:new: 将fat32文件系统适配VFS框架

kernel/filesystem/VFS/VFS.c

@@ -11,10 +11,10 @@ static struct vfs_filesystem_type_t vfs_fs = {"filesystem", 0};
  * @param name 文件系统名
  * @param DPTE 分区表entry
  * @param DPT_type 分区表类型
- * @param buf 缓存去
+ * @param buf 文件系统的引导扇区
  * @return struct vfs_superblock_t*
  */
-struct vfs_superblock_t *vfs_mount_fs(char *name, void *DPTE, uint8_t DPT_type, void *buf)
+struct vfs_superblock_t *vfs_mount_fs(char *name, void *DPTE, uint8_t DPT_type, void *buf, int8_t ahci_ctrl_num, int8_t ahci_port_num, int8_t part_num)
 {
 
     struct vfs_filesystem_type_t *p = NULL;
@@ -22,7 +22,7 @@ struct vfs_superblock_t *vfs_mount_fs(char *name, void *DPTE, uint8_t DPT_type,
     {
         if (!strcmp(p->name, name)) // 存在符合的文件系统
         {
-            return p->read_superblock(DPTE, DPT_type, buf);
+            return p->read_superblock(DPTE, DPT_type, buf, ahci_ctrl_num, ahci_port_num, part_num);
         }
     }
     kdebug("unsupported fs: %s", name);

kernel/filesystem/VFS/VFS.h

@@ -13,17 +13,27 @@
 
 #include <common/glib.h>
 
+struct vfs_superblock_t *vfs_root_sb = NULL;
+
 #define VFS_DPT_MBR 0 // MBR分区表
 #define VFS_DPT_GPT 1 // GPT分区表
 
 #define VFS_SUCCESS 0
-#define VFS_E_FS_EXISTED 1  // 错误：文件系统已存在
-#define VFS_E_FS_NOT_EXIST 2  // 错误：文件系统不存在
+#define VFS_E_FS_EXISTED 1   // 错误：文件系统已存在
+#define VFS_E_FS_NOT_EXIST 2 // 错误：文件系统不存在
+
+/**
+ * @brief 目录项的属性
+ * 
+ */
+#define VFS_ATTR_FILE (1UL << 0)
+#define VFS_ATTR_DIR (1UL << 1)
 
 struct vfs_super_block_operations_t;
 struct vfs_inode_operations_t;
 
 struct vfs_index_node_t;
+struct vfs_dir_entry_operations_t;
 
 struct vfs_dir_entry_t
 {
@@ -34,7 +44,7 @@ struct vfs_dir_entry_t
 
     struct vfs_index_node_t *dir_inode;
     struct vfs_dir_entry_t *parent;
-    struct vfs_dir_entry_operatons_t *dir_ops;
+    struct vfs_dir_entry_operations_t *dir_ops;
 };
 
 struct vfs_superblock_t
@@ -44,10 +54,14 @@ struct vfs_superblock_t
     void *private_sb_info;
 };
 
+/**
+ * @brief inode结构体
+ *
+ */
 struct vfs_index_node_t
 {
-    uint64_t file_size;
-    uint64_t blocks;
+    uint64_t file_size; // 文件大小
+    uint64_t blocks;    // 占用的扇区数
     uint64_t attribute;
 
     struct vfs_superblock_t *sb;
@@ -71,7 +85,7 @@ struct vfs_filesystem_type_t
 {
     char *name;
     int fs_flags;
-    struct vfs_superblock_t *(*read_superblock)(void *DPTE, uint8_t DPT_type, void *buf); // 解析文件系统引导扇区的函数，为文件系统创建超级块结构。其中DPTE为磁盘分区表entry（MBR、GPT不同）
+    struct vfs_superblock_t *(*read_superblock)(void *DPTE, uint8_t DPT_type, void *buf, int8_t ahci_ctrl_num, int8_t ahci_port_num, int8_t part_num); // 解析文件系统引导扇区的函数，为文件系统创建超级块结构。其中DPTE为磁盘分区表entry（MBR、GPT不同）
     struct vfs_filesystem_type_t *next;
 };
 
@@ -117,9 +131,9 @@ struct vfs_file_operations_t
 
 /**
  * @brief 在VFS中注册文件系统
- * 
+ *
  * @param fs 文件系统类型结构体
- * @return uint64_t 
+ * @return uint64_t
  */
 uint64_t vfs_register_filesystem(struct vfs_filesystem_type_t *fs);
 uint64_t vfs_unregister_filesystem(struct vfs_filesystem_type_t *fs);
@@ -130,7 +144,7 @@ uint64_t vfs_unregister_filesystem(struct vfs_filesystem_type_t *fs);
  * @param name 文件系统名
  * @param DPTE 分区表entry
  * @param DPT_type 分区表类型
- * @param buf 缓存去
+ * @param buf 文件系统的引导扇区
  * @return struct vfs_superblock_t*
  */
-struct vfs_superblock_t *vfs_mount_fs(char *name, void *DPTE, uint8_t DPT_type, void *buf);
+struct vfs_superblock_t *vfs_mount_fs(char *name, void *DPTE, uint8_t DPT_type, void *buf, int8_t ahci_ctrl_num, int8_t ahci_port_num, int8_t part_num);

kernel/filesystem/fat32/fat32.c

@@ -5,12 +5,10 @@
 #include <process/spinlock.h>
 #include <mm/slab.h>
 
-struct fat32_partition_info_t fat32_part_info[FAT32_MAX_PARTITION_NUM] = {0};
-static int total_fat32_parts = 0;
-static int max_fat32_parts_id = -1;
-static uint64_t fat32_part_info_bmp[FAT32_MAX_PARTITION_NUM / 64 + 1] = {0};
-
-static spinlock_t fat32_part_reg_lock;
+struct vfs_super_block_operations_t fat32_sb_ops;
+struct vfs_dir_entry_operations_t fat32_dEntry_ops;
+struct vfs_file_operations_t fat32_file_ops;
+struct vfs_inode_operations_t fat32_inode_ops;
 
 /**
  * @brief 注册指定磁盘上的指定分区的fat32文件系统
@@ -19,118 +17,74 @@ static spinlock_t fat32_part_reg_lock;
  * @param ahci_port_num ahci控制器端口编号
  * @param part_num 磁盘分区编号
  *
- * @return int 全局fat32分区id
+ * @return struct vfs_super_block_t * 文件系统的超级块
  */
-int fat32_register_partition(uint8_t ahci_ctrl_num, uint8_t ahci_port_num, uint8_t part_num)
+struct vfs_superblock_t *fat32_register_partition(uint8_t ahci_ctrl_num, uint8_t ahci_port_num, uint8_t part_num)
 {
-    for (int i = 0; i <= max_fat32_parts_id; ++i)
-    {
-        if (fat32_part_info_bmp[i / 64] & (1 << (i % 64)))
-        {
-            // 已经注册
-            if (ahci_ctrl_num == fat32_part_info[i].ahci_ctrl_num && ahci_port_num == fat32_part_info[i].ahci_port_num && part_num == fat32_part_info[i].part_num)
-                return i;
-        }
-    }
-
-    // 注册分区
-    spin_lock(&fat32_part_reg_lock);
-    int current_part_id;
-    for (int i = 0; i <= max_fat32_parts_id; ++i)
-    {
-        if ((fat32_part_info_bmp[i / 64] & (1 << (i % 64))) == 0)
-        {
-            current_part_id = i;
-            break;
-        }
-    }
-    ++max_fat32_parts_id;
-    current_part_id = max_fat32_parts_id;
-    fat32_part_info_bmp[current_part_id / 64] |= (1 << (current_part_id % 64));
-    spin_unlock(&fat32_part_reg_lock);
-
-    fat32_part_info[current_part_id].ahci_ctrl_num = ahci_ctrl_num;
-    fat32_part_info[current_part_id].ahci_port_num = ahci_port_num;
-    fat32_part_info[current_part_id].part_num = part_num;
-    fat32_part_info[current_part_id].partition_id = current_part_id;
 
     struct MBR_disk_partition_table_t *DPT = MBR_read_partition_table(ahci_ctrl_num, ahci_port_num);
 
     //	for(i = 0 ;i < 512 ; i++)
     //		color_printk(PURPLE,WHITE,"%02x",buf[i]);
     printk_color(ORANGE, BLACK, "DPTE[0] start_LBA:%#018lx\ttype:%#018lx\n", DPT->DPTE[part_num].starting_LBA, DPT->DPTE[part_num].type);
+    uint8_t buf[512] = {0};
 
-    memset(buf, 0, 512);
-
+    // 读取文件系统的boot扇区
     ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, DPT->DPTE[part_num].starting_LBA, 1, (uint64_t)&buf, ahci_ctrl_num, ahci_port_num);
 
-    fat32_part_info[current_part_id].bootsector = *(struct fat32_BootSector_t *)buf;
-
-    // 计算数据区起始扇区号
-    fat32_part_info[current_part_id].first_data_sector = DPT->DPTE[part_num].starting_LBA + fat32_part_info[current_part_id].bootsector.BPB_RsvdSecCnt +
-                                                         fat32_part_info[current_part_id].bootsector.BPB_FATSz32 * fat32_part_info[current_part_id].bootsector.BPB_NumFATs;
-    // 计算FAT1的起始扇区号
-    fat32_part_info[current_part_id].FAT1_base_sector = DPT->DPTE[part_num].starting_LBA + fat32_part_info[current_part_id].bootsector.BPB_RsvdSecCnt;
-    // 计算FAT2的起始扇区号
-    fat32_part_info[current_part_id].FAT2_base_sector = fat32_part_info[current_part_id].FAT1_base_sector + fat32_part_info[current_part_id].bootsector.BPB_FATSz32;
-    // 计算每个簇的大小
-    fat32_part_info[current_part_id].bytes_per_clus = fat32_part_info[current_part_id].bootsector.BPB_BytesPerSec * fat32_part_info[current_part_id].bootsector.BPB_SecPerClus;
-
-    kdebug("fat32_part_info[current_part_id].FAT1_base_sector=%#018lx", fat32_part_info[current_part_id].FAT1_base_sector);
-    printk_color(ORANGE, BLACK, "FAT32 Boot Sector\n\tBPB_FSInfo:%#018lx\n\tBPB_BkBootSec:%#018lx\n\tBPB_TotSec32:%#018lx\n", fat32_part_info[current_part_id].bootsector.BPB_FSInfo, fat32_part_info[current_part_id].bootsector.BPB_BkBootSec, fat32_part_info[current_part_id].bootsector.BPB_TotSec32);
-
-    memset(buf, 0, 512);
-    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, DPT->DPTE[part_num].starting_LBA + fat32_part_info[current_part_id].bootsector.BPB_FSInfo, 1, (uint64_t)&buf, ahci_ctrl_num, ahci_port_num);
-
-    fat32_part_info[current_part_id].fsinfo = *(struct fat32_FSInfo_t *)buf;
-    //	for(i = 0 ;i < 512 ; i++)
-    //		printk_color(PURPLE,WHITE,"%02x",buf[i]);
-    printk_color(ORANGE, BLACK, "FAT32 FSInfo\n\tFSI_LeadSig:%#018lx\n\tFSI_StrucSig:%#018lx\n\tFSI_Free_Count:%#018lx\n", fat32_part_info[current_part_id].fsinfo.FSI_LeadSig, fat32_part_info[current_part_id].fsinfo.FSI_StrucSig, fat32_part_info[current_part_id].fsinfo.FSI_Free_Count);
-    kdebug("fat32_part_info[part_id].bootsector.BPB_RootClus = %#018lx", fat32_part_info[current_part_id].bootsector.BPB_RootClus);
-    return current_part_id;
+    // 挂载文件系统到vfs
+    return vfs_mount_fs("FAT32", (void *)(&DPT->DPTE[part_num]), VFS_DPT_MBR, buf, ahci_ctrl_num, ahci_port_num, part_num);
 }
 
 /**
  * @brief 读取指定簇的FAT表项
  *
- * @param part_id 分区id
- * @param cluster
+ * @param fsbi fat32超级块私有信息结构体
+ * @param cluster 指定簇
  * @return uint32_t 下一个簇的簇号
  */
-uint32_t fat32_read_FAT_entry(uint32_t part_id, uint32_t cluster)
+uint32_t fat32_read_FAT_entry(fat32_sb_info_t *fsbi, uint32_t cluster)
 {
-
-    uint32_t fat_ent_per_sec = (fat32_part_info[part_id].bootsector.BPB_BytesPerSec >> 2); // 该值应为2的n次幂
+    // 计算每个扇区内含有的FAT表项数
+    // FAT每项4bytes
+    uint32_t fat_ent_per_sec = (fsbi->bootsector.BPB_BytesPerSec >> 2); // 该值应为2的n次幂
     uint32_t buf[256];
-    memset(buf, 0, fat32_part_info[part_id].bootsector.BPB_BytesPerSec);
+    memset(buf, 0, fsbi->bootsector.BPB_BytesPerSec);
 
-    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, fat32_part_info[part_id].FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)&buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
+    // 读取一个sector的数据，
+    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1,
+                            (uint64_t)&buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
 
-    uint32_t ret = buf[cluster & (fat_ent_per_sec - 1)] & 0x0fffffff;
-
-    return ret;
+    // 返回下一个fat表项的值（也就是下一个cluster）
+    return buf[cluster & (fat_ent_per_sec - 1)] & 0x0fffffff;
+    ;
 }
 
 /**
  * @brief 写入指定簇的FAT表项
  *
- * @param part_id 分区id
- * @param cluster
+ * @param fsbi fat32超级块私有信息结构体
+ * @param cluster 指定簇
  * @param value 要写入该fat表项的值
- * @return uint32_t 下一个簇的簇号
+ * @return uint32_t errcode
  */
-uint32_t fat32_write_FAT_entry(uint32_t part_id, uint32_t cluster, uint32_t value)
+uint32_t fat32_write_FAT_entry(fat32_sb_info_t *fsbi, uint32_t cluster, uint32_t value)
 {
-    uint32_t fat_ent_per_sec = (fat32_part_info[part_id].bootsector.BPB_BytesPerSec >> 2); // 该值应为2的n次幂
+    // 计算每个扇区内含有的FAT表项数
+    // FAT每项4bytes
+    uint32_t fat_ent_per_sec = (fsbi->bootsector.BPB_BytesPerSec >> 2); // 该值应为2的n次幂
     uint32_t buf[256];
-    memset(buf, 0, fat32_part_info[part_id].bootsector.BPB_BytesPerSec);
+    memset(buf, 0, fsbi->bootsector.BPB_BytesPerSec);
 
-    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, fat32_part_info[part_id].FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)&buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
+    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1,
+                            (uint64_t)&buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
 
     buf[cluster & (fat_ent_per_sec - 1)] = (buf[cluster & (fat_ent_per_sec - 1)] & 0xf0000000) | (value & 0x0fffffff);
     // 向FAT1和FAT2写入数据
-    ahci_operation.transfer(ATA_CMD_WRITE_DMA_EXT, fat32_part_info[part_id].FAT1_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)&buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
-    ahci_operation.transfer(ATA_CMD_WRITE_DMA_EXT, fat32_part_info[part_id].FAT2_base_sector + (cluster / fat_ent_per_sec), 1, (uint64_t)&buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
+    ahci_operation.transfer(ATA_CMD_WRITE_DMA_EXT, fsbi->FAT1_base_sector + (cluster / fat_ent_per_sec), 1,
+                            (uint64_t)&buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
+    ahci_operation.transfer(ATA_CMD_WRITE_DMA_EXT, fsbi->FAT2_base_sector + (cluster / fat_ent_per_sec), 1,
+                            (uint64_t)&buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
 
     return 0;
 }
@@ -138,42 +92,41 @@ uint32_t fat32_write_FAT_entry(uint32_t part_id, uint32_t cluster, uint32_t valu
 /**
  * @brief 在父目录中寻找指定的目录项
  *
- * @param part_id 分区id
- * @param name 目录项名字
- * @param name_len 目录项名字长度
- * @param dentry 父目录
- * @param flags
- * @return struct fat32_Directory_t* 目标目录项
+ * @param parent_inode 父目录项的inode
+ * @param dest_inode 搜索目标目录项的inode
+ * @return struct vfs_dir_entry_t* 目标目录项
  */
-struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_len, struct fat32_Directory_t *dentry, int flags)
+struct vfs_dir_entry_t *fat32_lookup(struct vfs_index_node_t *parent_inode, struct vfs_dir_entry_t *dest_dentry)
 {
     int errcode = 0;
-    uint8_t *buf = kmalloc(fat32_part_info[part_id].bytes_per_clus, 0);
-    memset(buf, 0, fat32_part_info[part_id].bytes_per_clus);
+
+    struct fat32_inode_info_t *finode = (struct fat32_inode_info_t *)parent_inode->private_inode_info;
+    fat32_sb_info_t *fsbi = (fat32_sb_info_t *)parent_inode->sb->private_sb_info;
+
+    uint8_t *buf = kmalloc(fsbi->bytes_per_clus, 0);
+    memset(buf, 0, fsbi->bytes_per_clus);
 
     // 计算父目录项的起始簇号
-    uint32_t cluster = ((dentry->DIR_FstClusHI << 16) | (dentry->DIR_FstClusLO)) & 0x0fffffff;
-    /*
-    kdebug("dentry->DIR_FstClusHI=%#010lx", dentry->DIR_FstClusHI);
-    kdebug("dentry->DIR_FstClusLo=%#010lx", dentry->DIR_FstClusLO);
-    kdebug("cluster=%#010lx", cluster);
-    */
+    uint32_t cluster = finode->first_clus;
+
+    struct fat32_Directory_t *tmp_dEntry = NULL;
+
     while (true)
     {
 
         // 计算父目录项的起始LBA扇区号
-        uint64_t sector = fat32_part_info[part_id].first_data_sector + (cluster - 2) * fat32_part_info[part_id].bootsector.BPB_SecPerClus;
-        //kdebug("fat32_part_info[part_id].bootsector.BPB_SecPerClus=%d",fat32_part_info[part_id].bootsector.BPB_SecPerClus);
-        //kdebug("sector=%d",sector);
+        uint64_t sector = fsbi->first_data_sector + (cluster - 2) * fsbi->sec_per_clus;
+        // kdebug("fat32_part_info[part_id].bootsector.BPB_SecPerClus=%d",fat32_part_info[part_id].bootsector.BPB_SecPerClus);
+        // kdebug("sector=%d",sector);
 
         // 读取父目录项的起始簇数据
-        ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, sector, fat32_part_info[part_id].bootsector.BPB_SecPerClus, (uint64_t)buf, 0, 0);
-        //ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, sector, fat32_part_info[part_id].bootsector.BPB_SecPerClus, (uint64_t)buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
+        ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, sector, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
+        // ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, sector, fat32_part_info[part_id].bootsector.BPB_SecPerClus, (uint64_t)buf, fat32_part_info[part_id].ahci_ctrl_num, fat32_part_info[part_id].ahci_port_num);
 
-        struct fat32_Directory_t *tmp_dEntry = (struct fat32_Directory_t *)buf;
+        tmp_dEntry = (struct fat32_Directory_t *)buf;
 
         // 查找短目录项
-        for (int i = 0; i < fat32_part_info[part_id].bytes_per_clus; i += 32, ++tmp_dEntry)
+        for (int i = 0; i < fsbi->bytes_per_clus; i += 32, ++tmp_dEntry)
         {
             // 跳过长目录项
             if (tmp_dEntry->DIR_Attr == ATTR_LONG_NAME)
@@ -193,36 +146,33 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                 // 比较name1
                 for (int x = 0; x < 5; ++x)
                 {
-                    if (js > name_len && tmp_ldEntry->LDIR_Name1[x] == 0xffff)
+                    if (js > dest_dentry->name_length && tmp_ldEntry->LDIR_Name1[x] == 0xffff)
                         continue;
-                    else if (js > name_len || tmp_ldEntry->LDIR_Name1[x] != (uint16_t)(name[js++])) // 文件名不匹配，检索下一个短目录项
+                    else if (js > dest_dentry->name_length || tmp_ldEntry->LDIR_Name1[x] != (uint16_t)(dest_dentry->name[js++])) // 文件名不匹配，检索下一个短目录项
                         goto continue_cmp_fail;
                 }
 
                 // 比较name2
                 for (int x = 0; x < 6; ++x)
                 {
-                    if (js > name_len && tmp_ldEntry->LDIR_Name2[x] == 0xffff)
+                    if (js > dest_dentry->name_length && tmp_ldEntry->LDIR_Name2[x] == 0xffff)
                         continue;
-                    else if (js > name_len || tmp_ldEntry->LDIR_Name2[x] != (uint16_t)(name[js++])) // 文件名不匹配，检索下一个短目录项
+                    else if (js > dest_dentry->name_length || tmp_ldEntry->LDIR_Name2[x] != (uint16_t)(dest_dentry->name[js++])) // 文件名不匹配，检索下一个短目录项
                         goto continue_cmp_fail;
                 }
 
                 // 比较name3
                 for (int x = 0; x < 2; ++x)
                 {
-                    if (js > name_len && tmp_ldEntry->LDIR_Name3[x] == 0xffff)
+                    if (js > dest_dentry->name_length && tmp_ldEntry->LDIR_Name3[x] == 0xffff)
                         continue;
-                    else if (js > name_len || tmp_ldEntry->LDIR_Name3[x] != (uint16_t)(name[js++])) // 文件名不匹配，检索下一个短目录项
+                    else if (js > dest_dentry->name_length || tmp_ldEntry->LDIR_Name3[x] != (uint16_t)(dest_dentry->name[js++])) // 文件名不匹配，检索下一个短目录项
                         goto continue_cmp_fail;
                 }
 
-                if (js >= name_len) // 找到需要的目录项，返回
+                if (js >= dest_dentry->name_length) // 找到需要的目录项，返回
                 {
-                    struct fat32_Directory_t *p = (struct fat32_Directory_t *)kmalloc(sizeof(struct fat32_Directory_t), 0);
-                    *p = *tmp_dEntry;
-                    kfree(buf);
-                    return p;
+                    goto find_lookup_success;
                 }
 
                 --tmp_ldEntry; // 检索下一个长目录项
@@ -237,9 +187,9 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                 case ' ':
                     if (!(tmp_dEntry->DIR_Attr & ATTR_DIRECTORY)) // 不是文件夹（是文件）
                     {
-                        if (name[js] == '.')
+                        if (dest_dentry->name[js] == '.')
                             continue;
-                        else if (tmp_dEntry->DIR_Name[x] == name[js])
+                        else if (tmp_dEntry->DIR_Name[x] == dest_dentry->name[js])
                         {
                             ++js;
                             break;
@@ -249,12 +199,12 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                     }
                     else // 是文件夹
                     {
-                        if (js < name_len && tmp_dEntry->DIR_Name[x] == name[js]) // 当前位正确匹配
+                        if (js < dest_dentry->name_length && tmp_dEntry->DIR_Name[x] == dest_dentry->name[js]) // 当前位正确匹配
                         {
                             ++js;
                             break; // 进行下一位的匹配
                         }
-                        else if (js == name_len)
+                        else if (js == dest_dentry->name_length)
                             continue;
                         else
                             goto continue_cmp_fail;
@@ -266,7 +216,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                 case 'a' ... 'z':
                     if (tmp_dEntry->DIR_NTRes & LOWERCASE_BASE) // 为兼容windows系统，检测DIR_NTRes字段
                     {
-                        if (js < name_len && (tmp_dEntry->DIR_Name[x] + 32 == name[js]))
+                        if (js < dest_dentry->name_length && (tmp_dEntry->DIR_Name[x] + 32 == dest_dentry->name[js]))
                         {
                             ++js;
                             break;
@@ -276,7 +226,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                     }
                     else
                     {
-                        if (js < name_len && tmp_dEntry->DIR_Name[x] == name[js])
+                        if (js < dest_dentry->name_length && tmp_dEntry->DIR_Name[x] == dest_dentry->name[js])
                         {
                             ++js;
                             break;
@@ -286,7 +236,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                     }
                     break;
                 case '0' ... '9':
-                    if (js < name_len && tmp_dEntry->DIR_Name[x] == name[js])
+                    if (js < dest_dentry->name_length && tmp_dEntry->DIR_Name[x] == dest_dentry->name[js])
                     {
                         ++js;
                         break;
@@ -314,7 +264,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                     case 'a' ... 'z':
                         if (tmp_dEntry->DIR_NTRes & LOWERCASE_EXT) // 为兼容windows系统，检测DIR_NTRes字段
                         {
-                            if ((tmp_dEntry->DIR_Name[x] + 32 == name[js]))
+                            if ((tmp_dEntry->DIR_Name[x] + 32 == dest_dentry->name[js]))
                             {
                                 ++js;
                                 break;
@@ -324,7 +274,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                         }
                         else
                         {
-                            if (tmp_dEntry->DIR_Name[x] == name[js])
+                            if (tmp_dEntry->DIR_Name[x] == dest_dentry->name[js])
                             {
                                 ++js;
                                 break;
@@ -335,7 +285,7 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                         break;
                     case '0' ... '9':
                     case ' ':
-                        if (tmp_dEntry->DIR_Name[x] == name[js])
+                        if (tmp_dEntry->DIR_Name[x] == dest_dentry->name[js])
                         {
                             ++js;
                             break;
@@ -351,15 +301,12 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
                     }
                 }
             }
-            struct fat32_Directory_t *p = (struct fat32_Directory_t *)kmalloc(sizeof(struct fat32_Directory_t), 0);
-            *p = *tmp_dEntry;
-            kfree(buf);
-            return p;
+            goto find_lookup_success;
         continue_cmp_fail:;
         }
 
         // 当前簇没有发现目标文件名，寻找下一个簇
-        cluster = fat32_read_FAT_entry(part_id, cluster);
+        cluster = fat32_read_FAT_entry(fsbi, cluster);
 
         if (cluster >= 0x0ffffff7) // 寻找完父目录的所有簇，都没有找到目标文件名
         {
@@ -367,6 +314,34 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
             return NULL;
         }
     }
+find_lookup_success:; // 找到目标dentry
+    struct vfs_index_node_t *p = (struct vfs_index_node_t *)kmalloc(sizeof(struct vfs_index_node_t), 0);
+    memset(p, 0, sizeof(struct vfs_index_node_t));
+
+    p->file_size = tmp_dEntry->DIR_FileSize;
+    // 计算文件占用的扇区数, 由于最小存储单位是簇，因此需要按照簇的大小来对齐扇区
+    p->blocks = (p->file_size + fsbi->bytes_per_clus - 1) / fsbi->bytes_per_sec;
+    p->attribute = (tmp_dEntry->DIR_Attr & ATTR_DIRECTORY) ? VFS_ATTR_DIR : VFS_ATTR_FILE;
+    p->sb = parent_inode->sb;
+    p->file_ops = &fat32_file_ops;
+    p->inode_ops = &fat32_inode_ops;
+
+    // 为inode的与文件系统相关的信息结构体分配空间
+    p->private_inode_info = (void *)kmalloc(sizeof(fat32_inode_info_t), 0);
+    memset(p->private_inode_info, 0, sizeof(fat32_inode_info_t));
+    finode = (fat32_inode_info_t *)p->private_inode_info;
+
+    finode->first_clus = ((tmp_dEntry->DIR_FstClusHI << 16) | tmp_dEntry->DIR_FstClusLO) & 0x0fffffff;
+    finode->dEntry_location_clus = cluster;
+    finode->dEntry_location_clus_offset = tmp_dEntry - (struct fat32_Directory_t *)buf; //计算dentry的偏移量
+    finode->create_date = tmp_dEntry->DIR_CrtDate;
+    finode->create_time = tmp_dEntry->DIR_CrtTime;
+    finode->write_date = tmp_dEntry->DIR_WrtDate;
+    finode->write_time = tmp_dEntry->DIR_WrtTime;
+
+    dest_dentry->dir_inode = p;
+    kfree(buf);
+    return dest_dentry;
 }
 
 /**
@@ -374,26 +349,21 @@ struct fat32_Directory_t *fat32_lookup(uint32_t part_id, char *name, int name_le
  *
  * @param part_id fat32分区id
  * @param path
- * @param flags
- * @return struct fat32_Directory_t*
+ * @param flags 1：返回父目录项， 0：返回结果目录项
+ * @return struct vfs_dir_entry_t* 目录项
  */
-struct fat32_Directory_t *fat32_path_walk(uint32_t part_id, char *path, uint64_t flags)
+struct vfs_dir_entry_t *fat32_path_walk(char *path, uint64_t flags)
 {
+
+    struct vfs_dir_entry_t *parent = vfs_root_sb->root;
     // 去除路径前的斜杠
     while (*path == '/')
         ++path;
 
     if ((!*path) || (*path == '\0'))
-        return NULL;
-
-    struct fat32_Directory_t *parent = (struct fat32_Directory_t *)kmalloc(sizeof(struct fat32_Directory_t), 0);
-    char *dEntry_name = kmalloc(PAGE_4K_SIZE, 0);
+        return parent;
 
-    memset(parent, 0, sizeof(struct fat32_Directory_t));
-    memset(dEntry_name, 0, PAGE_4K_SIZE);
-
-    parent->DIR_FstClusLO = fat32_part_info[part_id].bootsector.BPB_RootClus & 0xffff;
-    parent->DIR_FstClusHI = (fat32_part_info[part_id].bootsector.BPB_RootClus >> 16) & 0xffff;
+    struct vfs_dir_entry_t *dentry;
 
     while (true)
     {
@@ -402,43 +372,336 @@ struct fat32_Directory_t *fat32_path_walk(uint32_t part_id, char *path, uint64_t
         while ((*path && *path != '\0') && (*path != '/'))
             ++path;
         int tmp_path_len = path - tmp_path;
-        memcpy(dEntry_name, tmp_path, tmp_path_len);
-        dEntry_name[tmp_path_len] = '\0';
-        //kdebug("dEntry_name=%s", dEntry_name);
-        struct fat32_Directory_t *next_dir = fat32_lookup(part_id, dEntry_name, tmp_path_len, parent, flags);
 
-        if (next_dir == NULL)
+        dentry = (struct vfs_dir_entry_t *)kmalloc(sizeof(struct vfs_dir_entry_t), 0);
+        memset(dentry, 0, sizeof(struct vfs_dir_entry_t));
+        // 为目录项的名称分配内存
+        dentry->name = (char *)kmalloc(tmp_path_len + 1, 0);
+        // 貌似这里不需要memset，因为空间会被覆盖
+        // memset(dentry->name, 0, tmp_path_len+1);
+
+        memcpy(dentry->name, tmp_path, tmp_path_len);
+        dentry->name[tmp_path_len] = '\0';
+        dentry->name_length = tmp_path_len;
+
+        if (parent->dir_inode->inode_ops->lookup(parent->dir_inode, dentry) == NULL)
         {
             // 搜索失败
-            kerror("cannot find the file/dir : %s", dEntry_name);
-            kfree(dEntry_name);
-            kfree(parent);
+            kerror("cannot find the file/dir : %s", dentry->name);
+            kfree(dentry->name);
+            kfree(dentry);
             return NULL;
         }
+        // 找到子目录项
+        // 初始化子目录项的entry
+        list_init(&dentry->child_node_list);
+        list_init(&dentry->subdirs_list);
+        dentry->parent = parent;
 
         while (*path == '/')
             ++path;
 
         if ((!*path) || (*path == '\0')) //  已经到达末尾
         {
-            if (flags & 1)  // 返回父目录
+            if (flags & 1) // 返回父目录
             {
-                kfree(dEntry_name);
-                kfree(next_dir);
                 return parent;
             }
 
-            kfree(dEntry_name);
-            kfree(parent);
-            return next_dir;
+            return dentry;
         }
 
-        *parent = *next_dir;
-        kfree(next_dir);
+        parent = dentry;
     }
 }
 
+/**
+ * @brief 创建fat32文件系统的超级块
+ *
+ * @param DPTE 磁盘分区表entry
+ * @param DPT_type 磁盘分区表类型
+ * @param buf fat32文件系统的引导扇区
+ * @return struct vfs_superblock_t* 创建好的超级块
+ */
+struct vfs_superblock_t *fat32_read_superblock(void *DPTE, uint8_t DPT_type, void *buf, int8_t ahci_ctrl_num, int8_t ahci_port_num, int8_t part_num)
+{
+    if (DPT_type != VFS_DPT_MBR) // 暂时只支持MBR分区表
+    {
+        kerror("fat32_read_superblock(): Unsupported DPT!");
+        return NULL;
+    }
+
+    // 分配超级块的空间
+    struct vfs_superblock_t *sb_ptr = (struct vfs_superblock_t *)kmalloc(sizeof(struct vfs_superblock_t), 0);
+    memset(sb_ptr, 0, sizeof(struct vfs_superblock_t));
+
+    sb_ptr->sb_ops = &fat32_sb_ops;
+    sb_ptr->private_sb_info = kmalloc(sizeof(fat32_sb_info_t), 0);
+    memset(sb_ptr->private_sb_info, 0, sizeof(fat32_sb_info_t));
+
+    struct fat32_BootSector_t *fbs = (struct fat32_BootSector_t *)buf;
+
+    fat32_sb_info_t *fsbi = (fat32_sb_info_t *)(sb_ptr->private_sb_info);
+
+    // MBR分区表entry
+    struct MBR_disk_partition_table_entry_t *MBR_DPTE = (struct MBR_disk_partition_table_entry_t *)DPTE;
+    fsbi->ahci_ctrl_num = ahci_ctrl_num;
+    fsbi->ahci_port_num = ahci_port_num;
+    fsbi->part_num = part_num;
+
+    fsbi->starting_sector = MBR_DPTE->starting_LBA;
+    fsbi->sector_count = MBR_DPTE->total_sectors;
+    fsbi->sec_per_clus = fbs->BPB_SecPerClus;
+    fsbi->bytes_per_clus = fbs->BPB_SecPerClus * fbs->BPB_BytesPerSec;
+    fsbi->bytes_per_sec = fbs->BPB_BytesPerSec;
+    fsbi->first_data_sector = MBR_DPTE->starting_LBA + fbs->BPB_RsvdSecCnt + fbs->BPB_FATSz32 * fbs->BPB_NumFATs;
+    fsbi->FAT1_base_sector = MBR_DPTE->starting_LBA + fbs->BPB_RsvdSecCnt;
+    fsbi->FAT2_base_sector = fsbi->FAT1_base_sector + fbs->BPB_FATSz32;
+    fsbi->sec_per_FAT = fbs->BPB_FATSz32;
+    fsbi->NumFATs = fbs->BPB_NumFATs;
+    fsbi->fsinfo_sector_addr_infat = fbs->BPB_FSInfo;
+    fsbi->bootsector_bak_sector_addr_infat = fbs->BPB_BkBootSec;
+
+    printk_color(ORANGE, BLACK, "FAT32 Boot Sector\n\tBPB_FSInfo:%#018lx\n\tBPB_BkBootSec:%#018lx\n\tBPB_TotSec32:%#018lx\n", fbs->BPB_FSInfo, fbs->BPB_BkBootSec, fbs->BPB_TotSec32);
+
+    // fsinfo扇区的信息
+    memset(&fsbi->fsinfo, 0, sizeof(struct fat32_FSInfo_t));
+    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, MBR_DPTE->starting_LBA + fbs->BPB_FSInfo, 1, (uint64_t)&fsbi->fsinfo, ahci_ctrl_num, ahci_port_num);
+    printk_color(BLUE, BLACK, "FAT32 FSInfo\n\tFSI_LeadSig:%#018lx\n\tFSI_StrucSig:%#018lx\n\tFSI_Free_Count:%#018lx\n", fsbi->fsinfo.FSI_LeadSig, fsbi->fsinfo.FSI_StrucSig, fsbi->fsinfo.FSI_Free_Count);
+
+    // 初始化超级块的dir entry
+    sb_ptr->root = (struct vfs_dir_entry_t *)kmalloc(sizeof(struct vfs_dir_entry_t), 0);
+    memset(sb_ptr->root, 0, sizeof(struct vfs_dir_entry_t));
+
+    list_init(&sb_ptr->root->child_node_list);
+    list_init(&sb_ptr->root->subdirs_list);
+
+    sb_ptr->root->parent = sb_ptr->root;
+    sb_ptr->root->dir_ops = &fat32_dEntry_ops;
+    // 分配2个字节的name
+    sb_ptr->root->name = (char *)(kmalloc(2, 0));
+    sb_ptr->root->name[0] = '/';
+    sb_ptr->root->name_length = 1;
+
+    // 为root目录项分配index node
+    sb_ptr->root->dir_inode = (struct vfs_index_node_t *)kmalloc(sizeof(struct vfs_index_node_t), 0);
+    memset(sb_ptr->root->dir_inode, 0, sizeof(struct vfs_index_node_t));
+    sb_ptr->root->dir_inode->inode_ops = &fat32_inode_ops;
+    sb_ptr->root->dir_inode->file_ops = &fat32_file_ops;
+    sb_ptr->root->dir_inode->file_size = 0;
+    // 计算文件占用的扇区数, 由于最小存储单位是簇，因此需要按照簇的大小来对齐扇区
+    sb_ptr->root->dir_inode->blocks = (sb_ptr->root->dir_inode->file_size + fsbi->bytes_per_clus - 1) / fsbi->bytes_per_sec;
+    sb_ptr->root->dir_inode->attribute = VFS_ATTR_DIR;
+    sb_ptr->root->dir_inode->sb = sb_ptr; // 反向绑定对应的超级块
+
+    // 初始化inode信息
+    sb_ptr->root->dir_inode->private_inode_info = kmalloc(sizeof(struct fat32_inode_info_t), 0);
+    memset(sb_ptr->root->dir_inode->private_inode_info, 0, sizeof(struct fat32_inode_info_t));
+    struct fat32_inode_info_t *finode = (struct fat32_inode_info_t *)sb_ptr->root->dir_inode->private_inode_info;
+
+    finode->first_clus = fbs->BPB_RootClus;
+    finode->dEntry_location_clus = 0;
+    finode->dEntry_location_clus_offset = 0;
+    finode->create_time = 0;
+    finode->create_date = 0;
+    finode->write_date = 0;
+    finode->write_time;
+
+    return sb_ptr;
+}
+
+/**
+ * @brief todo: 写入superblock
+ *
+ * @param sb
+ */
+void fat32_write_superblock(struct vfs_superblock_t *sb)
+{
+}
+
+/**
+ * @brief 释放superblock的内存空间
+ *
+ * @param sb 要被释放的superblock
+ */
+void fat32_put_superblock(struct vfs_superblock_t *sb)
+{
+    kfree(sb->private_sb_info);
+    kfree(sb->root->dir_inode->private_inode_info);
+    kfree(sb->root->dir_inode);
+    kfree(sb->root);
+    kfree(sb);
+}
+
+/**
+ * @brief 写入inode到硬盘上
+ *
+ * @param inode
+ */
+void fat32_write_inode(struct vfs_index_node_t *inode)
+{
+    fat32_inode_info_t *finode = inode->private_inode_info;
+
+    if (finode->dEntry_location_clus == 0)
+    {
+        kerror("FAT32 error: Attempt to write the root inode");
+        return;
+    }
+
+    fat32_sb_info_t *fsbi = (fat32_sb_info_t *)inode->sb->private_sb_info;
+
+    // 计算目标inode对应数据区的LBA地址
+    uint64_t fLBA = fsbi->first_data_sector + (finode->dEntry_location_clus - 2) * fsbi->sec_per_clus;
+
+    uint8_t *buf = (uint8_t *)kmalloc(fsbi->bytes_per_clus, 0);
+    memset(buf, 0, sizeof(fsbi->bytes_per_clus));
+    ahci_operation.transfer(ATA_CMD_READ_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
+
+    // 计算目标dEntry所在的位置
+    struct fat32_Directory_t *fdEntry = (struct fat32_Directory_t *)((uint64_t)buf + finode->dEntry_location_clus_offset);
+
+    // 写入fat32文件系统的dir_entry
+    fdEntry->DIR_FileSize = inode->file_size;
+    fdEntry->DIR_FstClusLO = finode->first_clus & 0xffff;
+    fdEntry->DIR_FstClusHI = (finode->first_clus >> 16) | (fdEntry->DIR_FstClusHI & 0xf000);
+
+    // 将dir entry写回磁盘
+    ahci_operation.transfer(ATA_CMD_WRITE_DMA_EXT, fLBA, fsbi->sec_per_clus, (uint64_t)buf, fsbi->ahci_ctrl_num, fsbi->ahci_port_num);
+
+    kfree(buf);
+}
+
+struct vfs_super_block_operations_t fat32_sb_ops =
+    {
+        .write_superblock = fat32_write_superblock,
+        .put_superblock = fat32_put_superblock,
+        .write_inode = fat32_write_inode,
+};
+
+// todo: compare
+long fat32_compare(struct vfs_dir_entry_t *parent_dEntry, char *source_filename, char *dest_filename)
+{
+}
+// todo: hash
+long fat32_hash(struct vfs_dir_entry_t *dEntry, char *filename)
+{
+}
+// todo: release
+long fat32_release(struct vfs_dir_entry_t *dEntry)
+{
+}
+// todo: iput
+long fat32_iput(struct vfs_dir_entry_t *dEntry, struct vfs_index_node_t *inode)
+{
+}
+
+/**
+ * @brief fat32文件系统对于dEntry的操作
+ *
+ */
+struct vfs_dir_entry_operations_t fat32_dEntry_ops =
+    {
+        .compare = fat32_compare,
+        .hash = fat32_hash,
+        .release = fat32_release,
+        .iput = fat32_iput,
+};
+
+// todo: open
+long fat32_open(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr)
+{
+}
+
+// todo: close
+long fat32_close(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr)
+{
+}
+
+// todo: read
+long fat32_read(struct vfs_file_t *file_ptr, char *buf, uint64_t buf_size, long *position)
+{
+}
+// todo: write
+long fat32_write(struct vfs_file_t *file_ptr, char *buf, uint64_t buf_size, long *position)
+{
+}
+// todo: lseek
+long fat32_lseek(struct vfs_file_t *file_ptr, long offset, long origin)
+{
+}
+// todo: ioctl
+long fat32_ioctl(struct vfs_index_node_t *inode, struct vfs_file_t *file_ptr, uint64_t cmd, uint64_t arg)
+{
+}
+
+/**
+ * @brief fat32文件系统，关于文件的操作
+ *
+ */
+struct vfs_file_operations_t fat32_file_ops =
+    {
+        .open = fat32_open,
+        .close = fat32_close,
+        .read = fat32_read,
+        .write = fat32_write,
+        .lseek = fat32_lseek,
+        .ioctl = fat32_ioctl,
+};
+
+// todo: create
+long fat32_create(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *dentry, int mode)
+{
+}
+
+// todo: mkdir
+int64_t fat32_mkdir(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *dEntry, int mode)
+{
+}
+
+// todo: rmdir
+int64_t fat32_rmdir(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *dEntry)
+{
+}
+
+// todo: rename
+int64_t fat32_rename(struct vfs_index_node_t *old_inode, struct vfs_dir_entry_t *old_dEntry, struct vfs_index_node_t *new_inode, struct vfs_dir_entry_t *new_dEntry)
+{
+}
+
+// todo: getAttr
+int64_t fat32_getAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr)
+{
+}
+
+// todo: setAttr
+int64_t fat32_setAttr(struct vfs_dir_entry_t *dEntry, uint64_t *attr)
+{
+}
+
+struct vfs_inode_operations_t fat32_inode_ops =
+    {
+        .create = fat32_create,
+        .mkdir = fat32_mkdir,
+        .rmdir = fat32_rmdir,
+        .lookup = fat32_lookup,
+        .rename = fat32_rename,
+        .getAttr = fat32_getAttr,
+        .setAttr = fat32_setAttr,
+
+};
+
+struct vfs_filesystem_type_t fat32_fs_type = 
+{
+    .name = "FAT32",
+    .fs_flags = 0,
+    .read_superblock = fat32_read_superblock,
+    .next = NULL,
+};
 void fat32_init()
 {
-    spin_init(&fat32_part_reg_lock);
+    // 在VFS中注册fat32文件系统
+    vfs_register_filesystem(&fat32_fs_type);
+
+    // 挂载根文件系统
+    vfs_root_sb = fat32_register_partition(0, 0, 0);
 }

kernel/filesystem/fat32/fat32.h

@@ -12,6 +12,7 @@
 #pragma once
 
 #include <filesystem/MBR.h>
+#include <filesystem/VFS/VFS.h>
 
 #define FAT32_MAX_PARTITION_NUM 128 // 系统支持的最大的fat32分区数量
 
@@ -120,6 +121,10 @@ struct fat32_LongDirectory_t
     unsigned short LDIR_Name3[2];  // 长文件名的12-13个字符，每个字符占2bytes
 } __attribute__((packed));
 
+/**
+ * @brief fat32文件系统的超级块信息结构体
+ *
+ */
 struct fat32_partition_info_t
 {
     uint16_t partition_id; // 全局fat32分区id
@@ -167,18 +172,30 @@ typedef struct fat32_inode_info_t fat32_inode_info_t;
  *
  * @param ahci_ctrl_num ahci控制器编号
  * @param ahci_port_num ahci控制器端口编号
- * @param part_num 磁盘分区编号
+ * @return struct vfs_super_block_t * 文件系统的超级块
  */
-int fat32_register_partition(uint8_t ahci_ctrl_num, uint8_t ahci_port_num, uint8_t part_num);
+struct vfs_superblock_t *fat32_register_partition(uint8_t ahci_ctrl_num, uint8_t ahci_port_num, uint8_t part_num);
 
 /**
  * @brief 按照路径查找文件
  *
  * @param part_id fat32分区id
  * @param path
- * @param flags
- * @return struct fat32_Directory_t*
+ * @param flags 1：返回父目录项， 0：返回结果目录项
+ * @return struct vfs_dir_entry_t* 目录项
+ */
+struct vfs_dir_entry_t *fat32_path_walk(char *path, uint64_t flags);
+
+/**
+ * @brief 创建fat32文件系统的超级块
+ *
+ * @param DPTE 磁盘分区表entry
+ * @param DPT_type 磁盘分区表类型
+ * @param buf fat32文件系统的引导扇区
+ * @return struct vfs_superblock_t* 创建好的超级块
  */
-struct fat32_Directory_t *fat32_path_walk(uint32_t part_id, char *path, uint64_t flags);
+struct vfs_superblock_t *fat32_read_superblock(void *DPTE, uint8_t DPT_type, void *buf, int8_t ahci_ctrl_num, int8_t ahci_port_num, int8_t part_num);
+
+long fat32_create(struct vfs_index_node_t *inode, struct vfs_dir_entry_t *dentry, int mode);
 
 void fat32_init();

kernel/main.c

@@ -132,7 +132,8 @@ void system_initialize()
     irq_init();
 
     softirq_init();
-
+    current_pcb->cpu_id = 0;
+    current_pcb->preempt_count = 0;
     // 先初始化系统调用模块
     syscall_init();
     //  再初始化进程模块。顺序不能调转
@@ -147,15 +148,16 @@ void system_initialize()
     // ata_init();
     pci_init();
     ahci_init();
-    fat32_init();
+
     // test_slab();
     // test_mm();
 
     // process_init();
-    current_pcb->cpu_id = 0;
-    current_pcb->preempt_count = 0;
+
     process_init();
     HPET_init();
+    fat32_init();
+
 }
 
 //操作系统内核从这里开始执行
@@ -182,18 +184,18 @@ void Start_Kernel(void)
 
     system_initialize();
 
-    int part_id = fat32_register_partition(0, 0, 0);
-    struct fat32_Directory_t *dentry = fat32_path_walk(part_id, "a.txt", 0);
+    // int part_id = fat32_register_partition(0, 0, 0);
+    struct vfs_dir_entry_t *dentry = fat32_path_walk("a.txt", 0);
     if (dentry != NULL)
-        printk_color(BLUE, BLACK, "Find a.txt\nDIR_FstClusHI:%#018lx\tDIR_FstClusLO:%#018lx\tDIR_FileSize:%#018lx\n", dentry->DIR_FstClusHI, dentry->DIR_FstClusLO, dentry->DIR_FileSize);
+        printk_color(ORANGE, BLACK, "Find a.txt\nDIR_FstClus:%#018lx\tDIR_FileSize:%#018lx\n", ((struct fat32_inode_info_t *)(dentry->dir_inode->private_inode_info))->first_clus, dentry->dir_inode->file_size);
     else
-        printk_color(BLUE, BLACK, "Can`t find file\n");
-    
-    dentry = fat32_path_walk(part_id, "xx/12.png", 0);
+        printk_color(ORANGE, BLACK, "Can`t find file\n");
+
+    dentry = fat32_path_walk("xx/12.png", 0);
     if (dentry != NULL)
-        printk_color(BLUE, BLACK, "Find xx/12.png\nDIR_FstClusHI:%#018lx\tDIR_FstClusLO:%#018lx\tDIR_FileSize:%#018lx\n", dentry->DIR_FstClusHI, dentry->DIR_FstClusLO, dentry->DIR_FileSize);
+        printk_color(ORANGE, BLACK, "Find a.txt\nDIR_FstClus:%#018lx\tDIR_FileSize:%#018lx\n", ((struct fat32_inode_info_t *)(dentry->dir_inode->private_inode_info))->first_clus, dentry->dir_inode->file_size);
     else
-        printk_color(BLUE, BLACK, "Can`t find file\n");
+        printk_color(ORANGE, BLACK, "Can`t find file\n");
 
     // show_welcome();
     // test_mm();