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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * filecheck.c | |
5 | * | |
6 | * Code which implements online file check. | |
7 | * | |
8 | * Copyright (C) 2016 SuSE. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation, version 2. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | */ | |
19 | ||
20 | #include <linux/list.h> | |
21 | #include <linux/spinlock.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/kmod.h> | |
25 | #include <linux/fs.h> | |
26 | #include <linux/kobject.h> | |
27 | #include <linux/sysfs.h> | |
28 | #include <linux/sysctl.h> | |
29 | #include <cluster/masklog.h> | |
30 | ||
31 | #include "ocfs2.h" | |
32 | #include "ocfs2_fs.h" | |
33 | #include "stackglue.h" | |
34 | #include "inode.h" | |
35 | ||
36 | #include "filecheck.h" | |
37 | ||
38 | ||
39 | /* File check error strings, | |
40 | * must correspond with error number in header file. | |
41 | */ | |
42 | static const char * const ocfs2_filecheck_errs[] = { | |
43 | "SUCCESS", | |
44 | "FAILED", | |
45 | "INPROGRESS", | |
46 | "READONLY", | |
47 | "INJBD", | |
48 | "INVALIDINO", | |
49 | "BLOCKECC", | |
50 | "BLOCKNO", | |
51 | "VALIDFLAG", | |
52 | "GENERATION", | |
53 | "UNSUPPORTED" | |
54 | }; | |
55 | ||
56 | static DEFINE_SPINLOCK(ocfs2_filecheck_sysfs_lock); | |
57 | static LIST_HEAD(ocfs2_filecheck_sysfs_list); | |
58 | ||
59 | struct ocfs2_filecheck { | |
60 | struct list_head fc_head; /* File check entry list head */ | |
61 | spinlock_t fc_lock; | |
62 | unsigned int fc_max; /* Maximum number of entry in list */ | |
63 | unsigned int fc_size; /* Current entry count in list */ | |
64 | unsigned int fc_done; /* Finished entry count in list */ | |
65 | }; | |
66 | ||
67 | struct ocfs2_filecheck_sysfs_entry { /* sysfs entry per mounting */ | |
68 | struct list_head fs_list; | |
69 | atomic_t fs_count; | |
70 | struct super_block *fs_sb; | |
71 | struct kset *fs_devicekset; | |
72 | struct kset *fs_fcheckkset; | |
73 | struct ocfs2_filecheck *fs_fcheck; | |
74 | }; | |
75 | ||
76 | #define OCFS2_FILECHECK_MAXSIZE 100 | |
77 | #define OCFS2_FILECHECK_MINSIZE 10 | |
78 | ||
79 | /* File check operation type */ | |
80 | enum { | |
81 | OCFS2_FILECHECK_TYPE_CHK = 0, /* Check a file(inode) */ | |
82 | OCFS2_FILECHECK_TYPE_FIX, /* Fix a file(inode) */ | |
83 | OCFS2_FILECHECK_TYPE_SET = 100 /* Set entry list maximum size */ | |
84 | }; | |
85 | ||
86 | struct ocfs2_filecheck_entry { | |
87 | struct list_head fe_list; | |
88 | unsigned long fe_ino; | |
89 | unsigned int fe_type; | |
90 | unsigned int fe_done:1; | |
91 | unsigned int fe_status:31; | |
92 | }; | |
93 | ||
94 | struct ocfs2_filecheck_args { | |
95 | unsigned int fa_type; | |
96 | union { | |
97 | unsigned long fa_ino; | |
98 | unsigned int fa_len; | |
99 | }; | |
100 | }; | |
101 | ||
102 | static const char * | |
103 | ocfs2_filecheck_error(int errno) | |
104 | { | |
105 | if (!errno) | |
106 | return ocfs2_filecheck_errs[errno]; | |
107 | ||
108 | BUG_ON(errno < OCFS2_FILECHECK_ERR_START || | |
109 | errno > OCFS2_FILECHECK_ERR_END); | |
110 | return ocfs2_filecheck_errs[errno - OCFS2_FILECHECK_ERR_START + 1]; | |
111 | } | |
112 | ||
113 | static ssize_t ocfs2_filecheck_show(struct kobject *kobj, | |
114 | struct kobj_attribute *attr, | |
115 | char *buf); | |
116 | static ssize_t ocfs2_filecheck_store(struct kobject *kobj, | |
117 | struct kobj_attribute *attr, | |
118 | const char *buf, size_t count); | |
119 | static struct kobj_attribute ocfs2_attr_filecheck_chk = | |
120 | __ATTR(check, S_IRUSR | S_IWUSR, | |
121 | ocfs2_filecheck_show, | |
122 | ocfs2_filecheck_store); | |
123 | static struct kobj_attribute ocfs2_attr_filecheck_fix = | |
124 | __ATTR(fix, S_IRUSR | S_IWUSR, | |
125 | ocfs2_filecheck_show, | |
126 | ocfs2_filecheck_store); | |
127 | static struct kobj_attribute ocfs2_attr_filecheck_set = | |
128 | __ATTR(set, S_IRUSR | S_IWUSR, | |
129 | ocfs2_filecheck_show, | |
130 | ocfs2_filecheck_store); | |
131 | ||
132 | static int ocfs2_filecheck_sysfs_wait(atomic_t *p) | |
133 | { | |
134 | schedule(); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static void | |
139 | ocfs2_filecheck_sysfs_free(struct ocfs2_filecheck_sysfs_entry *entry) | |
140 | { | |
141 | struct ocfs2_filecheck_entry *p; | |
142 | ||
143 | if (!atomic_dec_and_test(&entry->fs_count)) | |
144 | wait_on_atomic_t(&entry->fs_count, ocfs2_filecheck_sysfs_wait, | |
145 | TASK_UNINTERRUPTIBLE); | |
146 | ||
147 | spin_lock(&entry->fs_fcheck->fc_lock); | |
148 | while (!list_empty(&entry->fs_fcheck->fc_head)) { | |
149 | p = list_first_entry(&entry->fs_fcheck->fc_head, | |
150 | struct ocfs2_filecheck_entry, fe_list); | |
151 | list_del(&p->fe_list); | |
152 | BUG_ON(!p->fe_done); /* To free a undone file check entry */ | |
153 | kfree(p); | |
154 | } | |
155 | spin_unlock(&entry->fs_fcheck->fc_lock); | |
156 | ||
157 | kset_unregister(entry->fs_fcheckkset); | |
158 | kset_unregister(entry->fs_devicekset); | |
159 | kfree(entry->fs_fcheck); | |
160 | kfree(entry); | |
161 | } | |
162 | ||
163 | static void | |
164 | ocfs2_filecheck_sysfs_add(struct ocfs2_filecheck_sysfs_entry *entry) | |
165 | { | |
166 | spin_lock(&ocfs2_filecheck_sysfs_lock); | |
167 | list_add_tail(&entry->fs_list, &ocfs2_filecheck_sysfs_list); | |
168 | spin_unlock(&ocfs2_filecheck_sysfs_lock); | |
169 | } | |
170 | ||
171 | static int ocfs2_filecheck_sysfs_del(const char *devname) | |
172 | { | |
173 | struct ocfs2_filecheck_sysfs_entry *p; | |
174 | ||
175 | spin_lock(&ocfs2_filecheck_sysfs_lock); | |
176 | list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) { | |
177 | if (!strcmp(p->fs_sb->s_id, devname)) { | |
178 | list_del(&p->fs_list); | |
179 | spin_unlock(&ocfs2_filecheck_sysfs_lock); | |
180 | ocfs2_filecheck_sysfs_free(p); | |
181 | return 0; | |
182 | } | |
183 | } | |
184 | spin_unlock(&ocfs2_filecheck_sysfs_lock); | |
185 | return 1; | |
186 | } | |
187 | ||
188 | static void | |
189 | ocfs2_filecheck_sysfs_put(struct ocfs2_filecheck_sysfs_entry *entry) | |
190 | { | |
191 | if (atomic_dec_and_test(&entry->fs_count)) | |
192 | wake_up_atomic_t(&entry->fs_count); | |
193 | } | |
194 | ||
195 | static struct ocfs2_filecheck_sysfs_entry * | |
196 | ocfs2_filecheck_sysfs_get(const char *devname) | |
197 | { | |
198 | struct ocfs2_filecheck_sysfs_entry *p = NULL; | |
199 | ||
200 | spin_lock(&ocfs2_filecheck_sysfs_lock); | |
201 | list_for_each_entry(p, &ocfs2_filecheck_sysfs_list, fs_list) { | |
202 | if (!strcmp(p->fs_sb->s_id, devname)) { | |
203 | atomic_inc(&p->fs_count); | |
204 | spin_unlock(&ocfs2_filecheck_sysfs_lock); | |
205 | return p; | |
206 | } | |
207 | } | |
208 | spin_unlock(&ocfs2_filecheck_sysfs_lock); | |
209 | return NULL; | |
210 | } | |
211 | ||
212 | int ocfs2_filecheck_create_sysfs(struct super_block *sb) | |
213 | { | |
214 | int ret = 0; | |
215 | struct kset *device_kset = NULL; | |
216 | struct kset *fcheck_kset = NULL; | |
217 | struct ocfs2_filecheck *fcheck = NULL; | |
218 | struct ocfs2_filecheck_sysfs_entry *entry = NULL; | |
219 | struct attribute **attrs = NULL; | |
220 | struct attribute_group attrgp; | |
221 | ||
222 | if (!ocfs2_kset) | |
223 | return -ENOMEM; | |
224 | ||
225 | attrs = kmalloc(sizeof(struct attribute *) * 4, GFP_NOFS); | |
226 | if (!attrs) { | |
227 | ret = -ENOMEM; | |
228 | goto error; | |
229 | } else { | |
230 | attrs[0] = &ocfs2_attr_filecheck_chk.attr; | |
231 | attrs[1] = &ocfs2_attr_filecheck_fix.attr; | |
232 | attrs[2] = &ocfs2_attr_filecheck_set.attr; | |
233 | attrs[3] = NULL; | |
234 | memset(&attrgp, 0, sizeof(attrgp)); | |
235 | attrgp.attrs = attrs; | |
236 | } | |
237 | ||
238 | fcheck = kmalloc(sizeof(struct ocfs2_filecheck), GFP_NOFS); | |
239 | if (!fcheck) { | |
240 | ret = -ENOMEM; | |
241 | goto error; | |
242 | } else { | |
243 | INIT_LIST_HEAD(&fcheck->fc_head); | |
244 | spin_lock_init(&fcheck->fc_lock); | |
245 | fcheck->fc_max = OCFS2_FILECHECK_MINSIZE; | |
246 | fcheck->fc_size = 0; | |
247 | fcheck->fc_done = 0; | |
248 | } | |
249 | ||
250 | if (strlen(sb->s_id) <= 0) { | |
251 | mlog(ML_ERROR, | |
252 | "Cannot get device basename when create filecheck sysfs\n"); | |
253 | ret = -ENODEV; | |
254 | goto error; | |
255 | } | |
256 | ||
257 | device_kset = kset_create_and_add(sb->s_id, NULL, &ocfs2_kset->kobj); | |
258 | if (!device_kset) { | |
259 | ret = -ENOMEM; | |
260 | goto error; | |
261 | } | |
262 | ||
263 | fcheck_kset = kset_create_and_add("filecheck", NULL, | |
264 | &device_kset->kobj); | |
265 | if (!fcheck_kset) { | |
266 | ret = -ENOMEM; | |
267 | goto error; | |
268 | } | |
269 | ||
270 | ret = sysfs_create_group(&fcheck_kset->kobj, &attrgp); | |
271 | if (ret) | |
272 | goto error; | |
273 | ||
274 | entry = kmalloc(sizeof(struct ocfs2_filecheck_sysfs_entry), GFP_NOFS); | |
275 | if (!entry) { | |
276 | ret = -ENOMEM; | |
277 | goto error; | |
278 | } else { | |
279 | atomic_set(&entry->fs_count, 1); | |
280 | entry->fs_sb = sb; | |
281 | entry->fs_devicekset = device_kset; | |
282 | entry->fs_fcheckkset = fcheck_kset; | |
283 | entry->fs_fcheck = fcheck; | |
284 | ocfs2_filecheck_sysfs_add(entry); | |
285 | } | |
286 | ||
287 | kfree(attrs); | |
288 | return 0; | |
289 | ||
290 | error: | |
291 | kfree(attrs); | |
292 | kfree(entry); | |
293 | kfree(fcheck); | |
294 | kset_unregister(fcheck_kset); | |
295 | kset_unregister(device_kset); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | int ocfs2_filecheck_remove_sysfs(struct super_block *sb) | |
300 | { | |
301 | return ocfs2_filecheck_sysfs_del(sb->s_id); | |
302 | } | |
303 | ||
304 | static int | |
305 | ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent, | |
306 | unsigned int count); | |
307 | static int | |
308 | ocfs2_filecheck_adjust_max(struct ocfs2_filecheck_sysfs_entry *ent, | |
309 | unsigned int len) | |
310 | { | |
311 | int ret; | |
312 | ||
313 | if ((len < OCFS2_FILECHECK_MINSIZE) || (len > OCFS2_FILECHECK_MAXSIZE)) | |
314 | return -EINVAL; | |
315 | ||
316 | spin_lock(&ent->fs_fcheck->fc_lock); | |
317 | if (len < (ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done)) { | |
318 | mlog(ML_ERROR, | |
319 | "Cannot set online file check maximum entry number " | |
320 | "to %u due to too many pending entries(%u)\n", | |
321 | len, ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done); | |
322 | ret = -EBUSY; | |
323 | } else { | |
324 | if (len < ent->fs_fcheck->fc_size) | |
325 | BUG_ON(!ocfs2_filecheck_erase_entries(ent, | |
326 | ent->fs_fcheck->fc_size - len)); | |
327 | ||
328 | ent->fs_fcheck->fc_max = len; | |
329 | ret = 0; | |
330 | } | |
331 | spin_unlock(&ent->fs_fcheck->fc_lock); | |
332 | ||
333 | return ret; | |
334 | } | |
335 | ||
336 | #define OCFS2_FILECHECK_ARGS_LEN 24 | |
337 | static int | |
338 | ocfs2_filecheck_args_get_long(const char *buf, size_t count, | |
339 | unsigned long *val) | |
340 | { | |
341 | char buffer[OCFS2_FILECHECK_ARGS_LEN]; | |
342 | ||
343 | memcpy(buffer, buf, count); | |
344 | buffer[count] = '\0'; | |
345 | ||
346 | if (kstrtoul(buffer, 0, val)) | |
347 | return 1; | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | static int | |
353 | ocfs2_filecheck_type_parse(const char *name, unsigned int *type) | |
354 | { | |
355 | if (!strncmp(name, "fix", 4)) | |
356 | *type = OCFS2_FILECHECK_TYPE_FIX; | |
357 | else if (!strncmp(name, "check", 6)) | |
358 | *type = OCFS2_FILECHECK_TYPE_CHK; | |
359 | else if (!strncmp(name, "set", 4)) | |
360 | *type = OCFS2_FILECHECK_TYPE_SET; | |
361 | else | |
362 | return 1; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | static int | |
368 | ocfs2_filecheck_args_parse(const char *name, const char *buf, size_t count, | |
369 | struct ocfs2_filecheck_args *args) | |
370 | { | |
371 | unsigned long val = 0; | |
372 | unsigned int type; | |
373 | ||
374 | /* too short/long args length */ | |
375 | if ((count < 1) || (count >= OCFS2_FILECHECK_ARGS_LEN)) | |
376 | return 1; | |
377 | ||
378 | if (ocfs2_filecheck_type_parse(name, &type)) | |
379 | return 1; | |
380 | if (ocfs2_filecheck_args_get_long(buf, count, &val)) | |
381 | return 1; | |
382 | ||
383 | if (val <= 0) | |
384 | return 1; | |
385 | ||
386 | args->fa_type = type; | |
387 | if (type == OCFS2_FILECHECK_TYPE_SET) | |
388 | args->fa_len = (unsigned int)val; | |
389 | else | |
390 | args->fa_ino = val; | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static ssize_t ocfs2_filecheck_show(struct kobject *kobj, | |
396 | struct kobj_attribute *attr, | |
397 | char *buf) | |
398 | { | |
399 | ||
400 | ssize_t ret = 0, total = 0, remain = PAGE_SIZE; | |
401 | unsigned int type; | |
402 | struct ocfs2_filecheck_entry *p; | |
403 | struct ocfs2_filecheck_sysfs_entry *ent; | |
404 | ||
405 | if (ocfs2_filecheck_type_parse(attr->attr.name, &type)) | |
406 | return -EINVAL; | |
407 | ||
408 | ent = ocfs2_filecheck_sysfs_get(kobj->parent->name); | |
409 | if (!ent) { | |
410 | mlog(ML_ERROR, | |
411 | "Cannot get the corresponding entry via device basename %s\n", | |
412 | kobj->name); | |
413 | return -ENODEV; | |
414 | } | |
415 | ||
416 | if (type == OCFS2_FILECHECK_TYPE_SET) { | |
417 | spin_lock(&ent->fs_fcheck->fc_lock); | |
418 | total = snprintf(buf, remain, "%u\n", ent->fs_fcheck->fc_max); | |
419 | spin_unlock(&ent->fs_fcheck->fc_lock); | |
420 | goto exit; | |
421 | } | |
422 | ||
423 | ret = snprintf(buf, remain, "INO\t\tDONE\tERROR\n"); | |
424 | total += ret; | |
425 | remain -= ret; | |
426 | spin_lock(&ent->fs_fcheck->fc_lock); | |
427 | list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) { | |
428 | if (p->fe_type != type) | |
429 | continue; | |
430 | ||
431 | ret = snprintf(buf + total, remain, "%lu\t\t%u\t%s\n", | |
432 | p->fe_ino, p->fe_done, | |
433 | ocfs2_filecheck_error(p->fe_status)); | |
434 | if (ret < 0) { | |
435 | total = ret; | |
436 | break; | |
437 | } | |
438 | if (ret == remain) { | |
439 | /* snprintf() didn't fit */ | |
440 | total = -E2BIG; | |
441 | break; | |
442 | } | |
443 | total += ret; | |
444 | remain -= ret; | |
445 | } | |
446 | spin_unlock(&ent->fs_fcheck->fc_lock); | |
447 | ||
448 | exit: | |
449 | ocfs2_filecheck_sysfs_put(ent); | |
450 | return total; | |
451 | } | |
452 | ||
453 | static int | |
454 | ocfs2_filecheck_erase_entry(struct ocfs2_filecheck_sysfs_entry *ent) | |
455 | { | |
456 | struct ocfs2_filecheck_entry *p; | |
457 | ||
458 | list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) { | |
459 | if (p->fe_done) { | |
460 | list_del(&p->fe_list); | |
461 | kfree(p); | |
462 | ent->fs_fcheck->fc_size--; | |
463 | ent->fs_fcheck->fc_done--; | |
464 | return 1; | |
465 | } | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static int | |
472 | ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent, | |
473 | unsigned int count) | |
474 | { | |
475 | unsigned int i = 0; | |
476 | unsigned int ret = 0; | |
477 | ||
478 | while (i++ < count) { | |
479 | if (ocfs2_filecheck_erase_entry(ent)) | |
480 | ret++; | |
481 | else | |
482 | break; | |
483 | } | |
484 | ||
485 | return (ret == count ? 1 : 0); | |
486 | } | |
487 | ||
488 | static void | |
489 | ocfs2_filecheck_done_entry(struct ocfs2_filecheck_sysfs_entry *ent, | |
490 | struct ocfs2_filecheck_entry *entry) | |
491 | { | |
492 | entry->fe_done = 1; | |
493 | spin_lock(&ent->fs_fcheck->fc_lock); | |
494 | ent->fs_fcheck->fc_done++; | |
495 | spin_unlock(&ent->fs_fcheck->fc_lock); | |
496 | } | |
497 | ||
498 | static unsigned int | |
499 | ocfs2_filecheck_handle(struct super_block *sb, | |
500 | unsigned long ino, unsigned int flags) | |
501 | { | |
502 | unsigned int ret = OCFS2_FILECHECK_ERR_SUCCESS; | |
503 | struct inode *inode = NULL; | |
504 | int rc; | |
505 | ||
506 | inode = ocfs2_iget(OCFS2_SB(sb), ino, flags, 0); | |
507 | if (IS_ERR(inode)) { | |
508 | rc = (int)(-(long)inode); | |
509 | if (rc >= OCFS2_FILECHECK_ERR_START && | |
510 | rc < OCFS2_FILECHECK_ERR_END) | |
511 | ret = rc; | |
512 | else | |
513 | ret = OCFS2_FILECHECK_ERR_FAILED; | |
514 | } else | |
515 | iput(inode); | |
516 | ||
517 | return ret; | |
518 | } | |
519 | ||
520 | static void | |
521 | ocfs2_filecheck_handle_entry(struct ocfs2_filecheck_sysfs_entry *ent, | |
522 | struct ocfs2_filecheck_entry *entry) | |
523 | { | |
524 | if (entry->fe_type == OCFS2_FILECHECK_TYPE_CHK) | |
525 | entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb, | |
526 | entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_CHK); | |
527 | else if (entry->fe_type == OCFS2_FILECHECK_TYPE_FIX) | |
528 | entry->fe_status = ocfs2_filecheck_handle(ent->fs_sb, | |
529 | entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_FIX); | |
530 | else | |
531 | entry->fe_status = OCFS2_FILECHECK_ERR_UNSUPPORTED; | |
532 | ||
533 | ocfs2_filecheck_done_entry(ent, entry); | |
534 | } | |
535 | ||
536 | static ssize_t ocfs2_filecheck_store(struct kobject *kobj, | |
537 | struct kobj_attribute *attr, | |
538 | const char *buf, size_t count) | |
539 | { | |
540 | struct ocfs2_filecheck_args args; | |
541 | struct ocfs2_filecheck_entry *entry; | |
542 | struct ocfs2_filecheck_sysfs_entry *ent; | |
543 | ssize_t ret = 0; | |
544 | ||
545 | if (count == 0) | |
546 | return count; | |
547 | ||
548 | if (ocfs2_filecheck_args_parse(attr->attr.name, buf, count, &args)) { | |
549 | mlog(ML_ERROR, "Invalid arguments for online file check\n"); | |
550 | return -EINVAL; | |
551 | } | |
552 | ||
553 | ent = ocfs2_filecheck_sysfs_get(kobj->parent->name); | |
554 | if (!ent) { | |
555 | mlog(ML_ERROR, | |
556 | "Cannot get the corresponding entry via device basename %s\n", | |
557 | kobj->parent->name); | |
558 | return -ENODEV; | |
559 | } | |
560 | ||
561 | if (args.fa_type == OCFS2_FILECHECK_TYPE_SET) { | |
562 | ret = ocfs2_filecheck_adjust_max(ent, args.fa_len); | |
563 | goto exit; | |
564 | } | |
565 | ||
566 | entry = kmalloc(sizeof(struct ocfs2_filecheck_entry), GFP_NOFS); | |
567 | if (!entry) { | |
568 | ret = -ENOMEM; | |
569 | goto exit; | |
570 | } | |
571 | ||
572 | spin_lock(&ent->fs_fcheck->fc_lock); | |
573 | if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) && | |
574 | (ent->fs_fcheck->fc_done == 0)) { | |
575 | mlog(ML_ERROR, | |
576 | "Cannot do more file check " | |
577 | "since file check queue(%u) is full now\n", | |
578 | ent->fs_fcheck->fc_max); | |
579 | ret = -EBUSY; | |
580 | kfree(entry); | |
581 | } else { | |
582 | if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) && | |
583 | (ent->fs_fcheck->fc_done > 0)) { | |
584 | /* Delete the oldest entry which was done, | |
585 | * make sure the entry size in list does | |
586 | * not exceed maximum value | |
587 | */ | |
588 | BUG_ON(!ocfs2_filecheck_erase_entry(ent)); | |
589 | } | |
590 | ||
591 | entry->fe_ino = args.fa_ino; | |
592 | entry->fe_type = args.fa_type; | |
593 | entry->fe_done = 0; | |
594 | entry->fe_status = OCFS2_FILECHECK_ERR_INPROGRESS; | |
595 | list_add_tail(&entry->fe_list, &ent->fs_fcheck->fc_head); | |
596 | ent->fs_fcheck->fc_size++; | |
597 | } | |
598 | spin_unlock(&ent->fs_fcheck->fc_lock); | |
599 | ||
600 | if (!ret) | |
601 | ocfs2_filecheck_handle_entry(ent, entry); | |
602 | ||
603 | exit: | |
604 | ocfs2_filecheck_sysfs_put(ent); | |
605 | return (!ret ? count : ret); | |
606 | } |