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2020-01-10Automated rollback of changelist 288990597Ghanan Gowripalan
PiperOrigin-RevId: 289169518
2020-01-10Put CancellableTimer tests in the tcpip_test packageGhanan Gowripalan
CancellableTimer tests were in a timer_test package but lived within the tcpip directory. This caused issues with go tools. PiperOrigin-RevId: 289166345
2020-01-10goid: new packageIan Gudger
Allows retrieving the goroutine ID for concurrency testing when the race detector is enabled. Updates #1472 PiperOrigin-RevId: 289155308
2020-01-10panic fix in retransmitTimerExpired.Bhasker Hariharan
This is a band-aid fix for now to prevent panics. PiperOrigin-RevId: 289078453
2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2020-01-09Merge pull request #1523 from majek:fix-1522-silly-window-rxgVisor bot
PiperOrigin-RevId: 289019953
2020-01-09Inform NDPDispatcher when Stack learns about available configurations via DHCPv6Ghanan Gowripalan
Inform the Stack's NDPDispatcher when it receives an NDP Router Advertisement that updates the available configurations via DHCPv6. The Stack makes sure that its NDPDispatcher isn't informed unless the avaiable configurations via DHCPv6 for a NIC is updated. Tests: Test that a Stack's NDPDispatcher is informed when it receives an NDP Router Advertisement that informs it of new configurations available via DHCPv6. PiperOrigin-RevId: 289001283
2020-01-09Separate NDP tests into its own packageGhanan Gowripalan
Internal tools timeout after 60s during tests that are required to pass before changes can be submitted. Separate out NDP tests into its own package to help prevent timeouts when testing. PiperOrigin-RevId: 288990597
2020-01-09Merge pull request #1423 from xiaobo55x:stracegVisor bot
PiperOrigin-RevId: 288965915
2020-01-09Change BindToDeviceOption to store NICIDEyal Soha
This makes it possible to call the sockopt from go even when the NIC has no name. PiperOrigin-RevId: 288955236
2020-01-09Allow clients to store an opaque NICContext with NICsBert Muthalaly
...retrievable later via stack.NICInfo(). Clients of this library can use it to add metadata that should be tracked alongside a NIC, to avoid having to keep a map[tcpip.NICID]metadata mirroring stack.Stack's nic map. PiperOrigin-RevId: 288924900
2020-01-08CancellableTimer to encapsulate the work of safely stopping timersGhanan Gowripalan
Add a new CancellableTimer type to encapsulate the work of safely stopping timers when it fires at the same time some "related work" is being handled. The term "related work" is some work that needs to be done while having obtained some common lock (L). Example: Say we have an invalidation timer that may be extended or cancelled by some event. Creating a normal timer and simply cancelling may not be sufficient as the timer may have already fired when the event handler attemps to cancel it. Even if the timer and event handler obtains L before doing work, once the event handler releases L, the timer will eventually obtain L and do some unwanted work. To prevent the timer from doing unwanted work, it checks if it should early return instead of doing the normal work after obtaining L. When stopping the timer callers must have L locked so the timer can be safely informed that it should early return. Test: Tests that CancellableTimer fires and resets properly. Test to make sure the timer fn is not called after being stopped within the lock L. PiperOrigin-RevId: 288806984
2020-01-08Return correct length with MSG_TRUNC for unix sockets.Ian Lewis
This change calls a new Truncate method on the EndpointReader in RecvMsg for both netlink and unix sockets. This allows readers such as sockets to peek at the length of data without actually reading it to a buffer. Fixes #993 #1240 PiperOrigin-RevId: 288800167
2020-01-08Define sizes for extent headers and entries separately to improve clarity.Dean Deng
PiperOrigin-RevId: 288799694
2020-01-08Fix slice bounds out of range panic in parsing socket control message.Ting-Yu Wang
Panic found by syzakller. PiperOrigin-RevId: 288799046
2020-01-08Introduce tcpip.SockOptBoolTamir Duberstein
...and port V6OnlyOption to it. PiperOrigin-RevId: 288789451
2020-01-08Combine various Create*NIC methods into CreateNICWithOptions.Bert Muthalaly
PiperOrigin-RevId: 288779416
2020-01-08Rename tcpip.SockOpt{,Int}Tamir Duberstein
PiperOrigin-RevId: 288772878
2020-01-08Merge pull request #1273 from lubinszARM:pr_ring_3gVisor bot
PiperOrigin-RevId: 288743614
2020-01-08Make /proc/[pid] offset start at TGID_OFFSETFabricio Voznika
Updates #1195 PiperOrigin-RevId: 288725745
2020-01-08Remove redundant function argumentTamir Duberstein
PacketLooping is already a member on the passed Route. PiperOrigin-RevId: 288721500
2020-01-08Add NIC.isLoopback()Bert Muthalaly
...enabling us to remove the "CreateNamedLoopbackNIC" variant of CreateNIC and all the plumbing to connect it through to where the value is read in FindRoute. PiperOrigin-RevId: 288713093
2020-01-08Fix #1522 - implement silly window sydrome protection on rx sideMarek Majkowski
Before, each of small read()'s that raises window either from zero or above threshold of aMSS, would generate an ACK. In a classic silly-window-syndrome scenario, we can imagine a pessimistic case when small read()'s generate a stream of ACKs. This PR fixes that, essentially treating window size < aMSS as zero. We send ACK exactly in a moment when window increases to >= aMSS or half of receive buffer size (whichever smaller).
2020-01-07fs/splice: don't report a partialResult error if there is no data lossAndrei Vagin
PiperOrigin-RevId: 288642552
2020-01-07Support deprecating SLAAC addresses after the preferred lifetimeGhanan Gowripalan
Support deprecating network endpoints on a NIC. If an endpoint is deprecated, it should not be used for new connections unless a more preferred endpoint is not available, or unless the deprecated endpoint was explicitly requested. Test: Test that deprecated endpoints are only returned when more preferred endpoints are not available and SLAAC addresses are deprecated after its preferred lifetime PiperOrigin-RevId: 288562705
2020-01-07#1398 - send ACK when available buffer space gets larger than 1 MSSMarek Majkowski
When receiving data, netstack avoids sending spurious acks. When user does recv() should netstack send ack telling the sender that the window was increased? It depends. Before this patch, netstack _will_ send the ack in the case when window was zero or window >> scale was zero. Basically - when recv space increased from zero. This is not working right with silly-window-avoidance on the sender side. Some network stacks refuse to transmit segments, that will fill the window but are below MSS. Before this patch, this confuses netstack. On one hand if the window was like 3 bytes, netstack will _not_ send ack if the window increases. On the other hand sending party will refuse to transmit 3-byte packet. This patch changes that, making netstack will send an ACK when the available buffer size increases to or above 1*MSS. This will inform other party buffer is large enough, and hopefully uncork it. Signed-off-by: Marek Majkowski <marek@cloudflare.com>
2020-01-07Disable auto-generation of IPv6 link-local addresses for loopback NICsGhanan Gowripalan
Test: Test that an IPv6 link-local address is not auto-generated for loopback NICs, even when it is enabled for non-loopback NICS. PiperOrigin-RevId: 288519591
2020-01-06Pass the NIC-internal name to the NIC name function when generating opaque IIDsGhanan Gowripalan
Pass the NIC-internal name to the NIC name function when generating opaque IIDs so implementations can use the name that was provided when the NIC was created. Previously, explicit NICID to NIC name resolution was required from the netstack integrator. Tests: Test that the name provided when creating a NIC is passed to the NIC name function when generating opaque IIDs. PiperOrigin-RevId: 288395359
2020-01-06platform/syscall: use syscall + int3 to execute a system call in a stub processAndrei Vagin
Right now, we need to call ptrace(PTRACE_SYSCALL) and wait() twice to execute one system call in a stub process. With these changes, we will need to call ptrace + wait only once. In addition, this allows to workaround the kernel bug when a stub process doesn't stop on syscall-exit-stop and starts executing the next system call. Reported-by: syzbot+37143cafa8dc3b5008ee@syzkaller.appspotmail.com PiperOrigin-RevId: 288393029
2020-01-06Convert memfs into proto-tmpfs.Nicolas Lacasse
- Renamed memfs to tmpfs. - Copied fileRangeSet bits from fs/fsutil/ to fsimpl/tmpfs/ - Changed tmpfs to be backed by filemem instead of byte slice. - regularFileReadWriter uses a sync.Pool, similar to gofer client. PiperOrigin-RevId: 288356380
2020-01-06Implement rseq(2)Michael Pratt
PiperOrigin-RevId: 288342928
2020-01-06Cleanup Shm reference handlingMichael Pratt
Currently, shm.Registry.FindByID will return Shm instances without taking an additional reference on them, making it possible for them to disappear. More explicitly handle references. All callers hold a reference for the duration that they hold the instance. Registry.shms may transitively hold Shms with no references, so it must TryIncRef to determine if they are still valid. PiperOrigin-RevId: 288314529
2020-01-03Use opaque interface identifiers when generating IPv6 addresses via SLAACGhanan Gowripalan
Support using opaque interface identifiers when generating IPv6 addresses via SLAAC when configured to do so. Note, this change does not handle retries in response to DAD conflicts yet. That will also come in a later change. Test: Test that when SLAAC addresses are generated, they use opaque interface identifiers when configured to do so. PiperOrigin-RevId: 288078605
2020-01-03Remove FIXME comments to close old bug.Zach Koopmans
PiperOrigin-RevId: 288075400
2020-01-03Support generating opaque interface identifiers as defined by RFC 7217Ghanan Gowripalan
Support generating opaque interface identifiers as defined by RFC 7217 for auto-generated IPv6 link-local addresses. Opaque interface identifiers will also be used for IPv6 addresses auto-generated via SLAAC in a later change. Note, this change does not handle retries in response to DAD conflicts yet. That will also come in a later change. Tests: Test that when configured to generated opaque IIDs, they are properly generated as outlined by RFC 7217. PiperOrigin-RevId: 288035349
2019-12-30Add VFS2 support for device special files.Jamie Liu
- Add FileDescriptionOptions.UseDentryMetadata, which reduces the amount of boilerplate needed for device FDs and the like between filesystems. - Switch back to having FileDescription.Init() take references on the Mount and Dentry; otherwise managing refcounts around failed calls to OpenDeviceSpecialFile() / Device.Open() is tricky. PiperOrigin-RevId: 287575574
2019-12-27Add VFS2 support for /proc/filesystems.Jamie Liu
Updates #1195 PiperOrigin-RevId: 287269106
2019-12-26Initial procfs implementation in VFSv2Fabricio Voznika
Updates #1195 PiperOrigin-RevId: 287227722
2019-12-26Merge pull request #1461 from xiaobo55x:ptrace_sysemugVisor bot
PiperOrigin-RevId: 287225250
2019-12-26Merge pull request #1460 from lubinszARM:pr_clean_code1gVisor bot
PiperOrigin-RevId: 287221280
2019-12-26Automated rollback of changelist 287029703gVisor bot
PiperOrigin-RevId: 287217899
2019-12-24Enable IP_RECVTOS socket option for datagram socketsRyan Heacock
Added the ability to get/set the IP_RECVTOS socket option on UDP endpoints. If enabled, TOS from the incoming Network Header passed as ancillary data in the ControlMessages. Test: * Added unit test to udp_test.go that tests getting/setting as well as verifying that we receive expected TOS from incoming packet. * Added a syscall test PiperOrigin-RevId: 287029703
2019-12-24slight changes to ring0&pagetables for Arm64Bin Lu
There are 2 jobs have been finished in this patch: 1, a comment was added to explain the purpose of the extra NOPs in Vectors(). 2, some merge errors were fixed. Signed-off-by: Bin Lu <bin.lu@arm.com>
2019-12-23Fix deadlock in kernfs.Filesystem.revalidateChildLockedFabricio Voznika
It was calling Dentry.InsertChild with the dentry's mutex already locked. Updates #1035 PiperOrigin-RevId: 286962742
2019-12-23Clean up vfs.FilesystemImpl methods that operate on parent directories.Jamie Liu
- Make FilesystemImpl methods that operate on parent directories require !rp.Done() (i.e. there is at least one path component to resolve) as precondition and postcondition (in cases where they do not finish path resolution due to mount boundary / absolute symlink), and require that they do not need to follow the last path component (the file being created / deleted) as a symlink. Check for these in VFS. - Add FilesystemImpl.GetParentDentryAt(), which is required to obtain the old parent directory for VFS.RenameAt(). (Passing the Dentry to be renamed instead has the wrong semantics if the file named by the old path is a mount point since the Dentry will be on the wrong Mount.) - Update memfs to implement these methods correctly (?), including RenameAt. - Change fspath.Parse() to allow empty paths (to simplify implementation of AT_EMPTY_PATH). - Change vfs.PathOperation to take a fspath.Path instead of a raw pathname; non-test callers will need to fspath.Parse() pathnames themselves anyway in order to detect absolute paths and select PathOperation.Start accordingly. PiperOrigin-RevId: 286934941
2019-12-23Clear any host-specific NDP state when becoming a routerGhanan Gowripalan
This change supports clearing all host-only NDP state when NICs become routers. All discovered routers, discovered on-link prefixes and auto-generated addresses will be invalidated when becoming a router. This is because normally, routers do not process Router Advertisements to discover routers or on-link prefixes, and do not do SLAAC. Tests: Unittest to make sure that all discovered routers, discovered prefixes and auto-generated addresses get invalidated when transitioning from a host to a router. PiperOrigin-RevId: 286902309
2019-12-23Replace syscall.PTRACE_SYSEMU with unix.PTRACE_SYSEMUHaibo Xu
Linux PTRACE_SYSEMU support on arm64 was merged to mainline from V5.3, and the corresponding support in go also enabled recently. Since the "syscall" package is locked down from go 1.4, so the ptrace PTRACE_SYSEMU definition can't be added to package "syscall" on arm64. According to the golang community, updates required by new systems or versions should use the corresponding package in the golang.org/x/sys repository instead(https://golang.org/pkg/syscall/). Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I2f917bb2be62f990c3e158e2bb99e094ea03f751
2019-12-20Add vfs.ResolvingPath.HandleJump().Jamie Liu
PiperOrigin-RevId: 286666533
2019-12-20Add vfs.Dentry.Children().Jamie Liu
PiperOrigin-RevId: 286660774
2019-12-20Change TODO to track correct bug.Kevin Krakauer
PiperOrigin-RevId: 286639163
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