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From a6912230c999761dd5a5e23f1bdec8ae00255760 Mon Sep 17 00:00:00 2001
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Message-Id: <a6912230c999761dd5a5e23f1bdec8ae00255760@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Wed, 4 Jul 2018 14:51:17 +0200
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Subject: [PATCH] qemuDomainNestedJobAllowed: Allow QEMU_JOB_NONE
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https://bugzilla.redhat.com/show_bug.cgi?id=1598084
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When creating a snapshot with --quiesce an async job is grabbed
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and just before executing guest fs-freeze command an agent job is
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grabbed. This is achieved by calling
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qemuDomainObjBeginJobInternal(job = QEMU_JOB_NONE,
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agentJob = QEMU_AGENT_JOB_MODIFY);
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Since there already is an async job set on the domain (by the
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same thread) qemuDomainNestedJobAllowed(priv, job) is consulted
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if @job is allowed by job mask. But this function returns false
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(meaning sync @job is not allowed) which leads to a deadlock.
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from commit 2647a363676833371ba400374ecfa51c84fec5c0)
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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src/qemu/qemu_domain.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
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index 3f3bb94685..fa952f8306 100644
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--- a/src/qemu/qemu_domain.c
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+++ b/src/qemu/qemu_domain.c
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@@ -6386,7 +6386,9 @@ qemuDomainObjReleaseAsyncJob(virDomainObjPtr obj)
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static bool
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qemuDomainNestedJobAllowed(qemuDomainObjPrivatePtr priv, qemuDomainJob job)
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{
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- return !priv->job.asyncJob || (priv->job.mask & JOB_MASK(job)) != 0;
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+ return !priv->job.asyncJob ||
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+ job == QEMU_JOB_NONE ||
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+ (priv->job.mask & JOB_MASK(job)) != 0;
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}
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bool
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--
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2.18.0
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