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network/nexthop: preparation for dynamically configuring nexthops
Preparation for later commits.
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@ -105,7 +105,6 @@ static NextHop* nexthop_free(NextHop *nexthop) {
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}
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DEFINE_TRIVIAL_REF_UNREF_FUNC(NextHop, nexthop, nexthop_free);
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DEFINE_SECTION_CLEANUP_FUNCTIONS(NextHop, nexthop_unref);
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DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
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nexthop_hash_ops,
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@ -123,7 +122,7 @@ DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
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NextHop,
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nexthop_detach);
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static int nexthop_new(NextHop **ret) {
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int nexthop_new(NextHop **ret) {
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_cleanup_(nexthop_unrefp) NextHop *nexthop = NULL;
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nexthop = new(NextHop, 1);
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@ -339,7 +338,7 @@ static int nexthop_get(Link *link, const NextHop *in, NextHop **ret) {
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return -ENOENT;
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}
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static int nexthop_get_request_by_id(Manager *manager, uint32_t id, Request **ret) {
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int nexthop_get_request_by_id(Manager *manager, uint32_t id, Request **ret) {
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Request *req;
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assert(manager);
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@ -459,7 +458,7 @@ static int nexthop_acquire_id(Manager *manager, NextHop *nexthop) {
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return -EBUSY;
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}
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static void log_nexthop_debug(const NextHop *nexthop, const char *str, Manager *manager) {
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void log_nexthop_debug(const NextHop *nexthop, const char *str, Manager *manager) {
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_cleanup_free_ char *state = NULL, *group = NULL, *flags = NULL;
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struct nexthop_grp *nhg;
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Link *link = NULL;
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@ -569,6 +568,33 @@ int nexthop_remove(NextHop *nexthop, Manager *manager) {
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return 0;
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}
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int nexthop_remove_and_cancel(NextHop *nexthop, Manager *manager) {
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_cleanup_(request_unrefp) Request *req = NULL;
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bool waiting = false;
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assert(nexthop);
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assert(nexthop->id > 0);
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assert(manager);
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/* If the nexthop is remembered by the manager, then use the remembered object. */
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(void) nexthop_get_by_id(manager, nexthop->id, &nexthop);
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/* Cancel the request for the nexthop. If the request is already called but we have not received the
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* notification about the request, then explicitly remove the nexthop. */
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if (nexthop_get_request_by_id(manager, nexthop->id, &req) >= 0) {
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request_ref(req); /* avoid the request freed by request_detach() */
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waiting = req->waiting_reply;
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request_detach(req);
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nexthop_cancel_requesting(nexthop);
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}
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/* If we know that the nexthop will come or already exists, remove it. */
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if (waiting || (nexthop->manager && nexthop_exists(nexthop)))
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return nexthop_remove(nexthop, manager);
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return 0;
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}
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static int nexthop_configure(NextHop *nexthop, Link *link, Request *req) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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int r;
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@ -633,19 +659,32 @@ static int nexthop_configure(NextHop *nexthop, Link *link, Request *req) {
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return request_call_netlink_async(link->manager->rtnl, m, req);
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}
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static int static_nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, NextHop *nexthop) {
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int nexthop_configure_handler_internal(sd_netlink_message *m, Link *link, const char *error_msg) {
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int r;
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assert(m);
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assert(link);
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assert(error_msg);
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_message_warning_errno(link, m, r, "Could not set nexthop");
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log_link_message_warning_errno(link, m, r, error_msg);
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link_enter_failed(link);
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return 1;
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return 0;
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}
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return 1;
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}
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static int static_nexthop_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, NextHop *nexthop) {
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int r;
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assert(link);
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r = nexthop_configure_handler_internal(m, link, "Failed to set static nexthop");
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if (r <= 0)
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return r;
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if (link->static_nexthop_messages == 0) {
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log_link_debug(link, "Nexthops set");
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link->static_nexthops_configured = true;
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@ -740,7 +779,12 @@ static int nexthop_process_request(Request *req, Link *link, NextHop *nexthop) {
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return 1;
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}
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static int link_request_nexthop(Link *link, const NextHop *nexthop) {
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int link_request_nexthop(
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Link *link,
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const NextHop *nexthop,
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unsigned *message_counter,
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nexthop_netlink_handler_t netlink_handler) {
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_cleanup_(nexthop_unrefp) NextHop *tmp = NULL;
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NextHop *existing = NULL;
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int r;
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@ -780,8 +824,8 @@ static int link_request_nexthop(Link *link, const NextHop *nexthop) {
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nexthop_hash_func,
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nexthop_compare_func,
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nexthop_process_request,
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&link->static_nexthop_messages,
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static_nexthop_handler,
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message_counter,
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netlink_handler,
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NULL);
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if (r <= 0)
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return r;
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@ -807,7 +851,7 @@ int link_request_static_nexthops(Link *link, bool only_ipv4) {
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if (only_ipv4 && nh->family != AF_INET)
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continue;
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r = link_request_nexthop(link, nh);
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r = link_request_nexthop(link, nh, &link->static_nexthop_messages, static_nexthop_handler);
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if (r < 0)
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return log_link_warning_errno(link, r, "Could not request nexthop: %m");
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}
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@ -866,16 +910,17 @@ int link_drop_nexthops(Link *link, bool only_static) {
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if (!nexthop_exists(nexthop))
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continue;
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if (only_static) {
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if (nexthop->source != NETWORK_CONFIG_SOURCE_STATIC)
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if (nexthop->source == NETWORK_CONFIG_SOURCE_FOREIGN) {
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if (only_static)
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continue;
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} else {
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/* Do not mark foreign nexthop when KeepConfiguration= is enabled. */
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if (nexthop->source == NETWORK_CONFIG_SOURCE_FOREIGN &&
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link->network &&
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if (link->network &&
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FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
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continue;
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}
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} else if (nexthop->source != NETWORK_CONFIG_SOURCE_STATIC)
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continue; /* Ignore dynamically configurad nexthops. */
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/* Ignore nexthops bound to other links. */
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if (nexthop->ifindex > 0 && nexthop->ifindex != link->ifindex)
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@ -1106,6 +1151,7 @@ int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message,
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NextHop *n = ASSERT_PTR(req->userdata);
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nexthop->source = n->source;
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nexthop->provider = n->provider;
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}
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r = sd_rtnl_message_get_family(message, &nexthop->family);
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@ -16,13 +16,21 @@
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typedef struct Link Link;
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typedef struct Manager Manager;
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typedef struct Network Network;
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typedef struct NextHop NextHop;
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typedef int (*nexthop_netlink_handler_t)(
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sd_netlink *rtnl,
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sd_netlink_message *m,
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Request *req,
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Link *link,
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NextHop *address);
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typedef struct NextHop {
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struct NextHop {
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Network *network;
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Manager *manager;
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ConfigSection *section;
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NetworkConfigSource source;
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NetworkConfigState state;
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union in_addr_union provider; /* DHCP server or router address */
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unsigned n_ref;
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@ -44,12 +52,17 @@ typedef struct NextHop {
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/* For managing routes and nexthops that depend on this nexthop. */
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Set *nexthops;
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Set *routes;
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} NextHop;
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};
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void log_nexthop_debug(const NextHop *nexthop, const char *str, Manager *manager);
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int nexthop_new(NextHop **ret);
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NextHop* nexthop_ref(NextHop *nexthop);
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NextHop* nexthop_unref(NextHop *nexthop);
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DEFINE_SECTION_CLEANUP_FUNCTIONS(NextHop, nexthop_unref);
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int nexthop_remove(NextHop *nexthop, Manager *manager);
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int nexthop_remove_and_cancel(NextHop *nexthop, Manager *manager);
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int network_drop_invalid_nexthops(Network *network);
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@ -62,9 +75,16 @@ static inline int link_drop_static_nexthops(Link *link) {
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}
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void link_forget_nexthops(Link *link);
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int nexthop_configure_handler_internal(sd_netlink_message *m, Link *link, const char *error_msg);
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int link_request_nexthop(
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Link *link,
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const NextHop *nexthop,
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unsigned *message_counter,
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nexthop_netlink_handler_t netlink_handler);
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int link_request_static_nexthops(Link *link, bool only_ipv4);
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int nexthop_get_by_id(Manager *manager, uint32_t id, NextHop **ret);
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int nexthop_get_request_by_id(Manager *manager, uint32_t id, Request **ret);
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int nexthop_is_ready(Manager *manager, uint32_t id, NextHop **ret);
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int manager_rtnl_process_nexthop(sd_netlink *rtnl, sd_netlink_message *message, Manager *m);
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int manager_build_nexthop_ids(Manager *manager);
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