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2020-04-20Merge release-20200323.0-187-gdb2a60b (automated)gVisor bot
2020-04-19Don't accept segments outside the receive windowEyal Soha
Fixed to match RFC 793 page 69. Fixes #1607 PiperOrigin-RevId: 307334892
2020-04-17Merge release-20200323.0-174-gb4de018 (automated)gVisor bot
2020-04-17Permit setting unknown optionsTamir Duberstein
This previously changed in 305699233, but this behaviour turned out to be load bearing. PiperOrigin-RevId: 307033802
2020-04-17Merge release-20200323.0-170-g3b05f57 (automated)gVisor bot
2020-04-16Reset pending connections on listener shutdown.Mithun Iyer
When the listening socket is read shutdown, we need to reset all pending and incoming connections. Ensure that the endpoint is not cleaned up from the demuxer and subsequent bind to same port does not go through. PiperOrigin-RevId: 306958038
2020-04-16Merge release-20200323.0-168-g0eda010 (automated)gVisor bot
2020-04-16Fix data race in tcp_test.Bhasker Hariharan
This change makes SynRcvdCountThreshold and the global synRcvdCount into a stack configurable value. This is required because in cases like mod_proxy which create multiple Stack instances the count will be a global value that impacts all Stack instances. Further the tests relied on modifying the global threshold to simulate tests where we want to verify SYN cookie based behaviour. This lead to data races due to the global being modified/read without locks or atomics. PiperOrigin-RevId: 306947723
2020-04-15Merge release-20200323.0-158-g0348edc (automated)gVisor bot
2020-04-15Remove unnecessary codeTamir Duberstein
Remove useless casts and duplicate return statements. PiperOrigin-RevId: 306627916
2020-04-15Merge release-20200323.0-157-g9c91834 (automated)gVisor bot
2020-04-15Reset pending connections on listener closeMithun Iyer
Attempt to redeliver TCP segments that are enqueued into a closing TCP endpoint. This was being done for Established endpoints but not for those that are listening or performing connection handshake. Fixes #2417 PiperOrigin-RevId: 306598155
2020-04-15Merge release-20200323.0-156-g28212b3 (automated)gVisor bot
2020-04-14Reduce flakiness in tcp_test.Bhasker Hariharan
Tests now use a MinRTO of 3s instead of default 200ms. This reduced flakiness in a lot of the congestion control/recovery tests which were flaky due to retransmit timer firing too early in case the test executors were overloaded. This change also bumps some of the timeouts in tests which were too sensitive to timer variations and reduces the number of slow start iterations which can make the tests run for too long and also trigger retansmit timeouts etc if the executor is overloaded. PiperOrigin-RevId: 306562645
2020-04-09Merge pull request #2253 from amscanne:nogogVisor bot
PiperOrigin-RevId: 305807868
2020-04-09Merge release-20200323.0-103-g7928aa3 (automated)gVisor bot
2020-04-09Convert int and bool socket options to use GetSockOptInt and GetSockOptBoolAndrei Vagin
PiperOrigin-RevId: 305699233
2020-04-08Remove lostcancel warnings.Adin Scannell
Updates #2243
2020-04-08Fix all printf formatting errors.Adin Scannell
Updates #2243
2020-04-04Merge release-20200323.0-69-gfc99a7e (automated)gVisor bot
2020-04-03Refactor software GSO code.Bhasker Hariharan
Software GSO implementation currently has a complicated code path with implicit assumptions that all packets to WritePackets carry same Data and it does this to avoid allocations on the path etc. But this makes it hard to reuse the WritePackets API. This change breaks all such assumptions by introducing a new Vectorised View API ReadToVV which can be used to cleanly split a VV into multiple independent VVs. Further this change also makes packet buffers linkable to form an intrusive list. This allows us to get rid of the array of packet buffers that are passed in the WritePackets API call and replace it with a list of packet buffers. While this code does introduce some more allocations in the benchmarks it doesn't cause any degradation. Updates #231 PiperOrigin-RevId: 304731742
2020-03-26Merge release-20200219.0-249-g0e62a54 (automated)gVisor bot
2020-03-26Support owner matching for iptables.Nayana Bidari
This feature will match UID and GID of the packet creator, for locally generated packets. This match is only valid in the OUTPUT and POSTROUTING chains. Forwarded packets do not have any socket associated with them. Packets from kernel threads do have a socket, but usually no owner.
2020-03-25Merge release-20200219.0-224-gd04adeb (automated)gVisor bot
2020-03-25Fix data-race in endpoint.ReadinessBhasker Hariharan
PiperOrigin-RevId: 302924789
2020-03-24Merge release-20200219.0-222-gc8eeedc (automated)gVisor bot
2020-03-24Add support for setting TCP segment hash.Bhasker Hariharan
This allows the link layer endpoints to consistenly hash a TCP segment to a single underlying queue in case a link layer endpoint does support multiple underlying queues. Updates #231 PiperOrigin-RevId: 302760664
2020-03-24Merge release-20200219.0-220-g7e4073a (automated)gVisor bot
2020-03-24Move tcpip.PacketBuffer and IPTables to stack package.Bhasker Hariharan
This is a precursor to be being able to build an intrusive list of PacketBuffers for use in queuing disciplines being implemented. Updates #2214 PiperOrigin-RevId: 302677662
2020-03-20Merge release-20200219.0-212-g49aef9c (automated)gVisor bot
2020-03-20Remove unused variable `sndNxtList`.Ting-Yu Wang
PiperOrigin-RevId: 302110328
2020-03-19Remove redundant dep in BUILDJay Zhuang
PiperOrigin-RevId: 301859066
2020-03-19Merge release-20200219.0-203-gfd27a91 (automated)gVisor bot
2020-03-19Address comments on workMu removal change.Bhasker Hariharan
Updates #231, #357 PiperOrigin-RevId: 301833669
2020-03-19Merge release-20200219.0-202-ge9e399c (automated)gVisor bot
2020-03-19Remove workMu from tcpip.Endpoint.Bhasker Hariharan
workMu is removed and e.mu is now a mutex that supports TryLock. The packet processing path tries to lock the mutex and if its locked it will just queue the packet and move on. The endpoint.UnlockUser() will process any backlog of packets before unlocking the socket. This simplifies the locking inside tcp endpoints a lot. Further the endpoint.LockUser() implements spinning as long as the lock is not held by another syscall goroutine. This ensures low latency as not spinning leads to the task thread being put to sleep if the lock is held by the packet dispatch path. This is suboptimal as the lower layer rarely holds the lock for long so implementing spinning here helps. If the lock is held by another task goroutine then we just proceed to call LockUser() and the task could be put to sleep. The protocol goroutines themselves just call e.mu.Lock() and block if the lock is currently not available. Updates #231, #357 PiperOrigin-RevId: 301808349
2020-03-18Merge release-20200219.0-195-g92a00ca (automated)gVisor bot
2020-03-18Store segment transmit count.Ian Gudger
This will aid in segment reordering detection. Updates #691 PiperOrigin-RevId: 301692638
2020-03-12Merge release-20200219.0-155-gac05043 (automated)gVisor bot
2020-03-11Implement heap.Interface on pointer receiverTamir Duberstein
PiperOrigin-RevId: 300467253
2020-03-12Merge release-20200219.0-154-g538e35f (automated)gVisor bot
2020-03-11Fix race condition (*tcp.endpoint).CloseTamir Duberstein
Atomically close the endpoint. Before this change, it was possible for multiple callers to perform duplicate work. PiperOrigin-RevId: 300462110
2020-03-12Merge release-20200219.0-150-g81675b8 (automated)gVisor bot
2020-03-11Fix memory leak in danglingEndpoints.Bhasker Hariharan
Endpoints which were being terminated in an ERROR state or were moved to CLOSED by the worker goroutine do not run cleanupLocked() as that should already be run by the worker termination. But when making that change we made the mistake of not removing the endpoint from the danglingEndpoints which is normally done in cleanupLocked(). As a result these endpoints are leaked since a reference is held to them in the danglingEndpoints array forever till Stack is torn down. PiperOrigin-RevId: 300438426
2020-03-06Merge release-20200219.0-122-g6fa5cee (automated)gVisor bot
2020-03-06Merge release-20200219.0-117-gd5dbe36 (automated)gVisor bot
2020-03-06shutdown(s, SHUT_WR) in TIME-WAIT returns ENOTCONNEyal Soha
From RFC 793 s3.9 p61 Event Processing: CLOSE Call during TIME-WAIT: return with "error: connection closing" Fixes #1603 PiperOrigin-RevId: 299401353
2020-03-05Merge release-20200219.0-107-g9b3aad3 (automated)gVisor bot
2020-03-05Use a pool of arrays to avoid slice headers from escaping in TCP options pool.Ian Gudger
By putting slices into the pool, the slice header escapes. This can be avoided by not putting the slice header into the pool. This removes an allocation from the TCP segment send path. PiperOrigin-RevId: 299215480
2020-03-03Merge release-20200219.0-93-g371abe0 (automated)gVisor bot