linux-kernel - [PATCH] f2fs: fix to update {m,c}time correctly when truncating larger

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Date:	Mon, 28 Sep 2015 17:46:01 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	Jaegeuk Kim <jaegeuk@...nel.org>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH] f2fs: fix to update {m,c}time correctly when truncating larger

This patch fixes to update ctime and atime correctly when truncating
larger in ->setattr.

The bug is reported by xfstest generic/313 as below:

generic/313 2s ... - output mismatch (see ./results/generic/313.out.bad)
    --- tests/generic/313.out   2015-08-04 15:28:53.430798882 +0800
    +++ results/generic/313.out.bad   2015-09-28 17:04:27.294278016 +0800
    @@ -1,2 +1,4 @@
     QA output created by 313
     Silence is golden
    +ctime not updated after truncate up
    +mtime not updated after truncate up
    ...
    (Run 'diff -u tests/generic/313.out tests/generic/313.out.bad'  to see the entire diff)
Ran: generic/313
Failures: generic/313
Failed 1 of 1 tests

Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
 fs/f2fs/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c365f66..06898f1 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -681,6 +681,7 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 			 * larger than i_size.
 			 */
 			truncate_setsize(inode, attr->ia_size);
+			inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		}
 	}
 
-- 
2.5.2


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