static int
memguard_sysctl_desc(SYSCTL_HANDLER_ARGS)
{
char desc[sizeof(vm_memguard_desc)];
int error;
strlcpy(desc, vm_memguard_desc, sizeof(desc));
error = sysctl_handle_string(oidp, desc, sizeof(desc), req);
if (error != 0 || req->newptr == NULL)
return (error);
mtx_lock(&malloc_mtx);
/* If mtp is NULL, it will be initialized in memguard_cmp() */
vm_memguard_mtype = malloc_desc2type(desc);
strlcpy(vm_memguard_desc, desc, sizeof(vm_memguard_desc));
mtx_unlock(&malloc_mtx);
return (error);
}
static int
memguard_sysctl_desc(SYSCTL_HANDLER_ARGS)
{
struct malloc_type_internal *mtip;
struct malloc_type_stats *mtsp;
struct malloc_type *mtp;
char desc[128];
long bytes;
int error, i;
strlcpy(desc, vm_memguard_desc, sizeof(desc));
error = sysctl_handle_string(oidp, desc, sizeof(desc), req);
if (error != 0 || req->newptr == NULL)
return (error);
/*
* We can change memory type when no memory has been allocated for it
* or when there is no such memory type yet (ie. it will be loaded with
* kernel module).
*/
bytes = 0;
mtx_lock(&malloc_mtx);
mtp = malloc_desc2type(desc);
if (mtp != NULL) {
mtip = mtp->ks_handle;
for (i = 0; i < MAXCPU; i++) {
mtsp = &mtip->mti_stats[i];
bytes += mtsp->mts_memalloced;
bytes -= mtsp->mts_memfreed;
}
}
if (bytes > 0)
error = EBUSY;
else {
/*
* If mtp is NULL, it will be initialized in memguard_cmp().
*/
vm_memguard_mtype = mtp;
strlcpy(vm_memguard_desc, desc, sizeof(vm_memguard_desc));
}
mtx_unlock(&malloc_mtx);
return (error);
}
