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new helper: skb_copy_and_csum_datagram_msg()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-04-06 18:47:38 -04:00
parent c33d23c215
commit 227158db16
4 changed files with 9 additions and 5 deletions
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5
include/linux/skbuff.h
View file

@ -2651,6 +2651,11 @@ static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset,
}
int skb_copy_and_csum_datagram_iovec(struct sk_buff *skb, int hlen,
struct iovec *iov);
static inline int skb_copy_and_csum_datagram_msg(struct sk_buff *skb, int hlen,
struct msghdr *msg)
{
return skb_copy_and_csum_datagram_iovec(skb, hlen, msg->msg_iov);
}
int skb_copy_datagram_from_iovec(struct sk_buff *skb, int offset,
const struct iovec *from, int from_offset,
int len);

5
net/ipv4/udp.c
View file

@ -1284,9 +1284,8 @@ int udp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
err = skb_copy_datagram_msg(skb, sizeof(struct udphdr),
msg, copied);
else {
err = skb_copy_and_csum_datagram_iovec(skb,
sizeof(struct udphdr),
msg->msg_iov);
err = skb_copy_and_csum_datagram_msg(skb, sizeof(struct udphdr),
msg);
if (err == -EINVAL)
goto csum_copy_err;

2
net/ipv6/raw.c
View file

@ -492,7 +492,7 @@ static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
goto csum_copy_err;
err = skb_copy_datagram_msg(skb, 0, msg, copied);
} else {
err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
if (err == -EINVAL)
goto csum_copy_err;
}

2
net/ipv6/udp.c
View file

@ -428,7 +428,7 @@ int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk,
err = skb_copy_datagram_msg(skb, sizeof(struct udphdr),
msg, copied);
else {
err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov);
err = skb_copy_and_csum_datagram_msg(skb, sizeof(struct udphdr), msg);
if (err == -EINVAL)
goto csum_copy_err;
}