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From cf8fcc97c173618534874046d2f29d4135cf2441 Mon Sep 17 00:00:00 2001
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Message-Id: <cf8fcc97c173618534874046d2f29d4135cf2441@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Fri, 8 Dec 2017 10:27:03 +0100
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Subject: [PATCH] qemu: blockjob: Reset disk source index after pivot
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Since we are re-detecting the backing chain after pivoting to the active
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block commit target (or block copy target) the disk index needs to be
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reset to 0. This is necessary since we move a member of the backing
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chain to disk->src but clear indexes only starting from
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disk->src->backingStore. The freshly detected images have indexes
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starting from 1, but since we've pivoted into an image which was
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previously a backing store it would have a non-0 index.
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The lookup function would then return the top of the chain for queries
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like 'vda[1]' instead of the first backing store.
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This problem will not be present once we keep the disk indexes stable.
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1519745
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(cherry picked from commit fac8724ceb371f962d5d185c639456a34d71659e)
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/qemu/qemu_blockjob.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/qemu/qemu_blockjob.c b/src/qemu/qemu_blockjob.c
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index c1b46f7d0a..afc05f161c 100644
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--- a/src/qemu/qemu_blockjob.c
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+++ b/src/qemu/qemu_blockjob.c
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@@ -165,6 +165,7 @@ qemuBlockJobEventProcess(virQEMUDriverPtr driver,
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disk->mirror = NULL;
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disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE;
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disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_UNKNOWN;
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+ disk->src->id = 0;
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ignore_value(qemuDomainDetermineDiskChain(driver, vm, disk,
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true, true));
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ignore_value(qemuBlockNodeNamesDetect(driver, vm, asyncJob));
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--
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2.15.1
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