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1 | /* | |
2 | * fs/f2fs/segment.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/f2fs_fs.h> | |
13 | #include <linux/bio.h> | |
14 | #include <linux/blkdev.h> | |
15 | #include <linux/prefetch.h> | |
16 | #include <linux/kthread.h> | |
17 | #include <linux/swap.h> | |
18 | #include <linux/timer.h> | |
19 | #include <linux/freezer.h> | |
20 | #include <linux/sched/signal.h> | |
21 | ||
22 | #include "f2fs.h" | |
23 | #include "segment.h" | |
24 | #include "node.h" | |
25 | #include "gc.h" | |
26 | #include "trace.h" | |
27 | #include <trace/events/f2fs.h> | |
28 | ||
29 | #define __reverse_ffz(x) __reverse_ffs(~(x)) | |
30 | ||
31 | static struct kmem_cache *discard_entry_slab; | |
32 | static struct kmem_cache *discard_cmd_slab; | |
33 | static struct kmem_cache *sit_entry_set_slab; | |
34 | static struct kmem_cache *inmem_entry_slab; | |
35 | ||
36 | static unsigned long __reverse_ulong(unsigned char *str) | |
37 | { | |
38 | unsigned long tmp = 0; | |
39 | int shift = 24, idx = 0; | |
40 | ||
41 | #if BITS_PER_LONG == 64 | |
42 | shift = 56; | |
43 | #endif | |
44 | while (shift >= 0) { | |
45 | tmp |= (unsigned long)str[idx++] << shift; | |
46 | shift -= BITS_PER_BYTE; | |
47 | } | |
48 | return tmp; | |
49 | } | |
50 | ||
51 | /* | |
52 | * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since | |
53 | * MSB and LSB are reversed in a byte by f2fs_set_bit. | |
54 | */ | |
55 | static inline unsigned long __reverse_ffs(unsigned long word) | |
56 | { | |
57 | int num = 0; | |
58 | ||
59 | #if BITS_PER_LONG == 64 | |
60 | if ((word & 0xffffffff00000000UL) == 0) | |
61 | num += 32; | |
62 | else | |
63 | word >>= 32; | |
64 | #endif | |
65 | if ((word & 0xffff0000) == 0) | |
66 | num += 16; | |
67 | else | |
68 | word >>= 16; | |
69 | ||
70 | if ((word & 0xff00) == 0) | |
71 | num += 8; | |
72 | else | |
73 | word >>= 8; | |
74 | ||
75 | if ((word & 0xf0) == 0) | |
76 | num += 4; | |
77 | else | |
78 | word >>= 4; | |
79 | ||
80 | if ((word & 0xc) == 0) | |
81 | num += 2; | |
82 | else | |
83 | word >>= 2; | |
84 | ||
85 | if ((word & 0x2) == 0) | |
86 | num += 1; | |
87 | return num; | |
88 | } | |
89 | ||
90 | /* | |
91 | * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because | |
92 | * f2fs_set_bit makes MSB and LSB reversed in a byte. | |
93 | * @size must be integral times of unsigned long. | |
94 | * Example: | |
95 | * MSB <--> LSB | |
96 | * f2fs_set_bit(0, bitmap) => 1000 0000 | |
97 | * f2fs_set_bit(7, bitmap) => 0000 0001 | |
98 | */ | |
99 | static unsigned long __find_rev_next_bit(const unsigned long *addr, | |
100 | unsigned long size, unsigned long offset) | |
101 | { | |
102 | const unsigned long *p = addr + BIT_WORD(offset); | |
103 | unsigned long result = size; | |
104 | unsigned long tmp; | |
105 | ||
106 | if (offset >= size) | |
107 | return size; | |
108 | ||
109 | size -= (offset & ~(BITS_PER_LONG - 1)); | |
110 | offset %= BITS_PER_LONG; | |
111 | ||
112 | while (1) { | |
113 | if (*p == 0) | |
114 | goto pass; | |
115 | ||
116 | tmp = __reverse_ulong((unsigned char *)p); | |
117 | ||
118 | tmp &= ~0UL >> offset; | |
119 | if (size < BITS_PER_LONG) | |
120 | tmp &= (~0UL << (BITS_PER_LONG - size)); | |
121 | if (tmp) | |
122 | goto found; | |
123 | pass: | |
124 | if (size <= BITS_PER_LONG) | |
125 | break; | |
126 | size -= BITS_PER_LONG; | |
127 | offset = 0; | |
128 | p++; | |
129 | } | |
130 | return result; | |
131 | found: | |
132 | return result - size + __reverse_ffs(tmp); | |
133 | } | |
134 | ||
135 | static unsigned long __find_rev_next_zero_bit(const unsigned long *addr, | |
136 | unsigned long size, unsigned long offset) | |
137 | { | |
138 | const unsigned long *p = addr + BIT_WORD(offset); | |
139 | unsigned long result = size; | |
140 | unsigned long tmp; | |
141 | ||
142 | if (offset >= size) | |
143 | return size; | |
144 | ||
145 | size -= (offset & ~(BITS_PER_LONG - 1)); | |
146 | offset %= BITS_PER_LONG; | |
147 | ||
148 | while (1) { | |
149 | if (*p == ~0UL) | |
150 | goto pass; | |
151 | ||
152 | tmp = __reverse_ulong((unsigned char *)p); | |
153 | ||
154 | if (offset) | |
155 | tmp |= ~0UL << (BITS_PER_LONG - offset); | |
156 | if (size < BITS_PER_LONG) | |
157 | tmp |= ~0UL >> size; | |
158 | if (tmp != ~0UL) | |
159 | goto found; | |
160 | pass: | |
161 | if (size <= BITS_PER_LONG) | |
162 | break; | |
163 | size -= BITS_PER_LONG; | |
164 | offset = 0; | |
165 | p++; | |
166 | } | |
167 | return result; | |
168 | found: | |
169 | return result - size + __reverse_ffz(tmp); | |
170 | } | |
171 | ||
172 | bool need_SSR(struct f2fs_sb_info *sbi) | |
173 | { | |
174 | int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); | |
175 | int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); | |
176 | int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); | |
177 | ||
178 | if (test_opt(sbi, LFS)) | |
179 | return false; | |
180 | if (sbi->gc_thread && sbi->gc_thread->gc_urgent) | |
181 | return true; | |
182 | ||
183 | return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs + | |
184 | SM_I(sbi)->min_ssr_sections + reserved_sections(sbi)); | |
185 | } | |
186 | ||
187 | void register_inmem_page(struct inode *inode, struct page *page) | |
188 | { | |
189 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
190 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
191 | struct inmem_pages *new; | |
192 | ||
193 | f2fs_trace_pid(page); | |
194 | ||
195 | set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE); | |
196 | SetPagePrivate(page); | |
197 | ||
198 | new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS); | |
199 | ||
200 | /* add atomic page indices to the list */ | |
201 | new->page = page; | |
202 | INIT_LIST_HEAD(&new->list); | |
203 | ||
204 | /* increase reference count with clean state */ | |
205 | mutex_lock(&fi->inmem_lock); | |
206 | get_page(page); | |
207 | list_add_tail(&new->list, &fi->inmem_pages); | |
208 | spin_lock(&sbi->inode_lock[ATOMIC_FILE]); | |
209 | if (list_empty(&fi->inmem_ilist)) | |
210 | list_add_tail(&fi->inmem_ilist, &sbi->inode_list[ATOMIC_FILE]); | |
211 | spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); | |
212 | inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES); | |
213 | mutex_unlock(&fi->inmem_lock); | |
214 | ||
215 | trace_f2fs_register_inmem_page(page, INMEM); | |
216 | } | |
217 | ||
218 | static int __revoke_inmem_pages(struct inode *inode, | |
219 | struct list_head *head, bool drop, bool recover) | |
220 | { | |
221 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
222 | struct inmem_pages *cur, *tmp; | |
223 | int err = 0; | |
224 | ||
225 | list_for_each_entry_safe(cur, tmp, head, list) { | |
226 | struct page *page = cur->page; | |
227 | ||
228 | if (drop) | |
229 | trace_f2fs_commit_inmem_page(page, INMEM_DROP); | |
230 | ||
231 | lock_page(page); | |
232 | ||
233 | if (recover) { | |
234 | struct dnode_of_data dn; | |
235 | struct node_info ni; | |
236 | ||
237 | trace_f2fs_commit_inmem_page(page, INMEM_REVOKE); | |
238 | retry: | |
239 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
240 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); | |
241 | if (err) { | |
242 | if (err == -ENOMEM) { | |
243 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
244 | cond_resched(); | |
245 | goto retry; | |
246 | } | |
247 | err = -EAGAIN; | |
248 | goto next; | |
249 | } | |
250 | get_node_info(sbi, dn.nid, &ni); | |
251 | if (cur->old_addr == NEW_ADDR) { | |
252 | invalidate_blocks(sbi, dn.data_blkaddr); | |
253 | f2fs_update_data_blkaddr(&dn, NEW_ADDR); | |
254 | } else | |
255 | f2fs_replace_block(sbi, &dn, dn.data_blkaddr, | |
256 | cur->old_addr, ni.version, true, true); | |
257 | f2fs_put_dnode(&dn); | |
258 | } | |
259 | next: | |
260 | /* we don't need to invalidate this in the sccessful status */ | |
261 | if (drop || recover) | |
262 | ClearPageUptodate(page); | |
263 | set_page_private(page, 0); | |
264 | ClearPagePrivate(page); | |
265 | f2fs_put_page(page, 1); | |
266 | ||
267 | list_del(&cur->list); | |
268 | kmem_cache_free(inmem_entry_slab, cur); | |
269 | dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES); | |
270 | } | |
271 | return err; | |
272 | } | |
273 | ||
274 | void drop_inmem_pages_all(struct f2fs_sb_info *sbi) | |
275 | { | |
276 | struct list_head *head = &sbi->inode_list[ATOMIC_FILE]; | |
277 | struct inode *inode; | |
278 | struct f2fs_inode_info *fi; | |
279 | next: | |
280 | spin_lock(&sbi->inode_lock[ATOMIC_FILE]); | |
281 | if (list_empty(head)) { | |
282 | spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); | |
283 | return; | |
284 | } | |
285 | fi = list_first_entry(head, struct f2fs_inode_info, inmem_ilist); | |
286 | inode = igrab(&fi->vfs_inode); | |
287 | spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); | |
288 | ||
289 | if (inode) { | |
290 | drop_inmem_pages(inode); | |
291 | iput(inode); | |
292 | } | |
293 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
294 | cond_resched(); | |
295 | goto next; | |
296 | } | |
297 | ||
298 | void drop_inmem_pages(struct inode *inode) | |
299 | { | |
300 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
301 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
302 | ||
303 | mutex_lock(&fi->inmem_lock); | |
304 | __revoke_inmem_pages(inode, &fi->inmem_pages, true, false); | |
305 | spin_lock(&sbi->inode_lock[ATOMIC_FILE]); | |
306 | if (!list_empty(&fi->inmem_ilist)) | |
307 | list_del_init(&fi->inmem_ilist); | |
308 | spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); | |
309 | mutex_unlock(&fi->inmem_lock); | |
310 | ||
311 | clear_inode_flag(inode, FI_ATOMIC_FILE); | |
312 | clear_inode_flag(inode, FI_HOT_DATA); | |
313 | stat_dec_atomic_write(inode); | |
314 | } | |
315 | ||
316 | void drop_inmem_page(struct inode *inode, struct page *page) | |
317 | { | |
318 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
319 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
320 | struct list_head *head = &fi->inmem_pages; | |
321 | struct inmem_pages *cur = NULL; | |
322 | ||
323 | f2fs_bug_on(sbi, !IS_ATOMIC_WRITTEN_PAGE(page)); | |
324 | ||
325 | mutex_lock(&fi->inmem_lock); | |
326 | list_for_each_entry(cur, head, list) { | |
327 | if (cur->page == page) | |
328 | break; | |
329 | } | |
330 | ||
331 | f2fs_bug_on(sbi, !cur || cur->page != page); | |
332 | list_del(&cur->list); | |
333 | mutex_unlock(&fi->inmem_lock); | |
334 | ||
335 | dec_page_count(sbi, F2FS_INMEM_PAGES); | |
336 | kmem_cache_free(inmem_entry_slab, cur); | |
337 | ||
338 | ClearPageUptodate(page); | |
339 | set_page_private(page, 0); | |
340 | ClearPagePrivate(page); | |
341 | f2fs_put_page(page, 0); | |
342 | ||
343 | trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE); | |
344 | } | |
345 | ||
346 | static int __commit_inmem_pages(struct inode *inode, | |
347 | struct list_head *revoke_list) | |
348 | { | |
349 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
350 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
351 | struct inmem_pages *cur, *tmp; | |
352 | struct f2fs_io_info fio = { | |
353 | .sbi = sbi, | |
354 | .ino = inode->i_ino, | |
355 | .type = DATA, | |
356 | .op = REQ_OP_WRITE, | |
357 | .op_flags = REQ_SYNC | REQ_PRIO, | |
358 | .io_type = FS_DATA_IO, | |
359 | }; | |
360 | pgoff_t last_idx = ULONG_MAX; | |
361 | int err = 0; | |
362 | ||
363 | list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) { | |
364 | struct page *page = cur->page; | |
365 | ||
366 | lock_page(page); | |
367 | if (page->mapping == inode->i_mapping) { | |
368 | trace_f2fs_commit_inmem_page(page, INMEM); | |
369 | ||
370 | set_page_dirty(page); | |
371 | f2fs_wait_on_page_writeback(page, DATA, true); | |
372 | if (clear_page_dirty_for_io(page)) { | |
373 | inode_dec_dirty_pages(inode); | |
374 | remove_dirty_inode(inode); | |
375 | } | |
376 | retry: | |
377 | fio.page = page; | |
378 | fio.old_blkaddr = NULL_ADDR; | |
379 | fio.encrypted_page = NULL; | |
380 | fio.need_lock = LOCK_DONE; | |
381 | err = do_write_data_page(&fio); | |
382 | if (err) { | |
383 | if (err == -ENOMEM) { | |
384 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
385 | cond_resched(); | |
386 | goto retry; | |
387 | } | |
388 | unlock_page(page); | |
389 | break; | |
390 | } | |
391 | /* record old blkaddr for revoking */ | |
392 | cur->old_addr = fio.old_blkaddr; | |
393 | last_idx = page->index; | |
394 | } | |
395 | unlock_page(page); | |
396 | list_move_tail(&cur->list, revoke_list); | |
397 | } | |
398 | ||
399 | if (last_idx != ULONG_MAX) | |
400 | f2fs_submit_merged_write_cond(sbi, inode, 0, last_idx, DATA); | |
401 | ||
402 | if (!err) | |
403 | __revoke_inmem_pages(inode, revoke_list, false, false); | |
404 | ||
405 | return err; | |
406 | } | |
407 | ||
408 | int commit_inmem_pages(struct inode *inode) | |
409 | { | |
410 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
411 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
412 | struct list_head revoke_list; | |
413 | int err; | |
414 | ||
415 | INIT_LIST_HEAD(&revoke_list); | |
416 | f2fs_balance_fs(sbi, true); | |
417 | f2fs_lock_op(sbi); | |
418 | ||
419 | set_inode_flag(inode, FI_ATOMIC_COMMIT); | |
420 | ||
421 | mutex_lock(&fi->inmem_lock); | |
422 | err = __commit_inmem_pages(inode, &revoke_list); | |
423 | if (err) { | |
424 | int ret; | |
425 | /* | |
426 | * try to revoke all committed pages, but still we could fail | |
427 | * due to no memory or other reason, if that happened, EAGAIN | |
428 | * will be returned, which means in such case, transaction is | |
429 | * already not integrity, caller should use journal to do the | |
430 | * recovery or rewrite & commit last transaction. For other | |
431 | * error number, revoking was done by filesystem itself. | |
432 | */ | |
433 | ret = __revoke_inmem_pages(inode, &revoke_list, false, true); | |
434 | if (ret) | |
435 | err = ret; | |
436 | ||
437 | /* drop all uncommitted pages */ | |
438 | __revoke_inmem_pages(inode, &fi->inmem_pages, true, false); | |
439 | } | |
440 | spin_lock(&sbi->inode_lock[ATOMIC_FILE]); | |
441 | if (!list_empty(&fi->inmem_ilist)) | |
442 | list_del_init(&fi->inmem_ilist); | |
443 | spin_unlock(&sbi->inode_lock[ATOMIC_FILE]); | |
444 | mutex_unlock(&fi->inmem_lock); | |
445 | ||
446 | clear_inode_flag(inode, FI_ATOMIC_COMMIT); | |
447 | ||
448 | f2fs_unlock_op(sbi); | |
449 | return err; | |
450 | } | |
451 | ||
452 | /* | |
453 | * This function balances dirty node and dentry pages. | |
454 | * In addition, it controls garbage collection. | |
455 | */ | |
456 | void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need) | |
457 | { | |
458 | #ifdef CONFIG_F2FS_FAULT_INJECTION | |
459 | if (time_to_inject(sbi, FAULT_CHECKPOINT)) { | |
460 | f2fs_show_injection_info(FAULT_CHECKPOINT); | |
461 | f2fs_stop_checkpoint(sbi, false); | |
462 | } | |
463 | #endif | |
464 | ||
465 | /* balance_fs_bg is able to be pending */ | |
466 | if (need && excess_cached_nats(sbi)) | |
467 | f2fs_balance_fs_bg(sbi); | |
468 | ||
469 | /* | |
470 | * We should do GC or end up with checkpoint, if there are so many dirty | |
471 | * dir/node pages without enough free segments. | |
472 | */ | |
473 | if (has_not_enough_free_secs(sbi, 0, 0)) { | |
474 | mutex_lock(&sbi->gc_mutex); | |
475 | f2fs_gc(sbi, false, false, NULL_SEGNO); | |
476 | } | |
477 | } | |
478 | ||
479 | void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi) | |
480 | { | |
481 | /* try to shrink extent cache when there is no enough memory */ | |
482 | if (!available_free_memory(sbi, EXTENT_CACHE)) | |
483 | f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER); | |
484 | ||
485 | /* check the # of cached NAT entries */ | |
486 | if (!available_free_memory(sbi, NAT_ENTRIES)) | |
487 | try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK); | |
488 | ||
489 | if (!available_free_memory(sbi, FREE_NIDS)) | |
490 | try_to_free_nids(sbi, MAX_FREE_NIDS); | |
491 | else | |
492 | build_free_nids(sbi, false, false); | |
493 | ||
494 | if (!is_idle(sbi) && !excess_dirty_nats(sbi)) | |
495 | return; | |
496 | ||
497 | /* checkpoint is the only way to shrink partial cached entries */ | |
498 | if (!available_free_memory(sbi, NAT_ENTRIES) || | |
499 | !available_free_memory(sbi, INO_ENTRIES) || | |
500 | excess_prefree_segs(sbi) || | |
501 | excess_dirty_nats(sbi) || | |
502 | f2fs_time_over(sbi, CP_TIME)) { | |
503 | if (test_opt(sbi, DATA_FLUSH)) { | |
504 | struct blk_plug plug; | |
505 | ||
506 | blk_start_plug(&plug); | |
507 | sync_dirty_inodes(sbi, FILE_INODE); | |
508 | blk_finish_plug(&plug); | |
509 | } | |
510 | f2fs_sync_fs(sbi->sb, true); | |
511 | stat_inc_bg_cp_count(sbi->stat_info); | |
512 | } | |
513 | } | |
514 | ||
515 | static int __submit_flush_wait(struct f2fs_sb_info *sbi, | |
516 | struct block_device *bdev) | |
517 | { | |
518 | struct bio *bio = f2fs_bio_alloc(sbi, 0, true); | |
519 | int ret; | |
520 | ||
521 | bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH; | |
522 | bio_set_dev(bio, bdev); | |
523 | ret = submit_bio_wait(bio); | |
524 | bio_put(bio); | |
525 | ||
526 | trace_f2fs_issue_flush(bdev, test_opt(sbi, NOBARRIER), | |
527 | test_opt(sbi, FLUSH_MERGE), ret); | |
528 | return ret; | |
529 | } | |
530 | ||
531 | static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino) | |
532 | { | |
533 | int ret = 0; | |
534 | int i; | |
535 | ||
536 | if (!sbi->s_ndevs) | |
537 | return __submit_flush_wait(sbi, sbi->sb->s_bdev); | |
538 | ||
539 | for (i = 0; i < sbi->s_ndevs; i++) { | |
540 | if (!is_dirty_device(sbi, ino, i, FLUSH_INO)) | |
541 | continue; | |
542 | ret = __submit_flush_wait(sbi, FDEV(i).bdev); | |
543 | if (ret) | |
544 | break; | |
545 | } | |
546 | return ret; | |
547 | } | |
548 | ||
549 | static int issue_flush_thread(void *data) | |
550 | { | |
551 | struct f2fs_sb_info *sbi = data; | |
552 | struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; | |
553 | wait_queue_head_t *q = &fcc->flush_wait_queue; | |
554 | repeat: | |
555 | if (kthread_should_stop()) | |
556 | return 0; | |
557 | ||
558 | sb_start_intwrite(sbi->sb); | |
559 | ||
560 | if (!llist_empty(&fcc->issue_list)) { | |
561 | struct flush_cmd *cmd, *next; | |
562 | int ret; | |
563 | ||
564 | fcc->dispatch_list = llist_del_all(&fcc->issue_list); | |
565 | fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list); | |
566 | ||
567 | cmd = llist_entry(fcc->dispatch_list, struct flush_cmd, llnode); | |
568 | ||
569 | ret = submit_flush_wait(sbi, cmd->ino); | |
570 | atomic_inc(&fcc->issued_flush); | |
571 | ||
572 | llist_for_each_entry_safe(cmd, next, | |
573 | fcc->dispatch_list, llnode) { | |
574 | cmd->ret = ret; | |
575 | complete(&cmd->wait); | |
576 | } | |
577 | fcc->dispatch_list = NULL; | |
578 | } | |
579 | ||
580 | sb_end_intwrite(sbi->sb); | |
581 | ||
582 | wait_event_interruptible(*q, | |
583 | kthread_should_stop() || !llist_empty(&fcc->issue_list)); | |
584 | goto repeat; | |
585 | } | |
586 | ||
587 | int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino) | |
588 | { | |
589 | struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; | |
590 | struct flush_cmd cmd; | |
591 | int ret; | |
592 | ||
593 | if (test_opt(sbi, NOBARRIER)) | |
594 | return 0; | |
595 | ||
596 | if (!test_opt(sbi, FLUSH_MERGE)) { | |
597 | ret = submit_flush_wait(sbi, ino); | |
598 | atomic_inc(&fcc->issued_flush); | |
599 | return ret; | |
600 | } | |
601 | ||
602 | if (atomic_inc_return(&fcc->issing_flush) == 1 || sbi->s_ndevs > 1) { | |
603 | ret = submit_flush_wait(sbi, ino); | |
604 | atomic_dec(&fcc->issing_flush); | |
605 | ||
606 | atomic_inc(&fcc->issued_flush); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | cmd.ino = ino; | |
611 | init_completion(&cmd.wait); | |
612 | ||
613 | llist_add(&cmd.llnode, &fcc->issue_list); | |
614 | ||
615 | /* update issue_list before we wake up issue_flush thread */ | |
616 | smp_mb(); | |
617 | ||
618 | if (waitqueue_active(&fcc->flush_wait_queue)) | |
619 | wake_up(&fcc->flush_wait_queue); | |
620 | ||
621 | if (fcc->f2fs_issue_flush) { | |
622 | wait_for_completion(&cmd.wait); | |
623 | atomic_dec(&fcc->issing_flush); | |
624 | } else { | |
625 | struct llist_node *list; | |
626 | ||
627 | list = llist_del_all(&fcc->issue_list); | |
628 | if (!list) { | |
629 | wait_for_completion(&cmd.wait); | |
630 | atomic_dec(&fcc->issing_flush); | |
631 | } else { | |
632 | struct flush_cmd *tmp, *next; | |
633 | ||
634 | ret = submit_flush_wait(sbi, ino); | |
635 | ||
636 | llist_for_each_entry_safe(tmp, next, list, llnode) { | |
637 | if (tmp == &cmd) { | |
638 | cmd.ret = ret; | |
639 | atomic_dec(&fcc->issing_flush); | |
640 | continue; | |
641 | } | |
642 | tmp->ret = ret; | |
643 | complete(&tmp->wait); | |
644 | } | |
645 | } | |
646 | } | |
647 | ||
648 | return cmd.ret; | |
649 | } | |
650 | ||
651 | int create_flush_cmd_control(struct f2fs_sb_info *sbi) | |
652 | { | |
653 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
654 | struct flush_cmd_control *fcc; | |
655 | int err = 0; | |
656 | ||
657 | if (SM_I(sbi)->fcc_info) { | |
658 | fcc = SM_I(sbi)->fcc_info; | |
659 | if (fcc->f2fs_issue_flush) | |
660 | return err; | |
661 | goto init_thread; | |
662 | } | |
663 | ||
664 | fcc = f2fs_kzalloc(sbi, sizeof(struct flush_cmd_control), GFP_KERNEL); | |
665 | if (!fcc) | |
666 | return -ENOMEM; | |
667 | atomic_set(&fcc->issued_flush, 0); | |
668 | atomic_set(&fcc->issing_flush, 0); | |
669 | init_waitqueue_head(&fcc->flush_wait_queue); | |
670 | init_llist_head(&fcc->issue_list); | |
671 | SM_I(sbi)->fcc_info = fcc; | |
672 | if (!test_opt(sbi, FLUSH_MERGE)) | |
673 | return err; | |
674 | ||
675 | init_thread: | |
676 | fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi, | |
677 | "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); | |
678 | if (IS_ERR(fcc->f2fs_issue_flush)) { | |
679 | err = PTR_ERR(fcc->f2fs_issue_flush); | |
680 | kfree(fcc); | |
681 | SM_I(sbi)->fcc_info = NULL; | |
682 | return err; | |
683 | } | |
684 | ||
685 | return err; | |
686 | } | |
687 | ||
688 | void destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free) | |
689 | { | |
690 | struct flush_cmd_control *fcc = SM_I(sbi)->fcc_info; | |
691 | ||
692 | if (fcc && fcc->f2fs_issue_flush) { | |
693 | struct task_struct *flush_thread = fcc->f2fs_issue_flush; | |
694 | ||
695 | fcc->f2fs_issue_flush = NULL; | |
696 | kthread_stop(flush_thread); | |
697 | } | |
698 | if (free) { | |
699 | kfree(fcc); | |
700 | SM_I(sbi)->fcc_info = NULL; | |
701 | } | |
702 | } | |
703 | ||
704 | int f2fs_flush_device_cache(struct f2fs_sb_info *sbi) | |
705 | { | |
706 | int ret = 0, i; | |
707 | ||
708 | if (!sbi->s_ndevs) | |
709 | return 0; | |
710 | ||
711 | for (i = 1; i < sbi->s_ndevs; i++) { | |
712 | if (!f2fs_test_bit(i, (char *)&sbi->dirty_device)) | |
713 | continue; | |
714 | ret = __submit_flush_wait(sbi, FDEV(i).bdev); | |
715 | if (ret) | |
716 | break; | |
717 | ||
718 | spin_lock(&sbi->dev_lock); | |
719 | f2fs_clear_bit(i, (char *)&sbi->dirty_device); | |
720 | spin_unlock(&sbi->dev_lock); | |
721 | } | |
722 | ||
723 | return ret; | |
724 | } | |
725 | ||
726 | static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
727 | enum dirty_type dirty_type) | |
728 | { | |
729 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
730 | ||
731 | /* need not be added */ | |
732 | if (IS_CURSEG(sbi, segno)) | |
733 | return; | |
734 | ||
735 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
736 | dirty_i->nr_dirty[dirty_type]++; | |
737 | ||
738 | if (dirty_type == DIRTY) { | |
739 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
740 | enum dirty_type t = sentry->type; | |
741 | ||
742 | if (unlikely(t >= DIRTY)) { | |
743 | f2fs_bug_on(sbi, 1); | |
744 | return; | |
745 | } | |
746 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t])) | |
747 | dirty_i->nr_dirty[t]++; | |
748 | } | |
749 | } | |
750 | ||
751 | static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
752 | enum dirty_type dirty_type) | |
753 | { | |
754 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
755 | ||
756 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
757 | dirty_i->nr_dirty[dirty_type]--; | |
758 | ||
759 | if (dirty_type == DIRTY) { | |
760 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
761 | enum dirty_type t = sentry->type; | |
762 | ||
763 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) | |
764 | dirty_i->nr_dirty[t]--; | |
765 | ||
766 | if (get_valid_blocks(sbi, segno, true) == 0) | |
767 | clear_bit(GET_SEC_FROM_SEG(sbi, segno), | |
768 | dirty_i->victim_secmap); | |
769 | } | |
770 | } | |
771 | ||
772 | /* | |
773 | * Should not occur error such as -ENOMEM. | |
774 | * Adding dirty entry into seglist is not critical operation. | |
775 | * If a given segment is one of current working segments, it won't be added. | |
776 | */ | |
777 | static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) | |
778 | { | |
779 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
780 | unsigned short valid_blocks; | |
781 | ||
782 | if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) | |
783 | return; | |
784 | ||
785 | mutex_lock(&dirty_i->seglist_lock); | |
786 | ||
787 | valid_blocks = get_valid_blocks(sbi, segno, false); | |
788 | ||
789 | if (valid_blocks == 0) { | |
790 | __locate_dirty_segment(sbi, segno, PRE); | |
791 | __remove_dirty_segment(sbi, segno, DIRTY); | |
792 | } else if (valid_blocks < sbi->blocks_per_seg) { | |
793 | __locate_dirty_segment(sbi, segno, DIRTY); | |
794 | } else { | |
795 | /* Recovery routine with SSR needs this */ | |
796 | __remove_dirty_segment(sbi, segno, DIRTY); | |
797 | } | |
798 | ||
799 | mutex_unlock(&dirty_i->seglist_lock); | |
800 | } | |
801 | ||
802 | static struct discard_cmd *__create_discard_cmd(struct f2fs_sb_info *sbi, | |
803 | struct block_device *bdev, block_t lstart, | |
804 | block_t start, block_t len) | |
805 | { | |
806 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
807 | struct list_head *pend_list; | |
808 | struct discard_cmd *dc; | |
809 | ||
810 | f2fs_bug_on(sbi, !len); | |
811 | ||
812 | pend_list = &dcc->pend_list[plist_idx(len)]; | |
813 | ||
814 | dc = f2fs_kmem_cache_alloc(discard_cmd_slab, GFP_NOFS); | |
815 | INIT_LIST_HEAD(&dc->list); | |
816 | dc->bdev = bdev; | |
817 | dc->lstart = lstart; | |
818 | dc->start = start; | |
819 | dc->len = len; | |
820 | dc->ref = 0; | |
821 | dc->state = D_PREP; | |
822 | dc->error = 0; | |
823 | init_completion(&dc->wait); | |
824 | list_add_tail(&dc->list, pend_list); | |
825 | atomic_inc(&dcc->discard_cmd_cnt); | |
826 | dcc->undiscard_blks += len; | |
827 | ||
828 | return dc; | |
829 | } | |
830 | ||
831 | static struct discard_cmd *__attach_discard_cmd(struct f2fs_sb_info *sbi, | |
832 | struct block_device *bdev, block_t lstart, | |
833 | block_t start, block_t len, | |
834 | struct rb_node *parent, struct rb_node **p) | |
835 | { | |
836 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
837 | struct discard_cmd *dc; | |
838 | ||
839 | dc = __create_discard_cmd(sbi, bdev, lstart, start, len); | |
840 | ||
841 | rb_link_node(&dc->rb_node, parent, p); | |
842 | rb_insert_color(&dc->rb_node, &dcc->root); | |
843 | ||
844 | return dc; | |
845 | } | |
846 | ||
847 | static void __detach_discard_cmd(struct discard_cmd_control *dcc, | |
848 | struct discard_cmd *dc) | |
849 | { | |
850 | if (dc->state == D_DONE) | |
851 | atomic_dec(&dcc->issing_discard); | |
852 | ||
853 | list_del(&dc->list); | |
854 | rb_erase(&dc->rb_node, &dcc->root); | |
855 | dcc->undiscard_blks -= dc->len; | |
856 | ||
857 | kmem_cache_free(discard_cmd_slab, dc); | |
858 | ||
859 | atomic_dec(&dcc->discard_cmd_cnt); | |
860 | } | |
861 | ||
862 | static void __remove_discard_cmd(struct f2fs_sb_info *sbi, | |
863 | struct discard_cmd *dc) | |
864 | { | |
865 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
866 | ||
867 | trace_f2fs_remove_discard(dc->bdev, dc->start, dc->len); | |
868 | ||
869 | f2fs_bug_on(sbi, dc->ref); | |
870 | ||
871 | if (dc->error == -EOPNOTSUPP) | |
872 | dc->error = 0; | |
873 | ||
874 | if (dc->error) | |
875 | f2fs_msg(sbi->sb, KERN_INFO, | |
876 | "Issue discard(%u, %u, %u) failed, ret: %d", | |
877 | dc->lstart, dc->start, dc->len, dc->error); | |
878 | __detach_discard_cmd(dcc, dc); | |
879 | } | |
880 | ||
881 | static void f2fs_submit_discard_endio(struct bio *bio) | |
882 | { | |
883 | struct discard_cmd *dc = (struct discard_cmd *)bio->bi_private; | |
884 | ||
885 | dc->error = blk_status_to_errno(bio->bi_status); | |
886 | dc->state = D_DONE; | |
887 | complete_all(&dc->wait); | |
888 | bio_put(bio); | |
889 | } | |
890 | ||
891 | static void __check_sit_bitmap(struct f2fs_sb_info *sbi, | |
892 | block_t start, block_t end) | |
893 | { | |
894 | #ifdef CONFIG_F2FS_CHECK_FS | |
895 | struct seg_entry *sentry; | |
896 | unsigned int segno; | |
897 | block_t blk = start; | |
898 | unsigned long offset, size, max_blocks = sbi->blocks_per_seg; | |
899 | unsigned long *map; | |
900 | ||
901 | while (blk < end) { | |
902 | segno = GET_SEGNO(sbi, blk); | |
903 | sentry = get_seg_entry(sbi, segno); | |
904 | offset = GET_BLKOFF_FROM_SEG0(sbi, blk); | |
905 | ||
906 | if (end < START_BLOCK(sbi, segno + 1)) | |
907 | size = GET_BLKOFF_FROM_SEG0(sbi, end); | |
908 | else | |
909 | size = max_blocks; | |
910 | map = (unsigned long *)(sentry->cur_valid_map); | |
911 | offset = __find_rev_next_bit(map, size, offset); | |
912 | f2fs_bug_on(sbi, offset != size); | |
913 | blk = START_BLOCK(sbi, segno + 1); | |
914 | } | |
915 | #endif | |
916 | } | |
917 | ||
918 | /* this function is copied from blkdev_issue_discard from block/blk-lib.c */ | |
919 | static void __submit_discard_cmd(struct f2fs_sb_info *sbi, | |
920 | struct discard_policy *dpolicy, | |
921 | struct discard_cmd *dc) | |
922 | { | |
923 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
924 | struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ? | |
925 | &(dcc->fstrim_list) : &(dcc->wait_list); | |
926 | struct bio *bio = NULL; | |
927 | int flag = dpolicy->sync ? REQ_SYNC : 0; | |
928 | ||
929 | if (dc->state != D_PREP) | |
930 | return; | |
931 | ||
932 | trace_f2fs_issue_discard(dc->bdev, dc->start, dc->len); | |
933 | ||
934 | dc->error = __blkdev_issue_discard(dc->bdev, | |
935 | SECTOR_FROM_BLOCK(dc->start), | |
936 | SECTOR_FROM_BLOCK(dc->len), | |
937 | GFP_NOFS, 0, &bio); | |
938 | if (!dc->error) { | |
939 | /* should keep before submission to avoid D_DONE right away */ | |
940 | dc->state = D_SUBMIT; | |
941 | atomic_inc(&dcc->issued_discard); | |
942 | atomic_inc(&dcc->issing_discard); | |
943 | if (bio) { | |
944 | bio->bi_private = dc; | |
945 | bio->bi_end_io = f2fs_submit_discard_endio; | |
946 | bio->bi_opf |= flag; | |
947 | submit_bio(bio); | |
948 | list_move_tail(&dc->list, wait_list); | |
949 | __check_sit_bitmap(sbi, dc->start, dc->start + dc->len); | |
950 | ||
951 | f2fs_update_iostat(sbi, FS_DISCARD, 1); | |
952 | } | |
953 | } else { | |
954 | __remove_discard_cmd(sbi, dc); | |
955 | } | |
956 | } | |
957 | ||
958 | static struct discard_cmd *__insert_discard_tree(struct f2fs_sb_info *sbi, | |
959 | struct block_device *bdev, block_t lstart, | |
960 | block_t start, block_t len, | |
961 | struct rb_node **insert_p, | |
962 | struct rb_node *insert_parent) | |
963 | { | |
964 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
965 | struct rb_node **p; | |
966 | struct rb_node *parent = NULL; | |
967 | struct discard_cmd *dc = NULL; | |
968 | ||
969 | if (insert_p && insert_parent) { | |
970 | parent = insert_parent; | |
971 | p = insert_p; | |
972 | goto do_insert; | |
973 | } | |
974 | ||
975 | p = __lookup_rb_tree_for_insert(sbi, &dcc->root, &parent, lstart); | |
976 | do_insert: | |
977 | dc = __attach_discard_cmd(sbi, bdev, lstart, start, len, parent, p); | |
978 | if (!dc) | |
979 | return NULL; | |
980 | ||
981 | return dc; | |
982 | } | |
983 | ||
984 | static void __relocate_discard_cmd(struct discard_cmd_control *dcc, | |
985 | struct discard_cmd *dc) | |
986 | { | |
987 | list_move_tail(&dc->list, &dcc->pend_list[plist_idx(dc->len)]); | |
988 | } | |
989 | ||
990 | static void __punch_discard_cmd(struct f2fs_sb_info *sbi, | |
991 | struct discard_cmd *dc, block_t blkaddr) | |
992 | { | |
993 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
994 | struct discard_info di = dc->di; | |
995 | bool modified = false; | |
996 | ||
997 | if (dc->state == D_DONE || dc->len == 1) { | |
998 | __remove_discard_cmd(sbi, dc); | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | dcc->undiscard_blks -= di.len; | |
1003 | ||
1004 | if (blkaddr > di.lstart) { | |
1005 | dc->len = blkaddr - dc->lstart; | |
1006 | dcc->undiscard_blks += dc->len; | |
1007 | __relocate_discard_cmd(dcc, dc); | |
1008 | modified = true; | |
1009 | } | |
1010 | ||
1011 | if (blkaddr < di.lstart + di.len - 1) { | |
1012 | if (modified) { | |
1013 | __insert_discard_tree(sbi, dc->bdev, blkaddr + 1, | |
1014 | di.start + blkaddr + 1 - di.lstart, | |
1015 | di.lstart + di.len - 1 - blkaddr, | |
1016 | NULL, NULL); | |
1017 | } else { | |
1018 | dc->lstart++; | |
1019 | dc->len--; | |
1020 | dc->start++; | |
1021 | dcc->undiscard_blks += dc->len; | |
1022 | __relocate_discard_cmd(dcc, dc); | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | static void __update_discard_tree_range(struct f2fs_sb_info *sbi, | |
1028 | struct block_device *bdev, block_t lstart, | |
1029 | block_t start, block_t len) | |
1030 | { | |
1031 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1032 | struct discard_cmd *prev_dc = NULL, *next_dc = NULL; | |
1033 | struct discard_cmd *dc; | |
1034 | struct discard_info di = {0}; | |
1035 | struct rb_node **insert_p = NULL, *insert_parent = NULL; | |
1036 | block_t end = lstart + len; | |
1037 | ||
1038 | mutex_lock(&dcc->cmd_lock); | |
1039 | ||
1040 | dc = (struct discard_cmd *)__lookup_rb_tree_ret(&dcc->root, | |
1041 | NULL, lstart, | |
1042 | (struct rb_entry **)&prev_dc, | |
1043 | (struct rb_entry **)&next_dc, | |
1044 | &insert_p, &insert_parent, true); | |
1045 | if (dc) | |
1046 | prev_dc = dc; | |
1047 | ||
1048 | if (!prev_dc) { | |
1049 | di.lstart = lstart; | |
1050 | di.len = next_dc ? next_dc->lstart - lstart : len; | |
1051 | di.len = min(di.len, len); | |
1052 | di.start = start; | |
1053 | } | |
1054 | ||
1055 | while (1) { | |
1056 | struct rb_node *node; | |
1057 | bool merged = false; | |
1058 | struct discard_cmd *tdc = NULL; | |
1059 | ||
1060 | if (prev_dc) { | |
1061 | di.lstart = prev_dc->lstart + prev_dc->len; | |
1062 | if (di.lstart < lstart) | |
1063 | di.lstart = lstart; | |
1064 | if (di.lstart >= end) | |
1065 | break; | |
1066 | ||
1067 | if (!next_dc || next_dc->lstart > end) | |
1068 | di.len = end - di.lstart; | |
1069 | else | |
1070 | di.len = next_dc->lstart - di.lstart; | |
1071 | di.start = start + di.lstart - lstart; | |
1072 | } | |
1073 | ||
1074 | if (!di.len) | |
1075 | goto next; | |
1076 | ||
1077 | if (prev_dc && prev_dc->state == D_PREP && | |
1078 | prev_dc->bdev == bdev && | |
1079 | __is_discard_back_mergeable(&di, &prev_dc->di)) { | |
1080 | prev_dc->di.len += di.len; | |
1081 | dcc->undiscard_blks += di.len; | |
1082 | __relocate_discard_cmd(dcc, prev_dc); | |
1083 | di = prev_dc->di; | |
1084 | tdc = prev_dc; | |
1085 | merged = true; | |
1086 | } | |
1087 | ||
1088 | if (next_dc && next_dc->state == D_PREP && | |
1089 | next_dc->bdev == bdev && | |
1090 | __is_discard_front_mergeable(&di, &next_dc->di)) { | |
1091 | next_dc->di.lstart = di.lstart; | |
1092 | next_dc->di.len += di.len; | |
1093 | next_dc->di.start = di.start; | |
1094 | dcc->undiscard_blks += di.len; | |
1095 | __relocate_discard_cmd(dcc, next_dc); | |
1096 | if (tdc) | |
1097 | __remove_discard_cmd(sbi, tdc); | |
1098 | merged = true; | |
1099 | } | |
1100 | ||
1101 | if (!merged) { | |
1102 | __insert_discard_tree(sbi, bdev, di.lstart, di.start, | |
1103 | di.len, NULL, NULL); | |
1104 | } | |
1105 | next: | |
1106 | prev_dc = next_dc; | |
1107 | if (!prev_dc) | |
1108 | break; | |
1109 | ||
1110 | node = rb_next(&prev_dc->rb_node); | |
1111 | next_dc = rb_entry_safe(node, struct discard_cmd, rb_node); | |
1112 | } | |
1113 | ||
1114 | mutex_unlock(&dcc->cmd_lock); | |
1115 | } | |
1116 | ||
1117 | static int __queue_discard_cmd(struct f2fs_sb_info *sbi, | |
1118 | struct block_device *bdev, block_t blkstart, block_t blklen) | |
1119 | { | |
1120 | block_t lblkstart = blkstart; | |
1121 | ||
1122 | trace_f2fs_queue_discard(bdev, blkstart, blklen); | |
1123 | ||
1124 | if (sbi->s_ndevs) { | |
1125 | int devi = f2fs_target_device_index(sbi, blkstart); | |
1126 | ||
1127 | blkstart -= FDEV(devi).start_blk; | |
1128 | } | |
1129 | __update_discard_tree_range(sbi, bdev, lblkstart, blkstart, blklen); | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | static void __issue_discard_cmd_range(struct f2fs_sb_info *sbi, | |
1134 | struct discard_policy *dpolicy, | |
1135 | unsigned int start, unsigned int end) | |
1136 | { | |
1137 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1138 | struct discard_cmd *prev_dc = NULL, *next_dc = NULL; | |
1139 | struct rb_node **insert_p = NULL, *insert_parent = NULL; | |
1140 | struct discard_cmd *dc; | |
1141 | struct blk_plug plug; | |
1142 | int issued; | |
1143 | ||
1144 | next: | |
1145 | issued = 0; | |
1146 | ||
1147 | mutex_lock(&dcc->cmd_lock); | |
1148 | f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root)); | |
1149 | ||
1150 | dc = (struct discard_cmd *)__lookup_rb_tree_ret(&dcc->root, | |
1151 | NULL, start, | |
1152 | (struct rb_entry **)&prev_dc, | |
1153 | (struct rb_entry **)&next_dc, | |
1154 | &insert_p, &insert_parent, true); | |
1155 | if (!dc) | |
1156 | dc = next_dc; | |
1157 | ||
1158 | blk_start_plug(&plug); | |
1159 | ||
1160 | while (dc && dc->lstart <= end) { | |
1161 | struct rb_node *node; | |
1162 | ||
1163 | if (dc->len < dpolicy->granularity) | |
1164 | goto skip; | |
1165 | ||
1166 | if (dc->state != D_PREP) { | |
1167 | list_move_tail(&dc->list, &dcc->fstrim_list); | |
1168 | goto skip; | |
1169 | } | |
1170 | ||
1171 | __submit_discard_cmd(sbi, dpolicy, dc); | |
1172 | ||
1173 | if (++issued >= dpolicy->max_requests) { | |
1174 | start = dc->lstart + dc->len; | |
1175 | ||
1176 | blk_finish_plug(&plug); | |
1177 | mutex_unlock(&dcc->cmd_lock); | |
1178 | ||
1179 | schedule(); | |
1180 | ||
1181 | goto next; | |
1182 | } | |
1183 | skip: | |
1184 | node = rb_next(&dc->rb_node); | |
1185 | dc = rb_entry_safe(node, struct discard_cmd, rb_node); | |
1186 | ||
1187 | if (fatal_signal_pending(current)) | |
1188 | break; | |
1189 | } | |
1190 | ||
1191 | blk_finish_plug(&plug); | |
1192 | mutex_unlock(&dcc->cmd_lock); | |
1193 | } | |
1194 | ||
1195 | static int __issue_discard_cmd(struct f2fs_sb_info *sbi, | |
1196 | struct discard_policy *dpolicy) | |
1197 | { | |
1198 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1199 | struct list_head *pend_list; | |
1200 | struct discard_cmd *dc, *tmp; | |
1201 | struct blk_plug plug; | |
1202 | int i, iter = 0, issued = 0; | |
1203 | bool io_interrupted = false; | |
1204 | ||
1205 | for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { | |
1206 | if (i + 1 < dpolicy->granularity) | |
1207 | break; | |
1208 | pend_list = &dcc->pend_list[i]; | |
1209 | ||
1210 | mutex_lock(&dcc->cmd_lock); | |
1211 | if (list_empty(pend_list)) | |
1212 | goto next; | |
1213 | f2fs_bug_on(sbi, !__check_rb_tree_consistence(sbi, &dcc->root)); | |
1214 | blk_start_plug(&plug); | |
1215 | list_for_each_entry_safe(dc, tmp, pend_list, list) { | |
1216 | f2fs_bug_on(sbi, dc->state != D_PREP); | |
1217 | ||
1218 | if (dpolicy->io_aware && i < dpolicy->io_aware_gran && | |
1219 | !is_idle(sbi)) { | |
1220 | io_interrupted = true; | |
1221 | goto skip; | |
1222 | } | |
1223 | ||
1224 | __submit_discard_cmd(sbi, dpolicy, dc); | |
1225 | issued++; | |
1226 | skip: | |
1227 | if (++iter >= dpolicy->max_requests) | |
1228 | break; | |
1229 | } | |
1230 | blk_finish_plug(&plug); | |
1231 | next: | |
1232 | mutex_unlock(&dcc->cmd_lock); | |
1233 | ||
1234 | if (iter >= dpolicy->max_requests) | |
1235 | break; | |
1236 | } | |
1237 | ||
1238 | if (!issued && io_interrupted) | |
1239 | issued = -1; | |
1240 | ||
1241 | return issued; | |
1242 | } | |
1243 | ||
1244 | static bool __drop_discard_cmd(struct f2fs_sb_info *sbi) | |
1245 | { | |
1246 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1247 | struct list_head *pend_list; | |
1248 | struct discard_cmd *dc, *tmp; | |
1249 | int i; | |
1250 | bool dropped = false; | |
1251 | ||
1252 | mutex_lock(&dcc->cmd_lock); | |
1253 | for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { | |
1254 | pend_list = &dcc->pend_list[i]; | |
1255 | list_for_each_entry_safe(dc, tmp, pend_list, list) { | |
1256 | f2fs_bug_on(sbi, dc->state != D_PREP); | |
1257 | __remove_discard_cmd(sbi, dc); | |
1258 | dropped = true; | |
1259 | } | |
1260 | } | |
1261 | mutex_unlock(&dcc->cmd_lock); | |
1262 | ||
1263 | return dropped; | |
1264 | } | |
1265 | ||
1266 | void drop_discard_cmd(struct f2fs_sb_info *sbi) | |
1267 | { | |
1268 | __drop_discard_cmd(sbi); | |
1269 | } | |
1270 | ||
1271 | static unsigned int __wait_one_discard_bio(struct f2fs_sb_info *sbi, | |
1272 | struct discard_cmd *dc) | |
1273 | { | |
1274 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1275 | unsigned int len = 0; | |
1276 | ||
1277 | wait_for_completion_io(&dc->wait); | |
1278 | mutex_lock(&dcc->cmd_lock); | |
1279 | f2fs_bug_on(sbi, dc->state != D_DONE); | |
1280 | dc->ref--; | |
1281 | if (!dc->ref) { | |
1282 | if (!dc->error) | |
1283 | len = dc->len; | |
1284 | __remove_discard_cmd(sbi, dc); | |
1285 | } | |
1286 | mutex_unlock(&dcc->cmd_lock); | |
1287 | ||
1288 | return len; | |
1289 | } | |
1290 | ||
1291 | static unsigned int __wait_discard_cmd_range(struct f2fs_sb_info *sbi, | |
1292 | struct discard_policy *dpolicy, | |
1293 | block_t start, block_t end) | |
1294 | { | |
1295 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1296 | struct list_head *wait_list = (dpolicy->type == DPOLICY_FSTRIM) ? | |
1297 | &(dcc->fstrim_list) : &(dcc->wait_list); | |
1298 | struct discard_cmd *dc, *tmp; | |
1299 | bool need_wait; | |
1300 | unsigned int trimmed = 0; | |
1301 | ||
1302 | next: | |
1303 | need_wait = false; | |
1304 | ||
1305 | mutex_lock(&dcc->cmd_lock); | |
1306 | list_for_each_entry_safe(dc, tmp, wait_list, list) { | |
1307 | if (dc->lstart + dc->len <= start || end <= dc->lstart) | |
1308 | continue; | |
1309 | if (dc->len < dpolicy->granularity) | |
1310 | continue; | |
1311 | if (dc->state == D_DONE && !dc->ref) { | |
1312 | wait_for_completion_io(&dc->wait); | |
1313 | if (!dc->error) | |
1314 | trimmed += dc->len; | |
1315 | __remove_discard_cmd(sbi, dc); | |
1316 | } else { | |
1317 | dc->ref++; | |
1318 | need_wait = true; | |
1319 | break; | |
1320 | } | |
1321 | } | |
1322 | mutex_unlock(&dcc->cmd_lock); | |
1323 | ||
1324 | if (need_wait) { | |
1325 | trimmed += __wait_one_discard_bio(sbi, dc); | |
1326 | goto next; | |
1327 | } | |
1328 | ||
1329 | return trimmed; | |
1330 | } | |
1331 | ||
1332 | static void __wait_all_discard_cmd(struct f2fs_sb_info *sbi, | |
1333 | struct discard_policy *dpolicy) | |
1334 | { | |
1335 | __wait_discard_cmd_range(sbi, dpolicy, 0, UINT_MAX); | |
1336 | } | |
1337 | ||
1338 | /* This should be covered by global mutex, &sit_i->sentry_lock */ | |
1339 | static void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1340 | { | |
1341 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1342 | struct discard_cmd *dc; | |
1343 | bool need_wait = false; | |
1344 | ||
1345 | mutex_lock(&dcc->cmd_lock); | |
1346 | dc = (struct discard_cmd *)__lookup_rb_tree(&dcc->root, NULL, blkaddr); | |
1347 | if (dc) { | |
1348 | if (dc->state == D_PREP) { | |
1349 | __punch_discard_cmd(sbi, dc, blkaddr); | |
1350 | } else { | |
1351 | dc->ref++; | |
1352 | need_wait = true; | |
1353 | } | |
1354 | } | |
1355 | mutex_unlock(&dcc->cmd_lock); | |
1356 | ||
1357 | if (need_wait) | |
1358 | __wait_one_discard_bio(sbi, dc); | |
1359 | } | |
1360 | ||
1361 | void stop_discard_thread(struct f2fs_sb_info *sbi) | |
1362 | { | |
1363 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1364 | ||
1365 | if (dcc && dcc->f2fs_issue_discard) { | |
1366 | struct task_struct *discard_thread = dcc->f2fs_issue_discard; | |
1367 | ||
1368 | dcc->f2fs_issue_discard = NULL; | |
1369 | kthread_stop(discard_thread); | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* This comes from f2fs_put_super */ | |
1374 | bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi) | |
1375 | { | |
1376 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1377 | struct discard_policy dpolicy; | |
1378 | bool dropped; | |
1379 | ||
1380 | init_discard_policy(&dpolicy, DPOLICY_UMOUNT, dcc->discard_granularity); | |
1381 | __issue_discard_cmd(sbi, &dpolicy); | |
1382 | dropped = __drop_discard_cmd(sbi); | |
1383 | __wait_all_discard_cmd(sbi, &dpolicy); | |
1384 | ||
1385 | return dropped; | |
1386 | } | |
1387 | ||
1388 | static int issue_discard_thread(void *data) | |
1389 | { | |
1390 | struct f2fs_sb_info *sbi = data; | |
1391 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1392 | wait_queue_head_t *q = &dcc->discard_wait_queue; | |
1393 | struct discard_policy dpolicy; | |
1394 | unsigned int wait_ms = DEF_MIN_DISCARD_ISSUE_TIME; | |
1395 | int issued; | |
1396 | ||
1397 | set_freezable(); | |
1398 | ||
1399 | do { | |
1400 | init_discard_policy(&dpolicy, DPOLICY_BG, | |
1401 | dcc->discard_granularity); | |
1402 | ||
1403 | wait_event_interruptible_timeout(*q, | |
1404 | kthread_should_stop() || freezing(current) || | |
1405 | dcc->discard_wake, | |
1406 | msecs_to_jiffies(wait_ms)); | |
1407 | if (try_to_freeze()) | |
1408 | continue; | |
1409 | if (kthread_should_stop()) | |
1410 | return 0; | |
1411 | ||
1412 | if (dcc->discard_wake) { | |
1413 | dcc->discard_wake = 0; | |
1414 | if (sbi->gc_thread && sbi->gc_thread->gc_urgent) | |
1415 | init_discard_policy(&dpolicy, | |
1416 | DPOLICY_FORCE, 1); | |
1417 | } | |
1418 | ||
1419 | sb_start_intwrite(sbi->sb); | |
1420 | ||
1421 | issued = __issue_discard_cmd(sbi, &dpolicy); | |
1422 | if (issued) { | |
1423 | __wait_all_discard_cmd(sbi, &dpolicy); | |
1424 | wait_ms = dpolicy.min_interval; | |
1425 | } else { | |
1426 | wait_ms = dpolicy.max_interval; | |
1427 | } | |
1428 | ||
1429 | sb_end_intwrite(sbi->sb); | |
1430 | ||
1431 | } while (!kthread_should_stop()); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | #ifdef CONFIG_BLK_DEV_ZONED | |
1436 | static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi, | |
1437 | struct block_device *bdev, block_t blkstart, block_t blklen) | |
1438 | { | |
1439 | sector_t sector, nr_sects; | |
1440 | block_t lblkstart = blkstart; | |
1441 | int devi = 0; | |
1442 | ||
1443 | if (sbi->s_ndevs) { | |
1444 | devi = f2fs_target_device_index(sbi, blkstart); | |
1445 | blkstart -= FDEV(devi).start_blk; | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * We need to know the type of the zone: for conventional zones, | |
1450 | * use regular discard if the drive supports it. For sequential | |
1451 | * zones, reset the zone write pointer. | |
1452 | */ | |
1453 | switch (get_blkz_type(sbi, bdev, blkstart)) { | |
1454 | ||
1455 | case BLK_ZONE_TYPE_CONVENTIONAL: | |
1456 | if (!blk_queue_discard(bdev_get_queue(bdev))) | |
1457 | return 0; | |
1458 | return __queue_discard_cmd(sbi, bdev, lblkstart, blklen); | |
1459 | case BLK_ZONE_TYPE_SEQWRITE_REQ: | |
1460 | case BLK_ZONE_TYPE_SEQWRITE_PREF: | |
1461 | sector = SECTOR_FROM_BLOCK(blkstart); | |
1462 | nr_sects = SECTOR_FROM_BLOCK(blklen); | |
1463 | ||
1464 | if (sector & (bdev_zone_sectors(bdev) - 1) || | |
1465 | nr_sects != bdev_zone_sectors(bdev)) { | |
1466 | f2fs_msg(sbi->sb, KERN_INFO, | |
1467 | "(%d) %s: Unaligned discard attempted (block %x + %x)", | |
1468 | devi, sbi->s_ndevs ? FDEV(devi).path: "", | |
1469 | blkstart, blklen); | |
1470 | return -EIO; | |
1471 | } | |
1472 | trace_f2fs_issue_reset_zone(bdev, blkstart); | |
1473 | return blkdev_reset_zones(bdev, sector, | |
1474 | nr_sects, GFP_NOFS); | |
1475 | default: | |
1476 | /* Unknown zone type: broken device ? */ | |
1477 | return -EIO; | |
1478 | } | |
1479 | } | |
1480 | #endif | |
1481 | ||
1482 | static int __issue_discard_async(struct f2fs_sb_info *sbi, | |
1483 | struct block_device *bdev, block_t blkstart, block_t blklen) | |
1484 | { | |
1485 | #ifdef CONFIG_BLK_DEV_ZONED | |
1486 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && | |
1487 | bdev_zoned_model(bdev) != BLK_ZONED_NONE) | |
1488 | return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen); | |
1489 | #endif | |
1490 | return __queue_discard_cmd(sbi, bdev, blkstart, blklen); | |
1491 | } | |
1492 | ||
1493 | static int f2fs_issue_discard(struct f2fs_sb_info *sbi, | |
1494 | block_t blkstart, block_t blklen) | |
1495 | { | |
1496 | sector_t start = blkstart, len = 0; | |
1497 | struct block_device *bdev; | |
1498 | struct seg_entry *se; | |
1499 | unsigned int offset; | |
1500 | block_t i; | |
1501 | int err = 0; | |
1502 | ||
1503 | bdev = f2fs_target_device(sbi, blkstart, NULL); | |
1504 | ||
1505 | for (i = blkstart; i < blkstart + blklen; i++, len++) { | |
1506 | if (i != start) { | |
1507 | struct block_device *bdev2 = | |
1508 | f2fs_target_device(sbi, i, NULL); | |
1509 | ||
1510 | if (bdev2 != bdev) { | |
1511 | err = __issue_discard_async(sbi, bdev, | |
1512 | start, len); | |
1513 | if (err) | |
1514 | return err; | |
1515 | bdev = bdev2; | |
1516 | start = i; | |
1517 | len = 0; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | se = get_seg_entry(sbi, GET_SEGNO(sbi, i)); | |
1522 | offset = GET_BLKOFF_FROM_SEG0(sbi, i); | |
1523 | ||
1524 | if (!f2fs_test_and_set_bit(offset, se->discard_map)) | |
1525 | sbi->discard_blks--; | |
1526 | } | |
1527 | ||
1528 | if (len) | |
1529 | err = __issue_discard_async(sbi, bdev, start, len); | |
1530 | return err; | |
1531 | } | |
1532 | ||
1533 | static bool add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc, | |
1534 | bool check_only) | |
1535 | { | |
1536 | int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); | |
1537 | int max_blocks = sbi->blocks_per_seg; | |
1538 | struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start); | |
1539 | unsigned long *cur_map = (unsigned long *)se->cur_valid_map; | |
1540 | unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; | |
1541 | unsigned long *discard_map = (unsigned long *)se->discard_map; | |
1542 | unsigned long *dmap = SIT_I(sbi)->tmp_map; | |
1543 | unsigned int start = 0, end = -1; | |
1544 | bool force = (cpc->reason & CP_DISCARD); | |
1545 | struct discard_entry *de = NULL; | |
1546 | struct list_head *head = &SM_I(sbi)->dcc_info->entry_list; | |
1547 | int i; | |
1548 | ||
1549 | if (se->valid_blocks == max_blocks || !f2fs_discard_en(sbi)) | |
1550 | return false; | |
1551 | ||
1552 | if (!force) { | |
1553 | if (!test_opt(sbi, DISCARD) || !se->valid_blocks || | |
1554 | SM_I(sbi)->dcc_info->nr_discards >= | |
1555 | SM_I(sbi)->dcc_info->max_discards) | |
1556 | return false; | |
1557 | } | |
1558 | ||
1559 | /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */ | |
1560 | for (i = 0; i < entries; i++) | |
1561 | dmap[i] = force ? ~ckpt_map[i] & ~discard_map[i] : | |
1562 | (cur_map[i] ^ ckpt_map[i]) & ckpt_map[i]; | |
1563 | ||
1564 | while (force || SM_I(sbi)->dcc_info->nr_discards <= | |
1565 | SM_I(sbi)->dcc_info->max_discards) { | |
1566 | start = __find_rev_next_bit(dmap, max_blocks, end + 1); | |
1567 | if (start >= max_blocks) | |
1568 | break; | |
1569 | ||
1570 | end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1); | |
1571 | if (force && start && end != max_blocks | |
1572 | && (end - start) < cpc->trim_minlen) | |
1573 | continue; | |
1574 | ||
1575 | if (check_only) | |
1576 | return true; | |
1577 | ||
1578 | if (!de) { | |
1579 | de = f2fs_kmem_cache_alloc(discard_entry_slab, | |
1580 | GFP_F2FS_ZERO); | |
1581 | de->start_blkaddr = START_BLOCK(sbi, cpc->trim_start); | |
1582 | list_add_tail(&de->list, head); | |
1583 | } | |
1584 | ||
1585 | for (i = start; i < end; i++) | |
1586 | __set_bit_le(i, (void *)de->discard_map); | |
1587 | ||
1588 | SM_I(sbi)->dcc_info->nr_discards += end - start; | |
1589 | } | |
1590 | return false; | |
1591 | } | |
1592 | ||
1593 | void release_discard_addrs(struct f2fs_sb_info *sbi) | |
1594 | { | |
1595 | struct list_head *head = &(SM_I(sbi)->dcc_info->entry_list); | |
1596 | struct discard_entry *entry, *this; | |
1597 | ||
1598 | /* drop caches */ | |
1599 | list_for_each_entry_safe(entry, this, head, list) { | |
1600 | list_del(&entry->list); | |
1601 | kmem_cache_free(discard_entry_slab, entry); | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Should call clear_prefree_segments after checkpoint is done. | |
1607 | */ | |
1608 | static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) | |
1609 | { | |
1610 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1611 | unsigned int segno; | |
1612 | ||
1613 | mutex_lock(&dirty_i->seglist_lock); | |
1614 | for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi)) | |
1615 | __set_test_and_free(sbi, segno); | |
1616 | mutex_unlock(&dirty_i->seglist_lock); | |
1617 | } | |
1618 | ||
1619 | void clear_prefree_segments(struct f2fs_sb_info *sbi, struct cp_control *cpc) | |
1620 | { | |
1621 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1622 | struct list_head *head = &dcc->entry_list; | |
1623 | struct discard_entry *entry, *this; | |
1624 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1625 | unsigned long *prefree_map = dirty_i->dirty_segmap[PRE]; | |
1626 | unsigned int start = 0, end = -1; | |
1627 | unsigned int secno, start_segno; | |
1628 | bool force = (cpc->reason & CP_DISCARD); | |
1629 | ||
1630 | mutex_lock(&dirty_i->seglist_lock); | |
1631 | ||
1632 | while (1) { | |
1633 | int i; | |
1634 | start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1); | |
1635 | if (start >= MAIN_SEGS(sbi)) | |
1636 | break; | |
1637 | end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi), | |
1638 | start + 1); | |
1639 | ||
1640 | for (i = start; i < end; i++) | |
1641 | clear_bit(i, prefree_map); | |
1642 | ||
1643 | dirty_i->nr_dirty[PRE] -= end - start; | |
1644 | ||
1645 | if (!test_opt(sbi, DISCARD)) | |
1646 | continue; | |
1647 | ||
1648 | if (force && start >= cpc->trim_start && | |
1649 | (end - 1) <= cpc->trim_end) | |
1650 | continue; | |
1651 | ||
1652 | if (!test_opt(sbi, LFS) || sbi->segs_per_sec == 1) { | |
1653 | f2fs_issue_discard(sbi, START_BLOCK(sbi, start), | |
1654 | (end - start) << sbi->log_blocks_per_seg); | |
1655 | continue; | |
1656 | } | |
1657 | next: | |
1658 | secno = GET_SEC_FROM_SEG(sbi, start); | |
1659 | start_segno = GET_SEG_FROM_SEC(sbi, secno); | |
1660 | if (!IS_CURSEC(sbi, secno) && | |
1661 | !get_valid_blocks(sbi, start, true)) | |
1662 | f2fs_issue_discard(sbi, START_BLOCK(sbi, start_segno), | |
1663 | sbi->segs_per_sec << sbi->log_blocks_per_seg); | |
1664 | ||
1665 | start = start_segno + sbi->segs_per_sec; | |
1666 | if (start < end) | |
1667 | goto next; | |
1668 | else | |
1669 | end = start - 1; | |
1670 | } | |
1671 | mutex_unlock(&dirty_i->seglist_lock); | |
1672 | ||
1673 | /* send small discards */ | |
1674 | list_for_each_entry_safe(entry, this, head, list) { | |
1675 | unsigned int cur_pos = 0, next_pos, len, total_len = 0; | |
1676 | bool is_valid = test_bit_le(0, entry->discard_map); | |
1677 | ||
1678 | find_next: | |
1679 | if (is_valid) { | |
1680 | next_pos = find_next_zero_bit_le(entry->discard_map, | |
1681 | sbi->blocks_per_seg, cur_pos); | |
1682 | len = next_pos - cur_pos; | |
1683 | ||
1684 | if (f2fs_sb_mounted_blkzoned(sbi->sb) || | |
1685 | (force && len < cpc->trim_minlen)) | |
1686 | goto skip; | |
1687 | ||
1688 | f2fs_issue_discard(sbi, entry->start_blkaddr + cur_pos, | |
1689 | len); | |
1690 | total_len += len; | |
1691 | } else { | |
1692 | next_pos = find_next_bit_le(entry->discard_map, | |
1693 | sbi->blocks_per_seg, cur_pos); | |
1694 | } | |
1695 | skip: | |
1696 | cur_pos = next_pos; | |
1697 | is_valid = !is_valid; | |
1698 | ||
1699 | if (cur_pos < sbi->blocks_per_seg) | |
1700 | goto find_next; | |
1701 | ||
1702 | list_del(&entry->list); | |
1703 | dcc->nr_discards -= total_len; | |
1704 | kmem_cache_free(discard_entry_slab, entry); | |
1705 | } | |
1706 | ||
1707 | wake_up_discard_thread(sbi, false); | |
1708 | } | |
1709 | ||
1710 | void init_discard_policy(struct discard_policy *dpolicy, | |
1711 | int discard_type, unsigned int granularity) | |
1712 | { | |
1713 | /* common policy */ | |
1714 | dpolicy->type = discard_type; | |
1715 | dpolicy->sync = true; | |
1716 | dpolicy->granularity = granularity; | |
1717 | ||
1718 | dpolicy->max_requests = DEF_MAX_DISCARD_REQUEST; | |
1719 | dpolicy->io_aware_gran = MAX_PLIST_NUM; | |
1720 | ||
1721 | if (discard_type == DPOLICY_BG) { | |
1722 | dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME; | |
1723 | dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME; | |
1724 | dpolicy->io_aware = true; | |
1725 | } else if (discard_type == DPOLICY_FORCE) { | |
1726 | dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME; | |
1727 | dpolicy->max_interval = DEF_MAX_DISCARD_ISSUE_TIME; | |
1728 | dpolicy->io_aware = true; | |
1729 | } else if (discard_type == DPOLICY_FSTRIM) { | |
1730 | dpolicy->io_aware = false; | |
1731 | } else if (discard_type == DPOLICY_UMOUNT) { | |
1732 | dpolicy->io_aware = false; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | static int create_discard_cmd_control(struct f2fs_sb_info *sbi) | |
1737 | { | |
1738 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
1739 | struct discard_cmd_control *dcc; | |
1740 | int err = 0, i; | |
1741 | ||
1742 | if (SM_I(sbi)->dcc_info) { | |
1743 | dcc = SM_I(sbi)->dcc_info; | |
1744 | goto init_thread; | |
1745 | } | |
1746 | ||
1747 | dcc = f2fs_kzalloc(sbi, sizeof(struct discard_cmd_control), GFP_KERNEL); | |
1748 | if (!dcc) | |
1749 | return -ENOMEM; | |
1750 | ||
1751 | dcc->discard_granularity = DEFAULT_DISCARD_GRANULARITY; | |
1752 | INIT_LIST_HEAD(&dcc->entry_list); | |
1753 | for (i = 0; i < MAX_PLIST_NUM; i++) | |
1754 | INIT_LIST_HEAD(&dcc->pend_list[i]); | |
1755 | INIT_LIST_HEAD(&dcc->wait_list); | |
1756 | INIT_LIST_HEAD(&dcc->fstrim_list); | |
1757 | mutex_init(&dcc->cmd_lock); | |
1758 | atomic_set(&dcc->issued_discard, 0); | |
1759 | atomic_set(&dcc->issing_discard, 0); | |
1760 | atomic_set(&dcc->discard_cmd_cnt, 0); | |
1761 | dcc->nr_discards = 0; | |
1762 | dcc->max_discards = MAIN_SEGS(sbi) << sbi->log_blocks_per_seg; | |
1763 | dcc->undiscard_blks = 0; | |
1764 | dcc->root = RB_ROOT; | |
1765 | ||
1766 | init_waitqueue_head(&dcc->discard_wait_queue); | |
1767 | SM_I(sbi)->dcc_info = dcc; | |
1768 | init_thread: | |
1769 | dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi, | |
1770 | "f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev)); | |
1771 | if (IS_ERR(dcc->f2fs_issue_discard)) { | |
1772 | err = PTR_ERR(dcc->f2fs_issue_discard); | |
1773 | kfree(dcc); | |
1774 | SM_I(sbi)->dcc_info = NULL; | |
1775 | return err; | |
1776 | } | |
1777 | ||
1778 | return err; | |
1779 | } | |
1780 | ||
1781 | static void destroy_discard_cmd_control(struct f2fs_sb_info *sbi) | |
1782 | { | |
1783 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
1784 | ||
1785 | if (!dcc) | |
1786 | return; | |
1787 | ||
1788 | stop_discard_thread(sbi); | |
1789 | ||
1790 | kfree(dcc); | |
1791 | SM_I(sbi)->dcc_info = NULL; | |
1792 | } | |
1793 | ||
1794 | static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) | |
1795 | { | |
1796 | struct sit_info *sit_i = SIT_I(sbi); | |
1797 | ||
1798 | if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) { | |
1799 | sit_i->dirty_sentries++; | |
1800 | return false; | |
1801 | } | |
1802 | ||
1803 | return true; | |
1804 | } | |
1805 | ||
1806 | static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, | |
1807 | unsigned int segno, int modified) | |
1808 | { | |
1809 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
1810 | se->type = type; | |
1811 | if (modified) | |
1812 | __mark_sit_entry_dirty(sbi, segno); | |
1813 | } | |
1814 | ||
1815 | static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) | |
1816 | { | |
1817 | struct seg_entry *se; | |
1818 | unsigned int segno, offset; | |
1819 | long int new_vblocks; | |
1820 | bool exist; | |
1821 | #ifdef CONFIG_F2FS_CHECK_FS | |
1822 | bool mir_exist; | |
1823 | #endif | |
1824 | ||
1825 | segno = GET_SEGNO(sbi, blkaddr); | |
1826 | ||
1827 | se = get_seg_entry(sbi, segno); | |
1828 | new_vblocks = se->valid_blocks + del; | |
1829 | offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); | |
1830 | ||
1831 | f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) || | |
1832 | (new_vblocks > sbi->blocks_per_seg))); | |
1833 | ||
1834 | se->valid_blocks = new_vblocks; | |
1835 | se->mtime = get_mtime(sbi); | |
1836 | SIT_I(sbi)->max_mtime = se->mtime; | |
1837 | ||
1838 | /* Update valid block bitmap */ | |
1839 | if (del > 0) { | |
1840 | exist = f2fs_test_and_set_bit(offset, se->cur_valid_map); | |
1841 | #ifdef CONFIG_F2FS_CHECK_FS | |
1842 | mir_exist = f2fs_test_and_set_bit(offset, | |
1843 | se->cur_valid_map_mir); | |
1844 | if (unlikely(exist != mir_exist)) { | |
1845 | f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error " | |
1846 | "when setting bitmap, blk:%u, old bit:%d", | |
1847 | blkaddr, exist); | |
1848 | f2fs_bug_on(sbi, 1); | |
1849 | } | |
1850 | #endif | |
1851 | if (unlikely(exist)) { | |
1852 | f2fs_msg(sbi->sb, KERN_ERR, | |
1853 | "Bitmap was wrongly set, blk:%u", blkaddr); | |
1854 | f2fs_bug_on(sbi, 1); | |
1855 | se->valid_blocks--; | |
1856 | del = 0; | |
1857 | } | |
1858 | ||
1859 | if (f2fs_discard_en(sbi) && | |
1860 | !f2fs_test_and_set_bit(offset, se->discard_map)) | |
1861 | sbi->discard_blks--; | |
1862 | ||
1863 | /* don't overwrite by SSR to keep node chain */ | |
1864 | if (se->type == CURSEG_WARM_NODE) { | |
1865 | if (!f2fs_test_and_set_bit(offset, se->ckpt_valid_map)) | |
1866 | se->ckpt_valid_blocks++; | |
1867 | } | |
1868 | } else { | |
1869 | exist = f2fs_test_and_clear_bit(offset, se->cur_valid_map); | |
1870 | #ifdef CONFIG_F2FS_CHECK_FS | |
1871 | mir_exist = f2fs_test_and_clear_bit(offset, | |
1872 | se->cur_valid_map_mir); | |
1873 | if (unlikely(exist != mir_exist)) { | |
1874 | f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error " | |
1875 | "when clearing bitmap, blk:%u, old bit:%d", | |
1876 | blkaddr, exist); | |
1877 | f2fs_bug_on(sbi, 1); | |
1878 | } | |
1879 | #endif | |
1880 | if (unlikely(!exist)) { | |
1881 | f2fs_msg(sbi->sb, KERN_ERR, | |
1882 | "Bitmap was wrongly cleared, blk:%u", blkaddr); | |
1883 | f2fs_bug_on(sbi, 1); | |
1884 | se->valid_blocks++; | |
1885 | del = 0; | |
1886 | } | |
1887 | ||
1888 | if (f2fs_discard_en(sbi) && | |
1889 | f2fs_test_and_clear_bit(offset, se->discard_map)) | |
1890 | sbi->discard_blks++; | |
1891 | } | |
1892 | if (!f2fs_test_bit(offset, se->ckpt_valid_map)) | |
1893 | se->ckpt_valid_blocks += del; | |
1894 | ||
1895 | __mark_sit_entry_dirty(sbi, segno); | |
1896 | ||
1897 | /* update total number of valid blocks to be written in ckpt area */ | |
1898 | SIT_I(sbi)->written_valid_blocks += del; | |
1899 | ||
1900 | if (sbi->segs_per_sec > 1) | |
1901 | get_sec_entry(sbi, segno)->valid_blocks += del; | |
1902 | } | |
1903 | ||
1904 | void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) | |
1905 | { | |
1906 | unsigned int segno = GET_SEGNO(sbi, addr); | |
1907 | struct sit_info *sit_i = SIT_I(sbi); | |
1908 | ||
1909 | f2fs_bug_on(sbi, addr == NULL_ADDR); | |
1910 | if (addr == NEW_ADDR) | |
1911 | return; | |
1912 | ||
1913 | /* add it into sit main buffer */ | |
1914 | down_write(&sit_i->sentry_lock); | |
1915 | ||
1916 | update_sit_entry(sbi, addr, -1); | |
1917 | ||
1918 | /* add it into dirty seglist */ | |
1919 | locate_dirty_segment(sbi, segno); | |
1920 | ||
1921 | up_write(&sit_i->sentry_lock); | |
1922 | } | |
1923 | ||
1924 | bool is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1925 | { | |
1926 | struct sit_info *sit_i = SIT_I(sbi); | |
1927 | unsigned int segno, offset; | |
1928 | struct seg_entry *se; | |
1929 | bool is_cp = false; | |
1930 | ||
1931 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) | |
1932 | return true; | |
1933 | ||
1934 | down_read(&sit_i->sentry_lock); | |
1935 | ||
1936 | segno = GET_SEGNO(sbi, blkaddr); | |
1937 | se = get_seg_entry(sbi, segno); | |
1938 | offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); | |
1939 | ||
1940 | if (f2fs_test_bit(offset, se->ckpt_valid_map)) | |
1941 | is_cp = true; | |
1942 | ||
1943 | up_read(&sit_i->sentry_lock); | |
1944 | ||
1945 | return is_cp; | |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * This function should be resided under the curseg_mutex lock | |
1950 | */ | |
1951 | static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, | |
1952 | struct f2fs_summary *sum) | |
1953 | { | |
1954 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
1955 | void *addr = curseg->sum_blk; | |
1956 | addr += curseg->next_blkoff * sizeof(struct f2fs_summary); | |
1957 | memcpy(addr, sum, sizeof(struct f2fs_summary)); | |
1958 | } | |
1959 | ||
1960 | /* | |
1961 | * Calculate the number of current summary pages for writing | |
1962 | */ | |
1963 | int npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra) | |
1964 | { | |
1965 | int valid_sum_count = 0; | |
1966 | int i, sum_in_page; | |
1967 | ||
1968 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1969 | if (sbi->ckpt->alloc_type[i] == SSR) | |
1970 | valid_sum_count += sbi->blocks_per_seg; | |
1971 | else { | |
1972 | if (for_ra) | |
1973 | valid_sum_count += le16_to_cpu( | |
1974 | F2FS_CKPT(sbi)->cur_data_blkoff[i]); | |
1975 | else | |
1976 | valid_sum_count += curseg_blkoff(sbi, i); | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE - | |
1981 | SUM_FOOTER_SIZE) / SUMMARY_SIZE; | |
1982 | if (valid_sum_count <= sum_in_page) | |
1983 | return 1; | |
1984 | else if ((valid_sum_count - sum_in_page) <= | |
1985 | (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE) | |
1986 | return 2; | |
1987 | return 3; | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | * Caller should put this summary page | |
1992 | */ | |
1993 | struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) | |
1994 | { | |
1995 | return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); | |
1996 | } | |
1997 | ||
1998 | void update_meta_page(struct f2fs_sb_info *sbi, void *src, block_t blk_addr) | |
1999 | { | |
2000 | struct page *page = grab_meta_page(sbi, blk_addr); | |
2001 | ||
2002 | memcpy(page_address(page), src, PAGE_SIZE); | |
2003 | set_page_dirty(page); | |
2004 | f2fs_put_page(page, 1); | |
2005 | } | |
2006 | ||
2007 | static void write_sum_page(struct f2fs_sb_info *sbi, | |
2008 | struct f2fs_summary_block *sum_blk, block_t blk_addr) | |
2009 | { | |
2010 | update_meta_page(sbi, (void *)sum_blk, blk_addr); | |
2011 | } | |
2012 | ||
2013 | static void write_current_sum_page(struct f2fs_sb_info *sbi, | |
2014 | int type, block_t blk_addr) | |
2015 | { | |
2016 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2017 | struct page *page = grab_meta_page(sbi, blk_addr); | |
2018 | struct f2fs_summary_block *src = curseg->sum_blk; | |
2019 | struct f2fs_summary_block *dst; | |
2020 | ||
2021 | dst = (struct f2fs_summary_block *)page_address(page); | |
2022 | ||
2023 | mutex_lock(&curseg->curseg_mutex); | |
2024 | ||
2025 | down_read(&curseg->journal_rwsem); | |
2026 | memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE); | |
2027 | up_read(&curseg->journal_rwsem); | |
2028 | ||
2029 | memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE); | |
2030 | memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE); | |
2031 | ||
2032 | mutex_unlock(&curseg->curseg_mutex); | |
2033 | ||
2034 | set_page_dirty(page); | |
2035 | f2fs_put_page(page, 1); | |
2036 | } | |
2037 | ||
2038 | static int is_next_segment_free(struct f2fs_sb_info *sbi, int type) | |
2039 | { | |
2040 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2041 | unsigned int segno = curseg->segno + 1; | |
2042 | struct free_segmap_info *free_i = FREE_I(sbi); | |
2043 | ||
2044 | if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec) | |
2045 | return !test_bit(segno, free_i->free_segmap); | |
2046 | return 0; | |
2047 | } | |
2048 | ||
2049 | /* | |
2050 | * Find a new segment from the free segments bitmap to right order | |
2051 | * This function should be returned with success, otherwise BUG | |
2052 | */ | |
2053 | static void get_new_segment(struct f2fs_sb_info *sbi, | |
2054 | unsigned int *newseg, bool new_sec, int dir) | |
2055 | { | |
2056 | struct free_segmap_info *free_i = FREE_I(sbi); | |
2057 | unsigned int segno, secno, zoneno; | |
2058 | unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone; | |
2059 | unsigned int hint = GET_SEC_FROM_SEG(sbi, *newseg); | |
2060 | unsigned int old_zoneno = GET_ZONE_FROM_SEG(sbi, *newseg); | |
2061 | unsigned int left_start = hint; | |
2062 | bool init = true; | |
2063 | int go_left = 0; | |
2064 | int i; | |
2065 | ||
2066 | spin_lock(&free_i->segmap_lock); | |
2067 | ||
2068 | if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { | |
2069 | segno = find_next_zero_bit(free_i->free_segmap, | |
2070 | GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1); | |
2071 | if (segno < GET_SEG_FROM_SEC(sbi, hint + 1)) | |
2072 | goto got_it; | |
2073 | } | |
2074 | find_other_zone: | |
2075 | secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint); | |
2076 | if (secno >= MAIN_SECS(sbi)) { | |
2077 | if (dir == ALLOC_RIGHT) { | |
2078 | secno = find_next_zero_bit(free_i->free_secmap, | |
2079 | MAIN_SECS(sbi), 0); | |
2080 | f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi)); | |
2081 | } else { | |
2082 | go_left = 1; | |
2083 | left_start = hint - 1; | |
2084 | } | |
2085 | } | |
2086 | if (go_left == 0) | |
2087 | goto skip_left; | |
2088 | ||
2089 | while (test_bit(left_start, free_i->free_secmap)) { | |
2090 | if (left_start > 0) { | |
2091 | left_start--; | |
2092 | continue; | |
2093 | } | |
2094 | left_start = find_next_zero_bit(free_i->free_secmap, | |
2095 | MAIN_SECS(sbi), 0); | |
2096 | f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi)); | |
2097 | break; | |
2098 | } | |
2099 | secno = left_start; | |
2100 | skip_left: | |
2101 | segno = GET_SEG_FROM_SEC(sbi, secno); | |
2102 | zoneno = GET_ZONE_FROM_SEC(sbi, secno); | |
2103 | ||
2104 | /* give up on finding another zone */ | |
2105 | if (!init) | |
2106 | goto got_it; | |
2107 | if (sbi->secs_per_zone == 1) | |
2108 | goto got_it; | |
2109 | if (zoneno == old_zoneno) | |
2110 | goto got_it; | |
2111 | if (dir == ALLOC_LEFT) { | |
2112 | if (!go_left && zoneno + 1 >= total_zones) | |
2113 | goto got_it; | |
2114 | if (go_left && zoneno == 0) | |
2115 | goto got_it; | |
2116 | } | |
2117 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
2118 | if (CURSEG_I(sbi, i)->zone == zoneno) | |
2119 | break; | |
2120 | ||
2121 | if (i < NR_CURSEG_TYPE) { | |
2122 | /* zone is in user, try another */ | |
2123 | if (go_left) | |
2124 | hint = zoneno * sbi->secs_per_zone - 1; | |
2125 | else if (zoneno + 1 >= total_zones) | |
2126 | hint = 0; | |
2127 | else | |
2128 | hint = (zoneno + 1) * sbi->secs_per_zone; | |
2129 | init = false; | |
2130 | goto find_other_zone; | |
2131 | } | |
2132 | got_it: | |
2133 | /* set it as dirty segment in free segmap */ | |
2134 | f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap)); | |
2135 | __set_inuse(sbi, segno); | |
2136 | *newseg = segno; | |
2137 | spin_unlock(&free_i->segmap_lock); | |
2138 | } | |
2139 | ||
2140 | static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) | |
2141 | { | |
2142 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2143 | struct summary_footer *sum_footer; | |
2144 | ||
2145 | curseg->segno = curseg->next_segno; | |
2146 | curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno); | |
2147 | curseg->next_blkoff = 0; | |
2148 | curseg->next_segno = NULL_SEGNO; | |
2149 | ||
2150 | sum_footer = &(curseg->sum_blk->footer); | |
2151 | memset(sum_footer, 0, sizeof(struct summary_footer)); | |
2152 | if (IS_DATASEG(type)) | |
2153 | SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); | |
2154 | if (IS_NODESEG(type)) | |
2155 | SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); | |
2156 | __set_sit_entry_type(sbi, type, curseg->segno, modified); | |
2157 | } | |
2158 | ||
2159 | static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type) | |
2160 | { | |
2161 | /* if segs_per_sec is large than 1, we need to keep original policy. */ | |
2162 | if (sbi->segs_per_sec != 1) | |
2163 | return CURSEG_I(sbi, type)->segno; | |
2164 | ||
2165 | if (type == CURSEG_HOT_DATA || IS_NODESEG(type)) | |
2166 | return 0; | |
2167 | ||
2168 | if (SIT_I(sbi)->last_victim[ALLOC_NEXT]) | |
2169 | return SIT_I(sbi)->last_victim[ALLOC_NEXT]; | |
2170 | return CURSEG_I(sbi, type)->segno; | |
2171 | } | |
2172 | ||
2173 | /* | |
2174 | * Allocate a current working segment. | |
2175 | * This function always allocates a free segment in LFS manner. | |
2176 | */ | |
2177 | static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) | |
2178 | { | |
2179 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2180 | unsigned int segno = curseg->segno; | |
2181 | int dir = ALLOC_LEFT; | |
2182 | ||
2183 | write_sum_page(sbi, curseg->sum_blk, | |
2184 | GET_SUM_BLOCK(sbi, segno)); | |
2185 | if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) | |
2186 | dir = ALLOC_RIGHT; | |
2187 | ||
2188 | if (test_opt(sbi, NOHEAP)) | |
2189 | dir = ALLOC_RIGHT; | |
2190 | ||
2191 | segno = __get_next_segno(sbi, type); | |
2192 | get_new_segment(sbi, &segno, new_sec, dir); | |
2193 | curseg->next_segno = segno; | |
2194 | reset_curseg(sbi, type, 1); | |
2195 | curseg->alloc_type = LFS; | |
2196 | } | |
2197 | ||
2198 | static void __next_free_blkoff(struct f2fs_sb_info *sbi, | |
2199 | struct curseg_info *seg, block_t start) | |
2200 | { | |
2201 | struct seg_entry *se = get_seg_entry(sbi, seg->segno); | |
2202 | int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); | |
2203 | unsigned long *target_map = SIT_I(sbi)->tmp_map; | |
2204 | unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; | |
2205 | unsigned long *cur_map = (unsigned long *)se->cur_valid_map; | |
2206 | int i, pos; | |
2207 | ||
2208 | for (i = 0; i < entries; i++) | |
2209 | target_map[i] = ckpt_map[i] | cur_map[i]; | |
2210 | ||
2211 | pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start); | |
2212 | ||
2213 | seg->next_blkoff = pos; | |
2214 | } | |
2215 | ||
2216 | /* | |
2217 | * If a segment is written by LFS manner, next block offset is just obtained | |
2218 | * by increasing the current block offset. However, if a segment is written by | |
2219 | * SSR manner, next block offset obtained by calling __next_free_blkoff | |
2220 | */ | |
2221 | static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, | |
2222 | struct curseg_info *seg) | |
2223 | { | |
2224 | if (seg->alloc_type == SSR) | |
2225 | __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); | |
2226 | else | |
2227 | seg->next_blkoff++; | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | * This function always allocates a used segment(from dirty seglist) by SSR | |
2232 | * manner, so it should recover the existing segment information of valid blocks | |
2233 | */ | |
2234 | static void change_curseg(struct f2fs_sb_info *sbi, int type) | |
2235 | { | |
2236 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
2237 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2238 | unsigned int new_segno = curseg->next_segno; | |
2239 | struct f2fs_summary_block *sum_node; | |
2240 | struct page *sum_page; | |
2241 | ||
2242 | write_sum_page(sbi, curseg->sum_blk, | |
2243 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
2244 | __set_test_and_inuse(sbi, new_segno); | |
2245 | ||
2246 | mutex_lock(&dirty_i->seglist_lock); | |
2247 | __remove_dirty_segment(sbi, new_segno, PRE); | |
2248 | __remove_dirty_segment(sbi, new_segno, DIRTY); | |
2249 | mutex_unlock(&dirty_i->seglist_lock); | |
2250 | ||
2251 | reset_curseg(sbi, type, 1); | |
2252 | curseg->alloc_type = SSR; | |
2253 | __next_free_blkoff(sbi, curseg, 0); | |
2254 | ||
2255 | sum_page = get_sum_page(sbi, new_segno); | |
2256 | sum_node = (struct f2fs_summary_block *)page_address(sum_page); | |
2257 | memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); | |
2258 | f2fs_put_page(sum_page, 1); | |
2259 | } | |
2260 | ||
2261 | static int get_ssr_segment(struct f2fs_sb_info *sbi, int type) | |
2262 | { | |
2263 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2264 | const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops; | |
2265 | unsigned segno = NULL_SEGNO; | |
2266 | int i, cnt; | |
2267 | bool reversed = false; | |
2268 | ||
2269 | /* need_SSR() already forces to do this */ | |
2270 | if (v_ops->get_victim(sbi, &segno, BG_GC, type, SSR)) { | |
2271 | curseg->next_segno = segno; | |
2272 | return 1; | |
2273 | } | |
2274 | ||
2275 | /* For node segments, let's do SSR more intensively */ | |
2276 | if (IS_NODESEG(type)) { | |
2277 | if (type >= CURSEG_WARM_NODE) { | |
2278 | reversed = true; | |
2279 | i = CURSEG_COLD_NODE; | |
2280 | } else { | |
2281 | i = CURSEG_HOT_NODE; | |
2282 | } | |
2283 | cnt = NR_CURSEG_NODE_TYPE; | |
2284 | } else { | |
2285 | if (type >= CURSEG_WARM_DATA) { | |
2286 | reversed = true; | |
2287 | i = CURSEG_COLD_DATA; | |
2288 | } else { | |
2289 | i = CURSEG_HOT_DATA; | |
2290 | } | |
2291 | cnt = NR_CURSEG_DATA_TYPE; | |
2292 | } | |
2293 | ||
2294 | for (; cnt-- > 0; reversed ? i-- : i++) { | |
2295 | if (i == type) | |
2296 | continue; | |
2297 | if (v_ops->get_victim(sbi, &segno, BG_GC, i, SSR)) { | |
2298 | curseg->next_segno = segno; | |
2299 | return 1; | |
2300 | } | |
2301 | } | |
2302 | return 0; | |
2303 | } | |
2304 | ||
2305 | /* | |
2306 | * flush out current segment and replace it with new segment | |
2307 | * This function should be returned with success, otherwise BUG | |
2308 | */ | |
2309 | static void allocate_segment_by_default(struct f2fs_sb_info *sbi, | |
2310 | int type, bool force) | |
2311 | { | |
2312 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2313 | ||
2314 | if (force) | |
2315 | new_curseg(sbi, type, true); | |
2316 | else if (!is_set_ckpt_flags(sbi, CP_CRC_RECOVERY_FLAG) && | |
2317 | type == CURSEG_WARM_NODE) | |
2318 | new_curseg(sbi, type, false); | |
2319 | else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type)) | |
2320 | new_curseg(sbi, type, false); | |
2321 | else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) | |
2322 | change_curseg(sbi, type); | |
2323 | else | |
2324 | new_curseg(sbi, type, false); | |
2325 | ||
2326 | stat_inc_seg_type(sbi, curseg); | |
2327 | } | |
2328 | ||
2329 | void allocate_new_segments(struct f2fs_sb_info *sbi) | |
2330 | { | |
2331 | struct curseg_info *curseg; | |
2332 | unsigned int old_segno; | |
2333 | int i; | |
2334 | ||
2335 | down_write(&SIT_I(sbi)->sentry_lock); | |
2336 | ||
2337 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
2338 | curseg = CURSEG_I(sbi, i); | |
2339 | old_segno = curseg->segno; | |
2340 | SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); | |
2341 | locate_dirty_segment(sbi, old_segno); | |
2342 | } | |
2343 | ||
2344 | up_write(&SIT_I(sbi)->sentry_lock); | |
2345 | } | |
2346 | ||
2347 | static const struct segment_allocation default_salloc_ops = { | |
2348 | .allocate_segment = allocate_segment_by_default, | |
2349 | }; | |
2350 | ||
2351 | bool exist_trim_candidates(struct f2fs_sb_info *sbi, struct cp_control *cpc) | |
2352 | { | |
2353 | __u64 trim_start = cpc->trim_start; | |
2354 | bool has_candidate = false; | |
2355 | ||
2356 | down_write(&SIT_I(sbi)->sentry_lock); | |
2357 | for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) { | |
2358 | if (add_discard_addrs(sbi, cpc, true)) { | |
2359 | has_candidate = true; | |
2360 | break; | |
2361 | } | |
2362 | } | |
2363 | up_write(&SIT_I(sbi)->sentry_lock); | |
2364 | ||
2365 | cpc->trim_start = trim_start; | |
2366 | return has_candidate; | |
2367 | } | |
2368 | ||
2369 | int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range) | |
2370 | { | |
2371 | __u64 start = F2FS_BYTES_TO_BLK(range->start); | |
2372 | __u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1; | |
2373 | unsigned int start_segno, end_segno, cur_segno; | |
2374 | block_t start_block, end_block; | |
2375 | struct cp_control cpc; | |
2376 | struct discard_policy dpolicy; | |
2377 | unsigned long long trimmed = 0; | |
2378 | int err = 0; | |
2379 | ||
2380 | if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize) | |
2381 | return -EINVAL; | |
2382 | ||
2383 | if (end <= MAIN_BLKADDR(sbi)) | |
2384 | goto out; | |
2385 | ||
2386 | if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) { | |
2387 | f2fs_msg(sbi->sb, KERN_WARNING, | |
2388 | "Found FS corruption, run fsck to fix."); | |
2389 | goto out; | |
2390 | } | |
2391 | ||
2392 | /* start/end segment number in main_area */ | |
2393 | start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start); | |
2394 | end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 : | |
2395 | GET_SEGNO(sbi, end); | |
2396 | ||
2397 | cpc.reason = CP_DISCARD; | |
2398 | cpc.trim_minlen = max_t(__u64, 1, F2FS_BYTES_TO_BLK(range->minlen)); | |
2399 | ||
2400 | /* do checkpoint to issue discard commands safely */ | |
2401 | for (cur_segno = start_segno; cur_segno <= end_segno; | |
2402 | cur_segno = cpc.trim_end + 1) { | |
2403 | cpc.trim_start = cur_segno; | |
2404 | ||
2405 | if (sbi->discard_blks == 0) | |
2406 | break; | |
2407 | else if (sbi->discard_blks < BATCHED_TRIM_BLOCKS(sbi)) | |
2408 | cpc.trim_end = end_segno; | |
2409 | else | |
2410 | cpc.trim_end = min_t(unsigned int, | |
2411 | rounddown(cur_segno + | |
2412 | BATCHED_TRIM_SEGMENTS(sbi), | |
2413 | sbi->segs_per_sec) - 1, end_segno); | |
2414 | ||
2415 | mutex_lock(&sbi->gc_mutex); | |
2416 | err = write_checkpoint(sbi, &cpc); | |
2417 | mutex_unlock(&sbi->gc_mutex); | |
2418 | if (err) | |
2419 | break; | |
2420 | ||
2421 | schedule(); | |
2422 | } | |
2423 | ||
2424 | start_block = START_BLOCK(sbi, start_segno); | |
2425 | end_block = START_BLOCK(sbi, min(cur_segno, end_segno) + 1); | |
2426 | ||
2427 | init_discard_policy(&dpolicy, DPOLICY_FSTRIM, cpc.trim_minlen); | |
2428 | __issue_discard_cmd_range(sbi, &dpolicy, start_block, end_block); | |
2429 | trimmed = __wait_discard_cmd_range(sbi, &dpolicy, | |
2430 | start_block, end_block); | |
2431 | out: | |
2432 | range->len = F2FS_BLK_TO_BYTES(trimmed); | |
2433 | return err; | |
2434 | } | |
2435 | ||
2436 | static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) | |
2437 | { | |
2438 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2439 | if (curseg->next_blkoff < sbi->blocks_per_seg) | |
2440 | return true; | |
2441 | return false; | |
2442 | } | |
2443 | ||
2444 | int rw_hint_to_seg_type(enum rw_hint hint) | |
2445 | { | |
2446 | switch (hint) { | |
2447 | case WRITE_LIFE_SHORT: | |
2448 | return CURSEG_HOT_DATA; | |
2449 | case WRITE_LIFE_EXTREME: | |
2450 | return CURSEG_COLD_DATA; | |
2451 | default: | |
2452 | return CURSEG_WARM_DATA; | |
2453 | } | |
2454 | } | |
2455 | ||
2456 | static int __get_segment_type_2(struct f2fs_io_info *fio) | |
2457 | { | |
2458 | if (fio->type == DATA) | |
2459 | return CURSEG_HOT_DATA; | |
2460 | else | |
2461 | return CURSEG_HOT_NODE; | |
2462 | } | |
2463 | ||
2464 | static int __get_segment_type_4(struct f2fs_io_info *fio) | |
2465 | { | |
2466 | if (fio->type == DATA) { | |
2467 | struct inode *inode = fio->page->mapping->host; | |
2468 | ||
2469 | if (S_ISDIR(inode->i_mode)) | |
2470 | return CURSEG_HOT_DATA; | |
2471 | else | |
2472 | return CURSEG_COLD_DATA; | |
2473 | } else { | |
2474 | if (IS_DNODE(fio->page) && is_cold_node(fio->page)) | |
2475 | return CURSEG_WARM_NODE; | |
2476 | else | |
2477 | return CURSEG_COLD_NODE; | |
2478 | } | |
2479 | } | |
2480 | ||
2481 | static int __get_segment_type_6(struct f2fs_io_info *fio) | |
2482 | { | |
2483 | if (fio->type == DATA) { | |
2484 | struct inode *inode = fio->page->mapping->host; | |
2485 | ||
2486 | if (is_cold_data(fio->page) || file_is_cold(inode)) | |
2487 | return CURSEG_COLD_DATA; | |
2488 | if (is_inode_flag_set(inode, FI_HOT_DATA)) | |
2489 | return CURSEG_HOT_DATA; | |
2490 | return rw_hint_to_seg_type(inode->i_write_hint); | |
2491 | } else { | |
2492 | if (IS_DNODE(fio->page)) | |
2493 | return is_cold_node(fio->page) ? CURSEG_WARM_NODE : | |
2494 | CURSEG_HOT_NODE; | |
2495 | return CURSEG_COLD_NODE; | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | static int __get_segment_type(struct f2fs_io_info *fio) | |
2500 | { | |
2501 | int type = 0; | |
2502 | ||
2503 | switch (fio->sbi->active_logs) { | |
2504 | case 2: | |
2505 | type = __get_segment_type_2(fio); | |
2506 | break; | |
2507 | case 4: | |
2508 | type = __get_segment_type_4(fio); | |
2509 | break; | |
2510 | case 6: | |
2511 | type = __get_segment_type_6(fio); | |
2512 | break; | |
2513 | default: | |
2514 | f2fs_bug_on(fio->sbi, true); | |
2515 | } | |
2516 | ||
2517 | if (IS_HOT(type)) | |
2518 | fio->temp = HOT; | |
2519 | else if (IS_WARM(type)) | |
2520 | fio->temp = WARM; | |
2521 | else | |
2522 | fio->temp = COLD; | |
2523 | return type; | |
2524 | } | |
2525 | ||
2526 | void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page, | |
2527 | block_t old_blkaddr, block_t *new_blkaddr, | |
2528 | struct f2fs_summary *sum, int type, | |
2529 | struct f2fs_io_info *fio, bool add_list) | |
2530 | { | |
2531 | struct sit_info *sit_i = SIT_I(sbi); | |
2532 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
2533 | ||
2534 | down_read(&SM_I(sbi)->curseg_lock); | |
2535 | ||
2536 | mutex_lock(&curseg->curseg_mutex); | |
2537 | down_write(&sit_i->sentry_lock); | |
2538 | ||
2539 | *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); | |
2540 | ||
2541 | f2fs_wait_discard_bio(sbi, *new_blkaddr); | |
2542 | ||
2543 | /* | |
2544 | * __add_sum_entry should be resided under the curseg_mutex | |
2545 | * because, this function updates a summary entry in the | |
2546 | * current summary block. | |
2547 | */ | |
2548 | __add_sum_entry(sbi, type, sum); | |
2549 | ||
2550 | __refresh_next_blkoff(sbi, curseg); | |
2551 | ||
2552 | stat_inc_block_count(sbi, curseg); | |
2553 | ||
2554 | /* | |
2555 | * SIT information should be updated before segment allocation, | |
2556 | * since SSR needs latest valid block information. | |
2557 | */ | |
2558 | update_sit_entry(sbi, *new_blkaddr, 1); | |
2559 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) | |
2560 | update_sit_entry(sbi, old_blkaddr, -1); | |
2561 | ||
2562 | if (!__has_curseg_space(sbi, type)) | |
2563 | sit_i->s_ops->allocate_segment(sbi, type, false); | |
2564 | ||
2565 | /* | |
2566 | * segment dirty status should be updated after segment allocation, | |
2567 | * so we just need to update status only one time after previous | |
2568 | * segment being closed. | |
2569 | */ | |
2570 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
2571 | locate_dirty_segment(sbi, GET_SEGNO(sbi, *new_blkaddr)); | |
2572 | ||
2573 | up_write(&sit_i->sentry_lock); | |
2574 | ||
2575 | if (page && IS_NODESEG(type)) { | |
2576 | fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); | |
2577 | ||
2578 | f2fs_inode_chksum_set(sbi, page); | |
2579 | } | |
2580 | ||
2581 | if (add_list) { | |
2582 | struct f2fs_bio_info *io; | |
2583 | ||
2584 | INIT_LIST_HEAD(&fio->list); | |
2585 | fio->in_list = true; | |
2586 | io = sbi->write_io[fio->type] + fio->temp; | |
2587 | spin_lock(&io->io_lock); | |
2588 | list_add_tail(&fio->list, &io->io_list); | |
2589 | spin_unlock(&io->io_lock); | |
2590 | } | |
2591 | ||
2592 | mutex_unlock(&curseg->curseg_mutex); | |
2593 | ||
2594 | up_read(&SM_I(sbi)->curseg_lock); | |
2595 | } | |
2596 | ||
2597 | static void update_device_state(struct f2fs_io_info *fio) | |
2598 | { | |
2599 | struct f2fs_sb_info *sbi = fio->sbi; | |
2600 | unsigned int devidx; | |
2601 | ||
2602 | if (!sbi->s_ndevs) | |
2603 | return; | |
2604 | ||
2605 | devidx = f2fs_target_device_index(sbi, fio->new_blkaddr); | |
2606 | ||
2607 | /* update device state for fsync */ | |
2608 | set_dirty_device(sbi, fio->ino, devidx, FLUSH_INO); | |
2609 | ||
2610 | /* update device state for checkpoint */ | |
2611 | if (!f2fs_test_bit(devidx, (char *)&sbi->dirty_device)) { | |
2612 | spin_lock(&sbi->dev_lock); | |
2613 | f2fs_set_bit(devidx, (char *)&sbi->dirty_device); | |
2614 | spin_unlock(&sbi->dev_lock); | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) | |
2619 | { | |
2620 | int type = __get_segment_type(fio); | |
2621 | int err; | |
2622 | ||
2623 | reallocate: | |
2624 | allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr, | |
2625 | &fio->new_blkaddr, sum, type, fio, true); | |
2626 | ||
2627 | /* writeout dirty page into bdev */ | |
2628 | err = f2fs_submit_page_write(fio); | |
2629 | if (err == -EAGAIN) { | |
2630 | fio->old_blkaddr = fio->new_blkaddr; | |
2631 | goto reallocate; | |
2632 | } else if (!err) { | |
2633 | update_device_state(fio); | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | void write_meta_page(struct f2fs_sb_info *sbi, struct page *page, | |
2638 | enum iostat_type io_type) | |
2639 | { | |
2640 | struct f2fs_io_info fio = { | |
2641 | .sbi = sbi, | |
2642 | .type = META, | |
2643 | .op = REQ_OP_WRITE, | |
2644 | .op_flags = REQ_SYNC | REQ_META | REQ_PRIO, | |
2645 | .old_blkaddr = page->index, | |
2646 | .new_blkaddr = page->index, | |
2647 | .page = page, | |
2648 | .encrypted_page = NULL, | |
2649 | .in_list = false, | |
2650 | }; | |
2651 | ||
2652 | if (unlikely(page->index >= MAIN_BLKADDR(sbi))) | |
2653 | fio.op_flags &= ~REQ_META; | |
2654 | ||
2655 | set_page_writeback(page); | |
2656 | f2fs_submit_page_write(&fio); | |
2657 | ||
2658 | f2fs_update_iostat(sbi, io_type, F2FS_BLKSIZE); | |
2659 | } | |
2660 | ||
2661 | void write_node_page(unsigned int nid, struct f2fs_io_info *fio) | |
2662 | { | |
2663 | struct f2fs_summary sum; | |
2664 | ||
2665 | set_summary(&sum, nid, 0, 0); | |
2666 | do_write_page(&sum, fio); | |
2667 | ||
2668 | f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE); | |
2669 | } | |
2670 | ||
2671 | void write_data_page(struct dnode_of_data *dn, struct f2fs_io_info *fio) | |
2672 | { | |
2673 | struct f2fs_sb_info *sbi = fio->sbi; | |
2674 | struct f2fs_summary sum; | |
2675 | struct node_info ni; | |
2676 | ||
2677 | f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR); | |
2678 | get_node_info(sbi, dn->nid, &ni); | |
2679 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
2680 | do_write_page(&sum, fio); | |
2681 | f2fs_update_data_blkaddr(dn, fio->new_blkaddr); | |
2682 | ||
2683 | f2fs_update_iostat(sbi, fio->io_type, F2FS_BLKSIZE); | |
2684 | } | |
2685 | ||
2686 | int rewrite_data_page(struct f2fs_io_info *fio) | |
2687 | { | |
2688 | int err; | |
2689 | ||
2690 | fio->new_blkaddr = fio->old_blkaddr; | |
2691 | stat_inc_inplace_blocks(fio->sbi); | |
2692 | ||
2693 | err = f2fs_submit_page_bio(fio); | |
2694 | if (!err) | |
2695 | update_device_state(fio); | |
2696 | ||
2697 | f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE); | |
2698 | ||
2699 | return err; | |
2700 | } | |
2701 | ||
2702 | static inline int __f2fs_get_curseg(struct f2fs_sb_info *sbi, | |
2703 | unsigned int segno) | |
2704 | { | |
2705 | int i; | |
2706 | ||
2707 | for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) { | |
2708 | if (CURSEG_I(sbi, i)->segno == segno) | |
2709 | break; | |
2710 | } | |
2711 | return i; | |
2712 | } | |
2713 | ||
2714 | void __f2fs_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, | |
2715 | block_t old_blkaddr, block_t new_blkaddr, | |
2716 | bool recover_curseg, bool recover_newaddr) | |
2717 | { | |
2718 | struct sit_info *sit_i = SIT_I(sbi); | |
2719 | struct curseg_info *curseg; | |
2720 | unsigned int segno, old_cursegno; | |
2721 | struct seg_entry *se; | |
2722 | int type; | |
2723 | unsigned short old_blkoff; | |
2724 | ||
2725 | segno = GET_SEGNO(sbi, new_blkaddr); | |
2726 | se = get_seg_entry(sbi, segno); | |
2727 | type = se->type; | |
2728 | ||
2729 | down_write(&SM_I(sbi)->curseg_lock); | |
2730 | ||
2731 | if (!recover_curseg) { | |
2732 | /* for recovery flow */ | |
2733 | if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { | |
2734 | if (old_blkaddr == NULL_ADDR) | |
2735 | type = CURSEG_COLD_DATA; | |
2736 | else | |
2737 | type = CURSEG_WARM_DATA; | |
2738 | } | |
2739 | } else { | |
2740 | if (IS_CURSEG(sbi, segno)) { | |
2741 | /* se->type is volatile as SSR allocation */ | |
2742 | type = __f2fs_get_curseg(sbi, segno); | |
2743 | f2fs_bug_on(sbi, type == NO_CHECK_TYPE); | |
2744 | } else { | |
2745 | type = CURSEG_WARM_DATA; | |
2746 | } | |
2747 | } | |
2748 | ||
2749 | f2fs_bug_on(sbi, !IS_DATASEG(type)); | |
2750 | curseg = CURSEG_I(sbi, type); | |
2751 | ||
2752 | mutex_lock(&curseg->curseg_mutex); | |
2753 | down_write(&sit_i->sentry_lock); | |
2754 | ||
2755 | old_cursegno = curseg->segno; | |
2756 | old_blkoff = curseg->next_blkoff; | |
2757 | ||
2758 | /* change the current segment */ | |
2759 | if (segno != curseg->segno) { | |
2760 | curseg->next_segno = segno; | |
2761 | change_curseg(sbi, type); | |
2762 | } | |
2763 | ||
2764 | curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr); | |
2765 | __add_sum_entry(sbi, type, sum); | |
2766 | ||
2767 | if (!recover_curseg || recover_newaddr) | |
2768 | update_sit_entry(sbi, new_blkaddr, 1); | |
2769 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) | |
2770 | update_sit_entry(sbi, old_blkaddr, -1); | |
2771 | ||
2772 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
2773 | locate_dirty_segment(sbi, GET_SEGNO(sbi, new_blkaddr)); | |
2774 | ||
2775 | locate_dirty_segment(sbi, old_cursegno); | |
2776 | ||
2777 | if (recover_curseg) { | |
2778 | if (old_cursegno != curseg->segno) { | |
2779 | curseg->next_segno = old_cursegno; | |
2780 | change_curseg(sbi, type); | |
2781 | } | |
2782 | curseg->next_blkoff = old_blkoff; | |
2783 | } | |
2784 | ||
2785 | up_write(&sit_i->sentry_lock); | |
2786 | mutex_unlock(&curseg->curseg_mutex); | |
2787 | up_write(&SM_I(sbi)->curseg_lock); | |
2788 | } | |
2789 | ||
2790 | void f2fs_replace_block(struct f2fs_sb_info *sbi, struct dnode_of_data *dn, | |
2791 | block_t old_addr, block_t new_addr, | |
2792 | unsigned char version, bool recover_curseg, | |
2793 | bool recover_newaddr) | |
2794 | { | |
2795 | struct f2fs_summary sum; | |
2796 | ||
2797 | set_summary(&sum, dn->nid, dn->ofs_in_node, version); | |
2798 | ||
2799 | __f2fs_replace_block(sbi, &sum, old_addr, new_addr, | |
2800 | recover_curseg, recover_newaddr); | |
2801 | ||
2802 | f2fs_update_data_blkaddr(dn, new_addr); | |
2803 | } | |
2804 | ||
2805 | void f2fs_wait_on_page_writeback(struct page *page, | |
2806 | enum page_type type, bool ordered) | |
2807 | { | |
2808 | if (PageWriteback(page)) { | |
2809 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); | |
2810 | ||
2811 | f2fs_submit_merged_write_cond(sbi, page->mapping->host, | |
2812 | 0, page->index, type); | |
2813 | if (ordered) | |
2814 | wait_on_page_writeback(page); | |
2815 | else | |
2816 | wait_for_stable_page(page); | |
2817 | } | |
2818 | } | |
2819 | ||
2820 | void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr) | |
2821 | { | |
2822 | struct page *cpage; | |
2823 | ||
2824 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) | |
2825 | return; | |
2826 | ||
2827 | cpage = find_lock_page(META_MAPPING(sbi), blkaddr); | |
2828 | if (cpage) { | |
2829 | f2fs_wait_on_page_writeback(cpage, DATA, true); | |
2830 | f2fs_put_page(cpage, 1); | |
2831 | } | |
2832 | } | |
2833 | ||
2834 | static void read_compacted_summaries(struct f2fs_sb_info *sbi) | |
2835 | { | |
2836 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
2837 | struct curseg_info *seg_i; | |
2838 | unsigned char *kaddr; | |
2839 | struct page *page; | |
2840 | block_t start; | |
2841 | int i, j, offset; | |
2842 | ||
2843 | start = start_sum_block(sbi); | |
2844 | ||
2845 | page = get_meta_page(sbi, start++); | |
2846 | kaddr = (unsigned char *)page_address(page); | |
2847 | ||
2848 | /* Step 1: restore nat cache */ | |
2849 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
2850 | memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE); | |
2851 | ||
2852 | /* Step 2: restore sit cache */ | |
2853 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
2854 | memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE); | |
2855 | offset = 2 * SUM_JOURNAL_SIZE; | |
2856 | ||
2857 | /* Step 3: restore summary entries */ | |
2858 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
2859 | unsigned short blk_off; | |
2860 | unsigned int segno; | |
2861 | ||
2862 | seg_i = CURSEG_I(sbi, i); | |
2863 | segno = le32_to_cpu(ckpt->cur_data_segno[i]); | |
2864 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]); | |
2865 | seg_i->next_segno = segno; | |
2866 | reset_curseg(sbi, i, 0); | |
2867 | seg_i->alloc_type = ckpt->alloc_type[i]; | |
2868 | seg_i->next_blkoff = blk_off; | |
2869 | ||
2870 | if (seg_i->alloc_type == SSR) | |
2871 | blk_off = sbi->blocks_per_seg; | |
2872 | ||
2873 | for (j = 0; j < blk_off; j++) { | |
2874 | struct f2fs_summary *s; | |
2875 | s = (struct f2fs_summary *)(kaddr + offset); | |
2876 | seg_i->sum_blk->entries[j] = *s; | |
2877 | offset += SUMMARY_SIZE; | |
2878 | if (offset + SUMMARY_SIZE <= PAGE_SIZE - | |
2879 | SUM_FOOTER_SIZE) | |
2880 | continue; | |
2881 | ||
2882 | f2fs_put_page(page, 1); | |
2883 | page = NULL; | |
2884 | ||
2885 | page = get_meta_page(sbi, start++); | |
2886 | kaddr = (unsigned char *)page_address(page); | |
2887 | offset = 0; | |
2888 | } | |
2889 | } | |
2890 | f2fs_put_page(page, 1); | |
2891 | } | |
2892 | ||
2893 | static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) | |
2894 | { | |
2895 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
2896 | struct f2fs_summary_block *sum; | |
2897 | struct curseg_info *curseg; | |
2898 | struct page *new; | |
2899 | unsigned short blk_off; | |
2900 | unsigned int segno = 0; | |
2901 | block_t blk_addr = 0; | |
2902 | ||
2903 | /* get segment number and block addr */ | |
2904 | if (IS_DATASEG(type)) { | |
2905 | segno = le32_to_cpu(ckpt->cur_data_segno[type]); | |
2906 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - | |
2907 | CURSEG_HOT_DATA]); | |
2908 | if (__exist_node_summaries(sbi)) | |
2909 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); | |
2910 | else | |
2911 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); | |
2912 | } else { | |
2913 | segno = le32_to_cpu(ckpt->cur_node_segno[type - | |
2914 | CURSEG_HOT_NODE]); | |
2915 | blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - | |
2916 | CURSEG_HOT_NODE]); | |
2917 | if (__exist_node_summaries(sbi)) | |
2918 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, | |
2919 | type - CURSEG_HOT_NODE); | |
2920 | else | |
2921 | blk_addr = GET_SUM_BLOCK(sbi, segno); | |
2922 | } | |
2923 | ||
2924 | new = get_meta_page(sbi, blk_addr); | |
2925 | sum = (struct f2fs_summary_block *)page_address(new); | |
2926 | ||
2927 | if (IS_NODESEG(type)) { | |
2928 | if (__exist_node_summaries(sbi)) { | |
2929 | struct f2fs_summary *ns = &sum->entries[0]; | |
2930 | int i; | |
2931 | for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { | |
2932 | ns->version = 0; | |
2933 | ns->ofs_in_node = 0; | |
2934 | } | |
2935 | } else { | |
2936 | restore_node_summary(sbi, segno, sum); | |
2937 | } | |
2938 | } | |
2939 | ||
2940 | /* set uncompleted segment to curseg */ | |
2941 | curseg = CURSEG_I(sbi, type); | |
2942 | mutex_lock(&curseg->curseg_mutex); | |
2943 | ||
2944 | /* update journal info */ | |
2945 | down_write(&curseg->journal_rwsem); | |
2946 | memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE); | |
2947 | up_write(&curseg->journal_rwsem); | |
2948 | ||
2949 | memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE); | |
2950 | memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE); | |
2951 | curseg->next_segno = segno; | |
2952 | reset_curseg(sbi, type, 0); | |
2953 | curseg->alloc_type = ckpt->alloc_type[type]; | |
2954 | curseg->next_blkoff = blk_off; | |
2955 | mutex_unlock(&curseg->curseg_mutex); | |
2956 | f2fs_put_page(new, 1); | |
2957 | return 0; | |
2958 | } | |
2959 | ||
2960 | static int restore_curseg_summaries(struct f2fs_sb_info *sbi) | |
2961 | { | |
2962 | struct f2fs_journal *sit_j = CURSEG_I(sbi, CURSEG_COLD_DATA)->journal; | |
2963 | struct f2fs_journal *nat_j = CURSEG_I(sbi, CURSEG_HOT_DATA)->journal; | |
2964 | int type = CURSEG_HOT_DATA; | |
2965 | int err; | |
2966 | ||
2967 | if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) { | |
2968 | int npages = npages_for_summary_flush(sbi, true); | |
2969 | ||
2970 | if (npages >= 2) | |
2971 | ra_meta_pages(sbi, start_sum_block(sbi), npages, | |
2972 | META_CP, true); | |
2973 | ||
2974 | /* restore for compacted data summary */ | |
2975 | read_compacted_summaries(sbi); | |
2976 | type = CURSEG_HOT_NODE; | |
2977 | } | |
2978 | ||
2979 | if (__exist_node_summaries(sbi)) | |
2980 | ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type), | |
2981 | NR_CURSEG_TYPE - type, META_CP, true); | |
2982 | ||
2983 | for (; type <= CURSEG_COLD_NODE; type++) { | |
2984 | err = read_normal_summaries(sbi, type); | |
2985 | if (err) | |
2986 | return err; | |
2987 | } | |
2988 | ||
2989 | /* sanity check for summary blocks */ | |
2990 | if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES || | |
2991 | sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) | |
2992 | return -EINVAL; | |
2993 | ||
2994 | return 0; | |
2995 | } | |
2996 | ||
2997 | static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) | |
2998 | { | |
2999 | struct page *page; | |
3000 | unsigned char *kaddr; | |
3001 | struct f2fs_summary *summary; | |
3002 | struct curseg_info *seg_i; | |
3003 | int written_size = 0; | |
3004 | int i, j; | |
3005 | ||
3006 | page = grab_meta_page(sbi, blkaddr++); | |
3007 | kaddr = (unsigned char *)page_address(page); | |
3008 | ||
3009 | /* Step 1: write nat cache */ | |
3010 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
3011 | memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE); | |
3012 | written_size += SUM_JOURNAL_SIZE; | |
3013 | ||
3014 | /* Step 2: write sit cache */ | |
3015 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
3016 | memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE); | |
3017 | written_size += SUM_JOURNAL_SIZE; | |
3018 | ||
3019 | /* Step 3: write summary entries */ | |
3020 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
3021 | unsigned short blkoff; | |
3022 | seg_i = CURSEG_I(sbi, i); | |
3023 | if (sbi->ckpt->alloc_type[i] == SSR) | |
3024 | blkoff = sbi->blocks_per_seg; | |
3025 | else | |
3026 | blkoff = curseg_blkoff(sbi, i); | |
3027 | ||
3028 | for (j = 0; j < blkoff; j++) { | |
3029 | if (!page) { | |
3030 | page = grab_meta_page(sbi, blkaddr++); | |
3031 | kaddr = (unsigned char *)page_address(page); | |
3032 | written_size = 0; | |
3033 | } | |
3034 | summary = (struct f2fs_summary *)(kaddr + written_size); | |
3035 | *summary = seg_i->sum_blk->entries[j]; | |
3036 | written_size += SUMMARY_SIZE; | |
3037 | ||
3038 | if (written_size + SUMMARY_SIZE <= PAGE_SIZE - | |
3039 | SUM_FOOTER_SIZE) | |
3040 | continue; | |
3041 | ||
3042 | set_page_dirty(page); | |
3043 | f2fs_put_page(page, 1); | |
3044 | page = NULL; | |
3045 | } | |
3046 | } | |
3047 | if (page) { | |
3048 | set_page_dirty(page); | |
3049 | f2fs_put_page(page, 1); | |
3050 | } | |
3051 | } | |
3052 | ||
3053 | static void write_normal_summaries(struct f2fs_sb_info *sbi, | |
3054 | block_t blkaddr, int type) | |
3055 | { | |
3056 | int i, end; | |
3057 | if (IS_DATASEG(type)) | |
3058 | end = type + NR_CURSEG_DATA_TYPE; | |
3059 | else | |
3060 | end = type + NR_CURSEG_NODE_TYPE; | |
3061 | ||
3062 | for (i = type; i < end; i++) | |
3063 | write_current_sum_page(sbi, i, blkaddr + (i - type)); | |
3064 | } | |
3065 | ||
3066 | void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
3067 | { | |
3068 | if (is_set_ckpt_flags(sbi, CP_COMPACT_SUM_FLAG)) | |
3069 | write_compacted_summaries(sbi, start_blk); | |
3070 | else | |
3071 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); | |
3072 | } | |
3073 | ||
3074 | void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
3075 | { | |
3076 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); | |
3077 | } | |
3078 | ||
3079 | int lookup_journal_in_cursum(struct f2fs_journal *journal, int type, | |
3080 | unsigned int val, int alloc) | |
3081 | { | |
3082 | int i; | |
3083 | ||
3084 | if (type == NAT_JOURNAL) { | |
3085 | for (i = 0; i < nats_in_cursum(journal); i++) { | |
3086 | if (le32_to_cpu(nid_in_journal(journal, i)) == val) | |
3087 | return i; | |
3088 | } | |
3089 | if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL)) | |
3090 | return update_nats_in_cursum(journal, 1); | |
3091 | } else if (type == SIT_JOURNAL) { | |
3092 | for (i = 0; i < sits_in_cursum(journal); i++) | |
3093 | if (le32_to_cpu(segno_in_journal(journal, i)) == val) | |
3094 | return i; | |
3095 | if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL)) | |
3096 | return update_sits_in_cursum(journal, 1); | |
3097 | } | |
3098 | return -1; | |
3099 | } | |
3100 | ||
3101 | static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, | |
3102 | unsigned int segno) | |
3103 | { | |
3104 | return get_meta_page(sbi, current_sit_addr(sbi, segno)); | |
3105 | } | |
3106 | ||
3107 | static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, | |
3108 | unsigned int start) | |
3109 | { | |
3110 | struct sit_info *sit_i = SIT_I(sbi); | |
3111 | struct page *src_page, *dst_page; | |
3112 | pgoff_t src_off, dst_off; | |
3113 | void *src_addr, *dst_addr; | |
3114 | ||
3115 | src_off = current_sit_addr(sbi, start); | |
3116 | dst_off = next_sit_addr(sbi, src_off); | |
3117 | ||
3118 | /* get current sit block page without lock */ | |
3119 | src_page = get_meta_page(sbi, src_off); | |
3120 | dst_page = grab_meta_page(sbi, dst_off); | |
3121 | f2fs_bug_on(sbi, PageDirty(src_page)); | |
3122 | ||
3123 | src_addr = page_address(src_page); | |
3124 | dst_addr = page_address(dst_page); | |
3125 | memcpy(dst_addr, src_addr, PAGE_SIZE); | |
3126 | ||
3127 | set_page_dirty(dst_page); | |
3128 | f2fs_put_page(src_page, 1); | |
3129 | ||
3130 | set_to_next_sit(sit_i, start); | |
3131 | ||
3132 | return dst_page; | |
3133 | } | |
3134 | ||
3135 | static struct sit_entry_set *grab_sit_entry_set(void) | |
3136 | { | |
3137 | struct sit_entry_set *ses = | |
3138 | f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_NOFS); | |
3139 | ||
3140 | ses->entry_cnt = 0; | |
3141 | INIT_LIST_HEAD(&ses->set_list); | |
3142 | return ses; | |
3143 | } | |
3144 | ||
3145 | static void release_sit_entry_set(struct sit_entry_set *ses) | |
3146 | { | |
3147 | list_del(&ses->set_list); | |
3148 | kmem_cache_free(sit_entry_set_slab, ses); | |
3149 | } | |
3150 | ||
3151 | static void adjust_sit_entry_set(struct sit_entry_set *ses, | |
3152 | struct list_head *head) | |
3153 | { | |
3154 | struct sit_entry_set *next = ses; | |
3155 | ||
3156 | if (list_is_last(&ses->set_list, head)) | |
3157 | return; | |
3158 | ||
3159 | list_for_each_entry_continue(next, head, set_list) | |
3160 | if (ses->entry_cnt <= next->entry_cnt) | |
3161 | break; | |
3162 | ||
3163 | list_move_tail(&ses->set_list, &next->set_list); | |
3164 | } | |
3165 | ||
3166 | static void add_sit_entry(unsigned int segno, struct list_head *head) | |
3167 | { | |
3168 | struct sit_entry_set *ses; | |
3169 | unsigned int start_segno = START_SEGNO(segno); | |
3170 | ||
3171 | list_for_each_entry(ses, head, set_list) { | |
3172 | if (ses->start_segno == start_segno) { | |
3173 | ses->entry_cnt++; | |
3174 | adjust_sit_entry_set(ses, head); | |
3175 | return; | |
3176 | } | |
3177 | } | |
3178 | ||
3179 | ses = grab_sit_entry_set(); | |
3180 | ||
3181 | ses->start_segno = start_segno; | |
3182 | ses->entry_cnt++; | |
3183 | list_add(&ses->set_list, head); | |
3184 | } | |
3185 | ||
3186 | static void add_sits_in_set(struct f2fs_sb_info *sbi) | |
3187 | { | |
3188 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
3189 | struct list_head *set_list = &sm_info->sit_entry_set; | |
3190 | unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap; | |
3191 | unsigned int segno; | |
3192 | ||
3193 | for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi)) | |
3194 | add_sit_entry(segno, set_list); | |
3195 | } | |
3196 | ||
3197 | static void remove_sits_in_journal(struct f2fs_sb_info *sbi) | |
3198 | { | |
3199 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
3200 | struct f2fs_journal *journal = curseg->journal; | |
3201 | int i; | |
3202 | ||
3203 | down_write(&curseg->journal_rwsem); | |
3204 | for (i = 0; i < sits_in_cursum(journal); i++) { | |
3205 | unsigned int segno; | |
3206 | bool dirtied; | |
3207 | ||
3208 | segno = le32_to_cpu(segno_in_journal(journal, i)); | |
3209 | dirtied = __mark_sit_entry_dirty(sbi, segno); | |
3210 | ||
3211 | if (!dirtied) | |
3212 | add_sit_entry(segno, &SM_I(sbi)->sit_entry_set); | |
3213 | } | |
3214 | update_sits_in_cursum(journal, -i); | |
3215 | up_write(&curseg->journal_rwsem); | |
3216 | } | |
3217 | ||
3218 | /* | |
3219 | * CP calls this function, which flushes SIT entries including sit_journal, | |
3220 | * and moves prefree segs to free segs. | |
3221 | */ | |
3222 | void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc) | |
3223 | { | |
3224 | struct sit_info *sit_i = SIT_I(sbi); | |
3225 | unsigned long *bitmap = sit_i->dirty_sentries_bitmap; | |
3226 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
3227 | struct f2fs_journal *journal = curseg->journal; | |
3228 | struct sit_entry_set *ses, *tmp; | |
3229 | struct list_head *head = &SM_I(sbi)->sit_entry_set; | |
3230 | bool to_journal = true; | |
3231 | struct seg_entry *se; | |
3232 | ||
3233 | down_write(&sit_i->sentry_lock); | |
3234 | ||
3235 | if (!sit_i->dirty_sentries) | |
3236 | goto out; | |
3237 | ||
3238 | /* | |
3239 | * add and account sit entries of dirty bitmap in sit entry | |
3240 | * set temporarily | |
3241 | */ | |
3242 | add_sits_in_set(sbi); | |
3243 | ||
3244 | /* | |
3245 | * if there are no enough space in journal to store dirty sit | |
3246 | * entries, remove all entries from journal and add and account | |
3247 | * them in sit entry set. | |
3248 | */ | |
3249 | if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL)) | |
3250 | remove_sits_in_journal(sbi); | |
3251 | ||
3252 | /* | |
3253 | * there are two steps to flush sit entries: | |
3254 | * #1, flush sit entries to journal in current cold data summary block. | |
3255 | * #2, flush sit entries to sit page. | |
3256 | */ | |
3257 | list_for_each_entry_safe(ses, tmp, head, set_list) { | |
3258 | struct page *page = NULL; | |
3259 | struct f2fs_sit_block *raw_sit = NULL; | |
3260 | unsigned int start_segno = ses->start_segno; | |
3261 | unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK, | |
3262 | (unsigned long)MAIN_SEGS(sbi)); | |
3263 | unsigned int segno = start_segno; | |
3264 | ||
3265 | if (to_journal && | |
3266 | !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL)) | |
3267 | to_journal = false; | |
3268 | ||
3269 | if (to_journal) { | |
3270 | down_write(&curseg->journal_rwsem); | |
3271 | } else { | |
3272 | page = get_next_sit_page(sbi, start_segno); | |
3273 | raw_sit = page_address(page); | |
3274 | } | |
3275 | ||
3276 | /* flush dirty sit entries in region of current sit set */ | |
3277 | for_each_set_bit_from(segno, bitmap, end) { | |
3278 | int offset, sit_offset; | |
3279 | ||
3280 | se = get_seg_entry(sbi, segno); | |
3281 | ||
3282 | /* add discard candidates */ | |
3283 | if (!(cpc->reason & CP_DISCARD)) { | |
3284 | cpc->trim_start = segno; | |
3285 | add_discard_addrs(sbi, cpc, false); | |
3286 | } | |
3287 | ||
3288 | if (to_journal) { | |
3289 | offset = lookup_journal_in_cursum(journal, | |
3290 | SIT_JOURNAL, segno, 1); | |
3291 | f2fs_bug_on(sbi, offset < 0); | |
3292 | segno_in_journal(journal, offset) = | |
3293 | cpu_to_le32(segno); | |
3294 | seg_info_to_raw_sit(se, | |
3295 | &sit_in_journal(journal, offset)); | |
3296 | } else { | |
3297 | sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); | |
3298 | seg_info_to_raw_sit(se, | |
3299 | &raw_sit->entries[sit_offset]); | |
3300 | } | |
3301 | ||
3302 | __clear_bit(segno, bitmap); | |
3303 | sit_i->dirty_sentries--; | |
3304 | ses->entry_cnt--; | |
3305 | } | |
3306 | ||
3307 | if (to_journal) | |
3308 | up_write(&curseg->journal_rwsem); | |
3309 | else | |
3310 | f2fs_put_page(page, 1); | |
3311 | ||
3312 | f2fs_bug_on(sbi, ses->entry_cnt); | |
3313 | release_sit_entry_set(ses); | |
3314 | } | |
3315 | ||
3316 | f2fs_bug_on(sbi, !list_empty(head)); | |
3317 | f2fs_bug_on(sbi, sit_i->dirty_sentries); | |
3318 | out: | |
3319 | if (cpc->reason & CP_DISCARD) { | |
3320 | __u64 trim_start = cpc->trim_start; | |
3321 | ||
3322 | for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) | |
3323 | add_discard_addrs(sbi, cpc, false); | |
3324 | ||
3325 | cpc->trim_start = trim_start; | |
3326 | } | |
3327 | up_write(&sit_i->sentry_lock); | |
3328 | ||
3329 | set_prefree_as_free_segments(sbi); | |
3330 | } | |
3331 | ||
3332 | static int build_sit_info(struct f2fs_sb_info *sbi) | |
3333 | { | |
3334 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
3335 | struct sit_info *sit_i; | |
3336 | unsigned int sit_segs, start; | |
3337 | char *src_bitmap; | |
3338 | unsigned int bitmap_size; | |
3339 | ||
3340 | /* allocate memory for SIT information */ | |
3341 | sit_i = f2fs_kzalloc(sbi, sizeof(struct sit_info), GFP_KERNEL); | |
3342 | if (!sit_i) | |
3343 | return -ENOMEM; | |
3344 | ||
3345 | SM_I(sbi)->sit_info = sit_i; | |
3346 | ||
3347 | sit_i->sentries = f2fs_kvzalloc(sbi, MAIN_SEGS(sbi) * | |
3348 | sizeof(struct seg_entry), GFP_KERNEL); | |
3349 | if (!sit_i->sentries) | |
3350 | return -ENOMEM; | |
3351 | ||
3352 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); | |
3353 | sit_i->dirty_sentries_bitmap = f2fs_kvzalloc(sbi, bitmap_size, | |
3354 | GFP_KERNEL); | |
3355 | if (!sit_i->dirty_sentries_bitmap) | |
3356 | return -ENOMEM; | |
3357 | ||
3358 | for (start = 0; start < MAIN_SEGS(sbi); start++) { | |
3359 | sit_i->sentries[start].cur_valid_map | |
3360 | = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
3361 | sit_i->sentries[start].ckpt_valid_map | |
3362 | = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
3363 | if (!sit_i->sentries[start].cur_valid_map || | |
3364 | !sit_i->sentries[start].ckpt_valid_map) | |
3365 | return -ENOMEM; | |
3366 | ||
3367 | #ifdef CONFIG_F2FS_CHECK_FS | |
3368 | sit_i->sentries[start].cur_valid_map_mir | |
3369 | = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
3370 | if (!sit_i->sentries[start].cur_valid_map_mir) | |
3371 | return -ENOMEM; | |
3372 | #endif | |
3373 | ||
3374 | if (f2fs_discard_en(sbi)) { | |
3375 | sit_i->sentries[start].discard_map | |
3376 | = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, | |
3377 | GFP_KERNEL); | |
3378 | if (!sit_i->sentries[start].discard_map) | |
3379 | return -ENOMEM; | |
3380 | } | |
3381 | } | |
3382 | ||
3383 | sit_i->tmp_map = f2fs_kzalloc(sbi, SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
3384 | if (!sit_i->tmp_map) | |
3385 | return -ENOMEM; | |
3386 | ||
3387 | if (sbi->segs_per_sec > 1) { | |
3388 | sit_i->sec_entries = f2fs_kvzalloc(sbi, MAIN_SECS(sbi) * | |
3389 | sizeof(struct sec_entry), GFP_KERNEL); | |
3390 | if (!sit_i->sec_entries) | |
3391 | return -ENOMEM; | |
3392 | } | |
3393 | ||
3394 | /* get information related with SIT */ | |
3395 | sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; | |
3396 | ||
3397 | /* setup SIT bitmap from ckeckpoint pack */ | |
3398 | bitmap_size = __bitmap_size(sbi, SIT_BITMAP); | |
3399 | src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); | |
3400 | ||
3401 | sit_i->sit_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); | |
3402 | if (!sit_i->sit_bitmap) | |
3403 | return -ENOMEM; | |
3404 | ||
3405 | #ifdef CONFIG_F2FS_CHECK_FS | |
3406 | sit_i->sit_bitmap_mir = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); | |
3407 | if (!sit_i->sit_bitmap_mir) | |
3408 | return -ENOMEM; | |
3409 | #endif | |
3410 | ||
3411 | /* init SIT information */ | |
3412 | sit_i->s_ops = &default_salloc_ops; | |
3413 | ||
3414 | sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); | |
3415 | sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; | |
3416 | sit_i->written_valid_blocks = 0; | |
3417 | sit_i->bitmap_size = bitmap_size; | |
3418 | sit_i->dirty_sentries = 0; | |
3419 | sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; | |
3420 | sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); | |
3421 | sit_i->mounted_time = ktime_get_real_seconds(); | |
3422 | init_rwsem(&sit_i->sentry_lock); | |
3423 | return 0; | |
3424 | } | |
3425 | ||
3426 | static int build_free_segmap(struct f2fs_sb_info *sbi) | |
3427 | { | |
3428 | struct free_segmap_info *free_i; | |
3429 | unsigned int bitmap_size, sec_bitmap_size; | |
3430 | ||
3431 | /* allocate memory for free segmap information */ | |
3432 | free_i = f2fs_kzalloc(sbi, sizeof(struct free_segmap_info), GFP_KERNEL); | |
3433 | if (!free_i) | |
3434 | return -ENOMEM; | |
3435 | ||
3436 | SM_I(sbi)->free_info = free_i; | |
3437 | ||
3438 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); | |
3439 | free_i->free_segmap = f2fs_kvmalloc(sbi, bitmap_size, GFP_KERNEL); | |
3440 | if (!free_i->free_segmap) | |
3441 | return -ENOMEM; | |
3442 | ||
3443 | sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); | |
3444 | free_i->free_secmap = f2fs_kvmalloc(sbi, sec_bitmap_size, GFP_KERNEL); | |
3445 | if (!free_i->free_secmap) | |
3446 | return -ENOMEM; | |
3447 | ||
3448 | /* set all segments as dirty temporarily */ | |
3449 | memset(free_i->free_segmap, 0xff, bitmap_size); | |
3450 | memset(free_i->free_secmap, 0xff, sec_bitmap_size); | |
3451 | ||
3452 | /* init free segmap information */ | |
3453 | free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi)); | |
3454 | free_i->free_segments = 0; | |
3455 | free_i->free_sections = 0; | |
3456 | spin_lock_init(&free_i->segmap_lock); | |
3457 | return 0; | |
3458 | } | |
3459 | ||
3460 | static int build_curseg(struct f2fs_sb_info *sbi) | |
3461 | { | |
3462 | struct curseg_info *array; | |
3463 | int i; | |
3464 | ||
3465 | array = f2fs_kzalloc(sbi, sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL); | |
3466 | if (!array) | |
3467 | return -ENOMEM; | |
3468 | ||
3469 | SM_I(sbi)->curseg_array = array; | |
3470 | ||
3471 | for (i = 0; i < NR_CURSEG_TYPE; i++) { | |
3472 | mutex_init(&array[i].curseg_mutex); | |
3473 | array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL); | |
3474 | if (!array[i].sum_blk) | |
3475 | return -ENOMEM; | |
3476 | init_rwsem(&array[i].journal_rwsem); | |
3477 | array[i].journal = f2fs_kzalloc(sbi, | |
3478 | sizeof(struct f2fs_journal), GFP_KERNEL); | |
3479 | if (!array[i].journal) | |
3480 | return -ENOMEM; | |
3481 | array[i].segno = NULL_SEGNO; | |
3482 | array[i].next_blkoff = 0; | |
3483 | } | |
3484 | return restore_curseg_summaries(sbi); | |
3485 | } | |
3486 | ||
3487 | static int build_sit_entries(struct f2fs_sb_info *sbi) | |
3488 | { | |
3489 | struct sit_info *sit_i = SIT_I(sbi); | |
3490 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
3491 | struct f2fs_journal *journal = curseg->journal; | |
3492 | struct seg_entry *se; | |
3493 | struct f2fs_sit_entry sit; | |
3494 | int sit_blk_cnt = SIT_BLK_CNT(sbi); | |
3495 | unsigned int i, start, end; | |
3496 | unsigned int readed, start_blk = 0; | |
3497 | int err = 0; | |
3498 | ||
3499 | do { | |
3500 | readed = ra_meta_pages(sbi, start_blk, BIO_MAX_PAGES, | |
3501 | META_SIT, true); | |
3502 | ||
3503 | start = start_blk * sit_i->sents_per_block; | |
3504 | end = (start_blk + readed) * sit_i->sents_per_block; | |
3505 | ||
3506 | for (; start < end && start < MAIN_SEGS(sbi); start++) { | |
3507 | struct f2fs_sit_block *sit_blk; | |
3508 | struct page *page; | |
3509 | ||
3510 | se = &sit_i->sentries[start]; | |
3511 | page = get_current_sit_page(sbi, start); | |
3512 | sit_blk = (struct f2fs_sit_block *)page_address(page); | |
3513 | sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; | |
3514 | f2fs_put_page(page, 1); | |
3515 | ||
3516 | err = check_block_count(sbi, start, &sit); | |
3517 | if (err) | |
3518 | return err; | |
3519 | seg_info_from_raw_sit(se, &sit); | |
3520 | ||
3521 | /* build discard map only one time */ | |
3522 | if (f2fs_discard_en(sbi)) { | |
3523 | if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { | |
3524 | memset(se->discard_map, 0xff, | |
3525 | SIT_VBLOCK_MAP_SIZE); | |
3526 | } else { | |
3527 | memcpy(se->discard_map, | |
3528 | se->cur_valid_map, | |
3529 | SIT_VBLOCK_MAP_SIZE); | |
3530 | sbi->discard_blks += | |
3531 | sbi->blocks_per_seg - | |
3532 | se->valid_blocks; | |
3533 | } | |
3534 | } | |
3535 | ||
3536 | if (sbi->segs_per_sec > 1) | |
3537 | get_sec_entry(sbi, start)->valid_blocks += | |
3538 | se->valid_blocks; | |
3539 | } | |
3540 | start_blk += readed; | |
3541 | } while (start_blk < sit_blk_cnt); | |
3542 | ||
3543 | down_read(&curseg->journal_rwsem); | |
3544 | for (i = 0; i < sits_in_cursum(journal); i++) { | |
3545 | unsigned int old_valid_blocks; | |
3546 | ||
3547 | start = le32_to_cpu(segno_in_journal(journal, i)); | |
3548 | se = &sit_i->sentries[start]; | |
3549 | sit = sit_in_journal(journal, i); | |
3550 | ||
3551 | old_valid_blocks = se->valid_blocks; | |
3552 | ||
3553 | err = check_block_count(sbi, start, &sit); | |
3554 | if (err) | |
3555 | break; | |
3556 | seg_info_from_raw_sit(se, &sit); | |
3557 | ||
3558 | if (f2fs_discard_en(sbi)) { | |
3559 | if (is_set_ckpt_flags(sbi, CP_TRIMMED_FLAG)) { | |
3560 | memset(se->discard_map, 0xff, | |
3561 | SIT_VBLOCK_MAP_SIZE); | |
3562 | } else { | |
3563 | memcpy(se->discard_map, se->cur_valid_map, | |
3564 | SIT_VBLOCK_MAP_SIZE); | |
3565 | sbi->discard_blks += old_valid_blocks - | |
3566 | se->valid_blocks; | |
3567 | } | |
3568 | } | |
3569 | ||
3570 | if (sbi->segs_per_sec > 1) | |
3571 | get_sec_entry(sbi, start)->valid_blocks += | |
3572 | se->valid_blocks - old_valid_blocks; | |
3573 | } | |
3574 | up_read(&curseg->journal_rwsem); | |
3575 | return err; | |
3576 | } | |
3577 | ||
3578 | static void init_free_segmap(struct f2fs_sb_info *sbi) | |
3579 | { | |
3580 | unsigned int start; | |
3581 | int type; | |
3582 | ||
3583 | for (start = 0; start < MAIN_SEGS(sbi); start++) { | |
3584 | struct seg_entry *sentry = get_seg_entry(sbi, start); | |
3585 | if (!sentry->valid_blocks) | |
3586 | __set_free(sbi, start); | |
3587 | else | |
3588 | SIT_I(sbi)->written_valid_blocks += | |
3589 | sentry->valid_blocks; | |
3590 | } | |
3591 | ||
3592 | /* set use the current segments */ | |
3593 | for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { | |
3594 | struct curseg_info *curseg_t = CURSEG_I(sbi, type); | |
3595 | __set_test_and_inuse(sbi, curseg_t->segno); | |
3596 | } | |
3597 | } | |
3598 | ||
3599 | static void init_dirty_segmap(struct f2fs_sb_info *sbi) | |
3600 | { | |
3601 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
3602 | struct free_segmap_info *free_i = FREE_I(sbi); | |
3603 | unsigned int segno = 0, offset = 0; | |
3604 | unsigned short valid_blocks; | |
3605 | ||
3606 | while (1) { | |
3607 | /* find dirty segment based on free segmap */ | |
3608 | segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset); | |
3609 | if (segno >= MAIN_SEGS(sbi)) | |
3610 | break; | |
3611 | offset = segno + 1; | |
3612 | valid_blocks = get_valid_blocks(sbi, segno, false); | |
3613 | if (valid_blocks == sbi->blocks_per_seg || !valid_blocks) | |
3614 | continue; | |
3615 | if (valid_blocks > sbi->blocks_per_seg) { | |
3616 | f2fs_bug_on(sbi, 1); | |
3617 | continue; | |
3618 | } | |
3619 | mutex_lock(&dirty_i->seglist_lock); | |
3620 | __locate_dirty_segment(sbi, segno, DIRTY); | |
3621 | mutex_unlock(&dirty_i->seglist_lock); | |
3622 | } | |
3623 | } | |
3624 | ||
3625 | static int init_victim_secmap(struct f2fs_sb_info *sbi) | |
3626 | { | |
3627 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
3628 | unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); | |
3629 | ||
3630 | dirty_i->victim_secmap = f2fs_kvzalloc(sbi, bitmap_size, GFP_KERNEL); | |
3631 | if (!dirty_i->victim_secmap) | |
3632 | return -ENOMEM; | |
3633 | return 0; | |
3634 | } | |
3635 | ||
3636 | static int build_dirty_segmap(struct f2fs_sb_info *sbi) | |
3637 | { | |
3638 | struct dirty_seglist_info *dirty_i; | |
3639 | unsigned int bitmap_size, i; | |
3640 | ||
3641 | /* allocate memory for dirty segments list information */ | |
3642 | dirty_i = f2fs_kzalloc(sbi, sizeof(struct dirty_seglist_info), | |
3643 | GFP_KERNEL); | |
3644 | if (!dirty_i) | |
3645 | return -ENOMEM; | |
3646 | ||
3647 | SM_I(sbi)->dirty_info = dirty_i; | |
3648 | mutex_init(&dirty_i->seglist_lock); | |
3649 | ||
3650 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); | |
3651 | ||
3652 | for (i = 0; i < NR_DIRTY_TYPE; i++) { | |
3653 | dirty_i->dirty_segmap[i] = f2fs_kvzalloc(sbi, bitmap_size, | |
3654 | GFP_KERNEL); | |
3655 | if (!dirty_i->dirty_segmap[i]) | |
3656 | return -ENOMEM; | |
3657 | } | |
3658 | ||
3659 | init_dirty_segmap(sbi); | |
3660 | return init_victim_secmap(sbi); | |
3661 | } | |
3662 | ||
3663 | /* | |
3664 | * Update min, max modified time for cost-benefit GC algorithm | |
3665 | */ | |
3666 | static void init_min_max_mtime(struct f2fs_sb_info *sbi) | |
3667 | { | |
3668 | struct sit_info *sit_i = SIT_I(sbi); | |
3669 | unsigned int segno; | |
3670 | ||
3671 | down_write(&sit_i->sentry_lock); | |
3672 | ||
3673 | sit_i->min_mtime = LLONG_MAX; | |
3674 | ||
3675 | for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { | |
3676 | unsigned int i; | |
3677 | unsigned long long mtime = 0; | |
3678 | ||
3679 | for (i = 0; i < sbi->segs_per_sec; i++) | |
3680 | mtime += get_seg_entry(sbi, segno + i)->mtime; | |
3681 | ||
3682 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
3683 | ||
3684 | if (sit_i->min_mtime > mtime) | |
3685 | sit_i->min_mtime = mtime; | |
3686 | } | |
3687 | sit_i->max_mtime = get_mtime(sbi); | |
3688 | up_write(&sit_i->sentry_lock); | |
3689 | } | |
3690 | ||
3691 | int build_segment_manager(struct f2fs_sb_info *sbi) | |
3692 | { | |
3693 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
3694 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
3695 | struct f2fs_sm_info *sm_info; | |
3696 | int err; | |
3697 | ||
3698 | sm_info = f2fs_kzalloc(sbi, sizeof(struct f2fs_sm_info), GFP_KERNEL); | |
3699 | if (!sm_info) | |
3700 | return -ENOMEM; | |
3701 | ||
3702 | /* init sm info */ | |
3703 | sbi->sm_info = sm_info; | |
3704 | sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); | |
3705 | sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
3706 | sm_info->segment_count = le32_to_cpu(raw_super->segment_count); | |
3707 | sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); | |
3708 | sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); | |
3709 | sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); | |
3710 | sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
3711 | sm_info->rec_prefree_segments = sm_info->main_segments * | |
3712 | DEF_RECLAIM_PREFREE_SEGMENTS / 100; | |
3713 | if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS) | |
3714 | sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS; | |
3715 | ||
3716 | if (!test_opt(sbi, LFS)) | |
3717 | sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC; | |
3718 | sm_info->min_ipu_util = DEF_MIN_IPU_UTIL; | |
3719 | sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS; | |
3720 | sm_info->min_hot_blocks = DEF_MIN_HOT_BLOCKS; | |
3721 | sm_info->min_ssr_sections = reserved_sections(sbi); | |
3722 | ||
3723 | sm_info->trim_sections = DEF_BATCHED_TRIM_SECTIONS; | |
3724 | ||
3725 | INIT_LIST_HEAD(&sm_info->sit_entry_set); | |
3726 | ||
3727 | init_rwsem(&sm_info->curseg_lock); | |
3728 | ||
3729 | if (!f2fs_readonly(sbi->sb)) { | |
3730 | err = create_flush_cmd_control(sbi); | |
3731 | if (err) | |
3732 | return err; | |
3733 | } | |
3734 | ||
3735 | err = create_discard_cmd_control(sbi); | |
3736 | if (err) | |
3737 | return err; | |
3738 | ||
3739 | err = build_sit_info(sbi); | |
3740 | if (err) | |
3741 | return err; | |
3742 | err = build_free_segmap(sbi); | |
3743 | if (err) | |
3744 | return err; | |
3745 | err = build_curseg(sbi); | |
3746 | if (err) | |
3747 | return err; | |
3748 | ||
3749 | /* reinit free segmap based on SIT */ | |
3750 | err = build_sit_entries(sbi); | |
3751 | if (err) | |
3752 | return err; | |
3753 | ||
3754 | init_free_segmap(sbi); | |
3755 | err = build_dirty_segmap(sbi); | |
3756 | if (err) | |
3757 | return err; | |
3758 | ||
3759 | init_min_max_mtime(sbi); | |
3760 | return 0; | |
3761 | } | |
3762 | ||
3763 | static void discard_dirty_segmap(struct f2fs_sb_info *sbi, | |
3764 | enum dirty_type dirty_type) | |
3765 | { | |
3766 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
3767 | ||
3768 | mutex_lock(&dirty_i->seglist_lock); | |
3769 | kvfree(dirty_i->dirty_segmap[dirty_type]); | |
3770 | dirty_i->nr_dirty[dirty_type] = 0; | |
3771 | mutex_unlock(&dirty_i->seglist_lock); | |
3772 | } | |
3773 | ||
3774 | static void destroy_victim_secmap(struct f2fs_sb_info *sbi) | |
3775 | { | |
3776 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
3777 | kvfree(dirty_i->victim_secmap); | |
3778 | } | |
3779 | ||
3780 | static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) | |
3781 | { | |
3782 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
3783 | int i; | |
3784 | ||
3785 | if (!dirty_i) | |
3786 | return; | |
3787 | ||
3788 | /* discard pre-free/dirty segments list */ | |
3789 | for (i = 0; i < NR_DIRTY_TYPE; i++) | |
3790 | discard_dirty_segmap(sbi, i); | |
3791 | ||
3792 | destroy_victim_secmap(sbi); | |
3793 | SM_I(sbi)->dirty_info = NULL; | |
3794 | kfree(dirty_i); | |
3795 | } | |
3796 | ||
3797 | static void destroy_curseg(struct f2fs_sb_info *sbi) | |
3798 | { | |
3799 | struct curseg_info *array = SM_I(sbi)->curseg_array; | |
3800 | int i; | |
3801 | ||
3802 | if (!array) | |
3803 | return; | |
3804 | SM_I(sbi)->curseg_array = NULL; | |
3805 | for (i = 0; i < NR_CURSEG_TYPE; i++) { | |
3806 | kfree(array[i].sum_blk); | |
3807 | kfree(array[i].journal); | |
3808 | } | |
3809 | kfree(array); | |
3810 | } | |
3811 | ||
3812 | static void destroy_free_segmap(struct f2fs_sb_info *sbi) | |
3813 | { | |
3814 | struct free_segmap_info *free_i = SM_I(sbi)->free_info; | |
3815 | if (!free_i) | |
3816 | return; | |
3817 | SM_I(sbi)->free_info = NULL; | |
3818 | kvfree(free_i->free_segmap); | |
3819 | kvfree(free_i->free_secmap); | |
3820 | kfree(free_i); | |
3821 | } | |
3822 | ||
3823 | static void destroy_sit_info(struct f2fs_sb_info *sbi) | |
3824 | { | |
3825 | struct sit_info *sit_i = SIT_I(sbi); | |
3826 | unsigned int start; | |
3827 | ||
3828 | if (!sit_i) | |
3829 | return; | |
3830 | ||
3831 | if (sit_i->sentries) { | |
3832 | for (start = 0; start < MAIN_SEGS(sbi); start++) { | |
3833 | kfree(sit_i->sentries[start].cur_valid_map); | |
3834 | #ifdef CONFIG_F2FS_CHECK_FS | |
3835 | kfree(sit_i->sentries[start].cur_valid_map_mir); | |
3836 | #endif | |
3837 | kfree(sit_i->sentries[start].ckpt_valid_map); | |
3838 | kfree(sit_i->sentries[start].discard_map); | |
3839 | } | |
3840 | } | |
3841 | kfree(sit_i->tmp_map); | |
3842 | ||
3843 | kvfree(sit_i->sentries); | |
3844 | kvfree(sit_i->sec_entries); | |
3845 | kvfree(sit_i->dirty_sentries_bitmap); | |
3846 | ||
3847 | SM_I(sbi)->sit_info = NULL; | |
3848 | kfree(sit_i->sit_bitmap); | |
3849 | #ifdef CONFIG_F2FS_CHECK_FS | |
3850 | kfree(sit_i->sit_bitmap_mir); | |
3851 | #endif | |
3852 | kfree(sit_i); | |
3853 | } | |
3854 | ||
3855 | void destroy_segment_manager(struct f2fs_sb_info *sbi) | |
3856 | { | |
3857 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
3858 | ||
3859 | if (!sm_info) | |
3860 | return; | |
3861 | destroy_flush_cmd_control(sbi, true); | |
3862 | destroy_discard_cmd_control(sbi); | |
3863 | destroy_dirty_segmap(sbi); | |
3864 | destroy_curseg(sbi); | |
3865 | destroy_free_segmap(sbi); | |
3866 | destroy_sit_info(sbi); | |
3867 | sbi->sm_info = NULL; | |
3868 | kfree(sm_info); | |
3869 | } | |
3870 | ||
3871 | int __init create_segment_manager_caches(void) | |
3872 | { | |
3873 | discard_entry_slab = f2fs_kmem_cache_create("discard_entry", | |
3874 | sizeof(struct discard_entry)); | |
3875 | if (!discard_entry_slab) | |
3876 | goto fail; | |
3877 | ||
3878 | discard_cmd_slab = f2fs_kmem_cache_create("discard_cmd", | |
3879 | sizeof(struct discard_cmd)); | |
3880 | if (!discard_cmd_slab) | |
3881 | goto destroy_discard_entry; | |
3882 | ||
3883 | sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set", | |
3884 | sizeof(struct sit_entry_set)); | |
3885 | if (!sit_entry_set_slab) | |
3886 | goto destroy_discard_cmd; | |
3887 | ||
3888 | inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry", | |
3889 | sizeof(struct inmem_pages)); | |
3890 | if (!inmem_entry_slab) | |
3891 | goto destroy_sit_entry_set; | |
3892 | return 0; | |
3893 | ||
3894 | destroy_sit_entry_set: | |
3895 | kmem_cache_destroy(sit_entry_set_slab); | |
3896 | destroy_discard_cmd: | |
3897 | kmem_cache_destroy(discard_cmd_slab); | |
3898 | destroy_discard_entry: | |
3899 | kmem_cache_destroy(discard_entry_slab); | |
3900 | fail: | |
3901 | return -ENOMEM; | |
3902 | } | |
3903 | ||
3904 | void destroy_segment_manager_caches(void) | |
3905 | { | |
3906 | kmem_cache_destroy(sit_entry_set_slab); | |
3907 | kmem_cache_destroy(discard_cmd_slab); | |
3908 | kmem_cache_destroy(discard_entry_slab); | |
3909 | kmem_cache_destroy(inmem_entry_slab); | |
3910 | } |