block: Simplify drive-mirror
Now that we can support boxed commands, use it to greatly
reduce the number of parameters (and likelihood of getting
out of sync) when adjusting drive-mirror parameters.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-Id: <1468535878-3760-1-git-send-email-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/blockdev.c b/blockdev.c
index c5443c1..eafeba9 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -3466,19 +3466,7 @@
block_job_cb, bs, errp);
}
-void qmp_drive_mirror(bool has_job_id, const char *job_id, const char *device,
- const char *target, bool has_format, const char *format,
- bool has_node_name, const char *node_name,
- bool has_replaces, const char *replaces,
- enum MirrorSyncMode sync,
- bool has_mode, enum NewImageMode mode,
- bool has_speed, int64_t speed,
- bool has_granularity, uint32_t granularity,
- bool has_buf_size, int64_t buf_size,
- bool has_on_source_error, BlockdevOnError on_source_error,
- bool has_on_target_error, BlockdevOnError on_target_error,
- bool has_unmap, bool unmap,
- Error **errp)
+void qmp_drive_mirror(DriveMirror *arg, Error **errp)
{
BlockDriverState *bs;
BlockBackend *blk;
@@ -3489,11 +3477,12 @@
QDict *options = NULL;
int flags;
int64_t size;
+ const char *format = arg->format;
- blk = blk_by_name(device);
+ blk = blk_by_name(arg->device);
if (!blk) {
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
- "Device '%s' not found", device);
+ "Device '%s' not found", arg->device);
return;
}
@@ -3501,24 +3490,25 @@
aio_context_acquire(aio_context);
if (!blk_is_available(blk)) {
- error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
+ error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, arg->device);
goto out;
}
bs = blk_bs(blk);
- if (!has_mode) {
- mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
+ if (!arg->has_mode) {
+ arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
- if (!has_format) {
- format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
+ if (!arg->has_format) {
+ format = (arg->mode == NEW_IMAGE_MODE_EXISTING
+ ? NULL : bs->drv->format_name);
}
flags = bs->open_flags | BDRV_O_RDWR;
source = backing_bs(bs);
- if (!source && sync == MIRROR_SYNC_MODE_TOP) {
- sync = MIRROR_SYNC_MODE_FULL;
+ if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
+ arg->sync = MIRROR_SYNC_MODE_FULL;
}
- if (sync == MIRROR_SYNC_MODE_NONE) {
+ if (arg->sync == MIRROR_SYNC_MODE_NONE) {
source = bs;
}
@@ -3528,18 +3518,18 @@
goto out;
}
- if (has_replaces) {
+ if (arg->has_replaces) {
BlockDriverState *to_replace_bs;
AioContext *replace_aio_context;
int64_t replace_size;
- if (!has_node_name) {
+ if (!arg->has_node_name) {
error_setg(errp, "a node-name must be provided when replacing a"
" named node of the graph");
goto out;
}
- to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
+ to_replace_bs = check_to_replace_node(bs, arg->replaces, &local_err);
if (!to_replace_bs) {
error_propagate(errp, local_err);
@@ -3558,26 +3548,26 @@
}
}
- if (mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
+ if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
} else {
backing_mode = MIRROR_OPEN_BACKING_CHAIN;
}
- if ((sync == MIRROR_SYNC_MODE_FULL || !source)
- && mode != NEW_IMAGE_MODE_EXISTING)
+ if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
+ && arg->mode != NEW_IMAGE_MODE_EXISTING)
{
/* create new image w/o backing file */
assert(format);
- bdrv_img_create(target, format,
+ bdrv_img_create(arg->target, format,
NULL, NULL, NULL, size, flags, &local_err, false);
} else {
- switch (mode) {
+ switch (arg->mode) {
case NEW_IMAGE_MODE_EXISTING:
break;
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
/* create new image with backing file */
- bdrv_img_create(target, format,
+ bdrv_img_create(arg->target, format,
source->filename,
source->drv->format_name,
NULL, size, flags, &local_err, false);
@@ -3593,8 +3583,8 @@
}
options = qdict_new();
- if (has_node_name) {
- qdict_put(options, "node-name", qstring_from_str(node_name));
+ if (arg->has_node_name) {
+ qdict_put(options, "node-name", qstring_from_str(arg->node_name));
}
if (format) {
qdict_put(options, "driver", qstring_from_str(format));
@@ -3603,22 +3593,22 @@
/* Mirroring takes care of copy-on-write using the source's backing
* file.
*/
- target_bs = bdrv_open(target, NULL, options, flags | BDRV_O_NO_BACKING,
- errp);
+ target_bs = bdrv_open(arg->target, NULL, options,
+ flags | BDRV_O_NO_BACKING, errp);
if (!target_bs) {
goto out;
}
bdrv_set_aio_context(target_bs, aio_context);
- blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
- has_replaces, replaces, sync, backing_mode,
- has_speed, speed,
- has_granularity, granularity,
- has_buf_size, buf_size,
- has_on_source_error, on_source_error,
- has_on_target_error, on_target_error,
- has_unmap, unmap,
+ blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
+ arg->has_replaces, arg->replaces, arg->sync,
+ backing_mode, arg->has_speed, arg->speed,
+ arg->has_granularity, arg->granularity,
+ arg->has_buf_size, arg->buf_size,
+ arg->has_on_source_error, arg->on_source_error,
+ arg->has_on_target_error, arg->on_target_error,
+ arg->has_unmap, arg->unmap,
&local_err);
bdrv_unref(target_bs);
error_propagate(errp, local_err);