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core/platform: sort routes before adding them in nm_platform_ipX_route_sync()

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A gateway route can only be added, if there exists a device route
for that gateway. Therefore, nm_platform_ip4_route_sync() and
nm_platform_ip6_route_sync() has to add the device routes first,
before adding gateway routes.

Note: usually for all configured addresses, there is also a device
route for the subnet added by the kernel. This means, NM must first
configure the addresses before route_sync, so that these implicit device
routes already exist -- this is however already done correctly.

Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller 2014-01-23 09:11:19 +01:00 committed by Dan Williams
parent c8d7a06d64
commit 8959b6dbcb
1 changed files with 46 additions and 30 deletions
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76
src/platform/nm-platform.c
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@ -1607,7 +1607,7 @@ nm_platform_ip4_route_sync (int ifindex, const GArray *known_routes)
NMPlatformIP4Route *route;
const NMPlatformIP4Route *known_route;
gboolean success;
int i;
int i, i_type;
/* Delete unknown routes */
routes = nm_platform_ip4_route_get_all (ifindex, FALSE);
@ -1624,21 +1624,29 @@ nm_platform_ip4_route_sync (int ifindex, const GArray *known_routes)
}
/* Add missing routes */
for (i = 0, success = TRUE; i < known_routes->len && success; i++) {
known_route = &g_array_index (known_routes, NMPlatformIP4Route, i);
for (i_type = 0, success = TRUE; i_type < 2 && success; i_type++) {
for (i = 0; i < known_routes->len && success; i++) {
known_route = &g_array_index (known_routes, NMPlatformIP4Route, i);
/* Ignore routes that already exist */
if (!array_contains_ip4_route (routes, known_route)) {
success = nm_platform_ip4_route_add (ifindex,
known_route->network,
known_route->plen,
known_route->gateway,
known_route->metric,
known_route->mss);
if (!success && known_route->source < NM_PLATFORM_SOURCE_USER) {
nm_log_dbg (LOGD_PLATFORM, "ignore error adding IPv4 route to kernel: %s",
nm_platform_ip4_route_to_string (known_route));
success = TRUE;
if ((known_route->gateway == 0) ^ (i_type != 0)) {
/* Make two runs over the list of routes. On the first, only add
* device routes, on the second the others (gateway routes). */
continue;
}
/* Ignore routes that already exist */
if (!array_contains_ip4_route (routes, known_route)) {
success = nm_platform_ip4_route_add (ifindex,
known_route->network,
known_route->plen,
known_route->gateway,
known_route->metric,
known_route->mss);
if (!success && known_route->source < NM_PLATFORM_SOURCE_USER) {
nm_log_dbg (LOGD_PLATFORM, "ignore error adding IPv4 route to kernel: %s",
nm_platform_ip4_route_to_string (known_route));
success = TRUE;
}
}
}
}
@ -1665,7 +1673,7 @@ nm_platform_ip6_route_sync (int ifindex, const GArray *known_routes)
NMPlatformIP6Route *route;
const NMPlatformIP6Route *known_route;
gboolean success;
int i;
int i, i_type;
/* Delete unknown routes */
routes = nm_platform_ip6_route_get_all (ifindex, FALSE);
@ -1683,21 +1691,29 @@ nm_platform_ip6_route_sync (int ifindex, const GArray *known_routes)
}
/* Add missing routes */
for (i = 0, success = TRUE; i < known_routes->len && success; i++) {
known_route = &g_array_index (known_routes, NMPlatformIP6Route, i);
for (i_type = 0, success = TRUE; i_type < 2 && success; i_type++) {
for (i = 0; i < known_routes->len && success; i++) {
known_route = &g_array_index (known_routes, NMPlatformIP6Route, i);
/* Ignore routes that already exist */
if (!array_contains_ip6_route (routes, known_route)) {
success = nm_platform_ip6_route_add (ifindex,
known_route->network,
known_route->plen,
known_route->gateway,
known_route->metric,
known_route->mss);
if (!success && known_route->source < NM_PLATFORM_SOURCE_USER) {
nm_log_dbg (LOGD_PLATFORM, "ignore error adding IPv6 route to kernel: %s",
nm_platform_ip6_route_to_string (known_route));
success = TRUE;
if (IN6_IS_ADDR_UNSPECIFIED (&known_route->gateway) ^ (i_type != 0)) {
/* Make two runs over the list of routes. On the first, only add
* device routes, on the second the others (gateway routes). */
continue;
}
/* Ignore routes that already exist */
if (!array_contains_ip6_route (routes, known_route)) {
success = nm_platform_ip6_route_add (ifindex,
known_route->network,
known_route->plen,
known_route->gateway,
known_route->metric,
known_route->mss);
if (!success && known_route->source < NM_PLATFORM_SOURCE_USER) {
nm_log_dbg (LOGD_PLATFORM, "ignore error adding IPv6 route to kernel: %s",
nm_platform_ip6_route_to_string (known_route));
success = TRUE;
}
}
}
}