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block: simplify blockdev-backup 

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 blockdev-backup parameters.

Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Jeff Cody <jcody@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
CC: Eric Blake <eblake@redhat.com>
CC: John Snow <jsnow@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Pavel Butsykin 2016-07-22 11:17:51 +03:00 committed by Kevin Wolf
parent 81206a8987
commit dc7a4a9ed1
2 changed files with 25 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
blockdev.c
View File

@ -1902,14 +1902,8 @@ typedef struct BlockdevBackupState {
AioContext *aio_context;
} BlockdevBackupState;
static void do_blockdev_backup(const char *job_id, const char *device,
const char *target, enum MirrorSyncMode sync,
bool has_speed, int64_t speed,
bool has_on_source_error,
BlockdevOnError on_source_error,
bool has_on_target_error,
BlockdevOnError on_target_error,
BlockJobTxn *txn, Error **errp);
static void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
Error **errp);
static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
{
@ -1942,12 +1936,7 @@ static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
state->bs = bs;
bdrv_drained_begin(state->bs);
do_blockdev_backup(backup->has_job_id ? backup->job_id : NULL,
backup->device, backup->target, backup->sync,
backup->has_speed, backup->speed,
backup->has_on_source_error, backup->on_source_error,
backup->has_on_target_error, backup->on_target_error,
common->block_job_txn, &local_err);
do_blockdev_backup(backup, common->block_job_txn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
@ -3243,31 +3232,27 @@ BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
return bdrv_named_nodes_list(errp);
}
void do_blockdev_backup(const char *job_id, const char *device,
const char *target, enum MirrorSyncMode sync,
bool has_speed, int64_t speed,
bool has_on_source_error,
BlockdevOnError on_source_error,
bool has_on_target_error,
BlockdevOnError on_target_error,
BlockJobTxn *txn, Error **errp)
void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn, Error **errp)
{
BlockDriverState *bs;
BlockDriverState *target_bs;
Error *local_err = NULL;
AioContext *aio_context;
if (!has_speed) {
speed = 0;
if (!backup->has_speed) {
backup->speed = 0;
}
if (!has_on_source_error) {
on_source_error = BLOCKDEV_ON_ERROR_REPORT;
if (!backup->has_on_source_error) {
backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
}
if (!has_on_target_error) {
on_target_error = BLOCKDEV_ON_ERROR_REPORT;
if (!backup->has_on_target_error) {
backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
}
if (!backup->has_job_id) {
backup->job_id = NULL;
}
bs = qmp_get_root_bs(device, errp);
bs = qmp_get_root_bs(backup->device, errp);
if (!bs) {
return;
}
@ -3275,7 +3260,7 @@ void do_blockdev_backup(const char *job_id, const char *device,
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
target_bs = bdrv_lookup_bs(target, target, errp);
target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
if (!target_bs) {
goto out;
}
@ -3291,8 +3276,9 @@ void do_blockdev_backup(const char *job_id, const char *device,
goto out;
}
}
backup_start(job_id, bs, target_bs, speed, sync, NULL, on_source_error,
on_target_error, block_job_cb, bs, txn, &local_err);
backup_start(backup->job_id, bs, target_bs, backup->speed, backup->sync,
NULL, backup->on_source_error, backup->on_target_error,
block_job_cb, bs, txn, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
}
@ -3300,21 +3286,9 @@ out:
aio_context_release(aio_context);
}
void qmp_blockdev_backup(bool has_job_id, const char *job_id,
const char *device, const char *target,
enum MirrorSyncMode sync,
bool has_speed, int64_t speed,
bool has_on_source_error,
BlockdevOnError on_source_error,
bool has_on_target_error,
BlockdevOnError on_target_error,
Error **errp)
void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
{
do_blockdev_backup(has_job_id ? job_id : NULL, device, target,
sync, has_speed, speed,
has_on_source_error, on_source_error,
has_on_target_error, on_target_error,
NULL, errp);
do_blockdev_backup(arg, NULL, errp);
}
/* Parameter check and block job starting for drive mirroring.

6
qapi/block-core.json
View File

@ -1105,9 +1105,13 @@
#
# For the arguments, see the documentation of BlockdevBackup.
#
# Returns: nothing on success
# If @device is not a valid block device, DeviceNotFound
#
# Since 2.3
##
{ 'command': 'blockdev-backup', 'data': 'BlockdevBackup' }
{ 'command': 'blockdev-backup', 'boxed': true,
'data': 'BlockdevBackup' }
##