[PATCH 4/6] btrfs-progs: Added json output format for _print_scrub_ss and print_scrub_dev

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

---
 cmds/scrub.c | 79 +++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 59 insertions(+), 20 deletions(-)

diff --git a/cmds/scrub.c b/cmds/scrub.c
index 5c05d00f..1f3f032f 100644
--- a/cmds/scrub.c
+++ b/cmds/scrub.c
@@ -403,32 +403,61 @@ static void _print_scrub_ss(struct scrub_stats *ss)
 	struct tm tm;
 	time_t seconds;
 	unsigned hours;
+	char *status;
+
+	const bool json_output = (bconf.output_format == CMD_FORMAT_JSON);
 
 	if (!ss || !ss->t_start) {
-		pr_verbose(LOG_DEFAULT, "\tno stats available\n");
+		if (!json_output)
+			pr_verbose(LOG_DEFAULT, "\tno stats available\n");
+		
 		return;
 	}
+
+	if (json_output)
+		fmt_print_start_group(&fctx, "info", JSON_TYPE_MAP);
+
 	if (ss->t_resumed) {
-		localtime_r(&ss->t_resumed, &tm);
-		strftime(t, sizeof(t), "%c", &tm);
-		t[sizeof(t) - 1] = '\0';
-		pr_verbose(LOG_DEFAULT, "Scrub resumed:    %s\n", t);
+		if (json_output)
+			fmt_print(&fctx, "resumed-at", ss->t_resumed);
+		else {
+			localtime_r(&ss->t_resumed, &tm);
+			strftime(t, sizeof(t), "%c", &tm);
+			t[sizeof(t) - 1] = '\0';
+
+			pr_verbose(LOG_DEFAULT, "Scrub resumed:    %s\n", t);
+		}
 	} else {
-		localtime_r(&ss->t_start, &tm);
-		strftime(t, sizeof(t), "%c", &tm);
-		t[sizeof(t) - 1] = '\0';
-		pr_verbose(LOG_DEFAULT, "Scrub started:    %s\n", t);
-	}
-
-	seconds = ss->duration;
-	hours = ss->duration / (60 * 60);
-	gmtime_r(&seconds, &tm);
-	strftime(t, sizeof(t), "%M:%S", &tm);
-	pr_verbose(LOG_DEFAULT, "Status:           %s\n",
-			(ss->in_progress ? "running" :
+		if (json_output)
+			fmt_print(&fctx, "started-at", ss->t_start);
+		else {
+			localtime_r(&ss->t_start, &tm);
+			strftime(t, sizeof(t), "%c", &tm);
+			t[sizeof(t) - 1] = '\0';
+
+			pr_verbose(LOG_DEFAULT, "Scrub started:    %s\n", t);
+		}
+	}
+
+	status = (ss->in_progress ? "running" :
 			 (ss->canceled ? "aborted" :
-			  (ss->finished ? "finished" : "interrupted"))));
-	pr_verbose(LOG_DEFAULT, "Duration:         %u:%s\n", hours, t);
+			  (ss->finished ? "finished" : "interrupted")));
+	
+
+	if (json_output) {
+		fmt_print(&fctx, "status", status);
+		fmt_print(&fctx, "duration", ss->duration);
+		fmt_print_end_group(&fctx, "info");
+	} else {
+		seconds = ss->duration;
+		hours = ss->duration / (60 * 60);
+		gmtime_r(&seconds, &tm);
+		strftime(t, sizeof(t), "%M:%S", &tm);
+		
+		pr_verbose(LOG_DEFAULT, "Status:           %s\n", status);
+		pr_verbose(LOG_DEFAULT, "Duration:         %u:%s\n", hours, t);
+	}
+
 }
 
 static void print_scrub_dev(struct btrfs_ioctl_dev_info_args *di,
@@ -436,7 +465,14 @@ static void print_scrub_dev(struct btrfs_ioctl_dev_info_args *di,
 				const char *append, struct scrub_stats *ss,
 				u64 limit)
 {
-	pr_verbose(LOG_DEFAULT, "\nScrub device %s (id %llu) %s\n", di->path, di->devid,
+	const bool json_output = (bconf.output_format == CMD_FORMAT_JSON);
+
+	if (json_output) {
+		fmt_print_start_group(&fctx, "device", JSON_TYPE_MAP);
+		fmt_print(&fctx, "dev", di->path);
+		fmt_print(&fctx, "id", di->devid);
+	} else 	
+		pr_verbose(LOG_DEFAULT, "\nScrub device %s (id %llu) %s\n", di->path, di->devid,
 	       append ? append : "");
 
 	_print_scrub_ss(ss);
@@ -461,6 +497,9 @@ static void print_scrub_dev(struct btrfs_ioctl_dev_info_args *di,
 			print_scrub_summary(p, ss, di->bytes_used, limit);
 		}
 	}
+
+	if (json_output) 
+		fmt_print_end_group(&fctx, "device");
 }
 
 /*
-- 
2.48.1