*** empty log message ***

[yaffs/.git] / yaffs_fileem.c

diff --git a/yaffs_fileem.c b/yaffs_fileem.c
index dbbe5f8b3a4d593d68f767e82a3ffad5fbc9094e..700695b52dadc8227c22f637ad0b513f3c26b132 100644 (file)
--- a/yaffs_fileem.c
+++ b/yaffs_fileem.c
@@ -26,7 +26,9 @@
 #include <fcntl.h>
 #include <string.h>
 
-#define FILE_SIZE_IN_MEG 32
+#define FILE_SIZE_IN_MEG 4
+
+// #define YAFFS_ERROR_TESTING 
 
 #define BLOCK_SIZE (32 * 528)
 #define BLOCKS_PER_MEG ((1024*1024)/(32 * 512))
@@ -43,6 +45,7 @@ static int markedBadBlocks[] = { 1, 4, -1};
 
 static int IsAMarkedBadBlock(int blk)
 {
+#if YAFFS_ERROR_TESTING
        int *m = markedBadBlocks;
        
        while(*m >= 0)
@@ -50,10 +53,85 @@ static int IsAMarkedBadBlock(int blk)
                if(*m == blk) return 1;
                m++;
        }
+#endif
        return 0;
 }
 
 
+static __u8 yaffs_WriteFailCorruption(int chunkInNAND)
+{
+#if YAFFS_ERROR_TESTING
+
+       // Whole blocks that fail
+       switch(chunkInNAND/YAFFS_CHUNKS_PER_BLOCK)
+       {
+               case 50:
+               case 52:
+                                       return 7;
+       }
+       
+       // Single blocks that fail
+       switch(chunkInNAND)
+       {
+               case 2000:
+               case 2003:
+               case 3000:
+               case 3001:
+                                       return 3;// ding two bits
+               case 2001:
+               case 3003:
+               case 3004:
+               case 3005:
+               case 3006:
+               case 3007:  return 1;// ding one bit
+               
+               
+       }
+#endif
+       return 0;
+}
+
+static void yaffs_ModifyWriteData(int chunkInNAND,__u8 *data)
+{
+#if YAFFS_ERROR_TESTING
+       if(data)
+       {
+               *data ^= yaffs_WriteFailCorruption(chunkInNAND);        
+       }
+#endif
+}
+
+static __u8 yaffs_ReadFailCorruption(int chunkInNAND)
+{
+       switch(chunkInNAND)
+       {
+#if YAFFS_ERROR_TESTING
+               case 500:
+                                       return 3;// ding two bits
+               case 700:
+               case 750:
+                                       return 1;// ding one bit
+               
+#endif
+               default: return 0;
+               
+       }
+}
+
+static void yaffs_ModifyReadData(int chunkInNAND,__u8 *data)
+{
+#if YAFFS_ERROR_TESTING
+       if(data)
+       {
+               *data ^= yaffs_ReadFailCorruption(chunkInNAND); 
+       }
+#endif
+}
+
+
+
+
+
 static void  CheckInit(yaffs_Device *dev)
 {
        static int initialised = 0;
@@ -65,7 +143,11 @@ static void  CheckInit(yaffs_Device *dev)
        {
                memset(ffChunk,0xFF,528);
                
+#ifdef YAFFS_DUMP
+               h = open("yaffs-em-file" , O_RDONLY);
+#else
                h = open("yaffs-em-file" , O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
+#endif
                if(h < 0)
                {
                        perror("Fatal error opening yaffs emulation file");
@@ -100,6 +182,8 @@ static void  CheckInit(yaffs_Device *dev)
 
 int yaffs_FEWriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
 {
+       __u8 localData[512];
+       
        int pos;
        
        pos = chunkInNAND * 528;
@@ -109,8 +193,10 @@ int yaffs_FEWriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data,
        
        if(data)
        {
+               memcpy(localData,data,512);
+               yaffs_ModifyWriteData(chunkInNAND,localData);
                lseek(h,pos,SEEK_SET);
-               write(h,data,512);
+               write(h,localData,512);
        }
        
        pos += 512;
@@ -138,6 +224,7 @@ int yaffs_FEReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaf
        {
                lseek(h,pos,SEEK_SET);
                read(h,data,512);
+               yaffs_ModifyReadData(chunkInNAND,data);
        }
        
        pos += 512;
@@ -168,6 +255,13 @@ int yaffs_FEEraseBlockInNAND(yaffs_Device *dev,int blockInNAND)
        {
                write(h,ffChunk,528);
        }
+       
+       switch(blockInNAND)
+       {
+               case 10: 
+               case 15: return YAFFS_FAIL;
+               
+       }
        return YAFFS_OK;
 }