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inet: includes a sock_common in request_sock

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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>
This commit is contained in:
Eric Dumazet
2013-10-09 15:21:29 -07:00
committed by David S. Miller
parent 8a29111c7c
commit 634fb979e8
19 changed files with 169 additions and 188 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/net/inet_sock.h
+9 -7
View File
@@ -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)
include/net/request_sock.h
+1
View File
@@ -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 */
include/net/tcp.h
+2 -2
View File
@@ -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);