core/fs/xfs/xfs_dir2.h

   1 /*
   2  * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write the Free Software Foundation,
  15  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16  */
  17
  18 #ifndef XFS_DIR2_H_
  19 #define XFS_DIR2_H_
  20
  21 #include <core.h>
  22 #include <fs.h>
  23
  24 #include "xfs.h"
  25
  26 char *xfs_dir2_get_entry_name(uint8_t *start, uint8_t *end);
  27 void *xfs_dir2_get_dirblks(struct fs_info *fs, block_t startblock,
  28                            xfs_filblks_t c);
  29 uint32_t xfs_dir2_da_hashname(const uint8_t *name, int namelen);
  30 block_t xfs_dir2_get_right_blk(struct fs_info *fs, xfs_dinode_t *core,
  31                                uint32_t from, uint32_t to, block_t fsblkno,
  32                                int *error);
  33
  34 struct inode *xfs_dir2_local_find_entry(const char *dname, struct inode *parent,
  35                                         xfs_dinode_t *core);
  36 struct inode *xfs_dir2_block_find_entry(const char *dname, struct inode *parent,
  37                                         xfs_dinode_t *core);
  38 struct inode *xfs_dir2_leaf_find_entry(const char *dname, struct inode *parent,
  39                                        xfs_dinode_t *core);
  40 struct inode *xfs_dir2_node_find_entry(const char *dname, struct inode *parent,
  41                                        xfs_dinode_t *core);
  42
  43 static inline bool xfs_dir2_isleaf(struct fs_info *fs, xfs_dinode_t *dip)
  44 {
  45     uint64_t last = 0;
  46     xfs_bmbt_irec_t irec;
  47
  48     bmbt_irec_get(&irec, ((xfs_bmbt_rec_t *)&dip->di_literal_area[0]) +
  49                          be32_to_cpu(dip->di_nextents) - 1);
  50     last = irec.br_startoff + irec.br_blockcount;
  51
  52     return (last == XFS_INFO(fs)->dirleafblk + (1 << XFS_INFO(fs)->dirblklog));
  53 }
  54
  55 #endif /* XFS_DIR2_H_ */