| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * sysfs.h - definitions for the device driver filesystem |
| 4 | * |
| 5 | * Copyright (c) 2001,2002 Patrick Mochel |
| 6 | * Copyright (c) 2004 Silicon Graphics, Inc. |
| 7 | * Copyright (c) 2007 SUSE Linux Products GmbH |
| 8 | * Copyright (c) 2007 Tejun Heo <teheo@suse.de> |
| 9 | * |
| 10 | * Please see Documentation/filesystems/sysfs.rst for more information. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _SYSFS_H_ |
| 14 | #define _SYSFS_H_ |
| 15 | |
| 16 | #include <linux/kernfs.h> |
| 17 | #include <linux/compiler.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/list.h> |
| 20 | #include <linux/lockdep.h> |
| 21 | #include <linux/kobject_ns.h> |
| 22 | #include <linux/stat.h> |
| 23 | #include <linux/atomic.h> |
| 24 | |
| 25 | struct kobject; |
| 26 | struct module; |
| 27 | struct bin_attribute; |
| 28 | enum kobj_ns_type; |
| 29 | |
| 30 | struct attribute { |
| 31 | const char *name; |
| 32 | umode_t mode; |
| 33 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 34 | bool ignore_lockdep:1; |
| 35 | struct lock_class_key *key; |
| 36 | struct lock_class_key skey; |
| 37 | #endif |
| 38 | }; |
| 39 | |
| 40 | /** |
| 41 | * sysfs_attr_init - initialize a dynamically allocated sysfs attribute |
| 42 | * @attr: struct attribute to initialize |
| 43 | * |
| 44 | * Initialize a dynamically allocated struct attribute so we can |
| 45 | * make lockdep happy. This is a new requirement for attributes |
| 46 | * and initially this is only needed when lockdep is enabled. |
| 47 | * Lockdep gives a nice error when your attribute is added to |
| 48 | * sysfs if you don't have this. |
| 49 | */ |
| 50 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 51 | #define sysfs_attr_init(attr) \ |
| 52 | do { \ |
| 53 | static struct lock_class_key __key; \ |
| 54 | \ |
| 55 | (attr)->key = &__key; \ |
| 56 | } while (0) |
| 57 | #else |
| 58 | #define sysfs_attr_init(attr) do {} while (0) |
| 59 | #endif |
| 60 | |
| 61 | /** |
| 62 | * struct attribute_group - data structure used to declare an attribute group. |
| 63 | * @name: Optional: Attribute group name |
| 64 | * If specified, the attribute group will be created in |
| 65 | * a new subdirectory with this name. |
| 66 | * @is_visible: Optional: Function to return permissions associated with an |
| 67 | * attribute of the group. Will be called repeatedly for each |
| 68 | * non-binary attribute in the group. Only read/write |
| 69 | * permissions as well as SYSFS_PREALLOC are accepted. Must |
| 70 | * return 0 if an attribute is not visible. The returned value |
| 71 | * will replace static permissions defined in struct attribute. |
| 72 | * @is_bin_visible: |
| 73 | * Optional: Function to return permissions associated with a |
| 74 | * binary attribute of the group. Will be called repeatedly |
| 75 | * for each binary attribute in the group. Only read/write |
| 76 | * permissions as well as SYSFS_PREALLOC are accepted. Must |
| 77 | * return 0 if a binary attribute is not visible. The returned |
| 78 | * value will replace static permissions defined in |
| 79 | * struct bin_attribute. |
| 80 | * @attrs: Pointer to NULL terminated list of attributes. |
| 81 | * @bin_attrs: Pointer to NULL terminated list of binary attributes. |
| 82 | * Either attrs or bin_attrs or both must be provided. |
| 83 | */ |
| 84 | struct attribute_group { |
| 85 | const char *name; |
| 86 | umode_t (*is_visible)(struct kobject *, |
| 87 | struct attribute *, int); |
| 88 | umode_t (*is_bin_visible)(struct kobject *, |
| 89 | struct bin_attribute *, int); |
| 90 | struct attribute **attrs; |
| 91 | struct bin_attribute **bin_attrs; |
| 92 | }; |
| 93 | |
| 94 | /* |
| 95 | * Use these macros to make defining attributes easier. |
| 96 | * See include/linux/device.h for examples.. |
| 97 | */ |
| 98 | |
| 99 | #define SYSFS_PREALLOC 010000 |
| 100 | |
| 101 | #define __ATTR(_name, _mode, _show, _store) { \ |
| 102 | .attr = {.name = __stringify(_name), \ |
| 103 | .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \ |
| 104 | .show = _show, \ |
| 105 | .store = _store, \ |
| 106 | } |
| 107 | |
| 108 | #define __ATTR_PREALLOC(_name, _mode, _show, _store) { \ |
| 109 | .attr = {.name = __stringify(_name), \ |
| 110 | .mode = SYSFS_PREALLOC | VERIFY_OCTAL_PERMISSIONS(_mode) },\ |
| 111 | .show = _show, \ |
| 112 | .store = _store, \ |
| 113 | } |
| 114 | |
| 115 | #define __ATTR_RO(_name) { \ |
| 116 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
| 117 | .show = _name##_show, \ |
| 118 | } |
| 119 | |
| 120 | #define __ATTR_RO_MODE(_name, _mode) { \ |
| 121 | .attr = { .name = __stringify(_name), \ |
| 122 | .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \ |
| 123 | .show = _name##_show, \ |
| 124 | } |
| 125 | |
| 126 | #define __ATTR_RW_MODE(_name, _mode) { \ |
| 127 | .attr = { .name = __stringify(_name), \ |
| 128 | .mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \ |
| 129 | .show = _name##_show, \ |
| 130 | .store = _name##_store, \ |
| 131 | } |
| 132 | |
| 133 | #define __ATTR_WO(_name) { \ |
| 134 | .attr = { .name = __stringify(_name), .mode = 0200 }, \ |
| 135 | .store = _name##_store, \ |
| 136 | } |
| 137 | |
| 138 | #define __ATTR_RW(_name) __ATTR(_name, 0644, _name##_show, _name##_store) |
| 139 | |
| 140 | #define __ATTR_NULL { .attr = { .name = NULL } } |
| 141 | |
| 142 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 143 | #define __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) { \ |
| 144 | .attr = {.name = __stringify(_name), .mode = _mode, \ |
| 145 | .ignore_lockdep = true }, \ |
| 146 | .show = _show, \ |
| 147 | .store = _store, \ |
| 148 | } |
| 149 | #else |
| 150 | #define __ATTR_IGNORE_LOCKDEP __ATTR |
| 151 | #endif |
| 152 | |
| 153 | #define __ATTRIBUTE_GROUPS(_name) \ |
| 154 | static const struct attribute_group *_name##_groups[] = { \ |
| 155 | &_name##_group, \ |
| 156 | NULL, \ |
| 157 | } |
| 158 | |
| 159 | #define ATTRIBUTE_GROUPS(_name) \ |
| 160 | static const struct attribute_group _name##_group = { \ |
| 161 | .attrs = _name##_attrs, \ |
| 162 | }; \ |
| 163 | __ATTRIBUTE_GROUPS(_name) |
| 164 | |
| 165 | #define BIN_ATTRIBUTE_GROUPS(_name) \ |
| 166 | static const struct attribute_group _name##_group = { \ |
| 167 | .bin_attrs = _name##_attrs, \ |
| 168 | }; \ |
| 169 | __ATTRIBUTE_GROUPS(_name) |
| 170 | |
| 171 | struct file; |
| 172 | struct vm_area_struct; |
| 173 | struct address_space; |
| 174 | |
| 175 | struct bin_attribute { |
| 176 | struct attribute attr; |
| 177 | size_t size; |
| 178 | void *private; |
| 179 | struct address_space *(*f_mapping)(void); |
| 180 | ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *, |
| 181 | char *, loff_t, size_t); |
| 182 | ssize_t (*write)(struct file *, struct kobject *, struct bin_attribute *, |
| 183 | char *, loff_t, size_t); |
| 184 | loff_t (*llseek)(struct file *, struct kobject *, struct bin_attribute *, |
| 185 | loff_t, int); |
| 186 | int (*mmap)(struct file *, struct kobject *, struct bin_attribute *attr, |
| 187 | struct vm_area_struct *vma); |
| 188 | }; |
| 189 | |
| 190 | /** |
| 191 | * sysfs_bin_attr_init - initialize a dynamically allocated bin_attribute |
| 192 | * @attr: struct bin_attribute to initialize |
| 193 | * |
| 194 | * Initialize a dynamically allocated struct bin_attribute so we |
| 195 | * can make lockdep happy. This is a new requirement for |
| 196 | * attributes and initially this is only needed when lockdep is |
| 197 | * enabled. Lockdep gives a nice error when your attribute is |
| 198 | * added to sysfs if you don't have this. |
| 199 | */ |
| 200 | #define sysfs_bin_attr_init(bin_attr) sysfs_attr_init(&(bin_attr)->attr) |
| 201 | |
| 202 | /* macros to create static binary attributes easier */ |
| 203 | #define __BIN_ATTR(_name, _mode, _read, _write, _size) { \ |
| 204 | .attr = { .name = __stringify(_name), .mode = _mode }, \ |
| 205 | .read = _read, \ |
| 206 | .write = _write, \ |
| 207 | .size = _size, \ |
| 208 | } |
| 209 | |
| 210 | #define __BIN_ATTR_RO(_name, _size) { \ |
| 211 | .attr = { .name = __stringify(_name), .mode = 0444 }, \ |
| 212 | .read = _name##_read, \ |
| 213 | .size = _size, \ |
| 214 | } |
| 215 | |
| 216 | #define __BIN_ATTR_WO(_name, _size) { \ |
| 217 | .attr = { .name = __stringify(_name), .mode = 0200 }, \ |
| 218 | .write = _name##_write, \ |
| 219 | .size = _size, \ |
| 220 | } |
| 221 | |
| 222 | #define __BIN_ATTR_RW(_name, _size) \ |
| 223 | __BIN_ATTR(_name, 0644, _name##_read, _name##_write, _size) |
| 224 | |
| 225 | #define __BIN_ATTR_NULL __ATTR_NULL |
| 226 | |
| 227 | #define BIN_ATTR(_name, _mode, _read, _write, _size) \ |
| 228 | struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \ |
| 229 | _write, _size) |
| 230 | |
| 231 | #define BIN_ATTR_RO(_name, _size) \ |
| 232 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size) |
| 233 | |
| 234 | #define BIN_ATTR_WO(_name, _size) \ |
| 235 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size) |
| 236 | |
| 237 | #define BIN_ATTR_RW(_name, _size) \ |
| 238 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size) |
| 239 | |
| 240 | |
| 241 | #define __BIN_ATTR_ADMIN_RO(_name, _size) { \ |
| 242 | .attr = { .name = __stringify(_name), .mode = 0400 }, \ |
| 243 | .read = _name##_read, \ |
| 244 | .size = _size, \ |
| 245 | } |
| 246 | |
| 247 | #define __BIN_ATTR_ADMIN_RW(_name, _size) \ |
| 248 | __BIN_ATTR(_name, 0600, _name##_read, _name##_write, _size) |
| 249 | |
| 250 | #define BIN_ATTR_ADMIN_RO(_name, _size) \ |
| 251 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RO(_name, _size) |
| 252 | |
| 253 | #define BIN_ATTR_ADMIN_RW(_name, _size) \ |
| 254 | struct bin_attribute bin_attr_##_name = __BIN_ATTR_ADMIN_RW(_name, _size) |
| 255 | |
| 256 | struct sysfs_ops { |
| 257 | ssize_t (*show)(struct kobject *, struct attribute *, char *); |
| 258 | ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t); |
| 259 | }; |
| 260 | |
| 261 | #ifdef CONFIG_SYSFS |
| 262 | |
| 263 | int __must_check sysfs_create_dir_ns(struct kobject *kobj, const void *ns); |
| 264 | void sysfs_remove_dir(struct kobject *kobj); |
| 265 | int __must_check sysfs_rename_dir_ns(struct kobject *kobj, const char *new_name, |
| 266 | const void *new_ns); |
| 267 | int __must_check sysfs_move_dir_ns(struct kobject *kobj, |
| 268 | struct kobject *new_parent_kobj, |
| 269 | const void *new_ns); |
| 270 | int __must_check sysfs_create_mount_point(struct kobject *parent_kobj, |
| 271 | const char *name); |
| 272 | void sysfs_remove_mount_point(struct kobject *parent_kobj, |
| 273 | const char *name); |
| 274 | |
| 275 | int __must_check sysfs_create_file_ns(struct kobject *kobj, |
| 276 | const struct attribute *attr, |
| 277 | const void *ns); |
| 278 | int __must_check sysfs_create_files(struct kobject *kobj, |
| 279 | const struct attribute * const *attr); |
| 280 | int __must_check sysfs_chmod_file(struct kobject *kobj, |
| 281 | const struct attribute *attr, umode_t mode); |
| 282 | struct kernfs_node *sysfs_break_active_protection(struct kobject *kobj, |
| 283 | const struct attribute *attr); |
| 284 | void sysfs_unbreak_active_protection(struct kernfs_node *kn); |
| 285 | void sysfs_remove_file_ns(struct kobject *kobj, const struct attribute *attr, |
| 286 | const void *ns); |
| 287 | bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr); |
| 288 | void sysfs_remove_files(struct kobject *kobj, const struct attribute * const *attr); |
| 289 | |
| 290 | int __must_check sysfs_create_bin_file(struct kobject *kobj, |
| 291 | const struct bin_attribute *attr); |
| 292 | void sysfs_remove_bin_file(struct kobject *kobj, |
| 293 | const struct bin_attribute *attr); |
| 294 | |
| 295 | int __must_check sysfs_create_link(struct kobject *kobj, struct kobject *target, |
| 296 | const char *name); |
| 297 | int __must_check sysfs_create_link_nowarn(struct kobject *kobj, |
| 298 | struct kobject *target, |
| 299 | const char *name); |
| 300 | void sysfs_remove_link(struct kobject *kobj, const char *name); |
| 301 | |
| 302 | int sysfs_rename_link_ns(struct kobject *kobj, struct kobject *target, |
| 303 | const char *old_name, const char *new_name, |
| 304 | const void *new_ns); |
| 305 | |
| 306 | void sysfs_delete_link(struct kobject *dir, struct kobject *targ, |
| 307 | const char *name); |
| 308 | |
| 309 | int __must_check sysfs_create_group(struct kobject *kobj, |
| 310 | const struct attribute_group *grp); |
| 311 | int __must_check sysfs_create_groups(struct kobject *kobj, |
| 312 | const struct attribute_group **groups); |
| 313 | int __must_check sysfs_update_groups(struct kobject *kobj, |
| 314 | const struct attribute_group **groups); |
| 315 | int sysfs_update_group(struct kobject *kobj, |
| 316 | const struct attribute_group *grp); |
| 317 | void sysfs_remove_group(struct kobject *kobj, |
| 318 | const struct attribute_group *grp); |
| 319 | void sysfs_remove_groups(struct kobject *kobj, |
| 320 | const struct attribute_group **groups); |
| 321 | int sysfs_add_file_to_group(struct kobject *kobj, |
| 322 | const struct attribute *attr, const char *group); |
| 323 | void sysfs_remove_file_from_group(struct kobject *kobj, |
| 324 | const struct attribute *attr, const char *group); |
| 325 | int sysfs_merge_group(struct kobject *kobj, |
| 326 | const struct attribute_group *grp); |
| 327 | void sysfs_unmerge_group(struct kobject *kobj, |
| 328 | const struct attribute_group *grp); |
| 329 | int sysfs_add_link_to_group(struct kobject *kobj, const char *group_name, |
| 330 | struct kobject *target, const char *link_name); |
| 331 | void sysfs_remove_link_from_group(struct kobject *kobj, const char *group_name, |
| 332 | const char *link_name); |
| 333 | int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, |
| 334 | struct kobject *target_kobj, |
| 335 | const char *target_name, |
| 336 | const char *symlink_name); |
| 337 | |
| 338 | void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr); |
| 339 | |
| 340 | int __must_check sysfs_init(void); |
| 341 | |
| 342 | static inline void sysfs_enable_ns(struct kernfs_node *kn) |
| 343 | { |
| 344 | return kernfs_enable_ns(kn); |
| 345 | } |
| 346 | |
| 347 | int sysfs_file_change_owner(struct kobject *kobj, const char *name, kuid_t kuid, |
| 348 | kgid_t kgid); |
| 349 | int sysfs_change_owner(struct kobject *kobj, kuid_t kuid, kgid_t kgid); |
| 350 | int sysfs_link_change_owner(struct kobject *kobj, struct kobject *targ, |
| 351 | const char *name, kuid_t kuid, kgid_t kgid); |
| 352 | int sysfs_groups_change_owner(struct kobject *kobj, |
| 353 | const struct attribute_group **groups, |
| 354 | kuid_t kuid, kgid_t kgid); |
| 355 | int sysfs_group_change_owner(struct kobject *kobj, |
| 356 | const struct attribute_group *groups, kuid_t kuid, |
| 357 | kgid_t kgid); |
| 358 | __printf(2, 3) |
| 359 | int sysfs_emit(char *buf, const char *fmt, ...); |
| 360 | __printf(3, 4) |
| 361 | int sysfs_emit_at(char *buf, int at, const char *fmt, ...); |
| 362 | |
| 363 | #else /* CONFIG_SYSFS */ |
| 364 | |
| 365 | static inline int sysfs_create_dir_ns(struct kobject *kobj, const void *ns) |
| 366 | { |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | static inline void sysfs_remove_dir(struct kobject *kobj) |
| 371 | { |
| 372 | } |
| 373 | |
| 374 | static inline int sysfs_rename_dir_ns(struct kobject *kobj, |
| 375 | const char *new_name, const void *new_ns) |
| 376 | { |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | static inline int sysfs_move_dir_ns(struct kobject *kobj, |
| 381 | struct kobject *new_parent_kobj, |
| 382 | const void *new_ns) |
| 383 | { |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static inline int sysfs_create_mount_point(struct kobject *parent_kobj, |
| 388 | const char *name) |
| 389 | { |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static inline void sysfs_remove_mount_point(struct kobject *parent_kobj, |
| 394 | const char *name) |
| 395 | { |
| 396 | } |
| 397 | |
| 398 | static inline int sysfs_create_file_ns(struct kobject *kobj, |
| 399 | const struct attribute *attr, |
| 400 | const void *ns) |
| 401 | { |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static inline int sysfs_create_files(struct kobject *kobj, |
| 406 | const struct attribute * const *attr) |
| 407 | { |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static inline int sysfs_chmod_file(struct kobject *kobj, |
| 412 | const struct attribute *attr, umode_t mode) |
| 413 | { |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | static inline struct kernfs_node * |
| 418 | sysfs_break_active_protection(struct kobject *kobj, |
| 419 | const struct attribute *attr) |
| 420 | { |
| 421 | return NULL; |
| 422 | } |
| 423 | |
| 424 | static inline void sysfs_unbreak_active_protection(struct kernfs_node *kn) |
| 425 | { |
| 426 | } |
| 427 | |
| 428 | static inline void sysfs_remove_file_ns(struct kobject *kobj, |
| 429 | const struct attribute *attr, |
| 430 | const void *ns) |
| 431 | { |
| 432 | } |
| 433 | |
| 434 | static inline bool sysfs_remove_file_self(struct kobject *kobj, |
| 435 | const struct attribute *attr) |
| 436 | { |
| 437 | return false; |
| 438 | } |
| 439 | |
| 440 | static inline void sysfs_remove_files(struct kobject *kobj, |
| 441 | const struct attribute * const *attr) |
| 442 | { |
| 443 | } |
| 444 | |
| 445 | static inline int sysfs_create_bin_file(struct kobject *kobj, |
| 446 | const struct bin_attribute *attr) |
| 447 | { |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | static inline void sysfs_remove_bin_file(struct kobject *kobj, |
| 452 | const struct bin_attribute *attr) |
| 453 | { |
| 454 | } |
| 455 | |
| 456 | static inline int sysfs_create_link(struct kobject *kobj, |
| 457 | struct kobject *target, const char *name) |
| 458 | { |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | static inline int sysfs_create_link_nowarn(struct kobject *kobj, |
| 463 | struct kobject *target, |
| 464 | const char *name) |
| 465 | { |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static inline void sysfs_remove_link(struct kobject *kobj, const char *name) |
| 470 | { |
| 471 | } |
| 472 | |
| 473 | static inline int sysfs_rename_link_ns(struct kobject *k, struct kobject *t, |
| 474 | const char *old_name, |
| 475 | const char *new_name, const void *ns) |
| 476 | { |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static inline void sysfs_delete_link(struct kobject *k, struct kobject *t, |
| 481 | const char *name) |
| 482 | { |
| 483 | } |
| 484 | |
| 485 | static inline int sysfs_create_group(struct kobject *kobj, |
| 486 | const struct attribute_group *grp) |
| 487 | { |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static inline int sysfs_create_groups(struct kobject *kobj, |
| 492 | const struct attribute_group **groups) |
| 493 | { |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static inline int sysfs_update_groups(struct kobject *kobj, |
| 498 | const struct attribute_group **groups) |
| 499 | { |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | static inline int sysfs_update_group(struct kobject *kobj, |
| 504 | const struct attribute_group *grp) |
| 505 | { |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static inline void sysfs_remove_group(struct kobject *kobj, |
| 510 | const struct attribute_group *grp) |
| 511 | { |
| 512 | } |
| 513 | |
| 514 | static inline void sysfs_remove_groups(struct kobject *kobj, |
| 515 | const struct attribute_group **groups) |
| 516 | { |
| 517 | } |
| 518 | |
| 519 | static inline int sysfs_add_file_to_group(struct kobject *kobj, |
| 520 | const struct attribute *attr, const char *group) |
| 521 | { |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | static inline void sysfs_remove_file_from_group(struct kobject *kobj, |
| 526 | const struct attribute *attr, const char *group) |
| 527 | { |
| 528 | } |
| 529 | |
| 530 | static inline int sysfs_merge_group(struct kobject *kobj, |
| 531 | const struct attribute_group *grp) |
| 532 | { |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | static inline void sysfs_unmerge_group(struct kobject *kobj, |
| 537 | const struct attribute_group *grp) |
| 538 | { |
| 539 | } |
| 540 | |
| 541 | static inline int sysfs_add_link_to_group(struct kobject *kobj, |
| 542 | const char *group_name, struct kobject *target, |
| 543 | const char *link_name) |
| 544 | { |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | static inline void sysfs_remove_link_from_group(struct kobject *kobj, |
| 549 | const char *group_name, const char *link_name) |
| 550 | { |
| 551 | } |
| 552 | |
| 553 | static inline int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj, |
| 554 | struct kobject *target_kobj, |
| 555 | const char *target_name, |
| 556 | const char *symlink_name) |
| 557 | { |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static inline void sysfs_notify(struct kobject *kobj, const char *dir, |
| 562 | const char *attr) |
| 563 | { |
| 564 | } |
| 565 | |
| 566 | static inline int __must_check sysfs_init(void) |
| 567 | { |
| 568 | return 0; |
| 569 | } |
| 570 | |
| 571 | static inline void sysfs_enable_ns(struct kernfs_node *kn) |
| 572 | { |
| 573 | } |
| 574 | |
| 575 | static inline int sysfs_file_change_owner(struct kobject *kobj, |
| 576 | const char *name, kuid_t kuid, |
| 577 | kgid_t kgid) |
| 578 | { |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | static inline int sysfs_link_change_owner(struct kobject *kobj, |
| 583 | struct kobject *targ, |
| 584 | const char *name, kuid_t kuid, |
| 585 | kgid_t kgid) |
| 586 | { |
| 587 | return 0; |
| 588 | } |
| 589 | |
| 590 | static inline int sysfs_change_owner(struct kobject *kobj, kuid_t kuid, kgid_t kgid) |
| 591 | { |
| 592 | return 0; |
| 593 | } |
| 594 | |
| 595 | static inline int sysfs_groups_change_owner(struct kobject *kobj, |
| 596 | const struct attribute_group **groups, |
| 597 | kuid_t kuid, kgid_t kgid) |
| 598 | { |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | static inline int sysfs_group_change_owner(struct kobject *kobj, |
| 603 | const struct attribute_group *groups, |
| 604 | kuid_t kuid, kgid_t kgid) |
| 605 | { |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | __printf(2, 3) |
| 610 | static inline int sysfs_emit(char *buf, const char *fmt, ...) |
| 611 | { |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | __printf(3, 4) |
| 616 | static inline int sysfs_emit_at(char *buf, int at, const char *fmt, ...) |
| 617 | { |
| 618 | return 0; |
| 619 | } |
| 620 | #endif /* CONFIG_SYSFS */ |
| 621 | |
| 622 | static inline int __must_check sysfs_create_file(struct kobject *kobj, |
| 623 | const struct attribute *attr) |
| 624 | { |
| 625 | return sysfs_create_file_ns(kobj, attr, NULL); |
| 626 | } |
| 627 | |
| 628 | static inline void sysfs_remove_file(struct kobject *kobj, |
| 629 | const struct attribute *attr) |
| 630 | { |
| 631 | sysfs_remove_file_ns(kobj, attr, NULL); |
| 632 | } |
| 633 | |
| 634 | static inline int sysfs_rename_link(struct kobject *kobj, struct kobject *target, |
| 635 | const char *old_name, const char *new_name) |
| 636 | { |
| 637 | return sysfs_rename_link_ns(kobj, target, old_name, new_name, NULL); |
| 638 | } |
| 639 | |
| 640 | static inline void sysfs_notify_dirent(struct kernfs_node *kn) |
| 641 | { |
| 642 | kernfs_notify(kn); |
| 643 | } |
| 644 | |
| 645 | static inline struct kernfs_node *sysfs_get_dirent(struct kernfs_node *parent, |
| 646 | const char *name) |
| 647 | { |
| 648 | return kernfs_find_and_get(parent, name); |
| 649 | } |
| 650 | |
| 651 | static inline struct kernfs_node *sysfs_get(struct kernfs_node *kn) |
| 652 | { |
| 653 | kernfs_get(kn); |
| 654 | return kn; |
| 655 | } |
| 656 | |
| 657 | static inline void sysfs_put(struct kernfs_node *kn) |
| 658 | { |
| 659 | kernfs_put(kn); |
| 660 | } |
| 661 | |
| 662 | #endif /* _SYSFS_H_ */ |