100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* refcounttree.c
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*
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* Copyright (C) 2009 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#define MLOG_MASK_PREFIX ML_REFCOUNT
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "inode.h"
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#include "alloc.h"
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#include "suballoc.h"
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#include "journal.h"
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#include "uptodate.h"
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#include "super.h"
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#include "buffer_head_io.h"
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#include "blockcheck.h"
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static int ocfs2_validate_refcount_block(struct super_block *sb,
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struct buffer_head *bh)
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{
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int rc;
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struct ocfs2_refcount_block *rb =
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(struct ocfs2_refcount_block *)bh->b_data;
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mlog(0, "Validating refcount block %llu\n",
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(unsigned long long)bh->b_blocknr);
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BUG_ON(!buffer_uptodate(bh));
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/*
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* If the ecc fails, we return the error but otherwise
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* leave the filesystem running. We know any error is
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* local to this block.
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*/
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rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &rb->rf_check);
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if (rc) {
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mlog(ML_ERROR, "Checksum failed for refcount block %llu\n",
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(unsigned long long)bh->b_blocknr);
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return rc;
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}
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if (!OCFS2_IS_VALID_REFCOUNT_BLOCK(rb)) {
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ocfs2_error(sb,
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"Refcount block #%llu has bad signature %.*s",
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(unsigned long long)bh->b_blocknr, 7,
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rb->rf_signature);
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return -EINVAL;
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}
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if (le64_to_cpu(rb->rf_blkno) != bh->b_blocknr) {
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ocfs2_error(sb,
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"Refcount block #%llu has an invalid rf_blkno "
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"of %llu",
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(unsigned long long)bh->b_blocknr,
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(unsigned long long)le64_to_cpu(rb->rf_blkno));
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return -EINVAL;
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}
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if (le32_to_cpu(rb->rf_fs_generation) != OCFS2_SB(sb)->fs_generation) {
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ocfs2_error(sb,
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"Refcount block #%llu has an invalid "
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"rf_fs_generation of #%u",
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(unsigned long long)bh->b_blocknr,
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le32_to_cpu(rb->rf_fs_generation));
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return -EINVAL;
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}
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return 0;
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}
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static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci,
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u64 rb_blkno,
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struct buffer_head **bh)
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{
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int rc;
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struct buffer_head *tmp = *bh;
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rc = ocfs2_read_block(ci, rb_blkno, &tmp,
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ocfs2_validate_refcount_block);
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/* If ocfs2_read_block() got us a new bh, pass it up. */
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if (!rc && !*bh)
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*bh = tmp;
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return rc;
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}
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