/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (c) 2002, 2003 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) 2003, 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/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ldlm/ldlm_plain.c
+ *
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LDLM
#ifdef __KERNEL__
-#include <linux/lustre_dlm.h>
-#include <linux/obd_support.h>
-#include <linux/lustre_lib.h>
+#include <lustre_dlm.h>
+#include <obd_support.h>
+#include <lustre_lib.h>
#else
#include <liblustre.h>
#endif
#include "ldlm_internal.h"
+#ifdef HAVE_SERVER_SUPPORT
static inline int
-ldlm_plain_compat_queue(struct list_head *queue, struct ldlm_lock *req,
- int send_cbs)
+ldlm_plain_compat_queue(cfs_list_t *queue, struct ldlm_lock *req,
+ cfs_list_t *work_list)
{
- struct list_head *tmp;
+ cfs_list_t *tmp;
struct ldlm_lock *lock;
ldlm_mode_t req_mode = req->l_req_mode;
int compat = 1;
lockmode_verify(req_mode);
- 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);
if (req == lock)
RETURN(compat);
- if (lockmode_compat(lock->l_req_mode, req_mode))
+ /* last lock in mode group */
+ tmp = &cfs_list_entry(lock->l_sl_mode.prev,
+ struct ldlm_lock,
+ l_sl_mode)->l_res_link;
+
+ if (lockmode_compat(lock->l_req_mode, req_mode))
continue;
- if (!send_cbs)
+ if (!work_list)
RETURN(0);
compat = 0;
+
+ /* add locks of the mode group to @work_list as
+ * blocking locks for @req */
if (lock->l_blocking_ast)
- ldlm_add_ast_work_item(lock, req, NULL, 0);
+ ldlm_add_ast_work_item(lock, req, work_list);
+
+ {
+ cfs_list_t *head;
+
+ head = &lock->l_sl_mode;
+ cfs_list_for_each_entry(lock, head, l_sl_mode)
+ if (lock->l_blocking_ast)
+ ldlm_add_ast_work_item(lock, req,
+ work_list);
+ }
}
RETURN(compat);
/* If first_enq is 0 (ie, called from ldlm_reprocess_queue):
* - blocking ASTs have already been sent
- * - the caller has already initialized req->lr_tmp
- * - must call this function with the ns lock held
+ * - must call this function with the resource lock held
*
* If first_enq is 1 (ie, called from ldlm_lock_enqueue):
* - blocking ASTs have not been sent
- * - the caller has NOT initialized req->lr_tmp, so we must
- * - must call this function with the ns lock held once */
+ * - must call this function with the resource lock held */
int ldlm_process_plain_lock(struct ldlm_lock *lock, int *flags, int first_enq,
- ldlm_error_t *err)
+ ldlm_error_t *err, cfs_list_t *work_list)
{
struct ldlm_resource *res = lock->l_resource;
- struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
+ CFS_LIST_HEAD(rpc_list);
int rc;
ENTRY;
- LASSERT(list_empty(&res->lr_converting));
+ check_res_locked(res);
+ LASSERT(cfs_list_empty(&res->lr_converting));
if (!first_enq) {
- LASSERT(res->lr_tmp != NULL);
- rc = ldlm_plain_compat_queue(&res->lr_granted, lock, 0);
+ LASSERT(work_list != NULL);
+ rc = ldlm_plain_compat_queue(&res->lr_granted, lock, NULL);
if (!rc)
RETURN(LDLM_ITER_STOP);
- rc = ldlm_plain_compat_queue(&res->lr_waiting, lock, 0);
+ rc = ldlm_plain_compat_queue(&res->lr_waiting, lock, NULL);
if (!rc)
RETURN(LDLM_ITER_STOP);
ldlm_resource_unlink_lock(lock);
- ldlm_grant_lock(lock, NULL, 0, 1);
+ ldlm_grant_lock(lock, work_list);
RETURN(LDLM_ITER_CONTINUE);
}
restart:
- LASSERT(res->lr_tmp == NULL);
- res->lr_tmp = &rpc_list;
- rc = ldlm_plain_compat_queue(&res->lr_granted, lock, 1);
- rc += ldlm_plain_compat_queue(&res->lr_waiting, lock, 1);
- res->lr_tmp = NULL;
+ rc = ldlm_plain_compat_queue(&res->lr_granted, lock, &rpc_list);
+ rc += ldlm_plain_compat_queue(&res->lr_waiting, lock, &rpc_list);
if (rc != 2) {
/* If either of the compat_queue()s returned 0, then we
* 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);
- l_unlock(&res->lr_namespace->ns_lock);
- rc = ldlm_run_ast_work(res->lr_namespace, &rpc_list);
- l_lock(&res->lr_namespace->ns_lock);
+ unlock_res(res);
+ rc = ldlm_run_ast_work(ldlm_res_to_ns(res), &rpc_list,
+ LDLM_WORK_BL_AST);
+ lock_res(res);
if (rc == -ERESTART)
GOTO(restart, -ERESTART);
*flags |= LDLM_FL_BLOCK_GRANTED;
} else {
ldlm_resource_unlink_lock(lock);
- ldlm_grant_lock(lock, NULL, 0, 0);
+ ldlm_grant_lock(lock, NULL);
}
RETURN(0);
}
+#endif /* HAVE_SERVER_SUPPORT */
+
+void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
+ ldlm_policy_data_t *lpolicy)
+{
+ /* No policy for plain locks */
+}
+
+void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
+ ldlm_wire_policy_data_t *wpolicy)
+{
+ /* No policy for plain locks */
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff