1 files changed, 72 insertions, 0 deletions
diff --git a/src/shared/module-util.c b/src/shared/module-util.c
new file mode 100644
index 0000000..587e636
--- /dev/null
+++ b/src/shared/module-util.c
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+
+#include "module-util.h"
+
+int module_load_and_warn(struct kmod_ctx *ctx, const char *module, bool verbose) {
+        const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
+        struct kmod_list *itr;
+        _cleanup_(kmod_module_unref_listp) struct kmod_list *modlist = NULL;
+        int r;
+
+        /* verbose==true means we should log at non-debug level if we
+         * fail to find or load the module. */
+
+        log_debug("Loading module: %s", module);
+
+        r = kmod_module_new_from_lookup(ctx, module, &modlist);
+        if (r < 0)
+                return log_full_errno(verbose ? LOG_ERR : LOG_DEBUG, r,
+                                      "Failed to look up module alias '%s': %m", module);
+
+        if (!modlist) {
+                log_full_errno(verbose ? LOG_ERR : LOG_DEBUG, r,
+                               "Failed to find module '%s'", module);
+                return -ENOENT;
+        }
+
+        kmod_list_foreach(itr, modlist) {
+                _cleanup_(kmod_module_unrefp) struct kmod_module *mod = NULL;
+                int state, err;
+
+                mod = kmod_module_get_module(itr);
+                state = kmod_module_get_initstate(mod);
+
+                switch (state) {
+                case KMOD_MODULE_BUILTIN:
+                        log_full(verbose ? LOG_INFO : LOG_DEBUG,
+                                 "Module '%s' is built in", kmod_module_get_name(mod));
+                        break;
+
+                case KMOD_MODULE_LIVE:
+                        log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
+                        break;
+
+                default:
+                        err = kmod_module_probe_insert_module(mod, probe_flags,
+                                                              NULL, NULL, NULL, NULL);
+                        if (err == 0)
+                                log_full(verbose ? LOG_INFO : LOG_DEBUG,
+                                         "Inserted module '%s'", kmod_module_get_name(mod));
+                        else if (err == KMOD_PROBE_APPLY_BLACKLIST)
+                                log_full(verbose ? LOG_INFO : LOG_DEBUG,
+                                         "Module '%s' is deny-listed", kmod_module_get_name(mod));
+                        else {
+                                assert(err < 0);
+
+                                log_full_errno(!verbose ? LOG_DEBUG :
+                                               err == -ENODEV ? LOG_NOTICE :
+                                               err == -ENOENT ? LOG_WARNING :
+                                                                LOG_ERR,
+                                               err,
+                                               "Failed to insert module '%s': %m",
+                                               kmod_module_get_name(mod));
+                                if (!IN_SET(err, -ENODEV, -ENOENT))
+                                        r = err;
+                        }
+                }
+        }
+
+        return r;
+}