From patchwork Fri Sep 24 19:48:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 12516747 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3DAF1C4332F for ; Fri, 24 Sep 2021 19:51:48 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CA73161029 for ; Fri, 24 Sep 2021 19:51:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CA73161029 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:51874 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mTrEY-0006wH-VL for qemu-devel@archiver.kernel.org; Fri, 24 Sep 2021 15:51:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47422) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTrCe-0004AI-Lv for qemu-devel@nongnu.org; Fri, 24 Sep 2021 15:49:48 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:50669) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTrCR-0004F7-KX for qemu-devel@nongnu.org; Fri, 24 Sep 2021 15:49:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632512974; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AbU3zBpkTZISMheH/ABBF4b9YCeJ+lPJimNymFsSkZM=; b=Z5ECXaRTpcqROYQzmFg9dZCiILGdgBoDLYEeLUesoemMfGLUSbnepL/1/QdSFtPOFSPA4Q AwtymzSmnl0QIAcQaUQxjg+9kgUpHG4N5I0gQqDMeitQ/vzMOE8pYqBmHMzRjT60VXatzm FO1OmaoHkca1hnhu3Rh/TlJZW0Oxy+w= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-400-jxeJO__vPTu26QFpNpT3tw-1; Fri, 24 Sep 2021 15:49:33 -0400 X-MC-Unique: jxeJO__vPTu26QFpNpT3tw-1 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 37CBFABFEF; Fri, 24 Sep 2021 19:49:07 +0000 (UTC) Received: from horse.redhat.com (unknown [10.22.32.185]) by smtp.corp.redhat.com (Postfix) with ESMTP id BABB66B909; Fri, 24 Sep 2021 19:49:06 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 5D2CD228282; Fri, 24 Sep 2021 15:49:06 -0400 (EDT) From: Vivek Goyal To: qemu-devel@nongnu.org, virtio-fs@redhat.com Subject: [PATCH 3/5] virtiofsd: Move core file creation code in separate function Date: Fri, 24 Sep 2021 15:48:52 -0400 Message-Id: <20210924194854.919414-4-vgoyal@redhat.com> In-Reply-To: <20210924194854.919414-1-vgoyal@redhat.com> References: <20210924194854.919414-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vgoyal@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=170.10.133.124; envelope-from=vgoyal@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.473, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: miklos@szeredi.hu, chirantan@chromium.org, stephen.smalley.work@gmail.com, dwalsh@redhat.com, dgilbert@redhat.com, vgoyal@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Move core file creation bits in a separate function. Soon this is going to get more complex as file creation need to set security context also. And there will be multiple modes of file creation in next patch. Signed-off-by: Vivek Goyal --- tools/virtiofsd/passthrough_ll.c | 36 ++++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 11 deletions(-) diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index 64b5b4fbb1..54978b7fae 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -1976,6 +1976,30 @@ static int lo_do_open(struct lo_data *lo, struct lo_inode *inode, return 0; } +static int do_lo_create(fuse_req_t req, struct lo_inode *parent_inode, + const char *name, mode_t mode, + struct fuse_file_info *fi, int* open_fd) +{ + int err = 0, fd; + struct lo_cred old = {}; + struct lo_data *lo = lo_data(req); + + err = lo_change_cred(req, &old, lo->change_umask); + if (err) { + return err; + } + + /* Try to create a new file but don't open existing files */ + fd = openat(parent_inode->fd, name, fi->flags | O_CREAT | O_EXCL, mode); + if (fd == -1) { + err = errno; + } else { + *open_fd = fd; + } + lo_restore_cred(&old, lo->change_umask); + return err; +} + static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t mode, struct fuse_file_info *fi) { @@ -1985,7 +2009,6 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name, struct lo_inode *inode = NULL; struct fuse_entry_param e; int err; - struct lo_cred old = {}; fuse_log(FUSE_LOG_DEBUG, "lo_create(parent=%" PRIu64 ", name=%s)" " kill_priv=%d\n", parent, name, fi->kill_priv); @@ -2001,18 +2024,9 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name, return; } - err = lo_change_cred(req, &old, lo->change_umask); - if (err) { - goto out; - } - update_open_flags(lo->writeback, lo->allow_direct_io, fi); - /* Try to create a new file but don't open existing files */ - fd = openat(parent_inode->fd, name, fi->flags | O_CREAT | O_EXCL, mode); - err = fd == -1 ? errno : 0; - - lo_restore_cred(&old, lo->change_umask); + err = do_lo_create(req, parent_inode, name, mode, fi, &fd); /* Ignore the error if file exists and O_EXCL was not given */ if (err && (err != EEXIST || (fi->flags & O_EXCL))) {