[PATCH 1/3] common: enable testing of realtime quota when supported

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

If the kernel advertises realtime quota support, test it.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 common/populate |    2 +-
 common/quota    |   12 ++++++------
 common/xfs      |   12 ++++++++++++
 3 files changed, 19 insertions(+), 7 deletions(-)


diff --git a/common/populate b/common/populate
index 1e51eedddc..538cbc86fc 100644
--- a/common/populate
+++ b/common/populate
@@ -240,7 +240,7 @@ _populate_xfs_qmount_option()
 	if [ ! -f /proc/fs/xfs/xqmstat ]; then
 		# No quota support
 		return
-	elif [ "${USE_EXTERNAL}" = "yes" ] && [ ! -z "${SCRATCH_RTDEV}" ]; then
+	elif [ "${USE_EXTERNAL}" = "yes" ] && [ ! -z "${SCRATCH_RTDEV}" ] && ! _xfs_supports_rtquota; then
 		# Quotas not supported on rt filesystems
 		return
 	elif [ -z "${XFS_QUOTA_PROG}" ]; then
diff --git a/common/quota b/common/quota
index 6b529bf4b4..565057d932 100644
--- a/common/quota
+++ b/common/quota
@@ -23,10 +23,10 @@ _require_quota()
 	if [ ! -f /proc/fs/xfs/xqmstat ]; then
 	    _notrun "Installed kernel does not support XFS quotas"
         fi
-	if [ "$USE_EXTERNAL" = yes -a ! -z "$TEST_RTDEV" ]; then
+	if [ "$USE_EXTERNAL" = yes ] && [ -n "$TEST_RTDEV" ] && ! _xfs_supports_rtquota; then
 	    _notrun "Quotas not supported on realtime test device"
 	fi
-	if [ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_RTDEV" ]; then
+	if [ "$USE_EXTERNAL" = yes ] && [ -n "$SCRATCH_RTDEV" ] && ! _xfs_supports_rtquota; then
 	    _notrun "Quotas not supported on realtime scratch device"
 	fi
 	;;
@@ -44,10 +44,10 @@ _require_xfs_quota()
 {
     $here/src/feature -q $TEST_DEV
     [ $? -ne 0 ] && _notrun "Installed kernel does not support XFS quota"
-    if [ "$USE_EXTERNAL" = yes -a ! -z "$TEST_RTDEV" ]; then
+    if [ "$USE_EXTERNAL" = yes ] && [ -n "$TEST_RTDEV" ] && ! _xfs_supports_rtquota; then
 	_notrun "Quotas not supported on realtime test device"
     fi
-    if [ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_RTDEV" ]; then
+    if [ "$USE_EXTERNAL" = yes ] && [ -n "$SCRATCH_RTDEV" ] && ! _xfs_supports_rtquota; then
 	_notrun "Quotas not supported on realtime scratch device"
     fi
     [ -n "$XFS_QUOTA_PROG" ] || _notrun "XFS quota user tools not installed"
@@ -153,8 +153,8 @@ _require_prjquota()
     fi
     $here/src/feature -P $_dev
     [ $? -ne 0 ] && _notrun "Installed kernel does not support project quotas"
-    if [ "$USE_EXTERNAL" = yes ]; then
-	if [ -n "$TEST_RTDEV" -o -n "$SCRATCH_RTDEV" ]; then
+    if [ "$FSTYP" = "xfs" ] && [ "$USE_EXTERNAL" = yes ]; then
+	if [ -n "$TEST_RTDEV" -o -n "$SCRATCH_RTDEV" ] && ! _xfs_supports_rtquota; then
 	    _notrun "Project quotas not supported on realtime filesystem"
 	fi
     fi
diff --git a/common/xfs b/common/xfs
index 69a0eb620c..56c4b20889 100644
--- a/common/xfs
+++ b/common/xfs
@@ -2194,3 +2194,15 @@ _scratch_find_rt_metadir_entry() {
 
 	return 1
 }
+
+_xfs_supports_rtquota() {
+	test "$FSTYP" = "xfs" || return 1
+
+	local xqmfile="/proc/fs/xfs/xqm"
+
+	test -e "$xqmfile" || modprobe xfs
+	test -e "$xqmfile" || return 1
+
+	local rtquota="$(cat "$xqmfile" | awk '{print $5}')"
+	test "$rtquota" = "1"
+}





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