Commit 33005fd0 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: refactor file range validation 



Refactor all the open-coded validation of file block ranges into a
single helper, and teach the bmap scrubber to check the ranges.

Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 18695ad4

fs/xfs/libxfs/xfs_bmap.c

+1 −1
Original line number Diff line number Diff line
@@ -6227,7 +6227,7 @@ xfs_bmap_validate_extent( 
{

	struct xfs_mount	*mp = ip->i_mount;



	if (irec->br_startoff + irec->br_blockcount <= irec->br_startoff)

	if (!xfs_verify_fileext(mp, irec->br_startoff, irec->br_blockcount))

		return __this_address;



	if (XFS_IS_REALTIME_INODE(ip) && whichfork == XFS_DATA_FORK) {

fs/xfs/libxfs/xfs_types.c

+25 −0
Original line number Diff line number Diff line
@@ -258,3 +258,28 @@ xfs_verify_dablk( 


	return dabno <= max_dablk;

}



/* Check that a file block offset does not exceed the maximum. */

bool

xfs_verify_fileoff(

	struct xfs_mount	*mp,

	xfs_fileoff_t		off)

{

	return off <= XFS_MAX_FILEOFF;

}



/* Check that a range of file block offsets do not exceed the maximum. */

bool

xfs_verify_fileext(

	struct xfs_mount	*mp,

	xfs_fileoff_t		off,

	xfs_fileoff_t		len)

{

	if (off + len <= off)

		return false;



	if (!xfs_verify_fileoff(mp, off))

		return false;



	return xfs_verify_fileoff(mp, off + len - 1);

}

fs/xfs/libxfs/xfs_types.h

+3 −0
Original line number Diff line number Diff line
@@ -203,5 +203,8 @@ bool xfs_verify_icount(struct xfs_mount *mp, unsigned long long icount); 
bool xfs_verify_dablk(struct xfs_mount *mp, xfs_fileoff_t off);

void xfs_icount_range(struct xfs_mount *mp, unsigned long long *min,

		unsigned long long *max);

bool xfs_verify_fileoff(struct xfs_mount *mp, xfs_fileoff_t off);

bool xfs_verify_fileext(struct xfs_mount *mp, xfs_fileoff_t off,

		xfs_fileoff_t len);



#endif	/* __XFS_TYPES_H__ */

fs/xfs/scrub/bmap.c

+4 −0
Original line number Diff line number Diff line
@@ -329,6 +329,10 @@ xchk_bmap_iextent( 
		xchk_fblock_set_corrupt(info->sc, info->whichfork,

				irec->br_startoff);



	if (!xfs_verify_fileext(mp, irec->br_startoff, irec->br_blockcount))

		xchk_fblock_set_corrupt(info->sc, info->whichfork,

				irec->br_startoff);



	xchk_bmap_dirattr_extent(ip, info, irec);



	/* There should never be a "hole" extent in either extent list. */

fs/xfs/xfs_bmap_item.c

+1 −1
Original line number Diff line number Diff line
@@ -445,7 +445,7 @@ xfs_bui_validate( 
	if (!xfs_verify_ino(mp, bmap->me_owner))

		return false;



	if (bmap->me_startoff + bmap->me_len <= bmap->me_startoff)

	if (!xfs_verify_fileext(mp, bmap->me_startoff, bmap->me_len))

		return false;



	return xfs_verify_fsbext(mp, bmap->me_startblock, bmap->me_len);

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