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 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 <linux/writeback.h>
  16 #include "incore.h"
  17 #include "inode.h"
  18
  19 /**
  20  * gfs2_log_lock - acquire the right to mess with the log manager
  21  * @sdp: the filesystem
  22  *
  23  */
  24
  25 static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
  26 __acquires(&sdp->sd_log_lock)
  27 {
  28         spin_lock(&sdp->sd_log_lock);
  29 }
  30
  31 /**
  32  * gfs2_log_unlock - release the right to mess with the log manager
  33  * @sdp: the filesystem
  34  *
  35  */
  36
  37 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
  38 __releases(&sdp->sd_log_lock)
  39 {
  40         spin_unlock(&sdp->sd_log_lock);
  41 }
  42
  43 static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
  44                                           unsigned int value)
  45 {
  46         if (++value == sdp->sd_jdesc->jd_blocks) {
  47                 value = 0;
  48         }
  49         sdp->sd_log_head = sdp->sd_log_tail = value;
  50 }
  51
  52 static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
  53 {
  54         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  55
  56         if (gfs2_is_jdata(ip) || !gfs2_is_ordered(sdp))
  57                 return;
  58
  59         if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
  60                 spin_lock(&sdp->sd_ordered_lock);
  61                 if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
  62                         list_add(&ip->i_ordered, &sdp->sd_log_ordered);
  63                 spin_unlock(&sdp->sd_ordered_lock);
  64         }
  65 }
  66 extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
  67 extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
  68                             unsigned int ssize);
  69
  70 extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
  71 extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
  72 extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
  73                                   u64 seq, u32 tail, u32 lblock, u32 flags,
  74                                   int op_flags);
  75 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
  76                            u32 type);
  77 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
  78 extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
  79
  80 extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
  81 extern int gfs2_logd(void *data);
  82 extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  83 extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
  84
  85 #endif /* __LOG_DOT_H__ */