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2020-09-09Don't bind loopback to all IPs in an IPv6 subnetGhanan Gowripalan
An earlier change considered the loopback bound to all addresses in an assigned subnet. This should have only be done for IPv4 to maintain compatability with Linux: ``` $ ip addr show dev lo 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group ... link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever $ ping 2001:db8::1 PING 2001:db8::1(2001:db8::1) 56 data bytes ^C --- 2001:db8::1 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3062ms $ ping 2001:db8::2 PING 2001:db8::2(2001:db8::2) 56 data bytes ^C --- 2001:db8::2 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2030ms $ sudo ip addr add 2001:db8::1/64 dev lo $ ping 2001:db8::1 PING 2001:db8::1(2001:db8::1) 56 data bytes 64 bytes from 2001:db8::1: icmp_seq=1 ttl=64 time=0.055 ms 64 bytes from 2001:db8::1: icmp_seq=2 ttl=64 time=0.074 ms 64 bytes from 2001:db8::1: icmp_seq=3 ttl=64 time=0.073 ms 64 bytes from 2001:db8::1: icmp_seq=4 ttl=64 time=0.071 ms ^C --- 2001:db8::1 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3075ms rtt min/avg/max/mdev = 0.055/0.068/0.074/0.007 ms $ ping 2001:db8::2 PING 2001:db8::2(2001:db8::2) 56 data bytes From 2001:db8::1 icmp_seq=1 Destination unreachable: No route From 2001:db8::1 icmp_seq=2 Destination unreachable: No route From 2001:db8::1 icmp_seq=3 Destination unreachable: No route From 2001:db8::1 icmp_seq=4 Destination unreachable: No route ^C --- 2001:db8::2 ping statistics --- 4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3070ms ``` Test: integration_test.TestLoopbackAcceptAllInSubnet PiperOrigin-RevId: 329011566
2020-09-09Implement StatFS for various VFS2 filesystems.Rahat Mahmood
This mainly involved enabling kernfs' client filesystems to provide a StatFS implementation. Fixes #3411, #3515. PiperOrigin-RevId: 329009864
2020-09-09Improve type safety for network protocol optionsGhanan Gowripalan
The existing implementation for NetworkProtocol.{Set}Option take arguments of an empty interface type which all types (implicitly) implement; any type may be passed to the functions. This change introduces marker interfaces for network protocol options that may be set or queried which network protocol option types implement to ensure that invalid types are caught at compile time. Different interfaces are used to allow the compiler to enforce read-only or set-only socket options. PiperOrigin-RevId: 328980359
2020-09-09Fix EOF handling for splice.Dean Deng
Also, add corresponding EOF tests for splice/sendfile. Discovered by syzkaller. PiperOrigin-RevId: 328975990
2020-09-09fix panic when calling SO_ORIGINAL_DST without initializing iptablesKevin Krakauer
Reported-by: syzbot+074ec22c42305725b79f@syzkaller.appspotmail.com PiperOrigin-RevId: 328963899
2020-09-09Add test demonstrating accept bugTamir Duberstein
Updates #3780. PiperOrigin-RevId: 328922573
2020-09-09Use a single NetworkEndpoint per addressGhanan Gowripalan
This change was already done as of https://github.com/google/gvisor/commit/1736b2208f but https://github.com/google/gvisor/commit/a174aa7597 conflicted with that change and it was missed in reviews. This change fixes the conflict. PiperOrigin-RevId: 328920372
2020-09-09[go-marshal] Enable auto-marshalling for tundev.Ayush Ranjan
PiperOrigin-RevId: 328863725
2020-09-09Fix vfs2 pipe behavior when splicing to a non-pipe.Dean Deng
Fixes *.sh Java runtime tests, where splice()-ing from a pipe to /dev/zero would not actually empty the pipe. There was no guarantee that the data would actually be consumed on a splice operation unless the output file's implementation of Write/PWrite actually called VFSPipeFD.CopyIn. Now, whatever bytes are "written" are consumed regardless of whether CopyIn is called or not. Furthermore, the number of bytes in the IOSequence for reads is now capped at the amount of data actually available. Before, splicing to /dev/zero would always return the requested splice size without taking the actual available data into account. This change also refactors the case where an input file is spliced into an output pipe so that it follows a similar pattern, which is arguably cleaner anyway. Updates #3576. PiperOrigin-RevId: 328843954
2020-09-09unix: return ECONNREFUSE if a socket file exists but a socket isn't bound to itAndrei Vagin
PiperOrigin-RevId: 328843560
2020-09-09[go-marshal] Support for usermem.IOOpts.Ayush Ranjan
PiperOrigin-RevId: 328839759
2020-09-09Improve type safety for socket optionsGhanan Gowripalan
The existing implementation for {G,S}etSockOpt take arguments of an empty interface type which all types (implicitly) implement; any type may be passed to the functions. This change introduces marker interfaces for socket options that may be set or queried which socket option types implement to ensure that invalid types are caught at compile time. Different interfaces are used to allow the compiler to enforce read-only or set-only socket options. Fixes #3714. RELNOTES: n/a PiperOrigin-RevId: 328832161
2020-09-09beef up write syscall testsJinmou Li
Added a few tests for write(2) and pwrite(2) 1. Regular Files For write(2) - write zero bytes should not move the offset - write non-zero bytes should increment the offset the exact amount - write non-zero bytes after a lseek() should move the offset the exact amount after the seek - write non-zero bytes with O_APPEND should move the offset the exact amount after original EOF For pwrite(2), offset is not affected when - pwrite zero bytes - pwrite non-zero bytes For EOF, added a test asserting the EOF (indicated by lseek(SEEK_END)) is updated properly after writing non-zero bytes 2. Symlink Added one pwite64() call for symlink that is written as a counterpart of the existing test using pread64()
2020-09-09Fix BadSocketPair for open source.Zach Koopmans
BadSocketPair test will return several errnos (EPREM, ESOCKTNOSUPPORT, EAFNOSUPPORT) meaning the test is just too specific. Checking the syscall fails is appropriate. PiperOrigin-RevId: 328813071
2020-09-09Skip IPv6UDPUnboundSocketNetlinkTest on native linuxGhanan Gowripalan
...while we figure out of we want to consider the loopback interface bound to all IPs in an assigned IPv6 subnet, or not (to maintain compatibility with Linux). PiperOrigin-RevId: 328807974
2020-09-09Add function to get error from a tcpip.EndpointGhanan Gowripalan
In an upcoming CL, socket option types are made to implement a marker interface with pointer receivers. Since this results in calling methods of an interface with a pointer, we incur an allocation when attempting to get an Endpoint's last error with the current implementation. When calling the method of an interface, the compiler is unable to determine what the interface implementation does with the pointer (since calling a method on an interface uses virtual dispatch at runtime so the compiler does not know what the interface method will do) so it allocates on the heap to be safe incase an implementation continues to hold the pointer after the functioon returns (the reference escapes the scope of the object). In the example below, the compiler does not know what b.foo does with the reference to a it allocates a on the heap as the reference to a may escape the scope of a. ``` var a int var b someInterface b.foo(&a) ``` This change removes the opportunity for that allocation. RELNOTES: n/a PiperOrigin-RevId: 328796559
2020-09-09ip6tables: (de)serialize ip6tables structsKevin Krakauer
More implementation+testing to follow. #3549. PiperOrigin-RevId: 328770160
2020-09-09Fix JobControl tests for open source.Zach Koopmans
ioctl calls with TIOCSCTTY fail if the calling process already has a controlling terminal, which occurs on a 5.4 kernel like our Ubuntu 18 CI. Thus, run tests calling ioctl TTOCSCTTY in clean subprocess. Also, while we're here, switch out non-inclusive master/slave for main/replica. PiperOrigin-RevId: 328756598
2020-09-09Make flag propagation automaticFabricio Voznika
Use reflection and tags to provide automatic conversion from Config to flags. This makes adding new flags less error-prone, skips flags using default values (easier to read), and makes tests correctly use default flag values for test Configs. Updates #3494 PiperOrigin-RevId: 328662070
2020-09-09Device major number greater than 2 digits in /proc/self/maps on arm64 N1 machineBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-09-09use is-active instead of statusmakocchi-git
2020-09-09Support stdlib analyzers with nogo.Adin Scannell
This immediately revealed an escape analysis violation (!), where the sync.Map was being used in a context that escapes were not allowed. This is a relatively minor fix and is included. PiperOrigin-RevId: 328611237
2020-09-09Remove spurious fd.IncRef().Nicolas Lacasse
PiperOrigin-RevId: 328583461
2020-09-09[runtime-tests] Exclude flaky nodejs test.Ayush Ranjan
PiperOrigin-RevId: 328579755
2020-09-09tmpfs: Allow xattrs in the trusted namespace if creds has CAP_SYS_ADMIN.Nicolas Lacasse
This is needed to support the overlay opaque attribute. PiperOrigin-RevId: 328552985
2020-09-09Fix SocketPairTest and BadSocketPairTest in opensource.Zach Koopmans
PiperOrigin-RevId: 328467152
2020-09-09Use new reference count utility throughout gvisor.Dean Deng
This uses the refs_vfs2 template in vfs2 as well as objects common to vfs1 and vfs2. Note that vfs1-only refcounts are not replaced, since vfs1 will be deleted soon anyway. The following structs now use the new tool, with leak check enabled: devpts:rootInode fuse:inode kernfs:Dentry kernfs:dir kernfs:readonlyDir kernfs:StaticDirectory proc:fdDirInode proc:fdInfoDirInode proc:subtasksInode proc:taskInode proc:tasksInode vfs:FileDescription vfs:MountNamespace vfs:Filesystem sys:dir kernel:FSContext kernel:ProcessGroup kernel:Session shm:Shm mm:aioMappable mm:SpecialMappable transport:queue And the following use the template, but because they currently are not leak checked, a TODO is left instead of enabling leak check in this patch: kernel:FDTable tun:tunEndpoint Updates #1486. PiperOrigin-RevId: 328460377
2020-09-09Return non-zero size for tmpfs statfs(2).Jamie Liu
This does not implement accepting or enforcing any size limit, which will be more complex and has performance implications; it just returns a fixed non-zero size. Updates #1936 PiperOrigin-RevId: 328428588
2020-09-09Expose basic coverage information to userspace through kcov interface.Dean Deng
In Linux, a kernel configuration is set that compiles the kernel with a custom function that is called at the beginning of every basic block, which updates the memory-mapped coverage information. The Go coverage tool does not allow us to inject arbitrary instructions into basic blocks, but it does provide data that we can convert to a kcov-like format and transfer them to userspace through a memory mapping. Note that this is not a strict implementation of kcov, which is especially tricky to do because we do not have the same coverage tools available in Go that that are available for the actual Linux kernel. In Linux, a kernel configuration is set that compiles the kernel with a custom function that is called at the beginning of every basic block to write program counters to the kcov memory mapping. In Go, however, coverage tools only give us a count of basic blocks as they are executed. Every time we return to userspace, we collect the coverage information and write out PCs for each block that was executed, providing userspace with the illusion that the kcov data is always up to date. For convenience, we also generate a unique synthetic PC for each block instead of using actual PCs. Finally, we do not provide thread-specific coverage data (each kcov instance only contains PCs executed by the thread owning it); instead, we will supply data for any file specified by -- instrumentation_filter. Also, fix issue in nogo that was causing pkg/coverage:coverage_nogo compilation to fail. PiperOrigin-RevId: 328426526
2020-09-09Only send an ICMP error message if UDP checksum is valid.Toshi Kikuchi
Test: - TestV4UnknownDestination - TestV6UnknownDestination PiperOrigin-RevId: 328424137
2020-09-09[go-marshal] Enable auto-marshalling for host tty.Ayush Ranjan
PiperOrigin-RevId: 328415633
2020-09-09Link to PHP bug for disabled disk space tests.Jamie Liu
PiperOrigin-RevId: 328410399
2020-09-09overlay: clonePrivateMount must pass a Dentry reference to MakeVirtualDentry.Nicolas Lacasse
PiperOrigin-RevId: 328410065
2020-09-09Clarify comment on NetworkProtocolNumber.Bhasker Hariharan
The actual values used for this field in Netstack are actually EtherType values of the protocol in an Ethernet frame. Eg. header.IPv4ProtocolNumber is 0x0800 and not the number of the IPv4 Protocol Number itself which is 4. Similarly header.IPv6ProtocolNumber is set to 0x86DD whereas the IPv6 protocol number is 41. See: - https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml (For EtherType) - https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml (For ProtocolNumbers) PiperOrigin-RevId: 328407293
2020-09-09Provide --secret-keyring parameter (for newer gpg).Adin Scannell
PiperOrigin-RevId: 328403914
2020-09-09remove iptables sockopt special casesKevin Krakauer
iptables sockopts were kludged into an unnecessary check, this properly relegates them to the {get,set}SockOptIP functions. PiperOrigin-RevId: 328395135
2020-09-09Include shim in individual released binaries.Adin Scannell
The debian rules are also moved to the top-level, since they apply to binaries outside the //runsc directory. Fixes #3665 PiperOrigin-RevId: 328379709
2020-09-09Add nogo support to go_binary and go_test targets.Adin Scannell
Updates #3374 PiperOrigin-RevId: 328378700
2020-09-09Change "Fd" member to "FD" according to convensiongVisor bot
PiperOrigin-RevId: 328374775
2020-09-09Add option to replace linkAddrCache with neighborCacheSam Balana
This change adds an option to replace the current implementation of ARP through linkAddrCache, with an implementation of NUD through neighborCache. Switching to using NUD for both ARP and NDP is beneficial for the reasons described by RFC 4861 Section 3.1: "[Using NUD] significantly improves the robustness of packet delivery in the presence of failing routers, partially failing or partitioned links, or nodes that change their link-layer addresses. For instance, mobile nodes can move off-link without losing any connectivity due to stale ARP caches." "Unlike ARP, Neighbor Unreachability Detection detects half-link failures and avoids sending traffic to neighbors with which two-way connectivity is absent." Along with these changes exposes the API for querying and operating the neighbor cache. Operations include: - Create a static entry - List all entries - Delete all entries - Remove an entry by address This also exposes the API to change the NUD protocol constants on a per-NIC basis to allow Neighbor Discovery to operate over links with widely varying performance characteristics. See [RFC 4861 Section 10][1] for the list of constants. Finally, an API for subscribing to NUD state changes is exposed through NUDDispatcher. See [RFC 4861 Appendix C][3] for the list of edges. Tests: pkg/tcpip/network/arp:arp_test + TestDirectRequest pkg/tcpip/network/ipv6:ipv6_test + TestLinkResolution + TestNDPValidation + TestNeighorAdvertisementWithTargetLinkLayerOption + TestNeighorSolicitationResponse + TestNeighorSolicitationWithSourceLinkLayerOption + TestRouterAdvertValidation pkg/tcpip/stack:stack_test + TestCacheWaker + TestForwardingWithFakeResolver + TestForwardingWithFakeResolverManyPackets + TestForwardingWithFakeResolverManyResolutions + TestForwardingWithFakeResolverPartialTimeout + TestForwardingWithFakeResolverTwoPackets + TestIPv6SourceAddressSelectionScopeAndSameAddress [1]: https://tools.ietf.org/html/rfc4861#section-10 [2]: https://tools.ietf.org/html/rfc4861#appendix-C Fixes #1889 Fixes #1894 Fixes #1895 Fixes #1947 Fixes #1948 Fixes #1949 Fixes #1950 PiperOrigin-RevId: 328365034
2020-09-09Support SO_LINGER socket option.Nayana Bidari
When SO_LINGER option is enabled, the close will not return until all the queued messages are sent and acknowledged for the socket or linger timeout is reached. If the option is not set, close will return immediately. This option is mainly supported for connection oriented protocols such as TCP. PiperOrigin-RevId: 328350576
2020-09-09Disable PHP disk space tests.Jamie Liu
These tests print disk_free_space()/disk_total_space() and expect the printed result to be an integer (despite the fact that both the documented and returned type is float). After cl/297213789, free/total disk space on tmpfs is sufficiently large that PHP prints the result in scientific notation instead: ========DIFF======== 012+ float(9.2233720368548E+18) 013+ float(9.2233720368548E+18) 012- float(%d) 013- float(%d) ========DONE======== FAIL disk_total_space() and disk_free_space() tests [ext/standard/tests/file/disk.phpt] PiperOrigin-RevId: 328349906
2020-09-09[go-marshal] Support marshalling for structs with names starting with W.Ayush Ranjan
Due to how marshallable interface implementation was generated, we could not marshal a struct whose named started with W because there was a naming collision with parameter (w io.Writer) and type (w *StuctName). Used "writer" as parameter name to avoid collision. PiperOrigin-RevId: 328343930
2020-09-09Fix TCP_LINGER2 behavior to match linux.Bhasker Hariharan
We still deviate a bit from linux in how long we will actually wait in FIN-WAIT-2. Linux seems to cap it with TIME_WAIT_LEN and it's not completely obvious as to why it's done that way. For now I think we can ignore that and fix it if it really is an issue. PiperOrigin-RevId: 328324922
2020-09-09Fix deadlock in gofer direct IO.Dean Deng
Fixes several java runtime tests: java/nio/channels/FileChannel/directio/ReadDirect.java java/nio/channels/FileChannel/directio/PreadDirect.java Updates #3576. PiperOrigin-RevId: 328281849
2020-09-09Automated rollback of changelist 327325153Ghanan Gowripalan
PiperOrigin-RevId: 328259353
2020-09-09Flush in fsimpl/gofer.regularFileFD.OnClose() if there are no dirty pages.Jamie Liu
This is closer to indistinguishable from VFS1 behavior. PiperOrigin-RevId: 328256068
2020-09-09Add check for same source in merkle tree libgVisor bot
If the data is in the same Reader as the merkle tree, we should verify from the first layer in the tree, instead of from the beginning. PiperOrigin-RevId: 328230988
2020-09-09Remove go profiling flag from dockerutil.Zach Koopmans
Go profiling was removed from runsc debug in a previous change. PiperOrigin-RevId: 328203826
2020-09-09Bump build constraints to 1.17Michael Pratt
This enables pre-release testing with 1.16. The intention is to replace these with a nogo check before the next release. PiperOrigin-RevId: 328193911
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