This also allows the tee(2) implementation to be enabled, since dup can now be
properly supported via WriteTo.
Note that this change necessitated some minor restructoring with the
fs.FileOperations splice methods. If the *fs.File is passed through directly,
then only public API methods are accessible, which will deadlock immediately
since the locking is already done by fs.Splice. Instead, we pass through an
abstract io.Reader or io.Writer, which elide locks and use the underlying
fs.FileOperations directly.
PiperOrigin-RevId: 268805207
Fix a bug where udp.(*endpoint).Disconnect [accessible in gVisor via
epsocket.(*SocketOperations).Connect with AF_UNSPEC] would leak a port
reservation if the socket/endpoint had an ephemeral port assigned to it.
glibc's getaddrinfo uses connect with AF_UNSPEC, causing each call of
getaddrinfo to leak a port. Call getaddrinfo too many times and you run out of
ports (shows up as connect returning EAGAIN and getaddrinfo returning
EAI_NONAME "Name or service not known").
PiperOrigin-RevId: 268071160
This CL implements go_marshal, a code generation utility for
automatically serializing and deserializing ABI structs.
The go_marshal tool automatically generates implementations of the new
marshal interface. Unlike binary.Marshal/Unmarshal, the generated
interface implementations use no runtime reflection, and translates to
a single memcpy for most structs. See go_marshal/README.md for
details.
PiperOrigin-RevId: 268065475
The IPv6 all-nodes multicast address will be joined on NIC enable, and the
appropriate IPv6 solicited-node multicast address will be joined when IPv6
addresses are added.
Tests: Test receiving packets destined to the IPv6 link-local all-nodes
multicast address and the IPv6 solicted node address of an added IPv6 address.
PiperOrigin-RevId: 268047073
Since each Endpoint has a distinct mapping of the packet window, the Go race
detector does not recognize accesses by connected Endpoints to be related. This
means that this change isn't necessary for the Go race detector to accept
accesses of flipcall.Endpoint.Data(), but it *is* necessary for it to accept
accesses to shared variables outside the scope of flipcall that are
synchronized by flipcall.Endpoint state; see updated test for an example.
RaceReleaseMerge is needed (instead of RaceRelease) because calls to
raceBecomeInactive() from *unrelated* Endpoints can occur in any order.
(DowngradableRWMutex.RUnlock() has a similar property: calls to RUnlock() on
the same DowngradableRWMutex from different goroutines can occur in any order.
Remove the TODO asking to explain this now that this is understood.)
PiperOrigin-RevId: 267705325
There are a few cases addressed by this change
- We no longer generate a RST in response to a RST packet.
- When we receive a RST we cleanup and release all reservations immediately as
the connection is now aborted.
- An ACK received by a listening socket generates a RST when SYN cookies are not
in-use. The only reason an ACK should land at the listening socket is if we
are using SYN cookies otherwise the goroutine for the handshake in progress
should have gotten the packet and it should never have arrived at the
listening endpoint.
- Also fixes the error returned when a connection times out due to a
Keepalive timer expiration from ECONNRESET to a ETIMEDOUT.
PiperOrigin-RevId: 267238427
This also renames "subnet" to "addressRange" to avoid any more confusion with
an interface IP's subnet.
Lastly, this also removes the Stack.ContainsSubnet(..) API since it isn't used
by anyone. Plus the same information can be obtained from
Stack.NICAddressRanges().
PiperOrigin-RevId: 267229843
The simple test script has gotten out of control. Shard this script into
different pieces and attempt to impose order on overall test structure. This
change helps lay some of the foundations for future improvements.
* The runsc/test directories are moved into just test/.
* The runsc/test/testutil package is split into logical pieces.
* The scripts/ directory contains new top-level targets.
* Each test is now responsible for building targets it requires.
* The install functionality is moved into `runsc` itself for simplicity.
* The existing kokoro run_tests.sh file now just calls all (can be split).
After this change is merged, I will create multiple distinct workflows for
Kokoro, one for each of the scripts currently targeted by `run_tests.sh` today,
which should dramatically reduce the time-to-run for the Kokoro tests, and
provides a better foundation for further improvements to the infrastructure.
PiperOrigin-RevId: 267081397
Adds support to generate Port Unreachable messages for UDP
datagrams received on a port for which there is no valid
endpoint.
Fixes#703
PiperOrigin-RevId: 267034418
The blockingpoll_unsafe.go was copied to blockingpoll_noyield_unsafe.go
during merging commit 7206202bb9. If it still stay here, it would
cause build errors on non-amd64 platform.
ERROR:
pkg/tcpip/link/rawfile/BUILD:5:1:
GoCompilePkg
pkg/tcpip/link/rawfile.a
failed (Exit 1) builder failed: error executing command
bazel-out/host/bin/external/go_sdk/builder compilepkg -sdk
external/go_sdk -installsuffix linux_arm64 -src
pkg/tcpip/link/rawfile/blockingpoll_noyield_unsafe.go -src ...
(remaining 33 argument(s) skipped)
Use --sandbox_debug to see verbose messages from the sandbox
compilepkg: error running subcommand: exit status 2
pkg/tcpip/link/rawfile/blockingpoll_yield_unsafe.go:35:6:
BlockingPoll redeclared in this block
previous declaration at
pkg/tcpip/link/rawfile/blockingpoll_unsafe.go:26:78
Target //pkg/tcpip/link/rawfile:rawfile failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 25.531s, Critical Path: 21.08s
INFO: 262 processes: 262 linux-sandbox.
FAILED: Build did NOT complete successfully
Signed-off-by: Haibo Xu <haibo.xu@arm.com>
Change-Id: I4e21f82984225d0aa173de456f7a7c66053a053e
Ioctl was returning just the buffer size from epsocket.endpoint
and it was not considering data from epsocket.SocketOperations
that was read from the endpoint, but not yet sent to the caller.
PiperOrigin-RevId: 266485461
This allows the stack to learn remote link addresses on incoming
packets, reducing the need to ARP to send responses.
This also reduces the number of round trips to the system clock,
since that may also prove to be performance-sensitive.
Fixes#739.
PiperOrigin-RevId: 265815816
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
Add missing state transition to LastAck, which should happen when the
endpoint has already recieved a FIN from the remote side, and is
sending its own FIN.
PiperOrigin-RevId: 265568314
This exposes L1, L2, etc. cache sizes, cache line size, etc.
Across S/R, everything except cache line size can differ from the host. This is
because cache line size is critical for correct use of CLFLUSH / CLFLUSHOPT,
but as far as I know, the other cache parameters can only affect performance,
not correctness.
AMD uses different leafs for cache information, which are not yet supported.
fail. There are no known cases of cache line size other than 64 in the fleet.
PiperOrigin-RevId: 265544786
This addresses the problem where an endpoint has its address removed but still
has outstanding references held by routes used in connected TCP/UDP sockets
which prevent the removal of the endpoint.
The fix adds a new "expired" flag to the referenced network endpoint, which is
set when an endpoint has its address removed. Incoming packets are not
delivered to an expired endpoint (unless in promiscuous mode), while sending
outgoing packets triggers an error to the caller (unless in spoofing mode).
In addition, a few helper functions were added to stack_test.go to reduce
code duplications.
PiperOrigin-RevId: 265514326
This fixes the issue of not being able to bind to either a multicast or
broadcast address as well as to send and receive data from it. The way to solve
this is to treat these addresses similar to the ANY address and register their
transport endpoint ID with the global stack's demuxer rather than the NIC's.
That way there is no need to require an endpoint with that multicast or
broadcast address. The stack's demuxer is in fact the only correct one to use,
because neither broadcast- nor multicast-bound sockets care which NIC a
packet was received on (for multicast a join is still needed to receive packets
on a NIC).
I also took the liberty of refactoring udp_test.go to consolidate a lot of
duplicate code and make it easier to create repetitive tests that test the same
feature for a variety of packet and socket types. For this purpose I created a
"flowType" that represents two things: 1) the type of packet being sent or
received and 2) the type of socket used for the test. E.g., a "multicastV4in6"
flow represents a V4-mapped multicast packet run through a V6-dual socket.
This allows writing significantly simpler tests. A nice example is testTTL().
PiperOrigin-RevId: 264766909
Document limitation of no reasonable implementation for RWF_HIPRI
flag (High Priority Read/Write for block-based file systems).
PiperOrigin-RevId: 264237589
We wrongly parses output interface as gateway address.
The fix is straightforward.
Fixes#638
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: Ia4bab31f3c238b0278ea57ab22590fad00eaf061
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/684 from tanjianfeng:fix-638 b940e810367ad1273519bfa594f4371bdd293e83
PiperOrigin-RevId: 264211336
Migrates all (except 3) seqfile implementations to the vfs.DynamicBytesSource
interface. There should not be any change in functionality due to this migration
itself.
Please note that the following seqfile implementations have not been migrated:
- /proc/filesystems in proc/filesystems.go
- /proc/[pid]/mountinfo in proc/mounts.go
- /proc/[pid]/mounts in proc/mounts.go
This is because these depend on pending changes in /pkg/senty/vfs.
PiperOrigin-RevId: 263880719
This adds the same logic to NIC.findEndpoint that is already done in
NIC.getRef. Since this makes the two functions very similar they were combined
into one with the originals being wrappers.
PiperOrigin-RevId: 263864708
Andrei Vagin
Ian Gudger
Adin Scannell
Michael Pratt
Ghanan Gowripalan
Rahat Mahmood
Jamie Liu
Nicolas Lacasse
Bhasker Hariharan
Chris Kuiper
Haibo Xu
Fabricio Voznika
gVisor bot
Tamir Duberstein
praveensastry
Zach Koopmans
Jianfeng Tan
Kevin Krakauer
Ayush Ranjan