[RFC PATCH 13/14] btrfs-progs: refactor btrfs_scan_devices() to accept verbose argument

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

Function btrfs_scan_devices() is being used by commands such as
'btrfs filesystem' and 'btrfs device', by having the verbose argument in
the btrfs_scan_devices() we can control which threads to show the
verbose when verbose is enabled by the global verbose option.

So add an option %verbose to btrfs_scan_devices().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 cmds/device.c        | 2 +-
 cmds/filesystem.c    | 2 +-
 common/device-scan.c | 4 +++-
 common/device-scan.h | 2 +-
 common/utils.c       | 2 +-
 disk-io.c            | 2 +-
 6 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/cmds/device.c b/cmds/device.c
index 24158308a41b..b429a169cd5d 100644
--- a/cmds/device.c
+++ b/cmds/device.c
@@ -354,7 +354,7 @@ static int cmd_device_scan(const struct cmd_struct *cmd, int argc, char **argv)
 			}
 		} else {
 			printf("Scanning for Btrfs filesystems\n");
-			ret = btrfs_scan_devices();
+			ret = btrfs_scan_devices(false);
 			error_on(ret, "error %d while scanning", ret);
 			ret = btrfs_register_all_devices();
 			error_on(ret,
diff --git a/cmds/filesystem.c b/cmds/filesystem.c
index ee4d366fbf64..fb6e2e998dcf 100644
--- a/cmds/filesystem.c
+++ b/cmds/filesystem.c
@@ -746,7 +746,7 @@ devs_only:
 		else
 			ret = 1;
 	} else {
-		ret = btrfs_scan_devices();
+		ret = btrfs_scan_devices(false);
 	}
 
 	if (ret) {
diff --git a/common/device-scan.c b/common/device-scan.c
index 48dbd9e19715..a5963d789f49 100644
--- a/common/device-scan.c
+++ b/common/device-scan.c
@@ -26,6 +26,7 @@
 #include <linux/limits.h>
 #include <blkid/blkid.h>
 #include <uuid/uuid.h>
+#include <stdbool.h>
 #include "kernel-lib/overflow.h"
 #include "common/path-utils.h"
 #include "common/device-scan.h"
@@ -360,7 +361,7 @@ void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
 	}
 }
 
-int btrfs_scan_devices(void)
+int btrfs_scan_devices(bool verbose)
 {
 	int fd = -1;
 	int ret;
@@ -404,6 +405,7 @@ int btrfs_scan_devices(void)
 			close (fd);
 			continue;
 		}
+		pr_verbose(verbose, "registered: %s\n", path);
 
 		close(fd);
 	}
diff --git a/common/device-scan.h b/common/device-scan.h
index eda2bae5c6c4..c50fe2fbf91f 100644
--- a/common/device-scan.h
+++ b/common/device-scan.h
@@ -29,7 +29,7 @@ struct seen_fsid {
 	int fd;
 };
 
-int btrfs_scan_devices(void);
+int btrfs_scan_devices(bool verbose);
 int btrfs_register_one_device(const char *fname);
 int btrfs_register_all_devices(void);
 int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
diff --git a/common/utils.c b/common/utils.c
index 6617b3ef38b1..9027de596f5d 100644
--- a/common/utils.c
+++ b/common/utils.c
@@ -277,7 +277,7 @@ int check_mounted_where(int fd, const char *file, char *where, int size,
 
 	/* scan other devices */
 	if (is_btrfs && total_devs > 1) {
-		ret = btrfs_scan_devices();
+		ret = btrfs_scan_devices(false);
 		if (ret)
 			return ret;
 	}
diff --git a/disk-io.c b/disk-io.c
index a9744af90a43..33bd003167fe 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -1100,7 +1100,7 @@ int btrfs_scan_fs_devices(int fd, const char *path,
 	}
 
 	if (!skip_devices && total_devs != 1) {
-		ret = btrfs_scan_devices();
+		ret = btrfs_scan_devices(false);
 		if (ret)
 			return ret;
 	}
-- 
1.8.3.1