Changeset 265 for trunk/kernel/vfs/fatfs.h

Timestamp:

Jul 21, 2017, 7:36:08 AM (7 years ago)

Author:

alain

Message:

Fix several bugs in VFS.

File:

• trunk/kernel/vfs/fatfs.h (modified) (2 diffs)

trunk/kernel/vfs/fatfs.h

@@ -183 +183 @@
 
 //////////////////////////////////////////////////////////////////////////////////////////
-//              FATFS specific but public functions (used by RPC) 
+//              FATFS specific extern functions  
 //////////////////////////////////////////////////////////////////////////////////////////
 
 /******************************************************************************************
- * This static function scan the FAT (File Allocation Table), stored in the FAT mapper,
+ * This function scan the FAT (File Allocation Table), stored in the FAT mapper,
  * and returns the FATFS cluster index for a given page of a given file.
  * It must be called by a thread running in the cluster containing the FAT mapper.
+ * We can use a RPC to scan the remote FAT mapper, because the RPC_FIFO will avoid 
+ * contention in the cluster containing the FAT mapper, and the RPC latency is not 
+ * critical compared to the device access latency.
  * The FAT is actually an array of uint32_t slots. Each slot in this array contains the 
  * index of another slot in this array, to form one linked list for each file stored on
@@ -198 +201 @@
  * automatically updates the FAT mapper from informations stored on device in case of miss.
  ******************************************************************************************
- * @ mapper              : local pointer on the FAT mapper.
- * @ first_cluster       : index of the first FATFS cluster allocated to the file.
- * @ searched_page   : index of searched page in the file.
- * @ cluster         : [out] pointer on buffer for the found FATFS cluster index.
- * @ return 0 if success / return EIO if FAT mapper miss cannot be solved.
+ * @ mapper                  : local pointer on the FAT mapper.
+ * @ first_cluster_id    : index of the first FATFS cluster allocated to the file.
+ * @ searched_page       : index of searched page in the file.
+ * @ searched_cluster_id : [out] found FATFS cluster index.
+ * @ return 0 if success / return EIO if a FAT mapper miss cannot be solved.
  *****************************************************************************************/
 error_t fatfs_get_cluster( struct mapper_s * mapper,
                            uint32_t          first_cluster,
-                           uint32_t          searched_page,
-                           uint32_t        * cluster );
-
-
+                           uint32_t          page_index,
+                           uint32_t        * searched_cluster_id );
+
+/******************************************************************************************
+ * This function display the content of the FATFS context.
+ *****************************************************************************************/
+void fatfs_ctx_display();