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7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
39a53e0c JK |
3 | * fs/f2fs/segment.h |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
39a53e0c | 7 | */ |
ac5d156c | 8 | #include <linux/blkdev.h> |
66114cad | 9 | #include <linux/backing-dev.h> |
ac5d156c | 10 | |
39a53e0c JK |
11 | /* constant macro */ |
12 | #define NULL_SEGNO ((unsigned int)(~0)) | |
5ec4e49f | 13 | #define NULL_SECNO ((unsigned int)(~0)) |
39a53e0c | 14 | |
58c41035 | 15 | #define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */ |
44a83499 | 16 | #define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */ |
81eb8d6e | 17 | |
2040fce8 JK |
18 | #define F2FS_MIN_SEGMENTS 9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */ |
19 | ||
6224da87 | 20 | /* L: Logical segment # in volume, R: Relative segment # in main area */ |
68afcf2d TK |
21 | #define GET_L2R_SEGNO(free_i, segno) ((segno) - (free_i)->start_segno) |
22 | #define GET_R2L_SEGNO(free_i, segno) ((segno) + (free_i)->start_segno) | |
39a53e0c | 23 | |
68afcf2d TK |
24 | #define IS_DATASEG(t) ((t) <= CURSEG_COLD_DATA) |
25 | #define IS_NODESEG(t) ((t) >= CURSEG_HOT_NODE) | |
39a53e0c | 26 | |
a912b54d JK |
27 | #define IS_HOT(t) ((t) == CURSEG_HOT_NODE || (t) == CURSEG_HOT_DATA) |
28 | #define IS_WARM(t) ((t) == CURSEG_WARM_NODE || (t) == CURSEG_WARM_DATA) | |
29 | #define IS_COLD(t) ((t) == CURSEG_COLD_NODE || (t) == CURSEG_COLD_DATA) | |
30 | ||
5c773ba3 | 31 | #define IS_CURSEG(sbi, seg) \ |
68afcf2d TK |
32 | (((seg) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \ |
33 | ((seg) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \ | |
34 | ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \ | |
35 | ((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \ | |
36 | ((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \ | |
37 | ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno)) | |
39a53e0c JK |
38 | |
39 | #define IS_CURSEC(sbi, secno) \ | |
68afcf2d TK |
40 | (((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \ |
41 | (sbi)->segs_per_sec) || \ | |
42 | ((secno) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \ | |
43 | (sbi)->segs_per_sec) || \ | |
44 | ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \ | |
45 | (sbi)->segs_per_sec) || \ | |
46 | ((secno) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \ | |
47 | (sbi)->segs_per_sec) || \ | |
48 | ((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \ | |
49 | (sbi)->segs_per_sec) || \ | |
50 | ((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \ | |
51 | (sbi)->segs_per_sec)) \ | |
39a53e0c | 52 | |
0833721e YH |
53 | #define MAIN_BLKADDR(sbi) \ |
54 | (SM_I(sbi) ? SM_I(sbi)->main_blkaddr : \ | |
55 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->main_blkaddr)) | |
56 | #define SEG0_BLKADDR(sbi) \ | |
57 | (SM_I(sbi) ? SM_I(sbi)->seg0_blkaddr : \ | |
58 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment0_blkaddr)) | |
7cd8558b JK |
59 | |
60 | #define MAIN_SEGS(sbi) (SM_I(sbi)->main_segments) | |
68afcf2d | 61 | #define MAIN_SECS(sbi) ((sbi)->total_sections) |
7cd8558b | 62 | |
0833721e YH |
63 | #define TOTAL_SEGS(sbi) \ |
64 | (SM_I(sbi) ? SM_I(sbi)->segment_count : \ | |
65 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count)) | |
68afcf2d | 66 | #define TOTAL_BLKS(sbi) (TOTAL_SEGS(sbi) << (sbi)->log_blocks_per_seg) |
7cd8558b JK |
67 | |
68 | #define MAX_BLKADDR(sbi) (SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi)) | |
68afcf2d TK |
69 | #define SEGMENT_SIZE(sbi) (1ULL << ((sbi)->log_blocksize + \ |
70 | (sbi)->log_blocks_per_seg)) | |
7cd8558b JK |
71 | |
72 | #define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \ | |
68afcf2d | 73 | (GET_R2L_SEGNO(FREE_I(sbi), segno) << (sbi)->log_blocks_per_seg)) |
7cd8558b | 74 | |
39a53e0c | 75 | #define NEXT_FREE_BLKADDR(sbi, curseg) \ |
68afcf2d | 76 | (START_BLOCK(sbi, (curseg)->segno) + (curseg)->next_blkoff) |
39a53e0c | 77 | |
7cd8558b | 78 | #define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) ((blk_addr) - SEG0_BLKADDR(sbi)) |
39a53e0c | 79 | #define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \ |
68afcf2d | 80 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> (sbi)->log_blocks_per_seg) |
491c0854 | 81 | #define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \ |
68afcf2d | 82 | (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1)) |
491c0854 | 83 | |
39a53e0c | 84 | #define GET_SEGNO(sbi, blk_addr) \ |
93770ab7 | 85 | ((!__is_valid_data_blkaddr(blk_addr)) ? \ |
39a53e0c JK |
86 | NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \ |
87 | GET_SEGNO_FROM_SEG0(sbi, blk_addr))) | |
4ddb1a4d JK |
88 | #define BLKS_PER_SEC(sbi) \ |
89 | ((sbi)->segs_per_sec * (sbi)->blocks_per_seg) | |
90 | #define GET_SEC_FROM_SEG(sbi, segno) \ | |
68afcf2d | 91 | ((segno) / (sbi)->segs_per_sec) |
4ddb1a4d | 92 | #define GET_SEG_FROM_SEC(sbi, secno) \ |
63fcf8e8 | 93 | ((secno) * (sbi)->segs_per_sec) |
4ddb1a4d JK |
94 | #define GET_ZONE_FROM_SEC(sbi, secno) \ |
95 | ((secno) / (sbi)->secs_per_zone) | |
96 | #define GET_ZONE_FROM_SEG(sbi, segno) \ | |
97 | GET_ZONE_FROM_SEC(sbi, GET_SEC_FROM_SEG(sbi, segno)) | |
39a53e0c JK |
98 | |
99 | #define GET_SUM_BLOCK(sbi, segno) \ | |
68afcf2d | 100 | ((sbi)->sm_info->ssa_blkaddr + (segno)) |
39a53e0c JK |
101 | |
102 | #define GET_SUM_TYPE(footer) ((footer)->entry_type) | |
68afcf2d | 103 | #define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type)) |
39a53e0c JK |
104 | |
105 | #define SIT_ENTRY_OFFSET(sit_i, segno) \ | |
68afcf2d | 106 | ((segno) % (sit_i)->sents_per_block) |
d3a14afd | 107 | #define SIT_BLOCK_OFFSET(segno) \ |
68afcf2d | 108 | ((segno) / SIT_ENTRY_PER_BLOCK) |
d3a14afd CY |
109 | #define START_SEGNO(segno) \ |
110 | (SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK) | |
74de593a | 111 | #define SIT_BLK_CNT(sbi) \ |
f91108b8 | 112 | DIV_ROUND_UP(MAIN_SEGS(sbi), SIT_ENTRY_PER_BLOCK) |
39a53e0c JK |
113 | #define f2fs_bitmap_size(nr) \ |
114 | (BITS_TO_LONGS(nr) * sizeof(unsigned long)) | |
39a53e0c | 115 | |
55cf9cb6 CY |
116 | #define SECTOR_FROM_BLOCK(blk_addr) \ |
117 | (((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK) | |
118 | #define SECTOR_TO_BLOCK(sectors) \ | |
68afcf2d | 119 | ((sectors) >> F2FS_LOG_SECTORS_PER_BLOCK) |
3cd8a239 | 120 | |
39a53e0c JK |
121 | /* |
122 | * indicate a block allocation direction: RIGHT and LEFT. | |
123 | * RIGHT means allocating new sections towards the end of volume. | |
124 | * LEFT means the opposite direction. | |
125 | */ | |
126 | enum { | |
127 | ALLOC_RIGHT = 0, | |
128 | ALLOC_LEFT | |
129 | }; | |
130 | ||
131 | /* | |
132 | * In the victim_sel_policy->alloc_mode, there are two block allocation modes. | |
133 | * LFS writes data sequentially with cleaning operations. | |
134 | * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations. | |
135 | */ | |
136 | enum { | |
137 | LFS = 0, | |
138 | SSR | |
139 | }; | |
140 | ||
141 | /* | |
142 | * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes. | |
143 | * GC_CB is based on cost-benefit algorithm. | |
144 | * GC_GREEDY is based on greedy algorithm. | |
145 | */ | |
146 | enum { | |
147 | GC_CB = 0, | |
e066b83c JK |
148 | GC_GREEDY, |
149 | ALLOC_NEXT, | |
150 | FLUSH_DEVICE, | |
151 | MAX_GC_POLICY, | |
39a53e0c JK |
152 | }; |
153 | ||
154 | /* | |
155 | * BG_GC means the background cleaning job. | |
156 | * FG_GC means the on-demand cleaning job. | |
6aefd93b | 157 | * FORCE_FG_GC means on-demand cleaning job in background. |
39a53e0c JK |
158 | */ |
159 | enum { | |
160 | BG_GC = 0, | |
6aefd93b JK |
161 | FG_GC, |
162 | FORCE_FG_GC, | |
39a53e0c JK |
163 | }; |
164 | ||
165 | /* for a function parameter to select a victim segment */ | |
166 | struct victim_sel_policy { | |
167 | int alloc_mode; /* LFS or SSR */ | |
168 | int gc_mode; /* GC_CB or GC_GREEDY */ | |
169 | unsigned long *dirty_segmap; /* dirty segment bitmap */ | |
a26b7c8a | 170 | unsigned int max_search; /* maximum # of segments to search */ |
39a53e0c JK |
171 | unsigned int offset; /* last scanned bitmap offset */ |
172 | unsigned int ofs_unit; /* bitmap search unit */ | |
173 | unsigned int min_cost; /* minimum cost */ | |
174 | unsigned int min_segno; /* segment # having min. cost */ | |
175 | }; | |
176 | ||
177 | struct seg_entry { | |
f51b4ce6 CY |
178 | unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */ |
179 | unsigned int valid_blocks:10; /* # of valid blocks */ | |
180 | unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */ | |
181 | unsigned int padding:6; /* padding */ | |
39a53e0c | 182 | unsigned char *cur_valid_map; /* validity bitmap of blocks */ |
355e7891 CY |
183 | #ifdef CONFIG_F2FS_CHECK_FS |
184 | unsigned char *cur_valid_map_mir; /* mirror of current valid bitmap */ | |
185 | #endif | |
39a53e0c JK |
186 | /* |
187 | * # of valid blocks and the validity bitmap stored in the the last | |
188 | * checkpoint pack. This information is used by the SSR mode. | |
189 | */ | |
f51b4ce6 | 190 | unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */ |
a66cdd98 | 191 | unsigned char *discard_map; |
39a53e0c JK |
192 | unsigned long long mtime; /* modification time of the segment */ |
193 | }; | |
194 | ||
195 | struct sec_entry { | |
196 | unsigned int valid_blocks; /* # of valid blocks in a section */ | |
197 | }; | |
198 | ||
199 | struct segment_allocation { | |
200 | void (*allocate_segment)(struct f2fs_sb_info *, int, bool); | |
201 | }; | |
202 | ||
6f8d4455 | 203 | #define MAX_SKIP_GC_COUNT 16 |
2ef79ecb | 204 | |
88b88a66 JK |
205 | struct inmem_pages { |
206 | struct list_head list; | |
207 | struct page *page; | |
28bc106b | 208 | block_t old_addr; /* for revoking when fail to commit */ |
88b88a66 JK |
209 | }; |
210 | ||
39a53e0c JK |
211 | struct sit_info { |
212 | const struct segment_allocation *s_ops; | |
213 | ||
214 | block_t sit_base_addr; /* start block address of SIT area */ | |
215 | block_t sit_blocks; /* # of blocks used by SIT area */ | |
216 | block_t written_valid_blocks; /* # of valid blocks in main area */ | |
2fde3dd1 | 217 | char *bitmap; /* all bitmaps pointer */ |
39a53e0c | 218 | char *sit_bitmap; /* SIT bitmap pointer */ |
ae27d62e CY |
219 | #ifdef CONFIG_F2FS_CHECK_FS |
220 | char *sit_bitmap_mir; /* SIT bitmap mirror */ | |
bbf9f7d9 ST |
221 | |
222 | /* bitmap of segments to be ignored by GC in case of errors */ | |
223 | unsigned long *invalid_segmap; | |
ae27d62e | 224 | #endif |
39a53e0c JK |
225 | unsigned int bitmap_size; /* SIT bitmap size */ |
226 | ||
60a3b782 | 227 | unsigned long *tmp_map; /* bitmap for temporal use */ |
39a53e0c JK |
228 | unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */ |
229 | unsigned int dirty_sentries; /* # of dirty sentries */ | |
230 | unsigned int sents_per_block; /* # of SIT entries per block */ | |
3d26fa6b | 231 | struct rw_semaphore sentry_lock; /* to protect SIT cache */ |
39a53e0c JK |
232 | struct seg_entry *sentries; /* SIT segment-level cache */ |
233 | struct sec_entry *sec_entries; /* SIT section-level cache */ | |
234 | ||
235 | /* for cost-benefit algorithm in cleaning procedure */ | |
236 | unsigned long long elapsed_time; /* elapsed time after mount */ | |
237 | unsigned long long mounted_time; /* mount time */ | |
238 | unsigned long long min_mtime; /* min. modification time */ | |
239 | unsigned long long max_mtime; /* max. modification time */ | |
e066b83c JK |
240 | |
241 | unsigned int last_victim[MAX_GC_POLICY]; /* last victim segment # */ | |
39a53e0c JK |
242 | }; |
243 | ||
244 | struct free_segmap_info { | |
245 | unsigned int start_segno; /* start segment number logically */ | |
246 | unsigned int free_segments; /* # of free segments */ | |
247 | unsigned int free_sections; /* # of free sections */ | |
1a118ccf | 248 | spinlock_t segmap_lock; /* free segmap lock */ |
39a53e0c JK |
249 | unsigned long *free_segmap; /* free segment bitmap */ |
250 | unsigned long *free_secmap; /* free section bitmap */ | |
251 | }; | |
252 | ||
253 | /* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */ | |
254 | enum dirty_type { | |
255 | DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */ | |
256 | DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */ | |
257 | DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */ | |
258 | DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */ | |
259 | DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */ | |
260 | DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */ | |
261 | DIRTY, /* to count # of dirty segments */ | |
262 | PRE, /* to count # of entirely obsolete segments */ | |
263 | NR_DIRTY_TYPE | |
264 | }; | |
265 | ||
266 | struct dirty_seglist_info { | |
267 | const struct victim_selection *v_ops; /* victim selction operation */ | |
268 | unsigned long *dirty_segmap[NR_DIRTY_TYPE]; | |
269 | struct mutex seglist_lock; /* lock for segment bitmaps */ | |
270 | int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */ | |
5ec4e49f | 271 | unsigned long *victim_secmap; /* background GC victims */ |
39a53e0c JK |
272 | }; |
273 | ||
274 | /* victim selection function for cleaning and SSR */ | |
275 | struct victim_selection { | |
276 | int (*get_victim)(struct f2fs_sb_info *, unsigned int *, | |
277 | int, int, char); | |
278 | }; | |
279 | ||
280 | /* for active log information */ | |
281 | struct curseg_info { | |
282 | struct mutex curseg_mutex; /* lock for consistency */ | |
283 | struct f2fs_summary_block *sum_blk; /* cached summary block */ | |
b7ad7512 CY |
284 | struct rw_semaphore journal_rwsem; /* protect journal area */ |
285 | struct f2fs_journal *journal; /* cached journal info */ | |
39a53e0c JK |
286 | unsigned char alloc_type; /* current allocation type */ |
287 | unsigned int segno; /* current segment number */ | |
288 | unsigned short next_blkoff; /* next block offset to write */ | |
289 | unsigned int zone; /* current zone number */ | |
290 | unsigned int next_segno; /* preallocated segment */ | |
291 | }; | |
292 | ||
184a5cd2 CY |
293 | struct sit_entry_set { |
294 | struct list_head set_list; /* link with all sit sets */ | |
295 | unsigned int start_segno; /* start segno of sits in set */ | |
296 | unsigned int entry_cnt; /* the # of sit entries in set */ | |
297 | }; | |
298 | ||
39a53e0c JK |
299 | /* |
300 | * inline functions | |
301 | */ | |
302 | static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type) | |
303 | { | |
f5a53edc JK |
304 | if (type == CURSEG_COLD_DATA_PINNED) |
305 | type = CURSEG_COLD_DATA; | |
39a53e0c JK |
306 | return (struct curseg_info *)(SM_I(sbi)->curseg_array + type); |
307 | } | |
308 | ||
309 | static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi, | |
310 | unsigned int segno) | |
311 | { | |
312 | struct sit_info *sit_i = SIT_I(sbi); | |
313 | return &sit_i->sentries[segno]; | |
314 | } | |
315 | ||
316 | static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi, | |
317 | unsigned int segno) | |
318 | { | |
319 | struct sit_info *sit_i = SIT_I(sbi); | |
4ddb1a4d | 320 | return &sit_i->sec_entries[GET_SEC_FROM_SEG(sbi, segno)]; |
39a53e0c JK |
321 | } |
322 | ||
323 | static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi, | |
302bd348 | 324 | unsigned int segno, bool use_section) |
39a53e0c JK |
325 | { |
326 | /* | |
327 | * In order to get # of valid blocks in a section instantly from many | |
328 | * segments, f2fs manages two counting structures separately. | |
329 | */ | |
2c70c5e3 | 330 | if (use_section && __is_large_section(sbi)) |
39a53e0c JK |
331 | return get_sec_entry(sbi, segno)->valid_blocks; |
332 | else | |
333 | return get_seg_entry(sbi, segno)->valid_blocks; | |
334 | } | |
335 | ||
4354994f DR |
336 | static inline unsigned int get_ckpt_valid_blocks(struct f2fs_sb_info *sbi, |
337 | unsigned int segno) | |
338 | { | |
339 | return get_seg_entry(sbi, segno)->ckpt_valid_blocks; | |
340 | } | |
341 | ||
39a53e0c JK |
342 | static inline void seg_info_from_raw_sit(struct seg_entry *se, |
343 | struct f2fs_sit_entry *rs) | |
344 | { | |
345 | se->valid_blocks = GET_SIT_VBLOCKS(rs); | |
346 | se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs); | |
347 | memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); | |
348 | memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); | |
355e7891 CY |
349 | #ifdef CONFIG_F2FS_CHECK_FS |
350 | memcpy(se->cur_valid_map_mir, rs->valid_map, SIT_VBLOCK_MAP_SIZE); | |
351 | #endif | |
39a53e0c JK |
352 | se->type = GET_SIT_TYPE(rs); |
353 | se->mtime = le64_to_cpu(rs->mtime); | |
354 | } | |
355 | ||
068c3cd8 | 356 | static inline void __seg_info_to_raw_sit(struct seg_entry *se, |
39a53e0c JK |
357 | struct f2fs_sit_entry *rs) |
358 | { | |
359 | unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) | | |
360 | se->valid_blocks; | |
361 | rs->vblocks = cpu_to_le16(raw_vblocks); | |
362 | memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE); | |
068c3cd8 YH |
363 | rs->mtime = cpu_to_le64(se->mtime); |
364 | } | |
365 | ||
366 | static inline void seg_info_to_sit_page(struct f2fs_sb_info *sbi, | |
367 | struct page *page, unsigned int start) | |
368 | { | |
369 | struct f2fs_sit_block *raw_sit; | |
370 | struct seg_entry *se; | |
371 | struct f2fs_sit_entry *rs; | |
372 | unsigned int end = min(start + SIT_ENTRY_PER_BLOCK, | |
373 | (unsigned long)MAIN_SEGS(sbi)); | |
374 | int i; | |
375 | ||
376 | raw_sit = (struct f2fs_sit_block *)page_address(page); | |
81114baa | 377 | memset(raw_sit, 0, PAGE_SIZE); |
068c3cd8 YH |
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 | ||
39a53e0c JK |
390 | memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); |
391 | se->ckpt_valid_blocks = se->valid_blocks; | |
39a53e0c JK |
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; | |
1a118ccf | 398 | spin_lock(&free_i->segmap_lock); |
39a53e0c | 399 | ret = find_next_bit(free_i->free_segmap, max, segno); |
1a118ccf | 400 | spin_unlock(&free_i->segmap_lock); |
39a53e0c JK |
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); | |
4ddb1a4d JK |
407 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
408 | unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); | |
39a53e0c JK |
409 | unsigned int next; |
410 | ||
1a118ccf | 411 | spin_lock(&free_i->segmap_lock); |
39a53e0c JK |
412 | clear_bit(segno, free_i->free_segmap); |
413 | free_i->free_segments++; | |
414 | ||
7fd97019 WL |
415 | next = find_next_bit(free_i->free_segmap, |
416 | start_segno + sbi->segs_per_sec, start_segno); | |
39a53e0c JK |
417 | if (next >= start_segno + sbi->segs_per_sec) { |
418 | clear_bit(secno, free_i->free_secmap); | |
419 | free_i->free_sections++; | |
420 | } | |
1a118ccf | 421 | spin_unlock(&free_i->segmap_lock); |
39a53e0c JK |
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); | |
4ddb1a4d JK |
428 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
429 | ||
39a53e0c JK |
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); | |
4ddb1a4d JK |
440 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
441 | unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); | |
39a53e0c JK |
442 | unsigned int next; |
443 | ||
1a118ccf | 444 | spin_lock(&free_i->segmap_lock); |
39a53e0c JK |
445 | if (test_and_clear_bit(segno, free_i->free_segmap)) { |
446 | free_i->free_segments++; | |
447 | ||
3611ce99 YS |
448 | if (IS_CURSEC(sbi, secno)) |
449 | goto skip_free; | |
f1121ab0 CY |
450 | next = find_next_bit(free_i->free_segmap, |
451 | start_segno + sbi->segs_per_sec, start_segno); | |
39a53e0c JK |
452 | if (next >= start_segno + sbi->segs_per_sec) { |
453 | if (test_and_clear_bit(secno, free_i->free_secmap)) | |
454 | free_i->free_sections++; | |
455 | } | |
456 | } | |
3611ce99 | 457 | skip_free: |
1a118ccf | 458 | spin_unlock(&free_i->segmap_lock); |
39a53e0c JK |
459 | } |
460 | ||
461 | static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi, | |
462 | unsigned int segno) | |
463 | { | |
464 | struct free_segmap_info *free_i = FREE_I(sbi); | |
4ddb1a4d JK |
465 | unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); |
466 | ||
1a118ccf | 467 | spin_lock(&free_i->segmap_lock); |
39a53e0c JK |
468 | if (!test_and_set_bit(segno, free_i->free_segmap)) { |
469 | free_i->free_segments--; | |
470 | if (!test_and_set_bit(secno, free_i->free_secmap)) | |
471 | free_i->free_sections--; | |
472 | } | |
1a118ccf | 473 | spin_unlock(&free_i->segmap_lock); |
39a53e0c JK |
474 | } |
475 | ||
476 | static inline void get_sit_bitmap(struct f2fs_sb_info *sbi, | |
477 | void *dst_addr) | |
478 | { | |
479 | struct sit_info *sit_i = SIT_I(sbi); | |
ae27d62e CY |
480 | |
481 | #ifdef CONFIG_F2FS_CHECK_FS | |
482 | if (memcmp(sit_i->sit_bitmap, sit_i->sit_bitmap_mir, | |
483 | sit_i->bitmap_size)) | |
484 | f2fs_bug_on(sbi, 1); | |
485 | #endif | |
39a53e0c JK |
486 | memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size); |
487 | } | |
488 | ||
489 | static inline block_t written_block_count(struct f2fs_sb_info *sbi) | |
490 | { | |
8b8343fa | 491 | return SIT_I(sbi)->written_valid_blocks; |
39a53e0c JK |
492 | } |
493 | ||
494 | static inline unsigned int free_segments(struct f2fs_sb_info *sbi) | |
495 | { | |
8b8343fa | 496 | return FREE_I(sbi)->free_segments; |
39a53e0c JK |
497 | } |
498 | ||
499 | static inline int reserved_segments(struct f2fs_sb_info *sbi) | |
500 | { | |
501 | return SM_I(sbi)->reserved_segments; | |
502 | } | |
503 | ||
504 | static inline unsigned int free_sections(struct f2fs_sb_info *sbi) | |
505 | { | |
8b8343fa | 506 | return FREE_I(sbi)->free_sections; |
39a53e0c JK |
507 | } |
508 | ||
509 | static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi) | |
510 | { | |
511 | return DIRTY_I(sbi)->nr_dirty[PRE]; | |
512 | } | |
513 | ||
514 | static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi) | |
515 | { | |
516 | return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] + | |
517 | DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] + | |
518 | DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] + | |
519 | DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] + | |
520 | DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] + | |
521 | DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE]; | |
522 | } | |
523 | ||
524 | static inline int overprovision_segments(struct f2fs_sb_info *sbi) | |
525 | { | |
526 | return SM_I(sbi)->ovp_segments; | |
527 | } | |
528 | ||
39a53e0c JK |
529 | static inline int reserved_sections(struct f2fs_sb_info *sbi) |
530 | { | |
4ddb1a4d | 531 | return GET_SEC_FROM_SEG(sbi, (unsigned int)reserved_segments(sbi)); |
39a53e0c JK |
532 | } |
533 | ||
bf34c93d CY |
534 | static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi) |
535 | { | |
536 | unsigned int node_blocks = get_pages(sbi, F2FS_DIRTY_NODES) + | |
537 | get_pages(sbi, F2FS_DIRTY_DENTS); | |
538 | unsigned int dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS); | |
539 | unsigned int segno, left_blocks; | |
540 | int i; | |
541 | ||
542 | /* check current node segment */ | |
543 | for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) { | |
544 | segno = CURSEG_I(sbi, i)->segno; | |
545 | left_blocks = sbi->blocks_per_seg - | |
546 | get_seg_entry(sbi, segno)->ckpt_valid_blocks; | |
547 | ||
548 | if (node_blocks > left_blocks) | |
549 | return false; | |
550 | } | |
551 | ||
552 | /* check current data segment */ | |
553 | segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno; | |
554 | left_blocks = sbi->blocks_per_seg - | |
555 | get_seg_entry(sbi, segno)->ckpt_valid_blocks; | |
556 | if (dent_blocks > left_blocks) | |
557 | return false; | |
558 | return true; | |
559 | } | |
560 | ||
7f3037a5 JK |
561 | static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, |
562 | int freed, int needed) | |
39a53e0c | 563 | { |
5ac206cf NJ |
564 | int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); |
565 | int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); | |
b9610bdf | 566 | int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA); |
0f18b462 | 567 | |
caf0047e | 568 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
029cd28c JK |
569 | return false; |
570 | ||
bf34c93d CY |
571 | if (free_sections(sbi) + freed == reserved_sections(sbi) + needed && |
572 | has_curseg_enough_space(sbi)) | |
573 | return false; | |
7f3037a5 | 574 | return (free_sections(sbi) + freed) <= |
b9610bdf JK |
575 | (node_secs + 2 * dent_secs + imeta_secs + |
576 | reserved_sections(sbi) + needed); | |
39a53e0c JK |
577 | } |
578 | ||
00e09c0b | 579 | static inline bool f2fs_is_checkpoint_ready(struct f2fs_sb_info *sbi) |
4354994f DR |
580 | { |
581 | if (likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED))) | |
00e09c0b | 582 | return true; |
4354994f | 583 | if (likely(!has_not_enough_free_secs(sbi, 0, 0))) |
00e09c0b CY |
584 | return true; |
585 | return false; | |
4354994f DR |
586 | } |
587 | ||
81eb8d6e JK |
588 | static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi) |
589 | { | |
6c311ec6 | 590 | return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments; |
81eb8d6e JK |
591 | } |
592 | ||
39a53e0c JK |
593 | static inline int utilization(struct f2fs_sb_info *sbi) |
594 | { | |
6c311ec6 CF |
595 | return div_u64((u64)valid_user_blocks(sbi) * 100, |
596 | sbi->user_block_count); | |
39a53e0c JK |
597 | } |
598 | ||
599 | /* | |
600 | * Sometimes f2fs may be better to drop out-of-place update policy. | |
216fbd64 JK |
601 | * And, users can control the policy through sysfs entries. |
602 | * There are five policies with triggering conditions as follows. | |
603 | * F2FS_IPU_FORCE - all the time, | |
604 | * F2FS_IPU_SSR - if SSR mode is activated, | |
605 | * F2FS_IPU_UTIL - if FS utilization is over threashold, | |
606 | * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over | |
607 | * threashold, | |
c1ce1b02 JK |
608 | * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash |
609 | * storages. IPU will be triggered only if the # of dirty | |
d7b0a23d JK |
610 | * pages over min_fsync_blocks. (=default option) |
611 | * F2FS_IPU_ASYNC - do IPU given by asynchronous write requests. | |
0e7f4197 | 612 | * F2FS_IPU_NOCACHE - disable IPU bio cache. |
d7b0a23d | 613 | * F2FS_IPUT_DISABLE - disable IPU. (=default option in LFS mode) |
39a53e0c | 614 | */ |
216fbd64 | 615 | #define DEF_MIN_IPU_UTIL 70 |
c1ce1b02 | 616 | #define DEF_MIN_FSYNC_BLOCKS 8 |
ef095d19 | 617 | #define DEF_MIN_HOT_BLOCKS 16 |
216fbd64 | 618 | |
84b89e5d JK |
619 | #define SMALL_VOLUME_SEGMENTS (16 * 512) /* 16GB */ |
620 | ||
216fbd64 JK |
621 | enum { |
622 | F2FS_IPU_FORCE, | |
623 | F2FS_IPU_SSR, | |
624 | F2FS_IPU_UTIL, | |
625 | F2FS_IPU_SSR_UTIL, | |
c1ce1b02 | 626 | F2FS_IPU_FSYNC, |
04485987 | 627 | F2FS_IPU_ASYNC, |
0e7f4197 | 628 | F2FS_IPU_NOCACHE, |
216fbd64 JK |
629 | }; |
630 | ||
39a53e0c JK |
631 | static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, |
632 | int type) | |
633 | { | |
634 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
635 | return curseg->segno; | |
636 | } | |
637 | ||
638 | static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi, | |
639 | int type) | |
640 | { | |
641 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
642 | return curseg->alloc_type; | |
643 | } | |
644 | ||
645 | static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type) | |
646 | { | |
647 | struct curseg_info *curseg = CURSEG_I(sbi, type); | |
648 | return curseg->next_blkoff; | |
649 | } | |
650 | ||
651 | static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno) | |
652 | { | |
7a04f64d | 653 | f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1); |
39a53e0c JK |
654 | } |
655 | ||
93770ab7 | 656 | static inline void verify_fio_blkaddr(struct f2fs_io_info *fio) |
39a53e0c | 657 | { |
0833721e YH |
658 | struct f2fs_sb_info *sbi = fio->sbi; |
659 | ||
93770ab7 CY |
660 | if (__is_valid_data_blkaddr(fio->old_blkaddr)) |
661 | verify_blkaddr(sbi, fio->old_blkaddr, __is_meta_io(fio) ? | |
662 | META_GENERIC : DATA_GENERIC); | |
663 | verify_blkaddr(sbi, fio->new_blkaddr, __is_meta_io(fio) ? | |
664 | META_GENERIC : DATA_GENERIC_ENHANCE); | |
39a53e0c JK |
665 | } |
666 | ||
667 | /* | |
e1c42045 | 668 | * Summary block is always treated as an invalid block |
39a53e0c | 669 | */ |
c39a1b34 | 670 | static inline int check_block_count(struct f2fs_sb_info *sbi, |
39a53e0c JK |
671 | int segno, struct f2fs_sit_entry *raw_sit) |
672 | { | |
44c60bf2 | 673 | bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false; |
39a53e0c | 674 | int valid_blocks = 0; |
44c60bf2 | 675 | int cur_pos = 0, next_pos; |
39a53e0c | 676 | |
39a53e0c | 677 | /* check bitmap with valid block count */ |
44c60bf2 CY |
678 | do { |
679 | if (is_valid) { | |
680 | next_pos = find_next_zero_bit_le(&raw_sit->valid_map, | |
681 | sbi->blocks_per_seg, | |
682 | cur_pos); | |
683 | valid_blocks += next_pos - cur_pos; | |
684 | } else | |
685 | next_pos = find_next_bit_le(&raw_sit->valid_map, | |
686 | sbi->blocks_per_seg, | |
687 | cur_pos); | |
688 | cur_pos = next_pos; | |
689 | is_valid = !is_valid; | |
690 | } while (cur_pos < sbi->blocks_per_seg); | |
c39a1b34 JK |
691 | |
692 | if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) { | |
dcbb4c10 JP |
693 | f2fs_err(sbi, "Mismatch valid blocks %d vs. %d", |
694 | GET_SIT_VBLOCKS(raw_sit), valid_blocks); | |
c39a1b34 | 695 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
10f966bb | 696 | return -EFSCORRUPTED; |
c39a1b34 | 697 | } |
e95bcdb2 | 698 | |
4c278394 | 699 | /* check segment usage, and check boundary of a given segment number */ |
c39a1b34 JK |
700 | if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg |
701 | || segno > TOTAL_SEGS(sbi) - 1)) { | |
dcbb4c10 JP |
702 | f2fs_err(sbi, "Wrong valid blocks %d or segno %u", |
703 | GET_SIT_VBLOCKS(raw_sit), segno); | |
c39a1b34 | 704 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
10f966bb | 705 | return -EFSCORRUPTED; |
c39a1b34 JK |
706 | } |
707 | return 0; | |
7a04f64d | 708 | } |
39a53e0c JK |
709 | |
710 | static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, | |
711 | unsigned int start) | |
712 | { | |
713 | struct sit_info *sit_i = SIT_I(sbi); | |
d3a14afd | 714 | unsigned int offset = SIT_BLOCK_OFFSET(start); |
39a53e0c JK |
715 | block_t blk_addr = sit_i->sit_base_addr + offset; |
716 | ||
717 | check_seg_range(sbi, start); | |
718 | ||
ae27d62e CY |
719 | #ifdef CONFIG_F2FS_CHECK_FS |
720 | if (f2fs_test_bit(offset, sit_i->sit_bitmap) != | |
721 | f2fs_test_bit(offset, sit_i->sit_bitmap_mir)) | |
722 | f2fs_bug_on(sbi, 1); | |
723 | #endif | |
724 | ||
39a53e0c JK |
725 | /* calculate sit block address */ |
726 | if (f2fs_test_bit(offset, sit_i->sit_bitmap)) | |
727 | blk_addr += sit_i->sit_blocks; | |
728 | ||
729 | return blk_addr; | |
730 | } | |
731 | ||
732 | static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi, | |
733 | pgoff_t block_addr) | |
734 | { | |
735 | struct sit_info *sit_i = SIT_I(sbi); | |
736 | block_addr -= sit_i->sit_base_addr; | |
737 | if (block_addr < sit_i->sit_blocks) | |
738 | block_addr += sit_i->sit_blocks; | |
739 | else | |
740 | block_addr -= sit_i->sit_blocks; | |
741 | ||
742 | return block_addr + sit_i->sit_base_addr; | |
743 | } | |
744 | ||
745 | static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start) | |
746 | { | |
d3a14afd | 747 | unsigned int block_off = SIT_BLOCK_OFFSET(start); |
39a53e0c | 748 | |
c6ac4c0e | 749 | f2fs_change_bit(block_off, sit_i->sit_bitmap); |
ae27d62e CY |
750 | #ifdef CONFIG_F2FS_CHECK_FS |
751 | f2fs_change_bit(block_off, sit_i->sit_bitmap_mir); | |
752 | #endif | |
39a53e0c JK |
753 | } |
754 | ||
a1f72ac2 CY |
755 | static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi, |
756 | bool base_time) | |
39a53e0c JK |
757 | { |
758 | struct sit_info *sit_i = SIT_I(sbi); | |
a1f72ac2 | 759 | time64_t diff, now = ktime_get_real_seconds(); |
48fbfe50 | 760 | |
a1f72ac2 CY |
761 | if (now >= sit_i->mounted_time) |
762 | return sit_i->elapsed_time + now - sit_i->mounted_time; | |
763 | ||
764 | /* system time is set to the past */ | |
765 | if (!base_time) { | |
766 | diff = sit_i->mounted_time - now; | |
767 | if (sit_i->elapsed_time >= diff) | |
768 | return sit_i->elapsed_time - diff; | |
769 | return 0; | |
770 | } | |
771 | return sit_i->elapsed_time; | |
39a53e0c JK |
772 | } |
773 | ||
774 | static inline void set_summary(struct f2fs_summary *sum, nid_t nid, | |
775 | unsigned int ofs_in_node, unsigned char version) | |
776 | { | |
777 | sum->nid = cpu_to_le32(nid); | |
778 | sum->ofs_in_node = cpu_to_le16(ofs_in_node); | |
779 | sum->version = version; | |
780 | } | |
781 | ||
782 | static inline block_t start_sum_block(struct f2fs_sb_info *sbi) | |
783 | { | |
784 | return __start_cp_addr(sbi) + | |
785 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); | |
786 | } | |
787 | ||
788 | static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) | |
789 | { | |
790 | return __start_cp_addr(sbi) + | |
791 | le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count) | |
792 | - (base + 1) + type; | |
793 | } | |
5ec4e49f JK |
794 | |
795 | static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno) | |
796 | { | |
797 | if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno)) | |
798 | return true; | |
799 | return false; | |
800 | } | |
ac5d156c | 801 | |
87d6f890 JK |
802 | /* |
803 | * It is very important to gather dirty pages and write at once, so that we can | |
804 | * submit a big bio without interfering other data writes. | |
805 | * By default, 512 pages for directory data, | |
727ebb09 KM |
806 | * 512 pages (2MB) * 8 for nodes, and |
807 | * 256 pages * 8 for meta are set. | |
87d6f890 JK |
808 | */ |
809 | static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type) | |
810 | { | |
a88a341a | 811 | if (sbi->sb->s_bdi->wb.dirty_exceeded) |
510184c8 JK |
812 | return 0; |
813 | ||
a1257023 JK |
814 | if (type == DATA) |
815 | return sbi->blocks_per_seg; | |
816 | else if (type == NODE) | |
2c237eba | 817 | return 8 * sbi->blocks_per_seg; |
87d6f890 | 818 | else if (type == META) |
664ba972 | 819 | return 8 * BIO_MAX_PAGES; |
87d6f890 JK |
820 | else |
821 | return 0; | |
822 | } | |
50c8cdb3 JK |
823 | |
824 | /* | |
825 | * When writing pages, it'd better align nr_to_write for segment size. | |
826 | */ | |
827 | static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type, | |
828 | struct writeback_control *wbc) | |
829 | { | |
830 | long nr_to_write, desired; | |
831 | ||
832 | if (wbc->sync_mode != WB_SYNC_NONE) | |
833 | return 0; | |
834 | ||
835 | nr_to_write = wbc->nr_to_write; | |
664ba972 | 836 | desired = BIO_MAX_PAGES; |
28ea6162 | 837 | if (type == NODE) |
664ba972 | 838 | desired <<= 1; |
50c8cdb3 JK |
839 | |
840 | wbc->nr_to_write = desired; | |
841 | return desired - nr_to_write; | |
842 | } | |
01983c71 JK |
843 | |
844 | static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force) | |
845 | { | |
846 | struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; | |
847 | bool wakeup = false; | |
848 | int i; | |
849 | ||
850 | if (force) | |
851 | goto wake_up; | |
852 | ||
853 | mutex_lock(&dcc->cmd_lock); | |
78997b56 CY |
854 | for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { |
855 | if (i + 1 < dcc->discard_granularity) | |
856 | break; | |
01983c71 JK |
857 | if (!list_empty(&dcc->pend_list[i])) { |
858 | wakeup = true; | |
859 | break; | |
860 | } | |
861 | } | |
862 | mutex_unlock(&dcc->cmd_lock); | |
b460866d | 863 | if (!wakeup || !is_idle(sbi, DISCARD_TIME)) |
01983c71 JK |
864 | return; |
865 | wake_up: | |
866 | dcc->discard_wake = 1; | |
867 | wake_up_interruptible_all(&dcc->discard_wait_queue); | |
868 | } |