From nobody Tue Feb 10 09:58:34 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1547425289971124.29475881651467; Sun, 13 Jan 2019 16:21:29 -0800 (PST) Received: from localhost ([127.0.0.1]:41418 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1giq0P-0006ly-07 for importer@patchew.org; Sun, 13 Jan 2019 19:21:29 -0500 Received: from eggs.gnu.org ([209.51.188.92]:51233) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gipk6-0002yV-VZ for qemu-devel@nongnu.org; Sun, 13 Jan 2019 19:04:41 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gipk4-0006PR-37 for qemu-devel@nongnu.org; Sun, 13 Jan 2019 19:04:38 -0500 Received: from hera.aquilenet.fr ([2a0c:e300::1]:57278) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gipk3-0006LL-GZ for qemu-devel@nongnu.org; Sun, 13 Jan 2019 19:04:35 -0500 Received: from localhost (localhost [127.0.0.1]) by hera.aquilenet.fr (Postfix) with ESMTP id 1B4E31B9B; Mon, 14 Jan 2019 01:04:22 +0100 (CET) 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 Tf5ywttFFcIe; Mon, 14 Jan 2019 01:04:21 +0100 (CET) Received: from function.home (lfbn-1-11161-124.w86-213.abo.wanadoo.fr [86.213.235.124]) by hera.aquilenet.fr (Postfix) with ESMTPSA id 46C141B9F; Mon, 14 Jan 2019 01:04:08 +0100 (CET) Received: from samy by function.home with local (Exim 4.92-RC4) (envelope-from ) id 1gipjZ-0007nj-AQ; Mon, 14 Jan 2019 01:04:05 +0100 X-Virus-Scanned: Debian amavisd-new at aquilenet.fr From: Samuel Thibault To: qemu-devel@nongnu.org Date: Mon, 14 Jan 2019 01:02:39 +0100 Message-Id: <20190114000326.29847-19-samuel.thibault@ens-lyon.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190114000326.29847-1-samuel.thibault@ens-lyon.org> References: <20190114000326.29847-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a0c:e300::1 Subject: [Qemu-devel] [PULL 18/65] 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=20Lureau?= , Samuel Thibault , stefanha@redhat.com, jan.kiszka@siemens.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Marc-Andr=C3=A9 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-Andr=C3=A9 Lureau Reviewed-by: Daniel P. Berrang=C3=A9 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 =20 -/* 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); =20 -#ifdef HAVE_READV - nn =3D readv(so->s, (struct iovec *)iov, n); - DEBUG_MISC((dfd, " ... read nn =3D %d bytes\n", nn)); -#else nn =3D qemu_recv(so->s, iov[0].iov_base, iov[0].iov_len,0); -#endif if (nn <=3D 0) { if (nn < 0 && (errno =3D=3D EINTR || errno =3D=3D EAGAIN)) return 0; @@ -226,7 +221,6 @@ soread(struct socket *so) } } =20 -#ifndef HAVE_READV /* * If there was no error, try and read the second time round * We read again if n =3D 2 (ie, there's another part of the buffer) @@ -244,7 +238,6 @@ soread(struct socket *so) } =20 DEBUG_MISC((dfd, " ... read nn =3D %d bytes\n", nn)); -#endif =20 /* Update fields */ sb->sb_cc +=3D nn; @@ -452,13 +445,7 @@ sowrite(struct socket *so) } /* Check if there's urgent data to send, and if so, send it */ =20 -#ifdef HAVE_READV - nn =3D writev(so->s, (const struct iovec *)iov, n); - - DEBUG_MISC((dfd, " ... wrote nn =3D %d bytes\n", nn)); -#else nn =3D 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 =3D=3D EAGAIN || errno =3D=3D EINTR)) return 0; @@ -467,7 +454,6 @@ sowrite(struct socket *so) goto err_disconnected; } =20 -#ifndef HAVE_READV if (n =3D=3D 2 && nn =3D=3D iov[0].iov_len) { int ret; ret =3D slirp_send(so, iov[1].iov_base, iov[1].iov_len,0); @@ -475,7 +461,6 @@ sowrite(struct socket *so) nn +=3D ret; } DEBUG_MISC((dfd, " ... wrote nn =3D %d bytes\n", nn)); -#endif =20 /* Update sbuf */ sb->sb_cc -=3D nn; --=20 2.20.1