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Diffstat (limited to 'sys/fs/ext2fs/htree.h')
| -rw-r--r-- | sys/fs/ext2fs/htree.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sys/fs/ext2fs/htree.h b/sys/fs/ext2fs/htree.h new file mode 100644 index 0000000..b573ccf --- /dev/null +++ b/sys/fs/ext2fs/htree.h @@ -0,0 +1,100 @@ +/*- + * Copyright (c) 2010, 2012 Zheng Liu <lz@freebsd.org> + * Copyright (c) 2012, Vyacheslav Matyushin + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _FS_EXT2FS_HTREE_H_ +#define _FS_EXT2FS_HTREE_H_ + +/* EXT3 HTree directory indexing */ + +#define EXT2_HTREE_LEGACY 0 +#define EXT2_HTREE_HALF_MD4 1 +#define EXT2_HTREE_TEA 2 +#define EXT2_HTREE_LEGACY_UNSIGNED 3 +#define EXT2_HTREE_HALF_MD4_UNSIGNED 4 +#define EXT2_HTREE_TEA_UNSIGNED 5 + +#define EXT2_HTREE_EOF 0x7FFFFFFF + +struct ext2fs_fake_direct { + uint32_t e2d_ino; /* inode number of entry */ + uint16_t e2d_reclen; /* length of this record */ + uint8_t e2d_namlen; /* length of string in d_name */ + uint8_t e2d_type; /* file type */ +}; + +struct ext2fs_htree_count { + uint16_t h_entries_max; + uint16_t h_entries_num; +}; + +struct ext2fs_htree_entry { + uint32_t h_hash; + uint32_t h_blk; +}; + +struct ext2fs_htree_root_info { + uint32_t h_reserved1; + uint8_t h_hash_version; + uint8_t h_info_len; + uint8_t h_ind_levels; + uint8_t h_reserved2; +}; + +struct ext2fs_htree_root { + struct ext2fs_fake_direct h_dot; + char h_dot_name[4]; + struct ext2fs_fake_direct h_dotdot; + char h_dotdot_name[4]; + struct ext2fs_htree_root_info h_info; + struct ext2fs_htree_entry h_entries[0]; +}; + +struct ext2fs_htree_node { + struct ext2fs_fake_direct h_fake_dirent; + struct ext2fs_htree_entry h_entries[0]; +}; + +struct ext2fs_htree_lookup_level { + struct buf *h_bp; + struct ext2fs_htree_entry *h_entries; + struct ext2fs_htree_entry *h_entry; +}; + +struct ext2fs_htree_lookup_info { + struct ext2fs_htree_lookup_level h_levels[2]; + uint32_t h_levels_num; +}; + +struct ext2fs_htree_sort_entry { + uint16_t h_offset; + uint16_t h_size; + uint32_t h_hash; +}; + +#endif /* !_FS_EXT2FS_HTREE_H_ */ |
