Merge remote-tracking branch 'iommu/next'
[deliverable/linux.git] / fs / f2fs / segment.h
CommitLineData
0a8165d7 1/*
39a53e0c
JK
2 * fs/f2fs/segment.h
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 */
ac5d156c 11#include <linux/blkdev.h>
66114cad 12#include <linux/backing-dev.h>
ac5d156c 13
39a53e0c
JK
14/* constant macro */
15#define NULL_SEGNO ((unsigned int)(~0))
5ec4e49f 16#define NULL_SECNO ((unsigned int)(~0))
39a53e0c 17
58c41035 18#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */
44a83499 19#define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */
81eb8d6e 20
6224da87 21/* L: Logical segment # in volume, R: Relative segment # in main area */
39a53e0c
JK
22#define GET_L2R_SEGNO(free_i, segno) (segno - free_i->start_segno)
23#define GET_R2L_SEGNO(free_i, segno) (segno + free_i->start_segno)
24
61ae45c8
CL
25#define IS_DATASEG(t) (t <= CURSEG_COLD_DATA)
26#define IS_NODESEG(t) (t >= CURSEG_HOT_NODE)
39a53e0c 27
5c773ba3
JK
28#define IS_CURSEG(sbi, seg) \
29 ((seg == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \
30 (seg == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \
31 (seg == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \
32 (seg == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \
33 (seg == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \
34 (seg == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
39a53e0c
JK
35
36#define IS_CURSEC(sbi, secno) \
37 ((secno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \
38 sbi->segs_per_sec) || \
39 (secno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \
40 sbi->segs_per_sec) || \
41 (secno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \
42 sbi->segs_per_sec) || \
43 (secno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \
44 sbi->segs_per_sec) || \
45 (secno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \
46 sbi->segs_per_sec) || \
47 (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \
48 sbi->segs_per_sec)) \
49
7cd8558b
JK
50#define MAIN_BLKADDR(sbi) (SM_I(sbi)->main_blkaddr)
51#define SEG0_BLKADDR(sbi) (SM_I(sbi)->seg0_blkaddr)
52
53#define MAIN_SEGS(sbi) (SM_I(sbi)->main_segments)
54#define MAIN_SECS(sbi) (sbi->total_sections)
55
56#define TOTAL_SEGS(sbi) (SM_I(sbi)->segment_count)
57#define TOTAL_BLKS(sbi) (TOTAL_SEGS(sbi) << sbi->log_blocks_per_seg)
58
59#define MAX_BLKADDR(sbi) (SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi))
8a21984d 60#define SEGMENT_SIZE(sbi) (1ULL << (sbi->log_blocksize + \
7cd8558b
JK
61 sbi->log_blocks_per_seg))
62
63#define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \
39a53e0c 64 (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg))
7cd8558b 65
39a53e0c
JK
66#define NEXT_FREE_BLKADDR(sbi, curseg) \
67 (START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff)
68
7cd8558b 69#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) ((blk_addr) - SEG0_BLKADDR(sbi))
39a53e0c
JK
70#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \
71 (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
491c0854
JK
72#define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \
73 (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1))
74
39a53e0c
JK
75#define GET_SEGNO(sbi, blk_addr) \
76 (((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ? \
77 NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \
78 GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
79#define GET_SECNO(sbi, segno) \
80 ((segno) / sbi->segs_per_sec)
81#define GET_ZONENO_FROM_SEGNO(sbi, segno) \
82 ((segno / sbi->segs_per_sec) / sbi->secs_per_zone)
83
84#define GET_SUM_BLOCK(sbi, segno) \
85 ((sbi->sm_info->ssa_blkaddr) + segno)
86
87#define GET_SUM_TYPE(footer) ((footer)->entry_type)
88#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type)
89
90#define SIT_ENTRY_OFFSET(sit_i, segno) \
91 (segno % sit_i->sents_per_block)
d3a14afd 92#define SIT_BLOCK_OFFSET(segno) \
39a53e0c 93 (segno / SIT_ENTRY_PER_BLOCK)
d3a14afd
CY
94#define START_SEGNO(segno) \
95 (SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK)
74de593a 96#define SIT_BLK_CNT(sbi) \
7cd8558b 97 ((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK)
39a53e0c
JK
98#define f2fs_bitmap_size(nr) \
99 (BITS_TO_LONGS(nr) * sizeof(unsigned long))
39a53e0c 100
55cf9cb6
CY
101#define SECTOR_FROM_BLOCK(blk_addr) \
102 (((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK)
103#define SECTOR_TO_BLOCK(sectors) \
104 (sectors >> F2FS_LOG_SECTORS_PER_BLOCK)
90a893c7
JK
105#define MAX_BIO_BLOCKS(sbi) \
106 ((int)min((int)max_hw_blocks(sbi), BIO_MAX_PAGES))
3cd8a239 107
39a53e0c
JK
108/*
109 * indicate a block allocation direction: RIGHT and LEFT.
110 * RIGHT means allocating new sections towards the end of volume.
111 * LEFT means the opposite direction.
112 */
113enum {
114 ALLOC_RIGHT = 0,
115 ALLOC_LEFT
116};
117
118/*
119 * In the victim_sel_policy->alloc_mode, there are two block allocation modes.
120 * LFS writes data sequentially with cleaning operations.
121 * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations.
122 */
123enum {
124 LFS = 0,
125 SSR
126};
127
128/*
129 * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes.
130 * GC_CB is based on cost-benefit algorithm.
131 * GC_GREEDY is based on greedy algorithm.
132 */
133enum {
134 GC_CB = 0,
135 GC_GREEDY
136};
137
138/*
139 * BG_GC means the background cleaning job.
140 * FG_GC means the on-demand cleaning job.
6aefd93b 141 * FORCE_FG_GC means on-demand cleaning job in background.
39a53e0c
JK
142 */
143enum {
144 BG_GC = 0,
6aefd93b
JK
145 FG_GC,
146 FORCE_FG_GC,
39a53e0c
JK
147};
148
149/* for a function parameter to select a victim segment */
150struct victim_sel_policy {
151 int alloc_mode; /* LFS or SSR */
152 int gc_mode; /* GC_CB or GC_GREEDY */
153 unsigned long *dirty_segmap; /* dirty segment bitmap */
a26b7c8a 154 unsigned int max_search; /* maximum # of segments to search */
39a53e0c
JK
155 unsigned int offset; /* last scanned bitmap offset */
156 unsigned int ofs_unit; /* bitmap search unit */
157 unsigned int min_cost; /* minimum cost */
158 unsigned int min_segno; /* segment # having min. cost */
159};
160
161struct seg_entry {
f51b4ce6
CY
162 unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */
163 unsigned int valid_blocks:10; /* # of valid blocks */
164 unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */
165 unsigned int padding:6; /* padding */
39a53e0c
JK
166 unsigned char *cur_valid_map; /* validity bitmap of blocks */
167 /*
168 * # of valid blocks and the validity bitmap stored in the the last
169 * checkpoint pack. This information is used by the SSR mode.
170 */
f51b4ce6 171 unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */
a66cdd98 172 unsigned char *discard_map;
39a53e0c
JK
173 unsigned long long mtime; /* modification time of the segment */
174};
175
176struct sec_entry {
177 unsigned int valid_blocks; /* # of valid blocks in a section */
178};
179
180struct segment_allocation {
181 void (*allocate_segment)(struct f2fs_sb_info *, int, bool);
182};
183
decd36b6
CY
184/*
185 * this value is set in page as a private data which indicate that
186 * the page is atomically written, and it is in inmem_pages list.
187 */
d48dfc20 188#define ATOMIC_WRITTEN_PAGE ((unsigned long)-1)
decd36b6
CY
189
190#define IS_ATOMIC_WRITTEN_PAGE(page) \
191 (page_private(page) == (unsigned long)ATOMIC_WRITTEN_PAGE)
192
88b88a66
JK
193struct inmem_pages {
194 struct list_head list;
195 struct page *page;
28bc106b 196 block_t old_addr; /* for revoking when fail to commit */
88b88a66
JK
197};
198
39a53e0c
JK
199struct sit_info {
200 const struct segment_allocation *s_ops;
201
202 block_t sit_base_addr; /* start block address of SIT area */
203 block_t sit_blocks; /* # of blocks used by SIT area */
204 block_t written_valid_blocks; /* # of valid blocks in main area */
205 char *sit_bitmap; /* SIT bitmap pointer */
206 unsigned int bitmap_size; /* SIT bitmap size */
207
60a3b782 208 unsigned long *tmp_map; /* bitmap for temporal use */
39a53e0c
JK
209 unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */
210 unsigned int dirty_sentries; /* # of dirty sentries */
211 unsigned int sents_per_block; /* # of SIT entries per block */
212 struct mutex sentry_lock; /* to protect SIT cache */
213 struct seg_entry *sentries; /* SIT segment-level cache */
214 struct sec_entry *sec_entries; /* SIT section-level cache */
215
216 /* for cost-benefit algorithm in cleaning procedure */
217 unsigned long long elapsed_time; /* elapsed time after mount */
218 unsigned long long mounted_time; /* mount time */
219 unsigned long long min_mtime; /* min. modification time */
220 unsigned long long max_mtime; /* max. modification time */
221};
222
223struct free_segmap_info {
224 unsigned int start_segno; /* start segment number logically */
225 unsigned int free_segments; /* # of free segments */
226 unsigned int free_sections; /* # of free sections */
1a118ccf 227 spinlock_t segmap_lock; /* free segmap lock */
39a53e0c
JK
228 unsigned long *free_segmap; /* free segment bitmap */
229 unsigned long *free_secmap; /* free section bitmap */
230};
231
232/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */
233enum dirty_type {
234 DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */
235 DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */
236 DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */
237 DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */
238 DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */
239 DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */
240 DIRTY, /* to count # of dirty segments */
241 PRE, /* to count # of entirely obsolete segments */
242 NR_DIRTY_TYPE
243};
244
245struct dirty_seglist_info {
246 const struct victim_selection *v_ops; /* victim selction operation */
247 unsigned long *dirty_segmap[NR_DIRTY_TYPE];
248 struct mutex seglist_lock; /* lock for segment bitmaps */
249 int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */
5ec4e49f 250 unsigned long *victim_secmap; /* background GC victims */
39a53e0c
JK
251};
252
253/* victim selection function for cleaning and SSR */
254struct victim_selection {
255 int (*get_victim)(struct f2fs_sb_info *, unsigned int *,
256 int, int, char);
257};
258
259/* for active log information */
260struct curseg_info {
261 struct mutex curseg_mutex; /* lock for consistency */
262 struct f2fs_summary_block *sum_blk; /* cached summary block */
b7ad7512
CY
263 struct rw_semaphore journal_rwsem; /* protect journal area */
264 struct f2fs_journal *journal; /* cached journal info */
39a53e0c
JK
265 unsigned char alloc_type; /* current allocation type */
266 unsigned int segno; /* current segment number */
267 unsigned short next_blkoff; /* next block offset to write */
268 unsigned int zone; /* current zone number */
269 unsigned int next_segno; /* preallocated segment */
270};
271
184a5cd2
CY
272struct sit_entry_set {
273 struct list_head set_list; /* link with all sit sets */
274 unsigned int start_segno; /* start segno of sits in set */
275 unsigned int entry_cnt; /* the # of sit entries in set */
276};
277
39a53e0c
JK
278/*
279 * inline functions
280 */
281static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type)
282{
283 return (struct curseg_info *)(SM_I(sbi)->curseg_array + type);
284}
285
286static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi,
287 unsigned int segno)
288{
289 struct sit_info *sit_i = SIT_I(sbi);
290 return &sit_i->sentries[segno];
291}
292
293static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi,
294 unsigned int segno)
295{
296 struct sit_info *sit_i = SIT_I(sbi);
297 return &sit_i->sec_entries[GET_SECNO(sbi, segno)];
298}
299
300static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi,
301 unsigned int segno, int section)
302{
303 /*
304 * In order to get # of valid blocks in a section instantly from many
305 * segments, f2fs manages two counting structures separately.
306 */
307 if (section > 1)
308 return get_sec_entry(sbi, segno)->valid_blocks;
309 else
310 return get_seg_entry(sbi, segno)->valid_blocks;
311}
312
313static inline void seg_info_from_raw_sit(struct seg_entry *se,
314 struct f2fs_sit_entry *rs)
315{
316 se->valid_blocks = GET_SIT_VBLOCKS(rs);
317 se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs);
318 memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
319 memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
320 se->type = GET_SIT_TYPE(rs);
321 se->mtime = le64_to_cpu(rs->mtime);
322}
323
324static inline void seg_info_to_raw_sit(struct seg_entry *se,
325 struct f2fs_sit_entry *rs)
326{
327 unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) |
328 se->valid_blocks;
329 rs->vblocks = cpu_to_le16(raw_vblocks);
330 memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE);
331 memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
332 se->ckpt_valid_blocks = se->valid_blocks;
333 rs->mtime = cpu_to_le64(se->mtime);
334}
335
336static inline unsigned int find_next_inuse(struct free_segmap_info *free_i,
337 unsigned int max, unsigned int segno)
338{
339 unsigned int ret;
1a118ccf 340 spin_lock(&free_i->segmap_lock);
39a53e0c 341 ret = find_next_bit(free_i->free_segmap, max, segno);
1a118ccf 342 spin_unlock(&free_i->segmap_lock);
39a53e0c
JK
343 return ret;
344}
345
346static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
347{
348 struct free_segmap_info *free_i = FREE_I(sbi);
349 unsigned int secno = segno / sbi->segs_per_sec;
350 unsigned int start_segno = secno * sbi->segs_per_sec;
351 unsigned int next;
352
1a118ccf 353 spin_lock(&free_i->segmap_lock);
39a53e0c
JK
354 clear_bit(segno, free_i->free_segmap);
355 free_i->free_segments++;
356
7fd97019
WL
357 next = find_next_bit(free_i->free_segmap,
358 start_segno + sbi->segs_per_sec, start_segno);
39a53e0c
JK
359 if (next >= start_segno + sbi->segs_per_sec) {
360 clear_bit(secno, free_i->free_secmap);
361 free_i->free_sections++;
362 }
1a118ccf 363 spin_unlock(&free_i->segmap_lock);
39a53e0c
JK
364}
365
366static inline void __set_inuse(struct f2fs_sb_info *sbi,
367 unsigned int segno)
368{
369 struct free_segmap_info *free_i = FREE_I(sbi);
370 unsigned int secno = segno / sbi->segs_per_sec;
371 set_bit(segno, free_i->free_segmap);
372 free_i->free_segments--;
373 if (!test_and_set_bit(secno, free_i->free_secmap))
374 free_i->free_sections--;
375}
376
377static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
378 unsigned int segno)
379{
380 struct free_segmap_info *free_i = FREE_I(sbi);
381 unsigned int secno = segno / sbi->segs_per_sec;
382 unsigned int start_segno = secno * sbi->segs_per_sec;
383 unsigned int next;
384
1a118ccf 385 spin_lock(&free_i->segmap_lock);
39a53e0c
JK
386 if (test_and_clear_bit(segno, free_i->free_segmap)) {
387 free_i->free_segments++;
388
f1121ab0
CY
389 next = find_next_bit(free_i->free_segmap,
390 start_segno + sbi->segs_per_sec, start_segno);
39a53e0c
JK
391 if (next >= start_segno + sbi->segs_per_sec) {
392 if (test_and_clear_bit(secno, free_i->free_secmap))
393 free_i->free_sections++;
394 }
395 }
1a118ccf 396 spin_unlock(&free_i->segmap_lock);
39a53e0c
JK
397}
398
399static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi,
400 unsigned int segno)
401{
402 struct free_segmap_info *free_i = FREE_I(sbi);
403 unsigned int secno = segno / sbi->segs_per_sec;
1a118ccf 404 spin_lock(&free_i->segmap_lock);
39a53e0c
JK
405 if (!test_and_set_bit(segno, free_i->free_segmap)) {
406 free_i->free_segments--;
407 if (!test_and_set_bit(secno, free_i->free_secmap))
408 free_i->free_sections--;
409 }
1a118ccf 410 spin_unlock(&free_i->segmap_lock);
39a53e0c
JK
411}
412
413static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
414 void *dst_addr)
415{
416 struct sit_info *sit_i = SIT_I(sbi);
417 memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size);
418}
419
420static inline block_t written_block_count(struct f2fs_sb_info *sbi)
421{
8b8343fa 422 return SIT_I(sbi)->written_valid_blocks;
39a53e0c
JK
423}
424
425static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
426{
8b8343fa 427 return FREE_I(sbi)->free_segments;
39a53e0c
JK
428}
429
430static inline int reserved_segments(struct f2fs_sb_info *sbi)
431{
432 return SM_I(sbi)->reserved_segments;
433}
434
435static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
436{
8b8343fa 437 return FREE_I(sbi)->free_sections;
39a53e0c
JK
438}
439
440static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
441{
442 return DIRTY_I(sbi)->nr_dirty[PRE];
443}
444
445static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi)
446{
447 return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] +
448 DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] +
449 DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] +
450 DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] +
451 DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] +
452 DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE];
453}
454
455static inline int overprovision_segments(struct f2fs_sb_info *sbi)
456{
457 return SM_I(sbi)->ovp_segments;
458}
459
460static inline int overprovision_sections(struct f2fs_sb_info *sbi)
461{
462 return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec;
463}
464
465static inline int reserved_sections(struct f2fs_sb_info *sbi)
466{
467 return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec;
468}
469
470static inline bool need_SSR(struct f2fs_sb_info *sbi)
471{
95dd8973
JK
472 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
473 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
36abef4e
JK
474
475 if (test_opt(sbi, LFS))
476 return false;
477
95dd8973
JK
478 return free_sections(sbi) <= (node_secs + 2 * dent_secs +
479 reserved_sections(sbi) + 1);
39a53e0c
JK
480}
481
9b9c618f
JK
482static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
483 int freed, int needed)
39a53e0c 484{
5ac206cf
NJ
485 int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
486 int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
43727527 487
0f18b462
JK
488 node_secs += get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
489
caf0047e 490 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
029cd28c
JK
491 return false;
492
9b9c618f
JK
493 return (free_sections(sbi) + freed) <=
494 (node_secs + 2 * dent_secs + reserved_sections(sbi) + needed);
39a53e0c
JK
495}
496
81eb8d6e
JK
497static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi)
498{
6c311ec6 499 return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments;
81eb8d6e
JK
500}
501
39a53e0c
JK
502static inline int utilization(struct f2fs_sb_info *sbi)
503{
6c311ec6
CF
504 return div_u64((u64)valid_user_blocks(sbi) * 100,
505 sbi->user_block_count);
39a53e0c
JK
506}
507
508/*
509 * Sometimes f2fs may be better to drop out-of-place update policy.
216fbd64
JK
510 * And, users can control the policy through sysfs entries.
511 * There are five policies with triggering conditions as follows.
512 * F2FS_IPU_FORCE - all the time,
513 * F2FS_IPU_SSR - if SSR mode is activated,
514 * F2FS_IPU_UTIL - if FS utilization is over threashold,
515 * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over
516 * threashold,
c1ce1b02
JK
517 * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash
518 * storages. IPU will be triggered only if the # of dirty
519 * pages over min_fsync_blocks.
216fbd64 520 * F2FS_IPUT_DISABLE - disable IPU. (=default option)
39a53e0c 521 */
216fbd64 522#define DEF_MIN_IPU_UTIL 70
c1ce1b02 523#define DEF_MIN_FSYNC_BLOCKS 8
216fbd64
JK
524
525enum {
526 F2FS_IPU_FORCE,
527 F2FS_IPU_SSR,
528 F2FS_IPU_UTIL,
529 F2FS_IPU_SSR_UTIL,
c1ce1b02 530 F2FS_IPU_FSYNC,
216fbd64
JK
531};
532
39a53e0c
JK
533static inline bool need_inplace_update(struct inode *inode)
534{
4081363f 535 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9b5f136f 536 unsigned int policy = SM_I(sbi)->ipu_policy;
216fbd64
JK
537
538 /* IPU can be done only for the user data */
88b88a66 539 if (S_ISDIR(inode->i_mode) || f2fs_is_atomic_file(inode))
39a53e0c 540 return false;
216fbd64 541
36abef4e
JK
542 if (test_opt(sbi, LFS))
543 return false;
544
9b5f136f 545 if (policy & (0x1 << F2FS_IPU_FORCE))
39a53e0c 546 return true;
9b5f136f
JK
547 if (policy & (0x1 << F2FS_IPU_SSR) && need_SSR(sbi))
548 return true;
549 if (policy & (0x1 << F2FS_IPU_UTIL) &&
550 utilization(sbi) > SM_I(sbi)->min_ipu_util)
551 return true;
552 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && need_SSR(sbi) &&
553 utilization(sbi) > SM_I(sbi)->min_ipu_util)
554 return true;
555
556 /* this is only set during fdatasync */
557 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
91942321 558 is_inode_flag_set(inode, FI_NEED_IPU))
9b5f136f
JK
559 return true;
560
39a53e0c
JK
561 return false;
562}
563
564static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,
565 int type)
566{
567 struct curseg_info *curseg = CURSEG_I(sbi, type);
568 return curseg->segno;
569}
570
571static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi,
572 int type)
573{
574 struct curseg_info *curseg = CURSEG_I(sbi, type);
575 return curseg->alloc_type;
576}
577
578static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type)
579{
580 struct curseg_info *curseg = CURSEG_I(sbi, type);
581 return curseg->next_blkoff;
582}
583
584static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
585{
7a04f64d 586 f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
39a53e0c
JK
587}
588
39a53e0c
JK
589static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
590{
bb413d6a
YH
591 BUG_ON(blk_addr < SEG0_BLKADDR(sbi)
592 || blk_addr >= MAX_BLKADDR(sbi));
39a53e0c
JK
593}
594
595/*
e1c42045 596 * Summary block is always treated as an invalid block
39a53e0c
JK
597 */
598static inline void check_block_count(struct f2fs_sb_info *sbi,
599 int segno, struct f2fs_sit_entry *raw_sit)
600{
4c278394 601#ifdef CONFIG_F2FS_CHECK_FS
44c60bf2 602 bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false;
39a53e0c 603 int valid_blocks = 0;
44c60bf2 604 int cur_pos = 0, next_pos;
39a53e0c 605
39a53e0c 606 /* check bitmap with valid block count */
44c60bf2
CY
607 do {
608 if (is_valid) {
609 next_pos = find_next_zero_bit_le(&raw_sit->valid_map,
610 sbi->blocks_per_seg,
611 cur_pos);
612 valid_blocks += next_pos - cur_pos;
613 } else
614 next_pos = find_next_bit_le(&raw_sit->valid_map,
615 sbi->blocks_per_seg,
616 cur_pos);
617 cur_pos = next_pos;
618 is_valid = !is_valid;
619 } while (cur_pos < sbi->blocks_per_seg);
39a53e0c 620 BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
5d56b671 621#endif
4c278394
JK
622 /* check segment usage, and check boundary of a given segment number */
623 f2fs_bug_on(sbi, GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
624 || segno > TOTAL_SEGS(sbi) - 1);
7a04f64d 625}
39a53e0c
JK
626
627static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
628 unsigned int start)
629{
630 struct sit_info *sit_i = SIT_I(sbi);
d3a14afd 631 unsigned int offset = SIT_BLOCK_OFFSET(start);
39a53e0c
JK
632 block_t blk_addr = sit_i->sit_base_addr + offset;
633
634 check_seg_range(sbi, start);
635
636 /* calculate sit block address */
637 if (f2fs_test_bit(offset, sit_i->sit_bitmap))
638 blk_addr += sit_i->sit_blocks;
639
640 return blk_addr;
641}
642
643static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi,
644 pgoff_t block_addr)
645{
646 struct sit_info *sit_i = SIT_I(sbi);
647 block_addr -= sit_i->sit_base_addr;
648 if (block_addr < sit_i->sit_blocks)
649 block_addr += sit_i->sit_blocks;
650 else
651 block_addr -= sit_i->sit_blocks;
652
653 return block_addr + sit_i->sit_base_addr;
654}
655
656static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start)
657{
d3a14afd 658 unsigned int block_off = SIT_BLOCK_OFFSET(start);
39a53e0c 659
c6ac4c0e 660 f2fs_change_bit(block_off, sit_i->sit_bitmap);
39a53e0c
JK
661}
662
663static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi)
664{
665 struct sit_info *sit_i = SIT_I(sbi);
666 return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec -
667 sit_i->mounted_time;
668}
669
670static inline void set_summary(struct f2fs_summary *sum, nid_t nid,
671 unsigned int ofs_in_node, unsigned char version)
672{
673 sum->nid = cpu_to_le32(nid);
674 sum->ofs_in_node = cpu_to_le16(ofs_in_node);
675 sum->version = version;
676}
677
678static inline block_t start_sum_block(struct f2fs_sb_info *sbi)
679{
680 return __start_cp_addr(sbi) +
681 le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
682}
683
684static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type)
685{
686 return __start_cp_addr(sbi) +
687 le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count)
688 - (base + 1) + type;
689}
5ec4e49f
JK
690
691static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno)
692{
693 if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno))
694 return true;
695 return false;
696}
ac5d156c
JK
697
698static inline unsigned int max_hw_blocks(struct f2fs_sb_info *sbi)
699{
700 struct block_device *bdev = sbi->sb->s_bdev;
701 struct request_queue *q = bdev_get_queue(bdev);
55cf9cb6 702 return SECTOR_TO_BLOCK(queue_max_sectors(q));
ac5d156c 703}
87d6f890
JK
704
705/*
706 * It is very important to gather dirty pages and write at once, so that we can
707 * submit a big bio without interfering other data writes.
708 * By default, 512 pages for directory data,
709 * 512 pages (2MB) * 3 for three types of nodes, and
710 * max_bio_blocks for meta are set.
711 */
712static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type)
713{
a88a341a 714 if (sbi->sb->s_bdi->wb.dirty_exceeded)
510184c8
JK
715 return 0;
716
a1257023
JK
717 if (type == DATA)
718 return sbi->blocks_per_seg;
719 else if (type == NODE)
2c237eba 720 return 8 * sbi->blocks_per_seg;
87d6f890 721 else if (type == META)
2c237eba 722 return 8 * MAX_BIO_BLOCKS(sbi);
87d6f890
JK
723 else
724 return 0;
725}
50c8cdb3
JK
726
727/*
728 * When writing pages, it'd better align nr_to_write for segment size.
729 */
730static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type,
731 struct writeback_control *wbc)
732{
733 long nr_to_write, desired;
734
735 if (wbc->sync_mode != WB_SYNC_NONE)
736 return 0;
737
738 nr_to_write = wbc->nr_to_write;
739
28ea6162 740 if (type == NODE)
2c237eba 741 desired = 2 * max_hw_blocks(sbi);
50c8cdb3 742 else
90a893c7 743 desired = MAX_BIO_BLOCKS(sbi);
50c8cdb3
JK
744
745 wbc->nr_to_write = desired;
746 return desired - nr_to_write;
747}
This page took 0.174772 seconds and 5 git commands to generate.