2005-04-16 22:20:36 +00:00
|
|
|
/*
|
|
|
|
* 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>
|
2005-06-23 07:09:12 +00:00
|
|
|
#include <linux/namei.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include <linux/err.h>
|
2006-12-20 09:52:44 +00:00
|
|
|
#include <asm/semaphore.h>
|
2005-04-16 22:20:36 +00:00
|
|
|
#include "sysfs.h"
|
|
|
|
|
|
|
|
|
|
|
|
static void remove_files(struct dentry * dir,
|
|
|
|
const struct attribute_group * grp)
|
|
|
|
{
|
|
|
|
struct attribute *const* attr;
|
|
|
|
|
|
|
|
for (attr = grp->attrs; *attr; attr++)
|
|
|
|
sysfs_hash_and_remove(dir,(*attr)->name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int create_files(struct dentry * dir,
|
|
|
|
const struct attribute_group * grp)
|
|
|
|
{
|
|
|
|
struct attribute *const* attr;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
for (attr = grp->attrs; *attr && !error; attr++) {
|
|
|
|
error = sysfs_add_file(dir, *attr, SYSFS_KOBJ_ATTR);
|
|
|
|
}
|
|
|
|
if (error)
|
|
|
|
remove_files(dir,grp);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
int sysfs_create_group(struct kobject * kobj,
|
|
|
|
const struct attribute_group * grp)
|
|
|
|
{
|
|
|
|
struct dentry * dir;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
BUG_ON(!kobj || !kobj->dentry);
|
|
|
|
|
|
|
|
if (grp->name) {
|
|
|
|
error = sysfs_create_subdir(kobj,grp->name,&dir);
|
|
|
|
if (error)
|
|
|
|
return error;
|
|
|
|
} else
|
|
|
|
dir = kobj->dentry;
|
|
|
|
dir = dget(dir);
|
|
|
|
if ((error = create_files(dir,grp))) {
|
|
|
|
if (grp->name)
|
|
|
|
sysfs_remove_subdir(dir);
|
|
|
|
}
|
|
|
|
dput(dir);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
void sysfs_remove_group(struct kobject * kobj,
|
|
|
|
const struct attribute_group * grp)
|
|
|
|
{
|
|
|
|
struct dentry * dir;
|
|
|
|
|
|
|
|
if (grp->name)
|
2005-06-23 07:09:12 +00:00
|
|
|
dir = lookup_one_len(grp->name, kobj->dentry,
|
|
|
|
strlen(grp->name));
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
|
|
|
dir = dget(kobj->dentry);
|
|
|
|
|
|
|
|
remove_files(dir,grp);
|
|
|
|
if (grp->name)
|
|
|
|
sysfs_remove_subdir(dir);
|
|
|
|
/* release the ref. taken in this routine */
|
|
|
|
dput(dir);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(sysfs_create_group);
|
|
|
|
EXPORT_SYMBOL_GPL(sysfs_remove_group);
|