90bc61359d
While shadow directories appear to be a good idea, the current scheme
of controlling their creation and destruction outside of sysfs appears
to be a locking and maintenance nightmare in the face of sysfs
directories dynamically coming and going. Which can now occur for
directories containing network devices when CONFIG_SYSFS_DEPRECATED is
not set.
This patch removes everything from the initial shadow directory support
that allowed the shadow directory creation to be controlled at a higher
level. So except for a few bits of sysfs_rename_dir everything from
commit b592fcfe7f is now gone.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
/*
|
|
* fs/sysfs/group.c - Operations for adding/removing multiple files at once.
|
|
*
|
|
* Copyright (c) 2003 Patrick Mochel
|
|
* Copyright (c) 2003 Open Source Development Lab
|
|
*
|
|
* This file is released undert the GPL v2.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kobject.h>
|
|
#include <linux/module.h>
|
|
#include <linux/dcache.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/err.h>
|
|
#include "sysfs.h"
|
|
|
|
|
|
static void remove_files(struct sysfs_dirent *dir_sd,
|
|
const struct attribute_group *grp)
|
|
{
|
|
struct attribute *const* attr;
|
|
|
|
for (attr = grp->attrs; *attr; attr++)
|
|
sysfs_hash_and_remove(dir_sd, (*attr)->name);
|
|
}
|
|
|
|
static int create_files(struct sysfs_dirent *dir_sd,
|
|
const struct attribute_group *grp)
|
|
{
|
|
struct attribute *const* attr;
|
|
int error = 0;
|
|
|
|
for (attr = grp->attrs; *attr && !error; attr++)
|
|
error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
|
|
if (error)
|
|
remove_files(dir_sd, grp);
|
|
return error;
|
|
}
|
|
|
|
|
|
int sysfs_create_group(struct kobject * kobj,
|
|
const struct attribute_group * grp)
|
|
{
|
|
struct sysfs_dirent *sd;
|
|
int error;
|
|
|
|
BUG_ON(!kobj || !kobj->sd);
|
|
|
|
if (grp->name) {
|
|
error = sysfs_create_subdir(kobj, grp->name, &sd);
|
|
if (error)
|
|
return error;
|
|
} else
|
|
sd = kobj->sd;
|
|
sysfs_get(sd);
|
|
error = create_files(sd, grp);
|
|
if (error) {
|
|
if (grp->name)
|
|
sysfs_remove_subdir(sd);
|
|
}
|
|
sysfs_put(sd);
|
|
return error;
|
|
}
|
|
|
|
void sysfs_remove_group(struct kobject * kobj,
|
|
const struct attribute_group * grp)
|
|
{
|
|
struct sysfs_dirent *dir_sd = kobj->sd;
|
|
struct sysfs_dirent *sd;
|
|
|
|
if (grp->name) {
|
|
sd = sysfs_get_dirent(dir_sd, grp->name);
|
|
BUG_ON(!sd);
|
|
} else
|
|
sd = sysfs_get(dir_sd);
|
|
|
|
remove_files(sd, grp);
|
|
if (grp->name)
|
|
sysfs_remove_subdir(sd);
|
|
|
|
sysfs_put(sd);
|
|
}
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(sysfs_create_group);
|
|
EXPORT_SYMBOL_GPL(sysfs_remove_group);
|