On Wed, 2010-02-17 at 23:23 -0500, Pavel Roskin wrote:
> The idea is to descend the directory structure from the top (i.e. the
> directory to be removed) to look for a child that is a file or an empty
> directory and remove it. Then start from the top and do the same until
> the top directory has no children. Then remove the top directory.
Here it is. I tested it by actually replacing the original function in
wireless-testing. I checked unloading all wireless drivers. I also
tested error handling by keeping a file in debugfs open while removing
the modules.
I could compile it against Linux 2.6.26, so it's portable enough for our
purposes.
void debugfs_remove_recursive(struct dentry *dentry)
{
struct dentry *last = NULL;
/* Sanity checks */
if (!dentry || !dentry->d_parent || !dentry->d_parent->d_inode)
return;
while (dentry != last) {
struct dentry *child = dentry;
/* Find a child without children */
while (!list_empty(&child->d_subdirs))
child = list_entry(child->d_subdirs.next, struct dentry,
d_u.d_child);
/* Bail out if we already tried to remove that entry */
if (child == last)
return;
last = child;
debugfs_remove(child);
}
}
--
Regards,
Pavel Roskin
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