From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758639Ab2JXPfy (ORCPT ); Wed, 24 Oct 2012 11:35:54 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:16561 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758577Ab2JXPfv (ORCPT ); Wed, 24 Oct 2012 11:35:51 -0400 Subject: [RFC PATCH v8 0/5] IPC: checkpoint/restore in userspace enhancements To: akpm@linux-foundation.org From: Stanislav Kinsbursky Cc: serge.hallyn@canonical.com, ebiederm@xmission.com, linux-kernel@vger.kernel.org, xemul@parallels.com, catalin.marinas@arm.com, will.deacon@arm.com, jmorris@namei.org, cmetcalf@tilera.com, joe.korty@ccur.com, dhowells@redhat.com, dledford@redhat.com, viro@zeniv.linux.org.uk, kosaki.motohiro@jp.fujitsu.com, linux-api@vger.kernel.org, serue@us.ibm.com, tglx@linutronix.de, paulmck@linux.vnet.ibm.com, devel@openvz.org, mtk.manpages@gmail.com Date: Wed, 24 Oct 2012 19:34:51 +0400 Message-ID: <20121024151555.5642.79086.stgit@localhost.localdomain> User-Agent: StGit/0.16 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v8: This respin of the patch set was significantly reworked. Most part of new API was replaced by sysctls (by one per messages, semaphores and shared memory), allowing to preset desired id for next new IPC object. 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 by adding new sysctls for preset of desired id for new IPC object. 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 (5): ipc: remove forced assignment of selected message ipc: add sysctl to specify desired next object id ipc: message queue receive cleanup ipc: message queue copy feature introduced test: IPC message queue copy feture test include/linux/ipc_namespace.h | 1 include/linux/msg.h | 5 - include/uapi/linux/msg.h | 1 ipc/compat.c | 45 +++---- ipc/ipc_sysctl.c | 28 ++++ ipc/msg.c | 99 +++++++++++---- ipc/msgutil.c | 38 ++++++ ipc/util.c | 16 ++ ipc/util.h | 2 tools/testing/selftests/ipc/Makefile | 25 ++++ tools/testing/selftests/ipc/msgque.c | 231 ++++++++++++++++++++++++++++++++++ 11 files changed, 432 insertions(+), 59 deletions(-) create mode 100644 tools/testing/selftests/ipc/Makefile create mode 100644 tools/testing/selftests/ipc/msgque.c