along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <netinet/ether.h>
+#include <linux/if.h>
+
#include "sd-event.h"
#include "event-util.h"
+#include "sd-rtnl.h"
+#include "rtnl-util.h"
#include "sd-daemon.h"
#include "sd-network.h"
#include "network-util.h"
+#include "network-internal.h"
+#include "networkd-wait-online.h"
+#include "conf-parser.h"
+#include "strv.h"
#include "util.h"
-static bool all_configured(void) {
+static bool all_configured(Manager *m) {
_cleanup_free_ unsigned *indices = NULL;
+ char **ifname;
bool one_ready = false;
int r, n, i;
if (n <= 0)
return false;
+ STRV_FOREACH(ifname, m->expected_links) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL, *reply = NULL;
+ bool found = false;
+ int index;
+
+ r = sd_rtnl_message_new_link(m->rtnl, &message, RTM_GETLINK, 0);
+ if (r < 0) {
+ log_warning("colud not create GETLINK message: %s", strerror(-r));
+ return false;
+ }
+
+ r = sd_rtnl_message_append_string(message, IFLA_IFNAME, *ifname);
+ if (r < 0) {
+ log_warning("could not attach ifname to GETLINK message: %s", strerror(-r));
+ return false;
+ }
+
+ r = sd_rtnl_call(m->rtnl, message, 0, &reply);
+ if (r < 0) {
+ if (r != -ENODEV)
+ log_warning("could not get link info for %s: %s", *ifname,
+ strerror(-r));
+
+ /* link does not yet exist */
+ return false;
+ }
+
+ r = sd_rtnl_message_link_get_ifindex(reply, &index);
+ if (r < 0) {
+ log_warning("could not get ifindex: %s", strerror(-r));
+ return false;
+ }
+
+ if (index <= 0) {
+ log_warning("invalid ifindex %d for %s", index, *ifname);
+ return false;
+ }
+
+ for (i = 0; i < n; i++) {
+ if (indices[i] == (unsigned) index) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ /* link exists, but networkd is not yet aware of it */
+ return false;
+ }
+
for (i = 0; i < n; i++) {
_cleanup_free_ char *state = NULL;
r = sd_network_get_link_state(indices[i], &state);
- if (r == -EUNATCH)
+ if (r == -EUNATCH) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL, *reply = NULL;
+ unsigned flags;
+ uint8_t operstate;
+
+ r = sd_rtnl_message_new_link(m->rtnl, &message, RTM_GETLINK, indices[i]);
+ if (r < 0) {
+ log_warning("could not create GETLINK message: %s", strerror(-r));
+ return false;
+ }
+
+ r = sd_rtnl_call(m->rtnl, message, 0, &reply);
+ if (r < 0) {
+ log_debug("could not get link %u: %s", indices[i], strerror(-r));
+ continue;
+ }
+
+ r = sd_rtnl_message_link_get_flags(reply, &flags);
+ if (r < 0) {
+ log_warning("could not get link flags: %s", strerror(-r));
+ return false;
+ }
+
+ r = sd_rtnl_message_read_u8(reply, IFLA_OPERSTATE, &operstate);
+ if (r < 0) {
+ log_debug("could not get link operational state: %s", strerror(-r));
+ operstate = IF_OPER_UNKNOWN;
+ }
+
+ if (!(flags & IFF_LOOPBACK) &&
+ link_has_carrier(flags, operstate)) {
+ /* this link is not managed by us,
+ but something else may have
+ made it ready, so don't block */
+ one_ready = true;
+ }
+
continue;
- if (r < 0 || !streq(state, "configured"))
+ } else if (r < 0 || !streq(state, "configured"))
return false;
+ /* we wait for at least one link to appear */
one_ready = true;
}
return one_ready;
}
-static int event_handler(sd_event_source *s, int fd, uint32_t revents,
+static int monitor_event_handler(sd_event_source *s, int fd, uint32_t revents,
void *userdata) {
- sd_event *event = userdata;
+ Manager *m = userdata;
+
+ assert(m);
+ assert(m->event);
+
+ if (all_configured(m))
+ sd_event_exit(m->event, 0);
+
+ return 1;
+}
- assert(event);
+static int newlink_event_handler(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
+ Manager *m = userdata;
- if (all_configured())
- sd_event_exit(event, 0);
+ assert(m);
+ assert(m->event);
+
+ if (all_configured(m))
+ sd_event_exit(m->event, 0);
return 1;
}
+static int parse_config_file(Manager *m) {
+ static const char fn[] = "/etc/systemd/networkd-wait-online.conf";
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ 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, "WaitOnline\0", config_item_perf_lookup,
+ (void*) wait_online_gperf_lookup, false, false, m);
+ if (r < 0)
+ log_warning("Failed to parse configuration file: %s", strerror(-r));
+
+ return r;
+}
+
+void manager_free(Manager *m) {
+ if (!m)
+ return;
+
+ sd_event_unref(m->event);
+ sd_rtnl_unref(m->rtnl);
+ strv_free(m->expected_links);
+
+ free(m);
+}
+
int main(int argc, char *argv[]) {
- _cleanup_event_unref_ sd_event *event = NULL;
+ _cleanup_manager_free_ Manager *m = NULL;
_cleanup_event_source_unref_ sd_event_source *event_source = NULL;
_cleanup_network_monitor_unref_ sd_network_monitor *monitor = NULL;
int r, fd, events;
goto out;
}
+ m = new0(Manager, 1);
+ if (!m)
+ return log_oom();
+
+ r = parse_config_file(m);
+ if (r < 0)
+ goto out;
+
r = sd_network_monitor_new(NULL, &monitor);
if (r < 0) {
log_error("Could not create monitor: %s", strerror(-r));
goto out;
}
- r = sd_event_new(&event);
+ r = sd_event_new(&m->event);
if (r < 0) {
log_error("Could not create event: %s", strerror(-r));
goto out;
goto out;
}
- r = sd_event_add_io(event, &event_source, fd, events, &event_handler,
- event);
+ r = sd_event_add_io(m->event, &event_source, fd, events, &monitor_event_handler,
+ m);
if (r < 0) {
log_error("Could not add io event source: %s", strerror(-r));
goto out;
}
- if (all_configured()) {
+ r = sd_rtnl_open(&m->rtnl, RTMGRP_LINK);
+ if (r < 0) {
+ log_error("Could not create rtnl: %s", strerror(-r));
+ goto out;
+ }
+
+ r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
+ if (r < 0) {
+ log_error("Could not attach event to rtnl: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, newlink_event_handler, m);
+ if (r < 0)
+ return r;
+
+ if (all_configured(m)) {
r = 0;
goto out;
}
"READY=1\n"
"STATUS=Waiting for network connections...");
- r = sd_event_loop(event);
+ r = sd_event_loop(m->event);
if (r < 0) {
log_error("Event loop failed: %s", strerror(-r));
goto out;
~ianmdlvl / elogind.git / blobdiff