be401363ac
This commit renames ext4_es_find_extent with ext4_es_find_delayed_extent and improve this function. First, we split input and output parameter. Second, this function never return the first block of the next delayed extent after 'es'. Signed-off-by: Zheng Liu <wenqing.lz@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Jan kara <jack@suse.cz>
108 lines
2.8 KiB
C
108 lines
2.8 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
|
|
|
|
#define EXTENT_STATUS_WRITTEN 0x80000000 /* written extent */
|
|
#define EXTENT_STATUS_UNWRITTEN 0x40000000 /* unwritten extent */
|
|
#define EXTENT_STATUS_DELAYED 0x20000000 /* delayed extent */
|
|
#define EXTENT_STATUS_HOLE 0x10000000 /* hole */
|
|
|
|
#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \
|
|
EXTENT_STATUS_UNWRITTEN | \
|
|
EXTENT_STATUS_DELAYED | \
|
|
EXTENT_STATUS_HOLE)
|
|
|
|
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 long long 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(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 & EXTENT_STATUS_WRITTEN);
|
|
}
|
|
|
|
static inline int ext4_es_is_unwritten(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_UNWRITTEN);
|
|
}
|
|
|
|
static inline int ext4_es_is_delayed(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_DELAYED);
|
|
}
|
|
|
|
static inline int ext4_es_is_hole(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_HOLE);
|
|
}
|
|
|
|
static inline ext4_fsblk_t ext4_es_status(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & EXTENT_STATUS_FLAGS);
|
|
}
|
|
|
|
static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es)
|
|
{
|
|
return (es->es_pblk & ~EXTENT_STATUS_FLAGS);
|
|
}
|
|
|
|
static inline void ext4_es_store_pblock(struct extent_status *es,
|
|
ext4_fsblk_t pb)
|
|
{
|
|
ext4_fsblk_t block;
|
|
|
|
block = (pb & ~EXTENT_STATUS_FLAGS) |
|
|
(es->es_pblk & EXTENT_STATUS_FLAGS);
|
|
es->es_pblk = block;
|
|
}
|
|
|
|
static inline void ext4_es_store_status(struct extent_status *es,
|
|
unsigned long long status)
|
|
{
|
|
ext4_fsblk_t block;
|
|
|
|
block = (status & EXTENT_STATUS_FLAGS) |
|
|
(es->es_pblk & ~EXTENT_STATUS_FLAGS);
|
|
es->es_pblk = block;
|
|
}
|
|
|
|
#endif /* _EXT4_EXTENTS_STATUS_H */
|