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-rw-r--r--src/core/kmod-setup.c58
1 files changed, 37 insertions, 21 deletions
diff --git a/src/core/kmod-setup.c b/src/core/kmod-setup.c
index e4885fb212..bc3460a698 100644
--- a/src/core/kmod-setup.c
+++ b/src/core/kmod-setup.c
@@ -47,35 +47,51 @@ static void systemd_kmod_log(
#pragma GCC diagnostic pop
-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"
+static bool kmod_check_cmdline(void) {
+ _cleanup_free_ char *line = NULL;
- /* 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"
+ if (proc_cmdline(&line) < 0)
+ return false;
- "unix\0" "/proc/net/unix\0";
+ return strstr(line, "kdbus") == 0;
+}
+int kmod_setup(void) {
+ 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/bus/kdbus", false, kmod_check_cmdline },
+ };
struct kmod_ctx *ctx = NULL;
- const char *name, *path;
+ unsigned int i;
int r;
- NULSTR_FOREACH_PAIR(name, path, kmod_table) {
+ for (i = 0; i < ELEMENTSOF(kmod_table); i++) {
struct kmod_module *mod;
- if (access(path, F_OK) >= 0)
+ if (kmod_table[i].condition_fn && kmod_table[i].condition_fn())
+ continue;
+
+ if (access(kmod_table[i].path, 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...",
- 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);
@@ -86,9 +102,9 @@ int kmod_setup(void) {
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;
}