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From: Ryan Cumming <ryan@completely.kicks-ass.org>
To: Andreas Dilger <adilger@clusterfs.com>, "Theodore Ts'o" <tytso@mit.edu>,
       linux-kernel@vger.kernel.org
Subject: Re: [BK PATCH] Add ext3 indexed directory (htree) support
Date: Fri, 27 Sep 2002 18:20:27 -0700
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References: <E17uINs-0003bG-00@think.thunk.org> <20020926235741.GC10551@think.thunk.org> <20020927041234.GS22795@clusterfs.com>
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On September 26, 2002 21:12, Andreas Dilger wrote:
> After that, we'd be happy if you could test with a loopback filesystem:

Okay, got another one:
"EXT3-fs error (device loop(7,0)): ext3_add_entry: bad entry in directory #2: 
rec_len is smaller than minimal - offset=0, inode=0, rec_len=8, name_len=0"
fsck then reported:
"Directory inode 2, block 166, offset 0: directory corrupted"

This is while deleteing an old fsstress directory (a full fsck had been 
performed since the last time the fsstress directory had been touched) while 
running a few instances of the attached program.

You guys have any idea what's going on yet? 

- -Ryan

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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>

#define MAX_FILE_COUNT	4000000

int main(int argc, char *argv[])
{
	while(1) 
	{
		unsigned int seed;
		struct timeval tv;
		int i;
		int count;

		gettimeofday(&tv, NULL);
		seed = tv.tv_usec;
		count = seed % MAX_FILE_COUNT;

		srand(seed);
		printf("Creating %i files\n" , count);
		for(i = 0; i < count;i++)
		{
			char filename[32];
			snprintf(filename, 32, "%x", rand());
			close(open(filename, O_CREAT | O_RDONLY));
		}

		printf("Performing %i random lookups\n" , count);
		for(i = 0; i < count;i++)
		{
			char filename[32];
			struct stat useless;

			snprintf(filename, 32, "%x", rand());
			stat(filename, &useless);
		}

		srand(seed);
		printf("Unlinking %i files\n" , count);
		for(i = 0; i < count;i++)
		{
			char filename[32];
			snprintf(filename, 32, "%x", rand());
			unlink(filename);
		}
	}
}

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