1/* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 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 7 * of the GNU General Public License version 2. 8 */ 9 10#ifndef __LOG_DOT_H__ 11#define __LOG_DOT_H__ 12 13#include <linux/list.h> 14#include <linux/spinlock.h> 15#include "incore.h" 16 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) 24__acquires(&sdp->sd_log_lock) 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) 36__releases(&sdp->sd_log_lock) 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; 46 } 47 sdp->sd_log_head = sdp->sd_log_tail = value; 48} 49 50extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct, 51 unsigned int ssize); 52 53extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks); 54extern void gfs2_log_incr_head(struct gfs2_sbd *sdp); 55 56extern struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp); 57extern struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, 58 struct buffer_head *real); 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); 62 63extern void gfs2_log_shutdown(struct gfs2_sbd *sdp); 64extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 65extern int gfs2_logd(void *data); 66 67#endif /* __LOG_DOT_H__ */ 68