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 | |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 21 | #define F2FS_MIN_SEGMENTS 9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 22 | |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 23 | /* L: Logical segment # in volume, R: Relative segment # in main area */ |
| 24 | #define GET_L2R_SEGNO(free_i, segno) ((segno) - (free_i)->start_segno) |
| 25 | #define GET_R2L_SEGNO(free_i, segno) ((segno) + (free_i)->start_segno) |
| 26 | |
| 27 | #define IS_DATASEG(t) ((t) <= CURSEG_COLD_DATA) |
| 28 | #define IS_NODESEG(t) ((t) >= CURSEG_HOT_NODE) |
| 29 | |
| 30 | #define IS_HOT(t) ((t) == CURSEG_HOT_NODE || (t) == CURSEG_HOT_DATA) |
| 31 | #define IS_WARM(t) ((t) == CURSEG_WARM_NODE || (t) == CURSEG_WARM_DATA) |
| 32 | #define IS_COLD(t) ((t) == CURSEG_COLD_NODE || (t) == CURSEG_COLD_DATA) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 33 | |
Jaegeuk Kim | 5c773ba | 2013-03-31 12:30:04 +0900 | [diff] [blame] | 34 | #define IS_CURSEG(sbi, seg) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 35 | (((seg) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \ |
| 36 | ((seg) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \ |
| 37 | ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \ |
| 38 | ((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \ |
| 39 | ((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \ |
| 40 | ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 41 | |
| 42 | #define IS_CURSEC(sbi, secno) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 43 | (((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \ |
| 44 | (sbi)->segs_per_sec) || \ |
| 45 | ((secno) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \ |
| 46 | (sbi)->segs_per_sec) || \ |
| 47 | ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \ |
| 48 | (sbi)->segs_per_sec) || \ |
| 49 | ((secno) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \ |
| 50 | (sbi)->segs_per_sec) || \ |
| 51 | ((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \ |
| 52 | (sbi)->segs_per_sec) || \ |
| 53 | ((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \ |
| 54 | (sbi)->segs_per_sec)) \ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 55 | |
Jaegeuk Kim | d919765 | 2018-01-05 10:44:52 -0800 | [diff] [blame] | 56 | #define MAIN_BLKADDR(sbi) \ |
| 57 | (SM_I(sbi) ? SM_I(sbi)->main_blkaddr : \ |
| 58 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->main_blkaddr)) |
| 59 | #define SEG0_BLKADDR(sbi) \ |
| 60 | (SM_I(sbi) ? SM_I(sbi)->seg0_blkaddr : \ |
| 61 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment0_blkaddr)) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 62 | |
| 63 | #define MAIN_SEGS(sbi) (SM_I(sbi)->main_segments) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 64 | #define MAIN_SECS(sbi) ((sbi)->total_sections) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 65 | |
Jaegeuk Kim | d919765 | 2018-01-05 10:44:52 -0800 | [diff] [blame] | 66 | #define TOTAL_SEGS(sbi) \ |
| 67 | (SM_I(sbi) ? SM_I(sbi)->segment_count : \ |
| 68 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count)) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 69 | #define TOTAL_BLKS(sbi) (TOTAL_SEGS(sbi) << (sbi)->log_blocks_per_seg) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 70 | |
| 71 | #define MAX_BLKADDR(sbi) (SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi)) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 72 | #define SEGMENT_SIZE(sbi) (1ULL << ((sbi)->log_blocksize + \ |
| 73 | (sbi)->log_blocks_per_seg)) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 74 | |
| 75 | #define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 76 | (GET_R2L_SEGNO(FREE_I(sbi), segno) << (sbi)->log_blocks_per_seg)) |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 77 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 78 | #define NEXT_FREE_BLKADDR(sbi, curseg) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 79 | (START_BLOCK(sbi, (curseg)->segno) + (curseg)->next_blkoff) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 80 | |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 81 | #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] | 82 | #define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 83 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> (sbi)->log_blocks_per_seg) |
Jaegeuk Kim | 491c085 | 2014-02-04 13:01:10 +0900 | [diff] [blame] | 84 | #define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 85 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1)) |
Jaegeuk Kim | 491c085 | 2014-02-04 13:01:10 +0900 | [diff] [blame] | 86 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 87 | #define GET_SEGNO(sbi, blk_addr) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 88 | ((((blk_addr) == NULL_ADDR) || ((blk_addr) == NEW_ADDR)) ? \ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 89 | NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \ |
| 90 | GET_SEGNO_FROM_SEG0(sbi, blk_addr))) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 91 | #define BLKS_PER_SEC(sbi) \ |
| 92 | ((sbi)->segs_per_sec * (sbi)->blocks_per_seg) |
| 93 | #define GET_SEC_FROM_SEG(sbi, segno) \ |
| 94 | ((segno) / (sbi)->segs_per_sec) |
| 95 | #define GET_SEG_FROM_SEC(sbi, secno) \ |
| 96 | ((secno) * (sbi)->segs_per_sec) |
| 97 | #define GET_ZONE_FROM_SEC(sbi, secno) \ |
| 98 | ((secno) / (sbi)->secs_per_zone) |
| 99 | #define GET_ZONE_FROM_SEG(sbi, segno) \ |
| 100 | GET_ZONE_FROM_SEC(sbi, GET_SEC_FROM_SEG(sbi, segno)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 101 | |
| 102 | #define GET_SUM_BLOCK(sbi, segno) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 103 | ((sbi)->sm_info->ssa_blkaddr + (segno)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 104 | |
| 105 | #define GET_SUM_TYPE(footer) ((footer)->entry_type) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 106 | #define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 107 | |
| 108 | #define SIT_ENTRY_OFFSET(sit_i, segno) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 109 | ((segno) % (sit_i)->sents_per_block) |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 110 | #define SIT_BLOCK_OFFSET(segno) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 111 | ((segno) / SIT_ENTRY_PER_BLOCK) |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 112 | #define START_SEGNO(segno) \ |
| 113 | (SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK) |
Chao Yu | 74de593 | 2013-11-22 09:09:59 +0800 | [diff] [blame] | 114 | #define SIT_BLK_CNT(sbi) \ |
Jaegeuk Kim | 7cd8558 | 2014-09-23 11:23:01 -0700 | [diff] [blame] | 115 | ((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 116 | #define f2fs_bitmap_size(nr) \ |
| 117 | (BITS_TO_LONGS(nr) * sizeof(unsigned long)) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 118 | |
Chao Yu | 55cf9cb | 2014-09-15 18:01:10 +0800 | [diff] [blame] | 119 | #define SECTOR_FROM_BLOCK(blk_addr) \ |
| 120 | (((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK) |
| 121 | #define SECTOR_TO_BLOCK(sectors) \ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 122 | ((sectors) >> F2FS_LOG_SECTORS_PER_BLOCK) |
Jaegeuk Kim | 3cd8a23 | 2012-12-10 09:26:05 +0900 | [diff] [blame] | 123 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 124 | /* |
| 125 | * indicate a block allocation direction: RIGHT and LEFT. |
| 126 | * RIGHT means allocating new sections towards the end of volume. |
| 127 | * LEFT means the opposite direction. |
| 128 | */ |
| 129 | enum { |
| 130 | ALLOC_RIGHT = 0, |
| 131 | ALLOC_LEFT |
| 132 | }; |
| 133 | |
| 134 | /* |
| 135 | * In the victim_sel_policy->alloc_mode, there are two block allocation modes. |
| 136 | * LFS writes data sequentially with cleaning operations. |
| 137 | * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations. |
| 138 | */ |
| 139 | enum { |
| 140 | LFS = 0, |
| 141 | SSR |
| 142 | }; |
| 143 | |
| 144 | /* |
| 145 | * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes. |
| 146 | * GC_CB is based on cost-benefit algorithm. |
| 147 | * GC_GREEDY is based on greedy algorithm. |
| 148 | */ |
| 149 | enum { |
| 150 | GC_CB = 0, |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 151 | GC_GREEDY, |
| 152 | ALLOC_NEXT, |
| 153 | FLUSH_DEVICE, |
| 154 | MAX_GC_POLICY, |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | /* |
| 158 | * BG_GC means the background cleaning job. |
| 159 | * FG_GC means the on-demand cleaning job. |
Jaegeuk Kim | 6aefd93 | 2015-10-05 11:02:54 -0700 | [diff] [blame] | 160 | * FORCE_FG_GC means on-demand cleaning job in background. |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 161 | */ |
| 162 | enum { |
| 163 | BG_GC = 0, |
Jaegeuk Kim | 6aefd93 | 2015-10-05 11:02:54 -0700 | [diff] [blame] | 164 | FG_GC, |
| 165 | FORCE_FG_GC, |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 166 | }; |
| 167 | |
| 168 | /* for a function parameter to select a victim segment */ |
| 169 | struct victim_sel_policy { |
| 170 | int alloc_mode; /* LFS or SSR */ |
| 171 | int gc_mode; /* GC_CB or GC_GREEDY */ |
| 172 | unsigned long *dirty_segmap; /* dirty segment bitmap */ |
Jin Xu | a26b7c8 | 2013-09-05 12:45:26 +0800 | [diff] [blame] | 173 | unsigned int max_search; /* maximum # of segments to search */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 174 | unsigned int offset; /* last scanned bitmap offset */ |
| 175 | unsigned int ofs_unit; /* bitmap search unit */ |
| 176 | unsigned int min_cost; /* minimum cost */ |
| 177 | unsigned int min_segno; /* segment # having min. cost */ |
| 178 | }; |
| 179 | |
| 180 | struct seg_entry { |
Chao Yu | f51b4ce | 2016-05-04 23:19:48 +0800 | [diff] [blame] | 181 | unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */ |
| 182 | unsigned int valid_blocks:10; /* # of valid blocks */ |
| 183 | unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */ |
| 184 | unsigned int padding:6; /* padding */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 185 | unsigned char *cur_valid_map; /* validity bitmap of blocks */ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 186 | #ifdef CONFIG_F2FS_CHECK_FS |
| 187 | unsigned char *cur_valid_map_mir; /* mirror of current valid bitmap */ |
| 188 | #endif |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 189 | /* |
| 190 | * # of valid blocks and the validity bitmap stored in the the last |
| 191 | * checkpoint pack. This information is used by the SSR mode. |
| 192 | */ |
Chao Yu | f51b4ce | 2016-05-04 23:19:48 +0800 | [diff] [blame] | 193 | unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */ |
Jaegeuk Kim | a66cdd9 | 2015-04-30 22:37:50 -0700 | [diff] [blame] | 194 | unsigned char *discard_map; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 195 | unsigned long long mtime; /* modification time of the segment */ |
| 196 | }; |
| 197 | |
| 198 | struct sec_entry { |
| 199 | unsigned int valid_blocks; /* # of valid blocks in a section */ |
| 200 | }; |
| 201 | |
| 202 | struct segment_allocation { |
| 203 | void (*allocate_segment)(struct f2fs_sb_info *, int, bool); |
| 204 | }; |
| 205 | |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 206 | /* |
| 207 | * this value is set in page as a private data which indicate that |
| 208 | * the page is atomically written, and it is in inmem_pages list. |
| 209 | */ |
Jaegeuk Kim | d48dfc2 | 2016-01-29 16:21:15 -0800 | [diff] [blame] | 210 | #define ATOMIC_WRITTEN_PAGE ((unsigned long)-1) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 211 | #define DUMMY_WRITTEN_PAGE ((unsigned long)-2) |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 212 | |
| 213 | #define IS_ATOMIC_WRITTEN_PAGE(page) \ |
| 214 | (page_private(page) == (unsigned long)ATOMIC_WRITTEN_PAGE) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 215 | #define IS_DUMMY_WRITTEN_PAGE(page) \ |
| 216 | (page_private(page) == (unsigned long)DUMMY_WRITTEN_PAGE) |
Chao Yu | decd36b | 2015-08-07 18:42:09 +0800 | [diff] [blame] | 217 | |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 218 | struct inmem_pages { |
| 219 | struct list_head list; |
| 220 | struct page *page; |
Chao Yu | 28bc106 | 2016-02-06 14:40:34 +0800 | [diff] [blame] | 221 | block_t old_addr; /* for revoking when fail to commit */ |
Jaegeuk Kim | 88b88a6 | 2014-10-06 17:39:50 -0700 | [diff] [blame] | 222 | }; |
| 223 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 224 | struct sit_info { |
| 225 | const struct segment_allocation *s_ops; |
| 226 | |
| 227 | block_t sit_base_addr; /* start block address of SIT area */ |
| 228 | block_t sit_blocks; /* # of blocks used by SIT area */ |
| 229 | block_t written_valid_blocks; /* # of valid blocks in main area */ |
| 230 | char *sit_bitmap; /* SIT bitmap pointer */ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 231 | #ifdef CONFIG_F2FS_CHECK_FS |
| 232 | char *sit_bitmap_mir; /* SIT bitmap mirror */ |
| 233 | #endif |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 234 | unsigned int bitmap_size; /* SIT bitmap size */ |
| 235 | |
Jaegeuk Kim | 60a3b78 | 2015-02-10 16:44:29 -0800 | [diff] [blame] | 236 | unsigned long *tmp_map; /* bitmap for temporal use */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 237 | unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */ |
| 238 | unsigned int dirty_sentries; /* # of dirty sentries */ |
| 239 | unsigned int sents_per_block; /* # of SIT entries per block */ |
Jaegeuk Kim | 8ae26d1 | 2017-09-23 17:02:18 +0800 | [diff] [blame] | 240 | struct rw_semaphore sentry_lock; /* to protect SIT cache */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 241 | struct seg_entry *sentries; /* SIT segment-level cache */ |
| 242 | struct sec_entry *sec_entries; /* SIT section-level cache */ |
| 243 | |
| 244 | /* for cost-benefit algorithm in cleaning procedure */ |
| 245 | unsigned long long elapsed_time; /* elapsed time after mount */ |
| 246 | unsigned long long mounted_time; /* mount time */ |
| 247 | unsigned long long min_mtime; /* min. modification time */ |
| 248 | unsigned long long max_mtime; /* max. modification time */ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 249 | |
| 250 | unsigned int last_victim[MAX_GC_POLICY]; /* last victim segment # */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 251 | }; |
| 252 | |
| 253 | struct free_segmap_info { |
| 254 | unsigned int start_segno; /* start segment number logically */ |
| 255 | unsigned int free_segments; /* # of free segments */ |
| 256 | unsigned int free_sections; /* # of free sections */ |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 257 | spinlock_t segmap_lock; /* free segmap lock */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 258 | unsigned long *free_segmap; /* free segment bitmap */ |
| 259 | unsigned long *free_secmap; /* free section bitmap */ |
| 260 | }; |
| 261 | |
| 262 | /* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */ |
| 263 | enum dirty_type { |
| 264 | DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */ |
| 265 | DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */ |
| 266 | DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */ |
| 267 | DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */ |
| 268 | DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */ |
| 269 | DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */ |
| 270 | DIRTY, /* to count # of dirty segments */ |
| 271 | PRE, /* to count # of entirely obsolete segments */ |
| 272 | NR_DIRTY_TYPE |
| 273 | }; |
| 274 | |
| 275 | struct dirty_seglist_info { |
| 276 | const struct victim_selection *v_ops; /* victim selction operation */ |
| 277 | unsigned long *dirty_segmap[NR_DIRTY_TYPE]; |
| 278 | struct mutex seglist_lock; /* lock for segment bitmaps */ |
| 279 | int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */ |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 280 | unsigned long *victim_secmap; /* background GC victims */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 281 | }; |
| 282 | |
| 283 | /* victim selection function for cleaning and SSR */ |
| 284 | struct victim_selection { |
| 285 | int (*get_victim)(struct f2fs_sb_info *, unsigned int *, |
| 286 | int, int, char); |
| 287 | }; |
| 288 | |
| 289 | /* for active log information */ |
| 290 | struct curseg_info { |
| 291 | struct mutex curseg_mutex; /* lock for consistency */ |
| 292 | struct f2fs_summary_block *sum_blk; /* cached summary block */ |
Chao Yu | b7ad751 | 2016-02-19 18:08:46 +0800 | [diff] [blame] | 293 | struct rw_semaphore journal_rwsem; /* protect journal area */ |
| 294 | struct f2fs_journal *journal; /* cached journal info */ |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 295 | unsigned char alloc_type; /* current allocation type */ |
| 296 | unsigned int segno; /* current segment number */ |
| 297 | unsigned short next_blkoff; /* next block offset to write */ |
| 298 | unsigned int zone; /* current zone number */ |
| 299 | unsigned int next_segno; /* preallocated segment */ |
| 300 | }; |
| 301 | |
Chao Yu | 184a5cd | 2014-09-04 18:13:01 +0800 | [diff] [blame] | 302 | struct sit_entry_set { |
| 303 | struct list_head set_list; /* link with all sit sets */ |
| 304 | unsigned int start_segno; /* start segno of sits in set */ |
| 305 | unsigned int entry_cnt; /* the # of sit entries in set */ |
| 306 | }; |
| 307 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 308 | /* |
| 309 | * inline functions |
| 310 | */ |
| 311 | static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type) |
| 312 | { |
| 313 | return (struct curseg_info *)(SM_I(sbi)->curseg_array + type); |
| 314 | } |
| 315 | |
| 316 | static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi, |
| 317 | unsigned int segno) |
| 318 | { |
| 319 | struct sit_info *sit_i = SIT_I(sbi); |
| 320 | return &sit_i->sentries[segno]; |
| 321 | } |
| 322 | |
| 323 | static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi, |
| 324 | unsigned int segno) |
| 325 | { |
| 326 | struct sit_info *sit_i = SIT_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 327 | return &sit_i->sec_entries[GET_SEC_FROM_SEG(sbi, segno)]; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi, |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 331 | unsigned int segno, bool use_section) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 332 | { |
| 333 | /* |
| 334 | * In order to get # of valid blocks in a section instantly from many |
| 335 | * segments, f2fs manages two counting structures separately. |
| 336 | */ |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 337 | if (use_section && sbi->segs_per_sec > 1) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 338 | return get_sec_entry(sbi, segno)->valid_blocks; |
| 339 | else |
| 340 | return get_seg_entry(sbi, segno)->valid_blocks; |
| 341 | } |
| 342 | |
| 343 | static inline void seg_info_from_raw_sit(struct seg_entry *se, |
| 344 | struct f2fs_sit_entry *rs) |
| 345 | { |
| 346 | se->valid_blocks = GET_SIT_VBLOCKS(rs); |
| 347 | se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs); |
| 348 | memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); |
| 349 | memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 350 | #ifdef CONFIG_F2FS_CHECK_FS |
| 351 | memcpy(se->cur_valid_map_mir, rs->valid_map, SIT_VBLOCK_MAP_SIZE); |
| 352 | #endif |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 353 | se->type = GET_SIT_TYPE(rs); |
| 354 | se->mtime = le64_to_cpu(rs->mtime); |
| 355 | } |
| 356 | |
Jaegeuk Kim | 2f17e34 | 2017-11-16 16:59:14 +0800 | [diff] [blame] | 357 | static inline void __seg_info_to_raw_sit(struct seg_entry *se, |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 358 | struct f2fs_sit_entry *rs) |
| 359 | { |
| 360 | unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) | |
| 361 | se->valid_blocks; |
| 362 | rs->vblocks = cpu_to_le16(raw_vblocks); |
| 363 | memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE); |
Jaegeuk Kim | 2f17e34 | 2017-11-16 16:59:14 +0800 | [diff] [blame] | 364 | rs->mtime = cpu_to_le64(se->mtime); |
| 365 | } |
| 366 | |
| 367 | static inline void seg_info_to_sit_page(struct f2fs_sb_info *sbi, |
| 368 | struct page *page, unsigned int start) |
| 369 | { |
| 370 | struct f2fs_sit_block *raw_sit; |
| 371 | struct seg_entry *se; |
| 372 | struct f2fs_sit_entry *rs; |
| 373 | unsigned int end = min(start + SIT_ENTRY_PER_BLOCK, |
| 374 | (unsigned long)MAIN_SEGS(sbi)); |
| 375 | int i; |
| 376 | |
| 377 | raw_sit = (struct f2fs_sit_block *)page_address(page); |
| 378 | for (i = 0; i < end - start; i++) { |
| 379 | rs = &raw_sit->entries[i]; |
| 380 | se = get_seg_entry(sbi, start + i); |
| 381 | __seg_info_to_raw_sit(se, rs); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | static inline void seg_info_to_raw_sit(struct seg_entry *se, |
| 386 | struct f2fs_sit_entry *rs) |
| 387 | { |
| 388 | __seg_info_to_raw_sit(se, rs); |
| 389 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 390 | memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); |
| 391 | se->ckpt_valid_blocks = se->valid_blocks; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | static inline unsigned int find_next_inuse(struct free_segmap_info *free_i, |
| 395 | unsigned int max, unsigned int segno) |
| 396 | { |
| 397 | unsigned int ret; |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 398 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 399 | ret = find_next_bit(free_i->free_segmap, max, segno); |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 400 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno) |
| 405 | { |
| 406 | struct free_segmap_info *free_i = FREE_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 407 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
| 408 | unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 409 | unsigned int next; |
| 410 | |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 411 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 412 | clear_bit(segno, free_i->free_segmap); |
| 413 | free_i->free_segments++; |
| 414 | |
Wanpeng Li | 7fd9701 | 2015-03-06 15:00:55 +0800 | [diff] [blame] | 415 | next = find_next_bit(free_i->free_segmap, |
| 416 | start_segno + sbi->segs_per_sec, start_segno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 417 | if (next >= start_segno + sbi->segs_per_sec) { |
| 418 | clear_bit(secno, free_i->free_secmap); |
| 419 | free_i->free_sections++; |
| 420 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 421 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | static inline void __set_inuse(struct f2fs_sb_info *sbi, |
| 425 | unsigned int segno) |
| 426 | { |
| 427 | struct free_segmap_info *free_i = FREE_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 428 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
| 429 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 430 | set_bit(segno, free_i->free_segmap); |
| 431 | free_i->free_segments--; |
| 432 | if (!test_and_set_bit(secno, free_i->free_secmap)) |
| 433 | free_i->free_sections--; |
| 434 | } |
| 435 | |
| 436 | static inline void __set_test_and_free(struct f2fs_sb_info *sbi, |
| 437 | unsigned int segno) |
| 438 | { |
| 439 | struct free_segmap_info *free_i = FREE_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 440 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
| 441 | unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 442 | unsigned int next; |
| 443 | |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 444 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 445 | if (test_and_clear_bit(segno, free_i->free_segmap)) { |
| 446 | free_i->free_segments++; |
| 447 | |
Chao Yu | f1121ab | 2014-07-14 16:45:15 +0800 | [diff] [blame] | 448 | next = find_next_bit(free_i->free_segmap, |
| 449 | start_segno + sbi->segs_per_sec, start_segno); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 450 | if (next >= start_segno + sbi->segs_per_sec) { |
| 451 | if (test_and_clear_bit(secno, free_i->free_secmap)) |
| 452 | free_i->free_sections++; |
| 453 | } |
| 454 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 455 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi, |
| 459 | unsigned int segno) |
| 460 | { |
| 461 | struct free_segmap_info *free_i = FREE_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 462 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
| 463 | |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 464 | spin_lock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 465 | if (!test_and_set_bit(segno, free_i->free_segmap)) { |
| 466 | free_i->free_segments--; |
| 467 | if (!test_and_set_bit(secno, free_i->free_secmap)) |
| 468 | free_i->free_sections--; |
| 469 | } |
Chao Yu | 1a118cc | 2015-02-11 18:20:38 +0800 | [diff] [blame] | 470 | spin_unlock(&free_i->segmap_lock); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static inline void get_sit_bitmap(struct f2fs_sb_info *sbi, |
| 474 | void *dst_addr) |
| 475 | { |
| 476 | struct sit_info *sit_i = SIT_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 477 | |
| 478 | #ifdef CONFIG_F2FS_CHECK_FS |
| 479 | if (memcmp(sit_i->sit_bitmap, sit_i->sit_bitmap_mir, |
| 480 | sit_i->bitmap_size)) |
| 481 | f2fs_bug_on(sbi, 1); |
| 482 | #endif |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 483 | memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size); |
| 484 | } |
| 485 | |
| 486 | static inline block_t written_block_count(struct f2fs_sb_info *sbi) |
| 487 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 488 | return SIT_I(sbi)->written_valid_blocks; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | static inline unsigned int free_segments(struct f2fs_sb_info *sbi) |
| 492 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 493 | return FREE_I(sbi)->free_segments; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | static inline int reserved_segments(struct f2fs_sb_info *sbi) |
| 497 | { |
| 498 | return SM_I(sbi)->reserved_segments; |
| 499 | } |
| 500 | |
| 501 | static inline unsigned int free_sections(struct f2fs_sb_info *sbi) |
| 502 | { |
Jaegeuk Kim | 8b8343f | 2014-02-24 13:00:13 +0900 | [diff] [blame] | 503 | return FREE_I(sbi)->free_sections; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi) |
| 507 | { |
| 508 | return DIRTY_I(sbi)->nr_dirty[PRE]; |
| 509 | } |
| 510 | |
| 511 | static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi) |
| 512 | { |
| 513 | return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] + |
| 514 | DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] + |
| 515 | DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] + |
| 516 | DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] + |
| 517 | DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] + |
| 518 | DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE]; |
| 519 | } |
| 520 | |
| 521 | static inline int overprovision_segments(struct f2fs_sb_info *sbi) |
| 522 | { |
| 523 | return SM_I(sbi)->ovp_segments; |
| 524 | } |
| 525 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 526 | static inline int reserved_sections(struct f2fs_sb_info *sbi) |
| 527 | { |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 528 | return GET_SEC_FROM_SEG(sbi, (unsigned int)reserved_segments(sbi)); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 529 | } |
| 530 | |
Jaegeuk Kim | 8ae26d1 | 2017-09-23 17:02:18 +0800 | [diff] [blame] | 531 | static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi) |
| 532 | { |
| 533 | unsigned int node_blocks = get_pages(sbi, F2FS_DIRTY_NODES) + |
| 534 | get_pages(sbi, F2FS_DIRTY_DENTS); |
| 535 | unsigned int dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS); |
| 536 | unsigned int segno, left_blocks; |
| 537 | int i; |
| 538 | |
| 539 | /* check current node segment */ |
| 540 | for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) { |
| 541 | segno = CURSEG_I(sbi, i)->segno; |
| 542 | left_blocks = sbi->blocks_per_seg - |
| 543 | get_seg_entry(sbi, segno)->ckpt_valid_blocks; |
| 544 | |
| 545 | if (node_blocks > left_blocks) |
| 546 | return false; |
| 547 | } |
| 548 | |
| 549 | /* check current data segment */ |
| 550 | segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno; |
| 551 | left_blocks = sbi->blocks_per_seg - |
| 552 | get_seg_entry(sbi, segno)->ckpt_valid_blocks; |
| 553 | if (dent_blocks > left_blocks) |
| 554 | return false; |
| 555 | return true; |
| 556 | } |
| 557 | |
Jaegeuk Kim | 7f3037a | 2016-09-01 12:02:51 -0700 | [diff] [blame] | 558 | static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, |
| 559 | int freed, int needed) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 560 | { |
Namjae Jeon | 5ac206c | 2013-02-02 23:52:59 +0900 | [diff] [blame] | 561 | int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); |
| 562 | int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 563 | int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); |
Jaegeuk Kim | 0f18b46 | 2016-05-20 11:10:10 -0700 | [diff] [blame] | 564 | |
Chao Yu | caf0047 | 2015-01-28 17:48:42 +0800 | [diff] [blame] | 565 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
Jaegeuk Kim | 029cd28 | 2012-12-21 17:20:21 +0900 | [diff] [blame] | 566 | return false; |
| 567 | |
Jaegeuk Kim | 8ae26d1 | 2017-09-23 17:02:18 +0800 | [diff] [blame] | 568 | if (free_sections(sbi) + freed == reserved_sections(sbi) + needed && |
| 569 | has_curseg_enough_space(sbi)) |
| 570 | return false; |
Jaegeuk Kim | 7f3037a | 2016-09-01 12:02:51 -0700 | [diff] [blame] | 571 | return (free_sections(sbi) + freed) <= |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 572 | (node_secs + 2 * dent_secs + imeta_secs + |
| 573 | reserved_sections(sbi) + needed); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 574 | } |
| 575 | |
Jaegeuk Kim | 81eb8d6 | 2013-10-24 13:31:34 +0900 | [diff] [blame] | 576 | static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi) |
| 577 | { |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 578 | return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments; |
Jaegeuk Kim | 81eb8d6 | 2013-10-24 13:31:34 +0900 | [diff] [blame] | 579 | } |
| 580 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 581 | static inline int utilization(struct f2fs_sb_info *sbi) |
| 582 | { |
Chris Fries | 6c311ec | 2014-01-17 14:44:39 -0600 | [diff] [blame] | 583 | return div_u64((u64)valid_user_blocks(sbi) * 100, |
| 584 | sbi->user_block_count); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Sometimes f2fs may be better to drop out-of-place update policy. |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 589 | * And, users can control the policy through sysfs entries. |
| 590 | * There are five policies with triggering conditions as follows. |
| 591 | * F2FS_IPU_FORCE - all the time, |
| 592 | * F2FS_IPU_SSR - if SSR mode is activated, |
| 593 | * F2FS_IPU_UTIL - if FS utilization is over threashold, |
| 594 | * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over |
| 595 | * threashold, |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 596 | * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash |
| 597 | * storages. IPU will be triggered only if the # of dirty |
| 598 | * pages over min_fsync_blocks. |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 599 | * F2FS_IPUT_DISABLE - disable IPU. (=default option) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 600 | */ |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 601 | #define DEF_MIN_IPU_UTIL 70 |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 602 | #define DEF_MIN_FSYNC_BLOCKS 8 |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 603 | #define DEF_MIN_HOT_BLOCKS 16 |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 604 | |
Jaegeuk Kim | d919765 | 2018-01-05 10:44:52 -0800 | [diff] [blame] | 605 | #define SMALL_VOLUME_SEGMENTS (16 * 512) /* 16GB */ |
| 606 | |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 607 | enum { |
| 608 | F2FS_IPU_FORCE, |
| 609 | F2FS_IPU_SSR, |
| 610 | F2FS_IPU_UTIL, |
| 611 | F2FS_IPU_SSR_UTIL, |
Jaegeuk Kim | c1ce1b0 | 2014-09-10 16:53:02 -0700 | [diff] [blame] | 612 | F2FS_IPU_FSYNC, |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 613 | F2FS_IPU_ASYNC, |
Jaegeuk Kim | 216fbd6 | 2013-11-07 13:13:42 +0900 | [diff] [blame] | 614 | }; |
| 615 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 616 | static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, |
| 617 | int type) |
| 618 | { |
| 619 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 620 | return curseg->segno; |
| 621 | } |
| 622 | |
| 623 | static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi, |
| 624 | int type) |
| 625 | { |
| 626 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 627 | return curseg->alloc_type; |
| 628 | } |
| 629 | |
| 630 | static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type) |
| 631 | { |
| 632 | struct curseg_info *curseg = CURSEG_I(sbi, type); |
| 633 | return curseg->next_blkoff; |
| 634 | } |
| 635 | |
| 636 | static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno) |
| 637 | { |
Liu Xue | 7a04f64 | 2015-07-27 10:17:59 +0000 | [diff] [blame] | 638 | f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 639 | } |
| 640 | |
Jaegeuk Kim | d919765 | 2018-01-05 10:44:52 -0800 | [diff] [blame] | 641 | static inline void verify_block_addr(struct f2fs_io_info *fio, block_t blk_addr) |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 642 | { |
Jaegeuk Kim | d919765 | 2018-01-05 10:44:52 -0800 | [diff] [blame] | 643 | struct f2fs_sb_info *sbi = fio->sbi; |
| 644 | |
| 645 | if (PAGE_TYPE_OF_BIO(fio->type) == META && |
| 646 | (!is_read_io(fio->op) || fio->is_meta)) |
| 647 | BUG_ON(blk_addr < SEG0_BLKADDR(sbi) || |
| 648 | blk_addr >= MAIN_BLKADDR(sbi)); |
| 649 | else |
| 650 | BUG_ON(blk_addr < MAIN_BLKADDR(sbi) || |
| 651 | blk_addr >= MAX_BLKADDR(sbi)); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | /* |
arter97 | e1c4204 | 2014-08-06 23:22:50 +0900 | [diff] [blame] | 655 | * Summary block is always treated as an invalid block |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 656 | */ |
Jaegeuk Kim | 2f17e34 | 2017-11-16 16:59:14 +0800 | [diff] [blame] | 657 | static inline int check_block_count(struct f2fs_sb_info *sbi, |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 658 | int segno, struct f2fs_sit_entry *raw_sit) |
| 659 | { |
Jaegeuk Kim | 4c27839 | 2015-08-11 16:01:30 -0700 | [diff] [blame] | 660 | #ifdef CONFIG_F2FS_CHECK_FS |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 661 | 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] | 662 | int valid_blocks = 0; |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 663 | int cur_pos = 0, next_pos; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 664 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 665 | /* check bitmap with valid block count */ |
Chao Yu | 44c60bf | 2013-10-29 14:50:40 +0800 | [diff] [blame] | 666 | do { |
| 667 | if (is_valid) { |
| 668 | next_pos = find_next_zero_bit_le(&raw_sit->valid_map, |
| 669 | sbi->blocks_per_seg, |
| 670 | cur_pos); |
| 671 | valid_blocks += next_pos - cur_pos; |
| 672 | } else |
| 673 | next_pos = find_next_bit_le(&raw_sit->valid_map, |
| 674 | sbi->blocks_per_seg, |
| 675 | cur_pos); |
| 676 | cur_pos = next_pos; |
| 677 | is_valid = !is_valid; |
| 678 | } while (cur_pos < sbi->blocks_per_seg); |
Jaegeuk Kim | 2f17e34 | 2017-11-16 16:59:14 +0800 | [diff] [blame] | 679 | |
| 680 | if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) { |
| 681 | f2fs_msg(sbi->sb, KERN_ERR, |
| 682 | "Mismatch valid blocks %d vs. %d", |
| 683 | GET_SIT_VBLOCKS(raw_sit), valid_blocks); |
| 684 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
| 685 | return -EINVAL; |
| 686 | } |
Jaegeuk Kim | 5d56b67 | 2013-10-29 15:14:54 +0900 | [diff] [blame] | 687 | #endif |
Jaegeuk Kim | 4c27839 | 2015-08-11 16:01:30 -0700 | [diff] [blame] | 688 | /* check segment usage, and check boundary of a given segment number */ |
Jaegeuk Kim | 2f17e34 | 2017-11-16 16:59:14 +0800 | [diff] [blame] | 689 | if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg |
| 690 | || segno > TOTAL_SEGS(sbi) - 1)) { |
| 691 | f2fs_msg(sbi->sb, KERN_ERR, |
| 692 | "Wrong valid blocks %d or segno %u", |
| 693 | GET_SIT_VBLOCKS(raw_sit), segno); |
| 694 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
| 695 | return -EINVAL; |
| 696 | } |
| 697 | return 0; |
Liu Xue | 7a04f64 | 2015-07-27 10:17:59 +0000 | [diff] [blame] | 698 | } |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 699 | |
| 700 | static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, |
| 701 | unsigned int start) |
| 702 | { |
| 703 | struct sit_info *sit_i = SIT_I(sbi); |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 704 | unsigned int offset = SIT_BLOCK_OFFSET(start); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 705 | block_t blk_addr = sit_i->sit_base_addr + offset; |
| 706 | |
| 707 | check_seg_range(sbi, start); |
| 708 | |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 709 | #ifdef CONFIG_F2FS_CHECK_FS |
| 710 | if (f2fs_test_bit(offset, sit_i->sit_bitmap) != |
| 711 | f2fs_test_bit(offset, sit_i->sit_bitmap_mir)) |
| 712 | f2fs_bug_on(sbi, 1); |
| 713 | #endif |
| 714 | |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 715 | /* calculate sit block address */ |
| 716 | if (f2fs_test_bit(offset, sit_i->sit_bitmap)) |
| 717 | blk_addr += sit_i->sit_blocks; |
| 718 | |
| 719 | return blk_addr; |
| 720 | } |
| 721 | |
| 722 | static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi, |
| 723 | pgoff_t block_addr) |
| 724 | { |
| 725 | struct sit_info *sit_i = SIT_I(sbi); |
| 726 | block_addr -= sit_i->sit_base_addr; |
| 727 | if (block_addr < sit_i->sit_blocks) |
| 728 | block_addr += sit_i->sit_blocks; |
| 729 | else |
| 730 | block_addr -= sit_i->sit_blocks; |
| 731 | |
| 732 | return block_addr + sit_i->sit_base_addr; |
| 733 | } |
| 734 | |
| 735 | static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start) |
| 736 | { |
Chao Yu | d3a14af | 2014-09-04 18:11:47 +0800 | [diff] [blame] | 737 | unsigned int block_off = SIT_BLOCK_OFFSET(start); |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 738 | |
Gu Zheng | c6ac4c0 | 2014-10-20 17:45:50 +0800 | [diff] [blame] | 739 | f2fs_change_bit(block_off, sit_i->sit_bitmap); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 740 | #ifdef CONFIG_F2FS_CHECK_FS |
| 741 | f2fs_change_bit(block_off, sit_i->sit_bitmap_mir); |
| 742 | #endif |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 743 | } |
| 744 | |
| 745 | static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi) |
| 746 | { |
| 747 | struct sit_info *sit_i = SIT_I(sbi); |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 748 | time64_t now = ktime_get_real_seconds(); |
| 749 | |
| 750 | return sit_i->elapsed_time + now - sit_i->mounted_time; |
Jaegeuk Kim | 39a53e0 | 2012-11-28 13:37:31 +0900 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | static inline void set_summary(struct f2fs_summary *sum, nid_t nid, |
| 754 | unsigned int ofs_in_node, unsigned char version) |
| 755 | { |
| 756 | sum->nid = cpu_to_le32(nid); |
| 757 | sum->ofs_in_node = cpu_to_le16(ofs_in_node); |
| 758 | sum->version = version; |
| 759 | } |
| 760 | |
| 761 | static inline block_t start_sum_block(struct f2fs_sb_info *sbi) |
| 762 | { |
| 763 | return __start_cp_addr(sbi) + |
| 764 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); |
| 765 | } |
| 766 | |
| 767 | static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) |
| 768 | { |
| 769 | return __start_cp_addr(sbi) + |
| 770 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count) |
| 771 | - (base + 1) + type; |
| 772 | } |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 773 | |
Hou Pengyang | 4992ba2 | 2017-02-16 12:34:31 +0000 | [diff] [blame] | 774 | static inline bool no_fggc_candidate(struct f2fs_sb_info *sbi, |
| 775 | unsigned int secno) |
| 776 | { |
Jaegeuk Kim | 8ae26d1 | 2017-09-23 17:02:18 +0800 | [diff] [blame] | 777 | if (get_valid_blocks(sbi, GET_SEG_FROM_SEC(sbi, secno), true) > |
Hou Pengyang | 4992ba2 | 2017-02-16 12:34:31 +0000 | [diff] [blame] | 778 | sbi->fggc_threshold) |
| 779 | return true; |
| 780 | return false; |
| 781 | } |
| 782 | |
Jaegeuk Kim | 5ec4e49 | 2013-03-31 13:26:03 +0900 | [diff] [blame] | 783 | static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno) |
| 784 | { |
| 785 | if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno)) |
| 786 | return true; |
| 787 | return false; |
| 788 | } |
Jaegeuk Kim | ac5d156 | 2013-04-29 16:58:39 +0900 | [diff] [blame] | 789 | |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 790 | /* |
| 791 | * It is very important to gather dirty pages and write at once, so that we can |
| 792 | * submit a big bio without interfering other data writes. |
| 793 | * By default, 512 pages for directory data, |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 794 | * 512 pages (2MB) * 8 for nodes, and |
| 795 | * 256 pages * 8 for meta are set. |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 796 | */ |
| 797 | static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type) |
| 798 | { |
Tejun Heo | a88a341 | 2015-05-22 17:13:28 -0400 | [diff] [blame] | 799 | if (sbi->sb->s_bdi->wb.dirty_exceeded) |
Jaegeuk Kim | 510184c | 2014-11-06 17:23:08 -0800 | [diff] [blame] | 800 | return 0; |
| 801 | |
Jaegeuk Kim | a125702 | 2015-10-08 10:40:07 -0700 | [diff] [blame] | 802 | if (type == DATA) |
| 803 | return sbi->blocks_per_seg; |
| 804 | else if (type == NODE) |
Jaegeuk Kim | 2c237eb | 2016-06-16 16:44:11 -0700 | [diff] [blame] | 805 | return 8 * sbi->blocks_per_seg; |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 806 | else if (type == META) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 807 | return 8 * BIO_MAX_PAGES; |
Jaegeuk Kim | 87d6f89 | 2014-03-18 12:40:49 +0900 | [diff] [blame] | 808 | else |
| 809 | return 0; |
| 810 | } |
Jaegeuk Kim | 50c8cdb | 2014-03-18 13:47:11 +0900 | [diff] [blame] | 811 | |
| 812 | /* |
| 813 | * When writing pages, it'd better align nr_to_write for segment size. |
| 814 | */ |
| 815 | static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type, |
| 816 | struct writeback_control *wbc) |
| 817 | { |
| 818 | long nr_to_write, desired; |
| 819 | |
| 820 | if (wbc->sync_mode != WB_SYNC_NONE) |
| 821 | return 0; |
| 822 | |
| 823 | nr_to_write = wbc->nr_to_write; |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 824 | desired = BIO_MAX_PAGES; |
Jaegeuk Kim | 28ea616 | 2016-05-25 17:17:56 -0700 | [diff] [blame] | 825 | if (type == NODE) |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 826 | desired <<= 1; |
Jaegeuk Kim | 50c8cdb | 2014-03-18 13:47:11 +0900 | [diff] [blame] | 827 | |
| 828 | wbc->nr_to_write = desired; |
| 829 | return desired - nr_to_write; |
| 830 | } |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 831 | |
| 832 | static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force) |
| 833 | { |
| 834 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; |
| 835 | bool wakeup = false; |
| 836 | int i; |
| 837 | |
| 838 | if (force) |
| 839 | goto wake_up; |
| 840 | |
| 841 | mutex_lock(&dcc->cmd_lock); |
Jaegeuk Kim | 8ae26d1 | 2017-09-23 17:02:18 +0800 | [diff] [blame] | 842 | for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { |
| 843 | if (i + 1 < dcc->discard_granularity) |
| 844 | break; |
Hyojun Kim | 63da420 | 2017-10-06 17:10:08 -0700 | [diff] [blame] | 845 | if (!list_empty(&dcc->pend_list[i])) { |
| 846 | wakeup = true; |
| 847 | break; |
| 848 | } |
| 849 | } |
| 850 | mutex_unlock(&dcc->cmd_lock); |
| 851 | if (!wakeup) |
| 852 | return; |
| 853 | wake_up: |
| 854 | dcc->discard_wake = 1; |
| 855 | wake_up_interruptible_all(&dcc->discard_wait_queue); |
| 856 | } |