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[rpcsx-os] fork: implement vm and vfs fork

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stub metadbg device
implement notification device
implement sys_pipe
This commit is contained in:
DH 2023-10-31 21:28:40 +03:00
parent 39092c7f16
commit 525ef02e8a
22 changed files with 379 additions and 76 deletions
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47
rpcsx-os/vfs.cpp
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@ -9,8 +9,6 @@
#include <optional>
#include <string_view>
static std::map<std::string, orbis::Ref<IoDevice>, std::greater<>> sMountsMap;
struct DevFs : IoDevice {
std::map<std::string, orbis::Ref<IoDevice>> devices;
@ -25,7 +23,6 @@ struct DevFs : IoDevice {
return orbis::ErrorCode::NOENT;
}
};
static orbis::Ref<DevFs> sDevFs;
struct ProcFs : IoDevice {
orbis::ErrorCode open(orbis::Ref<orbis::File> *file, const char *path,
@ -37,19 +34,43 @@ struct ProcFs : IoDevice {
}
};
static orbis::shared_mutex gMountMtx;
static std::map<std::string, orbis::Ref<IoDevice>, std::greater<>> gMountsMap;
static orbis::Ref<DevFs> gDevFs;
void rx::vfs::fork() {
std::lock_guard lock(gMountMtx);
// NOTE: do not decrease reference counter, it managed by parent process
auto parentDevFs = gDevFs.release();
for (auto &mount : gMountsMap) {
mount.second->incRef(); // increase reference for new process
}
gDevFs = orbis::knew<DevFs>();
gMountsMap.emplace("/dev/", gDevFs);
gMountsMap.emplace("/proc/", orbis::knew<ProcFs>());
for (auto &fs : parentDevFs->devices) {
gDevFs->devices[fs.first] = fs.second;
}
}
void rx::vfs::initialize() {
sDevFs = orbis::knew<DevFs>();
sMountsMap.emplace("/dev/", sDevFs);
sMountsMap.emplace("/proc/", orbis::knew<ProcFs>());
gDevFs = orbis::knew<DevFs>();
gMountsMap.emplace("/dev/", gDevFs);
gMountsMap.emplace("/proc/", orbis::knew<ProcFs>());
}
void rx::vfs::deinitialize() {
sDevFs = nullptr;
sMountsMap.clear();
gDevFs = nullptr;
gMountsMap.clear();
}
void rx::vfs::addDevice(std::string name, IoDevice *device) {
sDevFs->devices[std::move(name)] = device;
std::lock_guard lock(gMountMtx);
gDevFs->devices[std::move(name)] = device;
}
static std::pair<orbis::Ref<IoDevice>, std::string>
@ -59,7 +80,9 @@ get(const std::filesystem::path &guestPath) {
orbis::Ref<IoDevice> device;
std::string_view prefix;
for (auto &mount : sMountsMap) {
std::lock_guard lock(gMountMtx);
for (auto &mount : gMountsMap) {
if (!path.starts_with(mount.first)) {
continue;
}
@ -79,7 +102,9 @@ orbis::SysResult rx::vfs::mount(const std::filesystem::path &guestPath,
mp += "/";
}
auto [it, inserted] = sMountsMap.emplace(std::move(mp), dev);
std::lock_guard lock(gMountMtx);
auto [it, inserted] = gMountsMap.emplace(std::move(mp), dev);
if (!inserted) {
return orbis::ErrorCode::EXIST;