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2019-08-27Fix sendfile(2) error codeFabricio Voznika
When output file is in append mode, sendfile(2) should fail with EINVAL and not EBADF. Closes #721 PiperOrigin-RevId: 265718958
2019-08-26Internal change.gVisor bot
PiperOrigin-RevId: 265535438
2019-08-23Second try at flaky futex test.Zach Koopmans
The flake had the call to futex_unlock_pi() returning EINVAL with the FUTEX_OWNER_DIED set. In this case, userspace has to clean up stale state. So instead of calling FUTEX_UNLOCK_PI outright, we'll use the advised atomic compare_exchange as advised in the man page. PiperOrigin-RevId: 265163920
2019-08-22Remove ASSERT from fork childMichael Pratt
The gunit macros are not safe to use in the child. PiperOrigin-RevId: 264904348
2019-08-21Support binding to multicast and broadcast addressesChris Kuiper
This fixes the issue of not being able to bind to either a multicast or broadcast address as well as to send and receive data from it. The way to solve this is to treat these addresses similar to the ANY address and register their transport endpoint ID with the global stack's demuxer rather than the NIC's. That way there is no need to require an endpoint with that multicast or broadcast address. The stack's demuxer is in fact the only correct one to use, because neither broadcast- nor multicast-bound sockets care which NIC a packet was received on (for multicast a join is still needed to receive packets on a NIC). I also took the liberty of refactoring udp_test.go to consolidate a lot of duplicate code and make it easier to create repetitive tests that test the same feature for a variety of packet and socket types. For this purpose I created a "flowType" that represents two things: 1) the type of packet being sent or received and 2) the type of socket used for the test. E.g., a "multicastV4in6" flow represents a V4-mapped multicast packet run through a V6-dual socket. This allows writing significantly simpler tests. A nice example is testTTL(). PiperOrigin-RevId: 264766909
2019-08-21tests: retry connect if it fails with EINTRAndrei Vagin
test/syscalls/linux/proc_net_tcp.cc:252: Failure Value of: connect(client->get(), &addr, addrlen) Expected: not -1 (success) Actual: -1 (of type int), with errno PosixError(errno=4 Interrupted system call) PiperOrigin-RevId: 264743815
2019-08-20Add tests for raw AF_PACKET sockets.Kevin Krakauer
PiperOrigin-RevId: 264494359
2019-08-20Fix flaky futex test.Zach Koopmans
The test is long running (175128 ms or so) which causes timeouts. The test simply makes sure that private futexes can acquire locks concurrently. Dropping current threads and increasing the number of locks each thread tests the same concurrency concerns but drops execution time to ~1411 ms. PiperOrigin-RevId: 264476144
2019-08-19Read iptables via sockopts.Kevin Krakauer
PiperOrigin-RevId: 264180125
2019-08-16netstack: disconnect an unix socket only if the address family is AF_UNSPECAndrei Vagin
Linux allows to call connect for ANY and the zero port. PiperOrigin-RevId: 263892534
2019-08-15Add tests for "cooked" AF_PACKET sockets.Kevin Krakauer
PiperOrigin-RevId: 263666789
2019-08-14Improve SendMsg performance.Bhasker Hariharan
SendMsg before this change would copy all the data over into a new slice even if the underlying socket could only accept a small amount of data. This is really inefficient with non-blocking sockets and under high throughput where large writes could get ErrWouldBlock or if there was say a timeout associated with the sendmsg() syscall. With this change we delay copying bytes in till they are needed and only copy what can be potentially sent/held in the socket buffer. Reducing the need to repeatedly copy data over. Also a minor fix to change state FIN-WAIT-1 when shutdown(..., SHUT_WR) is called instead of when we transmit the actual FIN. Otherwise the socket could remain in CONNECTED state even though the user has called shutdown() on the socket. Updates #627 PiperOrigin-RevId: 263430505
2019-08-12Compute size of struct tcp_info instead of hardcoding it.Rahat Mahmood
PiperOrigin-RevId: 263040624
2019-08-09netlink: return an error in nlmsgerrAndrei Vagin
Now if a process sends an unsupported netlink requests, an error is returned from the send system call. The linux kernel works differently in this case. It returns errors in the nlmsgerr netlink message. Reported-by: syzbot+571d99510c6f935202da@syzkaller.appspotmail.com PiperOrigin-RevId: 262690453
2019-08-06Fix for a panic due to writing to a closed accept channel.Bhasker Hariharan
This can happen because endpoint.Close() closes the accept channel first and then drains/resets any accepted but not delivered connections. But there can be connections that are connected but not delivered to the channel as the channel was full. But closing the channel can cause these writes to fail with a write to a closed channel. The correct solution is to abort any connections in SYN-RCVD state and drain/abort all completed connections before closing the accept channel. PiperOrigin-RevId: 261951132
2019-08-06Require pread/pwrite for splice file offsetsMichael Pratt
If there is an offset, the file must support pread/pwrite. See fs/splice.c:do_splice. PiperOrigin-RevId: 261944932
2019-08-02Job control: controlling TTYs and foreground process groups.Kevin Krakauer
(Don't worry, this is mostly tests.) Implemented the following ioctls: - TIOCSCTTY - set controlling TTY - TIOCNOTTY - remove controlling tty, maybe signal some other processes - TIOCGPGRP - get foreground process group. Also enables tcgetpgrp(). - TIOCSPGRP - set foreground process group. Also enabled tcsetpgrp(). Next steps are to actually turn terminal-generated control characters (e.g. C^c) into signals to the proper process groups, and to send SIGTTOU and SIGTTIN when appropriate. PiperOrigin-RevId: 261387276
2019-08-02Automated rollback of changelist 261191548Rahat Mahmood
PiperOrigin-RevId: 261373749
2019-08-01Implement getsockopt(TCP_INFO).Rahat Mahmood
Export some readily-available fields for TCP_INFO and stub out the rest. PiperOrigin-RevId: 261191548
2019-07-31Basic support for 'ip route'Ian Lewis
Implements support for RTM_GETROUTE requests for netlink sockets. Fixes #507 PiperOrigin-RevId: 261051045
2019-07-31Fix ICMPv4 EchoReply packet checksumAustin Kiekintveld
The checksum was not being reset before being re-calculated and sent out. This caused the sent checksum to always be `0x0800`. Fixes #605. PiperOrigin-RevId: 260965059
2019-07-31Test connecting UDP sockets to the ANY addressTamir Duberstein
This doesn't currently pass on gVisor. While I'm here, fix a bug where connecting to the v6-mapped v4 address doesn't work in gVisor. PiperOrigin-RevId: 260923961
2019-07-29Fix flaky stat.cc test.Zach Koopmans
This test flaked on my current CL. Linux makes no guarantee that two inodes will consecutive (overflows happen). https://github.com/avagin/linux-task-diag/blob/master/fs/inode.c#L880 PiperOrigin-RevId: 260608240
2019-07-29Add iptables types for syscalls tests.Kevin Krakauer
Unfortunately, Linux's ip_tables.h header doesn't compile in C++ because it implicitly converts from void* to struct xt_entry_target*. C allows this, but C++ does not. So we have to re-implement many types ourselves. Relevant code here: https://github.com/torvalds/linux/blob/master/include/uapi/linux/netfilter_ipv4/ip_tables.h#L222 PiperOrigin-RevId: 260565570
2019-07-23Deduplicate EndpointState.connected someTamir Duberstein
This fixes a bug introduced in cl/251934850 that caused connect-accept-close-connect races to result in the second connect call failiing when it should have succeeded. PiperOrigin-RevId: 259584525
2019-07-19Merge pull request #450 from Pixep:feature/add-clock-boottime-as-monotonicgVisor bot
PiperOrigin-RevId: 258996346
2019-07-19Handle interfaceAddr and NIC options separately for IP_MULTICAST_IFChris Kuiper
This tweaks the handling code for IP_MULTICAST_IF to ignore the InterfaceAddr if a NICID is given. PiperOrigin-RevId: 258982541
2019-07-18net/tcp/setockopt: impelment setsockopt(fd, SOL_TCP, TCP_INQ)Andrei Vagin
PiperOrigin-RevId: 258859507
2019-07-17Add AF_UNIX, SOCK_RAW sockets, which exist for some reason.Kevin Krakauer
tcpdump creates these. PiperOrigin-RevId: 258611829
2019-07-17Merge pull request #533 from kevinGC:stub-dev-ttygVisor bot
PiperOrigin-RevId: 258607547
2019-07-17Properly invalidate cache in rename and removeMichael Pratt
We were invalidating the wrong overlayEntry in rename and missing invalidation in rename and remove if lower exists. PiperOrigin-RevId: 258604685
2019-07-16Add CLOCK_BOOTTIME tests to timerfd.ccAdrien Leravat
2019-07-16Internal change.gVisor bot
PiperOrigin-RevId: 258424489
2019-07-15Replace vector of arrays with array of arrays.Kevin Krakauer
C++ does not like vectors of arrays (because arrays are not copy-constructable). PiperOrigin-RevId: 258270980
2019-07-15Fix initialization of badhandler_low_water_mark in SigaltstackTest.Neel Natu
It is now correctly initialized to the top of the signal stack. Previously it was initialized to the address of 'stack.ss_sp' on the main thread stack. PiperOrigin-RevId: 258248363
2019-07-12Add IPPROTO_RAW, which allows raw sockets to write IP headers.Kevin Krakauer
iptables also relies on IPPROTO_RAW in a way. It opens such a socket to manipulate the kernel's tables, but it doesn't actually use any of the functionality. Blegh. PiperOrigin-RevId: 257903078
2019-07-12Add permission, char device, and uid checks.Kevin Krakauer
Change-Id: I8307bfb390a56424aaa651285a218aad277c4aed
2019-07-12Stub out support for TCP_MAXSEG.Bhasker Hariharan
Adds support to set/get the TCP_MAXSEG value but does not really change the segment sizes emitted by netstack or alter the MSS advertised by the endpoint. This is currently being added only to unblock iperf3 on gVisor. Plumbing this correctly requires a bit more work which will come in separate CLs. PiperOrigin-RevId: 257859112
2019-07-12Merge pull request #282 from zhangningdlut:chris_test_procgVisor bot
PiperOrigin-RevId: 257855479
2019-07-11Add a stub for /dev/tty.Kevin
Actual implementation to follow, but this will satisfy applications that want it to just exist.
2019-07-09tss: block userspace access to all I/O ports.Liu Hua
A userspace process (CPL=3) can access an i/o port if the bit corresponding to the port is set to 0 in the I/O permission bitmap. Configure the I/O permission bitmap address beyond the last valid byte in the TSS so access to all i/o ports is blocked. Signed-off-by: Liu Hua <sdu.liu@huawei.com> Change-Id: I3df76980c3735491db768f7210e71703f86bb989 PiperOrigin-RevId: 257336518
2019-07-08Don't mask errors in createAt loop.Nicolas Lacasse
The error set in the loop in createAt was being masked by other errors declared with ":=". This allowed an ErrResolveViaReadlink error to escape, which can cause a sentry panic. Added test case which repros without the fix. PiperOrigin-RevId: 257061767
2019-07-03netstack/udp: connect with the AF_UNSPEC address family means disconnectAndrei Vagin
PiperOrigin-RevId: 256433283
2019-07-02Mark timers_test flaky because setrlimit(RLIMIT_CPU) is broken in some kernels.Neel Natu
https://bugzilla.redhat.com/show_bug.cgi?id=1568337 PiperOrigin-RevId: 256276198
2019-07-01Check remaining traversal limit when creating a file through a symlink.Nicolas Lacasse
This fixes the case when an app tries to create a file that already exists, and is a symlink to itself. A test was added. PiperOrigin-RevId: 256044811
2019-06-28Fix suggestions from clang.Nicolas Lacasse
PiperOrigin-RevId: 255679603
2019-06-27Complete pipe support on overlayfsFabricio Voznika
Get/Set pipe size and ioctl support were missing from overlayfs. It required moving the pipe.Sizer interface to fs so that overlay could get access. Fixes #318 PiperOrigin-RevId: 255511125
2019-06-27Fix various spelling issues in the documentationMichael Pratt
Addresses obvious typos, in the documentation only. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65 PiperOrigin-RevId: 255477779
2019-06-27Merge pull request #461 from brb-g:128_procseekendgVisor bot
PiperOrigin-RevId: 255462850
2019-06-26Follow symlinks when creating a file, and create the target.Nicolas Lacasse
If we have a symlink whose target does not exist, creating the symlink (either via 'creat' or 'open' with O_CREAT flag) should create the target of the symlink. Previously, gVisor would error with EEXIST in this case PiperOrigin-RevId: 255232944
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