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btrfs: hold a ref on the root in record_reloc_root_in_trans

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We are recording this root in the transaction, so we need to hold a ref
on it until we do that.

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 09:32:41 -05:00 committed by David Sterba
parent ab9737bd75
commit 442b1ac524
1 changed files with 5 additions and 1 deletions
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6
fs/btrfs/relocation.c
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@ -2648,15 +2648,19 @@ static int record_reloc_root_in_trans(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *fs_info = reloc_root->fs_info;
struct btrfs_root *root;
int ret;
if (reloc_root->last_trans == trans->transid)
return 0;
root = read_fs_root(fs_info, reloc_root->root_key.offset);
BUG_ON(IS_ERR(root));
BUG_ON(!btrfs_grab_fs_root(root));
BUG_ON(root->reloc_root != reloc_root);
ret = btrfs_record_root_in_trans(trans, root);
btrfs_put_fs_root(root);
return btrfs_record_root_in_trans(trans, root);
return ret;
}
static noinline_for_stack