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 struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk);
  22 struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
  23 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_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh);
  27
  28 extern int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd);
  29 extern void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd);
  30 extern void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd);
  31
  32 extern void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd);
  33
  34 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
  35 static inline void gfs2_alloc_put(struct gfs2_inode *ip)
  36 {
  37         BUG_ON(ip->i_alloc == NULL);
  38         kfree(ip->i_alloc);
  39         ip->i_alloc = NULL;
  40 }
  41
  42 extern int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex,
  43                                   char *file, unsigned int line);
  44 #define gfs2_inplace_reserve(ip) \
  45         gfs2_inplace_reserve_i((ip), 1, __FILE__, __LINE__)
  46 #define gfs2_inplace_reserve_ri(ip) \
  47         gfs2_inplace_reserve_i((ip), 0, __FILE__, __LINE__)
  48
  49 extern void gfs2_inplace_release(struct gfs2_inode *ip);
  50
  51 extern int gfs2_ri_update(struct gfs2_inode *ip);
  52 extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n);
  53 extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation);
  54
  55 extern void __gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen);
  56 extern void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen);
  57 extern void __gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
  58 extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
  59 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
  60 extern void gfs2_unlink_di(struct inode *inode);
  61 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
  62                                unsigned int type);
  63
  64 struct gfs2_rgrp_list {
  65         unsigned int rl_rgrps;
  66         unsigned int rl_space;
  67         struct gfs2_rgrpd **rl_rgd;
  68         struct gfs2_holder *rl_ghs;
  69 };
  70
  71 extern void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
  72                            u64 block);
  73 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
  74 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
  75 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
  76 extern int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
  77
  78 #endif /* __RGRP_DOT_H__ */