linux-kernel - Re: [PATCH 1/11] LTTng-core 0.5.111 : Relay+DebugFS (DebugFS fix)

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Date:	Sun, 17 Sep 2006 09:07:05 -0700
From:	Greg KH <gregkh@...e.de>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tom Zanussi <zanussi@...ibm.com>, ltt-dev@...fik.org,
	Michel Dagenais <michel.dagenais@...ymtl.ca>,
	Douglas Niehaus <niehaus@...s.ku.edu>
Subject: Re: [PATCH 1/11] LTTng-core 0.5.111 : Relay+DebugFS (DebugFS fix)

On Sat, Sep 16, 2006 at 03:51:03AM -0400, Mathieu Desnoyers wrote:
> 1 - DebugFS stalled dentry patch
> DebugFS seems to keep a stalled dentry when a process is in a directory that is
> being removed. Force a differed deletion.
> patch-2.6.17-lttng-core-0.5.111-debugfs.diff
> 
> 
> OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
> Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 

> --- a/fs/debugfs/inode.c
> +++ b/fs/debugfs/inode.c
> @@ -266,6 +266,7 @@ EXPORT_SYMBOL_GPL(debugfs_create_dir);
>  void debugfs_remove(struct dentry *dentry)
>  {
>  	struct dentry *parent;
> +	int ret = 0;
>  	
>  	if (!dentry)
>  		return;
> @@ -278,9 +279,10 @@ void debugfs_remove(struct dentry *dentr
>  	if (debugfs_positive(dentry)) {
>  		if (dentry->d_inode) {
>  			if (S_ISDIR(dentry->d_inode->i_mode))
> -				simple_rmdir(parent->d_inode, dentry);
> +				ret = simple_rmdir(parent->d_inode, dentry);
>  			else
> -				simple_unlink(parent->d_inode, dentry);
> +				ret = simple_unlink(parent->d_inode, dentry);
> +			if(ret) d_delete(dentry);

Are you saying that perhaps all other users of simple_unlink() are also
broken like this?  If so, why not just fix simple_unlink()?

Also, wrong coding style used :(

thanks,

greg k-h
-
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