inet: drop prev pointer handling in request sock
When request sock are put in ehash table, the whole notion
of having a previous request to update dl_next is pointless.
Also, following patch will get rid of big purge timer,
so we want to delete a request sock without holding listener lock.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index e7ad291..5bffbba 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -288,11 +288,11 @@
}
switch (sk->sk_state) {
- struct request_sock *req , **prev;
+ struct request_sock *req;
case DCCP_LISTEN:
if (sock_owned_by_user(sk))
goto out;
- req = inet_csk_search_req(sk, &prev, dh->dccph_dport,
+ req = inet_csk_search_req(sk, dh->dccph_dport,
iph->daddr, iph->saddr);
if (!req)
goto out;
@@ -314,7 +314,7 @@
* created socket, and POSIX does not want network
* errors returned from accept().
*/
- inet_csk_reqsk_queue_drop(sk, req, prev);
+ inet_csk_reqsk_queue_drop(sk, req);
goto out;
case DCCP_REQUESTING:
@@ -448,13 +448,11 @@
const struct dccp_hdr *dh = dccp_hdr(skb);
const struct iphdr *iph = ip_hdr(skb);
struct sock *nsk;
- struct request_sock **prev;
/* Find possible connection requests. */
- struct request_sock *req = inet_csk_search_req(sk, &prev,
- dh->dccph_sport,
+ struct request_sock *req = inet_csk_search_req(sk, dh->dccph_sport,
iph->saddr, iph->daddr);
- if (req != NULL)
- return dccp_check_req(sk, skb, req, prev);
+ if (req)
+ return dccp_check_req(sk, skb, req);
nsk = inet_lookup_established(sock_net(sk), &dccp_hashinfo,
iph->saddr, dh->dccph_sport,