diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2021-09-01 11:18:40 -0700 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2021-10-22 16:41:08 -0700 |
| commit | e22660dc7050040ef73552e0bb24ec6accffd78b (patch) | |
| tree | a04655117998b129d9dfb04a609a13d6b9c60750 /fs/xfs/libxfs | |
| parent | 3dae68d1b4372a5f8fe84c4d39033add164662d6 (diff) | |
xfs: add metadata reservations for realtime refcount btree
Reserve some free blocks so that we will always have enough free blocks
in the data volume to handle expansion of the realtime refcount btree.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_rtrefcount_btree.c | 37 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_rtrefcount_btree.h | 1 |
2 files changed, 38 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_rtrefcount_btree.c b/fs/xfs/libxfs/xfs_rtrefcount_btree.c index 52ed21c52d7b..94ea2d53cbcd 100644 --- a/fs/xfs/libxfs/xfs_rtrefcount_btree.c +++ b/fs/xfs/libxfs/xfs_rtrefcount_btree.c @@ -408,3 +408,40 @@ xfs_rtrefcountbt_compute_maxlevels( /* Add one level to handle the inode root level. */ return min(d_maxlevels, r_maxlevels) + 1; } + +/* Calculate the rtrefcount btree size for some records. */ +static unsigned long long +xfs_rtrefcountbt_calc_size( + struct xfs_mount *mp, + unsigned long long len) +{ + return xfs_btree_calc_size(mp->m_rtrefc_mnr, len); +} + +/* + * Calculate the maximum refcount btree size. + */ +static unsigned long long +xfs_rtrefcountbt_max_size( + struct xfs_mount *mp, + xfs_rtblock_t rtblocks) +{ + /* Bail out if we're uninitialized, which can happen in mkfs. */ + if (mp->m_rtrefc_mxr[0] == 0) + return 0; + + return xfs_rtrefcountbt_calc_size(mp, rtblocks); +} + +/* + * Figure out how many blocks to reserve and how many are used by this btree. + */ +xfs_filblks_t +xfs_rtrefcountbt_calc_reserves( + struct xfs_mount *mp) +{ + if (!xfs_has_rtreflink(mp)) + return 0; + + return xfs_rtrefcountbt_max_size(mp, mp->m_sb.sb_rblocks); +} diff --git a/fs/xfs/libxfs/xfs_rtrefcount_btree.h b/fs/xfs/libxfs/xfs_rtrefcount_btree.h index e3d274c1774c..6c63c8336c54 100644 --- a/fs/xfs/libxfs/xfs_rtrefcount_btree.h +++ b/fs/xfs/libxfs/xfs_rtrefcount_btree.h @@ -63,5 +63,6 @@ xfs_rtrefcount_ptr_addr( } int __init xfs_rtrefcountbt_create_cursor_cache(void); +xfs_filblks_t xfs_rtrefcountbt_calc_reserves(struct xfs_mount *mp); #endif /* __XFS_RTREFCOUNT_BTREE_H__ */ |