fs/nilfs2/sufile.h

   1 /*
   2  * sufile.h - NILFS segment usage file.
   3  *
   4  * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * Written by Koji Sato <koji@osrg.net>.
  21  */
  22
  23 #ifndef _NILFS_SUFILE_H
  24 #define _NILFS_SUFILE_H
  25
  26 #include <linux/fs.h>
  27 #include <linux/buffer_head.h>
  28 #include <linux/nilfs2_fs.h>
  29 #include "mdt.h"
  30
  31 #define NILFS_SUFILE_GFP        NILFS_MDT_GFP
  32
  33 static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile)
  34 {
  35         return NILFS_MDT(sufile)->mi_nilfs->ns_nsegments;
  36 }
  37
  38 int nilfs_sufile_alloc(struct inode *, __u64 *);
  39 int nilfs_sufile_cancel_free(struct inode *, __u64);
  40 int nilfs_sufile_freev(struct inode *, __u64 *, size_t);
  41 int nilfs_sufile_free(struct inode *, __u64);
  42 int nilfs_sufile_get_segment_usage(struct inode *, __u64,
  43                                    struct nilfs_segment_usage **,
  44                                    struct buffer_head **);
  45 void nilfs_sufile_put_segment_usage(struct inode *, __u64,
  46                                     struct buffer_head *);
  47 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
  48 int nilfs_sufile_get_ncleansegs(struct inode *, unsigned long *);
  49 int nilfs_sufile_set_error(struct inode *, __u64);
  50 ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, struct nilfs_suinfo *,
  51                                 size_t);
  52
  53
  54 #endif  /* _NILFS_SUFILE_H */