From patchwork Wed Dec 20 15:18:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 10125831 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 708A860245 for ; Wed, 20 Dec 2017 15:18:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6468329736 for ; Wed, 20 Dec 2017 15:18:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5908F2975C; Wed, 20 Dec 2017 15:18:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EA74F29736 for ; Wed, 20 Dec 2017 15:18:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755571AbdLTPSx (ORCPT ); Wed, 20 Dec 2017 10:18:53 -0500 Received: from mx2.suse.de ([195.135.220.15]:33891 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755149AbdLTPSr (ORCPT ); Wed, 20 Dec 2017 10:18:47 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 631DDAE60; Wed, 20 Dec 2017 15:18:46 +0000 (UTC) Received: from localhost (hermes.olymp [local]) by hermes.olymp (OpenSMTPD) with ESMTPA id f04e1eec; Wed, 20 Dec 2017 15:18:42 +0000 (UTC) From: Luis Henriques To: ceph-devel@vger.kernel.org Cc: "Yan, Zheng" , Jeff Layton , Jan Fajerski , Luis Henriques Subject: [RFC PATCH v3 3/3] ceph: quota: don't allow cross-quota renames Date: Wed, 20 Dec 2017 15:18:41 +0000 Message-Id: <20171220151841.22355-4-lhenriques@suse.com> In-Reply-To: <20171220151841.22355-1-lhenriques@suse.com> References: <20171220151841.22355-1-lhenriques@suse.com> Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch changes ceph_rename so that -EXDEV is returned if an attempt is made to mv a file between two different dir trees with different quotas setup. Link: http://tracker.ceph.com/issues/22372 Signed-off-by: Luis Henriques --- fs/ceph/dir.c | 5 +++++ fs/ceph/quota.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ceph/super.h | 1 + 3 files changed, 64 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 66550d92b1ac..f6ac16caa1e9 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1090,6 +1090,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, else return -EROFS; } + /* don't allow cross-quota renames */ + if ((old_dir != new_dir) && + (!ceph_quota_is_same_realm(old_dir, new_dir))) + return -EXDEV; + 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/quota.c b/fs/ceph/quota.c index 06b3268f8f7f..14e372deb633 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -20,6 +20,11 @@ #include "super.h" #include "mds_client.h" +static inline bool ceph_has_quota(struct ceph_inode_info *ci) +{ + return (ci && (ci->i_max_files || ci->i_max_bytes)); +} + void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg) @@ -62,6 +67,59 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc, iput(inode); } +/* + * This function walks through the snaprealm for an inode and returns the + * ceph_inode_info for the first snaprealm that has quotas set (either max_files + * or max_bytes). If the root is reached, return the root ceph_inode_info + * instead. + */ +static struct ceph_inode_info *get_quota_realm(struct ceph_mds_client *mdsc, + struct inode *inode) +{ + struct ceph_inode_info *ci = NULL; + struct ceph_snap_realm *realm, *next; + struct ceph_vino vino; + struct inode *ino; + + realm = ceph_inode(inode)->i_snap_realm; + ceph_get_snap_realm(mdsc, realm); + while (realm) { + vino.ino = realm->ino; + vino.snap = CEPH_NOSNAP; + ino = ceph_find_inode(inode->i_sb, vino); + if (!ino) { + pr_warn("Failed to find inode for %llu\n", vino.ino); + break; + } + ci = ceph_inode(ino); + if (ceph_has_quota(ci) || (ci->i_vino.ino == CEPH_INO_ROOT)) { + iput(ino); + break; + } + iput(ino); + next = realm->parent; + ceph_get_snap_realm(mdsc, next); + ceph_put_snap_realm(mdsc, realm); + realm = next; + } + ceph_put_snap_realm(mdsc, realm); + + return ci; +} + +bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) +{ + struct ceph_mds_client *mdsc = ceph_inode_to_client(old)->mdsc; + struct ceph_inode_info *ci_old, *ci_new; + + down_read(&mdsc->snap_rwsem); + ci_old = get_quota_realm(mdsc, old); + ci_new = get_quota_realm(mdsc, new); + up_read(&mdsc->snap_rwsem); + + return (ci_old == ci_new); +} + enum quota_check_op { QUOTA_CHECK_MAX_FILES_OP /* check quota max_files limit */ }; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 20197e29a7f0..a66e73338386 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1027,5 +1027,6 @@ extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); +extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); #endif /* _FS_CEPH_SUPER_H */