along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <sys/socket.h>
+#include <linux/if.h>
+
+#include "conf-parser.h"
#include "path-util.h"
#include "networkd.h"
+#include "network-internal.h"
#include "libudev-private.h"
#include "udev-util.h"
+#include "rtnl-util.h"
+#include "mkdir.h"
+#include "virt.h"
+
+#include "sd-rtnl.h"
+
+const char* const network_dirs[] = {
+ "/etc/systemd/network",
+ "/run/systemd/network",
+ "/usr/lib/systemd/network",
+#ifdef HAVE_SPLIT_USR
+ "/lib/systemd/network",
+#endif
+ NULL};
+
+static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
+ Manager *m = userdata;
+
+ assert(m);
+
+ log_received_signal(LOG_INFO, si);
+
+ sd_event_exit(m->event, 0);
+ return 0;
+}
+
+static int setup_signals(Manager *m) {
+ sigset_t mask;
+ int r;
+
+ assert(m);
+
+ assert_se(sigemptyset(&mask) == 0);
+ sigset_add_many(&mask, SIGINT, SIGTERM, -1);
+ assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
+
+ r = sd_event_add_signal(m->event, &m->sigterm_event_source, SIGTERM, dispatch_sigterm, m);
+ if (r < 0)
+ return r;
+
+ r = sd_event_add_signal(m->event, &m->sigint_event_source, SIGINT, dispatch_sigterm, m);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int setup_default_address_pool(Manager *m) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+
+ /* Add in the well-known private address ranges. */
+
+ r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
+ if (r < 0)
+ return r;
+
+ r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
int manager_new(Manager **ret) {
_cleanup_manager_free_ Manager *m = NULL;
if (!m)
return -ENOMEM;
+ m->state_file = strdup("/run/systemd/netif/state");
+ if (!m->state_file)
+ return -ENOMEM;
+
r = sd_event_default(&m->event);
if (r < 0)
return r;
sd_event_set_watchdog(m->event, true);
- r = sd_rtnl_open(RTMGRP_LINK | RTMGRP_IPV4_IFADDR, &m->rtnl);
+ r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR,
+ RTNLGRP_IPV6_IFADDR);
if (r < 0)
return r;
- m->udev = udev_new();
- if (!m->udev)
- return -ENOMEM;
+ r = sd_bus_default_system(&m->bus);
+ if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
+ return r;
- m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
- if (!m->udev_monitor)
- return -ENOMEM;
+ r = setup_signals(m);
+ if (r < 0)
+ return r;
+
+ /* udev does not initialize devices inside containers,
+ * so we rely on them being already initialized before
+ * entering the container */
+ if (detect_container(NULL) <= 0) {
+ m->udev = udev_new();
+ if (!m->udev)
+ return -ENOMEM;
+
+ m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+ if (!m->udev_monitor)
+ return -ENOMEM;
+ }
m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
if (!m->links)
return -ENOMEM;
- m->bridges = hashmap_new(string_hash_func, string_compare_func);
- if (!m->bridges)
+ m->netdevs = hashmap_new(string_hash_func, string_compare_func);
+ if (!m->netdevs)
return -ENOMEM;
LIST_HEAD_INIT(m->networks);
- m->network_dirs = strv_new("/etc/systemd/network/",
- "/run/systemd/network/",
- "/usr/lib/systemd/network",
-#ifdef HAVE_SPLIT_USER
- "/lib/systemd/network",
-#endif
- NULL);
- if (!m->network_dirs)
- return -ENOMEM;
-
- if (!path_strv_canonicalize_uniq(m->network_dirs))
- return -ENOMEM;
+ r = setup_default_address_pool(m);
+ if (r < 0)
+ return r;
*ret = m;
m = NULL;
void manager_free(Manager *m) {
Network *network;
- Bridge *bridge;
+ NetDev *netdev;
Link *link;
+ AddressPool *pool;
+
+ if (!m)
+ return;
+
+ free(m->state_file);
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
+ sd_bus_unref(m->bus);
sd_event_source_unref(m->udev_event_source);
+ sd_event_source_unref(m->sigterm_event_source);
+ sd_event_source_unref(m->sigint_event_source);
sd_event_unref(m->event);
+ while ((link = hashmap_first(m->links)))
+ link_unref(link);
+ hashmap_free(m->links);
+
while ((network = m->networks))
network_free(network);
- while ((link = hashmap_first(m->links)))
- link_free(link);
- hashmap_free(m->links);
+ while ((netdev = hashmap_first(m->netdevs)))
+ netdev_unref(netdev);
+ hashmap_free(m->netdevs);
- while ((bridge = hashmap_first(m->bridges)))
- bridge_free(bridge);
- hashmap_free(m->bridges);
+ while ((pool = m->address_pools))
+ address_pool_free(pool);
- strv_free(m->network_dirs);
sd_rtnl_unref(m->rtnl);
free(m);
int r;
/* update timestamp */
- paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, true);
+ paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true);
- r = bridge_load(m);
+ r = netdev_load(m);
if (r < 0)
return r;
}
bool manager_should_reload(Manager *m) {
- return paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, false);
+ return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false);
}
-static int manager_process_link(Manager *m, struct udev_device *device) {
- Link *link;
- int r;
+static int manager_udev_process_link(Manager *m, struct udev_device *device) {
+ Link *link = NULL;
+ int r, ifindex;
- if (streq_ptr(udev_device_get_action(device), "remove")) {
- uint64_t ifindex;
+ assert(m);
+ assert(device);
- log_debug("Link removed: %s", udev_device_get_sysname(device));
+ if (!streq_ptr(udev_device_get_action(device), "add"))
+ return 0;
- ifindex = udev_device_get_ifindex(device);
- link = hashmap_get(m->links, &ifindex);
- if (!link)
- return 0;
+ ifindex = udev_device_get_ifindex(device);
+ if (ifindex <= 0) {
+ log_debug("ignoring udev ADD event for device with invalid ifindex");
+ return 0;
+ }
- link_free(link);
- } else {
- log_debug("New link: %s", udev_device_get_sysname(device));
+ r = link_get(m, ifindex, &link);
+ if (r == -ENODEV)
+ return 0;
+ else if (r < 0)
+ return r;
- r = link_add(m, device);
- if (r < 0) {
- log_error("Could not handle link %s: %s",
- udev_device_get_sysname(device),
- strerror(-r));
- }
- }
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
return 0;
}
-int manager_udev_enumerate_links(Manager *m) {
- _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
- struct udev_list_entry *item = NULL, *first = NULL;
- int r;
+static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
+ Manager *m = userdata;
+ Link *link = NULL;
+ NetDev *netdev = NULL;
+ uint16_t type;
+ char *name;
+ int r, ifindex;
+ assert(rtnl);
+ assert(message);
assert(m);
- e = udev_enumerate_new(m->udev);
- if (!e)
- return -ENOMEM;
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0) {
+ log_warning("rtnl: could not get message type");
+ return 0;
+ }
+
+ r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ if (r < 0 || ifindex <= 0) {
+ log_warning("rtnl: received link message without valid ifindex");
+ return 0;
+ } else
+ link_get(m, ifindex, &link);
+
+ r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
+ if (r < 0 || !name) {
+ log_warning("rtnl: received link message without valid ifname");
+ return 0;
+ } else
+ netdev_get(m, name, &netdev);
+
+ switch (type) {
+ case RTM_NEWLINK:
+ if (!link) {
+ /* link is new, so add it */
+ r = link_add(m, message, &link);
+ if (r < 0) {
+ log_debug("could not add new link: %s",
+ strerror(-r));
+ return 0;
+ }
+ }
+
+ if (netdev) {
+ /* netdev exists, so make sure the ifindex matches */
+ r = netdev_set_ifindex(netdev, message);
+ if (r < 0) {
+ log_debug("could not set ifindex on netdev");
+ return 0;
+ }
+ }
+
+ r = link_update(link, message);
+ if (r < 0)
+ return 0;
+
+ break;
- r = udev_enumerate_add_match_subsystem(e, "net");
+ case RTM_DELLINK:
+ link_drop(link);
+ netdev_drop(netdev);
+
+ break;
+
+ default:
+ assert_not_reached("Received invalid RTNL message type.");
+ }
+
+ return 1;
+}
+
+int manager_rtnl_enumerate_links(Manager *m) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
+ sd_rtnl_message *link;
+ int r, k;
+
+ assert(m);
+ assert(m->rtnl);
+
+ r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
if (r < 0)
return r;
- r = udev_enumerate_add_match_is_initialized(e);
+ r = sd_rtnl_message_request_dump(req, true);
if (r < 0)
return r;
- r = udev_enumerate_scan_devices(e);
+ r = sd_rtnl_call(m->rtnl, req, 0, &reply);
if (r < 0)
return r;
- first = udev_enumerate_get_list_entry(e);
- udev_list_entry_foreach(item, first) {
- _cleanup_udev_device_unref_ struct udev_device *d = NULL;
- int k;
+ for (link = reply; link; link = sd_rtnl_message_next(link)) {
+ uint16_t type;
- d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
- if (!d)
- return -ENOMEM;
+ k = sd_rtnl_message_get_type(link, &type);
+ if (k < 0)
+ return k;
+
+ if (type != RTM_NEWLINK)
+ continue;
- k = manager_process_link(m, d);
+ k = manager_rtnl_process_link(m->rtnl, link, m);
if (k < 0)
r = k;
}
if (!device)
return -ENOMEM;
- manager_process_link(m, device);
+ manager_udev_process_link(m, device);
return 0;
}
int manager_udev_listen(Manager *m) {
int r;
+ if (detect_container(NULL) > 0)
+ return 0;
+
+ assert(m->udev_monitor);
+
r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
if (r < 0) {
log_error("Could not add udev monitor filter: %s", strerror(-r));
}
r = sd_event_add_io(m->event,
+ &m->udev_event_source,
udev_monitor_get_fd(m->udev_monitor),
EPOLLIN, manager_dispatch_link_udev,
- m, &m->udev_event_source);
+ m);
if (r < 0)
return r;
return 0;
}
-static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
- Manager *m = userdata;
- Link *link;
- int r, ifindex;
+int manager_rtnl_listen(Manager *m) {
+ int r;
- r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ assert(m);
+
+ r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
if (r < 0)
- return 0;
+ return r;
- link = hashmap_get(m->links, &ifindex);
- if (!link)
- return 0;
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
+ if (r < 0)
+ return r;
- r = link_update(link, message);
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
if (r < 0)
- return 0;
+ return r;
- return 1;
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, &link_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, &link_rtnl_process_address, m);
+ if (r < 0)
+ return r;
+
+ return 0;
}
-int manager_rtnl_listen(Manager *m) {
+int manager_bus_listen(Manager *m) {
int r;
- r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
+ assert(m->event);
+
+ if (!m->bus) /* TODO: drop when we can rely on kdbus */
+ return 0;
+
+ r = sd_bus_attach_event(m->bus, m->event, 0);
if (r < 0)
return r;
- r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);
+ return 0;
+}
+
+int manager_save(Manager *m) {
+ Link *link;
+ Iterator i;
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ LinkOperationalState operstate = LINK_OPERSTATE_UNKNOWN;
+ const char *operstate_str;
+ int r;
+
+ assert(m);
+ assert(m->state_file);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->flags & IFF_LOOPBACK)
+ continue;
+
+ if (link->operstate > operstate)
+ operstate = link->operstate;
+ }
+
+ operstate_str = link_operstate_to_string(operstate);
+ assert(operstate_str);
+
+ r = fopen_temporary(m->state_file, &f, &temp_path);
if (r < 0)
- return r;
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "OPER_STATE=%s\n", operstate_str);
+
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, m->state_file) < 0) {
+ r = -errno;
+ unlink(m->state_file);
+ unlink(temp_path);
+ }
+
+finish:
+ if (r < 0)
+ log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
+
+ return r;
+}
+
+int manager_address_pool_acquire(Manager *m, unsigned family, unsigned prefixlen, union in_addr_union *found) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+ assert(prefixlen > 0);
+ assert(found);
+
+ LIST_FOREACH(address_pools, p, m->address_pools) {
+ if (p->family != family)
+ continue;
+
+ r = address_pool_acquire(p, prefixlen, found);
+ if (r != 0)
+ return r;
+ }
return 0;
}
~ianmdlvl / elogind.git / blobdiff