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authorMichael S. Tsirkin <mst@redhat.com>2009-04-20 01:25:46 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-21 05:42:44 -0700
commit0a1ec07a67bd8b0033dace237249654d015efa21 (patch)
tree1963b9ba273f0786c8a972c27b5599dfb4a19f06 /include
parent0cededf3ffbb775c3716aa1d246338fdc24b1259 (diff)
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net: skb_copy_datagram_const_iovec()
There's an skb_copy_datagram_iovec() to copy out of a paged skb, but it modifies the iovec, and does not support starting at an offset in the destination. We want both in tun.c, so let's add the function. It's a carbon copy of skb_copy_datagram_iovec() with enough changes to be annoying. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/skbuff.h5
-rw-r--r--include/linux/socket.h2
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 5fd389162f0..af2b21bdda8 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1717,6 +1717,11 @@ extern int skb_copy_datagram_from_iovec(struct sk_buff *skb,
int offset,
struct iovec *from,
int len);
+extern int skb_copy_datagram_const_iovec(const struct sk_buff *from,
+ int offset,
+ const struct iovec *to,
+ int to_offset,
+ int size);
extern void skb_free_datagram(struct sock *sk, struct sk_buff *skb);
extern int skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
unsigned int flags);
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 421afb4d29b..171b08db9c4 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -318,6 +318,8 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode);
extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
+extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
+ int offset, int len);
extern int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, int __user *ulen);
extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);
extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);