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@xxxxxxxxxx>
cc: Ayush Sawal <ayush.sawal@xxxxxxxxxxx>
cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
cc: Eric Dumazet <edumazet@xxxxxxxxxx>
cc: Jakub Kicinski <kuba@xxxxxxxxxx>
cc: Paolo Abeni <pabeni@xxxxxxxxxx>
cc: Jens Axboe <axboe@xxxxxxxxx>
cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
cc: netdev@xxxxxxxxxxxxxxx
---
.../ethernet/chelsio/inline_crypto/chtls/chtls_io.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
index ae6b17b96bf1..1d08386ac916 100644
--- a/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
+++ b/drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
@@ -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);
