fs/gfs2/log.h

   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 v.2.
   8  */
   9
  10 #ifndef __LOG_DOT_H__
  11 #define __LOG_DOT_H__
  12
  13 /**
  14  * gfs2_log_lock - acquire the right to mess with the log manager
  15  * @sdp: the filesystem
  16  *
  17  */
  18
  19 static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
  20 {
  21         spin_lock(&sdp->sd_log_lock);
  22 }
  23
  24 /**
  25  * gfs2_log_unlock - release the right to mess with the log manager
  26  * @sdp: the filesystem
  27  *
  28  */
  29
  30 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
  31 {
  32         spin_unlock(&sdp->sd_log_lock);
  33 }
  34
  35 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
  36                                           unsigned int value)
  37 {
  38         if (++value == sdp->sd_jdesc->jd_blocks) {
  39                 value = 0;
  40         }
  41         sdp->sd_log_head = sdp->sd_log_tail = value;
  42 }
  43
  44 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
  45                             unsigned int ssize);
  46
  47 void gfs2_ail1_start(struct gfs2_sbd *sdp, int flags);
  48 int gfs2_ail1_empty(struct gfs2_sbd *sdp, int flags);
  49
  50 int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
  51 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
  52
  53 struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
  54 struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
  55                                       struct buffer_head *real);
  56 void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
  57 void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
  58
  59 void gfs2_log_shutdown(struct gfs2_sbd *sdp);
  60
  61 #endif /* __LOG_DOT_H__ */