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| author | Zheng Liu <wenqing.lz@taobao.com> | 2012-11-09 03:57:20 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-11-09 03:57:20 +0100 |
| commit | 654598bef3731c9ae9b068ac35e6b69674c02841 (patch) | |
| tree | 24e0f7c13aca6426b8982da2768c6a1787a2d6be /fs/ext4/extents_status.h | |
| parent | ext4: add data structures for the extent status tree (diff) | |
| download | linux-654598bef3731c9ae9b068ac35e6b69674c02841.tar.xz linux-654598bef3731c9ae9b068ac35e6b69674c02841.zip | |
ext4: add operations on extent status tree
This patch adds operations on a extent status tree.
CC: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/extents_status.h')
| -rw-r--r-- | fs/ext4/extents_status.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index 8be2ab9c9425..077f82db092a 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -11,6 +11,15 @@ #ifndef _EXT4_EXTENTS_STATUS_H #define _EXT4_EXTENTS_STATUS_H +/* + * Turn on ES_DEBUG__ to get lots of info about extent status operations. + */ +#ifdef ES_DEBUG__ +#define es_debug(fmt, ...) printk(fmt, ##__VA_ARGS__) +#else +#define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + struct extent_status { struct rb_node rb_node; ext4_lblk_t start; /* first block extent covers */ @@ -22,4 +31,15 @@ struct ext4_es_tree { struct extent_status *cache_es; /* recently accessed extent */ }; +extern int __init ext4_init_es(void); +extern void ext4_exit_es(void); +extern void ext4_es_init_tree(struct ext4_es_tree *tree); + +extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t start, + ext4_lblk_t len); +extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t start, + ext4_lblk_t len); +extern ext4_lblk_t ext4_es_find_extent(struct inode *inode, + struct extent_status *es); + #endif /* _EXT4_EXTENTS_STATUS_H */ |