mirror of
https://github.com/torvalds/linux.git
synced 2024-12-15 15:41:58 +00:00
d7b2a00c2e
After applied the commit (4a092d73), we have reduced the number of
source files that need to #include ext4_extents.h. But we can do
better.
This commit defines ext4_zeroout_es() in extents.c and move
EXT_MAX_BLOCKS into ext4.h in order not to include ext4_extents.h in
indirect.c and ioctl.c. Meanwhile we just need to include this file in
extent_status.c when ES_AGGRESSIVE_TEST is defined. Otherwise, this
commit removes a duplicated declaration in trace/events/ext4.h.
After applied this patch, we just need to include ext4_extents.h file
in {super,migrate,move_extents,extents}.c, and it is easy for us to
define a new extent disk layout.
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
138 lines
3.6 KiB
C
138 lines
3.6 KiB
C
/*
|
|
* fs/ext4/extents_status.h
|
|
*
|
|
* Written by Yongqiang Yang <xiaoqiangnk@gmail.com>
|
|
* Modified by
|
|
* Allison Henderson <achender@linux.vnet.ibm.com>
|
|
* Zheng Liu <wenqing.lz@taobao.com>
|
|
*
|
|
*/
|
|
|
|
#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
|
|
|
|
/*
|
|
* With ES_AGGRESSIVE_TEST defined, the result of es caching will be
|
|
* checked with old map_block's result.
|
|
*/
|
|
#define ES_AGGRESSIVE_TEST__
|
|
|
|
/*
|
|
* These flags live in the high bits of extent_status.es_pblk
|
|
*/
|
|
#define ES_SHIFT 60
|
|
|
|
#define EXTENT_STATUS_WRITTEN (1 << 3)
|
|
#define EXTENT_STATUS_UNWRITTEN (1 << 2)
|
|
#define EXTENT_STATUS_DELAYED (1 << 1)
|
|
#define EXTENT_STATUS_HOLE (1 << 0)
|
|
|
|
#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \
|
|
EXTENT_STATUS_UNWRITTEN | \
|
|
EXTENT_STATUS_DELAYED | \
|
|
EXTENT_STATUS_HOLE)
|
|
|
|
#define ES_WRITTEN (1ULL << 63)
|
|
#define ES_UNWRITTEN (1ULL << 62)
|
|
#define ES_DELAYED (1ULL << 61)
|
|
#define ES_HOLE (1ULL << 60)
|
|
|
|
#define ES_MASK (ES_WRITTEN | ES_UNWRITTEN | \
|
|
ES_DELAYED | ES_HOLE)
|
|
|
|
struct ext4_sb_info;
|
|
struct ext4_extent;
|
|
|
|
struct extent_status {
|
|
struct rb_node rb_node;
|
|
ext4_lblk_t es_lblk; /* first logical block extent covers */
|
|
ext4_lblk_t es_len; /* length of extent in block */
|
|
ext4_fsblk_t es_pblk; /* first physical block */
|
|
};
|
|
|
|
struct ext4_es_tree {
|
|
struct rb_root root;
|
|
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 lblk,
|
|
ext4_lblk_t len, ext4_fsblk_t pblk,
|
|
unsigned int status);
|
|
extern void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk,
|
|
ext4_lblk_t len, ext4_fsblk_t pblk,
|
|
unsigned int status);
|
|
extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
|
|
ext4_lblk_t len);
|
|
extern void ext4_es_find_delayed_extent_range(struct inode *inode,
|
|
ext4_lblk_t lblk, ext4_lblk_t end,
|
|
struct extent_status *es);
|
|
extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
|
|
struct extent_status *es);
|
|
|
|
static inline int ext4_es_is_written(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ES_WRITTEN) != 0;
|
|
}
|
|
|
|
static inline int ext4_es_is_unwritten(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ES_UNWRITTEN) != 0;
|
|
}
|
|
|
|
static inline int ext4_es_is_delayed(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ES_DELAYED) != 0;
|
|
}
|
|
|
|
static inline int ext4_es_is_hole(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ES_HOLE) != 0;
|
|
}
|
|
|
|
static inline unsigned int ext4_es_status(struct extent_status *es)
|
|
{
|
|
return es->es_pblk >> ES_SHIFT;
|
|
}
|
|
|
|
static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
|
|
{
|
|
return es->es_pblk & ~ES_MASK;
|
|
}
|
|
|
|
static inline void ext4_es_store_pblock(struct extent_status *es,
|
|
ext4_fsblk_t pb)
|
|
{
|
|
ext4_fsblk_t block;
|
|
|
|
block = (pb & ~ES_MASK) | (es->es_pblk & ES_MASK);
|
|
es->es_pblk = block;
|
|
}
|
|
|
|
static inline void ext4_es_store_status(struct extent_status *es,
|
|
unsigned int status)
|
|
{
|
|
es->es_pblk = (((ext4_fsblk_t)
|
|
(status & EXTENT_STATUS_FLAGS) << ES_SHIFT) |
|
|
(es->es_pblk & ~ES_MASK));
|
|
}
|
|
|
|
extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
|
|
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
|
|
extern void ext4_es_lru_add(struct inode *inode);
|
|
extern void ext4_es_lru_del(struct inode *inode);
|
|
|
|
#endif /* _EXT4_EXTENTS_STATUS_H */
|