*
* 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) 2010, 2015, Intel Corporation.
+ * Copyright (c) 2010, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#include "ldlm_internal.h"
+struct kmem_cache *ldlm_glimpse_work_kmem;
+EXPORT_SYMBOL(ldlm_glimpse_work_kmem);
+
/* lock types */
char *ldlm_lockname[] = {
[0] = "--",
return "getattr";
case IT_LOOKUP:
return "lookup";
- case IT_UNLINK:
- return "unlink";
case IT_GETXATTR:
return "getxattr";
case IT_LAYOUT:
}
EXPORT_SYMBOL(ldlm_it2str);
-extern struct kmem_cache *ldlm_lock_slab;
-
#ifdef HAVE_SERVER_SUPPORT
static ldlm_processing_policy ldlm_processing_policy_table[] = {
[LDLM_PLAIN] = ldlm_process_plain_lock,
struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
+ if (ns->ns_last_pos == &lock->l_lru)
+ ns->ns_last_pos = lock->l_lru.prev;
list_del_init(&lock->l_lru);
LASSERT(ns->ns_nr_unused > 0);
ns->ns_nr_unused--;
* otherwise, the lock hasn't been in the LRU list.
* \retval 1 the lock was in LRU list and removed.
*/
-int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, cfs_time_t last_use)
+int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, ktime_t last_use)
{
struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
int rc = 0;
}
spin_lock(&ns->ns_lock);
- if (last_use == 0 || last_use == lock->l_last_used)
+ if (!ktime_compare(last_use, ktime_set(0, 0)) ||
+ !ktime_compare(last_use, lock->l_last_used))
rc = ldlm_lock_remove_from_lru_nolock(lock);
spin_unlock(&ns->ns_lock);
{
struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
- lock->l_last_used = cfs_time_current();
+ lock->l_last_used = ktime_get();
LASSERT(list_empty(&lock->l_lru));
LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
list_add_tail(&lock->l_lru, &ns->ns_unused_list);
- ldlm_clear_skipped(lock);
LASSERT(ns->ns_nr_unused >= 0);
ns->ns_nr_unused++;
}
ldlm_lock_remove_from_lru(lock);
class_handle_unhash(&lock->l_handle);
-#if 0
- /* Wake anyone waiting for this lock */
- /* FIXME: I should probably add yet another flag, instead of using
- * l_export to only call this on clients */
- if (lock->l_export)
- class_export_put(lock->l_export);
- lock->l_export = NULL;
- if (lock->l_export && lock->l_completion_ast)
- lock->l_completion_ast(lock, 0);
-#endif
EXIT;
return 1;
}
lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
LDLM_NSS_LOCKS);
- INIT_LIST_HEAD(&lock->l_handle.h_link);
+ INIT_LIST_HEAD_RCU(&lock->l_handle.h_link);
class_handle_hash(&lock->l_handle, &lock_handle_ops);
lu_ref_init(&lock->l_reference);
lu_ref_add(&lock->l_reference, "hash", lock);
lock->l_callback_timeout = 0;
+ lock->l_activity = 0;
#if LUSTRE_TRACKS_LOCK_EXP_REFS
INIT_LIST_HEAD(&lock->l_exp_refs_link);
if (lock == NULL)
RETURN(NULL);
+ if (lock->l_export != NULL && lock->l_export->exp_failed) {
+ CDEBUG(D_INFO, "lock export failed: lock %p, exp %p\n",
+ lock, lock->l_export);
+ LDLM_LOCK_PUT(lock);
+ RETURN(NULL);
+ }
+
/* It's unlikely but possible that someone marked the lock as
* destroyed after we did handle2object on it */
if ((flags == 0) && !ldlm_is_destroyed(lock)) {
* discard dirty data, rather than writing back. */
if (ldlm_is_ast_discard_data(new))
ldlm_set_discard_data(lock);
- LASSERT(list_empty(&lock->l_bl_ast));
- list_add(&lock->l_bl_ast, work_list);
- LDLM_LOCK_GET(lock);
- LASSERT(lock->l_blocking_lock == NULL);
- lock->l_blocking_lock = LDLM_LOCK_GET(new);
- }
+
+ /* Lock can be converted from a blocking state back to granted
+ * after lock convert or COS downgrade but still be in an
+ * older bl_list because it is controlled only by
+ * ldlm_work_bl_ast_lock(), let it be processed there.
+ */
+ if (list_empty(&lock->l_bl_ast)) {
+ list_add(&lock->l_bl_ast, work_list);
+ LDLM_LOCK_GET(lock);
+ }
+ LASSERT(lock->l_blocking_lock == NULL);
+ lock->l_blocking_lock = LDLM_LOCK_GET(new);
+ }
}
/**
struct ldlm_lock *lock;
lock = ldlm_handle2lock(lockh);
- LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
+ LASSERTF(lock != NULL, "Non-existing lock: %#llx\n", lockh->cookie);
ldlm_lock_addref_internal(lock, mode);
LDLM_LOCK_PUT(lock);
}
} else if (ns_is_client(ns) &&
!lock->l_readers && !lock->l_writers &&
!ldlm_is_no_lru(lock) &&
- !ldlm_is_bl_ast(lock)) {
+ !ldlm_is_bl_ast(lock) &&
+ !ldlm_is_converting(lock)) {
LDLM_DEBUG(lock, "add lock into lru list");
void ldlm_lock_decref(const struct lustre_handle *lockh, enum ldlm_mode mode)
{
struct ldlm_lock *lock = __ldlm_handle2lock(lockh, 0);
- LASSERTF(lock != NULL, "Non-existing lock: "LPX64"\n", lockh->cookie);
+ LASSERTF(lock != NULL, "Non-existing lock: %#llx\n", lockh->cookie);
ldlm_lock_decref_internal(lock, mode);
LDLM_LOCK_PUT(lock);
}
* Add a lock to granted list on a resource maintaining skiplist
* correctness.
*/
-static void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
+void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock)
{
- struct sl_insert_point prev;
- ENTRY;
+ struct sl_insert_point prev;
- LASSERT(lock->l_req_mode == lock->l_granted_mode);
+ LASSERT(ldlm_is_granted(lock));
- search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
- ldlm_granted_list_add_lock(lock, &prev);
- EXIT;
+ search_granted_lock(&lock->l_resource->lr_granted, lock, &prev);
+ ldlm_granted_list_add_lock(lock, &prev);
}
/**
* NOTE: called by
* - ldlm_lock_enqueue
* - ldlm_reprocess_queue
- * - ldlm_lock_convert
*
* must be called with lr_lock held
*/
enum ldlm_mode *lmd_mode;
union ldlm_policy_data *lmd_policy;
__u64 lmd_flags;
+ __u64 lmd_skip_flags;
int lmd_unref;
};
if (!equi(data->lmd_flags & LDLM_FL_LOCAL_ONLY, ldlm_is_local(lock)))
return INTERVAL_ITER_CONT;
+ /* Filter locks by skipping flags */
+ if (data->lmd_skip_flags & lock->l_flags)
+ return INTERVAL_ITER_CONT;
+
if (data->lmd_flags & LDLM_FL_TEST_LOCK) {
LDLM_LOCK_GET(lock);
ldlm_lock_touch_in_lru(lock);
};
int idx;
+ data->lmd_lock = NULL;
+
for (idx = 0; idx < LCK_MODE_NUM; idx++) {
struct ldlm_interval_tree *tree = &res->lr_itree[idx];
interval_search(tree->lit_root, &ext,
itree_overlap_cb, data);
+ if (data->lmd_lock)
+ return data->lmd_lock;
}
- return data->lmd_lock;
+
+ return NULL;
}
struct ldlm_lock *lock;
int rc;
+ data->lmd_lock = NULL;
+
list_for_each_entry(lock, queue, l_res_link) {
rc = lock_matches(lock, data);
if (rc == INTERVAL_ITER_STOP)
return data->lmd_lock;
}
+
return NULL;
}
* keep caller code unchanged), the context failure will be discovered by
* caller sometime later.
*/
-enum ldlm_mode ldlm_lock_match(struct ldlm_namespace *ns, __u64 flags,
- const struct ldlm_res_id *res_id,
- enum ldlm_type type,
- union ldlm_policy_data *policy,
- enum ldlm_mode mode,
- struct lustre_handle *lockh, int unref)
+enum ldlm_mode ldlm_lock_match_with_skip(struct ldlm_namespace *ns,
+ __u64 flags, __u64 skip_flags,
+ const struct ldlm_res_id *res_id,
+ enum ldlm_type type,
+ union ldlm_policy_data *policy,
+ enum ldlm_mode mode,
+ struct lustre_handle *lockh, int unref)
{
struct lock_match_data data = {
- .lmd_old = NULL,
- .lmd_lock = NULL,
- .lmd_mode = &mode,
- .lmd_policy = policy,
- .lmd_flags = flags,
- .lmd_unref = unref,
+ .lmd_old = NULL,
+ .lmd_lock = NULL,
+ .lmd_mode = &mode,
+ .lmd_policy = policy,
+ .lmd_flags = flags,
+ .lmd_skip_flags = skip_flags,
+ .lmd_unref = unref,
};
struct ldlm_resource *res;
struct ldlm_lock *lock;
- int rc = 0;
+ int matched;
+
ENTRY;
if (ns == NULL) {
LDLM_RESOURCE_ADDREF(res);
lock_res(res);
-
if (res->lr_type == LDLM_EXTENT)
lock = search_itree(res, &data);
else
lock = search_queue(&res->lr_granted, &data);
- if (lock != NULL)
- GOTO(out, rc = 1);
- if (flags & LDLM_FL_BLOCK_GRANTED)
- GOTO(out, rc = 0);
- lock = search_queue(&res->lr_converting, &data);
- if (lock != NULL)
- GOTO(out, rc = 1);
- lock = search_queue(&res->lr_waiting, &data);
- if (lock != NULL)
- GOTO(out, rc = 1);
-
- EXIT;
- out:
- unlock_res(res);
- LDLM_RESOURCE_DELREF(res);
- ldlm_resource_putref(res);
+ if (!lock && !(flags & LDLM_FL_BLOCK_GRANTED))
+ lock = search_queue(&res->lr_waiting, &data);
+ matched = lock ? mode : 0;
+ unlock_res(res);
+ LDLM_RESOURCE_DELREF(res);
+ ldlm_resource_putref(res);
- if (lock) {
- ldlm_lock2handle(lock, lockh);
- if ((flags & LDLM_FL_LVB_READY) &&
+ if (lock) {
+ ldlm_lock2handle(lock, lockh);
+ if ((flags & LDLM_FL_LVB_READY) &&
(!ldlm_is_lvb_ready(lock))) {
__u64 wait_flags = LDLM_FL_LVB_READY |
LDLM_FL_DESTROYED | LDLM_FL_FAIL_NOTIFIED;
- struct l_wait_info lwi;
- if (lock->l_completion_ast) {
- int err = lock->l_completion_ast(lock,
- LDLM_FL_WAIT_NOREPROC,
- NULL);
- if (err) {
- if (flags & LDLM_FL_TEST_LOCK)
- LDLM_LOCK_RELEASE(lock);
- else
- ldlm_lock_decref_internal(lock,
- mode);
- rc = 0;
- goto out2;
- }
- }
+ struct l_wait_info lwi;
+
+ if (lock->l_completion_ast) {
+ int err = lock->l_completion_ast(lock,
+ LDLM_FL_WAIT_NOREPROC,
+ NULL);
+ if (err)
+ GOTO(out_fail_match, matched = 0);
+ }
- lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
- NULL, LWI_ON_SIGNAL_NOOP, NULL);
+ lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(obd_timeout),
+ NULL, LWI_ON_SIGNAL_NOOP, NULL);
/* XXX FIXME see comment on CAN_MATCH in lustre_dlm.h */
- l_wait_event(lock->l_waitq,
- lock->l_flags & wait_flags,
+ l_wait_event(lock->l_waitq, lock->l_flags & wait_flags,
&lwi);
- if (!ldlm_is_lvb_ready(lock)) {
- if (flags & LDLM_FL_TEST_LOCK)
- LDLM_LOCK_RELEASE(lock);
- else
- ldlm_lock_decref_internal(lock, mode);
- rc = 0;
- }
- }
- }
- out2:
- if (rc) {
- LDLM_DEBUG(lock, "matched ("LPU64" "LPU64")",
- (type == LDLM_PLAIN || type == LDLM_IBITS) ?
- res_id->name[2] : policy->l_extent.start,
- (type == LDLM_PLAIN || type == LDLM_IBITS) ?
- res_id->name[3] : policy->l_extent.end);
-
- /* check user's security context */
- if (lock->l_conn_export &&
- sptlrpc_import_check_ctx(
- class_exp2cliimp(lock->l_conn_export))) {
- if (!(flags & LDLM_FL_TEST_LOCK))
- ldlm_lock_decref_internal(lock, mode);
- rc = 0;
- }
+ if (!ldlm_is_lvb_ready(lock))
+ GOTO(out_fail_match, matched = 0);
+ }
- if (flags & LDLM_FL_TEST_LOCK)
- LDLM_LOCK_RELEASE(lock);
-
- } else if (!(flags & LDLM_FL_TEST_LOCK)) {/*less verbose for test-only*/
- LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
- LPU64"/"LPU64" ("LPU64" "LPU64")", ns,
- type, mode, res_id->name[0], res_id->name[1],
- (type == LDLM_PLAIN || type == LDLM_IBITS) ?
- res_id->name[2] :policy->l_extent.start,
- (type == LDLM_PLAIN || type == LDLM_IBITS) ?
- res_id->name[3] : policy->l_extent.end);
- }
+ /* check user's security context */
+ if (lock->l_conn_export &&
+ sptlrpc_import_check_ctx(
+ class_exp2cliimp(lock->l_conn_export)))
+ GOTO(out_fail_match, matched = 0);
+
+ LDLM_DEBUG(lock, "matched (%llu %llu)",
+ (type == LDLM_PLAIN || type == LDLM_IBITS) ?
+ res_id->name[2] : policy->l_extent.start,
+ (type == LDLM_PLAIN || type == LDLM_IBITS) ?
+ res_id->name[3] : policy->l_extent.end);
+
+out_fail_match:
+ if (flags & LDLM_FL_TEST_LOCK)
+ LDLM_LOCK_RELEASE(lock);
+ else if (!matched)
+ ldlm_lock_decref_internal(lock, mode);
+ }
+
+ /* less verbose for test-only */
+ if (!matched && !(flags & LDLM_FL_TEST_LOCK)) {
+ LDLM_DEBUG_NOLOCK("not matched ns %p type %u mode %u res "
+ "%llu/%llu (%llu %llu)", ns,
+ type, mode, res_id->name[0], res_id->name[1],
+ (type == LDLM_PLAIN || type == LDLM_IBITS) ?
+ res_id->name[2] : policy->l_extent.start,
+ (type == LDLM_PLAIN || type == LDLM_IBITS) ?
+ res_id->name[3] : policy->l_extent.end);
+ }
if (data.lmd_old != NULL)
LDLM_LOCK_PUT(data.lmd_old);
- return rc ? mode : 0;
+ return matched;
}
-EXPORT_SYMBOL(ldlm_lock_match);
+EXPORT_SYMBOL(ldlm_lock_match_with_skip);
enum ldlm_mode ldlm_revalidate_lock_handle(const struct lustre_handle *lockh,
__u64 *bits)
RETURN(ERR_PTR(rc));
}
+#ifdef HAVE_SERVER_SUPPORT
+static enum ldlm_error ldlm_lock_enqueue_helper(struct ldlm_lock *lock,
+ __u64 *flags)
+{
+ struct ldlm_resource *res = lock->l_resource;
+ enum ldlm_error rc = ELDLM_OK;
+ struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
+ ldlm_processing_policy policy;
+ ENTRY;
+
+ policy = ldlm_processing_policy_table[res->lr_type];
+restart:
+ policy(lock, flags, LDLM_PROCESS_ENQUEUE, &rc, &rpc_list);
+ if (rc == ELDLM_OK && lock->l_granted_mode != lock->l_req_mode &&
+ res->lr_type != LDLM_FLOCK) {
+ rc = ldlm_handle_conflict_lock(lock, flags, &rpc_list);
+ if (rc == -ERESTART)
+ GOTO(restart, rc);
+ }
+
+ if (!list_empty(&rpc_list))
+ ldlm_discard_bl_list(&rpc_list);
+
+ RETURN(rc);
+}
+#endif
+
/**
* Enqueue (request) a lock.
*
* set, skip all the enqueueing and delegate lock processing to intent policy
* function.
*/
-enum ldlm_error ldlm_lock_enqueue(struct ldlm_namespace *ns,
+enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
+ struct ldlm_namespace *ns,
struct ldlm_lock **lockp,
void *cookie, __u64 *flags)
{
struct ldlm_lock *lock = *lockp;
struct ldlm_resource *res = lock->l_resource;
int local = ns_is_client(ldlm_res_to_ns(res));
-#ifdef HAVE_SERVER_SUPPORT
- ldlm_processing_policy policy;
-#endif
enum ldlm_error rc = ELDLM_OK;
struct ldlm_interval *node = NULL;
ENTRY;
/* policies are not executed on the client or during replay */
if ((*flags & (LDLM_FL_HAS_INTENT|LDLM_FL_REPLAY)) == LDLM_FL_HAS_INTENT
&& !local && ns->ns_policy) {
- rc = ns->ns_policy(ns, lockp, cookie, lock->l_req_mode, *flags,
- NULL);
+ rc = ns->ns_policy(env, ns, lockp, cookie, lock->l_req_mode,
+ *flags, NULL);
if (rc == ELDLM_LOCK_REPLACED) {
/* The lock that was returned has already been granted,
* and placed into lockp. If it's not the same as the
*flags |= LDLM_FL_LOCK_CHANGED;
RETURN(0);
} else if (rc != ELDLM_OK &&
- lock->l_req_mode == lock->l_granted_mode) {
+ ldlm_is_granted(lock)) {
LASSERT(*flags & LDLM_FL_RESENT);
/* It may happen that ns_policy returns an error in
* resend case, object may be unlinked or just some
* Take NO_TIMEOUT from the lock as it is inherited through
* LDLM_FL_INHERIT_MASK */
*flags |= LDLM_FL_LOCK_CHANGED;
- if (lock->l_req_mode != lock->l_granted_mode)
+ if (!ldlm_is_granted(lock))
*flags |= LDLM_FL_BLOCK_GRANTED;
*flags |= lock->l_flags & LDLM_FL_NO_TIMEOUT;
RETURN(ELDLM_OK);
if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, GFP_NOFS);
- lock_res_and_lock(lock);
- if (local && lock->l_req_mode == lock->l_granted_mode) {
+ lock_res_and_lock(lock);
+ if (local && ldlm_is_granted(lock)) {
/* The server returned a blocked lock, but it was granted
* before we got a chance to actually enqueue it. We don't
* need to do anything else. */
* more or less trusting the clients not to lie.
*
* FIXME (bug 268): Detect obvious lies by checking compatibility in
- * granted/converting queues. */
+ * granted queue. */
if (local) {
- if (*flags & LDLM_FL_BLOCK_CONV)
- ldlm_resource_add_lock(res, &res->lr_converting, lock);
- else if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
- ldlm_resource_add_lock(res, &res->lr_waiting, lock);
- else
- ldlm_grant_lock(lock, NULL);
+ if (*flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED))
+ ldlm_resource_add_lock(res, &res->lr_waiting, lock);
+ else
+ ldlm_grant_lock(lock, NULL);
GOTO(out, rc = ELDLM_OK);
#ifdef HAVE_SERVER_SUPPORT
- } else if (*flags & LDLM_FL_REPLAY) {
- if (*flags & LDLM_FL_BLOCK_CONV) {
- ldlm_resource_add_lock(res, &res->lr_converting, lock);
- GOTO(out, rc = ELDLM_OK);
- } else if (*flags & LDLM_FL_BLOCK_WAIT) {
- ldlm_resource_add_lock(res, &res->lr_waiting, lock);
+ } else if (*flags & LDLM_FL_REPLAY) {
+ if (*flags & LDLM_FL_BLOCK_WAIT) {
+ ldlm_resource_add_lock(res, &res->lr_waiting, lock);
GOTO(out, rc = ELDLM_OK);
- } else if (*flags & LDLM_FL_BLOCK_GRANTED) {
- ldlm_grant_lock(lock, NULL);
+ } else if (*flags & LDLM_FL_BLOCK_GRANTED) {
+ ldlm_grant_lock(lock, NULL);
GOTO(out, rc = ELDLM_OK);
- }
- /* If no flags, fall through to normal enqueue path. */
- }
+ }
+ /* If no flags, fall through to normal enqueue path. */
+ }
- policy = ldlm_processing_policy_table[res->lr_type];
- policy(lock, flags, 1, &rc, NULL);
- GOTO(out, rc);
+ rc = ldlm_lock_enqueue_helper(lock, flags);
+ GOTO(out, rc);
#else
} else {
CERROR("This is client-side-only module, cannot handle "
* Must be called with resource lock held.
*/
int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
- struct list_head *work_list)
+ struct list_head *work_list,
+ enum ldlm_process_intention intention)
{
struct list_head *tmp, *pos;
ldlm_processing_policy policy;
__u64 flags;
int rc = LDLM_ITER_CONTINUE;
enum ldlm_error err;
+ struct list_head bl_ast_list = LIST_HEAD_INIT(bl_ast_list);
ENTRY;
check_res_locked(res);
policy = ldlm_processing_policy_table[res->lr_type];
LASSERT(policy);
+ LASSERT(intention == LDLM_PROCESS_RESCAN ||
+ intention == LDLM_PROCESS_RECOVERY);
+restart:
list_for_each_safe(tmp, pos, queue) {
struct ldlm_lock *pending;
+ struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
pending = list_entry(tmp, struct ldlm_lock, l_res_link);
CDEBUG(D_INFO, "Reprocessing lock %p\n", pending);
flags = 0;
- rc = policy(pending, &flags, 0, &err, work_list);
- if (rc != LDLM_ITER_CONTINUE)
- break;
+ rc = policy(pending, &flags, intention, &err, &rpc_list);
+ if (pending->l_granted_mode == pending->l_req_mode ||
+ res->lr_type == LDLM_FLOCK) {
+ list_splice(&rpc_list, work_list);
+ } else {
+ list_splice(&rpc_list, &bl_ast_list);
+ }
+ /*
+ * When this is called from recovery done, we always want
+ * to scan the whole list no matter what 'rc' is returned.
+ */
+ if (rc != LDLM_ITER_CONTINUE &&
+ intention == LDLM_PROCESS_RESCAN)
+ break;
}
- RETURN(rc);
+ if (!list_empty(&bl_ast_list)) {
+ unlock_res(res);
+
+ rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &bl_ast_list,
+ LDLM_WORK_BL_AST);
+
+ lock_res(res);
+ if (rc == -ERESTART)
+ GOTO(restart, rc);
+ }
+
+ if (!list_empty(&bl_ast_list))
+ ldlm_discard_bl_list(&bl_ast_list);
+
+ RETURN(intention == LDLM_PROCESS_RESCAN ? rc : LDLM_ITER_CONTINUE);
}
-#endif
/**
- * Process a call to blocking AST callback for a lock in ast_work list
+ * Conflicting locks are detected for a lock to be enqueued, add the lock
+ * into waiting list and send blocking ASTs to the conflicting locks.
+ *
+ * \param[in] lock The lock to be enqueued.
+ * \param[out] flags Lock flags for the lock to be enqueued.
+ * \param[in] rpc_list Conflicting locks list.
+ *
+ * \retval -ERESTART: Some lock was instantly canceled while sending
+ * blocking ASTs, caller needs to re-check conflicting
+ * locks.
+ * \retval -EAGAIN: Lock was destroyed, caller should return error.
+ * \reval 0: Lock is successfully added in waiting list.
*/
-static int
-ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
+int ldlm_handle_conflict_lock(struct ldlm_lock *lock, __u64 *flags,
+ struct list_head *rpc_list)
{
- struct ldlm_cb_set_arg *arg = opaq;
- struct ldlm_lock_desc d;
- int rc;
- struct ldlm_lock *lock;
+ struct ldlm_resource *res = lock->l_resource;
+ int rc;
ENTRY;
- if (list_empty(arg->list))
- RETURN(-ENOENT);
+ check_res_locked(res);
- lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
+ /* If either of the compat_queue()s returned failure, then we
+ * have ASTs to send and must go onto the waiting list.
+ *
+ * bug 2322: we used to unlink and re-add here, which was a
+ * terrible folly -- if we goto restart, we could get
+ * re-ordered! Causes deadlock, because ASTs aren't sent! */
+ if (list_empty(&lock->l_res_link))
+ ldlm_resource_add_lock(res, &res->lr_waiting, lock);
+ unlock_res(res);
- /* nobody should touch l_bl_ast */
- lock_res_and_lock(lock);
- list_del_init(&lock->l_bl_ast);
+ rc = ldlm_run_ast_work(ldlm_res_to_ns(res), rpc_list,
+ LDLM_WORK_BL_AST);
- LASSERT(ldlm_is_ast_sent(lock));
- LASSERT(lock->l_bl_ast_run == 0);
- LASSERT(lock->l_blocking_lock);
- lock->l_bl_ast_run++;
- unlock_res_and_lock(lock);
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_OST_FAIL_RACE) &&
+ !ns_is_client(ldlm_res_to_ns(res)))
+ class_fail_export(lock->l_export);
- ldlm_lock2desc(lock->l_blocking_lock, &d);
+ lock_res(res);
+ if (rc == -ERESTART) {
+ /* 15715: The lock was granted and destroyed after
+ * resource lock was dropped. Interval node was freed
+ * in ldlm_lock_destroy. Anyway, this always happens
+ * when a client is being evicted. So it would be
+ * ok to return an error. -jay */
+ if (ldlm_is_destroyed(lock))
+ RETURN(-EAGAIN);
+
+ /* lock was granted while resource was unlocked. */
+ if (ldlm_is_granted(lock)) {
+ /* bug 11300: if the lock has been granted,
+ * break earlier because otherwise, we will go
+ * to restart and ldlm_resource_unlink will be
+ * called and it causes the interval node to be
+ * freed. Then we will fail at
+ * ldlm_extent_add_lock() */
+ *flags &= ~LDLM_FL_BLOCKED_MASK;
+ RETURN(0);
+ }
- rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
- LDLM_LOCK_RELEASE(lock->l_blocking_lock);
- lock->l_blocking_lock = NULL;
- LDLM_LOCK_RELEASE(lock);
+ RETURN(rc);
+ }
+ *flags |= LDLM_FL_BLOCK_GRANTED;
- RETURN(rc);
+ RETURN(0);
}
/**
- * Process a call to completion AST callback for a lock in ast_work list
+ * Discard all AST work items from list.
+ *
+ * If for whatever reason we do not want to send ASTs to conflicting locks
+ * anymore, disassemble the list with this function.
+ */
+void ldlm_discard_bl_list(struct list_head *bl_list)
+{
+ struct ldlm_lock *lock, *tmp;
+
+ ENTRY;
+
+ list_for_each_entry_safe(lock, tmp, bl_list, l_bl_ast) {
+ LASSERT(!list_empty(&lock->l_bl_ast));
+ list_del_init(&lock->l_bl_ast);
+ ldlm_clear_ast_sent(lock);
+ LASSERT(lock->l_bl_ast_run == 0);
+ ldlm_clear_blocking_lock(lock);
+ LDLM_LOCK_RELEASE(lock);
+ }
+ EXIT;
+}
+
+/**
+ * Process a call to blocking AST callback for a lock in ast_work list
*/
static int
-ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
+ldlm_work_bl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
{
- struct ldlm_cb_set_arg *arg = opaq;
- int rc = 0;
- struct ldlm_lock *lock;
- ldlm_completion_callback completion_callback;
+ struct ldlm_cb_set_arg *arg = opaq;
+ struct ldlm_lock *lock;
+ struct ldlm_lock_desc d;
+ struct ldlm_bl_desc bld;
+ int rc;
+
ENTRY;
if (list_empty(arg->list))
RETURN(-ENOENT);
- lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
-
- /* It's possible to receive a completion AST before we've set
- * the l_completion_ast pointer: either because the AST arrived
- * before the reply, or simply because there's a small race
- * window between receiving the reply and finishing the local
- * enqueue. (bug 842)
- *
- * This can't happen with the blocking_ast, however, because we
- * will never call the local blocking_ast until we drop our
- * reader/writer reference, which we won't do until we get the
- * reply and finish enqueueing. */
+ lock = list_entry(arg->list->next, struct ldlm_lock, l_bl_ast);
- /* nobody should touch l_cp_ast */
+ /* nobody should touch l_bl_ast but some locks in the list may become
+ * granted after lock convert or COS downgrade, these locks should be
+ * just skipped here and removed from the list.
+ */
lock_res_and_lock(lock);
- list_del_init(&lock->l_cp_ast);
- LASSERT(ldlm_is_cp_reqd(lock));
- /* save l_completion_ast since it can be changed by
- * mds_intent_policy(), see bug 14225 */
- completion_callback = lock->l_completion_ast;
- ldlm_clear_cp_reqd(lock);
+ list_del_init(&lock->l_bl_ast);
+
+ /* lock is not blocking lock anymore, but was kept in the list because
+ * it can managed only here.
+ */
+ if (!ldlm_is_ast_sent(lock)) {
+ unlock_res_and_lock(lock);
+ LDLM_LOCK_RELEASE(lock);
+ RETURN(0);
+ }
+
+ LASSERT(lock->l_blocking_lock);
+ ldlm_lock2desc(lock->l_blocking_lock, &d);
+ /* copy blocking lock ibits in cancel_bits as well,
+ * new client may use them for lock convert and it is
+ * important to use new field to convert locks from
+ * new servers only
+ */
+ d.l_policy_data.l_inodebits.cancel_bits =
+ lock->l_blocking_lock->l_policy_data.l_inodebits.bits;
+
+ /* Blocking lock is being destroyed here but some information about it
+ * may be needed inside l_blocking_ast() function below,
+ * e.g. in mdt_blocking_ast(). So save needed data in bl_desc.
+ */
+ bld.bl_same_client = lock->l_client_cookie ==
+ lock->l_blocking_lock->l_client_cookie;
+ bld.bl_cos_incompat = ldlm_is_cos_incompat(lock->l_blocking_lock);
+ arg->bl_desc = &bld;
+
+ LASSERT(ldlm_is_ast_sent(lock));
+ LASSERT(lock->l_bl_ast_run == 0);
+ lock->l_bl_ast_run++;
+ ldlm_clear_blocking_lock(lock);
unlock_res_and_lock(lock);
- if (completion_callback != NULL)
- rc = completion_callback(lock, 0, (void *)arg);
+ rc = lock->l_blocking_ast(lock, &d, (void *)arg, LDLM_CB_BLOCKING);
+
LDLM_LOCK_RELEASE(lock);
RETURN(rc);
/* transfer the glimpse descriptor to ldlm_cb_set_arg */
arg->gl_desc = gl_work->gl_desc;
+ arg->gl_interpret_reply = gl_work->gl_interpret_reply;
+ arg->gl_interpret_data = gl_work->gl_interpret_data;
/* invoke the actual glimpse callback */
if (lock->l_glimpse_ast(lock, (void*)arg) == 0)
rc = 1;
LDLM_LOCK_RELEASE(lock);
-
- if ((gl_work->gl_flags & LDLM_GL_WORK_NOFREE) == 0)
+ if (gl_work->gl_flags & LDLM_GL_WORK_SLAB_ALLOCATED)
+ OBD_SLAB_FREE_PTR(gl_work, ldlm_glimpse_work_kmem);
+ else
OBD_FREE_PTR(gl_work);
RETURN(rc);
}
+#endif
+
+/**
+ * Process a call to completion AST callback for a lock in ast_work list
+ */
+static int
+ldlm_work_cp_ast_lock(struct ptlrpc_request_set *rqset, void *opaq)
+{
+ struct ldlm_cb_set_arg *arg = opaq;
+ struct ldlm_lock *lock;
+ ldlm_completion_callback completion_callback;
+ int rc = 0;
+
+ ENTRY;
+
+ if (list_empty(arg->list))
+ RETURN(-ENOENT);
+
+ lock = list_entry(arg->list->next, struct ldlm_lock, l_cp_ast);
+
+ /* It's possible to receive a completion AST before we've set
+ * the l_completion_ast pointer: either because the AST arrived
+ * before the reply, or simply because there's a small race
+ * window between receiving the reply and finishing the local
+ * enqueue. (bug 842)
+ *
+ * This can't happen with the blocking_ast, however, because we
+ * will never call the local blocking_ast until we drop our
+ * reader/writer reference, which we won't do until we get the
+ * reply and finish enqueueing. */
+
+ /* nobody should touch l_cp_ast */
+ lock_res_and_lock(lock);
+ list_del_init(&lock->l_cp_ast);
+ LASSERT(ldlm_is_cp_reqd(lock));
+ /* save l_completion_ast since it can be changed by
+ * mds_intent_policy(), see bug 14225 */
+ completion_callback = lock->l_completion_ast;
+ ldlm_clear_cp_reqd(lock);
+ unlock_res_and_lock(lock);
+
+ if (completion_callback != NULL)
+ rc = completion_callback(lock, 0, (void *)arg);
+ LDLM_LOCK_RELEASE(lock);
+
+ RETURN(rc);
+}
/**
* Process list of locks in need of ASTs being sent.
* one.
*/
int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
- ldlm_desc_ast_t ast_type)
+ ldlm_desc_ast_t ast_type)
{
struct ldlm_cb_set_arg *arg;
- set_producer_func work_ast_lock;
- int rc;
+ set_producer_func work_ast_lock;
+ int rc;
if (list_empty(rpc_list))
RETURN(0);
arg->list = rpc_list;
switch (ast_type) {
- case LDLM_WORK_BL_AST:
- arg->type = LDLM_BL_CALLBACK;
- work_ast_lock = ldlm_work_bl_ast_lock;
- break;
- case LDLM_WORK_CP_AST:
- arg->type = LDLM_CP_CALLBACK;
- work_ast_lock = ldlm_work_cp_ast_lock;
- break;
- case LDLM_WORK_REVOKE_AST:
- arg->type = LDLM_BL_CALLBACK;
- work_ast_lock = ldlm_work_revoke_ast_lock;
- break;
- case LDLM_WORK_GL_AST:
- arg->type = LDLM_GL_CALLBACK;
- work_ast_lock = ldlm_work_gl_ast_lock;
- break;
- default:
- LBUG();
+ case LDLM_WORK_CP_AST:
+ arg->type = LDLM_CP_CALLBACK;
+ work_ast_lock = ldlm_work_cp_ast_lock;
+ break;
+#ifdef HAVE_SERVER_SUPPORT
+ case LDLM_WORK_BL_AST:
+ arg->type = LDLM_BL_CALLBACK;
+ work_ast_lock = ldlm_work_bl_ast_lock;
+ break;
+ case LDLM_WORK_REVOKE_AST:
+ arg->type = LDLM_BL_CALLBACK;
+ work_ast_lock = ldlm_work_revoke_ast_lock;
+ break;
+ case LDLM_WORK_GL_AST:
+ arg->type = LDLM_GL_CALLBACK;
+ work_ast_lock = ldlm_work_gl_ast_lock;
+ break;
+#endif
+ default:
+ LBUG();
}
/* We create a ptlrpc request set with flow control extension.
if (arg->set == NULL)
GOTO(out, rc = -ENOMEM);
- ptlrpc_set_wait(arg->set);
+ ptlrpc_set_wait(NULL, arg->set);
ptlrpc_set_destroy(arg->set);
rc = atomic_read(&arg->restart) ? -ERESTART : 0;
return rc;
}
-static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
-{
- ldlm_reprocess_all(res);
- return LDLM_ITER_CONTINUE;
-}
-
-static int ldlm_reprocess_res(struct cfs_hash *hs, struct cfs_hash_bd *bd,
- struct hlist_node *hnode, void *arg)
-{
- struct ldlm_resource *res = cfs_hash_object(hs, hnode);
- int rc;
-
- rc = reprocess_one_queue(res, arg);
-
- return rc == LDLM_ITER_STOP;
-}
-
-/**
- * Iterate through all resources on a namespace attempting to grant waiting
- * locks.
- */
-void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
-{
- ENTRY;
-
- if (ns != NULL) {
- cfs_hash_for_each_nolock(ns->ns_rs_hash,
- ldlm_reprocess_res, NULL, 0);
- }
- EXIT;
-}
-
/**
* Try to grant all waiting locks on a resource.
*
- * Calls ldlm_reprocess_queue on converting and waiting queues.
+ * Calls ldlm_reprocess_queue on waiting queue.
*
* Typically called after some resource locks are cancelled to see
* if anything could be granted as a result of the cancellation.
*/
-void ldlm_reprocess_all(struct ldlm_resource *res)
+static void __ldlm_reprocess_all(struct ldlm_resource *res,
+ enum ldlm_process_intention intention)
{
struct list_head rpc_list;
#ifdef HAVE_SERVER_SUPPORT
+ struct obd_device *obd;
int rc;
ENTRY;
return;
}
+ /* Disable reprocess during lock replay stage but allow during
+ * request replay stage.
+ */
+ obd = ldlm_res_to_ns(res)->ns_obd;
+ if (obd->obd_recovering &&
+ atomic_read(&obd->obd_req_replay_clients) == 0)
+ RETURN_EXIT;
restart:
- lock_res(res);
- rc = ldlm_reprocess_queue(res, &res->lr_converting, &rpc_list);
- if (rc == LDLM_ITER_CONTINUE)
- ldlm_reprocess_queue(res, &res->lr_waiting, &rpc_list);
- unlock_res(res);
-
- rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &rpc_list,
- LDLM_WORK_CP_AST);
- if (rc == -ERESTART) {
+ lock_res(res);
+ ldlm_reprocess_queue(res, &res->lr_waiting, &rpc_list, intention);
+ unlock_res(res);
+
+ rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &rpc_list,
+ LDLM_WORK_CP_AST);
+ if (rc == -ERESTART) {
LASSERT(list_empty(&rpc_list));
- goto restart;
- }
+ goto restart;
+ }
#else
ENTRY;
#endif
EXIT;
}
+
+void ldlm_reprocess_all(struct ldlm_resource *res)
+{
+ __ldlm_reprocess_all(res, LDLM_PROCESS_RESCAN);
+}
EXPORT_SYMBOL(ldlm_reprocess_all);
-static bool is_bl_done(struct ldlm_lock *lock)
+static int ldlm_reprocess_res(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode, void *arg)
{
- bool bl_done = true;
+ struct ldlm_resource *res = cfs_hash_object(hs, hnode);
- if (!ldlm_is_bl_done(lock)) {
- lock_res_and_lock(lock);
- bl_done = ldlm_is_bl_done(lock);
- unlock_res_and_lock(lock);
- }
+ /* This is only called once after recovery done. LU-8306. */
+ __ldlm_reprocess_all(res, LDLM_PROCESS_RECOVERY);
+ return 0;
+}
+
+/**
+ * Iterate through all resources on a namespace attempting to grant waiting
+ * locks.
+ */
+void ldlm_reprocess_recovery_done(struct ldlm_namespace *ns)
+{
+ ENTRY;
- return bl_done;
+ if (ns != NULL) {
+ cfs_hash_for_each_nolock(ns->ns_rs_hash,
+ ldlm_reprocess_res, NULL, 0);
+ }
+ EXIT;
}
/**
* talking to me first. -phik */
if (lock->l_readers || lock->l_writers) {
LDLM_ERROR(lock, "lock still has references");
+ unlock_res_and_lock(lock);
LBUG();
}
ldlm_resource_unlink_lock(lock);
ldlm_lock_destroy_nolock(lock);
- if (lock->l_granted_mode == lock->l_req_mode)
- ldlm_pool_del(&ns->ns_pool, lock);
+ if (ldlm_is_granted(lock))
+ ldlm_pool_del(&ns->ns_pool, lock);
/* Make sure we will not be called again for same lock what is possible
* if not to zero out lock->l_granted_mode */
EXPORT_SYMBOL(ldlm_lock_set_data);
struct export_cl_data {
+ const struct lu_env *ecl_env;
struct obd_export *ecl_exp;
int ecl_loop;
};
res = ldlm_resource_getref(lock->l_resource);
- ldlm_res_lvbo_update(res, NULL, 1);
+ ldlm_lvbo_update(res, lock, NULL, 1);
ldlm_lock_cancel(lock);
if (!exp->exp_obd->obd_stopping)
ldlm_reprocess_all(res);
*/
int ldlm_export_cancel_blocked_locks(struct obd_export *exp)
{
+ struct lu_env env;
struct export_cl_data ecl = {
.ecl_exp = exp,
.ecl_loop = 0,
};
+ int rc;
+
+ rc = lu_env_init(&env, LCT_DT_THREAD);
+ if (rc)
+ RETURN(rc);
+ ecl.ecl_env = &env;
while (!list_empty(&exp->exp_bl_list)) {
struct ldlm_lock *lock;
LDLM_LOCK_RELEASE(lock);
}
+ lu_env_fini(&env);
+
CDEBUG(D_DLMTRACE, "Export %p, canceled %d locks, "
"left on hash table %d.\n", exp, ecl.ecl_loop,
atomic_read(&exp->exp_lock_hash->hs_count));
*/
int ldlm_export_cancel_locks(struct obd_export *exp)
{
- struct export_cl_data ecl = {
- .ecl_exp = exp,
- .ecl_loop = 0,
- };
+ struct export_cl_data ecl;
+ struct lu_env env;
+ int rc;
+
+ rc = lu_env_init(&env, LCT_DT_THREAD);
+ if (rc)
+ RETURN(rc);
+ ecl.ecl_env = &env;
+ ecl.ecl_exp = exp;
+ ecl.ecl_loop = 0;
cfs_hash_for_each_empty(exp->exp_lock_hash,
ldlm_cancel_locks_for_export_cb, &ecl);
"left on hash table %d.\n", exp, ecl.ecl_loop,
atomic_read(&exp->exp_lock_hash->hs_count));
+ if (ecl.ecl_loop > 0 &&
+ atomic_read(&exp->exp_lock_hash->hs_count) == 0 &&
+ exp->exp_obd->obd_stopping)
+ ldlm_reprocess_recovery_done(exp->exp_obd->obd_namespace);
+
+ lu_env_fini(&env);
+
return ecl.ecl_loop;
}
/**
- * Downgrade an exclusive lock.
+ * Downgrade an PW/EX lock to COS mode.
*
- * A fast variant of ldlm_lock_convert for convertion of exclusive
- * locks. The convertion is always successful.
- * Used by Commit on Sharing (COS) code.
+ * A lock mode convertion from PW/EX mode to less conflict mode. The
+ * convertion may fail if lock was canceled before downgrade, but it doesn't
+ * indicate any problem, because such lock has no reader or writer, and will
+ * be released soon.
+ *
+ * Used by Commit on Sharing (COS) code to force object changes commit in case
+ * of conflict. Converted lock is considered as new lock and all blocking AST
+ * things are cleared, so any pending or new blocked lock on that lock will
+ * cause new call to blocking_ast and force resource object commit.
*
* \param lock A lock to convert
* \param new_mode new lock mode
*/
-void ldlm_lock_downgrade(struct ldlm_lock *lock, enum ldlm_mode new_mode)
+void ldlm_lock_mode_downgrade(struct ldlm_lock *lock, enum ldlm_mode new_mode)
{
- ENTRY;
-
- LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
- LASSERT(new_mode == LCK_COS);
-
- lock_res_and_lock(lock);
- ldlm_resource_unlink_lock(lock);
- /*
- * Remove the lock from pool as it will be added again in
- * ldlm_grant_lock() called below.
- */
- ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
-
- lock->l_req_mode = new_mode;
- ldlm_grant_lock(lock, NULL);
- unlock_res_and_lock(lock);
- ldlm_reprocess_all(lock->l_resource);
-
- EXIT;
-}
-EXPORT_SYMBOL(ldlm_lock_downgrade);
-
-/**
- * Attempt to convert already granted lock to a different mode.
- *
- * While lock conversion is not currently used, future client-side
- * optimizations could take advantage of it to avoid discarding cached
- * pages on a file.
- */
-struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock,
- enum ldlm_mode new_mode, __u32 *flags)
-{
- struct list_head rpc_list;
- struct ldlm_resource *res;
- struct ldlm_namespace *ns;
- int granted = 0;
#ifdef HAVE_SERVER_SUPPORT
- int old_mode;
- struct sl_insert_point prev;
-#endif
- struct ldlm_interval *node;
ENTRY;
- INIT_LIST_HEAD(&rpc_list);
- /* Just return if mode is unchanged. */
- if (new_mode == lock->l_granted_mode) {
- *flags |= LDLM_FL_BLOCK_GRANTED;
- RETURN(lock->l_resource);
- }
+ LASSERT(new_mode == LCK_COS);
- /* I can't check the type of lock here because the bitlock of lock
- * is not held here, so do the allocation blindly. -jay */
- OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, GFP_NOFS);
- if (node == NULL) /* Actually, this causes EDEADLOCK to be returned */
- RETURN(NULL);
+ lock_res_and_lock(lock);
- LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
- "new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
+ if (!(lock->l_granted_mode & (LCK_PW | LCK_EX))) {
+ unlock_res_and_lock(lock);
- lock_res_and_lock(lock);
+ LASSERT(lock->l_granted_mode == LCK_MINMODE);
+ LDLM_DEBUG(lock, "lock was canceled before downgrade");
+ RETURN_EXIT;
+ }
- res = lock->l_resource;
- ns = ldlm_res_to_ns(res);
+ ldlm_resource_unlink_lock(lock);
+ /*
+ * Remove the lock from pool as it will be added again in
+ * ldlm_grant_lock() called below.
+ */
+ ldlm_pool_del(&ldlm_lock_to_ns(lock)->ns_pool, lock);
-#ifdef HAVE_SERVER_SUPPORT
- old_mode = lock->l_req_mode;
-#endif
- lock->l_req_mode = new_mode;
- if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
-#ifdef HAVE_SERVER_SUPPORT
- /* remember the lock position where the lock might be
- * added back to the granted list later and also
- * remember the join mode for skiplist fixing. */
- prev.res_link = lock->l_res_link.prev;
- prev.mode_link = lock->l_sl_mode.prev;
- prev.policy_link = lock->l_sl_policy.prev;
-#endif
- ldlm_resource_unlink_lock(lock);
- } else {
- ldlm_resource_unlink_lock(lock);
- if (res->lr_type == LDLM_EXTENT) {
- /* FIXME: ugly code, I have to attach the lock to a
- * interval node again since perhaps it will be granted
- * soon */
- INIT_LIST_HEAD(&node->li_group);
- ldlm_interval_attach(node, lock);
- node = NULL;
- }
- }
+ /* Consider downgraded lock as a new lock and clear all states
+ * related to a previous blocking AST processing.
+ */
+ ldlm_clear_blocking_data(lock);
- /*
- * Remove old lock from the pool before adding the lock with new
- * mode below in ->policy()
- */
- ldlm_pool_del(&ns->ns_pool, lock);
+ lock->l_req_mode = new_mode;
+ ldlm_grant_lock(lock, NULL);
+ unlock_res_and_lock(lock);
- /* If this is a local resource, put it on the appropriate list. */
- if (ns_is_client(ldlm_res_to_ns(res))) {
- if (*flags & (LDLM_FL_BLOCK_CONV | LDLM_FL_BLOCK_GRANTED)) {
- ldlm_resource_add_lock(res, &res->lr_converting, lock);
- } else {
- /* This should never happen, because of the way the
- * server handles conversions. */
- LDLM_ERROR(lock, "Erroneous flags %x on local lock\n",
- *flags);
- LBUG();
+ ldlm_reprocess_all(lock->l_resource);
- ldlm_grant_lock(lock, &rpc_list);
- granted = 1;
- /* FIXME: completion handling not with lr_lock held ! */
- if (lock->l_completion_ast)
- lock->l_completion_ast(lock, 0, NULL);
- }
-#ifdef HAVE_SERVER_SUPPORT
- } else {
- int rc;
- enum ldlm_error err;
- __u64 pflags = 0;
- ldlm_processing_policy policy;
-
- policy = ldlm_processing_policy_table[res->lr_type];
- rc = policy(lock, &pflags, 0, &err, &rpc_list);
- if (rc == LDLM_ITER_STOP) {
- lock->l_req_mode = old_mode;
- if (res->lr_type == LDLM_EXTENT)
- ldlm_extent_add_lock(res, lock);
- else
- ldlm_granted_list_add_lock(lock, &prev);
-
- res = NULL;
- } else {
- *flags |= LDLM_FL_BLOCK_GRANTED;
- granted = 1;
- }
- }
-#else
- } else {
- CERROR("This is client-side-only module, cannot handle "
- "LDLM_NAMESPACE_SERVER resource type lock.\n");
- LBUG();
- }
+ EXIT;
#endif
- unlock_res_and_lock(lock);
-
- if (granted)
- ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
- if (node)
- OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
- RETURN(res);
}
+EXPORT_SYMBOL(ldlm_lock_mode_downgrade);
/**
* Print lock with lock handle \a lockh description into debug log.
{
va_list args;
struct obd_export *exp = lock->l_export;
- struct ldlm_resource *resource = lock->l_resource;
+ struct ldlm_resource *resource = NULL;
+ struct va_format vaf;
char *nid = "local";
+ /* on server-side resource of lock doesn't change */
+ if ((lock->l_flags & LDLM_FL_NS_SRV) != 0) {
+ if (lock->l_resource != NULL)
+ resource = ldlm_resource_getref(lock->l_resource);
+ } else if (spin_trylock(&lock->l_lock)) {
+ if (lock->l_resource != NULL)
+ resource = ldlm_resource_getref(lock->l_resource);
+ spin_unlock(&lock->l_lock);
+ }
+
va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
if (exp && exp->exp_connection) {
- nid = libcfs_nid2str(exp->exp_connection->c_peer.nid);
+ nid = obd_export_nid2str(exp);
} else if (exp && exp->exp_obd != NULL) {
struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
- nid = libcfs_nid2str(imp->imp_connection->c_peer.nid);
+ nid = obd_import_nid2str(imp);
}
if (resource == NULL) {
- libcfs_debug_vmsg2(msgdata, fmt, args,
- " ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" nid: %s "
- "remote: "LPX64" expref: %d pid: %u timeout: %lu "
- "lvb_type: %d\n",
- lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
- lock->l_readers, lock->l_writers,
- ldlm_lockname[lock->l_granted_mode],
- ldlm_lockname[lock->l_req_mode],
- lock->l_flags, nid, lock->l_remote_handle.cookie,
- exp ? atomic_read(&exp->exp_refcount) : -99,
- lock->l_pid, lock->l_callback_timeout, lock->l_lvb_type);
+ libcfs_debug_msg(msgdata,
+ "%pV ns: \?\? lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: \?\? rrc=\?\? type: \?\?\? flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lld lvb_type: %d\n",
+ &vaf,
+ lock,
+ lock->l_handle.h_cookie,
+ atomic_read(&lock->l_refc),
+ lock->l_readers, lock->l_writers,
+ ldlm_lockname[lock->l_granted_mode],
+ ldlm_lockname[lock->l_req_mode],
+ lock->l_flags, nid,
+ lock->l_remote_handle.cookie,
+ exp ? atomic_read(&exp->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout,
+ lock->l_lvb_type);
va_end(args);
return;
}
switch (resource->lr_type) {
case LDLM_EXTENT:
- libcfs_debug_vmsg2(msgdata, fmt, args,
- " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: "DLDLMRES" rrc: %d type: %s ["LPU64"->"LPU64"] "
- "(req "LPU64"->"LPU64") flags: "LPX64" nid: %s remote: "
- LPX64" expref: %d pid: %u timeout: %lu lvb_type: %d\n",
- ldlm_lock_to_ns_name(lock), lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
- lock->l_readers, lock->l_writers,
- ldlm_lockname[lock->l_granted_mode],
- ldlm_lockname[lock->l_req_mode],
- PLDLMRES(resource),
- atomic_read(&resource->lr_refcount),
- ldlm_typename[resource->lr_type],
- lock->l_policy_data.l_extent.start,
- lock->l_policy_data.l_extent.end,
- lock->l_req_extent.start, lock->l_req_extent.end,
- lock->l_flags, nid, lock->l_remote_handle.cookie,
- exp ? atomic_read(&exp->exp_refcount) : -99,
- lock->l_pid, lock->l_callback_timeout,
- lock->l_lvb_type);
+ libcfs_debug_msg(msgdata,
+ "%pV ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s [%llu->%llu] (req %llu->%llu) flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lld lvb_type: %d\n",
+ &vaf,
+ ldlm_lock_to_ns_name(lock), lock,
+ lock->l_handle.h_cookie,
+ atomic_read(&lock->l_refc),
+ lock->l_readers, lock->l_writers,
+ ldlm_lockname[lock->l_granted_mode],
+ ldlm_lockname[lock->l_req_mode],
+ PLDLMRES(resource),
+ atomic_read(&resource->lr_refcount),
+ ldlm_typename[resource->lr_type],
+ lock->l_policy_data.l_extent.start,
+ lock->l_policy_data.l_extent.end,
+ lock->l_req_extent.start, lock->l_req_extent.end,
+ lock->l_flags, nid,
+ lock->l_remote_handle.cookie,
+ exp ? atomic_read(&exp->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout,
+ lock->l_lvb_type);
break;
case LDLM_FLOCK:
- libcfs_debug_vmsg2(msgdata, fmt, args,
- " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: "DLDLMRES" rrc: %d type: %s pid: %d "
- "["LPU64"->"LPU64"] flags: "LPX64" nid: %s "
- "remote: "LPX64" expref: %d pid: %u timeout: %lu\n",
- ldlm_lock_to_ns_name(lock), lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
- lock->l_readers, lock->l_writers,
- ldlm_lockname[lock->l_granted_mode],
- ldlm_lockname[lock->l_req_mode],
- PLDLMRES(resource),
- atomic_read(&resource->lr_refcount),
- ldlm_typename[resource->lr_type],
- lock->l_policy_data.l_flock.pid,
- lock->l_policy_data.l_flock.start,
- lock->l_policy_data.l_flock.end,
- lock->l_flags, nid, lock->l_remote_handle.cookie,
- exp ? atomic_read(&exp->exp_refcount) : -99,
- lock->l_pid, lock->l_callback_timeout);
+ libcfs_debug_msg(msgdata,
+ "%pV ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s pid: %d [%llu->%llu] flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lld\n",
+ &vaf,
+ ldlm_lock_to_ns_name(lock), lock,
+ lock->l_handle.h_cookie,
+ atomic_read(&lock->l_refc),
+ lock->l_readers, lock->l_writers,
+ ldlm_lockname[lock->l_granted_mode],
+ ldlm_lockname[lock->l_req_mode],
+ PLDLMRES(resource),
+ atomic_read(&resource->lr_refcount),
+ ldlm_typename[resource->lr_type],
+ lock->l_policy_data.l_flock.pid,
+ lock->l_policy_data.l_flock.start,
+ lock->l_policy_data.l_flock.end,
+ lock->l_flags, nid,
+ lock->l_remote_handle.cookie,
+ exp ? atomic_read(&exp->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
break;
case LDLM_IBITS:
- libcfs_debug_vmsg2(msgdata, fmt, args,
- " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: "DLDLMRES" bits "LPX64" rrc: %d type: %s "
- "flags: "LPX64" nid: %s remote: "LPX64" expref: %d "
- "pid: %u timeout: %lu lvb_type: %d\n",
- ldlm_lock_to_ns_name(lock),
- lock, lock->l_handle.h_cookie,
- atomic_read(&lock->l_refc),
- lock->l_readers, lock->l_writers,
- ldlm_lockname[lock->l_granted_mode],
- ldlm_lockname[lock->l_req_mode],
- PLDLMRES(resource),
- lock->l_policy_data.l_inodebits.bits,
- atomic_read(&resource->lr_refcount),
- ldlm_typename[resource->lr_type],
- lock->l_flags, nid, lock->l_remote_handle.cookie,
- exp ? atomic_read(&exp->exp_refcount) : -99,
- lock->l_pid, lock->l_callback_timeout,
- lock->l_lvb_type);
+ libcfs_debug_msg(msgdata,
+ "%pV ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " bits %#llx/%#llx rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lld lvb_type: %d\n",
+ &vaf,
+ ldlm_lock_to_ns_name(lock),
+ lock, lock->l_handle.h_cookie,
+ atomic_read(&lock->l_refc),
+ lock->l_readers, lock->l_writers,
+ ldlm_lockname[lock->l_granted_mode],
+ ldlm_lockname[lock->l_req_mode],
+ PLDLMRES(resource),
+ lock->l_policy_data.l_inodebits.bits,
+ lock->l_policy_data.l_inodebits.try_bits,
+ atomic_read(&resource->lr_refcount),
+ ldlm_typename[resource->lr_type],
+ lock->l_flags, nid,
+ lock->l_remote_handle.cookie,
+ exp ? atomic_read(&exp->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout,
+ lock->l_lvb_type);
break;
default:
- libcfs_debug_vmsg2(msgdata, fmt, args,
- " ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: "DLDLMRES" rrc: %d type: %s flags: "LPX64" "
- "nid: %s remote: "LPX64" expref: %d pid: %u "
- "timeout: %lu lvb_type: %d\n",
- ldlm_lock_to_ns_name(lock),
- lock, lock->l_handle.h_cookie,
- atomic_read(&lock->l_refc),
- lock->l_readers, lock->l_writers,
- ldlm_lockname[lock->l_granted_mode],
- ldlm_lockname[lock->l_req_mode],
- PLDLMRES(resource),
- atomic_read(&resource->lr_refcount),
- ldlm_typename[resource->lr_type],
- lock->l_flags, nid, lock->l_remote_handle.cookie,
- exp ? atomic_read(&exp->exp_refcount) : -99,
- lock->l_pid, lock->l_callback_timeout,
- lock->l_lvb_type);
+ libcfs_debug_msg(msgdata,
+ "%pV ns: %s lock: %p/%#llx lrc: %d/%d,%d mode: %s/%s res: " DLDLMRES " rrc: %d type: %s flags: %#llx nid: %s remote: %#llx expref: %d pid: %u timeout: %lld lvb_type: %d\n",
+ &vaf,
+ ldlm_lock_to_ns_name(lock),
+ lock, lock->l_handle.h_cookie,
+ atomic_read(&lock->l_refc),
+ lock->l_readers, lock->l_writers,
+ ldlm_lockname[lock->l_granted_mode],
+ ldlm_lockname[lock->l_req_mode],
+ PLDLMRES(resource),
+ atomic_read(&resource->lr_refcount),
+ ldlm_typename[resource->lr_type],
+ lock->l_flags, nid,
+ lock->l_remote_handle.cookie,
+ exp ? atomic_read(&exp->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout,
+ lock->l_lvb_type);
break;
}
va_end(args);
+ ldlm_resource_putref(resource);
}
EXPORT_SYMBOL(_ldlm_lock_debug);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff