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2021-02-02Add support for rate limiting out of window ACKs.Bhasker Hariharan
Netstack today will send dupACK's with no rate limit for incoming out of window segments. This can result in ACK loops for example if a TCP socket connects to itself (actually permitted by TCP). Where the ACK sent in response to packets being out of order itself gets considered as an out of window segment resulting in another ACK being generated. PiperOrigin-RevId: 355206877
2021-02-02Assert TCP_INFO size before checking contentTamir Duberstein
Also sync syscall test expectations on Fuchisa. PiperOrigin-RevId: 355163492
2021-02-01Add RACK reorder tests.Nayana Bidari
PiperOrigin-RevId: 355067082
2021-02-01[infra] Consolidate all ubuntu tests into one image.Ayush Ranjan
This makes it easier to add more tests that run on Ubuntu. We can now just add a bash script and call that from integration_test without having to set up another image. PiperOrigin-RevId: 355000410
2021-02-01Assert expected size before unmarshallingTamir Duberstein
...to prevent panicking in case of failure. PiperOrigin-RevId: 354970257
2021-01-30Remove side effect from open testsFabricio Voznika
Individual test cases must not rely on being executed in a clean environment. PiperOrigin-RevId: 354730126
2021-01-29setgid directory syscall testsKevin Krakauer
PiperOrigin-RevId: 354615220
2021-01-29Remove side effect from test casesFabricio Voznika
Individual test cases must not rely on being executed in a clean environment. PiperOrigin-RevId: 354604389
2021-01-29- Add more comments for the TCP_INFO struct fields.Nayana Bidari
PiperOrigin-RevId: 354595623
2021-01-28Change EXPECT/ASSERT to TEST_CHECK inside InForkedProcessFabricio Voznika
PiperOrigin-RevId: 354441239
2021-01-28Re-enable ipv4 reassembly packetimpact testsArthur Sfez
When these specific tests were first added, they would fail when ran by kokoro during the presubmit tests (but they always passed locally). These tests are now passing, so they can be re-enabled. Unclear what changed, one hypothesis is the move from kokoro to buildkite. Fixes #4971 PiperOrigin-RevId: 354425395
2021-01-28Make tcp_noaccept_close_rst more robustZeling Feng
There used to be a race condition where we may call Close before the connection is established. Adding poll support so that we can eliminate this kind of race. Startblock: has LGTM from iyerm and then add reviewer tamird PiperOrigin-RevId: 354369130
2021-01-28Add O_PATH support in vfs2gVisor bot
PiperOrigin-RevId: 354367665
2021-01-28Correctly check permissions in ping socket testTamir Duberstein
The previous check was using SOCK_RAW, despite the fact that the test only uses SOCK_DGRAM. Simplify the test machinery while I'm here. PiperOrigin-RevId: 354359842
2021-01-28Respect SO_BINDTODEVICE in unconnected UDP writesMarina Ciocea
Previously, sending on an unconnected UDP socket would ignore the SO_BINDTODEVICE option. Send on the configured interface when an UDP socket is bound to an interface through setsockop SO_BINDTODEVICE. Add packetimpact tests exercising UDP reads and writes with every combination of bound/unbound, broadcast/multicast/unicast destination, and bound/not-bound to device. PiperOrigin-RevId: 354299670
2021-01-27Add support for more fields in netstack for TCP_INFONayana Bidari
This CL adds support for the following fields: - RTT, RTTVar, RTO - send congestion window (sndCwnd) and send slow start threshold (sndSsthresh) - congestion control state(CaState) - ReorderSeen PiperOrigin-RevId: 354195361
2021-01-27Deflake tcp_zero_window_probe_retransmit_testMithun Iyer
Fix the test to rely on more deterministic retransmission interval computations by skipping the initial probe transmission time as that can be non-deterministic given arbitrary time taken for the DUT to receive a send command and initiate a send. Fixes #5080 PiperOrigin-RevId: 354146256
2021-01-26Initialize timestamps for gofer synthetic children.Dean Deng
Contrary to the comment on the socket test, the failure was due to an issue with goferfs rather than kernfs. PiperOrigin-RevId: 353918021
2021-01-26Move inotify events from syscall to vfs layer.Dean Deng
This also causes inotify events to be generated when reading files for exec. This change also requires us to adjust splice+inotify tests due to discrepancies between gVisor and Linux behavior. Note that these discrepancies existed before; we just did not exercise them previously. See comment for more details. Fixes #5348. PiperOrigin-RevId: 353907187
2021-01-26Do not send SCM Rights more than once when message is truncated.Dean Deng
If data is sent over a stream socket that will not fit all at once, it will be sent over multiple packets. SCM Rights should only be sent with the first packet (see net/unix/af_unix.c:unix_stream_sendmsg in Linux). Reported-by: syzbot+aa26482e9c4887aff259@syzkaller.appspotmail.com PiperOrigin-RevId: 353886442
2021-01-26Move SO_SNDBUF to socketops.Nayana Bidari
This CL moves {S,G}etsockopt of SO_SNDBUF from all endpoints to socketops. For unix sockets, we do not support setting of this option. PiperOrigin-RevId: 353871484
2021-01-26Do not generate extraneous IN_CLOSE inotify events.Dean Deng
IN_CLOSE should only be generated when a file description loses its last reference; not when a file descriptor is closed. See fs/file_table.c:__fput. Updates #5348. PiperOrigin-RevId: 353810697
2021-01-25Remove side effect from shm testsFabricio Voznika
Individual test cases must not rely on being executed in a clean environment. PiperOrigin-RevId: 353684155
2021-01-25Fix Inotify.Exec testFabricio Voznika
The test was execve itself into `/bin/true`, so the test was not actually executing. PiperOrigin-RevId: 353676855
2021-01-22Detect failures in forked functionFabricio Voznika
EXPECT*/ASSERT* functions are not async-signal-safe and should not be called from the function passed to InForkedProcess. However, these happen accidentally sometimes but do no cause InForkedProcess to fail. Detect and notify in such cases. PiperOrigin-RevId: 353354540
2021-01-22Implement F_GETLK fcntl.Dean Deng
Fixes #5113. PiperOrigin-RevId: 353313374
2021-01-22Add tests for RACKNayana Bidari
- Added packetimpact tests for RACK. PiperOrigin-RevId: 353282342
2021-01-21iptables: support matching the input interface nameToshi Kikuchi
We have support for the output interface name, but not for the input interface name. This change adds the support for the input interface name, and adds the test cases for it. Fixes #5300 PiperOrigin-RevId: 353179389
2021-01-21Fix fsstress argument nameFabricio Voznika
Updates #5273 PiperOrigin-RevId: 353087710
2021-01-21Syscall test for connecting to unspecified addressZeling Feng
For an active OPEN call with unspecified foreign socket, TCP MUST return error: foreign socket unspecified PiperOrigin-RevId: 352961691
2021-01-20Fix typo boundry -> boundary.Dean Deng
PiperOrigin-RevId: 352905565
2021-01-19platform/ptrace: workaround a kernel ptrace issue on ARM64Andrei Vagin
On ARM64, when ptrace stops on a system call, it uses the x7 register to indicate whether the stop has been signalled from syscall entry or syscall exit. This means that we can't get a value of this register and we can't change it. More details are in the comment for tracehook_report_syscall in arch/arm64/kernel/ptrace.c. This happens only if we stop on a system call, so let's queue a signal, resume a stub thread and catch it on a signal handling. Fixes: #5238 PiperOrigin-RevId: 352668695
2021-01-19Ensure that IP{V6}_RECVORIGDSTADDR yields the post-NAT address and port.Kevin Krakauer
PiperOrigin-RevId: 352624174
2021-01-15Correctly return EMSGSIZE when packet is too big in raw socket.Ting-Yu Wang
IPv4 previously accepts the packet, while IPv6 panics. Neither is the behavior in Linux. splice() in Linux has different behavior than in gVisor. This change documents it in the SpliceTooLong test. Reported-by: syzbot+b550e78e5c24d1d521f2@syzkaller.appspotmail.com PiperOrigin-RevId: 352091286
2021-01-15Add fsstress testsFabricio Voznika
Updates #5273 PiperOrigin-RevId: 352088736
2021-01-15Support TEST_PREMATURE_EXIT_FILE in syscall testsFabricio Voznika
PiperOrigin-RevId: 352068182
2021-01-15Add sanity check on return values from WriteTing-Yu Wang
io.Writer.Write requires err to be non-nil if n < len(v). We could allow this but it will be irreversible if users depend on this behavior. Ported the test that discovered this. PiperOrigin-RevId: 352065946
2021-01-15Add tests for cases of ARP failures on TCP connectMithun Iyer
Also fix test expectation for UDP sendto() case in tuntap syscall test. Fixes #5155 PiperOrigin-RevId: 352056612
2021-01-14Simplify the pipe implementation.Jamie Liu
- Remove the pipe package's dependence on the buffer package, which becomes unused as a result. The buffer package is currently intended to serve two use cases, pipes and temporary buffers, and does neither optimally as a result; this change facilitates retooling the buffer package to better serve the latter. - Pass callbacks taking safemem.BlockSeq to the internal pipe I/O methods, which makes most callbacks trivial. - Fix VFS1's splice() and tee() to immediately return if a pipe returns a partial write. PiperOrigin-RevId: 351911375
2021-01-14Check for existence before permissionsFabricio Voznika
Return EEXIST when overwritting a file as long as the caller has exec permission on the parent directory, even if the caller doesn't have write permission. Also reordered the mount write check, which happens before permission is checked. Closes #5164 PiperOrigin-RevId: 351868123
2021-01-13Switch uses of os.Getenv that check for empty string to os.LookupEnv.Dean Deng
Whether the variable was found is already returned by syscall.Getenv. os.Getenv drops this value while os.Lookupenv passes it along. PiperOrigin-RevId: 351674032
2021-01-13Fix minor typosMichael Pratt
PiperOrigin-RevId: 351606635
2021-01-12Delete shim v1Fabricio Voznika
gvisor-containerd-shim is not compatible with containerd 1.1 or earlier. Starting from containerd 1.2, shim v2 is the preferred interface. PiperOrigin-RevId: 351485556
2021-01-12[rack] Set up TLP timer and configure timeout.Ayush Ranjan
This change implements TLP details enumerated in https://tools.ietf.org/html/draft-ietf-tcpm-rack-08#section-7.5.1. Fixes #5083 PiperOrigin-RevId: 351467357
2021-01-12Fix simple mistakes identified by goreportcard.Adin Scannell
These are primarily simplification and lint mistakes. However, minor fixes are also included and tests added where appropriate. PiperOrigin-RevId: 351425971
2021-01-07Fix tuntap_test to cleanup after CreateInterfaceNoCapMithun Iyer
PiperOrigin-RevId: 350646249
2021-01-07netstack: Refactor tcpip.Endpoint.ReadTing-Yu Wang
Read now takes a destination io.Writer, count, options. Keeping the method name Read, in contrast to the Write method. This enables: * direct transfer of views under VV * zero copy It also eliminates the need for sentry to keep a slice of view because userspace had requested a read that is smaller than the view returned, removing the complexity there. Read/Peek/ReadPacket are now consolidated together and some duplicate code is removed. PiperOrigin-RevId: 350636322
2021-01-07Fix native benchmarks.Adin Scannell
PiperOrigin-RevId: 350509137
2021-01-06Run external networking testKevin Krakauer
PiperOrigin-RevId: 350438564
2021-01-06Support add/remove IPv6 multicast group sock optGhanan Gowripalan
IPv4 was always supported but UDP never supported joining/leaving IPv6 multicast groups via socket options. Add: IPPROTO_IPV6, IPV6_JOIN_GROUP/IPV6_ADD_MEMBERSHIP Remove: IPPROTO_IPV6, IPV6_LEAVE_GROUP/IPV6_DROP_MEMBERSHIP Test: integration_test.TestUDPAddRemoveMembershipSocketOption PiperOrigin-RevId: 350396072
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