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2018-06-19Epsocket has incorrect recv(2) behavior after SHUT_RD.Brian Geffon
After shutdown(SHUT_RD) calls to recv /w MSG_DONTWAIT or with O_NONBLOCK should result in a EAGAIN and not 0. Blocking sockets should return 0 as they would have otherwise blocked indefinitely. PiperOrigin-RevId: 201271123 Change-Id: If589b69c17fa5b9ff05bcf9e44024da9588c8876
2018-06-19runsc: Whitelist lstat, as it is now used in specutils.Kevin Krakauer
When running multi-container, child containers are added after the filters have been installed. Thus, lstat must be in the set of allowed syscalls. PiperOrigin-RevId: 201269550 Change-Id: I03f2e6675a53d462ed12a0f651c10049b76d4c52
2018-06-19state: pretty-print primitive type arrays.Zhaozhong Ni
PiperOrigin-RevId: 201269072 Change-Id: Ia542c5a42b5b5d21c1104a003ddff5279644d309
2018-06-19runsc: Fix flakey container_test.Kevin Krakauer
Verified that this is no longer flakey over 10K repetitions. PiperOrigin-RevId: 201267499 Change-Id: I793c916fe725412aec25953f764cb4f52c9fbed3
2018-06-19Make KVM more scalable by removing CPU cap.Adin Scannell
Instead, CPUs will be created dynamically. We also allow a relatively efficient mechanism for stealing and notifying when a vCPU becomes available via unlock. Since the number of vCPUs is no longer fixed at machine creation time, we make the dirtySet packing more efficient. This has the pleasant side effect of cutting out the unsafe address space code. PiperOrigin-RevId: 201266691 Change-Id: I275c73525a4f38e3714b9ac0fd88731c26adfe66
2018-06-19sentry: futex S/R optimization.Zhaozhong Ni
No need to save thousands of zerovalue buckets. PiperOrigin-RevId: 201258598 Change-Id: I5d3ea7b6a5345117ab4f610332d5288ca550be33
2018-06-19Added a resume command to unpause a paused container.Justine Olshan
Resume checks the status of the container and unpauses the kernel if its status is paused. Otherwise nothing happens. Tests were added to ensure that the process is in the correct state after various commands. PiperOrigin-RevId: 201251234 Change-Id: Ifd11b336c33b654fea6238738f864fcf2bf81e19
2018-06-19Rpcinet is racy around shutdown flags.Brian Geffon
Correct a data race in rpcinet where a shutdown and recvmsg can race around shutown flags. PiperOrigin-RevId: 201238366 Change-Id: I5eb06df4a2b4eba331eeb5de19076213081d581f
2018-06-19Add a new cache policy FSCACHE_WRITETHROUGH.Nicolas Lacasse
The new policy is identical to FSCACHE (which caches everything in memory), but it also flushes writes to the backing fs agent immediately. All gofer cache policy decisions have been moved into the cachePolicy type. Previously they were sprinkled around the codebase. There are many different things that we cache (page cache, negative dirents, dirent LRU, unstable attrs, readdir results....), and I don't think we should have individual flags to control each of these. Instead, we should have a few high-level cache policies that are consistent and useful to users. This refactoring makes it easy to add more such policies. PiperOrigin-RevId: 201206937 Change-Id: I6e225c382b2e5e1b0ad4ccf8ca229873f4cd389d
2018-06-19state: include I/O and protobuf time in kernel S/R timing stats.Zhaozhong Ni
PiperOrigin-RevId: 201205733 Change-Id: I300307b0668989ba7776ab9e3faee71efdd33f46
2018-06-19Rpcinet needs to track shutdown state for blocking sockets.Brian Geffon
Because rpcinet will emulate a blocking socket backed by an rpc based non-blocking socket. In the event of a shutdown(SHUT_RD) followed by a read a non-blocking socket is allowed to return an EWOULDBLOCK however since a blocking socket knows it cannot receive anymore data it would block indefinitely and in this situation linux returns 0. We have to track this on the rpcinet sentry side so we can emulate that behavior because the remote side has no way to know if the socket is actually blocking within the sentry. PiperOrigin-RevId: 201201618 Change-Id: I4ac3a7b74b5dae471ab97c2e7d33b83f425aedac
2018-06-18Modified boot.go to allow for restores.Justine Olshan
A file descriptor was added as a flag to boot so a state file can restore a container that was checkpointed. PiperOrigin-RevId: 201068699 Change-Id: I18e96069488ffa3add468861397f3877725544aa
2018-06-18Add pointer to dated builds in READMEFabricio Voznika
PiperOrigin-RevId: 201068427 Change-Id: If03c8c22907e6ef623f39c8ae5316fdd76cf80cb
2018-06-18runsc: support symlink to the exec path.Lantao Liu
PiperOrigin-RevId: 201049912 Change-Id: Idd937492217a4c2ca3d59c602e41576a3b203dd9
2018-06-18runsc: support "rw" mount option.Lantao Liu
PiperOrigin-RevId: 201018483 Change-Id: I52fe3d01c83c8a2f0e9275d9d88c37e46fa224a2
2018-06-18Automated rollback of changelist 200770591Fabricio Voznika
PiperOrigin-RevId: 201012131 Change-Id: I5cd69e795555129319eb41135ecf26db9a0b1fcb
2018-06-17Add rpcinet support for control messages.Brian Geffon
Add support for control messages, but at this time the only control message that the sentry will support here is SO_TIMESTAMP. PiperOrigin-RevId: 200922230 Change-Id: I63a852d9305255625d9df1d989bd46a66e93c446
2018-06-15Added code for a pause command for a container process.Justine Olshan
Like runc, the pause command will pause the processes of the given container. It will set that container's status to "paused." A resume command will be be added to unpause and continue running the process. PiperOrigin-RevId: 200789624 Change-Id: I72a5d7813d90ecfc4d01cc252d6018855016b1ea
2018-06-15Replace crypto/rand with internal rand packageMichael Pratt
PiperOrigin-RevId: 200784607 Change-Id: I39aa6ee632936dcbb00fc298adccffa606e9f4c0
2018-06-15runsc: Make gofer logs show up in test output.Kevin Krakauer
PiperOrigin-RevId: 200770591 Change-Id: Ifc096d88615b63135210d93c2b4cee2eaecf1eee
2018-06-15runsc: support /dev bind mount which does not conflict with default /dev mount.Lantao Liu
PiperOrigin-RevId: 200768923 Change-Id: I4b8da10bcac296e8171fe6754abec5aabfec5e65
2018-06-15sentry: do not start delivering external signal immediately.Zhaozhong Ni
PiperOrigin-RevId: 200765756 Change-Id: Ie4266f32e4e977df3925eb29f3fbb756e0337606
2018-06-15FIFOs should support O_TRUNC as a no-op.Brian Geffon
PiperOrigin-RevId: 200759323 Change-Id: I683b2edcc2188304c4ca563e46af457e23625905
2018-06-15runsc/cmd: fix kill signal parsingDmitry Vyukov
Signal is arg 1, not 2. Killing with SIGABRT is useful to get Go traces. Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Change-Id: I0b78e34a9de3fb3385108e26fdb4ff6e9347aeff PiperOrigin-RevId: 200742743
2018-06-15Use notify explicitly on unlock path.Adin Scannell
There are circumstances under which the redpill call will not generate the appropriate action and notification. Replace this call with an explicit notification, which is guaranteed to transition as well as perform the futex wake. PiperOrigin-RevId: 200726934 Change-Id: Ie19e008a6007692dd7335a31a8b59f0af6e54aaa
2018-06-15Set kernel.applicationCores to the number of processor on the hostFabricio Voznika
The right number to use is the number of processors assigned to the cgroup. But until we make the sandbox join the respective cgroup, just use the number of processors on the host. Closes #65, closes #66 PiperOrigin-RevId: 200725483 Change-Id: I34a566b1a872e26c66f56fa6e3100f42aaf802b1
2018-06-15Implement /proc/thread-selfFabricio Voznika
Closes #68 PiperOrigin-RevId: 200725401 Change-Id: I4827009b8aee89d22887c3af67291ccf7058d420
2018-06-15Update contributing guidelines with an example.Adin Scannell
Fixes #69 PiperOrigin-RevId: 200683809 Change-Id: I1312ebb3775d5f9088e9108359c19e2dedbb7b70
2018-06-14Fix typo.Brielle Broder
PiperOrigin-RevId: 200631795 Change-Id: I297fe3e30fb06b04fccd8358c933e45019dcc1fa
2018-06-14Ignore expiration count in kernelCPUClockListener.Notify.Jamie Liu
PiperOrigin-RevId: 200590832 Change-Id: I35b817ecccc9414a742dee4815dfc67d0c7d0496
2018-06-14Add nanosleep filter for Go 1.11 supportMichael Pratt
golang.org/cl/108538 replaces pselect6 with nanosleep in runtime.usleep. Update the filters accordingly. PiperOrigin-RevId: 200574612 Change-Id: Ifb2296fcb3781518fc047aabbbffedb9ae488cd7
2018-06-13Fix reference leak in VDSO validationIan Gudger
PiperOrigin-RevId: 200496070 Change-Id: I33adb717c44e5b4bcadece882be3ab1ee3920556
2018-06-13Fix missing returns in rpcinet.Brian Geffon
PiperOrigin-RevId: 200472634 Change-Id: I3f0fb9e3b2f8616e6aa1569188258f330bf1ed31
2018-06-13Deflake kvm_test.Adin Scannell
PiperOrigin-RevId: 200439846 Change-Id: I9970fe0716cb02f0f41b754891d55db7e0729f56
2018-06-13Fix failure to mount volume that sandbox process has no accessFabricio Voznika
Boot loader tries to stat mount to determine whether it's a file or not. This may file if the sandbox process doesn't have access to the file. Instead, add overlay on top of file, which is better anyway since we don't want to propagate changes to the host. PiperOrigin-RevId: 200411261 Change-Id: I14222410e8bc00ed037b779a1883d503843ffebb
2018-06-13sentry: do not treat all save errors as state file errors.Zhaozhong Ni
PiperOrigin-RevId: 200410220 Change-Id: I6a8745e33be949e335719083501f18b24f6ba471
2018-06-13Log filemem state when panicing due to invalid refcount.Jamie Liu
PiperOrigin-RevId: 200408305 Change-Id: I676ee49ec77697105723577928c7f82088cd378e
2018-06-12Fix reference leak for negative direntsIan Gudger
PiperOrigin-RevId: 200306715 Change-Id: I7c80059c77ebd3d9a5d7d48b05c8e7a597f10850
2018-06-12Rpcinet doensn't handle SO_RCVTIMEO properly.Brian Geffon
Rpcinet already inherits socket.ReceiveTimeout; however, it's never set on setsockopt(2). The value is currently forwarded as an RPC and ignored as all sockets will be non-blocking on the RPC side. PiperOrigin-RevId: 200299260 Change-Id: I6c610ea22c808ff6420c63759dccfaeab17959dd
2018-06-12runsc: do not include sub target if it is not started with '/'.Lantao Liu
PiperOrigin-RevId: 200274828 Change-Id: I956703217df08d8650a881479b7ade8f9f119912
2018-06-12Runsc checkpoint works.Brielle Broder
This is the first iteration of checkpoint that actually saves to a file. Tests for checkpoint are included. Ran into an issue when private unix sockets are enabled. An error message was added for this case and the mutex state was set. PiperOrigin-RevId: 200269470 Change-Id: I28d29a9f92c44bf73dc4a4b12ae0509ee4070e93
2018-06-12Drop MMapOpts.MappingIdentity reference in loader.mapSegment.Jamie Liu
PiperOrigin-RevId: 200261995 Change-Id: I7e460b18ceab2c23096bdeb7416159d6e774aaf7
2018-06-12runsc: enable terminals in the sandbox.Kevin Krakauer
runsc now mounts the devpts filesystem, so you get a real terminal using ssh+sshd. PiperOrigin-RevId: 200244830 Change-Id: If577c805ad0138fda13103210fa47178d8ac6605
2018-06-12Enable debug logging in testsFabricio Voznika
Unit tests call runsc directly now, so all command line arguments are valid. On the other hand, enabling debug in the test binary doesn't affect runsc. It needs to be set in the config. PiperOrigin-RevId: 200237706 Change-Id: I0b5922db17f887f58192dbc2f8dd2fd058b76ec7
2018-06-11Minor ring0 interface cleanup.Adin Scannell
- Remove unused methods. - Provide declaration for asm function. PiperOrigin-RevId: 200146850 Change-Id: Ic455c96ffe0d2e78ef15f824eb65d7de705b054a
2018-06-11Make page tables split-safe.Adin Scannell
In order to minimize the likelihood of exit during page table modifications, make the full set of page table functions split-safe. This is not strictly necessary (and you may still incur splits due to allocations from the allocator pool) but should make retries a very rare occurance. PiperOrigin-RevId: 200146688 Change-Id: I8fa36aa16b807beda2f0b057be60038258e8d597
2018-06-11Handle all exception vectors.Adin Scannell
PiperOrigin-RevId: 200144655 Change-Id: I5a753c74b75007b7714d6fe34aa0d2e845dc5c41
2018-06-11Set CLOEXEC option to socketsFabricio Voznika
hostinet/socket.go: the Sentry doesn't spawn new processes, but it doesn't hurt to protect the socket from leaking. unet/unet.go: should be setting closing on exec. The FD is explicitly donated to children when needed. PiperOrigin-RevId: 200135682 Change-Id: Ia8a45ced1e00a19420c8611b12e7a8ee770f89cb
2018-06-11Rpcinet is incorrectly handling MSG_TRUNC with SOCK_STREAMBrian Geffon
SOCK_STREAM has special behavior with respect to MSG_TRUNC. Specifically, the data isn't actually copied back out to userspace when MSG_TRUNC is provided on a SOCK_STREAM. According to tcp(7): "Since version 2.4, Linux supports the use of MSG_TRUNC in the flags argument of recv(2) (and recvmsg(2)). This flag causes the received bytes of data to be discarded, rather than passed back in a caller-supplied buffer." PiperOrigin-RevId: 200134860 Change-Id: I70f17a5f60ffe7794c3f0cfafd131c069202e90d
2018-06-11rpcinet is treating EAGAIN and EWOULDBLOCK as different errnos.Brian Geffon
PiperOrigin-RevId: 200124614 Change-Id: I38a7b083f1464a2a586fe24db648e624c455fec5
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