1 files changed, 141 insertions, 0 deletions
diff --git a/qa/workunits/rbd/krbd_stable_writes.sh b/qa/workunits/rbd/krbd_stable_writes.sh
new file mode 100755
index 000000000..d00e5fd04
--- /dev/null
+++ b/qa/workunits/rbd/krbd_stable_writes.sh
@@ -0,0 +1,141 @@
+#!/usr/bin/env bash
+
+set -ex
+
+function assert_dm() {
+    local name=$1
+    local val=$2
+
+    local devno
+    devno=$(sudo dmsetup info -c --noheadings -o Major,Minor $name)
+    grep -q $val /sys/dev/block/$devno/queue/stable_writes
+}
+
+function dmsetup_reload() {
+    local name=$1
+
+    local table
+    table=$(</dev/stdin)
+
+    sudo dmsetup suspend $name
+    echo "$table" | sudo dmsetup reload $name
+    sudo dmsetup resume $name
+}
+
+IMAGE_NAME="stable-writes-test"
+
+rbd create --size 1 $IMAGE_NAME
+DEV=$(sudo rbd map $IMAGE_NAME)
+
+fallocate -l 1M loopfile
+LOOP_DEV=$(sudo losetup -f --show loopfile)
+
+[[ $(blockdev --getsize64 $DEV) -eq 1048576 ]]
+grep -q 1 /sys/block/${DEV#/dev/}/queue/stable_writes
+
+rbd resize --size 2 $IMAGE_NAME
+[[ $(blockdev --getsize64 $DEV) -eq 2097152 ]]
+grep -q 1 /sys/block/${DEV#/dev/}/queue/stable_writes
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 0
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $DEV 0
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $LOOP_DEV 0
+1024 2048 error
+EOF
+assert_dm tbl 0
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $DEV 0
+1024 2048 error
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $LOOP_DEV 0
+1024 2048 linear $DEV 0
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $DEV 0
+1024 2048 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 0
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $LOOP_DEV 0
+1024 2048 linear $DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 0
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $DEV 0
+1024 2048 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $DEV 0
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+cat <<EOF | sudo dmsetup create tbl
+0 1024 linear $DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $DEV 0
+1024 2048 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 error
+1024 2048 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 0
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $DEV 0
+1024 2048 linear $LOOP_DEV 0
+EOF
+assert_dm tbl 1
+cat <<EOF | dmsetup_reload tbl
+0 1024 linear $DEV 0
+EOF
+assert_dm tbl 1
+sudo dmsetup remove tbl
+
+sudo losetup -d $LOOP_DEV
+rm loopfile
+
+sudo rbd unmap $DEV
+rbd rm $IMAGE_NAME
+
+echo OK