Re: PATCPATCH -- add unlimited name lengths support to sysfs

[Greg KH <greg@kroah.com>]

On Wed, Dec 17, 2003 at 08:23:06PM -0600, Linda Xie wrote:
> Greg KH wrote:
> >On Wed, Dec 17, 2003 at 02:27:57PM -0600, Linda Xie wrote:
> >
> >>Greg KH wrote:
> >>
> >>>On Tue, Dec 16, 2003 at 05:07:22PM -0600, Linda Xie wrote:
> >>>
> >>>
> >>>>diff -Nru a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
> >>>>--- a/fs/sysfs/symlink.c	Sun Dec 14 21:19:29 2003
> >>>>+++ b/fs/sysfs/symlink.c	Sun Dec 14 21:19:29 2003
> >>>>@@ -42,7 +42,10 @@
> >>>>	struct kobject * p = kobj;
> >>>>	int length = 1;
> >>>>	do {
> >>>>-		length += strlen(p->name) + 1;
> >>>>+		if (p->k_name)
> >>>>+			length += strlen(p->k_name) + 1;
> >>>>+		else
> >>>>+			length += strlen(p->name) + 1;
> >>>
> >>>
> >>>Shouldn't this just be:
> >>>		length += strlen(kobject_name(p)) + 1;
> >>>
> >>
> >>That is correct. But here is my concern: Some of the callers of 
> >>sysfs_create_link()
> >>set p->name instead of p->k_name. So for them, the length calculated 
> >>using kobject_name(p) will be incorrect. Correct me if I am wrong.
> >
> >
> >Well if a kobject only uses the .name field, .k_name will point to it
> >(see kobject_add()), so the kobject_name() call will work in the above
> >case (as it should always do.)  Actually that if (p->k_name) statement
> >will always be true because of this fact :)
> >
> >This lets people like the edd driver which does:
> >	 snprintf(edev->kobj.name, EDD_DEVICE_NAME_SIZE, "int13_dev%02x", 
> >	 edd[i].device);
> >still work properly.  Ideally, callers like this should change to use
> >the kobject_set_name() function, but there's no rush.
> >
> >thanks,
> >
> >greg k-h
> >
> 
> Thank you very much. Below is an updated patch:

Ick, that patch had no tabs :(

Care to fix your email client and send it to me again?

thanks,

greg k-h