#include "networkd.h"
#include "libudev-private.h"
+#include "udev-util.h"
#include "util.h"
+#include "virt.h"
#include "bus-util.h"
-#include "net-util.h"
+#include "network-internal.h"
-int link_new(Manager *manager, struct udev_device *device, Link **ret) {
+#include "dhcp-lease-internal.h"
+
+static int ipv4ll_address_update(Link *link, bool deprecate);
+static bool ipv4ll_is_bound(sd_ipv4ll *ll);
+
+static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
- const char *mac;
- struct ether_addr *mac_addr;
- const char *ifname;
- int r;
+ uint16_t type;
+ char *ifname;
+ int r, ifindex;
- assert(device);
+ assert(manager);
+ assert(manager->links);
+ assert(message);
assert(ret);
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0)
+ return r;
+ else if (type != RTM_NEWLINK)
+ return -EINVAL;
+
+ r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ if (r < 0)
+ return r;
+ else if (ifindex <= 0)
+ return -EINVAL;
+
+ r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
+ if (r < 0)
+ return r;
+
link = new0(Link, 1);
if (!link)
return -ENOMEM;
link->manager = manager;
- link->state = _LINK_STATE_INVALID;
-
- link->ifindex = udev_device_get_ifindex(device);
- if (link->ifindex <= 0)
- return -EINVAL;
-
- mac = udev_device_get_sysattr_value(device, "address");
- if (mac) {
- mac_addr = ether_aton(mac);
- if (mac_addr)
- memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
- }
-
- ifname = udev_device_get_sysname(device);
+ link->state = LINK_STATE_INITIALIZING;
+ link->ifindex = ifindex;
link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
+
+ r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
r = hashmap_put(manager->links, &link->ifindex, link);
if (r < 0)
assert(link->manager);
- sd_dhcp_client_free(link->dhcp_client);
+ sd_dhcp_client_unref(link->dhcp_client);
sd_dhcp_lease_unref(link->dhcp_lease);
+ sd_ipv4ll_unref(link->ipv4ll);
+
hashmap_remove(link->manager->links, &link->ifindex);
free(link->ifname);
+ free(link->state_file);
+
+ udev_device_unref(link->udev_device);
free(link);
}
-int link_add(Manager *m, struct udev_device *device, Link **ret) {
+int link_get(Manager *m, int ifindex, Link **ret) {
Link *link;
- Network *network;
- int r;
- uint64_t ifindex;
+ uint64_t ifindex_64;
assert(m);
- assert(device);
-
- ifindex = udev_device_get_ifindex(device);
- link = hashmap_get(m->links, &ifindex);
- if (link) {
- *ret = link;
- return -EEXIST;
- }
+ assert(m->links);
+ assert(ifindex);
+ assert(ret);
- r = link_new(m, device, &link);
- if (r < 0)
- return r;
+ ifindex_64 = ifindex;
+ link = hashmap_get(m->links, &ifindex_64);
+ if (!link)
+ return -ENODEV;
*ret = link;
- r = network_get(m, device, &network);
- if (r < 0)
- return r == -ENOENT ? 0 : r;
-
- r = network_apply(m, network, link);
- if (r < 0)
- return r;
-
return 0;
}
link->state = LINK_STATE_CONFIGURED;
+ link_save(link);
+
return 0;
}
+static void link_enter_unmanaged(Link *link) {
+ assert(link);
+
+ log_info_link(link, "unmanaged");
+
+ link->state = LINK_STATE_UNMANAGED;
+
+ link_save(link);
+}
+
static void link_enter_failed(Link *link) {
assert(link);
log_warning_link(link, "failed");
link->state = LINK_STATE_FAILED;
+
+ link_save(link);
}
static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
link->state = LINK_STATE_SETTING_ROUTES;
- if (!link->network->static_routes && !link->dhcp_lease)
+ if (!link->network->static_routes && !link->dhcp_lease &&
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_configured(link);
log_debug_link(link, "setting routes");
link->route_messages ++;
}
+ if (link->ipv4ll && !link->dhcp_lease) {
+ _cleanup_route_free_ Route *route = NULL;
+ struct in_addr addr;
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "IPV4LL error: no address: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (r != -ENOENT) {
+ r = route_new_dynamic(&route);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
+
+ route->family = AF_INET;
+ route->scope = RT_SCOPE_LINK;
+ route->metrics = 99;
+
+ r = route_configure(route, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set routes: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->route_messages ++;
+ }
+ }
+
if (link->dhcp_lease) {
_cleanup_route_free_ Route *route = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
struct in_addr gateway;
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
return r;
}
+ r = route_new_dynamic(&route_gw);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
+
+ /* The dhcp netmask may mask out the gateway. Add an explicit
+ * route for the gw host so that we can route no matter the
+ * netmask or existing kernel route tables. */
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ r = route_configure(route_gw, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set host route: %s", strerror(-r));
+ return r;
+ }
+
+ link->route_messages ++;
+
route->family = AF_INET;
route->in_addr.in = gateway;
return 0;
}
+static int route_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 != -ENOENT)
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not drop route: %s",
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ return 0;
+}
+
static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
link->state = LINK_STATE_SETTING_ADDRESSES;
- if (!link->network->static_addresses && !link->dhcp_lease)
+ if (!link->network->static_addresses && !link->dhcp_lease &&
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_set_routes(link);
log_debug_link(link, "setting addresses");
link->addr_messages ++;
}
+ if (link->ipv4ll && !link->dhcp_lease) {
+ _cleanup_address_free_ Address *ll_addr = NULL;
+ struct in_addr addr;
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r < 0 && r != -ENOENT) {
+ log_warning_link(link, "IPV4LL error: no address: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (r != -ENOENT) {
+ r = address_new_dynamic(&ll_addr);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
+
+ ll_addr->family = AF_INET;
+ ll_addr->in_addr.in = addr;
+ ll_addr->prefixlen = 16;
+ ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
+ ll_addr->scope = RT_SCOPE_LINK;
+
+ r = address_configure(ll_addr, link, &address_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set addresses: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->addr_messages ++;
+ }
+ }
+
if (link->dhcp_lease) {
_cleanup_address_free_ Address *address = NULL;
struct in_addr addr;
return 0;
}
+static int address_update_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 != -ENOENT)
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not update address: %s",
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ return 0;
+}
+
static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
"ERRNO=%d", -r,
NULL);
- return 1;
+ return 0;
}
static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
r = sd_bus_message_new_method_call(
bus,
+ &m,
"org.freedesktop.hostname1",
"/org/freedesktop/hostname1",
"org.freedesktop.hostname1",
- "SetHostname",
- &m);
+ "SetHostname");
if (r < 0)
return r;
log_debug_link(link, "setting MTU: %" PRIu32, mtu);
- r = sd_rtnl_message_new_link(RTM_SETLINK, link->ifindex, &req);
+ r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
+ RTM_SETLINK, link->ifindex);
if (r < 0) {
log_error_link(link, "Could not allocate RTM_SETLINK message");
return r;
static int dhcp_lease_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
+ _cleanup_route_free_ Route *route = NULL;
struct in_addr addr;
struct in_addr netmask;
+ struct in_addr gateway;
unsigned prefixlen;
int r;
assert(link);
assert(link->dhcp_lease);
+ log_warning_link(link, "DHCP lease lost");
+
r = address_new_dynamic(&address);
if (r >= 0) {
sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
+ sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
prefixlen = net_netmask_to_prefixlen(&netmask);
+ r = route_new_dynamic(&route_gw);
+ if (r >= 0) {
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ route_drop(route_gw, link, &route_drop_handler);
+ }
+
+ r = route_new_dynamic(&route);
+ if (r >= 0) {
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
+
+ route_drop(route, link, &route_drop_handler);
+ }
+
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = prefixlen;
- address_drop(address, link, address_drop_handler);
+ address_drop(address, link, &address_drop_handler);
}
if (link->network->dhcp_mtu) {
}
if (link->network->dhcp_hostname) {
- r = set_hostname(link->manager->bus, "");
- if (r < 0)
- log_error("Failed to reset transient hostname");
+ const char *hostname = NULL;
+
+ r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
+ if (r >= 0 && hostname) {
+ r = set_hostname(link->manager->bus, "");
+ if (r < 0)
+ log_error("Failed to reset transient hostname");
+ }
}
link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
- int r;
+ int r = 0;
assert(link);
assert(link->network);
}
}
+ if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
+ if (!sd_ipv4ll_is_running(link->ipv4ll))
+ r = sd_ipv4ll_start(link->ipv4ll);
+ else if (ipv4ll_is_bound(link->ipv4ll))
+ r = ipv4ll_address_update(link, false);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ }
+
break;
case DHCP_EVENT_IP_ACQUIRE:
r = dhcp_lease_acquired(client, link);
link_enter_failed(link);
return;
}
+ if (link->ipv4ll) {
+ if (ipv4ll_is_bound(link->ipv4ll))
+ r = ipv4ll_address_update(link, true);
+ else
+ r = sd_ipv4ll_stop(link->ipv4ll);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ }
break;
default:
if (event < 0)
return;
}
-static int link_acquire_conf(Link *link) {
+static int ipv4ll_address_update(Link *link, bool deprecate) {
int r;
+ struct in_addr addr;
assert(link);
- assert(link->network);
- assert(link->network->dhcp);
- assert(link->manager);
- assert(link->manager->event);
-
- if (!link->dhcp_client) {
- r = sd_dhcp_client_new(&link->dhcp_client);
- if (r < 0)
- return r;
-
- r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
- if (r < 0)
- return r;
- r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
- if (r < 0)
- return r;
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r >= 0) {
+ _cleanup_address_free_ Address *address = NULL;
- r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
- if (r < 0)
- return r;
+ log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u",
+ deprecate ? "deprecate" : "approve",
+ ADDRESS_FMT_VAL(addr));
- r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
- if (r < 0)
+ r = address_new_dynamic(&address);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
return r;
-
- if (link->network->dhcp_mtu) {
- r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
- if (r < 0)
- return r;
}
- }
- log_debug_link(link, "acquiring DHCPv4 lease");
+ address->family = AF_INET;
+ address->in_addr.in = addr;
+ address->prefixlen = 16;
+ address->scope = RT_SCOPE_LINK;
+ address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME;
+ address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
- r = sd_dhcp_client_start(link->dhcp_client);
- if (r < 0)
- return r;
+ address_update(address, link, &address_update_handler);
+ }
return 0;
+
}
-static int link_update_flags(Link *link, unsigned flags) {
+static int ipv4ll_address_lost(Link *link) {
int r;
+ struct in_addr addr;
assert(link);
- assert(link->network);
- if (link->state == LINK_STATE_FAILED)
- return 0;
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r >= 0) {
+ _cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route = NULL;
- if (link->flags == flags) {
- log_debug_link(link, "link status unchanged: %#.8x", flags);
- return 0;
- }
+ log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
+ ADDRESS_FMT_VAL(addr));
- if ((link->flags & IFF_UP) != (flags & IFF_UP))
- log_info_link(link,
- "link is %s", flags & IFF_UP ? "up": "down");
+ r = address_new_dynamic(&address);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
- if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
- if (flags & IFF_LOWER_UP) {
- log_info_link(link, "carrier on");
+ address->family = AF_INET;
+ address->in_addr.in = addr;
+ address->prefixlen = 16;
+ address->scope = RT_SCOPE_LINK;
- 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");
+ address_drop(address, link, &address_drop_handler);
- if (link->network->dhcp) {
- r = sd_dhcp_client_stop(link->dhcp_client);
- if (r < 0) {
- log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
- }
+ r = route_new_dynamic(&route);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
}
- }
- log_debug_link(link,
- "link status updated: %#.8x -> %#.8x", link->flags, flags);
+ route->family = AF_INET;
+ route->scope = RT_SCOPE_LINK;
+ route->metrics = 99;
- link->flags = flags;
+ route_drop(route, link, &route_drop_handler);
+ }
return 0;
}
-static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
+static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
+ int r;
+ struct in_addr addr;
+
+ assert(ll);
+
+ r = sd_ipv4ll_get_address(ll, &addr);
+ if (r < 0)
+ return false;
+ return true;
+}
+
+static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
+ struct in_addr address;
int r;
+ assert(ll);
assert(link);
- if (link->state == LINK_STATE_FAILED)
- return 1;
+ r = sd_ipv4ll_get_address(ll, &address);
+ if (r < 0)
+ return r;
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_struct_link(LOG_ERR, link,
+ log_struct_link(LOG_INFO, link,
+ "MESSAGE=%s: IPv4 link-local address %u.%u.%u.%u",
+ link->ifname,
+ ADDRESS_FMT_VAL(address),
+ NULL);
+
+ link_enter_set_addresses(link);
+
+ return 0;
+}
+
+static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->manager);
+
+ switch(event) {
+ case IPV4LL_EVENT_STOP:
+ case IPV4LL_EVENT_CONFLICT:
+ r = ipv4ll_address_lost(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ case IPV4LL_EVENT_BIND:
+ r = ipv4ll_address_claimed(ll, link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ default:
+ if (event < 0)
+ log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
+ else
+ log_warning_link(link, "IPv4 link-local unknown event: %d", event);
+ break;
+ }
+}
+
+static int link_acquire_conf(Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->manager);
+ assert(link->manager->event);
+
+ if (link->network->ipv4ll) {
+ assert(link->ipv4ll);
+
+ log_debug_link(link, "acquiring IPv4 link-local address");
+
+ r = sd_ipv4ll_start(link->ipv4ll);
+ if (r < 0)
+ return r;
+ }
+
+ if (link->network->dhcp) {
+ assert(link->dhcp_client);
+
+ log_debug_link(link, "acquiring DHCPv4 lease");
+
+ r = sd_dhcp_client_start(link->dhcp_client);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int link_update_flags(Link *link, unsigned flags) {
+ unsigned flags_added, flags_removed, generic_flags;
+ bool carrier_gained, carrier_lost;
+ int r;
+
+ assert(link);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 0;
+
+ if (link->flags == flags)
+ return 0;
+
+ flags_added = (link->flags ^ flags) & flags;
+ flags_removed = (link->flags ^ flags) & link->flags;
+ generic_flags = ~(IFF_UP | IFF_LOWER_UP | IFF_DORMANT | IFF_DEBUG |
+ IFF_MULTICAST | IFF_BROADCAST | IFF_PROMISC |
+ IFF_NOARP | IFF_MASTER | IFF_SLAVE);
+
+ /* consider link to have carrier when LOWER_UP and !DORMANT
+
+ TODO: use proper operstates once we start supporting 802.1X
+
+ see Documentation/networking/operstates.txt in the kernel sources
+ */
+ carrier_gained = (((flags_added & IFF_LOWER_UP) && !(flags & IFF_DORMANT)) ||
+ ((flags_removed & IFF_DORMANT) && (flags & IFF_LOWER_UP)));
+ carrier_lost = ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) &&
+ ((flags_removed & IFF_LOWER_UP) || (flags_added & IFF_DORMANT));
+
+ link->flags = flags;
+
+ if (!link->network)
+ /* not currently managing this link
+ we track state changes, but don't log them
+ they will be logged if and when a network is
+ applied */
+ return 0;
+
+ if (flags_added & IFF_UP)
+ log_info_link(link, "link is up");
+ else if (flags_removed & IFF_UP)
+ log_info_link(link, "link is down");
+
+ if (flags_added & IFF_LOWER_UP)
+ log_debug_link(link, "link is lower up");
+ else if (flags_removed & IFF_LOWER_UP)
+ log_debug_link(link, "link is lower down");
+
+ if (flags_added & IFF_DORMANT)
+ log_debug_link(link, "link is dormant");
+ else if (flags_removed & IFF_DORMANT)
+ log_debug_link(link, "link is not dormant");
+
+ if (flags_added & IFF_DEBUG)
+ log_debug_link(link, "debugging enabled in the kernel");
+ else if (flags_removed & IFF_DEBUG)
+ log_debug_link(link, "debugging disabled in the kernel");
+
+ if (flags_added & IFF_MULTICAST)
+ log_debug_link(link, "multicast enabled");
+ else if (flags_removed & IFF_MULTICAST)
+ log_debug_link(link, "multicast disabled");
+
+ if (flags_added & IFF_BROADCAST)
+ log_debug_link(link, "broadcast enabled");
+ else if (flags_removed & IFF_BROADCAST)
+ log_debug_link(link, "broadcast disabled");
+
+ if (flags_added & IFF_PROMISC)
+ log_debug_link(link, "promiscuous mode enabled");
+ else if (flags_removed & IFF_PROMISC)
+ log_debug_link(link, "promiscuous mode disabled");
+
+ if (flags_added & IFF_NOARP)
+ log_debug_link(link, "ARP protocol disabled");
+ else if (flags_removed & IFF_NOARP)
+ log_debug_link(link, "ARP protocol enabled");
+
+ if (flags_added & IFF_MASTER)
+ log_debug_link(link, "link is master");
+ else if (flags_removed & IFF_MASTER)
+ log_debug_link(link, "link is no longer master");
+
+ if (flags_added & IFF_SLAVE)
+ log_debug_link(link, "link is slave");
+ else if (flags_removed & IFF_SLAVE)
+ log_debug_link(link, "link is no longer slave");
+
+ /* link flags are currently at most 18 bits, let's default to printing 20 */
+ if (flags_added & generic_flags)
+ log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)",
+ flags_added & generic_flags);
+
+ if (flags_removed & generic_flags)
+ log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)",
+ flags_removed & generic_flags);
+
+ if (carrier_gained) {
+ log_info_link(link, "gained carrier");
+
+ if (link->network->dhcp || link->network->ipv4ll) {
+ r = link_acquire_conf(link);
+ if (r < 0) {
+ log_warning_link(link, "Could not acquire configuration: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+ }
+ } else if (carrier_lost) {
+ log_info_link(link, "lost carrier");
+
+ if (link->network->dhcp) {
+ r = sd_dhcp_client_stop(link->dhcp_client);
+ if (r < 0) {
+ log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
+ link_enter_failed(link);
+ return r;
+ }
+ }
+
+ if (link->network->ipv4ll) {
+ r = sd_ipv4ll_stop(link->ipv4ll);
+ if (r < 0) {
+ log_warning_link(link, "Could not stop IPv4 link-local: %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) {
+ 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)
+ link_update_flags(link, link->flags | IFF_UP);
+ else
+ log_struct_link(LOG_WARNING, link,
"MESSAGE=%s: could not bring up interface: %s",
link->ifname, strerror(-r),
"ERRNO=%d", -r,
NULL);
- link_enter_failed(link);
- return 1;
- }
-
- link_update_flags(link, link->flags | IFF_UP);
-
return 1;
}
log_debug_link(link, "bringing link up");
- r = sd_rtnl_message_new_link(RTM_SETLINK, link->ifindex, &req);
+ r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
+ RTM_SETLINK, link->ifindex);
if (r < 0) {
log_error_link(link, "Could not allocate RTM_SETLINK message");
return r;
assert(link->state == LINK_STATE_ENSLAVING);
assert(link->network);
- r = link_up(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
+ if (!(link->flags & IFF_UP)) {
+ r = link_up(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
}
- if (!link->network->dhcp)
+ if (!link->network->dhcp && !link->network->ipv4ll)
return link_enter_set_addresses(link);
return 0;
}
static int link_enter_enslave(Link *link) {
- NetDev *vlan;
+ NetDev *vlan, *macvlan;
Iterator i;
int r;
assert(link);
assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(link->state == LINK_STATE_INITIALIZING);
link->state = LINK_STATE_ENSLAVING;
+ link_save(link);
+
if (!link->network->bridge && !link->network->bond &&
- hashmap_isempty(link->network->vlans))
+ hashmap_isempty(link->network->vlans) &&
+ hashmap_isempty(link->network->macvlans))
return link_enslaved(link);
if (link->network->bridge) {
link->enslaving ++;
}
+ if (link->network->bond) {
+ log_struct_link(LOG_DEBUG, link,
+ "MESSAGE=%s: enslaving by '%s'",
+ link->ifname, link->network->bond->name,
+ NETDEV(link->network->bond),
+ NULL);
+
+ r = netdev_enslave(link->network->bond, link, &enslave_handler);
+ if (r < 0) {
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not enslave by '%s': %s",
+ link->ifname, link->network->bond->name, strerror(-r),
+ NETDEV(link->network->bond),
+ NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->enslaving ++;
+ }
+
HASHMAP_FOREACH(vlan, link->network->vlans, i) {
log_struct_link(LOG_DEBUG, link,
"MESSAGE=%s: enslaving by '%s'",
link->enslaving ++;
}
+ HASHMAP_FOREACH(macvlan, link->network->macvlans, i) {
+ log_struct_link(LOG_DEBUG, link,
+ "MESSAGE=%s: enslaving by '%s'",
+ link->ifname, macvlan->name, NETDEV(macvlan), NULL);
+
+ r = netdev_enslave(macvlan, link, &enslave_handler);
+ if (r < 0) {
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not enslave by '%s': %s",
+ link->ifname, macvlan->name, strerror(-r),
+ NETDEV(macvlan), NULL);
+ link_enter_failed(link);
+ return r;
+ }
+
+ link->enslaving ++;
+ }
+
return 0;
}
-static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- Link *link = userdata;
+static int link_configure(Link *link) {
int r;
assert(link);
+ assert(link->state == LINK_STATE_INITIALIZING);
- if (link->state == LINK_STATE_FAILED)
- return 1;
+ if (link->network->ipv4ll) {
+ uint8_t seed[8];
+ r = sd_ipv4ll_new(&link->ipv4ll);
+ if (r < 0)
+ return r;
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not get state: %s",
- link->ifname, strerror(-r),
- "ERRNO=%d", -r,
- NULL);
- link_enter_failed(link);
- return 1;
+ if (link->udev_device) {
+ r = net_get_unique_predictable_data(link->udev_device, seed);
+ if (r >= 0) {
+ r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
+ if (r < 0)
+ return r;
}
- log_debug_link(link, "got link state");
+ if (link->network->dhcp) {
+ r = sd_dhcp_client_new(&link->dhcp_client);
+ if (r < 0)
+ return r;
- link_update(link, m);
+ r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
+ if (r < 0)
+ return r;
- return 1;
+ r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
+ if (r < 0)
+ return r;
+
+ if (link->network->dhcp_mtu) {
+ r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
+ if (r < 0)
+ return r;
+ }
+ }
+
+ return link_enter_enslave(link);
}
-static int link_get(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+int link_initialized(Link *link, struct udev_device *device) {
+ Network *network;
+ unsigned flags;
int r;
assert(link);
+ assert(link->ifname);
assert(link->manager);
- assert(link->manager->rtnl);
- log_debug_link(link, "requesting link status");
+ if (link->state != LINK_STATE_INITIALIZING)
+ return 0;
- r = sd_rtnl_message_new_link(RTM_GETLINK, link->ifindex, &req);
- if (r < 0) {
- log_error_link(link, "Could not allocate RTM_GETLINK message");
+ if (device)
+ link->udev_device = udev_device_ref(device);
+
+ log_debug_link(link, "link initialized");
+
+ r = network_get(link->manager, device, link->ifname, &link->mac, &network);
+ if (r == -ENOENT) {
+ link_enter_unmanaged(link);
+ return 0;
+ } else if (r < 0)
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));
+ r = network_apply(link->manager, network, link);
+ if (r < 0)
+ return r;
+
+ r = link_configure(link);
+ if (r < 0)
+ return r;
+
+ /* re-trigger all state updates */
+ flags = link->flags;
+ link->flags = 0;
+ r = link_update_flags(link, flags);
+ if (r < 0)
return r;
- }
return 0;
}
-int link_configure(Link *link) {
+int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
+ Link *link;
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+ char ifindex_str[2 + DECIMAL_STR_MAX(int)];
int r;
- assert(link);
- assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(m);
+ assert(message);
+ assert(ret);
- r = link_get(link);
- if (r < 0) {
- link_enter_failed(link);
+ r = link_new(m, message, ret);
+ if (r < 0)
return r;
+
+ link = *ret;
+
+ log_info_link(link, "link added");
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
+ device = udev_device_new_from_device_id(m->udev, ifindex_str);
+ if (!device) {
+ log_warning_link(link, "could not find udev device");
+ return -errno;
+ }
+
+ if (udev_device_get_is_initialized(device) <= 0)
+ /* not yet ready */
+ return 0;
}
- return link_enter_enslave(link);
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+
+ return 0;
}
int link_update(Link *link, sd_rtnl_message *m) {
unsigned flags;
- void *data;
- uint16_t type;
+ struct ether_addr mac;
+ char *ifname;
int r;
assert(link);
+ assert(link->ifname);
assert(m);
- if (link->state == LINK_STATE_FAILED)
+ if (link->state == LINK_STATE_FAILED || link->state == LINK_STATE_UNMANAGED)
return 0;
+ r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
+ if (r >= 0 && !streq(ifname, link->ifname)) {
+ log_info_link(link, "renamed to %s", ifname);
+
+ free(link->ifname);
+ link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
+ }
+
+ if (!link->original_mtu) {
+ r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu);
+ if (r >= 0)
+ log_debug_link(link, "saved original MTU: %"
+ PRIu16, link->original_mtu);
+ }
+
+ /* The kernel may broadcast NEWLINK messages without the MAC address
+ set, simply ignore them. */
+ r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
+ if (r >= 0) {
+ if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) {
+
+ memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
+
+ log_debug_link(link, "MAC address: "
+ "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+ mac.ether_addr_octet[0],
+ mac.ether_addr_octet[1],
+ mac.ether_addr_octet[2],
+ mac.ether_addr_octet[3],
+ mac.ether_addr_octet[4],
+ mac.ether_addr_octet[5]);
+
+ if (link->ipv4ll) {
+ r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in IPv4LL client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (link->dhcp_client) {
+ r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in DHCP client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+ }
+ }
+
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);
+}
+
+int link_save(Link *link) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *state;
+ int r;
+
+ assert(link);
+ assert(link->state_file);
+
+ state = link_state_to_string(link->state);
+ assert(state);
+
+ r = fopen_temporary(link->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "STATE=%s\n", state);
+
+ if (link->dhcp_lease) {
+ _cleanup_free_ char *lease_file = NULL;
+
+ r = asprintf(&lease_file, "/run/systemd/network/leases/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
+
+ r = dhcp_lease_save(link->dhcp_lease, lease_file);
+ if (r < 0)
+ goto finish;
+
+ fprintf(f, "DHCP_LEASE=%s\n", lease_file);
}
- return link_update_flags(link, flags);
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, link->state_file) < 0) {
+ r = -errno;
+ unlink(link->state_file);
+ unlink(temp_path);
+ }
+
+finish:
+ if (r < 0)
+ log_error("Failed to save link data %s: %s", link->state_file, strerror(-r));
+
+ return r;
}
+
+static const char* const link_state_table[_LINK_STATE_MAX] = {
+ [LINK_STATE_INITIALIZING] = "configuring",
+ [LINK_STATE_ENSLAVING] = "configuring",
+ [LINK_STATE_SETTING_ADDRESSES] = "configuring",
+ [LINK_STATE_SETTING_ROUTES] = "configuring",
+ [LINK_STATE_CONFIGURED] = "configured",
+ [LINK_STATE_UNMANAGED] = "unmanaged",
+ [LINK_STATE_FAILED] = "failed",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
~ianmdlvl / elogind.git / blobdiff