diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_rtrmap_btree.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_rtrmap_btree.c b/fs/xfs/libxfs/xfs_rtrmap_btree.c index eca0211f1c1d..a1584784991e 100644 --- a/fs/xfs/libxfs/xfs_rtrmap_btree.c +++ b/fs/xfs/libxfs/xfs_rtrmap_btree.c @@ -594,9 +594,17 @@ xfs_rtrmapbt_compute_maxlevels( * The realtime rmapbt lives on the data device, which means that its * maximum height is constrained by the size of the data device and * the height required to store one rmap record for each rt block. + * + * On a reflink filesystem, each rt block can have up to 2^32 (per the + * refcount record format) owners, which means that theoretically we + * could face up to 2^96 rmap records. This makes the computation of + * maxlevels based on record count meaningless, so we only consider the + * size of the data device. */ d_maxlevels = xfs_btree_compute_maxlevels_size(dblocks, mp->m_rtrmap_mnr[1]); + if (xfs_has_rtreflink(mp)) + return d_maxlevels + 1; r_maxlevels = xfs_btree_compute_maxlevels(mp->m_rtrmap_mnr, rblocks); /* Add one level to handle the inode root level. */ |