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2021-06-09Merge release-20210601.0-28-g2e574a990 (automated)gVisor bot
2021-06-09Avoid fanout group collisions with best effortKevin Krakauer
Running multiple instances of netstack in the same network namespace can cause collisions when enabling packet fanout for fdbased endpoints. The only bulletproof fix is to run in different network namespaces, but by using `getpid()` instead of 0 as the fanout ID starting point we can avoid collisions in the common case, particularly when testing/experimenting. Addresses #6124
2021-05-22Merge release-20210518.0-25-g74b10e31a (automated)gVisor bot
2021-05-22Remove detritusTamir Duberstein
- Unused constants - Unused functions - Unused arguments - Unkeyed literals - Unnecessary conversions PiperOrigin-RevId: 375253464
2021-05-12Merge release-20210503.0-47-g07e32fa69 (automated)gVisor bot
2021-05-03Merge release-20210419.0-55-gf0b3298db (automated)gVisor bot
2021-05-03Convey GSO capabilities through GSOEndpointGhanan Gowripalan
...as all GSO capable endpoints must implement GSOEndpoint. PiperOrigin-RevId: 371804175
2021-04-27Merge release-20210419.0-35-gf54d87b9e (automated)gVisor bot
2021-04-27Remove uses of the binary package from networking code.Rahat Mahmood
Co-Author: ayushranjan PiperOrigin-RevId: 370785009
2021-04-22Merge release-20210419.0-18-g47bc11515 (automated)gVisor bot
2021-04-21Only carry GSO options in the packet bufferGhanan Gowripalan
With this change, GSO options no longer needs to be passed around as a function argument in the write path. This change is done in preparation for a later change that defers segmentation, and may change GSO options for a packet as it flows down the stack. Updates #170. PiperOrigin-RevId: 369774872
2021-03-24Merge release-20210315.0-23-ge7ca2a51a (automated)gVisor bot
2021-03-24Add POLLRDNORM/POLLWRNORM support.Bhasker Hariharan
On Linux these are meant to be equivalent to POLLIN/POLLOUT. Rather than hack these on in sys_poll etc it felt cleaner to just cleanup the call sites to notify for both events. This is what linux does as well. Fixes #5544 PiperOrigin-RevId: 364859977
2021-03-24Fix data race in fdbased when accessing fanoutID.Bhasker Hariharan
PiperOrigin-RevId: 364859173
2021-03-23Merge release-20210315.0-15-gacb4c6288 (automated)gVisor bot
2021-03-16Merge release-20210309.0-27-gb1d578772 (automated)gVisor bot
2021-03-15Make netstack (//pkg/tcpip) buildable for 32 bitKevin Krakauer
Doing so involved breaking dependencies between //pkg/tcpip and the rest of gVisor, which are discouraged anyways. Tested on the Go branch via: gvisor.dev/gvisor/pkg/tcpip/... Addresses #1446. PiperOrigin-RevId: 363081778
2021-03-10Merge release-20210301.0-31-g2a888a106 (automated)gVisor bot
2021-03-09Give TCP flags a dedicated typeZeling Feng
- Implement Stringer for it so that we can improve error messages. - Use TCPFlags through the code base. There used to be a mixed usage of byte, uint8 and int as TCP flags. PiperOrigin-RevId: 361940150
2021-03-04Merge release-20210301.0-12-g1cd76d958 (automated)gVisor bot
2021-03-03Make dedicated methods for data operations in PacketBufferTing-Yu Wang
One of the preparation to decouple underlying buffer implementation. There are still some methods that tie to VectorisedView, and they will be changed gradually in later CLs. This CL also introduce a new ICMPv6ChecksumParams to replace long list of parameters when calling ICMPv6Checksum, aiming to be more descriptive. PiperOrigin-RevId: 360778149
2021-03-03Merge release-20210301.0-5-ga9441aea2 (automated)gVisor bot
2021-03-03[op] Replace syscall package usage with golang.org/x/sys/unix in pkg/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in the following places: - pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities are not yet available in golang.org/x/sys. - syscall.Stat_t is still used in some places because os.FileInfo.Sys() still returns it and not unix.Stat_t. Updates #214 PiperOrigin-RevId: 360701387
2021-02-24Merge release-20210208.0-89-gba4dfa717 (automated)gVisor bot
2021-02-24Move //pkg/gate.Gate to //pkg/sync.Jamie Liu
- Use atomic add rather than CAS in every Gate method, which is slightly faster in most cases. - Implement Close wakeup using gopark/goready to avoid channel allocation. New benchmarks: name old time/op new time/op delta GateEnterLeave-12 16.7ns ± 1% 10.3ns ± 1% -38.44% (p=0.000 n=9+8) GateClose-12 50.2ns ± 8% 42.4ns ± 6% -15.44% (p=0.000 n=10+10) GateEnterLeaveAsyncClose-12 972ns ± 2% 640ns ± 7% -34.15% (p=0.000 n=9+10) PiperOrigin-RevId: 359336344
2021-02-18Merge release-20210208.0-73-gf80a857a4 (automated)gVisor bot
2021-02-18Bump build constraints to Go 1.18Michael Pratt
These are bumped to allow early testing of Go 1.17. Use will be audited closer to the 1.17 release. PiperOrigin-RevId: 358278615
2021-02-07Merge release-20210125.0-97-g554c405e8 (automated)gVisor bot
2021-02-06Synchronously send packets over pipe link endpointGhanan Gowripalan
Before this change, packets were delivered asynchronously to the remote end of a pipe. This was to avoid a deadlock during link resolution where the stack would attempt to double-lock a mutex (see removed comments in the parent commit for details). As of https://github.com/google/gvisor/commit/4943347137, we do not hold locks while sending link resolution probes so the deadlock will no longer occur. PiperOrigin-RevId: 356066224
2021-01-29Merge release-20210125.0-21-g8d1afb418 (automated)gVisor bot
2021-01-28Change tcpip.Error to an interfaceTamir Duberstein
This makes it possible to add data to types that implement tcpip.Error. ErrBadLinkEndpoint is removed as it is unused. PiperOrigin-RevId: 354437314
2021-01-26Merge release-20210112.0-86-gb4665aef8 (automated)gVisor bot
2021-01-25fdbased: Dedup code related to iovec readingTing-Yu Wang
PiperOrigin-RevId: 353755271
2021-01-21Merge release-20210112.0-60-g89df5a681 (automated)gVisor bot
2021-01-21Queue packets in WritePackets when resolving link addressGhanan Gowripalan
Test: integration_test.TestWritePacketsLinkResolution Fixes #4458. PiperOrigin-RevId: 353108826
2021-01-21Merge release-20210112.0-59-g0ca4cf769 (automated)gVisor bot
2021-01-21Populate EgressRoute, GSO, Netproto in NICGhanan Gowripalan
fdbased and qdisc layers expect these fields to already be populated before being reached. PiperOrigin-RevId: 353099492
2021-01-16Merge release-20210112.0-39-g2814a032b (automated)gVisor bot
2021-01-15Support GetLinkAddress with neighborCacheGhanan Gowripalan
Test: integration_test.TestGetLinkAddress PiperOrigin-RevId: 352119404
2021-01-16Merge release-20210112.0-38-gfd5b52c87 (automated)gVisor bot
2021-01-15Only pass stack.Route's fields to LinkEndpointsGhanan Gowripalan
stack.Route is used to send network packets and resolve link addresses. A LinkEndpoint does not need to do either of these and only needs the route's fields at the time of the packet write request. Since LinkEndpoints only need the route's fields when writing packets, pass a stack.RouteInfo instead. PiperOrigin-RevId: 352108405
2021-01-15Merge release-20210112.0-34-g55c7fe48d (automated)gVisor bot
2021-01-15Populate EgressRoute, GSO, Netproto for batch writesGhanan Gowripalan
We loop over the list of packets anyways so setting these aren't expensive. Now that they are populated only by the link endpoint that uses them, TCP does not need to. PiperOrigin-RevId: 352090853
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
2021-01-12Fix 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
2021-01-06Merge release-20201208.0-118-g7817e3b5e (automated)gVisor bot
2021-01-06Do not filter frames in ethernet link endpointGhanan Gowripalan
Ethernet frames are usually filtered at the hardware-level so there is no need to filter the frames in software. For test purposes, a new link endpoint was introduced to filter frames based on their destination. PiperOrigin-RevId: 350422941
2020-12-28Merge release-20201208.0-89-g3ff7324df (automated)gVisor bot
2020-12-22Correctly log sniffed ARP packetsTamir Duberstein
This condition was inverted in 360006d. PiperOrigin-RevId: 348679088
2020-12-22Invoke address resolution upon subsequent traffic to Failed neighborPeter Johnston
Removes the period of time in which subseqeuent traffic to a Failed neighbor immediately fails with ErrNoLinkAddress. A Failed neighbor is one in which address resolution fails; or in other words, the neighbor's IP address cannot be translated to a MAC address. This means removing the Failed state for linkAddrCache and allowing transitiong out of Failed into Incomplete for neighborCache. Previously, both caches would transition entries to Failed after address resolution fails. In this state, any subsequent traffic requested within an unreachable time would immediately fail with ErrNoLinkAddress. This does not follow RFC 4861 section 7.3.3: If address resolution fails, the entry SHOULD be deleted, so that subsequent traffic to that neighbor invokes the next-hop determination procedure again. Invoking next-hop determination at this point ensures that alternate default routers are tried. The API for getting a link address for a given address, whether through the link address cache or the neighbor table, is updated to optionally take a callback which will be called when address resolution completes. This allows `Route` to handle completing link resolution internally, so callers of (*Route).Resolve (e.g. endpoints) don’t have to keep track of when it completes and update the Route accordingly. This change also removes the wakers from LinkAddressCache, NeighborCache, and Route in favor of the callbacks, and callers that previously used a waker can now just pass a callback to (*Route).Resolve that will notify the waker on resolution completion. Fixes #4796 Startblock: has LGTM from sbalana and then add reviewer ghanan PiperOrigin-RevId: 348597478
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