#include "networkd.h"
#include "libudev-private.h"
#include "util.h"
+#include "bus-util.h"
int link_new(Manager *manager, struct udev_device *device, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
free(link);
}
-int link_add(Manager *m, struct udev_device *device) {
+int link_add(Manager *m, struct udev_device *device, Link **ret) {
Link *link;
Network *network;
int r;
ifindex = udev_device_get_ifindex(device);
link = hashmap_get(m->links, &ifindex);
- if (link)
- return 0;
+ if (link) {
+ *ret = link;
+ return -EEXIST;
+ }
r = link_new(m, device, &link);
- if (r < 0) {
- log_error("Could not create link: %s", strerror(-r));
+ if (r < 0)
return r;
- }
+
+ *ret = link;
devtype = udev_device_get_devtype(device);
if (streq_ptr(devtype, "bridge")) {
r = bridge_set_link(m, link);
- if (r < 0)
- return r == -ENOENT ? 0 : r;
+ if (r < 0 && r != -ENOENT)
+ return r;
}
r = network_get(m, device, &network);
assert(link);
assert(link->state == LINK_STATE_SETTING_ROUTES);
- log_info("Link '%s' configured", link->ifname);
+ log_info_link(link, "link configured");
link->state = LINK_STATE_CONFIGURED;
static void link_enter_failed(Link *link) {
assert(link);
+ log_warning_link(link, "failed");
+
link->state = LINK_STATE_FAILED;
}
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST)
- log_warning("Could not set route on interface '%s': %s",
- link->ifname, strerror(-r));
+ log_warning_link(link, "could not set route: %s", strerror(-r));
/* we might have received an old reply after moving back to SETTING_ADDRESSES,
* ignore it */
if (link->route_messages == 0 && link->state == LINK_STATE_SETTING_ROUTES) {
- log_info("Routes set for link '%s'", link->ifname);
+ log_debug_link(link, "routes set");
link_enter_configured(link);
}
if (!link->network->static_routes && !link->dhcp_route)
return link_enter_configured(link);
+ log_debug_link(link, "setting routes");
+
LIST_FOREACH(static_routes, route, link->network->static_routes) {
r = route_configure(route, link, &route_handler);
if (r < 0) {
- log_warning("Could not set routes for link '%s'", link->ifname);
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
link_enter_failed(link);
return r;
}
if (link->dhcp_route) {
r = route_configure(link->dhcp_route, link, &route_handler);
if (r < 0) {
- log_warning("Could not set routes for link '%s'", link->ifname);
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
link_enter_failed(link);
return r;
}
r = sd_rtnl_message_get_errno(m);
if (r < 0 && r != -EEXIST)
- log_warning("Could not set address on interface '%s': %s",
- link->ifname, strerror(-r));
+ log_struct_link(LOG_ERR, link,
+ "MESSAGE=%s: could not set address: %s",
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
if (link->addr_messages == 0) {
- log_info("Addresses set for link '%s'", link->ifname);
+ log_debug_link(link, "addresses set");
link_enter_set_routes(link);
}
if (!link->network->static_addresses && !link->dhcp_address)
return link_enter_set_routes(link);
+ log_debug_link(link, "setting addresses");
+
LIST_FOREACH(static_addresses, address, link->network->static_addresses) {
r = address_configure(address, link, &address_handler);
if (r < 0) {
- log_warning("Could not set addresses for link '%s'", link->ifname);
+ log_warning_link(link,
+ "could not set addresses: %s", strerror(-r));
link_enter_failed(link);
return r;
}
if (link->dhcp_address) {
r = address_configure(link->dhcp_address, link, &address_handler);
if (r < 0) {
- log_warning("Could not set addresses for link '%s'", link->ifname);
+ log_warning_link(link,
+ "could not set addresses: %s", strerror(-r));
link_enter_failed(link);
return r;
}
return 0;
}
-static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_warning("Could not bring up interface '%s': %s",
- link->ifname, strerror(-r));
- link_enter_failed(link);
- }
+ if (r < 0 && r != -EEXIST)
+ log_warning_link(link, "could not drop address: %s", strerror(-r));
return 1;
}
-static int link_up(Link *link) {
- _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
int r;
- assert(link);
- assert(link->manager);
- assert(link->manager->rtnl);
+ r = sd_bus_message_get_errno(m);
+ if (r < 0)
+ log_warning("Could not set hostname: %s", strerror(-r));
- r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req);
- if (r < 0) {
- log_error("Could not allocate RTM_SETLINK message");
- return r;
- }
+ return 1;
+}
- r = sd_rtnl_message_link_set_flags(req, IFF_UP);
- if (r < 0) {
- log_error("Could not set link flags");
- return r;
- }
+static int set_hostname(sd_bus *bus, const char *hostname) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r = 0;
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
- if (r < 0) {
- log_error("Could not send rtnetlink message: %s", strerror(-r));
- return r;
- }
+ assert(bus);
+ assert(hostname);
- return 0;
-}
+ log_debug("Setting transient hostname: '%s'", hostname);
-static int link_bridge_joined(Link *link) {
- int r;
-
- assert(link);
- assert(link->state == LINK_STATE_JOINING_BRIDGE);
- assert(link->network);
+ r = sd_bus_message_new_method_call(
+ bus,
+ "org.freedesktop.hostname1",
+ "/org/freedesktop/hostname1",
+ "org.freedesktop.hostname1",
+ "SetHostname",
+ &m);
+ if (r < 0)
+ return r;
- r = link_up(link);
- if (r < 0) {
- link_enter_failed(link);
+ r = sd_bus_message_append(m, "sb", hostname, false);
+ if (r < 0)
return r;
- }
- if (!link->network->dhcp) {
- r = link_enter_set_addresses(link);
- if (r < 0)
- link_enter_failed(link);
- return r;
- }
+ r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL);
+ if (r < 0)
+ log_error("Could not set transient hostname: %s", strerror(-r));
- return 0;
+ return r;
}
-static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
- assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED);
- assert(link->network);
+ assert(m);
+ assert(link);
+ assert(link->ifname);
if (link->state == LINK_STATE_FAILED)
return 1;
r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_warning("Could not join interface '%s' to bridge '%s': %s",
- link->ifname, link->network->bridge->name, strerror(-r));
- link_enter_failed(link);
- return 1;
- } else
- log_info("Join interface '%s' to bridge: %s",
- link->ifname, link->network->bridge->name);
-
- link_bridge_joined(link);
-
- return 1;
-}
-
-static int link_enter_join_bridge(Link *link) {
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
-
- link->state = LINK_STATE_JOINING_BRIDGE;
-
- if (!link->network->bridge)
- return link_bridge_joined(link);
-
- r = bridge_join(link->network->bridge, link, &bridge_handler);
- if (r < 0) {
- log_warning("Could not join link '%s' to bridge '%s'", link->ifname,
- link->network->bridge->name);
- link_enter_failed(link);
- return r;
- }
-
- return 0;
-}
-
-static int link_get_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 get state of interface '%s': %s",
- link->ifname, strerror(-r));
- link_enter_failed(link);
- }
-
- link_update(link, m);
+ if (r < 0 && r != -EEXIST)
+ log_warning_link(link, "Could not set MTU: %s", strerror(-r));
return 1;
}
-static int link_get(Link *link) {
+static int link_set_mtu(Link *link, uint32_t mtu) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
assert(link->manager);
assert(link->manager->rtnl);
- r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req);
+ log_debug_link(link, "setting MTU: %" PRIu32, mtu);
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req);
if (r < 0) {
- log_error("Could not allocate RTM_GETLINK message");
+ log_error_link(link, "Could not allocate RTM_SETLINK message");
return r;
}
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL);
+ r = sd_rtnl_message_append_u32(req, IFLA_MTU, mtu);
if (r < 0) {
- log_error("Could not send rtnetlink message: %s", strerror(-r));
+ log_error_link(link, "Could not append MTU: %s", strerror(-r));
return r;
}
- return 0;
-}
-
-int link_configure(Link *link) {
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
-
- r = link_get(link);
+ r = sd_rtnl_call_async(link->manager->rtnl, req, set_mtu_handler, link, 0, NULL);
if (r < 0) {
- link_enter_failed(link);
+ log_error_link(link,
+ "Could not send rtnetlink message: %s", strerror(-r));
return r;
}
- r = link_enter_join_bridge(link);
- if (r < 0)
- return r;
-
return 0;
}
-static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
- int r;
-
- assert(m);
- assert(link);
- assert(link->ifname);
-
- if (link->state == LINK_STATE_FAILED)
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST)
- log_warning("Could not drop address from interface '%s': %s",
- link->ifname, strerror(-r));
-
- return 1;
-}
-
static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
struct in_addr address;
int prefixlen;
int r;
+ assert(link);
+ assert(link->network);
+ assert(link->manager);
+
if (link->state == LINK_STATE_FAILED)
return;
if (event < 0) {
- log_warning("DHCP error: %s", strerror(-event));
+ log_warning_link(link, "DHCP error: %s", strerror(-event));
link_enter_failed(link);
return;
}
if (event == DHCP_EVENT_NO_LEASE)
- log_info("IP address in use.");
+ log_debug_link(link, "IP address in use.");
if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED ||
event == DHCP_EVENT_STOP) {
- address_drop(link->dhcp_address, link, address_drop_handler);
+ if (link->dhcp_address) {
+ address_drop(link->dhcp_address, link, address_drop_handler);
- address_free(link->dhcp_address);
- link->dhcp_address = NULL;
+ address_free(link->dhcp_address);
+ link->dhcp_address = NULL;
+ }
+
+ if (link->dhcp_route) {
+ route_free(link->dhcp_route);
+ link->dhcp_route = NULL;
+ }
+
+ if (link->network->dhcp_mtu) {
+ uint16_t mtu;
+
+ r = sd_dhcp_client_get_mtu(client, &mtu);
+ if (r >= 0 && link->original_mtu != mtu) {
+ r = link_set_mtu(link, link->original_mtu);
+ if (r < 0) {
+ log_warning_link(link, "DHCP error: could not reset MTU");
+ link_enter_failed(link);
+ return;
+ }
+ }
+ }
- route_free(link->dhcp_route);
- link->dhcp_route = NULL;
+ if (link->network->dhcp_hostname) {
+ r = set_hostname(link->manager->bus, "");
+ if (r < 0)
+ log_error("Failed to reset transient hostname");
+ }
}
r = sd_dhcp_client_get_address(client, &address);
if (r < 0) {
- log_warning("DHCP error: no address");
+ log_warning_link(link, "DHCP error: no address");
link_enter_failed(link);
return;
}
r = sd_dhcp_client_get_netmask(client, &netmask);
if (r < 0) {
- log_warning("DHCP error: no netmask");
+ log_warning_link(link, "DHCP error: no netmask");
link_enter_failed(link);
return;
}
prefixlen = sd_dhcp_client_prefixlen(&netmask);
if (prefixlen < 0) {
- log_warning("DHCP error: no prefixlen");
+ log_warning_link(link, "DHCP error: no prefixlen");
link_enter_failed(link);
return;
}
r = sd_dhcp_client_get_router(client, &gateway);
if (r < 0) {
- log_warning("DHCP error: no router");
+ log_warning_link(link, "DHCP error: no router");
link_enter_failed(link);
return;
}
if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) {
_cleanup_address_free_ Address *addr = NULL;
_cleanup_route_free_ Route *rt = NULL;
-
- log_info("Received config over DHCPv4");
+ struct in_addr **nameservers;
+
+ log_struct_link(LOG_INFO, link,
+ "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
+ link->ifname,
+ ADDRESS_FMT_VAL(address),
+ prefixlen,
+ ADDRESS_FMT_VAL(gateway),
+ "ADDRESS=%u.%u.%u.%u",
+ ADDRESS_FMT_VAL(address),
+ "PREFIXLEN=%u",
+ prefixlen,
+ "GATEWAY=%u.%u.%u.%u",
+ ADDRESS_FMT_VAL(gateway),
+ NULL);
r = address_new_dynamic(&addr);
if (r < 0) {
- log_error("Could not allocate address");
+ log_error_link(link, "Could not allocate address");
link_enter_failed(link);
return;
}
r = route_new_dynamic(&rt);
if (r < 0) {
- log_error("Could not allocate route");
+ log_error_link(link, "Could not allocate route");
link_enter_failed(link);
return;
}
addr = NULL;
rt = NULL;
+ if (link->network->dhcp_dns) {
+ r = sd_dhcp_client_get_dns(client, &nameservers);
+ if (r >= 0) {
+ r = manager_update_resolv_conf(link->manager);
+ if (r < 0)
+ log_error("Failed to update resolv.conf");
+ }
+ }
+
+ if (link->network->dhcp_mtu) {
+ uint16_t mtu;
+
+ r = sd_dhcp_client_get_mtu(client, &mtu);
+ if (r >= 0) {
+ r = link_set_mtu(link, mtu);
+ if (r < 0)
+ log_error_link(link, "Failed to set MTU "
+ "to %" PRIu16, mtu);
+ }
+ }
+
+ if (link->network->dhcp_hostname) {
+ const char *hostname;
+
+ r = sd_dhcp_client_get_hostname(client, &hostname);
+ if (r >= 0) {
+ r = set_hostname(link->manager->bus, hostname);
+ if (r < 0)
+ log_error("Failed to set transient hostname "
+ "to '%s'", hostname);
+ }
+ }
+
link_enter_set_addresses(link);
}
r = sd_dhcp_client_set_callback(link->dhcp, dhcp_handler, link);
if (r < 0)
return r;
+
+ if (link->network->dhcp_mtu) {
+ r = sd_dhcp_client_set_request_option(link->dhcp, 26);
+ if (r < 0)
+ return r;
+ }
}
+ log_debug_link(link, "acquiring DHCPv4 lease");
+
r = sd_dhcp_client_start(link->dhcp);
if (r < 0)
return r;
return 0;
}
-int link_update(Link *link, sd_rtnl_message *m) {
- unsigned flags;
+static int link_update_flags(Link *link, unsigned flags) {
int r;
assert(link);
- assert(m);
+ assert(link->network);
- r = sd_rtnl_message_link_get_flags(m, &flags);
+ if (link->state == LINK_STATE_FAILED)
+ return 0;
+
+ if (link->flags == flags) {
+ log_debug_link(link, "link status unchanged: %#.8x", flags);
+ return 0;
+ }
+
+ if ((link->flags & IFF_UP) != (flags & IFF_UP))
+ log_info_link(link,
+ "power %s", flags & IFF_UP ? "on": "off");
+
+ if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
+ if (flags & IFF_LOWER_UP) {
+ log_info_link(link, "carrier on");
+
+ if (link->network->dhcp) {
+ r = link_acquire_conf(link);
+ if (r < 0) {
+ log_warning_link(link, "Could not acquire DHCPv4 lease: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+ }
+ } else {
+ log_info_link(link, "carrier off");
+
+ if (link->network->dhcp) {
+ r = sd_dhcp_client_stop(link->dhcp);
+ if (r < 0) {
+ log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+ }
+ }
+ }
+
+ log_debug_link(link,
+ "link status updated: %#.8x -> %#.8x", link->flags, flags);
+
+ link->flags = flags;
+
+ return 0;
+}
+
+static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
if (r < 0) {
- log_warning("Could not get link flags of '%s'", link->ifname);
+ log_warning_link(link,
+ "could not bring up interface: %s", strerror(-r));
+ link_enter_failed(link);
+ }
+
+ link_update_flags(link, link->flags | IFF_UP);
+
+ 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);
+
+ log_debug_link(link, "bringing link up");
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, &req);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate RTM_SETLINK message");
return r;
}
- if (link->flags & IFF_UP && !(flags & IFF_UP))
- log_info("Interface '%s' is down", link->ifname);
- else if (!(link->flags & IFF_UP) && flags & IFF_UP)
- log_info("Interface '%s' is up", link->ifname);
+ r = sd_rtnl_message_link_set_flags(req, IFF_UP);
+ if (r < 0) {
+ log_error_link(link, "Could not set link flags: %s", strerror(-r));
+ return r;
+ }
- if (link->flags & IFF_LOWER_UP && !(flags & IFF_LOWER_UP)) {
- log_info("Interface '%s' is disconnected", link->ifname);
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link, 0, NULL);
+ if (r < 0) {
+ log_error_link(link,
+ "Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
- if (link->network->dhcp) {
- r = sd_dhcp_client_stop(link->dhcp);
- if (r < 0) {
- link_enter_failed(link);
- return r;
- }
- }
- } else if (!(link->flags & IFF_LOWER_UP) && flags & IFF_LOWER_UP) {
- log_info("Interface '%s' is connected", link->ifname);
+ return 0;
+}
- if (link->network->dhcp) {
- r = link_acquire_conf(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
- }
- }
+static int link_bridge_joined(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->state == LINK_STATE_JOINING_BRIDGE);
+ assert(link->network);
+
+ r = link_up(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
}
- link->flags = flags;
+ if (!link->network->dhcp)
+ return link_enter_set_addresses(link);
+
+ return 0;
+}
+
+static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED);
+ assert(link->network);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_struct_link(LOG_ERR, link,
+ "MESSAGE=%s: could not join bridge '%s': %s",
+ link->ifname, link->network->bridge->name, strerror(-r),
+ BRIDGE(link->network->bridge),
+ NULL);
+ link_enter_failed(link);
+ return 1;
+ }
+
+ log_struct_link(LOG_DEBUG, link,
+ "MESSAGE=%s: joined bridge '%s'",
+ link->network->bridge->name,
+ BRIDGE(link->network->bridge),
+ NULL);
+
+ link_bridge_joined(link);
+
+ return 1;
+}
+
+static int link_enter_join_bridge(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->state == _LINK_STATE_INVALID);
+
+ link->state = LINK_STATE_JOINING_BRIDGE;
+
+ if (!link->network->bridge)
+ return link_bridge_joined(link);
+
+ log_struct_link(LOG_DEBUG, link,
+ "MESSAGE=%s: joining bridge '%s'",
+ link->network->bridge->name,
+ BRIDGE(link->network->bridge),
+ NULL);
+ log_debug_link(link, "joining bridge");
+
+ r = bridge_join(link->network->bridge, link, &bridge_handler);
+ if (r < 0) {
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not join bridge '%s': %s",
+ link->network->bridge->name, strerror(-r),
+ BRIDGE(link->network->bridge),
+ NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ return 0;
+}
+
+static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning_link(link, "could not get state: %s", strerror(-r));
+ link_enter_failed(link);
+ }
+
+ log_debug_link(link, "got link state");
+
+ link_update(link, m);
+
+ return 1;
+}
+
+static int link_get(Link *link) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
+ log_debug_link(link, "requesting link status");
+
+ r = sd_rtnl_message_link_new(RTM_GETLINK, link->ifindex, &req);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate RTM_GETLINK message");
+ return r;
+ }
+
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_get_handler, link, 0, NULL);
+ if (r < 0) {
+ log_error_link(link,
+ "Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
return 0;
}
+
+int link_configure(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->state == _LINK_STATE_INVALID);
+
+ r = link_get(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
+
+ return link_enter_join_bridge(link);
+}
+
+int link_update(Link *link, sd_rtnl_message *m) {
+ unsigned flags;
+ void *data;
+ uint16_t type;
+ int r;
+
+ assert(link);
+ assert(m);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 0;
+
+ r = sd_rtnl_message_link_get_flags(m, &flags);
+ if (r < 0) {
+ log_warning_link(link, "Could not get link flags");
+ return r;
+ }
+
+ while (sd_rtnl_message_read(m, &type, &data) > 0) {
+ if (type == IFLA_MTU && link->network->dhcp &&
+ link->network->dhcp_mtu && !link->original_mtu) {
+ link->original_mtu = *(uint16_t *) data;
+ log_debug_link(link, "saved original MTU: %" PRIu16,
+ link->original_mtu);
+ }
+ }
+
+ return link_update_flags(link, flags);
+}
~ianmdlvl / elogind.git / blobdiff