, so restart recovery */
1726 ptlrpc_connect_import(imp, NULL);
1732 int ptlrpc_replay_req(struct ptlrpc_request *req)
1734 struct ptlrpc_replay_async_args *aa;
1737 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
1739 /* Not handling automatic bulk replay yet (or ever?) */
1740 LASSERT(req->rq_bulk == NULL);
1742 DEBUG_REQ(D_HA, req, "REPLAY");
1744 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
1745 aa = (struct ptlrpc_replay_async_args *)&req->rq_async_args;
1746 memset(aa, 0, sizeof *aa);
1748 /* Prepare request to be resent with ptlrpcd */
1749 aa->praa_old_state = req->rq_send_state;
1750 req->rq_send_state = LUSTRE_IMP_REPLAY;
1751 req->rq_phase = RQ_PHASE_NEW;
1752 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
1755 req->rq_interpret_reply = ptlrpc_replay_interpret;
1756 atomic_inc(&req->rq_import->imp_replay_inflight);
1757 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
1759 ptlrpcd_add_req(req);
1763 void ptlrpc_abort_inflight(struct obd_import *imp)
1765 struct list_head *tmp, *n;
1768 /* Make sure that no new requests get processed for this import.
1769 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
1770 * this flag and then putting requests on sending_list or delayed_list.
1772 spin_lock(&imp->imp_lock);
1774 /* XXX locking? Maybe we should remove each request with the list
1775 * locked? Also, how do we know if the requests on the list are
1776 * being freed at this time?
1778 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
1779 struct ptlrpc_request *req =
1780 list_entry(tmp, struct ptlrpc_request, rq_list);
1782 DEBUG_REQ(D_HA, req, "inflight");
1784 spin_lock (&req->rq_lock);
1785 if (req->rq_import_generation < imp->imp_generation) {
1787 ptlrpc_wake_client_req(req);
1789 spin_unlock (&req->rq_lock);
1792 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
1793 struct ptlrpc_request *req =
1794 list_entry(tmp, struct ptlrpc_request, rq_list);
1796 DEBUG_REQ(D_HA, req, "aborting waiting req");
1798 spin_lock (&req->rq_lock);
1799 if (req->rq_import_generation < imp->imp_generation) {
1801 ptlrpc_wake_client_req(req);
1803 spin_unlock (&req->rq_lock);
1806 /* Last chance to free reqs left on the replay list, but we
1807 * will still leak reqs that haven't committed. */
1808 if (imp->imp_replayable)
1809 ptlrpc_free_committed(imp);
1811 spin_unlock(&imp->imp_lock);
1816 static __u64 ptlrpc_last_xid = 0;
1817 spinlock_t ptlrpc_last_xid_lock;
1819 __u64 ptlrpc_next_xid(void)
1822 spin_lock(&ptlrpc_last_xid_lock);
1823 tmp = ++ptlrpc_last_xid;
1824 spin_unlock(&ptlrpc_last_xid_lock);
1828 __u64 ptlrpc_sample_next_xid(void)
1831 spin_lock(&ptlrpc_last_xid_lock);
1832 tmp = ptlrpc_last_xid + 1;
1833 spin_unlock(&ptlrpc_last_xid_lock);
1836 EXPORT_SYMBOL(ptlrpc_sample_next_xid);