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Diffstat (limited to 'src/dev/disk_image.cc')
| -rw-r--r-- | src/dev/disk_image.cc | 431 |
1 files changed, 0 insertions, 431 deletions
diff --git a/src/dev/disk_image.cc b/src/dev/disk_image.cc deleted file mode 100644 index e4907853f..000000000 --- a/src/dev/disk_image.cc +++ /dev/null @@ -1,431 +0,0 @@ -/* - * Copyright (c) 2001-2005 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * Authors: Nathan Binkert - */ - -/** @file - * Disk Image Definitions - */ - -#include <sys/types.h> -#include <sys/uio.h> -#include <unistd.h> - -#include <cerrno> -#include <cstring> -#include <fstream> -#include <string> - -#include "base/callback.hh" -#include "base/misc.hh" -#include "base/trace.hh" -#include "debug/DiskImageRead.hh" -#include "debug/DiskImageWrite.hh" -#include "dev/disk_image.hh" -#include "sim/byteswap.hh" -#include "sim/sim_exit.hh" - -using namespace std; - -//////////////////////////////////////////////////////////////////////// -// -// Raw Disk image -// -RawDiskImage::RawDiskImage(const Params* p) - : DiskImage(p), disk_size(0) -{ open(p->image_file, p->read_only); } - -RawDiskImage::~RawDiskImage() -{ close(); } - -void -RawDiskImage::open(const string &filename, bool rd_only) -{ - if (!filename.empty()) { - initialized = true; - readonly = rd_only; - file = filename; - - ios::openmode mode = ios::in | ios::binary; - if (!readonly) - mode |= ios::out; - stream.open(file.c_str(), mode); - if (!stream.is_open()) - panic("Error opening %s", filename); - } -} - -void -RawDiskImage::close() -{ - stream.close(); -} - -std::streampos -RawDiskImage::size() const -{ - if (disk_size == 0) { - if (!stream.is_open()) - panic("file not open!\n"); - stream.seekg(0, ios::end); - disk_size = stream.tellg(); - } - - return disk_size / SectorSize; -} - -std::streampos -RawDiskImage::read(uint8_t *data, std::streampos offset) const -{ - if (!initialized) - panic("RawDiskImage not initialized"); - - if (!stream.is_open()) - panic("file not open!\n"); - - stream.seekg(offset * SectorSize, ios::beg); - if (!stream.good()) - panic("Could not seek to location in file"); - - streampos pos = stream.tellg(); - stream.read((char *)data, SectorSize); - - DPRINTF(DiskImageRead, "read: offset=%d\n", (uint64_t)offset); - DDUMP(DiskImageRead, data, SectorSize); - - return stream.tellg() - pos; -} - -std::streampos -RawDiskImage::write(const uint8_t *data, std::streampos offset) -{ - if (!initialized) - panic("RawDiskImage not initialized"); - - if (readonly) - panic("Cannot write to a read only disk image"); - - if (!stream.is_open()) - panic("file not open!\n"); - - stream.seekp(offset * SectorSize, ios::beg); - if (!stream.good()) - panic("Could not seek to location in file"); - - DPRINTF(DiskImageWrite, "write: offset=%d\n", (uint64_t)offset); - DDUMP(DiskImageWrite, data, SectorSize); - - streampos pos = stream.tellp(); - stream.write((const char *)data, SectorSize); - return stream.tellp() - pos; -} - -RawDiskImage * -RawDiskImageParams::create() -{ - return new RawDiskImage(this); -} - -//////////////////////////////////////////////////////////////////////// -// -// Copy on Write Disk image -// -const uint32_t CowDiskImage::VersionMajor = 1; -const uint32_t CowDiskImage::VersionMinor = 0; - -class CowDiskCallback : public Callback -{ - private: - CowDiskImage *image; - - public: - CowDiskCallback(CowDiskImage *i) : image(i) {} - void process() { image->save(); delete this; } -}; - -CowDiskImage::CowDiskImage(const Params *p) - : DiskImage(p), filename(p->image_file), child(p->child), table(NULL) -{ - if (filename.empty()) { - initSectorTable(p->table_size); - } else { - if (!open(filename)) { - if (p->read_only) - fatal("could not open read-only file"); - initSectorTable(p->table_size); - } - - if (!p->read_only) - registerExitCallback(new CowDiskCallback(this)); - } -} - -CowDiskImage::~CowDiskImage() -{ - SectorTable::iterator i = table->begin(); - SectorTable::iterator end = table->end(); - - while (i != end) { - delete (*i).second; - ++i; - } -} - -void -SafeRead(ifstream &stream, void *data, int count) -{ - stream.read((char *)data, count); - if (!stream.is_open()) - panic("file not open"); - - if (stream.eof()) - panic("premature end-of-file"); - - if (stream.bad() || stream.fail()) - panic("error reading cowdisk image"); -} - -template<class T> -void -SafeRead(ifstream &stream, T &data) -{ - SafeRead(stream, &data, sizeof(data)); -} - -template<class T> -void -SafeReadSwap(ifstream &stream, T &data) -{ - SafeRead(stream, &data, sizeof(data)); - data = letoh(data); //is this the proper byte order conversion? -} - -bool -CowDiskImage::open(const string &file) -{ - ifstream stream(file.c_str()); - if (!stream.is_open()) - return false; - - if (stream.fail() || stream.bad()) - panic("Error opening %s", file); - - uint64_t magic; - SafeRead(stream, magic); - - if (memcmp(&magic, "COWDISK!", sizeof(magic)) != 0) - panic("Could not open %s: Invalid magic", file); - - uint32_t major, minor; - SafeReadSwap(stream, major); - SafeReadSwap(stream, minor); - - if (major != VersionMajor && minor != VersionMinor) - panic("Could not open %s: invalid version %d.%d != %d.%d", - file, major, minor, VersionMajor, VersionMinor); - - uint64_t sector_count; - SafeReadSwap(stream, sector_count); - table = new SectorTable(sector_count); - - - for (uint64_t i = 0; i < sector_count; i++) { - uint64_t offset; - SafeReadSwap(stream, offset); - - Sector *sector = new Sector; - SafeRead(stream, sector, sizeof(Sector)); - - assert(table->find(offset) == table->end()); - (*table)[offset] = sector; - } - - stream.close(); - - initialized = true; - return true; -} - -void -CowDiskImage::initSectorTable(int hash_size) -{ - table = new SectorTable(hash_size); - - initialized = true; -} - -void -SafeWrite(ofstream &stream, const void *data, int count) -{ - stream.write((const char *)data, count); - if (!stream.is_open()) - panic("file not open"); - - if (stream.eof()) - panic("premature end-of-file"); - - if (stream.bad() || stream.fail()) - panic("error reading cowdisk image"); -} - -template<class T> -void -SafeWrite(ofstream &stream, const T &data) -{ - SafeWrite(stream, &data, sizeof(data)); -} - -template<class T> -void -SafeWriteSwap(ofstream &stream, const T &data) -{ - T swappeddata = letoh(data); //is this the proper byte order conversion? - SafeWrite(stream, &swappeddata, sizeof(data)); -} -void -CowDiskImage::save() const -{ - save(filename); -} - -void -CowDiskImage::save(const string &file) const -{ - if (!initialized) - panic("RawDiskImage not initialized"); - - ofstream stream(file.c_str()); - if (!stream.is_open() || stream.fail() || stream.bad()) - panic("Error opening %s", file); - - uint64_t magic; - memcpy(&magic, "COWDISK!", sizeof(magic)); - SafeWrite(stream, magic); - - SafeWriteSwap(stream, (uint32_t)VersionMajor); - SafeWriteSwap(stream, (uint32_t)VersionMinor); - SafeWriteSwap(stream, (uint64_t)table->size()); - - uint64_t size = table->size(); - SectorTable::iterator iter = table->begin(); - SectorTable::iterator end = table->end(); - - for (uint64_t i = 0; i < size; i++) { - if (iter == end) - panic("Incorrect Table Size during save of COW disk image"); - - SafeWriteSwap(stream, (uint64_t)(*iter).first); - SafeWrite(stream, (*iter).second->data, sizeof(Sector)); - ++iter; - } - - stream.close(); -} - -void -CowDiskImage::writeback() -{ - SectorTable::iterator i = table->begin(); - SectorTable::iterator end = table->end(); - - while (i != end) { - child->write((*i).second->data, (*i).first); - ++i; - } -} - -std::streampos -CowDiskImage::size() const -{ return child->size(); } - -std::streampos -CowDiskImage::read(uint8_t *data, std::streampos offset) const -{ - if (!initialized) - panic("CowDiskImage not initialized"); - - if (offset > size()) - panic("access out of bounds"); - - SectorTable::const_iterator i = table->find(offset); - if (i == table->end()) - return child->read(data, offset); - else { - memcpy(data, (*i).second->data, SectorSize); - DPRINTF(DiskImageRead, "read: offset=%d\n", (uint64_t)offset); - DDUMP(DiskImageRead, data, SectorSize); - return SectorSize; - } -} - -std::streampos -CowDiskImage::write(const uint8_t *data, std::streampos offset) -{ - if (!initialized) - panic("RawDiskImage not initialized"); - - if (offset > size()) - panic("access out of bounds"); - - SectorTable::iterator i = table->find(offset); - if (i == table->end()) { - Sector *sector = new Sector; - memcpy(sector, data, SectorSize); - table->insert(make_pair(offset, sector)); - } else { - memcpy((*i).second->data, data, SectorSize); - } - - DPRINTF(DiskImageWrite, "write: offset=%d\n", (uint64_t)offset); - DDUMP(DiskImageWrite, data, SectorSize); - - return SectorSize; -} - -void -CowDiskImage::serialize(CheckpointOut &cp) const -{ - string cowFilename = name() + ".cow"; - SERIALIZE_SCALAR(cowFilename); - save(CheckpointIn::dir() + "/" + cowFilename); -} - -void -CowDiskImage::unserialize(CheckpointIn &cp) -{ - string cowFilename; - UNSERIALIZE_SCALAR(cowFilename); - cowFilename = cp.cptDir + "/" + cowFilename; - open(cowFilename); -} - -CowDiskImage * -CowDiskImageParams::create() -{ - return new CowDiskImage(this); -} |