btrfs-progs: use kernel for mounted disk for show

As of now btrfs filesystem show reads directly from
disks. So sometimes output can be stale, mainly when
user wants to cross verify their operation like,
label or device delete or add... etc. so this
patch will read from the kernel ioctl if it finds
that disk is mounted.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/utils.h b/utils.h
index 7a748266..251ef8e5 100644
--- a/utils.h
+++ b/utils.h
@@ -25,10 +25,17 @@
 
 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
 
-#define BTRFS_SCAN_PROC	1
-#define BTRFS_SCAN_DEV		2
+#define BTRFS_SCAN_PROC		(1ULL << 0)
+#define BTRFS_SCAN_DEV		(1ULL << 1)
+#define BTRFS_SCAN_MOUNTED	(1ULL << 2)
 #define BTRFS_SCAN_LBLKID	(1ULL << 3)
 
+#define BTRFS_UPDATE_KERNEL	1
+
+#define BTRFS_ARG_UNKNOWN	0
+#define BTRFS_ARG_PATH		1
+#define BTRFS_ARG_UUID		2
+
 int make_btrfs(int fd, const char *device, const char *label,
 	       u64 blocks[6], u64 num_bytes, u32 nodesize,
 	       u32 leafsize, u32 sectorsize, u32 stripesize, u64 features);