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tcp: move qlen/young out of struct listen_sock

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qlen_inc & young_inc were protected by listener lock,
while qlen_dec & young_dec were atomic fields.

Everything needs to be atomic for upcoming lockless listener.

Also move qlen/young in request_sock_queue as we'll get rid
of struct listen_sock eventually.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-10-02 11:43:24 -07:00 • committed by David S. Miller
parent fff1f3001c
commit aac065c50a
4 changed files with 18 additions and 38 deletions
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8
net/core/request_sock.c
View file

@ -102,7 +102,7 @@ void reqsk_queue_destroy(struct request_sock_queue *queue)
/* make all the listen_opt local to us */
struct listen_sock *lopt = reqsk_queue_yank_listen_sk(queue);
if (listen_sock_qlen(lopt) != 0) {
if (reqsk_queue_len(queue) != 0) {
unsigned int i;
for (i = 0; i < lopt->nr_table_entries; i++) {
@ -116,7 +116,7 @@ void reqsk_queue_destroy(struct request_sock_queue *queue)
* or risk a dead lock.
*/
spin_unlock_bh(&queue->syn_wait_lock);
atomic_inc(&lopt->qlen_dec);
atomic_dec(&queue->qlen);
if (del_timer_sync(&req->rsk_timer))
reqsk_put(req);
reqsk_put(req);
@ -126,8 +126,8 @@ void reqsk_queue_destroy(struct request_sock_queue *queue)
}
}
if (WARN_ON(listen_sock_qlen(lopt) != 0))
pr_err("qlen %u\n", listen_sock_qlen(lopt));
if (WARN_ON(reqsk_queue_len(queue) != 0))
pr_err("qlen %u\n", reqsk_queue_len(queue));
kvfree(lopt);
}