From patchwork Wed Mar 29 14:13:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 668320 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BC8DC77B61 for ; Wed, 29 Mar 2023 14:19:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230403AbjC2OT1 (ORCPT ); Wed, 29 Mar 2023 10:19:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55626 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231124AbjC2ORi (ORCPT ); Wed, 29 Mar 2023 10:17:38 -0400 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 79BD54C17 for ; Wed, 29 Mar 2023 07:15:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680099313; 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=mERLnHIZ7Ufhp5QAaSwmDcCxGjZ2CWUtcWDMeYUTupY=; b=XLXJZQic9OZaigTxANcXR1tdw13+VbUo6nYi9bIPF4uOqC9FR4xFUS+HrNK1wGQhB8LDI6 HucU7dpKs9YzLlVofS983SnjGTrx+CG2lTMWl+tsjmruA+6Yl3T07yTBn6ggFehGRzshAx NCmTR4gLLdIfaLBQtWA4pxZ5JKFKhlI= 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-590-z9dsdsf9NKCR0l94rUYaTw-1; Wed, 29 Mar 2023 10:15:08 -0400 X-MC-Unique: z9dsdsf9NKCR0l94rUYaTw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 98FAE885625; Wed, 29 Mar 2023 14:15:07 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 85B182027040; Wed, 29 Mar 2023 14:15:05 +0000 (UTC) From: David Howells To: Matthew Wilcox , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: David Howells , Al Viro , Christoph Hellwig , Jens Axboe , Jeff Layton , Christian Brauner , Chuck Lever III , Linus Torvalds , netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Herbert Xu , linux-crypto@vger.kernel.org Subject: [RFC PATCH v2 25/48] crypto: af_alg: Convert af_alg_sendpage() to use MSG_SPLICE_PAGES Date: Wed, 29 Mar 2023 15:13:31 +0100 Message-Id: <20230329141354.516864-26-dhowells@redhat.com> In-Reply-To: <20230329141354.516864-1-dhowells@redhat.com> References: <20230329141354.516864-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Convert af_alg_sendpage() to use sendmsg() with MSG_SPLICE_PAGES rather than directly splicing in the pages itself. This allows ->sendpage() to be replaced by something that can handle multiple multipage folios in a single transaction. [!] Note that this makes use of netfs_extract_iter_to_sg() from netfslib. This probably needs moving to core code somewhere. Signed-off-by: David Howells cc: Herbert Xu cc: "David S. Miller" cc: Eric Dumazet cc: Jakub Kicinski cc: Paolo Abeni cc: Jens Axboe cc: Matthew Wilcox cc: linux-crypto@vger.kernel.org cc: netdev@vger.kernel.org --- crypto/af_alg.c | 53 +++++++++---------------------------------------- 1 file changed, 9 insertions(+), 44 deletions(-) diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 3088ab298632..7fe8c8db6bb5 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -1118,53 +1118,18 @@ EXPORT_SYMBOL_GPL(af_alg_sendmsg); ssize_t af_alg_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) { - struct sock *sk = sock->sk; - struct alg_sock *ask = alg_sk(sk); - struct af_alg_ctx *ctx = ask->private; - struct af_alg_tsgl *sgl; - int err = -EINVAL; - - if (flags & MSG_SENDPAGE_NOTLAST) - flags |= MSG_MORE; - - lock_sock(sk); - if (!ctx->more && ctx->used) - goto unlock; - - if (!size) - goto done; - - if (!af_alg_writable(sk)) { - err = af_alg_wait_for_wmem(sk, flags); - if (err) - goto unlock; - } - - err = af_alg_alloc_tsgl(sk); - if (err) - goto unlock; - - ctx->merge = 0; - sgl = list_entry(ctx->tsgl_list.prev, struct af_alg_tsgl, list); - - if (sgl->cur) - sg_unmark_end(sgl->sg + sgl->cur - 1); + struct bio_vec bvec; + struct msghdr msg = { + .msg_flags = flags | MSG_SPLICE_PAGES, + }; - sg_mark_end(sgl->sg + sgl->cur); + bvec_set_page(&bvec, page, size, offset); + iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, size); - get_page(page); - sg_set_page(sgl->sg + sgl->cur, page, size, offset); - sgl->cur++; - ctx->used += size; - -done: - ctx->more = flags & MSG_MORE; - -unlock: - af_alg_data_wakeup(sk); - release_sock(sk); + if (flags & MSG_SENDPAGE_NOTLAST) + msg.msg_flags |= MSG_MORE; - return err ?: size; + return sock_sendmsg(sock, &msg); } EXPORT_SYMBOL_GPL(af_alg_sendpage);