linux-kernel - [RFC PATCH] common/rc: Fix _check_s

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Date:   Wed,  2 Dec 2020 08:07:01 -0800
From:   ira.weiny@...el.com
To:     fstests@...r.kernel.org
Cc:     Ira Weiny <ira.weiny@...el.com>, linux-kernel@...r.kernel.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Christoph Hellwig <hch@....de>,
        "Theodore Y. Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
        Jeff Moyer <jmoyer@...hat.com>, linux-ext4@...r.kernel.org,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Eric Sandeen <sandeen@...hat.com>,
        David Howells <dhowells@...hat.com>
Subject: [RFC PATCH] common/rc: Fix _check_s_dax() for kernel 5.10

From: Ira Weiny <ira.weiny@...el.com>

There is a conflict with the user visible statx bits 'mount root' and
'dax'.  The kernel is shifting the dax bit.[1]

Adjust _check_s_dax() to use the new bit.

[1] https://lore.kernel.org/lkml/3e28d2c7-fbe5-298a-13ba-dcd8fd504666@redhat.com/

Signed-off-by: Ira Weiny <ira.weiny@...el.com>

---

I'm not seeing an easy way to check for kernel version.  It seems like that is
the right thing to do.  So do I need to do that by hand or is that something
xfstests does not worry about?

Ira

---
 common/rc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/common/rc b/common/rc
index b5a504e0dcb4..3d45e233954f 100644
--- a/common/rc
+++ b/common/rc
@@ -3222,9 +3222,9 @@ _check_s_dax()
 
 	local attributes=$($XFS_IO_PROG -c 'statx -r' $target | awk '/stat.attributes / { print $3 }')
 	if [ $exp_s_dax -eq 0 ]; then
-		(( attributes & 0x2000 )) && echo "$target has unexpected S_DAX flag"
+		(( attributes & 0x00200000 )) && echo "$target has unexpected S_DAX flag"
 	else
-		(( attributes & 0x2000 )) || echo "$target doesn't have expected S_DAX flag"
+		(( attributes & 0x00200000 )) || echo "$target doesn't have expected S_DAX flag"
 	fi
 }
 
-- 
2.28.0.rc0.12.gb6a658bd00c9