modprobe: add more useful debug points

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index 3474964..52f5e10 100644 (file)
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -13,7 +13,7 @@
 #include <sys/utsname.h>
 #include <fnmatch.h>
 
-//#define DBG(...) bb_error_msg(__VA_ARGS__)
+//#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
 #define DBG(...) ((void)0)
 
 #define MODULE_FLAG_LOADED             0x0001
@@ -114,6 +114,7 @@ static void add_probe(const char *name)
                return;
        }
 
+       DBG("queuing %s", name);
        m->probed_name = name;
        m->flags |= MODULE_FLAG_NEED_DEPS;
        llist_add_to_end(&G.probes, m);
@@ -206,6 +207,7 @@ static int do_modprobe(struct module_entry *m)
        struct module_entry *m2;
        char *fn, *options;
        int rc = -1;
+       llist_t *l;
 
        if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
                DBG("skipping %s, not found in modules.dep", m->modname);
@@ -216,6 +218,9 @@ static int do_modprobe(struct module_entry *m)
        if (!(option_mask32 & MODPROBE_OPT_REMOVE))
                m->deps = llist_rev(m->deps);
 
+       for (l = m->deps; l != NULL; l = l->link)
+               DBG("dep: %s", l->data);
+
        rc = 0;
        while (m->deps && rc == 0) {
                fn = llist_pop(&m->deps);
@@ -292,7 +297,8 @@ static void load_modules_dep(void)
                        llist_add_to(&m->deps, xstrdup(tokens[0]));
                        if (tokens[1])
                                string_to_llist(tokens[1], &m->deps, " ");
-               }
+               } else
+                       DBG("skipping dep line");
        }
        config_close(p);
 }
@@ -342,10 +348,12 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
        if (opt & MODPROBE_OPT_INSERT_ALL) {
                /* Each argument is a module name */
                do {
+                       DBG("adding module %s", *argv);
                        add_probe(*argv++);
                } while (*argv);
        } else {
                /* First argument is module name, rest are parameters */
+               DBG("probing just module %s", *argv);
                add_probe(argv[0]);
                G.cmdline_mopts = parse_cmdline_module_options(argv);
        }