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btrfs: hold a ref on the root in __btrfs_run_defrag_inode

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We are looking up an arbitrary inode, we need to hold a ref on the root
while we're doing this.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2020-01-24 09:32:30 -05:00 committed by David Sterba
parent bdf70b9e75
commit 02162a0265
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/file.c
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@ -292,11 +292,16 @@ static int __btrfs_run_defrag_inode(struct btrfs_fs_info *fs_info,
ret = PTR_ERR(inode_root);
goto cleanup;
}
if (!btrfs_grab_fs_root(inode_root)) {
ret = -ENOENT;
goto cleanup;
}
key.objectid = defrag->ino;
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
inode = btrfs_iget(fs_info->sb, &key, inode_root);
btrfs_put_fs_root(inode_root);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);
goto cleanup;