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Reported by Coverity.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Let management know if there were any problems communicating with
qemu-pr-helper. The event is edge-triggered, and is sent every time
the connection status of the pr-manager-helper object changes.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This command lets you query the connection status of each pr-manager-helper
object.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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When writing to the qemu-pr-helper socket failed, the persistent
reservation manager was correctly disconnecting the socket, but it
did not clear pr_mgr->ioc. So the rest of the code did not know
that the socket had been disconnected, accessed pr_mgr->ioc and
happily caused a crash.
To reproduce, it is enough to stop qemu-pr-helper between QEMU
startup and executing e.g. sg_persist -k /dev/sdb.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This adds a concrete subclass of pr-manager that talks to qemu-pr-helper.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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