forked from lix-project/lix
eldritch horrors
3e428f2289
these are copies of copyNAR with only some variables renamed.
Change-Id: I98ddd7a98250fa5d304e18e1debf417e9f7768dd
1112 lines
38 KiB
C++
1112 lines
38 KiB
C++
#include "daemon.hh"
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#include "monitor-fd.hh"
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#include "worker-protocol.hh"
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#include "worker-protocol-impl.hh"
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#include "build-result.hh"
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#include "store-api.hh"
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#include "store-cast.hh"
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#include "gc-store.hh"
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#include "log-store.hh"
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#include "indirect-root-store.hh"
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#include "path-with-outputs.hh"
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#include "finally.hh"
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#include "archive.hh"
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#include "derivations.hh"
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#include "args.hh"
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namespace nix::daemon {
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Sink & operator << (Sink & sink, const Logger::Fields & fields)
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{
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sink << fields.size();
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for (auto & f : fields) {
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sink << f.type;
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if (f.type == Logger::Field::tInt)
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sink << f.i;
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else if (f.type == Logger::Field::tString)
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sink << f.s;
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else abort();
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}
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return sink;
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}
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/* Logger that forwards log messages to the client, *if* we're in a
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state where the protocol allows it (i.e., when canSendStderr is
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true). */
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struct TunnelLogger : public Logger
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{
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FdSink & to;
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struct State
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{
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bool canSendStderr = false;
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std::vector<std::string> pendingMsgs;
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};
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Sync<State> state_;
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WorkerProto::Version clientVersion;
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TunnelLogger(FdSink & to, WorkerProto::Version clientVersion)
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: to(to), clientVersion(clientVersion) { }
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void enqueueMsg(const std::string & s)
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{
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auto state(state_.lock());
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if (state->canSendStderr) {
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assert(state->pendingMsgs.empty());
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try {
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to(s);
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to.flush();
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} catch (...) {
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/* Write failed; that means that the other side is
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gone. */
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state->canSendStderr = false;
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throw;
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}
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} else
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state->pendingMsgs.push_back(s);
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}
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void log(Verbosity lvl, std::string_view s) override
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{
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if (lvl > verbosity) return;
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StringSink buf;
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buf << STDERR_NEXT << (s + "\n");
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enqueueMsg(buf.s);
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}
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void logEI(const ErrorInfo & ei) override
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{
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if (ei.level > verbosity) return;
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std::stringstream oss;
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showErrorInfo(oss, ei, false);
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StringSink buf;
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buf << STDERR_NEXT << oss.str();
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enqueueMsg(buf.s);
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}
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/* startWork() means that we're starting an operation for which we
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want to send out stderr to the client. */
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void startWork()
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{
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auto state(state_.lock());
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state->canSendStderr = true;
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for (auto & msg : state->pendingMsgs)
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to(msg);
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state->pendingMsgs.clear();
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to.flush();
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}
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/* stopWork() means that we're done; stop sending stderr to the
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client. */
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void stopWork(const Error * ex = nullptr)
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{
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auto state(state_.lock());
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state->canSendStderr = false;
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if (!ex)
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to << STDERR_LAST;
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else {
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if (GET_PROTOCOL_MINOR(clientVersion) >= 26) {
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to << STDERR_ERROR << *ex;
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} else {
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to << STDERR_ERROR << ex->what() << ex->info().status;
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}
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}
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}
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void startActivity(ActivityId act, Verbosity lvl, ActivityType type,
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const std::string & s, const Fields & fields, ActivityId parent) override
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{
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if (GET_PROTOCOL_MINOR(clientVersion) < 20) {
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if (!s.empty())
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log(lvl, s + "...");
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return;
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}
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StringSink buf;
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buf << STDERR_START_ACTIVITY << act << lvl << type << s << fields << parent;
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enqueueMsg(buf.s);
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}
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void stopActivity(ActivityId act) override
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{
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if (GET_PROTOCOL_MINOR(clientVersion) < 20) return;
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StringSink buf;
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buf << STDERR_STOP_ACTIVITY << act;
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enqueueMsg(buf.s);
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}
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void result(ActivityId act, ResultType type, const Fields & fields) override
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{
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if (GET_PROTOCOL_MINOR(clientVersion) < 20) return;
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StringSink buf;
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buf << STDERR_RESULT << act << type << fields;
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enqueueMsg(buf.s);
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}
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};
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struct TunnelSink : Sink
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{
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Sink & to;
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TunnelSink(Sink & to) : to(to) { }
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void operator () (std::string_view data)
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{
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to << STDERR_WRITE;
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writeString(data, to);
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}
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};
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struct TunnelSource : BufferedSource
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{
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Source & from;
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BufferedSink & to;
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TunnelSource(Source & from, BufferedSink & to) : from(from), to(to) { }
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size_t readUnbuffered(char * data, size_t len) override
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{
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to << STDERR_READ << len;
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to.flush();
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size_t n = readString(data, len, from);
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if (n == 0) throw EndOfFile("unexpected end-of-file");
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return n;
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}
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};
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struct ClientSettings
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{
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bool keepFailed;
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bool keepGoing;
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bool tryFallback;
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Verbosity verbosity;
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unsigned int maxBuildJobs;
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time_t maxSilentTime;
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bool verboseBuild;
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unsigned int buildCores;
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bool useSubstitutes;
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StringMap overrides;
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void apply(TrustedFlag trusted)
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{
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settings.keepFailed = keepFailed;
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settings.keepGoing = keepGoing;
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settings.tryFallback = tryFallback;
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nix::verbosity = verbosity;
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settings.maxBuildJobs.assign(maxBuildJobs);
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settings.maxSilentTime = maxSilentTime;
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settings.verboseBuild = verboseBuild;
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settings.buildCores = buildCores;
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settings.useSubstitutes = useSubstitutes;
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for (auto & i : overrides) {
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auto & name(i.first);
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auto & value(i.second);
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auto setSubstituters = [&](Setting<Strings> & res) {
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if (name != res.name && res.aliases.count(name) == 0)
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return false;
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StringSet trusted = settings.trustedSubstituters;
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for (auto & s : settings.substituters.get())
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trusted.insert(s);
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Strings subs;
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auto ss = tokenizeString<Strings>(value);
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for (auto & s : ss)
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if (trusted.count(s))
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subs.push_back(s);
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else if (!s.ends_with("/") && trusted.count(s + "/"))
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subs.push_back(s + "/");
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else
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warn("ignoring untrusted substituter '%s', you are not a trusted user.\n"
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"Run `man nix.conf` for more information on the `substituters` configuration option.", s);
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res = subs;
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return true;
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};
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try {
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if (name == "ssh-auth-sock") // obsolete
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;
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else if (name == experimentalFeatureSettings.experimentalFeatures.name) {
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// We don’t want to forward the experimental features to
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// the daemon, as that could cause some pretty weird stuff
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if (parseFeatures(tokenizeString<StringSet>(value)) != experimentalFeatureSettings.experimentalFeatures.get())
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debug("Ignoring the client-specified experimental features");
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} else if (name == settings.pluginFiles.name) {
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if (tokenizeString<Paths>(value) != settings.pluginFiles.get())
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warn("Ignoring the client-specified plugin-files.\n"
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"The client specifying plugins to the daemon never made sense, and was removed in Nix >=2.14.");
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}
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else if (trusted
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|| name == settings.buildTimeout.name
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|| name == settings.maxSilentTime.name
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|| name == settings.pollInterval.name
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|| name == "connect-timeout"
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|| (name == "builders" && value == ""))
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settings.set(name, value);
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else if (setSubstituters(settings.substituters))
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;
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else
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debug("ignoring the client-specified setting '%s', because it is a restricted setting and you are not a trusted user", name);
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} catch (UsageError & e) {
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warn(e.what());
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}
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}
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}
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};
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static void performOp(TunnelLogger * logger, ref<Store> store,
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TrustedFlag trusted, RecursiveFlag recursive, WorkerProto::Version clientVersion,
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Source & from, BufferedSink & to, WorkerProto::Op op)
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{
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WorkerProto::ReadConn rconn {
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.from = from,
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.version = clientVersion,
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};
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WorkerProto::WriteConn wconn {
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.to = to,
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.version = clientVersion,
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};
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switch (op) {
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case WorkerProto::Op::IsValidPath: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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bool result = store->isValidPath(path);
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logger->stopWork();
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to << result;
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break;
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}
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case WorkerProto::Op::QueryValidPaths: {
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auto paths = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
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SubstituteFlag substitute = NoSubstitute;
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if (GET_PROTOCOL_MINOR(clientVersion) >= 27) {
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substitute = readInt(from) ? Substitute : NoSubstitute;
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}
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logger->startWork();
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if (substitute) {
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store->substitutePaths(paths);
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}
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auto res = store->queryValidPaths(paths, substitute);
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logger->stopWork();
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WorkerProto::write(*store, wconn, res);
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break;
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}
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case WorkerProto::Op::HasSubstitutes: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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StorePathSet paths; // FIXME
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paths.insert(path);
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auto res = store->querySubstitutablePaths(paths);
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logger->stopWork();
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to << (res.count(path) != 0);
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break;
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}
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case WorkerProto::Op::QuerySubstitutablePaths: {
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auto paths = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
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logger->startWork();
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auto res = store->querySubstitutablePaths(paths);
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logger->stopWork();
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WorkerProto::write(*store, wconn, res);
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break;
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}
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case WorkerProto::Op::QueryPathHash: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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auto hash = store->queryPathInfo(path)->narHash;
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logger->stopWork();
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to << hash.to_string(Base16, false);
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break;
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}
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case WorkerProto::Op::QueryReferences:
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case WorkerProto::Op::QueryReferrers:
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case WorkerProto::Op::QueryValidDerivers:
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case WorkerProto::Op::QueryDerivationOutputs: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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StorePathSet paths;
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if (op == WorkerProto::Op::QueryReferences)
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for (auto & i : store->queryPathInfo(path)->references)
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paths.insert(i);
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else if (op == WorkerProto::Op::QueryReferrers)
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store->queryReferrers(path, paths);
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else if (op == WorkerProto::Op::QueryValidDerivers)
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paths = store->queryValidDerivers(path);
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else paths = store->queryDerivationOutputs(path);
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logger->stopWork();
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WorkerProto::write(*store, wconn, paths);
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break;
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}
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case WorkerProto::Op::QueryDerivationOutputNames: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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auto names = store->readDerivation(path).outputNames();
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logger->stopWork();
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to << names;
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break;
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}
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case WorkerProto::Op::QueryDerivationOutputMap: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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auto outputs = store->queryPartialDerivationOutputMap(path);
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logger->stopWork();
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WorkerProto::write(*store, wconn, outputs);
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break;
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}
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case WorkerProto::Op::QueryDeriver: {
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auto path = store->parseStorePath(readString(from));
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logger->startWork();
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auto info = store->queryPathInfo(path);
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logger->stopWork();
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to << (info->deriver ? store->printStorePath(*info->deriver) : "");
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break;
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}
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case WorkerProto::Op::QueryPathFromHashPart: {
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auto hashPart = readString(from);
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logger->startWork();
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auto path = store->queryPathFromHashPart(hashPart);
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logger->stopWork();
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to << (path ? store->printStorePath(*path) : "");
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break;
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}
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case WorkerProto::Op::AddToStore: {
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if (GET_PROTOCOL_MINOR(clientVersion) >= 25) {
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auto name = readString(from);
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auto camStr = readString(from);
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auto refs = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
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bool repairBool;
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from >> repairBool;
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auto repair = RepairFlag{repairBool};
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logger->startWork();
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auto pathInfo = [&]() {
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// NB: FramedSource must be out of scope before logger->stopWork();
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auto [contentAddressMethod, hashType_] = ContentAddressMethod::parse(camStr);
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auto hashType = hashType_; // work around clang bug
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FramedSource source(from);
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// TODO this is essentially RemoteStore::addCAToStore. Move it up to Store.
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return std::visit(overloaded {
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[&](const TextIngestionMethod &) {
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if (hashType != htSHA256)
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throw UnimplementedError("When adding text-hashed data called '%s', only SHA-256 is supported but '%s' was given",
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name, printHashType(hashType));
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// We could stream this by changing Store
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std::string contents = source.drain();
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auto path = store->addTextToStore(name, contents, refs, repair);
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return store->queryPathInfo(path);
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},
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[&](const FileIngestionMethod & fim) {
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auto path = store->addToStoreFromDump(source, name, fim, hashType, repair, refs);
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return store->queryPathInfo(path);
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},
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}, contentAddressMethod.raw);
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}();
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logger->stopWork();
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WorkerProto::Serialise<ValidPathInfo>::write(*store, wconn, *pathInfo);
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} else {
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HashType hashAlgo;
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std::string baseName;
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FileIngestionMethod method;
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{
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bool fixed;
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uint8_t recursive;
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std::string hashAlgoRaw;
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from >> baseName >> fixed /* obsolete */ >> recursive >> hashAlgoRaw;
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if (recursive > (uint8_t) FileIngestionMethod::Recursive)
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throw Error("unsupported FileIngestionMethod with value of %i; you may need to upgrade nix-daemon", recursive);
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method = FileIngestionMethod { recursive };
|
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/* Compatibility hack. */
|
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if (!fixed) {
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hashAlgoRaw = "sha256";
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method = FileIngestionMethod::Recursive;
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}
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hashAlgo = parseHashType(hashAlgoRaw);
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}
|
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|
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auto dumpSource = sinkToSource([&](Sink & saved) {
|
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if (method == FileIngestionMethod::Recursive) {
|
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/* We parse the NAR dump through into `saved` unmodified,
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so why all this extra work? We still parse the NAR so
|
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that we aren't sending arbitrary data to `saved`
|
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unwittingly`, and we know when the NAR ends so we don't
|
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consume the rest of `from` and can't parse another
|
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command. (We don't trust `addToStoreFromDump` to not
|
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eagerly consume the entire stream it's given, past the
|
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length of the Nar. */
|
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copyNAR(from, saved);
|
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} else {
|
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/* Incrementally parse the NAR file, stripping the
|
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metadata, and streaming the sole file we expect into
|
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`saved`. */
|
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RetrieveRegularNARSink savedRegular { saved };
|
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parseDump(savedRegular, from);
|
||
if (!savedRegular.regular) throw Error("regular file expected");
|
||
}
|
||
});
|
||
logger->startWork();
|
||
auto path = store->addToStoreFromDump(*dumpSource, baseName, method, hashAlgo);
|
||
logger->stopWork();
|
||
|
||
to << store->printStorePath(path);
|
||
}
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddMultipleToStore: {
|
||
bool repair, dontCheckSigs;
|
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from >> repair >> dontCheckSigs;
|
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if (!trusted && dontCheckSigs)
|
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dontCheckSigs = false;
|
||
|
||
logger->startWork();
|
||
{
|
||
FramedSource source(from);
|
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store->addMultipleToStore(source,
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RepairFlag{repair},
|
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dontCheckSigs ? NoCheckSigs : CheckSigs);
|
||
}
|
||
logger->stopWork();
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddTextToStore: {
|
||
std::string suffix = readString(from);
|
||
std::string s = readString(from);
|
||
auto refs = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
|
||
logger->startWork();
|
||
auto path = store->addTextToStore(suffix, s, refs, NoRepair);
|
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logger->stopWork();
|
||
to << store->printStorePath(path);
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::ExportPath: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
readInt(from); // obsolete
|
||
logger->startWork();
|
||
TunnelSink sink(to);
|
||
store->exportPath(path, sink);
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::ImportPaths: {
|
||
logger->startWork();
|
||
TunnelSource source(from, to);
|
||
auto paths = store->importPaths(source,
|
||
trusted ? NoCheckSigs : CheckSigs);
|
||
logger->stopWork();
|
||
Strings paths2;
|
||
for (auto & i : paths) paths2.push_back(store->printStorePath(i));
|
||
to << paths2;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::BuildPaths: {
|
||
auto drvs = WorkerProto::Serialise<DerivedPaths>::read(*store, rconn);
|
||
BuildMode mode = bmNormal;
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 15) {
|
||
mode = (BuildMode) readInt(from);
|
||
|
||
/* Repairing is not atomic, so disallowed for "untrusted"
|
||
clients.
|
||
|
||
FIXME: layer violation in this message: the daemon code (i.e.
|
||
this file) knows whether a client/connection is trusted, but it
|
||
does not how how the client was authenticated. The mechanism
|
||
need not be getting the UID of the other end of a Unix Domain
|
||
Socket.
|
||
*/
|
||
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 WorkerProto::Op::BuildPathsWithResults: {
|
||
auto drvs = WorkerProto::Serialise<DerivedPaths>::read(*store, rconn);
|
||
BuildMode mode = bmNormal;
|
||
mode = (BuildMode) readInt(from);
|
||
|
||
/* Repairing is not atomic, so disallowed for "untrusted"
|
||
clients.
|
||
|
||
FIXME: layer violation; see above. */
|
||
if (mode == bmRepair && !trusted)
|
||
throw Error("repairing is not allowed because you are not in 'trusted-users'");
|
||
|
||
logger->startWork();
|
||
auto results = store->buildPathsWithResults(drvs, mode);
|
||
logger->stopWork();
|
||
|
||
WorkerProto::write(*store, wconn, results);
|
||
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::BuildDerivation: {
|
||
auto drvPath = store->parseStorePath(readString(from));
|
||
BasicDerivation drv;
|
||
/*
|
||
* Note: unlike wopEnsurePath, this operation reads a
|
||
* derivation-to-be-realized from the client with
|
||
* readDerivation(Source,Store) rather than reading it from
|
||
* the local store with Store::readDerivation(). Since the
|
||
* derivation-to-be-realized is not registered in the store
|
||
* it cannot be trusted that its outPath was calculated
|
||
* correctly.
|
||
*/
|
||
readDerivation(from, *store, drv, Derivation::nameFromPath(drvPath));
|
||
BuildMode buildMode = (BuildMode) readInt(from);
|
||
logger->startWork();
|
||
|
||
auto drvType = drv.type();
|
||
|
||
/* Content-addressed derivations are trustless because their output paths
|
||
are verified by their content alone, so any derivation is free to
|
||
try to produce such a path.
|
||
|
||
Input-addressed derivation output paths, however, are calculated
|
||
from the derivation closure that produced them---even knowing the
|
||
root derivation is not enough. That the output data actually came
|
||
from those derivations is fundamentally unverifiable, but the daemon
|
||
trusts itself on that matter. The question instead is whether the
|
||
submitted plan has rights to the output paths it wants to fill, and
|
||
at least the derivation closure proves that.
|
||
|
||
It would have been nice if input-address algorithm merely depended
|
||
on the build time closure, rather than depending on the derivation
|
||
closure. That would mean input-addressed paths used at build time
|
||
would just be trusted and not need their own evidence. This is in
|
||
fact fine as the same guarantees would hold *inductively*: either
|
||
the remote builder has those paths and already trusts them, or it
|
||
needs to build them too and thus their evidence must be provided in
|
||
turn. The advantage of this variant algorithm is that the evidence
|
||
for input-addressed paths which the remote builder already has
|
||
doesn't need to be sent again.
|
||
|
||
That said, now that we have floating CA derivations, it is better
|
||
that people just migrate to those which also solve this problem, and
|
||
others. It's the same migration difficulty with strictly more
|
||
benefit.
|
||
|
||
Lastly, do note that when we parse fixed-output content-addressed
|
||
derivations, we throw out the precomputed output paths and just
|
||
store the hashes, so there aren't two competing sources of truth an
|
||
attacker could exploit. */
|
||
if (!(drvType.isCA() || trusted))
|
||
throw Error("you are not privileged to build input-addressed derivations");
|
||
|
||
/* Make sure that the non-input-addressed derivations that got this far
|
||
are in fact content-addressed if we don't trust them. */
|
||
assert(drvType.isCA() || trusted);
|
||
|
||
/* Recompute the derivation path when we cannot trust the original. */
|
||
if (!trusted) {
|
||
/* Recomputing the derivation path for input-address derivations
|
||
makes it harder to audit them after the fact, since we need the
|
||
original not-necessarily-resolved derivation to verify the drv
|
||
derivation as adequate claim to the input-addressed output
|
||
paths. */
|
||
assert(drvType.isCA());
|
||
|
||
Derivation drv2;
|
||
static_cast<BasicDerivation &>(drv2) = drv;
|
||
drvPath = writeDerivation(*store, Derivation { drv2 });
|
||
}
|
||
|
||
auto res = store->buildDerivation(drvPath, drv, buildMode);
|
||
logger->stopWork();
|
||
WorkerProto::write(*store, wconn, res);
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::EnsurePath: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
logger->startWork();
|
||
store->ensurePath(path);
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddTempRoot: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
logger->startWork();
|
||
store->addTempRoot(path);
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddIndirectRoot: {
|
||
Path path = absPath(readString(from));
|
||
|
||
logger->startWork();
|
||
auto & indirectRootStore = require<IndirectRootStore>(*store);
|
||
indirectRootStore.addIndirectRoot(path);
|
||
logger->stopWork();
|
||
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
// Obsolete.
|
||
case WorkerProto::Op::SyncWithGC: {
|
||
logger->startWork();
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::FindRoots: {
|
||
logger->startWork();
|
||
auto & gcStore = require<GcStore>(*store);
|
||
Roots roots = gcStore.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 << store->printStorePath(target);
|
||
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::CollectGarbage: {
|
||
GCOptions options;
|
||
options.action = (GCOptions::GCAction) readInt(from);
|
||
options.pathsToDelete = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
|
||
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");
|
||
auto & gcStore = require<GcStore>(*store);
|
||
gcStore.collectGarbage(options, results);
|
||
logger->stopWork();
|
||
|
||
to << results.paths << results.bytesFreed << 0 /* obsolete */;
|
||
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::SetOptions: {
|
||
|
||
ClientSettings clientSettings;
|
||
|
||
clientSettings.keepFailed = readInt(from);
|
||
clientSettings.keepGoing = readInt(from);
|
||
clientSettings.tryFallback = readInt(from);
|
||
clientSettings.verbosity = (Verbosity) readInt(from);
|
||
clientSettings.maxBuildJobs = readInt(from);
|
||
clientSettings.maxSilentTime = readInt(from);
|
||
readInt(from); // obsolete useBuildHook
|
||
clientSettings.verboseBuild = lvlError == (Verbosity) readInt(from);
|
||
readInt(from); // obsolete logType
|
||
readInt(from); // obsolete printBuildTrace
|
||
clientSettings.buildCores = readInt(from);
|
||
clientSettings.useSubstitutes = readInt(from);
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 12) {
|
||
unsigned int n = readInt(from);
|
||
for (unsigned int i = 0; i < n; i++) {
|
||
auto name = readString(from);
|
||
auto value = readString(from);
|
||
clientSettings.overrides.emplace(name, value);
|
||
}
|
||
}
|
||
|
||
logger->startWork();
|
||
|
||
// FIXME: use some setting in recursive mode. Will need to use
|
||
// non-global variables.
|
||
if (!recursive)
|
||
clientSettings.apply(trusted);
|
||
|
||
logger->stopWork();
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QuerySubstitutablePathInfo: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
logger->startWork();
|
||
SubstitutablePathInfos infos;
|
||
store->querySubstitutablePathInfos({{path, std::nullopt}}, infos);
|
||
logger->stopWork();
|
||
auto i = infos.find(path);
|
||
if (i == infos.end())
|
||
to << 0;
|
||
else {
|
||
to << 1
|
||
<< (i->second.deriver ? store->printStorePath(*i->second.deriver) : "");
|
||
WorkerProto::write(*store, wconn, i->second.references);
|
||
to << i->second.downloadSize
|
||
<< i->second.narSize;
|
||
}
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QuerySubstitutablePathInfos: {
|
||
SubstitutablePathInfos infos;
|
||
StorePathCAMap pathsMap = {};
|
||
if (GET_PROTOCOL_MINOR(clientVersion) < 22) {
|
||
auto paths = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
|
||
for (auto & path : paths)
|
||
pathsMap.emplace(path, std::nullopt);
|
||
} else
|
||
pathsMap = WorkerProto::Serialise<StorePathCAMap>::read(*store, rconn);
|
||
logger->startWork();
|
||
store->querySubstitutablePathInfos(pathsMap, infos);
|
||
logger->stopWork();
|
||
to << infos.size();
|
||
for (auto & i : infos) {
|
||
to << store->printStorePath(i.first)
|
||
<< (i.second.deriver ? store->printStorePath(*i.second.deriver) : "");
|
||
WorkerProto::write(*store, wconn, i.second.references);
|
||
to << i.second.downloadSize << i.second.narSize;
|
||
}
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QueryAllValidPaths: {
|
||
logger->startWork();
|
||
auto paths = store->queryAllValidPaths();
|
||
logger->stopWork();
|
||
WorkerProto::write(*store, wconn, paths);
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QueryPathInfo: {
|
||
auto path = store->parseStorePath(readString(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;
|
||
WorkerProto::write(*store, wconn, static_cast<const UnkeyedValidPathInfo &>(*info));
|
||
} else {
|
||
assert(GET_PROTOCOL_MINOR(clientVersion) >= 17);
|
||
to << 0;
|
||
}
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::OptimiseStore:
|
||
logger->startWork();
|
||
store->optimiseStore();
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
|
||
case WorkerProto::Op::VerifyStore: {
|
||
bool checkContents, 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 << errors;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddSignatures: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
StringSet sigs = readStrings<StringSet>(from);
|
||
logger->startWork();
|
||
store->addSignatures(path, sigs);
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::NarFromPath: {
|
||
auto path = store->parseStorePath(readString(from));
|
||
logger->startWork();
|
||
logger->stopWork();
|
||
dumpPath(store->toRealPath(path), to);
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddToStoreNar: {
|
||
bool repair, dontCheckSigs;
|
||
auto path = store->parseStorePath(readString(from));
|
||
auto deriver = readString(from);
|
||
auto narHash = Hash::parseAny(readString(from), htSHA256);
|
||
ValidPathInfo info { path, narHash };
|
||
if (deriver != "")
|
||
info.deriver = store->parseStorePath(deriver);
|
||
info.references = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
|
||
from >> info.registrationTime >> info.narSize >> info.ultimate;
|
||
info.sigs = readStrings<StringSet>(from);
|
||
info.ca = ContentAddress::parseOpt(readString(from));
|
||
from >> repair >> dontCheckSigs;
|
||
if (!trusted && dontCheckSigs)
|
||
dontCheckSigs = false;
|
||
if (!trusted)
|
||
info.ultimate = false;
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 23) {
|
||
logger->startWork();
|
||
{
|
||
FramedSource source(from);
|
||
store->addToStore(info, source, (RepairFlag) repair,
|
||
dontCheckSigs ? NoCheckSigs : CheckSigs);
|
||
}
|
||
logger->stopWork();
|
||
}
|
||
|
||
else {
|
||
std::unique_ptr<Source> source;
|
||
StringSink saved;
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 21)
|
||
source = std::make_unique<TunnelSource>(from, to);
|
||
else {
|
||
copyNAR(from, saved);
|
||
source = std::make_unique<StringSource>(saved.s);
|
||
}
|
||
|
||
logger->startWork();
|
||
|
||
// FIXME: race if addToStore doesn't read source?
|
||
store->addToStore(info, *source, (RepairFlag) repair,
|
||
dontCheckSigs ? NoCheckSigs : CheckSigs);
|
||
|
||
logger->stopWork();
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QueryMissing: {
|
||
auto targets = WorkerProto::Serialise<DerivedPaths>::read(*store, rconn);
|
||
logger->startWork();
|
||
StorePathSet willBuild, willSubstitute, unknown;
|
||
uint64_t downloadSize, narSize;
|
||
store->queryMissing(targets, willBuild, willSubstitute, unknown, downloadSize, narSize);
|
||
logger->stopWork();
|
||
WorkerProto::write(*store, wconn, willBuild);
|
||
WorkerProto::write(*store, wconn, willSubstitute);
|
||
WorkerProto::write(*store, wconn, unknown);
|
||
to << downloadSize << narSize;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::RegisterDrvOutput: {
|
||
logger->startWork();
|
||
if (GET_PROTOCOL_MINOR(clientVersion) < 31) {
|
||
auto outputId = DrvOutput::parse(readString(from));
|
||
auto outputPath = StorePath(readString(from));
|
||
store->registerDrvOutput(Realisation{
|
||
.id = outputId, .outPath = outputPath});
|
||
} else {
|
||
auto realisation = WorkerProto::Serialise<Realisation>::read(*store, rconn);
|
||
store->registerDrvOutput(realisation);
|
||
}
|
||
logger->stopWork();
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QueryRealisation: {
|
||
logger->startWork();
|
||
auto outputId = DrvOutput::parse(readString(from));
|
||
auto info = store->queryRealisation(outputId);
|
||
logger->stopWork();
|
||
if (GET_PROTOCOL_MINOR(clientVersion) < 31) {
|
||
std::set<StorePath> outPaths;
|
||
if (info) outPaths.insert(info->outPath);
|
||
WorkerProto::write(*store, wconn, outPaths);
|
||
} else {
|
||
std::set<Realisation> realisations;
|
||
if (info) realisations.insert(*info);
|
||
WorkerProto::write(*store, wconn, realisations);
|
||
}
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::AddBuildLog: {
|
||
StorePath path{readString(from)};
|
||
logger->startWork();
|
||
if (!trusted)
|
||
throw Error("you are not privileged to add logs");
|
||
auto & logStore = require<LogStore>(*store);
|
||
{
|
||
FramedSource source(from);
|
||
StringSink sink;
|
||
source.drainInto(sink);
|
||
logStore.addBuildLog(path, sink.s);
|
||
}
|
||
logger->stopWork();
|
||
to << 1;
|
||
break;
|
||
}
|
||
|
||
case WorkerProto::Op::QueryFailedPaths:
|
||
case WorkerProto::Op::ClearFailedPaths:
|
||
throw Error("Removed operation %1%", op);
|
||
|
||
default:
|
||
throw Error("invalid operation %1%", op);
|
||
}
|
||
}
|
||
|
||
void processConnection(
|
||
ref<Store> store,
|
||
FdSource & from,
|
||
FdSink & to,
|
||
TrustedFlag trusted,
|
||
RecursiveFlag recursive)
|
||
{
|
||
auto monitor = !recursive ? std::make_unique<MonitorFdHup>(from.fd) : nullptr;
|
||
|
||
/* 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();
|
||
WorkerProto::Version clientVersion = readInt(from);
|
||
|
||
if (clientVersion < 0x10a)
|
||
throw Error("the Nix client version is too old");
|
||
|
||
auto tunnelLogger = new TunnelLogger(to, clientVersion);
|
||
auto prevLogger = nix::logger;
|
||
// FIXME
|
||
if (!recursive)
|
||
logger = tunnelLogger;
|
||
|
||
unsigned int opCount = 0;
|
||
|
||
Finally finally([&]() {
|
||
_isInterrupted = false;
|
||
printMsgUsing(prevLogger, lvlDebug, "%d operations", opCount);
|
||
});
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 14 && readInt(from)) {
|
||
// Obsolete CPU affinity.
|
||
readInt(from);
|
||
}
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 11)
|
||
readInt(from); // obsolete reserveSpace
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 33)
|
||
to << nixVersion;
|
||
|
||
if (GET_PROTOCOL_MINOR(clientVersion) >= 35) {
|
||
// We and the underlying store both need to trust the client for
|
||
// it to be trusted.
|
||
auto temp = trusted
|
||
? store->isTrustedClient()
|
||
: std::optional { NotTrusted };
|
||
WorkerProto::WriteConn wconn {
|
||
.to = to,
|
||
.version = clientVersion,
|
||
};
|
||
WorkerProto::write(*store, wconn, temp);
|
||
}
|
||
|
||
/* Send startup error messages to the client. */
|
||
tunnelLogger->startWork();
|
||
|
||
try {
|
||
|
||
tunnelLogger->stopWork();
|
||
to.flush();
|
||
|
||
/* Process client requests. */
|
||
while (true) {
|
||
WorkerProto::Op op;
|
||
try {
|
||
op = (enum WorkerProto::Op) readInt(from);
|
||
} catch (Interrupted & e) {
|
||
break;
|
||
} catch (EndOfFile & e) {
|
||
break;
|
||
}
|
||
|
||
printMsgUsing(prevLogger, lvlDebug, "received daemon op %d", op);
|
||
|
||
opCount++;
|
||
|
||
debug("performing daemon worker op: %d", op);
|
||
|
||
try {
|
||
performOp(tunnelLogger, store, trusted, recursive, 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(&e);
|
||
if (!errorAllowed) throw;
|
||
} catch (std::bad_alloc & e) {
|
||
auto ex = Error("Lix daemon out of memory");
|
||
tunnelLogger->stopWork(&ex);
|
||
throw;
|
||
}
|
||
|
||
to.flush();
|
||
|
||
assert(!tunnelLogger->state_.lock()->canSendStderr);
|
||
};
|
||
|
||
} catch (Error & e) {
|
||
tunnelLogger->stopWork(&e);
|
||
to.flush();
|
||
return;
|
||
} catch (std::exception & e) {
|
||
auto ex = Error(e.what());
|
||
tunnelLogger->stopWork(&ex);
|
||
to.flush();
|
||
return;
|
||
}
|
||
}
|
||
|
||
}
|