diff options
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a71fcf50653..99ab5716baa 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4025,16 +4025,24 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes) ret = reserve_metadata_bytes(NULL, root, block_rsv, to_reserve, 1); if (ret) { + u64 to_free = 0; unsigned dropped; - /* - * We don't need the return value since our reservation failed, - * we just need to clean up our counter. - */ + spin_lock(&BTRFS_I(inode)->lock); dropped = drop_outstanding_extent(inode); - WARN_ON(dropped > 1); - BTRFS_I(inode)->csum_bytes -= num_bytes; + to_free = calc_csum_metadata_size(inode, num_bytes, 0); spin_unlock(&BTRFS_I(inode)->lock); + to_free += btrfs_calc_trans_metadata_size(root, dropped); + + /* + * Somebody could have come in and twiddled with the + * reservation, so if we have to free more than we would have + * reserved from this reservation go ahead and release those + * bytes. + */ + to_free -= to_reserve; + if (to_free) + btrfs_block_rsv_release(root, block_rsv, to_free); return ret; } |