From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757691Ab1DAOpv (ORCPT ); Fri, 1 Apr 2011 10:45:51 -0400 Received: from e23smtp01.au.ibm.com ([202.81.31.143]:56649 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757651Ab1DAOpr (ORCPT ); Fri, 1 Apr 2011 10:45:47 -0400 From: Srikar Dronamraju To: Peter Zijlstra , Ingo Molnar Cc: Steven Rostedt , Srikar Dronamraju , Linux-mm , Arnaldo Carvalho de Melo , Linus Torvalds , Jonathan Corbet , Christoph Hellwig , Masami Hiramatsu , Thomas Gleixner , Ananth N Mavinakayanahalli , Oleg Nesterov , Andrew Morton , SystemTap , Jim Keniston , Roland McGrath , Andi Kleen , LKML Date: Fri, 01 Apr 2011 20:06:02 +0530 Message-Id: <20110401143602.15455.82211.sendpatchset@localhost6.localdomain6> In-Reply-To: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6> References: <20110401143223.15455.19844.sendpatchset@localhost6.localdomain6> Subject: [PATCH v3 2.6.39-rc1-tip 18/26] 18: uprobes: commonly used filters. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provides most commonly used filters that most users of uprobes can reuse. However this would be useful once we can dynamically associate a filter with a uprobe-event tracer. Signed-off-by: Srikar Dronamraju --- include/linux/uprobes.h | 5 +++++ kernel/uprobes.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+), 0 deletions(-) diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 26c4d78..34b989f 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -65,6 +65,11 @@ struct uprobe_consumer { struct uprobe_consumer *next; }; +struct uprobe_simple_consumer { + struct uprobe_consumer consumer; + pid_t fvalue; +}; + struct uprobe { struct rb_node rb_node; /* node in the rb tree */ atomic_t ref; diff --git a/kernel/uprobes.c b/kernel/uprobes.c index cdd52d0..c950f13 100644 --- a/kernel/uprobes.c +++ b/kernel/uprobes.c @@ -1389,6 +1389,56 @@ int uprobe_post_notifier(struct pt_regs *regs) return 0; } +bool uprobes_pid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + struct uprobe_simple_consumer *usc; + + usc = container_of(self, struct uprobe_simple_consumer, consumer); + if (t->tgid == usc->fvalue) + return true; + return false; +} + +bool uprobes_tid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + struct uprobe_simple_consumer *usc; + + usc = container_of(self, struct uprobe_simple_consumer, consumer); + if (t->pid == usc->fvalue) + return true; + return false; +} + +bool uprobes_ppid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + pid_t pid; + struct uprobe_simple_consumer *usc; + + usc = container_of(self, struct uprobe_simple_consumer, consumer); + rcu_read_lock(); + pid = task_tgid_vnr(t->real_parent); + rcu_read_unlock(); + + if (pid == usc->fvalue) + return true; + return false; +} + +bool uprobes_sid_filter(struct uprobe_consumer *self, struct task_struct *t) +{ + pid_t pid; + struct uprobe_simple_consumer *usc; + + usc = container_of(self, struct uprobe_simple_consumer, consumer); + rcu_read_lock(); + pid = pid_vnr(task_session(t)); + rcu_read_unlock(); + + if (pid == usc->fvalue) + return true; + return false; +} + struct notifier_block uprobes_exception_nb = { .notifier_call = uprobes_exception_notify, .priority = 0x7ffffff0,