1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 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 DEBUG_SUBSYSTEM S_LDLM
27 #include <linux/module.h>
28 #include <linux/slab.h>
29 #include <linux/lustre_dlm.h>
30 #include <linux/init.h>
31 #include <linux/obd_class.h>
33 extern kmem_cache_t *ldlm_resource_slab;
34 extern kmem_cache_t *ldlm_lock_slab;
35 extern struct lustre_lock ldlm_handle_lock;
36 extern struct list_head ldlm_namespace_list;
37 extern int (*mds_reint_p)(int offset, struct ptlrpc_request *req);
38 extern int (*mds_getattr_name_p)(int offset, struct ptlrpc_request *req);
40 inline unsigned long round_timeout(unsigned long timeout)
42 return ((timeout / HZ) + 1) * HZ;
45 static struct list_head waiting_locks_list;
46 static spinlock_t waiting_locks_spinlock;
47 static struct timer_list waiting_locks_timer;
48 static int ldlm_already_setup = 0;
50 static void waiting_locks_callback(unsigned long unused)
52 struct list_head *liter, *n;
54 spin_lock_bh(&waiting_locks_spinlock);
55 list_for_each_safe(liter, n, &waiting_locks_list) {
56 struct ldlm_lock *l = list_entry(liter, struct ldlm_lock,
58 if (l->l_callback_timeout > jiffies)
60 CERROR("lock timer expired, lock %p\n", l);
61 LDLM_DEBUG(l, "timer expired, recovering exp %p on conn %p",
62 l->l_export, l->l_export->exp_connection);
63 recovd_conn_fail(l->l_export->exp_connection);
65 spin_unlock_bh(&waiting_locks_spinlock);
69 * Indicate that we're waiting for a client to call us back cancelling a given
70 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
71 * timer to fire appropriately. (We round up to the next second, to avoid
72 * floods of timer firings during periods of high lock contention and traffic).
74 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
76 unsigned long timeout_rounded;
79 LASSERT(list_empty(&lock->l_pending_chain));
81 spin_lock_bh(&waiting_locks_spinlock);
82 lock->l_callback_timeout = jiffies + (obd_timeout * HZ / 2);
84 timeout_rounded = round_timeout(lock->l_callback_timeout);
86 if (timeout_rounded < waiting_locks_timer.expires ||
87 !timer_pending(&waiting_locks_timer)) {
88 mod_timer(&waiting_locks_timer, timeout_rounded);
90 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
91 spin_unlock_bh(&waiting_locks_spinlock);
96 * Remove a lock from the pending list, likely because it had its cancellation
97 * callback arrive without incident. This adjusts the lock-timeout timer if
98 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
100 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
102 struct list_head *list_next;
106 spin_lock_bh(&waiting_locks_spinlock);
108 if (list_empty(&lock->l_pending_chain)) {
109 spin_unlock_bh(&waiting_locks_spinlock);
113 list_next = lock->l_pending_chain.next;
114 if (lock->l_pending_chain.prev == &waiting_locks_list) {
115 /* Removing the head of the list, adjust timer. */
116 if (list_next == &waiting_locks_list) {
117 /* No more, just cancel. */
118 del_timer(&waiting_locks_timer);
120 struct ldlm_lock *next;
121 next = list_entry(list_next, struct ldlm_lock,
123 mod_timer(&waiting_locks_timer,
124 round_timeout(next->l_callback_timeout));
127 list_del_init(&lock->l_pending_chain);
128 spin_unlock_bh(&waiting_locks_spinlock);
132 static int ldlm_server_blocking_ast(struct ldlm_lock *lock,
133 struct ldlm_lock_desc *desc,
134 void *data, __u32 data_len, int flag)
136 struct ldlm_request *body;
137 struct ptlrpc_request *req;
138 int rc = 0, size = sizeof(*body);
141 if (flag == LDLM_CB_CANCELING) {
142 /* Don't need to do anything here. */
148 l_lock(&lock->l_resource->lr_namespace->ns_lock);
149 if (lock->l_destroyed) {
150 /* What's the point? */
151 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
155 req = ptlrpc_prep_req(&lock->l_export->exp_ldlm_data.led_import,
156 LDLM_BL_CALLBACK, 1, &size, NULL);
160 body = lustre_msg_buf(req->rq_reqmsg, 0);
161 memcpy(&body->lock_handle1, &lock->l_remote_handle,
162 sizeof(body->lock_handle1));
163 memcpy(&body->lock_desc, desc, sizeof(*desc));
165 LDLM_DEBUG(lock, "server preparing blocking AST");
166 req->rq_replen = lustre_msg_size(0, NULL);
168 ldlm_add_waiting_lock(lock);
169 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
171 req->rq_level = LUSTRE_CONN_RECOVD;
172 rc = ptlrpc_queue_wait(req);
173 if (rc == -ETIMEDOUT || rc == -EINTR) {
174 ldlm_expired_completion_wait(lock);
176 CERROR("client returned %d from blocking AST for lock %p\n",
177 req->rq_status, lock);
178 LDLM_DEBUG(lock, "client returned error %d from blocking AST",
180 ldlm_lock_cancel(lock);
181 /* Server-side AST functions are called from ldlm_reprocess_all,
182 * which needs to be told to please restart its reprocessing. */
186 ptlrpc_req_finished(req);
191 static int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags)
193 struct ldlm_request *body;
194 struct ptlrpc_request *req;
195 int rc = 0, size = sizeof(*body);
203 req = ptlrpc_prep_req(&lock->l_export->exp_ldlm_data.led_import,
204 LDLM_CP_CALLBACK, 1, &size, NULL);
208 body = lustre_msg_buf(req->rq_reqmsg, 0);
209 memcpy(&body->lock_handle1, &lock->l_remote_handle,
210 sizeof(body->lock_handle1));
211 body->lock_flags = flags;
212 ldlm_lock2desc(lock, &body->lock_desc);
214 LDLM_DEBUG(lock, "server preparing completion AST");
215 req->rq_replen = lustre_msg_size(0, NULL);
217 req->rq_level = LUSTRE_CONN_RECOVD;
218 rc = ptlrpc_queue_wait(req);
219 if (rc == -ETIMEDOUT || rc == -EINTR) {
220 ldlm_expired_completion_wait(lock);
222 CERROR("client returned %d from completion AST for lock %p\n",
223 req->rq_status, lock);
224 LDLM_DEBUG(lock, "client returned error %d from completion AST",
226 ldlm_lock_cancel(lock);
227 /* Server-side AST functions are called from ldlm_reprocess_all,
228 * which needs to be told to please restart its reprocessing. */
231 ptlrpc_req_finished(req);
236 int ldlm_handle_enqueue(struct ptlrpc_request *req)
238 struct obd_device *obddev = req->rq_export->exp_obd;
239 struct ldlm_reply *dlm_rep;
240 struct ldlm_request *dlm_req;
241 int rc, size = sizeof(*dlm_rep), cookielen = 0;
244 struct ldlm_lock *lock = NULL;
248 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
250 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
251 flags = dlm_req->lock_flags;
252 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN &&
253 (flags & LDLM_FL_HAS_INTENT)) {
254 /* In this case, the reply buffer is allocated deep in
255 * local_lock_enqueue by the policy function. */
257 cookielen = sizeof(*req);
259 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen,
262 CERROR("out of memory\n");
265 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT) {
266 cookie = &dlm_req->lock_desc.l_extent;
267 cookielen = sizeof(struct ldlm_extent);
271 /* XXX notice that this lock has no callback data: of course the
272 export would be exactly what we may want to use here... */
273 lock = ldlm_lock_create(obddev->obd_namespace,
274 &dlm_req->lock_handle2,
275 dlm_req->lock_desc.l_resource.lr_name,
276 dlm_req->lock_desc.l_resource.lr_type,
277 dlm_req->lock_desc.l_req_mode, NULL, 0);
279 GOTO(out, err = -ENOMEM);
281 memcpy(&lock->l_remote_handle, &dlm_req->lock_handle1,
282 sizeof(lock->l_remote_handle));
283 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
285 LASSERT(req->rq_export);
286 lock->l_export = req->rq_export;
287 l_lock(&lock->l_resource->lr_namespace->ns_lock);
288 list_add(&lock->l_export_chain,
289 &lock->l_export->exp_ldlm_data.led_held_locks);
290 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
292 err = ldlm_lock_enqueue(obddev->obd_namespace, lock, cookie, cookielen,
293 &flags, ldlm_server_completion_ast,
294 ldlm_server_blocking_ast);
298 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
299 dlm_rep->lock_flags = flags;
301 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
302 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
303 memcpy(&dlm_rep->lock_extent, &lock->l_extent,
304 sizeof(lock->l_extent));
305 if (dlm_rep->lock_flags & LDLM_FL_LOCK_CHANGED) {
306 memcpy(dlm_rep->lock_resource_name, lock->l_resource->lr_name,
307 sizeof(dlm_rep->lock_resource_name));
308 dlm_rep->lock_mode = lock->l_req_mode;
314 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
316 req->rq_status = err;
320 ldlm_reprocess_all(lock->l_resource);
323 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p)", lock);
328 int ldlm_handle_convert(struct ptlrpc_request *req)
330 struct ldlm_request *dlm_req;
331 struct ldlm_reply *dlm_rep;
332 struct ldlm_lock *lock;
333 int rc, size = sizeof(*dlm_rep);
336 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
338 CERROR("out of memory\n");
341 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
342 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
343 dlm_rep->lock_flags = dlm_req->lock_flags;
345 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
347 req->rq_status = EINVAL;
349 LDLM_DEBUG(lock, "server-side convert handler START");
350 ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
351 &dlm_rep->lock_flags);
352 if (ldlm_del_waiting_lock(lock))
353 CDEBUG(D_DLMTRACE, "converted waiting lock %p\n", lock);
358 ldlm_reprocess_all(lock->l_resource);
359 LDLM_DEBUG(lock, "server-side convert handler END");
362 LDLM_DEBUG_NOLOCK("server-side convert handler END");
367 int ldlm_handle_cancel(struct ptlrpc_request *req)
369 struct ldlm_request *dlm_req;
370 struct ldlm_lock *lock;
374 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
376 CERROR("out of memory\n");
379 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
381 CERROR("bad request buffer for cancel\n");
385 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
387 LDLM_DEBUG_NOLOCK("server-side cancel handler stale lock (lock "
388 "%p)", (void *)(unsigned long)
389 dlm_req->lock_handle1.addr);
390 req->rq_status = ESTALE;
392 LDLM_DEBUG(lock, "server-side cancel handler START");
393 ldlm_lock_cancel(lock);
394 if (ldlm_del_waiting_lock(lock))
395 CDEBUG(D_DLMTRACE, "cancelled waiting lock %p\n", lock);
399 if (ptlrpc_reply(req->rq_svc, req) != 0)
403 ldlm_reprocess_all(lock->l_resource);
404 LDLM_DEBUG(lock, "server-side cancel handler END");
411 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *ns,
412 struct lustre_handle *handle);
414 static int ldlm_handle_bl_callback(struct ptlrpc_request *req,
415 struct ldlm_namespace *ns)
417 struct ldlm_request *dlm_req;
418 struct ldlm_lock *lock;
422 OBD_FAIL_RETURN(OBD_FAIL_OSC_LOCK_BL_AST, 0);
424 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
426 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
428 CERROR("blocking callback on lock "LPX64" - lock disappeared\n",
429 dlm_req->lock_handle1.cookie);
433 LDLM_DEBUG(lock, "client blocking AST callback handler START");
435 l_lock(&lock->l_resource->lr_namespace->ns_lock);
436 lock->l_flags |= LDLM_FL_CBPENDING;
437 do_ast = (!lock->l_readers && !lock->l_writers);
438 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
441 LDLM_DEBUG(lock, "already unused, calling "
442 "callback (%p)", lock->l_blocking_ast);
443 if (lock->l_blocking_ast != NULL) {
444 lock->l_blocking_ast(lock, &dlm_req->lock_desc,
445 lock->l_data, lock->l_data_len,
449 LDLM_DEBUG(lock, "Lock still has references, will be"
452 LDLM_DEBUG(lock, "client blocking callback handler END");
457 static int ldlm_handle_cp_callback(struct ptlrpc_request *req,
458 struct ldlm_namespace *ns)
460 struct list_head ast_list = LIST_HEAD_INIT(ast_list);
461 struct ldlm_request *dlm_req;
462 struct ldlm_lock *lock;
465 OBD_FAIL_RETURN(OBD_FAIL_OSC_LOCK_CP_AST, 0);
467 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
469 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
471 CERROR("completion callback on lock "LPX64" - lock "
472 "disappeared\n", dlm_req->lock_handle1.cookie);
476 LDLM_DEBUG(lock, "client completion callback handler START");
478 l_lock(&ns->ns_lock);
480 /* If we receive the completion AST before the actual enqueue returned,
481 * then we might need to switch lock modes, resources, or extents. */
482 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
483 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
484 LDLM_DEBUG(lock, "completion AST, new lock mode");
486 if (lock->l_resource->lr_type == LDLM_EXTENT)
487 memcpy(&lock->l_extent, &dlm_req->lock_desc.l_extent,
488 sizeof(lock->l_extent));
489 ldlm_resource_unlink_lock(lock);
490 if (memcmp(dlm_req->lock_desc.l_resource.lr_name,
491 lock->l_resource->lr_name,
492 sizeof(__u64) * RES_NAME_SIZE) != 0) {
493 ldlm_lock_change_resource(ns, lock,
494 dlm_req->lock_desc.l_resource.lr_name);
495 LDLM_DEBUG(lock, "completion AST, new resource");
497 lock->l_resource->lr_tmp = &ast_list;
498 ldlm_grant_lock(lock);
499 lock->l_resource->lr_tmp = NULL;
500 l_unlock(&ns->ns_lock);
501 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
504 ldlm_run_ast_work(&ast_list);
506 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
511 static int ldlm_callback_handler(struct ptlrpc_request *req)
513 struct ldlm_namespace *ns;
517 rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
519 CERROR("Invalid request: %d\n", rc);
523 if (req->rq_export == NULL) {
524 struct ldlm_request *dlm_req;
526 CERROR("operation %d with bad export (ptl req %d/rep %d)\n",
527 req->rq_reqmsg->opc, req->rq_request_portal,
528 req->rq_reply_portal);
529 CERROR("--> export addr: "LPX64", cookie: "LPX64"\n",
530 req->rq_reqmsg->addr, req->rq_reqmsg->cookie);
531 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
532 CERROR("--> lock addr: "LPX64", cookie: "LPX64"\n",
533 dlm_req->lock_handle1.addr,dlm_req->lock_handle1.cookie);
537 LASSERT(req->rq_export != NULL);
538 LASSERT(req->rq_export->exp_obd != NULL);
539 ns = req->rq_export->exp_obd->obd_namespace;
542 switch (req->rq_reqmsg->opc) {
543 case LDLM_BL_CALLBACK:
544 CDEBUG(D_INODE, "blocking ast\n");
545 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
546 rc = ldlm_handle_bl_callback(req, ns);
548 case LDLM_CP_CALLBACK:
549 CDEBUG(D_INODE, "completion ast\n");
550 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CP_CALLBACK, 0);
551 rc = ldlm_handle_cp_callback(req, ns);
554 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
560 ptlrpc_error(req->rq_svc, req);
562 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen,
566 ptlrpc_reply(req->rq_svc, req);
572 static int ldlm_cancel_handler(struct ptlrpc_request *req)
577 rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
579 CERROR("lustre_ldlm: Invalid request: %d\n", rc);
583 if (req->rq_export == NULL) {
584 struct ldlm_request *dlm_req;
585 CERROR("operation %d with bad export (ptl req %d/rep %d)\n",
586 req->rq_reqmsg->opc, req->rq_request_portal,
587 req->rq_reply_portal);
588 CERROR("--> export addr: "LPX64", cookie: "LPX64"\n",
589 req->rq_reqmsg->addr, req->rq_reqmsg->cookie);
590 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
591 ldlm_lock_dump_handle(D_ERROR, &dlm_req->lock_handle1);
592 CERROR("--> ignoring this error as a temporary workaround! "
597 switch (req->rq_reqmsg->opc) {
599 /* XXX FIXME move this back to mds/handler.c, bug 625069 */
601 CDEBUG(D_INODE, "cancel\n");
602 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
603 rc = ldlm_handle_cancel(req);
609 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
616 static int ldlm_iocontrol(unsigned int cmd, struct lustre_handle *conn, int len,
617 void *karg, void *uarg)
619 struct obd_device *obddev = class_conn2obd(conn);
620 struct ptlrpc_connection *connection;
624 if (_IOC_TYPE(cmd) != IOC_LDLM_TYPE || _IOC_NR(cmd) < IOC_LDLM_MIN_NR ||
625 _IOC_NR(cmd) > IOC_LDLM_MAX_NR) {
626 CDEBUG(D_IOCTL, "invalid ioctl (type %d, nr %d, size %d)\n",
627 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
631 OBD_ALLOC(obddev->u.ldlm.ldlm_client,
632 sizeof(*obddev->u.ldlm.ldlm_client));
633 connection = ptlrpc_uuid_to_connection("ldlm");
635 CERROR("No LDLM UUID found: assuming ldlm is local.\n");
639 err = ldlm_test(obddev, conn);
640 CERROR("-- done err %d\n", err);
643 ldlm_dump_all_namespaces();
646 GOTO(out, err = -EINVAL);
651 ptlrpc_put_connection(connection);
652 OBD_FREE(obddev->u.ldlm.ldlm_client,
653 sizeof(*obddev->u.ldlm.ldlm_client));
657 static int ldlm_setup(struct obd_device *obddev, obd_count len, void *buf)
659 struct ldlm_obd *ldlm = &obddev->u.ldlm;
663 if (ldlm_already_setup)
666 rc = ldlm_proc_setup(obddev);
670 ldlm->ldlm_cb_service =
671 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
672 LDLM_MAXREQSIZE, LDLM_CB_REQUEST_PORTAL,
673 LDLM_CB_REPLY_PORTAL, "self",
674 ldlm_callback_handler, "ldlm_cbd");
676 if (!ldlm->ldlm_cb_service) {
677 CERROR("failed to start service\n");
678 GOTO(out_proc, rc = -ENOMEM);
681 ldlm->ldlm_cancel_service =
682 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
683 LDLM_MAXREQSIZE, LDLM_CANCEL_REQUEST_PORTAL,
684 LDLM_CANCEL_REPLY_PORTAL, "self",
685 ldlm_cancel_handler, "ldlm_canceld");
687 if (!ldlm->ldlm_cancel_service) {
688 CERROR("failed to start service\n");
689 GOTO(out_proc, rc = -ENOMEM);
692 for (i = 0; i < LDLM_NUM_THREADS; i++) {
694 sprintf(name, "ldlm_cn_%02d", i);
695 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cancel_service,
698 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
700 GOTO(out_thread, rc);
704 for (i = 0; i < LDLM_NUM_THREADS; i++) {
706 sprintf(name, "ldlm_cb_%02d", i);
707 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cb_service, name);
709 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
711 GOTO(out_thread, rc);
715 INIT_LIST_HEAD(&waiting_locks_list);
716 spin_lock_init(&waiting_locks_spinlock);
717 waiting_locks_timer.function = waiting_locks_callback;
718 waiting_locks_timer.data = 0;
719 init_timer(&waiting_locks_timer);
721 ldlm_already_setup = 1;
726 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
727 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
728 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
729 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
732 ldlm_proc_cleanup(obddev);
737 static int ldlm_cleanup(struct obd_device *obddev)
739 struct ldlm_obd *ldlm = &obddev->u.ldlm;
742 if (!list_empty(&ldlm_namespace_list)) {
743 CERROR("ldlm still has namespaces; clean these up first.\n");
747 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
748 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
749 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
750 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
751 ldlm_proc_cleanup(obddev);
753 ldlm_already_setup = 0;
757 static int ldlm_connect(struct lustre_handle *conn, struct obd_device *src,
758 obd_uuid_t cluuid, struct recovd_obd *recovd,
759 ptlrpc_recovery_cb_t recover)
761 return class_connect(conn, src, cluuid);
764 struct obd_ops ldlm_obd_ops = {
765 o_owner: THIS_MODULE,
766 o_iocontrol: ldlm_iocontrol,
768 o_cleanup: ldlm_cleanup,
769 o_connect: ldlm_connect,
770 o_disconnect: class_disconnect
773 static int __init ldlm_init(void)
775 int rc = class_register_type(&ldlm_obd_ops, 0, OBD_LDLM_DEVICENAME);
779 ldlm_resource_slab = kmem_cache_create("ldlm_resources",
780 sizeof(struct ldlm_resource), 0,
781 SLAB_HWCACHE_ALIGN, NULL, NULL);
782 if (ldlm_resource_slab == NULL)
785 ldlm_lock_slab = kmem_cache_create("ldlm_locks",
786 sizeof(struct ldlm_lock), 0,
787 SLAB_HWCACHE_ALIGN, NULL, NULL);
788 if (ldlm_lock_slab == NULL) {
789 kmem_cache_destroy(ldlm_resource_slab);
793 l_lock_init(&ldlm_handle_lock);
798 static void __exit ldlm_exit(void)
800 class_unregister_type(OBD_LDLM_DEVICENAME);
801 if (kmem_cache_destroy(ldlm_resource_slab) != 0)
802 CERROR("couldn't free ldlm resource slab\n");
803 if (kmem_cache_destroy(ldlm_lock_slab) != 0)
804 CERROR("couldn't free ldlm lock slab\n");
807 EXPORT_SYMBOL(ldlm_completion_ast);
808 EXPORT_SYMBOL(ldlm_handle_enqueue);
809 EXPORT_SYMBOL(ldlm_handle_cancel);
810 EXPORT_SYMBOL(ldlm_handle_convert);
811 EXPORT_SYMBOL(ldlm_register_intent);
812 EXPORT_SYMBOL(ldlm_unregister_intent);
813 EXPORT_SYMBOL(ldlm_lockname);
814 EXPORT_SYMBOL(ldlm_typename);
815 EXPORT_SYMBOL(__ldlm_handle2lock);
816 EXPORT_SYMBOL(ldlm_lock2handle);
817 EXPORT_SYMBOL(ldlm_lock_put);
818 EXPORT_SYMBOL(ldlm_lock_match);
819 EXPORT_SYMBOL(ldlm_lock_addref);
820 EXPORT_SYMBOL(ldlm_lock_decref);
821 EXPORT_SYMBOL(ldlm_lock_change_resource);
822 EXPORT_SYMBOL(ldlm_lock_set_data);
823 EXPORT_SYMBOL(ldlm_cli_convert);
824 EXPORT_SYMBOL(ldlm_cli_enqueue);
825 EXPORT_SYMBOL(ldlm_cli_cancel);
826 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
827 EXPORT_SYMBOL(ldlm_match_or_enqueue);
828 EXPORT_SYMBOL(ldlm_it2str);
829 EXPORT_SYMBOL(ldlm_test);
830 EXPORT_SYMBOL(ldlm_regression_start);
831 EXPORT_SYMBOL(ldlm_regression_stop);
832 EXPORT_SYMBOL(ldlm_lock_dump);
833 EXPORT_SYMBOL(ldlm_lock_dump_handle);
834 EXPORT_SYMBOL(ldlm_namespace_new);
835 EXPORT_SYMBOL(ldlm_namespace_cleanup);
836 EXPORT_SYMBOL(ldlm_namespace_free);
837 EXPORT_SYMBOL(ldlm_namespace_dump);
838 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
839 EXPORT_SYMBOL(ldlm_replay_locks);
840 EXPORT_SYMBOL(ldlm_resource_foreach);
841 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
842 EXPORT_SYMBOL(ldlm_namespace_foreach);
843 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
844 EXPORT_SYMBOL(l_lock);
845 EXPORT_SYMBOL(l_unlock);
847 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
848 MODULE_DESCRIPTION("Lustre Lock Management Module v0.1");
849 MODULE_LICENSE("GPL");
851 module_init(ldlm_init);
852 module_exit(ldlm_exit);