| 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 | |
| 14 | struct extent_status { |
| 15 | struct rb_node rb_node; |
| 16 | ext4_lblk_t start; /* first block extent covers */ |
| 17 | ext4_lblk_t len; /* length of extent in block */ |
| 18 | }; |
| 19 | |
| 20 | struct ext4_es_tree { |
| 21 | struct rb_root root; |
| 22 | struct extent_status *cache_es; /* recently accessed extent */ |
| 23 | }; |
| 24 | |
| 25 | #endif /* _EXT4_EXTENTS_STATUS_H */ |