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HostFileSystem: Set all NAND folders to be saved in save states when a movie is active

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This commit is contained in:
Lobsterzelda 2022-10-19 23:40:43 -04:00
parent 0210d115c2
commit ed54e1905a
4 changed files with 155 additions and 81 deletions
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16
Source/Core/Common/ChunkFile.h
View File

@ -229,6 +229,22 @@ public:
return current;
}
// The reserved u32 is set to 0, and a pointer to it is returned.
// The caller needs to fill in the reserved u32 with the appropriate value later on, if they
// want a non-zero value there.
[[nodiscard]] u8* ReserveU32()
{
u32 temp = 0;
u8* previous_pointer = *m_ptr_current;
Do(temp);
return previous_pointer;
}
u32 GetOffsetFromPreviousPosition(u8* previous_pointer)
{
return static_cast<u32>((*m_ptr_current) - previous_pointer);
}
void Do(Common::Flag& flag)
{
bool s = flag.IsSet();

214
Source/Core/Core/IOS/FS/HostBackend/FS.cpp
View File

@ -20,9 +20,13 @@
#include "Common/Swap.h"
#include "Core/IOS/ES/ES.h"
#include "Core/IOS/IOS.h"
#include "Core/Movie.h"
#include "Core/WiiRoot.h"
namespace IOS::HLE::FS
{
constexpr u32 BUFFER_CHUNK_SIZE = 65536;
HostFileSystem::HostFilename HostFileSystem::BuildFilename(const std::string& wii_path) const
{
for (const auto& redirect : m_nand_redirects)
@ -252,99 +256,151 @@ HostFileSystem::FstEntry* HostFileSystem::GetFstEntryForPath(const std::string&
return entry;
}
void HostFileSystem::DoStateRead(PointerWrap& p, std::string start_directory_path)
{
std::string path = BuildFilename(start_directory_path).host_path;
File::DeleteDirRecursively(path);
File::CreateDir(path);
// now restore from the stream
while (1)
{
char type = 0;
p.Do(type);
if (!type)
break;
std::string file_name;
p.Do(file_name);
std::string name = path + "/" + file_name;
switch (type)
{
case 'd':
{
File::CreateDir(name);
break;
}
case 'f':
{
u32 size = 0;
p.Do(size);
File::IOFile handle(name, "wb");
char buf[BUFFER_CHUNK_SIZE];
u32 count = size;
while (count > BUFFER_CHUNK_SIZE)
{
p.DoArray(buf);
handle.WriteArray(&buf[0], BUFFER_CHUNK_SIZE);
count -= BUFFER_CHUNK_SIZE;
}
p.DoArray(&buf[0], count);
handle.WriteArray(&buf[0], count);
break;
}
}
}
}
void HostFileSystem::DoStateWriteOrMeasure(PointerWrap& p, std::string start_directory_path)
{
std::string path = BuildFilename(start_directory_path).host_path;
File::FSTEntry parent_entry = File::ScanDirectoryTree(path, true);
std::deque<File::FSTEntry> todo;
todo.insert(todo.end(), parent_entry.children.begin(), parent_entry.children.end());
while (!todo.empty())
{
File::FSTEntry& entry = todo.front();
std::string name = entry.physicalName;
name.erase(0, path.length() + 1);
char type = entry.isDirectory ? 'd' : 'f';
p.Do(type);
p.Do(name);
if (entry.isDirectory)
{
todo.insert(todo.end(), entry.children.begin(), entry.children.end());
}
else
{
u32 size = (u32)entry.size;
p.Do(size);
File::IOFile handle(entry.physicalName, "rb");
char buf[BUFFER_CHUNK_SIZE];
u32 count = size;
while (count > BUFFER_CHUNK_SIZE)
{
handle.ReadArray(&buf[0], BUFFER_CHUNK_SIZE);
p.DoArray(buf);
count -= BUFFER_CHUNK_SIZE;
}
handle.ReadArray(&buf[0], count);
p.DoArray(&buf[0], count);
}
todo.pop_front();
}
char type = 0;
p.Do(type);
}
void HostFileSystem::DoState(PointerWrap& p)
{
// Temporarily close the file, to prevent any issues with the savestating of /tmp
// Temporarily close the file, to prevent any issues with the savestating of files/folders.
for (Handle& handle : m_handles)
handle.host_file.reset();
// handle /tmp
std::string Path = BuildFilename("/tmp").host_path;
if (p.IsReadMode())
// The format for the next part of the save state is follows:
// 1. bool Movie::WasMovieActiveWhenStateSaved() &&
// WiiRoot::WasWiiRootTemporaryDirectoryWhenStateSaved()
// 2. Contents of the "/tmp" directory recursively.
// 3. u32 size_of_nand_folder_saved_below (or 0, if the root
// of the NAND folder is not savestated below).
// 4. Contents of the "/" directory recursively (or nothing, if the
// root of the NAND folder is not save stated).
// The "/" directory is only saved when a savestate is made during a movie recording
// and when the directory root is temporary (i.e. WiiSession).
// If a save state is made during a movie recording and is loaded when no movie is active,
// then a call to p.DoExternal() will be used to skip over reading the contents of the "/"
// directory (it skips over the number of bytes specified by size_of_nand_folder_saved)
bool original_save_state_made_during_movie_recording =
Movie::IsMovieActive() && Core::WiiRootIsTemporary();
p.Do(original_save_state_made_during_movie_recording);
u32 temp_val = 0;
if (!p.IsReadMode())
{
File::DeleteDirRecursively(Path);
File::CreateDir(Path);
// now restore from the stream
while (1)
DoStateWriteOrMeasure(p, "/tmp");
u8* previous_position = p.ReserveU32();
if (original_save_state_made_during_movie_recording)
{
char type = 0;
p.Do(type);
if (!type)
break;
std::string file_name;
p.Do(file_name);
std::string name = Path + "/" + file_name;
switch (type)
DoStateWriteOrMeasure(p, "/");
if (p.IsWriteMode())
{
case 'd':
{
File::CreateDir(name);
break;
}
case 'f':
{
u32 size = 0;
p.Do(size);
File::IOFile handle(name, "wb");
char buf[65536];
u32 count = size;
while (count > 65536)
{
p.DoArray(buf);
handle.WriteArray(&buf[0], 65536);
count -= 65536;
}
p.DoArray(&buf[0], count);
handle.WriteArray(&buf[0], count);
break;
}
u32 size_of_nand = p.GetOffsetFromPreviousPosition(previous_position) - sizeof(u32);
memcpy(previous_position, &size_of_nand, sizeof(u32));
}
}
}
else
else // case where we're in read mode.
{
// recurse through tmp and save dirs and files
File::FSTEntry parent_entry = File::ScanDirectoryTree(Path, true);
std::deque<File::FSTEntry> todo;
todo.insert(todo.end(), parent_entry.children.begin(), parent_entry.children.end());
while (!todo.empty())
DoStateRead(p, "/tmp");
if (!Movie::IsMovieActive() || !original_save_state_made_during_movie_recording ||
!Core::WiiRootIsTemporary() ||
(original_save_state_made_during_movie_recording !=
(Movie::IsMovieActive() && Core::WiiRootIsTemporary())))
{
File::FSTEntry& entry = todo.front();
std::string name = entry.physicalName;
name.erase(0, Path.length() + 1);
char type = entry.isDirectory ? 'd' : 'f';
p.Do(type);
p.Do(name);
if (entry.isDirectory)
{
todo.insert(todo.end(), entry.children.begin(), entry.children.end());
}
else
{
u32 size = (u32)entry.size;
p.Do(size);
File::IOFile handle(entry.physicalName, "rb");
char buf[65536];
u32 count = size;
while (count > 65536)
{
handle.ReadArray(&buf[0], 65536);
p.DoArray(buf);
count -= 65536;
}
handle.ReadArray(&buf[0], count);
p.DoArray(&buf[0], count);
}
todo.pop_front();
(void)p.DoExternal(temp_val);
}
else
{
p.Do(temp_val);
if (Movie::IsMovieActive() && Core::WiiRootIsTemporary())
DoStateRead(p, "/");
}
char type = 0;
p.Do(type);
}
for (Handle& handle : m_handles)

4
Source/Core/Core/IOS/FS/HostBackend/FS.h
View File

@ -59,10 +59,12 @@ public:
void SetNandRedirects(std::vector<NandRedirect> nand_redirects) override;
private:
void DoStateWriteOrMeasure(PointerWrap& p, std::string start_directory_path);
void DoStateRead(PointerWrap& p, std::string start_directory_path);
struct FstEntry
{
bool CheckPermission(Uid uid, Gid gid, Mode requested_mode) const;
std::string name;
Metadata data{};
/// Children of this FST entry. Only valid for directories.

2
Source/Core/Core/State.cpp
View File

@ -94,7 +94,7 @@ static size_t s_state_writes_in_queue;
static std::condition_variable s_state_write_queue_is_empty;
// Don't forget to increase this after doing changes on the savestate system
constexpr u32 STATE_VERSION = 155; // Last changed in PR 10890
constexpr u32 STATE_VERSION = 156; // Last changed in PR 11184
// Maps savestate versions to Dolphin versions.
// Versions after 42 don't need to be added to this list,