rgrp.h File Reference

#include <linux/slab.h>
#include <linux/uaccess.h>

Go to the source code of this file.

Data Structures
struct	gfs2_rgrp_list

Macros
#define	RGRP_RSRV_MINBYTES   8
#define	RGRP_RSRV_MINBLKS   ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))

Functions
void	gfs2_rgrp_verify (struct gfs2_rgrpd *rgd)
struct gfs2_rgrpd *	gfs2_blk2rgrpd (struct gfs2_sbd *sdp, u64 blk, bool exact)
struct gfs2_rgrpd *	gfs2_rgrpd_get_first (struct gfs2_sbd *sdp)
struct gfs2_rgrpd *	gfs2_rgrpd_get_next (struct gfs2_rgrpd *rgd)
void	gfs2_clear_rgrpd (struct gfs2_sbd *sdp)
int	gfs2_rindex_update (struct gfs2_sbd *sdp)
void	gfs2_free_clones (struct gfs2_rgrpd *rgd)
int	gfs2_rgrp_go_lock (struct gfs2_holder *gh)
void	gfs2_rgrp_go_unlock (struct gfs2_holder *gh)
struct gfs2_alloc *	gfs2_alloc_get (struct gfs2_inode *ip)
int	gfs2_inplace_reserve (struct gfs2_inode *ip, u32 requested)
void	gfs2_inplace_release (struct gfs2_inode *ip)
int	gfs2_alloc_blocks (struct gfs2_inode *ip, u64 *bn, unsigned int *n, bool dinode, u64 *generation)
int	gfs2_rs_alloc (struct gfs2_inode *ip)
void	gfs2_rs_deltree (struct gfs2_inode *ip, struct gfs2_blkreserv *rs)
void	gfs2_rs_delete (struct gfs2_inode *ip)
void	__gfs2_free_blocks (struct gfs2_inode *ip, u64 bstart, u32 blen, int meta)
void	gfs2_free_meta (struct gfs2_inode *ip, u64 bstart, u32 blen)
void	gfs2_free_di (struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
void	gfs2_unlink_di (struct inode *inode)
int	gfs2_check_blk_type (struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
void	gfs2_rlist_add (struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, u64 block)
void	gfs2_rlist_alloc (struct gfs2_rgrp_list *rlist, unsigned int state)
void	gfs2_rlist_free (struct gfs2_rgrp_list *rlist)
u64	gfs2_ri_total (struct gfs2_sbd *sdp)
int	gfs2_rgrp_dump (struct seq_file *seq, const struct gfs2_glock *gl)
int	gfs2_rgrp_send_discards (struct gfs2_sbd *sdp, u64 offset, struct buffer_head *bh, const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed)
int	gfs2_fitrim (struct file *filp, void __user *argp)

Macro Definition Documentation

#define RGRP_RSRV_MINBLKS   ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))

Definition at line 22 of file rgrp.h.

#define RGRP_RSRV_MINBYTES   8

Definition at line 21 of file rgrp.h.

Function Documentation

void __gfs2_free_blocks	(	struct gfs2_inode *	ip,
		u64	bstart,
		u32	blen,
		int	meta
	)

__gfs2_free_blocks - free a contiguous run of block(s) : the inode these blocks are being freed from : first block of a run of contiguous blocks : the length of the block run : 1 if the blocks represent metadata

Definition at line 2103 of file rgrp.c.

int gfs2_alloc_blocks	(	struct gfs2_inode *	ip,
		u64 *	bn,
		unsigned int *	nblocks,
		bool	dinode,
		u64 *	generation
	)

gfs2_alloc_blocks - Allocate one or more blocks of data and/or a dinode : the inode to allocate the block for : Used to return the starting block number : requested number of blocks/extent length (value/result) : 1 if we're allocating a dinode block, else 0 : the generation number of the inode

Returns: 0 or error

Definition at line 1999 of file rgrp.c.

struct gfs2_alloc* gfs2_alloc_get ( struct gfs2_inode *  ip )

read

struct gfs2_rgrpd* gfs2_blk2rgrpd ( struct gfs2_sbd *  sdp, u64  blk, bool  exact  )

read

gfs2_blk2rgrpd - Find resource group for a given data/meta block number : The GFS2 superblock : The data block number : True if this needs to be an exact match

Returns: The resource group, or NULL if not found

Definition at line 462 of file rgrp.c.

int gfs2_check_blk_type	(	struct gfs2_sbd *	sdp,
		u64	no_addr,
		unsigned int	type
	)

gfs2_check_blk_type - Check the type of a block : The superblock : The block number to check : The block type we are looking for

Returns: 0 if the block type matches the expected type -ESTALE if it doesn't match or -ve errno if something went wrong while checking

Definition at line 2200 of file rgrp.c.

void gfs2_clear_rgrpd

(

struct gfs2_sbd *

sdp

)

Definition at line 666 of file rgrp.c.

int gfs2_fitrim	(	struct file *	filp,
		void __user *	argp
	)

gfs2_fitrim - Generate discard requests for unused bits of the filesystem : Any file on the filesystem : Pointer to the arguments (also used to pass result)

Returns: 0 on success, otherwise error code

Definition at line 1252 of file rgrp.c.

void gfs2_free_clones

(

struct gfs2_rgrpd *

rgd

)

Definition at line 539 of file rgrp.c.

void gfs2_free_di	(	struct gfs2_rgrpd *	rgd,
		struct gfs2_inode *	ip
	)

Definition at line 2181 of file rgrp.c.

void gfs2_free_meta	(	struct gfs2_inode *	ip,
		u64	bstart,
		u32	blen
	)

gfs2_free_meta - free a contiguous run of data block(s) : the inode these blocks are being freed from : first block of a run of contiguous blocks : the length of the block run

Definition at line 2131 of file rgrp.c.

void gfs2_inplace_release

(

struct gfs2_inode *

ip

)

gfs2_inplace_release - release an inplace reservation : the inode the reservation was taken out on

Release a reservation made by gfs2_inplace_reserve().

Definition at line 1812 of file rgrp.c.

int gfs2_inplace_reserve	(	struct gfs2_inode *	ip,
		u32	requested
	)

gfs2_inplace_reserve - Reserve space in the filesystem : the inode to reserve space for : the number of blocks to be reserved

Returns: errno

Definition at line 1702 of file rgrp.c.

int gfs2_rgrp_dump	(	struct seq_file *	seq,
		const struct gfs2_glock *	gl
	)

gfs2_rgrp_dump - print out an rgrp : The iterator : The glock in question

Definition at line 1919 of file rgrp.c.

int gfs2_rgrp_go_lock

(

struct gfs2_holder *

gh

)

Definition at line 1142 of file rgrp.c.

void gfs2_rgrp_go_unlock

(

struct gfs2_holder *

gh

)

gfs2_rgrp_go_unlock - Release RG bitmaps read in with gfs2_rgrp_bh_get() : The glock holder for the resource group

Definition at line 1158 of file rgrp.c.

int gfs2_rgrp_send_discards	(	struct gfs2_sbd *	sdp,
		u64	offset,
		struct buffer_head *	bh,
		const struct gfs2_bitmap *	bi,
		unsigned	minlen,
		u64 *	ptrimmed
	)

Definition at line 1173 of file rgrp.c.

void gfs2_rgrp_verify

(

struct gfs2_rgrpd *

rgd

)

gfs2_rgrp_verify - Verify that a resource group is consistent : the rgrp

Definition at line 403 of file rgrp.c.

struct gfs2_rgrpd* gfs2_rgrpd_get_first ( struct gfs2_sbd *  sdp )

read

gfs2_rgrpd_get_first - get the first Resource Group in the filesystem : The GFS2 superblock

Returns: The first rgrp in the filesystem

Definition at line 500 of file rgrp.c.

struct gfs2_rgrpd* gfs2_rgrpd_get_next ( struct gfs2_rgrpd *  rgd )

read

gfs2_rgrpd_get_next - get the next RG : the resource group descriptor

Returns: The next rgrp

Definition at line 520 of file rgrp.c.

u64 gfs2_ri_total

(

struct gfs2_sbd *

sdp

)

gfs2_ri_total - Total up the file system space, according to the rindex. : the filesystem

Definition at line 784 of file rgrp.c.

int gfs2_rindex_update

(

struct gfs2_sbd *

sdp

)

gfs2_rindex_update - Update the rindex if required : The GFS2 superblock

We grab a lock on the rindex inode to make sure that it doesn't change whilst we are performing an operation. We keep this lock for quite long periods of time compared to other locks. This doesn't matter, since it is shared and it is very, very rarely accessed in the exclusive mode (i.e. only when expanding the filesystem).

This makes sure that we're using the latest copy of the resource index special file, which might have been updated if someone expanded the filesystem (via gfs2_grow utility), which adds new resource groups.

Returns: 0 on succeess, error code otherwise

Definition at line 937 of file rgrp.c.

void gfs2_rlist_add	(	struct gfs2_inode *	ip,
		struct gfs2_rgrp_list *	rlist,
		u64	block
	)

gfs2_rlist_add - add a RG to a list of RGs : the inode : the list of resource groups : the block

Figure out what RG a block belongs to and add that RG to the list

FIXME: Don't use NOFAIL

Definition at line 2234 of file rgrp.c.

void gfs2_rlist_alloc	(	struct gfs2_rgrp_list *	rlist,
		unsigned int	state
	)

gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate and initialize an array of glock holders for them : the list of resource groups : the lock state to acquire the RG lock in

FIXME: Don't use NOFAIL

Definition at line 2289 of file rgrp.c.

void gfs2_rlist_free

(

struct gfs2_rgrp_list *

rlist

)

gfs2_rlist_free - free a resource group list : the list of resource groups

Definition at line 2307 of file rgrp.c.

int gfs2_rs_alloc

(

struct gfs2_inode *

ip

)

gfs2_rs_alloc - make sure we have a reservation assigned to the inode : the inode for this reservation

Definition at line 554 of file rgrp.c.

void gfs2_rs_delete

(

struct gfs2_inode *

ip

)

gfs2_rs_delete - delete a multi-block reservation : The inode for this reservation

Definition at line 633 of file rgrp.c.

void gfs2_rs_deltree	(	struct gfs2_inode *	ip,
		struct gfs2_blkreserv *	rs
	)

gfs2_rs_deltree - remove a multi-block reservation from the rgd tree : The reservation to remove

Definition at line 616 of file rgrp.c.

void gfs2_unlink_di

(

struct inode *

inode

)

Definition at line 2140 of file rgrp.c.