static int do_ext2fs_mkdir()

in fs/extfs/extfs.cpp [282:321]

• 34 lines of code
• 10 McCabe index (conditional complexity)

static int do_ext2fs_mkdir(ext2_filsys fs, const char *path, int mode) {
    ext2_ino_t parent, ino;
    errcode_t ret = 0;

    DEFER(LOG_DEBUG("mkdir ", VALUE(path), VALUE(parent), VALUE(ino), VALUE(ret)));
    ino = string_to_inode(fs, path, 0);
    if (ino) {
        return -(ret = EEXIST);
    }
    parent = get_parent_dir_ino(fs, path);
    if (parent == 0) {
        return -(ret = ENOTDIR);
    }
    char *filename = get_filename(path);
    if (filename == nullptr) {
        // This should never happen.
        return -(ret = EISDIR);
    }

    ret = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR, 0, &ino);
    if (ret) return parse_extfs_error(fs, 0, ret);
    ret = ext2fs_mkdir(fs, parent, ino, filename);
    if (ret == EXT2_ET_DIR_NO_SPACE) {
        ret = ext2fs_expand_dir(fs, parent);
        if (ret) return parse_extfs_error(fs, 0, ret);

        ret = ext2fs_mkdir(fs, parent, ino, filename);
    }
    if (ret) return parse_extfs_error(fs, 0, ret);

    struct ext2_inode_large inode;
    memset(&inode, 0, sizeof(inode));
    ret = ext2fs_read_inode_full(fs, ino, (struct ext2_inode *)&inode, sizeof(inode));
    if (ret) return parse_extfs_error(fs, 0, ret);
    inode.i_mode = (mode & ~LINUX_S_IFMT) | LINUX_S_IFDIR;
    ret = ext2fs_write_inode_full(fs, ino, (struct ext2_inode *)&inode, sizeof(inode));
    if (ret) return parse_extfs_error(fs, 0, ret);

    return 0;
}