*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2010, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LDLM
-#ifdef __KERNEL__
-# include <libcfs/libcfs.h>
-#else
-# include <liblustre.h>
-#endif
-
+#include <linux/kthread.h>
+#include <linux/list.h>
+#include <libcfs/libcfs.h>
#include <lustre_dlm.h>
#include <obd_class.h>
-#include <libcfs/list.h>
#include "ldlm_internal.h"
static int ldlm_num_threads;
-CFS_MODULE_PARM(ldlm_num_threads, "i", int, 0444,
- "number of DLM service threads to start");
+module_param(ldlm_num_threads, int, 0444);
+MODULE_PARM_DESC(ldlm_num_threads, "number of DLM service threads to start");
static char *ldlm_cpts;
-CFS_MODULE_PARM(ldlm_cpts, "s", charp, 0444,
- "CPU partitions ldlm threads should run on");
+module_param(ldlm_cpts, charp, 0444);
+MODULE_PARM_DESC(ldlm_cpts, "CPU partitions ldlm threads should run on");
-extern cfs_mem_cache_t *ldlm_resource_slab;
-extern cfs_mem_cache_t *ldlm_lock_slab;
-static cfs_mutex_t ldlm_ref_mutex;
+static struct mutex ldlm_ref_mutex;
static int ldlm_refcount;
struct ldlm_cb_async_args {
static struct ldlm_state *ldlm_state;
-inline cfs_time_t round_timeout(cfs_time_t timeout)
+static inline cfs_time_t round_timeout(cfs_time_t timeout)
{
return cfs_time_seconds((int)cfs_duration_sec(cfs_time_sub(timeout, 0)) + 1);
}
#define ELT_TERMINATE 2
struct ldlm_bl_pool {
- cfs_spinlock_t blp_lock;
-
- /*
- * blp_prio_list is used for callbacks that should be handled
- * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
- * see bug 13843
- */
- cfs_list_t blp_prio_list;
-
- /*
- * blp_list is used for all other callbacks which are likely
- * to take longer to process.
- */
- cfs_list_t blp_list;
-
- cfs_waitq_t blp_waitq;
- cfs_completion_t blp_comp;
- cfs_atomic_t blp_num_threads;
- cfs_atomic_t blp_busy_threads;
- int blp_min_threads;
- int blp_max_threads;
+ spinlock_t blp_lock;
+
+ /*
+ * blp_prio_list is used for callbacks that should be handled
+ * as a priority. It is used for LDLM_FL_DISCARD_DATA requests.
+ * see bug 13843
+ */
+ struct list_head blp_prio_list;
+
+ /*
+ * blp_list is used for all other callbacks which are likely
+ * to take longer to process.
+ */
+ struct list_head blp_list;
+
+ wait_queue_head_t blp_waitq;
+ struct completion blp_comp;
+ atomic_t blp_num_threads;
+ atomic_t blp_busy_threads;
+ int blp_min_threads;
+ int blp_max_threads;
};
struct ldlm_bl_work_item {
- cfs_list_t blwi_entry;
- struct ldlm_namespace *blwi_ns;
- struct ldlm_lock_desc blwi_ld;
- struct ldlm_lock *blwi_lock;
- cfs_list_t blwi_head;
- int blwi_count;
- cfs_completion_t blwi_comp;
- int blwi_mode;
- int blwi_mem_pressure;
+ struct list_head blwi_entry;
+ struct ldlm_namespace *blwi_ns;
+ struct ldlm_lock_desc blwi_ld;
+ struct ldlm_lock *blwi_lock;
+ struct list_head blwi_head;
+ int blwi_count;
+ struct completion blwi_comp;
+ enum ldlm_cancel_flags blwi_flags;
+ int blwi_mem_pressure;
};
-#if defined(HAVE_SERVER_SUPPORT) && defined(__KERNEL__)
+#ifdef HAVE_SERVER_SUPPORT
+
+/**
+ * Protects both waiting_locks_list and expired_lock_thread.
+ */
+static spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
-/* w_l_spinlock protects both waiting_locks_list and expired_lock_thread */
-static cfs_spinlock_t waiting_locks_spinlock; /* BH lock (timer) */
-static cfs_list_t waiting_locks_list;
-static cfs_timer_t waiting_locks_timer;
+/**
+ * List for contended locks.
+ *
+ * As soon as a lock is contended, it gets placed on this list and
+ * expected time to get a response is filled in the lock. A special
+ * thread walks the list looking for locks that should be released and
+ * schedules client evictions for those that have not been released in
+ * time.
+ *
+ * All access to it should be under waiting_locks_spinlock.
+ */
+static struct list_head waiting_locks_list;
+static struct timer_list waiting_locks_timer;
static struct expired_lock_thread {
- cfs_waitq_t elt_waitq;
+ wait_queue_head_t elt_waitq;
int elt_state;
int elt_dump;
- cfs_list_t elt_expired_locks;
+ struct list_head elt_expired_locks;
} expired_lock_thread;
static inline int have_expired_locks(void)
{
- int need_to_run;
+ int need_to_run;
- ENTRY;
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- need_to_run = !cfs_list_empty(&expired_lock_thread.elt_expired_locks);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ ENTRY;
+ spin_lock_bh(&waiting_locks_spinlock);
+ need_to_run = !list_empty(&expired_lock_thread.elt_expired_locks);
+ spin_unlock_bh(&waiting_locks_spinlock);
- RETURN(need_to_run);
+ RETURN(need_to_run);
}
+/**
+ * Check expired lock list for expired locks and time them out.
+ */
static int expired_lock_main(void *arg)
{
- cfs_list_t *expired = &expired_lock_thread.elt_expired_locks;
- struct l_wait_info lwi = { 0 };
- int do_dump;
+ struct list_head *expired = &expired_lock_thread.elt_expired_locks;
+ struct l_wait_info lwi = { 0 };
+ int do_dump;
- ENTRY;
- cfs_daemonize("ldlm_elt");
-
- expired_lock_thread.elt_state = ELT_READY;
- cfs_waitq_signal(&expired_lock_thread.elt_waitq);
-
- while (1) {
- l_wait_event(expired_lock_thread.elt_waitq,
- have_expired_locks() ||
- expired_lock_thread.elt_state == ELT_TERMINATE,
- &lwi);
-
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- if (expired_lock_thread.elt_dump) {
- struct libcfs_debug_msg_data msgdata = {
- .msg_file = __FILE__,
- .msg_fn = "waiting_locks_callback",
- .msg_line = expired_lock_thread.elt_dump };
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
-
- /* from waiting_locks_callback, but not in timer */
- libcfs_debug_dumplog();
- libcfs_run_lbug_upcall(&msgdata);
-
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- expired_lock_thread.elt_dump = 0;
- }
+ ENTRY;
- do_dump = 0;
+ expired_lock_thread.elt_state = ELT_READY;
+ wake_up(&expired_lock_thread.elt_waitq);
+
+ while (1) {
+ l_wait_event(expired_lock_thread.elt_waitq,
+ have_expired_locks() ||
+ expired_lock_thread.elt_state == ELT_TERMINATE,
+ &lwi);
+
+ spin_lock_bh(&waiting_locks_spinlock);
+ if (expired_lock_thread.elt_dump) {
+ struct libcfs_debug_msg_data msgdata = {
+ .msg_file = __FILE__,
+ .msg_fn = "waiting_locks_callback",
+ .msg_line = expired_lock_thread.elt_dump };
+ spin_unlock_bh(&waiting_locks_spinlock);
+
+ /* from waiting_locks_callback, but not in timer */
+ libcfs_debug_dumplog();
+ libcfs_run_lbug_upcall(&msgdata);
+
+ spin_lock_bh(&waiting_locks_spinlock);
+ expired_lock_thread.elt_dump = 0;
+ }
- while (!cfs_list_empty(expired)) {
- struct obd_export *export;
- struct ldlm_lock *lock;
+ do_dump = 0;
- lock = cfs_list_entry(expired->next, struct ldlm_lock,
- l_pending_chain);
- if ((void *)lock < LP_POISON + CFS_PAGE_SIZE &&
- (void *)lock >= LP_POISON) {
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
- CERROR("free lock on elt list %p\n", lock);
- LBUG();
- }
- cfs_list_del_init(&lock->l_pending_chain);
- if ((void *)lock->l_export < LP_POISON + CFS_PAGE_SIZE &&
- (void *)lock->l_export >= LP_POISON) {
- CERROR("lock with free export on elt list %p\n",
- lock->l_export);
- lock->l_export = NULL;
- LDLM_ERROR(lock, "free export");
- /* release extra ref grabbed by
- * ldlm_add_waiting_lock() or
- * ldlm_failed_ast() */
- LDLM_LOCK_RELEASE(lock);
- continue;
- }
+ while (!list_empty(expired)) {
+ struct obd_export *export;
+ struct ldlm_lock *lock;
- if (lock->l_destroyed) {
+ lock = list_entry(expired->next, struct ldlm_lock,
+ l_pending_chain);
+ if ((void *)lock < LP_POISON + PAGE_SIZE &&
+ (void *)lock >= LP_POISON) {
+ spin_unlock_bh(&waiting_locks_spinlock);
+ CERROR("free lock on elt list %p\n", lock);
+ LBUG();
+ }
+ list_del_init(&lock->l_pending_chain);
+ if ((void *)lock->l_export <
+ LP_POISON + PAGE_SIZE &&
+ (void *)lock->l_export >= LP_POISON) {
+ CERROR("lock with free export on elt list %p\n",
+ lock->l_export);
+ lock->l_export = NULL;
+ LDLM_ERROR(lock, "free export");
+ /* release extra ref grabbed by
+ * ldlm_add_waiting_lock() or
+ * ldlm_failed_ast() */
+ LDLM_LOCK_RELEASE(lock);
+ continue;
+ }
+
+ if (ldlm_is_destroyed(lock)) {
/* release the lock refcount where
* waiting_locks_callback() founds */
LDLM_LOCK_RELEASE(lock);
continue;
}
- export = class_export_lock_get(lock->l_export, lock);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ export = class_export_lock_get(lock->l_export, lock);
+ spin_unlock_bh(&waiting_locks_spinlock);
- do_dump++;
- class_fail_export(export);
- class_export_lock_put(export, lock);
+ spin_lock_bh(&export->exp_bl_list_lock);
+ list_del_init(&lock->l_exp_list);
+ spin_unlock_bh(&export->exp_bl_list_lock);
- /* release extra ref grabbed by ldlm_add_waiting_lock()
- * or ldlm_failed_ast() */
- LDLM_LOCK_RELEASE(lock);
+ do_dump++;
+ class_fail_export(export);
+ class_export_lock_put(export, lock);
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- }
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ /* release extra ref grabbed by ldlm_add_waiting_lock()
+ * or ldlm_failed_ast() */
+ LDLM_LOCK_RELEASE(lock);
- if (do_dump && obd_dump_on_eviction) {
- CERROR("dump the log upon eviction\n");
- libcfs_debug_dumplog();
- }
+ spin_lock_bh(&waiting_locks_spinlock);
+ }
+ spin_unlock_bh(&waiting_locks_spinlock);
- if (expired_lock_thread.elt_state == ELT_TERMINATE)
- break;
- }
+ if (do_dump && obd_dump_on_eviction) {
+ CERROR("dump the log upon eviction\n");
+ libcfs_debug_dumplog();
+ }
- expired_lock_thread.elt_state = ELT_STOPPED;
- cfs_waitq_signal(&expired_lock_thread.elt_waitq);
- RETURN(0);
+ if (expired_lock_thread.elt_state == ELT_TERMINATE)
+ break;
+ }
+
+ expired_lock_thread.elt_state = ELT_STOPPED;
+ wake_up(&expired_lock_thread.elt_waitq);
+ RETURN(0);
}
static int ldlm_add_waiting_lock(struct ldlm_lock *lock);
*/
static int ldlm_lock_busy(struct ldlm_lock *lock)
{
- struct ptlrpc_request *req;
- int match = 0;
- ENTRY;
+ struct ptlrpc_request *req;
+ int match = 0;
+ ENTRY;
- if (lock->l_export == NULL)
- return 0;
+ if (lock->l_export == NULL)
+ return 0;
- cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
- cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
- rq_exp_list) {
- if (req->rq_ops->hpreq_lock_match) {
- match = req->rq_ops->hpreq_lock_match(req, lock);
- if (match)
- break;
- }
- }
- cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
- RETURN(match);
+ spin_lock_bh(&lock->l_export->exp_rpc_lock);
+ list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
+ rq_exp_list) {
+ if (req->rq_ops->hpreq_lock_match) {
+ match = req->rq_ops->hpreq_lock_match(req, lock);
+ if (match)
+ break;
+ }
+ }
+ spin_unlock_bh(&lock->l_export->exp_rpc_lock);
+ RETURN(match);
}
/* This is called from within a timer interrupt and cannot schedule */
struct ldlm_lock *lock;
int need_dump = 0;
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- while (!cfs_list_empty(&waiting_locks_list)) {
- lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
+ spin_lock_bh(&waiting_locks_spinlock);
+ while (!list_empty(&waiting_locks_list)) {
+ lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
l_pending_chain);
if (cfs_time_after(lock->l_callback_timeout,
cfs_time_current()) ||
(lock->l_req_mode == LCK_GROUP))
break;
- if (ptlrpc_check_suspend()) {
- /* there is a case when we talk to one mds, holding
- * lock from another mds. this way we easily can get
- * here, if second mds is being recovered. so, we
- * suspend timeouts. bug 6019 */
-
- LDLM_ERROR(lock, "recharge timeout: %s@%s nid %s ",
- lock->l_export->exp_client_uuid.uuid,
- lock->l_export->exp_connection->c_remote_uuid.uuid,
- libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
-
- cfs_list_del_init(&lock->l_pending_chain);
- if (lock->l_destroyed) {
- /* relay the lock refcount decrease to
- * expired lock thread */
- cfs_list_add(&lock->l_pending_chain,
- &expired_lock_thread.elt_expired_locks);
- } else {
- __ldlm_add_waiting_lock(lock,
- ldlm_get_enq_timeout(lock));
- }
- continue;
- }
-
- /* if timeout overlaps the activation time of suspended timeouts
- * then extend it to give a chance for client to reconnect */
- if (cfs_time_before(cfs_time_sub(lock->l_callback_timeout,
- cfs_time_seconds(obd_timeout)/2),
- ptlrpc_suspend_wakeup_time())) {
- LDLM_ERROR(lock, "extend timeout due to recovery: %s@%s nid %s ",
- lock->l_export->exp_client_uuid.uuid,
- lock->l_export->exp_connection->c_remote_uuid.uuid,
- libcfs_nid2str(lock->l_export->exp_connection->c_peer.nid));
-
- cfs_list_del_init(&lock->l_pending_chain);
- if (lock->l_destroyed) {
- /* relay the lock refcount decrease to
- * expired lock thread */
- cfs_list_add(&lock->l_pending_chain,
- &expired_lock_thread.elt_expired_locks);
- } else {
- __ldlm_add_waiting_lock(lock,
- ldlm_get_enq_timeout(lock));
- }
- continue;
- }
-
/* Check if we need to prolong timeout */
if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_TIMEOUT) &&
ldlm_lock_busy(lock)) {
LDLM_LOCK_GET(lock);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
- LDLM_DEBUG(lock, "prolong the busy lock");
- ldlm_refresh_waiting_lock(lock,
- ldlm_get_enq_timeout(lock));
- cfs_spin_lock_bh(&waiting_locks_spinlock);
+ spin_unlock_bh(&waiting_locks_spinlock);
+ LDLM_DEBUG(lock, "prolong the busy lock");
+ ldlm_refresh_waiting_lock(lock,
+ ldlm_bl_timeout(lock) >> 1);
+ spin_lock_bh(&waiting_locks_spinlock);
if (!cont) {
LDLM_LOCK_RELEASE(lock);
ldlm_lock_to_ns(lock)->ns_timeouts++;
LDLM_ERROR(lock, "lock callback timer expired after %lds: "
"evicting client at %s ",
- cfs_time_current_sec()- lock->l_last_activity,
+ cfs_time_current_sec() - lock->l_last_activity,
libcfs_nid2str(
lock->l_export->exp_connection->c_peer.nid));
/* no needs to take an extra ref on the lock since it was in
* the waiting_locks_list and ldlm_add_waiting_lock()
* already grabbed a ref */
- cfs_list_del(&lock->l_pending_chain);
- cfs_list_add(&lock->l_pending_chain,
+ list_del(&lock->l_pending_chain);
+ list_add(&lock->l_pending_chain,
&expired_lock_thread.elt_expired_locks);
need_dump = 1;
}
- if (!cfs_list_empty(&expired_lock_thread.elt_expired_locks)) {
+ if (!list_empty(&expired_lock_thread.elt_expired_locks)) {
if (obd_dump_on_timeout && need_dump)
expired_lock_thread.elt_dump = __LINE__;
- cfs_waitq_signal(&expired_lock_thread.elt_waitq);
+ wake_up(&expired_lock_thread.elt_waitq);
}
/*
* Make sure the timer will fire again if we have any locks
* left.
*/
- if (!cfs_list_empty(&waiting_locks_list)) {
+ if (!list_empty(&waiting_locks_list)) {
cfs_time_t timeout_rounded;
- lock = cfs_list_entry(waiting_locks_list.next, struct ldlm_lock,
+ lock = list_entry(waiting_locks_list.next, struct ldlm_lock,
l_pending_chain);
timeout_rounded = (cfs_time_t)round_timeout(lock->l_callback_timeout);
cfs_timer_arm(&waiting_locks_timer, timeout_rounded);
}
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ spin_unlock_bh(&waiting_locks_spinlock);
}
-/*
+/**
+ * Add lock to the list of contended locks.
+ *
* Indicate that we're waiting for a client to call us back cancelling a given
* lock. We add it to the pending-callback chain, and schedule the lock-timeout
* timer to fire appropriately. (We round up to the next second, to avoid
cfs_time_t timeout;
cfs_time_t timeout_rounded;
- if (!cfs_list_empty(&lock->l_pending_chain))
+ if (!list_empty(&lock->l_pending_chain))
return 0;
if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_HPREQ_NOTIMEOUT) ||
/* if the new lock has a shorter timeout than something earlier on
the list, we'll wait the longer amount of time; no big deal. */
/* FIFO */
- cfs_list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
+ list_add_tail(&lock->l_pending_chain, &waiting_locks_list);
return 1;
}
+static void ldlm_add_blocked_lock(struct ldlm_lock *lock)
+{
+ spin_lock_bh(&lock->l_export->exp_bl_list_lock);
+ if (list_empty(&lock->l_exp_list)) {
+ if (lock->l_granted_mode != lock->l_req_mode)
+ list_add_tail(&lock->l_exp_list,
+ &lock->l_export->exp_bl_list);
+ else
+ list_add(&lock->l_exp_list,
+ &lock->l_export->exp_bl_list);
+ }
+ spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
+
+ /* A blocked lock is added. Adjust the position in
+ * the stale list if the export is in the list.
+ * If export is stale and not in the list - it is being
+ * processed and will be placed on the right position
+ * on obd_stale_export_put(). */
+ if (!list_empty(&lock->l_export->exp_stale_list))
+ obd_stale_export_adjust(lock->l_export);
+}
+
static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
{
int ret;
- int timeout = ldlm_get_enq_timeout(lock);
+ int timeout = ldlm_bl_timeout(lock);
/* NB: must be called with hold of lock_res_and_lock() */
- LASSERT(lock->l_res_locked);
- lock->l_waited = 1;
-
- LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
-
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- if (lock->l_destroyed) {
- static cfs_time_t next;
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
- LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
- if (cfs_time_after(cfs_time_current(), next)) {
- next = cfs_time_shift(14400);
- libcfs_debug_dumpstack(NULL);
- }
- return 0;
- }
+ LASSERT(ldlm_is_res_locked(lock));
+ LASSERT(!ldlm_is_cancel_on_block(lock));
+
+ /* Do not put cross-MDT lock in the waiting list, since we
+ * will not evict it due to timeout for now */
+ if (lock->l_export != NULL &&
+ (exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS))
+ return 0;
+
+ spin_lock_bh(&waiting_locks_spinlock);
+ if (ldlm_is_cancel(lock)) {
+ spin_unlock_bh(&waiting_locks_spinlock);
+ return 0;
+ }
- ret = __ldlm_add_waiting_lock(lock, timeout);
- if (ret) {
- /* grab ref on the lock if it has been added to the
- * waiting list */
- LDLM_LOCK_GET(lock);
- }
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ if (ldlm_is_destroyed(lock)) {
+ static cfs_time_t next;
- if (ret) {
- cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
- if (cfs_list_empty(&lock->l_exp_list))
- cfs_list_add(&lock->l_exp_list,
- &lock->l_export->exp_bl_list);
- cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
- }
+ spin_unlock_bh(&waiting_locks_spinlock);
+ LDLM_ERROR(lock, "not waiting on destroyed lock (bug 5653)");
+ if (cfs_time_after(cfs_time_current(), next)) {
+ next = cfs_time_shift(14400);
+ libcfs_debug_dumpstack(NULL);
+ }
+ return 0;
+ }
- LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
- ret == 0 ? "not re-" : "", timeout,
- AT_OFF ? "off" : "on");
- return ret;
+ ldlm_set_waited(lock);
+ lock->l_last_activity = cfs_time_current_sec();
+ ret = __ldlm_add_waiting_lock(lock, timeout);
+ if (ret) {
+ /* grab ref on the lock if it has been added to the
+ * waiting list */
+ LDLM_LOCK_GET(lock);
+ }
+ spin_unlock_bh(&waiting_locks_spinlock);
+
+ if (ret)
+ ldlm_add_blocked_lock(lock);
+
+ LDLM_DEBUG(lock, "%sadding to wait list(timeout: %d, AT: %s)",
+ ret == 0 ? "not re-" : "", timeout,
+ AT_OFF ? "off" : "on");
+ return ret;
}
-/*
+/**
* Remove a lock from the pending list, likely because it had its cancellation
* callback arrive without incident. This adjusts the lock-timeout timer if
* needed. Returns 0 if the lock wasn't pending after all, 1 if it was.
*/
static int __ldlm_del_waiting_lock(struct ldlm_lock *lock)
{
- cfs_list_t *list_next;
+ struct list_head *list_next;
- if (cfs_list_empty(&lock->l_pending_chain))
+ if (list_empty(&lock->l_pending_chain))
return 0;
list_next = lock->l_pending_chain.next;
cfs_timer_disarm(&waiting_locks_timer);
} else {
struct ldlm_lock *next;
- next = cfs_list_entry(list_next, struct ldlm_lock,
+ next = list_entry(list_next, struct ldlm_lock,
l_pending_chain);
cfs_timer_arm(&waiting_locks_timer,
round_timeout(next->l_callback_timeout));
}
}
- cfs_list_del_init(&lock->l_pending_chain);
+ list_del_init(&lock->l_pending_chain);
return 1;
}
return 0;
}
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- ret = __ldlm_del_waiting_lock(lock);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ spin_lock_bh(&waiting_locks_spinlock);
+ ret = __ldlm_del_waiting_lock(lock);
+ ldlm_clear_waited(lock);
+ spin_unlock_bh(&waiting_locks_spinlock);
- /* remove the lock out of export blocking list */
- cfs_spin_lock_bh(&lock->l_export->exp_bl_list_lock);
- cfs_list_del_init(&lock->l_exp_list);
- cfs_spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
+ /* remove the lock out of export blocking list */
+ spin_lock_bh(&lock->l_export->exp_bl_list_lock);
+ list_del_init(&lock->l_exp_list);
+ spin_unlock_bh(&lock->l_export->exp_bl_list_lock);
if (ret) {
/* release lock ref if it has indeed been removed
return ret;
}
-/*
- * Prolong the lock
+/**
+ * Prolong the contended lock waiting time.
*
* Called with namespace lock held.
*/
int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout)
{
- if (lock->l_export == NULL) {
- /* We don't have a "waiting locks list" on clients. */
- LDLM_DEBUG(lock, "client lock: no-op");
- return 0;
- }
+ if (lock->l_export == NULL) {
+ /* We don't have a "waiting locks list" on clients. */
+ LDLM_DEBUG(lock, "client lock: no-op");
+ return 0;
+ }
- cfs_spin_lock_bh(&waiting_locks_spinlock);
+ if (exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) {
+ /* We don't have a "waiting locks list" on OSP. */
+ LDLM_DEBUG(lock, "MDS-MDS lock: no-op");
+ return 0;
+ }
- if (cfs_list_empty(&lock->l_pending_chain)) {
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
- LDLM_DEBUG(lock, "wasn't waiting");
- return 0;
- }
+ spin_lock_bh(&waiting_locks_spinlock);
- /* we remove/add the lock to the waiting list, so no needs to
- * release/take a lock reference */
- __ldlm_del_waiting_lock(lock);
- __ldlm_add_waiting_lock(lock, timeout);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
+ if (list_empty(&lock->l_pending_chain)) {
+ spin_unlock_bh(&waiting_locks_spinlock);
+ LDLM_DEBUG(lock, "wasn't waiting");
+ return 0;
+ }
- LDLM_DEBUG(lock, "refreshed");
- return 1;
+ /* we remove/add the lock to the waiting list, so no needs to
+ * release/take a lock reference */
+ __ldlm_del_waiting_lock(lock);
+ __ldlm_add_waiting_lock(lock, timeout);
+ spin_unlock_bh(&waiting_locks_spinlock);
+
+ LDLM_DEBUG(lock, "refreshed");
+ return 1;
}
+EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
-#else /* !HAVE_SERVER_SUPPORT || !__KERNEL__ */
+#else /* HAVE_SERVER_SUPPORT */
int ldlm_del_waiting_lock(struct ldlm_lock *lock)
{
RETURN(0);
}
-# ifdef HAVE_SERVER_SUPPORT
-static int ldlm_add_waiting_lock(struct ldlm_lock *lock)
+#endif /* !HAVE_SERVER_SUPPORT */
+
+#ifdef HAVE_SERVER_SUPPORT
+
+/**
+ * Calculate the per-export Blocking timeout (covering BL AST, data flush,
+ * lock cancel, and their replies). Used for lock callback timeout and AST
+ * re-send period.
+ *
+ * \param[in] lock lock which is getting the blocking callback
+ *
+ * \retval timeout in seconds to wait for the client reply
+ */
+unsigned int ldlm_bl_timeout(struct ldlm_lock *lock)
{
- LASSERT(lock->l_res_locked);
- LASSERT(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK));
- RETURN(1);
-}
+ unsigned int timeout;
-# endif
-#endif /* HAVE_SERVER_SUPPORT && __KERNEL__ */
+ if (AT_OFF)
+ return obd_timeout / 2;
-#ifdef HAVE_SERVER_SUPPORT
+ /* Since these are non-updating timeouts, we should be conservative.
+ * Take more than usually, 150%
+ * It would be nice to have some kind of "early reply" mechanism for
+ * lock callbacks too... */
+ timeout = at_get(&lock->l_export->exp_bl_lock_at);
+ return max(timeout + (timeout >> 1), ldlm_enqueue_min);
+}
+EXPORT_SYMBOL(ldlm_bl_timeout);
+/**
+ * Perform lock cleanup if AST sending failed.
+ */
static void ldlm_failed_ast(struct ldlm_lock *lock, int rc,
const char *ast_type)
{
if (obd_dump_on_timeout)
libcfs_debug_dumplog();
-#ifdef __KERNEL__
- cfs_spin_lock_bh(&waiting_locks_spinlock);
- if (__ldlm_del_waiting_lock(lock) == 0)
- /* the lock was not in any list, grab an extra ref before adding
- * the lock to the expired list */
- LDLM_LOCK_GET(lock);
- cfs_list_add(&lock->l_pending_chain,
- &expired_lock_thread.elt_expired_locks);
- cfs_waitq_signal(&expired_lock_thread.elt_waitq);
- cfs_spin_unlock_bh(&waiting_locks_spinlock);
-#else
- class_fail_export(lock->l_export);
-#endif
+ spin_lock_bh(&waiting_locks_spinlock);
+ if (__ldlm_del_waiting_lock(lock) == 0)
+ /* the lock was not in any list, grab an extra ref before adding
+ * the lock to the expired list */
+ LDLM_LOCK_GET(lock);
+ list_add(&lock->l_pending_chain,
+ &expired_lock_thread.elt_expired_locks);
+ wake_up(&expired_lock_thread.elt_waitq);
+ spin_unlock_bh(&waiting_locks_spinlock);
}
+/**
+ * Perform lock cleanup if AST reply came with error.
+ */
static int ldlm_handle_ast_error(struct ldlm_lock *lock,
- struct ptlrpc_request *req, int rc,
- const char *ast_type)
-{
- lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
-
- if (rc == -ETIMEDOUT || rc == -EINTR || rc == -ENOTCONN) {
- LASSERT(lock->l_export);
- if (lock->l_export->exp_libclient) {
- LDLM_DEBUG(lock, "%s AST to liblustre client (nid %s)"
- " timeout, just cancelling lock", ast_type,
- libcfs_nid2str(peer.nid));
- ldlm_lock_cancel(lock);
- rc = -ERESTART;
- } else if (lock->l_flags & LDLM_FL_CANCEL) {
- LDLM_DEBUG(lock, "%s AST timeout from nid %s, but "
- "cancel was received (AST reply lost?)",
- ast_type, libcfs_nid2str(peer.nid));
- ldlm_lock_cancel(lock);
- rc = -ERESTART;
- } else {
- ldlm_del_waiting_lock(lock);
- ldlm_failed_ast(lock, rc, ast_type);
- }
- } else if (rc) {
- if (rc == -EINVAL) {
- struct ldlm_resource *res = lock->l_resource;
- LDLM_DEBUG(lock, "client (nid %s) returned %d"
- " from %s AST - normal race",
- libcfs_nid2str(peer.nid),
- req->rq_repmsg ?
- lustre_msg_get_status(req->rq_repmsg) : -1,
- ast_type);
- if (res) {
- /* update lvbo to return proper attributes.
- * see bug 23174 */
- ldlm_resource_getref(res);
- ldlm_res_lvbo_update(res, NULL, 1);
- ldlm_resource_putref(res);
- }
+ struct ptlrpc_request *req, int rc,
+ const char *ast_type)
+{
+ lnet_process_id_t peer = req->rq_import->imp_connection->c_peer;
+
+ if (!req->rq_replied || (rc && rc != -EINVAL)) {
+ if (lock->l_export && lock->l_export->exp_libclient) {
+ LDLM_DEBUG(lock,
+ "%s AST (req@%p x%llu) to liblustre client (nid %s) timeout, just cancelling lock",
+ ast_type, req, req->rq_xid,
+ libcfs_nid2str(peer.nid));
+ ldlm_lock_cancel(lock);
+ rc = -ERESTART;
+ } else if (ldlm_is_cancel(lock)) {
+ LDLM_DEBUG(lock,
+ "%s AST (req@%p x%llu) timeout from nid %s, but cancel was received (AST reply lost?)",
+ ast_type, req, req->rq_xid,
+ libcfs_nid2str(peer.nid));
+ ldlm_lock_cancel(lock);
+ rc = -ERESTART;
+ } else {
+ LDLM_ERROR(lock,
+ "client (nid %s) %s %s AST (req@%p x%llu status %d rc %d), evict it",
+ libcfs_nid2str(peer.nid),
+ req->rq_replied ? "returned error from" :
+ "failed to reply to",
+ ast_type, req, req->rq_xid,
+ (req->rq_repmsg != NULL) ?
+ lustre_msg_get_status(req->rq_repmsg) : 0,
+ rc);
+ ldlm_failed_ast(lock, rc, ast_type);
+ }
+ return rc;
+ }
- } else {
- LDLM_ERROR(lock, "client (nid %s) returned %d "
- "from %s AST", libcfs_nid2str(peer.nid),
- (req->rq_repmsg != NULL) ?
- lustre_msg_get_status(req->rq_repmsg) : 0,
- ast_type);
- }
- ldlm_lock_cancel(lock);
- /* Server-side AST functions are called from ldlm_reprocess_all,
- * which needs to be told to please restart its reprocessing. */
- rc = -ERESTART;
- }
+ if (rc == -EINVAL) {
+ struct ldlm_resource *res = lock->l_resource;
+
+ LDLM_DEBUG(lock,
+ "client (nid %s) returned %d from %s AST (req@%p x%llu) - normal race",
+ libcfs_nid2str(peer.nid),
+ req->rq_repmsg ?
+ lustre_msg_get_status(req->rq_repmsg) : -1,
+ ast_type, req, req->rq_xid);
+ if (res) {
+ /* update lvbo to return proper attributes.
+ * see bug 23174 */
+ ldlm_resource_getref(res);
+ ldlm_res_lvbo_update(res, NULL, 1);
+ ldlm_resource_putref(res);
+ }
+ ldlm_lock_cancel(lock);
+ rc = -ERESTART;
+ }
- return rc;
+ return rc;
}
static int ldlm_cb_interpret(const struct lu_env *env,
LDLM_LOCK_RELEASE(lock);
if (rc == -ERESTART)
- cfs_atomic_inc(&arg->restart);
+ atomic_inc(&arg->restart);
- RETURN(0);
+ RETURN(0);
+}
+
+static void ldlm_update_resend(struct ptlrpc_request *req, void *data)
+{
+ struct ldlm_cb_async_args *ca = data;
+ struct ldlm_lock *lock = ca->ca_lock;
+
+ ldlm_refresh_waiting_lock(lock, ldlm_bl_timeout(lock));
}
static inline int ldlm_ast_fini(struct ptlrpc_request *req,
rc = ptl_send_rpc(req, 1);
ptlrpc_req_finished(req);
if (rc == 0)
- cfs_atomic_inc(&arg->restart);
+ atomic_inc(&arg->restart);
} else {
LDLM_LOCK_GET(lock);
ptlrpc_set_add_req(arg->set, req);
*/
static void ldlm_lock_reorder_req(struct ldlm_lock *lock)
{
- struct ptlrpc_request *req;
- ENTRY;
+ struct ptlrpc_request *req;
+ ENTRY;
- if (lock->l_export == NULL) {
- LDLM_DEBUG(lock, "client lock: no-op");
- RETURN_EXIT;
- }
+ if (lock->l_export == NULL) {
+ LDLM_DEBUG(lock, "client lock: no-op");
+ RETURN_EXIT;
+ }
- cfs_spin_lock_bh(&lock->l_export->exp_rpc_lock);
- cfs_list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
- rq_exp_list) {
- /* Do not process requests that were not yet added to there
- * incoming queue or were already removed from there for
- * processing */
- if (!req->rq_hp && !cfs_list_empty(&req->rq_list) &&
- req->rq_ops->hpreq_lock_match &&
- req->rq_ops->hpreq_lock_match(req, lock))
- ptlrpc_hpreq_reorder(req);
- }
- cfs_spin_unlock_bh(&lock->l_export->exp_rpc_lock);
- EXIT;
+ spin_lock_bh(&lock->l_export->exp_rpc_lock);
+ list_for_each_entry(req, &lock->l_export->exp_hp_rpcs,
+ rq_exp_list) {
+ /* Do not process requests that were not yet added to there
+ * incoming queue or were already removed from there for
+ * processing. We evaluate ptlrpc_nrs_req_can_move() without
+ * holding svcpt->scp_req_lock, and then redo the check with
+ * the lock held once we need to obtain a reliable result.
+ */
+ if (ptlrpc_nrs_req_can_move(req) &&
+ req->rq_ops->hpreq_lock_match &&
+ req->rq_ops->hpreq_lock_match(req, lock))
+ ptlrpc_nrs_req_hp_move(req);
+ }
+ spin_unlock_bh(&lock->l_export->exp_rpc_lock);
+ EXIT;
}
-/*
+/**
* ->l_blocking_ast() method for server-side locks. This is invoked when newly
* enqueued server lock conflicts with given one.
*
- * Sends blocking ast rpc to the client owning that lock; arms timeout timer
+ * Sends blocking AST RPC to the client owning that lock; arms timeout timer
* to wait for client response.
*/
int ldlm_server_blocking_ast(struct ldlm_lock *lock,
/* Don't need to do anything here. */
RETURN(0);
+ if (OBD_FAIL_PRECHECK(OBD_FAIL_LDLM_SRV_BL_AST)) {
+ LDLM_DEBUG(lock, "dropping BL AST");
+ RETURN(0);
+ }
+
LASSERT(lock);
LASSERT(data != NULL);
if (lock->l_export->exp_obd->obd_recovering != 0)
ca->ca_lock = lock;
req->rq_interpret_reply = ldlm_cb_interpret;
- req->rq_no_resend = 1;
lock_res_and_lock(lock);
- if (lock->l_granted_mode != lock->l_req_mode) {
- /* this blocking AST will be communicated as part of the
- * completion AST instead */
+ if (ldlm_is_destroyed(lock)) {
+ /* What's the point? */
unlock_res_and_lock(lock);
-
ptlrpc_req_finished(req);
- LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
RETURN(0);
}
- if (lock->l_destroyed) {
- /* What's the point? */
+ if (lock->l_granted_mode != lock->l_req_mode) {
+ /* this blocking AST will be communicated as part of the
+ * completion AST instead */
+ ldlm_add_blocked_lock(lock);
+ ldlm_set_waited(lock);
unlock_res_and_lock(lock);
+
ptlrpc_req_finished(req);
+ LDLM_DEBUG(lock, "lock not granted, not sending blocking AST");
RETURN(0);
}
- if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
+ if (ldlm_is_cancel_on_block(lock))
instant_cancel = 1;
body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
body->lock_handle[0] = lock->l_remote_handle;
body->lock_desc = *desc;
- body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
+ body->lock_flags |= ldlm_flags_to_wire(lock->l_flags & LDLM_FL_AST_MASK);
LDLM_DEBUG(lock, "server preparing blocking AST");
ptlrpc_request_set_replen(req);
+ ldlm_set_cbpending(lock);
if (instant_cancel) {
unlock_res_and_lock(lock);
ldlm_lock_cancel(lock);
+
+ req->rq_no_resend = 1;
} else {
LASSERT(lock->l_granted_mode == lock->l_req_mode);
ldlm_add_waiting_lock(lock);
unlock_res_and_lock(lock);
+
+ /* Do not resend after lock callback timeout */
+ req->rq_delay_limit = ldlm_bl_timeout(lock);
+ req->rq_resend_cb = ldlm_update_resend;
}
req->rq_send_state = LUSTRE_IMP_FULL;
if (AT_OFF)
req->rq_timeout = ldlm_get_rq_timeout();
+ lock->l_last_activity = cfs_time_current_sec();
+
if (lock->l_export && lock->l_export->exp_nid_stats &&
lock->l_export->exp_nid_stats->nid_ldlm_stats)
lprocfs_counter_incr(lock->l_export->exp_nid_stats->nid_ldlm_stats,
RETURN(rc);
}
-int ldlm_server_completion_ast(struct ldlm_lock *lock, int flags, void *data)
+/**
+ * ->l_completion_ast callback for a remote lock in server namespace.
+ *
+ * Sends AST to the client notifying it of lock granting. If initial
+ * lock response was not sent yet, instead of sending another RPC, just
+ * mark the lock as granted and client will understand
+ */
+int ldlm_server_completion_ast(struct ldlm_lock *lock, __u64 flags, void *data)
{
struct ldlm_cb_set_arg *arg = data;
struct ldlm_request *body;
struct ptlrpc_request *req;
struct ldlm_cb_async_args *ca;
- long total_enqueue_wait;
int instant_cancel = 0;
int rc = 0;
+ int lvb_len;
ENTRY;
LASSERT(lock != NULL);
LASSERT(data != NULL);
- total_enqueue_wait = cfs_time_sub(cfs_time_current_sec(),
- lock->l_last_activity);
+ if (OBD_FAIL_PRECHECK(OBD_FAIL_LDLM_SRV_CP_AST)) {
+ LDLM_DEBUG(lock, "dropping CP AST");
+ RETURN(0);
+ }
req = ptlrpc_request_alloc(lock->l_export->exp_imp_reverse,
&RQF_LDLM_CP_CALLBACK);
if (req == NULL)
RETURN(-ENOMEM);
- /* server namespace, doesn't need lock */
- if (lock->l_resource->lr_lvb_len) {
- req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT,
- lock->l_resource->lr_lvb_len);
- }
+ /* server namespace, doesn't need lock */
+ lvb_len = ldlm_lvbo_size(lock);
+ /* LU-3124 & LU-2187: to not return layout in completion AST because
+ * it may deadlock for LU-2187, or client may not have enough space
+ * for large layout. The layout will be returned to client with an
+ * extra RPC to fetch xattr.lov */
+ if (ldlm_has_layout(lock))
+ lvb_len = 0;
+ req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT, lvb_len);
rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_CP_CALLBACK);
if (rc) {
ptlrpc_request_free(req);
ca->ca_lock = lock;
req->rq_interpret_reply = ldlm_cb_interpret;
- req->rq_no_resend = 1;
body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
body->lock_handle[0] = lock->l_remote_handle;
- body->lock_flags = flags;
+ body->lock_flags = ldlm_flags_to_wire(flags);
ldlm_lock2desc(lock, &body->lock_desc);
- if (lock->l_resource->lr_lvb_len) {
- void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
-
- lock_res(lock->l_resource);
- memcpy(lvb, lock->l_resource->lr_lvb_data,
- lock->l_resource->lr_lvb_len);
- unlock_res(lock->l_resource);
+ if (lvb_len > 0) {
+ void *lvb = req_capsule_client_get(&req->rq_pill, &RMF_DLM_LVB);
+
+ lvb_len = ldlm_lvbo_fill(lock, lvb, lvb_len);
+ if (lvb_len < 0) {
+ /* We still need to send the RPC to wake up the blocked
+ * enqueue thread on the client.
+ *
+ * Consider old client, there is no better way to notify
+ * the failure, just zero-sized the LVB, then the client
+ * will fail out as "-EPROTO". */
+ req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB, 0,
+ RCL_CLIENT);
+ instant_cancel = 1;
+ } else {
+ req_capsule_shrink(&req->rq_pill, &RMF_DLM_LVB, lvb_len,
+ RCL_CLIENT);
+ }
}
- LDLM_DEBUG(lock, "server preparing completion AST (after %lds wait)",
- total_enqueue_wait);
+ lock->l_last_activity = cfs_time_current_sec();
- /* Server-side enqueue wait time estimate, used in
- __ldlm_add_waiting_lock to set future enqueue timers */
- if (total_enqueue_wait < ldlm_get_enq_timeout(lock))
- at_measured(ldlm_lock_to_ns_at(lock),
- total_enqueue_wait);
- else
- /* bz18618. Don't add lock enqueue time we spend waiting for a
- previous callback to fail. Locks waiting legitimately will
- get extended by ldlm_refresh_waiting_lock regardless of the
- estimate, so it's okay to underestimate here. */
- LDLM_DEBUG(lock, "lock completed after %lus; estimate was %ds. "
- "It is likely that a previous callback timed out.",
- total_enqueue_wait,
- at_get(ldlm_lock_to_ns_at(lock)));
+ LDLM_DEBUG(lock, "server preparing completion AST");
ptlrpc_request_set_replen(req);
/* We only send real blocking ASTs after the lock is granted */
lock_res_and_lock(lock);
- if (lock->l_flags & LDLM_FL_AST_SENT) {
- body->lock_flags |= LDLM_FL_AST_SENT;
- /* copy ast flags like LDLM_FL_DISCARD_DATA */
- body->lock_flags |= (lock->l_flags & LDLM_AST_FLAGS);
+ if (ldlm_is_ast_sent(lock)) {
+ body->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT);
+ /* Copy AST flags like LDLM_FL_DISCARD_DATA. */
+ body->lock_flags |= ldlm_flags_to_wire(lock->l_flags &
+ LDLM_FL_AST_MASK);
/* We might get here prior to ldlm_handle_enqueue setting
* LDLM_FL_CANCEL_ON_BLOCK flag. Then we will put this lock
* ldlm_handle_enqueue will call ldlm_lock_cancel() still,
* that would not only cancel the lock, but will also remove
* it from waiting list */
- if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) {
- unlock_res_and_lock(lock);
- ldlm_lock_cancel(lock);
- instant_cancel = 1;
- lock_res_and_lock(lock);
- } else {
- /* start the lock-timeout clock */
- ldlm_add_waiting_lock(lock);
- }
+ if (ldlm_is_cancel_on_block(lock)) {
+ unlock_res_and_lock(lock);
+ ldlm_lock_cancel(lock);
+
+ instant_cancel = 1;
+ req->rq_no_resend = 1;
+
+ lock_res_and_lock(lock);
+ } else {
+ /* start the lock-timeout clock */
+ ldlm_add_waiting_lock(lock);
+ /* Do not resend after lock callback timeout */
+ req->rq_delay_limit = ldlm_bl_timeout(lock);
+ req->rq_resend_cb = ldlm_update_resend;
+ }
}
unlock_res_and_lock(lock);
rc = ldlm_ast_fini(req, arg, lock, instant_cancel);
- RETURN(rc);
+ RETURN(lvb_len < 0 ? lvb_len : rc);
}
+/**
+ * Server side ->l_glimpse_ast handler for client locks.
+ *
+ * Sends glimpse AST to the client and waits for reply. Then updates
+ * lvbo with the result.
+ */
int ldlm_server_glimpse_ast(struct ldlm_lock *lock, void *data)
{
struct ldlm_cb_set_arg *arg = data;
struct ptlrpc_request *req;
struct ldlm_cb_async_args *ca;
int rc;
+ struct req_format *req_fmt;
ENTRY;
LASSERT(lock != NULL);
+ if (arg->gl_desc != NULL)
+ /* There is a glimpse descriptor to pack */
+ req_fmt = &RQF_LDLM_GL_DESC_CALLBACK;
+ else
+ req_fmt = &RQF_LDLM_GL_CALLBACK;
+
req = ptlrpc_request_alloc_pack(lock->l_export->exp_imp_reverse,
- &RQF_LDLM_GL_CALLBACK,
- LUSTRE_DLM_VERSION, LDLM_GL_CALLBACK);
+ req_fmt, LUSTRE_DLM_VERSION,
+ LDLM_GL_CALLBACK);
if (req == NULL)
RETURN(-ENOMEM);
+ if (arg->gl_desc != NULL) {
+ /* copy the GL descriptor */
+ union ldlm_gl_desc *desc;
+ desc = req_capsule_client_get(&req->rq_pill, &RMF_DLM_GL_DESC);
+ *desc = *arg->gl_desc;
+ }
+
body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
body->lock_handle[0] = lock->l_remote_handle;
ldlm_lock2desc(lock, &body->lock_desc);
/* server namespace, doesn't need lock */
req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
- lock->l_resource->lr_lvb_len);
+ ldlm_lvbo_size(lock));
ptlrpc_request_set_replen(req);
req->rq_send_state = LUSTRE_IMP_FULL;
if (AT_OFF)
req->rq_timeout = ldlm_get_rq_timeout();
+ lock->l_last_activity = cfs_time_current_sec();
+
req->rq_interpret_reply = ldlm_cb_interpret;
if (lock->l_export && lock->l_export->exp_nid_stats &&
RETURN(rc);
}
-int ldlm_glimpse_locks(struct ldlm_resource *res, cfs_list_t *gl_work_list)
+int ldlm_glimpse_locks(struct ldlm_resource *res,
+ struct list_head *gl_work_list)
{
int rc;
ENTRY;
RETURN(rc);
}
+EXPORT_SYMBOL(ldlm_glimpse_locks);
+
+/* return LDLM lock associated with a lock callback request */
+struct ldlm_lock *ldlm_request_lock(struct ptlrpc_request *req)
+{
+ struct ldlm_cb_async_args *ca;
+ struct ldlm_lock *lock;
+ ENTRY;
+
+ ca = ptlrpc_req_async_args(req);
+ lock = ca->ca_lock;
+ if (lock == NULL)
+ RETURN(ERR_PTR(-EFAULT));
+
+ RETURN(lock);
+}
+EXPORT_SYMBOL(ldlm_request_lock);
static void ldlm_svc_get_eopc(const struct ldlm_request *dlm_req,
struct lprocfs_stats *srv_stats)
return;
}
-/*
- * Main server-side entry point into LDLM. This is called by ptlrpc service
- * threads to carry out client lock enqueueing requests.
+/**
+ * Main server-side entry point into LDLM for enqueue. This is called by ptlrpc
+ * service threads to carry out client lock enqueueing requests.
*/
int ldlm_handle_enqueue0(struct ldlm_namespace *ns,
- struct ptlrpc_request *req,
- const struct ldlm_request *dlm_req,
- const struct ldlm_callback_suite *cbs)
-{
- struct ldlm_reply *dlm_rep;
- __u32 flags;
- ldlm_error_t err = ELDLM_OK;
- struct ldlm_lock *lock = NULL;
- void *cookie = NULL;
- int rc = 0;
- ENTRY;
+ struct ptlrpc_request *req,
+ const struct ldlm_request *dlm_req,
+ const struct ldlm_callback_suite *cbs)
+{
+ struct ldlm_reply *dlm_rep;
+ __u64 flags;
+ enum ldlm_error err = ELDLM_OK;
+ struct ldlm_lock *lock = NULL;
+ void *cookie = NULL;
+ int rc = 0;
+ struct ldlm_resource *res = NULL;
+ ENTRY;
- LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
+ LDLM_DEBUG_NOLOCK("server-side enqueue handler START");
- ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF);
- flags = dlm_req->lock_flags;
+ ldlm_request_cancel(req, dlm_req, LDLM_ENQUEUE_CANCEL_OFF, LATF_SKIP);
+ flags = ldlm_flags_from_wire(dlm_req->lock_flags);
- LASSERT(req->rq_export);
+ LASSERT(req->rq_export);
if (ptlrpc_req2svc(req)->srv_stats != NULL)
ldlm_svc_get_eopc(dlm_req, ptlrpc_req2svc(req)->srv_stats);
GOTO(out, rc = -EFAULT);
}
- if (req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) {
+ if (exp_connect_flags(req->rq_export) & OBD_CONNECT_IBITS) {
if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
LDLM_PLAIN)) {
DEBUG_REQ(D_ERROR, req,
GOTO(out, rc = -EPROTO);
}
-#if 0
- /* FIXME this makes it impossible to use LDLM_PLAIN locks -- check
- against server's _CONNECT_SUPPORTED flags? (I don't want to use
- ibits for mgc/mgs) */
-
- /* INODEBITS_INTEROP: Perform conversion from plain lock to
- * inodebits lock if client does not support them. */
- if (!(req->rq_export->exp_connect_flags & OBD_CONNECT_IBITS) &&
- (dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN)) {
- dlm_req->lock_desc.l_resource.lr_type = LDLM_IBITS;
- dlm_req->lock_desc.l_policy_data.l_inodebits.bits =
- MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE;
- if (dlm_req->lock_desc.l_req_mode == LCK_PR)
- dlm_req->lock_desc.l_req_mode = LCK_CR;
- }
-#endif
-
- if (unlikely(flags & LDLM_FL_REPLAY)) {
+ if (unlikely((flags & LDLM_FL_REPLAY) ||
+ (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))) {
/* Find an existing lock in the per-export lock hash */
+ /* In the function below, .hs_keycmp resolves to
+ * ldlm_export_lock_keycmp() */
+ /* coverity[overrun-buffer-val] */
lock = cfs_hash_lookup(req->rq_export->exp_lock_hash,
(void *)&dlm_req->lock_handle[0]);
if (lock != NULL) {
- DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie "
- LPX64, lock->l_handle.h_cookie);
+ DEBUG_REQ(D_DLMTRACE, req, "found existing lock cookie %#llx",
+ lock->l_handle.h_cookie);
+ flags |= LDLM_FL_RESENT;
GOTO(existing_lock, rc = 0);
- }
- }
-
- /* The lock's callback data might be set in the policy function */
- lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
- dlm_req->lock_desc.l_resource.lr_type,
- dlm_req->lock_desc.l_req_mode,
- cbs, NULL, 0);
+ }
+ } else {
+ if (ldlm_reclaim_full()) {
+ DEBUG_REQ(D_DLMTRACE, req, "Too many granted locks, "
+ "reject current enqueue request and let the "
+ "client retry later.\n");
+ GOTO(out, rc = -EINPROGRESS);
+ }
+ }
- if (!lock)
- GOTO(out, rc = -ENOMEM);
+ /* The lock's callback data might be set in the policy function */
+ lock = ldlm_lock_create(ns, &dlm_req->lock_desc.l_resource.lr_name,
+ dlm_req->lock_desc.l_resource.lr_type,
+ dlm_req->lock_desc.l_req_mode,
+ cbs, NULL, 0, LVB_T_NONE);
+ if (IS_ERR(lock)) {
+ rc = PTR_ERR(lock);
+ lock = NULL;
+ GOTO(out, rc);
+ }
- lock->l_last_activity = cfs_time_current_sec();
lock->l_remote_handle = dlm_req->lock_handle[0];
LDLM_DEBUG(lock, "server-side enqueue handler, new lock created");
+ /* Initialize resource lvb but not for a lock being replayed since
+ * Client already got lvb sent in this case.
+ * This must occur early since some policy methods assume resource
+ * lvb is available (lr_lvb_data != NULL).
+ */
+ res = lock->l_resource;
+ if (!(flags & LDLM_FL_REPLAY)) {
+ /* non-replayed lock, delayed lvb init may need to be done */
+ rc = ldlm_lvbo_init(res);
+ if (rc < 0) {
+ LDLM_DEBUG(lock, "delayed lvb init failed (rc %d)", rc);
+ GOTO(out, rc);
+ }
+ }
+
OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_BLOCKED, obd_timeout * 2);
/* Don't enqueue a lock onto the export if it is been disonnected
* due to eviction (bug 3822) or server umount (bug 24324).
&lock->l_remote_handle,
&lock->l_exp_hash);
+ /* Inherit the enqueue flags before the operation, because we do not
+ * keep the res lock on return and next operations (BL AST) may proceed
+ * without them. */
+ lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags &
+ LDLM_FL_INHERIT_MASK);
+
+ ldlm_convert_policy_to_local(req->rq_export,
+ dlm_req->lock_desc.l_resource.lr_type,
+ &dlm_req->lock_desc.l_policy_data,
+ &lock->l_policy_data);
+ if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
+ lock->l_req_extent = lock->l_policy_data.l_extent;
+
existing_lock:
if (flags & LDLM_FL_HAS_INTENT) {
/* based on the assumption that lvb size never changes during
* resource life time otherwise it need resource->lr_lock's
* protection */
- if (lock->l_resource->lr_lvb_len) {
- req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
- RCL_SERVER,
- lock->l_resource->lr_lvb_len);
- }
+ req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB,
+ RCL_SERVER, ldlm_lvbo_size(lock));
if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_EXTENT_ERR))
GOTO(out, rc = -ENOMEM);
GOTO(out, rc);
}
- if (dlm_req->lock_desc.l_resource.lr_type != LDLM_PLAIN)
- ldlm_convert_policy_to_local(req->rq_export,
- dlm_req->lock_desc.l_resource.lr_type,
- &dlm_req->lock_desc.l_policy_data,
- &lock->l_policy_data);
- if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
- lock->l_req_extent = lock->l_policy_data.l_extent;
-
- err = ldlm_lock_enqueue(ns, &lock, cookie, (int *)&flags);
- if (err)
- GOTO(out, err);
+ err = ldlm_lock_enqueue(ns, &lock, cookie, &flags);
+ if (err) {
+ if ((int)err < 0)
+ rc = (int)err;
+ GOTO(out, err);
+ }
dlm_rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
- dlm_rep->lock_flags = flags;
ldlm_lock2desc(lock, &dlm_rep->lock_desc);
ldlm_lock2handle(lock, &dlm_rep->lock_handle);
+ if (lock && lock->l_resource->lr_type == LDLM_EXTENT)
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_BL_EVICT, 6);
+
/* We never send a blocking AST until the lock is granted, but
* we can tell it right now */
lock_res_and_lock(lock);
/* Now take into account flags to be inherited from original lock
request both in reply to client and in our own lock flags. */
- dlm_rep->lock_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
- lock->l_flags |= dlm_req->lock_flags & LDLM_INHERIT_FLAGS;
+ dlm_rep->lock_flags = ldlm_flags_to_wire(flags);
+ lock->l_flags |= flags & LDLM_FL_INHERIT_MASK;
/* Don't move a pending lock onto the export if it has already been
* disconnected due to eviction (bug 5683) or server umount (bug 24324).
OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT))) {
LDLM_ERROR(lock, "lock on destroyed export %p", req->rq_export);
rc = -ENOTCONN;
- } else if (lock->l_flags & LDLM_FL_AST_SENT) {
- dlm_rep->lock_flags |= LDLM_FL_AST_SENT;
+ } else if (ldlm_is_ast_sent(lock)) {
+ dlm_rep->lock_flags |= ldlm_flags_to_wire(LDLM_FL_AST_SENT);
if (lock->l_granted_mode == lock->l_req_mode) {
/*
* Only cancel lock if it was granted, because it would
if ((dlm_req->lock_desc.l_resource.lr_type == LDLM_PLAIN ||
dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS) &&
req->rq_export->exp_libclient) {
- if (unlikely(!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK) ||
+ if (unlikely(!ldlm_is_cancel_on_block(lock) ||
!(dlm_rep->lock_flags & LDLM_FL_CANCEL_ON_BLOCK))){
CERROR("Granting sync lock to libclient. "
- "req fl %d, rep fl %d, lock fl "LPX64"\n",
+ "req fl %d, rep fl %d, lock fl %#llx\n",
dlm_req->lock_flags, dlm_rep->lock_flags,
lock->l_flags);
LDLM_ERROR(lock, "sync lock");
- if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
- struct ldlm_intent *it;
-
- it = req_capsule_client_get(&req->rq_pill,
- &RMF_LDLM_INTENT);
- if (it != NULL) {
- CERROR("This is intent %s ("LPU64")\n",
- ldlm_it2str(it->opc), it->opc);
- }
- }
+ if (dlm_req->lock_flags & LDLM_FL_HAS_INTENT) {
+ struct ldlm_intent *it;
+
+ it = req_capsule_client_get(&req->rq_pill,
+ &RMF_LDLM_INTENT);
+ if (it != NULL) {
+ CERROR("This is intent %s (%llu)\n",
+ ldlm_it2str(it->opc), it->opc);
+ }
+ }
}
}
/* The LOCK_CHANGED code in ldlm_lock_enqueue depends on this
* ldlm_reprocess_all. If this moves, revisit that code. -phil */
- if (lock) {
- LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
- "(err=%d, rc=%d)", err, rc);
-
- if (rc == 0) {
- if (lock->l_resource->lr_lvb_len > 0) {
- /* MDT path won't handle lr_lvb_data, so
- * lock/unlock better be contained in the
- * if block */
- void *lvb;
-
- lvb = req_capsule_server_get(&req->rq_pill,
- &RMF_DLM_LVB);
- LASSERTF(lvb != NULL, "req %p, lock %p\n",
- req, lock);
- lock_res(lock->l_resource);
- memcpy(lvb, lock->l_resource->lr_lvb_data,
- lock->l_resource->lr_lvb_len);
- unlock_res(lock->l_resource);
- }
- } else {
- lock_res_and_lock(lock);
- ldlm_resource_unlink_lock(lock);
- ldlm_lock_destroy_nolock(lock);
- unlock_res_and_lock(lock);
- }
+ if (lock != NULL) {
+ LDLM_DEBUG(lock, "server-side enqueue handler, sending reply"
+ "(err=%d, rc=%d)", err, rc);
+
+ if (rc == 0) {
+ if (req_capsule_has_field(&req->rq_pill, &RMF_DLM_LVB,
+ RCL_SERVER) &&
+ ldlm_lvbo_size(lock) > 0) {
+ void *buf;
+ int buflen;
+
+ buf = req_capsule_server_get(&req->rq_pill,
+ &RMF_DLM_LVB);
+ LASSERTF(buf != NULL, "req %p, lock %p\n",
+ req, lock);
+ buflen = req_capsule_get_size(&req->rq_pill,
+ &RMF_DLM_LVB, RCL_SERVER);
+ /* non-replayed lock, delayed lvb init may
+ * need to be occur now */
+ if ((buflen > 0) && !(flags & LDLM_FL_REPLAY)) {
+ buflen = ldlm_lvbo_fill(lock, buf,
+ buflen);
+ if (buflen >= 0)
+ req_capsule_shrink(
+ &req->rq_pill,
+ &RMF_DLM_LVB,
+ buflen, RCL_SERVER);
+ else
+ rc = buflen;
+ } else if (flags & LDLM_FL_REPLAY) {
+ /* no LVB resend upon replay */
+ if (buflen > 0)
+ req_capsule_shrink(
+ &req->rq_pill,
+ &RMF_DLM_LVB,
+ 0, RCL_SERVER);
+ else
+ rc = buflen;
+ } else {
+ rc = buflen;
+ }
+ }
+ }
+
+ if (rc != 0 && !(flags & LDLM_FL_RESENT)) {
+ if (lock->l_export) {
+ ldlm_lock_cancel(lock);
+ } else {
+ lock_res_and_lock(lock);
+ ldlm_resource_unlink_lock(lock);
+ ldlm_lock_destroy_nolock(lock);
+ unlock_res_and_lock(lock);
+
+ }
+ }
if (!err && dlm_req->lock_desc.l_resource.lr_type != LDLM_FLOCK)
ldlm_reprocess_all(lock->l_resource);
return rc;
}
+/**
+ * Old-style LDLM main entry point for server code enqueue.
+ */
int ldlm_handle_enqueue(struct ptlrpc_request *req,
ldlm_completion_callback completion_callback,
ldlm_blocking_callback blocking_callback,
return rc;
}
+/**
+ * Main LDLM entry point for server code to process lock conversion requests.
+ */
int ldlm_handle_convert0(struct ptlrpc_request *req,
const struct ldlm_request *dlm_req)
{
lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
if (!lock) {
- req->rq_status = EINVAL;
+ req->rq_status = LUSTRE_EINVAL;
} else {
void *res = NULL;
LDLM_DEBUG(lock, "server-side convert handler START");
- lock->l_last_activity = cfs_time_current_sec();
res = ldlm_lock_convert(lock, dlm_req->lock_desc.l_req_mode,
&dlm_rep->lock_flags);
if (res) {
LDLM_DEBUG(lock, "converted waiting lock");
req->rq_status = 0;
} else {
- req->rq_status = EDEADLOCK;
+ req->rq_status = LUSTRE_EDEADLK;
}
}
RETURN(0);
}
+/**
+ * Old-style main LDLM entry point for server code to process lock conversion
+ * requests.
+ */
int ldlm_handle_convert(struct ptlrpc_request *req)
{
int rc;
return rc;
}
-/* Cancel all the locks whos handles are packed into ldlm_request */
+/**
+ * Cancel all the locks whose handles are packed into ldlm_request
+ *
+ * Called by server code expecting such combined cancel activity
+ * requests.
+ */
int ldlm_request_cancel(struct ptlrpc_request *req,
- const struct ldlm_request *dlm_req, int first)
+ const struct ldlm_request *dlm_req,
+ int first, enum lustre_at_flags flags)
{
struct ldlm_resource *res, *pres = NULL;
struct ldlm_lock *lock;
if (first >= count)
RETURN(0);
+ if (count == 1 && dlm_req->lock_handle[0].cookie == 0)
+ RETURN(0);
+
/* There is no lock on the server at the replay time,
* skip lock cancelling to make replay tests to pass. */
if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
lock = ldlm_handle2lock(&dlm_req->lock_handle[i]);
if (!lock) {
LDLM_DEBUG_NOLOCK("server-side cancel handler stale "
- "lock (cookie "LPU64")",
+ "lock (cookie %llu)",
dlm_req->lock_handle[i].cookie);
continue;
}
res = lock->l_resource;
done++;
+ /* This code is an optimization to only attempt lock
+ * granting on the resource (that could be CPU-expensive)
+ * after we are done cancelling lock in that resource. */
if (res != pres) {
if (pres != NULL) {
ldlm_reprocess_all(pres);
}
pres = res;
}
+
+ if ((flags & LATF_STATS) && ldlm_is_ast_sent(lock)) {
+ long delay = cfs_time_sub(cfs_time_current_sec(),
+ lock->l_last_activity);
+ LDLM_DEBUG(lock, "server cancels blocked lock after "
+ CFS_DURATION_T"s", delay);
+ at_measured(&lock->l_export->exp_bl_lock_at, delay);
+ }
ldlm_lock_cancel(lock);
LDLM_LOCK_PUT(lock);
}
LDLM_DEBUG_NOLOCK("server-side cancel handler END");
RETURN(done);
}
+EXPORT_SYMBOL(ldlm_request_cancel);
+/**
+ * Main LDLM entry point for server code to cancel locks.
+ *
+ * Typically gets called from service handler on LDLM_CANCEL opc.
+ */
int ldlm_handle_cancel(struct ptlrpc_request *req)
{
struct ldlm_request *dlm_req;
if (rc)
RETURN(rc);
- if (!ldlm_request_cancel(req, dlm_req, 0))
- req->rq_status = ESTALE;
+ if (!ldlm_request_cancel(req, dlm_req, 0, LATF_STATS))
+ req->rq_status = LUSTRE_ESTALE;
RETURN(ptlrpc_reply(req));
}
#endif /* HAVE_SERVER_SUPPORT */
+/**
+ * Callback handler for receiving incoming blocking ASTs.
+ *
+ * This can only happen on client side.
+ */
void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
{
LDLM_DEBUG(lock, "client blocking AST callback handler");
lock_res_and_lock(lock);
- lock->l_flags |= LDLM_FL_CBPENDING;
+ ldlm_set_cbpending(lock);
- if (lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)
- lock->l_flags |= LDLM_FL_CANCEL;
+ if (ldlm_is_cancel_on_block(lock))
+ ldlm_set_cancel(lock);
do_ast = (!lock->l_readers && !lock->l_writers);
unlock_res_and_lock(lock);
EXIT;
}
+/**
+ * Callback handler for receiving incoming completion ASTs.
+ *
+ * This only can happen on client side.
+ */
static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
struct ldlm_namespace *ns,
struct ldlm_request *dlm_req,
struct ldlm_lock *lock)
{
+ struct list_head ast_list;
int lvb_len;
- CFS_LIST_HEAD(ast_list);
- ENTRY;
-
- LDLM_DEBUG(lock, "client completion callback handler START");
+ int rc = 0;
+ ENTRY;
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
- int to = cfs_time_seconds(1);
- while (to > 0) {
- cfs_schedule_timeout_and_set_state(
- CFS_TASK_INTERRUPTIBLE, to);
- if (lock->l_granted_mode == lock->l_req_mode ||
- lock->l_destroyed)
- break;
- }
- }
+ LDLM_DEBUG(lock, "client completion callback handler START");
+
+ INIT_LIST_HEAD(&ast_list);
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
+ int to = cfs_time_seconds(1);
+ while (to > 0) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(to);
+ if (lock->l_granted_mode == lock->l_req_mode ||
+ ldlm_is_destroyed(lock))
+ break;
+ }
+ }
lvb_len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB, RCL_CLIENT);
- if (lvb_len > 0) {
+ if (lvb_len < 0) {
+ LDLM_ERROR(lock, "Fail to get lvb_len, rc = %d", lvb_len);
+ GOTO(out, rc = lvb_len);
+ } else if (lvb_len > 0) {
if (lock->l_lvb_len > 0) {
/* for extent lock, lvb contains ost_lvb{}. */
LASSERT(lock->l_lvb_data != NULL);
- LASSERTF(lock->l_lvb_len == lvb_len,
- "preallocated %d, actual %d.\n",
- lock->l_lvb_len, lvb_len);
- } else { /* for layout lock, lvb has variable length */
- void *lvb_data;
- OBD_ALLOC(lvb_data, lvb_len);
- if (lvb_data == NULL)
- LDLM_ERROR(lock, "no memory.\n");
-
- lock_res_and_lock(lock);
- if (lvb_data == NULL) {
- lock->l_flags |= LDLM_FL_FAILED;
- } else {
- LASSERT(lock->l_lvb_data == NULL);
- lock->l_lvb_data = lvb_data;
- lock->l_lvb_len = lvb_len;
+ if (unlikely(lock->l_lvb_len < lvb_len)) {
+ LDLM_ERROR(lock, "Replied LVB is larger than "
+ "expectation, expected = %d, "
+ "replied = %d",
+ lock->l_lvb_len, lvb_len);
+ GOTO(out, rc = -EINVAL);
}
- unlock_res_and_lock(lock);
}
}
- lock_res_and_lock(lock);
- if (lock->l_destroyed ||
- lock->l_granted_mode == lock->l_req_mode) {
- /* bug 11300: the lock has already been granted */
- unlock_res_and_lock(lock);
- LDLM_DEBUG(lock, "Double grant race happened");
- LDLM_LOCK_RELEASE(lock);
- EXIT;
- return;
- }
+ lock_res_and_lock(lock);
+ if (ldlm_is_destroyed(lock) ||
+ lock->l_granted_mode == lock->l_req_mode) {
+ /* bug 11300: the lock has already been granted */
+ unlock_res_and_lock(lock);
+ LDLM_DEBUG(lock, "Double grant race happened");
+ GOTO(out, rc = 0);
+ }
- /* If we receive the completion AST before the actual enqueue returned,
- * then we might need to switch lock modes, resources, or extents. */
- if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
- lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
- LDLM_DEBUG(lock, "completion AST, new lock mode");
- }
+ /* If we receive the completion AST before the actual enqueue returned,
+ * then we might need to switch lock modes, resources, or extents. */
+ if (dlm_req->lock_desc.l_granted_mode != lock->l_req_mode) {
+ lock->l_req_mode = dlm_req->lock_desc.l_granted_mode;
+ LDLM_DEBUG(lock, "completion AST, new lock mode");
+ }
- if (lock->l_resource->lr_type != LDLM_PLAIN) {
- ldlm_convert_policy_to_local(req->rq_export,
- dlm_req->lock_desc.l_resource.lr_type,
- &dlm_req->lock_desc.l_policy_data,
- &lock->l_policy_data);
- LDLM_DEBUG(lock, "completion AST, new policy data");
- }
+ if (lock->l_resource->lr_type != LDLM_PLAIN) {
+ ldlm_convert_policy_to_local(req->rq_export,
+ dlm_req->lock_desc.l_resource.lr_type,
+ &dlm_req->lock_desc.l_policy_data,
+ &lock->l_policy_data);
+ LDLM_DEBUG(lock, "completion AST, new policy data");
+ }
ldlm_resource_unlink_lock(lock);
if (memcmp(&dlm_req->lock_desc.l_resource.lr_name,
&lock->l_resource->lr_name,
sizeof(lock->l_resource->lr_name)) != 0) {
unlock_res_and_lock(lock);
- if (ldlm_lock_change_resource(ns, lock,
- &dlm_req->lock_desc.l_resource.lr_name) != 0) {
- LDLM_ERROR(lock, "Failed to allocate resource");
- LDLM_LOCK_RELEASE(lock);
- EXIT;
- return;
- }
+ rc = ldlm_lock_change_resource(ns, lock,
+ &dlm_req->lock_desc.l_resource.lr_name);
+ if (rc < 0) {
+ LDLM_ERROR(lock, "Failed to allocate resource");
+ GOTO(out, rc);
+ }
LDLM_DEBUG(lock, "completion AST, new resource");
CERROR("change resource!\n");
lock_res_and_lock(lock);
}
if (dlm_req->lock_flags & LDLM_FL_AST_SENT) {
- /* BL_AST locks are not needed in lru.
- * let ldlm_cancel_lru() be fast. */
+ /* BL_AST locks are not needed in LRU.
+ * Let ldlm_cancel_lru() be fast. */
ldlm_lock_remove_from_lru(lock);
- lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
+ lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
LDLM_DEBUG(lock, "completion AST includes blocking AST");
}
- if (lock->l_lvb_len) {
- if (req_capsule_get_size(&req->rq_pill, &RMF_DLM_LVB,
- RCL_CLIENT) < lock->l_lvb_len) {
- LDLM_ERROR(lock, "completion AST did not contain "
- "expected LVB!");
- } else {
- void *lvb = req_capsule_client_get(&req->rq_pill,
- &RMF_DLM_LVB);
- memcpy(lock->l_lvb_data, lvb, lock->l_lvb_len);
- }
- }
+ if (lock->l_lvb_len > 0) {
+ rc = ldlm_fill_lvb(lock, &req->rq_pill, RCL_CLIENT,
+ lock->l_lvb_data, lvb_len);
+ if (rc < 0) {
+ unlock_res_and_lock(lock);
+ GOTO(out, rc);
+ }
+ }
ldlm_grant_lock(lock, &ast_list);
unlock_res_and_lock(lock);
LDLM_DEBUG_NOLOCK("client completion callback handler END (lock %p)",
lock);
- LDLM_LOCK_RELEASE(lock);
- EXIT;
+ GOTO(out, rc);
+
+out:
+ if (rc < 0) {
+ lock_res_and_lock(lock);
+ ldlm_set_failed(lock);
+ unlock_res_and_lock(lock);
+ wake_up(&lock->l_waitq);
+ }
+ LDLM_LOCK_RELEASE(lock);
}
+/**
+ * Callback handler for receiving incoming glimpse ASTs.
+ *
+ * This only can happen on client side. After handling the glimpse AST
+ * we also consider dropping the lock here if it is unused locally for a
+ * long time.
+ */
static void ldlm_handle_gl_callback(struct ptlrpc_request *req,
struct ldlm_namespace *ns,
struct ldlm_request *dlm_req,
return ptlrpc_reply(req);
}
-#ifdef __KERNEL__
-static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi, int mode)
+static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi,
+ enum ldlm_cancel_flags cancel_flags)
{
- struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
- ENTRY;
+ struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
+ ENTRY;
- cfs_spin_lock(&blp->blp_lock);
- if (blwi->blwi_lock && blwi->blwi_lock->l_flags & LDLM_FL_DISCARD_DATA) {
- /* add LDLM_FL_DISCARD_DATA requests to the priority list */
- cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
- } else {
- /* other blocking callbacks are added to the regular list */
- cfs_list_add_tail(&blwi->blwi_entry, &blp->blp_list);
- }
- cfs_spin_unlock(&blp->blp_lock);
+ spin_lock(&blp->blp_lock);
+ if (blwi->blwi_lock &&
+ ldlm_is_discard_data(blwi->blwi_lock)) {
+ /* add LDLM_FL_DISCARD_DATA requests to the priority list */
+ list_add_tail(&blwi->blwi_entry, &blp->blp_prio_list);
+ } else {
+ /* other blocking callbacks are added to the regular list */
+ list_add_tail(&blwi->blwi_entry, &blp->blp_list);
+ }
+ spin_unlock(&blp->blp_lock);
- cfs_waitq_signal(&blp->blp_waitq);
+ wake_up(&blp->blp_waitq);
- /* can not use blwi->blwi_mode as blwi could be already freed in
- LDLM_ASYNC mode */
- if (mode == LDLM_SYNC)
- cfs_wait_for_completion(&blwi->blwi_comp);
+ /* can not check blwi->blwi_flags as blwi could be already freed in
+ LCF_ASYNC mode */
+ if (!(cancel_flags & LCF_ASYNC))
+ wait_for_completion(&blwi->blwi_comp);
- RETURN(0);
+ RETURN(0);
}
static inline void init_blwi(struct ldlm_bl_work_item *blwi,
- struct ldlm_namespace *ns,
- struct ldlm_lock_desc *ld,
- cfs_list_t *cancels, int count,
- struct ldlm_lock *lock,
- int mode)
+ struct ldlm_namespace *ns,
+ struct ldlm_lock_desc *ld,
+ struct list_head *cancels, int count,
+ struct ldlm_lock *lock,
+ enum ldlm_cancel_flags cancel_flags)
{
- cfs_init_completion(&blwi->blwi_comp);
- CFS_INIT_LIST_HEAD(&blwi->blwi_head);
+ init_completion(&blwi->blwi_comp);
+ INIT_LIST_HEAD(&blwi->blwi_head);
- if (cfs_memory_pressure_get())
+ if (memory_pressure_get())
blwi->blwi_mem_pressure = 1;
blwi->blwi_ns = ns;
- blwi->blwi_mode = mode;
+ blwi->blwi_flags = cancel_flags;
if (ld != NULL)
blwi->blwi_ld = *ld;
if (count) {
- cfs_list_add(&blwi->blwi_head, cancels);
- cfs_list_del_init(cancels);
+ list_add(&blwi->blwi_head, cancels);
+ list_del_init(cancels);
blwi->blwi_count = count;
} else {
blwi->blwi_lock = lock;
}
}
+/**
+ * Queues a list of locks \a cancels containing \a count locks
+ * for later processing by a blocking thread. If \a count is zero,
+ * then the lock referenced as \a lock is queued instead.
+ *
+ * The blocking thread would then call ->l_blocking_ast callback in the lock.
+ * If list addition fails an error is returned and caller is supposed to
+ * call ->l_blocking_ast itself.
+ */
static int ldlm_bl_to_thread(struct ldlm_namespace *ns,
- struct ldlm_lock_desc *ld, struct ldlm_lock *lock,
- cfs_list_t *cancels, int count, int mode)
+ struct ldlm_lock_desc *ld,
+ struct ldlm_lock *lock,
+ struct list_head *cancels, int count,
+ enum ldlm_cancel_flags cancel_flags)
{
- ENTRY;
+ ENTRY;
- if (cancels && count == 0)
- RETURN(0);
+ if (cancels && count == 0)
+ RETURN(0);
- if (mode == LDLM_SYNC) {
- /* if it is synchronous call do minimum mem alloc, as it could
- * be triggered from kernel shrinker
- */
- struct ldlm_bl_work_item blwi;
- memset(&blwi, 0, sizeof(blwi));
- init_blwi(&blwi, ns, ld, cancels, count, lock, LDLM_SYNC);
- RETURN(__ldlm_bl_to_thread(&blwi, LDLM_SYNC));
- } else {
- struct ldlm_bl_work_item *blwi;
- OBD_ALLOC(blwi, sizeof(*blwi));
- if (blwi == NULL)
- RETURN(-ENOMEM);
- init_blwi(blwi, ns, ld, cancels, count, lock, LDLM_ASYNC);
+ if (cancel_flags & LCF_ASYNC) {
+ struct ldlm_bl_work_item *blwi;
- RETURN(__ldlm_bl_to_thread(blwi, LDLM_ASYNC));
- }
+ OBD_ALLOC(blwi, sizeof(*blwi));
+ if (blwi == NULL)
+ RETURN(-ENOMEM);
+ init_blwi(blwi, ns, ld, cancels, count, lock, cancel_flags);
+
+ RETURN(__ldlm_bl_to_thread(blwi, cancel_flags));
+ } else {
+ /* if it is synchronous call do minimum mem alloc, as it could
+ * be triggered from kernel shrinker
+ */
+ struct ldlm_bl_work_item blwi;
+
+ memset(&blwi, 0, sizeof(blwi));
+ init_blwi(&blwi, ns, ld, cancels, count, lock, cancel_flags);
+ RETURN(__ldlm_bl_to_thread(&blwi, cancel_flags));
+ }
}
-#endif
int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
- struct ldlm_lock *lock)
+ struct ldlm_lock *lock)
{
-#ifdef __KERNEL__
- RETURN(ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LDLM_ASYNC));
-#else
- RETURN(-ENOSYS);
-#endif
+ return ldlm_bl_to_thread(ns, ld, lock, NULL, 0, LCF_ASYNC);
}
int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
- cfs_list_t *cancels, int count, int mode)
+ struct list_head *cancels, int count,
+ enum ldlm_cancel_flags cancel_flags)
{
-#ifdef __KERNEL__
- RETURN(ldlm_bl_to_thread(ns, ld, NULL, cancels, count, mode));
-#else
- RETURN(-ENOSYS);
-#endif
+ return ldlm_bl_to_thread(ns, ld, NULL, cancels, count, cancel_flags);
+}
+
+int ldlm_bl_thread_wakeup(void)
+{
+ wake_up(&ldlm_state->ldlm_bl_pool->blp_waitq);
+ return 0;
}
/* Setinfo coming from Server (eg MDT) to Client (eg MDC)! */
}
static inline void ldlm_callback_errmsg(struct ptlrpc_request *req,
- const char *msg, int rc,
- struct lustre_handle *handle)
+ const char *msg, int rc,
+ const struct lustre_handle *handle)
{
DEBUG_REQ((req->rq_no_reply || rc) ? D_WARNING : D_DLMTRACE, req,
- "%s: [nid %s] [rc %d] [lock "LPX64"]",
+ "%s: [nid %s] [rc %d] [lock %#llx]",
msg, libcfs_id2str(req->rq_peer), rc,
handle ? handle->cookie : 0);
if (req->rq_no_reply)
LASSERT(req->rq_export != NULL);
LASSERT(req->rq_export->exp_obd != NULL);
- switch (lustre_msg_get_opc(req->rq_reqmsg)) {
- case LDLM_BL_CALLBACK:
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK))
- RETURN(0);
- break;
- case LDLM_CP_CALLBACK:
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK))
- RETURN(0);
- break;
- case LDLM_GL_CALLBACK:
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK))
- RETURN(0);
- break;
+ switch (lustre_msg_get_opc(req->rq_reqmsg)) {
+ case LDLM_BL_CALLBACK:
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_BL_CALLBACK_NET)) {
+ if (cfs_fail_err)
+ ldlm_callback_reply(req, -(int)cfs_fail_err);
+ RETURN(0);
+ }
+ break;
+ case LDLM_CP_CALLBACK:
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CP_CALLBACK_NET))
+ RETURN(0);
+ break;
+ case LDLM_GL_CALLBACK:
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_GL_CALLBACK_NET))
+ RETURN(0);
+ break;
case LDLM_SET_INFO:
rc = ldlm_handle_setinfo(req);
ldlm_callback_reply(req, rc);
RETURN(0);
- case OBD_LOG_CANCEL: /* remove this eventually - for 1.4.0 compat */
- CERROR("shouldn't be handling OBD_LOG_CANCEL on DLM thread\n");
- req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
- if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
- RETURN(0);
- rc = llog_origin_handle_cancel(req);
- if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
- RETURN(0);
- ldlm_callback_reply(req, rc);
- RETURN(0);
- case OBD_QC_CALLBACK:
- req_capsule_set(&req->rq_pill, &RQF_QC_CALLBACK);
- if (OBD_FAIL_CHECK(OBD_FAIL_OBD_QC_CALLBACK_NET))
- RETURN(0);
- rc = target_handle_qc_callback(req);
- ldlm_callback_reply(req, rc);
- RETURN(0);
- case QUOTA_DQACQ:
- case QUOTA_DQREL:
- /* reply in handler */
- req_capsule_set(&req->rq_pill, &RQF_MDS_QUOTA_DQACQ);
- rc = target_handle_dqacq_callback(req);
- RETURN(0);
case LLOG_ORIGIN_HANDLE_CREATE:
req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOGD_NET))
* which the server has already started a blocking callback on. */
if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE) &&
lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
- rc = ldlm_cli_cancel(&dlm_req->lock_handle[0]);
+ rc = ldlm_cli_cancel(&dlm_req->lock_handle[0], 0);
if (rc < 0)
CERROR("ldlm_cli_cancel: %d\n", rc);
}
lock = ldlm_handle2lock_long(&dlm_req->lock_handle[0], 0);
if (!lock) {
- CDEBUG(D_DLMTRACE, "callback on lock "LPX64" - lock "
+ CDEBUG(D_DLMTRACE, "callback on lock %#llx - lock "
"disappeared\n", dlm_req->lock_handle[0].cookie);
rc = ldlm_callback_reply(req, -EINVAL);
ldlm_callback_errmsg(req, "Operate with invalid parameter", rc,
RETURN(0);
}
- if ((lock->l_flags & LDLM_FL_FAIL_LOC) &&
+ if (ldlm_is_fail_loc(lock) &&
lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK)
OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
/* Copy hints/flags (e.g. LDLM_FL_DISCARD_DATA) from AST. */
lock_res_and_lock(lock);
- lock->l_flags |= (dlm_req->lock_flags & LDLM_AST_FLAGS);
- if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
- /* If somebody cancels lock and cache is already dropped,
- * or lock is failed before cp_ast received on client,
- * we can tell the server we have no lock. Otherwise, we
- * should send cancel after dropping the cache. */
- if (((lock->l_flags & LDLM_FL_CANCELING) &&
- (lock->l_flags & LDLM_FL_BL_DONE)) ||
- (lock->l_flags & LDLM_FL_FAILED)) {
- LDLM_DEBUG(lock, "callback on lock "
- LPX64" - lock disappeared\n",
- dlm_req->lock_handle[0].cookie);
- unlock_res_and_lock(lock);
- LDLM_LOCK_RELEASE(lock);
- rc = ldlm_callback_reply(req, -EINVAL);
- ldlm_callback_errmsg(req, "Operate on stale lock", rc,
- &dlm_req->lock_handle[0]);
- RETURN(0);
- }
- /* BL_AST locks are not needed in lru.
- * let ldlm_cancel_lru() be fast. */
- ldlm_lock_remove_from_lru(lock);
- lock->l_flags |= LDLM_FL_BL_AST;
- }
+ lock->l_flags |= ldlm_flags_from_wire(dlm_req->lock_flags &
+ LDLM_FL_AST_MASK);
+ if (lustre_msg_get_opc(req->rq_reqmsg) == LDLM_BL_CALLBACK) {
+ /* If somebody cancels lock and cache is already dropped,
+ * or lock is failed before cp_ast received on client,
+ * we can tell the server we have no lock. Otherwise, we
+ * should send cancel after dropping the cache. */
+ if ((ldlm_is_canceling(lock) && ldlm_is_bl_done(lock)) ||
+ ldlm_is_failed(lock)) {
+ LDLM_DEBUG(lock, "callback on lock %llx - lock disappeared",
+ dlm_req->lock_handle[0].cookie);
+ unlock_res_and_lock(lock);
+ LDLM_LOCK_RELEASE(lock);
+ rc = ldlm_callback_reply(req, -EINVAL);
+ ldlm_callback_errmsg(req, "Operate on stale lock", rc,
+ &dlm_req->lock_handle[0]);
+ RETURN(0);
+ }
+ /* BL_AST locks are not needed in LRU.
+ * Let ldlm_cancel_lru() be fast. */
+ ldlm_lock_remove_from_lru(lock);
+ ldlm_set_bl_ast(lock);
+ }
unlock_res_and_lock(lock);
/* We want the ost thread to get this reply so that it can respond
case LDLM_BL_CALLBACK:
CDEBUG(D_INODE, "blocking ast\n");
req_capsule_extend(&req->rq_pill, &RQF_LDLM_BL_CALLBACK);
- if (!(lock->l_flags & LDLM_FL_CANCEL_ON_BLOCK)) {
+ if (!ldlm_is_cancel_on_block(lock)) {
rc = ldlm_callback_reply(req, 0);
if (req->rq_no_reply || rc)
ldlm_callback_errmsg(req, "Normal process", rc,
}
#ifdef HAVE_SERVER_SUPPORT
+/**
+ * Main handler for canceld thread.
+ *
+ * Separated into its own thread to avoid deadlocks.
+ */
static int ldlm_cancel_handler(struct ptlrpc_request *req)
{
int rc;
struct ldlm_request *dlm_req;
CERROR("%s from %s arrived at %lu with bad export cookie "
- LPU64"\n",
+ "%llu\n",
ll_opcode2str(lustre_msg_get_opc(req->rq_reqmsg)),
libcfs_nid2str(req->rq_peer.nid),
req->rq_arrival_time.tv_sec,
case LDLM_CANCEL:
req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
CDEBUG(D_INODE, "cancel\n");
- if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
- RETURN(0);
+ if (CFS_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET) ||
+ CFS_FAIL_CHECK(OBD_FAIL_PTLRPC_CANCEL_RESEND) ||
+ CFS_FAIL_CHECK(OBD_FAIL_LDLM_BL_EVICT))
+ RETURN(0);
rc = ldlm_handle_cancel(req);
if (rc)
break;
RETURN(0);
- case OBD_LOG_CANCEL:
- req_capsule_set(&req->rq_pill, &RQF_LOG_CANCEL);
- if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_NET))
- RETURN(0);
- rc = llog_origin_handle_cancel(req);
- if (OBD_FAIL_CHECK(OBD_FAIL_OBD_LOG_CANCEL_REP))
- RETURN(0);
- ldlm_callback_reply(req, rc);
- RETURN(0);
default:
CERROR("invalid opcode %d\n",
lustre_msg_get_opc(req->rq_reqmsg));
if (lustre_handle_equal(&dlm_req->lock_handle[i],
&lockh)) {
DEBUG_REQ(D_RPCTRACE, req,
- "Prio raised by lock "LPX64".", lockh.cookie);
+ "Prio raised by lock %#llx.", lockh.cookie);
rc = 1;
break;
if (lock == NULL)
continue;
- rc = !!(lock->l_flags & LDLM_FL_AST_SENT);
+ rc = ldlm_is_ast_sent(lock) ? 1 : 0;
if (rc)
LDLM_DEBUG(lock, "hpreq cancel lock");
LDLM_LOCK_PUT(lock);
RETURN(0);
}
-int ldlm_revoke_lock_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
- cfs_hlist_node_t *hnode, void *data)
+static int ldlm_revoke_lock_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *data)
{
- cfs_list_t *rpc_list = data;
+ struct list_head *rpc_list = data;
struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
lock_res_and_lock(lock);
return 0;
}
- if (lock->l_flags & LDLM_FL_AST_SENT) {
+ if (ldlm_is_ast_sent(lock)) {
unlock_res_and_lock(lock);
return 0;
}
LASSERT(lock->l_blocking_ast);
LASSERT(!lock->l_blocking_lock);
- lock->l_flags |= LDLM_FL_AST_SENT;
+ ldlm_set_ast_sent(lock);
if (lock->l_export && lock->l_export->exp_lock_hash) {
/* NB: it's safe to call cfs_hash_del() even lock isn't
* in exp_lock_hash. */
+ /* In the function below, .hs_keycmp resolves to
+ * ldlm_export_lock_keycmp() */
+ /* coverity[overrun-buffer-val] */
cfs_hash_del(lock->l_export->exp_lock_hash,
&lock->l_remote_handle, &lock->l_exp_hash);
}
- cfs_list_add_tail(&lock->l_rk_ast, rpc_list);
+ list_add_tail(&lock->l_rk_ast, rpc_list);
LDLM_LOCK_GET(lock);
unlock_res_and_lock(lock);
void ldlm_revoke_export_locks(struct obd_export *exp)
{
- cfs_list_t rpc_list;
- ENTRY;
+ struct list_head rpc_list;
+ ENTRY;
- CFS_INIT_LIST_HEAD(&rpc_list);
- cfs_hash_for_each_empty(exp->exp_lock_hash,
- ldlm_revoke_lock_cb, &rpc_list);
- ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
- LDLM_WORK_REVOKE_AST);
+ INIT_LIST_HEAD(&rpc_list);
+ cfs_hash_for_each_nolock(exp->exp_lock_hash,
+ ldlm_revoke_lock_cb, &rpc_list, 0);
+ ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
+ LDLM_WORK_REVOKE_AST);
- EXIT;
+ EXIT;
}
+EXPORT_SYMBOL(ldlm_revoke_export_locks);
#endif /* HAVE_SERVER_SUPPORT */
-#ifdef __KERNEL__
-static struct ldlm_bl_work_item *ldlm_bl_get_work(struct ldlm_bl_pool *blp)
+static int ldlm_bl_get_work(struct ldlm_bl_pool *blp,
+ struct ldlm_bl_work_item **p_blwi,
+ struct obd_export **p_exp)
{
- struct ldlm_bl_work_item *blwi = NULL;
- static unsigned int num_bl = 0;
+ struct ldlm_bl_work_item *blwi = NULL;
+ static unsigned int num_bl = 0;
+ static unsigned int num_stale;
+ int num_th = atomic_read(&blp->blp_num_threads);
- cfs_spin_lock(&blp->blp_lock);
- /* process a request from the blp_list at least every blp_num_threads */
- if (!cfs_list_empty(&blp->blp_list) &&
- (cfs_list_empty(&blp->blp_prio_list) || num_bl == 0))
- blwi = cfs_list_entry(blp->blp_list.next,
- struct ldlm_bl_work_item, blwi_entry);
- else
- if (!cfs_list_empty(&blp->blp_prio_list))
- blwi = cfs_list_entry(blp->blp_prio_list.next,
- struct ldlm_bl_work_item,
- blwi_entry);
-
- if (blwi) {
- if (++num_bl >= cfs_atomic_read(&blp->blp_num_threads))
- num_bl = 0;
- cfs_list_del(&blwi->blwi_entry);
- }
- cfs_spin_unlock(&blp->blp_lock);
+ *p_exp = obd_stale_export_get();
+
+ spin_lock(&blp->blp_lock);
+ if (*p_exp != NULL) {
+ if (num_th == 1 || ++num_stale < num_th) {
+ spin_unlock(&blp->blp_lock);
+ return 1;
+ } else {
+ num_stale = 0;
+ }
+ }
+
+ /* process a request from the blp_list at least every blp_num_threads */
+ if (!list_empty(&blp->blp_list) &&
+ (list_empty(&blp->blp_prio_list) || num_bl == 0))
+ blwi = list_entry(blp->blp_list.next,
+ struct ldlm_bl_work_item, blwi_entry);
+ else
+ if (!list_empty(&blp->blp_prio_list))
+ blwi = list_entry(blp->blp_prio_list.next,
+ struct ldlm_bl_work_item,
+ blwi_entry);
+
+ if (blwi) {
+ if (++num_bl >= num_th)
+ num_bl = 0;
+ list_del(&blwi->blwi_entry);
+ }
+ spin_unlock(&blp->blp_lock);
+ *p_blwi = blwi;
- return blwi;
+ if (*p_exp != NULL && *p_blwi != NULL) {
+ obd_stale_export_put(*p_exp);
+ *p_exp = NULL;
+ }
+
+ return (*p_blwi != NULL || *p_exp != NULL) ? 1 : 0;
}
/* This only contains temporary data until the thread starts */
struct ldlm_bl_thread_data {
- char bltd_name[CFS_CURPROC_COMM_MAX];
- struct ldlm_bl_pool *bltd_blp;
- cfs_completion_t bltd_comp;
- int bltd_num;
+ struct ldlm_bl_pool *bltd_blp;
+ struct completion bltd_comp;
+ int bltd_num;
};
static int ldlm_bl_thread_main(void *arg);
-static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp)
+static int ldlm_bl_thread_start(struct ldlm_bl_pool *blp, bool check_busy)
{
- struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
- int rc;
+ struct ldlm_bl_thread_data bltd = { .bltd_blp = blp };
+ struct task_struct *task;
- cfs_init_completion(&bltd.bltd_comp);
- rc = cfs_create_thread(ldlm_bl_thread_main, &bltd, 0);
- if (rc < 0) {
- CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %d\n",
- cfs_atomic_read(&blp->blp_num_threads), rc);
- return rc;
- }
- cfs_wait_for_completion(&bltd.bltd_comp);
+ init_completion(&bltd.bltd_comp);
- return 0;
+ bltd.bltd_num = atomic_inc_return(&blp->blp_num_threads);
+ if (bltd.bltd_num >= blp->blp_max_threads) {
+ atomic_dec(&blp->blp_num_threads);
+ return 0;
+ }
+
+ LASSERTF(bltd.bltd_num > 0, "thread num:%d\n", bltd.bltd_num);
+ if (check_busy &&
+ atomic_read(&blp->blp_busy_threads) < (bltd.bltd_num - 1)) {
+ atomic_dec(&blp->blp_num_threads);
+ return 0;
+ }
+
+ task = kthread_run(ldlm_bl_thread_main, &bltd, "ldlm_bl_%02d",
+ bltd.bltd_num);
+ if (IS_ERR(task)) {
+ CERROR("cannot start LDLM thread ldlm_bl_%02d: rc %ld\n",
+ bltd.bltd_num, PTR_ERR(task));
+ atomic_dec(&blp->blp_num_threads);
+ return PTR_ERR(task);
+ }
+ wait_for_completion(&bltd.bltd_comp);
+
+ return 0;
}
+/* Not fatal if racy and have a few too many threads */
+static int ldlm_bl_thread_need_create(struct ldlm_bl_pool *blp,
+ struct ldlm_bl_work_item *blwi)
+{
+ if (atomic_read(&blp->blp_num_threads) >= blp->blp_max_threads)
+ return 0;
+
+ if (atomic_read(&blp->blp_busy_threads) <
+ atomic_read(&blp->blp_num_threads))
+ return 0;
+
+ if (blwi != NULL && (blwi->blwi_ns == NULL ||
+ blwi->blwi_mem_pressure))
+ return 0;
+
+ return 1;
+}
+
+static int ldlm_bl_thread_blwi(struct ldlm_bl_pool *blp,
+ struct ldlm_bl_work_item *blwi)
+{
+ ENTRY;
+
+ if (blwi->blwi_ns == NULL)
+ /* added by ldlm_cleanup() */
+ RETURN(LDLM_ITER_STOP);
+
+ if (blwi->blwi_mem_pressure)
+ memory_pressure_set();
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_PAUSE_CANCEL2, 4);
+
+ if (blwi->blwi_count) {
+ int count;
+ /* The special case when we cancel locks in lru
+ * asynchronously, we pass the list of locks here.
+ * Thus locks are marked LDLM_FL_CANCELING, but NOT
+ * canceled locally yet. */
+ count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
+ blwi->blwi_count,
+ LCF_BL_AST);
+ ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL,
+ blwi->blwi_flags);
+ } else {
+ ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
+ blwi->blwi_lock);
+ }
+ if (blwi->blwi_mem_pressure)
+ memory_pressure_clr();
+
+ if (blwi->blwi_flags & LCF_ASYNC)
+ OBD_FREE(blwi, sizeof(*blwi));
+ else
+ complete(&blwi->blwi_comp);
+
+ RETURN(0);
+}
+
+/**
+ * Cancel stale locks on export. Cancel blocked locks first.
+ * If the given export has blocked locks, the next in the list may have
+ * them too, thus cancel not blocked locks only if the current export has
+ * no blocked locks.
+ **/
+static int ldlm_bl_thread_exports(struct ldlm_bl_pool *blp,
+ struct obd_export *exp)
+{
+ int num;
+ ENTRY;
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_BL_EVICT, 4);
+
+ num = ldlm_export_cancel_blocked_locks(exp);
+ if (num == 0)
+ ldlm_export_cancel_locks(exp);
+
+ obd_stale_export_put(exp);
+
+ RETURN(0);
+}
+
+
+/**
+ * Main blocking requests processing thread.
+ *
+ * Callers put locks into its queue by calling ldlm_bl_to_thread.
+ * This thread in the end ends up doing actual call to ->l_blocking_ast
+ * for queued locks.
+ */
static int ldlm_bl_thread_main(void *arg)
{
struct ldlm_bl_pool *blp;
+ struct ldlm_bl_thread_data *bltd = arg;
ENTRY;
- {
- struct ldlm_bl_thread_data *bltd = arg;
+ blp = bltd->bltd_blp;
- blp = bltd->bltd_blp;
+ complete(&bltd->bltd_comp);
+ /* cannot use bltd after this, it is only on caller's stack */
- bltd->bltd_num =
- cfs_atomic_inc_return(&blp->blp_num_threads) - 1;
- cfs_atomic_inc(&blp->blp_busy_threads);
-
- snprintf(bltd->bltd_name, sizeof(bltd->bltd_name) - 1,
- "ldlm_bl_%02d", bltd->bltd_num);
- cfs_daemonize(bltd->bltd_name);
-
- cfs_complete(&bltd->bltd_comp);
- /* cannot use bltd after this, it is only on caller's stack */
- }
+ while (1) {
+ struct l_wait_info lwi = { 0 };
+ struct ldlm_bl_work_item *blwi = NULL;
+ struct obd_export *exp = NULL;
+ int rc;
- while (1) {
- struct l_wait_info lwi = { 0 };
- struct ldlm_bl_work_item *blwi = NULL;
- int busy;
+ rc = ldlm_bl_get_work(blp, &blwi, &exp);
- blwi = ldlm_bl_get_work(blp);
+ if (rc == 0)
+ l_wait_event_exclusive(blp->blp_waitq,
+ ldlm_bl_get_work(blp, &blwi,
+ &exp),
+ &lwi);
+ atomic_inc(&blp->blp_busy_threads);
- if (blwi == NULL) {
- cfs_atomic_dec(&blp->blp_busy_threads);
- l_wait_event_exclusive(blp->blp_waitq,
- (blwi = ldlm_bl_get_work(blp)) != NULL,
- &lwi);
- busy = cfs_atomic_inc_return(&blp->blp_busy_threads);
- } else {
- busy = cfs_atomic_read(&blp->blp_busy_threads);
- }
+ if (ldlm_bl_thread_need_create(blp, blwi))
+ /* discard the return value, we tried */
+ ldlm_bl_thread_start(blp, true);
- if (blwi->blwi_ns == NULL)
- /* added by ldlm_cleanup() */
- break;
+ if (exp)
+ rc = ldlm_bl_thread_exports(blp, exp);
+ else if (blwi)
+ rc = ldlm_bl_thread_blwi(blp, blwi);
- /* Not fatal if racy and have a few too many threads */
- if (unlikely(busy < blp->blp_max_threads &&
- busy >= cfs_atomic_read(&blp->blp_num_threads) &&
- !blwi->blwi_mem_pressure))
- /* discard the return value, we tried */
- ldlm_bl_thread_start(blp);
-
- if (blwi->blwi_mem_pressure)
- cfs_memory_pressure_set();
-
- if (blwi->blwi_count) {
- int count;
- /* The special case when we cancel locks in lru
- * asynchronously, we pass the list of locks here.
- * Thus locks are marked LDLM_FL_CANCELING, but NOT
- * canceled locally yet. */
- count = ldlm_cli_cancel_list_local(&blwi->blwi_head,
- blwi->blwi_count,
- LCF_BL_AST);
- ldlm_cli_cancel_list(&blwi->blwi_head, count, NULL, 0);
- } else {
- ldlm_handle_bl_callback(blwi->blwi_ns, &blwi->blwi_ld,
- blwi->blwi_lock);
- }
- if (blwi->blwi_mem_pressure)
- cfs_memory_pressure_clr();
+ atomic_dec(&blp->blp_busy_threads);
- if (blwi->blwi_mode == LDLM_ASYNC)
- OBD_FREE(blwi, sizeof(*blwi));
- else
- cfs_complete(&blwi->blwi_comp);
- }
+ if (rc == LDLM_ITER_STOP)
+ break;
+ }
- cfs_atomic_dec(&blp->blp_busy_threads);
- cfs_atomic_dec(&blp->blp_num_threads);
- cfs_complete(&blp->blp_comp);
- RETURN(0);
+ atomic_dec(&blp->blp_num_threads);
+ complete(&blp->blp_comp);
+ RETURN(0);
}
-#endif
static int ldlm_setup(void);
static int ldlm_cleanup(void);
{
int rc = 0;
ENTRY;
- cfs_mutex_lock(&ldlm_ref_mutex);
+ mutex_lock(&ldlm_ref_mutex);
if (++ldlm_refcount == 1) {
rc = ldlm_setup();
if (rc)
ldlm_refcount--;
}
- cfs_mutex_unlock(&ldlm_ref_mutex);
+ mutex_unlock(&ldlm_ref_mutex);
RETURN(rc);
}
void ldlm_put_ref(void)
{
ENTRY;
- cfs_mutex_lock(&ldlm_ref_mutex);
+ mutex_lock(&ldlm_ref_mutex);
if (ldlm_refcount == 1) {
int rc = ldlm_cleanup();
if (rc)
} else {
ldlm_refcount--;
}
- cfs_mutex_unlock(&ldlm_ref_mutex);
+ mutex_unlock(&ldlm_ref_mutex);
EXIT;
}
* Export handle<->lock hash operations.
*/
static unsigned
-ldlm_export_lock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
+ldlm_export_lock_hash(struct cfs_hash *hs, const void *key, unsigned mask)
{
return cfs_hash_u64_hash(((struct lustre_handle *)key)->cookie, mask);
}
static void *
-ldlm_export_lock_key(cfs_hlist_node_t *hnode)
+ldlm_export_lock_key(struct hlist_node *hnode)
{
struct ldlm_lock *lock;
- lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
+ lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
return &lock->l_remote_handle;
}
static void
-ldlm_export_lock_keycpy(cfs_hlist_node_t *hnode, void *key)
+ldlm_export_lock_keycpy(struct hlist_node *hnode, void *key)
{
struct ldlm_lock *lock;
- lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
+ lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
lock->l_remote_handle = *(struct lustre_handle *)key;
}
static int
-ldlm_export_lock_keycmp(const void *key, cfs_hlist_node_t *hnode)
+ldlm_export_lock_keycmp(const void *key, struct hlist_node *hnode)
{
return lustre_handle_equal(ldlm_export_lock_key(hnode), key);
}
static void *
-ldlm_export_lock_object(cfs_hlist_node_t *hnode)
+ldlm_export_lock_object(struct hlist_node *hnode)
{
- return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
+ return hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
}
static void
-ldlm_export_lock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+ldlm_export_lock_get(struct cfs_hash *hs, struct hlist_node *hnode)
{
struct ldlm_lock *lock;
- lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
+ lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
LDLM_LOCK_GET(lock);
}
static void
-ldlm_export_lock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+ldlm_export_lock_put(struct cfs_hash *hs, struct hlist_node *hnode)
{
struct ldlm_lock *lock;
- lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
+ lock = hlist_entry(hnode, struct ldlm_lock, l_exp_hash);
LDLM_LOCK_RELEASE(lock);
}
-static cfs_hash_ops_t ldlm_export_lock_ops = {
+static struct cfs_hash_ops ldlm_export_lock_ops = {
.hs_hash = ldlm_export_lock_hash,
.hs_key = ldlm_export_lock_key,
.hs_keycmp = ldlm_export_lock_keycmp,
int ldlm_init_export(struct obd_export *exp)
{
+ int rc;
ENTRY;
exp->exp_lock_hash =
if (!exp->exp_lock_hash)
RETURN(-ENOMEM);
+ rc = ldlm_init_flock_export(exp);
+ if (rc)
+ GOTO(err, rc);
+
RETURN(0);
+err:
+ ldlm_destroy_export(exp);
+ RETURN(rc);
}
EXPORT_SYMBOL(ldlm_init_export);
static int ldlm_setup(void)
{
static struct ptlrpc_service_conf conf;
- struct ldlm_bl_pool *blp = NULL;
- int rc = 0;
-#ifdef __KERNEL__
- int i;
-#endif
+ struct ldlm_bl_pool *blp = NULL;
+#ifdef HAVE_SERVER_SUPPORT
+ struct task_struct *task;
+#endif /* HAVE_SERVER_SUPPORT */
+ int i;
+ int rc = 0;
+
ENTRY;
if (ldlm_state != NULL)
if (ldlm_state == NULL)
RETURN(-ENOMEM);
-#ifdef LPROCFS
+#ifdef CONFIG_PROC_FS
rc = ldlm_proc_setup();
if (rc != 0)
GOTO(out, rc);
-#endif
+#endif /* CONFIG_PROC_FS */
memset(&conf, 0, sizeof(conf));
conf = (typeof(conf)) {
.psc_name = "ldlm_cbd",
.psc_watchdog_factor = 2,
.psc_buf = {
- .bc_nbufs = LDLM_NBUFS,
+ .bc_nbufs = LDLM_CLIENT_NBUFS,
.bc_buf_size = LDLM_BUFSIZE,
.bc_req_max_size = LDLM_MAXREQSIZE,
.bc_rep_max_size = LDLM_MAXREPSIZE,
.psc_name = "ldlm_canceld",
.psc_watchdog_factor = 6,
.psc_buf = {
- .bc_nbufs = LDLM_NBUFS,
+ .bc_nbufs = LDLM_SERVER_NBUFS,
.bc_buf_size = LDLM_BUFSIZE,
.bc_req_max_size = LDLM_MAXREQSIZE,
.bc_rep_max_size = LDLM_MAXREPSIZE,
ldlm_state->ldlm_cancel_service = NULL;
GOTO(out, rc);
}
-#endif
+#endif /* HAVE_SERVER_SUPPORT */
OBD_ALLOC(blp, sizeof(*blp));
if (blp == NULL)
GOTO(out, rc = -ENOMEM);
- ldlm_state->ldlm_bl_pool = blp;
+ ldlm_state->ldlm_bl_pool = blp;
- cfs_spin_lock_init(&blp->blp_lock);
- CFS_INIT_LIST_HEAD(&blp->blp_list);
- CFS_INIT_LIST_HEAD(&blp->blp_prio_list);
- cfs_waitq_init(&blp->blp_waitq);
- cfs_atomic_set(&blp->blp_num_threads, 0);
- cfs_atomic_set(&blp->blp_busy_threads, 0);
+ spin_lock_init(&blp->blp_lock);
+ INIT_LIST_HEAD(&blp->blp_list);
+ INIT_LIST_HEAD(&blp->blp_prio_list);
+ init_waitqueue_head(&blp->blp_waitq);
+ atomic_set(&blp->blp_num_threads, 0);
+ atomic_set(&blp->blp_busy_threads, 0);
-#ifdef __KERNEL__
if (ldlm_num_threads == 0) {
blp->blp_min_threads = LDLM_NTHRS_INIT;
blp->blp_max_threads = LDLM_NTHRS_MAX;
}
for (i = 0; i < blp->blp_min_threads; i++) {
- rc = ldlm_bl_thread_start(blp);
+ rc = ldlm_bl_thread_start(blp, false);
if (rc < 0)
GOTO(out, rc);
}
-# ifdef HAVE_SERVER_SUPPORT
- CFS_INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
- expired_lock_thread.elt_state = ELT_STOPPED;
- cfs_waitq_init(&expired_lock_thread.elt_waitq);
+#ifdef HAVE_SERVER_SUPPORT
+ INIT_LIST_HEAD(&expired_lock_thread.elt_expired_locks);
+ expired_lock_thread.elt_state = ELT_STOPPED;
+ init_waitqueue_head(&expired_lock_thread.elt_waitq);
- CFS_INIT_LIST_HEAD(&waiting_locks_list);
- cfs_spin_lock_init(&waiting_locks_spinlock);
- cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, 0);
+ INIT_LIST_HEAD(&waiting_locks_list);
+ spin_lock_init(&waiting_locks_spinlock);
+ cfs_timer_init(&waiting_locks_timer, waiting_locks_callback, NULL);
- rc = cfs_create_thread(expired_lock_main, NULL, CFS_DAEMON_FLAGS);
- if (rc < 0) {
+ task = kthread_run(expired_lock_main, NULL, "ldlm_elt");
+ if (IS_ERR(task)) {
+ rc = PTR_ERR(task);
CERROR("Cannot start ldlm expired-lock thread: %d\n", rc);
GOTO(out, rc);
}
- cfs_wait_event(expired_lock_thread.elt_waitq,
- expired_lock_thread.elt_state == ELT_READY);
-# endif /* HAVE_SERVER_SUPPORT */
+ wait_event(expired_lock_thread.elt_waitq,
+ expired_lock_thread.elt_state == ELT_READY);
+#endif /* HAVE_SERVER_SUPPORT */
rc = ldlm_pools_init();
if (rc) {
CERROR("Failed to initialize LDLM pools: %d\n", rc);
GOTO(out, rc);
}
-#endif
+
+ rc = ldlm_reclaim_setup();
+ if (rc) {
+ CERROR("Failed to setup reclaim thread: rc = %d\n", rc);
+ GOTO(out, rc);
+ }
RETURN(0);
out:
{
ENTRY;
- if (!cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
- !cfs_list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
+ if (!list_empty(ldlm_namespace_list(LDLM_NAMESPACE_SERVER)) ||
+ !list_empty(ldlm_namespace_list(LDLM_NAMESPACE_CLIENT))) {
CERROR("ldlm still has namespaces; clean these up first.\n");
ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
ldlm_dump_all_namespaces(LDLM_NAMESPACE_CLIENT, D_DLMTRACE);
RETURN(-EBUSY);
}
-#ifdef __KERNEL__
- ldlm_pools_fini();
+ ldlm_reclaim_cleanup();
+ ldlm_pools_fini();
if (ldlm_state->ldlm_bl_pool != NULL) {
struct ldlm_bl_pool *blp = ldlm_state->ldlm_bl_pool;
- while (cfs_atomic_read(&blp->blp_num_threads) > 0) {
+ while (atomic_read(&blp->blp_num_threads) > 0) {
struct ldlm_bl_work_item blwi = { .blwi_ns = NULL };
- cfs_init_completion(&blp->blp_comp);
+ init_completion(&blp->blp_comp);
- cfs_spin_lock(&blp->blp_lock);
- cfs_list_add_tail(&blwi.blwi_entry, &blp->blp_list);
- cfs_waitq_signal(&blp->blp_waitq);
- cfs_spin_unlock(&blp->blp_lock);
+ spin_lock(&blp->blp_lock);
+ list_add_tail(&blwi.blwi_entry, &blp->blp_list);
+ wake_up(&blp->blp_waitq);
+ spin_unlock(&blp->blp_lock);
- cfs_wait_for_completion(&blp->blp_comp);
+ wait_for_completion(&blp->blp_comp);
}
OBD_FREE(blp, sizeof(*blp));
}
-#endif /* __KERNEL__ */
if (ldlm_state->ldlm_cb_service != NULL)
ptlrpc_unregister_service(ldlm_state->ldlm_cb_service);
-# ifdef HAVE_SERVER_SUPPORT
+#ifdef HAVE_SERVER_SUPPORT
if (ldlm_state->ldlm_cancel_service != NULL)
ptlrpc_unregister_service(ldlm_state->ldlm_cancel_service);
-# endif
+#endif
-#ifdef __KERNEL__
ldlm_proc_cleanup();
-# ifdef HAVE_SERVER_SUPPORT
+#ifdef HAVE_SERVER_SUPPORT
if (expired_lock_thread.elt_state != ELT_STOPPED) {
expired_lock_thread.elt_state = ELT_TERMINATE;
- cfs_waitq_signal(&expired_lock_thread.elt_waitq);
- cfs_wait_event(expired_lock_thread.elt_waitq,
+ wake_up(&expired_lock_thread.elt_waitq);
+ wait_event(expired_lock_thread.elt_waitq,
expired_lock_thread.elt_state == ELT_STOPPED);
}
-# endif
-#endif /* __KERNEL__ */
+#endif
OBD_FREE(ldlm_state, sizeof(*ldlm_state));
ldlm_state = NULL;
int ldlm_init(void)
{
- cfs_mutex_init(&ldlm_ref_mutex);
- cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
- cfs_mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
- ldlm_resource_slab = cfs_mem_cache_create("ldlm_resources",
- sizeof(struct ldlm_resource), 0,
- CFS_SLAB_HWCACHE_ALIGN);
- if (ldlm_resource_slab == NULL)
- return -ENOMEM;
-
- ldlm_lock_slab = cfs_mem_cache_create("ldlm_locks",
- sizeof(struct ldlm_lock), 0,
- CFS_SLAB_HWCACHE_ALIGN | CFS_SLAB_DESTROY_BY_RCU);
- if (ldlm_lock_slab == NULL) {
- cfs_mem_cache_destroy(ldlm_resource_slab);
- return -ENOMEM;
- }
+ mutex_init(&ldlm_ref_mutex);
+ mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_SERVER));
+ mutex_init(ldlm_namespace_lock(LDLM_NAMESPACE_CLIENT));
+
+ INIT_LIST_HEAD(&ldlm_srv_namespace_list);
+ INIT_LIST_HEAD(&ldlm_cli_active_namespace_list);
+ INIT_LIST_HEAD(&ldlm_cli_inactive_namespace_list);
+
+ ldlm_resource_slab = kmem_cache_create("ldlm_resources",
+ sizeof(struct ldlm_resource), 0,
+ SLAB_HWCACHE_ALIGN, NULL);
+ if (ldlm_resource_slab == NULL)
+ return -ENOMEM;
+
+ ldlm_lock_slab = kmem_cache_create("ldlm_locks",
+ sizeof(struct ldlm_lock), 0,
+ SLAB_HWCACHE_ALIGN | SLAB_DESTROY_BY_RCU, NULL);
+ if (ldlm_lock_slab == NULL)
+ goto out_resource;
- ldlm_interval_slab = cfs_mem_cache_create("interval_node",
+ ldlm_interval_slab = kmem_cache_create("interval_node",
sizeof(struct ldlm_interval),
- 0, CFS_SLAB_HWCACHE_ALIGN);
- if (ldlm_interval_slab == NULL) {
- cfs_mem_cache_destroy(ldlm_resource_slab);
- cfs_mem_cache_destroy(ldlm_lock_slab);
- return -ENOMEM;
- }
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (ldlm_interval_slab == NULL)
+ goto out_lock;
+
+ ldlm_interval_tree_slab = kmem_cache_create("interval_tree",
+ sizeof(struct ldlm_interval_tree) * LCK_MODE_NUM,
+ 0, SLAB_HWCACHE_ALIGN, NULL);
+ if (ldlm_interval_tree_slab == NULL)
+ goto out_interval;
+
#if LUSTRE_TRACKS_LOCK_EXP_REFS
- class_export_dump_hook = ldlm_dump_export_locks;
+ class_export_dump_hook = ldlm_dump_export_locks;
#endif
- return 0;
+ return 0;
+
+out_interval:
+ kmem_cache_destroy(ldlm_interval_slab);
+out_lock:
+ kmem_cache_destroy(ldlm_lock_slab);
+out_resource:
+ kmem_cache_destroy(ldlm_resource_slab);
+
+ return -ENOMEM;
}
void ldlm_exit(void)
{
- int rc;
- if (ldlm_refcount)
- CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
- rc = cfs_mem_cache_destroy(ldlm_resource_slab);
- LASSERTF(rc == 0, "couldn't free ldlm resource slab\n");
-#ifdef __KERNEL__
- /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
- * synchronize_rcu() to wait a grace period elapsed, so that
- * ldlm_lock_free() get a chance to be called. */
- synchronize_rcu();
-#endif
- rc = cfs_mem_cache_destroy(ldlm_lock_slab);
- LASSERTF(rc == 0, "couldn't free ldlm lock slab\n");
- rc = cfs_mem_cache_destroy(ldlm_interval_slab);
- LASSERTF(rc == 0, "couldn't free interval node slab\n");
+ if (ldlm_refcount)
+ CERROR("ldlm_refcount is %d in ldlm_exit!\n", ldlm_refcount);
+ kmem_cache_destroy(ldlm_resource_slab);
+ /* ldlm_lock_put() use RCU to call ldlm_lock_free, so need call
+ * synchronize_rcu() to wait a grace period elapsed, so that
+ * ldlm_lock_free() get a chance to be called. */
+ synchronize_rcu();
+ kmem_cache_destroy(ldlm_lock_slab);
+ kmem_cache_destroy(ldlm_interval_slab);
+ kmem_cache_destroy(ldlm_interval_tree_slab);
}
-
-/* ldlm_extent.c */
-EXPORT_SYMBOL(ldlm_extent_shift_kms);
-
-/* ldlm_lock.c */
-#ifdef HAVE_SERVER_SUPPORT
-EXPORT_SYMBOL(ldlm_get_processing_policy);
-#endif
-EXPORT_SYMBOL(ldlm_lock2desc);
-EXPORT_SYMBOL(ldlm_register_intent);
-EXPORT_SYMBOL(ldlm_lockname);
-EXPORT_SYMBOL(ldlm_typename);
-EXPORT_SYMBOL(ldlm_lock2handle);
-EXPORT_SYMBOL(__ldlm_handle2lock);
-EXPORT_SYMBOL(ldlm_lock_get);
-EXPORT_SYMBOL(ldlm_lock_put);
-EXPORT_SYMBOL(ldlm_lock_match);
-EXPORT_SYMBOL(ldlm_lock_cancel);
-EXPORT_SYMBOL(ldlm_lock_addref);
-EXPORT_SYMBOL(ldlm_lock_addref_try);
-EXPORT_SYMBOL(ldlm_lock_decref);
-EXPORT_SYMBOL(ldlm_lock_decref_and_cancel);
-EXPORT_SYMBOL(ldlm_lock_change_resource);
-EXPORT_SYMBOL(ldlm_it2str);
-EXPORT_SYMBOL(ldlm_lock_dump_handle);
-EXPORT_SYMBOL(ldlm_reprocess_all_ns);
-EXPORT_SYMBOL(ldlm_lock_allow_match_locked);
-EXPORT_SYMBOL(ldlm_lock_allow_match);
-EXPORT_SYMBOL(ldlm_lock_downgrade);
-EXPORT_SYMBOL(ldlm_lock_convert);
-
-/* ldlm_request.c */
-EXPORT_SYMBOL(ldlm_completion_ast_async);
-EXPORT_SYMBOL(ldlm_blocking_ast_nocheck);
-EXPORT_SYMBOL(ldlm_completion_ast);
-EXPORT_SYMBOL(ldlm_blocking_ast);
-EXPORT_SYMBOL(ldlm_glimpse_ast);
-EXPORT_SYMBOL(ldlm_expired_completion_wait);
-EXPORT_SYMBOL(ldlm_prep_enqueue_req);
-EXPORT_SYMBOL(ldlm_prep_elc_req);
-EXPORT_SYMBOL(ldlm_cli_convert);
-EXPORT_SYMBOL(ldlm_cli_enqueue);
-EXPORT_SYMBOL(ldlm_cli_enqueue_fini);
-EXPORT_SYMBOL(ldlm_cli_enqueue_local);
-EXPORT_SYMBOL(ldlm_cli_cancel);
-EXPORT_SYMBOL(ldlm_cli_cancel_unused);
-EXPORT_SYMBOL(ldlm_cli_cancel_unused_resource);
-EXPORT_SYMBOL(ldlm_cli_cancel_req);
-EXPORT_SYMBOL(ldlm_replay_locks);
-EXPORT_SYMBOL(ldlm_resource_foreach);
-EXPORT_SYMBOL(ldlm_namespace_foreach);
-EXPORT_SYMBOL(ldlm_resource_iterate);
-EXPORT_SYMBOL(ldlm_cancel_resource_local);
-EXPORT_SYMBOL(ldlm_cli_cancel_list_local);
-EXPORT_SYMBOL(ldlm_cli_cancel_list);
-
-/* ldlm_lockd.c */
-#ifdef HAVE_SERVER_SUPPORT
-EXPORT_SYMBOL(ldlm_server_blocking_ast);
-EXPORT_SYMBOL(ldlm_server_completion_ast);
-EXPORT_SYMBOL(ldlm_server_glimpse_ast);
-EXPORT_SYMBOL(ldlm_glimpse_locks);
-EXPORT_SYMBOL(ldlm_handle_enqueue);
-EXPORT_SYMBOL(ldlm_handle_enqueue0);
-EXPORT_SYMBOL(ldlm_handle_cancel);
-EXPORT_SYMBOL(ldlm_request_cancel);
-EXPORT_SYMBOL(ldlm_handle_convert);
-EXPORT_SYMBOL(ldlm_handle_convert0);
-EXPORT_SYMBOL(ldlm_revoke_export_locks);
-#endif
-EXPORT_SYMBOL(ldlm_del_waiting_lock);
-EXPORT_SYMBOL(ldlm_get_ref);
-EXPORT_SYMBOL(ldlm_put_ref);
-EXPORT_SYMBOL(ldlm_refresh_waiting_lock);
-
-/* ldlm_resource.c */
-EXPORT_SYMBOL(ldlm_namespace_new);
-EXPORT_SYMBOL(ldlm_namespace_cleanup);
-EXPORT_SYMBOL(ldlm_namespace_free);
-EXPORT_SYMBOL(ldlm_namespace_dump);
-EXPORT_SYMBOL(ldlm_dump_all_namespaces);
-EXPORT_SYMBOL(ldlm_resource_get);
-EXPORT_SYMBOL(ldlm_resource_putref);
-EXPORT_SYMBOL(ldlm_resource_unlink_lock);
-
-/* ldlm_lib.c */
-EXPORT_SYMBOL(client_import_add_conn);
-EXPORT_SYMBOL(client_import_del_conn);
-EXPORT_SYMBOL(client_obd_setup);
-EXPORT_SYMBOL(client_obd_cleanup);
-EXPORT_SYMBOL(client_connect_import);
-EXPORT_SYMBOL(client_disconnect_export);
-EXPORT_SYMBOL(target_send_reply);
-EXPORT_SYMBOL(target_pack_pool_reply);
-
-#ifdef HAVE_SERVER_SUPPORT
-EXPORT_SYMBOL(server_disconnect_export);
-EXPORT_SYMBOL(target_stop_recovery_thread);
-EXPORT_SYMBOL(target_handle_connect);
-EXPORT_SYMBOL(target_cleanup_recovery);
-EXPORT_SYMBOL(target_destroy_export);
-EXPORT_SYMBOL(target_cancel_recovery_timer);
-EXPORT_SYMBOL(target_queue_recovery_request);
-EXPORT_SYMBOL(target_handle_ping);
-EXPORT_SYMBOL(target_handle_disconnect);
-#endif
-
-/* l_lock.c */
-EXPORT_SYMBOL(lock_res_and_lock);
-EXPORT_SYMBOL(unlock_res_and_lock);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff