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| author | Rémi Denis-Courmont <remi.denis-courmont@nokia.com> | 2009-11-09 04:06:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-10 20:54:34 -0800 |
| commit | b1704374fd525e50c44e1a03098728f64231a6f5 (patch) | |
| tree | 7b86c3d2e32cdfd0a0159c2cc2da3f500a182117 | |
| parent | 6b0d07ba152893b40f1014a9db8da5aa564aa00e (diff) | |
| download | linux-b1704374fd525e50c44e1a03098728f64231a6f5.tar.gz linux-b1704374fd525e50c44e1a03098728f64231a6f5.tar.bz2 linux-b1704374fd525e50c44e1a03098728f64231a6f5.zip | |
Phonet: allocate and copy for pipe TX without sock lock
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/phonet/pep.c | 29 |
1 files changed, 12 insertions, 17 deletions
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; } |