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-rw-r--r--src/systemd-modules-load/Makefile60
-rw-r--r--src/systemd-modules-load/modules-load.c283
2 files changed, 343 insertions, 0 deletions
diff --git a/src/systemd-modules-load/Makefile b/src/systemd-modules-load/Makefile
new file mode 100644
index 0000000000..1c51b134ad
--- /dev/null
+++ b/src/systemd-modules-load/Makefile
@@ -0,0 +1,60 @@
+# -*- Mode: makefile; indent-tabs-mode: t -*-
+#
+# This file is part of systemd.
+#
+# Copyright 2010-2012 Lennart Poettering
+# Copyright 2010-2012 Kay Sievers
+# Copyright 2013 Zbigniew Jędrzejewski-Szmek
+# Copyright 2013 David Strauss
+# Copyright 2016 Luke Shumaker
+#
+# 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 $(dir $(lastword $(MAKEFILE_LIST)))/../../config.mk
+include $(topsrcdir)/build-aux/Makefile.head.mk
+
+ifneq ($(HAVE_KMOD),)
+systemd_modules_load_SOURCES = \
+ src/modules-load/modules-load.c
+
+systemd_modules_load_CFLAGS = \
+ $(AM_CFLAGS) \
+ $(KMOD_CFLAGS)
+
+systemd_modules_load_LDADD = \
+ libshared.la \
+ $(KMOD_LIBS)
+
+rootlibexec_PROGRAMS += \
+ systemd-modules-load
+
+nodist_systemunit_DATA += \
+ units/systemd-modules-load.service
+
+SYSINIT_TARGET_WANTS += \
+ systemd-modules-load.service
+
+ifneq ($(ENABLE_TMPFILES),)
+nodist_systemunit_DATA += \
+ units/kmod-static-nodes.service
+
+SYSINIT_TARGET_WANTS += \
+ kmod-static-nodes.service
+endif # ENABLE_TMPFILES
+endif # HAVE_KMOD
+
+EXTRA_DIST += \
+ units/systemd-modules-load.service.in \
+ units/kmod-static-nodes.service.in
+
+include $(topsrcdir)/build-aux/Makefile.tail.mk
diff --git a/src/systemd-modules-load/modules-load.c b/src/systemd-modules-load/modules-load.c
new file mode 100644
index 0000000000..f75015d8c3
--- /dev/null
+++ b/src/systemd-modules-load/modules-load.c
@@ -0,0 +1,283 @@
+/***
+ 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 <errno.h>
+#include <getopt.h>
+#include <libkmod.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include "conf-files.h"
+#include "def.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "log.h"
+#include "proc-cmdline.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+static char **arg_proc_cmdline_modules = NULL;
+
+static const char conf_file_dirs[] = CONF_PATHS_NULSTR("modules-load.d");
+
+static void systemd_kmod_log(void *data, int priority, const char *file, int line,
+ const char *fn, const char *format, va_list args) {
+
+ DISABLE_WARNING_FORMAT_NONLITERAL;
+ log_internalv(priority, 0, file, line, fn, format, args);
+ REENABLE_WARNING;
+}
+
+static int add_modules(const char *p) {
+ _cleanup_strv_free_ char **k = NULL;
+
+ k = strv_split(p, ",");
+ if (!k)
+ return log_oom();
+
+ if (strv_extend_strv(&arg_proc_cmdline_modules, k, true) < 0)
+ return log_oom();
+
+ return 0;
+}
+
+static int parse_proc_cmdline_item(const char *key, const char *value) {
+ int r;
+
+ if (STR_IN_SET(key, "modules-load", "rd.modules-load") && value) {
+ r = add_modules(value);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int load_module(struct kmod_ctx *ctx, const char *m) {
+ const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
+ struct kmod_list *itr, *modlist = NULL;
+ int r = 0;
+
+ log_debug("load: %s", m);
+
+ r = kmod_module_new_from_lookup(ctx, m, &modlist);
+ if (r < 0)
+ return log_error_errno(r, "Failed to lookup alias '%s': %m", m);
+
+ if (!modlist) {
+ log_error("Failed to find module '%s'", m);
+ return -ENOENT;
+ }
+
+ kmod_list_foreach(itr, modlist) {
+ struct kmod_module *mod;
+ int state, err;
+
+ mod = kmod_module_get_module(itr);
+ state = kmod_module_get_initstate(mod);
+
+ switch (state) {
+ case KMOD_MODULE_BUILTIN:
+ log_info("Module '%s' is builtin", kmod_module_get_name(mod));
+ break;
+
+ case KMOD_MODULE_LIVE:
+ log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
+ break;
+
+ default:
+ err = kmod_module_probe_insert_module(mod, probe_flags,
+ 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_errno(err, "Failed to insert '%s': %m", kmod_module_get_name(mod));
+ r = err;
+ }
+ }
+
+ kmod_module_unref(mod);
+ }
+
+ kmod_module_unref_list(modlist);
+
+ return r;
+}
+
+static int apply_file(struct kmod_ctx *ctx, const char *path, bool ignore_enoent) {
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(ctx);
+ assert(path);
+
+ r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f);
+ if (r < 0) {
+ if (ignore_enoent && r == -ENOENT)
+ return 0;
+
+ return log_error_errno(r, "Failed to open %s, ignoring: %m", path);
+ }
+
+ log_debug("apply: %s", path);
+ for (;;) {
+ char line[LINE_MAX], *l;
+ int k;
+
+ if (!fgets(line, sizeof(line), f)) {
+ if (feof(f))
+ break;
+
+ return log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path);
+ }
+
+ l = strstrip(line);
+ if (!*l)
+ continue;
+ if (strchr(COMMENTS "\n", *l))
+ continue;
+
+ k = load_module(ctx, l);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+
+ return r;
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
+ "Loads statically configured kernel modules.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n",
+ program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ int r, k;
+ struct kmod_ctx *ctx;
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ r = parse_proc_cmdline(parse_proc_cmdline_item);
+ if (r < 0)
+ log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
+
+ ctx = kmod_new(NULL, NULL);
+ if (!ctx) {
+ log_error("Failed to allocate memory for kmod.");
+ goto finish;
+ }
+
+ kmod_load_resources(ctx);
+ kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
+
+ r = 0;
+
+ if (argc > optind) {
+ int i;
+
+ for (i = optind; i < argc; i++) {
+ k = apply_file(ctx, argv[i], false);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+
+ } else {
+ _cleanup_strv_free_ char **files = NULL;
+ char **fn, **i;
+
+ STRV_FOREACH(i, arg_proc_cmdline_modules) {
+ k = load_module(ctx, *i);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+
+ k = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
+ if (k < 0) {
+ log_error_errno(k, "Failed to enumerate modules-load.d files: %m");
+ if (r == 0)
+ r = k;
+ goto finish;
+ }
+
+ STRV_FOREACH(fn, files) {
+ k = apply_file(ctx, *fn, true);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+ }
+
+finish:
+ kmod_unref(ctx);
+ strv_free(arg_proc_cmdline_modules);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
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