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2020-05-05Support TCP zero window probes.Mithun Iyer
As per RFC 1122 4.2.2.17, when the remote advertizes zero receive window, the sender needs to probe for the window-size to become non-zero starting from the next retransmission interval. The TCP connection needs to be kept open as long as the remote is acknowledging the zero window probes. We reuse the retransmission timers to support this. Fixes #1644 PiperOrigin-RevId: 310021575
2020-05-05Internal change.gVisor bot
PiperOrigin-RevId: 310001058
2020-05-05Update vfs2 socket TODOs.Dean Deng
Three updates: - Mark all vfs2 socket syscalls as supported. - Use the same dev number and ino number generator for all types of sockets, unlike in VFS1. - Do not use host fd for hostinet metadata. Fixes #1476, #1478, #1484, 1485, #2017. PiperOrigin-RevId: 309994579
2020-05-05Update comments for synthetic gofer files in vfs2.Dean Deng
PiperOrigin-RevId: 309966538
2020-05-05Return correct name for imported host filesFabricio Voznika
Implement PrependPath() in host.filesystem to correctly format name for host files. Updates #1672 PiperOrigin-RevId: 309959135
2020-05-05Translate p9.NoUID/GID to OverflowUID/GID.Jamie Liu
p9.NoUID/GID (== uint32(-1) == auth.NoID) is not a valid auth.KUID/KGID; in particular, using it for file ownership causes capabilities to be ineffective since file capabilities require that the file's KUID and KGID are mapped into the capability holder's user namespace [1], and auth.NoID is not mapped into any user namespace. Map p9.NoUID/GID to a different, valid KUID/KGID; in the unlikely case that an application actually using the overflow KUID/KGID attempts an operation that is consequently permitted by client permission checks, the remote operation will still fail with EPERM. Since this changes the VFS2 gofer client to no longer ignore the invalid IDs entirely, this CL both permits and requires that we change synthetic mount point creation to use root credentials. [1] See fs.Inode.CheckCapability or vfs.GenericCheckPermissions. PiperOrigin-RevId: 309856455
2020-05-04Port eventfd to VFS2.Nicolas Lacasse
And move sys_timerfd.go to just timerfd.go for consistency. Updates #1475. PiperOrigin-RevId: 309835029
2020-05-04Internal change.gVisor bot
PiperOrigin-RevId: 309832671
2020-05-04Remove kernfs.Filesystem cast from GenericDirectoryFDFabricio Voznika
This allows for kerfs.Filesystem to be overridden by different implementations. Updates #1672 PiperOrigin-RevId: 309809321
2020-05-04Deflake //third_party/gvisor/test/syscalls:proc_test_nativeAndrei Vagin
There is the known issue of the linux procfs, that two consequent calls of readdir can return the same entry twice if between these calls one or more entries have been removed from this directory. PiperOrigin-RevId: 309803066
2020-05-04Internal change.gVisor bot
PiperOrigin-RevId: 309801320
2020-05-04Enable TestRunNonRoot on VFS2Fabricio Voznika
Also added back the default test dimension back which was dropped in a previous refactor. PiperOrigin-RevId: 309797327
2020-05-04Mount VSFS2 filesystem using root credentialsFabricio Voznika
PiperOrigin-RevId: 309787938
2020-05-04Merge pull request #2275 from nybidari:iptablesgVisor bot
PiperOrigin-RevId: 309783486
2020-05-04Add TTY support on VFS2 to runscFabricio Voznika
Updates #1623, #1487 PiperOrigin-RevId: 309777922
2020-05-04Fix flaky monotonic time.Adin Scannell
This change ensures that even platforms with some TSC issues (e.g. KVM), can get reliable monotonic time by applied a lower bound on each read. PiperOrigin-RevId: 309773801
2020-05-01Fix include type.Adin Scannell
PiperOrigin-RevId: 309506957
2020-05-01Run labeller only for non-forked pull requests.Adin Scannell
Otherwise the labeller will generate an error each time. PiperOrigin-RevId: 309505731
2020-05-01Support for connection tracking of TCP packets.Nayana Bidari
Connection tracking is used to track packets in prerouting and output hooks of iptables. The NAT rules modify the tuples in connections. The connection tracking code modifies the packets by looking at the modified tuples.
2020-05-01Regenerate SLAAC address on conflicts with the NICGhanan Gowripalan
If the NIC already has a generated SLAAC address, regenerate a new SLAAC address until one is generated that does not conflict with the NIC's existing addresses, up to a maximum of 10 attempts. This applies to both stable and temporary SLAAC addresses. Test: stack_test.TestMixedSLAACAddrConflictRegen PiperOrigin-RevId: 309495628
2020-05-01Automated rollback of changelist 308674219Kevin Krakauer
PiperOrigin-RevId: 309491861
2020-05-01Internal change.gVisor bot
PiperOrigin-RevId: 309467878
2020-05-01Port netstack, hostinet, and netlink sockets to VFS2.Dean Deng
All three follow the same pattern: 1. Refactor VFS1 sockets into socketOpsCommon, so that most of the methods can be shared with VFS2. 2. Create a FileDescriptionImpl with the corresponding socket operations, rewriting the few that cannot be shared with VFS1. 3. Set up a VFS2 socket provider that creates a socket by setting up a dentry in the global Kernel.socketMount and connecting it with a new FileDescription. This mostly completes the work for porting sockets to VFS2, and many syscall tests can be enabled as a result. There are several networking-related syscall tests that are still not passing: 1. net gofer tests 2. socketpair gofer tests 2. sendfile tests (splice is not implemented in VFS2 yet) Updates #1478, #1484, #1485 PiperOrigin-RevId: 309457331
2020-04-30Enable FIFO QDisc by default in runsc.Bhasker Hariharan
Updates #231 PiperOrigin-RevId: 309339316
2020-04-30FIFO QDisc implementationBhasker Hariharan
Updates #231 PiperOrigin-RevId: 309323808
2020-04-30Add gofer.InternalFilesystemOptions.LeakConnection.Jamie Liu
PiperOrigin-RevId: 309317605
2020-04-30Implement waiter.Waitable methods on VFS2 host inodes.Nicolas Lacasse
This fixes bash in Ubuntu. Updates #1672. PiperOrigin-RevId: 309298252
2020-04-30Allow to run kvm syscall tests on the RBE clusterAndrei Vagin
PiperOrigin-RevId: 309265978
2020-04-30Prefer temporary addressesGhanan Gowripalan
Implement rule 7 of Source Address Selection RFC 6724 section 5. This makes temporary (short-lived) addresses preferred over non-temporary addresses when earlier rules are equal. Test: stack_test.TestIPv6SourceAddressSelectionScopeAndSameAddress PiperOrigin-RevId: 309250975
2020-04-30Fix proc net bugs in VFS2.Dean Deng
The /proc/net/udp header was missing, and /proc/sys/net was set up as /proc/sys/net/net. Discovered while trying to run networking tests for VFS2. PiperOrigin-RevId: 309243758
2020-04-30Make tcp_close_wait_ack_test more accurateZeling Feng
Previously the test used an out-dated window size which is advertised during the handshake to generate testing packets, but the window size has changed since the handshake; currently it is using the most recent one which is advertised in DUT's ACK to our FIN packet to generate the testing outside-the-window packets. PiperOrigin-RevId: 309222921
2020-04-30make_repository.sh has to print only the repo path on stdoutAndrei Vagin
PiperOrigin-RevId: 309176385
2020-04-29Add read/write timeouts for VFS2 socket files.Dean Deng
Updates #1476 PiperOrigin-RevId: 309098590
2020-04-29iptables: don't pollute logsKevin Krakauer
The netfilter package uses logs to make debugging the (de)serialization of structs easier. This generates a lot of (usually irrelevant) logs. Logging is now hidden behind a debug flag. PiperOrigin-RevId: 309087115
2020-04-29Merge pull request #2487 from moricho:fix/bindmountgVisor bot
PiperOrigin-RevId: 309082540
2020-04-28Fix Unix socket permissions.Dean Deng
Enforce write permission checks in BoundEndpointAt, which corresponds to the permission checks in Linux (net/unix/af_unix.c:unix_find_other). Also, create bound socket files with the correct permissions in VFS2. Fixes #2324. PiperOrigin-RevId: 308949084
2020-04-28Internal change.gVisor bot
PiperOrigin-RevId: 308940886
2020-04-28Deduplicate unix socket Release() method.Dean Deng
PiperOrigin-RevId: 308932254
2020-04-28Support IPv6 Privacy Extensions for SLAACGhanan Gowripalan
Support generating temporary (short-lived) IPv6 SLAAC addresses to address privacy concerns outlined in RFC 4941. Tests: - stack_test.TestAutoGenTempAddr - stack_test.TestNoAutoGenTempAddrForLinkLocal - stack_test.TestAutoGenTempAddrRegen - stack_test.TestAutoGenTempAddrRegenTimerUpdates - stack_test.TestNoAutoGenTempAddrWithoutStableAddr - stack_test.TestAutoGenAddrInResponseToDADConflicts PiperOrigin-RevId: 308915566
2020-04-28Use existing bazeldefs with top-level BUILD file.Adin Scannell
PiperOrigin-RevId: 308901116
2020-04-28Don't unlink named pipes in pipe test.Jamie Liu
TempPath's destructor runs at the end of the named pipe creation functions, deleting the named pipe. If the named pipe is backed by a "non-virtual" filesystem (!fs.Inode.IsVirtual()), this causes the following save attempt to fail because there are FDs holding the deleted named pipe open. PiperOrigin-RevId: 308861999
2020-04-28Merge pull request #2558 from prattmic:forward_signalgVisor bot
PiperOrigin-RevId: 308829800
2020-04-28Support pipes and sockets in VFS2 gofer fs.Dean Deng
Named pipes and sockets can be represented in two ways in gofer fs: 1. As a file on the remote filesystem. In this case, all file operations are passed through 9p. 2. As a synthetic file that is internal to the sandbox. In this case, the dentry stores an endpoint or VFSPipe for sockets and pipes respectively, which replaces interactions with the remote fs through the gofer. In gofer.filesystem.MknodAt, we attempt to call mknod(2) through 9p, and if it fails, fall back to the synthetic version. Updates #1200. PiperOrigin-RevId: 308828161
2020-04-27Merge pull request #2544 from prattmic:runsc_do_cleanupgVisor bot
PiperOrigin-RevId: 308727526
2020-04-27Import host sockets.Dean Deng
The FileDescription implementation for hostfs sockets uses the standard Unix socket implementation (unix.SocketVFS2), but is also tied to a hostfs dentry. Updates #1672, #1476 PiperOrigin-RevId: 308716426
2020-04-27Reduce flakiness in tcp_test.Bhasker Hariharan
Poll for metric updates as immediately trying to read them can sometimes be flaky if due to goroutine scheduling the check happens before the sender has got a chance to update the corresponding sent metric. PiperOrigin-RevId: 308712817
2020-04-27Merge pull request #2557 from cmingxu:mastergVisor bot
PiperOrigin-RevId: 308706483
2020-04-27runsc: extend do network cleanupMichael Pratt
Previously we unconditionally failed to cleanup the networking files (hostname, resolve.conf, hosts), and failed to cleanup the netns, etc on partial setup failure. We can drop the iptables commands from cleanup, as the routes automatically go away when the device is deleted. Those commands were failing previously. Forward signals to the container, allowing it to exit normally when a signal is received, and then for runsc to run the cleanup. This doesn't cover cleanup when runsc is signalled before the container start, it covers the most common case. Fixes #2539 Fixes #2540
2020-04-27Dump stack for stuck start and stuck watchdogFabricio Voznika
The meaning for skipDump was reversed, but not all callers were updated. Change the meaning once again to forceDump, so that the period between stack dump is respected from all callers. PiperOrigin-RevId: 308674373
2020-04-27Automated rollback of changelist 308163542gVisor bot
PiperOrigin-RevId: 308674219
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