diff options
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 931 |
1 files changed, 931 insertions, 0 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h new file mode 100644 index 000000000..979296b83 --- /dev/null +++ b/fs/f2fs/segment.h @@ -0,0 +1,931 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * fs/f2fs/segment.h + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + */ +#include <linux/blkdev.h> +#include <linux/backing-dev.h> + +/* constant macro */ +#define NULL_SEGNO ((unsigned int)(~0)) +#define NULL_SECNO ((unsigned int)(~0)) + +#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */ +#define DEF_MAX_RECLAIM_PREFREE_SEGMENTS 4096 /* 8GB in maximum */ + +#define F2FS_MIN_SEGMENTS 9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */ +#define F2FS_MIN_META_SEGMENTS 8 /* SB + 2 (CP + SIT + NAT) + SSA */ + +/* L: Logical segment # in volume, R: Relative segment # in main area */ +#define GET_L2R_SEGNO(free_i, segno) ((segno) - (free_i)->start_segno) +#define GET_R2L_SEGNO(free_i, segno) ((segno) + (free_i)->start_segno) + +#define IS_DATASEG(t) ((t) <= CURSEG_COLD_DATA) +#define IS_NODESEG(t) ((t) >= CURSEG_HOT_NODE && (t) <= CURSEG_COLD_NODE) +#define SE_PAGETYPE(se) ((IS_NODESEG((se)->type) ? NODE : DATA)) + +static inline void sanity_check_seg_type(struct f2fs_sb_info *sbi, + unsigned short seg_type) +{ + f2fs_bug_on(sbi, seg_type >= NR_PERSISTENT_LOG); +} + +#define IS_HOT(t) ((t) == CURSEG_HOT_NODE || (t) == CURSEG_HOT_DATA) +#define IS_WARM(t) ((t) == CURSEG_WARM_NODE || (t) == CURSEG_WARM_DATA) +#define IS_COLD(t) ((t) == CURSEG_COLD_NODE || (t) == CURSEG_COLD_DATA) + +#define IS_CURSEG(sbi, seg) \ + (((seg) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno) || \ + ((seg) == CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC)->segno)) + +#define IS_CURSEC(sbi, secno) \ + (((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno / \ + (sbi)->segs_per_sec) || \ + ((secno) == CURSEG_I(sbi, CURSEG_ALL_DATA_ATGC)->segno / \ + (sbi)->segs_per_sec)) + +#define MAIN_BLKADDR(sbi) \ + (SM_I(sbi) ? SM_I(sbi)->main_blkaddr : \ + le32_to_cpu(F2FS_RAW_SUPER(sbi)->main_blkaddr)) +#define SEG0_BLKADDR(sbi) \ + (SM_I(sbi) ? SM_I(sbi)->seg0_blkaddr : \ + le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment0_blkaddr)) + +#define MAIN_SEGS(sbi) (SM_I(sbi)->main_segments) +#define MAIN_SECS(sbi) ((sbi)->total_sections) + +#define TOTAL_SEGS(sbi) \ + (SM_I(sbi) ? SM_I(sbi)->segment_count : \ + le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count)) +#define TOTAL_BLKS(sbi) (TOTAL_SEGS(sbi) << (sbi)->log_blocks_per_seg) + +#define MAX_BLKADDR(sbi) (SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi)) +#define SEGMENT_SIZE(sbi) (1ULL << ((sbi)->log_blocksize + \ + (sbi)->log_blocks_per_seg)) + +#define START_BLOCK(sbi, segno) (SEG0_BLKADDR(sbi) + \ + (GET_R2L_SEGNO(FREE_I(sbi), segno) << (sbi)->log_blocks_per_seg)) + +#define NEXT_FREE_BLKADDR(sbi, curseg) \ + (START_BLOCK(sbi, (curseg)->segno) + (curseg)->next_blkoff) + +#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) ((blk_addr) - SEG0_BLKADDR(sbi)) +#define GET_SEGNO_FROM_SEG0(sbi, blk_addr) \ + (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> (sbi)->log_blocks_per_seg) +#define GET_BLKOFF_FROM_SEG0(sbi, blk_addr) \ + (GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1)) + +#define GET_SEGNO(sbi, blk_addr) \ + ((!__is_valid_data_blkaddr(blk_addr)) ? \ + NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi), \ + GET_SEGNO_FROM_SEG0(sbi, blk_addr))) +#define BLKS_PER_SEC(sbi) \ + ((sbi)->segs_per_sec * (sbi)->blocks_per_seg) +#define CAP_BLKS_PER_SEC(sbi) \ + ((sbi)->segs_per_sec * (sbi)->blocks_per_seg - \ + (sbi)->unusable_blocks_per_sec) +#define CAP_SEGS_PER_SEC(sbi) \ + ((sbi)->segs_per_sec - ((sbi)->unusable_blocks_per_sec >>\ + (sbi)->log_blocks_per_seg)) +#define GET_SEC_FROM_SEG(sbi, segno) \ + (((segno) == -1) ? -1: (segno) / (sbi)->segs_per_sec) +#define GET_SEG_FROM_SEC(sbi, secno) \ + ((secno) * (sbi)->segs_per_sec) +#define GET_ZONE_FROM_SEC(sbi, secno) \ + (((secno) == -1) ? -1: (secno) / (sbi)->secs_per_zone) +#define GET_ZONE_FROM_SEG(sbi, segno) \ + GET_ZONE_FROM_SEC(sbi, GET_SEC_FROM_SEG(sbi, segno)) + +#define GET_SUM_BLOCK(sbi, segno) \ + ((sbi)->sm_info->ssa_blkaddr + (segno)) + +#define GET_SUM_TYPE(footer) ((footer)->entry_type) +#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type)) + +#define SIT_ENTRY_OFFSET(sit_i, segno) \ + ((segno) % (sit_i)->sents_per_block) +#define SIT_BLOCK_OFFSET(segno) \ + ((segno) / SIT_ENTRY_PER_BLOCK) +#define START_SEGNO(segno) \ + (SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK) +#define SIT_BLK_CNT(sbi) \ + DIV_ROUND_UP(MAIN_SEGS(sbi), SIT_ENTRY_PER_BLOCK) +#define f2fs_bitmap_size(nr) \ + (BITS_TO_LONGS(nr) * sizeof(unsigned long)) + +#define SECTOR_FROM_BLOCK(blk_addr) \ + (((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK) +#define SECTOR_TO_BLOCK(sectors) \ + ((sectors) >> F2FS_LOG_SECTORS_PER_BLOCK) + +/* + * indicate a block allocation direction: RIGHT and LEFT. + * RIGHT means allocating new sections towards the end of volume. + * LEFT means the opposite direction. + */ +enum { + ALLOC_RIGHT = 0, + ALLOC_LEFT +}; + +/* + * In the victim_sel_policy->alloc_mode, there are two block allocation modes. + * LFS writes data sequentially with cleaning operations. + * SSR (Slack Space Recycle) reuses obsolete space without cleaning operations. + * AT_SSR (Age Threshold based Slack Space Recycle) merges fragments into + * fragmented segment which has similar aging degree. + */ +enum { + LFS = 0, + SSR, + AT_SSR, +}; + +/* + * In the victim_sel_policy->gc_mode, there are two gc, aka cleaning, modes. + * GC_CB is based on cost-benefit algorithm. + * GC_GREEDY is based on greedy algorithm. + * GC_AT is based on age-threshold algorithm. + */ +enum { + GC_CB = 0, + GC_GREEDY, + GC_AT, + ALLOC_NEXT, + FLUSH_DEVICE, + MAX_GC_POLICY, +}; + +/* + * BG_GC means the background cleaning job. + * FG_GC means the on-demand cleaning job. + * FORCE_FG_GC means on-demand cleaning job in background. + */ +enum { + BG_GC = 0, + FG_GC, + FORCE_FG_GC, +}; + +/* for a function parameter to select a victim segment */ +struct victim_sel_policy { + int alloc_mode; /* LFS or SSR */ + int gc_mode; /* GC_CB or GC_GREEDY */ + unsigned long *dirty_bitmap; /* dirty segment/section bitmap */ + unsigned int max_search; /* + * maximum # of segments/sections + * to search + */ + unsigned int offset; /* last scanned bitmap offset */ + unsigned int ofs_unit; /* bitmap search unit */ + unsigned int min_cost; /* minimum cost */ + unsigned long long oldest_age; /* oldest age of segments having the same min cost */ + unsigned int min_segno; /* segment # having min. cost */ + unsigned long long age; /* mtime of GCed section*/ + unsigned long long age_threshold;/* age threshold */ +}; + +struct seg_entry { + unsigned int type:6; /* segment type like CURSEG_XXX_TYPE */ + unsigned int valid_blocks:10; /* # of valid blocks */ + unsigned int ckpt_valid_blocks:10; /* # of valid blocks last cp */ + unsigned int padding:6; /* padding */ + unsigned char *cur_valid_map; /* validity bitmap of blocks */ +#ifdef CONFIG_F2FS_CHECK_FS + unsigned char *cur_valid_map_mir; /* mirror of current valid bitmap */ +#endif + /* + * # of valid blocks and the validity bitmap stored in the last + * checkpoint pack. This information is used by the SSR mode. + */ + unsigned char *ckpt_valid_map; /* validity bitmap of blocks last cp */ + unsigned char *discard_map; + unsigned long long mtime; /* modification time of the segment */ +}; + +struct sec_entry { + unsigned int valid_blocks; /* # of valid blocks in a section */ +}; + +struct segment_allocation { + void (*allocate_segment)(struct f2fs_sb_info *, int, bool); +}; + +#define MAX_SKIP_GC_COUNT 16 + +struct inmem_pages { + struct list_head list; + struct page *page; + block_t old_addr; /* for revoking when fail to commit */ +}; + +struct sit_info { + const struct segment_allocation *s_ops; + + block_t sit_base_addr; /* start block address of SIT area */ + block_t sit_blocks; /* # of blocks used by SIT area */ + block_t written_valid_blocks; /* # of valid blocks in main area */ + char *bitmap; /* all bitmaps pointer */ + char *sit_bitmap; /* SIT bitmap pointer */ +#ifdef CONFIG_F2FS_CHECK_FS + char *sit_bitmap_mir; /* SIT bitmap mirror */ + + /* bitmap of segments to be ignored by GC in case of errors */ + unsigned long *invalid_segmap; +#endif + unsigned int bitmap_size; /* SIT bitmap size */ + + unsigned long *tmp_map; /* bitmap for temporal use */ + unsigned long *dirty_sentries_bitmap; /* bitmap for dirty sentries */ + unsigned int dirty_sentries; /* # of dirty sentries */ + unsigned int sents_per_block; /* # of SIT entries per block */ + struct rw_semaphore sentry_lock; /* to protect SIT cache */ + struct seg_entry *sentries; /* SIT segment-level cache */ + struct sec_entry *sec_entries; /* SIT section-level cache */ + + /* for cost-benefit algorithm in cleaning procedure */ + unsigned long long elapsed_time; /* elapsed time after mount */ + unsigned long long mounted_time; /* mount time */ + unsigned long long min_mtime; /* min. modification time */ + unsigned long long max_mtime; /* max. modification time */ + unsigned long long dirty_min_mtime; /* rerange candidates in GC_AT */ + unsigned long long dirty_max_mtime; /* rerange candidates in GC_AT */ + + unsigned int last_victim[MAX_GC_POLICY]; /* last victim segment # */ +}; + +struct free_segmap_info { + unsigned int start_segno; /* start segment number logically */ + unsigned int free_segments; /* # of free segments */ + unsigned int free_sections; /* # of free sections */ + spinlock_t segmap_lock; /* free segmap lock */ + unsigned long *free_segmap; /* free segment bitmap */ + unsigned long *free_secmap; /* free section bitmap */ +}; + +/* Notice: The order of dirty type is same with CURSEG_XXX in f2fs.h */ +enum dirty_type { + DIRTY_HOT_DATA, /* dirty segments assigned as hot data logs */ + DIRTY_WARM_DATA, /* dirty segments assigned as warm data logs */ + DIRTY_COLD_DATA, /* dirty segments assigned as cold data logs */ + DIRTY_HOT_NODE, /* dirty segments assigned as hot node logs */ + DIRTY_WARM_NODE, /* dirty segments assigned as warm node logs */ + DIRTY_COLD_NODE, /* dirty segments assigned as cold node logs */ + DIRTY, /* to count # of dirty segments */ + PRE, /* to count # of entirely obsolete segments */ + NR_DIRTY_TYPE +}; + +struct dirty_seglist_info { + const struct victim_selection *v_ops; /* victim selction operation */ + unsigned long *dirty_segmap[NR_DIRTY_TYPE]; + unsigned long *dirty_secmap; + struct mutex seglist_lock; /* lock for segment bitmaps */ + int nr_dirty[NR_DIRTY_TYPE]; /* # of dirty segments */ + unsigned long *victim_secmap; /* background GC victims */ +}; + +/* victim selection function for cleaning and SSR */ +struct victim_selection { + int (*get_victim)(struct f2fs_sb_info *, unsigned int *, + int, int, char, unsigned long long); +}; + +/* for active log information */ +struct curseg_info { + struct mutex curseg_mutex; /* lock for consistency */ + struct f2fs_summary_block *sum_blk; /* cached summary block */ + struct rw_semaphore journal_rwsem; /* protect journal area */ + struct f2fs_journal *journal; /* cached journal info */ + unsigned char alloc_type; /* current allocation type */ + unsigned short seg_type; /* segment type like CURSEG_XXX_TYPE */ + unsigned int segno; /* current segment number */ + unsigned short next_blkoff; /* next block offset to write */ + unsigned int zone; /* current zone number */ + unsigned int next_segno; /* preallocated segment */ + bool inited; /* indicate inmem log is inited */ +}; + +struct sit_entry_set { + struct list_head set_list; /* link with all sit sets */ + unsigned int start_segno; /* start segno of sits in set */ + unsigned int entry_cnt; /* the # of sit entries in set */ +}; + +/* + * inline functions + */ +static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type) +{ + return (struct curseg_info *)(SM_I(sbi)->curseg_array + type); +} + +static inline struct seg_entry *get_seg_entry(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + return &sit_i->sentries[segno]; +} + +static inline struct sec_entry *get_sec_entry(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct sit_info *sit_i = SIT_I(sbi); + return &sit_i->sec_entries[GET_SEC_FROM_SEG(sbi, segno)]; +} + +static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi, + unsigned int segno, bool use_section) +{ + /* + * In order to get # of valid blocks in a section instantly from many + * segments, f2fs manages two counting structures separately. + */ + if (use_section && __is_large_section(sbi)) + return get_sec_entry(sbi, segno)->valid_blocks; + else + return get_seg_entry(sbi, segno)->valid_blocks; +} + +static inline unsigned int get_ckpt_valid_blocks(struct f2fs_sb_info *sbi, + unsigned int segno, bool use_section) +{ + if (use_section && __is_large_section(sbi)) { + unsigned int start_segno = START_SEGNO(segno); + unsigned int blocks = 0; + int i; + + for (i = 0; i < sbi->segs_per_sec; i++, start_segno++) { + struct seg_entry *se = get_seg_entry(sbi, start_segno); + + blocks += se->ckpt_valid_blocks; + } + return blocks; + } + return get_seg_entry(sbi, segno)->ckpt_valid_blocks; +} + +static inline void seg_info_from_raw_sit(struct seg_entry *se, + struct f2fs_sit_entry *rs) +{ + se->valid_blocks = GET_SIT_VBLOCKS(rs); + se->ckpt_valid_blocks = GET_SIT_VBLOCKS(rs); + memcpy(se->cur_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); + memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); +#ifdef CONFIG_F2FS_CHECK_FS + memcpy(se->cur_valid_map_mir, rs->valid_map, SIT_VBLOCK_MAP_SIZE); +#endif + se->type = GET_SIT_TYPE(rs); + se->mtime = le64_to_cpu(rs->mtime); +} + +static inline void __seg_info_to_raw_sit(struct seg_entry *se, + struct f2fs_sit_entry *rs) +{ + unsigned short raw_vblocks = (se->type << SIT_VBLOCKS_SHIFT) | + se->valid_blocks; + rs->vblocks = cpu_to_le16(raw_vblocks); + memcpy(rs->valid_map, se->cur_valid_map, SIT_VBLOCK_MAP_SIZE); + rs->mtime = cpu_to_le64(se->mtime); +} + +static inline void seg_info_to_sit_page(struct f2fs_sb_info *sbi, + struct page *page, unsigned int start) +{ + struct f2fs_sit_block *raw_sit; + struct seg_entry *se; + struct f2fs_sit_entry *rs; + unsigned int end = min(start + SIT_ENTRY_PER_BLOCK, + (unsigned long)MAIN_SEGS(sbi)); + int i; + + raw_sit = (struct f2fs_sit_block *)page_address(page); + memset(raw_sit, 0, PAGE_SIZE); + for (i = 0; i < end - start; i++) { + rs = &raw_sit->entries[i]; + se = get_seg_entry(sbi, start + i); + __seg_info_to_raw_sit(se, rs); + } +} + +static inline void seg_info_to_raw_sit(struct seg_entry *se, + struct f2fs_sit_entry *rs) +{ + __seg_info_to_raw_sit(se, rs); + + memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE); + se->ckpt_valid_blocks = se->valid_blocks; +} + +static inline unsigned int find_next_inuse(struct free_segmap_info *free_i, + unsigned int max, unsigned int segno) +{ + unsigned int ret; + spin_lock(&free_i->segmap_lock); + ret = find_next_bit(free_i->free_segmap, max, segno); + spin_unlock(&free_i->segmap_lock); + return ret; +} + +static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); + unsigned int next; + unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno); + + spin_lock(&free_i->segmap_lock); + clear_bit(segno, free_i->free_segmap); + free_i->free_segments++; + + next = find_next_bit(free_i->free_segmap, + start_segno + sbi->segs_per_sec, start_segno); + if (next >= start_segno + usable_segs) { + clear_bit(secno, free_i->free_secmap); + free_i->free_sections++; + } + spin_unlock(&free_i->segmap_lock); +} + +static inline void __set_inuse(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + + set_bit(segno, free_i->free_segmap); + free_i->free_segments--; + if (!test_and_set_bit(secno, free_i->free_secmap)) + free_i->free_sections--; +} + +static inline void __set_test_and_free(struct f2fs_sb_info *sbi, + unsigned int segno, bool inmem) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno); + unsigned int next; + unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno); + + spin_lock(&free_i->segmap_lock); + if (test_and_clear_bit(segno, free_i->free_segmap)) { + free_i->free_segments++; + + if (!inmem && IS_CURSEC(sbi, secno)) + goto skip_free; + next = find_next_bit(free_i->free_segmap, + start_segno + sbi->segs_per_sec, start_segno); + if (next >= start_segno + usable_segs) { + if (test_and_clear_bit(secno, free_i->free_secmap)) + free_i->free_sections++; + } + } +skip_free: + spin_unlock(&free_i->segmap_lock); +} + +static inline void __set_test_and_inuse(struct f2fs_sb_info *sbi, + unsigned int segno) +{ + struct free_segmap_info *free_i = FREE_I(sbi); + unsigned int secno = GET_SEC_FROM_SEG(sbi, segno); + + spin_lock(&free_i->segmap_lock); + if (!test_and_set_bit(segno, free_i->free_segmap)) { + free_i->free_segments--; + if (!test_and_set_bit(secno, free_i->free_secmap)) + free_i->free_sections--; + } + spin_unlock(&free_i->segmap_lock); +} + +static inline void get_sit_bitmap(struct f2fs_sb_info *sbi, + void *dst_addr) +{ + struct sit_info *sit_i = SIT_I(sbi); + +#ifdef CONFIG_F2FS_CHECK_FS + if (memcmp(sit_i->sit_bitmap, sit_i->sit_bitmap_mir, + sit_i->bitmap_size)) + f2fs_bug_on(sbi, 1); +#endif + memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size); +} + +static inline block_t written_block_count(struct f2fs_sb_info *sbi) +{ + return SIT_I(sbi)->written_valid_blocks; +} + +static inline unsigned int free_segments(struct f2fs_sb_info *sbi) +{ + return FREE_I(sbi)->free_segments; +} + +static inline unsigned int reserved_segments(struct f2fs_sb_info *sbi) +{ + return SM_I(sbi)->reserved_segments + + SM_I(sbi)->additional_reserved_segments; +} + +static inline unsigned int free_sections(struct f2fs_sb_info *sbi) +{ + return FREE_I(sbi)->free_sections; +} + +static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi) +{ + return DIRTY_I(sbi)->nr_dirty[PRE]; +} + +static inline unsigned int dirty_segments(struct f2fs_sb_info *sbi) +{ + return DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_DATA] + + DIRTY_I(sbi)->nr_dirty[DIRTY_HOT_NODE] + + DIRTY_I(sbi)->nr_dirty[DIRTY_WARM_NODE] + + DIRTY_I(sbi)->nr_dirty[DIRTY_COLD_NODE]; +} + +static inline int overprovision_segments(struct f2fs_sb_info *sbi) +{ + return SM_I(sbi)->ovp_segments; +} + +static inline int reserved_sections(struct f2fs_sb_info *sbi) +{ + return GET_SEC_FROM_SEG(sbi, reserved_segments(sbi)); +} + +static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi, + unsigned int node_blocks, unsigned int dent_blocks) +{ + + unsigned int segno, left_blocks; + int i; + + /* check current node segment */ + for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) { + segno = CURSEG_I(sbi, i)->segno; + left_blocks = f2fs_usable_blks_in_seg(sbi, segno) - + get_seg_entry(sbi, segno)->ckpt_valid_blocks; + + if (node_blocks > left_blocks) + return false; + } + + /* check current data segment */ + segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno; + left_blocks = f2fs_usable_blks_in_seg(sbi, segno) - + get_seg_entry(sbi, segno)->ckpt_valid_blocks; + if (dent_blocks > left_blocks) + return false; + return true; +} + +static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, + int freed, int needed) +{ + unsigned int total_node_blocks = get_pages(sbi, F2FS_DIRTY_NODES) + + get_pages(sbi, F2FS_DIRTY_DENTS) + + get_pages(sbi, F2FS_DIRTY_IMETA); + unsigned int total_dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS); + unsigned int node_secs = total_node_blocks / BLKS_PER_SEC(sbi); + unsigned int dent_secs = total_dent_blocks / BLKS_PER_SEC(sbi); + unsigned int node_blocks = total_node_blocks % BLKS_PER_SEC(sbi); + unsigned int dent_blocks = total_dent_blocks % BLKS_PER_SEC(sbi); + unsigned int free, need_lower, need_upper; + + if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) + return false; + + free = free_sections(sbi) + freed; + need_lower = node_secs + dent_secs + reserved_sections(sbi) + needed; + need_upper = need_lower + (node_blocks ? 1 : 0) + (dent_blocks ? 1 : 0); + + if (free > need_upper) + return false; + else if (free <= need_lower) + return true; + return !has_curseg_enough_space(sbi, node_blocks, dent_blocks); +} + +static inline bool f2fs_is_checkpoint_ready(struct f2fs_sb_info *sbi) +{ + if (likely(!is_sbi_flag_set(sbi, SBI_CP_DISABLED))) + return true; + if (likely(!has_not_enough_free_secs(sbi, 0, 0))) + return true; + return false; +} + +static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi) +{ + return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments; +} + +static inline int utilization(struct f2fs_sb_info *sbi) +{ + return div_u64((u64)valid_user_blocks(sbi) * 100, + sbi->user_block_count); +} + +/* + * Sometimes f2fs may be better to drop out-of-place update policy. + * And, users can control the policy through sysfs entries. + * There are five policies with triggering conditions as follows. + * F2FS_IPU_FORCE - all the time, + * F2FS_IPU_SSR - if SSR mode is activated, + * F2FS_IPU_UTIL - if FS utilization is over threashold, + * F2FS_IPU_SSR_UTIL - if SSR mode is activated and FS utilization is over + * threashold, + * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash + * storages. IPU will be triggered only if the # of dirty + * pages over min_fsync_blocks. (=default option) + * F2FS_IPU_ASYNC - do IPU given by asynchronous write requests. + * F2FS_IPU_NOCACHE - disable IPU bio cache. + * F2FS_IPUT_DISABLE - disable IPU. (=default option in LFS mode) + */ +#define DEF_MIN_IPU_UTIL 70 +#define DEF_MIN_FSYNC_BLOCKS 8 +#define DEF_MIN_HOT_BLOCKS 16 + +#define SMALL_VOLUME_SEGMENTS (16 * 512) /* 16GB */ + +enum { + F2FS_IPU_FORCE, + F2FS_IPU_SSR, + F2FS_IPU_UTIL, + F2FS_IPU_SSR_UTIL, + F2FS_IPU_FSYNC, + F2FS_IPU_ASYNC, + F2FS_IPU_NOCACHE, +}; + +static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, + int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->segno; +} + +static inline unsigned char curseg_alloc_type(struct f2fs_sb_info *sbi, + int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->alloc_type; +} + +static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type) +{ + struct curseg_info *curseg = CURSEG_I(sbi, type); + return curseg->next_blkoff; +} + +static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno) +{ + f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1); +} + +static inline void verify_fio_blkaddr(struct f2fs_io_info *fio) +{ + struct f2fs_sb_info *sbi = fio->sbi; + + if (__is_valid_data_blkaddr(fio->old_blkaddr)) + verify_blkaddr(sbi, fio->old_blkaddr, __is_meta_io(fio) ? + META_GENERIC : DATA_GENERIC); + verify_blkaddr(sbi, fio->new_blkaddr, __is_meta_io(fio) ? + META_GENERIC : DATA_GENERIC_ENHANCE); +} + +/* + * Summary block is always treated as an invalid block + */ +static inline int check_block_count(struct f2fs_sb_info *sbi, + int segno, struct f2fs_sit_entry *raw_sit) +{ + bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false; + int valid_blocks = 0; + int cur_pos = 0, next_pos; + unsigned int usable_blks_per_seg = f2fs_usable_blks_in_seg(sbi, segno); + + /* check bitmap with valid block count */ + do { + if (is_valid) { + next_pos = find_next_zero_bit_le(&raw_sit->valid_map, + usable_blks_per_seg, + cur_pos); + valid_blocks += next_pos - cur_pos; + } else + next_pos = find_next_bit_le(&raw_sit->valid_map, + usable_blks_per_seg, + cur_pos); + cur_pos = next_pos; + is_valid = !is_valid; + } while (cur_pos < usable_blks_per_seg); + + if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) { + f2fs_err(sbi, "Mismatch valid blocks %d vs. %d", + GET_SIT_VBLOCKS(raw_sit), valid_blocks); + set_sbi_flag(sbi, SBI_NEED_FSCK); + return -EFSCORRUPTED; + } + + if (usable_blks_per_seg < sbi->blocks_per_seg) + f2fs_bug_on(sbi, find_next_bit_le(&raw_sit->valid_map, + sbi->blocks_per_seg, + usable_blks_per_seg) != sbi->blocks_per_seg); + + /* check segment usage, and check boundary of a given segment number */ + if (unlikely(GET_SIT_VBLOCKS(raw_sit) > usable_blks_per_seg + || segno > TOTAL_SEGS(sbi) - 1)) { + f2fs_err(sbi, "Wrong valid blocks %d or segno %u", + GET_SIT_VBLOCKS(raw_sit), segno); + set_sbi_flag(sbi, SBI_NEED_FSCK); + return -EFSCORRUPTED; + } + return 0; +} + +static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi, + unsigned int start) +{ + struct sit_info *sit_i = SIT_I(sbi); + unsigned int offset = SIT_BLOCK_OFFSET(start); + block_t blk_addr = sit_i->sit_base_addr + offset; + + check_seg_range(sbi, start); + +#ifdef CONFIG_F2FS_CHECK_FS + if (f2fs_test_bit(offset, sit_i->sit_bitmap) != + f2fs_test_bit(offset, sit_i->sit_bitmap_mir)) + f2fs_bug_on(sbi, 1); +#endif + + /* calculate sit block address */ + if (f2fs_test_bit(offset, sit_i->sit_bitmap)) + blk_addr += sit_i->sit_blocks; + + return blk_addr; +} + +static inline pgoff_t next_sit_addr(struct f2fs_sb_info *sbi, + pgoff_t block_addr) +{ + struct sit_info *sit_i = SIT_I(sbi); + block_addr -= sit_i->sit_base_addr; + if (block_addr < sit_i->sit_blocks) + block_addr += sit_i->sit_blocks; + else + block_addr -= sit_i->sit_blocks; + + return block_addr + sit_i->sit_base_addr; +} + +static inline void set_to_next_sit(struct sit_info *sit_i, unsigned int start) +{ + unsigned int block_off = SIT_BLOCK_OFFSET(start); + + f2fs_change_bit(block_off, sit_i->sit_bitmap); +#ifdef CONFIG_F2FS_CHECK_FS + f2fs_change_bit(block_off, sit_i->sit_bitmap_mir); +#endif +} + +static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi, + bool base_time) +{ + struct sit_info *sit_i = SIT_I(sbi); + time64_t diff, now = ktime_get_boottime_seconds(); + + if (now >= sit_i->mounted_time) + return sit_i->elapsed_time + now - sit_i->mounted_time; + + /* system time is set to the past */ + if (!base_time) { + diff = sit_i->mounted_time - now; + if (sit_i->elapsed_time >= diff) + return sit_i->elapsed_time - diff; + return 0; + } + return sit_i->elapsed_time; +} + +static inline void set_summary(struct f2fs_summary *sum, nid_t nid, + unsigned int ofs_in_node, unsigned char version) +{ + sum->nid = cpu_to_le32(nid); + sum->ofs_in_node = cpu_to_le16(ofs_in_node); + sum->version = version; +} + +static inline block_t start_sum_block(struct f2fs_sb_info *sbi) +{ + return __start_cp_addr(sbi) + + le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum); +} + +static inline block_t sum_blk_addr(struct f2fs_sb_info *sbi, int base, int type) +{ + return __start_cp_addr(sbi) + + le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_total_block_count) + - (base + 1) + type; +} + +static inline bool sec_usage_check(struct f2fs_sb_info *sbi, unsigned int secno) +{ + if (IS_CURSEC(sbi, secno) || (sbi->cur_victim_sec == secno)) + return true; + return false; +} + +/* + * It is very important to gather dirty pages and write at once, so that we can + * submit a big bio without interfering other data writes. + * By default, 512 pages for directory data, + * 512 pages (2MB) * 8 for nodes, and + * 256 pages * 8 for meta are set. + */ +static inline int nr_pages_to_skip(struct f2fs_sb_info *sbi, int type) +{ + if (sbi->sb->s_bdi->wb.dirty_exceeded) + return 0; + + if (type == DATA) + return sbi->blocks_per_seg; + else if (type == NODE) + return 8 * sbi->blocks_per_seg; + else if (type == META) + return 8 * BIO_MAX_PAGES; + else + return 0; +} + +/* + * When writing pages, it'd better align nr_to_write for segment size. + */ +static inline long nr_pages_to_write(struct f2fs_sb_info *sbi, int type, + struct writeback_control *wbc) +{ + long nr_to_write, desired; + + if (wbc->sync_mode != WB_SYNC_NONE) + return 0; + + nr_to_write = wbc->nr_to_write; + desired = BIO_MAX_PAGES; + if (type == NODE) + desired <<= 1; + + wbc->nr_to_write = desired; + return desired - nr_to_write; +} + +static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force) +{ + struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info; + bool wakeup = false; + int i; + + if (force) + goto wake_up; + + mutex_lock(&dcc->cmd_lock); + for (i = MAX_PLIST_NUM - 1; i >= 0; i--) { + if (i + 1 < dcc->discard_granularity) + break; + if (!list_empty(&dcc->pend_list[i])) { + wakeup = true; + break; + } + } + mutex_unlock(&dcc->cmd_lock); + if (!wakeup || !is_idle(sbi, DISCARD_TIME)) + return; +wake_up: + dcc->discard_wake = 1; + wake_up_interruptible_all(&dcc->discard_wait_queue); +} |