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libstore: remove operations that are never called by supported clients

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I did a whole bunch of `git log -S` to find out exactly when all these
things were obsoleted and found the commit in which their usage was
removed, which I have added in either the error message or a comment.

I've also made *some* of the version checks into static asserts for when
we update the minimum supported protocol version.

In the end this is not a lot of code we are deleting, but it's code that
we will never have to support into the future when we build a protocol
bridge, which is why I did it. It is not in the support baseline.

Change-Id: Iea3c80795c75ea74f328cf7ede7cbedf8c41926b
This commit is contained in:
jade 2024-06-17 22:13:24 -07:00
parent ce2b48aa41
commit 50472aa5be
4 changed files with 81 additions and 71 deletions
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115
src/libstore/daemon.cc
View file

@ -296,17 +296,6 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
break;
}
case WorkerProto::Op::HasSubstitutes: {
auto path = store->parseStorePath(readString(from));
logger->startWork();
StorePathSet paths; // FIXME
paths.insert(path);
auto res = store->querySubstitutablePaths(paths);
logger->stopWork();
to << (res.count(path) != 0);
break;
}
case WorkerProto::Op::QuerySubstitutablePaths: {
auto paths = WorkerProto::Serialise<StorePathSet>::read(*store, rconn);
logger->startWork();
@ -316,36 +305,74 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
break;
}
case WorkerProto::Op::QueryPathHash: {
auto path = store->parseStorePath(readString(from));
logger->startWork();
auto hash = store->queryPathInfo(path)->narHash;
logger->stopWork();
to << hash.to_string(Base16, false);
case WorkerProto::Op::HasSubstitutes: {
throw UnimplementedError("HasSubstitutes is not supported in Lix. This is not used if the declared server protocol is > 1.12 (Nix 1.0, 2012)");
break;
}
case WorkerProto::Op::QueryPathHash: {
throw UnimplementedError("QueryPathHash is not supported in Lix, client usages were removed in 2016 in e0204f8d462041387651af388074491fd0bf36d6");
break;
}
case WorkerProto::Op::QueryReferences: {
throw UnimplementedError("QueryReferences is not supported in Lix, client usages were removed in 2016 in e0204f8d462041387651af388074491fd0bf36d6");
break;
}
case WorkerProto::Op::QueryDeriver: {
throw UnimplementedError("QueryDeriver is not supported in Lix, client usages were removed in 2016 in e0204f8d462041387651af388074491fd0bf36d6");
break;
}
case WorkerProto::Op::ExportPath: {
throw UnimplementedError("ExportPath is not supported in Lix, client usage were removed in 2017 in 27dc76c1a5dbe654465245ff5f6bc22e2c8902da");
break;
}
case WorkerProto::Op::ImportPaths: {
throw UnimplementedError("ImportPaths is not supported in Lix. This is not used if the declared server protocol is >= 1.18 (Nix 2.0, 2016)");
break;
}
case WorkerProto::Op::QueryReferences:
case WorkerProto::Op::QueryReferrers:
case WorkerProto::Op::QueryValidDerivers:
case WorkerProto::Op::QueryDerivationOutputs: {
auto path = store->parseStorePath(readString(from));
logger->startWork();
StorePathSet paths;
if (op == WorkerProto::Op::QueryReferences)
for (auto & i : store->queryPathInfo(path)->references)
paths.insert(i);
else if (op == WorkerProto::Op::QueryReferrers)
store->queryReferrers(path, paths);
else if (op == WorkerProto::Op::QueryValidDerivers)
paths = store->queryValidDerivers(path);
else paths = store->queryDerivationOutputs(path);
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (op) {
case WorkerProto::Op::QueryReferrers: {
store->queryReferrers(path, paths);
break;
}
case WorkerProto::Op::QueryValidDerivers: {
paths = store->queryValidDerivers(path);
break;
}
case WorkerProto::Op::QueryDerivationOutputs: {
// Only sent if server presents proto version <= 1.21
REMOVE_AFTER_DROPPING_PROTO_MINOR(21);
paths = store->queryDerivationOutputs(path);
break;
}
default:
abort();
break;
}
#pragma GCC diagnostic pop
logger->stopWork();
WorkerProto::write(*store, wconn, paths);
break;
}
case WorkerProto::Op::QueryDerivationOutputNames: {
// Unused in CppNix >= 2.4 (removed in 045b07200c77bf1fe19c0a986aafb531e7e1ba54)
REMOVE_AFTER_DROPPING_PROTO_MINOR(31);
auto path = store->parseStorePath(readString(from));
logger->startWork();
auto names = store->readDerivation(path).outputNames();
@ -363,15 +390,6 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
break;
}
case WorkerProto::Op::QueryDeriver: {
auto path = store->parseStorePath(readString(from));
logger->startWork();
auto info = store->queryPathInfo(path);
logger->stopWork();
to << (info->deriver ? store->printStorePath(*info->deriver) : "");
break;
}
case WorkerProto::Op::QueryPathFromHashPart: {
auto hashPart = readString(from);
logger->startWork();
@ -493,29 +511,6 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
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 = buildModeFromInteger(readInt(from));
@ -666,8 +661,10 @@ static void performOp(TunnelLogger * logger, ref<Store> store,
break;
}
// Obsolete.
// Obsolete since 9947f1646a26b339fff2e02b77798e9841fac7f0 (included in CppNix 2.5.0).
case WorkerProto::Op::SyncWithGC: {
// CppNix 2.5.0 is 32
REMOVE_AFTER_DROPPING_PROTO_MINOR(31);
logger->startWork();
logger->stopWork();
to << 1;

4
src/libstore/remote-store.cc
View file

@ -307,6 +307,7 @@ StorePathSet RemoteStore::queryDerivationOutputs(const StorePath & path)
if (GET_PROTOCOL_MINOR(getProtocol()) >= 22) {
return Store::queryDerivationOutputs(path);
}
REMOVE_AFTER_DROPPING_PROTO_MINOR(21);
auto conn(getConnection());
conn->to << WorkerProto::Op::QueryDerivationOutputs << printStorePath(path);
conn.processStderr();
@ -336,6 +337,7 @@ std::map<std::string, std::optional<StorePath>> RemoteStore::queryPartialDerivat
return outputs;
}
} else {
REMOVE_AFTER_DROPPING_PROTO_MINOR(21);
auto & evalStore = evalStore_ ? *evalStore_ : *this;
// Fallback for old daemon versions.
// For floating-CA derivations (and their co-dependencies) this is an
@ -530,6 +532,7 @@ void RemoteStore::registerDrvOutput(const Realisation & info)
auto conn(getConnection());
conn->to << WorkerProto::Op::RegisterDrvOutput;
if (GET_PROTOCOL_MINOR(conn->daemonVersion) < 31) {
REMOVE_AFTER_DROPPING_PROTO_MINOR(30);
conn->to << info.id.to_string();
conn->to << std::string(info.outPath.to_string());
} else {
@ -617,6 +620,7 @@ std::vector<KeyedBuildResult> RemoteStore::buildPathsWithResults(
conn.processStderr();
return WorkerProto::Serialise<std::vector<KeyedBuildResult>>::read(*this, *conn);
} else {
REMOVE_AFTER_DROPPING_PROTO_MINOR(33);
// Avoid deadlock.
conn_.reset();

5
src/libstore/serve-protocol.hh
View file

@ -8,6 +8,11 @@ namespace nix {
#define SERVE_MAGIC_1 0x390c9deb
#define SERVE_MAGIC_2 0x5452eecb
// This must remain at 2.7 (Nix 2.18) forever in Lix, since the protocol
// versioning is monotonic, so if we ever change it in the future, it will
// break compatibility with any potential CppNix-originated protocol changes.
//
// Lix intends to replace this protocol entirely.
#define SERVE_PROTOCOL_VERSION (2 << 8 | 7)
#define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)

28
src/libstore/worker-protocol.hh
View file

@ -23,6 +23,10 @@ namespace nix {
#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)
#define REMOVE_AFTER_DROPPING_PROTO_MINOR(protoMinor) \
static_assert(MIN_SUPPORTED_MINOR_WORKER_PROTO_VERSION <= (protoMinor))
#define STDERR_NEXT 0x6f6c6d67
#define STDERR_READ 0x64617461 // data needed from source
#define STDERR_WRITE 0x64617416 // data for sink
@ -136,30 +140,30 @@ struct WorkerProto
enum struct WorkerProto::Op : uint64_t
{
IsValidPath = 1,
HasSubstitutes = 3,
QueryPathHash = 4, // obsolete
QueryReferences = 5, // obsolete
HasSubstitutes = 3, // obsolete since 2012, stubbed to error
QueryPathHash = 4, // obsolete since 2016, stubbed to error
QueryReferences = 5, // obsolete since 2016, stubbed to error
QueryReferrers = 6,
AddToStore = 7,
AddTextToStore = 8, // obsolete since 1.25, Nix 3.0. Use WorkerProto::Op::AddToStore
AddTextToStore = 8, // obsolete since protocol 1.25, CppNix 2.4. Use WorkerProto::Op::AddToStore
BuildPaths = 9,
EnsurePath = 10,
AddTempRoot = 11,
AddIndirectRoot = 12,
SyncWithGC = 13,
SyncWithGC = 13, // obsolete since CppNix 2.5.0
FindRoots = 14,
ExportPath = 16, // obsolete
QueryDeriver = 18, // obsolete
ExportPath = 16, // obsolete since 2017, stubbed to error
QueryDeriver = 18, // obsolete since 2016, stubbed to error
SetOptions = 19,
CollectGarbage = 20,
QuerySubstitutablePathInfo = 21,
QueryDerivationOutputs = 22, // obsolete
QueryDerivationOutputs = 22, // obsolete since protocol 1.21, CppNix 2.4
QueryAllValidPaths = 23,
QueryFailedPaths = 24,
ClearFailedPaths = 25,
QueryFailedPaths = 24, // obsolete, removed
ClearFailedPaths = 25, // obsolete, removed
QueryPathInfo = 26,
ImportPaths = 27, // obsolete
QueryDerivationOutputNames = 28, // obsolete
ImportPaths = 27, // obsolete since 2016
QueryDerivationOutputNames = 28, // obsolete since CppNix 2.4
QueryPathFromHashPart = 29,
QuerySubstitutablePathInfos = 30,
QueryValidPaths = 31,