From 5b0ff67223de3b7b97cbfcc03882a55a11003f8b Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Wed, 1 Sep 2021 11:15:42 -0700 Subject: xfs: move the zero records logic into xfs_bmap_broot_space_calc The bmap btree cannot ever have zero records in an incore btree block. If the number of records drops to zero, that means we're converting the fork to extents format and are trying to remove the tree. This logic won't hold for the future realtime rmap btree, so move the logic into the bmbt code. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_bmap_btree.h | 7 +++++++ fs/xfs/libxfs/xfs_inode_fork.c | 6 ++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bmap_btree.h b/fs/xfs/libxfs/xfs_bmap_btree.h index 3fe9c4f7f1a0..5a3bae94debd 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.h +++ b/fs/xfs/libxfs/xfs_bmap_btree.h @@ -162,6 +162,13 @@ xfs_bmap_broot_space_calc( struct xfs_mount *mp, unsigned int nrecs) { + /* + * If the bmbt root block is empty, we should be converting the fork + * to extents format. Hence, the size is zero. + */ + if (nrecs == 0) + return 0; + return xfs_bmbt_block_len(mp) + \ (nrecs * (sizeof(struct xfs_bmbt_key) + sizeof(xfs_bmbt_ptr_t))); } diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c index 832c8ec8bea6..9da5073fd91e 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.c +++ b/fs/xfs/libxfs/xfs_inode_fork.c @@ -483,10 +483,8 @@ xfs_iroot_realloc( cur_max = xfs_bmbt_maxrecs(mp, old_size, 0); new_max = cur_max + rec_diff; ASSERT(new_max >= 0); - if (new_max > 0) - new_size = xfs_bmap_broot_space_calc(mp, new_max); - else - new_size = 0; + + new_size = xfs_bmap_broot_space_calc(mp, new_max); if (new_size == 0) { xfs_iroot_free(ip, whichfork); return; -- cgit v1.2.3