60     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;  in __fat32_search_long_short()  local
63     uint8_t *buf = kzalloc(fsbi->bytes_per_clus, 0);  in __fat32_search_long_short()
75 …     uint64_t sector = __fat32_calculate_LBA(fsbi->first_data_sector, fsbi->sec_per_clus, cluster);  in __fat32_search_long_short()
80 …blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_READ_DMA_EXT, sector, fsbi->sec_per_clus, (uin…  in __fat32_search_long_short()
85         for (int i = 0; i < fsbi->bytes_per_clus; i += 32, ++tmp_dEntry)  in __fat32_search_long_short()
283         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  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()
319     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;  in fat32_lookup()  local
333     p->blocks = (p->file_size + fsbi->bytes_per_clus - 1) / fsbi->bytes_per_sec;  in fat32_lookup()
344 …finode->dEntry_location_clus = __fat32_LBA_to_cluster(fsbi->first_data_sector, fsbi->sec_per_clus,…  in fat32_lookup()
389     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)(sb_ptr->private_sb_info);  in fat32_read_superblock()  local
391     fsbi->starting_sector = blk->bd_start_LBA;  in fat32_read_superblock()
392     fsbi->sector_count = blk->bd_sectors_num;  in fat32_read_superblock()
393     fsbi->sec_per_clus = fbs->BPB_SecPerClus;  in fat32_read_superblock()
394     fsbi->bytes_per_clus = fbs->BPB_SecPerClus * fbs->BPB_BytesPerSec;  in fat32_read_superblock()
395     fsbi->bytes_per_sec = fbs->BPB_BytesPerSec;  in fat32_read_superblock()
396 …fsbi->first_data_sector = blk->bd_start_LBA + fbs->BPB_RsvdSecCnt + fbs->BPB_FATSz32 * fbs->BPB_Nu…  in fat32_read_superblock()
397     fsbi->FAT1_base_sector = blk->bd_start_LBA + fbs->BPB_RsvdSecCnt;  in fat32_read_superblock()
398     fsbi->FAT2_base_sector = fsbi->FAT1_base_sector + fbs->BPB_FATSz32;  in fat32_read_superblock()
399     fsbi->sec_per_FAT = fbs->BPB_FATSz32;  in fat32_read_superblock()
400     fsbi->NumFATs = fbs->BPB_NumFATs;  in fat32_read_superblock()
401     fsbi->fsinfo_sector_addr_infat = fbs->BPB_FSInfo;  in fat32_read_superblock()
402     fsbi->bootsector_bak_sector_addr_infat = fbs->BPB_BkBootSec;  in fat32_read_superblock()
409     memset(&fsbi->fsinfo, 0, sizeof(struct fat32_FSInfo_t));  in fat32_read_superblock()
411 …                   blk->bd_start_LBA + fsbi->fsinfo_sector_addr_infat, 1, (uint64_t)&fsbi->fsinfo);  in fat32_read_superblock()
414                  fsbi->fsinfo.FSI_LeadSig, fsbi->fsinfo.FSI_StrucSig, fsbi->fsinfo.FSI_Free_Count);  in fat32_read_superblock()
432         (sb_ptr->root->dir_inode->file_size + fsbi->bytes_per_clus - 1) / fsbi->bytes_per_sec;  in fat32_read_superblock()
490     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)inode->sb->private_sb_info;  in fat32_write_inode()  local
493 … uint64_t fLBA = fsbi->first_data_sector + (finode->dEntry_location_clus - 2) * fsbi->sec_per_clus;  in fat32_write_inode()
495     struct fat32_Directory_t *buf = (struct fat32_Directory_t *)kmalloc(fsbi->bytes_per_clus, 0);  in fat32_write_inode()
496     memset(buf, 0, fsbi->bytes_per_clus);  in fat32_write_inode()
499                                                    fsbi->sec_per_clus, (uint64_t)buf);  in fat32_write_inode()
510                                                    fsbi->sec_per_clus, (uint64_t)buf);  in fat32_write_inode()
577     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)(file_ptr->dEntry->dir_inode->sb->private_sb_info);  in fat32_read()  local
588     uint64_t clus_offset_in_file = (*position) / fsbi->bytes_per_clus;  in fat32_read()
590     uint64_t bytes_offset = (*position) % fsbi->bytes_per_clus;  in fat32_read()
597         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_read()
607     void *tmp_buffer = kmalloc(fsbi->bytes_per_clus, 0);  in fat32_read()
613         memset(tmp_buffer, 0, fsbi->bytes_per_clus);  in fat32_read()
614         uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_read()
617 …int errno = blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_READ_DMA_EXT, sector, fsbi->sec_pe…  in fat32_read()
627         if (bytes_remain > (fsbi->bytes_per_clus - bytes_offset))  in fat32_read()
628             step_trans_len = (fsbi->bytes_per_clus - bytes_offset);  in fat32_read()
643         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_read()
665     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)(file_ptr->dEntry->dir_inode->sb->private_sb_info);  in fat32_write()  local
673     uint64_t clus_offset_in_file = (*position) / fsbi->bytes_per_clus;  in fat32_write()
675     uint64_t bytes_offset = (*position) % fsbi->bytes_per_clus;  in fat32_write()
687             cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_write()
702     void *tmp_buffer = kmalloc(fsbi->bytes_per_clus, 0);  in fat32_write()
705         memset(tmp_buffer, 0, fsbi->bytes_per_clus);  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()
711 …rno = blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_READ_DMA_EXT, sector, fsbi->sec_per_clus,  in fat32_write()
722         if (bytes_remain > (fsbi->bytes_per_clus - bytes_offset))  in fat32_write()
723             step_trans_len = (fsbi->bytes_per_clus - bytes_offset);  in fat32_write()
734 …int errno = blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_WRITE_DMA_EXT, sector, fsbi->sec_p…  in fat32_write()
752             next_clus = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_write()
851     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;  in fat32_create()  local
877     inode->blocks = fsbi->sec_per_clus;  in fat32_create()
925 …blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_WRITE_DMA_EXT, tmp_dentry_sector, fsbi->sec_pe…  in fat32_create()
955     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;  in fat32_mkdir()  local
982     inode->blocks = fsbi->sec_per_clus;  in fat32_mkdir()
1027 …blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_WRITE_DMA_EXT, tmp_dentry_sector, fsbi->sec_pe…  in fat32_mkdir()
1032         void *buf = kmalloc(fsbi->bytes_per_clus, 0);  in fat32_mkdir()
1034         memset((void *)new_dir_dentries, 0, fsbi->bytes_per_clus);  in fat32_mkdir()
1059         uint64_t sector = fsbi->first_data_sector + (new_dir_clus - 2) * fsbi->sec_per_clus;  in fat32_mkdir()
1061 …blk->bd_disk->fops->transfer(blk->bd_disk, AHCI_CMD_WRITE_DMA_EXT, sector, fsbi->sec_per_clus, (ui…  in fat32_mkdir()
1126     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)sb->private_sb_info;  in fat32_unlink()  local
1160     fat32_sb_info_t *fsbi = (fat32_sb_info_t *)file_ptr->dEntry->dir_inode->sb->private_sb_info;  in fat32_readdir()  local
1163     unsigned char *buf = (unsigned char *)kzalloc(fsbi->bytes_per_clus, 0);  in fat32_readdir()
1167     int clus_num = file_ptr->position / fsbi->bytes_per_clus;  in fat32_readdir()
1172         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_readdir()
1188         uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_readdir()
1192                                                          fsbi->sec_per_clus, (uint64_t)buf))  in fat32_readdir()
1204         dentry = (struct fat32_Directory_t *)(buf + file_ptr->position % fsbi->bytes_per_clus);  in fat32_readdir()
1208         for (int i = file_ptr->position % fsbi->bytes_per_clus; i < fsbi->bytes_per_clus;  in fat32_readdir()
1323         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_readdir()