Patch "xfs: update ctime and mtime on clone destinatation inodes" has been added to the 4.9-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    xfs: update ctime and mtime on clone destinatation inodes

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     xfs-update-ctime-and-mtime-on-clone-destinatation-inodes.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c5ecb42342852892f978572ddc6dca703460f25a Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 6 Feb 2017 17:45:51 -0800
Subject: xfs: update ctime and mtime on clone destinatation inodes

From: Christoph Hellwig <hch@lst.de>

commit c5ecb42342852892f978572ddc6dca703460f25a upstream.

We're changing both metadata and data, so we need to update the
timestamps for clone operations.  Dedupe on the other hand does
not change file data, and only changes invisible metadata so the
timestamps should not be updated.

This follows existing btrfs behavior.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: remove redundant is_dedupe test]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/xfs/xfs_reflink.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -985,13 +985,14 @@ STATIC int
 xfs_reflink_update_dest(
 	struct xfs_inode	*dest,
 	xfs_off_t		newlen,
-	xfs_extlen_t		cowextsize)
+	xfs_extlen_t		cowextsize,
+	bool			is_dedupe)
 {
 	struct xfs_mount	*mp = dest->i_mount;
 	struct xfs_trans	*tp;
 	int			error;
 
-	if (newlen <= i_size_read(VFS_I(dest)) && cowextsize == 0)
+	if (is_dedupe && newlen <= i_size_read(VFS_I(dest)) && cowextsize == 0)
 		return 0;
 
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
@@ -1012,6 +1013,10 @@ xfs_reflink_update_dest(
 		dest->i_d.di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
 	}
 
+	if (!is_dedupe) {
+		xfs_trans_ichgtime(tp, dest,
+				   XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+	}
 	xfs_trans_log_inode(tp, dest, XFS_ILOG_CORE);
 
 	error = xfs_trans_commit(tp);
@@ -1528,7 +1533,8 @@ xfs_reflink_remap_range(
 	    !(dest->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
 		cowextsize = src->i_d.di_cowextsize;
 
-	ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize);
+	ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize,
+			is_dedupe);
 
 out_unlock:
 	xfs_iunlock(src, XFS_MMAPLOCK_EXCL);


Patches currently in stable-queue which might be from hch@lst.de are

queue-4.9/xfs-mark-speculative-prealloc-cow-fork-extents-unwritten.patch
queue-4.9/xfs-fix-toctou-race-when-locking-an-inode-to-access-the-data-map.patch
queue-4.9/xfs-use-iomap-new-flag-for-newly-allocated-delalloc-blocks.patch
queue-4.9/xfs-reject-all-unaligned-direct-writes-to-reflinked-files.patch
queue-4.9/xfs-allow-unwritten-extents-in-the-cow-fork.patch
queue-4.9/xfs-tune-down-agno-asserts-in-the-bmap-code.patch
queue-4.9/xfs-verify-free-block-header-fields.patch
queue-4.9/xfs-check-for-obviously-bad-level-values-in-the-bmbt-root.patch
queue-4.9/xfs-don-t-fail-xfs_extent_busy-allocation.patch
queue-4.9/xfs-sync-eofblocks-scans-under-iolock-are-livelock-prone.patch
queue-4.9/xfs-use-per-ag-reservations-for-the-finobt.patch
queue-4.9/xfs-pull-up-iolock-from-xfs_free_eofblocks.patch
queue-4.9/xfs-fail-_dir_open-when-readahead-fails.patch
queue-4.9/xfs-update-ctime-and-mtime-on-clone-destinatation-inodes.patch
queue-4.9/xfs-only-update-mount-resv-fields-on-success-in-__xfs_ag_resv_init.patch
queue-4.9/xfs-use-xfs_icluster_size_fsb-to-calculate-inode-chunk-alignment.patch
queue-4.9/xfs-only-reclaim-unwritten-cow-extents-periodically.patch
queue-4.9/xfs-try-any-ag-when-allocating-the-first-btree-block-when-reflinking.patch
queue-4.9/xfs-fix-and-streamline-error-handling-in-xfs_end_io.patch
queue-4.9/xfs-fix-eofblocks-race-with-file-extending-async-dio-writes.patch