iotests: Test multiple blockdev-snapshot calls

Test that doing a second blockdev-snapshot doesn't make the first
overlay's backing file go away.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

1 files changed, 337 insertions, 0 deletions

diff --git a/tests/qemu-iotests/273.out b/tests/qemu-iotests/273.out
new file mode 100644
index 0000000000..c410fee5c4
--- /dev/null
+++ b/tests/qemu-iotests/273.out
@@ -0,0 +1,337 @@
+QA output created by 273
+Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
+Formatting 'TEST_DIR/t.IMGFMT.mid', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.mid
+Testing: -blockdev file,node-name=base,filename=TEST_DIR/t.IMGFMT.base -blockdev file,node-name=midf,filename=TEST_DIR/t.IMGFMT.mid -blockdev {"driver":"IMGFMT","node-name":"mid","file":"midf","backing":null} -blockdev file,node-name=topf,filename=TEST_DIR/t.IMGFMT -blockdev {"driver":"IMGFMT","file":"topf","node-name":"top","backing":null}
+{
+    QMP_VERSION
+}
+{
+    "return": {
+    }
+}
+{
+    "return": {
+    }
+}
+{
+    "return": {
+    }
+}
+{
+    "return": [
+        {
+            "iops_rd": 0,
+            "detect_zeroes": "off",
+            "image": {
+                "backing-image": {
+                    "backing-image": {
+                        "virtual-size": 197120,
+                        "filename": "TEST_DIR/t.IMGFMT.base",
+                        "format": "file",
+                        "actual-size": SIZE,
+                        "dirty-flag": false
+                    },
+                    "backing-filename-format": "file",
+                    "virtual-size": 67108864,
+                    "filename": "TEST_DIR/t.IMGFMT.mid",
+                    "cluster-size": 65536,
+                    "format": "IMGFMT",
+                    "actual-size": SIZE,
+                    "format-specific": {
+                        "type": "IMGFMT",
+                        "data": {
+                            "compat": "1.1",
+                            "lazy-refcounts": false,
+                            "refcount-bits": 16,
+                            "corrupt": false
+                        }
+                    },
+                    "full-backing-filename": "TEST_DIR/t.IMGFMT.base",
+                    "backing-filename": "TEST_DIR/t.IMGFMT.base",
+                    "dirty-flag": false
+                },
+                "backing-filename-format": "IMGFMT",
+                "virtual-size": 67108864,
+                "filename": "TEST_DIR/t.IMGFMT",
+                "cluster-size": 65536,
+                "format": "IMGFMT",
+                "actual-size": SIZE,
+                "format-specific": {
+                    "type": "IMGFMT",
+                    "data": {
+                        "compat": "1.1",
+                        "lazy-refcounts": false,
+                        "refcount-bits": 16,
+                        "corrupt": false
+                    }
+                },
+                "full-backing-filename": "TEST_DIR/t.IMGFMT.mid",
+                "backing-filename": "TEST_DIR/t.IMGFMT.mid",
+                "dirty-flag": false
+            },
+            "iops_wr": 0,
+            "ro": false,
+            "node-name": "top",
+            "backing_file_depth": 2,
+            "drv": "IMGFMT",
+            "iops": 0,
+            "bps_wr": 0,
+            "write_threshold": 0,
+            "backing_file": "TEST_DIR/t.IMGFMT.mid",
+            "encrypted": false,
+            "bps": 0,
+            "bps_rd": 0,
+            "cache": {
+                "no-flush": false,
+                "direct": false,
+                "writeback": true
+            },
+            "file": "TEST_DIR/t.IMGFMT",
+            "encryption_key_missing": false
+        },
+        {
+            "iops_rd": 0,
+            "detect_zeroes": "off",
+            "image": {
+                "virtual-size": 197120,
+                "filename": "TEST_DIR/t.IMGFMT",
+                "format": "file",
+                "actual-size": SIZE,
+                "dirty-flag": false
+            },
+            "iops_wr": 0,
+            "ro": false,
+            "node-name": "topf",
+            "backing_file_depth": 0,
+            "drv": "file",
+            "iops": 0,
+            "bps_wr": 0,
+            "write_threshold": 0,
+            "encrypted": false,
+            "bps": 0,
+            "bps_rd": 0,
+            "cache": {
+                "no-flush": false,
+                "direct": false,
+                "writeback": true
+            },
+            "file": "TEST_DIR/t.IMGFMT",
+            "encryption_key_missing": false
+        },
+        {
+            "iops_rd": 0,
+            "detect_zeroes": "off",
+            "image": {
+                "backing-image": {
+                    "virtual-size": 197120,
+                    "filename": "TEST_DIR/t.IMGFMT.base",
+                    "format": "file",
+                    "actual-size": SIZE,
+                    "dirty-flag": false
+                },
+                "backing-filename-format": "file",
+                "virtual-size": 67108864,
+                "filename": "TEST_DIR/t.IMGFMT.mid",
+                "cluster-size": 65536,
+                "format": "IMGFMT",
+                "actual-size": SIZE,
+                "format-specific": {
+                    "type": "IMGFMT",
+                    "data": {
+                        "compat": "1.1",
+                        "lazy-refcounts": false,
+                        "refcount-bits": 16,
+                        "corrupt": false
+                    }
+                },
+                "full-backing-filename": "TEST_DIR/t.IMGFMT.base",
+                "backing-filename": "TEST_DIR/t.IMGFMT.base",
+                "dirty-flag": false
+            },
+            "iops_wr": 0,
+            "ro": true,
+            "node-name": "mid",
+            "backing_file_depth": 1,
+            "drv": "IMGFMT",
+            "iops": 0,
+            "bps_wr": 0,
+            "write_threshold": 0,
+            "backing_file": "TEST_DIR/t.IMGFMT.base",
+            "encrypted": false,
+            "bps": 0,
+            "bps_rd": 0,
+            "cache": {
+                "no-flush": false,
+                "direct": false,
+                "writeback": true
+            },
+            "file": "TEST_DIR/t.IMGFMT.mid",
+            "encryption_key_missing": false
+        },
+        {
+            "iops_rd": 0,
+            "detect_zeroes": "off",
+            "image": {
+                "virtual-size": 197120,
+                "filename": "TEST_DIR/t.IMGFMT.mid",
+                "format": "file",
+                "actual-size": SIZE,
+                "dirty-flag": false
+            },
+            "iops_wr": 0,
+            "ro": false,
+            "node-name": "midf",
+            "backing_file_depth": 0,
+            "drv": "file",
+            "iops": 0,
+            "bps_wr": 0,
+            "write_threshold": 0,
+            "encrypted": false,
+            "bps": 0,
+            "bps_rd": 0,
+            "cache": {
+                "no-flush": false,
+                "direct": false,
+                "writeback": true
+            },
+            "file": "TEST_DIR/t.IMGFMT.mid",
+            "encryption_key_missing": false
+        },
+        {
+            "iops_rd": 0,
+            "detect_zeroes": "off",
+            "image": {
+                "virtual-size": 197120,
+                "filename": "TEST_DIR/t.IMGFMT.base",
+                "format": "file",
+                "actual-size": SIZE,
+                "dirty-flag": false
+            },
+            "iops_wr": 0,
+            "ro": true,
+            "node-name": "base",
+            "backing_file_depth": 0,
+            "drv": "file",
+            "iops": 0,
+            "bps_wr": 0,
+            "write_threshold": 0,
+            "encrypted": false,
+            "bps": 0,
+            "bps_rd": 0,
+            "cache": {
+                "no-flush": false,
+                "direct": false,
+                "writeback": true
+            },
+            "file": "TEST_DIR/t.IMGFMT.base",
+            "encryption_key_missing": false
+        }
+    ]
+}
+{
+    "return": {
+        "edges": [
+            {
+                "name": "file",
+                "parent": 5,
+                "shared-perm": [
+                    "graph-mod",
+                    "write-unchanged",
+                    "consistent-read"
+                ],
+                "perm": [
+                    "resize",
+                    "write",
+                    "consistent-read"
+                ],
+                "child": 4
+            },
+            {
+                "name": "backing",
+                "parent": 5,
+                "shared-perm": [
+                    "graph-mod",
+                    "resize",
+                    "write-unchanged",
+                    "write",
+                    "consistent-read"
+                ],
+                "perm": [
+                ],
+                "child": 3
+            },
+            {
+                "name": "file",
+                "parent": 3,
+                "shared-perm": [
+                    "graph-mod",
+                    "write-unchanged",
+                    "consistent-read"
+                ],
+                "perm": [
+                    "consistent-read"
+                ],
+                "child": 2
+            },
+            {
+                "name": "backing",
+                "parent": 3,
+                "shared-perm": [
+                    "graph-mod",
+                    "resize",
+                    "write-unchanged",
+                    "write",
+                    "consistent-read"
+                ],
+                "perm": [
+                ],
+                "child": 1
+            }
+        ],
+        "nodes": [
+            {
+                "name": "top",
+                "type": "block-driver",
+                "id": 5
+            },
+            {
+                "name": "topf",
+                "type": "block-driver",
+                "id": 4
+            },
+            {
+                "name": "mid",
+                "type": "block-driver",
+                "id": 3
+            },
+            {
+                "name": "midf",
+                "type": "block-driver",
+                "id": 2
+            },
+            {
+                "name": "base",
+                "type": "block-driver",
+                "id": 1
+            }
+        ]
+    }
+}
+{
+    "return": {
+    }
+}
+{
+    "timestamp": {
+        "seconds":  TIMESTAMP,
+        "microseconds":  TIMESTAMP
+    },
+    "event": "SHUTDOWN",
+    "data": {
+        "guest": false,
+        "reason": "host-qmp-quit"
+    }
+}
+
+*** done