Man page 9 : skb_copy_datagram_from_iovec

skb_copy_datagram_from_iovec - Copy a datagram from an iovec.

int skb_copy_datagram_from_iovec(struct sk_buff *  skb , int  offset , const struct iovec *  from , int  from_offset , int  len );

skb
    buffer to copy

offset
    offset in the buffer to start copying to

from
    io vector to copy to

from_offset
    offset in the io vector to start copying from

len
    amount of data to copy to buffer from iovec

Returns 0 or -EFAULT.

the iovec is not modified during the copy.