From patchwork Sun Sep 27 22:09:10 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7274471 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0C2DFBEEA4 for ; Sun, 27 Sep 2015 22:30:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 199B42072B for ; Sun, 27 Sep 2015 22:30:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 128B02071A for ; Sun, 27 Sep 2015 22:30:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756018AbbI0WLi (ORCPT ); Sun, 27 Sep 2015 18:11:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35002 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756007AbbI0WLf (ORCPT ); Sun, 27 Sep 2015 18:11:35 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id 3C6B78C1A3; Sun, 27 Sep 2015 22:11:35 +0000 (UTC) Received: from nuc.home.com (vpn1-4-81.ams2.redhat.com [10.36.4.81]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t8RM9cdn030610; Sun, 27 Sep 2015 18:11:29 -0400 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org Cc: "Aneesh Kumar K.V" Subject: [PATCH v8 19/41] ext4: Add richacl feature flag Date: Mon, 28 Sep 2015 00:09:10 +0200 Message-Id: <1443391772-10171-20-git-send-email-agruenba@redhat.com> In-Reply-To: <1443391772-10171-1-git-send-email-agruenba@redhat.com> References: <1443391772-10171-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Aneesh Kumar K.V" This feature flag selects richacl instead of posix acl support on the file system. In addition, the "acl" mount option is needed for enabling either of the two kinds of acls. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Andreas Gruenbacher --- fs/ext4/ext4.h | 6 ++++-- fs/ext4/super.c | 42 +++++++++++++++++++++++++++++++++--------- 2 files changed, 37 insertions(+), 11 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index fd1f28b..b97a3b1 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -991,7 +991,7 @@ struct ext4_inode_info { #define EXT4_MOUNT_UPDATE_JOURNAL 0x01000 /* Update the journal format */ #define EXT4_MOUNT_NO_UID32 0x02000 /* Disable 32-bit UIDs */ #define EXT4_MOUNT_XATTR_USER 0x04000 /* Extended user attributes */ -#define EXT4_MOUNT_POSIX_ACL 0x08000 /* POSIX Access Control Lists */ +#define EXT4_MOUNT_ACL 0x08000 /* Access Control Lists */ #define EXT4_MOUNT_NO_AUTO_DA_ALLOC 0x10000 /* No auto delalloc mapping */ #define EXT4_MOUNT_BARRIER 0x20000 /* Use block barriers */ #define EXT4_MOUNT_QUOTA 0x80000 /* Some quota option set */ @@ -1582,6 +1582,7 @@ static inline int ext4_encrypted_inode(struct inode *inode) #define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3-lvl htree */ #define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */ #define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 +#define EXT4_FEATURE_INCOMPAT_RICHACL 0x20000 #define EXT2_FEATURE_COMPAT_SUPP EXT4_FEATURE_COMPAT_EXT_ATTR #define EXT2_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE| \ @@ -1607,7 +1608,8 @@ static inline int ext4_encrypted_inode(struct inode *inode) EXT4_FEATURE_INCOMPAT_FLEX_BG| \ EXT4_FEATURE_INCOMPAT_MMP | \ EXT4_FEATURE_INCOMPAT_INLINE_DATA | \ - EXT4_FEATURE_INCOMPAT_ENCRYPT) + EXT4_FEATURE_INCOMPAT_ENCRYPT | \ + EXT4_FEATURE_INCOMPAT_RICHACL) #define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \ EXT4_FEATURE_RO_COMPAT_LARGE_FILE| \ EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \ diff --git a/fs/ext4/super.c b/fs/ext4/super.c index a63c7b0..84d1a5d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1270,6 +1270,28 @@ static ext4_fsblk_t get_sb_block(void **data) return sb_block; } +static int enable_acl(struct super_block *sb) +{ + sb->s_flags &= ~(MS_POSIXACL | MS_RICHACL); + if (test_opt(sb, ACL)) { + if (EXT4_HAS_INCOMPAT_FEATURE(sb, + EXT4_FEATURE_INCOMPAT_RICHACL)) { +#ifdef CONFIG_EXT4_FS_RICHACL + sb->s_flags |= MS_RICHACL; +#else + return -EOPNOTSUPP; +#endif + } else { +#ifdef CONFIG_EXT4_FS_POSIX_ACL + sb->s_flags |= MS_POSIXACL; +#else + return -EOPNOTSUPP; +#endif + } + } + return 0; +} + #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; @@ -1416,9 +1438,9 @@ static const struct mount_opts { MOPT_NO_EXT2 | MOPT_DATAJ}, {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, -#ifdef CONFIG_EXT4_FS_POSIX_ACL - {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, - {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, +#if defined(CONFIG_EXT4_FS_POSIX_ACL) || defined(CONFIG_EXT4_FS_RICHACL) + {Opt_acl, EXT4_MOUNT_ACL, MOPT_SET}, + {Opt_noacl, EXT4_MOUNT_ACL, MOPT_CLEAR}, #else {Opt_acl, 0, MOPT_NOSUPPORT}, {Opt_noacl, 0, MOPT_NOSUPPORT}, @@ -3576,8 +3598,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) set_opt(sb, NO_UID32); /* xattr user namespace & acls are now defaulted on */ set_opt(sb, XATTR_USER); -#ifdef CONFIG_EXT4_FS_POSIX_ACL - set_opt(sb, POSIX_ACL); +#if defined(CONFIG_EXT4_FS_POSIX_ACL) || defined(CONFIG_EXT4_FS_RICHACL) + set_opt(sb, ACL); #endif /* don't forget to enable journal_csum when metadata_csum is enabled. */ if (ext4_has_metadata_csum(sb)) @@ -3660,8 +3682,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) sb->s_iflags |= SB_I_CGROUPWB; } - sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | - (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); + err = enable_acl(sb); + if (err) + goto failed_mount; if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || @@ -4981,8 +5004,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) ext4_abort(sb, "Abort forced by user"); - sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | - (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); + err = enable_acl(sb); + if (err) + goto restore_opts; es = sbi->s_es;