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 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 /* XXX should this be per-ldlm? */
46 static struct list_head waiting_locks_list;
47 static spinlock_t waiting_locks_spinlock;
48 static struct timer_list waiting_locks_timer;
49 static int ldlm_already_setup = 0;
51 static void waiting_locks_callback(unsigned long unused)
53 struct list_head *liter, *n;
55 spin_lock_bh(&waiting_locks_spinlock);
56 list_for_each_safe(liter, n, &waiting_locks_list) {
57 struct ldlm_lock *l = list_entry(liter, struct ldlm_lock,
59 if (l->l_callback_timeout > jiffies)
61 CERROR("lock timer expired, lock %p\n", l);
62 LDLM_DEBUG(l, "timer expired, recovering exp %p on conn %p",
63 l->l_export, l->l_export->exp_connection);
64 recovd_conn_fail(l->l_export->exp_connection);
66 spin_unlock_bh(&waiting_locks_spinlock);
70 * Indicate that we're waiting for a client to call us back cancelling a given
71 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
72 * timer to fire appropriately. (We round up to the next second, to avoid
73 * floods of timer firings during periods of high lock contention and traffic).
75 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
77 unsigned long timeout_rounded;
80 LASSERT(list_empty(&lock->l_pending_chain));
82 spin_lock_bh(&waiting_locks_spinlock);
83 lock->l_callback_timeout = jiffies + (obd_timeout * HZ / 2);
85 timeout_rounded = round_timeout(lock->l_callback_timeout);
87 if (timeout_rounded < waiting_locks_timer.expires ||
88 !timer_pending(&waiting_locks_timer)) {
89 mod_timer(&waiting_locks_timer, timeout_rounded);
91 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
92 spin_unlock_bh(&waiting_locks_spinlock);
97 * Remove a lock from the pending list, likely because it had its cancellation
98 * callback arrive without incident. This adjusts the lock-timeout timer if
99 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
101 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
103 struct list_head *list_next;
107 spin_lock_bh(&waiting_locks_spinlock);
109 if (list_empty(&lock->l_pending_chain)) {
110 spin_unlock_bh(&waiting_locks_spinlock);
114 list_next = lock->l_pending_chain.next;
115 if (lock->l_pending_chain.prev == &waiting_locks_list) {
116 /* Removing the head of the list, adjust timer. */
117 if (list_next == &waiting_locks_list) {
118 /* No more, just cancel. */
119 del_timer(&waiting_locks_timer);
121 struct ldlm_lock *next;
122 next = list_entry(list_next, struct ldlm_lock,
124 mod_timer(&waiting_locks_timer,
125 round_timeout(next->l_callback_timeout));
128 list_del_init(&lock->l_pending_chain);
129 spin_unlock_bh(&waiting_locks_spinlock);
133 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
134 struct ldlm_lock_desc *desc,
135 void *data, int flag)
137 struct ldlm_request *body;
138 struct ptlrpc_request *req;
139 int rc = 0, size = sizeof(*body);
142 if (flag == LDLM_CB_CANCELING) {
143 /* Don't need to do anything here. */
149 l_lock(&lock->l_resource->lr_namespace->ns_lock);
150 /* XXX This is necessary because, with the lock re-tasking, we actually
151 * _can_ get called in here twice. (bug 830) */
152 if (!list_empty(&lock->l_pending_chain)) {
153 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
157 if (lock->l_destroyed) {
158 /* What's the point? */
159 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
163 req = ptlrpc_prep_req(&lock->l_export->exp_ldlm_data.led_import,
164 LDLM_BL_CALLBACK, 1, &size, NULL);
168 body = lustre_msg_buf(req->rq_reqmsg, 0);
169 memcpy(&body->lock_handle1, &lock->l_remote_handle,
170 sizeof(body->lock_handle1));
171 memcpy(&body->lock_desc, desc, sizeof(*desc));
173 LDLM_DEBUG(lock, "server preparing blocking AST");
174 req->rq_replen = lustre_msg_size(0, NULL);
176 ldlm_add_waiting_lock(lock);
177 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
179 req->rq_level = LUSTRE_CONN_RECOVD;
180 rc = ptlrpc_queue_wait(req);
181 if (rc == -ETIMEDOUT || rc == -EINTR) {
182 ldlm_del_waiting_lock(lock);
183 ldlm_expired_completion_wait(lock);
185 CERROR("client returned %d from blocking AST for lock %p\n",
186 req->rq_status, lock);
187 LDLM_DEBUG(lock, "client returned error %d from blocking AST",
189 ldlm_lock_cancel(lock);
190 /* Server-side AST functions are called from ldlm_reprocess_all,
191 * which needs to be told to please restart its reprocessing. */
195 ptlrpc_req_finished(req);
200 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
202 struct ldlm_request *body;
203 struct ptlrpc_request *req;
204 int rc = 0, size = sizeof(*body);
212 req = ptlrpc_prep_req(&lock->l_export->exp_ldlm_data.led_import,
213 LDLM_CP_CALLBACK, 1, &size, NULL);
217 body = lustre_msg_buf(req->rq_reqmsg, 0);
218 memcpy(&body->lock_handle1, &lock->l_remote_handle,
219 sizeof(body->lock_handle1));
220 body->lock_flags = flags;
221 ldlm_lock2desc(lock, &body->lock_desc);
223 LDLM_DEBUG(lock, "server preparing completion AST");
224 req->rq_replen = lustre_msg_size(0, NULL);
226 req->rq_level = LUSTRE_CONN_RECOVD;
227 rc = ptlrpc_queue_wait(req);
228 if (rc == -ETIMEDOUT || rc == -EINTR) {
229 ldlm_del_waiting_lock(lock);
230 ldlm_expired_completion_wait(lock);
232 CERROR("client returned %d from completion AST for lock %p\n",
233 req->rq_status, lock);
234 LDLM_DEBUG(lock, "client returned error %d from completion AST",
236 ldlm_lock_cancel(lock);
237 /* Server-side AST functions are called from ldlm_reprocess_all,
238 * which needs to be told to please restart its reprocessing. */
241 ptlrpc_req_finished(req);
246 int ldlm_handle_enqueue(struct ptlrpc_request *req,
247 ldlm_completion_callback completion_callback,
248 ldlm_blocking_callback blocking_callback)
250 struct obd_device *obddev = req->rq_export->exp_obd;
251 struct ldlm_reply *dlm_rep;
252 struct ldlm_request *dlm_req;
253 int rc, size = sizeof(*dlm_rep), cookielen = 0;
256 struct ldlm_lock *lock = NULL;
260 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
262 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
263 flags = dlm_req->lock_flags;
264 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN &&
265 (flags & LDLM_FL_HAS_INTENT)) {
266 /* In this case, the reply buffer is allocated deep in
267 * local_lock_enqueue by the policy function. */
269 cookielen = sizeof(*req);
271 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen,
274 CERROR("out of memory\n");
277 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT) {
278 cookie = &dlm_req->lock_desc.l_extent;
279 cookielen = sizeof(struct ldlm_extent);
283 /* The lock's callback data might be set in the policy function */
284 lock = ldlm_lock_create(obddev->obd_namespace,
285 &dlm_req->lock_handle2,
286 dlm_req->lock_desc.l_resource.lr_name,
287 dlm_req->lock_desc.l_resource.lr_type,
288 dlm_req->lock_desc.l_req_mode, NULL, 0);
290 GOTO(out, err = -ENOMEM);
292 memcpy(&lock->l_remote_handle, &dlm_req->lock_handle1,
293 sizeof(lock->l_remote_handle));
294 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
296 LASSERT(req->rq_export);
297 lock->l_export = req->rq_export;
298 l_lock(&lock->l_resource->lr_namespace->ns_lock);
299 list_add(&lock->l_export_chain,
300 &lock->l_export->exp_ldlm_data.led_held_locks);
301 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
303 err = ldlm_lock_enqueue(obddev->obd_namespace, &lock, cookie, cookielen,
304 &flags, completion_callback, blocking_callback);
308 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
309 dlm_rep->lock_flags = flags;
311 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
312 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
313 memcpy(&dlm_rep->lock_extent, &lock->l_extent,
314 sizeof(lock->l_extent));
315 if (dlm_rep->lock_flags & LDLM_FL_LOCK_CHANGED) {
316 memcpy(&dlm_rep->lock_resource_name, &lock->l_resource->lr_name,
317 sizeof(dlm_rep->lock_resource_name));
318 dlm_rep->lock_mode = lock->l_req_mode;
324 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
326 req->rq_status = err;
328 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
329 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
332 ldlm_reprocess_all(lock->l_resource);
335 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p)", lock);
340 int ldlm_handle_convert(struct ptlrpc_request *req)
342 struct ldlm_request *dlm_req;
343 struct ldlm_reply *dlm_rep;
344 struct ldlm_lock *lock;
345 int rc, size = sizeof(*dlm_rep);
348 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
350 CERROR("out of memory\n");
353 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
354 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
355 dlm_rep->lock_flags = dlm_req->lock_flags;
357 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
359 req->rq_status = EINVAL;
361 LDLM_DEBUG(lock, "server-side convert handler START");
362 ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
363 &dlm_rep->lock_flags);
364 if (ldlm_del_waiting_lock(lock))
365 CDEBUG(D_DLMTRACE, "converted waiting lock %p\n", lock);
370 ldlm_reprocess_all(lock->l_resource);
371 LDLM_DEBUG(lock, "server-side convert handler END");
374 LDLM_DEBUG_NOLOCK("server-side convert handler END");
379 int ldlm_handle_cancel(struct ptlrpc_request *req)
381 struct ldlm_request *dlm_req;
382 struct ldlm_lock *lock;
386 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
388 CERROR("out of memory\n");
391 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
393 CERROR("bad request buffer for cancel\n");
397 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
399 CERROR("received cancel for unknown lock cookie "LPX64"\n",
400 dlm_req->lock_handle1.cookie);
401 LDLM_DEBUG_NOLOCK("server-side cancel handler stale lock "
403 dlm_req->lock_handle1.cookie);
404 req->rq_status = ESTALE;
406 LDLM_DEBUG(lock, "server-side cancel handler START");
407 ldlm_lock_cancel(lock);
408 if (ldlm_del_waiting_lock(lock))
409 CDEBUG(D_DLMTRACE, "cancelled waiting lock %p\n", lock);
413 if (ptlrpc_reply(req->rq_svc, req) != 0)
417 ldlm_reprocess_all(lock->l_resource);
418 LDLM_DEBUG(lock, "server-side cancel handler END");
425 struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *ns,
426 struct lustre_handle *handle);
428 static int ldlm_handle_bl_callback(struct ptlrpc_request *req,
429 struct ldlm_namespace *ns)
431 struct ldlm_request *dlm_req;
432 struct ldlm_lock *lock;
436 OBD_FAIL_RETURN(OBD_FAIL_OSC_LOCK_BL_AST, 0);
438 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
440 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
442 CERROR("blocking callback on lock "LPX64" - lock disappeared\n",
443 dlm_req->lock_handle1.cookie);
447 LDLM_DEBUG(lock, "client blocking AST callback handler START");
449 l_lock(&lock->l_resource->lr_namespace->ns_lock);
450 lock->l_flags |= LDLM_FL_CBPENDING;
451 do_ast = (!lock->l_readers && !lock->l_writers);
452 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
455 LDLM_DEBUG(lock, "already unused, calling "
456 "callback (%p)", lock->l_blocking_ast);
457 if (lock->l_blocking_ast != NULL) {
458 lock->l_blocking_ast(lock, &dlm_req->lock_desc,
459 lock->l_data, LDLM_CB_BLOCKING);
462 LDLM_DEBUG(lock, "Lock still has references, will be"
465 LDLM_DEBUG(lock, "client blocking callback handler END");
470 static int ldlm_handle_cp_callback(struct ptlrpc_request *req,
471 struct ldlm_namespace *ns)
473 struct list_head ast_list = LIST_HEAD_INIT(ast_list);
474 struct ldlm_request *dlm_req;
475 struct ldlm_lock *lock;
478 OBD_FAIL_RETURN(OBD_FAIL_OSC_LOCK_CP_AST, 0);
480 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
482 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
484 CERROR("completion callback on lock "LPX64" - lock "
485 "disappeared\n", dlm_req->lock_handle1.cookie);
489 LDLM_DEBUG(lock, "client completion callback handler START");
491 l_lock(&ns->ns_lock);
493 /* If we receive the completion AST before the actual enqueue returned,
494 * then we might need to switch lock modes, resources, or extents. */
495 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
496 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
497 LDLM_DEBUG(lock, "completion AST, new lock mode");
499 if (lock->l_resource->lr_type == LDLM_EXTENT)
500 memcpy(&lock->l_extent, &dlm_req->lock_desc.l_extent,
501 sizeof(lock->l_extent));
502 ldlm_resource_unlink_lock(lock);
503 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
504 &lock->l_resource->lr_name,
505 sizeof(lock->l_resource->lr_name)) != 0) {
506 ldlm_lock_change_resource(ns, lock,
507 dlm_req->lock_desc.l_resource.lr_name);
508 LDLM_DEBUG(lock, "completion AST, new resource");
510 lock->l_resource->lr_tmp = &ast_list;
511 ldlm_grant_lock(lock, req, sizeof(*req));
512 lock->l_resource->lr_tmp = NULL;
513 l_unlock(&ns->ns_lock);
514 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
517 ldlm_run_ast_work(&ast_list);
519 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
524 static int ldlm_callback_handler(struct ptlrpc_request *req)
526 struct ldlm_namespace *ns;
530 rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
532 CERROR("Invalid request: %d\n", rc);
536 if (req->rq_export == NULL) {
537 struct ldlm_request *dlm_req;
539 CERROR("operation %d with bad export (ptl req %d/rep %d)\n",
540 req->rq_reqmsg->opc, req->rq_request_portal,
541 req->rq_reply_portal);
542 CERROR("--> export addr: "LPX64", cookie: "LPX64"\n",
543 req->rq_reqmsg->addr, req->rq_reqmsg->cookie);
544 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
545 CERROR("--> lock addr: "LPX64", cookie: "LPX64"\n",
546 dlm_req->lock_handle1.addr,dlm_req->lock_handle1.cookie);
550 LASSERT(req->rq_export != NULL);
551 LASSERT(req->rq_export->exp_obd != NULL);
552 ns = req->rq_export->exp_obd->obd_namespace;
555 switch (req->rq_reqmsg->opc) {
556 case LDLM_BL_CALLBACK:
557 CDEBUG(D_INODE, "blocking ast\n");
558 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
559 rc = ldlm_handle_bl_callback(req, ns);
561 case LDLM_CP_CALLBACK:
562 CDEBUG(D_INODE, "completion ast\n");
563 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CP_CALLBACK, 0);
564 rc = ldlm_handle_cp_callback(req, ns);
567 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
573 ptlrpc_error(req->rq_svc, req);
575 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen,
579 ptlrpc_reply(req->rq_svc, req);
585 static int ldlm_cancel_handler(struct ptlrpc_request *req)
590 rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
592 CERROR("lustre_ldlm: Invalid request: %d\n", rc);
596 if (req->rq_export == NULL) {
597 struct ldlm_request *dlm_req;
598 CERROR("operation %d with bad export (ptl req %d/rep %d)\n",
599 req->rq_reqmsg->opc, req->rq_request_portal,
600 req->rq_reply_portal);
601 CERROR("--> export addr: "LPX64", cookie: "LPX64"\n",
602 req->rq_reqmsg->addr, req->rq_reqmsg->cookie);
603 dlm_req = lustre_msg_buf(req->rq_reqmsg, 0);
604 ldlm_lock_dump_handle(D_ERROR, &dlm_req->lock_handle1);
605 CERROR("--> ignoring this error as a temporary workaround! "
610 switch (req->rq_reqmsg->opc) {
612 /* XXX FIXME move this back to mds/handler.c, bug 625069 */
614 CDEBUG(D_INODE, "cancel\n");
615 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
616 rc = ldlm_handle_cancel(req);
622 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
629 static int ldlm_iocontrol(unsigned int cmd, struct lustre_handle *conn, int len,
630 void *karg, void *uarg)
632 struct obd_device *obddev = class_conn2obd(conn);
633 struct ptlrpc_connection *connection;
634 struct obd_uuid uuid = { "ldlm" };
638 if (_IOC_TYPE(cmd) != IOC_LDLM_TYPE || _IOC_NR(cmd) < IOC_LDLM_MIN_NR ||
639 _IOC_NR(cmd) > IOC_LDLM_MAX_NR) {
640 CDEBUG(D_IOCTL, "invalid ioctl (type %d, nr %d, size %d)\n",
641 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
645 OBD_ALLOC(obddev->u.ldlm.ldlm_client,
646 sizeof(*obddev->u.ldlm.ldlm_client));
647 connection = ptlrpc_uuid_to_connection(&uuid);
649 CERROR("No LDLM UUID found: assuming ldlm is local.\n");
653 //err = ldlm_test(obddev, conn);
655 CERROR("-- NO TESTS WERE RUN done err %d\n", err);
658 ldlm_dump_all_namespaces();
661 GOTO(out, err = -EINVAL);
666 ptlrpc_put_connection(connection);
667 OBD_FREE(obddev->u.ldlm.ldlm_client,
668 sizeof(*obddev->u.ldlm.ldlm_client));
672 static int ldlm_setup(struct obd_device *obddev, obd_count len, void *buf)
674 struct ldlm_obd *ldlm = &obddev->u.ldlm;
675 struct obd_uuid uuid = {"self"};
679 if (ldlm_already_setup)
682 rc = ldlm_proc_setup(obddev);
686 ldlm->ldlm_cb_service =
687 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
688 LDLM_MAXREQSIZE, LDLM_CB_REQUEST_PORTAL,
689 LDLM_CB_REPLY_PORTAL, &uuid,
690 ldlm_callback_handler, "ldlm_cbd");
692 if (!ldlm->ldlm_cb_service) {
693 CERROR("failed to start service\n");
694 GOTO(out_proc, rc = -ENOMEM);
697 ldlm->ldlm_cancel_service =
698 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
699 LDLM_MAXREQSIZE, LDLM_CANCEL_REQUEST_PORTAL,
700 LDLM_CANCEL_REPLY_PORTAL, &uuid,
701 ldlm_cancel_handler, "ldlm_canceld");
703 if (!ldlm->ldlm_cancel_service) {
704 CERROR("failed to start service\n");
705 GOTO(out_proc, rc = -ENOMEM);
708 for (i = 0; i < LDLM_NUM_THREADS; i++) {
710 sprintf(name, "ldlm_cn_%02d", i);
711 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cancel_service,
714 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
716 GOTO(out_thread, rc);
720 for (i = 0; i < LDLM_NUM_THREADS; i++) {
722 sprintf(name, "ldlm_cb_%02d", i);
723 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cb_service, name);
725 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
727 GOTO(out_thread, rc);
731 INIT_LIST_HEAD(&waiting_locks_list);
732 spin_lock_init(&waiting_locks_spinlock);
733 waiting_locks_timer.function = waiting_locks_callback;
734 waiting_locks_timer.data = 0;
735 init_timer(&waiting_locks_timer);
737 ldlm_already_setup = 1;
742 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
743 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
744 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
745 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
748 ldlm_proc_cleanup(obddev);
753 static int ldlm_cleanup(struct obd_device *obddev)
755 struct ldlm_obd *ldlm = &obddev->u.ldlm;
758 if (!list_empty(&ldlm_namespace_list)) {
759 CERROR("ldlm still has namespaces; clean these up first.\n");
763 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
764 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
765 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
766 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
767 ldlm_proc_cleanup(obddev);
769 ldlm_already_setup = 0;
773 static int ldlm_connect(struct lustre_handle *conn, struct obd_device *src,
774 struct obd_uuid *cluuid, struct recovd_obd *recovd,
775 ptlrpc_recovery_cb_t recover)
777 return class_connect(conn, src, cluuid);
780 struct obd_ops ldlm_obd_ops = {
781 o_owner: THIS_MODULE,
782 o_iocontrol: ldlm_iocontrol,
784 o_cleanup: ldlm_cleanup,
785 o_connect: ldlm_connect,
786 o_disconnect: class_disconnect
789 static int __init ldlm_init(void)
791 int rc = class_register_type(&ldlm_obd_ops, 0, OBD_LDLM_DEVICENAME);
795 ldlm_resource_slab = kmem_cache_create("ldlm_resources",
796 sizeof(struct ldlm_resource), 0,
797 SLAB_HWCACHE_ALIGN, NULL, NULL);
798 if (ldlm_resource_slab == NULL)
801 ldlm_lock_slab = kmem_cache_create("ldlm_locks",
802 sizeof(struct ldlm_lock), 0,
803 SLAB_HWCACHE_ALIGN, NULL, NULL);
804 if (ldlm_lock_slab == NULL) {
805 kmem_cache_destroy(ldlm_resource_slab);
809 l_lock_init(&ldlm_handle_lock);
814 static void __exit ldlm_exit(void)
816 class_unregister_type(OBD_LDLM_DEVICENAME);
817 if (kmem_cache_destroy(ldlm_resource_slab) != 0)
818 CERROR("couldn't free ldlm resource slab\n");
819 if (kmem_cache_destroy(ldlm_lock_slab) != 0)
820 CERROR("couldn't free ldlm lock slab\n");
824 EXPORT_SYMBOL(ldlm_lock2desc);
825 EXPORT_SYMBOL(ldlm_register_intent);
826 EXPORT_SYMBOL(ldlm_unregister_intent);
827 EXPORT_SYMBOL(ldlm_lockname);
828 EXPORT_SYMBOL(ldlm_typename);
829 EXPORT_SYMBOL(ldlm_lock2handle);
830 EXPORT_SYMBOL(__ldlm_handle2lock);
831 EXPORT_SYMBOL(ldlm_lock_put);
832 EXPORT_SYMBOL(ldlm_lock_match);
833 EXPORT_SYMBOL(ldlm_lock_cancel);
834 EXPORT_SYMBOL(ldlm_lock_addref);
835 EXPORT_SYMBOL(ldlm_lock_decref);
836 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
837 EXPORT_SYMBOL(ldlm_lock_change_resource);
838 EXPORT_SYMBOL(ldlm_lock_set_data);
839 EXPORT_SYMBOL(ldlm_it2str);
840 EXPORT_SYMBOL(ldlm_lock_dump);
841 EXPORT_SYMBOL(ldlm_lock_dump_handle);
842 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
843 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
846 EXPORT_SYMBOL(ldlm_completion_ast);
847 EXPORT_SYMBOL(ldlm_expired_completion_wait);
848 EXPORT_SYMBOL(ldlm_cli_convert);
849 EXPORT_SYMBOL(ldlm_cli_enqueue);
850 EXPORT_SYMBOL(ldlm_cli_cancel);
851 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
852 EXPORT_SYMBOL(ldlm_match_or_enqueue);
853 EXPORT_SYMBOL(ldlm_replay_locks);
854 EXPORT_SYMBOL(ldlm_resource_foreach);
855 EXPORT_SYMBOL(ldlm_namespace_foreach);
856 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
859 EXPORT_SYMBOL(ldlm_server_blocking_ast);
860 EXPORT_SYMBOL(ldlm_server_completion_ast);
861 EXPORT_SYMBOL(ldlm_handle_enqueue);
862 EXPORT_SYMBOL(ldlm_handle_cancel);
863 EXPORT_SYMBOL(ldlm_handle_convert);
864 EXPORT_SYMBOL(ldlm_del_waiting_lock);
868 EXPORT_SYMBOL(ldlm_test);
869 EXPORT_SYMBOL(ldlm_regression_start);
870 EXPORT_SYMBOL(ldlm_regression_stop);
873 /* ldlm_resource.c */
874 EXPORT_SYMBOL(ldlm_namespace_new);
875 EXPORT_SYMBOL(ldlm_namespace_cleanup);
876 EXPORT_SYMBOL(ldlm_namespace_free);
877 EXPORT_SYMBOL(ldlm_namespace_dump);
880 EXPORT_SYMBOL(l_lock);
881 EXPORT_SYMBOL(l_unlock);
883 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
884 MODULE_DESCRIPTION("Lustre Lock Management Module v0.1");
885 MODULE_LICENSE("GPL");
887 module_init(ldlm_init);
888 module_exit(ldlm_exit);