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fs/archive: move file and directory classes to their own files

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This commit is contained in:
Weiyi Wang 2018-09-28 10:45:35 -04:00
parent b163502744
commit 7678327bf2
7 changed files with 431 additions and 398 deletions
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4
src/core/CMakeLists.txt
View file

@ -247,6 +247,10 @@ add_library(core STATIC
hle/service/frd/frd_u.h hle/service/frd/frd_u.h
hle/service/fs/archive.cpp hle/service/fs/archive.cpp
hle/service/fs/archive.h hle/service/fs/archive.h
hle/service/fs/directory.cpp
hle/service/fs/directory.h
hle/service/fs/file.cpp
hle/service/fs/file.h
hle/service/fs/fs_user.cpp hle/service/fs/fs_user.cpp
hle/service/fs/fs_user.h hle/service/fs/fs_user.h
hle/service/gsp/gsp.cpp hle/service/gsp/gsp.cpp

328
src/core/hle/service/fs/archive.cpp
View file

@ -27,339 +27,11 @@
#include "core/file_sys/directory_backend.h" #include "core/file_sys/directory_backend.h"
#include "core/file_sys/errors.h" #include "core/file_sys/errors.h"
#include "core/file_sys/file_backend.h" #include "core/file_sys/file_backend.h"
#include "core/hle/ipc.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/client_session.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/result.h" #include "core/hle/result.h"
#include "core/hle/service/fs/archive.h" #include "core/hle/service/fs/archive.h"
#include "core/hle/service/fs/fs_user.h"
#include "core/hle/service/service.h"
#include "core/memory.h"
namespace Service::FS { namespace Service::FS {
// Command to access directory
enum class DirectoryCommand : u32 {
Dummy1 = 0x000100C6,
Control = 0x040100C4,
Read = 0x08010042,
Close = 0x08020000,
};
File::File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path)
: ServiceFramework("", 1), path(path), backend(std::move(backend)) {
static const FunctionInfo functions[] = {
{0x08010100, &File::OpenSubFile, "OpenSubFile"},
{0x080200C2, &File::Read, "Read"},
{0x08030102, &File::Write, "Write"},
{0x08040000, &File::GetSize, "GetSize"},
{0x08050080, &File::SetSize, "SetSize"},
{0x08080000, &File::Close, "Close"},
{0x08090000, &File::Flush, "Flush"},
{0x080A0040, &File::SetPriority, "SetPriority"},
{0x080B0000, &File::GetPriority, "GetPriority"},
{0x080C0000, &File::OpenLinkFile, "OpenLinkFile"},
};
RegisterHandlers(functions);
}
void File::Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0802, 3, 2);
u64 offset = rp.Pop<u64>();
u32 length = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
LOG_TRACE(Service_FS, "Read {}: offset=0x{:x} length=0x{:08X}", GetName(), offset, length);
const FileSessionSlot* file = GetSessionData(ctx.Session());
if (file->subfile && length > file->size) {
LOG_WARNING(Service_FS, "Trying to read beyond the subfile size, truncating");
length = static_cast<u32>(file->size);
}
// This file session might have a specific offset from where to start reading, apply it.
offset += file->offset;
if (offset + length > backend->GetSize()) {
LOG_ERROR(Service_FS,
"Reading from out of bounds offset=0x{:x} length=0x{:08X} file_size=0x{:x}",
offset, length, backend->GetSize());
}
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
std::vector<u8> data(length);
ResultVal<std::size_t> read = backend->Read(offset, data.size(), data.data());
if (read.Failed()) {
rb.Push(read.Code());
rb.Push<u32>(0);
} else {
buffer.Write(data.data(), 0, *read);
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(static_cast<u32>(*read));
}
rb.PushMappedBuffer(buffer);
std::chrono::nanoseconds read_timeout_ns{backend->GetReadDelayNs(length)};
ctx.SleepClientThread(Kernel::GetCurrentThread(), "file::read", read_timeout_ns,
[](Kernel::SharedPtr<Kernel::Thread> thread,
Kernel::HLERequestContext& ctx, Kernel::ThreadWakeupReason reason) {
// Nothing to do here
});
}
void File::Write(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0803, 4, 2);
u64 offset = rp.Pop<u64>();
u32 length = rp.Pop<u32>();
u32 flush = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
LOG_TRACE(Service_FS, "Write {}: offset=0x{:x} length={}, flush=0x{:x}", GetName(), offset,
length, flush);
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
const FileSessionSlot* file = GetSessionData(ctx.Session());
// Subfiles can not be written to
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
rb.Push<u32>(0);
rb.PushMappedBuffer(buffer);
return;
}
std::vector<u8> data(length);
buffer.Read(data.data(), 0, data.size());
ResultVal<std::size_t> written = backend->Write(offset, data.size(), flush != 0, data.data());
if (written.Failed()) {
rb.Push(written.Code());
rb.Push<u32>(0);
} else {
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(static_cast<u32>(*written));
}
rb.PushMappedBuffer(buffer);
}
void File::GetSize(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0804, 0, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(3, 0);
rb.Push(RESULT_SUCCESS);
rb.Push<u64>(file->size);
}
void File::SetSize(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0805, 2, 0);
u64 size = rp.Pop<u64>();
FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
// SetSize can not be called on subfiles.
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
file->size = size;
backend->SetSize(size);
rb.Push(RESULT_SUCCESS);
}
void File::Close(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0808, 0, 0);
// TODO(Subv): Only close the backend if this client is the only one left.
if (connected_sessions.size() > 1)
LOG_WARNING(Service_FS, "Closing File backend but {} clients still connected",
connected_sessions.size());
backend->Close();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
void File::Flush(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0809, 0, 0);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
// Subfiles can not be flushed.
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
backend->Flush();
rb.Push(RESULT_SUCCESS);
}
void File::SetPriority(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x080A, 1, 0);
FileSessionSlot* file = GetSessionData(ctx.Session());
file->priority = rp.Pop<u32>();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
void File::GetPriority(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x080B, 0, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(2, 0);
rb.Push(RESULT_SUCCESS);
rb.Push(file->priority);
}
void File::OpenLinkFile(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_FS, "(STUBBED) File command OpenLinkFile {}", GetName());
using Kernel::ClientSession;
using Kernel::ServerSession;
using Kernel::SharedPtr;
IPC::RequestParser rp(ctx, 0x080C, 0, 0);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
auto sessions = ServerSession::CreateSessionPair(GetName());
auto server = std::get<SharedPtr<ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
const FileSessionSlot* original_file = GetSessionData(ctx.Session());
slot->priority = original_file->priority;
slot->offset = 0;
slot->size = backend->GetSize();
slot->subfile = false;
rb.Push(RESULT_SUCCESS);
rb.PushMoveObjects(std::get<SharedPtr<ClientSession>>(sessions));
}
void File::OpenSubFile(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0801, 4, 0);
s64 offset = rp.PopRaw<s64>();
s64 size = rp.PopRaw<s64>();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
const FileSessionSlot* original_file = GetSessionData(ctx.Session());
if (original_file->subfile) {
// OpenSubFile can not be called on a file which is already as subfile
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
if (offset < 0 || size < 0) {
rb.Push(FileSys::ERR_WRITE_BEYOND_END);
return;
}
std::size_t end = offset + size;
// TODO(Subv): Check for overflow and return ERR_WRITE_BEYOND_END
if (end > original_file->size) {
rb.Push(FileSys::ERR_WRITE_BEYOND_END);
return;
}
using Kernel::ClientSession;
using Kernel::ServerSession;
using Kernel::SharedPtr;
auto sessions = ServerSession::CreateSessionPair(GetName());
auto server = std::get<SharedPtr<ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
slot->priority = original_file->priority;
slot->offset = offset;
slot->size = size;
slot->subfile = true;
rb.Push(RESULT_SUCCESS);
rb.PushMoveObjects(std::get<SharedPtr<ClientSession>>(sessions));
}
Kernel::SharedPtr<Kernel::ClientSession> File::Connect() {
auto sessions = Kernel::ServerSession::CreateSessionPair(GetName());
auto server = std::get<Kernel::SharedPtr<Kernel::ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
slot->priority = 0;
slot->offset = 0;
slot->size = backend->GetSize();
slot->subfile = false;
return std::get<Kernel::SharedPtr<Kernel::ClientSession>>(sessions);
}
std::size_t File::GetSessionFileOffset(Kernel::SharedPtr<Kernel::ServerSession> session) {
const FileSessionSlot* slot = GetSessionData(session);
ASSERT(slot);
return slot->offset;
}
std::size_t File::GetSessionFileSize(Kernel::SharedPtr<Kernel::ServerSession> session) {
const FileSessionSlot* slot = GetSessionData(session);
ASSERT(slot);
return slot->size;
}
Directory::Directory(std::unique_ptr<FileSys::DirectoryBackend>&& backend,
const FileSys::Path& path)
: ServiceFramework("", 1), path(path), backend(std::move(backend)) {
static const FunctionInfo functions[] = {
// clang-format off
{0x08010042, &Directory::Read, "Read"},
{0x08020000, &Directory::Close, "Close"},
// clang-format on
};
RegisterHandlers(functions);
}
Directory::~Directory() {}
void Directory::Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0801, 1, 2);
u32 count = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
std::vector<FileSys::Entry> entries(count);
LOG_TRACE(Service_FS, "Read {}: count={}", GetName(), count);
// Number of entries actually read
u32 read = backend->Read(static_cast<u32>(entries.size()), entries.data());
buffer.Write(entries.data(), 0, read * sizeof(FileSys::Entry));
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
rb.Push(RESULT_SUCCESS);
rb.Push(read);
rb.PushMappedBuffer(buffer);
}
void Directory::Close(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0802, 0, 0);
LOG_TRACE(Service_FS, "Close {}", GetName());
backend->Close();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
using FileSys::ArchiveBackend; using FileSys::ArchiveBackend;
using FileSys::ArchiveFactory; using FileSys::ArchiveFactory;

72
src/core/hle/service/fs/archive.h
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@ -9,15 +9,9 @@
#include <vector> #include <vector>
#include "common/common_types.h" #include "common/common_types.h"
#include "core/file_sys/archive_backend.h" #include "core/file_sys/archive_backend.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/result.h" #include "core/hle/result.h"
#include "core/hle/service/service.h" #include "core/hle/service/fs/directory.h"
#include "core/hle/service/fs/file.h"
namespace FileSys {
class DirectoryBackend;
class FileBackend;
} // namespace FileSys
/// The unique system identifier hash, also known as ID0 /// The unique system identifier hash, also known as ID0
static constexpr char SYSTEM_ID[]{"00000000000000000000000000000000"}; static constexpr char SYSTEM_ID[]{"00000000000000000000000000000000"};
@ -49,68 +43,6 @@ enum class MediaType : u32 { NAND = 0, SDMC = 1, GameCard = 2 };
typedef u64 ArchiveHandle; typedef u64 ArchiveHandle;
struct FileSessionSlot : public Kernel::SessionRequestHandler::SessionDataBase {
u32 priority; ///< Priority of the file. TODO(Subv): Find out what this means
u64 offset; ///< Offset that this session will start reading from.
u64 size; ///< Max size of the file that this session is allowed to access
bool subfile; ///< Whether this file was opened via OpenSubFile or not.
};
// TODO: File is not a real service, but it can still utilize ServiceFramework::RegisterHandlers.
// Consider splitting ServiceFramework interface.
class File final : public ServiceFramework<File, FileSessionSlot> {
public:
File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path);
~File() = default;
std::string GetName() const {
return "Path: " + path.DebugStr();
}
FileSys::Path path; ///< Path of the file
std::unique_ptr<FileSys::FileBackend> backend; ///< File backend interface
/// Creates a new session to this File and returns the ClientSession part of the connection.
Kernel::SharedPtr<Kernel::ClientSession> Connect();
// Returns the start offset of an open file represented by the input session, opened with
// OpenSubFile.
std::size_t GetSessionFileOffset(Kernel::SharedPtr<Kernel::ServerSession> session);
// Returns the size of an open file represented by the input session, opened with
// OpenSubFile.
std::size_t GetSessionFileSize(Kernel::SharedPtr<Kernel::ServerSession> session);
private:
void Read(Kernel::HLERequestContext& ctx);
void Write(Kernel::HLERequestContext& ctx);
void GetSize(Kernel::HLERequestContext& ctx);
void SetSize(Kernel::HLERequestContext& ctx);
void Close(Kernel::HLERequestContext& ctx);
void Flush(Kernel::HLERequestContext& ctx);
void SetPriority(Kernel::HLERequestContext& ctx);
void GetPriority(Kernel::HLERequestContext& ctx);
void OpenLinkFile(Kernel::HLERequestContext& ctx);
void OpenSubFile(Kernel::HLERequestContext& ctx);
};
class Directory final : public ServiceFramework<Directory> {
public:
Directory(std::unique_ptr<FileSys::DirectoryBackend>&& backend, const FileSys::Path& path);
~Directory();
std::string GetName() const {
return "Directory: " + path.DebugStr();
}
FileSys::Path path; ///< Path of the directory
std::unique_ptr<FileSys::DirectoryBackend> backend; ///< File backend interface
protected:
void Read(Kernel::HLERequestContext& ctx);
void Close(Kernel::HLERequestContext& ctx);
};
/** /**
* Opens an archive * Opens an archive
* @param id_code IdCode of the archive to open * @param id_code IdCode of the archive to open

51
src/core/hle/service/fs/directory.cpp Normal file
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@ -0,0 +1,51 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/logging/log.h"
#include "core/file_sys/directory_backend.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/service/fs/directory.h"
namespace Service::FS {
Directory::Directory(std::unique_ptr<FileSys::DirectoryBackend>&& backend,
const FileSys::Path& path)
: ServiceFramework("", 1), path(path), backend(std::move(backend)) {
static const FunctionInfo functions[] = {
// clang-format off
{0x08010042, &Directory::Read, "Read"},
{0x08020000, &Directory::Close, "Close"},
// clang-format on
};
RegisterHandlers(functions);
}
Directory::~Directory() {}
void Directory::Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0801, 1, 2);
u32 count = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
std::vector<FileSys::Entry> entries(count);
LOG_TRACE(Service_FS, "Read {}: count={}", GetName(), count);
// Number of entries actually read
u32 read = backend->Read(static_cast<u32>(entries.size()), entries.data());
buffer.Write(entries.data(), 0, read * sizeof(FileSys::Entry));
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
rb.Push(RESULT_SUCCESS);
rb.Push(read);
rb.PushMappedBuffer(buffer);
}
void Directory::Close(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0802, 0, 0);
LOG_TRACE(Service_FS, "Close {}", GetName());
backend->Close();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
} // namespace Service::FS

30
src/core/hle/service/fs/directory.h Normal file
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@ -0,0 +1,30 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "core/file_sys/archive_backend.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/service/service.h"
namespace Service::FS {
class Directory final : public ServiceFramework<Directory> {
public:
Directory(std::unique_ptr<FileSys::DirectoryBackend>&& backend, const FileSys::Path& path);
~Directory();
std::string GetName() const {
return "Directory: " + path.DebugStr();
}
FileSys::Path path; ///< Path of the directory
std::unique_ptr<FileSys::DirectoryBackend> backend; ///< File backend interface
protected:
void Read(Kernel::HLERequestContext& ctx);
void Close(Kernel::HLERequestContext& ctx);
};
} // namespace Service::FS

286
src/core/hle/service/fs/file.cpp Normal file
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@ -0,0 +1,286 @@
// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/logging/log.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/file_backend.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/client_session.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/service/fs/file.h"
namespace Service::FS {
File::File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path)
: ServiceFramework("", 1), path(path), backend(std::move(backend)) {
static const FunctionInfo functions[] = {
{0x08010100, &File::OpenSubFile, "OpenSubFile"},
{0x080200C2, &File::Read, "Read"},
{0x08030102, &File::Write, "Write"},
{0x08040000, &File::GetSize, "GetSize"},
{0x08050080, &File::SetSize, "SetSize"},
{0x08080000, &File::Close, "Close"},
{0x08090000, &File::Flush, "Flush"},
{0x080A0040, &File::SetPriority, "SetPriority"},
{0x080B0000, &File::GetPriority, "GetPriority"},
{0x080C0000, &File::OpenLinkFile, "OpenLinkFile"},
};
RegisterHandlers(functions);
}
void File::Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0802, 3, 2);
u64 offset = rp.Pop<u64>();
u32 length = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
LOG_TRACE(Service_FS, "Read {}: offset=0x{:x} length=0x{:08X}", GetName(), offset, length);
const FileSessionSlot* file = GetSessionData(ctx.Session());
if (file->subfile && length > file->size) {
LOG_WARNING(Service_FS, "Trying to read beyond the subfile size, truncating");
length = static_cast<u32>(file->size);
}
// This file session might have a specific offset from where to start reading, apply it.
offset += file->offset;
if (offset + length > backend->GetSize()) {
LOG_ERROR(Service_FS,
"Reading from out of bounds offset=0x{:x} length=0x{:08X} file_size=0x{:x}",
offset, length, backend->GetSize());
}
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
std::vector<u8> data(length);
ResultVal<std::size_t> read = backend->Read(offset, data.size(), data.data());
if (read.Failed()) {
rb.Push(read.Code());
rb.Push<u32>(0);
} else {
buffer.Write(data.data(), 0, *read);
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(static_cast<u32>(*read));
}
rb.PushMappedBuffer(buffer);
std::chrono::nanoseconds read_timeout_ns{backend->GetReadDelayNs(length)};
ctx.SleepClientThread(Kernel::GetCurrentThread(), "file::read", read_timeout_ns,
[](Kernel::SharedPtr<Kernel::Thread> thread,
Kernel::HLERequestContext& ctx, Kernel::ThreadWakeupReason reason) {
// Nothing to do here
});
}
void File::Write(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0803, 4, 2);
u64 offset = rp.Pop<u64>();
u32 length = rp.Pop<u32>();
u32 flush = rp.Pop<u32>();
auto& buffer = rp.PopMappedBuffer();
LOG_TRACE(Service_FS, "Write {}: offset=0x{:x} length={}, flush=0x{:x}", GetName(), offset,
length, flush);
IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
const FileSessionSlot* file = GetSessionData(ctx.Session());
// Subfiles can not be written to
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
rb.Push<u32>(0);
rb.PushMappedBuffer(buffer);
return;
}
std::vector<u8> data(length);
buffer.Read(data.data(), 0, data.size());
ResultVal<std::size_t> written = backend->Write(offset, data.size(), flush != 0, data.data());
if (written.Failed()) {
rb.Push(written.Code());
rb.Push<u32>(0);
} else {
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(static_cast<u32>(*written));
}
rb.PushMappedBuffer(buffer);
}
void File::GetSize(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0804, 0, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(3, 0);
rb.Push(RESULT_SUCCESS);
rb.Push<u64>(file->size);
}
void File::SetSize(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0805, 2, 0);
u64 size = rp.Pop<u64>();
FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
// SetSize can not be called on subfiles.
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
file->size = size;
backend->SetSize(size);
rb.Push(RESULT_SUCCESS);
}
void File::Close(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0808, 0, 0);
// TODO(Subv): Only close the backend if this client is the only one left.
if (connected_sessions.size() > 1)
LOG_WARNING(Service_FS, "Closing File backend but {} clients still connected",
connected_sessions.size());
backend->Close();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
void File::Flush(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0809, 0, 0);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
// Subfiles can not be flushed.
if (file->subfile) {
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
backend->Flush();
rb.Push(RESULT_SUCCESS);
}
void File::SetPriority(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x080A, 1, 0);
FileSessionSlot* file = GetSessionData(ctx.Session());
file->priority = rp.Pop<u32>();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
void File::GetPriority(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x080B, 0, 0);
const FileSessionSlot* file = GetSessionData(ctx.Session());
IPC::RequestBuilder rb = rp.MakeBuilder(2, 0);
rb.Push(RESULT_SUCCESS);
rb.Push(file->priority);
}
void File::OpenLinkFile(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_FS, "(STUBBED) File command OpenLinkFile {}", GetName());
using Kernel::ClientSession;
using Kernel::ServerSession;
using Kernel::SharedPtr;
IPC::RequestParser rp(ctx, 0x080C, 0, 0);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
auto sessions = ServerSession::CreateSessionPair(GetName());
auto server = std::get<SharedPtr<ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
const FileSessionSlot* original_file = GetSessionData(ctx.Session());
slot->priority = original_file->priority;
slot->offset = 0;
slot->size = backend->GetSize();
slot->subfile = false;
rb.Push(RESULT_SUCCESS);
rb.PushMoveObjects(std::get<SharedPtr<ClientSession>>(sessions));
}
void File::OpenSubFile(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x0801, 4, 0);
s64 offset = rp.PopRaw<s64>();
s64 size = rp.PopRaw<s64>();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
const FileSessionSlot* original_file = GetSessionData(ctx.Session());
if (original_file->subfile) {
// OpenSubFile can not be called on a file which is already as subfile
rb.Push(FileSys::ERROR_UNSUPPORTED_OPEN_FLAGS);
return;
}
if (offset < 0 || size < 0) {
rb.Push(FileSys::ERR_WRITE_BEYOND_END);
return;
}
std::size_t end = offset + size;
// TODO(Subv): Check for overflow and return ERR_WRITE_BEYOND_END
if (end > original_file->size) {
rb.Push(FileSys::ERR_WRITE_BEYOND_END);
return;
}
using Kernel::ClientSession;
using Kernel::ServerSession;
using Kernel::SharedPtr;
auto sessions = ServerSession::CreateSessionPair(GetName());
auto server = std::get<SharedPtr<ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
slot->priority = original_file->priority;
slot->offset = offset;
slot->size = size;
slot->subfile = true;
rb.Push(RESULT_SUCCESS);
rb.PushMoveObjects(std::get<SharedPtr<ClientSession>>(sessions));
}
Kernel::SharedPtr<Kernel::ClientSession> File::Connect() {
auto sessions = Kernel::ServerSession::CreateSessionPair(GetName());
auto server = std::get<Kernel::SharedPtr<Kernel::ServerSession>>(sessions);
ClientConnected(server);
FileSessionSlot* slot = GetSessionData(server);
slot->priority = 0;
slot->offset = 0;
slot->size = backend->GetSize();
slot->subfile = false;
return std::get<Kernel::SharedPtr<Kernel::ClientSession>>(sessions);
}
std::size_t File::GetSessionFileOffset(Kernel::SharedPtr<Kernel::ServerSession> session) {
const FileSessionSlot* slot = GetSessionData(session);
ASSERT(slot);
return slot->offset;
}
std::size_t File::GetSessionFileSize(Kernel::SharedPtr<Kernel::ServerSession> session) {
const FileSessionSlot* slot = GetSessionData(session);
ASSERT(slot);
return slot->size;
}
} // namespace Service::FS

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// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "core/file_sys/archive_backend.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/service/service.h"
namespace Service::FS {
struct FileSessionSlot : public Kernel::SessionRequestHandler::SessionDataBase {
u32 priority; ///< Priority of the file. TODO(Subv): Find out what this means
u64 offset; ///< Offset that this session will start reading from.
u64 size; ///< Max size of the file that this session is allowed to access
bool subfile; ///< Whether this file was opened via OpenSubFile or not.
};
// TODO: File is not a real service, but it can still utilize ServiceFramework::RegisterHandlers.
// Consider splitting ServiceFramework interface.
class File final : public ServiceFramework<File, FileSessionSlot> {
public:
File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path);
~File() = default;
std::string GetName() const {
return "Path: " + path.DebugStr();
}
FileSys::Path path; ///< Path of the file
std::unique_ptr<FileSys::FileBackend> backend; ///< File backend interface
/// Creates a new session to this File and returns the ClientSession part of the connection.
Kernel::SharedPtr<Kernel::ClientSession> Connect();
// Returns the start offset of an open file represented by the input session, opened with
// OpenSubFile.
std::size_t GetSessionFileOffset(Kernel::SharedPtr<Kernel::ServerSession> session);
// Returns the size of an open file represented by the input session, opened with
// OpenSubFile.
std::size_t GetSessionFileSize(Kernel::SharedPtr<Kernel::ServerSession> session);
private:
void Read(Kernel::HLERequestContext& ctx);
void Write(Kernel::HLERequestContext& ctx);
void GetSize(Kernel::HLERequestContext& ctx);
void SetSize(Kernel::HLERequestContext& ctx);
void Close(Kernel::HLERequestContext& ctx);
void Flush(Kernel::HLERequestContext& ctx);
void SetPriority(Kernel::HLERequestContext& ctx);
void GetPriority(Kernel::HLERequestContext& ctx);
void OpenLinkFile(Kernel::HLERequestContext& ctx);
void OpenSubFile(Kernel::HLERequestContext& ctx);
};
} // namespace Service::FS