57         int cluster, idx;  in fat32_alloc_clusters()  local
62             cluster = finode->first_clus;  in fat32_alloc_clusters()
72             cluster = tmp_clus;  in fat32_alloc_clusters()
75                 tmp_clus = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_alloc_clusters()
77                     cluster = tmp_clus;  in fat32_alloc_clusters()
87             fat32_write_FAT_entry(blk, fsbi, cluster, clusters[i]);  in fat32_alloc_clusters()
88             cluster = clusters[i];  in fat32_alloc_clusters()
90         fat32_write_FAT_entry(blk, fsbi, cluster, 0x0ffffff8);  in fat32_alloc_clusters()
112 int fat32_free_clusters(struct vfs_index_node_t *inode, int32_t cluster)  in fat32_free_clusters()  argument
126 uint32_t fat32_read_FAT_entry(struct block_device *blk, fat32_sb_info_t *fsbi, uint32_t cluster)  in fat32_read_FAT_entry()  argument
137 …                          fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)&buf);  in fat32_read_FAT_entry()
140     return buf[cluster & (fat_ent_per_sec - 1)] & 0x0fffffff;  in fat32_read_FAT_entry()
152 int fat32_write_FAT_entry(struct block_device *blk, fat32_sb_info_t *fsbi, uint32_t cluster, uint32…  in fat32_write_FAT_entry()  argument
160 …                           fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)buf);  in fat32_write_FAT_entry()
162 …buf[cluster & (fat_ent_per_sec - 1)] = (buf[cluster & (fat_ent_per_sec - 1)] & 0xf0000000) | (valu…  in fat32_write_FAT_entry()
165 …                           fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)buf);  in fat32_write_FAT_entry()
167 …                           fsbi->FAT2_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)buf);  in fat32_write_FAT_entry()
198     uint32_t cluster = finode->first_clus;  in fat32_find_empty_dentry()  local
207         uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_find_empty_dentry()
236             *res_cluster = cluster;  in fat32_find_empty_dentry()
242         uint64_t old_cluster = cluster;  in fat32_find_empty_dentry()
243         cluster = fat32_read_FAT_entry(blk, fsbi, cluster);  in fat32_find_empty_dentry()
244         if (cluster >= 0x0ffffff7) // 寻找完父目录的所有簇，都没有找到符合要求的空目录项  in fat32_find_empty_dentry()
249             if (fat32_alloc_clusters(parent_inode, &cluster, 1) != 0)  in fat32_find_empty_dentry()
257             sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;  in fat32_find_empty_dentry()
321 …_fill_shortname(struct vfs_dir_entry_t *dEntry, struct fat32_Directory_t *target, uint32_t cluster)  in fat32_fill_shortname()  argument
368     target->DIR_FstClusHI = (uint16_t)((cluster >> 16) & 0x0fff);  in fat32_fill_shortname()
369     target->DIR_FstClusLO = (uint16_t)(cluster & 0xffff);  in fat32_fill_shortname()