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-rw-r--r--fs/f2fs/checkpoint.c792
1 files changed, 792 insertions, 0 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
new file mode 100644
index 000000000000..ab743f92ee06
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+++ b/fs/f2fs/checkpoint.c
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1/**
2 * fs/f2fs/checkpoint.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/bio.h>
13#include <linux/mpage.h>
14#include <linux/writeback.h>
15#include <linux/blkdev.h>
16#include <linux/f2fs_fs.h>
17#include <linux/pagevec.h>
18#include <linux/swap.h>
19
20#include "f2fs.h"
21#include "node.h"
22#include "segment.h"
23
24static struct kmem_cache *orphan_entry_slab;
25static struct kmem_cache *inode_entry_slab;
26
27/**
28 * We guarantee no failure on the returned page.
29 */
30struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
31{
32 struct address_space *mapping = sbi->meta_inode->i_mapping;
33 struct page *page = NULL;
34repeat:
35 page = grab_cache_page(mapping, index);
36 if (!page) {
37 cond_resched();
38 goto repeat;
39 }
40
41 /* We wait writeback only inside grab_meta_page() */
42 wait_on_page_writeback(page);
43 SetPageUptodate(page);
44 return page;
45}
46
47/**
48 * We guarantee no failure on the returned page.
49 */
50struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
51{
52 struct address_space *mapping = sbi->meta_inode->i_mapping;
53 struct page *page;
54repeat:
55 page = grab_cache_page(mapping, index);
56 if (!page) {
57 cond_resched();
58 goto repeat;
59 }
60 if (f2fs_readpage(sbi, page, index, READ_SYNC)) {
61 f2fs_put_page(page, 1);
62 goto repeat;
63 }
64 mark_page_accessed(page);
65
66 /* We do not allow returning an errorneous page */
67 return page;
68}
69
70static int f2fs_write_meta_page(struct page *page,
71 struct writeback_control *wbc)
72{
73 struct inode *inode = page->mapping->host;
74 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
75 int err;
76
77 wait_on_page_writeback(page);
78
79 err = write_meta_page(sbi, page, wbc);
80 if (err) {
81 wbc->pages_skipped++;
82 set_page_dirty(page);
83 }
84
85 dec_page_count(sbi, F2FS_DIRTY_META);
86
87 /* In this case, we should not unlock this page */
88 if (err != AOP_WRITEPAGE_ACTIVATE)
89 unlock_page(page);
90 return err;
91}
92
93static int f2fs_write_meta_pages(struct address_space *mapping,
94 struct writeback_control *wbc)
95{
96 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
97 struct block_device *bdev = sbi->sb->s_bdev;
98 long written;
99
100 if (wbc->for_kupdate)
101 return 0;
102
103 if (get_pages(sbi, F2FS_DIRTY_META) == 0)
104 return 0;
105
106 /* if mounting is failed, skip writing node pages */
107 mutex_lock(&sbi->cp_mutex);
108 written = sync_meta_pages(sbi, META, bio_get_nr_vecs(bdev));
109 mutex_unlock(&sbi->cp_mutex);
110 wbc->nr_to_write -= written;
111 return 0;
112}
113
114long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
115 long nr_to_write)
116{
117 struct address_space *mapping = sbi->meta_inode->i_mapping;
118 pgoff_t index = 0, end = LONG_MAX;
119 struct pagevec pvec;
120 long nwritten = 0;
121 struct writeback_control wbc = {
122 .for_reclaim = 0,
123 };
124
125 pagevec_init(&pvec, 0);
126
127 while (index <= end) {
128 int i, nr_pages;
129 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
130 PAGECACHE_TAG_DIRTY,
131 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
132 if (nr_pages == 0)
133 break;
134
135 for (i = 0; i < nr_pages; i++) {
136 struct page *page = pvec.pages[i];
137 lock_page(page);
138 BUG_ON(page->mapping != mapping);
139 BUG_ON(!PageDirty(page));
140 clear_page_dirty_for_io(page);
141 f2fs_write_meta_page(page, &wbc);
142 if (nwritten++ >= nr_to_write)
143 break;
144 }
145 pagevec_release(&pvec);
146 cond_resched();
147 }
148
149 if (nwritten)
150 f2fs_submit_bio(sbi, type, nr_to_write == LONG_MAX);
151
152 return nwritten;
153}
154
155static int f2fs_set_meta_page_dirty(struct page *page)
156{
157 struct address_space *mapping = page->mapping;
158 struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
159
160 SetPageUptodate(page);
161 if (!PageDirty(page)) {
162 __set_page_dirty_nobuffers(page);
163 inc_page_count(sbi, F2FS_DIRTY_META);
164 F2FS_SET_SB_DIRT(sbi);
165 return 1;
166 }
167 return 0;
168}
169
170const struct address_space_operations f2fs_meta_aops = {
171 .writepage = f2fs_write_meta_page,
172 .writepages = f2fs_write_meta_pages,
173 .set_page_dirty = f2fs_set_meta_page_dirty,
174};
175
176int check_orphan_space(struct f2fs_sb_info *sbi)
177{
178 unsigned int max_orphans;
179 int err = 0;
180
181 /*
182 * considering 512 blocks in a segment 5 blocks are needed for cp
183 * and log segment summaries. Remaining blocks are used to keep
184 * orphan entries with the limitation one reserved segment
185 * for cp pack we can have max 1020*507 orphan entries
186 */
187 max_orphans = (sbi->blocks_per_seg - 5) * F2FS_ORPHANS_PER_BLOCK;
188 mutex_lock(&sbi->orphan_inode_mutex);
189 if (sbi->n_orphans >= max_orphans)
190 err = -ENOSPC;
191 mutex_unlock(&sbi->orphan_inode_mutex);
192 return err;
193}
194
195void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
196{
197 struct list_head *head, *this;
198 struct orphan_inode_entry *new = NULL, *orphan = NULL;
199
200 mutex_lock(&sbi->orphan_inode_mutex);
201 head = &sbi->orphan_inode_list;
202 list_for_each(this, head) {
203 orphan = list_entry(this, struct orphan_inode_entry, list);
204 if (orphan->ino == ino)
205 goto out;
206 if (orphan->ino > ino)
207 break;
208 orphan = NULL;
209 }
210retry:
211 new = kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC);
212 if (!new) {
213 cond_resched();
214 goto retry;
215 }
216 new->ino = ino;
217 INIT_LIST_HEAD(&new->list);
218
219 /* add new_oentry into list which is sorted by inode number */
220 if (orphan) {
221 struct orphan_inode_entry *prev;
222
223 /* get previous entry */
224 prev = list_entry(orphan->list.prev, typeof(*prev), list);
225 if (&prev->list != head)
226 /* insert new orphan inode entry */
227 list_add(&new->list, &prev->list);
228 else
229 list_add(&new->list, head);
230 } else {
231 list_add_tail(&new->list, head);
232 }
233 sbi->n_orphans++;
234out:
235 mutex_unlock(&sbi->orphan_inode_mutex);
236}
237
238void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
239{
240 struct list_head *this, *next, *head;
241 struct orphan_inode_entry *orphan;
242
243 mutex_lock(&sbi->orphan_inode_mutex);
244 head = &sbi->orphan_inode_list;
245 list_for_each_safe(this, next, head) {
246 orphan = list_entry(this, struct orphan_inode_entry, list);
247 if (orphan->ino == ino) {
248 list_del(&orphan->list);
249 kmem_cache_free(orphan_entry_slab, orphan);
250 sbi->n_orphans--;
251 break;
252 }
253 }
254 mutex_unlock(&sbi->orphan_inode_mutex);
255}
256
257static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
258{
259 struct inode *inode = f2fs_iget(sbi->sb, ino);
260 BUG_ON(IS_ERR(inode));
261 clear_nlink(inode);
262
263 /* truncate all the data during iput */
264 iput(inode);
265}
266
267int recover_orphan_inodes(struct f2fs_sb_info *sbi)
268{
269 block_t start_blk, orphan_blkaddr, i, j;
270
271 if (!(F2FS_CKPT(sbi)->ckpt_flags & CP_ORPHAN_PRESENT_FLAG))
272 return 0;
273
274 sbi->por_doing = 1;
275 start_blk = __start_cp_addr(sbi) + 1;
276 orphan_blkaddr = __start_sum_addr(sbi) - 1;
277
278 for (i = 0; i < orphan_blkaddr; i++) {
279 struct page *page = get_meta_page(sbi, start_blk + i);
280 struct f2fs_orphan_block *orphan_blk;
281
282 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
283 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
284 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
285 recover_orphan_inode(sbi, ino);
286 }
287 f2fs_put_page(page, 1);
288 }
289 /* clear Orphan Flag */
290 F2FS_CKPT(sbi)->ckpt_flags &= (~CP_ORPHAN_PRESENT_FLAG);
291 sbi->por_doing = 0;
292 return 0;
293}
294
295static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
296{
297 struct list_head *head, *this, *next;
298 struct f2fs_orphan_block *orphan_blk = NULL;
299 struct page *page = NULL;
300 unsigned int nentries = 0;
301 unsigned short index = 1;
302 unsigned short orphan_blocks;
303
304 orphan_blocks = (unsigned short)((sbi->n_orphans +
305 (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK);
306
307 mutex_lock(&sbi->orphan_inode_mutex);
308 head = &sbi->orphan_inode_list;
309
310 /* loop for each orphan inode entry and write them in Jornal block */
311 list_for_each_safe(this, next, head) {
312 struct orphan_inode_entry *orphan;
313
314 orphan = list_entry(this, struct orphan_inode_entry, list);
315
316 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
317 /*
318 * an orphan block is full of 1020 entries,
319 * then we need to flush current orphan blocks
320 * and bring another one in memory
321 */
322 orphan_blk->blk_addr = cpu_to_le16(index);
323 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
324 orphan_blk->entry_count = cpu_to_le32(nentries);
325 set_page_dirty(page);
326 f2fs_put_page(page, 1);
327 index++;
328 start_blk++;
329 nentries = 0;
330 page = NULL;
331 }
332 if (page)
333 goto page_exist;
334
335 page = grab_meta_page(sbi, start_blk);
336 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
337 memset(orphan_blk, 0, sizeof(*orphan_blk));
338page_exist:
339 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
340 }
341 if (!page)
342 goto end;
343
344 orphan_blk->blk_addr = cpu_to_le16(index);
345 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
346 orphan_blk->entry_count = cpu_to_le32(nentries);
347 set_page_dirty(page);
348 f2fs_put_page(page, 1);
349end:
350 mutex_unlock(&sbi->orphan_inode_mutex);
351}
352
353static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
354 block_t cp_addr, unsigned long long *version)
355{
356 struct page *cp_page_1, *cp_page_2 = NULL;
357 unsigned long blk_size = sbi->blocksize;
358 struct f2fs_checkpoint *cp_block;
359 unsigned long long cur_version = 0, pre_version = 0;
360 unsigned int crc = 0;
361 size_t crc_offset;
362
363 /* Read the 1st cp block in this CP pack */
364 cp_page_1 = get_meta_page(sbi, cp_addr);
365
366 /* get the version number */
367 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
368 crc_offset = le32_to_cpu(cp_block->checksum_offset);
369 if (crc_offset >= blk_size)
370 goto invalid_cp1;
371
372 crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset);
373 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
374 goto invalid_cp1;
375
376 pre_version = le64_to_cpu(cp_block->checkpoint_ver);
377
378 /* Read the 2nd cp block in this CP pack */
379 cp_addr += le64_to_cpu(cp_block->cp_pack_total_block_count) - 1;
380 cp_page_2 = get_meta_page(sbi, cp_addr);
381
382 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
383 crc_offset = le32_to_cpu(cp_block->checksum_offset);
384 if (crc_offset >= blk_size)
385 goto invalid_cp2;
386
387 crc = *(unsigned int *)((unsigned char *)cp_block + crc_offset);
388 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
389 goto invalid_cp2;
390
391 cur_version = le64_to_cpu(cp_block->checkpoint_ver);
392
393 if (cur_version == pre_version) {
394 *version = cur_version;
395 f2fs_put_page(cp_page_2, 1);
396 return cp_page_1;
397 }
398invalid_cp2:
399 f2fs_put_page(cp_page_2, 1);
400invalid_cp1:
401 f2fs_put_page(cp_page_1, 1);
402 return NULL;
403}
404
405int get_valid_checkpoint(struct f2fs_sb_info *sbi)
406{
407 struct f2fs_checkpoint *cp_block;
408 struct f2fs_super_block *fsb = sbi->raw_super;
409 struct page *cp1, *cp2, *cur_page;
410 unsigned long blk_size = sbi->blocksize;
411 unsigned long long cp1_version = 0, cp2_version = 0;
412 unsigned long long cp_start_blk_no;
413
414 sbi->ckpt = kzalloc(blk_size, GFP_KERNEL);
415 if (!sbi->ckpt)
416 return -ENOMEM;
417 /*
418 * Finding out valid cp block involves read both
419 * sets( cp pack1 and cp pack 2)
420 */
421 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
422 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
423
424 /* The second checkpoint pack should start at the next segment */
425 cp_start_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
426 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
427
428 if (cp1 && cp2) {
429 if (ver_after(cp2_version, cp1_version))
430 cur_page = cp2;
431 else
432 cur_page = cp1;
433 } else if (cp1) {
434 cur_page = cp1;
435 } else if (cp2) {
436 cur_page = cp2;
437 } else {
438 goto fail_no_cp;
439 }
440
441 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
442 memcpy(sbi->ckpt, cp_block, blk_size);
443
444 f2fs_put_page(cp1, 1);
445 f2fs_put_page(cp2, 1);
446 return 0;
447
448fail_no_cp:
449 kfree(sbi->ckpt);
450 return -EINVAL;
451}
452
453void set_dirty_dir_page(struct inode *inode, struct page *page)
454{
455 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
456 struct list_head *head = &sbi->dir_inode_list;
457 struct dir_inode_entry *new;
458 struct list_head *this;
459
460 if (!S_ISDIR(inode->i_mode))
461 return;
462retry:
463 new = kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
464 if (!new) {
465 cond_resched();
466 goto retry;
467 }
468 new->inode = inode;
469 INIT_LIST_HEAD(&new->list);
470
471 spin_lock(&sbi->dir_inode_lock);
472 list_for_each(this, head) {
473 struct dir_inode_entry *entry;
474 entry = list_entry(this, struct dir_inode_entry, list);
475 if (entry->inode == inode) {
476 kmem_cache_free(inode_entry_slab, new);
477 goto out;
478 }
479 }
480 list_add_tail(&new->list, head);
481 sbi->n_dirty_dirs++;
482
483 BUG_ON(!S_ISDIR(inode->i_mode));
484out:
485 inc_page_count(sbi, F2FS_DIRTY_DENTS);
486 inode_inc_dirty_dents(inode);
487 SetPagePrivate(page);
488
489 spin_unlock(&sbi->dir_inode_lock);
490}
491
492void remove_dirty_dir_inode(struct inode *inode)
493{
494 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
495 struct list_head *head = &sbi->dir_inode_list;
496 struct list_head *this;
497
498 if (!S_ISDIR(inode->i_mode))
499 return;
500
501 spin_lock(&sbi->dir_inode_lock);
502 if (atomic_read(&F2FS_I(inode)->dirty_dents))
503 goto out;
504
505 list_for_each(this, head) {
506 struct dir_inode_entry *entry;
507 entry = list_entry(this, struct dir_inode_entry, list);
508 if (entry->inode == inode) {
509 list_del(&entry->list);
510 kmem_cache_free(inode_entry_slab, entry);
511 sbi->n_dirty_dirs--;
512 break;
513 }
514 }
515out:
516 spin_unlock(&sbi->dir_inode_lock);
517}
518
519void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
520{
521 struct list_head *head = &sbi->dir_inode_list;
522 struct dir_inode_entry *entry;
523 struct inode *inode;
524retry:
525 spin_lock(&sbi->dir_inode_lock);
526 if (list_empty(head)) {
527 spin_unlock(&sbi->dir_inode_lock);
528 return;
529 }
530 entry = list_entry(head->next, struct dir_inode_entry, list);
531 inode = igrab(entry->inode);
532 spin_unlock(&sbi->dir_inode_lock);
533 if (inode) {
534 filemap_flush(inode->i_mapping);
535 iput(inode);
536 } else {
537 /*
538 * We should submit bio, since it exists several
539 * wribacking dentry pages in the freeing inode.
540 */
541 f2fs_submit_bio(sbi, DATA, true);
542 }
543 goto retry;
544}
545
546/**
547 * Freeze all the FS-operations for checkpoint.
548 */
549void block_operations(struct f2fs_sb_info *sbi)
550{
551 int t;
552 struct writeback_control wbc = {
553 .sync_mode = WB_SYNC_ALL,
554 .nr_to_write = LONG_MAX,
555 .for_reclaim = 0,
556 };
557
558 /* Stop renaming operation */
559 mutex_lock_op(sbi, RENAME);
560 mutex_lock_op(sbi, DENTRY_OPS);
561
562retry_dents:
563 /* write all the dirty dentry pages */
564 sync_dirty_dir_inodes(sbi);
565
566 mutex_lock_op(sbi, DATA_WRITE);
567 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
568 mutex_unlock_op(sbi, DATA_WRITE);
569 goto retry_dents;
570 }
571
572 /* block all the operations */
573 for (t = DATA_NEW; t <= NODE_TRUNC; t++)
574 mutex_lock_op(sbi, t);
575
576 mutex_lock(&sbi->write_inode);
577
578 /*
579 * POR: we should ensure that there is no dirty node pages
580 * until finishing nat/sit flush.
581 */
582retry:
583 sync_node_pages(sbi, 0, &wbc);
584
585 mutex_lock_op(sbi, NODE_WRITE);
586
587 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
588 mutex_unlock_op(sbi, NODE_WRITE);
589 goto retry;
590 }
591 mutex_unlock(&sbi->write_inode);
592}
593
594static void unblock_operations(struct f2fs_sb_info *sbi)
595{
596 int t;
597 for (t = NODE_WRITE; t >= RENAME; t--)
598 mutex_unlock_op(sbi, t);
599}
600
601static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
602{
603 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
604 nid_t last_nid = 0;
605 block_t start_blk;
606 struct page *cp_page;
607 unsigned int data_sum_blocks, orphan_blocks;
608 void *kaddr;
609 __u32 crc32 = 0;
610 int i;
611
612 /* Flush all the NAT/SIT pages */
613 while (get_pages(sbi, F2FS_DIRTY_META))
614 sync_meta_pages(sbi, META, LONG_MAX);
615
616 next_free_nid(sbi, &last_nid);
617
618 /*
619 * modify checkpoint
620 * version number is already updated
621 */
622 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
623 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
624 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
625 for (i = 0; i < 3; i++) {
626 ckpt->cur_node_segno[i] =
627 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
628 ckpt->cur_node_blkoff[i] =
629 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
630 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
631 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
632 }
633 for (i = 0; i < 3; i++) {
634 ckpt->cur_data_segno[i] =
635 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
636 ckpt->cur_data_blkoff[i] =
637 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
638 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
639 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
640 }
641
642 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
643 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
644 ckpt->next_free_nid = cpu_to_le32(last_nid);
645
646 /* 2 cp + n data seg summary + orphan inode blocks */
647 data_sum_blocks = npages_for_summary_flush(sbi);
648 if (data_sum_blocks < 3)
649 ckpt->ckpt_flags |= CP_COMPACT_SUM_FLAG;
650 else
651 ckpt->ckpt_flags &= (~CP_COMPACT_SUM_FLAG);
652
653 orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1)
654 / F2FS_ORPHANS_PER_BLOCK;
655 ckpt->cp_pack_start_sum = 1 + orphan_blocks;
656 ckpt->cp_pack_total_block_count = 2 + data_sum_blocks + orphan_blocks;
657
658 if (is_umount) {
659 ckpt->ckpt_flags |= CP_UMOUNT_FLAG;
660 ckpt->cp_pack_total_block_count += NR_CURSEG_NODE_TYPE;
661 } else {
662 ckpt->ckpt_flags &= (~CP_UMOUNT_FLAG);
663 }
664
665 if (sbi->n_orphans)
666 ckpt->ckpt_flags |= CP_ORPHAN_PRESENT_FLAG;
667 else
668 ckpt->ckpt_flags &= (~CP_ORPHAN_PRESENT_FLAG);
669
670 /* update SIT/NAT bitmap */
671 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
672 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
673
674 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
675 *(__u32 *)((unsigned char *)ckpt +
676 le32_to_cpu(ckpt->checksum_offset))
677 = cpu_to_le32(crc32);
678
679 start_blk = __start_cp_addr(sbi);
680
681 /* write out checkpoint buffer at block 0 */
682 cp_page = grab_meta_page(sbi, start_blk++);
683 kaddr = page_address(cp_page);
684 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
685 set_page_dirty(cp_page);
686 f2fs_put_page(cp_page, 1);
687
688 if (sbi->n_orphans) {
689 write_orphan_inodes(sbi, start_blk);
690 start_blk += orphan_blocks;
691 }
692
693 write_data_summaries(sbi, start_blk);
694 start_blk += data_sum_blocks;
695 if (is_umount) {
696 write_node_summaries(sbi, start_blk);
697 start_blk += NR_CURSEG_NODE_TYPE;
698 }
699
700 /* writeout checkpoint block */
701 cp_page = grab_meta_page(sbi, start_blk);
702 kaddr = page_address(cp_page);
703 memcpy(kaddr, ckpt, (1 << sbi->log_blocksize));
704 set_page_dirty(cp_page);
705 f2fs_put_page(cp_page, 1);
706
707 /* wait for previous submitted node/meta pages writeback */
708 while (get_pages(sbi, F2FS_WRITEBACK))
709 congestion_wait(BLK_RW_ASYNC, HZ / 50);
710
711 filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX);
712 filemap_fdatawait_range(sbi->meta_inode->i_mapping, 0, LONG_MAX);
713
714 /* update user_block_counts */
715 sbi->last_valid_block_count = sbi->total_valid_block_count;
716 sbi->alloc_valid_block_count = 0;
717
718 /* Here, we only have one bio having CP pack */
719 if (sbi->ckpt->ckpt_flags & CP_ERROR_FLAG)
720 sbi->sb->s_flags |= MS_RDONLY;
721 else
722 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
723
724 clear_prefree_segments(sbi);
725 F2FS_RESET_SB_DIRT(sbi);
726}
727
728/**
729 * We guarantee that this checkpoint procedure should not fail.
730 */
731void write_checkpoint(struct f2fs_sb_info *sbi, bool blocked, bool is_umount)
732{
733 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
734 unsigned long long ckpt_ver;
735
736 if (!blocked) {
737 mutex_lock(&sbi->cp_mutex);
738 block_operations(sbi);
739 }
740
741 f2fs_submit_bio(sbi, DATA, true);
742 f2fs_submit_bio(sbi, NODE, true);
743 f2fs_submit_bio(sbi, META, true);
744
745 /*
746 * update checkpoint pack index
747 * Increase the version number so that
748 * SIT entries and seg summaries are written at correct place
749 */
750 ckpt_ver = le64_to_cpu(ckpt->checkpoint_ver);
751 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
752
753 /* write cached NAT/SIT entries to NAT/SIT area */
754 flush_nat_entries(sbi);
755 flush_sit_entries(sbi);
756
757 reset_victim_segmap(sbi);
758
759 /* unlock all the fs_lock[] in do_checkpoint() */
760 do_checkpoint(sbi, is_umount);
761
762 unblock_operations(sbi);
763 mutex_unlock(&sbi->cp_mutex);
764}
765
766void init_orphan_info(struct f2fs_sb_info *sbi)
767{
768 mutex_init(&sbi->orphan_inode_mutex);
769 INIT_LIST_HEAD(&sbi->orphan_inode_list);
770 sbi->n_orphans = 0;
771}
772
773int create_checkpoint_caches(void)
774{
775 orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry",
776 sizeof(struct orphan_inode_entry), NULL);
777 if (unlikely(!orphan_entry_slab))
778 return -ENOMEM;
779 inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
780 sizeof(struct dir_inode_entry), NULL);
781 if (unlikely(!inode_entry_slab)) {
782 kmem_cache_destroy(orphan_entry_slab);
783 return -ENOMEM;
784 }
785 return 0;
786}
787
788void destroy_checkpoint_caches(void)
789{
790 kmem_cache_destroy(orphan_entry_slab);
791 kmem_cache_destroy(inode_entry_slab);
792}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-01 23:23:10 -0400