[Qemu-devel] [PATCH v2 0/2] Enable passing pre-opened chardev socket FDs

[Daniel P. Berrange]

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.

Changed in v2:

  - Drop 'fdset' property / address kind, and use 'fd' for both CLI and HMP
  - Add unit tests

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  |  32 +++++++--
 chardev/char.c         |   3 +
 include/qemu/sockets.h |   1 +
 io/channel-util.c      |  13 ----
 tests/test-char.c      | 173 ++++++++++++++++++++++++++++++++++++++++++++++++-
 util/qemu-sockets.c    |  55 +++++++++++++++-
 6 files changed, 252 insertions(+), 25 deletions(-)

-- 
2.14.3