Branch HEAD

[fs/lustre-release.git] / lustre / ldlm / ldlm_extent.c

diff --git a/lustre/ldlm/ldlm_extent.c b/lustre/ldlm/ldlm_extent.c
index 2e6aa1a..1541416 100644 (file)
--- a/lustre/ldlm/ldlm_extent.c
+++ b/lustre/ldlm/ldlm_extent.c
@@ -1,27 +1,42 @@
 /* -*- 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 the Lustre file system, http://www.lustre.org
- *   Lustre is a trademark of Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- *   You may have signed or agreed to another license before downloading
- *   this software.  If so, you are bound by the terms and conditions
- *   of that agreement, and the following does not apply to you.  See the
- *   LICENSE file included with this distribution for more information.
+ * 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.
  *
- *   If you did not agree to a different license, then this copy of Lustre
- *   is open source 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 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).
  *
- *   In either case, 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
- *   license text for more details.
+ * 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  2008 Sun Microsystems, Inc. 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_extent.c
+ *
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Phil Schwan <phil@clusterfs.com>
  */
 
 #define DEBUG_SUBSYSTEM S_LDLM
@@ -29,7 +44,6 @@
 # include <liblustre.h>
 #else
 # include <libcfs/libcfs.h>
-# include <libcfs/kp30.h>
 #endif
 
 #include <lustre_dlm.h>
@@ -120,7 +134,9 @@ static void ldlm_extent_internal_policy_granted(struct ldlm_lock *req,
                         limiter.start = req_start;
 
                 if (interval_is_overlapped(tree->lit_root, &ext))
-                        printk("req_mode = %d, tree->lit_mode = %d, tree->lit_size = %d\n",
+                        CDEBUG(D_INFO, 
+                               "req_mode = %d, tree->lit_mode = %d, "
+                               "tree->lit_size = %d\n",
                                req_mode, tree->lit_mode, tree->lit_size);
                 interval_expand(tree->lit_root, &ext, &limiter);
                 limiter.start = max(limiter.start, ext.start);
@@ -200,7 +216,7 @@ ldlm_extent_internal_policy_waiting(struct ldlm_lock *req,
                         continue;
 
                 /* We grow extents downwards only as far as they don't overlap
-                 * with already-granted locks, on the assumtion that clients
+                 * with already-granted locks, on the assumption that clients
                  * will be writing beyond the initial requested end and would
                  * then need to enqueue a new lock beyond previous request.
                  * l_req_extent->end strictly < req_start, checked above. */
@@ -268,6 +284,9 @@ static int ldlm_check_contention(struct ldlm_lock *lock, int contended_locks)
         struct ldlm_resource *res = lock->l_resource;
         cfs_time_t now = cfs_time_current();
 
+        if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_SET_CONTENTION))
+                return 1;
+
         CDEBUG(D_DLMTRACE, "contended locks = %d\n", contended_locks);
         if (contended_locks > res->lr_namespace->ns_contended_locks)
                 res->lr_contention_time = now;
@@ -604,9 +623,9 @@ static void discard_bl_list(struct list_head *bl_list)
                 lock->l_flags &= ~LDLM_FL_AST_SENT;
                 LASSERT(lock->l_bl_ast_run == 0);
                 LASSERT(lock->l_blocking_lock);
-                LDLM_LOCK_PUT(lock->l_blocking_lock);
+                LDLM_LOCK_RELEASE(lock->l_blocking_lock);
                 lock->l_blocking_lock = NULL;
-                LDLM_LOCK_PUT(lock);
+                LDLM_LOCK_RELEASE(lock);
         }
         EXIT;
 }
@@ -622,7 +641,7 @@ int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
                              ldlm_error_t *err, struct list_head *work_list)
 {
         struct ldlm_resource *res = lock->l_resource;
-        struct list_head rpc_list = CFS_LIST_HEAD_INIT(rpc_list);
+        CFS_LIST_HEAD(rpc_list);
         int rc, rc2;
         int contended_locks = 0;
         ENTRY;