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#include <pch.hpp>
#include <string.h>
#include "fuseApp.h"
#include "lockHelpers.h"
#include "cache.impl.h"
#include <entCache.h>
#include <slicer/slicer.h>
#include <xml/serializer.h>
template class Cache<struct stat, std::string, IceUtil::Shared, IceUtil::Handle<Cacheable<struct stat, std::string, IceUtil::Shared>>>;
template class OptimisticCallCacheable<struct stat, std::string, IceUtil::Shared>;
NetFS::FuseApp::FuseApp(int & argc, char ** argv) :
_argc(argc),
_argv(argv),
openDirID(0),
openFileID(0)
{
}
NetFS::FuseApp::~FuseApp()
{
for (const OpenDirs::value_type & of : openDirs) {
of.second->remote->close();
}
for (const OpenFiles::value_type & of : openFiles) {
of.second->remote->close();
}
if (volume) {
volume->disconnect();
}
if (ic) {
ic->destroy();
}
}
void *
NetFS::FuseApp::init(struct fuse_conn_info *)
{
ic = Ice::initialize(_argc, _argv);
fc = Slicer::Deserialize<Slicer::XmlFileDeserializer, NetFS::Client::Configuration>(configPath);
return NULL;
}
int
NetFS::FuseApp::opt_parse(void *, const char * arg, int, struct fuse_args *)
{
if (strncmp(arg, "--Ice.", 6) == 0) {
return 0;
}
else if (strncmp(arg, "_netdev", 7) == 0) {
return 0;
}
else if (arg[0] == '-') {
return 1;
}
else if (resourceName.empty()) {
const char * colon = strchr(arg, ':');
resourceName = colon + 1;
configPath.assign(arg, colon);
return 0;
}
else if (mountPoint.empty()) {
mountPoint = arg;
return 1;
}
return 1;
}
void
NetFS::FuseApp::connectToService()
{
if (!service) {
Lock(_lock);
auto e = fc->Resources.find(resourceName);
if (e == fc->Resources.end()) {
throw std::runtime_error("No such resource: " + resourceName);
}
auto proxyAddr = e->second->ServiceIdentity;
for (const auto & ep : e->second->Endpoints) {
proxyAddr += ":" + ep;
}
service = NetFS::ServicePrx::checkedCast(ic->stringToProxy(proxyAddr));
if (!service) {
throw std::runtime_error("Invalid service proxy: " + proxyAddr);
}
}
}
void
NetFS::FuseApp::connectToVolume()
{
if (!volume) {
auto e = fc->Resources.find(resourceName);
if (e == fc->Resources.end()) {
throw std::runtime_error("No such export: " + resourceName);
}
volume = service->connect(e->second->ExportName, "bar");
if (!volume) {
throw "Invalid filesystem proxy";
}
}
}
void
NetFS::FuseApp::connectHandles()
{
for (const OpenFiles::value_type & of : openFiles) {
try {
of.second->remote->ice_ping();
}
catch (const Ice::ObjectNotExistException &) {
of.second->remote = volume->open(reqEnv(), of.second->path, of.second->flags);
}
}
for (const OpenDirs::value_type & of : openDirs) {
try {
of.second->remote->ice_ping();
}
catch (const Ice::ObjectNotExistException &) {
of.second->remote = volume->opendir(reqEnv(), of.second->path);
}
}
}
void
NetFS::FuseApp::verifyConnection()
{
Lock(_lock);
if (service) {
try {
service->ice_ping();
}
catch (const Ice::Exception &) {
service = NULL;
}
}
if (volume) {
try {
volume->ice_ping();
}
catch (const Ice::Exception &) {
volume = NULL;
}
}
}
int
NetFS::FuseApp::onError(const std::exception & e) throw()
{
if (dynamic_cast<const Ice::ObjectNotExistException *>(&e)) {
verifyConnection();
connectToService();
connectToVolume();
connectHandles();
return 0;
}
return FuseAppBase::onError(e);
}
NetFS::ReqEnv
NetFS::FuseApp::reqEnv()
{
connectToService();
connectToVolume();
struct fuse_context * c = fuse_get_context();
return { UserEntCache::instance.getName(c->uid), GroupEntCache::instance.getName(c->gid) };
}
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