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authorkevin.xu <cming.xu@gmail.com>2020-04-27 21:51:31 +0800
committerGitHub <noreply@github.com>2020-04-27 21:51:31 +0800
commite896ca54db67524afc20b644d43c72185e72dc0e (patch)
tree2a16f3a62a5cafd098f1f028c621f1b655589d69 /pkg/flipcall
parent1f19624fa127d7d59cabe29593cc80b7fe6c81f8 (diff)
parent3c67754663f424f2ebbc0ff2a4c80e30618d5355 (diff)
Merge pull request #1 from google/master
catch up
Diffstat (limited to 'pkg/flipcall')
-rw-r--r--pkg/flipcall/BUILD11
-rw-r--r--pkg/flipcall/ctrl_futex.go2
-rw-r--r--pkg/flipcall/flipcall.go10
-rw-r--r--pkg/flipcall/flipcall_example_test.go3
-rw-r--r--pkg/flipcall/flipcall_test.go3
-rw-r--r--pkg/flipcall/flipcall_unsafe.go10
-rw-r--r--pkg/flipcall/futex_linux.go6
-rw-r--r--pkg/flipcall/packet_window_allocator.go4
8 files changed, 26 insertions, 23 deletions
diff --git a/pkg/flipcall/BUILD b/pkg/flipcall/BUILD
index 5643d5f26..9c5ad500b 100644
--- a/pkg/flipcall/BUILD
+++ b/pkg/flipcall/BUILD
@@ -1,7 +1,6 @@
-load("//tools/go_stateify:defs.bzl", "go_library")
-load("@io_bazel_rules_go//go:def.bzl", "go_test")
+load("//tools:defs.bzl", "go_library", "go_test")
-package(licenses = ["notice"])
+licenses(["notice"])
go_library(
name = "flipcall",
@@ -13,13 +12,12 @@ go_library(
"io.go",
"packet_window_allocator.go",
],
- importpath = "gvisor.dev/gvisor/pkg/flipcall",
visibility = ["//visibility:public"],
deps = [
"//pkg/abi/linux",
"//pkg/log",
"//pkg/memutil",
- "//third_party/gvsync",
+ "//pkg/sync",
],
)
@@ -30,5 +28,6 @@ go_test(
"flipcall_example_test.go",
"flipcall_test.go",
],
- embed = [":flipcall"],
+ library = ":flipcall",
+ deps = ["//pkg/sync"],
)
diff --git a/pkg/flipcall/ctrl_futex.go b/pkg/flipcall/ctrl_futex.go
index 8390915a2..e7c3a3a0b 100644
--- a/pkg/flipcall/ctrl_futex.go
+++ b/pkg/flipcall/ctrl_futex.go
@@ -113,7 +113,7 @@ func (ep *Endpoint) enterFutexWait() error {
return nil
case epsBlocked | epsShutdown:
atomic.AddInt32(&ep.ctrl.state, -epsBlocked)
- return shutdownError{}
+ return ShutdownError{}
default:
// Most likely due to ep.enterFutexWait() being called concurrently
// from multiple goroutines.
diff --git a/pkg/flipcall/flipcall.go b/pkg/flipcall/flipcall.go
index 386cee42c..3cdb576e1 100644
--- a/pkg/flipcall/flipcall.go
+++ b/pkg/flipcall/flipcall.go
@@ -136,8 +136,8 @@ func (ep *Endpoint) unmapPacket() {
// Shutdown causes concurrent and future calls to ep.Connect(), ep.SendRecv(),
// ep.RecvFirst(), and ep.SendLast(), as well as the same calls in the peer
-// Endpoint, to unblock and return errors. It does not wait for concurrent
-// calls to return. Successive calls to Shutdown have no effect.
+// Endpoint, to unblock and return ShutdownErrors. It does not wait for
+// concurrent calls to return. Successive calls to Shutdown have no effect.
//
// Shutdown is the only Endpoint method that may be called concurrently with
// other methods on the same Endpoint.
@@ -154,10 +154,12 @@ func (ep *Endpoint) isShutdownLocally() bool {
return atomic.LoadUint32(&ep.shutdown) != 0
}
-type shutdownError struct{}
+// ShutdownError is returned by most Endpoint methods after Endpoint.Shutdown()
+// has been called.
+type ShutdownError struct{}
// Error implements error.Error.
-func (shutdownError) Error() string {
+func (ShutdownError) Error() string {
return "flipcall connection shutdown"
}
diff --git a/pkg/flipcall/flipcall_example_test.go b/pkg/flipcall/flipcall_example_test.go
index 8d88b845d..2e28a149a 100644
--- a/pkg/flipcall/flipcall_example_test.go
+++ b/pkg/flipcall/flipcall_example_test.go
@@ -17,7 +17,8 @@ package flipcall
import (
"bytes"
"fmt"
- "sync"
+
+ "gvisor.dev/gvisor/pkg/sync"
)
func Example() {
diff --git a/pkg/flipcall/flipcall_test.go b/pkg/flipcall/flipcall_test.go
index 168a487ec..33fd55a44 100644
--- a/pkg/flipcall/flipcall_test.go
+++ b/pkg/flipcall/flipcall_test.go
@@ -16,9 +16,10 @@ package flipcall
import (
"runtime"
- "sync"
"testing"
"time"
+
+ "gvisor.dev/gvisor/pkg/sync"
)
var testPacketWindowSize = pageSize
diff --git a/pkg/flipcall/flipcall_unsafe.go b/pkg/flipcall/flipcall_unsafe.go
index a37952637..ac974b232 100644
--- a/pkg/flipcall/flipcall_unsafe.go
+++ b/pkg/flipcall/flipcall_unsafe.go
@@ -18,7 +18,7 @@ import (
"reflect"
"unsafe"
- "gvisor.dev/gvisor/third_party/gvsync"
+ "gvisor.dev/gvisor/pkg/sync"
)
// Packets consist of a 16-byte header followed by an arbitrarily-sized
@@ -75,13 +75,13 @@ func (ep *Endpoint) Data() []byte {
var ioSync int64
func raceBecomeActive() {
- if gvsync.RaceEnabled {
- gvsync.RaceAcquire((unsafe.Pointer)(&ioSync))
+ if sync.RaceEnabled {
+ sync.RaceAcquire((unsafe.Pointer)(&ioSync))
}
}
func raceBecomeInactive() {
- if gvsync.RaceEnabled {
- gvsync.RaceReleaseMerge((unsafe.Pointer)(&ioSync))
+ if sync.RaceEnabled {
+ sync.RaceReleaseMerge((unsafe.Pointer)(&ioSync))
}
}
diff --git a/pkg/flipcall/futex_linux.go b/pkg/flipcall/futex_linux.go
index b127a2bbb..168c1ccff 100644
--- a/pkg/flipcall/futex_linux.go
+++ b/pkg/flipcall/futex_linux.go
@@ -61,7 +61,7 @@ func (ep *Endpoint) futexSwitchToPeer() error {
if !atomic.CompareAndSwapUint32(ep.connState(), ep.activeState, ep.inactiveState) {
switch cs := atomic.LoadUint32(ep.connState()); cs {
case csShutdown:
- return shutdownError{}
+ return ShutdownError{}
default:
return fmt.Errorf("unexpected connection state before FUTEX_WAKE: %v", cs)
}
@@ -81,14 +81,14 @@ func (ep *Endpoint) futexSwitchFromPeer() error {
return nil
case ep.inactiveState:
if ep.isShutdownLocally() {
- return shutdownError{}
+ return ShutdownError{}
}
if err := ep.futexWaitConnState(ep.inactiveState); err != nil {
return fmt.Errorf("failed to FUTEX_WAIT for peer Endpoint: %v", err)
}
continue
case csShutdown:
- return shutdownError{}
+ return ShutdownError{}
default:
return fmt.Errorf("unexpected connection state before FUTEX_WAIT: %v", cs)
}
diff --git a/pkg/flipcall/packet_window_allocator.go b/pkg/flipcall/packet_window_allocator.go
index ccb918fab..af9cc3d21 100644
--- a/pkg/flipcall/packet_window_allocator.go
+++ b/pkg/flipcall/packet_window_allocator.go
@@ -134,7 +134,7 @@ func (pwa *PacketWindowAllocator) Allocate(size int) (PacketWindowDescriptor, er
start := pwa.nextAlloc
pwa.nextAlloc = end
return PacketWindowDescriptor{
- FD: pwa.fd,
+ FD: pwa.FD(),
Offset: start,
Length: size,
}, nil
@@ -158,7 +158,7 @@ func (pwa *PacketWindowAllocator) ensureFileSize(min int64) error {
}
newSize = newNewSize
}
- if err := syscall.Ftruncate(pwa.fd, newSize); err != nil {
+ if err := syscall.Ftruncate(pwa.FD(), newSize); err != nil {
return fmt.Errorf("ftruncate failed: %v", err)
}
pwa.fileSize = newSize