[ndctl] test: blk allocation exhaustion

Commit Message

Dan Williams April 1, 2017, 7:28 p.m. UTC

Test that the kernel properly accounts for all blk allocations when all
aliased pmem is allocated before un-aliased blk. This targets a
regression that was introduced with commit a1f3e4d6a0c3 ("libnvdimm,
region: update nd_region_available_dpa() for multi-pmem support").

Cc: Dave Jiang <[e-mail]>
Signed-off-by: Dan Williams <[e-mail]>
---
 test/Makefile.am    |    3 ++-
 test/blk-exhaust.sh |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100755 test/blk-exhaust.sh

Patch

diff --git a/test/Makefile.am b/test/Makefile.am
index d2a0cf9fe2ba..4567f7465ebd 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -10,7 +10,8 @@  TESTS =\
 	clear.sh \
 	dax-errors.sh \
 	btt-check.sh \
-	label-compat.sh
+	label-compat.sh \
+	blk-exhaust.sh
 
 check_PROGRAMS =\
 	libndctl \
diff --git a/test/blk-exhaust.sh b/test/blk-exhaust.sh
new file mode 100755
index 000000000000..24a1ec216767
--- /dev/null
+++ b/test/blk-exhaust.sh
@@ -0,0 +1,47 @@ 
+#!/bin/bash -x
+NDCTL="../ndctl/ndctl"
+BUS="-b nfit_test.0"
+BUS1="-b nfit_test.1"
+rc=77
+
+set -e
+
+err() {
+	echo "test/label-compat.sh: failed at line $1"
+	exit $rc
+}
+
+check_min_kver()
+{
+	local ver="$1"
+	: "${KVER:=$(uname -r)}"
+
+	[ -n "$ver" ] || return 1
+	[[ "$ver" == "$(echo -e "$ver\n$KVER" | sort -V | head -1)" ]]
+}
+
+check_min_kver "4.11" || { echo "kernel $KVER may lack blk-exhaustion fix"; exit $rc; }
+
+set -e
+trap 'err $LINENO' ERR
+
+# setup (reset nfit_test dimms)
+modprobe nfit_test
+$NDCTL disable-region $BUS all
+$NDCTL zero-labels $BUS all
+$NDCTL enable-region $BUS all
+
+# if the kernel accounting is correct we should be able to create two
+# pmem and two blk namespaces on nfit_test.0
+rc=1
+$NDCTL create-namespace $BUS -t pmem
+$NDCTL create-namespace $BUS -t pmem
+$NDCTL create-namespace $BUS -t blk -m raw
+$NDCTL create-namespace $BUS -t blk -m raw
+
+# clearnup and exit
+$NDCTL disable-region $BUS all
+$NDCTL disable-region $BUS1 all
+modprobe -r nfit_test
+
+exit 0