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2020-03-26Add BoundEndpointAt filesystem operation.Dean Deng
BoundEndpointAt() is needed to support Unix sockets bound at a file path, corresponding to BoundEndpoint() in VFS1. Updates #1476. PiperOrigin-RevId: 303258251
2020-03-26Use host-defined file owner and mode, when possible, for imported fds.Dean Deng
Using the host-defined file owner matches VFS1. It is more correct to use the host-defined mode, since the cached value may become out of date. However, kernfs.Inode.Mode() does not return an error--other filesystems on kernfs are in-memory so retrieving mode should not fail. Therefore, if the host syscall fails, we rely on a cached value instead. Updates #1672. PiperOrigin-RevId: 303220864
2020-03-26Use panic instead of log.FatalfGhanan Gowripalan
PiperOrigin-RevId: 303212189
2020-03-26Merge pull request #2130 from nybidari:iptablesgVisor bot
PiperOrigin-RevId: 303208407
2020-03-26Handle IPv6 Fragment & Routing extension headersGhanan Gowripalan
Enables the reassembly of fragmented IPv6 packets and handling of the Routing extension header with a Segments Left value of 0. Atomic fragments are handled as described in RFC 6946 to not interfere with "normal" fragment traffic. No specific routing header type is supported. Note, the stack does not yet support sending ICMPv6 error messages in response to IPv6 packets that cannot be handled/parsed. That will come in a later change (Issue #2211). Test: - header_test.TestIPv6RoutingExtHdr - header_test.TestIPv6FragmentExtHdr - header_test.TestIPv6ExtHdrIterErr - header_test.TestIPv6ExtHdrIter - ipv6_test.TestReceiveIPv6ExtHdrs - ipv6_test.TestReceiveIPv6Fragments RELNOTES: n/a PiperOrigin-RevId: 303189584
2020-03-26Add unique ID to Mount type.Nicolas Lacasse
Analagous to Linux's mount.mnt_id. This ID is displayed in /proc/[pid]/mountinfo. PiperOrigin-RevId: 303185564
2020-03-26Support owner matching for iptables.Nayana Bidari
This feature will match UID and GID of the packet creator, for locally generated packets. This match is only valid in the OUTPUT and POSTROUTING chains. Forwarded packets do not have any socket associated with them. Packets from kernel threads do have a socket, but usually no owner.
2020-03-26Add IPv4 to bind_to_device distribution testJay Zhuang
PiperOrigin-RevId: 303156734
2020-03-26Clean up transport_demuxer.go and testJay Zhuang
- Change receiver of endpoint lookup functions - Remove unused struct fields and functions in test - s/%v/%s/ for errors - Capitalize NIC https://github.com/golang/go/wiki/CodeReviewComments#initialisms PiperOrigin-RevId: 303119580
2020-03-26Merge pull request #1986 from lubinszARM:pr_ring0_clean_1gVisor bot
PiperOrigin-RevId: 303105826
2020-03-26Combine file mode and isDir argumentsFabricio Voznika
Updates #1035 PiperOrigin-RevId: 303021328
2020-03-25Remove TODO to push down exec permission checkFabricio Voznika
Pushing it down requires all implementation to check for exec individualy which is not maintanable. Making it part of GenericCheckPermissions add extra cost to everyone that calls it. So it's better to keep is in VirtualFilesystem.OpenAt. Updates #1193 PiperOrigin-RevId: 302982993
2020-03-25Misc fixes to make stat_test pass (almost)Fabricio Voznika
The only test failing now requires socket which is not available in VFS2 yet. Updates #1198 PiperOrigin-RevId: 302976572
2020-03-25Set file mode and type to attributeFabricio Voznika
Makes less error prone to find file type. Updates #1197 PiperOrigin-RevId: 302974244
2020-03-25Fix data-race in endpoint.ReadinessBhasker Hariharan
PiperOrigin-RevId: 302924789
2020-03-25Automated rollback of changelist 301837227Bhasker Hariharan
PiperOrigin-RevId: 302891559
2020-03-24Add support for setting TCP segment hash.Bhasker Hariharan
This allows the link layer endpoints to consistenly hash a TCP segment to a single underlying queue in case a link layer endpoint does support multiple underlying queues. Updates #231 PiperOrigin-RevId: 302760664
2020-03-24Move tcpip.PacketBuffer and IPTables to stack package.Bhasker Hariharan
This is a precursor to be being able to build an intrusive list of PacketBuffers for use in queuing disciplines being implemented. Updates #2214 PiperOrigin-RevId: 302677662
2020-03-23Support basic /proc/net/dev metrics for netstackIan Lewis
Fixes #506 PiperOrigin-RevId: 302540404
2020-03-23Fix data race in SetSockOpt.Bhasker Hariharan
PiperOrigin-RevId: 302539171
2020-03-23Correctly release taskPathOperation for accessAt.Dean Deng
PiperOrigin-RevId: 302518924
2020-03-20Actually wrap rand.Reader in bufio.Reader.Bhasker Hariharan
Updates #231 PiperOrigin-RevId: 302127697
2020-03-20Remove unused variable `sndNxtList`.Ting-Yu Wang
PiperOrigin-RevId: 302110328
2020-03-19Whitelist utimensat(2).Dean Deng
utimensat is used by hostfs for setting timestamps on imported fds. Previously, this would crash the sandbox since utimensat was not allowed. Correct the VFS2 version of hostfs to match the call in VFS1. PiperOrigin-RevId: 301970121
2020-03-19Remove the "frozen" bit from dirents.Zach Koopmans
Frozen was to lock down changes to the host filesystem for hostFS. Now that hostFS is gone, it can be removed. PiperOrigin-RevId: 301907923
2020-03-19Remove redundant dep in BUILDJay Zhuang
PiperOrigin-RevId: 301859066
2020-03-19Change SocketOperations.readMu to an RWMutex.Bhasker Hariharan
Also get rid of the readViewHasData as it's not required anymore. Updates #231, #357 PiperOrigin-RevId: 301837227
2020-03-19Address comments on workMu removal change.Bhasker Hariharan
Updates #231, #357 PiperOrigin-RevId: 301833669
2020-03-19Remove workMu from tcpip.Endpoint.Bhasker Hariharan
workMu is removed and e.mu is now a mutex that supports TryLock. The packet processing path tries to lock the mutex and if its locked it will just queue the packet and move on. The endpoint.UnlockUser() will process any backlog of packets before unlocking the socket. This simplifies the locking inside tcp endpoints a lot. Further the endpoint.LockUser() implements spinning as long as the lock is not held by another syscall goroutine. This ensures low latency as not spinning leads to the task thread being put to sleep if the lock is held by the packet dispatch path. This is suboptimal as the lower layer rarely holds the lock for long so implementing spinning here helps. If the lock is held by another task goroutine then we just proceed to call LockUser() and the task could be put to sleep. The protocol goroutines themselves just call e.mu.Lock() and block if the lock is currently not available. Updates #231, #357 PiperOrigin-RevId: 301808349
2020-03-18Port imported TTY fds to vfs2.Dean Deng
Refactor fs/host.TTYFileOperations so that the relevant functionality can be shared with VFS2 (fsimpl/host.ttyFD). Incorporate host.defaultFileFD into the default host.fileDescription. This way, there is no need for a separate default_file.go. As in vfs1, the TTY file implementation can be built on top of this default and override operations as necessary (PRead/Read/PWrite/Write, Release, Ioctl). Note that these changes still need to be plumbed into runsc, which refers to imported TTYs in control/proc.go:ExecAsync. Updates #1672. PiperOrigin-RevId: 301718157
2020-03-18Deflake third_party/gvisor/pkg/gate/gate_testAndrei Vagin
TestConcurrentAll executes 1000 goroutines which never sleep, so they are not preempted by Go's runtime. In Go 1.14, async preemption has been added, but the added runtime.Gosched() call will do nothing wrong in this case too. PiperOrigin-RevId: 301705712
2020-03-18Merge pull request #2061 from lubinszARM:pr_restart_syscallgVisor bot
PiperOrigin-RevId: 301700868
2020-03-18Store segment transmit count.Ian Gudger
This will aid in segment reordering detection. Updates #691 PiperOrigin-RevId: 301692638
2020-03-18Fix FDTable.NewFDVFS2Fabricio Voznika
It was looking at VFS1 table to determine where to allocate the next FD from. Updates #1035 PiperOrigin-RevId: 301678858
2020-03-18Automated rollback of changelist 301501607Bhasker Hariharan
PiperOrigin-RevId: 301578043
2020-03-17Wrap rand.Reader in a bufio.Reader.Bhasker Hariharan
rand.Read() results in a syscall to the host on every call instead we can wrap it with a bufio.Reader to buffer and reduce number of syscalls. This is especially important for TCP where every newly created endpoint reads random data to initialize the timestamp offsets for the endpoint. Updates #231 PiperOrigin-RevId: 301501607
2020-03-17Remove HostFS from Sentry.Zach Koopmans
PiperOrigin-RevId: 301402181
2020-03-17Packetimpact in Go with c++ stubEyal Soha
PiperOrigin-RevId: 301382690
2020-03-16fdtable: don't try to zap fdtable entry if close is called for non-existing fdAndrei Vagin
FDTable.setAll is used to zap entries, but it grows the table up to a specified fd. Reported-by: syzbot+9e281b0750d2d4caa190@syzkaller.appspotmail.com PiperOrigin-RevId: 301280000
2020-03-16Enforce file size rlimits in VFS2Fabricio Voznika
Updates #1035 PiperOrigin-RevId: 301255357
2020-03-16Add calls to vfs.CheckSetStat to fsimplsFabricio Voznika
Only gofer filesystem was calling vfs.CheckSetStat for vfs.FilesystemImpl.SetStatAt and vfs.FileDescriptionImpl.SetStat. Updates #1193, #1672, #1197 PiperOrigin-RevId: 301226522
2020-03-16Enable ARP resolution in TAP devices.Ting-Yu Wang
PiperOrigin-RevId: 301208471
2020-03-16Merge pull request #1943 from kevinGC:ipt-filter-ipgVisor bot
PiperOrigin-RevId: 301197007
2020-03-16Prevent vnetHdr from escaping in WritePacket.Bhasker Hariharan
PiperOrigin-RevId: 301157950
2020-03-14Disallow kernfs.Inode.SetStat for readonly inodesFabricio Voznika
Updates #1195, #1193 PiperOrigin-RevId: 300950993
2020-03-14Plumb VFS2 imported fds into virtual filesystem.Dean Deng
- When setting up the virtual filesystem, mount a host.filesystem to contain all files that need to be imported. - Make read/preadv syscalls to the host in cases where preadv2 may not be supported yet (likewise for writing). - Make save/restore functions in kernel/kernel.go return early if vfs2 is enabled. PiperOrigin-RevId: 300922353
2020-03-13Add remaining procfs filesFabricio Voznika
Closes #1195 PiperOrigin-RevId: 300867055
2020-03-13Panic if file in FDTable has been destroyedFabricio Voznika
This will give more information about the file to identify where possibly the extra DecRef() would be. PiperOrigin-RevId: 300855874
2020-03-13Fix infinite loop in semaphore.sem.wakeWaiters().Jamie Liu
PiperOrigin-RevId: 300845134
2020-03-13Fix typoMichael Pratt
PiperOrigin-RevId: 300832988
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