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  * directory operations vector for encode/decode routines
  36  */
  37 struct xfs_dir_ops {
  38         int     (*sf_entsize)(struct xfs_dir2_sf_hdr *hdr, int len);
  39         struct xfs_dir2_sf_entry *
  40                 (*sf_nextentry)(struct xfs_dir2_sf_hdr *hdr,
  41                                 struct xfs_dir2_sf_entry *sfep);
  42 };
  43
  44 extern const struct xfs_dir_ops xfs_dir2_ops;
  45 extern const struct xfs_dir_ops xfs_dir2_ftype_ops;
  46 extern const struct xfs_dir_ops xfs_dir3_ops;
  47
  48 /*
  49  * Generic directory interface routines
  50  */
  51 extern void xfs_dir_startup(void);
  52 extern void xfs_dir_mount(struct xfs_mount *mp);
  53 extern int xfs_dir_isempty(struct xfs_inode *dp);
  54 extern int xfs_dir_init(struct xfs_trans *tp, struct xfs_inode *dp,
  55                                 struct xfs_inode *pdp);
  56 extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp,
  57                                 struct xfs_name *name, xfs_ino_t inum,
  58                                 xfs_fsblock_t *first,
  59                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  60 extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp,
  61                                 struct xfs_name *name, xfs_ino_t *inum,
  62                                 struct xfs_name *ci_name);
  63 extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
  64                                 struct xfs_name *name, xfs_ino_t ino,
  65                                 xfs_fsblock_t *first,
  66                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  67 extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
  68                                 struct xfs_name *name, xfs_ino_t inum,
  69                                 xfs_fsblock_t *first,
  70                                 struct xfs_bmap_free *flist, xfs_extlen_t tot);
  71 extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
  72                                 struct xfs_name *name, uint resblks);
  73
  74 /*
  75  * Direct call from the bmap code, bypassing the generic directory layer.
  76  */
  77 extern int xfs_dir2_sf_to_block(struct xfs_da_args *args);
  78
  79 /*
  80  * Interface routines used by userspace utilities
  81  */
  82 extern xfs_ino_t xfs_dir2_sf_get_parent_ino(struct xfs_dir2_sf_hdr *sfp);
  83 extern void xfs_dir2_sf_put_parent_ino(struct xfs_dir2_sf_hdr *sfp,
  84                 xfs_ino_t ino);
  85 extern xfs_ino_t xfs_dir3_sfe_get_ino(struct xfs_mount *mp,
  86                 struct xfs_dir2_sf_hdr *sfp, struct xfs_dir2_sf_entry *sfep);
  87 extern void xfs_dir3_sfe_put_ino(struct xfs_mount *mp,
  88                 struct xfs_dir2_sf_hdr *hdr, struct xfs_dir2_sf_entry *sfep,
  89                 xfs_ino_t ino);
  90
  91 extern int xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *r);
  92 extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *r);
  93 extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
  94                                 struct xfs_buf *bp);
  95
  96 extern void xfs_dir2_data_freescan(struct xfs_mount *mp,
  97                 struct xfs_dir2_data_hdr *hdr, int *loghead);
  98 extern void xfs_dir2_data_log_entry(struct xfs_trans *tp, struct xfs_buf *bp,
  99                 struct xfs_dir2_data_entry *dep);
 100 extern void xfs_dir2_data_log_header(struct xfs_trans *tp,
 101                 struct xfs_buf *bp);
 102 extern void xfs_dir2_data_log_unused(struct xfs_trans *tp, struct xfs_buf *bp,
 103                 struct xfs_dir2_data_unused *dup);
 104 extern void xfs_dir2_data_make_free(struct xfs_trans *tp, struct xfs_buf *bp,
 105                 xfs_dir2_data_aoff_t offset, xfs_dir2_data_aoff_t len,
 106                 int *needlogp, int *needscanp);
 107 extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp,
 108                 struct xfs_dir2_data_unused *dup, xfs_dir2_data_aoff_t offset,
 109                 xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp);
 110
 111 extern struct xfs_dir2_data_free *xfs_dir2_data_freefind(
 112                 struct xfs_dir2_data_hdr *hdr, struct xfs_dir2_data_unused *dup);
 113
 114 extern const struct xfs_buf_ops xfs_dir3_block_buf_ops;
 115 extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops;
 116 extern const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops;
 117 extern const struct xfs_buf_ops xfs_dir3_free_buf_ops;
 118 extern const struct xfs_buf_ops xfs_dir3_data_buf_ops;
 119
 120 #endif  /* __XFS_DIR2_H__ */