Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752618AbZIGVLz (ORCPT ); Mon, 7 Sep 2009 17:11:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752012AbZIGVLy (ORCPT ); Mon, 7 Sep 2009 17:11:54 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:37297 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751589AbZIGVLy (ORCPT ); Mon, 7 Sep 2009 17:11:54 -0400 Date: Mon, 7 Sep 2009 14:16:20 -0700 From: Sukadev Bhattiprolu To: linux-kernel@vger.kernel.org Cc: serue@us.ibm.com, Oren Laadan , "Eric W. Biederman" , Alexey Dobriyan , Pavel Emelyanov , Andrew Morton , torvalds@linux-foundation.org, mikew@google.com, mingo@elte.hu, hpa@zytor.com, Containers , sukadev@us.ibm.com Subject: [RFC][v5][PATCH 7/8]: Define do_fork_with_pids() Message-ID: <20090907211620.GG6685@us.ibm.com> References: <20090907211302.GA5892@us.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090907211302.GA5892@us.ibm.com> X-Operating-System: Linux 2.0.32 on an i486 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3670 Lines: 103 Subject: [RFC][v5][PATCH 7/8]: Define do_fork_with_pids() do_fork_with_pids() is same as do_fork(), except that it takes an additional, 'pid_set', parameter. This parameter, currently unused, specifies the set of target pids of the process in each of its pid namespaces. Changelog[v4]: - Rename 'struct target_pid_set' to 'struct pid_set' since it may be useful in other contexts. Changelog[v3]: - Fix "long-line" warning from checkpatch.pl Changelog[v2]: - To facilitate moving architecture-inpdendent code to kernel/fork.c pass in 'struct target_pid_set __user *' to do_fork_with_pids() rather than 'pid_t *' (next patch moves the arch-independent code to kernel/fork.c) Signed-off-by: Sukadev Bhattiprolu Acked-by: Serge Hallyn Reviewed-by: Oren Laadan --- include/linux/sched.h | 3 +++ include/linux/types.h | 5 +++++ kernel/fork.c | 16 ++++++++++++++-- 3 files changed, 22 insertions(+), 2 deletions(-) Index: linux-2.6/include/linux/sched.h =================================================================== --- linux-2.6.orig/include/linux/sched.h 2009-09-07 13:10:39.000000000 -0700 +++ linux-2.6/include/linux/sched.h 2009-09-07 13:13:33.000000000 -0700 @@ -2054,6 +2054,9 @@ extern int do_execve(char *, char __user * __user *, char __user * __user *, struct pt_regs *); extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *); +extern long do_fork_with_pids(unsigned long, unsigned long, struct pt_regs *, + unsigned long, int __user *, int __user *, + struct pid_set __user *pid_set); struct task_struct *fork_idle(int); extern void set_task_comm(struct task_struct *tsk, char *from); Index: linux-2.6/include/linux/types.h =================================================================== --- linux-2.6.orig/include/linux/types.h 2009-09-05 19:16:37.000000000 -0700 +++ linux-2.6/include/linux/types.h 2009-09-07 13:13:33.000000000 -0700 @@ -204,6 +204,11 @@ char f_fpack[6]; }; +struct pid_set { + int num_pids; + pid_t *pids; +}; + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _LINUX_TYPES_H */ Index: linux-2.6/kernel/fork.c =================================================================== --- linux-2.6.orig/kernel/fork.c 2009-09-07 13:13:33.000000000 -0700 +++ linux-2.6/kernel/fork.c 2009-09-07 13:13:33.000000000 -0700 @@ -1332,12 +1332,13 @@ * It copies the process, and if successful kick-starts * it and waits for it to finish using the VM if required. */ -long do_fork(unsigned long clone_flags, +long do_fork_with_pids(unsigned long clone_flags, unsigned long stack_start, struct pt_regs *regs, unsigned long stack_size, int __user *parent_tidptr, - int __user *child_tidptr) + int __user *child_tidptr, + struct pid_set __user *pid_setp) { struct task_struct *p; int trace = 0; @@ -1440,6 +1441,17 @@ return nr; } +long do_fork(unsigned long clone_flags, + unsigned long stack_start, + struct pt_regs *regs, + unsigned long stack_size, + int __user *parent_tidptr, + int __user *child_tidptr) +{ + return do_fork_with_pids(clone_flags, stack_start, regs, stack_size, + parent_tidptr, child_tidptr, NULL); +} + #ifndef ARCH_MIN_MMSTRUCT_ALIGN #define ARCH_MIN_MMSTRUCT_ALIGN 0 #endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/