Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c0677e6d ZL |
2 | /* |
3 | * fs/ext4/extents_status.h | |
4 | * | |
5 | * Written by Yongqiang Yang <xiaoqiangnk@gmail.com> | |
6 | * Modified by | |
7 | * Allison Henderson <achender@linux.vnet.ibm.com> | |
8 | * Zheng Liu <wenqing.lz@taobao.com> | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef _EXT4_EXTENTS_STATUS_H | |
13 | #define _EXT4_EXTENTS_STATUS_H | |
14 | ||
654598be ZL |
15 | /* |
16 | * Turn on ES_DEBUG__ to get lots of info about extent status operations. | |
17 | */ | |
18 | #ifdef ES_DEBUG__ | |
19 | #define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) | |
20 | #else | |
21 | #define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) | |
22 | #endif | |
23 | ||
921f266b DM |
24 | /* |
25 | * With ES_AGGRESSIVE_TEST defined, the result of es caching will be | |
26 | * checked with old map_block's result. | |
27 | */ | |
28 | #define ES_AGGRESSIVE_TEST__ | |
29 | ||
8e919d13 TT |
30 | /* |
31 | * These flags live in the high bits of extent_status.es_pblk | |
32 | */ | |
624d0f1d JK |
33 | enum { |
34 | ES_WRITTEN_B, | |
35 | ES_UNWRITTEN_B, | |
36 | ES_DELAYED_B, | |
37 | ES_HOLE_B, | |
2be12de9 | 38 | ES_REFERENCED_B, |
624d0f1d JK |
39 | ES_FLAGS |
40 | }; | |
fdc0212e | 41 | |
624d0f1d JK |
42 | #define ES_SHIFT (sizeof(ext4_fsblk_t)*8 - ES_FLAGS) |
43 | #define ES_MASK (~((ext4_fsblk_t)0) << ES_SHIFT) | |
3be78c73 | 44 | |
624d0f1d JK |
45 | #define EXTENT_STATUS_WRITTEN (1 << ES_WRITTEN_B) |
46 | #define EXTENT_STATUS_UNWRITTEN (1 << ES_UNWRITTEN_B) | |
47 | #define EXTENT_STATUS_DELAYED (1 << ES_DELAYED_B) | |
48 | #define EXTENT_STATUS_HOLE (1 << ES_HOLE_B) | |
2be12de9 JK |
49 | #define EXTENT_STATUS_REFERENCED (1 << ES_REFERENCED_B) |
50 | ||
51 | #define ES_TYPE_MASK ((ext4_fsblk_t)(EXTENT_STATUS_WRITTEN | \ | |
52 | EXTENT_STATUS_UNWRITTEN | \ | |
53 | EXTENT_STATUS_DELAYED | \ | |
54 | EXTENT_STATUS_HOLE) << ES_SHIFT) | |
3be78c73 | 55 | |
d3922a77 | 56 | struct ext4_sb_info; |
adb23551 ZL |
57 | struct ext4_extent; |
58 | ||
c0677e6d ZL |
59 | struct extent_status { |
60 | struct rb_node rb_node; | |
06b0c886 ZL |
61 | ext4_lblk_t es_lblk; /* first logical block extent covers */ |
62 | ext4_lblk_t es_len; /* length of extent in block */ | |
fdc0212e | 63 | ext4_fsblk_t es_pblk; /* first physical block */ |
c0677e6d ZL |
64 | }; |
65 | ||
66 | struct ext4_es_tree { | |
67 | struct rb_root root; | |
68 | struct extent_status *cache_es; /* recently accessed extent */ | |
69 | }; | |
70 | ||
eb68d0e2 | 71 | struct ext4_es_stats { |
eb68d0e2 ZL |
72 | unsigned long es_stats_shrunk; |
73 | unsigned long es_stats_cache_hits; | |
74 | unsigned long es_stats_cache_misses; | |
75 | u64 es_stats_scan_time; | |
76 | u64 es_stats_max_scan_time; | |
77 | struct percpu_counter es_stats_all_cnt; | |
edaa53ca | 78 | struct percpu_counter es_stats_shk_cnt; |
eb68d0e2 ZL |
79 | }; |
80 | ||
654598be ZL |
81 | extern int __init ext4_init_es(void); |
82 | extern void ext4_exit_es(void); | |
83 | extern void ext4_es_init_tree(struct ext4_es_tree *tree); | |
84 | ||
06b0c886 | 85 | extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, |
fdc0212e | 86 | ext4_lblk_t len, ext4_fsblk_t pblk, |
3be78c73 | 87 | unsigned int status); |
107a7bd3 TT |
88 | extern void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk, |
89 | ext4_lblk_t len, ext4_fsblk_t pblk, | |
90 | unsigned int status); | |
06b0c886 | 91 | extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, |
654598be | 92 | ext4_lblk_t len); |
e30b5dca YZ |
93 | extern void ext4_es_find_delayed_extent_range(struct inode *inode, |
94 | ext4_lblk_t lblk, ext4_lblk_t end, | |
be401363 | 95 | struct extent_status *es); |
d100eef2 ZL |
96 | extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk, |
97 | struct extent_status *es); | |
654598be | 98 | |
624d0f1d JK |
99 | static inline unsigned int ext4_es_status(struct extent_status *es) |
100 | { | |
101 | return es->es_pblk >> ES_SHIFT; | |
102 | } | |
103 | ||
2be12de9 JK |
104 | static inline unsigned int ext4_es_type(struct extent_status *es) |
105 | { | |
106 | return (es->es_pblk & ES_TYPE_MASK) >> ES_SHIFT; | |
107 | } | |
108 | ||
fdc0212e ZL |
109 | static inline int ext4_es_is_written(struct extent_status *es) |
110 | { | |
2be12de9 | 111 | return (ext4_es_type(es) & EXTENT_STATUS_WRITTEN) != 0; |
fdc0212e ZL |
112 | } |
113 | ||
114 | static inline int ext4_es_is_unwritten(struct extent_status *es) | |
115 | { | |
2be12de9 | 116 | return (ext4_es_type(es) & EXTENT_STATUS_UNWRITTEN) != 0; |
fdc0212e ZL |
117 | } |
118 | ||
119 | static inline int ext4_es_is_delayed(struct extent_status *es) | |
120 | { | |
2be12de9 | 121 | return (ext4_es_type(es) & EXTENT_STATUS_DELAYED) != 0; |
fdc0212e ZL |
122 | } |
123 | ||
124 | static inline int ext4_es_is_hole(struct extent_status *es) | |
125 | { | |
2be12de9 JK |
126 | return (ext4_es_type(es) & EXTENT_STATUS_HOLE) != 0; |
127 | } | |
128 | ||
129 | static inline void ext4_es_set_referenced(struct extent_status *es) | |
130 | { | |
131 | es->es_pblk |= ((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT; | |
132 | } | |
133 | ||
134 | static inline void ext4_es_clear_referenced(struct extent_status *es) | |
135 | { | |
136 | es->es_pblk &= ~(((ext4_fsblk_t)EXTENT_STATUS_REFERENCED) << ES_SHIFT); | |
137 | } | |
138 | ||
139 | static inline int ext4_es_is_referenced(struct extent_status *es) | |
140 | { | |
141 | return (ext4_es_status(es) & EXTENT_STATUS_REFERENCED) != 0; | |
fdc0212e ZL |
142 | } |
143 | ||
144 | static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) | |
145 | { | |
3be78c73 | 146 | return es->es_pblk & ~ES_MASK; |
fdc0212e ZL |
147 | } |
148 | ||
149 | static inline void ext4_es_store_pblock(struct extent_status *es, | |
150 | ext4_fsblk_t pb) | |
151 | { | |
152 | ext4_fsblk_t block; | |
153 | ||
3be78c73 | 154 | block = (pb & ~ES_MASK) | (es->es_pblk & ES_MASK); |
fdc0212e ZL |
155 | es->es_pblk = block; |
156 | } | |
157 | ||
158 | static inline void ext4_es_store_status(struct extent_status *es, | |
3be78c73 | 159 | unsigned int status) |
fdc0212e | 160 | { |
624d0f1d JK |
161 | es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | |
162 | (es->es_pblk & ~ES_MASK); | |
fdc0212e ZL |
163 | } |
164 | ||
9a6633b1 TT |
165 | static inline void ext4_es_store_pblock_status(struct extent_status *es, |
166 | ext4_fsblk_t pb, | |
167 | unsigned int status) | |
168 | { | |
624d0f1d JK |
169 | es->es_pblk = (((ext4_fsblk_t)status << ES_SHIFT) & ES_MASK) | |
170 | (pb & ~ES_MASK); | |
9a6633b1 TT |
171 | } |
172 | ||
eb68d0e2 | 173 | extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi); |
d3922a77 | 174 | extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi); |
74cd15cd | 175 | |
ebd173be TT |
176 | extern int ext4_seq_es_shrinker_info_show(struct seq_file *seq, void *v); |
177 | ||
c0677e6d | 178 | #endif /* _EXT4_EXTENTS_STATUS_H */ |