forked from lix-project/lix
450 lines
14 KiB
C++
450 lines
14 KiB
C++
#include "archive.hh"
|
||
#include "binary-cache-store.hh"
|
||
#include "compression.hh"
|
||
#include "derivations.hh"
|
||
#include "fs-accessor.hh"
|
||
#include "globals.hh"
|
||
#include "nar-info.hh"
|
||
#include "sync.hh"
|
||
#include "remote-fs-accessor.hh"
|
||
#include "nar-info-disk-cache.hh"
|
||
#include "nar-accessor.hh"
|
||
#include "json.hh"
|
||
#include "thread-pool.hh"
|
||
|
||
#include <chrono>
|
||
#include <future>
|
||
#include <regex>
|
||
#include <fstream>
|
||
|
||
#include <nlohmann/json.hpp>
|
||
|
||
namespace nix {
|
||
|
||
BinaryCacheStore::BinaryCacheStore(const Params & params)
|
||
: Store(params)
|
||
{
|
||
if (secretKeyFile != "")
|
||
secretKey = std::unique_ptr<SecretKey>(new SecretKey(readFile(secretKeyFile)));
|
||
|
||
StringSink sink;
|
||
sink << narVersionMagic1;
|
||
narMagic = *sink.s;
|
||
}
|
||
|
||
void BinaryCacheStore::init()
|
||
{
|
||
std::string cacheInfoFile = "nix-cache-info";
|
||
|
||
auto cacheInfo = getFile(cacheInfoFile);
|
||
if (!cacheInfo) {
|
||
upsertFile(cacheInfoFile, "StoreDir: " + storeDir + "\n", "text/x-nix-cache-info");
|
||
} else {
|
||
for (auto & line : tokenizeString<Strings>(*cacheInfo, "\n")) {
|
||
size_t colon= line.find(':');
|
||
if (colon ==std::string::npos) continue;
|
||
auto name = line.substr(0, colon);
|
||
auto value = trim(line.substr(colon + 1, std::string::npos));
|
||
if (name == "StoreDir") {
|
||
if (value != storeDir)
|
||
throw Error("binary cache '%s' is for Nix stores with prefix '%s', not '%s'",
|
||
getUri(), value, storeDir);
|
||
} else if (name == "WantMassQuery") {
|
||
wantMassQuery.setDefault(value == "1" ? "true" : "false");
|
||
} else if (name == "Priority") {
|
||
priority.setDefault(fmt("%d", std::stoi(value)));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void BinaryCacheStore::upsertFile(const std::string & path,
|
||
std::string && data,
|
||
const std::string & mimeType)
|
||
{
|
||
upsertFile(path, std::make_shared<std::stringstream>(std::move(data)), mimeType);
|
||
}
|
||
|
||
void BinaryCacheStore::getFile(const std::string & path,
|
||
Callback<std::shared_ptr<std::string>> callback) noexcept
|
||
{
|
||
try {
|
||
callback(getFile(path));
|
||
} catch (...) { callback.rethrow(); }
|
||
}
|
||
|
||
void BinaryCacheStore::getFile(const std::string & path, Sink & sink)
|
||
{
|
||
std::promise<std::shared_ptr<std::string>> promise;
|
||
getFile(path,
|
||
{[&](std::future<std::shared_ptr<std::string>> result) {
|
||
try {
|
||
promise.set_value(result.get());
|
||
} catch (...) {
|
||
promise.set_exception(std::current_exception());
|
||
}
|
||
}});
|
||
auto data = promise.get_future().get();
|
||
sink((unsigned char *) data->data(), data->size());
|
||
}
|
||
|
||
std::shared_ptr<std::string> BinaryCacheStore::getFile(const std::string & path)
|
||
{
|
||
StringSink sink;
|
||
try {
|
||
getFile(path, sink);
|
||
} catch (NoSuchBinaryCacheFile &) {
|
||
return nullptr;
|
||
}
|
||
return sink.s;
|
||
}
|
||
|
||
std::string BinaryCacheStore::narInfoFileFor(const StorePath & storePath)
|
||
{
|
||
return std::string(storePath.hashPart()) + ".narinfo";
|
||
}
|
||
|
||
void BinaryCacheStore::writeNarInfo(ref<NarInfo> narInfo)
|
||
{
|
||
auto narInfoFile = narInfoFileFor(narInfo->path);
|
||
|
||
upsertFile(narInfoFile, narInfo->to_string(*this), "text/x-nix-narinfo");
|
||
|
||
std::string hashPart(narInfo->path.hashPart());
|
||
|
||
{
|
||
auto state_(state.lock());
|
||
state_->pathInfoCache.upsert(hashPart, PathInfoCacheValue { .value = std::shared_ptr<NarInfo>(narInfo) });
|
||
}
|
||
|
||
if (diskCache)
|
||
diskCache->upsertNarInfo(getUri(), hashPart, std::shared_ptr<NarInfo>(narInfo));
|
||
}
|
||
|
||
AutoCloseFD openFile(const Path & path)
|
||
{
|
||
auto fd = open(path.c_str(), O_RDONLY | O_CLOEXEC);
|
||
if (!fd)
|
||
throw SysError("opening file '%1%'", path);
|
||
return fd;
|
||
}
|
||
|
||
struct FileSource : FdSource
|
||
{
|
||
AutoCloseFD fd2;
|
||
|
||
FileSource(const Path & path)
|
||
: fd2(openFile(path))
|
||
{
|
||
fd = fd2.get();
|
||
}
|
||
};
|
||
|
||
void BinaryCacheStore::addToStore(const ValidPathInfo & info, Source & narSource,
|
||
RepairFlag repair, CheckSigsFlag checkSigs)
|
||
{
|
||
assert(info.narHash && info.narSize);
|
||
|
||
if (!repair && isValidPath(info.path)) {
|
||
// FIXME: copyNAR -> null sink
|
||
narSource.drain();
|
||
return;
|
||
}
|
||
|
||
auto [fdTemp, fnTemp] = createTempFile();
|
||
|
||
auto now1 = std::chrono::steady_clock::now();
|
||
|
||
/* Read the NAR simultaneously into a CompressionSink+FileSink (to
|
||
write the compressed NAR to disk), into a HashSink (to get the
|
||
NAR hash), and into a NarAccessor (to get the NAR listing). */
|
||
HashSink fileHashSink(htSHA256);
|
||
std::shared_ptr<FSAccessor> narAccessor;
|
||
{
|
||
FdSink fileSink(fdTemp.get());
|
||
TeeSink teeSink(fileSink, fileHashSink);
|
||
auto compressionSink = makeCompressionSink(compression, teeSink);
|
||
TeeSource teeSource(narSource, *compressionSink);
|
||
narAccessor = makeNarAccessor(teeSource);
|
||
compressionSink->finish();
|
||
}
|
||
|
||
auto now2 = std::chrono::steady_clock::now();
|
||
|
||
auto narInfo = make_ref<NarInfo>(info);
|
||
narInfo->narSize = info.narSize;
|
||
narInfo->narHash = info.narHash;
|
||
narInfo->compression = compression;
|
||
auto [fileHash, fileSize] = fileHashSink.finish();
|
||
narInfo->fileHash = fileHash;
|
||
narInfo->fileSize = fileSize;
|
||
narInfo->url = "nar/" + narInfo->fileHash.to_string(Base32, false) + ".nar"
|
||
+ (compression == "xz" ? ".xz" :
|
||
compression == "bzip2" ? ".bz2" :
|
||
compression == "br" ? ".br" :
|
||
"");
|
||
|
||
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1).count();
|
||
printMsg(lvlTalkative, "copying path '%1%' (%2% bytes, compressed %3$.1f%% in %4% ms) to binary cache",
|
||
printStorePath(narInfo->path), info.narSize,
|
||
((1.0 - (double) fileSize / info.narSize) * 100.0),
|
||
duration);
|
||
|
||
/* Verify that all references are valid. This may do some .narinfo
|
||
reads, but typically they'll already be cached. */
|
||
for (auto & ref : info.references)
|
||
try {
|
||
if (ref != info.path)
|
||
queryPathInfo(ref);
|
||
} catch (InvalidPath &) {
|
||
throw Error("cannot add '%s' to the binary cache because the reference '%s' is not valid",
|
||
printStorePath(info.path), printStorePath(ref));
|
||
}
|
||
|
||
/* Optionally write a JSON file containing a listing of the
|
||
contents of the NAR. */
|
||
if (writeNARListing) {
|
||
std::ostringstream jsonOut;
|
||
|
||
{
|
||
JSONObject jsonRoot(jsonOut);
|
||
jsonRoot.attr("version", 1);
|
||
|
||
{
|
||
auto res = jsonRoot.placeholder("root");
|
||
listNar(res, ref<FSAccessor>(narAccessor), "", true);
|
||
}
|
||
}
|
||
|
||
upsertFile(std::string(info.path.to_string()) + ".ls", jsonOut.str(), "application/json");
|
||
}
|
||
|
||
/* Optionally maintain an index of DWARF debug info files
|
||
consisting of JSON files named 'debuginfo/<build-id>' that
|
||
specify the NAR file and member containing the debug info. */
|
||
if (writeDebugInfo) {
|
||
|
||
std::string buildIdDir = "/lib/debug/.build-id";
|
||
|
||
if (narAccessor->stat(buildIdDir).type == FSAccessor::tDirectory) {
|
||
|
||
ThreadPool threadPool(25);
|
||
|
||
auto doFile = [&](std::string member, std::string key, std::string target) {
|
||
checkInterrupt();
|
||
|
||
nlohmann::json json;
|
||
json["archive"] = target;
|
||
json["member"] = member;
|
||
|
||
// FIXME: or should we overwrite? The previous link may point
|
||
// to a GC'ed file, so overwriting might be useful...
|
||
if (fileExists(key)) return;
|
||
|
||
printMsg(lvlTalkative, "creating debuginfo link from '%s' to '%s'", key, target);
|
||
|
||
upsertFile(key, json.dump(), "application/json");
|
||
};
|
||
|
||
std::regex regex1("^[0-9a-f]{2}$");
|
||
std::regex regex2("^[0-9a-f]{38}\\.debug$");
|
||
|
||
for (auto & s1 : narAccessor->readDirectory(buildIdDir)) {
|
||
auto dir = buildIdDir + "/" + s1;
|
||
|
||
if (narAccessor->stat(dir).type != FSAccessor::tDirectory
|
||
|| !std::regex_match(s1, regex1))
|
||
continue;
|
||
|
||
for (auto & s2 : narAccessor->readDirectory(dir)) {
|
||
auto debugPath = dir + "/" + s2;
|
||
|
||
if (narAccessor->stat(debugPath).type != FSAccessor::tRegular
|
||
|| !std::regex_match(s2, regex2))
|
||
continue;
|
||
|
||
auto buildId = s1 + s2;
|
||
|
||
std::string key = "debuginfo/" + buildId;
|
||
std::string target = "../" + narInfo->url;
|
||
|
||
threadPool.enqueue(std::bind(doFile, std::string(debugPath, 1), key, target));
|
||
}
|
||
}
|
||
|
||
threadPool.process();
|
||
}
|
||
}
|
||
|
||
/* Atomically write the NAR file. */
|
||
if (repair || !fileExists(narInfo->url)) {
|
||
stats.narWrite++;
|
||
upsertFile(narInfo->url,
|
||
std::make_shared<std::fstream>(fnTemp, std::ios_base::in),
|
||
"application/x-nix-nar");
|
||
} else
|
||
stats.narWriteAverted++;
|
||
|
||
stats.narWriteBytes += info.narSize;
|
||
stats.narWriteCompressedBytes += fileSize;
|
||
stats.narWriteCompressionTimeMs += duration;
|
||
|
||
/* Atomically write the NAR info file.*/
|
||
if (secretKey) narInfo->sign(*this, *secretKey);
|
||
|
||
writeNarInfo(narInfo);
|
||
|
||
stats.narInfoWrite++;
|
||
}
|
||
|
||
bool BinaryCacheStore::isValidPathUncached(const StorePath & storePath)
|
||
{
|
||
// 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.
|
||
return fileExists(narInfoFileFor(storePath));
|
||
}
|
||
|
||
void BinaryCacheStore::narFromPath(const StorePath & storePath, Sink & sink)
|
||
{
|
||
auto info = queryPathInfo(storePath).cast<const NarInfo>();
|
||
|
||
uint64_t narSize = 0;
|
||
|
||
LambdaSink wrapperSink([&](const unsigned char * data, size_t len) {
|
||
sink(data, len);
|
||
narSize += len;
|
||
});
|
||
|
||
auto decompressor = makeDecompressionSink(info->compression, wrapperSink);
|
||
|
||
try {
|
||
getFile(info->url, *decompressor);
|
||
} catch (NoSuchBinaryCacheFile & e) {
|
||
throw SubstituteGone(e.info());
|
||
}
|
||
|
||
decompressor->finish();
|
||
|
||
stats.narRead++;
|
||
//stats.narReadCompressedBytes += nar->size(); // FIXME
|
||
stats.narReadBytes += narSize;
|
||
}
|
||
|
||
void BinaryCacheStore::queryPathInfoUncached(const StorePath & storePath,
|
||
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept
|
||
{
|
||
auto uri = getUri();
|
||
auto storePathS = printStorePath(storePath);
|
||
auto act = std::make_shared<Activity>(*logger, lvlTalkative, actQueryPathInfo,
|
||
fmt("querying info about '%s' on '%s'", storePathS, uri), Logger::Fields{storePathS, uri});
|
||
PushActivity pact(act->id);
|
||
|
||
auto narInfoFile = narInfoFileFor(storePath);
|
||
|
||
auto callbackPtr = std::make_shared<decltype(callback)>(std::move(callback));
|
||
|
||
getFile(narInfoFile,
|
||
{[=](std::future<std::shared_ptr<std::string>> fut) {
|
||
try {
|
||
auto data = fut.get();
|
||
|
||
if (!data) return (*callbackPtr)(nullptr);
|
||
|
||
stats.narInfoRead++;
|
||
|
||
(*callbackPtr)((std::shared_ptr<ValidPathInfo>)
|
||
std::make_shared<NarInfo>(*this, *data, narInfoFile));
|
||
|
||
(void) act; // force Activity into this lambda to ensure it stays alive
|
||
} catch (...) {
|
||
callbackPtr->rethrow();
|
||
}
|
||
}});
|
||
}
|
||
|
||
StorePath BinaryCacheStore::addToStore(const string & name, const Path & srcPath,
|
||
FileIngestionMethod method, HashType hashAlgo, PathFilter & filter, RepairFlag repair)
|
||
{
|
||
// FIXME: some cut&paste from LocalStore::addToStore().
|
||
|
||
/* Read the whole path into memory. This is not a very scalable
|
||
method for very large paths, but `copyPath' is mainly used for
|
||
small files. */
|
||
StringSink sink;
|
||
Hash h;
|
||
if (method == FileIngestionMethod::Recursive) {
|
||
dumpPath(srcPath, sink, filter);
|
||
h = hashString(hashAlgo, *sink.s);
|
||
} else {
|
||
auto s = readFile(srcPath);
|
||
dumpString(s, sink);
|
||
h = hashString(hashAlgo, s);
|
||
}
|
||
|
||
ValidPathInfo info(makeFixedOutputPath(method, h, name));
|
||
|
||
auto source = StringSource { *sink.s };
|
||
addToStore(info, source, repair, CheckSigs);
|
||
|
||
return std::move(info.path);
|
||
}
|
||
|
||
StorePath BinaryCacheStore::addTextToStore(const string & name, const string & s,
|
||
const StorePathSet & references, RepairFlag repair)
|
||
{
|
||
ValidPathInfo info(computeStorePathForText(name, s, references));
|
||
info.references = references;
|
||
|
||
if (repair || !isValidPath(info.path)) {
|
||
StringSink sink;
|
||
dumpString(s, sink);
|
||
auto source = StringSource { *sink.s };
|
||
addToStore(info, source, repair, CheckSigs);
|
||
}
|
||
|
||
return std::move(info.path);
|
||
}
|
||
|
||
ref<FSAccessor> BinaryCacheStore::getFSAccessor()
|
||
{
|
||
return make_ref<RemoteFSAccessor>(ref<Store>(shared_from_this()), localNarCache);
|
||
}
|
||
|
||
void BinaryCacheStore::addSignatures(const StorePath & storePath, const StringSet & sigs)
|
||
{
|
||
/* Note: this is inherently racy since there is no locking on
|
||
binary caches. In particular, with S3 this unreliable, even
|
||
when addSignatures() is called sequentially on a path, because
|
||
S3 might return an outdated cached version. */
|
||
|
||
auto narInfo = make_ref<NarInfo>((NarInfo &) *queryPathInfo(storePath));
|
||
|
||
narInfo->sigs.insert(sigs.begin(), sigs.end());
|
||
|
||
writeNarInfo(narInfo);
|
||
}
|
||
|
||
std::shared_ptr<std::string> BinaryCacheStore::getBuildLog(const StorePath & path)
|
||
{
|
||
auto drvPath = path;
|
||
|
||
if (!path.isDerivation()) {
|
||
try {
|
||
auto info = queryPathInfo(path);
|
||
// FIXME: add a "Log" field to .narinfo
|
||
if (!info->deriver) return nullptr;
|
||
drvPath = *info->deriver;
|
||
} catch (InvalidPath &) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
|
||
auto logPath = "log/" + std::string(baseNameOf(printStorePath(drvPath)));
|
||
|
||
debug("fetching build log from binary cache '%s/%s'", getUri(), logPath);
|
||
|
||
return getFile(logPath);
|
||
}
|
||
|
||
}
|