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 const void *xfs_dir2_dirblks_get_cached(struct fs_info *fs, block_t startblock,
27 xfs_filblks_t c);
28 void xfs_dir2_dirblks_flush_cache(void);
29
30 uint32_t xfs_dir2_da_hashname(const uint8_t *name, int namelen);
31
32 block_t xfs_dir2_get_right_blk(struct fs_info *fs, xfs_dinode_t *core,
33 block_t fsblkno, int *error);
34
35 struct inode *xfs_dir2_local_find_entry(const char *dname, struct inode *parent,
36 xfs_dinode_t *core);
37 struct inode *xfs_dir2_block_find_entry(const char *dname, struct inode *parent,
38 xfs_dinode_t *core);
39 struct inode *xfs_dir2_leaf_find_entry(const char *dname, struct inode *parent,
40 xfs_dinode_t *core);
41 struct inode *xfs_dir2_node_find_entry(const char *dname, struct inode *parent,
42 xfs_dinode_t *core);
43
xfs_dir2_isleaf(struct fs_info * fs,xfs_dinode_t * dip)44 static inline bool xfs_dir2_isleaf(struct fs_info *fs, xfs_dinode_t *dip)
45 {
46 uint64_t last = 0;
47 xfs_bmbt_irec_t irec;
48
49 bmbt_irec_get(&irec, ((xfs_bmbt_rec_t *)&dip->di_literal_area[0]) +
50 be32_to_cpu(dip->di_nextents) - 1);
51 last = irec.br_startoff + irec.br_blockcount;
52
53 return (last == XFS_INFO(fs)->dirleafblk + (1 << XFS_INFO(fs)->dirblklog));
54 }
55
xfs_dir2_entry_name_cmp(uint8_t * start,uint8_t * end,const char * name)56 static inline int xfs_dir2_entry_name_cmp(uint8_t *start, uint8_t *end,
57 const char *name)
58 {
59 if (!name || (strlen(name) != end - start))
60 return -1;
61
62 while (start < end)
63 if (*start++ != *name++)
64 return -1;
65
66 return 0;
67 }
68
69 #endif /* XFS_DIR2_H_ */
70