btrfs: make btrfs_check_uuid_tree private to disk-io.c
It's used only during filesystem mount as such it can be made private to
disk-io.c file. Also use the occasion to move btrfs_uuid_rescan_kthread
as btrfs_check_uuid_tree is its sole caller.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 756bf2a..074b770 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2835,6 +2835,41 @@ static int init_mount_fs_info(struct btrfs_fs_info *fs_info, struct super_block
return ret;
}
+static int btrfs_uuid_rescan_kthread(void *data)
+{
+ struct btrfs_fs_info *fs_info = (struct btrfs_fs_info *)data;
+ int ret;
+
+ /*
+ * 1st step is to iterate through the existing UUID tree and
+ * to delete all entries that contain outdated data.
+ * 2nd step is to add all missing entries to the UUID tree.
+ */
+ ret = btrfs_uuid_tree_iterate(fs_info);
+ if (ret < 0) {
+ btrfs_warn(fs_info, "iterating uuid_tree failed %d", ret);
+ up(&fs_info->uuid_tree_rescan_sem);
+ return ret;
+ }
+ return btrfs_uuid_scan_kthread(data);
+}
+
+static int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info)
+{
+ struct task_struct *task;
+
+ down(&fs_info->uuid_tree_rescan_sem);
+ task = kthread_run(btrfs_uuid_rescan_kthread, fs_info, "btrfs-uuid");
+ if (IS_ERR(task)) {
+ /* fs_info->update_uuid_tree_gen remains 0 in all error case */
+ btrfs_warn(fs_info, "failed to start uuid_rescan task");
+ up(&fs_info->uuid_tree_rescan_sem);
+ return PTR_ERR(task);
+ }
+
+ return 0;
+}
+
int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_devices,
char *options)
{