From 5224a218bb3c5c7868061c4f132f583fdf16818e Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Wed, 28 Feb 2018 11:36:40 +0100
Subject: [PATCH] qa: krbd parent-overlap test

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 qa/rbd/krbd_parent_overlap.t                  | 64 +++++++++++++++++++
 .../krbd/basic/tasks/krbd_parent_overlap.yaml |  5 ++
 2 files changed, 69 insertions(+)
 create mode 100644 qa/rbd/krbd_parent_overlap.t
 create mode 100644 qa/suites/krbd/basic/tasks/krbd_parent_overlap.yaml

diff --git a/qa/rbd/krbd_parent_overlap.t b/qa/rbd/krbd_parent_overlap.t
new file mode 100644
index 000000000000..47deda90e4b9
--- /dev/null
+++ b/qa/rbd/krbd_parent_overlap.t
@@ -0,0 +1,64 @@
+
+For reads, only the object extent needs to be reverse mapped:
+
+  $ rbd create --size 20M img
+  $ DEV=$(sudo rbd map img)
+  $ xfs_io -c 'pwrite 0 20M' $DEV >/dev/null
+  $ sudo rbd unmap $DEV
+  $ rbd snap create img@snap
+  $ rbd snap protect img@snap
+  $ rbd clone img@snap cloneimg
+  $ rbd resize --no-progress --size 5M --allow-shrink cloneimg
+  $ rbd resize --no-progress --size 20M cloneimg
+  $ DEV=$(sudo rbd map cloneimg)
+  $ hexdump $DEV
+  0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
+  *
+  0500000 0000 0000 0000 0000 0000 0000 0000 0000
+  *
+  1400000
+  $ sudo rbd unmap $DEV
+  $ rbd rm --no-progress cloneimg
+  $ rbd snap unprotect img@snap
+  $ rbd snap rm --no-progress img@snap
+  $ rbd rm --no-progress img
+
+For writes, the entire object needs to be reverse mapped:
+
+  $ rbd create --size 2M img
+  $ DEV=$(sudo rbd map img)
+  $ xfs_io -c 'pwrite 0 1M' $DEV >/dev/null
+  $ sudo rbd unmap $DEV
+  $ rbd snap create img@snap
+  $ rbd snap protect img@snap
+  $ rbd clone img@snap cloneimg
+  $ rbd resize --no-progress --size 8M cloneimg
+  $ DEV=$(sudo rbd map cloneimg)
+  $ xfs_io -c 'pwrite -S 0xef 3M 1M' $DEV >/dev/null
+  $ hexdump $DEV
+  0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
+  *
+  0100000 0000 0000 0000 0000 0000 0000 0000 0000
+  *
+  0300000 efef efef efef efef efef efef efef efef
+  *
+  0400000 0000 0000 0000 0000 0000 0000 0000 0000
+  *
+  0800000
+  $ sudo rbd unmap $DEV
+  $ DEV=$(sudo rbd map cloneimg)
+  $ hexdump $DEV
+  0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd
+  *
+  0100000 0000 0000 0000 0000 0000 0000 0000 0000
+  *
+  0300000 efef efef efef efef efef efef efef efef
+  *
+  0400000 0000 0000 0000 0000 0000 0000 0000 0000
+  *
+  0800000
+  $ sudo rbd unmap $DEV
+  $ rbd rm --no-progress cloneimg
+  $ rbd snap unprotect img@snap
+  $ rbd snap rm --no-progress img@snap
+  $ rbd rm --no-progress img
diff --git a/qa/suites/krbd/basic/tasks/krbd_parent_overlap.yaml b/qa/suites/krbd/basic/tasks/krbd_parent_overlap.yaml
new file mode 100644
index 000000000000..c7d38572691a
--- /dev/null
+++ b/qa/suites/krbd/basic/tasks/krbd_parent_overlap.yaml
@@ -0,0 +1,5 @@
+tasks:
+- cram:
+    clients:
+      client.0:
+      - http://git.ceph.com/?p={repo};a=blob_plain;hb={branch};f=qa/rbd/krbd_parent_overlap.t
-- 
2.47.3