-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <unistd.h>
+#include <ftw.h>
#include <string.h>
+#include <unistd.h>
-#ifdef HAVE_KMOD
+#if HAVE_KMOD
#include <libkmod.h>
#endif
-#include "macro.h"
-#include "capability.h"
+#include "alloc-util.h"
#include "bus-util.h"
+#include "capability-util.h"
+#include "fileio.h"
#include "kmod-setup.h"
+#include "macro.h"
+#include "module-util.h"
+#include "string-util.h"
-#ifdef HAVE_KMOD
+#if HAVE_KMOD
static void systemd_kmod_log(
void *data,
int priority,
log_internalv(LOG_DEBUG, 0, file, line, fn, format, args);
REENABLE_WARNING;
}
+
+static int has_virtio_rng_nftw_cb(
+ const char *fpath,
+ const struct stat *sb,
+ int tflag,
+ struct FTW *ftwbuf) {
+
+ _cleanup_free_ char *alias = NULL;
+ int r;
+
+ if ((FTW_D == tflag) && (ftwbuf->level > 2))
+ return FTW_SKIP_SUBTREE;
+
+ if (FTW_F != tflag)
+ return FTW_CONTINUE;
+
+ if (!endswith(fpath, "/modalias"))
+ return FTW_CONTINUE;
+
+ r = read_one_line_file(fpath, &alias);
+ if (r < 0)
+ return FTW_SKIP_SIBLINGS;
+
+ if (startswith(alias, "pci:v00001AF4d00001005"))
+ return FTW_STOP;
+
+ if (startswith(alias, "pci:v00001AF4d00001044"))
+ return FTW_STOP;
+
+ return FTW_SKIP_SIBLINGS;
+}
+
+static bool has_virtio_rng(void) {
+ return (nftw("/sys/devices/pci0000:00", has_virtio_rng_nftw_cb, 64, FTW_MOUNT|FTW_PHYS|FTW_ACTIONRETVAL) == FTW_STOP);
+}
#endif
int kmod_setup(void) {
-#ifdef HAVE_KMOD
+#if HAVE_KMOD
static const struct {
const char *module;
const char *path;
- bool warn;
+ bool warn_if_unavailable:1;
+ bool warn_if_module:1;
bool (*condition_fn)(void);
} kmod_table[] = {
/* auto-loading on use doesn't work before udev is up */
- { "autofs4", "/sys/class/misc/autofs", true, NULL },
+ { "autofs4", "/sys/class/misc/autofs", true, false, NULL },
/* early configure of ::1 on the loopback device */
- { "ipv6", "/sys/module/ipv6", false, NULL },
+ { "ipv6", "/sys/module/ipv6", false, true, NULL },
/* this should never be a module */
- { "unix", "/proc/net/unix", true, NULL },
-
-#ifdef ENABLE_KDBUS
- /* IPC is needed before we bring up any other services */
- { "kdbus", "/sys/fs/kdbus", false, is_kdbus_wanted },
-#endif
+ { "unix", "/proc/net/unix", true, true, NULL },
-#ifdef HAVE_LIBIPTC
+#if HAVE_LIBIPTC
/* netfilter is needed by networkd, nspawn among others, and cannot be autoloaded */
- { "ip_tables", "/proc/net/ip_tables_names", false, NULL },
+ { "ip_tables", "/proc/net/ip_tables_names", false, false, NULL },
#endif
+ /* virtio_rng would be loaded by udev later, but real entropy might be needed very early */
+ { "virtio_rng", NULL, false, false, has_virtio_rng },
};
- struct kmod_ctx *ctx = NULL;
+ _cleanup_(kmod_unrefp) struct kmod_ctx *ctx = NULL;
unsigned int i;
int r;
return 0;
for (i = 0; i < ELEMENTSOF(kmod_table); i++) {
- struct kmod_module *mod;
+ _cleanup_(kmod_module_unrefp) struct kmod_module *mod = NULL;
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;
- if (kmod_table[i].warn)
+ if (kmod_table[i].warn_if_module)
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);
r = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
if (r == 0)
- log_info("Inserted module '%s'", kmod_module_get_name(mod));
+ log_debug("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 if (kmod_table[i].warn)
- log_error("Failed to insert module '%s'", kmod_module_get_name(mod));
+ else {
+ bool print_warning = kmod_table[i].warn_if_unavailable || (r < 0 && r != -ENOENT);
- kmod_module_unref(mod);
+ log_full_errno(print_warning ? LOG_WARNING : LOG_DEBUG, r,
+ "Failed to insert module '%s': %m", kmod_module_get_name(mod));
+ }
}
- if (ctx)
- kmod_unref(ctx);
-
#endif
return 0;
}