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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
2020-05-01Port 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
2020-04-30Prefer 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
2020-04-29Add 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
2020-04-28Fix 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
2020-04-28Support 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
2020-04-27Import 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
2020-04-27Dump 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
2020-04-27Don't leak vfs.MountNamespace reference if kernel.TaskSet.NewTask fails.Jamie Liu
PiperOrigin-RevId: 308617610
2020-04-25Enable automated marshalling for signals and the arch package.Rahat Mahmood
PiperOrigin-RevId: 308472331
2020-04-24More descriptive error message for missing docker image.Eyal Soha
Tested: Ran a packetimpact test after `docker image rm` and examined the message. PiperOrigin-RevId: 308370603
2020-04-24VFS2: Get HelloWorld image tests to pass with VFS2Zach Koopmans
This change includes: - Modifications to loader_test.go to get TestCreateMountNamespace to pass with VFS2. - Changes necessary to get TestHelloWorld in image tests to pass with VFS2. This means runsc can run the hello-world container with docker on VSF2. Note: Containers that use sockets will not run with these changes. See "//test/image/...". Any tests here with sockets currently fail (which is all of them but HelloWorld). PiperOrigin-RevId: 308363072
2020-04-24Merge pull request #1707 from lubinszARM:pr_lazy_fpsimd_2gVisor bot
PiperOrigin-RevId: 308347744
2020-04-24Add ICMP6 param problem testEyal Soha
Tested: When run on Linux, a correct ICMPv6 response is received. On netstack, no ICMPv6 response is received. PiperOrigin-RevId: 308343113
2020-04-24Standardize all Docker images.Adin Scannell
This change moves all Docker images to a standard location, and abstracts the build process so that they can be maintained in an automated fashion. This also allows the images to be architecture-independent. All images will now be referred to by the test framework via the canonical `gvisor.dev/images/<name>`, where `<name>` is a function of the path within the source tree. In a subsequent change, continuous integration will be added so that the images will always be correct and available locally. In the end, using `bazel` for Docker containers is simply not possible. Given that we already have the need to use `make` with the base container (for Docker), we extend this approach to get more flexibility. This change also adds a self-documenting and powerful Makefile that is intended to replace the collection of scripts in scripts. Canonical (self-documenting) targets can be added here for targets that understand which images need to be loaded and/or built. PiperOrigin-RevId: 308322438
2020-04-24Port SCM Rights to VFS2.Dean Deng
Fixes #1477. PiperOrigin-RevId: 308317511
2020-04-24Do not copy tcpip.CancellableTimerGhanan Gowripalan
A CancellableTimer's AfterFunc timer instance creates a closure over the CancellableTimer's address. This closure makes a CancellableTimer unsafe to copy. No behaviour change, existing tests pass. PiperOrigin-RevId: 308306664
2020-04-24Plumb context.Context into kernfs.Inode.Open().Dean Deng
PiperOrigin-RevId: 308304793
2020-04-24Fixes for procfsFabricio Voznika
- Return ENOENT for /proc/[pid]/task if task is zoombied or terminated - Allow directory to be Seek() to the end - Construct synthetic files for /proc/[pid]/ns/* - Changed GenericDirectoryFD.Init to not register with FileDescription, otherwise other implementation cannot change behavior. Updates #1195,1193 PiperOrigin-RevId: 308294649
2020-04-24Move hostfs mount to Kernel struct.Dean Deng
This is needed to set up host fds passed through a Unix socket. Note that the host package depends on kernel, so we cannot set up the hostfs mount directly in Kernel.Init as we do for sockfs and pipefs. Also, adjust sockfs to make its setup look more like hostfs's and pipefs's. PiperOrigin-RevId: 308274053
2020-04-24Refactor syscall.Fstat calls in hostfs.Dean Deng
Just call syscall.Fstat directly each time mode/file owner are needed. This feels more natural than using i.getPermissions(). PiperOrigin-RevId: 308257405
2020-04-23Enable automated marshalling for mempolicy syscalls.Rahat Mahmood
PiperOrigin-RevId: 308170679
2020-04-23Port devpts to VFS2.Nicolas Lacasse
PiperOrigin-RevId: 308164359
2020-04-23Remove View.First() and View.RemoveFirst()Kevin Krakauer
These methods let users eaily break the VectorisedView abstraction, and allowed netstack to slip into pseudo-enforcement of the "all headers are in the first View" invariant. Removing them and replacing with PullUp(n) breaks this reliance and will make it easier to add iptables support and rework network buffer management. The new View.PullUp(n) method is low cost in the common case, when when all the headers fit in the first View. PiperOrigin-RevId: 308163542
2020-04-23Enable automated marshalling for epoll events.Rahat Mahmood
Ensure we use the correct architecture-specific defintion of epoll event, and use go-marshal for serialization. PiperOrigin-RevId: 308145677
2020-04-23Add vfs.MkdirOptions.ForSyntheticMountpoint.Jamie Liu
PiperOrigin-RevId: 308143529
2020-04-23Merge pull request #1819 from lubinszARM:pr_signal_2gVisor bot
PiperOrigin-RevId: 308100771
2020-04-23Simplify Docker test infrastructure.Adin Scannell
This change adds a layer of abstraction around the internal Docker APIs, and eliminates all direct dependencies on Dockerfiles in the infrastructure. A subsequent change will automated the generation of local images (with efficient caching). Note that this change drops the use of bazel container rules, as that experiment does not seem to be viable. PiperOrigin-RevId: 308095430
2020-04-23Factor fsimpl/gofer.host{Preadv,Pwritev} out of fsimpl/gofer.Jamie Liu
Also fix returning EOF when 0 bytes are read. PiperOrigin-RevId: 308089875
2020-04-22Move user home detection to its own library.Nicolas Lacasse
PiperOrigin-RevId: 307977689
2020-04-22Specify a memory file in platform.New().Andrei Vagin
PiperOrigin-RevId: 307941984
2020-04-22tcp: handle listen after shutdown properlyAndrei Vagin
Right now, sentry panics in this case: panic: close of nil channel goroutine 67 [running]: pkg/tcpip/transport/tcp/tcp.(*endpoint).listen(0xc0000ce000, 0x9, 0x0) pkg/tcpip/transport/tcp/endpoint.go:2208 +0x170 pkg/tcpip/transport/tcp/tcp.(*endpoint).Listen(0xc0000ce000, 0x9, 0xc0003a1ad0) pkg/tcpip/transport/tcp/endpoint.go:2179 +0x50 Fixes #2468 PiperOrigin-RevId: 307896725
2020-04-21Fix set/getsockopt in vfs2 override.Dean Deng
Updates #1476. PiperOrigin-RevId: 307726055
2020-04-21Update gofer.filesystem.BoundEndpointAt() to allow path resolution.Dean Deng
Even though BoundEndpointAt is not yet implemented for gofer fs, allow path resolution errors to be returned so that we can jump to tmpfs, where it is implemented. Updates #1476. PiperOrigin-RevId: 307718335
2020-04-21Misc VFS2 fixesFabricio Voznika
- Fix defer operation ordering in kernfs.Filesystem.AccessAt() - Add AT_NULL entry in proc/pid/auvx - Fix line padding in /proc/pid/maps - Fix linux_dirent serialization for getdents(2) - Remove file creation flags from vfs.FileDescription.statusFlags() Updates #1193, #1035 PiperOrigin-RevId: 307704159
2020-04-21Merge pull request #1818 from lubinszARM:pr_signal_1gVisor bot
PiperOrigin-RevId: 307680200
2020-04-21Remove filesystem structure from vfs.Dentry.Jamie Liu
This change: - Drastically simplifies the synchronization model: filesystem structure is both implementation-defined and implementation-synchronized. - Allows implementations of vfs.DentryImpl to use implementation-specific dentry types, reducing casts during path traversal. - Doesn't require dentries representing non-directory files to waste space on a map of children. - Allows dentry revalidation and mount lookup to be correctly ordered (fixed FIXME in fsimpl/gofer/filesystem.go). - Removes the need to have two separate maps in gofer.dentry (dentry.vfsd.children and dentry.negativeChildren) for positive and negative lookups respectively. //pkg/sentry/fsimpl/tmpfs/benchmark_test.go: name old time/op new time/op delta VFS2TmpfsStat/1-112 172ns ± 4% 165ns ± 3% -4.08% (p=0.002 n=9+9) VFS2TmpfsStat/2-112 199ns ± 3% 195ns ±10% ~ (p=0.132 n=8+9) VFS2TmpfsStat/3-112 230ns ± 2% 216ns ± 2% -6.15% (p=0.000 n=8+8) VFS2TmpfsStat/8-112 390ns ± 2% 358ns ± 4% -8.33% (p=0.000 n=9+8) VFS2TmpfsStat/64-112 2.20µs ± 3% 2.01µs ± 3% -8.48% (p=0.000 n=10+8) VFS2TmpfsStat/100-112 3.42µs ± 9% 3.08µs ± 2% -9.82% (p=0.000 n=9+8) VFS2TmpfsMountStat/1-112 278ns ± 1% 286ns ±15% ~ (p=0.712 n=8+10) VFS2TmpfsMountStat/2-112 311ns ± 4% 298ns ± 2% -4.27% (p=0.000 n=9+8) VFS2TmpfsMountStat/3-112 339ns ± 3% 330ns ± 9% ~ (p=0.070 n=8+9) VFS2TmpfsMountStat/8-112 503ns ± 3% 466ns ± 3% -7.38% (p=0.000 n=8+8) VFS2TmpfsMountStat/64-112 2.53µs ±16% 2.17µs ± 7% -14.19% (p=0.000 n=10+9) VFS2TmpfsMountStat/100-112 3.60µs ± 4% 3.30µs ± 8% -8.33% (p=0.001 n=8+9) Updates #1035 PiperOrigin-RevId: 307655892
2020-04-21Sentry metrics updates.Dave Bailey
Sentry metrics with nanoseconds units are labeled as such, and non-cumulative sentry metrics are supported. PiperOrigin-RevId: 307621080
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