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blockdev-backup: add bitmap argument 

It is only an oversight that we don't allow incremental backup with
blockdev-backup. Add the bitmap argument which enables this.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20180830211605.13683-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
John Snow 2018-10-29 16:23:14 -04:00
parent 62b658db1d
commit 945c1ee0cb
2 changed files with 23 additions and 2 deletions
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18
blockdev.c
View File

@ -3545,6 +3545,7 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
BlockDriverState *bs;
BlockDriverState *target_bs;
Error *local_err = NULL;
BdrvDirtyBitmap *bmap = NULL;
AioContext *aio_context;
BlockJob *job = NULL;
int job_flags = JOB_DEFAULT;
@ -3595,6 +3596,21 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
goto out;
}
}
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 out;
}
if (bdrv_dirty_bitmap_qmp_locked(bmap)) {
error_setg(errp,
"Bitmap '%s' is currently locked and cannot be used for "
"backup", backup->bitmap);
goto out;
}
}
if (!backup->auto_finalize) {
job_flags |= JOB_MANUAL_FINALIZE;
}
@ -3602,7 +3618,7 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
job_flags |= JOB_MANUAL_DISMISS;
}
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
backup->sync, NULL, backup->compress,
backup->sync, bmap, backup->compress,
backup->on_source_error, backup->on_target_error,
job_flags, NULL, NULL, txn, &local_err);
if (local_err != NULL) {

7
qapi/block-core.json
View File

@ -1316,6 +1316,10 @@
# @speed: the maximum speed, in bytes per second. The default is 0,
# for unlimited.
#
# @bitmap: the name of dirty bitmap if sync is "incremental".
# Must be present if sync is "incremental", must NOT be present
# otherwise. (Since 3.1)
#
# @compress: true to compress data, if the target format supports it.
# (default: false) (since 2.8)
#
@ -1348,7 +1352,8 @@
##
{ 'struct': 'BlockdevBackup',
'data': { '*job-id': 'str', 'device': 'str', 'target': 'str',
'sync': 'MirrorSyncMode', '*speed': 'int', '*compress': 'bool',
'sync': 'MirrorSyncMode', '*speed': 'int',
'*bitmap': 'str', '*compress': 'bool',
'*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError',
'*auto-finalize': 'bool', '*auto-dismiss': 'bool' } }