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/*

 * 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);