networkctl: Add support to display qdisc

./networkctl status ens38                                                                                                                                                                ─╯
● 4: ens38
             Link File: /usr/lib/systemd/network/99-default.link
          Network File: /usr/lib/systemd/network/10-ens38.network
                  Type: ether
                 State: routable (configured)
     Alternative Names: enp2s6
                  Path: pci-0000:02:06.0
                Driver: e1000
                Vendor: Intel Corporation
                 Model: 82545EM Gigabit Ethernet Controller (Copper) (PRO/1000 MT Single Port Adapter)
            HW Address: 00:0c:29:d2:42:7c (VMware, Inc.)
                   MTU: 1500 (min: 46, max: 16110)
                 QDisc: fq_codel        <============================
  Queue Length (Tx/Rx): 1/1
      Auto negotiation: yes
                 Speed: 1Gbps
                Duplex: full
                  Port: tp
               Address: 192.168.5.123
                        fe80::20c:29ff:fed2:427c

diff --git a/src/network/networkctl.c b/src/network/networkctl.c
index 880917a84421ae51f27d6fef7559a0c65ba5ddd0..70adf4c73bb2ff4887060f7aff92f389c5539427 100644 (file)
--- a/src/network/networkctl.c
+++ b/src/network/networkctl.c
@@ -125,6 +125,7 @@ typedef struct LinkInfo {
         uint32_t max_mtu;
         uint32_t tx_queues;
         uint32_t rx_queues;
+        char *qdisc;
         char **alternative_names;
 
         union {
@@ -179,6 +180,7 @@ static const LinkInfo* link_info_array_free(LinkInfo *array) {
         for (unsigned i = 0; array && array[i].needs_freeing; i++) {
                 sd_device_unref(array[i].sd_device);
                 free(array[i].ssid);
+                free(array[i].qdisc);
                 strv_free(array[i].alternative_names);
         }
 
@@ -249,7 +251,7 @@ static int decode_netdev(sd_netlink_message *m, LinkInfo *info) {
 
 static int decode_link(sd_netlink_message *m, LinkInfo *info, char **patterns, bool matched_patterns[]) {
         _cleanup_strv_free_ char **altnames = NULL;
-        const char *name;
+        const char *name, *qdisc;
         int ifindex, r;
         uint16_t type;
 
@@ -333,6 +335,13 @@ static int decode_link(sd_netlink_message *m, LinkInfo *info, char **patterns, b
         else if (sd_netlink_message_read(m, IFLA_STATS, sizeof info->stats, &info->stats) >= 0)
                 info->has_stats = true;
 
+        r = sd_netlink_message_read_string(m, IFLA_QDISC, &qdisc);
+        if (r >= 0) {
+                info->qdisc = strdup(qdisc);
+                if (!info->qdisc)
+                        return log_oom();
+        }
+
         /* fill kind info */
         (void) decode_netdev(m, info);
 
@@ -1336,6 +1345,15 @@ static int link_status_one(
                         return table_log_add_error(r);
         }
 
+        if (info->qdisc) {
+                r = table_add_many(table,
+                                   TABLE_EMPTY,
+                                   TABLE_STRING, "QDisc:",
+                                   TABLE_STRING, info->qdisc);
+                if (r < 0)
+                        return table_log_add_error(r);
+        }
+
         if (streq_ptr(info->netdev_kind, "bridge")) {
                 r = table_add_many(table,
                                    TABLE_EMPTY,