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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
2019-02-01Factor the subtargets method into a helper method with tests.Nicolas Lacasse
PiperOrigin-RevId: 232047515 Change-Id: I00f036816e320356219be7b2f2e6d5fe57583a60
2019-01-31Move package sync to third_partyMichael Pratt
PiperOrigin-RevId: 231889261 Change-Id: I482f1df055bcedf4edb9fe3fe9b8e9c80085f1a0
2019-01-31Fix commentMichael Pratt
PiperOrigin-RevId: 231861005 Change-Id: I134d4e20cc898d44844219db0a8aacda87e11ef0
2019-01-31Invalidate COW mappings when file is truncatedFabricio Voznika
This changed required making fsutil.HostMappable use a backing file to ensure the correct FD would be used for read/write operations. RELNOTES: relnotes is needed for the parent CL. PiperOrigin-RevId: 231836164 Change-Id: I8ae9639715529874ea7d80a65e2c711a5b4ce254
2019-01-31Don't mask out sticky bit to/from goferFabricio Voznika
RELNOTES: sticky bit propagates to gofers now. PiperOrigin-RevId: 231822453 Change-Id: I73426170b9457350480a3b144a2baf937e7cb477
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2019-01-30Add muldiv/rd_tsc support for arm64 platform.Haibo Xu
Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: If35459be78e023346a140184401172f8e023c7f9 PiperOrigin-RevId: 231638020
2019-01-29Fix IsLost check to match the description in RFC6675.Bhasker Hariharan
quoting what "rscheff@gmx.at" pointed out over email. "IsLost in RFC3517 is defined as >= (DupThresh * SMSS) while RFC6675 improves upon this, and defines IsLost as > ((DupThresh - 1) * SMSS + 1). The latter addresses situations where partial segments (size < MSS) are sent (eg. last segment of a http protocol message sent with PSH being less than MSS is common)." PiperOrigin-RevId: 231512331 Change-Id: I1addd4a92e3e7baeb0bdda46463ebfae435da958
2019-01-29Fix NIC endpoint forwarding.Ian Gudger
Also adds a test for regular NIC forwarding. PiperOrigin-RevId: 231495279 Change-Id: Ic7edec249568e9ad0280cea77eac14478c9073e1
2019-01-29Use recvmmsg() instead of readv() to read packets from NIC.Bhasker Hariharan
This should reduce the number of syscalls required to process packets significantly and improve throughputs. PiperOrigin-RevId: 231366886 Change-Id: I8b38077262bf9c53176bc4a94b530188d3d7c0ca
2019-01-28Convert TODO into FIXME.Zhaozhong Ni
PiperOrigin-RevId: 231301228 Change-Id: I3e18f3a12a35fb89a22a8c981188268d5887dc61
2019-01-28Fix data race in InodeSimpleAttributes.Unstable.Nicolas Lacasse
We were modifying InodeSimpleAttributes.Unstable.AccessTime without holding the necessary lock. Luckily for us, InodeSimpleAttributes already has a NotifyAccess method that will do the update while holding the lock. In addition, we were holding dfo.dir.mu.Lock while setting AccessTime, which is unnecessary, so that lock has been removed. PiperOrigin-RevId: 231278447 Change-Id: I81ed6d3dbc0b18e3f90c1df5e5a9c06132761769
2019-01-28Drop the one-page limit for /proc/[pid]/{cmdline,environ}.Jamie Liu
It never actually should have applied to environ (the relevant change in Linux 4.2 is c2c0bb44620d "proc: fix PAGE_SIZE limit of /proc/$PID/cmdline"), and we claim to be Linux 4.4 now anyway. PiperOrigin-RevId: 231250661 Change-Id: I37f9c4280a533d1bcb3eebb7803373ac3c7b9f15
2019-01-25Make cacheRemoteRevalidating detect changes to file sizeFabricio Voznika
When file size changes outside the sandbox, page cache was not refreshing file size which is required for cacheRemoteRevalidating. In fact, cacheRemoteRevalidating should be skipping the cache completely since it's not really benefiting from it. The cache is cache is already bypassed for unstable attributes (see cachePolicy.cacheUAttrs). And althought the cache is called to map pages, they will always miss the cache and map directly from the host. Created a HostMappable struct that maps directly to the host and use it for files with cacheRemoteRevalidating. Closes #124 PiperOrigin-RevId: 230998440 Change-Id: Ic5f632eabe33b47241e05e98c95e9b2090ae08fc
2019-01-24cleanup: extract the kernel from contextAdin Scannell
Change-Id: I94704a90beebb53164325e0cce1fcb9a0b97d65c PiperOrigin-RevId: 230817308
2019-01-18Display /proc/net entries for all network configurations.Rahat Mahmood
Most of the entries are stubbed out at the moment, but even those were only displayed if IPv6 support was enabled. The entries should be displayed with IPv4-support only, and with only loopback devices. PiperOrigin-RevId: 229946441 Change-Id: I18afaa3af386322787f91bf9d168ab66c01d5a4c
2019-01-17Allow fsync on a directory.Nicolas Lacasse
PiperOrigin-RevId: 229781337 Change-Id: I1f946cff2771714fb1abd83a83ed454e9febda0a
2019-01-15test: Tag tcp_test as flaky.Kevin Krakauer
PiperOrigin-RevId: 229427852 Change-Id: I9de8ed63f4a7672dacd3b282c863c599d00acd52
2019-01-14Remove fs.Handle, ramfs.Entry, and all the DeprecatedFileOperations.Nicolas Lacasse
More helper structs have been added to the fsutil package to make it easier to implement fs.InodeOperations and fs.FileOperations. PiperOrigin-RevId: 229305982 Change-Id: Ib6f8d3862f4216745116857913dbfa351530223b
2019-01-14netstack: release port inline for listening sockets only.Zhaozhong Ni
PiperOrigin-RevId: 229243918 Change-Id: Ie14ef34e66ae851ed080f57b7d26a369a66f7664
2019-01-11Internal change.Googler
PiperOrigin-RevId: 228979583 Change-Id: I69bd82def48ceb19bc8558c890622b8528d98764
2019-01-10Fixing select call to not enforce RLIMIT_NOFILE.Zach Koopmans
Removing check to RLIMIT_NOFILE in select call. Adding unit test to select suite to document behavior. Moving setrlimit class from mlock to a util file for reuse. Fixing flaky test based on comments from Jamie. PiperOrigin-RevId: 228726131 Change-Id: Ie9dbe970bbf835ba2cca6e17eec7c2ee6fadf459
2019-01-09Minor memevent fixes.Jamie Liu
- Call MemoryEvents.done.Add(1) outside of MemoryEvents.run() so that if MemoryEvents.Stop() => MemoryEvents.done.Wait() is called before the goroutine starts running, it still waits for the goroutine to stop. - Use defer to call MemoryEvents.done.Done() in MemoryEvents.run() so that it's called even if the goroutine panics. PiperOrigin-RevId: 228623307 Change-Id: I1b0459e7999606c1a1a271b16092b1ca87005015
2019-01-09Fix lock order violation.Nicolas Lacasse
overlayFileOperations.Readdir was holding overlay.copyMu while calling DirentReaddir, which then attempts to take take the corresponding Dirent.mu, causing a lock order violation. (See lock order documentation in fs/copy_up.go.) We only actually need to hold copyMu during readdirEntries(), so holding the lock is moved in there, thus avoiding the lock order violation. A new lock was added to protect overlayFileOperations.dirCache. We were inadvertently relying on copyMu to protect this. There is no reason it should not have its own lock. PiperOrigin-RevId: 228542473 Change-Id: I03c3a368c8cbc0b5a79d50cc486fc94adaddc1c2
2019-01-08Allow MSG_OOB and MSG_DONTROUTE to be no-ops on recvmsg(2).Brian Geffon
PiperOrigin-RevId: 228428223 Change-Id: I433ba5ffc15ea4c2706ec944901b8269b1f364f8
2019-01-08Improve loader related error messages returned to users.Brian Geffon
PiperOrigin-RevId: 228382827 Change-Id: Ica1d30e0df826bdd77f180a5092b2b735ea5c804
2019-01-08Grant no initial capabilities to non-root UIDs.Jamie Liu
See modified comment in auth.NewUserCredentials(); compare to the behavior of setresuid(2) as implemented by //pkg/sentry/kernel/task_identity.go:kernel.Task.setKUIDsUncheckedLocked(). PiperOrigin-RevId: 228381765 Change-Id: I45238777c8f63fcf41b99fce3969caaf682fe408
2019-01-08Implement Stringer for tcpip.StatCounterBert Muthalaly
This enables formatting tcpip.Stats readably with %+v. PiperOrigin-RevId: 228379088 Change-Id: I6a9876454a22f151ee752cf94589b4188729458f
2019-01-07Add usermem support for arm64 platform.Jamie Liu
Signed-off-by: Haibo Xu <haibo.xu@arm.com> PiperOrigin-RevId: 228249611 Change-Id: I1046e70bec4274f18b9948eefd6b0d546e4c48bb
2019-01-07Implement /proc/[pid]/smaps.Jamie Liu
PiperOrigin-RevId: 228245523 Change-Id: I5a4d0a6570b93958e51437e917e5331d83e23a7e
2019-01-03Allow creating syserr.Errors at runtime.Ian Gudger
Not allowing this was an oversight. PiperOrigin-RevId: 227757813 Change-Id: I845800ab69028b7320afca36d832c477ff17c5ce
2019-01-03Rename linux.Errno.Error to linux.Errno.String.Ian Gudger
Using linux.Errno as an error doesn't work very well as none of the sentry code expects error to contain a linux.Errno. This moves using syserr.Error.ToLinux as an error in a syscall handler from a runtime error to a compile error. PiperOrigin-RevId: 227744312 Change-Id: Iea63108a5b198296c908614e09c01733dd684da0
2019-01-02Add /proc/net/psched contentFabricio Voznika
FIO reads this file and expects it to be well formed. PiperOrigin-RevId: 227554483 Change-Id: Ia48ae2377626dd6a2daf17b5b4f5119f90ece55b
2018-12-28Implement SO_REUSEPORT for TCP and UDP socketsAndrei Vagin
This option allows multiple sockets to be bound to the same port. Incoming packets are distributed to sockets using a hash based on source and destination addresses. This means that all packets from one sender will be received by the same server socket. PiperOrigin-RevId: 227153413 Change-Id: I59b6edda9c2209d5b8968671e9129adb675920cf
2018-12-27Fix deadlock between epoll_wait and getdentsFabricio Voznika
epoll_wait acquires EventPoll.listsMu (in EventPoll.ReadEvents) and then calls Inotify.Readiness which tries to acquire Inotify.evMu. getdents acquires Inotify.evMu (in Inotify.queueEvent) and then calls readyCallback.Callback which tries to acquire EventPoll.listsMu. The fix is to release Inotify.evMu before calling Queue.Notify. Queue is thread-safe and doesn't require Inotify.evMu to be held. Closes #121 PiperOrigin-RevId: 227066695 Change-Id: Id29364bb940d1727f33a5dff9a3c52f390c15761
2018-12-26Plumb IP_MULTICAST_TTL to netstack.Ian Gudger
PiperOrigin-RevId: 226993086 Change-Id: I71757f231436538081d494da32ca69f709bc71c7
2018-12-26Add EventChannel messages for uncaught signals.Brian Geffon
PiperOrigin-RevId: 226936778 Change-Id: I2a6dda157c55d39d81e1b543ab11a58a0bfe5c05
2018-12-21Stub out SO_OOBINLINE.Ian Gudger
We don't explicitly support out-of-band data and treat it like normal in-band data. This is equilivent to SO_OOBINLINE being enabled, so always report that it is enabled. PiperOrigin-RevId: 226572742 Change-Id: I4c30ccb83265e76c30dea631cbf86822e6ee1c1b
2018-12-21Internal ChangeMichael Pratt
PiperOrigin-RevId: 226542979 Change-Id: Ife11ebd0a85b8a63078e6daa71b4a99a82080ac9
2018-12-21Implement SO_KEEPALIVE, TCP_KEEPIDLE, and TCP_KEEPINTVL.Ian Gudger
Within gVisor, plumb new socket options to netstack. Within netstack, fix GetSockOpt and SetSockOpt return value logic. PiperOrigin-RevId: 226532229 Change-Id: If40734e119eed633335f40b4c26facbebc791c74
2018-12-21inotify notifies watchers when control events bit are setFabricio Voznika
The code that matches the event being published with events watchers was wronly matching all watchers in case any of the control event bits were set. Issue #121 PiperOrigin-RevId: 226521230 Change-Id: Ie2c42bc4366faaf59fbf80a74e9297499bd93f9e
2018-12-21Automated rollback of changelist 226224230Jamie Liu
PiperOrigin-RevId: 226493053 Change-Id: Ia98d1cb6dd0682049e4d907ef69619831de5c34a
2018-12-20Deflake gofer_test.Nicolas Lacasse
We must wait for all lazy resources to be released before closing the rootFile. PiperOrigin-RevId: 226419499 Change-Id: I1d4d961a92b3816e02690cf3eaf0a88944d730cc
2018-12-20Make read and write respect SO_RCVTIMEO and SO_SNDTIMEOIan Gudger
PiperOrigin-RevId: 226387521 Change-Id: I0579ab262320fde6c72d2994dd38437f01a99ea5
2018-12-20Rename limits.MemoryPagesLocked to limits.MemoryLocked.Jamie Liu
"RLIMIT_MEMLOCK: This is the maximum number of bytes of memory that may be locked into RAM." - getrlimit(2) PiperOrigin-RevId: 226384346 Change-Id: Iefac4a1bb69f7714dc813b5b871226a8344dc800
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