From patchwork Thu Feb 4 15:02:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 12067523 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MIME_BASE64_TEXT,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4951AC433DB for ; Thu, 4 Feb 2021 15:06:58 +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 D955664DF2 for ; Thu, 4 Feb 2021 15:06:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D955664DF2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60610 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l7gDf-0007OW-Th for qemu-devel@archiver.kernel.org; Thu, 04 Feb 2021 10:06:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40536) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l7g9V-000308-Q9 for qemu-devel@nongnu.org; Thu, 04 Feb 2021 10:02:38 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:50567) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1l7g9T-0002XV-Ug for qemu-devel@nongnu.org; Thu, 04 Feb 2021 10:02:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1612450955; 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=dUguKk7pEcNYDonCk/K2qnrIwMEERiH0yxbvA57CzCA=; b=IUKCiqUTpoiEGzmhxTd4ZxTbrb/qE2euCbDUbjeMaBobkZ1aCWmk/Fq6p23U2ToA9ZTnHu ym2kNXaXb9qjDtPeKjJOBAbUZwFgqb2B/0vwQR8gE4ajmYgyfnOJ5ZsDJfzsAPDvUceb4E aSczUb9XllpcqskNo8wlyyIjMF+0bto= 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-394-lo0YQtksOKmX4yrWH2z8Aw-1; Thu, 04 Feb 2021 10:02:33 -0500 X-MC-Unique: lo0YQtksOKmX4yrWH2z8Aw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7D1FA1936B61; Thu, 4 Feb 2021 15:02:32 +0000 (UTC) Received: from localhost (ovpn-115-89.ams2.redhat.com [10.36.115.89]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8D3B55DA2D; Thu, 4 Feb 2021 15:02:21 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v5 1/3] virtiofsd: extract lo_do_open() from lo_open() Date: Thu, 4 Feb 2021 15:02:06 +0000 Message-Id: <20210204150208.367837-2-stefanha@redhat.com> In-Reply-To: <20210204150208.367837-1-stefanha@redhat.com> References: <20210204150208.367837-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -13 X-Spam_score: -1.4 X-Spam_bar: - X-Spam_report: (-1.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.351, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MIME_BASE64_TEXT=1.741, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: mszeredi@redhat.com, Daniel Berrange , slp@redhat.com, Greg Kurz , P J P , virtio-fs@redhat.com, vgoyal@redhat.com, Stefan Hajnoczi , Laszlo Ersek , "Dr. David Alan Gilbert" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Both lo_open() and lo_create() have similar code to open a file. Extract a common lo_do_open() function from lo_open() that will be used by lo_create() in a later commit. Since lo_do_open() does not otherwise need fuse_req_t req, convert lo_add_fd_mapping() to use struct lo_data *lo instead. Signed-off-by: Stefan Hajnoczi Reviewed-by: Greg Kurz --- v4: * Return positive errno if openat(2) fails in lo_do_open() [Greg] --- tools/virtiofsd/passthrough_ll.c | 73 ++++++++++++++++++++------------ 1 file changed, 46 insertions(+), 27 deletions(-) diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c index 5fb36d9407..f14fa5124d 100644 --- a/tools/virtiofsd/passthrough_ll.c +++ b/tools/virtiofsd/passthrough_ll.c @@ -459,17 +459,17 @@ static void lo_map_remove(struct lo_map *map, size_t key) } /* Assumes lo->mutex is held */ -static ssize_t lo_add_fd_mapping(fuse_req_t req, int fd) +static ssize_t lo_add_fd_mapping(struct lo_data *lo, int fd) { struct lo_map_elem *elem; - elem = lo_map_alloc_elem(&lo_data(req)->fd_map); + elem = lo_map_alloc_elem(&lo->fd_map); if (!elem) { return -1; } elem->fd = fd; - return elem - lo_data(req)->fd_map.elems; + return elem - lo->fd_map.elems; } /* Assumes lo->mutex is held */ @@ -1651,6 +1651,38 @@ static void update_open_flags(int writeback, int allow_direct_io, } } +static int lo_do_open(struct lo_data *lo, struct lo_inode *inode, + struct fuse_file_info *fi) +{ + char buf[64]; + ssize_t fh; + int fd; + + update_open_flags(lo->writeback, lo->allow_direct_io, fi); + + sprintf(buf, "%i", inode->fd); + fd = openat(lo->proc_self_fd, buf, fi->flags & ~O_NOFOLLOW); + if (fd == -1) { + return errno; + } + + pthread_mutex_lock(&lo->mutex); + fh = lo_add_fd_mapping(lo, fd); + pthread_mutex_unlock(&lo->mutex); + if (fh == -1) { + close(fd); + return ENOMEM; + } + + fi->fh = fh; + if (lo->cache == CACHE_NONE) { + fi->direct_io = 1; + } else if (lo->cache == CACHE_ALWAYS) { + fi->keep_cache = 1; + } + return 0; +} + static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name, mode_t mode, struct fuse_file_info *fi) { @@ -1691,7 +1723,7 @@ static void lo_create(fuse_req_t req, fuse_ino_t parent, const char *name, ssize_t fh; pthread_mutex_lock(&lo->mutex); - fh = lo_add_fd_mapping(req, fd); + fh = lo_add_fd_mapping(lo, fd); pthread_mutex_unlock(&lo->mutex); if (fh == -1) { close(fd); @@ -1892,38 +1924,25 @@ static void lo_fsyncdir(fuse_req_t req, fuse_ino_t ino, int datasync, static void lo_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi) { - int fd; - ssize_t fh; - char buf[64]; struct lo_data *lo = lo_data(req); + struct lo_inode *inode = lo_inode(req, ino); + int err; fuse_log(FUSE_LOG_DEBUG, "lo_open(ino=%" PRIu64 ", flags=%d)\n", ino, fi->flags); - update_open_flags(lo->writeback, lo->allow_direct_io, fi); - - sprintf(buf, "%i", lo_fd(req, ino)); - fd = openat(lo->proc_self_fd, buf, fi->flags & ~O_NOFOLLOW); - if (fd == -1) { - return (void)fuse_reply_err(req, errno); - } - - pthread_mutex_lock(&lo->mutex); - fh = lo_add_fd_mapping(req, fd); - pthread_mutex_unlock(&lo->mutex); - if (fh == -1) { - close(fd); - fuse_reply_err(req, ENOMEM); + if (!inode) { + fuse_reply_err(req, EBADF); return; } - fi->fh = fh; - if (lo->cache == CACHE_NONE) { - fi->direct_io = 1; - } else if (lo->cache == CACHE_ALWAYS) { - fi->keep_cache = 1; + err = lo_do_open(lo, inode, fi); + lo_inode_put(lo, &inode); + if (err) { + fuse_reply_err(req, err); + } else { + fuse_reply_open(req, fi); } - fuse_reply_open(req, fi); } static void lo_release(fuse_req_t req, fuse_ino_t ino,