sd-network: introduce functions for new link and manager states

src/libsystemd/sd-network/sd-network.c

@@ -18,13 +18,13 @@
 #include "strv.h"
 #include "util.h"
 
-_public_ int sd_network_get_operational_state(char **state) {
+static int network_get_string(const char *field, char **ret) {
         _cleanup_free_ char *s = NULL;
         int r;
 
-        assert_return(state, -EINVAL);
+        assert_return(ret, -EINVAL);
 
-        r = parse_env_file(NULL, "/run/systemd/netif/state", "OPER_STATE", &s);
+        r = parse_env_file(NULL, "/run/systemd/netif/state", field, &s);
         if (r == -ENOENT)
                 return -ENODATA;
         if (r < 0)
@@ -32,11 +32,23 @@ _public_ int sd_network_get_operational_state(char **state) {
         if (isempty(s))
                 return -ENODATA;
 
-        *state = TAKE_PTR(s);
+        *ret = TAKE_PTR(s);
 
         return 0;
 }
 
+_public_ int sd_network_get_operational_state(char **state) {
+        return network_get_string("OPER_STATE", state);
+}
+
+_public_ int sd_network_get_carrier_state(char **state) {
+        return network_get_string("CARRIER_STATE", state);
+}
+
+_public_ int sd_network_get_address_state(char **state) {
+        return network_get_string("ADDRESS_STATE", state);
+}
+
 static int network_get_strv(const char *key, char ***ret) {
         _cleanup_strv_free_ char **a = NULL;
         _cleanup_free_ char *s = NULL;
@@ -149,6 +161,14 @@ _public_ int sd_network_link_get_operational_state(int ifindex, char **state) {
         return network_link_get_string(ifindex, "OPER_STATE", state);
 }
 
+_public_ int sd_network_link_get_carrier_state(int ifindex, char **state) {
+        return network_link_get_string(ifindex, "CARRIER_STATE", state);
+}
+
+_public_ int sd_network_link_get_address_state(int ifindex, char **state) {
+        return network_link_get_string(ifindex, "ADDRESS_STATE", state);
+}
+
 _public_ int sd_network_link_get_required_for_online(int ifindex) {
         _cleanup_free_ char *s = NULL;
         int r;

src/network/networkd-link.c

@@ -3607,7 +3607,7 @@ static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
 int link_save(Link *link) {
         _cleanup_free_ char *temp_path = NULL;
         _cleanup_fclose_ FILE *f = NULL;
-        const char *admin_state, *oper_state;
+        const char *admin_state, *oper_state, *carrier_state, *address_state;
         Address *a;
         Route *route;
         Iterator i;
@@ -3631,6 +3631,12 @@ int link_save(Link *link) {
         oper_state = link_operstate_to_string(link->operstate);
         assert(oper_state);
 
+        carrier_state = link_carrier_state_to_string(link->carrier_state);
+        assert(carrier_state);
+
+        address_state = link_address_state_to_string(link->address_state);
+        assert(address_state);
+
         r = fopen_temporary(link->state_file, &f, &temp_path);
         if (r < 0)
                 goto fail;
@@ -3640,8 +3646,10 @@ int link_save(Link *link) {
         fprintf(f,
                 "# This is private data. Do not parse.\n"
                 "ADMIN_STATE=%s\n"
-                "OPER_STATE=%s\n",
-                admin_state, oper_state);
+                "OPER_STATE=%s\n"
+                "CARRIER_STATE=%s\n"
+                "ADDRESS_STATE=%s\n",
+                admin_state, oper_state, carrier_state, address_state);
 
         if (link->network) {
                 char **dhcp6_domains = NULL, **dhcp_domains = NULL;

src/network/networkd-manager.c

@@ -1083,7 +1083,7 @@ static int manager_save(Manager *m) {
         LinkOperationalState operstate = LINK_OPERSTATE_OFF;
         LinkCarrierState carrier_state = LINK_CARRIER_STATE_OFF;
         LinkAddressState address_state = LINK_ADDRESS_STATE_OFF;
-        const char *operstate_str;
+        const char *operstate_str, *carrier_state_str, *address_state_str;
         int r;
 
         assert(m);
@@ -1196,6 +1196,12 @@ static int manager_save(Manager *m) {
         operstate_str = link_operstate_to_string(operstate);
         assert(operstate_str);
 
+        carrier_state_str = link_carrier_state_to_string(carrier_state);
+        assert(carrier_state_str);
+
+        address_state_str = link_address_state_to_string(address_state);
+        assert(address_state_str);
+
         r = fopen_temporary(m->state_file, &f, &temp_path);
         if (r < 0)
                 return r;
@@ -1204,7 +1210,10 @@ static int manager_save(Manager *m) {
 
         fprintf(f,
                 "# This is private data. Do not parse.\n"
-                "OPER_STATE=%s\n", operstate_str);
+                "OPER_STATE=%s\n"
+                "CARRIER_STATE=%s\n"
+                "ADDRESS_STATE=%s\n",
+                operstate_str, carrier_state_str, address_state_str);
 
         ordered_set_print(f, "DNS=", dns);
         ordered_set_print(f, "NTP=", ntp);

src/systemd/sd-network.h

@@ -49,6 +49,8 @@ _SD_BEGIN_DECLARATIONS;
  *   -ENODATA: networkd is not aware of any links
  */
 int sd_network_get_operational_state(char **state);
+int sd_network_get_carrier_state(char **state);
+int sd_network_get_address_state(char **state);
 
 /* Get DNS entries for all links. These are string representations of
  * IP addresses */
@@ -90,6 +92,8 @@ int sd_network_link_get_setup_state(int ifindex, char **state);
  */
 int sd_network_link_get_operational_state(int ifindex, char **state);
 int sd_network_link_get_required_operstate_for_online(int ifindex, char **state);
+int sd_network_link_get_carrier_state(int ifindex, char **state);
+int sd_network_link_get_address_state(int ifindex, char **state);
 
 /* Indicates whether the network is relevant to being online.
  * Possible return codes: