#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qmp/qjson.h"
+#include "qapi/qmp/qnull.h"
#include "qapi/qmp/qstring.h"
+#include "qapi/qobject-output-visitor.h"
+#include "qapi/qapi-visit-block-core.h"
#include "sysemu/block-backend.h"
#include "sysemu/sysemu.h"
#include "qemu/notify.h"
return bdrv_do_find_format(format_name);
}
-static int bdrv_is_whitelisted(BlockDriver *drv, bool read_only)
+int bdrv_is_whitelisted(BlockDriver *drv, bool read_only)
{
static const char *whitelist_rw[] = {
CONFIG_BDRV_RW_WHITELIST
ret = bdrv_open_driver(bs, drv, node_name, bs->options, flags, errp);
if (ret < 0) {
- QDECREF(bs->explicit_options);
+ qobject_unref(bs->explicit_options);
bs->explicit_options = NULL;
- QDECREF(bs->options);
+ qobject_unref(bs->options);
bs->options = NULL;
bdrv_unref(bs);
return NULL;
return NULL;
}
- options = qobject_to_qdict(options_obj);
+ options = qobject_to(QDict, options_obj);
if (!options) {
- qobject_decref(options_obj);
+ qobject_unref(options_obj);
error_setg(errp, "Invalid JSON object given");
return NULL;
}
/* Options given in the filename have lower priority than options
* specified directly */
qdict_join(options, json_options, false);
- QDECREF(json_options);
+ qobject_unref(json_options);
*pfilename = NULL;
}
if (reference || qdict_haskey(options, "file.filename")) {
backing_filename[0] = '\0';
} else if (bs->backing_file[0] == '\0' && qdict_size(options) == 0) {
- QDECREF(options);
+ qobject_unref(options);
goto free_exit;
} else {
bdrv_get_full_backing_filename(bs, backing_filename, PATH_MAX,
if (local_err) {
ret = -EINVAL;
error_propagate(errp, local_err);
- QDECREF(options);
+ qobject_unref(options);
goto free_exit;
}
}
if (!bs->drv || !bs->drv->supports_backing) {
ret = -EINVAL;
error_setg(errp, "Driver doesn't support backing files");
- QDECREF(options);
+ qobject_unref(options);
goto free_exit;
}
free_exit:
g_free(backing_filename);
- QDECREF(tmp_parent_options);
+ qobject_unref(tmp_parent_options);
return ret;
}
error_setg(errp, "A block device must be specified for \"%s\"",
bdref_key);
}
- QDECREF(image_options);
+ qobject_unref(image_options);
goto done;
}
return c;
}
+/* TODO Future callers may need to specify parent/child_role in order for
+ * option inheritance to work. Existing callers use it for the root node. */
+BlockDriverState *bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp)
+{
+ BlockDriverState *bs = NULL;
+ Error *local_err = NULL;
+ QObject *obj = NULL;
+ QDict *qdict = NULL;
+ const char *reference = NULL;
+ Visitor *v = NULL;
+
+ if (ref->type == QTYPE_QSTRING) {
+ reference = ref->u.reference;
+ } else {
+ BlockdevOptions *options = &ref->u.definition;
+ assert(ref->type == QTYPE_QDICT);
+
+ v = qobject_output_visitor_new(&obj);
+ visit_type_BlockdevOptions(v, NULL, &options, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ goto fail;
+ }
+ visit_complete(v, &obj);
+
+ qdict = qobject_to(QDict, obj);
+ qdict_flatten(qdict);
+
+ /* bdrv_open_inherit() defaults to the values in bdrv_flags (for
+ * compatibility with other callers) rather than what we want as the
+ * real defaults. Apply the defaults here instead. */
+ qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
+ qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
+ qdict_set_default_str(qdict, BDRV_OPT_READ_ONLY, "off");
+ }
+
+ bs = bdrv_open_inherit(NULL, reference, qdict, 0, NULL, NULL, errp);
+ obj = NULL;
+
+fail:
+ qobject_unref(obj);
+ visit_free(v);
+ return bs;
+}
+
static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
int flags,
QDict *snapshot_options,
}
out:
- QDECREF(snapshot_options);
+ qobject_unref(snapshot_options);
g_free(tmp_filename);
return bs_snapshot;
}
* options is a QDict of options to pass to the block drivers, or NULL for an
* empty set of options. The reference to the QDict belongs to the block layer
* after the call (even on failure), so if the caller intends to reuse the
- * dictionary, it needs to use QINCREF() before calling bdrv_open.
+ * dictionary, it needs to use qobject_ref() before calling bdrv_open.
*
* If *pbs is NULL, a new BDS will be created with a pointer to it stored there.
* If it is not NULL, the referenced BDS will be reused.
if (reference) {
bool options_non_empty = options ? qdict_size(options) : false;
- QDECREF(options);
+ qobject_unref(options);
if (filename || options_non_empty) {
error_setg(errp, "Cannot reference an existing block device with "
/* See cautionary note on accessing @options above */
backing = qdict_get_try_str(options, "backing");
- if (backing && *backing == '\0') {
+ if (qobject_to(QNull, qdict_get(options, "backing")) != NULL ||
+ (backing && *backing == '\0'))
+ {
+ if (backing) {
+ warn_report("Use of \"backing\": \"\" is deprecated; "
+ "use \"backing\": null instead");
+ }
flags |= BDRV_O_NO_BACKING;
qdict_del(options, "backing");
}
bdrv_parent_cb_change_media(bs, true);
- QDECREF(options);
+ qobject_unref(options);
/* For snapshot=on, create a temporary qcow2 overlay. bs points to the
* temporary snapshot afterwards. */
fail:
blk_unref(file);
- QDECREF(snapshot_options);
- QDECREF(bs->explicit_options);
- QDECREF(bs->options);
- QDECREF(options);
+ qobject_unref(snapshot_options);
+ qobject_unref(bs->explicit_options);
+ qobject_unref(bs->options);
+ qobject_unref(options);
bs->options = NULL;
bs->explicit_options = NULL;
bdrv_unref(bs);
close_and_fail:
bdrv_unref(bs);
- QDECREF(snapshot_options);
- QDECREF(options);
+ qobject_unref(snapshot_options);
+ qobject_unref(options);
error_propagate(errp, local_err);
return NULL;
}
old_options = qdict_clone_shallow(bs->explicit_options);
}
bdrv_join_options(bs, options, old_options);
- QDECREF(old_options);
+ qobject_unref(old_options);
explicit_options = qdict_clone_shallow(options);
/* Inherit from parent node */
if (parent_options) {
+ QemuOpts *opts;
+ QDict *options_copy;
assert(!flags);
role->inherit_options(&flags, options, parent_flags, parent_options);
+ options_copy = qdict_clone_shallow(options);
+ opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, options_copy, NULL);
+ update_flags_from_options(&flags, opts);
+ qemu_opts_del(opts);
+ qobject_unref(options_copy);
}
/* Old values are used for options that aren't set yet */
old_options = qdict_clone_shallow(bs->options);
bdrv_join_options(bs, options, old_options);
- QDECREF(old_options);
+ qobject_unref(old_options);
/* bdrv_open_inherit() sets and clears some additional flags internally */
flags &= ~BDRV_O_PROTOCOL;
bs_entry = g_new0(BlockReopenQueueEntry, 1);
QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
} else {
- QDECREF(bs_entry->state.options);
- QDECREF(bs_entry->state.explicit_options);
+ qobject_unref(bs_entry->state.options);
+ qobject_unref(bs_entry->state.explicit_options);
}
bs_entry->state.bs = bs;
if (ret && bs_entry->prepared) {
bdrv_reopen_abort(&bs_entry->state);
} else if (ret) {
- QDECREF(bs_entry->state.explicit_options);
+ qobject_unref(bs_entry->state.explicit_options);
}
- QDECREF(bs_entry->state.options);
+ qobject_unref(bs_entry->state.options);
g_free(bs_entry);
}
g_free(bs_queue);
}
/* set BDS specific flags now */
- QDECREF(bs->explicit_options);
+ qobject_unref(bs->explicit_options);
bs->explicit_options = reopen_state->explicit_options;
bs->open_flags = reopen_state->flags;
drv->bdrv_reopen_abort(reopen_state);
}
- QDECREF(reopen_state->explicit_options);
+ qobject_unref(reopen_state->explicit_options);
bdrv_abort_perm_update(reopen_state->bs);
}
bs->total_sectors = 0;
bs->encrypted = false;
bs->sg = false;
- QDECREF(bs->options);
- QDECREF(bs->explicit_options);
+ qobject_unref(bs->options);
+ qobject_unref(bs->explicit_options);
bs->options = NULL;
bs->explicit_options = NULL;
- QDECREF(bs->full_open_options);
+ qobject_unref(bs->full_open_options);
bs->full_open_options = NULL;
bdrv_release_named_dirty_bitmaps(bs);
GSList *ignore_children = g_slist_prepend(NULL, c);
bdrv_check_update_perm(base, NULL, c->perm, c->shared_perm,
ignore_children, &local_err);
+ g_slist_free(ignore_children);
if (local_err) {
ret = -EPERM;
error_report_err(local_err);
goto exit;
}
- g_slist_free(ignore_children);
/* If so, update the backing file path in the image file */
if (c->role->update_filename) {
error_setg(errp, "No medium inserted");
return -ENOMEDIUM;
}
+ if (offset < 0) {
+ error_setg(errp, "Image size cannot be negative");
+ return -EINVAL;
+ }
+
if (!drv->bdrv_truncate) {
if (bs->file && drv->is_filter) {
return bdrv_truncate(bs->file, offset, prealloc, errp);
continue;
}
- qobject_incref(qdict_entry_value(entry));
- qdict_put_obj(d, qdict_entry_key(entry), qdict_entry_value(entry));
+ qdict_put_obj(d, qdict_entry_key(entry),
+ qobject_ref(qdict_entry_value(entry)));
found_any = true;
}
* information before refreshing it */
bs->exact_filename[0] = '\0';
if (bs->full_open_options) {
- QDECREF(bs->full_open_options);
+ qobject_unref(bs->full_open_options);
bs->full_open_options = NULL;
}
opts = qdict_new();
append_open_options(opts, bs);
drv->bdrv_refresh_filename(bs, opts);
- QDECREF(opts);
+ qobject_unref(opts);
} else if (bs->file) {
/* Try to reconstruct valid information from the underlying file */
bool has_open_options;
bs->exact_filename[0] = '\0';
if (bs->full_open_options) {
- QDECREF(bs->full_open_options);
+ qobject_unref(bs->full_open_options);
bs->full_open_options = NULL;
}
* suffices without querying the (exact_)filename of this BDS. */
if (bs->file->bs->full_open_options) {
qdict_put_str(opts, "driver", drv->format_name);
- QINCREF(bs->file->bs->full_open_options);
- qdict_put(opts, "file", bs->file->bs->full_open_options);
+ qdict_put(opts, "file",
+ qobject_ref(bs->file->bs->full_open_options));
bs->full_open_options = opts;
} else {
- QDECREF(opts);
+ qobject_unref(opts);
}
} else if (!bs->full_open_options && qdict_size(bs->options)) {
/* There is no underlying file BDS (at least referenced by BDS.file),
QString *json = qobject_to_json(QOBJECT(bs->full_open_options));
snprintf(bs->filename, sizeof(bs->filename), "json:%s",
qstring_get_str(json));
- QDECREF(json);
+ qobject_unref(json);
}
}
projects / qemu.git / blobdiff