From e4e911e7124fca9116ca14c31f125b687d0ae57e Mon Sep 17 00:00:00 2001 From: Serj Kalichev Date: Sun, 26 Dec 2010 01:56:19 +0100 Subject: modprobe: add support for --show-depends function old new delta modprobe_longopts - 16 +16 packed_usage 28018 28028 +10 modprobe_main 648 653 +5 do_modprobe 580 536 -44 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/1 up/down: 31/-44) Total: -13 bytes Signed-off-by: Serj Kalichev Signed-off-by: Denys Vlasenko --- modutils/modprobe.c | 95 +++++++++++++++++++++++++++++++++-------------------- 1 file changed, 60 insertions(+), 35 deletions(-) (limited to 'modutils/modprobe.c') diff --git a/modutils/modprobe.c b/modutils/modprobe.c index a5cf4babf..8e83f4107 100644 --- a/modutils/modprobe.c +++ b/modutils/modprobe.c @@ -72,19 +72,21 @@ //usage: " from the command line\n" //usage: //usage:#define modprobe_trivial_usage -//usage: "[-alrqvs" -//usage: IF_FEATURE_MODPROBE_BLACKLIST("b") -//usage: "] MODULE [symbol=value]..." +//usage: "[-alrqvs" IF_FEATURE_MODPROBE_BLACKLIST("b") "]" +//usage: IF_LONG_OPTS(" [--show-depends]") " MODULE [symbol=value]..." //usage:#define modprobe_full_usage "\n\n" //usage: "Options:" -//usage: "\n -a Load multiple MODULEs" -//usage: "\n -l List (MODULE is a pattern)" -//usage: "\n -r Remove MODULE (stacks) or do autoclean" -//usage: "\n -q Quiet" -//usage: "\n -v Verbose" -//usage: "\n -s Log to syslog" +//usage: "\n -a Load multiple MODULEs" +//usage: "\n -l List (MODULE is a pattern)" +//usage: "\n -r Remove MODULE (stacks) or do autoclean" +//usage: "\n -q Quiet" +//usage: "\n -v Verbose" +//usage: "\n -s Log to syslog" //usage: IF_FEATURE_MODPROBE_BLACKLIST( -//usage: "\n -b Apply blacklist to module names too" +//usage: "\n -b Apply blacklist to module names too" +//usage: ) +//usage: IF_LONG_OPTS( +//usage: "\n --show-depends Show dependencies" //usage: ) //usage:#endif /* !ENABLE_MODPROBE_SMALL */ @@ -101,24 +103,35 @@ * Older versions would only export the direct dependency list. */ + /* Note that usage text doesn't document various 2.4 options * we pull in through INSMOD_OPTS define */ - -#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--ar:a--lr:r--al" #define MODPROBE_OPTS "alr" IF_FEATURE_MODPROBE_BLACKLIST("b") -//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al" +#undef SD +#if ENABLE_LONG_OPTS +static const char modprobe_longopts[] ALIGN1 = + "show-depends\0" No_argument "\xff" + ; +# define SD "\xff" +#else +# define SD "" +#endif +#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--ar"SD":a--lr"SD":r--al"SD IF_LONG_OPTS(":\xff--arl")) //#define MODPROBE_OPTS "acd:lnrt:C:" IF_FEATURE_MODPROBE_BLACKLIST("b") +//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al" enum { - MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */ - //MODPROBE_OPT_DUMP_ONLY= (INSMOD_OPT_UNUSED << x), /* c */ - //MODPROBE_OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */ - MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */ - //MODPROBE_OPT_SHOW_ONLY= (INSMOD_OPT_UNUSED << x), /* n */ - MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */ - //MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */ - //MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */ - //MODPROBE_OPT_CONFIGFILE=(INSMOD_OPT_UNUSED << x), /* C */ - MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST, + OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */ + //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */ + //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */ + OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */ + //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */ + OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */ + //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */ + //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */ + //OPT_CONFIGFILE =(INSMOD_OPT_UNUSED << x), /* C */ + OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST, + OPTBIT_SHOW_DEPS = (3 + ENABLE_FEATURE_MODPROBE_BLACKLIST), + OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << OPTBIT_SHOW_DEPS) * ENABLE_LONG_OPTS, }; #define MODULE_FLAG_LOADED 0x0001 @@ -145,9 +158,13 @@ struct globals { int num_unresolved_deps; /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */ smallint need_symbols; + struct utsname uts; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define INIT_G() do { } while (0) +struct BUG_G_too_big { + char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1]; +}; static int read_config(const char *path); @@ -202,7 +219,7 @@ static void add_probe(const char *name) struct module_entry *m; m = get_or_add_modentry(name); - if (!(option_mask32 & MODPROBE_OPT_REMOVE) + if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS)) && (m->flags & MODULE_FLAG_LOADED) ) { DBG("skipping %s, it is already loaded", name); @@ -366,7 +383,7 @@ static int do_modprobe(struct module_entry *m) } DBG("do_modprob'ing %s", m->modname); - if (!(option_mask32 & MODPROBE_OPT_REMOVE)) + if (!(option_mask32 & OPT_REMOVE)) m->deps = llist_rev(m->deps); for (l = m->deps; l != NULL; l = l->link) @@ -379,7 +396,13 @@ static int do_modprobe(struct module_entry *m) fn = llist_pop(&m->deps); /* we leak it */ m2 = get_or_add_modentry(fn); - if (option_mask32 & MODPROBE_OPT_REMOVE) { + if (option_mask32 & OPT_SHOW_DEPS) { + printf("insmod %s/%s/%s\n", CONFIG_DEFAULT_MODULES_DIR, + G.uts.release, fn); + continue; + } + + if (option_mask32 & OPT_REMOVE) { /* modprobe -r */ if (m2->flags & MODULE_FLAG_LOADED) { rc = bb_delete_module(m2->modname, O_EXCL); @@ -456,7 +479,7 @@ static void load_modules_dep(void) /* Optimization... */ if ((m->flags & MODULE_FLAG_LOADED) - && !(option_mask32 & MODPROBE_OPT_REMOVE) + && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS)) ) { DBG("skip deps of %s, it's already loaded", tokens[0]); continue; @@ -477,21 +500,23 @@ static void load_modules_dep(void) int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int modprobe_main(int argc UNUSED_PARAM, char **argv) { - struct utsname uts; int rc; unsigned opt; struct module_entry *me; + INIT_G(); + + IF_LONG_OPTS(applet_long_options = modprobe_longopts;) opt_complementary = MODPROBE_COMPLEMENTARY; opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS); argv += optind; /* Goto modules location */ xchdir(CONFIG_DEFAULT_MODULES_DIR); - uname(&uts); - xchdir(uts.release); + uname(&G.uts); + xchdir(G.uts.release); - if (opt & MODPROBE_OPT_LIST_ONLY) { + if (opt & OPT_LIST_ONLY) { char name[MODULE_NAME_LEN]; char *colon, *tokens[2]; parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read); @@ -521,7 +546,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv) logmode = LOGMODE_SYSLOG; if (!argv[0]) { - if (opt & MODPROBE_OPT_REMOVE) { + if (opt & OPT_REMOVE) { /* "modprobe -r" (w/o params). * "If name is NULL, all unused modules marked * autoclean will be removed". @@ -541,7 +566,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv) config_close(parser); } - if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) { + if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) { /* Each argument is a module name */ do { DBG("adding module %s", *argv); @@ -575,7 +600,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv) /* This is not an alias. Literal names are blacklisted * only if '-b' is given. */ - if (!(opt & MODPROBE_OPT_BLACKLIST) + if (!(opt & OPT_BLACKLIST) || !(me->flags & MODULE_FLAG_BLACKLISTED) ) { rc |= do_modprobe(me); @@ -592,7 +617,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv) m2 = get_or_add_modentry(realname); if (!(m2->flags & MODULE_FLAG_BLACKLISTED) && (!(m2->flags & MODULE_FLAG_LOADED) - || (opt & MODPROBE_OPT_REMOVE)) + || (opt & (OPT_REMOVE | OPT_SHOW_DEPS))) ) { //TODO: we can pass "me" as 2nd param to do_modprobe, //and make do_modprobe emit more meaningful error messages -- cgit v1.2.3