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2019-06-21Merge 5ba16d51 (automated)gVisor bot
2019-06-21Add list of stuck tasks to panic messageFabricio Voznika
PiperOrigin-RevId: 254450309
2019-06-21Merge c0317b28 (automated)gVisor bot
2019-06-21Merge f94653b3 (automated)gVisor bot
2019-06-21kernel: call t.mu.Unlock() explicitly in WithMuLockedAndrei Vagin
defer here doesn't improve readability, but we know it slower that the explicit call. PiperOrigin-RevId: 254441473
2019-06-21Merge 335fd987 (automated)gVisor bot
2019-06-21Merge 054b5632 (automated)gVisor bot
2019-06-21Update commentFabricio Voznika
PiperOrigin-RevId: 254428866
2019-06-21Merge dc36c34a (automated)gVisor bot
2019-06-20Merge 3c7448ab (automated)gVisor bot
2019-06-20Merge 292f70cb (automated)gVisor bot
2019-06-20Preallocate auth.NewAnonymousCredentials() in contexttest.TestContext.Jamie Liu
Otherwise every call to, say, fs.ContextCanAccessFile() in a benchmark using contexttest allocates new auth.Credentials, a new auth.UserNamespace, ... PiperOrigin-RevId: 254261051
2019-06-20Add package docs to seqfile and ramfsMichael Pratt
These are the only packages missing docs: https://godoc.org/gvisor.dev/gvisor PiperOrigin-RevId: 254261022
2019-06-20Merge 0b213507 (automated)gVisor bot
2019-06-20Implement madvise(MADV_DONTFORK)Neel Natu
PiperOrigin-RevId: 254253777
2019-06-20Merge b46ec370 (automated)gVisor bot
2019-06-20Merge 7e495156 (automated)gVisor bot
2019-06-19Deflake SendFileTest_Shutdown.Ian Gudger
The sendfile syscall's backing doSplice contained a race with regard to blocking. If the first attempt failed with syserror.ErrWouldBlock and then the blocking file became ready before registering a waiter, we would just return the ErrWouldBlock (even if we were supposed to block). PiperOrigin-RevId: 254114432
2019-06-20Merge c2d87d5d (automated)gVisor bot
2019-06-19Merge 9781128d (automated)gVisor bot
2019-06-19Merge 773423a9 (automated)gVisor bot
2019-06-19Merge 9d2efaac (automated)gVisor bot
2019-06-19Merge 29f9e4fa (automated)gVisor bot
2019-06-19fileOp{On,At} should pass the remaning symlink traversal count.Nicolas Lacasse
And methods that do more traversals should use the remaining count rather than resetting. PiperOrigin-RevId: 254041720
2019-06-19Merge f7428af9 (automated)gVisor bot
2019-06-19Add MountNamespace to task.Nicolas Lacasse
This allows tasks to have distinct mount namespace, instead of all sharing the kernel's root mount namespace. Currently, the only way for a task to get a different mount namespace than the kernel's root is by explicitly setting a different MountNamespace in CreateProcessArgs, and nothing does this (yet). In a follow-up CL, we will set CreateProcessArgs.MountNamespace when creating a new container inside runsc. Note that "MountNamespace" is a poor term for this thing. It's more like a distinct VFS tree. When we get around to adding real mount namespaces, this will need a better naem. PiperOrigin-RevId: 254009310
2019-06-19Merge ca245a42 (automated)gVisor bot
2019-06-18Attempt to fix TestPipeWritesAccumulateFabricio Voznika
Test fails because it's reading 4KB instead of the expected 64KB. Changed the test to read pipe buffer size instead of hardcode and added some logging in case the reason for failure was not pipe buffer size. PiperOrigin-RevId: 253916040
2019-06-18Merge 546b2948 (automated)gVisor bot
2019-06-18Merge 0e07c94d (automated)gVisor bot
2019-06-18Merge bdb19b82 (automated)gVisor bot
2019-06-18Merge ec15fb11 (automated)gVisor bot
2019-06-18Merge 8ab0848c (automated)gVisor bot
2019-06-18gvisor/fs: don't update file.offset for sockets, pipes, etcAndrei Vagin
sockets, pipes and other non-seekable file descriptors don't use file.offset, so we don't need to update it. With this change, we will be able to call file operations without locking the file.mu mutex. This is already used for pipes in the splice system call. PiperOrigin-RevId: 253746644
2019-06-18Merge 66cc0e9f (automated)gVisor bot
2019-06-17Merge 99d28637 (automated)gVisor bot
2019-06-14Merge a8608c50 (automated)gVisor bot
2019-06-14Merge 3d71c627 (automated)gVisor bot
2019-06-13Add support for TCP receive buffer auto tuning.Bhasker Hariharan
The implementation is similar to linux where we track the number of bytes consumed by the application to grow the receive buffer of a given TCP endpoint. This ensures that the advertised window grows at a reasonable rate to accomodate for the sender's rate and prevents large amounts of data being held in stack buffers if the application is not actively reading or not reading fast enough. The original paper that was used to implement the linux receive buffer auto- tuning is available @ https://public.lanl.gov/radiant/pubs/drs/lacsi2001.pdf NOTE: Linux does not implement DRS as defined in that paper, it's just a good reference to understand the solution space. Updates #230 PiperOrigin-RevId: 253168283
2019-06-14Merge 3e9b8ecb (automated)gVisor bot
2019-06-13Plumb context through more layers of filesytem.Ian Gudger
All functions which allocate objects containing AtomicRefCounts will soon need a context. PiperOrigin-RevId: 253147709
2019-06-14Merge 7b0f0682 (automated)gVisor bot
2019-06-13Fix deadlock in fasync.Ian Gudger
The deadlock can occur when both ends of a connected Unix socket which has FIOASYNC enabled on at least one end are closed at the same time. One end notifies that it is closing, calling (*waiter.Queue).Notify which takes waiter.Queue.mu (as a read lock) and then calls (*FileAsync).Callback, which takes FileAsync.mu. The other end tries to unregister for notifications by calling (*FileAsync).Unregister, which takes FileAsync.mu and calls (*waiter.Queue).EventUnregister which takes waiter.Queue.mu. This is fixed by moving the calls to waiter.Waitable.EventRegister and waiter.Waitable.EventUnregister outside of the protection of any mutex used in (*FileAsync).Callback. The new test is related, but does not cover this particular situation. Also fix a data race on FileAsync.e.Callback. (*FileAsync).Callback checked FileAsync.e.Callback under the protection of FileAsync.mu, but the waiter calling (*FileAsync).Callback could not and did not. This is fixed by making FileAsync.e.Callback immutable before passing it to the waiter for the first time. Fixes #346 PiperOrigin-RevId: 253138340
2019-06-13Implement getsockopt() SO_DOMAIN, SO_PROTOCOL and SO_TYPE.Rahat Mahmood
SO_TYPE was already implemented for everything but netlink sockets. PiperOrigin-RevId: 253138157
2019-06-13Merge add40fd6 (automated)gVisor bot
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-06-13Merge 4fdd560b (automated)gVisor bot
2019-06-13Merge 9f77b36f (automated)gVisor bot
2019-06-13Merge 94ab253d (automated)gVisor bot
2019-06-12Merge 70578806 (automated)gVisor bot
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