It prints sandbox stacks to the log to help debug stuckness. I expect
that many more options will be added in the future.
PiperOrigin-RevId: 201405931
Change-Id: I87e560800cd5a5a7b210dc25a5661363c8c3a16e
Almost all of the hundreds of pending signal queues are empty upon save.
PiperOrigin-RevId: 201380318
Change-Id: I40747072435299de681d646e0862efac0637e172
Containers are created as processes in the sandbox. Of the many things that
don't work yet, the biggest issue is that the fsgofer is launched with its root
as the sandbox's root directory. Thus, when a container is started and wants to
read anything (including the init binary of the container), the gofer tries to
serve from sandbox's root (which basically just has pause), not the container's.
PiperOrigin-RevId: 201294560
Change-Id: I6423aa8830538959c56ae908ce067e4199d627b1
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
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
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
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
Correct a data race in rpcinet where a shutdown and recvmsg can
race around shutown flags.
PiperOrigin-RevId: 201238366
Change-Id: I5eb06df4a2b4eba331eeb5de19076213081d581f
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
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
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
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
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
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
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
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
golang.org/cl/108538 replaces pselect6 with nanosleep in runtime.usleep. Update
the filters accordingly.
PiperOrigin-RevId: 200574612
Change-Id: Ifb2296fcb3781518fc047aabbbffedb9ae488cd7
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
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
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
runsc now mounts the devpts filesystem, so you get a real terminal using
ssh+sshd.
PiperOrigin-RevId: 200244830
Change-Id: If577c805ad0138fda13103210fa47178d8ac6605
Fabricio Voznika
Nicolas Lacasse
Zhaozhong Ni
Kevin Krakauer
Brian Geffon
Adin Scannell
Justine Olshan
Lantao Liu
Michael Pratt
Dmitry Vyukov
Brielle Broder
Jamie Liu
Ian Gudger