diff options
| -rw-r--r-- | net/decnet/af_decnet.c | 40 | ||||
| -rw-r--r-- | net/decnet/dn_nsp_out.c | 63 |
2 files changed, 33 insertions, 70 deletions
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c index 621680f..348f36b 100644 --- a/net/decnet/af_decnet.c +++ b/net/decnet/af_decnet.c @@ -1876,8 +1876,27 @@ static inline unsigned int dn_current_mss(struct sock *sk, int flags) return mss_now; } +/* + * N.B. We get the timeout wrong here, but then we always did get it + * wrong before and this is another step along the road to correcting + * it. It ought to get updated each time we pass through the routine, + * but in practise it probably doesn't matter too much for now. + */ +static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk, + unsigned long datalen, int noblock, + int *errcode) +{ + struct sk_buff *skb = sock_alloc_send_skb(sk, datalen, + noblock, errcode); + if (skb) { + skb->protocol = __constant_htons(ETH_P_DNA_RT); + skb->pkt_type = PACKET_OUTGOING; + } + return skb; +} + static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t size) + struct msghdr *msg, size_t size) { struct sock *sk = sock->sk; struct dn_scp *scp = DN_SK(sk); @@ -1892,7 +1911,7 @@ static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, struct dn_skb_cb *cb; size_t len; unsigned char fctype; - long timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); + long timeo; if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) return -EOPNOTSUPP; @@ -1900,18 +1919,21 @@ static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) return -EINVAL; + lock_sock(sk); + timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); /* * The only difference between stream sockets and sequenced packet * sockets is that the stream sockets always behave as if MSG_EOR * has been set. */ if (sock->type == SOCK_STREAM) { - if (flags & MSG_EOR) - return -EINVAL; + if (flags & MSG_EOR) { + err = -EINVAL; + goto out; + } flags |= MSG_EOR; } - lock_sock(sk); err = dn_check_state(sk, addr, addr_len, &timeo, flags); if (err) @@ -1980,8 +2002,12 @@ static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, /* * Get a suitably sized skb. + * 64 is a bit of a hack really, but its larger than any + * link-layer headers and has served us well as a good + * guess as to their real length. */ - skb = dn_alloc_send_skb(sk, &len, flags & MSG_DONTWAIT, timeo, &err); + skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER, + flags & MSG_DONTWAIT, &err); if (err) break; @@ -1991,7 +2017,7 @@ static int dn_sendmsg(struct kiocb *iocb, struct socket *sock, cb = DN_SKB_CB(skb); - skb_reserve(skb, DN_MAX_NSP_DATA_HEADER); + skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER); if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { err = -EFAULT; diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c index e0bebf4..53633d3 100644 --- a/net/decnet/dn_nsp_out.c +++ b/net/decnet/dn_nsp_out.c @@ -137,69 +137,6 @@ struct sk_buff *dn_alloc_skb(struct sock *sk, int size, int pri) } /* - * Wrapper for the above, for allocs of data skbs. We try and get the - * whole size thats been asked for (plus 11 bytes of header). If this - * fails, then we try for any size over 16 bytes for SOCK_STREAMS. - */ -struct sk_buff *dn_alloc_send_skb(struct sock *sk, size_t *size, int noblock, long timeo, int *err) -{ - int space; - int len; - struct sk_buff *skb = NULL; - - *err = 0; - - while(skb == NULL) { - if (signal_pending(current)) { - *err = sock_intr_errno(timeo); - break; - } - - if (sk->sk_shutdown & SEND_SHUTDOWN) { - *err = EINVAL; - break; - } - - if (sk->sk_err) - break; - - len = *size + 11; - space = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); - - if (space < len) { - if ((sk->sk_socket->type == SOCK_STREAM) && - (space >= (16 + 11))) - len = space; - } - - if (space < len) { - set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); - if (noblock) { - *err = EWOULDBLOCK; - break; - } - - clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); - SOCK_SLEEP_PRE(sk) - - if ((sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc)) < - len) - schedule(); - - SOCK_SLEEP_POST(sk) - continue; - } - - if ((skb = dn_alloc_skb(sk, len, sk->sk_allocation)) == NULL) - continue; - - *size = len - 11; - } - - return skb; -} - -/* * Calculate persist timer based upon the smoothed round * trip time and the variance. Backoff according to the * nsp_backoff[] array. |
