From patchwork Wed May 31 12:45:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13262158 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2E20DC2FD for ; Wed, 31 May 2023 12:46:02 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69817132 for ; Wed, 31 May 2023 05:46:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1685537159; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jiNOYIAVcjsuvSMtZGlGjCJlFKnRRxqCgJAQxTqAqH0=; b=Ssonray9XxJGi49NtGuYeKH7U4FjozggGJbmWq9/ZRziM48WHzS6SxaJQuHT6ppzeTNilC Zq5Ltvyw4CY6g8KZfoq/ejIx/17U677TG2ARaCPhFgtttT0WUimKUG0MbTMtj81ZY+xqA9 ipqVT9iKlGkgcBpkPVsl1kb8AkzclnY= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-198-cKdTb43SN-mmwECm3okGRg-1; Wed, 31 May 2023 08:45:54 -0400 X-MC-Unique: cKdTb43SN-mmwECm3okGRg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3AE7B8032E4; Wed, 31 May 2023 12:45:53 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2F12040C6EC4; Wed, 31 May 2023 12:45:51 +0000 (UTC) From: David Howells To: netdev@vger.kernel.org Cc: David Howells , Chuck Lever , Boris Pismenny , John Fastabend , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Willem de Bruijn , David Ahern , Matthew Wilcox , Jens Axboe , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 6/6] tls/device: Convert tls_device_sendpage() to use MSG_SPLICE_PAGES Date: Wed, 31 May 2023 13:45:28 +0100 Message-ID: <20230531124528.699123-7-dhowells@redhat.com> In-Reply-To: <20230531124528.699123-1-dhowells@redhat.com> References: <20230531124528.699123-1-dhowells@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Convert tls_device_sendpage() to use sendmsg() with MSG_SPLICE_PAGES rather than directly splicing in the pages itself. With that, the tls_iter_offset union is no longer necessary and can be replaced with an iov_iter pointer and the zc_page argument to tls_push_data() can also be removed. This allows ->sendpage() to be replaced by something that can handle multiple multipage folios in a single transaction. Signed-off-by: David Howells cc: Chuck Lever cc: Boris Pismenny cc: John Fastabend cc: Jakub Kicinski cc: Eric Dumazet cc: "David S. Miller" cc: Paolo Abeni cc: Jens Axboe cc: Matthew Wilcox cc: netdev@vger.kernel.org --- net/tls/tls_device.c | 84 +++++++++++--------------------------------- 1 file changed, 20 insertions(+), 64 deletions(-) diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index 221fb30cba51..684171363dd9 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -422,16 +422,10 @@ static int tls_device_copy_data(void *addr, size_t bytes, struct iov_iter *i) return 0; } -union tls_iter_offset { - struct iov_iter *msg_iter; - int offset; -}; - static int tls_push_data(struct sock *sk, - union tls_iter_offset iter_offset, + struct iov_iter *iter, size_t size, int flags, - unsigned char record_type, - struct page *zc_page) + unsigned char record_type) { struct tls_context *tls_ctx = tls_get_ctx(sk); struct tls_prot_info *prot = &tls_ctx->prot_info; @@ -499,22 +493,13 @@ static int tls_push_data(struct sock *sk, record = ctx->open_record; copy = min_t(size_t, size, max_open_record_len - record->len); - if (copy && zc_page) { - struct page_frag zc_pfrag; - - zc_pfrag.page = zc_page; - zc_pfrag.offset = iter_offset.offset; - zc_pfrag.size = copy; - tls_append_frag(record, &zc_pfrag, copy); - - iter_offset.offset += copy; - } else if (copy && (flags & MSG_SPLICE_PAGES)) { + 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); + rc = iov_iter_extract_pages(iter, &pages, + copy, 1, 0, &off); if (rc <= 0) { if (rc == 0) rc = -EIO; @@ -523,7 +508,7 @@ static int tls_push_data(struct sock *sk, copy = rc; if (WARN_ON_ONCE(!sendpage_ok(zc_pfrag.page))) { - iov_iter_revert(iter_offset.msg_iter, copy); + iov_iter_revert(iter, copy); rc = -EIO; goto handle_error; } @@ -536,7 +521,7 @@ static int tls_push_data(struct sock *sk, rc = tls_device_copy_data(page_address(pfrag->page) + pfrag->offset, copy, - iter_offset.msg_iter); + iter); if (rc) goto handle_error; tls_append_frag(record, pfrag, copy); @@ -591,7 +576,6 @@ int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) { unsigned char record_type = TLS_RECORD_TYPE_DATA; struct tls_context *tls_ctx = tls_get_ctx(sk); - union tls_iter_offset iter; int rc; if (!tls_ctx->zerocopy_sendfile) @@ -606,8 +590,8 @@ int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) goto out; } - iter.msg_iter = &msg->msg_iter; - rc = tls_push_data(sk, iter, size, msg->msg_flags, record_type, NULL); + rc = tls_push_data(sk, &msg->msg_iter, size, msg->msg_flags, + record_type); out: release_sock(sk); @@ -618,44 +602,18 @@ int tls_device_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) int tls_device_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags) { - struct tls_context *tls_ctx = tls_get_ctx(sk); - union tls_iter_offset iter_offset; - struct iov_iter msg_iter; - char *kaddr; - struct kvec iov; - int rc; + struct bio_vec bvec; + struct msghdr msg = { .msg_flags = flags | MSG_SPLICE_PAGES, }; if (flags & MSG_SENDPAGE_NOTLAST) - flags |= MSG_MORE; - - mutex_lock(&tls_ctx->tx_lock); - lock_sock(sk); + msg.msg_flags |= MSG_MORE; - if (flags & MSG_OOB) { - rc = -EOPNOTSUPP; - goto out; - } - - if (tls_ctx->zerocopy_sendfile) { - iter_offset.offset = offset; - rc = tls_push_data(sk, iter_offset, size, - flags, TLS_RECORD_TYPE_DATA, page); - goto out; - } - - kaddr = kmap(page); - iov.iov_base = kaddr + offset; - iov.iov_len = size; - iov_iter_kvec(&msg_iter, ITER_SOURCE, &iov, 1, size); - iter_offset.msg_iter = &msg_iter; - rc = tls_push_data(sk, iter_offset, size, flags, TLS_RECORD_TYPE_DATA, - NULL); - kunmap(page); + if (flags & MSG_OOB) + return -EOPNOTSUPP; -out: - release_sock(sk); - mutex_unlock(&tls_ctx->tx_lock); - return rc; + bvec_set_page(&bvec, page, size, offset); + iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); + return tls_device_sendmsg(sk, &msg, size); } struct tls_record_info *tls_get_record(struct tls_offload_context_tx *context, @@ -720,12 +678,10 @@ EXPORT_SYMBOL(tls_get_record); static int tls_device_push_pending_record(struct sock *sk, int flags) { - union tls_iter_offset iter; - struct iov_iter msg_iter; + struct iov_iter iter; - iov_iter_kvec(&msg_iter, ITER_SOURCE, NULL, 0, 0); - iter.msg_iter = &msg_iter; - return tls_push_data(sk, iter, 0, flags, TLS_RECORD_TYPE_DATA, NULL); + iov_iter_kvec(&iter, ITER_SOURCE, NULL, 0, 0); + return tls_push_data(sk, &iter, 0, flags, TLS_RECORD_TYPE_DATA); } void tls_device_write_space(struct sock *sk, struct tls_context *ctx)