From b1704374fd525e50c44e1a03098728f64231a6f5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= Date: Mon, 9 Nov 2009 04:06:40 +0000 Subject: Phonet: allocate and copy for pipe TX without sock lock MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Rémi Denis-Courmont Signed-off-by: David S. Miller --- net/phonet/pep.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) (limited to 'net/phonet') diff --git a/net/phonet/pep.c b/net/phonet/pep.c index cbaa1d67d77b..bdc17bdad366 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -843,7 +843,7 @@ static int pep_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t len) { struct pep_sock *pn = pep_sk(sk); - struct sk_buff *skb = NULL; + struct sk_buff *skb; long timeo; int flags = msg->msg_flags; int err, done; @@ -851,6 +851,16 @@ static int pep_sendmsg(struct kiocb *iocb, struct sock *sk, if (msg->msg_flags & MSG_OOB || !(msg->msg_flags & MSG_EOR)) return -EOPNOTSUPP; + skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len, + flags & MSG_DONTWAIT, &err); + if (!skb) + return -ENOBUFS; + + skb_reserve(skb, MAX_PHONET_HEADER + 3); + err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); + if (err < 0) + goto outfree; + lock_sock(sk); timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); if ((1 << sk->sk_state) & (TCPF_LISTEN|TCPF_CLOSE)) { @@ -894,28 +904,13 @@ disabled: goto disabled; } - if (!skb) { - skb = sock_alloc_send_skb(sk, MAX_PNPIPE_HEADER + len, - flags & MSG_DONTWAIT, &err); - if (skb == NULL) - goto out; - skb_reserve(skb, MAX_PHONET_HEADER + 3); - - if (sk->sk_state != TCP_ESTABLISHED || - !atomic_read(&pn->tx_credits)) - goto disabled; /* sock_alloc_send_skb might sleep */ - } - - err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); - if (err < 0) - goto out; - err = pipe_skb_send(sk, skb); if (err >= 0) err = len; /* success! */ skb = NULL; out: release_sock(sk); +outfree: kfree_skb(skb); return err; } -- cgit v1.2.3