Re: [PATCH 09/12] qemu: complete vhostuser + passt support

<interface type='vhostuser'><backend type='passt'/> needs to run the passt command just as is done for interface type='user', but then add vhostuser bits to the qemu commandline/monitor command. There are some changes to the parsing/validation along with changes to the vhostuser codepath do do the extra stuff for passt. I tried keeping them separated into different patches, but then the unit test failed in a strange way deep down in the bowels of the commandline generation, so this patch both 1) makes the final changes to parsing/formatting and 2) adds passt stuff at appropriate places for vhostuser (as well as making a couple of things *not* happen when the passt backend is chosen). The result is that you can now have: <interface type='vhostuser'> <backend type='passt'/> ... </interface> Then as long as you also have the following as a subelement of <domain>: <memoryBacking> <access mode='shared'/> </memoryBacking> your passt interfaces will benefit from the greatly improved efficiency of a vhost-user data path, and all without requiring special privileges or capabilities *anywhere* (i.e. it works for unprivileged libvirt (qemu:///session) as well as privileged libvirt). Signed-off-by: Laine Stump <laine(a)redhat.com&gt; --- src/conf/domain_conf.c | 36 ++++++--- src/conf/domain_validate.c | 77 +++++++------------ src/conf/schemas/domaincommon.rng | 32 +++++++- src/qemu/qemu_command.c | 7 +- src/qemu/qemu_extdevice.c | 6 +- src/qemu/qemu_hotplug.c | 21 ++++- src/qemu/qemu_passt.c | 3 + src/qemu/qemu_process.c | 15 +++- src/qemu/qemu_validate.c | 7 +- ...t-user-slirp-portforward.x86_64-latest.err | 2 +- .../net-vhostuser-passt.x86_64-latest.args | 42 ++++++++++ .../net-vhostuser-passt.x86_64-latest.xml | 72 +++++++++++++++++ tests/qemuxmlconfdata/net-vhostuser-passt.xml | 70 +++++++++++++++++ tests/qemuxmlconftest.c | 1 + 14 files changed, 317 insertions(+), 74 deletions(-) create mode 100644 tests/qemuxmlconfdata/net-vhostuser-passt.x86_64-latest.args create mode 100644 tests/qemuxmlconfdata/net-vhostuser-passt.x86_64-latest.xml create mode 100644 tests/qemuxmlconfdata/net-vhostuser-passt.xml