Re: sysfs: spit a warning to users when they try to create a duplicate sysfs file

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Greg KH wrote:
> We want to let people know when we create a duplicate sysfs file, as
> they need to fix up their code.
> 
> 
> Signed-off-by: Greg Kroah-Hartman <[email protected]>
> 
> ---
>  fs/sysfs/dir.c |    6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> --- a/fs/sysfs/dir.c
> +++ b/fs/sysfs/dir.c
> @@ -428,8 +428,12 @@ void sysfs_addrm_start(struct sysfs_addr
>   */
>  int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
>  {
> -	if (sysfs_find_dirent(acxt->parent_sd, sd->s_name))
> +	if (sysfs_find_dirent(acxt->parent_sd, sd->s_name)) {
> +		printk(KERN_WARNING, "sysfs: duplicate filename '%s' "
> +		       "can not be created\n", sd->s_name);
> +		WARN_ON(1);
>  		return -EEXIST;
> +	}
>  
>  	sd->s_parent = sysfs_get(acxt->parent_sd);
>  

As a side story:

I've got code which has checks for device_create_file != 0 but keeps
quiet if it got -EEXIST.  I rewrote it now so that it does not rely on
the driver core to skip over already existing files.  Doing this
revealed a group of old refcounting bugs. :-)  Thanks,
-- 
Stefan Richter
-=====-=-=== =--= -====
http://arcgraph.de/sr/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux