projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| c0677e6d ZL |
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 | ||
| 654598be ZL |
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 | ||
| c0677e6d ZL |
23 | struct extent_status { |
| 24 | struct rb_node rb_node; | |
| 06b0c886 ZL |
25 | ext4_lblk_t es_lblk; /* first logical block extent covers */ |
| 26 | ext4_lblk_t es_len; /* length of extent in block */ | |
| c0677e6d ZL |
27 | }; |
| 28 | ||
| 29 | struct ext4_es_tree { | |
| 30 | struct rb_root root; | |
| 31 | struct extent_status *cache_es; /* recently accessed extent */ | |
| 32 | }; | |
| 33 | ||
| 654598be ZL |
34 | extern int __init ext4_init_es(void); |
| 35 | extern void ext4_exit_es(void); | |
| 36 | extern void ext4_es_init_tree(struct ext4_es_tree *tree); | |
| 37 | ||
| 06b0c886 | 38 | extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, |
| 654598be | 39 | ext4_lblk_t len); |
| 06b0c886 | 40 | extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, |
| 654598be ZL |
41 | ext4_lblk_t len); |
| 42 | extern ext4_lblk_t ext4_es_find_extent(struct inode *inode, | |
| 43 | struct extent_status *es); | |
| 44 | ||
| c0677e6d | 45 | #endif /* _EXT4_EXTENTS_STATUS_H */ |