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
28 # include <linux/module.h>
29 # include <linux/slab.h>
30 # include <linux/init.h>
31 # include <linux/wait.h>
33 # include <liblustre.h>
36 #include <linux/lustre_dlm.h>
37 #include <linux/obd_class.h>
38 extern kmem_cache_t *ldlm_resource_slab;
39 extern kmem_cache_t *ldlm_lock_slab;
40 extern struct lustre_lock ldlm_handle_lock;
41 extern struct list_head ldlm_namespace_list;
42 extern int (*mds_reint_p)(int offset, struct ptlrpc_request *req);
43 extern int (*mds_getattr_name_p)(int offset, struct ptlrpc_request *req);
45 static int ldlm_already_setup = 0;
49 inline unsigned long round_timeout(unsigned long timeout)
51 return ((timeout / HZ) + 1) * HZ;
54 /* XXX should this be per-ldlm? */
55 static struct list_head waiting_locks_list;
56 static spinlock_t waiting_locks_spinlock;
57 static struct timer_list waiting_locks_timer;
59 static struct expired_lock_thread {
60 wait_queue_head_t elt_waitq;
62 struct list_head elt_expired_locks;
64 } expired_lock_thread;
68 #define ELT_TERMINATE 2
70 static inline int have_expired_locks(void)
74 spin_lock_bh(&expired_lock_thread.elt_lock);
75 need_to_run = !list_empty(&expired_lock_thread.elt_expired_locks);
76 spin_unlock_bh(&expired_lock_thread.elt_lock);
81 static int expired_lock_main(void *arg)
83 struct list_head *expired = &expired_lock_thread.elt_expired_locks;
84 struct l_wait_info lwi = { 0 };
89 kportal_daemonize("ldlm_elt");
91 SIGNAL_MASK_LOCK(current, flags);
92 sigfillset(¤t->blocked);
94 SIGNAL_MASK_UNLOCK(current, flags);
98 expired_lock_thread.elt_state = ELT_READY;
99 wake_up(&expired_lock_thread.elt_waitq);
102 l_wait_event(expired_lock_thread.elt_waitq,
103 have_expired_locks() ||
104 expired_lock_thread.elt_state == ELT_TERMINATE,
107 spin_lock_bh(&expired_lock_thread.elt_lock);
108 while (!list_empty(expired)) {
109 struct ldlm_lock *lock = list_entry(expired->next,
112 spin_unlock_bh(&expired_lock_thread.elt_lock);
114 ptlrpc_fail_export(lock->l_export);
116 spin_lock_bh(&expired_lock_thread.elt_lock);
118 spin_unlock_bh(&expired_lock_thread.elt_lock);
120 if (expired_lock_thread.elt_state == ELT_TERMINATE)
124 expired_lock_thread.elt_state = ELT_STOPPED;
125 wake_up(&expired_lock_thread.elt_waitq);
129 static void waiting_locks_callback(unsigned long unused)
131 struct ldlm_lock *lock;
133 spin_lock_bh(&waiting_locks_spinlock);
134 while (!list_empty(&waiting_locks_list)) {
135 lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
138 if (lock->l_callback_timeout > jiffies)
141 LDLM_ERROR(lock, "lock callback timer expired: evicting client "
143 lock->l_export->exp_client_uuid.uuid,
144 lock->l_export->exp_connection->c_remote_uuid.uuid,
145 lock->l_export->exp_connection->c_peer.peer_nid);
147 spin_lock_bh(&expired_lock_thread.elt_lock);
148 list_del(&lock->l_pending_chain);
149 list_add(&lock->l_pending_chain,
150 &expired_lock_thread.elt_expired_locks);
151 spin_unlock_bh(&expired_lock_thread.elt_lock);
152 wake_up(&expired_lock_thread.elt_waitq);
155 spin_unlock_bh(&waiting_locks_spinlock);
159 * Indicate that we're waiting for a client to call us back cancelling a given
160 * lock. We add it to the pending-callback chain, and schedule the lock-timeout
161 * timer to fire appropriately. (We round up to the next second, to avoid
162 * floods of timer firings during periods of high lock contention and traffic).
164 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
166 unsigned long timeout_rounded;
168 LDLM_DEBUG(lock, "adding to wait list");
169 LASSERT(list_empty(&lock->l_pending_chain));
171 spin_lock_bh(&waiting_locks_spinlock);
172 lock->l_callback_timeout = jiffies + (obd_timeout * HZ / 2);
174 timeout_rounded = round_timeout(lock->l_callback_timeout);
176 if (timeout_rounded < waiting_locks_timer.expires ||
177 !timer_pending(&waiting_locks_timer)) {
178 mod_timer(&waiting_locks_timer, timeout_rounded);
180 list_add_tail(&lock->l_pending_chain, &waiting_locks_list); /* FIFO */
181 spin_unlock_bh(&waiting_locks_spinlock);
186 * Remove a lock from the pending list, likely because it had its cancellation
187 * callback arrive without incident. This adjusts the lock-timeout timer if
188 * needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
190 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
192 struct list_head *list_next;
194 if (lock->l_export == NULL) {
195 /* We don't have a "waiting locks list" on clients. */
196 LDLM_DEBUG(lock, "client lock: no-op");
200 spin_lock_bh(&waiting_locks_spinlock);
202 if (list_empty(&lock->l_pending_chain)) {
203 spin_unlock_bh(&waiting_locks_spinlock);
204 LDLM_DEBUG(lock, "wasn't waiting");
208 list_next = lock->l_pending_chain.next;
209 if (lock->l_pending_chain.prev == &waiting_locks_list) {
210 /* Removing the head of the list, adjust timer. */
211 if (list_next == &waiting_locks_list) {
212 /* No more, just cancel. */
213 del_timer(&waiting_locks_timer);
215 struct ldlm_lock *next;
216 next = list_entry(list_next, struct ldlm_lock,
218 mod_timer(&waiting_locks_timer,
219 round_timeout(next->l_callback_timeout));
222 list_del_init(&lock->l_pending_chain);
223 spin_unlock_bh(&waiting_locks_spinlock);
224 LDLM_DEBUG(lock, "removed");
228 #else /* !__KERNEL__ */
230 static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
235 int ldlm_del_waiting_lock(struct ldlm_lock *lock)
240 #endif /* __KERNEL__ */
242 static void ldlm_failed_ast(struct ldlm_lock *lock, int rc, char *ast_type)
244 CERROR("%s AST failed (%d) for res "LPU64"/"LPU64
245 ", mode %s: evicting client %s@%s NID "LPU64"\n",
247 lock->l_resource->lr_name.name[0],
248 lock->l_resource->lr_name.name[1],
249 ldlm_lockname[lock->l_granted_mode],
250 lock->l_export->exp_client_uuid.uuid,
251 lock->l_export->exp_connection->c_remote_uuid.uuid,
252 lock->l_export->exp_connection->c_peer.peer_nid);
253 ptlrpc_fail_export(lock->l_export);
256 int ldlm_server_blocking_ast(struct ldlm_lock *lock,
257 struct ldlm_lock_desc *desc,
258 void *data, int flag)
260 struct ldlm_request *body;
261 struct ptlrpc_request *req;
262 int rc = 0, size = sizeof(*body);
265 if (flag == LDLM_CB_CANCELING) {
266 /* Don't need to do anything here. */
272 l_lock(&lock->l_resource->lr_namespace->ns_lock);
273 /* XXX This is necessary because, with the lock re-tasking, we actually
274 * _can_ get called in here twice. (bug 830) */
275 if (!list_empty(&lock->l_pending_chain)) {
276 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
280 if (lock->l_destroyed) {
281 /* What's the point? */
282 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
287 if (LTIME_S(CURRENT_TIME) - lock->l_export->exp_last_request_time > 30){
288 ldlm_failed_ast(lock, -ETIMEDOUT, "Not-attempted blocking");
293 req = ptlrpc_prep_req(lock->l_export->exp_ldlm_data.led_import,
294 LDLM_BL_CALLBACK, 1, &size, NULL);
298 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
299 memcpy(&body->lock_handle1, &lock->l_remote_handle,
300 sizeof(body->lock_handle1));
301 memcpy(&body->lock_desc, desc, sizeof(*desc));
303 LDLM_DEBUG(lock, "server preparing blocking AST");
304 req->rq_replen = lustre_msg_size(0, NULL);
306 ldlm_add_waiting_lock(lock);
307 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
309 req->rq_level = LUSTRE_CONN_RECOVER;
310 req->rq_timeout = 2; /* 2 second timeout for initial AST reply */
311 rc = ptlrpc_queue_wait(req);
312 if (rc == -ETIMEDOUT || rc == -EINTR) {
313 ldlm_del_waiting_lock(lock);
314 ldlm_failed_ast(lock, rc, "blocking");
317 CDEBUG(D_DLMTRACE, "client (nid "LPU64") returned %d "
318 "from blocking AST for lock %p--normal race\n",
319 req->rq_connection->c_peer.peer_nid,
320 req->rq_repmsg->status, lock);
321 else if (rc == -ENOTCONN)
322 CDEBUG(D_DLMTRACE, "client (nid "LPU64") returned %d "
323 "from blocking AST for lock %p--this client was "
324 "probably rebooted while it held a lock, nothing"
325 " serious\n",req->rq_connection->c_peer.peer_nid,
326 req->rq_repmsg->status, lock);
328 CDEBUG(D_ERROR, "client (nid "LPU64") returned %d "
329 "from blocking AST for lock %p\n",
330 req->rq_connection->c_peer.peer_nid,
331 req->rq_repmsg->status, lock);
332 LDLM_DEBUG(lock, "client returned error %d from blocking AST",
334 ldlm_lock_cancel(lock);
335 /* Server-side AST functions are called from ldlm_reprocess_all,
336 * which needs to be told to please restart its reprocessing. */
340 ptlrpc_req_finished(req);
345 /* XXX copied from ptlrpc/service.c */
346 static long timeval_sub(struct timeval *large, struct timeval *small)
348 return (large->tv_sec - small->tv_sec) * 1000000 +
349 (large->tv_usec - small->tv_usec);
352 int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
354 struct ldlm_request *body;
355 struct ptlrpc_request *req;
356 struct timeval granted_time;
357 long total_enqueue_wait;
358 int rc = 0, size = sizeof(*body);
366 do_gettimeofday(&granted_time);
367 total_enqueue_wait = timeval_sub(&granted_time, &lock->l_enqueued_time);
369 if (total_enqueue_wait / 1000000 > obd_timeout)
370 LDLM_ERROR(lock, "enqueue wait took %ldus", total_enqueue_wait);
372 req = ptlrpc_prep_req(lock->l_export->exp_ldlm_data.led_import,
373 LDLM_CP_CALLBACK, 1, &size, NULL);
377 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
378 memcpy(&body->lock_handle1, &lock->l_remote_handle,
379 sizeof(body->lock_handle1));
380 body->lock_flags = flags;
381 ldlm_lock2desc(lock, &body->lock_desc);
383 LDLM_DEBUG(lock, "server preparing completion AST (after %ldus wait)",
385 req->rq_replen = lustre_msg_size(0, NULL);
387 req->rq_level = LUSTRE_CONN_RECOVER;
388 req->rq_timeout = 2; /* 2 second timeout for initial AST reply */
389 rc = ptlrpc_queue_wait(req);
390 if (rc == -ETIMEDOUT || rc == -EINTR) {
391 ldlm_del_waiting_lock(lock);
392 ldlm_failed_ast(lock, rc, "completion");
394 CERROR("client returned %d from completion AST for lock %p\n",
395 req->rq_status, lock);
396 LDLM_DEBUG(lock, "client returned error %d from completion AST",
398 ldlm_lock_cancel(lock);
399 /* Server-side AST functions are called from ldlm_reprocess_all,
400 * which needs to be told to please restart its reprocessing. */
403 ptlrpc_req_finished(req);
408 int ldlm_handle_enqueue(struct ptlrpc_request *req,
409 ldlm_completion_callback completion_callback,
410 ldlm_blocking_callback blocking_callback)
412 struct obd_device *obddev = req->rq_export->exp_obd;
413 struct ldlm_reply *dlm_rep;
414 struct ldlm_request *dlm_req;
415 int rc, size = sizeof(*dlm_rep), cookielen = 0;
418 struct ldlm_lock *lock = NULL;
422 LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
424 dlm_req = lustre_swab_reqbuf (req, 0, sizeof (*dlm_req),
425 lustre_swab_ldlm_request);
426 if (dlm_req == NULL) {
427 CERROR ("Can't unpack dlm_req\n");
431 flags = dlm_req->lock_flags;
432 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN &&
433 (flags & LDLM_FL_HAS_INTENT)) {
434 /* In this case, the reply buffer is allocated deep in
435 * local_lock_enqueue by the policy function. */
437 cookielen = sizeof(*req);
439 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen,
442 CERROR("out of memory\n");
445 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT) {
446 cookie = &dlm_req->lock_desc.l_extent;
447 cookielen = sizeof(struct ldlm_extent);
451 /* The lock's callback data might be set in the policy function */
452 lock = ldlm_lock_create(obddev->obd_namespace,
453 &dlm_req->lock_handle2,
454 dlm_req->lock_desc.l_resource.lr_name,
455 dlm_req->lock_desc.l_resource.lr_type,
456 dlm_req->lock_desc.l_req_mode,
457 blocking_callback, NULL);
459 GOTO(out, err = -ENOMEM);
461 do_gettimeofday(&lock->l_enqueued_time);
462 memcpy(&lock->l_remote_handle, &dlm_req->lock_handle1,
463 sizeof(lock->l_remote_handle));
464 LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
466 LASSERT(req->rq_export);
467 lock->l_export = class_export_get(req->rq_export);
468 l_lock(&lock->l_resource->lr_namespace->ns_lock);
469 list_add(&lock->l_export_chain,
470 &lock->l_export->exp_ldlm_data.led_held_locks);
471 l_unlock(&lock->l_resource->lr_namespace->ns_lock);
473 err = ldlm_lock_enqueue(obddev->obd_namespace, &lock, cookie, cookielen,
474 &flags, completion_callback);
478 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*dlm_rep));
479 dlm_rep->lock_flags = flags;
481 ldlm_lock2handle(lock, &dlm_rep->lock_handle);
482 if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
483 memcpy(&dlm_rep->lock_extent, &lock->l_extent,
484 sizeof(lock->l_extent));
485 if (dlm_rep->lock_flags & LDLM_FL_LOCK_CHANGED) {
486 memcpy(&dlm_rep->lock_resource_name, &lock->l_resource->lr_name,
487 sizeof(dlm_rep->lock_resource_name));
488 dlm_rep->lock_mode = lock->l_req_mode;
494 LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
496 req->rq_status = err;
498 /* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
499 * ldlm_reprocess_all. If this moves, revisit that code. -phil */
502 ldlm_reprocess_all(lock->l_resource);
505 LDLM_DEBUG_NOLOCK("server-side enqueue handler END (lock %p)", lock);
510 int ldlm_handle_convert(struct ptlrpc_request *req)
512 struct ldlm_request *dlm_req;
513 struct ldlm_reply *dlm_rep;
514 struct ldlm_lock *lock;
515 int rc, size = sizeof(*dlm_rep);
518 dlm_req = lustre_swab_reqbuf (req, 0, sizeof (*dlm_req),
519 lustre_swab_ldlm_request);
520 if (dlm_req == NULL) {
521 CERROR ("Can't unpack dlm_req\n");
525 rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
527 CERROR("out of memory\n");
530 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*dlm_rep));
531 dlm_rep->lock_flags = dlm_req->lock_flags;
533 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
535 req->rq_status = EINVAL;
537 LDLM_DEBUG(lock, "server-side convert handler START");
538 ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
539 &dlm_rep->lock_flags);
540 if (ldlm_del_waiting_lock(lock))
541 CDEBUG(D_DLMTRACE, "converted waiting lock %p\n", lock);
546 ldlm_reprocess_all(lock->l_resource);
547 LDLM_DEBUG(lock, "server-side convert handler END");
550 LDLM_DEBUG_NOLOCK("server-side convert handler END");
555 int ldlm_handle_cancel(struct ptlrpc_request *req)
557 struct ldlm_request *dlm_req;
558 struct ldlm_lock *lock;
562 dlm_req = lustre_swab_reqbuf (req, 0, sizeof (*dlm_req),
563 lustre_swab_ldlm_request);
564 if (dlm_req == NULL) {
565 CERROR("bad request buffer for cancel\n");
569 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
571 CERROR("out of memory\n");
575 lock = ldlm_handle2lock(&dlm_req->lock_handle1);
577 CERROR("received cancel for unknown lock cookie "LPX64
578 " from nid "LPU64"\n", dlm_req->lock_handle1.cookie,
579 req->rq_connection->c_peer.peer_nid);
580 LDLM_DEBUG_NOLOCK("server-side cancel handler stale lock "
582 dlm_req->lock_handle1.cookie);
583 req->rq_status = ESTALE;
585 LDLM_DEBUG(lock, "server-side cancel handler START");
586 ldlm_lock_cancel(lock);
587 if (ldlm_del_waiting_lock(lock))
588 CDEBUG(D_DLMTRACE, "cancelled waiting lock %p\n", lock);
592 if (ptlrpc_reply(req) != 0)
596 ldlm_reprocess_all(lock->l_resource);
597 LDLM_DEBUG(lock, "server-side cancel handler END");
604 static void ldlm_handle_bl_callback(struct ptlrpc_request *req,
605 struct ldlm_namespace *ns,
606 struct ldlm_request *dlm_req,
607 struct ldlm_lock *lock)
612 l_lock(&ns->ns_lock);
613 LDLM_DEBUG(lock, "client blocking AST callback handler START");
615 lock->l_flags |= LDLM_FL_CBPENDING;
616 do_ast = (!lock->l_readers && !lock->l_writers);
619 LDLM_DEBUG(lock, "already unused, calling "
620 "callback (%p)", lock->l_blocking_ast);
621 if (lock->l_blocking_ast != NULL) {
622 l_unlock(&ns->ns_lock);
623 lock->l_blocking_ast(lock, &dlm_req->lock_desc,
624 lock->l_data, LDLM_CB_BLOCKING);
625 l_lock(&ns->ns_lock);
628 LDLM_DEBUG(lock, "Lock still has references, will be"
632 LDLM_DEBUG(lock, "client blocking callback handler END");
633 l_unlock(&ns->ns_lock);
638 static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
639 struct ldlm_namespace *ns,
640 struct ldlm_request *dlm_req,
641 struct ldlm_lock *lock)
646 l_lock(&ns->ns_lock);
647 LDLM_DEBUG(lock, "client completion callback handler START");
649 /* If we receive the completion AST before the actual enqueue returned,
650 * then we might need to switch lock modes, resources, or extents. */
651 if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
652 lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
653 LDLM_DEBUG(lock, "completion AST, new lock mode");
655 if (lock->l_resource->lr_type == LDLM_EXTENT)
656 memcpy(&lock->l_extent, &dlm_req->lock_desc.l_extent,
657 sizeof(lock->l_extent));
659 ldlm_resource_unlink_lock(lock);
660 if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
661 &lock->l_resource->lr_name,
662 sizeof(lock->l_resource->lr_name)) != 0) {
663 ldlm_lock_change_resource(ns, lock,
664 dlm_req->lock_desc.l_resource.lr_name);
665 LDLM_DEBUG(lock, "completion AST, new resource");
667 lock->l_resource->lr_tmp = &ast_list;
668 ldlm_grant_lock(lock, req, sizeof(*req));
669 lock->l_resource->lr_tmp = NULL;
670 LDLM_DEBUG(lock, "callback handler finished, about to run_ast_work");
671 l_unlock(&ns->ns_lock);
674 ldlm_run_ast_work(&ast_list);
676 LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
681 static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
684 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen,
688 return ptlrpc_reply(req);
691 static int ldlm_callback_handler(struct ptlrpc_request *req)
693 struct ldlm_namespace *ns;
694 struct ldlm_request *dlm_req;
695 struct ldlm_lock *lock;
698 /* Requests arrive in sender's byte order. The ptlrpc service
699 * handler has already checked and, if necessary, byte-swapped the
700 * incoming request message body, but I am responsible for the
701 * message buffers. */
703 if (req->rq_export == NULL) {
704 struct ldlm_request *dlm_req;
706 CDEBUG(D_RPCTRACE, "operation %d from nid "LPU64" with bad "
707 "export cookie "LPX64" (ptl req %d/rep %d); this is "
708 "normal if this node rebooted with a lock held\n",
709 req->rq_reqmsg->opc, req->rq_connection->c_peer.peer_nid,
710 req->rq_reqmsg->handle.cookie,
711 req->rq_request_portal, req->rq_reply_portal);
713 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
714 lustre_swab_ldlm_request);
716 CDEBUG(D_RPCTRACE, "--> lock cookie: "LPX64"\n",
717 dlm_req->lock_handle1.cookie);
719 ldlm_callback_reply(req, -ENOTCONN);
723 if (req->rq_reqmsg->opc == LDLM_BL_CALLBACK) {
724 OBD_FAIL_RETURN(OBD_FAIL_LDLM_BL_CALLBACK, 0);
725 } else if (req->rq_reqmsg->opc == LDLM_CP_CALLBACK) {
726 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CP_CALLBACK, 0);
728 ldlm_callback_reply(req, -EPROTO);
732 LASSERT(req->rq_export != NULL);
733 LASSERT(req->rq_export->exp_obd != NULL);
734 ns = req->rq_export->exp_obd->obd_namespace;
737 dlm_req = lustre_swab_reqbuf (req, 0, sizeof (*dlm_req),
738 lustre_swab_ldlm_request);
739 if (dlm_req == NULL) {
740 CERROR ("can't unpack dlm_req\n");
741 ldlm_callback_reply (req, -EPROTO);
745 lock = ldlm_handle2lock_ns(ns, &dlm_req->lock_handle1);
747 CDEBUG(D_INODE, "callback on lock "LPX64" - lock disappeared\n",
748 dlm_req->lock_handle1.cookie);
749 ldlm_callback_reply(req, -EINVAL);
753 /* we want the ost thread to get this reply so that it can respond
754 * to ost requests (write cache writeback) that might be triggered
756 ldlm_callback_reply(req, 0);
758 switch (req->rq_reqmsg->opc) {
759 case LDLM_BL_CALLBACK:
760 CDEBUG(D_INODE, "blocking ast\n");
761 ldlm_handle_bl_callback(req, ns, dlm_req, lock);
763 case LDLM_CP_CALLBACK:
764 CDEBUG(D_INODE, "completion ast\n");
765 ldlm_handle_cp_callback(req, ns, dlm_req, lock);
768 LBUG(); /* checked above */
774 static int ldlm_cancel_handler(struct ptlrpc_request *req)
779 /* Requests arrive in sender's byte order. The ptlrpc service
780 * handler has already checked and, if necessary, byte-swapped the
781 * incoming request message body, but I am responsible for the
782 * message buffers. */
784 if (req->rq_export == NULL) {
785 struct ldlm_request *dlm_req;
786 CERROR("operation %d with bad export (ptl req %d/rep %d)\n",
787 req->rq_reqmsg->opc, req->rq_request_portal,
788 req->rq_reply_portal);
789 CERROR("--> export cookie: "LPX64"\n",
790 req->rq_reqmsg->handle.cookie);
791 dlm_req = lustre_swab_reqbuf(req, 0, sizeof (*dlm_req),
792 lustre_swab_ldlm_request);
794 ldlm_lock_dump_handle(D_ERROR, &dlm_req->lock_handle1);
798 switch (req->rq_reqmsg->opc) {
800 /* XXX FIXME move this back to mds/handler.c, bug 249 */
802 CDEBUG(D_INODE, "cancel\n");
803 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
804 rc = ldlm_handle_cancel(req);
810 CERROR("invalid opcode %d\n", req->rq_reqmsg->opc);
817 static int ldlm_iocontrol(unsigned int cmd, struct lustre_handle *conn, int len,
818 void *karg, void *uarg)
820 struct obd_device *obddev = class_conn2obd(conn);
821 struct ptlrpc_connection *connection;
822 struct obd_uuid uuid = { "ldlm" };
826 if (_IOC_TYPE(cmd) != IOC_LDLM_TYPE || _IOC_NR(cmd) < IOC_LDLM_MIN_NR ||
827 _IOC_NR(cmd) > IOC_LDLM_MAX_NR) {
828 CDEBUG(D_IOCTL, "invalid ioctl (type %d, nr %d, size %d)\n",
829 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
833 OBD_ALLOC(obddev->u.ldlm.ldlm_client,
834 sizeof(*obddev->u.ldlm.ldlm_client));
835 connection = ptlrpc_uuid_to_connection(&uuid);
837 CERROR("No LDLM UUID found: assuming ldlm is local.\n");
841 //err = ldlm_test(obddev, conn);
843 CERROR("-- NO TESTS WERE RUN done err %d\n", err);
846 ldlm_dump_all_namespaces();
849 GOTO(out, err = -EINVAL);
854 ptlrpc_put_connection(connection);
855 OBD_FREE(obddev->u.ldlm.ldlm_client,
856 sizeof(*obddev->u.ldlm.ldlm_client));
860 static int ldlm_setup(struct obd_device *obddev, obd_count len, void *buf)
862 struct ldlm_obd *ldlm = &obddev->u.ldlm;
866 if (ldlm_already_setup)
869 rc = ldlm_proc_setup(obddev);
874 inter_module_register("ldlm_cli_cancel_unused", THIS_MODULE,
875 ldlm_cli_cancel_unused);
876 inter_module_register("ldlm_namespace_cleanup", THIS_MODULE,
877 ldlm_namespace_cleanup);
878 inter_module_register("ldlm_replay_locks", THIS_MODULE,
881 ldlm->ldlm_cb_service =
882 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
883 LDLM_MAXREQSIZE, LDLM_CB_REQUEST_PORTAL,
884 LDLM_CB_REPLY_PORTAL,
885 ldlm_callback_handler, "ldlm_cbd", obddev);
887 if (!ldlm->ldlm_cb_service) {
888 CERROR("failed to start service\n");
889 GOTO(out_proc, rc = -ENOMEM);
892 ldlm->ldlm_cancel_service =
893 ptlrpc_init_svc(LDLM_NEVENTS, LDLM_NBUFS, LDLM_BUFSIZE,
894 LDLM_MAXREQSIZE, LDLM_CANCEL_REQUEST_PORTAL,
895 LDLM_CANCEL_REPLY_PORTAL,
896 ldlm_cancel_handler, "ldlm_canceld", obddev);
898 if (!ldlm->ldlm_cancel_service) {
899 CERROR("failed to start service\n");
900 GOTO(out_proc, rc = -ENOMEM);
903 for (i = 0; i < LDLM_NUM_THREADS; i++) {
905 sprintf(name, "ldlm_cn_%02d", i);
906 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cancel_service,
909 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
911 GOTO(out_thread, rc);
915 for (i = 0; i < LDLM_NUM_THREADS; i++) {
917 sprintf(name, "ldlm_cb_%02d", i);
918 rc = ptlrpc_start_thread(obddev, ldlm->ldlm_cb_service, name);
920 CERROR("cannot start LDLM thread #%d: rc %d\n", i, rc);
922 GOTO(out_thread, rc);
926 INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
927 spin_lock_init(&expired_lock_thread.elt_lock);
928 expired_lock_thread.elt_state = ELT_STOPPED;
929 init_waitqueue_head(&expired_lock_thread.elt_waitq);
931 rc = kernel_thread(expired_lock_main, NULL, CLONE_VM | CLONE_FS);
933 CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
934 GOTO(out_thread, rc);
937 wait_event(expired_lock_thread.elt_waitq,
938 expired_lock_thread.elt_state == ELT_READY);
940 INIT_LIST_HEAD(&waiting_locks_list);
941 spin_lock_init(&waiting_locks_spinlock);
942 waiting_locks_timer.function = waiting_locks_callback;
943 waiting_locks_timer.data = 0;
944 init_timer(&waiting_locks_timer);
947 ldlm_already_setup = 1;
953 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
954 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
955 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
956 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
959 ldlm_proc_cleanup(obddev);
964 static int ldlm_cleanup(struct obd_device *obddev, int flags)
966 struct ldlm_obd *ldlm = &obddev->u.ldlm;
969 if (!list_empty(&ldlm_namespace_list)) {
970 CERROR("ldlm still has namespaces; clean these up first.\n");
971 ldlm_dump_all_namespaces();
976 if (flags & OBD_OPT_FORCE) {
977 ptlrpc_put_ldlm_hooks();
978 } else if (ptlrpc_ldlm_hooks_referenced()) {
979 CERROR("Some connections weren't cleaned up; run lconf with "
980 "--force to forcibly unload.\n");
981 ptlrpc_dump_connections();
985 ptlrpc_stop_all_threads(ldlm->ldlm_cb_service);
986 ptlrpc_unregister_service(ldlm->ldlm_cb_service);
987 ptlrpc_stop_all_threads(ldlm->ldlm_cancel_service);
988 ptlrpc_unregister_service(ldlm->ldlm_cancel_service);
989 ldlm_proc_cleanup(obddev);
991 expired_lock_thread.elt_state = ELT_TERMINATE;
992 wake_up(&expired_lock_thread.elt_waitq);
993 wait_event(expired_lock_thread.elt_waitq,
994 expired_lock_thread.elt_state == ELT_STOPPED);
996 inter_module_unregister("ldlm_namespace_cleanup");
997 inter_module_unregister("ldlm_cli_cancel_unused");
998 inter_module_unregister("ldlm_replay_locks");
1001 ldlm_already_setup = 0;
1005 static int ldlm_connect(struct lustre_handle *conn, struct obd_device *src,
1006 struct obd_uuid *cluuid)
1008 return class_connect(conn, src, cluuid);
1011 struct obd_ops ldlm_obd_ops = {
1012 o_owner: THIS_MODULE,
1013 o_iocontrol: ldlm_iocontrol,
1014 o_setup: ldlm_setup,
1015 o_cleanup: ldlm_cleanup,
1016 o_connect: ldlm_connect,
1017 o_disconnect: class_disconnect
1020 int __init ldlm_init(void)
1022 int rc = class_register_type(&ldlm_obd_ops, 0, OBD_LDLM_DEVICENAME);
1026 ldlm_resource_slab = kmem_cache_create("ldlm_resources",
1027 sizeof(struct ldlm_resource), 0,
1028 SLAB_HWCACHE_ALIGN, NULL, NULL);
1029 if (ldlm_resource_slab == NULL)
1032 ldlm_lock_slab = kmem_cache_create("ldlm_locks",
1033 sizeof(struct ldlm_lock), 0,
1034 SLAB_HWCACHE_ALIGN, NULL, NULL);
1035 if (ldlm_lock_slab == NULL) {
1036 kmem_cache_destroy(ldlm_resource_slab);
1040 l_lock_init(&ldlm_handle_lock);
1045 static void __exit ldlm_exit(void)
1047 class_unregister_type(OBD_LDLM_DEVICENAME);
1048 if (kmem_cache_destroy(ldlm_resource_slab) != 0)
1049 CERROR("couldn't free ldlm resource slab\n");
1050 if (kmem_cache_destroy(ldlm_lock_slab) != 0)
1051 CERROR("couldn't free ldlm lock slab\n");
1055 EXPORT_SYMBOL(ldlm_lock2desc);
1056 EXPORT_SYMBOL(ldlm_register_intent);
1057 EXPORT_SYMBOL(ldlm_unregister_intent);
1058 EXPORT_SYMBOL(ldlm_lockname);
1059 EXPORT_SYMBOL(ldlm_typename);
1060 EXPORT_SYMBOL(ldlm_lock2handle);
1061 EXPORT_SYMBOL(__ldlm_handle2lock);
1062 EXPORT_SYMBOL(ldlm_lock_put);
1063 EXPORT_SYMBOL(ldlm_lock_match);
1064 EXPORT_SYMBOL(ldlm_lock_cancel);
1065 EXPORT_SYMBOL(ldlm_lock_addref);
1066 EXPORT_SYMBOL(ldlm_lock_decref);
1067 EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
1068 EXPORT_SYMBOL(ldlm_lock_change_resource);
1069 EXPORT_SYMBOL(ldlm_lock_set_data);
1070 EXPORT_SYMBOL(ldlm_it2str);
1071 EXPORT_SYMBOL(ldlm_lock_dump);
1072 EXPORT_SYMBOL(ldlm_lock_dump_handle);
1073 EXPORT_SYMBOL(ldlm_cancel_locks_for_export);
1074 EXPORT_SYMBOL(ldlm_reprocess_all_ns);
1076 /* ldlm_request.c */
1077 EXPORT_SYMBOL(ldlm_completion_ast);
1078 EXPORT_SYMBOL(ldlm_expired_completion_wait);
1079 EXPORT_SYMBOL(ldlm_cli_convert);
1080 EXPORT_SYMBOL(ldlm_cli_enqueue);
1081 EXPORT_SYMBOL(ldlm_cli_cancel);
1082 EXPORT_SYMBOL(ldlm_cli_cancel_unused);
1083 EXPORT_SYMBOL(ldlm_replay_locks);
1084 EXPORT_SYMBOL(ldlm_resource_foreach);
1085 EXPORT_SYMBOL(ldlm_namespace_foreach);
1086 EXPORT_SYMBOL(ldlm_namespace_foreach_res);
1087 EXPORT_SYMBOL(ldlm_change_cbdata);
1090 EXPORT_SYMBOL(ldlm_server_blocking_ast);
1091 EXPORT_SYMBOL(ldlm_server_completion_ast);
1092 EXPORT_SYMBOL(ldlm_handle_enqueue);
1093 EXPORT_SYMBOL(ldlm_handle_cancel);
1094 EXPORT_SYMBOL(ldlm_handle_convert);
1095 EXPORT_SYMBOL(ldlm_del_waiting_lock);
1099 EXPORT_SYMBOL(ldlm_test);
1100 EXPORT_SYMBOL(ldlm_regression_start);
1101 EXPORT_SYMBOL(ldlm_regression_stop);
1104 /* ldlm_resource.c */
1105 EXPORT_SYMBOL(ldlm_namespace_new);
1106 EXPORT_SYMBOL(ldlm_namespace_cleanup);
1107 EXPORT_SYMBOL(ldlm_namespace_free);
1108 EXPORT_SYMBOL(ldlm_namespace_dump);
1111 EXPORT_SYMBOL(l_lock);
1112 EXPORT_SYMBOL(l_unlock);
1115 EXPORT_SYMBOL(client_import_connect);
1116 EXPORT_SYMBOL(client_import_disconnect);
1117 EXPORT_SYMBOL(target_abort_recovery);
1118 EXPORT_SYMBOL(target_handle_connect);
1119 EXPORT_SYMBOL(target_cancel_recovery_timer);
1120 EXPORT_SYMBOL(target_send_reply);
1121 EXPORT_SYMBOL(target_queue_recovery_request);
1122 EXPORT_SYMBOL(target_handle_ping);
1123 EXPORT_SYMBOL(target_handle_disconnect);
1124 EXPORT_SYMBOL(target_queue_final_reply);
1127 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1128 MODULE_DESCRIPTION("Lustre Lock Management Module v0.1");
1129 MODULE_LICENSE("GPL");
1131 module_init(ldlm_init);
1132 module_exit(ldlm_exit);