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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 56dc2fa..723d1cb 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -52,6 +52,7 @@
#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 @@
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 @@
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);
}
