fs/xfs/xfs_dir2.h

   1 /*
   2  * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_DIR2_H__
  19 #define __XFS_DIR2_H__
  20
  21 struct xfs_bmap_free;
  22 struct xfs_da_args;
  23 struct xfs_inode;
  24 struct xfs_mount;
  25 struct xfs_trans;
  26 struct xfs_dir2_sf_hdr;
  27 struct xfs_dir2_sf_entry;
  28 struct xfs_dir2_data_hdr;
  29 struct xfs_dir2_data_entry;
  30 struct xfs_dir2_data_unused;
  31
  32 extern struct xfs_name  xfs_name_dotdot;
  33
  34 /*
  35  * Generic directory interface routines
  36  */
  37 extern void xfs_dir_startup(void);
  38 extern void xfs_dir_mount(struct xfs_mount *mp);
  39 extern int xfs_dir_isempty(struct xfs_inode *dp);
  40 extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
  41                                 struct xfs_inode *pdp);
  42 extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
  43                                 struct xfs_name *name, xfs_ino_t inum,
  44                                 xfs_fsblock_t *first,
  45                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  46 extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
  47                                 struct xfs_name *name, xfs_ino_t *inum,
  48                                 struct xfs_name *ci_name);
  49 extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
  50                                 struct xfs_name *name, xfs_ino_t ino,
  51                                 xfs_fsblock_t *first,
  52                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  53 extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
  54                                 struct xfs_name *name, xfs_ino_t inum,
  55                                 xfs_fsblock_t *first,
  56                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  57 extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
  58                                 struct xfs_name *name, uint resblks);
  59
  60 /*
  61  * Direct call from the bmap code, bypassing the generic directory layer.
  62  */
  63 extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
  64
  65 /*
  66  * Interface routines used by userspace utilities
  67  */
  68 extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *sfp);
  69 extern void xfs_dir2_sf_put_parent_ino(struct xfs_dir2_sf_hdr *sfp,
  70                 xfs_ino_t ino);
  71 extern xfs_ino_t xfs_dir3_sfe_get_ino(struct xfs_mount *mp,
  72                 struct xfs_dir2_sf_hdr *sfp, struct xfs_dir2_sf_entry *sfep);
  73 extern void xfs_dir3_sfe_put_ino(struct xfs_mount *mp,
  74                 struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep,
  75                 xfs_ino_t ino);
  76
  77 extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *r);
  78 extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *r);
  79 extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
  80                                 struct xfs_buf *bp);
  81
  82 extern void xfs_dir2_data_freescan(struct xfs_mount *mp,
  83                 struct xfs_dir2_data_hdr *hdr, int *loghead);
  84 extern void xfs_dir2_data_log_entry(struct xfs_trans *tp, struct xfs_buf *bp,
  85                 struct xfs_dir2_data_entry *dep);
  86 extern void xfs_dir2_data_log_header(struct xfs_trans *tp,
  87                 struct xfs_buf *bp);
  88 extern void xfs_dir2_data_log_unused(struct xfs_trans *tp, struct xfs_buf *bp,
  89                 struct xfs_dir2_data_unused *dup);
  90 extern void xfs_dir2_data_make_free(struct xfs_trans *tp, struct xfs_buf *bp,
  91                 xfs_dir2_data_aoff_t offset, xfs_dir2_data_aoff_t len,
  92                 int *needlogp, int *needscanp);
  93 extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp,
  94                 struct xfs_dir2_data_unused *dup, xfs_dir2_data_aoff_t offset,
  95                 xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp);
  96
  97 extern struct xfs_dir2_data_free *xfs_dir2_data_freefind(
  98                 struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_unused *dup);
  99
 100 extern const struct xfs_buf_ops xfs_dir3_block_buf_ops;
 101 extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops;
 102 extern const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops;
 103 extern const struct xfs_buf_ops xfs_dir3_free_buf_ops;
 104 extern const struct xfs_buf_ops xfs_dir3_data_buf_ops;
 105
 106 #endif  /* __XFS_DIR2_H__ */