Commit f2c870e3 authored by Tao Ma's avatar Tao Ma Committed by Joel Becker
Browse files

ocfs2: Add ocfs2_read_refcount_block.


Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
parent 93c97087
......@@ -28,6 +28,7 @@ ocfs2-objs := \
locks.o \
mmap.o \
namei.o \
refcounttree.o \
resize.o \
slot_map.o \
suballoc.o \
......
......@@ -111,6 +111,7 @@ static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = {
define_mask(EXPORT),
define_mask(XATTR),
define_mask(QUOTA),
define_mask(REFCOUNT),
define_mask(ERROR),
define_mask(NOTICE),
define_mask(KTHREAD),
......
......@@ -113,6 +113,7 @@
#define ML_EXPORT 0x0000000010000000ULL /* ocfs2 export operations */
#define ML_XATTR 0x0000000020000000ULL /* ocfs2 extended attributes */
#define ML_QUOTA 0x0000000040000000ULL /* ocfs2 quota operations */
#define ML_REFCOUNT 0x0000000080000000ULL /* refcount tree operations */
/* bits that are infrequently given and frequently matched in the high word */
#define ML_ERROR 0x0000000100000000ULL /* sent to KERN_ERR */
#define ML_NOTICE 0x0000000200000000ULL /* setn to KERN_NOTICE */
......
......@@ -610,6 +610,9 @@ static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
#define OCFS2_IS_VALID_DX_LEAF(ptr) \
(!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE))
#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \
(!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE))
static inline unsigned long ino_from_blkno(struct super_block *sb,
u64 blkno)
{
......
/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* refcounttree.c
*
* Copyright (C) 2009 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License version 2 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 for more details.
*/
#define MLOG_MASK_PREFIX ML_REFCOUNT
#include <cluster/masklog.h>
#include "ocfs2.h"
#include "inode.h"
#include "alloc.h"
#include "suballoc.h"
#include "journal.h"
#include "uptodate.h"
#include "super.h"
#include "buffer_head_io.h"
#include "blockcheck.h"
static int ocfs2_validate_refcount_block(struct super_block *sb,
struct buffer_head *bh)
{
int rc;
struct ocfs2_refcount_block *rb =
(struct ocfs2_refcount_block *)bh->b_data;
mlog(0, "Validating refcount block %llu\n",
(unsigned long long)bh->b_blocknr);
BUG_ON(!buffer_uptodate(bh));
/*
* If the ecc fails, we return the error but otherwise
* leave the filesystem running. We know any error is
* local to this block.
*/
rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &rb->rf_check);
if (rc) {
mlog(ML_ERROR, "Checksum failed for refcount block %llu\n",
(unsigned long long)bh->b_blocknr);
return rc;
}
if (!OCFS2_IS_VALID_REFCOUNT_BLOCK(rb)) {
ocfs2_error(sb,
"Refcount block #%llu has bad signature %.*s",
(unsigned long long)bh->b_blocknr, 7,
rb->rf_signature);
return -EINVAL;
}
if (le64_to_cpu(rb->rf_blkno) != bh->b_blocknr) {
ocfs2_error(sb,
"Refcount block #%llu has an invalid rf_blkno "
"of %llu",
(unsigned long long)bh->b_blocknr,
(unsigned long long)le64_to_cpu(rb->rf_blkno));
return -EINVAL;
}
if (le32_to_cpu(rb->rf_fs_generation) != OCFS2_SB(sb)->fs_generation) {
ocfs2_error(sb,
"Refcount block #%llu has an invalid "
"rf_fs_generation of #%u",
(unsigned long long)bh->b_blocknr,
le32_to_cpu(rb->rf_fs_generation));
return -EINVAL;
}
return 0;
}
static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci,
u64 rb_blkno,
struct buffer_head **bh)
{
int rc;
struct buffer_head *tmp = *bh;
rc = ocfs2_read_block(ci, rb_blkno, &tmp,
ocfs2_validate_refcount_block);
/* If ocfs2_read_block() got us a new bh, pass it up. */
if (!rc && !*bh)
*bh = tmp;
return rc;
}
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