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network: also adjust IPv6 MTU by the maximum MTU of the interface

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This commit is contained in:
Yu Watanabe
2021-06-09 04:59:23 +09:00
parent 717ba5fc90
commit e56e1a15b5
1 changed files with 10 additions and 1 deletions
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src/network/networkd-sysctl.c
+10 -1
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@@ -184,6 +184,8 @@ static int link_set_ipv6_proxy_ndp(Link *link) {
}
int link_set_ipv6_mtu(Link *link) {
uint32_t mtu;
assert(link);
/* Make this a NOP if IPv6 is not available */
@@ -199,7 +201,14 @@ int link_set_ipv6_mtu(Link *link) {
if (link->network->ipv6_mtu == 0)
return 0;
return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
mtu = link->network->ipv6_mtu;
if (mtu > link->max_mtu) {
log_link_warning(link, "Reducing requested IPv6 MTU %"PRIu32" to the interface's maximum MTU %"PRIu32".",
mtu, link->max_mtu);
mtu = link->max_mtu;
}
return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", mtu);
}
static int link_set_ipv4_accept_local(Link *link) {