2 * newdir.c --- create a new directory block
4 * Copyright (C) 1994, 1995 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
27 * Create new directory block
29 errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
30 ext2_ino_t parent_ino, char **block)
32 struct ext2_dir_entry *dir = NULL;
37 struct ext2_dir_entry_tail *t;
40 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
42 retval = ext2fs_get_mem(fs->blocksize, &buf);
45 memset(buf, 0, fs->blocksize);
46 dir = (struct ext2_dir_entry *) buf;
48 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
49 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
50 csum_size = sizeof(struct ext2_dir_entry_tail);
52 retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir);
54 ext2fs_free_mem(&buf);
59 if (fs->super->s_feature_incompat &
60 EXT2_FEATURE_INCOMPAT_FILETYPE)
61 filetype = EXT2_FT_DIR;
63 * Set up entry for '.'
66 ext2fs_dirent_set_name_len(dir, 1);
67 ext2fs_dirent_set_file_type(dir, filetype);
69 rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
70 dir->rec_len = EXT2_DIR_REC_LEN(1);
73 * Set up entry for '..'
75 dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
76 retval = ext2fs_set_rec_len(fs, rec_len, dir);
78 ext2fs_free_mem(&buf);
81 dir->inode = parent_ino;
82 ext2fs_dirent_set_name_len(dir, 2);
83 ext2fs_dirent_set_file_type(dir, filetype);
90 t = EXT2_DIRENT_TAIL(buf, fs->blocksize);
91 ext2fs_initialize_dirent_tail(fs, t);
98 * Create new directory on inline data
100 errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
101 ext2_ino_t parent_ino, __u32 *iblock)
103 struct ext2_dir_entry *dir = NULL;
109 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
111 iblock[0] = ext2fs_cpu_to_le32(parent_ino);
113 dir = (struct ext2_dir_entry *)((char *)iblock +
114 EXT4_INLINE_DATA_DOTDOT_SIZE);
116 rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE;
117 retval = ext2fs_set_rec_len(fs, rec_len, dir);
121 #ifdef WORDS_BIGENDIAN
122 retval = ext2fs_dirent_swab_out2(fs, (char *)dir, rec_len, 0);