Commit 21226abb authored by Al Viro's avatar Al Viro
Browse files

net: switch memcpy_fromiovec()/memcpy_fromiovecend() users to copy_from_iter() 



That takes care of the majority of ->sendmsg() instances - most of them
via memcpy_to_msg() or assorted getfrag() callbacks.  One place where we
still keep memcpy_fromiovecend() is tipc - there we potentially read the
same data over and over; separate patch, that...

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 57be5bda

include/linux/skbuff.h

+1 −2
Original line number Diff line number Diff line
@@ -2692,8 +2692,7 @@ int skb_vlan_push(struct sk_buff *skb, __be16 vlan_proto, u16 vlan_tci); 


static inline int memcpy_from_msg(void *data, struct msghdr *msg, int len)

{

	/* XXX: stripping const */

	return memcpy_fromiovec(data, (struct iovec *)msg->msg_iter.iov, len);

	return copy_from_iter(data, len, &msg->msg_iter) == len ? 0 : -EFAULT;

}



static inline int memcpy_to_msg(struct msghdr *msg, void *data, int len)

include/net/udplite.h

+1 −2
Original line number Diff line number Diff line
@@ -20,8 +20,7 @@ static __inline__ int udplite_getfrag(void *from, char *to, int offset, 
				      int len, int odd, struct sk_buff *skb)

{

	struct msghdr *msg = from;

	/* XXX: stripping const */

	return memcpy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len);

	return copy_from_iter(to, len, &msg->msg_iter) != len ? -EFAULT : 0;

}



/* Designate sk as UDP-Lite socket */

net/ipv4/ip_output.c

+2 −4
Original line number Diff line number Diff line
@@ -755,13 +755,11 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk 
	struct msghdr *msg = from;



	if (skb->ip_summed == CHECKSUM_PARTIAL) {

		/* XXX: stripping const */

		if (memcpy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len) < 0)

		if (copy_from_iter(to, len, &msg->msg_iter) != len)

			return -EFAULT;

	} else {

		__wsum csum = 0;

		/* XXX: stripping const */

		if (csum_partial_copy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len, &csum) < 0)

		if (csum_and_copy_from_iter(to, len, &csum, &msg->msg_iter) != len)

			return -EFAULT;

		skb->csum = csum_block_add(skb->csum, csum, odd);

	}

net/ipv4/ping.c

+7 −7
Original line number Diff line number Diff line
@@ -599,18 +599,18 @@ int ping_getfrag(void *from, char *to, 
	struct pingfakehdr *pfh = (struct pingfakehdr *)from;



	if (offset == 0) {

		if (fraglen < sizeof(struct icmphdr))

		fraglen -= sizeof(struct icmphdr);

		if (fraglen < 0)

			BUG();

		if (csum_partial_copy_fromiovecend(to + sizeof(struct icmphdr),

			    pfh->msg->msg_iter.iov, 0, fraglen - sizeof(struct icmphdr),

			    &pfh->wcheck))

		if (csum_and_copy_from_iter(to + sizeof(struct icmphdr),

			    fraglen, &pfh->wcheck,

			    &pfh->msg->msg_iter) != fraglen)

			return -EFAULT;

	} else if (offset < sizeof(struct icmphdr)) {

			BUG();

	} else {

		if (csum_partial_copy_fromiovecend

				(to, pfh->msg->msg_iter.iov, offset - sizeof(struct icmphdr),

				 fraglen, &pfh->wcheck))

		if (csum_and_copy_from_iter(to, fraglen, &pfh->wcheck,

					    &pfh->msg->msg_iter) != fraglen)

			return -EFAULT;

	}

net/ipv4/raw.c

+1 −1
Original line number Diff line number Diff line
@@ -382,7 +382,7 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, 


	skb->transport_header = skb->network_header;

	err = -EFAULT;

	if (memcpy_fromiovecend((void *)iph, msg->msg_iter.iov, 0, length))

	if (memcpy_from_msg(iph, msg, length))

		goto error_free;



	iphlen = iph->ihl * 4;

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