Release 4.15 fs/ext4/extents_status.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* fs/ext4/extents_status.h
*
* Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
* Modified by
* Allison Henderson <achender@linux.vnet.ibm.com>
* Zheng Liu <wenqing.lz@taobao.com>
*
*/
#ifndef _EXT4_EXTENTS_STATUS_H
#define _EXT4_EXTENTS_STATUS_H
/*
* Turn on ES_DEBUG__ to get lots of info about extent status operations.
*/
#ifdef ES_DEBUG__
#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__)
#else
#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
#endif
/*
* With ES_AGGRESSIVE_TEST defined, the result of es caching will be
* checked with old map_block's result.
*/
#define ES_AGGRESSIVE_TEST__
/*
* These flags live in the high bits of extent_status.es_pblk
*/
enum {
ES_WRITTEN_B,
ES_UNWRITTEN_B,
ES_DELAYED_B,
ES_HOLE_B,
ES_REFERENCED_B,
ES_FLAGS
};
#define ES_SHIFT (sizeof(ext4_fsblk_t)*8 - ES_FLAGS)
#define ES_MASK (~((ext4_fsblk_t)0) << ES_SHIFT)
#define EXTENT_STATUS_WRITTEN (1 << ES_WRITTEN_B)
#define EXTENT_STATUS_UNWRITTEN (1 << ES_UNWRITTEN_B)
#define EXTENT_STATUS_DELAYED (1 << ES_DELAYED_B)
#define EXTENT_STATUS_HOLE (1 << ES_HOLE_B)
#define EXTENT_STATUS_REFERENCED (1 << ES_REFERENCED_B)
#define ES_TYPE_MASK ((ext4_fsblk_t)(EXTENT_STATUS_WRITTEN | \
EXTENT_STATUS_UNWRITTEN | \
EXTENT_STATUS_DELAYED | \
EXTENT_STATUS_HOLE) << ES_SHIFT)
struct ext4_sb_info;
struct ext4_extent;
struct extent_status {
struct rb_node rb_node;
ext4_lblk_t es_lblk; /* first logical block extent covers */
ext4_lblk_t es_len; /* length of extent in block */
ext4_fsblk_t es_pblk; /* first physical block */
};
struct ext4_es_tree {
struct rb_root root;
struct extent_status *cache_es; /* recently accessed extent */
};
struct ext4_es_stats {
unsigned long es_stats_shrunk;
unsigned long es_stats_cache_hits;
unsigned long es_stats_cache_misses;
u64 es_stats_scan_time;
u64 es_stats_max_scan_time;
struct percpu_counter es_stats_all_cnt;
struct percpu_counter es_stats_shk_cnt;
};
extern int __init ext4_init_es(void);
extern void ext4_exit_es(void);
extern void ext4_es_init_tree(struct ext4_es_tree *tree);
extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len, ext4_fsblk_t pblk,
unsigned int status);
extern void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len, ext4_fsblk_t pblk,
unsigned int status);
extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
ext4_lblk_t len);
extern void ext4_es_find_delayed_extent_range(struct inode *inode,
ext4_lblk_t lblk, ext4_lblk_t end,
struct extent_status *es);
extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
struct extent_status *es);
static inline unsigned int ext4_es_status(struct extent_status *es)
{
return es->es_pblk >> ES_SHIFT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 16 | 80.00% | 1 | 50.00% |
| Jan Kara | 4 | 20.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static inline unsigned int ext4_es_type(struct extent_status *es)
{
return (es->es_pblk & ES_TYPE_MASK) >> ES_SHIFT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static inline int ext4_es_is_written(struct extent_status *es)
{
return (ext4_es_type(es) & EXTENT_STATUS_WRITTEN) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 17 | 70.83% | 1 | 25.00% |
| Jan Kara | 5 | 20.83% | 2 | 50.00% |
| Theodore Y. Ts'o | 2 | 8.33% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
static inline int ext4_es_is_unwritten(struct extent_status *es)
{
return (ext4_es_type(es) & EXTENT_STATUS_UNWRITTEN) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 17 | 70.83% | 1 | 25.00% |
| Jan Kara | 5 | 20.83% | 2 | 50.00% |
| Theodore Y. Ts'o | 2 | 8.33% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
static inline int ext4_es_is_delayed(struct extent_status *es)
{
return (ext4_es_type(es) & EXTENT_STATUS_DELAYED) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 17 | 70.83% | 1 | 25.00% |
| Jan Kara | 5 | 20.83% | 2 | 50.00% |
| Theodore Y. Ts'o | 2 | 8.33% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
static inline int ext4_es_is_hole(struct extent_status *es)
{
return (ext4_es_type(es) & EXTENT_STATUS_HOLE) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 13 | 54.17% | 1 | 25.00% |
| Jan Kara | 10 | 41.67% | 2 | 50.00% |
| Theodore Y. Ts'o | 1 | 4.17% | 1 | 25.00% |
| Total | 24 | 100.00% | 4 | 100.00% |
static inline void ext4_es_set_referenced(struct extent_status *es)
{
es->es_pblk |= ((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static inline void ext4_es_clear_referenced(struct extent_status *es)
{
es->es_pblk &= ~(((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
static inline int ext4_es_is_referenced(struct extent_status *es)
{
return (ext4_es_status(es) & EXTENT_STATUS_REFERENCED) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Kara | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
{
return es->es_pblk & ~ES_MASK;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 19 | 95.00% | 1 | 50.00% |
| Theodore Y. Ts'o | 1 | 5.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static inline void ext4_es_store_pblock(struct extent_status *es,
ext4_fsblk_t pb)
{
ext4_fsblk_t block;
block = (pb & ~ES_MASK) | (es->es_pblk & ES_MASK);
es->es_pblk = block;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 39 | 95.12% | 1 | 50.00% |
| Theodore Y. Ts'o | 2 | 4.88% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static inline void ext4_es_store_status(struct extent_status *es,
unsigned int status)
{
es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) |
(es->es_pblk & ~ES_MASK);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 27 | 64.29% | 1 | 33.33% |
| Theodore Y. Ts'o | 10 | 23.81% | 1 | 33.33% |
| Jan Kara | 5 | 11.90% | 1 | 33.33% |
| Total | 42 | 100.00% | 3 | 100.00% |
static inline void ext4_es_store_pblock_status(struct extent_status *es,
ext4_fsblk_t pb,
unsigned int status)
{
es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) |
(pb & ~ES_MASK);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Theodore Y. Ts'o | 38 | 88.37% | 1 | 50.00% |
| Jan Kara | 5 | 11.63% | 1 | 50.00% |
| Total | 43 | 100.00% | 2 | 100.00% |
extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern int ext4_seq_es_shrinker_info_show(struct seq_file *seq, void *v);
#endif /* _EXT4_EXTENTS_STATUS_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Zheng Liu | 404 | 58.98% | 11 | 52.38% |
| Jan Kara | 172 | 25.11% | 2 | 9.52% |
| Theodore Y. Ts'o | 100 | 14.60% | 5 | 23.81% |
| Zheng Yan | 4 | 0.58% | 1 | 4.76% |
| Dmitriy Monakhov | 4 | 0.58% | 1 | 4.76% |
| Greg Kroah-Hartman | 1 | 0.15% | 1 | 4.76% |
| Total | 685 | 100.00% | 21 | 100.00% |
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