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.
22 #define DEBUG_SUBSYSTEM S_LDLM
25 #include <liblustre.h>
28 #include <linux/lustre_dlm.h>
29 #include <linux/obd_class.h>
30 #include <linux/obd.h>
32 #include "ldlm_internal.h"
34 static void interrupted_completion_wait(void *data)
38 struct lock_wait_data {
39 struct ldlm_lock *lwd_lock;
43 int ldlm_expired_completion_wait(void *data)
45 struct lock_wait_data *lwd = data;
46 struct ldlm_lock *lock = lwd->lwd_lock;
47 struct obd_import *imp;
48 struct obd_device *obd;
50 if (lock->l_conn_export == NULL) {
51 static unsigned long next_dump = 0, last_dump = 0;
53 if (ptlrpc_check_suspend())
56 LDLM_ERROR(lock, "lock timed out; not entering recovery in "
57 "server code, just going back to sleep");
58 if (time_after(jiffies, next_dump)) {
59 last_dump = next_dump;
60 next_dump = jiffies + 300 * HZ;
61 ldlm_namespace_dump(D_DLMTRACE,
62 lock->l_resource->lr_namespace);
64 portals_debug_dumplog();
69 obd = lock->l_conn_export->exp_obd;
70 imp = obd->u.cli.cl_import;
71 ptlrpc_fail_import(imp, lwd->lwd_generation);
72 LDLM_ERROR(lock, "lock timed out, entering recovery for %s@%s",
73 imp->imp_target_uuid.uuid,
74 imp->imp_connection->c_remote_uuid.uuid);
79 int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data)
81 /* XXX ALLOCATE - 160 bytes */
82 struct lock_wait_data lwd;
83 unsigned long irqflags;
84 struct obd_device *obd;
85 struct obd_import *imp = NULL;
86 struct l_wait_info lwi;
90 if (flags == LDLM_FL_WAIT_NOREPROC)
93 if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
94 LDLM_FL_BLOCK_CONV))) {
95 wake_up(&lock->l_waitq);
99 LDLM_DEBUG(lock, "client-side enqueue returned a blocked lock, "
101 ldlm_lock_dump(D_OTHER, lock, 0);
102 ldlm_reprocess_all(lock->l_resource);
106 obd = class_exp2obd(lock->l_conn_export);
108 /* if this is a local lock, then there is no import */
110 imp = obd->u.cli.cl_import;
114 if (flags & LDLM_FL_NO_TIMEOUT) {
115 LDLM_DEBUG(lock, "waiting indefinitely for group lock\n");
116 lwi = LWI_INTR(interrupted_completion_wait, &lwd);
118 lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ,
119 ldlm_expired_completion_wait,
120 interrupted_completion_wait, &lwd);
124 spin_lock_irqsave(&imp->imp_lock, irqflags);
125 lwd.lwd_generation = imp->imp_generation;
126 spin_unlock_irqrestore(&imp->imp_lock, irqflags);
129 /* Go to sleep until the lock is granted or cancelled. */
130 rc = l_wait_event(lock->l_waitq,
131 ((lock->l_req_mode == lock->l_granted_mode) ||
132 (lock->l_flags & LDLM_FL_FAILED)), &lwi);
134 if (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED) {
135 LDLM_DEBUG(lock, "client-side enqueue waking up: destroyed");
140 LDLM_DEBUG(lock, "client-side enqueue waking up: failed (%d)",
145 LDLM_DEBUG(lock, "client-side enqueue waking up: granted");
149 static int ldlm_cli_enqueue_local(struct ldlm_namespace *ns,
150 struct ldlm_res_id res_id,
152 ldlm_policy_data_t *policy,
155 ldlm_blocking_callback blocking,
156 ldlm_completion_callback completion,
157 ldlm_glimpse_callback glimpse,
158 void *data, __u32 lvb_len,
160 struct lustre_handle *lockh)
162 struct ldlm_lock *lock;
167 CERROR("Trying to enqueue local lock in a shadow namespace\n");
171 lock = ldlm_lock_create(ns, NULL, res_id, type, mode, blocking,
172 completion, glimpse, data, lvb_len);
174 GOTO(out_nolock, err = -ENOMEM);
175 LDLM_DEBUG(lock, "client-side local enqueue handler, new lock created");
177 ldlm_lock_addref_internal(lock, mode);
178 ldlm_lock2handle(lock, lockh);
179 lock->l_flags |= LDLM_FL_LOCAL;
180 if (*flags & LDLM_FL_ATOMIC_CB)
181 lock->l_flags |= LDLM_FL_ATOMIC_CB;
182 lock->l_lvb_swabber = lvb_swabber;
184 memcpy(&lock->l_policy_data, policy, sizeof(*policy));
185 if (type == LDLM_EXTENT)
186 memcpy(&lock->l_req_extent, &policy->l_extent,
187 sizeof(policy->l_extent));
189 err = ldlm_lock_enqueue(ns, &lock, policy, flags);
194 memcpy(policy, &lock->l_policy_data, sizeof(*policy));
195 if ((*flags) & LDLM_FL_LOCK_CHANGED)
196 memcpy(&res_id, &lock->l_resource->lr_name, sizeof(res_id));
198 LDLM_DEBUG_NOLOCK("client-side local enqueue handler END (lock %p)",
201 if (lock->l_completion_ast)
202 lock->l_completion_ast(lock, *flags, NULL);
204 LDLM_DEBUG(lock, "client-side local enqueue END");
212 static void failed_lock_cleanup(struct ldlm_namespace *ns,
213 struct ldlm_lock *lock,
214 struct lustre_handle *lockh, int mode)
216 /* Set a flag to prevent us from sending a CANCEL (bug 407) */
217 lock_res_and_lock(lock);
218 lock->l_flags |= LDLM_FL_LOCAL_ONLY;
219 unlock_res_and_lock(lock);
220 LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
222 ldlm_lock_decref_and_cancel(lockh, mode);
224 /* XXX - HACK because we shouldn't call ldlm_lock_destroy()
225 * from llite/file.c/ll_file_flock(). */
226 if (lock->l_resource->lr_type == LDLM_FLOCK) {
227 ldlm_lock_destroy(lock);
231 int ldlm_cli_enqueue(struct obd_export *exp,
232 struct ptlrpc_request *req,
233 struct ldlm_namespace *ns,
234 struct ldlm_res_id res_id,
236 ldlm_policy_data_t *policy,
239 ldlm_blocking_callback blocking,
240 ldlm_completion_callback completion,
241 ldlm_glimpse_callback glimpse,
246 struct lustre_handle *lockh)
248 struct ldlm_lock *lock;
249 struct ldlm_request *body;
250 struct ldlm_reply *reply;
251 int rc, size[3] = {0, sizeof(*body), lvb_len}, req_passed_in = 1;
252 int is_replay = *flags & LDLM_FL_REPLAY;
253 int cleanup_phase = 0;
258 rc = ldlm_cli_enqueue_local(ns, res_id, type, policy, mode,
259 flags, blocking, completion,
260 glimpse, data, lvb_len, lvb_swabber,
265 /* If we're replaying this lock, just check some invariants.
266 * If we're creating a new lock, get everything all setup nice. */
268 lock = ldlm_handle2lock(lockh);
269 LDLM_DEBUG(lock, "client-side enqueue START");
270 LASSERT(exp == lock->l_conn_export);
272 lock = ldlm_lock_create(ns, NULL, res_id, type, mode, blocking,
273 completion, glimpse, data, lvb_len);
276 /* for the local lock, add the reference */
277 ldlm_lock_addref_internal(lock, mode);
278 ldlm_lock2handle(lock, lockh);
279 lock->l_lvb_swabber = lvb_swabber;
281 memcpy(&lock->l_policy_data, policy, sizeof(*policy));
282 if (type == LDLM_EXTENT)
283 memcpy(&lock->l_req_extent, &policy->l_extent,
284 sizeof(policy->l_extent));
285 LDLM_DEBUG(lock, "client-side enqueue START");
288 /* lock not sent to server yet */
292 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
293 LDLM_ENQUEUE, 2, size, NULL);
295 GOTO(cleanup, rc = -ENOMEM);
299 LASSERTF(req->rq_reqmsg->buflens[MDS_REQ_INTENT_LOCKREQ_OFF] ==
300 sizeof(*body), "buflen[%d] = %d, not %d\n",
301 MDS_REQ_INTENT_LOCKREQ_OFF,
302 req->rq_reqmsg->buflens[MDS_REQ_INTENT_LOCKREQ_OFF],
305 /* Dump lock data into the request buffer */
306 body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_INTENT_LOCKREQ_OFF,
308 ldlm_lock2desc(lock, &body->lock_desc);
309 body->lock_flags = *flags;
311 memcpy(&body->lock_handle1, lockh, sizeof(*lockh));
313 /* Continue as normal. */
314 if (!req_passed_in) {
315 size[0] = sizeof(*reply);
316 req->rq_replen = lustre_msg_size(1 + (lvb_len > 0), size);
318 lock->l_conn_export = exp;
319 lock->l_export = NULL;
320 lock->l_blocking_ast = blocking;
322 LDLM_DEBUG(lock, "sending request");
323 rc = ptlrpc_queue_wait(req);
325 if (rc != ELDLM_OK) {
327 LDLM_DEBUG(lock, "client-side enqueue END (%s)",
328 rc == ELDLM_LOCK_ABORTED ? "ABORTED" : "FAILED");
329 if (rc == ELDLM_LOCK_ABORTED) {
330 /* Before we return, swab the reply */
331 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
332 lustre_swab_ldlm_reply);
334 CERROR("Can't unpack ldlm_reply\n");
339 tmplvb = lustre_swab_repbuf(req, 1, lvb_len,
342 GOTO(cleanup, rc = -EPROTO);
344 memcpy(lvb, tmplvb, lvb_len);
350 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
351 lustre_swab_ldlm_reply);
353 CERROR("Can't unpack ldlm_reply\n");
354 GOTO(cleanup, rc = -EPROTO);
357 /* lock enqueued on the server */
360 do_gettimeofday(&lock->l_enqueued_time);
361 memcpy(&lock->l_remote_handle, &reply->lock_handle,
362 sizeof(lock->l_remote_handle));
363 *flags = reply->lock_flags;
365 CDEBUG(D_INFO, "local: %p, remote cookie: "LPX64", flags: 0x%x\n",
366 lock, reply->lock_handle.cookie, *flags);
368 /* If enqueue returned a blocked lock but the completion handler has
369 * already run, then it fixed up the resource and we don't need to do it
371 if ((*flags) & LDLM_FL_LOCK_CHANGED) {
372 int newmode = reply->lock_desc.l_req_mode;
374 if (newmode && newmode != lock->l_req_mode) {
375 LDLM_DEBUG(lock, "server returned different mode %s",
376 ldlm_lockname[newmode]);
377 lock->l_req_mode = newmode;
380 if (reply->lock_desc.l_resource.lr_name.name[0] !=
381 lock->l_resource->lr_name.name[0] ||
382 reply->lock_desc.l_resource.lr_name.name[1] !=
383 lock->l_resource->lr_name.name[1]) {
384 CDEBUG(D_INFO, "remote intent success, locking %ld "
386 (long)reply->lock_desc.l_resource.lr_name.name[0],
387 (long)lock->l_resource->lr_name.name[0]);
389 ldlm_lock_change_resource(ns, lock,
390 reply->lock_desc.l_resource.lr_name);
391 if (lock->l_resource == NULL) {
393 GOTO(cleanup, rc = -ENOMEM);
395 LDLM_DEBUG(lock, "client-side enqueue, new resource");
398 memcpy(&lock->l_policy_data,
399 &reply->lock_desc.l_policy_data,
400 sizeof(reply->lock_desc.l_policy_data));
401 if (type != LDLM_PLAIN)
402 LDLM_DEBUG(lock,"client-side enqueue, new policy data");
405 if ((*flags) & LDLM_FL_AST_SENT) {
406 lock_res_and_lock(lock);
407 lock->l_flags |= LDLM_FL_CBPENDING;
408 unlock_res_and_lock(lock);
409 LDLM_DEBUG(lock, "enqueue reply includes blocking AST");
412 /* If the lock has already been granted by a completion AST, don't
413 * clobber the LVB with an older one. */
414 if (lvb_len && (lock->l_req_mode != lock->l_granted_mode)) {
416 tmplvb = lustre_swab_repbuf(req, 1, lvb_len, lvb_swabber);
417 if (tmplvb == NULL) {
419 GOTO(cleanup, rc = -EPROTO);
421 memcpy(lock->l_lvb_data, tmplvb, lvb_len);
425 rc = ldlm_lock_enqueue(ns, &lock, NULL, flags);
426 if (lock->l_completion_ast != NULL) {
427 /* since the lock made it to the server at this point
428 * it's the completion AST's responsibilty to cleanup
429 * the lock if the completion processing fails since
430 * it's no longer a simple local lock cancel. */
431 int err = lock->l_completion_ast(lock, *flags, NULL);
437 if (lvb_len && lvb != NULL) {
438 /* Copy the LVB here, and not earlier, because the completion
439 * AST (if any) can override what we got in the reply */
440 memcpy(lvb, lock->l_lvb_data, lvb_len);
443 LDLM_DEBUG(lock, "client-side enqueue END");
446 switch (cleanup_phase) {
449 failed_lock_cleanup(ns, lock, lockh, mode);
451 if (!req_passed_in && req != NULL)
452 ptlrpc_req_finished(req);
459 static int ldlm_cli_convert_local(struct ldlm_lock *lock, int new_mode,
462 struct ldlm_resource *res;
465 if (lock->l_resource->lr_namespace->ns_client) {
466 CERROR("Trying to cancel local lock\n");
469 LDLM_DEBUG(lock, "client-side local convert");
471 res = ldlm_lock_convert(lock, new_mode, flags);
473 ldlm_reprocess_all(res);
478 LDLM_DEBUG(lock, "client-side local convert handler END");
483 /* FIXME: one of ldlm_cli_convert or the server side should reject attempted
484 * conversion of locks which are on the waiting or converting queue */
485 /* Caller of this code is supposed to take care of lock readers/writers
487 int ldlm_cli_convert(struct lustre_handle *lockh, int new_mode, int *flags)
489 struct ldlm_request *body;
490 struct ldlm_reply *reply;
491 struct ldlm_lock *lock;
492 struct ldlm_resource *res;
493 struct ptlrpc_request *req = NULL;
494 int rc, size = sizeof(*body);
497 lock = ldlm_handle2lock(lockh);
504 if (lock->l_conn_export == NULL)
505 RETURN(ldlm_cli_convert_local(lock, new_mode, flags));
507 LDLM_DEBUG(lock, "client-side convert");
509 req = ptlrpc_prep_req(class_exp2cliimp(lock->l_conn_export),
510 LUSTRE_DLM_VERSION, LDLM_CONVERT, 1, &size, NULL);
512 GOTO(out, rc = -ENOMEM);
514 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
515 memcpy(&body->lock_handle1, &lock->l_remote_handle,
516 sizeof(body->lock_handle1));
518 body->lock_desc.l_req_mode = new_mode;
519 body->lock_flags = *flags;
521 size = sizeof(*reply);
522 req->rq_replen = lustre_msg_size(1, &size);
524 rc = ptlrpc_queue_wait(req);
528 reply = lustre_swab_repbuf(req, 0, sizeof (*reply),
529 lustre_swab_ldlm_reply);
531 CERROR ("Can't unpack ldlm_reply\n");
532 GOTO (out, rc = -EPROTO);
536 GOTO(out, rc = req->rq_status);
538 res = ldlm_lock_convert(lock, new_mode,
539 (int *)&reply->lock_flags);
541 ldlm_reprocess_all(res);
542 /* Go to sleep until the lock is granted. */
543 /* FIXME: or cancelled. */
544 if (lock->l_completion_ast) {
545 rc = lock->l_completion_ast(lock, LDLM_FL_WAIT_NOREPROC,
556 ptlrpc_req_finished(req);
560 int ldlm_cli_cancel(struct lustre_handle *lockh)
562 struct ptlrpc_request *req;
563 struct ldlm_lock *lock;
564 struct ldlm_request *body;
565 int rc = 0, size = sizeof(*body);
568 /* concurrent cancels on the same handle can happen */
569 lock = __ldlm_handle2lock(lockh, LDLM_FL_CANCELING);
573 if (lock->l_conn_export) {
575 struct obd_import *imp;
577 LDLM_DEBUG(lock, "client-side cancel");
578 /* Set this flag to prevent others from getting new references*/
579 lock_res_and_lock(lock);
580 lock->l_flags |= LDLM_FL_CBPENDING;
581 local_only = lock->l_flags & LDLM_FL_LOCAL_ONLY;
582 ldlm_cancel_callback(lock);
583 unlock_res_and_lock(lock);
586 CDEBUG(D_INFO, "not sending request (at caller's "
592 imp = class_exp2cliimp(lock->l_conn_export);
593 if (imp == NULL || imp->imp_invalid) {
594 CDEBUG(D_HA, "skipping cancel on invalid import %p\n",
599 req = ptlrpc_prep_req(imp, LUSTRE_DLM_VERSION, LDLM_CANCEL,
602 GOTO(out, rc = -ENOMEM);
603 req->rq_no_resend = 1;
605 /* XXX FIXME bug 249 */
606 req->rq_request_portal = LDLM_CANCEL_REQUEST_PORTAL;
607 req->rq_reply_portal = LDLM_CANCEL_REPLY_PORTAL;
609 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
610 memcpy(&body->lock_handle1, &lock->l_remote_handle,
611 sizeof(body->lock_handle1));
613 req->rq_replen = lustre_msg_size(0, NULL);
615 rc = ptlrpc_queue_wait(req);
618 char str[PTL_NALFMT_SIZE];
619 CERROR("client/server (nid %s) out of sync"
621 ptlrpc_peernid2str(&req->rq_import->
622 imp_connection->c_peer, str));
623 } else if (rc == -ETIMEDOUT) {
624 ptlrpc_req_finished(req);
626 } else if (rc != ELDLM_OK) {
627 CERROR("Got rc %d from cancel RPC: canceling "
631 ptlrpc_req_finished(req);
633 ldlm_lock_cancel(lock);
635 if (lock->l_resource->lr_namespace->ns_client) {
636 LDLM_ERROR(lock, "Trying to cancel local lock\n");
639 LDLM_DEBUG(lock, "client-side local cancel");
640 ldlm_lock_cancel(lock);
641 ldlm_reprocess_all(lock->l_resource);
642 LDLM_DEBUG(lock, "client-side local cancel handler END");
651 /* when called with LDLM_ASYNC the blocking callback will be handled
652 * in a thread and this function will return after the thread has been
653 * asked to call the callback. when called with LDLM_SYNC the blocking
654 * callback will be performed in this function. */
655 int ldlm_cancel_lru(struct ldlm_namespace *ns, ldlm_sync_t sync)
657 struct ldlm_lock *lock, *next;
663 sync = LDLM_SYNC; /* force to be sync in user space */
666 spin_lock(&ns->ns_unused_lock);
667 count = ns->ns_nr_unused - ns->ns_max_unused;
670 spin_unlock(&ns->ns_unused_lock);
674 while (!list_empty(&ns->ns_unused_list)) {
675 struct list_head *tmp = ns->ns_unused_list.next;
676 lock = list_entry(tmp, struct ldlm_lock, l_lru);
677 LASSERT(!lock->l_readers && !lock->l_writers);
679 LDLM_LOCK_GET(lock); /* dropped by bl thread */
680 spin_unlock(&ns->ns_unused_lock);
682 lock_res_and_lock(lock);
683 ldlm_lock_remove_from_lru(lock);
685 /* Setting the CBPENDING flag is a little misleading, but
686 * prevents an important race; namely, once CBPENDING is set,
687 * the lock can accumulate no more readers/writers. Since
688 * readers and writers are already zero here, ldlm_lock_decref
689 * won't see this flag and call l_blocking_ast */
690 lock->l_flags |= LDLM_FL_CBPENDING;
692 /* We can't re-add to l_lru as it confuses the refcounting in
693 * ldlm_lock_remove_from_lru() if an AST arrives after we drop
694 * ns_lock below. We use l_tmp and can't use l_pending_chain as
695 * it is used both on server and client nevertheles bug 5666
696 * says it is used only on server. --umka */
697 if (sync != LDLM_ASYNC || ldlm_bl_to_thread(ns, NULL, lock))
698 list_add(&lock->l_tmp, &cblist);
700 unlock_res_and_lock(lock);
702 spin_lock(&ns->ns_unused_lock);
707 spin_unlock(&ns->ns_unused_lock);
709 list_for_each_entry_safe(lock, next, &cblist, l_tmp) {
710 list_del_init(&lock->l_tmp);
711 ldlm_handle_bl_callback(ns, NULL, lock);
717 static int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
718 struct ldlm_res_id res_id, int flags,
721 struct list_head *tmp, *next, list = LIST_HEAD_INIT(list);
722 struct ldlm_resource *res;
723 struct ldlm_lock *lock;
726 res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
728 /* This is not a problem. */
729 CDEBUG(D_INFO, "No resource "LPU64"\n", res_id.name[0]);
734 list_for_each(tmp, &res->lr_granted) {
735 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
737 if (opaque != NULL && lock->l_ast_data != opaque) {
738 LDLM_ERROR(lock, "data %p doesn't match opaque %p",
739 lock->l_ast_data, opaque);
743 if (lock->l_readers || lock->l_writers) {
744 if (flags & LDLM_FL_CONFIG_CHANGE)
745 lock->l_flags |= LDLM_FL_CBPENDING;
746 else if (flags & LDLM_FL_WARN)
747 LDLM_ERROR(lock, "lock in use");
751 /* See CBPENDING comment in ldlm_cancel_lru */
752 lock->l_flags |= LDLM_FL_CBPENDING;
754 LASSERT(list_empty(&lock->l_bl_ast));
755 list_add(&lock->l_bl_ast, &list);
760 list_for_each_safe(tmp, next, &list) {
761 struct lustre_handle lockh;
763 lock = list_entry(tmp, struct ldlm_lock, l_bl_ast);
765 if (flags & LDLM_FL_LOCAL_ONLY) {
766 ldlm_lock_cancel(lock);
768 ldlm_lock2handle(lock, &lockh);
769 rc = ldlm_cli_cancel(&lockh);
771 CERROR("ldlm_cli_cancel: %d\n", rc);
773 list_del_init(&lock->l_bl_ast);
777 ldlm_resource_putref(res);
782 static inline int have_no_nsresource(struct ldlm_namespace *ns)
786 spin_lock(&ns->ns_hash_lock);
787 if (ns->ns_resources == 0)
789 spin_unlock(&ns->ns_hash_lock);
794 /* Cancel all locks on a namespace (or a specific resource, if given)
795 * that have 0 readers/writers.
797 * If flags & LDLM_FL_LOCAL_ONLY, throw the locks away without trying
798 * to notify the server.
799 * If flags & LDLM_FL_NO_CALLBACK, don't run the cancel callback.
800 * If flags & LDLM_FL_WARN, print a warning if some locks are still in use.
801 * If flags & LDLM_FL_CONFIG_CHANGE, mark all locks as having a pending callback
803 int ldlm_cli_cancel_unused(struct ldlm_namespace *ns,
804 struct ldlm_res_id *res_id, int flags, void *opaque)
807 struct l_wait_info lwi = { 0 };
814 RETURN(ldlm_cli_cancel_unused_resource(ns, *res_id, flags,
817 spin_lock(&ns->ns_hash_lock);
818 for (i = 0; i < RES_HASH_SIZE; i++) {
819 struct list_head *tmp;
820 tmp = ns->ns_hash[i].next;
821 while (tmp != &(ns->ns_hash[i])) {
822 struct ldlm_resource *res;
825 res = list_entry(tmp, struct ldlm_resource, lr_hash);
826 ldlm_resource_getref(res);
827 spin_unlock(&ns->ns_hash_lock);
829 rc = ldlm_cli_cancel_unused_resource(ns, res->lr_name,
832 CERROR("cancel_unused_res ("LPU64"): %d\n",
833 res->lr_name.name[0], rc);
835 spin_lock(&ns->ns_hash_lock);
837 ldlm_resource_putref_locked(res);
840 spin_unlock(&ns->ns_hash_lock);
842 if (flags & LDLM_FL_CONFIG_CHANGE)
843 l_wait_event(ns->ns_waitq, have_no_nsresource(ns), &lwi);
848 /* Lock iterators. */
850 int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
853 struct list_head *tmp, *next;
854 struct ldlm_lock *lock;
855 int rc = LDLM_ITER_CONTINUE;
860 RETURN(LDLM_ITER_CONTINUE);
863 list_for_each_safe(tmp, next, &res->lr_granted) {
864 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
866 if (iter(lock, closure) == LDLM_ITER_STOP)
867 GOTO(out, rc = LDLM_ITER_STOP);
870 list_for_each_safe(tmp, next, &res->lr_converting) {
871 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
873 if (iter(lock, closure) == LDLM_ITER_STOP)
874 GOTO(out, rc = LDLM_ITER_STOP);
877 list_for_each_safe(tmp, next, &res->lr_waiting) {
878 lock = list_entry(tmp, struct ldlm_lock, l_res_link);
880 if (iter(lock, closure) == LDLM_ITER_STOP)
881 GOTO(out, rc = LDLM_ITER_STOP);
888 struct iter_helper_data {
889 ldlm_iterator_t iter;
893 static int ldlm_iter_helper(struct ldlm_lock *lock, void *closure)
895 struct iter_helper_data *helper = closure;
896 return helper->iter(lock, helper->closure);
899 static int ldlm_res_iter_helper(struct ldlm_resource *res, void *closure)
901 return ldlm_resource_foreach(res, ldlm_iter_helper, closure);
904 int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
907 struct iter_helper_data helper = { iter: iter, closure: closure };
908 return ldlm_namespace_foreach_res(ns, ldlm_res_iter_helper, &helper);
911 int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
912 ldlm_res_iterator_t iter, void *closure)
914 int i, rc = LDLM_ITER_CONTINUE;
915 struct ldlm_resource *res;
916 struct list_head *tmp;
918 spin_lock(&ns->ns_hash_lock);
919 for (i = 0; i < RES_HASH_SIZE; i++) {
920 tmp = ns->ns_hash[i].next;
921 while (tmp != &(ns->ns_hash[i])) {
922 res = list_entry(tmp, struct ldlm_resource, lr_hash);
923 ldlm_resource_getref(res);
924 spin_unlock(&ns->ns_hash_lock);
926 rc = iter(res, closure);
928 spin_lock(&ns->ns_hash_lock);
930 ldlm_resource_putref_locked(res);
931 if (rc == LDLM_ITER_STOP)
936 spin_unlock(&ns->ns_hash_lock);
940 /* non-blocking function to manipulate a lock whose cb_data is being put away.*/
941 void ldlm_change_cbdata(struct ldlm_namespace *ns,
942 struct ldlm_res_id *res_id,
943 ldlm_iterator_t iter,
946 struct ldlm_resource *res;
950 CERROR("must pass in namespace\n");
954 res = ldlm_resource_get(ns, NULL, *res_id, 0, 0);
960 ldlm_resource_foreach(res, iter, data);
961 ldlm_resource_putref(res);
967 static int ldlm_chain_lock_for_replay(struct ldlm_lock *lock, void *closure)
969 struct list_head *list = closure;
971 /* we use l_pending_chain here, because it's unused on clients. */
972 list_add(&lock->l_pending_chain, list);
973 return LDLM_ITER_CONTINUE;
976 static int replay_lock_interpret(struct ptlrpc_request *req,
979 struct ldlm_lock *lock;
980 struct ldlm_reply *reply;
982 atomic_dec(&req->rq_import->imp_replay_inflight);
986 lock = req->rq_async_args.pointer_arg[0];
987 LASSERT(lock != NULL);
989 reply = lustre_swab_repbuf(req, 0, sizeof (*reply),
990 lustre_swab_ldlm_reply);
992 CERROR("Can't unpack ldlm_reply\n");
993 GOTO (out, rc = -EPROTO);
996 memcpy(&lock->l_remote_handle, &reply->lock_handle,
997 sizeof(lock->l_remote_handle));
998 LDLM_DEBUG(lock, "replayed lock:");
999 ptlrpc_import_recovery_state_machine(req->rq_import);
1002 ptlrpc_connect_import(req->rq_import, NULL);
1007 static int replay_one_lock(struct obd_import *imp, struct ldlm_lock *lock)
1009 struct ptlrpc_request *req;
1010 struct ldlm_request *body;
1011 struct ldlm_reply *reply;
1013 int size[2] = {0, sizeof(*body)};
1017 * If granted mode matches the requested mode, this lock is granted.
1019 * If they differ, but we have a granted mode, then we were granted
1020 * one mode and now want another: ergo, converting.
1022 * If we haven't been granted anything and are on a resource list,
1023 * then we're blocked/waiting.
1025 * If we haven't been granted anything and we're NOT on a resource list,
1026 * then we haven't got a reply yet and don't have a known disposition.
1027 * This happens whenever a lock enqueue is the request that triggers
1030 if (lock->l_granted_mode == lock->l_req_mode)
1031 flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_GRANTED;
1032 else if (lock->l_granted_mode)
1033 flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_CONV;
1034 else if (!list_empty(&lock->l_res_link))
1035 flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_WAIT;
1037 flags = LDLM_FL_REPLAY;
1039 req = ptlrpc_prep_req(imp, LUSTRE_DLM_VERSION, LDLM_ENQUEUE,
1044 /* We're part of recovery, so don't wait for it. */
1045 req->rq_send_state = LUSTRE_IMP_REPLAY_LOCKS;
1047 body = lustre_msg_buf(req->rq_reqmsg, 1, sizeof (*body));
1048 ldlm_lock2desc(lock, &body->lock_desc);
1049 body->lock_flags = flags;
1051 ldlm_lock2handle(lock, &body->lock_handle1);
1052 size[0] = sizeof(*reply);
1053 if (lock->l_lvb_len != 0) {
1055 size[1] = lock->l_lvb_len;
1057 req->rq_replen = lustre_msg_size(buffers, size);
1058 /* notify the server we've replayed all requests.
1059 * also, we mark the request to be put on a dedicated
1060 * queue to be processed after all request replayes.
1062 lustre_msg_set_flags(req->rq_reqmsg, MSG_REQ_REPLAY_DONE);
1064 LDLM_DEBUG(lock, "replaying lock:");
1066 imp->imp_locks_replayed++;
1067 atomic_inc(&req->rq_import->imp_replay_inflight);
1068 req->rq_async_args.pointer_arg[0] = lock;
1069 req->rq_interpret_reply = replay_lock_interpret;
1070 ptlrpcd_add_req(req);
1075 int ldlm_replay_locks(struct obd_import *imp)
1077 struct ldlm_namespace *ns = imp->imp_obd->obd_namespace;
1078 struct list_head list, *pos, *next;
1079 struct ldlm_lock *lock;
1083 INIT_LIST_HEAD(&list);
1085 LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
1086 LASSERT(ns != NULL);
1088 /* ensure this doesn't fall to 0 before all have been queued */
1089 atomic_inc(&imp->imp_replay_inflight);
1091 (void)ldlm_namespace_foreach(ns, ldlm_chain_lock_for_replay, &list);
1093 list_for_each_safe(pos, next, &list) {
1094 lock = list_entry(pos, struct ldlm_lock, l_pending_chain);
1095 rc = replay_one_lock(imp, lock);
1097 break; /* or try to do the rest? */
1100 atomic_dec(&imp->imp_replay_inflight);