Use the probing functionality added in the last patch to turn on
a capability bit when active commit is present, and gate active
commit on that capability.
For my own reference: the difference between BLOCKJOB_SYNC and
BLOCKJOB_ASYNC is whether qemu generated an event at the
conclusion of blockpull; basically, RHEL 6.2 was the only release
of qemu that has the sync semantics and lacks the event. RHEL
6.3 added blockcopy, but also picked up on the upstream style
of qemu generating events. As no one is likely to backport
active commit to RHEL 6.2, it's safe for blockcommit to always
require async blockjob support.
Modifying qemucapabilitiestest is painful; the .replies files would
be so much easier if they had comments correlating which command
generated the given reply. Maybe I'll fix that up later...
* src/qemu/qemu_capabilities.h (QEMU_CAPS_ACTIVE_COMMIT): New
capability.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit): Use the new bit
* src/qemu/qemu_capabilities.c (virQEMUCaps): Name the new bit.
(virQEMUCapsProbeQMPCommands): Set it.
* tests/qemucapabilitiesdata/caps_1.3.1-1.replies: Update.
* tests/qemucapabilitiesdata/caps_1.4.2-1.replies: Likewise.
* tests/qemucapabilitiesdata/caps_1.5.3-1.replies: Likewise.
* tests/qemucapabilitiesdata/caps_1.6.0-1.replies: Likewise.
* tests/qemucapabilitiesdata/caps_1.6.50-1.replies: Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
This test is there to ensure that our capabilities detection code isn't
broken somehow.
How to gather test data:
Firstly, the data is split into two separate files. The former (with
suffix .replies) contains all the qemu replies. This is very fragile as
introducing a new device can mean yet another monitor command and hence
edit of this file in the future. But there's no better way of doing
this. To get this data simply turn on debug logs and copy all the
QEMU_MONITOR_IO_PROCESS lines. But be careful to not copy incomplete
ones (yeah, we report some incomplete lines too). Long story short, at
the libvirtd startup, a dummy qemu is spawn to get all the capabilities.
The latter (with suffix .caps) contains capabilities XML. Just start a
domain and copy the corresponding part from its state XML file.
Including <qemuCaps> tag.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
