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#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "fuseapp.h"
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "comms.h"
#include "msgtypes.h"
static FuseAppBase * fuseApp;
template <class A, int (FuseAppBase::*f)(A)>
static int fuseCall(A a)
{
try {
return (fuseApp->*f)(a);
}
catch (...) {
return -ENOSYS;
}
}
template <class A, class B, int (FuseAppBase::*f)(A, B)>
static int fuseCall(A a, B b)
{
try {
return (fuseApp->*f)(a, b);
}
catch (...) {
return -ENOSYS;
}
}
template <class A, class B, class C, int (FuseAppBase::*f)(A, B, C)>
static int fuseCall(A a, B b, C c)
{
try {
return (fuseApp->*f)(a, b, c);
}
catch (...) {
return -ENOSYS;
}
}
template <class A, class B, class C, class D, int (FuseAppBase::*f)(A, B, C, D)>
static int fuseCall(A a, B b, C c, D d)
{
try {
return (fuseApp->*f)(a, b, c, d);
}
catch (...) {
return -ENOSYS;
}
}
template <class A, class B, class C, class D, class E, int (FuseAppBase::*f)(A, B, C, D, E)>
static int fuseCall(A a, B b, C c, D d, E e)
{
try {
return (fuseApp->*f)(a, b, c, d, e);
}
catch (...) {
return -ENOSYS;
}
}
static void * fuseInit (struct fuse_conn_info *conn)
{
return fuseApp->init(conn);
}
template <class App>
static void fuseDestroy(void * x)
{
delete (App*)x;
}
class NetFS : public FuseAppBase
{
int access(const char * p, int a)
{
TypedPayloadReq<AccessRequest>::Ptr msg = new TypedPayloadReq<AccessRequest>(fuse_get_context());
msg->data.access = a;
msg->data.path = p;
return -msg->exchange(this)->data.value;
}
int getattr(const char * p, struct stat * s)
{
TypedPayloadReq<GetAttrRequest>::Ptr msg = new TypedPayloadReq<GetAttrRequest>(fuse_get_context());
msg->data.path = p;
TypedPayload<GetAttrReply>::Ptr rep = msg->exchange(this);
*s = rep->data.val;
return -rep->data.res;
}
int opendir(const char * p, struct fuse_file_info * fi)
{
TypedPayloadReq<OpenDirRequest>::Ptr msg = new TypedPayloadReq<OpenDirRequest>(fuse_get_context());
msg->data.path = p;
TypedPayload<OpenDirReply>::Ptr rep = msg->exchange(this);
fi->fh = rep->data.handle;
return -rep->data.error;
}
int releasedir(const char *, struct fuse_file_info * fi)
{
TypedPayloadReq<CloseDirRequest>::Ptr msg = new TypedPayloadReq<CloseDirRequest>(fuse_get_context());
msg->data.handle = fi->fh;
TypedPayload<CloseDirReply>::Ptr rep = msg->exchange(this);
return -rep->data.error;
}
int readdir(const char *, void * buf, fuse_fill_dir_t filler, off_t, struct fuse_file_info * fi)
{
TypedPayloadReq<ReadDirRequest>::Ptr msg = new TypedPayloadReq<ReadDirRequest>(fuse_get_context());
msg->data.handle = fi->fh;
TypedPayload<ReadDirReply>::Ptr rep = msg->exchange(this);
size_t cnt = rep->data.count;
while (cnt--) {
TypedPayload<ReadDirContent>::Ptr dir = recvType<ReadDirContent>();
filler(buf, dir->data.path.c_str(), &dir->data.val, 0);
}
return -rep->data.error;
}
int open(const char * p, struct fuse_file_info * fi)
{
TypedPayloadReq<OpenRequest>::Ptr msg = new TypedPayloadReq<OpenRequest>(fuse_get_context());
msg->data.path = p;
TypedPayload<OpenReply>::Ptr rep = msg->exchange(this);
fi->fh = rep->data.handle;
return -rep->data.error;
}
int release(const char *, struct fuse_file_info * fi)
{
TypedPayloadReq<CloseRequest>::Ptr msg = new TypedPayloadReq<CloseRequest>(fuse_get_context());
msg->data.handle = fi->fh;
TypedPayload<CloseReply>::Ptr rep = msg->exchange(this);
return -rep->data.error;
}
int read(const char *, char * buf, size_t s, off_t o, struct fuse_file_info * fi)
{
TypedPayloadReq<ReadRequest>::Ptr msg = new TypedPayloadReq<ReadRequest>(fuse_get_context());
msg->data.handle = fi->fh;
msg->data.offset = o;
msg->data.size = s;
TypedPayload<ReadReply>::Ptr rep = msg->exchange(this);
if (rep->data.size) {
memcpy(buf, rep->data.data, std::min(s, rep->data.size));
return rep->data.size;
}
else {
return -rep->data.error;
}
}
int write(const char *, const char * buf, size_t s, off_t o, struct fuse_file_info * fi)
{
TypedPayloadReq<WriteRequest>::Ptr msg = new TypedPayloadReq<WriteRequest>(fuse_get_context());
msg->data.handle = fi->fh;
msg->data.offset = o;
msg->data.size = s;
msg->data.data = new char[s]();
memcpy(msg->data.data, buf, s);
TypedPayload<WriteReply>::Ptr rep = msg->exchange(this);
return -rep->data.error;
}
public:
NetFS() :
f(NULL)
{
struct addrinfo hints;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
struct addrinfo *result, *rp;
int s = getaddrinfo("localhost", "4000", &hints, &result);
if (s) {
// Error
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
int sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
if (sfd == -1)
// Error
continue;
if (connect(sfd, rp->ai_addr, rp->ai_addrlen)) {
// Error
continue;
}
f = fdopen(sfd, "a+");
break;
}
}
~NetFS()
{
if (f) {
fclose(f);
}
}
DataPayloadPtr exchange(DataPayloadPtr dp)
{
send(dp);
return recv();
}
void send(DataPayloadPtr dp)
{
PacketPtr sendme = new Packet(0, dp);
sendme->write(f);
}
DataPayloadPtr recv()
{
PacketPtr recvd = new Packet(f);
return recvd->data;
}
template <typename Type>
SmartPointer<TypedPayload<Type> > recvType()
{
DataPayloadPtr p = this->recv();
return p.as<TypedPayload<Type> >();
}
private:
FILE * f;
};
template <typename Type>
SmartPointer<TypedPayload<typename Type::Reply> > TypedPayloadReq<Type>::exchange(NetFS * net)
{
DataPayloadPtr p = net->exchange(this);
return p.as<TypedPayload<typename Type::Reply> >();
}
template <class FuseApp>
int runFuseApp(int argc, char* argv[])
{
struct fuse_opt fuse_opts[] = {
{ NULL, 0, 0 }
};
fuseApp = new FuseApp();
struct fuse_operations operations = {
fuseCall<const char *, struct stat *, &FuseAppBase::getattr>,
fuseCall<const char *, char *, size_t, &FuseAppBase::readlink>,
NULL, // getdir deprecated
fuseCall<const char *, mode_t, dev_t, &FuseAppBase::mknod>,
fuseCall<const char *, mode_t, &FuseAppBase::mkdir>,
fuseCall<const char *, &FuseAppBase::unlink>,
fuseCall<const char *, &FuseAppBase::rmdir>,
fuseCall<const char *, const char *, &FuseAppBase::symlink>,
fuseCall<const char *, const char *, &FuseAppBase::rename>,
fuseCall<const char *, const char *, &FuseAppBase::link>,
fuseCall<const char *, mode_t, &FuseAppBase::chmod>,
fuseCall<const char *, uid_t, gid_t, &FuseAppBase::chown>,
fuseCall<const char *, off_t, &FuseAppBase::truncate>,
NULL, // utime deprecated
fuseCall<const char *, struct fuse_file_info *, &FuseAppBase::open>,
fuseCall<const char *, char *, size_t, off_t, struct fuse_file_info *, &FuseAppBase::read>,
fuseCall<const char *, const char *, size_t, off_t, struct fuse_file_info *, &FuseAppBase::write>,
fuseCall<const char *, struct statvfs *, &FuseAppBase::statfs>,
fuseCall<const char *, struct fuse_file_info *, &FuseAppBase::flush>,
fuseCall<const char *, struct fuse_file_info *, &FuseAppBase::release>,
fuseCall<const char *, int, struct fuse_file_info *, &FuseAppBase::fsync>,
fuseCall<const char *, const char *, const char *, size_t, int, &FuseAppBase::setxattr>,
fuseCall<const char *, const char *, char *, size_t, &FuseAppBase::getxattr>,
fuseCall<const char *, char *, size_t, &FuseAppBase::listxattr>,
fuseCall<const char *, const char *, &FuseAppBase::removexattr>,
fuseCall<const char *, struct fuse_file_info *, &FuseAppBase::opendir>,
fuseCall<const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *, &FuseAppBase::readdir>,
fuseCall<const char *, struct fuse_file_info *, &FuseAppBase::releasedir>,
fuseCall<const char *, int, struct fuse_file_info *, &FuseAppBase::fsyncdir>,
fuseInit,
fuseDestroy<FuseApp>,
fuseCall<const char *, int, &FuseAppBase::access>,
fuseCall<const char *, mode_t, struct fuse_file_info *, &FuseAppBase::create>,
fuseCall<const char *, off_t, struct fuse_file_info *, &FuseAppBase::ftruncate>,
fuseCall<const char *, struct stat *, struct fuse_file_info *, &FuseAppBase::fgetattr>,
fuseCall<const char *, struct fuse_file_info *, int, struct flock *, &FuseAppBase::lock>,
fuseCall<const char *, const struct timespec [2], &FuseAppBase::utimens>,
fuseCall<const char *, size_t, uint64_t *, &FuseAppBase::bmap>
};
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
if (fuse_opt_parse(&args, fuseApp, fuse_opts,
fuseCall<void *, const char *, int, struct fuse_args *, &FuseAppBase::opt_parse>) == -1) {
exit(1);
}
return fuse_main(args.argc, args.argv, &operations, NULL);
}
int
main(int argc, char* argv[])
{
return runFuseApp<NetFS>(argc, argv);
}
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