diff options
| author | Chandan Babu R <chandan.babu@oracle.com> | 2021-08-09 08:35:22 +0200 |
|---|---|---|
| committer | Chandan Babu R <chandan.babu@oracle.com> | 2022-04-11 06:11:17 +0200 |
| commit | 95f0b95e2b686ceaa3f465e9fa079f22e0fe7665 (patch) | |
| tree | 6ad802b3e0cc7f9cccc1d7e051bc7d5c6f003955 /fs/xfs/xfs_bmap_util.c | |
| parent | xfs: Move extent count limits to xfs_format.h (diff) | |
| download | linux-95f0b95e2b686ceaa3f465e9fa079f22e0fe7665.tar.xz linux-95f0b95e2b686ceaa3f465e9fa079f22e0fe7665.zip | |
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/xfs_bmap_util.c')
| -rw-r--r-- | fs/xfs/xfs_bmap_util.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index eb2e387ba528..18c1b99311a8 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -119,14 +119,14 @@ retry: */ ralen = ap->length / mp->m_sb.sb_rextsize; /* - * If the old value was close enough to MAXEXTLEN that + * If the old value was close enough to XFS_BMBT_MAX_EXTLEN that * we rounded up to it, cut it back so it's valid again. * Note that if it's a really large request (bigger than - * MAXEXTLEN), we don't hear about that number, and can't + * XFS_BMBT_MAX_EXTLEN), we don't hear about that number, and can't * adjust the starting point to match it. */ - if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN) - ralen = MAXEXTLEN / mp->m_sb.sb_rextsize; + if (ralen * mp->m_sb.sb_rextsize >= XFS_MAX_BMBT_EXTLEN) + ralen = XFS_MAX_BMBT_EXTLEN / mp->m_sb.sb_rextsize; /* * Lock out modifications to both the RT bitmap and summary inodes @@ -839,9 +839,11 @@ xfs_alloc_file_space( * count, hence we need to limit the number of blocks we are * trying to reserve to avoid an overflow. We can't allocate * more than @nimaps extents, and an extent is limited on disk - * to MAXEXTLEN (21 bits), so use that to enforce the limit. + * to XFS_BMBT_MAX_EXTLEN (21 bits), so use that to enforce the + * limit. */ - resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps)); + resblks = min_t(xfs_fileoff_t, (e - s), + (XFS_MAX_BMBT_EXTLEN * nimaps)); if (unlikely(rt)) { dblocks = XFS_DIOSTRAT_SPACE_RES(mp, 0); rblocks = resblks; |