Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/sysfs/group.c - Operations for adding/removing multiple files at once. | |
3 | * | |
4 | * Copyright (c) 2003 Patrick Mochel | |
5 | * Copyright (c) 2003 Open Source Development Lab | |
6 | * | |
7 | * This file is released undert the GPL v2. | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/kobject.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/dcache.h> | |
5f45f1a7 | 14 | #include <linux/namei.h> |
1da177e4 | 15 | #include <linux/err.h> |
b592fcfe | 16 | #include <linux/fs.h> |
94bebf4d | 17 | #include <asm/semaphore.h> |
1da177e4 LT |
18 | #include "sysfs.h" |
19 | ||
20 | ||
608e266a TH |
21 | static void remove_files(struct sysfs_dirent *dir_sd, |
22 | const struct attribute_group *grp) | |
1da177e4 LT |
23 | { |
24 | struct attribute *const* attr; | |
25 | ||
26 | for (attr = grp->attrs; *attr; attr++) | |
608e266a | 27 | sysfs_hash_and_remove(dir_sd, (*attr)->name); |
1da177e4 LT |
28 | } |
29 | ||
608e266a TH |
30 | static int create_files(struct sysfs_dirent *dir_sd, |
31 | const struct attribute_group *grp) | |
1da177e4 LT |
32 | { |
33 | struct attribute *const* attr; | |
34 | int error = 0; | |
35 | ||
608e266a TH |
36 | for (attr = grp->attrs; *attr && !error; attr++) |
37 | error = sysfs_add_file(dir_sd, *attr, SYSFS_KOBJ_ATTR); | |
1da177e4 | 38 | if (error) |
608e266a | 39 | remove_files(dir_sd, grp); |
1da177e4 LT |
40 | return error; |
41 | } | |
42 | ||
43 | ||
44 | int sysfs_create_group(struct kobject * kobj, | |
45 | const struct attribute_group * grp) | |
46 | { | |
608e266a | 47 | struct sysfs_dirent *sd; |
1da177e4 LT |
48 | int error; |
49 | ||
608e266a | 50 | BUG_ON(!kobj || !kobj->sd); |
1da177e4 LT |
51 | |
52 | if (grp->name) { | |
608e266a | 53 | error = sysfs_create_subdir(kobj, grp->name, &sd); |
1da177e4 LT |
54 | if (error) |
55 | return error; | |
56 | } else | |
608e266a TH |
57 | sd = kobj->sd; |
58 | sysfs_get(sd); | |
59 | error = create_files(sd, grp); | |
60 | if (error) { | |
1da177e4 | 61 | if (grp->name) |
608e266a | 62 | sysfs_remove_subdir(sd); |
1da177e4 | 63 | } |
608e266a | 64 | sysfs_put(sd); |
1da177e4 LT |
65 | return error; |
66 | } | |
67 | ||
68 | void sysfs_remove_group(struct kobject * kobj, | |
69 | const struct attribute_group * grp) | |
70 | { | |
608e266a TH |
71 | struct sysfs_dirent *dir_sd = kobj->sd; |
72 | struct sysfs_dirent *sd; | |
1da177e4 | 73 | |
057f6c01 | 74 | if (grp->name) { |
608e266a TH |
75 | sd = sysfs_get_dirent(dir_sd, grp->name); |
76 | BUG_ON(!sd); | |
77 | } else | |
78 | sd = sysfs_get(dir_sd); | |
1da177e4 | 79 | |
608e266a | 80 | remove_files(sd, grp); |
1da177e4 | 81 | if (grp->name) |
608e266a TH |
82 | sysfs_remove_subdir(sd); |
83 | ||
84 | sysfs_put(sd); | |
1da177e4 LT |
85 | } |
86 | ||
87 | ||
88 | EXPORT_SYMBOL_GPL(sysfs_create_group); | |
89 | EXPORT_SYMBOL_GPL(sysfs_remove_group); |