1 files changed, 104 insertions, 0 deletions
diff --git a/src/core/kmod-setup.c b/src/core/kmod-setup.c
new file mode 100644
index 0000000000..20ab232374
--- /dev/null
+++ b/src/core/kmod-setup.c
@@ -0,0 +1,104 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/wait.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <libkmod.h>
+
+#include "macro.h"
+#include "execute.h"
+
+#include "kmod-setup.h"
+
+typedef struct Kmodule {
+        const char *name;
+        const char *directory;
+        bool (*condition_fn)(void);
+} KModule;
+
+static const KModule kmod_table[] = {
+        { "autofs4",  "/sys/class/misc/autofs",    NULL } ,
+        { "ipv6",     "/sys/module/ipv6",          NULL },
+        { "unix",     "/proc/net/unix",            NULL } ,
+};
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+static void systemd_kmod_log(void *data, int priority, const char *file, int line,
+                             const char *fn, const char *format, va_list args)
+{
+        /* library logging is enabled at debug only */
+        log_metav(LOG_DEBUG, file, line, fn, format, args);
+}
+#pragma GCC diagnostic pop
+
+int kmod_setup(void) {
+        unsigned i;
+        struct kmod_ctx *ctx = NULL;
+        struct kmod_module *mod;
+        int err;
+
+        for (i = 0; i < ELEMENTSOF(kmod_table); i += 2) {
+                if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn())
+                        continue;
+
+                if (access(kmod_table[i].directory, F_OK) >= 0)
+                        continue;
+
+                log_debug("Your kernel apparently lacks built-in %s support. Might be a good idea to compile it in. "
+                          "We'll now try to work around this by loading the module...",
+                          kmod_table[i].name);
+
+                if (!ctx) {
+                        ctx = kmod_new(NULL, NULL);
+                        if (!ctx) {
+                                log_error("Failed to allocate memory for kmod");
+                                return -ENOMEM;
+                        }
+
+                        kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
+                        kmod_load_resources(ctx);
+                }
+
+                err = kmod_module_new_from_name(ctx, kmod_table[i].name, &mod);
+                if (err < 0) {
+                        log_error("Failed to lookup module '%s'", kmod_table[i].name);
+                        continue;
+                }
+
+                err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
+                if (err == 0)
+                        log_info("Inserted module '%s'", kmod_module_get_name(mod));
+                else if (err == KMOD_PROBE_APPLY_BLACKLIST)
+                        log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
+                else
+                        log_error("Failed to insert module '%s'", kmod_module_get_name(mod));
+
+                kmod_module_unref(mod);
+        }
+
+        if (ctx)
+                kmod_unref(ctx);
+
+        return 0;
+}