LU-884 clio: client in memory checksum

[fs/lustre-release.git] / lustre / obdclass / mea.c

diff --git a/lustre/obdclass/mea.c b/lustre/obdclass/mea.c
index 8dffec3..ac85dad 100644 (file)
--- a/lustre/obdclass/mea.c
+++ b/lustre/obdclass/mea.c
@@ -1,43 +1,57 @@
 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
  * vim:expandtab:shiftwidth=8:tabstop=8:
  *
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ * 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.
  */
 
 #define DEBUG_SUBSYSTEM S_CLASS
+#include <obd_class.h>
 #ifdef __KERNEL__
 #include <linux/kmod.h>   /* for request_module() */
 #include <linux/module.h>
-#include <linux/obd_class.h>
-#include <linux/random.h>
 #include <linux/slab.h>
 #include <linux/pagemap.h>
-#else 
+#else
 #include <liblustre.h>
-#include <linux/obd_class.h>
-#include <linux/obd.h>
+#include <obd.h>
 #endif
-#include <linux/lprocfs_status.h>
+#include <lprocfs_status.h>
+#include <lustre/lustre_idl.h>
 
 static int mea_last_char_hash(int count, char *name, int namelen)
 {
         unsigned int c;
-        
+
         c = name[namelen - 1];
         if (c == 0)
                 CWARN("looks like wrong len is passed\n");
@@ -65,31 +79,30 @@ int raw_name2idx(int hashtype, int count, const char *name, int namelen)
 
         switch (hashtype) {
                 case MEA_MAGIC_LAST_CHAR:
-                        c = mea_last_char_hash(count, (char *) name, namelen);
+                        c = mea_last_char_hash(count, (char *)name, namelen);
                         break;
                 case MEA_MAGIC_ALL_CHARS:
-                        c = mea_all_chars_hash(count, (char *) name, namelen);
+                        c = mea_all_chars_hash(count, (char *)name, namelen);
+                        break;
+                case MEA_MAGIC_HASH_SEGMENT:
+                        CERROR("Unsupported hash type MEA_MAGIC_HASH_SEGMENT\n");
                         break;
                 default:
-                        CERROR("unknown hash type 0x%x\n", hashtype);
+                        CERROR("Unknown hash type 0x%x\n", hashtype);
         }
-       
+
+        LASSERT(c < count);
         return c;
 }
 
-int mea_name2idx(struct mea *mea, char *name, int namelen)
+int mea_name2idx(struct lmv_stripe_md *mea, const char *name, int namelen)
 {
         unsigned int c;
 
-       /* just to simplify caller code */
-               if (mea == NULL)
-               return 0;
-
-        if (mea->mea_count == 0)
-                return 0;
+        LASSERT(mea && mea->mea_count);
 
        c = raw_name2idx(mea->mea_magic, mea->mea_count, name, namelen);
-       LASSERT(c < mea->mea_count);
+
+        LASSERT(c < mea->mea_count);
         return c;
 }
-