fs/gfs2/trans.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 __TRANS_DOT_H__
  11 #define __TRANS_DOT_H__
  12
  13 #include <linux/buffer_head.h>
  14 struct gfs2_sbd;
  15 struct gfs2_rgrpd;
  16 struct gfs2_glock;
  17
  18 #define RES_DINODE      1
  19 #define RES_INDIRECT    1
  20 #define RES_JDATA       1
  21 #define RES_DATA        1
  22 #define RES_LEAF        1
  23 #define RES_RG_HDR      1
  24 #define RES_RG_BIT      2
  25 #define RES_EATTR       1
  26 #define RES_STATFS      1
  27 #define RES_QUOTA       2
  28
  29 /* reserve either the number of blocks to be allocated plus the rg header
  30  * block, or all of the blocks in the rg, whichever is smaller */
  31 static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip)
  32 {
  33         const struct gfs2_blkreserv *rs = ip->i_res;
  34         if (rs->rs_requested < ip->i_rgd->rd_length)
  35                 return rs->rs_requested + 1;
  36         return ip->i_rgd->rd_length;
  37 }
  38
  39 extern int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
  40                             unsigned int revokes);
  41
  42 extern void gfs2_trans_end(struct gfs2_sbd *sdp);
  43 extern void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta);
  44 extern void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  45 extern void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
  46
  47 #endif /* __TRANS_DOT_H__ */