2 * fs/sysfs/group.c - Operations for adding/removing multiple files at once.
4 * Copyright (c) 2003 Patrick Mochel
5 * Copyright (c) 2003 Open Source Development Lab
7 * This file is released undert the GPL v2.
11 #include <linux/kobject.h>
12 #include <linux/module.h>
13 #include <linux/dcache.h>
14 #include <linux/namei.h>
15 #include <linux/err.h>
19 static void remove_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
20 const struct attribute_group *grp)
22 struct attribute *const* attr;
25 for (i = 0, attr = grp->attrs; *attr; i++, attr++)
26 if (!grp->is_visible ||
27 grp->is_visible(kobj, *attr, i))
28 sysfs_hash_and_remove(dir_sd, (*attr)->name);
31 static int create_files(struct sysfs_dirent *dir_sd, struct kobject *kobj,
32 const struct attribute_group *grp)
34 struct attribute *const* attr;
37 for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++)
38 if (!grp->is_visible ||
39 grp->is_visible(kobj, *attr, i))
41 sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR);
43 remove_files(dir_sd, kobj, grp);
48 int sysfs_create_group(struct kobject * kobj,
49 const struct attribute_group * grp)
51 struct sysfs_dirent *sd;
54 BUG_ON(!kobj || !kobj->sd);
57 error = sysfs_create_subdir(kobj, grp->name, &sd);
63 error = create_files(sd, kobj, grp);
66 sysfs_remove_subdir(sd);
72 void sysfs_remove_group(struct kobject * kobj,
73 const struct attribute_group * grp)
75 struct sysfs_dirent *dir_sd = kobj->sd;
76 struct sysfs_dirent *sd;
79 sd = sysfs_get_dirent(dir_sd, grp->name);
81 printk(KERN_WARNING "sysfs group %p not found for "
82 "kobject '%s'\n", grp, kobject_name(kobj));
87 sd = sysfs_get(dir_sd);
89 remove_files(sd, kobj, grp);
91 sysfs_remove_subdir(sd);
97 EXPORT_SYMBOL_GPL(sysfs_create_group);
98 EXPORT_SYMBOL_GPL(sysfs_remove_group);