post 1.14.1 fixes; bump version to 1.14.21_14_2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 30 insertions, 9 deletions

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index 0339ebb40..310eebc5f 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -8,12 +8,17 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
+/* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
+ * we expect the full dependency list to be specified in modules.dep.  Older
+ * versions would only export the direct dependency list.
+ */
+
 #include "libbb.h"
 #include "modutils.h"
 #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
@@ -116,6 +121,7 @@ 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);
@@ -205,9 +211,10 @@ static int read_config(const char *path)
 
 static int do_modprobe(struct module_entry *m)
 {
-        struct module_entry *m2;
+        struct module_entry *m2 = m2; /* for compiler */
         char *fn, *options;
-        int rc = -1;
+        int rc, first;
+        llist_t *l;
 
         if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
                 DBG("skipping %s, not found in modules.dep", m->modname);
@@ -218,13 +225,25 @@ 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);
+
+        first = 1;
         rc = 0;
         while (m->deps && rc == 0) {
                 fn = llist_pop(&m->deps);
                 m2 = get_or_add_modentry(fn);
                 if (option_mask32 & MODPROBE_OPT_REMOVE) {
-                        if (bb_delete_module(m->modname, O_EXCL) != 0)
-                                rc = errno;
+                        if (m2->flags & MODULE_FLAG_LOADED) {
+                                if (bb_delete_module(m2->modname, O_EXCL) != 0) {
+                                        if (first)
+                                                rc = errno;
+                                } else {
+                                        m2->flags &= ~MODULE_FLAG_LOADED;
+                                }
+                        }
+                        /* do not error out if *deps* fail to unload */
+                        first = 0;
                 } else if (!(m2->flags & MODULE_FLAG_LOADED)) {
                         options = m2->options;
                         m2->options = NULL;
@@ -242,11 +261,10 @@ static int do_modprobe(struct module_entry *m)
                 free(fn);
         }
 
-//FIXME: what if rc < 0?
-        if (rc > 0 && !(option_mask32 & INSMOD_OPT_SILENT)) {
+        if (rc && !(option_mask32 & INSMOD_OPT_SILENT)) {
                 bb_error_msg("failed to %sload module %s: %s",
                         (option_mask32 & MODPROBE_OPT_REMOVE) ? "un" : "",
-                        m->probed_name ? m->probed_name : m->modname,
+                        m2->probed_name ? m2->probed_name : m2->modname,
                         moderror(rc)
                 );
         }
@@ -294,7 +312,8 @@ 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);
 }
@@ -344,10 +363,12 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
         if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) {
                 /* 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);
         }