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authorEric Dumazet <edumazet@google.com>2015-03-18 04:32:28 +0300
committerDavid S. Miller <davem@davemloft.net>2015-03-18 05:01:56 +0300
commit4e9a578e5b6bdfa8b7fed7a41f28a86a7cffc85f (patch)
tree2aa5dfb5e6885aaa15b6802ec6bffba15f4099f4 /include/net/request_sock.h
parente49bb337d77d54afebe4fe5b9008955e1337f83d (diff)
downloadlinux-4e9a578e5b6bdfa8b7fed7a41f28a86a7cffc85f.tar.xz
inet: add rsk_listener field to struct request_sock
Once we'll be able to lookup request sockets in ehash table, we'll need to get access to listener which created this request. This avoid doing a lookup to find the listener, which benefits for a more solid SO_REUSEPORT, and is needed once we no longer queue request sock into a listener private queue. Note that 'struct tcp_request_sock'->listener could be reduced to a single bit, as TFO listener should match req->rsk_listener. TFO will no longer need to hold a reference on the listener. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/request_sock.h')
-rw-r--r--include/net/request_sock.h12
1 files changed, 9 insertions, 3 deletions
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 56dc2faba47e..723d1cbdf20e 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -52,6 +52,7 @@ struct request_sock {
#define rsk_refcnt __req_common.skc_refcnt
struct request_sock *dl_next;
+ struct sock *rsk_listener;
u16 mss;
u8 num_retrans; /* number of retransmits */
u8 cookie_ts:1; /* syncookie: encode tcpopts in timestamp */
@@ -67,13 +68,16 @@ struct request_sock {
u32 peer_secid;
};
-static inline struct request_sock *reqsk_alloc(const struct request_sock_ops *ops)
+static inline struct request_sock *
+reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener)
{
struct request_sock *req = kmem_cache_alloc(ops->slab, GFP_ATOMIC);
- if (req != NULL)
+ if (req) {
req->rsk_ops = ops;
-
+ sock_hold(sk_listener);
+ req->rsk_listener = sk_listener;
+ }
return req;
}
@@ -88,6 +92,8 @@ static inline void reqsk_free(struct request_sock *req)
WARN_ON_ONCE(atomic_read(&req->rsk_refcnt) != 0);
req->rsk_ops->destructor(req);
+ if (req->rsk_listener)
+ sock_put(req->rsk_listener);
kmem_cache_free(req->rsk_ops->slab, req);
}