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29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/module.h>
32#include <linux/ctype.h>
33#include <linux/kthread.h>
34#include <linux/parser.h>
35#include <linux/seq_file.h>
36#include <linux/mount.h>
37#include <linux/math64.h>
38#include <linux/writeback.h>
39#include "ubifs.h"
40
41
42
43
44
45#define UBIFS_KMALLOC_OK (128*1024)
46
47
48static struct kmem_cache *ubifs_inode_slab;
49
50
51static struct shrinker ubifs_shrinker_info = {
52 .scan_objects = ubifs_shrink_scan,
53 .count_objects = ubifs_shrink_count,
54 .seeks = DEFAULT_SEEKS,
55};
56
57
58
59
60
61
62
63
64
65
66
67static int validate_inode(struct ubifs_info *c, const struct inode *inode)
68{
69 int err;
70 const struct ubifs_inode *ui = ubifs_inode(inode);
71
72 if (inode->i_size > c->max_inode_sz) {
73 ubifs_err(c, "inode is too large (%lld)",
74 (long long)inode->i_size);
75 return 1;
76 }
77
78 if (ui->compr_type >= UBIFS_COMPR_TYPES_CNT) {
79 ubifs_err(c, "unknown compression type %d", ui->compr_type);
80 return 2;
81 }
82
83 if (ui->xattr_names + ui->xattr_cnt > XATTR_LIST_MAX)
84 return 3;
85
86 if (ui->data_len < 0 || ui->data_len > UBIFS_MAX_INO_DATA)
87 return 4;
88
89 if (ui->xattr && !S_ISREG(inode->i_mode))
90 return 5;
91
92 if (!ubifs_compr_present(ui->compr_type)) {
93 ubifs_warn(c, "inode %lu uses '%s' compression, but it was not compiled in",
94 inode->i_ino, ubifs_compr_name(ui->compr_type));
95 }
96
97 err = dbg_check_dir(c, inode);
98 return err;
99}
100
101struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
102{
103 int err;
104 union ubifs_key key;
105 struct ubifs_ino_node *ino;
106 struct ubifs_info *c = sb->s_fs_info;
107 struct inode *inode;
108 struct ubifs_inode *ui;
109
110 dbg_gen("inode %lu", inum);
111
112 inode = iget_locked(sb, inum);
113 if (!inode)
114 return ERR_PTR(-ENOMEM);
115 if (!(inode->i_state & I_NEW))
116 return inode;
117 ui = ubifs_inode(inode);
118
119 ino = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
120 if (!ino) {
121 err = -ENOMEM;
122 goto out;
123 }
124
125 ino_key_init(c, &key, inode->i_ino);
126
127 err = ubifs_tnc_lookup(c, &key, ino);
128 if (err)
129 goto out_ino;
130
131 inode->i_flags |= S_NOCMTIME;
132#ifndef CONFIG_UBIFS_ATIME_SUPPORT
133 inode->i_flags |= S_NOATIME;
134#endif
135 set_nlink(inode, le32_to_cpu(ino->nlink));
136 i_uid_write(inode, le32_to_cpu(ino->uid));
137 i_gid_write(inode, le32_to_cpu(ino->gid));
138 inode->i_atime.tv_sec = (int64_t)le64_to_cpu(ino->atime_sec);
139 inode->i_atime.tv_nsec = le32_to_cpu(ino->atime_nsec);
140 inode->i_mtime.tv_sec = (int64_t)le64_to_cpu(ino->mtime_sec);
141 inode->i_mtime.tv_nsec = le32_to_cpu(ino->mtime_nsec);
142 inode->i_ctime.tv_sec = (int64_t)le64_to_cpu(ino->ctime_sec);
143 inode->i_ctime.tv_nsec = le32_to_cpu(ino->ctime_nsec);
144 inode->i_mode = le32_to_cpu(ino->mode);
145 inode->i_size = le64_to_cpu(ino->size);
146
147 ui->data_len = le32_to_cpu(ino->data_len);
148 ui->flags = le32_to_cpu(ino->flags);
149 ui->compr_type = le16_to_cpu(ino->compr_type);
150 ui->creat_sqnum = le64_to_cpu(ino->creat_sqnum);
151 ui->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
152 ui->xattr_size = le32_to_cpu(ino->xattr_size);
153 ui->xattr_names = le32_to_cpu(ino->xattr_names);
154 ui->synced_i_size = ui->ui_size = inode->i_size;
155
156 ui->xattr = (ui->flags & UBIFS_XATTR_FL) ? 1 : 0;
157
158 err = validate_inode(c, inode);
159 if (err)
160 goto out_invalid;
161
162 switch (inode->i_mode & S_IFMT) {
163 case S_IFREG:
164 inode->i_mapping->a_ops = &ubifs_file_address_operations;
165 inode->i_op = &ubifs_file_inode_operations;
166 inode->i_fop = &ubifs_file_operations;
167 if (ui->xattr) {
168 ui->data = kmalloc(ui->data_len + 1, GFP_NOFS);
169 if (!ui->data) {
170 err = -ENOMEM;
171 goto out_ino;
172 }
173 memcpy(ui->data, ino->data, ui->data_len);
174 ((char *)ui->data)[ui->data_len] = '\0';
175 } else if (ui->data_len != 0) {
176 err = 10;
177 goto out_invalid;
178 }
179 break;
180 case S_IFDIR:
181 inode->i_op = &ubifs_dir_inode_operations;
182 inode->i_fop = &ubifs_dir_operations;
183 if (ui->data_len != 0) {
184 err = 11;
185 goto out_invalid;
186 }
187 break;
188 case S_IFLNK:
189 inode->i_op = &ubifs_symlink_inode_operations;
190 if (ui->data_len <= 0 || ui->data_len > UBIFS_MAX_INO_DATA) {
191 err = 12;
192 goto out_invalid;
193 }
194 ui->data = kmalloc(ui->data_len + 1, GFP_NOFS);
195 if (!ui->data) {
196 err = -ENOMEM;
197 goto out_ino;
198 }
199 memcpy(ui->data, ino->data, ui->data_len);
200 ((char *)ui->data)[ui->data_len] = '\0';
201 break;
202 case S_IFBLK:
203 case S_IFCHR:
204 {
205 dev_t rdev;
206 union ubifs_dev_desc *dev;
207
208 ui->data = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
209 if (!ui->data) {
210 err = -ENOMEM;
211 goto out_ino;
212 }
213
214 dev = (union ubifs_dev_desc *)ino->data;
215 if (ui->data_len == sizeof(dev->new))
216 rdev = new_decode_dev(le32_to_cpu(dev->new));
217 else if (ui->data_len == sizeof(dev->huge))
218 rdev = huge_decode_dev(le64_to_cpu(dev->huge));
219 else {
220 err = 13;
221 goto out_invalid;
222 }
223 memcpy(ui->data, ino->data, ui->data_len);
224 inode->i_op = &ubifs_file_inode_operations;
225 init_special_inode(inode, inode->i_mode, rdev);
226 break;
227 }
228 case S_IFSOCK:
229 case S_IFIFO:
230 inode->i_op = &ubifs_file_inode_operations;
231 init_special_inode(inode, inode->i_mode, 0);
232 if (ui->data_len != 0) {
233 err = 14;
234 goto out_invalid;
235 }
236 break;
237 default:
238 err = 15;
239 goto out_invalid;
240 }
241
242 kfree(ino);
243 ubifs_set_inode_flags(inode);
244 unlock_new_inode(inode);
245 return inode;
246
247out_invalid:
248 ubifs_err(c, "inode %lu validation failed, error %d", inode->i_ino, err);
249 ubifs_dump_node(c, ino);
250 ubifs_dump_inode(c, inode);
251 err = -EINVAL;
252out_ino:
253 kfree(ino);
254out:
255 ubifs_err(c, "failed to read inode %lu, error %d", inode->i_ino, err);
256 iget_failed(inode);
257 return ERR_PTR(err);
258}
259
260static struct inode *ubifs_alloc_inode(struct super_block *sb)
261{
262 struct ubifs_inode *ui;
263
264 ui = kmem_cache_alloc(ubifs_inode_slab, GFP_NOFS);
265 if (!ui)
266 return NULL;
267
268 memset((void *)ui + sizeof(struct inode), 0,
269 sizeof(struct ubifs_inode) - sizeof(struct inode));
270 mutex_init(&ui->ui_mutex);
271 spin_lock_init(&ui->ui_lock);
272 return &ui->vfs_inode;
273};
274
275static void ubifs_i_callback(struct rcu_head *head)
276{
277 struct inode *inode = container_of(head, struct inode, i_rcu);
278 struct ubifs_inode *ui = ubifs_inode(inode);
279 kmem_cache_free(ubifs_inode_slab, ui);
280}
281
282static void ubifs_destroy_inode(struct inode *inode)
283{
284 struct ubifs_inode *ui = ubifs_inode(inode);
285
286 kfree(ui->data);
287 call_rcu(&inode->i_rcu, ubifs_i_callback);
288}
289
290
291
292
293static int ubifs_write_inode(struct inode *inode, struct writeback_control *wbc)
294{
295 int err = 0;
296 struct ubifs_info *c = inode->i_sb->s_fs_info;
297 struct ubifs_inode *ui = ubifs_inode(inode);
298
299 ubifs_assert(!ui->xattr);
300 if (is_bad_inode(inode))
301 return 0;
302
303 mutex_lock(&ui->ui_mutex);
304
305
306
307
308
309
310
311 if (!ui->dirty) {
312 mutex_unlock(&ui->ui_mutex);
313 return 0;
314 }
315
316
317
318
319
320 dbg_gen("inode %lu, mode %#x, nlink %u",
321 inode->i_ino, (int)inode->i_mode, inode->i_nlink);
322 if (inode->i_nlink) {
323 err = ubifs_jnl_write_inode(c, inode);
324 if (err)
325 ubifs_err(c, "can't write inode %lu, error %d",
326 inode->i_ino, err);
327 else
328 err = dbg_check_inode_size(c, inode, ui->ui_size);
329 }
330
331 ui->dirty = 0;
332 mutex_unlock(&ui->ui_mutex);
333 ubifs_release_dirty_inode_budget(c, ui);
334 return err;
335}
336
337static void ubifs_evict_inode(struct inode *inode)
338{
339 int err;
340 struct ubifs_info *c = inode->i_sb->s_fs_info;
341 struct ubifs_inode *ui = ubifs_inode(inode);
342
343 if (ui->xattr)
344
345
346
347
348
349 goto out;
350
351 dbg_gen("inode %lu, mode %#x", inode->i_ino, (int)inode->i_mode);
352 ubifs_assert(!atomic_read(&inode->i_count));
353
354 truncate_inode_pages_final(&inode->i_data);
355
356 if (inode->i_nlink)
357 goto done;
358
359 if (is_bad_inode(inode))
360 goto out;
361
362 ui->ui_size = inode->i_size = 0;
363 err = ubifs_jnl_delete_inode(c, inode);
364 if (err)
365
366
367
368
369 ubifs_err(c, "can't delete inode %lu, error %d",
370 inode->i_ino, err);
371
372out:
373 if (ui->dirty)
374 ubifs_release_dirty_inode_budget(c, ui);
375 else {
376
377 c->bi.nospace = c->bi.nospace_rp = 0;
378 smp_wmb();
379 }
380done:
381 clear_inode(inode);
382 fscrypt_put_encryption_info(inode);
383}
384
385static void ubifs_dirty_inode(struct inode *inode, int flags)
386{
387 struct ubifs_inode *ui = ubifs_inode(inode);
388
389 ubifs_assert(mutex_is_locked(&ui->ui_mutex));
390 if (!ui->dirty) {
391 ui->dirty = 1;
392 dbg_gen("inode %lu", inode->i_ino);
393 }
394}
395
396static int ubifs_statfs(struct dentry *dentry, struct kstatfs *buf)
397{
398 struct ubifs_info *c = dentry->d_sb->s_fs_info;
399 unsigned long long free;
400 __le32 *uuid = (__le32 *)c->uuid;
401
402 free = ubifs_get_free_space(c);
403 dbg_gen("free space %lld bytes (%lld blocks)",
404 free, free >> UBIFS_BLOCK_SHIFT);
405
406 buf->f_type = UBIFS_SUPER_MAGIC;
407 buf->f_bsize = UBIFS_BLOCK_SIZE;
408 buf->f_blocks = c->block_cnt;
409 buf->f_bfree = free >> UBIFS_BLOCK_SHIFT;
410 if (free > c->report_rp_size)
411 buf->f_bavail = (free - c->report_rp_size) >> UBIFS_BLOCK_SHIFT;
412 else
413 buf->f_bavail = 0;
414 buf->f_files = 0;
415 buf->f_ffree = 0;
416 buf->f_namelen = UBIFS_MAX_NLEN;
417 buf->f_fsid.val[0] = le32_to_cpu(uuid[0]) ^ le32_to_cpu(uuid[2]);
418 buf->f_fsid.val[1] = le32_to_cpu(uuid[1]) ^ le32_to_cpu(uuid[3]);
419 ubifs_assert(buf->f_bfree <= c->block_cnt);
420 return 0;
421}
422
423static int ubifs_show_options(struct seq_file *s, struct dentry *root)
424{
425 struct ubifs_info *c = root->d_sb->s_fs_info;
426
427 if (c->mount_opts.unmount_mode == 2)
428 seq_puts(s, ",fast_unmount");
429 else if (c->mount_opts.unmount_mode == 1)
430 seq_puts(s, ",norm_unmount");
431
432 if (c->mount_opts.bulk_read == 2)
433 seq_puts(s, ",bulk_read");
434 else if (c->mount_opts.bulk_read == 1)
435 seq_puts(s, ",no_bulk_read");
436
437 if (c->mount_opts.chk_data_crc == 2)
438 seq_puts(s, ",chk_data_crc");
439 else if (c->mount_opts.chk_data_crc == 1)
440 seq_puts(s, ",no_chk_data_crc");
441
442 if (c->mount_opts.override_compr) {
443 seq_printf(s, ",compr=%s",
444 ubifs_compr_name(c->mount_opts.compr_type));
445 }
446
447 seq_printf(s, ",ubi=%d,vol=%d", c->vi.ubi_num, c->vi.vol_id);
448
449 return 0;
450}
451
452static int ubifs_sync_fs(struct super_block *sb, int wait)
453{
454 int i, err;
455 struct ubifs_info *c = sb->s_fs_info;
456
457
458
459
460
461
462 if (!wait)
463 return 0;
464
465
466
467
468
469 for (i = 0; i < c->jhead_cnt; i++) {
470 err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
471 if (err)
472 return err;
473 }
474
475
476
477
478
479
480
481
482 err = ubifs_run_commit(c);
483 if (err)
484 return err;
485
486 return ubi_sync(c->vi.ubi_num);
487}
488
489
490
491
492
493
494
495
496
497
498static int init_constants_early(struct ubifs_info *c)
499{
500 if (c->vi.corrupted) {
501 ubifs_warn(c, "UBI volume is corrupted - read-only mode");
502 c->ro_media = 1;
503 }
504
505 if (c->di.ro_mode) {
506 ubifs_msg(c, "read-only UBI device");
507 c->ro_media = 1;
508 }
509
510 if (c->vi.vol_type == UBI_STATIC_VOLUME) {
511 ubifs_msg(c, "static UBI volume - read-only mode");
512 c->ro_media = 1;
513 }
514
515 c->leb_cnt = c->vi.size;
516 c->leb_size = c->vi.usable_leb_size;
517 c->leb_start = c->di.leb_start;
518 c->half_leb_size = c->leb_size / 2;
519 c->min_io_size = c->di.min_io_size;
520 c->min_io_shift = fls(c->min_io_size) - 1;
521 c->max_write_size = c->di.max_write_size;
522 c->max_write_shift = fls(c->max_write_size) - 1;
523
524 if (c->leb_size < UBIFS_MIN_LEB_SZ) {
525 ubifs_errc(c, "too small LEBs (%d bytes), min. is %d bytes",
526 c->leb_size, UBIFS_MIN_LEB_SZ);
527 return -EINVAL;
528 }
529
530 if (c->leb_cnt < UBIFS_MIN_LEB_CNT) {
531 ubifs_errc(c, "too few LEBs (%d), min. is %d",
532 c->leb_cnt, UBIFS_MIN_LEB_CNT);
533 return -EINVAL;
534 }
535
536 if (!is_power_of_2(c->min_io_size)) {
537 ubifs_errc(c, "bad min. I/O size %d", c->min_io_size);
538 return -EINVAL;
539 }
540
541
542
543
544
545 if (c->max_write_size < c->min_io_size ||
546 c->max_write_size % c->min_io_size ||
547 !is_power_of_2(c->max_write_size)) {
548 ubifs_errc(c, "bad write buffer size %d for %d min. I/O unit",
549 c->max_write_size, c->min_io_size);
550 return -EINVAL;
551 }
552
553
554
555
556
557
558 if (c->min_io_size < 8) {
559 c->min_io_size = 8;
560 c->min_io_shift = 3;
561 if (c->max_write_size < c->min_io_size) {
562 c->max_write_size = c->min_io_size;
563 c->max_write_shift = c->min_io_shift;
564 }
565 }
566
567 c->ref_node_alsz = ALIGN(UBIFS_REF_NODE_SZ, c->min_io_size);
568 c->mst_node_alsz = ALIGN(UBIFS_MST_NODE_SZ, c->min_io_size);
569
570
571
572
573
574 c->ranges[UBIFS_PAD_NODE].len = UBIFS_PAD_NODE_SZ;
575 c->ranges[UBIFS_SB_NODE].len = UBIFS_SB_NODE_SZ;
576 c->ranges[UBIFS_MST_NODE].len = UBIFS_MST_NODE_SZ;
577 c->ranges[UBIFS_REF_NODE].len = UBIFS_REF_NODE_SZ;
578 c->ranges[UBIFS_TRUN_NODE].len = UBIFS_TRUN_NODE_SZ;
579 c->ranges[UBIFS_CS_NODE].len = UBIFS_CS_NODE_SZ;
580
581 c->ranges[UBIFS_INO_NODE].min_len = UBIFS_INO_NODE_SZ;
582 c->ranges[UBIFS_INO_NODE].max_len = UBIFS_MAX_INO_NODE_SZ;
583 c->ranges[UBIFS_ORPH_NODE].min_len =
584 UBIFS_ORPH_NODE_SZ + sizeof(__le64);
585 c->ranges[UBIFS_ORPH_NODE].max_len = c->leb_size;
586 c->ranges[UBIFS_DENT_NODE].min_len = UBIFS_DENT_NODE_SZ;
587 c->ranges[UBIFS_DENT_NODE].max_len = UBIFS_MAX_DENT_NODE_SZ;
588 c->ranges[UBIFS_XENT_NODE].min_len = UBIFS_XENT_NODE_SZ;
589 c->ranges[UBIFS_XENT_NODE].max_len = UBIFS_MAX_XENT_NODE_SZ;
590 c->ranges[UBIFS_DATA_NODE].min_len = UBIFS_DATA_NODE_SZ;
591 c->ranges[UBIFS_DATA_NODE].max_len = UBIFS_MAX_DATA_NODE_SZ;
592
593
594
595
596 c->ranges[UBIFS_IDX_NODE].min_len = UBIFS_IDX_NODE_SZ + UBIFS_BRANCH_SZ;
597
598
599
600
601 c->ranges[UBIFS_IDX_NODE].max_len = INT_MAX;
602
603
604
605
606
607 c->dead_wm = ALIGN(MIN_WRITE_SZ, c->min_io_size);
608 c->dark_wm = ALIGN(UBIFS_MAX_NODE_SZ, c->min_io_size);
609
610
611
612
613
614
615 c->leb_overhead = c->leb_size % UBIFS_MAX_DATA_NODE_SZ;
616
617
618 c->max_bu_buf_len = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ;
619 if (c->max_bu_buf_len > c->leb_size)
620 c->max_bu_buf_len = c->leb_size;
621 return 0;
622}
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639static int bud_wbuf_callback(struct ubifs_info *c, int lnum, int free, int pad)
640{
641 return ubifs_update_one_lp(c, lnum, free, pad, 0, 0);
642}
643
644
645
646
647
648
649
650
651
652
653static int init_constants_sb(struct ubifs_info *c)
654{
655 int tmp, err;
656 long long tmp64;
657
658 c->main_bytes = (long long)c->main_lebs * c->leb_size;
659 c->max_znode_sz = sizeof(struct ubifs_znode) +
660 c->fanout * sizeof(struct ubifs_zbranch);
661
662 tmp = ubifs_idx_node_sz(c, 1);
663 c->ranges[UBIFS_IDX_NODE].min_len = tmp;
664 c->min_idx_node_sz = ALIGN(tmp, 8);
665
666 tmp = ubifs_idx_node_sz(c, c->fanout);
667 c->ranges[UBIFS_IDX_NODE].max_len = tmp;
668 c->max_idx_node_sz = ALIGN(tmp, 8);
669
670
671 tmp = UBIFS_CS_NODE_SZ + UBIFS_REF_NODE_SZ * c->jhead_cnt;
672 tmp = ALIGN(tmp, c->min_io_size);
673 if (tmp > c->leb_size) {
674 ubifs_err(c, "too small LEB size %d, at least %d needed",
675 c->leb_size, tmp);
676 return -EINVAL;
677 }
678
679
680
681
682
683 tmp64 = c->max_bud_bytes + c->leb_size - 1;
684 c->max_bud_cnt = div_u64(tmp64, c->leb_size);
685 tmp = (c->ref_node_alsz * c->max_bud_cnt + c->leb_size - 1);
686 tmp /= c->leb_size;
687 tmp += 1;
688 if (c->log_lebs < tmp) {
689 ubifs_err(c, "too small log %d LEBs, required min. %d LEBs",
690 c->log_lebs, tmp);
691 return -EINVAL;
692 }
693
694
695
696
697
698
699
700
701 c->bi.page_budget = UBIFS_MAX_DATA_NODE_SZ * UBIFS_BLOCKS_PER_PAGE;
702 c->bi.inode_budget = UBIFS_INO_NODE_SZ;
703 c->bi.dent_budget = UBIFS_MAX_DENT_NODE_SZ;
704
705
706
707
708
709
710
711
712 c->bg_bud_bytes = (c->max_bud_bytes * 13) >> 4;
713
714
715
716
717
718
719
720 tmp64 = (long long)(c->jhead_cnt + 1) * c->leb_size + 1;
721 if (c->bg_bud_bytes < tmp64)
722 c->bg_bud_bytes = tmp64;
723 if (c->max_bud_bytes < tmp64 + c->leb_size)
724 c->max_bud_bytes = tmp64 + c->leb_size;
725
726 err = ubifs_calc_lpt_geom(c);
727 if (err)
728 return err;
729
730
731 c->idx_leb_size = c->leb_size - c->max_idx_node_sz;
732 return 0;
733}
734
735
736
737
738
739
740
741
742
743static void init_constants_master(struct ubifs_info *c)
744{
745 long long tmp64;
746
747 c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
748 c->report_rp_size = ubifs_reported_space(c, c->rp_size);
749
750
751
752
753
754
755
756
757
758
759 tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt + 1;
760 tmp64 *= (long long)c->leb_size - c->leb_overhead;
761 tmp64 = ubifs_reported_space(c, tmp64);
762 c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT;
763}
764
765
766
767
768
769
770
771
772
773
774
775
776static int take_gc_lnum(struct ubifs_info *c)
777{
778 int err;
779
780 if (c->gc_lnum == -1) {
781 ubifs_err(c, "no LEB for GC");
782 return -EINVAL;
783 }
784
785
786 err = ubifs_change_one_lp(c, c->gc_lnum, c->leb_size, 0,
787 LPROPS_TAKEN, 0, 0);
788 return err;
789}
790
791
792
793
794
795
796
797
798static int alloc_wbufs(struct ubifs_info *c)
799{
800 int i, err;
801
802 c->jheads = kcalloc(c->jhead_cnt, sizeof(struct ubifs_jhead),
803 GFP_KERNEL);
804 if (!c->jheads)
805 return -ENOMEM;
806
807
808 for (i = 0; i < c->jhead_cnt; i++) {
809 INIT_LIST_HEAD(&c->jheads[i].buds_list);
810 err = ubifs_wbuf_init(c, &c->jheads[i].wbuf);
811 if (err)
812 return err;
813
814 c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
815 c->jheads[i].wbuf.jhead = i;
816 c->jheads[i].grouped = 1;
817 }
818
819
820
821
822
823 c->jheads[GCHD].wbuf.no_timer = 1;
824 c->jheads[GCHD].grouped = 0;
825
826 return 0;
827}
828
829
830
831
832
833static void free_wbufs(struct ubifs_info *c)
834{
835 int i;
836
837 if (c->jheads) {
838 for (i = 0; i < c->jhead_cnt; i++) {
839 kfree(c->jheads[i].wbuf.buf);
840 kfree(c->jheads[i].wbuf.inodes);
841 }
842 kfree(c->jheads);
843 c->jheads = NULL;
844 }
845}
846
847
848
849
850
851static void free_orphans(struct ubifs_info *c)
852{
853 struct ubifs_orphan *orph;
854
855 while (c->orph_dnext) {
856 orph = c->orph_dnext;
857 c->orph_dnext = orph->dnext;
858 list_del(&orph->list);
859 kfree(orph);
860 }
861
862 while (!list_empty(&c->orph_list)) {
863 orph = list_entry(c->orph_list.next, struct ubifs_orphan, list);
864 list_del(&orph->list);
865 kfree(orph);
866 ubifs_err(c, "orphan list not empty at unmount");
867 }
868
869 vfree(c->orph_buf);
870 c->orph_buf = NULL;
871}
872
873
874
875
876
877static void free_buds(struct ubifs_info *c)
878{
879 struct ubifs_bud *bud, *n;
880
881 rbtree_postorder_for_each_entry_safe(bud, n, &c->buds, rb)
882 kfree(bud);
883}
884
885
886
887
888
889
890
891
892
893
894static int check_volume_empty(struct ubifs_info *c)
895{
896 int lnum, err;
897
898 c->empty = 1;
899 for (lnum = 0; lnum < c->leb_cnt; lnum++) {
900 err = ubifs_is_mapped(c, lnum);
901 if (unlikely(err < 0))
902 return err;
903 if (err == 1) {
904 c->empty = 0;
905 break;
906 }
907
908 cond_resched();
909 }
910
911 return 0;
912}
913
914
915
916
917
918
919
920
921
922
923
924
925
926enum {
927 Opt_fast_unmount,
928 Opt_norm_unmount,
929 Opt_bulk_read,
930 Opt_no_bulk_read,
931 Opt_chk_data_crc,
932 Opt_no_chk_data_crc,
933 Opt_override_compr,
934 Opt_ignore,
935 Opt_err,
936};
937
938static const match_table_t tokens = {
939 {Opt_fast_unmount, "fast_unmount"},
940 {Opt_norm_unmount, "norm_unmount"},
941 {Opt_bulk_read, "bulk_read"},
942 {Opt_no_bulk_read, "no_bulk_read"},
943 {Opt_chk_data_crc, "chk_data_crc"},
944 {Opt_no_chk_data_crc, "no_chk_data_crc"},
945 {Opt_override_compr, "compr=%s"},
946 {Opt_ignore, "ubi=%s"},
947 {Opt_ignore, "vol=%s"},
948 {Opt_err, NULL},
949};
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964static int parse_standard_option(const char *option)
965{
966
967 pr_notice("UBIFS: parse %s\n", option);
968 if (!strcmp(option, "sync"))
969 return SB_SYNCHRONOUS;
970 return 0;
971}
972
973
974
975
976
977
978
979
980
981
982static int ubifs_parse_options(struct ubifs_info *c, char *options,
983 int is_remount)
984{
985 char *p;
986 substring_t args[MAX_OPT_ARGS];
987
988 if (!options)
989 return 0;
990
991 while ((p = strsep(&options, ","))) {
992 int token;
993
994 if (!*p)
995 continue;
996
997 token = match_token(p, tokens, args);
998 switch (token) {
999
1000
1001
1002
1003
1004 case Opt_fast_unmount:
1005 c->mount_opts.unmount_mode = 2;
1006 break;
1007 case Opt_norm_unmount:
1008 c->mount_opts.unmount_mode = 1;
1009 break;
1010 case Opt_bulk_read:
1011 c->mount_opts.bulk_read = 2;
1012 c->bulk_read = 1;
1013 break;
1014 case Opt_no_bulk_read:
1015 c->mount_opts.bulk_read = 1;
1016 c->bulk_read = 0;
1017 break;
1018 case Opt_chk_data_crc:
1019 c->mount_opts.chk_data_crc = 2;
1020 c->no_chk_data_crc = 0;
1021 break;
1022 case Opt_no_chk_data_crc:
1023 c->mount_opts.chk_data_crc = 1;
1024 c->no_chk_data_crc = 1;
1025 break;
1026 case Opt_override_compr:
1027 {
1028 char *name = match_strdup(&args[0]);
1029
1030 if (!name)
1031 return -ENOMEM;
1032 if (!strcmp(name, "none"))
1033 c->mount_opts.compr_type = UBIFS_COMPR_NONE;
1034 else if (!strcmp(name, "lzo"))
1035 c->mount_opts.compr_type = UBIFS_COMPR_LZO;
1036 else if (!strcmp(name, "zlib"))
1037 c->mount_opts.compr_type = UBIFS_COMPR_ZLIB;
1038 else {
1039 ubifs_err(c, "unknown compressor \"%s\"", name);
1040 kfree(name);
1041 return -EINVAL;
1042 }
1043 kfree(name);
1044 c->mount_opts.override_compr = 1;
1045 c->default_compr = c->mount_opts.compr_type;
1046 break;
1047 }
1048 case Opt_ignore:
1049 break;
1050 default:
1051 {
1052 unsigned long flag;
1053 struct super_block *sb = c->vfs_sb;
1054
1055 flag = parse_standard_option(p);
1056 if (!flag) {
1057 ubifs_err(c, "unrecognized mount option \"%s\" or missing value",
1058 p);
1059 return -EINVAL;
1060 }
1061 sb->s_flags |= flag;
1062 break;
1063 }
1064 }
1065 }
1066
1067 return 0;
1068}
1069
1070
1071
1072
1073
1074
1075
1076
1077static void destroy_journal(struct ubifs_info *c)
1078{
1079 while (!list_empty(&c->unclean_leb_list)) {
1080 struct ubifs_unclean_leb *ucleb;
1081
1082 ucleb = list_entry(c->unclean_leb_list.next,
1083 struct ubifs_unclean_leb, list);
1084 list_del(&ucleb->list);
1085 kfree(ucleb);
1086 }
1087 while (!list_empty(&c->old_buds)) {
1088 struct ubifs_bud *bud;
1089
1090 bud = list_entry(c->old_buds.next, struct ubifs_bud, list);
1091 list_del(&bud->list);
1092 kfree(bud);
1093 }
1094 ubifs_destroy_idx_gc(c);
1095 ubifs_destroy_size_tree(c);
1096 ubifs_tnc_close(c);
1097 free_buds(c);
1098}
1099
1100
1101
1102
1103
1104static void bu_init(struct ubifs_info *c)
1105{
1106 ubifs_assert(c->bulk_read == 1);
1107
1108 if (c->bu.buf)
1109 return;
1110
1111again:
1112 c->bu.buf = kmalloc(c->max_bu_buf_len, GFP_KERNEL | __GFP_NOWARN);
1113 if (!c->bu.buf) {
1114 if (c->max_bu_buf_len > UBIFS_KMALLOC_OK) {
1115 c->max_bu_buf_len = UBIFS_KMALLOC_OK;
1116 goto again;
1117 }
1118
1119
1120 ubifs_warn(c, "cannot allocate %d bytes of memory for bulk-read, disabling it",
1121 c->max_bu_buf_len);
1122 c->mount_opts.bulk_read = 1;
1123 c->bulk_read = 0;
1124 return;
1125 }
1126}
1127
1128
1129
1130
1131
1132
1133
1134
1135static int check_free_space(struct ubifs_info *c)
1136{
1137 ubifs_assert(c->dark_wm > 0);
1138 if (c->lst.total_free + c->lst.total_dirty < c->dark_wm) {
1139 ubifs_err(c, "insufficient free space to mount in R/W mode");
1140 ubifs_dump_budg(c, &c->bi);
1141 ubifs_dump_lprops(c);
1142 return -ENOSPC;
1143 }
1144 return 0;
1145}
1146
1147
1148
1149
1150
1151
1152
1153
1154static int mount_ubifs(struct ubifs_info *c)
1155{
1156 int err;
1157 long long x, y;
1158 size_t sz;
1159
1160 c->ro_mount = !!sb_rdonly(c->vfs_sb);
1161
1162 c->probing = !!(c->vfs_sb->s_flags & SB_SILENT);
1163
1164 err = init_constants_early(c);
1165 if (err)
1166 return err;
1167
1168 err = ubifs_debugging_init(c);
1169 if (err)
1170 return err;
1171
1172 err = check_volume_empty(c);
1173 if (err)
1174 goto out_free;
1175
1176 if (c->empty && (c->ro_mount || c->ro_media)) {
1177
1178
1179
1180
1181 ubifs_err(c, "can't format empty UBI volume: read-only %s",
1182 c->ro_media ? "UBI volume" : "mount");
1183 err = -EROFS;
1184 goto out_free;
1185 }
1186
1187 if (c->ro_media && !c->ro_mount) {
1188 ubifs_err(c, "cannot mount read-write - read-only media");
1189 err = -EROFS;
1190 goto out_free;
1191 }
1192
1193
1194
1195
1196
1197
1198 err = -ENOMEM;
1199 c->bottom_up_buf = kmalloc(BOTTOM_UP_HEIGHT * sizeof(int), GFP_KERNEL);
1200 if (!c->bottom_up_buf)
1201 goto out_free;
1202
1203 c->sbuf = vmalloc(c->leb_size);
1204 if (!c->sbuf)
1205 goto out_free;
1206
1207 if (!c->ro_mount) {
1208 c->ileb_buf = vmalloc(c->leb_size);
1209 if (!c->ileb_buf)
1210 goto out_free;
1211 }
1212
1213 if (c->bulk_read == 1)
1214 bu_init(c);
1215
1216 if (!c->ro_mount) {
1217 c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ + \
1218 UBIFS_CIPHER_BLOCK_SIZE,
1219 GFP_KERNEL);
1220 if (!c->write_reserve_buf)
1221 goto out_free;
1222 }
1223
1224 c->mounting = 1;
1225
1226 err = ubifs_read_superblock(c);
1227 if (err)
1228 goto out_free;
1229
1230 c->probing = 0;
1231
1232
1233
1234
1235
1236 if (!ubifs_compr_present(c->default_compr)) {
1237 ubifs_err(c, "'compressor \"%s\" is not compiled in",
1238 ubifs_compr_name(c->default_compr));
1239 err = -ENOTSUPP;
1240 goto out_free;
1241 }
1242
1243 err = init_constants_sb(c);
1244 if (err)
1245 goto out_free;
1246
1247 sz = ALIGN(c->max_idx_node_sz, c->min_io_size);
1248 sz = ALIGN(sz + c->max_idx_node_sz, c->min_io_size);
1249 c->cbuf = kmalloc(sz, GFP_NOFS);
1250 if (!c->cbuf) {
1251 err = -ENOMEM;
1252 goto out_free;
1253 }
1254
1255 err = alloc_wbufs(c);
1256 if (err)
1257 goto out_cbuf;
1258
1259 sprintf(c->bgt_name, BGT_NAME_PATTERN, c->vi.ubi_num, c->vi.vol_id);
1260 if (!c->ro_mount) {
1261
1262 c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
1263 if (IS_ERR(c->bgt)) {
1264 err = PTR_ERR(c->bgt);
1265 c->bgt = NULL;
1266 ubifs_err(c, "cannot spawn \"%s\", error %d",
1267 c->bgt_name, err);
1268 goto out_wbufs;
1269 }
1270 wake_up_process(c->bgt);
1271 }
1272
1273 err = ubifs_read_master(c);
1274 if (err)
1275 goto out_master;
1276
1277 init_constants_master(c);
1278
1279 if ((c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY)) != 0) {
1280 ubifs_msg(c, "recovery needed");
1281 c->need_recovery = 1;
1282 }
1283
1284 if (c->need_recovery && !c->ro_mount) {
1285 err = ubifs_recover_inl_heads(c, c->sbuf);
1286 if (err)
1287 goto out_master;
1288 }
1289
1290 err = ubifs_lpt_init(c, 1, !c->ro_mount);
1291 if (err)
1292 goto out_master;
1293
1294 if (!c->ro_mount && c->space_fixup) {
1295 err = ubifs_fixup_free_space(c);
1296 if (err)
1297 goto out_lpt;
1298 }
1299
1300 if (!c->ro_mount && !c->need_recovery) {
1301
1302
1303
1304
1305 c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
1306 err = ubifs_write_master(c);
1307 if (err)
1308 goto out_lpt;
1309 }
1310
1311 err = dbg_check_idx_size(c, c->bi.old_idx_sz);
1312 if (err)
1313 goto out_lpt;
1314
1315 err = ubifs_replay_journal(c);
1316 if (err)
1317 goto out_journal;
1318
1319
1320 c->bi.min_idx_lebs = ubifs_calc_min_idx_lebs(c);
1321
1322 err = ubifs_mount_orphans(c, c->need_recovery, c->ro_mount);
1323 if (err)
1324 goto out_orphans;
1325
1326 if (!c->ro_mount) {
1327 int lnum;
1328
1329 err = check_free_space(c);
1330 if (err)
1331 goto out_orphans;
1332
1333
1334 lnum = c->lhead_lnum + 1;
1335 if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
1336 lnum = UBIFS_LOG_LNUM;
1337 if (lnum == c->ltail_lnum) {
1338 err = ubifs_consolidate_log(c);
1339 if (err)
1340 goto out_orphans;
1341 }
1342
1343 if (c->need_recovery) {
1344 err = ubifs_recover_size(c);
1345 if (err)
1346 goto out_orphans;
1347 err = ubifs_rcvry_gc_commit(c);
1348 if (err)
1349 goto out_orphans;
1350 } else {
1351 err = take_gc_lnum(c);
1352 if (err)
1353 goto out_orphans;
1354
1355
1356
1357
1358
1359 err = ubifs_leb_unmap(c, c->gc_lnum);
1360 if (err)
1361 goto out_orphans;
1362 }
1363
1364 err = dbg_check_lprops(c);
1365 if (err)
1366 goto out_orphans;
1367 } else if (c->need_recovery) {
1368 err = ubifs_recover_size(c);
1369 if (err)
1370 goto out_orphans;
1371 } else {
1372
1373
1374
1375
1376
1377
1378 err = take_gc_lnum(c);
1379 if (err)
1380 goto out_orphans;
1381 }
1382
1383 spin_lock(&ubifs_infos_lock);
1384 list_add_tail(&c->infos_list, &ubifs_infos);
1385 spin_unlock(&ubifs_infos_lock);
1386
1387 if (c->need_recovery) {
1388 if (c->ro_mount)
1389 ubifs_msg(c, "recovery deferred");
1390 else {
1391 c->need_recovery = 0;
1392 ubifs_msg(c, "recovery completed");
1393
1394
1395
1396
1397
1398 ubifs_assert(c->lst.taken_empty_lebs > 0);
1399 }
1400 } else
1401 ubifs_assert(c->lst.taken_empty_lebs > 0);
1402
1403 err = dbg_check_filesystem(c);
1404 if (err)
1405 goto out_infos;
1406
1407 err = dbg_debugfs_init_fs(c);
1408 if (err)
1409 goto out_infos;
1410
1411 c->mounting = 0;
1412
1413 ubifs_msg(c, "UBIFS: mounted UBI device %d, volume %d, name \"%s\"%s",
1414 c->vi.ubi_num, c->vi.vol_id, c->vi.name,
1415 c->ro_mount ? ", R/O mode" : "");
1416 x = (long long)c->main_lebs * c->leb_size;
1417 y = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
1418 ubifs_msg(c, "LEB size: %d bytes (%d KiB), min./max. I/O unit sizes: %d bytes/%d bytes",
1419 c->leb_size, c->leb_size >> 10, c->min_io_size,
1420 c->max_write_size);
1421 ubifs_msg(c, "FS size: %lld bytes (%lld MiB, %d LEBs), journal size %lld bytes (%lld MiB, %d LEBs)",
1422 x, x >> 20, c->main_lebs,
1423 y, y >> 20, c->log_lebs + c->max_bud_cnt);
1424 ubifs_msg(c, "reserved for root: %llu bytes (%llu KiB)",
1425 c->report_rp_size, c->report_rp_size >> 10);
1426 ubifs_msg(c, "media format: w%d/r%d (latest is w%d/r%d), UUID %pUB%s",
1427 c->fmt_version, c->ro_compat_version,
1428 UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION, c->uuid,
1429 c->big_lpt ? ", big LPT model" : ", small LPT model");
1430
1431 dbg_gen("default compressor: %s", ubifs_compr_name(c->default_compr));
1432 dbg_gen("data journal heads: %d",
1433 c->jhead_cnt - NONDATA_JHEADS_CNT);
1434 dbg_gen("log LEBs: %d (%d - %d)",
1435 c->log_lebs, UBIFS_LOG_LNUM, c->log_last);
1436 dbg_gen("LPT area LEBs: %d (%d - %d)",
1437 c->lpt_lebs, c->lpt_first, c->lpt_last);
1438 dbg_gen("orphan area LEBs: %d (%d - %d)",
1439 c->orph_lebs, c->orph_first, c->orph_last);
1440 dbg_gen("main area LEBs: %d (%d - %d)",
1441 c->main_lebs, c->main_first, c->leb_cnt - 1);
1442 dbg_gen("index LEBs: %d", c->lst.idx_lebs);
1443 dbg_gen("total index bytes: %lld (%lld KiB, %lld MiB)",
1444 c->bi.old_idx_sz, c->bi.old_idx_sz >> 10,
1445 c->bi.old_idx_sz >> 20);
1446 dbg_gen("key hash type: %d", c->key_hash_type);
1447 dbg_gen("tree fanout: %d", c->fanout);
1448 dbg_gen("reserved GC LEB: %d", c->gc_lnum);
1449 dbg_gen("max. znode size %d", c->max_znode_sz);
1450 dbg_gen("max. index node size %d", c->max_idx_node_sz);
1451 dbg_gen("node sizes: data %zu, inode %zu, dentry %zu",
1452 UBIFS_DATA_NODE_SZ, UBIFS_INO_NODE_SZ, UBIFS_DENT_NODE_SZ);
1453 dbg_gen("node sizes: trun %zu, sb %zu, master %zu",
1454 UBIFS_TRUN_NODE_SZ, UBIFS_SB_NODE_SZ, UBIFS_MST_NODE_SZ);
1455 dbg_gen("node sizes: ref %zu, cmt. start %zu, orph %zu",
1456 UBIFS_REF_NODE_SZ, UBIFS_CS_NODE_SZ, UBIFS_ORPH_NODE_SZ);
1457 dbg_gen("max. node sizes: data %zu, inode %zu dentry %zu, idx %d",
1458 UBIFS_MAX_DATA_NODE_SZ, UBIFS_MAX_INO_NODE_SZ,
1459 UBIFS_MAX_DENT_NODE_SZ, ubifs_idx_node_sz(c, c->fanout));
1460 dbg_gen("dead watermark: %d", c->dead_wm);
1461 dbg_gen("dark watermark: %d", c->dark_wm);
1462 dbg_gen("LEB overhead: %d", c->leb_overhead);
1463 x = (long long)c->main_lebs * c->dark_wm;
1464 dbg_gen("max. dark space: %lld (%lld KiB, %lld MiB)",
1465 x, x >> 10, x >> 20);
1466 dbg_gen("maximum bud bytes: %lld (%lld KiB, %lld MiB)",
1467 c->max_bud_bytes, c->max_bud_bytes >> 10,
1468 c->max_bud_bytes >> 20);
1469 dbg_gen("BG commit bud bytes: %lld (%lld KiB, %lld MiB)",
1470 c->bg_bud_bytes, c->bg_bud_bytes >> 10,
1471 c->bg_bud_bytes >> 20);
1472 dbg_gen("current bud bytes %lld (%lld KiB, %lld MiB)",
1473 c->bud_bytes, c->bud_bytes >> 10, c->bud_bytes >> 20);
1474 dbg_gen("max. seq. number: %llu", c->max_sqnum);
1475 dbg_gen("commit number: %llu", c->cmt_no);
1476
1477 return 0;
1478
1479out_infos:
1480 spin_lock(&ubifs_infos_lock);
1481 list_del(&c->infos_list);
1482 spin_unlock(&ubifs_infos_lock);
1483out_orphans:
1484 free_orphans(c);
1485out_journal:
1486 destroy_journal(c);
1487out_lpt:
1488 ubifs_lpt_free(c, 0);
1489out_master:
1490 kfree(c->mst_node);
1491 kfree(c->rcvrd_mst_node);
1492 if (c->bgt)
1493 kthread_stop(c->bgt);
1494out_wbufs:
1495 free_wbufs(c);
1496out_cbuf:
1497 kfree(c->cbuf);
1498out_free:
1499 kfree(c->write_reserve_buf);
1500 kfree(c->bu.buf);
1501 vfree(c->ileb_buf);
1502 vfree(c->sbuf);
1503 kfree(c->bottom_up_buf);
1504 ubifs_debugging_exit(c);
1505 return err;
1506}
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517static void ubifs_umount(struct ubifs_info *c)
1518{
1519 dbg_gen("un-mounting UBI device %d, volume %d", c->vi.ubi_num,
1520 c->vi.vol_id);
1521
1522 dbg_debugfs_exit_fs(c);
1523 spin_lock(&ubifs_infos_lock);
1524 list_del(&c->infos_list);
1525 spin_unlock(&ubifs_infos_lock);
1526
1527 if (c->bgt)
1528 kthread_stop(c->bgt);
1529
1530 destroy_journal(c);
1531 free_wbufs(c);
1532 free_orphans(c);
1533 ubifs_lpt_free(c, 0);
1534
1535 kfree(c->cbuf);
1536 kfree(c->rcvrd_mst_node);
1537 kfree(c->mst_node);
1538 kfree(c->write_reserve_buf);
1539 kfree(c->bu.buf);
1540 vfree(c->ileb_buf);
1541 vfree(c->sbuf);
1542 kfree(c->bottom_up_buf);
1543 ubifs_debugging_exit(c);
1544}
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554static int ubifs_remount_rw(struct ubifs_info *c)
1555{
1556 int err, lnum;
1557
1558 if (c->rw_incompat) {
1559 ubifs_err(c, "the file-system is not R/W-compatible");
1560 ubifs_msg(c, "on-flash format version is w%d/r%d, but software only supports up to version w%d/r%d",
1561 c->fmt_version, c->ro_compat_version,
1562 UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION);
1563 return -EROFS;
1564 }
1565
1566 mutex_lock(&c->umount_mutex);
1567 dbg_save_space_info(c);
1568 c->remounting_rw = 1;
1569 c->ro_mount = 0;
1570
1571 if (c->space_fixup) {
1572 err = ubifs_fixup_free_space(c);
1573 if (err)
1574 goto out;
1575 }
1576
1577 err = check_free_space(c);
1578 if (err)
1579 goto out;
1580
1581 if (c->old_leb_cnt != c->leb_cnt) {
1582 struct ubifs_sb_node *sup;
1583
1584 sup = ubifs_read_sb_node(c);
1585 if (IS_ERR(sup)) {
1586 err = PTR_ERR(sup);
1587 goto out;
1588 }
1589 sup->leb_cnt = cpu_to_le32(c->leb_cnt);
1590 err = ubifs_write_sb_node(c, sup);
1591 kfree(sup);
1592 if (err)
1593 goto out;
1594 }
1595
1596 if (c->need_recovery) {
1597 ubifs_msg(c, "completing deferred recovery");
1598 err = ubifs_write_rcvrd_mst_node(c);
1599 if (err)
1600 goto out;
1601 err = ubifs_recover_size(c);
1602 if (err)
1603 goto out;
1604 err = ubifs_clean_lebs(c, c->sbuf);
1605 if (err)
1606 goto out;
1607 err = ubifs_recover_inl_heads(c, c->sbuf);
1608 if (err)
1609 goto out;
1610 } else {
1611
1612 ubifs_assert(c->tot_orphans == 0);
1613 err = ubifs_clear_orphans(c);
1614 if (err)
1615 goto out;
1616 }
1617
1618 if (!(c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY))) {
1619 c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
1620 err = ubifs_write_master(c);
1621 if (err)
1622 goto out;
1623 }
1624
1625 c->ileb_buf = vmalloc(c->leb_size);
1626 if (!c->ileb_buf) {
1627 err = -ENOMEM;
1628 goto out;
1629 }
1630
1631 c->write_reserve_buf = kmalloc(COMPRESSED_DATA_NODE_BUF_SZ + \
1632 UBIFS_CIPHER_BLOCK_SIZE, GFP_KERNEL);
1633 if (!c->write_reserve_buf) {
1634 err = -ENOMEM;
1635 goto out;
1636 }
1637
1638 err = ubifs_lpt_init(c, 0, 1);
1639 if (err)
1640 goto out;
1641
1642
1643 c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name);
1644 if (IS_ERR(c->bgt)) {
1645 err = PTR_ERR(c->bgt);
1646 c->bgt = NULL;
1647 ubifs_err(c, "cannot spawn \"%s\", error %d",
1648 c->bgt_name, err);
1649 goto out;
1650 }
1651 wake_up_process(c->bgt);
1652
1653 c->orph_buf = vmalloc(c->leb_size);
1654 if (!c->orph_buf) {
1655 err = -ENOMEM;
1656 goto out;
1657 }
1658
1659
1660 lnum = c->lhead_lnum + 1;
1661 if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
1662 lnum = UBIFS_LOG_LNUM;
1663 if (lnum == c->ltail_lnum) {
1664 err = ubifs_consolidate_log(c);
1665 if (err)
1666 goto out;
1667 }
1668
1669 if (c->need_recovery)
1670 err = ubifs_rcvry_gc_commit(c);
1671 else
1672 err = ubifs_leb_unmap(c, c->gc_lnum);
1673 if (err)
1674 goto out;
1675
1676 dbg_gen("re-mounted read-write");
1677 c->remounting_rw = 0;
1678
1679 if (c->need_recovery) {
1680 c->need_recovery = 0;
1681 ubifs_msg(c, "deferred recovery completed");
1682 } else {
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693 err = dbg_check_space_info(c);
1694 }
1695
1696 mutex_unlock(&c->umount_mutex);
1697 return err;
1698
1699out:
1700 c->ro_mount = 1;
1701 vfree(c->orph_buf);
1702 c->orph_buf = NULL;
1703 if (c->bgt) {
1704 kthread_stop(c->bgt);
1705 c->bgt = NULL;
1706 }
1707 free_wbufs(c);
1708 kfree(c->write_reserve_buf);
1709 c->write_reserve_buf = NULL;
1710 vfree(c->ileb_buf);
1711 c->ileb_buf = NULL;
1712 ubifs_lpt_free(c, 1);
1713 c->remounting_rw = 0;
1714 mutex_unlock(&c->umount_mutex);
1715 return err;
1716}
1717
1718
1719
1720
1721
1722
1723
1724
1725static void ubifs_remount_ro(struct ubifs_info *c)
1726{
1727 int i, err;
1728
1729 ubifs_assert(!c->need_recovery);
1730 ubifs_assert(!c->ro_mount);
1731
1732 mutex_lock(&c->umount_mutex);
1733 if (c->bgt) {
1734 kthread_stop(c->bgt);
1735 c->bgt = NULL;
1736 }
1737
1738 dbg_save_space_info(c);
1739
1740 for (i = 0; i < c->jhead_cnt; i++)
1741 ubifs_wbuf_sync(&c->jheads[i].wbuf);
1742
1743 c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
1744 c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
1745 c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
1746 err = ubifs_write_master(c);
1747 if (err)
1748 ubifs_ro_mode(c, err);
1749
1750 vfree(c->orph_buf);
1751 c->orph_buf = NULL;
1752 kfree(c->write_reserve_buf);
1753 c->write_reserve_buf = NULL;
1754 vfree(c->ileb_buf);
1755 c->ileb_buf = NULL;
1756 ubifs_lpt_free(c, 1);
1757 c->ro_mount = 1;
1758 err = dbg_check_space_info(c);
1759 if (err)
1760 ubifs_ro_mode(c, err);
1761 mutex_unlock(&c->umount_mutex);
1762}
1763
1764static void ubifs_put_super(struct super_block *sb)
1765{
1766 int i;
1767 struct ubifs_info *c = sb->s_fs_info;
1768
1769 ubifs_msg(c, "un-mount UBI device %d", c->vi.ubi_num);
1770
1771
1772
1773
1774
1775
1776 if (!c->ro_error) {
1777 ubifs_assert(c->bi.idx_growth == 0);
1778 ubifs_assert(c->bi.dd_growth == 0);
1779 ubifs_assert(c->bi.data_growth == 0);
1780 }
1781
1782
1783
1784
1785
1786
1787
1788 mutex_lock(&c->umount_mutex);
1789 if (!c->ro_mount) {
1790
1791
1792
1793
1794 if (c->bgt) {
1795 kthread_stop(c->bgt);
1796 c->bgt = NULL;
1797 }
1798
1799
1800
1801
1802
1803 if (!c->ro_error) {
1804 int err;
1805
1806
1807 for (i = 0; i < c->jhead_cnt; i++)
1808 ubifs_wbuf_sync(&c->jheads[i].wbuf);
1809
1810
1811
1812
1813
1814
1815 c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
1816 c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
1817 c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
1818 err = ubifs_write_master(c);
1819 if (err)
1820
1821
1822
1823
1824
1825 ubifs_err(c, "failed to write master node, error %d",
1826 err);
1827 } else {
1828 for (i = 0; i < c->jhead_cnt; i++)
1829
1830 hrtimer_cancel(&c->jheads[i].wbuf.timer);
1831 }
1832 }
1833
1834 ubifs_umount(c);
1835 ubi_close_volume(c->ubi);
1836 mutex_unlock(&c->umount_mutex);
1837}
1838
1839static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
1840{
1841 int err;
1842 struct ubifs_info *c = sb->s_fs_info;
1843
1844 sync_filesystem(sb);
1845 dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags);
1846
1847 err = ubifs_parse_options(c, data, 1);
1848 if (err) {
1849 ubifs_err(c, "invalid or unknown remount parameter");
1850 return err;
1851 }
1852
1853 if (c->ro_mount && !(*flags & SB_RDONLY)) {
1854 if (c->ro_error) {
1855 ubifs_msg(c, "cannot re-mount R/W due to prior errors");
1856 return -EROFS;
1857 }
1858 if (c->ro_media) {
1859 ubifs_msg(c, "cannot re-mount R/W - UBI volume is R/O");
1860 return -EROFS;
1861 }
1862 err = ubifs_remount_rw(c);
1863 if (err)
1864 return err;
1865 } else if (!c->ro_mount && (*flags & SB_RDONLY)) {
1866 if (c->ro_error) {
1867 ubifs_msg(c, "cannot re-mount R/O due to prior errors");
1868 return -EROFS;
1869 }
1870 ubifs_remount_ro(c);
1871 }
1872
1873 if (c->bulk_read == 1)
1874 bu_init(c);
1875 else {
1876 dbg_gen("disable bulk-read");
1877 mutex_lock(&c->bu_mutex);
1878 kfree(c->bu.buf);
1879 c->bu.buf = NULL;
1880 mutex_unlock(&c->bu_mutex);
1881 }
1882
1883 ubifs_assert(c->lst.taken_empty_lebs > 0);
1884 return 0;
1885}
1886
1887const struct super_operations ubifs_super_operations = {
1888 .alloc_inode = ubifs_alloc_inode,
1889 .destroy_inode = ubifs_destroy_inode,
1890 .put_super = ubifs_put_super,
1891 .write_inode = ubifs_write_inode,
1892 .evict_inode = ubifs_evict_inode,
1893 .statfs = ubifs_statfs,
1894 .dirty_inode = ubifs_dirty_inode,
1895 .remount_fs = ubifs_remount_fs,
1896 .show_options = ubifs_show_options,
1897 .sync_fs = ubifs_sync_fs,
1898};
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919static struct ubi_volume_desc *open_ubi(const char *name, int mode)
1920{
1921 struct ubi_volume_desc *ubi;
1922 int dev, vol;
1923 char *endptr;
1924
1925
1926 ubi = ubi_open_volume_path(name, mode);
1927 if (!IS_ERR(ubi))
1928 return ubi;
1929
1930
1931 if (name[0] != 'u' || name[1] != 'b' || name[2] != 'i')
1932 return ERR_PTR(-EINVAL);
1933
1934
1935 if ((name[3] == ':' || name[3] == '!') && name[4] != '\0')
1936 return ubi_open_volume_nm(0, name + 4, mode);
1937
1938 if (!isdigit(name[3]))
1939 return ERR_PTR(-EINVAL);
1940
1941 dev = simple_strtoul(name + 3, &endptr, 0);
1942
1943
1944 if (*endptr == '\0')
1945 return ubi_open_volume(0, dev, mode);
1946
1947
1948 if (*endptr == '_' && isdigit(endptr[1])) {
1949 vol = simple_strtoul(endptr + 1, &endptr, 0);
1950 if (*endptr != '\0')
1951 return ERR_PTR(-EINVAL);
1952 return ubi_open_volume(dev, vol, mode);
1953 }
1954
1955
1956 if ((*endptr == ':' || *endptr == '!') && endptr[1] != '\0')
1957 return ubi_open_volume_nm(dev, ++endptr, mode);
1958
1959 return ERR_PTR(-EINVAL);
1960}
1961
1962static struct ubifs_info *alloc_ubifs_info(struct ubi_volume_desc *ubi)
1963{
1964 struct ubifs_info *c;
1965
1966 c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
1967 if (c) {
1968 spin_lock_init(&c->cnt_lock);
1969 spin_lock_init(&c->cs_lock);
1970 spin_lock_init(&c->buds_lock);
1971 spin_lock_init(&c->space_lock);
1972 spin_lock_init(&c->orphan_lock);
1973 init_rwsem(&c->commit_sem);
1974 mutex_init(&c->lp_mutex);
1975 mutex_init(&c->tnc_mutex);
1976 mutex_init(&c->log_mutex);
1977 mutex_init(&c->umount_mutex);
1978 mutex_init(&c->bu_mutex);
1979 mutex_init(&c->write_reserve_mutex);
1980 init_waitqueue_head(&c->cmt_wq);
1981 c->buds = RB_ROOT;
1982 c->old_idx = RB_ROOT;
1983 c->size_tree = RB_ROOT;
1984 c->orph_tree = RB_ROOT;
1985 INIT_LIST_HEAD(&c->infos_list);
1986 INIT_LIST_HEAD(&c->idx_gc);
1987 INIT_LIST_HEAD(&c->replay_list);
1988 INIT_LIST_HEAD(&c->replay_buds);
1989 INIT_LIST_HEAD(&c->uncat_list);
1990 INIT_LIST_HEAD(&c->empty_list);
1991 INIT_LIST_HEAD(&c->freeable_list);
1992 INIT_LIST_HEAD(&c->frdi_idx_list);
1993 INIT_LIST_HEAD(&c->unclean_leb_list);
1994 INIT_LIST_HEAD(&c->old_buds);
1995 INIT_LIST_HEAD(&c->orph_list);
1996 INIT_LIST_HEAD(&c->orph_new);
1997 c->no_chk_data_crc = 1;
1998
1999 c->highest_inum = UBIFS_FIRST_INO;
2000 c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
2001
2002 ubi_get_volume_info(ubi, &c->vi);
2003 ubi_get_device_info(c->vi.ubi_num, &c->di);
2004 }
2005 return c;
2006}
2007
2008static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
2009{
2010 struct ubifs_info *c = sb->s_fs_info;
2011 struct inode *root;
2012 int err;
2013
2014 c->vfs_sb = sb;
2015
2016 c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READWRITE);
2017 if (IS_ERR(c->ubi)) {
2018 err = PTR_ERR(c->ubi);
2019 goto out;
2020 }
2021
2022 err = ubifs_parse_options(c, data, 0);
2023 if (err)
2024 goto out_close;
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036 err = super_setup_bdi_name(sb, "ubifs_%d_%d", c->vi.ubi_num,
2037 c->vi.vol_id);
2038 if (err)
2039 goto out_close;
2040
2041 sb->s_fs_info = c;
2042 sb->s_magic = UBIFS_SUPER_MAGIC;
2043 sb->s_blocksize = UBIFS_BLOCK_SIZE;
2044 sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
2045 sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
2046 if (c->max_inode_sz > MAX_LFS_FILESIZE)
2047 sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
2048 sb->s_op = &ubifs_super_operations;
2049 sb->s_xattr = ubifs_xattr_handlers;
2050#ifdef CONFIG_UBIFS_FS_ENCRYPTION
2051 sb->s_cop = &ubifs_crypt_operations;
2052#endif
2053
2054 mutex_lock(&c->umount_mutex);
2055 err = mount_ubifs(c);
2056 if (err) {
2057 ubifs_assert(err < 0);
2058 goto out_unlock;
2059 }
2060
2061
2062 root = ubifs_iget(sb, UBIFS_ROOT_INO);
2063 if (IS_ERR(root)) {
2064 err = PTR_ERR(root);
2065 goto out_umount;
2066 }
2067
2068 sb->s_root = d_make_root(root);
2069 if (!sb->s_root) {
2070 err = -ENOMEM;
2071 goto out_umount;
2072 }
2073
2074 mutex_unlock(&c->umount_mutex);
2075 return 0;
2076
2077out_umount:
2078 ubifs_umount(c);
2079out_unlock:
2080 mutex_unlock(&c->umount_mutex);
2081out_close:
2082 ubi_close_volume(c->ubi);
2083out:
2084 return err;
2085}
2086
2087static int sb_test(struct super_block *sb, void *data)
2088{
2089 struct ubifs_info *c1 = data;
2090 struct ubifs_info *c = sb->s_fs_info;
2091
2092 return c->vi.cdev == c1->vi.cdev;
2093}
2094
2095static int sb_set(struct super_block *sb, void *data)
2096{
2097 sb->s_fs_info = data;
2098 return set_anon_super(sb, NULL);
2099}
2100
2101static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
2102 const char *name, void *data)
2103{
2104 struct ubi_volume_desc *ubi;
2105 struct ubifs_info *c;
2106 struct super_block *sb;
2107 int err;
2108
2109 dbg_gen("name %s, flags %#x", name, flags);
2110
2111
2112
2113
2114
2115
2116 ubi = open_ubi(name, UBI_READONLY);
2117 if (IS_ERR(ubi)) {
2118 if (!(flags & SB_SILENT))
2119 pr_err("UBIFS error (pid: %d): cannot open \"%s\", error %d",
2120 current->pid, name, (int)PTR_ERR(ubi));
2121 return ERR_CAST(ubi);
2122 }
2123
2124 c = alloc_ubifs_info(ubi);
2125 if (!c) {
2126 err = -ENOMEM;
2127 goto out_close;
2128 }
2129
2130 dbg_gen("opened ubi%d_%d", c->vi.ubi_num, c->vi.vol_id);
2131
2132 sb = sget(fs_type, sb_test, sb_set, flags, c);
2133 if (IS_ERR(sb)) {
2134 err = PTR_ERR(sb);
2135 kfree(c);
2136 goto out_close;
2137 }
2138
2139 if (sb->s_root) {
2140 struct ubifs_info *c1 = sb->s_fs_info;
2141 kfree(c);
2142
2143 dbg_gen("this ubi volume is already mounted");
2144 if (!!(flags & SB_RDONLY) != c1->ro_mount) {
2145 err = -EBUSY;
2146 goto out_deact;
2147 }
2148 } else {
2149 err = ubifs_fill_super(sb, data, flags & SB_SILENT ? 1 : 0);
2150 if (err)
2151 goto out_deact;
2152
2153 sb->s_flags |= SB_ACTIVE;
2154#ifndef CONFIG_UBIFS_ATIME_SUPPORT
2155 sb->s_flags |= SB_NOATIME;
2156#else
2157 ubifs_msg(c, "full atime support is enabled.");
2158#endif
2159 }
2160
2161
2162 ubi_close_volume(ubi);
2163
2164 return dget(sb->s_root);
2165
2166out_deact:
2167 deactivate_locked_super(sb);
2168out_close:
2169 ubi_close_volume(ubi);
2170 return ERR_PTR(err);
2171}
2172
2173static void kill_ubifs_super(struct super_block *s)
2174{
2175 struct ubifs_info *c = s->s_fs_info;
2176 kill_anon_super(s);
2177 kfree(c);
2178}
2179
2180static struct file_system_type ubifs_fs_type = {
2181 .name = "ubifs",
2182 .owner = THIS_MODULE,
2183 .mount = ubifs_mount,
2184 .kill_sb = kill_ubifs_super,
2185};
2186MODULE_ALIAS_FS("ubifs");
2187
2188
2189
2190
2191static void inode_slab_ctor(void *obj)
2192{
2193 struct ubifs_inode *ui = obj;
2194 inode_init_once(&ui->vfs_inode);
2195}
2196
2197static int __init ubifs_init(void)
2198{
2199 int err;
2200
2201 BUILD_BUG_ON(sizeof(struct ubifs_ch) != 24);
2202
2203
2204 BUILD_BUG_ON(UBIFS_CH_SZ & 7);
2205 BUILD_BUG_ON(UBIFS_INO_NODE_SZ & 7);
2206 BUILD_BUG_ON(UBIFS_DENT_NODE_SZ & 7);
2207 BUILD_BUG_ON(UBIFS_XENT_NODE_SZ & 7);
2208 BUILD_BUG_ON(UBIFS_DATA_NODE_SZ & 7);
2209 BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ & 7);
2210 BUILD_BUG_ON(UBIFS_SB_NODE_SZ & 7);
2211 BUILD_BUG_ON(UBIFS_MST_NODE_SZ & 7);
2212 BUILD_BUG_ON(UBIFS_REF_NODE_SZ & 7);
2213 BUILD_BUG_ON(UBIFS_CS_NODE_SZ & 7);
2214 BUILD_BUG_ON(UBIFS_ORPH_NODE_SZ & 7);
2215
2216 BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ & 7);
2217 BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ & 7);
2218 BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ & 7);
2219 BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ & 7);
2220 BUILD_BUG_ON(UBIFS_MAX_NODE_SZ & 7);
2221 BUILD_BUG_ON(MIN_WRITE_SZ & 7);
2222
2223
2224 BUILD_BUG_ON(UBIFS_INO_NODE_SZ < MIN_WRITE_SZ);
2225 BUILD_BUG_ON(UBIFS_DENT_NODE_SZ < MIN_WRITE_SZ);
2226 BUILD_BUG_ON(UBIFS_XENT_NODE_SZ < MIN_WRITE_SZ);
2227 BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ < MIN_WRITE_SZ);
2228
2229 BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
2230 BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
2231 BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ > UBIFS_MAX_NODE_SZ);
2232 BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ > UBIFS_MAX_NODE_SZ);
2233
2234
2235 BUILD_BUG_ON(UBIFS_SB_NODE_SZ != 4096);
2236 BUILD_BUG_ON(UBIFS_MST_NODE_SZ != 512);
2237 BUILD_BUG_ON(UBIFS_INO_NODE_SZ != 160);
2238 BUILD_BUG_ON(UBIFS_REF_NODE_SZ != 64);
2239
2240
2241
2242
2243
2244
2245
2246 BUILD_BUG_ON(UBIFS_COMPR_TYPES_CNT > 4);
2247
2248
2249
2250
2251
2252 if (PAGE_SIZE < UBIFS_BLOCK_SIZE) {
2253 pr_err("UBIFS error (pid %d): VFS page cache size is %u bytes, but UBIFS requires at least 4096 bytes",
2254 current->pid, (unsigned int)PAGE_SIZE);
2255 return -EINVAL;
2256 }
2257
2258 ubifs_inode_slab = kmem_cache_create("ubifs_inode_slab",
2259 sizeof(struct ubifs_inode), 0,
2260 SLAB_MEM_SPREAD | SLAB_RECLAIM_ACCOUNT |
2261 SLAB_ACCOUNT, &inode_slab_ctor);
2262 if (!ubifs_inode_slab)
2263 return -ENOMEM;
2264
2265 err = register_shrinker(&ubifs_shrinker_info);
2266 if (err)
2267 goto out_slab;
2268
2269 err = ubifs_compressors_init();
2270 if (err)
2271 goto out_shrinker;
2272
2273 err = dbg_debugfs_init();
2274 if (err)
2275 goto out_compr;
2276
2277 err = register_filesystem(&ubifs_fs_type);
2278 if (err) {
2279 pr_err("UBIFS error (pid %d): cannot register file system, error %d",
2280 current->pid, err);
2281 goto out_dbg;
2282 }
2283 return 0;
2284
2285out_dbg:
2286 dbg_debugfs_exit();
2287out_compr:
2288 ubifs_compressors_exit();
2289out_shrinker:
2290 unregister_shrinker(&ubifs_shrinker_info);
2291out_slab:
2292 kmem_cache_destroy(ubifs_inode_slab);
2293 return err;
2294}
2295
2296late_initcall(ubifs_init);
2297
2298static void __exit ubifs_exit(void)
2299{
2300 ubifs_assert(list_empty(&ubifs_infos));
2301 ubifs_assert(atomic_long_read(&ubifs_clean_zn_cnt) == 0);
2302
2303 dbg_debugfs_exit();
2304 ubifs_compressors_exit();
2305 unregister_shrinker(&ubifs_shrinker_info);
2306
2307
2308
2309
2310
2311 rcu_barrier();
2312 kmem_cache_destroy(ubifs_inode_slab);
2313 unregister_filesystem(&ubifs_fs_type);
2314}
2315module_exit(ubifs_exit);
2316
2317MODULE_LICENSE("GPL");
2318MODULE_VERSION(__stringify(UBIFS_VERSION));
2319MODULE_AUTHOR("Artem Bityutskiy, Adrian Hunter");
2320MODULE_DESCRIPTION("UBIFS - UBI File System");
2321