systemd/0171-networkd-link-allow-loopback-links-to-be-manage-but-.patch

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2014-10-04 02:43:52 +00:00
From 78c958f82e929f015169ce1ed614d1e9c50928aa Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Thu, 4 Sep 2014 20:54:08 +0200
Subject: [PATCH] networkd: link - allow loopback links to be manage, but
ignore DHCP/IPv4LL
---
src/network/networkd-link.c | 72 ++++++++++++++++++++++++++++++++++++---------
1 file changed, 58 insertions(+), 14 deletions(-)
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index bcd2e6da51..a88cf48d9d 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -35,6 +35,46 @@
#include "dhcp-lease-internal.h"
+static bool link_dhcp6_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->dhcp, DHCP_SUPPORT_V6, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->dhcp, DHCP_SUPPORT_V4, DHCP_SUPPORT_BOTH);
+}
+
+static bool link_dhcp4_server_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return link->network->dhcp_server;
+}
+
+static bool link_ipv4ll_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return link->network->ipv4ll;
+}
+
#define FLAG_STRING(string, flag, old, new) \
(((old ^ new) & flag) \
? ((old & flag) ? (" -" string) : (" +" string)) \
@@ -387,7 +427,7 @@ static int link_enter_configured(Link *link) {
assert(link->network);
assert(link->state == LINK_STATE_SETTING_ROUTES);
- if (link->network->dhcp_server &&
+ if (link_dhcp4_server_enabled(link) &&
!sd_dhcp_server_is_running(link->dhcp_server)) {
struct in_addr pool_start;
Address *address;
@@ -454,13 +494,12 @@ void link_client_handler(Link *link) {
if (!link->static_configured)
return;
- if (link->network->ipv4ll)
+ if (link_ipv4ll_enabled(link))
if (!link->ipv4ll_address ||
!link->ipv4ll_route)
return;
- if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4))
- if (!link->dhcp4_configured)
+ if (link_dhcp4_enabled(link) && !link->dhcp4_configured)
return;
if (link->state != LINK_STATE_CONFIGURED)
@@ -904,7 +943,7 @@ static int link_acquire_conf(Link *link) {
assert(link->manager);
assert(link->manager->event);
- if (link->network->ipv4ll) {
+ if (link_ipv4ll_enabled(link)) {
assert(link->ipv4ll);
log_debug_link(link, "acquiring IPv4 link-local address");
@@ -917,7 +956,7 @@ static int link_acquire_conf(Link *link) {
}
}
- if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
+ if (link_dhcp4_enabled(link)) {
assert(link->dhcp_client);
log_debug_link(link, "acquiring DHCPv4 lease");
@@ -930,7 +969,7 @@ static int link_acquire_conf(Link *link) {
}
}
- if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
+ if (link_dhcp6_enabled(link)) {
assert(link->icmp6_router_discovery);
log_debug_link(link, "discovering IPv6 routers");
@@ -1170,19 +1209,19 @@ static int link_configure(Link *link) {
assert(link->network);
assert(link->state == LINK_STATE_PENDING);
- if (link->network->ipv4ll) {
+ if (link_ipv4ll_enabled(link)) {
r = ipv4ll_configure(link);
if (r < 0)
return r;
}
- if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
+ if (link_dhcp4_enabled(link)) {
r = dhcp4_configure(link);
if (r < 0)
return r;
}
- if (link->network->dhcp_server) {
+ if (link_dhcp4_server_enabled(link)) {
r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
if (r < 0)
return r;
@@ -1192,7 +1231,7 @@ static int link_configure(Link *link) {
return r;
}
- if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
+ if (link_dhcp6_enabled(link)) {
r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
if (r < 0)
return r;
@@ -1251,9 +1290,14 @@ static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m,
return r;
if (link->flags & IFF_LOOPBACK) {
- log_debug_link(link, "matching network ignored for loopback link");
- link_enter_unmanaged(link);
- return 1;
+ if (network->ipv4ll)
+ log_debug_link(link, "ignoring IPv4LL for loopback link");
+
+ if (network->dhcp != DHCP_SUPPORT_NONE)
+ log_debug_link(link, "ignoring DHCP clients for loopback link");
+
+ if (network->dhcp_server)
+ log_debug_link(link, "ignoring DHCP server for loopback link");
}
r = network_apply(link->manager, network, link);