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authorEric Dumazet <edumazet@google.com>2013-10-09 15:21:29 -0700
committerDavid S. Miller <davem@davemloft.net>2013-10-10 00:08:07 -0400
commit634fb979e8f3a70f04c1f2f519d0cd1142eb5c1a (patch)
treeffd7f7ef4a313c94859180d1bc20f2713a11f987 /include
parent8a29111c7ca68d928dfab58636f3f6acf0ac04f7 (diff)
inet: includes a sock_common in request_sock
TCP listener refactoring, part 5 : We want to be able to insert request sockets (SYN_RECV) into main ehash table instead of the per listener hash table to allow RCU lookups and remove listener lock contention. This patch includes the needed struct sock_common in front of struct request_sock This means there is no more inet6_request_sock IPv6 specific structure. Following inet_request_sock fields were renamed as they became macros to reference fields from struct sock_common. Prefix ir_ was chosen to avoid name collisions. loc_port -> ir_loc_port loc_addr -> ir_loc_addr rmt_addr -> ir_rmt_addr rmt_port -> ir_rmt_port iif -> ir_iif Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ipv6.h26
-rw-r--r--include/net/inet_sock.h16
-rw-r--r--include/net/request_sock.h1
-rw-r--r--include/net/tcp.h4
4 files changed, 14 insertions, 33 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 35f6c1b562c4..a80a63cfb70c 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -115,16 +115,8 @@ static inline int inet6_iif(const struct sk_buff *skb)
return IP6CB(skb)->iif;
}
-struct inet6_request_sock {
- struct in6_addr loc_addr;
- struct in6_addr rmt_addr;
- struct sk_buff *pktopts;
- int iif;
-};
-
struct tcp6_request_sock {
struct tcp_request_sock tcp6rsk_tcp;
- struct inet6_request_sock tcp6rsk_inet6;
};
struct ipv6_mc_socklist;
@@ -264,26 +256,12 @@ static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
return inet_sk(__sk)->pinet6;
}
-static inline struct inet6_request_sock *
- inet6_rsk(const struct request_sock *rsk)
-{
- return (struct inet6_request_sock *)(((u8 *)rsk) +
- inet_rsk(rsk)->inet6_rsk_offset);
-}
-
-static inline u32 inet6_rsk_offset(struct request_sock *rsk)
-{
- return rsk->rsk_ops->obj_size - sizeof(struct inet6_request_sock);
-}
-
static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *ops)
{
struct request_sock *req = reqsk_alloc(ops);
- if (req != NULL) {
- inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
- inet6_rsk(req)->pktopts = NULL;
- }
+ if (req)
+ inet_rsk(req)->pktopts = NULL;
return req;
}
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 6d9a7e6eb5a4..f91204442efa 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -70,13 +70,14 @@ struct ip_options_data {
struct inet_request_sock {
struct request_sock req;
-#if IS_ENABLED(CONFIG_IPV6)
- u16 inet6_rsk_offset;
-#endif
- __be16 loc_port;
- __be32 loc_addr;
- __be32 rmt_addr;
- __be16 rmt_port;
+#define ir_loc_addr req.__req_common.skc_rcv_saddr
+#define ir_rmt_addr req.__req_common.skc_daddr
+#define ir_loc_port req.__req_common.skc_num
+#define ir_rmt_port req.__req_common.skc_dport
+#define ir_v6_rmt_addr req.__req_common.skc_v6_daddr
+#define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr
+#define ir_iif req.__req_common.skc_bound_dev_if
+
kmemcheck_bitfield_begin(flags);
u16 snd_wscale : 4,
rcv_wscale : 4,
@@ -88,6 +89,7 @@ struct inet_request_sock {
no_srccheck: 1;
kmemcheck_bitfield_end(flags);
struct ip_options_rcu *opt;
+ struct sk_buff *pktopts;
};
static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 65c3e5164a5c..7f830ff67f08 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -48,6 +48,7 @@ int inet_rtx_syn_ack(struct sock *parent, struct request_sock *req);
/* struct request_sock - mini sock to represent a connection request
*/
struct request_sock {
+ struct sock_common __req_common;
struct request_sock *dl_next;
u16 mss;
u8 num_retrans; /* number of retransmits */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 39bbfa1602b2..24a06161d174 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1109,8 +1109,8 @@ static inline void tcp_openreq_init(struct request_sock *req,
ireq->wscale_ok = rx_opt->wscale_ok;
ireq->acked = 0;
ireq->ecn_ok = 0;
- ireq->rmt_port = tcp_hdr(skb)->source;
- ireq->loc_port = tcp_hdr(skb)->dest;
+ ireq->ir_rmt_port = tcp_hdr(skb)->source;
+ ireq->ir_loc_port = tcp_hdr(skb)->dest;
}
void tcp_enter_memory_pressure(struct sock *sk);