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Diffstat (limited to 'src/network/networkd-link.c')
-rw-r--r--src/network/networkd-link.c100
1 files changed, 87 insertions, 13 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 9059a68fe3..5fc513bfda 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -42,6 +42,9 @@
static bool link_dhcp6_enabled(Link *link) {
assert(link);
+ if (!socket_ipv6_is_supported())
+ return false;
+
if (link->flags & IFF_LOOPBACK)
return false;
@@ -90,6 +93,9 @@ static bool link_ipv4ll_enabled(Link *link) {
static bool link_ipv6ll_enabled(Link *link) {
assert(link);
+ if (!socket_ipv6_is_supported())
+ return false;
+
if (link->flags & IFF_LOOPBACK)
return false;
@@ -99,6 +105,15 @@ static bool link_ipv6ll_enabled(Link *link) {
return link->network->link_local & ADDRESS_FAMILY_IPV6;
}
+static bool link_ipv6_enabled(Link *link) {
+ assert(link);
+
+ if (!socket_ipv6_is_supported())
+ return false;
+
+ return link_dhcp6_enabled(link) || link_ipv6ll_enabled(link) || network_has_static_ipv6_addresses(link->network);
+}
+
static bool link_lldp_rx_enabled(Link *link) {
assert(link);
@@ -183,6 +198,9 @@ static bool link_proxy_arp_enabled(Link *link) {
static bool link_ipv6_accept_ra_enabled(Link *link) {
assert(link);
+ if (!socket_ipv6_is_supported())
+ return false;
+
if (link->flags & IFF_LOOPBACK)
return false;
@@ -205,6 +223,7 @@ static bool link_ipv6_accept_ra_enabled(Link *link) {
}
static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
+ assert(link);
if (!socket_ipv6_is_supported())
return _IPV6_PRIVACY_EXTENSIONS_INVALID;
@@ -218,6 +237,31 @@ static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
return link->network->ipv6_privacy_extensions;
}
+static int link_enable_ipv6(Link *link) {
+ const char *p = NULL;
+ bool disabled;
+ int r;
+
+ if (link->flags & IFF_LOOPBACK)
+ return 0;
+
+ disabled = !link_ipv6_enabled(link);
+
+ p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/disable_ipv6");
+
+ r = write_string_file(p, one_zero(disabled), WRITE_STRING_FILE_VERIFY_ON_FAILURE);
+ if (r < 0)
+ log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m", disabled ? "disable" : "enable", link->ifname);
+ else {
+ if (disabled)
+ log_link_info(link, "IPv6 disabled for interface: %m");
+ else
+ log_link_info(link, "IPv6 enabled for interface: %m");
+ }
+
+ return 0;
+}
+
void link_update_operstate(Link *link) {
LinkOperationalState operstate;
assert(link);
@@ -265,7 +309,6 @@ void link_update_operstate(Link *link) {
link->operstate = operstate;
link_send_changed(link, "OperationalState", NULL);
link_dirty(link);
- manager_dirty(link->manager);
}
}
@@ -533,8 +576,6 @@ static void link_set_state(Link *link, LinkState state) {
link->state = state;
link_send_changed(link, "AdministrativeState", NULL);
-
- return;
}
static void link_enter_unmanaged(Link *link) {
@@ -1415,7 +1456,7 @@ static int link_acquire_ipv6_conf(Link *link) {
return 0;
}
-static int link_acquire_conf(Link *link) {
+static int link_acquire_ipv4_conf(Link *link) {
int r;
assert(link);
@@ -1443,6 +1484,24 @@ static int link_acquire_conf(Link *link) {
return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
}
+ return 0;
+}
+
+static int link_acquire_conf(Link *link) {
+ int r;
+
+ assert(link);
+
+ r = link_acquire_ipv4_conf(link);
+ if (r < 0)
+ return r;
+
+ if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
+ r = link_acquire_ipv6_conf(link);
+ if (r < 0)
+ return r;
+ }
+
if (link_lldp_tx_enabled(link)) {
r = link_lldp_tx_start(link);
if (r < 0)
@@ -1510,7 +1569,21 @@ static int link_up(Link *link) {
return log_link_error_errno(link, r, "Could not set MAC address: %m");
}
+ /* If IPv6 not configured (no static IPv6 address and neither DHCPv6 nor IPv6LL is enabled)
+ for this interface then disable IPv6 else enable it. */
+ (void) link_enable_ipv6(link);
+
if (link->network->mtu) {
+ /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
+ on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
+ if (link_ipv6_enabled(link) && link->network->mtu < IPV6_MIN_MTU) {
+
+ log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
+ "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes: %m");
+
+ link->network->mtu = IPV6_MIN_MTU;
+ }
+
r = sd_netlink_message_append_u32(req, IFLA_MTU, link->network->mtu);
if (r < 0)
return log_link_error_errno(link, r, "Could not set MTU: %m");
@@ -1520,7 +1593,7 @@ static int link_up(Link *link) {
if (r < 0)
return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
- if (socket_ipv6_is_supported()) {
+ if (link_ipv6_enabled(link)) {
/* if the kernel lacks ipv6 support setting IFF_UP fails if any ipv6 options are passed */
r = sd_netlink_message_open_container(req, AF_INET6);
if (r < 0)
@@ -2294,12 +2367,6 @@ static int link_configure(Link *link) {
r = link_acquire_conf(link);
if (r < 0)
return r;
-
- if (in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) == 0) {
- r = link_acquire_ipv6_conf(link);
- if (r < 0)
- return r;
- }
}
return link_enter_join_netdev(link);
@@ -2682,6 +2749,10 @@ static int link_carrier_gained(Link *link) {
link_enter_failed(link);
return r;
}
+
+ r = link_enter_set_addresses(link);
+ if (r < 0)
+ return r;
}
r = link_handle_bound_by_list(link);
@@ -3180,14 +3251,17 @@ void link_dirty(Link *link) {
assert(link);
+ /* mark manager dirty as link is dirty */
+ manager_dirty(link->manager);
+
r = set_ensure_allocated(&link->manager->dirty_links, NULL);
if (r < 0)
/* allocation errors are ignored */
return;
r = set_put(link->manager->dirty_links, link);
- if (r < 0)
- /* allocation errors are ignored */
+ if (r <= 0)
+ /* don't take another ref if the link was already dirty */
return;
link_ref(link);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-04-17 05:48:06 +0000