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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" | |
6ec178da | 21 | #include <trace/events/f2fs.h> |
351df4b2 | 22 | |
0a8165d7 | 23 | /* |
351df4b2 JK |
24 | * This function balances dirty node and dentry pages. |
25 | * In addition, it controls garbage collection. | |
26 | */ | |
27 | void f2fs_balance_fs(struct f2fs_sb_info *sbi) | |
28 | { | |
351df4b2 | 29 | /* |
029cd28c JK |
30 | * We should do GC or end up with checkpoint, if there are so many dirty |
31 | * dir/node pages without enough free segments. | |
351df4b2 | 32 | */ |
43727527 | 33 | if (has_not_enough_free_secs(sbi, 0)) { |
351df4b2 | 34 | mutex_lock(&sbi->gc_mutex); |
408e9375 | 35 | f2fs_gc(sbi); |
351df4b2 JK |
36 | } |
37 | } | |
38 | ||
39 | static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
40 | enum dirty_type dirty_type) | |
41 | { | |
42 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
43 | ||
44 | /* need not be added */ | |
45 | if (IS_CURSEG(sbi, segno)) | |
46 | return; | |
47 | ||
48 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
49 | dirty_i->nr_dirty[dirty_type]++; | |
50 | ||
51 | if (dirty_type == DIRTY) { | |
52 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
b2f2c390 JK |
53 | enum dirty_type t = DIRTY_HOT_DATA; |
54 | ||
351df4b2 | 55 | dirty_type = sentry->type; |
b2f2c390 | 56 | |
351df4b2 JK |
57 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) |
58 | dirty_i->nr_dirty[dirty_type]++; | |
b2f2c390 JK |
59 | |
60 | /* Only one bitmap should be set */ | |
61 | for (; t <= DIRTY_COLD_NODE; t++) { | |
62 | if (t == dirty_type) | |
63 | continue; | |
64 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) | |
65 | dirty_i->nr_dirty[t]--; | |
66 | } | |
351df4b2 JK |
67 | } |
68 | } | |
69 | ||
70 | static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
71 | enum dirty_type dirty_type) | |
72 | { | |
73 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
74 | ||
75 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
76 | dirty_i->nr_dirty[dirty_type]--; | |
77 | ||
78 | if (dirty_type == DIRTY) { | |
b2f2c390 JK |
79 | enum dirty_type t = DIRTY_HOT_DATA; |
80 | ||
81 | /* clear all the bitmaps */ | |
82 | for (; t <= DIRTY_COLD_NODE; t++) | |
83 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) | |
84 | dirty_i->nr_dirty[t]--; | |
85 | ||
5ec4e49f JK |
86 | if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0) |
87 | clear_bit(GET_SECNO(sbi, segno), | |
88 | dirty_i->victim_secmap); | |
351df4b2 JK |
89 | } |
90 | } | |
91 | ||
0a8165d7 | 92 | /* |
351df4b2 JK |
93 | * Should not occur error such as -ENOMEM. |
94 | * Adding dirty entry into seglist is not critical operation. | |
95 | * If a given segment is one of current working segments, it won't be added. | |
96 | */ | |
97 | void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) | |
98 | { | |
99 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
100 | unsigned short valid_blocks; | |
101 | ||
102 | if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) | |
103 | return; | |
104 | ||
105 | mutex_lock(&dirty_i->seglist_lock); | |
106 | ||
107 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
108 | ||
109 | if (valid_blocks == 0) { | |
110 | __locate_dirty_segment(sbi, segno, PRE); | |
111 | __remove_dirty_segment(sbi, segno, DIRTY); | |
112 | } else if (valid_blocks < sbi->blocks_per_seg) { | |
113 | __locate_dirty_segment(sbi, segno, DIRTY); | |
114 | } else { | |
115 | /* Recovery routine with SSR needs this */ | |
116 | __remove_dirty_segment(sbi, segno, DIRTY); | |
117 | } | |
118 | ||
119 | mutex_unlock(&dirty_i->seglist_lock); | |
120 | return; | |
121 | } | |
122 | ||
0a8165d7 | 123 | /* |
351df4b2 JK |
124 | * Should call clear_prefree_segments after checkpoint is done. |
125 | */ | |
126 | static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) | |
127 | { | |
128 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
129 | unsigned int segno, offset = 0; | |
130 | unsigned int total_segs = TOTAL_SEGS(sbi); | |
131 | ||
132 | mutex_lock(&dirty_i->seglist_lock); | |
133 | while (1) { | |
134 | segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, | |
135 | offset); | |
136 | if (segno >= total_segs) | |
137 | break; | |
138 | __set_test_and_free(sbi, segno); | |
139 | offset = segno + 1; | |
140 | } | |
141 | mutex_unlock(&dirty_i->seglist_lock); | |
142 | } | |
143 | ||
144 | void clear_prefree_segments(struct f2fs_sb_info *sbi) | |
145 | { | |
146 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
147 | unsigned int segno, offset = 0; | |
148 | unsigned int total_segs = TOTAL_SEGS(sbi); | |
149 | ||
150 | mutex_lock(&dirty_i->seglist_lock); | |
151 | while (1) { | |
152 | segno = find_next_bit(dirty_i->dirty_segmap[PRE], total_segs, | |
153 | offset); | |
154 | if (segno >= total_segs) | |
155 | break; | |
156 | ||
157 | offset = segno + 1; | |
158 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[PRE])) | |
159 | dirty_i->nr_dirty[PRE]--; | |
160 | ||
161 | /* Let's use trim */ | |
162 | if (test_opt(sbi, DISCARD)) | |
163 | blkdev_issue_discard(sbi->sb->s_bdev, | |
164 | START_BLOCK(sbi, segno) << | |
165 | sbi->log_sectors_per_block, | |
166 | 1 << (sbi->log_sectors_per_block + | |
167 | sbi->log_blocks_per_seg), | |
168 | GFP_NOFS, 0); | |
169 | } | |
170 | mutex_unlock(&dirty_i->seglist_lock); | |
171 | } | |
172 | ||
173 | static void __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) | |
174 | { | |
175 | struct sit_info *sit_i = SIT_I(sbi); | |
176 | if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) | |
177 | sit_i->dirty_sentries++; | |
178 | } | |
179 | ||
180 | static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, | |
181 | unsigned int segno, int modified) | |
182 | { | |
183 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
184 | se->type = type; | |
185 | if (modified) | |
186 | __mark_sit_entry_dirty(sbi, segno); | |
187 | } | |
188 | ||
189 | static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) | |
190 | { | |
191 | struct seg_entry *se; | |
192 | unsigned int segno, offset; | |
193 | long int new_vblocks; | |
194 | ||
195 | segno = GET_SEGNO(sbi, blkaddr); | |
196 | ||
197 | se = get_seg_entry(sbi, segno); | |
198 | new_vblocks = se->valid_blocks + del; | |
199 | offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1); | |
200 | ||
201 | BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) || | |
202 | (new_vblocks > sbi->blocks_per_seg))); | |
203 | ||
204 | se->valid_blocks = new_vblocks; | |
205 | se->mtime = get_mtime(sbi); | |
206 | SIT_I(sbi)->max_mtime = se->mtime; | |
207 | ||
208 | /* Update valid block bitmap */ | |
209 | if (del > 0) { | |
210 | if (f2fs_set_bit(offset, se->cur_valid_map)) | |
211 | BUG(); | |
212 | } else { | |
213 | if (!f2fs_clear_bit(offset, se->cur_valid_map)) | |
214 | BUG(); | |
215 | } | |
216 | if (!f2fs_test_bit(offset, se->ckpt_valid_map)) | |
217 | se->ckpt_valid_blocks += del; | |
218 | ||
219 | __mark_sit_entry_dirty(sbi, segno); | |
220 | ||
221 | /* update total number of valid blocks to be written in ckpt area */ | |
222 | SIT_I(sbi)->written_valid_blocks += del; | |
223 | ||
224 | if (sbi->segs_per_sec > 1) | |
225 | get_sec_entry(sbi, segno)->valid_blocks += del; | |
226 | } | |
227 | ||
228 | static void refresh_sit_entry(struct f2fs_sb_info *sbi, | |
229 | block_t old_blkaddr, block_t new_blkaddr) | |
230 | { | |
231 | update_sit_entry(sbi, new_blkaddr, 1); | |
232 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) | |
233 | update_sit_entry(sbi, old_blkaddr, -1); | |
234 | } | |
235 | ||
236 | void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) | |
237 | { | |
238 | unsigned int segno = GET_SEGNO(sbi, addr); | |
239 | struct sit_info *sit_i = SIT_I(sbi); | |
240 | ||
241 | BUG_ON(addr == NULL_ADDR); | |
242 | if (addr == NEW_ADDR) | |
243 | return; | |
244 | ||
245 | /* add it into sit main buffer */ | |
246 | mutex_lock(&sit_i->sentry_lock); | |
247 | ||
248 | update_sit_entry(sbi, addr, -1); | |
249 | ||
250 | /* add it into dirty seglist */ | |
251 | locate_dirty_segment(sbi, segno); | |
252 | ||
253 | mutex_unlock(&sit_i->sentry_lock); | |
254 | } | |
255 | ||
0a8165d7 | 256 | /* |
351df4b2 JK |
257 | * This function should be resided under the curseg_mutex lock |
258 | */ | |
259 | static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, | |
260 | struct f2fs_summary *sum, unsigned short offset) | |
261 | { | |
262 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
263 | void *addr = curseg->sum_blk; | |
264 | addr += offset * sizeof(struct f2fs_summary); | |
265 | memcpy(addr, sum, sizeof(struct f2fs_summary)); | |
266 | return; | |
267 | } | |
268 | ||
0a8165d7 | 269 | /* |
351df4b2 JK |
270 | * Calculate the number of current summary pages for writing |
271 | */ | |
272 | int npages_for_summary_flush(struct f2fs_sb_info *sbi) | |
273 | { | |
274 | int total_size_bytes = 0; | |
275 | int valid_sum_count = 0; | |
276 | int i, sum_space; | |
277 | ||
278 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
279 | if (sbi->ckpt->alloc_type[i] == SSR) | |
280 | valid_sum_count += sbi->blocks_per_seg; | |
281 | else | |
282 | valid_sum_count += curseg_blkoff(sbi, i); | |
283 | } | |
284 | ||
285 | total_size_bytes = valid_sum_count * (SUMMARY_SIZE + 1) | |
286 | + sizeof(struct nat_journal) + 2 | |
287 | + sizeof(struct sit_journal) + 2; | |
288 | sum_space = PAGE_CACHE_SIZE - SUM_FOOTER_SIZE; | |
289 | if (total_size_bytes < sum_space) | |
290 | return 1; | |
291 | else if (total_size_bytes < 2 * sum_space) | |
292 | return 2; | |
293 | return 3; | |
294 | } | |
295 | ||
0a8165d7 | 296 | /* |
351df4b2 JK |
297 | * Caller should put this summary page |
298 | */ | |
299 | struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) | |
300 | { | |
301 | return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); | |
302 | } | |
303 | ||
304 | static void write_sum_page(struct f2fs_sb_info *sbi, | |
305 | struct f2fs_summary_block *sum_blk, block_t blk_addr) | |
306 | { | |
307 | struct page *page = grab_meta_page(sbi, blk_addr); | |
308 | void *kaddr = page_address(page); | |
309 | memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE); | |
310 | set_page_dirty(page); | |
311 | f2fs_put_page(page, 1); | |
312 | } | |
313 | ||
5ec4e49f | 314 | static unsigned int check_prefree_segments(struct f2fs_sb_info *sbi, int type) |
351df4b2 JK |
315 | { |
316 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
317 | unsigned long *prefree_segmap = dirty_i->dirty_segmap[PRE]; | |
5ec4e49f JK |
318 | unsigned int segno; |
319 | unsigned int ofs = 0; | |
351df4b2 JK |
320 | |
321 | /* | |
322 | * If there is not enough reserved sections, | |
323 | * we should not reuse prefree segments. | |
324 | */ | |
43727527 | 325 | if (has_not_enough_free_secs(sbi, 0)) |
351df4b2 JK |
326 | return NULL_SEGNO; |
327 | ||
328 | /* | |
329 | * NODE page should not reuse prefree segment, | |
330 | * since those information is used for SPOR. | |
331 | */ | |
332 | if (IS_NODESEG(type)) | |
333 | return NULL_SEGNO; | |
334 | next: | |
5ec4e49f JK |
335 | segno = find_next_bit(prefree_segmap, TOTAL_SEGS(sbi), ofs); |
336 | ofs += sbi->segs_per_sec; | |
337 | ||
351df4b2 | 338 | if (segno < TOTAL_SEGS(sbi)) { |
5ec4e49f JK |
339 | int i; |
340 | ||
351df4b2 | 341 | /* skip intermediate segments in a section */ |
5ec4e49f | 342 | if (segno % sbi->segs_per_sec) |
351df4b2 JK |
343 | goto next; |
344 | ||
5ec4e49f JK |
345 | /* skip if the section is currently used */ |
346 | if (sec_usage_check(sbi, GET_SECNO(sbi, segno))) | |
351df4b2 JK |
347 | goto next; |
348 | ||
5ec4e49f JK |
349 | /* skip if whole section is not prefree */ |
350 | for (i = 1; i < sbi->segs_per_sec; i++) | |
351 | if (!test_bit(segno + i, prefree_segmap)) | |
352 | goto next; | |
353 | ||
351df4b2 | 354 | /* skip if whole section was not free at the last checkpoint */ |
5ec4e49f JK |
355 | for (i = 0; i < sbi->segs_per_sec; i++) |
356 | if (get_seg_entry(sbi, segno + i)->ckpt_valid_blocks) | |
351df4b2 | 357 | goto next; |
5ec4e49f | 358 | |
351df4b2 JK |
359 | return segno; |
360 | } | |
361 | return NULL_SEGNO; | |
362 | } | |
363 | ||
60374688 JK |
364 | static int is_next_segment_free(struct f2fs_sb_info *sbi, int type) |
365 | { | |
366 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
367 | unsigned int segno = curseg->segno; | |
368 | struct free_segmap_info *free_i = FREE_I(sbi); | |
369 | ||
370 | if (segno + 1 < TOTAL_SEGS(sbi) && (segno + 1) % sbi->segs_per_sec) | |
371 | return !test_bit(segno + 1, free_i->free_segmap); | |
372 | return 0; | |
373 | } | |
374 | ||
0a8165d7 | 375 | /* |
351df4b2 JK |
376 | * Find a new segment from the free segments bitmap to right order |
377 | * This function should be returned with success, otherwise BUG | |
378 | */ | |
379 | static void get_new_segment(struct f2fs_sb_info *sbi, | |
380 | unsigned int *newseg, bool new_sec, int dir) | |
381 | { | |
382 | struct free_segmap_info *free_i = FREE_I(sbi); | |
351df4b2 | 383 | unsigned int segno, secno, zoneno; |
53cf9522 | 384 | unsigned int total_zones = TOTAL_SECS(sbi) / sbi->secs_per_zone; |
351df4b2 JK |
385 | unsigned int hint = *newseg / sbi->segs_per_sec; |
386 | unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg); | |
387 | unsigned int left_start = hint; | |
388 | bool init = true; | |
389 | int go_left = 0; | |
390 | int i; | |
391 | ||
392 | write_lock(&free_i->segmap_lock); | |
393 | ||
394 | if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { | |
395 | segno = find_next_zero_bit(free_i->free_segmap, | |
396 | TOTAL_SEGS(sbi), *newseg + 1); | |
33afa7fd JK |
397 | if (segno - *newseg < sbi->segs_per_sec - |
398 | (*newseg % sbi->segs_per_sec)) | |
351df4b2 JK |
399 | goto got_it; |
400 | } | |
401 | find_other_zone: | |
53cf9522 JK |
402 | secno = find_next_zero_bit(free_i->free_secmap, TOTAL_SECS(sbi), hint); |
403 | if (secno >= TOTAL_SECS(sbi)) { | |
351df4b2 JK |
404 | if (dir == ALLOC_RIGHT) { |
405 | secno = find_next_zero_bit(free_i->free_secmap, | |
53cf9522 JK |
406 | TOTAL_SECS(sbi), 0); |
407 | BUG_ON(secno >= TOTAL_SECS(sbi)); | |
351df4b2 JK |
408 | } else { |
409 | go_left = 1; | |
410 | left_start = hint - 1; | |
411 | } | |
412 | } | |
413 | if (go_left == 0) | |
414 | goto skip_left; | |
415 | ||
416 | while (test_bit(left_start, free_i->free_secmap)) { | |
417 | if (left_start > 0) { | |
418 | left_start--; | |
419 | continue; | |
420 | } | |
421 | left_start = find_next_zero_bit(free_i->free_secmap, | |
53cf9522 JK |
422 | TOTAL_SECS(sbi), 0); |
423 | BUG_ON(left_start >= TOTAL_SECS(sbi)); | |
351df4b2 JK |
424 | break; |
425 | } | |
426 | secno = left_start; | |
427 | skip_left: | |
428 | hint = secno; | |
429 | segno = secno * sbi->segs_per_sec; | |
430 | zoneno = secno / sbi->secs_per_zone; | |
431 | ||
432 | /* give up on finding another zone */ | |
433 | if (!init) | |
434 | goto got_it; | |
435 | if (sbi->secs_per_zone == 1) | |
436 | goto got_it; | |
437 | if (zoneno == old_zoneno) | |
438 | goto got_it; | |
439 | if (dir == ALLOC_LEFT) { | |
440 | if (!go_left && zoneno + 1 >= total_zones) | |
441 | goto got_it; | |
442 | if (go_left && zoneno == 0) | |
443 | goto got_it; | |
444 | } | |
445 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
446 | if (CURSEG_I(sbi, i)->zone == zoneno) | |
447 | break; | |
448 | ||
449 | if (i < NR_CURSEG_TYPE) { | |
450 | /* zone is in user, try another */ | |
451 | if (go_left) | |
452 | hint = zoneno * sbi->secs_per_zone - 1; | |
453 | else if (zoneno + 1 >= total_zones) | |
454 | hint = 0; | |
455 | else | |
456 | hint = (zoneno + 1) * sbi->secs_per_zone; | |
457 | init = false; | |
458 | goto find_other_zone; | |
459 | } | |
460 | got_it: | |
461 | /* set it as dirty segment in free segmap */ | |
462 | BUG_ON(test_bit(segno, free_i->free_segmap)); | |
463 | __set_inuse(sbi, segno); | |
464 | *newseg = segno; | |
465 | write_unlock(&free_i->segmap_lock); | |
466 | } | |
467 | ||
468 | static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) | |
469 | { | |
470 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
471 | struct summary_footer *sum_footer; | |
472 | ||
473 | curseg->segno = curseg->next_segno; | |
474 | curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno); | |
475 | curseg->next_blkoff = 0; | |
476 | curseg->next_segno = NULL_SEGNO; | |
477 | ||
478 | sum_footer = &(curseg->sum_blk->footer); | |
479 | memset(sum_footer, 0, sizeof(struct summary_footer)); | |
480 | if (IS_DATASEG(type)) | |
481 | SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); | |
482 | if (IS_NODESEG(type)) | |
483 | SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); | |
484 | __set_sit_entry_type(sbi, type, curseg->segno, modified); | |
485 | } | |
486 | ||
0a8165d7 | 487 | /* |
351df4b2 JK |
488 | * Allocate a current working segment. |
489 | * This function always allocates a free segment in LFS manner. | |
490 | */ | |
491 | static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) | |
492 | { | |
493 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
494 | unsigned int segno = curseg->segno; | |
495 | int dir = ALLOC_LEFT; | |
496 | ||
497 | write_sum_page(sbi, curseg->sum_blk, | |
498 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
499 | if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) | |
500 | dir = ALLOC_RIGHT; | |
501 | ||
502 | if (test_opt(sbi, NOHEAP)) | |
503 | dir = ALLOC_RIGHT; | |
504 | ||
505 | get_new_segment(sbi, &segno, new_sec, dir); | |
506 | curseg->next_segno = segno; | |
507 | reset_curseg(sbi, type, 1); | |
508 | curseg->alloc_type = LFS; | |
509 | } | |
510 | ||
511 | static void __next_free_blkoff(struct f2fs_sb_info *sbi, | |
512 | struct curseg_info *seg, block_t start) | |
513 | { | |
514 | struct seg_entry *se = get_seg_entry(sbi, seg->segno); | |
515 | block_t ofs; | |
516 | for (ofs = start; ofs < sbi->blocks_per_seg; ofs++) { | |
517 | if (!f2fs_test_bit(ofs, se->ckpt_valid_map) | |
518 | && !f2fs_test_bit(ofs, se->cur_valid_map)) | |
519 | break; | |
520 | } | |
521 | seg->next_blkoff = ofs; | |
522 | } | |
523 | ||
0a8165d7 | 524 | /* |
351df4b2 JK |
525 | * If a segment is written by LFS manner, next block offset is just obtained |
526 | * by increasing the current block offset. However, if a segment is written by | |
527 | * SSR manner, next block offset obtained by calling __next_free_blkoff | |
528 | */ | |
529 | static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, | |
530 | struct curseg_info *seg) | |
531 | { | |
532 | if (seg->alloc_type == SSR) | |
533 | __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); | |
534 | else | |
535 | seg->next_blkoff++; | |
536 | } | |
537 | ||
0a8165d7 | 538 | /* |
351df4b2 JK |
539 | * This function always allocates a used segment (from dirty seglist) by SSR |
540 | * manner, so it should recover the existing segment information of valid blocks | |
541 | */ | |
542 | static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) | |
543 | { | |
544 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
545 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
546 | unsigned int new_segno = curseg->next_segno; | |
547 | struct f2fs_summary_block *sum_node; | |
548 | struct page *sum_page; | |
549 | ||
550 | write_sum_page(sbi, curseg->sum_blk, | |
551 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
552 | __set_test_and_inuse(sbi, new_segno); | |
553 | ||
554 | mutex_lock(&dirty_i->seglist_lock); | |
555 | __remove_dirty_segment(sbi, new_segno, PRE); | |
556 | __remove_dirty_segment(sbi, new_segno, DIRTY); | |
557 | mutex_unlock(&dirty_i->seglist_lock); | |
558 | ||
559 | reset_curseg(sbi, type, 1); | |
560 | curseg->alloc_type = SSR; | |
561 | __next_free_blkoff(sbi, curseg, 0); | |
562 | ||
563 | if (reuse) { | |
564 | sum_page = get_sum_page(sbi, new_segno); | |
565 | sum_node = (struct f2fs_summary_block *)page_address(sum_page); | |
566 | memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); | |
567 | f2fs_put_page(sum_page, 1); | |
568 | } | |
569 | } | |
570 | ||
43727527 JK |
571 | static int get_ssr_segment(struct f2fs_sb_info *sbi, int type) |
572 | { | |
573 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
574 | const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops; | |
575 | ||
576 | if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0)) | |
577 | return v_ops->get_victim(sbi, | |
578 | &(curseg)->next_segno, BG_GC, type, SSR); | |
579 | ||
580 | /* For data segments, let's do SSR more intensively */ | |
581 | for (; type >= CURSEG_HOT_DATA; type--) | |
582 | if (v_ops->get_victim(sbi, &(curseg)->next_segno, | |
583 | BG_GC, type, SSR)) | |
584 | return 1; | |
585 | return 0; | |
586 | } | |
587 | ||
351df4b2 JK |
588 | /* |
589 | * flush out current segment and replace it with new segment | |
590 | * This function should be returned with success, otherwise BUG | |
591 | */ | |
592 | static void allocate_segment_by_default(struct f2fs_sb_info *sbi, | |
593 | int type, bool force) | |
594 | { | |
595 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
351df4b2 JK |
596 | |
597 | if (force) { | |
598 | new_curseg(sbi, type, true); | |
599 | goto out; | |
600 | } | |
601 | ||
5ec4e49f | 602 | curseg->next_segno = check_prefree_segments(sbi, type); |
351df4b2 JK |
603 | |
604 | if (curseg->next_segno != NULL_SEGNO) | |
605 | change_curseg(sbi, type, false); | |
606 | else if (type == CURSEG_WARM_NODE) | |
607 | new_curseg(sbi, type, false); | |
60374688 JK |
608 | else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type)) |
609 | new_curseg(sbi, type, false); | |
351df4b2 JK |
610 | else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) |
611 | change_curseg(sbi, type, true); | |
612 | else | |
613 | new_curseg(sbi, type, false); | |
614 | out: | |
615 | sbi->segment_count[curseg->alloc_type]++; | |
616 | } | |
617 | ||
618 | void allocate_new_segments(struct f2fs_sb_info *sbi) | |
619 | { | |
620 | struct curseg_info *curseg; | |
621 | unsigned int old_curseg; | |
622 | int i; | |
623 | ||
624 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
625 | curseg = CURSEG_I(sbi, i); | |
626 | old_curseg = curseg->segno; | |
627 | SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); | |
628 | locate_dirty_segment(sbi, old_curseg); | |
629 | } | |
630 | } | |
631 | ||
632 | static const struct segment_allocation default_salloc_ops = { | |
633 | .allocate_segment = allocate_segment_by_default, | |
634 | }; | |
635 | ||
636 | static void f2fs_end_io_write(struct bio *bio, int err) | |
637 | { | |
638 | const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); | |
639 | struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; | |
640 | struct bio_private *p = bio->bi_private; | |
641 | ||
642 | do { | |
643 | struct page *page = bvec->bv_page; | |
644 | ||
645 | if (--bvec >= bio->bi_io_vec) | |
646 | prefetchw(&bvec->bv_page->flags); | |
647 | if (!uptodate) { | |
648 | SetPageError(page); | |
649 | if (page->mapping) | |
650 | set_bit(AS_EIO, &page->mapping->flags); | |
25ca923b | 651 | set_ckpt_flags(p->sbi->ckpt, CP_ERROR_FLAG); |
577e3495 | 652 | p->sbi->sb->s_flags |= MS_RDONLY; |
351df4b2 JK |
653 | } |
654 | end_page_writeback(page); | |
655 | dec_page_count(p->sbi, F2FS_WRITEBACK); | |
656 | } while (bvec >= bio->bi_io_vec); | |
657 | ||
658 | if (p->is_sync) | |
659 | complete(p->wait); | |
660 | kfree(p); | |
661 | bio_put(bio); | |
662 | } | |
663 | ||
3cd8a239 | 664 | struct bio *f2fs_bio_alloc(struct block_device *bdev, int npages) |
351df4b2 JK |
665 | { |
666 | struct bio *bio; | |
3cd8a239 | 667 | struct bio_private *priv; |
351df4b2 | 668 | retry: |
3cd8a239 JK |
669 | priv = kmalloc(sizeof(struct bio_private), GFP_NOFS); |
670 | if (!priv) { | |
351df4b2 | 671 | cond_resched(); |
c212991a | 672 | goto retry; |
351df4b2 | 673 | } |
3cd8a239 JK |
674 | |
675 | /* No failure on bio allocation */ | |
676 | bio = bio_alloc(GFP_NOIO, npages); | |
677 | bio->bi_bdev = bdev; | |
678 | bio->bi_private = priv; | |
351df4b2 JK |
679 | return bio; |
680 | } | |
681 | ||
682 | static void do_submit_bio(struct f2fs_sb_info *sbi, | |
683 | enum page_type type, bool sync) | |
684 | { | |
685 | int rw = sync ? WRITE_SYNC : WRITE; | |
686 | enum page_type btype = type > META ? META : type; | |
687 | ||
688 | if (type >= META_FLUSH) | |
689 | rw = WRITE_FLUSH_FUA; | |
690 | ||
8680441c NJ |
691 | if (btype == META) |
692 | rw |= REQ_META; | |
693 | ||
351df4b2 JK |
694 | if (sbi->bio[btype]) { |
695 | struct bio_private *p = sbi->bio[btype]->bi_private; | |
696 | p->sbi = sbi; | |
697 | sbi->bio[btype]->bi_end_io = f2fs_end_io_write; | |
6ec178da NJ |
698 | |
699 | trace_f2fs_do_submit_bio(sbi->sb, btype, sync, sbi->bio[btype]); | |
700 | ||
351df4b2 JK |
701 | if (type == META_FLUSH) { |
702 | DECLARE_COMPLETION_ONSTACK(wait); | |
703 | p->is_sync = true; | |
704 | p->wait = &wait; | |
705 | submit_bio(rw, sbi->bio[btype]); | |
706 | wait_for_completion(&wait); | |
707 | } else { | |
708 | p->is_sync = false; | |
709 | submit_bio(rw, sbi->bio[btype]); | |
710 | } | |
711 | sbi->bio[btype] = NULL; | |
712 | } | |
713 | } | |
714 | ||
715 | void f2fs_submit_bio(struct f2fs_sb_info *sbi, enum page_type type, bool sync) | |
716 | { | |
717 | down_write(&sbi->bio_sem); | |
718 | do_submit_bio(sbi, type, sync); | |
719 | up_write(&sbi->bio_sem); | |
720 | } | |
721 | ||
722 | static void submit_write_page(struct f2fs_sb_info *sbi, struct page *page, | |
723 | block_t blk_addr, enum page_type type) | |
724 | { | |
725 | struct block_device *bdev = sbi->sb->s_bdev; | |
726 | ||
727 | verify_block_addr(sbi, blk_addr); | |
728 | ||
729 | down_write(&sbi->bio_sem); | |
730 | ||
731 | inc_page_count(sbi, F2FS_WRITEBACK); | |
732 | ||
733 | if (sbi->bio[type] && sbi->last_block_in_bio[type] != blk_addr - 1) | |
734 | do_submit_bio(sbi, type, false); | |
735 | alloc_new: | |
3cd8a239 | 736 | if (sbi->bio[type] == NULL) { |
ac5d156c | 737 | sbi->bio[type] = f2fs_bio_alloc(bdev, max_hw_blocks(sbi)); |
3cd8a239 JK |
738 | sbi->bio[type]->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); |
739 | /* | |
740 | * The end_io will be assigned at the sumbission phase. | |
741 | * Until then, let bio_add_page() merge consecutive IOs as much | |
742 | * as possible. | |
743 | */ | |
744 | } | |
351df4b2 JK |
745 | |
746 | if (bio_add_page(sbi->bio[type], page, PAGE_CACHE_SIZE, 0) < | |
747 | PAGE_CACHE_SIZE) { | |
748 | do_submit_bio(sbi, type, false); | |
749 | goto alloc_new; | |
750 | } | |
751 | ||
752 | sbi->last_block_in_bio[type] = blk_addr; | |
753 | ||
754 | up_write(&sbi->bio_sem); | |
6ec178da | 755 | trace_f2fs_submit_write_page(page, blk_addr, type); |
351df4b2 JK |
756 | } |
757 | ||
758 | static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) | |
759 | { | |
760 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
761 | if (curseg->next_blkoff < sbi->blocks_per_seg) | |
762 | return true; | |
763 | return false; | |
764 | } | |
765 | ||
766 | static int __get_segment_type_2(struct page *page, enum page_type p_type) | |
767 | { | |
768 | if (p_type == DATA) | |
769 | return CURSEG_HOT_DATA; | |
770 | else | |
771 | return CURSEG_HOT_NODE; | |
772 | } | |
773 | ||
774 | static int __get_segment_type_4(struct page *page, enum page_type p_type) | |
775 | { | |
776 | if (p_type == DATA) { | |
777 | struct inode *inode = page->mapping->host; | |
778 | ||
779 | if (S_ISDIR(inode->i_mode)) | |
780 | return CURSEG_HOT_DATA; | |
781 | else | |
782 | return CURSEG_COLD_DATA; | |
783 | } else { | |
784 | if (IS_DNODE(page) && !is_cold_node(page)) | |
785 | return CURSEG_HOT_NODE; | |
786 | else | |
787 | return CURSEG_COLD_NODE; | |
788 | } | |
789 | } | |
790 | ||
791 | static int __get_segment_type_6(struct page *page, enum page_type p_type) | |
792 | { | |
793 | if (p_type == DATA) { | |
794 | struct inode *inode = page->mapping->host; | |
795 | ||
796 | if (S_ISDIR(inode->i_mode)) | |
797 | return CURSEG_HOT_DATA; | |
798 | else if (is_cold_data(page) || is_cold_file(inode)) | |
799 | return CURSEG_COLD_DATA; | |
800 | else | |
801 | return CURSEG_WARM_DATA; | |
802 | } else { | |
803 | if (IS_DNODE(page)) | |
804 | return is_cold_node(page) ? CURSEG_WARM_NODE : | |
805 | CURSEG_HOT_NODE; | |
806 | else | |
807 | return CURSEG_COLD_NODE; | |
808 | } | |
809 | } | |
810 | ||
811 | static int __get_segment_type(struct page *page, enum page_type p_type) | |
812 | { | |
813 | struct f2fs_sb_info *sbi = F2FS_SB(page->mapping->host->i_sb); | |
814 | switch (sbi->active_logs) { | |
815 | case 2: | |
816 | return __get_segment_type_2(page, p_type); | |
817 | case 4: | |
818 | return __get_segment_type_4(page, p_type); | |
351df4b2 | 819 | } |
12a67146 JK |
820 | /* NR_CURSEG_TYPE(6) logs by default */ |
821 | BUG_ON(sbi->active_logs != NR_CURSEG_TYPE); | |
822 | return __get_segment_type_6(page, p_type); | |
351df4b2 JK |
823 | } |
824 | ||
825 | static void do_write_page(struct f2fs_sb_info *sbi, struct page *page, | |
826 | block_t old_blkaddr, block_t *new_blkaddr, | |
827 | struct f2fs_summary *sum, enum page_type p_type) | |
828 | { | |
829 | struct sit_info *sit_i = SIT_I(sbi); | |
830 | struct curseg_info *curseg; | |
831 | unsigned int old_cursegno; | |
832 | int type; | |
833 | ||
834 | type = __get_segment_type(page, p_type); | |
835 | curseg = CURSEG_I(sbi, type); | |
836 | ||
837 | mutex_lock(&curseg->curseg_mutex); | |
838 | ||
839 | *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); | |
840 | old_cursegno = curseg->segno; | |
841 | ||
842 | /* | |
843 | * __add_sum_entry should be resided under the curseg_mutex | |
844 | * because, this function updates a summary entry in the | |
845 | * current summary block. | |
846 | */ | |
847 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
848 | ||
849 | mutex_lock(&sit_i->sentry_lock); | |
850 | __refresh_next_blkoff(sbi, curseg); | |
851 | sbi->block_count[curseg->alloc_type]++; | |
852 | ||
853 | /* | |
854 | * SIT information should be updated before segment allocation, | |
855 | * since SSR needs latest valid block information. | |
856 | */ | |
857 | refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr); | |
858 | ||
859 | if (!__has_curseg_space(sbi, type)) | |
860 | sit_i->s_ops->allocate_segment(sbi, type, false); | |
861 | ||
862 | locate_dirty_segment(sbi, old_cursegno); | |
863 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
864 | mutex_unlock(&sit_i->sentry_lock); | |
865 | ||
866 | if (p_type == NODE) | |
867 | fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); | |
868 | ||
869 | /* writeout dirty page into bdev */ | |
870 | submit_write_page(sbi, page, *new_blkaddr, p_type); | |
871 | ||
872 | mutex_unlock(&curseg->curseg_mutex); | |
873 | } | |
874 | ||
577e3495 | 875 | void write_meta_page(struct f2fs_sb_info *sbi, struct page *page) |
351df4b2 | 876 | { |
351df4b2 JK |
877 | set_page_writeback(page); |
878 | submit_write_page(sbi, page, page->index, META); | |
351df4b2 JK |
879 | } |
880 | ||
881 | void write_node_page(struct f2fs_sb_info *sbi, struct page *page, | |
882 | unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr) | |
883 | { | |
884 | struct f2fs_summary sum; | |
885 | set_summary(&sum, nid, 0, 0); | |
886 | do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, NODE); | |
887 | } | |
888 | ||
889 | void write_data_page(struct inode *inode, struct page *page, | |
890 | struct dnode_of_data *dn, block_t old_blkaddr, | |
891 | block_t *new_blkaddr) | |
892 | { | |
893 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
894 | struct f2fs_summary sum; | |
895 | struct node_info ni; | |
896 | ||
897 | BUG_ON(old_blkaddr == NULL_ADDR); | |
898 | get_node_info(sbi, dn->nid, &ni); | |
899 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
900 | ||
901 | do_write_page(sbi, page, old_blkaddr, | |
902 | new_blkaddr, &sum, DATA); | |
903 | } | |
904 | ||
905 | void rewrite_data_page(struct f2fs_sb_info *sbi, struct page *page, | |
906 | block_t old_blk_addr) | |
907 | { | |
908 | submit_write_page(sbi, page, old_blk_addr, DATA); | |
909 | } | |
910 | ||
911 | void recover_data_page(struct f2fs_sb_info *sbi, | |
912 | struct page *page, struct f2fs_summary *sum, | |
913 | block_t old_blkaddr, block_t new_blkaddr) | |
914 | { | |
915 | struct sit_info *sit_i = SIT_I(sbi); | |
916 | struct curseg_info *curseg; | |
917 | unsigned int segno, old_cursegno; | |
918 | struct seg_entry *se; | |
919 | int type; | |
920 | ||
921 | segno = GET_SEGNO(sbi, new_blkaddr); | |
922 | se = get_seg_entry(sbi, segno); | |
923 | type = se->type; | |
924 | ||
925 | if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { | |
926 | if (old_blkaddr == NULL_ADDR) | |
927 | type = CURSEG_COLD_DATA; | |
928 | else | |
929 | type = CURSEG_WARM_DATA; | |
930 | } | |
931 | curseg = CURSEG_I(sbi, type); | |
932 | ||
933 | mutex_lock(&curseg->curseg_mutex); | |
934 | mutex_lock(&sit_i->sentry_lock); | |
935 | ||
936 | old_cursegno = curseg->segno; | |
937 | ||
938 | /* change the current segment */ | |
939 | if (segno != curseg->segno) { | |
940 | curseg->next_segno = segno; | |
941 | change_curseg(sbi, type, true); | |
942 | } | |
943 | ||
944 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & | |
945 | (sbi->blocks_per_seg - 1); | |
946 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
947 | ||
948 | refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); | |
949 | ||
950 | locate_dirty_segment(sbi, old_cursegno); | |
951 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
952 | ||
953 | mutex_unlock(&sit_i->sentry_lock); | |
954 | mutex_unlock(&curseg->curseg_mutex); | |
955 | } | |
956 | ||
957 | void rewrite_node_page(struct f2fs_sb_info *sbi, | |
958 | struct page *page, struct f2fs_summary *sum, | |
959 | block_t old_blkaddr, block_t new_blkaddr) | |
960 | { | |
961 | struct sit_info *sit_i = SIT_I(sbi); | |
962 | int type = CURSEG_WARM_NODE; | |
963 | struct curseg_info *curseg; | |
964 | unsigned int segno, old_cursegno; | |
965 | block_t next_blkaddr = next_blkaddr_of_node(page); | |
966 | unsigned int next_segno = GET_SEGNO(sbi, next_blkaddr); | |
967 | ||
968 | curseg = CURSEG_I(sbi, type); | |
969 | ||
970 | mutex_lock(&curseg->curseg_mutex); | |
971 | mutex_lock(&sit_i->sentry_lock); | |
972 | ||
973 | segno = GET_SEGNO(sbi, new_blkaddr); | |
974 | old_cursegno = curseg->segno; | |
975 | ||
976 | /* change the current segment */ | |
977 | if (segno != curseg->segno) { | |
978 | curseg->next_segno = segno; | |
979 | change_curseg(sbi, type, true); | |
980 | } | |
981 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, new_blkaddr) & | |
982 | (sbi->blocks_per_seg - 1); | |
983 | __add_sum_entry(sbi, type, sum, curseg->next_blkoff); | |
984 | ||
985 | /* change the current log to the next block addr in advance */ | |
986 | if (next_segno != segno) { | |
987 | curseg->next_segno = next_segno; | |
988 | change_curseg(sbi, type, true); | |
989 | } | |
990 | curseg->next_blkoff = GET_SEGOFF_FROM_SEG0(sbi, next_blkaddr) & | |
991 | (sbi->blocks_per_seg - 1); | |
992 | ||
993 | /* rewrite node page */ | |
994 | set_page_writeback(page); | |
995 | submit_write_page(sbi, page, new_blkaddr, NODE); | |
996 | f2fs_submit_bio(sbi, NODE, true); | |
997 | refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); | |
998 | ||
999 | locate_dirty_segment(sbi, old_cursegno); | |
1000 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old_blkaddr)); | |
1001 | ||
1002 | mutex_unlock(&sit_i->sentry_lock); | |
1003 | mutex_unlock(&curseg->curseg_mutex); | |
1004 | } | |
1005 | ||
1006 | static int read_compacted_summaries(struct f2fs_sb_info *sbi) | |
1007 | { | |
1008 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1009 | struct curseg_info *seg_i; | |
1010 | unsigned char *kaddr; | |
1011 | struct page *page; | |
1012 | block_t start; | |
1013 | int i, j, offset; | |
1014 | ||
1015 | start = start_sum_block(sbi); | |
1016 | ||
1017 | page = get_meta_page(sbi, start++); | |
1018 | kaddr = (unsigned char *)page_address(page); | |
1019 | ||
1020 | /* Step 1: restore nat cache */ | |
1021 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1022 | memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE); | |
1023 | ||
1024 | /* Step 2: restore sit cache */ | |
1025 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1026 | memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE, | |
1027 | SUM_JOURNAL_SIZE); | |
1028 | offset = 2 * SUM_JOURNAL_SIZE; | |
1029 | ||
1030 | /* Step 3: restore summary entries */ | |
1031 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1032 | unsigned short blk_off; | |
1033 | unsigned int segno; | |
1034 | ||
1035 | seg_i = CURSEG_I(sbi, i); | |
1036 | segno = le32_to_cpu(ckpt->cur_data_segno[i]); | |
1037 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]); | |
1038 | seg_i->next_segno = segno; | |
1039 | reset_curseg(sbi, i, 0); | |
1040 | seg_i->alloc_type = ckpt->alloc_type[i]; | |
1041 | seg_i->next_blkoff = blk_off; | |
1042 | ||
1043 | if (seg_i->alloc_type == SSR) | |
1044 | blk_off = sbi->blocks_per_seg; | |
1045 | ||
1046 | for (j = 0; j < blk_off; j++) { | |
1047 | struct f2fs_summary *s; | |
1048 | s = (struct f2fs_summary *)(kaddr + offset); | |
1049 | seg_i->sum_blk->entries[j] = *s; | |
1050 | offset += SUMMARY_SIZE; | |
1051 | if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1052 | SUM_FOOTER_SIZE) | |
1053 | continue; | |
1054 | ||
1055 | f2fs_put_page(page, 1); | |
1056 | page = NULL; | |
1057 | ||
1058 | page = get_meta_page(sbi, start++); | |
1059 | kaddr = (unsigned char *)page_address(page); | |
1060 | offset = 0; | |
1061 | } | |
1062 | } | |
1063 | f2fs_put_page(page, 1); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) | |
1068 | { | |
1069 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1070 | struct f2fs_summary_block *sum; | |
1071 | struct curseg_info *curseg; | |
1072 | struct page *new; | |
1073 | unsigned short blk_off; | |
1074 | unsigned int segno = 0; | |
1075 | block_t blk_addr = 0; | |
1076 | ||
1077 | /* get segment number and block addr */ | |
1078 | if (IS_DATASEG(type)) { | |
1079 | segno = le32_to_cpu(ckpt->cur_data_segno[type]); | |
1080 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - | |
1081 | CURSEG_HOT_DATA]); | |
25ca923b | 1082 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1083 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); |
1084 | else | |
1085 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); | |
1086 | } else { | |
1087 | segno = le32_to_cpu(ckpt->cur_node_segno[type - | |
1088 | CURSEG_HOT_NODE]); | |
1089 | blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - | |
1090 | CURSEG_HOT_NODE]); | |
25ca923b | 1091 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1092 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, |
1093 | type - CURSEG_HOT_NODE); | |
1094 | else | |
1095 | blk_addr = GET_SUM_BLOCK(sbi, segno); | |
1096 | } | |
1097 | ||
1098 | new = get_meta_page(sbi, blk_addr); | |
1099 | sum = (struct f2fs_summary_block *)page_address(new); | |
1100 | ||
1101 | if (IS_NODESEG(type)) { | |
25ca923b | 1102 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) { |
351df4b2 JK |
1103 | struct f2fs_summary *ns = &sum->entries[0]; |
1104 | int i; | |
1105 | for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { | |
1106 | ns->version = 0; | |
1107 | ns->ofs_in_node = 0; | |
1108 | } | |
1109 | } else { | |
1110 | if (restore_node_summary(sbi, segno, sum)) { | |
1111 | f2fs_put_page(new, 1); | |
1112 | return -EINVAL; | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | /* set uncompleted segment to curseg */ | |
1118 | curseg = CURSEG_I(sbi, type); | |
1119 | mutex_lock(&curseg->curseg_mutex); | |
1120 | memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE); | |
1121 | curseg->next_segno = segno; | |
1122 | reset_curseg(sbi, type, 0); | |
1123 | curseg->alloc_type = ckpt->alloc_type[type]; | |
1124 | curseg->next_blkoff = blk_off; | |
1125 | mutex_unlock(&curseg->curseg_mutex); | |
1126 | f2fs_put_page(new, 1); | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | static int restore_curseg_summaries(struct f2fs_sb_info *sbi) | |
1131 | { | |
1132 | int type = CURSEG_HOT_DATA; | |
1133 | ||
25ca923b | 1134 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { |
351df4b2 JK |
1135 | /* restore for compacted data summary */ |
1136 | if (read_compacted_summaries(sbi)) | |
1137 | return -EINVAL; | |
1138 | type = CURSEG_HOT_NODE; | |
1139 | } | |
1140 | ||
1141 | for (; type <= CURSEG_COLD_NODE; type++) | |
1142 | if (read_normal_summaries(sbi, type)) | |
1143 | return -EINVAL; | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1148 | { | |
1149 | struct page *page; | |
1150 | unsigned char *kaddr; | |
1151 | struct f2fs_summary *summary; | |
1152 | struct curseg_info *seg_i; | |
1153 | int written_size = 0; | |
1154 | int i, j; | |
1155 | ||
1156 | page = grab_meta_page(sbi, blkaddr++); | |
1157 | kaddr = (unsigned char *)page_address(page); | |
1158 | ||
1159 | /* Step 1: write nat cache */ | |
1160 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1161 | memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE); | |
1162 | written_size += SUM_JOURNAL_SIZE; | |
1163 | ||
1164 | /* Step 2: write sit cache */ | |
1165 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1166 | memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits, | |
1167 | SUM_JOURNAL_SIZE); | |
1168 | written_size += SUM_JOURNAL_SIZE; | |
1169 | ||
1170 | set_page_dirty(page); | |
1171 | ||
1172 | /* Step 3: write summary entries */ | |
1173 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1174 | unsigned short blkoff; | |
1175 | seg_i = CURSEG_I(sbi, i); | |
1176 | if (sbi->ckpt->alloc_type[i] == SSR) | |
1177 | blkoff = sbi->blocks_per_seg; | |
1178 | else | |
1179 | blkoff = curseg_blkoff(sbi, i); | |
1180 | ||
1181 | for (j = 0; j < blkoff; j++) { | |
1182 | if (!page) { | |
1183 | page = grab_meta_page(sbi, blkaddr++); | |
1184 | kaddr = (unsigned char *)page_address(page); | |
1185 | written_size = 0; | |
1186 | } | |
1187 | summary = (struct f2fs_summary *)(kaddr + written_size); | |
1188 | *summary = seg_i->sum_blk->entries[j]; | |
1189 | written_size += SUMMARY_SIZE; | |
1190 | set_page_dirty(page); | |
1191 | ||
1192 | if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1193 | SUM_FOOTER_SIZE) | |
1194 | continue; | |
1195 | ||
1196 | f2fs_put_page(page, 1); | |
1197 | page = NULL; | |
1198 | } | |
1199 | } | |
1200 | if (page) | |
1201 | f2fs_put_page(page, 1); | |
1202 | } | |
1203 | ||
1204 | static void write_normal_summaries(struct f2fs_sb_info *sbi, | |
1205 | block_t blkaddr, int type) | |
1206 | { | |
1207 | int i, end; | |
1208 | if (IS_DATASEG(type)) | |
1209 | end = type + NR_CURSEG_DATA_TYPE; | |
1210 | else | |
1211 | end = type + NR_CURSEG_NODE_TYPE; | |
1212 | ||
1213 | for (i = type; i < end; i++) { | |
1214 | struct curseg_info *sum = CURSEG_I(sbi, i); | |
1215 | mutex_lock(&sum->curseg_mutex); | |
1216 | write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type)); | |
1217 | mutex_unlock(&sum->curseg_mutex); | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1222 | { | |
25ca923b | 1223 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) |
351df4b2 JK |
1224 | write_compacted_summaries(sbi, start_blk); |
1225 | else | |
1226 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); | |
1227 | } | |
1228 | ||
1229 | void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1230 | { | |
25ca923b | 1231 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) |
351df4b2 JK |
1232 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); |
1233 | return; | |
1234 | } | |
1235 | ||
1236 | int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, | |
1237 | unsigned int val, int alloc) | |
1238 | { | |
1239 | int i; | |
1240 | ||
1241 | if (type == NAT_JOURNAL) { | |
1242 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1243 | if (le32_to_cpu(nid_in_journal(sum, i)) == val) | |
1244 | return i; | |
1245 | } | |
1246 | if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) | |
1247 | return update_nats_in_cursum(sum, 1); | |
1248 | } else if (type == SIT_JOURNAL) { | |
1249 | for (i = 0; i < sits_in_cursum(sum); i++) | |
1250 | if (le32_to_cpu(segno_in_journal(sum, i)) == val) | |
1251 | return i; | |
1252 | if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES) | |
1253 | return update_sits_in_cursum(sum, 1); | |
1254 | } | |
1255 | return -1; | |
1256 | } | |
1257 | ||
1258 | static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, | |
1259 | unsigned int segno) | |
1260 | { | |
1261 | struct sit_info *sit_i = SIT_I(sbi); | |
1262 | unsigned int offset = SIT_BLOCK_OFFSET(sit_i, segno); | |
1263 | block_t blk_addr = sit_i->sit_base_addr + offset; | |
1264 | ||
1265 | check_seg_range(sbi, segno); | |
1266 | ||
1267 | /* calculate sit block address */ | |
1268 | if (f2fs_test_bit(offset, sit_i->sit_bitmap)) | |
1269 | blk_addr += sit_i->sit_blocks; | |
1270 | ||
1271 | return get_meta_page(sbi, blk_addr); | |
1272 | } | |
1273 | ||
1274 | static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, | |
1275 | unsigned int start) | |
1276 | { | |
1277 | struct sit_info *sit_i = SIT_I(sbi); | |
1278 | struct page *src_page, *dst_page; | |
1279 | pgoff_t src_off, dst_off; | |
1280 | void *src_addr, *dst_addr; | |
1281 | ||
1282 | src_off = current_sit_addr(sbi, start); | |
1283 | dst_off = next_sit_addr(sbi, src_off); | |
1284 | ||
1285 | /* get current sit block page without lock */ | |
1286 | src_page = get_meta_page(sbi, src_off); | |
1287 | dst_page = grab_meta_page(sbi, dst_off); | |
1288 | BUG_ON(PageDirty(src_page)); | |
1289 | ||
1290 | src_addr = page_address(src_page); | |
1291 | dst_addr = page_address(dst_page); | |
1292 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
1293 | ||
1294 | set_page_dirty(dst_page); | |
1295 | f2fs_put_page(src_page, 1); | |
1296 | ||
1297 | set_to_next_sit(sit_i, start); | |
1298 | ||
1299 | return dst_page; | |
1300 | } | |
1301 | ||
1302 | static bool flush_sits_in_journal(struct f2fs_sb_info *sbi) | |
1303 | { | |
1304 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1305 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1306 | int i; | |
1307 | ||
1308 | /* | |
1309 | * If the journal area in the current summary is full of sit entries, | |
1310 | * all the sit entries will be flushed. Otherwise the sit entries | |
1311 | * are not able to replace with newly hot sit entries. | |
1312 | */ | |
1313 | if (sits_in_cursum(sum) >= SIT_JOURNAL_ENTRIES) { | |
1314 | for (i = sits_in_cursum(sum) - 1; i >= 0; i--) { | |
1315 | unsigned int segno; | |
1316 | segno = le32_to_cpu(segno_in_journal(sum, i)); | |
1317 | __mark_sit_entry_dirty(sbi, segno); | |
1318 | } | |
1319 | update_sits_in_cursum(sum, -sits_in_cursum(sum)); | |
1320 | return 1; | |
1321 | } | |
1322 | return 0; | |
1323 | } | |
1324 | ||
0a8165d7 | 1325 | /* |
351df4b2 JK |
1326 | * CP calls this function, which flushes SIT entries including sit_journal, |
1327 | * and moves prefree segs to free segs. | |
1328 | */ | |
1329 | void flush_sit_entries(struct f2fs_sb_info *sbi) | |
1330 | { | |
1331 | struct sit_info *sit_i = SIT_I(sbi); | |
1332 | unsigned long *bitmap = sit_i->dirty_sentries_bitmap; | |
1333 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1334 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1335 | unsigned long nsegs = TOTAL_SEGS(sbi); | |
1336 | struct page *page = NULL; | |
1337 | struct f2fs_sit_block *raw_sit = NULL; | |
1338 | unsigned int start = 0, end = 0; | |
1339 | unsigned int segno = -1; | |
1340 | bool flushed; | |
1341 | ||
1342 | mutex_lock(&curseg->curseg_mutex); | |
1343 | mutex_lock(&sit_i->sentry_lock); | |
1344 | ||
1345 | /* | |
1346 | * "flushed" indicates whether sit entries in journal are flushed | |
1347 | * to the SIT area or not. | |
1348 | */ | |
1349 | flushed = flush_sits_in_journal(sbi); | |
1350 | ||
1351 | while ((segno = find_next_bit(bitmap, nsegs, segno + 1)) < nsegs) { | |
1352 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
1353 | int sit_offset, offset; | |
1354 | ||
1355 | sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); | |
1356 | ||
1357 | if (flushed) | |
1358 | goto to_sit_page; | |
1359 | ||
1360 | offset = lookup_journal_in_cursum(sum, SIT_JOURNAL, segno, 1); | |
1361 | if (offset >= 0) { | |
1362 | segno_in_journal(sum, offset) = cpu_to_le32(segno); | |
1363 | seg_info_to_raw_sit(se, &sit_in_journal(sum, offset)); | |
1364 | goto flush_done; | |
1365 | } | |
1366 | to_sit_page: | |
1367 | if (!page || (start > segno) || (segno > end)) { | |
1368 | if (page) { | |
1369 | f2fs_put_page(page, 1); | |
1370 | page = NULL; | |
1371 | } | |
1372 | ||
1373 | start = START_SEGNO(sit_i, segno); | |
1374 | end = start + SIT_ENTRY_PER_BLOCK - 1; | |
1375 | ||
1376 | /* read sit block that will be updated */ | |
1377 | page = get_next_sit_page(sbi, start); | |
1378 | raw_sit = page_address(page); | |
1379 | } | |
1380 | ||
1381 | /* udpate entry in SIT block */ | |
1382 | seg_info_to_raw_sit(se, &raw_sit->entries[sit_offset]); | |
1383 | flush_done: | |
1384 | __clear_bit(segno, bitmap); | |
1385 | sit_i->dirty_sentries--; | |
1386 | } | |
1387 | mutex_unlock(&sit_i->sentry_lock); | |
1388 | mutex_unlock(&curseg->curseg_mutex); | |
1389 | ||
1390 | /* writeout last modified SIT block */ | |
1391 | f2fs_put_page(page, 1); | |
1392 | ||
1393 | set_prefree_as_free_segments(sbi); | |
1394 | } | |
1395 | ||
1396 | static int build_sit_info(struct f2fs_sb_info *sbi) | |
1397 | { | |
1398 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
1399 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1400 | struct sit_info *sit_i; | |
1401 | unsigned int sit_segs, start; | |
1402 | char *src_bitmap, *dst_bitmap; | |
1403 | unsigned int bitmap_size; | |
1404 | ||
1405 | /* allocate memory for SIT information */ | |
1406 | sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL); | |
1407 | if (!sit_i) | |
1408 | return -ENOMEM; | |
1409 | ||
1410 | SM_I(sbi)->sit_info = sit_i; | |
1411 | ||
1412 | sit_i->sentries = vzalloc(TOTAL_SEGS(sbi) * sizeof(struct seg_entry)); | |
1413 | if (!sit_i->sentries) | |
1414 | return -ENOMEM; | |
1415 | ||
1416 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1417 | sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL); | |
1418 | if (!sit_i->dirty_sentries_bitmap) | |
1419 | return -ENOMEM; | |
1420 | ||
1421 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1422 | sit_i->sentries[start].cur_valid_map | |
1423 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1424 | sit_i->sentries[start].ckpt_valid_map | |
1425 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1426 | if (!sit_i->sentries[start].cur_valid_map | |
1427 | || !sit_i->sentries[start].ckpt_valid_map) | |
1428 | return -ENOMEM; | |
1429 | } | |
1430 | ||
1431 | if (sbi->segs_per_sec > 1) { | |
53cf9522 | 1432 | sit_i->sec_entries = vzalloc(TOTAL_SECS(sbi) * |
351df4b2 JK |
1433 | sizeof(struct sec_entry)); |
1434 | if (!sit_i->sec_entries) | |
1435 | return -ENOMEM; | |
1436 | } | |
1437 | ||
1438 | /* get information related with SIT */ | |
1439 | sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; | |
1440 | ||
1441 | /* setup SIT bitmap from ckeckpoint pack */ | |
1442 | bitmap_size = __bitmap_size(sbi, SIT_BITMAP); | |
1443 | src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); | |
1444 | ||
79b5793b | 1445 | dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); |
351df4b2 JK |
1446 | if (!dst_bitmap) |
1447 | return -ENOMEM; | |
351df4b2 JK |
1448 | |
1449 | /* init SIT information */ | |
1450 | sit_i->s_ops = &default_salloc_ops; | |
1451 | ||
1452 | sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); | |
1453 | sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; | |
1454 | sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count); | |
1455 | sit_i->sit_bitmap = dst_bitmap; | |
1456 | sit_i->bitmap_size = bitmap_size; | |
1457 | sit_i->dirty_sentries = 0; | |
1458 | sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; | |
1459 | sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); | |
1460 | sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec; | |
1461 | mutex_init(&sit_i->sentry_lock); | |
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | static int build_free_segmap(struct f2fs_sb_info *sbi) | |
1466 | { | |
1467 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
1468 | struct free_segmap_info *free_i; | |
1469 | unsigned int bitmap_size, sec_bitmap_size; | |
1470 | ||
1471 | /* allocate memory for free segmap information */ | |
1472 | free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL); | |
1473 | if (!free_i) | |
1474 | return -ENOMEM; | |
1475 | ||
1476 | SM_I(sbi)->free_info = free_i; | |
1477 | ||
1478 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1479 | free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL); | |
1480 | if (!free_i->free_segmap) | |
1481 | return -ENOMEM; | |
1482 | ||
53cf9522 | 1483 | sec_bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); |
351df4b2 JK |
1484 | free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL); |
1485 | if (!free_i->free_secmap) | |
1486 | return -ENOMEM; | |
1487 | ||
1488 | /* set all segments as dirty temporarily */ | |
1489 | memset(free_i->free_segmap, 0xff, bitmap_size); | |
1490 | memset(free_i->free_secmap, 0xff, sec_bitmap_size); | |
1491 | ||
1492 | /* init free segmap information */ | |
1493 | free_i->start_segno = | |
1494 | (unsigned int) GET_SEGNO_FROM_SEG0(sbi, sm_info->main_blkaddr); | |
1495 | free_i->free_segments = 0; | |
1496 | free_i->free_sections = 0; | |
1497 | rwlock_init(&free_i->segmap_lock); | |
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | static int build_curseg(struct f2fs_sb_info *sbi) | |
1502 | { | |
1042d60f | 1503 | struct curseg_info *array; |
351df4b2 JK |
1504 | int i; |
1505 | ||
1506 | array = kzalloc(sizeof(*array) * NR_CURSEG_TYPE, GFP_KERNEL); | |
1507 | if (!array) | |
1508 | return -ENOMEM; | |
1509 | ||
1510 | SM_I(sbi)->curseg_array = array; | |
1511 | ||
1512 | for (i = 0; i < NR_CURSEG_TYPE; i++) { | |
1513 | mutex_init(&array[i].curseg_mutex); | |
1514 | array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); | |
1515 | if (!array[i].sum_blk) | |
1516 | return -ENOMEM; | |
1517 | array[i].segno = NULL_SEGNO; | |
1518 | array[i].next_blkoff = 0; | |
1519 | } | |
1520 | return restore_curseg_summaries(sbi); | |
1521 | } | |
1522 | ||
1523 | static void build_sit_entries(struct f2fs_sb_info *sbi) | |
1524 | { | |
1525 | struct sit_info *sit_i = SIT_I(sbi); | |
1526 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1527 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1528 | unsigned int start; | |
1529 | ||
1530 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1531 | struct seg_entry *se = &sit_i->sentries[start]; | |
1532 | struct f2fs_sit_block *sit_blk; | |
1533 | struct f2fs_sit_entry sit; | |
1534 | struct page *page; | |
1535 | int i; | |
1536 | ||
1537 | mutex_lock(&curseg->curseg_mutex); | |
1538 | for (i = 0; i < sits_in_cursum(sum); i++) { | |
1539 | if (le32_to_cpu(segno_in_journal(sum, i)) == start) { | |
1540 | sit = sit_in_journal(sum, i); | |
1541 | mutex_unlock(&curseg->curseg_mutex); | |
1542 | goto got_it; | |
1543 | } | |
1544 | } | |
1545 | mutex_unlock(&curseg->curseg_mutex); | |
1546 | page = get_current_sit_page(sbi, start); | |
1547 | sit_blk = (struct f2fs_sit_block *)page_address(page); | |
1548 | sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; | |
1549 | f2fs_put_page(page, 1); | |
1550 | got_it: | |
1551 | check_block_count(sbi, start, &sit); | |
1552 | seg_info_from_raw_sit(se, &sit); | |
1553 | if (sbi->segs_per_sec > 1) { | |
1554 | struct sec_entry *e = get_sec_entry(sbi, start); | |
1555 | e->valid_blocks += se->valid_blocks; | |
1556 | } | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | static void init_free_segmap(struct f2fs_sb_info *sbi) | |
1561 | { | |
1562 | unsigned int start; | |
1563 | int type; | |
1564 | ||
1565 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1566 | struct seg_entry *sentry = get_seg_entry(sbi, start); | |
1567 | if (!sentry->valid_blocks) | |
1568 | __set_free(sbi, start); | |
1569 | } | |
1570 | ||
1571 | /* set use the current segments */ | |
1572 | for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { | |
1573 | struct curseg_info *curseg_t = CURSEG_I(sbi, type); | |
1574 | __set_test_and_inuse(sbi, curseg_t->segno); | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | static void init_dirty_segmap(struct f2fs_sb_info *sbi) | |
1579 | { | |
1580 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1581 | struct free_segmap_info *free_i = FREE_I(sbi); | |
1582 | unsigned int segno = 0, offset = 0; | |
1583 | unsigned short valid_blocks; | |
1584 | ||
1585 | while (segno < TOTAL_SEGS(sbi)) { | |
1586 | /* find dirty segment based on free segmap */ | |
1587 | segno = find_next_inuse(free_i, TOTAL_SEGS(sbi), offset); | |
1588 | if (segno >= TOTAL_SEGS(sbi)) | |
1589 | break; | |
1590 | offset = segno + 1; | |
1591 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
1592 | if (valid_blocks >= sbi->blocks_per_seg || !valid_blocks) | |
1593 | continue; | |
1594 | mutex_lock(&dirty_i->seglist_lock); | |
1595 | __locate_dirty_segment(sbi, segno, DIRTY); | |
1596 | mutex_unlock(&dirty_i->seglist_lock); | |
1597 | } | |
1598 | } | |
1599 | ||
5ec4e49f | 1600 | static int init_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
1601 | { |
1602 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 1603 | unsigned int bitmap_size = f2fs_bitmap_size(TOTAL_SECS(sbi)); |
351df4b2 | 1604 | |
5ec4e49f JK |
1605 | dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL); |
1606 | if (!dirty_i->victim_secmap) | |
351df4b2 JK |
1607 | return -ENOMEM; |
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static int build_dirty_segmap(struct f2fs_sb_info *sbi) | |
1612 | { | |
1613 | struct dirty_seglist_info *dirty_i; | |
1614 | unsigned int bitmap_size, i; | |
1615 | ||
1616 | /* allocate memory for dirty segments list information */ | |
1617 | dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL); | |
1618 | if (!dirty_i) | |
1619 | return -ENOMEM; | |
1620 | ||
1621 | SM_I(sbi)->dirty_info = dirty_i; | |
1622 | mutex_init(&dirty_i->seglist_lock); | |
1623 | ||
1624 | bitmap_size = f2fs_bitmap_size(TOTAL_SEGS(sbi)); | |
1625 | ||
1626 | for (i = 0; i < NR_DIRTY_TYPE; i++) { | |
1627 | dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL); | |
351df4b2 JK |
1628 | if (!dirty_i->dirty_segmap[i]) |
1629 | return -ENOMEM; | |
1630 | } | |
1631 | ||
1632 | init_dirty_segmap(sbi); | |
5ec4e49f | 1633 | return init_victim_secmap(sbi); |
351df4b2 JK |
1634 | } |
1635 | ||
0a8165d7 | 1636 | /* |
351df4b2 JK |
1637 | * Update min, max modified time for cost-benefit GC algorithm |
1638 | */ | |
1639 | static void init_min_max_mtime(struct f2fs_sb_info *sbi) | |
1640 | { | |
1641 | struct sit_info *sit_i = SIT_I(sbi); | |
1642 | unsigned int segno; | |
1643 | ||
1644 | mutex_lock(&sit_i->sentry_lock); | |
1645 | ||
1646 | sit_i->min_mtime = LLONG_MAX; | |
1647 | ||
1648 | for (segno = 0; segno < TOTAL_SEGS(sbi); segno += sbi->segs_per_sec) { | |
1649 | unsigned int i; | |
1650 | unsigned long long mtime = 0; | |
1651 | ||
1652 | for (i = 0; i < sbi->segs_per_sec; i++) | |
1653 | mtime += get_seg_entry(sbi, segno + i)->mtime; | |
1654 | ||
1655 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
1656 | ||
1657 | if (sit_i->min_mtime > mtime) | |
1658 | sit_i->min_mtime = mtime; | |
1659 | } | |
1660 | sit_i->max_mtime = get_mtime(sbi); | |
1661 | mutex_unlock(&sit_i->sentry_lock); | |
1662 | } | |
1663 | ||
1664 | int build_segment_manager(struct f2fs_sb_info *sbi) | |
1665 | { | |
1666 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
1667 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1042d60f | 1668 | struct f2fs_sm_info *sm_info; |
351df4b2 JK |
1669 | int err; |
1670 | ||
1671 | sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL); | |
1672 | if (!sm_info) | |
1673 | return -ENOMEM; | |
1674 | ||
1675 | /* init sm info */ | |
1676 | sbi->sm_info = sm_info; | |
1677 | INIT_LIST_HEAD(&sm_info->wblist_head); | |
1678 | spin_lock_init(&sm_info->wblist_lock); | |
1679 | sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); | |
1680 | sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
1681 | sm_info->segment_count = le32_to_cpu(raw_super->segment_count); | |
1682 | sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); | |
1683 | sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); | |
1684 | sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); | |
1685 | sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
1686 | ||
1687 | err = build_sit_info(sbi); | |
1688 | if (err) | |
1689 | return err; | |
1690 | err = build_free_segmap(sbi); | |
1691 | if (err) | |
1692 | return err; | |
1693 | err = build_curseg(sbi); | |
1694 | if (err) | |
1695 | return err; | |
1696 | ||
1697 | /* reinit free segmap based on SIT */ | |
1698 | build_sit_entries(sbi); | |
1699 | ||
1700 | init_free_segmap(sbi); | |
1701 | err = build_dirty_segmap(sbi); | |
1702 | if (err) | |
1703 | return err; | |
1704 | ||
1705 | init_min_max_mtime(sbi); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | static void discard_dirty_segmap(struct f2fs_sb_info *sbi, | |
1710 | enum dirty_type dirty_type) | |
1711 | { | |
1712 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1713 | ||
1714 | mutex_lock(&dirty_i->seglist_lock); | |
1715 | kfree(dirty_i->dirty_segmap[dirty_type]); | |
1716 | dirty_i->nr_dirty[dirty_type] = 0; | |
1717 | mutex_unlock(&dirty_i->seglist_lock); | |
1718 | } | |
1719 | ||
5ec4e49f | 1720 | static void destroy_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
1721 | { |
1722 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 1723 | kfree(dirty_i->victim_secmap); |
351df4b2 JK |
1724 | } |
1725 | ||
1726 | static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) | |
1727 | { | |
1728 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
1729 | int i; | |
1730 | ||
1731 | if (!dirty_i) | |
1732 | return; | |
1733 | ||
1734 | /* discard pre-free/dirty segments list */ | |
1735 | for (i = 0; i < NR_DIRTY_TYPE; i++) | |
1736 | discard_dirty_segmap(sbi, i); | |
1737 | ||
5ec4e49f | 1738 | destroy_victim_secmap(sbi); |
351df4b2 JK |
1739 | SM_I(sbi)->dirty_info = NULL; |
1740 | kfree(dirty_i); | |
1741 | } | |
1742 | ||
1743 | static void destroy_curseg(struct f2fs_sb_info *sbi) | |
1744 | { | |
1745 | struct curseg_info *array = SM_I(sbi)->curseg_array; | |
1746 | int i; | |
1747 | ||
1748 | if (!array) | |
1749 | return; | |
1750 | SM_I(sbi)->curseg_array = NULL; | |
1751 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
1752 | kfree(array[i].sum_blk); | |
1753 | kfree(array); | |
1754 | } | |
1755 | ||
1756 | static void destroy_free_segmap(struct f2fs_sb_info *sbi) | |
1757 | { | |
1758 | struct free_segmap_info *free_i = SM_I(sbi)->free_info; | |
1759 | if (!free_i) | |
1760 | return; | |
1761 | SM_I(sbi)->free_info = NULL; | |
1762 | kfree(free_i->free_segmap); | |
1763 | kfree(free_i->free_secmap); | |
1764 | kfree(free_i); | |
1765 | } | |
1766 | ||
1767 | static void destroy_sit_info(struct f2fs_sb_info *sbi) | |
1768 | { | |
1769 | struct sit_info *sit_i = SIT_I(sbi); | |
1770 | unsigned int start; | |
1771 | ||
1772 | if (!sit_i) | |
1773 | return; | |
1774 | ||
1775 | if (sit_i->sentries) { | |
1776 | for (start = 0; start < TOTAL_SEGS(sbi); start++) { | |
1777 | kfree(sit_i->sentries[start].cur_valid_map); | |
1778 | kfree(sit_i->sentries[start].ckpt_valid_map); | |
1779 | } | |
1780 | } | |
1781 | vfree(sit_i->sentries); | |
1782 | vfree(sit_i->sec_entries); | |
1783 | kfree(sit_i->dirty_sentries_bitmap); | |
1784 | ||
1785 | SM_I(sbi)->sit_info = NULL; | |
1786 | kfree(sit_i->sit_bitmap); | |
1787 | kfree(sit_i); | |
1788 | } | |
1789 | ||
1790 | void destroy_segment_manager(struct f2fs_sb_info *sbi) | |
1791 | { | |
1792 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
1793 | destroy_dirty_segmap(sbi); | |
1794 | destroy_curseg(sbi); | |
1795 | destroy_free_segmap(sbi); | |
1796 | destroy_sit_info(sbi); | |
1797 | sbi->sm_info = NULL; | |
1798 | kfree(sm_info); | |
1799 | } |