ext4_extents.h File Reference

#include "ext4.h"

Go to the source code of this file.

Data Structures
struct	ext4_extent_tail
struct	ext4_extent
struct	ext4_extent_idx
struct	ext4_extent_header
struct	ext4_ext_path

Macros
#define	AGGRESSIVE_TEST_
#define	EXTENTS_STATS__
#define	CHECK_BINSEARCH__
#define	EXT_DEBUG__
#define	ext_debug(fmt,...)   no_printk(fmt, ##__VA_ARGS__)
#define	EXT_STATS_
#define	EXT4_EXT_MAGIC   cpu_to_le16(0xf30a)
#define	EXT4_EXTENT_TAIL_OFFSET(hdr)
#define	EXT_CONTINUE   0
#define	EXT_BREAK   1
#define	EXT_REPEAT   2
#define	EXT_MAX_BLOCKS   0xffffffff
#define	EXT_INIT_MAX_LEN   (1UL << 15)
#define	EXT_UNINIT_MAX_LEN   (EXT_INIT_MAX_LEN - 1)
#define	EXT_FIRST_EXTENT(__hdr__)
#define	EXT_FIRST_INDEX(__hdr__)
#define	EXT_HAS_FREE_INDEX(__path__)
#define	EXT_LAST_EXTENT(__hdr__)   (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
#define	EXT_LAST_INDEX(__hdr__)   (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)
#define	EXT_MAX_EXTENT(__hdr__)   (EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)
#define	EXT_MAX_INDEX(__hdr__)   (EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)

Typedefs
typedef int(*	ext_prepare_callback )(struct inode *, ext4_lblk_t, struct ext4_ext_cache *, struct ext4_extent *, void *)

Functions
int	ext4_ext_calc_metadata_amount (struct inode *inode, ext4_lblk_t lblocks)
int	ext4_extent_tree_init (handle_t *, struct inode *)
int	ext4_ext_calc_credits_for_single_extent (struct inode *inode, int num, struct ext4_ext_path *path)
int	ext4_can_extents_be_merged (struct inode *inode, struct ext4_extent *ex1, struct ext4_extent *ex2)
int	ext4_ext_insert_extent (handle_t *, struct inode *, struct ext4_ext_path *, struct ext4_extent *, int)
struct ext4_ext_path *	ext4_ext_find_extent (struct inode *, ext4_lblk_t, struct ext4_ext_path *)
void	ext4_ext_drop_refs (struct ext4_ext_path *)
int	ext4_ext_check_inode (struct inode *inode)
int	ext4_find_delalloc_cluster (struct inode *inode, ext4_lblk_t lblk, int search_hint_reverse)

Macro Definition Documentation

#define AGGRESSIVE_TEST_

Definition at line 30 of file ext4_extents.h.

#define CHECK_BINSEARCH__

Definition at line 43 of file ext4_extents.h.

#define EXT4_EXT_MAGIC   cpu_to_le16(0xf30a)

Definition at line 115 of file ext4_extents.h.

#define EXT4_EXTENT_TAIL_OFFSET

(

hdr

)

Value:

(sizeof(struct ext4_extent_header) + \
     (sizeof(struct ext4_extent) * le16_to_cpu((hdr)->eh_max)))

Definition at line 117 of file ext4_extents.h.

#define EXT_BREAK   1

Definition at line 157 of file ext4_extents.h.

#define EXT_CONTINUE   0

Definition at line 156 of file ext4_extents.h.

#define ext_debug	(		fmt,
			...
	)		no_printk(fmt, ##__VA_ARGS__)

Definition at line 52 of file ext4_extents.h.

#define EXT_DEBUG__

Definition at line 48 of file ext4_extents.h.

#define EXT_FIRST_EXTENT

(

__hdr__

)

Value:

((struct ext4_extent *) (((char *) (__hdr__)) +     \
                 sizeof(struct ext4_extent_header)))

Definition at line 187 of file ext4_extents.h.

#define EXT_FIRST_INDEX

(

__hdr__

)

Value:

((struct ext4_extent_idx *) (((char *) (__hdr__)) + \
                     sizeof(struct ext4_extent_header)))

Definition at line 190 of file ext4_extents.h.

#define EXT_HAS_FREE_INDEX

(

__path__

)

Value:

(le16_to_cpu((__path__)->p_hdr->eh_entries) \
                     < le16_to_cpu((__path__)->p_hdr->eh_max))

Definition at line 193 of file ext4_extents.h.

#define EXT_INIT_MAX_LEN   (1UL << 15)

Definition at line 183 of file ext4_extents.h.

#define EXT_LAST_EXTENT

(

__hdr__

)

(EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)

Definition at line 196 of file ext4_extents.h.

#define EXT_LAST_INDEX

(

__hdr__

)

(EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_entries) - 1)

Definition at line 198 of file ext4_extents.h.

#define EXT_MAX_BLOCKS   0xffffffff

Definition at line 164 of file ext4_extents.h.

#define EXT_MAX_EXTENT

(

__hdr__

)

(EXT_FIRST_EXTENT((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)

Definition at line 200 of file ext4_extents.h.

#define EXT_MAX_INDEX

(

__hdr__

)

(EXT_FIRST_INDEX((__hdr__)) + le16_to_cpu((__hdr__)->eh_max) - 1)

Definition at line 202 of file ext4_extents.h.

#define EXT_REPEAT   2

Definition at line 158 of file ext4_extents.h.

#define EXT_STATS_

Definition at line 59 of file ext4_extents.h.

#define EXT_UNINIT_MAX_LEN   (EXT_INIT_MAX_LEN - 1)

Definition at line 184 of file ext4_extents.h.

#define EXTENTS_STATS__

Definition at line 37 of file ext4_extents.h.

Typedef Documentation

typedef int(* ext_prepare_callback)(struct inode *, ext4_lblk_t, struct ext4_ext_cache *, struct ext4_extent *, void *)

Definition at line 152 of file ext4_extents.h.

Function Documentation

int ext4_can_extents_be_merged	(	struct inode *	inode,
		struct ext4_extent *	ex1,
		struct ext4_extent *	ex2
	)

Definition at line 1573 of file extents.c.

int ext4_ext_calc_credits_for_single_extent	(	struct inode *	inode,
		int	num,
		struct ext4_ext_path *	path
	)

Definition at line 2233 of file extents.c.

int ext4_ext_calc_metadata_amount	(	struct inode *	inode,
		ext4_lblk_t	lblocks
	)

Definition at line 294 of file extents.c.

int ext4_ext_check_inode

(

struct inode *

inode

)

Definition at line 459 of file extents.c.

void ext4_ext_drop_refs

(

struct ext4_ext_path *

)

Definition at line 567 of file extents.c.

struct ext4_ext_path* ext4_ext_find_extent ( struct inode *  , ext4_lblk_t  , struct ext4_ext_path *    )

read

Definition at line 716 of file extents.c.

int ext4_ext_insert_extent	(	handle_t *	,
		struct inode *	,
		struct ext4_ext_path *	,
		struct ext4_extent *	,
		int
	)

Definition at line 1787 of file extents.c.

int ext4_extent_tree_init	(	handle_t *	,
		struct inode *
	)

int ext4_find_delalloc_cluster	(	struct inode *	inode,
		ext4_lblk_t	lblk,
		int	search_hint_reverse
	)

Definition at line 3562 of file extents.c.