linux-kernel - [PATCH 4.19 248/313] xfs: Fix xqmstats offsets in /proc/fs/xfs/xqmstat

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Date:   Mon, 11 Feb 2019 15:18:48 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Carlos Maiolino <cmaiolino@...hat.com>,
        Eric Sandeen <sandeen@...hat.com>,
        Dave Chinner <david@...morbit.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 248/313] xfs: Fix xqmstats offsets in /proc/fs/xfs/xqmstat

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

commit 41657e5507b13e963be906d5d874f4f02374fd5c upstream.

The addition of FIBT, RMAP and REFCOUNT changed the offsets into
__xfssats structure.

This caused xqmstat_proc_show() to display garbage data via
/proc/fs/xfs/xqmstat, once it relies on the offsets marked via macros.

Fix it.

Fixes: 00f4e4f9 xfs: add rmap btree stats infrastructure
Fixes: aafc3c24 xfs: support the XFS_BTNUM_FINOBT free inode btree type
Fixes: 46eeb521 xfs: introduce refcount btree definitions
Signed-off-by: Carlos Maiolino <cmaiolino@...hat.com>
Reviewed-by: Eric Sandeen <sandeen@...hat.com>
Signed-off-by: Dave Chinner <david@...morbit.com>
Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/xfs/xfs_stats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index 4e4423153071..740ac9674848 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -119,7 +119,7 @@ static int xqmstat_proc_show(struct seq_file *m, void *v)
 	int j;
 
 	seq_printf(m, "qm");
-	for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++)
+	for (j = XFSSTAT_END_REFCOUNT; j < XFSSTAT_END_XQMSTAT; j++)
 		seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j));
 	seq_putc(m, '\n');
 	return 0;
-- 
2.19.1