linux/fs/gfs2/trans.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.
 */

#define pr_fmt(fmt) …

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/kallsyms.h>
#include <linux/gfs2_ondisk.h>

#include "gfs2.h"
#include "incore.h"
#include "glock.h"
#include "inode.h"
#include "log.h"
#include "lops.h"
#include "meta_io.h"
#include "trans.h"
#include "util.h"
#include "trace_gfs2.h"

static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr)
{ … }

int __gfs2_trans_begin(struct gfs2_trans *tr, struct gfs2_sbd *sdp,
		       unsigned int blocks, unsigned int revokes,
		       unsigned long ip)
{ … }

int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
		     unsigned int revokes)
{ … }

void gfs2_trans_end(struct gfs2_sbd *sdp)
{ … }

static struct gfs2_bufdata *gfs2_alloc_bufdata(struct gfs2_glock *gl,
					       struct buffer_head *bh)
{ … }

/**
 * gfs2_trans_add_data - Add a databuf to the transaction.
 * @gl: The inode glock associated with the buffer
 * @bh: The buffer to add
 *
 * This is used in journaled data mode.
 * We need to journal the data block in the same way as metadata in
 * the functions above. The difference is that here we have a tag
 * which is two __be64's being the block number (as per meta data)
 * and a flag which says whether the data block needs escaping or
 * not. This means we need a new log entry for each 251 or so data
 * blocks, which isn't an enormous overhead but twice as much as
 * for normal metadata blocks.
 */
void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
{ … }

void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
{ … }

void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
{ … }

void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
{ … }

void gfs2_trans_free(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
{ … }