IFF_VNET_HDR is a tun/tap flag that allows you to send and receive
large (i.e. GSO) packets and packets with partial checksums. Setting
the flag means that every packet is proceeded by the same header which
virtio uses to communicate GSO/csum metadata.
By enabling this flag on the tap fds we create, we greatly increase
the achievable throughput with virtio_net.
However, we need to be careful to only set the flag when a) QEMU has
support for this ABI and b) the value of the flag is queryable using
the TUNGETIFF ioctl.
It's nearly five months since kvm-74 - the first KVM release with this
feature - was released. Up until now, we've not added libvirt support
because there is no clean way to detect support for this in QEMU at
runtime. A brief attempt to add a "info capabilities" monitor command
to QEMU floundered. Perfect is the enemy of good enough. Probing the
KVM version will suffice for now.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
* qemud/remote.c qemud/remote_dispatch_localvars.h
qemud/remote_dispatch_proc_switch.h qemud/remote_dispatch_prototypes.h
qemud/remote_protocol.c qemud/remote_protocol.h
qemud/remote_protocol.x src/driver.h src/libvirt.c
src/libvirt_internal.h src/libvirt_sym.version src/lxc_driver.c
src/openvz_driver.c src/qemu_conf.h src/qemu_driver.c
src/remote_internal.c src/test.c src/virsh.c: large patch to
add migration support for KVM/QEmu, based on the work of Rich Jones
and Chris Lalancette. This introduce a new version of the prepare
and finish steps of the migration, so changes the driver API and
a lot of code.
Daniel
* include/libvirt/libvirt.h include/libvirt/libvirt.h.in
src/libvirt.c src/libvirt_sym.version: new libvirt event entry
points, big patch provided by Ben Guthro
* Makefile.am configure.in src/driver.h src/event.c src/event.h
src/internal.h src/libvirt.c src/libvirt_sym.version src/lxc_driver.c
src/openvz_driver.c src/qemu_conf.h src/qemu_driver.c
src/remote_internal.c src/storage_backend_fs.c src/test.c
qemud/event.c qemud/event.h qemud/mdns.c qemud/qemud.c
qemud/qemud.h qemud/remote.c qemud/remote_dispatch_localvars.h
qemud/remote_dispatch_proc_switch.h qemud/remote_dispatch_prototypes.h
qemud/remote_protocol.c qemud/remote_protocol.h
qemud/remote_protocol.x proxy/Makefile.am python/generator.py:
Not much is left untouched by the patch adding the events support
* docs/libvirt-api.xml docs/libvirt-refs.xml
docs/html/libvirt-libvirt.html: regenerated the docs
* examples/domain-events/events-c/Makefile.am
examples/domain-events/events-c/event-test.c: a test example
* AUTHORS: added Ben Guthro
daniel
Use <config.h>, not "config.h", per autoconf documentation.
* Makefile.cfg (local-checks-to-skip) [sc_require_config_h]: Enable.
* .x-sc_require_config_h: New file, to list exempted files.
* Makefile.am (EXTRA_DIST): Add .x-sc_require_config_h.
* src/qemu_conf.c: Add "static" and "const" attributes to some globals.
* src/qemu_conf.h: Update a declaration.
* src/qemu_driver.c (qemud_driver): Declare static.
Author: Jim Meyering <meyering@redhat.com>
