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2020-08-04Use 1 fragmentation component per IP stackGhanan Gowripalan
This will help manage memory consumption by IP reassembly when receiving IP fragments on multiple network endpoints. Previously, each endpoint would cap memory consumption at 4MB, but with this change, each IP stack will cap memory consumption at 4MB. No behaviour changes. PiperOrigin-RevId: 324913904
2020-08-04Add reference counting utility to VFS2.Dean Deng
The utility has several differences from the VFS1 equivalent: - There are no weak references, which have a significant overhead - In order to print useful debug messages with the type of the reference- counted object, we use a generic Refs object with the owner type as a template parameter. In vfs1, this was accomplished by storing a type name and caller stack directly in the ref count (as in vfs1), which increases the struct size by 6x. (Note that the caller stack was needed because fs types like Dirent were shared by all fs implementations; in vfs2, each impl has its own data structures, so this is no longer necessary.) As an example, the utility is added to tmpfs.inode. Updates #1486. PiperOrigin-RevId: 324906582
2020-08-04Internal change.gVisor bot
PiperOrigin-RevId: 324826968
2020-08-04Internal change.gVisor bot
PiperOrigin-RevId: 324819246
2020-08-03Add callbacks to support lazy loading/restoring thread statesAndrei Vagin
PiperOrigin-RevId: 324748508
2020-08-03[vfs2] Implement /sys/devices/system/cpu/cpuX.Ayush Ranjan
Fixes #3364 PiperOrigin-RevId: 324724614
2020-08-03Internal change.gVisor bot
PiperOrigin-RevId: 324695672
2020-08-03Remove old TODO.Dean Deng
Fixes #2920. PiperOrigin-RevId: 324695118
2020-08-03Plumbing context.Context to DecRef() and Release().Nayana Bidari
context is passed to DecRef() and Release() which is needed for SO_LINGER implementation. PiperOrigin-RevId: 324672584
2020-08-03Merge pull request #3460 from zhlhahaha:1927gVisor bot
PiperOrigin-RevId: 324658881
2020-08-03Add inotify events for fallocate and tests for fallocate/sendfile.Dean Deng
Updates #1479, #2923. PiperOrigin-RevId: 324658826
2020-08-03AARCH64:fix variable name collision with register nameHoward Zhang
The variable name is g which is collision with the reserved name for R28. This leads to bazel build failure on ARM with following information: (register+register) not supported on this architecture rename it from g to ptr (referenced from golang source code) Signed-off-by: Howard Zhang <howard.zhang@arm.com>
2020-07-31Merge pull request #3300 from lubinszARM:pr_fpsimd_usrgVisor bot
PiperOrigin-RevId: 324309862
2020-07-31Support fragments from different sourcesGhanan Gowripalan
Prevent fragments with different source-destination pairs from conflicting with each other. Test: - ipv6_test.TestReceiveIPv6Fragments - ipv4_test.TestReceiveIPv6Fragments PiperOrigin-RevId: 324283246
2020-07-31Merge pull request #3348 from kevinGC:so-orig-dstgVisor bot
PiperOrigin-RevId: 324279280
2020-07-31Internal change.gVisor bot
PiperOrigin-RevId: 324259991
2020-07-31iptables: support SO_ORIGINAL_DSTKevin Krakauer
Envoy (#170) uses this to get the original destination of redirected packets.
2020-07-31Clean up vfs2 fallocate.Dean Deng
Move to setstat.go and add a FileDescription wrapper method. PiperOrigin-RevId: 324165277
2020-07-30Fix TCP CurrentConnected counter updates.Mithun Iyer
CurrentConnected counter is incorrectly decremented on close of an endpoint which is still not connected. Fixes #3443 PiperOrigin-RevId: 324155171
2020-07-30Merge pull request #3448 from lubinszARM:pr_tls_testsgVisor bot
PiperOrigin-RevId: 324127810
2020-07-30Merge pull request #3028 from lubinszARM:pr_kvm_hello1gVisor bot
PiperOrigin-RevId: 324125938
2020-07-30Merge pull request #3179 from jinmouil:fuse_initgVisor bot
PiperOrigin-RevId: 324100220
2020-07-30Revert change to default buffer size.Bhasker Hariharan
In https://github.com/google/gvisor/commit/ca6bded95dbce07f9683904b4b768dfc2d4a09b2 we reduced the default buffer size to 32KB. This mostly works fine except at high throughput where we hit zero window very quickly and the TCP receive buffer moderation is not able to grow the window. This can be seen in the benchmarks where with a 32KB buffer and 100 connections downloading a 10MB file we get about 30 requests/s vs the 1MB buffer gives us about 53 requests/s. A proper fix requires a few changes to when we send a zero window as well as when we decide to send a zero window update. Today we consider available space below 1MSS as zero and send an update when it crosses 1MSS of available space. This is way too low and results in the window staying very small once we hit a zero window condition as we keep sending updates with size barely over 1MSS. Linux and BSD are smarter about this and use different thresholds. We should separately update our logic to match linux or BSD so that we don't send window updates that are really tiny or wait until we drop below 1MSS to advertise a zero window. PiperOrigin-RevId: 324087019
2020-07-30Enforce fragment block size and validate argsGhanan Gowripalan
Allow configuring fragmentation.Fragmentation with a fragment block size which will be enforced when processing fragments. Also validate arguments when processing fragments. Test: - fragmentation.TestErrors - ipv6_test.TestReceiveIPv6Fragments - ipv4_test.TestReceiveIPv6Fragments PiperOrigin-RevId: 324081521
2020-07-30Implement neighbor unreachability detection for ARP and NDP.Sam Balana
This change implements the Neighbor Unreachability Detection (NUD) state machine, as per RFC 4861 [1]. The state machine operates on a single neighbor in the local network. This requires the state machine to be implemented on each entry of the neighbor table. This change also adds, but does not expose, several APIs. The first API is for performing basic operations on the neighbor table: - Create a static entry - List all entries - Delete all entries - Remove an entry by address The second API is used for changing the NUD protocol constants on a per-NIC basis to allow Neighbor Discovery to operate over links with widely varying performance characteristics. See [RFC 4861 Section 10][2] for the list of constants. Finally, the last API is for allowing users to subscribe to NUD state changes. See [RFC 4861 Appendix C][3] for the list of edges. [1]: https://tools.ietf.org/html/rfc4861 [2]: https://tools.ietf.org/html/rfc4861#section-10 [3]: https://tools.ietf.org/html/rfc4861#appendix-C Tests: pkg/tcpip/stack:stack_test - TestNeighborCacheAddStaticEntryThenOverflow - TestNeighborCacheClear - TestNeighborCacheClearThenOverflow - TestNeighborCacheConcurrent - TestNeighborCacheDuplicateStaticEntryWithDifferentLinkAddress - TestNeighborCacheDuplicateStaticEntryWithSameLinkAddress - TestNeighborCacheEntry - TestNeighborCacheEntryNoLinkAddress - TestNeighborCacheGetConfig - TestNeighborCacheKeepFrequentlyUsed - TestNeighborCacheNotifiesWaker - TestNeighborCacheOverflow - TestNeighborCacheOverwriteWithStaticEntryThenOverflow - TestNeighborCacheRemoveEntry - TestNeighborCacheRemoveEntryThenOverflow - TestNeighborCacheRemoveStaticEntry - TestNeighborCacheRemoveStaticEntryThenOverflow - TestNeighborCacheRemoveWaker - TestNeighborCacheReplace - TestNeighborCacheResolutionFailed - TestNeighborCacheResolutionTimeout - TestNeighborCacheSetConfig - TestNeighborCacheStaticResolution - TestEntryAddsAndClearsWakers - TestEntryDelayToProbe - TestEntryDelayToReachableWhenSolicitedOverrideConfirmation - TestEntryDelayToReachableWhenUpperLevelConfirmation - TestEntryDelayToStaleWhenConfirmationWithDifferentAddress - TestEntryDelayToStaleWhenProbeWithDifferentAddress - TestEntryFailedGetsDeleted - TestEntryIncompleteToFailed - TestEntryIncompleteToIncompleteDoesNotChangeUpdatedAt - TestEntryIncompleteToReachable - TestEntryIncompleteToReachableWithRouterFlag - TestEntryIncompleteToStale - TestEntryInitiallyUnknown - TestEntryProbeToFailed - TestEntryProbeToReachableWhenSolicitedConfirmationWithSameAddress - TestEntryProbeToReachableWhenSolicitedOverrideConfirmation - TestEntryProbeToStaleWhenConfirmationWithDifferentAddress - TestEntryProbeToStaleWhenProbeWithDifferentAddress - TestEntryReachableToStaleWhenConfirmationWithDifferentAddress - TestEntryReachableToStaleWhenConfirmationWithDifferentAddressAndOverride - TestEntryReachableToStaleWhenProbeWithDifferentAddress - TestEntryReachableToStaleWhenTimeout - TestEntryStaleToDelay - TestEntryStaleToReachableWhenSolicitedOverrideConfirmation - TestEntryStaleToStaleWhenOverrideConfirmation - TestEntryStaleToStaleWhenProbeUpdateAddress - TestEntryStaysDelayWhenOverrideConfirmationWithSameAddress - TestEntryStaysProbeWhenOverrideConfirmationWithSameAddress - TestEntryStaysReachableWhenConfirmationWithRouterFlag - TestEntryStaysReachableWhenProbeWithSameAddress - TestEntryStaysStaleWhenProbeWithSameAddress - TestEntryUnknownToIncomplete - TestEntryUnknownToStale - TestEntryUnknownToUnknownWhenConfirmationWithUnknownAddress pkg/tcpip/stack:stack_x_test - TestDefaultNUDConfigurations - TestNUDConfigurationFailsForNotSupported - TestNUDConfigurationsBaseReachableTime - TestNUDConfigurationsDelayFirstProbeTime - TestNUDConfigurationsMaxMulticastProbes - TestNUDConfigurationsMaxRandomFactor - TestNUDConfigurationsMaxUnicastProbes - TestNUDConfigurationsMinRandomFactor - TestNUDConfigurationsRetransmitTimer - TestNUDConfigurationsUnreachableTime - TestNUDStateReachableTime - TestNUDStateRecomputeReachableTime - TestSetNUDConfigurationFailsForBadNICID - TestSetNUDConfigurationFailsForNotSupported [1]: https://tools.ietf.org/html/rfc4861 [2]: https://tools.ietf.org/html/rfc4861#section-10 [3]: https://tools.ietf.org/html/rfc4861#appendix-C Updates #1889 Updates #1894 Updates #1895 Updates #1947 Updates #1948 Updates #1949 Updates #1950 PiperOrigin-RevId: 324070795
2020-07-30Use brodcast MAC for broadcast IPv4 packetsGhanan Gowripalan
When sending packets to a known network's broadcast address, use the broadcast MAC address. Test: - stack_test.TestOutgoingSubnetBroadcast - udp_test.TestOutgoingSubnetBroadcast PiperOrigin-RevId: 324062407
2020-07-30Have dockerutil.Wait* respect the context deadlineKevin Krakauer
PiperOrigin-RevId: 324044634
2020-07-30Fix SETOWN_EX return value.Dean Deng
Return on success should be 0, not size of the struct copied out. PiperOrigin-RevId: 324029193
2020-07-30add usr-tls test cases for Arm64Bin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-29Add FUSE_INITJinmou Li
This change allows the sentry to send FUSE_INIT request and process the reply. It adds the corresponding structs, employs the fuse device to send and read the message, and stores the results of negotiation in corresponding places (inside connection struct). It adds a CallAsync() function to the FUSE connection interface: - like Call(), but it's for requests that do not expect immediate response (init, release, interrupt etc.) - will block if the connection hasn't initialized, which is the same for Call()
2020-07-29Force registration for EPOLLHUP, not EPOLLRDHUP, in vfs2's epoll.Jamie Liu
Compare Linux's fs/eventpoll.c:do_epoll_ctl(). I don't know where EPOLLRDHUP came from. PiperOrigin-RevId: 323874419
2020-07-29load/store user fpsimd on Arm64Bin Lu
full context switch: add fpsimd load/store support to container application. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-28Redirect TODO to GitHub issuesFabricio Voznika
PiperOrigin-RevId: 323715260
2020-07-28ip6tables testingKevin Krakauer
We skip gVisor tests for now, as ip6tables aren't yet implemented.
2020-07-27Fix strace for epoll event arrays.Jamie Liu
PiperOrigin-RevId: 323491461
2020-07-27Merge pull request #3201 from lubinszARM:pr_sys64_2gVisor bot
PiperOrigin-RevId: 323456118
2020-07-27Merge pull request #3299 from lubinszARM:pr_asidgVisor bot
PiperOrigin-RevId: 323455097
2020-07-27Add ability to send unicast ARP requests and Neighbor SolicitationsSam Balana
The previous implementation of LinkAddressRequest only supported sending broadcast ARP requests and multicast Neighbor Solicitations. The ability to send these packets as unicast is required for Neighbor Unreachability Detection. Tests: pkg/tcpip/network/arp:arp_test - TestLinkAddressRequest pkg/tcpip/network/ipv6:ipv6_test - TestLinkAddressRequest Updates #1889 Updates #1894 Updates #1895 Updates #1947 Updates #1948 Updates #1949 Updates #1950 PiperOrigin-RevId: 323451569
2020-07-27Fix memory accounting in TCP pending segment queue.Bhasker Hariharan
TCP now tracks the overhead of the segment structure itself in it's out-of-order queue (pending). This is required to ensure that a malicious sender sending 1 byte out-of-order segments cannot queue like 1000's of segments which bloat up memory usage. We also reduce the default receive window to 32KB. With TCP moderation there is no need to keep this window at 1MB which means that for new connections the default out-of-order queue will be small unless the application actually reads the data that is being sent. This prevents a sender from just maliciously filling up pending buf with lots of tiny out-of-order segments. PiperOrigin-RevId: 323450913
2020-07-27Merge pull request #2958 from lubinszARM:pr_vfs2_1gVisor bot
PiperOrigin-RevId: 323443142
2020-07-27Add device implementation for /dev/fuseRidwan Sharif
This PR adds the following: - [x] Marshall-able structs for fuse headers - [x] Data structures needed in /dev/fuse to communicate with the daemon server - [x] Implementation of the device interface - [x] Go unit tests This change adds the `/dev/fuse` implementation. `Connection` controls the communication between the server and the sentry. The FUSE server uses the `FileDescription` interface to interact with the Sentry. The Sentry implmenetation of fusefs, uses `Connection` and the Connection interface to interact with the Server. All communication messages are in the form of `go_marshal` backed structs defined in the ABI package. This change also adds some go unit tests that test (pretty basically) the interfaces and should be used as an example of an end to end FUSE operation. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/3083 from ridwanmsharif:ridwanmsharif/fuse-device-impl 69aa2ce970004938fe9f918168dfe57636ab856e PiperOrigin-RevId: 323428180
2020-07-27Move platform.File in memmapAndrei Vagin
The subsequent systrap changes will need to import memmap from the platform package. PiperOrigin-RevId: 323409486
2020-07-26Add profiling to dockerutilZach Koopmans
Adds profiling with `runsc debug` or pprof to dockerutil. All targets using dockerutil should now be able to use profiling. In addition, modifies existing benchmarks to use profiling. PiperOrigin-RevId: 323298634
2020-07-26updated the functions to distinguish IA/DA for Arm64Bin Lu
We need to correctly distinguish instruction_abort/data_abort for mem_abort@Arm64. So, EC/WNR/FSC in esr_el1 should be checked. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-26allow guest user applications read CNTVCT_EL0/CNTFRQ_EL0Bin Lu
At present, when doing syscall_kvm test, we need to enable the function of ESR_ELx_SYS64_ISS_SYS_CNTVCT/ESR_ELx_SYS64_ISS_SYS_CNTFRQ to successfully pass the test. I set CNTKCTL_EL1.EL0VCTEN==1/CNTKCTL_EL1.EL0PCTEN==1, so that the related cases can passed. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-24Enable automated marshalling for netstack.Ayush Ranjan
PiperOrigin-RevId: 322954792
2020-07-23Merge pull request #3142 from tanjianfeng:fix-3141gVisor bot
PiperOrigin-RevId: 322937495
2020-07-23Merge pull request #3317 from sevki:patch-2gVisor bot
PiperOrigin-RevId: 322928424
2020-07-23Add permission checks to vfs2 truncate.Dean Deng
- Check write permission on truncate(2). Unlike ftruncate(2), truncate(2) fails if the user does not have write permissions on the file. - For gofers under InteropModeShared, check file type before making a truncate request. We should fail early and avoid making an rpc when possible. Furthermore, depending on the remote host's failure may give us unexpected behavior--if the host converts the truncate request to an ftruncate syscall on an open fd, we will get EINVAL instead of EISDIR. Updates #2923. PiperOrigin-RevId: 322913569
2020-07-23FileDescription is hard to spell.Dean Deng
Fix typos. PiperOrigin-RevId: 322913282
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