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_trans_resv.c | |
| 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_trans_resv.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_trans_resv.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c index 6f83d9b306ee..8e1d09e8cc9a 100644 --- a/fs/xfs/libxfs/xfs_trans_resv.c +++ b/fs/xfs/libxfs/xfs_trans_resv.c @@ -199,8 +199,8 @@ xfs_calc_inode_chunk_res( /* * Per-extent log reservation for the btree changes involved in freeing or * allocating a realtime extent. We have to be able to log as many rtbitmap - * blocks as needed to mark inuse MAXEXTLEN blocks' worth of realtime extents, - * as well as the realtime summary block. + * blocks as needed to mark inuse XFS_BMBT_MAX_EXTLEN blocks' worth of realtime + * extents, as well as the realtime summary block. */ static unsigned int xfs_rtalloc_log_count( @@ -210,7 +210,7 @@ xfs_rtalloc_log_count( unsigned int blksz = XFS_FSB_TO_B(mp, 1); unsigned int rtbmp_bytes; - rtbmp_bytes = (MAXEXTLEN / mp->m_sb.sb_rextsize) / NBBY; + rtbmp_bytes = (XFS_MAX_BMBT_EXTLEN / mp->m_sb.sb_rextsize) / NBBY; return (howmany(rtbmp_bytes, blksz) + 1) * num_ops; } @@ -247,7 +247,7 @@ xfs_rtalloc_log_count( * the inode's bmap btree: max depth * block size * the agfs of the ags from which the extents are allocated: 2 * sector * the superblock free block counter: sector size - * the realtime bitmap: ((MAXEXTLEN / rtextsize) / NBBY) bytes + * the realtime bitmap: ((XFS_BMBT_MAX_EXTLEN / rtextsize) / NBBY) bytes * the realtime summary: 1 block * the allocation btrees: 2 trees * (2 * max depth - 1) * block size * And the bmap_finish transaction can free bmap blocks in a join (t3): @@ -299,7 +299,8 @@ xfs_calc_write_reservation( * the agf for each of the ags: 2 * sector size * the agfl for each of the ags: 2 * sector size * the super block to reflect the freed blocks: sector size - * the realtime bitmap: 2 exts * ((MAXEXTLEN / rtextsize) / NBBY) bytes + * the realtime bitmap: + * 2 exts * ((XFS_BMBT_MAX_EXTLEN / rtextsize) / NBBY) bytes * the realtime summary: 2 exts * 1 block * worst case split in allocation btrees per extent assuming 2 extents: * 2 exts * 2 trees * (2 * max depth - 1) * block size |