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2019-10-23Keep minimal available fd to accelerate fd allocationDarcySail
Use fd.next to store the iteration start position, which can be used to accelerate allocating new FDs. And adding the corresponding gtest benchmark to measure performance. @tanjianfeng COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/758 from DarcySail:master 96685ec7886dfe1a64988406831d3bc002b438cc PiperOrigin-RevId: 276351250
2019-10-23Inform netstack integrator when Duplicate Address Detection completesGhanan Gowripalan
This change introduces a new interface, stack.NDPDispatcher. It can be implemented by the netstack integrator to receive NDP related events. As of this change, only DAD related events are supported. Tests: Existing tests were modified to use the NDPDispatcher's DAD events for DAD tests where it needed to wait for DAD completing (failing and resolving). PiperOrigin-RevId: 276338733
2019-10-23Remove comparison between signed and unsigned intMichael Pratt
Some compilers don't like the comparison between int and size_t. Remove it. The other changes are minor style cleanups. PiperOrigin-RevId: 276333450
2019-10-22Merge pull request #1046 from tomlanyon:criogVisor bot
PiperOrigin-RevId: 276172466
2019-10-22Update const names to be Go style.Ian Lewis
PiperOrigin-RevId: 276165962
2019-10-22platform/ptrace: exit without panic if a stub process has been killed by SIGKILLAndrei Vagin
SIGKILL can be sent only by an user or OOM-killer. In both cases, we don't need to panic. PiperOrigin-RevId: 276150120
2019-10-22Add a type to represent the NDP Router Advertisement message.Ghanan Gowripalan
This change is in preparation for NDP Router Discovery where the stack will need to handle NDP Router Advertisments. Tests: Test that given an NDP Router Advertisement buffer (body of an ICMPv6 packet, correct values are returned by the field getters). PiperOrigin-RevId: 276146817
2019-10-22Respect new PrimaryEndpointBehavior when addresses gets promoted to permanentGhanan Gowripalan
This change makes sure that when an address which is already known by a NIC and has kind = permanentExpired gets promoted to permanent, the new PrimaryEndpointBehavior is respected. PiperOrigin-RevId: 276136317
2019-10-22netstack/tcp: software segmentation offloadAndrei Vagin
Right now, we send each tcp packet separately, we call one system call per-packet. This patch allows to generate multiple tcp packets and send them by sendmmsg. The arguable part of this CL is a way how to handle multiple headers. This CL adds the next field to the Prepandable buffer. Nginx test results: Server Software: nginx/1.15.9 Server Hostname: 10.138.0.2 Server Port: 8080 Document Path: /10m.txt Document Length: 10485760 bytes w/o gso: Concurrency Level: 5 Time taken for tests: 5.491 seconds Complete requests: 100 Failed requests: 0 Total transferred: 1048600200 bytes HTML transferred: 1048576000 bytes Requests per second: 18.21 [#/sec] (mean) Time per request: 274.525 [ms] (mean) Time per request: 54.905 [ms] (mean, across all concurrent requests) Transfer rate: 186508.03 [Kbytes/sec] received sw-gso: Concurrency Level: 5 Time taken for tests: 3.852 seconds Complete requests: 100 Failed requests: 0 Total transferred: 1048600200 bytes HTML transferred: 1048576000 bytes Requests per second: 25.96 [#/sec] (mean) Time per request: 192.576 [ms] (mean) Time per request: 38.515 [ms] (mean, across all concurrent requests) Transfer rate: 265874.92 [Kbytes/sec] received w/o gso: $ ./tcp_benchmark --client --duration 15 --ideal [SUM] 0.0-15.1 sec 2.20 GBytes 1.25 Gbits/sec software gso: $ tcp_benchmark --client --duration 15 --ideal --gso $((1<<16)) --swgso [SUM] 0.0-15.1 sec 3.99 GBytes 2.26 Gbits/sec PiperOrigin-RevId: 276112677
2019-10-22Auto-generate an IPv6 link-local address based on the NIC's MAC Address.Ghanan Gowripalan
This change adds support for optionally auto-generating an IPv6 link-local address based on the NIC's MAC Address on NIC enable. Note, this change will not break existing uses of netstack as the default configuration for the stack options is set in such a way that a link-local address will not be auto-generated unless the stack is explicitly configured. See `stack.Options` for more details. Specifically, see `stack.Options.AutoGenIPv6LinkLocal`. Tests: Tests to make sure that the IPb6 link-local address is only auto-generated if the stack is specifically configured to do so. Also tests to make sure that an auto-generated address goes through the DAD process. PiperOrigin-RevId: 276059813
2019-10-21Remove old TODO.Nicolas Lacasse
PiperOrigin-RevId: 275956240
2019-10-21Add basic implementation of execveat syscall and associated tests.Dean Deng
Allow file descriptors of directories as well as AT_FDCWD. PiperOrigin-RevId: 275929668
2019-10-21Bump rules_go to v0.20.1 and go toolchain to v1.13.3.Nicolas Lacasse
PiperOrigin-RevId: 275909782
2019-10-21AF_PACKET support for netstack (aka epsocket).Kevin Krakauer
Like (AF_INET, SOCK_RAW) sockets, AF_PACKET sockets require CAP_NET_RAW. With runsc, you'll need to pass `--net-raw=true` to enable them. Binding isn't supported yet. PiperOrigin-RevId: 275909366
2019-10-20Add runsc OCI annotations to support CRI-O.Tom Lanyon
Obligatory https://xkcd.com/927 Fixes #626
2019-10-19Add support for pipes in VFS2.Kevin Krakauer
PiperOrigin-RevId: 275650307
2019-10-18Add more instructions to test/README.mdFabricio Voznika
PiperOrigin-RevId: 275565958
2019-10-18Store primary endpoints in a sliceTamir Duberstein
There's no need for a linked list here. PiperOrigin-RevId: 275565920
2019-10-18Fix typo while initializing protocol for UDP endpoints.Mithun Iyer
Fixes #763 PiperOrigin-RevId: 275563222
2019-10-18Cleanup host UDS supportMichael Pratt
This change fixes several issues with the fsgofer host UDS support. Notably, it adds support for SOCK_SEQPACKET and SOCK_DGRAM sockets [1]. It also fixes unsafe use of unet.Socket, which could cause a panic if Socket.FD is called when err != nil, and calls to Socket.FD with nothing to prevent the garbage collector from destroying and closing the socket. A set of tests is added to exercise host UDS access. This required extracting most of the syscall test runner into a library that can be used by custom tests. Updates #235 Updates #1003 [1] N.B. SOCK_DGRAM sockets are likely not particularly useful, as a server can only reply to a client that binds first. We don't allow bind, so these are unlikely to be used. PiperOrigin-RevId: 275558502
2019-10-18test/perf: optimize the getdents testAndrei Vagin
* Use mknod instead of open&close to create an empty file. * Limit a number of files to (1<<16) instead of 100K. In this case, a test set is (1, 8, 64, 512, 4K, 32K, 64K) instead of (1, 8, 64, 512, 4K, 32K, 98K). I think it is easier to compare results for 32K and 64K than 32K and 98K. And results for 98K doesn't give us more information than for 54K. PiperOrigin-RevId: 275552507
2019-10-18Remove restrictions on the sending addressTamir Duberstein
It is quite legal to send from the ANY address (it is required for DHCP). I can't figure out why the broadcast address was included here, so removing that as well. PiperOrigin-RevId: 275541954
2019-10-18test: use a bigger buffer to fill a socketAndrei Vagin
Otherwise we need to do a lot of system calls and cooperative_save tests work slow. PiperOrigin-RevId: 275536957
2019-10-17Refactor pipe to support VFS2.Kevin Krakauer
* Pulls common functionality (IO and locking on open) into pipe_util.go. * Adds pipe/vfs.go, which implements a subset of vfs.FileDescriptionImpl. A subsequent change will add support for pipes in memfs. PiperOrigin-RevId: 275322385
2019-10-17NDP Neighbor Solicitations sent during DAD must have an IP hop limit of 255Ghanan Gowripalan
NDP Neighbor Solicitations sent during Duplicate Address Detection must have an IP hop limit of 255, as all NDP Neighbor Solicitations should have. Test: Test that DAD messages have the IPv6 hop limit field set to 255. PiperOrigin-RevId: 275321680
2019-10-16Do Duplicate Address Detection on permanent IPv6 addresses.Ghanan Gowripalan
This change adds support for Duplicate Address Detection on IPv6 addresses as defined by RFC 4862 section 5.4. Note, this change will not break existing uses of netstack as the default configuration for the stack options is set in such a way that DAD will not be performed. See `stack.Options` and `stack.NDPConfigurations` for more details. Tests: Tests to make sure that the DAD process properly resolves or fails. That is, tests make sure that DAD resolves only if: - No other node is performing DAD for the same address - No other node owns the same address PiperOrigin-RevId: 275189471
2019-10-16Reorder BUILD license and load functions in gvisor.Kevin Krakauer
PiperOrigin-RevId: 275139066
2019-10-16Add sublevel to kernel versionMichael Pratt
Standard Linux kernel versions are VERSION.PATCHLEVEL.SUBLEVEL. e.g., 4.4.0, even when the sublevel is 0. Match this standard. PiperOrigin-RevId: 275125715
2019-10-16Fix problem with open FD when copy up is triggered in overlayfsFabricio Voznika
Linux kernel before 4.19 doesn't implement a feature that updates open FD after a file is open for write (and is copied to the upper layer). Already open FD will continue to read the old file content until they are reopened. This is especially problematic for gVisor because it caches open files. Flag was added to force readonly files to be reopenned when the same file is open for write. This is only needed if using kernels prior to 4.19. Closes #1006 It's difficult to really test this because we never run on tests on older kernels. I'm adding a test in GKE which uses kernels with the overlayfs problem for 1.14 and lower. PiperOrigin-RevId: 275115289
2019-10-16Support O_SYNC and O_DSYNC flags.Nicolas Lacasse
When any of these flags are set, all writes will trigger a subsequent fsync call. This behavior already existed for "write-through" mounts. O_DIRECT is treated as an alias for O_SYNC. Better support coming soon. PiperOrigin-RevId: 275114392
2019-10-16Fix syscall changes lost in rebaseMichael Pratt
These syscalls were changed in the amd64 file around the time the arm64 PR was sent out, so their changes got lost. Updates #63 PiperOrigin-RevId: 275114194
2019-10-16Merge pull request #736 from tanjianfeng:fix-unixgVisor bot
PiperOrigin-RevId: 275114157
2019-10-16Remove death from exec test namesMichael Pratt
These aren't actually death tests in the GUnit sense. i.e., they don't call EXPECT_EXIT or EXPECT_DEATH. PiperOrigin-RevId: 275099957
2019-10-15Minor vfs.FileDescriptionImpl fixes.Jamie Liu
- Pass context.Context to OnClose(). - Pass memmap.MMapOpts to ConfigureMMap() by pointer so that implementations can actually mutate it as required. PiperOrigin-RevId: 274934967
2019-10-15Remove panic when reassembly fails.Bhasker Hariharan
Reassembly can fail due to an invalid sequence of fragments being received. eg. Multiple fragments with same id which claim to be the last one by setting the more flag to 0 etc. It's safer to just drop the reassembler and increment a metric than to panic when reassembly fails. PiperOrigin-RevId: 274920901
2019-10-15Set NDP hop limit in accordance with RFC 4861Tamir Duberstein
...and do not populate link address cache at dispatch. This partially reverts 313c767b0001bf6271405f1b765b60a334d6e911, which caused malformed packets (e.g. NDP Neighbor Adverts with incorrect hop limit values) to populate the address cache. In particular, this masked a bug that was introduced to the Neighbor Advert generation code in 7c1587e3401a010d1865df61dbaf117c77dd062e. PiperOrigin-RevId: 274865182
2019-10-15Make Attach no longer a special snowflakeMichael Pratt
fsgofer.attachPoint.Attach has a bunch of funky special logic to create a RW file or connect a socket rather than creating a standard control file like localFile.Walk. This is unecessary and error-prone, as the attach point still has to go through Open or Connect which will properly convert the control file to something usable. As such, switch the logic to be equivalent to a simple Walk. Updates #235 PiperOrigin-RevId: 274827872
2019-10-14Internal change.gVisor bot
PiperOrigin-RevId: 274700093
2019-10-14Merge pull request #997 from dvrkps:patch-1gVisor bot
PiperOrigin-RevId: 274675428
2019-10-14Bump rules_go to v0.20.0 and gazelle to v0.19.0Nicolas Lacasse
PiperOrigin-RevId: 274673485
2019-10-14Reorder BUILD license and load functions in netstack.Kevin Krakauer
PiperOrigin-RevId: 274672346
2019-10-14Use a different fanoutID for each new fdbased endpoint.Bhasker Hariharan
PiperOrigin-RevId: 274638272
2019-10-11Set base to rootDavor Kapsa
2019-10-10Allow for zero byte iovec with MSG_PEEK | MSG_TRUNC in recvmsg.Ian Lewis
This allows for peeking at the length of the next message on a netlink socket without pulling it off the socket's buffer/queue, allowing tools like 'ip' to work. This CL also fixes an issue where dump_done_errno was not included in the NLMSG_DONE messages payload. Issue #769 PiperOrigin-RevId: 274068637
2019-10-10Fix bugs in fragment handling.Bhasker Hariharan
Strengthen the header.IPv4.IsValid check to correctly check for IHL/TotalLength fields. Also add a check to make sure fragmentOffsets + size of the fragment do not cause a wrap around for the end of the fragment. PiperOrigin-RevId: 274049313
2019-10-10Update TODO for OCI seccomp support.Ian Lewis
PiperOrigin-RevId: 274042343
2019-10-10Remove unnecessary assignment to pathDavor Kapsa
2019-10-10Allow rt_sigreturn in runsc goferMichael Pratt
rt_sigreturn is required for signal handling (e.g., SIGSEGV for nil-pointer dereference). Before this, nil-pointer dereferences cause a syscall violation instead of a panic. PiperOrigin-RevId: 274028767
2019-10-10Fix signalfd polling.Adin Scannell
The signalfd descriptors otherwise always show as available. This can lead programs to spin, assuming they are looking to see what signals are pending. Updates #139 PiperOrigin-RevId: 274017890
2019-10-10Merge pull request #909 from xiaobo55x:atomic_bitsopsgVisor bot
PiperOrigin-RevId: 274011064
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