From patchwork Tue Dec 18 23:03:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Samuel Thibault X-Patchwork-Id: 10736515 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7C2B26C5 for ; Tue, 18 Dec 2018 23:20:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6B74B2AF59 for ; Tue, 18 Dec 2018 23:20:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5FD362AF68; Tue, 18 Dec 2018 23:20:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E33A22AF59 for ; Tue, 18 Dec 2018 23:20:47 +0000 (UTC) Received: from localhost ([::1]:56729 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZOfP-0004Ab-2r for patchwork-qemu-devel@patchwork.kernel.org; Tue, 18 Dec 2018 18:20:47 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40234) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gZOQI-00082D-Uu for qemu-devel@nongnu.org; Tue, 18 Dec 2018 18:05:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gZOQF-0004GJ-Kr for qemu-devel@nongnu.org; Tue, 18 Dec 2018 18:05:10 -0500 Received: from hera.aquilenet.fr ([185.233.100.1]:41506) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gZOQD-0004A2-9P for qemu-devel@nongnu.org; Tue, 18 Dec 2018 18:05:07 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 2624A2752; Wed, 19 Dec 2018 00:04:58 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at aquilenet.fr Received: from hera.aquilenet.fr ([127.0.0.1]) by localhost (hera.aquilenet.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xIZHI_YqHXui; Wed, 19 Dec 2018 00:04:57 +0100 (CET) Received: from function.home (unknown [IPv6:2a01:cb19:181:c200:9eb6:d0ff:fe88:c3c7]) by hera.aquilenet.fr (Postfix) with ESMTPSA id DB279287A; Wed, 19 Dec 2018 00:04:44 +0100 (CET) Received: from samy by function.home with local (Exim 4.91) (envelope-from ) id 1gZOPr-0007IC-2T; Wed, 19 Dec 2018 00:04:43 +0100 From: Samuel Thibault To: qemu-devel@nongnu.org, peter.maydell@linaro.org Date: Wed, 19 Dec 2018 00:03:56 +0100 Message-Id: <20181218230442.27887-19-samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181218230442.27887-1-samuel.thibault@ens-lyon.org> References: <20181218230442.27887-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 185.233.100.1 Subject: [Qemu-devel] [PULL 18/64] slirp: remove the disabled readv()/writev() code path X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Samuel Thibault , stefanha@redhat.com, jan.kiszka@siemens.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau The soread() function may be used on datagram sockets, and would provide different behaviour if HAVE_READV was set, on empty datagrams. This looks like a minor optimization, that never has been a strong goal for slirp. Signed-off-by: Marc-André Lureau Reviewed-by: Daniel P. Berrangé Signed-off-by: Samuel Thibault --- slirp/slirp_config.h | 3 --- slirp/socket.c | 15 --------------- 2 files changed, 18 deletions(-) diff --git a/slirp/slirp_config.h b/slirp/slirp_config.h index f0cc1c781b..3ce64e088e 100644 --- a/slirp/slirp_config.h +++ b/slirp/slirp_config.h @@ -29,9 +29,6 @@ /* Define if the machine is big endian */ //#undef HOST_WORDS_BIGENDIAN -/* Define if you have readv */ -#undef HAVE_READV - /* Define if iovec needs to be declared */ #undef DECLARE_IOVEC #ifdef _WIN32 diff --git a/slirp/socket.c b/slirp/socket.c index 041ec5061a..7012c7c07d 100644 --- a/slirp/socket.c +++ b/slirp/socket.c @@ -187,12 +187,7 @@ soread(struct socket *so) */ sopreprbuf(so, iov, &n); -#ifdef HAVE_READV - nn = readv(so->s, (struct iovec *)iov, n); - DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); -#else nn = qemu_recv(so->s, iov[0].iov_base, iov[0].iov_len,0); -#endif if (nn <= 0) { if (nn < 0 && (errno == EINTR || errno == EAGAIN)) return 0; @@ -226,7 +221,6 @@ soread(struct socket *so) } } -#ifndef HAVE_READV /* * If there was no error, try and read the second time round * We read again if n = 2 (ie, there's another part of the buffer) @@ -244,7 +238,6 @@ soread(struct socket *so) } DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); -#endif /* Update fields */ sb->sb_cc += nn; @@ -452,13 +445,7 @@ sowrite(struct socket *so) } /* Check if there's urgent data to send, and if so, send it */ -#ifdef HAVE_READV - nn = writev(so->s, (const struct iovec *)iov, n); - - DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); -#else nn = slirp_send(so, iov[0].iov_base, iov[0].iov_len,0); -#endif /* This should never happen, but people tell me it does *shrug* */ if (nn < 0 && (errno == EAGAIN || errno == EINTR)) return 0; @@ -467,7 +454,6 @@ sowrite(struct socket *so) goto err_disconnected; } -#ifndef HAVE_READV if (n == 2 && nn == iov[0].iov_len) { int ret; ret = slirp_send(so, iov[1].iov_base, iov[1].iov_len,0); @@ -475,7 +461,6 @@ sowrite(struct socket *so) nn += ret; } DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); -#endif /* Update sbuf */ sb->sb_cc -= nn;