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

[Pavel Emelyanov]

On 12/13/2016 06:04 PM, Kirill Tkhai wrote:
> 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.

What the error was?

> 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>
> .
>