From: Josef Bacik <josef@toxicpanda.com>
Date: Fri, 24 Jan 2020 09:32:43 -0500
Git-commit: 76deacf02387f0cd5b6125fb54caaabe595ffc17
Patch-mainline: 5.7-rc1
References: bsc#1176019
Subject: [PATCH] btrfs: hold a ref on the root in create_reloc_inode
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>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.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 976917ca412a..a257147db7a9 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4351,10 +4351,14 @@ 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)
@@ -4372,6 +4376,7 @@ 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) {
--
2.26.2