/*
* Given a hash of whatever the covered tuple might be, return a pcbgroup
* index. Where RSS is supported, try to align bucket selection with RSS CPU
* affinity strategy.
*/
static __inline u_int
in_pcbgroup_getbucket(struct inpcbinfo *pcbinfo, uint32_t hash)
{
#ifdef RSS
return (rss_getbucket(hash));
#else
return (hash % pcbinfo->ipi_npcbgroups);
#endif
}
/*
* netisr CPU affinity lookup given just the hash and hashtype.
*/
u_int
rss_hash2cpuid(uint32_t hash_val, uint32_t hash_type)
{
switch (hash_type) {
case M_HASHTYPE_RSS_IPV4:
case M_HASHTYPE_RSS_TCP_IPV4:
return (rss_getcpu(rss_getbucket(hash_val)));
default:
return (NETISR_CPUID_NONE);
}
}
/*
* Query the RSS bucket associated with the given hash value and
* type.
*/
int
rss_hash2bucket(uint32_t hash_val, uint32_t hash_type, uint32_t *bucket_id)
{
switch (hash_type) {
case M_HASHTYPE_RSS_IPV4:
case M_HASHTYPE_RSS_TCP_IPV4:
case M_HASHTYPE_RSS_UDP_IPV4:
case M_HASHTYPE_RSS_IPV6:
case M_HASHTYPE_RSS_TCP_IPV6:
case M_HASHTYPE_RSS_UDP_IPV6:
*bucket_id = rss_getbucket(hash_val);
return (0);
default:
return (-1);
}
}