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2018-09-13runsc: Support container signal/wait.Lantao Liu
This CL: 1) Fix `runsc wait`, it now also works after the container exits; 2) Generate correct container state in Load; 2) Make sure `Destory` cleanup everything before successfully return. PiperOrigin-RevId: 212900107 Change-Id: Ie129cbb9d74f8151a18364f1fc0b2603eac4109a
2018-09-13Extend memory usage events to report mapped memory usage.Rahat Mahmood
PiperOrigin-RevId: 212887555 Change-Id: I3545383ce903cbe9f00d9b5288d9ef9a049b9f4f
2018-09-13Format struct itimerspecMichael Pratt
PiperOrigin-RevId: 212874745 Change-Id: I0c3e8e6a9e8976631cee03bf0b8891b336ddb8c8
2018-09-13initArgs must hold a reference on the Root if it is not nil.Nicolas Lacasse
The contract in ExecArgs says that a reference on ExecArgs.Root must be held for the lifetime of the struct, but the caller is free to drop the ref after that. As a result, proc.Exec must take an additional ref on Root when it constructs the CreateProcessArgs, since that holds a pointer to Root as well. That ref is dropped in CreateProcess. PiperOrigin-RevId: 212828348 Change-Id: I7f44a612f337ff51a02b873b8a845d3119408707
2018-09-12Always pass buffer.VectorisedView by valueTamir Duberstein
PiperOrigin-RevId: 212757571 Change-Id: I04200df9e45c21eb64951cd2802532fa84afcb1a
2018-09-12Add multicast supportTamir Duberstein
PiperOrigin-RevId: 212750821 Change-Id: I822fd63e48c684b45fd91f9ce057867b7eceb792
2018-09-12compressio: stop worker-pool reference / dependency loop.Zhaozhong Ni
PiperOrigin-RevId: 212732300 Change-Id: I9a0b9b7c28e7b7439d34656dd4f2f6114d173e22
2018-09-12runsc: Add exec flag that specifies where to save the sandbox-internal pid.Kevin Krakauer
This is different from the existing -pid-file flag, which saves a host pid. PiperOrigin-RevId: 212713968 Change-Id: I2c486de8dd5cfd9b923fb0970165ef7c5fc597f0
2018-09-12Remove getdents from filtersMichael Pratt
It was only used by whitelistfs, which was removed in bc81f3fe4a042a15343d2eab44da32d818ac1ade. PiperOrigin-RevId: 212666374 Change-Id: Ia35e6dc9d68c1a3b015d5b5f71ea3e68e46c5bed
2018-09-12Prevent UDP sockets from binding to bound portsTamir Duberstein
PiperOrigin-RevId: 212653818 Change-Id: Ib4e1d754d9cdddeaa428a066cb675e6ec44d91ad
2018-09-11Rollback of changelist 212483372Michael Pratt
PiperOrigin-RevId: 212557844 Change-Id: I414de848e75d57ecee2c05e851d05b607db4aa57
2018-09-11platform: Pass device fd into platform constructor.Nicolas Lacasse
We were previously openining the platform device (i.e. /dev/kvm) inside the platfrom constructor (i.e. kvm.New). This requires that we have RW access to the platform device when constructing the platform. However, now that the runsc sandbox process runs as user "nobody", it is not able to open the platform device. This CL changes the kvm constructor to take the platform device FD, rather than opening the device file itself. The device file is opened outside of the sandbox and passed to the sandbox process. PiperOrigin-RevId: 212505804 Change-Id: I427e1d9de5eb84c84f19d513356e1bb148a52910
2018-09-11Allow fstatat back in syscall filtersFabricio Voznika
PiperOrigin-RevId: 212483372 Change-Id: If95f32a8e41126cf3dc8bd6c8b2fb0fcfefedc6d
2018-09-10Map committed chunks concurrently in FileMem.LoadFrom.Jamie Liu
PiperOrigin-RevId: 212345401 Change-Id: Iac626ee87ba312df88ab1019ade6ecd62c04c75c
2018-09-10Allow '/dev/zero' to be mapped with unaligned lengthFabricio Voznika
PiperOrigin-RevId: 212321271 Change-Id: I79d71c2e6f4b8fcd3b9b923fe96c2256755f4c48
2018-09-10Simplify some code in VectorisedView#ToView.Bert Muthalaly
PiperOrigin-RevId: 212317717 Change-Id: Ic77449c53bf2f8be92c9f0a7a726c45bd35ec435
2018-09-10runsc: Chmod all mounted files to 777 inside chroot.Nicolas Lacasse
Inside the chroot, we run as user nobody, so all mounted files and directories must be accessible to all users. PiperOrigin-RevId: 212284805 Change-Id: I705e0dbbf15e01e04e0c7f378a99daffe6866807
2018-09-07Automated rollback of changelist 212059579Nicolas Lacasse
PiperOrigin-RevId: 212069131 Change-Id: I01476f957bbf29d4ee5a3c11d59d4f863ba9f2df
2018-09-07Update cleanup TODOMichael Pratt
PiperOrigin-RevId: 212068327 Change-Id: I3f360cdf7d6caa1c96fae68ae3a1caaf440f0cbe
2018-09-07Automated rollback of changelist 211992321Nicolas Lacasse
PiperOrigin-RevId: 212066419 Change-Id: Icded56e7e117bfd9b644e6541bddcd110460a9b8
2018-09-07runsc: Support multi-container exec.Nicolas Lacasse
We must use a context.Context with a Root Dirent that corresponds to the container's chroot. Previously we were using the root context, which does not have a chroot. Getting the correct context required refactoring some of the path-lookup code. We can't lookup the path without a context.Context, which requires kernel.CreateProcArgs, which we only get inside control.Execute. So we have to do the path lookup much later than we previously were. PiperOrigin-RevId: 212064734 Change-Id: I84a5cfadacb21fd9c3ab9c393f7e308a40b9b537
2018-09-07Disable test until we figure out what's brokenFabricio Voznika
PiperOrigin-RevId: 212059579 Change-Id: I052c2192d3483d7bd0fd2232ef2023a12da66446
2018-09-07Add 'Starting gVisor...' message to syslogFabricio Voznika
This allows applications to verify they are running with gVisor. It also helps debugging when running with a mix of container runtimes. Closes #54 PiperOrigin-RevId: 212059457 Change-Id: I51d9595ee742b58c1f83f3902ab2e2ecbd5cedec
2018-09-07Add additional sanity checks for walk.Adin Scannell
PiperOrigin-RevId: 212058684 Change-Id: I319709b9ffcfccb3231bac98df345d2a20eca24b
2018-09-07Only start signal forwarding after init process is createdFabricio Voznika
PiperOrigin-RevId: 212028121 Change-Id: If9c2c62f3be103e2bb556b8d154c169888e34369
2018-09-07Remove '--file-access=direct' optionFabricio Voznika
It was used before gofer was implemented and it's not supported anymore. BREAKING CHANGE: proxy-shared and proxy-exclusive options are now: shared and exclusive. PiperOrigin-RevId: 212017643 Change-Id: If029d4073fe60583e5ca25f98abb2953de0d78fd
2018-09-07Use root abstract socket namespace for execFabricio Voznika
PiperOrigin-RevId: 211999211 Change-Id: I5968dd1a8313d3e49bb6e6614e130107495de41d
2018-09-07Continue handling signals after disabling forwardingMichael Pratt
Before destroying the Kernel, we disable signal forwarding, relinquishing control to the Go runtime. External signals that arrive after disabling forwarding but before the sandbox exits thus may use runtime.raise (i.e., tkill(2)) and violate the syscall filters. Adjust forwardSignals to handle signals received after disabling forwarding the same way they are handled before starting forwarding. i.e., by implementing the standard Go runtime behavior using tgkill(2) instead of tkill(2). This also makes the stop callback block until forwarding actually stops. This isn't required to avoid tkill(2) but is a saner interface. PiperOrigin-RevId: 211995946 Change-Id: I3585841644409260eec23435cf65681ad41f5f03
2018-09-07runsc: Run sandbox process inside minimal chroot.Nicolas Lacasse
We construct a dir with the executable bind-mounted at /exe, and proc mounted at /proc. Runsc now executes the sandbox process inside this chroot, thus limiting access to the host filesystem. The mounts and chroot dir are removed when the sandbox is destroyed. Because this requires bind-mounts, we can only do the chroot if we have CAP_SYS_ADMIN. PiperOrigin-RevId: 211994001 Change-Id: Ia71c515e26085e0b69b833e71691830148bc70d1
2018-09-07runsc: Dup debug log file to stderr, so sentry panics don't get lost.Nicolas Lacasse
Docker and containerd do not expose runsc's stderr, so tracking down sentry panics can be painful. If we have a debug log file, we should send panics (and all stderr data) to the log file. PiperOrigin-RevId: 211992321 Change-Id: I5f0d2f45f35c110a38dab86bafc695aaba42f7a3
2018-09-06createProcessArgs.RootFromContext should return process Root if it exists.Nicolas Lacasse
It was always returning the MountNamespace root, which may be different from the process Root if the process is in a chroot environment. PiperOrigin-RevId: 211862181 Change-Id: I63bfeb610e2b0affa9fdbdd8147eba3c39014480
2018-09-06runsc: do not delete in paused state.Lantao Liu
PiperOrigin-RevId: 211835570 Change-Id: Ied7933732cad5bc60b762e9c964986cb49a8d9b9
2018-09-06Enable network for multi-containerFabricio Voznika
PiperOrigin-RevId: 211834411 Change-Id: I52311a6c5407f984e5069359d9444027084e4d2a
2018-09-06runsc testing: Move TestMultiContainerSignal to multi_container_test.Kevin Krakauer
PiperOrigin-RevId: 211831396 Change-Id: Id67f182cb43dccb696180ec967f5b96176f252e0
2018-09-05runsc: Support runsc kill multi-container.Kevin Krakauer
Now, we can kill individual containers rather than the entire sandbox. PiperOrigin-RevId: 211748106 Change-Id: Ic97e91db33d53782f838338c4a6d0aab7a313ead
2018-09-05Fix race condition introduced in 211135505Tamir Duberstein
Now that it's possible to remove subnets, we must iterate over them with locks held. Also do the removal more efficiently while I'm here. PiperOrigin-RevId: 211737416 Change-Id: I29025ec8b0c3ad11f22d4447e8ad473f1c785463
2018-09-05Use container's capabilities in execFabricio Voznika
When no capabilities are specified in exec, use the container's capabilities to match runc's behavior. PiperOrigin-RevId: 211735186 Change-Id: Icd372ed64410c81144eae94f432dffc9fe3a86ce
2018-09-05Imported FD in exec was leakingFabricio Voznika
Imported file needs to be closed after it's been imported. PiperOrigin-RevId: 211732472 Change-Id: Ia9249210558b77be076bcce465b832a22eed301f
2018-09-05Update {LinkEndpoint,NetworkEndpoint}#WritePacket to take a VectorisedViewBert Muthalaly
Makes it possible to avoid copying or allocating in cases where DeliverNetworkPacket (rx) needs to turn around and call WritePacket (tx) with its VectorisedView. Also removes the restriction on having VectorisedViews with multiple views in the write path. PiperOrigin-RevId: 211728717 Change-Id: Ie03a65ecb4e28bd15ebdb9c69f05eced18fdfcff
2018-09-05Implement Subnet removalTamir Duberstein
This was used to implement https://fuchsia-review.googlesource.com/c/garnet/+/177771. PiperOrigin-RevId: 211725098 Change-Id: Ib0acc7c13430b7341e8e0ec6eb5fc35f5cee5083
2018-09-05Enable constructing a Prependable from a View without allocating.Bert Muthalaly
PiperOrigin-RevId: 211722525 Change-Id: Ie73753fd09d67d6a2ce70cfe2d4ecf7275f09ce0
2018-09-05Enabled bind mounts in sub-containersFabricio Voznika
With multi-gofers, bind mounts in sub-containers should just work. Removed restrictions and added test. There are also a few cleanups along the way, e.g. retry unmounting in case cleanup races with gofer teardown. PiperOrigin-RevId: 211699569 Change-Id: Ic0a69c29d7c31cd7e038909cc686c6ac98703374
2018-09-05Running container should have a valid sandboxFabricio Voznika
PiperOrigin-RevId: 211693868 Change-Id: Iea340dd78bf26ae6409c310b63c17cc611c2055f
2018-09-05Add MADVISE to fsgofer seccomp profileFabricio Voznika
PiperOrigin-RevId: 211686037 Change-Id: I0e776ca760b65ba100e495f471b6e811dbd6590a
2018-09-05Move multi-container test to a single fileFabricio Voznika
PiperOrigin-RevId: 211685288 Change-Id: I7872f2a83fcaaa54f385e6e567af6e72320c5aa0
2018-09-05runsc: Promote getExecutablePathInternal to getExecutablePath.Nicolas Lacasse
Remove GetExecutablePath (the non-internal version). This makes path handling more consistent between exec, root, and child containers. The new getExecutablePath now uses MountNamespace.FindInode, which is more robust than Walking the Dirent tree ourselves. This also removes the last use of lstat(2) in the sentry, so that can be removed from the filters. PiperOrigin-RevId: 211683110 Change-Id: Ic8ec960fc1c267aa7d310b8efe6e900c88a9207a
2018-09-05Implement TCP keepalivesTamir Duberstein
PiperOrigin-RevId: 211670620 Change-Id: Ia8a3d8ae53a7fece1dee08ee9c74964bd7f71bb7
2018-09-05Open(2) isn't honoring O_NOFOLLOWBrian Geffon
PiperOrigin-RevId: 211644897 Change-Id: I882ed827a477d6c03576463ca5bf2d6351892b90
2018-09-04runsc: Run sandbox as user nobody.Nicolas Lacasse
When starting a sandbox without direct file or network access, we create an empty user namespace and run the sandbox in there. However, the root user in that namespace is still mapped to the root user in the parent namespace. This CL maps the "nobody" user from the parent namespace into the child namespace, and runs the sandbox process as user "nobody" inside the new namespace. PiperOrigin-RevId: 211572223 Change-Id: I1b1f9b1a86c0b4e7e5ca7bc93be7d4887678bab6
2018-09-04runsc: Pass log and config files to sandbox process by FD.Nicolas Lacasse
This is a prereq for running the sandbox process as user "nobody", when it may not have permissions to open these files. Instead, we must open then before starting the sandbox process, and pass them by FD. The specutils.ReadSpecFromFile method was fixed to always seek to the beginning of the file before reading. This allows Files from the same FD to be read multiple times, as we do in the boot command when the apply-caps flag is set. Tested with --network=host. PiperOrigin-RevId: 211570647 Change-Id: I685be0a290aa7f70731ebdce82ebc0ebcc9d475c
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