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 23 static inline void gfs2_log_lock(struct gfs2_sbd *sdp) 24 { 25 spin_lock(&sdp->sd_log_lock); 26 } 27 28 /** 29 * gfs2_log_unlock - release the right to mess with the log manager 30 * @sdp: the filesystem 31 * 32 */ 33 34 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp) 35 { 36 spin_unlock(&sdp->sd_log_lock); 37 } 38 39 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp, 40 unsigned int value) 41 { 42 if (++value == sdp->sd_jdesc->jd_blocks) { 43 value = 0; 44 } 45 sdp->sd_log_head = sdp->sd_log_tail = value; 46 } 47 48 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct, 49 unsigned int ssize); 50 51 int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags); 52 53 int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks); 54 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks); 55 56 struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp); 57 struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp, 58 struct buffer_head *real); 59 void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl); 60 void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans); 61 62 void gfs2_log_shutdown(struct gfs2_sbd *sdp); 63 void gfs2_meta_syncfs(struct gfs2_sbd *sdp); 64 65 #endif /* __LOG_DOT_H__ */ 66