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HLE/FS: Return the proper error codes on file Read/Write operations. 

These operations are limited by the open flags specified while opening the file.
This commit is contained in:
Subv 2015-12-28 10:03:09 -05:00
parent 09b0564c75
commit 96f0e32f83
7 changed files with 40 additions and 18 deletions
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14
src/core/file_sys/disk_archive.cpp
View File

@ -124,17 +124,23 @@ bool DiskFile::Open() {
return file->IsOpen();
}
size_t DiskFile::Read(const u64 offset, const size_t length, u8* buffer) const {
ResultVal<size_t> DiskFile::Read(const u64 offset, const size_t length, u8* buffer) const {
if (!mode.read_flag && !mode.write_flag)
return ResultCode(ErrorDescription::FS_InvalidOpenFlags, ErrorModule::FS, ErrorSummary::Canceled, ErrorLevel::Status);
file->Seek(offset, SEEK_SET);
return file->ReadBytes(buffer, length);
return MakeResult<size_t>(file->ReadBytes(buffer, length));
}
size_t DiskFile::Write(const u64 offset, const size_t length, const bool flush, const u8* buffer) const {
ResultVal<size_t> DiskFile::Write(const u64 offset, const size_t length, const bool flush, const u8* buffer) const {
if (!mode.write_flag)
return ResultCode(ErrorDescription::FS_InvalidOpenFlags, ErrorModule::FS, ErrorSummary::Canceled, ErrorLevel::Status);
file->Seek(offset, SEEK_SET);
size_t written = file->WriteBytes(buffer, length);
if (flush)
file->Flush();
return written;
return MakeResult<size_t>(written);
}
u64 DiskFile::GetSize() const {

4
src/core/file_sys/disk_archive.h
View File

@ -55,8 +55,8 @@ public:
DiskFile(const DiskArchive& archive, const Path& path, const Mode mode);
bool Open() override;
size_t Read(u64 offset, size_t length, u8* buffer) const override;
size_t Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
u64 GetSize() const override;
bool SetSize(u64 size) const override;
bool Close() const override;

9
src/core/file_sys/file_backend.h
View File

@ -7,6 +7,7 @@
#include <cstddef>
#include "common/common_types.h"
#include "core/hle/result.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// FileSys namespace
@ -29,9 +30,9 @@ public:
* @param offset Offset in bytes to start reading data from
* @param length Length in bytes of data to read from file
* @param buffer Buffer to read data into
* @return Number of bytes read
* @return Number of bytes read, or error code
*/
virtual size_t Read(u64 offset, size_t length, u8* buffer) const = 0;
virtual ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const = 0;
/**
* Write data to the file
@ -39,9 +40,9 @@ public:
* @param length Length in bytes of data to write to file
* @param flush The flush parameters (0 == do not flush)
* @param buffer Buffer to read data from
* @return Number of bytes written
* @return Number of bytes written, or error code
*/
virtual size_t Write(u64 offset, size_t length, bool flush, const u8* buffer) const = 0;
virtual ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const = 0;
/**
* Get the size of the file in bytes

9
src/core/file_sys/ivfc_archive.cpp
View File

@ -68,17 +68,18 @@ u64 IVFCArchive::GetFreeBytes() const {
////////////////////////////////////////////////////////////////////////////////////////////////////
size_t IVFCFile::Read(const u64 offset, const size_t length, u8* buffer) const {
ResultVal<size_t> IVFCFile::Read(const u64 offset, const size_t length, u8* buffer) const {
LOG_TRACE(Service_FS, "called offset=%llu, length=%zu", offset, length);
romfs_file->Seek(data_offset + offset, SEEK_SET);
size_t read_length = (size_t)std::min((u64)length, data_size - offset);
return romfs_file->ReadBytes(buffer, read_length);
return MakeResult<size_t>(romfs_file->ReadBytes(buffer, read_length));
}
size_t IVFCFile::Write(const u64 offset, const size_t length, const bool flush, const u8* buffer) const {
ResultVal<size_t> IVFCFile::Write(const u64 offset, const size_t length, const bool flush, const u8* buffer) const {
LOG_ERROR(Service_FS, "Attempted to write to IVFC file");
return 0;
// TODO(Subv): Find error code
return MakeResult<size_t>(0);
}
u64 IVFCFile::GetSize() const {

4
src/core/file_sys/ivfc_archive.h
View File

@ -56,8 +56,8 @@ public:
: romfs_file(file), data_offset(offset), data_size(size) {}
bool Open() override { return true; }
size_t Read(u64 offset, size_t length, u8* buffer) const override;
size_t Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
u64 GetSize() const override;
bool SetSize(u64 size) const override;
bool Close() const override { return false; }

1
src/core/hle/result.h
View File

@ -21,6 +21,7 @@ enum class ErrorDescription : u32 {
WrongAddress = 53,
FS_NotFound = 120,
FS_AlreadyExists = 190,
FS_InvalidOpenFlags = 230,
FS_NotAFile = 250,
FS_NotFormatted = 340, ///< This is used by the FS service when creating a SaveData archive
InvalidSection = 1000,

17
src/core/hle/service/fs/archive.cpp
View File

@ -103,7 +103,14 @@ ResultVal<bool> File::SyncRequest() {
u32 address = cmd_buff[5];
LOG_TRACE(Service_FS, "Read %s %s: offset=0x%llx length=%d address=0x%x",
GetTypeName().c_str(), GetName().c_str(), offset, length, address);
cmd_buff[2] = static_cast<u32>(backend->Read(offset, length, Memory::GetPointer(address)));
if (offset + length > backend->GetSize())
LOG_ERROR(Service_FS, "Reading from out of bounds offset=0x%llX length=0x%08X file_size=0x%llX", offset, length, backend->GetSize());
ResultVal<size_t> read = backend->Read(offset, length, Memory::GetPointer(address));
if (read.Failed()) {
cmd_buff[1] = read.Code().raw;
return read.Code();
}
cmd_buff[2] = static_cast<u32>(read.MoveFrom());
break;
}
@ -116,7 +123,13 @@ ResultVal<bool> File::SyncRequest() {
u32 address = cmd_buff[6];
LOG_TRACE(Service_FS, "Write %s %s: offset=0x%llx length=%d address=0x%x, flush=0x%x",
GetTypeName().c_str(), GetName().c_str(), offset, length, address, flush);
cmd_buff[2] = static_cast<u32>(backend->Write(offset, length, flush != 0, Memory::GetPointer(address)));
ResultVal<size_t> written = backend->Write(offset, length, flush != 0, Memory::GetPointer(address));
if (written.Failed()) {
cmd_buff[1] = written.Code().raw;
return written.Code();
}
cmd_buff[2] = static_cast<u32>(written.MoveFrom());
break;
}