14 files changed, 196 insertions, 89 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index d26141277d..1c30dfa993 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -985,6 +985,7 @@ F: tests/intel-hda-test.c
 
 Block layer core
 M: Kevin Wolf <kwolf@redhat.com>
+M: Max Reitz <mreitz@redhat.com>
 L: qemu-block@nongnu.org
 S: Supported
 F: block*
@@ -1569,6 +1570,7 @@ F: block/win32-aio.c
 
 qcow2
 M: Kevin Wolf <kwolf@redhat.com>
+M: Max Reitz <mreitz@redhat.com>
 L: qemu-block@nongnu.org
 S: Supported
 F: block/qcow2*
@@ -1581,6 +1583,7 @@ F: block/qcow.c
 
 blkdebug
 M: Kevin Wolf <kwolf@redhat.com>
+M: Max Reitz <mreitz@redhat.com>
 L: qemu-block@nongnu.org
 S: Supported
 F: block/blkdebug.c
diff --git a/block/qcow2.c b/block/qcow2.c
index 056525c7fd..470734be9f 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1986,6 +1986,10 @@ static int qcow2_change_backing_file(BlockDriverState *bs,
 {
     BDRVQcow2State *s = bs->opaque;
 
+    if (backing_file && strlen(backing_file) > 1023) {
+        return -EINVAL;
+    }
+
     pstrcpy(bs->backing_file, sizeof(bs->backing_file), backing_file ?: "");
     pstrcpy(bs->backing_format, sizeof(bs->backing_format), backing_fmt ?: "");
 
diff --git a/block/vpc.c b/block/vpc.c
index 8830b5b2b0..3713ec3a5f 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -775,7 +775,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf,
     num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512);
 
     ret = blk_pwrite(blk, offset, buf, HEADER_SIZE);
-    if (ret) {
+    if (ret < 0) {
         goto fail;
     }
 
diff --git a/qemu-img.c b/qemu-img.c
index 06264d9128..1697762606 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -37,6 +37,7 @@
 #include "block/block_int.h"
 #include "block/blockjob.h"
 #include "block/qapi.h"
+#include "crypto/init.h"
 #include <getopt.h>
 
 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \
@@ -256,7 +257,7 @@ static BlockBackend *img_open_opts(const char *optstr,
     options = qemu_opts_to_qdict(opts, NULL);
     blk = blk_new_open(NULL, NULL, options, flags, &local_err);
     if (!blk) {
-        error_reportf_err(local_err, "Could not open '%s'", optstr);
+        error_reportf_err(local_err, "Could not open '%s': ", optstr);
         return NULL;
     }
     blk_set_enable_write_cache(blk, !writethrough);
@@ -3486,6 +3487,11 @@ int main(int argc, char **argv)
         exit(EXIT_FAILURE);
     }
 
+    if (qcrypto_init(&local_error) < 0) {
+        error_reportf_err(local_error, "cannot initialize crypto: ");
+        exit(1);
+    }
+
     module_call_init(MODULE_INIT_QOM);
     bdrv_init();
     if (argc < 2) {
diff --git a/qemu-io.c b/qemu-io.c
index 0a738f12f0..288bba84b9 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -23,6 +23,7 @@
 #include "sysemu/block-backend.h"
 #include "block/block_int.h"
 #include "trace/control.h"
+#include "crypto/init.h"
 
 #define CMD_NOFILE_OK   0x01
 
@@ -443,6 +444,11 @@ int main(int argc, char **argv)
     progname = basename(argv[0]);
     qemu_init_exec_dir(argv[0]);
 
+    if (qcrypto_init(&local_error) < 0) {
+        error_reportf_err(local_error, "cannot initialize crypto: ");
+        exit(1);
+    }
+
     module_call_init(MODULE_INIT_QOM);
     qemu_add_opts(&qemu_object_opts);
     bdrv_init();
diff --git a/qemu-nbd.c b/qemu-nbd.c
index c2e4d3f64c..b5751f853b 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -31,6 +31,7 @@
 #include "qapi/qmp/qstring.h"
 #include "qom/object_interfaces.h"
 #include "io/channel-socket.h"
+#include "crypto/init.h"
 
 #include <getopt.h>
 #include <libgen.h>
@@ -519,6 +520,12 @@ int main(int argc, char **argv)
     memset(&sa_sigterm, 0, sizeof(sa_sigterm));
     sa_sigterm.sa_handler = termsig_handler;
     sigaction(SIGTERM, &sa_sigterm, NULL);
+
+    if (qcrypto_init(&local_err) < 0) {
+        error_reportf_err(local_err, "cannot initialize crypto: ");
+        exit(1);
+    }
+
     module_call_init(MODULE_INIT_QOM);
     qemu_add_opts(&qemu_object_opts);
     qemu_init_exec_dir(argv[0]);
diff --git a/tests/qemu-iotests/026.out.nocache b/tests/qemu-iotests/026.out.nocache
index a5000d5c8b..9c2c8a9486 100644
--- a/tests/qemu-iotests/026.out.nocache
+++ b/tests/qemu-iotests/026.out.nocache
@@ -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 
@@ -110,7 +130,11 @@ 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 
@@ -118,20 +142,18 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_update; errno: 5; imm: off; once: on; write 
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-127 leaked clusters were found on the image.
-This means waste of disk space, but no harm to data.
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
+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 -b
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-127 leaked clusters were found on the image.
-This means waste of disk space, but no harm to data.
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
+No errors were found on the image.
+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
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
@@ -140,6 +162,8 @@ 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
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
@@ -150,20 +174,18 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 Event: l2_update; errno: 28; imm: off; once: on; write 
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-127 leaked clusters were found on the image.
-This means waste of disk space, but no harm to data.
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
+No errors were found on the image.
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
 
 Event: l2_update; errno: 28; imm: off; once: on; write -b
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-
-127 leaked clusters were found on the image.
-This means waste of disk space, but no harm to data.
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824 
+No errors were found on the image.
+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
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
@@ -172,6 +194,8 @@ 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
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
@@ -190,11 +214,15 @@ 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.
@@ -212,11 +240,15 @@ 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.
@@ -234,11 +266,15 @@ 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 
@@ -254,11 +290,15 @@ 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 
@@ -274,11 +314,15 @@ 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 
@@ -294,11 +338,15 @@ 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 
@@ -314,11 +362,15 @@ 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 
@@ -334,11 +386,15 @@ 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 
@@ -354,11 +410,15 @@ 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 
@@ -374,11 +434,15 @@ 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 
@@ -394,11 +458,15 @@ 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 
@@ -414,11 +482,15 @@ 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.
 
@@ -437,6 +509,8 @@ 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.
@@ -444,6 +518,8 @@ 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.
@@ -461,11 +537,15 @@ 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 
@@ -481,13 +561,17 @@ 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
 
-10 leaked clusters were found on the image.
+11 leaked clusters were found on the image.
 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.
@@ -505,13 +589,17 @@ 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
 
-10 leaked clusters were found on the image.
+11 leaked clusters were found on the image.
 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.
@@ -529,13 +617,17 @@ 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
 
-10 leaked clusters were found on the image.
+11 leaked clusters were found on the image.
 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.
@@ -551,6 +643,8 @@ 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 
@@ -561,6 +655,8 @@ 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 
@@ -571,6 +667,8 @@ 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 
@@ -581,6 +679,8 @@ 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 
@@ -591,6 +691,8 @@ 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.
@@ -603,6 +705,8 @@ 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/051.out b/tests/qemu-iotests/051.out
index c1291ff317..408d613bc1 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -145,7 +145,7 @@ QEMU X.Y.Z monitor - type 'help' for more information
 Testing: -drive driver=null-co,cache=invalid_value
 QEMU_PROG: -drive driver=null-co,cache=invalid_value: invalid cache option
 
-Testing: -drive file=TEST_DIR/t.qcow2,cache=writeback,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.cache.writeback=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
+Testing: -drive file=TEST_DIR/t.qcow2,cache=writeback,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) i[K[Din[K[D[Dinf[K[D[D[Dinfo[K[D[D[D[Dinfo [K[D[D[D[D[Dinfo b[K[D[D[D[D[D[Dinfo bl[K[D[D[D[D[D[D[Dinfo blo[K[D[D[D[D[D[D[D[Dinfo bloc[K[D[D[D[D[D[D[D[D[Dinfo block[K
 drive0 (NODE_NAME): TEST_DIR/t.qcow2 (qcow2)
@@ -165,7 +165,7 @@ backing-file: TEST_DIR/t.qcow2.base (file, read-only)
     Cache mode:       writeback, ignore flushes
 (qemu) q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
 
-Testing: -drive file=TEST_DIR/t.qcow2,cache=writethrough,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.cache.writeback=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
+Testing: -drive file=TEST_DIR/t.qcow2,cache=writethrough,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) i[K[Din[K[D[Dinf[K[D[D[Dinfo[K[D[D[D[Dinfo [K[D[D[D[D[Dinfo b[K[D[D[D[D[D[Dinfo bl[K[D[D[D[D[D[D[Dinfo blo[K[D[D[D[D[D[D[D[Dinfo bloc[K[D[D[D[D[D[D[D[D[Dinfo block[K
 drive0 (NODE_NAME): TEST_DIR/t.qcow2 (qcow2)
@@ -185,7 +185,7 @@ backing-file: TEST_DIR/t.qcow2.base (file, read-only)
     Cache mode:       writeback, ignore flushes
 (qemu) q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
 
-Testing: -drive file=TEST_DIR/t.qcow2,cache=unsafe,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.cache.writeback=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
+Testing: -drive file=TEST_DIR/t.qcow2,cache=unsafe,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) i[K[Din[K[D[Dinf[K[D[D[Dinfo[K[D[D[D[Dinfo [K[D[D[D[D[Dinfo b[K[D[D[D[D[D[Dinfo bl[K[D[D[D[D[D[D[Dinfo blo[K[D[D[D[D[D[D[D[Dinfo bloc[K[D[D[D[D[D[D[D[D[Dinfo block[K
 drive0 (NODE_NAME): TEST_DIR/t.qcow2 (qcow2)
@@ -205,8 +205,8 @@ backing-file: TEST_DIR/t.qcow2.base (file, read-only)
     Cache mode:       writeback, ignore flushes
 (qemu) q[K[Dqu[K[D[Dqui[K[D[D[Dquit[K
 
-Testing: -drive file=TEST_DIR/t.qcow2,cache=invalid_value,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.cache.writeback=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
-QEMU_PROG: -drive file=TEST_DIR/t.qcow2,cache=invalid_value,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.cache.writeback=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0: invalid cache option
+Testing: -drive file=TEST_DIR/t.qcow2,cache=invalid_value,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0 -nodefaults
+QEMU_PROG: -drive file=TEST_DIR/t.qcow2,cache=invalid_value,backing.file.filename=TEST_DIR/t.qcow2.base,backing.cache.no-flush=on,backing.node-name=backing,backing.file.node-name=backing-file,file.node-name=file,if=none,id=drive0: invalid cache option
 
 
 === Specifying the protocol layer ===
diff --git a/tests/qemu-iotests/068 b/tests/qemu-iotests/068
index 58d1d80e78..7562dd77ee 100755
--- a/tests/qemu-iotests/068
+++ b/tests/qemu-iotests/068
@@ -53,7 +53,7 @@ _make_test_img $IMG_SIZE
 
 case "$QEMU_DEFAULT_MACHINE" in
   s390-ccw-virtio)
-      platform_parm="-no-shutdown -machine accel=kvm"
+      platform_parm="-no-shutdown"
       ;;
   *)
       platform_parm=""
diff --git a/tests/qemu-iotests/148 b/tests/qemu-iotests/148
index d066ec3e41..e01b061fe7 100644
--- a/tests/qemu-iotests/148
+++ b/tests/qemu-iotests/148
@@ -79,9 +79,6 @@ sector = "%d"
                 self.assert_qmp(event, 'data/sector-num', sector)
 
     def testQuorum(self):
-        if not 'quorum' in iotests.qemu_img_pipe('--help'):
-            return
-
         # Generate an error and get an event
         self.vm.hmp_qemu_io("drive0", "aio_read %d %d" %
                             (offset * sector_size, sector_size))
@@ -139,4 +136,5 @@ class TestFifoQuorumEvents(TestQuorumEvents):
     read_pattern = 'fifo'
 
 if __name__ == '__main__':
+    iotests.verify_quorum()
     iotests.main(supported_fmts=["raw"])
diff --git a/tests/qemu-iotests/150 b/tests/qemu-iotests/150
index 97d2a35bfc..665373deb0 100755
--- a/tests/qemu-iotests/150
+++ b/tests/qemu-iotests/150
@@ -38,65 +38,34 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 . ./common.rc
 . ./common.filter
 
-_supported_fmt generic
+_supported_fmt raw qcow2
 _supported_proto file
 _supported_os Linux
 
 
-on_disk_size()
-{
-    du "$@" | sed -e 's/\t\+.*//'
-}
-
-
 img_size=1048576
 
 
 echo
-echo '=== Comparing empty image against sparse conversion ==='
+echo '=== Mapping sparse conversion ==='
 echo
 
-_make_test_img $img_size
-
-empty_size=$(on_disk_size "$TEST_IMG")
-
-
 $QEMU_IMG_PROG convert -O "$IMGFMT" -S 512 \
     "json:{ 'driver': 'null-co', 'size': $img_size, 'read-zeroes': true }" \
     "$TEST_IMG"
 
-sparse_convert_size=$(on_disk_size "$TEST_IMG")
-
-
-if [ "$empty_size" -eq "$sparse_convert_size" ]; then
-    echo 'Equal image size'
-else
-    echo 'Different image size'
-fi
+$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
 
 
 echo
-echo '=== Comparing full image against non-sparse conversion ==='
+echo '=== Mapping non-sparse conversion ==='
 echo
 
-_make_test_img $img_size
-$QEMU_IO -c "write 0 $img_size" "$TEST_IMG" | _filter_qemu_io
-
-full_size=$(on_disk_size "$TEST_IMG")
-
-
 $QEMU_IMG convert -O "$IMGFMT" -S 0 \
     "json:{ 'driver': 'null-co', 'size': $img_size, 'read-zeroes': true }" \
     "$TEST_IMG"
 
-non_sparse_convert_size=$(on_disk_size "$TEST_IMG")
-
-
-if [ "$full_size" -eq "$non_sparse_convert_size" ]; then
-    echo 'Equal image size'
-else
-    echo 'Different image size'
-fi
+$QEMU_IMG map "$TEST_IMG" | _filter_qemu_img_map
 
 
 # success, all done
diff --git a/tests/qemu-iotests/150.out b/tests/qemu-iotests/150.out
index 2d29da13e7..2a54e8dcfa 100644
--- a/tests/qemu-iotests/150.out
+++ b/tests/qemu-iotests/150.out
@@ -1,14 +1,11 @@
 QA output created by 150
 
-=== Comparing empty image against sparse conversion ===
+=== Mapping sparse conversion ===
 
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
-Equal image size
+Offset          Length          File
 
-=== Comparing full image against non-sparse conversion ===
+=== Mapping non-sparse conversion ===
 
-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
-wrote 1048576/1048576 bytes at offset 0
-1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-Equal image size
+Offset          Length          File
+0               0x100000        TEST_DIR/t.IMGFMT
 *** done
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index c350f16b6a..4cba2151e4 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -19,7 +19,6 @@
 # Control script for QA
 #
 
-tmp=/tmp/$$
 status=0
 needwrap=true
 try=0
@@ -130,6 +129,8 @@ fi
 #    exit 1
 #fi
 
+tmp="${TEST_DIR}"/$$
+
 _wallclock()
 {
     date "+%H %M %S" | $AWK_PROG '{ print $1*3600 + $2*60 + $3 }'
@@ -146,8 +147,8 @@ _wrapup()
     # for hangcheck ...
     # remove files that were used by hangcheck
     #
-    [ -f /tmp/check.pid ] && rm -rf /tmp/check.pid
-    [ -f /tmp/check.sts ] && rm -rf /tmp/check.sts
+    [ -f "${TEST_DIR}"/check.pid ] && rm -rf "${TEST_DIR}"/check.pid
+    [ -f "${TEST_DIR}"/check.sts ] && rm -rf "${TEST_DIR}"/check.sts
 
     if $showme
     then
@@ -197,8 +198,8 @@ END        { if (NR > 0) {
         needwrap=false
     fi
 
-    rm -f /tmp/*.out /tmp/*.err /tmp/*.time
-    rm -f /tmp/check.pid /tmp/check.sts
+    rm -f "${TEST_DIR}"/*.out "${TEST_DIR}"/*.err "${TEST_DIR}"/*.time
+    rm -f "${TEST_DIR}"/check.pid "${TEST_DIR}"/check.sts
     rm -f $tmp.*
 }
 
@@ -208,16 +209,16 @@ trap "_wrapup; exit \$status" 0 1 2 3 15
 # Save pid of check in a well known place, so that hangcheck can be sure it
 # has the right pid (getting the pid from ps output is not reliable enough).
 #
-rm -rf /tmp/check.pid
-echo $$ >/tmp/check.pid
+rm -rf "${TEST_DIR}"/check.pid
+echo $$ > "${TEST_DIR}"/check.pid
 
 # for hangcheck ...
 # Save the status of check in a well known place, so that hangcheck can be
 # sure to know where check is up to (getting test number from ps output is
 # not reliable enough since the trace stuff has been introduced).
 #
-rm -rf /tmp/check.sts
-echo "preamble" >/tmp/check.sts
+rm -rf "${TEST_DIR}"/check.sts
+echo "preamble" > "${TEST_DIR}"/check.sts
 
 # don't leave old full output behind on a clean run
 rm -f check.full
@@ -285,7 +286,7 @@ do
         rm -f core $seq.notrun
 
         # for hangcheck ...
-        echo "$seq" >/tmp/check.sts
+        echo "$seq" > "${TEST_DIR}"/check.sts
 
         start=`_wallclock`
         $timestamp && echo -n "        ["`date "+%T"`"]"
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 8499e1b611..0c0b5334b3 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -16,6 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+import errno
 import os
 import re
 import subprocess
@@ -28,10 +29,6 @@ import qmp
 import qtest
 import struct
 
-__all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
-           'VM', 'QMPTestCase', 'notrun', 'main', 'verify_image_format',
-           'verify_platform', 'filter_test_dir', 'filter_win32',
-           'filter_qemu_io', 'filter_chown', 'log']
 
 # This will not work if arguments contain spaces but is necessary if we
 # want to support the override options that ./check supports.
@@ -247,7 +244,8 @@ class VM(object):
             self._qmp.accept()
             self._qtest.accept()
         except:
-            os.remove(self._monitor_path)
+            _remove_if_exists(self._monitor_path)
+            _remove_if_exists(self._qtest_path)
             raise
 
     def shutdown(self):
@@ -409,6 +407,15 @@ class QMPTestCase(unittest.TestCase):
         event = self.wait_until_completed(drive=drive)
         self.assert_qmp(event, 'data/type', 'mirror')
 
+def _remove_if_exists(path):
+    '''Remove file object at path if it exists'''
+    try:
+        os.remove(path)
+    except OSError as exception:
+        if exception.errno == errno.ENOENT:
+           return
+        raise
+
 def notrun(reason):
     '''Skip this test suite'''
     # Each test in qemu-iotests has a number ("seq")
@@ -426,6 +433,11 @@ def verify_platform(supported_oses=['linux']):
     if True not in [sys.platform.startswith(x) for x in supported_oses]:
         notrun('not suitable for this OS: %s' % sys.platform)
 
+def verify_quorum():
+    '''Skip test suite if quorum support is not available'''
+    if 'quorum' not in qemu_img_pipe('--help'):
+        notrun('quorum support missing')
+
 def main(supported_fmts=[], supported_oses=['linux']):
     '''Run tests'''