Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932320AbXLTNLx (ORCPT ); Thu, 20 Dec 2007 08:11:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758588AbXLTNLp (ORCPT ); Thu, 20 Dec 2007 08:11:45 -0500 Received: from public.id2-vpn.continvity.gns.novell.com ([195.33.99.129]:43779 "EHLO public.id2-vpn.continvity.gns.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754102AbXLTNLo convert rfc822-to-8bit (ORCPT ); Thu, 20 Dec 2007 08:11:44 -0500 Message-Id: <476A7832.76E4.0078.0@novell.com> X-Mailer: Novell GroupWise Internet Agent 7.0.2 HP Date: Thu, 20 Dec 2007 13:12:02 +0000 From: "Jan Beulich" To: Subject: [PATCH 1/4] add task handling notifier: base definitions Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2589 Lines: 82 This is the base patch, adding notification for task creation and deletion. Signed-off-by: Jan Beulich --- include/linux/sched.h | 8 +++++++- kernel/fork.c | 11 +++++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) --- 2.6.24-rc5-notify-task.orig/include/linux/sched.h +++ 2.6.24-rc5-notify-task/include/linux/sched.h @@ -80,7 +80,7 @@ struct sched_param { #include #include #include - +#include #include #include #include @@ -1700,6 +1700,12 @@ extern int do_execve(char *, char __user extern long do_fork(unsigned long, unsigned long, struct pt_regs *, unsigned long, int __user *, int __user *); struct task_struct *fork_idle(int); +#define TASK_NEW 1 +#define TASK_DELETE 2 + +extern struct blocking_notifier_head task_notifier_list; +extern struct atomic_notifier_head atomic_task_notifier_list; + extern void set_task_comm(struct task_struct *tsk, char *from); extern void get_task_comm(char *to, struct task_struct *tsk); --- 2.6.24-rc5-notify-task.orig/kernel/fork.c +++ 2.6.24-rc5-notify-task/kernel/fork.c @@ -46,6 +46,7 @@ #include #include #include +#include #include #include #include @@ -71,6 +72,11 @@ DEFINE_PER_CPU(unsigned long, process_co __cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */ +BLOCKING_NOTIFIER_HEAD(task_notifier_list); +EXPORT_SYMBOL_GPL(task_notifier_list); +ATOMIC_NOTIFIER_HEAD(atomic_task_notifier_list); +EXPORT_SYMBOL_GPL(atomic_task_notifier_list); + int nr_processes(void) { int cpu; @@ -121,6 +127,9 @@ void __put_task_struct(struct task_struc WARN_ON(atomic_read(&tsk->usage)); WARN_ON(tsk == current); + atomic_notifier_call_chain(&atomic_task_notifier_list, + TASK_DELETE, tsk); + security_task_free(tsk); free_uid(tsk->user); put_group_info(tsk->group_info); @@ -1450,6 +1459,8 @@ long do_fork(unsigned long clone_flags, set_tsk_thread_flag(p, TIF_SIGPENDING); } + blocking_notifier_call_chain(&task_notifier_list, TASK_NEW, p); + if (!(clone_flags & CLONE_STOPPED)) wake_up_new_task(p, clone_flags); else -- 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/