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Commit | Line | Data |
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870a0fe4 AT |
1 | #ifdef HAVE_CONFIG_H |
2 | #include "config.h" | |
3 | #endif | |
8e9b7d99 | 4 | #include "signingpipe.hh" |
a6ef6f7a BH |
5 | #include "misc.hh" |
6 | #include <poll.h> | |
fa8fd4d2 | 7 | |
a6ef6f7a BH |
8 | #include <sys/socket.h> |
9 | #include <netinet/in.h> | |
10 | #include <netinet/tcp.h> | |
11 | #include <sched.h> | |
8e9b7d99 | 12 | |
8d59e8ce BH |
13 | // deal with partial reads |
14 | namespace { | |
15 | int readn(int fd, void* buffer, unsigned int len) | |
16 | { | |
17 | unsigned int pos=0; | |
18 | int res; | |
19 | for(;;) { | |
20 | res = read(fd, (char*)buffer + pos, len - pos); | |
21 | if(res == 0) { | |
22 | if(pos) | |
23 | throw runtime_error("Signing Pipe remote shut down in the middle of a message"); | |
24 | else { | |
7b217f2e | 25 | //cerr<<"Got decent EOF on "<<fd<<endl; |
8d59e8ce BH |
26 | return 0; |
27 | } | |
28 | } | |
29 | ||
30 | if(res < 0) { | |
31 | if(errno == EAGAIN || errno == EINTR) { | |
32 | if(pos==0) | |
33 | return -1; | |
34 | waitForData(fd, -1); | |
35 | continue; | |
36 | } | |
37 | unixDie("Reading from socket in Signing Pipe loop"); | |
38 | } | |
39 | ||
40 | pos+=res; | |
41 | if(pos == len) | |
42 | break; | |
43 | } | |
44 | return len; | |
45 | } | |
46 | } | |
47 | ||
07019b51 RG |
48 | void* ChunkedSigningPipe::helperWorker(ChunkedSigningPipe* csp, int fd) |
49 | try { | |
50 | csp->worker(fd); | |
51 | return nullptr; | |
8267bd2c | 52 | } |
97f1f8d9 | 53 | catch(...) { |
e6a9dde5 | 54 | g_log<<Logger::Error<<"Unknown exception in signing thread occurred"<<endl; |
07019b51 | 55 | return nullptr; |
bec14a20 | 56 | } |
8267bd2c | 57 | |
e3200e07 | 58 | ChunkedSigningPipe::ChunkedSigningPipe(const DNSName& signerName, bool mustSign, unsigned int workers) |
c3064e57 | 59 | : d_signed(0), d_queued(0), d_outstanding(0), d_numworkers(workers), d_submitted(0), d_signer(signerName), |
07019b51 | 60 | d_maxchunkrecords(100), d_threads(d_numworkers), d_mustSign(mustSign), d_final(false) |
8267bd2c | 61 | { |
a2aaa807 | 62 | d_rrsetToSign = new rrset_t; |
90ba52e0 | 63 | d_chunks.push_back(vector<DNSZoneRecord>()); // load an empty chunk |
8d59e8ce | 64 | |
8267bd2c BH |
65 | if(!d_mustSign) |
66 | return; | |
a2aaa807 | 67 | |
a2aaa807 BH |
68 | int fds[2]; |
69 | ||
8267bd2c | 70 | for(unsigned int n=0; n < d_numworkers; ++n) { |
8d59e8ce BH |
71 | if(socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) |
72 | throw runtime_error("Unable to create communication socket in for ChunkedSigningPipe"); | |
3897b9e1 | 73 | setCloseOnExec(fds[0]); |
74 | setCloseOnExec(fds[1]); | |
07019b51 | 75 | d_threads[n] = std::thread(helperWorker, this, fds[1]); |
3897b9e1 | 76 | setNonBlocking(fds[0]); |
8d59e8ce | 77 | d_sockets.push_back(fds[0]); |
e3200e07 | 78 | d_outstandings[fds[0]] = 0; |
8267bd2c BH |
79 | } |
80 | } | |
81 | ||
82 | ChunkedSigningPipe::~ChunkedSigningPipe() | |
83 | { | |
a2aaa807 | 84 | delete d_rrsetToSign; |
07019b51 | 85 | |
8267bd2c BH |
86 | if(!d_mustSign) |
87 | return; | |
07019b51 | 88 | |
ef7cd021 | 89 | for(int fd : d_sockets) { |
a6ef6f7a BH |
90 | close(fd); // this will trigger all threads to exit |
91 | } | |
07019b51 RG |
92 | |
93 | for(auto& thread : d_threads) { | |
94 | thread.join(); | |
a6ef6f7a | 95 | } |
7b217f2e | 96 | //cout<<"Did: "<<d_signed<<", records (!= chunks) submitted: "<<d_submitted<<endl; |
8267bd2c BH |
97 | } |
98 | ||
a2f3b9ec | 99 | namespace { |
b9bafae0 | 100 | bool |
90ba52e0 | 101 | dedupLessThan(const DNSZoneRecord& a, const DNSZoneRecord &b) |
a2f3b9ec | 102 | { |
90ba52e0 | 103 | return make_tuple(a.dr.d_content->getZoneRepresentation(), a.dr.d_ttl) < make_tuple(b.dr.d_content->getZoneRepresentation(), b.dr.d_ttl); // XXX SLOW SLOW SLOW |
a2f3b9ec BH |
104 | } |
105 | ||
90ba52e0 | 106 | bool dedupEqual(const DNSZoneRecord& a, const DNSZoneRecord &b) |
a2f3b9ec | 107 | { |
90ba52e0 | 108 | return make_tuple(a.dr.d_content->getZoneRepresentation(), a.dr.d_ttl) == make_tuple(b.dr.d_content->getZoneRepresentation(), b.dr.d_ttl); // XXX SLOW SLOW SLOW |
a2f3b9ec BH |
109 | } |
110 | } | |
111 | ||
112 | void ChunkedSigningPipe::dedupRRSet() | |
113 | { | |
114 | // our set contains contains records for one type and one name, but might not be sorted otherwise | |
115 | sort(d_rrsetToSign->begin(), d_rrsetToSign->end(), dedupLessThan); | |
116 | d_rrsetToSign->erase(unique(d_rrsetToSign->begin(), d_rrsetToSign->end(), dedupEqual), d_rrsetToSign->end()); | |
117 | } | |
118 | ||
90ba52e0 | 119 | bool ChunkedSigningPipe::submit(const DNSZoneRecord& rr) |
8e9b7d99 | 120 | { |
8d59e8ce BH |
121 | ++d_submitted; |
122 | // check if we have a full RRSET to sign | |
90ba52e0 | 123 | if(!d_rrsetToSign->empty() && (d_rrsetToSign->begin()->dr.d_type != rr.dr.d_type || d_rrsetToSign->begin()->dr.d_name != rr.dr.d_name)) |
8e9b7d99 | 124 | { |
a2f3b9ec | 125 | dedupRRSet(); |
a2aaa807 | 126 | sendRRSetToWorker(); |
8e9b7d99 | 127 | } |
a2aaa807 | 128 | d_rrsetToSign->push_back(rr); |
a2f3b9ec | 129 | return !d_chunks.empty() && d_chunks.front().size() >= d_maxchunkrecords; // "you can send more" |
8e9b7d99 BH |
130 | } |
131 | ||
a6ef6f7a BH |
132 | pair<vector<int>, vector<int> > ChunkedSigningPipe::waitForRW(bool rd, bool wr, int seconds) |
133 | { | |
ac10b8c6 | 134 | vector<pollfd> pfds; |
e3200e07 | 135 | |
8d59e8ce | 136 | for(unsigned int n = 0; n < d_sockets.size(); ++n) { |
a4da80fc | 137 | if(d_eof.count(d_sockets[n])) |
ac10b8c6 BH |
138 | continue; |
139 | struct pollfd pfd; | |
140 | memset(&pfd, 0, sizeof(pfd)); | |
141 | pfd.fd = d_sockets[n]; | |
142 | if(rd) | |
143 | pfd.events |= POLLIN; | |
144 | if(wr) | |
145 | pfd.events |= POLLOUT; | |
146 | pfds.push_back(pfd); | |
a6ef6f7a | 147 | } |
e3200e07 | 148 | |
a135720d | 149 | int res = poll(&pfds[0], pfds.size(), (seconds < 0) ? -1 : (seconds * 1000)); // -1 = infinite |
a6ef6f7a | 150 | if(res < 0) |
335da0ba | 151 | unixDie("polling for activity from signers, "+std::to_string(d_sockets.size())); |
a6ef6f7a | 152 | pair<vector<int>, vector<int> > vects; |
ac10b8c6 | 153 | for(unsigned int n = 0; n < pfds.size(); ++n) |
a6ef6f7a BH |
154 | if(pfds[n].revents & POLLIN) |
155 | vects.first.push_back(pfds[n].fd); | |
156 | else if(pfds[n].revents & POLLOUT) | |
157 | vects.second.push_back(pfds[n].fd); | |
158 | ||
159 | return vects; | |
160 | } | |
161 | ||
8d59e8ce BH |
162 | void ChunkedSigningPipe::addSignedToChunks(chunk_t* signedChunk) |
163 | { | |
164 | chunk_t::const_iterator from = signedChunk->begin(); | |
165 | ||
166 | while(from != signedChunk->end()) { | |
167 | chunk_t& fillChunk = d_chunks.back(); | |
168 | ||
169 | chunk_t::size_type room = d_maxchunkrecords - fillChunk.size(); | |
170 | ||
171 | unsigned int fit = std::min(room, (chunk_t::size_type)(signedChunk->end() - from)); | |
172 | ||
173 | d_chunks.back().insert(fillChunk.end(), from , from + fit); | |
174 | from+=fit; | |
175 | ||
176 | if(from != signedChunk->end()) // it didn't fit, so add a new chunk | |
177 | d_chunks.push_back(chunk_t()); | |
178 | } | |
179 | } | |
a6ef6f7a | 180 | |
a2aaa807 | 181 | void ChunkedSigningPipe::sendRRSetToWorker() // it sounds so socialist! |
8267bd2c BH |
182 | { |
183 | if(!d_mustSign) { | |
8d59e8ce | 184 | addSignedToChunks(d_rrsetToSign); |
a2aaa807 | 185 | d_rrsetToSign->clear(); |
8267bd2c BH |
186 | return; |
187 | } | |
a2aaa807 | 188 | |
8d59e8ce BH |
189 | if(d_final && !d_outstanding) // nothing to do! |
190 | return; | |
191 | ||
a6ef6f7a BH |
192 | bool wantRead, wantWrite; |
193 | ||
194 | wantWrite = !d_rrsetToSign->empty(); | |
8d59e8ce | 195 | wantRead = d_outstanding || wantWrite; // if we wrote, we want to read |
a6ef6f7a BH |
196 | |
197 | pair<vector<int>, vector<int> > rwVect; | |
198 | ||
e3200e07 | 199 | rwVect = waitForRW(wantRead, wantWrite, -1); // wait for something to happen |
a6ef6f7a BH |
200 | |
201 | if(wantWrite && !rwVect.second.empty()) { | |
8d59e8ce | 202 | random_shuffle(rwVect.second.begin(), rwVect.second.end()); // pick random available worker |
a6ef6f7a | 203 | writen2(*rwVect.second.begin(), &d_rrsetToSign, sizeof(d_rrsetToSign)); |
a2aaa807 | 204 | d_rrsetToSign = new rrset_t; |
e3200e07 | 205 | d_outstandings[*rwVect.second.begin()]++; |
8267bd2c | 206 | d_outstanding++; |
a2aaa807 | 207 | d_queued++; |
8d59e8ce BH |
208 | wantWrite=false; |
209 | } | |
210 | ||
211 | if(wantRead) { | |
212 | while(d_outstanding) { | |
213 | chunk_t* chunk; | |
a6ef6f7a | 214 | |
ef7cd021 | 215 | for(int fd : rwVect.first) { |
8d59e8ce BH |
216 | if(d_eof.count(fd)) |
217 | continue; | |
218 | ||
219 | while(d_outstanding) { | |
220 | int res = readn(fd, &chunk, sizeof(chunk)); | |
221 | if(!res) { | |
e3200e07 RG |
222 | if (d_outstandings[fd] > 0) { |
223 | throw std::runtime_error("A signing pipe worker died while we were waiting for its result"); | |
224 | } | |
8d59e8ce BH |
225 | d_eof.insert(fd); |
226 | break; | |
227 | } | |
228 | if(res < 0) { | |
229 | if(errno != EAGAIN && errno != EINTR) | |
230 | unixDie("Error reading signed chunk from thread"); | |
231 | else | |
232 | break; | |
233 | } | |
234 | ||
235 | --d_outstanding; | |
e3200e07 | 236 | d_outstandings[fd]--; |
8d59e8ce BH |
237 | |
238 | addSignedToChunks(chunk); | |
239 | ||
240 | delete chunk; | |
241 | } | |
242 | } | |
243 | if(!d_outstanding || !d_final) | |
a6ef6f7a | 244 | break; |
e3200e07 | 245 | rwVect = waitForRW(true, false, -1); // wait for something to happen |
a6ef6f7a | 246 | } |
8267bd2c | 247 | } |
a6ef6f7a | 248 | |
8d59e8ce | 249 | if(wantWrite) { // our optimization above failed, we now wait synchronously |
e3200e07 | 250 | rwVect = waitForRW(false, wantWrite, -1); // wait for something to happen |
8d59e8ce BH |
251 | random_shuffle(rwVect.second.begin(), rwVect.second.end()); // pick random available worker |
252 | writen2(*rwVect.second.begin(), &d_rrsetToSign, sizeof(d_rrsetToSign)); | |
253 | d_rrsetToSign = new rrset_t; | |
e3200e07 | 254 | d_outstandings[*rwVect.second.begin()]++; |
8d59e8ce BH |
255 | d_outstanding++; |
256 | d_queued++; | |
a6ef6f7a BH |
257 | } |
258 | ||
8267bd2c BH |
259 | } |
260 | ||
e3200e07 | 261 | unsigned int ChunkedSigningPipe::getReady() const |
a2aaa807 BH |
262 | { |
263 | unsigned int sum=0; | |
90ba52e0 | 264 | for(const auto& v : d_chunks) { |
a2aaa807 BH |
265 | sum += v.size(); |
266 | } | |
267 | return sum; | |
268 | } | |
07019b51 RG |
269 | |
270 | void ChunkedSigningPipe::worker(int fd) | |
a6ef6f7a | 271 | try |
8267bd2c | 272 | { |
a6ef6f7a | 273 | UeberBackend db("key-only"); |
ea99d474 | 274 | DNSSECKeeper dk(&db); |
a6ef6f7a | 275 | |
c23d888d | 276 | chunk_t* chunk = nullptr; |
8267bd2c BH |
277 | int res; |
278 | for(;;) { | |
a6ef6f7a BH |
279 | res = readn(fd, &chunk, sizeof(chunk)); |
280 | if(!res) | |
8267bd2c | 281 | break; |
a6ef6f7a BH |
282 | if(res < 0) |
283 | unixDie("reading object pointer to sign from pdns"); | |
c23d888d RG |
284 | try { |
285 | set<DNSName> authSet; | |
286 | authSet.insert(d_signer); | |
287 | addRRSigs(dk, db, authSet, *chunk); | |
288 | ++d_signed; | |
289 | ||
290 | writen2(fd, &chunk, sizeof(chunk)); | |
291 | chunk = nullptr; | |
292 | } | |
293 | catch(const PDNSException& pe) { | |
294 | delete chunk; | |
295 | throw; | |
296 | } | |
297 | catch(const std::exception& e) { | |
298 | delete chunk; | |
299 | throw; | |
300 | } | |
8267bd2c | 301 | } |
a6ef6f7a BH |
302 | close(fd); |
303 | } | |
c23d888d | 304 | catch(const PDNSException& pe) |
97f1f8d9 | 305 | { |
e6a9dde5 | 306 | g_log<<Logger::Error<<"Signing thread died because of PDNSException: "<<pe.reason<<endl; |
97f1f8d9 KM |
307 | close(fd); |
308 | } | |
c23d888d | 309 | catch(const std::exception& e) |
a6ef6f7a | 310 | { |
e6a9dde5 | 311 | g_log<<Logger::Error<<"Signing thread died because of std::exception: "<<e.what()<<endl; |
a6ef6f7a | 312 | close(fd); |
8267bd2c BH |
313 | } |
314 | ||
8e9b7d99 BH |
315 | void ChunkedSigningPipe::flushToSign() |
316 | { | |
a2aaa807 BH |
317 | sendRRSetToWorker(); |
318 | d_rrsetToSign->clear(); | |
8e9b7d99 BH |
319 | } |
320 | ||
90ba52e0 | 321 | vector<DNSZoneRecord> ChunkedSigningPipe::getChunk(bool final) |
8e9b7d99 | 322 | { |
a6ef6f7a BH |
323 | if(final && !d_final) { |
324 | // this means we should keep on reading until d_outstanding == 0 | |
325 | d_final = true; | |
8e9b7d99 | 326 | flushToSign(); |
a6ef6f7a | 327 | |
ef7cd021 | 328 | for(int fd : d_sockets) { |
a6ef6f7a | 329 | shutdown(fd, SHUT_WR); // perhaps this transmits EOF the other side |
7b217f2e | 330 | //cerr<<"shutdown of "<<fd<<endl; |
a6ef6f7a | 331 | } |
8267bd2c | 332 | } |
a6ef6f7a BH |
333 | if(d_final) |
334 | flushToSign(); // should help us wait | |
90ba52e0 | 335 | vector<DNSZoneRecord> front=d_chunks.front(); |
a2aaa807 BH |
336 | d_chunks.pop_front(); |
337 | if(d_chunks.empty()) | |
90ba52e0 | 338 | d_chunks.push_back(vector<DNSZoneRecord>()); |
e125fc69 | 339 | /* if(d_final && front.empty()) |
340 | cerr<<"getChunk returning empty in final"<<endl; */ | |
a2aaa807 | 341 | return front; |
8e9b7d99 | 342 | } |
8d59e8ce | 343 | |
8d59e8ce | 344 |