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Serialization support for cow images

Browse source 
dev/disk_image.cc:
dev/disk_image.hh:
    Serialization of cow images

--HG--
extra : convert_revision : 144179b8cad00b32df8c448a8556a465e24737aa
This commit is contained in:
Ron Dreslinski 2003-10-30 16:48:23 -05:00
parent fd232ecb6a
commit 1044b29a1d
2 changed files with 34 additions and 9 deletions
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38
dev/disk_image.cc
View file

@ -190,7 +190,7 @@ CowDiskImage::CowDiskImage(const string &name, DiskImage *kid, int hash_size,
const string &file, bool read_only)
: DiskImage(name), filename(file), child(kid), table(NULL)
{
if (!open()) {
if (!open(filename)) {
assert(!read_only && "why have a non-existent read only file?");
init(hash_size);
}
@ -230,20 +230,20 @@ SafeRead(ifstream &stream, T &data)
{ SafeRead(stream, &data, sizeof(data)); }
bool
CowDiskImage::open()
CowDiskImage::open(const string &file)
{
ifstream stream(filename.c_str());
ifstream stream(file.c_str());
if (!stream.is_open())
return false;
if (stream.fail() || stream.bad())
panic("Error opening %s", filename);
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", filename);
panic("Could not open %s: Invalid magic", file);
uint32_t major, minor;
SafeRead(stream, major);
@ -251,7 +251,7 @@ CowDiskImage::open()
if (major != VersionMajor && minor != VersionMinor)
panic("Could not open %s: invalid version %d.%d != %d.%d",
filename, major, minor, VersionMajor, VersionMinor);
file, major, minor, VersionMajor, VersionMinor);
uint64_t sector_count;
SafeRead(stream, sector_count);
@ -304,13 +304,19 @@ SafeWrite(ofstream &stream, const T &data)
void
CowDiskImage::save()
{
save(filename);
}
void
CowDiskImage::save(const string &file)
{
if (!initialized)
panic("RawDiskImage not initialized");
ofstream stream(filename.c_str());
ofstream stream(file.c_str());
if (!stream.is_open() || stream.fail() || stream.bad())
panic("Error opening %s", filename);
panic("Error opening %s", file);
uint64_t magic;
memcpy(&magic, "COWDISK!", sizeof(magic));
@ -396,6 +402,22 @@ CowDiskImage::write(const uint8_t *data, off_t offset)
return SectorSize;
}
void
CowDiskImage::serialize(ostream &os)
{
string cowFilename = serializeFilename + ".cow";
SERIALIZE_SCALAR(cowFilename);
save(cowFilename);
}
void
CowDiskImage::unserialize(Checkpoint *cp, const string &section)
{
string cowFilename;
UNSERIALIZE_SCALAR(cowFilename);
open(cowFilename);
}
BEGIN_DECLARE_SIM_OBJECT_PARAMS(CowDiskImage)
SimObjectParam<DiskImage *> child;

5
dev/disk_image.hh
View file

@ -117,9 +117,12 @@ class CowDiskImage : public DiskImage
~CowDiskImage();
void init(int hash_size);
bool open();
bool open(const std::string &file);
void save();
void save(const std::string &file);
void writeback();
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string &section);
virtual off_t size() const;