[Qemu-devel] [PATCH 76/88] qcow2: Flushing the caches in qcow2_close may fail

[Michael Roth <mdroth@linux.vnet.ibm.com>]

From: Max Reitz <mreitz@redhat.com>

qcow2_cache_flush() may fail; if one of the caches failed to be flushed
successfully to disk in qcow2_close() the image should not be marked
clean, and we should emit a warning.

This breaks the (qcow2-specific) iotests 026, 071 and 089; change their
output accordingly.

Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 3b5e14c76a6bb142bf250ddf99e24a0ac8c7bc12)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 block/qcow2.c              |  19 +++++--
 tests/qemu-iotests/026.out | 120 +++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/071.out |   8 +++
 tests/qemu-iotests/089.out |   2 +
 4 files changed, 146 insertions(+), 3 deletions(-)

diff --git a/block/qcow2.c b/block/qcow2.c
index 68b0191..e3cc23c 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1275,10 +1275,23 @@ static void qcow2_close(BlockDriverState *bs)
     s->l1_table = NULL;
 
     if (!(bs->open_flags & BDRV_O_INCOMING)) {
-        qcow2_cache_flush(bs, s->l2_table_cache);
-        qcow2_cache_flush(bs, s->refcount_block_cache);
+        int ret1, ret2;
 
-        qcow2_mark_clean(bs);
+        ret1 = qcow2_cache_flush(bs, s->l2_table_cache);
+        ret2 = qcow2_cache_flush(bs, s->refcount_block_cache);
+
+        if (ret1) {
+            error_report("Failed to flush the L2 table cache: %s",
+                         strerror(-ret1));
+        }
+        if (ret2) {
+            error_report("Failed to flush the refcount block cache: %s",
+                         strerror(-ret2));
+        }
+
+        if (!ret1 && !ret2) {
+            qcow2_mark_clean(bs);
+        }
     }
 
     qcow2_cache_destroy(bs, s->l2_table_cache);
diff --git a/tests/qemu-iotests/026.out b/tests/qemu-iotests/026.out
index f7c78e7..ad84ac2 100644
--- a/tests/qemu-iotests/026.out
+++ b/tests/qemu-iotests/026.out
@@ -14,6 +14,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_update; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 1 leaked clusters were found on the image.
@@ -21,6 +23,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_update; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 1 leaked clusters were found on the image.
@@ -38,6 +42,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_update; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 1 leaked clusters were found on the image.
@@ -45,6 +51,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_update; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 1 leaked clusters were found on the image.
@@ -70,7 +78,11 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_load; errno: 5; imm: off; once: off; write 
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 read failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -78,7 +90,11 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_load; errno: 5; imm: off; once: off; write -b
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 read failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -102,7 +118,11 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_load; errno: 28; imm: off; once: off; write 
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 read failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -110,12 +130,17 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_load; errno: 28; imm: off; once: off; write -b
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 read failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 5; imm: off; once: on; write 
+Failed to flush the L2 table cache: Input/output error
 write failed: Input/output error
 
 127 leaked clusters were found on the image.
@@ -123,6 +148,7 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 5; imm: off; once: on; write -b
+Failed to flush the L2 table cache: Input/output error
 write failed: Input/output error
 
 127 leaked clusters were found on the image.
@@ -130,6 +156,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 127 leaked clusters were found on the image.
@@ -137,6 +165,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 127 leaked clusters were found on the image.
@@ -144,6 +174,7 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 28; imm: off; once: on; write 
+Failed to flush the L2 table cache: No space left on device
 write failed: No space left on device
 
 127 leaked clusters were found on the image.
@@ -151,6 +182,7 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 28; imm: off; once: on; write -b
+Failed to flush the L2 table cache: No space left on device
 write failed: No space left on device
 
 127 leaked clusters were found on the image.
@@ -158,6 +190,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 127 leaked clusters were found on the image.
@@ -165,6 +199,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_update; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 127 leaked clusters were found on the image.
@@ -182,11 +218,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_alloc.write; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_alloc.write; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 1 leaked clusters were found on the image.
@@ -204,11 +244,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_alloc.write; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l2_alloc.write; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 1 leaked clusters were found on the image.
@@ -226,11 +270,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: write_aio; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: write_aio; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -246,11 +294,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: write_aio; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: write_aio; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -266,11 +318,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_load; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_load; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -286,51 +342,67 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_load; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_load; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 5; imm: off; once: on; write 
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 5; imm: off; once: on; write -b
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 28; imm: off; once: on; write 
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 28; imm: off; once: on; write -b
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_update_part; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -346,11 +418,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -366,11 +442,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -386,11 +466,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: cluster_alloc; errno: 5; imm: off; once: off; write 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: cluster_alloc; errno: 5; imm: off; once: off; write -b
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -406,11 +490,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: cluster_alloc; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: cluster_alloc; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 
@@ -429,6 +517,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.hookup; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 55 leaked clusters were found on the image.
@@ -436,6 +526,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.hookup; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 251 leaked clusters were found on the image.
@@ -453,11 +545,15 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -473,6 +569,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 11 leaked clusters were found on the image.
@@ -480,6 +578,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write_blocks; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 23 leaked clusters were found on the image.
@@ -497,6 +597,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write_table; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 11 leaked clusters were found on the image.
@@ -504,6 +606,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.write_table; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 23 leaked clusters were found on the image.
@@ -521,6 +625,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.switch_table; errno: 28; imm: off; once: off; write 
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 11 leaked clusters were found on the image.
@@ -528,6 +634,8 @@ This means waste of disk space, but no harm to data.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: refblock_alloc.switch_table; errno: 28; imm: off; once: off; write -b
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 23 leaked clusters were found on the image.
@@ -543,6 +651,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.alloc_table; errno: 5; imm: off; once: off
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -553,6 +663,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.alloc_table; errno: 28; imm: off; once: off
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -563,6 +675,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.write_table; errno: 5; imm: off; once: off
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -573,6 +687,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.write_table; errno: 28; imm: off; once: off
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
@@ -583,6 +699,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.activate_table; errno: 5; imm: off; once: off
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 write failed: Input/output error
 
 96 leaked clusters were found on the image.
@@ -595,6 +713,8 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
 
 Event: l1_grow.activate_table; errno: 28; imm: off; once: off
+Failed to flush the L2 table cache: No space left on device
+Failed to flush the refcount block cache: No space left on device
 write failed: No space left on device
 
 96 leaked clusters were found on the image.
diff --git a/tests/qemu-iotests/071.out b/tests/qemu-iotests/071.out
index 5f840a9..0624581 100644
--- a/tests/qemu-iotests/071.out
+++ b/tests/qemu-iotests/071.out
@@ -30,10 +30,14 @@ blkverify: read sector_num=0 nb_sectors=4 contents mismatch in sector 0
 
 === Testing blkdebug through filename ===
 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 read failed: Input/output error
 
 === Testing blkdebug through file blockref ===
 
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 read failed: Input/output error
 
 === Testing blkdebug on existing block device ===
@@ -48,6 +52,8 @@ read failed: Input/output error
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
+qemu-system-x86_64: Failed to flush the L2 table cache: Input/output error
+qemu-system-x86_64: Failed to flush the refcount block cache: Input/output error
 
 
 === Testing blkverify on existing block device ===
@@ -86,5 +92,7 @@ read failed: Input/output error
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "SHUTDOWN"}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "ide1-cd0", "tray-open": true}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": "DEVICE_TRAY_MOVED", "data": {"device": "floppy0", "tray-open": true}}
+qemu-system-x86_64: Failed to flush the L2 table cache: Input/output error
+qemu-system-x86_64: Failed to flush the refcount block cache: Input/output error
 
 *** done
diff --git a/tests/qemu-iotests/089.out b/tests/qemu-iotests/089.out
index 4ca2f88..ab06c55 100644
--- a/tests/qemu-iotests/089.out
+++ b/tests/qemu-iotests/089.out
@@ -24,6 +24,8 @@ read 512/512 bytes at offset 0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 
 wrote 512/512 bytes at offset 229376
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+Failed to flush the L2 table cache: Input/output error
+Failed to flush the refcount block cache: Input/output error
 read failed: Input/output error
 
 === Testing qemu-img info output ===
-- 
1.9.1