diff options
| author | Max Reitz <mreitz@redhat.com> | 2014-10-27 11:12:50 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-11-03 11:41:48 +0000 |
| commit | 77485434206bbbfbb7f6a446866f6a327b062d5e (patch) | |
| tree | d899b92276dd04c297aad774d923ae61e0691fb4 /block | |
| parent | 9ea92c210675b0d2b0ff3ccd2f7a360d1f6c5129 (diff) | |
block: Add status callback to bdrv_amend_options()
Depending on the changed options and the image format,
bdrv_amend_options() may take a significant amount of time. In these
cases, a way to be informed about the operation's status is desirable.
Since the operation is rather complex and may fundamentally change the
image, implementing it as AIO or a coroutine does not seem feasible. On
the other hand, implementing it as a block job would be significantly
more difficult than a simple callback and would not add benefits other
than progress report to the amending operation, because it should not
actually be run as a block job at all.
A callback may not be very pretty, but it's very easy to implement and
perfectly fits its purpose here.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoît Canet <benoit.canet@nodalink.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1414404776-4919-2-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 7ec7830fac..02427936c9 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2613,7 +2613,8 @@ static int qcow2_downgrade(BlockDriverState *bs, int target_version) return 0; } -static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts) +static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts, + BlockDriverAmendStatusCB *status_cb) { BDRVQcowState *s = bs->opaque; int old_version = s->qcow_version, new_version = old_version; |