From nobody Mon Feb 9 21:38:26 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; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1564130069; cv=none; d=zoho.com; s=zohoarc; b=IeWxL9nZihxA6MZBEPuvIjVWIL5+3awoTQTX711B45X9eSmdl1X1yuGlNTihammNoFeLvTeD3z15UQtP+ltomwYfcNN1YkL5EDfWq6wa5HaAixQfnUgvE6fHmi4YUVD2ODAVuIYAoUKIOe40vRXgLVsk/p04IUh3YUQzHKnBtf0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1564130069; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=B43ptkGRb9GvAWM21/N8a/xF3Ql+mFLxXU3jOzm0ROk=; b=D+AsFvr89tdREetIcGHkcQFndKJT3HE58Oh4VcPBPPpiKaagiwt2cGlNAdg28lGhkrsxySfo3U0h6wjdcYGGm3hHTCya9+DVvrvDOQfaU2urL3xKxZDv9iYLT+AzkOajDDEHClHJJN1VYnk5MWfH44A1gkWraakJV1v7205v3hs= ARC-Authentication-Results: i=1; mx.zoho.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; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1564130069723480.2860564540065; Fri, 26 Jul 2019 01:34:29 -0700 (PDT) Received: from localhost ([::1]:37376 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqvgK-0002JP-0c for importer@patchew.org; Fri, 26 Jul 2019 04:34:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45231) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hqvfl-0000Rh-0H for qemu-devel@nongnu.org; Fri, 26 Jul 2019 04:33:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hqvfh-0002Xr-Js for qemu-devel@nongnu.org; Fri, 26 Jul 2019 04:33:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45480) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hqvfh-0002Tl-DY for qemu-devel@nongnu.org; Fri, 26 Jul 2019 04:33:49 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B011030C583B for ; Fri, 26 Jul 2019 08:33:48 +0000 (UTC) Received: from localhost (ovpn-117-212.ams2.redhat.com [10.36.117.212]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9FC8A5D719; Fri, 26 Jul 2019 08:33:38 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org, virtio-fs@redhat.com Date: Fri, 26 Jul 2019 09:33:22 +0100 Message-Id: <20190726083322.13637-4-stefanha@redhat.com> In-Reply-To: <20190726083322.13637-1-stefanha@redhat.com> References: <20190726083322.13637-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Fri, 26 Jul 2019 08:33:48 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 3/3] virtiofsd: implement FUSE_INIT map_alignment field X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Dr. David Alan Gilbert" , Stefan Hajnoczi Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Communicate the host page size to the FUSE client so that FUSE_SETUPMAPPING/FUSE_REMOVEMAPPING requests are aware of our alignment constraints. Signed-off-by: Stefan Hajnoczi --- contrib/virtiofsd/fuse_lowlevel.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/contrib/virtiofsd/fuse_lowlevel.c b/contrib/virtiofsd/fuse_low= level.c index dbbfda78bf..452dd6b2b0 100644 --- a/contrib/virtiofsd/fuse_lowlevel.c +++ b/contrib/virtiofsd/fuse_lowlevel.c @@ -2131,6 +2131,12 @@ static void do_init(fuse_req_t req, fuse_ino_t nodei= d, } if (se->conn.proto_minor >=3D 23) outarg.time_gran =3D se->conn.time_gran; + if (arg->flags & FUSE_MAP_ALIGNMENT) { + outarg.flags |=3D FUSE_MAP_ALIGNMENT; + + /* This constraint comes from mmap(2) and munmap(2) */ + outarg.map_alignment =3D sysconf(_SC_PAGE_SIZE); + } =20 if (se->debug) { fuse_debug(" INIT: %u.%u\n", outarg.major, outarg.minor); @@ -2144,6 +2150,8 @@ static void do_init(fuse_req_t req, fuse_ino_t nodeid, outarg.congestion_threshold); fuse_debug(" time_gran=3D%u\n", outarg.time_gran); + fuse_debug(" map_alignment=3D%u\n", + outarg.map_alignment); } if (arg->minor < 5) outargsize =3D FUSE_COMPAT_INIT_OUT_SIZE; --=20 2.21.0