mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 00:52:01 +00:00
19ebc050e4
Function gfs2_write_log_header can be used to write a log header into any of
the journals of a filesystem. When used on the node's own journal,
gfs2_write_log_header advances the current position in the log
(sdp->sd_log_flush_head) as a side effect, through function gfs2_log_bmap.
This is confusing, and it also means that we can't use gfs2_log_bmap for other
journals even if they have an extent map. So clean this mess up by not
advancing sdp->sd_log_flush_head in gfs2_write_log_header or gfs2_log_bmap
anymore and making that a responsibility of the callers instead.
This is related to commit 7c70b89695 ("gfs2: clean_journal improperly set
sd_log_flush_head").
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
|
|
*/
|
|
|
|
#ifndef __LOPS_DOT_H__
|
|
#define __LOPS_DOT_H__
|
|
|
|
#include <linux/list.h>
|
|
#include "incore.h"
|
|
|
|
#define BUF_OFFSET \
|
|
((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
|
|
~(sizeof(__be64) - 1))
|
|
#define DATABUF_OFFSET \
|
|
((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
|
|
~(2 * sizeof(__be64) - 1))
|
|
|
|
extern const struct gfs2_log_operations *gfs2_log_ops[];
|
|
extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
|
|
extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
|
|
extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
|
|
unsigned size, unsigned offset, u64 blkno);
|
|
extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
|
|
extern void gfs2_log_submit_bio(struct bio **biop, int opf);
|
|
extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
|
|
extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head, bool keep_cache);
|
|
|
|
static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit;
|
|
|
|
limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
|
|
return limit;
|
|
}
|
|
|
|
static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
|
|
{
|
|
unsigned int limit;
|
|
|
|
limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
|
|
return limit;
|
|
}
|
|
|
|
static inline void lops_before_commit(struct gfs2_sbd *sdp,
|
|
struct gfs2_trans *tr)
|
|
{
|
|
int x;
|
|
for (x = 0; gfs2_log_ops[x]; x++)
|
|
if (gfs2_log_ops[x]->lo_before_commit)
|
|
gfs2_log_ops[x]->lo_before_commit(sdp, tr);
|
|
}
|
|
|
|
static inline void lops_after_commit(struct gfs2_sbd *sdp,
|
|
struct gfs2_trans *tr)
|
|
{
|
|
int x;
|
|
for (x = 0; gfs2_log_ops[x]; x++)
|
|
if (gfs2_log_ops[x]->lo_after_commit)
|
|
gfs2_log_ops[x]->lo_after_commit(sdp, tr);
|
|
}
|
|
|
|
static inline void lops_before_scan(struct gfs2_jdesc *jd,
|
|
struct gfs2_log_header_host *head,
|
|
unsigned int pass)
|
|
{
|
|
int x;
|
|
for (x = 0; gfs2_log_ops[x]; x++)
|
|
if (gfs2_log_ops[x]->lo_before_scan)
|
|
gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
|
|
}
|
|
|
|
static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
|
|
struct gfs2_log_descriptor *ld,
|
|
__be64 *ptr,
|
|
unsigned int pass)
|
|
{
|
|
int x, error;
|
|
for (x = 0; gfs2_log_ops[x]; x++)
|
|
if (gfs2_log_ops[x]->lo_scan_elements) {
|
|
error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
|
|
ld, ptr, pass);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
|
|
unsigned int pass)
|
|
{
|
|
int x;
|
|
for (x = 0; gfs2_log_ops[x]; x++)
|
|
if (gfs2_log_ops[x]->lo_before_scan)
|
|
gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
|
|
}
|
|
|
|
#endif /* __LOPS_DOT_H__ */
|
|
|