1b1f557d88
* nix/libstore/local-store.cc (LocalStore::getLineFromSubstituter): Include the malformed substituter stream line in the error message.
1626 lines
50 KiB
C++
1626 lines
50 KiB
C++
#include "config.h"
|
||
#include "local-store.hh"
|
||
#include "globals.hh"
|
||
#include "archive.hh"
|
||
#include "pathlocks.hh"
|
||
#include "worker-protocol.hh"
|
||
#include "derivations.hh"
|
||
#include "affinity.hh"
|
||
|
||
#include <iostream>
|
||
#include <algorithm>
|
||
#include <cstring>
|
||
|
||
#include <sys/types.h>
|
||
#include <sys/stat.h>
|
||
#include <sys/time.h>
|
||
#include <unistd.h>
|
||
#include <utime.h>
|
||
#include <fcntl.h>
|
||
#include <errno.h>
|
||
#include <stdio.h>
|
||
#include <time.h>
|
||
#include <grp.h>
|
||
#include <ctype.h>
|
||
|
||
#if HAVE_UNSHARE && HAVE_STATVFS && HAVE_SYS_MOUNT_H
|
||
#include <sched.h>
|
||
#include <sys/statvfs.h>
|
||
#include <sys/mount.h>
|
||
#endif
|
||
|
||
#include <sys/ioctl.h>
|
||
#include <errno.h>
|
||
|
||
#include <sqlite3.h>
|
||
|
||
|
||
namespace nix {
|
||
|
||
|
||
void checkStoreNotSymlink()
|
||
{
|
||
if (getEnv("NIX_IGNORE_SYMLINK_STORE") == "1") return;
|
||
Path path = settings.nixStore;
|
||
struct stat st;
|
||
while (path != "/") {
|
||
if (lstat(path.c_str(), &st))
|
||
throw SysError(format("getting status of `%1%'") % path);
|
||
if (S_ISLNK(st.st_mode))
|
||
throw Error(format(
|
||
"the path `%1%' is a symlink; "
|
||
"this is not allowed for the store and its parent directories")
|
||
% path);
|
||
path = dirOf(path);
|
||
}
|
||
}
|
||
|
||
|
||
LocalStore::LocalStore(bool reserveSpace)
|
||
{
|
||
schemaPath = settings.nixDBPath + "/schema";
|
||
|
||
if (settings.readOnlyMode) {
|
||
openDB(false);
|
||
return;
|
||
}
|
||
|
||
/* Create missing state directories if they don't already exist. */
|
||
createDirs(settings.nixStore);
|
||
makeStoreWritable();
|
||
createDirs(linksDir = settings.nixStore + "/.links");
|
||
Path profilesDir = settings.nixStateDir + "/profiles";
|
||
createDirs(profilesDir);
|
||
createDirs(settings.nixStateDir + "/temproots");
|
||
createDirs(settings.nixDBPath);
|
||
Path gcRootsDir = settings.nixStateDir + "/gcroots";
|
||
if (!pathExists(gcRootsDir)) {
|
||
createDirs(gcRootsDir);
|
||
createSymlink(profilesDir, gcRootsDir + "/profiles");
|
||
}
|
||
|
||
/* Optionally, create directories and set permissions for a
|
||
multi-user install. */
|
||
if (getuid() == 0 && settings.buildUsersGroup != "") {
|
||
|
||
Path perUserDir = profilesDir + "/per-user";
|
||
createDirs(perUserDir);
|
||
if (chmod(perUserDir.c_str(), 0755) == -1)
|
||
throw SysError(format("could not set permissions on '%1%' to 755")
|
||
% perUserDir);
|
||
|
||
mode_t perm = 01775;
|
||
|
||
struct group * gr = getgrnam(settings.buildUsersGroup.c_str());
|
||
if (!gr)
|
||
throw Error(format("the group `%1%' specified in `build-users-group' does not exist")
|
||
% settings.buildUsersGroup);
|
||
else {
|
||
struct stat st;
|
||
if (stat(settings.nixStore.c_str(), &st))
|
||
throw SysError(format("getting attributes of path '%1%'") % settings.nixStore);
|
||
|
||
if (st.st_uid != 0 || st.st_gid != gr->gr_gid || (st.st_mode & ~S_IFMT) != perm) {
|
||
if (chown(settings.nixStore.c_str(), 0, gr->gr_gid) == -1)
|
||
throw SysError(format("changing ownership of path '%1%'") % settings.nixStore);
|
||
if (chmod(settings.nixStore.c_str(), perm) == -1)
|
||
throw SysError(format("changing permissions on path '%1%'") % settings.nixStore);
|
||
}
|
||
}
|
||
}
|
||
|
||
checkStoreNotSymlink();
|
||
|
||
/* We can't open a SQLite database if the disk is full. Since
|
||
this prevents the garbage collector from running when it's most
|
||
needed, we reserve some dummy space that we can free just
|
||
before doing a garbage collection. */
|
||
try {
|
||
Path reservedPath = settings.nixDBPath + "/reserved";
|
||
if (reserveSpace) {
|
||
struct stat st;
|
||
if (stat(reservedPath.c_str(), &st) == -1 ||
|
||
st.st_size != settings.reservedSize)
|
||
{
|
||
AutoCloseFD fd = open(reservedPath.c_str(), O_WRONLY | O_CREAT, 0600);
|
||
int res = -1;
|
||
#if HAVE_POSIX_FALLOCATE
|
||
res = posix_fallocate(fd, 0, settings.reservedSize);
|
||
#endif
|
||
if (res == -1) {
|
||
writeFull(fd, string(settings.reservedSize, 'X'));
|
||
ftruncate(fd, settings.reservedSize);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
deletePath(reservedPath);
|
||
} catch (SysError & e) { /* don't care about errors */
|
||
}
|
||
|
||
/* Acquire the big fat lock in shared mode to make sure that no
|
||
schema upgrade is in progress. */
|
||
try {
|
||
Path globalLockPath = settings.nixDBPath + "/big-lock";
|
||
globalLock = openLockFile(globalLockPath.c_str(), true);
|
||
} catch (SysError & e) {
|
||
if (e.errNo != EACCES) throw;
|
||
settings.readOnlyMode = true;
|
||
openDB(false);
|
||
return;
|
||
}
|
||
|
||
if (!lockFile(globalLock, ltRead, false)) {
|
||
printMsg(lvlError, "waiting for the big store lock...");
|
||
lockFile(globalLock, ltRead, true);
|
||
}
|
||
|
||
/* Check the current database schema and if necessary do an
|
||
upgrade. */
|
||
int curSchema = getSchema();
|
||
if (curSchema > nixSchemaVersion)
|
||
throw Error(format("current store schema is version %1%, but I only support %2%")
|
||
% curSchema % nixSchemaVersion);
|
||
|
||
else if (curSchema == 0) { /* new store */
|
||
curSchema = nixSchemaVersion;
|
||
openDB(true);
|
||
writeFile(schemaPath, (format("%1%") % nixSchemaVersion).str());
|
||
}
|
||
|
||
else if (curSchema < nixSchemaVersion) {
|
||
/* Guix always used version 7 of the schema. */
|
||
throw Error(
|
||
format("Your store database uses an implausibly old schema, version %1%.")
|
||
% curSchema);
|
||
}
|
||
|
||
else openDB(false);
|
||
}
|
||
|
||
|
||
LocalStore::~LocalStore()
|
||
{
|
||
try {
|
||
if (fdTempRoots != -1) {
|
||
fdTempRoots.close();
|
||
unlink(fnTempRoots.c_str());
|
||
}
|
||
} catch (...) {
|
||
ignoreException();
|
||
}
|
||
}
|
||
|
||
|
||
int LocalStore::getSchema()
|
||
{
|
||
int curSchema = 0;
|
||
if (pathExists(schemaPath)) {
|
||
string s = readFile(schemaPath);
|
||
if (!string2Int(s, curSchema))
|
||
throw Error(format("`%1%' is corrupt") % schemaPath);
|
||
}
|
||
return curSchema;
|
||
}
|
||
|
||
|
||
void LocalStore::openDB(bool create)
|
||
{
|
||
if (access(settings.nixDBPath.c_str(), R_OK | W_OK))
|
||
throw SysError(format("store database directory `%1%' is not writable") % settings.nixDBPath);
|
||
|
||
/* Open the store database. */
|
||
string dbPath = settings.nixDBPath + "/db.sqlite";
|
||
if (sqlite3_open_v2(dbPath.c_str(), &db.db,
|
||
SQLITE_OPEN_READWRITE | (create ? SQLITE_OPEN_CREATE : 0), 0) != SQLITE_OK)
|
||
throw Error(format("cannot open store database `%1%'") % dbPath);
|
||
|
||
if (sqlite3_busy_timeout(db, 60 * 60 * 1000) != SQLITE_OK)
|
||
throwSQLiteError(db, "setting timeout");
|
||
|
||
if (sqlite3_exec(db, "pragma foreign_keys = 1;", 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "enabling foreign keys");
|
||
|
||
/* !!! check whether sqlite has been built with foreign key
|
||
support */
|
||
|
||
/* Whether SQLite should fsync(). "Normal" synchronous mode
|
||
should be safe enough. If the user asks for it, don't sync at
|
||
all. This can cause database corruption if the system
|
||
crashes. */
|
||
string syncMode = settings.fsyncMetadata ? "normal" : "off";
|
||
if (sqlite3_exec(db, ("pragma synchronous = " + syncMode + ";").c_str(), 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "setting synchronous mode");
|
||
|
||
/* Set the SQLite journal mode. WAL mode is fastest, so it's the
|
||
default. */
|
||
string mode = settings.useSQLiteWAL ? "wal" : "truncate";
|
||
string prevMode;
|
||
{
|
||
SQLiteStmt stmt;
|
||
stmt.create(db, "pragma main.journal_mode;");
|
||
if (sqlite3_step(stmt) != SQLITE_ROW)
|
||
throwSQLiteError(db, "querying journal mode");
|
||
prevMode = string((const char *) sqlite3_column_text(stmt, 0));
|
||
}
|
||
if (prevMode != mode &&
|
||
sqlite3_exec(db, ("pragma main.journal_mode = " + mode + ";").c_str(), 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "setting journal mode");
|
||
|
||
/* Increase the auto-checkpoint interval to 40000 pages. This
|
||
seems enough to ensure that instantiating the NixOS system
|
||
derivation is done in a single fsync(). */
|
||
if (mode == "wal" && sqlite3_exec(db, "pragma wal_autocheckpoint = 40000;", 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "setting autocheckpoint interval");
|
||
|
||
/* Initialise the database schema, if necessary. */
|
||
if (create) {
|
||
const char * schema =
|
||
#include "schema.sql.hh"
|
||
;
|
||
if (sqlite3_exec(db, (const char *) schema, 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "initialising database schema");
|
||
}
|
||
|
||
/* Prepare SQL statements. */
|
||
stmtRegisterValidPath.create(db,
|
||
"insert into ValidPaths (path, hash, registrationTime, deriver, narSize) values (?, ?, ?, ?, ?);");
|
||
stmtUpdatePathInfo.create(db,
|
||
"update ValidPaths set narSize = ?, hash = ? where path = ?;");
|
||
stmtAddReference.create(db,
|
||
"insert or replace into Refs (referrer, reference) values (?, ?);");
|
||
stmtQueryPathInfo.create(db,
|
||
"select id, hash, registrationTime, deriver, narSize from ValidPaths where path = ?;");
|
||
stmtQueryReferences.create(db,
|
||
"select path from Refs join ValidPaths on reference = id where referrer = ?;");
|
||
stmtQueryReferrers.create(db,
|
||
"select path from Refs join ValidPaths on referrer = id where reference = (select id from ValidPaths where path = ?);");
|
||
stmtInvalidatePath.create(db,
|
||
"delete from ValidPaths where path = ?;");
|
||
stmtRegisterFailedPath.create(db,
|
||
"insert or ignore into FailedPaths (path, time) values (?, ?);");
|
||
stmtHasPathFailed.create(db,
|
||
"select time from FailedPaths where path = ?;");
|
||
stmtQueryFailedPaths.create(db,
|
||
"select path from FailedPaths;");
|
||
// If the path is a derivation, then clear its outputs.
|
||
stmtClearFailedPath.create(db,
|
||
"delete from FailedPaths where ?1 = '*' or path = ?1 "
|
||
"or path in (select d.path from DerivationOutputs d join ValidPaths v on d.drv = v.id where v.path = ?1);");
|
||
stmtAddDerivationOutput.create(db,
|
||
"insert or replace into DerivationOutputs (drv, id, path) values (?, ?, ?);");
|
||
stmtQueryValidDerivers.create(db,
|
||
"select v.id, v.path from DerivationOutputs d join ValidPaths v on d.drv = v.id where d.path = ?;");
|
||
stmtQueryDerivationOutputs.create(db,
|
||
"select id, path from DerivationOutputs where drv = ?;");
|
||
// Use "path >= ?" with limit 1 rather than "path like '?%'" to
|
||
// ensure efficient lookup.
|
||
stmtQueryPathFromHashPart.create(db,
|
||
"select path from ValidPaths where path >= ? limit 1;");
|
||
stmtQueryValidPaths.create(db, "select path from ValidPaths");
|
||
}
|
||
|
||
|
||
/* To improve purity, users may want to make the store a read-only
|
||
bind mount. So make the store writable for this process. */
|
||
void LocalStore::makeStoreWritable()
|
||
{
|
||
#if HAVE_UNSHARE && HAVE_STATVFS && HAVE_SYS_MOUNT_H && defined(MS_BIND) && defined(MS_REMOUNT)
|
||
if (getuid() != 0) return;
|
||
/* Check if /nix/store is on a read-only mount. */
|
||
struct statvfs stat;
|
||
if (statvfs(settings.nixStore.c_str(), &stat) != 0)
|
||
throw SysError("getting info about the store mount point");
|
||
|
||
if (stat.f_flag & ST_RDONLY) {
|
||
if (unshare(CLONE_NEWNS) == -1)
|
||
throw SysError("setting up a private mount namespace");
|
||
|
||
if (mount(0, settings.nixStore.c_str(), "none", MS_REMOUNT | MS_BIND, 0) == -1)
|
||
throw SysError(format("remounting %1% writable") % settings.nixStore);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
|
||
const time_t mtimeStore = 1; /* 1 second into the epoch */
|
||
|
||
|
||
static void canonicaliseTimestampAndPermissions(const Path & path, const struct stat & st)
|
||
{
|
||
if (!S_ISLNK(st.st_mode)) {
|
||
|
||
/* Mask out all type related bits. */
|
||
mode_t mode = st.st_mode & ~S_IFMT;
|
||
|
||
if (mode != 0444 && mode != 0555) {
|
||
mode = (st.st_mode & S_IFMT)
|
||
| 0444
|
||
| (st.st_mode & S_IXUSR ? 0111 : 0);
|
||
if (chmod(path.c_str(), mode) == -1)
|
||
throw SysError(format("changing mode of `%1%' to %2$o") % path % mode);
|
||
}
|
||
|
||
}
|
||
|
||
if (st.st_mtime != mtimeStore) {
|
||
struct timeval times[2];
|
||
times[0].tv_sec = st.st_atime;
|
||
times[0].tv_usec = 0;
|
||
times[1].tv_sec = mtimeStore;
|
||
times[1].tv_usec = 0;
|
||
#if HAVE_LUTIMES
|
||
if (lutimes(path.c_str(), times) == -1)
|
||
if (errno != ENOSYS ||
|
||
(!S_ISLNK(st.st_mode) && utimes(path.c_str(), times) == -1))
|
||
#else
|
||
if (!S_ISLNK(st.st_mode) && utimes(path.c_str(), times) == -1)
|
||
#endif
|
||
throw SysError(format("changing modification time of `%1%'") % path);
|
||
}
|
||
}
|
||
|
||
|
||
void canonicaliseTimestampAndPermissions(const Path & path)
|
||
{
|
||
struct stat st;
|
||
if (lstat(path.c_str(), &st))
|
||
throw SysError(format("getting attributes of path `%1%'") % path);
|
||
canonicaliseTimestampAndPermissions(path, st);
|
||
}
|
||
|
||
|
||
static void canonicalisePathMetaData_(const Path & path, uid_t fromUid, InodesSeen & inodesSeen)
|
||
{
|
||
checkInterrupt();
|
||
|
||
struct stat st;
|
||
if (lstat(path.c_str(), &st))
|
||
throw SysError(format("getting attributes of path `%1%'") % path);
|
||
|
||
/* Really make sure that the path is of a supported type. */
|
||
if (!(S_ISREG(st.st_mode) || S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode)))
|
||
throw Error(format("file ‘%1%’ has an unsupported type") % path);
|
||
|
||
/* Fail if the file is not owned by the build user. This prevents
|
||
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(format("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
|
||
store (since that directory is group-writable for the 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(format("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(format("getting attributes of path `%1%'") % path);
|
||
|
||
if (st.st_uid != geteuid()) {
|
||
assert(S_ISLNK(st.st_mode));
|
||
throw Error(format("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 Path & drvPath, const Derivation & drv)
|
||
{
|
||
string drvName = storePathToName(drvPath);
|
||
assert(isDerivation(drvName));
|
||
drvName = string(drvName, 0, drvName.size() - drvExtension.size());
|
||
|
||
if (isFixedOutputDrv(drv)) {
|
||
DerivationOutputs::const_iterator out = drv.outputs.find("out");
|
||
if (out == drv.outputs.end())
|
||
throw Error(format("derivation `%1%' does not have an output named `out'") % drvPath);
|
||
|
||
bool recursive; HashType ht; Hash h;
|
||
out->second.parseHashInfo(recursive, ht, h);
|
||
Path outPath = makeFixedOutputPath(recursive, ht, h, drvName);
|
||
|
||
StringPairs::const_iterator j = drv.env.find("out");
|
||
if (out->second.path != outPath || j == drv.env.end() || j->second != outPath)
|
||
throw Error(format("derivation `%1%' has incorrect output `%2%', should be `%3%'")
|
||
% drvPath % out->second.path % outPath);
|
||
}
|
||
|
||
else {
|
||
Derivation drvCopy(drv);
|
||
foreach (DerivationOutputs::iterator, i, drvCopy.outputs) {
|
||
i->second.path = "";
|
||
drvCopy.env[i->first] = "";
|
||
}
|
||
|
||
Hash h = hashDerivationModulo(*this, drvCopy);
|
||
|
||
foreach (DerivationOutputs::const_iterator, i, drv.outputs) {
|
||
Path outPath = makeOutputPath(i->first, h, drvName);
|
||
StringPairs::const_iterator j = drv.env.find(i->first);
|
||
if (i->second.path != outPath || j == drv.env.end() || j->second != outPath)
|
||
throw Error(format("derivation `%1%' has incorrect output `%2%', should be `%3%'")
|
||
% drvPath % i->second.path % outPath);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
uint64_t LocalStore::addValidPath(const ValidPathInfo & info, bool checkOutputs)
|
||
{
|
||
stmtRegisterValidPath.use()
|
||
(info.path)
|
||
("sha256:" + printHash(info.hash))
|
||
(info.registrationTime == 0 ? time(0) : info.registrationTime)
|
||
(info.deriver, info.deriver != "")
|
||
(info.narSize, info.narSize != 0)
|
||
.exec();
|
||
uint64_t id = sqlite3_last_insert_rowid(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 (isDerivation(info.path)) {
|
||
Derivation 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) {
|
||
stmtAddDerivationOutput.use()
|
||
(id)
|
||
(i.first)
|
||
(i.second.path)
|
||
.exec();
|
||
}
|
||
}
|
||
|
||
return id;
|
||
}
|
||
|
||
|
||
void LocalStore::addReference(uint64_t referrer, uint64_t reference)
|
||
{
|
||
stmtAddReference.use()(referrer)(reference).exec();
|
||
}
|
||
|
||
|
||
void LocalStore::registerFailedPath(const Path & path)
|
||
{
|
||
retrySQLite<void>([&]() {
|
||
stmtRegisterFailedPath.use()(path)(time(0)).step();
|
||
});
|
||
}
|
||
|
||
|
||
bool LocalStore::hasPathFailed(const Path & path)
|
||
{
|
||
return retrySQLite<bool>([&]() {
|
||
return stmtHasPathFailed.use()(path).next();
|
||
});
|
||
}
|
||
|
||
|
||
PathSet LocalStore::queryFailedPaths()
|
||
{
|
||
return retrySQLite<PathSet>([&]() {
|
||
auto useQueryFailedPaths(stmtQueryFailedPaths.use());
|
||
|
||
PathSet res;
|
||
while (useQueryFailedPaths.next())
|
||
res.insert(useQueryFailedPaths.getStr(0));
|
||
|
||
return res;
|
||
});
|
||
}
|
||
|
||
|
||
void LocalStore::clearFailedPaths(const PathSet & paths)
|
||
{
|
||
retrySQLite<void>([&]() {
|
||
SQLiteTxn txn(db);
|
||
|
||
for (auto & path : paths)
|
||
stmtClearFailedPath.use()(path).exec();
|
||
|
||
txn.commit();
|
||
});
|
||
}
|
||
|
||
|
||
Hash parseHashField(const Path & path, const string & s)
|
||
{
|
||
string::size_type colon = s.find(':');
|
||
if (colon == string::npos)
|
||
throw Error(format("corrupt hash `%1%' in valid-path entry for `%2%'")
|
||
% s % path);
|
||
HashType ht = parseHashType(string(s, 0, colon));
|
||
if (ht == htUnknown)
|
||
throw Error(format("unknown hash type `%1%' in valid-path entry for `%2%'")
|
||
% string(s, 0, colon) % path);
|
||
return parseHash(ht, string(s, colon + 1));
|
||
}
|
||
|
||
|
||
ValidPathInfo LocalStore::queryPathInfo(const Path & path)
|
||
{
|
||
ValidPathInfo info;
|
||
info.path = path;
|
||
|
||
assertStorePath(path);
|
||
|
||
return retrySQLite<ValidPathInfo>([&]() {
|
||
|
||
/* Get the path info. */
|
||
auto useQueryPathInfo(stmtQueryPathInfo.use()(path));
|
||
|
||
if (!useQueryPathInfo.next())
|
||
throw Error(format("path `%1%' is not valid") % path);
|
||
|
||
info.id = useQueryPathInfo.getInt(0);
|
||
|
||
info.hash = parseHashField(path, useQueryPathInfo.getStr(1));
|
||
|
||
info.registrationTime = useQueryPathInfo.getInt(2);
|
||
|
||
auto s = (const char *) sqlite3_column_text(stmtQueryPathInfo, 3);
|
||
if (s) info.deriver = s;
|
||
|
||
/* Note that narSize = NULL yields 0. */
|
||
info.narSize = useQueryPathInfo.getInt(4);
|
||
|
||
/* Get the references. */
|
||
auto useQueryReferences(stmtQueryReferences.use()(info.id));
|
||
|
||
while (useQueryReferences.next())
|
||
info.references.insert(useQueryReferences.getStr(0));
|
||
|
||
return info;
|
||
});
|
||
}
|
||
|
||
|
||
/* Update path info in the database. Currently only updates the
|
||
narSize field. */
|
||
void LocalStore::updatePathInfo(const ValidPathInfo & info)
|
||
{
|
||
stmtUpdatePathInfo.use()
|
||
(info.narSize, info.narSize != 0)
|
||
("sha256:" + printHash(info.hash))
|
||
(info.path)
|
||
.exec();
|
||
}
|
||
|
||
|
||
uint64_t LocalStore::queryValidPathId(const Path & path)
|
||
{
|
||
auto use(stmtQueryPathInfo.use()(path));
|
||
if (!use.next())
|
||
throw Error(format("path ‘%1%’ is not valid") % path);
|
||
return use.getInt(0);
|
||
}
|
||
|
||
|
||
bool LocalStore::isValidPath_(const Path & path)
|
||
{
|
||
return stmtQueryPathInfo.use()(path).next();
|
||
}
|
||
|
||
|
||
bool LocalStore::isValidPath(const Path & path)
|
||
{
|
||
return retrySQLite<bool>([&]() {
|
||
return isValidPath_(path);
|
||
});
|
||
}
|
||
|
||
|
||
PathSet LocalStore::queryValidPaths(const PathSet & paths)
|
||
{
|
||
return retrySQLite<PathSet>([&]() {
|
||
PathSet res;
|
||
foreach (PathSet::const_iterator, i, paths)
|
||
if (isValidPath_(*i)) res.insert(*i);
|
||
return res;
|
||
});
|
||
}
|
||
|
||
|
||
PathSet LocalStore::queryAllValidPaths()
|
||
{
|
||
return retrySQLite<PathSet>([&]() {
|
||
auto use(stmtQueryValidPaths.use());
|
||
PathSet res;
|
||
while (use.next()) res.insert(use.getStr(0));
|
||
return res;
|
||
});
|
||
}
|
||
|
||
|
||
void LocalStore::queryReferences(const Path & path,
|
||
PathSet & references)
|
||
{
|
||
ValidPathInfo info = queryPathInfo(path);
|
||
references.insert(info.references.begin(), info.references.end());
|
||
}
|
||
|
||
|
||
void LocalStore::queryReferrers_(const Path & path, PathSet & referrers)
|
||
{
|
||
auto useQueryReferrers(stmtQueryReferrers.use()(path));
|
||
|
||
while (useQueryReferrers.next())
|
||
referrers.insert(useQueryReferrers.getStr(0));
|
||
}
|
||
|
||
|
||
void LocalStore::queryReferrers(const Path & path, PathSet & referrers)
|
||
{
|
||
assertStorePath(path);
|
||
return retrySQLite<void>([&]() {
|
||
queryReferrers_(path, referrers);
|
||
});
|
||
}
|
||
|
||
|
||
Path LocalStore::queryDeriver(const Path & path)
|
||
{
|
||
return queryPathInfo(path).deriver;
|
||
}
|
||
|
||
|
||
PathSet LocalStore::queryValidDerivers(const Path & path)
|
||
{
|
||
assertStorePath(path);
|
||
|
||
return retrySQLite<PathSet>([&]() {
|
||
auto useQueryValidDerivers(stmtQueryValidDerivers.use()(path));
|
||
|
||
PathSet derivers;
|
||
while (useQueryValidDerivers.next())
|
||
derivers.insert(useQueryValidDerivers.getStr(1));
|
||
|
||
return derivers;
|
||
});
|
||
}
|
||
|
||
|
||
PathSet LocalStore::queryDerivationOutputs(const Path & path)
|
||
{
|
||
return retrySQLite<PathSet>([&]() {
|
||
auto useQueryDerivationOutputs(stmtQueryDerivationOutputs.use()(queryValidPathId(path)));
|
||
|
||
PathSet outputs;
|
||
while (useQueryDerivationOutputs.next())
|
||
outputs.insert(useQueryDerivationOutputs.getStr(1));
|
||
|
||
return outputs;
|
||
});
|
||
}
|
||
|
||
|
||
StringSet LocalStore::queryDerivationOutputNames(const Path & path)
|
||
{
|
||
return retrySQLite<StringSet>([&]() {
|
||
auto useQueryDerivationOutputs(stmtQueryDerivationOutputs.use()(queryValidPathId(path)));
|
||
|
||
StringSet outputNames;
|
||
while (useQueryDerivationOutputs.next())
|
||
outputNames.insert(useQueryDerivationOutputs.getStr(0));
|
||
|
||
return outputNames;
|
||
});
|
||
}
|
||
|
||
|
||
Path LocalStore::queryPathFromHashPart(const string & hashPart)
|
||
{
|
||
if (hashPart.size() != 32) throw Error("invalid hash part");
|
||
|
||
Path prefix = settings.nixStore + "/" + hashPart;
|
||
|
||
return retrySQLite<Path>([&]() -> Path {
|
||
auto useQueryPathFromHashPart(stmtQueryPathFromHashPart.use()(prefix));
|
||
|
||
if (!useQueryPathFromHashPart.next()) return "";
|
||
|
||
const char * s = (const char *) sqlite3_column_text(stmtQueryPathFromHashPart, 0);
|
||
return s && prefix.compare(0, prefix.size(), s, prefix.size()) == 0 ? s : "";
|
||
});
|
||
}
|
||
|
||
/* Read a line from the substituter's reply file descriptor, while also
|
||
processing its stderr. */
|
||
string LocalStore::getLineFromSubstituter(Agent & run)
|
||
{
|
||
string res, err;
|
||
|
||
while (1) {
|
||
checkInterrupt();
|
||
|
||
fd_set fds;
|
||
FD_ZERO(&fds);
|
||
FD_SET(run.fromAgent.readSide, &fds);
|
||
FD_SET(run.builderOut.readSide, &fds);
|
||
|
||
/* Wait for data to appear on the substituter's stdout or
|
||
stderr. */
|
||
if (select(std::max(run.fromAgent.readSide, run.builderOut.readSide) + 1, &fds, 0, 0, 0) == -1) {
|
||
if (errno == EINTR) continue;
|
||
throw SysError("waiting for input from the substituter");
|
||
}
|
||
|
||
/* Completely drain stderr before dealing with stdout. */
|
||
if (FD_ISSET(run.fromAgent.readSide, &fds)) {
|
||
char buf[4096];
|
||
ssize_t n = read(run.fromAgent.readSide, (unsigned char *) buf, sizeof(buf));
|
||
if (n == -1) {
|
||
if (errno == EINTR) continue;
|
||
throw SysError("reading from substituter's stderr");
|
||
}
|
||
if (n == 0) throw EndOfFile(format("`%1% substitute' died unexpectedly")
|
||
% settings.guixProgram);
|
||
err.append(buf, n);
|
||
string::size_type p;
|
||
while (((p = err.find('\n')) != string::npos)
|
||
|| ((p = err.find('\r')) != string::npos)) {
|
||
string thing(err, 0, p + 1);
|
||
writeToStderr("substitute: " + thing);
|
||
err = string(err, p + 1);
|
||
}
|
||
}
|
||
|
||
/* Read from stdout until we get a newline or the buffer is empty. */
|
||
else if (FD_ISSET(run.builderOut.readSide, &fds)) {
|
||
unsigned char c;
|
||
readFull(run.builderOut.readSide, (unsigned char *) &c, 1);
|
||
if (c == '\n') {
|
||
if (!err.empty()) printMsg(lvlError, "substitute: " + err);
|
||
return res;
|
||
}
|
||
res += c;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
template<class T> T LocalStore::getIntLineFromSubstituter(Agent & run)
|
||
{
|
||
string s = getLineFromSubstituter(run);
|
||
T res;
|
||
if (!string2Int(s, res))
|
||
throw Error(format("integer expected from stream: %1%") % s);
|
||
return res;
|
||
}
|
||
|
||
|
||
PathSet LocalStore::querySubstitutablePaths(const PathSet & paths)
|
||
{
|
||
PathSet res;
|
||
|
||
if (!settings.useSubstitutes || paths.empty()) return res;
|
||
|
||
Agent & run = *substituter();
|
||
|
||
string s = "have ";
|
||
foreach (PathSet::const_iterator, j, paths)
|
||
if (res.find(*j) == res.end()) { s += *j; s += " "; }
|
||
writeLine(run.toAgent.writeSide, s);
|
||
while (true) {
|
||
/* FIXME: we only read stderr when an error occurs, so
|
||
substituters should only write (short) messages to
|
||
stderr when they fail. I.e. they shouldn't write debug
|
||
output. */
|
||
Path path = getLineFromSubstituter(run);
|
||
if (path == "") break;
|
||
res.insert(path);
|
||
}
|
||
|
||
return res;
|
||
}
|
||
|
||
|
||
std::shared_ptr<Agent> LocalStore::substituter()
|
||
{
|
||
if (!runningSubstituter) {
|
||
const Strings args = { "substitute", "--query" };
|
||
const std::map<string, string> env = { { "_NIX_OPTIONS", settings.pack() } };
|
||
runningSubstituter = std::make_shared<Agent>(settings.guixProgram, args, env);
|
||
}
|
||
|
||
return runningSubstituter;
|
||
}
|
||
|
||
void LocalStore::querySubstitutablePathInfos(PathSet & paths, SubstitutablePathInfos & infos)
|
||
{
|
||
if (!settings.useSubstitutes) return;
|
||
|
||
Agent & run = *substituter();
|
||
|
||
string s = "info ";
|
||
foreach (PathSet::const_iterator, i, paths)
|
||
if (infos.find(*i) == infos.end()) { s += *i; s += " "; }
|
||
writeLine(run.toAgent.writeSide, s);
|
||
|
||
while (true) {
|
||
Path path = getLineFromSubstituter(run);
|
||
if (path == "") break;
|
||
if (paths.find(path) == paths.end())
|
||
throw Error(format("got unexpected path `%1%' from substituter") % path);
|
||
paths.erase(path);
|
||
SubstitutablePathInfo & info(infos[path]);
|
||
info.deriver = getLineFromSubstituter(run);
|
||
if (info.deriver != "") assertStorePath(info.deriver);
|
||
int nrRefs = getIntLineFromSubstituter<int>(run);
|
||
while (nrRefs--) {
|
||
Path p = getLineFromSubstituter(run);
|
||
assertStorePath(p);
|
||
info.references.insert(p);
|
||
}
|
||
info.downloadSize = getIntLineFromSubstituter<unsigned long long>(run);
|
||
info.narSize = getIntLineFromSubstituter<unsigned long long>(run);
|
||
}
|
||
}
|
||
|
||
|
||
void LocalStore::querySubstitutablePathInfos(const PathSet & paths,
|
||
SubstitutablePathInfos & infos)
|
||
{
|
||
if (!paths.empty()) {
|
||
PathSet todo = paths;
|
||
querySubstitutablePathInfos(todo, infos);
|
||
}
|
||
}
|
||
|
||
|
||
Hash LocalStore::queryPathHash(const Path & path)
|
||
{
|
||
return queryPathInfo(path).hash;
|
||
}
|
||
|
||
|
||
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>([&]() {
|
||
SQLiteTxn txn(db);
|
||
PathSet paths;
|
||
|
||
foreach (ValidPathInfos::const_iterator, i, infos) {
|
||
assert(i->hash.type == htSHA256);
|
||
if (isValidPath_(i->path))
|
||
updatePathInfo(*i);
|
||
else
|
||
addValidPath(*i, false);
|
||
paths.insert(i->path);
|
||
}
|
||
|
||
for (auto & i : infos) {
|
||
auto referrer = queryValidPathId(i.path);
|
||
for (auto & j : i.references)
|
||
addReference(referrer, queryValidPathId(j));
|
||
}
|
||
|
||
/* Check that the derivation outputs are correct. We can't do
|
||
this in addValidPath() above, because the references might
|
||
not be valid yet. */
|
||
foreach (ValidPathInfos::const_iterator, i, infos)
|
||
if (isDerivation(i->path)) {
|
||
// FIXME: inefficient; we already loaded the
|
||
// derivation in addValidPath().
|
||
Derivation drv = readDerivation(i->path);
|
||
checkDerivationOutputs(i->path, drv);
|
||
}
|
||
|
||
/* 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(*this, paths);
|
||
|
||
txn.commit();
|
||
});
|
||
}
|
||
|
||
|
||
/* Invalidate a path. The caller is responsible for checking that
|
||
there are no referrers. */
|
||
void LocalStore::invalidatePath(const Path & path)
|
||
{
|
||
debug(format("invalidating path `%1%'") % path);
|
||
|
||
drvHashes.erase(path);
|
||
|
||
stmtInvalidatePath.use()(path).exec();
|
||
|
||
/* Note that the foreign key constraints on the Refs table take
|
||
care of deleting the references entries for `path'. */
|
||
}
|
||
|
||
|
||
Path LocalStore::addToStoreFromDump(const string & dump, const string & name,
|
||
bool recursive, HashType hashAlgo, bool repair)
|
||
{
|
||
Hash h = hashString(hashAlgo, dump);
|
||
|
||
Path dstPath = makeFixedOutputPath(recursive, hashAlgo, h, name);
|
||
|
||
addTempRoot(dstPath);
|
||
|
||
if (repair || !isValidPath(dstPath)) {
|
||
|
||
/* The first check above is an optimisation to prevent
|
||
unnecessary lock acquisition. */
|
||
|
||
PathLocks outputLock(singleton<PathSet, Path>(dstPath));
|
||
|
||
if (repair || !isValidPath(dstPath)) {
|
||
|
||
if (pathExists(dstPath)) deletePath(dstPath);
|
||
|
||
if (recursive) {
|
||
StringSource source(dump);
|
||
restorePath(dstPath, source);
|
||
} else
|
||
writeFile(dstPath, dump);
|
||
|
||
canonicalisePathMetaData(dstPath, -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 (recursive) {
|
||
hash.first = hashAlgo == htSHA256 ? h : hashString(htSHA256, dump);
|
||
hash.second = dump.size();
|
||
} else
|
||
hash = hashPath(htSHA256, dstPath);
|
||
|
||
optimisePath(dstPath); // FIXME: combine with hashPath()
|
||
|
||
ValidPathInfo info;
|
||
info.path = dstPath;
|
||
info.hash = hash.first;
|
||
info.narSize = hash.second;
|
||
registerValidPath(info);
|
||
}
|
||
|
||
outputLock.setDeletion(true);
|
||
}
|
||
|
||
return dstPath;
|
||
}
|
||
|
||
|
||
Path LocalStore::addToStore(const string & name, const Path & _srcPath,
|
||
bool recursive, HashType hashAlgo, PathFilter & filter, bool repair)
|
||
{
|
||
Path srcPath(absPath(_srcPath));
|
||
debug(format("adding `%1%' to the store") % srcPath);
|
||
|
||
/* Read the whole path into memory. This is not a very scalable
|
||
method for very large paths, but `copyPath' is mainly used for
|
||
small files. */
|
||
StringSink sink;
|
||
if (recursive)
|
||
dumpPath(srcPath, sink, filter);
|
||
else
|
||
sink.s = readFile(srcPath);
|
||
|
||
return addToStoreFromDump(sink.s, name, recursive, hashAlgo, repair);
|
||
}
|
||
|
||
|
||
Path LocalStore::addTextToStore(const string & name, const string & s,
|
||
const PathSet & references, bool repair)
|
||
{
|
||
Path dstPath = computeStorePathForText(name, s, references);
|
||
|
||
addTempRoot(dstPath);
|
||
|
||
if (repair || !isValidPath(dstPath)) {
|
||
|
||
PathLocks outputLock(singleton<PathSet, Path>(dstPath));
|
||
|
||
if (repair || !isValidPath(dstPath)) {
|
||
|
||
if (pathExists(dstPath)) deletePath(dstPath);
|
||
|
||
writeFile(dstPath, s);
|
||
|
||
canonicalisePathMetaData(dstPath, -1);
|
||
|
||
HashResult hash = hashPath(htSHA256, dstPath);
|
||
|
||
optimisePath(dstPath);
|
||
|
||
ValidPathInfo info;
|
||
info.path = dstPath;
|
||
info.hash = hash.first;
|
||
info.narSize = hash.second;
|
||
info.references = references;
|
||
registerValidPath(info);
|
||
}
|
||
|
||
outputLock.setDeletion(true);
|
||
}
|
||
|
||
return dstPath;
|
||
}
|
||
|
||
|
||
struct HashAndWriteSink : Sink
|
||
{
|
||
Sink & writeSink;
|
||
HashSink hashSink;
|
||
HashAndWriteSink(Sink & writeSink) : writeSink(writeSink), hashSink(htSHA256)
|
||
{
|
||
}
|
||
virtual void operator () (const unsigned char * data, size_t len)
|
||
{
|
||
writeSink(data, len);
|
||
hashSink(data, len);
|
||
}
|
||
Hash currentHash()
|
||
{
|
||
return hashSink.currentHash().first;
|
||
}
|
||
};
|
||
|
||
|
||
#define EXPORT_MAGIC 0x4558494e
|
||
|
||
|
||
static void checkSecrecy(const Path & path)
|
||
{
|
||
struct stat st;
|
||
if (stat(path.c_str(), &st))
|
||
throw SysError(format("getting status of `%1%'") % path);
|
||
if ((st.st_mode & (S_IRWXG | S_IRWXO)) != 0)
|
||
throw Error(format("file `%1%' should be secret (inaccessible to everybody else)!") % path);
|
||
}
|
||
|
||
|
||
/* Return the authentication agent, a "guix authenticate" process started
|
||
lazily. */
|
||
static std::shared_ptr<Agent> authenticationAgent()
|
||
{
|
||
static std::shared_ptr<Agent> agent;
|
||
|
||
if (!agent) {
|
||
Strings args = { "authenticate" };
|
||
agent = std::make_shared<Agent>(settings.guixProgram, args);
|
||
}
|
||
|
||
return agent;
|
||
}
|
||
|
||
/* Read an integer and the byte that immediately follows it from FD. Return
|
||
the integer. */
|
||
static int readInteger(int fd)
|
||
{
|
||
string str;
|
||
|
||
while (1) {
|
||
char ch;
|
||
ssize_t rd = read(fd, &ch, 1);
|
||
if (rd == -1) {
|
||
if (errno != EINTR)
|
||
throw SysError("reading an integer");
|
||
} else if (rd == 0)
|
||
throw EndOfFile("unexpected EOF reading an integer");
|
||
else {
|
||
if (isdigit(ch)) {
|
||
str += ch;
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return stoi(str);
|
||
}
|
||
|
||
/* Read from FD a reply coming from 'guix authenticate'. The reply has the
|
||
form "CODE LEN:STR". CODE is an integer, where zero indicates success.
|
||
LEN specifies the length in bytes of the string that immediately
|
||
follows. */
|
||
static std::string readAuthenticateReply(int fd)
|
||
{
|
||
int code = readInteger(fd);
|
||
int len = readInteger(fd);
|
||
|
||
string str;
|
||
str.resize(len);
|
||
readFull(fd, (unsigned char *) &str[0], len);
|
||
|
||
if (code == 0)
|
||
return str;
|
||
else
|
||
throw Error(str);
|
||
}
|
||
|
||
/* Sign HASH with the key stored in file SECRETKEY. Return the signature as a
|
||
string, or raise an exception upon error. */
|
||
static std::string signHash(const string &secretKey, const Hash &hash)
|
||
{
|
||
auto agent = authenticationAgent();
|
||
auto hexHash = printHash(hash);
|
||
|
||
writeLine(agent->toAgent.writeSide,
|
||
(format("sign %1%:%2% %3%:%4%")
|
||
% secretKey.size() % secretKey
|
||
% hexHash.size() % hexHash).str());
|
||
|
||
return readAuthenticateReply(agent->fromAgent.readSide);
|
||
}
|
||
|
||
/* Verify SIGNATURE and return the base16-encoded hash over which it was
|
||
computed. */
|
||
static std::string verifySignature(const string &signature)
|
||
{
|
||
auto agent = authenticationAgent();
|
||
|
||
writeLine(agent->toAgent.writeSide,
|
||
(format("verify %1%:%2%")
|
||
% signature.size() % signature).str());
|
||
|
||
return readAuthenticateReply(agent->fromAgent.readSide);
|
||
}
|
||
|
||
void LocalStore::exportPath(const Path & path, bool sign,
|
||
Sink & sink)
|
||
{
|
||
assertStorePath(path);
|
||
|
||
printMsg(lvlInfo, format("exporting path `%1%'") % path);
|
||
|
||
if (!isValidPath(path))
|
||
throw Error(format("path `%1%' is not valid") % path);
|
||
|
||
HashAndWriteSink hashAndWriteSink(sink);
|
||
|
||
dumpPath(path, hashAndWriteSink);
|
||
|
||
/* Refuse to export paths that have changed. This prevents
|
||
filesystem corruption from spreading to other machines.
|
||
Don't complain if the stored hash is zero (unknown). */
|
||
Hash hash = hashAndWriteSink.currentHash();
|
||
Hash storedHash = queryPathHash(path);
|
||
if (hash != storedHash && storedHash != Hash(storedHash.type))
|
||
throw Error(format("hash of path `%1%' has changed from `%2%' to `%3%'!") % path
|
||
% printHash(storedHash) % printHash(hash));
|
||
|
||
writeInt(EXPORT_MAGIC, hashAndWriteSink);
|
||
|
||
writeString(path, hashAndWriteSink);
|
||
|
||
PathSet references;
|
||
queryReferences(path, references);
|
||
writeStrings(references, hashAndWriteSink);
|
||
|
||
Path deriver = queryDeriver(path);
|
||
writeString(deriver, hashAndWriteSink);
|
||
|
||
if (sign) {
|
||
Hash hash = hashAndWriteSink.currentHash();
|
||
|
||
writeInt(1, hashAndWriteSink);
|
||
|
||
Path secretKey = settings.nixConfDir + "/signing-key.sec";
|
||
checkSecrecy(secretKey);
|
||
|
||
string signature = signHash(secretKey, hash);
|
||
|
||
writeString(signature, hashAndWriteSink);
|
||
|
||
} else
|
||
writeInt(0, hashAndWriteSink);
|
||
}
|
||
|
||
|
||
struct HashAndReadSource : Source
|
||
{
|
||
Source & readSource;
|
||
HashSink hashSink;
|
||
bool hashing;
|
||
HashAndReadSource(Source & readSource) : readSource(readSource), hashSink(htSHA256)
|
||
{
|
||
hashing = true;
|
||
}
|
||
size_t read(unsigned char * data, size_t len)
|
||
{
|
||
size_t n = readSource.read(data, len);
|
||
if (hashing) hashSink(data, n);
|
||
return n;
|
||
}
|
||
};
|
||
|
||
|
||
/* 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(settings.nixStore);
|
||
addTempRoot(tmpDir);
|
||
} while (!pathExists(tmpDir));
|
||
return tmpDir;
|
||
}
|
||
|
||
|
||
Path LocalStore::importPath(bool requireSignature, Source & source)
|
||
{
|
||
HashAndReadSource hashAndReadSource(source);
|
||
|
||
/* We don't yet know what store path this archive contains (the
|
||
store path follows the archive data proper), and besides, we
|
||
don't know yet whether the signature is valid. */
|
||
Path tmpDir = createTempDirInStore();
|
||
AutoDelete delTmp(tmpDir);
|
||
Path unpacked = tmpDir + "/unpacked";
|
||
|
||
restorePath(unpacked, hashAndReadSource);
|
||
|
||
unsigned int magic = readInt(hashAndReadSource);
|
||
if (magic != EXPORT_MAGIC)
|
||
throw Error("normalized archive cannot be imported; wrong format");
|
||
|
||
Path dstPath = readStorePath(hashAndReadSource);
|
||
|
||
PathSet references = readStorePaths<PathSet>(hashAndReadSource);
|
||
|
||
Path deriver = readString(hashAndReadSource);
|
||
if (deriver != "") assertStorePath(deriver);
|
||
|
||
Hash hash = hashAndReadSource.hashSink.finish().first;
|
||
hashAndReadSource.hashing = false;
|
||
|
||
bool haveSignature = readInt(hashAndReadSource) == 1;
|
||
|
||
if (requireSignature && !haveSignature)
|
||
throw Error(format("imported archive of `%1%' lacks a signature") % dstPath);
|
||
|
||
if (haveSignature) {
|
||
string signature = readString(hashAndReadSource);
|
||
|
||
if (requireSignature) {
|
||
string hash2 = verifySignature(signature);
|
||
|
||
/* Note: runProgram() throws an exception if the signature
|
||
is invalid. */
|
||
|
||
if (printHash(hash) != hash2)
|
||
throw Error(
|
||
"signed hash doesn't match actual contents of imported "
|
||
"archive; archive could be corrupt, or someone is trying "
|
||
"to import a Trojan horse");
|
||
}
|
||
}
|
||
|
||
/* Do the actual import. */
|
||
|
||
/* !!! way too much code duplication with addTextToStore() etc. */
|
||
addTempRoot(dstPath);
|
||
|
||
if (!isValidPath(dstPath)) {
|
||
|
||
PathLocks outputLock;
|
||
|
||
/* 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). */
|
||
Strings locksHeld = tokenizeString<Strings>(getEnv("NIX_HELD_LOCKS"));
|
||
if (find(locksHeld.begin(), locksHeld.end(), dstPath) == locksHeld.end())
|
||
outputLock.lockPaths(singleton<PathSet, Path>(dstPath));
|
||
|
||
if (!isValidPath(dstPath)) {
|
||
|
||
if (pathExists(dstPath)) deletePath(dstPath);
|
||
|
||
if (rename(unpacked.c_str(), dstPath.c_str()) == -1)
|
||
throw SysError(format("cannot move `%1%' to `%2%'")
|
||
% unpacked % dstPath);
|
||
|
||
canonicalisePathMetaData(dstPath, -1);
|
||
|
||
/* !!! if we were clever, we could prevent the hashPath()
|
||
here. */
|
||
HashResult hash = hashPath(htSHA256, dstPath);
|
||
|
||
optimisePath(dstPath); // FIXME: combine with hashPath()
|
||
|
||
ValidPathInfo info;
|
||
info.path = dstPath;
|
||
info.hash = hash.first;
|
||
info.narSize = hash.second;
|
||
info.references = references;
|
||
info.deriver = deriver != "" && isValidPath(deriver) ? deriver : "";
|
||
registerValidPath(info);
|
||
}
|
||
|
||
outputLock.setDeletion(true);
|
||
}
|
||
|
||
return dstPath;
|
||
}
|
||
|
||
|
||
Paths LocalStore::importPaths(bool requireSignature, Source & source)
|
||
{
|
||
Paths res;
|
||
while (true) {
|
||
unsigned long long n = readLongLong(source);
|
||
if (n == 0) break;
|
||
if (n != 1) throw Error("input doesn't look like something created by `nix-store --export'");
|
||
res.push_back(importPath(requireSignature, source));
|
||
}
|
||
return res;
|
||
}
|
||
|
||
|
||
void LocalStore::invalidatePathChecked(const Path & path)
|
||
{
|
||
assertStorePath(path);
|
||
|
||
retrySQLite<void>([&]() {
|
||
SQLiteTxn txn(db);
|
||
|
||
if (isValidPath_(path)) {
|
||
PathSet referrers; queryReferrers_(path, referrers);
|
||
referrers.erase(path); /* ignore self-references */
|
||
if (!referrers.empty())
|
||
throw PathInUse(format("cannot delete path `%1%' because it is in use by %2%")
|
||
% path % showPaths(referrers));
|
||
invalidatePath(path);
|
||
}
|
||
|
||
txn.commit();
|
||
});
|
||
}
|
||
|
||
|
||
bool LocalStore::verifyStore(bool checkContents, bool repair)
|
||
{
|
||
printMsg(lvlError, format("reading the store..."));
|
||
|
||
bool errors = false;
|
||
|
||
/* Acquire the global GC lock to prevent a garbage collection. */
|
||
AutoCloseFD fdGCLock = openGCLock(ltWrite);
|
||
|
||
PathSet store;
|
||
for (auto & i : readDirectory(settings.nixStore)) store.insert(i.name);
|
||
|
||
/* Check whether all valid paths actually exist. */
|
||
printMsg(lvlInfo, "checking path existence...");
|
||
|
||
PathSet validPaths2 = queryAllValidPaths(), validPaths, done;
|
||
|
||
foreach (PathSet::iterator, i, validPaths2)
|
||
verifyPath(*i, store, done, validPaths, repair, errors);
|
||
|
||
/* Release the GC lock so that checking content hashes (which can
|
||
take ages) doesn't block the GC or builds. */
|
||
fdGCLock.close();
|
||
|
||
/* Optionally, check the content hashes (slow). */
|
||
if (checkContents) {
|
||
printMsg(lvlInfo, "checking hashes...");
|
||
|
||
Hash nullHash(htSHA256);
|
||
|
||
foreach (PathSet::iterator, i, validPaths) {
|
||
try {
|
||
ValidPathInfo info = queryPathInfo(*i);
|
||
|
||
/* Check the content hash (optionally - slow). */
|
||
printMsg(lvlTalkative, format("checking contents of `%1%'") % *i);
|
||
HashResult current = hashPath(info.hash.type, *i);
|
||
|
||
if (info.hash != nullHash && info.hash != current.first) {
|
||
printMsg(lvlError, format("path `%1%' was modified! "
|
||
"expected hash `%2%', got `%3%'")
|
||
% *i % printHash(info.hash) % printHash(current.first));
|
||
if (repair) repairPath(*i); else errors = true;
|
||
} else {
|
||
|
||
bool update = false;
|
||
|
||
/* Fill in missing hashes. */
|
||
if (info.hash == nullHash) {
|
||
printMsg(lvlError, format("fixing missing hash on `%1%'") % *i);
|
||
info.hash = current.first;
|
||
update = true;
|
||
}
|
||
|
||
/* Fill in missing narSize fields (from old stores). */
|
||
if (info.narSize == 0) {
|
||
printMsg(lvlError, format("updating size field on `%1%' to %2%") % *i % current.second);
|
||
info.narSize = current.second;
|
||
update = true;
|
||
}
|
||
|
||
if (update) updatePathInfo(info);
|
||
|
||
}
|
||
|
||
} catch (Error & e) {
|
||
/* It's possible that the path got GC'ed, so ignore
|
||
errors on invalid paths. */
|
||
if (isValidPath(*i))
|
||
printMsg(lvlError, format("error: %1%") % e.msg());
|
||
else
|
||
printMsg(lvlError, format("warning: %1%") % e.msg());
|
||
errors = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
return errors;
|
||
}
|
||
|
||
|
||
void LocalStore::verifyPath(const Path & path, const PathSet & store,
|
||
PathSet & done, PathSet & validPaths, bool repair, bool & errors)
|
||
{
|
||
checkInterrupt();
|
||
|
||
if (done.find(path) != done.end()) return;
|
||
done.insert(path);
|
||
|
||
if (!isStorePath(path)) {
|
||
printMsg(lvlError, format("path `%1%' is not in the store") % path);
|
||
invalidatePath(path);
|
||
return;
|
||
}
|
||
|
||
if (store.find(baseNameOf(path)) == store.end()) {
|
||
/* Check any referrers first. If we can invalidate them
|
||
first, then we can invalidate this path as well. */
|
||
bool canInvalidate = true;
|
||
PathSet referrers; queryReferrers(path, referrers);
|
||
foreach (PathSet::iterator, i, referrers)
|
||
if (*i != path) {
|
||
verifyPath(*i, store, done, validPaths, repair, errors);
|
||
if (validPaths.find(*i) != validPaths.end())
|
||
canInvalidate = false;
|
||
}
|
||
|
||
if (canInvalidate) {
|
||
printMsg(lvlError, format("path `%1%' disappeared, removing from database...") % path);
|
||
invalidatePath(path);
|
||
} else {
|
||
printMsg(lvlError, format("path `%1%' disappeared, but it still has valid referrers!") % path);
|
||
if (repair)
|
||
try {
|
||
repairPath(path);
|
||
} catch (Error & e) {
|
||
printMsg(lvlError, format("warning: %1%") % e.msg());
|
||
errors = true;
|
||
}
|
||
else errors = true;
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
validPaths.insert(path);
|
||
}
|
||
|
||
|
||
bool LocalStore::pathContentsGood(const Path & path)
|
||
{
|
||
std::map<Path, bool>::iterator i = pathContentsGoodCache.find(path);
|
||
if (i != pathContentsGoodCache.end()) return i->second;
|
||
printMsg(lvlInfo, format("checking path `%1%'...") % path);
|
||
ValidPathInfo info = queryPathInfo(path);
|
||
bool res;
|
||
if (!pathExists(path))
|
||
res = false;
|
||
else {
|
||
HashResult current = hashPath(info.hash.type, path);
|
||
Hash nullHash(htSHA256);
|
||
res = info.hash == nullHash || info.hash == current.first;
|
||
}
|
||
pathContentsGoodCache[path] = res;
|
||
if (!res) printMsg(lvlError, format("path `%1%' is corrupted or missing!") % path);
|
||
return res;
|
||
}
|
||
|
||
|
||
void LocalStore::markContentsGood(const Path & path)
|
||
{
|
||
pathContentsGoodCache[path] = true;
|
||
}
|
||
|
||
|
||
void LocalStore::vacuumDB()
|
||
{
|
||
if (sqlite3_exec(db, "vacuum;", 0, 0, 0) != SQLITE_OK)
|
||
throwSQLiteError(db, "vacuuming SQLite database");
|
||
}
|
||
|
||
|
||
void LocalStore::createUser(const std::string & userName, uid_t userId)
|
||
{
|
||
auto dir = settings.nixStateDir + "/profiles/per-user/" + userName;
|
||
|
||
createDirs(dir);
|
||
if (chmod(dir.c_str(), 0755) == -1)
|
||
throw SysError(format("changing permissions of directory '%s'") % dir);
|
||
if (chown(dir.c_str(), userId, -1) == -1)
|
||
throw SysError(format("changing owner of directory '%s'") % dir);
|
||
}
|
||
|
||
|
||
}
|