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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "alloc-util.h"
#include "device-private.h"
#include "device-util.h"
#include "errno-util.h"
#include "link-config.h"
#include "log.h"
#include "string-util.h"
#include "strv.h"
#include "udev-builtin.h"
static LinkConfigContext *ctx = NULL;
static int builtin_net_setup_link(UdevEvent *event, int argc, char **argv) {
sd_device *dev = ASSERT_PTR(ASSERT_PTR(event)->dev);
_cleanup_(link_freep) Link *link = NULL;
int r;
if (argc > 1)
return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
sd_device_action_t action;
r = sd_device_get_action(dev, &action);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to get action: %m");
if (!IN_SET(action, SD_DEVICE_ADD, SD_DEVICE_BIND, SD_DEVICE_MOVE)) {
log_device_debug(dev, "Not applying .link settings on '%s' uevent.",
device_action_to_string(action));
/* Import previously assigned .link file name. */
(void) udev_builtin_import_property(dev, event->dev_db_clone, event->event_mode, "ID_NET_LINK_FILE");
(void) udev_builtin_import_property(dev, event->dev_db_clone, event->event_mode, "ID_NET_LINK_FILE_DROPINS");
/* Set ID_NET_NAME= with the current interface name. */
const char *value;
if (sd_device_get_sysname(dev, &value) >= 0)
(void) udev_builtin_add_property(dev, event->event_mode, "ID_NET_NAME", value);
return 0;
}
r = link_new(ctx, &event->rtnl, dev, event->dev_db_clone, &link);
if (r == -ENODEV) {
log_device_debug_errno(dev, r, "Link vanished while getting information, ignoring.");
return 0;
}
if (r < 0)
return log_device_warning_errno(dev, r, "Failed to get link information: %m");
r = link_get_config(ctx, link);
if (r < 0) {
if (r == -ENOENT) {
log_device_debug_errno(dev, r, "No matching link configuration found, ignoring device.");
return 0;
}
return log_device_error_errno(dev, r, "Failed to get link config: %m");
}
r = link_apply_config(ctx, &event->rtnl, link, event->event_mode);
if (r == -ENODEV)
log_device_debug_errno(dev, r, "Link vanished while applying configuration, ignoring.");
else if (r < 0)
log_device_warning_errno(dev, r, "Could not apply link configuration, ignoring: %m");
event->altnames = TAKE_PTR(link->altnames);
return 0;
}
static int builtin_net_setup_link_init(void) {
int r;
if (ctx)
return 0;
r = link_config_ctx_new(&ctx);
if (r < 0)
return r;
r = link_config_load(ctx);
if (r < 0)
return r;
log_debug("Created link configuration context.");
return 0;
}
static void builtin_net_setup_link_exit(void) {
ctx = link_config_ctx_free(ctx);
log_debug("Unloaded link configuration context.");
}
static bool builtin_net_setup_link_should_reload(void) {
if (!ctx)
return false;
if (link_config_should_reload(ctx)) {
log_debug("Link configuration context needs reloading.");
return true;
}
return false;
}
const UdevBuiltin udev_builtin_net_setup_link = {
.name = "net_setup_link",
.cmd = builtin_net_setup_link,
.init = builtin_net_setup_link_init,
.exit = builtin_net_setup_link_exit,
.should_reload = builtin_net_setup_link_should_reload,
.help = "Configure network link",
.run_once = false,
};
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