diff options
Diffstat (limited to 'fs/ext4/extents_status.h')
| -rw-r--r-- | fs/ext4/extents_status.h | 91 |
1 files changed, 60 insertions, 31 deletions
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index f1b62a419920..691b52613ce4 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -29,25 +29,28 @@ /* * These flags live in the high bits of extent_status.es_pblk */ -#define ES_SHIFT 60 - -#define EXTENT_STATUS_WRITTEN (1 << 3) -#define EXTENT_STATUS_UNWRITTEN (1 << 2) -#define EXTENT_STATUS_DELAYED (1 << 1) -#define EXTENT_STATUS_HOLE (1 << 0) +enum { + ES_WRITTEN_B, + ES_UNWRITTEN_B, + ES_DELAYED_B, + ES_HOLE_B, + ES_REFERENCED_B, + ES_FLAGS +}; -#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \ - EXTENT_STATUS_UNWRITTEN | \ - EXTENT_STATUS_DELAYED | \ - EXTENT_STATUS_HOLE) +#define ES_SHIFT (sizeof(ext4_fsblk_t)*8 - ES_FLAGS) +#define ES_MASK (~((ext4_fsblk_t)0) << ES_SHIFT) -#define ES_WRITTEN (1ULL << 63) -#define ES_UNWRITTEN (1ULL << 62) -#define ES_DELAYED (1ULL << 61) -#define ES_HOLE (1ULL << 60) +#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_MASK (ES_WRITTEN | ES_UNWRITTEN | \ - ES_DELAYED | ES_HOLE) +#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; @@ -64,6 +67,16 @@ struct ext4_es_tree { 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); @@ -82,29 +95,49 @@ extern void ext4_es_find_delayed_extent_range(struct inode *inode, 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; +} + +static inline unsigned int ext4_es_type(struct extent_status *es) +{ + return (es->es_pblk & ES_TYPE_MASK) >> ES_SHIFT; +} + static inline int ext4_es_is_written(struct extent_status *es) { - return (es->es_pblk & ES_WRITTEN) != 0; + return (ext4_es_type(es) & EXTENT_STATUS_WRITTEN) != 0; } static inline int ext4_es_is_unwritten(struct extent_status *es) { - return (es->es_pblk & ES_UNWRITTEN) != 0; + return (ext4_es_type(es) & EXTENT_STATUS_UNWRITTEN) != 0; } static inline int ext4_es_is_delayed(struct extent_status *es) { - return (es->es_pblk & ES_DELAYED) != 0; + return (ext4_es_type(es) & EXTENT_STATUS_DELAYED) != 0; } static inline int ext4_es_is_hole(struct extent_status *es) { - return (es->es_pblk & ES_HOLE) != 0; + return (ext4_es_type(es) & EXTENT_STATUS_HOLE) != 0; } -static inline unsigned int ext4_es_status(struct extent_status *es) +static inline void ext4_es_set_referenced(struct extent_status *es) { - return es->es_pblk >> ES_SHIFT; + es->es_pblk |= ((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT; +} + +static inline void ext4_es_clear_referenced(struct extent_status *es) +{ + es->es_pblk &= ~(((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT); +} + +static inline int ext4_es_is_referenced(struct extent_status *es) +{ + return (ext4_es_status(es) & EXTENT_STATUS_REFERENCED) != 0; } static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) @@ -124,23 +157,19 @@ static inline void ext4_es_store_pblock(struct extent_status *es, static inline void ext4_es_store_status(struct extent_status *es, unsigned int status) { - es->es_pblk = (((ext4_fsblk_t) - (status & EXTENT_STATUS_FLAGS) << ES_SHIFT) | - (es->es_pblk & ~ES_MASK)); + es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | + (es->es_pblk & ~ES_MASK); } 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 & EXTENT_STATUS_FLAGS) << ES_SHIFT) | - (pb & ~ES_MASK)); + es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | + (pb & ~ES_MASK); } -extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi); +extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi); extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi); -extern void ext4_es_lru_add(struct inode *inode); -extern void ext4_es_lru_del(struct inode *inode); #endif /* _EXT4_EXTENTS_STATUS_H */ |