[NET] Generalise tcp_listen_opt
This chunks out the accept_queue and tcp_listen_opt code and moves
them to net/core/request_sock.c and include/net/request_sock.h, to
make it useful for other transport protocols, DCCP being the first one
to use it.
Next patches will rename tcp_listen_opt to accept_sock and remove the
inline tcp functions that just call a reqsk_queue_ function.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6663086..a2e323c 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1686,71 +1686,41 @@
static inline void tcp_acceptq_queue(struct sock *sk, struct request_sock *req,
struct sock *child)
{
- struct tcp_sock *tp = tcp_sk(sk);
-
- req->sk = child;
- sk_acceptq_added(sk);
-
- if (!tp->accept_queue_tail) {
- tp->accept_queue = req;
- } else {
- tp->accept_queue_tail->dl_next = req;
- }
- tp->accept_queue_tail = req;
- req->dl_next = NULL;
+ reqsk_queue_add(&tcp_sk(sk)->accept_queue, req, sk, child);
}
-struct tcp_listen_opt
-{
- u8 max_qlen_log; /* log_2 of maximal queued SYNs */
- int qlen;
- int qlen_young;
- int clock_hand;
- u32 hash_rnd;
- struct request_sock *syn_table[TCP_SYNQ_HSIZE];
-};
-
static inline void
tcp_synq_removed(struct sock *sk, struct request_sock *req)
{
- struct tcp_listen_opt *lopt = tcp_sk(sk)->listen_opt;
-
- if (--lopt->qlen == 0)
+ if (reqsk_queue_removed(&tcp_sk(sk)->accept_queue, req) == 0)
tcp_delete_keepalive_timer(sk);
- if (req->retrans == 0)
- lopt->qlen_young--;
}
static inline void tcp_synq_added(struct sock *sk)
{
- struct tcp_listen_opt *lopt = tcp_sk(sk)->listen_opt;
-
- if (lopt->qlen++ == 0)
+ if (reqsk_queue_added(&tcp_sk(sk)->accept_queue) == 0)
tcp_reset_keepalive_timer(sk, TCP_TIMEOUT_INIT);
- lopt->qlen_young++;
}
static inline int tcp_synq_len(struct sock *sk)
{
- return tcp_sk(sk)->listen_opt->qlen;
+ return reqsk_queue_len(&tcp_sk(sk)->accept_queue);
}
static inline int tcp_synq_young(struct sock *sk)
{
- return tcp_sk(sk)->listen_opt->qlen_young;
+ return reqsk_queue_len_young(&tcp_sk(sk)->accept_queue);
}
static inline int tcp_synq_is_full(struct sock *sk)
{
- return tcp_synq_len(sk) >> tcp_sk(sk)->listen_opt->max_qlen_log;
+ return reqsk_queue_is_full(&tcp_sk(sk)->accept_queue);
}
static inline void tcp_synq_unlink(struct tcp_sock *tp, struct request_sock *req,
- struct request_sock **prev)
+ struct request_sock **prev)
{
- write_lock(&tp->syn_wait_lock);
- *prev = req->dl_next;
- write_unlock(&tp->syn_wait_lock);
+ reqsk_queue_unlink(&tp->accept_queue, req, prev);
}
static inline void tcp_synq_drop(struct sock *sk, struct request_sock *req,