From 5e1f646c67c954fe7d55a747e3ffdd07e20cb46a Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Thu, 15 Sep 2016 01:52:25 -0400
Subject: ./tools/notsd-move

---
 src/grp-system/libcore/kmod-setup.c | 129 ++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 src/grp-system/libcore/kmod-setup.c

(limited to 'src/grp-system/libcore/kmod-setup.c')

diff --git a/src/grp-system/libcore/kmod-setup.c b/src/grp-system/libcore/kmod-setup.c
new file mode 100644
index 0000000000..c91c280e7d
--- /dev/null
+++ b/src/grp-system/libcore/kmod-setup.c
@@ -0,0 +1,129 @@
+/***
+  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 <string.h>
+#include <unistd.h>
+
+#ifdef HAVE_KMOD
+#include <libkmod.h>
+#endif
+
+#include "basic/capability-util.h"
+#include "basic/macro.h"
+#include "shared/bus-util.h"
+
+#include "kmod-setup.h"
+
+#ifdef HAVE_KMOD
+static void systemd_kmod_log(
+                void *data,
+                int priority,
+                const char *file, int line,
+                const char *fn,
+                const char *format,
+                va_list args) {
+
+        /* library logging is enabled at debug only */
+        DISABLE_WARNING_FORMAT_NONLITERAL;
+        log_internalv(LOG_DEBUG, 0, file, line, fn, format, args);
+        REENABLE_WARNING;
+}
+#endif
+
+int kmod_setup(void) {
+#ifdef HAVE_KMOD
+
+        static const struct {
+                const char *module;
+                const char *path;
+                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,   false,   NULL      },
+
+                /* early configure of ::1 on the loopback device */
+                { "ipv6",      "/sys/module/ipv6",          false,  true,    NULL      },
+
+                /* this should never be a module */
+                { "unix",      "/proc/net/unix",            true,   true,    NULL      },
+
+#ifdef 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
+        };
+        struct kmod_ctx *ctx = NULL;
+        unsigned int i;
+        int r;
+
+        if (have_effective_cap(CAP_SYS_MODULE) == 0)
+                return 0;
+
+        for (i = 0; i < ELEMENTSOF(kmod_table); i++) {
+                struct kmod_module *mod;
+
+                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_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);
+
+                if (!ctx) {
+                        ctx = kmod_new(NULL, NULL);
+                        if (!ctx)
+                                return log_oom();
+
+                        kmod_set_log_fn(ctx, systemd_kmod_log, NULL);
+                        kmod_load_resources(ctx);
+                }
+
+                r = kmod_module_new_from_name(ctx, kmod_table[i].module, &mod);
+                if (r < 0) {
+                        log_error("Failed to lookup module '%s'", kmod_table[i].module);
+                        continue;
+                }
+
+                r = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL);
+                if (r == 0)
+                        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 {
+                        bool print_warning = kmod_table[i].warn_if_unavailable || (r < 0 && r != -ENOENT);
+
+                        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;
+}
-- 
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