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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
2020-04-24Merge pull request #2509 from prattmic:benchmark_docsgVisor bot
PiperOrigin-RevId: 308215754
2020-04-23Fix Layer merge and add unit testsEyal Soha
mergo was improperly merging nil and empty strings PiperOrigin-RevId: 308170862
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
2020-04-23Fix test output so that filenames have the correct path.Eyal Soha
Tested: Intentionally introduce an error and then run: blaze test --test_output=streamed //third_party/gvisor/test/packetimpact/tests:tcp_outside_the_window_linux_test PiperOrigin-RevId: 308114194
2020-04-23Add basic GitHub labeler workflow.Adin Scannell
This is the first automated GitHub actions workflow, and it simply applies labels to pull request in a best-effort fashion. PiperOrigin-RevId: 308112191
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
2020-04-23Disable nogo because it breaks Go 1.13Fabricio Voznika
Even though the default build option is to use 1.14, we want to be want to keep the ability to target different Go versions for testing and in case the new release has bugs. PiperOrigin-RevId: 308078876
2020-04-23Run failing packetimpact test and expect failure.Eyal Soha
This will make it easier to notice if a code change causes an existing test to pass. PiperOrigin-RevId: 308057978
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
2020-04-22Add GitHub pull request template.Adin Scannell
This just provides some sane reminders and ticks a box on the GitHub UI. This change also cleans up the issue template, as there is already an automatic link to the repository's security disclosure policy. PiperOrigin-RevId: 307868833
2020-04-22Remove unnecessary kokoro configurations.Adin Scannell
PiperOrigin-RevId: 307841689
2020-04-22Add comments about deepcopy in Layer.incoming()Eyal Soha
PiperOrigin-RevId: 307812340
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
2020-04-21Don't ignore override if it is longer than layerStatesgVisor bot
PiperOrigin-RevId: 307708653
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
2020-04-21Move to GitHub's new issue templates.Adin Scannell
This allows us to specify a richer configuration for the issue template, that effectively moves a lot of the "metadata" from the template itself to the main issue page. PiperOrigin-RevId: 307666509
2020-04-21benchmarks: use absolute bazel targetMichael Pratt
bazel run :benchmarks only works from the benchmarks directory. bazel run //benchmarks works from anywhere in the workspace. Also fix help commands, which should be a multiline code section.
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
2020-04-21Restore euid upon test finishKevin Krakauer
PiperOrigin-RevId: 307638329
2020-04-21Internal change.gVisor bot
PiperOrigin-RevId: 307622320
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
2020-04-21Automated rollback of changelist 307477185gVisor bot
PiperOrigin-RevId: 307598974
2020-04-20Add internal nogo analysis & checkescape tool.Adin Scannell
See tools/nogo/README.md. The checkescape tool is able to perform recursive escape analysis, using the actual generated binary to confirm the results produced by the compiler itself. As an initial use case, this replaces the manual escape analysis tests used for go_marshal, and validates that the CopyIn and CopyOut paths will not require any allocation or stack splits. Updates #2243 PiperOrigin-RevId: 307532986
2020-04-20Prevent race when reassigning CancellableTimerGhanan Gowripalan
Capture a timer's locker for each instance of a CancellableTimer so that reassigning a tcpip.CancellableTimer does not cause a data race. Reassigning a tcpip.CancellableTimer updates its underlying locker. When a timer fires, it does a read of the timer's locker variable to lock it. This read of the locker was not synchronized so a race existed where one goroutine may reassign the timer (updating the locker) and another handles the timer firing (attempts to lock the timer's locker). Test: tcpip_test.TestCancellableTimerReassignment PiperOrigin-RevId: 307499822
2020-04-20Add a functional vm_test for root_test.Adin Scannell
This change renames the tools/images directory to tools/vm for clarity, and adds a functional vm_test. Sharding is also added to the same test, and some documentation added around key flags & variables to describe how they work. Subsequent changes will add vm_tests for other cases, such as the runtime tests. PiperOrigin-RevId: 307492245
2020-04-20Merge pull request #2313 from kevinGC:firstngVisor bot
PiperOrigin-RevId: 307477185
2020-04-20Fix release.sh. git commands need to be run in git repo.Ting-Yu Wang
PiperOrigin-RevId: 307458938
2020-04-20Merge pull request #2060 from xiaobo55x:rseqgVisor bot
PiperOrigin-RevId: 307453436
2020-04-20Move runtime_tests.sh to align with other scripts.Adin Scannell
PiperOrigin-RevId: 307435879
2020-04-20Change lingering uses of "memfs" in fsimpl/tmpfs to "tmpfs".Jamie Liu
PiperOrigin-RevId: 307422746
2020-04-20Resolve issue with file mode for host fds.Dean Deng
Instead of plumbing error through kernfs.Inode.Mode, panic if err != nil. The errors that can result from an fstat syscall all indicate that something is fundamentally wrong, and panicking should be acceptable. PiperOrigin-RevId: 307406847
2020-04-19Don't accept segments outside the receive windowEyal Soha
Fixed to match RFC 793 page 69. Fixes #1607 PiperOrigin-RevId: 307334892
2020-04-19Convert tcp_user_timeout test from packetdrill to packetimpact.Eyal Soha
PiperOrigin-RevId: 307328289
2020-04-17Merge pull request #2235 from xiaobo55x:pcidgVisor bot
PiperOrigin-RevId: 307166482
2020-04-17Fix watchdog skipStack: the meaning was reversed.Adin Scannell
PiperOrigin-RevId: 307166317
2020-04-17prlimit: don't check credentials on selfKevin Krakauer
prlimit was erroneously comparing UIDs and GIDs when getting/setting a process' own limits. From the manpage: To set or get the resources of a process other than itself, the caller must have the CAP_SYS_RESOURCE capability, or the real, effective, and saved set user IDs of the target process must match the real user ID of the caller and the real, effective, and saved set group IDs of the target process must match the real group ID of the caller. PiperOrigin-RevId: 307127266
2020-04-17Support NDP DNS Search List optionGhanan Gowripalan
Inform the netstack integrator when the netstack receives an NDP Router Advertisement message with the NDP DNS Search List option with at least one domain name. The stack will not maintain any state related to the search list - the integrator is expected to maintain any required state and invalidate domain names after their lifetime expires, or refresh the lifetime when a new one is received for a known domain name. Test: - header_test.TestNDPDNSSearchListOption - header_test.TestNDPDNSSearchListOptionSerialize - header_test.TestNDPSearchListOptionDomainNameLabelInvalidSymbols - header_test.TestNDPOptionsIterCheck - stack_test.TestNDPDNSSearchListDispatch PiperOrigin-RevId: 307109375
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