/**
* sk_alloc - All socket objects are allocated here
* @family: protocol family
* @priority: for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc)
* @prot: struct proto associated with this new sock instance
* @zero_it: if we should zero the newly allocated sock
*/
struct sock *sk_alloc(int family, gfp_t priority,
struct proto *prot, int zero_it)
{
struct sock *sk = NULL;
kmem_cache_t *slab = prot->slab;
if (slab != NULL)
sk = kmem_cache_alloc(slab, priority);
else
sk = kmalloc(prot->obj_size, priority);
if (sk) {
if (zero_it) {
memset(sk, 0, prot->obj_size);
sk->sk_family = family;
/*
* See comment in struct sock definition to understand
* why we need sk_prot_creator -acme
*/
sk->sk_prot = sk->sk_prot_creator = prot;
sock_lock_init(sk);
}
if (security_sk_alloc(sk, family, priority))
goto out_free;
if (!try_module_get(prot->owner))
goto out_free;
}
return sk;
out_free:
if (slab != NULL)
kmem_cache_free(slab, sk);
else
kfree(sk);
return NULL;
}
/**
* sk_alloc - All socket objects are allocated here
* @family - protocol family
* @priority - for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc)
* @zero_it - zeroes the allocated sock
* @slab - alternate slab
*
* All socket objects are allocated here. If @zero_it is non-zero
* it should have the size of the are to be zeroed, because the
* private slabcaches have different sizes of the generic struct sock.
* 1 has been kept as a way to say sizeof(struct sock).
*/
struct sock *sk_alloc(int family, int priority, int zero_it, kmem_cache_t *slab)
{
struct sock *sk = NULL;
if (!slab)
slab = sk_cachep;
sk = kmem_cache_alloc(slab, priority);
if (sk) {
if (zero_it) {
memset(sk, 0,
zero_it == 1 ? sizeof(struct sock) : zero_it);
sk->sk_family = family;
sock_lock_init(sk);
}
sk->sk_slab = slab;
if (security_sk_alloc(sk, family, priority)) {
kmem_cache_free(slab, sk);
sk = NULL;
}
}
return sk;
}