free(address);
}
-int address_configure(Manager *manager, Address *address, Link *link) {
+int address_configure(Address *address, Link *link,
+ sd_rtnl_message_handler_t callback) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
+ assert(link->manager);
+
r = sd_rtnl_message_addr_new(RTM_NEWADDR, link->ifindex,
address->family, address->prefixlen,
IFA_F_PERMANENT, RT_SCOPE_UNIVERSE, &req);
}
}
- r = sd_rtnl_call(manager->rtnl, req, 0, NULL);
+ r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0) {
- log_error("Could not configure address: %s", strerror(-r));
- return r != -EEXIST ? r : 0;
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
}
- log_info("Configured interface address");
+ link->rtnl_messages ++;
return 0;
}
memcpy(&link->mac.ether_addr_octet[0], ether_aton(mac), ETH_ALEN);
link->ifindex = ifindex;
link->manager = manager;
+ link->state = _LINK_STATE_INVALID;
r = hashmap_put(manager->links, &ifindex, link);
if (r < 0)
return 0;
}
-int link_up(Manager *manager, Link *link) {
+static int link_enter_configured(Link *link) {
+ log_info("Link configured successfully.");
+
+ link->state = LINK_STATE_CONFIGURED;
+
+ return 0;
+}
+
+static int link_enter_failed(Link *link) {
+ log_warning("Could not configure link.");
+
+ link->state = LINK_STATE_FAILED;
+
+ return 0;
+}
+
+static bool link_is_up(Link *link) {
+ return link->flags & IFF_UP;
+}
+
+static int link_enter_routes_set(Link *link) {
+ log_info("Routes set for link %d", link->ifindex);
+
+ if (link_is_up(link))
+ return link_enter_configured(link);
+
+ link->state = LINK_STATE_ROUTES_SET;
+
+ return 0;
+}
+
+static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_warning("Could not set route on interface %d: %s",
+ link->ifindex, strerror(-r));
+ return link_enter_failed(link);
+ }
+
+ if (link->rtnl_messages == 0)
+ return link_enter_routes_set(link);
+
+ return 1;
+}
+
+static int link_enter_set_routes(Link *link) {
+ Route *route;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+ assert(link->state == LINK_STATE_ADDRESSES_SET);
+
+ link->state = LINK_STATE_SET_ROUTES;
+
+ if (!link->network->routes)
+ return link_enter_routes_set(link);
+
+ LIST_FOREACH(routes, route, link->network->routes) {
+ r = route_configure(route, link, &route_handler);
+ if (r < 0)
+ link_enter_failed(link);
+ }
+
+ return 0;
+}
+
+static int link_enter_addresses_set(Link *link) {
+ log_info("Addresses set for link %d", link->ifindex);
+
+ link->state = LINK_STATE_ADDRESSES_SET;
+
+ return link_enter_set_routes(link);
+}
+
+static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_warning("Could not set address on interface %d: %s",
+ link->ifindex, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ if (link->rtnl_messages == 0)
+ link_enter_addresses_set(link);
+
+ return 1;
+}
+
+static int link_enter_set_addresses(Link *link) {
+ Address *address;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+
+ if (!link->network->addresses)
+ return link_enter_addresses_set(link);
+
+ link->state = LINK_STATE_SET_ADDRESSES;
+
+ LIST_FOREACH(addresses, address, link->network->addresses) {
+ r = address_configure(address, link, &address_handler);
+ if (r < 0)
+ link_enter_failed(link);
+ }
+
+ return 0;
+}
+
+static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("Could not bring up interface %d: %s",
+ link->ifindex, strerror(-r));
+ return link_enter_failed(link);
+ }
+
+ link->flags |= IFF_UP;
+
+ log_info("Link is UP.");
+
+ if (link->state == LINK_STATE_ROUTES_SET)
+ return link_enter_configured(link);
+
+ return 1;
+}
+
+static int link_up(Link *link) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req);
if (r < 0) {
log_error("Could not allocate RTM_NEWLINK message");
return r;
}
- r = sd_rtnl_call(manager->rtnl, req, 0, NULL);
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL);
if (r < 0) {
- log_error("Could not UP link: %s", strerror(-r));
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
return r;
}
- log_info("Link is UP");
+ return 0;
+}
+
+int link_configure(Link *link) {
+ int r;
+
+ r = link_up(link);
+ if (r < 0)
+ return link_enter_failed(link);
+
+ r = link_enter_set_addresses(link);
+ if (r < 0)
+ return link_enter_failed(link);
return 0;
}
LIST_FIELDS(Route, routes);
};
+typedef enum LinkState {
+ LINK_STATE_SET_ADDRESSES,
+ LINK_STATE_ADDRESSES_SET,
+ LINK_STATE_SET_ROUTES,
+ LINK_STATE_ROUTES_SET,
+ LINK_STATE_CONFIGURED,
+ LINK_STATE_FAILED,
+ _LINK_STATE_MAX,
+ _LINK_STATE_INVALID = -1
+} LinkState;
+
struct Link {
Manager *manager;
unsigned flags;
Network *network;
+
+ LinkState state;
+
+ unsigned rtnl_messages;
};
struct Manager {
int manager_udev_enumerate_links(Manager *m);
int manager_udev_listen(Manager *m);
+int manager_rtnl_listen(Manager *m);
+
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
#define _cleanup_manager_free_ _cleanup_(manager_freep)
/* Route */
int route_new(Network *network, Route **ret);
void route_free(Route *route);
-int route_configure(Manager *manager, Route *route, Link *link);
+int route_configure(Route *route, Link *link, sd_rtnl_message_handler_t callback);
DEFINE_TRIVIAL_CLEANUP_FUNC(Route*, route_free);
#define _cleanup_route_free_ _cleanup_(route_freep)
/* Address */
int address_new(Network *network, Address **ret);
void address_free(Address *address);
-int address_configure(Manager *manager, Address *address, Link *link);
+int address_configure(Address *address, Link *link, sd_rtnl_message_handler_t callback);
DEFINE_TRIVIAL_CLEANUP_FUNC(Address*, address_free);
#define _cleanup_address_free_ _cleanup_(address_freep)
int link_new(Manager *manager, struct udev_device *device, Link **ret);
void link_free(Link *link);
int link_add(Manager *manager, struct udev_device *device);
-int link_up(Manager *manager, Link *link);
+int link_configure(Link *link);
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
#define _cleanup_link_free_ _cleanup_(link_freep)