Jaegeuk Kim | 0a8165d | 2012-11-29 13:28:09 +0900 | [diff] [blame] | 1 | /* |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | */ |
Jaegeuk Kim | ac5d156 | 2013-04-29 16:58:39 +0900 | [diff] [blame] | 11 | #include <linux/blkdev.h> |
Tejun Heo | 66114ca | 2015-05-22 17:13:32 -0400 | [diff] [blame] | 12 | #include <linux/backing-dev.h> |
Jaegeuk Kim | ac5d156 | 2013-04-29 16:58:39 +0900 | [diff] [blame] | 13 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 14 | /* constant macro */ |
| 15 | #define NULL_SEGNO ((unsigned int)(~0)) |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 16 | #define NULL_SECNO ((unsigned int)(~0)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 17 | |
Jaegeuk Kim | 58c4103 | 2014-03-19 14:17:21 +0900 | [diff] [blame] | 18 | #define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */ |
Jaegeuk Kim | 44a8349 | 2016-07-13 18:23:35 -0700 | [diff] [blame] | 19 | #define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */ |
Jaegeuk Kim | 81eb8d6 | 2013-10-24 13:31:34 +0900 | [diff] [blame] | 20 | |
Namjae Jeon | 6224da8 | 2013-04-06 14:44:32 +0900 | [diff] [blame] | 21 | /* L: Logical segment # in volume, R: Relative segment # in main area */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | |
Changman Lee | 61ae45c | 2013-11-21 20:04:21 +0900 | [diff] [blame] | 25 | #define IS_DATASEG(t) (t <= CURSEG_COLD_DATA) |
| 26 | #define IS_NODESEG(t) (t >= CURSEG_HOT_NODE) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 27 | |
Jaegeuk Kim | 5c773ba | 2013-03-31 12:30:04 +0900 | [diff] [blame] | 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)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 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)) |
Dan Carpenter | 8a21984 | 2014-09-25 14:39:17 +0300 | [diff] [blame] | 60 | #define SEGMENT_SIZE(sbi) (1ULL << (sbi->log_blocksize + \ |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 61 | sbi->log_blocks_per_seg)) |
| 62 | |
| 63 | #define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 64 | (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg)) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 65 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 66 | #define NEXT_FREE_BLKADDR(sbi, curseg) \ |
| 67 | (START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff) |
| 68 | |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 69 | #define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) ((blk_addr) - SEG0_BLKADDR(sbi)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 70 | #define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \ |
| 71 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg) |
Jaegeuk Kim | 491c085 | 2014-02-04 13:01:10 +0900 | [diff] [blame] | 72 | #define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \ |
| 73 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1)) |
| 74 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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) |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 92 | #define SIT_BLOCK_OFFSET(segno) \ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 93 | (segno / SIT_ENTRY_PER_BLOCK) |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 94 | #define START_SEGNO(segno) \ |
| 95 | (SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK) |
Chao Yu | 74de593 | 2013-11-22 09:09:59 +0800 | [diff] [blame] | 96 | #define SIT_BLK_CNT(sbi) \ |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 97 | ((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 98 | #define f2fs_bitmap_size(nr) \ |
| 99 | (BITS_TO_LONGS(nr) * sizeof(unsigned long)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 100 | |
Chao Yu | 55cf9cb | 2014-09-15 18:01:10 +0800 | [diff] [blame] | 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) |
Jaegeuk Kim | 90a893c | 2014-09-22 16:21:07 -0700 | [diff] [blame] | 105 | #define MAX_BIO_BLOCKS(sbi) \ |
| 106 | ((int)min((int)max_hw_blocks(sbi), BIO_MAX_PAGES)) |
Jaegeuk Kim | 3cd8a23 | 2012-12-10 09:26:05 +0900 | [diff] [blame] | 107 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | */ |
| 113 | enum { |
| 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 | */ |
| 123 | enum { |
| 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 | */ |
| 133 | enum { |
| 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. |
Jaegeuk Kim | 6aefd93 | 2015-10-05 11:02:54 -0700 | [diff] [blame] | 141 | * FORCE_FG_GC means on-demand cleaning job in background. |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 142 | */ |
| 143 | enum { |
| 144 | BG_GC = 0, |
Jaegeuk Kim | 6aefd93 | 2015-10-05 11:02:54 -0700 | [diff] [blame] | 145 | FG_GC, |
| 146 | FORCE_FG_GC, |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 147 | }; |
| 148 | |
| 149 | /* for a function parameter to select a victim segment */ |
| 150 | struct 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 */ |
Jin Xu | a26b7c8 | 2013-09-05 12:45:26 +0800 | [diff] [blame] | 154 | unsigned int max_search; /* maximum # of segments to search */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | |
| 161 | struct seg_entry { |
Chao Yu | f51b4ce | 2016-05-04 23:19:48 +0800 | [diff] [blame] | 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 */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | */ |
Chao Yu | f51b4ce | 2016-05-04 23:19:48 +0800 | [diff] [blame] | 171 | unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */ |
Jaegeuk Kim | a66cdd9 | 2015-04-30 22:37:50 -0700 | [diff] [blame] | 172 | unsigned char *discard_map; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 173 | unsigned long long mtime; /* modification time of the segment */ |
| 174 | }; |
| 175 | |
| 176 | struct sec_entry { |
| 177 | unsigned int valid_blocks; /* # of valid blocks in a section */ |
| 178 | }; |
| 179 | |
| 180 | struct segment_allocation { |
| 181 | void (*allocate_segment)(struct f2fs_sb_info *, int, bool); |
| 182 | }; |
| 183 | |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 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 | */ |
Jaegeuk Kim | d48dfc2 | 2016-01-29 16:21:15 -0800 | [diff] [blame] | 188 | #define ATOMIC_WRITTEN_PAGE ((unsigned long)-1) |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 189 | |
| 190 | #define IS_ATOMIC_WRITTEN_PAGE(page) \ |
| 191 | (page_private(page) == (unsigned long)ATOMIC_WRITTEN_PAGE) |
| 192 | |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 193 | struct inmem_pages { |
| 194 | struct list_head list; |
| 195 | struct page *page; |
Chao Yu | 28bc106 | 2016-02-06 14:40:34 +0800 | [diff] [blame] | 196 | block_t old_addr; /* for revoking when fail to commit */ |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 197 | }; |
| 198 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 199 | struct 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 | |
Jaegeuk Kim | 60a3b78 | 2015-02-10 16:44:29 -0800 | [diff] [blame] | 208 | unsigned long *tmp_map; /* bitmap for temporal use */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | |
| 223 | struct 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 */ |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 227 | spinlock_t segmap_lock; /* free segmap lock */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 */ |
| 233 | enum 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 | |
| 245 | struct 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 */ |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 250 | unsigned long *victim_secmap; /* background GC victims */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 251 | }; |
| 252 | |
| 253 | /* victim selection function for cleaning and SSR */ |
| 254 | struct victim_selection { |
| 255 | int (*get_victim)(struct f2fs_sb_info *, unsigned int *, |
| 256 | int, int, char); |
| 257 | }; |
| 258 | |
| 259 | /* for active log information */ |
| 260 | struct curseg_info { |
| 261 | struct mutex curseg_mutex; /* lock for consistency */ |
| 262 | struct f2fs_summary_block *sum_blk; /* cached summary block */ |
Chao Yu | b7ad751 | 2016-02-19 18:08:46 +0800 | [diff] [blame] | 263 | struct rw_semaphore journal_rwsem; /* protect journal area */ |
| 264 | struct f2fs_journal *journal; /* cached journal info */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | |
Chao Yu | 184a5cd | 2014-09-04 18:13:01 +0800 | [diff] [blame] | 272 | struct 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 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 278 | /* |
| 279 | * inline functions |
| 280 | */ |
| 281 | static 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 | |
| 286 | static 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 | |
| 293 | static 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 | |
| 300 | static 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 | |
| 313 | static 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 | |
| 324 | static 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 | |
| 336 | static inline unsigned int find_next_inuse(struct free_segmap_info *free_i, |
| 337 | unsigned int max, unsigned int segno) |
| 338 | { |
| 339 | unsigned int ret; |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 340 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 341 | ret = find_next_bit(free_i->free_segmap, max, segno); |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 342 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 343 | return ret; |
| 344 | } |
| 345 | |
| 346 | static 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 | |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 353 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 354 | clear_bit(segno, free_i->free_segmap); |
| 355 | free_i->free_segments++; |
| 356 | |
Wanpeng Li | 7fd9701 | 2015-03-06 15:00:55 +0800 | [diff] [blame] | 357 | next = find_next_bit(free_i->free_segmap, |
| 358 | start_segno + sbi->segs_per_sec, start_segno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 359 | if (next >= start_segno + sbi->segs_per_sec) { |
| 360 | clear_bit(secno, free_i->free_secmap); |
| 361 | free_i->free_sections++; |
| 362 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 363 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | static 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 | |
| 377 | static 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 | |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 385 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 386 | if (test_and_clear_bit(segno, free_i->free_segmap)) { |
| 387 | free_i->free_segments++; |
| 388 | |
Chao Yu | f1121ab | 2014-07-14 16:45:15 +0800 | [diff] [blame] | 389 | next = find_next_bit(free_i->free_segmap, |
| 390 | start_segno + sbi->segs_per_sec, start_segno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 396 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | static 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; |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 404 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 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 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 410 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | static 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 | |
| 420 | static inline block_t written_block_count(struct f2fs_sb_info *sbi) |
| 421 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 422 | return SIT_I(sbi)->written_valid_blocks; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | static inline unsigned int free_segments(struct f2fs_sb_info *sbi) |
| 426 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 427 | return FREE_I(sbi)->free_segments; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | static inline int reserved_segments(struct f2fs_sb_info *sbi) |
| 431 | { |
| 432 | return SM_I(sbi)->reserved_segments; |
| 433 | } |
| 434 | |
| 435 | static inline unsigned int free_sections(struct f2fs_sb_info *sbi) |
| 436 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 437 | return FREE_I(sbi)->free_sections; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi) |
| 441 | { |
| 442 | return DIRTY_I(sbi)->nr_dirty[PRE]; |
| 443 | } |
| 444 | |
| 445 | static 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 | |
| 455 | static inline int overprovision_segments(struct f2fs_sb_info *sbi) |
| 456 | { |
| 457 | return SM_I(sbi)->ovp_segments; |
| 458 | } |
| 459 | |
| 460 | static inline int overprovision_sections(struct f2fs_sb_info *sbi) |
| 461 | { |
| 462 | return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec; |
| 463 | } |
| 464 | |
| 465 | static inline int reserved_sections(struct f2fs_sb_info *sbi) |
| 466 | { |
| 467 | return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec; |
| 468 | } |
| 469 | |
| 470 | static inline bool need_SSR(struct f2fs_sb_info *sbi) |
| 471 | { |
Jaegeuk Kim | 95dd897 | 2014-09-17 17:52:58 -0700 | [diff] [blame] | 472 | int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); |
| 473 | int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); |
Jaegeuk Kim | b9610bd | 2016-10-14 13:28:05 -0700 | [diff] [blame^] | 474 | int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); |
Jaegeuk Kim | 36abef4 | 2016-06-03 19:29:38 -0700 | [diff] [blame] | 475 | |
| 476 | if (test_opt(sbi, LFS)) |
| 477 | return false; |
| 478 | |
Jaegeuk Kim | b9610bd | 2016-10-14 13:28:05 -0700 | [diff] [blame^] | 479 | return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs + |
Jaegeuk Kim | 95dd897 | 2014-09-17 17:52:58 -0700 | [diff] [blame] | 480 | reserved_sections(sbi) + 1); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 481 | } |
| 482 | |
Jaegeuk Kim | 7f3037a | 2016-09-01 12:02:51 -0700 | [diff] [blame] | 483 | static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, |
| 484 | int freed, int needed) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 485 | { |
Namjae Jeon | 5ac206c | 2013-02-02 23:52:59 +0900 | [diff] [blame] | 486 | int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); |
| 487 | int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); |
Jaegeuk Kim | b9610bd | 2016-10-14 13:28:05 -0700 | [diff] [blame^] | 488 | int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); |
Jaegeuk Kim | 0f18b46 | 2016-05-20 11:10:10 -0700 | [diff] [blame] | 489 | |
Chao Yu | caf0047 | 2015-01-28 17:48:42 +0800 | [diff] [blame] | 490 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
Jaegeuk Kim | 029cd28 | 2012-12-21 17:20:21 +0900 | [diff] [blame] | 491 | return false; |
| 492 | |
Jaegeuk Kim | 7f3037a | 2016-09-01 12:02:51 -0700 | [diff] [blame] | 493 | return (free_sections(sbi) + freed) <= |
Jaegeuk Kim | b9610bd | 2016-10-14 13:28:05 -0700 | [diff] [blame^] | 494 | (node_secs + 2 * dent_secs + imeta_secs + |
| 495 | reserved_sections(sbi) + needed); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 496 | } |
| 497 | |
Jaegeuk Kim | 81eb8d6 | 2013-10-24 13:31:34 +0900 | [diff] [blame] | 498 | static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi) |
| 499 | { |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 500 | return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments; |
Jaegeuk Kim | 81eb8d6 | 2013-10-24 13:31:34 +0900 | [diff] [blame] | 501 | } |
| 502 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 503 | static inline int utilization(struct f2fs_sb_info *sbi) |
| 504 | { |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 505 | return div_u64((u64)valid_user_blocks(sbi) * 100, |
| 506 | sbi->user_block_count); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Sometimes f2fs may be better to drop out-of-place update policy. |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 511 | * And, users can control the policy through sysfs entries. |
| 512 | * There are five policies with triggering conditions as follows. |
| 513 | * F2FS_IPU_FORCE - all the time, |
| 514 | * F2FS_IPU_SSR - if SSR mode is activated, |
| 515 | * F2FS_IPU_UTIL - if FS utilization is over threashold, |
| 516 | * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over |
| 517 | * threashold, |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 518 | * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash |
| 519 | * storages. IPU will be triggered only if the # of dirty |
| 520 | * pages over min_fsync_blocks. |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 521 | * F2FS_IPUT_DISABLE - disable IPU. (=default option) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 522 | */ |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 523 | #define DEF_MIN_IPU_UTIL 70 |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 524 | #define DEF_MIN_FSYNC_BLOCKS 8 |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 525 | |
| 526 | enum { |
| 527 | F2FS_IPU_FORCE, |
| 528 | F2FS_IPU_SSR, |
| 529 | F2FS_IPU_UTIL, |
| 530 | F2FS_IPU_SSR_UTIL, |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 531 | F2FS_IPU_FSYNC, |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 532 | }; |
| 533 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 534 | static inline bool need_inplace_update(struct inode *inode) |
| 535 | { |
Jaegeuk Kim | 4081363 | 2014-09-02 15:31:18 -0700 | [diff] [blame] | 536 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
Jaegeuk Kim | 9b5f136 | 2014-09-16 18:30:54 -0700 | [diff] [blame] | 537 | unsigned int policy = SM_I(sbi)->ipu_policy; |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 538 | |
| 539 | /* IPU can be done only for the user data */ |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 540 | if (S_ISDIR(inode->i_mode) || f2fs_is_atomic_file(inode)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 541 | return false; |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 542 | |
Jaegeuk Kim | 36abef4 | 2016-06-03 19:29:38 -0700 | [diff] [blame] | 543 | if (test_opt(sbi, LFS)) |
| 544 | return false; |
| 545 | |
Jaegeuk Kim | 9b5f136 | 2014-09-16 18:30:54 -0700 | [diff] [blame] | 546 | if (policy & (0x1 << F2FS_IPU_FORCE)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 547 | return true; |
Jaegeuk Kim | 9b5f136 | 2014-09-16 18:30:54 -0700 | [diff] [blame] | 548 | if (policy & (0x1 << F2FS_IPU_SSR) && need_SSR(sbi)) |
| 549 | return true; |
| 550 | if (policy & (0x1 << F2FS_IPU_UTIL) && |
| 551 | utilization(sbi) > SM_I(sbi)->min_ipu_util) |
| 552 | return true; |
| 553 | if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && need_SSR(sbi) && |
| 554 | utilization(sbi) > SM_I(sbi)->min_ipu_util) |
| 555 | return true; |
| 556 | |
| 557 | /* this is only set during fdatasync */ |
| 558 | if (policy & (0x1 << F2FS_IPU_FSYNC) && |
Jaegeuk Kim | 9194232 | 2016-05-20 10:13:22 -0700 | [diff] [blame] | 559 | is_inode_flag_set(inode, FI_NEED_IPU)) |
Jaegeuk Kim | 9b5f136 | 2014-09-16 18:30:54 -0700 | [diff] [blame] | 560 | return true; |
| 561 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 562 | return false; |
| 563 | } |
| 564 | |
| 565 | static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, |
| 566 | int type) |
| 567 | { |
| 568 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 569 | return curseg->segno; |
| 570 | } |
| 571 | |
| 572 | static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi, |
| 573 | int type) |
| 574 | { |
| 575 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 576 | return curseg->alloc_type; |
| 577 | } |
| 578 | |
| 579 | static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type) |
| 580 | { |
| 581 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 582 | return curseg->next_blkoff; |
| 583 | } |
| 584 | |
| 585 | static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno) |
| 586 | { |
Liu Xue | 7a04f64 | 2015-07-27 10:17:59 +0000 | [diff] [blame] | 587 | f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 588 | } |
| 589 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 590 | static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr) |
| 591 | { |
Yunlei He | bb413d6 | 2016-07-28 12:12:38 +0800 | [diff] [blame] | 592 | BUG_ON(blk_addr < SEG0_BLKADDR(sbi) |
| 593 | || blk_addr >= MAX_BLKADDR(sbi)); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | /* |
arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 597 | * Summary block is always treated as an invalid block |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 598 | */ |
| 599 | static inline void check_block_count(struct f2fs_sb_info *sbi, |
| 600 | int segno, struct f2fs_sit_entry *raw_sit) |
| 601 | { |
Jaegeuk Kim | 4c27839 | 2015-08-11 16:01:30 -0700 | [diff] [blame] | 602 | #ifdef CONFIG_F2FS_CHECK_FS |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 603 | bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 604 | int valid_blocks = 0; |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 605 | int cur_pos = 0, next_pos; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 606 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 607 | /* check bitmap with valid block count */ |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 608 | do { |
| 609 | if (is_valid) { |
| 610 | next_pos = find_next_zero_bit_le(&raw_sit->valid_map, |
| 611 | sbi->blocks_per_seg, |
| 612 | cur_pos); |
| 613 | valid_blocks += next_pos - cur_pos; |
| 614 | } else |
| 615 | next_pos = find_next_bit_le(&raw_sit->valid_map, |
| 616 | sbi->blocks_per_seg, |
| 617 | cur_pos); |
| 618 | cur_pos = next_pos; |
| 619 | is_valid = !is_valid; |
| 620 | } while (cur_pos < sbi->blocks_per_seg); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 621 | BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks); |
Jaegeuk Kim | 5d56b67 | 2013-10-29 15:14:54 +0900 | [diff] [blame] | 622 | #endif |
Jaegeuk Kim | 4c27839 | 2015-08-11 16:01:30 -0700 | [diff] [blame] | 623 | /* check segment usage, and check boundary of a given segment number */ |
| 624 | f2fs_bug_on(sbi, GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg |
| 625 | || segno > TOTAL_SEGS(sbi) - 1); |
Liu Xue | 7a04f64 | 2015-07-27 10:17:59 +0000 | [diff] [blame] | 626 | } |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 627 | |
| 628 | static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, |
| 629 | unsigned int start) |
| 630 | { |
| 631 | struct sit_info *sit_i = SIT_I(sbi); |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 632 | unsigned int offset = SIT_BLOCK_OFFSET(start); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 633 | block_t blk_addr = sit_i->sit_base_addr + offset; |
| 634 | |
| 635 | check_seg_range(sbi, start); |
| 636 | |
| 637 | /* calculate sit block address */ |
| 638 | if (f2fs_test_bit(offset, sit_i->sit_bitmap)) |
| 639 | blk_addr += sit_i->sit_blocks; |
| 640 | |
| 641 | return blk_addr; |
| 642 | } |
| 643 | |
| 644 | static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi, |
| 645 | pgoff_t block_addr) |
| 646 | { |
| 647 | struct sit_info *sit_i = SIT_I(sbi); |
| 648 | block_addr -= sit_i->sit_base_addr; |
| 649 | if (block_addr < sit_i->sit_blocks) |
| 650 | block_addr += sit_i->sit_blocks; |
| 651 | else |
| 652 | block_addr -= sit_i->sit_blocks; |
| 653 | |
| 654 | return block_addr + sit_i->sit_base_addr; |
| 655 | } |
| 656 | |
| 657 | static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start) |
| 658 | { |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 659 | unsigned int block_off = SIT_BLOCK_OFFSET(start); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 660 | |
Gu Zheng | c6ac4c0 | 2014-10-20 17:45:50 +0800 | [diff] [blame] | 661 | f2fs_change_bit(block_off, sit_i->sit_bitmap); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi) |
| 665 | { |
| 666 | struct sit_info *sit_i = SIT_I(sbi); |
| 667 | return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec - |
| 668 | sit_i->mounted_time; |
| 669 | } |
| 670 | |
| 671 | static inline void set_summary(struct f2fs_summary *sum, nid_t nid, |
| 672 | unsigned int ofs_in_node, unsigned char version) |
| 673 | { |
| 674 | sum->nid = cpu_to_le32(nid); |
| 675 | sum->ofs_in_node = cpu_to_le16(ofs_in_node); |
| 676 | sum->version = version; |
| 677 | } |
| 678 | |
| 679 | static inline block_t start_sum_block(struct f2fs_sb_info *sbi) |
| 680 | { |
| 681 | return __start_cp_addr(sbi) + |
| 682 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); |
| 683 | } |
| 684 | |
| 685 | static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) |
| 686 | { |
| 687 | return __start_cp_addr(sbi) + |
| 688 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count) |
| 689 | - (base + 1) + type; |
| 690 | } |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 691 | |
| 692 | static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno) |
| 693 | { |
| 694 | if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno)) |
| 695 | return true; |
| 696 | return false; |
| 697 | } |
Jaegeuk Kim | ac5d156 | 2013-04-29 16:58:39 +0900 | [diff] [blame] | 698 | |
| 699 | static inline unsigned int max_hw_blocks(struct f2fs_sb_info *sbi) |
| 700 | { |
| 701 | struct block_device *bdev = sbi->sb->s_bdev; |
| 702 | struct request_queue *q = bdev_get_queue(bdev); |
Chao Yu | 55cf9cb | 2014-09-15 18:01:10 +0800 | [diff] [blame] | 703 | return SECTOR_TO_BLOCK(queue_max_sectors(q)); |
Jaegeuk Kim | ac5d156 | 2013-04-29 16:58:39 +0900 | [diff] [blame] | 704 | } |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 705 | |
| 706 | /* |
| 707 | * It is very important to gather dirty pages and write at once, so that we can |
| 708 | * submit a big bio without interfering other data writes. |
| 709 | * By default, 512 pages for directory data, |
| 710 | * 512 pages (2MB) * 3 for three types of nodes, and |
| 711 | * max_bio_blocks for meta are set. |
| 712 | */ |
| 713 | static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type) |
| 714 | { |
Tejun Heo | a88a341 | 2015-05-22 17:13:28 -0400 | [diff] [blame] | 715 | if (sbi->sb->s_bdi->wb.dirty_exceeded) |
Jaegeuk Kim | 510184c | 2014-11-06 17:23:08 -0800 | [diff] [blame] | 716 | return 0; |
| 717 | |
Jaegeuk Kim | a125702 | 2015-10-08 10:40:07 -0700 | [diff] [blame] | 718 | if (type == DATA) |
| 719 | return sbi->blocks_per_seg; |
| 720 | else if (type == NODE) |
Jaegeuk Kim | 2c237eb | 2016-06-16 16:44:11 -0700 | [diff] [blame] | 721 | return 8 * sbi->blocks_per_seg; |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 722 | else if (type == META) |
Jaegeuk Kim | 2c237eb | 2016-06-16 16:44:11 -0700 | [diff] [blame] | 723 | return 8 * MAX_BIO_BLOCKS(sbi); |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 724 | else |
| 725 | return 0; |
| 726 | } |
Jaegeuk Kim | 50c8cdb | 2014-03-18 13:47:11 +0900 | [diff] [blame] | 727 | |
| 728 | /* |
| 729 | * When writing pages, it'd better align nr_to_write for segment size. |
| 730 | */ |
| 731 | static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type, |
| 732 | struct writeback_control *wbc) |
| 733 | { |
| 734 | long nr_to_write, desired; |
| 735 | |
| 736 | if (wbc->sync_mode != WB_SYNC_NONE) |
| 737 | return 0; |
| 738 | |
| 739 | nr_to_write = wbc->nr_to_write; |
| 740 | |
Jaegeuk Kim | 28ea616 | 2016-05-25 17:17:56 -0700 | [diff] [blame] | 741 | if (type == NODE) |
Jaegeuk Kim | 2c237eb | 2016-06-16 16:44:11 -0700 | [diff] [blame] | 742 | desired = 2 * max_hw_blocks(sbi); |
Jaegeuk Kim | 50c8cdb | 2014-03-18 13:47:11 +0900 | [diff] [blame] | 743 | else |
Jaegeuk Kim | 90a893c | 2014-09-22 16:21:07 -0700 | [diff] [blame] | 744 | desired = MAX_BIO_BLOCKS(sbi); |
Jaegeuk Kim | 50c8cdb | 2014-03-18 13:47:11 +0900 | [diff] [blame] | 745 | |
| 746 | wbc->nr_to_write = desired; |
| 747 | return desired - nr_to_write; |
| 748 | } |