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Enable socket-only daemon operations without filesystem access

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Allows the Nix daemon to serve store paths purely over Unix domain
sockets without requiring the client to have filesystem access to
the store directory. This can be useful for VM setups where the host
serves paths to the guest via socket.

Tests verify socket-only operations work for copying, substitution,
and remote building (tested on Linux), with both local and binary cache stores.
This commit is contained in:
Robert Hensing 2025-11-04 16:32:17 +01:00
parent 341c42f321
commit 6a017a2a87
6 changed files with 174 additions and 2 deletions
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2
src/libstore/daemon.cc
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@ -896,7 +896,7 @@ static void performOp(
auto path = WorkerProto::Serialise<StorePath>::read(*store, rconn);
logger->startWork();
logger->stopWork();
dumpPath(store->toRealPath(path), conn.to);
store->narFromPath(path, conn.to);
break;
}

2
src/libstore/include/nix/store/uds-remote-store.hh
View file

@ -68,7 +68,7 @@ struct UDSRemoteStore : virtual IndirectRootStore, virtual RemoteStore
void narFromPath(const StorePath & path, Sink & sink) override
{
Store::narFromPath(path, sink);
RemoteStore::narFromPath(path, sink);
}
/**