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2019-07-31Flipcall refinements.Jamie Liu
Note that some of these changes affect the protocol in backward-incompatible ways. - Replace use of "initially-active" and "initially-inactive" with "client" and "server" respectively for clarity. - Fix a race condition involving Endpoint.Shutdown() by repeatedly invoking FUTEX_WAKE until it is confirmed that no local thread is blocked in FUTEX_WAIT. - Drop flipcall.ControlMode. PiperOrigin-RevId: 260981382
2019-07-31Initialize kernel.unimplementedSyscallEmitter with a sync.Once.Nicolas Lacasse
This is initialized lazily on the first unimplemented syscall. Without the sync.Once, this is racy. PiperOrigin-RevId: 260971758
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
2019-07-30Cache pages in CachingInodeOperations.Read when memory evictions are delayed.Jamie Liu
PiperOrigin-RevId: 260851452
2019-07-30ext: Migrate from using fileReader custom interface to using io.Reader.Ayush Ranjan
It gets rid of holding state of the io.Reader offset (which is anyways held by the vfs.FileDescriptor struct. It is also odd using a io.Reader becuase we using io.ReaderAt to interact with the device. So making a io.ReaderAt wrapper makes more sense. Most importantly, it gets rid of the complexity of extracting the file reader from a regular file implementation and then using it. Now we can just use the regular file implementation as a reader which is more intuitive. PiperOrigin-RevId: 260846927
2019-07-30ext: block map file reader implementation.Ayush Ranjan
Also adds stress tests for block map reader and intensifies extent reader tests. PiperOrigin-RevId: 260838177
2019-07-30Pass ProtocolAddress instead of its fieldsTamir Duberstein
PiperOrigin-RevId: 260803517
2019-07-30Merge pull request #607 from DarcySail:mastergVisor bot
PiperOrigin-RevId: 260783254
2019-07-30Add feature to launch Sentry from an open host FD.Zach Koopmans
Adds feature to launch from an open host FD instead of a binary_path. The FD should point to a valid executable and most likely be statically compiled. If the executable is not statically compiled, the loader will search along the interpreter paths, which must be able to be resolved in the Sandbox's file system or start will fail. PiperOrigin-RevId: 260756825
2019-07-30Change syscall.POLL to syscall.PPOLL.Haibo Xu
syscall.POLL is not supported on arm64, using syscall.PPOLL to support both the x86 and arm64. refs #63 Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I2c81a063d3ec4e7e6b38fe62f17a0924977f505e COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/543 from xiaobo55x:master ba598263fd3748d1addd48e4194080aa12085164 PiperOrigin-RevId: 260752049
2019-07-29Migrate from using io.ReadSeeker to io.ReaderAt.Ayush Ranjan
This provides the following benefits: - We can now use pkg/fd package which does not take ownership of the file descriptor. So it does not close the fd when garbage collected. This reduces scope of errors from unexpected garbage collection of io.File. - It enforces the offset parameter in every read call. It does not affect the fd offset nor is it affected by it. Hence reducing scope of error of using stale offsets when reading. - We do not need to serialize the usage of any global file descriptor anymore. So this drops the mutual exclusion req hence reducing complexity and congestion. PiperOrigin-RevId: 260635174
2019-07-30Combine multiple epoll events copiesHang Su
Allocate a larger memory buffer and combine multiple copies into one copy, to reduce the number of copies from kernel memory to user memory. Signed-off-by: Hang Su <darcy.sh@antfin.com>
2019-07-29ext: extent reader implementation.Ayush Ranjan
PiperOrigin-RevId: 260629559
2019-07-29ext: inode implementations.Ayush Ranjan
PiperOrigin-RevId: 260624470
2019-07-29Use x/sys/unix for sentry/host interaction; abi is for guest/sentry.Christopher Koch
PiperOrigin-RevId: 260613864
2019-07-29Rate limit the unimplemented syscall event handler.Nicolas Lacasse
This introduces two new types of Emitters: 1. MultiEmitter, which will forward events to other registered Emitters, and 2. RateLimitedEmitter, which will forward events to a wrapped Emitter, subject to given rate limits. The methods in the eventchannel package itself act like a multiEmitter, but is not actually an Emitter. Now we have a DefaultEmitter, and the methods in eventchannel simply forward calls to the DefaultEmitter. The unimplemented syscall handler now uses a RateLimetedEmitter that wraps the DefaultEmitter. PiperOrigin-RevId: 260612770
2019-07-26Merge pull request #452 from zhangningdlut:chris_test_pidnsgVisor bot
PiperOrigin-RevId: 260220279
2019-07-25Automated rollback of changelist 255679453Fabricio Voznika
PiperOrigin-RevId: 260047477
2019-07-24ext: filesystem boilerplate code.Ayush Ranjan
PiperOrigin-RevId: 259865366
2019-07-24ext: Add tests for root directory inode.Ayush Ranjan
PiperOrigin-RevId: 259856442
2019-07-24ext: testing environment setup with VFS2 support.Ayush Ranjan
PiperOrigin-RevId: 259835948
2019-07-24Add support for a subnet prefix length on interface network addressesChris Kuiper
This allows the user code to add a network address with a subnet prefix length. The prefix length value is stored in the network endpoint and provided back to the user in the ProtocolAddress type. PiperOrigin-RevId: 259807693
2019-07-24Use different pidns among different containerschris.zn
The different containers in a sandbox used only one pid namespace before. This results in that a container can see the processes in another container in the same sandbox. This patch use different pid namespace for different containers. Signed-off-by: chris.zn <chris.zn@antfin.com>
2019-07-23ext: Inode creation logic.Ayush Ranjan
PiperOrigin-RevId: 259666476
2019-07-23ext: Add ext2 and ext3 tiny images.Ayush Ranjan
PiperOrigin-RevId: 259657917
2019-07-23ext: Added extent tree building logic.Ayush Ranjan
PiperOrigin-RevId: 259628657
2019-07-23Give each container a distinct MountNamespace.Nicolas Lacasse
This keeps all container filesystem completely separate from eachother (including from the root container filesystem), and allows us to get rid of the "__runsc_containers__" directory. It also simplifies container startup/teardown as we don't have to muck around in the root container's filesystem. PiperOrigin-RevId: 259613346
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
2019-07-22Fix up and add some iptables ABI.Kevin Krakauer
PiperOrigin-RevId: 259437060
2019-07-22Merge pull request #571 from lubinszARM:pr_loadergVisor bot
PiperOrigin-RevId: 259427074
2019-07-22kvm: fix race between machine.Put and machine.GetAndrei Vagin
m.available.Signal() has to be called under m.mu.RLock, otherwise it can race with machine.Get: m.Get | m.Put ------------------------------------- m.mu.Lock() | Seatching available vcpu| | m.available.Signal() m.available.Wait | PiperOrigin-RevId: 259394051
2019-07-22Fix struct statx field alignment.Jamie Liu
PiperOrigin-RevId: 259376740
2019-07-21Add ARM64 support to pkg/sentry/loaderBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
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
2019-07-18Sentry virtual filesystem, v2Jamie Liu
Major differences from the current ("v1") sentry VFS: - Path resolution is Filesystem-driven (FilesystemImpl methods call vfs.ResolvingPath methods) rather than VFS-driven (fs package owns a Dirent tree and calls fs.InodeOperations methods to populate it). This drastically improves performance, primarily by reducing overhead from inefficient synchronization and indirection. It also makes it possible to implement remote filesystem protocols that translate FS system calls into single RPCs, rather than having to make (at least) one RPC per path component, significantly reducing the latency of remote filesystems (especially during cold starts and for uncacheable shared filesystems). - Mounts are correctly represented as a separate check based on contextual state (current mount) rather than direct replacement in a fs.Dirent tree. This makes it possible to support (non-recursive) bind mounts and mount namespaces. Included in this CL is fsimpl/memfs, an incomplete in-memory filesystem that exists primarily to demonstrate intended filesystem implementation patterns and for benchmarking: BenchmarkVFS1TmpfsStat/1-6 3000000 497 ns/op BenchmarkVFS1TmpfsStat/2-6 2000000 676 ns/op BenchmarkVFS1TmpfsStat/3-6 2000000 904 ns/op BenchmarkVFS1TmpfsStat/8-6 1000000 1944 ns/op BenchmarkVFS1TmpfsStat/64-6 100000 14067 ns/op BenchmarkVFS1TmpfsStat/100-6 50000 21700 ns/op BenchmarkVFS2MemfsStat/1-6 10000000 197 ns/op BenchmarkVFS2MemfsStat/2-6 5000000 233 ns/op BenchmarkVFS2MemfsStat/3-6 5000000 268 ns/op BenchmarkVFS2MemfsStat/8-6 3000000 477 ns/op BenchmarkVFS2MemfsStat/64-6 500000 2592 ns/op BenchmarkVFS2MemfsStat/100-6 300000 4045 ns/op BenchmarkVFS1TmpfsMountStat/1-6 2000000 679 ns/op BenchmarkVFS1TmpfsMountStat/2-6 2000000 912 ns/op BenchmarkVFS1TmpfsMountStat/3-6 1000000 1113 ns/op BenchmarkVFS1TmpfsMountStat/8-6 1000000 2118 ns/op BenchmarkVFS1TmpfsMountStat/64-6 100000 14251 ns/op BenchmarkVFS1TmpfsMountStat/100-6 100000 22397 ns/op BenchmarkVFS2MemfsMountStat/1-6 5000000 317 ns/op BenchmarkVFS2MemfsMountStat/2-6 5000000 361 ns/op BenchmarkVFS2MemfsMountStat/3-6 5000000 387 ns/op BenchmarkVFS2MemfsMountStat/8-6 3000000 582 ns/op BenchmarkVFS2MemfsMountStat/64-6 500000 2699 ns/op BenchmarkVFS2MemfsMountStat/100-6 300000 4133 ns/op From this we can infer that, on this machine: - Constant cost for tmpfs stat() is ~160ns in VFS2 and ~280ns in VFS1. - Per-path-component cost is ~35ns in VFS2 and ~215ns in VFS1, a difference of about 6x. - The cost of crossing a mount boundary is about 80ns in VFS2 (MemfsMountStat/1 does approximately the same amount of work as MemfsStat/2, except that it also crosses a mount boundary). This is an inescapable cost of the separate mount lookup needed to support bind mounts and mount namespaces. PiperOrigin-RevId: 258853946
2019-07-17sys_time: Wrap comments to 80 columnsAdrien Leravat
2019-07-17Take copyMu in RevalidateMichael Pratt
copyMu is required to read child.overlay.upper. PiperOrigin-RevId: 258662209
2019-07-17Separate O_DSYNC and O_SYNC.Jamie Liu
PiperOrigin-RevId: 258657913
2019-07-17ext: disklayout: extents support.Ayush Ranjan
PiperOrigin-RevId: 258657776
2019-07-17ext: Filesystem init implementation.Ayush Ranjan
PiperOrigin-RevId: 258645957
2019-07-17Merge pull request #355 from zhuangel:mastergVisor bot
PiperOrigin-RevId: 258643966
2019-07-17Fix race in FDTable.GetFDs().Bhasker Hariharan
PiperOrigin-RevId: 258635459
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
2019-07-16Merge pull request #474 from zhuangel:proctasksgVisor bot
PiperOrigin-RevId: 258479216
2019-07-16Internal change.gVisor bot
PiperOrigin-RevId: 258424489
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