/* 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 0x20 static 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_for_write(value); 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; }