Initial commit from HTC m7ul-3.4.10-jb-crc-ddcfb8c
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
new file mode 100644
index 0000000..9010090
--- /dev/null
+++ b/include/net/inet_hashtables.h
@@ -0,0 +1,329 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Authors: Lotsa people, from code originally in tcp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _INET_HASHTABLES_H
+#define _INET_HASHTABLES_H
+
+
+#include <linux/interrupt.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/socket.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+#include <linux/vmalloc.h>
+
+#include <net/inet_connection_sock.h>
+#include <net/inet_sock.h>
+#include <net/sock.h>
+#include <net/route.h>
+#include <net/tcp_states.h>
+#include <net/netns/hash.h>
+
+#include <linux/atomic.h>
+#include <asm/byteorder.h>
+
+struct inet_ehash_bucket {
+ struct hlist_nulls_head chain;
+ struct hlist_nulls_head twchain;
+};
+
+struct inet_bind_bucket {
+#ifdef CONFIG_NET_NS
+ struct net *ib_net;
+#endif
+ unsigned short port;
+ signed short fastreuse;
+ int num_owners;
+ struct hlist_node node;
+ struct hlist_head owners;
+};
+
+static inline struct net *ib_net(struct inet_bind_bucket *ib)
+{
+ return read_pnet(&ib->ib_net);
+}
+
+#define inet_bind_bucket_for_each(tb, pos, head) \
+ hlist_for_each_entry(tb, pos, head, node)
+
+struct inet_bind_hashbucket {
+ spinlock_t lock;
+ struct hlist_head chain;
+};
+
+#define LISTENING_NULLS_BASE (1U << 29)
+struct inet_listen_hashbucket {
+ spinlock_t lock;
+ struct hlist_nulls_head head;
+};
+
+#define INET_LHTABLE_SIZE 32
+
+struct inet_hashinfo {
+ struct inet_ehash_bucket *ehash;
+ spinlock_t *ehash_locks;
+ unsigned int ehash_mask;
+ unsigned int ehash_locks_mask;
+
+ struct inet_bind_hashbucket *bhash;
+
+ unsigned int bhash_size;
+
+
+ struct kmem_cache *bind_bucket_cachep;
+
+ /* All the above members are written once at bootup and
+ * never written again _or_ are predominantly read-access.
+ *
+ * Now align to a new cache line as all the following members
+ * might be often dirty.
+ */
+ struct inet_listen_hashbucket listening_hash[INET_LHTABLE_SIZE]
+ ____cacheline_aligned_in_smp;
+
+ atomic_t bsockets;
+};
+
+static inline struct inet_ehash_bucket *inet_ehash_bucket(
+ struct inet_hashinfo *hashinfo,
+ unsigned int hash)
+{
+ return &hashinfo->ehash[hash & hashinfo->ehash_mask];
+}
+
+static inline spinlock_t *inet_ehash_lockp(
+ struct inet_hashinfo *hashinfo,
+ unsigned int hash)
+{
+ return &hashinfo->ehash_locks[hash & hashinfo->ehash_locks_mask];
+}
+
+static inline int inet_ehash_locks_alloc(struct inet_hashinfo *hashinfo)
+{
+ unsigned int i, size = 256;
+#if defined(CONFIG_PROVE_LOCKING)
+ unsigned int nr_pcpus = 2;
+#else
+ unsigned int nr_pcpus = num_possible_cpus();
+#endif
+ if (nr_pcpus >= 4)
+ size = 512;
+ if (nr_pcpus >= 8)
+ size = 1024;
+ if (nr_pcpus >= 16)
+ size = 2048;
+ if (nr_pcpus >= 32)
+ size = 4096;
+ if (sizeof(spinlock_t) != 0) {
+#ifdef CONFIG_NUMA
+ if (size * sizeof(spinlock_t) > PAGE_SIZE)
+ hashinfo->ehash_locks = vmalloc(size * sizeof(spinlock_t));
+ else
+#endif
+ hashinfo->ehash_locks = kmalloc(size * sizeof(spinlock_t),
+ GFP_KERNEL);
+ if (!hashinfo->ehash_locks)
+ return ENOMEM;
+ for (i = 0; i < size; i++)
+ spin_lock_init(&hashinfo->ehash_locks[i]);
+ }
+ hashinfo->ehash_locks_mask = size - 1;
+ return 0;
+}
+
+static inline void inet_ehash_locks_free(struct inet_hashinfo *hashinfo)
+{
+ if (hashinfo->ehash_locks) {
+#ifdef CONFIG_NUMA
+ unsigned int size = (hashinfo->ehash_locks_mask + 1) *
+ sizeof(spinlock_t);
+ if (size > PAGE_SIZE)
+ vfree(hashinfo->ehash_locks);
+ else
+#endif
+ kfree(hashinfo->ehash_locks);
+ hashinfo->ehash_locks = NULL;
+ }
+}
+
+extern struct inet_bind_bucket *
+ inet_bind_bucket_create(struct kmem_cache *cachep,
+ struct net *net,
+ struct inet_bind_hashbucket *head,
+ const unsigned short snum);
+extern void inet_bind_bucket_destroy(struct kmem_cache *cachep,
+ struct inet_bind_bucket *tb);
+
+static inline int inet_bhashfn(struct net *net,
+ const __u16 lport, const int bhash_size)
+{
+ return (lport + net_hash_mix(net)) & (bhash_size - 1);
+}
+
+extern void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
+ const unsigned short snum);
+
+static inline int inet_lhashfn(struct net *net, const unsigned short num)
+{
+ return (num + net_hash_mix(net)) & (INET_LHTABLE_SIZE - 1);
+}
+
+static inline int inet_sk_listen_hashfn(const struct sock *sk)
+{
+ return inet_lhashfn(sock_net(sk), inet_sk(sk)->inet_num);
+}
+
+extern int __inet_inherit_port(struct sock *sk, struct sock *child);
+
+extern void inet_put_port(struct sock *sk);
+
+void inet_hashinfo_init(struct inet_hashinfo *h);
+
+extern int __inet_hash_nolisten(struct sock *sk, struct inet_timewait_sock *tw);
+extern void inet_hash(struct sock *sk);
+extern void inet_unhash(struct sock *sk);
+
+extern struct sock *__inet_lookup_listener(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ const __be32 daddr,
+ const unsigned short hnum,
+ const int dif);
+
+static inline struct sock *inet_lookup_listener(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ __be32 daddr, __be16 dport, int dif)
+{
+ return __inet_lookup_listener(net, hashinfo, daddr, ntohs(dport), dif);
+}
+
+typedef __u32 __bitwise __portpair;
+#ifdef __BIG_ENDIAN
+#define INET_COMBINED_PORTS(__sport, __dport) \
+ ((__force __portpair)(((__force __u32)(__be16)(__sport) << 16) | (__u32)(__dport)))
+#else
+#define INET_COMBINED_PORTS(__sport, __dport) \
+ ((__force __portpair)(((__u32)(__dport) << 16) | (__force __u32)(__be16)(__sport)))
+#endif
+
+#if (BITS_PER_LONG == 64)
+typedef __u64 __bitwise __addrpair;
+#ifdef __BIG_ENDIAN
+#define INET_ADDR_COOKIE(__name, __saddr, __daddr) \
+ const __addrpair __name = (__force __addrpair) ( \
+ (((__force __u64)(__be32)(__saddr)) << 32) | \
+ ((__force __u64)(__be32)(__daddr)));
+#else
+#define INET_ADDR_COOKIE(__name, __saddr, __daddr) \
+ const __addrpair __name = (__force __addrpair) ( \
+ (((__force __u64)(__be32)(__daddr)) << 32) | \
+ ((__force __u64)(__be32)(__saddr)));
+#endif
+#define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
+ (((__sk)->sk_hash == (__hash)) && net_eq(sock_net(__sk), (__net)) && \
+ ((*((__addrpair *)&(inet_sk(__sk)->inet_daddr))) == (__cookie)) && \
+ ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
+ (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
+#define INET_TW_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif)\
+ (((__sk)->sk_hash == (__hash)) && net_eq(sock_net(__sk), (__net)) && \
+ ((*((__addrpair *)&(inet_twsk(__sk)->tw_daddr))) == (__cookie)) && \
+ ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) && \
+ (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
+#else
+#define INET_ADDR_COOKIE(__name, __saddr, __daddr)
+#define INET_MATCH(__sk, __net, __hash, __cookie, __saddr, __daddr, __ports, __dif) \
+ (((__sk)->sk_hash == (__hash)) && net_eq(sock_net(__sk), (__net)) && \
+ (inet_sk(__sk)->inet_daddr == (__saddr)) && \
+ (inet_sk(__sk)->inet_rcv_saddr == (__daddr)) && \
+ ((*((__portpair *)&(inet_sk(__sk)->inet_dport))) == (__ports)) && \
+ (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
+#define INET_TW_MATCH(__sk, __net, __hash,__cookie, __saddr, __daddr, __ports, __dif) \
+ (((__sk)->sk_hash == (__hash)) && net_eq(sock_net(__sk), (__net)) && \
+ (inet_twsk(__sk)->tw_daddr == (__saddr)) && \
+ (inet_twsk(__sk)->tw_rcv_saddr == (__daddr)) && \
+ ((*((__portpair *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) && \
+ (!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
+#endif
+
+extern struct sock * __inet_lookup_established(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ const __be32 saddr, const __be16 sport,
+ const __be32 daddr, const u16 hnum, const int dif);
+
+static inline struct sock *
+ inet_lookup_established(struct net *net, struct inet_hashinfo *hashinfo,
+ const __be32 saddr, const __be16 sport,
+ const __be32 daddr, const __be16 dport,
+ const int dif)
+{
+ return __inet_lookup_established(net, hashinfo, saddr, sport, daddr,
+ ntohs(dport), dif);
+}
+
+static inline struct sock *__inet_lookup(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ const __be32 saddr, const __be16 sport,
+ const __be32 daddr, const __be16 dport,
+ const int dif)
+{
+ u16 hnum = ntohs(dport);
+ struct sock *sk = __inet_lookup_established(net, hashinfo,
+ saddr, sport, daddr, hnum, dif);
+
+ return sk ? : __inet_lookup_listener(net, hashinfo, daddr, hnum, dif);
+}
+
+static inline struct sock *inet_lookup(struct net *net,
+ struct inet_hashinfo *hashinfo,
+ const __be32 saddr, const __be16 sport,
+ const __be32 daddr, const __be16 dport,
+ const int dif)
+{
+ struct sock *sk;
+
+ local_bh_disable();
+ sk = __inet_lookup(net, hashinfo, saddr, sport, daddr, dport, dif);
+ local_bh_enable();
+
+ return sk;
+}
+
+static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
+ struct sk_buff *skb,
+ const __be16 sport,
+ const __be16 dport)
+{
+ struct sock *sk;
+ const struct iphdr *iph = ip_hdr(skb);
+
+ if (unlikely(sk = skb_steal_sock(skb)))
+ return sk;
+ else
+ return __inet_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
+ iph->saddr, sport,
+ iph->daddr, dport, inet_iif(skb));
+}
+
+extern int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+ struct sock *sk,
+ u32 port_offset,
+ int (*check_established)(struct inet_timewait_death_row *,
+ struct sock *, __u16, struct inet_timewait_sock **),
+ int (*hash)(struct sock *sk, struct inet_timewait_sock *twp));
+
+extern int inet_hash_connect(struct inet_timewait_death_row *death_row,
+ struct sock *sk);
+#endif