+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * 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.
- *
- * 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
- * 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 "../include/obd_class.h"
-#include <linux/kmod.h> /* for request_module() */
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/pagemap.h>
-#include "../include/lprocfs_status.h"
-#include "../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");
- c = c % count;
- return c;
-}
-
-static int mea_all_chars_hash(int count, char *name, int namelen)
-{
- unsigned int c = 0;
-
- while (--namelen >= 0)
- c += name[namelen];
- c = c % count;
- return c;
-}
-
-int raw_name2idx(int hashtype, int count, const char *name, int namelen)
-{
- unsigned int c = 0;
- int idx;
-
- LASSERT(namelen > 0);
-
- if (filename_is_volatile(name, namelen, &idx)) {
- if ((idx >= 0) && (idx < count))
- return idx;
- goto hashchoice;
- }
-
- if (count <= 1)
- return 0;
-
-hashchoice:
- switch (hashtype) {
- case MEA_MAGIC_LAST_CHAR:
- c = mea_last_char_hash(count, (char *)name, namelen);
- break;
- case MEA_MAGIC_ALL_CHARS:
- 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);
- }
-
- LASSERT(c < count);
- return c;
-}
-EXPORT_SYMBOL(raw_name2idx);
-
-int mea_name2idx(struct lmv_stripe_md *mea, const char *name, int namelen)
-{
- unsigned int c;
-
- LASSERT(mea && mea->mea_count);
-
- c = raw_name2idx(mea->mea_magic, mea->mea_count, name, namelen);
-
- LASSERT(c < mea->mea_count);
- return c;
-}
-EXPORT_SYMBOL(mea_name2idx);