From: David Howells <dhowells@redhat.com>
To: netdev@vger.kernel.org
Cc: David Howells <dhowells@redhat.com>,
Chuck Lever <chuck.lever@oracle.com>,
Boris Pismenny <borisp@nvidia.com>,
John Fastabend <john.fastabend@gmail.com>,
Jakub Kicinski <kuba@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>,
Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
David Ahern <dsahern@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH net-next v2 5/6] tls/device: Support MSG_SPLICE_PAGES
Date: Wed, 31 May 2023 13:45:27 +0100 [thread overview]
Message-ID: <20230531124528.699123-6-dhowells@redhat.com> (raw)
In-Reply-To: <20230531124528.699123-1-dhowells@redhat.com>
Make TLS's device sendmsg() support MSG_SPLICE_PAGES. This causes pages to
be spliced from the source iterator if possible.
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: Chuck Lever <chuck.lever@oracle.com>
cc: Boris Pismenny <borisp@nvidia.com>
cc: John Fastabend <john.fastabend@gmail.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Eric Dumazet <edumazet@google.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: netdev@vger.kernel.org
---
net/tls/tls_device.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index a959572a816f..221fb30cba51 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -508,6 +508,29 @@ static int tls_push_data(struct sock *sk,
tls_append_frag(record, &zc_pfrag, copy);
iter_offset.offset += copy;
+ } else if (copy && (flags & MSG_SPLICE_PAGES)) {
+ struct page_frag zc_pfrag;
+ struct page **pages = &zc_pfrag.page;
+ size_t off;
+
+ rc = iov_iter_extract_pages(iter_offset.msg_iter,
+ &pages, copy, 1, 0, &off);
+ if (rc <= 0) {
+ if (rc == 0)
+ rc = -EIO;
+ goto handle_error;
+ }
+ copy = rc;
+
+ if (WARN_ON_ONCE(!sendpage_ok(zc_pfrag.page))) {
+ iov_iter_revert(iter_offset.msg_iter, copy);
+ rc = -EIO;
+ goto handle_error;
+ }
+
+ zc_pfrag.offset = off;
+ zc_pfrag.size = copy;
+ tls_append_frag(record, &zc_pfrag, copy);
} else if (copy) {
copy = min_t(size_t, copy, pfrag->size - pfrag->offset);
@@ -571,6 +594,9 @@ int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
union tls_iter_offset iter;
int rc;
+ if (!tls_ctx->zerocopy_sendfile)
+ msg->msg_flags &= ~MSG_SPLICE_PAGES;
+
mutex_lock(&tls_ctx->tx_lock);
lock_sock(sk);
next prev parent reply other threads:[~2023-05-31 12:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 12:45 [PATCH net-next v2 0/6] splice, net: Handle MSG_SPLICE_PAGES in AF_TLS David Howells
2023-05-31 12:45 ` [PATCH net-next v2 1/6] splice, net: Fix MSG_MORE signalling in splice_direct_to_actor() David Howells
2023-05-31 12:45 ` [PATCH net-next v2 2/6] net: Block MSG_SENDPAGE_* from being passed to sendmsg() by userspace David Howells
2023-05-31 17:02 ` Simon Horman
2023-05-31 12:45 ` [PATCH net-next v2 3/6] tls/sw: Support MSG_SPLICE_PAGES David Howells
2023-05-31 12:45 ` [PATCH net-next v2 4/6] tls/sw: Convert tls_sw_sendpage() to use MSG_SPLICE_PAGES David Howells
2023-05-31 12:45 ` David Howells [this message]
2023-05-31 12:45 ` [PATCH net-next v2 6/6] tls/device: Convert tls_device_sendpage() " David Howells
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