insmod: clarify module_name / file_name distinction

3 files changed, 18 insertions, 10 deletions

diff --git a/modutils/insmod.c b/modutils/insmod.c
index 61ee500..4d211f5 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -16,9 +16,17 @@ int insmod_main(int argc UNUSED_PARAM, char **argv)
 	char *filename;
 	int rc;
 
+	/* Compat note:
+	 * 2.6 style insmod has no options and required filename
+	 * (not module name - .ko can't be omitted).
+	 * 2.4 style insmod can take module name without .ko
+	 * and performs module search in default directories
+	 * or in $MODPATH.
+	 */
+
 	USE_FEATURE_2_4_MODULES(
 		getopt32(argv, INSMOD_OPTS INSMOD_ARGS);
-		argv += optind-1;
+		argv += optind - 1;
 	);
 
 	filename = *++argv;
diff --git a/modutils/modutils-24.c b/modutils/modutils-24.c
index ae0afd4..ecab193 100644
--- a/modutils/modutils-24.c
+++ b/modutils/modutils-24.c
@@ -3810,7 +3810,7 @@ static void print_load_map(struct obj_file *f UNUSED_PARAM)
 }
 #endif
 
-int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options UNUSED_PARAM)
+int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options)
 {
 	int k_crcs;
 	unsigned long m_size;
@@ -3906,13 +3906,13 @@ int FAST_FUNC bb_init_module_24(const char *m_filename, const char *options UNUS
 
 	m_addr = create_module(m_name, m_size);
 	if (m_addr == (ElfW(Addr))(-1)) switch (errno) {
-		case EEXIST:
-			bb_error_msg_and_die("a module named %s already exists", m_name);
-		case ENOMEM:
-			bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes",
-					m_size);
-		default:
-			bb_perror_msg_and_die("create_module: %s", m_name);
+	case EEXIST:
+		bb_error_msg_and_die("a module named %s already exists", m_name);
+	case ENOMEM:
+		bb_error_msg_and_die("can't allocate kernel memory for module; needed %lu bytes",
+				m_size);
+	default:
+		bb_perror_msg_and_die("create_module: %s", m_name);
 	}
 
 #if !LOADBITS
diff --git a/modutils/modutils.h b/modutils/modutils.h
index 32ee18b..ddd4e17 100644
--- a/modutils/modutils.h
+++ b/modutils/modutils.h
@@ -23,7 +23,7 @@ const char *moderror(int err) FAST_FUNC;
 llist_t *llist_find(llist_t *first, const char *str) FAST_FUNC;
 void replace(char *s, char what, char with) FAST_FUNC;
 char *replace_underscores(char *s) FAST_FUNC;
-int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC ;
+int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC;
 char *filename2modname(const char *filename, char *modname) FAST_FUNC;
 char *parse_cmdline_module_options(char **argv) FAST_FUNC;