-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2015, 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__
#include <libcfs/libcfs.h>
-#else
-#include <liblustre.h>
-#endif
#include <obd_class.h>
-#include <obd_lov.h>
#include "lov_internal.h"
+static loff_t stripe_width(struct lov_stripe_md *lsm, unsigned int index)
+{
+ struct lov_stripe_md_entry *entry = lsm->lsm_entries[index];
+
+ LASSERT(index < lsm->lsm_entry_count);
+
+ return (loff_t)entry->lsme_stripe_size * entry->lsme_stripe_count;
+}
+
/* compute object size given "stripeno" and the ost size */
-obd_size lov_stripe_size(struct lov_stripe_md *lsm, obd_size ost_size,
- int stripeno)
+u64 lov_stripe_size(struct lov_stripe_md *lsm, int index, u64 ost_size,
+ int stripeno)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- unsigned long stripe_size;
- obd_off swidth;
- obd_size lov_size;
- int magic = lsm->lsm_magic;
+ unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
+ unsigned long stripe_size;
+ loff_t swidth;
+ loff_t lov_size;
ENTRY;
if (ost_size == 0)
RETURN(0);
- 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;
+ swidth = stripe_width(lsm, index);
+
+ /* 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);
}
+/**
+ * Compute file level page index by stripe level page offset
+ */
+pgoff_t lov_stripe_pgoff(struct lov_stripe_md *lsm, int index,
+ pgoff_t stripe_index, int stripe)
+{
+ loff_t offset;
+
+ offset = lov_stripe_size(lsm, index,
+ (stripe_index << PAGE_SHIFT) + 1,
+ stripe);
+ return offset >> PAGE_SHIFT;
+}
+
/* we have an offset in file backed by an lov and want to find out where
* that offset lands in our given stripe of the file. for the easy
* case where the offset is within the stripe, we just have to scale the
* was moved forward to the start of the stripe in question; 0 when it
* 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 *obdoff)
+int lov_stripe_offset(struct lov_stripe_md *lsm, int index, loff_t lov_off,
+ int stripeno, loff_t *obdoff)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- obd_off stripe_off, this_stripe, swidth;
- int magic = lsm->lsm_magic;
+ unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
+ loff_t stripe_off;
+ loff_t this_stripe;
+ loff_t swidth;
int ret = 0;
if (lov_off == OBD_OBJECT_EOF) {
return 0;
}
- LASSERT(lsm_op_find(magic) != NULL);
+ swidth = stripe_width(lsm, index);
- lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &lov_off,
- &swidth);
-
- /* ll_do_div64(a, b) returns a % b, and a = a / b */
- stripe_off = ll_do_div64(lov_off, swidth);
+ /* 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;
+ this_stripe = (loff_t)stripeno * ssize;
if (stripe_off < this_stripe) {
stripe_off = 0;
ret = -1;
* | 0 | 1 | 2 | 0 | 1 | 2 |
* ---------------------------------------------------------------------
*/
-obd_off lov_size_to_stripe(struct lov_stripe_md *lsm, obd_off file_size,
- int stripeno)
+loff_t lov_size_to_stripe(struct lov_stripe_md *lsm, int index, u64 file_size,
+ int stripeno)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- obd_off stripe_off, this_stripe, swidth;
- int magic = lsm->lsm_magic;
+ unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
+ loff_t stripe_off;
+ loff_t this_stripe;
+ loff_t swidth;
if (file_size == OBD_OBJECT_EOF)
return OBD_OBJECT_EOF;
- LASSERT(lsm_op_find(magic) != NULL);
- lsm_op_find(magic)->lsm_stripe_by_index(lsm, &stripeno, &file_size,
- &swidth);
+ swidth = stripe_width(lsm, index);
- /* ll_do_div64(a, b) returns a % b, and a = a / b */
- stripe_off = ll_do_div64(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 = (obd_off)stripeno * ssize;
+ this_stripe = (loff_t)stripeno * ssize;
if (stripe_off < this_stripe) {
/* Move to end of previous stripe, or zero */
if (file_size > 0) {
/* given an extent in an lov and a stripe, calculate the extent of the stripe
* that is contained within the lov extent. this returns true if the given
* stripe does intersect with the lov extent. */
-int lov_stripe_intersects(struct lov_stripe_md *lsm, int stripeno,
- obd_off start, obd_off end,
- obd_off *obd_start, obd_off *obd_end)
+int lov_stripe_intersects(struct lov_stripe_md *lsm, int index, int stripeno,
+ struct lu_extent *ext, u64 *obd_start, u64 *obd_end)
{
+ struct lov_stripe_md_entry *entry = lsm->lsm_entries[index];
+ u64 start, end;
int start_side, end_side;
- start_side = lov_stripe_offset(lsm, start, stripeno, obd_start);
- end_side = lov_stripe_offset(lsm, end, stripeno, obd_end);
+ if (!lu_extent_is_overlapped(ext, &entry->lsme_extent))
+ return 0;
+
+ start = max_t(__u64, ext->e_start, entry->lsme_extent.e_start);
+ end = min_t(__u64, ext->e_end, entry->lsme_extent.e_end);
+ if (end != OBD_OBJECT_EOF)
+ end--;
+
+ start_side = lov_stripe_offset(lsm, index, start, stripeno, obd_start);
+ end_side = lov_stripe_offset(lsm, index, end, stripeno, obd_end);
- CDEBUG(D_INODE, "["LPU64"->"LPU64"] -> [(%d) "LPU64"->"LPU64" (%d)]\n",
- start, end, start_side, *obd_start, *obd_end, end_side);
+ CDEBUG(D_INODE, "[%lld->%lld] -> [(%d) %lld->%lld (%d)]\n",
+ start, end, start_side, *obd_start, *obd_end, end_side);
/* this stripe doesn't intersect the file extent when neither
* start or the end intersected the stripe and obd_start and
}
/* compute which stripe number "lov_off" will be written into */
-int lov_stripe_number(struct lov_stripe_md *lsm, obd_off lov_off)
+int lov_stripe_number(struct lov_stripe_md *lsm, int index, loff_t lov_off)
{
- unsigned long ssize = lsm->lsm_stripe_size;
- obd_off stripe_off, swidth;
- int magic = lsm->lsm_magic;
+ unsigned long ssize = lsm->lsm_entries[index]->lsme_stripe_size;
+ loff_t stripe_off;
+ loff_t swidth;
- LASSERT(lsm_op_find(magic) != NULL);
- lsm_op_find(magic)->lsm_stripe_by_offset(lsm, NULL, &lov_off, &swidth);
+ swidth = stripe_width(lsm, index);
- stripe_off = ll_do_div64(lov_off, swidth);
+ stripe_off = lov_do_div64(lov_off, swidth);
- /* Puts stripe_off/ssize result into stripe_off */
- do_div(stripe_off, ssize);
+ /* Puts stripe_off/ssize result into stripe_off */
+ lov_do_div64(stripe_off, ssize);
- return stripe_off;
+ return stripe_off;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff