#include <unistd.h>
#include <string.h>
#include <errno.h>
+
+#ifdef HAVE_KMOD
#include <libkmod.h>
+#endif
#include "macro.h"
#include "execute.h"
-
+#include "capability.h"
#include "kmod-setup.h"
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wformat-nonliteral"
-
+#ifdef HAVE_KMOD
static void systemd_kmod_log(
void *data,
int priority,
va_list args) {
/* library logging is enabled at debug only */
- log_metav(LOG_DEBUG, file, line, fn, format, args);
+ DISABLE_WARNING_FORMAT_NONLITERAL;
+ log_internalv(LOG_DEBUG, 0, file, line, fn, format, args);
+ REENABLE_WARNING;
}
-#pragma GCC diagnostic pop
+static bool cmdline_check_kdbus(void) {
+ return get_proc_cmdline_key("kdbus", NULL) > 0;
+}
+#endif
int kmod_setup(void) {
-
- static const char kmod_table[] =
- /* This one we need to load explicitly, since
- * auto-loading on use doesn't work before udev
- * created the ghost device nodes, and we need it
- * earlier than that. */
- "autofs4\0" "/sys/class/misc/autofs\0"
-
- /* This one we need to load explicitly, since
- * auto-loading of IPv6 is not done when we try to
- * configure ::1 on the loopback device. */
- "ipv6\0" "/sys/module/ipv6\0"
-
- "unix\0" "/proc/net/unix\0";
-
+#ifdef HAVE_KMOD
+
+ static const struct {
+ const char *module;
+ const char *path;
+ bool warn;
+ bool (*condition_fn)(void);
+ } kmod_table[] = {
+ /* auto-loading on use doesn't work before udev is up */
+ { "autofs4", "/sys/class/misc/autofs", true, NULL },
+
+ /* early configure of ::1 on the loopback device */
+ { "ipv6", "/sys/module/ipv6", true, NULL },
+
+ /* this should never be a module */
+ { "unix", "/proc/net/unix", true, NULL },
+
+ /* IPC is needed before we bring up any other services */
+ { "kdbus", "/sys/fs/kdbus", false, cmdline_check_kdbus },
+ };
struct kmod_ctx *ctx = NULL;
- const char *name, *path;
+ unsigned int i;
int r;
- NULSTR_FOREACH_PAIR(name, path, kmod_table) {
+ if (have_effective_cap(CAP_SYS_MODULE) == 0)
+ return 0;
+
+ for (i = 0; i < ELEMENTSOF(kmod_table); i++) {
struct kmod_module *mod;
- if (access(path, F_OK) >= 0)
+ if (kmod_table[i].path && access(kmod_table[i].path, F_OK) >= 0)
+ continue;
+
+ if (kmod_table[i].condition_fn && !kmod_table[i].condition_fn())
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...",
- name);
+ if (kmod_table[i].warn)
+ 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].module);
if (!ctx) {
ctx = kmod_new(NULL, NULL);
kmod_load_resources(ctx);
}
- r = kmod_module_new_from_name(ctx, name, &mod);
+ r = kmod_module_new_from_name(ctx, kmod_table[i].module, &mod);
if (r < 0) {
- log_error("Failed to lookup module '%s'", name);
+ log_error("Failed to lookup module '%s'", kmod_table[i].module);
continue;
}
log_info("Inserted module '%s'", kmod_module_get_name(mod));
else if (r == KMOD_PROBE_APPLY_BLACKLIST)
log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
- else
+ else if (kmod_table[i].warn)
log_error("Failed to insert module '%s'", kmod_module_get_name(mod));
kmod_module_unref(mod);
if (ctx)
kmod_unref(ctx);
+#endif
return 0;
}