From patchwork Fri Aug 11 06:39:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9895061 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 9777D60351 for ; Fri, 11 Aug 2017 06:47:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 53A2C28C03 for ; Fri, 11 Aug 2017 06:47:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4809B28C12; Fri, 11 Aug 2017 06:47:55 +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 autolearn=unavailable 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 974CD28C03 for ; Fri, 11 Aug 2017 06:47:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752311AbdHKGqI (ORCPT ); Fri, 11 Aug 2017 02:46:08 -0400 Received: from mga04.intel.com ([192.55.52.120]:23512 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751359AbdHKGqD (ORCPT ); Fri, 11 Aug 2017 02:46:03 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Aug 2017 23:46:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,356,1498546800"; d="scan'208";a="1002493719" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by orsmga003.jf.intel.com with ESMTP; 10 Aug 2017 23:46:02 -0700 Subject: [PATCH v3 4/6] xfs: introduce XFS_DIFLAG2_IOMAP_IMMUTABLE From: Dan Williams To: darrick.wong@oracle.com Cc: Jan Kara , linux-nvdimm@lists.01.org, linux-api@vger.kernel.org, Dave Chinner , linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, Jeff Moyer , luto@kernel.org, linux-fsdevel@vger.kernel.org, Ross Zwisler , Christoph Hellwig Date: Thu, 10 Aug 2017 23:39:38 -0700 Message-ID: <150243357875.8777.18232126069814022161.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <150243355681.8777.14902834768886160223.stgit@dwillia2-desk3.amr.corp.intel.com> References: <150243355681.8777.14902834768886160223.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an on-disk inode flag to record the state of the S_IOMAP_IMMUTABLE in-memory vfs inode flags. This allows the protections against reflink and hole punch to be automatically restored on a sub-sequent boot when the in-memory inode is established. The FS_XFLAG_IOMAP_IMMUTABLE is introduced to allow xfs_io to read the state of the flag, but toggling the flag requires going through fallocate(FALLOC_FL_[UN]SEAL_BLOCK_MAP). Support for toggling this on-disk state is saved for a later patch. Cc: Jan Kara Cc: Jeff Moyer Cc: Christoph Hellwig Cc: Ross Zwisler Suggested-by: Dave Chinner Suggested-by: "Darrick J. Wong" Signed-off-by: Dan Williams --- fs/xfs/libxfs/xfs_format.h | 5 ++++- fs/xfs/xfs_inode.c | 2 ++ fs/xfs/xfs_ioctl.c | 1 + fs/xfs/xfs_iops.c | 8 +++++--- include/uapi/linux/fs.h | 1 + 5 files changed, 13 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" 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/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index d4d9bef20c3a..9e720e55776b 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -1063,12 +1063,15 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) #define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */ #define XFS_DIFLAG2_REFLINK_BIT 1 /* file's blocks may be shared */ #define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */ +#define XFS_DIFLAG2_IOMAP_IMMUTABLE_BIT 3 /* set S_IOMAP_IMMUTABLE for this inode */ #define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT) #define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT) #define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT) +#define XFS_DIFLAG2_IOMAP_IMMUTABLE (1 << XFS_DIFLAG2_IOMAP_IMMUTABLE_BIT) #define XFS_DIFLAG2_ANY \ - (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE) + (XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ + XFS_DIFLAG2_IOMAP_IMMUTABLE) /* * Inode number format: diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index ceef77c0416a..4ca22e272ce6 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -674,6 +674,8 @@ _xfs_dic2xflags( flags |= FS_XFLAG_DAX; if (di_flags2 & XFS_DIFLAG2_COWEXTSIZE) flags |= FS_XFLAG_COWEXTSIZE; + if (di_flags2 & XFS_DIFLAG2_IOMAP_IMMUTABLE) + flags |= FS_XFLAG_IOMAP_IMMUTABLE; } if (has_attr) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 2e64488bc4de..df2eef0f9d45 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -978,6 +978,7 @@ xfs_set_diflags( return; di_flags2 = (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK); + di_flags2 |= (ip->i_d.di_flags2 & XFS_DIFLAG2_IOMAP_IMMUTABLE); if (xflags & FS_XFLAG_DAX) di_flags2 |= XFS_DIFLAG2_DAX; if (xflags & FS_XFLAG_COWEXTSIZE) diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 469c9fa4c178..174ef95453f5 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -1186,9 +1186,10 @@ xfs_diflags_to_iflags( struct xfs_inode *ip) { uint16_t flags = ip->i_d.di_flags; + uint64_t flags2 = ip->i_d.di_flags2; inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | - S_NOATIME | S_DAX); + S_NOATIME | S_DAX | S_IOMAP_IMMUTABLE); if (flags & XFS_DIFLAG_IMMUTABLE) inode->i_flags |= S_IMMUTABLE; @@ -1201,9 +1202,10 @@ xfs_diflags_to_iflags( if (S_ISREG(inode->i_mode) && ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && !xfs_is_reflink_inode(ip) && - (ip->i_mount->m_flags & XFS_MOUNT_DAX || - ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) + (ip->i_mount->m_flags & XFS_MOUNT_DAX || flags2 & XFS_DIFLAG2_DAX)) inode->i_flags |= S_DAX; + if (flags2 & XFS_DIFLAG2_IOMAP_IMMUTABLE) + inode->i_flags |= S_IOMAP_IMMUTABLE; } /* diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index b7495d05e8de..4765e024ad74 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -182,6 +182,7 @@ struct fsxattr { #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ +#define FS_XFLAG_IOMAP_IMMUTABLE 0x00020000 /* block map immutable */ #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is