|
 |
958e1b |
From 0e7b328d0802c970f632f50d6daab0ea6d226b29 Mon Sep 17 00:00:00 2001
|
|
|
2382db |
From: Eric Blake <eblake@redhat.com>
|
|
|
2382db |
Date: Wed, 20 Aug 2014 16:40:10 +0200
|
|
|
958e1b |
Subject: [PATCH 07/11] mirror: Go through ready -> complete process for 0 len image
|
|
|
2382db |
|
|
|
2382db |
Message-id: <1408552814-23031-4-git-send-email-eblake@redhat.com>
|
|
|
2382db |
Patchwork-id: 60645
|
|
|
2382db |
O-Subject: [qemu-kvm-rhev 7.0.z PATCH 3/7] mirror: Go through ready -> complete process for 0 len image
|
|
|
958e1b |
Bugzilla: 1130603
|
|
|
2382db |
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
2382db |
RH-Acked-by: Fam Zheng <famz@redhat.com>
|
|
|
2382db |
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
2382db |
|
|
|
2382db |
From: Fam Zheng <famz@redhat.com>
|
|
|
2382db |
|
|
|
2382db |
When mirroring or active committing a zero length image, BLOCK_JOB_READY
|
|
|
2382db |
is not reported now, instead the job completes because we short circuit
|
|
|
2382db |
the mirror job loop.
|
|
|
2382db |
|
|
|
2382db |
This is inconsistent with non-zero length images, and only confuses
|
|
|
2382db |
management software.
|
|
|
2382db |
|
|
|
2382db |
Let's do the same thing when seeing a 0-length image: report ready
|
|
|
2382db |
immediately; wait for block-job-cancel or block-job-complete; clear the
|
|
|
2382db |
cancel flag as existing non-zero image synced case (cancelled after
|
|
|
2382db |
ready); then jump to the exit.
|
|
|
2382db |
|
|
|
2382db |
Reported-by: Eric Blake <eblake@redhat.com>
|
|
|
2382db |
Signed-off-by: Fam Zheng <famz@redhat.com>
|
|
|
2382db |
Reviewed-by: Eric Blake <eblake@redhat.com>
|
|
|
2382db |
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
|
|
2382db |
(cherry picked from commit 9e48b025400b2d284e17860862b0a4aa02c6032d)
|
|
|
2382db |
|
|
|
2382db |
Conflicts:
|
|
|
2382db |
block/mirror.c - no backport of qapi events
|
|
|
2382db |
|
|
|
2382db |
Signed-off-by: Eric Blake <eblake@redhat.com>
|
|
|
2382db |
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
|
2382db |
---
|
|
|
2382db |
block/mirror.c | 11 ++++++++++-
|
|
|
2382db |
1 files changed, 10 insertions(+), 1 deletions(-)
|
|
|
2382db |
|
|
|
2382db |
diff --git a/block/mirror.c b/block/mirror.c
|
|
|
2382db |
index 9b3e229..cdc0268 100644
|
|
|
2382db |
--- a/block/mirror.c
|
|
|
2382db |
+++ b/block/mirror.c
|
|
|
2382db |
@@ -306,9 +306,18 @@ static void coroutine_fn mirror_run(void *opaque)
|
|
|
2382db |
}
|
|
|
2382db |
|
|
|
2382db |
s->common.len = bdrv_getlength(bs);
|
|
|
2382db |
- if (s->common.len <= 0) {
|
|
|
2382db |
+ if (s->common.len < 0) {
|
|
|
2382db |
ret = s->common.len;
|
|
|
2382db |
goto immediate_exit;
|
|
|
2382db |
+ } else if (s->common.len == 0) {
|
|
|
2382db |
+ /* Report BLOCK_JOB_READY and wait for complete. */
|
|
|
2382db |
+ block_job_ready(&s->common);
|
|
|
2382db |
+ s->synced = true;
|
|
|
2382db |
+ while (!block_job_is_cancelled(&s->common) && !s->should_complete) {
|
|
|
2382db |
+ block_job_yield(&s->common);
|
|
|
2382db |
+ }
|
|
|
2382db |
+ s->common.cancelled = false;
|
|
|
2382db |
+ goto immediate_exit;
|
|
|
2382db |
}
|
|
|
2382db |
|
|
|
2382db |
length = (bdrv_getlength(bs) + s->granularity - 1) / s->granularity;
|
|
|
2382db |
--
|
|
|
2382db |
1.7.1
|
|
|
2382db |
|