linux-kernel - Re: [RFC] [PATCH] To list all active probes in the system

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Message-ID: <20070206145609.GA11249@slug>
Date:	Tue, 6 Feb 2007 14:56:09 +0000
From:	Frederik Deweerdt <deweerdt@...e.fr>
To:	Srinivasa Ds <srinivasa@...ibm.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, akpm@...l.org, torvalds@...l.org,
	jkenisto@...ibm.com, anil.s.keshavamurthy@...el.com,
	prasanna@...ibm.com, ananth@...ibm.com
Subject: Re: [RFC] [PATCH] To list all active probes in the system

Hi,

Comments below,

On Tue, Feb 06, 2007 at 08:17:06PM +0530, Srinivasa Ds wrote:
> Srinivasa Ds wrote:
> > Christoph Hellwig wrote:
> >> On Tue, Feb 06, 2007 at 03:25:35PM +0530, Srinivasa Ds wrote:
> >>> Hi folks
> >>>
> >>>         I have developed a patch, that lists all active probes in the
> >>> system. I have done this through /proc interface. Currently list is
> >>> available under /proc/kprobes/list. Any suggestions for better place and
> >>> name??
> >> /debug/kprobes/list? :)
> >>
> > Good Idea, I will update my patch to use debugfs.
> Patch that uses debugfs.
> 
> Signed-off-by: Srinivasa DS <srinivasa@...ibm.com>
> 
> 
> 
> 
> 

>  fs/debugfs/inode.c      |    4 ++
>  include/linux/kprobes.h |    4 ++
>  kernel/kprobes.c        |   92 ++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 100 insertions(+)
> 
> Index: linux-2.6.20/fs/debugfs/inode.c
> ===================================================================
> --- linux-2.6.20.orig/fs/debugfs/inode.c
> +++ linux-2.6.20/fs/debugfs/inode.c
> @@ -25,6 +25,7 @@
>  #include <linux/namei.h>
>  #include <linux/debugfs.h>
>  #include <linux/fsnotify.h>
> +#include <linux/kprobes.h>
>  
>  #define DEBUGFS_MAGIC	0x64626720
>  
> @@ -320,6 +321,9 @@ static int __init debugfs_init(void)
>  	retval = register_filesystem(&debug_fs_type);
>  	if (retval)
>  		subsystem_unregister(&debug_subsys);
> +#ifdef CONFIG_KPROBES
> +	debugfs_kprobe_init();
> +#endif
The ifdef here could be skipped if ....
>  	return retval;
>  }
>  
[... snip ...]
> Index: linux-2.6.20/include/linux/kprobes.h
> ===================================================================
> --- linux-2.6.20.orig/include/linux/kprobes.h
> +++ linux-2.6.20/include/linux/kprobes.h
> @@ -203,6 +203,7 @@ struct kretprobe_instance *get_free_rp_i
>  void add_rp_inst(struct kretprobe_instance *ri);
>  void kprobe_flush_task(struct task_struct *tk);
>  void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
> +void debugfs_kprobe_init(void);
>  #else /* CONFIG_KPROBES */
>  
>  #define __kprobes	/**/
> @@ -240,5 +241,8 @@ static inline void unregister_kretprobe(
>  static inline void kprobe_flush_task(struct task_struct *tk)
>  {
>  }
> +static inline void proc_kprobe_init(void)
> +{
> +}
... this was renamed to debugfs_kprobe_init() instead -which was your
first intention I suppose ;)-

Regards,
Frederik
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