linux-kernel - Re: [PATCH] sysfs: Update the name hash when renaming sysfs entries

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Message-ID: <4F27FDA0.6090806@suse.cz>
Date:	Tue, 31 Jan 2012 15:41:36 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Greg KH <greg@...ah.com>, Greg Kroah-Hartman <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	ML netdev <netdev@...r.kernel.org>,
	Kay Sievers <kay.sievers@...y.org>
Subject: Re: [PATCH] sysfs:  Update the name hash when renaming sysfs entries

On 01/31/2012 03:40 PM, Eric W. Biederman wrote:
> 
> This fixes a bug introduced with sysfs name hashes where renaming a
> network device appears to succeed but silently makes the sysfs files for
> that network device inaccessible.
> 
> In at least one configuration this bug has stopped networking from
> coming up during boot.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>

It works for me. Thanks.

Tested-by: Jiri Slaby <jslaby@...e.cz>

> ---
>  fs/sysfs/dir.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
> index ea64d01..dd3779c 100644
> --- a/fs/sysfs/dir.c
> +++ b/fs/sysfs/dir.c
> @@ -872,6 +872,7 @@ int sysfs_rename(struct sysfs_dirent *sd,
>  
>  		dup_name = sd->s_name;
>  		sd->s_name = new_name;
> +		sd->s_hash = sysfs_name_hash(sd->s_ns, sd->s_name);
>  	}
>  
>  	/* Move to the appropriate place in the appropriate directories rbtree. */


-- 
js
suse labs
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