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Merge pull request #4836 from NixOS/ca/track-drvoutput-dependencies-2-le-retour

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Track the dependencies of CA realisations
This commit is contained in:
Eelco Dolstra 2021-06-23 10:03:31 +02:00 committed by GitHub
parent 4b23bf797a ed0e21a88d
commit 4f9508c3b5
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 227 additions and 16 deletions
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1
src/libstore/build/derivation-goal.cc
View file

@ -927,6 +927,7 @@ void DerivationGoal::resolvedFinished() {
auto newRealisation = *realisation;
newRealisation.id = DrvOutput{initialOutputs.at(wantedOutput).outputHash, wantedOutput};
newRealisation.signatures.clear();
newRealisation.dependentRealisations = drvOutputReferences(worker.store, *drv, realisation->outPath);
signRealisation(newRealisation);
worker.store.registerDrvOutput(newRealisation);
} else {

11
src/libstore/ca-specific-schema.sql
View file

@ -3,10 +3,19 @@
-- is enabled
create table if not exists Realisations (
id integer primary key autoincrement not null,
drvPath text not null,
outputName text not null, -- symbolic output id, usually "out"
outputPath integer not null,
signatures text, -- space-separated list
primary key (drvPath, outputName),
foreign key (outputPath) references ValidPaths(id) on delete cascade
);
create index if not exists IndexRealisations on Realisations(drvPath, outputName);
create table if not exists RealisationsRefs (
referrer integer not null,
realisationReference integer,
foreign key (referrer) references Realisations(id) on delete cascade,
foreign key (realisationReference) references Realisations(id) on delete restrict
);

97
src/libstore/local-store.cc
View file

@ -59,6 +59,8 @@ struct LocalStore::State::Stmts {
SQLiteStmt QueryAllRealisedOutputs;
SQLiteStmt QueryPathFromHashPart;
SQLiteStmt QueryValidPaths;
SQLiteStmt QueryRealisationReferences;
SQLiteStmt AddRealisationReference;
};
int getSchema(Path schemaPath)
@ -76,7 +78,7 @@ int getSchema(Path schemaPath)
void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
{
const int nixCASchemaVersion = 1;
const int nixCASchemaVersion = 2;
int curCASchema = getSchema(schemaPath);
if (curCASchema != nixCASchemaVersion) {
if (curCASchema > nixCASchemaVersion) {
@ -94,7 +96,39 @@ void migrateCASchema(SQLite& db, Path schemaPath, AutoCloseFD& lockFd)
#include "ca-specific-schema.sql.gen.hh"
;
db.exec(schema);
curCASchema = nixCASchemaVersion;
}
if (curCASchema < 2) {
SQLiteTxn txn(db);
// Ugly little sql dance to add a new `id` column and make it the primary key
db.exec(R"(
create table Realisations2 (
id integer primary key autoincrement not null,
drvPath text not null,
outputName text not null, -- symbolic output id, usually "out"
outputPath integer not null,
signatures text, -- space-separated list
foreign key (outputPath) references ValidPaths(id) on delete cascade
);
insert into Realisations2 (drvPath, outputName, outputPath, signatures)
select drvPath, outputName, outputPath, signatures from Realisations;
drop table Realisations;
alter table Realisations2 rename to Realisations;
)");
db.exec(R"(
create index if not exists IndexRealisations on Realisations(drvPath, outputName);
create table if not exists RealisationsRefs (
referrer integer not null,
realisationReference integer,
foreign key (referrer) references Realisations(id) on delete cascade,
foreign key (realisationReference) references Realisations(id) on delete restrict
);
)");
txn.commit();
}
writeFile(schemaPath, fmt("%d", nixCASchemaVersion));
lockFile(lockFd.get(), ltRead, true);
}
@ -313,7 +347,7 @@ LocalStore::LocalStore(const Params & params)
)");
state->stmts->QueryRealisedOutput.create(state->db,
R"(
select Output.path, Realisations.signatures from Realisations
select Realisations.id, Output.path, Realisations.signatures from Realisations
inner join ValidPaths as Output on Output.id = Realisations.outputPath
where drvPath = ? and outputName = ?
;
@ -325,6 +359,19 @@ LocalStore::LocalStore(const Params & params)
where drvPath = ?
;
)");
state->stmts->QueryRealisationReferences.create(state->db,
R"(
select drvPath, outputName from Realisations
join RealisationsRefs on realisationReference = Realisations.id
where referrer = ?;
)");
state->stmts->AddRealisationReference.create(state->db,
R"(
insert or replace into RealisationsRefs (referrer, realisationReference)
values (
?,
(select id from Realisations where drvPath = ? and outputName = ?));
)");
}
}
@ -661,14 +708,22 @@ void LocalStore::registerDrvOutput(const Realisation & info, CheckSigsFlag check
void LocalStore::registerDrvOutput(const Realisation & info)
{
settings.requireExperimentalFeature("ca-derivations");
auto state(_state.lock());
retrySQLite<void>([&]() {
auto state(_state.lock());
state->stmts->RegisterRealisedOutput.use()
(info.id.strHash())
(info.id.outputName)
(printStorePath(info.outPath))
(concatStringsSep(" ", info.signatures))
.exec();
uint64_t myId = state->db.getLastInsertedRowId();
for (auto & [outputId, _] : info.dependentRealisations) {
state->stmts->AddRealisationReference.use()
(myId)
(outputId.strHash())
(outputId.outputName)
.exec();
}
});
}
@ -1684,14 +1739,38 @@ std::optional<const Realisation> LocalStore::queryRealisation(
typedef std::optional<const Realisation> Ret;
return retrySQLite<Ret>([&]() -> Ret {
auto state(_state.lock());
auto use(state->stmts->QueryRealisedOutput.use()(id.strHash())(
id.outputName));
if (!use.next())
auto useQueryRealisedOutput(state->stmts->QueryRealisedOutput.use()
(id.strHash())
(id.outputName));
if (!useQueryRealisedOutput.next())
return std::nullopt;
auto outputPath = parseStorePath(use.getStr(0));
auto signatures = tokenizeString<StringSet>(use.getStr(1));
auto realisationDbId = useQueryRealisedOutput.getInt(0);
auto outputPath = parseStorePath(useQueryRealisedOutput.getStr(1));
auto signatures =
tokenizeString<StringSet>(useQueryRealisedOutput.getStr(2));
std::map<DrvOutput, StorePath> dependentRealisations;
auto useRealisationRefs(
state->stmts->QueryRealisationReferences.use()
(realisationDbId));
while (useRealisationRefs.next()) {
auto depHash = useRealisationRefs.getStr(0);
auto depOutputName = useRealisationRefs.getStr(1);
auto useQueryRealisedOutput(state->stmts->QueryRealisedOutput.use()
(depHash)
(depOutputName));
assert(useQueryRealisedOutput.next());
auto outputPath = parseStorePath(useQueryRealisedOutput.getStr(1));
auto depId = DrvOutput { Hash::parseAnyPrefixed(depHash), depOutputName };
dependentRealisations.insert({depId, outputPath});
}
return Ret{Realisation{
.id = id, .outPath = outputPath, .signatures = signatures}};
.id = id,
.outPath = outputPath,
.signatures = signatures,
.dependentRealisations = dependentRealisations,
}};
});
}

39
src/libstore/misc.cc
View file

@ -254,5 +254,44 @@ StorePaths Store::topoSortPaths(const StorePathSet & paths)
}});
}
std::map<DrvOutput, StorePath> drvOutputReferences(
const std::set<Realisation> & inputRealisations,
const StorePathSet & pathReferences)
{
std::map<DrvOutput, StorePath> res;
for (const auto & input : inputRealisations) {
if (pathReferences.count(input.outPath)) {
res.insert({input.id, input.outPath});
}
}
return res;
}
std::map<DrvOutput, StorePath> drvOutputReferences(
Store & store,
const Derivation & drv,
const StorePath & outputPath)
{
std::set<Realisation> inputRealisations;
for (const auto& [inputDrv, outputNames] : drv.inputDrvs) {
auto outputHashes =
staticOutputHashes(store, store.readDerivation(inputDrv));
for (const auto& outputName : outputNames) {
auto thisRealisation = store.queryRealisation(
DrvOutput{outputHashes.at(outputName), outputName});
if (!thisRealisation)
throw Error(
"output '%s' of derivation '%s' isn’t built", outputName,
store.printStorePath(inputDrv));
inputRealisations.insert(*thisRealisation);
}
}
auto info = store.queryPathInfo(outputPath);
return drvOutputReferences(Realisation::closure(store, inputRealisations), info->references);
}
}

48
src/libstore/realisation.cc
View file

@ -1,5 +1,6 @@
#include "realisation.hh"
#include "store-api.hh"
#include "closure.hh"
#include <nlohmann/json.hpp>
namespace nix {
@ -21,11 +22,52 @@ std::string DrvOutput::to_string() const {
return strHash() + "!" + outputName;
}
std::set<Realisation> Realisation::closure(Store & store, const std::set<Realisation> & startOutputs)
{
std::set<Realisation> res;
Realisation::closure(store, startOutputs, res);
return res;
}
void Realisation::closure(Store & store, const std::set<Realisation> & startOutputs, std::set<Realisation> & res)
{
auto getDeps = [&](const Realisation& current) -> std::set<Realisation> {
std::set<Realisation> res;
for (auto& [currentDep, _] : current.dependentRealisations) {
if (auto currentRealisation = store.queryRealisation(currentDep))
res.insert(*currentRealisation);
else
throw Error(
"Unrealised derivation '%s'", currentDep.to_string());
}
return res;
};
computeClosure<Realisation>(
startOutputs, res,
[&](const Realisation& current,
std::function<void(std::promise<std::set<Realisation>>&)>
processEdges) {
std::promise<std::set<Realisation>> promise;
try {
auto res = getDeps(current);
promise.set_value(res);
} catch (...) {
promise.set_exception(std::current_exception());
}
return processEdges(promise);
});
}
nlohmann::json Realisation::toJSON() const {
auto jsonDependentRealisations = nlohmann::json::object();
for (auto & [depId, depOutPath] : dependentRealisations)
jsonDependentRealisations.emplace(depId.to_string(), depOutPath.to_string());
return nlohmann::json{
{"id", id.to_string()},
{"outPath", outPath.to_string()},
{"signatures", signatures},
{"dependentRealisations", jsonDependentRealisations},
};
}
@ -51,10 +93,16 @@ Realisation Realisation::fromJSON(
if (auto signaturesIterator = json.find("signatures"); signaturesIterator != json.end())
signatures.insert(signaturesIterator->begin(), signaturesIterator->end());
std::map <DrvOutput, StorePath> dependentRealisations;
if (auto jsonDependencies = json.find("dependentRealisations"); jsonDependencies != json.end())
for (auto & [jsonDepId, jsonDepOutPath] : jsonDependencies->get<std::map<std::string, std::string>>())
dependentRealisations.insert({DrvOutput::parse(jsonDepId), StorePath(jsonDepOutPath)});
return Realisation{
.id = DrvOutput::parse(getField("id")),
.outPath = StorePath(getField("outPath")),
.signatures = signatures,
.dependentRealisations = dependentRealisations,
};
}

11
src/libstore/realisation.hh
View file

@ -28,6 +28,14 @@ struct Realisation {
StringSet signatures;
/**
* The realisations that are required for the current one to be valid.
*
* When importing this realisation, the store will first check that all its
* dependencies exist, and map to the correct output path
*/
std::map<DrvOutput, StorePath> dependentRealisations;
nlohmann::json toJSON() const;
static Realisation fromJSON(const nlohmann::json& json, const std::string& whence);
@ -36,6 +44,9 @@ struct Realisation {
bool checkSignature(const PublicKeys & publicKeys, const std::string & sig) const;
size_t checkSignatures(const PublicKeys & publicKeys) const;
static std::set<Realisation> closure(Store &, const std::set<Realisation> &);
static void closure(Store &, const std::set<Realisation> &, std::set<Realisation>& res);
StorePath getPath() const { return outPath; }
GENERATE_CMP(Realisation, me->id, me->outPath);

31
src/libstore/store-api.cc
View file

@ -780,20 +780,39 @@ std::map<StorePath, StorePath> copyPaths(ref<Store> srcStore, ref<Store> dstStor
RepairFlag repair, CheckSigsFlag checkSigs, SubstituteFlag substitute)
{
StorePathSet storePaths;
std::set<Realisation> realisations;
std::set<Realisation> toplevelRealisations;
for (auto & path : paths) {
storePaths.insert(path.path());
if (auto realisation = std::get_if<Realisation>(&path.raw)) {
settings.requireExperimentalFeature("ca-derivations");
realisations.insert(*realisation);
toplevelRealisations.insert(*realisation);
}
}
auto pathsMap = copyPaths(srcStore, dstStore, storePaths, repair, checkSigs, substitute);
ThreadPool pool;
try {
for (auto & realisation : realisations) {
dstStore->registerDrvOutput(realisation, checkSigs);
}
} catch (MissingExperimentalFeature & e) {
// Copy the realisation closure
processGraph<Realisation>(
pool, Realisation::closure(*srcStore, toplevelRealisations),
[&](const Realisation& current) -> std::set<Realisation> {
std::set<Realisation> children;
for (const auto& [drvOutput, _] : current.dependentRealisations) {
auto currentChild = srcStore->queryRealisation(drvOutput);
if (!currentChild)
throw Error(
"Incomplete realisation closure: '%s' is a "
"dependency of '%s' but isn’t registered",
drvOutput.to_string(), current.id.to_string());
children.insert(*currentChild);
}
return children;
},
[&](const Realisation& current) -> void {
dstStore->registerDrvOutput(current, checkSigs);
});
} catch (MissingExperimentalFeature& e) {
// Don't fail if the remote doesn't support CA derivations is it might
// not be within our control to change that, and we might still want
// to at least copy the output paths.

5
src/libstore/store-api.hh
View file

@ -864,4 +864,9 @@ std::pair<std::string, Store::Params> splitUriAndParams(const std::string & uri)
std::optional<ContentAddress> getDerivationCA(const BasicDerivation & drv);
std::map<DrvOutput, StorePath> drvOutputReferences(
Store & store,
const Derivation & drv,
const StorePath & outputPath);
}