Zheng Liu | c0677e6 | 2012-11-08 15:18:54 -0500 | [diff] [blame] | 1 | /* |
| 2 | * fs/ext4/extents_status.h |
| 3 | * |
| 4 | * Written by Yongqiang Yang <xiaoqiangnk@gmail.com> |
| 5 | * Modified by |
| 6 | * Allison Henderson <achender@linux.vnet.ibm.com> |
| 7 | * Zheng Liu <wenqing.lz@taobao.com> |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #ifndef _EXT4_EXTENTS_STATUS_H |
| 12 | #define _EXT4_EXTENTS_STATUS_H |
| 13 | |
Zheng Liu | 654598b | 2012-11-08 21:57:20 -0500 | [diff] [blame] | 14 | /* |
| 15 | * Turn on ES_DEBUG__ to get lots of info about extent status operations. |
| 16 | */ |
| 17 | #ifdef ES_DEBUG__ |
| 18 | #define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) |
| 19 | #else |
| 20 | #define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) |
| 21 | #endif |
| 22 | |
Theodore Ts'o | 8e919d1 | 2013-02-27 14:54:37 -0500 | [diff] [blame] | 23 | /* |
Dmitry Monakhov | 921f266 | 2013-03-10 21:01:03 -0400 | [diff] [blame] | 24 | * With ES_AGGRESSIVE_TEST defined, the result of es caching will be |
| 25 | * checked with old map_block's result. |
| 26 | */ |
| 27 | #define ES_AGGRESSIVE_TEST__ |
| 28 | |
| 29 | /* |
Theodore Ts'o | 8e919d1 | 2013-02-27 14:54:37 -0500 | [diff] [blame] | 30 | * These flags live in the high bits of extent_status.es_pblk |
| 31 | */ |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 32 | enum { |
| 33 | ES_WRITTEN_B, |
| 34 | ES_UNWRITTEN_B, |
| 35 | ES_DELAYED_B, |
| 36 | ES_HOLE_B, |
| 37 | ES_FLAGS |
| 38 | }; |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 39 | |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 40 | #define ES_SHIFT (sizeof(ext4_fsblk_t)*8 - ES_FLAGS) |
| 41 | #define ES_MASK (~((ext4_fsblk_t)0) << ES_SHIFT) |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 42 | |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 43 | #define EXTENT_STATUS_WRITTEN (1 << ES_WRITTEN_B) |
| 44 | #define EXTENT_STATUS_UNWRITTEN (1 << ES_UNWRITTEN_B) |
| 45 | #define EXTENT_STATUS_DELAYED (1 << ES_DELAYED_B) |
| 46 | #define EXTENT_STATUS_HOLE (1 << ES_HOLE_B) |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 47 | |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 48 | struct ext4_sb_info; |
Zheng Liu | adb2355 | 2013-03-10 21:13:05 -0400 | [diff] [blame] | 49 | struct ext4_extent; |
| 50 | |
Zheng Liu | c0677e6 | 2012-11-08 15:18:54 -0500 | [diff] [blame] | 51 | struct extent_status { |
| 52 | struct rb_node rb_node; |
Zheng Liu | 06b0c88 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 53 | ext4_lblk_t es_lblk; /* first logical block extent covers */ |
| 54 | ext4_lblk_t es_len; /* length of extent in block */ |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 55 | ext4_fsblk_t es_pblk; /* first physical block */ |
Zheng Liu | c0677e6 | 2012-11-08 15:18:54 -0500 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | struct ext4_es_tree { |
| 59 | struct rb_root root; |
| 60 | struct extent_status *cache_es; /* recently accessed extent */ |
| 61 | }; |
| 62 | |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 63 | struct ext4_es_stats { |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 64 | unsigned long es_stats_shrunk; |
| 65 | unsigned long es_stats_cache_hits; |
| 66 | unsigned long es_stats_cache_misses; |
| 67 | u64 es_stats_scan_time; |
| 68 | u64 es_stats_max_scan_time; |
| 69 | struct percpu_counter es_stats_all_cnt; |
Zheng Liu | edaa53c | 2014-11-25 11:45:37 -0500 | [diff] [blame] | 70 | struct percpu_counter es_stats_shk_cnt; |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 71 | }; |
| 72 | |
Zheng Liu | 654598b | 2012-11-08 21:57:20 -0500 | [diff] [blame] | 73 | extern int __init ext4_init_es(void); |
| 74 | extern void ext4_exit_es(void); |
| 75 | extern void ext4_es_init_tree(struct ext4_es_tree *tree); |
| 76 | |
Zheng Liu | 06b0c88 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 77 | extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 78 | ext4_lblk_t len, ext4_fsblk_t pblk, |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 79 | unsigned int status); |
Theodore Ts'o | 107a7bd | 2013-08-16 21:23:41 -0400 | [diff] [blame] | 80 | extern void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk, |
| 81 | ext4_lblk_t len, ext4_fsblk_t pblk, |
| 82 | unsigned int status); |
Zheng Liu | 06b0c88 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 83 | extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, |
Zheng Liu | 654598b | 2012-11-08 21:57:20 -0500 | [diff] [blame] | 84 | ext4_lblk_t len); |
Yan, Zheng | e30b5dc | 2013-05-03 02:15:52 -0400 | [diff] [blame] | 85 | extern void ext4_es_find_delayed_extent_range(struct inode *inode, |
| 86 | ext4_lblk_t lblk, ext4_lblk_t end, |
Zheng Liu | be40136 | 2013-02-18 00:27:26 -0500 | [diff] [blame] | 87 | struct extent_status *es); |
Zheng Liu | d100eef | 2013-02-18 00:29:59 -0500 | [diff] [blame] | 88 | extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk, |
| 89 | struct extent_status *es); |
Zheng Liu | 654598b | 2012-11-08 21:57:20 -0500 | [diff] [blame] | 90 | |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 91 | static inline unsigned int ext4_es_status(struct extent_status *es) |
| 92 | { |
| 93 | return es->es_pblk >> ES_SHIFT; |
| 94 | } |
| 95 | |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 96 | static inline int ext4_es_is_written(struct extent_status *es) |
| 97 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 98 | return (ext4_es_status(es) & EXTENT_STATUS_WRITTEN) != 0; |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static inline int ext4_es_is_unwritten(struct extent_status *es) |
| 102 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 103 | return (ext4_es_status(es) & EXTENT_STATUS_UNWRITTEN) != 0; |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | static inline int ext4_es_is_delayed(struct extent_status *es) |
| 107 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 108 | return (ext4_es_status(es) & EXTENT_STATUS_DELAYED) != 0; |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | static inline int ext4_es_is_hole(struct extent_status *es) |
| 112 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 113 | return (ext4_es_status(es) & EXTENT_STATUS_HOLE) != 0; |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) |
| 117 | { |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 118 | return es->es_pblk & ~ES_MASK; |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static inline void ext4_es_store_pblock(struct extent_status *es, |
| 122 | ext4_fsblk_t pb) |
| 123 | { |
| 124 | ext4_fsblk_t block; |
| 125 | |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 126 | block = (pb & ~ES_MASK) | (es->es_pblk & ES_MASK); |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 127 | es->es_pblk = block; |
| 128 | } |
| 129 | |
| 130 | static inline void ext4_es_store_status(struct extent_status *es, |
Theodore Ts'o | 3be78c7 | 2013-08-16 21:22:41 -0400 | [diff] [blame] | 131 | unsigned int status) |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 132 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 133 | es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | |
| 134 | (es->es_pblk & ~ES_MASK); |
Zheng Liu | fdc0212 | 2013-02-18 00:26:51 -0500 | [diff] [blame] | 135 | } |
| 136 | |
Theodore Ts'o | 9a6633b | 2014-02-19 20:15:15 -0500 | [diff] [blame] | 137 | static inline void ext4_es_store_pblock_status(struct extent_status *es, |
| 138 | ext4_fsblk_t pb, |
| 139 | unsigned int status) |
| 140 | { |
Jan Kara | 624d0f1 | 2014-11-25 11:53:47 -0500 | [diff] [blame^] | 141 | es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | |
| 142 | (pb & ~ES_MASK); |
Theodore Ts'o | 9a6633b | 2014-02-19 20:15:15 -0500 | [diff] [blame] | 143 | } |
| 144 | |
Zheng Liu | eb68d0e | 2014-09-01 22:26:49 -0400 | [diff] [blame] | 145 | extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi); |
Zheng Liu | d3922a7 | 2013-07-01 08:12:37 -0400 | [diff] [blame] | 146 | extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi); |
Zheng Liu | 74cd15c | 2013-02-18 00:32:55 -0500 | [diff] [blame] | 147 | |
Zheng Liu | c0677e6 | 2012-11-08 15:18:54 -0500 | [diff] [blame] | 148 | #endif /* _EXT4_EXTENTS_STATUS_H */ |