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.
5 * Author: Peter Braam <braam@clusterfs.com>
6 * Author: Phil Schwan <phil@clusterfs.com>
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 # define EXPORT_SYMTAB
27 #define DEBUG_SUBSYSTEM S_LDLM
30 # include <linux/module.h>
31 # include <linux/slab.h>
32 # include <linux/init.h>
33 # include <linux/wait.h>
35 # include <liblustre.h>
38 #include <linux/lustre_dlm.h>
39 #include <linux/obd_class.h>
40 #include <libcfs/list.h>
41 #include "ldlm_internal.h"
43 extern kmem_cache_t *ldlm_resource_slab;
44 extern kmem_cache_t *ldlm_lock_slab;
45 extern struct lustre_lock ldlm_handle_lock;
46 extern struct list_head ldlm_namespace_list;
48 static DECLARE_MUTEX(ldlm_ref_sem);
49 static int ldlm_refcount;
52 static struct ldlm_state *ldlm_state;
54 inline unsigned long round_timeout(unsigned long timeout)
56 return ((timeout / HZ) + 1) * HZ;
60 /* XXX should this be per-ldlm? */
61 static struct list_head waiting_locks_list;
62 static spinlock_t waiting_locks_spinlock;
63 static struct timer_list waiting_locks_timer;
65 static struct expired_lock_thread {
66 wait_queue_head_t elt_waitq;
68 struct list_head elt_expired_locks;
70 } expired_lock_thread;
73 #if !defined(ENOTSUPP)
79 #define ELT_TERMINATE 2
83 struct list_head blp_list;
84 wait_queue_head_t blp_waitq;
85 atomic_t blp_num_threads;
86 struct completion blp_comp;
89 struct ldlm_bl_work_item {
90 struct list_head blwi_entry;
91 struct ldlm_namespace *blwi_ns;
92 struct ldlm_lock_desc blwi_ld;
93 struct ldlm_lock *blwi_lock;
98 static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
100 static inline int have_expired_locks(void)
104 spin_lock_bh(&expired_lock_thread.elt_lock);
105 need_to_run = !list_empty(&expired_lock_thread.elt_expired_locks);
106 spin_unlock_bh(&expired_lock_thread.elt_lock);
111 static int expired_lock_main(void *arg)
113 struct list_head *expired = &expired_lock_thread.elt_expired_locks;
114 struct l_wait_info lwi = { 0 };
119 kportal_daemonize("ldlm_elt");
121 SIGNAL_MASK_LOCK(current, flags);
122 sigfillset(¤t->blocked);
124 SIGNAL_MASK_UNLOCK(current, flags);
128 expired_lock_thread.elt_state = ELT_READY;
129 wake_up(&expired_lock_thread.elt_waitq);
132 l_wait_event(expired_lock_thread.elt_waitq,
133 have_expired_locks() ||
134 expired_lock_thread.elt_state == ELT_TERMINATE,
137 spin_lock_bh(&expired_lock_thread.elt_lock);
138 while (!list_empty(expired)) {
139 struct obd_export *export;
140 struct ldlm_lock *lock;
142 lock = list_entry(expired->next, struct ldlm_lock,
144 if ((void *)lock < LP_POISON + PAGE_SIZE &&
145 (void *)lock >= LP_POISON) {
146 CERROR("free lock on elt list %p\n", lock);
149 list_del_init(&lock->l_pending_chain);
150 if ((void *)lock->l_export < LP_POISON + PAGE_SIZE &&
151 (void *)lock->l_export >= LP_POISON + PAGE_SIZE) {
152 CERROR("lock with free export on elt list %p\n",
154 lock->l_export = NULL;
155 LDLM_ERROR(lock, "free export\n");
158 export = class_export_get(lock->l_export);
159 spin_unlock_bh(&expired_lock_thread.elt_lock);
161 ptlrpc_fail_export(export);
162 class_export_put(export);
163 spin_lock_bh(&expired_lock_thread.elt_lock);
165 spin_unlock_bh(&expired_lock_thread.elt_lock);
167 if (expired_lock_thread.elt_state == ELT_TERMINATE)
171 expired_lock_thread.elt_state = ELT_STOPPED;
172 wake_up(&expired_lock_thread.elt_waitq);
176 static void waiting_locks_callback(unsigned long unused)
178 struct ldlm_lock *lock;
179 char str[PTL_NALFMT_SIZE];
181 if (obd_dump_on_timeout)
182 portals_debug_dumplog();
185 spin_lock_bh(&waiting_locks_spinlock);
186 while (!list_empty(&waiting_locks_list)) {
187 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
190 if ((lock->l_callback_timeout > jiffies) ||
191 (lock->l_req_mode == LCK_GROUP))
194 if (ptlrpc_check_suspend()) {
195 /* there is a case when we talk to one mds, holding
196 * lock from another mds. this way we easily can get
197 * here, if second mds is being recovered. so, we
198 * suspend timeouts. bug 6019 */
200 LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
201 lock->l_export->exp_client_uuid.uuid,
202 lock->l_export->exp_connection->c_remote_uuid.uuid,
203 ptlrpc_peernid2str(&lock->l_export->exp_connection->c_peer, str));
205 list_del_init(&lock->l_pending_chain);
206 spin_unlock_bh(&waiting_locks_spinlock);
207 ldlm_add_waiting_lock(lock);
212 LDLM_ERROR(lock, "lock callback timer expired: evicting client "
214 lock->l_export->exp_client_uuid.uuid,
215 lock->l_export->exp_connection->c_remote_uuid.uuid,
216 ptlrpc_peernid2str(&lock->l_export->exp_connection->c_peer, str));
218 spin_lock_bh(&expired_lock_thread.elt_lock);
219 list_del(&lock->l_pending_chain);
220 list_add(&lock->l_pending_chain,
221 &expired_lock_thread.elt_expired_locks);
222 spin_unlock_bh(&expired_lock_thread.elt_lock);
223 wake_up(&expired_lock_thread.elt_waitq);
227 * Make sure the timer will fire again if we have any locks
230 if (!list_empty(&waiting_locks_list)) {
231 unsigned long timeout_rounded;
232 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
234 timeout_rounded = round_timeout(lock->l_callback_timeout);
235 mod_timer(&waiting_locks_timer, timeout_rounded);
237 spin_unlock_bh(&waiting_locks_spinlock);
241 * Indicate that we're waiting for a client to call us back cancelling a given
242 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
243 * timer to fire appropriately. (We round up to the next second, to avoid
244 * floods of timer firings during periods of high lock contention and traffic).
246 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
248 unsigned long timeout_rounded;
250 spin_lock_bh(&waiting_locks_spinlock);
251 if (!list_empty(&lock->l_pending_chain)) {
252 LDLM_DEBUG(lock, "not re-adding to wait list");
253 spin_unlock_bh(&waiting_locks_spinlock);
256 LDLM_DEBUG(lock, "adding to wait list");
258 lock->l_callback_timeout = jiffies + (obd_timeout * HZ / 2);
260 timeout_rounded = round_timeout(lock->l_callback_timeout);
262 if (timeout_rounded < waiting_locks_timer.expires ||
263 !timer_pending(&waiting_locks_timer)) {
264 mod_timer(&waiting_locks_timer, timeout_rounded);
266 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
267 spin_unlock_bh(&waiting_locks_spinlock);
272 * Remove a lock from the pending list, likely because it had its cancellation
273 * callback arrive without incident. This adjusts the lock-timeout timer if
274 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
276 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
278 struct list_head *list_next;
280 if (lock->l_export == NULL) {
281 /* We don't have a "waiting locks list" on clients. */
282 LDLM_DEBUG(lock, "client lock: no-op");
286 spin_lock_bh(&waiting_locks_spinlock);
288 if (list_empty(&lock->l_pending_chain)) {
289 spin_unlock_bh(&waiting_locks_spinlock);
290 LDLM_DEBUG(lock, "wasn't waiting");
294 list_next = lock->l_pending_chain.next;
295 if (lock->l_pending_chain.prev == &waiting_locks_list) {
296 /* Removing the head of the list, adjust timer. */
297 if (list_next == &waiting_locks_list) {
298 /* No more, just cancel. */
299 del_timer(&waiting_locks_timer);
301 struct ldlm_lock *next;
302 next = list_entry(list_next, struct ldlm_lock,
304 mod_timer(&waiting_locks_timer,
305 round_timeout(next->l_callback_timeout));
309 spin_lock_bh(&expired_lock_thread.elt_lock);
310 list_del_init(&lock->l_pending_chain);
311 spin_unlock_bh(&expired_lock_thread.elt_lock);
313 spin_unlock_bh(&waiting_locks_spinlock);
314 LDLM_DEBUG(lock, "removed");
318 #else /* !__KERNEL__ */
320 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
325 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
330 #endif /* __KERNEL__ */
332 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,const char *ast_type)
334 struct ptlrpc_connection *conn = lock->l_export->exp_connection;
335 char str[PTL_NALFMT_SIZE];
337 LDLM_ERROR(lock, "%s AST failed (%d): evicting client %s@%s NID "LPX64
338 " (%s)", ast_type, rc, lock->l_export->exp_client_uuid.uuid,
339 conn->c_remote_uuid.uuid, conn->c_peer.peer_id.nid,
340 ptlrpc_peernid2str(&conn->c_peer, str));
342 if (obd_dump_on_timeout)
343 portals_debug_dumplog();
344 ptlrpc_fail_export(lock->l_export);
347 static int ldlm_handle_ast_error(struct ldlm_lock *lock,
348 struct ptlrpc_request *req, int rc,
349 const char *ast_type)
351 struct ptlrpc_peer *peer = &req->rq_import->imp_connection->c_peer;
352 char str[PTL_NALFMT_SIZE];
354 if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
355 LASSERT(lock->l_export);
356 if (lock->l_export->exp_libclient) {
357 LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
358 " timeout, just cancelling lock", ast_type,
359 ptlrpc_peernid2str(peer, str));
360 ldlm_lock_cancel(lock);
363 l_lock(&lock->l_resource->lr_namespace->ns_lock);
364 ldlm_del_waiting_lock(lock);
365 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
366 ldlm_failed_ast(lock, rc, ast_type);
370 LDLM_DEBUG(lock, "client (nid %s) returned %d"
371 " from %s AST - normal race",
372 ptlrpc_peernid2str(peer, str),
373 req->rq_repmsg->status, ast_type);
375 LDLM_ERROR(lock, "client (nid %s) returned %d "
376 "from %s AST", ptlrpc_peernid2str(peer, str),
377 (req->rq_repmsg != NULL) ?
378 req->rq_repmsg->status : 0, ast_type);
379 ldlm_lock_cancel(lock);
380 /* Server-side AST functions are called from ldlm_reprocess_all,
381 * which needs to be told to please restart its reprocessing. */
388 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
389 struct ldlm_lock_desc *desc,
390 void *data, int flag)
392 struct ldlm_request *body;
393 struct ptlrpc_request *req;
394 int rc = 0, size = sizeof(*body);
397 if (flag == LDLM_CB_CANCELING) {
398 /* Don't need to do anything here. */
402 LASSERTF(lock->l_export->exp_obd->obd_recovering == 0,
403 "BUG 6063: lock collide during recovery");
407 l_lock(&lock->l_resource->lr_namespace->ns_lock);
408 if (lock->l_granted_mode != lock->l_req_mode) {
409 /* this blocking AST will be communicated as part of the
410 * completion AST instead */
411 LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
412 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
416 if (lock->l_destroyed) {
417 /* What's the point? */
418 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
423 if (LTIME_S(CURRENT_TIME) - lock->l_export->exp_last_request_time > 30){
424 ldlm_failed_ast(lock, -ETIMEDOUT, "Not-attempted blocking");
425 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
430 req = ptlrpc_prep_req(lock->l_export->exp_imp_reverse,
431 LUSTRE_DLM_VERSION, LDLM_BL_CALLBACK,
434 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
438 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
439 memcpy(&body->lock_handle1, &lock->l_remote_handle,
440 sizeof(body->lock_handle1));
441 memcpy(&body->lock_desc, desc, sizeof(*desc));
442 body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
444 LDLM_DEBUG(lock, "server preparing blocking AST");
445 req->rq_replen = lustre_msg_size(0, NULL);
447 if (lock->l_granted_mode == lock->l_req_mode)
448 ldlm_add_waiting_lock(lock);
449 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
451 req->rq_send_state = LUSTRE_IMP_FULL;
452 req->rq_timeout = ldlm_timeout; /* timeout for initial AST reply */
453 rc = ptlrpc_queue_wait(req);
455 rc = ldlm_handle_ast_error(lock, req, rc, "blocking");
457 ptlrpc_req_finished(req);
462 /* XXX copied from ptlrpc/service.c */
463 static long timeval_sub(struct timeval *large, struct timeval *small)
465 return (large->tv_sec - small->tv_sec) * 1000000 +
466 (large->tv_usec - small->tv_usec);
469 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
471 struct ldlm_request *body;
472 struct ptlrpc_request *req;
473 struct timeval granted_time;
474 long total_enqueue_wait;
475 int rc = 0, size[2] = {sizeof(*body)}, buffers = 1;
478 LASSERT(lock != NULL);
480 do_gettimeofday(&granted_time);
481 total_enqueue_wait = timeval_sub(&granted_time, &lock->l_enqueued_time);
483 if (total_enqueue_wait / 1000000 > obd_timeout)
484 LDLM_ERROR(lock, "enqueue wait took %ldus", total_enqueue_wait);
486 down(&lock->l_resource->lr_lvb_sem);
487 if (lock->l_resource->lr_lvb_len) {
489 size[1] = lock->l_resource->lr_lvb_len;
491 up(&lock->l_resource->lr_lvb_sem);
493 req = ptlrpc_prep_req(lock->l_export->exp_imp_reverse,
494 LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK,
495 buffers, size, NULL);
499 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
500 memcpy(&body->lock_handle1, &lock->l_remote_handle,
501 sizeof(body->lock_handle1));
502 body->lock_flags = flags;
503 ldlm_lock2desc(lock, &body->lock_desc);
508 down(&lock->l_resource->lr_lvb_sem);
509 lvb = lustre_msg_buf(req->rq_reqmsg, 1,
510 lock->l_resource->lr_lvb_len);
512 memcpy(lvb, lock->l_resource->lr_lvb_data,
513 lock->l_resource->lr_lvb_len);
514 up(&lock->l_resource->lr_lvb_sem);
517 LDLM_DEBUG(lock, "server preparing completion AST (after %ldus wait)",
519 req->rq_replen = lustre_msg_size(0, NULL);
521 req->rq_send_state = LUSTRE_IMP_FULL;
522 req->rq_timeout = ldlm_timeout; /* timeout for initial AST reply */
524 /* We only send real blocking ASTs after the lock is granted */
525 l_lock(&lock->l_resource->lr_namespace->ns_lock);
526 if (lock->l_flags & LDLM_FL_AST_SENT) {
527 body->lock_flags |= LDLM_FL_AST_SENT;
528 ldlm_add_waiting_lock(lock); /* start the lock-timeout clock */
530 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
532 rc = ptlrpc_queue_wait(req);
534 rc = ldlm_handle_ast_error(lock, req, rc, "completion");
536 ptlrpc_req_finished(req);
541 int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
543 struct ldlm_resource *res = lock->l_resource;
544 struct ldlm_request *body;
545 struct ptlrpc_request *req;
546 int rc = 0, size = sizeof(*body);
549 LASSERT(lock != NULL);
551 req = ptlrpc_prep_req(lock->l_export->exp_imp_reverse,
552 LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK,
557 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
558 memcpy(&body->lock_handle1, &lock->l_remote_handle,
559 sizeof(body->lock_handle1));
560 ldlm_lock2desc(lock, &body->lock_desc);
562 down(&lock->l_resource->lr_lvb_sem);
563 size = lock->l_resource->lr_lvb_len;
564 up(&lock->l_resource->lr_lvb_sem);
565 req->rq_replen = lustre_msg_size(1, &size);
567 req->rq_send_state = LUSTRE_IMP_FULL;
568 req->rq_timeout = 2; /* 2 second timeout for initial AST reply */
570 rc = ptlrpc_queue_wait(req);
571 if (rc == -ELDLM_NO_LOCK_DATA)
572 LDLM_DEBUG(lock, "lost race - client has a lock but no inode");
574 rc = ldlm_handle_ast_error(lock, req, rc, "glimpse");
576 rc = res->lr_namespace->ns_lvbo->lvbo_update
577 (res, req->rq_repmsg, 0, 1);
578 ptlrpc_req_finished(req);
582 static struct ldlm_lock *
583 find_existing_lock(struct obd_export *exp, struct lustre_handle *remote_hdl)
585 struct obd_device *obd = exp->exp_obd;
586 struct list_head *iter;
588 l_lock(&obd->obd_namespace->ns_lock);
589 list_for_each(iter, &exp->exp_ldlm_data.led_held_locks) {
590 struct ldlm_lock *lock;
591 lock = list_entry(iter, struct ldlm_lock, l_export_chain);
592 if (lock->l_remote_handle.cookie == remote_hdl->cookie) {
594 l_unlock(&obd->obd_namespace->ns_lock);
598 l_unlock(&obd->obd_namespace->ns_lock);
603 int ldlm_handle_enqueue(struct ptlrpc_request *req,
604 ldlm_completion_callback completion_callback,
605 ldlm_blocking_callback blocking_callback,
606 ldlm_glimpse_callback glimpse_callback)
608 struct obd_device *obddev = req->rq_export->exp_obd;
609 struct ldlm_reply *dlm_rep;
610 struct ldlm_request *dlm_req;
611 int rc = 0, size[2] = {sizeof(*dlm_rep)};
613 ldlm_error_t err = ELDLM_OK;
614 struct ldlm_lock *lock = NULL;
618 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
620 dlm_req = lustre_swab_reqbuf (req, MDS_REQ_INTENT_LOCKREQ_OFF,
622 lustre_swab_ldlm_request);
623 if (dlm_req == NULL) {
624 CERROR ("Can't unpack dlm_req\n");
625 GOTO(out, rc = -EFAULT);
628 flags = dlm_req->lock_flags;
630 LASSERT(req->rq_export);
632 if (flags & LDLM_FL_REPLAY) {
633 lock = find_existing_lock(req->rq_export,
634 &dlm_req->lock_handle1);
636 DEBUG_REQ(D_HA, req, "found existing lock cookie "LPX64,
637 lock->l_handle.h_cookie);
638 GOTO(existing_lock, rc = 0);
642 /* The lock's callback data might be set in the policy function */
643 lock = ldlm_lock_create(obddev->obd_namespace, &dlm_req->lock_handle2,
644 dlm_req->lock_desc.l_resource.lr_name,
645 dlm_req->lock_desc.l_resource.lr_type,
646 dlm_req->lock_desc.l_req_mode,
647 blocking_callback, completion_callback,
648 glimpse_callback, NULL, 0);
650 GOTO(out, rc = -ENOMEM);
652 do_gettimeofday(&lock->l_enqueued_time);
653 memcpy(&lock->l_remote_handle, &dlm_req->lock_handle1,
654 sizeof(lock->l_remote_handle));
655 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
657 LASSERT(req->rq_export);
658 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
659 l_lock(&lock->l_resource->lr_namespace->ns_lock);
660 if (req->rq_export->exp_failed) {
661 LDLM_ERROR(lock,"lock on destroyed export %p\n",req->rq_export);
662 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
663 GOTO(out, err = -ENOTCONN);
665 lock->l_export = class_export_get(req->rq_export);
667 list_add(&lock->l_export_chain,
668 &lock->l_export->exp_ldlm_data.led_held_locks);
669 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
673 if (flags & LDLM_FL_HAS_INTENT) {
674 /* In this case, the reply buffer is allocated deep in
675 * local_lock_enqueue by the policy function. */
679 down(&lock->l_resource->lr_lvb_sem);
680 if (lock->l_resource->lr_lvb_len) {
681 size[1] = lock->l_resource->lr_lvb_len;
684 up(&lock->l_resource->lr_lvb_sem);
685 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
686 GOTO(out, rc = -ENOMEM);
688 rc = lustre_pack_reply(req, buffers, size, NULL);
693 if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
694 memcpy(&lock->l_policy_data, &dlm_req->lock_desc.l_policy_data,
695 sizeof(ldlm_policy_data_t));
696 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
697 memcpy(&lock->l_req_extent, &lock->l_policy_data.l_extent,
698 sizeof(lock->l_req_extent));
700 err = ldlm_lock_enqueue(obddev->obd_namespace, &lock, cookie, &flags);
704 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*dlm_rep));
705 dlm_rep->lock_flags = flags;
707 ldlm_lock2desc(lock, &dlm_rep->lock_desc);
708 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
710 /* We never send a blocking AST until the lock is granted, but
711 * we can tell it right now */
712 l_lock(&lock->l_resource->lr_namespace->ns_lock);
713 if (lock->l_flags & LDLM_FL_AST_SENT) {
714 dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
715 if (lock->l_granted_mode == lock->l_req_mode)
716 ldlm_add_waiting_lock(lock);
718 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
722 req->rq_status = err;
723 if (req->rq_reply_state == NULL) {
724 err = lustre_pack_reply(req, 0, NULL, NULL);
730 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
731 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
733 l_lock(&lock->l_resource->lr_namespace->ns_lock);
734 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
735 "(err=%d, rc=%d)", err, rc);
736 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
739 down(&lock->l_resource->lr_lvb_sem);
740 size[1] = lock->l_resource->lr_lvb_len;
742 void *lvb = lustre_msg_buf(req->rq_repmsg,
744 LASSERTF(lvb != NULL, "req %p, lock %p\n",
747 memcpy(lvb, lock->l_resource->lr_lvb_data,
750 up(&lock->l_resource->lr_lvb_sem);
752 ldlm_lock_destroy(lock);
755 if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
756 ldlm_reprocess_all(lock->l_resource);
759 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p, rc %d)",
765 int ldlm_handle_convert(struct ptlrpc_request *req)
767 struct ldlm_request *dlm_req;
768 struct ldlm_reply *dlm_rep;
769 struct ldlm_lock *lock;
770 int rc, size = sizeof(*dlm_rep);
773 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
774 lustre_swab_ldlm_request);
775 if (dlm_req == NULL) {
776 CERROR ("Can't unpack dlm_req\n");
780 rc = lustre_pack_reply(req, 1, &size, NULL);
782 CERROR("out of memory\n");
785 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*dlm_rep));
786 dlm_rep->lock_flags = dlm_req->lock_flags;
788 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
790 req->rq_status = EINVAL;
794 l_lock(&lock->l_resource->lr_namespace->ns_lock);
795 LDLM_DEBUG(lock, "server-side convert handler START");
796 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
798 res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
799 &dlm_rep->lock_flags);
801 l_lock(&lock->l_resource->lr_namespace->ns_lock);
802 if (ldlm_del_waiting_lock(lock))
803 CDEBUG(D_DLMTRACE, "converted waiting lock %p\n", lock);
804 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
807 req->rq_status = EDEADLOCK;
813 ldlm_reprocess_all(lock->l_resource);
814 l_lock(&lock->l_resource->lr_namespace->ns_lock);
815 LDLM_DEBUG(lock, "server-side convert handler END");
816 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
819 LDLM_DEBUG_NOLOCK("server-side convert handler END");
824 int ldlm_handle_cancel(struct ptlrpc_request *req)
826 struct ldlm_request *dlm_req;
827 struct ldlm_lock *lock;
828 struct ldlm_resource *res;
832 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
833 lustre_swab_ldlm_request);
834 if (dlm_req == NULL) {
835 CERROR("bad request buffer for cancel\n");
839 rc = lustre_pack_reply(req, 0, NULL, NULL);
841 CERROR("out of memory\n");
845 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
847 CERROR("received cancel for unknown lock cookie "LPX64
848 " from client %s id %s\n",
849 dlm_req->lock_handle1.cookie,
850 req->rq_export->exp_client_uuid.uuid,
852 LDLM_DEBUG_NOLOCK("server-side cancel handler stale lock "
854 dlm_req->lock_handle1.cookie);
855 req->rq_status = ESTALE;
857 LDLM_DEBUG(lock, "server-side cancel handler START");
858 res = lock->l_resource;
859 if (res && res->lr_namespace->ns_lvbo &&
860 res->lr_namespace->ns_lvbo->lvbo_update) {
861 (void)res->lr_namespace->ns_lvbo->lvbo_update
863 //(res, req->rq_reqmsg, 1);
866 l_lock(&res->lr_namespace->ns_lock);
867 ldlm_lock_cancel(lock);
868 if (ldlm_del_waiting_lock(lock))
869 CDEBUG(D_DLMTRACE, "cancelled waiting lock %p\n", lock);
870 l_unlock(&res->lr_namespace->ns_lock);
874 if (ptlrpc_reply(req) != 0)
878 ldlm_reprocess_all(lock->l_resource);
879 l_lock(&lock->l_resource->lr_namespace->ns_lock);
880 LDLM_DEBUG(lock, "server-side cancel handler END");
881 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
888 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
889 struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
894 l_lock(&ns->ns_lock);
895 LDLM_DEBUG(lock, "client blocking AST callback handler START");
897 lock->l_flags |= LDLM_FL_CBPENDING;
898 do_ast = (!lock->l_readers && !lock->l_writers);
901 LDLM_DEBUG(lock, "already unused, calling "
902 "callback (%p)", lock->l_blocking_ast);
903 if (lock->l_blocking_ast != NULL) {
904 l_unlock(&ns->ns_lock);
905 l_check_no_ns_lock(ns);
906 lock->l_blocking_ast(lock, ld, lock->l_ast_data,
908 l_lock(&ns->ns_lock);
911 LDLM_DEBUG(lock, "Lock still has references, will be"
915 LDLM_DEBUG(lock, "client blocking callback handler END");
916 l_unlock(&ns->ns_lock);
921 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
922 struct ldlm_namespace *ns,
923 struct ldlm_request *dlm_req,
924 struct ldlm_lock *lock)
929 l_lock(&ns->ns_lock);
930 LDLM_DEBUG(lock, "client completion callback handler START");
932 /* If we receive the completion AST before the actual enqueue returned,
933 * then we might need to switch lock modes, resources, or extents. */
934 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
935 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
936 LDLM_DEBUG(lock, "completion AST, new lock mode");
939 if (lock->l_resource->lr_type != LDLM_PLAIN) {
940 memcpy(&lock->l_policy_data, &dlm_req->lock_desc.l_policy_data,
941 sizeof(lock->l_policy_data));
942 LDLM_DEBUG(lock, "completion AST, new policy data");
945 ldlm_resource_unlink_lock(lock);
946 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
947 &lock->l_resource->lr_name,
948 sizeof(lock->l_resource->lr_name)) != 0) {
949 ldlm_lock_change_resource(ns, lock,
950 dlm_req->lock_desc.l_resource.lr_name);
951 LDLM_DEBUG(lock, "completion AST, new resource");
954 if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
955 lock->l_flags |= LDLM_FL_CBPENDING;
956 LDLM_DEBUG(lock, "completion AST includes blocking AST");
959 if (lock->l_lvb_len) {
961 lvb = lustre_swab_reqbuf(req, 1, lock->l_lvb_len,
962 lock->l_lvb_swabber);
964 LDLM_ERROR(lock, "completion AST did not contain "
967 memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
971 lock->l_resource->lr_tmp = &ast_list;
972 ldlm_grant_lock(lock, req, sizeof(*req), 1);
973 lock->l_resource->lr_tmp = NULL;
974 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
975 l_unlock(&ns->ns_lock);
978 ldlm_run_ast_work(ns, &ast_list);
980 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
985 static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
986 struct ldlm_namespace *ns,
987 struct ldlm_request *dlm_req,
988 struct ldlm_lock *lock)
993 l_lock(&ns->ns_lock);
994 LDLM_DEBUG(lock, "client glimpse AST callback handler");
996 if (lock->l_glimpse_ast != NULL) {
997 l_unlock(&ns->ns_lock);
998 l_check_no_ns_lock(ns);
999 rc = lock->l_glimpse_ast(lock, req);
1000 l_lock(&ns->ns_lock);
1003 if (req->rq_repmsg != NULL) {
1006 req->rq_status = rc;
1010 l_unlock(&ns->ns_lock);
1011 if (lock->l_granted_mode == LCK_PW &&
1012 !lock->l_readers && !lock->l_writers &&
1013 time_after(jiffies, lock->l_last_used + 10 * HZ)) {
1014 if (ldlm_bl_to_thread(ns, NULL, lock))
1015 ldlm_handle_bl_callback(ns, NULL, lock);
1020 LDLM_LOCK_PUT(lock);
1024 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
1026 req->rq_status = rc;
1027 if (req->rq_reply_state == NULL) {
1028 rc = lustre_pack_reply(req, 0, NULL, NULL);
1032 return ptlrpc_reply(req);
1035 int ldlm_bl_to_thread(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
1036 struct ldlm_lock *lock)
1039 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1040 struct ldlm_bl_work_item *blwi;
1043 OBD_ALLOC(blwi, sizeof(*blwi));
1049 blwi->blwi_ld = *ld;
1050 blwi->blwi_lock = lock;
1052 spin_lock(&blp->blp_lock);
1053 list_add_tail(&blwi->blwi_entry, &blp->blp_list);
1054 wake_up(&blp->blp_waitq);
1055 spin_unlock(&blp->blp_lock);
1064 static int ldlm_msg_check_version(struct lustre_msg *msg)
1072 case LDLM_BL_CALLBACK:
1073 case LDLM_CP_CALLBACK:
1074 case LDLM_GL_CALLBACK:
1075 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1077 CERROR("bad opc %u version %08x, expecting %08x\n",
1078 msg->opc, msg->version, LUSTRE_DLM_VERSION);
1080 case OBD_LOG_CANCEL:
1081 case LLOG_ORIGIN_HANDLE_OPEN:
1082 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1083 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1084 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1085 case LLOG_ORIGIN_HANDLE_CLOSE:
1087 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1089 CERROR("bad opc %u version %08x, expecting %08x\n",
1090 msg->opc, msg->version, LUSTRE_LOG_VERSION);
1093 CERROR("LDLM unknown opcode %d\n", msg->opc);
1101 static int ldlm_callback_handler(struct ptlrpc_request *req)
1103 struct ldlm_namespace *ns;
1104 struct ldlm_request *dlm_req;
1105 struct ldlm_lock *lock;
1109 rc = ldlm_msg_check_version(req->rq_reqmsg);
1111 CERROR("LDLM_CB drop mal-formed request\n");
1115 /* Requests arrive in sender's byte order. The ptlrpc service
1116 * handler has already checked and, if necessary, byte-swapped the
1117 * incoming request message body, but I am responsible for the
1118 * message buffers. */
1120 if (req->rq_export == NULL) {
1121 struct ldlm_request *dlm_req;
1123 CDEBUG(D_RPCTRACE, "operation %d from %s with bad "
1124 "export cookie "LPX64"; this is "
1125 "normal if this node rebooted with a lock held\n",
1126 req->rq_reqmsg->opc,
1128 req->rq_reqmsg->handle.cookie);
1129 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
1130 lustre_swab_ldlm_request);
1131 if (dlm_req != NULL)
1132 CDEBUG(D_RPCTRACE, "--> lock cookie: "LPX64"\n",
1133 dlm_req->lock_handle1.cookie);
1135 ldlm_callback_reply(req, -ENOTCONN);
1139 LASSERT(req->rq_export != NULL);
1140 LASSERT(req->rq_export->exp_obd != NULL);
1142 switch(req->rq_reqmsg->opc) {
1143 case LDLM_BL_CALLBACK:
1144 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
1146 case LDLM_CP_CALLBACK:
1147 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CP_CALLBACK, 0);
1149 case LDLM_GL_CALLBACK:
1150 OBD_FAIL_RETURN(OBD_FAIL_LDLM_GL_CALLBACK, 0);
1152 case OBD_LOG_CANCEL:
1153 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1154 rc = llog_origin_handle_cancel(req);
1155 ldlm_callback_reply(req, rc);
1157 case LLOG_ORIGIN_HANDLE_OPEN:
1158 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1159 rc = llog_origin_handle_open(req);
1160 ldlm_callback_reply(req, rc);
1162 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
1163 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1164 rc = llog_origin_handle_next_block(req);
1165 ldlm_callback_reply(req, rc);
1167 case LLOG_ORIGIN_HANDLE_PREV_BLOCK:
1168 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1169 rc = llog_origin_handle_prev_block(req);
1170 ldlm_callback_reply(req, rc);
1172 case LLOG_ORIGIN_HANDLE_READ_HEADER:
1173 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1174 rc = llog_origin_handle_read_header(req);
1175 ldlm_callback_reply(req, rc);
1177 case LLOG_ORIGIN_HANDLE_CLOSE:
1178 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOGD_NET, 0);
1179 rc = llog_origin_handle_close(req);
1180 ldlm_callback_reply(req, rc);
1183 CERROR("unknown opcode %u\n", req->rq_reqmsg->opc);
1184 ldlm_callback_reply(req, -EPROTO);
1188 ns = req->rq_export->exp_obd->obd_namespace;
1189 LASSERT(ns != NULL);
1191 dlm_req = lustre_swab_reqbuf (req, 0, sizeof (*dlm_req),
1192 lustre_swab_ldlm_request);
1193 if (dlm_req == NULL) {
1194 CERROR ("can't unpack dlm_req\n");
1195 ldlm_callback_reply (req, -EPROTO);
1199 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
1201 LDLM_DEBUG_NOLOCK("callback on lock "LPX64" - lock "
1202 "disappeared\n",dlm_req->lock_handle1.cookie);
1203 ldlm_callback_reply(req, -EINVAL);
1207 /* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
1208 lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
1210 /* We want the ost thread to get this reply so that it can respond
1211 * to ost requests (write cache writeback) that might be triggered
1214 * But we'd also like to be able to indicate in the reply that we're
1215 * cancelling right now, because it's unused, or have an intent result
1216 * in the reply, so we might have to push the responsibility for sending
1217 * the reply down into the AST handlers, alas. */
1219 switch (req->rq_reqmsg->opc) {
1220 case LDLM_BL_CALLBACK:
1221 CDEBUG(D_INODE, "blocking ast\n");
1222 ldlm_callback_reply(req, 0);
1223 if (ldlm_bl_to_thread(ns, &dlm_req->lock_desc, lock))
1224 ldlm_handle_bl_callback(ns, &dlm_req->lock_desc, lock);
1227 case LDLM_CP_CALLBACK:
1228 CDEBUG(D_INODE, "completion ast\n");
1229 ldlm_callback_reply(req, 0);
1230 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
1232 case LDLM_GL_CALLBACK:
1233 CDEBUG(D_INODE, "glimpse ast\n");
1234 ldlm_handle_gl_callback(req, ns, dlm_req, lock);
1237 LBUG(); /* checked above */
1243 static int ldlm_cancel_handler(struct ptlrpc_request *req)
1248 rc = ldlm_msg_check_version(req->rq_reqmsg);
1250 CERROR("LDLM_CL drop mal-formed request\n");
1254 /* Requests arrive in sender's byte order. The ptlrpc service
1255 * handler has already checked and, if necessary, byte-swapped the
1256 * incoming request message body, but I am responsible for the
1257 * message buffers. */
1259 if (req->rq_export == NULL) {
1260 struct ldlm_request *dlm_req;
1261 CERROR("operation %d with bad export from %s\n",
1262 req->rq_reqmsg->opc,
1264 CERROR("--> export cookie: "LPX64"\n",
1265 req->rq_reqmsg->handle.cookie);
1266 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
1267 lustre_swab_ldlm_request);
1268 if (dlm_req != NULL)
1269 ldlm_lock_dump_handle(D_ERROR, &dlm_req->lock_handle1);
1270 ldlm_callback_reply(req, -ENOTCONN);
1274 switch (req->rq_reqmsg->opc) {
1276 /* XXX FIXME move this back to mds/handler.c, bug 249 */
1278 CDEBUG(D_INODE, "cancel\n");
1279 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1280 rc = ldlm_handle_cancel(req);
1283 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
1284 ldlm_callback_reply(req, -EINVAL);
1291 static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
1293 struct ldlm_bl_work_item *blwi = NULL;
1295 spin_lock(&blp->blp_lock);
1296 if (!list_empty(&blp->blp_list)) {
1297 blwi = list_entry(blp->blp_list.next, struct ldlm_bl_work_item,
1299 list_del(&blwi->blwi_entry);
1301 spin_unlock(&blp->blp_lock);
1306 struct ldlm_bl_thread_data {
1308 struct ldlm_bl_pool *bltd_blp;
1311 static int ldlm_bl_thread_main(void *arg)
1313 struct ldlm_bl_thread_data *bltd = arg;
1314 struct ldlm_bl_pool *blp = bltd->bltd_blp;
1315 unsigned long flags;
1318 /* XXX boiler-plate */
1320 char name[sizeof(current->comm)];
1321 snprintf(name, sizeof(name) - 1, "ldlm_bl_%02d",
1323 kportal_daemonize(name);
1325 SIGNAL_MASK_LOCK(current, flags);
1326 sigfillset(¤t->blocked);
1328 SIGNAL_MASK_UNLOCK(current, flags);
1330 atomic_inc(&blp->blp_num_threads);
1331 complete(&blp->blp_comp);
1334 struct l_wait_info lwi = { 0 };
1335 struct ldlm_bl_work_item *blwi = NULL;
1337 l_wait_event_exclusive(blp->blp_waitq,
1338 (blwi = ldlm_bl_get_work(blp)) != NULL,
1341 if (blwi->blwi_ns == NULL)
1344 ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
1346 OBD_FREE(blwi, sizeof(*blwi));
1349 atomic_dec(&blp->blp_num_threads);
1350 complete(&blp->blp_comp);
1356 static int ldlm_setup(void);
1357 static int ldlm_cleanup(int force);
1359 int ldlm_get_ref(void)
1362 down(&ldlm_ref_sem);
1363 if (++ldlm_refcount == 1) {
1373 void ldlm_put_ref(int force)
1375 down(&ldlm_ref_sem);
1376 if (ldlm_refcount == 1) {
1377 int rc = ldlm_cleanup(force);
1379 CERROR("ldlm_cleanup failed: %d\n", rc);
1390 static int ldlm_setup(void)
1392 struct ldlm_bl_pool *blp;
1399 if (ldlm_state != NULL)
1402 OBD_ALLOC(ldlm_state, sizeof(*ldlm_state));
1403 if (ldlm_state == NULL)
1407 rc = ldlm_proc_setup();
1412 ldlm_state->ldlm_cb_service =
1413 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
1414 LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1415 1500, ldlm_callback_handler, "ldlm_cbd",
1418 if (!ldlm_state->ldlm_cb_service) {
1419 CERROR("failed to start service\n");
1420 GOTO(out_proc, rc = -ENOMEM);
1423 ldlm_state->ldlm_cancel_service =
1424 ptlrpc_init_svc(LDLM_NBUFS, LDLM_BUFSIZE, LDLM_MAXREQSIZE,
1425 LDLM_CANCEL_REQUEST_PORTAL,
1426 LDLM_CANCEL_REPLY_PORTAL, 30000,
1427 ldlm_cancel_handler, "ldlm_canceld",
1430 if (!ldlm_state->ldlm_cancel_service) {
1431 CERROR("failed to start service\n");
1432 GOTO(out_proc, rc = -ENOMEM);
1435 OBD_ALLOC(blp, sizeof(*blp));
1437 GOTO(out_proc, rc = -ENOMEM);
1438 ldlm_state->ldlm_bl_pool = blp;
1440 atomic_set(&blp->blp_num_threads, 0);
1441 init_waitqueue_head(&blp->blp_waitq);
1442 spin_lock_init(&blp->blp_lock);
1444 INIT_LIST_HEAD(&blp->blp_list);
1447 for (i = 0; i < LDLM_NUM_THREADS; i++) {
1448 struct ldlm_bl_thread_data bltd = {
1452 init_completion(&blp->blp_comp);
1453 rc = kernel_thread(ldlm_bl_thread_main, &bltd, 0);
1455 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
1456 GOTO(out_thread, rc);
1458 wait_for_completion(&blp->blp_comp);
1461 rc = ptlrpc_start_n_threads(NULL, ldlm_state->ldlm_cancel_service,
1462 LDLM_NUM_THREADS, "ldlm_cn");
1464 GOTO(out_thread, rc);
1466 rc = ptlrpc_start_n_threads(NULL, ldlm_state->ldlm_cb_service,
1467 LDLM_NUM_THREADS, "ldlm_cb");
1469 GOTO(out_thread, rc);
1471 INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
1472 spin_lock_init(&expired_lock_thread.elt_lock);
1473 expired_lock_thread.elt_state = ELT_STOPPED;
1474 init_waitqueue_head(&expired_lock_thread.elt_waitq);
1476 rc = kernel_thread(expired_lock_main, NULL, CLONE_VM | CLONE_FS);
1478 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
1479 GOTO(out_thread, rc);
1482 wait_event(expired_lock_thread.elt_waitq,
1483 expired_lock_thread.elt_state == ELT_READY);
1485 INIT_LIST_HEAD(&waiting_locks_list);
1486 spin_lock_init(&waiting_locks_spinlock);
1487 waiting_locks_timer.function = waiting_locks_callback;
1488 waiting_locks_timer.data = 0;
1489 init_timer(&waiting_locks_timer);
1496 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
1497 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
1502 ldlm_proc_cleanup();
1505 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
1510 static int ldlm_cleanup(int force)
1513 struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
1517 if (!list_empty(&ldlm_namespace_list)) {
1518 CERROR("ldlm still has namespaces; clean these up first.\n");
1519 ldlm_dump_all_namespaces(D_DLMTRACE);
1524 while (atomic_read(&blp->blp_num_threads) > 0) {
1525 struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
1527 init_completion(&blp->blp_comp);
1529 spin_lock(&blp->blp_lock);
1530 list_add_tail(&blwi.blwi_entry, &blp->blp_list);
1531 wake_up(&blp->blp_waitq);
1532 spin_unlock(&blp->blp_lock);
1534 wait_for_completion(&blp->blp_comp);
1536 OBD_FREE(blp, sizeof(*blp));
1538 ptlrpc_stop_all_threads(ldlm_state->ldlm_cb_service);
1539 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
1540 ptlrpc_stop_all_threads(ldlm_state->ldlm_cancel_service);
1541 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
1542 ldlm_proc_cleanup();
1544 expired_lock_thread.elt_state = ELT_TERMINATE;
1545 wake_up(&expired_lock_thread.elt_waitq);
1546 wait_event(expired_lock_thread.elt_waitq,
1547 expired_lock_thread.elt_state == ELT_STOPPED);
1549 ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
1550 ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
1553 OBD_FREE(ldlm_state, sizeof(*ldlm_state));
1559 int __init ldlm_init(void)
1561 ldlm_resource_slab = kmem_cache_create("ldlm_resources",
1562 sizeof(struct ldlm_resource), 0,
1563 SLAB_HWCACHE_ALIGN, NULL, NULL);
1564 if (ldlm_resource_slab == NULL)
1567 ldlm_lock_slab = kmem_cache_create("ldlm_locks",
1568 sizeof(struct ldlm_lock), 0,
1569 SLAB_HWCACHE_ALIGN, NULL, NULL);
1570 if (ldlm_lock_slab == NULL) {
1571 kmem_cache_destroy(ldlm_resource_slab);
1575 l_lock_init(&ldlm_handle_lock);
1580 void __exit ldlm_exit(void)
1582 if ( ldlm_refcount )
1583 CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
1584 LASSERTF(kmem_cache_destroy(ldlm_resource_slab) == 0,
1585 "couldn't free ldlm resource slab\n");
1586 LASSERTF(kmem_cache_destroy(ldlm_lock_slab) == 0,
1587 "couldn't free ldlm lock slab\n");
1592 EXPORT_SYMBOL(ldlm_flock_completion_ast);
1595 EXPORT_SYMBOL(ldlm_extent_shift_kms);
1598 EXPORT_SYMBOL(ldlm_get_processing_policy);
1599 EXPORT_SYMBOL(ldlm_lock2desc);
1600 EXPORT_SYMBOL(ldlm_register_intent);
1601 EXPORT_SYMBOL(ldlm_lockname);
1602 EXPORT_SYMBOL(ldlm_typename);
1603 EXPORT_SYMBOL(ldlm_lock2handle);
1604 EXPORT_SYMBOL(__ldlm_handle2lock);
1605 EXPORT_SYMBOL(ldlm_lock_get);
1606 EXPORT_SYMBOL(ldlm_lock_put);
1607 EXPORT_SYMBOL(ldlm_lock_match);
1608 EXPORT_SYMBOL(ldlm_lock_cancel);
1609 EXPORT_SYMBOL(ldlm_lock_addref);
1610 EXPORT_SYMBOL(ldlm_lock_decref);
1611 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
1612 EXPORT_SYMBOL(ldlm_lock_change_resource);
1613 EXPORT_SYMBOL(ldlm_lock_set_data);
1614 EXPORT_SYMBOL(ldlm_it2str);
1615 EXPORT_SYMBOL(ldlm_lock_dump);
1616 EXPORT_SYMBOL(ldlm_lock_dump_handle);
1617 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
1618 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1619 EXPORT_SYMBOL(ldlm_lock_allow_match);
1621 /* ldlm_request.c */
1622 EXPORT_SYMBOL(ldlm_completion_ast);
1623 EXPORT_SYMBOL(ldlm_expired_completion_wait);
1624 EXPORT_SYMBOL(ldlm_cli_convert);
1625 EXPORT_SYMBOL(ldlm_cli_enqueue);
1626 EXPORT_SYMBOL(ldlm_cli_cancel);
1627 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
1628 EXPORT_SYMBOL(ldlm_replay_locks);
1629 EXPORT_SYMBOL(ldlm_resource_foreach);
1630 EXPORT_SYMBOL(ldlm_namespace_foreach);
1631 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
1632 EXPORT_SYMBOL(ldlm_change_cbdata);
1635 EXPORT_SYMBOL(ldlm_server_blocking_ast);
1636 EXPORT_SYMBOL(ldlm_server_completion_ast);
1637 EXPORT_SYMBOL(ldlm_server_glimpse_ast);
1638 EXPORT_SYMBOL(ldlm_handle_enqueue);
1639 EXPORT_SYMBOL(ldlm_handle_cancel);
1640 EXPORT_SYMBOL(ldlm_handle_convert);
1641 EXPORT_SYMBOL(ldlm_del_waiting_lock);
1642 EXPORT_SYMBOL(ldlm_get_ref);
1643 EXPORT_SYMBOL(ldlm_put_ref);
1647 EXPORT_SYMBOL(ldlm_test);
1648 EXPORT_SYMBOL(ldlm_regression_start);
1649 EXPORT_SYMBOL(ldlm_regression_stop);
1652 /* ldlm_resource.c */
1653 EXPORT_SYMBOL(ldlm_namespace_new);
1654 EXPORT_SYMBOL(ldlm_namespace_cleanup);
1655 EXPORT_SYMBOL(ldlm_namespace_free);
1656 EXPORT_SYMBOL(ldlm_namespace_dump);
1657 EXPORT_SYMBOL(ldlm_dump_all_namespaces);
1658 EXPORT_SYMBOL(ldlm_resource_get);
1659 EXPORT_SYMBOL(ldlm_resource_putref);
1662 EXPORT_SYMBOL(l_lock);
1663 EXPORT_SYMBOL(l_unlock);
1666 EXPORT_SYMBOL(client_import_add_conn);
1667 EXPORT_SYMBOL(client_import_del_conn);
1668 EXPORT_SYMBOL(client_obd_setup);
1669 EXPORT_SYMBOL(client_obd_cleanup);
1670 EXPORT_SYMBOL(client_connect_import);
1671 EXPORT_SYMBOL(client_disconnect_export);
1672 EXPORT_SYMBOL(target_start_recovery_thread);
1673 EXPORT_SYMBOL(target_stop_recovery_thread);
1674 EXPORT_SYMBOL(target_handle_connect);
1675 EXPORT_SYMBOL(target_cleanup_recovery);
1676 EXPORT_SYMBOL(target_destroy_export);
1677 EXPORT_SYMBOL(target_cancel_recovery_timer);
1678 EXPORT_SYMBOL(target_send_reply);
1679 EXPORT_SYMBOL(target_queue_recovery_request);
1680 EXPORT_SYMBOL(target_handle_ping);
1681 EXPORT_SYMBOL(target_handle_disconnect);