fs/gfs2/rgrp.h

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2008 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 __RGRP_DOT_H__
  11 #define __RGRP_DOT_H__
  12
  13 #include <linux/slab.h>
  14
  15 struct gfs2_rgrpd;
  16 struct gfs2_sbd;
  17 struct gfs2_holder;
  18
  19 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
  20
  21 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk);
  22 extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
  23 extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
  24
  25 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
  26 extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
  27 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
  28 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
  29 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
  30
  31 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
  32 static inline void gfs2_alloc_put(struct gfs2_inode *ip)
  33 {
  34         BUG_ON(ip->i_alloc == NULL);
  35         kfree(ip->i_alloc);
  36         ip->i_alloc = NULL;
  37 }
  38
  39 extern int gfs2_inplace_reserve(struct gfs2_inode *ip);
  40 extern void gfs2_inplace_release(struct gfs2_inode *ip);
  41
  42 extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n);
  43 extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation);
  44
  45 extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
  46 extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
  47 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
  48 extern void gfs2_unlink_di(struct inode *inode);
  49 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
  50                                unsigned int type);
  51
  52 struct gfs2_rgrp_list {
  53         unsigned int rl_rgrps;
  54         unsigned int rl_space;
  55         struct gfs2_rgrpd **rl_rgd;
  56         struct gfs2_holder *rl_ghs;
  57 };
  58
  59 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
  60                            u64 block);
  61 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
  62 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
  63 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
  64 extern int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
  65 extern void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
  66                                     struct buffer_head *bh,
  67                                     const struct gfs2_bitmap *bi);
  68
  69 #endif /* __RGRP_DOT_H__ */