This fixes a long standing problem that libvirt has with starting up QEMU. We have to busy-wait retrying connect() on the QMP monitor socket until QEMU finally creates & listens on it, but at same time must be careful to not wait forever if QEMU exits.
This this patch series, libvirt can simply pass in a pre-opened UNIX domain socket file descriptor, which it can immediately connect to with no busy-wait. Daniel P. Berrange (2): io: move fd_is_socket() into common sockets code char: allow passing pre-opened socket file descriptor at startup chardev/char-socket.c | 66 ++++++++++++++++++++++++++++++++++++++++++++------ chardev/char.c | 6 +++++ include/qemu/sockets.h | 1 + io/channel-util.c | 13 ---------- monitor.c | 5 ++++ qapi/common.json | 11 +++++++++ qapi/sockets.json | 14 ++++++++--- util/qemu-sockets.c | 49 +++++++++++++++++++++++++++++++++++++ 8 files changed, 142 insertions(+), 23 deletions(-) -- 2.14.3
