src/udev/udev-builtin-net_setup_link.c

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