/* vi: set sw=4 ts=4: *//* * test_io.c --- This is the Test I/O interface. * * Copyright (C) 1996 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */#include <stdio.h>#include <string.h>#if HAVE_UNISTD_H#include <unistd.h>#endif#include <fcntl.h>#include <time.h>#if HAVE_SYS_STAT_H#include <sys/stat.h>#endif#if HAVE_SYS_TYPES_H#include <sys/types.h>#endif#include "ext2_fs.h"#include "ext2fs.h"/* * For checking structure magic numbers... */#define EXT2_CHECK_MAGIC(struct, code) \	  if ((struct)->magic != (code)) return (code)struct test_private_data {	int	magic;	io_channel real;	int flags;	FILE *outfile;	unsigned long block;	int read_abort_count, write_abort_count;	void (*read_blk)(unsigned long block, int count, errcode_t err);	void (*write_blk)(unsigned long block, int count, errcode_t err);	void (*set_blksize)(int blksize, errcode_t err);	void (*write_byte)(unsigned long block, int count, errcode_t err);};static errcode_t test_open(const char *name, int flags, io_channel *channel);static errcode_t test_close(io_channel channel);static errcode_t test_set_blksize(io_channel channel, int blksize);static errcode_t test_read_blk(io_channel channel, unsigned long block,			       int count, void *data);static errcode_t test_write_blk(io_channel channel, unsigned long block,				int count, const void *data);static errcode_t test_flush(io_channel channel);static errcode_t test_write_byte(io_channel channel, unsigned long offset,				 int count, const void *buf);static errcode_t test_set_option(io_channel channel, const char *option,				 const char *arg);static struct struct_io_manager struct_test_manager = {	EXT2_ET_MAGIC_IO_MANAGER,	"Test I/O Manager",	test_open,	test_close,	test_set_blksize,	test_read_blk,	test_write_blk,	test_flush,	test_write_byte,	test_set_option};io_manager test_io_manager = &struct_test_manager;/* * These global variable can be set by the test program as * necessary *before* calling test_open */io_manager test_io_backing_manager = 0;void (*test_io_cb_read_blk)	(unsigned long block, int count, errcode_t err) = 0;void (*test_io_cb_write_blk)	(unsigned long block, int count, errcode_t err) = 0;void (*test_io_cb_set_blksize)	(int blksize, errcode_t err) = 0;void (*test_io_cb_write_byte)	(unsigned long block, int count, errcode_t err) = 0;/* * Test flags */#define TEST_FLAG_READ			0x01#define TEST_FLAG_WRITE			0x02#define TEST_FLAG_SET_BLKSIZE		0x04#define TEST_FLAG_FLUSH			0x08#define TEST_FLAG_DUMP			0x10#define TEST_FLAG_SET_OPTION		0x20static void test_dump_block(io_channel channel,			    struct test_private_data *data,			    unsigned long block, const void *buf){	const unsigned char *cp;	FILE *f = data->outfile;	int	i;	unsigned long	cksum = 0;	for (i=0, cp = buf; i < channel->block_size; i++, cp++) {		cksum += *cp;	}	fprintf(f, "Contents of block %lu, checksum %08lu:\n", block, cksum);	for (i=0, cp = buf; i < channel->block_size; i++, cp++) {		if ((i % 16) == 0)			fprintf(f, "%04x: ", i);		fprintf(f, "%02x%c", *cp, ((i % 16) == 15) ? '\n' : ' ');	}}static void test_abort(io_channel channel, unsigned long block){	struct test_private_data *data;	FILE *f;	data = (struct test_private_data *) channel->private_data;	f = data->outfile;	test_flush(channel);	fprintf(f, "Aborting due to I/O to block %lu\n", block);	fflush(f);	abort();}static errcode_t test_open(const char *name, int flags, io_channel *channel){	io_channel	io = NULL;	struct test_private_data *data = NULL;	errcode_t	retval;	char		*value;	if (name == 0)		return EXT2_ET_BAD_DEVICE_NAME;	retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io);	if (retval)		return retval;	memset(io, 0, sizeof(struct struct_io_channel));	io->magic = EXT2_ET_MAGIC_IO_CHANNEL;	retval = ext2fs_get_mem(sizeof(struct test_private_data), &data);	if (retval) {		retval = EXT2_ET_NO_MEMORY;		goto cleanup;	}	io->manager = test_io_manager;	retval = ext2fs_get_mem(strlen(name)+1, &io->name);	if (retval)		goto cleanup;	strcpy(io->name, name);	io->private_data = data;	io->block_size = 1024;	io->read_error = 0;	io->write_error = 0;	io->refcount = 1;	memset(data, 0, sizeof(struct test_private_data));	data->magic = EXT2_ET_MAGIC_TEST_IO_CHANNEL;	if (test_io_backing_manager) {		retval = test_io_backing_manager->open(name, flags,						       &data->real);		if (retval)			goto cleanup;	} else		data->real = 0;	data->read_blk =	test_io_cb_read_blk;	data->write_blk =	test_io_cb_write_blk;	data->set_blksize =	test_io_cb_set_blksize;	data->write_byte =	test_io_cb_write_byte;	data->outfile = NULL;	if ((value = getenv("TEST_IO_LOGFILE")) != NULL)		data->outfile = fopen(value, "w");	if (!data->outfile)		data->outfile = stderr;	data->flags = 0;	if ((value = getenv("TEST_IO_FLAGS")) != NULL)		data->flags = strtoul(value, NULL, 0);	data->block = 0;	if ((value = getenv("TEST_IO_BLOCK")) != NULL)		data->block = strtoul(value, NULL, 0);	data->read_abort_count = 0;	if ((value = getenv("TEST_IO_READ_ABORT")) != NULL)		data->read_abort_count = strtoul(value, NULL, 0);	data->write_abort_count = 0;	if ((value = getenv("TEST_IO_WRITE_ABORT")) != NULL)		data->write_abort_count = strtoul(value, NULL, 0);	*channel = io;	return 0;cleanup:	ext2fs_free_mem(&io);	ext2fs_free_mem(&data);	return retval;}static errcode_t test_close(io_channel channel){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (--channel->refcount > 0)		return 0;	if (data->real)		retval = io_channel_close(data->real);	if (data->outfile && data->outfile != stderr)		fclose(data->outfile);	ext2fs_free_mem(&channel->private_data);	ext2fs_free_mem(&channel->name);	ext2fs_free_mem(&channel);	return retval;}static errcode_t test_set_blksize(io_channel channel, int blksize){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->real)		retval = io_channel_set_blksize(data->real, blksize);	if (data->set_blksize)		data->set_blksize(blksize, retval);	if (data->flags & TEST_FLAG_SET_BLKSIZE)		fprintf(data->outfile,			"Test_io: set_blksize(%d) returned %s\n",			blksize, retval ? error_message(retval) : "OK");	channel->block_size = blksize;	return retval;}static errcode_t test_read_blk(io_channel channel, unsigned long block,			       int count, void *buf){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->real)		retval = io_channel_read_blk(data->real, block, count, buf);	if (data->read_blk)		data->read_blk(block, count, retval);	if (data->flags & TEST_FLAG_READ)		fprintf(data->outfile,			"Test_io: read_blk(%lu, %d) returned %s\n",			block, count, retval ? error_message(retval) : "OK");	if (data->block && data->block == block) {		if (data->flags & TEST_FLAG_DUMP)			test_dump_block(channel, data, block, buf);		if (--data->read_abort_count == 0)			test_abort(channel, block);	}	return retval;}static errcode_t test_write_blk(io_channel channel, unsigned long block,			       int count, const void *buf){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->real)		retval = io_channel_write_blk(data->real, block, count, buf);	if (data->write_blk)		data->write_blk(block, count, retval);	if (data->flags & TEST_FLAG_WRITE)		fprintf(data->outfile,			"Test_io: write_blk(%lu, %d) returned %s\n",			block, count, retval ? error_message(retval) : "OK");	if (data->block && data->block == block) {		if (data->flags & TEST_FLAG_DUMP)			test_dump_block(channel, data, block, buf);		if (--data->write_abort_count == 0)			test_abort(channel, block);	}	return retval;}static errcode_t test_write_byte(io_channel channel, unsigned long offset,			       int count, const void *buf){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->real && data->real->manager->write_byte)		retval = io_channel_write_byte(data->real, offset, count, buf);	if (data->write_byte)		data->write_byte(offset, count, retval);	if (data->flags & TEST_FLAG_WRITE)		fprintf(data->outfile,			"Test_io: write_byte(%lu, %d) returned %s\n",			offset, count, retval ? error_message(retval) : "OK");	return retval;}/* * Flush data buffers to disk. */static errcode_t test_flush(io_channel channel){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->real)		retval = io_channel_flush(data->real);	if (data->flags & TEST_FLAG_FLUSH)		fprintf(data->outfile, "Test_io: flush() returned %s\n",			retval ? error_message(retval) : "OK");	return retval;}static errcode_t test_set_option(io_channel channel, const char *option,				 const char *arg){	struct test_private_data *data;	errcode_t	retval = 0;	EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);	data = (struct test_private_data *) channel->private_data;	EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);	if (data->flags & TEST_FLAG_SET_OPTION)		fprintf(data->outfile, "Test_io: set_option(%s, %s) ",			option, arg);	if (data->real && data->real->manager->set_option) {		retval = (data->real->manager->set_option)(data->real,							   option, arg);		if (data->flags & TEST_FLAG_SET_OPTION)			fprintf(data->outfile, "returned %s\n",				retval ? error_message(retval) : "OK");	} else {		if (data->flags & TEST_FLAG_SET_OPTION)			fprintf(data->outfile, "not implemented\n");	}	return retval;}