forked from lix-project/lix
8be1979f1a
We don't need this anymore now that current filesystems support more than 32,000 files in a directory.
538 lines
13 KiB
C++
538 lines
13 KiB
C++
#include "serialise.hh"
|
|
#include "util.hh"
|
|
#include "remote-store.hh"
|
|
#include "worker-protocol.hh"
|
|
#include "archive.hh"
|
|
#include "globals.hh"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <iostream>
|
|
#include <unistd.h>
|
|
#include <cstring>
|
|
|
|
|
|
namespace nix {
|
|
|
|
|
|
Path readStorePath(Source & from)
|
|
{
|
|
Path path = readString(from);
|
|
assertStorePath(path);
|
|
return path;
|
|
}
|
|
|
|
|
|
template<class T> T readStorePaths(Source & from)
|
|
{
|
|
T paths = readStrings<T>(from);
|
|
foreach (typename T::iterator, i, paths) assertStorePath(*i);
|
|
return paths;
|
|
}
|
|
|
|
template PathSet readStorePaths(Source & from);
|
|
|
|
|
|
RemoteStore::RemoteStore()
|
|
{
|
|
initialised = false;
|
|
}
|
|
|
|
|
|
void RemoteStore::openConnection()
|
|
{
|
|
if (initialised) return;
|
|
initialised = true;
|
|
|
|
string remoteMode = getEnv("NIX_REMOTE");
|
|
|
|
if (remoteMode == "slave")
|
|
/* Fork off a setuid worker to do the privileged work. */
|
|
forkSlave();
|
|
else if (remoteMode == "daemon")
|
|
/* Connect to a daemon that does the privileged work for
|
|
us. */
|
|
connectToDaemon();
|
|
else
|
|
throw Error(format("invalid setting for NIX_REMOTE, `%1%'")
|
|
% remoteMode);
|
|
|
|
from.fd = fdSocket;
|
|
to.fd = fdSocket;
|
|
|
|
/* Send the magic greeting, check for the reply. */
|
|
try {
|
|
writeInt(WORKER_MAGIC_1, to);
|
|
to.flush();
|
|
unsigned int magic = readInt(from);
|
|
if (magic != WORKER_MAGIC_2) throw Error("protocol mismatch");
|
|
|
|
daemonVersion = readInt(from);
|
|
if (GET_PROTOCOL_MAJOR(daemonVersion) != GET_PROTOCOL_MAJOR(PROTOCOL_VERSION))
|
|
throw Error("Nix daemon protocol version not supported");
|
|
writeInt(PROTOCOL_VERSION, to);
|
|
processStderr();
|
|
}
|
|
catch (Error & e) {
|
|
throw Error(format("cannot start worker (%1%)")
|
|
% e.msg());
|
|
}
|
|
|
|
setOptions();
|
|
}
|
|
|
|
|
|
void RemoteStore::forkSlave()
|
|
{
|
|
int sockets[2];
|
|
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets) == -1)
|
|
throw SysError("cannot create sockets");
|
|
|
|
fdSocket = sockets[0];
|
|
AutoCloseFD fdChild = sockets[1];
|
|
|
|
/* Start the worker. */
|
|
Path worker = getEnv("NIX_WORKER");
|
|
if (worker == "")
|
|
worker = nixBinDir + "/nix-worker";
|
|
|
|
child = fork();
|
|
|
|
switch (child) {
|
|
|
|
case -1:
|
|
throw SysError("unable to fork");
|
|
|
|
case 0:
|
|
try { /* child */
|
|
|
|
if (dup2(fdChild, STDOUT_FILENO) == -1)
|
|
throw SysError("dupping write side");
|
|
|
|
if (dup2(fdChild, STDIN_FILENO) == -1)
|
|
throw SysError("dupping read side");
|
|
|
|
close(fdSocket);
|
|
close(fdChild);
|
|
|
|
execlp(worker.c_str(), worker.c_str(), "--slave", NULL);
|
|
|
|
throw SysError(format("executing `%1%'") % worker);
|
|
|
|
} catch (std::exception & e) {
|
|
std::cerr << format("child error: %1%\n") % e.what();
|
|
}
|
|
quickExit(1);
|
|
}
|
|
|
|
fdChild.close();
|
|
|
|
}
|
|
|
|
|
|
void RemoteStore::connectToDaemon()
|
|
{
|
|
fdSocket = socket(PF_UNIX, SOCK_STREAM, 0);
|
|
if (fdSocket == -1)
|
|
throw SysError("cannot create Unix domain socket");
|
|
|
|
string socketPath = nixStateDir + DEFAULT_SOCKET_PATH;
|
|
|
|
/* Urgh, sockaddr_un allows path names of only 108 characters. So
|
|
chdir to the socket directory so that we can pass a relative
|
|
path name. !!! this is probably a bad idea in multi-threaded
|
|
applications... */
|
|
AutoCloseFD fdPrevDir = open(".", O_RDONLY);
|
|
if (fdPrevDir == -1) throw SysError("couldn't open current directory");
|
|
chdir(dirOf(socketPath).c_str());
|
|
Path socketPathRel = "./" + baseNameOf(socketPath);
|
|
|
|
struct sockaddr_un addr;
|
|
addr.sun_family = AF_UNIX;
|
|
if (socketPathRel.size() >= sizeof(addr.sun_path))
|
|
throw Error(format("socket path `%1%' is too long") % socketPathRel);
|
|
using namespace std;
|
|
strcpy(addr.sun_path, socketPathRel.c_str());
|
|
|
|
if (connect(fdSocket, (struct sockaddr *) &addr, sizeof(addr)) == -1)
|
|
throw SysError(format("cannot connect to daemon at `%1%'") % socketPath);
|
|
|
|
if (fchdir(fdPrevDir) == -1)
|
|
throw SysError("couldn't change back to previous directory");
|
|
}
|
|
|
|
|
|
RemoteStore::~RemoteStore()
|
|
{
|
|
try {
|
|
to.flush();
|
|
fdSocket.close();
|
|
if (child != -1)
|
|
child.wait(true);
|
|
} catch (...) {
|
|
ignoreException();
|
|
}
|
|
}
|
|
|
|
|
|
void RemoteStore::setOptions()
|
|
{
|
|
writeInt(wopSetOptions, to);
|
|
writeInt(keepFailed, to);
|
|
writeInt(keepGoing, to);
|
|
writeInt(tryFallback, to);
|
|
writeInt(verbosity, to);
|
|
writeInt(maxBuildJobs, to);
|
|
writeInt(maxSilentTime, to);
|
|
if (GET_PROTOCOL_MINOR(daemonVersion) >= 2)
|
|
writeInt(useBuildHook, to);
|
|
if (GET_PROTOCOL_MINOR(daemonVersion) >= 4) {
|
|
writeInt(buildVerbosity, to);
|
|
writeInt(logType, to);
|
|
writeInt(printBuildTrace, to);
|
|
}
|
|
if (GET_PROTOCOL_MINOR(daemonVersion) >= 6)
|
|
writeInt(buildCores, to);
|
|
processStderr();
|
|
}
|
|
|
|
|
|
bool RemoteStore::isValidPath(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopIsValidPath, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
unsigned int reply = readInt(from);
|
|
return reply != 0;
|
|
}
|
|
|
|
|
|
PathSet RemoteStore::queryValidPaths()
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryValidPaths, to);
|
|
processStderr();
|
|
return readStorePaths<PathSet>(from);
|
|
}
|
|
|
|
|
|
bool RemoteStore::hasSubstitutes(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopHasSubstitutes, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
unsigned int reply = readInt(from);
|
|
return reply != 0;
|
|
}
|
|
|
|
|
|
bool RemoteStore::querySubstitutablePathInfo(const Path & path,
|
|
SubstitutablePathInfo & info)
|
|
{
|
|
openConnection();
|
|
if (GET_PROTOCOL_MINOR(daemonVersion) < 3) return false;
|
|
writeInt(wopQuerySubstitutablePathInfo, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
unsigned int reply = readInt(from);
|
|
if (reply == 0) return false;
|
|
info.deriver = readString(from);
|
|
if (info.deriver != "") assertStorePath(info.deriver);
|
|
info.references = readStorePaths<PathSet>(from);
|
|
info.downloadSize = readLongLong(from);
|
|
info.narSize = GET_PROTOCOL_MINOR(daemonVersion) >= 7 ? readLongLong(from) : 0;
|
|
return true;
|
|
}
|
|
|
|
|
|
ValidPathInfo RemoteStore::queryPathInfo(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryPathInfo, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
ValidPathInfo info;
|
|
info.path = path;
|
|
info.deriver = readString(from);
|
|
if (info.deriver != "") assertStorePath(info.deriver);
|
|
info.hash = parseHash(htSHA256, readString(from));
|
|
info.references = readStorePaths<PathSet>(from);
|
|
info.registrationTime = readInt(from);
|
|
info.narSize = readLongLong(from);
|
|
return info;
|
|
}
|
|
|
|
|
|
Hash RemoteStore::queryPathHash(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryPathHash, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
string hash = readString(from);
|
|
return parseHash(htSHA256, hash);
|
|
}
|
|
|
|
|
|
void RemoteStore::queryReferences(const Path & path,
|
|
PathSet & references)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryReferences, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
PathSet references2 = readStorePaths<PathSet>(from);
|
|
references.insert(references2.begin(), references2.end());
|
|
}
|
|
|
|
|
|
void RemoteStore::queryReferrers(const Path & path,
|
|
PathSet & referrers)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryReferrers, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
PathSet referrers2 = readStorePaths<PathSet>(from);
|
|
referrers.insert(referrers2.begin(), referrers2.end());
|
|
}
|
|
|
|
|
|
Path RemoteStore::queryDeriver(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryDeriver, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
Path drvPath = readString(from);
|
|
if (drvPath != "") assertStorePath(drvPath);
|
|
return drvPath;
|
|
}
|
|
|
|
|
|
PathSet RemoteStore::queryDerivationOutputs(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryDerivationOutputs, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
return readStorePaths<PathSet>(from);
|
|
}
|
|
|
|
|
|
PathSet RemoteStore::queryDerivationOutputNames(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryDerivationOutputNames, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
return readStrings<PathSet>(from);
|
|
}
|
|
|
|
|
|
Path RemoteStore::addToStore(const Path & _srcPath,
|
|
bool recursive, HashType hashAlgo, PathFilter & filter)
|
|
{
|
|
openConnection();
|
|
|
|
Path srcPath(absPath(_srcPath));
|
|
|
|
writeInt(wopAddToStore, to);
|
|
writeString(baseNameOf(srcPath), to);
|
|
/* backwards compatibility hack */
|
|
writeInt((hashAlgo == htSHA256 && recursive) ? 0 : 1, to);
|
|
writeInt(recursive ? 1 : 0, to);
|
|
writeString(printHashType(hashAlgo), to);
|
|
dumpPath(srcPath, to, filter);
|
|
processStderr();
|
|
return readStorePath(from);
|
|
}
|
|
|
|
|
|
Path RemoteStore::addTextToStore(const string & name, const string & s,
|
|
const PathSet & references)
|
|
{
|
|
openConnection();
|
|
writeInt(wopAddTextToStore, to);
|
|
writeString(name, to);
|
|
writeString(s, to);
|
|
writeStrings(references, to);
|
|
|
|
processStderr();
|
|
return readStorePath(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::exportPath(const Path & path, bool sign,
|
|
Sink & sink)
|
|
{
|
|
openConnection();
|
|
writeInt(wopExportPath, to);
|
|
writeString(path, to);
|
|
writeInt(sign ? 1 : 0, to);
|
|
processStderr(&sink); /* sink receives the actual data */
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
Paths RemoteStore::importPaths(bool requireSignature, Source & source)
|
|
{
|
|
openConnection();
|
|
writeInt(wopImportPaths, to);
|
|
/* We ignore requireSignature, since the worker forces it to true
|
|
anyway. */
|
|
processStderr(0, &source);
|
|
return readStorePaths<Paths>(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::buildDerivations(const PathSet & drvPaths)
|
|
{
|
|
openConnection();
|
|
writeInt(wopBuildDerivations, to);
|
|
writeStrings(drvPaths, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::ensurePath(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopEnsurePath, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::addTempRoot(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopAddTempRoot, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::addIndirectRoot(const Path & path)
|
|
{
|
|
openConnection();
|
|
writeInt(wopAddIndirectRoot, to);
|
|
writeString(path, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::syncWithGC()
|
|
{
|
|
openConnection();
|
|
writeInt(wopSyncWithGC, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
Roots RemoteStore::findRoots()
|
|
{
|
|
openConnection();
|
|
writeInt(wopFindRoots, to);
|
|
processStderr();
|
|
unsigned int count = readInt(from);
|
|
Roots result;
|
|
while (count--) {
|
|
Path link = readString(from);
|
|
Path target = readStorePath(from);
|
|
result[link] = target;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
void RemoteStore::collectGarbage(const GCOptions & options, GCResults & results)
|
|
{
|
|
openConnection();
|
|
|
|
writeInt(wopCollectGarbage, to);
|
|
writeInt(options.action, to);
|
|
writeStrings(options.pathsToDelete, to);
|
|
writeInt(options.ignoreLiveness, to);
|
|
writeLongLong(options.maxFreed, to);
|
|
writeInt(0, to);
|
|
if (GET_PROTOCOL_MINOR(daemonVersion) >= 5) {
|
|
/* removed options */
|
|
writeInt(0, to);
|
|
writeInt(0, to);
|
|
}
|
|
|
|
processStderr();
|
|
|
|
results.paths = readStrings<PathSet>(from);
|
|
results.bytesFreed = readLongLong(from);
|
|
results.blocksFreed = readLongLong(from);
|
|
}
|
|
|
|
|
|
PathSet RemoteStore::queryFailedPaths()
|
|
{
|
|
openConnection();
|
|
writeInt(wopQueryFailedPaths, to);
|
|
processStderr();
|
|
return readStorePaths<PathSet>(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::clearFailedPaths(const PathSet & paths)
|
|
{
|
|
openConnection();
|
|
writeInt(wopClearFailedPaths, to);
|
|
writeStrings(paths, to);
|
|
processStderr();
|
|
readInt(from);
|
|
}
|
|
|
|
|
|
void RemoteStore::processStderr(Sink * sink, Source * source)
|
|
{
|
|
to.flush();
|
|
unsigned int msg;
|
|
while ((msg = readInt(from)) == STDERR_NEXT
|
|
|| msg == STDERR_READ || msg == STDERR_WRITE) {
|
|
if (msg == STDERR_WRITE) {
|
|
string s = readString(from);
|
|
if (!sink) throw Error("no sink");
|
|
(*sink)((const unsigned char *) s.data(), s.size());
|
|
}
|
|
else if (msg == STDERR_READ) {
|
|
if (!source) throw Error("no source");
|
|
size_t len = readInt(from);
|
|
unsigned char * buf = new unsigned char[len];
|
|
AutoDeleteArray<unsigned char> d(buf);
|
|
writeString(buf, source->read(buf, len), to);
|
|
to.flush();
|
|
}
|
|
else {
|
|
string s = readString(from);
|
|
writeToStderr((const unsigned char *) s.data(), s.size());
|
|
}
|
|
}
|
|
if (msg == STDERR_ERROR) {
|
|
string error = readString(from);
|
|
unsigned int status = GET_PROTOCOL_MINOR(daemonVersion) >= 8 ? readInt(from) : 1;
|
|
throw Error(format("%1%") % error, status);
|
|
}
|
|
else if (msg != STDERR_LAST)
|
|
throw Error("protocol error processing standard error");
|
|
}
|
|
|
|
|
|
}
|