diff options
| -rw-r--r-- | src/network/networkd-route.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c index b197a5da6b..6f60ee5e31 100644 --- a/src/network/networkd-route.c +++ b/src/network/networkd-route.c @@ -26,10 +26,37 @@ #include "parse-util.h" #include "set.h" #include "string-util.h" +#include "sysctl-util.h" #include "util.h" -#define ROUTES_PER_LINK_MAX 2048U -#define STATIC_ROUTES_PER_NETWORK_MAX 1024U +#define ROUTES_DEFAULT_MAX_PER_FAMILY 4096U + +static unsigned routes_max(void) { + static thread_local unsigned cached = 0; + + _cleanup_free_ char *s4 = NULL, *s6 = NULL; + unsigned val4 = ROUTES_DEFAULT_MAX_PER_FAMILY, val6 = ROUTES_DEFAULT_MAX_PER_FAMILY; + + if (cached > 0) + return cached; + + if (sysctl_read("net/ipv4/route/max_size", &s4) >= 0) { + truncate_nl(s4); + if (safe_atou(s4, &val4) >= 0 && + val4 == 2147483647U) + /* This is the default "no limit" value in the kernel */ + val4 = ROUTES_DEFAULT_MAX_PER_FAMILY; + } + + if (sysctl_read("net/ipv6/route/max_size", &s6) >= 0) { + truncate_nl(s6); + (void) safe_atou(s6, &val6); + } + + cached = MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val4) + + MAX(ROUTES_DEFAULT_MAX_PER_FAMILY, val6); + return cached; +} int route_new(Route **ret) { _cleanup_route_free_ Route *route = NULL; @@ -67,7 +94,7 @@ int route_new_static(Network *network, unsigned section, Route **ret) { } } - if (network->n_static_routes >= STATIC_ROUTES_PER_NETWORK_MAX) + if (network->n_static_routes >= routes_max()) return -E2BIG; r = route_new(&route); @@ -484,7 +511,7 @@ int route_configure( assert(route->family == AF_INET || route->family == AF_INET6); if (route_get(link, route->family, &route->dst, route->dst_prefixlen, route->tos, route->priority, route->table, NULL) <= 0 && - set_size(link->routes) >= ROUTES_PER_LINK_MAX) + set_size(link->routes) >= routes_max()) return -E2BIG; r = sd_rtnl_message_new_route(link->manager->rtnl, &req, |