[PATCH V4 09/12] Btrfs: fix wrong size for the reservation of the, snapshot creation
From: Miao Xie <hidden>
Date: 2012-09-06 10:44:50
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
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 <redacted> --- 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