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| author | Chris Mason <chris.mason@oracle.com> | 2007-04-10 15:27:04 +0200 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-04-10 15:27:04 +0200 |
| commit | c5739bba5260a59cebd20a51a55080592c8d3b07 (patch) | |
| tree | ff33f7acddcfc60e7395209ff949bb9d90afda32 /fs/btrfs/root-tree.c | |
| parent | Btrfs: groundwork for subvolume and snapshot roots (diff) | |
| download | linux-c5739bba5260a59cebd20a51a55080592c8d3b07.tar.xz linux-c5739bba5260a59cebd20a51a55080592c8d3b07.zip | |
Btrfs: snapshot progress
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/root-tree.c')
| -rw-r--r-- | fs/btrfs/root-tree.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index ddc1c13a5352..72be9836932f 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -83,6 +83,8 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, { struct btrfs_path *path; int ret; + u32 refs; + struct btrfs_root_item *ri; path = btrfs_alloc_path(); BUG_ON(!path); @@ -91,7 +93,19 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (ret < 0) goto out; BUG_ON(ret != 0); - ret = btrfs_del_item(trans, root, path); + ri = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), + path->slots[0], struct btrfs_root_item); + + refs = btrfs_root_refs(ri); + BUG_ON(refs == 0); + if (refs == 1) { + ret = btrfs_del_item(trans, root, path); +printk("deleting root %Lu %Lu %u\n", key->objectid, key->offset, key->flags); + } else { + btrfs_set_root_refs(ri, refs - 1); +printk("ref now %u root %Lu %Lu %u\n", refs -1, key->objectid, key->offset, key->flags); + mark_buffer_dirty(path->nodes[0]); + } out: btrfs_release_path(root, path); btrfs_free_path(path); |