Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Block pull request

# gpg: Signature made Mon 16 Jun 2014 12:22:22 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/block-pull-request: (39 commits)
  QemuOpts: cleanup tmp 'allocated' member from QemuOptsList
  cleanup QEMUOptionParameter
  vpc.c: replace QEMUOptionParameter with QemuOpts
  vmdk.c: replace QEMUOptionParameter with QemuOpts
  vhdx.c: replace QEMUOptionParameter with QemuOpts
  vdi.c: replace QEMUOptionParameter with QemuOpts
  ssh.c: replace QEMUOptionParameter with QemuOpts
  sheepdog.c: replace QEMUOptionParameter with QemuOpts
  rbd.c: replace QEMUOptionParameter with QemuOpts
  raw_bsd.c: replace QEMUOptionParameter with QemuOpts
  raw-win32.c: replace QEMUOptionParameter with QemuOpts
  raw-posix.c: replace QEMUOptionParameter with QemuOpts
  qed.c: replace QEMUOptionParameter with QemuOpts
  qcow2.c: replace QEMUOptionParameter with QemuOpts
  QemuOpts: export qemu_opt_find
  qcow.c: replace QEMUOptionParameter with QemuOpts
  nfs.c: replace QEMUOptionParameter with QemuOpts
  iscsi.c: replace QEMUOptionParameter with QemuOpts
  gluster.c: replace QEMUOptionParameter with QemuOpts
  cow.c: replace QEMUOptionParameter with QemuOpts
  ...

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

43 files changed, 1096 insertions, 1203 deletions

diff --git a/block.c b/block.c
index 17f763d..43abe96 100644
--- a/block.c
+++ b/block.c
@@ -424,7 +424,7 @@ BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
 typedef struct CreateCo {
     BlockDriver *drv;
     char *filename;
-    QEMUOptionParameter *options;
+    QemuOpts *opts;
     int ret;
     Error *err;
 } CreateCo;
@@ -437,7 +437,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
     CreateCo *cco = opaque;
     assert(cco->drv);
 
-    ret = cco->drv->bdrv_create(cco->filename, cco->options, &local_err);
+    ret = cco->drv->bdrv_create(cco->filename, cco->opts, &local_err);
     if (local_err) {
         error_propagate(&cco->err, local_err);
     }
@@ -445,7 +445,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
 }
 
 int bdrv_create(BlockDriver *drv, const char* filename,
-    QEMUOptionParameter *options, Error **errp)
+                QemuOpts *opts, Error **errp)
 {
     int ret;
 
@@ -453,7 +453,7 @@ int bdrv_create(BlockDriver *drv, const char* filename,
     CreateCo cco = {
         .drv = drv,
         .filename = g_strdup(filename),
-        .options = options,
+        .opts = opts,
         .ret = NOT_DONE,
         .err = NULL,
     };
@@ -489,8 +489,7 @@ out:
     return ret;
 }
 
-int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
-                     Error **errp)
+int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp)
 {
     BlockDriver *drv;
     Error *local_err = NULL;
@@ -502,7 +501,7 @@ int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
         return -ENOENT;
     }
 
-    ret = bdrv_create(drv, filename, options, &local_err);
+    ret = bdrv_create(drv, filename, opts, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
     }
@@ -1247,7 +1246,7 @@ void bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
     char *tmp_filename = g_malloc0(PATH_MAX + 1);
     int64_t total_size;
     BlockDriver *bdrv_qcow2;
-    QEMUOptionParameter *create_options;
+    QemuOpts *opts = NULL;
     QDict *snapshot_options;
     BlockDriverState *bs_snapshot;
     Error *local_err;
@@ -1272,13 +1271,11 @@ void bdrv_append_temp_snapshot(BlockDriverState *bs, int flags, Error **errp)
     }
 
     bdrv_qcow2 = bdrv_find_format("qcow2");
-    create_options = parse_option_parameters("", bdrv_qcow2->create_options,
-                                             NULL);
-
-    set_option_parameter_int(create_options, BLOCK_OPT_SIZE, total_size);
-
-    ret = bdrv_create(bdrv_qcow2, tmp_filename, create_options, &local_err);
-    free_option_parameters(create_options);
+    opts = qemu_opts_create(bdrv_qcow2->create_opts, NULL, 0,
+                            &error_abort);
+    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_size);
+    ret = bdrv_create(bdrv_qcow2, tmp_filename, opts, &local_err);
+    qemu_opts_del(opts);
     if (ret < 0) {
         error_setg_errno(errp, -ret, "Could not create temporary overlay "
                          "'%s': %s", tmp_filename,
@@ -5519,8 +5516,10 @@ void bdrv_img_create(const char *filename, const char *fmt,
                      char *options, uint64_t img_size, int flags,
                      Error **errp, bool quiet)
 {
-    QEMUOptionParameter *param = NULL, *create_options = NULL;
-    QEMUOptionParameter *backing_fmt, *backing_file, *size;
+    QemuOptsList *create_opts = NULL;
+    QemuOpts *opts = NULL;
+    const char *backing_fmt, *backing_file;
+    int64_t size;
     BlockDriver *drv, *proto_drv;
     BlockDriver *backing_drv = NULL;
     Error *local_err = NULL;
@@ -5539,28 +5538,23 @@ void bdrv_img_create(const char *filename, const char *fmt,
         return;
     }
 
-    create_options = append_option_parameters(create_options,
-                                              drv->create_options);
-    create_options = append_option_parameters(create_options,
-                                              proto_drv->create_options);
+    create_opts = qemu_opts_append(create_opts, drv->create_opts);
+    create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
 
     /* Create parameter list with default values */
-    param = parse_option_parameters("", create_options, param);
-
-    set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size);
+    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
+    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, img_size);
 
     /* Parse -o options */
     if (options) {
-        param = parse_option_parameters(options, create_options, param);
-        if (param == NULL) {
-            error_setg(errp, "Invalid options for file format '%s'.", fmt);
+        if (qemu_opts_do_parse(opts, options, NULL) != 0) {
+            error_setg(errp, "Invalid options for file format '%s'", fmt);
             goto out;
         }
     }
 
     if (base_filename) {
-        if (set_option_parameter(param, BLOCK_OPT_BACKING_FILE,
-                                 base_filename)) {
+        if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) {
             error_setg(errp, "Backing file not supported for file format '%s'",
                        fmt);
             goto out;
@@ -5568,37 +5562,37 @@ void bdrv_img_create(const char *filename, const char *fmt,
     }
 
     if (base_fmt) {
-        if (set_option_parameter(param, BLOCK_OPT_BACKING_FMT, base_fmt)) {
+        if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) {
             error_setg(errp, "Backing file format not supported for file "
                              "format '%s'", fmt);
             goto out;
         }
     }
 
-    backing_file = get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
-    if (backing_file && backing_file->value.s) {
-        if (!strcmp(filename, backing_file->value.s)) {
+    backing_file = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
+    if (backing_file) {
+        if (!strcmp(filename, backing_file)) {
             error_setg(errp, "Error: Trying to create an image with the "
                              "same filename as the backing file");
             goto out;
         }
     }
 
-    backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT);
-    if (backing_fmt && backing_fmt->value.s) {
-        backing_drv = bdrv_find_format(backing_fmt->value.s);
+    backing_fmt = qemu_opt_get(opts, BLOCK_OPT_BACKING_FMT);
+    if (backing_fmt) {
+        backing_drv = bdrv_find_format(backing_fmt);
         if (!backing_drv) {
             error_setg(errp, "Unknown backing file format '%s'",
-                       backing_fmt->value.s);
+                       backing_fmt);
             goto out;
         }
     }
 
     // The size for the image must always be specified, with one exception:
     // If we are using a backing file, we can obtain the size from there
-    size = get_option_parameter(param, BLOCK_OPT_SIZE);
-    if (size && size->value.n == -1) {
-        if (backing_file && backing_file->value.s) {
+    size = qemu_opt_get_size(opts, BLOCK_OPT_SIZE, 0);
+    if (size == -1) {
+        if (backing_file) {
             BlockDriverState *bs;
             uint64_t size;
             char buf[32];
@@ -5609,11 +5603,11 @@ void bdrv_img_create(const char *filename, const char *fmt,
                 flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING);
 
             bs = NULL;
-            ret = bdrv_open(&bs, backing_file->value.s, NULL, NULL, back_flags,
+            ret = bdrv_open(&bs, backing_file, NULL, NULL, back_flags,
                             backing_drv, &local_err);
             if (ret < 0) {
                 error_setg_errno(errp, -ret, "Could not open '%s': %s",
-                                 backing_file->value.s,
+                                 backing_file,
                                  error_get_pretty(local_err));
                 error_free(local_err);
                 local_err = NULL;
@@ -5623,7 +5617,7 @@ void bdrv_img_create(const char *filename, const char *fmt,
             size *= 512;
 
             snprintf(buf, sizeof(buf), "%" PRId64, size);
-            set_option_parameter(param, BLOCK_OPT_SIZE, buf);
+            qemu_opt_set_number(opts, BLOCK_OPT_SIZE, size);
 
             bdrv_unref(bs);
         } else {
@@ -5634,16 +5628,18 @@ void bdrv_img_create(const char *filename, const char *fmt,
 
     if (!quiet) {
         printf("Formatting '%s', fmt=%s ", filename, fmt);
-        print_option_parameters(param);
+        qemu_opts_print(opts);
         puts("");
     }
-    ret = bdrv_create(drv, filename, param, &local_err);
+
+    ret = bdrv_create(drv, filename, opts, &local_err);
+
     if (ret == -EFBIG) {
         /* This is generally a better message than whatever the driver would
          * deliver (especially because of the cluster_size_hint), since that
          * is most probably not much different from "image too large". */
         const char *cluster_size_hint = "";
-        if (get_option_parameter(create_options, BLOCK_OPT_CLUSTER_SIZE)) {
+        if (qemu_opt_get_size(opts, BLOCK_OPT_CLUSTER_SIZE, 0)) {
             cluster_size_hint = " (try using a larger cluster size)";
         }
         error_setg(errp, "The image size is too large for file format '%s'"
@@ -5653,9 +5649,8 @@ void bdrv_img_create(const char *filename, const char *fmt,
     }
 
 out:
-    free_option_parameters(create_options);
-    free_option_parameters(param);
-
+    qemu_opts_del(opts);
+    qemu_opts_free(create_opts);
     if (local_err) {
         error_propagate(errp, local_err);
     }
@@ -5731,12 +5726,12 @@ void bdrv_add_before_write_notifier(BlockDriverState *bs,
     notifier_with_return_list_add(&bs->before_write_notifiers, notifier);
 }
 
-int bdrv_amend_options(BlockDriverState *bs, QEMUOptionParameter *options)
+int bdrv_amend_options(BlockDriverState *bs, QemuOpts *opts)
 {
-    if (bs->drv->bdrv_amend_options == NULL) {
+    if (!bs->drv->bdrv_amend_options) {
         return -ENOTSUP;
     }
-    return bs->drv->bdrv_amend_options(bs, options);
+    return bs->drv->bdrv_amend_options(bs, opts);
 }
 
 /* This function will be called by the bdrv_recurse_is_first_non_filter method
diff --git a/block/cow.c b/block/cow.c
index 164759f..a05a92c 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -324,31 +324,24 @@ static void cow_close(BlockDriverState *bs)
 {
 }
 
-static int cow_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int cow_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     struct cow_header_v2 cow_header;
     struct stat st;
     int64_t image_sectors = 0;
-    const char *image_filename = NULL;
+    char *image_filename = NULL;
     Error *local_err = NULL;
     int ret;
     BlockDriverState *cow_bs;
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            image_sectors = options->value.n / 512;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            image_filename = options->value.s;
-        }
-        options++;
-    }
+    image_sectors = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
+    image_filename = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
 
-    ret = bdrv_create_file(filename, options, &local_err);
+    ret = bdrv_create_file(filename, opts, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
-        return ret;
+        goto exit;
     }
 
     cow_bs = NULL;
@@ -356,7 +349,7 @@ static int cow_create(const char *filename, QEMUOptionParameter *options,
                     BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
-        return ret;
+        goto exit;
     }
 
     memset(&cow_header, 0, sizeof(cow_header));
@@ -389,22 +382,27 @@ static int cow_create(const char *filename, QEMUOptionParameter *options,
     }
 
 exit:
+    g_free(image_filename);
     bdrv_unref(cow_bs);
     return ret;
 }
 
-static QEMUOptionParameter cow_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    },
-    { NULL }
+static QemuOptsList cow_create_opts = {
+    .name = "cow-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(cow_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_cow = {
@@ -421,7 +419,7 @@ static BlockDriver bdrv_cow = {
     .bdrv_write             = cow_co_write,
     .bdrv_co_get_block_status   = cow_co_get_block_status,
 
-    .create_options = cow_create_options,
+    .create_opts    = &cow_create_opts,
 };
 
 static void bdrv_cow_init(void)
diff --git a/block/curl.c b/block/curl.c
index 8c84141..79ff2f1 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -440,10 +440,8 @@ static void curl_detach_aio_context(BlockDriverState *bs)
             curl_easy_cleanup(s->states[i].curl);
             s->states[i].curl = NULL;
         }
-        if (s->states[i].orig_buf) {
-            g_free(s->states[i].orig_buf);
-            s->states[i].orig_buf = NULL;
-        }
+        g_free(s->states[i].orig_buf);
+        s->states[i].orig_buf = NULL;
     }
     if (s->multi) {
         curl_multi_cleanup(s->multi);
@@ -638,8 +636,7 @@ static void curl_readv_bh_cb(void *p)
     acb->end = (acb->nb_sectors * SECTOR_SIZE);
 
     state->buf_off = 0;
-    if (state->orig_buf)
-        g_free(state->orig_buf);
+    g_free(state->orig_buf);
     state->buf_start = start;
     state->buf_len = acb->end + s->readahead_size;
     end = MIN(start + state->buf_len, s->len) - 1;
diff --git a/block/gluster.c b/block/gluster.c
index 114689e..9274dea 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -478,13 +478,14 @@ static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset,
 #endif
 
 static int qemu_gluster_create(const char *filename,
-        QEMUOptionParameter *options, Error **errp)
+                               QemuOpts *opts, Error **errp)
 {
     struct glfs *glfs;
     struct glfs_fd *fd;
     int ret = 0;
     int prealloc = 0;
     int64_t total_size = 0;
+    char *tmp = NULL;
     GlusterConf *gconf = g_malloc0(sizeof(GlusterConf));
 
     glfs = qemu_gluster_init(gconf, filename, errp);
@@ -493,24 +494,21 @@ static int qemu_gluster_create(const char *filename,
         goto out;
     }
 
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n / BDRV_SECTOR_SIZE;
-        } else if (!strcmp(options->name, BLOCK_OPT_PREALLOC)) {
-            if (!options->value.s || !strcmp(options->value.s, "off")) {
-                prealloc = 0;
-            } else if (!strcmp(options->value.s, "full") &&
-                    gluster_supports_zerofill()) {
-                prealloc = 1;
-            } else {
-                error_setg(errp, "Invalid preallocation mode: '%s'"
-                    " or GlusterFS doesn't support zerofill API",
-                           options->value.s);
-                ret = -EINVAL;
-                goto out;
-            }
-        }
-        options++;
+    total_size =
+        qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
+
+    tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
+    if (!tmp || !strcmp(tmp, "off")) {
+        prealloc = 0;
+    } else if (!strcmp(tmp, "full") &&
+               gluster_supports_zerofill()) {
+        prealloc = 1;
+    } else {
+        error_setg(errp, "Invalid preallocation mode: '%s'"
+            " or GlusterFS doesn't support zerofill API",
+            tmp);
+        ret = -EINVAL;
+        goto out;
     }
 
     fd = glfs_creat(glfs, gconf->image,
@@ -532,6 +530,7 @@ static int qemu_gluster_create(const char *filename,
         }
     }
 out:
+    g_free(tmp);
     qemu_gluster_gconf_free(gconf);
     if (glfs) {
         glfs_fini(glfs);
@@ -698,18 +697,22 @@ static int qemu_gluster_has_zero_init(BlockDriverState *bs)
     return 0;
 }
 
-static QEMUOptionParameter qemu_gluster_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_PREALLOC,
-        .type = OPT_STRING,
-        .help = "Preallocation mode (allowed values: off, full)"
-    },
-    { NULL }
+static QemuOptsList qemu_gluster_create_opts = {
+    .name = "qemu-gluster-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_PREALLOC,
+            .type = QEMU_OPT_STRING,
+            .help = "Preallocation mode (allowed values: off, full)"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_gluster = {
@@ -736,7 +739,7 @@ static BlockDriver bdrv_gluster = {
 #ifdef CONFIG_GLUSTERFS_ZEROFILL
     .bdrv_co_write_zeroes         = qemu_gluster_co_write_zeroes,
 #endif
-    .create_options               = qemu_gluster_create_options,
+    .create_opts                  = &qemu_gluster_create_opts,
 };
 
 static BlockDriver bdrv_gluster_tcp = {
@@ -763,7 +766,7 @@ static BlockDriver bdrv_gluster_tcp = {
 #ifdef CONFIG_GLUSTERFS_ZEROFILL
     .bdrv_co_write_zeroes         = qemu_gluster_co_write_zeroes,
 #endif
-    .create_options               = qemu_gluster_create_options,
+    .create_opts                  = &qemu_gluster_create_opts,
 };
 
 static BlockDriver bdrv_gluster_unix = {
@@ -790,7 +793,7 @@ static BlockDriver bdrv_gluster_unix = {
 #ifdef CONFIG_GLUSTERFS_ZEROFILL
     .bdrv_co_write_zeroes         = qemu_gluster_co_write_zeroes,
 #endif
-    .create_options               = qemu_gluster_create_options,
+    .create_opts                  = &qemu_gluster_create_opts,
 };
 
 static BlockDriver bdrv_gluster_rdma = {
@@ -817,7 +820,7 @@ static BlockDriver bdrv_gluster_rdma = {
 #ifdef CONFIG_GLUSTERFS_ZEROFILL
     .bdrv_co_write_zeroes         = qemu_gluster_co_write_zeroes,
 #endif
-    .create_options               = qemu_gluster_create_options,
+    .create_opts                  = &qemu_gluster_create_opts,
 };
 
 static void bdrv_gluster_init(void)
diff --git a/block/iscsi.c b/block/iscsi.c
index 877b877..6f87605 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1434,9 +1434,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
 
 out:
     qemu_opts_del(opts);
-    if (initiator_name != NULL) {
-        g_free(initiator_name);
-    }
+    g_free(initiator_name);
     if (iscsi_url != NULL) {
         iscsi_destroy_url(iscsi_url);
     }
@@ -1532,8 +1530,7 @@ static int iscsi_truncate(BlockDriverState *bs, int64_t offset)
     return 0;
 }
 
-static int iscsi_create(const char *filename, QEMUOptionParameter *options,
-                        Error **errp)
+static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int ret = 0;
     int64_t total_size = 0;
@@ -1544,13 +1541,8 @@ static int iscsi_create(const char *filename, QEMUOptionParameter *options,
     bs = bdrv_new("", &error_abort);
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, "size")) {
-            total_size = options->value.n / BDRV_SECTOR_SIZE;
-        }
-        options++;
-    }
-
+    total_size =
+        qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
     bs->opaque = g_malloc0(sizeof(struct IscsiLun));
     iscsilun = bs->opaque;
 
@@ -1592,13 +1584,17 @@ static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
     return 0;
 }
 
-static QEMUOptionParameter iscsi_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    { NULL }
+static QemuOptsList iscsi_create_opts = {
+    .name = "iscsi-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(iscsi_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_iscsi = {
@@ -1610,7 +1606,7 @@ static BlockDriver bdrv_iscsi = {
     .bdrv_file_open  = iscsi_open,
     .bdrv_close      = iscsi_close,
     .bdrv_create     = iscsi_create,
-    .create_options  = iscsi_create_options,
+    .create_opts     = &iscsi_create_opts,
     .bdrv_reopen_prepare  = iscsi_reopen_prepare,
 
     .bdrv_getlength  = iscsi_getlength,
diff --git a/block/nfs.c b/block/nfs.c
index bd9177f..ec43201 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -95,6 +95,7 @@ static void nfs_co_init_task(NFSClient *client, NFSRPC *task)
 static void nfs_co_generic_bh_cb(void *opaque)
 {
     NFSRPC *task = opaque;
+    task->complete = 1;
     qemu_bh_delete(task->bh);
     qemu_coroutine_enter(task->co, NULL);
 }
@@ -104,7 +105,6 @@ nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
                   void *private_data)
 {
     NFSRPC *task = private_data;
-    task->complete = 1;
     task->ret = ret;
     if (task->ret > 0 && task->iov) {
         if (task->ret <= task->iov->size) {
@@ -123,6 +123,8 @@ nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
         task->bh = aio_bh_new(task->client->aio_context,
                               nfs_co_generic_bh_cb, task);
         qemu_bh_schedule(task->bh);
+    } else {
+        task->complete = 1;
     }
 }
 
@@ -389,8 +391,7 @@ static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags,
     return 0;
 }
 
-static int nfs_file_create(const char *url, QEMUOptionParameter *options,
-                           Error **errp)
+static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
 {
     int ret = 0;
     int64_t total_size = 0;
@@ -399,12 +400,7 @@ static int nfs_file_create(const char *url, QEMUOptionParameter *options,
     client->aio_context = qemu_get_aio_context();
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, "size")) {
-            total_size = options->value.n;
-        }
-        options++;
-    }
+    total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
 
     ret = nfs_client_open(client, url, O_CREAT, errp);
     if (ret < 0) {
diff --git a/block/qcow.c b/block/qcow.c
index 7fd57d7..1f2bac8 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -693,35 +693,29 @@ static void qcow_close(BlockDriverState *bs)
     error_free(s->migration_blocker);
 }
 
-static int qcow_create(const char *filename, QEMUOptionParameter *options,
-                       Error **errp)
+static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int header_size, backing_filename_len, l1_size, shift, i;
     QCowHeader header;
     uint8_t *tmp;
     int64_t total_size = 0;
-    const char *backing_file = NULL;
+    char *backing_file = NULL;
     int flags = 0;
     Error *local_err = NULL;
     int ret;
     BlockDriverState *qcow_bs;
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n / 512;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            backing_file = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_ENCRYPT)) {
-            flags |= options->value.n ? BLOCK_FLAG_ENCRYPT : 0;
-        }
-        options++;
+    total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
+    backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {
+        flags |= BLOCK_FLAG_ENCRYPT;
     }
 
-    ret = bdrv_create_file(filename, options, &local_err);
+    ret = bdrv_create_file(filename, opts, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
-        return ret;
+        goto cleanup;
     }
 
     qcow_bs = NULL;
@@ -729,7 +723,7 @@ static int qcow_create(const char *filename, QEMUOptionParameter *options,
                     BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
-        return ret;
+        goto cleanup;
     }
 
     ret = bdrv_truncate(qcow_bs, 0);
@@ -800,6 +794,8 @@ static int qcow_create(const char *filename, QEMUOptionParameter *options,
     ret = 0;
 exit:
     bdrv_unref(qcow_bs);
+cleanup:
+    g_free(backing_file);
     return ret;
 }
 
@@ -912,24 +908,28 @@ static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
     return 0;
 }
 
-
-static QEMUOptionParameter qcow_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    },
-    {
-        .name = BLOCK_OPT_ENCRYPT,
-        .type = OPT_FLAG,
-        .help = "Encrypt the image"
-    },
-    { NULL }
+static QemuOptsList qcow_create_opts = {
+    .name = "qcow-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qcow_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        {
+            .name = BLOCK_OPT_ENCRYPT,
+            .type = QEMU_OPT_BOOL,
+            .help = "Encrypt the image",
+            .def_value_str = "off"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_qcow = {
@@ -938,8 +938,8 @@ static BlockDriver bdrv_qcow = {
     .bdrv_probe		= qcow_probe,
     .bdrv_open		= qcow_open,
     .bdrv_close		= qcow_close,
-    .bdrv_reopen_prepare = qcow_reopen_prepare,
-    .bdrv_create	= qcow_create,
+    .bdrv_reopen_prepare    = qcow_reopen_prepare,
+    .bdrv_create            = qcow_create,
     .bdrv_has_zero_init     = bdrv_has_zero_init_1,
 
     .bdrv_co_readv          = qcow_co_readv,
@@ -951,7 +951,7 @@ static BlockDriver bdrv_qcow = {
     .bdrv_write_compressed  = qcow_write_compressed,
     .bdrv_get_info          = qcow_get_info,
 
-    .create_options = qcow_create_options,
+    .create_opts            = &qcow_create_opts,
 };
 
 static void bdrv_qcow_init(void)
diff --git a/block/qcow2.c b/block/qcow2.c
index a54d2ba..b9d2fa6 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -31,6 +31,7 @@
 #include "qapi/qmp/qerror.h"
 #include "qapi/qmp/qbool.h"
 #include "trace.h"
+#include "qemu/option_int.h"
 
 /*
   Differences with QCOW:
@@ -1594,7 +1595,7 @@ static int preallocate(BlockDriverState *bs)
 static int qcow2_create2(const char *filename, int64_t total_size,
                          const char *backing_file, const char *backing_format,
                          int flags, size_t cluster_size, int prealloc,
-                         QEMUOptionParameter *options, int version,
+                         QemuOpts *opts, int version,
                          Error **errp)
 {
     /* Calculate cluster_bits */
@@ -1626,7 +1627,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     Error *local_err = NULL;
     int ret;
 
-    ret = bdrv_create_file(filename, options, &local_err);
+    ret = bdrv_create_file(filename, opts, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return ret;
@@ -1762,11 +1763,11 @@ out:
     return ret;
 }
 
-static int qcow2_create(const char *filename, QEMUOptionParameter *options,
-                        Error **errp)
+static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
 {
-    const char *backing_file = NULL;
-    const char *backing_fmt = NULL;
+    char *backing_file = NULL;
+    char *backing_fmt = NULL;
+    char *buf = NULL;
     uint64_t sectors = 0;
     int flags = 0;
     size_t cluster_size = DEFAULT_CLUSTER_SIZE;
@@ -1776,64 +1777,66 @@ static int qcow2_create(const char *filename, QEMUOptionParameter *options,
     int ret;
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            sectors = options->value.n / 512;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            backing_file = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FMT)) {
-            backing_fmt = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_ENCRYPT)) {
-            flags |= options->value.n ? BLOCK_FLAG_ENCRYPT : 0;
-        } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) {
-            if (options->value.n) {
-                cluster_size = options->value.n;
-            }
-        } else if (!strcmp(options->name, BLOCK_OPT_PREALLOC)) {
-            if (!options->value.s || !strcmp(options->value.s, "off")) {
-                prealloc = 0;
-            } else if (!strcmp(options->value.s, "metadata")) {
-                prealloc = 1;
-            } else {
-                error_setg(errp, "Invalid preallocation mode: '%s'",
-                           options->value.s);
-                return -EINVAL;
-            }
-        } else if (!strcmp(options->name, BLOCK_OPT_COMPAT_LEVEL)) {
-            if (!options->value.s) {
-                /* keep the default */
-            } else if (!strcmp(options->value.s, "0.10")) {
-                version = 2;
-            } else if (!strcmp(options->value.s, "1.1")) {
-                version = 3;
-            } else {
-                error_setg(errp, "Invalid compatibility level: '%s'",
-                           options->value.s);
-                return -EINVAL;
-            }
-        } else if (!strcmp(options->name, BLOCK_OPT_LAZY_REFCOUNTS)) {
-            flags |= options->value.n ? BLOCK_FLAG_LAZY_REFCOUNTS : 0;
-        }
-        options++;
+    sectors = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
+    backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+    backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {
+        flags |= BLOCK_FLAG_ENCRYPT;
+    }
+    cluster_size = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE,
+                                         DEFAULT_CLUSTER_SIZE);
+    buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
+    if (!buf || !strcmp(buf, "off")) {
+        prealloc = 0;
+    } else if (!strcmp(buf, "metadata")) {
+        prealloc = 1;
+    } else {
+        error_setg(errp, "Invalid preallocation mode: '%s'", buf);
+        ret = -EINVAL;
+        goto finish;
+    }
+    g_free(buf);
+    buf = qemu_opt_get_del(opts, BLOCK_OPT_COMPAT_LEVEL);
+    if (!buf) {
+        /* keep the default */
+    } else if (!strcmp(buf, "0.10")) {
+        version = 2;
+    } else if (!strcmp(buf, "1.1")) {
+        version = 3;
+    } else {
+        error_setg(errp, "Invalid compatibility level: '%s'", buf);
+        ret = -EINVAL;
+        goto finish;
+    }
+
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_LAZY_REFCOUNTS, false)) {
+        flags |= BLOCK_FLAG_LAZY_REFCOUNTS;
     }
 
     if (backing_file && prealloc) {
         error_setg(errp, "Backing file and preallocation cannot be used at "
                    "the same time");
-        return -EINVAL;
+        ret = -EINVAL;
+        goto finish;
     }
 
     if (version < 3 && (flags & BLOCK_FLAG_LAZY_REFCOUNTS)) {
         error_setg(errp, "Lazy refcounts only supported with compatibility "
                    "level 1.1 and above (use compat=1.1 or greater)");
-        return -EINVAL;
+        ret = -EINVAL;
+        goto finish;
     }
 
     ret = qcow2_create2(filename, sectors, backing_file, backing_fmt, flags,
-                        cluster_size, prealloc, options, version, &local_err);
+                        cluster_size, prealloc, opts, version, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
     }
+
+finish:
+    g_free(backing_file);
+    g_free(backing_fmt);
+    g_free(buf);
     return ret;
 }
 
@@ -2198,64 +2201,72 @@ static int qcow2_downgrade(BlockDriverState *bs, int target_version)
     return 0;
 }
 
-static int qcow2_amend_options(BlockDriverState *bs,
-                               QEMUOptionParameter *options)
+static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts)
 {
     BDRVQcowState *s = bs->opaque;
     int old_version = s->qcow_version, new_version = old_version;
     uint64_t new_size = 0;
     const char *backing_file = NULL, *backing_format = NULL;
     bool lazy_refcounts = s->use_lazy_refcounts;
+    const char *compat = NULL;
+    uint64_t cluster_size = s->cluster_size;
+    bool encrypt;
     int ret;
-    int i;
+    QemuOptDesc *desc = opts->list->desc;
 
-    for (i = 0; options[i].name; i++)
-    {
-        if (!options[i].assigned) {
+    while (desc && desc->name) {
+        if (!qemu_opt_find(opts, desc->name)) {
             /* only change explicitly defined options */
+            desc++;
             continue;
         }
 
-        if (!strcmp(options[i].name, "compat")) {
-            if (!options[i].value.s) {
+        if (!strcmp(desc->name, "compat")) {
+            compat = qemu_opt_get(opts, "compat");
+            if (!compat) {
                 /* preserve default */
-            } else if (!strcmp(options[i].value.s, "0.10")) {
+            } else if (!strcmp(compat, "0.10")) {
                 new_version = 2;
-            } else if (!strcmp(options[i].value.s, "1.1")) {
+            } else if (!strcmp(compat, "1.1")) {
                 new_version = 3;
             } else {
-                fprintf(stderr, "Unknown compatibility level %s.\n",
-                        options[i].value.s);
+                fprintf(stderr, "Unknown compatibility level %s.\n", compat);
                 return -EINVAL;
             }
-        } else if (!strcmp(options[i].name, "preallocation")) {
+        } else if (!strcmp(desc->name, "preallocation")) {
             fprintf(stderr, "Cannot change preallocation mode.\n");
             return -ENOTSUP;
-        } else if (!strcmp(options[i].name, "size")) {
-            new_size = options[i].value.n;
-        } else if (!strcmp(options[i].name, "backing_file")) {
-            backing_file = options[i].value.s;
-        } else if (!strcmp(options[i].name, "backing_fmt")) {
-            backing_format = options[i].value.s;
-        } else if (!strcmp(options[i].name, "encryption")) {
-            if ((options[i].value.n != !!s->crypt_method)) {
+        } else if (!strcmp(desc->name, "size")) {
+            new_size = qemu_opt_get_size(opts, "size", 0);
+        } else if (!strcmp(desc->name, "backing_file")) {
+            backing_file = qemu_opt_get(opts, "backing_file");
+        } else if (!strcmp(desc->name, "backing_fmt")) {
+            backing_format = qemu_opt_get(opts, "backing_fmt");
+        } else if (!strcmp(desc->name, "encryption")) {
+            encrypt = qemu_opt_get_bool(opts, "encryption", s->crypt_method);
+            if (encrypt != !!s->crypt_method) {
                 fprintf(stderr, "Changing the encryption flag is not "
                         "supported.\n");
                 return -ENOTSUP;
             }
-        } else if (!strcmp(options[i].name, "cluster_size")) {
-            if (options[i].value.n != s->cluster_size) {
+        } else if (!strcmp(desc->name, "cluster_size")) {
+            cluster_size = qemu_opt_get_size(opts, "cluster_size",
+                                             cluster_size);
+            if (cluster_size != s->cluster_size) {
                 fprintf(stderr, "Changing the cluster size is not "
                         "supported.\n");
                 return -ENOTSUP;
             }
-        } else if (!strcmp(options[i].name, "lazy_refcounts")) {
-            lazy_refcounts = options[i].value.n;
+        } else if (!strcmp(desc->name, "lazy_refcounts")) {
+            lazy_refcounts = qemu_opt_get_bool(opts, "lazy_refcounts",
+                                               lazy_refcounts);
         } else {
             /* if this assertion fails, this probably means a new option was
              * added without having it covered here */
             assert(false);
         }
+
+        desc++;
     }
 
     if (new_version != old_version) {
@@ -2324,49 +2335,55 @@ static int qcow2_amend_options(BlockDriverState *bs,
     return 0;
 }
 
-static QEMUOptionParameter qcow2_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_COMPAT_LEVEL,
-        .type = OPT_STRING,
-        .help = "Compatibility level (0.10 or 1.1)"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FMT,
-        .type = OPT_STRING,
-        .help = "Image format of the base image"
-    },
-    {
-        .name = BLOCK_OPT_ENCRYPT,
-        .type = OPT_FLAG,
-        .help = "Encrypt the image"
-    },
-    {
-        .name = BLOCK_OPT_CLUSTER_SIZE,
-        .type = OPT_SIZE,
-        .help = "qcow2 cluster size",
-        .value = { .n = DEFAULT_CLUSTER_SIZE },
-    },
-    {
-        .name = BLOCK_OPT_PREALLOC,
-        .type = OPT_STRING,
-        .help = "Preallocation mode (allowed values: off, metadata)"
-    },
-    {
-        .name = BLOCK_OPT_LAZY_REFCOUNTS,
-        .type = OPT_FLAG,
-        .help = "Postpone refcount updates",
-    },
-    { NULL }
+static QemuOptsList qcow2_create_opts = {
+    .name = "qcow2-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qcow2_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_COMPAT_LEVEL,
+            .type = QEMU_OPT_STRING,
+            .help = "Compatibility level (0.10 or 1.1)"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FMT,
+            .type = QEMU_OPT_STRING,
+            .help = "Image format of the base image"
+        },
+        {
+            .name = BLOCK_OPT_ENCRYPT,
+            .type = QEMU_OPT_BOOL,
+            .help = "Encrypt the image",
+            .def_value_str = "off"
+        },
+        {
+            .name = BLOCK_OPT_CLUSTER_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "qcow2 cluster size",
+            .def_value_str = stringify(DEFAULT_CLUSTER_SIZE)
+        },
+        {
+            .name = BLOCK_OPT_PREALLOC,
+            .type = QEMU_OPT_STRING,
+            .help = "Preallocation mode (allowed values: off, metadata)"
+        },
+        {
+            .name = BLOCK_OPT_LAZY_REFCOUNTS,
+            .type = QEMU_OPT_BOOL,
+            .help = "Postpone refcount updates",
+            .def_value_str = "off"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_qcow2 = {
@@ -2394,8 +2411,8 @@ static BlockDriver bdrv_qcow2 = {
     .bdrv_snapshot_goto     = qcow2_snapshot_goto,
     .bdrv_snapshot_delete   = qcow2_snapshot_delete,
     .bdrv_snapshot_list     = qcow2_snapshot_list,
-    .bdrv_snapshot_load_tmp     = qcow2_snapshot_load_tmp,
-    .bdrv_get_info      = qcow2_get_info,
+    .bdrv_snapshot_load_tmp = qcow2_snapshot_load_tmp,
+    .bdrv_get_info          = qcow2_get_info,
     .bdrv_get_specific_info = qcow2_get_specific_info,
 
     .bdrv_save_vmstate    = qcow2_save_vmstate,
@@ -2406,9 +2423,9 @@ static BlockDriver bdrv_qcow2 = {
     .bdrv_refresh_limits        = qcow2_refresh_limits,
     .bdrv_invalidate_cache      = qcow2_invalidate_cache,
 
-    .create_options = qcow2_create_options,
-    .bdrv_check = qcow2_check,
-    .bdrv_amend_options = qcow2_amend_options,
+    .create_opts         = &qcow2_create_opts,
+    .bdrv_check          = qcow2_check,
+    .bdrv_amend_options  = qcow2_amend_options,
 };
 
 static void bdrv_qcow2_init(void)
diff --git a/block/qed.c b/block/qed.c
index 79f5bd3..092e6fb 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -641,55 +641,53 @@ out:
     return ret;
 }
 
-static int bdrv_qed_create(const char *filename, QEMUOptionParameter *options,
-                           Error **errp)
+static int bdrv_qed_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     uint64_t image_size = 0;
     uint32_t cluster_size = QED_DEFAULT_CLUSTER_SIZE;
     uint32_t table_size = QED_DEFAULT_TABLE_SIZE;
-    const char *backing_file = NULL;
-    const char *backing_fmt = NULL;
-
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            image_size = options->value.n;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            backing_file = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FMT)) {
-            backing_fmt = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) {
-            if (options->value.n) {
-                cluster_size = options->value.n;
-            }
-        } else if (!strcmp(options->name, BLOCK_OPT_TABLE_SIZE)) {
-            if (options->value.n) {
-                table_size = options->value.n;
-            }
-        }
-        options++;
-    }
+    char *backing_file = NULL;
+    char *backing_fmt = NULL;
+    int ret;
+
+    image_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+    backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
+    cluster_size = qemu_opt_get_size_del(opts,
+                                         BLOCK_OPT_CLUSTER_SIZE,
+                                         QED_DEFAULT_CLUSTER_SIZE);
+    table_size = qemu_opt_get_size_del(opts, BLOCK_OPT_TABLE_SIZE,
+                                       QED_DEFAULT_TABLE_SIZE);
 
     if (!qed_is_cluster_size_valid(cluster_size)) {
         error_setg(errp, "QED cluster size must be within range [%u, %u] "
                          "and power of 2",
                    QED_MIN_CLUSTER_SIZE, QED_MAX_CLUSTER_SIZE);
-        return -EINVAL;
+        ret = -EINVAL;
+        goto finish;
     }
     if (!qed_is_table_size_valid(table_size)) {
         error_setg(errp, "QED table size must be within range [%u, %u] "
                          "and power of 2",
                    QED_MIN_TABLE_SIZE, QED_MAX_TABLE_SIZE);
-        return -EINVAL;
+        ret = -EINVAL;
+        goto finish;
     }
     if (!qed_is_image_size_valid(image_size, cluster_size, table_size)) {
         error_setg(errp, "QED image size must be a non-zero multiple of "
                          "cluster size and less than %" PRIu64 " bytes",
                    qed_max_image_size(cluster_size, table_size));
-        return -EINVAL;
+        ret = -EINVAL;
+        goto finish;
     }
 
-    return qed_create(filename, cluster_size, image_size, table_size,
-                      backing_file, backing_fmt, errp);
+    ret = qed_create(filename, cluster_size, image_size, table_size,
+                     backing_file, backing_fmt, errp);
+
+finish:
+    g_free(backing_file);
+    g_free(backing_fmt);
+    return ret;
 }
 
 typedef struct {
@@ -1616,36 +1614,44 @@ static int bdrv_qed_check(BlockDriverState *bs, BdrvCheckResult *result,
     return qed_check(s, result, !!fix);
 }
 
-static QEMUOptionParameter qed_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size (in bytes)"
-    }, {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    }, {
-        .name = BLOCK_OPT_BACKING_FMT,
-        .type = OPT_STRING,
-        .help = "Image format of the base image"
-    }, {
-        .name = BLOCK_OPT_CLUSTER_SIZE,
-        .type = OPT_SIZE,
-        .help = "Cluster size (in bytes)",
-        .value = { .n = QED_DEFAULT_CLUSTER_SIZE },
-    }, {
-        .name = BLOCK_OPT_TABLE_SIZE,
-        .type = OPT_SIZE,
-        .help = "L1/L2 table size (in clusters)"
-    },
-    { /* end of list */ }
+static QemuOptsList qed_create_opts = {
+    .name = "qed-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qed_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FMT,
+            .type = QEMU_OPT_STRING,
+            .help = "Image format of the base image"
+        },
+        {
+            .name = BLOCK_OPT_CLUSTER_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Cluster size (in bytes)",
+            .def_value_str = stringify(QED_DEFAULT_CLUSTER_SIZE)
+        },
+        {
+            .name = BLOCK_OPT_TABLE_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "L1/L2 table size (in clusters)"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_qed = {
     .format_name              = "qed",
     .instance_size            = sizeof(BDRVQEDState),
-    .create_options           = qed_create_options,
+    .create_opts              = &qed_create_opts,
 
     .bdrv_probe               = bdrv_qed_probe,
     .bdrv_rebind              = bdrv_qed_rebind,
diff --git a/block/qed.h b/block/qed.h
index 5d65bea..b024751 100644
--- a/block/qed.h
+++ b/block/qed.h
@@ -43,7 +43,7 @@
  *
  * All fields are little-endian on disk.
  */
-
+#define  QED_DEFAULT_CLUSTER_SIZE  65536
 enum {
     QED_MAGIC = 'Q' | 'E' << 8 | 'D' << 16 | '\0' << 24,
 
@@ -69,7 +69,6 @@ enum {
      */
     QED_MIN_CLUSTER_SIZE = 4 * 1024, /* in bytes */
     QED_MAX_CLUSTER_SIZE = 64 * 1024 * 1024,
-    QED_DEFAULT_CLUSTER_SIZE = 64 * 1024,
 
     /* Allocated clusters are tracked using a 2-level pagetable.  Table size is
      * a multiple of clusters so large maximum image sizes can be supported
diff --git a/block/raw-posix.c b/block/raw-posix.c
index c2b30be..dacf4fb 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -1273,8 +1273,7 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
     return (int64_t)st.st_blocks * 512;
 }
 
-static int raw_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int fd;
     int result = 0;
@@ -1283,12 +1282,8 @@ static int raw_create(const char *filename, QEMUOptionParameter *options,
     strstart(filename, "file:", &filename);
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n / BDRV_SECTOR_SIZE;
-        }
-        options++;
-    }
+    total_size =
+        qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
 
     fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
                    0644);
@@ -1473,13 +1468,17 @@ static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
     return 0;
 }
 
-static QEMUOptionParameter raw_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    { NULL }
+static QemuOptsList raw_create_opts = {
+    .name = "raw-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_file = {
@@ -1514,7 +1513,7 @@ static BlockDriver bdrv_file = {
     .bdrv_detach_aio_context = raw_detach_aio_context,
     .bdrv_attach_aio_context = raw_attach_aio_context,
 
-    .create_options = raw_create_options,
+    .create_opts = &raw_create_opts,
 };
 
 /***********************************************/
@@ -1835,7 +1834,7 @@ static coroutine_fn int hdev_co_write_zeroes(BlockDriverState *bs,
     return -ENOTSUP;
 }
 
-static int hdev_create(const char *filename, QEMUOptionParameter *options,
+static int hdev_create(const char *filename, QemuOpts *opts,
                        Error **errp)
 {
     int fd;
@@ -1856,12 +1855,8 @@ static int hdev_create(const char *filename, QEMUOptionParameter *options,
     (void)has_prefix;
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, "size")) {
-            total_size = options->value.n / BDRV_SECTOR_SIZE;
-        }
-        options++;
-    }
+    total_size =
+        qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / BDRV_SECTOR_SIZE;
 
     fd = qemu_open(filename, O_WRONLY | O_BINARY);
     if (fd < 0) {
@@ -1898,8 +1893,8 @@ static BlockDriver bdrv_host_device = {
     .bdrv_reopen_prepare = raw_reopen_prepare,
     .bdrv_reopen_commit  = raw_reopen_commit,
     .bdrv_reopen_abort   = raw_reopen_abort,
-    .bdrv_create        = hdev_create,
-    .create_options     = raw_create_options,
+    .bdrv_create         = hdev_create,
+    .create_opts         = &raw_create_opts,
     .bdrv_co_write_zeroes = hdev_co_write_zeroes,
 
     .bdrv_aio_readv	= raw_aio_readv,
@@ -2045,8 +2040,8 @@ static BlockDriver bdrv_host_floppy = {
     .bdrv_reopen_prepare = raw_reopen_prepare,
     .bdrv_reopen_commit  = raw_reopen_commit,
     .bdrv_reopen_abort   = raw_reopen_abort,
-    .bdrv_create        = hdev_create,
-    .create_options     = raw_create_options,
+    .bdrv_create         = hdev_create,
+    .create_opts         = &raw_create_opts,
 
     .bdrv_aio_readv     = raw_aio_readv,
     .bdrv_aio_writev    = raw_aio_writev,
@@ -2173,8 +2168,8 @@ static BlockDriver bdrv_host_cdrom = {
     .bdrv_reopen_prepare = raw_reopen_prepare,
     .bdrv_reopen_commit  = raw_reopen_commit,
     .bdrv_reopen_abort   = raw_reopen_abort,
-    .bdrv_create        = hdev_create,
-    .create_options     = raw_create_options,
+    .bdrv_create         = hdev_create,
+    .create_opts         = &raw_create_opts,
 
     .bdrv_aio_readv     = raw_aio_readv,
     .bdrv_aio_writev    = raw_aio_writev,
@@ -2308,7 +2303,7 @@ static BlockDriver bdrv_host_cdrom = {
     .bdrv_reopen_commit  = raw_reopen_commit,
     .bdrv_reopen_abort   = raw_reopen_abort,
     .bdrv_create        = hdev_create,
-    .create_options     = raw_create_options,
+    .create_opts        = &raw_create_opts,
 
     .bdrv_aio_readv     = raw_aio_readv,
     .bdrv_aio_writev    = raw_aio_writev,
diff --git a/block/raw-win32.c b/block/raw-win32.c
index 324e818..902eab6 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -503,8 +503,7 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
     return st.st_size;
 }
 
-static int raw_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int fd;
     int64_t total_size = 0;
@@ -512,12 +511,8 @@ static int raw_create(const char *filename, QEMUOptionParameter *options,
     strstart(filename, "file:", &filename);
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n / 512;
-        }
-        options++;
-    }
+    total_size =
+        qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0) / 512;
 
     fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
                    0644);
@@ -531,13 +526,18 @@ static int raw_create(const char *filename, QEMUOptionParameter *options,
     return 0;
 }
 
-static QEMUOptionParameter raw_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    { NULL }
+
+static QemuOptsList raw_create_opts = {
+    .name = "raw-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_file = {
@@ -546,9 +546,9 @@ static BlockDriver bdrv_file = {
     .instance_size	= sizeof(BDRVRawState),
     .bdrv_needs_filename = true,
     .bdrv_parse_filename = raw_parse_filename,
-    .bdrv_file_open	= raw_open,
-    .bdrv_close		= raw_close,
-    .bdrv_create	= raw_create,
+    .bdrv_file_open     = raw_open,
+    .bdrv_close         = raw_close,
+    .bdrv_create        = raw_create,
     .bdrv_has_zero_init = bdrv_has_zero_init_1,
 
     .bdrv_aio_readv     = raw_aio_readv,
@@ -560,7 +560,7 @@ static BlockDriver bdrv_file = {
     .bdrv_get_allocated_file_size
                         = raw_get_allocated_file_size,
 
-    .create_options = raw_create_options,
+    .create_opts        = &raw_create_opts,
 };
 
 /***********************************************/
diff --git a/block/raw_bsd.c b/block/raw_bsd.c
index 01ea692..492f58d 100644
--- a/block/raw_bsd.c
+++ b/block/raw_bsd.c
@@ -29,13 +29,17 @@
 #include "block/block_int.h"
 #include "qemu/option.h"
 
-static QEMUOptionParameter raw_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    { 0 }
+static QemuOptsList raw_create_opts = {
+    .name = "raw-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        { /* end of list */ }
+    }
 };
 
 static int raw_reopen_prepare(BDRVReopenState *reopen_state,
@@ -139,13 +143,12 @@ static int raw_has_zero_init(BlockDriverState *bs)
     return bdrv_has_zero_init(bs->file);
 }
 
-static int raw_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     Error *local_err = NULL;
     int ret;
 
-    ret = bdrv_create_file(filename, options, &local_err);
+    ret = bdrv_create_file(filename, opts, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
     }
@@ -194,7 +197,7 @@ static BlockDriver bdrv_raw = {
     .bdrv_lock_medium     = &raw_lock_medium,
     .bdrv_ioctl           = &raw_ioctl,
     .bdrv_aio_ioctl       = &raw_aio_ioctl,
-    .create_options       = &raw_create_options[0],
+    .create_opts          = &raw_create_opts,
     .bdrv_has_zero_init   = &raw_has_zero_init
 };
 
diff --git a/block/rbd.c b/block/rbd.c
index 93639f7..2b797d3 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -289,8 +289,7 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf, Error **errp)
     return ret;
 }
 
-static int qemu_rbd_create(const char *filename, QEMUOptionParameter *options,
-                           Error **errp)
+static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     Error *local_err = NULL;
     int64_t bytes = 0;
@@ -315,24 +314,18 @@ static int qemu_rbd_create(const char *filename, QEMUOptionParameter *options,
     }
 
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            bytes = options->value.n;
-        } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) {
-            if (options->value.n) {
-                objsize = options->value.n;
-                if ((objsize - 1) & objsize) {    /* not a power of 2? */
-                    error_setg(errp, "obj size needs to be power of 2");
-                    return -EINVAL;
-                }
-                if (objsize < 4096) {
-                    error_setg(errp, "obj size too small");
-                    return -EINVAL;
-                }
-                obj_order = ffs(objsize) - 1;
-            }
+    bytes = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    objsize = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 0);
+    if (objsize) {
+        if ((objsize - 1) & objsize) {    /* not a power of 2? */
+            error_setg(errp, "obj size needs to be power of 2");
+            return -EINVAL;
+        }
+        if (objsize < 4096) {
+            error_setg(errp, "obj size too small");
+            return -EINVAL;
         }
-        options++;
+        obj_order = ffs(objsize) - 1;
     }
 
     clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
@@ -911,18 +904,22 @@ static BlockDriverAIOCB* qemu_rbd_aio_discard(BlockDriverState *bs,
 }
 #endif
 
-static QEMUOptionParameter qemu_rbd_create_options[] = {
-    {
-     .name = BLOCK_OPT_SIZE,
-     .type = OPT_SIZE,
-     .help = "Virtual disk size"
-    },
-    {
-     .name = BLOCK_OPT_CLUSTER_SIZE,
-     .type = OPT_SIZE,
-     .help = "RBD object size"
-    },
-    {NULL}
+static QemuOptsList qemu_rbd_create_opts = {
+    .name = "rbd-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_rbd_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_CLUSTER_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "RBD object size"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_rbd = {
@@ -934,7 +931,7 @@ static BlockDriver bdrv_rbd = {
     .bdrv_create        = qemu_rbd_create,
     .bdrv_has_zero_init = bdrv_has_zero_init_1,
     .bdrv_get_info      = qemu_rbd_getinfo,
-    .create_options     = qemu_rbd_create_options,
+    .create_opts        = &qemu_rbd_create_opts,
     .bdrv_getlength     = qemu_rbd_getlength,
     .bdrv_truncate      = qemu_rbd_truncate,
     .protocol_name      = "rbd",
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 1fa1939..2dcc595 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1670,12 +1670,13 @@ static int parse_redundancy(BDRVSheepdogState *s, const char *opt)
     return 0;
 }
 
-static int sd_create(const char *filename, QEMUOptionParameter *options,
+static int sd_create(const char *filename, QemuOpts *opts,
                      Error **errp)
 {
     int ret = 0;
     uint32_t vid = 0;
     char *backing_file = NULL;
+    char *buf = NULL;
     BDRVSheepdogState *s;
     char tag[SD_MAX_VDI_TAG_LEN];
     uint32_t snapid;
@@ -1694,33 +1695,27 @@ static int sd_create(const char *filename, QEMUOptionParameter *options,
         goto out;
     }
 
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            s->inode.vdi_size = options->value.n;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            backing_file = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_PREALLOC)) {
-            if (!options->value.s || !strcmp(options->value.s, "off")) {
-                prealloc = false;
-            } else if (!strcmp(options->value.s, "full")) {
-                prealloc = true;
-            } else {
-                error_setg(errp, "Invalid preallocation mode: '%s'",
-                           options->value.s);
-                ret = -EINVAL;
-                goto out;
-            }
-        } else if (!strcmp(options->name, BLOCK_OPT_REDUNDANCY)) {
-            if (options->value.s) {
-                ret = parse_redundancy(s, options->value.s);
-                if (ret < 0) {
-                    error_setg(errp, "Invalid redundancy mode: '%s'",
-                               options->value.s);
-                    goto out;
-                }
-            }
+    s->inode.vdi_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+    buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
+    if (!buf || !strcmp(buf, "off")) {
+        prealloc = false;
+    } else if (!strcmp(buf, "full")) {
+        prealloc = true;
+    } else {
+        error_setg(errp, "Invalid preallocation mode: '%s'", buf);
+        ret = -EINVAL;
+        goto out;
+    }
+
+    g_free(buf);
+    buf = qemu_opt_get_del(opts, BLOCK_OPT_REDUNDANCY);
+    if (buf) {
+        ret = parse_redundancy(s, buf);
+        if (ret < 0) {
+            error_setg(errp, "Invalid redundancy mode: '%s'", buf);
+            goto out;
         }
-        options++;
     }
 
     if (s->inode.vdi_size > SD_MAX_VDI_SIZE) {
@@ -1770,6 +1765,8 @@ static int sd_create(const char *filename, QEMUOptionParameter *options,
         ret = sd_prealloc(filename, errp);
     }
 out:
+    g_free(backing_file);
+    g_free(buf);
     g_free(s);
     return ret;
 }
@@ -2571,28 +2568,32 @@ static int64_t sd_get_allocated_file_size(BlockDriverState *bs)
     return size;
 }
 
-static QEMUOptionParameter sd_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    },
-    {
-        .name = BLOCK_OPT_PREALLOC,
-        .type = OPT_STRING,
-        .help = "Preallocation mode (allowed values: off, full)"
-    },
-    {
-        .name = BLOCK_OPT_REDUNDANCY,
-        .type = OPT_STRING,
-        .help = "Redundancy of the image"
-    },
-    { NULL }
+static QemuOptsList sd_create_opts = {
+    .name = "sheepdog-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(sd_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        {
+            .name = BLOCK_OPT_PREALLOC,
+            .type = QEMU_OPT_STRING,
+            .help = "Preallocation mode (allowed values: off, full)"
+        },
+        {
+            .name = BLOCK_OPT_REDUNDANCY,
+            .type = QEMU_OPT_STRING,
+            .help = "Redundancy of the image"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_sheepdog = {
@@ -2625,7 +2626,7 @@ static BlockDriver bdrv_sheepdog = {
     .bdrv_detach_aio_context = sd_detach_aio_context,
     .bdrv_attach_aio_context = sd_attach_aio_context,
 
-    .create_options = sd_create_options,
+    .create_opts    = &sd_create_opts,
 };
 
 static BlockDriver bdrv_sheepdog_tcp = {
@@ -2658,7 +2659,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
     .bdrv_detach_aio_context = sd_detach_aio_context,
     .bdrv_attach_aio_context = sd_attach_aio_context,
 
-    .create_options = sd_create_options,
+    .create_opts    = &sd_create_opts,
 };
 
 static BlockDriver bdrv_sheepdog_unix = {
@@ -2691,7 +2692,7 @@ static BlockDriver bdrv_sheepdog_unix = {
     .bdrv_detach_aio_context = sd_detach_aio_context,
     .bdrv_attach_aio_context = sd_attach_aio_context,
 
-    .create_options = sd_create_options,
+    .create_opts    = &sd_create_opts,
 };
 
 static void bdrv_sheepdog_init(void)
diff --git a/block/ssh.c b/block/ssh.c
index 9779eac..cd2fd75 100644
--- a/block/ssh.c
+++ b/block/ssh.c
@@ -675,17 +675,20 @@ static int ssh_file_open(BlockDriverState *bs, QDict *options, int bdrv_flags,
     return ret;
 }
 
-static QEMUOptionParameter ssh_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    { NULL }
+static QemuOptsList ssh_create_opts = {
+    .name = "ssh-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(ssh_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        { /* end of list */ }
+    }
 };
 
-static int ssh_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int ssh_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int r, ret;
     int64_t total_size = 0;
@@ -697,12 +700,7 @@ static int ssh_create(const char *filename, QEMUOptionParameter *options,
     ssh_state_init(&s);
 
     /* Get desired file size. */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n;
-        }
-        options++;
-    }
+    total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
     DPRINTF("total_size=%" PRIi64, total_size);
 
     uri_options = qdict_new();
@@ -1084,7 +1082,7 @@ static BlockDriver bdrv_ssh = {
     .bdrv_co_writev               = ssh_co_writev,
     .bdrv_getlength               = ssh_getlength,
     .bdrv_co_flush_to_disk        = ssh_co_flush,
-    .create_options               = ssh_create_options,
+    .create_opts                  = &ssh_create_opts,
 };
 
 static void bdrv_ssh_init(void)
diff --git a/block/vdi.c b/block/vdi.c
index 1b2be1a..01fe22e 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -672,8 +672,7 @@ static int vdi_co_write(BlockDriverState *bs,
     return ret;
 }
 
-static int vdi_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int fd;
     int result = 0;
@@ -688,25 +687,18 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options,
     logout("\n");
 
     /* Read out options. */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            bytes = options->value.n;
+    bytes = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
 #if defined(CONFIG_VDI_BLOCK_SIZE)
-        } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) {
-            if (options->value.n) {
-                /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */
-                block_size = options->value.n;
-            }
+    /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */
+    block_size = qemu_opt_get_size_del(opts,
+                                       BLOCK_OPT_CLUSTER_SIZE,
+                                       DEFAULT_CLUSTER_SIZE);
 #endif
 #if defined(CONFIG_VDI_STATIC_IMAGE)
-        } else if (!strcmp(options->name, BLOCK_OPT_STATIC)) {
-            if (options->value.n) {
-                image_type = VDI_TYPE_STATIC;
-            }
-#endif
-        }
-        options++;
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_STATIC, false)) {
+        image_type = VDI_TYPE_STATIC;
     }
+#endif
 
     if (bytes > VDI_DISK_SIZE_MAX) {
         result = -ENOTSUP;
@@ -801,29 +793,34 @@ static void vdi_close(BlockDriverState *bs)
     error_free(s->migration_blocker);
 }
 
-static QEMUOptionParameter vdi_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
+static QemuOptsList vdi_create_opts = {
+    .name = "vdi-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(vdi_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
 #if defined(CONFIG_VDI_BLOCK_SIZE)
-    {
-        .name = BLOCK_OPT_CLUSTER_SIZE,
-        .type = OPT_SIZE,
-        .help = "VDI cluster (block) size",
-        .value = { .n = DEFAULT_CLUSTER_SIZE },
-    },
+        {
+            .name = BLOCK_OPT_CLUSTER_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "VDI cluster (block) size",
+            .def_value_str = stringify(DEFAULT_CLUSTER_SIZE)
+        },
 #endif
 #if defined(CONFIG_VDI_STATIC_IMAGE)
-    {
-        .name = BLOCK_OPT_STATIC,
-        .type = OPT_FLAG,
-        .help = "VDI static (pre-allocated) image"
-    },
+        {
+            .name = BLOCK_OPT_STATIC,
+            .type = QEMU_OPT_BOOL,
+            .help = "VDI static (pre-allocated) image",
+            .def_value_str = "off"
+        },
 #endif
-    /* TODO: An additional option to set UUID values might be useful. */
-    { NULL }
+        /* TODO: An additional option to set UUID values might be useful. */
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_vdi = {
@@ -845,7 +842,7 @@ static BlockDriver bdrv_vdi = {
 
     .bdrv_get_info = vdi_get_info,
 
-    .create_options = vdi_create_options,
+    .create_opts = &vdi_create_opts,
     .bdrv_check = vdi_check,
 };
 
diff --git a/block/vhdx.c b/block/vhdx.c
index 353c74d..fedcf9f 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1723,8 +1723,7 @@ exit:
  *    .---- ~ ----------- ~ ------------ ~ ---------------- ~ -----------.
  *   1MB
  */
-static int vhdx_create(const char *filename, QEMUOptionParameter *options,
-                       Error **errp)
+static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int ret = 0;
     uint64_t image_size = (uint64_t) 2 * GiB;
@@ -1737,24 +1736,15 @@ static int vhdx_create(const char *filename, QEMUOptionParameter *options,
     gunichar2 *creator = NULL;
     glong creator_items;
     BlockDriverState *bs;
-    const char *type = NULL;
+    char *type = NULL;
     VHDXImageType image_type;
     Error *local_err = NULL;
 
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            image_size = options->value.n;
-        } else if (!strcmp(options->name, VHDX_BLOCK_OPT_LOG_SIZE)) {
-            log_size = options->value.n;
-        } else if (!strcmp(options->name, VHDX_BLOCK_OPT_BLOCK_SIZE)) {
-            block_size = options->value.n;
-        } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) {
-            type = options->value.s;
-        } else if (!strcmp(options->name, VHDX_BLOCK_OPT_ZERO)) {
-            use_zero_blocks = options->value.n != 0;
-        }
-        options++;
-    }
+    image_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    log_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_LOG_SIZE, 0);
+    block_size = qemu_opt_get_size_del(opts, VHDX_BLOCK_OPT_BLOCK_SIZE, 0);
+    type = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
+    use_zero_blocks = qemu_opt_get_bool_del(opts, VHDX_BLOCK_OPT_ZERO, false);
 
     if (image_size > VHDX_MAX_IMAGE_SIZE) {
         error_setg_errno(errp, EINVAL, "Image size too large; max of 64TB");
@@ -1763,7 +1753,7 @@ static int vhdx_create(const char *filename, QEMUOptionParameter *options,
     }
 
     if (type == NULL) {
-        type = "dynamic";
+        type = g_strdup("dynamic");
     }
 
     if (!strcmp(type, "dynamic")) {
@@ -1803,7 +1793,7 @@ static int vhdx_create(const char *filename, QEMUOptionParameter *options,
     block_size = block_size > VHDX_BLOCK_SIZE_MAX ? VHDX_BLOCK_SIZE_MAX :
                                                     block_size;
 
-    ret = bdrv_create_file(filename, options, &local_err);
+    ret = bdrv_create_file(filename, opts, &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
@@ -1863,6 +1853,7 @@ static int vhdx_create(const char *filename, QEMUOptionParameter *options,
 delete_and_exit:
     bdrv_unref(bs);
 exit:
+    g_free(type);
     g_free(creator);
     return ret;
 }
@@ -1885,37 +1876,41 @@ static int vhdx_check(BlockDriverState *bs, BdrvCheckResult *result,
     return 0;
 }
 
-static QEMUOptionParameter vhdx_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size; max of 64TB."
-    },
-    {
-        .name = VHDX_BLOCK_OPT_LOG_SIZE,
-        .type = OPT_SIZE,
-        .value.n = 1 * MiB,
-        .help = "Log size; min 1MB."
-    },
-    {
-        .name = VHDX_BLOCK_OPT_BLOCK_SIZE,
-        .type = OPT_SIZE,
-        .value.n = 0,
-        .help = "Block Size; min 1MB, max 256MB. " \
-                "0 means auto-calculate based on image size."
-    },
-    {
-        .name = BLOCK_OPT_SUBFMT,
-        .type = OPT_STRING,
-        .help = "VHDX format type, can be either 'dynamic' or 'fixed'. "\
-                "Default is 'dynamic'."
-    },
-    {
-        .name = VHDX_BLOCK_OPT_ZERO,
-        .type = OPT_FLAG,
-        .help = "Force use of payload blocks of type 'ZERO'.  Non-standard."
-    },
-    { NULL }
+static QemuOptsList vhdx_create_opts = {
+    .name = "vhdx-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(vhdx_create_opts.head),
+    .desc = {
+        {
+           .name = BLOCK_OPT_SIZE,
+           .type = QEMU_OPT_SIZE,
+           .help = "Virtual disk size; max of 64TB."
+       },
+       {
+           .name = VHDX_BLOCK_OPT_LOG_SIZE,
+           .type = QEMU_OPT_SIZE,
+           .def_value_str = stringify(DEFAULT_LOG_SIZE),
+           .help = "Log size; min 1MB."
+       },
+       {
+           .name = VHDX_BLOCK_OPT_BLOCK_SIZE,
+           .type = QEMU_OPT_SIZE,
+           .def_value_str = stringify(0),
+           .help = "Block Size; min 1MB, max 256MB. " \
+                   "0 means auto-calculate based on image size."
+       },
+       {
+           .name = BLOCK_OPT_SUBFMT,
+           .type = QEMU_OPT_STRING,
+           .help = "VHDX format type, can be either 'dynamic' or 'fixed'. "\
+                   "Default is 'dynamic'."
+       },
+       {
+           .name = VHDX_BLOCK_OPT_ZERO,
+           .type = QEMU_OPT_BOOL,
+           .help = "Force use of payload blocks of type 'ZERO'.  Non-standard."
+       },
+       { NULL }
+    }
 };
 
 static BlockDriver bdrv_vhdx = {
@@ -1931,7 +1926,7 @@ static BlockDriver bdrv_vhdx = {
     .bdrv_get_info          = vhdx_get_info,
     .bdrv_check             = vhdx_check,
 
-    .create_options         = vhdx_create_options,
+    .create_opts            = &vhdx_create_opts,
 };
 
 static void bdrv_vhdx_init(void)
diff --git a/block/vhdx.h b/block/vhdx.h
index 8103d4c..5370010 100644
--- a/block/vhdx.h
+++ b/block/vhdx.h
@@ -23,6 +23,7 @@
 #define GiB            (MiB * 1024)
 #define TiB ((uint64_t) GiB * 1024)
 
+#define DEFAULT_LOG_SIZE 1048576 /* 1MiB */
 /* Structures and fields present in the VHDX file */
 
 /* The header section has the following blocks,
diff --git a/block/vmdk.c b/block/vmdk.c
index b8a4762..83dd6fe 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1695,17 +1695,16 @@ static int filename_decompose(const char *filename, char *path, char *prefix,
     return VMDK_OK;
 }
 
-static int vmdk_create(const char *filename, QEMUOptionParameter *options,
-                       Error **errp)
+static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     int idx = 0;
     BlockDriverState *new_bs = NULL;
     Error *local_err = NULL;
     char *desc = NULL;
     int64_t total_size = 0, filesize;
-    const char *adapter_type = NULL;
-    const char *backing_file = NULL;
-    const char *fmt = NULL;
+    char *adapter_type = NULL;
+    char *backing_file = NULL;
+    char *fmt = NULL;
     int flags = 0;
     int ret = 0;
     bool flat, split, compress;
@@ -1745,24 +1744,19 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
         goto exit;
     }
     /* Read out options */
-    while (options && options->name) {
-        if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
-            total_size = options->value.n;
-        } else if (!strcmp(options->name, BLOCK_OPT_ADAPTER_TYPE)) {
-            adapter_type = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) {
-            backing_file = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) {
-            flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0;
-        } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) {
-            fmt = options->value.s;
-        } else if (!strcmp(options->name, BLOCK_OPT_ZEROED_GRAIN)) {
-            zeroed_grain |= options->value.n;
-        }
-        options++;
+    total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
+    backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
+        flags |= BLOCK_FLAG_COMPAT6;
+    }
+    fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
+    if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
+        zeroed_grain = true;
     }
+
     if (!adapter_type) {
-        adapter_type = "ide";
+        adapter_type = g_strdup("ide");
     } else if (strcmp(adapter_type, "ide") &&
                strcmp(adapter_type, "buslogic") &&
                strcmp(adapter_type, "lsilogic") &&
@@ -1778,7 +1772,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
     }
     if (!fmt) {
         /* Default format to monolithicSparse */
-        fmt = "monolithicSparse";
+        fmt = g_strdup("monolithicSparse");
     } else if (strcmp(fmt, "monolithicFlat") &&
                strcmp(fmt, "monolithicSparse") &&
                strcmp(fmt, "twoGbMaxExtentSparse") &&
@@ -1879,7 +1873,7 @@ static int vmdk_create(const char *filename, QEMUOptionParameter *options,
     if (!split && !flat) {
         desc_offset = 0x200;
     } else {
-        ret = bdrv_create_file(filename, options, &local_err);
+        ret = bdrv_create_file(filename, opts, &local_err);
         if (ret < 0) {
             error_propagate(errp, local_err);
             goto exit;
@@ -1909,6 +1903,9 @@ exit:
     if (new_bs) {
         bdrv_unref(new_bs);
     }
+    g_free(adapter_type);
+    g_free(backing_file);
+    g_free(fmt);
     g_free(desc);
     g_string_free(ext_desc_lines, true);
     return ret;
@@ -2117,41 +2114,47 @@ static void vmdk_attach_aio_context(BlockDriverState *bs,
     }
 }
 
-static QEMUOptionParameter vmdk_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_ADAPTER_TYPE,
-        .type = OPT_STRING,
-        .help = "Virtual adapter type, can be one of "
-                "ide (default), lsilogic, buslogic or legacyESX"
-    },
-    {
-        .name = BLOCK_OPT_BACKING_FILE,
-        .type = OPT_STRING,
-        .help = "File name of a base image"
-    },
-    {
-        .name = BLOCK_OPT_COMPAT6,
-        .type = OPT_FLAG,
-        .help = "VMDK version 6 image"
-    },
-    {
-        .name = BLOCK_OPT_SUBFMT,
-        .type = OPT_STRING,
-        .help =
-            "VMDK flat extent format, can be one of "
-            "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
-    },
-    {
-        .name = BLOCK_OPT_ZEROED_GRAIN,
-        .type = OPT_FLAG,
-        .help = "Enable efficient zero writes using the zeroed-grain GTE feature"
-    },
-    { NULL }
+static QemuOptsList vmdk_create_opts = {
+    .name = "vmdk-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_ADAPTER_TYPE,
+            .type = QEMU_OPT_STRING,
+            .help = "Virtual adapter type, can be one of "
+                    "ide (default), lsilogic, buslogic or legacyESX"
+        },
+        {
+            .name = BLOCK_OPT_BACKING_FILE,
+            .type = QEMU_OPT_STRING,
+            .help = "File name of a base image"
+        },
+        {
+            .name = BLOCK_OPT_COMPAT6,
+            .type = QEMU_OPT_BOOL,
+            .help = "VMDK version 6 image",
+            .def_value_str = "off"
+        },
+        {
+            .name = BLOCK_OPT_SUBFMT,
+            .type = QEMU_OPT_STRING,
+            .help =
+                "VMDK flat extent format, can be one of "
+                "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
+        },
+        {
+            .name = BLOCK_OPT_ZEROED_GRAIN,
+            .type = QEMU_OPT_BOOL,
+            .help = "Enable efficient zero writes "
+                    "using the zeroed-grain GTE feature"
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_vmdk = {
@@ -2177,7 +2180,7 @@ static BlockDriver bdrv_vmdk = {
     .bdrv_detach_aio_context      = vmdk_detach_aio_context,
     .bdrv_attach_aio_context      = vmdk_attach_aio_context,
 
-    .create_options               = vmdk_create_options,
+    .create_opts                  = &vmdk_create_opts,
 };
 
 static void bdrv_vmdk_init(void)
diff --git a/block/vpc.c b/block/vpc.c
index 2e25f57..798d854 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -738,12 +738,11 @@ static int create_fixed_disk(int fd, uint8_t *buf, int64_t total_size)
     return ret;
 }
 
-static int vpc_create(const char *filename, QEMUOptionParameter *options,
-                      Error **errp)
+static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
 {
     uint8_t buf[1024];
     VHDFooter *footer = (VHDFooter *) buf;
-    QEMUOptionParameter *disk_type_param;
+    char *disk_type_param;
     int fd, i;
     uint16_t cyls = 0;
     uint8_t heads = 0;
@@ -754,16 +753,16 @@ static int vpc_create(const char *filename, QEMUOptionParameter *options,
     int ret = -EIO;
 
     /* Read out options */
-    total_size = get_option_parameter(options, BLOCK_OPT_SIZE)->value.n;
-
-    disk_type_param = get_option_parameter(options, BLOCK_OPT_SUBFMT);
-    if (disk_type_param && disk_type_param->value.s) {
-        if (!strcmp(disk_type_param->value.s, "dynamic")) {
+    total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+    disk_type_param = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
+    if (disk_type_param) {
+        if (!strcmp(disk_type_param, "dynamic")) {
             disk_type = VHD_DYNAMIC;
-        } else if (!strcmp(disk_type_param->value.s, "fixed")) {
+        } else if (!strcmp(disk_type_param, "fixed")) {
             disk_type = VHD_FIXED;
         } else {
-            return -EINVAL;
+            ret = -EINVAL;
+            goto out;
         }
     } else {
         disk_type = VHD_DYNAMIC;
@@ -772,7 +771,8 @@ static int vpc_create(const char *filename, QEMUOptionParameter *options,
     /* Create the file */
     fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
     if (fd < 0) {
-        return -EIO;
+        ret = -EIO;
+        goto out;
     }
 
     /*
@@ -837,8 +837,10 @@ static int vpc_create(const char *filename, QEMUOptionParameter *options,
         ret = create_fixed_disk(fd, buf, total_size);
     }
 
- fail:
+fail:
     qemu_close(fd);
+out:
+    g_free(disk_type_param);
     return ret;
 }
 
@@ -866,20 +868,24 @@ static void vpc_close(BlockDriverState *bs)
     error_free(s->migration_blocker);
 }
 
-static QEMUOptionParameter vpc_create_options[] = {
-    {
-        .name = BLOCK_OPT_SIZE,
-        .type = OPT_SIZE,
-        .help = "Virtual disk size"
-    },
-    {
-        .name = BLOCK_OPT_SUBFMT,
-        .type = OPT_STRING,
-        .help =
-            "Type of virtual hard disk format. Supported formats are "
-            "{dynamic (default) | fixed} "
-    },
-    { NULL }
+static QemuOptsList vpc_create_opts = {
+    .name = "vpc-create-opts",
+    .head = QTAILQ_HEAD_INITIALIZER(vpc_create_opts.head),
+    .desc = {
+        {
+            .name = BLOCK_OPT_SIZE,
+            .type = QEMU_OPT_SIZE,
+            .help = "Virtual disk size"
+        },
+        {
+            .name = BLOCK_OPT_SUBFMT,
+            .type = QEMU_OPT_STRING,
+            .help =
+                "Type of virtual hard disk format. Supported formats are "
+                "{dynamic (default) | fixed} "
+        },
+        { /* end of list */ }
+    }
 };
 
 static BlockDriver bdrv_vpc = {
@@ -897,7 +903,7 @@ static BlockDriver bdrv_vpc = {
 
     .bdrv_get_info          = vpc_get_info,
 
-    .create_options         = vpc_create_options,
+    .create_opts            = &vpc_create_opts,
     .bdrv_has_zero_init     = vpc_has_zero_init,
 };
 
diff --git a/block/vvfat.c b/block/vvfat.c
index 3cda19f..70176b1 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2910,8 +2910,8 @@ static BlockDriver vvfat_write_target = {
 
 static int enable_write_target(BDRVVVFATState *s, Error **errp)
 {
-    BlockDriver *bdrv_qcow;
-    QEMUOptionParameter *options;
+    BlockDriver *bdrv_qcow = NULL;
+    QemuOpts *opts = NULL;
     int ret;
     int size = sector2cluster(s, s->sector_count);
     s->used_clusters = calloc(size, 1);
@@ -2926,12 +2926,12 @@ static int enable_write_target(BDRVVVFATState *s, Error **errp)
     }
 
     bdrv_qcow = bdrv_find_format("qcow");
-    options = parse_option_parameters("", bdrv_qcow->create_options, NULL);
-    set_option_parameter_int(options, BLOCK_OPT_SIZE, s->sector_count * 512);
-    set_option_parameter(options, BLOCK_OPT_BACKING_FILE, "fat:");
+    opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort);
+    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512);
+    qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");
 
-    ret = bdrv_create(bdrv_qcow, s->qcow_filename, options, errp);
-    free_option_parameters(options);
+    ret = bdrv_create(bdrv_qcow, s->qcow_filename, opts, errp);
+    qemu_opts_del(opts);
     if (ret < 0) {
         goto err;
     }
diff --git a/blockdev.c b/blockdev.c
index 4cbcc56..9b0f8ac 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -106,7 +106,7 @@ void blockdev_auto_del(BlockDriverState *bs)
     DriveInfo *dinfo = drive_get_by_blockdev(bs);
 
     if (dinfo && dinfo->auto_del) {
-        drive_put_ref(dinfo);
+        drive_del(dinfo);
     }
 }
 
@@ -213,7 +213,7 @@ static void bdrv_format_print(void *opaque, const char *name)
     error_printf(" %s", name);
 }
 
-static void drive_uninit(DriveInfo *dinfo)
+void drive_del(DriveInfo *dinfo)
 {
     if (dinfo->opts) {
         qemu_opts_del(dinfo->opts);
@@ -226,19 +226,6 @@ static void drive_uninit(DriveInfo *dinfo)
     g_free(dinfo);
 }
 
-void drive_put_ref(DriveInfo *dinfo)
-{
-    assert(dinfo->refcount);
-    if (--dinfo->refcount == 0) {
-        drive_uninit(dinfo);
-    }
-}
-
-void drive_get_ref(DriveInfo *dinfo)
-{
-    dinfo->refcount++;
-}
-
 typedef struct {
     QEMUBH *bh;
     BlockDriverState *bs;
@@ -329,7 +316,6 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
                                 Error **errp)
 {
     const char *buf;
-    const char *serial;
     int ro = 0;
     int bdrv_flags = 0;
     int on_read_error, on_write_error;
@@ -371,8 +357,6 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
     ro = qemu_opt_get_bool(opts, "read-only", 0);
     copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
 
-    serial = qemu_opt_get(opts, "serial");
-
     if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
         if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
             error_setg(errp, "invalid discard option");
@@ -500,10 +484,6 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
     dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
     dinfo->bdrv->read_only = ro;
     dinfo->bdrv->detect_zeroes = detect_zeroes;
-    dinfo->refcount = 1;
-    if (serial != NULL) {
-        dinfo->serial = g_strdup(serial);
-    }
     QTAILQ_INSERT_TAIL(&drives, dinfo, next);
 
     bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
@@ -630,6 +610,10 @@ QemuOptsList qemu_legacy_drive_opts = {
             .type = QEMU_OPT_STRING,
             .help = "pci address (virtio only)",
         },{
+            .name = "serial",
+            .type = QEMU_OPT_STRING,
+            .help = "disk serial number",
+        },{
             .name = "file",
             .type = QEMU_OPT_STRING,
             .help = "file name",
@@ -658,7 +642,7 @@ QemuOptsList qemu_legacy_drive_opts = {
     },
 };
 
-DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
+DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
 {
     const char *value;
     DriveInfo *dinfo = NULL;
@@ -672,6 +656,7 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
     const char *werror, *rerror;
     bool read_only = false;
     bool copy_on_read;
+    const char *serial;
     const char *filename;
     Error *local_err = NULL;
 
@@ -875,6 +860,9 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
         goto fail;
     }
 
+    /* Serial number */
+    serial = qemu_opt_get(legacy_opts, "serial");
+
     /* no id supplied -> create one */
     if (qemu_opts_id(all_opts) == NULL) {
         char *new_id;
@@ -965,6 +953,8 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
     dinfo->unit = unit_id;
     dinfo->devaddr = devaddr;
 
+    dinfo->serial = g_strdup(serial);
+
     switch(type) {
     case IF_IDE:
     case IF_SCSI:
@@ -1797,7 +1787,7 @@ int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
         bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
                           BLOCKDEV_ON_ERROR_REPORT);
     } else {
-        drive_uninit(drive_get_by_blockdev(bs));
+        drive_del(drive_get_by_blockdev(bs));
     }
 
     return 0;
@@ -2340,9 +2330,9 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
         goto fail;
     }
 
-    /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
+    /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
      * cache.direct=false instead of silently switching to aio=threads, except
-     * if called from drive_init.
+     * when called from drive_new().
      *
      * For now, simply forbidding the combination for all drivers will do. */
     if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
@@ -2374,7 +2364,7 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
     }
 
     if (bdrv_key_required(dinfo->bdrv)) {
-        drive_uninit(dinfo);
+        drive_del(dinfo);
         error_setg(errp, "blockdev-add doesn't support encrypted devices");
         goto fail;
     }
@@ -2438,10 +2428,6 @@ QemuOptsList qemu_common_drive_opts = {
             .type = QEMU_OPT_STRING,
             .help = "disk format (raw, qcow2, ...)",
         },{
-            .name = "serial",
-            .type = QEMU_OPT_STRING,
-            .help = "disk serial number",
-        },{
             .name = "rerror",
             .type = QEMU_OPT_STRING,
             .help = "read error action",
diff --git a/configure b/configure
index dfbe75e..57d3ad8 100755
--- a/configure
+++ b/configure
@@ -311,8 +311,8 @@ libusb=""
 usb_redir=""
 glx=""
 zlib="yes"
-lzo="no"
-snappy="no"
+lzo=""
+snappy=""
 guest_agent=""
 guest_agent_with_vss="no"
 vss_win32_sdk=""
@@ -333,7 +333,7 @@ vte=""
 tpm="no"
 libssh2=""
 vhdx=""
-quorum="no"
+quorum=""
 
 # parse CC options first
 for opt do
@@ -1050,8 +1050,12 @@ for opt do
   ;;
   --disable-zlib-test) zlib="no"
   ;;
+  --disable-lzo) lzo="no"
+  ;;
   --enable-lzo) lzo="yes"
   ;;
+  --disable-snappy) snappy="no"
+  ;;
   --enable-snappy) snappy="yes"
   ;;
   --enable-guest-agent) guest_agent="yes"
@@ -1749,13 +1753,14 @@ if test "$lzo" != "no" ; then
 int main(void) { lzo_version(); return 0; }
 EOF
     if compile_prog "" "-llzo2" ; then
-        :
+        libs_softmmu="$libs_softmmu -llzo2"
+        lzo="yes"
     else
-        error_exit "lzo check failed" \
-            "Make sure to have the lzo libs and headers installed."
+        if test "$lzo" = "yes"; then
+            feature_not_found "liblzo2" "Install liblzo2 devel"
+        fi
+        lzo="no"
     fi
-
-    libs_softmmu="$libs_softmmu -llzo2"
 fi
 
 ##########################################
@@ -1767,13 +1772,14 @@ if test "$snappy" != "no" ; then
 int main(void) { snappy_max_compressed_length(4096); return 0; }
 EOF
     if compile_prog "" "-lsnappy" ; then
-        :
+        libs_softmmu="$libs_softmmu -lsnappy"
+        snappy="yes"
     else
-        error_exit "snappy check failed" \
-            "Make sure to have the snappy libs and headers installed."
+        if test "$snappy" = "yes"; then
+            feature_not_found "libsnappy" "Install libsnappy devel"
+        fi
+        snappy="no"
     fi
-
-    libs_softmmu="$libs_softmmu -lsnappy"
 fi
 
 ##########################################
@@ -2219,9 +2225,12 @@ if compile_prog "$quorum_tls_cflags" "$quorum_tls_libs" ; then
   libs_softmmu="$quorum_tls_libs $libs_softmmu"
   libs_tools="$quorum_tls_libs $libs_softmmu"
   QEMU_CFLAGS="$QEMU_CFLAGS $quorum_tls_cflags"
+  quorum="yes"
 else
-  echo "gnutls > 2.10.0 required to compile Quorum"
-  exit 1
+  if test "$quorum" = "yes"; then
+    feature_not_found "gnutls" "gnutls > 2.10.0 required to compile Quorum"
+  fi
+  quorum="no"
 fi
 fi
 
diff --git a/device-hotplug.c b/device-hotplug.c
index eecb08e..e6a1ffb 100644
--- a/device-hotplug.c
+++ b/device-hotplug.c
@@ -40,7 +40,7 @@ DriveInfo *add_init_drive(const char *optstr)
         return NULL;
 
     mc = MACHINE_GET_CLASS(current_machine);
-    dinfo = drive_init(opts, mc->block_default_type);
+    dinfo = drive_new(opts, mc->block_default_type);
     if (!dinfo) {
         qemu_opts_del(opts);
         return NULL;
@@ -76,6 +76,6 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
 
 err:
     if (dinfo) {
-        drive_put_ref(dinfo);
+        drive_del(dinfo);
     }
 }
diff --git a/hw/block/onenand.c b/hw/block/onenand.c
index 60d5311..5388122 100644
--- a/hw/block/onenand.c
+++ b/hw/block/onenand.c
@@ -335,9 +335,7 @@ static inline int onenand_prog_spare(OneNANDState *s, int sec, int secn,
                                     dp, 1) < 0;
             }
         }
-        if (dp) {
-            g_free(dp);
-        }
+        g_free(dp);
     }
     return result;
 }
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 40757eb..8651726 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -184,7 +184,7 @@ int pci_piix3_xen_ide_unplug(DeviceState *dev)
             }
             bdrv_close(di->bdrv);
             pci_ide->bus[di->bus].ifs[di->unit].bs = NULL;
-            drive_put_ref(di);
+            drive_del(di);
         }
     }
     qdev_reset_all(DEVICE(dev));
diff --git a/hw/usb/dev-storage.c b/hw/usb/dev-storage.c
index e919100..ae4efcb 100644
--- a/hw/usb/dev-storage.c
+++ b/hw/usb/dev-storage.c
@@ -691,7 +691,7 @@ static USBDevice *usb_msd_init(USBBus *bus, const char *filename)
     qemu_opt_set(opts, "if", "none");
 
     /* create host drive */
-    dinfo = drive_init(opts, 0);
+    dinfo = drive_new(opts, 0);
     if (!dinfo) {
         qemu_opts_del(opts);
         return NULL;
diff --git a/include/block/block.h b/include/block/block.h
index 7d86e29..f15b99b 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -204,9 +204,8 @@ BlockDriver *bdrv_find_format(const char *format_name);
 BlockDriver *bdrv_find_whitelisted_format(const char *format_name,
                                           bool readonly);
 int bdrv_create(BlockDriver *drv, const char* filename,
-    QEMUOptionParameter *options, Error **errp);
-int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
-                     Error **errp);
+                QemuOpts *opts, Error **errp);
+int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
 BlockDriverState *bdrv_new(const char *device_name, Error **errp);
 void bdrv_make_anon(BlockDriverState *bs);
 void bdrv_swap(BlockDriverState *bs_new, BlockDriverState *bs_old);
@@ -312,7 +311,7 @@ typedef enum {
 
 int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix);
 
-int bdrv_amend_options(BlockDriverState *bs_new, QEMUOptionParameter *options);
+int bdrv_amend_options(BlockDriverState *bs_new, QemuOpts *opts);
 
 /* external snapshots */
 bool bdrv_recurse_is_first_non_filter(BlockDriverState *bs,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8d58334..7aa2213 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -116,8 +116,7 @@ struct BlockDriver {
                       const uint8_t *buf, int nb_sectors);
     void (*bdrv_close)(BlockDriverState *bs);
     void (*bdrv_rebind)(BlockDriverState *bs);
-    int (*bdrv_create)(const char *filename, QEMUOptionParameter *options,
-                       Error **errp);
+    int (*bdrv_create)(const char *filename, QemuOpts *opts, Error **errp);
     int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
     int (*bdrv_make_empty)(BlockDriverState *bs);
     /* aio */
@@ -216,8 +215,7 @@ struct BlockDriver {
         BlockDriverCompletionFunc *cb, void *opaque);
 
     /* List of options for creating images, terminated by name == NULL */
-    QEMUOptionParameter *create_options;
-
+    QemuOptsList *create_opts;
 
     /*
      * Returns 0 for completed check, -errno for internal errors.
@@ -226,8 +224,7 @@ struct BlockDriver {
     int (*bdrv_check)(BlockDriverState* bs, BdrvCheckResult *result,
         BdrvCheckMode fix);
 
-    int (*bdrv_amend_options)(BlockDriverState *bs,
-        QEMUOptionParameter *options);
+    int (*bdrv_amend_options)(BlockDriverState *bs, QemuOpts *opts);
 
     void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event);
 
diff --git a/include/qemu/option.h b/include/qemu/option.h
index 8c0ac34..59bea75 100644
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -31,25 +31,6 @@
 #include "qapi/error.h"
 #include "qapi/qmp/qdict.h"
 
-enum QEMUOptionParType {
-    OPT_FLAG,
-    OPT_NUMBER,
-    OPT_SIZE,
-    OPT_STRING,
-};
-
-typedef struct QEMUOptionParameter {
-    const char *name;
-    enum QEMUOptionParType type;
-    union {
-        uint64_t n;
-        char* s;
-    } value;
-    const char *help;
-    bool assigned;
-} QEMUOptionParameter;
-
-
 const char *get_opt_name(char *buf, int buf_size, const char *p, char delim);
 const char *get_opt_value(char *buf, int buf_size, const char *p);
 int get_next_param_value(char *buf, int buf_size,
@@ -58,32 +39,11 @@ int get_param_value(char *buf, int buf_size,
                     const char *tag, const char *str);
 
 
-/*
- * The following functions take a parameter list as input. This is a pointer to
- * the first element of a QEMUOptionParameter array which is terminated by an
- * entry with entry->name == NULL.
- */
-
-QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
-    const char *name);
-int set_option_parameter(QEMUOptionParameter *list, const char *name,
-    const char *value);
-int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
-    uint64_t value);
-QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest,
-    QEMUOptionParameter *list);
-QEMUOptionParameter *parse_option_parameters(const char *param,
-    QEMUOptionParameter *list, QEMUOptionParameter *dest);
 void parse_option_size(const char *name, const char *value,
                        uint64_t *ret, Error **errp);
-void free_option_parameters(QEMUOptionParameter *list);
-void print_option_parameters(QEMUOptionParameter *list);
-void print_option_help(QEMUOptionParameter *list);
 bool has_help_option(const char *param);
 bool is_valid_option_list(const char *param);
 
-/* ------------------------------------------------------------------ */
-
 typedef struct QemuOpt QemuOpt;
 typedef struct QemuOpts QemuOpts;
 typedef struct QemuOptsList QemuOptsList;
@@ -99,6 +59,7 @@ typedef struct QemuOptDesc {
     const char *name;
     enum QemuOptType type;
     const char *help;
+    const char *def_value_str;
 } QemuOptDesc;
 
 struct QemuOptsList {
@@ -110,6 +71,7 @@ struct QemuOptsList {
 };
 
 const char *qemu_opt_get(QemuOpts *opts, const char *name);
+char *qemu_opt_get_del(QemuOpts *opts, const char *name);
 /**
  * qemu_opt_has_help_opt:
  * @opts: options to search for a help request
@@ -122,9 +84,15 @@ const char *qemu_opt_get(QemuOpts *opts, const char *name);
  * Returns: true if @opts includes 'help' or equivalent.
  */
 bool qemu_opt_has_help_opt(QemuOpts *opts);
+QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name);
 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval);
 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
+bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval);
+uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
+                                 uint64_t defval);
+uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
+                               uint64_t defval);
 int qemu_opt_unset(QemuOpts *opts, const char *name);
 int qemu_opt_set(QemuOpts *opts, const char *name, const char *value);
 void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value,
@@ -156,8 +124,11 @@ QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
 void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp);
 
 typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
-int qemu_opts_print(QemuOpts *opts, void *dummy);
+void qemu_opts_print(QemuOpts *opts);
 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
                       int abort_on_failure);
+void qemu_opts_print_help(QemuOptsList *list);
+void qemu_opts_free(QemuOptsList *list);
+QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list);
 
 #endif
diff --git a/include/qemu/option_int.h b/include/qemu/option_int.h
index 8212fa4..6432c1a 100644
--- a/include/qemu/option_int.h
+++ b/include/qemu/option_int.h
@@ -30,8 +30,8 @@
 #include "qemu/error-report.h"
 
 struct QemuOpt {
-    const char   *name;
-    const char   *str;
+    char *name;
+    char *str;
 
     const QemuOptDesc *desc;
     union {
diff --git a/include/sysemu/blockdev.h b/include/sysemu/blockdev.h
index 134712b..23a5d10 100644
--- a/include/sysemu/blockdev.h
+++ b/include/sysemu/blockdev.h
@@ -37,27 +37,25 @@ struct DriveInfo {
     int bus;
     int unit;
     int auto_del;               /* see blockdev_mark_auto_del() */
-    bool enable_auto_del; /* Only for legacy drive_init() */
+    bool enable_auto_del;       /* Only for legacy drive_new() */
     int media_cd;
     int cyls, heads, secs, trans;
     QemuOpts *opts;
     char *serial;
     QTAILQ_ENTRY(DriveInfo) next;
-    int refcount;
 };
 
 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit);
 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index);
 int drive_get_max_bus(BlockInterfaceType type);
 DriveInfo *drive_get_next(BlockInterfaceType type);
-void drive_get_ref(DriveInfo *dinfo);
-void drive_put_ref(DriveInfo *dinfo);
 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs);
 
 QemuOpts *drive_def(const char *optstr);
 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
                     const char *optstr);
-DriveInfo *drive_init(QemuOpts *arg, BlockInterfaceType block_default_type);
+DriveInfo *drive_new(QemuOpts *arg, BlockInterfaceType block_default_type);
+void drive_del(DriveInfo *dinfo);
 
 /* device-hotplug */
 
diff --git a/qapi-schema.json b/qapi-schema.json
index 14b498b..dc2abe4 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2855,12 +2855,15 @@
 #
 # @help: #optional human readable text string, not suitable for parsing.
 #
+# @default: #optional default value string (since 2.1)
+#
 # Since 1.5
 ##
 { 'type': 'CommandLineParameterInfo',
   'data': { 'name': 'str',
             'type': 'CommandLineParameterType',
-            '*help': 'str' } }
+            '*help': 'str',
+            '*default': 'str' } }
 
 ##
 # @CommandLineOptionInfo:
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index 16382e7..f2ad6d7 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -143,8 +143,8 @@ opts_start_struct(Visitor *v, void **obj, const char *kind,
     if (ov->opts_root->id != NULL) {
         ov->fake_id_opt = g_malloc0(sizeof *ov->fake_id_opt);
 
-        ov->fake_id_opt->name = "id";
-        ov->fake_id_opt->str = ov->opts_root->id;
+        ov->fake_id_opt->name = g_strdup("id");
+        ov->fake_id_opt->str = g_strdup(ov->opts_root->id);
         opts_visitor_insert(ov->unprocessed_opts, ov->fake_id_opt);
     }
 }
@@ -177,7 +177,11 @@ opts_end_struct(Visitor *v, Error **errp)
     }
     g_hash_table_destroy(ov->unprocessed_opts);
     ov->unprocessed_opts = NULL;
-    g_free(ov->fake_id_opt);
+    if (ov->fake_id_opt) {
+        g_free(ov->fake_id_opt->name);
+        g_free(ov->fake_id_opt->str);
+        g_free(ov->fake_id_opt);
+    }
     ov->fake_id_opt = NULL;
 }
 
diff --git a/qemu-img.c b/qemu-img.c
index aa89ba2..c98896b 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -271,7 +271,7 @@ static int read_password(char *buf, int buf_size)
 static int print_block_option_help(const char *filename, const char *fmt)
 {
     BlockDriver *drv, *proto_drv;
-    QEMUOptionParameter *create_options = NULL;
+    QemuOptsList *create_opts = NULL;
 
     /* Find driver and parse its options */
     drv = bdrv_find_format(fmt);
@@ -280,22 +280,19 @@ static int print_block_option_help(const char *filename, const char *fmt)
         return 1;
     }
 
-    create_options = append_option_parameters(create_options,
-                                              drv->create_options);
-
+    create_opts = qemu_opts_append(create_opts, drv->create_opts);
     if (filename) {
         proto_drv = bdrv_find_protocol(filename, true);
         if (!proto_drv) {
             error_report("Unknown protocol '%s'", filename);
-            free_option_parameters(create_options);
+            qemu_opts_free(create_opts);
             return 1;
         }
-        create_options = append_option_parameters(create_options,
-                                                  proto_drv->create_options);
+        create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
     }
 
-    print_option_help(create_options);
-    free_option_parameters(create_options);
+    qemu_opts_print_help(create_opts);
+    qemu_opts_free(create_opts);
     return 0;
 }
 
@@ -349,19 +346,19 @@ fail:
     return NULL;
 }
 
-static int add_old_style_options(const char *fmt, QEMUOptionParameter *list,
+static int add_old_style_options(const char *fmt, QemuOpts *opts,
                                  const char *base_filename,
                                  const char *base_fmt)
 {
     if (base_filename) {
-        if (set_option_parameter(list, BLOCK_OPT_BACKING_FILE, base_filename)) {
+        if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) {
             error_report("Backing file not supported for file format '%s'",
                          fmt);
             return -1;
         }
     }
     if (base_fmt) {
-        if (set_option_parameter(list, BLOCK_OPT_BACKING_FMT, base_fmt)) {
+        if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) {
             error_report("Backing file format not supported for file "
                          "format '%s'", fmt);
             return -1;
@@ -1191,8 +1188,9 @@ static int img_convert(int argc, char **argv)
     size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE;
     const uint8_t *buf1;
     BlockDriverInfo bdi;
-    QEMUOptionParameter *param = NULL, *create_options = NULL;
-    QEMUOptionParameter *out_baseimg_param;
+    QemuOpts *opts = NULL;
+    QemuOptsList *create_opts = NULL;
+    const char *out_baseimg_param;
     char *options = NULL;
     const char *snapshot_name = NULL;
     int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */
@@ -1381,40 +1379,34 @@ static int img_convert(int argc, char **argv)
         goto out;
     }
 
-    create_options = append_option_parameters(create_options,
-                                              drv->create_options);
-    create_options = append_option_parameters(create_options,
-                                              proto_drv->create_options);
+    create_opts = qemu_opts_append(create_opts, drv->create_opts);
+    create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
 
-    if (options) {
-        param = parse_option_parameters(options, create_options, param);
-        if (param == NULL) {
-            error_report("Invalid options for file format '%s'.", out_fmt);
-            ret = -1;
-            goto out;
-        }
-    } else {
-        param = parse_option_parameters("", create_options, param);
+    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
+    if (options && qemu_opts_do_parse(opts, options, NULL)) {
+        error_report("Invalid options for file format '%s'", out_fmt);
+        ret = -1;
+        goto out;
     }
 
-    set_option_parameter_int(param, BLOCK_OPT_SIZE, total_sectors * 512);
-    ret = add_old_style_options(out_fmt, param, out_baseimg, NULL);
+    qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512);
+    ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
     if (ret < 0) {
         goto out;
     }
 
     /* Get backing file name if -o backing_file was used */
-    out_baseimg_param = get_option_parameter(param, BLOCK_OPT_BACKING_FILE);
+    out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE);
     if (out_baseimg_param) {
-        out_baseimg = out_baseimg_param->value.s;
+        out_baseimg = out_baseimg_param;
     }
 
     /* Check if compression is supported */
     if (compress) {
-        QEMUOptionParameter *encryption =
-            get_option_parameter(param, BLOCK_OPT_ENCRYPT);
-        QEMUOptionParameter *preallocation =
-            get_option_parameter(param, BLOCK_OPT_PREALLOC);
+        bool encryption =
+            qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false);
+        const char *preallocation =
+            qemu_opt_get(opts, BLOCK_OPT_PREALLOC);
 
         if (!drv->bdrv_write_compressed) {
             error_report("Compression not supported for this file format");
@@ -1422,15 +1414,15 @@ static int img_convert(int argc, char **argv)
             goto out;
         }
 
-        if (encryption && encryption->value.n) {
+        if (encryption) {
             error_report("Compression and encryption not supported at "
                          "the same time");
             ret = -1;
             goto out;
         }
 
-        if (preallocation && preallocation->value.s
-            && strcmp(preallocation->value.s, "off"))
+        if (preallocation
+            && strcmp(preallocation, "off"))
         {
             error_report("Compression and preallocation not supported at "
                          "the same time");
@@ -1441,7 +1433,7 @@ static int img_convert(int argc, char **argv)
 
     if (!skip_create) {
         /* Create the new image */
-        ret = bdrv_create(drv, out_filename, param, &local_err);
+        ret = bdrv_create(drv, out_filename, opts, &local_err);
         if (ret < 0) {
             error_report("%s: error while converting %s: %s",
                          out_filename, out_fmt, error_get_pretty(local_err));
@@ -1706,8 +1698,8 @@ out:
         qemu_progress_print(100, 0);
     }
     qemu_progress_end();
-    free_option_parameters(create_options);
-    free_option_parameters(param);
+    qemu_opts_del(opts);
+    qemu_opts_free(create_opts);
     qemu_vfree(buf);
     if (sn_opts) {
         qemu_opts_del(sn_opts);
@@ -2698,7 +2690,8 @@ static int img_amend(int argc, char **argv)
 {
     int c, ret = 0;
     char *options = NULL;
-    QEMUOptionParameter *create_options = NULL, *options_param = NULL;
+    QemuOptsList *create_opts = NULL;
+    QemuOpts *opts = NULL;
     const char *fmt = NULL, *filename;
     bool quiet = false;
     BlockDriverState *bs = NULL;
@@ -2769,17 +2762,15 @@ static int img_amend(int argc, char **argv)
         goto out;
     }
 
-    create_options = append_option_parameters(create_options,
-            bs->drv->create_options);
-    options_param = parse_option_parameters(options, create_options,
-            options_param);
-    if (options_param == NULL) {
+    create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
+    opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
+    if (options && qemu_opts_do_parse(opts, options, NULL)) {
         error_report("Invalid options for file format '%s'", fmt);
         ret = -1;
         goto out;
     }
 
-    ret = bdrv_amend_options(bs, options_param);
+    ret = bdrv_amend_options(bs, opts);
     if (ret < 0) {
         error_report("Error while amending options: %s", strerror(-ret));
         goto out;
@@ -2789,8 +2780,8 @@ out:
     if (bs) {
         bdrv_unref(bs);
     }
-    free_option_parameters(create_options);
-    free_option_parameters(options_param);
+    qemu_opts_del(opts);
+    qemu_opts_free(create_opts);
     g_free(options);
 
     if (ret) {
diff --git a/qmp-commands.hx b/qmp-commands.hx
index d8aa4ed..d6bb0f4 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2898,6 +2898,8 @@ Each array entry contains the following:
               or 'size')
     - "help": human readable description of the parameter
               (json-string, optional)
+    - "default": default value string for the parameter
+                 (json-string, optional)
 
 Example:
 
diff --git a/tests/qemu-iotests/049.out b/tests/qemu-iotests/049.out
index ceb2328..71ca44d 100644
--- a/tests/qemu-iotests/049.out
+++ b/tests/qemu-iotests/049.out
@@ -120,7 +120,7 @@ qemu-img: kilobytes, megabytes, gigabytes, terabytes, petabytes and exabytes.
 
 qemu-img create -f qcow2 -o size=foobar TEST_DIR/t.qcow2
 qemu-img: Parameter 'size' expects a size
-qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'.
+qemu-img: TEST_DIR/t.qcow2: Invalid options for file format 'qcow2'
 
 == Check correct interpretation of suffixes for cluster size ==
 
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index 4027e00..e372470 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -281,7 +281,7 @@ Lazy refcounts only supported with compatibility level 1.1 and above (use compat
 qemu-img: Error while amending options: Invalid argument
 Unknown compatibility level 0.42.
 qemu-img: Error while amending options: Invalid argument
-Unknown option 'foo'
+qemu-img: Invalid parameter 'foo'
 qemu-img: Invalid options for file format 'qcow2'
 Changing the cluster size is not supported.
 qemu-img: Error while amending options: Operation not supported
diff --git a/tests/qemu-iotests/081.out b/tests/qemu-iotests/081.out
index 84aeb0c..2241cec 100644
--- a/tests/qemu-iotests/081.out
+++ b/tests/qemu-iotests/081.out
@@ -45,5 +45,5 @@ wrote 10485760/10485760 bytes at offset 0
 10 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 == checking that quorum is broken ==
-qemu-io: can't open device (null): Could not read image for determining its format: Input/output error
+qemu-io: can't open: Could not read image for determining its format: Input/output error
 *** done
diff --git a/util/qemu-config.c b/util/qemu-config.c
index f4e4f38..ba375c0 100644
--- a/util/qemu-config.c
+++ b/util/qemu-config.c
@@ -82,6 +82,10 @@ static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
             info->has_help = true;
             info->help = g_strdup(desc[i].help);
         }
+        if (desc[i].def_value_str) {
+            info->has_q_default = true;
+            info->q_default = g_strdup(desc[i].def_value_str);
+        }
 
         entry = g_malloc0(sizeof(*entry));
         entry->value = info;
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 324e4c5..836055a 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -123,22 +123,6 @@ int get_param_value(char *buf, int buf_size,
     return get_next_param_value(buf, buf_size, tag, &str);
 }
 
-/*
- * Searches an option list for an option with the given name
- */
-QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
-    const char *name)
-{
-    while (list && list->name) {
-        if (!strcmp(list->name, name)) {
-            return list;
-        }
-        list++;
-    }
-
-    return NULL;
-}
-
 static void parse_option_bool(const char *name, const char *value, bool *ret,
                               Error **errp)
 {
@@ -173,6 +157,20 @@ static void parse_option_number(const char *name, const char *value,
     }
 }
 
+static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
+                                            const char *name)
+{
+    int i;
+
+    for (i = 0; desc[i].name != NULL; i++) {
+        if (strcmp(desc[i].name, name) == 0) {
+            return &desc[i];
+        }
+    }
+
+    return NULL;
+}
+
 void parse_option_size(const char *name, const char *value,
                        uint64_t *ret, Error **errp)
 {
@@ -212,244 +210,6 @@ void parse_option_size(const char *name, const char *value,
     }
 }
 
-/*
- * Sets the value of a parameter in a given option list. The parsing of the
- * value depends on the type of option:
- *
- * OPT_FLAG (uses value.n):
- *      If no value is given, the flag is set to 1.
- *      Otherwise the value must be "on" (set to 1) or "off" (set to 0)
- *
- * OPT_STRING (uses value.s):
- *      value is strdup()ed and assigned as option value
- *
- * OPT_SIZE (uses value.n):
- *      The value is converted to an integer. Suffixes for kilobytes etc. are
- *      allowed (powers of 1024).
- *
- * Returns 0 on succes, -1 in error cases
- */
-int set_option_parameter(QEMUOptionParameter *list, const char *name,
-    const char *value)
-{
-    bool flag;
-    Error *local_err = NULL;
-
-    // Find a matching parameter
-    list = get_option_parameter(list, name);
-    if (list == NULL) {
-        fprintf(stderr, "Unknown option '%s'\n", name);
-        return -1;
-    }
-
-    // Process parameter
-    switch (list->type) {
-    case OPT_FLAG:
-        parse_option_bool(name, value, &flag, &local_err);
-        if (!local_err) {
-            list->value.n = flag;
-        }
-        break;
-
-    case OPT_STRING:
-        if (value != NULL) {
-            list->value.s = g_strdup(value);
-        } else {
-            fprintf(stderr, "Option '%s' needs a parameter\n", name);
-            return -1;
-        }
-        break;
-
-    case OPT_SIZE:
-        parse_option_size(name, value, &list->value.n, &local_err);
-        break;
-
-    default:
-        fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name);
-        return -1;
-    }
-
-    if (local_err) {
-        qerror_report_err(local_err);
-        error_free(local_err);
-        return -1;
-    }
-
-    list->assigned = true;
-
-    return 0;
-}
-
-/*
- * Sets the given parameter to an integer instead of a string.
- * This function cannot be used to set string options.
- *
- * Returns 0 on success, -1 in error cases
- */
-int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
-    uint64_t value)
-{
-    // Find a matching parameter
-    list = get_option_parameter(list, name);
-    if (list == NULL) {
-        fprintf(stderr, "Unknown option '%s'\n", name);
-        return -1;
-    }
-
-    // Process parameter
-    switch (list->type) {
-    case OPT_FLAG:
-    case OPT_NUMBER:
-    case OPT_SIZE:
-        list->value.n = value;
-        break;
-
-    default:
-        return -1;
-    }
-
-    list->assigned = true;
-
-    return 0;
-}
-
-/*
- * Frees a option list. If it contains strings, the strings are freed as well.
- */
-void free_option_parameters(QEMUOptionParameter *list)
-{
-    QEMUOptionParameter *cur = list;
-
-    while (cur && cur->name) {
-        if (cur->type == OPT_STRING) {
-            g_free(cur->value.s);
-        }
-        cur++;
-    }
-
-    g_free(list);
-}
-
-/*
- * Count valid options in list
- */
-static size_t count_option_parameters(QEMUOptionParameter *list)
-{
-    size_t num_options = 0;
-
-    while (list && list->name) {
-        num_options++;
-        list++;
-    }
-
-    return num_options;
-}
-
-/*
- * Append an option list (list) to an option list (dest).
- *
- * If dest is NULL, a new copy of list is created.
- *
- * Returns a pointer to the first element of dest (or the newly allocated copy)
- */
-QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest,
-    QEMUOptionParameter *list)
-{
-    size_t num_options, num_dest_options;
-
-    num_options = count_option_parameters(dest);
-    num_dest_options = num_options;
-
-    num_options += count_option_parameters(list);
-
-    dest = g_realloc(dest, (num_options + 1) * sizeof(QEMUOptionParameter));
-    dest[num_dest_options].name = NULL;
-
-    while (list && list->name) {
-        if (get_option_parameter(dest, list->name) == NULL) {
-            dest[num_dest_options++] = *list;
-            dest[num_dest_options].name = NULL;
-        }
-        list++;
-    }
-
-    return dest;
-}
-
-/*
- * Parses a parameter string (param) into an option list (dest).
- *
- * list is the template option list. If dest is NULL, a new copy of list is
- * created. If list is NULL, this function fails.
- *
- * A parameter string consists of one or more parameters, separated by commas.
- * Each parameter consists of its name and possibly of a value. In the latter
- * case, the value is delimited by an = character. To specify a value which
- * contains commas, double each comma so it won't be recognized as the end of
- * the parameter.
- *
- * For more details of the parsing see above.
- *
- * Returns a pointer to the first element of dest (or the newly allocated copy)
- * or NULL in error cases
- */
-QEMUOptionParameter *parse_option_parameters(const char *param,
-    QEMUOptionParameter *list, QEMUOptionParameter *dest)
-{
-    QEMUOptionParameter *allocated = NULL;
-    char name[256];
-    char value[256];
-    char *param_delim, *value_delim;
-    char next_delim;
-    int i;
-
-    if (list == NULL) {
-        return NULL;
-    }
-
-    if (dest == NULL) {
-        dest = allocated = append_option_parameters(NULL, list);
-    }
-
-    for (i = 0; dest[i].name; i++) {
-        dest[i].assigned = false;
-    }
-
-    while (*param) {
-
-        // Find parameter name and value in the string
-        param_delim = strchr(param, ',');
-        value_delim = strchr(param, '=');
-
-        if (value_delim && (value_delim < param_delim || !param_delim)) {
-            next_delim = '=';
-        } else {
-            next_delim = ',';
-            value_delim = NULL;
-        }
-
-        param = get_opt_name(name, sizeof(name), param, next_delim);
-        if (value_delim) {
-            param = get_opt_value(value, sizeof(value), param + 1);
-        }
-        if (*param != '\0') {
-            param++;
-        }
-
-        // Set the parameter
-        if (set_option_parameter(dest, name, value_delim ? value : NULL)) {
-            goto fail;
-        }
-    }
-
-    return dest;
-
-fail:
-    // Only free the list if it was newly allocated
-    free_option_parameters(allocated);
-    return NULL;
-}
-
 bool has_help_option(const char *param)
 {
     size_t buflen = strlen(param) + 1;
@@ -499,49 +259,22 @@ out:
     return result;
 }
 
-/*
- * Prints all options of a list that have a value to stdout
- */
-void print_option_parameters(QEMUOptionParameter *list)
+void qemu_opts_print_help(QemuOptsList *list)
 {
-    while (list && list->name) {
-        switch (list->type) {
-            case OPT_STRING:
-                 if (list->value.s != NULL) {
-                     printf("%s='%s' ", list->name, list->value.s);
-                 }
-                break;
-            case OPT_FLAG:
-                printf("%s=%s ", list->name, list->value.n ? "on" : "off");
-                break;
-            case OPT_SIZE:
-            case OPT_NUMBER:
-                printf("%s=%" PRId64 " ", list->name, list->value.n);
-                break;
-            default:
-                printf("%s=(unknown type) ", list->name);
-                break;
-        }
-        list++;
-    }
-}
+    QemuOptDesc *desc;
 
-/*
- * Prints an overview of all available options
- */
-void print_option_help(QEMUOptionParameter *list)
-{
+    assert(list);
+    desc = list->desc;
     printf("Supported options:\n");
-    while (list && list->name) {
-        printf("%-16s %s\n", list->name,
-            list->help ? list->help : "No description available");
-        list++;
+    while (desc && desc->name) {
+        printf("%-16s %s\n", desc->name,
+               desc->help ? desc->help : "No description available");
+        desc++;
     }
 }
-
 /* ------------------------------------------------------------------ */
 
-static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
+QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
 {
     QemuOpt *opt;
 
@@ -553,12 +286,69 @@ static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
     return NULL;
 }
 
+static void qemu_opt_del(QemuOpt *opt)
+{
+    QTAILQ_REMOVE(&opt->opts->head, opt, next);
+    g_free(opt->name);
+    g_free(opt->str);
+    g_free(opt);
+}
+
+/* qemu_opt_set allows many settings for the same option.
+ * This function deletes all settings for an option.
+ */
+static void qemu_opt_del_all(QemuOpts *opts, const char *name)
+{
+    QemuOpt *opt, *next_opt;
+
+    QTAILQ_FOREACH_SAFE(opt, &opts->head, next, next_opt) {
+        if (!strcmp(opt->name, name)) {
+            qemu_opt_del(opt);
+        }
+    }
+}
+
 const char *qemu_opt_get(QemuOpts *opts, const char *name)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
+
+    if (!opt) {
+        const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
+        if (desc && desc->def_value_str) {
+            return desc->def_value_str;
+        }
+    }
     return opt ? opt->str : NULL;
 }
 
+/* Get a known option (or its default) and remove it from the list
+ * all in one action. Return a malloced string of the option value.
+ * Result must be freed by caller with g_free().
+ */
+char *qemu_opt_get_del(QemuOpts *opts, const char *name)
+{
+    QemuOpt *opt;
+    const QemuOptDesc *desc;
+    char *str = NULL;
+
+    if (opts == NULL) {
+        return NULL;
+    }
+
+    opt = qemu_opt_find(opts, name);
+    if (!opt) {
+        desc = find_desc_by_name(opts->list->desc, name);
+        if (desc && desc->def_value_str) {
+            str = g_strdup(desc->def_value_str);
+        }
+        return str;
+    }
+    str = opt->str;
+    opt->str = NULL;
+    qemu_opt_del_all(opts, name);
+    return str;
+}
+
 bool qemu_opt_has_help_opt(QemuOpts *opts)
 {
     QemuOpt *opt;
@@ -571,34 +361,99 @@ bool qemu_opt_has_help_opt(QemuOpts *opts)
     return false;
 }
 
-bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
+static bool qemu_opt_get_bool_helper(QemuOpts *opts, const char *name,
+                                     bool defval, bool del)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
+    bool ret = defval;
 
-    if (opt == NULL)
-        return defval;
+    if (opt == NULL) {
+        const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
+        if (desc && desc->def_value_str) {
+            parse_option_bool(name, desc->def_value_str, &ret, &error_abort);
+        }
+        return ret;
+    }
     assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL);
-    return opt->value.boolean;
+    ret = opt->value.boolean;
+    if (del) {
+        qemu_opt_del_all(opts, name);
+    }
+    return ret;
 }
 
-uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
+bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval)
+{
+    return qemu_opt_get_bool_helper(opts, name, defval, false);
+}
+
+bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval)
+{
+    return qemu_opt_get_bool_helper(opts, name, defval, true);
+}
+
+static uint64_t qemu_opt_get_number_helper(QemuOpts *opts, const char *name,
+                                           uint64_t defval, bool del)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
+    uint64_t ret = defval;
 
-    if (opt == NULL)
-        return defval;
+    if (opt == NULL) {
+        const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
+        if (desc && desc->def_value_str) {
+            parse_option_number(name, desc->def_value_str, &ret, &error_abort);
+        }
+        return ret;
+    }
     assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER);
-    return opt->value.uint;
+    ret = opt->value.uint;
+    if (del) {
+        qemu_opt_del_all(opts, name);
+    }
+    return ret;
 }
 
-uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
+uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval)
+{
+    return qemu_opt_get_number_helper(opts, name, defval, false);
+}
+
+uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
+                                 uint64_t defval)
+{
+    return qemu_opt_get_number_helper(opts, name, defval, true);
+}
+
+static uint64_t qemu_opt_get_size_helper(QemuOpts *opts, const char *name,
+                                         uint64_t defval, bool del)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
+    uint64_t ret = defval;
 
-    if (opt == NULL)
-        return defval;
+    if (opt == NULL) {
+        const QemuOptDesc *desc = find_desc_by_name(opts->list->desc, name);
+        if (desc && desc->def_value_str) {
+            parse_option_size(name, desc->def_value_str, &ret, &error_abort);
+        }
+        return ret;
+    }
     assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE);
-    return opt->value.uint;
+    ret = opt->value.uint;
+    if (del) {
+        qemu_opt_del_all(opts, name);
+    }
+    return ret;
+}
+
+uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval)
+{
+    return qemu_opt_get_size_helper(opts, name, defval, false);
+}
+
+uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
+                               uint64_t defval)
+{
+    return qemu_opt_get_size_helper(opts, name, defval, true);
 }
 
 static void qemu_opt_parse(QemuOpt *opt, Error **errp)
@@ -624,33 +479,11 @@ static void qemu_opt_parse(QemuOpt *opt, Error **errp)
     }
 }
 
-static void qemu_opt_del(QemuOpt *opt)
-{
-    QTAILQ_REMOVE(&opt->opts->head, opt, next);
-    g_free((/* !const */ char*)opt->name);
-    g_free((/* !const */ char*)opt->str);
-    g_free(opt);
-}
-
 static bool opts_accepts_any(const QemuOpts *opts)
 {
     return opts->list->desc[0].name == NULL;
 }
 
-static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
-                                            const char *name)
-{
-    int i;
-
-    for (i = 0; desc[i].name != NULL; i++) {
-        if (strcmp(desc[i].name, name) == 0) {
-            return &desc[i];
-        }
-    }
-
-    return NULL;
-}
-
 int qemu_opt_unset(QemuOpts *opts, const char *name)
 {
     QemuOpt *opt = qemu_opt_find(opts, name);
@@ -884,6 +717,10 @@ void qemu_opts_del(QemuOpts *opts)
 {
     QemuOpt *opt;
 
+    if (opts == NULL) {
+        return;
+    }
+
     for (;;) {
         opt = QTAILQ_FIRST(&opts->head);
         if (opt == NULL)
@@ -895,17 +732,34 @@ void qemu_opts_del(QemuOpts *opts)
     g_free(opts);
 }
 
-int qemu_opts_print(QemuOpts *opts, void *dummy)
+void qemu_opts_print(QemuOpts *opts)
 {
     QemuOpt *opt;
+    QemuOptDesc *desc = opts->list->desc;
 
-    fprintf(stderr, "%s: %s:", opts->list->name,
-            opts->id ? opts->id : "<noid>");
-    QTAILQ_FOREACH(opt, &opts->head, next) {
-        fprintf(stderr, " %s=\"%s\"", opt->name, opt->str);
+    if (desc[0].name == NULL) {
+        QTAILQ_FOREACH(opt, &opts->head, next) {
+            printf("%s=\"%s\" ", opt->name, opt->str);
+        }
+        return;
+    }
+    for (; desc && desc->name; desc++) {
+        const char *value;
+        QemuOpt *opt = qemu_opt_find(opts, desc->name);
+
+        value = opt ? opt->str : desc->def_value_str;
+        if (!value) {
+            continue;
+        }
+        if (desc->type == QEMU_OPT_STRING) {
+            printf("%s='%s' ", desc->name, value);
+        } else if ((desc->type == QEMU_OPT_SIZE ||
+                    desc->type == QEMU_OPT_NUMBER) && opt) {
+            printf("%s=%" PRId64 " ", desc->name, opt->value.uint);
+        } else {
+            printf("%s=%s ", desc->name, value);
+        }
     }
-    fprintf(stderr, "\n");
-    return 0;
 }
 
 static int opts_do_parse(QemuOpts *opts, const char *params,
@@ -1202,3 +1056,77 @@ int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
     loc_pop(&loc);
     return rc;
 }
+
+static size_t count_opts_list(QemuOptsList *list)
+{
+    QemuOptDesc *desc = NULL;
+    size_t num_opts = 0;
+
+    if (!list) {
+        return 0;
+    }
+
+    desc = list->desc;
+    while (desc && desc->name) {
+        num_opts++;
+        desc++;
+    }
+
+    return num_opts;
+}
+
+void qemu_opts_free(QemuOptsList *list)
+{
+    g_free(list);
+}
+
+/* Realloc dst option list and append options from an option list (list)
+ * to it. dst could be NULL or a malloced list.
+ * The lifetime of dst must be shorter than the input list because the
+ * QemuOptDesc->name, ->help, and ->def_value_str strings are shared.
+ */
+QemuOptsList *qemu_opts_append(QemuOptsList *dst,
+                               QemuOptsList *list)
+{
+    size_t num_opts, num_dst_opts;
+    QemuOptDesc *desc;
+    bool need_init = false;
+
+    if (!list) {
+        return dst;
+    }
+
+    /* If dst is NULL, after realloc, some area of dst should be initialized
+     * before adding options to it.
+     */
+    if (!dst) {
+        need_init = true;
+    }
+
+    num_opts = count_opts_list(dst);
+    num_dst_opts = num_opts;
+    num_opts += count_opts_list(list);
+    dst = g_realloc(dst, sizeof(QemuOptsList) +
+                    (num_opts + 1) * sizeof(QemuOptDesc));
+    if (need_init) {
+        dst->name = NULL;
+        dst->implied_opt_name = NULL;
+        QTAILQ_INIT(&dst->head);
+        dst->merge_lists = false;
+    }
+    dst->desc[num_dst_opts].name = NULL;
+
+    /* append list->desc to dst->desc */
+    if (list) {
+        desc = list->desc;
+        while (desc && desc->name) {
+            if (find_desc_by_name(dst->desc, desc->name) == NULL) {
+                dst->desc[num_dst_opts++] = *desc;
+                dst->desc[num_dst_opts].name = NULL;
+            }
+            desc++;
+        }
+    }
+
+    return dst;
+}
diff --git a/vl.c b/vl.c
index ac0e3d7..be69c7f 100644
--- a/vl.c
+++ b/vl.c
@@ -1074,7 +1074,7 @@ static int drive_init_func(QemuOpts *opts, void *opaque)
 {
     BlockInterfaceType *block_default_type = opaque;
 
-    return drive_init(opts, *block_default_type) == NULL;
+    return drive_new(opts, *block_default_type) == NULL;
 }
 
 static int drive_enable_snapshot(QemuOpts *opts, void *opaque)
@@ -1098,7 +1098,7 @@ static void default_drive(int enable, int snapshot, BlockInterfaceType type,
     if (snapshot) {
         drive_enable_snapshot(opts, NULL);
     }
-    if (!drive_init(opts, type)) {
+    if (!drive_new(opts, type)) {
         exit(1);
     }
 }