mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-06 05:06:29 +00:00
c65b76b893
GFS2 uses struct gfs2_rbm to represent a filesystem block number as a bit position within a resource group. This representation is used in the bitmap manipulation code to prevent excessive conversions between block numbers and bit positions, but also in struct gfs2_blkreserv which is part of struct gfs2_inode, to mark the start of a reservation. In the inode, the bit position representation makes less sense: first, the start position is used as a block number about as often as a bit position; second, the bit position representation makes the code unnecessarily complicated and difficult to read. Therefore, change struct gfs2_blkreserv to represent the start of a reservation as a block number instead of a bit position. (This requires keeping track of the resource group in gfs2_blkreserv separately.) With that change, various things can be slightly simplified, and struct gfs2_rbm can be moved to rgrp.c. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
|
|
*/
|
|
|
|
#ifndef __TRANS_DOT_H__
|
|
#define __TRANS_DOT_H__
|
|
|
|
#include <linux/buffer_head.h>
|
|
struct gfs2_sbd;
|
|
struct gfs2_rgrpd;
|
|
struct gfs2_glock;
|
|
|
|
#define RES_DINODE 1
|
|
#define RES_INDIRECT 1
|
|
#define RES_JDATA 1
|
|
#define RES_DATA 1
|
|
#define RES_LEAF 1
|
|
#define RES_RG_HDR 1
|
|
#define RES_RG_BIT 2
|
|
#define RES_EATTR 1
|
|
#define RES_STATFS 1
|
|
#define RES_QUOTA 2
|
|
|
|
/* reserve either the number of blocks to be allocated plus the rg header
|
|
* block, or all of the blocks in the rg, whichever is smaller */
|
|
static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip, unsigned requested)
|
|
{
|
|
struct gfs2_rgrpd *rgd = ip->i_res.rs_rgd;
|
|
|
|
if (requested < rgd->rd_length)
|
|
return requested + 1;
|
|
return rgd->rd_length;
|
|
}
|
|
|
|
extern int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
|
|
unsigned int revokes);
|
|
|
|
extern void gfs2_trans_end(struct gfs2_sbd *sdp);
|
|
extern void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh);
|
|
extern void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh);
|
|
extern void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
|
|
extern void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
|
|
extern void gfs2_trans_free(struct gfs2_sbd *sdp, struct gfs2_trans *tr);
|
|
|
|
#endif /* __TRANS_DOT_H__ */
|