void
module_register_init(const void *arg)
{
const moduledata_t* data = (const moduledata_t*) arg;
int error;
module_t mod;
mod = module_lookupbyname(data->name);
if (mod == NULL) {
#if 0
panic("module_register_init: module named %s not found", data->name);
#else
/* temporary kludge until kernel `file' attachment registers modules */
error = module_register(data, linker_kernel_file);
if (error)
panic("module_register_init: register of module failed! %d", error);
mod = module_lookupbyname(data->name);
if (mod == NULL)
panic("module_register_init: module STILL not found!");
#endif
}
error = MOD_EVENT(mod, MOD_LOAD);
if (error) {
module_unload(mod); /* ignore error */
module_release(mod);
kprintf("module_register_init: MOD_LOAD (%s, %lx, %p) error %d\n",
data->name, (u_long)(uintfptr_t)data->evhand, data->priv, error);
}
}
int
module_register(const moduledata_t *data, linker_file_t container)
{
size_t namelen;
module_t newmod;
newmod = module_lookupbyname(data->name);
if (newmod != NULL) {
kprintf("module_register: module %s already exists!\n", data->name);
return EEXIST;
}
namelen = strlen(data->name) + 1;
newmod = (module_t) kmalloc(sizeof(struct module) + namelen,
M_MODULE, M_WAITOK);
newmod->refs = 1;
newmod->id = nextid++;
newmod->name = (char *) (newmod + 1);
strcpy(newmod->name, data->name);
newmod->handler = data->evhand ? data->evhand : modevent_nop;
newmod->arg = data->priv;
bzero(&newmod->data, sizeof(newmod->data));
TAILQ_INSERT_TAIL(&modules, newmod, link);
if (container == NULL)
container = linker_current_file;
if (container)
TAILQ_INSERT_TAIL(&container->modules, newmod, flink);
newmod->file = container;
return 0;
}
int
modfind(struct proc* p, struct modfind_args* uap)
{
int error = 0;
char name[MAXMODNAME];
module_t mod;
if ((error = copyinstr(SCARG(uap, name), name, sizeof name, 0)) != 0)
goto out;
mod = module_lookupbyname(name);
if (!mod)
error = ENOENT;
else
p->p_retval[0] = mod->id;
out:
return error;
}
/*
* MPALMOSTSAFE
*/
int
sys_modfind(struct modfind_args *uap)
{
int error;
char name[MAXMODNAME];
module_t mod;
lwkt_gettoken(&mod_token);
if ((error = copyinstr(uap->name, name, sizeof name, 0)) != 0)
goto out;
mod = module_lookupbyname(name);
if (!mod)
error = ENOENT;
else
uap->sysmsg_result = mod->id;
out:
lwkt_reltoken(&mod_token);
return error;
}
