Commit 116f7b36 authored May 31, 2023 by David Howells Committed by Paolo Abeni Jun 01, 2023

chelsio: Support MSG_SPLICE_PAGES



Make Chelsio's TLS offload sendmsg() support MSG_SPLICE_PAGES, splicing in
pages from the source iterator if possible and copying the data in
otherwise.

This allows ->sendpage() to be replaced by something that can handle
multiple multipage folios in a single transaction.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Ayush Sawal <ayush.sawal@chelsio.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: netdev@vger.kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

parent 735c9ee9

drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -1092,7 +1092,17 @@ int chtls_sendmsg(struct sock sk, struct msghdr msg, size_t size)
		if (copy > size)
		copy = size;

		if (skb_tailroom(skb) > 0) {
		if (msg->msg_flags & MSG_SPLICE_PAGES) {
		err = skb_splice_from_iter(skb, &msg->msg_iter, copy,
		sk->sk_allocation);
		if (err < 0) {
		if (err == -EMSGSIZE)
		goto new_buf;
		goto do_fault;
		}
		copy = err;
		sk_wmem_queued_add(sk, copy);
		} else if (skb_tailroom(skb) > 0) {
		copy = min(copy, skb_tailroom(skb));
		if (is_tls_tx(csk))
		copy = min_t(int, copy, csk->tlshws.txleft);