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Move path info caching from BinaryCacheStore to Store

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Caching path info is generally useful. For instance, it speeds up "nix
path-info -rS /run/current-system" (i.e. showing the closure sizes of
all paths in the closure of the current system) from 5.6s to 0.15s.

This also eliminates some APIs like Store::queryDeriver() and
Store::queryReferences().
This commit is contained in:
Eelco Dolstra 2016-04-19 18:50:15 +02:00
parent 608b0265e1
commit e0204f8d46
21 changed files with 318 additions and 353 deletions
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21
perl/lib/Nix/Store.xs
View file

@ -70,8 +70,7 @@ int isValidPath(char * path)
SV * queryReferences(char * path)
PPCODE:
try {
PathSet paths;
store()->queryReferences(path, paths);
PathSet paths = store()->queryPathInfo(path)->references;
for (PathSet::iterator i = paths.begin(); i != paths.end(); ++i)
XPUSHs(sv_2mortal(newSVpv(i->c_str(), 0)));
} catch (Error & e) {
@ -82,7 +81,7 @@ SV * queryReferences(char * path)
SV * queryPathHash(char * path)
PPCODE:
try {
Hash hash = store()->queryPathHash(path);
auto hash = store()->queryPathInfo(path)->narHash;
string s = "sha256:" + printHash32(hash);
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
} catch (Error & e) {
@ -93,7 +92,7 @@ SV * queryPathHash(char * path)
SV * queryDeriver(char * path)
PPCODE:
try {
Path deriver = store()->queryDeriver(path);
auto deriver = store()->queryPathInfo(path)->deriver;
if (deriver == "") XSRETURN_UNDEF;
XPUSHs(sv_2mortal(newSVpv(deriver.c_str(), 0)));
} catch (Error & e) {
@ -104,17 +103,17 @@ SV * queryDeriver(char * path)
SV * queryPathInfo(char * path, int base32)
PPCODE:
try {
ValidPathInfo info = store()->queryPathInfo(path);
if (info.deriver == "")
auto info = store()->queryPathInfo(path);
if (info->deriver == "")
XPUSHs(&PL_sv_undef);
else
XPUSHs(sv_2mortal(newSVpv(info.deriver.c_str(), 0)));
string s = "sha256:" + (base32 ? printHash32(info.narHash) : printHash(info.narHash));
XPUSHs(sv_2mortal(newSVpv(info->deriver.c_str(), 0)));
string s = "sha256:" + (base32 ? printHash32(info->narHash) : printHash(info->narHash));
XPUSHs(sv_2mortal(newSVpv(s.c_str(), 0)));
mXPUSHi(info.registrationTime);
mXPUSHi(info.narSize);
mXPUSHi(info->registrationTime);
mXPUSHi(info->narSize);
AV * arr = newAV();
for (PathSet::iterator i = info.references.begin(); i != info.references.end(); ++i)
for (PathSet::iterator i = info->references.begin(); i != info->references.end(); ++i)
av_push(arr, newSVpv(i->c_str(), 0));
XPUSHs(sv_2mortal(newRV((SV *) arr)));
} catch (Error & e) {

116
src/libstore/binary-cache-store.cc
View file

@ -40,11 +40,6 @@ void BinaryCacheStore::notImpl()
throw Error("operation not implemented for binary cache stores");
}
const BinaryCacheStore::Stats & BinaryCacheStore::getStats()
{
return stats;
}
Path BinaryCacheStore::narInfoFileFor(const Path & storePath)
{
assertStorePath(storePath);
@ -100,67 +95,15 @@ void BinaryCacheStore::addToCache(const ValidPathInfo & info,
{
auto state_(state.lock());
state_->narInfoCache.upsert(narInfo->path, narInfo);
stats.narInfoCacheSize = state_->narInfoCache.size();
state_->pathInfoCache.upsert(narInfo->path, std::shared_ptr<NarInfo>(narInfo));
stats.pathInfoCacheSize = state_->pathInfoCache.size();
}
stats.narInfoWrite++;
}
NarInfo BinaryCacheStore::readNarInfo(const Path & storePath)
bool BinaryCacheStore::isValidPathUncached(const Path & storePath)
{
{
auto state_(state.lock());
auto res = state_->narInfoCache.get(storePath);
if (res) {
stats.narInfoReadAverted++;
if (!*res)
throw InvalidPath(format("path ‘%s’ is not valid") % storePath);
return **res;
}
}
auto narInfoFile = narInfoFileFor(storePath);
auto data = getFile(narInfoFile);
if (!data) {
stats.narInfoMissing++;
auto state_(state.lock());
state_->narInfoCache.upsert(storePath, 0);
stats.narInfoCacheSize = state_->narInfoCache.size();
throw InvalidPath(format("path ‘%s’ is not valid") % storePath);
}
auto narInfo = make_ref<NarInfo>(*data, narInfoFile);
if (narInfo->path != storePath)
throw Error(format("NAR info file for store path ‘%1%’ does not match ‘%2%’") % narInfo->path % storePath);
stats.narInfoRead++;
if (publicKeys) {
if (!narInfo->checkSignatures(*publicKeys))
throw Error(format("no good signature on NAR info file ‘%1%’") % narInfoFile);
}
{
auto state_(state.lock());
state_->narInfoCache.upsert(storePath, narInfo);
stats.narInfoCacheSize = state_->narInfoCache.size();
}
return *narInfo;
}
bool BinaryCacheStore::isValidPath(const Path & storePath)
{
{
auto state_(state.lock());
auto res = state_->narInfoCache.get(storePath);
if (res) {
stats.narInfoReadAverted++;
return *res != 0;
}
}
// FIXME: this only checks whether a .narinfo with a matching hash
// part exists. So ‘f4kb...-foo’ matches ‘f4kb...-bar’, even
// though they shouldn't. Not easily fixed.
@ -169,20 +112,20 @@ bool BinaryCacheStore::isValidPath(const Path & storePath)
void BinaryCacheStore::narFromPath(const Path & storePath, Sink & sink)
{
auto res = readNarInfo(storePath);
auto info = queryPathInfo(storePath).cast<const NarInfo>();
auto nar = getFile(res.url);
auto nar = getFile(info->url);
if (!nar) throw Error(format("file ‘%s’ missing from binary cache") % res.url);
if (!nar) throw Error(format("file ‘%s’ missing from binary cache") % info->url);
stats.narRead++;
stats.narReadCompressedBytes += nar->size();
/* Decompress the NAR. FIXME: would be nice to have the remote
side do this. */
if (res.compression == "none")
if (info->compression == "none")
;
else if (res.compression == "xz")
else if (info->compression == "xz")
nar = decompressXZ(*nar);
else
throw Error(format("unknown NAR compression type ‘%1%’") % nar);
@ -200,13 +143,13 @@ void BinaryCacheStore::exportPath(const Path & storePath, bool sign, Sink & sink
{
assert(!sign);
auto res = readNarInfo(storePath);
auto res = queryPathInfo(storePath);
narFromPath(storePath, sink);
// FIXME: check integrity of NAR.
sink << exportMagic << storePath << res.references << res.deriver << 0;
sink << exportMagic << storePath << res->references << res->deriver << 0;
}
Paths BinaryCacheStore::importPaths(bool requireSignature, Source & source,
@ -244,9 +187,24 @@ struct NopSink : ParseSink
{
};
ValidPathInfo BinaryCacheStore::queryPathInfo(const Path & storePath)
std::shared_ptr<ValidPathInfo> BinaryCacheStore::queryPathInfoUncached(const Path & storePath)
{
return ValidPathInfo(readNarInfo(storePath));
auto narInfoFile = narInfoFileFor(storePath);
auto data = getFile(narInfoFile);
if (!data) return 0;
auto narInfo = make_ref<NarInfo>(*data, narInfoFile);
if (narInfo->path != storePath)
throw Error(format("NAR info file for store path ‘%1%’ does not match ‘%2%’") % narInfo->path % storePath);
stats.narInfoRead++;
if (publicKeys) {
if (!narInfo->checkSignatures(*publicKeys))
throw Error(format("no good signature on NAR info file ‘%1%’") % narInfoFile);
}
return std::shared_ptr<NarInfo>(narInfo);
}
void BinaryCacheStore::querySubstitutablePathInfos(const PathSet & paths,
@ -257,16 +215,16 @@ void BinaryCacheStore::querySubstitutablePathInfos(const PathSet & paths,
if (!localStore) return;
for (auto & storePath : paths) {
if (!localStore->isValidPath(storePath)) {
left.insert(storePath);
continue;
}
ValidPathInfo info = localStore->queryPathInfo(storePath);
try {
auto info = localStore->queryPathInfo(storePath);
SubstitutablePathInfo sub;
sub.references = info.references;
sub.references = info->references;
sub.downloadSize = 0;
sub.narSize = info.narSize;
sub.narSize = info->narSize;
infos.emplace(storePath, sub);
} catch (InvalidPath &) {
left.insert(storePath);
}
}
if (settings.useSubstitutes)
@ -332,16 +290,16 @@ void BinaryCacheStore::buildPaths(const PathSet & paths, BuildMode buildMode)
if (!localStore->isValidPath(storePath))
localStore->ensurePath(storePath);
ValidPathInfo info = localStore->queryPathInfo(storePath);
auto info = localStore->queryPathInfo(storePath);
for (auto & ref : info.references)
for (auto & ref : info->references)
if (ref != storePath)
ensurePath(ref);
StringSink sink;
dumpPath(storePath, sink);
addToCache(info, *sink.s);
addToCache(*info, *sink.s);
}
}

44
src/libstore/binary-cache-store.hh
View file

@ -3,8 +3,6 @@
#include "crypto.hh"
#include "store-api.hh"
#include "lru-cache.hh"
#include "sync.hh"
#include "pool.hh"
#include <atomic>
@ -22,13 +20,6 @@ private:
std::shared_ptr<Store> localStore;
struct State
{
LRUCache<Path, std::shared_ptr<NarInfo>> narInfoCache{64 * 1024};
};
Sync<State> state;
protected:
BinaryCacheStore(std::shared_ptr<Store> localStore, const Path & secretKeyFile);
@ -47,42 +38,17 @@ public:
virtual void init();
struct Stats
{
std::atomic<uint64_t> narInfoRead{0};
std::atomic<uint64_t> narInfoReadAverted{0};
std::atomic<uint64_t> narInfoMissing{0};
std::atomic<uint64_t> narInfoWrite{0};
std::atomic<uint64_t> narInfoCacheSize{0};
std::atomic<uint64_t> narRead{0};
std::atomic<uint64_t> narReadBytes{0};
std::atomic<uint64_t> narReadCompressedBytes{0};
std::atomic<uint64_t> narWrite{0};
std::atomic<uint64_t> narWriteAverted{0};
std::atomic<uint64_t> narWriteBytes{0};
std::atomic<uint64_t> narWriteCompressedBytes{0};
std::atomic<uint64_t> narWriteCompressionTimeMs{0};
};
const Stats & getStats();
private:
Stats stats;
std::string narMagic;
std::string narInfoFileFor(const Path & storePath);
void addToCache(const ValidPathInfo & info, const string & nar);
protected:
NarInfo readNarInfo(const Path & storePath);
public:
bool isValidPath(const Path & path) override;
bool isValidPathUncached(const Path & path) override;
PathSet queryValidPaths(const PathSet & paths) override
{ notImpl(); }
@ -90,18 +56,12 @@ public:
PathSet queryAllValidPaths() override
{ notImpl(); }
ValidPathInfo queryPathInfo(const Path & path) override;
Hash queryPathHash(const Path & path) override
{ notImpl(); }
std::shared_ptr<ValidPathInfo> queryPathInfoUncached(const Path & path) override;
void queryReferrers(const Path & path,
PathSet & referrers) override
{ notImpl(); }
Path queryDeriver(const Path & path) override
{ return ""; }
PathSet queryValidDerivers(const Path & path) override
{ return {}; }

10
src/libstore/build.cc
View file

@ -2724,7 +2724,7 @@ void DerivationGoal::registerOutputs()
if (buildMode == bmCheck) {
if (!worker.store.isValidPath(path)) continue;
ValidPathInfo info = worker.store.queryPathInfo(path);
auto info = *worker.store.queryPathInfo(path);
if (hash.first != info.narHash) {
if (settings.keepFailed) {
Path dst = path + checkSuffix;
@ -3778,14 +3778,14 @@ bool Worker::pathContentsGood(const Path & path)
std::map<Path, bool>::iterator i = pathContentsGoodCache.find(path);
if (i != pathContentsGoodCache.end()) return i->second;
printMsg(lvlInfo, format("checking path ‘%1%’...") % path);
ValidPathInfo info = store.queryPathInfo(path);
auto info = store.queryPathInfo(path);
bool res;
if (!pathExists(path))
res = false;
else {
HashResult current = hashPath(info.narHash.type, path);
HashResult current = hashPath(info->narHash.type, path);
Hash nullHash(htSHA256);
res = info.narHash == nullHash || info.narHash == current.first;
res = info->narHash == nullHash || info->narHash == current.first;
}
pathContentsGoodCache[path] = res;
if (!res) printMsg(lvlError, format("path ‘%1%’ is corrupted or missing!") % path);
@ -3881,7 +3881,7 @@ void LocalStore::repairPath(const Path & path)
if (goal->getExitCode() != Goal::ecSuccess) {
/* Since substituting the path didn't work, if we have a valid
deriver, then rebuild the deriver. */
Path deriver = queryDeriver(path);
auto deriver = queryPathInfo(path)->deriver;
if (deriver != "" && isValidPath(deriver)) {
goals.clear();
goals.insert(worker.makeDerivationGoal(deriver, StringSet(), bmRepair));

4
src/libstore/gc.cc
View file

@ -407,7 +407,7 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
queryReferrers(path, referrers);
for (auto & i : referrers)
if (i != path) deletePathRecursive(state, i);
size = queryPathInfo(path).narSize;
size = queryPathInfo(path)->narSize;
invalidatePathChecked(path);
}
@ -485,7 +485,7 @@ bool LocalStore::canReachRoot(GCState & state, PathSet & visited, const Path & p
if (state.gcKeepDerivations && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
for (auto & i : outputs)
if (isValidPath(i) && queryDeriver(i) == path)
if (isValidPath(i) && queryPathInfo(i)->deriver == path)
incoming.insert(i);
}

99
src/libstore/local-store.cc
View file

@ -577,6 +577,12 @@ uint64_t LocalStore::addValidPath(State & state,
}
}
{
auto state_(Store::state.lock());
state_->pathInfoCache.upsert(info.path, std::make_shared<ValidPathInfo>(info));
stats.pathInfoCacheSize = state_->pathInfoCache.size();
}
return id;
}
@ -595,44 +601,44 @@ Hash parseHashField(const Path & path, const string & s)
}
ValidPathInfo LocalStore::queryPathInfo(const Path & path)
std::shared_ptr<ValidPathInfo> LocalStore::queryPathInfoUncached(const Path & path)
{
ValidPathInfo info;
info.path = path;
auto info = std::make_shared<ValidPathInfo>();
info->path = path;
assertStorePath(path);
return retrySQLite<ValidPathInfo>([&]() {
return retrySQLite<std::shared_ptr<ValidPathInfo>>([&]() {
auto state(_state.lock());
/* Get the path info. */
auto useQueryPathInfo(state->stmtQueryPathInfo.use()(path));
if (!useQueryPathInfo.next())
throw Error(format("path ‘%1%’ is not valid") % path);
return std::shared_ptr<ValidPathInfo>();
info.id = useQueryPathInfo.getInt(0);
info->id = useQueryPathInfo.getInt(0);
info.narHash = parseHashField(path, useQueryPathInfo.getStr(1));
info->narHash = parseHashField(path, useQueryPathInfo.getStr(1));
info.registrationTime = useQueryPathInfo.getInt(2);
info->registrationTime = useQueryPathInfo.getInt(2);
auto s = (const char *) sqlite3_column_text(state->stmtQueryPathInfo, 3);
if (s) info.deriver = s;
if (s) info->deriver = s;
/* Note that narSize = NULL yields 0. */
info.narSize = useQueryPathInfo.getInt(4);
info->narSize = useQueryPathInfo.getInt(4);
info.ultimate = useQueryPathInfo.getInt(5) == 1;
info->ultimate = useQueryPathInfo.getInt(5) == 1;
s = (const char *) sqlite3_column_text(state->stmtQueryPathInfo, 6);
if (s) info.sigs = tokenizeString<StringSet>(s, " ");
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
/* Get the references. */
auto useQueryReferences(state->stmtQueryReferences.use()(info.id));
auto useQueryReferences(state->stmtQueryReferences.use()(info->id));
while (useQueryReferences.next())
info.references.insert(useQueryReferences.getStr(0));
info->references.insert(useQueryReferences.getStr(0));
return info;
});
@ -661,17 +667,17 @@ uint64_t LocalStore::queryValidPathId(State & state, const Path & path)
}
bool LocalStore::isValidPath(State & state, const Path & path)
bool LocalStore::isValidPath_(State & state, const Path & path)
{
return state.stmtQueryPathInfo.use()(path).next();
}
bool LocalStore::isValidPath(const Path & path)
bool LocalStore::isValidPathUncached(const Path & path)
{
return retrySQLite<bool>([&]() {
auto state(_state.lock());
return isValidPath(*state, path);
return isValidPath_(*state, path);
});
}
@ -716,12 +722,6 @@ void LocalStore::queryReferrers(const Path & path, PathSet & referrers)
}
Path LocalStore::queryDeriver(const Path & path)
{
return queryPathInfo(path).deriver;
}
PathSet LocalStore::queryValidDerivers(const Path & path)
{
assertStorePath(path);
@ -996,12 +996,6 @@ void LocalStore::querySubstitutablePathInfos(const PathSet & paths,
}
Hash LocalStore::queryPathHash(const Path & path)
{
return queryPathInfo(path).narHash;
}
void LocalStore::registerValidPath(const ValidPathInfo & info)
{
ValidPathInfos infos;
@ -1026,7 +1020,7 @@ void LocalStore::registerValidPaths(const ValidPathInfos & infos)
for (auto & i : infos) {
assert(i.narHash.type == htSHA256);
if (isValidPath(*state, i.path))
if (isValidPath_(*state, i.path))
updatePathInfo(*state, i);
else
addValidPath(*state, i, false);
@ -1071,6 +1065,12 @@ void LocalStore::invalidatePath(State & state, const Path & path)
/* Note that the foreign key constraints on the Refs table take
care of deleting the references entries for `path'. */
{
auto state_(Store::state.lock());
state_->pathInfoCache.erase(path);
stats.pathInfoCacheSize = state_->pathInfoCache.size();
}
}
@ -1225,8 +1225,7 @@ void LocalStore::exportPath(const Path & path, bool sign,
printMsg(lvlTalkative, format("exporting path ‘%1%’") % path);
if (!isValidPath(path))
throw Error(format("path ‘%1%’ is not valid") % path);
auto info = queryPathInfo(path);
HashAndWriteSink hashAndWriteSink(sink);
@ -1236,15 +1235,11 @@ void LocalStore::exportPath(const Path & path, bool sign,
filesystem corruption from spreading to other machines.
Don't complain if the stored hash is zero (unknown). */
Hash hash = hashAndWriteSink.currentHash();
Hash storedHash = queryPathHash(path);
if (hash != storedHash && storedHash != Hash(storedHash.type))
if (hash != info->narHash && info->narHash != Hash(info->narHash.type))
throw Error(format("hash of path ‘%1%’ has changed from ‘%2%’ to ‘%3%’!") % path
% printHash(storedHash) % printHash(hash));
% printHash(info->narHash) % printHash(hash));
PathSet references;
queryReferences(path, references);
hashAndWriteSink << exportMagic << path << references << queryDeriver(path);
hashAndWriteSink << exportMagic << path << info->references << info->deriver;
if (sign) {
Hash hash = hashAndWriteSink.currentHash();
@ -1440,7 +1435,7 @@ void LocalStore::invalidatePathChecked(const Path & path)
SQLiteTxn txn(state->db);
if (isValidPath(*state, path)) {
if (isValidPath_(*state, path)) {
PathSet referrers; queryReferrers(*state, path, referrers);
referrers.erase(path); /* ignore self-references */
if (!referrers.empty())
@ -1486,38 +1481,38 @@ bool LocalStore::verifyStore(bool checkContents, bool repair)
for (auto & i : validPaths) {
try {
ValidPathInfo info = queryPathInfo(i);
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(i)));
/* Check the content hash (optionally - slow). */
printMsg(lvlTalkative, format("checking contents of ‘%1%’") % i);
HashResult current = hashPath(info.narHash.type, i);
HashResult current = hashPath(info->narHash.type, i);
if (info.narHash != nullHash && info.narHash != current.first) {
if (info->narHash != nullHash && info->narHash != current.first) {
printMsg(lvlError, format("path ‘%1%’ was modified! "
"expected hash ‘%2%’, got ‘%3%’")
% i % printHash(info.narHash) % printHash(current.first));
% i % printHash(info->narHash) % printHash(current.first));
if (repair) repairPath(i); else errors = true;
} else {
bool update = false;
/* Fill in missing hashes. */
if (info.narHash == nullHash) {
if (info->narHash == nullHash) {
printMsg(lvlError, format("fixing missing hash on ‘%1%’") % i);
info.narHash = current.first;
info->narHash = current.first;
update = true;
}
/* Fill in missing narSize fields (from old stores). */
if (info.narSize == 0) {
if (info->narSize == 0) {
printMsg(lvlError, format("updating size field on ‘%1%’ to %2%") % i % current.second);
info.narSize = current.second;
info->narSize = current.second;
update = true;
}
if (update) {
auto state(_state.lock());
updatePathInfo(*state, info);
updatePathInfo(*state, *info);
}
}
@ -1656,11 +1651,11 @@ void LocalStore::addSignatures(const Path & storePath, const StringSet & sigs)
SQLiteTxn txn(state->db);
auto info = queryPathInfo(storePath);
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(storePath)));
info.sigs.insert(sigs.begin(), sigs.end());
info->sigs.insert(sigs.begin(), sigs.end());
updatePathInfo(*state, info);
updatePathInfo(*state, *info);
txn.commit();
});

10
src/libstore/local-store.hh
View file

@ -102,20 +102,16 @@ public:
/* Implementations of abstract store API methods. */
bool isValidPath(const Path & path) override;
bool isValidPathUncached(const Path & path) override;
PathSet queryValidPaths(const PathSet & paths) override;
PathSet queryAllValidPaths() override;
ValidPathInfo queryPathInfo(const Path & path) override;
Hash queryPathHash(const Path & path) override;
std::shared_ptr<ValidPathInfo> queryPathInfoUncached(const Path & path) override;
void queryReferrers(const Path & path, PathSet & referrers) override;
Path queryDeriver(const Path & path) override;
PathSet queryValidDerivers(const Path & path) override;
PathSet queryDerivationOutputs(const Path & path) override;
@ -270,7 +266,7 @@ private:
void optimisePath_(OptimiseStats & stats, const Path & path, InodeHash & inodeHash);
// Internal versions that are not wrapped in retry_sqlite.
bool isValidPath(State & state, const Path & path);
bool isValidPath_(State & state, const Path & path);
void queryReferrers(State & state, const Path & path, PathSet & referrers);
/* Add signatures to a ValidPathInfo using the secret keys

17
src/libstore/misc.cc
View file

@ -35,12 +35,13 @@ void Store::computeFSClosure(const Path & path,
if (includeDerivers && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
for (auto & i : outputs)
if (isValidPath(i) && queryDeriver(i) == path)
if (isValidPath(i) && queryPathInfo(i)->deriver == path)
edges.insert(i);
}
} else {
queryReferences(path, edges);
auto info = queryPathInfo(path);
edges = info->references;
if (includeOutputs && isDerivation(path)) {
PathSet outputs = queryDerivationOutputs(path);
@ -48,10 +49,8 @@ void Store::computeFSClosure(const Path & path,
if (isValidPath(i)) edges.insert(i);
}
if (includeDerivers) {
Path deriver = queryDeriver(path);
if (isValidPath(deriver)) edges.insert(deriver);
}
if (includeDerivers && isValidPath(info->deriver))
edges.insert(info->deriver);
}
for (auto & i : edges)
@ -189,8 +188,10 @@ Paths Store::topoSortPaths(const PathSet & paths)
parents.insert(path);
PathSet references;
if (isValidPath(path))
queryReferences(path, references);
try {
references = queryPathInfo(path)->references;
} catch (InvalidPath &) {
}
for (auto & i : references)
/* Don't traverse into paths that don't exist. That can

62
src/libstore/remote-store.cc
View file

@ -141,7 +141,7 @@ void RemoteStore::setOptions(ref<Connection> conn)
}
bool RemoteStore::isValidPath(const Path & path)
bool RemoteStore::isValidPathUncached(const Path & path)
{
auto conn(connections->get());
conn->to << wopIsValidPath << path;
@ -239,48 +239,27 @@ void RemoteStore::querySubstitutablePathInfos(const PathSet & paths,
}
ValidPathInfo RemoteStore::queryPathInfo(const Path & path)
std::shared_ptr<ValidPathInfo> RemoteStore::queryPathInfoUncached(const Path & path)
{
auto conn(connections->get());
conn->to << wopQueryPathInfo << path;
conn->processStderr();
ValidPathInfo info;
info.path = path;
info.deriver = readString(conn->from);
if (info.deriver != "") assertStorePath(info.deriver);
info.narHash = parseHash(htSHA256, readString(conn->from));
info.references = readStorePaths<PathSet>(conn->from);
info.registrationTime = readInt(conn->from);
info.narSize = readLongLong(conn->from);
auto info = std::make_shared<ValidPathInfo>();
info->path = path;
info->deriver = readString(conn->from);
if (info->deriver != "") assertStorePath(info->deriver);
info->narHash = parseHash(htSHA256, readString(conn->from));
info->references = readStorePaths<PathSet>(conn->from);
info->registrationTime = readInt(conn->from);
info->narSize = readLongLong(conn->from);
if (GET_PROTOCOL_MINOR(conn->daemonVersion) >= 16) {
info.ultimate = readInt(conn->from) != 0;
info.sigs = readStrings<StringSet>(conn->from);
info->ultimate = readInt(conn->from) != 0;
info->sigs = readStrings<StringSet>(conn->from);
}
return info;
}
Hash RemoteStore::queryPathHash(const Path & path)
{
auto conn(connections->get());
conn->to << wopQueryPathHash << path;
conn->processStderr();
string hash = readString(conn->from);
return parseHash(htSHA256, hash);
}
void RemoteStore::queryReferences(const Path & path,
PathSet & references)
{
auto conn(connections->get());
conn->to << wopQueryReferences << path;
conn->processStderr();
PathSet references2 = readStorePaths<PathSet>(conn->from);
references.insert(references2.begin(), references2.end());
}
void RemoteStore::queryReferrers(const Path & path,
PathSet & referrers)
{
@ -292,17 +271,6 @@ void RemoteStore::queryReferrers(const Path & path,
}
Path RemoteStore::queryDeriver(const Path & path)
{
auto conn(connections->get());
conn->to << wopQueryDeriver << path;
conn->processStderr();
Path drvPath = readString(conn->from);
if (drvPath != "") assertStorePath(drvPath);
return drvPath;
}
PathSet RemoteStore::queryValidDerivers(const Path & path)
{
auto conn(connections->get());
@ -517,6 +485,12 @@ void RemoteStore::collectGarbage(const GCOptions & options, GCResults & results)
results.paths = readStrings<PathSet>(conn->from);
results.bytesFreed = readLongLong(conn->from);
readLongLong(conn->from); // obsolete
{
auto state_(Store::state.lock());
state_->pathInfoCache.clear();
stats.pathInfoCacheSize = 0;
}
}

10
src/libstore/remote-store.hh
View file

@ -26,22 +26,16 @@ public:
/* Implementations of abstract store API methods. */
bool isValidPath(const Path & path) override;
bool isValidPathUncached(const Path & path) override;
PathSet queryValidPaths(const PathSet & paths) override;
PathSet queryAllValidPaths() override;
ValidPathInfo queryPathInfo(const Path & path) override;
Hash queryPathHash(const Path & path) override;
void queryReferences(const Path & path, PathSet & references) override;
std::shared_ptr<ValidPathInfo> queryPathInfoUncached(const Path & path) override;
void queryReferrers(const Path & path, PathSet & referrers) override;
Path queryDeriver(const Path & path) override;
PathSet queryValidDerivers(const Path & path) override;
PathSet queryDerivationOutputs(const Path & path) override;

62
src/libstore/store-api.cc
View file

@ -225,10 +225,48 @@ Path computeStorePathForText(const string & name, const string & s,
}
void Store::queryReferences(const Path & path, PathSet & references)
bool Store::isValidPath(const Path & storePath)
{
ValidPathInfo info = queryPathInfo(path);
references.insert(info.references.begin(), info.references.end());
{
auto state_(state.lock());
auto res = state_->pathInfoCache.get(storePath);
if (res) {
stats.narInfoReadAverted++;
return *res != 0;
}
}
return isValidPathUncached(storePath);
}
ref<const ValidPathInfo> Store::queryPathInfo(const Path & storePath)
{
{
auto state_(state.lock());
auto res = state_->pathInfoCache.get(storePath);
if (res) {
stats.narInfoReadAverted++;
if (!*res)
throw InvalidPath(format("path ‘%s’ is not valid") % storePath);
return ref<ValidPathInfo>(*res);
}
}
auto info = queryPathInfoUncached(storePath);
{
auto state_(state.lock());
state_->pathInfoCache.upsert(storePath, info);
stats.pathInfoCacheSize = state_->pathInfoCache.size();
}
if (!info) {
stats.narInfoMissing++;
throw InvalidPath(format("path ‘%s’ is not valid") % storePath);
}
return ref<ValidPathInfo>(info);
}
@ -243,19 +281,19 @@ string Store::makeValidityRegistration(const PathSet & paths,
for (auto & i : paths) {
s += i + "\n";
ValidPathInfo info = queryPathInfo(i);
auto info = queryPathInfo(i);
if (showHash) {
s += printHash(info.narHash) + "\n";
s += (format("%1%\n") % info.narSize).str();
s += printHash(info->narHash) + "\n";
s += (format("%1%\n") % info->narSize).str();
}
Path deriver = showDerivers ? info.deriver : "";
Path deriver = showDerivers ? info->deriver : "";
s += deriver + "\n";
s += (format("%1%\n") % info.references.size()).str();
s += (format("%1%\n") % info->references.size()).str();
for (auto & j : info.references)
for (auto & j : info->references)
s += j + "\n";
}
@ -263,6 +301,12 @@ string Store::makeValidityRegistration(const PathSet & paths,
}
const Store::Stats & Store::getStats()
{
return stats;
}
ValidPathInfo decodeValidPathInfo(std::istream & str, bool hashGiven)
{
ValidPathInfo info;

62
src/libstore/store-api.hh
View file

@ -3,11 +3,14 @@
#include "hash.hh"
#include "serialise.hh"
#include "crypto.hh"
#include "lru-cache.hh"
#include "sync.hh"
#include <string>
#include <atomic>
#include <limits>
#include <map>
#include <memory>
#include <string>
namespace nix {
@ -130,6 +133,8 @@ struct ValidPathInfo
/* Verify a single signature. */
bool checkSignature(const PublicKeys & publicKeys, const std::string & sig) const;
virtual ~ValidPathInfo() { }
};
typedef list<ValidPathInfo> ValidPathInfos;
@ -169,12 +174,27 @@ class FSAccessor;
class Store : public std::enable_shared_from_this<Store>
{
protected:
struct State
{
LRUCache<Path, std::shared_ptr<ValidPathInfo>> pathInfoCache{64 * 1024};
};
Sync<State> state;
public:
virtual ~Store() { }
/* Check whether a path is valid. */
virtual bool isValidPath(const Path & path) = 0;
bool isValidPath(const Path & path);
protected:
virtual bool isValidPathUncached(const Path & path) = 0;
public:
/* Query which of the given paths is valid. */
virtual PathSet queryValidPaths(const PathSet & paths) = 0;
@ -183,24 +203,19 @@ public:
virtual PathSet queryAllValidPaths() = 0;
/* Query information about a valid path. */
virtual ValidPathInfo queryPathInfo(const Path & path) = 0;
ref<const ValidPathInfo> queryPathInfo(const Path & path);
/* Query the hash of a valid path. */
virtual Hash queryPathHash(const Path & path) = 0;
protected:
/* Query the set of outgoing FS references for a store path. The
result is not cleared. */
virtual void queryReferences(const Path & path, PathSet & references);
virtual std::shared_ptr<ValidPathInfo> queryPathInfoUncached(const Path & path) = 0;
public:
/* Queries the set of incoming FS references for a store path.
The result is not cleared. */
virtual void queryReferrers(const Path & path,
PathSet & referrers) = 0;
/* Query the deriver of a store path. Return the empty string if
no deriver has been set. */
virtual Path queryDeriver(const Path & path) = 0;
/* Return all currently valid derivations that have `path' as an
output. (Note that the result of `queryDeriver()' is the
derivation that was actually used to produce `path', which may
@ -373,6 +388,29 @@ public:
relation. If p refers to q, then p preceeds q in this list. */
Paths topoSortPaths(const PathSet & paths);
struct Stats
{
std::atomic<uint64_t> narInfoRead{0};
std::atomic<uint64_t> narInfoReadAverted{0};
std::atomic<uint64_t> narInfoMissing{0};
std::atomic<uint64_t> narInfoWrite{0};
std::atomic<uint64_t> pathInfoCacheSize{0};
std::atomic<uint64_t> narRead{0};
std::atomic<uint64_t> narReadBytes{0};
std::atomic<uint64_t> narReadCompressedBytes{0};
std::atomic<uint64_t> narWrite{0};
std::atomic<uint64_t> narWriteAverted{0};
std::atomic<uint64_t> narWriteBytes{0};
std::atomic<uint64_t> narWriteCompressedBytes{0};
std::atomic<uint64_t> narWriteCompressionTimeMs{0};
};
const Stats & getStats();
protected:
Stats stats;
};

6
src/libstore/worker-protocol.hh
View file

@ -14,8 +14,8 @@ namespace nix {
typedef enum {
wopIsValidPath = 1,
wopHasSubstitutes = 3,
wopQueryPathHash = 4,
wopQueryReferences = 5,
wopQueryPathHash = 4, // obsolete
wopQueryReferences = 5, // obsolete
wopQueryReferrers = 6,
wopAddToStore = 7,
wopAddTextToStore = 8,
@ -26,7 +26,7 @@ typedef enum {
wopSyncWithGC = 13,
wopFindRoots = 14,
wopExportPath = 16,
wopQueryDeriver = 18,
wopQueryDeriver = 18, // obsolete
wopSetOptions = 19,
wopCollectGarbage = 20,
wopQuerySubstitutablePathInfo = 21,

6
src/libutil/lru-cache.hh
View file

@ -79,6 +79,12 @@ public:
{
return data.size();
}
void clear()
{
data.clear();
lru.clear();
}
};
}

6
src/libutil/ref.hh
View file

@ -43,6 +43,12 @@ public:
return p;
}
template<typename T2>
ref<T2> cast()
{
return ref<T2>(std::dynamic_pointer_cast<T2>(p));
}
template<typename T2>
operator ref<T2> ()
{

16
src/nix-daemon/nix-daemon.cc
View file

@ -199,7 +199,7 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
case wopQueryPathHash: {
Path path = readStorePath(from);
startWork();
Hash hash = store->queryPathHash(path);
auto hash = store->queryPathInfo(path)->narHash;
stopWork();
to << printHash(hash);
break;
@ -213,7 +213,7 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
startWork();
PathSet paths;
if (op == wopQueryReferences)
store->queryReferences(path, paths);
paths = store->queryPathInfo(path)->references;
else if (op == wopQueryReferrers)
store->queryReferrers(path, paths);
else if (op == wopQueryValidDerivers)
@ -237,7 +237,7 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
case wopQueryDeriver: {
Path path = readStorePath(from);
startWork();
Path deriver = store->queryDeriver(path);
auto deriver = store->queryPathInfo(path)->deriver;
stopWork();
to << deriver;
break;
@ -496,13 +496,13 @@ static void performOp(ref<LocalStore> store, bool trusted, unsigned int clientVe
case wopQueryPathInfo: {
Path path = readStorePath(from);
startWork();
ValidPathInfo info = store->queryPathInfo(path);
auto info = store->queryPathInfo(path);
stopWork();
to << info.deriver << printHash(info.narHash) << info.references
<< info.registrationTime << info.narSize;
to << info->deriver << printHash(info->narHash) << info->references
<< info->registrationTime << info->narSize;
if (GET_PROTOCOL_MINOR(clientVersion) >= 16) {
to << info.ultimate
<< info.sigs;
to << info->ultimate
<< info->sigs;
}
break;
}

14
src/nix-store/dotgraph.cc
View file

@ -110,19 +110,13 @@ void printDotGraph(ref<Store> store, const PathSet & roots)
cout << makeNode(path, symbolicName(path), "#ff0000");
PathSet references;
store->queryReferences(path, references);
for (PathSet::iterator i = references.begin();
i != references.end(); ++i)
{
if (*i != path) {
workList.insert(*i);
cout << makeEdge(*i, path);
for (auto & p : store->queryPathInfo(path)->references) {
if (p != path) {
workList.insert(p);
cout << makeEdge(p, path);
}
}
#if 0
StoreExpr ne = storeExprFromPath(path);

41
src/nix-store/nix-store.cc
View file

@ -51,7 +51,7 @@ ref<LocalStore> ensureLocalStore()
static Path useDeriver(Path path)
{
if (isDerivation(path)) return path;
Path drvPath = store->queryDeriver(path);
Path drvPath = store->queryPathInfo(path)->deriver;
if (drvPath == "")
throw Error(format("deriver of path ‘%1%’ is not known") % path);
return drvPath;
@ -247,8 +247,7 @@ static void printTree(const Path & path,
cout << format("%1%%2%\n") % firstPad % path;
PathSet references;
store->queryReferences(path, references);
auto references = store->queryPathInfo(path)->references;
/* Topologically sort under the relation A < B iff A \in
closure(B). That is, if derivation A is an (possibly indirect)
@ -335,7 +334,10 @@ static void opQuery(Strings opFlags, Strings opArgs)
PathSet ps = maybeUseOutputs(followLinksToStorePath(i), useOutput, forceRealise);
for (auto & j : ps) {
if (query == qRequisites) store->computeFSClosure(j, paths, false, includeOutputs);
else if (query == qReferences) store->queryReferences(j, paths);
else if (query == qReferences) {
for (auto & p : store->queryPathInfo(j)->references)
paths.insert(p);
}
else if (query == qReferrers) store->queryReferrers(j, paths);
else if (query == qReferrersClosure) store->computeFSClosure(j, paths, true);
}
@ -349,7 +351,7 @@ static void opQuery(Strings opFlags, Strings opArgs)
case qDeriver:
for (auto & i : opArgs) {
Path deriver = store->queryDeriver(followLinksToStorePath(i));
Path deriver = store->queryPathInfo(followLinksToStorePath(i))->deriver;
cout << format("%1%\n") %
(deriver == "" ? "unknown-deriver" : deriver);
}
@ -372,12 +374,12 @@ static void opQuery(Strings opFlags, Strings opArgs)
for (auto & i : opArgs) {
PathSet paths = maybeUseOutputs(followLinksToStorePath(i), useOutput, forceRealise);
for (auto & j : paths) {
ValidPathInfo info = store->queryPathInfo(j);
auto info = store->queryPathInfo(j);
if (query == qHash) {
assert(info.narHash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(info.narHash);
assert(info->narHash.type == htSHA256);
cout << format("sha256:%1%\n") % printHash32(info->narHash);
} else if (query == qSize)
cout << format("%1%\n") % info.narSize;
cout << format("%1%\n") % info->narSize;
}
}
break;
@ -782,14 +784,14 @@ static void opVerifyPath(Strings opFlags, Strings opArgs)
for (auto & i : opArgs) {
Path path = followLinksToStorePath(i);
printMsg(lvlTalkative, format("checking path ‘%1%’...") % path);
ValidPathInfo info = store->queryPathInfo(path);
HashSink sink(info.narHash.type);
auto info = store->queryPathInfo(path);
HashSink sink(info->narHash.type);
store->narFromPath(path, sink);
auto current = sink.finish();
if (current.first != info.narHash) {
if (current.first != info->narHash) {
printMsg(lvlError,
format("path ‘%1%’ was modified! expected hash ‘%2%’, got ‘%3%’")
% path % printHash(info.narHash) % printHash(current.first));
% path % printHash(info->narHash) % printHash(current.first));
status = 1;
}
}
@ -901,13 +903,14 @@ static void opServe(Strings opFlags, Strings opArgs)
PathSet paths = readStorePaths<PathSet>(in);
// !!! Maybe we want a queryPathInfos?
for (auto & i : paths) {
if (!store->isValidPath(i))
continue;
ValidPathInfo info = store->queryPathInfo(i);
out << info.path << info.deriver << info.references;
try {
auto info = store->queryPathInfo(i);
out << info->path << info->deriver << info->references;
// !!! Maybe we want compression?
out << info.narSize // downloadSize
<< info.narSize;
out << info->narSize // downloadSize
<< info->narSize;
} catch (InvalidPath &) {
}
}
out << "";
break;

13
src/nix-store/xmlgraph.cc
View file

@ -50,15 +50,10 @@ void printXmlGraph(ref<Store> store, const PathSet & roots)
cout << makeNode(path);
PathSet references;
store->queryReferences(path, references);
for (PathSet::iterator i = references.begin();
i != references.end(); ++i)
{
if (*i != path) {
workList.insert(*i);
cout << makeEdge(*i, path);
for (auto & p : store->queryPathInfo(path)->references) {
if (p != path) {
workList.insert(p);
cout << makeEdge(p, path);
}
}

22
src/nix/sigs.cc
View file

@ -64,19 +64,21 @@ struct CmdCopySigs : StorePathsCommand
StringSet newSigs;
for (auto & store2 : substituters) {
if (!store2->isValidPath(storePath)) continue;
try {
auto info2 = store2->queryPathInfo(storePath);
/* Don't import signatures that don't match this
binary. */
if (info.narHash != info2.narHash ||
info.narSize != info2.narSize ||
info.references != info2.references)
if (info->narHash != info2->narHash ||
info->narSize != info2->narSize ||
info->references != info2->references)
continue;
for (auto & sig : info2.sigs)
if (!info.sigs.count(sig))
for (auto & sig : info2->sigs)
if (!info->sigs.count(sig))
newSigs.insert(sig);
} catch (InvalidPath &) {
}
}
if (!newSigs.empty()) {
@ -122,8 +124,8 @@ struct CmdQueryPathSigs : StorePathsCommand
for (auto & storePath : storePaths) {
auto info = store->queryPathInfo(storePath);
std::cout << storePath << " ";
if (info.ultimate) std::cout << "ultimate ";
for (auto & sig : info.sigs)
if (info->ultimate) std::cout << "ultimate ";
for (auto & sig : info->sigs)
std::cout << sig << " ";
std::cout << "\n";
}
@ -163,12 +165,12 @@ struct CmdSignPaths : StorePathsCommand
for (auto & storePath : storePaths) {
auto info = store->queryPathInfo(storePath);
auto info2(info);
auto info2(*info);
info2.sigs.clear();
info2.sign(secretKey);
assert(!info2.sigs.empty());
if (!info.sigs.count(*info2.sigs.begin())) {
if (!info->sigs.count(*info2.sigs.begin())) {
store->addSignatures(storePath, info2.sigs);
added++;
}

16
src/nix/verify.cc
View file

@ -83,16 +83,16 @@ struct CmdVerify : StorePathsCommand
if (!noContents) {
HashSink sink(info.narHash.type);
HashSink sink(info->narHash.type);
store->narFromPath(storePath, sink);
auto hash = sink.finish();
if (hash.first != info.narHash) {
if (hash.first != info->narHash) {
corrupted = 1;
printMsg(lvlError,
format("path ‘%s’ was modified! expected hash ‘%s’, got ‘%s’")
% storePath % printHash(info.narHash) % printHash(hash.first));
% storePath % printHash(info->narHash) % printHash(hash.first));
}
}
@ -101,7 +101,7 @@ struct CmdVerify : StorePathsCommand
bool good = false;
if (info.ultimate && !sigsNeeded)
if (info->ultimate && !sigsNeeded)
good = true;
else {
@ -114,18 +114,18 @@ struct CmdVerify : StorePathsCommand
for (auto sig : sigs) {
if (sigsSeen.count(sig)) continue;
sigsSeen.insert(sig);
if (info.checkSignature(publicKeys, sig))
if (info->checkSignature(publicKeys, sig))
validSigs++;
}
};
doSigs(info.sigs);
doSigs(info->sigs);
for (auto & store2 : substituters) {
if (validSigs >= actualSigsNeeded) break;
try {
if (!store2->isValidPath(storePath)) continue;
doSigs(store2->queryPathInfo(storePath).sigs);
doSigs(store2->queryPathInfo(storePath)->sigs);
} catch (InvalidPath &) {
} catch (Error & e) {
printMsg(lvlError, format(ANSI_RED "error:" ANSI_NORMAL " %s") % e.what());
}