skb_copy_ubufs — copy userspace skb frags buffers to kernel
int skb_copy_ubufs ( | struct sk_buff * skb, |
gfp_t gfp_mask); |
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.