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2019-08-27Mount volumes as super userFabricio Voznika
This used to be the case, but regressed after a recent change. Also made a few fixes around it and clean up the code a bit. Closes #720 PiperOrigin-RevId: 265717496
2019-08-21Use tcpip.Subnet in tcpip.RouteTamir Duberstein
This is the first step in replacing some of the redundant types with the standard library equivalents. PiperOrigin-RevId: 264706552
2019-08-08netstack: Don't start endpoint goroutines too soon on restore.Rahat Mahmood
Endpoint protocol goroutines were previously started as part of loading the endpoint. This is potentially too soon, as resources used by these goroutine may not have been loaded. Protocol goroutines may perform meaningful work as soon as they're started (ex: incoming connect) which can cause them to indirectly access resources that haven't been loaded yet. This CL defers resuming all protocol goroutines until the end of restore. PiperOrigin-RevId: 262409429
2019-08-02Remove stale TODOFabricio Voznika
This was done in commit 04cbb13ce9b151cf906f42e3f18ce3a875f01f63 PiperOrigin-RevId: 261414748
2019-08-02Plumbing for iptables sockopts.Kevin Krakauer
PiperOrigin-RevId: 261413396
2019-08-02Stops container if gofer is killedFabricio Voznika
Each gofer now has a goroutine that polls on the FDs used to communicate with the sandbox. The respective gofer is destroyed if any of the FDs is closed. Closes #601 PiperOrigin-RevId: 261383725
2019-08-02Remove kernel.mounts.Nicolas Lacasse
We can get the mount namespace from the CreateProcessArgs in all cases where we need it. This also gets rid of kernel.Destroy method, since the only thing it was doing was DecRefing the mounts. Removing the need to call kernel.SetRootMountNamespace also allowed for some more simplifications in the container fs setup code. PiperOrigin-RevId: 261357060
2019-07-30Change syscall.POLL to syscall.PPOLL.Haibo Xu
syscall.POLL is not supported on arm64, using syscall.PPOLL to support both the x86 and arm64. refs #63 Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I2c81a063d3ec4e7e6b38fe62f17a0924977f505e COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/543 from xiaobo55x:master ba598263fd3748d1addd48e4194080aa12085164 PiperOrigin-RevId: 260752049
2019-07-26runsc: propagate the alsologtostderr to sub-commandsAndrei Vagin
PiperOrigin-RevId: 260239119
2019-07-26Merge pull request #452 from zhangningdlut:chris_test_pidnsgVisor bot
PiperOrigin-RevId: 260220279
2019-07-25Automated rollback of changelist 255679453Fabricio Voznika
PiperOrigin-RevId: 260047477
2019-07-24Use different pidns among different containerschris.zn
The different containers in a sandbox used only one pid namespace before. This results in that a container can see the processes in another container in the same sandbox. This patch use different pid namespace for different containers. Signed-off-by: chris.zn <chris.zn@antfin.com>
2019-07-23Give each container a distinct MountNamespace.Nicolas Lacasse
This keeps all container filesystem completely separate from eachother (including from the root container filesystem), and allows us to get rid of the "__runsc_containers__" directory. It also simplifies container startup/teardown as we don't have to muck around in the root container's filesystem. PiperOrigin-RevId: 259613346
2019-07-12Take a reference on the already-mounted inode before re-mounting it.Nicolas Lacasse
PiperOrigin-RevId: 257855777
2019-07-08Merge pull request #375 from jmgao:mastergVisor bot
PiperOrigin-RevId: 257041876
2019-07-03Avoid importing platforms from many source filesAndrei Vagin
PiperOrigin-RevId: 256494243
2019-07-02Remove map from fd_map, change to fd_table.Adin Scannell
This renames FDMap to FDTable and drops the kernel.FD type, which had an entire package to itself and didn't serve much use (it was freely cast between types, and served as more of an annoyance than providing any protection.) Based on BenchmarkFDLookupAndDecRef-12, we can expect 5-10 ns per lookup operation, and 10-15 ns per concurrent lookup operation of savings. This also fixes two tangential usage issues with the FDMap. Namely, non-atomic use of NewFDFrom and associated calls to Remove (that are both racy and fail to drop the reference on the underlying file.) PiperOrigin-RevId: 256285890
2019-06-28Add finalizer on AtomicRefCount to check for leaks.Ian Gudger
PiperOrigin-RevId: 255711454
2019-06-28Automated rollback of changelist 255263686Nicolas Lacasse
PiperOrigin-RevId: 255679453
2019-06-28runsc: allow openat for runsc-raceAndrei Vagin
I see that runsc-race is killed by SIGSYS, because openat isn't allowed by seccomp filters: 60052 openat(AT_FDCWD, "/proc/sys/vm/overcommit_memory", O_RDONLY|O_CLOEXEC <unfinished ...> 60052 <... openat resumed> ) = 257 60052 --- SIGSYS {si_signo=SIGSYS, si_code=SYS_SECCOMP, si_call_addr=0xfaacf1, si_syscall=__NR_openat, si_arch=AUDIT_ARCH_X86_64} --- PiperOrigin-RevId: 255640808
2019-06-27Fix various spelling issues in the documentationMichael Pratt
Addresses obvious typos, in the documentation only. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65 PiperOrigin-RevId: 255477779
2019-06-27Cache directory entries in the overlayMichael Pratt
Currently, the overlay dirCache is only used for a single logical use of getdents. i.e., it is discard when the FD is closed or seeked back to the beginning. But the initial work of getting the directory contents can be quite expensive (particularly sorting large directories), so we should keep it as long as possible. This is very similar to the readdirCache in fs/gofer. Since the upper filesystem does not have to allow caching readdir entries, the new CacheReaddir MountSourceOperations method controls this behavior. This caching should be trivially movable to all Inodes if desired, though that adds an additional copy step for non-overlay Inodes. (Overlay Inodes already do the extra copy). PiperOrigin-RevId: 255477592
2019-06-26Preserve permissions when checking lowerFabricio Voznika
The code was wrongly assuming that only read access was required from the lower overlay when checking for permissions. This allowed non-writable files to be writable in the overlay. Fixes #316 PiperOrigin-RevId: 255263686
2019-06-24fsgopher: reopen files via /proc/self/fdAndrei Vagin
When we reopen file by path, we can't be sure that we will open exactly the same file. The file can be deleted and another one with the same name can be created. PiperOrigin-RevId: 254898594
2019-06-24Allow to change logging options using 'runsc debug'Fabricio Voznika
New options are: runsc debug --strace=off|all|function1,function2 runsc debug --log-level=warning|info|debug runsc debug --log-packets=true|false Updates #407 PiperOrigin-RevId: 254843128
2019-06-14Enable Receive Buffer Auto-Tuning for runsc.Bhasker Hariharan
Updates #230 PiperOrigin-RevId: 253225078
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
2019-06-13Update 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
2019-06-13Set the HOME environment variable (fixes #293)Ian Lewis
runsc will now set the HOME environment variable as required by POSIX. The user's home directory is retrieved from the /etc/passwd file located on the container's file system during boot. PiperOrigin-RevId: 253120627
2019-06-13Fix use of "2 ^ 30".Josh Gao
2 ^ 30 is 28, not 1073741824.
2019-06-12gvisor/runsc: apply seccomp filters before parsing a state fileAndrei Vagin
PiperOrigin-RevId: 252869983
2019-06-12Allow 'runsc do' to run without rootFabricio Voznika
'--rootless' flag lets a non-root user execute 'runsc do'. The drawback is that the sandbox and gofer processes will run as root inside a user namespace that is mapped to the caller's user, intead of nobody. And network is defaulted to '--network=host' inside the root network namespace. On the bright side, it's very convenient for testing: runsc --rootless do ls runsc --rootless do curl www.google.com PiperOrigin-RevId: 252840970
2019-06-11Add support to mount pod shared tmpfs mountsFabricio Voznika
Parse annotations containing 'gvisor.dev/spec/mount' that gives hints about how mounts are shared between containers inside a pod. This information can be used to better inform how to mount these volumes inside gVisor. For example, a volume that is shared between containers inside a pod can be bind mounted inside the sandbox, instead of being two independent mounts. For now, this information is used to allow the same tmpfs mounts to be shared between containers which wasn't possible before. PiperOrigin-RevId: 252704037
2019-06-11Use net.HardwareAddr for FDBasedLink.LinkAddressFabricio Voznika
It prints formatted to the log. PiperOrigin-RevId: 252699551
2019-06-07Move //pkg/sentry/memutil to //pkg/memutil.Jamie Liu
PiperOrigin-RevId: 252124156
2019-06-06Implement reclaim-driven MemoryFile eviction.Jamie Liu
PiperOrigin-RevId: 251950660
2019-06-06Add multi-fd support to fdbased endpoint.Bhasker Hariharan
This allows an fdbased endpoint to have multiple underlying fd's from which packets can be read and dispatched/written to. This should allow for higher throughput as well as better scalability of the network stack as number of connections increases. Updates #231 PiperOrigin-RevId: 251852825
2019-06-05Shutdown host sockets on internal shutdownMichael Pratt
This is required to make the shutdown visible to peers outside the sandbox. The readClosed / writeClosed fields were dropped, as they were preventing a shutdown socket from reading the remainder of queued bytes. The host syscalls will return the appropriate errors for shutdown. The control message tests have been split out of socket_unix.cc to make the (few) remaining tests accessible to testing inherited host UDS, which don't support sending control messages. Updates #273 PiperOrigin-RevId: 251763060
2019-06-03Refactor container FS setupFabricio Voznika
No change in functionaly. Added containerMounter object to keep state while the mounts are processed. This will help upcoming changes to share mounts per-pod. PiperOrigin-RevId: 251350096
2019-06-03Remove 'clearStatus' option from container.Wait*PID()Fabricio Voznika
clearStatus was added to allow detached execution to wait on the exec'd process and retrieve its exit status. However, it's not currently used. Both docker and gvisor-containerd-shim wait on the "shim" process and retrieve the exit status from there. We could change gvisor-containerd-shim to use waits, but it will end up also consuming a process for the wait, which is similar to having the shim process. Closes #234 PiperOrigin-RevId: 251349490
2019-06-03Remove spurious periodMichael Pratt
PiperOrigin-RevId: 251288885
2019-05-30Add support for collecting execution trace to runsc.Bhasker Hariharan
Updates #220 PiperOrigin-RevId: 250532302
2019-05-23Set sticky bit to /tmpFabricio Voznika
This is generally done for '/tmp' to prevent accidental deletion of files. More details here: http://man7.org/linux/man-pages/man1/chmod.1.html#RESTRICTED_DELETION_FLAG_OR_STICKY_BIT PiperOrigin-RevId: 249633207 Change-Id: I444a5b406fdef664f5677b2f20f374972613a02b
2019-05-23Initial support for bind mountsFabricio Voznika
Separate MountSource from Mount. This is needed to allow mounts to be shared by multiple containers within the same pod. PiperOrigin-RevId: 249617810 Change-Id: Id2944feb7e4194951f355cbe6d4944ae3c02e468
2019-05-15Cleanup around urpc file payload handlingFabricio Voznika
urpc always closes all files once the RPC function returns. PiperOrigin-RevId: 248406857 Change-Id: I400a8562452ec75c8e4bddc2154948567d572950
2019-05-15gvisor/runsc: use a veth link address instead of generating a new oneAndrei Vagin
PiperOrigin-RevId: 248367340 Change-Id: Id792afcfff9c9d2cfd62cae21048316267b4a924
2019-05-09Implement fallocate(2)Fabricio Voznika
Closes #225 PiperOrigin-RevId: 247508791 Change-Id: I04f47cf2770b30043e5a272aba4ba6e11d0476cc
2019-05-03Fix runsc restore to be compatible with docker start --checkpoint ...Andrei Vagin
Change-Id: I02b30de13f1393df66edf8829fedbf32405d18f8 PiperOrigin-RevId: 246621192
2019-04-30Implement async MemoryFile eviction, and use it in CachingInodeOperations.Jamie Liu
This feature allows MemoryFile to delay eviction of "optional" allocations, such as unused cached file pages. Note that this incidentally makes CachingInodeOperations writeback asynchronous, in the sense that it doesn't occur until eviction; this is necessary because between when a cached page becomes evictable and when it's evicted, file writes (via CachingInodeOperations.Write) may dirty the page. As currently implemented, this feature won't meaningfully impact steady-state memory usage or caching; the reclaimer goroutine will schedule eviction as soon as it runs out of other work to do. Future CLs increase caching by adding constraints on when eviction is scheduled. PiperOrigin-RevId: 246014822 Change-Id: Ia85feb25a2de92a48359eb84434b6ec6f9bea2cb
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
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