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7063fbf2 JB |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * file.c - operations for regular (text) files. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public | |
17 | * License along with this program; if not, write to the | |
18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | * Boston, MA 021110-1307, USA. | |
20 | * | |
21 | * Based on sysfs: | |
22 | * sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel | |
23 | * | |
24 | * configfs Copyright (C) 2005 Oracle. All rights reserved. | |
25 | */ | |
26 | ||
27 | #include <linux/fs.h> | |
28 | #include <linux/module.h> | |
7063fbf2 | 29 | #include <linux/slab.h> |
6d748924 | 30 | #include <linux/mutex.h> |
03607ace | 31 | #include <linux/vmalloc.h> |
7c0f6ba6 | 32 | #include <linux/uaccess.h> |
7063fbf2 JB |
33 | |
34 | #include <linux/configfs.h> | |
35 | #include "configfs_internal.h" | |
36 | ||
b23cdde4 JB |
37 | /* |
38 | * A simple attribute can only be 4096 characters. Why 4k? Because the | |
39 | * original code limited it to PAGE_SIZE. That's a bad idea, though, | |
40 | * because an attribute of 16k on ia64 won't work on x86. So we limit to | |
41 | * 4k, our minimum common page size. | |
42 | */ | |
43 | #define SIMPLE_ATTR_SIZE 4096 | |
7063fbf2 JB |
44 | |
45 | struct configfs_buffer { | |
46 | size_t count; | |
47 | loff_t pos; | |
48 | char * page; | |
49 | struct configfs_item_operations * ops; | |
6d748924 | 50 | struct mutex mutex; |
7063fbf2 | 51 | int needs_read_fill; |
03607ace PA |
52 | bool read_in_progress; |
53 | bool write_in_progress; | |
54 | char *bin_buffer; | |
55 | int bin_buffer_size; | |
33f5f3e6 AV |
56 | int cb_max_size; |
57 | struct config_item *item; | |
58 | struct module *owner; | |
59 | union { | |
60 | struct configfs_attribute *attr; | |
61 | struct configfs_bin_attribute *bin_attr; | |
62 | }; | |
7063fbf2 JB |
63 | }; |
64 | ||
65 | ||
33f5f3e6 | 66 | static int fill_read_buffer(struct configfs_buffer * buffer) |
7063fbf2 | 67 | { |
7063fbf2 JB |
68 | ssize_t count; |
69 | ||
70 | if (!buffer->page) | |
71 | buffer->page = (char *) get_zeroed_page(GFP_KERNEL); | |
72 | if (!buffer->page) | |
73 | return -ENOMEM; | |
74 | ||
33f5f3e6 AV |
75 | count = buffer->attr->show(buffer->item, buffer->page); |
76 | if (count < 0) | |
77 | return count; | |
78 | if (WARN_ON_ONCE(count > (ssize_t)SIMPLE_ATTR_SIZE)) | |
79 | return -EIO; | |
870823e6 | 80 | |
33f5f3e6 AV |
81 | buffer->needs_read_fill = 0; |
82 | buffer->count = count; | |
83 | return 0; | |
7063fbf2 JB |
84 | } |
85 | ||
7063fbf2 JB |
86 | /** |
87 | * configfs_read_file - read an attribute. | |
88 | * @file: file pointer. | |
89 | * @buf: buffer to fill. | |
90 | * @count: number of bytes to read. | |
91 | * @ppos: starting offset in file. | |
92 | * | |
93 | * Userspace wants to read an attribute file. The attribute descriptor | |
94 | * is in the file's ->d_fsdata. The target item is in the directory's | |
95 | * ->d_fsdata. | |
96 | * | |
97 | * We call fill_read_buffer() to allocate and fill the buffer from the | |
98 | * item's show() method exactly once (if the read is happening from | |
99 | * the beginning of the file). That should fill the entire buffer with | |
100 | * all the data the item has to offer for that attribute. | |
101 | * We then call flush_read_buffer() to copy the buffer to userspace | |
102 | * in the increments specified. | |
103 | */ | |
104 | ||
105 | static ssize_t | |
106 | configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
107 | { | |
33f5f3e6 | 108 | struct configfs_buffer *buffer = file->private_data; |
7063fbf2 JB |
109 | ssize_t retval = 0; |
110 | ||
6d748924 | 111 | mutex_lock(&buffer->mutex); |
7063fbf2 | 112 | if (buffer->needs_read_fill) { |
33f5f3e6 AV |
113 | retval = fill_read_buffer(buffer); |
114 | if (retval) | |
7063fbf2 JB |
115 | goto out; |
116 | } | |
4779efca | 117 | pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n", |
8e24eea7 | 118 | __func__, count, *ppos, buffer->page); |
92f4c701 AM |
119 | retval = simple_read_from_buffer(buf, count, ppos, buffer->page, |
120 | buffer->count); | |
7063fbf2 | 121 | out: |
6d748924 | 122 | mutex_unlock(&buffer->mutex); |
7063fbf2 JB |
123 | return retval; |
124 | } | |
125 | ||
03607ace PA |
126 | /** |
127 | * configfs_read_bin_file - read a binary attribute. | |
128 | * @file: file pointer. | |
129 | * @buf: buffer to fill. | |
130 | * @count: number of bytes to read. | |
131 | * @ppos: starting offset in file. | |
132 | * | |
133 | * Userspace wants to read a binary attribute file. The attribute | |
134 | * descriptor is in the file's ->d_fsdata. The target item is in the | |
135 | * directory's ->d_fsdata. | |
136 | * | |
137 | * We check whether we need to refill the buffer. If so we will | |
138 | * call the attributes' attr->read() twice. The first time we | |
139 | * will pass a NULL as a buffer pointer, which the attributes' method | |
140 | * will use to return the size of the buffer required. If no error | |
141 | * occurs we will allocate the buffer using vmalloc and call | |
142 | * attr->read() again passing that buffer as an argument. | |
143 | * Then we just copy to user-space using simple_read_from_buffer. | |
144 | */ | |
145 | ||
146 | static ssize_t | |
147 | configfs_read_bin_file(struct file *file, char __user *buf, | |
148 | size_t count, loff_t *ppos) | |
149 | { | |
150 | struct configfs_buffer *buffer = file->private_data; | |
03607ace PA |
151 | ssize_t retval = 0; |
152 | ssize_t len = min_t(size_t, count, PAGE_SIZE); | |
153 | ||
154 | mutex_lock(&buffer->mutex); | |
155 | ||
156 | /* we don't support switching read/write modes */ | |
157 | if (buffer->write_in_progress) { | |
158 | retval = -ETXTBSY; | |
159 | goto out; | |
160 | } | |
3f6928c3 | 161 | buffer->read_in_progress = true; |
03607ace PA |
162 | |
163 | if (buffer->needs_read_fill) { | |
164 | /* perform first read with buf == NULL to get extent */ | |
33f5f3e6 | 165 | len = buffer->bin_attr->read(buffer->item, NULL, 0); |
03607ace PA |
166 | if (len <= 0) { |
167 | retval = len; | |
168 | goto out; | |
169 | } | |
170 | ||
171 | /* do not exceed the maximum value */ | |
33f5f3e6 | 172 | if (buffer->cb_max_size && len > buffer->cb_max_size) { |
03607ace PA |
173 | retval = -EFBIG; |
174 | goto out; | |
175 | } | |
176 | ||
177 | buffer->bin_buffer = vmalloc(len); | |
178 | if (buffer->bin_buffer == NULL) { | |
179 | retval = -ENOMEM; | |
180 | goto out; | |
181 | } | |
182 | buffer->bin_buffer_size = len; | |
183 | ||
184 | /* perform second read to fill buffer */ | |
33f5f3e6 AV |
185 | len = buffer->bin_attr->read(buffer->item, |
186 | buffer->bin_buffer, len); | |
03607ace PA |
187 | if (len < 0) { |
188 | retval = len; | |
189 | vfree(buffer->bin_buffer); | |
190 | buffer->bin_buffer_size = 0; | |
191 | buffer->bin_buffer = NULL; | |
192 | goto out; | |
193 | } | |
194 | ||
195 | buffer->needs_read_fill = 0; | |
196 | } | |
197 | ||
198 | retval = simple_read_from_buffer(buf, count, ppos, buffer->bin_buffer, | |
199 | buffer->bin_buffer_size); | |
200 | out: | |
201 | mutex_unlock(&buffer->mutex); | |
202 | return retval; | |
203 | } | |
204 | ||
7063fbf2 JB |
205 | |
206 | /** | |
207 | * fill_write_buffer - copy buffer from userspace. | |
208 | * @buffer: data buffer for file. | |
3d0f89bb | 209 | * @buf: data from user. |
7063fbf2 JB |
210 | * @count: number of bytes in @userbuf. |
211 | * | |
212 | * Allocate @buffer->page if it hasn't been already, then | |
213 | * copy the user-supplied buffer into it. | |
214 | */ | |
215 | ||
216 | static int | |
217 | fill_write_buffer(struct configfs_buffer * buffer, const char __user * buf, size_t count) | |
218 | { | |
219 | int error; | |
220 | ||
221 | if (!buffer->page) | |
ff05d1c4 | 222 | buffer->page = (char *)__get_free_pages(GFP_KERNEL, 0); |
7063fbf2 JB |
223 | if (!buffer->page) |
224 | return -ENOMEM; | |
225 | ||
b23cdde4 JB |
226 | if (count >= SIMPLE_ATTR_SIZE) |
227 | count = SIMPLE_ATTR_SIZE - 1; | |
7063fbf2 JB |
228 | error = copy_from_user(buffer->page,buf,count); |
229 | buffer->needs_read_fill = 1; | |
ff05d1c4 JB |
230 | /* if buf is assumed to contain a string, terminate it by \0, |
231 | * so e.g. sscanf() can scan the string easily */ | |
232 | buffer->page[count] = 0; | |
7063fbf2 JB |
233 | return error ? -EFAULT : count; |
234 | } | |
235 | ||
7063fbf2 | 236 | static int |
33f5f3e6 | 237 | flush_write_buffer(struct configfs_buffer *buffer, size_t count) |
7063fbf2 | 238 | { |
33f5f3e6 | 239 | return buffer->attr->store(buffer->item, buffer->page, count); |
7063fbf2 JB |
240 | } |
241 | ||
242 | ||
243 | /** | |
244 | * configfs_write_file - write an attribute. | |
245 | * @file: file pointer | |
246 | * @buf: data to write | |
247 | * @count: number of bytes | |
248 | * @ppos: starting offset | |
249 | * | |
250 | * Similar to configfs_read_file(), though working in the opposite direction. | |
251 | * We allocate and fill the data from the user in fill_write_buffer(), | |
252 | * then push it to the config_item in flush_write_buffer(). | |
253 | * There is no easy way for us to know if userspace is only doing a partial | |
254 | * write, so we don't support them. We expect the entire buffer to come | |
255 | * on the first write. | |
256 | * Hint: if you're writing a value, first read the file, modify only the | |
257 | * the value you're changing, then write entire buffer back. | |
258 | */ | |
259 | ||
260 | static ssize_t | |
261 | configfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
262 | { | |
33f5f3e6 | 263 | struct configfs_buffer *buffer = file->private_data; |
3d0f89bb | 264 | ssize_t len; |
7063fbf2 | 265 | |
6d748924 | 266 | mutex_lock(&buffer->mutex); |
3d0f89bb JB |
267 | len = fill_write_buffer(buffer, buf, count); |
268 | if (len > 0) | |
33f5f3e6 | 269 | len = flush_write_buffer(buffer, len); |
3d0f89bb JB |
270 | if (len > 0) |
271 | *ppos += len; | |
6d748924 | 272 | mutex_unlock(&buffer->mutex); |
3d0f89bb | 273 | return len; |
7063fbf2 JB |
274 | } |
275 | ||
03607ace PA |
276 | /** |
277 | * configfs_write_bin_file - write a binary attribute. | |
278 | * @file: file pointer | |
279 | * @buf: data to write | |
280 | * @count: number of bytes | |
281 | * @ppos: starting offset | |
282 | * | |
283 | * Writing to a binary attribute file is similar to a normal read. | |
284 | * We buffer the consecutive writes (binary attribute files do not | |
285 | * support lseek) in a continuously growing buffer, but we don't | |
286 | * commit until the close of the file. | |
287 | */ | |
288 | ||
289 | static ssize_t | |
290 | configfs_write_bin_file(struct file *file, const char __user *buf, | |
291 | size_t count, loff_t *ppos) | |
292 | { | |
293 | struct configfs_buffer *buffer = file->private_data; | |
03607ace PA |
294 | void *tbuf = NULL; |
295 | ssize_t len; | |
296 | ||
297 | mutex_lock(&buffer->mutex); | |
298 | ||
299 | /* we don't support switching read/write modes */ | |
300 | if (buffer->read_in_progress) { | |
301 | len = -ETXTBSY; | |
302 | goto out; | |
303 | } | |
3f6928c3 | 304 | buffer->write_in_progress = true; |
03607ace PA |
305 | |
306 | /* buffer grows? */ | |
307 | if (*ppos + count > buffer->bin_buffer_size) { | |
308 | ||
33f5f3e6 AV |
309 | if (buffer->cb_max_size && |
310 | *ppos + count > buffer->cb_max_size) { | |
03607ace | 311 | len = -EFBIG; |
42857cf5 | 312 | goto out; |
03607ace PA |
313 | } |
314 | ||
315 | tbuf = vmalloc(*ppos + count); | |
316 | if (tbuf == NULL) { | |
317 | len = -ENOMEM; | |
318 | goto out; | |
319 | } | |
320 | ||
321 | /* copy old contents */ | |
322 | if (buffer->bin_buffer) { | |
323 | memcpy(tbuf, buffer->bin_buffer, | |
324 | buffer->bin_buffer_size); | |
325 | vfree(buffer->bin_buffer); | |
326 | } | |
327 | ||
328 | /* clear the new area */ | |
329 | memset(tbuf + buffer->bin_buffer_size, 0, | |
330 | *ppos + count - buffer->bin_buffer_size); | |
331 | buffer->bin_buffer = tbuf; | |
332 | buffer->bin_buffer_size = *ppos + count; | |
333 | } | |
334 | ||
335 | len = simple_write_to_buffer(buffer->bin_buffer, | |
336 | buffer->bin_buffer_size, ppos, buf, count); | |
03607ace PA |
337 | out: |
338 | mutex_unlock(&buffer->mutex); | |
339 | return len; | |
340 | } | |
341 | ||
33f5f3e6 | 342 | static int __configfs_open_file(struct inode *inode, struct file *file, int type) |
7063fbf2 | 343 | { |
33f5f3e6 AV |
344 | struct dentry *dentry = file->f_path.dentry; |
345 | struct configfs_attribute *attr; | |
346 | struct configfs_buffer *buffer; | |
347 | int error; | |
7063fbf2 | 348 | |
33f5f3e6 AV |
349 | error = -ENOMEM; |
350 | buffer = kzalloc(sizeof(struct configfs_buffer), GFP_KERNEL); | |
351 | if (!buffer) | |
352 | goto out; | |
7063fbf2 | 353 | |
33f5f3e6 AV |
354 | error = -EINVAL; |
355 | buffer->item = configfs_get_config_item(dentry->d_parent); | |
356 | if (!buffer->item) | |
357 | goto out_free_buffer; | |
358 | ||
359 | attr = to_attr(dentry); | |
360 | if (!attr) | |
361 | goto out_put_item; | |
362 | ||
363 | if (type & CONFIGFS_ITEM_BIN_ATTR) { | |
364 | buffer->bin_attr = to_bin_attr(dentry); | |
365 | buffer->cb_max_size = buffer->bin_attr->cb_max_size; | |
366 | } else { | |
367 | buffer->attr = attr; | |
368 | } | |
03607ace | 369 | |
33f5f3e6 | 370 | buffer->owner = attr->ca_owner; |
7063fbf2 | 371 | /* Grab the module reference for this attribute if we have one */ |
33f5f3e6 AV |
372 | error = -ENODEV; |
373 | if (!try_module_get(buffer->owner)) | |
374 | goto out_put_item; | |
7063fbf2 | 375 | |
33f5f3e6 AV |
376 | error = -EACCES; |
377 | if (!buffer->item->ci_type) | |
378 | goto out_put_module; | |
379 | ||
380 | buffer->ops = buffer->item->ci_type->ct_item_ops; | |
7063fbf2 JB |
381 | |
382 | /* File needs write support. | |
383 | * The inode's perms must say it's ok, | |
384 | * and we must have a store method. | |
385 | */ | |
386 | if (file->f_mode & FMODE_WRITE) { | |
03607ace | 387 | if (!(inode->i_mode & S_IWUGO)) |
33f5f3e6 | 388 | goto out_put_module; |
03607ace | 389 | if ((type & CONFIGFS_ITEM_ATTR) && !attr->store) |
33f5f3e6 AV |
390 | goto out_put_module; |
391 | if ((type & CONFIGFS_ITEM_BIN_ATTR) && !buffer->bin_attr->write) | |
392 | goto out_put_module; | |
7063fbf2 JB |
393 | } |
394 | ||
395 | /* File needs read support. | |
396 | * The inode's perms must say it's ok, and we there | |
397 | * must be a show method for it. | |
398 | */ | |
399 | if (file->f_mode & FMODE_READ) { | |
03607ace | 400 | if (!(inode->i_mode & S_IRUGO)) |
33f5f3e6 | 401 | goto out_put_module; |
03607ace | 402 | if ((type & CONFIGFS_ITEM_ATTR) && !attr->show) |
33f5f3e6 AV |
403 | goto out_put_module; |
404 | if ((type & CONFIGFS_ITEM_BIN_ATTR) && !buffer->bin_attr->read) | |
405 | goto out_put_module; | |
7063fbf2 JB |
406 | } |
407 | ||
6d748924 | 408 | mutex_init(&buffer->mutex); |
559c9ac3 | 409 | buffer->needs_read_fill = 1; |
3f6928c3 TM |
410 | buffer->read_in_progress = false; |
411 | buffer->write_in_progress = false; | |
559c9ac3 | 412 | file->private_data = buffer; |
33f5f3e6 | 413 | return 0; |
7063fbf2 | 414 | |
33f5f3e6 AV |
415 | out_put_module: |
416 | module_put(buffer->owner); | |
417 | out_put_item: | |
418 | config_item_put(buffer->item); | |
419 | out_free_buffer: | |
420 | kfree(buffer); | |
421 | out: | |
7063fbf2 JB |
422 | return error; |
423 | } | |
424 | ||
03607ace | 425 | static int configfs_release(struct inode *inode, struct file *filp) |
7063fbf2 | 426 | { |
33f5f3e6 AV |
427 | struct configfs_buffer *buffer = filp->private_data; |
428 | ||
429 | if (buffer->item) | |
430 | config_item_put(buffer->item); | |
431 | module_put(buffer->owner); | |
432 | if (buffer->page) | |
433 | free_page((unsigned long)buffer->page); | |
434 | mutex_destroy(&buffer->mutex); | |
435 | kfree(buffer); | |
7063fbf2 JB |
436 | return 0; |
437 | } | |
438 | ||
03607ace PA |
439 | static int configfs_open_file(struct inode *inode, struct file *filp) |
440 | { | |
33f5f3e6 | 441 | return __configfs_open_file(inode, filp, CONFIGFS_ITEM_ATTR); |
03607ace PA |
442 | } |
443 | ||
444 | static int configfs_open_bin_file(struct inode *inode, struct file *filp) | |
445 | { | |
33f5f3e6 | 446 | return __configfs_open_file(inode, filp, CONFIGFS_ITEM_BIN_ATTR); |
03607ace PA |
447 | } |
448 | ||
33f5f3e6 | 449 | static int configfs_release_bin_file(struct inode *inode, struct file *file) |
03607ace | 450 | { |
33f5f3e6 | 451 | struct configfs_buffer *buffer = file->private_data; |
03607ace | 452 | |
3f6928c3 | 453 | buffer->read_in_progress = false; |
03607ace PA |
454 | |
455 | if (buffer->write_in_progress) { | |
3f6928c3 | 456 | buffer->write_in_progress = false; |
03607ace | 457 | |
33f5f3e6 AV |
458 | /* result of ->release() is ignored */ |
459 | buffer->bin_attr->write(buffer->item, buffer->bin_buffer, | |
03607ace PA |
460 | buffer->bin_buffer_size); |
461 | ||
462 | /* vfree on NULL is safe */ | |
463 | vfree(buffer->bin_buffer); | |
464 | buffer->bin_buffer = NULL; | |
465 | buffer->bin_buffer_size = 0; | |
466 | buffer->needs_read_fill = 1; | |
467 | } | |
468 | ||
33f5f3e6 AV |
469 | configfs_release(inode, file); |
470 | return 0; | |
03607ace PA |
471 | } |
472 | ||
473 | ||
4b6f5d20 | 474 | const struct file_operations configfs_file_operations = { |
7063fbf2 JB |
475 | .read = configfs_read_file, |
476 | .write = configfs_write_file, | |
477 | .llseek = generic_file_llseek, | |
478 | .open = configfs_open_file, | |
479 | .release = configfs_release, | |
480 | }; | |
481 | ||
03607ace PA |
482 | const struct file_operations configfs_bin_file_operations = { |
483 | .read = configfs_read_bin_file, | |
484 | .write = configfs_write_bin_file, | |
485 | .llseek = NULL, /* bin file is not seekable */ | |
486 | .open = configfs_open_bin_file, | |
487 | .release = configfs_release_bin_file, | |
488 | }; | |
489 | ||
7063fbf2 JB |
490 | /** |
491 | * configfs_create_file - create an attribute file for an item. | |
492 | * @item: item we're creating for. | |
493 | * @attr: atrribute descriptor. | |
494 | */ | |
495 | ||
496 | int configfs_create_file(struct config_item * item, const struct configfs_attribute * attr) | |
497 | { | |
28444a2b AV |
498 | struct dentry *dir = item->ci_dentry; |
499 | struct configfs_dirent *parent_sd = dir->d_fsdata; | |
500 | umode_t mode = (attr->ca_mode & S_IALLUGO) | S_IFREG; | |
501 | int error = 0; | |
7063fbf2 | 502 | |
5955102c | 503 | inode_lock_nested(d_inode(dir), I_MUTEX_NORMAL); |
28444a2b | 504 | error = configfs_make_dirent(parent_sd, NULL, (void *) attr, mode, |
ecb0c8cd | 505 | CONFIGFS_ITEM_ATTR, parent_sd->s_frag); |
5955102c | 506 | inode_unlock(d_inode(dir)); |
28444a2b AV |
507 | |
508 | return error; | |
7063fbf2 JB |
509 | } |
510 | ||
03607ace PA |
511 | /** |
512 | * configfs_create_bin_file - create a binary attribute file for an item. | |
513 | * @item: item we're creating for. | |
514 | * @attr: atrribute descriptor. | |
515 | */ | |
516 | ||
517 | int configfs_create_bin_file(struct config_item *item, | |
518 | const struct configfs_bin_attribute *bin_attr) | |
519 | { | |
520 | struct dentry *dir = item->ci_dentry; | |
521 | struct configfs_dirent *parent_sd = dir->d_fsdata; | |
522 | umode_t mode = (bin_attr->cb_attr.ca_mode & S_IALLUGO) | S_IFREG; | |
523 | int error = 0; | |
524 | ||
5955102c | 525 | inode_lock_nested(dir->d_inode, I_MUTEX_NORMAL); |
03607ace | 526 | error = configfs_make_dirent(parent_sd, NULL, (void *) bin_attr, mode, |
ecb0c8cd | 527 | CONFIGFS_ITEM_BIN_ATTR, parent_sd->s_frag); |
5955102c | 528 | inode_unlock(dir->d_inode); |
03607ace PA |
529 | |
530 | return error; | |
531 | } |