[Qemu-block] [PATCH v3 00/13] main-loop: Get rid of fd_read_poll and qemu_set_fd_handler2

[Fam Zheng]

v3: Replace previous 13 with a simple return type conversion patch.
    Drop RFC.

This carries out the mandate in the comment of qemu_set_fd_handler2 and removes
fd_read_poll from the code base, because it will make the work easier to
convert ppoll to epoll in main loop.  Also, the aio interface doesn't have a
read poll callback, which means this conversion woule be necessary if we want
to move iohandler fds from main loop to AioContext.

There are five users of the read poll callback now: qemu-nbd, l2tpv3, netmap,
socket and tap, which are all covered.

Patch 1 adds a stub for qemu_set_fd_handler which will be referenced in coming
patches.

Patch 2 converts qemu-nbd which compares two global numbers in the fd_read_poll
callback.

Patches 3~6 converts the four net devices, all of which checks
qemu_can_send_packet() in the callback.

Patch 7 and 8 finally removes the function.

The rest patches are cleanup for the unuseful return value of
qemu_set_fd_handler.

Please review!



Fam Zheng (13):
  stubs: Add qemu_set_fd_handler
  qemu-nbd: Switch to qemu_set_fd_handler
  l2tpv3: Drop l2tpv3_can_send
  netmap: Drop netmap_can_send
  net/socket: Drop net_socket_can_send
  tap: Drop tap_can_send
  Change qemu_set_fd_handler2(..., NULL, ...) to qemu_set_fd_handler
  main-loop: Drop qemu_set_fd_handler2
  alsaaudio: Remove unused error handling of qemu_set_fd_handler
  oss: Remove unused error handling of qemu_set_fd_handler
  xen_backend: Remove unused error handling of qemu_set_fd_handler
  event-notifier: Always return 0 for posix implementation
  iohandler: Change return type of qemu_set_fd_handler to "void"

 audio/alsaaudio.c           | 16 ++-----------
 audio/ossaudio.c            | 14 ++++++-----
 blockdev-nbd.c              |  4 ++--
 hw/xen/xen_backend.c        |  4 +---
 include/block/aio.h         |  2 +-
 include/qemu/main-loop.h    | 57 ++++-----------------------------------------
 iohandler.c                 | 21 ++---------------
 main-loop.c                 |  3 +--
 migration/exec.c            |  6 ++---
 migration/fd.c              |  4 ++--
 migration/rdma.c            |  7 +++---
 migration/tcp.c             |  6 ++---
 migration/unix.c            |  6 ++---
 net/l2tpv3.c                | 17 ++++----------
 net/netmap.c                | 20 ++++------------
 net/socket.c                | 37 +++++++++++++++++------------
 net/tap.c                   | 28 +++++++++++-----------
 qemu-nbd.c                  | 21 +++++++++++++----
 stubs/set-fd-handler.c      |  3 +--
 ui/vnc-auth-sasl.c          |  2 +-
 ui/vnc-auth-vencrypt.c      |  2 +-
 ui/vnc-ws.c                 |  6 ++---
 ui/vnc.c                    | 27 ++++++++++-----------
 util/event_notifier-posix.c |  3 ++-
 util/qemu-sockets.c         |  8 +++----
 25 files changed, 120 insertions(+), 204 deletions(-)

-- 
2.4.1