This is primarily to satiate the usage by docker/libnetwork.
Behaviour mirrors /tools/modprobe.c from https://git.kernel.org

Signed-off-by: Gerard Ryan <[email protected]>
---
Compile tested: x86_x64, Hyper-V, OpenWrt Master
Run tested: x86_x64, Hyper-V, OpenWrt Master

You can also find this patch on GitHub if you prefer.
https://github.com/G-M0N3Y-2503/openwrt-ubox-mirror/tree/feature_extend_modprobe_options

 kmodloader.c | 76 +++++++++++++++++++++++++++++++---------------------
 1 file changed, 46 insertions(+), 30 deletions(-)

diff --git a/kmodloader.c b/kmodloader.c
index 422c895..a437509 100644
--- a/kmodloader.c
+++ b/kmodloader.c
@@ -678,7 +678,9 @@ static int print_insmod_usage(void)

 static int print_modprobe_usage(void)
 {
-       ULOG_INFO("Usage:\n\tmodprobe [-q] filename\n");
+       ULOG_INFO("Usage:\n"
+                         "\tmodprobe [-q] [-v] filename\n"
+                         "\tmodprobe -a [-q] [-v] filename [filename...]\n");

        return -1;
 }
@@ -851,18 +853,26 @@ static int main_modinfo(int argc, char **argv)

 static int main_modprobe(int argc, char **argv)
 {
+       int exit_code = EXIT_SUCCESS;
        struct module_node *mn;
        struct module *m;
-       char *name;
-       char *mod = NULL;
+       int load_fail;
+       int log_level = LOG_WARNING;
        int opt;
        bool quiet = false;
+       bool use_all = false;

-       while ((opt = getopt(argc, argv, "q")) != -1 ) {
+       while ((opt = getopt(argc, argv, "aqv")) != -1 ) {
                switch (opt) {
+                       case 'a':
+                               use_all = true;
+                               break;
                        case 'q': /* shhhh! */
                                quiet = true;
                                break;
+                       case 'v':
+                               log_level = LOG_DEBUG;
+                               break;
                        default: /* '?' */
                                return print_modprobe_usage();
                                break;
@@ -872,7 +882,8 @@ static int main_modprobe(int argc, char **argv)
        if (optind >= argc)
                return print_modprobe_usage(); /* expected module after options 
*/

-       mod = argv[optind];
+       /* after print_modprobe_usage() so it won't be filtered out */
+       ulog_threshold(log_level);

        if (scan_module_folders())
                return -1;
@@ -880,40 +891,45 @@ static int main_modprobe(int argc, char **argv)
        if (scan_loaded_modules())
                return -1;

-       name = get_module_name(mod);
-       m = find_module(name);
-       if (m && m->state == LOADED) {
-               if (!quiet)
-                       ULOG_ERR("%s is already loaded\n", name);
-               return 0;
-       } else if (!m) {
-               if (!quiet)
-                       ULOG_ERR("failed to find a module named %s\n", name);
-               return -1;
-       } else {
-               int fail;
+       do {
+               char *name;

-               m->state = PROBE;
+               name = get_module_name(argv[optind]);
+               m = find_module(name);

-               fail = load_modprobe(true);
+               if (m && m->state == LOADED) {
+                       if (!quiet)
+                               ULOG_INFO("%s is already loaded\n", name);
+               } else if (!m) {
+                       if (!quiet)
+                               ULOG_ERR("failed to find a module named %s\n", 
name);
+                       exit_code = EXIT_FAILURE;
+               } else {
+                       m->state = PROBE;
+               }

-               if (fail) {
-                       ULOG_ERR("%d module%s could not be probed\n",
-                                fail, (fail == 1) ? ("") : ("s"));
+               optind++;
+       } while (use_all && optind < argc);

-                       avl_for_each_element(&modules, mn, avl) {
-                               if (mn->is_alias)
-                                       continue;
-                               m = mn->m;
-                               if ((m->state == PROBE) || m->error)
-                                       ULOG_ERR("- %s\n", m->name);
-                       }
+       load_fail = load_modprobe(true);
+       if (load_fail) {
+               ULOG_ERR("%d module%s could not be probed\n",
+                                       load_fail, (load_fail == 1) ? ("") : 
("s"));
+
+               avl_for_each_element(&modules, mn, avl) {
+                       if (mn->is_alias)
+                               continue;
+                       m = mn->m;
+                       if ((m->state == PROBE) || m->error)
+                               ULOG_ERR("- %s\n", m->name);
                }
+
+               exit_code = EXIT_FAILURE;
        }

        free_modules();

-       return 0;
+       return exit_code;
 }

 static int main_loader(int argc, char **argv)
--
2.17.1


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