diff options
Diffstat (limited to 'third_party/nix/src/nix-daemon')
| -rw-r--r-- | third_party/nix/src/nix-daemon/CMakeLists.txt | 29 | ||||
| -rw-r--r-- | third_party/nix/src/nix-daemon/nix-daemon-legacy.cc | 1185 | ||||
| -rw-r--r-- | third_party/nix/src/nix-daemon/nix-daemon-proto.cc | 788 | ||||
| -rw-r--r-- | third_party/nix/src/nix-daemon/nix-daemon-proto.hh | 12 | ||||
| -rw-r--r-- | third_party/nix/src/nix-daemon/nix-daemon.cc | 201 |
5 files changed, 0 insertions, 2215 deletions
diff --git a/third_party/nix/src/nix-daemon/CMakeLists.txt b/third_party/nix/src/nix-daemon/CMakeLists.txt deleted file mode 100644 index 63125a9b26..0000000000 --- a/third_party/nix/src/nix-daemon/CMakeLists.txt +++ /dev/null @@ -1,29 +0,0 @@ -# -*- mode: cmake; -*- - -# The nix-daemon is the binary running the gRPC server component to -# which other components of Nix talk to perform store and builder -# operations. - -add_executable(nix-daemon) -include_directories(${PROJECT_BINARY_DIR}) # for config.h -set_property(TARGET nix-daemon PROPERTY CXX_STANDARD 17) - -pkg_check_modules(systemd REQUIRED) - -target_sources(nix-daemon - PRIVATE - nix-daemon-proto.hh - nix-daemon-proto.cc - nix-daemon.cc -) - -target_link_libraries(nix-daemon - nixutil - nixstore - nixmain - absl::flags - absl::flags_parse - systemd -) - -install(TARGETS nix-daemon DESTINATION bin) diff --git a/third_party/nix/src/nix-daemon/nix-daemon-legacy.cc b/third_party/nix/src/nix-daemon/nix-daemon-legacy.cc deleted file mode 100644 index 97cf5195d3..0000000000 --- a/third_party/nix/src/nix-daemon/nix-daemon-legacy.cc +++ /dev/null @@ -1,1185 +0,0 @@ -/* - NOTE: You are looking at the *previous* implementation of the Nix - daemon. This file is not in use, is only left in here for reference - and will be deleted from the codebase eventually. - */ - -#include <algorithm> -#include <cerrno> -#include <climits> -#include <csignal> -#include <cstring> - -#include <fcntl.h> -#include <glog/logging.h> -#include <grp.h> -#include <pwd.h> -#include <sys/socket.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/un.h> -#include <sys/wait.h> -#include <unistd.h> - -#include "libmain/shared.hh" -#include "libproto/worker.pb.h" -#include "libstore/derivations.hh" -#include "libstore/globals.hh" -#include "libstore/local-store.hh" -#include "libstore/worker-protocol.hh" -#include "libutil/affinity.hh" -#include "libutil/archive.hh" -#include "libutil/finally.hh" -#include "libutil/monitor-fd.hh" -#include "libutil/serialise.hh" -#include "libutil/util.hh" -#include "nix/legacy.hh" - -using namespace nix; - -#ifndef __linux__ -#define SPLICE_F_MOVE 0 -static ssize_t splice(int fd_in, void* off_in, int fd_out, void* off_out, - size_t len, unsigned int flags) { - /* We ignore most parameters, we just have them for conformance with the linux - * syscall */ - std::vector<char> buf(8192); - auto read_count = read(fd_in, buf.data(), buf.size()); - if (read_count == -1) { - return read_count; - } - auto write_count = decltype(read_count)(0); - while (write_count < read_count) { - auto res = - write(fd_out, buf.data() + write_count, read_count - write_count); - if (res == -1) { - return res; - } - write_count += res; - } - return read_count; -} -#endif - -static FdSource from(STDIN_FILENO); -static FdSink to(STDOUT_FILENO); - -/* Logger that forwards log messages to the client, *if* we're in a - state where the protocol allows it (i.e., when canSendStderr is - true). */ -struct TunnelLogger { - struct State { - bool canSendStderr = false; - std::vector<std::string> pendingMsgs; - }; - - Sync<State> state_; - - unsigned int clientVersion; - - explicit TunnelLogger(unsigned int clientVersion) - : clientVersion(clientVersion) {} - - void enqueueMsg(const std::string& s) { - auto state(state_.lock()); - - if (state->canSendStderr) { - assert(state->pendingMsgs.empty()); - try { - to(s); - to.flush(); - } catch (...) { - /* Write failed; that means that the other side is - gone. */ - state->canSendStderr = false; - throw; - } - } else { - state->pendingMsgs.push_back(s); - } - } - - void log(const FormatOrString& fs) { - StringSink buf; - buf << STDERR_NEXT << (fs.s + "\n"); - enqueueMsg(*buf.s); - } - - /* startWork() means that we're starting an operation for which we - want to send out stderr to the client. */ - void startWork() { - auto state(state_.lock()); - state->canSendStderr = true; - - for (auto& msg : state->pendingMsgs) { - to(msg); - } - - state->pendingMsgs.clear(); - - to.flush(); - } - - /* stopWork() means that we're done; stop sending stderr to the - client. */ - void stopWork(bool success = true, const std::string& msg = "", - unsigned int status = 0) { - auto state(state_.lock()); - - state->canSendStderr = false; - - if (success) { - to << STDERR_LAST; - } else { - to << STDERR_ERROR << msg; - if (status != 0) { - to << status; - } - } - } - - void startActivity(const std::string& s) { - DLOG(INFO) << "startActivity(" << s << ")"; - if (GET_PROTOCOL_MINOR(clientVersion) < 20) { - if (!s.empty()) { - LOG(INFO) << s; - } - return; - } - - StringSink buf; - buf << STDERR_START_ACTIVITY << s; - enqueueMsg(*buf.s); - } -}; - -struct TunnelSink : Sink { - Sink& to; - explicit TunnelSink(Sink& to) : to(to) {} - void operator()(const unsigned char* data, size_t len) override { - to << STDERR_WRITE; - writeString(data, len, to); - } -}; - -struct TunnelSource : BufferedSource { - Source& from; - explicit TunnelSource(Source& from) : from(from) {} - - protected: - size_t readUnbuffered(unsigned char* data, size_t len) override { - to << STDERR_READ << len; - to.flush(); - size_t n = readString(data, len, from); - if (n == 0) { - throw EndOfFile("unexpected end-of-file"); - } - return n; - } -}; - -/* If the NAR archive contains a single file at top-level, then save - the contents of the file to `s'. Otherwise barf. */ -struct RetrieveRegularNARSink : ParseSink { - bool regular{true}; - std::string s; - - RetrieveRegularNARSink() {} - - void createDirectory(const Path& path) override { regular = false; } - - void receiveContents(unsigned char* data, unsigned int len) override { - s.append((const char*)data, len); - } - - void createSymlink(const Path& path, const std::string& target) override { - regular = false; - } -}; - -static void performOp(TunnelLogger* logger, const ref<Store>& store, - bool trusted, unsigned int clientVersion, Source& from, - Sink& to, unsigned int op) { - switch (op) { - case wopIsValidPath: { - /* 'readStorePath' could raise an error leading to the connection - being closed. To be able to recover from an invalid path error, - call 'startWork' early, and do 'assertStorePath' afterwards so - that the 'Error' exception handler doesn't close the - connection. */ - Path path = readString(from); - logger->startWork(); - store->assertStorePath(path); - bool result = store->isValidPath(path); - logger->stopWork(); - to << static_cast<uint64_t>(result); - break; - } - - case wopQueryValidPaths: { - auto paths = readStorePaths<PathSet>(*store, from); - logger->startWork(); - PathSet res = store->queryValidPaths(paths); - logger->stopWork(); - to << res; - break; - } - - case wopHasSubstitutes: { - Path path = readStorePath(*store, from); - logger->startWork(); - PathSet res = store->querySubstitutablePaths({path}); - logger->stopWork(); - to << static_cast<uint64_t>(res.find(path) != res.end()); - break; - } - - case wopQuerySubstitutablePaths: { - auto paths = readStorePaths<PathSet>(*store, from); - logger->startWork(); - PathSet res = store->querySubstitutablePaths(paths); - logger->stopWork(); - to << res; - break; - } - - case wopQueryPathHash: { - Path path = readStorePath(*store, from); - logger->startWork(); - auto hash = store->queryPathInfo(path)->narHash; - logger->stopWork(); - to << hash.to_string(Base16, false); - break; - } - - case wopQueryReferences: - case wopQueryReferrers: - case wopQueryValidDerivers: - case wopQueryDerivationOutputs: { - Path path = readStorePath(*store, from); - logger->startWork(); - PathSet paths; - if (op == wopQueryReferences) { - paths = store->queryPathInfo(path)->references; - } else if (op == wopQueryReferrers) { - store->queryReferrers(path, paths); - } else if (op == wopQueryValidDerivers) { - paths = store->queryValidDerivers(path); - } else { - paths = store->queryDerivationOutputs(path); - } - logger->stopWork(); - to << paths; - break; - } - - case wopQueryDerivationOutputNames: { - Path path = readStorePath(*store, from); - logger->startWork(); - StringSet names; - names = store->queryDerivationOutputNames(path); - logger->stopWork(); - to << names; - break; - } - - case wopQueryDeriver: { - Path path = readStorePath(*store, from); - logger->startWork(); - auto deriver = store->queryPathInfo(path)->deriver; - logger->stopWork(); - to << deriver; - break; - } - - case wopQueryPathFromHashPart: { - std::string hashPart = readString(from); - logger->startWork(); - Path path = store->queryPathFromHashPart(hashPart); - logger->stopWork(); - to << path; - break; - } - - case wopAddToStore: { - bool fixed = false; - bool recursive = false; - std::string hashType; - std::string baseName; - from >> baseName >> fixed /* obsolete */ >> recursive >> hashType; - /* Compatibility hack. */ - if (!fixed) { - hashType = "sha256"; - recursive = true; - } - HashType hashAlgo = parseHashType(hashType); - - TeeSource savedNAR(from); - RetrieveRegularNARSink savedRegular; - - if (recursive) { - /* Get the entire NAR dump from the client and save it to - a string so that we can pass it to - addToStoreFromDump(). */ - ParseSink sink; /* null sink; just parse the NAR */ - parseDump(sink, savedNAR); - } else { - parseDump(savedRegular, from); - } - - logger->startWork(); - if (!savedRegular.regular) { - throw Error("regular file expected"); - } - - auto store2 = store.dynamic_pointer_cast<LocalStore>(); - if (!store2) { - throw Error("operation is only supported by LocalStore"); - } - - Path path = store2->addToStoreFromDump( - recursive ? *savedNAR.data : savedRegular.s, baseName, recursive, - hashAlgo); - logger->stopWork(); - - to << path; - break; - } - - case wopAddTextToStore: { - std::string suffix = readString(from); - std::string s = readString(from); - auto refs = readStorePaths<PathSet>(*store, from); - logger->startWork(); - Path path = store->addTextToStore(suffix, s, refs, NoRepair); - logger->stopWork(); - to << path; - break; - } - - case wopExportPath: { - Path path = readStorePath(*store, from); - readInt(from); // obsolete - logger->startWork(); - TunnelSink sink(to); - store->exportPath(path, sink); - logger->stopWork(); - to << 1; - break; - } - - case wopImportPaths: { - logger->startWork(); - TunnelSource source(from); - Paths paths = store->importPaths(source, nullptr, - trusted ? NoCheckSigs : CheckSigs); - logger->stopWork(); - to << paths; - break; - } - - case wopBuildPaths: { - auto drvs = readStorePaths<PathSet>(*store, from); - BuildMode mode = bmNormal; - if (GET_PROTOCOL_MINOR(clientVersion) >= 15) { - mode = (BuildMode)readInt(from); - - /* Repairing is not atomic, so disallowed for "untrusted" - clients. */ - if (mode == bmRepair && !trusted) { - throw Error( - "repairing is not allowed because you are not in " - "'trusted-users'"); - } - } - logger->startWork(); - store->buildPaths(drvs, mode); - logger->stopWork(); - to << 1; - break; - } - - case wopBuildDerivation: { - Path drvPath = readStorePath(*store, from); - BasicDerivation drv; - readDerivation(from, *store, drv); - auto buildMode = (BuildMode)readInt(from); - logger->startWork(); - if (!trusted) { - throw Error("you are not privileged to build derivations"); - } - auto res = store->buildDerivation(drvPath, drv, buildMode); - logger->stopWork(); - to << res.status << res.errorMsg; - break; - } - - case wopEnsurePath: { - Path path = readStorePath(*store, from); - logger->startWork(); - store->ensurePath(path); - logger->stopWork(); - to << 1; - break; - } - - case wopAddTempRoot: { - Path path = readStorePath(*store, from); - logger->startWork(); - store->addTempRoot(path); - logger->stopWork(); - to << 1; - break; - } - - case wopAddIndirectRoot: { - Path path = absPath(readString(from)); - logger->startWork(); - store->addIndirectRoot(path); - logger->stopWork(); - to << 1; - break; - } - - case wopSyncWithGC: { - logger->startWork(); - store->syncWithGC(); - logger->stopWork(); - to << 1; - break; - } - - case wopFindRoots: { - logger->startWork(); - Roots roots = store->findRoots(!trusted); - logger->stopWork(); - - size_t size = 0; - for (auto& i : roots) { - size += i.second.size(); - } - - to << size; - - for (auto& [target, links] : roots) { - for (auto& link : links) { - to << link << target; - } - } - - break; - } - - case wopCollectGarbage: { - GCOptions options; - options.action = (GCOptions::GCAction)readInt(from); - options.pathsToDelete = readStorePaths<PathSet>(*store, from); - from >> options.ignoreLiveness >> options.maxFreed; - // obsolete fields - readInt(from); - readInt(from); - readInt(from); - - GCResults results; - - logger->startWork(); - if (options.ignoreLiveness) { - throw Error("you are not allowed to ignore liveness"); - } - store->collectGarbage(options, results); - logger->stopWork(); - - to << results.paths << results.bytesFreed << 0 /* obsolete */; - - break; - } - - case wopSetOptions: { - settings.keepFailed = readInt(from) != 0u; - settings.keepGoing = readInt(from) != 0u; - settings.tryFallback = readInt(from) != 0u; - readInt(from); // obsolete verbosity - settings.maxBuildJobs.assign(readInt(from)); - settings.maxSilentTime = readInt(from); - readInt(from); // obsolete useBuildHook - settings.verboseBuild = 0 == readInt(from); - readInt(from); // obsolete logType - readInt(from); // obsolete printBuildTrace - settings.buildCores = readInt(from); - settings.useSubstitutes = readInt(from) != 0u; - - StringMap overrides; - if (GET_PROTOCOL_MINOR(clientVersion) >= 12) { - unsigned int n = readInt(from); - for (unsigned int i = 0; i < n; i++) { - std::string name = readString(from); - std::string value = readString(from); - overrides.emplace(name, value); - } - } - - logger->startWork(); - - for (auto& i : overrides) { - auto& name(i.first); - auto& value(i.second); - - auto setSubstituters = [&](Setting<Strings>& res) { - if (name != res.name && res.aliases.count(name) == 0) { - return false; - } - StringSet trusted = settings.trustedSubstituters; - for (auto& s : settings.substituters.get()) { - trusted.insert(s); - } - Strings subs; - Strings ss = absl::StrSplit(value, absl::ByAnyChar(" \t\n\r"), - absl::SkipEmpty()); - for (auto& s : ss) { - if (trusted.count(s) != 0u) { - subs.push_back(s); - } else { - LOG(WARNING) << "ignoring untrusted substituter '" << s << "'"; - } - } - res = subs; - return true; - }; - - try { - if (name == "ssh-auth-sock") { // obsolete - ; - } else if (trusted || name == settings.buildTimeout.name || - name == "connect-timeout" || - (name == "builders" && value.empty())) { - settings.set(name, value); - } else if (setSubstituters(settings.substituters)) { - ; - } else if (setSubstituters(settings.extraSubstituters)) { - ; - } else { - LOG(WARNING) << "ignoring the user-specified setting '" << name - << "', because it is a " - << "restricted setting and you are not a trusted user"; - } - } catch (UsageError& e) { - LOG(WARNING) << e.what(); - } - } - - logger->stopWork(); - break; - } - - case wopQuerySubstitutablePathInfo: { - Path path = absPath(readString(from)); - logger->startWork(); - SubstitutablePathInfos infos; - store->querySubstitutablePathInfos({path}, infos); - logger->stopWork(); - auto i = infos.find(path); - if (i == infos.end()) { - to << 0; - } else { - to << 1 << i->second.deriver << i->second.references - << i->second.downloadSize << i->second.narSize; - } - break; - } - - case wopQuerySubstitutablePathInfos: { - auto paths = readStorePaths<PathSet>(*store, from); - logger->startWork(); - SubstitutablePathInfos infos; - store->querySubstitutablePathInfos(paths, infos); - logger->stopWork(); - to << infos.size(); - for (auto& i : infos) { - to << i.first << i.second.deriver << i.second.references - << i.second.downloadSize << i.second.narSize; - } - break; - } - - case wopQueryAllValidPaths: { - logger->startWork(); - PathSet paths = store->queryAllValidPaths(); - logger->stopWork(); - to << paths; - break; - } - - case wopQueryPathInfo: { - Path path = readStorePath(*store, from); - std::shared_ptr<const ValidPathInfo> info; - logger->startWork(); - try { - info = store->queryPathInfo(path); - } catch (InvalidPath&) { - if (GET_PROTOCOL_MINOR(clientVersion) < 17) { - throw; - } - } - logger->stopWork(); - if (info) { - if (GET_PROTOCOL_MINOR(clientVersion) >= 17) { - to << 1; - } - to << info->deriver << info->narHash.to_string(Base16, false) - << info->references << info->registrationTime << info->narSize; - if (GET_PROTOCOL_MINOR(clientVersion) >= 16) { - to << static_cast<uint64_t>(info->ultimate) << info->sigs << info->ca; - } - } else { - assert(GET_PROTOCOL_MINOR(clientVersion) >= 17); - to << 0; - } - break; - } - - case wopOptimiseStore: { - logger->startWork(); - store->optimiseStore(); - logger->stopWork(); - to << 1; - break; - } - - case wopVerifyStore: { - bool checkContents; - bool repair; - from >> checkContents >> repair; - logger->startWork(); - if (repair && !trusted) { - throw Error("you are not privileged to repair paths"); - } - bool errors = store->verifyStore(checkContents, (RepairFlag)repair); - logger->stopWork(); - to << static_cast<uint64_t>(errors); - break; - } - - case wopAddSignatures: { - Path path = readStorePath(*store, from); - auto sigs = readStrings<StringSet>(from); - logger->startWork(); - if (!trusted) { - throw Error("you are not privileged to add signatures"); - } - store->addSignatures(path, sigs); - logger->stopWork(); - to << 1; - break; - } - - case wopNarFromPath: { - auto path = readStorePath(*store, from); - logger->startWork(); - logger->stopWork(); - dumpPath(path, to); - break; - } - - case wopAddToStoreNar: { - bool repair; - bool dontCheckSigs; - ValidPathInfo info; - info.path = readStorePath(*store, from); - from >> info.deriver; - if (!info.deriver.empty()) { - store->assertStorePath(info.deriver); - } - info.narHash = Hash(readString(from), htSHA256); - info.references = readStorePaths<PathSet>(*store, from); - from >> info.registrationTime >> info.narSize >> info.ultimate; - info.sigs = readStrings<StringSet>(from); - from >> info.ca >> repair >> dontCheckSigs; - if (!trusted && dontCheckSigs) { - dontCheckSigs = false; - } - if (!trusted) { - info.ultimate = false; - } - - std::string saved; - std::unique_ptr<Source> source; - if (GET_PROTOCOL_MINOR(clientVersion) >= 21) { - source = std::make_unique<TunnelSource>(from); - } else { - TeeSink tee(from); - parseDump(tee, tee.source); - saved = std::move(*tee.source.data); - source = std::make_unique<StringSource>(saved); - } - - logger->startWork(); - - // FIXME: race if addToStore doesn't read source? - store->addToStore(info, *source, (RepairFlag)repair, - dontCheckSigs ? NoCheckSigs : CheckSigs, nullptr); - - logger->stopWork(); - break; - } - - case wopQueryMissing: { - auto targets = readStorePaths<PathSet>(*store, from); - logger->startWork(); - PathSet willBuild; - PathSet willSubstitute; - PathSet unknown; - unsigned long long downloadSize; - unsigned long long narSize; - store->queryMissing(targets, willBuild, willSubstitute, unknown, - downloadSize, narSize); - logger->stopWork(); - to << willBuild << willSubstitute << unknown << downloadSize << narSize; - break; - } - - default: - throw Error(format("invalid operation %1%") % op); - } -} - -static void processConnection(bool trusted, const std::string& userName, - uid_t userId) { - MonitorFdHup monitor(from.fd); - - /* Exchange the greeting. */ - unsigned int magic = readInt(from); - if (magic != WORKER_MAGIC_1) { - throw Error("protocol mismatch"); - } - to << WORKER_MAGIC_2 << PROTOCOL_VERSION; - to.flush(); - unsigned int clientVersion = readInt(from); - - if (clientVersion < 0x10a) { - throw Error("the Nix client version is too old"); - } - - auto tunnelLogger = new TunnelLogger(clientVersion); - // logger = tunnelLogger; - - unsigned int opCount = 0; - - Finally finally([&]() { - _isInterrupted = false; - DLOG(INFO) << opCount << " operations"; - }); - - if (GET_PROTOCOL_MINOR(clientVersion) >= 14 && (readInt(from) != 0u)) { - setAffinityTo(readInt(from)); - } - - readInt(from); // obsolete reserveSpace - - /* Send startup error messages to the client. */ - tunnelLogger->startWork(); - - try { - /* If we can't accept clientVersion, then throw an error - *here* (not above). */ - -#if 0 - /* Prevent users from doing something very dangerous. */ - if (geteuid() == 0 && - querySetting("build-users-group", "") == "") - throw Error("if you run 'nix-daemon' as root, then you MUST set 'build-users-group'!"); -#endif - - /* Open the store. */ - Store::Params params; // FIXME: get params from somewhere - // Disable caching since the client already does that. - params["path-info-cache-size"] = "0"; - auto store = openStore(settings.storeUri, params); - - store->createUser(userName, userId); - - tunnelLogger->stopWork(); - to.flush(); - - /* Process client requests. */ - while (true) { - WorkerOp op; - try { - op = (WorkerOp)readInt(from); - } catch (Interrupted& e) { - break; - } catch (EndOfFile& e) { - break; - } - - opCount++; - - try { - performOp(tunnelLogger, store, trusted, clientVersion, from, to, op); - } catch (Error& e) { - /* If we're not in a state where we can send replies, then - something went wrong processing the input of the - client. This can happen especially if I/O errors occur - during addTextToStore() / importPath(). If that - happens, just send the error message and exit. */ - bool errorAllowed = tunnelLogger->state_.lock()->canSendStderr; - tunnelLogger->stopWork(false, e.msg(), e.status); - if (!errorAllowed) { - throw; - } - } catch (std::bad_alloc& e) { - tunnelLogger->stopWork(false, "Nix daemon out of memory", 1); - throw; - } - - to.flush(); - - assert(!tunnelLogger->state_.lock()->canSendStderr); - }; - - } catch (std::exception& e) { - tunnelLogger->stopWork(false, e.what(), 1); - to.flush(); - return; - } -} - -static void sigChldHandler(int sigNo) { - // Ensure we don't modify errno of whatever we've interrupted - auto saved_errno = errno; - /* Reap all dead children. */ - while (waitpid(-1, nullptr, WNOHANG) > 0) { - ; - } - errno = saved_errno; -} - -static void setSigChldAction(bool autoReap) { - struct sigaction act; - struct sigaction oact; - act.sa_handler = autoReap ? sigChldHandler : SIG_DFL; - sigfillset(&act.sa_mask); - act.sa_flags = 0; - if (sigaction(SIGCHLD, &act, &oact) != 0) { - throw SysError("setting SIGCHLD handler"); - } -} - -bool matchUser(const std::string& user, const std::string& group, - const Strings& users) { - if (find(users.begin(), users.end(), "*") != users.end()) { - return true; - } - - if (find(users.begin(), users.end(), user) != users.end()) { - return true; - } - - for (auto& i : users) { - if (std::string(i, 0, 1) == "@") { - if (group == std::string(i, 1)) { - return true; - } - struct group* gr = getgrnam(i.c_str() + 1); - if (gr == nullptr) { - continue; - } - for (char** mem = gr->gr_mem; *mem != nullptr; mem++) { - if (user == std::string(*mem)) { - return true; - } - } - } - } - - return false; -} - -struct PeerInfo { - bool pidKnown; - pid_t pid; - bool uidKnown; - uid_t uid; - bool gidKnown; - gid_t gid; -}; - -/* Get the identity of the caller, if possible. */ -static PeerInfo getPeerInfo(int remote) { - PeerInfo peer = {false, 0, false, 0, false, 0}; - -#if defined(SO_PEERCRED) - - ucred cred; - socklen_t credLen = sizeof(cred); - if (getsockopt(remote, SOL_SOCKET, SO_PEERCRED, &cred, &credLen) == -1) { - throw SysError("getting peer credentials"); - } - peer = {true, cred.pid, true, cred.uid, true, cred.gid}; - -#elif defined(LOCAL_PEERCRED) - -#if !defined(SOL_LOCAL) -#define SOL_LOCAL 0 -#endif - - xucred cred; - socklen_t credLen = sizeof(cred); - if (getsockopt(remote, SOL_LOCAL, LOCAL_PEERCRED, &cred, &credLen) == -1) - throw SysError("getting peer credentials"); - peer = {false, 0, true, cred.cr_uid, false, 0}; - -#endif - - return peer; -} - -#define SD_LISTEN_FDS_START 3 - -static void daemonLoop(char** argv) { - if (chdir("/") == -1) { - throw SysError("cannot change current directory"); - } - - /* Get rid of children automatically; don't let them become - zombies. */ - setSigChldAction(true); - - AutoCloseFD fdSocket; - - /* Handle socket-based activation by systemd. */ - if (!getEnv("LISTEN_FDS").empty()) { - if (getEnv("LISTEN_PID") != std::to_string(getpid()) || - getEnv("LISTEN_FDS") != "1") { - throw Error("unexpected systemd environment variables"); - } - fdSocket = SD_LISTEN_FDS_START; - } - - /* Otherwise, create and bind to a Unix domain socket. */ - else { - /* Create and bind to a Unix domain socket. */ - fdSocket = socket(PF_UNIX, SOCK_STREAM, 0); - if (!fdSocket) { - throw SysError("cannot create Unix domain socket"); - } - - std::string socketPath = settings.nixDaemonSocketFile; - - createDirs(dirOf(socketPath)); - - /* Urgh, sockaddr_un allows path names of only 108 characters. - So chdir to the socket directory so that we can pass a - relative path name. */ - if (chdir(dirOf(socketPath).c_str()) == -1) { - throw SysError("cannot change current directory"); - } - Path socketPathRel = "./" + baseNameOf(socketPath); - - struct sockaddr_un addr; - addr.sun_family = AF_UNIX; - strncpy(addr.sun_path, socketPathRel.c_str(), sizeof(addr.sun_path)); - if (addr.sun_path[sizeof(addr.sun_path) - 1] != '\0') { - throw Error(format("socket path '%1%' is too long") % socketPathRel); - } - - unlink(socketPath.c_str()); - - /* Make sure that the socket is created with 0666 permission - (everybody can connect --- provided they have access to the - directory containing the socket). */ - mode_t oldMode = umask(0111); - int res = bind(fdSocket.get(), (struct sockaddr*)&addr, sizeof(addr)); - umask(oldMode); - if (res == -1) { - throw SysError(format("cannot bind to socket '%1%'") % socketPath); - } - - if (chdir("/") == -1) { /* back to the root */ - throw SysError("cannot change current directory"); - } - - if (listen(fdSocket.get(), 5) == -1) { - throw SysError(format("cannot listen on socket '%1%'") % socketPath); - } - } - - closeOnExec(fdSocket.get()); - - /* Loop accepting connections. */ - while (true) { - try { - /* Accept a connection. */ - struct sockaddr_un remoteAddr; - socklen_t remoteAddrLen = sizeof(remoteAddr); - - AutoCloseFD remote = - accept(fdSocket.get(), (struct sockaddr*)&remoteAddr, &remoteAddrLen); - checkInterrupt(); - if (!remote) { - if (errno == EINTR) { - continue; - } - throw SysError("accepting connection"); - } - - closeOnExec(remote.get()); - - bool trusted = false; - PeerInfo peer = getPeerInfo(remote.get()); - - struct passwd* pw = peer.uidKnown ? getpwuid(peer.uid) : nullptr; - std::string user = pw != nullptr ? pw->pw_name : std::to_string(peer.uid); - - struct group* gr = peer.gidKnown ? getgrgid(peer.gid) : nullptr; - std::string group = - gr != nullptr ? gr->gr_name : std::to_string(peer.gid); - - Strings trustedUsers = settings.trustedUsers; - Strings allowedUsers = settings.allowedUsers; - - if (matchUser(user, group, trustedUsers)) { - trusted = true; - } - - if ((!trusted && !matchUser(user, group, allowedUsers)) || - group == settings.buildUsersGroup) { - throw Error( - format("user '%1%' is not allowed to connect to the Nix daemon") % - user); - } - - LOG(INFO) << "accepted connection from pid " - << (peer.pidKnown ? std::to_string(peer.pid) : "<unknown>") - << ", user " << (peer.uidKnown ? user : "<unknown>") - << (trusted ? " (trusted)" : ""); - - /* Fork a child to handle the connection. */ - ProcessOptions options; - options.errorPrefix = "unexpected Nix daemon error: "; - options.dieWithParent = false; - options.runExitHandlers = true; - startProcess( - [&]() { - fdSocket = -1; - - /* Background the daemon. */ - if (setsid() == -1) { - throw SysError(format("creating a new session")); - } - - /* Restore normal handling of SIGCHLD. */ - setSigChldAction(false); - - /* For debugging, stuff the pid into argv[1]. */ - if (peer.pidKnown && (argv[1] != nullptr)) { - std::string processName = std::to_string(peer.pid); - strncpy(argv[1], processName.c_str(), strlen(argv[1])); - } - - /* Handle the connection. */ - from.fd = remote.get(); - to.fd = remote.get(); - processConnection(trusted, user, peer.uid); - - exit(0); - }, - options); - - } catch (Interrupted& e) { - return; - } catch (Error& e) { - LOG(ERROR) << "error processing connection: " << e.msg(); - } - } -} - -static int _main(int argc, char** argv) { - { - auto stdio = false; - - parseCmdLine(argc, argv, - [&](Strings::iterator& arg, const Strings::iterator& end) { - if (*arg == "--daemon") { - ; /* ignored for backwards compatibility */ - } else if (*arg == "--help") { - showManPage("nix-daemon"); - } else if (*arg == "--version") { - printVersion("nix-daemon"); - } else if (*arg == "--stdio") { - stdio = true; - } else { - return false; - } - return true; - }); - - if (stdio) { - if (getStoreType() == tDaemon) { - /* Forward on this connection to the real daemon */ - auto socketPath = settings.nixDaemonSocketFile; - auto s = socket(PF_UNIX, SOCK_STREAM, 0); - if (s == -1) { - throw SysError("creating Unix domain socket"); - } - - auto socketDir = dirOf(socketPath); - if (chdir(socketDir.c_str()) == -1) { - throw SysError(format("changing to socket directory '%1%'") % - socketDir); - } - - auto socketName = baseNameOf(socketPath); - auto addr = sockaddr_un{}; - addr.sun_family = AF_UNIX; - strncpy(addr.sun_path, socketName.c_str(), sizeof(addr.sun_path)); - if (addr.sun_path[sizeof(addr.sun_path) - 1] != '\0') { - throw Error(format("socket name %1% is too long") % socketName); - } - - if (connect(s, (struct sockaddr*)&addr, sizeof(addr)) == -1) { - throw SysError(format("cannot connect to daemon at %1%") % - socketPath); - } - - auto nfds = (s > STDIN_FILENO ? s : STDIN_FILENO) + 1; - while (true) { - fd_set fds; - FD_ZERO(&fds); - FD_SET(s, &fds); - FD_SET(STDIN_FILENO, &fds); - if (select(nfds, &fds, nullptr, nullptr, nullptr) == -1) { - throw SysError("waiting for data from client or server"); - } - if (FD_ISSET(s, &fds)) { - auto res = splice(s, nullptr, STDOUT_FILENO, nullptr, SSIZE_MAX, - SPLICE_F_MOVE); - if (res == -1) { - throw SysError("splicing data from daemon socket to stdout"); - } - if (res == 0) { - throw EndOfFile("unexpected EOF from daemon socket"); - } - } - if (FD_ISSET(STDIN_FILENO, &fds)) { - auto res = splice(STDIN_FILENO, nullptr, s, nullptr, SSIZE_MAX, - SPLICE_F_MOVE); - if (res == -1) { - throw SysError("splicing data from stdin to daemon socket"); - } - if (res == 0) { - return 0; - } - } - } - } else { - processConnection(true, "root", 0); - } - } else { - daemonLoop(argv); - } - - return 0; - } -} - -static RegisterLegacyCommand s1("nix-daemon", _main); diff --git a/third_party/nix/src/nix-daemon/nix-daemon-proto.cc b/third_party/nix/src/nix-daemon/nix-daemon-proto.cc deleted file mode 100644 index 79ff9cadc2..0000000000 --- a/third_party/nix/src/nix-daemon/nix-daemon-proto.cc +++ /dev/null @@ -1,788 +0,0 @@ -#include "nix-daemon-proto.hh" - -#include <filesystem> -#include <ostream> -#include <sstream> -#include <streambuf> -#include <string> - -#include <absl/strings/str_cat.h> -#include <absl/strings/str_format.h> -#include <google/protobuf/empty.pb.h> -#include <google/protobuf/util/time_util.h> -#include <grpcpp/impl/codegen/server_context.h> -#include <grpcpp/impl/codegen/status.h> -#include <grpcpp/impl/codegen/status_code_enum.h> -#include <grpcpp/impl/codegen/sync_stream.h> - -#include "libmain/shared.hh" -#include "libproto/worker.grpc.pb.h" -#include "libproto/worker.pb.h" -#include "libstore/derivations.hh" -#include "libstore/local-store.hh" -#include "libstore/store-api.hh" -#include "libutil/archive.hh" -#include "libutil/hash.hh" -#include "libutil/proto.hh" -#include "libutil/serialise.hh" -#include "libutil/types.hh" - -namespace nix::daemon { - -using ::google::protobuf::util::TimeUtil; -using ::grpc::Status; -using ::nix::proto::PathInfo; -using ::nix::proto::StorePath; -using ::nix::proto::StorePaths; -using ::nix::proto::WorkerService; - -template <typename Request> -class RPCSource final : public Source { - public: - using Reader = grpc::ServerReader<Request>; - explicit RPCSource(Reader* reader) : reader_(reader) {} - - size_t read(unsigned char* data, size_t len) override { - auto got = buffer_.sgetn(reinterpret_cast<char*>(data), len); - if (got < len) { - Request msg; - if (!reader_->Read(&msg)) { - return got; - } - if (msg.add_oneof_case() != Request::kData) { - // TODO(grfn): Make Source::read return a StatusOr and get rid of this - // throw - throw Error( - "Invalid AddToStoreRequest: all messages except the first must " - "contain data"); - } - buffer_.sputn(msg.data().data(), msg.data().length()); - return got + read(data + got, len - got); - } - return got; - }; - - private: - std::stringbuf buffer_; - Reader* reader_; -}; - -// TODO(grfn): Make this some sort of pipe so we don't have to store data in -// memory -/* If the NAR archive contains a single file at top-level, then save - the contents of the file to `s'. Otherwise barf. */ -struct RetrieveRegularNARSink : ParseSink { - bool regular{true}; - std::string s; - - RetrieveRegularNARSink() {} - - void createDirectory(const Path& path) override { regular = false; } - - void receiveContents(unsigned char* data, unsigned int len) override { - s.append(reinterpret_cast<const char*>(data), len); - } - - void createSymlink(const Path& path, const std::string& target) override { - regular = false; - } -}; - -#define ASSERT_INPUT_STORE_PATH(path) \ - if (!store_->isStorePath(path)) { \ - return Status(grpc::StatusCode::INVALID_ARGUMENT, \ - absl::StrFormat("path '%s' is not in the Nix store", path)); \ - } - -class BuildLogStreambuf final : public std::streambuf { - public: - using Writer = grpc::ServerWriter<nix::proto::BuildEvent>; - explicit BuildLogStreambuf(Writer* writer) : writer_(writer) {} - - std::streamsize xsputn(const char_type* s, std::streamsize n) override { - nix::proto::BuildEvent event; - event.mutable_build_log()->set_line(s, n); - writer_->Write(event); - return n; - } - - private: - Writer* writer_{}; -}; - -class WorkerServiceImpl final : public WorkerService::Service { - public: - WorkerServiceImpl(nix::Store& store) : store_(&store) {} - - Status IsValidPath(grpc::ServerContext* context, const StorePath* request, - nix::proto::IsValidPathResponse* response) override { - return HandleExceptions( - [&]() -> Status { - const auto& path = request->path(); - response->set_is_valid(store_->isValidPath(path)); - - return Status::OK; - }, - __FUNCTION__); - } - - Status HasSubstitutes(grpc::ServerContext* context, const StorePath* request, - nix::proto::HasSubstitutesResponse* response) override { - return HandleExceptions( - [&]() -> Status { - const auto& path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - PathSet res = store_->querySubstitutablePaths({path}); - response->set_has_substitutes(res.find(path) != res.end()); - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryReferrers(grpc::ServerContext* context, const StorePath* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - const auto& path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - - PathSet paths; - store_->queryReferrers(path, paths); - - for (const auto& path : paths) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status AddToStore(grpc::ServerContext* context, - grpc::ServerReader<nix::proto::AddToStoreRequest>* reader, - nix::proto::StorePath* response) override { - return HandleExceptions( - [&]() -> Status { - proto::AddToStoreRequest metadata_request; - auto has_metadata = reader->Read(&metadata_request); - - if (!has_metadata || !metadata_request.has_meta()) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Metadata must be set before sending file content"); - } - - auto meta = metadata_request.meta(); - RPCSource source(reader); - auto opt_hash_type = hash_type_from(meta.hash_type()); - if (!opt_hash_type) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Invalid hash type"); - } - - std::string* data; - RetrieveRegularNARSink nar; - TeeSource saved_nar(source); - - if (meta.recursive()) { - // TODO(grfn): Don't store the full data in memory, instead just - // make addToStoreFromDump take a Source - ParseSink sink; - parseDump(sink, saved_nar); - data = &(*saved_nar.data); - } else { - parseDump(nar, source); - if (!nar.regular) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Regular file expected"); - } - data = &nar.s; - } - - auto local_store = store_.dynamic_pointer_cast<LocalStore>(); - if (!local_store) { - return Status(grpc::StatusCode::FAILED_PRECONDITION, - "operation is only supported by LocalStore"); - } - - auto path = local_store->addToStoreFromDump( - *data, meta.base_name(), meta.recursive(), opt_hash_type.value()); - - response->set_path(path); - - return Status::OK; - }, - __FUNCTION__); - } - - Status AddToStoreNar( - grpc::ServerContext* context, - grpc::ServerReader<nix::proto::AddToStoreNarRequest>* reader, - google::protobuf::Empty*) override { - return HandleExceptions( - [&]() -> Status { - proto::AddToStoreNarRequest path_info_request; - auto has_path_info = reader->Read(&path_info_request); - if (!has_path_info || !path_info_request.has_path_info()) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Path info must be set before sending nar content"); - } - - auto path_info = path_info_request.path_info(); - - ValidPathInfo info; - info.path = path_info.path().path(); - info.deriver = path_info.deriver().path(); - - if (!info.deriver.empty()) { - ASSERT_INPUT_STORE_PATH(info.deriver); - } - - auto nar_hash = Hash::deserialize(path_info.nar_hash(), htSHA256); - - if (!nar_hash.ok()) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - std::string(nar_hash.status().message())); - } - - info.narHash = nar_hash.ConsumeValueOrDie(); - for (const auto& ref : path_info.references()) { - info.references.insert(ref); - } - info.registrationTime = - TimeUtil::TimestampToTimeT(path_info.registration_time()); - info.narSize = path_info.nar_size(); - info.ultimate = path_info.ultimate(); - for (const auto& sig : path_info.sigs()) { - info.sigs.insert(sig); - } - info.ca = path_info.ca(); - - auto repair = path_info.repair(); - auto check_sigs = path_info.check_sigs(); - - std::string saved; - RPCSource source(reader); - store_->addToStore(info, source, repair ? Repair : NoRepair, - check_sigs ? CheckSigs : NoCheckSigs, nullptr); - - return Status::OK; - }, - __FUNCTION__); - } - - Status AddTextToStore( - grpc::ServerContext*, - grpc::ServerReader<nix::proto::AddTextToStoreRequest>* reader, - nix::proto::StorePath* response) override { - return HandleExceptions( - [&]() -> Status { - proto::AddTextToStoreRequest request; - auto has_metadata = reader->Read(&request); - if (!has_metadata || !request.has_meta()) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Metadata must be set before sending content"); - } - - proto::AddTextToStoreRequest_Metadata meta = request.meta(); - - PathSet references; - for (const auto& ref : meta.references()) { - references.insert(ref); - } - - std::string content; - content.reserve(meta.size()); - while (reader->Read(&request)) { - if (request.add_oneof_case() != request.kData) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "All requests except the first must contain data"); - } - - content.append(request.data()); - } - - auto path = store_->addTextToStore(meta.name(), content, references); - response->set_path(path); - return Status::OK; - }, - __FUNCTION__); - } - - Status BuildPaths( - grpc::ServerContext*, const nix::proto::BuildPathsRequest* request, - grpc::ServerWriter<nix::proto::BuildEvent>* writer) override { - return HandleExceptions( - [&]() -> Status { - PathSet drvs; - for (const auto& drv : request->drvs()) { - drvs.insert(drv); - } - auto mode = BuildModeFrom(request->mode()); - - if (!mode.has_value()) { - return Status(grpc::StatusCode::INTERNAL, "Invalid build mode"); - } - - BuildLogStreambuf log_buffer(writer); - std::ostream log_sink(&log_buffer); - - // TODO(grfn): If mode is repair and not trusted, we need to return an - // error here (but we can't yet because we don't know anything about - // trusted users) - return nix::util::proto::AbslToGRPCStatus( - store_->buildPaths(log_sink, drvs, mode.value())); - }, - __FUNCTION__); - } - - Status EnsurePath(grpc::ServerContext* context, - const nix::proto::StorePath* request, - google::protobuf::Empty*) override { - auto path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - return HandleExceptions( - [&]() -> Status { - store_->ensurePath(path); - return Status::OK; - }, - __FUNCTION__); - } - - Status AddTempRoot(grpc::ServerContext*, const nix::proto::StorePath* request, - google::protobuf::Empty*) override { - auto path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - - return HandleExceptions( - [&]() -> Status { - store_->addTempRoot(path); - return Status::OK; - }, - __FUNCTION__); - } - - Status AddIndirectRoot(grpc::ServerContext*, - const nix::proto::StorePath* request, - google::protobuf::Empty*) override { - auto path = std::filesystem::canonical(request->path()); - ASSERT_INPUT_STORE_PATH(path); - - return HandleExceptions( - [&]() -> Status { - store_->addIndirectRoot(path); - return Status::OK; - }, - __FUNCTION__); - } - - Status SyncWithGC(grpc::ServerContext*, const google::protobuf::Empty*, - google::protobuf::Empty*) override { - return HandleExceptions( - [&]() -> Status { - store_->syncWithGC(); - return Status::OK; - }, - __FUNCTION__); - } - - Status FindRoots(grpc::ServerContext*, const google::protobuf::Empty*, - nix::proto::FindRootsResponse* response) override { - return HandleExceptions( - [&]() -> Status { - auto roots = store_->findRoots(false); - for (const auto& [target, links] : roots) { - StorePaths link_paths; - for (const auto& link : links) { - link_paths.add_paths(link); - } - response->mutable_roots()->insert({target, link_paths}); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status CollectGarbage(grpc::ServerContext*, - const proto::CollectGarbageRequest* request, - proto::CollectGarbageResponse* response) override { - return HandleExceptions( - [&]() -> Status { - GCOptions options; - auto action = GCActionFromProto(request->action()); - if (!action.has_value()) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "Invalid GC action"); - } - - options.action = action.value(); - for (const auto& path : request->paths_to_delete()) { - options.pathsToDelete.insert(path); - } - options.ignoreLiveness = request->ignore_liveness(); - options.maxFreed = request->max_freed(); - - if (options.ignoreLiveness) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, - "you are not allowed to ignore liveness"); - } - - GCResults results; - store_->collectGarbage(options, results); - - for (const auto& path : results.paths) { - response->add_deleted_paths(path); - } - response->set_bytes_freed(results.bytesFreed); - - return Status::OK; - }, - __FUNCTION__); - } - - Status QuerySubstitutablePathInfos( - grpc::ServerContext*, const StorePaths* request, - nix::proto::SubstitutablePathInfos* response) override { - return HandleExceptions( - [&]() -> Status { - SubstitutablePathInfos infos; - PathSet paths; - for (const auto& path : request->paths()) { - paths.insert(path); - } - store_->querySubstitutablePathInfos(paths, infos); - for (const auto& [path, path_info] : infos) { - auto proto_path_info = response->add_path_infos(); - proto_path_info->mutable_path()->set_path(path); - proto_path_info->mutable_deriver()->set_path(path_info.deriver); - for (const auto& ref : path_info.references) { - proto_path_info->add_references(ref); - } - proto_path_info->set_download_size(path_info.downloadSize); - proto_path_info->set_nar_size(path_info.narSize); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryValidDerivers(grpc::ServerContext* context, - const StorePath* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - const auto& path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - - PathSet paths = store_->queryValidDerivers(path); - - for (const auto& path : paths) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryDerivationOutputs(grpc::ServerContext* context, - const StorePath* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - const auto& path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - - PathSet paths = store_->queryDerivationOutputs(path); - - for (const auto& path : paths) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryAllValidPaths(grpc::ServerContext* context, - const google::protobuf::Empty* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - const auto paths = store_->queryAllValidPaths(); - for (const auto& path : paths) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryPathInfo(grpc::ServerContext* context, const StorePath* request, - PathInfo* response) override { - return HandleExceptions( - [&]() -> Status { - auto path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - - response->mutable_path()->set_path(path); - try { - auto info = store_->queryPathInfo(path); - response->mutable_deriver()->set_path(info->deriver); - response->set_nar_hash( - reinterpret_cast<const char*>(&info->narHash.hash[0]), - info->narHash.hashSize); - - for (const auto& reference : info->references) { - response->add_references(reference); - } - - *response->mutable_registration_time() = - google::protobuf::util::TimeUtil::TimeTToTimestamp( - info->registrationTime); - - response->set_nar_size(info->narSize); - response->set_ultimate(info->ultimate); - - for (const auto& sig : info->sigs) { - response->add_sigs(sig); - } - - response->set_ca(info->ca); - - return Status::OK; - } catch (InvalidPath& e) { - return Status(grpc::StatusCode::INVALID_ARGUMENT, e.msg()); - } - }, - __FUNCTION__); - } - - Status QueryDerivationOutputNames( - grpc::ServerContext* context, const StorePath* request, - nix::proto::DerivationOutputNames* response) override { - return HandleExceptions( - [&]() -> Status { - auto path = request->path(); - ASSERT_INPUT_STORE_PATH(path); - auto names = store_->queryDerivationOutputNames(path); - for (const auto& name : names) { - response->add_names(name); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryPathFromHashPart(grpc::ServerContext* context, - const nix::proto::HashPart* request, - StorePath* response) override { - return HandleExceptions( - [&]() -> Status { - auto hash_part = request->hash_part(); - auto path = store_->queryPathFromHashPart(hash_part); - ASSERT_INPUT_STORE_PATH(path); - response->set_path(path); - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryValidPaths(grpc::ServerContext* context, - const StorePaths* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - std::set<Path> paths; - for (const auto& path : request->paths()) { - ASSERT_INPUT_STORE_PATH(path); - paths.insert(path); - } - - auto res = store_->queryValidPaths(paths); - - for (const auto& path : res) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status QuerySubstitutablePaths(grpc::ServerContext* context, - const StorePaths* request, - StorePaths* response) override { - return HandleExceptions( - [&]() -> Status { - std::set<Path> paths; - for (const auto& path : request->paths()) { - ASSERT_INPUT_STORE_PATH(path); - paths.insert(path); - } - - auto res = store_->querySubstitutablePaths(paths); - - for (const auto& path : res) { - response->add_paths(path); - } - - return Status::OK; - }, - __FUNCTION__); - } - - Status OptimiseStore(grpc::ServerContext* context, - const google::protobuf::Empty* request, - google::protobuf::Empty* response) override { - return HandleExceptions( - [&]() -> Status { - store_->optimiseStore(); - return Status::OK; - }, - __FUNCTION__); - } - - Status VerifyStore(grpc::ServerContext* context, - const nix::proto::VerifyStoreRequest* request, - nix::proto::VerifyStoreResponse* response) override { - return HandleExceptions( - [&]() -> Status { - auto errors = - store_->verifyStore(request->check_contents(), - static_cast<RepairFlag>(request->repair())); - - response->set_errors(errors); - - return Status::OK; - }, - __FUNCTION__); - } - - Status BuildDerivation( - grpc::ServerContext* context, - const nix::proto::BuildDerivationRequest* request, - grpc::ServerWriter<nix::proto::BuildEvent>* writer) override { - return HandleExceptions( - [&]() -> Status { - auto drv_path = request->drv_path().path(); - ASSERT_INPUT_STORE_PATH(drv_path); - auto drv = - BasicDerivation::from_proto(&request->derivation(), *store_); - - auto build_mode = nix::BuildModeFrom(request->build_mode()); - if (!build_mode) { - return Status(grpc::StatusCode::INTERNAL, "Invalid build mode"); - } - - BuildResult res = store_->buildDerivation(drv_path, drv, *build_mode); - - proto::BuildResult proto_res{}; - proto_res.set_status(res.status_to_proto()); - - if (!res.errorMsg.empty()) { - proto_res.set_msg(res.errorMsg); - } - - proto::BuildEvent event{}; - *event.mutable_result() = proto_res; - - writer->Write(event); - return Status::OK; - }, - __FUNCTION__); - } - - Status AddSignatures(grpc::ServerContext* context, - const nix::proto::AddSignaturesRequest* request, - google::protobuf::Empty* response) override { - return HandleExceptions( - [&]() -> Status { - auto path = request->path().path(); - ASSERT_INPUT_STORE_PATH(path); - - StringSet sigs; - sigs.insert(request->sigs().sigs().begin(), - request->sigs().sigs().end()); - - store_->addSignatures(path, sigs); - - return Status::OK; - }, - __FUNCTION__); - } - - Status QueryMissing(grpc::ServerContext* context, const StorePaths* request, - nix::proto::QueryMissingResponse* response) override { - return HandleExceptions( - [&]() -> Status { - std::set<Path> targets; - for (auto& path : request->paths()) { - ASSERT_INPUT_STORE_PATH(path); - targets.insert(path); - } - PathSet will_build; - PathSet will_substitute; - PathSet unknown; - // TODO(grfn): Switch to concrete size type - unsigned long long download_size; - unsigned long long nar_size; - - store_->queryMissing(targets, will_build, will_substitute, unknown, - download_size, nar_size); - for (auto& path : will_build) { - response->add_will_build(path); - } - for (auto& path : will_substitute) { - response->add_will_substitute(path); - } - for (auto& path : unknown) { - response->add_unknown(path); - } - response->set_download_size(download_size); - response->set_nar_size(nar_size); - - return Status::OK; - }, - __FUNCTION__); - }; - - Status GetBuildLog(grpc::ServerContext* context, const StorePath* request, - proto::BuildLog* response) override { - return HandleExceptions( - [&]() -> Status { - const auto log = store_->getBuildLog(request->path()); - if (log) { - response->set_build_log(*log); - } - return Status::OK; - }, - __FUNCTION__); - } - - private: - Status HandleExceptions(std::function<Status(void)> fn, - absl::string_view methodName) { - try { - return fn(); - } catch (Unsupported& e) { - return Status(grpc::StatusCode::UNIMPLEMENTED, - absl::StrCat(methodName, " is not supported: ", e.what())); - } catch (Error& e) { - return Status(grpc::StatusCode::INTERNAL, e.what()); - } - // add more specific Error-Status mappings above - } - - ref<nix::Store> store_; -}; - -WorkerService::Service* NewWorkerService(nix::Store& store) { - return new WorkerServiceImpl(store); -} - -} // namespace nix::daemon diff --git a/third_party/nix/src/nix-daemon/nix-daemon-proto.hh b/third_party/nix/src/nix-daemon/nix-daemon-proto.hh deleted file mode 100644 index ca871213eb..0000000000 --- a/third_party/nix/src/nix-daemon/nix-daemon-proto.hh +++ /dev/null @@ -1,12 +0,0 @@ -#pragma once - -#include <memory> - -#include "libproto/worker.grpc.pb.h" -#include "libstore/store-api.hh" - -namespace nix::daemon { - -nix::proto::WorkerService::Service* NewWorkerService(nix::Store&); - -} // namespace nix::daemon diff --git a/third_party/nix/src/nix-daemon/nix-daemon.cc b/third_party/nix/src/nix-daemon/nix-daemon.cc deleted file mode 100644 index fd7a553e20..0000000000 --- a/third_party/nix/src/nix-daemon/nix-daemon.cc +++ /dev/null @@ -1,201 +0,0 @@ -#include <filesystem> - -#include <absl/flags/flag.h> -#include <absl/flags/parse.h> -#include <absl/flags/usage_config.h> -#include <absl/strings/str_format.h> -#include <fcntl.h> -#include <glog/logging.h> -#include <grpcpp/security/server_credentials.h> -#include <grpcpp/server.h> -#include <grpcpp/server_builder.h> -#include <grpcpp/server_posix.h> -#include <sys/socket.h> -#include <sys/un.h> -#include <systemd/sd-daemon.h> - -#include "libmain/shared.hh" // TODO(tazjin): can this be removed? -#include "libstore/globals.hh" -#include "libstore/store-api.hh" -#include "libutil/util.hh" -#include "nix-daemon-proto.hh" -#include "nix-daemon/nix-daemon-proto.hh" -#include "nix/legacy.hh" - -ABSL_FLAG(bool, pipe, false, "Use pipes for daemon communication"); - -namespace nix::daemon { - -using grpc::Server; -using grpc_impl::ServerBuilder; - -namespace { - -// TODO(grfn): There has to be a better way to do this - this was ported -// verbatim from the old daemon implementation without much critical evaluation. -static int ForwardToSocket(nix::Path socket_path) { - // Forward on this connection to the real daemon - int sockfd = socket(PF_UNIX, SOCK_STREAM, 0); - if (sockfd == -1) { - throw SysError("creating Unix domain socket"); - } - - auto socketDir = dirOf(socket_path); - if (chdir(socketDir.c_str()) == -1) { - throw SysError(format("changing to socket directory '%1%'") % socketDir); - } - - auto socketName = baseNameOf(socket_path); - auto addr = sockaddr_un{}; - addr.sun_family = AF_UNIX; - if (socketName.size() + 1 >= sizeof(addr.sun_path)) { - throw Error(format("socket name %1% is too long") % socketName); - } - strncpy(addr.sun_path, socketName.c_str(), sizeof(addr.sun_family)); - - if (connect(sockfd, reinterpret_cast<struct sockaddr*>(&addr), - sizeof(addr)) == -1) { - throw SysError(format("cannot connect to daemon at %1%") % socket_path); - } - - auto nfds = (sockfd > STDIN_FILENO ? sockfd : STDIN_FILENO) + 1; - while (true) { - fd_set fds; - FD_ZERO(&fds); - FD_SET(sockfd, &fds); - FD_SET(STDIN_FILENO, &fds); - if (select(nfds, &fds, nullptr, nullptr, nullptr) == -1) { - throw SysError("waiting for data from client or server"); - } - if (FD_ISSET(sockfd, &fds)) { - auto res = splice(sockfd, nullptr, STDOUT_FILENO, nullptr, SSIZE_MAX, - SPLICE_F_MOVE); - if (res == -1) { - throw SysError("splicing data from daemon socket to stdout"); - } - if (res == 0) { - throw EndOfFile("unexpected EOF from daemon socket"); - } - } - if (FD_ISSET(STDIN_FILENO, &fds)) { - auto res = splice(STDIN_FILENO, nullptr, sockfd, nullptr, SSIZE_MAX, - SPLICE_F_MOVE); - if (res == -1) { - throw SysError("splicing data from stdin to daemon socket"); - } - if (res == 0) { - return 0; - } - } - } -} - -void SetNonBlocking(int fd) { - int flags = fcntl(fd, F_GETFL); // NOLINT - PCHECK(flags != 0) << "Error getting socket flags"; - PCHECK(fcntl( // NOLINT - fd, F_SETFL, flags | O_NONBLOCK) == 0) - << "Could not set socket flags"; -} - -} // namespace - -int RunServer() { - Store::Params params; - params["path-info-cache-size"] = "0"; - auto store = openStore(settings.storeUri, params); - auto worker = NewWorkerService(*store); - ServerBuilder builder; - builder.RegisterService(worker); - - auto n_fds = sd_listen_fds(0); - - if (n_fds > 1) { - LOG(FATAL) << "Too many file descriptors (" << n_fds - << ") received from systemd socket activation"; - } - - std::filesystem::path socket_path; - - if (n_fds == 0) { - socket_path = settings.nixDaemonSocketFile; - std::filesystem::create_directories(socket_path.parent_path()); - auto socket_addr = absl::StrFormat("unix://%s", socket_path); - builder.AddListeningPort(socket_addr, grpc::InsecureServerCredentials()); - } - - std::unique_ptr<Server> server(builder.BuildAndStart()); - - if (!server) { - LOG(FATAL) << "Error building server"; - return 1; - } - - // We have been systemd socket-activated - instead of asking grpc to make the - // socket path for us, start our own accept loop and pass file descriptors to - // grpc. - // - // This approach was *somewhat* adapted from - // https://gist.github.com/yorickvP/8d523a4df2b10c5812fa7789e82b7c1b - at some - // point we'd like gRPC to do it for us, though - see - // https://github.com/grpc/grpc/issues/19133 - if (n_fds == 1) { - int socket_fd = SD_LISTEN_FDS_START; - // Only used for logging - socket_path = readLink(absl::StrFormat("/proc/self/fd/%d", socket_fd)); - - PCHECK(sd_notify(0, "READY=1") == 0) << "Error notifying systemd"; - for (;;) { - try { - struct sockaddr_un remote_addr {}; - socklen_t remote_addr_len = sizeof(remote_addr); - int remote_fd = - accept(socket_fd, - reinterpret_cast<struct sockaddr*>(&remote_addr), // NOLINT - &remote_addr_len); - checkInterrupt(); - if (!remote_fd) { - if (errno == EINTR) { - continue; - } - PCHECK(false) << "error accepting connection"; - } - - LOG(INFO) << "Accepted remote connection on fd " << remote_fd; - SetNonBlocking(remote_fd); - grpc::AddInsecureChannelFromFd(server.get(), remote_fd); - } catch (Interrupted& e) { - return -1; - } catch (Error& e) { - LOG(ERROR) << "error processing connection: " << e.msg(); - } - } - } - - LOG(INFO) << "Nix daemon listening at " << socket_path; - server->Wait(); - return 0; -} - -} // namespace nix::daemon - -int main(int argc, char** argv) { // NOLINT - FLAGS_logtostderr = true; - google::InitGoogleLogging(argv[0]); // NOLINT - - absl::SetFlagsUsageConfig({.version_string = [] { return nix::nixVersion; }}); - absl::ParseCommandLine(argc, argv); - - if (absl::GetFlag(FLAGS_pipe)) { - if (nix::getStoreType() == nix::tDaemon) { - return nix::daemon::ForwardToSocket(nix::settings.nixDaemonSocketFile); - } else { - // TODO(grfn): Need to launch a server on stdin here - upstream calls - // processConnection(true, "root", 0); - LOG(ERROR) << "not implemented"; - return 1; - } - } - - return nix::daemon::RunServer(); -} |