* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011 Whamcloud, Inc.
+ *
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifdef __KERNEL__
# include <libcfs/libcfs.h>
-# ifndef HAVE_VFS_INTENT_PATCHES
# include <linux/lustre_intent.h>
-# endif
#else
# include <liblustre.h>
#endif
[LCK_CW] "CW",
[LCK_CR] "CR",
[LCK_NL] "NL",
- [LCK_GROUP] "GROUP"
+ [LCK_GROUP] "GROUP",
+ [LCK_COS] "COS"
};
char *ldlm_typename[] = {
[LDLM_IBITS] "IBT",
};
+static ldlm_policy_wire_to_local_t ldlm_policy_wire_to_local[] = {
+ [LDLM_PLAIN - LDLM_MIN_TYPE] ldlm_plain_policy_wire_to_local,
+ [LDLM_EXTENT - LDLM_MIN_TYPE] ldlm_extent_policy_wire_to_local,
+ [LDLM_FLOCK - LDLM_MIN_TYPE] ldlm_flock_policy_wire_to_local,
+ [LDLM_IBITS - LDLM_MIN_TYPE] ldlm_ibits_policy_wire_to_local,
+};
+
+static ldlm_policy_local_to_wire_t ldlm_policy_local_to_wire[] = {
+ [LDLM_PLAIN - LDLM_MIN_TYPE] ldlm_plain_policy_local_to_wire,
+ [LDLM_EXTENT - LDLM_MIN_TYPE] ldlm_extent_policy_local_to_wire,
+ [LDLM_FLOCK - LDLM_MIN_TYPE] ldlm_flock_policy_local_to_wire,
+ [LDLM_IBITS - LDLM_MIN_TYPE] ldlm_ibits_policy_local_to_wire,
+};
+
+/**
+ * Converts lock policy from local format to on the wire lock_desc format
+ */
+void ldlm_convert_policy_to_wire(ldlm_type_t type,
+ const ldlm_policy_data_t *lpolicy,
+ ldlm_wire_policy_data_t *wpolicy)
+{
+ ldlm_policy_local_to_wire_t convert;
+
+ convert = ldlm_policy_local_to_wire[type - LDLM_MIN_TYPE];
+
+ convert(lpolicy, wpolicy);
+}
+
+/**
+ * Converts lock policy from on the wire lock_desc format to local format
+ */
+void ldlm_convert_policy_to_local(ldlm_type_t type,
+ const ldlm_wire_policy_data_t *wpolicy,
+ ldlm_policy_data_t *lpolicy)
+{
+ ldlm_policy_wire_to_local_t convert;
+
+ convert = ldlm_policy_wire_to_local[type - LDLM_MIN_TYPE];
+
+ convert(wpolicy, lpolicy);
+}
+
char *ldlm_it2str(int it)
{
switch (it) {
return "unlink";
case IT_GETXATTR:
return "getxattr";
+ case IT_LAYOUT:
+ return "layout";
default:
CERROR("Unknown intent %d\n", it);
return "UNKNOWN";
*/
struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock)
{
- atomic_inc(&lock->l_refc);
+ cfs_atomic_inc(&lock->l_refc);
return lock;
}
ENTRY;
LASSERT(lock->l_resource != LP_POISON);
- LASSERT(atomic_read(&lock->l_refc) > 0);
- if (atomic_dec_and_test(&lock->l_refc)) {
+ LASSERT(cfs_atomic_read(&lock->l_refc) > 0);
+ if (cfs_atomic_dec_and_test(&lock->l_refc)) {
struct ldlm_resource *res;
LDLM_DEBUG(lock,
res = lock->l_resource;
LASSERT(lock->l_destroyed);
- LASSERT(list_empty(&lock->l_res_link));
- LASSERT(list_empty(&lock->l_pending_chain));
+ LASSERT(cfs_list_empty(&lock->l_res_link));
+ LASSERT(cfs_list_empty(&lock->l_pending_chain));
- atomic_dec(&res->lr_namespace->ns_locks);
+ lprocfs_counter_decr(ldlm_res_to_ns(res)->ns_stats,
+ LDLM_NSS_LOCKS);
+ lu_ref_del(&res->lr_reference, "lock", lock);
ldlm_resource_putref(res);
lock->l_resource = NULL;
if (lock->l_export) {
- class_export_put(lock->l_export);
+ class_export_lock_put(lock->l_export, lock);
lock->l_export = NULL;
}
OBD_FREE(lock->l_lvb_data, lock->l_lvb_len);
ldlm_interval_free(ldlm_interval_detach(lock));
- OBD_FREE_RCU_CB(lock, sizeof(*lock), &lock->l_handle,
- ldlm_lock_free);
+ lu_ref_fini(&lock->l_reference);
+ OBD_FREE_RCU_CB(lock, sizeof(*lock), &lock->l_handle,
+ ldlm_lock_free);
}
EXIT;
int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock)
{
int rc = 0;
- if (!list_empty(&lock->l_lru)) {
- struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
+ if (!cfs_list_empty(&lock->l_lru)) {
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
+
LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
- list_del_init(&lock->l_lru);
+ cfs_list_del_init(&lock->l_lru);
+ if (lock->l_flags & LDLM_FL_SKIPPED)
+ lock->l_flags &= ~LDLM_FL_SKIPPED;
+ LASSERT(ns->ns_nr_unused > 0);
ns->ns_nr_unused--;
- LASSERT(ns->ns_nr_unused >= 0);
rc = 1;
}
return rc;
int ldlm_lock_remove_from_lru(struct ldlm_lock *lock)
{
- struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
int rc;
+
ENTRY;
- spin_lock(&ns->ns_unused_lock);
+ if (lock->l_ns_srv) {
+ LASSERT(cfs_list_empty(&lock->l_lru));
+ RETURN(0);
+ }
+
+ cfs_spin_lock(&ns->ns_lock);
rc = ldlm_lock_remove_from_lru_nolock(lock);
- spin_unlock(&ns->ns_unused_lock);
+ cfs_spin_unlock(&ns->ns_lock);
EXIT;
return rc;
}
void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock)
{
- struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
+
lock->l_last_used = cfs_time_current();
- LASSERT(list_empty(&lock->l_lru));
+ LASSERT(cfs_list_empty(&lock->l_lru));
LASSERT(lock->l_resource->lr_type != LDLM_FLOCK);
- list_add_tail(&lock->l_lru, &ns->ns_unused_list);
+ cfs_list_add_tail(&lock->l_lru, &ns->ns_unused_list);
LASSERT(ns->ns_nr_unused >= 0);
ns->ns_nr_unused++;
}
void ldlm_lock_add_to_lru(struct ldlm_lock *lock)
{
- struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
+
ENTRY;
- spin_lock(&ns->ns_unused_lock);
+ cfs_spin_lock(&ns->ns_lock);
ldlm_lock_add_to_lru_nolock(lock);
- spin_unlock(&ns->ns_unused_lock);
+ cfs_spin_unlock(&ns->ns_lock);
EXIT;
}
void ldlm_lock_touch_in_lru(struct ldlm_lock *lock)
{
- struct ldlm_namespace *ns = lock->l_resource->lr_namespace;
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
+
ENTRY;
- spin_lock(&ns->ns_unused_lock);
- if (!list_empty(&lock->l_lru)) {
+ if (lock->l_ns_srv) {
+ LASSERT(cfs_list_empty(&lock->l_lru));
+ EXIT;
+ return;
+ }
+
+ cfs_spin_lock(&ns->ns_lock);
+ if (!cfs_list_empty(&lock->l_lru)) {
ldlm_lock_remove_from_lru_nolock(lock);
ldlm_lock_add_to_lru_nolock(lock);
}
- spin_unlock(&ns->ns_unused_lock);
+ cfs_spin_unlock(&ns->ns_lock);
EXIT;
}
LBUG();
}
- if (!list_empty(&lock->l_res_link)) {
+ if (!cfs_list_empty(&lock->l_res_link)) {
LDLM_ERROR(lock, "lock still on resource");
ldlm_lock_dump(D_ERROR, lock, 0);
LBUG();
}
if (lock->l_destroyed) {
- LASSERT(list_empty(&lock->l_lru));
+ LASSERT(cfs_list_empty(&lock->l_lru));
EXIT;
return 0;
}
lock->l_destroyed = 1;
- if (lock->l_export)
- spin_lock(&lock->l_export->exp_ldlm_data.led_lock);
- list_del_init(&lock->l_export_chain);
- if (lock->l_export)
- spin_unlock(&lock->l_export->exp_ldlm_data.led_lock);
+ if (lock->l_export && lock->l_export->exp_lock_hash &&
+ !cfs_hlist_unhashed(&lock->l_exp_hash))
+ cfs_hash_del(lock->l_export->exp_lock_hash,
+ &lock->l_remote_handle, &lock->l_exp_hash);
ldlm_lock_remove_from_lru(lock);
class_handle_unhash(&lock->l_handle);
unlock_res_and_lock(lock);
/* drop reference from hashtable only for first destroy */
- if (first)
- LDLM_LOCK_PUT(lock);
+ if (first) {
+ lu_ref_del(&lock->l_reference, "hash", lock);
+ LDLM_LOCK_RELEASE(lock);
+ }
EXIT;
}
ENTRY;
first = ldlm_lock_destroy_internal(lock);
/* drop reference from hashtable only for first destroy */
- if (first)
- LDLM_LOCK_PUT(lock);
+ if (first) {
+ lu_ref_del(&lock->l_reference, "hash", lock);
+ LDLM_LOCK_RELEASE(lock);
+ }
EXIT;
}
/*
* usage: pass in a resource on which you have done ldlm_resource_get
- * pass in a parent lock on which you have done a ldlm_lock_get
- * after return, ldlm_*_put the resource and parent
+ * new lock will take over the refcount.
* returns: lock with refcount 2 - one for current caller and one for remote
*/
static struct ldlm_lock *ldlm_lock_new(struct ldlm_resource *resource)
if (resource == NULL)
LBUG();
- OBD_SLAB_ALLOC(lock, ldlm_lock_slab, CFS_ALLOC_IO, sizeof(*lock));
+ OBD_SLAB_ALLOC_PTR_GFP(lock, ldlm_lock_slab, CFS_ALLOC_IO);
if (lock == NULL)
RETURN(NULL);
- spin_lock_init(&lock->l_lock);
- lock->l_resource = ldlm_resource_getref(resource);
+ cfs_spin_lock_init(&lock->l_lock);
+ lock->l_resource = resource;
+ lu_ref_add(&resource->lr_reference, "lock", lock);
- atomic_set(&lock->l_refc, 2);
+ cfs_atomic_set(&lock->l_refc, 2);
CFS_INIT_LIST_HEAD(&lock->l_res_link);
CFS_INIT_LIST_HEAD(&lock->l_lru);
- CFS_INIT_LIST_HEAD(&lock->l_export_chain);
CFS_INIT_LIST_HEAD(&lock->l_pending_chain);
CFS_INIT_LIST_HEAD(&lock->l_bl_ast);
CFS_INIT_LIST_HEAD(&lock->l_cp_ast);
+ CFS_INIT_LIST_HEAD(&lock->l_rk_ast);
cfs_waitq_init(&lock->l_waitq);
lock->l_blocking_lock = NULL;
CFS_INIT_LIST_HEAD(&lock->l_sl_mode);
CFS_INIT_LIST_HEAD(&lock->l_sl_policy);
+ CFS_INIT_HLIST_NODE(&lock->l_exp_hash);
- atomic_inc(&resource->lr_namespace->ns_locks);
+ lprocfs_counter_incr(ldlm_res_to_ns(resource)->ns_stats,
+ LDLM_NSS_LOCKS);
CFS_INIT_LIST_HEAD(&lock->l_handle.h_link);
class_handle_hash(&lock->l_handle, lock_handle_addref);
- CFS_INIT_LIST_HEAD(&lock->l_extents_list);
- spin_lock_init(&lock->l_extents_list_lock);
- CFS_INIT_LIST_HEAD(&lock->l_cache_locks_list);
+ lu_ref_init(&lock->l_reference);
+ lu_ref_add(&lock->l_reference, "hash", lock);
+ lock->l_callback_timeout = 0;
+
+#if LUSTRE_TRACKS_LOCK_EXP_REFS
+ CFS_INIT_LIST_HEAD(&lock->l_exp_refs_link);
+ lock->l_exp_refs_nr = 0;
+ lock->l_exp_refs_target = NULL;
+#endif
+ CFS_INIT_LIST_HEAD(&lock->l_exp_list);
RETURN(lock);
}
LASSERT(new_resid->name[0] != 0);
/* This function assumes that the lock isn't on any lists */
- LASSERT(list_empty(&lock->l_res_link));
+ LASSERT(cfs_list_empty(&lock->l_res_link));
type = oldres->lr_type;
unlock_res_and_lock(lock);
if (newres == NULL)
RETURN(-ENOMEM);
- lock_res_and_lock(lock);
- LASSERT(memcmp(new_resid, &lock->l_resource->lr_name,
- sizeof(lock->l_resource->lr_name)) != 0);
- lock_res(newres);
+ lu_ref_add(&newres->lr_reference, "lock", lock);
+ /*
+ * To flip the lock from the old to the new resource, lock, oldres and
+ * newres have to be locked. Resource spin-locks are nested within
+ * lock->l_lock, and are taken in the memory address order to avoid
+ * dead-locks.
+ */
+ cfs_spin_lock(&lock->l_lock);
+ oldres = lock->l_resource;
+ if (oldres < newres) {
+ lock_res(oldres);
+ lock_res_nested(newres, LRT_NEW);
+ } else {
+ lock_res(newres);
+ lock_res_nested(oldres, LRT_NEW);
+ }
+ LASSERT(memcmp(new_resid, &oldres->lr_name,
+ sizeof oldres->lr_name) != 0);
lock->l_resource = newres;
unlock_res(oldres);
unlock_res_and_lock(lock);
/* ...and the flowers are still standing! */
+ lu_ref_del(&oldres->lr_reference, "lock", lock);
ldlm_resource_putref(oldres);
RETURN(0);
struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *handle,
int flags)
{
- struct ldlm_namespace *ns;
- struct ldlm_lock *lock, *retval = NULL;
+ struct ldlm_lock *lock;
ENTRY;
LASSERT(handle);
if (lock == NULL)
RETURN(NULL);
- LASSERT(lock->l_resource != NULL);
- ns = lock->l_resource->lr_namespace;
- LASSERT(ns != NULL);
+ /* It's unlikely but possible that someone marked the lock as
+ * destroyed after we did handle2object on it */
+ if (flags == 0 && !lock->l_destroyed) {
+ lu_ref_add(&lock->l_reference, "handle", cfs_current());
+ RETURN(lock);
+ }
lock_res_and_lock(lock);
- /* It's unlikely but possible that someone marked the lock as
- * destroyed after we did handle2object on it */
- if (lock->l_destroyed) {
+ LASSERT(lock->l_resource != NULL);
+
+ lu_ref_add_atomic(&lock->l_reference, "handle", cfs_current());
+ if (unlikely(lock->l_destroyed)) {
unlock_res_and_lock(lock);
CDEBUG(D_INFO, "lock already destroyed: lock %p\n", lock);
LDLM_LOCK_PUT(lock);
- GOTO(out, retval);
+ RETURN(NULL);
}
if (flags && (lock->l_flags & flags)) {
unlock_res_and_lock(lock);
LDLM_LOCK_PUT(lock);
- GOTO(out, retval);
+ RETURN(NULL);
}
if (flags)
lock->l_flags |= flags;
unlock_res_and_lock(lock);
- retval = lock;
- EXIT;
- out:
- return retval;
-}
-
-struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *ns,
- const struct lustre_handle *handle)
-{
- struct ldlm_lock *retval = NULL;
- retval = __ldlm_handle2lock(handle, 0);
- return retval;
+ RETURN(lock);
}
void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc)
*/
if ((lock->l_resource->lr_type == LDLM_IBITS) &&
(exp && !(exp->exp_connect_flags & OBD_CONNECT_IBITS))) {
- struct ldlm_resource res = *lock->l_resource;
-
/* Make sure all the right bits are set in this lock we
are going to pass to client */
LASSERTF(lock->l_policy_data.l_inodebits.bits ==
- (MDS_INODELOCK_LOOKUP|MDS_INODELOCK_UPDATE),
+ (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
+ MDS_INODELOCK_LAYOUT),
"Inappropriate inode lock bits during "
"conversion " LPU64 "\n",
lock->l_policy_data.l_inodebits.bits);
- res.lr_type = LDLM_PLAIN;
- ldlm_res2desc(&res, &desc->l_resource);
+
+ ldlm_res2desc(lock->l_resource, &desc->l_resource);
+ desc->l_resource.lr_type = LDLM_PLAIN;
+
/* Convert "new" lock mode to something old client can
understand */
if ((lock->l_req_mode == LCK_CR) ||
ldlm_res2desc(lock->l_resource, &desc->l_resource);
desc->l_req_mode = lock->l_req_mode;
desc->l_granted_mode = lock->l_granted_mode;
- desc->l_policy_data = lock->l_policy_data;
+ ldlm_convert_policy_to_wire(lock->l_resource->lr_type,
+ &lock->l_policy_data,
+ &desc->l_policy_data);
}
}
void ldlm_add_bl_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
- struct list_head *work_list)
+ cfs_list_t *work_list)
{
if ((lock->l_flags & LDLM_FL_AST_SENT) == 0) {
LDLM_DEBUG(lock, "lock incompatible; sending blocking AST.");
* discard dirty data, rather than writing back. */
if (new->l_flags & LDLM_AST_DISCARD_DATA)
lock->l_flags |= LDLM_FL_DISCARD_DATA;
- LASSERT(list_empty(&lock->l_bl_ast));
- list_add(&lock->l_bl_ast, work_list);
+ LASSERT(cfs_list_empty(&lock->l_bl_ast));
+ cfs_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);
}
}
-void ldlm_add_cp_work_item(struct ldlm_lock *lock, struct list_head *work_list)
+void ldlm_add_cp_work_item(struct ldlm_lock *lock, cfs_list_t *work_list)
{
if ((lock->l_flags & LDLM_FL_CP_REQD) == 0) {
lock->l_flags |= LDLM_FL_CP_REQD;
LDLM_DEBUG(lock, "lock granted; sending completion AST.");
- LASSERT(list_empty(&lock->l_cp_ast));
- list_add(&lock->l_cp_ast, work_list);
+ LASSERT(cfs_list_empty(&lock->l_cp_ast));
+ cfs_list_add(&lock->l_cp_ast, work_list);
LDLM_LOCK_GET(lock);
}
}
/* must be called with lr_lock held */
void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
- struct list_head *work_list)
+ cfs_list_t *work_list)
{
ENTRY;
check_res_locked(lock->l_resource);
void ldlm_lock_addref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
{
ldlm_lock_remove_from_lru(lock);
- if (mode & (LCK_NL | LCK_CR | LCK_PR))
+ if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
lock->l_readers++;
- if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP))
+ lu_ref_add_atomic(&lock->l_reference, "reader", lock);
+ }
+ if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
lock->l_writers++;
+ lu_ref_add_atomic(&lock->l_reference, "writer", lock);
+ }
LDLM_LOCK_GET(lock);
+ lu_ref_add_atomic(&lock->l_reference, "user", lock);
LDLM_DEBUG(lock, "ldlm_lock_addref(%s)", ldlm_lockname[mode]);
}
+/**
+ * Attempts to addref a lock, and fails if lock is already LDLM_FL_CBPENDING
+ * or destroyed.
+ *
+ * \retval 0 success, lock was addref-ed
+ *
+ * \retval -EAGAIN lock is being canceled.
+ */
+int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode)
+{
+ struct ldlm_lock *lock;
+ int result;
+
+ result = -EAGAIN;
+ lock = ldlm_handle2lock(lockh);
+ if (lock != NULL) {
+ lock_res_and_lock(lock);
+ if (lock->l_readers != 0 || lock->l_writers != 0 ||
+ !(lock->l_flags & LDLM_FL_CBPENDING)) {
+ ldlm_lock_addref_internal_nolock(lock, mode);
+ result = 0;
+ }
+ unlock_res_and_lock(lock);
+ LDLM_LOCK_PUT(lock);
+ }
+ return result;
+}
+
/* only called for local locks */
void ldlm_lock_addref_internal(struct ldlm_lock *lock, __u32 mode)
{
unlock_res_and_lock(lock);
}
-void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
+/* only called in ldlm_flock_destroy and for local locks.
+ * * for LDLM_FLOCK type locks, l_blocking_ast is null, and
+ * * ldlm_lock_remove_from_lru() does nothing, it is safe
+ * * for ldlm_flock_destroy usage by dropping some code */
+void ldlm_lock_decref_internal_nolock(struct ldlm_lock *lock, __u32 mode)
{
- struct ldlm_namespace *ns;
- ENTRY;
-
- lock_res_and_lock(lock);
-
- ns = lock->l_resource->lr_namespace;
-
LDLM_DEBUG(lock, "ldlm_lock_decref(%s)", ldlm_lockname[mode]);
if (mode & (LCK_NL | LCK_CR | LCK_PR)) {
LASSERT(lock->l_readers > 0);
+ lu_ref_del(&lock->l_reference, "reader", lock);
lock->l_readers--;
}
- if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP)) {
+ if (mode & (LCK_EX | LCK_CW | LCK_PW | LCK_GROUP | LCK_COS)) {
LASSERT(lock->l_writers > 0);
+ lu_ref_del(&lock->l_reference, "writer", lock);
lock->l_writers--;
}
+ lu_ref_del(&lock->l_reference, "user", lock);
+ LDLM_LOCK_RELEASE(lock); /* matches the LDLM_LOCK_GET() in addref */
+}
+
+void ldlm_lock_decref_internal(struct ldlm_lock *lock, __u32 mode)
+{
+ struct ldlm_namespace *ns;
+ ENTRY;
+
+ lock_res_and_lock(lock);
+
+ ns = ldlm_lock_to_ns(lock);
+
+ ldlm_lock_decref_internal_nolock(lock, mode);
+
if (lock->l_flags & LDLM_FL_LOCAL &&
!lock->l_readers && !lock->l_writers) {
/* If this is a local lock on a server namespace and this was
(lock->l_flags & LDLM_FL_CBPENDING)) {
/* If we received a blocked AST and this was the last reference,
* run the callback. */
- if (ns_is_server(ns) && lock->l_export)
+ if (lock->l_ns_srv && lock->l_export)
CERROR("FL_CBPENDING set on non-local lock--just a "
"warning\n");
LDLM_LOCK_GET(lock); /* dropped by bl thread */
ldlm_lock_remove_from_lru(lock);
unlock_res_and_lock(lock);
+
+ if (lock->l_flags & LDLM_FL_FAIL_LOC)
+ OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
+
if ((lock->l_flags & LDLM_FL_ATOMIC_CB) ||
ldlm_bl_to_thread_lock(ns, NULL, lock) != 0)
ldlm_handle_bl_callback(ns, NULL, lock);
!lock->l_readers && !lock->l_writers &&
!(lock->l_flags & LDLM_FL_NO_LRU) &&
!(lock->l_flags & LDLM_FL_BL_AST)) {
+
+ LDLM_DEBUG(lock, "add lock into lru list");
+
/* If this is a client-side namespace and this was the last
* reference, put it on the LRU. */
ldlm_lock_add_to_lru(lock);
unlock_res_and_lock(lock);
- /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
- * are not supported by the server, otherwise, it is done on
+
+ if (lock->l_flags & LDLM_FL_FAIL_LOC)
+ OBD_RACE(OBD_FAIL_LDLM_CP_BL_RACE);
+
+ /* Call ldlm_cancel_lru() only if EARLY_CANCEL and LRU RESIZE
+ * are not supported by the server, otherwise, it is done on
* enqueue. */
- if (!exp_connect_cancelset(lock->l_conn_export) &&
+ if (!exp_connect_cancelset(lock->l_conn_export) &&
!ns_connect_lru_resize(ns))
ldlm_cancel_lru(ns, 0, LDLM_ASYNC, 0);
} else {
+ LDLM_DEBUG(lock, "do not add lock into lru list");
unlock_res_and_lock(lock);
}
- LDLM_LOCK_PUT(lock); /* matches the ldlm_lock_get in addref */
-
EXIT;
}
}
struct sl_insert_point {
- struct list_head *res_link;
- struct list_head *mode_link;
- struct list_head *policy_link;
+ cfs_list_t *res_link;
+ cfs_list_t *mode_link;
+ cfs_list_t *policy_link;
};
/*
* NOTE: called by
* - ldlm_grant_lock_with_skiplist
*/
-static void search_granted_lock(struct list_head *queue,
+static void search_granted_lock(cfs_list_t *queue,
struct ldlm_lock *req,
struct sl_insert_point *prev)
{
- struct list_head *tmp;
+ cfs_list_t *tmp;
struct ldlm_lock *lock, *mode_end, *policy_end;
ENTRY;
- list_for_each(tmp, queue) {
- lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+ cfs_list_for_each(tmp, queue) {
+ lock = cfs_list_entry(tmp, struct ldlm_lock, l_res_link);
- mode_end = list_entry(lock->l_sl_mode.prev, struct ldlm_lock,
- l_sl_mode);
+ mode_end = cfs_list_entry(lock->l_sl_mode.prev,
+ struct ldlm_lock, l_sl_mode);
if (lock->l_req_mode != req->l_req_mode) {
/* jump to last lock of mode group */
return;
} else if (lock->l_resource->lr_type == LDLM_IBITS) {
for (;;) {
- policy_end = list_entry(lock->l_sl_policy.prev,
- struct ldlm_lock,
- l_sl_policy);
+ policy_end =
+ cfs_list_entry(lock->l_sl_policy.prev,
+ struct ldlm_lock,
+ l_sl_policy);
if (lock->l_policy_data.l_inodebits.bits ==
req->l_policy_data.l_inodebits.bits) {
/* done with mode group */
break;
- /* jump to next policy group within the mode group */
+ /* go to next policy group within mode group */
tmp = policy_end->l_res_link.next;
- lock = list_entry(tmp, struct ldlm_lock,
- l_res_link);
+ lock = cfs_list_entry(tmp, struct ldlm_lock,
+ l_res_link);
} /* loop over policy groups within the mode group */
/* insert point is last lock of the mode group,
EXIT;
return;
} else {
- LDLM_ERROR(lock, "is not LDLM_PLAIN or LDLM_IBITS lock");
+ LDLM_ERROR(lock,"is not LDLM_PLAIN or LDLM_IBITS lock");
LBUG();
}
}
return;
}
-static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
+static void ldlm_granted_list_add_lock(struct ldlm_lock *lock,
struct sl_insert_point *prev)
{
struct ldlm_resource *res = lock->l_resource;
check_res_locked(res);
- ldlm_resource_dump(D_OTHER, res);
+ ldlm_resource_dump(D_INFO, res);
CDEBUG(D_OTHER, "About to add this lock:\n");
ldlm_lock_dump(D_OTHER, lock, 0);
return;
}
- LASSERT(list_empty(&lock->l_res_link));
- LASSERT(list_empty(&lock->l_sl_mode));
- LASSERT(list_empty(&lock->l_sl_policy));
+ LASSERT(cfs_list_empty(&lock->l_res_link));
+ LASSERT(cfs_list_empty(&lock->l_sl_mode));
+ LASSERT(cfs_list_empty(&lock->l_sl_policy));
- list_add(&lock->l_res_link, prev->res_link);
- list_add(&lock->l_sl_mode, prev->mode_link);
- list_add(&lock->l_sl_policy, prev->policy_link);
+ cfs_list_add(&lock->l_res_link, prev->res_link);
+ cfs_list_add(&lock->l_sl_mode, prev->mode_link);
+ cfs_list_add(&lock->l_sl_policy, prev->policy_link);
EXIT;
}
*
* must be called with lr_lock held
*/
-void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list)
+void ldlm_grant_lock(struct ldlm_lock *lock, cfs_list_t *work_list)
{
struct ldlm_resource *res = lock->l_resource;
ENTRY;
if (work_list && lock->l_completion_ast != NULL)
ldlm_add_ast_work_item(lock, NULL, work_list);
- ldlm_pool_add(&res->lr_namespace->ns_pool, lock);
+ ldlm_pool_add(&ldlm_res_to_ns(res)->ns_pool, lock);
EXIT;
}
/* returns a referenced lock or NULL. See the flag descriptions below, in the
* comment above ldlm_lock_match */
-static struct ldlm_lock *search_queue(struct list_head *queue,
+static struct ldlm_lock *search_queue(cfs_list_t *queue,
ldlm_mode_t *mode,
ldlm_policy_data_t *policy,
- struct ldlm_lock *old_lock, int flags)
+ struct ldlm_lock *old_lock,
+ int flags, int unref)
{
struct ldlm_lock *lock;
- struct list_head *tmp;
+ cfs_list_t *tmp;
- list_for_each(tmp, queue) {
+ cfs_list_for_each(tmp, queue) {
ldlm_mode_t match;
- lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+ lock = cfs_list_entry(tmp, struct ldlm_lock, l_res_link);
if (lock == old_lock)
break;
if (lock->l_flags & LDLM_FL_CBPENDING &&
!(flags & LDLM_FL_CBPENDING))
continue;
- if (lock->l_flags & LDLM_FL_CBPENDING &&
+ if (!unref && lock->l_flags & LDLM_FL_CBPENDING &&
lock->l_readers == 0 && lock->l_writers == 0)
continue;
policy->l_inodebits.bits))
continue;
- if (lock->l_destroyed || (lock->l_flags & LDLM_FL_FAILED))
+ if (!unref &&
+ (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
+ lock->l_failed))
continue;
if ((flags & LDLM_FL_LOCAL_ONLY) &&
return NULL;
}
-void ldlm_lock_allow_match(struct ldlm_lock *lock)
+void ldlm_lock_fail_match_locked(struct ldlm_lock *lock)
+{
+ if (!lock->l_failed) {
+ lock->l_failed = 1;
+ cfs_waitq_broadcast(&lock->l_waitq);
+ }
+}
+EXPORT_SYMBOL(ldlm_lock_fail_match_locked);
+
+void ldlm_lock_fail_match(struct ldlm_lock *lock)
{
lock_res_and_lock(lock);
- lock->l_flags |= LDLM_FL_LVB_READY;
- cfs_waitq_signal(&lock->l_waitq);
+ ldlm_lock_fail_match_locked(lock);
unlock_res_and_lock(lock);
}
+EXPORT_SYMBOL(ldlm_lock_fail_match);
-/**
- * Checks if requested extent lock is compatible with another owned lock.
- *
- * Checks if \a lock is compatible with a read or write lock
- * (specified by \a rw) for an extent [\a start , \a end].
- *
- * \param lock the already owned lock
- * \param rw OBD_BRW_READ if requested for reading,
- * OBD_BRW_WRITE if requested for writing
- * \param start start of the requested extent
- * \param end end of the requested extent
- * \param cookie transparent parameter for passing locking context
- *
- * \post result == 1, *cookie == context, appropriate lock is referenced
- *
- * \retval 1 owned lock is reused for the request
- * \retval 0 no lock reused for the request
- *
- * \see ldlm_lock_fast_release
- */
-int ldlm_lock_fast_match(struct ldlm_lock *lock, int rw,
- obd_off start, obd_off end,
- void **cookie)
-{
- LASSERT(rw == OBD_BRW_READ || rw == OBD_BRW_WRITE);
- /* should LCK_GROUP be handled in a special way? */
- if (lock && (rw == OBD_BRW_READ ||
- (lock->l_granted_mode & (LCK_PW | LCK_GROUP))) &&
- (lock->l_policy_data.l_extent.start <= start) &&
- (lock->l_policy_data.l_extent.end >= end)) {
- ldlm_lock_addref_internal(lock, rw == OBD_BRW_WRITE ? LCK_PW : LCK_PR);
- *cookie = (void *)lock;
- return 1; /* avoid using rc for stack relief */
- }
- return 0;
+void ldlm_lock_allow_match_locked(struct ldlm_lock *lock)
+{
+ lock->l_flags |= LDLM_FL_LVB_READY;
+ cfs_waitq_broadcast(&lock->l_waitq);
}
-/**
- * Releases a reference to a lock taken in a "fast" way.
- *
- * Releases a read or write (specified by \a rw) lock
- * referenced by \a cookie.
- *
- * \param rw OBD_BRW_READ if requested for reading,
- * OBD_BRW_WRITE if requested for writing
- * \param cookie transparent parameter for passing locking context
- *
- * \post appropriate lock is dereferenced
- *
- * \see ldlm_lock_fast_lock
- */
-void ldlm_lock_fast_release(void *cookie, int rw)
+void ldlm_lock_allow_match(struct ldlm_lock *lock)
{
- struct ldlm_lock *lock = (struct ldlm_lock *)cookie;
-
- LASSERT(lock != NULL);
- LASSERT(rw == OBD_BRW_READ || rw == OBD_BRW_WRITE);
- LASSERT(rw == OBD_BRW_READ ||
- (lock->l_granted_mode & (LCK_PW | LCK_GROUP)));
- ldlm_lock_decref_internal(lock, rw == OBD_BRW_WRITE ? LCK_PW : LCK_PR);
+ lock_res_and_lock(lock);
+ ldlm_lock_allow_match_locked(lock);
+ unlock_res_and_lock(lock);
}
/* Can be called in two ways:
ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, int flags,
const struct ldlm_res_id *res_id, ldlm_type_t type,
ldlm_policy_data_t *policy, ldlm_mode_t mode,
- struct lustre_handle *lockh)
+ struct lustre_handle *lockh, int unref)
{
struct ldlm_resource *res;
struct ldlm_lock *lock, *old_lock = NULL;
old_lock = ldlm_handle2lock(lockh);
LASSERT(old_lock);
- ns = old_lock->l_resource->lr_namespace;
+ ns = ldlm_lock_to_ns(old_lock);
res_id = &old_lock->l_resource->lr_name;
type = old_lock->l_resource->lr_type;
mode = old_lock->l_req_mode;
RETURN(0);
}
+ LDLM_RESOURCE_ADDREF(res);
lock_res(res);
- lock = search_queue(&res->lr_granted, &mode, policy, old_lock, flags);
+ lock = search_queue(&res->lr_granted, &mode, policy, old_lock,
+ flags, unref);
if (lock != NULL)
GOTO(out, rc = 1);
if (flags & LDLM_FL_BLOCK_GRANTED)
GOTO(out, rc = 0);
- lock = search_queue(&res->lr_converting, &mode, policy, old_lock, flags);
+ lock = search_queue(&res->lr_converting, &mode, policy, old_lock,
+ flags, unref);
if (lock != NULL)
GOTO(out, rc = 1);
- lock = search_queue(&res->lr_waiting, &mode, policy, old_lock, flags);
+ lock = search_queue(&res->lr_waiting, &mode, policy, old_lock,
+ flags, unref);
if (lock != NULL)
GOTO(out, rc = 1);
EXIT;
out:
unlock_res(res);
+ LDLM_RESOURCE_DELREF(res);
ldlm_resource_putref(res);
if (lock) {
NULL);
if (err) {
if (flags & LDLM_FL_TEST_LOCK)
- LDLM_LOCK_PUT(lock);
+ LDLM_LOCK_RELEASE(lock);
else
- ldlm_lock_decref_internal(lock, mode);
+ ldlm_lock_decref_internal(lock,
+ mode);
rc = 0;
goto out2;
}
}
- 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 & LDLM_FL_LVB_READY), &lwi);
+ lock->l_flags & LDLM_FL_LVB_READY ||
+ lock->l_failed,
+ &lwi);
+ if (!(lock->l_flags & LDLM_FL_LVB_READY)) {
+ if (flags & LDLM_FL_TEST_LOCK)
+ LDLM_LOCK_RELEASE(lock);
+ else
+ ldlm_lock_decref_internal(lock, mode);
+ rc = 0;
+ }
}
}
out2:
}
if (flags & LDLM_FL_TEST_LOCK)
- LDLM_LOCK_PUT(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 "
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) ?
+ (type == LDLM_PLAIN || type == LDLM_IBITS) ?
res_id->name[3] : policy->l_extent.end);
}
if (old_lock)
return rc ? mode : 0;
}
+ldlm_mode_t ldlm_revalidate_lock_handle(struct lustre_handle *lockh,
+ __u64 *bits)
+{
+ struct ldlm_lock *lock;
+ ldlm_mode_t mode = 0;
+ ENTRY;
+
+ lock = ldlm_handle2lock(lockh);
+ if (lock != NULL) {
+ lock_res_and_lock(lock);
+ if (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED ||
+ lock->l_failed)
+ GOTO(out, mode);
+
+ if (lock->l_flags & LDLM_FL_CBPENDING &&
+ lock->l_readers == 0 && lock->l_writers == 0)
+ GOTO(out, mode);
+
+ if (bits)
+ *bits = lock->l_policy_data.l_inodebits.bits;
+ mode = lock->l_granted_mode;
+ ldlm_lock_addref_internal_nolock(lock, mode);
+ }
+
+ EXIT;
+
+out:
+ if (lock != NULL) {
+ unlock_res_and_lock(lock);
+ LDLM_LOCK_PUT(lock);
+ }
+ return mode;
+}
+EXPORT_SYMBOL(ldlm_revalidate_lock_handle);
+
/* Returns a referenced lock */
struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
const struct ldlm_res_id *res_id,
ldlm_type_t type,
ldlm_mode_t mode,
- ldlm_blocking_callback blocking,
- ldlm_completion_callback completion,
- ldlm_glimpse_callback glimpse,
+ const struct ldlm_callback_suite *cbs,
void *data, __u32 lvb_len)
{
struct ldlm_lock *lock;
RETURN(NULL);
lock = ldlm_lock_new(res);
- ldlm_resource_putref(res);
if (lock == NULL)
RETURN(NULL);
lock->l_req_mode = mode;
lock->l_ast_data = data;
- lock->l_blocking_ast = blocking;
- lock->l_completion_ast = completion;
- lock->l_glimpse_ast = glimpse;
lock->l_pid = cfs_curproc_pid();
+ lock->l_ns_srv = !!ns_is_server(ns);
+ if (cbs) {
+ lock->l_blocking_ast = cbs->lcs_blocking;
+ lock->l_completion_ast = cbs->lcs_completion;
+ lock->l_glimpse_ast = cbs->lcs_glimpse;
+ lock->l_weigh_ast = cbs->lcs_weigh;
+ }
lock->l_tree_node = NULL;
/* if this is the extent lock, allocate the interval tree node */
GOTO(out, 0);
}
+ if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_NEW_LOCK))
+ GOTO(out, 0);
+
RETURN(lock);
out:
- if (lock->l_lvb_data)
- OBD_FREE(lock->l_lvb_data, lvb_len);
- ldlm_interval_free(ldlm_interval_detach(lock));
- OBD_SLAB_FREE(lock, ldlm_lock_slab, sizeof(*lock));
+ ldlm_lock_destroy(lock);
+ LDLM_LOCK_RELEASE(lock);
return NULL;
}
{
struct ldlm_lock *lock = *lockp;
struct ldlm_resource *res = lock->l_resource;
- int local = ns_is_client(res->lr_namespace);
+ int local = ns_is_client(ldlm_res_to_ns(res));
ldlm_processing_policy policy;
ldlm_error_t rc = ELDLM_OK;
struct ldlm_interval *node = NULL;
ENTRY;
- do_gettimeofday(&lock->l_enqueued_time);
+ lock->l_last_activity = cfs_time_current_sec();
/* 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) {
* work here is done. */
if (lock != *lockp) {
ldlm_lock_destroy(lock);
- LDLM_LOCK_PUT(lock);
+ LDLM_LOCK_RELEASE(lock);
}
*flags |= LDLM_FL_LOCK_CHANGED;
RETURN(0);
* have to allocate the interval node early otherwise we can't regrant
* this lock in the future. - jay */
if (!local && (*flags & LDLM_FL_REPLAY) && res->lr_type == LDLM_EXTENT)
- OBD_SLAB_ALLOC(node, ldlm_interval_slab, CFS_ALLOC_IO,
- sizeof(*node));
+ OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, CFS_ALLOC_IO);
lock_res_and_lock(lock);
if (local && lock->l_req_mode == lock->l_granted_mode) {
}
/* Must be called with namespace taken: queue is waiting or converting. */
-int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
- struct list_head *work_list)
+int ldlm_reprocess_queue(struct ldlm_resource *res, cfs_list_t *queue,
+ cfs_list_t *work_list)
{
- struct list_head *tmp, *pos;
+ cfs_list_t *tmp, *pos;
ldlm_processing_policy policy;
int flags;
int rc = LDLM_ITER_CONTINUE;
policy = ldlm_processing_policy_table[res->lr_type];
LASSERT(policy);
- list_for_each_safe(tmp, pos, queue) {
+ cfs_list_for_each_safe(tmp, pos, queue) {
struct ldlm_lock *pending;
- pending = list_entry(tmp, struct ldlm_lock, l_res_link);
+ pending = cfs_list_entry(tmp, struct ldlm_lock, l_res_link);
CDEBUG(D_INFO, "Reprocessing lock %p\n", pending);
RETURN(rc);
}
-/* Helper function for ldlm_run_ast_work().
- *
- * Send an existing rpc set specified by @arg->set and then
- * destroy it. Create new one if @do_create flag is set. */
-static void
-ldlm_send_and_maybe_create_set(struct ldlm_cb_set_arg *arg, int do_create)
-{
- ENTRY;
-
- ptlrpc_set_wait(arg->set);
- if (arg->type == LDLM_BL_CALLBACK)
- OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_GLIMPSE, 2);
- ptlrpc_set_destroy(arg->set);
-
- if (do_create)
- arg->set = ptlrpc_prep_set();
-
- EXIT;
-}
-
static int
-ldlm_work_bl_ast_lock(struct list_head *tmp, struct ldlm_cb_set_arg *arg)
+ldlm_work_bl_ast_lock(cfs_list_t *tmp, struct ldlm_cb_set_arg *arg)
{
struct ldlm_lock_desc d;
- struct ldlm_lock *lock = list_entry(tmp, struct ldlm_lock, l_bl_ast);
+ struct ldlm_lock *lock = cfs_list_entry(tmp, struct ldlm_lock,
+ l_bl_ast);
+ int rc;
ENTRY;
/* nobody should touch l_bl_ast */
lock_res_and_lock(lock);
- list_del_init(&lock->l_bl_ast);
+ cfs_list_del_init(&lock->l_bl_ast);
LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
LASSERT(lock->l_bl_ast_run == 0);
ldlm_lock2desc(lock->l_blocking_lock, &d);
- LDLM_LOCK_PUT(lock->l_blocking_lock);
+ rc = lock->l_blocking_ast(lock, &d, (void *)arg,
+ LDLM_CB_BLOCKING);
+ LDLM_LOCK_RELEASE(lock->l_blocking_lock);
lock->l_blocking_lock = NULL;
- lock->l_blocking_ast(lock, &d, (void *)arg,
- LDLM_CB_BLOCKING);
- LDLM_LOCK_PUT(lock);
+ LDLM_LOCK_RELEASE(lock);
- RETURN(1);
+ RETURN(rc);
}
static int
-ldlm_work_cp_ast_lock(struct list_head *tmp, struct ldlm_cb_set_arg *arg)
+ldlm_work_cp_ast_lock(cfs_list_t *tmp, struct ldlm_cb_set_arg *arg)
{
- struct ldlm_lock *lock = list_entry(tmp, struct ldlm_lock, l_cp_ast);
+ struct ldlm_lock *lock = cfs_list_entry(tmp, struct ldlm_lock, l_cp_ast);
ldlm_completion_callback completion_callback;
int rc = 0;
ENTRY;
/* nobody should touch l_cp_ast */
lock_res_and_lock(lock);
- list_del_init(&lock->l_cp_ast);
+ cfs_list_del_init(&lock->l_cp_ast);
LASSERT(lock->l_flags & LDLM_FL_CP_REQD);
/* save l_completion_ast since it can be changed by
* mds_intent_policy(), see bug 14225 */
lock->l_flags &= ~LDLM_FL_CP_REQD;
unlock_res_and_lock(lock);
- if (completion_callback != NULL) {
- completion_callback(lock, 0, (void *)arg);
- rc = 1;
- }
- LDLM_LOCK_PUT(lock);
+ if (completion_callback != NULL)
+ rc = completion_callback(lock, 0, (void *)arg);
+ LDLM_LOCK_RELEASE(lock);
RETURN(rc);
}
static int
-ldlm_work_revoke_ast_lock(struct list_head *tmp, struct ldlm_cb_set_arg *arg)
+ldlm_work_revoke_ast_lock(cfs_list_t *tmp, struct ldlm_cb_set_arg *arg)
{
struct ldlm_lock_desc desc;
- struct ldlm_lock *lock = list_entry(tmp, struct ldlm_lock, l_export_chain);
+ struct ldlm_lock *lock = cfs_list_entry(tmp, struct ldlm_lock,
+ l_rk_ast);
+ int rc;
ENTRY;
- list_del_init(&lock->l_export_chain);
+ cfs_list_del_init(&lock->l_rk_ast);
/* the desc just pretend to exclusive */
ldlm_lock2desc(lock, &desc);
desc.l_req_mode = LCK_EX;
desc.l_granted_mode = 0;
- lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
- LDLM_LOCK_PUT(lock);
+ rc = lock->l_blocking_ast(lock, &desc, (void*)arg, LDLM_CB_BLOCKING);
+ LDLM_LOCK_RELEASE(lock);
- RETURN(1);
+ RETURN(rc);
}
-int ldlm_run_ast_work(struct list_head *rpc_list, ldlm_desc_ast_t ast_type)
+int ldlm_run_ast_work(struct ldlm_namespace *ns, cfs_list_t *rpc_list,
+ ldlm_desc_ast_t ast_type)
{
- struct ldlm_cb_set_arg arg;
- struct list_head *tmp, *pos;
- int (*work_ast_lock)(struct list_head *tmp, struct ldlm_cb_set_arg *arg);
- int ast_count;
+ struct l_wait_info lwi = { 0 };
+ struct ldlm_cb_set_arg *arg;
+ cfs_list_t *tmp, *pos;
+ int (*work_ast_lock)(cfs_list_t *tmp, struct ldlm_cb_set_arg *arg);
+ unsigned int max_ast_count;
+ int rc;
ENTRY;
- arg.set = ptlrpc_prep_set();
- atomic_set(&arg.restart, 0);
+ if (cfs_list_empty(rpc_list))
+ RETURN(0);
+
+ OBD_ALLOC_PTR(arg);
+ if (arg == NULL)
+ RETURN(-ENOMEM);
+
+ cfs_atomic_set(&arg->restart, 0);
+ cfs_atomic_set(&arg->rpcs, 0);
+ cfs_atomic_set(&arg->refcount, 1);
+ cfs_waitq_init(&arg->waitq);
+
switch (ast_type) {
case LDLM_WORK_BL_AST:
- arg.type = LDLM_BL_CALLBACK;
+ arg->type = LDLM_BL_CALLBACK;
work_ast_lock = ldlm_work_bl_ast_lock;
break;
case LDLM_WORK_CP_AST:
- arg.type = LDLM_CP_CALLBACK;
+ arg->type = LDLM_CP_CALLBACK;
work_ast_lock = ldlm_work_cp_ast_lock;
break;
case LDLM_WORK_REVOKE_AST:
- arg.type = LDLM_BL_CALLBACK;
+ arg->type = LDLM_BL_CALLBACK;
work_ast_lock = ldlm_work_revoke_ast_lock;
break;
default:
LBUG();
}
- ast_count = 0;
- list_for_each_safe(tmp, pos, rpc_list) {
- ast_count += work_ast_lock(tmp, &arg);
+ max_ast_count = ns->ns_max_parallel_ast ? : UINT_MAX;
+ arg->threshold = max_ast_count;
- /* Send the request set if it exceeds the PARALLEL_AST_LIMIT,
- * and create a new set for requests that remained in
- * @rpc_list */
- if (unlikely(ast_count == PARALLEL_AST_LIMIT)) {
- ldlm_send_and_maybe_create_set(&arg, 1);
- ast_count = 0;
- }
+ cfs_list_for_each_safe(tmp, pos, rpc_list) {
+ (void)work_ast_lock(tmp, arg);
+ if (cfs_atomic_read(&arg->rpcs) < max_ast_count)
+ continue;
+
+ l_wait_event(arg->waitq,
+ cfs_atomic_read(&arg->rpcs) < arg->threshold,
+ &lwi);
}
- if (ast_count > 0)
- ldlm_send_and_maybe_create_set(&arg, 0);
- else
- /* In case when number of ASTs is multiply of
- * PARALLEL_AST_LIMIT or @rpc_list was initially empty,
- * @arg.set must be destroyed here, otherwise we get
- * write memory leaking. */
- ptlrpc_set_destroy(arg.set);
+ arg->threshold = 1;
+ l_wait_event(arg->waitq, cfs_atomic_read(&arg->rpcs) == 0, &lwi);
- RETURN(atomic_read(&arg.restart) ? -ERESTART : 0);
+ rc = cfs_atomic_read(&arg->restart) ? -ERESTART : 0;
+ ldlm_csa_put(arg);
+ RETURN(rc);
}
static int reprocess_one_queue(struct ldlm_resource *res, void *closure)
return LDLM_ITER_CONTINUE;
}
-void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
+static int ldlm_reprocess_res(cfs_hash_t *hs, cfs_hash_bd_t *bd,
+ cfs_hlist_node_t *hnode, void *arg)
{
- struct list_head *tmp;
- int i, rc;
+ struct ldlm_resource *res = cfs_hash_object(hs, hnode);
+ int rc;
- if (ns == NULL)
- return;
-
- ENTRY;
- spin_lock(&ns->ns_hash_lock);
- for (i = 0; i < RES_HASH_SIZE; i++) {
- tmp = ns->ns_hash[i].next;
- while (tmp != &(ns->ns_hash[i])) {
- struct ldlm_resource *res =
- list_entry(tmp, struct ldlm_resource, lr_hash);
-
- ldlm_resource_getref(res);
- spin_unlock(&ns->ns_hash_lock);
+ rc = reprocess_one_queue(res, arg);
- rc = reprocess_one_queue(res, NULL);
+ return rc == LDLM_ITER_STOP;
+}
- spin_lock(&ns->ns_hash_lock);
- tmp = tmp->next;
- ldlm_resource_putref_locked(res);
+void ldlm_reprocess_all_ns(struct ldlm_namespace *ns)
+{
+ ENTRY;
- if (rc == LDLM_ITER_STOP)
- GOTO(out, rc);
- }
+ if (ns != NULL) {
+ cfs_hash_for_each_nolock(ns->ns_rs_hash,
+ ldlm_reprocess_res, NULL);
}
- out:
- spin_unlock(&ns->ns_hash_lock);
EXIT;
}
ENTRY;
/* Local lock trees don't get reprocessed. */
- if (ns_is_client(res->lr_namespace)) {
+ if (ns_is_client(ldlm_res_to_ns(res))) {
EXIT;
return;
}
ldlm_reprocess_queue(res, &res->lr_waiting, &rpc_list);
unlock_res(res);
- rc = ldlm_run_ast_work(&rpc_list, LDLM_WORK_CP_AST);
+ rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &rpc_list,
+ LDLM_WORK_CP_AST);
if (rc == -ERESTART) {
- LASSERT(list_empty(&rpc_list));
+ LASSERT(cfs_list_empty(&rpc_list));
goto restart;
}
EXIT;
req->l_resource->lr_type != LDLM_IBITS)
return;
- list_del_init(&req->l_sl_policy);
- list_del_init(&req->l_sl_mode);
+ cfs_list_del_init(&req->l_sl_policy);
+ cfs_list_del_init(&req->l_sl_mode);
}
void ldlm_lock_cancel(struct ldlm_lock *lock)
lock_res_and_lock(lock);
res = lock->l_resource;
- ns = res->lr_namespace;
+ ns = ldlm_res_to_ns(res);
/* Please do not, no matter how tempting, remove this LBUG without
* talking to me first. -phik */
/* Yes, second time, just in case it was added again while we were
running with no res lock in ldlm_cancel_callback */
- ldlm_del_waiting_lock(lock);
+ ldlm_del_waiting_lock(lock);
ldlm_resource_unlink_lock(lock);
ldlm_lock_destroy_nolock(lock);
/* Make sure we will not be called again for same lock what is possible
* if not to zero out lock->l_granted_mode */
- lock->l_granted_mode = 0;
+ lock->l_granted_mode = LCK_MINMODE;
unlock_res_and_lock(lock);
EXIT;
int ldlm_lock_set_data(struct lustre_handle *lockh, void *data)
{
struct ldlm_lock *lock = ldlm_handle2lock(lockh);
+ int rc = -EINVAL;
ENTRY;
- if (lock == NULL)
- RETURN(-EINVAL);
+ if (lock) {
+ if (lock->l_ast_data == NULL)
+ lock->l_ast_data = data;
+ if (lock->l_ast_data == data)
+ rc = 0;
+ LDLM_LOCK_PUT(lock);
+ }
+ RETURN(rc);
+}
+EXPORT_SYMBOL(ldlm_lock_set_data);
- lock->l_ast_data = data;
- LDLM_LOCK_PUT(lock);
- RETURN(0);
+int ldlm_cancel_locks_for_export_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
+ cfs_hlist_node_t *hnode, void *data)
+
+{
+ struct obd_export *exp = data;
+ struct ldlm_lock *lock = cfs_hash_object(hs, hnode);
+ struct ldlm_resource *res;
+
+ res = ldlm_resource_getref(lock->l_resource);
+ LDLM_LOCK_GET(lock);
+
+ LDLM_DEBUG(lock, "export %p", exp);
+ ldlm_res_lvbo_update(res, NULL, 1);
+ ldlm_lock_cancel(lock);
+ ldlm_reprocess_all(res);
+ ldlm_resource_putref(res);
+ LDLM_LOCK_RELEASE(lock);
+ return 0;
}
void ldlm_cancel_locks_for_export(struct obd_export *exp)
{
- struct ldlm_lock *lock;
- struct ldlm_resource *res;
+ cfs_hash_for_each_empty(exp->exp_lock_hash,
+ ldlm_cancel_locks_for_export_cb, exp);
+}
- spin_lock(&exp->exp_ldlm_data.led_lock);
- while(!list_empty(&exp->exp_ldlm_data.led_held_locks)) {
- lock = list_entry(exp->exp_ldlm_data.led_held_locks.next,
- struct ldlm_lock, l_export_chain);
- res = ldlm_resource_getref(lock->l_resource);
- LDLM_LOCK_GET(lock);
- spin_unlock(&exp->exp_ldlm_data.led_lock);
+/**
+ * Downgrade an exclusive lock.
+ *
+ * A fast variant of ldlm_lock_convert for convertion of exclusive
+ * locks. The convertion is always successful.
+ *
+ * \param lock A lock to convert
+ * \param new_mode new lock mode
+ */
+void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode)
+{
+ ENTRY;
- LDLM_DEBUG(lock, "export %p", exp);
- ldlm_res_lvbo_update(res, NULL, 0, 1);
+ LASSERT(lock->l_granted_mode & (LCK_PW | LCK_EX));
+ LASSERT(new_mode == LCK_COS);
- ldlm_lock_cancel(lock);
- ldlm_reprocess_all(res);
+ 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);
- ldlm_resource_putref(res);
- LDLM_LOCK_PUT(lock);
- spin_lock(&exp->exp_ldlm_data.led_lock);
- }
- spin_unlock(&exp->exp_ldlm_data.led_lock);
+ lock->l_req_mode = new_mode;
+ ldlm_grant_lock(lock, NULL);
+ unlock_res_and_lock(lock);
+ ldlm_reprocess_all(lock->l_resource);
+
+ EXIT;
}
struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode,
/* 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(node, ldlm_interval_slab, CFS_ALLOC_IO, sizeof(*node));
+ OBD_SLAB_ALLOC_PTR_GFP(node, ldlm_interval_slab, CFS_ALLOC_IO);
if (node == NULL) /* Actually, this causes EDEADLOCK to be returned */
RETURN(NULL);
- LASSERTF(new_mode == LCK_PW && lock->l_granted_mode == LCK_PR,
+ LASSERTF((new_mode == LCK_PW && lock->l_granted_mode == LCK_PR),
"new_mode %u, granted %u\n", new_mode, lock->l_granted_mode);
lock_res_and_lock(lock);
res = lock->l_resource;
- ns = res->lr_namespace;
+ ns = ldlm_res_to_ns(res);
old_mode = lock->l_req_mode;
lock->l_req_mode = new_mode;
if (res->lr_type == LDLM_PLAIN || res->lr_type == LDLM_IBITS) {
- /* remember the lock position where the lock might be
- * added back to the granted list later and also
+ /* 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;
} else {
ldlm_resource_unlink_lock(lock);
if (res->lr_type == LDLM_EXTENT) {
- /* FIXME: ugly code, I have to attach the lock to a
+ /* FIXME: ugly code, I have to attach the lock to a
* interval node again since perhaps it will be granted
* soon */
CFS_INIT_LIST_HEAD(&node->li_group);
}
}
+ /*
+ * Remove old lock from the pool before adding the lock with new
+ * mode below in ->policy()
+ */
+ ldlm_pool_del(&ns->ns_pool, lock);
+
/* If this is a local resource, put it on the appropriate list. */
- if (ns_is_client(res->lr_namespace)) {
+ 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 {
ldlm_grant_lock(lock, &rpc_list);
granted = 1;
- /* FIXME: completion handling not with ns_lock held ! */
+ /* FIXME: completion handling not with lr_lock held ! */
if (lock->l_completion_ast)
lock->l_completion_ast(lock, 0, NULL);
}
unlock_res_and_lock(lock);
if (granted)
- ldlm_run_ast_work(&rpc_list, LDLM_WORK_CP_AST);
+ ldlm_run_ast_work(ns, &rpc_list, LDLM_WORK_CP_AST);
if (node)
OBD_SLAB_FREE(node, ldlm_interval_slab, sizeof(*node));
RETURN(res);
}
CDEBUG(level," -- Lock dump: %p/"LPX64" (rc: %d) (pos: %d) (pid: %d)\n",
- lock, lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
+ lock, lock->l_handle.h_cookie, cfs_atomic_read(&lock->l_refc),
pos, lock->l_pid);
if (lock->l_conn_export != NULL)
obd = lock->l_conn_export->exp_obd;
lock->l_resource->lr_name.name[1],
lock->l_resource->lr_name.name[2]);
CDEBUG(level, " Req mode: %s, grant mode: %s, rc: %u, read: %d, "
- "write: %d flags: %#x\n", ldlm_lockname[lock->l_req_mode],
+ "write: %d flags: "LPX64"\n", ldlm_lockname[lock->l_req_mode],
ldlm_lockname[lock->l_granted_mode],
- atomic_read(&lock->l_refc), lock->l_readers, lock->l_writers,
+ cfs_atomic_read(&lock->l_refc), lock->l_readers, lock->l_writers,
lock->l_flags);
if (lock->l_resource->lr_type == LDLM_EXTENT)
CDEBUG(level, " Extent: "LPU64" -> "LPU64
}
void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 level,
- struct libcfs_debug_msg_data *data, const char *fmt,
+ struct libcfs_debug_msg_data *data, const char *fmt,
...)
{
va_list args;
cfs_debug_limit_state_t *cdls = data->msg_cdls;
-
+
va_start(args, fmt);
if (lock->l_resource == NULL) {
- libcfs_debug_vmsg2(cdls, data->msg_subsys, level, data->msg_file,
+ libcfs_debug_vmsg2(cdls, data->msg_subsys, level,data->msg_file,
data->msg_fn, data->msg_line, fmt, args,
" ns: \?\? lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: \?\? rrc=\?\? type: \?\?\? flags: %x remote: "
- LPX64" expref: %d pid: %u\n", lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
+ "res: \?\? rrc=\?\? type: \?\?\? flags: "LPX64" remote: "
+ LPX64" expref: %d pid: %u timeout: %lu\n", lock,
+ lock->l_handle.h_cookie, cfs_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, lock->l_remote_handle.cookie,
lock->l_export ?
- atomic_read(&lock->l_export->exp_refcount) : -99,
- lock->l_pid);
+ cfs_atomic_read(&lock->l_export->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
va_end(args);
return;
}
switch (lock->l_resource->lr_type) {
case LDLM_EXTENT:
- libcfs_debug_vmsg2(cdls, data->msg_subsys, level, data->msg_file,
+ libcfs_debug_vmsg2(cdls, data->msg_subsys, level,data->msg_file,
data->msg_fn, data->msg_line, fmt, args,
" ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
"res: "LPU64"/"LPU64" rrc: %d type: %s ["LPU64"->"LPU64
- "] (req "LPU64"->"LPU64") flags: %x remote: "LPX64
- " expref: %d pid: %u\n",
- lock->l_resource->lr_namespace->ns_name, lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
+ "] (req "LPU64"->"LPU64") flags: "LPX64" remote: "LPX64
+ " expref: %d pid: %u timeout %lu\n",
+ ldlm_lock_to_ns_name(lock), lock,
+ lock->l_handle.h_cookie, cfs_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_resource->lr_name.name[0],
lock->l_resource->lr_name.name[1],
- atomic_read(&lock->l_resource->lr_refcount),
+ cfs_atomic_read(&lock->l_resource->lr_refcount),
ldlm_typename[lock->l_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, lock->l_remote_handle.cookie,
lock->l_export ?
- atomic_read(&lock->l_export->exp_refcount) : -99,
- lock->l_pid);
+ cfs_atomic_read(&lock->l_export->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
break;
case LDLM_FLOCK:
- libcfs_debug_vmsg2(cdls, data->msg_subsys, level, data->msg_file,
+ libcfs_debug_vmsg2(cdls, data->msg_subsys, level,data->msg_file,
data->msg_fn, data->msg_line, fmt, args,
" ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
"res: "LPU64"/"LPU64" rrc: %d type: %s pid: %d "
- "["LPU64"->"LPU64"] flags: %x remote: "LPX64
- " expref: %d pid: %u\n",
- lock->l_resource->lr_namespace->ns_name, lock,
- lock->l_handle.h_cookie, atomic_read(&lock->l_refc),
+ "["LPU64"->"LPU64"] flags: "LPX64" remote: "LPX64
+ " expref: %d pid: %u timeout: %lu\n",
+ ldlm_lock_to_ns_name(lock), lock,
+ lock->l_handle.h_cookie, cfs_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_resource->lr_name.name[0],
lock->l_resource->lr_name.name[1],
- atomic_read(&lock->l_resource->lr_refcount),
+ cfs_atomic_read(&lock->l_resource->lr_refcount),
ldlm_typename[lock->l_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, lock->l_remote_handle.cookie,
lock->l_export ?
- atomic_read(&lock->l_export->exp_refcount) : -99,
- lock->l_pid);
+ cfs_atomic_read(&lock->l_export->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
break;
case LDLM_IBITS:
- libcfs_debug_vmsg2(cdls, data->msg_subsys, level, data->msg_file,
+ libcfs_debug_vmsg2(cdls, data->msg_subsys, level,data->msg_file,
data->msg_fn, data->msg_line, fmt, args,
" ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
"res: "LPU64"/"LPU64" bits "LPX64" rrc: %d type: %s "
- "flags: %x remote: "LPX64" expref: %d "
- "pid %u\n",
- lock->l_resource->lr_namespace->ns_name,
+ "flags: "LPX64" 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),
+ cfs_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_resource->lr_name.name[0],
lock->l_resource->lr_name.name[1],
lock->l_policy_data.l_inodebits.bits,
- atomic_read(&lock->l_resource->lr_refcount),
+ cfs_atomic_read(&lock->l_resource->lr_refcount),
ldlm_typename[lock->l_resource->lr_type],
lock->l_flags, lock->l_remote_handle.cookie,
lock->l_export ?
- atomic_read(&lock->l_export->exp_refcount) : -99,
- lock->l_pid);
+ cfs_atomic_read(&lock->l_export->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
break;
default:
- libcfs_debug_vmsg2(cdls, data->msg_subsys, level, data->msg_file,
+ libcfs_debug_vmsg2(cdls, data->msg_subsys, level,data->msg_file,
data->msg_fn, data->msg_line, fmt, args,
" ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s "
- "res: "LPU64"/"LPU64" rrc: %d type: %s flags: %x "
- "remote: "LPX64" expref: %d pid: %u\n",
- lock->l_resource->lr_namespace->ns_name,
+ "res: "LPU64"/"LPU64" rrc: %d type: %s flags: "LPX64" "
+ "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),
+ cfs_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_resource->lr_name.name[0],
lock->l_resource->lr_name.name[1],
- atomic_read(&lock->l_resource->lr_refcount),
+ cfs_atomic_read(&lock->l_resource->lr_refcount),
ldlm_typename[lock->l_resource->lr_type],
lock->l_flags, lock->l_remote_handle.cookie,
lock->l_export ?
- atomic_read(&lock->l_export->exp_refcount) : -99,
- lock->l_pid);
+ cfs_atomic_read(&lock->l_export->exp_refcount) : -99,
+ lock->l_pid, lock->l_callback_timeout);
break;
}
va_end(args);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff