forked from luck/tmp_suning_uos_patched
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 */
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/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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*/
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#ifndef __LOPS_DOT_H__
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#define __LOPS_DOT_H__
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#include <linux/list.h>
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#include "incore.h"
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#define BUF_OFFSET \
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((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
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~(sizeof(__be64) - 1))
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#define DATABUF_OFFSET \
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((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
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~(2 * sizeof(__be64) - 1))
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extern const struct gfs2_log_operations *gfs2_log_ops[];
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extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
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extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
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extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
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unsigned size, unsigned offset, u64 blkno);
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extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
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extern void gfs2_log_submit_bio(struct bio **biop, int opf);
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extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
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extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
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struct gfs2_log_header_host *head, bool keep_cache);
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static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
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{
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unsigned int limit;
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limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
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return limit;
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}
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static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
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{
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unsigned int limit;
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limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
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return limit;
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}
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static inline void lops_before_commit(struct gfs2_sbd *sdp,
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struct gfs2_trans *tr)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_commit)
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gfs2_log_ops[x]->lo_before_commit(sdp, tr);
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}
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static inline void lops_after_commit(struct gfs2_sbd *sdp,
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struct gfs2_trans *tr)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_after_commit)
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gfs2_log_ops[x]->lo_after_commit(sdp, tr);
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}
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static inline void lops_before_scan(struct gfs2_jdesc *jd,
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struct gfs2_log_header_host *head,
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unsigned int pass)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_scan)
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gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
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}
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static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
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struct gfs2_log_descriptor *ld,
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__be64 *ptr,
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unsigned int pass)
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{
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int x, error;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_scan_elements) {
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error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
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ld, ptr, pass);
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if (error)
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return error;
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}
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return 0;
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}
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static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
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unsigned int pass)
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{
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int x;
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for (x = 0; gfs2_log_ops[x]; x++)
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if (gfs2_log_ops[x]->lo_before_scan)
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gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
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}
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#endif /* __LOPS_DOT_H__ */
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