src/udev/udev-builtin-net_setup_link.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "device-util.h"
   4 #include "alloc-util.h"
   5 #include "link-config.h"
   6 #include "log.h"
   7 #include "string-util.h"
   8 #include "udev-builtin.h"
   9
  10 static link_config_ctx *ctx = NULL;
  11
  12 static int builtin_net_setup_link(sd_device *dev, int argc, char **argv, bool test) {
  13         _cleanup_free_ char *driver = NULL;
  14         const char *name = NULL;
  15         link_config *link;
  16         int r;
  17
  18         if (argc > 1)
  19                 return log_device_error_errno(dev, SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments.");
  20
  21         r = link_get_driver(ctx, dev, &driver);
  22         if (r >= 0)
  23                 udev_builtin_add_property(dev, test, "ID_NET_DRIVER", driver);
  24
  25         r = link_config_get(ctx, dev, &link);
  26         if (r < 0) {
  27                 if (r == -ENOENT)
  28                         return log_device_debug_errno(dev, r, "No matching link configuration found.");
  29
  30                 return log_device_error_errno(dev, r, "Failed to get link config: %m");
  31         }
  32
  33         r = link_config_apply(ctx, link, dev, &name);
  34         if (r < 0)
  35                 log_device_warning_errno(dev, r, "Could not apply link config, ignoring: %m");
  36
  37         udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->filename);
  38
  39         if (name)
  40                 udev_builtin_add_property(dev, test, "ID_NET_NAME", name);
  41
  42         return 0;
  43 }
  44
  45 static int builtin_net_setup_link_init(void) {
  46         int r;
  47
  48         if (ctx)
  49                 return 0;
  50
  51         r = link_config_ctx_new(&ctx);
  52         if (r < 0)
  53                 return r;
  54
  55         r = link_config_load(ctx);
  56         if (r < 0)
  57                 return r;
  58
  59         log_debug("Created link configuration context.");
  60         return 0;
  61 }
  62
  63 static void builtin_net_setup_link_exit(void) {
  64         link_config_ctx_free(ctx);
  65         ctx = NULL;
  66         log_debug("Unloaded link configuration context.");
  67 }
  68
  69 static bool builtin_net_setup_link_validate(void) {
  70         log_debug("Check if link configuration needs reloading.");
  71         if (!ctx)
  72                 return false;
  73
  74         return link_config_should_reload(ctx);
  75 }
  76
  77 const UdevBuiltin udev_builtin_net_setup_link = {
  78         .name = "net_setup_link",
  79         .cmd = builtin_net_setup_link,
  80         .init = builtin_net_setup_link_init,
  81         .exit = builtin_net_setup_link_exit,
  82         .validate = builtin_net_setup_link_validate,
  83         .help = "Configure network link",
  84         .run_once = false,
  85 };