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2019-02-27Ping support via IPv4 raw sockets.Kevin Krakauer
Broadly, this change: * Enables sockets to be created via `socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)`. * Passes the network-layer (IP) header up the stack to the transport endpoint, which can pass it up to the socket layer. This allows a raw socket to return the entire IP packet to users. * Adds functions to stack.TransportProtocol, stack.Stack, stack.transportDemuxer that enable incoming packets to be delivered to raw endpoints. New raw sockets of other protocols (not ICMP) just need to register with the stack. * Enables ping.endpoint to return IP headers when created via SOCK_RAW. PiperOrigin-RevId: 235993280 Change-Id: I60ed994f5ff18b2cbd79f063a7fdf15d093d845a
2019-02-27Allow overlay to merge Directories and SepcialDirectories.Nicolas Lacasse
Needed to mount inside /proc or /sys. PiperOrigin-RevId: 235936529 Change-Id: Iee6f2671721b1b9b58a3989705ea901322ec9206
2019-02-26Fix bad mergeFabricio Voznika
PiperOrigin-RevId: 235818534 Change-Id: I99f7e3fd1dc808b35f7a08b96b7c3226603ab808
2019-02-26Adds a WriteRawPacket method to the InjectableLinkEndpoint interface.Googler
Also exposes ipv4.MaxTotalSize since it is a generally useful constant. PiperOrigin-RevId: 235799755 Change-Id: I1fa8d5294bf355acf5527cfdf274b3687d3c8b13
2019-02-26FPE_INTOVF (integer overflow) should be 2 refer to Linux.Ruidong Cao
Signed-off-by: Ruidong Cao <crdfrank@gmail.com> Change-Id: I03f8ab25cf29257b31f145cf43304525a93f3300 PiperOrigin-RevId: 235763203
2019-02-26Lazily allocate inotify map on inodeFabricio Voznika
PiperOrigin-RevId: 235735865 Change-Id: I84223eb18eb51da1fa9768feaae80387ff6bfed0
2019-02-26Use more conservative locking in NIC.DeliverNetworkPacketAmanda Tait
An earlier CL excessively minimizes the period in which it holds a lock on NIC. This earlier CL had done this out of the mistaken impression it fixed a broken test, when in fact it just reduced the rate of failure of a flaky test in tcp_test.go. This new change holds the lock on NIC for the duration of the loop over n.endpoints. PiperOrigin-RevId: 235732487 Change-Id: I53ee6df264f093ddc4d29e9acdcba6b4838cb112
2019-02-25Add a SACK scoreboard to TCP endpoints.Bhasker Hariharan
This change does not make use of SACK information but adds support to track SACK information and store it in the endpoint. The actual SACK based recovery will be in a separate CL. Part of commits to add RFC 6675 support to Netstack. PiperOrigin-RevId: 235612264 Change-Id: I261f94844d7bad5abda803152ce6cc6125a467ff
2019-02-25Don't call WalkGetAttr for walk(names=[]).Jamie Liu
PiperOrigin-RevId: 235587729 Change-Id: I37074416b10a30ca3a00d11bcde338d8d979beaf
2019-02-25Handle invalid offset in sendfile(2)Fabricio Voznika
PiperOrigin-RevId: 235578698 Change-Id: I608ff5e25eac97f6e1bda058511c1f82b0e3b736
2019-02-25Fix race condition in NIC.DeliverNetworkPacketAmanda Tait
cl/234850781 introduced a race condition in NIC.DeliverNetworkPacket by failing to hold a lock. This change fixes this regressesion by acquiring a read lock before iterating through n.endpoints, and then releasing the lock once iteration is complete. PiperOrigin-RevId: 235549770 Change-Id: Ib0133288be512d478cf759c3314dc95ec3205d4b
2019-02-24Internal change.Googler
PiperOrigin-RevId: 235447861 Change-Id: Ic6ba5e0ed89f1b85651da084be70ef8d0ffc13cf
2019-02-22Rename ping endpoints to icmp endpoints.Kevin Krakauer
PiperOrigin-RevId: 235248572 Change-Id: I5b0538b6feb365a98712c2a2d56d856fe80a8a09
2019-02-21Internal change.Googler
PiperOrigin-RevId: 235053594 Change-Id: Ie3d7b11843d0710184a2463886c7034e8f5305d1
2019-02-20Automated rollback of changelist 234680481Michael Pratt
PiperOrigin-RevId: 234892473 Change-Id: Ie568c67d299082a008a1cf9802942e5e03746501
2019-02-20Make some ptrace commands x86-onlyHaibo Xu
Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I9751f859332d433ca772d6b9733f5a5a64398ec7 PiperOrigin-RevId: 234877624
2019-02-20Implement Broadcast supportAmanda Tait
This change adds support for the SO_BROADCAST socket option in gVisor Netstack. This support includes getsockopt()/setsockopt() functionality for both UDP and TCP endpoints (the latter being a NOOP), dispatching broadcast messages up and down the stack, and route finding/creation for broadcast packets. Finally, a suite of tests have been implemented, exercising this functionality through the Linux syscall API. PiperOrigin-RevId: 234850781 Change-Id: If3e666666917d39f55083741c78314a06defb26c
2019-02-19Updates tcp_proxy to use an AF_PACKET and veth devices.Bhasker Hariharan
tcp_proxy now uses an AF_PACKET socket as the FD for netstack link layer endpoint instead of a tap device. It also changes the link layer endpoint to use PacketMMap dispatch instead of Readv. This reduces overall cpu and reflects the current runsc setup which uses PacketMMap and also uses veth devices to receive packets. Also fixed a bug in gonet where Read() was not doing coalescing read and would read small amounts at a time. PiperOrigin-RevId: 234714768 Change-Id: Idabf8e600e4512489d3ba441c4096dc74deba5d7
2019-02-19netstack: Add SIOCGSTAMP support.Kevin Krakauer
Ping sometimes uses this instead of SO_TIMESTAMP. PiperOrigin-RevId: 234699590 Change-Id: Ibec9c34fa0d443a931557a2b1b1ecd83effe7765
2019-02-19Rename "perfctr_l2" to "perfctr_llc"Michael Pratt
910448bbed066ab1082b510eef1ae61bb792d854 ("perf/x86/amd/uncore: Rename cpufeatures macro for cache counters") in 4.14 changed the name. We change both the internal and cpuinfo name. As the upstream commit states, "In Family 17h, L3 is the last level cache as opposed to L2 in previous families. Avoid this name confusion ..." PiperOrigin-RevId: 234698034 Change-Id: Ibf2efd4c0b83c1a8b5bb123da65ea1d7c6acd778
2019-02-19Add p9.Sticky.Jamie Liu
PiperOrigin-RevId: 234691125 Change-Id: I2a588153ded5a4fbed07bc2f0937a43ccfba791b
2019-02-19Set rax to syscall number on SECCOMP_RET_TRAP.Jamie Liu
PiperOrigin-RevId: 234690475 Change-Id: I1cbfb5aecd4697a4a26ec8524354aa8656cc3ba1
2019-02-19Rename "rdt" to "rdt_a"Michael Pratt
The final merged patch in Linux 4.10, 4ab1586488cb56ed8728e54c4157cc38646874d9 ("x86/cpufeature: Add RDT CPUID feature bits") named this feature "rdt_a". Earlier patch sets had named this "rdt". PiperOrigin-RevId: 234680481 Change-Id: I0cc968201ec9a2825701405e207994a7331322b7
2019-02-19Fix clone(CLONE_NEWUSER).Jamie Liu
- Use new user namespace for namespace creation checks. - Ensure userns is never nil since it's used by other namespaces. PiperOrigin-RevId: 234673175 Change-Id: I4b9d9d1e63ce4e24362089793961a996f7540cd9
2019-02-19Break /proc/[pid]/{uid,gid}_map's dependence on seqfile.Jamie Liu
In addition to simplifying the implementation, this fixes two bugs: - seqfile.NewSeqFile unconditionally creates an inode with mode 0444, but {uid,gid}_map have mode 0644. - idMapSeqFile.Write implements fs.FileOperations.Write ... but it doesn't implement any other fs.FileOperations methods and is never used as fs.FileOperations. idMapSeqFile.GetFile() => seqfile.SeqFile.GetFile() uses seqfile.seqFileOperations instead, which rejects all writes. PiperOrigin-RevId: 234638212 Change-Id: I4568f741ab07929273a009d7e468c8205a8541bc
2019-02-15Implement IP_MULTICAST_IF.Ian Gudger
This allows setting a default send interface for IPv4 multicast. IPv6 support will come later. PiperOrigin-RevId: 234251379 Change-Id: I65922341cd8b8880f690fae3eeb7ddfa47c8c173
2019-02-15Internal change.Googler
PiperOrigin-RevId: 234237297 Change-Id: Ic9b7a37db831556d2c2cf733a6e27fba27afee0b
2019-02-15Move SO_TIMESTAMP from different transport endpoints to epsocket.Kevin Krakauer
SO_TIMESTAMP is reimplemented in ping and UDP sockets (and needs to be added for TCP), but can just be implemented in epsocket for simplicity. This will also make SIOCGSTAMP easier to implement. PiperOrigin-RevId: 234179300 Change-Id: Ib5ea0b1261dc218c1a8b15a65775de0050fe3230
2019-02-15Internal change.Googler
PiperOrigin-RevId: 234169795 Change-Id: I3c576ae6ad460e2c0e3f142a2671dc18d34a07ef
2019-02-15Redirect FIXME to more appropriate bugFabricio Voznika
PiperOrigin-RevId: 234147487 Change-Id: I779a6012832bb94a6b89f5bcc7d821b40ae969cc
2019-02-14Don't allow writing or reading to TTY unless process group is in foreground.Nicolas Lacasse
If a background process tries to read from a TTY, linux sends it a SIGTTIN unless the signal is blocked or ignored, or the process group is an orphan, in which case the syscall returns EIO. See drivers/tty/n_tty.c:n_tty_read()=>job_control(). If a background process tries to write a TTY, set the termios, or set the foreground process group, linux then sends a SIGTTOU. If the signal is ignored or blocked, linux allows the write. If the process group is an orphan, the syscall returns EIO. See drivers/tty/tty_io.c:tty_check_change(). PiperOrigin-RevId: 234044367 Change-Id: I009461352ac4f3f11c5d42c43ac36bb0caa580f9
2019-02-14Internal change.Googler
PiperOrigin-RevId: 234011346 Change-Id: Ic69375ddb3794dd0d3d6e62ee4dc60fdf4baf2c7
2019-02-13Add support for using PACKET_RX_RING to receive packets.Bhasker Hariharan
PACKET_RX_RING allows the use of an mmapped buffer to receive packets from the kernel. This should cut down the number of host syscalls that need to be made to receive packets when the underlying fd is a socket of the AF_PACKET type. PiperOrigin-RevId: 233834998 Change-Id: I8060025c6ced206986e94cc46b8f382b81bfa47f
2019-02-13Improve safecopy sanity checks.Jamie Liu
- Fix CopyIn/CopyOut/ZeroOut range checks. - Include the faulting signal number in the panic message. PiperOrigin-RevId: 233829501 Change-Id: I8959ead12d05dbd4cd63c2b908cddeb2a27eb513
2019-02-13Internal change.Googler
PiperOrigin-RevId: 233802562 Change-Id: I40e1b13fd571daaf241b00f8df4bcedd034dc3f1
2019-02-13Expose XSAVES in /proc/cpuinfoMichael Pratt
Linux started doing this in b8be15d588060a03569ac85dc4a0247460988f5b ("x86/fpu/xstate: Re-enable XSAVES"), which first appeared in 4.8. PiperOrigin-RevId: 233800931 Change-Id: Icac2c2b03ccf1a91f3070431efb5152ca619fca3
2019-02-11Do not drop packets w/ missing TCP timestamps.Bhasker Hariharan
RFC7323 recommends that if the timestamp option was negotiated then all packets should carry a TCP Timestamp and any packets that do not should be dropped. Netstack implemented this behaviour. Linux OTOH does not and will accept such packets. This change makes Netstack behaviour compatible with Linux. Also now that we allow such packets, we do need to update RTO calculations based on these packets even if timestamp option is enabled. PiperOrigin-RevId: 233432268 Change-Id: I9f4742ae6b63930ac3b5e37d8c238761e6a4b29f
2019-02-08Add fs.AsyncWithContext and call it in fs/gofer/inodeOperations.Release.Nicolas Lacasse
fs/gofer/inodeOperations.Release does some asynchronous work. Previously it was calling fs.Async with an anonymous function, which caused the function to be allocated on the heap. Because Release is relatively hot, this results in a lot of small allocations and increased GC pressure, noticeable in perf profiles. This CL adds a new function, AsyncWithContext, which is just like Async, but passes a context to the async function. It avoids the need for an extra anonymous function in fs/gofer/inodeOperations.Release. The Async function itself still requires a single anonymous function. PiperOrigin-RevId: 233141763 Change-Id: I1dce4a883a7be9a8a5b884db01e654655f16d19c
2019-02-08Encode stat to bytes manually, instead of calling CopyObjectOut.Nicolas Lacasse
CopyObjectOut grows its destination byte slice incrementally, causing many small slice allocations on the heap. This leads to increased GC and noticeably slower stat calls. PiperOrigin-RevId: 233140904 Change-Id: Ieb90295dd8dd45b3e56506fef9d7f86c92e97d97
2019-02-08Fix build error.Ian Gudger
PiperOrigin-RevId: 233139020 Change-Id: I2e7089fa25d20e5662eb941054a684d41f5d3e12
2019-02-08Internal change.Christopher Koch
PiperOrigin-RevId: 233124342 Change-Id: Id4b4857af89815ffb9254cc30df4244b2768d9f2
2019-02-08CopyObjectOut should allocate a byte slice the size of the encoded object.Nicolas Lacasse
This adds an extra Reflection call to CopyObjectOut, but avoids many small slice allocations if the object is large, since without this we grow the backing slice incrementally as we encode more data. PiperOrigin-RevId: 233110960 Change-Id: I93569af55912391e5471277f779139c23f040147
2019-02-08Keep FilePayloads open on server side until after RPC completed.Christopher Koch
Prevents URPC FDs from being closed mid-call, especially if they are used as raw FDs. PiperOrigin-RevId: 233087955 Change-Id: I815a2ff32cc5f03774605aef0b35a32862f8e633
2019-02-07Plumb IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP to netstack.Ian Gudger
Also includes a few fixes for IPv4 multicast support. IPv6 support is coming in a followup CL. PiperOrigin-RevId: 233008638 Change-Id: If7dae6222fef43fda48033f0292af77832d95e82
2019-02-07Implement /proc/net/unix.Rahat Mahmood
PiperOrigin-RevId: 232948478 Change-Id: Ib830121e5e79afaf5d38d17aeef5a1ef97913d23
2019-02-07Make context.Background return a global background context.Nicolas Lacasse
It currently allocates a new context on the heap each time it is called. Some of these are in relatively hot paths like signal delivery and releasing gofer inodes. It is also called very commonly in afterLoad. All of these should benefit from fewer heap allocations. PiperOrigin-RevId: 232938873 Change-Id: I53cec0ca299f56dcd4866b0b4fd2ec4938526849
2019-02-07Internal change.Googler
PiperOrigin-RevId: 232937200 Change-Id: I5c3709cc8f1313313ff618a45e48c14a3a111cb4
2019-02-07Implement semctl(2) SETALL and GETALLFabricio Voznika
PiperOrigin-RevId: 232914984 Change-Id: Id2643d7ad8e986ca9be76d860788a71db2674cda
2019-02-05Change /proc/PID/cmdline to read environment vector.Zach Koopmans
- Change proc to return envp on overwrite of argv with limitations from upstream. - Add unit tests - Change layout of argv/envp on the stack so that end of argv is contiguous with beginning of envp. PiperOrigin-RevId: 232506107 Change-Id: I993880499ab2c1220f6dc456a922235c49304dec
2019-02-01CachingInodeOperations was over-dirtying cached attributesFabricio Voznika
Dirty should be set only when the attribute is changed in the cache only. Instances where the change was also sent to the backing file doesn't need to dirty the attribute. Also remove size update during WriteOut as writing dirty page would naturaly grow the file if needed. RELNOTES: relnotes is needed for the parent CL. PiperOrigin-RevId: 232068978 Change-Id: I00ba54693a2c7adc06efa9e030faf8f2e8e7f188
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