66     uint32_t cluster = finode->first_clus;  in __fat32_search_long_short()  local
75 …     uint64_t sector = __fat32_calculate_LBA(fsbi->first_data_sector, fsbi->sec_per_clus, cluster);  in __fat32_search_long_short()
283         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in __fat32_search_long_short()
285         if (cluster >= 0x0ffffff7) // 寻找完父目录的所有簇，都没有找到目标文件名  in __fat32_search_long_short()
302     sinfo->i_pos = __fat32_calculate_LBA(fsbi->first_data_sector, fsbi->sec_per_clus, cluster);  in __fat32_search_long_short()
581     uint64_t cluster = finode->first_clus;  in fat32_read()  local
592     if (!cluster)  in fat32_read()
597         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_read()
614         uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_read()
643         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_read()
644     } while (bytes_remain && (cluster < 0x0ffffff8) && cluster != 0);  in fat32_read()
669     uint32_t cluster = finode->first_clus;  in fat32_write()  local
677     if (!cluster) // 起始簇号为0，说明是空文件  in fat32_write()
680         if (fat32_alloc_clusters(file_ptr->dEntry->dir_inode, &cluster, 1) != 0)  in fat32_write()
687             cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_write()
691     if (!cluster)  in fat32_write()
706         sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus; // 计算对应的扇区  in fat32_write()
752             next_clus = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_write()
764             cluster = next_clus; // 切换当前簇  in fat32_write()
1164     uint32_t cluster = finode->first_clus;  in fat32_readdir()  local
1172         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_readdir()
1173         if (cluster > 0x0ffffff7) // 文件结尾  in fat32_readdir()
1185     while (cluster <= 0x0ffffff7) // cluster在循环末尾更新（如果当前簇已经没有短目录项的话）  in fat32_readdir()
1188         uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_readdir()
1323         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_readdir()