From: Ira Weiny <ira.weiny@xxxxxxxxx> There is a conflict with the user visible statx bits 'mount root' and 'dax'. The kernel is changing the dax bit to correct this conflict.[1] Adjust _check_s_dax() to use the new bit. Because DAX tests do not run on root mounts, STATX_ATTR_MOUNT_ROOT should always be 0, therefore we can allow either bit to indicate DAX and cover any kernel which may be running. [1] https://lore.kernel.org/lkml/3e28d2c7-fbe5-298a-13ba-dcd8fd504666@xxxxxxxxxx/ Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx> --- I went ahead and used Christoph's suggestion regarding using both bits. --- common/rc | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/common/rc b/common/rc index b5a504e0dcb4..322e682e5239 100644 --- a/common/rc +++ b/common/rc @@ -3221,11 +3221,24 @@ _check_s_dax() local exp_s_dax=$2 local attributes=$($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" - else - (( attributes & 0x2000 )) || echo "$target doesn't have expected S_DAX flag" - fi + + # The attribute bit value, STATX_ATTR_DAX (0x2000), conflicted with + # STATX_ATTR_MOUNT_ROOT. Therefore, STATX_ATTR_DAX was changed to + # 0x00200000. + # + # Because DAX tests do not run on root mounts, STATX_ATTR_MOUNT_ROOT + # should always be 0, therefore we can allow either bit to indicate DAX + # and cover any kernel which may be running. + + if [ $(( attributes & 0x00200000 )) -ne 0 ] || [ $(( attributes & 0x2000 )) -ne 0 ]; then + if [ $exp_s_dax -eq 0 ]; then + echo "$target has unexpected S_DAX flag" + fi + else + if [ $exp_s_dax -ne 0 ]; then + echo "$target doesn't have expected S_DAX flag" + fi + fi } _check_xflag() -- 2.28.0.rc0.12.gb6a658bd00c9
