[PATCH 2/5] btrfs-progs: don't fall back to recursive /dev scan

[Anand Jain <anand.jain@oracle.com>]

From: Eric Sandeen <sandeen@redhat.com>

If we didn't find what we are looking for in /proc/partitions,
we're not going to find it by scanning every node under /dev, either.

But that's just what btrfs_scan_for_fsid() does.

Remove that fallback; at that point btrfs_scan_for_fsid() just calls
scan_for_btrfs(), so remove the wrapper & call it directly.

Side note: so, these paths always use /proc/partitions, not libblkid.
Userspace-intiated scans default to libblkid.  I presume this is
part of the design, and intentional?  Anyway, not changing it now!

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
---
 disk-io.c |  2 +-
 utils.c   | 12 +-----------
 2 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/disk-io.c b/disk-io.c
index f71f5ca..2a1f6d4 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -1007,7 +1007,7 @@ int btrfs_scan_fs_devices(int fd, const char *path,
 	}
 
 	if (total_devs != 1) {
-		ret = btrfs_scan_for_fsid(run_ioctl);
+		ret = scan_for_btrfs(BTRFS_SCAN_PROC, run_ioctl);
 		if (ret)
 			return ret;
 	}
diff --git a/utils.c b/utils.c
index 0064587..cf7635c 100644
--- a/utils.c
+++ b/utils.c
@@ -1148,7 +1148,7 @@ int check_mounted_where(int fd, const char *file, char *where, int size,
 
 	/* scan other devices */
 	if (is_btrfs && total_devs > 1) {
-		if ((ret = btrfs_scan_for_fsid(!BTRFS_UPDATE_KERNEL)))
+		if ((ret = scan_for_btrfs(BTRFS_SCAN_PROC, !BTRFS_UPDATE_KERNEL)))
 			return ret;
 	}
 
@@ -1336,16 +1336,6 @@ fail:
 	return ret;
 }
 
-int btrfs_scan_for_fsid(int run_ioctls)
-{
-	int ret;
-
-	ret = scan_for_btrfs(BTRFS_SCAN_PROC, run_ioctls);
-	if (ret)
-		ret = scan_for_btrfs(BTRFS_SCAN_DEV, run_ioctls);
-	return ret;
-}
-
 int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
 				 int super_offset)
 {
-- 
2.0.0.153.g79dcccc