From patchwork Tue Dec 10 12:30:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Mayhew X-Patchwork-Id: 11282279 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AA23714BD for ; Tue, 10 Dec 2019 12:32:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7EA7C20828 for ; Tue, 10 Dec 2019 12:32:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="AVIY8xC4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727483AbfLJMcn (ORCPT ); Tue, 10 Dec 2019 07:32:43 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:36892 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727412AbfLJMbY (ORCPT ); Tue, 10 Dec 2019 07:31:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1575981081; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fbdrkapHLLKH5mkxtqO26NmoIcSlRfGq27jM+DUC/Nw=; b=AVIY8xC4jqHUbq5PY7wnGN2nXeOaskBHyobYbXARVOg/Uz+t6478L7heMgpOJ31yGjab5z vl7RosP8GaV0dGaXu3E5CmNdC8TDK9XWmJFqOcAJI+f1o9zn0lsJmqwSohaXK030oA3k4M lpzyPsUbsndx8Pd2S4YZq+8U1lTQ3b8= 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-370-VZzVeAueN_qo1xjIUidlwA-1; Tue, 10 Dec 2019 07:31:17 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 92CD22F60; Tue, 10 Dec 2019 12:31:16 +0000 (UTC) Received: from coeurl.usersys.redhat.com (ovpn-123-90.rdu2.redhat.com [10.10.123.90]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2390E5C241; Tue, 10 Dec 2019 12:31:16 +0000 (UTC) Received: by coeurl.usersys.redhat.com (Postfix, from userid 1000) id 9B9AA20B4C; Tue, 10 Dec 2019 07:31:15 -0500 (EST) From: Scott Mayhew To: anna.schumaker@netapp.com, trond.myklebust@hammerspace.com Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH v6 03/27] nfs: lift setting mount_info from nfs4_remote{,_referral}_mount Date: Tue, 10 Dec 2019 07:30:51 -0500 Message-Id: <20191210123115.1655-4-smayhew@redhat.com> In-Reply-To: <20191210123115.1655-1-smayhew@redhat.com> References: <20191210123115.1655-1-smayhew@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-MC-Unique: VZzVeAueN_qo1xjIUidlwA-1 X-Mimecast-Spam-Score: 0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: From: Al Viro Do that (fhandle allocation, setting struct server up) in nfs4_referral_mount() and nfs4_try_mount() resp. and pass the server and pointer to mount_info into nfs_do_root_mount() so that nfs4_remote_referral_mount()/nfs_remote_mount() could be merged. Since we are moving stuff from ->mount() instances to the points prior to vfs_kern_mount() that would trigger those, we need to make sure that do_nfs_root_mount() will do the corresponding cleanup itself if it doesn't trigger those ->mount() instances. Reviewed-by: David Howells Signed-off-by: Al Viro --- fs/nfs/nfs4super.c | 67 ++++++++++++++++++++++++---------------------- 1 file changed, 35 insertions(+), 32 deletions(-) diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c index e7f2fd1925b1..ac3e8928643d 100644 --- a/fs/nfs/nfs4super.c +++ b/fs/nfs/nfs4super.c @@ -108,32 +108,37 @@ static struct dentry * nfs4_remote_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *info) { - struct nfs_mount_info *mount_info = info; - - mount_info->set_security = nfs_set_sb_security; - - /* Get a volume representation */ - mount_info->server = nfs4_create_server(mount_info, &nfs_v4); - return nfs_fs_mount_common(flags, dev_name, mount_info, &nfs_v4); + return nfs_fs_mount_common(flags, dev_name, info, &nfs_v4); } static struct vfsmount *nfs_do_root_mount(struct file_system_type *fs_type, - int flags, void *data, const char *hostname) + struct nfs_server *server, int flags, + struct nfs_mount_info *info, + const char *hostname) { struct vfsmount *root_mnt; char *root_devname; size_t len; + if (IS_ERR(server)) + return ERR_CAST(server); + len = strlen(hostname) + 5; root_devname = kmalloc(len, GFP_KERNEL); - if (root_devname == NULL) + if (root_devname == NULL) { + nfs_free_server(server); return ERR_PTR(-ENOMEM); + } /* Does hostname needs to be enclosed in brackets? */ if (strchr(hostname, ':')) snprintf(root_devname, len, "[%s]:/", hostname); else snprintf(root_devname, len, "%s:/", hostname); - root_mnt = vfs_kern_mount(fs_type, flags, root_devname, data); + info->server = server; + root_mnt = vfs_kern_mount(fs_type, flags, root_devname, info); + if (info->server) + nfs_free_server(info->server); + info->server = NULL; kfree(root_devname); return root_mnt; } @@ -234,11 +239,15 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct dentry *res; struct nfs_parsed_mount_data *data = mount_info->parsed; + mount_info->set_security = nfs_set_sb_security; + dfprintk(MOUNT, "--> nfs4_try_mount()\n"); export_path = data->nfs_server.export_path; data->nfs_server.export_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, flags, mount_info, + root_mnt = nfs_do_root_mount(&nfs4_remote_fs_type, + nfs4_create_server(mount_info, &nfs_v4), + flags, mount_info, data->nfs_server.hostname); data->nfs_server.export_path = export_path; @@ -254,25 +263,7 @@ static struct dentry * nfs4_remote_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { - struct nfs_mount_info mount_info = { - .fill_super = nfs_fill_super, - .set_security = nfs_clone_sb_security, - .cloned = raw_data, - }; - struct dentry *mntroot = ERR_PTR(-ENOMEM); - - dprintk("--> nfs4_referral_get_sb()\n"); - - mount_info.mntfh = nfs_alloc_fhandle(); - if (mount_info.cloned == NULL || mount_info.mntfh == NULL) - goto out; - - /* create a new volume representation */ - mount_info.server = nfs4_create_referral_server(mount_info.cloned, mount_info.mntfh); - mntroot = nfs_fs_mount_common(flags, dev_name, &mount_info, &nfs_v4); -out: - nfs_free_fhandle(mount_info.mntfh); - return mntroot; + return nfs_fs_mount_common(flags, dev_name, raw_data, &nfs_v4); } /* @@ -282,23 +273,35 @@ static struct dentry *nfs4_referral_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data) { struct nfs_clone_mount *data = raw_data; + struct nfs_mount_info mount_info = { + .fill_super = nfs_fill_super, + .set_security = nfs_clone_sb_security, + .cloned = data, + }; char *export_path; struct vfsmount *root_mnt; struct dentry *res; dprintk("--> nfs4_referral_mount()\n"); + mount_info.mntfh = nfs_alloc_fhandle(); + if (!mount_info.mntfh) + return ERR_PTR(-ENOMEM); + export_path = data->mnt_path; data->mnt_path = "/"; - root_mnt = nfs_do_root_mount(&nfs4_remote_referral_fs_type, - flags, data, data->hostname); + nfs4_create_referral_server(mount_info.cloned, + mount_info.mntfh), + flags, &mount_info, data->hostname); data->mnt_path = export_path; res = nfs_follow_remote_path(root_mnt, export_path); dprintk("<-- nfs4_referral_mount() = %d%s\n", PTR_ERR_OR_ZERO(res), IS_ERR(res) ? " [error]" : ""); + + nfs_free_fhandle(mount_info.mntfh); return res; }