[libvirt] [PATCH 0/9] Implement keepalive protocol for libvirt RPC

This allows us to detect broken connections between server and client without waiting for TCP timeout and dead deamon/client. By default a connection is considered broken after about 30 seconds of no messages received from remote party. After that period, the connection is automatically closed. The main reason for implementing this is that peer-to-peer migration can now be canceled when a connection between source and target breaks. Although this will really work only after qemu fixes migrate_cancel command so that it doesn't block when outgoing TCP buffers are full. Jiri Denemark (9): Define keepalive protocol Implement common keepalive handling Introduce two public APIs for keepalive protocol Implement keepalive protocol in libvirt daemon Add support for non-blocking calls in client RPC Add support for async close of client RPC socket Implement keepalive protocol in remote driver Add keepalive support into domain-events examples qemu: Add support for keepalive messages during p2p migration .gitignore | 1 + daemon/libvirtd.aug | 4 + daemon/libvirtd.c | 11 + daemon/libvirtd.conf | 15 + daemon/remote.c | 38 ++ examples/domain-events/events-c/event-test.c | 11 + examples/domain-events/events-python/event-test.py | 3 + include/libvirt/libvirt.h.in | 5 + po/POTFILES.in | 1 + src/Makefile.am | 13 +- src/driver.h | 9 + src/libvirt.c | 107 +++++ src/libvirt_internal.h | 10 +- src/libvirt_public.syms | 6 + src/qemu/libvirtd_qemu.aug | 2 + src/qemu/qemu.conf | 16 + src/qemu/qemu_conf.c | 11 + src/qemu/qemu_conf.h | 3 + src/qemu/qemu_migration.c | 10 + src/qemu/test_libvirtd_qemu.aug | 6 + src/remote/remote_driver.c | 30 ++ src/remote/remote_protocol.x | 2 +- src/rpc/virkeepalive.c | 464 ++++++++++++++++++++ src/rpc/virkeepalive.h | 58 +++ src/rpc/virkeepaliveprotocol.x | 8 + src/rpc/virnetclient.c | 321 ++++++++++++-- src/rpc/virnetclient.h | 5 + src/rpc/virnetserver.c | 10 + src/rpc/virnetserver.h | 2 + src/rpc/virnetserverclient.c | 126 +++++- src/rpc/virnetserverclient.h | 6 + 31 files changed, 1254 insertions(+), 60 deletions(-) create mode 100644 src/rpc/virkeepalive.c create mode 100644 src/rpc/virkeepalive.h create mode 100644 src/rpc/virkeepaliveprotocol.x -- 1.7.6.1