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linux-stable/fs/f2fs/segment.h
Chao Yu 184a5cd2ce f2fs: refactor flush_sit_entries codes for reducing SIT writes 
In commit aec71382c6 ("f2fs: refactor flush_nat_entries codes for reducing NAT
writes"), we descripte the issue as below:

"Although building NAT journal in cursum reduce the read/write work for NAT
block, but previous design leave us lower performance when write checkpoint
frequently for these cases:
1. if journal in cursum has already full, it's a bit of waste that we flush all
   nat entries to page for persistence, but not to cache any entries.
2. if journal in cursum is not full, we fill nat entries to journal util
   journal is full, then flush the left dirty entries to disk without merge
   journaled entries, so these journaled entries may be flushed to disk at next
   checkpoint but lost chance to flushed last time."

Actually, we have the same problem in using SIT journal area.

In this patch, firstly we will update sit journal with dirty entries as many as
possible. Secondly if there is no space in sit journal, we will remove all
entries in journal and walk through the whole dirty entry bitmap of sit,
accounting dirty sit entries located in same SIT block to sit entry set. All
entry sets are linked to list sit_entry_set in sm_info, sorted ascending order
by count of entries in set. Later we flush entries in set which have fewest
entries into journal as many as we can, and then flush dense set with merged
entries to disk.

In this way we can use sit journal area more effectively, also we will reduce
SIT update, result in gaining in performance and saving lifetime of flash
device.

In my testing environment, it shows this patch can help to reduce SIT block
update obviously.

virtual machine + hard disk:
fsstress -p 20 -n 400 -l 5
		sit page num	cp count	sit pages/cp
based		2006.50		1349.75		1.486
patched		1566.25		1463.25		1.070

Our latency of merging op is small when handling a great number of dirty SIT
entries in flush_sit_entries:
latency(ns)	dirty sit count
36038		2151
49168		2123
37174		2232

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-09 13:15:05 -07:00

751 lines
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/*
* 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>
/* constant macro */
#define NULL_SEGNO ((unsigned int)(~0))
#define NULL_SECNO ((unsigned int)(~0))
#define DEF_RECLAIM_PREFREE_SEGMENTS 5 /* 5% over total segments */
/* 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 START_BLOCK(sbi, segno) \
(SM_I(sbi)->seg0_blkaddr + \
(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 MAIN_BASE_BLOCK(sbi) (SM_I(sbi)->main_blkaddr)
#define GET_SEGOFF_FROM_SEG0(sbi, blk_addr) \
((blk_addr) - SM_I(sbi)->seg0_blkaddr)
#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) \
((TOTAL_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK)
#define f2fs_bitmap_size(nr) \
(BITS_TO_LONGS(nr) * sizeof(unsigned long))
#define TOTAL_SEGS(sbi) (SM_I(sbi)->main_segments)
#define TOTAL_SECS(sbi) (sbi->total_sections)
#define SECTOR_FROM_BLOCK(sbi, blk_addr) \
(((sector_t)blk_addr) << (sbi)->log_sectors_per_block)
#define SECTOR_TO_BLOCK(sbi, sectors) \
(sectors >> (sbi)->log_sectors_per_block)
#define MAX_BIO_BLOCKS(max_hw_blocks) \
(min((int)max_hw_blocks, BIO_MAX_PAGES))
/*
* 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.
*/
enum {
BG_GC = 0,
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 short valid_blocks; /* # of valid blocks */
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 short ckpt_valid_blocks;
unsigned char *ckpt_valid_map;
unsigned char type; /* segment type like CURSEG_XXX_TYPE */
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);
};
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 *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 */
rwlock_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 */
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);
}
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_SECNO(sbi, segno)];
}
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;
}
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);
}
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);
}
static inline unsigned int find_next_inuse(struct free_segmap_info *free_i,
unsigned int max, unsigned int segno)
{
unsigned int ret;
read_lock(&free_i->segmap_lock);
ret = find_next_bit(free_i->free_segmap, max, segno);
read_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 = segno / sbi->segs_per_sec;
unsigned int start_segno = secno * sbi->segs_per_sec;
unsigned int next;
write_lock(&free_i->segmap_lock);
clear_bit(segno, free_i->free_segmap);
free_i->free_segments++;
next = find_next_bit(free_i->free_segmap, TOTAL_SEGS(sbi), start_segno);
if (next >= start_segno + sbi->segs_per_sec) {
clear_bit(secno, free_i->free_secmap);
free_i->free_sections++;
}
write_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 = 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--;
}
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;
write_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++;
}
}
write_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 = segno / sbi->segs_per_sec;
write_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--;
}
write_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);
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 int reserved_segments(struct f2fs_sb_info *sbi)
{
return SM_I(sbi)->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 overprovision_sections(struct f2fs_sb_info *sbi)
{
return ((unsigned int) overprovision_segments(sbi)) / sbi->segs_per_sec;
}
static inline int reserved_sections(struct f2fs_sb_info *sbi)
{
return ((unsigned int) reserved_segments(sbi)) / sbi->segs_per_sec;
}
static inline bool need_SSR(struct f2fs_sb_info *sbi)
{
return (prefree_segments(sbi) / sbi->segs_per_sec)
+ free_sections(sbi) < overprovision_sections(sbi);
}
static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed)
{
int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES);
int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
if (unlikely(sbi->por_doing))
return false;
return (free_sections(sbi) + freed) <= (node_secs + 2 * dent_secs +
reserved_sections(sbi));
}
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_IPUT_DISABLE - disable IPU. (=default option)
*/
#define DEF_MIN_IPU_UTIL 70
enum {
F2FS_IPU_FORCE,
F2FS_IPU_SSR,
F2FS_IPU_UTIL,
F2FS_IPU_SSR_UTIL,
F2FS_IPU_DISABLE,
};
static inline bool need_inplace_update(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
/* IPU can be done only for the user data */
if (S_ISDIR(inode->i_mode))
return false;
/* this is only set during fdatasync */
if (is_inode_flag_set(F2FS_I(inode), FI_NEED_IPU))
return true;
switch (SM_I(sbi)->ipu_policy) {
case F2FS_IPU_FORCE:
return true;
case F2FS_IPU_SSR:
if (need_SSR(sbi))
return true;
break;
case F2FS_IPU_UTIL:
if (utilization(sbi) > SM_I(sbi)->min_ipu_util)
return true;
break;
case F2FS_IPU_SSR_UTIL:
if (need_SSR(sbi) && utilization(sbi) > SM_I(sbi)->min_ipu_util)
return true;
break;
case F2FS_IPU_DISABLE:
break;
}
return false;
}
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;
}
#ifdef CONFIG_F2FS_CHECK_FS
static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
{
unsigned int end_segno = SM_I(sbi)->segment_count - 1;
BUG_ON(segno > end_segno);
}
static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
block_t start_addr = sm_info->seg0_blkaddr;
block_t end_addr = start_addr + total_blks - 1;
BUG_ON(blk_addr < start_addr);
BUG_ON(blk_addr > end_addr);
}
/*
* 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)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
unsigned int end_segno = sm_info->segment_count - 1;
bool is_valid = test_bit_le(0, raw_sit->valid_map) ? true : false;
int valid_blocks = 0;
int cur_pos = 0, next_pos;
/* check segment usage */
BUG_ON(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg);
/* check boundary of a given segment number */
BUG_ON(segno > end_segno);
/* 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);
}
#else
static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
{
unsigned int end_segno = SM_I(sbi)->segment_count - 1;
if (segno > end_segno)
sbi->need_fsck = true;
}
static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
block_t total_blks = sm_info->segment_count << sbi->log_blocks_per_seg;
block_t start_addr = sm_info->seg0_blkaddr;
block_t end_addr = start_addr + total_blks - 1;
if (blk_addr < start_addr || blk_addr > end_addr)
sbi->need_fsck = true;
}
/*
* 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)
{
unsigned int end_segno = SM_I(sbi)->segment_count - 1;
/* check segment usage */
if (GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg)
sbi->need_fsck = true;
/* check boundary of a given segment number */
if (segno > end_segno)
sbi->need_fsck = true;
}
#endif
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;
}
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);
if (f2fs_test_bit(block_off, sit_i->sit_bitmap))
f2fs_clear_bit(block_off, sit_i->sit_bitmap);
else
f2fs_set_bit(block_off, sit_i->sit_bitmap);
}
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;
}
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;
}
static inline unsigned int max_hw_blocks(struct f2fs_sb_info *sbi)
{
struct block_device *bdev = sbi->sb->s_bdev;
struct request_queue *q = bdev_get_queue(bdev);
return SECTOR_TO_BLOCK(sbi, queue_max_sectors(q));
}
/*
* 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 (type == DATA)
return sbi->blocks_per_seg;
else if (type == NODE)
return 3 * sbi->blocks_per_seg;
else if (type == META)
return MAX_BIO_BLOCKS(max_hw_blocks(sbi));
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;
if (type == DATA)
desired = 4096;
else if (type == NODE)
desired = 3 * max_hw_blocks(sbi);
else
desired = MAX_BIO_BLOCKS(max_hw_blocks(sbi));
wbc->nr_to_write = desired;
return desired - nr_to_write;
}
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