meta_io.c File Reference

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/writeback.h>
#include <linux/swap.h>
#include <linux/delay.h>
#include <linux/bio.h>
#include <linux/gfs2_ondisk.h>
#include "gfs2.h"
#include "incore.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "log.h"
#include "lops.h"
#include "meta_io.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
#include "trace_gfs2.h"

Go to the source code of this file.

Functions
void	gfs2_meta_sync (struct gfs2_glock *gl)
struct buffer_head *	gfs2_getbuf (struct gfs2_glock *gl, u64 blkno, int create)
struct buffer_head *	gfs2_meta_new (struct gfs2_glock *gl, u64 blkno)
int	gfs2_meta_read (struct gfs2_glock *gl, u64 blkno, int flags, struct buffer_head **bhp)
int	gfs2_meta_wait (struct gfs2_sbd *sdp, struct buffer_head *bh)
void	gfs2_attach_bufdata (struct gfs2_glock *gl, struct buffer_head *bh, int meta)
void	gfs2_remove_from_journal (struct buffer_head *bh, struct gfs2_trans *tr, int meta)
void	gfs2_meta_wipe (struct gfs2_inode *ip, u64 bstart, u32 blen)
int	gfs2_meta_indirect_buffer (struct gfs2_inode *ip, int height, u64 num, struct buffer_head **bhp)
struct buffer_head *	gfs2_meta_ra (struct gfs2_glock *gl, u64 dblock, u32 extlen)

Variables
struct address_space_operations	gfs2_meta_aops

Function Documentation

void gfs2_attach_bufdata	(	struct gfs2_glock *	gl,
		struct buffer_head *	bh,
		int	meta
	)

gfs2_attach_bufdata - attach a struct gfs2_bufdata structure to a buffer : the glock the buffer belongs to : The buffer to be attached to : Flag to indicate whether its metadata or not

Definition at line 281 of file meta_io.c.

struct buffer_head* gfs2_getbuf ( struct gfs2_glock *  gl, u64  blkno, int  create  )

read

gfs2_getbuf - Get a buffer with a given address space : the glock : the block number (filesystem scope) : 1 if the buffer should be created

Returns: the buffer

Definition at line 127 of file meta_io.c.

int gfs2_meta_indirect_buffer	(	struct gfs2_inode *	ip,
		int	height,
		u64	num,
		struct buffer_head **	bhp
	)

gfs2_meta_indirect_buffer - Get a metadata buffer : The GFS2 inode : The level of this buf in the metadata (indir addr) tree (if any) : The block number (device relative) of the buffer : the buffer is returned here

Returns: errno

Definition at line 385 of file meta_io.c.

struct buffer_head* gfs2_meta_new ( struct gfs2_glock *  gl, u64  blkno  )

read

gfs2_meta_new - Get a block : The glock associated with this block : The block number

Returns: The buffer

Definition at line 192 of file meta_io.c.

struct buffer_head* gfs2_meta_ra ( struct gfs2_glock *  gl, u64  dblock, u32  extlen  )

read

gfs2_meta_ra - start readahead on an extent of a file : the glock the blocks belong to : the starting disk block : the number of blocks in the extent

returns: the first buffer in the extent

Definition at line 412 of file meta_io.c.

int gfs2_meta_read	(	struct gfs2_glock *	gl,
		u64	blkno,
		int	flags,
		struct buffer_head **	bhp
	)

gfs2_meta_read - Read a block from disk : The glock covering the block : The block number : flags : the place where the buffer is returned (NULL on failure)

Returns: errno

Definition at line 210 of file meta_io.c.

void gfs2_meta_sync

(

struct gfs2_glock *

gl

)

gfs2_meta_sync - Sync all buffers associated with a glock : The glock

Definition at line 106 of file meta_io.c.

int gfs2_meta_wait	(	struct gfs2_sbd *	sdp,
		struct buffer_head *	bh
	)

gfs2_meta_wait - Reread a block from disk : the filesystem : The block to wait for

Returns: errno

Definition at line 255 of file meta_io.c.

void gfs2_meta_wipe	(	struct gfs2_inode *	ip,
		u64	bstart,
		u32	blen
	)

gfs2_meta_wipe - make inode's buffers so they aren't dirty/pinned anymore : the inode who owns the buffers : the first buffer in the run : the number of buffers in the run

Definition at line 354 of file meta_io.c.

void gfs2_remove_from_journal	(	struct buffer_head *	bh,
		struct gfs2_trans *	tr,
		int	meta
	)

Definition at line 309 of file meta_io.c.

Variable Documentation

struct address_space_operations gfs2_meta_aops

Initial value:

= {
    .writepage = gfs2_aspace_writepage,
    .releasepage = gfs2_releasepage,
}

Definition at line 95 of file meta_io.c.