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2021-10-06Clarify incorrect behavior on gVisorTamir Duberstein
Linux prevents setting `IP_MULTICAST_IF` to a device when `SO_BINDTODEVICE` is set to another device. gVsior allows this. PiperOrigin-RevId: 401267471
2021-10-06Clarify incorrect behavior on gVisorTamir Duberstein
gVisor is a strong host, preventing packets from being sent from a device using the another device's address as the source. Linux is a weak host which allows this. Updates #6686. PiperOrigin-RevId: 401260128
2021-10-06Do not skip IPv6 tests when we don't have IPv4Tamir Duberstein
PiperOrigin-RevId: 401251635
2021-10-05Centralize skip logicTamir Duberstein
- Inline `IfAddrHelper` into its sole user - Implement pretty-printing `sockaddr_ll` - Make test class members private, add const accessors - Log all interface addresses on SetUp for b/137899561 Simplify some things while I'm here. PiperOrigin-RevId: 401112402
2021-10-05Enable passing syscall testsTamir Duberstein
PiperOrigin-RevId: 400952164
2021-10-01Merge pull request #6551 from sudo-sturbia:msgqueue/procfsgVisor bot
PiperOrigin-RevId: 400258924
2021-09-27Add procfs files for SysV message queues.Zyad A. Ali
2021-09-24Merge pull request #6570 from sudo-sturbia:ipc/procgVisor bot
PiperOrigin-RevId: 398849334
2021-09-24Run proc's static-file tests in a container.Zyad A. Ali
Some /proc files are static in gVisor, but can be updated in native linux. To test the values of these files, move them to a separate test and run it using "container" tag to avoid faulty comparisons in native. Since a separate IPC namespace is used, update shm comparisons to check the actual value, not an interval.
2021-09-23Compose ICMP endpoint with datagram-based endpointGhanan Gowripalan
An ICMP endpoint's write path can use the datagram-based endpoint. Updates #6565. Test: Datagram-based generic socket + ICMP/ping syscall tests. PiperOrigin-RevId: 398539844
2021-09-21Handle Shutdown on connecting tcp socketArthur Sfez
Fixes #6495 PiperOrigin-RevId: 398121921
2021-09-21Deliver endpoints to the accept queue synchronously when possibleArthur Sfez
Before this change, when a new connection was created after receiving an ACK that matched a SYN-cookie, it was always delivered asynchronously to the accept queue. There was a chance that the listening endpoint would process a SYN from another client before the delivery happened, and the listening endpoint would not know yet that the queue was about to be full, once the delivery happened. Now, when an ACK matching a SYN-cookie is received, the new endpoint is created and moved to the accept queue synchronously, while holding the accept lock. Fixes #6545 PiperOrigin-RevId: 398107254
2021-09-20Support getsockname for packet socketsGhanan Gowripalan
Updates #6621 PiperOrigin-RevId: 397898852
2021-09-20Do not allow unbinding network protocolGhanan Gowripalan
Once a packet socket is bound to a network protocol, it cannot be unbound from that protocol; the network protocol binding may only be updated to a different network protocol. To comply with Linux. PiperOrigin-RevId: 397810878
2021-09-19Support IPV6_RECVPKTINFO on UDP socketsGhanan Gowripalan
PiperOrigin-RevId: 397631833
2021-09-17Allow rebinding packet socket protocolGhanan Gowripalan
...to change the network protocol a packet socket may receive packets from. This CL is a portion of an originally larger CL that was split with https://github.com/google/gvisor/commit/a8ad692fd36cbaf7f5a6b9af39d601053dbee338 being the dependent CL. That CL (accidentally) included the change in the endpoint's `afterLoad` method to take the required lock when accessing the endpoint's netProto field. That change should have been in this CL. The CL that made the change mentioned in the commit message is cl/396946187. PiperOrigin-RevId: 397412582
2021-09-16Allow creating packet socket bound to any protocolGhanan Gowripalan
...even protocols the stack is unaware of. While I am here, annotate checklocks on stack.packetEndpointList. PiperOrigin-RevId: 397226754
2021-09-16Rename packet_socket to packet_socket_dgramGhanan Gowripalan
...so that a later change can add a new packet_socket syscall test target that holds raw/dgram packet socket generic common tests. The current packet_socket syscall test target holds tests specific to dgram packet sockets. While I am here, remove the defines for the packet_socket_raw_test target as no code is guarded with `__linux__` in the target's sources. PiperOrigin-RevId: 397217761
2021-09-16Limit most file mmaps to the range of an int64.Jamie Liu
In the general case, files may have offsets between MaxInt64 and MaxUint64; in Linux pgoff is consistently represented by an unsigned long, and in gVisor the offset types in memmap.MappableRange are uint64. However, regular file mmap is constrained to int64 offsets (on 64-bit systems) by mm/mmap.c:file_mmap_size_max() => MAX_LFS_FILESIZE == LLONG_MAX. As a related fix, check for chunkStart overflow in fsutil.HostFileMapper; chunk offsets are uint64s, but as noted above some file types may use uint64 offsets beyond MaxInt64. Reported-by: syzbot+71342a1585aed97ed9f7@syzkaller.appspotmail.com PiperOrigin-RevId: 397136751
2021-09-16Don't allow binding to broadcast on ICMP socketsGhanan Gowripalan
...to match Linux behaviour. Fixes #5711. PiperOrigin-RevId: 397132671
2021-09-15[bind] Return EINVAL for under sized addressGhanan Gowripalan
...and EAFNOSUPPORT for unexpected address family. To comply with Linux. Updates #6021, #6575. PiperOrigin-RevId: 396893590
2021-09-14Compose raw IP with datagram-based endpointGhanan Gowripalan
A raw IP endpoint's write and socket option get/set path can use the datagram-based endpoint. This change extracts tests from UDP that may also run on Raw IP sockets. Updates #6565. Test: Raw IP + datagram-based socket syscall tests. PiperOrigin-RevId: 396729727
2021-09-14Use a shared method to get loopback indexGhanan Gowripalan
Code to get the loopback interface's index is scattered throughout the syscall tests. Implement the code once and use that in tests (where applicable). While I am here, trim the dependencies/includes for network namespace tests. PiperOrigin-RevId: 396718124
2021-09-14Explicitly bind endpoint to a NICGhanan Gowripalan
Previously, any time a datagram-based network endpoint (e.g. UDP) was bound, the bound NIC is always set based on the bound address (if specified). However, we should only consider the endpoint bound to an NIC if a NIC was explicitly bound to. If an endpoint has been bound to an address and attempts to send packets to an unconnected remote, the endpoint will default to sending packets through the bound address' NIC if not explicitly bound to a NIC. Updates #6565. PiperOrigin-RevId: 396712415
2021-09-14Don't use SOL_UDP when creating socketsGhanan Gowripalan
SOL_UDP is used when get/set-ing socket options to specify the socket level. When creating normal UDP sockets, the protocol need not be specified. When creating RAW IP sockets for UDP, use IPPROTO_UDP. PiperOrigin-RevId: 396675986
2021-09-13Accept packets destined to bound addressGhanan Gowripalan
...if bound to an address. We previously checked the source of a packet instead of the destination of a packet when bound to an address. PiperOrigin-RevId: 396497647
2021-09-13Separate IPv4 ToS & IPv6 TClass in dgram endpointGhanan Gowripalan
Setting the ToS for IPv4 packets (SOL_IP, IP_TOS) should not affect the Traffic Class of IPv6 packets (SOL_IPV6, IPV6_TCLASS). Also only return the ToS value XOR Traffic Class as a packet cannot be both an IPv4 and an IPv6 packet; It is invalid to return both the IPv4 ToS and IPv6 Traffic Class control messages when reading packets. Updates #6389. PiperOrigin-RevId: 396399096
2021-09-09Remove linux-compat loopback hacks from packet endpointGhanan Gowripalan
Previously, gVisor did not represent loopback devices as an ethernet device as Linux does. To maintain Linux API compatibility for packet sockets, a workaround was used to add an ethernet header if a link header was not already present in the packet buffer delivered to a packet endpoint. However, this workaround is a bug for non-ethernet based interfaces; not all links use an ethernet header (e.g. pure L3/TUN interfaces). As of 3b4bb947517d0d9010120aaa1c3989fd6abf278e, gVisor represents loopback devices as an ethernet-based device so this workaround can now be removed. BUG: https://fxbug.dev/81592 Updates #6530, #6531. PiperOrigin-RevId: 395819151
2021-09-01Support sending with packet socketsGhanan Gowripalan
...through the loopback interface, only. This change only supports sending on packet sockets through the loopback interface as the loopback interface is the only interface used in packet socket syscall tests - the other link endpoints are not excercised with the existing test infrastructure. Support for sending on packet sockets through the other interfaces will be added as needed. BUG: https://fxbug.dev/81592 PiperOrigin-RevId: 394368899
2021-09-01unix: handle a case when a buffer is overflowedAndrei Vagin
Reported-by: syzbot+1aab6800bd14829609b8@syzkaller.appspotmail.com PiperOrigin-RevId: 394279838
2021-08-31Remove splice-to/from-weird-files tests.Jamie Liu
These tests are permanently broken on Linux after 36e2c7421f02 "fs: don't allow splice read/write without explicit ops". PiperOrigin-RevId: 394161079
2021-08-30[syserr] Fix SIGBUS on syserr.FromErrorZach Koopmans
Fix syzcaller panic SIGBUS on error handling. Done by adding an interface, errors.GuestError, which errors can implement in order to be compared against each other. PiperOrigin-RevId: 393867554
2021-08-26fix tests in pty.ccgystemd
fixed and enabled SetForegroundProcessGroup and SetForegroundProcessGroupEmptyProcessGroup.
2021-08-24Merge pull request #6438 from gystemd:tcsetpgrp_SIGTTOUgVisor bot
PiperOrigin-RevId: 392774712
2021-08-24Fix uninitialized messages in MsgqueueTestFabricio Voznika
PiperOrigin-RevId: 392760305
2021-08-19Added a system call test for SetForegroundProcessGroupgystemd
-Added a test to check if the process in background is blocking SIGTTOU -Some minor formatting fixes
2021-08-17[op] Deflake SNMP Metric proc_net tests.Ayush Ranjan
Earlier the tests were checking for equality of system-wide metrics before and after some network related operations. That is inherently racy for native tests because depending on the testing infrastructure, multiple tests might run parallely hence trampling over each other's metrics. Tests should only compare metrics that are increasing in nature. The comparison should not be a hard comparison, instead a less-than/greater-than relation test. I have changed the checks and also removed tests for tcpCurrEstab metric which has "SYNTAX Gauge" and hence can not be tested reliably. PiperOrigin-RevId: 391460081
2021-08-17Merge pull request #6262 from sudo-sturbia:msgqueue/syscalls3gVisor bot
PiperOrigin-RevId: 391416650
2021-08-17added two system call tests for setForegroundProcessGroupgystemd
Test the correct sending of the SIGTTOU in setForegroundProcess
2021-08-17Implement stub for msgctl(2).Zyad A. Ali
Add support for msgctl and enable tests. Fixes #135
2021-08-17Add tests for msgctl(2).Zyad A. Ali
Updates #135
2021-08-16test/syscalls/proc_net: /proc/net/snmp can contain system-wide statisticsAndrei Vagin
This is a new kernel feature that are controlled by the net.core.mibs_allocation sysctl. PiperOrigin-RevId: 391215784
2021-08-12test/pipe: use futex() for sync with the signal handerAndrei Vagin
PiperOrigin-RevId: 390399815
2021-08-12Add support for TCP send buffer auto tuning.Nayana Bidari
Send buffer size in TCP indicates the amount of bytes available for the sender to transmit. This change will allow TCP to update the send buffer size when - TCP enters established state. - ACK is received. The auto tuning is disabled when the send buffer size is set with the SO_SNDBUF option. PiperOrigin-RevId: 390312274
2021-08-11Run packet socket tests on FuchsiaGhanan Gowripalan
+ Do not check for CAP_NET_RAW on Fuchsia Fuchsia does not support capabilities the same way Linux does. Instead emulate the check for CAP_NET_RAW by checking if a packet socket may be created. Bug: https://fxbug.dev/79016, https://fxbug.dev/81592 PiperOrigin-RevId: 390263666
2021-08-11Initial cgroupfs support for subcontainersRahat Mahmood
Allow creation and management of subcontainers through cgroupfs directory syscalls. Also add a mechanism to specify a default root container to start new jobs in. This implements the filesystem support for subcontainers, but doesn't implement hierarchical resource accounting or task migration. PiperOrigin-RevId: 390254870
2021-08-11Fix FSSupportsMap checkAdam Barth
Previously, this check always failed because we did not provide MAP_SHARED or MAP_PRIVATE. PiperOrigin-RevId: 390251086
2021-08-11Wrap test queues in Queue object on creation.Rahat Mahmood
PiperOrigin-RevId: 390245901
2021-08-11Fix LinkTest.OldnameDoesNotExistAdam Barth
Previous, this test was the same as OldnameIsEmpty. This CL makes the test check what happens if the old name does not exist. PiperOrigin-RevId: 390243070
2021-08-09Run raw IP socket syscall tests on FuchsiaGhanan Gowripalan
+ Do not check for CAP_NET_RAW on Fuchsia Fuchsia does not support capabilities the same way Linux does. Instead emulate the check for CAP_NET_RAW by checking if a raw IP sockets may be created. PiperOrigin-RevId: 389663218
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