[CRIU] [PATCH 00/12] Support for packet's msg_name in receive queue of promiscous DGRAM sockets

[Kirill Tkhai]

On 29.04.2016 20:44, Andrew Vagin wrote:
> On Fri, Apr 29, 2016 at 06:54:59PM +0300, Kirill Tkhai wrote:
>> On 29.04.2016 18:13, Andrew Vagin wrote:
>>> https://travis-ci.org/criupatchwork/criu/builds/126673004
>>
>> What this repository about? Is there patches which will definitely go to criu mainstream?
> 
> This repo is github.com/xemul/criu/criu-dev + your patches.

kirill at pro:~/criu$ git branch
* criu-dev
  master
  master.stgit
kirill at pro:~/criu$ git pull
Already up-to-date.
kirill at pro:~/criu$ git remote -v
origin	https://github.com/xemul/criu.git (fetch)
origin	https://github.com/xemul/criu.git (push)
kirill at pro:~/criu$ git log -G  "get_unused_fd" -p
kirill at pro:~/criu$

No, it's not criu-dev. There are still no these patches.

>>
>>> On Fri, Apr 29, 2016 at 05:34:52PM +0300, Kirill Tkhai wrote:
>>>> DGRAM packet, received using recvmsg, have msghdr populated:
>>>>
>>>> recvmsg(int sockfd, struct msghdr *msg, int flags)
>>>>
>>>> struct msghdr {
>>>> 	void		*msg_name;
>>>> 	int		msg_namelen;
>>>> 	...
>>>> };
>>>>
>>>> msg_name and msg_namelen contain the name of the sender of packet,
>>>> which it's bound to.
>>>>
>>>> Currently, we do not support this. We restore the whole queue with
>>>> the only sender (the receiver is peer for it, but there may be several
>>>> senders), or with empty sender.
>>>>
>>>> This series add a support for "promiscous" receive queues and restore
>>>> them correct.
>>>>
>>>> To do that, we determine sockets, which queue has several senders, and
>>>> senders, who are involved it there. Sender's fds are sent to receives,
>>>> and receivers restore their queues it correct order and with correct
>>>> msg_names.
>>>>
>>>> This patchset should have a sequel, which introduces "ghost sockets",
>>>> that are not supported there. Their packets are restored as having
>>>> noname senders now.
>>>>
>>>> ---
>>>>
>>>> Kirill Tkhai (12):
>>>>       unix: Link all sockets in unix_sockets list
>>>>       unix: Add find_unix_sk_by_name()
>>>>       unix: Add sender_ino of packets and socket
>>>>       sk-queue: Allow to dump a skb sender
>>>>       unix: Dump DGRAM packets and sockets senders
>>>>       unix: Fixup queuer of promiscuous DGRAM receivers
>>>>       unix: Resolve senders of packets in receive queue of DGRAM socket
>>>>       files: Add file_desc_ops::receive method
>>>>       files: Add get_unused_fd() helper
>>>>       unix: Send senders fds of packets in receive queue to receiver
>>>>       sk-queue: Allow to use several file descriptors to restore a queue
>>>>       unix: Add a method for choosing sender of packet in promiscous DGRAM queue
>>>>
>>>>
>>>>  criu/cr-restore.c       |    2 
>>>>  criu/files.c            |  102 +++++++++++++++
>>>>  criu/include/files.h    |   12 ++
>>>>  criu/include/image.h    |    2 
>>>>  criu/include/pstree.h   |    1 
>>>>  criu/include/sk-queue.h |   15 ++
>>>>  criu/sk-queue.c         |  146 ++++++++++++++++++++-
>>>>  criu/sk-unix.c          |  322 ++++++++++++++++++++++++++++++++++++++++++++---
>>>>  images/sk-packet.proto  |    1 
>>>>  images/sk-unix.proto    |    2 
>>>>  10 files changed, 567 insertions(+), 38 deletions(-)
>>>>
>>>> --
>>>> Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
>>>> _______________________________________________
>>>> CRIU mailing list
>>>> CRIU at openvz.org
>>>> https://lists.openvz.org/mailman/listinfo/criu