* the waiting_locks_list and ldlm_add_waiting_lock()
* already grabbed a ref
*/
- list_del(&lock->l_pending_chain);
- list_add(&lock->l_pending_chain, &expired_lock_list);
+ list_move(&lock->l_pending_chain, &expired_lock_list);
need_dump = 1;
}
&lock->l_policy_data);
if (dlm_req->lock_desc.l_resource.lr_type == LDLM_EXTENT)
lock->l_req_extent = lock->l_policy_data.l_extent;
+ else if (dlm_req->lock_desc.l_resource.lr_type == LDLM_IBITS)
+ lock->l_policy_data.l_inodebits.try_bits =
+ dlm_req->lock_desc.l_policy_data.l_inodebits.try_bits;
existing_lock:
cookie = req;
struct obd_export *exp = req->rq_export;
struct ldlm_reply *dlm_rep;
struct ldlm_lock *lock;
+ __u64 bits;
+ __u64 new_bits;
int rc;
ENTRY;
dlm_rep->lock_flags = dlm_req->lock_flags;
lock = ldlm_handle2lock(&dlm_req->lock_handle[0]);
- if (lock) {
- __u64 bits;
- __u64 new;
+ if (!lock) {
+ LDLM_DEBUG_NOLOCK("server lock is canceled already");
+ req->rq_status = ELDLM_NO_LOCK_DATA;
+ RETURN(0);
+ }
- bits = lock->l_policy_data.l_inodebits.bits;
- new = dlm_req->lock_desc.l_policy_data.l_inodebits.bits;
- LDLM_DEBUG(lock, "server-side convert handler START");
+ LDLM_DEBUG(lock, "server-side convert handler START");
- if (ldlm_is_cancel(lock)) {
- LDLM_ERROR(lock, "convert on canceled lock!");
- rc = ELDLM_NO_LOCK_DATA;
- } else if (dlm_req->lock_desc.l_req_mode !=
- lock->l_granted_mode) {
- LDLM_ERROR(lock, "lock mode differs!");
- rc = ELDLM_NO_LOCK_DATA;
- } else if (bits == new) {
- /*
- * This can be valid situation if CONVERT RPCs are
- * re-ordered. Just finish silently
- */
- LDLM_DEBUG(lock, "lock is converted already!");
- rc = ELDLM_OK;
- } else {
- lock_res_and_lock(lock);
- if (ldlm_is_waited(lock))
- ldlm_del_waiting_lock(lock);
+ lock_res_and_lock(lock);
+ bits = lock->l_policy_data.l_inodebits.bits;
+ new_bits = dlm_req->lock_desc.l_policy_data.l_inodebits.bits;
- ldlm_clear_cbpending(lock);
- lock->l_policy_data.l_inodebits.cancel_bits = 0;
- ldlm_inodebits_drop(lock, bits & ~new);
+ if (ldlm_is_cancel(lock)) {
+ LDLM_DEBUG(lock, "convert on canceled lock!");
+ unlock_res_and_lock(lock);
+ GOTO(out_put, rc = ELDLM_NO_LOCK_DATA);
+ }
- ldlm_clear_blocking_data(lock);
- unlock_res_and_lock(lock);
+ if (dlm_req->lock_desc.l_req_mode != lock->l_granted_mode) {
+ LDLM_ERROR(lock, "lock mode differs!");
+ unlock_res_and_lock(lock);
+ GOTO(out_put, rc = -EPROTO);
+ }
- ldlm_reprocess_all(lock->l_resource, NULL);
- rc = ELDLM_OK;
- }
+ if (bits == new_bits) {
+ /*
+ * This can be valid situation if CONVERT RPCs are
+ * re-ordered. Just finish silently
+ */
+ LDLM_DEBUG(lock, "lock is converted already!");
+ unlock_res_and_lock(lock);
+ } else {
+ if (ldlm_is_waited(lock))
+ ldlm_del_waiting_lock(lock);
- if (rc == ELDLM_OK) {
- dlm_rep->lock_handle = lock->l_remote_handle;
- ldlm_ibits_policy_local_to_wire(&lock->l_policy_data,
- &dlm_rep->lock_desc.l_policy_data);
- }
+ ldlm_clear_cbpending(lock);
+ lock->l_policy_data.l_inodebits.cancel_bits = 0;
+ ldlm_inodebits_drop(lock, bits & ~new_bits);
- LDLM_DEBUG(lock, "server-side convert handler END, rc = %d",
- rc);
- LDLM_LOCK_PUT(lock);
- } else {
- rc = ELDLM_NO_LOCK_DATA;
- LDLM_DEBUG_NOLOCK("server-side convert handler END, rc = %d",
- rc);
+ ldlm_clear_blocking_data(lock);
+ unlock_res_and_lock(lock);
+
+ ldlm_reprocess_all(lock->l_resource, NULL);
}
+ dlm_rep->lock_handle = lock->l_remote_handle;
+ ldlm_ibits_policy_local_to_wire(&lock->l_policy_data,
+ &dlm_rep->lock_desc.l_policy_data);
+ rc = ELDLM_OK;
+ EXIT;
+out_put:
+ LDLM_DEBUG(lock, "server-side convert handler END, rc = %d", rc);
+ LDLM_LOCK_PUT(lock);
req->rq_status = rc;
-
- RETURN(0);
+ return 0;
}
/**
#endif /* HAVE_SERVER_SUPPORT */
/**
- * Callback handler for receiving incoming blocking ASTs.
- *
- * This can only happen on client side.
+ * Server may pass additional information about blocking lock.
+ * For IBITS locks it is conflicting bits which can be used for
+ * lock convert instead of cancel.
*/
-void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
- struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
+void ldlm_bl_desc2lock(const struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
{
- int do_ast;
-
- ENTRY;
-
- LDLM_DEBUG(lock, "client blocking AST callback handler");
+ struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
- lock_res_and_lock(lock);
-
- /* set bits to cancel for this lock for possible lock convert */
- if (ns_is_client(ns) && (lock->l_resource->lr_type == LDLM_IBITS)) {
+ check_res_locked(lock->l_resource);
+ if (ns_is_client(ns) && ld &&
+ (lock->l_resource->lr_type == LDLM_IBITS)) {
/*
* Lock description contains policy of blocking lock,
* and its cancel_bits is used to pass conflicting bits.
* never use cancel bits from different resource, full cancel
* is to be used.
*/
- if (ld && ld->l_policy_data.l_inodebits.bits &&
+ if (ld->l_policy_data.l_inodebits.cancel_bits &&
ldlm_res_eq(&ld->l_resource.lr_name,
- &lock->l_resource->lr_name))
- lock->l_policy_data.l_inodebits.cancel_bits =
+ &lock->l_resource->lr_name) &&
+ !(ldlm_is_cbpending(lock) &&
+ lock->l_policy_data.l_inodebits.cancel_bits == 0)) {
+ /* always combine conflicting ibits */
+ lock->l_policy_data.l_inodebits.cancel_bits |=
ld->l_policy_data.l_inodebits.cancel_bits;
- /*
- * if there is no valid ld and lock is cbpending already
- * then cancel_bits should be kept, otherwise it is zeroed.
- */
- else if (!ldlm_is_cbpending(lock))
+ } else {
+ /* If cancel_bits are not obtained or
+ * if the lock is already CBPENDING and
+ * has no cancel_bits set
+ * - the full lock is to be cancelled
+ */
lock->l_policy_data.l_inodebits.cancel_bits = 0;
+ }
}
+}
+
+/**
+ * Callback handler for receiving incoming blocking ASTs.
+ *
+ * This can only happen on client side.
+ */
+void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
+ struct ldlm_lock_desc *ld, struct ldlm_lock *lock)
+{
+ int do_ast;
+
+ ENTRY;
+
+ LDLM_DEBUG(lock, "client blocking AST callback handler");
+
+ lock_res_and_lock(lock);
+
+ /* get extra information from desc if any */
+ ldlm_bl_desc2lock(ld, lock);
ldlm_set_cbpending(lock);
do_ast = (!lock->l_readers && !lock->l_writers);
EXIT;
}
+static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
+{
+ if (req->rq_no_reply)
+ return 0;
+
+ req->rq_status = rc;
+ if (!req->rq_packed_final) {
+ rc = lustre_pack_reply(req, 1, NULL, NULL);
+ if (rc)
+ return rc;
+ }
+ return ptlrpc_reply(req);
+}
+
/**
* Callback handler for receiving incoming completion ASTs.
*
* This only can happen on client side.
*/
-static void ldlm_handle_cp_callback(struct ptlrpc_request *req,
- struct ldlm_namespace *ns,
- struct ldlm_request *dlm_req,
- struct ldlm_lock *lock)
+static int ldlm_handle_cp_callback(struct ptlrpc_request *req,
+ struct ldlm_namespace *ns,
+ struct ldlm_request *dlm_req,
+ struct ldlm_lock *lock)
{
- struct list_head ast_list;
+ LIST_HEAD(ast_list);
int lvb_len;
int rc = 0;
LDLM_DEBUG(lock, "client completion callback handler START");
- INIT_LIST_HEAD(&ast_list);
if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE)) {
long to = cfs_time_seconds(1);
+ ldlm_callback_reply(req, 0);
+
while (to > 0) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(to);
+ schedule_timeout_interruptible(to);
if (ldlm_is_granted(lock) ||
ldlm_is_destroyed(lock))
break;
lock_res_and_lock(lock);
}
+ if (ldlm_is_failed(lock)) {
+ unlock_res_and_lock(lock);
+ LDLM_LOCK_RELEASE(lock);
+ RETURN(-EINVAL);
+ }
+
if (ldlm_is_destroyed(lock) ||
ldlm_is_granted(lock)) {
/* b=11300: the lock has already been granted */
* Let ldlm_cancel_lru() be fast.
*/
ldlm_lock_remove_from_lru(lock);
+ ldlm_bl_desc2lock(&dlm_req->lock_desc, lock);
lock->l_flags |= LDLM_FL_CBPENDING | LDLM_FL_BL_AST;
LDLM_DEBUG(lock, "completion AST includes blocking AST");
}
wake_up(&lock->l_waitq);
}
LDLM_LOCK_RELEASE(lock);
+
+ return 0;
}
/**
struct ldlm_request *dlm_req,
struct ldlm_lock *lock)
{
+ struct ldlm_lock_desc *ld = &dlm_req->lock_desc;
int rc = -ENOSYS;
ENTRY;
ktime_add(lock->l_last_used,
ktime_set(ns->ns_dirty_age_limit, 0)))) {
unlock_res_and_lock(lock);
- if (ldlm_bl_to_thread_lock(ns, NULL, lock))
- ldlm_handle_bl_callback(ns, NULL, lock);
+
+ /* For MDS glimpse it is always DOM lock, set corresponding
+ * cancel_bits to perform lock convert if needed
+ */
+ if (lock->l_resource->lr_type == LDLM_IBITS)
+ ld->l_policy_data.l_inodebits.cancel_bits =
+ MDS_INODELOCK_DOM;
+ if (ldlm_bl_to_thread_lock(ns, ld, lock))
+ ldlm_handle_bl_callback(ns, ld, lock);
EXIT;
return;
EXIT;
}
-static int ldlm_callback_reply(struct ptlrpc_request *req, int rc)
-{
- if (req->rq_no_reply)
- return 0;
-
- req->rq_status = rc;
- if (!req->rq_packed_final) {
- rc = lustre_pack_reply(req, 1, NULL, NULL);
- if (rc)
- return rc;
- }
- return ptlrpc_reply(req);
-}
-
static int __ldlm_bl_to_thread(struct ldlm_bl_work_item *blwi,
enum ldlm_cancel_flags cancel_flags)
{
case LDLM_CP_CALLBACK:
CDEBUG(D_INODE, "completion ast\n");
req_capsule_extend(&req->rq_pill, &RQF_LDLM_CP_CALLBACK);
- ldlm_callback_reply(req, 0);
- ldlm_handle_cp_callback(req, ns, dlm_req, lock);
+ rc = ldlm_handle_cp_callback(req, ns, dlm_req, lock);
+ if (!OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_BL_CB_RACE))
+ ldlm_callback_reply(req, rc);
break;
case LDLM_GL_CALLBACK:
CDEBUG(D_INODE, "glimpse ast\n");
void ldlm_revoke_export_locks(struct obd_export *exp)
{
- struct list_head rpc_list;
+ LIST_HEAD(rpc_list);
ENTRY;
- INIT_LIST_HEAD(&rpc_list);
cfs_hash_for_each_nolock(exp->exp_lock_hash,
ldlm_revoke_lock_cb, &rpc_list, 0);
ldlm_run_ast_work(exp->exp_obd->obd_namespace, &rpc_list,
git://git.whamcloud.com / fs / lustre-release.git / blobdiff