zerocopy_sg_from_iter (9) Linux Manual Page
zerocopy_sg_from_iter – Build a zerocopy datagram from an iov_iter
Synopsis
int zerocopy_sg_from_iter(struct sk_buff *skb, struct iov_iter *from);Arguments
skb
-
- buffer to copy
from
- the source to copy from
Description
The function will first copy up to headlen, and then pin the userspace pages and build frags through them.
Returns 0, -EFAULT or -EMSGSIZE.