From 9a7030b76ab3c2b23b1629c49b6df33fb5aed305 Mon Sep 17 00:00:00 2001 From: John Dykstra Date: Wed, 19 Aug 2009 09:47:41 +0000 Subject: tcp: Remove redundant copy of MD5 authentication key Remove the copy of the MD5 authentication key from tcp_check_req(). This key has already been copied by tcp_v4_syn_recv_sock() or tcp_v6_syn_recv_sock(). Signed-off-by: John Dykstra Signed-off-by: David S. Miller --- net/ipv4/tcp_minisocks.c | 23 ----------------------- 1 file changed, 23 deletions(-) (limited to 'net/ipv4/tcp_minisocks.c') diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index f8d67ccc64f3..6c8b42299d9f 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -657,29 +657,6 @@ struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb, child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL); if (child == NULL) goto listen_overflow; -#ifdef CONFIG_TCP_MD5SIG - else { - /* Copy over the MD5 key from the original socket */ - struct tcp_md5sig_key *key; - struct tcp_sock *tp = tcp_sk(sk); - key = tp->af_specific->md5_lookup(sk, child); - if (key != NULL) { - /* - * We're using one, so create a matching key on the - * newsk structure. If we fail to get memory then we - * end up not copying the key across. Shucks. - */ - char *newkey = kmemdup(key->key, key->keylen, - GFP_ATOMIC); - if (newkey) { - if (!tcp_alloc_md5sig_pool()) - BUG(); - tp->af_specific->md5_add(child, child, newkey, - key->keylen); - } - } - } -#endif inet_csk_reqsk_queue_unlink(sk, req, prev); inet_csk_reqsk_queue_removed(sk, req); -- cgit v1.2.3 From aa1330766c49199bdab4d4a9096d98b072df9044 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 2 Sep 2009 23:45:45 -0700 Subject: tcp: replace hard coded GFP_KERNEL with sk_allocation This fixed a lockdep warning which appeared when doing stress memory tests over NFS: inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage. page reclaim => nfs_writepage => tcp_sendmsg => lock sk_lock mount_root => nfs_root_data => tcp_close => lock sk_lock => tcp_send_fin => alloc_skb_fclone => page reclaim David raised a concern that if the allocation fails in tcp_send_fin(), and it's GFP_ATOMIC, we are going to yield() (which sleeps) and loop endlessly waiting for the allocation to succeed. But fact is, the original GFP_KERNEL also sleeps. GFP_ATOMIC+yield() looks weird, but it is no worse the implicit sleep inside GFP_KERNEL. Both could loop endlessly under memory pressure. CC: Arnaldo Carvalho de Melo CC: David S. Miller CC: Herbert Xu Signed-off-by: Wu Fengguang Signed-off-by: David S. Miller --- net/ipv4/tcp_minisocks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv4/tcp_minisocks.c') diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index 6c8b42299d9f..e48c37d74d77 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -322,7 +322,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo) if (key != NULL) { memcpy(&tcptw->tw_md5_key, key->key, key->keylen); tcptw->tw_md5_keylen = key->keylen; - if (tcp_alloc_md5sig_pool() == NULL) + if (tcp_alloc_md5sig_pool(sk) == NULL) BUG(); } } while (0); -- cgit v1.2.3