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#include "daemonVolume.h"
#include "daemon.h"
#include "daemonDirectory.h"
#include "daemonFile.h"
#include "modeCheck.h"
#include <Ice/ObjectAdapter.h>
#include <boost/algorithm/string/predicate.hpp>
#include <cerrno>
#include <climits>
#include <defaultMapper.h>
#include <entCache.h>
#include <fcntl.h>
#include <map>
#include <sys/stat.h>
#include <unistd.h>
extern std::map<Ice::Int, int> files;
VolumeServer::VolumeServer(
const std::filesystem::path & r, const EntryResolverPtr<User> & u, const EntryResolverPtr<Group> & g) :
root(std::filesystem::canonical(r)),
userLookup(*u), groupLookup(*g), converter(std::make_shared<NetFS::Mapping::DefaultMapper>(u, g))
{
}
void
VolumeServer::disconnect(const Ice::Current & ice)
{
ice.adapter->removeAllFacets(ice.id);
}
Ice::Int
VolumeServer::access(const NetFS::ReqEnv re, std::string path, Ice::Int mode, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
struct stat s {
};
std::filesystem::path p(resolvePath(std::move(path)));
if (::stat(p.c_str(), &s) != 0) {
return errno;
}
if (mode == F_OK) {
// stat succeeded, file must exist
return 0;
}
mc.AssertReadParent(p);
if (mode & R_OK && !mc.ReadableBy(s, mc.myu, mc.myg)) {
return EACCES;
}
if (mode & W_OK && !mc.WritableBy(s, mc.myu, mc.myg)) {
return EACCES;
}
if (mode & X_OK && !mc.ExecutableBy(s, mc.myu, mc.myg)) {
return EACCES;
}
return 0;
}
NetFS::Attr
VolumeServer::getattr(const NetFS::ReqEnv re, std::string path, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
struct stat s {
};
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertReadParent(p);
if (::lstat(p.c_str(), &s) != 0) {
throw NetFS::SystemError(errno);
}
return converter.convert(s);
}
void
VolumeServer::mknod(const NetFS::ReqEnv re, std::string path, Ice::Int mode, Ice::Int dev, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWriteParent(p);
if (::mknod(p.c_str(), mode, dev) != 0) {
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::symlink(const NetFS::ReqEnv re, const std::string path1, std::string path2, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path2)));
mc.AssertWriteParent(p);
if (::symlink(path1.c_str(), p.c_str()) != 0) {
throw NetFS::SystemError(errno);
}
if (::lchown(p.c_str(), mc.myu, mc.myg) != 0) {
::unlink(p.c_str());
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::link(const NetFS::ReqEnv re, std::string path1, std::string path2, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p1(resolvePath(std::move(path1)));
std::filesystem::path p2(resolvePath(std::move(path2)));
if (::link(p1.c_str(), p2.c_str()) != 0) {
throw NetFS::SystemError(errno);
}
if (::chown(p2.c_str(), mc.myu, mc.myg) != 0) {
::unlink(p2.c_str());
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::rename(const NetFS::ReqEnv re, std::string from, std::string to, const Ice::optional<Ice::Int> flags,
const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path t(resolvePath(std::move(to)));
if (flags && *flags == RENAME_NOREPLACE && ::access(t.c_str(), F_OK) == 0) {
throw NetFS::SystemError(EEXIST);
}
std::filesystem::path f(resolvePath(std::move(from)));
mc.AssertWriteParent(f);
mc.AssertWriteParent(t);
if (::rename(f.c_str(), t.c_str()) != 0) {
throw NetFS::SystemError(errno);
}
}
std::string
VolumeServer::readlink(const NetFS::ReqEnv re, std::string path, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::string buf(PATH_MAX, 0);
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertRead(p);
ssize_t rc = ::readlink(p.c_str(), buf.data(), PATH_MAX);
if (rc == -1) {
throw NetFS::SystemError(errno);
}
buf.resize(rc);
return buf;
}
void
VolumeServer::chmod(const NetFS::ReqEnv re, std::string path, Ice::Int mode, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWritePerms(p);
if (::chmod(p.c_str(), mode) != 0) {
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::chown(const NetFS::ReqEnv re, std::string path, Ice::Int uid, Ice::Int gid, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWrite(p);
if (::lchown(p.c_str(), uid, gid) != 0) {
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::utimens(const NetFS::ReqEnv re, std::string path, Ice::Long s0, Ice::Long ns0, Ice::Long s1,
Ice::Long ns1, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::array<struct timespec, 2> times {{{s0, ns0}, {s1, ns1}}};
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWrite(p);
if (::utimensat(0, p.c_str(), times.data(), AT_SYMLINK_NOFOLLOW) != 0) {
throw NetFS::SystemError(errno);
}
}
NetFS::VFS
VolumeServer::statfs(const NetFS::ReqEnv re, std::string path, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
struct statvfs s {
};
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertRead(p);
if (::statvfs(p.c_str(), &s) != 0) {
throw NetFS::SystemError(errno);
}
return converter.TypeConverter::convert(s);
}
void
VolumeServer::truncate(const NetFS::ReqEnv re, std::string path, Ice::Long size, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWrite(p);
if (::truncate(p.c_str(), size) != 0) {
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::unlink(const NetFS::ReqEnv re, std::string path, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWriteParent(p);
if (::unlink(p.c_str()) != 0) {
throw NetFS::SystemError(errno);
}
}
NetFS::FilePrxPtr
VolumeServer::open(const NetFS::ReqEnv re, std::string path, Ice::Int flags, const Ice::Current & ice)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertRead(p);
if (flags & O_CREAT) {
throw NetFS::SystemError(EINVAL);
}
int fd = ::open(p.c_str(), flags);
if (fd == -1) {
throw NetFS::SystemError(errno);
}
return Ice::uncheckedCast<NetFS::FilePrx>(
ice.adapter->addFacetWithUUID(std::make_shared<FileServer>(fd, converter), "v01"));
}
NetFS::FilePrxPtr
VolumeServer::create(const NetFS::ReqEnv re, std::string path, Ice::Int flags, Ice::Int mode, const Ice::Current & ice)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWriteParent(p);
int fd = ::open(p.c_str(), O_CREAT | O_EXCL | flags, mode);
if (fd == -1) {
throw NetFS::SystemError(errno);
}
if (fchown(fd, mc.myu, mc.myg) != 0) {
::close(fd);
::unlink(p.c_str());
throw NetFS::SystemError(errno);
}
return Ice::uncheckedCast<NetFS::FilePrx>(
ice.adapter->addFacetWithUUID(std::make_shared<FileServer>(fd, converter), "v01"));
}
NetFS::DirectoryPrxPtr
VolumeServer::opendir(const NetFS::ReqEnv re, std::string path, const Ice::Current & ice)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertRead(p);
DIR * od = ::opendir(p.c_str());
if (!od) {
throw NetFS::SystemError(errno);
}
return Ice::uncheckedCast<NetFS::DirectoryPrx>(
ice.adapter->addWithUUID(std::make_shared<DirectoryServer>(od, converter)));
}
void
VolumeServer::mkdir(const NetFS::ReqEnv re, std::string path, Ice::Int mode, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWriteParent(p);
if (::mkdir(p.c_str(), mode) != 0) {
throw NetFS::SystemError(errno);
}
if (::chown(p.c_str(), mc.myu, mc.myg) != 0) {
::rmdir(p.c_str());
throw NetFS::SystemError(errno);
}
}
void
VolumeServer::rmdir(const NetFS::ReqEnv re, std::string path, const Ice::Current &)
{
ModeCheck mc(re, root, userLookup, groupLookup);
errno = 0;
std::filesystem::path p(resolvePath(std::move(path)));
mc.AssertWriteParent(p);
if (::rmdir(p.c_str()) != 0) {
throw NetFS::SystemError(errno);
}
}
std::filesystem::path
normalizedAppend(std::filesystem::path out, const std::filesystem::path && in)
{
unsigned int depth = 0;
for (const auto & e : in) {
if (e.empty() || e == "." || e == "/") {
continue;
}
else if (e == "..") {
if (depth == 0) {
throw NetFS::SystemError(EPERM);
}
out.remove_filename();
depth -= 1;
}
else {
out /= e;
depth += 1;
}
}
return out;
}
std::filesystem::path
VolumeServer::resolvePath(std::string && path) const
{
return normalizedAppend(root, std::move(path));
}
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