fs/ext4/extents_status.h

   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 */