static int check_module_inuse(struct kmod_module *mod) {
struct kmod_list *holders;
if (kmod_module_get_initstate(mod) == -ENOENT) {
ERR("Module %s is not currently loaded\n",
kmod_module_get_name(mod));
return -ENOENT;
}
holders = kmod_module_get_holders(mod);
if (holders != NULL) {
struct kmod_list *itr;
ERR("Module %s is in use by:", kmod_module_get_name(mod));
kmod_list_foreach(itr, holders) {
struct kmod_module *hm = kmod_module_get_module(itr);
fprintf(stderr, " %s", kmod_module_get_name(hm));
kmod_module_unref(hm);
}
fputc('\n', stderr);
kmod_module_unref_list(holders);
return -EBUSY;
}
if (kmod_module_get_refcnt(mod) != 0) {
ERR("Module %s is in use\n", kmod_module_get_name(mod));
return -EBUSY;
}
return 0;
}
static int load_module(struct kmod_ctx *ctx, const char *m) {
const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
struct kmod_list *itr, *modlist = NULL;
int r = 0;
log_debug("load: %s", m);
r = kmod_module_new_from_lookup(ctx, m, &modlist);
if (r < 0) {
log_error("Failed to lookup alias '%s': %s", m, strerror(-r));
return r;
}
if (!modlist) {
log_error("Failed to find module '%s'", m);
return -ENOENT;
}
kmod_list_foreach(itr, modlist) {
struct kmod_module *mod;
int state, err;
mod = kmod_module_get_module(itr);
state = kmod_module_get_initstate(mod);
switch (state) {
case KMOD_MODULE_BUILTIN:
log_info("Module '%s' is builtin", kmod_module_get_name(mod));
break;
case KMOD_MODULE_LIVE:
log_debug("Module '%s' is already loaded", kmod_module_get_name(mod));
break;
default:
err = kmod_module_probe_insert_module(mod, probe_flags,
NULL, NULL, NULL, NULL);
if (err == 0)
log_info("Inserted module '%s'", kmod_module_get_name(mod));
else if (err == KMOD_PROBE_APPLY_BLACKLIST)
log_info("Module '%s' is blacklisted", kmod_module_get_name(mod));
else {
log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
strerror(-err));
r = err;
}
}
kmod_module_unref(mod);
}
kmod_module_unref_list(modlist);
return r;
}
/** Check which state a module is in
*
* @return 1 if loaded, 0 when not loaded
*/
static int module_state_check(const char *module)
{
int ret = 0;
struct kmod_module *mod;
kmod_module_new_from_name(ctx, module, &mod);
ret = kmod_module_get_initstate(mod);
kmod_module_unref(mod);
if( ret == KMOD_MODULE_LIVE)
return(1);
else
return(0);
}
/**
* Checks whether a kernel module is loaded
*
* @param driver The name of the driver (not a filename)
* @return 1 if the module is loaded, 0 otherwise
*/
int module_is_loaded(char *driver) {
int err, state;
struct kmod_module *mod;
err = kmod_module_new_from_name(bb_status.kmod_ctx, driver, &mod);
if (err < 0) {
bb_log(LOG_DEBUG, "kmod_module_new_from_name(%s) failed (err: %d).\n",
driver, err);
return 0;
}
state = kmod_module_get_initstate(mod);
kmod_module_unref(mod);
return state == KMOD_MODULE_LIVE;
}
static int check_module_inuse(struct kmod_module *mod) {
struct kmod_list *holders;
int state, ret;
state = kmod_module_get_initstate(mod);
if (state == KMOD_MODULE_BUILTIN) {
ERR("Module %s is builtin.\n", kmod_module_get_name(mod));
return -ENOENT;
} else if (state < 0) {
ERR("Module %s is not currently loaded\n",
kmod_module_get_name(mod));
return -ENOENT;
}
holders = kmod_module_get_holders(mod);
if (holders != NULL) {
struct kmod_list *itr;
ERR("Module %s is in use by:", kmod_module_get_name(mod));
kmod_list_foreach(itr, holders) {
struct kmod_module *hm = kmod_module_get_module(itr);
fprintf(stderr, " %s", kmod_module_get_name(hm));
kmod_module_unref(hm);
}
fputc('\n', stderr);
kmod_module_unref_list(holders);
return -EBUSY;
}
ret = kmod_module_get_refcnt(mod);
if (ret > 0) {
ERR("Module %s is in use\n", kmod_module_get_name(mod));
return -EBUSY;
} else if (ret == -ENOENT) {
ERR("Module unloading is not supported\n");
}
return ret;
}
static int load_module(struct kmod_ctx *ctx, const char *m) {
struct kmod_list *itr, *modlist = NULL;
const int probe_flags = KMOD_PROBE_APPLY_BLACKLIST;
const char *options = "luns=8 iSerialNumber=1234000 ro=1";
int r = 0;
r = kmod_module_new_from_lookup(ctx, m, &modlist);
if (r < 0) {
printf("ERROR: Failed to lookup alias '%s': %s\n", m, strerror(-r));
}
if (!modlist) {
printf("ERROR: Failed to find module '%s'\n", m);
return -ENOENT;
}
kmod_list_foreach(itr, modlist) {
struct kmod_module *mod;
int state, err;
mod = kmod_module_get_module(itr);
state = kmod_module_get_initstate(mod);
switch (state) {
case KMOD_MODULE_BUILTIN:
printf("Module '%s' is builtin\n", kmod_module_get_name(mod));
break;
case KMOD_MODULE_LIVE:
printf("Module '%s' is already loaded\n", kmod_module_get_name(mod));
//printf("Unloading module '%s'...\n", kmod_module_get_name(mod));
//err = kmod_module_remove_module(mod, KMOD_REMOVE_FORCE);
//if (err == 0)
//{
// printf("Successfully removed module '%s'\n", kmod_module_get_name(mod));
// r = EAGAIN;
//}
//else
//{
// printf("ERROR: Module '%s' can't be removed\n", kmod_module_get_name(mod));
// r = err;
//}
break;
default:
err = kmod_module_probe_insert_module(mod, probe_flags, options, NULL, NULL, NULL);
if (err == 0)
printf("Inserted module '%s'\n", kmod_module_get_name(mod));
else if (err == KMOD_PROBE_APPLY_BLACKLIST)
printf("Module '%s' is blacklisted\n", kmod_module_get_name(mod));
else {
printf("ERROR: Failed to insert '%s': %s\n", kmod_module_get_name(mod), strerror(-err));
r = err;
}
}
kmod_module_unref(mod);
}
kmod_module_unref_list(modlist);
return r;
}
static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies)
{
const char *modname = kmod_module_get_name(mod);
struct kmod_list *pre = NULL, *post = NULL;
const char *cmd = NULL;
int err;
if (!ignore_commands) {
err = kmod_module_get_softdeps(mod, &pre, &post);
if (err < 0) {
WRN("could not get softdeps of '%s': %s\n",
modname, strerror(-err));
return err;
}
cmd = kmod_module_get_remove_commands(mod);
}
if (cmd == NULL && !ignore_loaded) {
int state = kmod_module_get_initstate(mod);
if (state < 0) {
LOG ("Module %s not found.\n", modname);
err = -ENOENT;
goto error;
} else if (state == KMOD_MODULE_BUILTIN) {
LOG("Module %s is builtin.\n", modname);
err = -ENOENT;
goto error;
} else if (state != KMOD_MODULE_LIVE) {
if (first_time) {
LOG("Module %s is not in kernel.\n", modname);
err = -ENOENT;
goto error;
} else {
err = 0;
goto error;
}
}
}
rmmod_do_deps_list(post, false);
if (do_dependencies && remove_dependencies) {
struct kmod_list *deps = kmod_module_get_dependencies(mod);
err = rmmod_do_deps_list(deps, true);
if (err < 0)
goto error;
}
if (!ignore_loaded) {
int usage = kmod_module_get_refcnt(mod);
if (usage > 0) {
if (!quiet_inuse)
LOG("Module %s is in use.\n", modname);
err = -EBUSY;
goto error;
}
}
if (cmd == NULL)
err = rmmod_do_remove_module(mod);
else
err = command_do(mod, "remove", cmd, NULL);
if (err < 0)
goto error;
rmmod_do_deps_list(pre, false);
error:
kmod_module_unref_list(pre);
kmod_module_unref_list(post);
return err;
}