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btrfs: hold a ref for the root in btrfs_find_orphan_roots

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We lookup roots for every orphan item we have, we need to hold a ref on
the root while we're doing this work.

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 09:32:46 -05:00 committed by David Sterba
parent 9f583209f2
commit 0b2dee5cff
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/root-tree.c
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@ -257,6 +257,8 @@ int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info)
root = btrfs_get_fs_root(fs_info, &root_key, false);
err = PTR_ERR_OR_ZERO(root);
if (!err && !btrfs_grab_fs_root(root))
err = -ENOENT;
if (err && err != -ENOENT) {
break;
} else if (err == -ENOENT) {
@ -287,6 +289,7 @@ int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info)
set_bit(BTRFS_ROOT_DEAD_TREE, &root->state);
btrfs_add_dead_root(root);
}
btrfs_put_fs_root(root);
}
btrfs_free_path(path);