Merge pull request #16725 from yuwata/network-fix-ndisc-multiple-routers

network: fix NDisc behavior when multiple routers exist

man/systemd.exec.xml

@@ -1042,7 +1042,8 @@ CapabilityBoundingSet=~CAP_B CAP_C</programlisting>
 
         <listitem><para>Controls the NUMA node list which will be applied alongside with selected NUMA policy.
         Takes a list of NUMA nodes and has the same syntax as a list of CPUs for <varname>CPUAffinity=</varname>
-        option. Note that the list of NUMA nodes is not required for <option>default</option> and <option>local</option>
+        option or special "all" value which will include all available NUMA nodes in the mask. Note that the list
+        of NUMA nodes is not required for <option>default</option> and <option>local</option>
         policies and for <option>preferred</option> policy we expect a single NUMA node.</para></listitem>
       </varlistentry>
 

src/basic/in-addr-util.c

@@ -755,13 +755,13 @@ static int in_addr_data_compare_func(const struct in_addr_data *x, const struct
 
 DEFINE_HASH_OPS(in_addr_data_hash_ops, struct in_addr_data, in_addr_data_hash_func, in_addr_data_compare_func);
 
-static void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state) {
+void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state) {
         assert(addr);
 
         siphash24_compress(addr, sizeof(*addr), state);
 }
 
-static int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b) {
+int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b) {
         return memcmp(a, b, sizeof(*a));
 }
 

src/basic/in-addr-util.h

@@ -80,5 +80,8 @@ static inline size_t FAMILY_ADDRESS_SIZE(int family) {
  * See also oss-fuzz#11344. */
 #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
 
+void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state);
+int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b);
+
 extern const struct hash_ops in_addr_data_hash_ops;
 extern const struct hash_ops in6_addr_hash_ops;

src/core/load-fragment.c

@@ -1370,10 +1370,18 @@ int config_parse_numa_mask(const char *unit,
         assert(rvalue);
         assert(data);
 
-        r = parse_cpu_set_extend(rvalue, &p->nodes, true, unit, filename, line, lvalue);
-        if (r < 0) {
-                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse NUMA node mask, ignoring: %s", rvalue);
-                return 0;
+        if (streq(rvalue, "all")) {
+                r = numa_mask_add_all(&p->nodes);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to create NUMA mask representing \"all\" NUMA nodes, ignoring: %m");
+                        return 0;
+                }
+        } else {
+                r = parse_cpu_set_extend(rvalue, &p->nodes, true, unit, filename, line, lvalue);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse NUMA node mask, ignoring: %s", rvalue);
+                        return 0;
+                }
         }
 
         return r;

src/network/networkd-address.c

@@ -10,6 +10,7 @@
 #include "netlink-util.h"
 #include "networkd-address.h"
 #include "networkd-manager.h"
+#include "networkd-ndisc.h"
 #include "parse-util.h"
 #include "set.h"
 #include "socket-util.h"
@@ -123,6 +124,9 @@ void address_free(Address *address) {
         }
 
         if (address->link && !address->acd) {
+                NDiscAddress *n;
+                Iterator i;
+
                 set_remove(address->link->addresses, address);
                 set_remove(address->link->addresses_foreign, address);
                 set_remove(address->link->static_addresses, address);
@@ -134,8 +138,9 @@ void address_free(Address *address) {
                 set_remove(address->link->dhcp6_addresses_old, address);
                 set_remove(address->link->dhcp6_pd_addresses, address);
                 set_remove(address->link->dhcp6_pd_addresses_old, address);
-                set_remove(address->link->ndisc_addresses, address);
-                set_remove(address->link->ndisc_addresses_old, address);
+                SET_FOREACH(n, address->link->ndisc_addresses, i)
+                        if (n->address == address)
+                                free(set_remove(address->link->ndisc_addresses, n));
 
                 if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
                         memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
@@ -162,7 +167,7 @@ static uint32_t address_prefix(const Address *a) {
                 return be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
 }
 
-static void address_hash_func(const Address *a, struct siphash *state) {
+void address_hash_func(const Address *a, struct siphash *state) {
         assert(a);
 
         siphash24_compress(&a->family, sizeof(a->family), state);
@@ -187,7 +192,7 @@ static void address_hash_func(const Address *a, struct siphash *state) {
         }
 }
 
-static int address_compare_func(const Address *a1, const Address *a2) {
+int address_compare_func(const Address *a1, const Address *a2) {
         int r;
 
         r = CMP(a1->family, a2->family);

src/network/networkd-address.h

@@ -75,6 +75,8 @@ int generate_ipv6_eui_64_address(Link *link, struct in6_addr *ret);
 
 DEFINE_NETWORK_SECTION_FUNCTIONS(Address, address_free);
 
+void address_hash_func(const Address *a, struct siphash *state);
+int address_compare_func(const Address *a1, const Address *a2);
 extern const struct hash_ops address_hash_ops;
 
 CONFIG_PARSER_PROTOTYPE(config_parse_address);

src/network/networkd-link.c

@@ -720,7 +720,6 @@ static Link *link_free(Link *link) {
         link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
         link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
         link->ndisc_routes = set_free(link->ndisc_routes);
-        link->ndisc_routes_old = set_free(link->ndisc_routes_old);
 
         link->nexthops = set_free(link->nexthops);
         link->nexthops_foreign = set_free(link->nexthops_foreign);
@@ -736,7 +735,6 @@ static Link *link_free(Link *link) {
         link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
         link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
         link->ndisc_addresses = set_free(link->ndisc_addresses);
-        link->ndisc_addresses_old = set_free(link->ndisc_addresses_old);
 
         while ((address = link->pool_addresses)) {
                 LIST_REMOVE(addresses, link->pool_addresses, address);
@@ -1163,6 +1161,8 @@ void link_check_ready(Link *link) {
         }
 
         if (link_has_carrier(link) || !link->network->configure_without_carrier) {
+                bool has_ndisc_address = false;
+                NDiscAddress *n;
 
                 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
                         log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
@@ -1175,8 +1175,14 @@ void link_check_ready(Link *link) {
                         return;
                 }
 
+                SET_FOREACH(n, link->ndisc_addresses, i)
+                        if (!n->marked) {
+                                has_ndisc_address = true;
+                                break;
+                        }
+
                 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
-                    !link->dhcp_address && set_isempty(link->dhcp6_addresses) && set_isempty(link->ndisc_addresses) &&
+                    !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
                     !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
                         log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
                         return;

src/network/networkd-link.h

@@ -132,8 +132,8 @@ typedef struct Link {
         sd_ndisc *ndisc;
         Set *ndisc_rdnss;
         Set *ndisc_dnssl;
-        Set *ndisc_addresses, *ndisc_addresses_old;
-        Set *ndisc_routes, *ndisc_routes_old;
+        Set *ndisc_addresses;
+        Set *ndisc_routes;
         unsigned ndisc_addresses_messages;
         unsigned ndisc_routes_messages;
         bool ndisc_addresses_configured:1;

src/network/networkd-ndisc.c

@@ -35,79 +35,218 @@
 
 #define NDISC_APP_ID SD_ID128_MAKE(13,ac,81,a7,d5,3f,49,78,92,79,5d,0c,29,3a,bc,7e)
 
-static int ndisc_remove_old(Link *link, bool force);
+static int ndisc_remove_old_one(Link *link, const struct in6_addr *router, bool force);
 
 static int ndisc_address_callback(Address *address) {
-        Address *a;
+        struct in6_addr router = {};
+        NDiscAddress *n;
         Iterator i;
 
         assert(address);
         assert(address->link);
 
-        /* Make this called only once */
-        SET_FOREACH(a, address->link->ndisc_addresses, i)
-                a->callback = NULL;
+        SET_FOREACH(n, address->link->ndisc_addresses, i)
+                if (n->address == address) {
+                        router = n->router;
+                        break;
+                }
 
-        return ndisc_remove_old(address->link, true);
+        if (IN6_IS_ADDR_UNSPECIFIED(&router)) {
+                _cleanup_free_ char *buf = NULL;
+
+                (void) in_addr_to_string(address->family, &address->in_addr, &buf);
+                log_link_debug(address->link, "%s is called for %s/%u, but it is already removed, ignoring.",
+                               __func__, strna(buf), address->prefixlen);
+                return 0;
+        }
+
+        /* Make this called only once */
+        SET_FOREACH(n, address->link->ndisc_addresses, i)
+                if (IN6_ARE_ADDR_EQUAL(&n->router, &router))
+                        n->address->callback = NULL;
+
+        return ndisc_remove_old_one(address->link, &router, true);
 }
 
-static int ndisc_remove_old(Link *link, bool force) {
-        Address *address;
-        Route *route;
+static int ndisc_remove_old_one(Link *link, const struct in6_addr *router, bool force) {
+        NDiscAddress *na;
+        NDiscRoute *nr;
         NDiscDNSSL *dnssl;
         NDiscRDNSS *rdnss;
         Iterator i;
         int k, r = 0;
 
         assert(link);
+        assert(router);
 
         if (!force) {
-                bool set_callback = !set_isempty(link->ndisc_addresses);
+                bool set_callback = false;
 
                 if (!link->ndisc_addresses_configured || !link->ndisc_routes_configured)
                         return 0;
 
-                SET_FOREACH(address, link->ndisc_addresses, i)
-                        if (address_is_ready(address)) {
-                                set_callback = false;
+                SET_FOREACH(na, link->ndisc_addresses, i)
+                        if (!na->marked && IN6_ARE_ADDR_EQUAL(&na->router, router)) {
+                                set_callback = true;
                                 break;
                         }
 
+                if (set_callback)
+                        SET_FOREACH(na, link->ndisc_addresses, i)
+                                if (!na->marked && address_is_ready(na->address)) {
+                                        set_callback = false;
+                                        break;
+                                }
+
                 if (set_callback) {
-                        SET_FOREACH(address, link->ndisc_addresses, i)
-                                address->callback = ndisc_address_callback;
+                        SET_FOREACH(na, link->ndisc_addresses, i)
+                                if (!na->marked && IN6_ARE_ADDR_EQUAL(&na->router, router))
+                                        na->address->callback = ndisc_address_callback;
+
+                        if (DEBUG_LOGGING) {
+                                _cleanup_free_ char *buf = NULL;
+
+                                (void) in_addr_to_string(AF_INET6, (union in_addr_union *) router, &buf);
+                                log_link_debug(link, "No SLAAC address obtained from %s is ready. "
+                                               "The old NDisc information will be removed later.",
+                                               strna(buf));
+                        }
                         return 0;
                 }
         }
 
-        if (!set_isempty(link->ndisc_addresses_old) || !set_isempty(link->ndisc_routes_old))
-                log_link_debug(link, "Removing old NDisc addresses and routes.");
+        if (DEBUG_LOGGING) {
+                _cleanup_free_ char *buf = NULL;
+
+                (void) in_addr_to_string(AF_INET6, (union in_addr_union *) router, &buf);
+                log_link_debug(link, "Removing old NDisc information obtained from %s.", strna(buf));
+        }
 
         link_dirty(link);
 
-        SET_FOREACH(address, link->ndisc_addresses_old, i) {
-                k = address_remove(address, link, NULL);
-                if (k < 0)
-                        r = k;
-        }
+        SET_FOREACH(na, link->ndisc_addresses, i)
+                if (na->marked && IN6_ARE_ADDR_EQUAL(&na->router, router)) {
+                        k = address_remove(na->address, link, NULL);
+                        if (k < 0)
+                                r = k;
+                }
 
-        SET_FOREACH(route, link->ndisc_routes_old, i) {
-                k = route_remove(route, link, NULL);
-                if (k < 0)
-                        r = k;
-        }
+        SET_FOREACH(nr, link->ndisc_routes, i)
+                if (nr->marked && IN6_ARE_ADDR_EQUAL(&nr->router, router)) {
+                        k = route_remove(nr->route, link, NULL);
+                        if (k < 0)
+                                r = k;
+                }
 
         SET_FOREACH(rdnss, link->ndisc_rdnss, i)
-                if (rdnss->marked)
+                if (rdnss->marked && IN6_ARE_ADDR_EQUAL(&rdnss->router, router))
                         free(set_remove(link->ndisc_rdnss, rdnss));
 
         SET_FOREACH(dnssl, link->ndisc_dnssl, i)
-                if (dnssl->marked)
+                if (dnssl->marked && IN6_ARE_ADDR_EQUAL(&dnssl->router, router))
                         free(set_remove(link->ndisc_dnssl, dnssl));
 
         return r;
 }
 
+static int ndisc_remove_old(Link *link) {
+        _cleanup_set_free_free_ Set *routers = NULL;
+        _cleanup_free_ struct in6_addr *router = NULL;
+        struct in6_addr *a;
+        NDiscAddress *na;
+        NDiscRoute *nr;
+        NDiscDNSSL *dnssl;
+        NDiscRDNSS *rdnss;
+        Iterator i;
+        int k, r;
+
+        assert(link);
+
+        routers = set_new(&in6_addr_hash_ops);
+        if (!routers)
+                return -ENOMEM;
+
+        SET_FOREACH(na, link->ndisc_addresses, i)
+                if (!set_contains(routers, &na->router)) {
+                        router = newdup(struct in6_addr, &na->router, 1);
+                        if (!router)
+                                return -ENOMEM;
+
+                        r = set_put(routers, router);
+                        if (r < 0)
+                                return r;
+
+                        assert(r > 0);
+                        TAKE_PTR(router);
+                }
+
+        SET_FOREACH(nr, link->ndisc_routes, i)
+                if (!set_contains(routers, &nr->router)) {
+                        router = newdup(struct in6_addr, &nr->router, 1);
+                        if (!router)
+                                return -ENOMEM;
+
+                        r = set_put(routers, router);
+                        if (r < 0)
+                                return r;
+
+                        assert(r > 0);
+                        TAKE_PTR(router);
+                }
+
+        SET_FOREACH(rdnss, link->ndisc_rdnss, i)
+                if (!set_contains(routers, &rdnss->router)) {
+                        router = newdup(struct in6_addr, &rdnss->router, 1);
+                        if (!router)
+                                return -ENOMEM;
+
+                        r = set_put(routers, router);
+                        if (r < 0)
+                                return r;
+
+                        assert(r > 0);
+                        TAKE_PTR(router);
+                }
+
+        SET_FOREACH(dnssl, link->ndisc_dnssl, i)
+                if (!set_contains(routers, &dnssl->router)) {
+                        router = newdup(struct in6_addr, &dnssl->router, 1);
+                        if (!router)
+                                return -ENOMEM;
+
+                        r = set_put(routers, router);
+                        if (r < 0)
+                                return r;
+
+                        assert(r > 0);
+                        TAKE_PTR(router);
+                }
+
+        r = 0;
+        SET_FOREACH(a, routers, i) {
+                k = ndisc_remove_old_one(link, a, false);
+                if (k < 0)
+                        r = k;
+        }
+
+        return r;
+}
+
+static void ndisc_route_hash_func(const NDiscRoute *x, struct siphash *state) {
+        route_hash_func(x->route, state);
+}
+
+static int ndisc_route_compare_func(const NDiscRoute *a, const NDiscRoute *b) {
+        return route_compare_func(a->route, b->route);
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+                ndisc_route_hash_ops,
+                NDiscRoute,
+                ndisc_route_hash_func,
+                ndisc_route_compare_func,
+                free);
+
 static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
         int r;
 
@@ -130,7 +269,7 @@ static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *li
                 log_link_debug(link, "NDisc routes set.");
                 link->ndisc_routes_configured = true;
 
-                r = ndisc_remove_old(link, false);
+                r = ndisc_remove_old(link);
                 if (r < 0) {
                         link_enter_failed(link);
                         return 1;
@@ -142,6 +281,67 @@ static int ndisc_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *li
         return 1;
 }
 
+static int ndisc_route_configure(Route *route, Link *link, sd_ndisc_router *rt) {
+        _cleanup_free_ NDiscRoute *nr = NULL;
+        NDiscRoute *nr_exist;
+        struct in6_addr router;
+        Route *ret;
+        int r;
+
+        assert(route);
+        assert(link);
+        assert(rt);
+
+        r = route_configure(route, link, ndisc_route_handler, &ret);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to set NDisc route: %m");
+
+        link->ndisc_routes_messages++;
+
+        r = sd_ndisc_router_get_address(rt, &router);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to get router address from RA: %m");
+
+        nr = new(NDiscRoute, 1);
+        if (!nr)
+                return log_oom();
+
+        *nr = (NDiscRoute) {
+                .router = router,
+                .route = ret,
+        };
+
+        nr_exist = set_get(link->ndisc_routes, nr);
+        if (nr_exist) {
+                nr_exist->marked = false;
+                nr_exist->router = router;
+                return 0;
+        }
+
+        r = set_ensure_put(&link->ndisc_routes, &ndisc_route_hash_ops, nr);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to store NDisc SLAAC route: %m");
+        assert(r > 0);
+        TAKE_PTR(nr);
+
+        return 0;
+}
+
+static void ndisc_address_hash_func(const NDiscAddress *x, struct siphash *state) {
+        address_hash_func(x->address, state);
+}
+
+static int ndisc_address_compare_func(const NDiscAddress *a, const NDiscAddress *b) {
+        return address_compare_func(a->address, b->address);
+}
+
+DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
+                ndisc_address_hash_ops,
+                NDiscAddress,
+                ndisc_address_hash_func,
+                ndisc_address_compare_func,
+                free);
+
 static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
         int r;
 
@@ -165,7 +365,7 @@ static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *
                 log_link_debug(link, "NDisc SLAAC addresses set.");
                 link->ndisc_addresses_configured = true;
 
-                r = ndisc_remove_old(link, false);
+                r = ndisc_remove_old(link);
                 if (r < 0) {
                         link_enter_failed(link);
                         return 1;
@@ -181,34 +381,16 @@ static int ndisc_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *
         return 1;
 }
 
-static int ndisc_route_configure(Route *route, Link *link) {
-        Route *ret;
-        int r;
-
-        assert(route);
-        assert(link);
-
-        r = route_configure(route, link, ndisc_route_handler, &ret);
-        if (r < 0)
-                return log_link_error_errno(link, r, "Failed to set NDisc route: %m");
-
-        link->ndisc_routes_messages++;
-
-        r = set_ensure_put(&link->ndisc_routes, &route_hash_ops, ret);
-        if (r < 0)
-                return log_link_error_errno(link, r, "Failed to store NDisc route: %m");
-
-        (void) set_remove(link->ndisc_routes_old, ret);
-
-        return 0;
-}
-
-static int ndisc_address_configure(Address *address, Link *link) {
+static int ndisc_address_configure(Address *address, Link *link, sd_ndisc_router *rt) {
+        _cleanup_free_ NDiscAddress *na = NULL;
+        NDiscAddress *na_exist;
+        struct in6_addr router;
         Address *ret;
         int r;
 
         assert(address);
         assert(link);
+        assert(rt);
 
         r = address_configure(address, link, ndisc_address_handler, true, &ret);
         if (r < 0)
@@ -216,11 +398,31 @@ static int ndisc_address_configure(Address *address, Link *link) {
 
         link->ndisc_addresses_messages++;
 
-        r = set_ensure_put(&link->ndisc_addresses, &address_hash_ops, ret);
+        r = sd_ndisc_router_get_address(rt, &router);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to get router address from RA: %m");
+
+        na = new(NDiscAddress, 1);
+        if (!na)
+                return log_oom();
+
+        *na = (NDiscAddress) {
+                .router = router,
+                .address = ret,
+        };
+
+        na_exist = set_get(link->ndisc_addresses, na);
+        if (na_exist) {
+                na_exist->marked = false;
+                na_exist->router = router;
+                return 0;
+        }
+
+        r = set_ensure_put(&link->ndisc_addresses, &ndisc_address_hash_ops, na);
         if (r < 0)
                 return log_link_error_errno(link, r, "Failed to store NDisc SLAAC address: %m");
-
-        (void) set_remove(link->ndisc_addresses_old, ret);
+        assert(r > 0);
+        TAKE_PTR(na);
 
         return 0;
 }
@@ -286,7 +488,7 @@ static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
         route->lifetime = time_now + lifetime * USEC_PER_SEC;
         route->mtu = mtu;
 
-        r = ndisc_route_configure(route, link);
+        r = ndisc_route_configure(route, link, rt);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not set default route: %m");
 
@@ -300,7 +502,7 @@ static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
 
                 route_gw->gw = gateway;
 
-                r = ndisc_route_configure(route_gw, link);
+                r = ndisc_route_configure(route_gw, link, rt);
                 if (r < 0)
                         return log_link_error_errno(link, r, "Could not set gateway: %m");
         }
@@ -514,7 +716,7 @@ static int ndisc_router_process_autonomous_prefix(Link *link, sd_ndisc_router *r
 
                 address->in_addr.in6 = *a;
 
-                r = ndisc_address_configure(address, link);
+                r = ndisc_address_configure(address, link, rt);
                 if (r < 0)
                         return log_link_error_errno(link, r, "Could not set SLAAC address: %m");
         }
@@ -560,7 +762,7 @@ static int ndisc_router_process_onlink_prefix(Link *link, sd_ndisc_router *rt) {
         if (r < 0)
                 return log_link_error_errno(link, r, "Failed to get prefix address: %m");
 
-        r = ndisc_route_configure(route, link);
+        r = ndisc_route_configure(route, link, rt);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not set prefix route: %m");;
 
@@ -617,7 +819,7 @@ static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
         if (r < 0)
                 return log_link_error_errno(link, r, "Failed to get route address: %m");
 
-        r = ndisc_route_configure(route, link);
+        r = ndisc_route_configure(route, link, rt);
         if (r < 0)
                 return log_link_error_errno(link, r, "Could not set additional route: %m");
 
@@ -642,6 +844,7 @@ DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
 static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
         uint32_t lifetime;
         const struct in6_addr *a;
+        struct in6_addr router;
         NDiscRDNSS *rdnss;
         usec_t time_now;
         Iterator i;
@@ -650,6 +853,10 @@ static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
         assert(link);
         assert(rt);
 
+        r = sd_ndisc_router_get_address(rt, &router);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to get router address from RA: %m");
+
         r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
         if (r < 0)
                 return log_link_error_errno(link, r, "Failed to get RA timestamp: %m");
@@ -663,7 +870,8 @@ static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
                 return log_link_error_errno(link, n, "Failed to get RDNSS addresses: %m");
 
         SET_FOREACH(rdnss, link->ndisc_rdnss, i)
-                rdnss->marked = true;
+                if (IN6_ARE_ADDR_EQUAL(&rdnss->router, &router))
+                        rdnss->marked = true;
 
         if (lifetime == 0)
                 return 0;
@@ -682,6 +890,7 @@ static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
                 rdnss = set_get(link->ndisc_rdnss, &d);
                 if (rdnss) {
                         rdnss->marked = false;
+                        rdnss->router = router;
                         rdnss->valid_until = time_now + lifetime * USEC_PER_SEC;
                         continue;
                 }
@@ -692,6 +901,7 @@ static int ndisc_router_process_rdnss(Link *link, sd_ndisc_router *rt) {
 
                 *x = (NDiscRDNSS) {
                         .address = a[j],
+                        .router = router,
                         .valid_until = time_now + lifetime * USEC_PER_SEC,
                 };
 
@@ -721,6 +931,7 @@ DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
 
 static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) {
         _cleanup_strv_free_ char **l = NULL;
+        struct in6_addr router;
         uint32_t lifetime;
         usec_t time_now;
         NDiscDNSSL *dnssl;
@@ -731,6 +942,10 @@ static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) {
         assert(link);
         assert(rt);
 
+        r = sd_ndisc_router_get_address(rt, &router);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to get router address from RA: %m");
+
         r = sd_ndisc_router_get_timestamp(rt, clock_boottime_or_monotonic(), &time_now);
         if (r < 0)
                 return log_link_error_errno(link, r, "Failed to get RA timestamp: %m");
@@ -744,7 +959,8 @@ static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) {
                 return log_link_error_errno(link, r, "Failed to get DNSSL addresses: %m");
 
         SET_FOREACH(dnssl, link->ndisc_dnssl, i)
-                dnssl->marked = true;
+                if (IN6_ARE_ADDR_EQUAL(&dnssl->router, &router))
+                        dnssl->marked = true;
 
         if (lifetime == 0)
                 return 0;
@@ -767,10 +983,12 @@ static int ndisc_router_process_dnssl(Link *link, sd_ndisc_router *rt) {
                 dnssl = set_get(link->ndisc_dnssl, s);
                 if (dnssl) {
                         dnssl->marked = false;
+                        dnssl->router = router;
                         dnssl->valid_until = time_now + lifetime * USEC_PER_SEC;
                         continue;
                 }
 
+                s->router = router;
                 s->valid_until = time_now + lifetime * USEC_PER_SEC;
 
                 r = set_ensure_consume(&link->ndisc_dnssl, &ndisc_dnssl_hash_ops, TAKE_PTR(s));
@@ -865,9 +1083,11 @@ static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
 }
 
 static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
-        Address *address;
-        Route *route;
+        struct in6_addr router;
         uint64_t flags;
+        NDiscAddress *na;
+        NDiscRoute *nr;
+        Iterator i;
         int r;
 
         assert(link);
@@ -880,17 +1100,17 @@ static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
 
         link_dirty(link);
 
-        while ((address = set_steal_first(link->ndisc_addresses))) {
-                r = set_ensure_put(&link->ndisc_addresses_old, &address_hash_ops, address);
-                if (r < 0)
-                        return log_link_error_errno(link, r, "Failed to store old NDisc SLAAC address: %m");
-        }
+        r = sd_ndisc_router_get_address(rt, &router);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Failed to get router address from RA: %m");
 
-        while ((route = set_steal_first(link->ndisc_routes))) {
-                r = set_ensure_put(&link->ndisc_routes_old, &route_hash_ops, route);
-                if (r < 0)
-                        return log_link_error_errno(link, r, "Failed to store old NDisc route: %m");
-        }
+        SET_FOREACH(na, link->ndisc_addresses, i)
+                if (IN6_ARE_ADDR_EQUAL(&na->router, &router))
+                        na->marked = true;
+
+        SET_FOREACH(nr, link->ndisc_routes, i)
+                if (IN6_ARE_ADDR_EQUAL(&nr->router, &router))
+                        nr->marked = true;
 
         r = sd_ndisc_router_get_flags(rt, &flags);
         if (r < 0)
@@ -933,7 +1153,7 @@ static int ndisc_router_handler(Link *link, sd_ndisc_router *rt) {
         else
                 log_link_debug(link, "Setting NDisc routes.");
 
-        r = ndisc_remove_old(link, false);
+        r = ndisc_remove_old(link);
         if (r < 0)
                 return r;
 

src/network/networkd-ndisc.h

@@ -2,7 +2,9 @@
 #pragma once
 
 #include "conf-parser.h"
+#include "networkd-address.h"
 #include "networkd-link.h"
+#include "networkd-route.h"
 #include "time-util.h"
 
 typedef struct IPv6Token IPv6Token;
@@ -23,9 +25,24 @@ typedef enum IPv6AcceptRAStartDHCP6Client {
         _IPV6_ACCEPT_RA_START_DHCP6_CLIENT_INVALID = -1,
 } IPv6AcceptRAStartDHCP6Client;
 
+typedef struct NDiscAddress {
+        /* Used when GC'ing old DNS servers when configuration changes. */
+        bool marked;
+        struct in6_addr router;
+        Address *address;
+} NDiscAddress;
+
+typedef struct NDiscRoute {
+        /* Used when GC'ing old DNS servers when configuration changes. */
+        bool marked;
+        struct in6_addr router;
+        Route *route;
+} NDiscRoute;
+
 typedef struct NDiscRDNSS {
         /* Used when GC'ing old DNS servers when configuration changes. */
         bool marked;
+        struct in6_addr router;
         usec_t valid_until;
         struct in6_addr address;
 } NDiscRDNSS;
@@ -33,6 +50,7 @@ typedef struct NDiscRDNSS {
 typedef struct NDiscDNSSL {
         /* Used when GC'ing old domains when configuration changes. */
         bool marked;
+        struct in6_addr router;
         usec_t valid_until;
         /* The domain name follows immediately. */
 } NDiscDNSSL;

src/network/networkd-route.c

@@ -9,6 +9,7 @@
 #include "netlink-util.h"
 #include "networkd-ipv4ll.h"
 #include "networkd-manager.h"
+#include "networkd-ndisc.h"
 #include "networkd-route.h"
 #include "parse-util.h"
 #include "set.h"
@@ -142,6 +143,9 @@ void route_free(Route *route) {
         network_config_section_free(route->section);
 
         if (route->link) {
+                NDiscRoute *n;
+                Iterator i;
+
                 set_remove(route->link->routes, route);
                 set_remove(route->link->routes_foreign, route);
                 set_remove(route->link->dhcp_routes, route);
@@ -150,8 +154,9 @@ void route_free(Route *route) {
                 set_remove(route->link->dhcp6_routes_old, route);
                 set_remove(route->link->dhcp6_pd_routes, route);
                 set_remove(route->link->dhcp6_pd_routes_old, route);
-                set_remove(route->link->ndisc_routes, route);
-                set_remove(route->link->ndisc_routes_old, route);
+                SET_FOREACH(n, route->link->ndisc_routes, i)
+                        if (n->route == route)
+                                free(set_remove(route->link->ndisc_routes, n));
         }
 
         ordered_set_free_free(route->multipath_routes);
@@ -161,7 +166,7 @@ void route_free(Route *route) {
         free(route);
 }
 
-static void route_hash_func(const Route *route, struct siphash *state) {
+void route_hash_func(const Route *route, struct siphash *state) {
         assert(route);
 
         siphash24_compress(&route->family, sizeof(route->family), state);
@@ -196,7 +201,7 @@ static void route_hash_func(const Route *route, struct siphash *state) {
         }
 }
 
-static int route_compare_func(const Route *a, const Route *b) {
+int route_compare_func(const Route *a, const Route *b) {
         int r;
 
         r = CMP(a->family, b->family);

src/network/networkd-route.h

@@ -62,6 +62,8 @@ struct Route {
         LIST_FIELDS(Route, routes);
 };
 
+void route_hash_func(const Route *route, struct siphash *state);
+int route_compare_func(const Route *a, const Route *b);
 extern const struct hash_ops route_hash_ops;
 
 int route_new(Route **ret);

src/shared/bus-unit-util.c

@@ -1275,9 +1275,15 @@ static int bus_append_execute_property(sd_bus_message *m, const char *field, con
                 _cleanup_free_ uint8_t *array = NULL;
                 size_t allocated;
 
-                r = parse_cpu_set(eq, &nodes);
-                if (r < 0)
-                        return log_error_errno(r, "Failed to parse %s value: %s", field, eq);
+                if (eq && streq(eq, "all")) {
+                        r = numa_mask_add_all(&nodes);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to create NUMA mask representing \"all\" NUMA nodes: %m");
+                } else {
+                        r = parse_cpu_set(eq, &nodes);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to parse %s value: %s", field, eq);
+                }
 
                 r = cpu_set_to_dbus(&nodes, &array, &allocated);
                 if (r < 0)

src/shared/cpu-set-util.c

@@ -105,7 +105,7 @@ int cpu_set_realloc(CPUSet *cpu_set, unsigned ncpus) {
         return 0;
 }
 
-static int cpu_set_add(CPUSet *cpu_set, unsigned cpu) {
+int cpu_set_add(CPUSet *cpu_set, unsigned cpu) {
         int r;
 
         if (cpu >= 8192)

src/shared/cpu-set-util.h

@@ -20,6 +20,7 @@ static inline void cpu_set_reset(CPUSet *a) {
 }
 
 int cpu_set_add_all(CPUSet *a, const CPUSet *b);
+int cpu_set_add(CPUSet *a, unsigned cpu);
 
 char* cpu_set_to_string(const CPUSet *a);
 char *cpu_set_to_range_string(const CPUSet *a);

src/shared/numa-util.c

@@ -5,6 +5,8 @@
 
 #include "alloc-util.h"
 #include "cpu-set-util.h"
+#include "dirent-util.h"
+#include "fd-util.h"
 #include "fileio.h"
 #include "macro.h"
 #include "missing_syscall.h"
@@ -124,6 +126,61 @@ int numa_to_cpu_set(const NUMAPolicy *policy, CPUSet *ret) {
         return 0;
 }
 
+static int numa_max_node(void) {
+        _cleanup_closedir_ DIR *d = NULL;
+        struct dirent *de;
+        int r, max_node = 0;
+
+        d = opendir("/sys/devices/system/node");
+        if (!d)
+                return -errno;
+
+        FOREACH_DIRENT(de, d, break) {
+                int node;
+                const char *n;
+
+                (void) dirent_ensure_type(d, de);
+
+                if (de->d_type != DT_DIR)
+                        continue;
+
+                n = startswith(de->d_name, "node");
+                if (!n)
+                        continue;
+
+                r = safe_atoi(n, &node);
+                if (r < 0)
+                        continue;
+
+                if (node > max_node)
+                        max_node = node;
+        }
+
+        return max_node;
+}
+
+int numa_mask_add_all(CPUSet *mask) {
+        int m;
+
+        assert(mask);
+
+        m = numa_max_node();
+        if (m < 0) {
+                log_debug_errno(m, "Failed to determine maximum NUMA node index, assuming 1023: %m");
+                m = 1023; /* CONFIG_NODES_SHIFT is set to 10 on x86_64, i.e. 1024 NUMA nodes in total */
+        }
+
+        for (int i = 0; i <= m; i++) {
+                int r;
+
+                r = cpu_set_add(mask, i);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
 static const char* const mpol_table[] = {
         [MPOL_DEFAULT]    = "default",
         [MPOL_PREFERRED]  = "preferred",

src/shared/numa-util.h

@@ -29,5 +29,7 @@ static inline void numa_policy_reset(NUMAPolicy *p) {
 int apply_numa_policy(const NUMAPolicy *policy);
 int numa_to_cpu_set(const NUMAPolicy *policy, CPUSet *set);
 
+int numa_mask_add_all(CPUSet *mask);
+
 const char* mpol_to_string(int i) _const_;
 int mpol_from_string(const char *s) _pure_;