forked from lix-project/lix
34f25124ba
This reduces memory consumption of
nix-instantiate \
-E 'with import <nixpkgs> {}; runCommand "foo" { src = ./blender; } "echo foo"' \
--option nar-buffer-size 10000
(where ./blender is a 1.1 GiB tree) from 1716 to 36 MiB, while still
ensuring that we don't do any write I/O for small source paths (up to
'nar-buffer-size' bytes). The downside is that large paths are now
always written to a temporary location in the store, even if they
produce an already valid store path. Thus, adding large paths might be
slower and run out of disk space. ¯\_(ツ)_/¯ Of course, you can always
restore the old behaviour by setting 'nar-buffer-size' to a very high
value.
1586 lines
51 KiB
C++
1586 lines
51 KiB
C++
#include "local-store.hh"
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#include "globals.hh"
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#include "archive.hh"
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#include "pathlocks.hh"
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#include "worker-protocol.hh"
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#include "derivations.hh"
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#include "nar-info.hh"
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#include "references.hh"
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#include <iostream>
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#include <algorithm>
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#include <cstring>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <utime.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <time.h>
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#include <grp.h>
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#if __linux__
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#include <sched.h>
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#include <sys/statvfs.h>
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#include <sys/mount.h>
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#include <sys/ioctl.h>
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#include <sys/xattr.h>
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#endif
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#ifdef __CYGWIN__
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#include <windows.h>
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#endif
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#include <sqlite3.h>
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namespace nix {
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LocalStore::LocalStore(const Params & params)
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: Store(params)
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, LocalFSStore(params)
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, realStoreDir_{this, false, rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
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"physical path to the Nix store"}
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, realStoreDir(realStoreDir_)
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, dbDir(stateDir + "/db")
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, linksDir(realStoreDir + "/.links")
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, reservedPath(dbDir + "/reserved")
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, schemaPath(dbDir + "/schema")
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, trashDir(realStoreDir + "/trash")
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, tempRootsDir(stateDir + "/temproots")
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, fnTempRoots(fmt("%s/%d", tempRootsDir, getpid()))
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, locksHeld(tokenizeString<PathSet>(getEnv("NIX_HELD_LOCKS").value_or("")))
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{
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auto state(_state.lock());
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/* Create missing state directories if they don't already exist. */
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createDirs(realStoreDir);
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makeStoreWritable();
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createDirs(linksDir);
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Path profilesDir = stateDir + "/profiles";
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createDirs(profilesDir);
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createDirs(tempRootsDir);
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createDirs(dbDir);
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Path gcRootsDir = stateDir + "/gcroots";
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if (!pathExists(gcRootsDir)) {
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createDirs(gcRootsDir);
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createSymlink(profilesDir, gcRootsDir + "/profiles");
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}
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for (auto & perUserDir : {profilesDir + "/per-user", gcRootsDir + "/per-user"}) {
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createDirs(perUserDir);
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if (chmod(perUserDir.c_str(), 0755) == -1)
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throw SysError("could not set permissions on '%s' to 755", perUserDir);
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}
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createUser(getUserName(), getuid());
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/* Optionally, create directories and set permissions for a
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multi-user install. */
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if (getuid() == 0 && settings.buildUsersGroup != "") {
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mode_t perm = 01775;
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struct group * gr = getgrnam(settings.buildUsersGroup.get().c_str());
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if (!gr)
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logError({
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.name = "'build-users-group' not found",
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.hint = hintfmt(
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"warning: the group '%1%' specified in 'build-users-group' does not exist",
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settings.buildUsersGroup)
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});
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else {
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struct stat st;
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if (stat(realStoreDir.c_str(), &st))
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throw SysError("getting attributes of path '%1%'", realStoreDir);
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if (st.st_uid != 0 || st.st_gid != gr->gr_gid || (st.st_mode & ~S_IFMT) != perm) {
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if (chown(realStoreDir.c_str(), 0, gr->gr_gid) == -1)
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throw SysError("changing ownership of path '%1%'", realStoreDir);
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if (chmod(realStoreDir.c_str(), perm) == -1)
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throw SysError("changing permissions on path '%1%'", realStoreDir);
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}
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}
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}
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/* Ensure that the store and its parents are not symlinks. */
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if (getEnv("NIX_IGNORE_SYMLINK_STORE") != "1") {
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Path path = realStoreDir;
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struct stat st;
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while (path != "/") {
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if (lstat(path.c_str(), &st))
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throw SysError("getting status of '%1%'", path);
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if (S_ISLNK(st.st_mode))
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throw Error(
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"the path '%1%' is a symlink; "
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"this is not allowed for the Nix store and its parent directories",
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path);
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path = dirOf(path);
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}
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}
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/* We can't open a SQLite database if the disk is full. Since
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this prevents the garbage collector from running when it's most
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needed, we reserve some dummy space that we can free just
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before doing a garbage collection. */
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try {
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struct stat st;
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if (stat(reservedPath.c_str(), &st) == -1 ||
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st.st_size != settings.reservedSize)
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{
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AutoCloseFD fd = open(reservedPath.c_str(), O_WRONLY | O_CREAT | O_CLOEXEC, 0600);
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int res = -1;
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#if HAVE_POSIX_FALLOCATE
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res = posix_fallocate(fd.get(), 0, settings.reservedSize);
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#endif
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if (res == -1) {
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writeFull(fd.get(), string(settings.reservedSize, 'X'));
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[[gnu::unused]] auto res2 = ftruncate(fd.get(), settings.reservedSize);
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}
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}
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} catch (SysError & e) { /* don't care about errors */
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}
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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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Path globalLockPath = dbDir + "/big-lock";
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globalLock = openLockFile(globalLockPath.c_str(), true);
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if (!lockFile(globalLock.get(), ltRead, false)) {
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printInfo("waiting for the big Nix store lock...");
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lockFile(globalLock.get(), ltRead, true);
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}
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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("current Nix store schema is version %1%, but I only support %2%",
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curSchema, nixSchemaVersion);
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else if (curSchema == 0) { /* new store */
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curSchema = nixSchemaVersion;
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openDB(*state, true);
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writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
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}
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else if (curSchema < nixSchemaVersion) {
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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)
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throw Error(
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"Your Nix store has a database in flat file 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 1.11 first.");
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if (!lockFile(globalLock.get(), ltWrite, false)) {
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printInfo("waiting for exclusive access to the Nix store...");
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lockFile(globalLock.get(), ltWrite, true);
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}
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/* Get the schema version again, because another process may
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have performed the upgrade already. */
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curSchema = getSchema();
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if (curSchema < 7) { upgradeStore7(); }
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openDB(*state, false);
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if (curSchema < 8) {
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SQLiteTxn txn(state->db);
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state->db.exec("alter table ValidPaths add column ultimate integer");
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state->db.exec("alter table ValidPaths add column sigs text");
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txn.commit();
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}
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if (curSchema < 9) {
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SQLiteTxn txn(state->db);
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state->db.exec("drop table FailedPaths");
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txn.commit();
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}
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if (curSchema < 10) {
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SQLiteTxn txn(state->db);
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state->db.exec("alter table ValidPaths add column ca text");
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txn.commit();
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}
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writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
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lockFile(globalLock.get(), ltRead, true);
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}
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else openDB(*state, false);
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/* Prepare SQL statements. */
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state->stmtRegisterValidPath.create(state->db,
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"insert into ValidPaths (path, hash, registrationTime, deriver, narSize, ultimate, sigs, ca) values (?, ?, ?, ?, ?, ?, ?, ?);");
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state->stmtUpdatePathInfo.create(state->db,
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"update ValidPaths set narSize = ?, hash = ?, ultimate = ?, sigs = ?, ca = ? where path = ?;");
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state->stmtAddReference.create(state->db,
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"insert or replace into Refs (referrer, reference) values (?, ?);");
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state->stmtQueryPathInfo.create(state->db,
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"select id, hash, registrationTime, deriver, narSize, ultimate, sigs, ca from ValidPaths where path = ?;");
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state->stmtQueryReferences.create(state->db,
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"select path from Refs join ValidPaths on reference = id where referrer = ?;");
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state->stmtQueryReferrers.create(state->db,
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"select path from Refs join ValidPaths on referrer = id where reference = (select id from ValidPaths where path = ?);");
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state->stmtInvalidatePath.create(state->db,
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"delete from ValidPaths where path = ?;");
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state->stmtAddDerivationOutput.create(state->db,
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"insert or replace into DerivationOutputs (drv, id, path) values (?, ?, ?);");
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state->stmtQueryValidDerivers.create(state->db,
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"select v.id, v.path from DerivationOutputs d join ValidPaths v on d.drv = v.id where d.path = ?;");
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state->stmtQueryDerivationOutputs.create(state->db,
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"select id, path from DerivationOutputs where drv = ?;");
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// Use "path >= ?" with limit 1 rather than "path like '?%'" to
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// ensure efficient lookup.
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state->stmtQueryPathFromHashPart.create(state->db,
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"select path from ValidPaths where path >= ? limit 1;");
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state->stmtQueryValidPaths.create(state->db, "select path from ValidPaths");
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}
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LocalStore::~LocalStore()
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{
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std::shared_future<void> future;
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{
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auto state(_state.lock());
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if (state->gcRunning)
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future = state->gcFuture;
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}
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if (future.valid()) {
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printInfo("waiting for auto-GC to finish on exit...");
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future.get();
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}
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try {
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auto state(_state.lock());
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if (state->fdTempRoots) {
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state->fdTempRoots = -1;
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unlink(fnTempRoots.c_str());
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}
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} catch (...) {
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ignoreException();
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}
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}
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std::string LocalStore::getUri()
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{
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return "local";
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}
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int LocalStore::getSchema()
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{
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int curSchema = 0;
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if (pathExists(schemaPath)) {
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string s = readFile(schemaPath);
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if (!string2Int(s, curSchema))
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throw Error("'%1%' is corrupt", schemaPath);
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}
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return curSchema;
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}
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void LocalStore::openDB(State & state, bool create)
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{
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if (access(dbDir.c_str(), R_OK | W_OK))
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throw SysError("Nix database directory '%1%' is not writable", dbDir);
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/* Open the Nix database. */
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string dbPath = dbDir + "/db.sqlite";
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auto & db(state.db);
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state.db = SQLite(dbPath, create);
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#ifdef __CYGWIN__
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/* The cygwin version of sqlite3 has a patch which calls
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SetDllDirectory("/usr/bin") on init. It was intended to fix extension
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loading, which we don't use, and the effect of SetDllDirectory is
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inherited by child processes, and causes libraries to be loaded from
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/usr/bin instead of $PATH. This breaks quite a few things (e.g.
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checkPhase on openssh), so we set it back to default behaviour. */
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SetDllDirectoryW(L"");
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#endif
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/* !!! check whether sqlite has been built with foreign key
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support */
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/* Whether SQLite should fsync(). "Normal" synchronous mode
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should be safe enough. If the user asks for it, don't sync at
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all. This can cause database corruption if the system
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crashes. */
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string syncMode = settings.fsyncMetadata ? "normal" : "off";
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db.exec("pragma synchronous = " + syncMode);
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/* Set the SQLite journal mode. WAL mode is fastest, so it's the
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default. */
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string mode = settings.useSQLiteWAL ? "wal" : "truncate";
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string prevMode;
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{
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SQLiteStmt stmt;
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stmt.create(db, "pragma main.journal_mode;");
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if (sqlite3_step(stmt) != SQLITE_ROW)
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throwSQLiteError(db, "querying journal mode");
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prevMode = string((const char *) sqlite3_column_text(stmt, 0));
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}
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if (prevMode != mode &&
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sqlite3_exec(db, ("pragma main.journal_mode = " + mode + ";").c_str(), 0, 0, 0) != SQLITE_OK)
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throwSQLiteError(db, "setting journal mode");
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/* Increase the auto-checkpoint interval to 40000 pages. This
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seems enough to ensure that instantiating the NixOS system
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derivation is done in a single fsync(). */
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if (mode == "wal" && sqlite3_exec(db, "pragma wal_autocheckpoint = 40000;", 0, 0, 0) != SQLITE_OK)
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throwSQLiteError(db, "setting autocheckpoint interval");
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/* Initialise the database schema, if necessary. */
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if (create) {
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static const char schema[] =
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#include "schema.sql.gen.hh"
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;
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db.exec(schema);
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}
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}
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/* To improve purity, users may want to make the Nix store a read-only
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bind mount. So make the Nix store writable for this process. */
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void LocalStore::makeStoreWritable()
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{
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#if __linux__
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if (getuid() != 0) return;
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/* Check if /nix/store is on a read-only mount. */
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struct statvfs stat;
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if (statvfs(realStoreDir.c_str(), &stat) != 0)
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throw SysError("getting info about the Nix store mount point");
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if (stat.f_flag & ST_RDONLY) {
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if (unshare(CLONE_NEWNS) == -1)
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throw SysError("setting up a private mount namespace");
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if (mount(0, realStoreDir.c_str(), "none", MS_REMOUNT | MS_BIND, 0) == -1)
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throw SysError("remounting %1% writable", realStoreDir);
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}
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#endif
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}
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const time_t mtimeStore = 1; /* 1 second into the epoch */
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static void canonicaliseTimestampAndPermissions(const Path & path, const struct stat & st)
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{
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if (!S_ISLNK(st.st_mode)) {
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/* Mask out all type related bits. */
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mode_t mode = st.st_mode & ~S_IFMT;
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if (mode != 0444 && mode != 0555) {
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mode = (st.st_mode & S_IFMT)
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| 0444
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| (st.st_mode & S_IXUSR ? 0111 : 0);
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if (chmod(path.c_str(), mode) == -1)
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throw SysError("changing mode of '%1%' to %2$o", path, mode);
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}
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}
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if (st.st_mtime != mtimeStore) {
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struct timeval times[2];
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times[0].tv_sec = st.st_atime;
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times[0].tv_usec = 0;
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times[1].tv_sec = mtimeStore;
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times[1].tv_usec = 0;
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#if HAVE_LUTIMES
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if (lutimes(path.c_str(), times) == -1)
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if (errno != ENOSYS ||
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(!S_ISLNK(st.st_mode) && utimes(path.c_str(), times) == -1))
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#else
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if (!S_ISLNK(st.st_mode) && utimes(path.c_str(), times) == -1)
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#endif
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throw SysError("changing modification time of '%1%'", path);
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}
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}
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|
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void canonicaliseTimestampAndPermissions(const Path & path)
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{
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struct stat st;
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if (lstat(path.c_str(), &st))
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throw SysError("getting attributes of path '%1%'", path);
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canonicaliseTimestampAndPermissions(path, st);
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}
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|
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static void canonicalisePathMetaData_(const Path & path, uid_t fromUid, InodesSeen & inodesSeen)
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{
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checkInterrupt();
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#if __APPLE__
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/* Remove flags, in particular UF_IMMUTABLE which would prevent
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the file from being garbage-collected. FIXME: Use
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setattrlist() to remove other attributes as well. */
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if (lchflags(path.c_str(), 0)) {
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if (errno != ENOTSUP)
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throw SysError("clearing flags of path '%1%'", path);
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}
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#endif
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struct stat st;
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if (lstat(path.c_str(), &st))
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throw SysError("getting attributes of path '%1%'", path);
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/* Really make sure that the path is of a supported type. */
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if (!(S_ISREG(st.st_mode) || S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode)))
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throw Error("file '%1%' has an unsupported type", path);
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#if __linux__
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/* Remove extended attributes / ACLs. */
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ssize_t eaSize = llistxattr(path.c_str(), nullptr, 0);
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if (eaSize < 0) {
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if (errno != ENOTSUP && errno != ENODATA)
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throw SysError("querying extended attributes of '%s'", path);
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} else if (eaSize > 0) {
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std::vector<char> eaBuf(eaSize);
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if ((eaSize = llistxattr(path.c_str(), eaBuf.data(), eaBuf.size())) < 0)
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throw SysError("querying extended attributes of '%s'", path);
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for (auto & eaName: tokenizeString<Strings>(std::string(eaBuf.data(), eaSize), std::string("\000", 1))) {
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/* Ignore SELinux security labels since these cannot be
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removed even by root. */
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if (eaName == "security.selinux") continue;
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if (lremovexattr(path.c_str(), eaName.c_str()) == -1)
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throw SysError("removing extended attribute '%s' from '%s'", eaName, path);
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}
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}
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#endif
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/* Fail if the file is not owned by the build user. This prevents
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us from messing up the ownership/permissions of files
|
|
hard-linked into the output (e.g. "ln /etc/shadow $out/foo").
|
|
However, ignore files that we chown'ed ourselves previously to
|
|
ensure that we don't fail on hard links within the same build
|
|
(i.e. "touch $out/foo; ln $out/foo $out/bar"). */
|
|
if (fromUid != (uid_t) -1 && st.st_uid != fromUid) {
|
|
assert(!S_ISDIR(st.st_mode));
|
|
if (inodesSeen.find(Inode(st.st_dev, st.st_ino)) == inodesSeen.end())
|
|
throw BuildError("invalid ownership on file '%1%'", path);
|
|
mode_t mode = st.st_mode & ~S_IFMT;
|
|
assert(S_ISLNK(st.st_mode) || (st.st_uid == geteuid() && (mode == 0444 || mode == 0555) && st.st_mtime == mtimeStore));
|
|
return;
|
|
}
|
|
|
|
inodesSeen.insert(Inode(st.st_dev, st.st_ino));
|
|
|
|
canonicaliseTimestampAndPermissions(path, st);
|
|
|
|
/* Change ownership to the current uid. If it's a symlink, use
|
|
lchown if available, otherwise don't bother. Wrong ownership
|
|
of a symlink doesn't matter, since the owning user can't change
|
|
the symlink and can't delete it because the directory is not
|
|
writable. The only exception is top-level paths in the Nix
|
|
store (since that directory is group-writable for the Nix build
|
|
users group); we check for this case below. */
|
|
if (st.st_uid != geteuid()) {
|
|
#if HAVE_LCHOWN
|
|
if (lchown(path.c_str(), geteuid(), getegid()) == -1)
|
|
#else
|
|
if (!S_ISLNK(st.st_mode) &&
|
|
chown(path.c_str(), geteuid(), getegid()) == -1)
|
|
#endif
|
|
throw SysError("changing owner of '%1%' to %2%",
|
|
path, geteuid());
|
|
}
|
|
|
|
if (S_ISDIR(st.st_mode)) {
|
|
DirEntries entries = readDirectory(path);
|
|
for (auto & i : entries)
|
|
canonicalisePathMetaData_(path + "/" + i.name, fromUid, inodesSeen);
|
|
}
|
|
}
|
|
|
|
|
|
void canonicalisePathMetaData(const Path & path, uid_t fromUid, InodesSeen & inodesSeen)
|
|
{
|
|
canonicalisePathMetaData_(path, fromUid, inodesSeen);
|
|
|
|
/* On platforms that don't have lchown(), the top-level path can't
|
|
be a symlink, since we can't change its ownership. */
|
|
struct stat st;
|
|
if (lstat(path.c_str(), &st))
|
|
throw SysError("getting attributes of path '%1%'", path);
|
|
|
|
if (st.st_uid != geteuid()) {
|
|
assert(S_ISLNK(st.st_mode));
|
|
throw Error("wrong ownership of top-level store path '%1%'", path);
|
|
}
|
|
}
|
|
|
|
|
|
void canonicalisePathMetaData(const Path & path, uid_t fromUid)
|
|
{
|
|
InodesSeen inodesSeen;
|
|
canonicalisePathMetaData(path, fromUid, inodesSeen);
|
|
}
|
|
|
|
|
|
void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivation & drv)
|
|
{
|
|
assert(drvPath.isDerivation());
|
|
std::string drvName(drvPath.name());
|
|
drvName = string(drvName, 0, drvName.size() - drvExtension.size());
|
|
|
|
auto check = [&](const StorePath & expected, const StorePath & actual, const std::string & varName)
|
|
{
|
|
if (actual != expected)
|
|
throw Error("derivation '%s' has incorrect output '%s', should be '%s'",
|
|
printStorePath(drvPath), printStorePath(actual), printStorePath(expected));
|
|
auto j = drv.env.find(varName);
|
|
if (j == drv.env.end() || parseStorePath(j->second) != actual)
|
|
throw Error("derivation '%s' has incorrect environment variable '%s', should be '%s'",
|
|
printStorePath(drvPath), varName, printStorePath(actual));
|
|
};
|
|
|
|
|
|
if (drv.isFixedOutput()) {
|
|
DerivationOutputs::const_iterator out = drv.outputs.find("out");
|
|
if (out == drv.outputs.end())
|
|
throw Error("derivation '%s' does not have an output named 'out'", printStorePath(drvPath));
|
|
|
|
check(
|
|
makeFixedOutputPath(
|
|
out->second.hash->method,
|
|
out->second.hash->hash,
|
|
drvName),
|
|
out->second.path, "out");
|
|
}
|
|
|
|
else {
|
|
Hash h = hashDerivationModulo(*this, drv, true);
|
|
for (auto & i : drv.outputs)
|
|
check(makeOutputPath(i.first, h, drvName), i.second.path, i.first);
|
|
}
|
|
}
|
|
|
|
|
|
uint64_t LocalStore::addValidPath(State & state,
|
|
const ValidPathInfo & info, bool checkOutputs)
|
|
{
|
|
if (info.ca.has_value() && !info.isContentAddressed(*this))
|
|
throw Error("cannot add path '%s' to the Nix store because it claims to be content-addressed but isn't",
|
|
printStorePath(info.path));
|
|
|
|
state.stmtRegisterValidPath.use()
|
|
(printStorePath(info.path))
|
|
(info.narHash.to_string(Base16, true))
|
|
(info.registrationTime == 0 ? time(0) : info.registrationTime)
|
|
(info.deriver ? printStorePath(*info.deriver) : "", (bool) info.deriver)
|
|
(info.narSize, info.narSize != 0)
|
|
(info.ultimate ? 1 : 0, info.ultimate)
|
|
(concatStringsSep(" ", info.sigs), !info.sigs.empty())
|
|
(renderContentAddress(info.ca), (bool) info.ca)
|
|
.exec();
|
|
uint64_t id = sqlite3_last_insert_rowid(state.db);
|
|
|
|
/* If this is a derivation, then store the derivation outputs in
|
|
the database. This is useful for the garbage collector: it can
|
|
efficiently query whether a path is an output of some
|
|
derivation. */
|
|
if (info.path.isDerivation()) {
|
|
auto drv = readDerivation(info.path);
|
|
|
|
/* Verify that the output paths in the derivation are correct
|
|
(i.e., follow the scheme for computing output paths from
|
|
derivations). Note that if this throws an error, then the
|
|
DB transaction is rolled back, so the path validity
|
|
registration above is undone. */
|
|
if (checkOutputs) checkDerivationOutputs(info.path, drv);
|
|
|
|
for (auto & i : drv.outputs) {
|
|
state.stmtAddDerivationOutput.use()
|
|
(id)
|
|
(i.first)
|
|
(printStorePath(i.second.path))
|
|
.exec();
|
|
}
|
|
}
|
|
|
|
{
|
|
auto state_(Store::state.lock());
|
|
state_->pathInfoCache.upsert(std::string(info.path.hashPart()),
|
|
PathInfoCacheValue{ .value = std::make_shared<const ValidPathInfo>(info) });
|
|
}
|
|
|
|
return id;
|
|
}
|
|
|
|
|
|
void LocalStore::queryPathInfoUncached(const StorePath & path,
|
|
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept
|
|
{
|
|
try {
|
|
auto info = std::make_shared<ValidPathInfo>(path);
|
|
|
|
callback(retrySQLite<std::shared_ptr<ValidPathInfo>>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
/* Get the path info. */
|
|
auto useQueryPathInfo(state->stmtQueryPathInfo.use()(printStorePath(info->path)));
|
|
|
|
if (!useQueryPathInfo.next())
|
|
return std::shared_ptr<ValidPathInfo>();
|
|
|
|
info->id = useQueryPathInfo.getInt(0);
|
|
|
|
try {
|
|
info->narHash = Hash(useQueryPathInfo.getStr(1));
|
|
} catch (BadHash & e) {
|
|
throw Error("in valid-path entry for '%s': %s", printStorePath(path), e.what());
|
|
}
|
|
|
|
info->registrationTime = useQueryPathInfo.getInt(2);
|
|
|
|
auto s = (const char *) sqlite3_column_text(state->stmtQueryPathInfo, 3);
|
|
if (s) info->deriver = parseStorePath(s);
|
|
|
|
/* Note that narSize = NULL yields 0. */
|
|
info->narSize = useQueryPathInfo.getInt(4);
|
|
|
|
info->ultimate = useQueryPathInfo.getInt(5) == 1;
|
|
|
|
s = (const char *) sqlite3_column_text(state->stmtQueryPathInfo, 6);
|
|
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
|
|
|
|
s = (const char *) sqlite3_column_text(state->stmtQueryPathInfo, 7);
|
|
if (s) info->ca = parseContentAddressOpt(s);
|
|
|
|
/* Get the references. */
|
|
auto useQueryReferences(state->stmtQueryReferences.use()(info->id));
|
|
|
|
while (useQueryReferences.next())
|
|
info->references.insert(parseStorePath(useQueryReferences.getStr(0)));
|
|
|
|
return info;
|
|
}));
|
|
|
|
} catch (...) { callback.rethrow(); }
|
|
}
|
|
|
|
|
|
/* Update path info in the database. */
|
|
void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info)
|
|
{
|
|
state.stmtUpdatePathInfo.use()
|
|
(info.narSize, info.narSize != 0)
|
|
(info.narHash.to_string(Base16, true))
|
|
(info.ultimate ? 1 : 0, info.ultimate)
|
|
(concatStringsSep(" ", info.sigs), !info.sigs.empty())
|
|
(renderContentAddress(info.ca), (bool) info.ca)
|
|
(printStorePath(info.path))
|
|
.exec();
|
|
}
|
|
|
|
|
|
uint64_t LocalStore::queryValidPathId(State & state, const StorePath & path)
|
|
{
|
|
auto use(state.stmtQueryPathInfo.use()(printStorePath(path)));
|
|
if (!use.next())
|
|
throw Error("path '%s' is not valid", printStorePath(path));
|
|
return use.getInt(0);
|
|
}
|
|
|
|
|
|
bool LocalStore::isValidPath_(State & state, const StorePath & path)
|
|
{
|
|
return state.stmtQueryPathInfo.use()(printStorePath(path)).next();
|
|
}
|
|
|
|
|
|
bool LocalStore::isValidPathUncached(const StorePath & path)
|
|
{
|
|
return retrySQLite<bool>([&]() {
|
|
auto state(_state.lock());
|
|
return isValidPath_(*state, path);
|
|
});
|
|
}
|
|
|
|
|
|
StorePathSet LocalStore::queryValidPaths(const StorePathSet & paths, SubstituteFlag maybeSubstitute)
|
|
{
|
|
StorePathSet res;
|
|
for (auto & i : paths)
|
|
if (isValidPath(i)) res.insert(i);
|
|
return res;
|
|
}
|
|
|
|
|
|
StorePathSet LocalStore::queryAllValidPaths()
|
|
{
|
|
return retrySQLite<StorePathSet>([&]() {
|
|
auto state(_state.lock());
|
|
auto use(state->stmtQueryValidPaths.use());
|
|
StorePathSet res;
|
|
while (use.next()) res.insert(parseStorePath(use.getStr(0)));
|
|
return res;
|
|
});
|
|
}
|
|
|
|
|
|
void LocalStore::queryReferrers(State & state, const StorePath & path, StorePathSet & referrers)
|
|
{
|
|
auto useQueryReferrers(state.stmtQueryReferrers.use()(printStorePath(path)));
|
|
|
|
while (useQueryReferrers.next())
|
|
referrers.insert(parseStorePath(useQueryReferrers.getStr(0)));
|
|
}
|
|
|
|
|
|
void LocalStore::queryReferrers(const StorePath & path, StorePathSet & referrers)
|
|
{
|
|
return retrySQLite<void>([&]() {
|
|
auto state(_state.lock());
|
|
queryReferrers(*state, path, referrers);
|
|
});
|
|
}
|
|
|
|
|
|
StorePathSet LocalStore::queryValidDerivers(const StorePath & path)
|
|
{
|
|
return retrySQLite<StorePathSet>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
auto useQueryValidDerivers(state->stmtQueryValidDerivers.use()(printStorePath(path)));
|
|
|
|
StorePathSet derivers;
|
|
while (useQueryValidDerivers.next())
|
|
derivers.insert(parseStorePath(useQueryValidDerivers.getStr(1)));
|
|
|
|
return derivers;
|
|
});
|
|
}
|
|
|
|
|
|
OutputPathMap LocalStore::queryDerivationOutputMap(const StorePath & path)
|
|
{
|
|
return retrySQLite<OutputPathMap>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
auto useQueryDerivationOutputs(state->stmtQueryDerivationOutputs.use()
|
|
(queryValidPathId(*state, path)));
|
|
|
|
OutputPathMap outputs;
|
|
while (useQueryDerivationOutputs.next())
|
|
outputs.emplace(
|
|
useQueryDerivationOutputs.getStr(0),
|
|
parseStorePath(useQueryDerivationOutputs.getStr(1))
|
|
);
|
|
|
|
return outputs;
|
|
});
|
|
}
|
|
|
|
|
|
std::optional<StorePath> LocalStore::queryPathFromHashPart(const std::string & hashPart)
|
|
{
|
|
if (hashPart.size() != StorePath::HashLen) throw Error("invalid hash part");
|
|
|
|
Path prefix = storeDir + "/" + hashPart;
|
|
|
|
return retrySQLite<std::optional<StorePath>>([&]() -> std::optional<StorePath> {
|
|
auto state(_state.lock());
|
|
|
|
auto useQueryPathFromHashPart(state->stmtQueryPathFromHashPart.use()(prefix));
|
|
|
|
if (!useQueryPathFromHashPart.next()) return {};
|
|
|
|
const char * s = (const char *) sqlite3_column_text(state->stmtQueryPathFromHashPart, 0);
|
|
if (s && prefix.compare(0, prefix.size(), s, prefix.size()) == 0)
|
|
return parseStorePath(s);
|
|
return {};
|
|
});
|
|
}
|
|
|
|
|
|
StorePathSet LocalStore::querySubstitutablePaths(const StorePathSet & paths)
|
|
{
|
|
if (!settings.useSubstitutes) return StorePathSet();
|
|
|
|
StorePathSet remaining;
|
|
for (auto & i : paths)
|
|
remaining.insert(i);
|
|
|
|
StorePathSet res;
|
|
|
|
for (auto & sub : getDefaultSubstituters()) {
|
|
if (remaining.empty()) break;
|
|
if (sub->storeDir != storeDir) continue;
|
|
if (!sub->wantMassQuery) continue;
|
|
|
|
auto valid = sub->queryValidPaths(remaining);
|
|
|
|
StorePathSet remaining2;
|
|
for (auto & path : remaining)
|
|
if (valid.count(path))
|
|
res.insert(path);
|
|
else
|
|
remaining2.insert(path);
|
|
|
|
std::swap(remaining, remaining2);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
void LocalStore::querySubstitutablePathInfos(const StorePathSet & paths,
|
|
SubstitutablePathInfos & infos)
|
|
{
|
|
if (!settings.useSubstitutes) return;
|
|
for (auto & sub : getDefaultSubstituters()) {
|
|
if (sub->storeDir != storeDir) continue;
|
|
for (auto & path : paths) {
|
|
if (infos.count(path)) continue;
|
|
debug("checking substituter '%s' for path '%s'", sub->getUri(), printStorePath(path));
|
|
try {
|
|
auto info = sub->queryPathInfo(path);
|
|
auto narInfo = std::dynamic_pointer_cast<const NarInfo>(
|
|
std::shared_ptr<const ValidPathInfo>(info));
|
|
infos.insert_or_assign(path, SubstitutablePathInfo{
|
|
info->deriver,
|
|
info->references,
|
|
narInfo ? narInfo->fileSize : 0,
|
|
info->narSize});
|
|
} catch (InvalidPath &) {
|
|
} catch (SubstituterDisabled &) {
|
|
} catch (Error & e) {
|
|
if (settings.tryFallback)
|
|
logError(e.info());
|
|
else
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void LocalStore::registerValidPath(const ValidPathInfo & info)
|
|
{
|
|
ValidPathInfos infos;
|
|
infos.push_back(info);
|
|
registerValidPaths(infos);
|
|
}
|
|
|
|
|
|
void LocalStore::registerValidPaths(const ValidPathInfos & infos)
|
|
{
|
|
/* SQLite will fsync by default, but the new valid paths may not
|
|
be fsync-ed. So some may want to fsync them before registering
|
|
the validity, at the expense of some speed of the path
|
|
registering operation. */
|
|
if (settings.syncBeforeRegistering) sync();
|
|
|
|
return retrySQLite<void>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
SQLiteTxn txn(state->db);
|
|
StorePathSet paths;
|
|
|
|
for (auto & i : infos) {
|
|
assert(i.narHash.type == htSHA256);
|
|
if (isValidPath_(*state, i.path))
|
|
updatePathInfo(*state, i);
|
|
else
|
|
addValidPath(*state, i, false);
|
|
paths.insert(i.path);
|
|
}
|
|
|
|
for (auto & i : infos) {
|
|
auto referrer = queryValidPathId(*state, i.path);
|
|
for (auto & j : i.references)
|
|
state->stmtAddReference.use()(referrer)(queryValidPathId(*state, j)).exec();
|
|
}
|
|
|
|
/* Check that the derivation outputs are correct. We can't do
|
|
this in addValidPath() above, because the references might
|
|
not be valid yet. */
|
|
for (auto & i : infos)
|
|
if (i.path.isDerivation()) {
|
|
// FIXME: inefficient; we already loaded the derivation in addValidPath().
|
|
checkDerivationOutputs(i.path, readDerivation(i.path));
|
|
}
|
|
|
|
/* Do a topological sort of the paths. This will throw an
|
|
error if a cycle is detected and roll back the
|
|
transaction. Cycles can only occur when a derivation
|
|
has multiple outputs. */
|
|
topoSortPaths(paths);
|
|
|
|
txn.commit();
|
|
});
|
|
}
|
|
|
|
|
|
/* Invalidate a path. The caller is responsible for checking that
|
|
there are no referrers. */
|
|
void LocalStore::invalidatePath(State & state, const StorePath & path)
|
|
{
|
|
debug("invalidating path '%s'", printStorePath(path));
|
|
|
|
state.stmtInvalidatePath.use()(printStorePath(path)).exec();
|
|
|
|
/* 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(std::string(path.hashPart()));
|
|
}
|
|
}
|
|
|
|
|
|
const PublicKeys & LocalStore::getPublicKeys()
|
|
{
|
|
auto state(_state.lock());
|
|
if (!state->publicKeys)
|
|
state->publicKeys = std::make_unique<PublicKeys>(getDefaultPublicKeys());
|
|
return *state->publicKeys;
|
|
}
|
|
|
|
|
|
void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
|
|
RepairFlag repair, CheckSigsFlag checkSigs, std::shared_ptr<FSAccessor> accessor)
|
|
{
|
|
if (!info.narHash)
|
|
throw Error("cannot add path '%s' because it lacks a hash", printStorePath(info.path));
|
|
|
|
if (requireSigs && checkSigs && !info.checkSignatures(*this, getPublicKeys()))
|
|
throw Error("cannot add path '%s' because it lacks a valid signature", printStorePath(info.path));
|
|
|
|
addTempRoot(info.path);
|
|
|
|
if (repair || !isValidPath(info.path)) {
|
|
|
|
PathLocks outputLock;
|
|
|
|
Path realPath = realStoreDir + "/" + std::string(info.path.to_string());
|
|
|
|
/* Lock the output path. But don't lock if we're being called
|
|
from a build hook (whose parent process already acquired a
|
|
lock on this path). */
|
|
if (!locksHeld.count(printStorePath(info.path)))
|
|
outputLock.lockPaths({realPath});
|
|
|
|
if (repair || !isValidPath(info.path)) {
|
|
|
|
deletePath(realPath);
|
|
|
|
// text hashing has long been allowed to have non-self-references because it is used for drv files.
|
|
bool refersToSelf = info.references.count(info.path) > 0;
|
|
if (info.ca.has_value() && !info.references.empty() && !(std::holds_alternative<TextHash>(*info.ca) && !refersToSelf))
|
|
settings.requireExperimentalFeature("ca-references");
|
|
|
|
/* While restoring the path from the NAR, compute the hash
|
|
of the NAR. */
|
|
std::unique_ptr<AbstractHashSink> hashSink;
|
|
if (!info.ca.has_value() || !info.references.count(info.path))
|
|
hashSink = std::make_unique<HashSink>(htSHA256);
|
|
else
|
|
hashSink = std::make_unique<HashModuloSink>(htSHA256, std::string(info.path.hashPart()));
|
|
|
|
LambdaSource wrapperSource([&](unsigned char * data, size_t len) -> size_t {
|
|
size_t n = source.read(data, len);
|
|
(*hashSink)(data, n);
|
|
return n;
|
|
});
|
|
|
|
restorePath(realPath, wrapperSource);
|
|
|
|
auto hashResult = hashSink->finish();
|
|
|
|
if (hashResult.first != info.narHash)
|
|
throw Error("hash mismatch importing path '%s';\n wanted: %s\n got: %s",
|
|
printStorePath(info.path), info.narHash.to_string(Base32, true), hashResult.first.to_string(Base32, true));
|
|
|
|
if (hashResult.second != info.narSize)
|
|
throw Error("size mismatch importing path '%s';\n wanted: %s\n got: %s",
|
|
printStorePath(info.path), info.narSize, hashResult.second);
|
|
|
|
autoGC();
|
|
|
|
canonicalisePathMetaData(realPath, -1);
|
|
|
|
optimisePath(realPath); // FIXME: combine with hashPath()
|
|
|
|
registerValidPath(info);
|
|
}
|
|
|
|
outputLock.setDeletion(true);
|
|
}
|
|
}
|
|
|
|
|
|
StorePath LocalStore::addToStoreFromDump(const string & dump, const string & name,
|
|
FileIngestionMethod method, HashType hashAlgo, RepairFlag repair)
|
|
{
|
|
Hash h = hashString(hashAlgo, dump);
|
|
|
|
auto dstPath = makeFixedOutputPath(method, h, name);
|
|
|
|
addTempRoot(dstPath);
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
/* The first check above is an optimisation to prevent
|
|
unnecessary lock acquisition. */
|
|
|
|
Path realPath = realStoreDir + "/";
|
|
realPath += dstPath.to_string();
|
|
|
|
PathLocks outputLock({realPath});
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
deletePath(realPath);
|
|
|
|
autoGC();
|
|
|
|
if (method == FileIngestionMethod::Recursive) {
|
|
StringSource source(dump);
|
|
restorePath(realPath, source);
|
|
} else
|
|
writeFile(realPath, dump);
|
|
|
|
canonicalisePathMetaData(realPath, -1);
|
|
|
|
/* Register the SHA-256 hash of the NAR serialisation of
|
|
the path in the database. We may just have computed it
|
|
above (if called with recursive == true and hashAlgo ==
|
|
sha256); otherwise, compute it here. */
|
|
HashResult hash;
|
|
if (method == FileIngestionMethod::Recursive) {
|
|
hash.first = hashAlgo == htSHA256 ? h : hashString(htSHA256, dump);
|
|
hash.second = dump.size();
|
|
} else
|
|
hash = hashPath(htSHA256, realPath);
|
|
|
|
optimisePath(realPath); // FIXME: combine with hashPath()
|
|
|
|
ValidPathInfo info(dstPath);
|
|
info.narHash = hash.first;
|
|
info.narSize = hash.second;
|
|
info.ca = FixedOutputHash { .method = method, .hash = h };
|
|
registerValidPath(info);
|
|
}
|
|
|
|
outputLock.setDeletion(true);
|
|
}
|
|
|
|
return dstPath;
|
|
}
|
|
|
|
|
|
StorePath LocalStore::addToStore(const string & name, const Path & _srcPath,
|
|
FileIngestionMethod method, HashType hashAlgo, PathFilter & filter, RepairFlag repair)
|
|
{
|
|
Path srcPath(absPath(_srcPath));
|
|
|
|
if (method != FileIngestionMethod::Recursive)
|
|
return addToStoreFromDump(readFile(srcPath), name, method, hashAlgo, repair);
|
|
|
|
/* For computing the NAR hash. */
|
|
auto sha256Sink = std::make_unique<HashSink>(htSHA256);
|
|
|
|
/* For computing the store path. In recursive SHA-256 mode, this
|
|
is the same as the NAR hash, so no need to do it again. */
|
|
std::unique_ptr<HashSink> hashSink =
|
|
hashAlgo == htSHA256
|
|
? nullptr
|
|
: std::make_unique<HashSink>(hashAlgo);
|
|
|
|
/* Read the source path into memory, but only if it's up to
|
|
narBufferSize bytes. If it's larger, write it to a temporary
|
|
location in the Nix store. If the subsequently computed
|
|
destination store path is already valid, we just delete the
|
|
temporary path. Otherwise, we move it to the destination store
|
|
path. */
|
|
bool inMemory = true;
|
|
std::string nar;
|
|
|
|
auto source = sinkToSource([&](Sink & sink) {
|
|
|
|
LambdaSink sink2([&](const unsigned char * buf, size_t len) {
|
|
(*sha256Sink)(buf, len);
|
|
if (hashSink) (*hashSink)(buf, len);
|
|
|
|
if (inMemory) {
|
|
if (nar.size() + len > settings.narBufferSize) {
|
|
inMemory = false;
|
|
sink << 1;
|
|
sink((const unsigned char *) nar.data(), nar.size());
|
|
nar.clear();
|
|
} else {
|
|
nar.append((const char *) buf, len);
|
|
}
|
|
}
|
|
|
|
if (!inMemory) sink(buf, len);
|
|
});
|
|
|
|
dumpPath(srcPath, sink2, filter);
|
|
});
|
|
|
|
std::unique_ptr<AutoDelete> delTempDir;
|
|
Path tempPath;
|
|
|
|
try {
|
|
/* Wait for the source coroutine to give us some dummy
|
|
data. This is so that we don't create the temporary
|
|
directory if the NAR fits in memory. */
|
|
readInt(*source);
|
|
|
|
auto tempDir = createTempDir(realStoreDir, "add");
|
|
delTempDir = std::make_unique<AutoDelete>(tempDir);
|
|
tempPath = tempDir + "/x";
|
|
|
|
restorePath(tempPath, *source);
|
|
|
|
} catch (EndOfFile &) {
|
|
if (!inMemory) throw;
|
|
/* The NAR fits in memory, so we didn't do restorePath(). */
|
|
}
|
|
|
|
auto sha256 = sha256Sink->finish();
|
|
|
|
Hash hash = hashSink ? hashSink->finish().first : sha256.first;
|
|
|
|
Path dstPath = makeFixedOutputPath(method, hash, name);
|
|
|
|
addTempRoot(dstPath);
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
/* The first check above is an optimisation to prevent
|
|
unnecessary lock acquisition. */
|
|
|
|
Path realPath = realStoreDir + "/" + baseNameOf(dstPath);
|
|
|
|
PathLocks outputLock({realPath});
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
deletePath(realPath);
|
|
|
|
autoGC();
|
|
|
|
if (inMemory) {
|
|
/* Restore from the NAR in memory. */
|
|
StringSource source(nar);
|
|
restorePath(realPath, source);
|
|
} else {
|
|
/* Move the temporary path we restored above. */
|
|
if (rename(tempPath.c_str(), realPath.c_str()))
|
|
throw Error("renaming '%s' to '%s'", tempPath, realPath);
|
|
}
|
|
|
|
canonicalisePathMetaData(realPath, -1); // FIXME: merge into restorePath
|
|
|
|
optimisePath(realPath);
|
|
|
|
ValidPathInfo info(dstPath);
|
|
info.narHash = sha256.first;
|
|
info.narSize = sha256.second;
|
|
info.ca = FixedOutputHash { .method = method, .hash = hash };
|
|
registerValidPath(info);
|
|
}
|
|
|
|
outputLock.setDeletion(true);
|
|
}
|
|
|
|
return dstPath;
|
|
}
|
|
|
|
|
|
StorePath LocalStore::addTextToStore(const string & name, const string & s,
|
|
const StorePathSet & references, RepairFlag repair)
|
|
{
|
|
auto hash = hashString(htSHA256, s);
|
|
auto dstPath = makeTextPath(name, hash, references);
|
|
|
|
addTempRoot(dstPath);
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
Path realPath = realStoreDir + "/";
|
|
realPath += dstPath.to_string();
|
|
|
|
PathLocks outputLock({realPath});
|
|
|
|
if (repair || !isValidPath(dstPath)) {
|
|
|
|
deletePath(realPath);
|
|
|
|
autoGC();
|
|
|
|
writeFile(realPath, s);
|
|
|
|
canonicalisePathMetaData(realPath, -1);
|
|
|
|
StringSink sink;
|
|
dumpString(s, sink);
|
|
auto narHash = hashString(htSHA256, *sink.s);
|
|
|
|
optimisePath(realPath);
|
|
|
|
ValidPathInfo info(dstPath);
|
|
info.narHash = narHash;
|
|
info.narSize = sink.s->size();
|
|
info.references = references;
|
|
info.ca = TextHash { .hash = hash };
|
|
registerValidPath(info);
|
|
}
|
|
|
|
outputLock.setDeletion(true);
|
|
}
|
|
|
|
return dstPath;
|
|
}
|
|
|
|
|
|
/* Create a temporary directory in the store that won't be
|
|
garbage-collected. */
|
|
Path LocalStore::createTempDirInStore()
|
|
{
|
|
Path tmpDir;
|
|
do {
|
|
/* There is a slight possibility that `tmpDir' gets deleted by
|
|
the GC between createTempDir() and addTempRoot(), so repeat
|
|
until `tmpDir' exists. */
|
|
tmpDir = createTempDir(realStoreDir);
|
|
addTempRoot(parseStorePath(tmpDir));
|
|
} while (!pathExists(tmpDir));
|
|
return tmpDir;
|
|
}
|
|
|
|
|
|
void LocalStore::invalidatePathChecked(const StorePath & path)
|
|
{
|
|
retrySQLite<void>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
SQLiteTxn txn(state->db);
|
|
|
|
if (isValidPath_(*state, path)) {
|
|
StorePathSet referrers; queryReferrers(*state, path, referrers);
|
|
referrers.erase(path); /* ignore self-references */
|
|
if (!referrers.empty())
|
|
throw PathInUse("cannot delete path '%s' because it is in use by %s",
|
|
printStorePath(path), showPaths(referrers));
|
|
invalidatePath(*state, path);
|
|
}
|
|
|
|
txn.commit();
|
|
});
|
|
}
|
|
|
|
|
|
bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
|
|
{
|
|
printInfo(format("reading the Nix store..."));
|
|
|
|
bool errors = false;
|
|
|
|
/* Acquire the global GC lock to get a consistent snapshot of
|
|
existing and valid paths. */
|
|
AutoCloseFD fdGCLock = openGCLock(ltWrite);
|
|
|
|
StringSet store;
|
|
for (auto & i : readDirectory(realStoreDir)) store.insert(i.name);
|
|
|
|
/* Check whether all valid paths actually exist. */
|
|
printInfo("checking path existence...");
|
|
|
|
StorePathSet validPaths;
|
|
PathSet done;
|
|
|
|
fdGCLock = -1;
|
|
|
|
for (auto & i : queryAllValidPaths())
|
|
verifyPath(printStorePath(i), store, done, validPaths, repair, errors);
|
|
|
|
/* Optionally, check the content hashes (slow). */
|
|
if (checkContents) {
|
|
|
|
printInfo("checking link hashes...");
|
|
|
|
for (auto & link : readDirectory(linksDir)) {
|
|
printMsg(lvlTalkative, "checking contents of '%s'", link.name);
|
|
Path linkPath = linksDir + "/" + link.name;
|
|
string hash = hashPath(htSHA256, linkPath).first.to_string(Base32, false);
|
|
if (hash != link.name) {
|
|
logError({
|
|
.name = "Invalid hash",
|
|
.hint = hintfmt(
|
|
"link '%s' was modified! expected hash '%s', got '%s'",
|
|
linkPath, link.name, hash)
|
|
});
|
|
if (repair) {
|
|
if (unlink(linkPath.c_str()) == 0)
|
|
printInfo("removed link '%s'", linkPath);
|
|
else
|
|
throw SysError("removing corrupt link '%s'", linkPath);
|
|
} else {
|
|
errors = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
printInfo("checking store hashes...");
|
|
|
|
Hash nullHash(htSHA256);
|
|
|
|
for (auto & i : validPaths) {
|
|
try {
|
|
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(i)));
|
|
|
|
/* Check the content hash (optionally - slow). */
|
|
printMsg(lvlTalkative, "checking contents of '%s'", printStorePath(i));
|
|
|
|
std::unique_ptr<AbstractHashSink> hashSink;
|
|
if (!info->ca || !info->references.count(info->path))
|
|
hashSink = std::make_unique<HashSink>(*info->narHash.type);
|
|
else
|
|
hashSink = std::make_unique<HashModuloSink>(*info->narHash.type, std::string(info->path.hashPart()));
|
|
|
|
dumpPath(Store::toRealPath(i), *hashSink);
|
|
auto current = hashSink->finish();
|
|
|
|
if (info->narHash != nullHash && info->narHash != current.first) {
|
|
logError({
|
|
.name = "Invalid hash - path modified",
|
|
.hint = hintfmt("path '%s' was modified! expected hash '%s', got '%s'",
|
|
printStorePath(i), info->narHash.to_string(Base32, true), current.first.to_string(Base32, true))
|
|
});
|
|
if (repair) repairPath(i); else errors = true;
|
|
} else {
|
|
|
|
bool update = false;
|
|
|
|
/* Fill in missing hashes. */
|
|
if (info->narHash == nullHash) {
|
|
printInfo("fixing missing hash on '%s'", printStorePath(i));
|
|
info->narHash = current.first;
|
|
update = true;
|
|
}
|
|
|
|
/* Fill in missing narSize fields (from old stores). */
|
|
if (info->narSize == 0) {
|
|
printInfo("updating size field on '%s' to %s", printStorePath(i), current.second);
|
|
info->narSize = current.second;
|
|
update = true;
|
|
}
|
|
|
|
if (update) {
|
|
auto state(_state.lock());
|
|
updatePathInfo(*state, *info);
|
|
}
|
|
|
|
}
|
|
|
|
} catch (Error & e) {
|
|
/* It's possible that the path got GC'ed, so ignore
|
|
errors on invalid paths. */
|
|
if (isValidPath(i))
|
|
logError(e.info());
|
|
else
|
|
warn(e.msg());
|
|
errors = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return errors;
|
|
}
|
|
|
|
|
|
void LocalStore::verifyPath(const Path & pathS, const StringSet & store,
|
|
PathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors)
|
|
{
|
|
checkInterrupt();
|
|
|
|
if (!done.insert(pathS).second) return;
|
|
|
|
if (!isStorePath(pathS)) {
|
|
logError({
|
|
.name = "Nix path not found",
|
|
.hint = hintfmt("path '%s' is not in the Nix store", pathS)
|
|
});
|
|
return;
|
|
}
|
|
|
|
auto path = parseStorePath(pathS);
|
|
|
|
if (!store.count(std::string(path.to_string()))) {
|
|
/* Check any referrers first. If we can invalidate them
|
|
first, then we can invalidate this path as well. */
|
|
bool canInvalidate = true;
|
|
StorePathSet referrers; queryReferrers(path, referrers);
|
|
for (auto & i : referrers)
|
|
if (i != path) {
|
|
verifyPath(printStorePath(i), store, done, validPaths, repair, errors);
|
|
if (validPaths.count(i))
|
|
canInvalidate = false;
|
|
}
|
|
|
|
if (canInvalidate) {
|
|
printInfo("path '%s' disappeared, removing from database...", pathS);
|
|
auto state(_state.lock());
|
|
invalidatePath(*state, path);
|
|
} else {
|
|
logError({
|
|
.name = "Missing path with referrers",
|
|
.hint = hintfmt("path '%s' disappeared, but it still has valid referrers!", pathS)
|
|
});
|
|
if (repair)
|
|
try {
|
|
repairPath(path);
|
|
} catch (Error & e) {
|
|
logWarning(e.info());
|
|
errors = true;
|
|
}
|
|
else errors = true;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
validPaths.insert(std::move(path));
|
|
}
|
|
|
|
|
|
unsigned int LocalStore::getProtocol()
|
|
{
|
|
return PROTOCOL_VERSION;
|
|
}
|
|
|
|
|
|
#if defined(FS_IOC_SETFLAGS) && defined(FS_IOC_GETFLAGS) && defined(FS_IMMUTABLE_FL)
|
|
|
|
static void makeMutable(const Path & path)
|
|
{
|
|
checkInterrupt();
|
|
|
|
struct stat st = lstat(path);
|
|
|
|
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) return;
|
|
|
|
if (S_ISDIR(st.st_mode)) {
|
|
for (auto & i : readDirectory(path))
|
|
makeMutable(path + "/" + i.name);
|
|
}
|
|
|
|
/* The O_NOFOLLOW is important to prevent us from changing the
|
|
mutable bit on the target of a symlink (which would be a
|
|
security hole). */
|
|
AutoCloseFD fd = open(path.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
|
|
if (fd == -1) {
|
|
if (errno == ELOOP) return; // it's a symlink
|
|
throw SysError("opening file '%1%'", path);
|
|
}
|
|
|
|
unsigned int flags = 0, old;
|
|
|
|
/* Silently ignore errors getting/setting the immutable flag so
|
|
that we work correctly on filesystems that don't support it. */
|
|
if (ioctl(fd, FS_IOC_GETFLAGS, &flags)) return;
|
|
old = flags;
|
|
flags &= ~FS_IMMUTABLE_FL;
|
|
if (old == flags) return;
|
|
if (ioctl(fd, FS_IOC_SETFLAGS, &flags)) return;
|
|
}
|
|
|
|
/* Upgrade from schema 6 (Nix 0.15) to schema 7 (Nix >= 1.3). */
|
|
void LocalStore::upgradeStore7()
|
|
{
|
|
if (getuid() != 0) return;
|
|
printInfo("removing immutable bits from the Nix store (this may take a while)...");
|
|
makeMutable(realStoreDir);
|
|
}
|
|
|
|
#else
|
|
|
|
void LocalStore::upgradeStore7()
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
void LocalStore::vacuumDB()
|
|
{
|
|
auto state(_state.lock());
|
|
state->db.exec("vacuum");
|
|
}
|
|
|
|
|
|
void LocalStore::addSignatures(const StorePath & storePath, const StringSet & sigs)
|
|
{
|
|
retrySQLite<void>([&]() {
|
|
auto state(_state.lock());
|
|
|
|
SQLiteTxn txn(state->db);
|
|
|
|
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(storePath)));
|
|
|
|
info->sigs.insert(sigs.begin(), sigs.end());
|
|
|
|
updatePathInfo(*state, *info);
|
|
|
|
txn.commit();
|
|
});
|
|
}
|
|
|
|
|
|
void LocalStore::signPathInfo(ValidPathInfo & info)
|
|
{
|
|
// FIXME: keep secret keys in memory.
|
|
|
|
auto secretKeyFiles = settings.secretKeyFiles;
|
|
|
|
for (auto & secretKeyFile : secretKeyFiles.get()) {
|
|
SecretKey secretKey(readFile(secretKeyFile));
|
|
info.sign(*this, secretKey);
|
|
}
|
|
}
|
|
|
|
|
|
void LocalStore::createUser(const std::string & userName, uid_t userId)
|
|
{
|
|
for (auto & dir : {
|
|
fmt("%s/profiles/per-user/%s", stateDir, userName),
|
|
fmt("%s/gcroots/per-user/%s", stateDir, userName)
|
|
}) {
|
|
createDirs(dir);
|
|
if (chmod(dir.c_str(), 0755) == -1)
|
|
throw SysError("changing permissions of directory '%s'", dir);
|
|
if (chown(dir.c_str(), userId, getgid()) == -1)
|
|
throw SysError("changing owner of directory '%s'", dir);
|
|
}
|
|
}
|
|
|
|
|
|
}
|