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2023 Feb 16
0
[RFC PATCH v1 05/12] vsock/virtio: non-linear skb support
...io_vsock_skb_reply(skb); >+ sg_init_one(&bufs[0], virtio_vsock_hdr(skb), sizeof(*virtio_vsock_hdr(skb))); >+ sgs[out_sg++] = &bufs[0]; >+ >+ if (skb_is_nonlinear(skb)) { >+ int i; >+ >+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { >+ struct page *data_page = skb_shinfo(skb)->frags[i].bv_page; >+ >+ /* We will use 'page_to_virt()' for userspace page here, >+ * because virtio layer will call 'virt_to_phys()' later >+ * to fill buffer descriptor. We don't touch memory at >+ * "virtual" addr...