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gerrit-public.fairphone.software / kernel / msm / c70975bc8d5bac487616785f5d5bc7b090dfa2d9 / . / fs / gfs2 / log.h
blob: 7c64510ccfd250f0b8f45fa8376598cd2b626072 [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
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]50unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
51 unsigned int ssize);
52
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]53int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
54void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
Steven Whitehouse16615be2007-09-17 10:59:52 +0100[diff] [blame]55void gfs2_log_incr_head(struct gfs2_sbd *sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]56
57struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
58struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
59 struct buffer_head *real);
Steven Whitehouse2bcd6102007-11-08 14:25:12 +0000[diff] [blame]60void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
61
62static inline void gfs2_log_flush(struct gfs2_sbd *sbd, struct gfs2_glock *gl)
63{
64 if (!gl || test_bit(GLF_LFLUSH, &gl->gl_flags))
65 __gfs2_log_flush(sbd, gl);
66}
67
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]68void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100[diff] [blame]69void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]70
71void gfs2_log_shutdown(struct gfs2_sbd *sdp);
Steven Whitehousea25311c2006-11-23 11:06:35 -0500[diff] [blame]72void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
Steven Whitehouseec69b182007-11-09 10:01:41 +0000[diff] [blame]73int gfs2_logd(void *data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]74
75#endif /* __LOG_DOT_H__ */