[git commit] cmdline module options can be disabled on "big" modutils

Denys Vlasenko vda.linux at googlemail.com
Wed Feb 1 09:14:05 UTC 2017


commit: https://git.busybox.net/busybox/commit/?id=b1d6a2c6247bae0b9f1903ba0e0d16c56f4ef556
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

Allow module options on command line to be disabled on "big" modutils.

Config FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE is renamed to
FEATURE_CMDLINE_MODULE_OPTIONS and no longer depends on !MODPROBE_SMALL

(I'm not sure if disabling this is useful on "big" modutils, but at
least the macro can serve as a marker and ensure both implementations
of same feature have consistent behavior.)

Signed-off-by: Kang-Che Sung <explorer09 at gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 modutils/Config.src       |  8 ++++++++
 modutils/insmod.c         |  6 +++---
 modutils/modprobe-small.c | 23 ++++++++---------------
 modutils/modprobe.c       |  8 +++++++-
 modutils/modutils.c       |  2 ++
 modutils/modutils.h       |  4 ++++
 6 files changed, 32 insertions(+), 19 deletions(-)

diff --git a/modutils/Config.src b/modutils/Config.src
index f2448c9..a15cce5 100644
--- a/modutils/Config.src
+++ b/modutils/Config.src
@@ -37,6 +37,14 @@ INSERT
 
 comment "Options common to multiple modutils"
 
+config FEATURE_CMDLINE_MODULE_OPTIONS
+	bool "Accept module options on modprobe command line"
+	default y
+	depends on INSMOD || MODPROBE
+	help
+	  Allow insmod and modprobe take module options from the applets'
+	  command line.
+
 config FEATURE_2_4_MODULES
 	bool "Support version 2.2/2.4 Linux kernels"
 	default n
diff --git a/modutils/insmod.c b/modutils/insmod.c
index f2c70e1..8526979 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -27,9 +27,9 @@
 
 //usage:#if !ENABLE_MODPROBE_SMALL
 //usage:#define insmod_trivial_usage
-//usage:	IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE ")
-//usage:	IF_NOT_FEATURE_2_4_MODULES("FILE ")
-//usage:	"[SYMBOL=VALUE]..."
+//usage:	IF_FEATURE_2_4_MODULES("[OPTIONS] MODULE")
+//usage:	IF_NOT_FEATURE_2_4_MODULES("FILE")
+//usage:	IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
 //usage:#define insmod_full_usage "\n\n"
 //usage:       "Load kernel module"
 //usage:	IF_FEATURE_2_4_MODULES( "\n"
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index 325f837..0424263 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -10,13 +10,6 @@
 
 /* config MODPROBE_SMALL is defined in Config.src to ensure better "make config" order */
 
-//config:config FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
-//config:	bool "Accept module options on modprobe command line"
-//config:	default y
-//config:	depends on MODPROBE_SMALL && (INSMOD || MODPROBE)
-//config:	help
-//config:	  Allow insmod and modprobe take module options from command line.
-//config:
 //config:config FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED
 //config:	bool "Skip loading of already loaded modules"
 //config:	default y
@@ -690,7 +683,7 @@ static int rmmod(const char *filename)
  * NB: also called by depmod with bogus name "/",
  * just in order to force modprobe.dep.bb creation.
 */
-#if !ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
+#if !ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 #define process_module(a,b) process_module(a)
 #define cmdline_options ""
 #endif
@@ -735,7 +728,7 @@ static int process_module(char *name, const char *cmdline_options)
 		options = xmalloc_open_read_close(opt_filename, NULL);
 		if (options)
 			replace(options, '\n', ' ');
-#if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 		if (cmdline_options) {
 			/* NB: cmdline_options always have one leading ' '
 			 * (see main()), we remove it here */
@@ -910,7 +903,7 @@ The following options are useful for people managing distributions:
 //usage:#define depmod_full_usage ""
 
 //usage:#define insmod_trivial_usage
-//usage:	"FILE" IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(" [SYMBOL=VALUE]...")
+//usage:	"FILE" IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
 //usage:#define insmod_full_usage "\n\n"
 //usage:       "Load kernel module"
 
@@ -920,7 +913,7 @@ The following options are useful for people managing distributions:
 //usage:       "Unload kernel modules"
 
 //usage:#define modprobe_trivial_usage
-//usage:	"[-rq] MODULE" IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(" [SYMBOL=VALUE]...")
+//usage:	"[-rq] MODULE" IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
 //usage:#define modprobe_full_usage "\n\n"
 //usage:       "	-r	Remove MODULE"
 //usage:     "\n	-q	Quiet"
@@ -934,7 +927,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 	int exitcode;
 #endif
 	struct utsname uts;
-	IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options = NULL;)
+	IF_FEATURE_CMDLINE_MODULE_OPTIONS(char *options = NULL;)
 
 	INIT_G();
 
@@ -998,7 +991,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 		if (!ONLY_APPLET)
 			option_mask32 |= OPT_r;
 	} else if (!ENABLE_MODPROBE || !(option_mask32 & OPT_r)) {
-# if ENABLE_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE
+# if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 	/* If not rmmod/-r, parse possible module options given on command line.
 	 * insmod/modprobe takes one module name, the rest are parameters. */
 		char **arg = argv;
@@ -1023,7 +1016,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 		if (!map)
 			bb_perror_msg_and_die("can't read '%s'", *argv);
 		if (init_module(map, len,
-			(IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(options ? options : ) "")
+			(IF_FEATURE_CMDLINE_MODULE_OPTIONS(options ? options : ) "")
 			) != 0
 		) {
 			bb_error_msg_and_die("can't insert '%s': %s",
@@ -1045,7 +1038,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 	} while (*++argv);
 
 	if (ENABLE_FEATURE_CLEAN_UP) {
-		IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(free(options);)
+		IF_FEATURE_CMDLINE_MODULE_OPTIONS(free(options);)
 	}
 	return exitcode;
 #endif /* MODPROBE || INSMOD || RMMOD */
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index cbec438..a6224fa 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -112,7 +112,7 @@
 //usage:
 //usage:#define modprobe_trivial_usage
 //usage:	"[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
-//usage:	" MODULE [SYMBOL=VALUE]..."
+//usage:	" MODULE" IF_FEATURE_CMDLINE_MODULE_OPTIONS(" [SYMBOL=VALUE]...")
 //usage:#define modprobe_full_usage "\n\n"
 //usage:       "	-a	Load multiple MODULEs"
 //usage:     "\n	-l	List (MODULE is a pattern)"
@@ -174,7 +174,9 @@ static const char modprobe_longopts[] ALIGN1 =
 
 struct globals {
 	llist_t *probes; /* MEs of module(s) requested on cmdline */
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 	char *cmdline_mopts; /* module options from cmdline */
+#endif
 	int num_unresolved_deps;
 	/* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
 	smallint need_symbols;
@@ -458,8 +460,10 @@ static int do_modprobe(struct module_entry *m)
 		options = m2->options;
 		m2->options = NULL;
 		options = parse_and_add_kcmdline_module_options(options, m2->modname);
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 		if (m == m2)
 			options = gather_options_str(options, G.cmdline_mopts);
+#endif
 
 		if (option_mask32 & OPT_SHOW_DEPS) {
 			printf(options ? "insmod %s/%s/%s %s\n"
@@ -626,7 +630,9 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 		/* First argument is module name, rest are parameters */
 		DBG("probing just module %s", *argv);
 		add_probe(argv[0]);
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 		G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
+#endif
 	}
 
 	/* Happens if all requested modules are already loaded */
diff --git a/modutils/modutils.c b/modutils/modutils.c
index 4204f06..dae623e 100644
--- a/modutils/modutils.c
+++ b/modutils/modutils.c
@@ -120,6 +120,7 @@ char* FAST_FUNC filename2modname(const char *filename, char *modname)
 	return modname;
 }
 
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 char* FAST_FUNC parse_cmdline_module_options(char **argv, int quote_spaces)
 {
 	char *options;
@@ -155,6 +156,7 @@ char* FAST_FUNC parse_cmdline_module_options(char **argv, int quote_spaces)
 	/* if (optlen != 0) options[optlen-1] = '\0'; */
 	return options;
 }
+#endif
 
 #if ENABLE_FEATURE_INSMOD_TRY_MMAP
 void* FAST_FUNC try_to_mmap_module(const char *filename, size_t *image_size_p)
diff --git a/modutils/modutils.h b/modutils/modutils.h
index 2cbd144..76ce242 100644
--- a/modutils/modutils.h
+++ b/modutils/modutils.h
@@ -51,7 +51,11 @@ 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;
 char *filename2modname(const char *filename, char *modname) FAST_FUNC;
+#if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
 char *parse_cmdline_module_options(char **argv, int quote_spaces) FAST_FUNC;
+#else
+# define parse_cmdline_module_options(argv, quote_spaces) ""
+#endif
 
 /* insmod for 2.4 and modprobe's options (insmod 2.6 has no options at all): */
 #define INSMOD_OPTS \


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