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Commit 1e2e0117 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

inet: add rsk_refcnt/ireq_refcnt to request socks 



When request socks will be in ehash, they'll need to be refcounted.

This patch adds rsk_refcnt/ireq_refcnt macros, and adds
reqsk_put() function, but nothing yet use them.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d34ac51b

include/net/inet_sock.h

+1 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ struct inet_request_sock { 
#define ir_cookie		req.__req_common.skc_cookie

#define ireq_net		req.__req_common.skc_net

#define ireq_state		req.__req_common.skc_state

#define ireq_refcnt		req.__req_common.skc_refcnt



	kmemcheck_bitfield_begin(flags);

	u16			snd_wscale : 4,

include/net/request_sock.h

+8 −0
Original line number Diff line number Diff line
@@ -49,6 +49,8 @@ int inet_rtx_syn_ack(struct sock *parent, struct request_sock *req); 
 */

struct request_sock {

	struct sock_common		__req_common;

#define rsk_refcnt			__req_common.skc_refcnt



	struct request_sock		*dl_next;

	u16				mss;

	u8				num_retrans; /* number of retransmits */
@@ -86,6 +88,12 @@ static inline void reqsk_free(struct request_sock *req) 
	__reqsk_free(req);

}



static inline void reqsk_put(struct request_sock *req)

{

	if (atomic_dec_and_test(&req->rsk_refcnt))

		reqsk_free(req);

}



extern int sysctl_max_syn_backlog;



/** struct listen_sock - listen state