mballoc.c File Reference

#include "ext4_jbd2.h"
#include "mballoc.h"
#include <linux/debugfs.h>
#include <linux/log2.h>
#include <linux/slab.h>
#include <trace/events/ext4.h>

Go to the source code of this file.

Macros
#define	NR_GRPINFO_CACHES   8
#define	mb_check_buddy(e4b)
#define	NRL_CHECK_SIZE(req, size, max, chunk_size)   (req <= (size) || max <= (chunk_size))

Functions
void	ext4_set_bits (void *bm, int cur, int len)
int	ext4_mb_alloc_groupinfo (struct super_block *sb, ext4_group_t ngroups)
int	ext4_mb_add_groupinfo (struct super_block *sb, ext4_group_t group, struct ext4_group_desc *desc)
int	ext4_mb_init (struct super_block *sb)
int	ext4_mb_release (struct super_block *sb)
int __init	ext4_init_mballoc (void)
void	ext4_exit_mballoc (void)
void	ext4_discard_preallocations (struct inode *inode)
ext4_fsblk_t	ext4_mb_new_blocks (handle_t *handle, struct ext4_allocation_request *ar, int *errp)
void	ext4_free_blocks (handle_t *handle, struct inode *inode, struct buffer_head *bh, ext4_fsblk_t block, unsigned long count, int flags)
int	ext4_group_add_blocks (handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count)
int	ext4_trim_fs (struct super_block *sb, struct fstrim_range *range)

Macro Definition Documentation

#define mb_check_buddy

(

e4b

)

Definition at line 641 of file mballoc.c.

#define NR_GRPINFO_CACHES   8

Definition at line 349 of file mballoc.c.

#define NRL_CHECK_SIZE	(		req,
			size,
			max,
			chunk_size
	)		(req <= (size) || max <= (chunk_size))

Function Documentation

void ext4_discard_preallocations

(

struct inode *

inode

)

Definition at line 3759 of file mballoc.c.

void ext4_exit_mballoc

(

void

)

Definition at line 2710 of file mballoc.c.

void ext4_free_blocks	(	handle_t *	handle,
		struct inode *	inode,
		struct buffer_head *	bh,
		ext4_fsblk_t	block,
		unsigned long	count,
		int	flags
	)

ext4_free_blocks() – Free given blocks and update quota : handle for this transaction : inode : start physical block to free : number of blocks to count : flags used by ext4_free_blocks

Definition at line 4474 of file mballoc.c.

int ext4_group_add_blocks	(	handle_t *	handle,
		struct super_block *	sb,
		ext4_fsblk_t	block,
		unsigned long	count
	)

ext4_group_add_blocks() – Add given blocks to an existing group : handle to this transaction : super block : start physical block to add to the block group : number of blocks to free

This marks the blocks as free in the bitmap and buddy.

Definition at line 4717 of file mballoc.c.

int __init ext4_init_mballoc

(

void

)

Definition at line 2685 of file mballoc.c.

int ext4_mb_add_groupinfo	(	struct super_block *	sb,
		ext4_group_t	group,
		struct ext4_group_desc *	desc
	)

Definition at line 2204 of file mballoc.c.

int ext4_mb_alloc_groupinfo	(	struct super_block *	sb,
		ext4_group_t	ngroups
	)

Definition at line 2174 of file mballoc.c.

int ext4_mb_init

(

struct super_block *

sb

)

Definition at line 2385 of file mballoc.c.

ext4_fsblk_t ext4_mb_new_blocks	(	handle_t *	handle,
		struct ext4_allocation_request *	ar,
		int *	errp
	)

Definition at line 4230 of file mballoc.c.

int ext4_mb_release

(

struct super_block *

sb

)

Definition at line 2518 of file mballoc.c.

void ext4_set_bits	(	void *	bm,
		int	cur,
		int	len
	)

Definition at line 1240 of file mballoc.c.

int ext4_trim_fs	(	struct super_block *	sb,
		struct fstrim_range *	range
	)

ext4_trim_fs() – trim ioctl handle function : superblock for filesystem : fstrim_range structure

start: First Byte to trim len: number of Bytes to trim from start minlen: minimum extent length in Bytes ext4_trim_fs goes through all allocation groups containing Bytes from start to start+len. For each such a group ext4_trim_all_free function is invoked to trim all free space.

Definition at line 4977 of file mballoc.c.