* Some wrapper objects to ensure that SQLite objects are properly
destroyed.
This commit is contained in:
Eelco Dolstra
parent
a053d2d8e5
commit
e0305bb7a8
2 changed files with 109 additions and 49 deletions
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@ -18,6 +18,8 @@
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#include <errno.h>
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#include <stdio.h>
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#include <sqlite3.h>
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namespace nix {
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@ -32,6 +34,37 @@ public:
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};
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SQLite::~SQLite()
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{
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try {
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if (db && sqlite3_close(db) != SQLITE_OK)
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throw SQLiteError(db, "closing database");
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} catch (...) {
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ignoreException();
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}
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}
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void SQLiteStmt::create(sqlite3 * db, const string & s)
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{
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assert(!stmt);
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if (sqlite3_prepare_v2(db, s.c_str(), -1, &stmt, 0) != SQLITE_OK)
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throw SQLiteError(db, "creating statement");
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this->db = db;
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}
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SQLiteStmt::~SQLiteStmt()
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{
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try {
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if (stmt && sqlite3_finalize(stmt) != SQLITE_OK)
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throw SQLiteError(db, "finalizing statement");
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} catch (...) {
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ignoreException();
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}
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}
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void checkStoreNotSymlink()
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{
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if (getEnv("NIX_IGNORE_SYMLINK_STORE") == "1") return;
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@ -52,7 +85,6 @@ void checkStoreNotSymlink()
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LocalStore::LocalStore()
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{
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db = 0;
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substitutablePathsLoaded = false;
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schemaPath = nixDBPath + "/schema";
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@ -73,6 +105,8 @@ LocalStore::LocalStore()
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checkStoreNotSymlink();
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/* Acquire the big fat lock in shared mode to make sure that no
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schema upgrade is in progress. */
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try {
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Path globalLockPath = nixDBPath + "/big-lock";
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globalLock = openLockFile(globalLockPath.c_str(), true);
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@ -87,21 +121,33 @@ LocalStore::LocalStore()
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lockFile(globalLock, ltRead, true);
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}
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/* Open the Nix database. */
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if (sqlite3_open_v2((nixDBPath + "/db.sqlite").c_str(), &db.db,
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SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
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throw Error("cannot open SQLite database");
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if (sqlite3_busy_timeout(db, 60000) != SQLITE_OK)
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throw SQLiteError(db, "setting timeout");
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/* Check the current database schema and if necessary do an
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upgrade. */
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int curSchema = getSchema();
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if (curSchema > nixSchemaVersion)
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throw Error(format("current Nix store schema is version %1%, but I only support %2%")
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% curSchema % nixSchemaVersion);
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if (curSchema == 0) { /* new store */
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curSchema = nixSchemaVersion;
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initSchema();
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writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
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}
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if (curSchema == 1) throw Error("your Nix store is no longer supported");
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if (curSchema < 5)
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else if (curSchema == 1) throw Error("your Nix store is no longer supported");
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else if (curSchema < 5)
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throw Error(
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"Your Nix store has a database in Berkeley DB format,\n"
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"which is no longer supported. To convert to the new format,\n"
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"please upgrade Nix to version 0.12 first.");
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if (curSchema < 6) upgradeStore6();
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else if (curSchema < 6) upgradeStore6();
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else prepareStatements();
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doFsync = queryBoolSetting("fsync-metadata", false);
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}
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@ -112,9 +158,6 @@ LocalStore::~LocalStore()
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try {
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flushDelayedUpdates();
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if (db && sqlite3_close(db) != SQLITE_OK)
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throw SQLiteError(db, "closing database");
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foreach (RunningSubstituters::iterator, i, runningSubstituters) {
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i->second.to.close();
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i->second.from.close();
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@ -143,15 +186,19 @@ int LocalStore::getSchema()
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void LocalStore::initSchema()
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{
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if (sqlite3_open_v2((nixDBPath + "/db.sqlite").c_str(), &db,
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SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, 0) != SQLITE_OK)
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throw Error("cannot open SQLite database");
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if (sqlite3_busy_timeout(db, 60000) != SQLITE_OK)
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throw SQLiteError(db, "sett");
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if (sqlite3_exec(db, (const char *) schema, 0, 0, 0) != SQLITE_OK)
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throw SQLiteError(db, "initialising database schema");
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prepareStatements();
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}
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void LocalStore::prepareStatements()
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{
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stmtRegisterValidPath.create(db,
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"insert into ValidPaths (path, hash, registrationTime, deriver) values (?, ?, ?, ?);");
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stmtAddReference.create(db,
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"insert into Refs (referrer, reference) values (?, ?);");
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}
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@ -1220,33 +1267,28 @@ void LocalStore::upgradeStore6()
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if (sqlite3_exec(db, "begin;", 0, 0, 0) != SQLITE_OK)
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throw SQLiteError(db, "running `begin' command");
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sqlite3_stmt * registerStmt;
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if (sqlite3_prepare_v2(db, "insert into ValidPaths (path, hash, registrationTime, deriver) values (?, ?, ?, ?);",
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-1, ®isterStmt, 0) != SQLITE_OK)
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throw SQLiteError(db, "creating statement");
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std::map<Path, sqlite3_int64> pathToId;
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foreach (PathSet::iterator, i, validPaths) {
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ValidPathInfo info = queryPathInfo(*i, true);
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if (sqlite3_reset(registerStmt) != SQLITE_OK)
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if (sqlite3_reset(stmtRegisterValidPath) != SQLITE_OK)
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throw SQLiteError(db, "resetting statement");
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if (sqlite3_bind_text(registerStmt, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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if (sqlite3_bind_text(stmtRegisterValidPath, 1, i->c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 1");
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string h = "sha256:" + printHash(info.hash);
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if (sqlite3_bind_text(registerStmt, 2, h.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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if (sqlite3_bind_text(stmtRegisterValidPath, 2, h.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 2");
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if (sqlite3_bind_int(registerStmt, 3, info.registrationTime) != SQLITE_OK)
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if (sqlite3_bind_int(stmtRegisterValidPath, 3, info.registrationTime) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 3");
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if (info.deriver != "") {
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if (sqlite3_bind_text(registerStmt, 4, info.deriver.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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if (sqlite3_bind_text(stmtRegisterValidPath, 4, info.deriver.c_str(), -1, SQLITE_TRANSIENT) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 4");
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} else {
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if (sqlite3_bind_null(registerStmt, 4) != SQLITE_OK)
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if (sqlite3_bind_null(stmtRegisterValidPath, 4) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 4");
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}
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if (sqlite3_step(registerStmt) != SQLITE_DONE)
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if (sqlite3_step(stmtRegisterValidPath) != SQLITE_DONE)
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throw SQLiteError(db, "registering valid path in database");
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pathToId[*i] = sqlite3_last_insert_rowid(db);
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@ -1254,29 +1296,21 @@ void LocalStore::upgradeStore6()
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std::cerr << ".";
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}
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if (sqlite3_finalize(registerStmt) != SQLITE_OK)
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throw SQLiteError(db, "finalizing statement");
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std::cerr << "|";
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sqlite3_stmt * addRefStmt;
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if (sqlite3_prepare_v2(db, "insert into Refs (referrer, reference) values (?, ?);",
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-1, &addRefStmt, 0) != SQLITE_OK)
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throw SQLiteError(db, "creating statement");
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foreach (PathSet::iterator, i, validPaths) {
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ValidPathInfo info = queryPathInfo(*i, true);
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foreach (PathSet::iterator, j, info.references) {
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if (sqlite3_reset(addRefStmt) != SQLITE_OK)
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if (sqlite3_reset(stmtAddReference) != SQLITE_OK)
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throw SQLiteError(db, "resetting statement");
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if (sqlite3_bind_int(addRefStmt, 1, pathToId[*i]) != SQLITE_OK)
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if (sqlite3_bind_int(stmtAddReference, 1, pathToId[*i]) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 1");
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if (pathToId.find(*j) == pathToId.end())
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throw Error(format("path `%1%' referenced by `%2%' is invalid") % *j % *i);
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if (sqlite3_bind_int(addRefStmt, 2, pathToId[*j]) != SQLITE_OK)
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if (sqlite3_bind_int(stmtAddReference, 2, pathToId[*j]) != SQLITE_OK)
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throw SQLiteError(db, "binding argument 2");
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if (sqlite3_step(addRefStmt) != SQLITE_DONE)
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if (sqlite3_step(stmtAddReference) != SQLITE_DONE)
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throw SQLiteError(db, "adding reference to database");
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}
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@ -1287,12 +1321,6 @@ void LocalStore::upgradeStore6()
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if (sqlite3_exec(db, "commit;", 0, 0, 0) != SQLITE_OK)
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throw SQLiteError(db, "running `commit' command");
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if (sqlite3_finalize(addRefStmt) != SQLITE_OK)
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throw SQLiteError(db, "finalizing statement");
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throw Error("foo");
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writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
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lockFile(globalLock, ltRead, true);
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@ -6,7 +6,9 @@
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#include "store-api.hh"
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#include "util.hh"
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#include <sqlite3.h>
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class sqlite3;
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class sqlite3_stmt;
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namespace nix {
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@ -14,8 +16,9 @@ namespace nix {
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/* Nix store and database schema version. Version 1 (or 0) was Nix <=
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0.7. Version 2 was Nix 0.8 and 0.9. Version 3 is Nix 0.10.
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Version 4 is Nix 0.11. Version 5 is Nix 0.12*/
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const int nixSchemaVersion = 5;
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Version 4 is Nix 0.11. Version 5 is Nix 0.12-0.14. Version 6 is
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Nix 0.15. */
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const int nixSchemaVersion = 6;
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extern string drvsLogDir;
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@ -43,6 +46,28 @@ struct RunningSubstituter
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};
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/* Wrapper object to close the SQLite database automatically. */
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struct SQLite
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{
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sqlite3 * db;
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SQLite() { db = 0; }
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~SQLite();
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operator sqlite3 * () { return db; }
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};
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/* Wrapper object to create and destroy SQLite prepared statements. */
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struct SQLiteStmt
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{
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sqlite3 * db;
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sqlite3_stmt * stmt;
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SQLiteStmt() { stmt = 0; }
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void create(sqlite3 * db, const string & s);
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~SQLiteStmt();
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operator sqlite3_stmt * () { return stmt; }
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};
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class LocalStore : public StoreAPI
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{
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private:
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@ -163,12 +188,19 @@ private:
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/* Whether to do an fsync() after writing Nix metadata. */
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bool doFsync;
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sqlite3 * db;
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/* The SQLite database object. */
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SQLite db;
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/* Some precompiled SQLite statements. */
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SQLiteStmt stmtRegisterValidPath;
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SQLiteStmt stmtAddReference;
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int getSchema();
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void initSchema();
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void prepareStatements();
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void registerValidPath(const ValidPathInfo & info, bool ignoreValidity = false);
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ValidPathInfo queryPathInfo(const Path & path, bool ignoreErrors = false);
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