src/shared/module-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4
   5 #include "module-util.h"
   6
   7 int module_load_and_warn(struct kmod_ctx *ctx, const char *module, bool verbose) {
   8         const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
   9         struct kmod_list *itr;
  10         _cleanup_(kmod_module_unref_listp) struct kmod_list *modlist = NULL;
  11         int r = 0;
  12
  13         /* verbose==true means we should log at non-debug level if we
  14          * fail to find or load the module. */
  15
  16         log_debug("Loading module: %s", module);
  17
  18         r = kmod_module_new_from_lookup(ctx, module, &modlist);
  19         if (r < 0)
  20                 return log_full_errno(verbose ? LOG_ERR : LOG_DEBUG, r,
  21                                       "Failed to lookup module alias '%s': %m", module);
  22
  23         if (!modlist) {
  24                 log_full_errno(verbose ? LOG_ERR : LOG_DEBUG, r,
  25                                "Failed to find module '%s'", module);
  26                 return -ENOENT;
  27         }
  28
  29         kmod_list_foreach(itr, modlist) {
  30                 _cleanup_(kmod_module_unrefp) struct kmod_module *mod = NULL;
  31                 int state, err;
  32
  33                 mod = kmod_module_get_module(itr);
  34                 state = kmod_module_get_initstate(mod);
  35
  36                 switch (state) {
  37                 case KMOD_MODULE_BUILTIN:
  38                         log_full(verbose ? LOG_INFO : LOG_DEBUG,
  39                                  "Module '%s' is builtin", kmod_module_get_name(mod));
  40                         break;
  41
  42                 case KMOD_MODULE_LIVE:
  43                         log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
  44                         break;
  45
  46                 default:
  47                         err = kmod_module_probe_insert_module(mod, probe_flags,
  48                                                               NULL, NULL, NULL, NULL);
  49                         if (err == 0)
  50                                 log_full(verbose ? LOG_INFO : LOG_DEBUG,
  51                                          "Inserted module '%s'", kmod_module_get_name(mod));
  52                         else if (err == KMOD_PROBE_APPLY_BLACKLIST)
  53                                 log_full(verbose ? LOG_INFO : LOG_DEBUG,
  54                                          "Module '%s' is blacklisted", kmod_module_get_name(mod));
  55                         else {
  56                                 assert(err < 0);
  57
  58                                 log_full_errno(!verbose ? LOG_DEBUG :
  59                                                err == -ENODEV ? LOG_NOTICE :
  60                                                err == -ENOENT ? LOG_WARNING :
  61                                                                 LOG_ERR,
  62                                                err,
  63                                                "Failed to insert module '%s': %m",
  64                                                kmod_module_get_name(mod));
  65                                 if (!IN_SET(err, -ENODEV, -ENOENT))
  66                                         r = err;
  67                         }
  68                 }
  69         }
  70
  71         return r;
  72 }