***/
#include <resolv.h>
+#include <linux/if.h>
+#include <libkmod.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_USER
+#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 set_fallback_dns(Manager *m, const char *string) {
+ char *word, *state;
+ size_t length;
+ int r;
+
+ assert(m);
+ assert(string);
+
+ FOREACH_WORD_QUOTED(word, length, string, state) {
+ _cleanup_address_free_ Address *address = NULL;
+ Address *tail;
+ _cleanup_free_ char *addrstr = NULL;
+
+ r = address_new_dynamic(&address);
+ if (r < 0)
+ return r;
+
+ addrstr = strndup(word, length);
+ if (!addrstr)
+ return -ENOMEM;
+
+ r = net_parse_inaddr(addrstr, &address->family, &address->in_addr);
+ if (r < 0) {
+ log_debug("Ignoring invalid DNS address '%s'", addrstr);
+ continue;
+ }
+
+ LIST_FIND_TAIL(addresses, m->fallback_dns, tail);
+ LIST_INSERT_AFTER(addresses, m->fallback_dns, tail, address);
+ address = NULL;
+ }
+
+ return 0;
+}
+
+int config_parse_dnsv(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ Manager *m = userdata;
+ Address *address;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(m);
+
+ while ((address = m->fallback_dns)) {
+ LIST_REMOVE(addresses, m->fallback_dns, address);
+ address_free(address);
+ }
+
+ set_fallback_dns(m, rvalue);
+
+ return 0;
+}
+
+static int manager_parse_config_file(Manager *m) {
+ static const char fn[] = "/etc/systemd/networkd.conf";
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(m);
+
+ f = fopen(fn, "re");
+ if (!f) {
+ if (errno == ENOENT)
+ return 0;
+
+ log_warning("Failed to open configuration file %s: %m", fn);
+ return -errno;
+ }
+
+ r = config_parse(NULL, fn, f, "Network\0", config_item_perf_lookup,
+ (void*) networkd_gperf_lookup, false, false, m);
+ if (r < 0)
+ log_warning("Failed to parse configuration file: %s", strerror(-r));
+
+ return r;
+}
+
int manager_new(Manager **ret) {
_cleanup_manager_free_ Manager *m = NULL;
int r;
if (!m)
return -ENOMEM;
+ m->state_file = strdup("/run/systemd/network/state");
+ if (!m->state_file)
+ return -ENOMEM;
+
+ r = set_fallback_dns(m, DNS_SERVERS);
+ if (r < 0)
+ return r;
+
+ r = manager_parse_config_file(m);
+ if (r < 0)
+ return r;
+
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;
if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
return r;
- m->udev = udev_new();
- if (!m->udev)
- 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->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
- if (!m->udev_monitor)
+ m->kmod_ctx = kmod_new(NULL, NULL);
+ if (!m->kmod_ctx)
return -ENOMEM;
m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
void manager_free(Manager *m) {
Network *network;
- Netdev *netdev;
+ NetDev *netdev;
Link *link;
+ Address *address;
+
+ if (!m)
+ return;
+ free(m->state_file);
+
+ kmod_unref(m->kmod_ctx);
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 ((network = m->networks))
- network_free(network);
+ while ((address = m->fallback_dns)) {
+ LIST_REMOVE(addresses, m->fallback_dns, address);
+ address_free(address);
+ }
while ((link = hashmap_first(m->links)))
- link_free(link);
+ link_unref(link);
hashmap_free(m->links);
+ while ((network = m->networks))
+ network_free(network);
+
while ((netdev = hashmap_first(m->netdevs)))
- netdev_free(netdev);
+ netdev_unref(netdev);
hashmap_free(m->netdevs);
sd_rtnl_unref(m->rtnl);
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;
-
- if (streq_ptr(udev_device_get_action(device), "remove")) {
- uint64_t ifindex;
+static int manager_udev_process_link(Manager *m, struct udev_device *device) {
+ Link *link = NULL;
+ int r, ifindex;
- log_debug("%s: link removed", udev_device_get_sysname(device));
+ assert(m);
+ assert(device);
- ifindex = udev_device_get_ifindex(device);
- link = hashmap_get(m->links, &ifindex);
- if (!link)
- return 0;
+ if (!streq_ptr(udev_device_get_action(device), "add"))
+ return 0;
- link_free(link);
- } else {
- r = link_add(m, device, &link);
- if (r < 0) {
- if (r == -EEXIST)
- log_debug("%s: link already exists, ignoring",
- link->ifname);
- else
- log_error("%s: could not handle link: %s",
- udev_device_get_sysname(device),
- strerror(-r));
- } else
- log_debug("%s: link (with ifindex %" PRIu64") added",
- link->ifname, link->ifindex);
+ ifindex = udev_device_get_ifindex(device);
+ if (ifindex <= 0) {
+ log_debug("ignoring udev ADD event for device with invalid ifindex");
+ return 0;
}
+ r = link_get(m, ifindex, &link);
+ if (r == -ENODEV)
+ return 0;
+ else if (r < 0)
+ return 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");
+ 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;
+
+ case RTM_DELLINK:
+ link_drop(link);
+ netdev_drop(netdev);
+
+ break;
+
+ default:
+ assert_not_reached("Received invalid RTNL message type.");
+ }
+
+ return 1;
+}
- r = udev_enumerate_add_match_subsystem(e, "net");
+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;
- const char *name;
- uint64_t ifindex_64;
- int r, ifindex;
-
- r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
- if (r < 0 || ifindex <= 0) {
- log_debug("received RTM_NEWLINK message without valid ifindex");
- return 0;
- }
-
- r = rtnl_message_link_get_ifname(message, &name);
- if (r < 0)
- log_debug("received RTM_NEWLINK message without valid IFLA_IFNAME");
- else {
- Netdev *netdev;
-
- r = netdev_get(m, name, &netdev);
- if (r >= 0) {
- r = netdev_set_ifindex(netdev, ifindex);
- if (r < 0)
- log_debug("could not set ifindex of netdev '%s' to %d: %s",
- name, ifindex, strerror(-r));
- }
- }
-
- ifindex_64 = ifindex;
- link = hashmap_get(m->links, &ifindex_64);
- if (!link) {
- log_debug("received RTM_NEWLINK message for untracked ifindex %d", ifindex);
- return 0;
- }
-
- /* only track the status of links we want to manage */
- if (link->network) {
- r = link_update(link, message);
- if (r < 0)
- return 0;
- } else
- log_debug("%s: received RTM_NEWLINK message for unmanaged link", link->ifname);
-
- return 1;
-}
-
int manager_rtnl_listen(Manager *m) {
int r;
if (r < 0)
return r;
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m);
+ if (r < 0)
+ return r;
+
+ 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;
}
assert(m);
- r = mkdir_safe_label("/run/systemd/network", 0755, 0, 0);
- if (r < 0)
- return r;
-
r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
if (r < 0)
return r;
"# static file or a different symlink.\n\n", f);
HASHMAP_FOREACH(link, m->links, i) {
- if (link->dhcp) {
+ if (link->dhcp_lease) {
struct in_addr *nameservers;
size_t nameservers_size;
if (link->network->dhcp_dns) {
- r = sd_dhcp_client_get_dns(link->dhcp, &nameservers, &nameservers_size);
+ r = sd_dhcp_lease_get_dns(link->dhcp_lease, &nameservers, &nameservers_size);
if (r >= 0) {
unsigned j;
}
if (link->network->dhcp_domainname && !domainname) {
- r = sd_dhcp_client_get_domainname(link->dhcp, &domainname);
+ r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
if (r >= 0)
fprintf(f, "domain %s\n", domainname);
}
}
}
- HASHMAP_FOREACH(link, m->links, i)
- if (link->network && link->network->dns)
- append_dns(f, &link->network->dns->in_addr.in,
- link->network->dns->family, &count);
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->network && link->network->dns) {
+ Address *address;
+
+ LIST_FOREACH(addresses, address, link->network->dns) {
+ append_dns(f, &address->in_addr.in,
+ address->family, &count);
+ }
+ }
+ }
+
+ if (!count) {
+ Address *address;
+
+ LIST_FOREACH(addresses, address, m->fallback_dns)
+ append_dns(f, &address->in_addr.in,
+ address->family, &count);
+ }
fflush(f);
return 0;
}
+
+int manager_save(Manager *m) {
+ Link *link;
+ Iterator i;
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ const char *oper_state = "unknown";
+ bool dormant = false, carrier = false;
+ int r;
+
+ assert(m);
+ assert(m->state_file);
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ if (link->flags & IFF_LOOPBACK)
+ continue;
+
+ if (link_has_carrier(link->flags, link->operstate))
+ carrier = true;
+ else if (link->operstate == IF_OPER_DORMANT)
+ dormant = true;
+ }
+
+ if (carrier)
+ oper_state = "carrier";
+ else if (dormant)
+ oper_state = "dormant";
+
+ r = fopen_temporary(m->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "OPER_STATE=%s\n", oper_state);
+
+ 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;
+}
~ianmdlvl / elogind.git / blobdiff