centos man page for skb_copy_ubufs

SKB_COPY_UBUFS(9)						 Linux Networking						 SKB_COPY_UBUFS(9)

NAME
       skb_copy_ubufs - copy userspace skb frags buffers to kernel

SYNOPSIS
       int skb_copy_ubufs(struct sk_buff * skb, gfp_t gfp_mask);

ARGUMENTS
       skb
	   the skb to modify

       gfp_mask
	   allocation priority

DESCRIPTION
       This must be called on SKBTX_DEV_ZEROCOPY skb. It will copy all frags into kernel and drop the reference to userspace pages.

       If this function is called from an interrupt gfp_mask must be GFP_ATOMIC.

       Returns 0 on success or a negative error code on failure to allocate kernel memory to copy to.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							 SKB_COPY_UBUFS(9)