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gerrit-public.fairphone.software / fp2-dev / kernel / msm / ed4878e8a4f550fd357ce5144cfd412015f6a111 / . / fs / gfs2 / log.h
blob: 0d007f92023411b00015a74d247095e8f7354f37 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -0400[diff] [blame]3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400[diff] [blame]7 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]8 */
9
10#ifndef __LOG_DOT_H__
11#define __LOG_DOT_H__
12
Steven Whitehousef2f7ba52006-09-05 10:39:21 -0400[diff] [blame]13#include <linux/list.h>
14#include <linux/spinlock.h>
15#include "incore.h"
16
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]17/**
18 * gfs2_log_lock - acquire the right to mess with the log manager
19 * @sdp: the filesystem
20 *
21 */
22
23static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
Harvey Harrison2d81afb2008-05-29 18:27:51 -0700[diff] [blame]24__acquires(&sdp->sd_log_lock)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]25{
26 spin_lock(&sdp->sd_log_lock);
27}
28
29/**
30 * gfs2_log_unlock - release the right to mess with the log manager
31 * @sdp: the filesystem
32 *
33 */
34
35static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
Harvey Harrison2d81afb2008-05-29 18:27:51 -0700[diff] [blame]36__releases(&sdp->sd_log_lock)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]37{
38 spin_unlock(&sdp->sd_log_lock);
39}
40
41static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
42 unsigned int value)
43{
44 if (++value == sdp->sd_jdesc->jd_blocks) {
45 value = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]46 }
47 sdp->sd_log_head = sdp->sd_log_tail = value;
48}
49
Bob Petersoned4878e2010-05-20 23:30:11 -0400[diff] [blame^]50extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]51 unsigned int ssize);
52
Bob Petersoned4878e2010-05-20 23:30:11 -0400[diff] [blame^]53extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
54extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]55
Bob Petersoned4878e2010-05-20 23:30:11 -0400[diff] [blame^]56extern struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
57extern struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]58 struct buffer_head *real);
Bob Petersoned4878e2010-05-20 23:30:11 -0400[diff] [blame^]59extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
60extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
61extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
Steven Whitehouse2bcd6102007-11-08 14:25:12 +0000[diff] [blame]62
Bob Petersoned4878e2010-05-20 23:30:11 -0400[diff] [blame^]63extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
64extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
65extern int gfs2_logd(void *data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]66
67#endif /* __LOG_DOT_H__ */