/*
 * YAFFS: Yet another FFS. A NAND-flash specific file system. 
 *
 * Copyright (C) 2002 Aleph One Ltd.
 *   for Toby Churchill Ltd and Brightstar Engineering
 *
 * Created by Charles Manning <charles@aleph1.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */




#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>

#include "yaffsfs.h"


void dumpDir(const char *dname);

char xx[600];

void copy_in_a_file(char *yaffsName,char *inName)
{
	int inh,outh;
	unsigned char buffer[100];
	int ni,no;
	inh = open(inName,O_RDONLY);
	outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
	
	while((ni = read(inh,buffer,100)) > 0)
	{
		no = yaffs_write(outh,buffer,ni);
		if(ni != no)
		{
			printf("problem writing yaffs file\n");
		}
		
	}
	
	yaffs_close(outh);
	close(inh);
}

void make_a_file(char *yaffsName,char bval,int sizeOfFile)
{
	int outh;
	int i;
	unsigned char buffer[100];

	outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
	
	memset(buffer,bval,100);
	
	do{
		i = sizeOfFile;
		if(i > 100) i = 100;
		sizeOfFile -= i;
		
		yaffs_write(outh,buffer,i);
		
	} while (sizeOfFile > 0);
	
		
	yaffs_close(outh);

}

void make_pattern_file(char *fn,int size)
{
	int outh;
	int marker;
	int i;
	outh = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
	yaffs_lseek(outh,size-1,SEEK_SET);
	yaffs_write(outh,"A",1);
	
	for(i = 0; i < size; i+=256)
	{
		marker = ~i;
		yaffs_lseek(outh,i,SEEK_SET);
		yaffs_write(outh,&marker,sizeof(marker));
	}
	yaffs_close(outh);
	
}

int check_pattern_file(char *fn)
{
	int h;
	int marker;
	int i;
	int size;
	int ok = 1;
	
	h = yaffs_open(fn, O_RDWR,0);
	size = yaffs_lseek(h,0,SEEK_END);
		
	for(i = 0; i < size; i+=256)
	{
		yaffs_lseek(h,i,SEEK_SET);
		yaffs_read(h,&marker,sizeof(marker));
		ok = (marker == ~i);
		if(!ok)
		{
		   printf("pattern check failed on file %s, size %d at position %d. Got %x instead of %x\n",
					fn,size,i,marker,~i);
		}
	}
	yaffs_close(h);
	return ok;
}





int dump_file_data(char *fn)
{
	int h;
	int i = 0;
	int ok = 1;
	unsigned char b;
	
	h = yaffs_open(fn, O_RDWR,0);

				
	printf("%s\n",fn);
	while(yaffs_read(h,&b,1)> 0)
	{
		printf("%02x",b);
		i++;
		if(i > 32) 
		{
		   printf("\n");
		   i = 0;;
		 }
	}
	printf("\n");
	yaffs_close(h);
	return ok;
}



void dump_file(const char *fn)
{
	int i;
	int size;
	int h;
	
	h = yaffs_open(fn,O_RDONLY,0);
	if(h < 0)
	{
		printf("*****\nDump file %s does not exist\n",fn);
	}
	else
	{
		size = yaffs_lseek(h,0,SEEK_SET);
		printf("*****\nDump file %s size %d\n",fn,size);
		for(i = 0; i < size; i++)
		{
			
		}
	}
}

void create_file_of_size(const char *fn,int syze)
{
	int h;
	int n;
	int result;
	
	char xx[200];
	
	int iterations = (syze + strlen(fn) -1)/ strlen(fn);
	
	h = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
		
	while (iterations > 0)
	{
		sprintf(xx,"%s %8d",fn,iterations);
		n = strlen(xx);
		result = yaffs_write(h,xx,n);
		if(result != n)
			printf("Wrote %d, should have been %d\n",result,n);
		iterations--;
	}
	yaffs_close (h);
}

void verify_file_of_size(const char *fn,int syze)
{
	int h;
	int result;
	
	char xx[200];
	char yy[200];
	int l;
	
	int iterations = (syze + strlen(fn) -1)/ strlen(fn);
	
	h = yaffs_open(fn, O_RDONLY, S_IREAD | S_IWRITE);
		
	while (iterations > 0)
	{
		sprintf(xx,"%s %8d",fn,iterations);
		l = strlen(xx);
		
		result = yaffs_read(h,yy,l);
		yy[l] = 0;
		
		if(strcmp(xx,yy)){
			printf("=====>>>>> verification of file %s failed near position %lld\n",fn,(long long)yaffs_lseek(h,0,SEEK_CUR));
		}
		iterations--;
	}
	yaffs_close (h);
}

void create_resized_file_of_size(const char *fn,int syze1,int reSyze, int syze2)
{
	int h;
	
	int iterations;
	
	h = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
		
	iterations = (syze1 + strlen(fn) -1)/ strlen(fn);
	while (iterations > 0)
	{
		yaffs_write(h,fn,strlen(fn));
		iterations--;
	}
	
	yaffs_ftruncate(h,reSyze);
	
	yaffs_lseek(h,0,SEEK_SET);
	iterations = (syze2 + strlen(fn) -1)/ strlen(fn);
	while (iterations > 0)
	{
		yaffs_write(h,fn,strlen(fn));
		iterations--;
	}
	
	yaffs_close (h);
}


void do_some_file_stuff(const char *path)
{

	char fn[100];

	sprintf(fn,"%s/%s",path,"f1");
	create_file_of_size(fn,10000);

	sprintf(fn,"%s/%s",path,"fdel");
	create_file_of_size(fn,10000);
	yaffs_unlink(fn);

	sprintf(fn,"%s/%s",path,"f2");
	
	create_resized_file_of_size(fn,10000,3000,4000);
}

void yaffs_backward_scan_test(const char *path)
{
	char fn[100];
	
	yaffs_StartUp();	
	
	yaffs_mount(path);
	
	do_some_file_stuff(path);
	
	sprintf(fn,"%s/ddd",path);
	
	yaffs_mkdir(fn,0);
	
	do_some_file_stuff(fn);
	
	yaffs_unmount(path);
	
	yaffs_mount(path);
}

char xxzz[2000];


void yaffs_device_flush_test(const char *path)
{
	char fn[100];
	int h;
	int i;
	
	yaffs_StartUp();	
	
	yaffs_mount(path);
	
	do_some_file_stuff(path);
	
	// Open and add some data to a few files
	for(i = 0; i < 10; i++) {
	
		sprintf(fn,"%s/ff%d",path,i);

		h = yaffs_open(fn, O_CREAT | O_RDWR | O_TRUNC, S_IWRITE | S_IREAD);
		yaffs_write(h,xxzz,2000);
		yaffs_write(h,xxzz,2000);
	}
	yaffs_unmount(path);
	
	yaffs_mount(path);
}



void short_scan_test(const char *path, int fsize, int niterations)
{
	int i;
	char fn[100];
	
	sprintf(fn,"%s/%s",path,"f1");
	
	yaffs_StartUp();
	for(i = 0; i < niterations; i++)
	{
		printf("\n*****************\nIteration %d\n",i);
		yaffs_mount(path);
		printf("\nmount: Directory look-up of %s\n",path);
		dumpDir(path);
		make_a_file(fn,1,fsize);
		yaffs_unmount(path);
	}
}



void scan_pattern_test(const char *path, int fsize, int niterations)
{
	int i;
	int j;
	char fn[3][100];
	int result;
	
	sprintf(fn[0],"%s/%s",path,"f0");
	sprintf(fn[1],"%s/%s",path,"f1");
	sprintf(fn[2],"%s/%s",path,"f2");
	
	yaffs_StartUp();
	
	for(i = 0; i < niterations; i++)
	{
		printf("\n*****************\nIteration %d\n",i);
		yaffs_mount(path);
		printf("\nmount: Directory look-up of %s\n",path);
		dumpDir(path);
		for(j = 0; j < 3; j++)
		{
			result = dump_file_data(fn[j]);
			result = check_pattern_file(fn[j]);
			make_pattern_file(fn[j],fsize); 
			result = dump_file_data(fn[j]);
			result = check_pattern_file(fn[j]);
		}
		yaffs_unmount(path);
	}
}

void fill_disk(const char *path,int nfiles)
{
	int h;
	int n;
	int result;
	int f;
	
	char str[50];
	
	for(n = 0; n < nfiles; n++)
	{
		sprintf(str,"%s/%d",path,n);
		
		h = yaffs_open(str, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
		
		printf("writing file %s handle %d ",str, h);
		
		while ((result = yaffs_write(h,xx,600)) == 600)
		{
			f = yaffs_freespace(path);
		}
		result = yaffs_close(h);
		printf(" close %d\n",result);
	}
}

void fill_disk_and_delete(const char *path, int nfiles, int ncycles)
{
	int i,j;
	char str[50];
	int result;
	
	for(i = 0; i < ncycles; i++)
	{
		printf("@@@@@@@@@@@@@@ cycle %d\n",i);
		fill_disk(path,nfiles);
		
		for(j = 0; j < nfiles; j++)
		{
			sprintf(str,"%s/%d",path,j);
			result = yaffs_unlink(str);
			printf("unlinking file %s, result %d\n",str,result);
		}
	}
}


void fill_files(const char *path,int flags, int maxIterations,int siz)
{
	int i;
	int j;
	char str[50];
	int h;
	
	i = 0;
	
	do{
		sprintf(str,"%s/%d",path,i);
		h = yaffs_open(str, O_CREAT | O_TRUNC | O_RDWR,S_IREAD | S_IWRITE);

		if(h >= 0)
		{
			for(j = 0; j < siz; j++)
			{
				yaffs_write(h,str,1);
			}
		}
		
		if( flags & 1)
		{
			yaffs_unlink(str);
		}
		i++;
	} while(h >= 0 && i < maxIterations);
	
	if(flags & 2)
	{
		i = 0;
		do{
			sprintf(str,"%s/%d",path,i);
			printf("unlink %s\n",str);
			i++;
		} while(yaffs_unlink(str) >= 0);
	}
}

void leave_unlinked_file(char *path,int maxIterations,int siz)
{
	int i;
	char str[50];
	int h;
	
	i = 0;
	
	do{
		sprintf(str,"%s/%d",path,i);
		printf("create %s\n",str);
		h = yaffs_open(str, O_CREAT | O_TRUNC | O_RDWR,S_IREAD | S_IWRITE);
		if(h >= 0)
		{
			yaffs_unlink(str);
		}
		i++;
	} while(h < 0 && i < maxIterations);
	
	if(h >= 0)
	{
		for(i = 0; i < siz; i++)
		{
			yaffs_write(h,str,1);
		}
	}
	
	printf("Leaving file %s open\n",str);

}

void dumpDirFollow(const char *dname)
{
	yaffs_DIR *d;
	yaffs_dirent *de;
	struct yaffs_stat s;
	char str[100];
			
	d = yaffs_opendir(dname);
	
	if(!d)
	{
		printf("opendir failed\n");
	}
	else
	{
		while((de = yaffs_readdir(d)) != NULL)
		{
			sprintf(str,"%s/%s",dname,de->d_name);
			
			yaffs_stat(str,&s);
			
			printf("%s ino %d length %d mode %X ",de->d_name,(int)s.st_ino,(int)s.st_size,s.st_mode);
			switch(s.st_mode & S_IFMT)
			{
				case S_IFREG: printf("data file"); break;
				case S_IFDIR: printf("directory"); break;
				case S_IFLNK: printf("symlink -->");
							  if(yaffs_readlink(str,str,100) < 0)
								printf("no alias");
							  else
								printf("\"%s\"",str);    
							  break;
				default: printf("unknown"); break;
			}
			
			printf("\n");           
		}
		
		yaffs_closedir(d);
	}
	printf("\n");
	
	printf("Free space in %s is %d\n\n",dname,(int)yaffs_freespace(dname));

}


void dump_directory_tree_worker(const char *dname,int recursive)
{
	yaffs_DIR *d;
	yaffs_dirent *de;
	struct yaffs_stat s;
	char str[1000];
			
	d = yaffs_opendir(dname);
	
	if(!d)
	{
		printf("opendir failed\n");
	}
	else
	{
		while((de = yaffs_readdir(d)) != NULL)
		{
			sprintf(str,"%s/%s",dname,de->d_name);
			
			yaffs_lstat(str,&s);
			
			printf("%s inode %d obj %x length %d mode %X ",str,s.st_ino,de->d_dont_use,(int)s.st_size,s.st_mode);
			switch(s.st_mode & S_IFMT)
			{
				case S_IFREG: printf("data file"); break;
				case S_IFDIR: printf("directory"); break;
				case S_IFLNK: printf("symlink -->");
							  if(yaffs_readlink(str,str,100) < 0)
								printf("no alias");
							  else
								printf("\"%s\"",str);    
							  break;
				default: printf("unknown"); break;
			}
			
			printf("\n");

			if((s.st_mode & S_IFMT) == S_IFDIR && recursive)
				dump_directory_tree_worker(str,1);
							
		}
		
		yaffs_closedir(d);
	}

}

static void dump_directory_tree(const char *dname)
{
	dump_directory_tree_worker(dname,1);
	printf("\n");
	printf("Free space in %s is %d\n\n",dname,(int)yaffs_freespace(dname));
}

void dumpDir(const char *dname)
{	dump_directory_tree_worker(dname,0);
	printf("\n");
	printf("Free space in %s is %d\n\n",dname,(int)yaffs_freespace(dname));
}


static void PermissionsCheck(const char *path, mode_t tmode, int tflags,int expectedResult)
{
	int fd;
	
	if(yaffs_chmod(path,tmode)< 0) printf("chmod failed\n");
	
	fd = yaffs_open(path,tflags,0);
	
	if((fd >= 0) != (expectedResult > 0))
	{
		printf("Permissions check %x %x %d failed\n",tmode,tflags,expectedResult);
	}
	else
	{
		printf("Permissions check %x %x %d OK\n",tmode,tflags,expectedResult);
	}
	
	
	yaffs_close(fd);
	
	
}

int long_test(int argc, char *argv[])
{

	int f;
	int r;
	char buffer[20];
	
	char str[100];
	
	int h;
	mode_t temp_mode;
	struct yaffs_stat ystat;
	
	yaffs_StartUp();
	
	yaffs_mount("/boot");
	yaffs_mount("/data");
	yaffs_mount("/flash");
	yaffs_mount("/ram");
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /data\n");
	dumpDir("/data");
	printf("\nDirectory look-up of /flash\n");
	dumpDir("/flash");

	//leave_unlinked_file("/flash",20000,0);
	//leave_unlinked_file("/data",20000,0);
	
	leave_unlinked_file("/ram",20,0);
	

	f = yaffs_open("/boot/b1", O_RDONLY,0);
	
	printf("open /boot/b1 readonly, f=%d\n",f);
	
	f = yaffs_open("/boot/b1", O_CREAT,S_IREAD | S_IWRITE);
	
	printf("open /boot/b1 O_CREAT, f=%d\n",f);
	
	
	r = yaffs_write(f,"hello",1);
	printf("write %d attempted to write to a read-only file\n",r);
	
	r = yaffs_close(f);
	
	printf("close %d\n",r);

	f = yaffs_open("/boot/b1", O_RDWR,0);
	
	printf("open /boot/b1 O_RDWR,f=%d\n",f);
	
	
	r = yaffs_write(f,"hello",2);
	printf("write %d attempted to write to a writeable file\n",r);
	r = yaffs_write(f,"world",3);
	printf("write %d attempted to write to a writeable file\n",r);
	
	r= yaffs_lseek(f,0,SEEK_END);
	printf("seek end %d\n",r);
	memset(buffer,0,20);
	r = yaffs_read(f,buffer,10);
	printf("read %d \"%s\"\n",r,buffer);
	r= yaffs_lseek(f,0,SEEK_SET);
	printf("seek set %d\n",r);
	memset(buffer,0,20);
	r = yaffs_read(f,buffer,10);
	printf("read %d \"%s\"\n",r,buffer);
	memset(buffer,0,20);
	r = yaffs_read(f,buffer,10);
	printf("read %d \"%s\"\n",r,buffer);

	// Check values reading at end.
	// A read past end of file should return 0 for 0 bytes read.
		
	r= yaffs_lseek(f,0,SEEK_END);
	r = yaffs_read(f,buffer,10);
	printf("read at end returned  %d\n",r); 
	r= yaffs_lseek(f,500,SEEK_END);
	r = yaffs_read(f,buffer,10);
	printf("read past end returned  %d\n",r);       
	
	r = yaffs_close(f);
	
	printf("close %d\n",r);
	
	copy_in_a_file("/boot/yyfile","xxx");
	
	// Create a file with a long name
	
	copy_in_a_file("/boot/file with a long name","xxx");
	
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");

	// Check stat
	r = yaffs_stat("/boot/file with a long name",&ystat);
	
	// Check rename
	
	r = yaffs_rename("/boot/file with a long name","/boot/r1");
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	
	// Check unlink
	r = yaffs_unlink("/boot/r1");
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");

	// Check mkdir
	
	r = yaffs_mkdir("/boot/directory1",0);
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /boot/directory1\n");
	dumpDir("/boot/directory1");

	// add a file to the directory                  
	copy_in_a_file("/boot/directory1/file with a long name","xxx");
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /boot/directory1\n");
	dumpDir("/boot/directory1");
	
	//  Attempt to delete directory (should fail)
	
	r = yaffs_rmdir("/boot/directory1");
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /boot/directory1\n");
	dumpDir("/boot/directory1");
	
	// Delete file first, then rmdir should work
	r = yaffs_unlink("/boot/directory1/file with a long name");
	r = yaffs_rmdir("/boot/directory1");
	
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /boot/directory1\n");
	dumpDir("/boot/directory1");

#if 0
	fill_disk_and_delete("/boot",20,20);
			
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
#endif

	yaffs_symlink("yyfile","/boot/slink");
	
	yaffs_readlink("/boot/slink",str,100);
	printf("symlink alias is %s\n",str);
	
	
	
	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	printf("\nDirectory look-up of /boot (using stat instead of lstat)\n");
	dumpDirFollow("/boot");
	printf("\nDirectory look-up of /boot/directory1\n");
	dumpDir("/boot/directory1");

	h = yaffs_open("/boot/slink",O_RDWR,0);
	
	printf("file length is %d\n",(int)yaffs_lseek(h,0,SEEK_END));
	
	yaffs_close(h);
	
	yaffs_unlink("/boot/slink");

	
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	
	// Check chmod
	
	yaffs_stat("/boot/yyfile",&ystat);
	temp_mode = ystat.st_mode;
	
	yaffs_chmod("/boot/yyfile",0x55555);
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	
	yaffs_chmod("/boot/yyfile",temp_mode);
	printf("\nDirectory look-up of /boot\n");
	dumpDir("/boot");
	
	// Permission checks...
	PermissionsCheck("/boot/yyfile",0, O_WRONLY,0);
	PermissionsCheck("/boot/yyfile",0, O_RDONLY,0);
	PermissionsCheck("/boot/yyfile",0, O_RDWR,0);

	PermissionsCheck("/boot/yyfile",S_IREAD, O_WRONLY,0);
	PermissionsCheck("/boot/yyfile",S_IREAD, O_RDONLY,1);
	PermissionsCheck("/boot/yyfile",S_IREAD, O_RDWR,0);

	PermissionsCheck("/boot/yyfile",S_IWRITE, O_WRONLY,1);
	PermissionsCheck("/boot/yyfile",S_IWRITE, O_RDONLY,0);
	PermissionsCheck("/boot/yyfile",S_IWRITE, O_RDWR,0);
	
	PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_WRONLY,1);
	PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_RDONLY,1);
	PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_RDWR,1);

	yaffs_chmod("/boot/yyfile",temp_mode);
	
	//create a zero-length file and unlink it (test for scan bug)
	
	h = yaffs_open("/boot/zlf",O_CREAT | O_TRUNC | O_RDWR,0);
	yaffs_close(h);
	
	yaffs_unlink("/boot/zlf");
	
	
	yaffs_DumpDevStruct("/boot");
	
	fill_disk_and_delete("/boot",20,20);
	
	yaffs_DumpDevStruct("/boot");
	
	fill_files("/boot",1,10000,0);
	fill_files("/boot",1,10000,5000);
	fill_files("/boot",2,10000,0);
	fill_files("/boot",2,10000,5000);
	
	leave_unlinked_file("/data",20000,0);
	leave_unlinked_file("/data",20000,5000);
	leave_unlinked_file("/data",20000,5000);
	leave_unlinked_file("/data",20000,5000);
	leave_unlinked_file("/data",20000,5000);
	leave_unlinked_file("/data",20000,5000);
	
	yaffs_DumpDevStruct("/boot");
	yaffs_DumpDevStruct("/data");
	
		
		
	return 0;

}

int huge_directory_test_on_path(char *path)
{

	yaffs_DIR *d;
	yaffs_dirent *de;
	struct yaffs_stat s;

	int f;
	int i;

	int total = 0;
	int lastTotal = 0;
	
	char str[100];

	
	yaffs_StartUp();
	
	yaffs_mount(path);
	
	// Create a large number of files
	
	for(i = 0; i < 2000; i++)
	{
	  sprintf(str,"%s/%d",path,i);
	  
	   f = yaffs_open(str,O_CREAT,S_IREAD | S_IWRITE);
	   yaffs_close(f);
	}
	
	
	
	d = yaffs_opendir(path);
	i = 0;
	if (d) {
	while((de = yaffs_readdir(d)) != NULL) {
	if (total >lastTotal+100*9*1024||(i & 1023)==0){
	printf("files = %d, total = %d\n",i, total);
	lastTotal = total;
	}
		i++;
		sprintf(str,"%s/%s",path,de->d_name);
		yaffs_lstat(str,&s);
		switch(s.st_mode & S_IFMT){
		case S_IFREG:
	//printf("data file");
	total += s.st_size;
	break;
	}
	}
	
	yaffs_closedir(d);
	}
	
	return 0;
}

int yaffs_scan_test(const char *path)
{
	return 0;
}


void rename_over_test(const char *mountpt)
{
	int i;
	char a[100];
	char b[100];
	char c[100];
	
	sprintf(a,"%s/a",mountpt);
	sprintf(b,"%s/b",mountpt);
	sprintf(c,"%s/c",mountpt);
	
	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	printf("Existing files\n");
	dumpDirFollow(mountpt);
	
	
	
	i = yaffs_open(c,O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	printf("File c handle is %d\n",i);
	yaffs_close(i);
	i = yaffs_open(a,O_CREAT | O_TRUNC | O_RDWR,  S_IREAD | S_IWRITE); 
	yaffs_close(i);
	i = yaffs_open(b,O_CREAT | O_TRUNC | O_RDWR,  S_IREAD | S_IWRITE);
	yaffs_close(i);
	yaffs_rename(a,b); // rename over
	yaffs_rename(b,a); // rename back again (not renaimng over)
	yaffs_rename(a,b); // rename back again (not renaimng over)
	
	
	yaffs_unmount(mountpt);
	
}


int resize_stress_test(const char *path)
{
   int a,b,i,j;
   int x;
   int r;
   char aname[100];
   char bname[100];
   
   char abuffer[1000];
   char bbuffer[1000];
   
   yaffs_StartUp();
   
   yaffs_mount(path);
   
   sprintf(aname,"%s%s",path,"/a");
   sprintf(bname,"%s%s",path,"/b");
   
   memset(abuffer,'a',1000);
   memset(bbuffer,'b',1000);
   
   a = yaffs_open(aname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   b = yaffs_open(bname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   
   printf(" %s %d %s %d\n",aname,a,bname,b);
  
   x = 0;
   
   for(j = 0; j < 100; j++)
   {
		yaffs_lseek(a,0,SEEK_END);

		
		for(i = 0; i <20000; i++)
		{
		   //r =        yaffs_lseek(b,i,SEEK_SET);
			//r = yaffs_write(b,bbuffer,1000);
			
			if(x & 0x16)
			{
				// shrink
				int syz = yaffs_lseek(a,0,SEEK_END);
				
				syz -= 500;
				if(syz < 0) syz = 0;
				yaffs_ftruncate(a,syz);
				
			}
			else
			{
				//expand
				r = yaffs_lseek(a,i * 500,SEEK_SET);
				r = yaffs_write(a,abuffer,1000);
			}
			x++;
			
		}
   }
   
   return 0;
   
}


int overwrite_test(const char *path)
{
   char aname[100];
   char bname[100];
   int i;
   int j;   
   int a;
   int b;
   yaffs_StartUp();
   
   yaffs_mount(path);
   
   sprintf(aname,"%s%s",path,"/a");
   sprintf(bname,"%s%s",path,"/b");
   
   b = yaffs_open(bname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   for(j= 0; j < 500; j++){
   	yaffs_write(b,bname,100);
	a = yaffs_open(aname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   	for(i = 0; i < rand() % 20000; i++)
   		yaffs_write(a,&a,sizeof(a));
	yaffs_close(a);
   }
   
   return 0;
   
}


int root_perm_remount(const char *path)
{
   struct yaffs_stat s;
   
   yaffs_StartUp();
   
   yaffs_mount(path);
   
   yaffs_stat(path,&s);
   printf("root perms after mount %x\n",s.st_mode);
   
   yaffs_chmod(path, 0777);

   yaffs_stat(path,&s);
   printf("root perms after setting to 0777 is  %x\n",s.st_mode);
   
   yaffs_unmount(path);
      
   return 0;
   
}


int resize_stress_test_no_grow_complex(const char *path,int iters)
{
   int a,b,i,j;
   int x;
   int r;
   char aname[100];
   char bname[100];
   
   char abuffer[1000];
   char bbuffer[1000];

   
   yaffs_StartUp();
   
   yaffs_mount(path);
   
   sprintf(aname,"%s%s",path,"/a");
   sprintf(bname,"%s%s",path,"/b");
   
   memset(abuffer,'a',1000);
   memset(bbuffer,'b',1000);
   
   a = yaffs_open(aname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   b = yaffs_open(bname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   
   printf(" %s %d %s %d\n",aname,a,bname,b);
  
   x = 0;
   
   for(j = 0; j < iters; j++)
   {
		yaffs_lseek(a,0,SEEK_END);

		
		for(i = 0; i <20000; i++)
		{
		   //r =        yaffs_lseek(b,i,SEEK_SET);
			//r = yaffs_write(b,bbuffer,1000);
			
			if(!(x%20))
			{
				// shrink
				int syz = yaffs_lseek(a,0,SEEK_END);
				
				while(syz > 4000)
				{
				
					syz -= 2050;
					if(syz < 0) syz = 0;
					yaffs_ftruncate(a,syz);
					syz = yaffs_lseek(a,0,SEEK_END);
					printf("shrink to %d\n",syz);
				}
				
				
			}
			else
			{
				//expand
				r = yaffs_lseek(a,500,SEEK_END);
				r = yaffs_write(a,abuffer,1000);
			}
			x++;
			
					
		}
		
		printf("file size is %lld\n",(long long)yaffs_lseek(a,0,SEEK_END));

   }
   
   return 0;
   
}

int resize_stress_test_no_grow(const char *path,int iters)
{
   int a,b,i,j;
   int x;
   int r;
   char aname[100];
   char bname[100];
   
   char abuffer[1000];
   char bbuffer[1000];
   
   yaffs_StartUp();
   
   yaffs_mount(path);
   
   sprintf(aname,"%s%s",path,"/a");
   sprintf(bname,"%s%s",path,"/b");
   
   memset(abuffer,'a',1000);
   memset(bbuffer,'b',1000);
   
   a = yaffs_open(aname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   b = yaffs_open(bname, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   
   printf(" %s %d %s %d\n",aname,a,bname,b);
  
   x = 0;
   
   for(j = 0; j < iters; j++)
   {
		yaffs_lseek(a,0,SEEK_END);

		
		for(i = 0; i <20000; i++)
		{
		   //r =        yaffs_lseek(b,i,SEEK_SET);
			//r = yaffs_write(b,bbuffer,1000);
			
			if(!(x%20))
			{
				// shrink
				int syz = yaffs_lseek(a,0,SEEK_END);
				
				while(syz > 4000)
				{
				
					syz -= 2050;
					if(syz < 0) syz = 0;
					yaffs_ftruncate(a,syz);
					syz = yaffs_lseek(a,0,SEEK_END);
					printf("shrink to %d\n",syz);
				}
				
				
			}
			else
			{
				//expand
				r = yaffs_lseek(a,-500,SEEK_END);
				r = yaffs_write(a,abuffer,1000);
			}
			x++;
			
					
		}
		printf("file size is %lld\n",(long long)yaffs_lseek(a,0,SEEK_END));

   }
   
   return 0;
   
}

int directory_rename_test(void)
{
	int r;
	yaffs_StartUp();
	
	yaffs_mount("/ram");
	yaffs_mkdir("/ram/a",0);
	yaffs_mkdir("/ram/a/b",0);
	yaffs_mkdir("/ram/c",0);
	
	printf("\nDirectory look-up of /ram\n");
	dumpDir("/ram");
	dumpDir("/ram/a");
	dumpDir("/ram/a/b");

	printf("Do rename (should fail)\n");
		
	r = yaffs_rename("/ram/a","/ram/a/b/d");
	printf("\nDirectory look-up of /ram\n");
	dumpDir("/ram");
	dumpDir("/ram/a");
	dumpDir("/ram/a/b");

	printf("Do rename (should not fail)\n");
		
	r = yaffs_rename("/ram/c","/ram/a/b/d");
	printf("\nDirectory look-up of /ram\n");
	dumpDir("/ram");
	dumpDir("/ram/a");
	dumpDir("/ram/a/b");
	
	
	return 1;
	
}

int cache_read_test(void)
{
	int a,b,c;
	int i;
	int sizeOfFiles = 500000;
	char buffer[100];
	
	yaffs_StartUp();
	
	yaffs_mount("/boot");
	
	make_a_file("/boot/a",'a',sizeOfFiles);
	make_a_file("/boot/b",'b',sizeOfFiles);

	a = yaffs_open("/boot/a",O_RDONLY,0);
	b = yaffs_open("/boot/b",O_RDONLY,0);
	c = yaffs_open("/boot/c", O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);

	do{
		i = sizeOfFiles;
		if (i > 100) i = 100;
		sizeOfFiles  -= i;
		yaffs_read(a,buffer,i);
		yaffs_read(b,buffer,i);
		yaffs_write(c,buffer,i);
	} while(sizeOfFiles > 0);
	
	
	
	return 1;
	
}

int cache_bypass_bug_test(void)
{
	// This test reporoduces a bug whereby YAFFS caching *was* buypassed
	// resulting in erroneous reads after writes.
	// This bug has been fixed.
	
	int a;
	char buffer1[1000];
	char buffer2[1000];
	
	memset(buffer1,0,sizeof(buffer1));
	memset(buffer2,0,sizeof(buffer2));
		
	yaffs_StartUp();
	
	yaffs_mount("/boot");
	
	// Create a file of 2000 bytes.
	make_a_file("/boot/a",'X',2000);

	a = yaffs_open("/boot/a",O_RDWR, S_IREAD | S_IWRITE);
	
	// Write a short sequence to the file.
	// This will go into the cache.
	yaffs_lseek(a,0,SEEK_SET);
	yaffs_write(a,"abcdefghijklmnopqrstuvwxyz",20); 

	// Read a short sequence from the file.
	// This will come from the cache.
	yaffs_lseek(a,0,SEEK_SET);
	yaffs_read(a,buffer1,30); 

	// Read a page size sequence from the file.
	yaffs_lseek(a,0,SEEK_SET);
	yaffs_read(a,buffer2,512); 
	
	printf("buffer 1 %s\n",buffer1);
	printf("buffer 2 %s\n",buffer2);
	
	if(strncmp(buffer1,buffer2,20))
	{
		printf("Cache bypass bug detected!!!!!\n");
	}
	
	
	return 1;
}


int free_space_check(void)
{
	int f;
	
		yaffs_StartUp();
		yaffs_mount("/boot");
	    fill_disk("/boot/",2);
	    f = yaffs_freespace("/boot");
	    
	    printf("%d free when disk full\n",f);           
	    return 1;
}

int truncate_test(void)
{
	int a;
	int r;
	int i;
	int l;

	char y[10];

	yaffs_StartUp();
	yaffs_mount("/boot");

	yaffs_unlink("/boot/trunctest");
	
	a = yaffs_open("/boot/trunctest", O_CREAT | O_TRUNC | O_RDWR,  S_IREAD | S_IWRITE);
	
	yaffs_write(a,"abcdefghijklmnopqrstuvwzyz",26);
	
	yaffs_ftruncate(a,3);
	l= yaffs_lseek(a,0,SEEK_END);
	
	printf("truncated length is %d\n",l);

	yaffs_lseek(a,5,SEEK_SET);
	yaffs_write(a,"1",1);

	yaffs_lseek(a,0,SEEK_SET);
	
	r = yaffs_read(a,y,10);

	printf("read %d bytes:",r);

	for(i = 0; i < r; i++) printf("[%02X]",y[i]);

	printf("\n");

	return 0;

}





void fill_disk_test(const char *mountpt)
{
	int i;
	yaffs_StartUp();
	
	for(i = 0; i < 5; i++)
	{
		yaffs_mount(mountpt);
		fill_disk_and_delete(mountpt,100,i+1);
		yaffs_unmount(mountpt);
	}
	
}


void fill_files_test(const char *mountpt)
{
	int i;
	yaffs_StartUp();
	
	for(i = 0; i < 5; i++)
	{
		yaffs_mount(mountpt);
		fill_files(mountpt,2,3,100);
		yaffs_unmount(mountpt);
	}
	
}

void fill_empty_files_test(const char *mountpt)
{
	int i;
	yaffs_StartUp();
	char name[100];
	int result = 0;
	
	int d,f;

	for(i = 0; i < 5; i++)
	{
		yaffs_mount(mountpt);
		for(d = 0; result >= 0 && d < 1000; d++){
			sprintf(name,"%s/%d",mountpt,d);
			result= yaffs_mkdir(name,0);
			printf("creating directory %s result %d\n",name,result);
			
			for(f = 0; result >= 0 && f < 100; f++){
				sprintf(name,"%s/%d/%d",mountpt,d,f);
				result= yaffs_open(name,O_CREAT, 0);
				yaffs_close(result);
				printf("creating file %s result %d\n",name,result);
			}
		}
		yaffs_unmount(mountpt);
	}
	
}

void long_name_test(const char *mountpt)
{
	int i;
	yaffs_StartUp();
	char fullName[1000];
	char name[300];
	int result = 0;
	
	int d,f;
	
	// Make a 256 byte name
	memset(name,0,sizeof(name));
	for(i = 0; i < 256; i++)
		name[i] = '0' + i % 10;
		
	sprintf(fullName,"%s/%s",mountpt,name);

	for(i = 0; i < 1; i++)
	{
		yaffs_mount(mountpt);
		
		printf("Files at start\n");
		dumpDir(mountpt);
		
		printf("Creating file %s\n",fullName);
		
		f = yaffs_open(fullName,O_CREAT | O_RDWR,0);
		yaffs_close(f);
		
		printf("Result %d\n",f);
			
		printf("Files\n");
		dumpDir(mountpt);
		
		printf("Deleting %s\n",fullName);
		result = yaffs_unlink(fullName);
		printf("Result %d\n",result);
		
		printf("Files\n");
		
		dumpDir(mountpt);
		
		yaffs_unmount(mountpt);
	}
	
}


void lookup_test(const char *mountpt)
{
	int i;
	int h;
	char a[100];
	

	yaffs_DIR *d;
	yaffs_dirent *de;

	yaffs_StartUp();
	
	yaffs_mount(mountpt);
				
	d = yaffs_opendir(mountpt);
	
	if(!d)
	{
		printf("opendir failed\n");
	}
	else
	{
		
		for(i = 0; (de = yaffs_readdir(d)) != NULL; i++)
		{
			printf("unlinking %s\n",de->d_name);
			yaffs_unlink(de->d_name);
		}
		
		printf("%d files deleted\n",i);
	}
	
	
	for(i = 0; i < 2000; i++){
	sprintf(a,"%s/%d",mountpt,i);
		h =  yaffs_open(a,O_CREAT | O_TRUNC | O_RDWR, 0);
		yaffs_close(h);
	}

	yaffs_rewinddir(d);
	for(i = 0; (de = yaffs_readdir(d)) != NULL; i++)
	{
		printf("%d  %s\n",i,de->d_name);
	}	
	
	printf("%d files listed\n\n\n",i);
	
	yaffs_rewinddir(d);
	yaffs_readdir(d);
	yaffs_readdir(d);
	yaffs_readdir(d);
	
	for(i = 0; i < 2000; i++){
		sprintf(a,"%s/%d",mountpt,i);
		yaffs_unlink(a);
	}
	
		
	yaffs_unmount(mountpt);
	
}

void link_test0(const char *mountpt)
{
	int i;
	char namea[300];
	char nameb[300];
	int result = 0;
	

	yaffs_StartUp();
	yaffs_mount(mountpt);
	
		
	sprintf(namea,"%s/a",mountpt);
	sprintf(nameb,"%s/b",mountpt);

	printf("mounted\n");
        dumpDir(mountpt);

	yaffs_unlink(namea);
	printf("a unlinked\n");
        dumpDir(mountpt);

	yaffs_unlink(nameb);
	printf("b unlinked\n");
        dumpDir(mountpt);
	
	result = yaffs_open(namea,O_CREAT| O_RDWR,0666);
        yaffs_close(result);
	printf("a created\n");
        dumpDir(mountpt);

        yaffs_link(namea,nameb);
        printf("linked\n");
        dumpDir(mountpt);
        yaffs_unlink(namea);
        printf("a ulinked\n");
        dumpDir(mountpt);
        yaffs_unlink(nameb);
        printf("b unlinked\n");
        dumpDir(mountpt);

	yaffs_unmount(mountpt);
}


void link_test1(const char *mountpt)
{
	int i;
	int h;
	char a[100];
	char b[100];
	char c[100];

	sprintf(a,"%s/aaa",mountpt);
	sprintf(b,"%s/bbb",mountpt);
	sprintf(c,"%s/ccc",mountpt);
	
	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	
	h = yaffs_open(a, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	for(i = 0; i < 100; i++)
		yaffs_write(h,a,100);
	
	yaffs_close(h);
	
	yaffs_unlink(b);
	yaffs_unlink(c);
	yaffs_link(a,b);
	yaffs_link(a,c);
	yaffs_unlink(b);
	yaffs_unlink(c);
	yaffs_unlink(a);
	
	
	yaffs_unmount(mountpt);
	yaffs_mount(mountpt);
	
	printf("link test done\n");	
}

void handle_test(const char *mountpt)
{
	int i;
	int h;
	int cycle;
	char a[100];

	sprintf(a,"%s/aaa",mountpt);
	
	yaffs_StartUp();
	
	yaffs_mount(mountpt);

        for(cycle = 0; cycle < 5; cycle++){
        printf("Start cycle %d\n",cycle);
 	i = 0;
	do {
        h = yaffs_open(a, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	printf("%d  handle %d\n",i,h);
	i++;
	} while(h >= 0);
	
	while(i >= -1) {
	 yaffs_close(i);
	 i--;
        }
        }
	
	yaffs_unmount(mountpt);
}

void freespace_test(const char *mountpt)
{
	int i;
	int h;
	char a[100];
	
	int  f0;
	int f1;
	int f2;
	int f3;
	sprintf(a,"%s/aaa",mountpt);
	
	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	f0 = yaffs_freespace(mountpt);
	
	h = yaffs_open(a, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	
	for(i = 0; i < 100; i++)
		yaffs_write(h,a,100);
	
	yaffs_close(h);
	
	f1 = yaffs_freespace(mountpt);
	
	yaffs_unlink(a);
	
	f2 = yaffs_freespace(mountpt);
	
		
	yaffs_unmount(mountpt);
	yaffs_mount(mountpt);
	
	f3 = yaffs_freespace(mountpt);
	
	printf("%d\n%d\n%d\n%d\n",f0, f1,f2,f3);
	
	
}

void simple_rw_test(const char *mountpt)
{
	int i;
	int h;
	char a[100];
	
	int x;
	int result;

	sprintf(a,"%s/aaa",mountpt);
	
	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	yaffs_unlink(a);
	
	h = yaffs_open(a,O_CREAT| O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	
	for(i = 100000;i < 200000; i++){
		result = yaffs_write(h,&i,sizeof(i));
		
		if(result != 4)
		{
			printf("write error\n");
			exit(1);
		}
	}
	
	//yaffs_close(h);
	
	// h = yaffs_open(a,O_RDWR, S_IREAD | S_IWRITE);
	
	
	yaffs_lseek(h,0,SEEK_SET);
	
	for(i = 100000; i < 200000; i++){
		result = yaffs_read(h,&x,sizeof(x));
		
		if(result != 4 || x != i){
			printf("read error %d %x %x\n",i,result,x);
		}
	}
	
	printf("Simple rw test passed\n");
	
	
	
}


void scan_deleted_files_test(const char *mountpt)
{
	char fn[100];
	char sub[100];
	
	const char *p;
	
	int i;
	int j;
	int k;
	int h;
	
	sprintf(sub,"%s/sdir",mountpt);
	yaffs_StartUp();
	
	for(j = 0; j < 10; j++)
	{
		printf("\n\n>>>>>>> Run %d <<<<<<<<<<<<<\n\n",j);
		yaffs_mount(mountpt);
		yaffs_mkdir(sub,0);
		
		
		p = (j & 0) ? mountpt: sub;
	
		for(i = 0; i < 100; i++)
		{
		  sprintf(fn,"%s/%d",p,i);  
		  
		  if(i & 1)
		  {
			  h = yaffs_open(fn,O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
			  for(k = 0; k < 1000; k++)
				  yaffs_write(h,fn,100);
			  yaffs_close(h);
		  }
		  else
		    	yaffs_mkdir(fn,0);
		}
		
		for(i = 0; i < 10; i++)
		{
		  sprintf(fn,"%s/%d",p,i);  
		  if(i & 1) 
		  	yaffs_unlink(fn);
		  else
		  	yaffs_rmdir(fn);
		  
		}
				
		yaffs_unmount(mountpt);
	}
	
	
	

}


void write_10k(int h)
{
   int i;
   const char *s="0123456789";
   for(i = 0; i < 1000; i++)
     yaffs_write(h,s,10);

}
void write_200k_file(const char *fn, const char *fdel, const char *fdel1)
{
   int h1;
   int i;
   int offs;
   
   h1 = yaffs_open(fn, O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
   
   for(i = 0; i < 100000; i+= 10000)
   {
   	write_10k(h1);
   }
   
   offs = yaffs_lseek(h1,0,SEEK_CUR);
   if( offs != 100000)
   {
   	printf("Could not write file\n");
   }
   
   yaffs_unlink(fdel);
   for(i = 0; i < 100000; i+= 10000)
   {
   	write_10k(h1);
   }
   
   offs = yaffs_lseek(h1,0,SEEK_CUR);
   if( offs != 200000)
   {
   	printf("Could not write file\n");
   }
   
   yaffs_close(h1);
   yaffs_unlink(fdel1);
   
}


void verify_200k_file(const char *fn)
{
   int h1;
   int i;
   char x[11];
   const char *s="0123456789";
   int errCount = 0;
   
   h1 = yaffs_open(fn, O_RDONLY, 0);
   
   for(i = 0; i < 200000 && errCount < 10; i+= 10)
   {
   	yaffs_read(h1,x,10);
	if(strncmp(x,s,10) != 0)
	{
		printf("File %s verification failed at %d\n",fn,i);
		errCount++;
	}
   }
   if(errCount >= 10)
   	printf("Too many errors... aborted\n");
      
   yaffs_close(h1);	   
	
}


void check_resize_gc_bug(const char *mountpt)
{

	char a[30];
	char b[30];
	char c[30];
	
	int i;
	
	sprintf(a,"%s/a",mountpt);
	sprintf(b,"%s/b",mountpt);
	sprintf(c,"%s/c",mountpt);
	

	
	
	yaffs_StartUp();
	yaffs_mount(mountpt);
	yaffs_unlink(a);
	yaffs_unlink(b);
	
	for(i = 0; i < 50; i++)
	{  
	   printf("A\n");write_200k_file(a,"",c);
	   printf("B\n");verify_200k_file(a);
	   printf("C\n");write_200k_file(b,a,c);
	   printf("D\n");verify_200k_file(b);
	   yaffs_unmount(mountpt);
	   yaffs_mount(mountpt);
	   printf("E\n");verify_200k_file(a);
	   printf("F\n");verify_200k_file(b);
	}
		
}


void multi_mount_test(const char *mountpt,int nmounts)
{

	char a[30];
	
	int i;
	int j;
	
	sprintf(a,"%s/a",mountpt);

	yaffs_StartUp();
	
	for(i = 0; i < nmounts; i++){
		int h0;
		int h1;
		int len0;
		int len1;
		
		static char xx[1000];
		
		printf("############### Iteration %d   Start\n",i);
		if(1 || i == 0 || i == 5) 
			yaffs_mount(mountpt);

		dump_directory_tree(mountpt);
		
		
		yaffs_mkdir(a,0);
		
		sprintf(xx,"%s/0",a);
		h0 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
		
		sprintf(xx,"%s/1",a);
		h1 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);

#if 0		
		for(j = 0; j < 200; j++){
		   yaffs_write(h0,xx,1000);
		   yaffs_write(h1,xx,1000);
		}
#else
		while(yaffs_write(h0,xx,1000) > 0){
		   
		   yaffs_write(h1,xx,1000);
		}
#endif
		len0 = yaffs_lseek(h0,0,SEEK_END);
		len1 = yaffs_lseek(h1,0,SEEK_END);
		
		yaffs_lseek(h0,0,SEEK_SET);
		yaffs_lseek(h1,0,SEEK_SET);

		for(j = 0; j < 200; j++){
		   yaffs_read(h0,xx,1000);
		   yaffs_read(h1,xx,1000);
		}
		
		
	//	yaffs_truncate(h0,0);
		yaffs_close(h0);
		yaffs_close(h1);
		
		printf("########### %d\n",i);
		dump_directory_tree(mountpt);

		if(1 || i == 4 || i == nmounts -1)
			yaffs_unmount(mountpt);
	}
}


void small_mount_test(const char *mountpt,int nmounts)
{

	char a[30];
	
	int i;
	int j;

	int h0;
	int h1;
	int len0;
	int len1;
	int nread;
	
	sprintf(a,"%s/a",mountpt);

	yaffs_StartUp();
	
	
	
	for(i = 0; i < nmounts; i++){
		
		static char xx[1000];
		
		printf("############### Iteration %d   Start\n",i);
		if(1 || i == 0 || i == 5) 
			yaffs_mount(mountpt);

		dump_directory_tree(mountpt);
		
		yaffs_mkdir(a,0);
		
		sprintf(xx,"%s/0",a);
		if(i ==0){
		
			h0 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
			for(j = 0; j < 130; j++)
				yaffs_write(h0,xx,1000);
			yaffs_close(h0);
		}
		
		h0 = yaffs_open(xx,O_RDONLY,0);
		
		sprintf(xx,"%s/1",a);
		h1 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
		
		while((nread = yaffs_read(h0,xx,1000)) > 0)
			yaffs_write(h1,xx,nread);
		
		
		len0 = yaffs_lseek(h0,0,SEEK_END);
		len1 = yaffs_lseek(h1,0,SEEK_END);
		
		yaffs_lseek(h0,0,SEEK_SET);
		yaffs_lseek(h1,0,SEEK_SET);

		for(j = 0; j < 200; j++){
		   yaffs_read(h0,xx,1000);
		   yaffs_read(h1,xx,1000);
		}
		
		yaffs_close(h0);
		yaffs_close(h1);
		
		printf("########### %d\n",i);
		dump_directory_tree(mountpt);

		if(1 || i == 4 || i == nmounts -1)
			yaffs_unmount(mountpt);
	}
}


int early_exit;

void small_overwrite_test(const char *mountpt,int nmounts)
{

	char a[30];
	int i;
	int j;

	int h0;
	int h1;

	
	sprintf(a,"%s/a",mountpt);

	yaffs_StartUp();
	
	
	
	for(i = 0; i < nmounts; i++){
		
		static char xx[8000];
		
		printf("############### Iteration %d   Start\n",i);
		if(1)
			yaffs_mount(mountpt);

		dump_directory_tree(mountpt);
		
		yaffs_mkdir(a,0);
		
		sprintf(xx,"%s/0",a);
		h0 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
		sprintf(xx,"%s/1",a);
		h1 = yaffs_open(xx, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
		
		for(j = 0; j < 1000000; j+=1000){
			yaffs_ftruncate(h0,j);
			yaffs_lseek(h0,j,SEEK_SET);
			yaffs_write(h0,xx,7000);
			yaffs_write(h1,xx,7000);
			
			if(early_exit)
				exit(0);
		}
		
		yaffs_close(h0);
		
		printf("########### %d\n",i);
		dump_directory_tree(mountpt);

		if(1)
			yaffs_unmount(mountpt);
	}
}


void seek_overwrite_test(const char *mountpt,int nmounts)
{

	char a[30];
	
	int i;
	int j;

	int h0;

	
	sprintf(a,"%s/f",mountpt);

	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	
	for(i = 0; i < nmounts; i++){
		
		h0 = yaffs_open(a, O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
			
		for(j = 0; j < 100000; j++){
			yaffs_lseek(h0,0,SEEK_SET);
			yaffs_write(h0,xx,5000);
			yaffs_lseek(h0,0x100000,SEEK_SET);
			yaffs_write(h0,xx,5000);
			
			if(early_exit)
				exit(0);
		}
		
		yaffs_close(h0);
		
	}
}


void yaffs_touch(const char *fn)
{
	yaffs_chmod(fn, S_IREAD | S_IWRITE);
}

void checkpoint_fill_test(const char *mountpt,int nmounts)
{

	char a[50];
	char b[50];
	char c[50];
	
	int i;
	int j;
	int h;
	
	sprintf(a,"%s/a",mountpt);
	

	
	
	yaffs_StartUp();
	
	for(i = 0; i < nmounts; i++){
		printf("############### Iteration %d   Start\n",i);
		yaffs_mount(mountpt);
		dump_directory_tree(mountpt);
		yaffs_mkdir(a,0);
		
		sprintf(b,"%s/zz",a);
		
		h = yaffs_open(b,O_CREAT | O_RDWR,S_IREAD |S_IWRITE);
		
		
		while(yaffs_write(h,c,50) == 50){}
		
		yaffs_close(h);
		
		for(j = 0; j < 2; j++){
			printf("touch %d\n",j);
			yaffs_touch(b);
			yaffs_unmount(mountpt);
			yaffs_mount(mountpt);
		}

		dump_directory_tree(mountpt);		
		yaffs_unmount(mountpt);
	}
}


int make_file2(const char *name1, const char *name2,int syz)
{

	char xx[2500];
	int i;
	int h1=-1,h2=-1;
	int n = 1;


	if(name1)
		h1 = yaffs_open(name1,O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	if(name2)
		h2 = yaffs_open(name2,O_CREAT | O_TRUNC | O_RDWR, S_IREAD | S_IWRITE);
	
	while(syz > 0 && n > 0){
		i = (syz > 2500) ? 2500 : syz;
		n = yaffs_write(h1,xx,i);
		n = yaffs_write(h2,xx,i);
		syz -= 500;
	}
	yaffs_close(h1);
	yaffs_close(h2);
	return 0;
}


extern void SetCheckpointReservedBlocks(int n);

void checkpoint_upgrade_test(const char *mountpt,int nmounts)
{

	char a[50];
	char b[50];
	char c[50];
	char d[50];

	int j;
	
	sprintf(a,"%s/a",mountpt);
	

	
	
	printf("Create start condition\n");
	yaffs_StartUp();
	yaffs_mount(mountpt);
	yaffs_mkdir(a,0);
	sprintf(b,"%s/zz",a);
	sprintf(c,"%s/xx",a);
	make_file2(b,c,2000000);
	sprintf(d,"%s/aa",a);
	make_file2(d,NULL,500000000);
	dump_directory_tree(mountpt);
	
	printf("Umount/mount attempt full\n");
	yaffs_unmount(mountpt);
	
	yaffs_mount(mountpt);
	
	printf("unlink small file\n");
	yaffs_unlink(c);
	dump_directory_tree(mountpt);
		
	printf("Umount/mount attempt\n");
	yaffs_unmount(mountpt);
	yaffs_mount(mountpt);
	
	for(j = 0; j < 500; j++){
		printf("***** touch %d\n",j);
		dump_directory_tree(mountpt);
		yaffs_touch(b);
		yaffs_unmount(mountpt);
		yaffs_mount(mountpt);
	}

	for(j = 0; j < 500; j++){
		printf("***** touch %d\n",j);
		dump_directory_tree(mountpt);
		yaffs_touch(b);
		yaffs_unmount(mountpt);
		yaffs_mount(mountpt);
	}
}
	
void huge_array_test(const char *mountpt,int n)
{

	char a[50];

	
	int i;
	int space;
	
	int fnum;
	
	sprintf(a,"mount point %s",mountpt);
	

	
	yaffs_StartUp();

	yaffs_mount(mountpt);
	
	while(n>0){
		n--;
		fnum = 0;
		printf("\n\n START run\n\n");
		while((space = yaffs_freespace(mountpt)) > 25000000){
			sprintf(a,"%s/file%d",mountpt,fnum);
			fnum++;
			printf("create file %s, free space %d\n",a,space);
			create_file_of_size(a,10000000);
			printf("verifying file %s\n",a);
			verify_file_of_size(a,10000000);
		}
		
		printf("\n\n verification/deletion\n\n");
		
		for(i = 0; i < fnum; i++){
			sprintf(a,"%s/file%d",mountpt,i);
			printf("verifying file %s\n",a);
			verify_file_of_size(a,10000000);
			printf("deleting file %s\n",a);
			yaffs_unlink(a);
		}
		printf("\n\n done \n\n");
			
		   
	}
}


void random_write(int h)
{
	static char buffer[12000];
	int n;
	
	n = random() & 0x1FFF;
	yaffs_write(h,buffer,n);
}

void random_seek(int h)
{
	int n;
	n = random() & 0xFFFFF;
	yaffs_lseek(h,n,SEEK_SET);
}

void random_truncate(int h, char * name)
{
	int n;
	int flen;
	n = random() & 0xFFFFF;
	flen = yaffs_lseek(h,0,SEEK_END);
	if(n > flen)
		n = flen / 2;
	yaffs_ftruncate(h,n);
	yaffs_lseek(h,n,SEEK_SET);
}


#define NSMALLFILES 10	
void random_small_file_test(const char *mountpt,int iterations)
{

	char a[NSMALLFILES][50];

	
	int i;
	int n;
	int h[NSMALLFILES];
	int r;
	
	
	yaffs_StartUp();

	yaffs_mount(mountpt);
	
	for(i = 0; i < NSMALLFILES; i++){
		h[i]=-1;
		strcpy(a[i],"");
	}
	
	for(n = 0; n < iterations; n++){
				
		for(i = 0; i < NSMALLFILES; i++) {
			r = random();
			
			if(strlen(a[i]) == 0){
				sprintf(a[i],"%s/%dx%d",mountpt,n,i);
				h[i] = yaffs_open(a[i],O_RDWR | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE);
			}
			
			if(h[i] < -1)
				printf("Could not open yaffs file %d %d error %d\n",n,i,h[i]);
			else {
				r = r & 7;
				switch(r){
					case 0:
					case 1:
					case 2:
						random_write(h[i]);
						break;
					case 3:
						random_truncate(h[i],a[i]);
						break;
					case 4:
					case 5:	random_seek(h[i]);
						break;
					case 6:
						yaffs_close(h[i]);
						h[i] = -1;
						break;
					case 7:
						yaffs_close(h[i]);
						yaffs_unlink(a[i]);
						strcpy(a[i],"");
						h[i] = -1;
				}
			}
		}
		   
	}
	
	for(i = 0; i < NSMALLFILES; i++)
		yaffs_close(h[i]);
		
	yaffs_unmount(mountpt);
}

void rmdir_test(const char *mountpt)
{
	char name[100];
	yaffs_StartUp();
	
	yaffs_mount(mountpt);
	
	strcpy(name,mountpt);
	strcat(name,"/");
	strcat(name,"hello");
	yaffs_mkdir(name,0666);
	yaffs_rmdir(name);
	yaffs_unmount(mountpt);
}
	

int random_seed;
int simulate_power_failure;

int main(int argc, char *argv[])
{
	random_seed = time(NULL);
	//return long_test(argc,argv);
	
	//return cache_read_test();
	
	// resize_stress_test_no_grow("/flash/flash",20);
	//root_perm_remount("/flash/flash");
	
	//huge_directory_test_on_path("/ram2k");
	
	 //yaffs_backward_scan_test("/flash/flash");
	// yaffs_device_flush_test("/flash/flash");

	//rename_over_test("//////////////////flash///////////////////yaffs1///////////");
	
	//fill_empty_files_test("/yaffs2/");
	//resize_stress_test("/yaffs2");
	overwrite_test("/yaffs2");
	
	//long_name_test("/yaffs2");
	//link_test0("/yaffs2");
	//link_test1("yaffs2");
	 //scan_pattern_test("/flash",10000,10);
	//short_scan_test("/flash/flash",40000,200);
	  //small_mount_test("/flash/flash",1000);
	  //small_overwrite_test("/flash/flash",1000);
	  //seek_overwrite_test("/flash/flash",1000);
	 //checkpoint_fill_test("/flash/flash",20);
	 //checkpoint_upgrade_test("/flash/flash",20);
	  //small_overwrite_test("/flash/flash",1000);
	  //checkpoint_fill_test("/flash/flash",20);
	// random_small_file_test("/flash/flash",10000);
	 // huge_array_test("/flash/flash",10);


	// handle_test("yaffs2/");
	
	//long_test_on_path("/ram2k");
	// long_test_on_path("/flash");
	//simple_rw_test("/flash/flash");
	//fill_disk_test("/flash/flash");
	// rename_over_test("/flash");
	//lookup_test("/flash");
	//freespace_test("/flash/flash");
	
	//link_test("/flash/flash");
	
	
	
	
	// cache_bypass_bug_test();
	
	 //free_space_check();
	 
	 //check_resize_gc_bug("/flash");
	 
	 return 0;
	
}
