From 1e2e01172fd11b4dbfee746c0c8fbcaa9dbf22a0 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 12 Mar 2015 16:44:06 -0700 Subject: [PATCH] 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: Eric Dumazet Signed-off-by: David S. Miller --- include/net/inet_sock.h | 1 + include/net/request_sock.h | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index b31f01de5cd6..9d6470c16a27 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -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, diff --git a/include/net/request_sock.h b/include/net/request_sock.h index 7f830ff67f08..e255ecf8bb40 100644 --- a/include/net/request_sock.h +++ b/include/net/request_sock.h @@ -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 -- 2.20.1