[PATCH 5/6] btrfs-progs: Added json output format for cmd_scrub_status

[Racz Zoltan <racz.zoli@gmail.com>]

---
 cmds/scrub.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/cmds/scrub.c b/cmds/scrub.c
index 1f3f032f..e47c1869 100644
--- a/cmds/scrub.c
+++ b/cmds/scrub.c
@@ -1991,6 +1991,8 @@ static int cmd_scrub_status(const struct cmd_struct *cmd, int argc, char **argv)
 	int fdres = -1;
 	int err = 0;
 
+	const bool json_output = (bconf.output_format == CMD_FORMAT_JSON);
+
 	unit_mode = get_unit_mode_from_arg(&argc, argv, 0);
 
 	optind = 0;
@@ -2069,9 +2071,18 @@ static int cmd_scrub_status(const struct cmd_struct *cmd, int argc, char **argv)
 	}
 	in_progress = is_scrub_running_in_kernel(fdmnt, di_args, fi_args.num_devices);
 
-	pr_verbose(LOG_DEFAULT, "UUID:             %s\n", fsid);
+
+	if (json_output) {
+		fmt_start(&fctx, scrub_status_rowspec, 1, 0);
+		fmt_print_start_group(&fctx, "scrub-status", JSON_TYPE_MAP);
+		fmt_print(&fctx, "uuid", fsid);
+	} else 
+		pr_verbose(LOG_DEFAULT, "UUID:             %s\n", fsid);
 
 	if (do_stats_per_dev) {
+		if (json_output) 
+			fmt_print_start_group(&fctx, "devices", JSON_TYPE_ARRAY);
+
 		for (i = 0; i < fi_args.num_devices; ++i) {
 			u64 limit;
 
@@ -2089,6 +2100,10 @@ static int cmd_scrub_status(const struct cmd_struct *cmd, int argc, char **argv)
 							"history" : "status",
 					&last_scrub->stats, limit);
 		}
+
+		if (json_output) 
+			fmt_print_end_group(&fctx, "devices");
+
 	} else {
 		u64 total_bytes_used = 0;
 		struct btrfs_ioctl_space_info *sp = si_args->spaces;
@@ -2116,10 +2131,16 @@ static int cmd_scrub_status(const struct cmd_struct *cmd, int argc, char **argv)
 			/* This is still slightly off for RAID56 */
 			total_bytes_used += sp->used_bytes * factor;
 		}
+
 		print_fs_stat(&fs_stat, print_raw, total_bytes_used,
 			      fi_args.num_devices, limit);
 	}
 
+	if (json_output) {
+		fmt_print_end_group(&fctx, "scrub-status");
+		fmt_end(&fctx);
+	}
+
 out:
 	free_history(past_scrubs);
 	free(di_args);
@@ -2130,7 +2151,7 @@ out:
 
 	return !!err;
 }
-static DEFINE_SIMPLE_COMMAND(scrub_status, "status");
+static DEFINE_COMMAND_WITH_FLAGS(scrub_status, "status", CMD_FORMAT_JSON);
 
 static const char * const cmd_scrub_limit_usage[] = {
 	"btrfs scrub limit [options] <path>",
-- 
2.48.1