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 Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #define DEBUG_SUBSYSTEM S_RPC
27 #include <liblustre.h>
30 #include <linux/obd_support.h>
31 #include <linux/obd_class.h>
32 #include <linux/lustre_lib.h>
33 #include <linux/lustre_ha.h>
34 #include <linux/lustre_import.h>
36 #include "ptlrpc_internal.h"
38 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
39 struct ptlrpc_client *cl)
41 cl->cli_request_portal = req_portal;
42 cl->cli_reply_portal = rep_portal;
46 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid)
48 struct ptlrpc_connection *c;
49 struct ptlrpc_peer peer;
52 err = ptlrpc_uuid_to_peer(uuid, &peer);
54 CERROR("cannot find peer %s!\n", uuid->uuid);
58 c = ptlrpc_get_connection(&peer, uuid);
60 memcpy(c->c_remote_uuid.uuid,
61 uuid->uuid, sizeof(c->c_remote_uuid.uuid));
64 CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c);
69 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,
70 struct obd_uuid *uuid)
72 struct ptlrpc_peer peer;
75 err = ptlrpc_uuid_to_peer(uuid, &peer);
77 CERROR("cannot find peer %s!\n", uuid->uuid);
81 memcpy(&conn->c_peer, &peer, sizeof (peer));
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 init_waitqueue_head(&desc->bd_waitq);
95 desc->bd_max_pages = npages;
96 desc->bd_page_count = 0;
97 desc->bd_md_h = PTL_HANDLE_NONE;
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;
110 LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
111 desc = new_bulk(npages, type, portal);
115 desc->bd_import_generation = req->rq_import_generation;
116 desc->bd_import = class_import_get(imp);
119 desc->bd_cbid.cbid_fn = client_bulk_callback;
120 desc->bd_cbid.cbid_arg = desc;
122 /* This makes req own desc, and free it when she frees herself */
128 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp (struct ptlrpc_request *req,
129 int npages, int type, int portal)
131 struct obd_export *exp = req->rq_export;
132 struct ptlrpc_bulk_desc *desc;
134 LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK);
136 desc = new_bulk(npages, type, portal);
140 desc->bd_export = class_export_get(exp);
143 desc->bd_cbid.cbid_fn = server_bulk_callback;
144 desc->bd_cbid.cbid_arg = desc;
146 /* NB we don't assign rq_bulk here; server-side requests are
147 * re-used, and the handler frees the bulk desc explicitly. */
152 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
153 struct page *page, int pageoffset, int len)
156 ptl_kiov_t *kiov = &desc->bd_iov[desc->bd_page_count];
158 struct iovec *iov = &desc->bd_iov[desc->bd_page_count];
160 LASSERT(desc->bd_page_count < desc->bd_max_pages);
161 LASSERT(page != NULL);
162 LASSERT(pageoffset >= 0);
164 LASSERT(pageoffset + len <= PAGE_SIZE);
167 kiov->kiov_page = page;
168 kiov->kiov_offset = pageoffset;
169 kiov->kiov_len = len;
171 iov->iov_base = page->addr + pageoffset;
174 desc->bd_page_count++;
178 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
182 LASSERT(desc != NULL);
183 LASSERT(desc->bd_page_count != 0x5a5a5a5a); /* not freed already */
184 LASSERT(!desc->bd_network_rw); /* network hands off or */
185 LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
187 class_export_put(desc->bd_export);
189 class_import_put(desc->bd_import);
191 OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc,
192 bd_iov[desc->bd_max_pages]));
196 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
197 int count, int *lengths, char **bufs)
199 struct ptlrpc_request *request;
203 LASSERT((unsigned long)imp > 0x1000);
205 OBD_ALLOC(request, sizeof(*request));
207 CERROR("request allocation out of memory\n");
211 rc = lustre_pack_request(request, count, lengths, bufs);
213 CERROR("cannot pack request %d\n", rc);
214 OBD_FREE(request, sizeof(*request));
218 if (imp->imp_server_timeout)
219 request->rq_timeout = obd_timeout / 2;
221 request->rq_timeout = obd_timeout;
222 request->rq_send_state = LUSTRE_IMP_FULL;
223 request->rq_type = PTL_RPC_MSG_REQUEST;
224 request->rq_import = class_import_get(imp);
226 request->rq_req_cbid.cbid_fn = request_out_callback;
227 request->rq_req_cbid.cbid_arg = request;
229 request->rq_reply_cbid.cbid_fn = reply_in_callback;
230 request->rq_reply_cbid.cbid_arg = request;
232 request->rq_phase = RQ_PHASE_NEW;
234 /* XXX FIXME bug 249 */
235 request->rq_request_portal = imp->imp_client->cli_request_portal;
236 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
238 spin_lock_init(&request->rq_lock);
239 INIT_LIST_HEAD(&request->rq_list);
240 INIT_LIST_HEAD(&request->rq_replay_list);
241 init_waitqueue_head(&request->rq_reply_waitq);
242 request->rq_xid = ptlrpc_next_xid();
243 atomic_set(&request->rq_refcount, 1);
245 request->rq_reqmsg->opc = opcode;
246 request->rq_reqmsg->flags = 0;
251 struct ptlrpc_request_set *ptlrpc_prep_set(void)
253 struct ptlrpc_request_set *set;
255 OBD_ALLOC(set, sizeof *set);
258 INIT_LIST_HEAD(&set->set_requests);
259 init_waitqueue_head(&set->set_waitq);
260 set->set_remaining = 0;
261 spin_lock_init(&set->set_new_req_lock);
262 INIT_LIST_HEAD(&set->set_new_requests);
267 /* Finish with this set; opposite of prep_set. */
268 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
270 struct list_head *tmp;
271 struct list_head *next;
276 /* Requests on the set should either all be completed, or all be new */
277 expected_phase = (set->set_remaining == 0) ?
278 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
279 list_for_each (tmp, &set->set_requests) {
280 struct ptlrpc_request *req =
281 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
283 LASSERT(req->rq_phase == expected_phase);
287 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
289 list_for_each_safe(tmp, next, &set->set_requests) {
290 struct ptlrpc_request *req =
291 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
292 list_del_init(&req->rq_set_chain);
294 LASSERT(req->rq_phase == expected_phase);
296 if (req->rq_phase == RQ_PHASE_NEW) {
298 if (req->rq_interpret_reply != NULL) {
299 int (*interpreter)(struct ptlrpc_request *,
301 req->rq_interpret_reply;
303 /* higher level (i.e. LOV) failed;
304 * let the sub reqs clean up */
305 req->rq_status = -EBADR;
306 interpreter(req, &req->rq_async_args,
309 set->set_remaining--;
313 ptlrpc_req_finished (req);
316 LASSERT(set->set_remaining == 0);
318 OBD_FREE(set, sizeof(*set));
322 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
323 struct ptlrpc_request *req)
325 /* The set takes over the caller's request reference */
326 list_add_tail(&req->rq_set_chain, &set->set_requests);
328 set->set_remaining++;
331 /* lock so many callers can add things, the context that owns the set
332 * is supposed to notice these and move them into the set proper. */
333 void ptlrpc_set_add_new_req(struct ptlrpc_request_set *set,
334 struct ptlrpc_request *req)
337 spin_lock_irqsave(&set->set_new_req_lock, flags);
338 /* The set takes over the caller's request reference */
339 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
341 spin_unlock_irqrestore(&set->set_new_req_lock, flags);
345 * Based on the current state of the import, determine if the request
346 * can be sent, is an error, or should be delayed.
348 * Returns true if this request should be delayed. If false, and
349 * *status is set, then the request can not be sent and *status is the
350 * error code. If false and status is 0, then request can be sent.
352 * The imp->imp_lock must be held.
354 static int ptlrpc_import_delay_req(struct obd_import *imp,
355 struct ptlrpc_request *req, int *status)
360 LASSERT (status != NULL);
363 if (imp->imp_state == LUSTRE_IMP_NEW) {
364 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
368 else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
369 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
373 * If the import has been invalidated (such as by an OST failure), the
374 * request must fail with -EIO.
376 else if (imp->imp_invalid) {
377 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
380 else if (req->rq_import_generation != imp->imp_generation) {
381 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
384 else if (req->rq_send_state != imp->imp_state) {
385 if (imp->imp_obd->obd_no_recov || imp->imp_dlm_fake)
386 *status = -EWOULDBLOCK;
394 static int ptlrpc_check_reply(struct ptlrpc_request *req)
400 /* serialise with network callback */
401 spin_lock_irqsave (&req->rq_lock, flags);
403 if (req->rq_replied) {
404 DEBUG_REQ(D_NET, req, "REPLIED:");
409 DEBUG_REQ(D_ERROR, req, "ABORTED:");
413 if (req->rq_resend) {
414 DEBUG_REQ(D_ERROR, req, "RESEND:");
418 if (req->rq_restart) {
419 DEBUG_REQ(D_ERROR, req, "RESTART:");
424 spin_unlock_irqrestore (&req->rq_lock, flags);
425 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
429 static int ptlrpc_check_status(struct ptlrpc_request *req)
434 err = req->rq_repmsg->status;
435 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
436 DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err == %d",
438 RETURN(err < 0 ? err : -EINVAL);
442 DEBUG_REQ(D_INFO, req, "status is %d", err);
443 } else if (err > 0) {
444 /* XXX: translate this error from net to host */
445 DEBUG_REQ(D_INFO, req, "status is %d", err);
451 static int after_reply(struct ptlrpc_request *req)
454 struct obd_import *imp = req->rq_import;
458 LASSERT(!req->rq_receiving_reply);
460 /* NB Until this point, the whole of the incoming message,
461 * including buflens, status etc is in the sender's byte order. */
464 /* Clear reply swab mask; this is a new reply in sender's byte order */
465 req->rq_rep_swab_mask = 0;
467 LASSERT (req->rq_nob_received <= req->rq_replen);
468 rc = lustre_unpack_msg(req->rq_repmsg, req->rq_nob_received);
470 CERROR("unpack_rep failed: %d\n", rc);
474 if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY &&
475 req->rq_repmsg->type != PTL_RPC_MSG_ERR) {
476 CERROR("invalid packet type received (type=%u)\n",
477 req->rq_repmsg->type);
481 /* Store transno in reqmsg for replay. */
482 req->rq_reqmsg->transno = req->rq_transno = req->rq_repmsg->transno;
484 rc = ptlrpc_check_status(req);
486 /* Either we've been evicted, or the server has failed for
487 * some reason. Try to reconnect, and if that fails, punt to the
489 if (rc == -ENOTCONN) {
490 if (req->rq_send_state != LUSTRE_IMP_FULL ||
491 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
495 ptlrpc_request_handle_notconn(req);
500 if (req->rq_import->imp_replayable) {
501 spin_lock_irqsave(&imp->imp_lock, flags);
502 if (req->rq_replay || req->rq_transno != 0)
503 ptlrpc_retain_replayable_request(req, imp);
504 else if (req->rq_commit_cb != NULL)
505 req->rq_commit_cb(req);
507 if (req->rq_transno > imp->imp_max_transno)
508 imp->imp_max_transno = req->rq_transno;
510 /* Replay-enabled imports return commit-status information. */
511 if (req->rq_repmsg->last_committed)
512 imp->imp_peer_committed_transno =
513 req->rq_repmsg->last_committed;
514 ptlrpc_free_committed(imp);
515 spin_unlock_irqrestore(&imp->imp_lock, flags);
521 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
523 struct obd_import *imp;
528 LASSERT(req->rq_phase == RQ_PHASE_NEW);
529 req->rq_phase = RQ_PHASE_RPC;
531 imp = req->rq_import;
532 spin_lock_irqsave(&imp->imp_lock, flags);
534 if (imp->imp_invalid) {
535 spin_unlock_irqrestore(&imp->imp_lock, flags);
536 req->rq_status = -EIO;
537 req->rq_phase = RQ_PHASE_INTERPRET;
541 req->rq_import_generation = imp->imp_generation;
543 if (ptlrpc_import_delay_req(imp, req, &rc)) {
544 spin_lock (&req->rq_lock);
546 spin_unlock (&req->rq_lock);
548 LASSERT(list_empty (&req->rq_list));
550 // list_del(&req->rq_list);
551 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
552 spin_unlock_irqrestore(&imp->imp_lock, flags);
557 spin_unlock_irqrestore(&imp->imp_lock, flags);
559 req->rq_phase = RQ_PHASE_INTERPRET;
563 /* XXX this is the same as ptlrpc_queue_wait */
564 LASSERT(list_empty(&req->rq_list));
565 list_add_tail(&req->rq_list, &imp->imp_sending_list);
566 spin_unlock_irqrestore(&imp->imp_lock, flags);
568 req->rq_reqmsg->status = current->pid;
569 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:ni:nid:opc"
570 " %s:%s:%d:"LPU64":%s:"LPX64":%d\n", current->comm,
571 imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status,
573 imp->imp_connection->c_peer.peer_ni->pni_name,
574 imp->imp_connection->c_peer.peer_nid,
575 req->rq_reqmsg->opc);
577 rc = ptl_send_rpc(req);
579 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
586 int ptlrpc_check_set(struct ptlrpc_request_set *set)
589 struct list_head *tmp;
590 int force_timer_recalc = 0;
593 if (set->set_remaining == 0)
596 list_for_each(tmp, &set->set_requests) {
597 struct ptlrpc_request *req =
598 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
599 struct obd_import *imp = req->rq_import;
602 if (req->rq_phase == RQ_PHASE_NEW &&
603 ptlrpc_send_new_req(req)) {
604 force_timer_recalc = 1;
607 if (!(req->rq_phase == RQ_PHASE_RPC ||
608 req->rq_phase == RQ_PHASE_BULK ||
609 req->rq_phase == RQ_PHASE_INTERPRET ||
610 req->rq_phase == RQ_PHASE_COMPLETE)) {
611 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
615 if (req->rq_phase == RQ_PHASE_COMPLETE)
618 if (req->rq_phase == RQ_PHASE_INTERPRET)
619 GOTO(interpret, req->rq_status);
622 ptlrpc_unregister_reply(req);
623 if (req->rq_status == 0)
624 req->rq_status = -EIO;
625 req->rq_phase = RQ_PHASE_INTERPRET;
627 spin_lock_irqsave(&imp->imp_lock, flags);
628 list_del_init(&req->rq_list);
629 spin_unlock_irqrestore(&imp->imp_lock, flags);
631 GOTO(interpret, req->rq_status);
634 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
635 * will only be set after rq_timedout, but the osic waiting
636 * path sets rq_intr irrespective of whether ptlrpcd has
637 * seen a timeout. our policy is to only interpret
638 * interrupted rpcs after they have timed out */
639 if (req->rq_intr && (req->rq_timedout || req->rq_waiting)) {
640 /* NB could be on delayed list */
641 ptlrpc_unregister_reply(req);
642 req->rq_status = -EINTR;
643 req->rq_phase = RQ_PHASE_INTERPRET;
645 spin_lock_irqsave(&imp->imp_lock, flags);
646 list_del_init(&req->rq_list);
647 spin_unlock_irqrestore(&imp->imp_lock, flags);
649 GOTO(interpret, req->rq_status);
652 if (req->rq_phase == RQ_PHASE_RPC) {
653 if (req->rq_waiting || req->rq_resend) {
656 LASSERT (!ptlrpc_client_receiving_reply(req));
657 LASSERT (req->rq_bulk == NULL ||
658 !ptlrpc_bulk_active(req->rq_bulk));
660 spin_lock_irqsave(&imp->imp_lock, flags);
662 if (ptlrpc_import_delay_req(imp, req, &status)) {
663 spin_unlock_irqrestore(&imp->imp_lock,
668 list_del(&req->rq_list);
669 list_add_tail(&req->rq_list,
670 &imp->imp_sending_list);
673 req->rq_status = status;
674 req->rq_phase = RQ_PHASE_INTERPRET;
675 spin_unlock_irqrestore(&imp->imp_lock,
677 GOTO(interpret, req->rq_status);
679 spin_unlock_irqrestore(&imp->imp_lock, flags);
682 if (req->rq_resend) {
683 lustre_msg_add_flags(req->rq_reqmsg,
685 ptlrpc_unregister_reply(req);
687 __u64 old_xid = req->rq_xid;
689 /* ensure previous bulk fails */
690 req->rq_xid = ptlrpc_next_xid();
691 CDEBUG(D_HA, "resend bulk "
694 old_xid, req->rq_xid);
698 rc = ptl_send_rpc(req);
700 DEBUG_REQ(D_HA, req, "send failed (%d)",
702 force_timer_recalc = 1;
705 /* need to reset the timeout */
706 force_timer_recalc = 1;
709 /* Still waiting for a reply? */
710 if (ptlrpc_client_receiving_reply(req))
713 /* Did we actually receive a reply? */
714 if (!ptlrpc_client_replied(req))
717 spin_lock_irqsave(&imp->imp_lock, flags);
718 list_del_init(&req->rq_list);
719 spin_unlock_irqrestore(&imp->imp_lock, flags);
721 req->rq_status = after_reply(req);
722 if (req->rq_resend) {
723 /* Add this req to the delayed list so
724 it can be errored if the import is
725 evicted after recovery. */
726 spin_lock_irqsave (&req->rq_lock, flags);
727 list_add_tail(&req->rq_list,
728 &imp->imp_delayed_list);
729 spin_unlock_irqrestore(&req->rq_lock, flags);
733 /* If there is no bulk associated with this request,
734 * then we're done and should let the interpreter
735 * process the reply. Similarly if the RPC returned
736 * an error, and therefore the bulk will never arrive.
738 if (req->rq_bulk == NULL || req->rq_status != 0) {
739 req->rq_phase = RQ_PHASE_INTERPRET;
740 GOTO(interpret, req->rq_status);
743 req->rq_phase = RQ_PHASE_BULK;
746 LASSERT(req->rq_phase == RQ_PHASE_BULK);
747 if (ptlrpc_bulk_active(req->rq_bulk))
750 if (!req->rq_bulk->bd_success) {
751 /* The RPC reply arrived OK, but the bulk screwed
752 * up! Dead wierd since the server told us the RPC
753 * was good after getting the REPLY for her GET or
754 * the ACK for her PUT. */
755 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
759 req->rq_phase = RQ_PHASE_INTERPRET;
762 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
763 LASSERT(!req->rq_receiving_reply);
765 ptlrpc_unregister_reply(req);
766 if (req->rq_bulk != NULL)
767 ptlrpc_unregister_bulk (req);
769 req->rq_phase = RQ_PHASE_COMPLETE;
771 if (req->rq_interpret_reply != NULL) {
772 int (*interpreter)(struct ptlrpc_request *,void *,int) =
773 req->rq_interpret_reply;
774 req->rq_status = interpreter(req, &req->rq_async_args,
778 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:ni:nid:"
779 "opc %s:%s:%d:"LPU64":%s:"LPX64":%d\n", current->comm,
780 imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status,
782 imp->imp_connection->c_peer.peer_ni->pni_name,
783 imp->imp_connection->c_peer.peer_nid,
784 req->rq_reqmsg->opc);
786 set->set_remaining--;
789 /* If we hit an error, we want to recover promptly. */
790 RETURN(set->set_remaining == 0 || force_timer_recalc);
793 int ptlrpc_expire_one_request(struct ptlrpc_request *req)
796 struct obd_import *imp = req->rq_import;
799 DEBUG_REQ(D_ERROR, req, "timeout");
801 spin_lock_irqsave (&req->rq_lock, flags);
802 req->rq_timedout = 1;
803 spin_unlock_irqrestore (&req->rq_lock, flags);
805 ptlrpc_unregister_reply (req);
807 if (req->rq_bulk != NULL)
808 ptlrpc_unregister_bulk (req);
811 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
815 /* The DLM server doesn't want recovery run on its imports. */
816 if (imp->imp_dlm_fake)
819 /* If this request is for recovery or other primordial tasks,
820 * then error it out here. */
821 if (req->rq_send_state != LUSTRE_IMP_FULL ||
822 imp->imp_obd->obd_no_recov) {
823 spin_lock_irqsave (&req->rq_lock, flags);
824 req->rq_status = -ETIMEDOUT;
826 spin_unlock_irqrestore (&req->rq_lock, flags);
830 ptlrpc_fail_import(imp, req->rq_import_generation);
835 int ptlrpc_expired_set(void *data)
837 struct ptlrpc_request_set *set = data;
838 struct list_head *tmp;
839 time_t now = LTIME_S (CURRENT_TIME);
842 LASSERT(set != NULL);
844 /* A timeout expired; see which reqs it applies to... */
845 list_for_each (tmp, &set->set_requests) {
846 struct ptlrpc_request *req =
847 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
849 /* request in-flight? */
850 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting
851 && !req->rq_resend) ||
852 (req->rq_phase == RQ_PHASE_BULK)))
855 if (req->rq_timedout || /* already dealt with */
856 req->rq_sent + req->rq_timeout > now) /* not expired */
859 /* deal with this guy */
860 ptlrpc_expire_one_request (req);
863 /* When waiting for a whole set, we always to break out of the
864 * sleep so we can recalculate the timeout, or enable interrupts
865 * iff everyone's timed out.
870 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
873 spin_lock_irqsave(&req->rq_lock, flags);
875 spin_unlock_irqrestore(&req->rq_lock, flags);
878 void ptlrpc_interrupted_set(void *data)
880 struct ptlrpc_request_set *set = data;
881 struct list_head *tmp;
883 LASSERT(set != NULL);
884 CERROR("INTERRUPTED SET %p\n", set);
886 list_for_each(tmp, &set->set_requests) {
887 struct ptlrpc_request *req =
888 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
890 if (req->rq_phase != RQ_PHASE_RPC)
893 ptlrpc_mark_interrupted(req);
897 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
899 struct list_head *tmp;
900 time_t now = LTIME_S(CURRENT_TIME);
903 struct ptlrpc_request *req;
906 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
908 list_for_each(tmp, &set->set_requests) {
909 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
911 /* request in-flight? */
912 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) ||
913 (req->rq_phase == RQ_PHASE_BULK)))
916 if (req->rq_timedout) /* already timed out */
919 deadline = req->rq_sent + req->rq_timeout;
920 if (deadline <= now) /* actually expired already */
921 timeout = 1; /* ASAP */
922 else if (timeout == 0 || timeout > deadline - now)
923 timeout = deadline - now;
929 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
931 struct list_head *tmp;
932 struct ptlrpc_request *req;
933 struct l_wait_info lwi;
937 LASSERT(!list_empty(&set->set_requests));
938 list_for_each(tmp, &set->set_requests) {
939 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
940 if (req->rq_phase == RQ_PHASE_NEW)
941 (void)ptlrpc_send_new_req(req);
945 timeout = ptlrpc_set_next_timeout(set);
947 /* wait until all complete, interrupted, or an in-flight
949 CDEBUG(D_HA, "set %p going to sleep for %d seconds\n",
951 lwi = LWI_TIMEOUT_INTR((timeout ? timeout : 1) * HZ,
953 ptlrpc_interrupted_set, set);
954 rc = l_wait_event(set->set_waitq, ptlrpc_check_set(set), &lwi);
956 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
958 /* -EINTR => all requests have been flagged rq_intr so next
960 * -ETIMEOUTD => someone timed out. When all reqs have
961 * timed out, signals are enabled allowing completion with
963 * I don't really care if we go once more round the loop in
964 * the error cases -eeb. */
967 LASSERT(set->set_remaining == 0);
970 list_for_each(tmp, &set->set_requests) {
971 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
973 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
974 if (req->rq_status != 0)
978 if (set->set_interpret != NULL) {
979 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
981 rc = interpreter (set, &set->set_args, rc);
987 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
990 if (request == NULL) {
995 LASSERT(!request->rq_receiving_reply);
996 LASSERT(request->rq_rqbd == NULL); /* client-side */
998 /* We must take it off the imp_replay_list first. Otherwise, we'll set
999 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1000 if (request->rq_import != NULL) {
1001 unsigned long flags = 0;
1003 spin_lock_irqsave(&request->rq_import->imp_lock, flags);
1004 list_del_init(&request->rq_replay_list);
1006 spin_unlock_irqrestore(&request->rq_import->imp_lock,
1010 if (atomic_read(&request->rq_refcount) != 0) {
1011 DEBUG_REQ(D_ERROR, request,
1012 "freeing request with nonzero refcount");
1016 if (request->rq_repmsg != NULL) {
1017 OBD_FREE(request->rq_repmsg, request->rq_replen);
1018 request->rq_repmsg = NULL;
1020 if (request->rq_reqmsg != NULL) {
1021 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
1022 request->rq_reqmsg = NULL;
1024 if (request->rq_export != NULL) {
1025 class_export_put(request->rq_export);
1026 request->rq_export = NULL;
1028 if (request->rq_import != NULL) {
1029 class_import_put(request->rq_import);
1030 request->rq_import = NULL;
1032 if (request->rq_bulk != NULL)
1033 ptlrpc_free_bulk(request->rq_bulk);
1035 OBD_FREE(request, sizeof(*request));
1039 void ptlrpc_free_req(struct ptlrpc_request *request)
1041 __ptlrpc_free_req(request, 0);
1044 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1045 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1048 LASSERT(spin_is_locked(&request->rq_import->imp_lock));
1050 (void)__ptlrpc_req_finished(request, 1);
1053 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1056 if (request == NULL)
1059 if (request == (void *)(unsigned long)(0x5a5a5a5a5a5a5a5a) ||
1060 request->rq_reqmsg == (void *)(unsigned long)(0x5a5a5a5a5a5a5a5a)) {
1061 CERROR("dereferencing freed request (bug 575)\n");
1066 DEBUG_REQ(D_INFO, request, "refcount now %u",
1067 atomic_read(&request->rq_refcount) - 1);
1069 if (atomic_dec_and_test(&request->rq_refcount)) {
1070 __ptlrpc_free_req(request, locked);
1077 void ptlrpc_req_finished(struct ptlrpc_request *request)
1079 __ptlrpc_req_finished(request, 0);
1082 /* Disengage the client's reply buffer from the network
1083 * NB does _NOT_ unregister any client-side bulk.
1084 * IDEMPOTENT, but _not_ safe against concurrent callers.
1085 * The request owner (i.e. the thread doing the I/O) must call...
1087 void ptlrpc_unregister_reply (struct ptlrpc_request *request)
1090 wait_queue_head_t *wq;
1091 struct l_wait_info lwi;
1093 LASSERT(!in_interrupt ()); /* might sleep */
1095 if (!ptlrpc_client_receiving_reply(request))
1098 rc = PtlMDUnlink (request->rq_reply_md_h);
1099 if (rc == PTL_INV_MD) {
1100 LASSERT (!ptlrpc_client_receiving_reply(request));
1104 LASSERT (rc == PTL_OK);
1106 if (request->rq_set == NULL)
1107 wq = &request->rq_set->set_waitq;
1109 wq = &request->rq_reply_waitq;
1112 /* Network access will complete in finite time but the HUGE
1113 * timeout lets us CWARN for visibility of sluggish NALs */
1114 lwi = LWI_TIMEOUT(300 * HZ, NULL, NULL);
1115 rc = l_wait_event (*wq, !ptlrpc_client_receiving_reply(request), &lwi);
1119 LASSERT (rc == -ETIMEDOUT);
1120 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout");
1124 /* caller must hold imp->imp_lock */
1125 void ptlrpc_free_committed(struct obd_import *imp)
1127 struct list_head *tmp, *saved;
1128 struct ptlrpc_request *req;
1129 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1132 LASSERT(imp != NULL);
1135 LASSERT(spin_is_locked(&imp->imp_lock));
1138 CDEBUG(D_HA, "%s: committing for last_committed "LPU64"\n",
1139 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1141 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1142 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1144 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1145 LASSERT(req != last_req);
1148 if (req->rq_import_generation < imp->imp_generation) {
1149 DEBUG_REQ(D_HA, req, "freeing request with old gen");
1153 if (req->rq_replay) {
1154 DEBUG_REQ(D_HA, req, "keeping (FL_REPLAY)");
1158 /* not yet committed */
1159 if (req->rq_transno > imp->imp_peer_committed_transno) {
1160 DEBUG_REQ(D_HA, req, "stopping search");
1164 DEBUG_REQ(D_HA, req, "committing (last_committed "LPU64")",
1165 imp->imp_peer_committed_transno);
1167 if (req->rq_commit_cb != NULL)
1168 req->rq_commit_cb(req);
1169 list_del_init(&req->rq_replay_list);
1170 __ptlrpc_req_finished(req, 1);
1177 void ptlrpc_cleanup_client(struct obd_import *imp)
1184 void ptlrpc_resend_req(struct ptlrpc_request *req)
1186 unsigned long flags;
1188 DEBUG_REQ(D_HA, req, "going to resend");
1189 req->rq_reqmsg->handle.cookie = 0;
1190 req->rq_status = -EAGAIN;
1192 spin_lock_irqsave (&req->rq_lock, flags);
1194 req->rq_timedout = 0;
1196 __u64 old_xid = req->rq_xid;
1198 /* ensure previous bulk fails */
1199 req->rq_xid = ptlrpc_next_xid();
1200 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1201 old_xid, req->rq_xid);
1203 ptlrpc_wake_client_req(req);
1204 spin_unlock_irqrestore (&req->rq_lock, flags);
1208 /* XXX: this function and rq_status are currently unused */
1209 void ptlrpc_restart_req(struct ptlrpc_request *req)
1211 unsigned long flags;
1213 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1214 req->rq_status = -ERESTARTSYS;
1216 spin_lock_irqsave (&req->rq_lock, flags);
1217 req->rq_restart = 1;
1218 req->rq_timedout = 0;
1219 ptlrpc_wake_client_req(req);
1220 spin_unlock_irqrestore (&req->rq_lock, flags);
1223 static int expired_request(void *data)
1225 struct ptlrpc_request *req = data;
1228 RETURN(ptlrpc_expire_one_request(req));
1231 static void interrupted_request(void *data)
1233 unsigned long flags;
1235 struct ptlrpc_request *req = data;
1236 DEBUG_REQ(D_HA, req, "request interrupted");
1237 spin_lock_irqsave (&req->rq_lock, flags);
1239 spin_unlock_irqrestore (&req->rq_lock, flags);
1242 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
1245 atomic_inc(&req->rq_refcount);
1249 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
1250 struct obd_import *imp)
1252 struct list_head *tmp;
1255 LASSERT(spin_is_locked(&imp->imp_lock));
1258 /* don't re-add requests that have been replayed */
1259 if (!list_empty(&req->rq_replay_list))
1262 LASSERT(imp->imp_replayable);
1263 /* Balanced in ptlrpc_free_committed, usually. */
1264 ptlrpc_request_addref(req);
1265 list_for_each_prev(tmp, &imp->imp_replay_list) {
1266 struct ptlrpc_request *iter =
1267 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1269 /* We may have duplicate transnos if we create and then
1270 * open a file, or for closes retained if to match creating
1271 * opens, so use req->rq_xid as a secondary key.
1272 * (See bugs 684, 685, and 428.)
1273 * XXX no longer needed, but all opens need transnos!
1275 if (iter->rq_transno > req->rq_transno)
1278 if (iter->rq_transno == req->rq_transno) {
1279 LASSERT(iter->rq_xid != req->rq_xid);
1280 if (iter->rq_xid > req->rq_xid)
1284 list_add(&req->rq_replay_list, &iter->rq_replay_list);
1288 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
1291 int ptlrpc_queue_wait(struct ptlrpc_request *req)
1295 struct l_wait_info lwi;
1296 struct obd_import *imp = req->rq_import;
1297 unsigned long flags;
1301 LASSERT(req->rq_set == NULL);
1302 LASSERT(!req->rq_receiving_reply);
1304 /* for distributed debugging */
1305 req->rq_reqmsg->status = current->pid;
1306 LASSERT(imp->imp_obd != NULL);
1307 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:ni:nid:opc "
1308 "%s:%s:%d:"LPU64":%s:"LPX64":%d\n", current->comm,
1309 imp->imp_obd->obd_uuid.uuid,
1310 req->rq_reqmsg->status, req->rq_xid,
1311 imp->imp_connection->c_peer.peer_ni->pni_name,
1312 imp->imp_connection->c_peer.peer_nid,
1313 req->rq_reqmsg->opc);
1315 /* Mark phase here for a little debug help */
1316 req->rq_phase = RQ_PHASE_RPC;
1318 spin_lock_irqsave(&imp->imp_lock, flags);
1319 req->rq_import_generation = imp->imp_generation;
1321 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1322 list_del(&req->rq_list);
1324 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1325 spin_unlock_irqrestore(&imp->imp_lock, flags);
1327 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
1329 ptlrpc_import_state_name(req->rq_send_state),
1330 ptlrpc_import_state_name(imp->imp_state));
1331 lwi = LWI_INTR(interrupted_request, req);
1332 rc = l_wait_event(req->rq_reply_waitq,
1333 (req->rq_send_state == imp->imp_state ||
1336 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d == 1)",
1338 ptlrpc_import_state_name(imp->imp_state),
1339 ptlrpc_import_state_name(req->rq_send_state),
1342 spin_lock_irqsave(&imp->imp_lock, flags);
1343 list_del_init(&req->rq_list);
1348 else if (req->rq_intr) {
1357 list_del_init(&req->rq_list);
1358 spin_unlock_irqrestore(&imp->imp_lock, flags);
1359 req->rq_status = rc; // XXX this ok?
1363 if (req->rq_resend) {
1364 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
1366 if (req->rq_bulk != NULL)
1367 ptlrpc_unregister_bulk (req);
1369 DEBUG_REQ(D_HA, req, "resending: ");
1372 /* XXX this is the same as ptlrpc_set_wait */
1373 LASSERT(list_empty(&req->rq_list));
1374 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1375 spin_unlock_irqrestore(&imp->imp_lock, flags);
1377 rc = ptl_send_rpc(req);
1379 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
1382 timeout = MAX(req->rq_timeout * HZ, 1);
1383 DEBUG_REQ(D_NET, req, "-- sleeping");
1385 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
1387 l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
1388 DEBUG_REQ(D_NET, req, "-- done sleeping");
1390 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:ni:nid:opc "
1391 "%s:%s:%d:"LPU64":%s:"LPX64":%d\n", current->comm,
1392 imp->imp_obd->obd_uuid.uuid,
1393 req->rq_reqmsg->status, req->rq_xid,
1394 imp->imp_connection->c_peer.peer_ni->pni_name,
1395 imp->imp_connection->c_peer.peer_nid,
1396 req->rq_reqmsg->opc);
1398 spin_lock_irqsave(&imp->imp_lock, flags);
1399 list_del_init(&req->rq_list);
1400 spin_unlock_irqrestore(&imp->imp_lock, flags);
1402 /* If the reply was received normally, this just grabs the spinlock
1403 * (ensuring the reply callback has returned), sees that
1404 * req->rq_receiving_reply is clear and returns. */
1405 ptlrpc_unregister_reply (req);
1408 GOTO(out, rc = -EIO);
1410 /* Resend if we need to, unless we were interrupted. */
1411 if (req->rq_resend && !req->rq_intr) {
1412 /* ...unless we were specifically told otherwise. */
1413 if (req->rq_no_resend)
1414 GOTO(out, rc = -ETIMEDOUT);
1415 spin_lock_irqsave(&imp->imp_lock, flags);
1420 /* Should only be interrupted if we timed out. */
1421 if (!req->rq_timedout)
1422 DEBUG_REQ(D_ERROR, req,
1423 "rq_intr set but rq_timedout not");
1424 GOTO(out, rc = -EINTR);
1427 if (req->rq_timedout) { /* non-recoverable timeout */
1428 GOTO(out, rc = -ETIMEDOUT);
1431 if (!req->rq_replied) {
1432 /* How can this be? -eeb */
1433 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
1435 GOTO(out, rc = req->rq_status);
1438 rc = after_reply (req);
1439 /* NB may return +ve success rc */
1440 if (req->rq_resend) {
1441 spin_lock_irqsave(&imp->imp_lock, flags);
1446 if (req->rq_bulk != NULL) {
1448 /* success so far. Note that anything going wrong
1449 * with bulk now, is EXTREMELY strange, since the
1450 * server must have believed that the bulk
1451 * tranferred OK before she replied with success to
1453 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
1454 brc = l_wait_event(req->rq_reply_waitq,
1455 !ptlrpc_bulk_active(req->rq_bulk),
1457 LASSERT(brc == 0 || brc == -ETIMEDOUT);
1459 LASSERT(brc == -ETIMEDOUT);
1460 DEBUG_REQ(D_ERROR, req, "bulk timed out");
1462 } else if (!req->rq_bulk->bd_success) {
1463 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1468 ptlrpc_unregister_bulk (req);
1471 LASSERT(!req->rq_receiving_reply);
1472 req->rq_phase = RQ_PHASE_INTERPRET;
1476 struct ptlrpc_replay_async_args {
1478 int praa_old_status;
1481 static int ptlrpc_replay_interpret(struct ptlrpc_request *req,
1482 void * data, int rc)
1484 struct ptlrpc_replay_async_args *aa = data;
1485 struct obd_import *imp = req->rq_import;
1486 unsigned long flags;
1488 atomic_dec(&imp->imp_replay_inflight);
1490 if (!req->rq_replied) {
1491 CERROR("request replay timed out, restarting recovery\n");
1492 GOTO(out, rc = -ETIMEDOUT);
1496 /* Clear reply swab mask; this is a new reply in sender's byte order */
1497 req->rq_rep_swab_mask = 0;
1499 LASSERT (req->rq_nob_received <= req->rq_replen);
1500 rc = lustre_unpack_msg(req->rq_repmsg, req->rq_nob_received);
1502 CERROR("unpack_rep failed: %d\n", rc);
1503 GOTO(out, rc = -EPROTO);
1506 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR &&
1507 req->rq_repmsg->status == -ENOTCONN)
1508 GOTO(out, rc = req->rq_repmsg->status);
1510 /* The transno had better not change over replay. */
1511 LASSERT(req->rq_reqmsg->transno == req->rq_repmsg->transno);
1513 DEBUG_REQ(D_HA, req, "got rep");
1515 /* let the callback do fixups, possibly including in the request */
1516 if (req->rq_replay_cb)
1517 req->rq_replay_cb(req);
1519 if (req->rq_replied && req->rq_repmsg->status != aa->praa_old_status) {
1520 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
1521 req->rq_repmsg->status, aa->praa_old_status);
1523 /* Put it back for re-replay. */
1524 req->rq_repmsg->status = aa->praa_old_status;
1527 spin_lock_irqsave(&imp->imp_lock, flags);
1528 imp->imp_last_replay_transno = req->rq_transno;
1529 spin_unlock_irqrestore(&imp->imp_lock, flags);
1531 /* continue with recovery */
1532 rc = ptlrpc_import_recovery_state_machine(imp);
1534 req->rq_send_state = aa->praa_old_state;
1537 /* this replay failed, so restart recovery */
1538 ptlrpc_connect_import(imp, NULL);
1544 int ptlrpc_replay_req(struct ptlrpc_request *req)
1546 struct ptlrpc_replay_async_args *aa;
1549 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
1551 /* Not handling automatic bulk replay yet (or ever?) */
1552 LASSERT(req->rq_bulk == NULL);
1554 DEBUG_REQ(D_HA, req, "REPLAY");
1556 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
1557 aa = (struct ptlrpc_replay_async_args *)&req->rq_async_args;
1558 memset(aa, 0, sizeof *aa);
1560 /* Prepare request to be resent with ptlrpcd */
1561 aa->praa_old_state = req->rq_send_state;
1562 req->rq_send_state = LUSTRE_IMP_REPLAY;
1563 req->rq_phase = RQ_PHASE_NEW;
1565 * Q: "How can a req get on the replay list if it wasn't replied?"
1566 * A: "If we failed during the replay of this request, it will still
1567 * be on the list, but rq_replied will have been reset to 0."
1569 if (req->rq_replied) {
1570 aa->praa_old_status = req->rq_repmsg->status;
1572 req->rq_replied = 0;
1575 req->rq_interpret_reply = ptlrpc_replay_interpret;
1576 atomic_inc(&req->rq_import->imp_replay_inflight);
1577 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
1579 ptlrpcd_add_req(req);
1583 void ptlrpc_abort_inflight(struct obd_import *imp)
1585 unsigned long flags;
1586 struct list_head *tmp, *n;
1589 /* Make sure that no new requests get processed for this import.
1590 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
1591 * this flag and then putting requests on sending_list or delayed_list.
1593 spin_lock_irqsave(&imp->imp_lock, flags);
1595 /* XXX locking? Maybe we should remove each request with the list
1596 * locked? Also, how do we know if the requests on the list are
1597 * being freed at this time?
1599 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
1600 struct ptlrpc_request *req =
1601 list_entry(tmp, struct ptlrpc_request, rq_list);
1603 DEBUG_REQ(D_HA, req, "inflight");
1605 spin_lock (&req->rq_lock);
1606 if (req->rq_import_generation < imp->imp_generation) {
1608 ptlrpc_wake_client_req(req);
1610 spin_unlock (&req->rq_lock);
1613 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
1614 struct ptlrpc_request *req =
1615 list_entry(tmp, struct ptlrpc_request, rq_list);
1617 DEBUG_REQ(D_HA, req, "aborting waiting req");
1619 spin_lock (&req->rq_lock);
1620 if (req->rq_import_generation < imp->imp_generation) {
1622 ptlrpc_wake_client_req(req);
1624 spin_unlock (&req->rq_lock);
1627 /* Last chance to free reqs left on the replay list, but we
1628 * will still leak reqs that haven't comitted. */
1629 if (imp->imp_replayable)
1630 ptlrpc_free_committed(imp);
1632 spin_unlock_irqrestore(&imp->imp_lock, flags);
1637 static __u64 ptlrpc_last_xid = 0;
1638 static spinlock_t ptlrpc_last_xid_lock = SPIN_LOCK_UNLOCKED;
1640 __u64 ptlrpc_next_xid(void)
1643 spin_lock(&ptlrpc_last_xid_lock);
1644 tmp = ++ptlrpc_last_xid;
1645 spin_unlock(&ptlrpc_last_xid_lock);