Update copyright dates and author list SConscript: arch/alpha/alpha_linux_process.cc: arch/alpha/alpha_linux_process.hh: arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/alpha_tru64_process.cc: arch/alpha/alpha_tru64_process.hh: arch/alpha/aout_machdep.h: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/ev5.cc: arch/alpha/ev5.hh: arch/alpha/faults.cc: arch/alpha/faults.hh: arch/alpha/isa_desc: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/osfpal.hh: arch/alpha/pseudo_inst.cc: arch/alpha/pseudo_inst.hh: arch/alpha/vptr.hh: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/bitfield.hh: base/callback.hh: base/circlebuf.cc: base/circlebuf.hh: base/cprintf.cc: base/cprintf.hh: base/cprintf_formats.hh: base/crc.hh: base/date.cc: base/dbl_list.hh: base/endian.hh: base/fast_alloc.cc: base/fast_alloc.hh: base/fifo_buffer.cc: base/fifo_buffer.hh: base/hashmap.hh: base/hostinfo.cc: base/hostinfo.hh: base/hybrid_pred.cc: base/hybrid_pred.hh: base/inet.cc: base/inet.hh: base/inifile.cc: base/inifile.hh: base/intmath.cc: base/intmath.hh: base/match.cc: base/match.hh: base/misc.cc: base/misc.hh: base/mod_num.hh: base/mysql.cc: base/mysql.hh: base/output.cc: base/output.hh: base/pollevent.cc: base/pollevent.hh: base/predictor.hh: base/random.cc: base/random.hh: base/range.cc: base/range.hh: base/refcnt.hh: base/remote_gdb.cc: base/remote_gdb.hh: base/res_list.hh: base/sat_counter.cc: base/sat_counter.hh: base/sched_list.hh: base/socket.cc: base/socket.hh: base/statistics.cc: base/statistics.hh: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/compression/null_compression.hh: base/loader/aout_object.cc: base/loader/aout_object.hh: base/loader/ecoff_object.cc: base/loader/ecoff_object.hh: base/loader/elf_object.cc: base/loader/elf_object.hh: base/loader/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/stats/events.cc: base/stats/events.hh: base/stats/flags.hh: base/stats/mysql.cc: base/stats/mysql.hh: base/stats/mysql_run.hh: base/stats/output.hh: base/stats/statdb.cc: base/stats/statdb.hh: base/stats/text.cc: base/stats/text.hh: base/stats/types.hh: base/stats/visit.cc: base/stats/visit.hh: base/str.cc: base/str.hh: base/time.cc: base/time.hh: base/timebuf.hh: base/trace.cc: base/trace.hh: base/userinfo.cc: base/userinfo.hh: build/SConstruct: cpu/base.cc: cpu/base.hh: cpu/base_dyn_inst.cc: cpu/base_dyn_inst.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/inst_seq.hh: cpu/intr_control.cc: cpu/intr_control.hh: cpu/memtest/memtest.cc: cpu/pc_event.cc: cpu/pc_event.hh: cpu/smt.hh: cpu/static_inst.cc: cpu/static_inst.hh: cpu/memtest/memtest.hh: cpu/o3/sat_counter.cc: cpu/o3/sat_counter.hh: cpu/ozone/cpu.hh: cpu/simple/cpu.cc: cpu/simple/cpu.hh: cpu/trace/opt_cpu.cc: cpu/trace/opt_cpu.hh: cpu/trace/reader/ibm_reader.cc: cpu/trace/reader/ibm_reader.hh: cpu/trace/reader/itx_reader.cc: cpu/trace/reader/itx_reader.hh: cpu/trace/reader/m5_reader.cc: cpu/trace/reader/m5_reader.hh: cpu/trace/reader/mem_trace_reader.cc: cpu/trace/reader/mem_trace_reader.hh: cpu/trace/trace_cpu.cc: cpu/trace/trace_cpu.hh: dev/alpha_access.h: dev/alpha_console.cc: dev/alpha_console.hh: dev/baddev.cc: dev/baddev.hh: dev/disk_image.cc: dev/disk_image.hh: dev/etherbus.cc: dev/etherbus.hh: dev/etherdump.cc: dev/etherdump.hh: dev/etherint.cc: dev/etherint.hh: dev/etherlink.cc: dev/etherlink.hh: dev/etherpkt.cc: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/ide_ctrl.cc: dev/ide_ctrl.hh: dev/ide_disk.cc: dev/ide_disk.hh: dev/io_device.cc: dev/io_device.hh: dev/ns_gige.cc: dev/ns_gige.hh: dev/ns_gige_reg.h: dev/pciconfigall.cc: dev/pciconfigall.hh: dev/pcidev.cc: dev/pcidev.hh: dev/pcireg.h: dev/pktfifo.cc: dev/pktfifo.hh: dev/platform.cc: dev/platform.hh: dev/simconsole.cc: dev/simconsole.hh: dev/simple_disk.cc: dev/simple_disk.hh: dev/sinic.cc: dev/sinic.hh: dev/sinicreg.hh: dev/tsunami.cc: dev/tsunami.hh: dev/tsunami_cchip.cc: dev/tsunami_cchip.hh: dev/tsunami_io.cc: dev/tsunami_io.hh: dev/tsunami_pchip.cc: dev/tsunami_pchip.hh: dev/tsunamireg.h: dev/uart.cc: dev/uart.hh: dev/uart8250.cc: dev/uart8250.hh: docs/stl.hh: encumbered/cpu/full/op_class.hh: kern/kernel_stats.cc: kern/kernel_stats.hh: kern/linux/linux.hh: kern/linux/linux_syscalls.cc: kern/linux/linux_syscalls.hh: kern/linux/linux_system.cc: kern/linux/linux_system.hh: kern/linux/linux_threadinfo.hh: kern/linux/printk.cc: kern/linux/printk.hh: kern/system_events.cc: kern/system_events.hh: kern/tru64/dump_mbuf.cc: kern/tru64/dump_mbuf.hh: kern/tru64/mbuf.hh: kern/tru64/printf.cc: kern/tru64/printf.hh: kern/tru64/tru64.hh: kern/tru64/tru64_events.cc: kern/tru64/tru64_events.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: kern/tru64/tru64_system.cc: kern/tru64/tru64_system.hh: python/SConscript: python/m5/__init__.py: python/m5/config.py: python/m5/convert.py: python/m5/multidict.py: python/m5/smartdict.py: sim/async.hh: sim/builder.cc: sim/builder.hh: sim/debug.cc: sim/debug.hh: sim/eventq.cc: sim/eventq.hh: sim/host.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/process.cc: sim/process.hh: sim/root.cc: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_exit.hh: sim/sim_object.cc: sim/sim_object.hh: sim/startup.cc: sim/startup.hh: sim/stat_control.cc: sim/stat_control.hh: sim/stats.hh: sim/syscall_emul.cc: sim/syscall_emul.hh: sim/system.cc: sim/system.hh: test/bitvectest.cc: test/circletest.cc: test/cprintftest.cc: test/genini.py: test/initest.cc: test/lru_test.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/sized_test.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/ccdrv/devtime.c: util/m5/m5.c: util/oprofile-top.py: util/rundiff: util/m5/m5op.h: util/m5/m5op.s: util/stats/db.py: util/stats/dbinit.py: util/stats/display.py: util/stats/info.py: util/stats/print.py: util/stats/stats.py: util/tap/tap.cc: Update copyright dates and author list --HG-- extra : convert_revision : 0faba08fc0fc0146f1efb7f61e4b043c020ff9e4
471 lines
12 KiB
C++
471 lines
12 KiB
C++
/*
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file
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* Disk Image Definitions
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*/
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <cstdio>
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#include <cstring>
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#include <fstream>
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#include <string>
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#include "base/callback.hh"
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#include "base/misc.hh"
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#include "base/trace.hh"
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#include "dev/disk_image.hh"
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#include "sim/builder.hh"
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#include "sim/sim_exit.hh"
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#include "targetarch/byte_swap.hh"
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using namespace std;
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////////////////////////////////////////////////////////////////////////
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//
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// Raw Disk image
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//
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RawDiskImage::RawDiskImage(const string &name, const string &filename,
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bool rd_only)
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: DiskImage(name), disk_size(0)
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{ open(filename, rd_only); }
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RawDiskImage::~RawDiskImage()
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{ close(); }
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void
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RawDiskImage::open(const string &filename, bool rd_only)
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{
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if (!filename.empty()) {
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initialized = true;
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readonly = rd_only;
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file = filename;
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ios::openmode mode = ios::in | ios::binary;
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if (!readonly)
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mode |= ios::out;
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stream.open(file.c_str(), mode);
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if (!stream.is_open())
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panic("Error opening %s", filename);
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}
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}
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void
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RawDiskImage::close()
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{
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stream.close();
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}
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off_t
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RawDiskImage::size() const
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{
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if (disk_size == 0) {
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if (!stream.is_open())
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panic("file not open!\n");
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stream.seekg(0, ios::end);
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disk_size = stream.tellg();
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}
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return disk_size / SectorSize;
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}
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off_t
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RawDiskImage::read(uint8_t *data, off_t offset) const
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{
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if (!initialized)
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panic("RawDiskImage not initialized");
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if (!stream.is_open())
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panic("file not open!\n");
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if (stream.seekg(offset * SectorSize, ios::beg) < 0)
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panic("Could not seek to location in file");
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streampos pos = stream.tellg();
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stream.read((char *)data, SectorSize);
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DPRINTF(DiskImageRead, "read: offset=%d\n", (uint64_t)offset);
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DDUMP(DiskImageRead, data, SectorSize);
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return stream.tellg() - pos;
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}
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off_t
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RawDiskImage::write(const uint8_t *data, off_t offset)
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{
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if (!initialized)
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panic("RawDiskImage not initialized");
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if (readonly)
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panic("Cannot write to a read only disk image");
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if (!stream.is_open())
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panic("file not open!\n");
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if (stream.seekp(offset * SectorSize, ios::beg) < 0)
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panic("Could not seek to location in file");
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DPRINTF(DiskImageWrite, "write: offset=%d\n", (uint64_t)offset);
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DDUMP(DiskImageWrite, data, SectorSize);
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streampos pos = stream.tellp();
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stream.write((const char *)data, SectorSize);
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return stream.tellp() - pos;
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}
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DEFINE_SIM_OBJECT_CLASS_NAME("DiskImage", DiskImage)
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BEGIN_DECLARE_SIM_OBJECT_PARAMS(RawDiskImage)
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Param<string> image_file;
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Param<bool> read_only;
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END_DECLARE_SIM_OBJECT_PARAMS(RawDiskImage)
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BEGIN_INIT_SIM_OBJECT_PARAMS(RawDiskImage)
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INIT_PARAM(image_file, "disk image file"),
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INIT_PARAM_DFLT(read_only, "read only image", false)
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END_INIT_SIM_OBJECT_PARAMS(RawDiskImage)
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CREATE_SIM_OBJECT(RawDiskImage)
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{
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return new RawDiskImage(getInstanceName(), image_file, read_only);
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}
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REGISTER_SIM_OBJECT("RawDiskImage", RawDiskImage)
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////////////////////////////////////////////////////////////////////////
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//
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// Copy on Write Disk image
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//
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const int CowDiskImage::VersionMajor = 1;
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const int CowDiskImage::VersionMinor = 0;
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CowDiskImage::CowDiskImage(const string &name, DiskImage *kid, int hash_size)
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: DiskImage(name), child(kid), table(NULL)
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{ init(hash_size); }
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class CowDiskCallback : public Callback
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{
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private:
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CowDiskImage *image;
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public:
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CowDiskCallback(CowDiskImage *i) : image(i) {}
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void process() { image->save(); delete this; }
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};
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CowDiskImage::CowDiskImage(const string &name, DiskImage *kid, int hash_size,
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const string &file, bool read_only)
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: DiskImage(name), filename(file), child(kid), table(NULL)
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{
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if (!open(filename)) {
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assert(!read_only && "why have a non-existent read only file?");
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init(hash_size);
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}
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if (!read_only)
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registerExitCallback(new CowDiskCallback(this));
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}
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CowDiskImage::~CowDiskImage()
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{
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SectorTable::iterator i = table->begin();
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SectorTable::iterator end = table->end();
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while (i != end) {
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delete (*i).second;
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++i;
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}
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}
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void
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SafeRead(ifstream &stream, void *data, int count)
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{
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stream.read((char *)data, count);
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if (!stream.is_open())
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panic("file not open");
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if (stream.eof())
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panic("premature end-of-file");
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if (stream.bad() || stream.fail())
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panic("error reading cowdisk image");
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}
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template<class T>
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void
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SafeRead(ifstream &stream, T &data)
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{
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SafeRead(stream, &data, sizeof(data));
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}
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template<class T>
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void
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SafeReadSwap(ifstream &stream, T &data)
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{
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SafeRead(stream, &data, sizeof(data));
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data = htoa(data);
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}
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bool
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CowDiskImage::open(const string &file)
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{
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ifstream stream(file.c_str());
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if (!stream.is_open())
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return false;
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if (stream.fail() || stream.bad())
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panic("Error opening %s", file);
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uint64_t magic;
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SafeRead(stream, magic);
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if (memcmp(&magic, "COWDISK!", sizeof(magic)) != 0)
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panic("Could not open %s: Invalid magic", file);
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uint32_t major, minor;
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SafeReadSwap(stream, major);
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SafeReadSwap(stream, minor);
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if (major != VersionMajor && minor != VersionMinor)
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panic("Could not open %s: invalid version %d.%d != %d.%d",
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file, major, minor, VersionMajor, VersionMinor);
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uint64_t sector_count;
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SafeReadSwap(stream, sector_count);
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table = new SectorTable(sector_count);
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for (uint64_t i = 0; i < sector_count; i++) {
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uint64_t offset;
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SafeReadSwap(stream, offset);
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Sector *sector = new Sector;
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SafeRead(stream, sector, sizeof(Sector));
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assert(table->find(offset) == table->end());
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(*table)[offset] = sector;
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}
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stream.close();
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initialized = true;
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return true;
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}
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void
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CowDiskImage::init(int hash_size)
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{
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table = new SectorTable(hash_size);
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initialized = true;
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}
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void
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SafeWrite(ofstream &stream, const void *data, int count)
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{
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stream.write((const char *)data, count);
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if (!stream.is_open())
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panic("file not open");
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if (stream.eof())
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panic("premature end-of-file");
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if (stream.bad() || stream.fail())
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panic("error reading cowdisk image");
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}
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template<class T>
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void
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SafeWrite(ofstream &stream, const T &data)
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{
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SafeWrite(stream, &data, sizeof(data));
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}
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template<class T>
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void
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SafeWriteSwap(ofstream &stream, const T &data)
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{
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T swappeddata = htoa(data);
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SafeWrite(stream, &swappeddata, sizeof(data));
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}
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void
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CowDiskImage::save()
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{
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save(filename);
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}
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void
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CowDiskImage::save(const string &file)
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{
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if (!initialized)
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panic("RawDiskImage not initialized");
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ofstream stream(file.c_str());
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if (!stream.is_open() || stream.fail() || stream.bad())
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panic("Error opening %s", file);
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uint64_t magic;
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memcpy(&magic, "COWDISK!", sizeof(magic));
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SafeWrite(stream, magic);
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SafeWriteSwap(stream, (uint32_t)VersionMajor);
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SafeWriteSwap(stream, (uint32_t)VersionMinor);
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SafeWriteSwap(stream, (uint64_t)table->size());
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uint64_t size = table->size();
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SectorTable::iterator iter = table->begin();
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SectorTable::iterator end = table->end();
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for (uint64_t i = 0; i < size; i++) {
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if (iter == end)
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panic("Incorrect Table Size during save of COW disk image");
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SafeWriteSwap(stream, (uint64_t)(*iter).first);
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SafeWrite(stream, (*iter).second->data, sizeof(Sector));
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++iter;
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}
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stream.close();
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}
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void
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CowDiskImage::writeback()
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{
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SectorTable::iterator i = table->begin();
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SectorTable::iterator end = table->end();
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while (i != end) {
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child->write((*i).second->data, (*i).first);
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++i;
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}
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}
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off_t
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CowDiskImage::size() const
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{ return child->size(); }
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off_t
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CowDiskImage::read(uint8_t *data, off_t offset) const
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{
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if (!initialized)
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panic("CowDiskImage not initialized");
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if (offset > size())
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panic("access out of bounds");
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SectorTable::const_iterator i = table->find(offset);
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if (i == table->end())
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return child->read(data, offset);
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else {
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memcpy(data, (*i).second->data, SectorSize);
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DPRINTF(DiskImageRead, "read: offset=%d\n", (uint64_t)offset);
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DDUMP(DiskImageRead, data, SectorSize);
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return SectorSize;
|
|
}
|
|
}
|
|
|
|
off_t
|
|
CowDiskImage::write(const uint8_t *data, off_t 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(ostream &os)
|
|
{
|
|
string cowFilename = name() + ".cow";
|
|
SERIALIZE_SCALAR(cowFilename);
|
|
save(Checkpoint::dir() + "/" + cowFilename);
|
|
}
|
|
|
|
void
|
|
CowDiskImage::unserialize(Checkpoint *cp, const string §ion)
|
|
{
|
|
string cowFilename;
|
|
UNSERIALIZE_SCALAR(cowFilename);
|
|
cowFilename = cp->cptDir + "/" + cowFilename;
|
|
open(cowFilename);
|
|
}
|
|
|
|
BEGIN_DECLARE_SIM_OBJECT_PARAMS(CowDiskImage)
|
|
|
|
SimObjectParam<DiskImage *> child;
|
|
Param<string> image_file;
|
|
Param<int> table_size;
|
|
Param<bool> read_only;
|
|
|
|
END_DECLARE_SIM_OBJECT_PARAMS(CowDiskImage)
|
|
|
|
BEGIN_INIT_SIM_OBJECT_PARAMS(CowDiskImage)
|
|
|
|
INIT_PARAM(child, "child image"),
|
|
INIT_PARAM_DFLT(image_file, "disk image file", ""),
|
|
INIT_PARAM_DFLT(table_size, "initial table size", 65536),
|
|
INIT_PARAM_DFLT(read_only, "don't write back to the copy-on-write file",
|
|
true)
|
|
|
|
END_INIT_SIM_OBJECT_PARAMS(CowDiskImage)
|
|
|
|
|
|
CREATE_SIM_OBJECT(CowDiskImage)
|
|
{
|
|
if (((string)image_file).empty())
|
|
return new CowDiskImage(getInstanceName(), child, table_size);
|
|
else
|
|
return new CowDiskImage(getInstanceName(), child, table_size,
|
|
image_file, read_only);
|
|
}
|
|
|
|
REGISTER_SIM_OBJECT("CowDiskImage", CowDiskImage)
|