sd-netlink: make sd_netlink_slot take its description

22 files changed, 120 insertions, 73 deletions

diff --git a/src/core/loopback-setup.c b/src/core/loopback-setup.c
index d0585158c..f613db83c 100644
--- a/src/core/loopback-setup.c
+++ b/src/core/loopback-setup.c
@@ -53,7 +53,7 @@ static int start_loopback(sd_netlink *rtnl, struct state *s) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, LOOPBACK_SETUP_TIMEOUT_USEC);
+        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, LOOPBACK_SETUP_TIMEOUT_USEC, "systemd-start-loopback");
         if (r < 0)
                 return r;
 
@@ -88,7 +88,7 @@ static int add_ipv4_address(sd_netlink *rtnl, struct state *s) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, USEC_INFINITY);
+        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, USEC_INFINITY, "systemd-loopback-ipv4");
         if (r < 0)
                 return r;
 
@@ -123,7 +123,7 @@ static int add_ipv6_address(sd_netlink *rtnl, struct state *s) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, USEC_INFINITY);
+        r = sd_netlink_call_async(rtnl, NULL, req, generic_handler, NULL, s, USEC_INFINITY, "systemd-loopback-ipv6");
         if (r < 0)
                 return r;
 
diff --git a/src/libsystemd/sd-netlink/netlink-internal.h b/src/libsystemd/sd-netlink/netlink-internal.h
index d7fccad87..98de4f0a8 100644
--- a/src/libsystemd/sd-netlink/netlink-internal.h
+++ b/src/libsystemd/sd-netlink/netlink-internal.h
@@ -45,6 +45,7 @@ struct sd_netlink_slot {
         NetlinkSlotType type:2;
 
         bool floating:1;
+        char *description;
 
         LIST_FIELDS(sd_netlink_slot, slots);
 
diff --git a/src/libsystemd/sd-netlink/netlink-slot.c b/src/libsystemd/sd-netlink/netlink-slot.c
index ecd34c2bc..ed136d03d 100644
--- a/src/libsystemd/sd-netlink/netlink-slot.c
+++ b/src/libsystemd/sd-netlink/netlink-slot.c
@@ -7,22 +7,26 @@
 #include "alloc-util.h"
 #include "netlink-internal.h"
 #include "netlink-slot.h"
+#include "string-util.h"
 
-sd_netlink_slot *netlink_slot_allocate(
+int netlink_slot_allocate(
                 sd_netlink *nl,
                 bool floating,
                 NetlinkSlotType type,
                 size_t extra,
                 sd_netlink_destroy_t destroy_callback,
-                void *userdata) {
+                void *userdata,
+                const char *description,
+                sd_netlink_slot **ret) {
 
-        sd_netlink_slot *slot;
+        _cleanup_free_ sd_netlink_slot *slot = NULL;
 
         assert(nl);
+        assert(ret);
 
         slot = malloc0(offsetof(sd_netlink_slot, reply_callback) + extra);
         if (!slot)
-                return NULL;
+                return -ENOMEM;
 
         slot->n_ref = 1;
         slot->netlink = nl;
@@ -31,12 +35,20 @@ sd_netlink_slot *netlink_slot_allocate(
         slot->type = type;
         slot->floating = floating;
 
+        if (description) {
+                slot->description = strdup(description);
+                if (!slot->description)
+                        return -ENOMEM;
+        }
+
         if (!floating)
                 sd_netlink_ref(nl);
 
         LIST_PREPEND(slots, nl->slots, slot);
 
-        return slot;
+        *ret = TAKE_PTR(slot);
+
+        return 0;
 }
 
 void netlink_slot_disconnect(sd_netlink_slot *slot, bool unref) {
@@ -103,6 +115,7 @@ static sd_netlink_slot* netlink_slot_free(sd_netlink_slot *slot) {
         if (slot->destroy_callback)
                 slot->destroy_callback(slot->userdata);
 
+        free(slot->description);
         return mfree(slot);
 }
 
@@ -174,3 +187,18 @@ int sd_netlink_slot_set_floating(sd_netlink_slot *slot, int b) {
 
         return 1;
 }
+
+int sd_netlink_slot_get_description(sd_netlink_slot *slot, const char **description) {
+        assert_return(slot, -EINVAL);
+
+        if (description)
+                *description = slot->description;
+
+        return !!slot->description;
+}
+
+int sd_netlink_slot_set_description(sd_netlink_slot *slot, const char *description) {
+        assert_return(slot, -EINVAL);
+
+        return free_and_strdup(&slot->description, description);
+}
diff --git a/src/libsystemd/sd-netlink/netlink-slot.h b/src/libsystemd/sd-netlink/netlink-slot.h
index d7d084a20..e57d61921 100644
--- a/src/libsystemd/sd-netlink/netlink-slot.h
+++ b/src/libsystemd/sd-netlink/netlink-slot.h
@@ -3,11 +3,13 @@
 
 #include "sd-netlink.h"
 
-sd_netlink_slot *netlink_slot_allocate(
+int netlink_slot_allocate(
                 sd_netlink *nl,
                 bool floating,
                 NetlinkSlotType type,
                 size_t extra,
                 sd_netlink_destroy_t destroy_callback,
-                void *userdata);
+                void *userdata,
+                const char *description,
+                sd_netlink_slot **ret);
 void netlink_slot_disconnect(sd_netlink_slot *slot, bool unref);
diff --git a/src/libsystemd/sd-netlink/sd-netlink.c b/src/libsystemd/sd-netlink/sd-netlink.c
index 9484446ca..7b497d1cc 100644
--- a/src/libsystemd/sd-netlink/sd-netlink.c
+++ b/src/libsystemd/sd-netlink/sd-netlink.c
@@ -15,6 +15,7 @@
 #include "netlink-util.h"
 #include "process-util.h"
 #include "socket-util.h"
+#include "string-util.h"
 #include "util.h"
 
 static int sd_netlink_new(sd_netlink **ret) {
@@ -303,7 +304,10 @@ static int process_timeout(sd_netlink *rtnl) {
 
         r = c->callback(rtnl, m, slot->userdata);
         if (r < 0)
-                log_debug_errno(r, "sd-netlink: timedout callback failed: %m");
+                log_debug_errno(r, "sd-netlink: timedout callback %s%s%sfailed: %m",
+                                slot->description ? "'" : "",
+                                strempty(slot->description),
+                                slot->description ? "' " : "");
 
         if (slot->floating)
                 netlink_slot_disconnect(slot, true);
@@ -342,7 +346,10 @@ static int process_reply(sd_netlink *rtnl, sd_netlink_message *m) {
 
         r = c->callback(rtnl, m, slot->userdata);
         if (r < 0)
-                log_debug_errno(r, "sd-netlink: callback failed: %m");
+                log_debug_errno(r, "sd-netlink: reply callback %s%s%sfailed: %m",
+                                slot->description ? "'" : "",
+                                strempty(slot->description),
+                                slot->description ? "' " : "");
 
         if (slot->floating)
                 netlink_slot_disconnect(slot, true);
@@ -370,7 +377,10 @@ static int process_match(sd_netlink *rtnl, sd_netlink_message *m) {
                         r = c->callback(rtnl, m, slot->userdata);
                         if (r != 0) {
                                 if (r < 0)
-                                        log_debug_errno(r, "sd-netlink: match callback failed: %m");
+                                        log_debug_errno(r, "sd-netlink: match callback %s%s%sfailed: %m",
+                                                        slot->description ? "'" : "",
+                                                        strempty(slot->description),
+                                                        slot->description ? "' " : "");
 
                                 break;
                         }
@@ -519,7 +529,8 @@ int sd_netlink_call_async(
                 sd_netlink_message_handler_t callback,
                 sd_netlink_destroy_t destroy_callback,
                 void *userdata,
-                uint64_t usec) {
+                uint64_t usec,
+                const char *description) {
         _cleanup_free_ sd_netlink_slot *slot = NULL;
         uint32_t s;
         int r, k;
@@ -539,9 +550,9 @@ int sd_netlink_call_async(
                         return r;
         }
 
-        slot = netlink_slot_allocate(nl, !ret_slot, NETLINK_REPLY_CALLBACK, sizeof(struct reply_callback), destroy_callback, userdata);
-        if (!slot)
-                return -ENOMEM;
+        r = netlink_slot_allocate(nl, !ret_slot, NETLINK_REPLY_CALLBACK, sizeof(struct reply_callback), destroy_callback, userdata, description, &slot);
+        if (r < 0)
+                return r;
 
         slot->reply_callback.callback = callback;
         slot->reply_callback.timeout = calc_elapse(usec);
@@ -820,7 +831,8 @@ int sd_netlink_add_match(
                 uint16_t type,
                 sd_netlink_message_handler_t callback,
                 sd_netlink_destroy_t destroy_callback,
-                void *userdata) {
+                void *userdata,
+                const char *description) {
         _cleanup_free_ sd_netlink_slot *slot = NULL;
         int r;
 
@@ -828,9 +840,9 @@ int sd_netlink_add_match(
         assert_return(callback, -EINVAL);
         assert_return(!rtnl_pid_changed(rtnl), -ECHILD);
 
-        slot = netlink_slot_allocate(rtnl, !ret_slot, NETLINK_MATCH_CALLBACK, sizeof(struct match_callback), destroy_callback, userdata);
-        if (!slot)
-                return -ENOMEM;
+        r = netlink_slot_allocate(rtnl, !ret_slot, NETLINK_MATCH_CALLBACK, sizeof(struct match_callback), destroy_callback, userdata, description, &slot);
+        if (r < 0)
+                return r;
 
         slot->match_callback.callback = callback;
         slot->match_callback.type = type;
diff --git a/src/libsystemd/sd-netlink/test-netlink.c b/src/libsystemd/sd-netlink/test-netlink.c
index 5fffb7011..69f5d7873 100644
--- a/src/libsystemd/sd-netlink/test-netlink.c
+++ b/src/libsystemd/sd-netlink/test-netlink.c
@@ -201,7 +201,7 @@ static void test_event_loop(int ifindex) {
         assert_se(sd_netlink_open(&rtnl) >= 0);
         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 
-        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler, NULL, ifname, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler, NULL, ifname, 0, NULL) >= 0);
 
         assert_se(sd_event_default(&event) >= 0);
 
@@ -227,7 +227,7 @@ static void test_async(int ifindex) {
 
         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
 
-        assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler, NULL, ifname, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler, NULL, ifname, 0, NULL) >= 0);
 
         assert_se(sd_netlink_wait(rtnl, 0) >= 0);
         assert_se(sd_netlink_process(rtnl, &r) >= 0);
@@ -293,7 +293,7 @@ static void test_async_destroy_callback(int ifindex) {
 
         /* destroy callback is called after processing message */
         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
-        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 
         assert_se(t->n_ref == 1);
         assert_se(test_async_object_ref(t));
@@ -307,7 +307,7 @@ static void test_async_destroy_callback(int ifindex) {
 
         /* destroy callback is called when asynchronous call is cancelled, that is, slot is freed. */
         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
-        assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler2, test_async_object_destroy, t, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, &slot, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 
         assert_se(t->n_ref == 1);
         assert_se(test_async_object_ref(t));
@@ -320,7 +320,7 @@ static void test_async_destroy_callback(int ifindex) {
 
         /* destroy callback is also called by sd_netlink_unref() */
         assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
-        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, NULL, m, link_handler2, test_async_object_destroy, t, 0, NULL) >= 0);
 
         assert_se(t->n_ref == 1);
         assert_se(test_async_object_ref(t));
@@ -356,10 +356,10 @@ static void test_pipe(int ifindex) {
         assert_se(sd_rtnl_message_new_link(rtnl, &m2, RTM_GETLINK, ifindex) >= 0);
 
         counter++;
-        assert_se(sd_netlink_call_async(rtnl, NULL, m1, pipe_handler, NULL, &counter, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, NULL, m1, pipe_handler, NULL, &counter, 0, NULL) >= 0);
 
         counter++;
-        assert_se(sd_netlink_call_async(rtnl, NULL, m2, pipe_handler, NULL, &counter, 0) >= 0);
+        assert_se(sd_netlink_call_async(rtnl, NULL, m2, pipe_handler, NULL, &counter, 0, NULL) >= 0);
 
         while (counter > 0) {
                 assert_se(sd_netlink_wait(rtnl, 0) >= 0);
@@ -410,9 +410,9 @@ static void test_match(void) {
 
         assert_se(sd_netlink_open(&rtnl) >= 0);
 
-        assert_se(sd_netlink_add_match(rtnl, &s1, RTM_NEWLINK, link_handler, NULL, NULL) >= 0);
-        assert_se(sd_netlink_add_match(rtnl, &s2, RTM_NEWLINK, link_handler, NULL, NULL) >= 0);
-        assert_se(sd_netlink_add_match(rtnl, NULL, RTM_NEWLINK, link_handler, NULL, NULL) >= 0);
+        assert_se(sd_netlink_add_match(rtnl, &s1, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
+        assert_se(sd_netlink_add_match(rtnl, &s2, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
+        assert_se(sd_netlink_add_match(rtnl, NULL, RTM_NEWLINK, link_handler, NULL, NULL, NULL) >= 0);
 
         assert_se(!(s1 = sd_netlink_slot_unref(s1)));
         assert_se(!(s2 = sd_netlink_slot_unref(s2)));
diff --git a/src/network/netdev/bridge.c b/src/network/netdev/bridge.c
index 604a5e3f5..5a462f837 100644
--- a/src/network/netdev/bridge.c
+++ b/src/network/netdev/bridge.c
@@ -130,7 +130,7 @@ static int netdev_bridge_post_create(NetDev *netdev, Link *link, sd_netlink_mess
                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
 
         r = sd_netlink_call_async(netdev->manager->rtnl, NULL, req, netdev_bridge_set_handler,
-                                  netdev_netlink_destroy_callback, netdev, 0);
+                                  netdev_netlink_destroy_callback, netdev, 0, __func__);
         if (r < 0)
                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/netdev/geneve.c b/src/network/netdev/geneve.c
index e7c8afd93..e407a8fc5 100644
--- a/src/network/netdev/geneve.c
+++ b/src/network/netdev/geneve.c
@@ -137,7 +137,7 @@ static int netdev_geneve_create(NetDev *netdev) {
                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
 
         r = sd_netlink_call_async(netdev->manager->rtnl, NULL, m, geneve_netdev_create_handler,
-                                  netdev_netlink_destroy_callback, netdev, 0);
+                                  netdev_netlink_destroy_callback, netdev, 0, __func__);
         if (r < 0)
                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/netdev/netdev.c b/src/network/netdev/netdev.c
index 023cc922d..6eb63355a 100644
--- a/src/network/netdev/netdev.c
+++ b/src/network/netdev/netdev.c
@@ -226,7 +226,7 @@ static int netdev_enslave_ready(NetDev *netdev, Link* link, sd_netlink_message_h
                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MASTER attribute: %m");
 
         r = sd_netlink_call_async(netdev->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 
@@ -535,14 +535,14 @@ static int netdev_create(NetDev *netdev, Link *link,
 
                 if (link) {
                         r = sd_netlink_call_async(netdev->manager->rtnl, NULL, m, callback,
-                                                  link_netlink_destroy_callback, link, 0);
+                                                  link_netlink_destroy_callback, link, 0, __func__);
                         if (r < 0)
                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 
                         link_ref(link);
                 } else {
                         r = sd_netlink_call_async(netdev->manager->rtnl, NULL, m, netdev_create_handler,
-                                                  netdev_netlink_destroy_callback, netdev, 0);
+                                                  netdev_netlink_destroy_callback, netdev, 0, __func__);
                         if (r < 0)
                                 return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-address-label.c b/src/network/networkd-address-label.c
index 6265701e3..98e40d3f6 100644
--- a/src/network/networkd-address-label.c
+++ b/src/network/networkd-address-label.c
@@ -113,7 +113,7 @@ int address_label_configure(
                 return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index f2fae866e..cf33563bd 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -454,7 +454,7 @@ int address_remove(
                 return log_error_errno(r, "Could not append IFA_LOCAL attribute: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
@@ -633,7 +633,7 @@ int address_configure(
                 return r;
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0) {
                 address_release(address);
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
diff --git a/src/network/networkd-brvlan.c b/src/network/networkd-brvlan.c
index 32e854703..c7ca57d5e 100644
--- a/src/network/networkd-brvlan.c
+++ b/src/network/networkd-brvlan.c
@@ -196,7 +196,7 @@ int br_vlan_configure(Link *link, uint16_t pvid, uint32_t *br_vid_bitmap, uint32
 
         /* send message to the kernel */
         r = sd_netlink_call_async(rtnl, NULL, req, set_brvlan_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-fdb.c b/src/network/networkd-fdb.c
index 337ff2e6a..694065e3d 100644
--- a/src/network/networkd-fdb.c
+++ b/src/network/networkd-fdb.c
@@ -135,7 +135,7 @@ int fdb_entry_configure(Link *link, FdbEntry *fdb_entry) {
 
         /* send message to the kernel to update its internal static MAC table. */
         r = sd_netlink_call_async(rtnl, NULL, req, set_fdb_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-ipv6-proxy-ndp.c b/src/network/networkd-ipv6-proxy-ndp.c
index 11e1b8421..c4e209114 100644
--- a/src/network/networkd-ipv6-proxy-ndp.c
+++ b/src/network/networkd-ipv6-proxy-ndp.c
@@ -174,7 +174,7 @@ int ipv6_proxy_ndp_address_configure(Link *link, IPv6ProxyNDPAddress *ipv6_proxy
                 return rtnl_log_create_error(r);
 
         r = sd_netlink_call_async(rtnl, NULL, req, set_ipv6_proxy_ndp_address_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index e160d75a6..f4ab8aadb 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1341,7 +1341,7 @@ int link_set_mtu(Link *link, uint32_t mtu) {
                 return log_link_error_errno(link, r, "Could not append MTU: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -1412,7 +1412,7 @@ static int link_set_flags(Link *link) {
                 return log_link_error_errno(link, r, "Could not set link flags: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -1488,7 +1488,7 @@ static int link_set_bridge(Link *link) {
                 return log_link_error_errno(link, r, "Could not append IFLA_LINKINFO attribute: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_set_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -1541,7 +1541,7 @@ static int link_bond_set(Link *link) {
                 return log_link_error_errno(link, r, "Could not append IFLA_INFO_DATA attribute: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r,  "Could not send rtnetlink message: %m");
 
@@ -1834,7 +1834,7 @@ int link_up(Link *link) {
                 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -1860,7 +1860,7 @@ static int link_up_can(Link *link) {
                 return log_link_error_errno(link, r, "Could not set link flags: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -1950,7 +1950,7 @@ static int link_set_can(Link *link) {
                 return log_link_error_errno(link, r, "Failed to close netlink container: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, m, link_set_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -2008,7 +2008,7 @@ int link_down(Link *link) {
                 return log_link_error_errno(link, r, "Could not set link flags: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_down_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
 
@@ -3123,7 +3123,7 @@ int link_initialized(Link *link, sd_device *device) {
                 return r;
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return r;
 
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 8c6698629..7fae143f3 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -930,35 +930,35 @@ static int manager_connect_rtnl(Manager *m) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, &manager_rtnl_process_link, NULL, m, "network-rtnl_process_link");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, &manager_rtnl_process_address, NULL, m, "network-rtnl_process_address");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELROUTE, &manager_rtnl_process_route, NULL, m, "network-rtnl_process_route");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELRULE, &manager_rtnl_process_rule, NULL, m, "network-rtnl_process_rule");
         if (r < 0)
                 return r;
 
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index 591fae6e7..33389676c 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -440,7 +440,7 @@ int route_remove(Route *route, Link *link,
         }
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
@@ -621,7 +621,7 @@ int route_configure(
                 return log_error_errno(r, "Could not append RTA_METRICS attribute: %m");
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/networkd-routing-policy-rule.c b/src/network/networkd-routing-policy-rule.c
index fe393856f..28a2a0fcb 100644
--- a/src/network/networkd-routing-policy-rule.c
+++ b/src/network/networkd-routing-policy-rule.c
@@ -371,7 +371,7 @@ int routing_policy_rule_remove(RoutingPolicyRule *routing_policy_rule, Link *lin
         }
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, m, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
@@ -540,7 +540,7 @@ int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link, sd_netlin
         rule->link = link;
 
         r = sd_netlink_call_async(link->manager->rtnl, NULL, m, callback,
-                                  link_netlink_destroy_callback, link, 0);
+                                  link_netlink_destroy_callback, link, 0, __func__);
         if (r < 0)
                 return log_error_errno(r, "Could not send rtnetlink message: %m");
 
diff --git a/src/network/wait-online/manager.c b/src/network/wait-online/manager.c
index 22252ef82..0dfe7482f 100644
--- a/src/network/wait-online/manager.c
+++ b/src/network/wait-online/manager.c
@@ -169,11 +169,11 @@ static int manager_rtnl_listen(Manager *m) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, on_rtnl_event, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, on_rtnl_event, NULL, m, "wait-online-on-NEWLINK");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, on_rtnl_event, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, on_rtnl_event, NULL, m, "wait-online-on-DELLINK");
         if (r < 0)
                 return r;
 
diff --git a/src/nspawn/nspawn-expose-ports.c b/src/nspawn/nspawn-expose-ports.c
index 0eaf0ca5f..13ce8490a 100644
--- a/src/nspawn/nspawn-expose-ports.c
+++ b/src/nspawn/nspawn-expose-ports.c
@@ -209,11 +209,11 @@ int expose_port_watch_rtnl(
                 return log_error_errno(r, "Failed to create rtnl object: %m");
         }
 
-        r = sd_netlink_add_match(rtnl, NULL, RTM_NEWADDR, handler, NULL, exposed);
+        r = sd_netlink_add_match(rtnl, NULL, RTM_NEWADDR, handler, NULL, exposed, "nspawn-NEWADDR");
         if (r < 0)
                 return log_error_errno(r, "Failed to subscribe to RTM_NEWADDR messages: %m");
 
-        r = sd_netlink_add_match(rtnl, NULL, RTM_DELADDR, handler, NULL, exposed);
+        r = sd_netlink_add_match(rtnl, NULL, RTM_DELADDR, handler, NULL, exposed, "nspawn-DELADDR");
         if (r < 0)
                 return log_error_errno(r, "Failed to subscribe to RTM_DELADDR messages: %m");
 
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index 05244499c..8e564216e 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -200,19 +200,19 @@ static int manager_rtnl_listen(Manager *m) {
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, manager_process_link, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWLINK, manager_process_link, NULL, m, "resolve-NEWLINK");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, manager_process_link, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELLINK, manager_process_link, NULL, m, "resolve-DELLINK");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, manager_process_address, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_NEWADDR, manager_process_address, NULL, m, "resolve-NEWADDR");
         if (r < 0)
                 return r;
 
-        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, manager_process_address, NULL, m);
+        r = sd_netlink_add_match(m->rtnl, NULL, RTM_DELADDR, manager_process_address, NULL, m, "resolve-DELADDR");
         if (r < 0)
                 return r;
 
diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index 90c679b84..276953eb8 100644
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -53,7 +53,7 @@ sd_netlink *sd_netlink_unref(sd_netlink *nl);
 int sd_netlink_send(sd_netlink *nl, sd_netlink_message *message, uint32_t *serial);
 int sd_netlink_call_async(sd_netlink *nl, sd_netlink_slot **ret_slot, sd_netlink_message *message,
                           sd_netlink_message_handler_t callback, sd_netlink_destroy_t destoy_callback,
-                          void *userdata, uint64_t usec);
+                          void *userdata, uint64_t usec, const char *description);
 int sd_netlink_call(sd_netlink *nl, sd_netlink_message *message, uint64_t timeout,
                     sd_netlink_message **reply);
 
@@ -64,7 +64,8 @@ int sd_netlink_wait(sd_netlink *nl, uint64_t timeout);
 
 int sd_netlink_add_match(sd_netlink *nl, sd_netlink_slot **ret_slot, uint16_t match,
                          sd_netlink_message_handler_t callback,
-                         sd_netlink_destroy_t destroy_callback, void *userdata);
+                         sd_netlink_destroy_t destroy_callback,
+                         void *userdata, const char *description);
 
 int sd_netlink_attach_event(sd_netlink *nl, sd_event *e, int64_t priority);
 int sd_netlink_detach_event(sd_netlink *nl);
@@ -193,6 +194,9 @@ int sd_netlink_slot_get_destroy_callback(sd_netlink_slot *slot, sd_netlink_destr
 int sd_netlink_slot_set_destroy_callback(sd_netlink_slot *slot, sd_netlink_destroy_t callback);
 int sd_netlink_slot_get_floating(sd_netlink_slot *slot);
 int sd_netlink_slot_set_floating(sd_netlink_slot *slot, int b);
+int sd_netlink_slot_get_description(sd_netlink_slot *slot, const char **description);
+int sd_netlink_slot_set_description(sd_netlink_slot *slot, const char *description);
+
 
 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_netlink, sd_netlink_unref);
 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_netlink_message, sd_netlink_message_unref);