/* * 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 <linux/fs.h> #include <asm/semaphore.h> #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) { dir = lookup_one_len_kern(grp->name, kobj->dentry, strlen(grp->name)); BUG_ON(IS_ERR(dir)); } 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);