]>
Commit | Line | Data |
---|---|---|
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> |
6b4afdd7 | 16 | #include <linux/kthread.h> |
351df4b2 | 17 | #include <linux/vmalloc.h> |
74de593a | 18 | #include <linux/swap.h> |
351df4b2 JK |
19 | |
20 | #include "f2fs.h" | |
21 | #include "segment.h" | |
22 | #include "node.h" | |
6ec178da | 23 | #include <trace/events/f2fs.h> |
351df4b2 | 24 | |
9a7f143a CL |
25 | #define __reverse_ffz(x) __reverse_ffs(~(x)) |
26 | ||
7fd9e544 | 27 | static struct kmem_cache *discard_entry_slab; |
184a5cd2 | 28 | static struct kmem_cache *sit_entry_set_slab; |
88b88a66 | 29 | static struct kmem_cache *inmem_entry_slab; |
7fd9e544 | 30 | |
9a7f143a CL |
31 | /* |
32 | * __reverse_ffs is copied from include/asm-generic/bitops/__ffs.h since | |
33 | * MSB and LSB are reversed in a byte by f2fs_set_bit. | |
34 | */ | |
35 | static inline unsigned long __reverse_ffs(unsigned long word) | |
36 | { | |
37 | int num = 0; | |
38 | ||
39 | #if BITS_PER_LONG == 64 | |
40 | if ((word & 0xffffffff) == 0) { | |
41 | num += 32; | |
42 | word >>= 32; | |
43 | } | |
44 | #endif | |
45 | if ((word & 0xffff) == 0) { | |
46 | num += 16; | |
47 | word >>= 16; | |
48 | } | |
49 | if ((word & 0xff) == 0) { | |
50 | num += 8; | |
51 | word >>= 8; | |
52 | } | |
53 | if ((word & 0xf0) == 0) | |
54 | num += 4; | |
55 | else | |
56 | word >>= 4; | |
57 | if ((word & 0xc) == 0) | |
58 | num += 2; | |
59 | else | |
60 | word >>= 2; | |
61 | if ((word & 0x2) == 0) | |
62 | num += 1; | |
63 | return num; | |
64 | } | |
65 | ||
66 | /* | |
e1c42045 | 67 | * __find_rev_next(_zero)_bit is copied from lib/find_next_bit.c because |
9a7f143a CL |
68 | * f2fs_set_bit makes MSB and LSB reversed in a byte. |
69 | * Example: | |
70 | * LSB <--> MSB | |
71 | * f2fs_set_bit(0, bitmap) => 0000 0001 | |
72 | * f2fs_set_bit(7, bitmap) => 1000 0000 | |
73 | */ | |
74 | static unsigned long __find_rev_next_bit(const unsigned long *addr, | |
75 | unsigned long size, unsigned long offset) | |
76 | { | |
77 | const unsigned long *p = addr + BIT_WORD(offset); | |
78 | unsigned long result = offset & ~(BITS_PER_LONG - 1); | |
79 | unsigned long tmp; | |
80 | unsigned long mask, submask; | |
81 | unsigned long quot, rest; | |
82 | ||
83 | if (offset >= size) | |
84 | return size; | |
85 | ||
86 | size -= result; | |
87 | offset %= BITS_PER_LONG; | |
88 | if (!offset) | |
89 | goto aligned; | |
90 | ||
91 | tmp = *(p++); | |
92 | quot = (offset >> 3) << 3; | |
93 | rest = offset & 0x7; | |
94 | mask = ~0UL << quot; | |
95 | submask = (unsigned char)(0xff << rest) >> rest; | |
96 | submask <<= quot; | |
97 | mask &= submask; | |
98 | tmp &= mask; | |
99 | if (size < BITS_PER_LONG) | |
100 | goto found_first; | |
101 | if (tmp) | |
102 | goto found_middle; | |
103 | ||
104 | size -= BITS_PER_LONG; | |
105 | result += BITS_PER_LONG; | |
106 | aligned: | |
107 | while (size & ~(BITS_PER_LONG-1)) { | |
108 | tmp = *(p++); | |
109 | if (tmp) | |
110 | goto found_middle; | |
111 | result += BITS_PER_LONG; | |
112 | size -= BITS_PER_LONG; | |
113 | } | |
114 | if (!size) | |
115 | return result; | |
116 | tmp = *p; | |
117 | found_first: | |
118 | tmp &= (~0UL >> (BITS_PER_LONG - size)); | |
119 | if (tmp == 0UL) /* Are any bits set? */ | |
120 | return result + size; /* Nope. */ | |
121 | found_middle: | |
122 | return result + __reverse_ffs(tmp); | |
123 | } | |
124 | ||
125 | static unsigned long __find_rev_next_zero_bit(const unsigned long *addr, | |
126 | unsigned long size, unsigned long offset) | |
127 | { | |
128 | const unsigned long *p = addr + BIT_WORD(offset); | |
129 | unsigned long result = offset & ~(BITS_PER_LONG - 1); | |
130 | unsigned long tmp; | |
131 | unsigned long mask, submask; | |
132 | unsigned long quot, rest; | |
133 | ||
134 | if (offset >= size) | |
135 | return size; | |
136 | ||
137 | size -= result; | |
138 | offset %= BITS_PER_LONG; | |
139 | if (!offset) | |
140 | goto aligned; | |
141 | ||
142 | tmp = *(p++); | |
143 | quot = (offset >> 3) << 3; | |
144 | rest = offset & 0x7; | |
145 | mask = ~(~0UL << quot); | |
146 | submask = (unsigned char)~((unsigned char)(0xff << rest) >> rest); | |
147 | submask <<= quot; | |
148 | mask += submask; | |
149 | tmp |= mask; | |
150 | if (size < BITS_PER_LONG) | |
151 | goto found_first; | |
152 | if (~tmp) | |
153 | goto found_middle; | |
154 | ||
155 | size -= BITS_PER_LONG; | |
156 | result += BITS_PER_LONG; | |
157 | aligned: | |
158 | while (size & ~(BITS_PER_LONG - 1)) { | |
159 | tmp = *(p++); | |
160 | if (~tmp) | |
161 | goto found_middle; | |
162 | result += BITS_PER_LONG; | |
163 | size -= BITS_PER_LONG; | |
164 | } | |
165 | if (!size) | |
166 | return result; | |
167 | tmp = *p; | |
168 | ||
169 | found_first: | |
170 | tmp |= ~0UL << size; | |
171 | if (tmp == ~0UL) /* Are any bits zero? */ | |
172 | return result + size; /* Nope. */ | |
173 | found_middle: | |
174 | return result + __reverse_ffz(tmp); | |
175 | } | |
176 | ||
88b88a66 JK |
177 | void register_inmem_page(struct inode *inode, struct page *page) |
178 | { | |
179 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
180 | struct inmem_pages *new; | |
34ba94ba | 181 | int err; |
9be32d72 | 182 | |
0722b101 JK |
183 | SetPagePrivate(page); |
184 | ||
88b88a66 JK |
185 | new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS); |
186 | ||
187 | /* add atomic page indices to the list */ | |
188 | new->page = page; | |
189 | INIT_LIST_HEAD(&new->list); | |
9be32d72 | 190 | retry: |
88b88a66 JK |
191 | /* increase reference count with clean state */ |
192 | mutex_lock(&fi->inmem_lock); | |
34ba94ba JK |
193 | err = radix_tree_insert(&fi->inmem_root, page->index, new); |
194 | if (err == -EEXIST) { | |
195 | mutex_unlock(&fi->inmem_lock); | |
196 | kmem_cache_free(inmem_entry_slab, new); | |
197 | return; | |
198 | } else if (err) { | |
199 | mutex_unlock(&fi->inmem_lock); | |
34ba94ba JK |
200 | goto retry; |
201 | } | |
88b88a66 JK |
202 | get_page(page); |
203 | list_add_tail(&new->list, &fi->inmem_pages); | |
8dcf2ff7 | 204 | inc_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES); |
88b88a66 JK |
205 | mutex_unlock(&fi->inmem_lock); |
206 | } | |
207 | ||
cbcb2872 JK |
208 | void invalidate_inmem_page(struct inode *inode, struct page *page) |
209 | { | |
210 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
211 | struct inmem_pages *cur; | |
212 | ||
213 | mutex_lock(&fi->inmem_lock); | |
214 | cur = radix_tree_lookup(&fi->inmem_root, page->index); | |
215 | if (cur) { | |
216 | radix_tree_delete(&fi->inmem_root, cur->page->index); | |
217 | f2fs_put_page(cur->page, 0); | |
218 | list_del(&cur->list); | |
219 | kmem_cache_free(inmem_entry_slab, cur); | |
8dcf2ff7 | 220 | dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES); |
cbcb2872 JK |
221 | } |
222 | mutex_unlock(&fi->inmem_lock); | |
223 | } | |
224 | ||
88b88a66 JK |
225 | void commit_inmem_pages(struct inode *inode, bool abort) |
226 | { | |
227 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
228 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
229 | struct inmem_pages *cur, *tmp; | |
230 | bool submit_bio = false; | |
231 | struct f2fs_io_info fio = { | |
232 | .type = DATA, | |
1e84371f | 233 | .rw = WRITE_SYNC | REQ_PRIO, |
88b88a66 JK |
234 | }; |
235 | ||
0341845e JK |
236 | /* |
237 | * The abort is true only when f2fs_evict_inode is called. | |
238 | * Basically, the f2fs_evict_inode doesn't produce any data writes, so | |
239 | * that we don't need to call f2fs_balance_fs. | |
240 | * Otherwise, f2fs_gc in f2fs_balance_fs can wait forever until this | |
241 | * inode becomes free by iget_locked in f2fs_iget. | |
242 | */ | |
70c640b1 | 243 | if (!abort) { |
0341845e | 244 | f2fs_balance_fs(sbi); |
70c640b1 JK |
245 | f2fs_lock_op(sbi); |
246 | } | |
88b88a66 JK |
247 | |
248 | mutex_lock(&fi->inmem_lock); | |
249 | list_for_each_entry_safe(cur, tmp, &fi->inmem_pages, list) { | |
70c640b1 JK |
250 | if (!abort) { |
251 | lock_page(cur->page); | |
252 | if (cur->page->mapping == inode->i_mapping) { | |
253 | f2fs_wait_on_page_writeback(cur->page, DATA); | |
254 | if (clear_page_dirty_for_io(cur->page)) | |
255 | inode_dec_dirty_pages(inode); | |
256 | do_write_data_page(cur->page, &fio); | |
257 | submit_bio = true; | |
258 | } | |
259 | f2fs_put_page(cur->page, 1); | |
260 | } else { | |
261 | put_page(cur->page); | |
88b88a66 | 262 | } |
34ba94ba | 263 | radix_tree_delete(&fi->inmem_root, cur->page->index); |
88b88a66 JK |
264 | list_del(&cur->list); |
265 | kmem_cache_free(inmem_entry_slab, cur); | |
8dcf2ff7 | 266 | dec_page_count(F2FS_I_SB(inode), F2FS_INMEM_PAGES); |
88b88a66 | 267 | } |
88b88a66 JK |
268 | mutex_unlock(&fi->inmem_lock); |
269 | ||
70c640b1 JK |
270 | if (!abort) { |
271 | f2fs_unlock_op(sbi); | |
272 | if (submit_bio) | |
273 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
274 | } | |
88b88a66 JK |
275 | } |
276 | ||
0a8165d7 | 277 | /* |
351df4b2 JK |
278 | * This function balances dirty node and dentry pages. |
279 | * In addition, it controls garbage collection. | |
280 | */ | |
281 | void f2fs_balance_fs(struct f2fs_sb_info *sbi) | |
282 | { | |
351df4b2 | 283 | /* |
029cd28c JK |
284 | * We should do GC or end up with checkpoint, if there are so many dirty |
285 | * dir/node pages without enough free segments. | |
351df4b2 | 286 | */ |
43727527 | 287 | if (has_not_enough_free_secs(sbi, 0)) { |
351df4b2 | 288 | mutex_lock(&sbi->gc_mutex); |
408e9375 | 289 | f2fs_gc(sbi); |
351df4b2 JK |
290 | } |
291 | } | |
292 | ||
4660f9c0 JK |
293 | void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi) |
294 | { | |
295 | /* check the # of cached NAT entries and prefree segments */ | |
296 | if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK) || | |
e5e7ea3c | 297 | excess_prefree_segs(sbi) || |
88a70a69 | 298 | !available_free_memory(sbi, INO_ENTRIES)) |
4660f9c0 JK |
299 | f2fs_sync_fs(sbi->sb, true); |
300 | } | |
301 | ||
2163d198 | 302 | static int issue_flush_thread(void *data) |
6b4afdd7 JK |
303 | { |
304 | struct f2fs_sb_info *sbi = data; | |
a688b9d9 GZ |
305 | struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info; |
306 | wait_queue_head_t *q = &fcc->flush_wait_queue; | |
6b4afdd7 JK |
307 | repeat: |
308 | if (kthread_should_stop()) | |
309 | return 0; | |
310 | ||
721bd4d5 | 311 | if (!llist_empty(&fcc->issue_list)) { |
6b4afdd7 JK |
312 | struct bio *bio = bio_alloc(GFP_NOIO, 0); |
313 | struct flush_cmd *cmd, *next; | |
314 | int ret; | |
315 | ||
721bd4d5 GZ |
316 | fcc->dispatch_list = llist_del_all(&fcc->issue_list); |
317 | fcc->dispatch_list = llist_reverse_order(fcc->dispatch_list); | |
318 | ||
6b4afdd7 JK |
319 | bio->bi_bdev = sbi->sb->s_bdev; |
320 | ret = submit_bio_wait(WRITE_FLUSH, bio); | |
321 | ||
721bd4d5 GZ |
322 | llist_for_each_entry_safe(cmd, next, |
323 | fcc->dispatch_list, llnode) { | |
6b4afdd7 | 324 | cmd->ret = ret; |
6b4afdd7 JK |
325 | complete(&cmd->wait); |
326 | } | |
a4ed23f2 | 327 | bio_put(bio); |
a688b9d9 | 328 | fcc->dispatch_list = NULL; |
6b4afdd7 JK |
329 | } |
330 | ||
a688b9d9 | 331 | wait_event_interruptible(*q, |
721bd4d5 | 332 | kthread_should_stop() || !llist_empty(&fcc->issue_list)); |
6b4afdd7 JK |
333 | goto repeat; |
334 | } | |
335 | ||
336 | int f2fs_issue_flush(struct f2fs_sb_info *sbi) | |
337 | { | |
a688b9d9 | 338 | struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info; |
adf8d90b | 339 | struct flush_cmd cmd; |
6b4afdd7 | 340 | |
24a9ee0f JK |
341 | trace_f2fs_issue_flush(sbi->sb, test_opt(sbi, NOBARRIER), |
342 | test_opt(sbi, FLUSH_MERGE)); | |
343 | ||
0f7b2abd JK |
344 | if (test_opt(sbi, NOBARRIER)) |
345 | return 0; | |
346 | ||
6b4afdd7 JK |
347 | if (!test_opt(sbi, FLUSH_MERGE)) |
348 | return blkdev_issue_flush(sbi->sb->s_bdev, GFP_KERNEL, NULL); | |
349 | ||
adf8d90b | 350 | init_completion(&cmd.wait); |
6b4afdd7 | 351 | |
721bd4d5 | 352 | llist_add(&cmd.llnode, &fcc->issue_list); |
6b4afdd7 | 353 | |
a688b9d9 GZ |
354 | if (!fcc->dispatch_list) |
355 | wake_up(&fcc->flush_wait_queue); | |
6b4afdd7 | 356 | |
adf8d90b CY |
357 | wait_for_completion(&cmd.wait); |
358 | ||
359 | return cmd.ret; | |
6b4afdd7 JK |
360 | } |
361 | ||
2163d198 GZ |
362 | int create_flush_cmd_control(struct f2fs_sb_info *sbi) |
363 | { | |
364 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
365 | struct flush_cmd_control *fcc; | |
366 | int err = 0; | |
367 | ||
368 | fcc = kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL); | |
369 | if (!fcc) | |
370 | return -ENOMEM; | |
2163d198 | 371 | init_waitqueue_head(&fcc->flush_wait_queue); |
721bd4d5 | 372 | init_llist_head(&fcc->issue_list); |
6b2920a5 | 373 | SM_I(sbi)->cmd_control_info = fcc; |
2163d198 GZ |
374 | fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi, |
375 | "f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev)); | |
376 | if (IS_ERR(fcc->f2fs_issue_flush)) { | |
377 | err = PTR_ERR(fcc->f2fs_issue_flush); | |
378 | kfree(fcc); | |
6b2920a5 | 379 | SM_I(sbi)->cmd_control_info = NULL; |
2163d198 GZ |
380 | return err; |
381 | } | |
2163d198 GZ |
382 | |
383 | return err; | |
384 | } | |
385 | ||
386 | void destroy_flush_cmd_control(struct f2fs_sb_info *sbi) | |
387 | { | |
6b2920a5 | 388 | struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info; |
2163d198 GZ |
389 | |
390 | if (fcc && fcc->f2fs_issue_flush) | |
391 | kthread_stop(fcc->f2fs_issue_flush); | |
392 | kfree(fcc); | |
6b2920a5 | 393 | SM_I(sbi)->cmd_control_info = NULL; |
2163d198 GZ |
394 | } |
395 | ||
351df4b2 JK |
396 | static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, |
397 | enum dirty_type dirty_type) | |
398 | { | |
399 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
400 | ||
401 | /* need not be added */ | |
402 | if (IS_CURSEG(sbi, segno)) | |
403 | return; | |
404 | ||
405 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
406 | dirty_i->nr_dirty[dirty_type]++; | |
407 | ||
408 | if (dirty_type == DIRTY) { | |
409 | struct seg_entry *sentry = get_seg_entry(sbi, segno); | |
4625d6aa | 410 | enum dirty_type t = sentry->type; |
b2f2c390 | 411 | |
ec325b52 JK |
412 | if (unlikely(t >= DIRTY)) { |
413 | f2fs_bug_on(sbi, 1); | |
414 | return; | |
415 | } | |
4625d6aa CL |
416 | if (!test_and_set_bit(segno, dirty_i->dirty_segmap[t])) |
417 | dirty_i->nr_dirty[t]++; | |
351df4b2 JK |
418 | } |
419 | } | |
420 | ||
421 | static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno, | |
422 | enum dirty_type dirty_type) | |
423 | { | |
424 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
425 | ||
426 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type])) | |
427 | dirty_i->nr_dirty[dirty_type]--; | |
428 | ||
429 | if (dirty_type == DIRTY) { | |
4625d6aa CL |
430 | struct seg_entry *sentry = get_seg_entry(sbi, segno); |
431 | enum dirty_type t = sentry->type; | |
432 | ||
433 | if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t])) | |
434 | dirty_i->nr_dirty[t]--; | |
b2f2c390 | 435 | |
5ec4e49f JK |
436 | if (get_valid_blocks(sbi, segno, sbi->segs_per_sec) == 0) |
437 | clear_bit(GET_SECNO(sbi, segno), | |
438 | dirty_i->victim_secmap); | |
351df4b2 JK |
439 | } |
440 | } | |
441 | ||
0a8165d7 | 442 | /* |
351df4b2 JK |
443 | * Should not occur error such as -ENOMEM. |
444 | * Adding dirty entry into seglist is not critical operation. | |
445 | * If a given segment is one of current working segments, it won't be added. | |
446 | */ | |
8d8451af | 447 | static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno) |
351df4b2 JK |
448 | { |
449 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
450 | unsigned short valid_blocks; | |
451 | ||
452 | if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno)) | |
453 | return; | |
454 | ||
455 | mutex_lock(&dirty_i->seglist_lock); | |
456 | ||
457 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
458 | ||
459 | if (valid_blocks == 0) { | |
460 | __locate_dirty_segment(sbi, segno, PRE); | |
461 | __remove_dirty_segment(sbi, segno, DIRTY); | |
462 | } else if (valid_blocks < sbi->blocks_per_seg) { | |
463 | __locate_dirty_segment(sbi, segno, DIRTY); | |
464 | } else { | |
465 | /* Recovery routine with SSR needs this */ | |
466 | __remove_dirty_segment(sbi, segno, DIRTY); | |
467 | } | |
468 | ||
469 | mutex_unlock(&dirty_i->seglist_lock); | |
351df4b2 JK |
470 | } |
471 | ||
1e87a78d | 472 | static int f2fs_issue_discard(struct f2fs_sb_info *sbi, |
37208879 JK |
473 | block_t blkstart, block_t blklen) |
474 | { | |
55cf9cb6 CY |
475 | sector_t start = SECTOR_FROM_BLOCK(blkstart); |
476 | sector_t len = SECTOR_FROM_BLOCK(blklen); | |
1661d07c | 477 | trace_f2fs_issue_discard(sbi->sb, blkstart, blklen); |
1e87a78d JK |
478 | return blkdev_issue_discard(sbi->sb->s_bdev, start, len, GFP_NOFS, 0); |
479 | } | |
480 | ||
cf2271e7 | 481 | void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr) |
1e87a78d | 482 | { |
1e87a78d JK |
483 | if (f2fs_issue_discard(sbi, blkaddr, 1)) { |
484 | struct page *page = grab_meta_page(sbi, blkaddr); | |
485 | /* zero-filled page */ | |
486 | set_page_dirty(page); | |
487 | f2fs_put_page(page, 1); | |
488 | } | |
37208879 JK |
489 | } |
490 | ||
adf4983b JK |
491 | static void __add_discard_entry(struct f2fs_sb_info *sbi, |
492 | struct cp_control *cpc, unsigned int start, unsigned int end) | |
b2955550 JK |
493 | { |
494 | struct list_head *head = &SM_I(sbi)->discard_list; | |
adf4983b JK |
495 | struct discard_entry *new, *last; |
496 | ||
497 | if (!list_empty(head)) { | |
498 | last = list_last_entry(head, struct discard_entry, list); | |
499 | if (START_BLOCK(sbi, cpc->trim_start) + start == | |
500 | last->blkaddr + last->len) { | |
501 | last->len += end - start; | |
502 | goto done; | |
503 | } | |
504 | } | |
505 | ||
506 | new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS); | |
507 | INIT_LIST_HEAD(&new->list); | |
508 | new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start; | |
509 | new->len = end - start; | |
510 | list_add_tail(&new->list, head); | |
511 | done: | |
512 | SM_I(sbi)->nr_discards += end - start; | |
513 | cpc->trimmed += end - start; | |
514 | } | |
515 | ||
516 | static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc) | |
517 | { | |
b2955550 JK |
518 | int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); |
519 | int max_blocks = sbi->blocks_per_seg; | |
4b2fecc8 | 520 | struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start); |
b2955550 JK |
521 | unsigned long *cur_map = (unsigned long *)se->cur_valid_map; |
522 | unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; | |
523 | unsigned long dmap[entries]; | |
524 | unsigned int start = 0, end = -1; | |
4b2fecc8 | 525 | bool force = (cpc->reason == CP_DISCARD); |
b2955550 JK |
526 | int i; |
527 | ||
4b2fecc8 | 528 | if (!force && !test_opt(sbi, DISCARD)) |
b2955550 JK |
529 | return; |
530 | ||
4b2fecc8 JK |
531 | if (force && !se->valid_blocks) { |
532 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
533 | /* | |
534 | * if this segment is registered in the prefree list, then | |
535 | * we should skip adding a discard candidate, and let the | |
536 | * checkpoint do that later. | |
537 | */ | |
538 | mutex_lock(&dirty_i->seglist_lock); | |
539 | if (test_bit(cpc->trim_start, dirty_i->dirty_segmap[PRE])) { | |
540 | mutex_unlock(&dirty_i->seglist_lock); | |
541 | cpc->trimmed += sbi->blocks_per_seg; | |
542 | return; | |
543 | } | |
544 | mutex_unlock(&dirty_i->seglist_lock); | |
545 | ||
adf4983b | 546 | __add_discard_entry(sbi, cpc, 0, sbi->blocks_per_seg); |
4b2fecc8 JK |
547 | return; |
548 | } | |
549 | ||
b2955550 JK |
550 | /* zero block will be discarded through the prefree list */ |
551 | if (!se->valid_blocks || se->valid_blocks == max_blocks) | |
552 | return; | |
553 | ||
554 | /* SIT_VBLOCK_MAP_SIZE should be multiple of sizeof(unsigned long) */ | |
555 | for (i = 0; i < entries; i++) | |
e3fb1b79 | 556 | dmap[i] = ~(cur_map[i] | ckpt_map[i]); |
b2955550 | 557 | |
4b2fecc8 | 558 | while (force || SM_I(sbi)->nr_discards <= SM_I(sbi)->max_discards) { |
b2955550 JK |
559 | start = __find_rev_next_bit(dmap, max_blocks, end + 1); |
560 | if (start >= max_blocks) | |
561 | break; | |
562 | ||
563 | end = __find_rev_next_zero_bit(dmap, max_blocks, start + 1); | |
564 | ||
4b2fecc8 JK |
565 | if (end - start < cpc->trim_minlen) |
566 | continue; | |
567 | ||
adf4983b | 568 | __add_discard_entry(sbi, cpc, start, end); |
b2955550 JK |
569 | } |
570 | } | |
571 | ||
4b2fecc8 JK |
572 | void release_discard_addrs(struct f2fs_sb_info *sbi) |
573 | { | |
574 | struct list_head *head = &(SM_I(sbi)->discard_list); | |
575 | struct discard_entry *entry, *this; | |
576 | ||
577 | /* drop caches */ | |
578 | list_for_each_entry_safe(entry, this, head, list) { | |
579 | list_del(&entry->list); | |
580 | kmem_cache_free(discard_entry_slab, entry); | |
581 | } | |
582 | } | |
583 | ||
0a8165d7 | 584 | /* |
351df4b2 JK |
585 | * Should call clear_prefree_segments after checkpoint is done. |
586 | */ | |
587 | static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi) | |
588 | { | |
589 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
b65ee148 | 590 | unsigned int segno; |
351df4b2 JK |
591 | |
592 | mutex_lock(&dirty_i->seglist_lock); | |
7cd8558b | 593 | for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi)) |
351df4b2 | 594 | __set_test_and_free(sbi, segno); |
351df4b2 JK |
595 | mutex_unlock(&dirty_i->seglist_lock); |
596 | } | |
597 | ||
598 | void clear_prefree_segments(struct f2fs_sb_info *sbi) | |
599 | { | |
b2955550 | 600 | struct list_head *head = &(SM_I(sbi)->discard_list); |
2d7b822a | 601 | struct discard_entry *entry, *this; |
351df4b2 | 602 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); |
29e59c14 | 603 | unsigned long *prefree_map = dirty_i->dirty_segmap[PRE]; |
29e59c14 | 604 | unsigned int start = 0, end = -1; |
351df4b2 JK |
605 | |
606 | mutex_lock(&dirty_i->seglist_lock); | |
29e59c14 | 607 | |
351df4b2 | 608 | while (1) { |
29e59c14 | 609 | int i; |
7cd8558b JK |
610 | start = find_next_bit(prefree_map, MAIN_SEGS(sbi), end + 1); |
611 | if (start >= MAIN_SEGS(sbi)) | |
351df4b2 | 612 | break; |
7cd8558b JK |
613 | end = find_next_zero_bit(prefree_map, MAIN_SEGS(sbi), |
614 | start + 1); | |
29e59c14 CL |
615 | |
616 | for (i = start; i < end; i++) | |
617 | clear_bit(i, prefree_map); | |
618 | ||
619 | dirty_i->nr_dirty[PRE] -= end - start; | |
620 | ||
621 | if (!test_opt(sbi, DISCARD)) | |
622 | continue; | |
351df4b2 | 623 | |
37208879 JK |
624 | f2fs_issue_discard(sbi, START_BLOCK(sbi, start), |
625 | (end - start) << sbi->log_blocks_per_seg); | |
351df4b2 JK |
626 | } |
627 | mutex_unlock(&dirty_i->seglist_lock); | |
b2955550 JK |
628 | |
629 | /* send small discards */ | |
2d7b822a | 630 | list_for_each_entry_safe(entry, this, head, list) { |
37208879 | 631 | f2fs_issue_discard(sbi, entry->blkaddr, entry->len); |
b2955550 JK |
632 | list_del(&entry->list); |
633 | SM_I(sbi)->nr_discards -= entry->len; | |
634 | kmem_cache_free(discard_entry_slab, entry); | |
635 | } | |
351df4b2 JK |
636 | } |
637 | ||
184a5cd2 | 638 | static bool __mark_sit_entry_dirty(struct f2fs_sb_info *sbi, unsigned int segno) |
351df4b2 JK |
639 | { |
640 | struct sit_info *sit_i = SIT_I(sbi); | |
184a5cd2 CY |
641 | |
642 | if (!__test_and_set_bit(segno, sit_i->dirty_sentries_bitmap)) { | |
351df4b2 | 643 | sit_i->dirty_sentries++; |
184a5cd2 CY |
644 | return false; |
645 | } | |
646 | ||
647 | return true; | |
351df4b2 JK |
648 | } |
649 | ||
650 | static void __set_sit_entry_type(struct f2fs_sb_info *sbi, int type, | |
651 | unsigned int segno, int modified) | |
652 | { | |
653 | struct seg_entry *se = get_seg_entry(sbi, segno); | |
654 | se->type = type; | |
655 | if (modified) | |
656 | __mark_sit_entry_dirty(sbi, segno); | |
657 | } | |
658 | ||
659 | static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del) | |
660 | { | |
661 | struct seg_entry *se; | |
662 | unsigned int segno, offset; | |
663 | long int new_vblocks; | |
664 | ||
665 | segno = GET_SEGNO(sbi, blkaddr); | |
666 | ||
667 | se = get_seg_entry(sbi, segno); | |
668 | new_vblocks = se->valid_blocks + del; | |
491c0854 | 669 | offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr); |
351df4b2 | 670 | |
9850cf4a | 671 | f2fs_bug_on(sbi, (new_vblocks >> (sizeof(unsigned short) << 3) || |
351df4b2 JK |
672 | (new_vblocks > sbi->blocks_per_seg))); |
673 | ||
674 | se->valid_blocks = new_vblocks; | |
675 | se->mtime = get_mtime(sbi); | |
676 | SIT_I(sbi)->max_mtime = se->mtime; | |
677 | ||
678 | /* Update valid block bitmap */ | |
679 | if (del > 0) { | |
52aca074 | 680 | if (f2fs_test_and_set_bit(offset, se->cur_valid_map)) |
05796763 | 681 | f2fs_bug_on(sbi, 1); |
351df4b2 | 682 | } else { |
52aca074 | 683 | if (!f2fs_test_and_clear_bit(offset, se->cur_valid_map)) |
05796763 | 684 | f2fs_bug_on(sbi, 1); |
351df4b2 JK |
685 | } |
686 | if (!f2fs_test_bit(offset, se->ckpt_valid_map)) | |
687 | se->ckpt_valid_blocks += del; | |
688 | ||
689 | __mark_sit_entry_dirty(sbi, segno); | |
690 | ||
691 | /* update total number of valid blocks to be written in ckpt area */ | |
692 | SIT_I(sbi)->written_valid_blocks += del; | |
693 | ||
694 | if (sbi->segs_per_sec > 1) | |
695 | get_sec_entry(sbi, segno)->valid_blocks += del; | |
696 | } | |
697 | ||
5e443818 | 698 | void refresh_sit_entry(struct f2fs_sb_info *sbi, block_t old, block_t new) |
351df4b2 | 699 | { |
5e443818 JK |
700 | update_sit_entry(sbi, new, 1); |
701 | if (GET_SEGNO(sbi, old) != NULL_SEGNO) | |
702 | update_sit_entry(sbi, old, -1); | |
703 | ||
704 | locate_dirty_segment(sbi, GET_SEGNO(sbi, old)); | |
705 | locate_dirty_segment(sbi, GET_SEGNO(sbi, new)); | |
351df4b2 JK |
706 | } |
707 | ||
708 | void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr) | |
709 | { | |
710 | unsigned int segno = GET_SEGNO(sbi, addr); | |
711 | struct sit_info *sit_i = SIT_I(sbi); | |
712 | ||
9850cf4a | 713 | f2fs_bug_on(sbi, addr == NULL_ADDR); |
351df4b2 JK |
714 | if (addr == NEW_ADDR) |
715 | return; | |
716 | ||
717 | /* add it into sit main buffer */ | |
718 | mutex_lock(&sit_i->sentry_lock); | |
719 | ||
720 | update_sit_entry(sbi, addr, -1); | |
721 | ||
722 | /* add it into dirty seglist */ | |
723 | locate_dirty_segment(sbi, segno); | |
724 | ||
725 | mutex_unlock(&sit_i->sentry_lock); | |
726 | } | |
727 | ||
0a8165d7 | 728 | /* |
351df4b2 JK |
729 | * This function should be resided under the curseg_mutex lock |
730 | */ | |
731 | static void __add_sum_entry(struct f2fs_sb_info *sbi, int type, | |
e79efe3b | 732 | struct f2fs_summary *sum) |
351df4b2 JK |
733 | { |
734 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
735 | void *addr = curseg->sum_blk; | |
e79efe3b | 736 | addr += curseg->next_blkoff * sizeof(struct f2fs_summary); |
351df4b2 | 737 | memcpy(addr, sum, sizeof(struct f2fs_summary)); |
351df4b2 JK |
738 | } |
739 | ||
0a8165d7 | 740 | /* |
351df4b2 JK |
741 | * Calculate the number of current summary pages for writing |
742 | */ | |
743 | int npages_for_summary_flush(struct f2fs_sb_info *sbi) | |
744 | { | |
351df4b2 | 745 | int valid_sum_count = 0; |
9a47938b | 746 | int i, sum_in_page; |
351df4b2 JK |
747 | |
748 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
749 | if (sbi->ckpt->alloc_type[i] == SSR) | |
750 | valid_sum_count += sbi->blocks_per_seg; | |
751 | else | |
752 | valid_sum_count += curseg_blkoff(sbi, i); | |
753 | } | |
754 | ||
9a47938b FL |
755 | sum_in_page = (PAGE_CACHE_SIZE - 2 * SUM_JOURNAL_SIZE - |
756 | SUM_FOOTER_SIZE) / SUMMARY_SIZE; | |
757 | if (valid_sum_count <= sum_in_page) | |
351df4b2 | 758 | return 1; |
9a47938b FL |
759 | else if ((valid_sum_count - sum_in_page) <= |
760 | (PAGE_CACHE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE) | |
351df4b2 JK |
761 | return 2; |
762 | return 3; | |
763 | } | |
764 | ||
0a8165d7 | 765 | /* |
351df4b2 JK |
766 | * Caller should put this summary page |
767 | */ | |
768 | struct page *get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno) | |
769 | { | |
770 | return get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno)); | |
771 | } | |
772 | ||
773 | static void write_sum_page(struct f2fs_sb_info *sbi, | |
774 | struct f2fs_summary_block *sum_blk, block_t blk_addr) | |
775 | { | |
776 | struct page *page = grab_meta_page(sbi, blk_addr); | |
777 | void *kaddr = page_address(page); | |
778 | memcpy(kaddr, sum_blk, PAGE_CACHE_SIZE); | |
779 | set_page_dirty(page); | |
780 | f2fs_put_page(page, 1); | |
781 | } | |
782 | ||
60374688 JK |
783 | static int is_next_segment_free(struct f2fs_sb_info *sbi, int type) |
784 | { | |
785 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
81fb5e87 | 786 | unsigned int segno = curseg->segno + 1; |
60374688 JK |
787 | struct free_segmap_info *free_i = FREE_I(sbi); |
788 | ||
7cd8558b | 789 | if (segno < MAIN_SEGS(sbi) && segno % sbi->segs_per_sec) |
81fb5e87 | 790 | return !test_bit(segno, free_i->free_segmap); |
60374688 JK |
791 | return 0; |
792 | } | |
793 | ||
0a8165d7 | 794 | /* |
351df4b2 JK |
795 | * Find a new segment from the free segments bitmap to right order |
796 | * This function should be returned with success, otherwise BUG | |
797 | */ | |
798 | static void get_new_segment(struct f2fs_sb_info *sbi, | |
799 | unsigned int *newseg, bool new_sec, int dir) | |
800 | { | |
801 | struct free_segmap_info *free_i = FREE_I(sbi); | |
351df4b2 | 802 | unsigned int segno, secno, zoneno; |
7cd8558b | 803 | unsigned int total_zones = MAIN_SECS(sbi) / sbi->secs_per_zone; |
351df4b2 JK |
804 | unsigned int hint = *newseg / sbi->segs_per_sec; |
805 | unsigned int old_zoneno = GET_ZONENO_FROM_SEGNO(sbi, *newseg); | |
806 | unsigned int left_start = hint; | |
807 | bool init = true; | |
808 | int go_left = 0; | |
809 | int i; | |
810 | ||
811 | write_lock(&free_i->segmap_lock); | |
812 | ||
813 | if (!new_sec && ((*newseg + 1) % sbi->segs_per_sec)) { | |
814 | segno = find_next_zero_bit(free_i->free_segmap, | |
7cd8558b | 815 | MAIN_SEGS(sbi), *newseg + 1); |
33afa7fd JK |
816 | if (segno - *newseg < sbi->segs_per_sec - |
817 | (*newseg % sbi->segs_per_sec)) | |
351df4b2 JK |
818 | goto got_it; |
819 | } | |
820 | find_other_zone: | |
7cd8558b JK |
821 | secno = find_next_zero_bit(free_i->free_secmap, MAIN_SECS(sbi), hint); |
822 | if (secno >= MAIN_SECS(sbi)) { | |
351df4b2 JK |
823 | if (dir == ALLOC_RIGHT) { |
824 | secno = find_next_zero_bit(free_i->free_secmap, | |
7cd8558b JK |
825 | MAIN_SECS(sbi), 0); |
826 | f2fs_bug_on(sbi, secno >= MAIN_SECS(sbi)); | |
351df4b2 JK |
827 | } else { |
828 | go_left = 1; | |
829 | left_start = hint - 1; | |
830 | } | |
831 | } | |
832 | if (go_left == 0) | |
833 | goto skip_left; | |
834 | ||
835 | while (test_bit(left_start, free_i->free_secmap)) { | |
836 | if (left_start > 0) { | |
837 | left_start--; | |
838 | continue; | |
839 | } | |
840 | left_start = find_next_zero_bit(free_i->free_secmap, | |
7cd8558b JK |
841 | MAIN_SECS(sbi), 0); |
842 | f2fs_bug_on(sbi, left_start >= MAIN_SECS(sbi)); | |
351df4b2 JK |
843 | break; |
844 | } | |
845 | secno = left_start; | |
846 | skip_left: | |
847 | hint = secno; | |
848 | segno = secno * sbi->segs_per_sec; | |
849 | zoneno = secno / sbi->secs_per_zone; | |
850 | ||
851 | /* give up on finding another zone */ | |
852 | if (!init) | |
853 | goto got_it; | |
854 | if (sbi->secs_per_zone == 1) | |
855 | goto got_it; | |
856 | if (zoneno == old_zoneno) | |
857 | goto got_it; | |
858 | if (dir == ALLOC_LEFT) { | |
859 | if (!go_left && zoneno + 1 >= total_zones) | |
860 | goto got_it; | |
861 | if (go_left && zoneno == 0) | |
862 | goto got_it; | |
863 | } | |
864 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
865 | if (CURSEG_I(sbi, i)->zone == zoneno) | |
866 | break; | |
867 | ||
868 | if (i < NR_CURSEG_TYPE) { | |
869 | /* zone is in user, try another */ | |
870 | if (go_left) | |
871 | hint = zoneno * sbi->secs_per_zone - 1; | |
872 | else if (zoneno + 1 >= total_zones) | |
873 | hint = 0; | |
874 | else | |
875 | hint = (zoneno + 1) * sbi->secs_per_zone; | |
876 | init = false; | |
877 | goto find_other_zone; | |
878 | } | |
879 | got_it: | |
880 | /* set it as dirty segment in free segmap */ | |
9850cf4a | 881 | f2fs_bug_on(sbi, test_bit(segno, free_i->free_segmap)); |
351df4b2 JK |
882 | __set_inuse(sbi, segno); |
883 | *newseg = segno; | |
884 | write_unlock(&free_i->segmap_lock); | |
885 | } | |
886 | ||
887 | static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified) | |
888 | { | |
889 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
890 | struct summary_footer *sum_footer; | |
891 | ||
892 | curseg->segno = curseg->next_segno; | |
893 | curseg->zone = GET_ZONENO_FROM_SEGNO(sbi, curseg->segno); | |
894 | curseg->next_blkoff = 0; | |
895 | curseg->next_segno = NULL_SEGNO; | |
896 | ||
897 | sum_footer = &(curseg->sum_blk->footer); | |
898 | memset(sum_footer, 0, sizeof(struct summary_footer)); | |
899 | if (IS_DATASEG(type)) | |
900 | SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA); | |
901 | if (IS_NODESEG(type)) | |
902 | SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE); | |
903 | __set_sit_entry_type(sbi, type, curseg->segno, modified); | |
904 | } | |
905 | ||
0a8165d7 | 906 | /* |
351df4b2 JK |
907 | * Allocate a current working segment. |
908 | * This function always allocates a free segment in LFS manner. | |
909 | */ | |
910 | static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec) | |
911 | { | |
912 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
913 | unsigned int segno = curseg->segno; | |
914 | int dir = ALLOC_LEFT; | |
915 | ||
916 | write_sum_page(sbi, curseg->sum_blk, | |
81fb5e87 | 917 | GET_SUM_BLOCK(sbi, segno)); |
351df4b2 JK |
918 | if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA) |
919 | dir = ALLOC_RIGHT; | |
920 | ||
921 | if (test_opt(sbi, NOHEAP)) | |
922 | dir = ALLOC_RIGHT; | |
923 | ||
924 | get_new_segment(sbi, &segno, new_sec, dir); | |
925 | curseg->next_segno = segno; | |
926 | reset_curseg(sbi, type, 1); | |
927 | curseg->alloc_type = LFS; | |
928 | } | |
929 | ||
930 | static void __next_free_blkoff(struct f2fs_sb_info *sbi, | |
931 | struct curseg_info *seg, block_t start) | |
932 | { | |
933 | struct seg_entry *se = get_seg_entry(sbi, seg->segno); | |
e81c93cf CL |
934 | int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long); |
935 | unsigned long target_map[entries]; | |
936 | unsigned long *ckpt_map = (unsigned long *)se->ckpt_valid_map; | |
937 | unsigned long *cur_map = (unsigned long *)se->cur_valid_map; | |
938 | int i, pos; | |
939 | ||
940 | for (i = 0; i < entries; i++) | |
941 | target_map[i] = ckpt_map[i] | cur_map[i]; | |
942 | ||
943 | pos = __find_rev_next_zero_bit(target_map, sbi->blocks_per_seg, start); | |
944 | ||
945 | seg->next_blkoff = pos; | |
351df4b2 JK |
946 | } |
947 | ||
0a8165d7 | 948 | /* |
351df4b2 JK |
949 | * If a segment is written by LFS manner, next block offset is just obtained |
950 | * by increasing the current block offset. However, if a segment is written by | |
951 | * SSR manner, next block offset obtained by calling __next_free_blkoff | |
952 | */ | |
953 | static void __refresh_next_blkoff(struct f2fs_sb_info *sbi, | |
954 | struct curseg_info *seg) | |
955 | { | |
956 | if (seg->alloc_type == SSR) | |
957 | __next_free_blkoff(sbi, seg, seg->next_blkoff + 1); | |
958 | else | |
959 | seg->next_blkoff++; | |
960 | } | |
961 | ||
0a8165d7 | 962 | /* |
e1c42045 | 963 | * This function always allocates a used segment(from dirty seglist) by SSR |
351df4b2 JK |
964 | * manner, so it should recover the existing segment information of valid blocks |
965 | */ | |
966 | static void change_curseg(struct f2fs_sb_info *sbi, int type, bool reuse) | |
967 | { | |
968 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
969 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
970 | unsigned int new_segno = curseg->next_segno; | |
971 | struct f2fs_summary_block *sum_node; | |
972 | struct page *sum_page; | |
973 | ||
974 | write_sum_page(sbi, curseg->sum_blk, | |
975 | GET_SUM_BLOCK(sbi, curseg->segno)); | |
976 | __set_test_and_inuse(sbi, new_segno); | |
977 | ||
978 | mutex_lock(&dirty_i->seglist_lock); | |
979 | __remove_dirty_segment(sbi, new_segno, PRE); | |
980 | __remove_dirty_segment(sbi, new_segno, DIRTY); | |
981 | mutex_unlock(&dirty_i->seglist_lock); | |
982 | ||
983 | reset_curseg(sbi, type, 1); | |
984 | curseg->alloc_type = SSR; | |
985 | __next_free_blkoff(sbi, curseg, 0); | |
986 | ||
987 | if (reuse) { | |
988 | sum_page = get_sum_page(sbi, new_segno); | |
989 | sum_node = (struct f2fs_summary_block *)page_address(sum_page); | |
990 | memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE); | |
991 | f2fs_put_page(sum_page, 1); | |
992 | } | |
993 | } | |
994 | ||
43727527 JK |
995 | static int get_ssr_segment(struct f2fs_sb_info *sbi, int type) |
996 | { | |
997 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
998 | const struct victim_selection *v_ops = DIRTY_I(sbi)->v_ops; | |
999 | ||
1000 | if (IS_NODESEG(type) || !has_not_enough_free_secs(sbi, 0)) | |
1001 | return v_ops->get_victim(sbi, | |
1002 | &(curseg)->next_segno, BG_GC, type, SSR); | |
1003 | ||
1004 | /* For data segments, let's do SSR more intensively */ | |
1005 | for (; type >= CURSEG_HOT_DATA; type--) | |
1006 | if (v_ops->get_victim(sbi, &(curseg)->next_segno, | |
1007 | BG_GC, type, SSR)) | |
1008 | return 1; | |
1009 | return 0; | |
1010 | } | |
1011 | ||
351df4b2 JK |
1012 | /* |
1013 | * flush out current segment and replace it with new segment | |
1014 | * This function should be returned with success, otherwise BUG | |
1015 | */ | |
1016 | static void allocate_segment_by_default(struct f2fs_sb_info *sbi, | |
1017 | int type, bool force) | |
1018 | { | |
1019 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
351df4b2 | 1020 | |
7b405275 | 1021 | if (force) |
351df4b2 | 1022 | new_curseg(sbi, type, true); |
7b405275 | 1023 | else if (type == CURSEG_WARM_NODE) |
351df4b2 | 1024 | new_curseg(sbi, type, false); |
60374688 JK |
1025 | else if (curseg->alloc_type == LFS && is_next_segment_free(sbi, type)) |
1026 | new_curseg(sbi, type, false); | |
351df4b2 JK |
1027 | else if (need_SSR(sbi) && get_ssr_segment(sbi, type)) |
1028 | change_curseg(sbi, type, true); | |
1029 | else | |
1030 | new_curseg(sbi, type, false); | |
dcdfff65 JK |
1031 | |
1032 | stat_inc_seg_type(sbi, curseg); | |
351df4b2 JK |
1033 | } |
1034 | ||
1035 | void allocate_new_segments(struct f2fs_sb_info *sbi) | |
1036 | { | |
1037 | struct curseg_info *curseg; | |
1038 | unsigned int old_curseg; | |
1039 | int i; | |
1040 | ||
1041 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1042 | curseg = CURSEG_I(sbi, i); | |
1043 | old_curseg = curseg->segno; | |
1044 | SIT_I(sbi)->s_ops->allocate_segment(sbi, i, true); | |
1045 | locate_dirty_segment(sbi, old_curseg); | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | static const struct segment_allocation default_salloc_ops = { | |
1050 | .allocate_segment = allocate_segment_by_default, | |
1051 | }; | |
1052 | ||
4b2fecc8 JK |
1053 | int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range) |
1054 | { | |
4b2fecc8 JK |
1055 | __u64 start = range->start >> sbi->log_blocksize; |
1056 | __u64 end = start + (range->len >> sbi->log_blocksize) - 1; | |
4b2fecc8 JK |
1057 | unsigned int start_segno, end_segno; |
1058 | struct cp_control cpc; | |
1059 | ||
7cd8558b JK |
1060 | if (range->minlen > SEGMENT_SIZE(sbi) || start >= MAX_BLKADDR(sbi) || |
1061 | range->len < sbi->blocksize) | |
4b2fecc8 JK |
1062 | return -EINVAL; |
1063 | ||
9bd27ae4 | 1064 | cpc.trimmed = 0; |
7cd8558b | 1065 | if (end <= MAIN_BLKADDR(sbi)) |
4b2fecc8 JK |
1066 | goto out; |
1067 | ||
1068 | /* start/end segment number in main_area */ | |
7cd8558b JK |
1069 | start_segno = (start <= MAIN_BLKADDR(sbi)) ? 0 : GET_SEGNO(sbi, start); |
1070 | end_segno = (end >= MAX_BLKADDR(sbi)) ? MAIN_SEGS(sbi) - 1 : | |
1071 | GET_SEGNO(sbi, end); | |
4b2fecc8 JK |
1072 | cpc.reason = CP_DISCARD; |
1073 | cpc.trim_start = start_segno; | |
1074 | cpc.trim_end = end_segno; | |
1075 | cpc.trim_minlen = range->minlen >> sbi->log_blocksize; | |
4b2fecc8 JK |
1076 | |
1077 | /* do checkpoint to issue discard commands safely */ | |
ca4b02ee | 1078 | mutex_lock(&sbi->gc_mutex); |
4b2fecc8 | 1079 | write_checkpoint(sbi, &cpc); |
ca4b02ee | 1080 | mutex_unlock(&sbi->gc_mutex); |
4b2fecc8 JK |
1081 | out: |
1082 | range->len = cpc.trimmed << sbi->log_blocksize; | |
1083 | return 0; | |
1084 | } | |
1085 | ||
351df4b2 JK |
1086 | static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type) |
1087 | { | |
1088 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
1089 | if (curseg->next_blkoff < sbi->blocks_per_seg) | |
1090 | return true; | |
1091 | return false; | |
1092 | } | |
1093 | ||
1094 | static int __get_segment_type_2(struct page *page, enum page_type p_type) | |
1095 | { | |
1096 | if (p_type == DATA) | |
1097 | return CURSEG_HOT_DATA; | |
1098 | else | |
1099 | return CURSEG_HOT_NODE; | |
1100 | } | |
1101 | ||
1102 | static int __get_segment_type_4(struct page *page, enum page_type p_type) | |
1103 | { | |
1104 | if (p_type == DATA) { | |
1105 | struct inode *inode = page->mapping->host; | |
1106 | ||
1107 | if (S_ISDIR(inode->i_mode)) | |
1108 | return CURSEG_HOT_DATA; | |
1109 | else | |
1110 | return CURSEG_COLD_DATA; | |
1111 | } else { | |
a344b9fd JK |
1112 | if (IS_DNODE(page) && is_cold_node(page)) |
1113 | return CURSEG_WARM_NODE; | |
351df4b2 JK |
1114 | else |
1115 | return CURSEG_COLD_NODE; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | static int __get_segment_type_6(struct page *page, enum page_type p_type) | |
1120 | { | |
1121 | if (p_type == DATA) { | |
1122 | struct inode *inode = page->mapping->host; | |
1123 | ||
1124 | if (S_ISDIR(inode->i_mode)) | |
1125 | return CURSEG_HOT_DATA; | |
354a3399 | 1126 | else if (is_cold_data(page) || file_is_cold(inode)) |
351df4b2 JK |
1127 | return CURSEG_COLD_DATA; |
1128 | else | |
1129 | return CURSEG_WARM_DATA; | |
1130 | } else { | |
1131 | if (IS_DNODE(page)) | |
1132 | return is_cold_node(page) ? CURSEG_WARM_NODE : | |
1133 | CURSEG_HOT_NODE; | |
1134 | else | |
1135 | return CURSEG_COLD_NODE; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | static int __get_segment_type(struct page *page, enum page_type p_type) | |
1140 | { | |
4081363f | 1141 | switch (F2FS_P_SB(page)->active_logs) { |
351df4b2 JK |
1142 | case 2: |
1143 | return __get_segment_type_2(page, p_type); | |
1144 | case 4: | |
1145 | return __get_segment_type_4(page, p_type); | |
351df4b2 | 1146 | } |
12a67146 | 1147 | /* NR_CURSEG_TYPE(6) logs by default */ |
9850cf4a JK |
1148 | f2fs_bug_on(F2FS_P_SB(page), |
1149 | F2FS_P_SB(page)->active_logs != NR_CURSEG_TYPE); | |
12a67146 | 1150 | return __get_segment_type_6(page, p_type); |
351df4b2 JK |
1151 | } |
1152 | ||
bfad7c2d JK |
1153 | void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page, |
1154 | block_t old_blkaddr, block_t *new_blkaddr, | |
1155 | struct f2fs_summary *sum, int type) | |
351df4b2 JK |
1156 | { |
1157 | struct sit_info *sit_i = SIT_I(sbi); | |
1158 | struct curseg_info *curseg; | |
351df4b2 | 1159 | |
351df4b2 JK |
1160 | curseg = CURSEG_I(sbi, type); |
1161 | ||
1162 | mutex_lock(&curseg->curseg_mutex); | |
1163 | ||
1164 | *new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg); | |
351df4b2 JK |
1165 | |
1166 | /* | |
1167 | * __add_sum_entry should be resided under the curseg_mutex | |
1168 | * because, this function updates a summary entry in the | |
1169 | * current summary block. | |
1170 | */ | |
e79efe3b | 1171 | __add_sum_entry(sbi, type, sum); |
351df4b2 JK |
1172 | |
1173 | mutex_lock(&sit_i->sentry_lock); | |
1174 | __refresh_next_blkoff(sbi, curseg); | |
dcdfff65 JK |
1175 | |
1176 | stat_inc_block_count(sbi, curseg); | |
351df4b2 | 1177 | |
5e443818 JK |
1178 | if (!__has_curseg_space(sbi, type)) |
1179 | sit_i->s_ops->allocate_segment(sbi, type, false); | |
351df4b2 JK |
1180 | /* |
1181 | * SIT information should be updated before segment allocation, | |
1182 | * since SSR needs latest valid block information. | |
1183 | */ | |
1184 | refresh_sit_entry(sbi, old_blkaddr, *new_blkaddr); | |
5e443818 | 1185 | |
351df4b2 JK |
1186 | mutex_unlock(&sit_i->sentry_lock); |
1187 | ||
bfad7c2d | 1188 | if (page && IS_NODESEG(type)) |
351df4b2 JK |
1189 | fill_node_footer_blkaddr(page, NEXT_FREE_BLKADDR(sbi, curseg)); |
1190 | ||
bfad7c2d JK |
1191 | mutex_unlock(&curseg->curseg_mutex); |
1192 | } | |
1193 | ||
1194 | static void do_write_page(struct f2fs_sb_info *sbi, struct page *page, | |
1195 | block_t old_blkaddr, block_t *new_blkaddr, | |
1196 | struct f2fs_summary *sum, struct f2fs_io_info *fio) | |
1197 | { | |
1198 | int type = __get_segment_type(page, fio->type); | |
1199 | ||
1200 | allocate_data_block(sbi, page, old_blkaddr, new_blkaddr, sum, type); | |
1201 | ||
351df4b2 | 1202 | /* writeout dirty page into bdev */ |
458e6197 | 1203 | f2fs_submit_page_mbio(sbi, page, *new_blkaddr, fio); |
351df4b2 JK |
1204 | } |
1205 | ||
577e3495 | 1206 | void write_meta_page(struct f2fs_sb_info *sbi, struct page *page) |
351df4b2 | 1207 | { |
458e6197 JK |
1208 | struct f2fs_io_info fio = { |
1209 | .type = META, | |
7e8f2308 | 1210 | .rw = WRITE_SYNC | REQ_META | REQ_PRIO |
458e6197 JK |
1211 | }; |
1212 | ||
351df4b2 | 1213 | set_page_writeback(page); |
458e6197 | 1214 | f2fs_submit_page_mbio(sbi, page, page->index, &fio); |
351df4b2 JK |
1215 | } |
1216 | ||
1217 | void write_node_page(struct f2fs_sb_info *sbi, struct page *page, | |
fb5566da | 1218 | struct f2fs_io_info *fio, |
351df4b2 JK |
1219 | unsigned int nid, block_t old_blkaddr, block_t *new_blkaddr) |
1220 | { | |
1221 | struct f2fs_summary sum; | |
1222 | set_summary(&sum, nid, 0, 0); | |
fb5566da | 1223 | do_write_page(sbi, page, old_blkaddr, new_blkaddr, &sum, fio); |
351df4b2 JK |
1224 | } |
1225 | ||
458e6197 JK |
1226 | void write_data_page(struct page *page, struct dnode_of_data *dn, |
1227 | block_t *new_blkaddr, struct f2fs_io_info *fio) | |
351df4b2 | 1228 | { |
4081363f | 1229 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
351df4b2 JK |
1230 | struct f2fs_summary sum; |
1231 | struct node_info ni; | |
1232 | ||
9850cf4a | 1233 | f2fs_bug_on(sbi, dn->data_blkaddr == NULL_ADDR); |
351df4b2 JK |
1234 | get_node_info(sbi, dn->nid, &ni); |
1235 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
1236 | ||
458e6197 | 1237 | do_write_page(sbi, page, dn->data_blkaddr, new_blkaddr, &sum, fio); |
351df4b2 JK |
1238 | } |
1239 | ||
6c311ec6 CF |
1240 | void rewrite_data_page(struct page *page, block_t old_blkaddr, |
1241 | struct f2fs_io_info *fio) | |
351df4b2 | 1242 | { |
4081363f | 1243 | f2fs_submit_page_mbio(F2FS_P_SB(page), page, old_blkaddr, fio); |
351df4b2 JK |
1244 | } |
1245 | ||
1246 | void recover_data_page(struct f2fs_sb_info *sbi, | |
1247 | struct page *page, struct f2fs_summary *sum, | |
1248 | block_t old_blkaddr, block_t new_blkaddr) | |
1249 | { | |
1250 | struct sit_info *sit_i = SIT_I(sbi); | |
1251 | struct curseg_info *curseg; | |
1252 | unsigned int segno, old_cursegno; | |
1253 | struct seg_entry *se; | |
1254 | int type; | |
1255 | ||
1256 | segno = GET_SEGNO(sbi, new_blkaddr); | |
1257 | se = get_seg_entry(sbi, segno); | |
1258 | type = se->type; | |
1259 | ||
1260 | if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) { | |
1261 | if (old_blkaddr == NULL_ADDR) | |
1262 | type = CURSEG_COLD_DATA; | |
1263 | else | |
1264 | type = CURSEG_WARM_DATA; | |
1265 | } | |
1266 | curseg = CURSEG_I(sbi, type); | |
1267 | ||
1268 | mutex_lock(&curseg->curseg_mutex); | |
1269 | mutex_lock(&sit_i->sentry_lock); | |
1270 | ||
1271 | old_cursegno = curseg->segno; | |
1272 | ||
1273 | /* change the current segment */ | |
1274 | if (segno != curseg->segno) { | |
1275 | curseg->next_segno = segno; | |
1276 | change_curseg(sbi, type, true); | |
1277 | } | |
1278 | ||
491c0854 | 1279 | curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr); |
e79efe3b | 1280 | __add_sum_entry(sbi, type, sum); |
351df4b2 JK |
1281 | |
1282 | refresh_sit_entry(sbi, old_blkaddr, new_blkaddr); | |
351df4b2 | 1283 | locate_dirty_segment(sbi, old_cursegno); |
351df4b2 JK |
1284 | |
1285 | mutex_unlock(&sit_i->sentry_lock); | |
1286 | mutex_unlock(&curseg->curseg_mutex); | |
1287 | } | |
1288 | ||
df0f8dc0 CY |
1289 | static inline bool is_merged_page(struct f2fs_sb_info *sbi, |
1290 | struct page *page, enum page_type type) | |
1291 | { | |
1292 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
1293 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
df0f8dc0 CY |
1294 | struct bio_vec *bvec; |
1295 | int i; | |
1296 | ||
1297 | down_read(&io->io_rwsem); | |
ce23447f | 1298 | if (!io->bio) |
df0f8dc0 CY |
1299 | goto out; |
1300 | ||
ce23447f | 1301 | bio_for_each_segment_all(bvec, io->bio, i) { |
df0f8dc0 CY |
1302 | if (page == bvec->bv_page) { |
1303 | up_read(&io->io_rwsem); | |
1304 | return true; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | out: | |
1309 | up_read(&io->io_rwsem); | |
1310 | return false; | |
1311 | } | |
1312 | ||
93dfe2ac | 1313 | void f2fs_wait_on_page_writeback(struct page *page, |
5514f0aa | 1314 | enum page_type type) |
93dfe2ac | 1315 | { |
93dfe2ac | 1316 | if (PageWriteback(page)) { |
4081363f JK |
1317 | struct f2fs_sb_info *sbi = F2FS_P_SB(page); |
1318 | ||
df0f8dc0 CY |
1319 | if (is_merged_page(sbi, page, type)) |
1320 | f2fs_submit_merged_bio(sbi, type, WRITE); | |
93dfe2ac JK |
1321 | wait_on_page_writeback(page); |
1322 | } | |
1323 | } | |
1324 | ||
351df4b2 JK |
1325 | static int read_compacted_summaries(struct f2fs_sb_info *sbi) |
1326 | { | |
1327 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1328 | struct curseg_info *seg_i; | |
1329 | unsigned char *kaddr; | |
1330 | struct page *page; | |
1331 | block_t start; | |
1332 | int i, j, offset; | |
1333 | ||
1334 | start = start_sum_block(sbi); | |
1335 | ||
1336 | page = get_meta_page(sbi, start++); | |
1337 | kaddr = (unsigned char *)page_address(page); | |
1338 | ||
1339 | /* Step 1: restore nat cache */ | |
1340 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1341 | memcpy(&seg_i->sum_blk->n_nats, kaddr, SUM_JOURNAL_SIZE); | |
1342 | ||
1343 | /* Step 2: restore sit cache */ | |
1344 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1345 | memcpy(&seg_i->sum_blk->n_sits, kaddr + SUM_JOURNAL_SIZE, | |
1346 | SUM_JOURNAL_SIZE); | |
1347 | offset = 2 * SUM_JOURNAL_SIZE; | |
1348 | ||
1349 | /* Step 3: restore summary entries */ | |
1350 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1351 | unsigned short blk_off; | |
1352 | unsigned int segno; | |
1353 | ||
1354 | seg_i = CURSEG_I(sbi, i); | |
1355 | segno = le32_to_cpu(ckpt->cur_data_segno[i]); | |
1356 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]); | |
1357 | seg_i->next_segno = segno; | |
1358 | reset_curseg(sbi, i, 0); | |
1359 | seg_i->alloc_type = ckpt->alloc_type[i]; | |
1360 | seg_i->next_blkoff = blk_off; | |
1361 | ||
1362 | if (seg_i->alloc_type == SSR) | |
1363 | blk_off = sbi->blocks_per_seg; | |
1364 | ||
1365 | for (j = 0; j < blk_off; j++) { | |
1366 | struct f2fs_summary *s; | |
1367 | s = (struct f2fs_summary *)(kaddr + offset); | |
1368 | seg_i->sum_blk->entries[j] = *s; | |
1369 | offset += SUMMARY_SIZE; | |
1370 | if (offset + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1371 | SUM_FOOTER_SIZE) | |
1372 | continue; | |
1373 | ||
1374 | f2fs_put_page(page, 1); | |
1375 | page = NULL; | |
1376 | ||
1377 | page = get_meta_page(sbi, start++); | |
1378 | kaddr = (unsigned char *)page_address(page); | |
1379 | offset = 0; | |
1380 | } | |
1381 | } | |
1382 | f2fs_put_page(page, 1); | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) | |
1387 | { | |
1388 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1389 | struct f2fs_summary_block *sum; | |
1390 | struct curseg_info *curseg; | |
1391 | struct page *new; | |
1392 | unsigned short blk_off; | |
1393 | unsigned int segno = 0; | |
1394 | block_t blk_addr = 0; | |
1395 | ||
1396 | /* get segment number and block addr */ | |
1397 | if (IS_DATASEG(type)) { | |
1398 | segno = le32_to_cpu(ckpt->cur_data_segno[type]); | |
1399 | blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type - | |
1400 | CURSEG_HOT_DATA]); | |
25ca923b | 1401 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1402 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type); |
1403 | else | |
1404 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type); | |
1405 | } else { | |
1406 | segno = le32_to_cpu(ckpt->cur_node_segno[type - | |
1407 | CURSEG_HOT_NODE]); | |
1408 | blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type - | |
1409 | CURSEG_HOT_NODE]); | |
25ca923b | 1410 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) |
351df4b2 JK |
1411 | blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE, |
1412 | type - CURSEG_HOT_NODE); | |
1413 | else | |
1414 | blk_addr = GET_SUM_BLOCK(sbi, segno); | |
1415 | } | |
1416 | ||
1417 | new = get_meta_page(sbi, blk_addr); | |
1418 | sum = (struct f2fs_summary_block *)page_address(new); | |
1419 | ||
1420 | if (IS_NODESEG(type)) { | |
25ca923b | 1421 | if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) { |
351df4b2 JK |
1422 | struct f2fs_summary *ns = &sum->entries[0]; |
1423 | int i; | |
1424 | for (i = 0; i < sbi->blocks_per_seg; i++, ns++) { | |
1425 | ns->version = 0; | |
1426 | ns->ofs_in_node = 0; | |
1427 | } | |
1428 | } else { | |
d653788a GZ |
1429 | int err; |
1430 | ||
1431 | err = restore_node_summary(sbi, segno, sum); | |
1432 | if (err) { | |
351df4b2 | 1433 | f2fs_put_page(new, 1); |
d653788a | 1434 | return err; |
351df4b2 JK |
1435 | } |
1436 | } | |
1437 | } | |
1438 | ||
1439 | /* set uncompleted segment to curseg */ | |
1440 | curseg = CURSEG_I(sbi, type); | |
1441 | mutex_lock(&curseg->curseg_mutex); | |
1442 | memcpy(curseg->sum_blk, sum, PAGE_CACHE_SIZE); | |
1443 | curseg->next_segno = segno; | |
1444 | reset_curseg(sbi, type, 0); | |
1445 | curseg->alloc_type = ckpt->alloc_type[type]; | |
1446 | curseg->next_blkoff = blk_off; | |
1447 | mutex_unlock(&curseg->curseg_mutex); | |
1448 | f2fs_put_page(new, 1); | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static int restore_curseg_summaries(struct f2fs_sb_info *sbi) | |
1453 | { | |
1454 | int type = CURSEG_HOT_DATA; | |
e4fc5fbf | 1455 | int err; |
351df4b2 | 1456 | |
25ca923b | 1457 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) { |
351df4b2 JK |
1458 | /* restore for compacted data summary */ |
1459 | if (read_compacted_summaries(sbi)) | |
1460 | return -EINVAL; | |
1461 | type = CURSEG_HOT_NODE; | |
1462 | } | |
1463 | ||
e4fc5fbf CY |
1464 | for (; type <= CURSEG_COLD_NODE; type++) { |
1465 | err = read_normal_summaries(sbi, type); | |
1466 | if (err) | |
1467 | return err; | |
1468 | } | |
1469 | ||
351df4b2 JK |
1470 | return 0; |
1471 | } | |
1472 | ||
1473 | static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1474 | { | |
1475 | struct page *page; | |
1476 | unsigned char *kaddr; | |
1477 | struct f2fs_summary *summary; | |
1478 | struct curseg_info *seg_i; | |
1479 | int written_size = 0; | |
1480 | int i, j; | |
1481 | ||
1482 | page = grab_meta_page(sbi, blkaddr++); | |
1483 | kaddr = (unsigned char *)page_address(page); | |
1484 | ||
1485 | /* Step 1: write nat cache */ | |
1486 | seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA); | |
1487 | memcpy(kaddr, &seg_i->sum_blk->n_nats, SUM_JOURNAL_SIZE); | |
1488 | written_size += SUM_JOURNAL_SIZE; | |
1489 | ||
1490 | /* Step 2: write sit cache */ | |
1491 | seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1492 | memcpy(kaddr + written_size, &seg_i->sum_blk->n_sits, | |
1493 | SUM_JOURNAL_SIZE); | |
1494 | written_size += SUM_JOURNAL_SIZE; | |
1495 | ||
351df4b2 JK |
1496 | /* Step 3: write summary entries */ |
1497 | for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) { | |
1498 | unsigned short blkoff; | |
1499 | seg_i = CURSEG_I(sbi, i); | |
1500 | if (sbi->ckpt->alloc_type[i] == SSR) | |
1501 | blkoff = sbi->blocks_per_seg; | |
1502 | else | |
1503 | blkoff = curseg_blkoff(sbi, i); | |
1504 | ||
1505 | for (j = 0; j < blkoff; j++) { | |
1506 | if (!page) { | |
1507 | page = grab_meta_page(sbi, blkaddr++); | |
1508 | kaddr = (unsigned char *)page_address(page); | |
1509 | written_size = 0; | |
1510 | } | |
1511 | summary = (struct f2fs_summary *)(kaddr + written_size); | |
1512 | *summary = seg_i->sum_blk->entries[j]; | |
1513 | written_size += SUMMARY_SIZE; | |
351df4b2 JK |
1514 | |
1515 | if (written_size + SUMMARY_SIZE <= PAGE_CACHE_SIZE - | |
1516 | SUM_FOOTER_SIZE) | |
1517 | continue; | |
1518 | ||
e8d61a74 | 1519 | set_page_dirty(page); |
351df4b2 JK |
1520 | f2fs_put_page(page, 1); |
1521 | page = NULL; | |
1522 | } | |
1523 | } | |
e8d61a74 CY |
1524 | if (page) { |
1525 | set_page_dirty(page); | |
351df4b2 | 1526 | f2fs_put_page(page, 1); |
e8d61a74 | 1527 | } |
351df4b2 JK |
1528 | } |
1529 | ||
1530 | static void write_normal_summaries(struct f2fs_sb_info *sbi, | |
1531 | block_t blkaddr, int type) | |
1532 | { | |
1533 | int i, end; | |
1534 | if (IS_DATASEG(type)) | |
1535 | end = type + NR_CURSEG_DATA_TYPE; | |
1536 | else | |
1537 | end = type + NR_CURSEG_NODE_TYPE; | |
1538 | ||
1539 | for (i = type; i < end; i++) { | |
1540 | struct curseg_info *sum = CURSEG_I(sbi, i); | |
1541 | mutex_lock(&sum->curseg_mutex); | |
1542 | write_sum_page(sbi, sum->sum_blk, blkaddr + (i - type)); | |
1543 | mutex_unlock(&sum->curseg_mutex); | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1548 | { | |
25ca923b | 1549 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_COMPACT_SUM_FLAG)) |
351df4b2 JK |
1550 | write_compacted_summaries(sbi, start_blk); |
1551 | else | |
1552 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_DATA); | |
1553 | } | |
1554 | ||
1555 | void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk) | |
1556 | { | |
25ca923b | 1557 | if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) |
351df4b2 | 1558 | write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE); |
351df4b2 JK |
1559 | } |
1560 | ||
1561 | int lookup_journal_in_cursum(struct f2fs_summary_block *sum, int type, | |
1562 | unsigned int val, int alloc) | |
1563 | { | |
1564 | int i; | |
1565 | ||
1566 | if (type == NAT_JOURNAL) { | |
1567 | for (i = 0; i < nats_in_cursum(sum); i++) { | |
1568 | if (le32_to_cpu(nid_in_journal(sum, i)) == val) | |
1569 | return i; | |
1570 | } | |
1571 | if (alloc && nats_in_cursum(sum) < NAT_JOURNAL_ENTRIES) | |
1572 | return update_nats_in_cursum(sum, 1); | |
1573 | } else if (type == SIT_JOURNAL) { | |
1574 | for (i = 0; i < sits_in_cursum(sum); i++) | |
1575 | if (le32_to_cpu(segno_in_journal(sum, i)) == val) | |
1576 | return i; | |
1577 | if (alloc && sits_in_cursum(sum) < SIT_JOURNAL_ENTRIES) | |
1578 | return update_sits_in_cursum(sum, 1); | |
1579 | } | |
1580 | return -1; | |
1581 | } | |
1582 | ||
1583 | static struct page *get_current_sit_page(struct f2fs_sb_info *sbi, | |
1584 | unsigned int segno) | |
1585 | { | |
2cc22186 | 1586 | return get_meta_page(sbi, current_sit_addr(sbi, segno)); |
351df4b2 JK |
1587 | } |
1588 | ||
1589 | static struct page *get_next_sit_page(struct f2fs_sb_info *sbi, | |
1590 | unsigned int start) | |
1591 | { | |
1592 | struct sit_info *sit_i = SIT_I(sbi); | |
1593 | struct page *src_page, *dst_page; | |
1594 | pgoff_t src_off, dst_off; | |
1595 | void *src_addr, *dst_addr; | |
1596 | ||
1597 | src_off = current_sit_addr(sbi, start); | |
1598 | dst_off = next_sit_addr(sbi, src_off); | |
1599 | ||
1600 | /* get current sit block page without lock */ | |
1601 | src_page = get_meta_page(sbi, src_off); | |
1602 | dst_page = grab_meta_page(sbi, dst_off); | |
9850cf4a | 1603 | f2fs_bug_on(sbi, PageDirty(src_page)); |
351df4b2 JK |
1604 | |
1605 | src_addr = page_address(src_page); | |
1606 | dst_addr = page_address(dst_page); | |
1607 | memcpy(dst_addr, src_addr, PAGE_CACHE_SIZE); | |
1608 | ||
1609 | set_page_dirty(dst_page); | |
1610 | f2fs_put_page(src_page, 1); | |
1611 | ||
1612 | set_to_next_sit(sit_i, start); | |
1613 | ||
1614 | return dst_page; | |
1615 | } | |
1616 | ||
184a5cd2 CY |
1617 | static struct sit_entry_set *grab_sit_entry_set(void) |
1618 | { | |
1619 | struct sit_entry_set *ses = | |
1620 | f2fs_kmem_cache_alloc(sit_entry_set_slab, GFP_ATOMIC); | |
1621 | ||
1622 | ses->entry_cnt = 0; | |
1623 | INIT_LIST_HEAD(&ses->set_list); | |
1624 | return ses; | |
1625 | } | |
1626 | ||
1627 | static void release_sit_entry_set(struct sit_entry_set *ses) | |
1628 | { | |
1629 | list_del(&ses->set_list); | |
1630 | kmem_cache_free(sit_entry_set_slab, ses); | |
1631 | } | |
1632 | ||
1633 | static void adjust_sit_entry_set(struct sit_entry_set *ses, | |
1634 | struct list_head *head) | |
1635 | { | |
1636 | struct sit_entry_set *next = ses; | |
1637 | ||
1638 | if (list_is_last(&ses->set_list, head)) | |
1639 | return; | |
1640 | ||
1641 | list_for_each_entry_continue(next, head, set_list) | |
1642 | if (ses->entry_cnt <= next->entry_cnt) | |
1643 | break; | |
1644 | ||
1645 | list_move_tail(&ses->set_list, &next->set_list); | |
1646 | } | |
1647 | ||
1648 | static void add_sit_entry(unsigned int segno, struct list_head *head) | |
1649 | { | |
1650 | struct sit_entry_set *ses; | |
1651 | unsigned int start_segno = START_SEGNO(segno); | |
1652 | ||
1653 | list_for_each_entry(ses, head, set_list) { | |
1654 | if (ses->start_segno == start_segno) { | |
1655 | ses->entry_cnt++; | |
1656 | adjust_sit_entry_set(ses, head); | |
1657 | return; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | ses = grab_sit_entry_set(); | |
1662 | ||
1663 | ses->start_segno = start_segno; | |
1664 | ses->entry_cnt++; | |
1665 | list_add(&ses->set_list, head); | |
1666 | } | |
1667 | ||
1668 | static void add_sits_in_set(struct f2fs_sb_info *sbi) | |
1669 | { | |
1670 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
1671 | struct list_head *set_list = &sm_info->sit_entry_set; | |
1672 | unsigned long *bitmap = SIT_I(sbi)->dirty_sentries_bitmap; | |
184a5cd2 CY |
1673 | unsigned int segno; |
1674 | ||
7cd8558b | 1675 | for_each_set_bit(segno, bitmap, MAIN_SEGS(sbi)) |
184a5cd2 CY |
1676 | add_sit_entry(segno, set_list); |
1677 | } | |
1678 | ||
1679 | static void remove_sits_in_journal(struct f2fs_sb_info *sbi) | |
351df4b2 JK |
1680 | { |
1681 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1682 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
1683 | int i; | |
1684 | ||
184a5cd2 CY |
1685 | for (i = sits_in_cursum(sum) - 1; i >= 0; i--) { |
1686 | unsigned int segno; | |
1687 | bool dirtied; | |
1688 | ||
1689 | segno = le32_to_cpu(segno_in_journal(sum, i)); | |
1690 | dirtied = __mark_sit_entry_dirty(sbi, segno); | |
1691 | ||
1692 | if (!dirtied) | |
1693 | add_sit_entry(segno, &SM_I(sbi)->sit_entry_set); | |
351df4b2 | 1694 | } |
184a5cd2 | 1695 | update_sits_in_cursum(sum, -sits_in_cursum(sum)); |
351df4b2 JK |
1696 | } |
1697 | ||
0a8165d7 | 1698 | /* |
351df4b2 JK |
1699 | * CP calls this function, which flushes SIT entries including sit_journal, |
1700 | * and moves prefree segs to free segs. | |
1701 | */ | |
4b2fecc8 | 1702 | void flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc) |
351df4b2 JK |
1703 | { |
1704 | struct sit_info *sit_i = SIT_I(sbi); | |
1705 | unsigned long *bitmap = sit_i->dirty_sentries_bitmap; | |
1706 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1707 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
184a5cd2 CY |
1708 | struct sit_entry_set *ses, *tmp; |
1709 | struct list_head *head = &SM_I(sbi)->sit_entry_set; | |
184a5cd2 | 1710 | bool to_journal = true; |
4b2fecc8 | 1711 | struct seg_entry *se; |
351df4b2 JK |
1712 | |
1713 | mutex_lock(&curseg->curseg_mutex); | |
1714 | mutex_lock(&sit_i->sentry_lock); | |
1715 | ||
1716 | /* | |
184a5cd2 CY |
1717 | * add and account sit entries of dirty bitmap in sit entry |
1718 | * set temporarily | |
351df4b2 | 1719 | */ |
184a5cd2 | 1720 | add_sits_in_set(sbi); |
351df4b2 | 1721 | |
184a5cd2 CY |
1722 | /* |
1723 | * if there are no enough space in journal to store dirty sit | |
1724 | * entries, remove all entries from journal and add and account | |
1725 | * them in sit entry set. | |
1726 | */ | |
1727 | if (!__has_cursum_space(sum, sit_i->dirty_sentries, SIT_JOURNAL)) | |
1728 | remove_sits_in_journal(sbi); | |
b2955550 | 1729 | |
184a5cd2 CY |
1730 | if (!sit_i->dirty_sentries) |
1731 | goto out; | |
351df4b2 | 1732 | |
184a5cd2 CY |
1733 | /* |
1734 | * there are two steps to flush sit entries: | |
1735 | * #1, flush sit entries to journal in current cold data summary block. | |
1736 | * #2, flush sit entries to sit page. | |
1737 | */ | |
1738 | list_for_each_entry_safe(ses, tmp, head, set_list) { | |
4a257ed6 | 1739 | struct page *page = NULL; |
184a5cd2 CY |
1740 | struct f2fs_sit_block *raw_sit = NULL; |
1741 | unsigned int start_segno = ses->start_segno; | |
1742 | unsigned int end = min(start_segno + SIT_ENTRY_PER_BLOCK, | |
7cd8558b | 1743 | (unsigned long)MAIN_SEGS(sbi)); |
184a5cd2 CY |
1744 | unsigned int segno = start_segno; |
1745 | ||
1746 | if (to_journal && | |
1747 | !__has_cursum_space(sum, ses->entry_cnt, SIT_JOURNAL)) | |
1748 | to_journal = false; | |
1749 | ||
1750 | if (!to_journal) { | |
1751 | page = get_next_sit_page(sbi, start_segno); | |
1752 | raw_sit = page_address(page); | |
351df4b2 | 1753 | } |
351df4b2 | 1754 | |
184a5cd2 CY |
1755 | /* flush dirty sit entries in region of current sit set */ |
1756 | for_each_set_bit_from(segno, bitmap, end) { | |
1757 | int offset, sit_offset; | |
4b2fecc8 JK |
1758 | |
1759 | se = get_seg_entry(sbi, segno); | |
184a5cd2 CY |
1760 | |
1761 | /* add discard candidates */ | |
4b2fecc8 JK |
1762 | if (SM_I(sbi)->nr_discards < SM_I(sbi)->max_discards) { |
1763 | cpc->trim_start = segno; | |
1764 | add_discard_addrs(sbi, cpc); | |
1765 | } | |
184a5cd2 CY |
1766 | |
1767 | if (to_journal) { | |
1768 | offset = lookup_journal_in_cursum(sum, | |
1769 | SIT_JOURNAL, segno, 1); | |
1770 | f2fs_bug_on(sbi, offset < 0); | |
1771 | segno_in_journal(sum, offset) = | |
1772 | cpu_to_le32(segno); | |
1773 | seg_info_to_raw_sit(se, | |
1774 | &sit_in_journal(sum, offset)); | |
1775 | } else { | |
1776 | sit_offset = SIT_ENTRY_OFFSET(sit_i, segno); | |
1777 | seg_info_to_raw_sit(se, | |
1778 | &raw_sit->entries[sit_offset]); | |
1779 | } | |
351df4b2 | 1780 | |
184a5cd2 CY |
1781 | __clear_bit(segno, bitmap); |
1782 | sit_i->dirty_sentries--; | |
1783 | ses->entry_cnt--; | |
351df4b2 JK |
1784 | } |
1785 | ||
184a5cd2 CY |
1786 | if (!to_journal) |
1787 | f2fs_put_page(page, 1); | |
1788 | ||
1789 | f2fs_bug_on(sbi, ses->entry_cnt); | |
1790 | release_sit_entry_set(ses); | |
351df4b2 | 1791 | } |
184a5cd2 CY |
1792 | |
1793 | f2fs_bug_on(sbi, !list_empty(head)); | |
1794 | f2fs_bug_on(sbi, sit_i->dirty_sentries); | |
184a5cd2 | 1795 | out: |
4b2fecc8 JK |
1796 | if (cpc->reason == CP_DISCARD) { |
1797 | for (; cpc->trim_start <= cpc->trim_end; cpc->trim_start++) | |
1798 | add_discard_addrs(sbi, cpc); | |
1799 | } | |
351df4b2 JK |
1800 | mutex_unlock(&sit_i->sentry_lock); |
1801 | mutex_unlock(&curseg->curseg_mutex); | |
1802 | ||
351df4b2 JK |
1803 | set_prefree_as_free_segments(sbi); |
1804 | } | |
1805 | ||
1806 | static int build_sit_info(struct f2fs_sb_info *sbi) | |
1807 | { | |
1808 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
1809 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1810 | struct sit_info *sit_i; | |
1811 | unsigned int sit_segs, start; | |
1812 | char *src_bitmap, *dst_bitmap; | |
1813 | unsigned int bitmap_size; | |
1814 | ||
1815 | /* allocate memory for SIT information */ | |
1816 | sit_i = kzalloc(sizeof(struct sit_info), GFP_KERNEL); | |
1817 | if (!sit_i) | |
1818 | return -ENOMEM; | |
1819 | ||
1820 | SM_I(sbi)->sit_info = sit_i; | |
1821 | ||
7cd8558b | 1822 | sit_i->sentries = vzalloc(MAIN_SEGS(sbi) * sizeof(struct seg_entry)); |
351df4b2 JK |
1823 | if (!sit_i->sentries) |
1824 | return -ENOMEM; | |
1825 | ||
7cd8558b | 1826 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); |
351df4b2 JK |
1827 | sit_i->dirty_sentries_bitmap = kzalloc(bitmap_size, GFP_KERNEL); |
1828 | if (!sit_i->dirty_sentries_bitmap) | |
1829 | return -ENOMEM; | |
1830 | ||
7cd8558b | 1831 | for (start = 0; start < MAIN_SEGS(sbi); start++) { |
351df4b2 JK |
1832 | sit_i->sentries[start].cur_valid_map |
1833 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1834 | sit_i->sentries[start].ckpt_valid_map | |
1835 | = kzalloc(SIT_VBLOCK_MAP_SIZE, GFP_KERNEL); | |
1836 | if (!sit_i->sentries[start].cur_valid_map | |
1837 | || !sit_i->sentries[start].ckpt_valid_map) | |
1838 | return -ENOMEM; | |
1839 | } | |
1840 | ||
1841 | if (sbi->segs_per_sec > 1) { | |
7cd8558b | 1842 | sit_i->sec_entries = vzalloc(MAIN_SECS(sbi) * |
351df4b2 JK |
1843 | sizeof(struct sec_entry)); |
1844 | if (!sit_i->sec_entries) | |
1845 | return -ENOMEM; | |
1846 | } | |
1847 | ||
1848 | /* get information related with SIT */ | |
1849 | sit_segs = le32_to_cpu(raw_super->segment_count_sit) >> 1; | |
1850 | ||
1851 | /* setup SIT bitmap from ckeckpoint pack */ | |
1852 | bitmap_size = __bitmap_size(sbi, SIT_BITMAP); | |
1853 | src_bitmap = __bitmap_ptr(sbi, SIT_BITMAP); | |
1854 | ||
79b5793b | 1855 | dst_bitmap = kmemdup(src_bitmap, bitmap_size, GFP_KERNEL); |
351df4b2 JK |
1856 | if (!dst_bitmap) |
1857 | return -ENOMEM; | |
351df4b2 JK |
1858 | |
1859 | /* init SIT information */ | |
1860 | sit_i->s_ops = &default_salloc_ops; | |
1861 | ||
1862 | sit_i->sit_base_addr = le32_to_cpu(raw_super->sit_blkaddr); | |
1863 | sit_i->sit_blocks = sit_segs << sbi->log_blocks_per_seg; | |
1864 | sit_i->written_valid_blocks = le64_to_cpu(ckpt->valid_block_count); | |
1865 | sit_i->sit_bitmap = dst_bitmap; | |
1866 | sit_i->bitmap_size = bitmap_size; | |
1867 | sit_i->dirty_sentries = 0; | |
1868 | sit_i->sents_per_block = SIT_ENTRY_PER_BLOCK; | |
1869 | sit_i->elapsed_time = le64_to_cpu(sbi->ckpt->elapsed_time); | |
1870 | sit_i->mounted_time = CURRENT_TIME_SEC.tv_sec; | |
1871 | mutex_init(&sit_i->sentry_lock); | |
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | static int build_free_segmap(struct f2fs_sb_info *sbi) | |
1876 | { | |
351df4b2 JK |
1877 | struct free_segmap_info *free_i; |
1878 | unsigned int bitmap_size, sec_bitmap_size; | |
1879 | ||
1880 | /* allocate memory for free segmap information */ | |
1881 | free_i = kzalloc(sizeof(struct free_segmap_info), GFP_KERNEL); | |
1882 | if (!free_i) | |
1883 | return -ENOMEM; | |
1884 | ||
1885 | SM_I(sbi)->free_info = free_i; | |
1886 | ||
7cd8558b | 1887 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); |
351df4b2 JK |
1888 | free_i->free_segmap = kmalloc(bitmap_size, GFP_KERNEL); |
1889 | if (!free_i->free_segmap) | |
1890 | return -ENOMEM; | |
1891 | ||
7cd8558b | 1892 | sec_bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); |
351df4b2 JK |
1893 | free_i->free_secmap = kmalloc(sec_bitmap_size, GFP_KERNEL); |
1894 | if (!free_i->free_secmap) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | /* set all segments as dirty temporarily */ | |
1898 | memset(free_i->free_segmap, 0xff, bitmap_size); | |
1899 | memset(free_i->free_secmap, 0xff, sec_bitmap_size); | |
1900 | ||
1901 | /* init free segmap information */ | |
7cd8558b | 1902 | free_i->start_segno = GET_SEGNO_FROM_SEG0(sbi, MAIN_BLKADDR(sbi)); |
351df4b2 JK |
1903 | free_i->free_segments = 0; |
1904 | free_i->free_sections = 0; | |
1905 | rwlock_init(&free_i->segmap_lock); | |
1906 | return 0; | |
1907 | } | |
1908 | ||
1909 | static int build_curseg(struct f2fs_sb_info *sbi) | |
1910 | { | |
1042d60f | 1911 | struct curseg_info *array; |
351df4b2 JK |
1912 | int i; |
1913 | ||
b434babf | 1914 | array = kcalloc(NR_CURSEG_TYPE, sizeof(*array), GFP_KERNEL); |
351df4b2 JK |
1915 | if (!array) |
1916 | return -ENOMEM; | |
1917 | ||
1918 | SM_I(sbi)->curseg_array = array; | |
1919 | ||
1920 | for (i = 0; i < NR_CURSEG_TYPE; i++) { | |
1921 | mutex_init(&array[i].curseg_mutex); | |
1922 | array[i].sum_blk = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL); | |
1923 | if (!array[i].sum_blk) | |
1924 | return -ENOMEM; | |
1925 | array[i].segno = NULL_SEGNO; | |
1926 | array[i].next_blkoff = 0; | |
1927 | } | |
1928 | return restore_curseg_summaries(sbi); | |
1929 | } | |
1930 | ||
1931 | static void build_sit_entries(struct f2fs_sb_info *sbi) | |
1932 | { | |
1933 | struct sit_info *sit_i = SIT_I(sbi); | |
1934 | struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_COLD_DATA); | |
1935 | struct f2fs_summary_block *sum = curseg->sum_blk; | |
74de593a CY |
1936 | int sit_blk_cnt = SIT_BLK_CNT(sbi); |
1937 | unsigned int i, start, end; | |
1938 | unsigned int readed, start_blk = 0; | |
90a893c7 | 1939 | int nrpages = MAX_BIO_BLOCKS(sbi); |
351df4b2 | 1940 | |
74de593a | 1941 | do { |
662befda | 1942 | readed = ra_meta_pages(sbi, start_blk, nrpages, META_SIT); |
74de593a CY |
1943 | |
1944 | start = start_blk * sit_i->sents_per_block; | |
1945 | end = (start_blk + readed) * sit_i->sents_per_block; | |
1946 | ||
7cd8558b | 1947 | for (; start < end && start < MAIN_SEGS(sbi); start++) { |
74de593a CY |
1948 | struct seg_entry *se = &sit_i->sentries[start]; |
1949 | struct f2fs_sit_block *sit_blk; | |
1950 | struct f2fs_sit_entry sit; | |
1951 | struct page *page; | |
1952 | ||
1953 | mutex_lock(&curseg->curseg_mutex); | |
1954 | for (i = 0; i < sits_in_cursum(sum); i++) { | |
6c311ec6 CF |
1955 | if (le32_to_cpu(segno_in_journal(sum, i)) |
1956 | == start) { | |
74de593a CY |
1957 | sit = sit_in_journal(sum, i); |
1958 | mutex_unlock(&curseg->curseg_mutex); | |
1959 | goto got_it; | |
1960 | } | |
351df4b2 | 1961 | } |
74de593a CY |
1962 | mutex_unlock(&curseg->curseg_mutex); |
1963 | ||
1964 | page = get_current_sit_page(sbi, start); | |
1965 | sit_blk = (struct f2fs_sit_block *)page_address(page); | |
1966 | sit = sit_blk->entries[SIT_ENTRY_OFFSET(sit_i, start)]; | |
1967 | f2fs_put_page(page, 1); | |
351df4b2 | 1968 | got_it: |
74de593a CY |
1969 | check_block_count(sbi, start, &sit); |
1970 | seg_info_from_raw_sit(se, &sit); | |
1971 | if (sbi->segs_per_sec > 1) { | |
1972 | struct sec_entry *e = get_sec_entry(sbi, start); | |
1973 | e->valid_blocks += se->valid_blocks; | |
1974 | } | |
351df4b2 | 1975 | } |
74de593a CY |
1976 | start_blk += readed; |
1977 | } while (start_blk < sit_blk_cnt); | |
351df4b2 JK |
1978 | } |
1979 | ||
1980 | static void init_free_segmap(struct f2fs_sb_info *sbi) | |
1981 | { | |
1982 | unsigned int start; | |
1983 | int type; | |
1984 | ||
7cd8558b | 1985 | for (start = 0; start < MAIN_SEGS(sbi); start++) { |
351df4b2 JK |
1986 | struct seg_entry *sentry = get_seg_entry(sbi, start); |
1987 | if (!sentry->valid_blocks) | |
1988 | __set_free(sbi, start); | |
1989 | } | |
1990 | ||
1991 | /* set use the current segments */ | |
1992 | for (type = CURSEG_HOT_DATA; type <= CURSEG_COLD_NODE; type++) { | |
1993 | struct curseg_info *curseg_t = CURSEG_I(sbi, type); | |
1994 | __set_test_and_inuse(sbi, curseg_t->segno); | |
1995 | } | |
1996 | } | |
1997 | ||
1998 | static void init_dirty_segmap(struct f2fs_sb_info *sbi) | |
1999 | { | |
2000 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
2001 | struct free_segmap_info *free_i = FREE_I(sbi); | |
7cd8558b | 2002 | unsigned int segno = 0, offset = 0; |
351df4b2 JK |
2003 | unsigned short valid_blocks; |
2004 | ||
8736fbf0 | 2005 | while (1) { |
351df4b2 | 2006 | /* find dirty segment based on free segmap */ |
7cd8558b JK |
2007 | segno = find_next_inuse(free_i, MAIN_SEGS(sbi), offset); |
2008 | if (segno >= MAIN_SEGS(sbi)) | |
351df4b2 JK |
2009 | break; |
2010 | offset = segno + 1; | |
2011 | valid_blocks = get_valid_blocks(sbi, segno, 0); | |
ec325b52 | 2012 | if (valid_blocks == sbi->blocks_per_seg || !valid_blocks) |
351df4b2 | 2013 | continue; |
ec325b52 JK |
2014 | if (valid_blocks > sbi->blocks_per_seg) { |
2015 | f2fs_bug_on(sbi, 1); | |
2016 | continue; | |
2017 | } | |
351df4b2 JK |
2018 | mutex_lock(&dirty_i->seglist_lock); |
2019 | __locate_dirty_segment(sbi, segno, DIRTY); | |
2020 | mutex_unlock(&dirty_i->seglist_lock); | |
2021 | } | |
2022 | } | |
2023 | ||
5ec4e49f | 2024 | static int init_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
2025 | { |
2026 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
7cd8558b | 2027 | unsigned int bitmap_size = f2fs_bitmap_size(MAIN_SECS(sbi)); |
351df4b2 | 2028 | |
5ec4e49f JK |
2029 | dirty_i->victim_secmap = kzalloc(bitmap_size, GFP_KERNEL); |
2030 | if (!dirty_i->victim_secmap) | |
351df4b2 JK |
2031 | return -ENOMEM; |
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | static int build_dirty_segmap(struct f2fs_sb_info *sbi) | |
2036 | { | |
2037 | struct dirty_seglist_info *dirty_i; | |
2038 | unsigned int bitmap_size, i; | |
2039 | ||
2040 | /* allocate memory for dirty segments list information */ | |
2041 | dirty_i = kzalloc(sizeof(struct dirty_seglist_info), GFP_KERNEL); | |
2042 | if (!dirty_i) | |
2043 | return -ENOMEM; | |
2044 | ||
2045 | SM_I(sbi)->dirty_info = dirty_i; | |
2046 | mutex_init(&dirty_i->seglist_lock); | |
2047 | ||
7cd8558b | 2048 | bitmap_size = f2fs_bitmap_size(MAIN_SEGS(sbi)); |
351df4b2 JK |
2049 | |
2050 | for (i = 0; i < NR_DIRTY_TYPE; i++) { | |
2051 | dirty_i->dirty_segmap[i] = kzalloc(bitmap_size, GFP_KERNEL); | |
351df4b2 JK |
2052 | if (!dirty_i->dirty_segmap[i]) |
2053 | return -ENOMEM; | |
2054 | } | |
2055 | ||
2056 | init_dirty_segmap(sbi); | |
5ec4e49f | 2057 | return init_victim_secmap(sbi); |
351df4b2 JK |
2058 | } |
2059 | ||
0a8165d7 | 2060 | /* |
351df4b2 JK |
2061 | * Update min, max modified time for cost-benefit GC algorithm |
2062 | */ | |
2063 | static void init_min_max_mtime(struct f2fs_sb_info *sbi) | |
2064 | { | |
2065 | struct sit_info *sit_i = SIT_I(sbi); | |
2066 | unsigned int segno; | |
2067 | ||
2068 | mutex_lock(&sit_i->sentry_lock); | |
2069 | ||
2070 | sit_i->min_mtime = LLONG_MAX; | |
2071 | ||
7cd8558b | 2072 | for (segno = 0; segno < MAIN_SEGS(sbi); segno += sbi->segs_per_sec) { |
351df4b2 JK |
2073 | unsigned int i; |
2074 | unsigned long long mtime = 0; | |
2075 | ||
2076 | for (i = 0; i < sbi->segs_per_sec; i++) | |
2077 | mtime += get_seg_entry(sbi, segno + i)->mtime; | |
2078 | ||
2079 | mtime = div_u64(mtime, sbi->segs_per_sec); | |
2080 | ||
2081 | if (sit_i->min_mtime > mtime) | |
2082 | sit_i->min_mtime = mtime; | |
2083 | } | |
2084 | sit_i->max_mtime = get_mtime(sbi); | |
2085 | mutex_unlock(&sit_i->sentry_lock); | |
2086 | } | |
2087 | ||
2088 | int build_segment_manager(struct f2fs_sb_info *sbi) | |
2089 | { | |
2090 | struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi); | |
2091 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
1042d60f | 2092 | struct f2fs_sm_info *sm_info; |
351df4b2 JK |
2093 | int err; |
2094 | ||
2095 | sm_info = kzalloc(sizeof(struct f2fs_sm_info), GFP_KERNEL); | |
2096 | if (!sm_info) | |
2097 | return -ENOMEM; | |
2098 | ||
2099 | /* init sm info */ | |
2100 | sbi->sm_info = sm_info; | |
351df4b2 JK |
2101 | sm_info->seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr); |
2102 | sm_info->main_blkaddr = le32_to_cpu(raw_super->main_blkaddr); | |
2103 | sm_info->segment_count = le32_to_cpu(raw_super->segment_count); | |
2104 | sm_info->reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); | |
2105 | sm_info->ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); | |
2106 | sm_info->main_segments = le32_to_cpu(raw_super->segment_count_main); | |
2107 | sm_info->ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr); | |
58c41035 JK |
2108 | sm_info->rec_prefree_segments = sm_info->main_segments * |
2109 | DEF_RECLAIM_PREFREE_SEGMENTS / 100; | |
9b5f136f | 2110 | sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC; |
216fbd64 | 2111 | sm_info->min_ipu_util = DEF_MIN_IPU_UTIL; |
c1ce1b02 | 2112 | sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS; |
351df4b2 | 2113 | |
7fd9e544 JK |
2114 | INIT_LIST_HEAD(&sm_info->discard_list); |
2115 | sm_info->nr_discards = 0; | |
2116 | sm_info->max_discards = 0; | |
2117 | ||
184a5cd2 CY |
2118 | INIT_LIST_HEAD(&sm_info->sit_entry_set); |
2119 | ||
b270ad6f | 2120 | if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) { |
2163d198 GZ |
2121 | err = create_flush_cmd_control(sbi); |
2122 | if (err) | |
a688b9d9 | 2123 | return err; |
6b4afdd7 JK |
2124 | } |
2125 | ||
351df4b2 JK |
2126 | err = build_sit_info(sbi); |
2127 | if (err) | |
2128 | return err; | |
2129 | err = build_free_segmap(sbi); | |
2130 | if (err) | |
2131 | return err; | |
2132 | err = build_curseg(sbi); | |
2133 | if (err) | |
2134 | return err; | |
2135 | ||
2136 | /* reinit free segmap based on SIT */ | |
2137 | build_sit_entries(sbi); | |
2138 | ||
2139 | init_free_segmap(sbi); | |
2140 | err = build_dirty_segmap(sbi); | |
2141 | if (err) | |
2142 | return err; | |
2143 | ||
2144 | init_min_max_mtime(sbi); | |
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | static void discard_dirty_segmap(struct f2fs_sb_info *sbi, | |
2149 | enum dirty_type dirty_type) | |
2150 | { | |
2151 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
2152 | ||
2153 | mutex_lock(&dirty_i->seglist_lock); | |
2154 | kfree(dirty_i->dirty_segmap[dirty_type]); | |
2155 | dirty_i->nr_dirty[dirty_type] = 0; | |
2156 | mutex_unlock(&dirty_i->seglist_lock); | |
2157 | } | |
2158 | ||
5ec4e49f | 2159 | static void destroy_victim_secmap(struct f2fs_sb_info *sbi) |
351df4b2 JK |
2160 | { |
2161 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
5ec4e49f | 2162 | kfree(dirty_i->victim_secmap); |
351df4b2 JK |
2163 | } |
2164 | ||
2165 | static void destroy_dirty_segmap(struct f2fs_sb_info *sbi) | |
2166 | { | |
2167 | struct dirty_seglist_info *dirty_i = DIRTY_I(sbi); | |
2168 | int i; | |
2169 | ||
2170 | if (!dirty_i) | |
2171 | return; | |
2172 | ||
2173 | /* discard pre-free/dirty segments list */ | |
2174 | for (i = 0; i < NR_DIRTY_TYPE; i++) | |
2175 | discard_dirty_segmap(sbi, i); | |
2176 | ||
5ec4e49f | 2177 | destroy_victim_secmap(sbi); |
351df4b2 JK |
2178 | SM_I(sbi)->dirty_info = NULL; |
2179 | kfree(dirty_i); | |
2180 | } | |
2181 | ||
2182 | static void destroy_curseg(struct f2fs_sb_info *sbi) | |
2183 | { | |
2184 | struct curseg_info *array = SM_I(sbi)->curseg_array; | |
2185 | int i; | |
2186 | ||
2187 | if (!array) | |
2188 | return; | |
2189 | SM_I(sbi)->curseg_array = NULL; | |
2190 | for (i = 0; i < NR_CURSEG_TYPE; i++) | |
2191 | kfree(array[i].sum_blk); | |
2192 | kfree(array); | |
2193 | } | |
2194 | ||
2195 | static void destroy_free_segmap(struct f2fs_sb_info *sbi) | |
2196 | { | |
2197 | struct free_segmap_info *free_i = SM_I(sbi)->free_info; | |
2198 | if (!free_i) | |
2199 | return; | |
2200 | SM_I(sbi)->free_info = NULL; | |
2201 | kfree(free_i->free_segmap); | |
2202 | kfree(free_i->free_secmap); | |
2203 | kfree(free_i); | |
2204 | } | |
2205 | ||
2206 | static void destroy_sit_info(struct f2fs_sb_info *sbi) | |
2207 | { | |
2208 | struct sit_info *sit_i = SIT_I(sbi); | |
2209 | unsigned int start; | |
2210 | ||
2211 | if (!sit_i) | |
2212 | return; | |
2213 | ||
2214 | if (sit_i->sentries) { | |
7cd8558b | 2215 | for (start = 0; start < MAIN_SEGS(sbi); start++) { |
351df4b2 JK |
2216 | kfree(sit_i->sentries[start].cur_valid_map); |
2217 | kfree(sit_i->sentries[start].ckpt_valid_map); | |
2218 | } | |
2219 | } | |
2220 | vfree(sit_i->sentries); | |
2221 | vfree(sit_i->sec_entries); | |
2222 | kfree(sit_i->dirty_sentries_bitmap); | |
2223 | ||
2224 | SM_I(sbi)->sit_info = NULL; | |
2225 | kfree(sit_i->sit_bitmap); | |
2226 | kfree(sit_i); | |
2227 | } | |
2228 | ||
2229 | void destroy_segment_manager(struct f2fs_sb_info *sbi) | |
2230 | { | |
2231 | struct f2fs_sm_info *sm_info = SM_I(sbi); | |
a688b9d9 | 2232 | |
3b03f724 CY |
2233 | if (!sm_info) |
2234 | return; | |
2163d198 | 2235 | destroy_flush_cmd_control(sbi); |
351df4b2 JK |
2236 | destroy_dirty_segmap(sbi); |
2237 | destroy_curseg(sbi); | |
2238 | destroy_free_segmap(sbi); | |
2239 | destroy_sit_info(sbi); | |
2240 | sbi->sm_info = NULL; | |
2241 | kfree(sm_info); | |
2242 | } | |
7fd9e544 JK |
2243 | |
2244 | int __init create_segment_manager_caches(void) | |
2245 | { | |
2246 | discard_entry_slab = f2fs_kmem_cache_create("discard_entry", | |
e8512d2e | 2247 | sizeof(struct discard_entry)); |
7fd9e544 | 2248 | if (!discard_entry_slab) |
184a5cd2 CY |
2249 | goto fail; |
2250 | ||
2251 | sit_entry_set_slab = f2fs_kmem_cache_create("sit_entry_set", | |
c9ee0085 | 2252 | sizeof(struct sit_entry_set)); |
184a5cd2 CY |
2253 | if (!sit_entry_set_slab) |
2254 | goto destory_discard_entry; | |
88b88a66 JK |
2255 | |
2256 | inmem_entry_slab = f2fs_kmem_cache_create("inmem_page_entry", | |
2257 | sizeof(struct inmem_pages)); | |
2258 | if (!inmem_entry_slab) | |
2259 | goto destroy_sit_entry_set; | |
7fd9e544 | 2260 | return 0; |
184a5cd2 | 2261 | |
88b88a66 JK |
2262 | destroy_sit_entry_set: |
2263 | kmem_cache_destroy(sit_entry_set_slab); | |
184a5cd2 CY |
2264 | destory_discard_entry: |
2265 | kmem_cache_destroy(discard_entry_slab); | |
2266 | fail: | |
2267 | return -ENOMEM; | |
7fd9e544 JK |
2268 | } |
2269 | ||
2270 | void destroy_segment_manager_caches(void) | |
2271 | { | |
184a5cd2 | 2272 | kmem_cache_destroy(sit_entry_set_slab); |
7fd9e544 | 2273 | kmem_cache_destroy(discard_entry_slab); |
88b88a66 | 2274 | kmem_cache_destroy(inmem_entry_slab); |
7fd9e544 | 2275 | } |