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xfs: factor out dir2 data block reading

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And add a verifier callback function while there.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Phil White <pwhite@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner
2012-11-12 22:54:14 +11:00
committed by Ben Myers
parent 2025207ca6
commit e481357264
5 changed files with 56 additions and 27 deletions
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32
fs/xfs/xfs_dir2_data.c
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@@ -185,6 +185,38 @@ __xfs_dir2_data_check(
return 0;
}
static void
xfs_dir2_data_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_dir2_data_hdr *hdr = bp->b_addr;
int block_ok = 0;
block_ok = hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC);
block_ok = block_ok && __xfs_dir2_data_check(NULL, bp) == 0;
if (!block_ok) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
xfs_buf_ioerror(bp, EFSCORRUPTED);
}
bp->b_iodone = NULL;
xfs_buf_ioend(bp, 0);
}
int
xfs_dir2_data_read(
struct xfs_trans *tp,
struct xfs_inode *dp,
xfs_dablk_t bno,
xfs_daddr_t mapped_bno,
struct xfs_buf **bpp)
{
return xfs_da_read_buf(tp, dp, bno, mapped_bno, bpp,
XFS_DATA_FORK, xfs_dir2_data_verify);
}
/*
* Given a data block and an unused entry from that block,
* return the bestfree entry if any that corresponds to it.