fix: 恢复了FATFS设置卷标的功能

Liteos_a FATFS需要提供格式化时设置卷标的功能，该功能在当前系统中缺失。
现在恢复该功能，使用方法与原来一致。即使用set_label设置卷标文本后，调用format对设备格式化。

Close #I3Y5G8

Signed-off-by: Far <yesiyuan2@huawei.com>

fs/fat/os_adapt/fatfs.c

@@ -1776,6 +1776,45 @@ static int fatfs_set_part_info(los_part *part)
     return 0;
 }
 
+static FRESULT fatfs_setlabel(los_part *part)
+{
+    QWORD start_sector = 0;
+    BYTE fmt = 0;
+    FATFS fs;
+    FRESULT result;
+
+#ifdef LOSCFG_FS_FAT_VIRTUAL_PARTITION
+    fs.vir_flag = FS_PARENT;
+    fs.parent_fs = &fs;
+    fs.vir_amount = DISK_ERROR;
+    fs.vir_avail = FS_VIRDISABLE;
+#endif
+    if (disk_ioctl(fs.pdrv, GET_SECTOR_SIZE, &(fs.ssize)) != RES_OK) {
+        return -EIO;
+    }
+    fs.win = (BYTE *)ff_memalloc(fs.ssize);
+    if (fs.win == NULL) {
+        return -ENOMEM;
+    }
+
+    result = find_fat_partition(&fs, part, &fmt, &start_sector);
+    if (result != FR_OK) {
+        free(fs.win);
+        return -fatfs_2_vfs(result);
+    }
+
+    result = init_fatobj(&fs, fmt, start_sector);
+    if (result != FR_OK) {
+        free(fs.win);
+        return -fatfs_2_vfs(result);
+    }
+
+    result = set_volumn_label(&fs, FatLabel);
+    free(fs.win);
+
+    return result;
+}
+
 int fatfs_mkfs (struct Vnode *device, int sectors, int option)
 {
     BYTE *work_buff = NULL;
@@ -1811,19 +1850,22 @@ int fatfs_mkfs (struct Vnode *device, int sectors, int option)
         return -fatfs_2_vfs(result);
     }
 
+    result = fatfs_setlabel(part);
+    if (result == FR_OK) {
 #ifdef LOSCFG_FS_FAT_CACHE
         ret = OsSdSync(part->disk_id);
         if (ret != 0) {
             return -EIO;
         }
 #endif
+    }
 
     ret = fatfs_set_part_info(part);
     if (ret != 0) {
         return -EIO;
     }
 
-    return 0;
+    return -fatfs_2_vfs(result);
 }
 
 int fatfs_mkdir(struct Vnode *parent, const char *name, mode_t mode, struct Vnode **vpp)

fs/fat/os_adapt/fatfs.h

@@ -113,6 +113,8 @@ extern "C" {
 #define FMT_ANY      0x07
 #define FMT_ERASE    0x08
 
+extern char FatLabel[LABEL_LEN];
+
 int fatfs_2_vfs(int result);
 int fatfs_lookup(struct Vnode *parent, const char *name, int len, struct Vnode **vpp);
 int fatfs_create(struct Vnode *parent, const char *name, int mode, struct Vnode **vpp);