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Commit | Line | Data |
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0a8165d7 | 1 | /* |
351df4b2 JK |
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> | |
690e4a3e | 15 | #include <linux/prefetch.h> |
351df4b2 JK |
16 | #include <linux/vmalloc.h> |
17 | ||
18 | #include "f2fs.h" | |
19 | #include "segment.h" | |
20 | #include "node.h" | |
21 | ||
0a8165d7 | 22 | /* |
351df4b2 JK |
23 | * This function balances dirty node and dentry pages. |
24 | * In addition, it controls garbage collection. | |
25 | */ | |
26 | void f2fs_balance_fs(struct f2fs_sb_info *sbi) | |
27 | { | |
351df4b2 | 28 | /* |
029cd28c JK |
29 | * We should do GC or end up with checkpoint, if there are so many dirty |
30 | * dir/node pages without enough free segments. | |
351df4b2 | 31 | */ |
43727527 | 32 | if (has_not_enough_free_secs(sbi, 0)) { |
351df4b2 | 33 | mutex_lock(&sbi->gc_mutex); |
408e9375 | 34 | f2fs_gc(sbi); |
351df4b2 JK |
35 | } |
36 | } | |
37 | ||
38 | static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
39 | enum dirty_type dirty_type) | |
40 | { | |
41 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
42 | ||
43 | /* need not be added */ | |
44 | if (IS_CURSEG(sbi, segno)) | |
45 | return; | |
46 | ||
47 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
48 | dirty_i->nr_dirty[dirty_type]++; | |
49 | ||
50 | if (dirty_type == DIRTY) { | |
51 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
52 | dirty_type = sentry->type; | |
53 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
54 | dirty_i->nr_dirty[dirty_type]++; | |
55 | } | |
56 | } | |
57 | ||
58 | static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
59 | enum dirty_type dirty_type) | |
60 | { | |
61 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
62 | ||
63 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
64 | dirty_i->nr_dirty[dirty_type]--; | |
65 | ||
66 | if (dirty_type == DIRTY) { | |
67 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
68 | dirty_type = sentry->type; | |
69 | if (test_and_clear_bit(segno, | |
70 | dirty_i->dirty_segmap[dirty_type])) | |
71 | dirty_i->nr_dirty[dirty_type]--; | |
5ec4e49f JK |
72 | if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0) |
73 | clear_bit(GET_SECNO(sbi, segno), | |
74 | dirty_i->victim_secmap); | |
351df4b2 JK |
75 | } |
76 | } | |
77 | ||
0a8165d7 | 78 | /* |
351df4b2 JK |
79 | * Should not occur error such as -ENOMEM. |
80 | * Adding dirty entry into seglist is not critical operation. | |
81 | * If a given segment is one of current working segments, it won't be added. | |
82 | */ | |
83 | void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) | |
84 | { | |
85 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
86 | unsigned short valid_blocks; | |
87 | ||
88 | if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) | |
89 | return; | |
90 | ||
91 | mutex_lock(&dirty_i->seglist_lock); | |
92 | ||
93 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
94 | ||
95 | if (valid_blocks == 0) { | |
96 | __locate_dirty_segment(sbi, segno, PRE); | |
97 | __remove_dirty_segment(sbi, segno, DIRTY); | |
98 | } else if (valid_blocks < sbi->blocks_per_seg) { | |
99 | __locate_dirty_segment(sbi, segno, DIRTY); | |
100 | } else { | |
101 | /* Recovery routine with SSR needs this */ | |
102 | __remove_dirty_segment(sbi, segno, DIRTY); | |
103 | } | |
104 | ||
105 | mutex_unlock(&dirty_i->seglist_lock); | |
106 | return; | |
107 | } | |
108 | ||
0a8165d7 | 109 | /* |
351df4b2 JK |
110 | * Should call clear_prefree_segments after checkpoint is done. |
111 | */ | |
112 | static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) | |
113 | { | |
114 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
115 | unsigned int segno, offset = 0; | |
116 | unsigned int total_segs = TOTAL_SEGS(sbi); | |
117 | ||
118 | mutex_lock(&dirty_i->seglist_lock); | |
119 | while (1) { | |
120 | segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, | |
121 | offset); | |
122 | if (segno >= total_segs) | |
123 | break; | |
124 | __set_test_and_free(sbi, segno); | |
125 | offset = segno + 1; | |
126 | } | |
127 | mutex_unlock(&dirty_i->seglist_lock); | |
128 | } | |
129 | ||
130 | void clear_prefree_segments(struct f2fs_sb_info *sbi) | |
131 | { | |
132 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
133 | unsigned int segno, offset = 0; | |
134 | unsigned int total_segs = TOTAL_SEGS(sbi); | |
135 | ||
136 | mutex_lock(&dirty_i->seglist_lock); | |
137 | while (1) { | |
138 | segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, | |
139 | offset); | |
140 | if (segno >= total_segs) | |
141 | break; | |
142 | ||
143 | offset = segno + 1; | |
144 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE])) | |
145 | dirty_i->nr_dirty[PRE]--; | |
146 | ||
147 | /* Let's use trim */ | |
148 | if (test_opt(sbi, DISCARD)) | |
149 | blkdev_issue_discard(sbi->sb->s_bdev, | |
150 | START_BLOCK(sbi, segno) << | |
151 | sbi->log_sectors_per_block, | |
152 | 1 << (sbi->log_sectors_per_block + | |
153 | sbi->log_blocks_per_seg), | |
154 | GFP_NOFS, 0); | |
155 | } | |
156 | mutex_unlock(&dirty_i->seglist_lock); | |
157 | } | |
158 | ||
159 | static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) | |
160 | { | |
161 | struct sit_info *sit_i = SIT_I(sbi); | |
162 | if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) | |
163 | sit_i->dirty_sentries++; | |
164 | } | |
165 | ||
166 | static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, | |
167 | unsigned int segno, int modified) | |
168 | { | |
169 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
170 | se->type = type; | |
171 | if (modified) | |
172 | __mark_sit_entry_dirty(sbi, segno); | |
173 | } | |
174 | ||
175 | static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) | |
176 | { | |
177 | struct seg_entry *se; | |
178 | unsigned int segno, offset; | |
179 | long int new_vblocks; | |
180 | ||
181 | segno = GET_SEGNO(sbi, blkaddr); | |
182 | ||
183 | se = get_seg_entry(sbi, segno); | |
184 | new_vblocks = se->valid_blocks + del; | |
185 | offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1); | |
186 | ||
187 | BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) || | |
188 | (new_vblocks > sbi->blocks_per_seg))); | |
189 | ||
190 | se->valid_blocks = new_vblocks; | |
191 | se->mtime = get_mtime(sbi); | |
192 | SIT_I(sbi)->max_mtime = se->mtime; | |
193 | ||
194 | /* Update valid block bitmap */ | |
195 | if (del > 0) { | |
196 | if (f2fs_set_bit(offset, se->cur_valid_map)) | |
197 | BUG(); | |
198 | } else { | |
199 | if (!f2fs_clear_bit(offset, se->cur_valid_map)) | |
200 | BUG(); | |
201 | } | |
202 | if (!f2fs_test_bit(offset, se->ckpt_valid_map)) | |
203 | se->ckpt_valid_blocks += del; | |
204 | ||
205 | __mark_sit_entry_dirty(sbi, segno); | |
206 | ||
207 | /* update total number of valid blocks to be written in ckpt area */ | |
208 | SIT_I(sbi)->written_valid_blocks += del; | |
209 | ||
210 | if (sbi->segs_per_sec > 1) | |
211 | get_sec_entry(sbi, segno)->valid_blocks += del; | |
212 | } | |
213 | ||
214 | static void refresh_sit_entry(struct f2fs_sb_info *sbi, | |
215 | block_t old_blkaddr, block_t new_blkaddr) | |
216 | { | |
217 | update_sit_entry(sbi, new_blkaddr, 1); | |
218 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) | |
219 | update_sit_entry(sbi, old_blkaddr, -1); | |
220 | } | |
221 | ||
222 | void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) | |
223 | { | |
224 | unsigned int segno = GET_SEGNO(sbi, addr); | |
225 | struct sit_info *sit_i = SIT_I(sbi); | |
226 | ||
227 | BUG_ON(addr == NULL_ADDR); | |
228 | if (addr == NEW_ADDR) | |
229 | return; | |
230 | ||
231 | /* add it into sit main buffer */ | |
232 | mutex_lock(&sit_i->sentry_lock); | |
233 | ||
234 | update_sit_entry(sbi, addr, -1); | |
235 | ||
236 | /* add it into dirty seglist */ | |
237 | locate_dirty_segment(sbi, segno); | |
238 | ||
239 | mutex_unlock(&sit_i->sentry_lock); | |
240 | } | |
241 | ||
0a8165d7 | 242 | /* |
351df4b2 JK |
243 | * This function should be resided under the curseg_mutex lock |
244 | */ | |
245 | static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, | |
246 | struct f2fs_summary *sum, unsigned short offset) | |
247 | { | |
248 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
249 | void *addr = curseg->sum_blk; | |
250 | addr += offset * sizeof(struct f2fs_summary); | |
251 | memcpy(addr, sum, sizeof(struct f2fs_summary)); | |
252 | return; | |
253 | } | |
254 | ||
0a8165d7 | 255 | /* |
351df4b2 JK |
256 | * Calculate the number of current summary pages for writing |
257 | */ | |
258 | int npages_for_summary_flush(struct f2fs_sb_info *sbi) | |
259 | { | |
260 | int total_size_bytes = 0; | |
261 | int valid_sum_count = 0; | |
262 | int i, sum_space; | |
263 | ||
264 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
265 | if (sbi->ckpt->alloc_type[i] == SSR) | |
266 | valid_sum_count += sbi->blocks_per_seg; | |
267 | else | |
268 | valid_sum_count += curseg_blkoff(sbi, i); | |
269 | } | |
270 | ||
271 | total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1) | |
272 | + sizeof(struct nat_journal) + 2 | |
273 | + sizeof(struct sit_journal) + 2; | |
274 | sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE; | |
275 | if (total_size_bytes < sum_space) | |
276 | return 1; | |
277 | else if (total_size_bytes < 2 * sum_space) | |
278 | return 2; | |
279 | return 3; | |
280 | } | |
281 | ||
0a8165d7 | 282 | /* |
351df4b2 JK |
283 | * Caller should put this summary page |
284 | */ | |
285 | struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) | |
286 | { | |
287 | return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); | |
288 | } | |
289 | ||
290 | static void write_sum_page(struct f2fs_sb_info *sbi, | |
291 | struct f2fs_summary_block *sum_blk, block_t blk_addr) | |
292 | { | |
293 | struct page *page = grab_meta_page(sbi, blk_addr); | |
294 | void *kaddr = page_address(page); | |
295 | memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE); | |
296 | set_page_dirty(page); | |
297 | f2fs_put_page(page, 1); | |
298 | } | |
299 | ||
5ec4e49f | 300 | static unsigned int check_prefree_segments(struct f2fs_sb_info *sbi, int type) |
351df4b2 JK |
301 | { |
302 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
303 | unsigned long *prefree_segmap = dirty_i->dirty_segmap[PRE]; | |
5ec4e49f JK |
304 | unsigned int segno; |
305 | unsigned int ofs = 0; | |
351df4b2 JK |
306 | |
307 | /* | |
308 | * If there is not enough reserved sections, | |
309 | * we should not reuse prefree segments. | |
310 | */ | |
43727527 | 311 | if (has_not_enough_free_secs(sbi, 0)) |
351df4b2 JK |
312 | return NULL_SEGNO; |
313 | ||
314 | /* | |
315 | * NODE page should not reuse prefree segment, | |
316 | * since those information is used for SPOR. | |
317 | */ | |
318 | if (IS_NODESEG(type)) | |
319 | return NULL_SEGNO; | |
320 | next: | |
5ec4e49f JK |
321 | segno = find_next_bit(prefree_segmap, TOTAL_SEGS(sbi), ofs); |
322 | ofs += sbi->segs_per_sec; | |
323 | ||
351df4b2 | 324 | if (segno < TOTAL_SEGS(sbi)) { |
5ec4e49f JK |
325 | int i; |
326 | ||
351df4b2 | 327 | /* skip intermediate segments in a section */ |
5ec4e49f | 328 | if (segno % sbi->segs_per_sec) |
351df4b2 JK |
329 | goto next; |
330 | ||
5ec4e49f JK |
331 | /* skip if the section is currently used */ |
332 | if (sec_usage_check(sbi, GET_SECNO(sbi, segno))) | |
351df4b2 JK |
333 | goto next; |
334 | ||
5ec4e49f JK |
335 | /* skip if whole section is not prefree */ |
336 | for (i = 1; i < sbi->segs_per_sec; i++) | |
337 | if (!test_bit(segno + i, prefree_segmap)) | |
338 | goto next; | |
339 | ||
351df4b2 | 340 | /* skip if whole section was not free at the last checkpoint */ |
5ec4e49f JK |
341 | for (i = 0; i < sbi->segs_per_sec; i++) |
342 | if (get_seg_entry(sbi, segno + i)->ckpt_valid_blocks) | |
351df4b2 | 343 | goto next; |
5ec4e49f | 344 | |
351df4b2 JK |
345 | return segno; |
346 | } | |
347 | return NULL_SEGNO; | |
348 | } | |
349 | ||
0a8165d7 | 350 | /* |
351df4b2 JK |
351 | * Find a new segment from the free segments bitmap to right order |
352 | * This function should be returned with success, otherwise BUG | |
353 | */ | |
354 | static void get_new_segment(struct f2fs_sb_info *sbi, | |
355 | unsigned int *newseg, bool new_sec, int dir) | |
356 | { | |
357 | struct free_segmap_info *free_i = FREE_I(sbi); | |
351df4b2 | 358 | unsigned int segno, secno, zoneno; |
53cf9522 | 359 | unsigned int total_zones = TOTAL_SECS(sbi) / sbi->secs_per_zone; |
351df4b2 JK |
360 | unsigned int hint = *newseg / sbi->segs_per_sec; |
361 | unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg); | |
362 | unsigned int left_start = hint; | |
363 | bool init = true; | |
364 | int go_left = 0; | |
365 | int i; | |
366 | ||
367 | write_lock(&free_i->segmap_lock); | |
368 | ||
369 | if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { | |
370 | segno = find_next_zero_bit(free_i->free_segmap, | |
371 | TOTAL_SEGS(sbi), *newseg + 1); | |
33afa7fd JK |
372 | if (segno - *newseg < sbi->segs_per_sec - |
373 | (*newseg % sbi->segs_per_sec)) | |
351df4b2 JK |
374 | goto got_it; |
375 | } | |
376 | find_other_zone: | |
53cf9522 JK |
377 | secno = find_next_zero_bit(free_i->free_secmap, TOTAL_SECS(sbi), hint); |
378 | if (secno >= TOTAL_SECS(sbi)) { | |
351df4b2 JK |
379 | if (dir == ALLOC_RIGHT) { |
380 | secno = find_next_zero_bit(free_i->free_secmap, | |
53cf9522 JK |
381 | TOTAL_SECS(sbi), 0); |
382 | BUG_ON(secno >= TOTAL_SECS(sbi)); | |
351df4b2 JK |
383 | } else { |
384 | go_left = 1; | |
385 | left_start = hint - 1; | |
386 | } | |
387 | } | |
388 | if (go_left == 0) | |
389 | goto skip_left; | |
390 | ||
391 | while (test_bit(left_start, free_i->free_secmap)) { | |
392 | if (left_start > 0) { | |
393 | left_start--; | |
394 | continue; | |
395 | } | |
396 | left_start = find_next_zero_bit(free_i->free_secmap, | |
53cf9522 JK |
397 | TOTAL_SECS(sbi), 0); |
398 | BUG_ON(left_start >= TOTAL_SECS(sbi)); | |
351df4b2 JK |
399 | break; |
400 | } | |
401 | secno = left_start; | |
402 | skip_left: | |
403 | hint = secno; | |
404 | segno = secno * sbi->segs_per_sec; | |
405 | zoneno = secno / sbi->secs_per_zone; | |
406 | ||
407 | /* give up on finding another zone */ | |
408 | if (!init) | |
409 | goto got_it; | |
410 | if (sbi->secs_per_zone == 1) | |
411 | goto got_it; | |
412 | if (zoneno == old_zoneno) | |
413 | goto got_it; | |
414 | if (dir == ALLOC_LEFT) { | |
415 | if (!go_left && zoneno + 1 >= total_zones) | |
416 | goto got_it; | |
417 | if (go_left && zoneno == 0) | |
418 | goto got_it; | |
419 | } | |
420 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
421 | if (CURSEG_I(sbi, i)->zone == zoneno) | |
422 | break; | |
423 | ||
424 | if (i < NR_CURSEG_TYPE) { | |
425 | /* zone is in user, try another */ | |
426 | if (go_left) | |
427 | hint = zoneno * sbi->secs_per_zone - 1; | |
428 | else if (zoneno + 1 >= total_zones) | |
429 | hint = 0; | |
430 | else | |
431 | hint = (zoneno + 1) * sbi->secs_per_zone; | |
432 | init = false; | |
433 | goto find_other_zone; | |
434 | } | |
435 | got_it: | |
436 | /* set it as dirty segment in free segmap */ | |
437 | BUG_ON(test_bit(segno, free_i->free_segmap)); | |
438 | __set_inuse(sbi, segno); | |
439 | *newseg = segno; | |
440 | write_unlock(&free_i->segmap_lock); | |
441 | } | |
442 | ||
443 | static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) | |
444 | { | |
445 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
446 | struct summary_footer *sum_footer; | |
447 | ||
448 | curseg->segno = curseg->next_segno; | |
449 | curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno); | |
450 | curseg->next_blkoff = 0; | |
451 | curseg->next_segno = NULL_SEGNO; | |
452 | ||
453 | sum_footer = &(curseg->sum_blk->footer); | |
454 | memset(sum_footer, 0, sizeof(struct summary_footer)); | |
455 | if (IS_DATASEG(type)) | |
456 | SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); | |
457 | if (IS_NODESEG(type)) | |
458 | SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); | |
459 | __set_sit_entry_type(sbi, type, curseg->segno, modified); | |
460 | } | |
461 | ||
0a8165d7 | 462 | /* |
351df4b2 JK |
463 | * Allocate a current working segment. |
464 | * This function always allocates a free segment in LFS manner. | |
465 | */ | |
466 | static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) | |
467 | { | |
468 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
469 | unsigned int segno = curseg->segno; | |
470 | int dir = ALLOC_LEFT; | |
471 | ||
472 | write_sum_page(sbi, curseg->sum_blk, | |
473 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
474 | if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) | |
475 | dir = ALLOC_RIGHT; | |
476 | ||
477 | if (test_opt(sbi, NOHEAP)) | |
478 | dir = ALLOC_RIGHT; | |
479 | ||
480 | get_new_segment(sbi, &segno, new_sec, dir); | |
481 | curseg->next_segno = segno; | |
482 | reset_curseg(sbi, type, 1); | |
483 | curseg->alloc_type = LFS; | |
484 | } | |
485 | ||
486 | static void __next_free_blkoff(struct f2fs_sb_info *sbi, | |
487 | struct curseg_info *seg, block_t start) | |
488 | { | |
489 | struct seg_entry *se = get_seg_entry(sbi, seg->segno); | |
490 | block_t ofs; | |
491 | for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) { | |
492 | if (!f2fs_test_bit(ofs, se->ckpt_valid_map) | |
493 | && !f2fs_test_bit(ofs, se->cur_valid_map)) | |
494 | break; | |
495 | } | |
496 | seg->next_blkoff = ofs; | |
497 | } | |
498 | ||
0a8165d7 | 499 | /* |
351df4b2 JK |
500 | * If a segment is written by LFS manner, next block offset is just obtained |
501 | * by increasing the current block offset. However, if a segment is written by | |
502 | * SSR manner, next block offset obtained by calling __next_free_blkoff | |
503 | */ | |
504 | static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, | |
505 | struct curseg_info *seg) | |
506 | { | |
507 | if (seg->alloc_type == SSR) | |
508 | __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); | |
509 | else | |
510 | seg->next_blkoff++; | |
511 | } | |
512 | ||
0a8165d7 | 513 | /* |
351df4b2 JK |
514 | * This function always allocates a used segment (from dirty seglist) by SSR |
515 | * manner, so it should recover the existing segment information of valid blocks | |
516 | */ | |
517 | static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) | |
518 | { | |
519 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
520 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
521 | unsigned int new_segno = curseg->next_segno; | |
522 | struct f2fs_summary_block *sum_node; | |
523 | struct page *sum_page; | |
524 | ||
525 | write_sum_page(sbi, curseg->sum_blk, | |
526 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
527 | __set_test_and_inuse(sbi, new_segno); | |
528 | ||
529 | mutex_lock(&dirty_i->seglist_lock); | |
530 | __remove_dirty_segment(sbi, new_segno, PRE); | |
531 | __remove_dirty_segment(sbi, new_segno, DIRTY); | |
532 | mutex_unlock(&dirty_i->seglist_lock); | |
533 | ||
534 | reset_curseg(sbi, type, 1); | |
535 | curseg->alloc_type = SSR; | |
536 | __next_free_blkoff(sbi, curseg, 0); | |
537 | ||
538 | if (reuse) { | |
539 | sum_page = get_sum_page(sbi, new_segno); | |
540 | sum_node = (struct f2fs_summary_block *)page_address(sum_page); | |
541 | memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); | |
542 | f2fs_put_page(sum_page, 1); | |
543 | } | |
544 | } | |
545 | ||
43727527 JK |
546 | static int get_ssr_segment(struct f2fs_sb_info *sbi, int type) |
547 | { | |
548 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
549 | const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops; | |
550 | ||
551 | if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0)) | |
552 | return v_ops->get_victim(sbi, | |
553 | &(curseg)->next_segno, BG_GC, type, SSR); | |
554 | ||
555 | /* For data segments, let's do SSR more intensively */ | |
556 | for (; type >= CURSEG_HOT_DATA; type--) | |
557 | if (v_ops->get_victim(sbi, &(curseg)->next_segno, | |
558 | BG_GC, type, SSR)) | |
559 | return 1; | |
560 | return 0; | |
561 | } | |
562 | ||
351df4b2 JK |
563 | /* |
564 | * flush out current segment and replace it with new segment | |
565 | * This function should be returned with success, otherwise BUG | |
566 | */ | |
567 | static void allocate_segment_by_default(struct f2fs_sb_info *sbi, | |
568 | int type, bool force) | |
569 | { | |
570 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
351df4b2 JK |
571 | |
572 | if (force) { | |
573 | new_curseg(sbi, type, true); | |
574 | goto out; | |
575 | } | |
576 | ||
5ec4e49f | 577 | curseg->next_segno = check_prefree_segments(sbi, type); |
351df4b2 JK |
578 | |
579 | if (curseg->next_segno != NULL_SEGNO) | |
580 | change_curseg(sbi, type, false); | |
581 | else if (type == CURSEG_WARM_NODE) | |
582 | new_curseg(sbi, type, false); | |
583 | else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) | |
584 | change_curseg(sbi, type, true); | |
585 | else | |
586 | new_curseg(sbi, type, false); | |
587 | out: | |
588 | sbi->segment_count[curseg->alloc_type]++; | |
589 | } | |
590 | ||
591 | void allocate_new_segments(struct f2fs_sb_info *sbi) | |
592 | { | |
593 | struct curseg_info *curseg; | |
594 | unsigned int old_curseg; | |
595 | int i; | |
596 | ||
597 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
598 | curseg = CURSEG_I(sbi, i); | |
599 | old_curseg = curseg->segno; | |
600 | SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); | |
601 | locate_dirty_segment(sbi, old_curseg); | |
602 | } | |
603 | } | |
604 | ||
605 | static const struct segment_allocation default_salloc_ops = { | |
606 | .allocate_segment = allocate_segment_by_default, | |
607 | }; | |
608 | ||
609 | static void f2fs_end_io_write(struct bio *bio, int err) | |
610 | { | |
611 | const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); | |
612 | struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; | |
613 | struct bio_private *p = bio->bi_private; | |
614 | ||
615 | do { | |
616 | struct page *page = bvec->bv_page; | |
617 | ||
618 | if (--bvec >= bio->bi_io_vec) | |
619 | prefetchw(&bvec->bv_page->flags); | |
620 | if (!uptodate) { | |
621 | SetPageError(page); | |
622 | if (page->mapping) | |
623 | set_bit(AS_EIO, &page->mapping->flags); | |
25ca923b | 624 | set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG); |
577e3495 | 625 | p->sbi->sb->s_flags |= MS_RDONLY; |
351df4b2 JK |
626 | } |
627 | end_page_writeback(page); | |
628 | dec_page_count(p->sbi, F2FS_WRITEBACK); | |
629 | } while (bvec >= bio->bi_io_vec); | |
630 | ||
631 | if (p->is_sync) | |
632 | complete(p->wait); | |
633 | kfree(p); | |
634 | bio_put(bio); | |
635 | } | |
636 | ||
3cd8a239 | 637 | struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) |
351df4b2 JK |
638 | { |
639 | struct bio *bio; | |
3cd8a239 | 640 | struct bio_private *priv; |
351df4b2 | 641 | retry: |
3cd8a239 JK |
642 | priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); |
643 | if (!priv) { | |
351df4b2 | 644 | cond_resched(); |
c212991a | 645 | goto retry; |
351df4b2 | 646 | } |
3cd8a239 JK |
647 | |
648 | /* No failure on bio allocation */ | |
649 | bio = bio_alloc(GFP_NOIO, npages); | |
650 | bio->bi_bdev = bdev; | |
651 | bio->bi_private = priv; | |
351df4b2 JK |
652 | return bio; |
653 | } | |
654 | ||
655 | static void do_submit_bio(struct f2fs_sb_info *sbi, | |
656 | enum page_type type, bool sync) | |
657 | { | |
658 | int rw = sync ? WRITE_SYNC : WRITE; | |
659 | enum page_type btype = type > META ? META : type; | |
660 | ||
661 | if (type >= META_FLUSH) | |
662 | rw = WRITE_FLUSH_FUA; | |
663 | ||
664 | if (sbi->bio[btype]) { | |
665 | struct bio_private *p = sbi->bio[btype]->bi_private; | |
666 | p->sbi = sbi; | |
667 | sbi->bio[btype]->bi_end_io = f2fs_end_io_write; | |
668 | if (type == META_FLUSH) { | |
669 | DECLARE_COMPLETION_ONSTACK(wait); | |
670 | p->is_sync = true; | |
671 | p->wait = &wait; | |
672 | submit_bio(rw, sbi->bio[btype]); | |
673 | wait_for_completion(&wait); | |
674 | } else { | |
675 | p->is_sync = false; | |
676 | submit_bio(rw, sbi->bio[btype]); | |
677 | } | |
678 | sbi->bio[btype] = NULL; | |
679 | } | |
680 | } | |
681 | ||
682 | void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync) | |
683 | { | |
684 | down_write(&sbi->bio_sem); | |
685 | do_submit_bio(sbi, type, sync); | |
686 | up_write(&sbi->bio_sem); | |
687 | } | |
688 | ||
689 | static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, | |
690 | block_t blk_addr, enum page_type type) | |
691 | { | |
692 | struct block_device *bdev = sbi->sb->s_bdev; | |
693 | ||
694 | verify_block_addr(sbi, blk_addr); | |
695 | ||
696 | down_write(&sbi->bio_sem); | |
697 | ||
698 | inc_page_count(sbi, F2FS_WRITEBACK); | |
699 | ||
700 | if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1) | |
701 | do_submit_bio(sbi, type, false); | |
702 | alloc_new: | |
3cd8a239 JK |
703 | if (sbi->bio[type] == NULL) { |
704 | sbi->bio[type] = f2fs_bio_alloc(bdev, bio_get_nr_vecs(bdev)); | |
705 | sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); | |
706 | /* | |
707 | * The end_io will be assigned at the sumbission phase. | |
708 | * Until then, let bio_add_page() merge consecutive IOs as much | |
709 | * as possible. | |
710 | */ | |
711 | } | |
351df4b2 JK |
712 | |
713 | if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) < | |
714 | PAGE_CACHE_SIZE) { | |
715 | do_submit_bio(sbi, type, false); | |
716 | goto alloc_new; | |
717 | } | |
718 | ||
719 | sbi->last_block_in_bio[type] = blk_addr; | |
720 | ||
721 | up_write(&sbi->bio_sem); | |
722 | } | |
723 | ||
724 | static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) | |
725 | { | |
726 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
727 | if (curseg->next_blkoff < sbi->blocks_per_seg) | |
728 | return true; | |
729 | return false; | |
730 | } | |
731 | ||
732 | static int __get_segment_type_2(struct page *page, enum page_type p_type) | |
733 | { | |
734 | if (p_type == DATA) | |
735 | return CURSEG_HOT_DATA; | |
736 | else | |
737 | return CURSEG_HOT_NODE; | |
738 | } | |
739 | ||
740 | static int __get_segment_type_4(struct page *page, enum page_type p_type) | |
741 | { | |
742 | if (p_type == DATA) { | |
743 | struct inode *inode = page->mapping->host; | |
744 | ||
745 | if (S_ISDIR(inode->i_mode)) | |
746 | return CURSEG_HOT_DATA; | |
747 | else | |
748 | return CURSEG_COLD_DATA; | |
749 | } else { | |
750 | if (IS_DNODE(page) && !is_cold_node(page)) | |
751 | return CURSEG_HOT_NODE; | |
752 | else | |
753 | return CURSEG_COLD_NODE; | |
754 | } | |
755 | } | |
756 | ||
757 | static int __get_segment_type_6(struct page *page, enum page_type p_type) | |
758 | { | |
759 | if (p_type == DATA) { | |
760 | struct inode *inode = page->mapping->host; | |
761 | ||
762 | if (S_ISDIR(inode->i_mode)) | |
763 | return CURSEG_HOT_DATA; | |
764 | else if (is_cold_data(page) || is_cold_file(inode)) | |
765 | return CURSEG_COLD_DATA; | |
766 | else | |
767 | return CURSEG_WARM_DATA; | |
768 | } else { | |
769 | if (IS_DNODE(page)) | |
770 | return is_cold_node(page) ? CURSEG_WARM_NODE : | |
771 | CURSEG_HOT_NODE; | |
772 | else | |
773 | return CURSEG_COLD_NODE; | |
774 | } | |
775 | } | |
776 | ||
777 | static int __get_segment_type(struct page *page, enum page_type p_type) | |
778 | { | |
779 | struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); | |
780 | switch (sbi->active_logs) { | |
781 | case 2: | |
782 | return __get_segment_type_2(page, p_type); | |
783 | case 4: | |
784 | return __get_segment_type_4(page, p_type); | |
351df4b2 | 785 | } |
12a67146 JK |
786 | /* NR_CURSEG_TYPE(6) logs by default */ |
787 | BUG_ON(sbi->active_logs != NR_CURSEG_TYPE); | |
788 | return __get_segment_type_6(page, p_type); | |
351df4b2 JK |
789 | } |
790 | ||
791 | static void do_write_page(struct f2fs_sb_info *sbi, struct page *page, | |
792 | block_t old_blkaddr, block_t *new_blkaddr, | |
793 | struct f2fs_summary *sum, enum page_type p_type) | |
794 | { | |
795 | struct sit_info *sit_i = SIT_I(sbi); | |
796 | struct curseg_info *curseg; | |
797 | unsigned int old_cursegno; | |
798 | int type; | |
799 | ||
800 | type = __get_segment_type(page, p_type); | |
801 | curseg = CURSEG_I(sbi, type); | |
802 | ||
803 | mutex_lock(&curseg->curseg_mutex); | |
804 | ||
805 | *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); | |
806 | old_cursegno = curseg->segno; | |
807 | ||
808 | /* | |
809 | * __add_sum_entry should be resided under the curseg_mutex | |
810 | * because, this function updates a summary entry in the | |
811 | * current summary block. | |
812 | */ | |
813 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
814 | ||
815 | mutex_lock(&sit_i->sentry_lock); | |
816 | __refresh_next_blkoff(sbi, curseg); | |
817 | sbi->block_count[curseg->alloc_type]++; | |
818 | ||
819 | /* | |
820 | * SIT information should be updated before segment allocation, | |
821 | * since SSR needs latest valid block information. | |
822 | */ | |
823 | refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr); | |
824 | ||
825 | if (!__has_curseg_space(sbi, type)) | |
826 | sit_i->s_ops->allocate_segment(sbi, type, false); | |
827 | ||
828 | locate_dirty_segment(sbi, old_cursegno); | |
829 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
830 | mutex_unlock(&sit_i->sentry_lock); | |
831 | ||
832 | if (p_type == NODE) | |
833 | fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); | |
834 | ||
835 | /* writeout dirty page into bdev */ | |
836 | submit_write_page(sbi, page, *new_blkaddr, p_type); | |
837 | ||
838 | mutex_unlock(&curseg->curseg_mutex); | |
839 | } | |
840 | ||
577e3495 | 841 | void write_meta_page(struct f2fs_sb_info *sbi, struct page *page) |
351df4b2 | 842 | { |
351df4b2 JK |
843 | set_page_writeback(page); |
844 | submit_write_page(sbi, page, page->index, META); | |
351df4b2 JK |
845 | } |
846 | ||
847 | void write_node_page(struct f2fs_sb_info *sbi, struct page *page, | |
848 | unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr) | |
849 | { | |
850 | struct f2fs_summary sum; | |
851 | set_summary(&sum, nid, 0, 0); | |
852 | do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE); | |
853 | } | |
854 | ||
855 | void write_data_page(struct inode *inode, struct page *page, | |
856 | struct dnode_of_data *dn, block_t old_blkaddr, | |
857 | block_t *new_blkaddr) | |
858 | { | |
859 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
860 | struct f2fs_summary sum; | |
861 | struct node_info ni; | |
862 | ||
863 | BUG_ON(old_blkaddr == NULL_ADDR); | |
864 | get_node_info(sbi, dn->nid, &ni); | |
865 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
866 | ||
867 | do_write_page(sbi, page, old_blkaddr, | |
868 | new_blkaddr, &sum, DATA); | |
869 | } | |
870 | ||
871 | void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page, | |
872 | block_t old_blk_addr) | |
873 | { | |
874 | submit_write_page(sbi, page, old_blk_addr, DATA); | |
875 | } | |
876 | ||
877 | void recover_data_page(struct f2fs_sb_info *sbi, | |
878 | struct page *page, struct f2fs_summary *sum, | |
879 | block_t old_blkaddr, block_t new_blkaddr) | |
880 | { | |
881 | struct sit_info *sit_i = SIT_I(sbi); | |
882 | struct curseg_info *curseg; | |
883 | unsigned int segno, old_cursegno; | |
884 | struct seg_entry *se; | |
885 | int type; | |
886 | ||
887 | segno = GET_SEGNO(sbi, new_blkaddr); | |
888 | se = get_seg_entry(sbi, segno); | |
889 | type = se->type; | |
890 | ||
891 | if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { | |
892 | if (old_blkaddr == NULL_ADDR) | |
893 | type = CURSEG_COLD_DATA; | |
894 | else | |
895 | type = CURSEG_WARM_DATA; | |
896 | } | |
897 | curseg = CURSEG_I(sbi, type); | |
898 | ||
899 | mutex_lock(&curseg->curseg_mutex); | |
900 | mutex_lock(&sit_i->sentry_lock); | |
901 | ||
902 | old_cursegno = curseg->segno; | |
903 | ||
904 | /* change the current segment */ | |
905 | if (segno != curseg->segno) { | |
906 | curseg->next_segno = segno; | |
907 | change_curseg(sbi, type, true); | |
908 | } | |
909 | ||
910 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & | |
911 | (sbi->blocks_per_seg - 1); | |
912 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
913 | ||
914 | refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); | |
915 | ||
916 | locate_dirty_segment(sbi, old_cursegno); | |
917 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
918 | ||
919 | mutex_unlock(&sit_i->sentry_lock); | |
920 | mutex_unlock(&curseg->curseg_mutex); | |
921 | } | |
922 | ||
923 | void rewrite_node_page(struct f2fs_sb_info *sbi, | |
924 | struct page *page, struct f2fs_summary *sum, | |
925 | block_t old_blkaddr, block_t new_blkaddr) | |
926 | { | |
927 | struct sit_info *sit_i = SIT_I(sbi); | |
928 | int type = CURSEG_WARM_NODE; | |
929 | struct curseg_info *curseg; | |
930 | unsigned int segno, old_cursegno; | |
931 | block_t next_blkaddr = next_blkaddr_of_node(page); | |
932 | unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr); | |
933 | ||
934 | curseg = CURSEG_I(sbi, type); | |
935 | ||
936 | mutex_lock(&curseg->curseg_mutex); | |
937 | mutex_lock(&sit_i->sentry_lock); | |
938 | ||
939 | segno = GET_SEGNO(sbi, new_blkaddr); | |
940 | old_cursegno = curseg->segno; | |
941 | ||
942 | /* change the current segment */ | |
943 | if (segno != curseg->segno) { | |
944 | curseg->next_segno = segno; | |
945 | change_curseg(sbi, type, true); | |
946 | } | |
947 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & | |
948 | (sbi->blocks_per_seg - 1); | |
949 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
950 | ||
951 | /* change the current log to the next block addr in advance */ | |
952 | if (next_segno != segno) { | |
953 | curseg->next_segno = next_segno; | |
954 | change_curseg(sbi, type, true); | |
955 | } | |
956 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) & | |
957 | (sbi->blocks_per_seg - 1); | |
958 | ||
959 | /* rewrite node page */ | |
960 | set_page_writeback(page); | |
961 | submit_write_page(sbi, page, new_blkaddr, NODE); | |
962 | f2fs_submit_bio(sbi, NODE, true); | |
963 | refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); | |
964 | ||
965 | locate_dirty_segment(sbi, old_cursegno); | |
966 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
967 | ||
968 | mutex_unlock(&sit_i->sentry_lock); | |
969 | mutex_unlock(&curseg->curseg_mutex); | |
970 | } | |
971 | ||
972 | static int read_compacted_summaries(struct f2fs_sb_info *sbi) | |
973 | { | |
974 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
975 | struct curseg_info *seg_i; | |
976 | unsigned char *kaddr; | |
977 | struct page *page; | |
978 | block_t start; | |
979 | int i, j, offset; | |
980 | ||
981 | start = start_sum_block(sbi); | |
982 | ||
983 | page = get_meta_page(sbi, start++); | |
984 | kaddr = (unsigned char *)page_address(page); | |
985 | ||
986 | /* Step 1: restore nat cache */ | |
987 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
988 | memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE); | |
989 | ||
990 | /* Step 2: restore sit cache */ | |
991 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
992 | memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE, | |
993 | SUM_JOURNAL_SIZE); | |
994 | offset = 2 * SUM_JOURNAL_SIZE; | |
995 | ||
996 | /* Step 3: restore summary entries */ | |
997 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
998 | unsigned short blk_off; | |
999 | unsigned int segno; | |
1000 | ||
1001 | seg_i = CURSEG_I(sbi, i); | |
1002 | segno = le32_to_cpu(ckpt->cur_data_segno[i]); | |
1003 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]); | |
1004 | seg_i->next_segno = segno; | |
1005 | reset_curseg(sbi, i, 0); | |
1006 | seg_i->alloc_type = ckpt->alloc_type[i]; | |
1007 | seg_i->next_blkoff = blk_off; | |
1008 | ||
1009 | if (seg_i->alloc_type == SSR) | |
1010 | blk_off = sbi->blocks_per_seg; | |
1011 | ||
1012 | for (j = 0; j < blk_off; j++) { | |
1013 | struct f2fs_summary *s; | |
1014 | s = (struct f2fs_summary *)(kaddr + offset); | |
1015 | seg_i->sum_blk->entries[j] = *s; | |
1016 | offset += SUMMARY_SIZE; | |
1017 | if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1018 | SUM_FOOTER_SIZE) | |
1019 | continue; | |
1020 | ||
1021 | f2fs_put_page(page, 1); | |
1022 | page = NULL; | |
1023 | ||
1024 | page = get_meta_page(sbi, start++); | |
1025 | kaddr = (unsigned char *)page_address(page); | |
1026 | offset = 0; | |
1027 | } | |
1028 | } | |
1029 | f2fs_put_page(page, 1); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) | |
1034 | { | |
1035 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1036 | struct f2fs_summary_block *sum; | |
1037 | struct curseg_info *curseg; | |
1038 | struct page *new; | |
1039 | unsigned short blk_off; | |
1040 | unsigned int segno = 0; | |
1041 | block_t blk_addr = 0; | |
1042 | ||
1043 | /* get segment number and block addr */ | |
1044 | if (IS_DATASEG(type)) { | |
1045 | segno = le32_to_cpu(ckpt->cur_data_segno[type]); | |
1046 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - | |
1047 | CURSEG_HOT_DATA]); | |
25ca923b | 1048 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1049 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); |
1050 | else | |
1051 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); | |
1052 | } else { | |
1053 | segno = le32_to_cpu(ckpt->cur_node_segno[type - | |
1054 | CURSEG_HOT_NODE]); | |
1055 | blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - | |
1056 | CURSEG_HOT_NODE]); | |
25ca923b | 1057 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1058 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, |
1059 | type - CURSEG_HOT_NODE); | |
1060 | else | |
1061 | blk_addr = GET_SUM_BLOCK(sbi, segno); | |
1062 | } | |
1063 | ||
1064 | new = get_meta_page(sbi, blk_addr); | |
1065 | sum = (struct f2fs_summary_block *)page_address(new); | |
1066 | ||
1067 | if (IS_NODESEG(type)) { | |
25ca923b | 1068 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) { |
351df4b2 JK |
1069 | struct f2fs_summary *ns = &sum->entries[0]; |
1070 | int i; | |
1071 | for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { | |
1072 | ns->version = 0; | |
1073 | ns->ofs_in_node = 0; | |
1074 | } | |
1075 | } else { | |
1076 | if (restore_node_summary(sbi, segno, sum)) { | |
1077 | f2fs_put_page(new, 1); | |
1078 | return -EINVAL; | |
1079 | } | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | /* set uncompleted segment to curseg */ | |
1084 | curseg = CURSEG_I(sbi, type); | |
1085 | mutex_lock(&curseg->curseg_mutex); | |
1086 | memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE); | |
1087 | curseg->next_segno = segno; | |
1088 | reset_curseg(sbi, type, 0); | |
1089 | curseg->alloc_type = ckpt->alloc_type[type]; | |
1090 | curseg->next_blkoff = blk_off; | |
1091 | mutex_unlock(&curseg->curseg_mutex); | |
1092 | f2fs_put_page(new, 1); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | static int restore_curseg_summaries(struct f2fs_sb_info *sbi) | |
1097 | { | |
1098 | int type = CURSEG_HOT_DATA; | |
1099 | ||
25ca923b | 1100 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { |
351df4b2 JK |
1101 | /* restore for compacted data summary */ |
1102 | if (read_compacted_summaries(sbi)) | |
1103 | return -EINVAL; | |
1104 | type = CURSEG_HOT_NODE; | |
1105 | } | |
1106 | ||
1107 | for (; type <= CURSEG_COLD_NODE; type++) | |
1108 | if (read_normal_summaries(sbi, type)) | |
1109 | return -EINVAL; | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1114 | { | |
1115 | struct page *page; | |
1116 | unsigned char *kaddr; | |
1117 | struct f2fs_summary *summary; | |
1118 | struct curseg_info *seg_i; | |
1119 | int written_size = 0; | |
1120 | int i, j; | |
1121 | ||
1122 | page = grab_meta_page(sbi, blkaddr++); | |
1123 | kaddr = (unsigned char *)page_address(page); | |
1124 | ||
1125 | /* Step 1: write nat cache */ | |
1126 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1127 | memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE); | |
1128 | written_size += SUM_JOURNAL_SIZE; | |
1129 | ||
1130 | /* Step 2: write sit cache */ | |
1131 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1132 | memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits, | |
1133 | SUM_JOURNAL_SIZE); | |
1134 | written_size += SUM_JOURNAL_SIZE; | |
1135 | ||
1136 | set_page_dirty(page); | |
1137 | ||
1138 | /* Step 3: write summary entries */ | |
1139 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1140 | unsigned short blkoff; | |
1141 | seg_i = CURSEG_I(sbi, i); | |
1142 | if (sbi->ckpt->alloc_type[i] == SSR) | |
1143 | blkoff = sbi->blocks_per_seg; | |
1144 | else | |
1145 | blkoff = curseg_blkoff(sbi, i); | |
1146 | ||
1147 | for (j = 0; j < blkoff; j++) { | |
1148 | if (!page) { | |
1149 | page = grab_meta_page(sbi, blkaddr++); | |
1150 | kaddr = (unsigned char *)page_address(page); | |
1151 | written_size = 0; | |
1152 | } | |
1153 | summary = (struct f2fs_summary *)(kaddr + written_size); | |
1154 | *summary = seg_i->sum_blk->entries[j]; | |
1155 | written_size += SUMMARY_SIZE; | |
1156 | set_page_dirty(page); | |
1157 | ||
1158 | if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1159 | SUM_FOOTER_SIZE) | |
1160 | continue; | |
1161 | ||
1162 | f2fs_put_page(page, 1); | |
1163 | page = NULL; | |
1164 | } | |
1165 | } | |
1166 | if (page) | |
1167 | f2fs_put_page(page, 1); | |
1168 | } | |
1169 | ||
1170 | static void write_normal_summaries(struct f2fs_sb_info *sbi, | |
1171 | block_t blkaddr, int type) | |
1172 | { | |
1173 | int i, end; | |
1174 | if (IS_DATASEG(type)) | |
1175 | end = type + NR_CURSEG_DATA_TYPE; | |
1176 | else | |
1177 | end = type + NR_CURSEG_NODE_TYPE; | |
1178 | ||
1179 | for (i = type; i < end; i++) { | |
1180 | struct curseg_info *sum = CURSEG_I(sbi, i); | |
1181 | mutex_lock(&sum->curseg_mutex); | |
1182 | write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type)); | |
1183 | mutex_unlock(&sum->curseg_mutex); | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1188 | { | |
25ca923b | 1189 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) |
351df4b2 JK |
1190 | write_compacted_summaries(sbi, start_blk); |
1191 | else | |
1192 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); | |
1193 | } | |
1194 | ||
1195 | void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1196 | { | |
25ca923b | 1197 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) |
351df4b2 JK |
1198 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, | |
1203 | unsigned int val, int alloc) | |
1204 | { | |
1205 | int i; | |
1206 | ||
1207 | if (type == NAT_JOURNAL) { | |
1208 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1209 | if (le32_to_cpu(nid_in_journal(sum, i)) == val) | |
1210 | return i; | |
1211 | } | |
1212 | if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) | |
1213 | return update_nats_in_cursum(sum, 1); | |
1214 | } else if (type == SIT_JOURNAL) { | |
1215 | for (i = 0; i < sits_in_cursum(sum); i++) | |
1216 | if (le32_to_cpu(segno_in_journal(sum, i)) == val) | |
1217 | return i; | |
1218 | if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES) | |
1219 | return update_sits_in_cursum(sum, 1); | |
1220 | } | |
1221 | return -1; | |
1222 | } | |
1223 | ||
1224 | static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, | |
1225 | unsigned int segno) | |
1226 | { | |
1227 | struct sit_info *sit_i = SIT_I(sbi); | |
1228 | unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno); | |
1229 | block_t blk_addr = sit_i->sit_base_addr + offset; | |
1230 | ||
1231 | check_seg_range(sbi, segno); | |
1232 | ||
1233 | /* calculate sit block address */ | |
1234 | if (f2fs_test_bit(offset, sit_i->sit_bitmap)) | |
1235 | blk_addr += sit_i->sit_blocks; | |
1236 | ||
1237 | return get_meta_page(sbi, blk_addr); | |
1238 | } | |
1239 | ||
1240 | static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, | |
1241 | unsigned int start) | |
1242 | { | |
1243 | struct sit_info *sit_i = SIT_I(sbi); | |
1244 | struct page *src_page, *dst_page; | |
1245 | pgoff_t src_off, dst_off; | |
1246 | void *src_addr, *dst_addr; | |
1247 | ||
1248 | src_off = current_sit_addr(sbi, start); | |
1249 | dst_off = next_sit_addr(sbi, src_off); | |
1250 | ||
1251 | /* get current sit block page without lock */ | |
1252 | src_page = get_meta_page(sbi, src_off); | |
1253 | dst_page = grab_meta_page(sbi, dst_off); | |
1254 | BUG_ON(PageDirty(src_page)); | |
1255 | ||
1256 | src_addr = page_address(src_page); | |
1257 | dst_addr = page_address(dst_page); | |
1258 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
1259 | ||
1260 | set_page_dirty(dst_page); | |
1261 | f2fs_put_page(src_page, 1); | |
1262 | ||
1263 | set_to_next_sit(sit_i, start); | |
1264 | ||
1265 | return dst_page; | |
1266 | } | |
1267 | ||
1268 | static bool flush_sits_in_journal(struct f2fs_sb_info *sbi) | |
1269 | { | |
1270 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1271 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1272 | int i; | |
1273 | ||
1274 | /* | |
1275 | * If the journal area in the current summary is full of sit entries, | |
1276 | * all the sit entries will be flushed. Otherwise the sit entries | |
1277 | * are not able to replace with newly hot sit entries. | |
1278 | */ | |
1279 | if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) { | |
1280 | for (i = sits_in_cursum(sum) - 1; i >= 0; i--) { | |
1281 | unsigned int segno; | |
1282 | segno = le32_to_cpu(segno_in_journal(sum, i)); | |
1283 | __mark_sit_entry_dirty(sbi, segno); | |
1284 | } | |
1285 | update_sits_in_cursum(sum, -sits_in_cursum(sum)); | |
1286 | return 1; | |
1287 | } | |
1288 | return 0; | |
1289 | } | |
1290 | ||
0a8165d7 | 1291 | /* |
351df4b2 JK |
1292 | * CP calls this function, which flushes SIT entries including sit_journal, |
1293 | * and moves prefree segs to free segs. | |
1294 | */ | |
1295 | void flush_sit_entries(struct f2fs_sb_info *sbi) | |
1296 | { | |
1297 | struct sit_info *sit_i = SIT_I(sbi); | |
1298 | unsigned long *bitmap = sit_i->dirty_sentries_bitmap; | |
1299 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1300 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1301 | unsigned long nsegs = TOTAL_SEGS(sbi); | |
1302 | struct page *page = NULL; | |
1303 | struct f2fs_sit_block *raw_sit = NULL; | |
1304 | unsigned int start = 0, end = 0; | |
1305 | unsigned int segno = -1; | |
1306 | bool flushed; | |
1307 | ||
1308 | mutex_lock(&curseg->curseg_mutex); | |
1309 | mutex_lock(&sit_i->sentry_lock); | |
1310 | ||
1311 | /* | |
1312 | * "flushed" indicates whether sit entries in journal are flushed | |
1313 | * to the SIT area or not. | |
1314 | */ | |
1315 | flushed = flush_sits_in_journal(sbi); | |
1316 | ||
1317 | while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) { | |
1318 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
1319 | int sit_offset, offset; | |
1320 | ||
1321 | sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); | |
1322 | ||
1323 | if (flushed) | |
1324 | goto to_sit_page; | |
1325 | ||
1326 | offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1); | |
1327 | if (offset >= 0) { | |
1328 | segno_in_journal(sum, offset) = cpu_to_le32(segno); | |
1329 | seg_info_to_raw_sit(se, &sit_in_journal(sum, offset)); | |
1330 | goto flush_done; | |
1331 | } | |
1332 | to_sit_page: | |
1333 | if (!page || (start > segno) || (segno > end)) { | |
1334 | if (page) { | |
1335 | f2fs_put_page(page, 1); | |
1336 | page = NULL; | |
1337 | } | |
1338 | ||
1339 | start = START_SEGNO(sit_i, segno); | |
1340 | end = start + SIT_ENTRY_PER_BLOCK - 1; | |
1341 | ||
1342 | /* read sit block that will be updated */ | |
1343 | page = get_next_sit_page(sbi, start); | |
1344 | raw_sit = page_address(page); | |
1345 | } | |
1346 | ||
1347 | /* udpate entry in SIT block */ | |
1348 | seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]); | |
1349 | flush_done: | |
1350 | __clear_bit(segno, bitmap); | |
1351 | sit_i->dirty_sentries--; | |
1352 | } | |
1353 | mutex_unlock(&sit_i->sentry_lock); | |
1354 | mutex_unlock(&curseg->curseg_mutex); | |
1355 | ||
1356 | /* writeout last modified SIT block */ | |
1357 | f2fs_put_page(page, 1); | |
1358 | ||
1359 | set_prefree_as_free_segments(sbi); | |
1360 | } | |
1361 | ||
1362 | static int build_sit_info(struct f2fs_sb_info *sbi) | |
1363 | { | |
1364 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
1365 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1366 | struct sit_info *sit_i; | |
1367 | unsigned int sit_segs, start; | |
1368 | char *src_bitmap, *dst_bitmap; | |
1369 | unsigned int bitmap_size; | |
1370 | ||
1371 | /* allocate memory for SIT information */ | |
1372 | sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL); | |
1373 | if (!sit_i) | |
1374 | return -ENOMEM; | |
1375 | ||
1376 | SM_I(sbi)->sit_info = sit_i; | |
1377 | ||
1378 | sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry)); | |
1379 | if (!sit_i->sentries) | |
1380 | return -ENOMEM; | |
1381 | ||
1382 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1383 | sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL); | |
1384 | if (!sit_i->dirty_sentries_bitmap) | |
1385 | return -ENOMEM; | |
1386 | ||
1387 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1388 | sit_i->sentries[start].cur_valid_map | |
1389 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1390 | sit_i->sentries[start].ckpt_valid_map | |
1391 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1392 | if (!sit_i->sentries[start].cur_valid_map | |
1393 | || !sit_i->sentries[start].ckpt_valid_map) | |
1394 | return -ENOMEM; | |
1395 | } | |
1396 | ||
1397 | if (sbi->segs_per_sec > 1) { | |
53cf9522 | 1398 | sit_i->sec_entries = vzalloc(TOTAL_SECS(sbi) * |
351df4b2 JK |
1399 | sizeof(struct sec_entry)); |
1400 | if (!sit_i->sec_entries) | |
1401 | return -ENOMEM; | |
1402 | } | |
1403 | ||
1404 | /* get information related with SIT */ | |
1405 | sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; | |
1406 | ||
1407 | /* setup SIT bitmap from ckeckpoint pack */ | |
1408 | bitmap_size = __bitmap_size(sbi, SIT_BITMAP); | |
1409 | src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); | |
1410 | ||
79b5793b | 1411 | dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); |
351df4b2 JK |
1412 | if (!dst_bitmap) |
1413 | return -ENOMEM; | |
351df4b2 JK |
1414 | |
1415 | /* init SIT information */ | |
1416 | sit_i->s_ops = &default_salloc_ops; | |
1417 | ||
1418 | sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); | |
1419 | sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; | |
1420 | sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count); | |
1421 | sit_i->sit_bitmap = dst_bitmap; | |
1422 | sit_i->bitmap_size = bitmap_size; | |
1423 | sit_i->dirty_sentries = 0; | |
1424 | sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; | |
1425 | sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); | |
1426 | sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec; | |
1427 | mutex_init(&sit_i->sentry_lock); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | static int build_free_segmap(struct f2fs_sb_info *sbi) | |
1432 | { | |
1433 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
1434 | struct free_segmap_info *free_i; | |
1435 | unsigned int bitmap_size, sec_bitmap_size; | |
1436 | ||
1437 | /* allocate memory for free segmap information */ | |
1438 | free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL); | |
1439 | if (!free_i) | |
1440 | return -ENOMEM; | |
1441 | ||
1442 | SM_I(sbi)->free_info = free_i; | |
1443 | ||
1444 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1445 | free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL); | |
1446 | if (!free_i->free_segmap) | |
1447 | return -ENOMEM; | |
1448 | ||
53cf9522 | 1449 | sec_bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); |
351df4b2 JK |
1450 | free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL); |
1451 | if (!free_i->free_secmap) | |
1452 | return -ENOMEM; | |
1453 | ||
1454 | /* set all segments as dirty temporarily */ | |
1455 | memset(free_i->free_segmap, 0xff, bitmap_size); | |
1456 | memset(free_i->free_secmap, 0xff, sec_bitmap_size); | |
1457 | ||
1458 | /* init free segmap information */ | |
1459 | free_i->start_segno = | |
1460 | (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr); | |
1461 | free_i->free_segments = 0; | |
1462 | free_i->free_sections = 0; | |
1463 | rwlock_init(&free_i->segmap_lock); | |
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | static int build_curseg(struct f2fs_sb_info *sbi) | |
1468 | { | |
1042d60f | 1469 | struct curseg_info *array; |
351df4b2 JK |
1470 | int i; |
1471 | ||
1472 | array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL); | |
1473 | if (!array) | |
1474 | return -ENOMEM; | |
1475 | ||
1476 | SM_I(sbi)->curseg_array = array; | |
1477 | ||
1478 | for (i = 0; i < NR_CURSEG_TYPE; i++) { | |
1479 | mutex_init(&array[i].curseg_mutex); | |
1480 | array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); | |
1481 | if (!array[i].sum_blk) | |
1482 | return -ENOMEM; | |
1483 | array[i].segno = NULL_SEGNO; | |
1484 | array[i].next_blkoff = 0; | |
1485 | } | |
1486 | return restore_curseg_summaries(sbi); | |
1487 | } | |
1488 | ||
1489 | static void build_sit_entries(struct f2fs_sb_info *sbi) | |
1490 | { | |
1491 | struct sit_info *sit_i = SIT_I(sbi); | |
1492 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1493 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1494 | unsigned int start; | |
1495 | ||
1496 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1497 | struct seg_entry *se = &sit_i->sentries[start]; | |
1498 | struct f2fs_sit_block *sit_blk; | |
1499 | struct f2fs_sit_entry sit; | |
1500 | struct page *page; | |
1501 | int i; | |
1502 | ||
1503 | mutex_lock(&curseg->curseg_mutex); | |
1504 | for (i = 0; i < sits_in_cursum(sum); i++) { | |
1505 | if (le32_to_cpu(segno_in_journal(sum, i)) == start) { | |
1506 | sit = sit_in_journal(sum, i); | |
1507 | mutex_unlock(&curseg->curseg_mutex); | |
1508 | goto got_it; | |
1509 | } | |
1510 | } | |
1511 | mutex_unlock(&curseg->curseg_mutex); | |
1512 | page = get_current_sit_page(sbi, start); | |
1513 | sit_blk = (struct f2fs_sit_block *)page_address(page); | |
1514 | sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; | |
1515 | f2fs_put_page(page, 1); | |
1516 | got_it: | |
1517 | check_block_count(sbi, start, &sit); | |
1518 | seg_info_from_raw_sit(se, &sit); | |
1519 | if (sbi->segs_per_sec > 1) { | |
1520 | struct sec_entry *e = get_sec_entry(sbi, start); | |
1521 | e->valid_blocks += se->valid_blocks; | |
1522 | } | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | static void init_free_segmap(struct f2fs_sb_info *sbi) | |
1527 | { | |
1528 | unsigned int start; | |
1529 | int type; | |
1530 | ||
1531 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1532 | struct seg_entry *sentry = get_seg_entry(sbi, start); | |
1533 | if (!sentry->valid_blocks) | |
1534 | __set_free(sbi, start); | |
1535 | } | |
1536 | ||
1537 | /* set use the current segments */ | |
1538 | for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { | |
1539 | struct curseg_info *curseg_t = CURSEG_I(sbi, type); | |
1540 | __set_test_and_inuse(sbi, curseg_t->segno); | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | static void init_dirty_segmap(struct f2fs_sb_info *sbi) | |
1545 | { | |
1546 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1547 | struct free_segmap_info *free_i = FREE_I(sbi); | |
1548 | unsigned int segno = 0, offset = 0; | |
1549 | unsigned short valid_blocks; | |
1550 | ||
1551 | while (segno < TOTAL_SEGS(sbi)) { | |
1552 | /* find dirty segment based on free segmap */ | |
1553 | segno = find_next_inuse(free_i, TOTAL_SEGS(sbi), offset); | |
1554 | if (segno >= TOTAL_SEGS(sbi)) | |
1555 | break; | |
1556 | offset = segno + 1; | |
1557 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
1558 | if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks) | |
1559 | continue; | |
1560 | mutex_lock(&dirty_i->seglist_lock); | |
1561 | __locate_dirty_segment(sbi, segno, DIRTY); | |
1562 | mutex_unlock(&dirty_i->seglist_lock); | |
1563 | } | |
1564 | } | |
1565 | ||
5ec4e49f | 1566 | static int init_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
1567 | { |
1568 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 1569 | unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); |
351df4b2 | 1570 | |
5ec4e49f JK |
1571 | dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL); |
1572 | if (!dirty_i->victim_secmap) | |
351df4b2 JK |
1573 | return -ENOMEM; |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | static int build_dirty_segmap(struct f2fs_sb_info *sbi) | |
1578 | { | |
1579 | struct dirty_seglist_info *dirty_i; | |
1580 | unsigned int bitmap_size, i; | |
1581 | ||
1582 | /* allocate memory for dirty segments list information */ | |
1583 | dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL); | |
1584 | if (!dirty_i) | |
1585 | return -ENOMEM; | |
1586 | ||
1587 | SM_I(sbi)->dirty_info = dirty_i; | |
1588 | mutex_init(&dirty_i->seglist_lock); | |
1589 | ||
1590 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1591 | ||
1592 | for (i = 0; i < NR_DIRTY_TYPE; i++) { | |
1593 | dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL); | |
351df4b2 JK |
1594 | if (!dirty_i->dirty_segmap[i]) |
1595 | return -ENOMEM; | |
1596 | } | |
1597 | ||
1598 | init_dirty_segmap(sbi); | |
5ec4e49f | 1599 | return init_victim_secmap(sbi); |
351df4b2 JK |
1600 | } |
1601 | ||
0a8165d7 | 1602 | /* |
351df4b2 JK |
1603 | * Update min, max modified time for cost-benefit GC algorithm |
1604 | */ | |
1605 | static void init_min_max_mtime(struct f2fs_sb_info *sbi) | |
1606 | { | |
1607 | struct sit_info *sit_i = SIT_I(sbi); | |
1608 | unsigned int segno; | |
1609 | ||
1610 | mutex_lock(&sit_i->sentry_lock); | |
1611 | ||
1612 | sit_i->min_mtime = LLONG_MAX; | |
1613 | ||
1614 | for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { | |
1615 | unsigned int i; | |
1616 | unsigned long long mtime = 0; | |
1617 | ||
1618 | for (i = 0; i < sbi->segs_per_sec; i++) | |
1619 | mtime += get_seg_entry(sbi, segno + i)->mtime; | |
1620 | ||
1621 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
1622 | ||
1623 | if (sit_i->min_mtime > mtime) | |
1624 | sit_i->min_mtime = mtime; | |
1625 | } | |
1626 | sit_i->max_mtime = get_mtime(sbi); | |
1627 | mutex_unlock(&sit_i->sentry_lock); | |
1628 | } | |
1629 | ||
1630 | int build_segment_manager(struct f2fs_sb_info *sbi) | |
1631 | { | |
1632 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
1633 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1042d60f | 1634 | struct f2fs_sm_info *sm_info; |
351df4b2 JK |
1635 | int err; |
1636 | ||
1637 | sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL); | |
1638 | if (!sm_info) | |
1639 | return -ENOMEM; | |
1640 | ||
1641 | /* init sm info */ | |
1642 | sbi->sm_info = sm_info; | |
1643 | INIT_LIST_HEAD(&sm_info->wblist_head); | |
1644 | spin_lock_init(&sm_info->wblist_lock); | |
1645 | sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); | |
1646 | sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
1647 | sm_info->segment_count = le32_to_cpu(raw_super->segment_count); | |
1648 | sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); | |
1649 | sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); | |
1650 | sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); | |
1651 | sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
1652 | ||
1653 | err = build_sit_info(sbi); | |
1654 | if (err) | |
1655 | return err; | |
1656 | err = build_free_segmap(sbi); | |
1657 | if (err) | |
1658 | return err; | |
1659 | err = build_curseg(sbi); | |
1660 | if (err) | |
1661 | return err; | |
1662 | ||
1663 | /* reinit free segmap based on SIT */ | |
1664 | build_sit_entries(sbi); | |
1665 | ||
1666 | init_free_segmap(sbi); | |
1667 | err = build_dirty_segmap(sbi); | |
1668 | if (err) | |
1669 | return err; | |
1670 | ||
1671 | init_min_max_mtime(sbi); | |
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | static void discard_dirty_segmap(struct f2fs_sb_info *sbi, | |
1676 | enum dirty_type dirty_type) | |
1677 | { | |
1678 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1679 | ||
1680 | mutex_lock(&dirty_i->seglist_lock); | |
1681 | kfree(dirty_i->dirty_segmap[dirty_type]); | |
1682 | dirty_i->nr_dirty[dirty_type] = 0; | |
1683 | mutex_unlock(&dirty_i->seglist_lock); | |
1684 | } | |
1685 | ||
5ec4e49f | 1686 | static void destroy_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
1687 | { |
1688 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 1689 | kfree(dirty_i->victim_secmap); |
351df4b2 JK |
1690 | } |
1691 | ||
1692 | static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) | |
1693 | { | |
1694 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1695 | int i; | |
1696 | ||
1697 | if (!dirty_i) | |
1698 | return; | |
1699 | ||
1700 | /* discard pre-free/dirty segments list */ | |
1701 | for (i = 0; i < NR_DIRTY_TYPE; i++) | |
1702 | discard_dirty_segmap(sbi, i); | |
1703 | ||
5ec4e49f | 1704 | destroy_victim_secmap(sbi); |
351df4b2 JK |
1705 | SM_I(sbi)->dirty_info = NULL; |
1706 | kfree(dirty_i); | |
1707 | } | |
1708 | ||
1709 | static void destroy_curseg(struct f2fs_sb_info *sbi) | |
1710 | { | |
1711 | struct curseg_info *array = SM_I(sbi)->curseg_array; | |
1712 | int i; | |
1713 | ||
1714 | if (!array) | |
1715 | return; | |
1716 | SM_I(sbi)->curseg_array = NULL; | |
1717 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
1718 | kfree(array[i].sum_blk); | |
1719 | kfree(array); | |
1720 | } | |
1721 | ||
1722 | static void destroy_free_segmap(struct f2fs_sb_info *sbi) | |
1723 | { | |
1724 | struct free_segmap_info *free_i = SM_I(sbi)->free_info; | |
1725 | if (!free_i) | |
1726 | return; | |
1727 | SM_I(sbi)->free_info = NULL; | |
1728 | kfree(free_i->free_segmap); | |
1729 | kfree(free_i->free_secmap); | |
1730 | kfree(free_i); | |
1731 | } | |
1732 | ||
1733 | static void destroy_sit_info(struct f2fs_sb_info *sbi) | |
1734 | { | |
1735 | struct sit_info *sit_i = SIT_I(sbi); | |
1736 | unsigned int start; | |
1737 | ||
1738 | if (!sit_i) | |
1739 | return; | |
1740 | ||
1741 | if (sit_i->sentries) { | |
1742 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1743 | kfree(sit_i->sentries[start].cur_valid_map); | |
1744 | kfree(sit_i->sentries[start].ckpt_valid_map); | |
1745 | } | |
1746 | } | |
1747 | vfree(sit_i->sentries); | |
1748 | vfree(sit_i->sec_entries); | |
1749 | kfree(sit_i->dirty_sentries_bitmap); | |
1750 | ||
1751 | SM_I(sbi)->sit_info = NULL; | |
1752 | kfree(sit_i->sit_bitmap); | |
1753 | kfree(sit_i); | |
1754 | } | |
1755 | ||
1756 | void destroy_segment_manager(struct f2fs_sb_info *sbi) | |
1757 | { | |
1758 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
1759 | destroy_dirty_segmap(sbi); | |
1760 | destroy_curseg(sbi); | |
1761 | destroy_free_segmap(sbi); | |
1762 | destroy_sit_info(sbi); | |
1763 | sbi->sm_info = NULL; | |
1764 | kfree(sm_info); | |
1765 | } |