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|
#!/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
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