[PATCH 28/44] btrfs: hold a ref on the root in create_reloc_inode

Josef Bacik
2019-12-06T14:46:33Z

We're creating a reloc inode in the data reloc tree, we need to hold a
ref on the root while we're doing that.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
fs/btrfs/relocation.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 3b419a4e4829..4e455703439b 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4269,10 +4269,14 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
root = read_fs_root(fs_info, BTRFS_DATA_RELOC_TREE_OBJECTID);
if (IS_ERR(root))
return ERR_CAST(root);
+ if (!btrfs_grab_fs_root(root))
+ return ERR_PTR(-ENOENT);

trans = btrfs_start_transaction(root, 6);
- if (IS_ERR(trans))
+ if (IS_ERR(trans)) {
+ btrfs_put_fs_root(root);
return ERR_CAST(trans);
+ }

err = btrfs_find_free_objectid(root, &objectid);
if (err)
@@ -4290,6 +4294,7 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,

err = btrfs_orphan_add(trans, BTRFS_I(inode));
out:
+ btrfs_put_fs_root(root);
btrfs_end_transaction(trans);
btrfs_btree_balance_dirty(fs_info);
if (err) {
--
2.23.0