src/udev/udev-builtin-net_setup_link.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2013 Tom Gundersen
   6 ***/
   7
   8 #include "alloc-util.h"
   9 #include "link-config.h"
  10 #include "log.h"
  11 #include "udev.h"
  12
  13 static link_config_ctx *ctx = NULL;
  14
  15 static int builtin_net_setup_link(struct udev_device *dev, int argc, char **argv, bool test) {
  16         _cleanup_free_ char *driver = NULL;
  17         const char *name = NULL;
  18         link_config *link;
  19         int r;
  20
  21         if (argc > 1) {
  22                 log_error("This program takes no arguments.");
  23                 return EXIT_FAILURE;
  24         }
  25
  26         r = link_get_driver(ctx, dev, &driver);
  27         if (r >= 0)
  28                 udev_builtin_add_property(dev, test, "ID_NET_DRIVER", driver);
  29
  30         r = link_config_get(ctx, dev, &link);
  31         if (r < 0) {
  32                 if (r == -ENOENT) {
  33                         log_debug("No matching link configuration found.");
  34                         return EXIT_SUCCESS;
  35                 } else {
  36                         log_error_errno(r, "Could not get link config: %m");
  37                         return EXIT_FAILURE;
  38                 }
  39         }
  40
  41         r = link_config_apply(ctx, link, dev, &name);
  42         if (r < 0)
  43                 log_warning_errno(r, "Could not apply link config to %s, ignoring: %m", udev_device_get_sysname(dev));
  44
  45         udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->filename);
  46
  47         if (name)
  48                 udev_builtin_add_property(dev, test, "ID_NET_NAME", name);
  49
  50         return EXIT_SUCCESS;
  51 }
  52
  53 static int builtin_net_setup_link_init(struct udev *udev) {
  54         int r;
  55
  56         if (ctx)
  57                 return 0;
  58
  59         r = link_config_ctx_new(&ctx);
  60         if (r < 0)
  61                 return r;
  62
  63         r = link_config_load(ctx);
  64         if (r < 0)
  65                 return r;
  66
  67         log_debug("Created link configuration context.");
  68         return 0;
  69 }
  70
  71 static void builtin_net_setup_link_exit(struct udev *udev) {
  72         link_config_ctx_free(ctx);
  73         ctx = NULL;
  74         log_debug("Unloaded link configuration context.");
  75 }
  76
  77 static bool builtin_net_setup_link_validate(struct udev *udev) {
  78         log_debug("Check if link configuration needs reloading.");
  79         if (!ctx)
  80                 return false;
  81
  82         return link_config_should_reload(ctx);
  83 }
  84
  85 const struct udev_builtin udev_builtin_net_setup_link = {
  86         .name = "net_setup_link",
  87         .cmd = builtin_net_setup_link,
  88         .init = builtin_net_setup_link_init,
  89         .exit = builtin_net_setup_link_exit,
  90         .validate = builtin_net_setup_link_validate,
  91         .help = "Configure network link",
  92         .run_once = false,
  93 };