[CRIU] [PATCH v4 00/33] Rework file opening scheme to make it asynchronous

[Kirill Tkhai]

Hi,

this is v4 iteration of the patchset. There are changes in:

1)"[25/33]files: Make recv_fd_from_peer() non-block"

  Fixed new_fd assignment error. Found by wathing.

2)"[26/33]files: Kill struct file_desc_ops::post_open"

  Fixed a couple of errors found by unix exhaustive test and watching.

3)[27-33,33] are new patches, which implement merging fds,
  tty and eventpoll lists together. Mostly they are refactorings.

---

Kirill Tkhai (33):
      pstree: Add task_st futex
      files: Send/receive fds with pointers on their struct fdinfo_list_entry in receiver
      files: Move closing fle's transport_fd to recv_fd_from_peer()
      files: Move derefferencing of TRANSPORT_FD_OFF to send_fd_to_peer()
      files: Add fle_init() for initialization new fdinfo_list_entry
      files: Allow to receive further fds
      files: Make sending fds to peers async
      files: Receive real fd numbers using recv_fd_from_peer()
      files: Kill file_desc_ops::want_transport()
      files: Kill fd parameter of transport_name_gen()
      files: Kill want_post_open_stage()
      files: Kill fd_open_state::receive_fd stage
      files: Merge states iteration into open_fdinfos()
      files: Implement {set,wait}_fds_event()
      files: Add fdinfo_list_entry::stage
      unix: Link connected to peer sockets to its list
      unix: Wait a peer using task_st futex
      inet: Link sockets in port_type list
      inet: Use task_st futex for notification instead of per-port
      timerfd: Kill post_open stage
      files: Add open stages enum
      eventpoll: Make post_open stage may fail
      files: Set fds event after sending fd to peer
      files: Add new_fd parameter to file_desc_ops::open()
      files: Make recv_fd_from_peer() non-block
      files: Kill struct file_desc_ops::post_open
      tty: Set dependencies between masters, slaves and ctty
      files: Move ctty fixup to open_fd()
      tty: Use generic list for tty files
      eventpoll: Use generic list for eventpoll files
      files: Kill pid parameter of open_fdinfos()
      files: Merge collect_gen_fd() and collect_used_fd(), and call it unconditionally
      tty: Optimize dependencies check


 criu/autofs.c           |   30 ++-
 criu/eventfd.c          |    5 -
 criu/eventpoll.c        |   48 ++++-
 criu/fifo.c             |   10 +
 criu/files-ext.c        |    5 -
 criu/files-reg.c        |   12 +
 criu/files.c            |  423 +++++++++++++++++++++--------------------------
 criu/fsnotify.c         |   10 +
 criu/include/files.h    |   48 +++--
 criu/include/pipes.h    |    1 
 criu/include/pstree.h   |    7 +
 criu/include/rst_info.h |    3 
 criu/include/sk-inet.h  |    1 
 criu/include/tty.h      |    2 
 criu/namespaces.c       |    5 -
 criu/pipes.c            |   46 ++---
 criu/pstree.c           |    1 
 criu/signalfd.c         |    5 -
 criu/sk-inet.c          |   53 ++++--
 criu/sk-netlink.c       |    5 -
 criu/sk-packet.c        |    5 -
 criu/sk-unix.c          |  125 ++++++++------
 criu/timerfd.c          |   25 +--
 criu/tty.c              |  111 +++++++-----
 criu/tun.c              |    9 +
 include/common/lock.h   |    5 +
 26 files changed, 532 insertions(+), 468 deletions(-)

--
Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>