556 lines
15 KiB
C
556 lines
15 KiB
C
/*
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* test_io.c --- This is the Test I/O interface.
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*
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* Copyright (C) 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <fcntl.h>
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#include <time.h>
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#if HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_PRCTL_H
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#include <sys/prctl.h>
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#else
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#define PR_GET_DUMPABLE 3
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#endif
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#if (!defined(HAVE_PRCTL) && defined(linux))
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#include <sys/syscall.h>
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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/*
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* For checking structure magic numbers...
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*/
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#define EXT2_CHECK_MAGIC(struct, code) \
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if ((struct)->magic != (code)) return (code)
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struct test_private_data {
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int magic;
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io_channel real;
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int flags;
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FILE *outfile;
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unsigned long block;
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int read_abort_count, write_abort_count;
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void (*read_blk)(unsigned long block, int count, errcode_t err);
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void (*write_blk)(unsigned long block, int count, errcode_t err);
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void (*set_blksize)(int blksize, errcode_t err);
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void (*write_byte)(unsigned long block, int count, errcode_t err);
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void (*read_blk64)(unsigned long long block, int count, errcode_t err);
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void (*write_blk64)(unsigned long long block, int count, errcode_t err);
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};
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/*
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* These global variable can be set by the test program as
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* necessary *before* calling test_open
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*/
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io_manager test_io_backing_manager = 0;
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void (*test_io_cb_read_blk)
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(unsigned long block, int count, errcode_t err) = 0;
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void (*test_io_cb_write_blk)
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(unsigned long block, int count, errcode_t err) = 0;
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void (*test_io_cb_read_blk64)
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(unsigned long long block, int count, errcode_t err) = 0;
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void (*test_io_cb_write_blk64)
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(unsigned long long block, int count, errcode_t err) = 0;
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void (*test_io_cb_set_blksize)
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(int blksize, errcode_t err) = 0;
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void (*test_io_cb_write_byte)
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(unsigned long block, int count, errcode_t err) = 0;
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/*
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* Test flags
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*/
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#define TEST_FLAG_READ 0x01
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#define TEST_FLAG_WRITE 0x02
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#define TEST_FLAG_SET_BLKSIZE 0x04
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#define TEST_FLAG_FLUSH 0x08
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#define TEST_FLAG_DUMP 0x10
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#define TEST_FLAG_SET_OPTION 0x20
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#define TEST_FLAG_DISCARD 0x40
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#define TEST_FLAG_READAHEAD 0x80
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#define TEST_FLAG_ZEROOUT 0x100
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static void test_dump_block(io_channel channel,
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struct test_private_data *data,
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unsigned long block, const void *buf)
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{
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const unsigned char *cp;
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FILE *f = data->outfile;
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int i;
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unsigned long cksum = 0;
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for (i=0, cp = buf; i < channel->block_size; i++, cp++) {
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cksum += *cp;
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}
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fprintf(f, "Contents of block %lu, checksum %08lu: \n", block, cksum);
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for (i=0, cp = buf; i < channel->block_size; i++, cp++) {
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if ((i % 16) == 0)
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fprintf(f, "%04x: ", i);
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fprintf(f, "%02x%c", *cp, ((i % 16) == 15) ? '\n' : ' ');
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}
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}
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/*
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* Flush data buffers to disk.
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*/
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static errcode_t test_flush(io_channel channel)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *)channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real)
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retval = io_channel_flush(data->real);
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if (data->flags & TEST_FLAG_FLUSH)
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fprintf(data->outfile, "Test_io: flush() returned %s\n",
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retval ? error_message(retval) : "OK");
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return retval;
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}
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static void test_abort(io_channel channel, unsigned long block)
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{
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struct test_private_data *data;
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FILE *f;
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data = (struct test_private_data *) channel->private_data;
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f = data->outfile;
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test_flush(channel);
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fprintf(f, "Aborting due to I/O to block %lu\n", block);
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fflush(f);
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abort();
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}
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static char *safe_getenv(const char *arg)
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{
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#if !defined(_WIN32)
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if ((getuid() != geteuid()) || (getgid() != getegid()))
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return NULL;
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#endif
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#if HAVE_PRCTL
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if (prctl(PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
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return NULL;
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#else
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#if (defined(linux) && defined(SYS_prctl))
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if (syscall(SYS_prctl, PR_GET_DUMPABLE, 0, 0, 0, 0) == 0)
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return NULL;
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#endif
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#endif
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#if defined(HAVE_SECURE_GETENV)
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return secure_getenv(arg);
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#elif defined(HAVE___SECURE_GETENV)
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return __secure_getenv(arg);
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#else
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return getenv(arg);
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#endif
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}
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static errcode_t test_open(const char *name, int flags, io_channel *channel)
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{
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io_channel io = NULL;
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struct test_private_data *data = NULL;
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errcode_t retval;
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char *value;
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if (name == 0)
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return EXT2_ET_BAD_DEVICE_NAME;
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retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io);
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if (retval)
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goto cleanup;
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memset(io, 0, sizeof(struct struct_io_channel));
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io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
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retval = ext2fs_get_mem(sizeof(struct test_private_data), &data);
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if (retval)
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goto cleanup;
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io->manager = test_io_manager;
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retval = ext2fs_get_mem(strlen(name)+1, &io->name);
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if (retval)
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goto cleanup;
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strcpy(io->name, name);
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io->private_data = data;
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io->block_size = 1024;
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io->read_error = 0;
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io->write_error = 0;
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io->refcount = 1;
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io->flags = 0;
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memset(data, 0, sizeof(struct test_private_data));
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data->magic = EXT2_ET_MAGIC_TEST_IO_CHANNEL;
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if (test_io_backing_manager) {
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retval = test_io_backing_manager->open(name, flags,
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&data->real);
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if (retval)
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goto cleanup;
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} else {
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data->real = 0;
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}
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data->read_blk = test_io_cb_read_blk;
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data->write_blk = test_io_cb_write_blk;
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data->set_blksize = test_io_cb_set_blksize;
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data->write_byte = test_io_cb_write_byte;
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data->read_blk64 = test_io_cb_read_blk64;
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data->write_blk64 = test_io_cb_write_blk64;
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data->outfile = NULL;
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if ((value = safe_getenv("TEST_IO_LOGFILE")) != NULL)
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data->outfile = fopen(value, "w");
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if (!data->outfile)
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data->outfile = stderr;
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data->flags = 0;
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if ((value = safe_getenv("TEST_IO_FLAGS")) != NULL)
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data->flags = strtoul(value, NULL, 0);
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data->block = 0;
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if ((value = safe_getenv("TEST_IO_BLOCK")) != NULL)
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data->block = strtoul(value, NULL, 0);
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data->read_abort_count = 0;
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if ((value = safe_getenv("TEST_IO_READ_ABORT")) != NULL)
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data->read_abort_count = strtoul(value, NULL, 0);
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data->write_abort_count = 0;
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if ((value = safe_getenv("TEST_IO_WRITE_ABORT")) != NULL)
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data->write_abort_count = strtoul(value, NULL, 0);
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if (data->real) {
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io->align = data->real->align;
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if (data->real->flags & CHANNEL_FLAGS_THREADS)
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io->flags |= CHANNEL_FLAGS_THREADS;
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}
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*channel = io;
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return 0;
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cleanup:
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if (io)
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ext2fs_free_mem(&io);
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if (data)
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ext2fs_free_mem(&data);
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return retval;
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}
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static errcode_t test_close(io_channel channel)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (--channel->refcount > 0)
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return 0;
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if (data->real)
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retval = io_channel_close(data->real);
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if (data->outfile && data->outfile != stderr)
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fclose(data->outfile);
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ext2fs_free_mem(&channel->private_data);
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if (channel->name)
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ext2fs_free_mem(&channel->name);
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ext2fs_free_mem(&channel);
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return retval;
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}
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static errcode_t test_set_blksize(io_channel channel, int blksize)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real) {
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retval = io_channel_set_blksize(data->real, blksize);
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channel->align = data->real->align;
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}
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if (data->set_blksize)
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data->set_blksize(blksize, retval);
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if (data->flags & TEST_FLAG_SET_BLKSIZE)
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fprintf(data->outfile,
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"Test_io: set_blksize(%d) returned %s\n",
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blksize, retval ? error_message(retval) : "OK");
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channel->block_size = blksize;
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return retval;
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}
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static errcode_t test_read_blk(io_channel channel, unsigned long block,
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int count, void *buf)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real)
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retval = io_channel_read_blk(data->real, block, count, buf);
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if (data->read_blk)
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data->read_blk(block, count, retval);
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if (data->flags & TEST_FLAG_READ)
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fprintf(data->outfile,
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"Test_io: read_blk(%lu, %d) returned %s\n",
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block, count, retval ? error_message(retval) : "OK");
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if (data->block && data->block == block) {
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if (data->flags & TEST_FLAG_DUMP)
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test_dump_block(channel, data, block, buf);
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if (--data->read_abort_count == 0)
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test_abort(channel, block);
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}
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return retval;
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}
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static errcode_t test_write_blk(io_channel channel, unsigned long block,
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int count, const void *buf)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real)
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retval = io_channel_write_blk(data->real, block, count, buf);
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if (data->write_blk)
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data->write_blk(block, count, retval);
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if (data->flags & TEST_FLAG_WRITE)
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fprintf(data->outfile,
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"Test_io: write_blk(%lu, %d) returned %s\n",
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block, count, retval ? error_message(retval) : "OK");
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if (data->block && data->block == block) {
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if (data->flags & TEST_FLAG_DUMP)
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test_dump_block(channel, data, block, buf);
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if (--data->write_abort_count == 0)
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test_abort(channel, block);
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}
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return retval;
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}
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static errcode_t test_read_blk64(io_channel channel, unsigned long long block,
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int count, void *buf)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real)
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retval = io_channel_read_blk64(data->real, block, count, buf);
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if (data->read_blk64)
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data->read_blk64(block, count, retval);
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if (data->flags & TEST_FLAG_READ)
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fprintf(data->outfile,
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"Test_io: read_blk64(%llu, %d) returned %s\n",
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block, count, retval ? error_message(retval) : "OK");
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if (data->block && data->block == block) {
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if (data->flags & TEST_FLAG_DUMP)
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test_dump_block(channel, data, block, buf);
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if (--data->read_abort_count == 0)
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test_abort(channel, block);
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}
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return retval;
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}
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static errcode_t test_write_blk64(io_channel channel, unsigned long long block,
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int count, const void *buf)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real)
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retval = io_channel_write_blk64(data->real, block, count, buf);
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if (data->write_blk64)
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data->write_blk64(block, count, retval);
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if (data->flags & TEST_FLAG_WRITE)
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fprintf(data->outfile,
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"Test_io: write_blk64(%llu, %d) returned %s\n",
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block, count, retval ? error_message(retval) : "OK");
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if (data->block && data->block == block) {
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if (data->flags & TEST_FLAG_DUMP)
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test_dump_block(channel, data, block, buf);
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if (--data->write_abort_count == 0)
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test_abort(channel, block);
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}
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return retval;
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}
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static errcode_t test_write_byte(io_channel channel, unsigned long offset,
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int count, const void *buf)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real && data->real->manager->write_byte)
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retval = io_channel_write_byte(data->real, offset, count, buf);
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if (data->write_byte)
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data->write_byte(offset, count, retval);
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if (data->flags & TEST_FLAG_WRITE)
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fprintf(data->outfile,
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"Test_io: write_byte(%lu, %d) returned %s\n",
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offset, count, retval ? error_message(retval) : "OK");
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return retval;
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}
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static errcode_t test_set_option(io_channel channel, const char *option,
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const char *arg)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->flags & TEST_FLAG_SET_OPTION)
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fprintf(data->outfile, "Test_io: set_option(%s, %s) ",
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option, arg);
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if (data->real && data->real->manager->set_option) {
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retval = (data->real->manager->set_option)(data->real,
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option, arg);
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if (data->flags & TEST_FLAG_SET_OPTION)
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fprintf(data->outfile, "returned %s\n",
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retval ? error_message(retval) : "OK");
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} else {
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if (data->flags & TEST_FLAG_SET_OPTION)
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fprintf(data->outfile, "not implemented\n");
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}
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return retval;
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}
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static errcode_t test_get_stats(io_channel channel, io_stats *stats)
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{
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struct test_private_data *data;
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errcode_t retval = 0;
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EXT2_CHECK_MAGIC(channel, EXT2_ET_MAGIC_IO_CHANNEL);
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data = (struct test_private_data *) channel->private_data;
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EXT2_CHECK_MAGIC(data, EXT2_ET_MAGIC_TEST_IO_CHANNEL);
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if (data->real && data->real->manager->get_stats) {
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retval = (data->real->manager->get_stats)(data->real, stats);
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}
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return retval;
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}
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static errcode_t test_discard(io_channel channel, unsigned long long block,
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unsigned long long count)
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{
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struct test_private_data *data;
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|
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_discard(data->real, block, count);
|
|
if (data->flags & TEST_FLAG_DISCARD)
|
|
fprintf(data->outfile,
|
|
"Test_io: discard(%llu, %llu) returned %s\n",
|
|
block, count, retval ? error_message(retval) : "OK");
|
|
return retval;
|
|
}
|
|
|
|
static errcode_t test_cache_readahead(io_channel channel,
|
|
unsigned long long block,
|
|
unsigned long long count)
|
|
{
|
|
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_cache_readahead(data->real, block, count);
|
|
if (data->flags & TEST_FLAG_READAHEAD)
|
|
fprintf(data->outfile,
|
|
"Test_io: readahead(%llu, %llu) returned %s\n",
|
|
block, count, retval ? error_message(retval) : "OK");
|
|
return retval;
|
|
}
|
|
|
|
static errcode_t test_zeroout(io_channel channel, unsigned long long block,
|
|
unsigned long long count)
|
|
{
|
|
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_zeroout(data->real, block, count);
|
|
if (data->flags & TEST_FLAG_ZEROOUT)
|
|
fprintf(data->outfile,
|
|
"Test_io: zeroout(%llu, %llu) returned %s\n",
|
|
block, count, retval ? error_message(retval) : "OK");
|
|
return retval;
|
|
}
|
|
|
|
static struct struct_io_manager struct_test_manager = {
|
|
.magic = EXT2_ET_MAGIC_IO_MANAGER,
|
|
.name = "Test I/O Manager",
|
|
.open = test_open,
|
|
.close = test_close,
|
|
.set_blksize = test_set_blksize,
|
|
.read_blk = test_read_blk,
|
|
.write_blk = test_write_blk,
|
|
.flush = test_flush,
|
|
.write_byte = test_write_byte,
|
|
.set_option = test_set_option,
|
|
.get_stats = test_get_stats,
|
|
.read_blk64 = test_read_blk64,
|
|
.write_blk64 = test_write_blk64,
|
|
.discard = test_discard,
|
|
.cache_readahead = test_cache_readahead,
|
|
.zeroout = test_zeroout,
|
|
};
|
|
|
|
io_manager test_io_manager = &struct_test_manager;
|