From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2F66C4332F for ; Thu, 31 Mar 2022 15:35:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238957AbiCaPg6 (ORCPT ); Thu, 31 Mar 2022 11:36:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238785AbiCaPfv (ORCPT ); Thu, 31 Mar 2022 11:35:51 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B721722321F; Thu, 31 Mar 2022 08:32:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 2026FB82177; Thu, 31 Mar 2022 15:32:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 21870C340ED; Thu, 31 Mar 2022 15:32:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1648740721; bh=JV6DWBtNc7YAaGz5tAIF8u9Z93JxBLiI8F5s9HV2DOU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S35u22wSQFBS3e1DGjuP0fMpA7Ep0aiRVhfCqNRzBZYywKIqCpG4xZ7NOPsnEP00S U+VX5DMIdjWxqXvtQjguI2JfaYw3xmhhiPf+L/5X4DqMBpo0oGiOxabmW+Wf7GAwEh GnKnzqpHqa1Dp5t5g7czBM2gNz8Uv5A8c4Bc5/YPAw1j7epl+yJxwH07TSNusRxhz9 s+aVebvptp5MU6tVG4QNrwZQhTqAPjLxs5T4BrkNP9QZCl6Pz/thSmJcwOu2Odqg6K Xzi+yPYu5flRKNCnZWwi9wGaSZDCEkIBR8PBhYi+iaZjqEkuxfSpYuvqwFDVQO/Z8d T0J+3a9fByKkA== From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: xiubli@redhat.com, idryomov@gmail.com, lhenriques@suse.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v12 32/54] ceph: add some fscrypt guardrails Date: Thu, 31 Mar 2022 11:31:08 -0400 Message-Id: <20220331153130.41287-33-jlayton@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220331153130.41287-1-jlayton@kernel.org> References: <20220331153130.41287-1-jlayton@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the appropriate calls into fscrypt for various actions, including link, rename, setattr, and the open codepaths. Signed-off-by: Jeff Layton --- fs/ceph/dir.c | 8 ++++++++ fs/ceph/file.c | 14 +++++++++++++- fs/ceph/inode.c | 4 ++++ 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 82a5f37e9d4a..8a9f916bfc6c 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1121,6 +1121,10 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir, if (ceph_snap(dir) != CEPH_NOSNAP) return -EROFS; + err = fscrypt_prepare_link(old_dentry, dir, dentry); + if (err) + return err; + dout("link in dir %p old_dentry %p dentry %p\n", dir, old_dentry, dentry); req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LINK, USE_AUTH_MDS); @@ -1318,6 +1322,10 @@ static int ceph_rename(struct user_namespace *mnt_userns, struct inode *old_dir, (!ceph_quota_is_same_realm(old_dir, new_dir))) return -EXDEV; + err = fscrypt_prepare_rename(old_dir, old_dentry, new_dir, new_dentry, flags); + if (err) + return err; + dout("rename dir %p dentry %p to dir %p dentry %p\n", old_dir, old_dentry, new_dir, new_dentry); req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index f9f7dc4c902d..cb5962998f8b 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -372,8 +372,13 @@ int ceph_open(struct inode *inode, struct file *file) /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ flags = file->f_flags & ~(O_CREAT|O_EXCL); - if (S_ISDIR(inode->i_mode)) + if (S_ISDIR(inode->i_mode)) { flags = O_DIRECTORY; /* mds likes to know */ + } else if (S_ISREG(inode->i_mode)) { + err = fscrypt_file_open(inode, file); + if (err) + return err; + } dout("open inode %p ino %llx.%llx file %p flags %d (%d)\n", inode, ceph_vinop(inode), file, flags, file->f_flags); @@ -849,6 +854,13 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, dout("atomic_open finish_no_open on dn %p\n", dn); err = finish_no_open(file, dn); } else { + if (IS_ENCRYPTED(dir) && + !fscrypt_has_permitted_context(dir, d_inode(dentry))) { + pr_warn("Inconsistent encryption context (parent %llx:%llx child %llx:%llx)\n", + ceph_vinop(dir), ceph_vinop(d_inode(dentry))); + goto out_req; + } + dout("atomic_open finish_open on dn %p\n", dn); if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { struct inode *newino = d_inode(dentry); diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 08a0885a49f8..733f2a409346 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2486,6 +2486,10 @@ int ceph_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, if (ceph_inode_is_shutdown(inode)) return -ESTALE; + err = fscrypt_prepare_setattr(dentry, attr); + if (err) + return err; + err = setattr_prepare(&init_user_ns, dentry, attr); if (err != 0) return err; -- 2.35.1