static __inline__ struct frag_queue *
fq_find(struct net *net, __be32 id, struct in6_addr *src, struct in6_addr *dst,
struct inet6_dev *idev)
{
struct inet_frag_queue *q;
struct ip6_create_arg arg;
unsigned int hash;
arg.id = id;
arg.user = IP6_DEFRAG_LOCAL_DELIVER;
arg.src = src;
arg.dst = dst;
read_lock(&ip6_frags.lock);
hash = ip6qhashfn(id, src, dst);
q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
if (q == NULL)
goto oom;
return container_of(q, struct frag_queue, q);
oom:
IP6_INC_STATS_BH(idev, IPSTATS_MIB_REASMFAILS);
return NULL;
}
static unsigned int ip6_hashfn(struct inet_frag_queue *q)
{
struct frag_queue *fq;
fq = container_of(q, struct frag_queue, q);
return ip6qhashfn(fq->id, &fq->saddr, &fq->daddr);
}
static __inline__ struct nf_ct_frag6_queue *
fq_find(u32 id, struct in6_addr *src, struct in6_addr *dst)
{
struct nf_ct_frag6_queue *fq;
unsigned int hash = ip6qhashfn(id, src, dst);
read_lock(&nf_ct_frag6_lock);
for (fq = nf_ct_frag6_hash[hash]; fq; fq = fq->next) {
if (fq->id == id &&
!ipv6_addr_cmp(src, &fq->saddr) &&
!ipv6_addr_cmp(dst, &fq->daddr)) {
atomic_inc(&fq->refcnt);
read_unlock(&nf_ct_frag6_lock);
return fq;
}
}
read_unlock(&nf_ct_frag6_lock);
return nf_ct_frag6_create(hash, id, src, dst);
}
static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
{
unsigned long now = jiffies;
int i;
write_lock(&nf_ct_frag6_lock);
get_random_bytes(&nf_ct_frag6_hash_rnd, sizeof(u32));
for (i = 0; i < FRAG6Q_HASHSZ; i++) {
struct nf_ct_frag6_queue *q;
q = nf_ct_frag6_hash[i];
while (q) {
struct nf_ct_frag6_queue *next = q->next;
unsigned int hval = ip6qhashfn(q->id,
&q->saddr,
&q->daddr);
if (hval != i) {
/* Unlink. */
if (q->next)
q->next->pprev = q->pprev;
*q->pprev = q->next;
/* Relink to new hash chain. */
if ((q->next = nf_ct_frag6_hash[hval]) != NULL)
q->next->pprev = &q->next;
nf_ct_frag6_hash[hval] = q;
q->pprev = &nf_ct_frag6_hash[hval];
}
q = next;
}
}
write_unlock(&nf_ct_frag6_lock);
mod_timer(&nf_ct_frag6_secret_timer, now + nf_ct_frag6_secret_interval);
}