1 files changed, 86 insertions, 0 deletions
diff --git a/qa/workunits/fs/full/subvolume_snapshot_rm.sh b/qa/workunits/fs/full/subvolume_snapshot_rm.sh
new file mode 100755
index 000000000..f6d0add9f
--- /dev/null
+++ b/qa/workunits/fs/full/subvolume_snapshot_rm.sh
@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+set -ex
+
+# This testcase tests the  'ceph fs subvolume snapshot rm' when the osd is full.
+# The snapshot rm fails with 'MetadataMgrException: -28 (error in write)' and
+# truncates the config file of corresponding subvolume. Hence the subsequent
+# snapshot rm of the same snapshot fails with 'MetadataMgrException: -2 (section 'GLOBAL' does not exist)'
+# traceback.
+
+# The osd is of the size 1GB. The subvolume is created and 800MB file is written.
+# Then full-ratios are set below 500MB such that the osd is treated as full.
+# The subvolume snapshot is taken which succeeds as no extra space is required
+# for snapshot. Now, the removal of the snapshot fails with ENOSPACE as it
+# fails to remove the snapshot metadata set. The snapshot removal fails
+# but should not traceback and truncate the config file.
+
+set -e
+expect_failure() {
+	if "$@"; then return 1; else return 0; fi
+}
+
+ignore_failure() {
+	if "$@"; then return 0; else return 0; fi
+}
+
+ceph fs subvolume create cephfs sub_0
+subvol_path=$(ceph fs subvolume getpath cephfs sub_0 2>/dev/null)
+
+#For debugging
+echo "Before write"
+df $CEPH_MNT
+ceph osd df
+
+# Write 800MB file and set full ratio to around 200MB
+ignore_failure sudo dd if=/dev/urandom of=$CEPH_MNT$subvol_path/800MB_file-1 status=progress bs=1M count=800 conv=fdatasync
+
+ceph osd set-full-ratio 0.2
+ceph osd set-nearfull-ratio 0.16
+ceph osd set-backfillfull-ratio 0.18
+
+timeout=30
+while [ $timeout -gt 0 ]
+do
+  health=$(ceph health detail)
+  [[ $health = *"OSD_FULL"* ]] && echo "OSD is full" && break
+  echo "Wating for osd to be full: $timeout"
+  sleep 1
+  let "timeout-=1"
+done
+
+#Take snapshot
+ceph fs subvolume snapshot create cephfs sub_0 snap_0
+
+#Remove snapshot fails but should not throw traceback
+expect_failure ceph fs subvolume snapshot rm cephfs sub_0 snap_0 2>/tmp/error_${PID}_file
+cat /tmp/error_${PID}_file
+
+# No traceback should be found
+expect_failure grep "Traceback" /tmp/error_${PID}_file
+
+# Validate config file is not truncated and GLOBAL section exists
+sudo grep "GLOBAL" $CEPH_MNT/volumes/_nogroup/sub_0/.meta
+
+#For debugging
+echo "After write"
+df $CEPH_MNT
+ceph osd df
+
+# Snapshot removal with force option should succeed
+ceph fs subvolume snapshot rm cephfs sub_0 snap_0 --force
+
+#Cleanup from backend
+ignore_failure sudo rm -f /tmp/error_${PID}_file
+ignore_failure sudo rm -rf $CEPH_MNT/volumes/_nogroup/sub_0
+
+#Set the ratios back for other full tests to run
+ceph osd set-full-ratio 0.95
+ceph osd set-nearfull-ratio 0.95
+ceph osd set-backfillfull-ratio 0.95
+
+#After test
+echo "After test"
+df -h $CEPH_MNT
+ceph osd df
+
+echo OK