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inet: add IPv6 support to sk_ehashfn() 

Intent is to converge IPv4 & IPv6 inet_hash functions to
factorize code.

IPv4 sockets initialize sk_rcv_saddr and sk_v6_daddr
in this patch, thanks to new sk_daddr_set() and sk_rcv_saddr_set()
helpers.

__inet6_hash can now use sk_ehashfn() instead of a private
inet6_sk_ehashfn() and will simply use __inet_hash() in a
following patch.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-03-18 14:05:35 -07:00 коммит произвёл David S. Miller
Родитель 5b441f76f1
Коммит d1e559d0b1
7 изменённых файлов: 45 добавлений и 45 удалений
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19
include/net/inet_hashtables.h
Просмотреть файл

@ -384,6 +384,25 @@ static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
}
u32 sk_ehashfn(const struct sock *sk);
u32 inet6_ehashfn(const struct net *net,
const struct in6_addr *laddr, const u16 lport,
const struct in6_addr *faddr, const __be16 fport);
static inline void sk_daddr_set(struct sock *sk, __be32 addr)
{
sk->sk_daddr = addr; /* alias of inet_daddr */
#if IS_ENABLED(CONFIG_IPV6)
ipv6_addr_set_v4mapped(addr, &sk->sk_v6_daddr);
#endif
}
static inline void sk_rcv_saddr_set(struct sock *sk, __be32 addr)
{
sk->sk_rcv_saddr = addr; /* alias of inet_rcv_saddr */
#if IS_ENABLED(CONFIG_IPV6)
ipv6_addr_set_v4mapped(addr, &sk->sk_v6_rcv_saddr);
#endif
}
int __inet_hash_connect(struct inet_timewait_death_row *death_row,
struct sock *sk, u32 port_offset,

9
net/dccp/ipv4.c
Просмотреть файл

@ -89,10 +89,9 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (inet->inet_saddr == 0)
inet->inet_saddr = fl4->saddr;
inet->inet_rcv_saddr = inet->inet_saddr;
sk_rcv_saddr_set(sk, inet->inet_saddr);
inet->inet_dport = usin->sin_port;
inet->inet_daddr = daddr;
sk_daddr_set(sk, daddr);
inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet_opt)
@ -408,8 +407,8 @@ struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
newinet = inet_sk(newsk);
ireq = inet_rsk(req);
newinet->inet_daddr = ireq->ir_rmt_addr;
newinet->inet_rcv_saddr = ireq->ir_loc_addr;
sk_daddr_set(newsk, ireq->ir_rmt_addr);
sk_rcv_saddr_set(newsk, ireq->ir_loc_addr);
newinet->inet_saddr = ireq->ir_loc_addr;
newinet->inet_opt = ireq->opt;
ireq->opt = NULL;

10
net/dccp/ipv6.c
Просмотреть файл

@ -470,11 +470,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
memcpy(newnp, np, sizeof(struct ipv6_pinfo));
ipv6_addr_set_v4mapped(newinet->inet_daddr, &newsk->sk_v6_daddr);
ipv6_addr_set_v4mapped(newinet->inet_saddr, &newnp->saddr);
newsk->sk_v6_rcv_saddr = newnp->saddr;
newnp->saddr = newsk->sk_v6_rcv_saddr;
inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped;
newsk->sk_backlog_rcv = dccp_v4_do_rcv;
@ -917,9 +913,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sk->sk_backlog_rcv = dccp_v6_do_rcv;
goto failure;
}
ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, &sk->sk_v6_rcv_saddr);
np->saddr = sk->sk_v6_rcv_saddr;
return err;
}

11
net/ipv4/inet_hashtables.c
Просмотреть файл

@ -36,9 +36,18 @@ static u32 inet_ehashfn(const struct net *net, const __be32 laddr,
inet_ehash_secret + net_hash_mix(net));
}
/* This function handles inet_sock, but also timewait and request sockets
* for IPv4/IPv6.
*/
u32 sk_ehashfn(const struct sock *sk)
{
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6 &&
!ipv6_addr_v4mapped(&sk->sk_v6_daddr))
return inet6_ehashfn(sock_net(sk),
&sk->sk_v6_rcv_saddr, sk->sk_num,
&sk->sk_v6_daddr, sk->sk_dport);
#endif
return inet_ehashfn(sock_net(sk),
sk->sk_rcv_saddr, sk->sk_num,
sk->sk_daddr, sk->sk_dport);

8
net/ipv4/tcp_ipv4.c
Просмотреть файл

@ -189,7 +189,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (!inet->inet_saddr)
inet->inet_saddr = fl4->saddr;
inet->inet_rcv_saddr = inet->inet_saddr;
sk_rcv_saddr_set(sk, inet->inet_saddr);
if (tp->rx_opt.ts_recent_stamp && inet->inet_daddr != daddr) {
/* Reset inherited state */
@ -204,7 +204,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
tcp_fetch_timewait_stamp(sk, &rt->dst);
inet->inet_dport = usin->sin_port;
inet->inet_daddr = daddr;
sk_daddr_set(sk, daddr);
inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet_opt)
@ -1319,8 +1319,8 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newtp = tcp_sk(newsk);
newinet = inet_sk(newsk);
ireq = inet_rsk(req);
newinet->inet_daddr = ireq->ir_rmt_addr;
newinet->inet_rcv_saddr = ireq->ir_loc_addr;
sk_daddr_set(newsk, ireq->ir_rmt_addr);
sk_rcv_saddr_set(newsk, ireq->ir_loc_addr);
newinet->inet_saddr = ireq->ir_loc_addr;
inet_opt = ireq->opt;
rcu_assign_pointer(newinet->inet_opt, inet_opt);

22
net/ipv6/inet6_hashtables.c
Просмотреть файл

@ -23,11 +23,9 @@
#include <net/secure_seq.h>
#include <net/ip.h>
static u32 inet6_ehashfn(const struct net *net,
const struct in6_addr *laddr,
const u16 lport,
const struct in6_addr *faddr,
const __be16 fport)
u32 inet6_ehashfn(const struct net *net,
const struct in6_addr *laddr, const u16 lport,
const struct in6_addr *faddr, const __be16 fport)
{
static u32 inet6_ehash_secret __read_mostly;
static u32 ipv6_hash_secret __read_mostly;
@ -44,18 +42,6 @@ static u32 inet6_ehashfn(const struct net *net,
inet6_ehash_secret + net_hash_mix(net));
}
static int inet6_sk_ehashfn(const struct sock *sk)
{
const struct inet_sock *inet = inet_sk(sk);
const struct in6_addr *laddr = &sk->sk_v6_rcv_saddr;
const struct in6_addr *faddr = &sk->sk_v6_daddr;
const __u16 lport = inet->inet_num;
const __be16 fport = inet->inet_dport;
struct net *net = sock_net(sk);
return inet6_ehashfn(net, laddr, lport, faddr, fport);
}
int __inet6_hash(struct sock *sk, struct inet_timewait_sock *tw)
{
struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
@ -75,7 +61,7 @@ int __inet6_hash(struct sock *sk, struct inet_timewait_sock *tw)
struct hlist_nulls_head *list;
spinlock_t *lock;
sk->sk_hash = hash = inet6_sk_ehashfn(sk);
sk->sk_hash = hash = sk_ehashfn(sk);
list = &inet_ehash_bucket(hashinfo, hash)->chain;
lock = inet_ehash_lockp(hashinfo, hash);
spin_lock(lock);

11
net/ipv6/tcp_ipv6.c
Просмотреть файл

@ -233,11 +233,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
tp->af_specific = &tcp_sock_ipv6_specific;
#endif
goto failure;
} else {
ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
ipv6_addr_set_v4mapped(inet->inet_rcv_saddr,
&sk->sk_v6_rcv_saddr);
}
np->saddr = sk->sk_v6_rcv_saddr;
return err;
}
@ -1078,11 +1075,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
memcpy(newnp, np, sizeof(struct ipv6_pinfo));
ipv6_addr_set_v4mapped(newinet->inet_daddr, &newsk->sk_v6_daddr);
ipv6_addr_set_v4mapped(newinet->inet_saddr, &newnp->saddr);
newsk->sk_v6_rcv_saddr = newnp->saddr;
newnp->saddr = newsk->sk_v6_rcv_saddr;
inet_csk(newsk)->icsk_af_ops = &ipv6_mapped;
newsk->sk_backlog_rcv = tcp_v4_do_rcv;