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kernel/linux-imx6_3.14.28/fs/gfs2/trans.h 1.49 KB
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  /*
   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   *
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions
   * of the GNU General Public License version 2.
   */
  
  #ifndef __TRANS_DOT_H__
  #define __TRANS_DOT_H__
  
  #include <linux/buffer_head.h>
  struct gfs2_sbd;
  struct gfs2_rgrpd;
  struct gfs2_glock;
  
  #define RES_DINODE	1
  #define RES_INDIRECT	1
  #define RES_JDATA	1
  #define RES_DATA	1
  #define RES_LEAF	1
  #define RES_RG_HDR	1
  #define RES_RG_BIT	2
  #define RES_EATTR	1
  #define RES_STATFS	1
  #define RES_QUOTA	2
  
  /* reserve either the number of blocks to be allocated plus the rg header
   * block, or all of the blocks in the rg, whichever is smaller */
  static inline unsigned int gfs2_rg_blocks(const struct gfs2_inode *ip, unsigned requested)
  {
  	if (requested < ip->i_rgd->rd_length)
  		return requested + 1;
  	return ip->i_rgd->rd_length;
  }
  
  extern int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
  			    unsigned int revokes);
  
  extern void gfs2_trans_end(struct gfs2_sbd *sdp);
  extern void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh);
  extern void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh);
  extern void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  extern void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
  
  #endif /* __TRANS_DOT_H__ */