From patchwork Mon Aug 29 18:38:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksandar Markovic X-Patchwork-Id: 9304325 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5D9936077C for ; Mon, 29 Aug 2016 18:40:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 51195281E1 for ; Mon, 29 Aug 2016 18:40:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4598828761; Mon, 29 Aug 2016 18:40:06 +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=-6.9 required=2.0 tests=BAYES_00,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 151472870C for ; Mon, 29 Aug 2016 18:40:04 +0000 (UTC) Received: from localhost ([::1]:45186 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beRTW-0004WG-EG for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Aug 2016 14:40:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34587) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beRT7-0004UV-Tw for qemu-devel@nongnu.org; Mon, 29 Aug 2016 14:39:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1beRT3-0000aW-MJ for qemu-devel@nongnu.org; Mon, 29 Aug 2016 14:39:36 -0400 Received: from mx2.rt-rk.com ([89.216.37.149]:37157 helo=mail.rt-rk.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1beRT3-0000Rw-E8 for qemu-devel@nongnu.org; Mon, 29 Aug 2016 14:39:33 -0400 Received: from localhost (localhost [127.0.0.1]) by mail.rt-rk.com (Postfix) with ESMTP id 6A4E81A23A8; Mon, 29 Aug 2016 20:39:09 +0200 (CEST) X-Virus-Scanned: amavisd-new at rt-rk.com Received: from mcs19.ba.imgtec.org (unknown [82.117.201.26]) by mail.rt-rk.com (Postfix) with ESMTPSA id 484BF1A416B; Mon, 29 Aug 2016 20:39:09 +0200 (CEST) From: Aleksandar Markovic To: riku.voipio@iki.fi Date: Mon, 29 Aug 2016 20:38:50 +0200 Message-Id: <1472495930-15155-4-git-send-email-aleksandar.markovic@rt-rk.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1472495930-15155-1-git-send-email-aleksandar.markovic@rt-rk.com> References: <1472495930-15155-1-git-send-email-aleksandar.markovic@rt-rk.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 89.216.37.149 Subject: [Qemu-devel] [PATCH 3/3] linux-user: Add support for ustat() syscall 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: miodrag.dinic@imgtec.com, aleksandar.markovic@imgtec.com, aleksandar.rikalo@imgtec.com, qemu-devel@nongnu.org, petar.jovanovic@imgtec.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Aleksandar Markovic This patch implements Qemu user mode ustat() syscall support. Syscall ustat() returns information about a mounted filesystem. The implementation is similar to the implementations of statfs(), fstatfs() and other related syscalls. It is based on invocation of host's ustat(), and its key part is in the correspondent case segment of the main switch statement of the function do_syscall(), in file linux-user/syscalls.c. All necessary conversions of data structures from target to host and from host to target are covered. Sufficient support for "-strace" option for this syscall is already present, and this patch does not change it. This patch also fixes failures of LTP tests ustat01, and ustat02, if executed on Qemu-emulated systems. Signed-off-by: Aleksandar Markovic --- linux-user/syscall.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 3234f9c..908f114 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -48,6 +48,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base, #include #include #include +#include #include #include #include @@ -8096,7 +8097,29 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; #ifdef TARGET_NR_ustat case TARGET_NR_ustat: - goto unimplemented; + { + struct ustat ust; + int cnt; + ret = get_errno(ustat(arg1, &ust)); + + if (!is_error(ret)) { + struct ustat *target_ust; + + if (!lock_user_struct(VERIFY_WRITE, target_ust, arg2, 0)) { + goto efault; + } + + __put_user(ust.f_tfree, &target_ust->f_tfree); + __put_user(ust.f_tinode, &target_ust->f_tinode); + + for (cnt = 0; cnt < 6; cnt++) { + __put_user(ust.f_fname[cnt], &target_ust->f_fname[cnt]); + __put_user(ust.f_fpack[cnt], &target_ust->f_fpack[cnt]); + } + unlock_user_struct(target_ust, arg2, 1); + } + break; + } #endif #ifdef TARGET_NR_dup2 case TARGET_NR_dup2: