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Merge pull request #17958 from yuwata/network-route-log
network: introduce log_route_debug()
This commit is contained in:
Luca Boccassi
GitHub
commit
e82b77e984
@ -581,6 +581,37 @@ static bool route_type_is_reject(const Route *route) {
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return IN_SET(route->type, RTN_UNREACHABLE, RTN_PROHIBIT, RTN_BLACKHOLE, RTN_THROW);
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}
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static void log_route_debug(const Route *route, const char *str, const Link *link) {
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assert(route);
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assert(str);
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/* link may be NULL. */
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *dst = NULL, *dst_prefixlen = NULL, *src = NULL, *gw = NULL, *prefsrc = NULL;
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char scope[ROUTE_SCOPE_STR_MAX], table[ROUTE_TABLE_STR_MAX], protocol[ROUTE_PROTOCOL_STR_MAX];
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if (!in_addr_is_null(route->family, &route->dst)) {
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(void) in_addr_to_string(route->family, &route->dst, &dst);
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(void) asprintf(&dst_prefixlen, "/%u", route->dst_prefixlen);
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}
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if (!in_addr_is_null(route->family, &route->src))
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(void) in_addr_to_string(route->family, &route->src, &src);
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if (!in_addr_is_null(route->gw_family, &route->gw))
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(void) in_addr_to_string(route->gw_family, &route->gw, &gw);
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if (!in_addr_is_null(route->family, &route->prefsrc))
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(void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc);
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log_link_debug(link,
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"%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
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str, strna(dst), strempty(dst_prefixlen), strna(src), strna(gw), strna(prefsrc),
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format_route_scope(route->scope, scope, sizeof(scope)),
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format_route_table(route->table, table, sizeof(table)),
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format_route_protocol(route->protocol, protocol, sizeof(protocol)),
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strna(route_type_to_string(route->type)));
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}
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}
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static int route_set_netlink_message(const Route *route, sd_netlink_message *req, Link *link) {
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unsigned flags;
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int r;
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@ -717,35 +748,14 @@ int route_remove(
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manager = link->manager;
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/* link may be NULL! */
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log_route_debug(route, "Removing", link);
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r = sd_rtnl_message_new_route(manager->rtnl, &req,
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RTM_DELROUTE, route->family,
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route->protocol);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not create RTM_DELROUTE message: %m");
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *dst = NULL, *dst_prefixlen = NULL, *src = NULL, *gw = NULL, *prefsrc = NULL;
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char scope[ROUTE_SCOPE_STR_MAX], table[ROUTE_TABLE_STR_MAX], protocol[ROUTE_PROTOCOL_STR_MAX];
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if (!in_addr_is_null(route->family, &route->dst)) {
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(void) in_addr_to_string(route->family, &route->dst, &dst);
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(void) asprintf(&dst_prefixlen, "/%u", route->dst_prefixlen);
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}
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if (!in_addr_is_null(route->family, &route->src))
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(void) in_addr_to_string(route->family, &route->src, &src);
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if (!in_addr_is_null(route->gw_family, &route->gw))
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(void) in_addr_to_string(route->gw_family, &route->gw, &gw);
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if (!in_addr_is_null(route->family, &route->prefsrc))
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(void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc);
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log_link_debug(link, "Removing route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
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strna(dst), strempty(dst_prefixlen), strna(src), strna(gw), strna(prefsrc),
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format_route_scope(route->scope, scope, sizeof(scope)),
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format_route_table(route->table, table, sizeof(table)),
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format_route_protocol(route->protocol, protocol, sizeof(protocol)),
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strna(route_type_to_string(route->type)));
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}
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r = route_set_netlink_message(route, req, link);
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if (r < 0)
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return r;
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@ -777,7 +787,7 @@ static bool link_has_route(const Link *link, const Route *route) {
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return false;
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}
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static bool links_have_route(Manager *manager, const Route *route, const Link *except) {
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static bool links_have_route(const Manager *manager, const Route *route, const Link *except) {
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Link *link;
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assert(manager);
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@ -793,19 +803,21 @@ static bool links_have_route(Manager *manager, const Route *route, const Link *e
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return false;
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}
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static int manager_drop_foreign_routes(Manager *manager) {
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static int manager_drop_routes_internal(Manager *manager, bool foreign, const Link *except) {
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Route *route;
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int k, r = 0;
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Set *routes;
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assert(manager);
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SET_FOREACH(route, manager->routes_foreign) {
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/* do not touch routes managed by the kernel */
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routes = foreign ? manager->routes_foreign : manager->routes;
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SET_FOREACH(route, routes) {
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/* Do not touch routes managed by the kernel */
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if (route->protocol == RTPROT_KERNEL)
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continue;
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if (links_have_route(manager, route, NULL))
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/* The route will be configured later. */
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/* The route will be configured later, or already configured by a link */
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if (links_have_route(manager, route, except))
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continue;
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/* The existing links do not have the route. Let's drop this now. It may by
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@ -818,29 +830,12 @@ static int manager_drop_foreign_routes(Manager *manager) {
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return r;
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}
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static int manager_drop_routes(Manager *manager, Link *except) {
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Route *route;
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int k, r = 0;
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static int manager_drop_foreign_routes(Manager *manager) {
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return manager_drop_routes_internal(manager, true, NULL);
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}
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assert(manager);
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SET_FOREACH(route, manager->routes) {
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/* do not touch routes managed by the kernel */
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if (route->protocol == RTPROT_KERNEL)
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continue;
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if (links_have_route(manager, route, except))
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/* The route will be configured later. */
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continue;
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/* The existing links do not have the route. Let's drop this now. It may by
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* re-configured later. */
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k = route_remove(route, manager, NULL, NULL);
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if (k < 0 && r >= 0)
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r = k;
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}
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return r;
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static int manager_drop_routes(Manager *manager, const Link *except) {
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return manager_drop_routes_internal(manager, false, except);
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}
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int link_drop_foreign_routes(Link *link) {
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@ -1068,28 +1063,7 @@ int route_configure(
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return log_link_error_errno(link, SYNTHETIC_ERRNO(E2BIG),
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"Too many routes are configured, refusing: %m");
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *dst = NULL, *dst_prefixlen = NULL, *src = NULL, *gw = NULL, *prefsrc = NULL;
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char scope[ROUTE_SCOPE_STR_MAX], table[ROUTE_TABLE_STR_MAX], protocol[ROUTE_PROTOCOL_STR_MAX];
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if (!in_addr_is_null(route->family, &route->dst)) {
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(void) in_addr_to_string(route->family, &route->dst, &dst);
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(void) asprintf(&dst_prefixlen, "/%u", route->dst_prefixlen);
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}
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if (!in_addr_is_null(route->family, &route->src))
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(void) in_addr_to_string(route->family, &route->src, &src);
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if (!in_addr_is_null(route->gw_family, &route->gw))
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(void) in_addr_to_string(route->gw_family, &route->gw, &gw);
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if (!in_addr_is_null(route->family, &route->prefsrc))
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(void) in_addr_to_string(route->family, &route->prefsrc, &prefsrc);
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log_link_debug(link, "Configuring route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
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strna(dst), strempty(dst_prefixlen), strna(src), strna(gw), strna(prefsrc),
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format_route_scope(route->scope, scope, sizeof(scope)),
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format_route_table(route->table, table, sizeof(table)),
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format_route_protocol(route->protocol, protocol, sizeof(protocol)),
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strna(route_type_to_string(route->type)));
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}
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log_route_debug(route, "Configuring", link);
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r = sd_rtnl_message_new_route(link->manager->rtnl, &req,
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RTM_NEWROUTE, route->family,
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@ -1308,50 +1282,29 @@ static int process_route_one(Manager *manager, Link *link, uint16_t type, const
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(void) route_get(manager, link, tmp, &route);
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *buf_dst = NULL, *buf_dst_prefixlen = NULL,
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*buf_src = NULL, *buf_gw = NULL, *buf_prefsrc = NULL;
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char buf_scope[ROUTE_SCOPE_STR_MAX], buf_table[ROUTE_TABLE_STR_MAX],
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buf_protocol[ROUTE_PROTOCOL_STR_MAX];
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if (!in_addr_is_null(tmp->family, &tmp->dst)) {
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(void) in_addr_to_string(tmp->family, &tmp->dst, &buf_dst);
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(void) asprintf(&buf_dst_prefixlen, "/%u", tmp->dst_prefixlen);
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}
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if (!in_addr_is_null(tmp->family, &tmp->src))
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(void) in_addr_to_string(tmp->family, &tmp->src, &buf_src);
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if (!in_addr_is_null(tmp->gw_family, &tmp->gw))
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(void) in_addr_to_string(tmp->gw_family, &tmp->gw, &buf_gw);
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if (!in_addr_is_null(tmp->family, &tmp->prefsrc))
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(void) in_addr_to_string(tmp->family, &tmp->prefsrc, &buf_prefsrc);
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log_link_debug(link,
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"%s route: dst: %s%s, src: %s, gw: %s, prefsrc: %s, scope: %s, table: %s, proto: %s, type: %s",
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(!route && !manager->manage_foreign_routes) ? "Ignoring received foreign" :
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type == RTM_DELROUTE ? "Forgetting" :
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route ? "Received remembered" : "Remembering",
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strna(buf_dst), strempty(buf_dst_prefixlen),
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strna(buf_src), strna(buf_gw), strna(buf_prefsrc),
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format_route_scope(tmp->scope, buf_scope, sizeof buf_scope),
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format_route_table(tmp->table, buf_table, sizeof buf_table),
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format_route_protocol(tmp->protocol, buf_protocol, sizeof buf_protocol),
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strna(route_type_to_string(tmp->type)));
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}
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switch (type) {
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case RTM_NEWROUTE:
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if (!route && manager->manage_foreign_routes) {
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/* A route appeared that we did not request */
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r = route_add_foreign(manager, link, tmp, NULL);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
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return 0;
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if (!route) {
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if (!manager->manage_foreign_routes)
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log_route_debug(tmp, "Ignoring received foreign", link);
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else {
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/* A route appeared that we did not request */
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log_route_debug(tmp, "Remembering foreign", link);
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r = route_add_foreign(manager, link, tmp, NULL);
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if (r < 0) {
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log_link_warning_errno(link, r, "Failed to remember foreign route, ignoring: %m");
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return 0;
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}
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}
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}
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} else
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log_route_debug(tmp, "Received remembered", link);
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break;
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case RTM_DELROUTE:
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log_route_debug(tmp,
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route ? "Forgetting" :
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manager->manage_foreign_routes ? "Kernel removed unknown" : "Ignoring received foreign", link);
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route_free(route);
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break;
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@ -1370,7 +1323,6 @@ int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Ma
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uint32_t ifindex;
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uint16_t type;
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unsigned char table;
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RouteVia via;
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size_t rta_len;
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int r;
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@ -1434,20 +1386,20 @@ int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Ma
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return 0;
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}
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switch (tmp->family) {
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case AF_INET:
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r = sd_netlink_message_read_in_addr(message, RTA_DST, &tmp->dst.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
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return 0;
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}
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r = netlink_message_read_in_addr_union(message, RTA_DST, tmp->family, &tmp->dst);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in_addr(message, RTA_GATEWAY, &tmp->gw.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
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return 0;
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} else if (r >= 0)
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tmp->gw_family = AF_INET;
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r = netlink_message_read_in_addr_union(message, RTA_GATEWAY, tmp->family, &tmp->gw);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
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return 0;
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} else if (r >= 0)
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tmp->gw_family = tmp->family;
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else if (tmp->family == AF_INET) {
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RouteVia via;
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r = sd_netlink_message_read(message, RTA_VIA, sizeof(via), &via);
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if (r < 0 && r != -ENODATA) {
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@ -1457,51 +1409,17 @@ int manager_rtnl_process_route(sd_netlink *rtnl, sd_netlink_message *message, Ma
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tmp->gw_family = via.family;
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tmp->gw = via.address;
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}
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}
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r = sd_netlink_message_read_in_addr(message, RTA_SRC, &tmp->src.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
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return 0;
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}
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r = netlink_message_read_in_addr_union(message, RTA_SRC, tmp->family, &tmp->src);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in_addr(message, RTA_PREFSRC, &tmp->prefsrc.in);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
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return 0;
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}
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break;
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case AF_INET6:
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r = sd_netlink_message_read_in6_addr(message, RTA_DST, &tmp->dst.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid destination, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in6_addr(message, RTA_GATEWAY, &tmp->gw.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid gateway, ignoring: %m");
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return 0;
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} else if (r >= 0)
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tmp->gw_family = AF_INET6;
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r = sd_netlink_message_read_in6_addr(message, RTA_SRC, &tmp->src.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid source, ignoring: %m");
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return 0;
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}
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r = sd_netlink_message_read_in6_addr(message, RTA_PREFSRC, &tmp->prefsrc.in6);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
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return 0;
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}
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break;
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default:
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assert_not_reached("Received route message with unsupported address family");
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r = netlink_message_read_in_addr_union(message, RTA_PREFSRC, tmp->family, &tmp->prefsrc);
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if (r < 0 && r != -ENODATA) {
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log_link_warning_errno(link, r, "rtnl: received route message without valid preferred source, ignoring: %m");
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return 0;
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}
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