Release 4.10 fs/f2fs/segment.h

Directory: fs/f2fs
/*
 * fs/f2fs/segment.h
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#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 */

/* 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)


#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))


#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))   \

#define MAIN_BLKADDR(sbi)       (SM_I(sbi)->main_blkaddr)

#define SEG0_BLKADDR(sbi)	(SM_I(sbi)->seg0_blkaddr)


#define MAIN_SEGS(sbi)	(SM_I(sbi)->main_segments)

#define MAIN_SECS(sbi)	(sbi->total_sections)


#define TOTAL_SEGS(sbi)	(SM_I(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)					\
	(((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ?          \
        NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),                 \
                GET_SEGNO_FROM_SEG0(sbi, blk_addr)))

#define GET_SECNO(sbi, segno)					\
	((segno) / sbi->segs_per_sec)

#define GET_ZONENO_FROM_SEGNO(sbi, segno)				\
	((segno / sbi->segs_per_sec) / sbi->secs_per_zone)


#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)			\
	((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / 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.
 */
enum {
	
LFS = 0,
	
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.
 */
enum {
	
GC_CB = 0,
	
GC_GREEDY
};

/*
 * 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_segmap;	/* dirty segment bitmap */
	
unsigned int max_search;	/* maximum # of segments to search */
	
unsigned int offset;		/* last scanned bitmap offset */
	
unsigned int ofs_unit;		/* bitmap search unit */
	
unsigned int min_cost;		/* minimum cost */
	
unsigned int min_segno;		/* segment # having min. cost */
};


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 */
	/*
         * # of valid blocks and the validity bitmap stored in the 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);
};

/*
 * this value is set in page as a private data which indicate that
 * the page is atomically written, and it is in inmem_pages list.
 */

#define ATOMIC_WRITTEN_PAGE		((unsigned long)-1)


#define IS_ATOMIC_WRITTEN_PAGE(page)			\
		(page_private(page) == (unsigned long)ATOMIC_WRITTEN_PAGE)


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 *sit_bitmap;		/* SIT bitmap pointer */
	
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 mutex 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 */
};


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];
	
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);
};

/* 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 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 */
};


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);
}

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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];
}

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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_SECNO(sbi, segno)];
}

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static inline unsigned int get_valid_blocks(struct f2fs_sb_info *sbi,
				unsigned int segno, int section)
{
	/*
         * In order to get # of valid blocks in a section instantly from many
         * segments, f2fs manages two counting structures separately.
         */
	if (section > 1)
		return get_sec_entry(sbi, segno)->valid_blocks;
	else
		return get_seg_entry(sbi, segno)->valid_blocks;
}

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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);
	se->type = GET_SIT_TYPE(rs);
	se->mtime = le64_to_cpu(rs->mtime);
}

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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);
	memcpy(se->ckpt_valid_map, rs->valid_map, SIT_VBLOCK_MAP_SIZE);
	se->ckpt_valid_blocks = se->valid_blocks;
	rs->mtime = cpu_to_le64(se->mtime);
}

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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;
}

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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 = segno / sbi->segs_per_sec;
	unsigned int start_segno = secno * sbi->segs_per_sec;
	unsigned int next;

	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 + sbi->segs_per_sec) {
		clear_bit(secno, free_i->free_secmap);
		free_i->free_sections++;
	}
	spin_unlock(&free_i->segmap_lock);
}

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Total 123 100.00% 3 100.00%



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 = segno / sbi->segs_per_sec;
	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--;
}

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static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
		unsigned int segno)
{
	struct free_segmap_info *free_i = FREE_I(sbi);
	unsigned int secno = segno / sbi->segs_per_sec;
	unsigned int start_segno = secno * sbi->segs_per_sec;
	unsigned int next;

	spin_lock(&free_i->segmap_lock);
	if (test_and_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 + sbi->segs_per_sec) {
			if (test_and_clear_bit(secno, free_i->free_secmap))
				free_i->free_sections++;
		}
	}
	spin_unlock(&free_i->segmap_lock);
}

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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 = segno / sbi->segs_per_sec;
	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);
}

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static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
		void *dst_addr)
{
	struct sit_info *sit_i = SIT_I(sbi);
	memcpy(dst_addr, sit_i->sit_bitmap, sit_i->bitmap_size);
}

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static inline block_t written_block_count(struct f2fs_sb_info *sbi)
{
	return SIT_I(sbi)->written_valid_blocks;
}

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static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
{
	return FREE_I(sbi)->free_segments;
}

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static inline int reserved_segments(struct f2fs_sb_info *sbi)
{
	return SM_I(sbi)->reserved_segments;
}

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static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
{
	return FREE_I(sbi)->free_sections;
}

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static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)
{
	return DIRTY_I(sbi)->nr_dirty[PRE];
}

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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];
}

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static inline int overprovision_segments(struct f2fs_sb_info *sbi)
{
	return SM_I(sbi)->ovp_segments;
}

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static inline int overprovision_sections(struct f2fs_sb_info *sbi)
{
	return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec;
}

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static inline int reserved_sections(struct f2fs_sb_info *sbi)
{
	return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec;
}

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static inline bool need_SSR(struct f2fs_sb_info *sbi)
{
	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
	int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);

	if (test_opt(sbi, LFS))
		return false;

	return free_sections(sbi) <= (node_secs + 2 * dent_secs + imeta_secs +
						reserved_sections(sbi) + 1);
}

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static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi,
					int freed, int needed)
{
	int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
	int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);

	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
		return false;

	return (free_sections(sbi) + freed) <=
		(node_secs + 2 * dent_secs + imeta_secs +
		reserved_sections(sbi) + needed);
}

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static inline bool excess_prefree_segs(struct f2fs_sb_info *sbi)
{
	return prefree_segments(sbi) > SM_I(sbi)->rec_prefree_segments;
}

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jaegeuk kim jaegeuk kim 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



static inline int utilization(struct f2fs_sb_info *sbi)
{
	return div_u64((u64)valid_user_blocks(sbi) * 100,
					sbi->user_block_count);
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 26 86.67% 2 66.67%
changman lee changman lee 4 13.33% 1 33.33%
Total 30 100.00% 3 100.00%

/*
 * 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.
 * F2FS_IPUT_DISABLE - disable IPU. (=default option)
 */

#define DEF_MIN_IPU_UTIL	70

#define DEF_MIN_FSYNC_BLOCKS	8

enum {
	
F2FS_IPU_FORCE,
	
F2FS_IPU_SSR,
	
F2FS_IPU_UTIL,
	
F2FS_IPU_SSR_UTIL,
	
F2FS_IPU_FSYNC,
};



static inline bool need_inplace_update(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	unsigned int policy = SM_I(sbi)->ipu_policy;

	/* IPU can be done only for the user data */
	if (S_ISDIR(inode->i_mode) || f2fs_is_atomic_file(inode))
		return false;

	if (test_opt(sbi, LFS))
		return false;

	if (policy & (0x1 << F2FS_IPU_FORCE))
		return true;
	if (policy & (0x1 << F2FS_IPU_SSR) && need_SSR(sbi))
		return true;
	if (policy & (0x1 << F2FS_IPU_UTIL) &&
			utilization(sbi) > SM_I(sbi)->min_ipu_util)
		return true;
	if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && need_SSR(sbi) &&
			utilization(sbi) > SM_I(sbi)->min_ipu_util)
		return true;

	/* this is only set during fdatasync */
	if (policy & (0x1 << F2FS_IPU_FSYNC) &&
			is_inode_flag_set(inode, FI_NEED_IPU))
		return true;

	return false;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 173 100.00% 7 100.00%
Total 173 100.00% 7 100.00%



static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi,
		int type)
{
	struct curseg_info *curseg = CURSEG_I(sbi, type);
	return curseg->segno;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



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;
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%



static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
{
	f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 27 90.00% 2 66.67%
liu xue liu xue 3 10.00% 1 33.33%
Total 30 100.00% 3 100.00%



static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
	BUG_ON(blk_addr < SEG0_BLKADDR(sbi)
			|| blk_addr >= MAX_BLKADDR(sbi));
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 30 93.75% 2 50.00%
liu xue liu xue 1 3.12% 1 25.00%
yunlei he yunlei he 1 3.12% 1 25.00%
Total 32 100.00% 4 100.00%

/*
 * Summary block is always treated as an invalid block
 */


static inline void check_block_count(struct f2fs_sb_info *sbi,
		int segno, struct f2fs_sit_entry *raw_sit)
{
#ifdef CONFIG_F2FS_CHECK_FS
	bool is_valid  = test_bit_le(0, raw_sit->valid_map) ? true : false;
	int valid_blocks = 0;
	int cur_pos = 0, next_pos;

	/* check bitmap with valid block count */
	do {
		if (is_valid) {
			next_pos = find_next_zero_bit_le(&raw_sit->valid_map,
					sbi->blocks_per_seg,
					cur_pos);
			valid_blocks += next_pos - cur_pos;
		} else
			next_pos = find_next_bit_le(&raw_sit->valid_map,
					sbi->blocks_per_seg,
					cur_pos);
		cur_pos = next_pos;
		is_valid = !is_valid;
	} while (cur_pos < sbi->blocks_per_seg);
	BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
#endif
	/* check segment usage, and check boundary of a given segment number */
	f2fs_bug_on(sbi, GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
					|| segno > TOTAL_SEGS(sbi) - 1);
}

Contributors
Person Tokens Prop Commits CommitProp
chao yu chao yu 77 50.00% 1 20.00%
jaegeuk kim jaegeuk kim 76 49.35% 3 60.00%
liu xue liu xue 1 0.65% 1 20.00%
Total 154 100.00% 5 100.00%



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);

	/* calculate sit block address */
	if (f2fs_test_bit(offset, sit_i->sit_bitmap))
		blk_addr += sit_i->sit_blocks;

	return blk_addr;
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 59 100.00% 1 100.00%
Total 59 100.00% 1 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 33 97.06% 1 50.00%
gu zheng gu zheng 1 2.94% 1 50.00%
Total 34 100.00% 2 100.00%



static inline unsigned long long get_mtime(struct f2fs_sb_info *sbi)
{
	struct sit_info *sit_i = SIT_I(sbi);
	return sit_i->elapsed_time + CURRENT_TIME_SEC.tv_sec -
						sit_i->mounted_time;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 37 100.00% 1 100.00%
Total 37 100.00% 1 100.00%



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;
}

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jaegeuk kim jaegeuk kim 47 100.00% 1 100.00%
Total 47 100.00% 1 100.00%



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);
}

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Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 28 100.00% 1 100.00%
Total 28 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 39 100.00% 1 100.00%
Total 39 100.00% 1 100.00%

/*
 * 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) * 3 for three types of nodes, and
 * max_bio_blocks 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;
}

Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 69 97.18% 5 83.33%
tejun heo tejun heo 2 2.82% 1 16.67%
Total 71 100.00% 6 100.00%

/*
 * 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;
}
Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 67 100.00% 2 100.00%
Total 67 100.00% 2 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
jaegeuk kim jaegeuk kim 2908 93.15% 39 59.09%
chao yu chao yu 180 5.77% 13 19.70%
changman lee changman lee 6 0.19% 2 3.03%
namjae jeon namjae jeon 5 0.16% 3 4.55%
jin xu jin xu 5 0.16% 1 1.52%
tejun heo tejun heo 5 0.16% 2 3.03%
liu xue liu xue 5 0.16% 1 1.52%
wanpeng li wanpeng li 4 0.13% 1 1.52%
yunlei he yunlei he 1 0.03% 1 1.52%
dan carpenter dan carpenter 1 0.03% 1 1.52%
arter 97 arter 97 1 0.03% 1 1.52%
gu zheng gu zheng 1 0.03% 1 1.52%
Total 3122 100.00% 66 100.00%
Directory: fs/f2fs

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
jaegeuk kim	jaegeuk kim	34	100.00%	1	100.00%
	Total	34	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.10 fs/f2fs/segment.h

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