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Re: ***SPAM*** Re: [PATCH v7 00/10] IPC: checkpoint/restore in userspace enhancements [message #48483] Thu, 18 October 2012 11:02
Stanislav Kinsbursky is currently offline  Stanislav Kinsbursky
Messages: 683
Registered: October 2011
Senior Member
From: *parallels.com
18.10.2012 14:41, Michael Kerrisk (man-pages) пишет:
> Stanislaw,
>
> This patch series is an API change. Could you please make sure that
> all future revisions CC linux-api@vger.kernel.org, as per
> Documentation/SubmitChecklist.
>

Yes, sure. Thanks.

> Cheers,
>
> Michael
>
>
> On Thu, Oct 18, 2012 at 12:22 PM, Stanislav Kinsbursky
> <skinsbursky@parallels.com> wrote:
>> v7:
>> 1) Added comments in places, when behiviour is not obvious.
>> 2) Compilation fixed for compat layer
>> 3) test updated to use existent header files (instead of hard-coding new
>> defines in case of absence).
>> 4) comment fixed in qlge driver
>>
>> v6:
>> 1) rebased on 3.7-rc1
>>
>> v5:
>> 1) Several define-dependent compile bugs fixed
>> 2) IPC message copy test updated
>> 3) A couple of minor fixes.
>> 4) Qlogic driver update: rename of its internal SEM_SET define into SEM_INIT
>> (compile error).
>>
>> v4:
>> 1) If MSG_COPY flag is specified, then "mtype" is not a type, but message
>> number to copy.
>> 2) MSG_SET_COPY logic for sys_msgctl() was removed.
>>
>> v3:
>> 1) Copy messages to user-space under spinlock was replaced by allocation of
>> dummy message before queue lock and then copy of desired message to the dummy
>> one instead of unlinking it from queue list.
>> I.e. the message queue copy logic was changed: messages can be retrived one by
>> one (instead of receiving of the whole list at once).
>>
>> This patch set is aimed to provide additional functionality for all IPC
>> objects,
>> which is required for migration of these objects by user-space
>> checkpoint/restore utils (CRIU).
>>
>> The main problem here was impossibility to set up object id. This patch set
>> solves the problem in two steps:
>> 1) Makes it possible to create new object (shared memory, semaphores set or
>> messages queue) with ID, equal to passed key.
>> 2) Makes it possible to change existent object key.
>>
>> Another problem was to peek messages from queues without deleting them.
>> This was achived by introducing of new MSG_COPY flag for sys_msgrcv(). If
>> MSG_COPY flag is set, then msgtyp is interpreted as message number.
>>
>> The following series implements...
>>
>> ---
>>
>> Stanislav Kinsbursky (10):
>> ipc: remove forced assignment of selected message
>> ipc: "use key as id" functionality for resource get system call introduced
>> ipc: segment key change helper introduced
>> ipc: add new SHM_SET command for sys_shmctl() call
>> ipc: add new MSG_SET command for sys_msgctl() call
>> qlge driver: rename internal SEM_SET macro to SEM_INIT
>> ipc: add new SEM_SET command for sys_semctl() call
>> IPC: message queue receive cleanup
>> IPC: message queue copy feature introduced
>> test: IPC message queue copy feture test
>>
>>
>> drivers/net/ethernet/qlogic/qlge/qlge.h | 4
>> drivers/net/ethernet/qlogic/qlge/qlge_main.c | 16 +-
>> include/linux/msg.h | 5 -
>> include/uapi/linux/ipc.h | 1
>> include/uapi/linux/msg.h | 2
>> include/uapi/linux/sem.h | 1
>> include/uapi/linux/shm.h | 1
>> ipc/compat.c | 54 +++---
>> ipc/msg.c | 117 ++++++++++---
>> ipc/msgutil.c | 38 ++++
>> ipc/sem.c | 15 +-
>> ipc/shm.c | 18 ++
>> ipc/util.c | 67 +++++++-
>> ipc/util.h | 6 +
>> security/selinux/hooks.c | 3
>> security/smack/smack_lsm.c | 3
>> tools/testing/selftests/ipc/Makefile | 25 +++
>> tools/testing/selftests/ipc/msgque.c | 231 ++++++++++++++++++++++++++
>> 18 files changed, 526 insertions(+), 81 deletions(-)
>> create mode 100644 tools/testing/selftests/ipc/Makefile
>> create mode 100644 tools/testing/selftests/ipc/msgque.c
>>
>
>
>


--
Best regards,
Stanislav Kinsbursky
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