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drive-backup: create do_backup_common 

Create a common core that comprises the actual meat of what the backup API
boundary needs to do, and then switch drive-backup to use it.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-3-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2019-07-29 16:35:52 -04:00
parent 3c95037aa8
commit 7b0b870bcc
1 changed files with 57 additions and 45 deletions
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102
blockdev.c
View File

@ -3427,20 +3427,16 @@ out:
aio_context_release(aio_context);
}
static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
Error **errp)
/* Common QMP interface for drive-backup and blockdev-backup */
static BlockJob *do_backup_common(BackupCommon *backup,
BlockDriverState *bs,
BlockDriverState *target_bs,
AioContext *aio_context,
JobTxn *txn, Error **errp)
{
BlockDriverState *bs;
BlockDriverState *target_bs;
BlockDriverState *source = NULL;
BlockJob *job = NULL;
BdrvDirtyBitmap *bmap = NULL;
AioContext *aio_context;
QDict *options = NULL;
Error *local_err = NULL;
int flags, job_flags = JOB_DEFAULT;
int64_t size;
bool set_backing_hd = false;
int job_flags = JOB_DEFAULT;
int ret;
if (!backup->has_speed) {
@ -3452,9 +3448,6 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
if (!backup->has_on_target_error) {
backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
}
if (!backup->has_mode) {
backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
if (!backup->has_job_id) {
backup->job_id = NULL;
}
@ -3468,6 +3461,54 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
backup->compress = false;
}
ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
if (ret < 0) {
return NULL;
}
if (backup->has_bitmap) {
bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
if (!bmap) {
error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
return NULL;
}
if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) {
return NULL;
}
}
if (!backup->auto_finalize) {
job_flags |= JOB_MANUAL_FINALIZE;
}
if (!backup->auto_dismiss) {
job_flags |= JOB_MANUAL_DISMISS;
}
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
backup->sync, bmap, backup->compress,
backup->on_source_error, backup->on_target_error,
job_flags, NULL, NULL, txn, errp);
return job;
}
static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
Error **errp)
{
BlockDriverState *bs;
BlockDriverState *target_bs;
BlockDriverState *source = NULL;
BlockJob *job = NULL;
AioContext *aio_context;
QDict *options = NULL;
Error *local_err = NULL;
int flags;
int64_t size;
bool set_backing_hd = false;
if (!backup->has_mode) {
backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
bs = bdrv_lookup_bs(backup->device, backup->device, errp);
if (!bs) {
return NULL;
@ -3543,12 +3584,6 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
goto out;
}
ret = bdrv_try_set_aio_context(target_bs, aio_context, errp);
if (ret < 0) {
bdrv_unref(target_bs);
goto out;
}
if (set_backing_hd) {
bdrv_set_backing_hd(target_bs, source, &local_err);
if (local_err) {
@ -3556,31 +3591,8 @@ static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
}
}
if (backup->has_bitmap) {
bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
if (!bmap) {
error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
goto unref;
}
if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) {
goto unref;
}
}
if (!backup->auto_finalize) {
job_flags |= JOB_MANUAL_FINALIZE;
}
if (!backup->auto_dismiss) {
job_flags |= JOB_MANUAL_DISMISS;
}
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
backup->sync, bmap, backup->compress,
backup->on_source_error, backup->on_target_error,
job_flags, NULL, NULL, txn, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
goto unref;
}
job = do_backup_common(qapi_DriveBackup_base(backup),
bs, target_bs, aio_context, txn, errp);
unref:
bdrv_unref(target_bs);