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https://github.com/libretro/ppsspp.git
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d6a113809b
This allows the filesystems to more accurately control timing. But they're not actually doing it yet (same timing as before.)
665 lines
16 KiB
C++
665 lines
16 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <algorithm>
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#include <set>
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#include "Common/ChunkFile.h"
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#include "Common/StringUtils.h"
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#include "Core/FileSystems/MetaFileSystem.h"
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#include "Core/HLE/sceKernelThread.h"
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#include "Core/Reporting.h"
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#include "Core/System.h"
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static bool ApplyPathStringToComponentsVector(std::vector<std::string> &vector, const std::string &pathString)
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{
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size_t len = pathString.length();
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size_t start = 0;
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while (start < len)
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{
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// TODO: This should only be done for ms0:/ etc.
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size_t i = pathString.find_first_of("/\\", start);
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if (i == std::string::npos)
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i = len;
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if (i > start)
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{
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std::string component = pathString.substr(start, i - start);
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if (component != ".")
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{
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if (component == "..")
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{
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if (vector.size() != 0)
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{
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vector.pop_back();
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}
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else
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{
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// The PSP silently ignores attempts to .. to parent of root directory
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WARN_LOG(FILESYS, "RealPath: ignoring .. beyond root - root directory is its own parent: \"%s\"", pathString.c_str());
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}
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}
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else
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{
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vector.push_back(component);
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}
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}
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}
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start = i + 1;
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}
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return true;
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}
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/*
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* Changes relative paths to absolute, removes ".", "..", and trailing "/"
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* "drive:./blah" is absolute (ignore the dot) and "/blah" is relative (because it's missing "drive:")
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* babel (and possibly other games) use "/directoryThatDoesNotExist/../directoryThatExists/filename"
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*/
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static bool RealPath(const std::string ¤tDirectory, const std::string &inPath, std::string &outPath)
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{
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size_t inLen = inPath.length();
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if (inLen == 0)
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{
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WARN_LOG(FILESYS, "RealPath: inPath is empty");
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outPath = currentDirectory;
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return true;
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}
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size_t inColon = inPath.find(':');
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if (inColon + 1 == inLen)
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{
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// There's nothing after the colon, e.g. umd0: - this is perfectly valid.
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outPath = inPath;
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return true;
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}
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bool relative = (inColon == std::string::npos);
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std::string prefix, inAfterColon;
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std::vector<std::string> cmpnts; // path components
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size_t outPathCapacityGuess = inPath.length();
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if (relative)
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{
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size_t curDirLen = currentDirectory.length();
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if (curDirLen == 0)
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{
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory is empty", inPath.c_str());
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return false;
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}
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size_t curDirColon = currentDirectory.find(':');
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if (curDirColon == std::string::npos)
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{
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" has no prefix", inPath.c_str(), currentDirectory.c_str());
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return false;
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}
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if (curDirColon + 1 == curDirLen)
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{
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" is all prefix and no path. Using \"/\" as path for current directory.", inPath.c_str(), currentDirectory.c_str());
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}
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else
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{
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const std::string curDirAfter = currentDirectory.substr(curDirColon + 1);
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if (! ApplyPathStringToComponentsVector(cmpnts, curDirAfter) )
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{
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ERROR_LOG(FILESYS,"RealPath: currentDirectory is not a valid path: \"%s\"", currentDirectory.c_str());
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return false;
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}
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outPathCapacityGuess += curDirLen;
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}
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prefix = currentDirectory.substr(0, curDirColon + 1);
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inAfterColon = inPath;
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}
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else
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{
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prefix = inPath.substr(0, inColon + 1);
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inAfterColon = inPath.substr(inColon + 1);
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// Special case: "disc0:" is different from "disc0:/", so keep track of the single slash.
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if (inAfterColon == "/")
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{
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outPath = prefix + inAfterColon;
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return true;
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}
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}
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if (! ApplyPathStringToComponentsVector(cmpnts, inAfterColon) )
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{
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WARN_LOG(FILESYS, "RealPath: inPath is not a valid path: \"%s\"", inPath.c_str());
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return false;
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}
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outPath.clear();
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outPath.reserve(outPathCapacityGuess);
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outPath.append(prefix);
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size_t numCmpnts = cmpnts.size();
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for (size_t i = 0; i < numCmpnts; i++)
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{
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outPath.append(1, '/');
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outPath.append(cmpnts[i]);
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}
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return true;
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}
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IFileSystem *MetaFileSystem::GetHandleOwner(u32 handle)
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{
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lock_guard guard(lock);
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for (size_t i = 0; i < fileSystems.size(); i++)
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{
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if (fileSystems[i].system->OwnsHandle(handle))
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return fileSystems[i].system; //got it!
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}
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//none found?
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return 0;
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}
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bool MetaFileSystem::MapFilePath(const std::string &_inpath, std::string &outpath, MountPoint **system)
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{
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lock_guard guard(lock);
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std::string realpath;
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std::string inpath = _inpath;
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// "ms0:/file.txt" is equivalent to " ms0:/file.txt". Yes, really.
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if (inpath.find(':') != inpath.npos) {
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size_t offset = 0;
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while (inpath[offset] == ' ') {
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offset++;
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}
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if (offset > 0) {
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inpath = inpath.substr(offset);
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}
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}
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// Special handling: host0:command.txt (as seen in Super Monkey Ball Adventures, for example)
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// appears to mean the current directory on the UMD. Let's just assume the current directory.
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if (strncasecmp(inpath.c_str(), "host0:", strlen("host0:")) == 0) {
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INFO_LOG(FILESYS, "Host0 path detected, stripping: %s", inpath.c_str());
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// However, this causes trouble when running tests, since our test framework uses host0:.
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// Maybe it's really just supposed to map to umd0 or something?
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if (PSP_CoreParameter().headLess) {
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inpath = "umd0:" + inpath.substr(strlen("host0:"));
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} else {
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inpath = inpath.substr(strlen("host0:"));
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}
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}
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const std::string *currentDirectory = &startingDirectory;
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int currentThread = __KernelGetCurThread();
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currentDir_t::iterator it = currentDir.find(currentThread);
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if (it == currentDir.end())
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{
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//Attempt to emulate SCE_KERNEL_ERROR_NOCWD / 8002032C: may break things requiring fixes elsewhere
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if (inpath.find(':') == std::string::npos /* means path is relative */)
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{
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lastOpenError = SCE_KERNEL_ERROR_NOCWD;
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WARN_LOG(FILESYS, "Path is relative, but current directory not set for thread %i. returning 8002032C(SCE_KERNEL_ERROR_NOCWD) instead.", currentThread);
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}
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}
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else
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{
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currentDirectory = &(it->second);
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}
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if ( RealPath(*currentDirectory, inpath, realpath) )
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{
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std::string prefix = realpath;
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size_t prefixPos = realpath.find(':');
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if (prefixPos != realpath.npos)
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prefix = NormalizePrefix(realpath.substr(0, prefixPos + 1));
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for (size_t i = 0; i < fileSystems.size(); i++)
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{
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size_t prefLen = fileSystems[i].prefix.size();
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if (strncasecmp(fileSystems[i].prefix.c_str(), prefix.c_str(), prefLen) == 0)
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{
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outpath = realpath.substr(prefixPos + 1);
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*system = &(fileSystems[i]);
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VERBOSE_LOG(FILESYS, "MapFilePath: mapped \"%s\" to prefix: \"%s\", path: \"%s\"", inpath.c_str(), fileSystems[i].prefix.c_str(), outpath.c_str());
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return true;
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}
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}
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}
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DEBUG_LOG(FILESYS, "MapFilePath: failed mapping \"%s\", returning false", inpath.c_str());
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return false;
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}
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std::string MetaFileSystem::NormalizePrefix(std::string prefix) const {
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// Let's apply some mapping here since it won't break savestates.
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if (prefix == "memstick:")
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prefix = "ms0:";
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// Seems like umd00: etc. work just fine...
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if (startsWith(prefix, "umd"))
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prefix = "umd0:";
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// Seems like umd00: etc. work just fine...
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if (startsWith(prefix, "host"))
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prefix = "host0:";
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// Should we simply make this case insensitive?
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if (prefix == "DISC0:")
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prefix = "disc0:";
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return prefix;
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}
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void MetaFileSystem::Mount(std::string prefix, IFileSystem *system)
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{
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lock_guard guard(lock);
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MountPoint x;
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x.prefix = prefix;
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x.system = system;
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fileSystems.push_back(x);
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}
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void MetaFileSystem::Unmount(std::string prefix, IFileSystem *system)
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{
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lock_guard guard(lock);
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MountPoint x;
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x.prefix = prefix;
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x.system = system;
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fileSystems.erase(std::remove(fileSystems.begin(), fileSystems.end(), x), fileSystems.end());
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}
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void MetaFileSystem::Remount(IFileSystem *oldSystem, IFileSystem *newSystem) {
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for (auto it = fileSystems.begin(); it != fileSystems.end(); ++it) {
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if (it->system == oldSystem) {
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it->system = newSystem;
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}
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}
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}
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IFileSystem *MetaFileSystem::GetSystemFromFilename(const std::string &filename) {
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size_t prefixPos = filename.find(':');
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if (prefixPos == filename.npos)
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return 0;
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return GetSystem(filename.substr(0, prefixPos + 1));
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}
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IFileSystem *MetaFileSystem::GetSystem(const std::string &prefix) {
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for (auto it = fileSystems.begin(); it != fileSystems.end(); ++it) {
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if (it->prefix == NormalizePrefix(prefix))
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return it->system;
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}
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return NULL;
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}
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void MetaFileSystem::Shutdown()
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{
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lock_guard guard(lock);
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current = 6;
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// Ownership is a bit convoluted. Let's just delete everything once.
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std::set<IFileSystem *> toDelete;
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for (size_t i = 0; i < fileSystems.size(); i++) {
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toDelete.insert(fileSystems[i].system);
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}
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for (auto iter = toDelete.begin(); iter != toDelete.end(); ++iter)
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{
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delete *iter;
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}
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fileSystems.clear();
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currentDir.clear();
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startingDirectory = "";
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}
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u32 MetaFileSystem::OpenWithError(int &error, std::string filename, FileAccess access, const char *devicename)
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{
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lock_guard guard(lock);
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u32 h = OpenFile(filename, access, devicename);
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error = lastOpenError;
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return h;
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}
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u32 MetaFileSystem::OpenFile(std::string filename, FileAccess access, const char *devicename)
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{
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lock_guard guard(lock);
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lastOpenError = 0;
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std::string of;
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MountPoint *mount;
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if (MapFilePath(filename, of, &mount))
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{
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s32 res = mount->system->OpenFile(of, access, mount->prefix.c_str());
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if (res < 0)
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{
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lastOpenError = res;
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return 0;
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}
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return res;
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}
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else
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{
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return 0;
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}
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}
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PSPFileInfo MetaFileSystem::GetFileInfo(std::string filename)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(filename, of, &system))
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{
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return system->GetFileInfo(of);
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}
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else
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{
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PSPFileInfo bogus; // TODO
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return bogus;
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}
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}
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bool MetaFileSystem::GetHostPath(const std::string &inpath, std::string &outpath)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(inpath, of, &system)) {
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return system->GetHostPath(of, outpath);
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} else {
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return false;
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}
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}
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std::vector<PSPFileInfo> MetaFileSystem::GetDirListing(std::string path)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(path, of, &system))
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{
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return system->GetDirListing(of);
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}
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else
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{
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std::vector<PSPFileInfo> empty;
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return empty;
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}
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}
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void MetaFileSystem::ThreadEnded(int threadID)
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{
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lock_guard guard(lock);
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currentDir.erase(threadID);
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}
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int MetaFileSystem::ChDir(const std::string &dir)
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{
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lock_guard guard(lock);
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// Retain the old path and fail if the arg is 1023 bytes or longer.
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if (dir.size() >= 1023)
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return SCE_KERNEL_ERROR_NAMETOOLONG;
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int curThread = __KernelGetCurThread();
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std::string of;
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MountPoint *mountPoint;
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if (MapFilePath(dir, of, &mountPoint))
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{
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currentDir[curThread] = mountPoint->prefix + of;
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return 0;
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}
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else
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{
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for (size_t i = 0; i < fileSystems.size(); i++)
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{
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const std::string &prefix = fileSystems[i].prefix;
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if (strncasecmp(prefix.c_str(), dir.c_str(), prefix.size()) == 0)
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{
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// The PSP is completely happy with invalid current dirs as long as they have a valid device.
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WARN_LOG(FILESYS, "ChDir failed to map path \"%s\", saving as current directory anyway", dir.c_str());
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currentDir[curThread] = dir;
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return 0;
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}
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}
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WARN_LOG_REPORT(FILESYS, "ChDir failed to map device for \"%s\", failing", dir.c_str());
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return SCE_KERNEL_ERROR_NODEV;
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}
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}
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bool MetaFileSystem::MkDir(const std::string &dirname)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(dirname, of, &system))
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{
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return system->MkDir(of);
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}
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else
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{
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return false;
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}
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}
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bool MetaFileSystem::RmDir(const std::string &dirname)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(dirname, of, &system))
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{
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return system->RmDir(of);
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}
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else
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{
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return false;
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}
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}
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int MetaFileSystem::RenameFile(const std::string &from, const std::string &to)
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{
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lock_guard guard(lock);
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std::string of;
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std::string rf;
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IFileSystem *osystem;
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IFileSystem *rsystem = NULL;
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if (MapFilePath(from, of, &osystem))
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{
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// If it's a relative path, it seems to always use from's filesystem.
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if (to.find(":/") != to.npos)
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{
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if (!MapFilePath(to, rf, &rsystem))
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return -1;
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}
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else
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{
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rf = to;
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rsystem = osystem;
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}
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if (osystem != rsystem)
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return SCE_KERNEL_ERROR_XDEV;
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return osystem->RenameFile(of, rf);
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}
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else
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{
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return -1;
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}
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}
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bool MetaFileSystem::RemoveFile(const std::string &filename)
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{
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lock_guard guard(lock);
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std::string of;
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IFileSystem *system;
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if (MapFilePath(filename, of, &system))
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{
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return system->RemoveFile(of);
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}
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else
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{
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return false;
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}
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}
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int MetaFileSystem::Ioctl(u32 handle, u32 cmd, u32 indataPtr, u32 inlen, u32 outdataPtr, u32 outlen, int &usec)
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{
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lock_guard guard(lock);
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IFileSystem *sys = GetHandleOwner(handle);
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if (sys)
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return sys->Ioctl(handle, cmd, indataPtr, inlen, outdataPtr, outlen, usec);
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return SCE_KERNEL_ERROR_ERROR;
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}
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int MetaFileSystem::DevType(u32 handle)
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{
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|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->DevType(handle);
|
|
return SCE_KERNEL_ERROR_ERROR;
|
|
}
|
|
|
|
void MetaFileSystem::CloseFile(u32 handle)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
sys->CloseFile(handle);
|
|
}
|
|
|
|
size_t MetaFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->ReadFile(handle, pointer, size);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
size_t MetaFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->WriteFile(handle, pointer, size);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
size_t MetaFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size, int &usec)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->ReadFile(handle, pointer, size, usec);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
size_t MetaFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size, int &usec)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->WriteFile(handle, pointer, size, usec);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
size_t MetaFileSystem::SeekFile(u32 handle, s32 position, FileMove type)
|
|
{
|
|
lock_guard guard(lock);
|
|
IFileSystem *sys = GetHandleOwner(handle);
|
|
if (sys)
|
|
return sys->SeekFile(handle,position,type);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
int MetaFileSystem::ReadEntireFile(const std::string &filename, std::vector<u8> &data) {
|
|
int error = 0;
|
|
u32 handle = OpenWithError(error, filename, FILEACCESS_READ);
|
|
if (handle == 0)
|
|
return error;
|
|
|
|
size_t dataSize = (size_t)GetFileInfo(filename).size;
|
|
data.resize(dataSize);
|
|
|
|
size_t result = ReadFile(handle, (u8 *)&data[0], dataSize);
|
|
CloseFile(handle);
|
|
|
|
if (result != dataSize)
|
|
return SCE_KERNEL_ERROR_ERROR;
|
|
return 0;
|
|
}
|
|
|
|
u64 MetaFileSystem::FreeSpace(const std::string &path)
|
|
{
|
|
lock_guard guard(lock);
|
|
std::string of;
|
|
IFileSystem *system;
|
|
if (MapFilePath(path, of, &system))
|
|
return system->FreeSpace(of);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void MetaFileSystem::DoState(PointerWrap &p)
|
|
{
|
|
lock_guard guard(lock);
|
|
|
|
auto s = p.Section("MetaFileSystem", 1);
|
|
if (!s)
|
|
return;
|
|
|
|
p.Do(current);
|
|
|
|
// Save/load per-thread current directory map
|
|
p.Do(currentDir);
|
|
|
|
u32 n = (u32) fileSystems.size();
|
|
p.Do(n);
|
|
bool skipPfat0 = false;
|
|
if (n != (u32) fileSystems.size())
|
|
{
|
|
if (n == (u32) fileSystems.size() - 1) {
|
|
skipPfat0 = true;
|
|
} else {
|
|
p.SetError(p.ERROR_FAILURE);
|
|
ERROR_LOG(FILESYS, "Savestate failure: number of filesystems doesn't match.");
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (u32 i = 0; i < n; ++i) {
|
|
if (!skipPfat0 || fileSystems[i].prefix != "pfat0:") {
|
|
fileSystems[i].system->DoState(p);
|
|
}
|
|
}
|
|
}
|
|
|