/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (c) 2002, 2003, 2004 Cluster File Systems, Inc.
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
+ * GPL HEADER START
*
- * This file is part of Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ldlm/ldlm_inodebits.c
+ *
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LDLM
/* Determine if the lock is compatible with all locks on the queue. */
static int
-ldlm_inodebits_compat_queue(struct list_head *queue, struct ldlm_lock *req,
- struct list_head *work_list)
+ldlm_inodebits_compat_queue(cfs_list_t *queue, struct ldlm_lock *req,
+ cfs_list_t *work_list)
{
- struct list_head *tmp, *tmp_tail;
+ cfs_list_t *tmp;
struct ldlm_lock *lock;
ldlm_mode_t req_mode = req->l_req_mode;
__u64 req_bits = req->l_policy_data.l_inodebits.bits;
LASSERT(req_bits); /* There is no sense in lock with no bits set,
I think. Also such a lock would be compatible
with any other bit lock */
- list_for_each(tmp, queue) {
- lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+
+ cfs_list_for_each(tmp, queue) {
+ cfs_list_t *mode_tail;
+
+ lock = cfs_list_entry(tmp, struct ldlm_lock, l_res_link);
if (req == lock)
RETURN(compat);
+ /* last lock in mode group */
+ LASSERT(lock->l_sl_mode.prev != NULL);
+ mode_tail = &cfs_list_entry(lock->l_sl_mode.prev,
+ struct ldlm_lock,
+ l_sl_mode)->l_res_link;
+
/* locks are compatible, bits don't matter */
if (lockmode_compat(lock->l_req_mode, req_mode)) {
- /* jump to next mode group */
- if (LDLM_SL_HEAD(&lock->l_sl_mode))
- tmp = &list_entry(lock->l_sl_mode.next,
- struct ldlm_lock,
- l_sl_mode)->l_res_link;
+ /* jump to last lock in mode group */
+ tmp = mode_tail;
continue;
}
-
- tmp_tail = tmp;
- if (LDLM_SL_HEAD(&lock->l_sl_mode))
- tmp_tail = &list_entry(lock->l_sl_mode.next,
- struct ldlm_lock,
- l_sl_mode)->l_res_link;
+
for (;;) {
+ cfs_list_t *head;
+
+ /* last lock in policy group */
+ tmp = &cfs_list_entry(lock->l_sl_policy.prev,
+ struct ldlm_lock,
+ l_sl_policy)->l_res_link;
+
/* locks with bits overlapped are conflicting locks */
if (lock->l_policy_data.l_inodebits.bits & req_bits) {
+ /* COS lock from the same client is
+ not conflicting */
+ if (lock->l_req_mode == LCK_COS &&
+ lock->l_client_cookie == req->l_client_cookie)
+ goto not_conflicting;
/* conflicting policy */
if (!work_list)
RETURN(0);
compat = 0;
+
+ /* add locks of the policy group to
+ * @work_list as blocking locks for
+ * @req */
if (lock->l_blocking_ast)
- ldlm_add_ast_work_item(lock, req,
+ ldlm_add_ast_work_item(lock, req,
work_list);
- /* add all members of the policy group */
- if (LDLM_SL_HEAD(&lock->l_sl_policy)) {
- do {
- tmp = lock->l_res_link.next;
- lock = list_entry(tmp,
- struct ldlm_lock,
- l_res_link);
- if (lock->l_blocking_ast)
- ldlm_add_ast_work_item(
- lock,
- req,
- work_list);
- } while (!LDLM_SL_TAIL(&lock->l_sl_policy));
- }
- } else if (LDLM_SL_HEAD(&lock->l_sl_policy)) {
- /* jump to next policy group */
- tmp = &list_entry(lock->l_sl_policy.next,
- struct ldlm_lock,
- l_sl_policy)->l_res_link;
+ head = &lock->l_sl_policy;
+ cfs_list_for_each_entry(lock, head, l_sl_policy)
+ if (lock->l_blocking_ast)
+ ldlm_add_ast_work_item(lock, req,
+ work_list);
}
- if (tmp == tmp_tail)
+ not_conflicting:
+ if (tmp == mode_tail)
break;
- else
- tmp = tmp->next;
- lock = list_entry(tmp, struct ldlm_lock, l_res_link);
- } /* for locks in a mode group */
- } /* for each lock in the queue */
+
+ tmp = tmp->next;
+ lock = cfs_list_entry(tmp, struct ldlm_lock,
+ l_res_link);
+ } /* loop over policy groups within one mode group */
+ } /* loop over mode groups within @queue */
RETURN(compat);
}
* - must call this function with the ns lock held once */
int ldlm_process_inodebits_lock(struct ldlm_lock *lock, int *flags,
int first_enq, ldlm_error_t *err,
- struct list_head *work_list)
+ cfs_list_t *work_list)
{
struct ldlm_resource *res = lock->l_resource;
CFS_LIST_HEAD(rpc_list);
int rc;
ENTRY;
- LASSERT(list_empty(&res->lr_converting));
+ LASSERT(cfs_list_empty(&res->lr_converting));
check_res_locked(res);
if (!first_enq) {
* 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))
+ if (cfs_list_empty(&lock->l_res_link))
ldlm_resource_add_lock(res, &res->lr_waiting, lock);
unlock_res(res);
rc = ldlm_run_ast_work(&rpc_list, LDLM_WORK_BL_AST);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff