From 464df1d5e5ab1322e2dd0a7796939fff1aeefa9a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:49:25 +0200 Subject: Adding upstream version 1.47.0. Signed-off-by: Daniel Baumann --- lib/ext2fs/newdir.c | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 lib/ext2fs/newdir.c (limited to 'lib/ext2fs/newdir.c') diff --git a/lib/ext2fs/newdir.c b/lib/ext2fs/newdir.c new file mode 100644 index 0000000..7f47285 --- /dev/null +++ b/lib/ext2fs/newdir.c @@ -0,0 +1,126 @@ +/* + * newdir.c --- create a new directory block + * + * Copyright (C) 1994, 1995 Theodore Ts'o. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Library + * General Public License, version 2. + * %End-Header% + */ + +#include "config.h" +#include +#include +#if HAVE_UNISTD_H +#include +#endif + +#include "ext2_fs.h" +#include "ext2fs.h" + +#ifndef EXT2_FT_DIR +#define EXT2_FT_DIR 2 +#endif + +/* + * Create new directory block + */ +errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, + ext2_ino_t parent_ino, char **block) +{ + struct ext2_dir_entry *dir = NULL; + errcode_t retval; + char *buf; + int rec_len; + int filetype = 0; + struct ext2_dir_entry_tail *t; + int csum_size = 0; + + EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); + + retval = ext2fs_get_mem(fs->blocksize, &buf); + if (retval) + return retval; + memset(buf, 0, fs->blocksize); + dir = (struct ext2_dir_entry *) buf; + + if (ext2fs_has_feature_metadata_csum(fs->super)) + csum_size = sizeof(struct ext2_dir_entry_tail); + + retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir); + if (retval) { + ext2fs_free_mem(&buf); + return retval; + } + + if (dir_ino) { + if (ext2fs_has_feature_filetype(fs->super)) + filetype = EXT2_FT_DIR; + /* + * Set up entry for '.' + */ + dir->inode = dir_ino; + ext2fs_dirent_set_name_len(dir, 1); + ext2fs_dirent_set_file_type(dir, filetype); + dir->name[0] = '.'; + rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1); + dir->rec_len = EXT2_DIR_REC_LEN(1); + + /* + * Set up entry for '..' + */ + dir = (struct ext2_dir_entry *) (buf + dir->rec_len); + retval = ext2fs_set_rec_len(fs, rec_len, dir); + if (retval) { + ext2fs_free_mem(&buf); + return retval; + } + dir->inode = parent_ino; + ext2fs_dirent_set_name_len(dir, 2); + ext2fs_dirent_set_file_type(dir, filetype); + dir->name[0] = '.'; + dir->name[1] = '.'; + + } + + if (csum_size) { + t = EXT2_DIRENT_TAIL(buf, fs->blocksize); + ext2fs_initialize_dirent_tail(fs, t); + } + *block = buf; + return 0; +} + +/* + * Create new directory on inline data + */ +errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, + ext2_ino_t dir_ino EXT2FS_ATTR((unused)), + ext2_ino_t parent_ino, __u32 *iblock) +{ + struct ext2_dir_entry *dir = NULL; + errcode_t retval; + int rec_len; + + EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); + + iblock[0] = ext2fs_cpu_to_le32(parent_ino); + + dir = (struct ext2_dir_entry *)((char *)iblock + + EXT4_INLINE_DATA_DOTDOT_SIZE); + dir->inode = 0; + rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE; + retval = ext2fs_set_rec_len(fs, rec_len, dir); + if (retval) + goto errout; + +#ifdef WORDS_BIGENDIAN + retval = ext2fs_dirent_swab_out2(fs, (char *)dir, rec_len, 0); + if (retval) + goto errout; +#endif + +errout: + return retval; +} -- cgit v1.2.3