From: Zhao Lei <zhaolei@cn.fujitsu.com>
Date: Mon, 24 Aug 2015 08:45:02 +0000 (+0800)
Subject: btrfs-progs: Introduce btrfs_close_all_devices helper
X-Git-Tag: upstream/4.16.1~2064
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b0f760c91aa9de9a853545f36dc063f6ef5e9008;p=platform%2Fupstream%2Fbtrfs-progs.git

btrfs-progs: Introduce btrfs_close_all_devices helper

If there is more than one fs_devices in fs_uuids list (like mkfs.btrfs
does), we need close them all before exit. Add a helper for that.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/volumes.c b/volumes.c
index f7462c5..ca50f1c 100644
--- a/volumes.c
+++ b/volumes.c
@@ -198,6 +198,17 @@ again:
 	return 0;
 }
 
+void btrfs_close_all_devices(void)
+{
+	struct btrfs_fs_devices *fs_devices;
+
+	while (!list_empty(&fs_uuids)) {
+		fs_devices = list_entry(fs_uuids.next, struct btrfs_fs_devices,
+					list);
+		btrfs_close_devices(fs_devices);
+	}
+}
+
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, int flags)
 {
 	int fd;
diff --git a/volumes.h b/volumes.h
index 71d5d66..f776131 100644
--- a/volumes.h
+++ b/volumes.h
@@ -187,6 +187,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans,
 int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 		       int flags);
 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
+void btrfs_close_all_devices(void);
 int btrfs_add_device(struct btrfs_trans_handle *trans,
 		     struct btrfs_root *root,
 		     struct btrfs_device *device);