/* These three functions called many times, optimizing for speed.
* Users reported minute-long delays when they runn iptables repeatedly
* (iptables use modprobe to install needed kernel modules).
*/
static struct module_entry *helper_get_module(const char *module, int create)
{
char modname[MODULE_NAME_LEN];
struct module_entry *e;
llist_t *l;
unsigned i;
unsigned hash;
filename2modname(module, modname);
hash = 0;
for (i = 0; modname[i]; i++)
hash = ((hash << 5) + hash) + modname[i];
hash %= DB_HASH_SIZE;
for (l = G.db[hash]; l; l = l->link) {
e = (struct module_entry *) l->data;
if (strcmp(e->modname, modname) == 0)
return e;
}
if (!create)
return NULL;
e = xzalloc(sizeof(*e));
e->modname = xstrdup(modname);
llist_add_to(&G.db[hash], e);
return e;
}
static int pathname_matches_modname(const char *pathname, const char *modname)
{
int r;
char name[MODULE_NAME_LEN];
filename2modname(bb_get_last_path_component_nostrip(pathname), name);
r = (strcmp(name, modname) == 0);
return r;
}
int modinfo_main(int argc UNUSED_PARAM, char **argv)
{
struct modinfo_env env;
char name[MODULE_NAME_LEN];
struct utsname uts;
parser_t *parser;
char *colon, *tokens[2];
unsigned opts;
unsigned i;
env.field = NULL;
opt_complementary = "-1"; /* minimum one param */
opts = getopt32(argv, "fdalvpF:0", &env.field);
env.tags = opts & OPT_TAGS ? opts & OPT_TAGS : OPT_TAGS;
argv += optind;
uname(&uts);
parser = config_open2(
xasprintf("%s/%s/%s", CONFIG_DEFAULT_MODULES_DIR, uts.release, CONFIG_DEFAULT_DEPMOD_FILE),
fopen_for_read
);
if (!parser) {
parser = config_open2(
xasprintf("%s/%s", CONFIG_DEFAULT_MODULES_DIR, CONFIG_DEFAULT_DEPMOD_FILE),
xfopen_for_read
);
}
while (config_read(parser, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
colon = last_char_is(tokens[0], ':');
if (colon == NULL)
continue;
*colon = '\0';
filename2modname(tokens[0], name);
for (i = 0; argv[i]; i++) {
if (fnmatch(argv[i], name, 0) == 0) {
modinfo(tokens[0], uts.release, &env);
argv[i] = (char *) "";
}
}
}
if (ENABLE_FEATURE_CLEAN_UP)
config_close(parser);
for (i = 0; argv[i]; i++) {
if (argv[i][0]) {
modinfo(argv[i], uts.release, &env);
}
}
return 0;
}
static void add_module(char *filename, int namelen, struct list_head *list)
{
struct module *mod;
/* If it's a duplicate: move it to the end, so it gets
inserted where it is *first* required. */
mod = find_module(filename, list);
if (mod)
list_del(&mod->list);
else {
/* No match. Create a new module. */
mod = NOFAIL(malloc(sizeof(struct module) + namelen + 1));
memcpy(mod->filename, filename, namelen);
mod->filename[namelen] = '\0';
mod->modname = NOFAIL(malloc(namelen + 1));
filename2modname(mod->modname, mod->filename);
}
list_add_tail(&mod->list, list);
}
int rmmod_main(int argc UNUSED_PARAM, char **argv)
{
int n, err;
unsigned flags = O_NONBLOCK | O_EXCL;
/* Parse command line. */
n = getopt32(argv, "wfas"); // -s ignored
argv += optind;
if (n & 1) // --wait
flags &= ~O_NONBLOCK;
if (n & 2) // --force
flags |= O_TRUNC;
if (n & 4) {
/* Unload _all_ unused modules via NULL delete_module() call */
err = bb_delete_module(NULL, flags);
if (err && err != EFAULT)
bb_perror_msg_and_die("rmmod");
return EXIT_SUCCESS;
}
if (!*argv)
bb_show_usage();
n = ENABLE_FEATURE_2_4_MODULES && get_linux_version_code() < KERNEL_VERSION(2,6,0);
while (*argv) {
char modname[MODULE_NAME_LEN];
const char *bname;
bname = bb_basename(*argv++);
if (n)
safe_strncpy(modname, bname, MODULE_NAME_LEN);
else
filename2modname(bname, modname);
err = bb_delete_module(modname, flags);
if (err)
bb_perror_msg_and_die("can't unload module '%s'",
modname);
}
return EXIT_SUCCESS;
}
static int rmmod(int log, int verbose, const char *path, int flags)
{
long ret;
char name[strlen(path) + 1];
filename2modname(name, path);
if ((flags & O_NONBLOCK) && !(flags & O_TRUNC)) {
if (check_usage(log, name) != 0)
return 1;
}
info(log, "rmmod %s, wait=%s%s\n", name,
(flags & O_NONBLOCK) ? "no" : "yes",
(flags & O_TRUNC) ? " force" : "");
ret = delete_module(name, flags);
if (ret != 0)
error(log, "Removing '%s': %s\n", name, strerror(errno));
return ret;
}
static struct module_entry *helper_get_module(const char *module, int create)
{
char modname[MODULE_NAME_LEN];
struct module_entry *e;
llist_t *l;
filename2modname(module, modname);
for (l = G.db; l != NULL; l = l->link) {
e = (struct module_entry *) l->data;
if (strcmp(e->modname, modname) == 0)
return e;
}
if (!create)
return NULL;
e = xzalloc(sizeof(*e));
e->modname = xstrdup(modname);
llist_add_to(&G.db, e);
return e;
}
extern int rmmod_main(int argc, char **argv)
{
int n, ret = EXIT_SUCCESS;
unsigned int flags = O_NONBLOCK|O_EXCL;
#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
/* bb_common_bufsiz1 hold the module names which we ignore
but must get */
size_t bufsize = sizeof(bb_common_bufsiz1);
#endif
/* Parse command line. */
n = bb_getopt_ulflags(argc, argv, "wfa");
if((n & 1)) // --wait
flags &= ~O_NONBLOCK;
if((n & 2)) // --force
flags |= O_TRUNC;
if((n & 4)) {
/* Unload _all_ unused modules via NULL delete_module() call */
/* until the number of modules does not change */
size_t nmod = 0; /* number of modules */
size_t pnmod = -1; /* previous number of modules */
while (nmod != pnmod) {
if (syscall(__NR_delete_module, NULL, flags) != 0) {
if (errno==EFAULT)
return(ret);
bb_perror_msg_and_die("rmmod");
}
pnmod = nmod;
#ifdef CONFIG_FEATURE_QUERY_MODULE_INTERFACE
/* 1 == QM_MODULES */
if (my_query_module(NULL, 1, &bb_common_bufsiz1, &bufsize, &nmod)) {
bb_perror_msg_and_die("QM_MODULES");
}
#endif
}
return EXIT_SUCCESS;
}
if (optind == argc)
bb_show_usage();
for (n = optind; n < argc; n++) {
#ifdef CONFIG_FEATURE_2_6_MODULES
const char *afterslash;
char *module_name;
afterslash = strrchr(argv[n], '/');
if (!afterslash)
afterslash = argv[n];
else
afterslash++;
module_name = alloca(strlen(afterslash) + 1);
filename2modname(module_name, afterslash);
#else
#define module_name argv[n]
#endif
if (syscall(__NR_delete_module, module_name, flags) != 0) {
bb_perror_msg("%s", argv[n]);
ret = EXIT_FAILURE;
}
}
return(ret);
}
