X-Git-Url: http://www.aleph1.co.uk/gitweb/?a=blobdiff_plain;f=yaffs_fileem.c;h=700695b52dadc8227c22f637ad0b513f3c26b132;hb=0c0639ff1c8a2d8fe5b03ad0284bb400ec78e7cb;hp=dbbe5f8b3a4d593d68f767e82a3ffad5fbc9094e;hpb=aa39fbf7616e8b26833a09cb64c6a40859494599;p=yaffs%2F.git

diff --git a/yaffs_fileem.c b/yaffs_fileem.c
index dbbe5f8..700695b 100644
--- 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;
 }