Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Fri 04 Sep 2015 20:45:33 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream:
  quorum: validate vote threshold against num_children even if read-pattern is fifo
  qcow2: reorder fields in Qcow2CachedTable to reduce padding
  docs: document how to configure the qcow2 L2/refcount caches
  qcow2: add option to clean unused cache entries after some time
  qcow2: mark the memory as no longer needed after qcow2_cache_empty()
  iotests: Warn if python subprocess is killed
  iotests: Do not suppress segfaults in bash tests
  iotests: Respect -nodefaults in tests 41 and 55
  iotests: More options for VM.add_drive()
  qemu-img: Fix crash in amend invocation
  block/raw-posix: Use raw_normalize_devicepath()
  qemu-iotests: s390x: fix test 130
  qemu-iotests: s390x: fix test 049, reject negative sizes in QemuOpts
  qemu-iotests: s390x: fix test 041 and 055
  qemu-iotests: disable default qemu devices for cross-platform compatibility
  qemu-iotests: qemu machine type support

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

29 files changed, 487 insertions, 359 deletions

diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c
index 53b8afc..046f5b8 100644
--- a/block/qcow2-cache.c
+++ b/block/qcow2-cache.c
@@ -22,16 +22,24 @@
  * THE SOFTWARE.
  */
 
+/* Needed for CONFIG_MADVISE */
+#include "config-host.h"
+
+#if defined(CONFIG_MADVISE) || defined(CONFIG_POSIX_MADVISE)
+#include <sys/mman.h>
+#endif
+
 #include "block/block_int.h"
 #include "qemu-common.h"
+#include "qemu/osdep.h"
 #include "qcow2.h"
 #include "trace.h"
 
 typedef struct Qcow2CachedTable {
     int64_t  offset;
-    bool     dirty;
     uint64_t lru_counter;
     int      ref;
+    bool     dirty;
 } Qcow2CachedTable;
 
 struct Qcow2Cache {
@@ -41,6 +49,7 @@ struct Qcow2Cache {
     bool                    depends_on_flush;
     void                   *table_array;
     uint64_t                lru_counter;
+    uint64_t                cache_clean_lru_counter;
 };
 
 static inline void *qcow2_cache_get_table_addr(BlockDriverState *bs,
@@ -60,6 +69,56 @@ static inline int qcow2_cache_get_table_idx(BlockDriverState *bs,
     return idx;
 }
 
+static void qcow2_cache_table_release(BlockDriverState *bs, Qcow2Cache *c,
+                                      int i, int num_tables)
+{
+#if QEMU_MADV_DONTNEED != QEMU_MADV_INVALID
+    BDRVQcowState *s = bs->opaque;
+    void *t = qcow2_cache_get_table_addr(bs, c, i);
+    int align = getpagesize();
+    size_t mem_size = (size_t) s->cluster_size * num_tables;
+    size_t offset = QEMU_ALIGN_UP((uintptr_t) t, align) - (uintptr_t) t;
+    size_t length = QEMU_ALIGN_DOWN(mem_size - offset, align);
+    if (length > 0) {
+        qemu_madvise((uint8_t *) t + offset, length, QEMU_MADV_DONTNEED);
+    }
+#endif
+}
+
+static inline bool can_clean_entry(Qcow2Cache *c, int i)
+{
+    Qcow2CachedTable *t = &c->entries[i];
+    return t->ref == 0 && !t->dirty && t->offset != 0 &&
+        t->lru_counter <= c->cache_clean_lru_counter;
+}
+
+void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c)
+{
+    int i = 0;
+    while (i < c->size) {
+        int to_clean = 0;
+
+        /* Skip the entries that we don't need to clean */
+        while (i < c->size && !can_clean_entry(c, i)) {
+            i++;
+        }
+
+        /* And count how many we can clean in a row */
+        while (i < c->size && can_clean_entry(c, i)) {
+            c->entries[i].offset = 0;
+            c->entries[i].lru_counter = 0;
+            i++;
+            to_clean++;
+        }
+
+        if (to_clean > 0) {
+            qcow2_cache_table_release(bs, c, i - to_clean, to_clean);
+        }
+    }
+
+    c->cache_clean_lru_counter = c->lru_counter;
+}
+
 Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
 {
     BDRVQcowState *s = bs->opaque;
@@ -237,6 +296,8 @@ int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c)
         c->entries[i].lru_counter = 0;
     }
 
+    qcow2_cache_table_release(bs, c, 0, c->size);
+
     c->lru_counter = 0;
 
     return 0;
diff --git a/block/qcow2.c b/block/qcow2.c
index 76c331b..ea34ae2 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -467,6 +467,11 @@ static QemuOptsList qcow2_runtime_opts = {
             .type = QEMU_OPT_SIZE,
             .help = "Maximum refcount block cache size",
         },
+        {
+            .name = QCOW2_OPT_CACHE_CLEAN_INTERVAL,
+            .type = QEMU_OPT_NUMBER,
+            .help = "Clean unused cache entries after this time (in seconds)",
+        },
         { /* end of list */ }
     },
 };
@@ -482,6 +487,49 @@ static const char *overlap_bool_option_names[QCOW2_OL_MAX_BITNR] = {
     [QCOW2_OL_INACTIVE_L2_BITNR]    = QCOW2_OPT_OVERLAP_INACTIVE_L2,
 };
 
+static void cache_clean_timer_cb(void *opaque)
+{
+    BlockDriverState *bs = opaque;
+    BDRVQcowState *s = bs->opaque;
+    qcow2_cache_clean_unused(bs, s->l2_table_cache);
+    qcow2_cache_clean_unused(bs, s->refcount_block_cache);
+    timer_mod(s->cache_clean_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+              (int64_t) s->cache_clean_interval * 1000);
+}
+
+static void cache_clean_timer_init(BlockDriverState *bs, AioContext *context)
+{
+    BDRVQcowState *s = bs->opaque;
+    if (s->cache_clean_interval > 0) {
+        s->cache_clean_timer = aio_timer_new(context, QEMU_CLOCK_VIRTUAL,
+                                             SCALE_MS, cache_clean_timer_cb,
+                                             bs);
+        timer_mod(s->cache_clean_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
+                  (int64_t) s->cache_clean_interval * 1000);
+    }
+}
+
+static void cache_clean_timer_del(BlockDriverState *bs)
+{
+    BDRVQcowState *s = bs->opaque;
+    if (s->cache_clean_timer) {
+        timer_del(s->cache_clean_timer);
+        timer_free(s->cache_clean_timer);
+        s->cache_clean_timer = NULL;
+    }
+}
+
+static void qcow2_detach_aio_context(BlockDriverState *bs)
+{
+    cache_clean_timer_del(bs);
+}
+
+static void qcow2_attach_aio_context(BlockDriverState *bs,
+                                     AioContext *new_context)
+{
+    cache_clean_timer_init(bs, new_context);
+}
+
 static void read_cache_sizes(BlockDriverState *bs, QemuOpts *opts,
                              uint64_t *l2_cache_size,
                              uint64_t *refcount_cache_size, Error **errp)
@@ -555,6 +603,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
     const char *opt_overlap_check, *opt_overlap_check_template;
     int overlap_check_template = 0;
     uint64_t l2_cache_size, refcount_cache_size;
+    uint64_t cache_clean_interval;
 
     ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
     if (ret < 0) {
@@ -848,6 +897,16 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
+    cache_clean_interval =
+        qemu_opt_get_number(opts, QCOW2_OPT_CACHE_CLEAN_INTERVAL, 0);
+    if (cache_clean_interval > UINT_MAX) {
+        error_setg(errp, "Cache clean interval too big");
+        ret = -EINVAL;
+        goto fail;
+    }
+    s->cache_clean_interval = cache_clean_interval;
+    cache_clean_timer_init(bs, bdrv_get_aio_context(bs));
+
     s->cluster_cache = g_malloc(s->cluster_size);
     /* one more sector for decompressed data alignment */
     s->cluster_data = qemu_try_blockalign(bs->file, QCOW_MAX_CRYPT_CLUSTERS
@@ -1013,6 +1072,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
     qemu_vfree(s->l1_table);
     /* else pre-write overlap checks in cache_destroy may crash */
     s->l1_table = NULL;
+    cache_clean_timer_del(bs);
     if (s->l2_table_cache) {
         qcow2_cache_destroy(bs, s->l2_table_cache);
     }
@@ -1471,6 +1531,7 @@ static void qcow2_close(BlockDriverState *bs)
         }
     }
 
+    cache_clean_timer_del(bs);
     qcow2_cache_destroy(bs, s->l2_table_cache);
     qcow2_cache_destroy(bs, s->refcount_block_cache);
 
@@ -2977,6 +3038,9 @@ BlockDriver bdrv_qcow2 = {
     .create_opts         = &qcow2_create_opts,
     .bdrv_check          = qcow2_check,
     .bdrv_amend_options  = qcow2_amend_options,
+
+    .bdrv_detach_aio_context  = qcow2_detach_aio_context,
+    .bdrv_attach_aio_context  = qcow2_attach_aio_context,
 };
 
 static void bdrv_qcow2_init(void)
diff --git a/block/qcow2.h b/block/qcow2.h
index 72e1328..71dafd6 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -96,6 +96,7 @@
 #define QCOW2_OPT_CACHE_SIZE "cache-size"
 #define QCOW2_OPT_L2_CACHE_SIZE "l2-cache-size"
 #define QCOW2_OPT_REFCOUNT_CACHE_SIZE "refcount-cache-size"
+#define QCOW2_OPT_CACHE_CLEAN_INTERVAL "cache-clean-interval"
 
 typedef struct QCowHeader {
     uint32_t magic;
@@ -239,6 +240,8 @@ typedef struct BDRVQcowState {
 
     Qcow2Cache* l2_table_cache;
     Qcow2Cache* refcount_block_cache;
+    QEMUTimer *cache_clean_timer;
+    unsigned cache_clean_interval;
 
     uint8_t *cluster_cache;
     uint8_t *cluster_data;
@@ -581,6 +584,7 @@ int qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
     Qcow2Cache *dependency);
 void qcow2_cache_depends_on_flush(Qcow2Cache *c);
 
+void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c);
 int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c);
 
 int qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
diff --git a/block/quorum.c b/block/quorum.c
index 2f6c45f..8fe53b4 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -889,6 +889,12 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
     }
 
     s->threshold = qemu_opt_get_number(opts, QUORUM_OPT_VOTE_THRESHOLD, 0);
+    /* and validate it against s->num_children */
+    ret = quorum_valid_threshold(s->threshold, s->num_children, &local_err);
+    if (ret < 0) {
+        goto exit;
+    }
+
     ret = parse_read_pattern(qemu_opt_get(opts, QUORUM_OPT_READ_PATTERN));
     if (ret < 0) {
         error_setg(&local_err, "Please set read-pattern as fifo or quorum");
@@ -897,12 +903,6 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
     s->read_pattern = ret;
 
     if (s->read_pattern == QUORUM_READ_PATTERN_QUORUM) {
-        /* and validate it against s->num_children */
-        ret = quorum_valid_threshold(s->threshold, s->num_children, &local_err);
-        if (ret < 0) {
-            goto exit;
-        }
-
         /* is the driver in blkverify mode */
         if (qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false) &&
             s->num_children == 2 && s->threshold == 2) {
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 855febe..30df8ad 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -670,11 +670,17 @@ static int raw_reopen_prepare(BDRVReopenState *state,
 
     /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
     if (raw_s->fd == -1) {
-        assert(!(raw_s->open_flags & O_CREAT));
-        raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags);
-        if (raw_s->fd == -1) {
-            error_setg_errno(errp, errno, "Could not reopen file");
-            ret = -1;
+        const char *normalized_filename = state->bs->filename;
+        ret = raw_normalize_devicepath(&normalized_filename);
+        if (ret < 0) {
+            error_setg_errno(errp, -ret, "Could not normalize device path");
+        } else {
+            assert(!(raw_s->open_flags & O_CREAT));
+            raw_s->fd = qemu_open(normalized_filename, raw_s->open_flags);
+            if (raw_s->fd == -1) {
+                error_setg_errno(errp, errno, "Could not reopen file");
+                ret = -1;
+            }
         }
     }
 
@@ -2314,6 +2320,12 @@ static int hdev_create(const char *filename, QemuOpts *opts,
 
     (void)has_prefix;
 
+    ret = raw_normalize_devicepath(&filename);
+    if (ret < 0) {
+        error_setg_errno(errp, -ret, "Could not normalize device path");
+        return ret;
+    }
+
     /* Read out options */
     total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
                           BDRV_SECTOR_SIZE);
diff --git a/docs/qcow2-cache.txt b/docs/qcow2-cache.txt
new file mode 100644
index 0000000..5bb0607
--- /dev/null
+++ b/docs/qcow2-cache.txt
@@ -0,0 +1,164 @@
+qcow2 L2/refcount cache configuration
+=====================================
+Copyright (C) 2015 Igalia, S.L.
+Author: Alberto Garcia <berto@igalia.com>
+
+This work is licensed under the terms of the GNU GPL, version 2 or
+later. See the COPYING file in the top-level directory.
+
+Introduction
+------------
+The QEMU qcow2 driver has two caches that can improve the I/O
+performance significantly. However, setting the right cache sizes is
+not a straightforward operation.
+
+This document attempts to give an overview of the L2 and refcount
+caches, and how to configure them.
+
+Please refer to the docs/specs/qcow2.txt file for an in-depth
+technical description of the qcow2 file format.
+
+
+Clusters
+--------
+A qcow2 file is organized in units of constant size called clusters.
+
+The cluster size is configurable, but it must be a power of two and
+its value 512 bytes or higher. QEMU currently defaults to 64 KB
+clusters, and it does not support sizes larger than 2MB.
+
+The 'qemu-img create' command supports specifying the size using the
+cluster_size option:
+
+   qemu-img create -f qcow2 -o cluster_size=128K hd.qcow2 4G
+
+
+The L2 tables
+-------------
+The qcow2 format uses a two-level structure to map the virtual disk as
+seen by the guest to the disk image in the host. These structures are
+called the L1 and L2 tables.
+
+There is one single L1 table per disk image. The table is small and is
+always kept in memory.
+
+There can be many L2 tables, depending on how much space has been
+allocated in the image. Each table is one cluster in size. In order to
+read or write data from the virtual disk, QEMU needs to read its
+corresponding L2 table to find out where that data is located. Since
+reading the table for each I/O operation can be expensive, QEMU keeps
+an L2 cache in memory to speed up disk access.
+
+The size of the L2 cache can be configured, and setting the right
+value can improve the I/O performance significantly.
+
+
+The refcount blocks
+-------------------
+The qcow2 format also mantains a reference count for each cluster.
+Reference counts are used for cluster allocation and internal
+snapshots. The data is stored in a two-level structure similar to the
+L1/L2 tables described above.
+
+The second level structures are called refcount blocks, are also one
+cluster in size and the number is also variable and dependent on the
+amount of allocated space.
+
+Each block contains a number of refcount entries. Their size (in bits)
+is a power of two and must not be higher than 64. It defaults to 16
+bits, but a different value can be set using the refcount_bits option:
+
+   qemu-img create -f qcow2 -o refcount_bits=8 hd.qcow2 4G
+
+QEMU keeps a refcount cache to speed up I/O much like the
+aforementioned L2 cache, and its size can also be configured.
+
+
+Choosing the right cache sizes
+------------------------------
+In order to choose the cache sizes we need to know how they relate to
+the amount of allocated space.
+
+The amount of virtual disk that can be mapped by the L2 and refcount
+caches (in bytes) is:
+
+   disk_size = l2_cache_size * cluster_size / 8
+   disk_size = refcount_cache_size * cluster_size * 8 / refcount_bits
+
+With the default values for cluster_size (64KB) and refcount_bits
+(16), that is
+
+   disk_size = l2_cache_size * 8192
+   disk_size = refcount_cache_size * 32768
+
+So in order to cover n GB of disk space with the default values we
+need:
+
+   l2_cache_size = disk_size_GB * 131072
+   refcount_cache_size = disk_size_GB * 32768
+
+QEMU has a default L2 cache of 1MB (1048576 bytes) and a refcount
+cache of 256KB (262144 bytes), so using the formulas we've just seen
+we have
+
+   1048576 / 131072 = 8 GB of virtual disk covered by that cache
+    262144 /  32768 = 8 GB
+
+
+How to configure the cache sizes
+--------------------------------
+Cache sizes can be configured using the -drive option in the
+command-line, or the 'blockdev-add' QMP command.
+
+There are three options available, and all of them take bytes:
+
+"l2-cache-size":         maximum size of the L2 table cache
+"refcount-cache-size":   maximum size of the refcount block cache
+"cache-size":            maximum size of both caches combined
+
+There are two things that need to be taken into account:
+
+ - Both caches must have a size that is a multiple of the cluster
+   size.
+
+ - If you only set one of the options above, QEMU will automatically
+   adjust the others so that the L2 cache is 4 times bigger than the
+   refcount cache.
+
+This means that these options are equivalent:
+
+   -drive file=hd.qcow2,l2-cache-size=2097152
+   -drive file=hd.qcow2,refcount-cache-size=524288
+   -drive file=hd.qcow2,cache-size=2621440
+
+The reason for this 1/4 ratio is to ensure that both caches cover the
+same amount of disk space. Note however that this is only valid with
+the default value of refcount_bits (16). If you are using a different
+value you might want to calculate both cache sizes yourself since QEMU
+will always use the same 1/4 ratio.
+
+It's also worth mentioning that there's no strict need for both caches
+to cover the same amount of disk space. The refcount cache is used
+much less often than the L2 cache, so it's perfectly reasonable to
+keep it small.
+
+
+Reducing the memory usage
+-------------------------
+It is possible to clean unused cache entries in order to reduce the
+memory usage during periods of low I/O activity.
+
+The parameter "cache-clean-interval" defines an interval (in seconds).
+All cache entries that haven't been accessed during that interval are
+removed from memory.
+
+This example removes all unused cache entries every 15 minutes:
+
+   -drive file=hd.qcow2,cache-clean-interval=900
+
+If unset, the default value for this parameter is 0 and it disables
+this feature.
+
+Note that this functionality currently relies on the MADV_DONTNEED
+argument for madvise() to actually free the memory, so it is not
+useful in systems that don't follow that behavior.
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 7b2efb8..bb2189e 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1592,6 +1592,10 @@
 # @refcount-cache-size:   #optional the maximum size of the refcount block cache
 #                         in bytes (since 2.2)
 #
+# @cache-clean-interval:  #optional clean unused entries in the L2 and refcount
+#                         caches. The interval is in seconds. The default value
+#                         is 0 and it disables this feature (since 2.5)
+#
 # Since: 1.7
 ##
 { 'struct': 'BlockdevOptionsQcow2',
@@ -1603,7 +1607,8 @@
             '*overlap-check': 'Qcow2OverlapChecks',
             '*cache-size': 'int',
             '*l2-cache-size': 'int',
-            '*refcount-cache-size': 'int' } }
+            '*refcount-cache-size': 'int',
+            '*cache-clean-interval': 'int' } }
 
 
 ##
diff --git a/qemu-img.c b/qemu-img.c
index 75f4ee4..6ff4e85 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2931,7 +2931,7 @@ static int img_amend(int argc, char **argv)
                 if (!is_valid_option_list(optarg)) {
                     error_report("Invalid option list: %s", optarg);
                     ret = -1;
-                    goto out;
+                    goto out_no_progress;
                 }
                 if (!options) {
                     options = g_strdup(optarg);
@@ -3031,6 +3031,7 @@ static int img_amend(int argc, char **argv)
 out:
     qemu_progress_end();
 
+out_no_progress:
     blk_unref(blk);
     qemu_opts_del(opts);
     qemu_opts_free(create_opts);
diff --git a/tests/qemu-iotests/039 b/tests/qemu-iotests/039
index 859705f..617f397 100755
--- a/tests/qemu-iotests/039
+++ b/tests/qemu-iotests/039
@@ -47,13 +47,6 @@ _supported_os Linux
 _default_cache_mode "writethrough"
 _supported_cache_modes "writethrough"
 
-_subshell_exec()
-{
-    # Executing crashing commands in a subshell prevents information like the
-    # "Killed" line from being lost
-    (exec "$@")
-}
-
 size=128M
 
 echo
@@ -74,8 +67,8 @@ echo "== Creating a dirty image file =="
 IMGOPTS="compat=1.1,lazy_refcounts=on"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must be set
@@ -109,8 +102,8 @@ echo "== Opening a dirty image read/write should repair it =="
 IMGOPTS="compat=1.1,lazy_refcounts=on"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must be set
@@ -127,8 +120,8 @@ echo "== Creating an image file with lazy_refcounts=off =="
 IMGOPTS="compat=1.1,lazy_refcounts=off"
 _make_test_img $size
 
-_subshell_exec $QEMU_IO -c "write -P 0x5a 0 512" \
-                        -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
+$QEMU_IO -c "write -P 0x5a 0 512" \
+         -c "sigraise $(kill -l KILL)" "$TEST_IMG" 2>&1 \
     | _filter_qemu_io
 
 # The dirty bit must not be set since lazy_refcounts=off
diff --git a/tests/qemu-iotests/039.out b/tests/qemu-iotests/039.out
index d09751f..b055670 100644
--- a/tests/qemu-iotests/039.out
+++ b/tests/qemu-iotests/039.out
@@ -11,7 +11,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
 incompatible_features     0x1
 ERROR cluster 5 refcount=0 reference=1
 ERROR OFLAG_COPIED data cluster: l2_entry=8000000000050000 refcount=0
@@ -46,7 +46,7 @@ read 512/512 bytes at offset 0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
 incompatible_features     0x1
 ERROR cluster 5 refcount=0 reference=1
 Rebuilding refcount structure
@@ -60,7 +60,7 @@ incompatible_features     0x0
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 wrote 512/512 bytes at offset 0
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-./039: Killed                  ( exec "$@" )
+./common.config: Killed                  ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
 incompatible_features     0x0
 No errors were found on the image.
 
diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
index 3d46ed7..38ca5f1 100755
--- a/tests/qemu-iotests/041
+++ b/tests/qemu-iotests/041
@@ -42,6 +42,8 @@ class TestSingleDrive(iotests.QMPTestCase):
         iotests.create_image(backing_img, self.image_len)
         qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
         self.vm = iotests.VM().add_drive(test_img)
+        if iotests.qemu_default_machine == 'pc':
+            self.vm.add_drive(None, 'media=cdrom', 'ide')
         self.vm.launch()
 
     def tearDown(self):
@@ -167,8 +169,11 @@ class TestSingleDrive(iotests.QMPTestCase):
                         'target image does not match source after mirroring')
 
     def test_medium_not_found(self):
-        result = self.vm.qmp('drive-mirror', device='ide1-cd0', sync='full',
-                             target=target_img)
+        if iotests.qemu_default_machine != 'pc':
+            return
+
+        result = self.vm.qmp('drive-mirror', device='drive1', # CD-ROM
+                             sync='full', target=target_img)
         self.assert_qmp(result, 'error/class', 'GenericError')
 
     def test_image_not_found(self):
@@ -707,6 +712,9 @@ class TestRepairQuorum(iotests.QMPTestCase):
     def setUp(self):
         self.vm = iotests.VM()
 
+        if iotests.qemu_default_machine == 'pc':
+            self.vm.add_drive(None, 'media=cdrom', 'ide')
+
         # Add each individual quorum images
         for i in self.IMAGES:
             qemu_img('create', '-f', iotests.imgfmt, i,
@@ -831,7 +839,11 @@ class TestRepairQuorum(iotests.QMPTestCase):
         if not self.has_quorum():
             return
 
-        result = self.vm.qmp('drive-mirror', device='ide1-cd0', sync='full',
+        if iotests.qemu_default_machine != 'pc':
+            return
+
+        result = self.vm.qmp('drive-mirror', device='drive0', # CD-ROM
+                             sync='full',
                              node_name='repair0',
                              replaces='img1',
                              target=quorum_repair_img, format=iotests.imgfmt)
diff --git a/tests/qemu-iotests/049.out b/tests/qemu-iotests/049.out
index 9f93666..8884543 100644
--- a/tests/qemu-iotests/049.out
+++ b/tests/qemu-iotests/049.out
@@ -95,17 +95,15 @@ qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- -1024
 qemu-img: Image size must be less than 8 EiB!
 
 qemu-img create -f qcow2 -o size=-1024 TEST_DIR/t.qcow2
-qemu-img: qcow2 doesn't support shrinking images yet
-qemu-img: TEST_DIR/t.qcow2: Could not resize image: Operation not supported
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=-1024 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
+qemu-img: Parameter 'size' expects a non-negative number below 2^64
+qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- -1k
 qemu-img: Image size must be less than 8 EiB!
 
 qemu-img create -f qcow2 -o size=-1k TEST_DIR/t.qcow2
-qemu-img: qcow2 doesn't support shrinking images yet
-qemu-img: TEST_DIR/t.qcow2: Could not resize image: Operation not supported
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=-1024 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
+qemu-img: Parameter 'size' expects a non-negative number below 2^64
+qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 -- 1kilobyte
 qemu-img: Invalid image size specified! You may use k, M, G, T, P or E suffixes for
diff --git a/tests/qemu-iotests/055 b/tests/qemu-iotests/055
index 017a609..c8e3578 100755
--- a/tests/qemu-iotests/055
+++ b/tests/qemu-iotests/055
@@ -42,6 +42,8 @@ class TestSingleDrive(iotests.QMPTestCase):
         qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(TestSingleDrive.image_len))
 
         self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
+        if iotests.qemu_default_machine == 'pc':
+            self.vm.add_drive(None, 'media=cdrom', 'ide')
         self.vm.launch()
 
     def tearDown(self):
@@ -104,12 +106,18 @@ class TestSingleDrive(iotests.QMPTestCase):
         self.do_test_pause('blockdev-backup', 'drive1', blockdev_target_img)
 
     def test_medium_not_found(self):
-        result = self.vm.qmp('drive-backup', device='ide1-cd0',
+        if iotests.qemu_default_machine != 'pc':
+            return
+
+        result = self.vm.qmp('drive-backup', device='drive2', # CD-ROM
                              target=target_img, sync='full')
         self.assert_qmp(result, 'error/class', 'GenericError')
 
     def test_medium_not_found_blockdev_backup(self):
-        result = self.vm.qmp('blockdev-backup', device='ide1-cd0',
+        if iotests.qemu_default_machine != 'pc':
+            return
+
+        result = self.vm.qmp('blockdev-backup', device='drive2', # CD-ROM
                              target='drive1', sync='full')
         self.assert_qmp(result, 'error/class', 'GenericError')
 
@@ -249,6 +257,8 @@ class TestSingleTransaction(iotests.QMPTestCase):
         qemu_img('create', '-f', iotests.imgfmt, blockdev_target_img, str(TestSingleDrive.image_len))
 
         self.vm = iotests.VM().add_drive(test_img).add_drive(blockdev_target_img)
+        if iotests.qemu_default_machine == 'pc':
+            self.vm.add_drive(None, 'media=cdrom', 'ide')
         self.vm.launch()
 
     def tearDown(self):
@@ -323,9 +333,12 @@ class TestSingleTransaction(iotests.QMPTestCase):
         self.do_test_pause('blockdev-backup', 'drive1', blockdev_target_img)
 
     def do_test_medium_not_found(self, cmd, target):
+        if iotests.qemu_default_machine != 'pc':
+            return
+
         result = self.vm.qmp('transaction', actions=[{
                 'type': cmd,
-                'data': { 'device': 'ide1-cd0',
+                'data': { 'device': 'drive2', # CD-ROM
                           'target': target,
                           'sync': 'full' },
             }
diff --git a/tests/qemu-iotests/061 b/tests/qemu-iotests/061
index 8d37f8a..1df887a 100755
--- a/tests/qemu-iotests/061
+++ b/tests/qemu-iotests/061
@@ -58,7 +58,8 @@ echo
 echo "=== Testing dirty version downgrade ==="
 echo
 IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
-$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
+    | _filter_qemu_io
 $PYTHON qcow2.py "$TEST_IMG" dump-header
 $QEMU_IMG amend -o "compat=0.10" "$TEST_IMG"
 $PYTHON qcow2.py "$TEST_IMG" dump-header
@@ -91,7 +92,8 @@ echo
 echo "=== Testing dirty lazy_refcounts=off ==="
 echo
 IMGOPTS="compat=1.1,lazy_refcounts=on" _make_test_img 64M
-$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" | _filter_qemu_io
+$QEMU_IO -c "write -P 0x2a 0 128k" -c flush -c abort "$TEST_IMG" 2>&1 \
+    | _filter_qemu_io
 $PYTHON qcow2.py "$TEST_IMG" dump-header
 $QEMU_IMG amend -o "lazy_refcounts=off" "$TEST_IMG"
 $PYTHON qcow2.py "$TEST_IMG" dump-header
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index 5ec248f..4505376 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -57,6 +57,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Aborted                 (core dumped) ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
 magic                     0x514649fb
 version                   3
 backing_file_offset       0x0
@@ -214,6 +215,7 @@ No errors were found on the image.
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
 wrote 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+./common.config: Aborted                 (core dumped) ( exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@" )
 magic                     0x514649fb
 version                   3
 backing_file_offset       0x0
diff --git a/tests/qemu-iotests/067 b/tests/qemu-iotests/067
index 83eefa3..3e9a053 100755
--- a/tests/qemu-iotests/067
+++ b/tests/qemu-iotests/067
@@ -59,7 +59,7 @@ echo
 echo === -drive/-device and device_del ===
 echo
 
-run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk -device virtio-blk-pci,drive=disk,id=virtio0 <<EOF
+run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk -device virtio-blk,drive=disk,id=virtio0 <<EOF
 { "execute": "qmp_capabilities" }
 { "execute": "query-block" }
 { "execute": "device_del", "arguments": { "id": "virtio0" } }
@@ -76,7 +76,7 @@ run_qemu -drive file=$TEST_IMG,format=$IMGFMT,if=none,id=disk <<EOF
 { "execute": "qmp_capabilities" }
 { "execute": "query-block" }
 { "execute": "device_add",
-   "arguments": { "driver": "virtio-blk-pci", "drive": "disk",
+   "arguments": { "driver": "virtio-blk", "drive": "disk",
                   "id": "virtio0" } }
 { "execute": "device_del", "arguments": { "id": "virtio0" } }
 { "execute": "system_reset" }
@@ -94,7 +94,7 @@ run_qemu <<EOF
   "arguments": { "command-line": "drive_add 0 file=$TEST_IMG,format=$IMGFMT,if=none,id=disk" } }
 { "execute": "query-block" }
 { "execute": "device_add",
-   "arguments": { "driver": "virtio-blk-pci", "drive": "disk",
+   "arguments": { "driver": "virtio-blk", "drive": "disk",
                   "id": "virtio0" } }
 { "execute": "device_del", "arguments": { "id": "virtio0" } }
 { "execute": "system_reset" }
@@ -122,7 +122,7 @@ run_qemu <<EOF
   }
 { "execute": "query-block" }
 { "execute": "device_add",
-   "arguments": { "driver": "virtio-blk-pci", "drive": "disk",
+   "arguments": { "driver": "virtio-blk", "drive": "disk",
                   "id": "virtio0" } }
 { "execute": "device_del", "arguments": { "id": "virtio0" } }
 { "execute": "system_reset" }
diff --git a/tests/qemu-iotests/067.out b/tests/qemu-iotests/067.out
index 6ff41bc..5fbc881 100644
--- a/tests/qemu-iotests/067.out
+++ b/tests/qemu-iotests/067.out
@@ -3,7 +3,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728
 
 === -drive/-device and device_del ===
 
-Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virtio-blk-pci,drive=disk,id=virtio0
+Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virtio-blk,drive=disk,id=virtio0
 {
     QMP_VERSION
 }
@@ -57,28 +57,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virti
                 "encryption_key_missing": false
             },
             "type": "unknown"
-        },
-        {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
         }
     ]
 }
@@ -120,28 +98,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virti
 }
 {
     "return": [
-        {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        }
     ]
 }
 {
@@ -155,28 +111,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk -device virti
     },
     "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
-    }
-}
 
 
 === -drive/device_add and device_del ===
@@ -235,28 +169,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk
             },
             "tray_open": false,
             "type": "unknown"
-        },
-        {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
         }
     ]
 }
@@ -302,28 +214,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk
 }
 {
     "return": [
-        {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        }
     ]
 }
 {
@@ -337,28 +227,6 @@ Testing: -drive file=TEST_DIR/t.qcow2,format=qcow2,if=none,id=disk
     },
     "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
-    }
-}
 
 
 === drive_add/device_add and device_del ===
@@ -377,28 +245,6 @@ Testing:
 {
     "return": [
         {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
             "device": "disk",
             "locked": false,
             "removable": true,
@@ -487,28 +333,6 @@ Testing:
 }
 {
     "return": [
-        {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        }
     ]
 }
 {
@@ -522,28 +346,6 @@ Testing:
     },
     "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
-    }
-}
 
 
 === blockdev_add/device_add and device_del ===
@@ -563,28 +365,6 @@ Testing:
 {
     "return": [
         {
-            "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
             "device": "disk",
             "locked": false,
             "removable": true,
@@ -675,28 +455,6 @@ Testing:
     "return": [
         {
             "io-status": "ok",
-            "device": "ide1-cd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "floppy0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "device": "sd0",
-            "locked": false,
-            "removable": true,
-            "tray_open": false,
-            "type": "unknown"
-        },
-        {
-            "io-status": "ok",
             "device": "disk",
             "locked": false,
             "removable": true,
@@ -754,27 +512,5 @@ Testing:
     },
     "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
-    }
-}
 
 *** done
diff --git a/tests/qemu-iotests/071.out b/tests/qemu-iotests/071.out
index 9205ce2..8d2095a 100644
--- a/tests/qemu-iotests/071.out
+++ b/tests/qemu-iotests/071.out
@@ -50,8 +50,6 @@ read failed: Input/output error
 {"return": ""}
 {"return": {}}
 {"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_PROG: Failed to flush the L2 table cache: Input/output error
 QEMU_PROG: Failed to flush the refcount block cache: Input/output error
 
@@ -90,8 +88,6 @@ read failed: Input/output error
 {"return": ""}
 {"return": {}}
 {"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_PROG: Failed to flush the L2 table cache: Input/output error
 QEMU_PROG: Failed to flush the refcount block cache: Input/output error
 
diff --git a/tests/qemu-iotests/081.out b/tests/qemu-iotests/081.out
index 9f57d9d..692c4a4 100644
--- a/tests/qemu-iotests/081.out
+++ b/tests/qemu-iotests/081.out
@@ -36,8 +36,6 @@ read 10485760/10485760 bytes at offset 0
 {"return": ""}
 {"return": {}}
 {"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}}
 
 
 == using quorum rewrite corrupted mode ==
diff --git a/tests/qemu-iotests/087.out b/tests/qemu-iotests/087.out
index c71bb3a..c509a40 100644
--- a/tests/qemu-iotests/087.out
+++ b/tests/qemu-iotests/087.out
@@ -9,8 +9,6 @@ QMP_VERSION
 {"error": {"class": "GenericError", "desc": "Block device needs an ID"}}
 {"return": {}}
 {"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}}
 
 
 === Duplicate ID ===
@@ -26,8 +24,6 @@ QMP_VERSION
 {"error": {"class": "GenericError", "desc": "node-name=disk3 is conflicting with a device id"}}
 {"return": {}}
 {"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}}
 
 
 === aio=native without O_DIRECT ===
@@ -38,8 +34,6 @@ QMP_VERSION
 {"error": {"class": "GenericError", "desc": "aio=native requires cache.direct=true"}}
 {"return": {}}
 {"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}}
 
 
 === Encrypted image ===
@@ -60,8 +54,6 @@ You can use 'qemu-img convert' to convert your image to an unencrypted one.
 {"error": {"class": "GenericError", "desc": "blockdev-add doesn't support encrypted devices"}}
 {"return": {}}
 {"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}}
 
 Testing:
 QMP_VERSION
@@ -72,8 +64,6 @@ You can use 'qemu-img convert' to convert your image to an unencrypted one.
 {"error": {"class": "GenericError", "desc": "Guest must be stopped for opening of encrypted image"}}
 {"return": {}}
 {"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}}
 
 
 === Missing driver ===
@@ -91,7 +81,5 @@ QMP_VERSION
 {"error": {"class": "GenericError", "desc": "Invalid parameter type for 'driver', expected: string"}}
 {"return": {}}
 {"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}}
 
 *** done
diff --git a/tests/qemu-iotests/130 b/tests/qemu-iotests/130
index bc26247..9209992 100755
--- a/tests/qemu-iotests/130
+++ b/tests/qemu-iotests/130
@@ -59,8 +59,8 @@ echo
 # bdrv_make_empty() involves a header update for qcow2
 
 # Test that a backing file isn't written
-_launch_qemu -drive file="$TEST_IMG",backing.file.filename="$TEST_IMG.base"
-_send_qemu_cmd $QEMU_HANDLE "commit ide0-hd0" "(qemu)"
+_launch_qemu -drive id=testdisk,file="$TEST_IMG",backing.file.filename="$TEST_IMG.base"
+_send_qemu_cmd $QEMU_HANDLE "commit testdisk" "(qemu)"
 _send_qemu_cmd $QEMU_HANDLE '' '(qemu)'
 _cleanup_qemu
 _img_info | _filter_img_info
@@ -68,8 +68,8 @@ _img_info | _filter_img_info
 # Make sure that if there was a backing file that was just overridden on the
 # command line, that backing file is retained, with the right format
 _make_test_img -F raw -b "$TEST_IMG.orig" 64M
-_launch_qemu -drive file="$TEST_IMG",backing.file.filename="$TEST_IMG.base",backing.driver=$IMGFMT
-_send_qemu_cmd $QEMU_HANDLE "commit ide0-hd0" "(qemu)"
+_launch_qemu -drive id=testdisk,file="$TEST_IMG",backing.file.filename="$TEST_IMG.base",backing.driver=$IMGFMT
+_send_qemu_cmd $QEMU_HANDLE "commit testdisk" "(qemu)"
 _send_qemu_cmd $QEMU_HANDLE '' '(qemu)'
 _cleanup_qemu
 _img_info | _filter_img_info
diff --git a/tests/qemu-iotests/130.out b/tests/qemu-iotests/130.out
index ea68b5d..9ec9d2a 100644
--- a/tests/qemu-iotests/130.out
+++ b/tests/qemu-iotests/130.out
@@ -9,14 +9,14 @@ virtual size: 64M (67108864 bytes)
 === HMP commit ===
 
 QEMU X.Y.Z monitor - type 'help' for more information
-(qemu) ccocomcommcommicommitcommit commit icommit idcommit idecommit ide0commit ide0-commit ide0-hcommit ide0-hdcommit ide0-hd0
+(qemu) ccocomcommcommicommitcommit commit tcommit tecommit tescommit testcommit testdcommit testdicommit testdiscommit testdisk
 (qemu) 
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 64M (67108864 bytes)
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file='TEST_DIR/t.IMGFMT.orig' backing_fmt='raw'
 QEMU X.Y.Z monitor - type 'help' for more information
-(qemu) ccocomcommcommicommitcommit commit icommit idcommit idecommit ide0commit ide0-commit ide0-hcommit ide0-hdcommit ide0-hd0
+(qemu) ccocomcommcommicommitcommit commit tcommit tecommit tescommit testcommit testdcommit testdicommit testdiscommit testdisk
 (qemu) 
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
index 1fa6319..c350f16 100755
--- a/tests/qemu-iotests/check
+++ b/tests/qemu-iotests/check
@@ -231,10 +231,10 @@ FULL_HOST_DETAILS=`_full_platform_details`
 #FULL_MOUNT_OPTIONS=`_scratch_mount_options`
 
 cat <<EOF
-QEMU          -- $QEMU
-QEMU_IMG      -- $QEMU_IMG
-QEMU_IO       -- $QEMU_IO
-QEMU_NBD      -- $QEMU_NBD
+QEMU          -- "$QEMU_PROG" $QEMU_OPTIONS
+QEMU_IMG      -- "$QEMU_IMG_PROG" $QEMU_IMG_OPTIONS
+QEMU_IO       -- "$QEMU_IO_PROG" $QEMU_IO_OPTIONS
+QEMU_NBD      -- "$QEMU_NBD_PROG" $QEMU_NBD_OPTIONS
 IMGFMT        -- $FULL_IMGFMT_DETAILS
 IMGPROTO      -- $FULL_IMGPROTO_DETAILS
 PLATFORM      -- $FULL_HOST_DETAILS
@@ -330,6 +330,11 @@ do
             fi
 
             reference="$source_iotests/$seq.out"
+            reference_machine="$source_iotests/$seq.$QEMU_DEFAULT_MACHINE.out"
+            if [ -f "$reference_machine" ]; then
+                reference="$reference_machine"
+            fi
+
             if [ "$CACHEMODE" = "none" ]; then
                 [ -f "$source_iotests/$seq.out.nocache" ] && reference="$source_iotests/$seq.out.nocache"
             fi
diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index 1030aaf..25c351b 100644
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -52,6 +52,7 @@ export IMGOPTS=""
 export CACHEMODE="writeback"
 export QEMU_IO_OPTIONS=""
 export CACHEMODE_IS_DEFAULT=true
+export QEMU_OPTIONS="-nodefaults"
 
 for r
 do
diff --git a/tests/qemu-iotests/common.config b/tests/qemu-iotests/common.config
index a1973ad..596bb2b 100644
--- a/tests/qemu-iotests/common.config
+++ b/tests/qemu-iotests/common.config
@@ -103,10 +103,40 @@ if [ -z "$QEMU_NBD_PROG" ]; then
     export QEMU_NBD_PROG="`set_prog_path qemu-nbd`"
 fi
 
-export QEMU=$QEMU_PROG
-export QEMU_IMG=$QEMU_IMG_PROG
-export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"
-export QEMU_NBD=$QEMU_NBD_PROG
+_qemu_wrapper()
+{
+    (exec "$QEMU_PROG" $QEMU_OPTIONS "$@")
+}
+
+_qemu_img_wrapper()
+{
+    (exec "$QEMU_IMG_PROG" $QEMU_IMG_OPTIONS "$@")
+}
+
+_qemu_io_wrapper()
+{
+    (exec "$QEMU_IO_PROG" $QEMU_IO_OPTIONS "$@")
+}
+
+_qemu_nbd_wrapper()
+{
+    (exec "$QEMU_NBD_PROG" $QEMU_NBD_OPTIONS "$@")
+}
+
+export QEMU=_qemu_wrapper
+export QEMU_IMG=_qemu_img_wrapper
+export QEMU_IO=_qemu_io_wrapper
+export QEMU_NBD=_qemu_nbd_wrapper
+
+default_machine=$($QEMU -machine \? | awk '/(default)/{print $1}')
+default_alias_machine=$($QEMU -machine \? |\
+    awk -v var_default_machine="$default_machine"\)\
+    '{if ($(NF-2)=="(alias"&&$(NF-1)=="of"&&$(NF)==var_default_machine){print $1}}')
+if [ ! -z "$default_alias_machine" ]; then
+    default_machine="$default_alias_machine"
+fi
+
+export QEMU_DEFAULT_MACHINE="$default_machine"
 
 [ -f /etc/qemu-iotest.config ]       && . /etc/qemu-iotest.config
 
diff --git a/tests/qemu-iotests/common.qemu b/tests/qemu-iotests/common.qemu
index 4e1996c..e3faa53 100644
--- a/tests/qemu-iotests/common.qemu
+++ b/tests/qemu-iotests/common.qemu
@@ -153,7 +153,7 @@ function _launch_qemu()
     mkfifo "${fifo_out}"
     mkfifo "${fifo_in}"
 
-    "${QEMU}" -nographic -serial none ${comm} -machine accel=qtest "${@}" \
+    ${QEMU} -nographic -serial none ${comm} -machine accel=qtest "${@}" \
                                                                 >"${fifo_out}" \
                                                                 2>&1 \
                                                                 <"${fifo_in}" &
diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 22d3514..28e4bea 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -439,7 +439,17 @@ _unsupported_imgopts()
 #
 _require_command()
 {
-    eval c=\$$1
+    if [ "$1" = "QEMU" ]; then
+        c=$QEMU_PROG
+    elif [ "$1" = "QEMU_IMG" ]; then
+        c=$QEMU_IMG_PROG
+    elif [ "$1" = "QEMU_IO" ]; then
+        c=$QEMU_IO_PROG
+    elif [ "$1" = "QEMU_NBD" ]; then
+        c=$QEMU_NBD_PROG
+    else
+        eval c=\$$1
+    fi
     [ -x "$c" ] || _notrun "$1 utility required, skipped this test"
 }
 
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 8615b10..ff5905f 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -31,37 +31,60 @@ import struct
 __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
            'VM', 'QMPTestCase', 'notrun', 'main']
 
-# This will not work if arguments or path contain spaces but is necessary if we
+# This will not work if arguments contain spaces but is necessary if we
 # want to support the override options that ./check supports.
-qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
-qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
-qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
+qemu_img_args = [os.environ.get('QEMU_IMG_PROG', 'qemu-img')]
+if os.environ.get('QEMU_IMG_OPTIONS'):
+    qemu_img_args += os.environ['QEMU_IMG_OPTIONS'].strip().split(' ')
+
+qemu_io_args = [os.environ.get('QEMU_IO_PROG', 'qemu-io')]
+if os.environ.get('QEMU_IO_OPTIONS'):
+    qemu_io_args += os.environ['QEMU_IO_OPTIONS'].strip().split(' ')
+
+qemu_args = [os.environ.get('QEMU_PROG', 'qemu')]
+if os.environ.get('QEMU_OPTIONS'):
+    qemu_args += os.environ['QEMU_OPTIONS'].strip().split(' ')
 
 imgfmt = os.environ.get('IMGFMT', 'raw')
 imgproto = os.environ.get('IMGPROTO', 'file')
 test_dir = os.environ.get('TEST_DIR', '/var/tmp')
 output_dir = os.environ.get('OUTPUT_DIR', '.')
 cachemode = os.environ.get('CACHEMODE')
+qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE')
 
 socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
 
 def qemu_img(*args):
     '''Run qemu-img and return the exit code'''
     devnull = open('/dev/null', 'r+')
-    return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
+    exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return exitcode
 
 def qemu_img_verbose(*args):
     '''Run qemu-img without suppressing its output and return the exit code'''
-    return subprocess.call(qemu_img_args + list(args))
+    exitcode = subprocess.call(qemu_img_args + list(args))
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return exitcode
 
 def qemu_img_pipe(*args):
     '''Run qemu-img and return its output'''
-    return subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE).communicate()[0]
+    subp = subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE)
+    exitcode = subp.wait()
+    if exitcode < 0:
+        sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
+    return subp.communicate()[0]
 
 def qemu_io(*args):
     '''Run qemu-io and return the stdout data'''
     args = qemu_io_args + list(args)
-    return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
+    subp = subprocess.Popen(args, stdout=subprocess.PIPE)
+    exitcode = subp.wait()
+    if exitcode < 0:
+        sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
+    return subp.communicate()[0]
 
 def compare_images(img1, img2):
     '''Return True if two image files are identical'''
@@ -117,13 +140,16 @@ class VM(object):
         self._args.append('-monitor')
         self._args.append(args)
 
-    def add_drive(self, path, opts=''):
+    def add_drive(self, path, opts='', interface='virtio'):
         '''Add a virtio-blk drive to the VM'''
-        options = ['if=virtio',
+        options = ['if=%s' % interface,
                    'format=%s' % imgfmt,
                    'cache=%s' % cachemode,
-                   'file=%s' % path,
                    'id=drive%d' % self._num_drives]
+
+        if path is not None:
+            options.append('file=%s' % path)
+
         if opts:
             options.append(opts)
 
@@ -196,7 +222,9 @@ class VM(object):
         '''Terminate the VM and clean up'''
         if not self._popen is None:
             self._qmp.cmd('quit')
-            self._popen.wait()
+            exitcode = self._popen.wait()
+            if exitcode < 0:
+                sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
             os.remove(self._monitor_path)
             os.remove(self._qtest_path)
             os.remove(self._qemu_log_path)
diff --git a/util/qemu-option.c b/util/qemu-option.c
index efe9d27..efd6f02 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -180,6 +180,11 @@ void parse_option_size(const char *name, const char *value,
 
     if (value != NULL) {
         sizef = strtod(value, &postfix);
+        if (sizef < 0 || sizef > UINT64_MAX) {
+            error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
+                             "a non-negative number below 2^64");
+            return;
+        }
         switch (*postfix) {
         case 'T':
             sizef *= 1024;