+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- 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 <ftw.h>
#include <string.h>
#include <unistd.h>
-#ifdef HAVE_KMOD
-#include <libkmod.h>
-#endif
-
+#include "alloc-util.h"
#include "bus-util.h"
#include "capability-util.h"
+#include "fileio.h"
#include "kmod-setup.h"
#include "macro.h"
+#include "string-util.h"
+
+#if HAVE_KMOD
+#include <libkmod.h>
+#include "module-util.h"
-#ifdef 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;
/* this should never be a module */
{ "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, 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;
log_full_errno(print_warning ? LOG_WARNING : LOG_DEBUG, r,
"Failed to insert module '%s': %m", kmod_module_get_name(mod));
}
-
- kmod_module_unref(mod);
}
- if (ctx)
- kmod_unref(ctx);
-
#endif
return 0;
}