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10#include <linux/list.h>
11#include <linux/spinlock.h>
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/kmod.h>
15#include <linux/fs.h>
16#include <linux/kobject.h>
17#include <linux/sysfs.h>
18#include <linux/sysctl.h>
19#include <cluster/masklog.h>
20
21#include "ocfs2.h"
22#include "ocfs2_fs.h"
23#include "stackglue.h"
24#include "inode.h"
25
26#include "filecheck.h"
27
28
29
30
31
32static const char * const ocfs2_filecheck_errs[] = {
33 "SUCCESS",
34 "FAILED",
35 "INPROGRESS",
36 "READONLY",
37 "INJBD",
38 "INVALIDINO",
39 "BLOCKECC",
40 "BLOCKNO",
41 "VALIDFLAG",
42 "GENERATION",
43 "UNSUPPORTED"
44};
45
46struct ocfs2_filecheck_entry {
47 struct list_head fe_list;
48 unsigned long fe_ino;
49 unsigned int fe_type;
50 unsigned int fe_done:1;
51 unsigned int fe_status:31;
52};
53
54struct ocfs2_filecheck_args {
55 unsigned int fa_type;
56 union {
57 unsigned long fa_ino;
58 unsigned int fa_len;
59 };
60};
61
62static const char *
63ocfs2_filecheck_error(int errno)
64{
65 if (!errno)
66 return ocfs2_filecheck_errs[errno];
67
68 BUG_ON(errno < OCFS2_FILECHECK_ERR_START ||
69 errno > OCFS2_FILECHECK_ERR_END);
70 return ocfs2_filecheck_errs[errno - OCFS2_FILECHECK_ERR_START + 1];
71}
72
73static ssize_t ocfs2_filecheck_attr_show(struct kobject *kobj,
74 struct kobj_attribute *attr,
75 char *buf);
76static ssize_t ocfs2_filecheck_attr_store(struct kobject *kobj,
77 struct kobj_attribute *attr,
78 const char *buf, size_t count);
79static struct kobj_attribute ocfs2_filecheck_attr_chk =
80 __ATTR(check, S_IRUSR | S_IWUSR,
81 ocfs2_filecheck_attr_show,
82 ocfs2_filecheck_attr_store);
83static struct kobj_attribute ocfs2_filecheck_attr_fix =
84 __ATTR(fix, S_IRUSR | S_IWUSR,
85 ocfs2_filecheck_attr_show,
86 ocfs2_filecheck_attr_store);
87static struct kobj_attribute ocfs2_filecheck_attr_set =
88 __ATTR(set, S_IRUSR | S_IWUSR,
89 ocfs2_filecheck_attr_show,
90 ocfs2_filecheck_attr_store);
91static struct attribute *ocfs2_filecheck_attrs[] = {
92 &ocfs2_filecheck_attr_chk.attr,
93 &ocfs2_filecheck_attr_fix.attr,
94 &ocfs2_filecheck_attr_set.attr,
95 NULL
96};
97
98static void ocfs2_filecheck_release(struct kobject *kobj)
99{
100 struct ocfs2_filecheck_sysfs_entry *entry = container_of(kobj,
101 struct ocfs2_filecheck_sysfs_entry, fs_kobj);
102
103 complete(&entry->fs_kobj_unregister);
104}
105
106static ssize_t
107ocfs2_filecheck_show(struct kobject *kobj, struct attribute *attr, char *buf)
108{
109 ssize_t ret = -EIO;
110 struct kobj_attribute *kattr = container_of(attr,
111 struct kobj_attribute, attr);
112
113 kobject_get(kobj);
114 if (kattr->show)
115 ret = kattr->show(kobj, kattr, buf);
116 kobject_put(kobj);
117 return ret;
118}
119
120static ssize_t
121ocfs2_filecheck_store(struct kobject *kobj, struct attribute *attr,
122 const char *buf, size_t count)
123{
124 ssize_t ret = -EIO;
125 struct kobj_attribute *kattr = container_of(attr,
126 struct kobj_attribute, attr);
127
128 kobject_get(kobj);
129 if (kattr->store)
130 ret = kattr->store(kobj, kattr, buf, count);
131 kobject_put(kobj);
132 return ret;
133}
134
135static const struct sysfs_ops ocfs2_filecheck_ops = {
136 .show = ocfs2_filecheck_show,
137 .store = ocfs2_filecheck_store,
138};
139
140static struct kobj_type ocfs2_ktype_filecheck = {
141 .default_attrs = ocfs2_filecheck_attrs,
142 .sysfs_ops = &ocfs2_filecheck_ops,
143 .release = ocfs2_filecheck_release,
144};
145
146static void
147ocfs2_filecheck_sysfs_free(struct ocfs2_filecheck_sysfs_entry *entry)
148{
149 struct ocfs2_filecheck_entry *p;
150
151 spin_lock(&entry->fs_fcheck->fc_lock);
152 while (!list_empty(&entry->fs_fcheck->fc_head)) {
153 p = list_first_entry(&entry->fs_fcheck->fc_head,
154 struct ocfs2_filecheck_entry, fe_list);
155 list_del(&p->fe_list);
156 BUG_ON(!p->fe_done);
157 kfree(p);
158 }
159 spin_unlock(&entry->fs_fcheck->fc_lock);
160
161 kfree(entry->fs_fcheck);
162 entry->fs_fcheck = NULL;
163}
164
165int ocfs2_filecheck_create_sysfs(struct ocfs2_super *osb)
166{
167 int ret;
168 struct ocfs2_filecheck *fcheck;
169 struct ocfs2_filecheck_sysfs_entry *entry = &osb->osb_fc_ent;
170
171 fcheck = kmalloc(sizeof(struct ocfs2_filecheck), GFP_NOFS);
172 if (!fcheck)
173 return -ENOMEM;
174
175 INIT_LIST_HEAD(&fcheck->fc_head);
176 spin_lock_init(&fcheck->fc_lock);
177 fcheck->fc_max = OCFS2_FILECHECK_MINSIZE;
178 fcheck->fc_size = 0;
179 fcheck->fc_done = 0;
180
181 entry->fs_kobj.kset = osb->osb_dev_kset;
182 init_completion(&entry->fs_kobj_unregister);
183 ret = kobject_init_and_add(&entry->fs_kobj, &ocfs2_ktype_filecheck,
184 NULL, "filecheck");
185 if (ret) {
186 kobject_put(&entry->fs_kobj);
187 kfree(fcheck);
188 return ret;
189 }
190
191 entry->fs_fcheck = fcheck;
192 return 0;
193}
194
195void ocfs2_filecheck_remove_sysfs(struct ocfs2_super *osb)
196{
197 if (!osb->osb_fc_ent.fs_fcheck)
198 return;
199
200 kobject_del(&osb->osb_fc_ent.fs_kobj);
201 kobject_put(&osb->osb_fc_ent.fs_kobj);
202 wait_for_completion(&osb->osb_fc_ent.fs_kobj_unregister);
203 ocfs2_filecheck_sysfs_free(&osb->osb_fc_ent);
204}
205
206static int
207ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent,
208 unsigned int count);
209static int
210ocfs2_filecheck_adjust_max(struct ocfs2_filecheck_sysfs_entry *ent,
211 unsigned int len)
212{
213 int ret;
214
215 if ((len < OCFS2_FILECHECK_MINSIZE) || (len > OCFS2_FILECHECK_MAXSIZE))
216 return -EINVAL;
217
218 spin_lock(&ent->fs_fcheck->fc_lock);
219 if (len < (ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done)) {
220 mlog(ML_NOTICE,
221 "Cannot set online file check maximum entry number "
222 "to %u due to too many pending entries(%u)\n",
223 len, ent->fs_fcheck->fc_size - ent->fs_fcheck->fc_done);
224 ret = -EBUSY;
225 } else {
226 if (len < ent->fs_fcheck->fc_size)
227 BUG_ON(!ocfs2_filecheck_erase_entries(ent,
228 ent->fs_fcheck->fc_size - len));
229
230 ent->fs_fcheck->fc_max = len;
231 ret = 0;
232 }
233 spin_unlock(&ent->fs_fcheck->fc_lock);
234
235 return ret;
236}
237
238#define OCFS2_FILECHECK_ARGS_LEN 24
239static int
240ocfs2_filecheck_args_get_long(const char *buf, size_t count,
241 unsigned long *val)
242{
243 char buffer[OCFS2_FILECHECK_ARGS_LEN];
244
245 memcpy(buffer, buf, count);
246 buffer[count] = '\0';
247
248 if (kstrtoul(buffer, 0, val))
249 return 1;
250
251 return 0;
252}
253
254static int
255ocfs2_filecheck_type_parse(const char *name, unsigned int *type)
256{
257 if (!strncmp(name, "fix", 4))
258 *type = OCFS2_FILECHECK_TYPE_FIX;
259 else if (!strncmp(name, "check", 6))
260 *type = OCFS2_FILECHECK_TYPE_CHK;
261 else if (!strncmp(name, "set", 4))
262 *type = OCFS2_FILECHECK_TYPE_SET;
263 else
264 return 1;
265
266 return 0;
267}
268
269static int
270ocfs2_filecheck_args_parse(const char *name, const char *buf, size_t count,
271 struct ocfs2_filecheck_args *args)
272{
273 unsigned long val = 0;
274 unsigned int type;
275
276
277 if ((count < 1) || (count >= OCFS2_FILECHECK_ARGS_LEN))
278 return 1;
279
280 if (ocfs2_filecheck_type_parse(name, &type))
281 return 1;
282 if (ocfs2_filecheck_args_get_long(buf, count, &val))
283 return 1;
284
285 if (val <= 0)
286 return 1;
287
288 args->fa_type = type;
289 if (type == OCFS2_FILECHECK_TYPE_SET)
290 args->fa_len = (unsigned int)val;
291 else
292 args->fa_ino = val;
293
294 return 0;
295}
296
297static ssize_t ocfs2_filecheck_attr_show(struct kobject *kobj,
298 struct kobj_attribute *attr,
299 char *buf)
300{
301
302 ssize_t ret = 0, total = 0, remain = PAGE_SIZE;
303 unsigned int type;
304 struct ocfs2_filecheck_entry *p;
305 struct ocfs2_filecheck_sysfs_entry *ent = container_of(kobj,
306 struct ocfs2_filecheck_sysfs_entry, fs_kobj);
307
308 if (ocfs2_filecheck_type_parse(attr->attr.name, &type))
309 return -EINVAL;
310
311 if (type == OCFS2_FILECHECK_TYPE_SET) {
312 spin_lock(&ent->fs_fcheck->fc_lock);
313 total = snprintf(buf, remain, "%u\n", ent->fs_fcheck->fc_max);
314 spin_unlock(&ent->fs_fcheck->fc_lock);
315 goto exit;
316 }
317
318 ret = snprintf(buf, remain, "INO\t\tDONE\tERROR\n");
319 total += ret;
320 remain -= ret;
321 spin_lock(&ent->fs_fcheck->fc_lock);
322 list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
323 if (p->fe_type != type)
324 continue;
325
326 ret = snprintf(buf + total, remain, "%lu\t\t%u\t%s\n",
327 p->fe_ino, p->fe_done,
328 ocfs2_filecheck_error(p->fe_status));
329 if (ret >= remain) {
330
331 total = -E2BIG;
332 break;
333 }
334 total += ret;
335 remain -= ret;
336 }
337 spin_unlock(&ent->fs_fcheck->fc_lock);
338
339exit:
340 return total;
341}
342
343static inline int
344ocfs2_filecheck_is_dup_entry(struct ocfs2_filecheck_sysfs_entry *ent,
345 unsigned long ino)
346{
347 struct ocfs2_filecheck_entry *p;
348
349 list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
350 if (!p->fe_done) {
351 if (p->fe_ino == ino)
352 return 1;
353 }
354 }
355
356 return 0;
357}
358
359static inline int
360ocfs2_filecheck_erase_entry(struct ocfs2_filecheck_sysfs_entry *ent)
361{
362 struct ocfs2_filecheck_entry *p;
363
364 list_for_each_entry(p, &ent->fs_fcheck->fc_head, fe_list) {
365 if (p->fe_done) {
366 list_del(&p->fe_list);
367 kfree(p);
368 ent->fs_fcheck->fc_size--;
369 ent->fs_fcheck->fc_done--;
370 return 1;
371 }
372 }
373
374 return 0;
375}
376
377static int
378ocfs2_filecheck_erase_entries(struct ocfs2_filecheck_sysfs_entry *ent,
379 unsigned int count)
380{
381 unsigned int i = 0;
382 unsigned int ret = 0;
383
384 while (i++ < count) {
385 if (ocfs2_filecheck_erase_entry(ent))
386 ret++;
387 else
388 break;
389 }
390
391 return (ret == count ? 1 : 0);
392}
393
394static void
395ocfs2_filecheck_done_entry(struct ocfs2_filecheck_sysfs_entry *ent,
396 struct ocfs2_filecheck_entry *entry)
397{
398 spin_lock(&ent->fs_fcheck->fc_lock);
399 entry->fe_done = 1;
400 ent->fs_fcheck->fc_done++;
401 spin_unlock(&ent->fs_fcheck->fc_lock);
402}
403
404static unsigned int
405ocfs2_filecheck_handle(struct ocfs2_super *osb,
406 unsigned long ino, unsigned int flags)
407{
408 unsigned int ret = OCFS2_FILECHECK_ERR_SUCCESS;
409 struct inode *inode = NULL;
410 int rc;
411
412 inode = ocfs2_iget(osb, ino, flags, 0);
413 if (IS_ERR(inode)) {
414 rc = (int)(-(long)inode);
415 if (rc >= OCFS2_FILECHECK_ERR_START &&
416 rc < OCFS2_FILECHECK_ERR_END)
417 ret = rc;
418 else
419 ret = OCFS2_FILECHECK_ERR_FAILED;
420 } else
421 iput(inode);
422
423 return ret;
424}
425
426static void
427ocfs2_filecheck_handle_entry(struct ocfs2_filecheck_sysfs_entry *ent,
428 struct ocfs2_filecheck_entry *entry)
429{
430 struct ocfs2_super *osb = container_of(ent, struct ocfs2_super,
431 osb_fc_ent);
432
433 if (entry->fe_type == OCFS2_FILECHECK_TYPE_CHK)
434 entry->fe_status = ocfs2_filecheck_handle(osb,
435 entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_CHK);
436 else if (entry->fe_type == OCFS2_FILECHECK_TYPE_FIX)
437 entry->fe_status = ocfs2_filecheck_handle(osb,
438 entry->fe_ino, OCFS2_FI_FLAG_FILECHECK_FIX);
439 else
440 entry->fe_status = OCFS2_FILECHECK_ERR_UNSUPPORTED;
441
442 ocfs2_filecheck_done_entry(ent, entry);
443}
444
445static ssize_t ocfs2_filecheck_attr_store(struct kobject *kobj,
446 struct kobj_attribute *attr,
447 const char *buf, size_t count)
448{
449 ssize_t ret = 0;
450 struct ocfs2_filecheck_args args;
451 struct ocfs2_filecheck_entry *entry;
452 struct ocfs2_filecheck_sysfs_entry *ent = container_of(kobj,
453 struct ocfs2_filecheck_sysfs_entry, fs_kobj);
454
455 if (count == 0)
456 return count;
457
458 if (ocfs2_filecheck_args_parse(attr->attr.name, buf, count, &args))
459 return -EINVAL;
460
461 if (args.fa_type == OCFS2_FILECHECK_TYPE_SET) {
462 ret = ocfs2_filecheck_adjust_max(ent, args.fa_len);
463 goto exit;
464 }
465
466 entry = kmalloc(sizeof(struct ocfs2_filecheck_entry), GFP_NOFS);
467 if (!entry) {
468 ret = -ENOMEM;
469 goto exit;
470 }
471
472 spin_lock(&ent->fs_fcheck->fc_lock);
473 if (ocfs2_filecheck_is_dup_entry(ent, args.fa_ino)) {
474 ret = -EEXIST;
475 kfree(entry);
476 } else if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
477 (ent->fs_fcheck->fc_done == 0)) {
478 mlog(ML_NOTICE,
479 "Cannot do more file check "
480 "since file check queue(%u) is full now\n",
481 ent->fs_fcheck->fc_max);
482 ret = -EAGAIN;
483 kfree(entry);
484 } else {
485 if ((ent->fs_fcheck->fc_size >= ent->fs_fcheck->fc_max) &&
486 (ent->fs_fcheck->fc_done > 0)) {
487
488
489
490
491 BUG_ON(!ocfs2_filecheck_erase_entry(ent));
492 }
493
494 entry->fe_ino = args.fa_ino;
495 entry->fe_type = args.fa_type;
496 entry->fe_done = 0;
497 entry->fe_status = OCFS2_FILECHECK_ERR_INPROGRESS;
498 list_add_tail(&entry->fe_list, &ent->fs_fcheck->fc_head);
499 ent->fs_fcheck->fc_size++;
500 }
501 spin_unlock(&ent->fs_fcheck->fc_lock);
502
503 if (!ret)
504 ocfs2_filecheck_handle_entry(ent, entry);
505
506exit:
507 return (!ret ? count : ret);
508}
509
