diff options
| author | Chandan Babu R <chandan.babu@oracle.com> | 2021-08-09 12:05:22 +0530 |
|---|---|---|
| committer | Chandan Babu R <chandan.babu@oracle.com> | 2022-04-11 04:11:17 +0000 |
| commit | 95f0b95e2b686ceaa3f465e9fa079f22e0fe7665 (patch) | |
| tree | 6ad802b3e0cc7f9cccc1d7e051bc7d5c6f003955 /fs/xfs/libxfs/xfs_format.h | |
| parent | 3b0d9fd369ea48419ccb578e0bafa4c54df63ba6 (diff) | |
xfs: Define max extent length based on on-disk format definition
The maximum extent length depends on maximum block count that can be stored in
a BMBT record. Hence this commit defines MAXEXTLEN based on
BMBT_BLOCKCOUNT_BITLEN.
While at it, the commit also renames MAXEXTLEN to XFS_MAX_BMBT_EXTLEN.
Suggested-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_format.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index d75e5b16da7e..66594853a88b 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -870,9 +870,8 @@ enum xfs_dinode_fmt { { XFS_DINODE_FMT_UUID, "uuid" } /* - * Max values for extlen, extnum, aextnum. + * Max values for extnum and aextnum. */ -#define MAXEXTLEN ((xfs_extlen_t)0x001fffff) /* 21 bits */ #define MAXEXTNUM ((xfs_extnum_t)0x7fffffff) /* signed int */ #define MAXAEXTNUM ((xfs_aextnum_t)0x7fff) /* signed short */ @@ -1603,6 +1602,8 @@ typedef struct xfs_bmdr_block { #define BMBT_STARTOFF_MASK ((1ULL << BMBT_STARTOFF_BITLEN) - 1) #define BMBT_BLOCKCOUNT_MASK ((1ULL << BMBT_BLOCKCOUNT_BITLEN) - 1) +#define XFS_MAX_BMBT_EXTLEN ((xfs_extlen_t)(BMBT_BLOCKCOUNT_MASK)) + /* * bmbt records have a file offset (block) field that is 54 bits wide, so this * is the largest xfs_fileoff_t that we ever expect to see. |