From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 95793CD98CE for ; Fri, 12 Jun 2026 15:51:39 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wY49m-00016N-6Z; Fri, 12 Jun 2026 11:50:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wY49l-00016E-2L for qemu-devel@nongnu.org; Fri, 12 Jun 2026 11:50:53 -0400 Received: from tor.source.kernel.org ([172.105.4.254]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wY49i-00087T-Gd for qemu-devel@nongnu.org; Fri, 12 Jun 2026 11:50:52 -0400 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 969AC60008; Fri, 12 Jun 2026 15:50:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3AFB1F000E9; Fri, 12 Jun 2026 15:50:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781279449; bh=m4IDSyjWcAzO6Xi7rKP9aTp7TUacMkhUAjZNmS+VHtQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=J6LVtuxCkZjs38hy9uChhIfA9qolsVCdbJvrXys5kD5TSEzpwM/oOx3frAAmVM94E NNtBVkLNhIZZB6OtVqmZ903ifq+g/b22k64aa5WZWxWVxGxOKvP2zodDiG8zeU8dxd OXRUBcZLvg36fAR+VW2yiGjy7D9slm6tGB7t9UZyQaJqB0FRF6VzFH1DOjbwUZk6Eq uTTiK5enUzendJe4D+Nmk53vjikVfjdjQOQ6ZlVcSJsKqmrvLqQNu6IWubQ23PzXCm dqaxZoQiJxfuGAT5I7kY5fMj8xugAbcOGHz0kKhkVABYfljSQUTBbGc0YqR/594rHM wKNng3BACp0rg== From: Helge Deller To: Stefan Hajnoczi , qemu-devel@nongnu.org Cc: Helge Deller , Pierrick Bouvier , Laurent Vivier , Max Filippov , Dominique Martinet Subject: [PULL 1/4] linux-user: add preadv2/preadv2 Date: Fri, 12 Jun 2026 17:50:40 +0200 Message-ID: <20260612155043.3552-2-deller@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260612155043.3552-1-deller@kernel.org> References: <20260612155043.3552-1-deller@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=172.105.4.254; envelope-from=deller@kernel.org; helo=tor.source.kernel.org X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Dominique Martinet Some programs apparently use these, like the python test suite. The flags argument (rwf_t) is an int, with values shared on all arches and does not need translating. This was tested manually with the following python script: ``` import os fd = os.open('test', os.O_RDWR|os.O_CREAT) os.pwritev(fd, [b'test', b'ok'], 0, os.RWF_HIPRI) buf = [bytearray(3), bytearray(10)] os.preadv(fd, buf, 0, os.RWF_HIPRI) print(buf[0]) print(buf[1]) ``` Signed-off-by: Dominique Martinet Reviewed-by: Helge Deller Signed-off-by: Helge Deller --- linux-user/syscall.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 37ede95510..fbe357b7e0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -741,6 +741,11 @@ safe_syscall5(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt, unsigned long, pos_l, unsigned long, pos_h) safe_syscall5(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt, unsigned long, pos_l, unsigned long, pos_h) +safe_syscall6(ssize_t, preadv2, int, fd, const struct iovec *, iov, int, iovcnt, + unsigned long, pos_l, unsigned long, pos_h, __kernel_rwf_t, flags) +safe_syscall6(ssize_t, pwritev2, int, fd, const struct iovec *, iov, + int, iovcnt, unsigned long, pos_l, unsigned long, pos_h, + __kernel_rwf_t, flags) safe_syscall3(int, connect, int, fd, const struct sockaddr *, addr, socklen_t, addrlen) safe_syscall6(ssize_t, sendto, int, fd, const void *, buf, size_t, len, @@ -11907,6 +11912,39 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1, } } return ret; +#endif +#if defined(TARGET_NR_preadv2) + case TARGET_NR_preadv2: + { + struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0); + if (vec != NULL) { + unsigned long low, high; + + target_to_host_low_high(arg4, arg5, &low, &high); + ret = get_errno(safe_preadv2(arg1, vec, arg3, low, high, arg6)); + unlock_iovec(vec, arg2, arg3, 1); + } else { + ret = -host_to_target_errno(errno); + } + } + return ret; +#endif +#if defined(TARGET_NR_pwritev2) + case TARGET_NR_pwritev2: + { + struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); + if (vec != NULL) { + unsigned long low, high; + + target_to_host_low_high(arg4, arg5, &low, &high); + ret = get_errno(safe_pwritev2(arg1, vec, arg3, low, high, + arg6)); + unlock_iovec(vec, arg2, arg3, 0); + } else { + ret = -host_to_target_errno(errno); + } + } + return ret; #endif case TARGET_NR_getsid: return get_errno(getsid(arg1)); -- 2.54.0