forked from lix-project/lix
87c8d3d702
Once a build is done, get back to the original derivation, and register all the newly built outputs for this derivation. This allows Nix to work properly with derivations that don't have all their build inputs available − thus allowing garbage collection and (once it's implemented) binary substitution
308 lines
9.3 KiB
C++
308 lines
9.3 KiB
C++
#pragma once
|
||
|
||
#include "sqlite.hh"
|
||
|
||
#include "pathlocks.hh"
|
||
#include "store-api.hh"
|
||
#include "local-fs-store.hh"
|
||
#include "sync.hh"
|
||
#include "util.hh"
|
||
|
||
#include <chrono>
|
||
#include <future>
|
||
#include <string>
|
||
#include <unordered_set>
|
||
|
||
|
||
namespace nix {
|
||
|
||
|
||
/* Nix store and database schema version. Version 1 (or 0) was Nix <=
|
||
0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
|
||
Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.16. Version 6 is
|
||
Nix 1.0. Version 7 is Nix 1.3. Version 10 is 2.0. */
|
||
const int nixSchemaVersion = 10;
|
||
|
||
|
||
struct OptimiseStats
|
||
{
|
||
unsigned long filesLinked = 0;
|
||
uint64_t bytesFreed = 0;
|
||
uint64_t blocksFreed = 0;
|
||
};
|
||
|
||
struct LocalStoreConfig : virtual LocalFSStoreConfig
|
||
{
|
||
using LocalFSStoreConfig::LocalFSStoreConfig;
|
||
|
||
Setting<bool> requireSigs{(StoreConfig*) this,
|
||
settings.requireSigs,
|
||
"require-sigs", "whether store paths should have a trusted signature on import"};
|
||
|
||
const std::string name() override { return "Local Store"; }
|
||
};
|
||
|
||
|
||
class LocalStore : public virtual LocalStoreConfig, public virtual LocalFSStore
|
||
{
|
||
private:
|
||
|
||
/* Lock file used for upgrading. */
|
||
AutoCloseFD globalLock;
|
||
|
||
struct State
|
||
{
|
||
/* The SQLite database object. */
|
||
SQLite db;
|
||
|
||
struct Stmts;
|
||
std::unique_ptr<Stmts> stmts;
|
||
|
||
/* The file to which we write our temporary roots. */
|
||
AutoCloseFD fdTempRoots;
|
||
|
||
/* The last time we checked whether to do an auto-GC, or an
|
||
auto-GC finished. */
|
||
std::chrono::time_point<std::chrono::steady_clock> lastGCCheck;
|
||
|
||
/* Whether auto-GC is running. If so, get gcFuture to wait for
|
||
the GC to finish. */
|
||
bool gcRunning = false;
|
||
std::shared_future<void> gcFuture;
|
||
|
||
/* How much disk space was available after the previous
|
||
auto-GC. If the current available disk space is below
|
||
minFree but not much below availAfterGC, then there is no
|
||
point in starting a new GC. */
|
||
uint64_t availAfterGC = std::numeric_limits<uint64_t>::max();
|
||
|
||
std::unique_ptr<PublicKeys> publicKeys;
|
||
};
|
||
|
||
Sync<State> _state;
|
||
|
||
public:
|
||
|
||
PathSetting realStoreDir_;
|
||
|
||
const Path realStoreDir;
|
||
const Path dbDir;
|
||
const Path linksDir;
|
||
const Path reservedPath;
|
||
const Path schemaPath;
|
||
const Path trashDir;
|
||
const Path tempRootsDir;
|
||
const Path fnTempRoots;
|
||
|
||
private:
|
||
|
||
const PublicKeys & getPublicKeys();
|
||
|
||
public:
|
||
|
||
// Hack for build-remote.cc.
|
||
PathSet locksHeld;
|
||
|
||
/* Initialise the local store, upgrading the schema if
|
||
necessary. */
|
||
LocalStore(const Params & params);
|
||
|
||
~LocalStore();
|
||
|
||
/* Implementations of abstract store API methods. */
|
||
|
||
std::string getUri() override;
|
||
|
||
bool isValidPathUncached(const StorePath & path) override;
|
||
|
||
StorePathSet queryValidPaths(const StorePathSet & paths,
|
||
SubstituteFlag maybeSubstitute = NoSubstitute) override;
|
||
|
||
StorePathSet queryAllValidPaths() override;
|
||
|
||
void queryPathInfoUncached(const StorePath & path,
|
||
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept override;
|
||
|
||
void queryReferrers(const StorePath & path, StorePathSet & referrers) override;
|
||
|
||
StorePathSet queryValidDerivers(const StorePath & path) override;
|
||
|
||
std::map<std::string, std::optional<StorePath>> queryPartialDerivationOutputMap(const StorePath & path) override;
|
||
|
||
std::optional<StorePath> queryPathFromHashPart(const std::string & hashPart) override;
|
||
|
||
StorePathSet querySubstitutablePaths(const StorePathSet & paths) override;
|
||
|
||
void querySubstitutablePathInfos(const StorePathCAMap & paths,
|
||
SubstitutablePathInfos & infos) override;
|
||
|
||
bool pathInfoIsTrusted(const ValidPathInfo &) override;
|
||
|
||
void addToStore(const ValidPathInfo & info, Source & source,
|
||
RepairFlag repair, CheckSigsFlag checkSigs) override;
|
||
|
||
StorePath addToStoreFromDump(Source & dump, const string & name,
|
||
FileIngestionMethod method, HashType hashAlgo, RepairFlag repair) override;
|
||
|
||
StorePath addTextToStore(const string & name, const string & s,
|
||
const StorePathSet & references, RepairFlag repair) override;
|
||
|
||
void addTempRoot(const StorePath & path) override;
|
||
|
||
void addIndirectRoot(const Path & path) override;
|
||
|
||
void syncWithGC() override;
|
||
|
||
private:
|
||
|
||
typedef std::shared_ptr<AutoCloseFD> FDPtr;
|
||
typedef list<FDPtr> FDs;
|
||
|
||
void findTempRoots(FDs & fds, Roots & roots, bool censor);
|
||
|
||
public:
|
||
|
||
Roots findRoots(bool censor) override;
|
||
|
||
void collectGarbage(const GCOptions & options, GCResults & results) override;
|
||
|
||
/* Optimise the disk space usage of the Nix store by hard-linking
|
||
files with the same contents. */
|
||
void optimiseStore(OptimiseStats & stats);
|
||
|
||
void optimiseStore() override;
|
||
|
||
/* Optimise a single store path. */
|
||
void optimisePath(const Path & path);
|
||
|
||
bool verifyStore(bool checkContents, RepairFlag repair) override;
|
||
|
||
/* Register the validity of a path, i.e., that `path' exists, that
|
||
the paths referenced by it exists, and in the case of an output
|
||
path of a derivation, that it has been produced by a successful
|
||
execution of the derivation (or something equivalent). Also
|
||
register the hash of the file system contents of the path. The
|
||
hash must be a SHA-256 hash. */
|
||
void registerValidPath(const ValidPathInfo & info);
|
||
|
||
void registerValidPaths(const ValidPathInfos & infos);
|
||
|
||
unsigned int getProtocol() override;
|
||
|
||
void vacuumDB();
|
||
|
||
void repairPath(const StorePath & path) override;
|
||
|
||
void addSignatures(const StorePath & storePath, const StringSet & sigs) override;
|
||
|
||
/* If free disk space in /nix/store if below minFree, delete
|
||
garbage until it exceeds maxFree. */
|
||
void autoGC(bool sync = true);
|
||
|
||
/* Register the store path 'output' as the output named 'outputName' of
|
||
derivation 'deriver'. */
|
||
void registerDrvOutput(const Realisation & info) override;
|
||
void cacheDrvOutputMapping(State & state, const uint64_t deriver, const string & outputName, const StorePath & output);
|
||
|
||
std::optional<const Realisation> queryRealisation(const DrvOutput&) override;
|
||
|
||
private:
|
||
|
||
int getSchema();
|
||
|
||
void openDB(State & state, bool create);
|
||
|
||
void makeStoreWritable();
|
||
|
||
uint64_t queryValidPathId(State & state, const StorePath & path);
|
||
|
||
uint64_t addValidPath(State & state, const ValidPathInfo & info, bool checkOutputs = true);
|
||
|
||
void invalidatePath(State & state, const StorePath & path);
|
||
|
||
/* Delete a path from the Nix store. */
|
||
void invalidatePathChecked(const StorePath & path);
|
||
|
||
void verifyPath(const Path & path, const StringSet & store,
|
||
PathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors);
|
||
|
||
std::shared_ptr<const ValidPathInfo> queryPathInfoInternal(State & state, const StorePath & path);
|
||
|
||
void updatePathInfo(State & state, const ValidPathInfo & info);
|
||
|
||
void upgradeStore6();
|
||
void upgradeStore7();
|
||
PathSet queryValidPathsOld();
|
||
ValidPathInfo queryPathInfoOld(const Path & path);
|
||
|
||
struct GCState;
|
||
|
||
void deleteGarbage(GCState & state, const Path & path);
|
||
|
||
void tryToDelete(GCState & state, const Path & path);
|
||
|
||
bool canReachRoot(GCState & state, StorePathSet & visited, const StorePath & path);
|
||
|
||
void deletePathRecursive(GCState & state, const Path & path);
|
||
|
||
bool isActiveTempFile(const GCState & state,
|
||
const Path & path, const string & suffix);
|
||
|
||
AutoCloseFD openGCLock(LockType lockType);
|
||
|
||
void findRoots(const Path & path, unsigned char type, Roots & roots);
|
||
|
||
void findRootsNoTemp(Roots & roots, bool censor);
|
||
|
||
void findRuntimeRoots(Roots & roots, bool censor);
|
||
|
||
void removeUnusedLinks(const GCState & state);
|
||
|
||
Path createTempDirInStore();
|
||
|
||
void checkDerivationOutputs(const StorePath & drvPath, const Derivation & drv);
|
||
|
||
typedef std::unordered_set<ino_t> InodeHash;
|
||
|
||
InodeHash loadInodeHash();
|
||
Strings readDirectoryIgnoringInodes(const Path & path, const InodeHash & inodeHash);
|
||
void optimisePath_(Activity * act, OptimiseStats & stats, const Path & path, InodeHash & inodeHash);
|
||
|
||
// Internal versions that are not wrapped in retry_sqlite.
|
||
bool isValidPath_(State & state, const StorePath & path);
|
||
void queryReferrers(State & state, const StorePath & path, StorePathSet & referrers);
|
||
|
||
/* Add signatures to a ValidPathInfo using the secret keys
|
||
specified by the ‘secret-key-files’ option. */
|
||
void signPathInfo(ValidPathInfo & info);
|
||
|
||
Path getRealStoreDir() override { return realStoreDir; }
|
||
|
||
void createUser(const std::string & userName, uid_t userId) override;
|
||
|
||
friend struct DerivationGoal;
|
||
friend struct SubstitutionGoal;
|
||
};
|
||
|
||
|
||
typedef std::pair<dev_t, ino_t> Inode;
|
||
typedef set<Inode> InodesSeen;
|
||
|
||
|
||
/* "Fix", or canonicalise, the meta-data of the files in a store path
|
||
after it has been built. In particular:
|
||
- the last modification date on each file is set to 1 (i.e.,
|
||
00:00:01 1/1/1970 UTC)
|
||
- the permissions are set of 444 or 555 (i.e., read-only with or
|
||
without execute permission; setuid bits etc. are cleared)
|
||
- the owner and group are set to the Nix user and group, if we're
|
||
running as root. */
|
||
void canonicalisePathMetaData(const Path & path, uid_t fromUid, InodesSeen & inodesSeen);
|
||
void canonicalisePathMetaData(const Path & path, uid_t fromUid);
|
||
|
||
void canonicaliseTimestampAndPermissions(const Path & path);
|
||
|
||
MakeError(PathInUse, Error);
|
||
|
||
}
|