[PATCH 4/4] btrfs-progs: add global spare device list to filesystem show

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

This patch will add list of spare devices to the filesystem show
output, as show in the example below.

btrfs fi show
Label: none  uuid: 17f7d403-17d7-4f0a-b8ba-de673fdd3f56
	Total devices 2 FS bytes used 15.88MiB
	devid    1 size 2.00GiB used 417.50MiB path /dev/sdc
	devid    2 size 2.00GiB used 417.50MiB path /dev/sdd

Global spare
	device size 3.00GiB path /dev/sde

btrfs-progs v4.2.3-12-gb5f4b68

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 cmds-filesystem.c | 5 +++++
 utils.h           | 1 +
 2 files changed, 6 insertions(+)

diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 11d0406..651ffe4 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -920,6 +920,11 @@ devs_only:
 					struct btrfs_fs_devices, list);
 		free_fs_devices(fs_devices);
 	}
+
+	if (where == -1 && search == NULL) {
+		ret = print_spare_device(unit_mode);
+		printf("\n");
+	}
 out:
 	printf("%s\n", PACKAGE_STRING);
 	free_seen_fsid();
diff --git a/utils.h b/utils.h
index a84cf2d..b833390 100644
--- a/utils.h
+++ b/utils.h
@@ -271,5 +271,6 @@ const char *get_argv0_buf(void);
 
 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
 int is_numerical(const char *str);
+int print_spare_device(unsigned unit_mode);
 
 #endif
-- 
2.4.1

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