We should insert/update 6 items(root ref, root backref, dir item, dir index,
root item and parent inode) when creating a snapshot, not 5 items, fix it.
Signed-off-by: Miao Xie <miaox@xxxxxxxxxxxxxx>
---
Changelog v1 -> v4:
- new patch.
---
fs/btrfs/extent-tree.c | 6 +++---
fs/btrfs/ioctl.c | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 840bfee..a010234 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4418,10 +4418,10 @@ int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_block_rsv *src_rsv = get_block_rsv(trans, root);
struct btrfs_block_rsv *dst_rsv = &pending->block_rsv;
/*
- * two for root back/forward refs, two for directory entries
- * and one for root of the snapshot.
+ * two for root back/forward refs, two for directory entries,
+ * one for root of the snapshot and one for parent inode.
*/
- u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5);
+ u64 num_bytes = btrfs_calc_trans_metadata_size(root, 6);
dst_rsv->space_info = src_rsv->space_info;
return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes);
}
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 3a16327..9384a2a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -526,7 +526,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
*inherit = NULL; /* take responsibility to free it */
}
- trans = btrfs_start_transaction(root->fs_info->extent_root, 5);
+ trans = btrfs_start_transaction(root->fs_info->extent_root, 6);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto fail;
--
1.7.6.5
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