Return-Path: Received: from mgwym04.jp.fujitsu.com ([211.128.242.43]:55951 "EHLO mgwym04.jp.fujitsu.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751686AbeEUBHJ (ORCPT ); Sun, 20 May 2018 21:07:09 -0400 Received: from g01jpfmpwkw01.exch.g01.fujitsu.local (g01jpfmpwkw01.exch.g01.fujitsu.local [10.0.193.38]) by yt-mxq.gw.nic.fujitsu.com (Postfix) with ESMTP id 8EB9CAC00B3 for ; Mon, 21 May 2018 10:07:02 +0900 (JST) Received: from G01JPEXCHKW18.g01.fujitsu.local (G01JPEXCHKW18.g01.fujitsu.local [10.0.194.57]) by g01jpfmpwkw01.exch.g01.fujitsu.local (Postfix) with ESMTP id A2EDB6923DB for ; Mon, 21 May 2018 10:07:00 +0900 (JST) From: Tomohiro Misono To: Subject: [PATCH v7 0/3] btrfs: Add three new unprivileged ioctls to allow normal users to call "sub list/show" etc. Date: Mon, 21 May 2018 10:09:41 +0900 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: changelog: v6 -> v7 - Rebase to current misc-next again - Fix 1st patch where otime is wrongly set instead of ctime - Add reviewed-by/tested-by tag v5 -> v6 - Update 1st patch by using btrfs_fs_root_no_name() - Return -EUCLEAN when btrfs_next_leaf/next_item() should not fail - Add Reviewed-by tag v4 -> v5 - Update error handling of 1st/2nd patch. See each log for details - Fix misspelling v3 -> v4 - call btrfs_next_leaf() after btrfs_search_slot() when the slot position exceeds the number of items - rebased to current misc-next v2 -> v3 - fix kbuild test bot warning v1 -> v2 - completely reimplement 1st/2nd ioctl to have user friendly api - various cleanup, remove unnecessary goto === This adds three new unprivileged ioctls: 1st patch: ioctl which returns subvolume information of ROOT_ITEM and ROOT_BACKREF 2nd patch: ioctl which returns subvolume information of ROOT_REF (without subvolume name) 3rd patch: user version of ino_lookup ioctl which also performs permission check. They will be used to implement user version of "subvolume list/show" etc. in user tools. See each commit log for more detals. The implementation of btrfs-progs can be found in the ML titled as follows: [PATCH 0/11] btrfs-progs: Rework of "subvolume list/show" and relax the root privileges of them Tomohiro Misono (3): btrfs: Add unprivileged ioctl which returns subvolume information btrfs: Add unprivileged ioctl which returns subvolume's ROOT_REF btrfs: Add unprivileged version of ino_lookup ioctl fs/btrfs/ioctl.c | 431 +++++++++++++++++++++++++++++++++++++++++++++ include/uapi/linux/btrfs.h | 84 +++++++++ 2 files changed, 515 insertions(+) -- 2.14.3