test/vpnor/write_flash_vpnor.cpp

/*
 * MBox Daemon Test File
 *
 * Copyright 2017 IBM
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

extern "C" {
#include "config.h"
#include "common.h"
#include "mboxd_flash.h"
#include "mboxd_pnor_partition_table.h"
#include "mbox.h"
#include "test/tmpf.h"
}

#include <assert.h>
#include <unistd.h>

#include <fstream>
#include <experimental/filesystem>

#include <sys/mman.h>
#include <sys/syslog.h>
#include <sys/ioctl.h>
#include <fcntl.h>

#include "test/vpnor/tmpd.hpp"

uint8_t data[8] = {0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7};

#define BLOCK_SIZE 4096
#define OFFSET BLOCK_SIZE
#define MEM_SIZE (BLOCK_SIZE * 2)
#define DATA_SIZE sizeof(data)
#define BLOCK_SIZE_SHIFT 12

const std::string toc[] = {
    "partition01=TEST1,00001000,00001400,ECC,READONLY",
    "partition02=TEST2,00002000,00002008,ECC,READWRITE",
    "partition03=TEST3,00003000,00003400,ECC,PRESERVED",
};

std::vector<std::string> partitions = {"TEST1", "TEST2", "TEST3"};

namespace test = openpower::virtual_pnor::test;

void init(struct mbox_context* ctx, test::VpnorRoot& root)
{
    namespace fs = std::experimental::filesystem;
    using namespace std::string_literals;

    // create the partition files in the ro directory
    for (auto partition : partitions)
    {
        root.write(partition, data, sizeof(data));
    }

    // copy partition2 file from ro to rw
    assert(fs::copy_file(root.ro() / "TEST2", root.rw() / "TEST2"));

    mbox_vlog = &mbox_log_console;
    verbosity = (verbose)2;

    // setting context parameters
    ctx->erase_size_shift = BLOCK_SIZE_SHIFT;
    ctx->block_size_shift = BLOCK_SIZE_SHIFT;
    ctx->flash_bmap = reinterpret_cast<uint8_t*>(
        calloc(MEM_SIZE >> ctx->erase_size_shift, sizeof(*ctx->flash_bmap)));
}

int main(void)
{
    namespace fs = std::experimental::filesystem;

    int rc{};
    int fd;
    void* map;
    char src[DATA_SIZE]{0};
    struct mbox_context context;
    struct mbox_context* ctx = &context;
    memset(ctx, 0, sizeof(mbox_context));

    test::VpnorRoot root(ctx, toc, BLOCK_SIZE);

    // Initialize the context before running the test case.
    init(ctx, root);

    // create the partition table
    vpnor_create_partition_table_from_path(ctx, root.ro().c_str());

    // Write to the RO partition
    memset(src, 0x55, sizeof(src));
    fd = open((root.ro() / "TEST1").c_str(), O_RDONLY);
    map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE, fd, 0);
    assert(map != MAP_FAILED);
    rc = write_flash(ctx, (OFFSET), src, sizeof(src));
    // Should not be allowed to write on RO
    assert(rc != 0);

    munmap(map, MEM_SIZE);
    close(fd);

    // Write to the RW partition
    memset(src, 0xbb, sizeof(src));
    fd = open((root.rw() / "TEST2").c_str(), O_RDONLY);
    map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE, fd, 0);
    assert(map != MAP_FAILED);
    rc = write_flash(ctx, (OFFSET * 2), src, sizeof(src));
    assert(rc == 0);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);

    // write beyond the partition length as the partition
    // file length is 8 byte(TEST2).
    rc = write_flash(ctx, (OFFSET * 2 + 3), src, sizeof(src) + 20);
    assert(rc == -1);

    memset(src, 0xcc, sizeof(src));
    rc = write_flash(ctx, (OFFSET * 2), src, sizeof(src));
    assert(rc == 0);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);

    src[0] = 0xff;
    rc = write_flash(ctx, (OFFSET * 2), src, 1);
    assert(rc == 0);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);

    src[1] = 0xff;
    rc = write_flash(ctx, (OFFSET * 2) + 1, &src[1], 1);
    assert(rc == 0);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);

    src[2] = 0xff;
    rc = write_flash(ctx, (OFFSET * 2) + 2, &src[2], 1);
    assert(rc == 0);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);

    munmap(map, MEM_SIZE);
    close(fd);

    // START Test patch location - Patch dir has preference over other locations
    // Copy partition2 file from ro to patch to simulate a patch file that is
    // different from the one in rw (partition2 in rw was modified with the
    // previous write test)
    fs::path patch = root.patch() / "TEST2";
    assert(fs::copy_file(root.ro() / "TEST2", patch));

    // Write arbitrary data
    char srcPatch[DATA_SIZE]{0};
    memset(srcPatch, 0x33, sizeof(srcPatch));
    rc = write_flash(ctx, (OFFSET * 2), srcPatch, sizeof(srcPatch));
    assert(rc == 0);

    // Check that partition file in RW location still contains the original data
    fd = open((root.rw() / "TEST2").c_str(), O_RDONLY);
    map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE, fd, 0);
    assert(map != MAP_FAILED);
    rc = memcmp(src, map, sizeof(src));
    assert(rc == 0);
    munmap(map, MEM_SIZE);
    close(fd);

    // Check that partition file in PATCH location was written with the new data
    fd = open(patch.c_str(), O_RDONLY);
    map = mmap(NULL, MEM_SIZE, PROT_READ, MAP_PRIVATE, fd, 0);
    assert(map != MAP_FAILED);
    rc = memcmp(srcPatch, map, sizeof(srcPatch));
    assert(rc == 0);
    munmap(map, MEM_SIZE);
    close(fd);

    destroy_vpnor(ctx);
    free(ctx->flash_bmap);

    return rc;
}