-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * 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.
*
- * 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 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).
*
- * 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.
+ * 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
*
- * 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.
+ * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_LOV
#ifdef __KERNEL__
obd_size lov_stripe_size(struct lov_stripe_md *lsm, obd_size ost_size,
int stripeno)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- unsigned long swidth, stripe_size;
- int sindex = stripeno;
+ unsigned long ssize = lsm->lsm_stripe_size;
+ unsigned long stripe_size;
+ obd_off swidth;
obd_size lov_size;
int magic = lsm->lsm_magic;
ENTRY;
LASSERT(lsm_op_find(magic) != NULL);
lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, NULL, &swidth);
-
- /* do_div(a, b) returns a % b, and a = a / b */
- stripe_size = do_div(ost_size, ssize);
- if (stripe_size)
- lov_size = ost_size * swidth + stripeno * ssize + stripe_size;
- else
- lov_size = (ost_size - 1) * swidth + (stripeno + 1) * ssize;
-
- lov_size += lsm_op_find(magic)->lsm_stripe_offset_by_index(lsm, sindex);
+
+ /* lov_do_div64(a, b) returns a % b, and a = a / b */
+ stripe_size = lov_do_div64(ost_size, ssize);
+ if (stripe_size)
+ lov_size = ost_size * swidth + stripeno * ssize + stripe_size;
+ else
+ lov_size = (ost_size - 1) * swidth + (stripeno + 1) * ssize;
+
RETURN(lov_size);
}
* falls in the stripe and no shifting was done; > 0 when the offset
* was outside the stripe and was pulled back to its final byte. */
int lov_stripe_offset(struct lov_stripe_md *lsm, obd_off lov_off,
- int stripeno, obd_off *obd_off)
+ int stripeno, obd_off *obdoff)
{
unsigned long ssize = lsm->lsm_stripe_size;
- unsigned long swidth, stripe_off, this_stripe;
- uint64_t l_off, s_off;
+ obd_off stripe_off, this_stripe, swidth;
int magic = lsm->lsm_magic;
int ret = 0;
if (lov_off == OBD_OBJECT_EOF) {
- *obd_off = OBD_OBJECT_EOF;
+ *obdoff = OBD_OBJECT_EOF;
return 0;
}
LASSERT(lsm_op_find(magic) != NULL);
- /*It will check whether the lov_off and stripeno
- *are in the same extent.
- *1) lov_off extent < stripeno extent, ret = -1, obd_off = 0
- *2) lov_off extent > stripeno extent, ret = 1,
- * obd_off = lov_off extent offset*/
- l_off = lsm_op_find(magic)->lsm_stripe_offset_by_index(lsm, stripeno);
- s_off = lsm_op_find(magic)->lsm_stripe_offset_by_offset(lsm, lov_off);
- if (s_off < l_off) {
- ret = -1;
- *obd_off = 0;
- return ret;
- } else if (s_off > l_off) {
- ret = 1;
- *obd_off = s_off;
- return ret;
- }
- /*If they are in the same extent, original logic*/
+
lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &lov_off,
&swidth);
-
- /* do_div(a, b) returns a % b, and a = a / b */
- stripe_off = do_div(lov_off, swidth);
- this_stripe = stripeno * ssize;
+ /* lov_do_div64(a, b) returns a % b, and a = a / b */
+ stripe_off = lov_do_div64(lov_off, swidth);
+
+ this_stripe = (obd_off)stripeno * ssize;
if (stripe_off < this_stripe) {
stripe_off = 0;
ret = -1;
}
}
- *obd_off = lov_off * ssize + stripe_off;
+ *obdoff = lov_off * ssize + stripe_off;
return ret;
}
int stripeno)
{
unsigned long ssize = lsm->lsm_stripe_size;
- unsigned long swidth, stripe_off, this_stripe;
+ obd_off stripe_off, this_stripe, swidth;
int magic = lsm->lsm_magic;
if (file_size == OBD_OBJECT_EOF)
lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &file_size,
&swidth);
- /* do_div(a, b) returns a % b, and a = a / b */
- stripe_off = do_div(file_size, swidth);
+ /* lov_do_div64(a, b) returns a % b, and a = a / b */
+ stripe_off = lov_do_div64(file_size, swidth);
- this_stripe = stripeno * ssize;
+ this_stripe = (obd_off)stripeno * ssize;
if (stripe_off < this_stripe) {
/* Move to end of previous stripe, or zero */
if (file_size > 0) {
/* compute which stripe number "lov_off" will be written into */
int lov_stripe_number(struct lov_stripe_md *lsm, obd_off lov_off)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- unsigned long swidth, stripe_off;
- obd_off offset = lov_off;
- int magic = lsm->lsm_magic;
+ unsigned long ssize = lsm->lsm_stripe_size;
+ obd_off stripe_off, swidth;
+ int magic = lsm->lsm_magic;
- LASSERT(lsm_op_find(magic) != NULL);
- lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
+ LASSERT(lsm_op_find(magic) != NULL);
+ lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
+
+ stripe_off = lov_do_div64(lov_off, swidth);
- stripe_off = do_div(lov_off, swidth);
+ /* Puts stripe_off/ssize result into stripe_off */
+ lov_do_div64(stripe_off, ssize);
- return (stripe_off/ssize +
- lsm_op_find(magic)->lsm_stripe_index_by_offset(lsm, offset));
+ return stripe_off;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff