nvme-print-json: Add json_zns_changed print function

Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>

diff --git a/nvme-print-json.c b/nvme-print-json.c
index 440102559acf0cec5dc15c36daeafab8a35e3ff6..634e66f9631fe4a15424ad87f6283033a07345e5 100644 (file)
--- a/nvme-print-json.c
+++ b/nvme-print-json.c
@@ -26,6 +26,7 @@
 #define root_add_result(v) obj_add_result(root, v)
 #define root_add_str(k, v) json_object_add_value_string(root, k, v)
 #define root_add_uint(k, v) json_object_add_value_uint(root, k, v)
+#define root_add_uint64(k, v) json_object_add_value_uint64(root, k, v)
 #define root_add_uint_0x(k, v) obj_add_uint_0x(root, k, v)
 #define root_add_uint_x(k, v) obj_add_uint_x(root, k, v)
 
@@ -2496,6 +2497,26 @@ static void json_zns_start_zone_list(__u64 nr_zones, struct json_object **zone_l
        *zone_list = json_create_array();
 }
 
+static void json_zns_changed(struct nvme_zns_changed_zone_log *log)
+{
+       struct json_object *root = json_create_object();
+       char json_str[STR_LEN];
+       uint16_t nrzid = le16_to_cpu(log->nrzid);
+       int i;
+
+       if (nrzid == 0xFFFF) {
+               root_add_result("Too many zones have changed to fit into the log. Use report zones for changes.");
+       } else {
+               root_add_uint("nrzid", nrzid);
+               for (i = 0; i < nrzid; i++) {
+                       sprintf(json_str, "zid %03d", i);
+                       root_add_uint64(json_str, (uint64_t)le64_to_cpu(log->zid[i]));
+               }
+       }
+
+       json_print(root);
+}
+
 static void json_zns_finish_zone_list(__u64 nr_zones,
                                      struct json_object *zone_list)
 {
@@ -4150,7 +4171,7 @@ static struct print_ops json_print_ops = {
        .supported_cap_config_list_log  = json_supported_cap_config_log,
        .supported_log_pages            = json_support_log,
        .zns_start_zone_list            = json_zns_start_zone_list,
-       .zns_changed_zone_log           = NULL,
+       .zns_changed_zone_log           = json_zns_changed,
        .zns_finish_zone_list           = json_zns_finish_zone_list,
        .zns_id_ctrl                    = json_nvme_zns_id_ctrl,
        .zns_id_ns                      = json_nvme_zns_id_ns,