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>
38 #include <lustre_req_layout.h>
40 #include "ptlrpc_internal.h"
42 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
43 struct ptlrpc_client *cl)
45 cl->cli_request_portal = req_portal;
46 cl->cli_reply_portal = rep_portal;
50 struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid)
52 struct ptlrpc_connection *c;
54 lnet_process_id_t peer;
57 err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
59 CERROR("cannot find peer %s!\n", uuid->uuid);
63 c = ptlrpc_get_connection(peer, self, uuid);
65 memcpy(c->c_remote_uuid.uuid,
66 uuid->uuid, sizeof(c->c_remote_uuid.uuid));
69 CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c);
74 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,
75 struct obd_uuid *uuid)
78 lnet_process_id_t peer;
81 err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
83 CERROR("cannot find peer %s!\n", uuid->uuid);
92 static inline struct ptlrpc_bulk_desc *new_bulk(int npages, int type, int portal)
94 struct ptlrpc_bulk_desc *desc;
96 OBD_ALLOC(desc, offsetof (struct ptlrpc_bulk_desc, bd_iov[npages]));
100 spin_lock_init(&desc->bd_lock);
101 cfs_waitq_init(&desc->bd_waitq);
102 desc->bd_max_iov = npages;
103 desc->bd_iov_count = 0;
104 desc->bd_md_h = LNET_INVALID_HANDLE;
105 desc->bd_portal = portal;
106 desc->bd_type = type;
111 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
112 int npages, int type, int portal)
114 struct obd_import *imp = req->rq_import;
115 struct ptlrpc_bulk_desc *desc;
118 LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
119 desc = new_bulk(npages, type, portal);
123 desc->bd_import_generation = req->rq_import_generation;
124 desc->bd_import = class_import_get(imp);
127 desc->bd_cbid.cbid_fn = client_bulk_callback;
128 desc->bd_cbid.cbid_arg = desc;
130 /* This makes req own desc, and free it when she frees herself */
136 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
137 int npages, int type, int portal)
139 struct obd_export *exp = req->rq_export;
140 struct ptlrpc_bulk_desc *desc;
143 LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK);
145 desc = new_bulk(npages, type, portal);
149 desc->bd_export = class_export_get(exp);
152 desc->bd_cbid.cbid_fn = server_bulk_callback;
153 desc->bd_cbid.cbid_arg = desc;
155 /* NB we don't assign rq_bulk here; server-side requests are
156 * re-used, and the handler frees the bulk desc explicitly. */
161 void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
162 cfs_page_t *page, int pageoffset, int len)
164 LASSERT(desc->bd_iov_count < desc->bd_max_iov);
165 LASSERT(page != NULL);
166 LASSERT(pageoffset >= 0);
168 LASSERT(pageoffset + len <= CFS_PAGE_SIZE);
172 ptlrpc_add_bulk_page(desc, page, pageoffset, len);
175 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
179 LASSERT(desc != NULL);
180 LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
181 LASSERT(!desc->bd_network_rw); /* network hands off or */
182 LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
184 sptlrpc_enc_pool_put_pages(desc);
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_iov]));
196 void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
198 struct list_head *l, *tmp;
199 struct ptlrpc_request *req;
204 list_for_each_safe(l, tmp, &pool->prp_req_list) {
205 req = list_entry(l, struct ptlrpc_request, rq_list);
206 list_del(&req->rq_list);
207 LASSERT(req->rq_reqbuf);
208 LASSERT(req->rq_reqbuf_len == pool->prp_rq_size);
209 OBD_FREE(req->rq_reqbuf, pool->prp_rq_size);
210 OBD_FREE(req, sizeof(*req));
212 OBD_FREE(pool, sizeof(*pool));
215 void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
220 while (size < pool->prp_rq_size + SPTLRPC_MAX_PAYLOAD)
223 LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
224 "Trying to change pool size with nonempty pool "
225 "from %d to %d bytes\n", pool->prp_rq_size, size);
227 spin_lock(&pool->prp_lock);
228 pool->prp_rq_size = size;
229 for (i = 0; i < num_rq; i++) {
230 struct ptlrpc_request *req;
231 struct lustre_msg *msg;
233 spin_unlock(&pool->prp_lock);
234 OBD_ALLOC(req, sizeof(struct ptlrpc_request));
237 OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
239 OBD_FREE(req, sizeof(struct ptlrpc_request));
242 req->rq_reqbuf = msg;
243 req->rq_reqbuf_len = size;
245 spin_lock(&pool->prp_lock);
246 list_add_tail(&req->rq_list, &pool->prp_req_list);
248 spin_unlock(&pool->prp_lock);
252 struct ptlrpc_request_pool *ptlrpc_init_rq_pool(int num_rq, int msgsize,
253 void (*populate_pool)(struct ptlrpc_request_pool *, int))
255 struct ptlrpc_request_pool *pool;
257 OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
261 /* Request next power of two for the allocation, because internally
262 kernel would do exactly this */
264 spin_lock_init(&pool->prp_lock);
265 CFS_INIT_LIST_HEAD(&pool->prp_req_list);
266 pool->prp_rq_size = msgsize;
267 pool->prp_populate = populate_pool;
269 populate_pool(pool, num_rq);
271 if (list_empty(&pool->prp_req_list)) {
272 /* have not allocated a single request for the pool */
273 OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
279 static struct ptlrpc_request *ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
281 struct ptlrpc_request *request;
282 struct lustre_msg *reqbuf;
287 spin_lock(&pool->prp_lock);
289 /* See if we have anything in a pool, and bail out if nothing,
290 * in writeout path, where this matters, this is safe to do, because
291 * nothing is lost in this case, and when some in-flight requests
292 * complete, this code will be called again. */
293 if (unlikely(list_empty(&pool->prp_req_list))) {
294 spin_unlock(&pool->prp_lock);
298 request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
300 list_del(&request->rq_list);
301 spin_unlock(&pool->prp_lock);
303 LASSERT(request->rq_reqbuf);
304 LASSERT(request->rq_pool);
306 reqbuf = request->rq_reqbuf;
307 memset(request, 0, sizeof(*request));
308 request->rq_reqbuf = reqbuf;
309 request->rq_reqbuf_len = pool->prp_rq_size;
310 request->rq_pool = pool;
314 static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
316 struct ptlrpc_request_pool *pool = request->rq_pool;
318 spin_lock(&pool->prp_lock);
319 LASSERT(list_empty(&request->rq_list));
320 list_add_tail(&request->rq_list, &pool->prp_req_list);
321 spin_unlock(&pool->prp_lock);
324 static int __ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
325 __u32 version, int opcode,
326 int count, int *lengths, char **bufs,
327 struct ptlrpc_cli_ctx *ctx)
329 struct obd_import *imp = request->rq_import;
334 request->rq_cli_ctx = sptlrpc_cli_ctx_get(ctx);
336 rc = sptlrpc_req_get_ctx(request);
341 sptlrpc_req_set_flavor(request, opcode);
343 rc = lustre_pack_request(request, imp->imp_msg_magic, count,
346 LASSERT(!request->rq_pool);
350 lustre_msg_add_version(request->rq_reqmsg, version);
352 if (imp->imp_server_timeout)
353 request->rq_timeout = obd_timeout / 2;
355 request->rq_timeout = obd_timeout;
356 request->rq_send_state = LUSTRE_IMP_FULL;
357 request->rq_type = PTL_RPC_MSG_REQUEST;
358 request->rq_export = NULL;
360 request->rq_req_cbid.cbid_fn = request_out_callback;
361 request->rq_req_cbid.cbid_arg = request;
363 request->rq_reply_cbid.cbid_fn = reply_in_callback;
364 request->rq_reply_cbid.cbid_arg = request;
366 request->rq_phase = RQ_PHASE_NEW;
368 /* XXX FIXME bug 249 */
369 request->rq_request_portal = imp->imp_client->cli_request_portal;
370 request->rq_reply_portal = imp->imp_client->cli_reply_portal;
372 spin_lock_init(&request->rq_lock);
373 CFS_INIT_LIST_HEAD(&request->rq_list);
374 CFS_INIT_LIST_HEAD(&request->rq_replay_list);
375 CFS_INIT_LIST_HEAD(&request->rq_mod_list);
376 CFS_INIT_LIST_HEAD(&request->rq_ctx_chain);
377 CFS_INIT_LIST_HEAD(&request->rq_set_chain);
378 cfs_waitq_init(&request->rq_reply_waitq);
379 request->rq_xid = ptlrpc_next_xid();
380 atomic_set(&request->rq_refcount, 1);
382 lustre_msg_set_opc(request->rq_reqmsg, opcode);
383 lustre_msg_set_flags(request->rq_reqmsg, 0);
387 sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
389 class_import_put(imp);
393 int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
394 __u32 version, int opcode, char **bufs,
395 struct ptlrpc_cli_ctx *ctx)
399 count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
400 return __ptlrpc_request_bufs_pack(request, version, opcode, count,
401 request->rq_pill.rc_area[RCL_CLIENT],
405 int ptlrpc_request_pack(struct ptlrpc_request *request,
406 __u32 version, int opcode)
408 return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
412 struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
413 struct ptlrpc_request_pool *pool)
415 struct ptlrpc_request *request = NULL;
418 request = ptlrpc_prep_req_from_pool(pool);
421 OBD_ALLOC_PTR(request);
424 LASSERT((unsigned long)imp > 0x1000);
425 LASSERT(imp != LP_POISON);
426 LASSERT((unsigned long)imp->imp_client > 0x1000);
427 LASSERT(imp->imp_client != LP_POISON);
429 request->rq_import = class_import_get(imp);
431 CERROR("request allocation out of memory\n");
437 static struct ptlrpc_request *
438 ptlrpc_request_alloc_internal(struct obd_import *imp,
439 struct ptlrpc_request_pool * pool,
440 const struct req_format *format)
442 struct ptlrpc_request *request;
444 request = __ptlrpc_request_alloc(imp, pool);
448 req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
449 req_capsule_set(&request->rq_pill, format);
453 struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
454 const struct req_format *format)
456 return ptlrpc_request_alloc_internal(imp, NULL, format);
459 struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
460 struct ptlrpc_request_pool * pool,
461 const struct req_format *format)
463 return ptlrpc_request_alloc_internal(imp, pool, format);
466 void ptlrpc_request_free(struct ptlrpc_request *request)
468 if (request->rq_pool)
469 __ptlrpc_free_req_to_pool(request);
471 OBD_FREE_PTR(request);
474 struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
475 const struct req_format *format,
476 __u32 version, int opcode)
478 struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
482 rc = ptlrpc_request_pack(req, version, opcode);
484 ptlrpc_request_free(req);
491 struct ptlrpc_request *
492 ptlrpc_prep_req_pool(struct obd_import *imp,
493 __u32 version, int opcode,
494 int count, int *lengths, char **bufs,
495 struct ptlrpc_request_pool *pool)
497 struct ptlrpc_request *request;
500 request = __ptlrpc_request_alloc(imp, pool);
504 rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
505 lengths, bufs, NULL);
507 ptlrpc_request_free(request);
513 struct ptlrpc_request *
514 ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
515 int *lengths, char **bufs)
517 return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
521 struct ptlrpc_request_set *ptlrpc_prep_set(void)
523 struct ptlrpc_request_set *set;
526 OBD_ALLOC(set, sizeof *set);
529 CFS_INIT_LIST_HEAD(&set->set_requests);
530 cfs_waitq_init(&set->set_waitq);
531 set->set_remaining = 0;
532 spin_lock_init(&set->set_new_req_lock);
533 CFS_INIT_LIST_HEAD(&set->set_new_requests);
534 CFS_INIT_LIST_HEAD(&set->set_cblist);
539 /* Finish with this set; opposite of prep_set. */
540 void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
542 struct list_head *tmp;
543 struct list_head *next;
548 /* Requests on the set should either all be completed, or all be new */
549 expected_phase = (set->set_remaining == 0) ?
550 RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
551 list_for_each (tmp, &set->set_requests) {
552 struct ptlrpc_request *req =
553 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
555 LASSERT(req->rq_phase == expected_phase);
559 LASSERT(set->set_remaining == 0 || set->set_remaining == n);
561 list_for_each_safe(tmp, next, &set->set_requests) {
562 struct ptlrpc_request *req =
563 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
564 list_del_init(&req->rq_set_chain);
566 LASSERT(req->rq_phase == expected_phase);
568 if (req->rq_phase == RQ_PHASE_NEW) {
570 if (req->rq_interpret_reply != NULL) {
571 int (*interpreter)(struct ptlrpc_request *,
573 req->rq_interpret_reply;
575 /* higher level (i.e. LOV) failed;
576 * let the sub reqs clean up */
577 req->rq_status = -EBADR;
578 interpreter(req, &req->rq_async_args,
581 set->set_remaining--;
585 ptlrpc_req_finished (req);
588 LASSERT(set->set_remaining == 0);
590 OBD_FREE(set, sizeof(*set));
594 int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
595 set_interpreter_func fn, void *data)
597 struct ptlrpc_set_cbdata *cbdata;
599 OBD_ALLOC_PTR(cbdata);
603 cbdata->psc_interpret = fn;
604 cbdata->psc_data = data;
605 list_add_tail(&cbdata->psc_item, &set->set_cblist);
610 void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
611 struct ptlrpc_request *req)
613 /* The set takes over the caller's request reference */
614 list_add_tail(&req->rq_set_chain, &set->set_requests);
616 set->set_remaining++;
618 atomic_inc(&req->rq_import->imp_inflight);
621 /* lock so many callers can add things, the context that owns the set
622 * is supposed to notice these and move them into the set proper. */
623 void ptlrpc_set_add_new_req(struct ptlrpc_request_set *set,
624 struct ptlrpc_request *req)
626 spin_lock(&set->set_new_req_lock);
627 /* The set takes over the caller's request reference */
628 list_add_tail(&req->rq_set_chain, &set->set_new_requests);
630 spin_unlock(&set->set_new_req_lock);
634 * Based on the current state of the import, determine if the request
635 * can be sent, is an error, or should be delayed.
637 * Returns true if this request should be delayed. If false, and
638 * *status is set, then the request can not be sent and *status is the
639 * error code. If false and status is 0, then request can be sent.
641 * The imp->imp_lock must be held.
643 static int ptlrpc_import_delay_req(struct obd_import *imp,
644 struct ptlrpc_request *req, int *status)
649 LASSERT (status != NULL);
652 if (req->rq_ctx_init || req->rq_ctx_fini) {
653 /* always allow ctx init/fini rpc go through */
654 } else if (imp->imp_state == LUSTRE_IMP_NEW) {
655 DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
658 } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
659 DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
661 } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
662 imp->imp_state == LUSTRE_IMP_CONNECTING) {
663 /* allow CONNECT even if import is invalid */ ;
664 } else if (imp->imp_invalid) {
665 /* if it is mgc, wait for recovry. b=13464 */
666 if (imp->imp_recon_bk && !imp->imp_obd->obd_no_recov)
668 /* If the import has been invalidated (such as by an OST
669 * failure) the request must fail with -ESHUTDOWN. This
670 * indicates the requests should be discarded; an -EIO
671 * may result in a resend of the request. */
672 if (!imp->imp_deactive)
673 DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
674 *status = -ESHUTDOWN; /* bz 12940 */
675 } else if (req->rq_import_generation != imp->imp_generation) {
676 DEBUG_REQ(D_ERROR, req, "req wrong generation:");
678 } else if (req->rq_send_state != imp->imp_state) {
679 if (imp->imp_obd->obd_no_recov || imp->imp_dlm_fake ||
681 *status = -EWOULDBLOCK;
689 static int ptlrpc_check_reply(struct ptlrpc_request *req)
694 /* serialise with network callback */
695 spin_lock(&req->rq_lock);
700 if (req->rq_net_err && !req->rq_timedout) {
701 spin_unlock(&req->rq_lock);
702 rc = ptlrpc_expire_one_request(req);
703 spin_lock(&req->rq_lock);
717 spin_unlock(&req->rq_lock);
718 DEBUG_REQ(D_NET, req, "rc = %d for", rc);
722 static int ptlrpc_check_status(struct ptlrpc_request *req)
727 err = lustre_msg_get_status(req->rq_repmsg);
728 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
729 struct obd_import *imp = req->rq_import;
730 __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
731 LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
732 " with %s. The %s operation failed with %d\n",
733 libcfs_nid2str(imp->imp_connection->c_peer.nid),
734 ll_opcode2str(opc), err);
735 RETURN(err < 0 ? err : -EINVAL);
739 DEBUG_REQ(D_INFO, req, "status is %d", err);
740 } else if (err > 0) {
741 /* XXX: translate this error from net to host */
742 DEBUG_REQ(D_INFO, req, "status is %d", err);
748 static int after_reply(struct ptlrpc_request *req)
750 struct obd_import *imp = req->rq_import;
751 struct obd_device *obd = req->rq_import->imp_obd;
753 struct timeval work_start;
757 LASSERT(!req->rq_receiving_reply);
759 LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
761 /* NB Until this point, the whole of the incoming message,
762 * including buflens, status etc is in the sender's byte order. */
764 /* Clear reply swab mask; this is a new reply in sender's byte order */
765 req->rq_rep_swab_mask = 0;
767 rc = sptlrpc_cli_unwrap_reply(req);
769 DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
773 /* security layer unwrap might ask resend this request */
777 rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
779 DEBUG_REQ(D_ERROR, req, "unpack_rep failed: %d", rc);
783 rc = lustre_unpack_rep_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
785 DEBUG_REQ(D_ERROR, req, "unpack ptlrpc body failed: %d", rc);
789 do_gettimeofday(&work_start);
790 timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
791 if (obd->obd_svc_stats != NULL)
792 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
795 if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
796 lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
797 DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
798 lustre_msg_get_type(req->rq_repmsg));
802 rc = ptlrpc_check_status(req);
803 imp->imp_connect_error = rc;
806 /* Either we've been evicted, or the server has failed for
807 * some reason. Try to reconnect, and if that fails, punt to
809 if (ll_rpc_recoverable_error(rc)) {
810 if (req->rq_send_state != LUSTRE_IMP_FULL ||
811 imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
814 ptlrpc_request_handle_notconn(req);
818 /* Let's look if server send slv. Do it only for RPC with
820 if (imp->imp_obd->obd_namespace) {
821 /* Disconnect rpc is sent when namespace is already
822 * destroyed. Let's check this and will not try update
824 ldlm_cli_update_pool(req);
828 /* Store transno in reqmsg for replay. */
829 req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
830 lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
832 if (req->rq_import->imp_replayable) {
833 spin_lock(&imp->imp_lock);
834 /* no point in adding already-committed requests to the replay
835 * list, we will just remove them immediately. b=9829 */
836 if (req->rq_transno != 0 &&
838 lustre_msg_get_last_committed(req->rq_repmsg) ||
840 ptlrpc_retain_replayable_request(req, imp);
841 else if (req->rq_commit_cb != NULL) {
842 spin_unlock(&imp->imp_lock);
843 req->rq_commit_cb(req);
844 spin_lock(&imp->imp_lock);
847 /* Replay-enabled imports return commit-status information. */
848 if (lustre_msg_get_last_committed(req->rq_repmsg)) {
849 imp->imp_peer_committed_transno =
850 lustre_msg_get_last_committed(req->rq_repmsg);
852 ptlrpc_free_committed(imp);
853 spin_unlock(&imp->imp_lock);
859 static int ptlrpc_send_new_req(struct ptlrpc_request *req)
861 struct obd_import *imp;
865 LASSERT(req->rq_phase == RQ_PHASE_NEW);
866 if (req->rq_sent && (req->rq_sent > CURRENT_SECONDS))
869 req->rq_phase = RQ_PHASE_RPC;
871 imp = req->rq_import;
872 spin_lock(&imp->imp_lock);
874 req->rq_import_generation = imp->imp_generation;
876 if (ptlrpc_import_delay_req(imp, req, &rc)) {
877 spin_lock (&req->rq_lock);
879 spin_unlock (&req->rq_lock);
881 DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
883 lustre_msg_get_status(req->rq_reqmsg) ,
884 ptlrpc_import_state_name(req->rq_send_state),
885 ptlrpc_import_state_name(imp->imp_state));
886 LASSERT(list_empty (&req->rq_list));
888 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
889 spin_unlock(&imp->imp_lock);
894 spin_unlock(&imp->imp_lock);
896 req->rq_phase = RQ_PHASE_INTERPRET;
900 /* XXX this is the same as ptlrpc_queue_wait */
901 LASSERT(list_empty(&req->rq_list));
902 list_add_tail(&req->rq_list, &imp->imp_sending_list);
903 spin_unlock(&imp->imp_lock);
905 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
907 rc = sptlrpc_req_refresh_ctx(req, -1);
913 /* here begins timeout counting */
914 req->rq_sent = CURRENT_SECONDS;
915 req->rq_wait_ctx = 1;
920 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
921 " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
922 imp->imp_obd->obd_uuid.uuid,
923 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
924 libcfs_nid2str(imp->imp_connection->c_peer.nid),
925 lustre_msg_get_opc(req->rq_reqmsg));
927 rc = ptl_send_rpc(req, 0);
929 DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
936 /* this sends any unsent RPCs in @set and returns TRUE if all are sent */
937 int ptlrpc_check_set(struct ptlrpc_request_set *set)
939 struct list_head *tmp;
940 int force_timer_recalc = 0;
943 if (set->set_remaining == 0)
946 list_for_each(tmp, &set->set_requests) {
947 struct ptlrpc_request *req =
948 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
949 struct obd_import *imp = req->rq_import;
952 if (req->rq_phase == RQ_PHASE_NEW &&
953 ptlrpc_send_new_req(req)) {
954 force_timer_recalc = 1;
956 /* delayed send - skip */
957 if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
960 if (!(req->rq_phase == RQ_PHASE_RPC ||
961 req->rq_phase == RQ_PHASE_BULK ||
962 req->rq_phase == RQ_PHASE_INTERPRET ||
963 req->rq_phase == RQ_PHASE_COMPLETE)) {
964 DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
968 if (req->rq_phase == RQ_PHASE_COMPLETE)
971 if (req->rq_phase == RQ_PHASE_INTERPRET)
972 GOTO(interpret, req->rq_status);
974 if (req->rq_net_err && !req->rq_timedout)
975 ptlrpc_expire_one_request(req);
978 ptlrpc_unregister_reply(req);
980 if (req->rq_status == 0)
981 req->rq_status = -EIO;
982 req->rq_phase = RQ_PHASE_INTERPRET;
984 spin_lock(&imp->imp_lock);
985 list_del_init(&req->rq_list);
986 spin_unlock(&imp->imp_lock);
988 GOTO(interpret, req->rq_status);
991 /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
992 * will only be set after rq_timedout, but the oig waiting
993 * path sets rq_intr irrespective of whether ptlrpcd has
994 * seen a timeout. our policy is to only interpret
995 * interrupted rpcs after they have timed out */
996 if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
998 /* NB could be on delayed list */
999 ptlrpc_unregister_reply(req);
1000 req->rq_status = -EINTR;
1001 req->rq_phase = RQ_PHASE_INTERPRET;
1003 spin_lock(&imp->imp_lock);
1004 list_del_init(&req->rq_list);
1005 spin_unlock(&imp->imp_lock);
1007 GOTO(interpret, req->rq_status);
1010 if (req->rq_phase == RQ_PHASE_RPC) {
1011 if (req->rq_timedout || req->rq_resend ||
1012 req->rq_waiting || req->rq_wait_ctx) {
1015 /* rq_wait_ctx is only touched in ptlrpcd,
1016 * no lock needed here.
1018 if (req->rq_wait_ctx)
1021 ptlrpc_unregister_reply(req);
1023 spin_lock(&imp->imp_lock);
1025 if (ptlrpc_import_delay_req(imp, req, &status)){
1026 spin_unlock(&imp->imp_lock);
1030 list_del_init(&req->rq_list);
1032 req->rq_status = status;
1033 req->rq_phase = RQ_PHASE_INTERPRET;
1034 spin_unlock(&imp->imp_lock);
1035 GOTO(interpret, req->rq_status);
1037 if (req->rq_no_resend && !req->rq_wait_ctx) {
1038 req->rq_status = -ENOTCONN;
1039 req->rq_phase = RQ_PHASE_INTERPRET;
1040 spin_unlock(&imp->imp_lock);
1041 GOTO(interpret, req->rq_status);
1043 list_add_tail(&req->rq_list,
1044 &imp->imp_sending_list);
1046 spin_unlock(&imp->imp_lock);
1048 req->rq_waiting = 0;
1049 if (req->rq_resend) {
1050 lustre_msg_add_flags(req->rq_reqmsg,
1053 __u64 old_xid = req->rq_xid;
1055 ptlrpc_unregister_bulk (req);
1057 /* ensure previous bulk fails */
1058 req->rq_xid = ptlrpc_next_xid();
1059 CDEBUG(D_HA, "resend bulk "
1062 old_xid, req->rq_xid);
1066 status = sptlrpc_req_refresh_ctx(req, -1);
1069 req->rq_status = status;
1070 force_timer_recalc = 1;
1072 if (!req->rq_wait_ctx) {
1073 /* begins timeout counting */
1074 req->rq_sent = CURRENT_SECONDS;
1075 req->rq_wait_ctx = 1;
1080 req->rq_wait_ctx = 0;
1083 rc = ptl_send_rpc(req, 0);
1085 DEBUG_REQ(D_HA, req, "send failed (%d)",
1087 force_timer_recalc = 1;
1088 req->rq_net_err = 1;
1090 /* need to reset the timeout */
1091 force_timer_recalc = 1;
1094 /* Still waiting for a reply? */
1095 if (ptlrpc_client_receiving_reply(req))
1098 /* Did we actually receive a reply? */
1099 if (!ptlrpc_client_replied(req))
1102 spin_lock(&imp->imp_lock);
1103 list_del_init(&req->rq_list);
1104 spin_unlock(&imp->imp_lock);
1106 req->rq_status = after_reply(req);
1107 if (req->rq_resend) {
1108 /* Add this req to the delayed list so
1109 it can be errored if the import is
1110 evicted after recovery. */
1111 spin_lock(&imp->imp_lock);
1112 list_add_tail(&req->rq_list,
1113 &imp->imp_delayed_list);
1114 spin_unlock(&imp->imp_lock);
1118 /* If there is no bulk associated with this request,
1119 * then we're done and should let the interpreter
1120 * process the reply. Similarly if the RPC returned
1121 * an error, and therefore the bulk will never arrive.
1123 if (req->rq_bulk == NULL || req->rq_status != 0) {
1124 req->rq_phase = RQ_PHASE_INTERPRET;
1125 GOTO(interpret, req->rq_status);
1128 req->rq_phase = RQ_PHASE_BULK;
1131 LASSERT(req->rq_phase == RQ_PHASE_BULK);
1132 if (ptlrpc_bulk_active(req->rq_bulk))
1135 if (!req->rq_bulk->bd_success) {
1136 /* The RPC reply arrived OK, but the bulk screwed
1137 * up! Dead wierd since the server told us the RPC
1138 * was good after getting the REPLY for her GET or
1139 * the ACK for her PUT. */
1140 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1144 req->rq_phase = RQ_PHASE_INTERPRET;
1147 LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
1148 LASSERT(!req->rq_receiving_reply);
1150 ptlrpc_unregister_reply(req);
1151 if (req->rq_bulk != NULL)
1152 ptlrpc_unregister_bulk (req);
1154 if (req->rq_interpret_reply != NULL) {
1155 int (*interpreter)(struct ptlrpc_request *,void *,int) =
1156 req->rq_interpret_reply;
1157 req->rq_status = interpreter(req, &req->rq_async_args,
1160 req->rq_phase = RQ_PHASE_COMPLETE;
1162 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
1163 "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1164 imp->imp_obd->obd_uuid.uuid,
1165 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1166 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1167 lustre_msg_get_opc(req->rq_reqmsg));
1169 set->set_remaining--;
1171 atomic_dec(&imp->imp_inflight);
1172 cfs_waitq_signal(&imp->imp_recovery_waitq);
1175 /* If we hit an error, we want to recover promptly. */
1176 RETURN(set->set_remaining == 0 || force_timer_recalc);
1179 int ptlrpc_expire_one_request(struct ptlrpc_request *req)
1181 struct obd_import *imp = req->rq_import;
1185 DEBUG_REQ(D_ERROR|D_NETERROR, req, "%s (sent at %lu, %lus ago)",
1186 req->rq_net_err ? "network error" : "timeout",
1187 (long)req->rq_sent, CURRENT_SECONDS - req->rq_sent);
1189 if (imp != NULL && obd_debug_peer_on_timeout)
1190 LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
1192 spin_lock(&req->rq_lock);
1193 req->rq_timedout = 1;
1194 req->rq_wait_ctx = 0;
1195 spin_unlock(&req->rq_lock);
1197 ptlrpc_unregister_reply (req);
1199 if (obd_dump_on_timeout)
1200 libcfs_debug_dumplog();
1202 if (req->rq_bulk != NULL)
1203 ptlrpc_unregister_bulk (req);
1206 DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
1210 /* The DLM server doesn't want recovery run on its imports. */
1211 if (imp->imp_dlm_fake)
1214 /* If this request is for recovery or other primordial tasks,
1215 * then error it out here. */
1216 if (req->rq_ctx_init || req->rq_ctx_fini ||
1217 req->rq_send_state != LUSTRE_IMP_FULL ||
1218 imp->imp_obd->obd_no_recov) {
1219 spin_lock(&req->rq_lock);
1220 req->rq_status = -ETIMEDOUT;
1222 spin_unlock(&req->rq_lock);
1226 /* if request can't be resend we can't wait answer after timeout */
1227 if (req->rq_no_resend) {
1228 DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
1232 ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
1237 int ptlrpc_expired_set(void *data)
1239 struct ptlrpc_request_set *set = data;
1240 struct list_head *tmp;
1241 time_t now = CURRENT_SECONDS;
1244 LASSERT(set != NULL);
1246 /* A timeout expired; see which reqs it applies to... */
1247 list_for_each (tmp, &set->set_requests) {
1248 struct ptlrpc_request *req =
1249 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1251 /* request in-flight? */
1252 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting &&
1254 (req->rq_phase == RQ_PHASE_BULK)))
1257 if (req->rq_timedout || /* already dealt with */
1258 req->rq_sent + req->rq_timeout > now) /* not expired */
1261 /* deal with this guy */
1262 ptlrpc_expire_one_request (req);
1265 /* When waiting for a whole set, we always to break out of the
1266 * sleep so we can recalculate the timeout, or enable interrupts
1267 * iff everyone's timed out.
1272 void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
1274 spin_lock(&req->rq_lock);
1276 spin_unlock(&req->rq_lock);
1279 void ptlrpc_interrupted_set(void *data)
1281 struct ptlrpc_request_set *set = data;
1282 struct list_head *tmp;
1284 LASSERT(set != NULL);
1285 CERROR("INTERRUPTED SET %p\n", set);
1287 list_for_each(tmp, &set->set_requests) {
1288 struct ptlrpc_request *req =
1289 list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1291 if (req->rq_phase != RQ_PHASE_RPC)
1294 ptlrpc_mark_interrupted(req);
1298 int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
1300 struct list_head *tmp;
1301 time_t now = CURRENT_SECONDS;
1304 struct ptlrpc_request *req;
1307 SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
1309 list_for_each(tmp, &set->set_requests) {
1310 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1312 /* request in-flight? */
1313 if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) ||
1314 (req->rq_phase == RQ_PHASE_BULK) ||
1315 (req->rq_phase == RQ_PHASE_NEW)))
1318 if (req->rq_timedout) /* already timed out */
1321 if (req->rq_phase == RQ_PHASE_NEW)
1322 deadline = req->rq_sent;
1324 deadline = req->rq_sent + req->rq_timeout;
1326 if (deadline <= now) /* actually expired already */
1327 timeout = 1; /* ASAP */
1328 else if (timeout == 0 || timeout > deadline - now)
1329 timeout = deadline - now;
1334 int ptlrpc_set_wait(struct ptlrpc_request_set *set)
1336 struct list_head *tmp;
1337 struct ptlrpc_request *req;
1338 struct l_wait_info lwi;
1342 if (list_empty(&set->set_requests))
1345 list_for_each(tmp, &set->set_requests) {
1346 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1347 if (req->rq_phase == RQ_PHASE_NEW)
1348 (void)ptlrpc_send_new_req(req);
1352 timeout = ptlrpc_set_next_timeout(set);
1354 /* wait until all complete, interrupted, or an in-flight
1356 CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
1358 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
1360 ptlrpc_interrupted_set, set);
1361 rc = l_wait_event(set->set_waitq, ptlrpc_check_set(set), &lwi);
1363 LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
1365 /* -EINTR => all requests have been flagged rq_intr so next
1367 * -ETIMEOUTD => someone timed out. When all reqs have
1368 * timed out, signals are enabled allowing completion with
1370 * I don't really care if we go once more round the loop in
1371 * the error cases -eeb. */
1372 } while (rc != 0 || set->set_remaining != 0);
1374 LASSERT(set->set_remaining == 0);
1377 list_for_each(tmp, &set->set_requests) {
1378 req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
1380 LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
1381 if (req->rq_status != 0)
1382 rc = req->rq_status;
1385 if (set->set_interpret != NULL) {
1386 int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
1388 rc = interpreter (set, set->set_arg, rc);
1390 struct ptlrpc_set_cbdata *cbdata, *n;
1393 list_for_each_entry_safe(cbdata, n,
1394 &set->set_cblist, psc_item) {
1395 list_del_init(&cbdata->psc_item);
1396 err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
1399 OBD_FREE_PTR(cbdata);
1406 static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
1409 if (request == NULL) {
1414 LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
1415 LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
1416 LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
1417 LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
1418 LASSERT(request->rq_cli_ctx);
1420 req_capsule_fini(&request->rq_pill);
1422 /* We must take it off the imp_replay_list first. Otherwise, we'll set
1423 * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
1424 if (request->rq_import != NULL) {
1426 spin_lock(&request->rq_import->imp_lock);
1427 list_del_init(&request->rq_mod_list);
1428 list_del_init(&request->rq_replay_list);
1430 spin_unlock(&request->rq_import->imp_lock);
1432 LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
1434 if (atomic_read(&request->rq_refcount) != 0) {
1435 DEBUG_REQ(D_ERROR, request,
1436 "freeing request with nonzero refcount");
1440 if (request->rq_repbuf != NULL)
1441 sptlrpc_cli_free_repbuf(request);
1442 if (request->rq_export != NULL) {
1443 class_export_put(request->rq_export);
1444 request->rq_export = NULL;
1446 if (request->rq_import != NULL) {
1447 class_import_put(request->rq_import);
1448 request->rq_import = NULL;
1450 if (request->rq_bulk != NULL)
1451 ptlrpc_free_bulk(request->rq_bulk);
1453 if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
1454 sptlrpc_cli_free_reqbuf(request);
1456 sptlrpc_req_put_ctx(request, !locked);
1458 if (request->rq_pool)
1459 __ptlrpc_free_req_to_pool(request);
1461 OBD_FREE(request, sizeof(*request));
1465 void ptlrpc_free_req(struct ptlrpc_request *request)
1467 __ptlrpc_free_req(request, 0);
1470 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
1471 void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
1473 LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
1474 (void)__ptlrpc_req_finished(request, 1);
1477 static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
1480 if (request == NULL)
1483 if (request == LP_POISON ||
1484 request->rq_reqmsg == LP_POISON) {
1485 CERROR("dereferencing freed request (bug 575)\n");
1490 DEBUG_REQ(D_INFO, request, "refcount now %u",
1491 atomic_read(&request->rq_refcount) - 1);
1493 if (atomic_dec_and_test(&request->rq_refcount)) {
1494 __ptlrpc_free_req(request, locked);
1501 void ptlrpc_req_finished(struct ptlrpc_request *request)
1503 __ptlrpc_req_finished(request, 0);
1506 __u64 ptlrpc_req_xid(struct ptlrpc_request *request)
1508 return request->rq_xid;
1510 EXPORT_SYMBOL(ptlrpc_req_xid);
1512 /* Disengage the client's reply buffer from the network
1513 * NB does _NOT_ unregister any client-side bulk.
1514 * IDEMPOTENT, but _not_ safe against concurrent callers.
1515 * The request owner (i.e. the thread doing the I/O) must call...
1517 void ptlrpc_unregister_reply (struct ptlrpc_request *request)
1521 struct l_wait_info lwi;
1523 LASSERT(!in_interrupt ()); /* might sleep */
1525 if (!ptlrpc_client_receiving_reply(request))
1528 LNetMDUnlink (request->rq_reply_md_h);
1530 /* We have to l_wait_event() whatever the result, to give liblustre
1531 * a chance to run reply_in_callback() */
1533 if (request->rq_set != NULL)
1534 wq = &request->rq_set->set_waitq;
1536 wq = &request->rq_reply_waitq;
1539 /* Network access will complete in finite time but the HUGE
1540 * timeout lets us CWARN for visibility of sluggish NALs */
1541 lwi = LWI_TIMEOUT(cfs_time_seconds(300), NULL, NULL);
1542 rc = l_wait_event (*wq, !ptlrpc_client_receiving_reply(request), &lwi);
1546 LASSERT (rc == -ETIMEDOUT);
1547 DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout");
1551 /* caller must hold imp->imp_lock */
1552 void ptlrpc_free_committed(struct obd_import *imp)
1554 struct list_head *tmp, *saved;
1555 struct ptlrpc_request *req;
1556 struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
1559 LASSERT(imp != NULL);
1561 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1564 if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
1565 imp->imp_generation == imp->imp_last_generation_checked) {
1566 CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
1567 imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
1571 CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
1572 imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
1573 imp->imp_generation);
1574 imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
1575 imp->imp_last_generation_checked = imp->imp_generation;
1577 list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
1578 req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1580 /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
1581 LASSERT(req != last_req);
1584 if (req->rq_import_generation < imp->imp_generation) {
1585 DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
1589 if (req->rq_replay) {
1590 DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
1594 /* not yet committed */
1595 if (req->rq_transno > imp->imp_peer_committed_transno) {
1596 DEBUG_REQ(D_RPCTRACE, req, "stopping search");
1600 DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
1601 imp->imp_peer_committed_transno);
1603 spin_lock(&req->rq_lock);
1605 spin_unlock(&req->rq_lock);
1606 if (req->rq_commit_cb != NULL)
1607 req->rq_commit_cb(req);
1608 list_del_init(&req->rq_replay_list);
1609 __ptlrpc_req_finished(req, 1);
1616 void ptlrpc_cleanup_client(struct obd_import *imp)
1623 void ptlrpc_resend_req(struct ptlrpc_request *req)
1625 DEBUG_REQ(D_HA, req, "going to resend");
1626 lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
1627 req->rq_status = -EAGAIN;
1629 spin_lock(&req->rq_lock);
1631 req->rq_net_err = 0;
1632 req->rq_timedout = 0;
1634 __u64 old_xid = req->rq_xid;
1636 /* ensure previous bulk fails */
1637 req->rq_xid = ptlrpc_next_xid();
1638 CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
1639 old_xid, req->rq_xid);
1641 ptlrpc_wake_client_req(req);
1642 spin_unlock(&req->rq_lock);
1645 /* XXX: this function and rq_status are currently unused */
1646 void ptlrpc_restart_req(struct ptlrpc_request *req)
1648 DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
1649 req->rq_status = -ERESTARTSYS;
1651 spin_lock(&req->rq_lock);
1652 req->rq_restart = 1;
1653 req->rq_timedout = 0;
1654 ptlrpc_wake_client_req(req);
1655 spin_unlock(&req->rq_lock);
1658 static int expired_request(void *data)
1660 struct ptlrpc_request *req = data;
1663 /* some failure can suspend regular timeouts */
1664 if (ptlrpc_check_suspend())
1667 RETURN(ptlrpc_expire_one_request(req));
1670 static void interrupted_request(void *data)
1672 struct ptlrpc_request *req = data;
1673 DEBUG_REQ(D_HA, req, "request interrupted");
1674 spin_lock(&req->rq_lock);
1676 spin_unlock(&req->rq_lock);
1679 struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
1682 atomic_inc(&req->rq_refcount);
1686 void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
1687 struct obd_import *imp)
1689 struct list_head *tmp;
1691 LASSERT_SPIN_LOCKED(&imp->imp_lock);
1693 /* clear this for new requests that were resent as well
1694 as resent replayed requests. */
1695 lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
1697 /* don't re-add requests that have been replayed */
1698 if (!list_empty(&req->rq_replay_list))
1701 lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
1703 LASSERT(imp->imp_replayable);
1704 /* Balanced in ptlrpc_free_committed, usually. */
1705 ptlrpc_request_addref(req);
1706 list_for_each_prev(tmp, &imp->imp_replay_list) {
1707 struct ptlrpc_request *iter =
1708 list_entry(tmp, struct ptlrpc_request, rq_replay_list);
1710 /* We may have duplicate transnos if we create and then
1711 * open a file, or for closes retained if to match creating
1712 * opens, so use req->rq_xid as a secondary key.
1713 * (See bugs 684, 685, and 428.)
1714 * XXX no longer needed, but all opens need transnos!
1716 if (iter->rq_transno > req->rq_transno)
1719 if (iter->rq_transno == req->rq_transno) {
1720 LASSERT(iter->rq_xid != req->rq_xid);
1721 if (iter->rq_xid > req->rq_xid)
1725 list_add(&req->rq_replay_list, &iter->rq_replay_list);
1729 list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
1732 int ptlrpc_queue_wait(struct ptlrpc_request *req)
1736 struct l_wait_info lwi;
1737 struct obd_import *imp = req->rq_import;
1738 cfs_duration_t timeout = 0;
1741 LASSERT(req->rq_set == NULL);
1742 LASSERT(!req->rq_receiving_reply);
1743 atomic_inc(&imp->imp_inflight);
1745 /* for distributed debugging */
1746 lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
1747 LASSERT(imp->imp_obd != NULL);
1748 CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
1749 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1750 imp->imp_obd->obd_uuid.uuid,
1751 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1752 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1753 lustre_msg_get_opc(req->rq_reqmsg));
1755 /* Mark phase here for a little debug help */
1756 req->rq_phase = RQ_PHASE_RPC;
1758 spin_lock(&imp->imp_lock);
1760 req->rq_import_generation = imp->imp_generation;
1761 if (ptlrpc_import_delay_req(imp, req, &rc)) {
1762 list_del(&req->rq_list);
1764 list_add_tail(&req->rq_list, &imp->imp_delayed_list);
1765 spin_unlock(&imp->imp_lock);
1767 DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
1769 ptlrpc_import_state_name(req->rq_send_state),
1770 ptlrpc_import_state_name(imp->imp_state));
1771 lwi = LWI_INTR(interrupted_request, req);
1772 rc = l_wait_event(req->rq_reply_waitq,
1773 (req->rq_send_state == imp->imp_state ||
1774 req->rq_err || req->rq_intr),
1776 DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
1778 ptlrpc_import_state_name(imp->imp_state),
1779 ptlrpc_import_state_name(req->rq_send_state),
1780 req->rq_err, req->rq_intr);
1782 spin_lock(&imp->imp_lock);
1783 list_del_init(&req->rq_list);
1788 else if (req->rq_intr) {
1791 else if (req->rq_no_resend) {
1792 spin_unlock(&imp->imp_lock);
1793 GOTO(out, rc = -ETIMEDOUT);
1801 list_del_init(&req->rq_list);
1802 spin_unlock(&imp->imp_lock);
1803 req->rq_status = rc; // XXX this ok?
1807 if (req->rq_resend) {
1808 lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
1810 if (req->rq_bulk != NULL) {
1811 ptlrpc_unregister_bulk (req);
1813 /* bulk requests are supposed to be
1814 * idempotent, so we are free to bump the xid
1815 * here, which we need to do before
1816 * registering the bulk again (bug 6371).
1817 * print the old xid first for sanity.
1819 DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
1820 req->rq_xid = ptlrpc_next_xid();
1823 DEBUG_REQ(D_HA, req, "resending: ");
1826 /* XXX this is the same as ptlrpc_set_wait */
1827 LASSERT(list_empty(&req->rq_list));
1828 list_add_tail(&req->rq_list, &imp->imp_sending_list);
1829 spin_unlock(&imp->imp_lock);
1831 rc = sptlrpc_req_refresh_ctx(req, 0);
1834 /* we got fatal ctx refresh error, directly jump out
1835 * thus we can pass back the actual error code.
1837 spin_lock(&imp->imp_lock);
1838 list_del_init(&req->rq_list);
1839 spin_unlock(&imp->imp_lock);
1841 CERROR("Failed to refresh ctx of req %p: %d\n", req, rc);
1844 /* simulating we got error during send rpc */
1848 rc = ptl_send_rpc(req, 0);
1850 DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
1853 timeout = cfs_timeout_cap(cfs_time_seconds(req->rq_timeout));
1854 DEBUG_REQ(D_NET, req,
1855 "-- sleeping for "CFS_DURATION_T" jiffies", timeout);
1858 lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
1860 rc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
1861 if (rc == -ETIMEDOUT && ptlrpc_check_and_wait_suspend(req))
1865 CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
1866 "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
1867 imp->imp_obd->obd_uuid.uuid,
1868 lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
1869 libcfs_nid2str(imp->imp_connection->c_peer.nid),
1870 lustre_msg_get_opc(req->rq_reqmsg));
1872 spin_lock(&imp->imp_lock);
1873 list_del_init(&req->rq_list);
1874 spin_unlock(&imp->imp_lock);
1876 /* If the reply was received normally, this just grabs the spinlock
1877 * (ensuring the reply callback has returned), sees that
1878 * req->rq_receiving_reply is clear and returns. */
1879 ptlrpc_unregister_reply (req);
1882 GOTO(out, rc = -EIO);
1884 /* Resend if we need to, unless we were interrupted. */
1885 if (req->rq_resend && !req->rq_intr) {
1886 /* ...unless we were specifically told otherwise. */
1887 if (req->rq_no_resend)
1888 GOTO(out, rc = -ETIMEDOUT);
1889 spin_lock(&imp->imp_lock);
1894 /* Should only be interrupted if we timed out. */
1895 if (!req->rq_timedout)
1896 DEBUG_REQ(D_ERROR, req,
1897 "rq_intr set but rq_timedout not");
1898 GOTO(out, rc = -EINTR);
1901 if (req->rq_timedout) { /* non-recoverable timeout */
1902 GOTO(out, rc = -ETIMEDOUT);
1905 if (!req->rq_replied) {
1906 /* How can this be? -eeb */
1907 DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
1909 GOTO(out, rc = req->rq_status);
1912 rc = after_reply(req);
1913 /* NB may return +ve success rc */
1914 if (req->rq_resend) {
1915 spin_lock(&imp->imp_lock);
1920 if (req->rq_bulk != NULL) {
1922 /* success so far. Note that anything going wrong
1923 * with bulk now, is EXTREMELY strange, since the
1924 * server must have believed that the bulk
1925 * tranferred OK before she replied with success to
1927 lwi = LWI_TIMEOUT(timeout, NULL, NULL);
1928 brc = l_wait_event(req->rq_reply_waitq,
1929 !ptlrpc_bulk_active(req->rq_bulk),
1931 LASSERT(brc == 0 || brc == -ETIMEDOUT);
1933 LASSERT(brc == -ETIMEDOUT);
1934 DEBUG_REQ(D_ERROR, req, "bulk timed out");
1936 } else if (!req->rq_bulk->bd_success) {
1937 DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
1942 ptlrpc_unregister_bulk (req);
1945 LASSERT(!req->rq_receiving_reply);
1946 req->rq_phase = RQ_PHASE_INTERPRET;
1948 atomic_dec(&imp->imp_inflight);
1949 cfs_waitq_signal(&imp->imp_recovery_waitq);
1953 struct ptlrpc_replay_async_args {
1955 int praa_old_status;
1958 static int ptlrpc_replay_interpret(struct ptlrpc_request *req,
1959 void * data, int rc)
1961 struct ptlrpc_replay_async_args *aa = data;
1962 struct obd_import *imp = req->rq_import;
1965 atomic_dec(&imp->imp_replay_inflight);
1967 if (!req->rq_replied) {
1968 CERROR("request replay timed out, restarting recovery\n");
1969 GOTO(out, rc = -ETIMEDOUT);
1972 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
1973 (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
1974 lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
1975 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
1977 /* The transno had better not change over replay. */
1978 LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
1979 lustre_msg_get_transno(req->rq_repmsg));
1981 DEBUG_REQ(D_HA, req, "got rep");
1983 /* let the callback do fixups, possibly including in the request */
1984 if (req->rq_replay_cb)
1985 req->rq_replay_cb(req);
1987 if (req->rq_replied &&
1988 lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
1989 DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
1990 lustre_msg_get_status(req->rq_repmsg),
1991 aa->praa_old_status);
1993 /* Put it back for re-replay. */
1994 lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
1998 * Errors while replay can set transno to 0, but
1999 * imp_last_replay_transno shouldn't be set to 0 anyway
2001 if (req->rq_transno > 0) {
2002 spin_lock(&imp->imp_lock);
2003 LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
2004 imp->imp_last_replay_transno = req->rq_transno;
2005 spin_unlock(&imp->imp_lock);
2007 CERROR("Transno is 0 during replay!\n");
2008 /* continue with recovery */
2009 rc = ptlrpc_import_recovery_state_machine(imp);
2011 req->rq_send_state = aa->praa_old_state;
2014 /* this replay failed, so restart recovery */
2015 ptlrpc_connect_import(imp, NULL);
2020 int ptlrpc_replay_req(struct ptlrpc_request *req)
2022 struct ptlrpc_replay_async_args *aa;
2025 LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
2027 /* Not handling automatic bulk replay yet (or ever?) */
2028 LASSERT(req->rq_bulk == NULL);
2030 DEBUG_REQ(D_HA, req, "REPLAY");
2032 LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
2033 aa = (struct ptlrpc_replay_async_args *)&req->rq_async_args;
2034 memset(aa, 0, sizeof *aa);
2036 /* Prepare request to be resent with ptlrpcd */
2037 aa->praa_old_state = req->rq_send_state;
2038 req->rq_send_state = LUSTRE_IMP_REPLAY;
2039 req->rq_phase = RQ_PHASE_NEW;
2040 aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
2043 req->rq_interpret_reply = ptlrpc_replay_interpret;
2044 atomic_inc(&req->rq_import->imp_replay_inflight);
2045 ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
2047 ptlrpcd_add_req(req);
2051 void ptlrpc_abort_inflight(struct obd_import *imp)
2053 struct list_head *tmp, *n;
2056 /* Make sure that no new requests get processed for this import.
2057 * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
2058 * this flag and then putting requests on sending_list or delayed_list.
2060 spin_lock(&imp->imp_lock);
2062 /* XXX locking? Maybe we should remove each request with the list
2063 * locked? Also, how do we know if the requests on the list are
2064 * being freed at this time?
2066 list_for_each_safe(tmp, n, &imp->imp_sending_list) {
2067 struct ptlrpc_request *req =
2068 list_entry(tmp, struct ptlrpc_request, rq_list);
2070 DEBUG_REQ(D_RPCTRACE, req, "inflight");
2072 spin_lock (&req->rq_lock);
2073 if (req->rq_import_generation < imp->imp_generation) {
2075 ptlrpc_wake_client_req(req);
2077 spin_unlock (&req->rq_lock);
2080 list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
2081 struct ptlrpc_request *req =
2082 list_entry(tmp, struct ptlrpc_request, rq_list);
2084 DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
2086 spin_lock (&req->rq_lock);
2087 if (req->rq_import_generation < imp->imp_generation) {
2089 ptlrpc_wake_client_req(req);
2091 spin_unlock (&req->rq_lock);
2094 /* Last chance to free reqs left on the replay list, but we
2095 * will still leak reqs that haven't committed. */
2096 if (imp->imp_replayable)
2097 ptlrpc_free_committed(imp);
2099 spin_unlock(&imp->imp_lock);
2104 static __u64 ptlrpc_last_xid = 0;
2105 spinlock_t ptlrpc_last_xid_lock;
2107 __u64 ptlrpc_next_xid(void)
2110 spin_lock(&ptlrpc_last_xid_lock);
2111 tmp = ++ptlrpc_last_xid;
2112 spin_unlock(&ptlrpc_last_xid_lock);
2116 __u64 ptlrpc_sample_next_xid(void)
2119 spin_lock(&ptlrpc_last_xid_lock);
2120 tmp = ptlrpc_last_xid + 1;
2121 spin_unlock(&ptlrpc_last_xid_lock);
2124 EXPORT_SYMBOL(ptlrpc_sample_next_xid);