diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-09-03 08:13:13 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-09-03 08:13:13 -0700 |
| commit | eb77b23b565e7e1d2cc3a7d9e4cc186fb54e81a8 (patch) | |
| tree | 68d315c1ce1e57593275eeb6b19871a4aaf7a32a /fs/xfs/libxfs/xfs_bmap.h | |
| parent | 1baa2800e62d7d58c04cb871a6e4189fc3e1ccf1 (diff) | |
xfs: add a xfs_valid_startblock helperxfs-5.4-merge-4
Add a helper that validates the startblock is valid. This checks for a
non-zero block on the main device, but skips that check for blocks on
the realtime device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h index c409871a096e..5bb446d80542 100644 --- a/fs/xfs/libxfs/xfs_bmap.h +++ b/fs/xfs/libxfs/xfs_bmap.h @@ -171,6 +171,13 @@ static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec) !isnullstartblock(irec->br_startblock); } +/* + * Check the mapping for obviously garbage allocations that could trash the + * filesystem immediately. + */ +#define xfs_valid_startblock(ip, startblock) \ + ((startblock) != 0 || XFS_IS_REALTIME_INODE(ip)) + void xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno, xfs_filblks_t len); int xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd); |