diff options
Diffstat (limited to 'pkg/tcpip/link')
41 files changed, 289 insertions, 3228 deletions
diff --git a/pkg/tcpip/link/channel/BUILD b/pkg/tcpip/link/channel/BUILD deleted file mode 100644 index 39ca774ef..000000000 --- a/pkg/tcpip/link/channel/BUILD +++ /dev/null @@ -1,16 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "channel", - srcs = ["channel.go"], - visibility = ["//visibility:public"], - deps = [ - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/channel/channel_state_autogen.go b/pkg/tcpip/link/channel/channel_state_autogen.go new file mode 100644 index 000000000..d00c11cb2 --- /dev/null +++ b/pkg/tcpip/link/channel/channel_state_autogen.go @@ -0,0 +1,34 @@ +// automatically generated by stateify. + +package channel + +import ( + "gvisor.dev/gvisor/pkg/state" +) + +func (x *NotificationHandle) StateTypeName() string { + return "pkg/tcpip/link/channel.NotificationHandle" +} + +func (x *NotificationHandle) StateFields() []string { + return []string{ + "n", + } +} + +func (x *NotificationHandle) beforeSave() {} + +func (x *NotificationHandle) StateSave(m state.Sink) { + x.beforeSave() + m.Save(0, &x.n) +} + +func (x *NotificationHandle) afterLoad() {} + +func (x *NotificationHandle) StateLoad(m state.Source) { + m.Load(0, &x.n) +} + +func init() { + state.Register((*NotificationHandle)(nil)) +} diff --git a/pkg/tcpip/link/fdbased/BUILD b/pkg/tcpip/link/fdbased/BUILD deleted file mode 100644 index 10072eac1..000000000 --- a/pkg/tcpip/link/fdbased/BUILD +++ /dev/null @@ -1,42 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "fdbased", - srcs = [ - "endpoint.go", - "endpoint_unsafe.go", - "mmap.go", - "mmap_stub.go", - "mmap_unsafe.go", - "packet_dispatchers.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/binary", - "//pkg/iovec", - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/rawfile", - "//pkg/tcpip/stack", - "@org_golang_x_sys//unix:go_default_library", - ], -) - -go_test( - name = "fdbased_test", - size = "small", - srcs = ["endpoint_test.go"], - library = ":fdbased", - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/rawfile", - "//pkg/tcpip/stack", - "@com_github_google_go_cmp//cmp:go_default_library", - ], -) diff --git a/pkg/tcpip/link/fdbased/endpoint_test.go b/pkg/tcpip/link/fdbased/endpoint_test.go deleted file mode 100644 index 709f829c8..000000000 --- a/pkg/tcpip/link/fdbased/endpoint_test.go +++ /dev/null @@ -1,609 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build linux - -package fdbased - -import ( - "bytes" - "fmt" - "math/rand" - "reflect" - "syscall" - "testing" - "time" - "unsafe" - - "github.com/google/go-cmp/cmp" - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/buffer" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/link/rawfile" - "gvisor.dev/gvisor/pkg/tcpip/stack" -) - -const ( - mtu = 1500 - laddr = tcpip.LinkAddress("\x11\x22\x33\x44\x55\x66") - raddr = tcpip.LinkAddress("\x77\x88\x99\xaa\xbb\xcc") - proto = 10 - csumOffset = 48 - gsoMSS = 500 -) - -type packetInfo struct { - Raddr tcpip.LinkAddress - Proto tcpip.NetworkProtocolNumber - Contents *stack.PacketBuffer -} - -type packetContents struct { - LinkHeader buffer.View - NetworkHeader buffer.View - TransportHeader buffer.View - Data buffer.View -} - -func checkPacketInfoEqual(t *testing.T, got, want packetInfo) { - t.Helper() - if diff := cmp.Diff( - want, got, - cmp.Transformer("ExtractPacketBuffer", func(pk *stack.PacketBuffer) *packetContents { - if pk == nil { - return nil - } - return &packetContents{ - LinkHeader: pk.LinkHeader().View(), - NetworkHeader: pk.NetworkHeader().View(), - TransportHeader: pk.TransportHeader().View(), - Data: pk.Data.ToView(), - } - }), - ); diff != "" { - t.Errorf("unexpected packetInfo (-want +got):\n%s", diff) - } -} - -type context struct { - t *testing.T - readFDs []int - writeFDs []int - ep stack.LinkEndpoint - ch chan packetInfo - done chan struct{} -} - -func newContext(t *testing.T, opt *Options) *context { - firstFDPair, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_SEQPACKET, 0) - if err != nil { - t.Fatalf("Socketpair failed: %v", err) - } - secondFDPair, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_SEQPACKET, 0) - if err != nil { - t.Fatalf("Socketpair failed: %v", err) - } - - done := make(chan struct{}, 2) - opt.ClosedFunc = func(*tcpip.Error) { - done <- struct{}{} - } - - opt.FDs = []int{firstFDPair[1], secondFDPair[1]} - ep, err := New(opt) - if err != nil { - t.Fatalf("Failed to create FD endpoint: %v", err) - } - - c := &context{ - t: t, - readFDs: []int{firstFDPair[0], secondFDPair[0]}, - writeFDs: opt.FDs, - ep: ep, - ch: make(chan packetInfo, 100), - done: done, - } - - ep.Attach(c) - - return c -} - -func (c *context) cleanup() { - for _, fd := range c.readFDs { - syscall.Close(fd) - } - <-c.done - <-c.done - for _, fd := range c.writeFDs { - syscall.Close(fd) - } -} - -func (c *context) DeliverNetworkPacket(remote tcpip.LinkAddress, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - c.ch <- packetInfo{remote, protocol, pkt} -} - -func (c *context) DeliverOutboundPacket(remote tcpip.LinkAddress, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - panic("unimplemented") -} - -func TestNoEthernetProperties(t *testing.T) { - c := newContext(t, &Options{MTU: mtu}) - defer c.cleanup() - - if want, v := uint16(0), c.ep.MaxHeaderLength(); want != v { - t.Fatalf("MaxHeaderLength() = %v, want %v", v, want) - } - - if want, v := uint32(mtu), c.ep.MTU(); want != v { - t.Fatalf("MTU() = %v, want %v", v, want) - } -} - -func TestEthernetProperties(t *testing.T) { - c := newContext(t, &Options{EthernetHeader: true, MTU: mtu}) - defer c.cleanup() - - if want, v := uint16(header.EthernetMinimumSize), c.ep.MaxHeaderLength(); want != v { - t.Fatalf("MaxHeaderLength() = %v, want %v", v, want) - } - - if want, v := uint32(mtu), c.ep.MTU(); want != v { - t.Fatalf("MTU() = %v, want %v", v, want) - } -} - -func TestAddress(t *testing.T) { - addrs := []tcpip.LinkAddress{"", "abc", "def"} - for _, a := range addrs { - t.Run(fmt.Sprintf("Address: %q", a), func(t *testing.T) { - c := newContext(t, &Options{Address: a, MTU: mtu}) - defer c.cleanup() - - if want, v := a, c.ep.LinkAddress(); want != v { - t.Fatalf("LinkAddress() = %v, want %v", v, want) - } - }) - } -} - -func testWritePacket(t *testing.T, plen int, eth bool, gsoMaxSize uint32, hash uint32) { - c := newContext(t, &Options{Address: laddr, MTU: mtu, EthernetHeader: eth, GSOMaxSize: gsoMaxSize}) - defer c.cleanup() - - r := &stack.Route{ - RemoteLinkAddress: raddr, - } - - // Build payload. - payload := buffer.NewView(plen) - if _, err := rand.Read(payload); err != nil { - t.Fatalf("rand.Read(payload): %s", err) - } - - // Build packet buffer. - const netHdrLen = 100 - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()) + netHdrLen, - Data: payload.ToVectorisedView(), - }) - pkt.Hash = hash - - // Build header. - b := pkt.NetworkHeader().Push(netHdrLen) - if _, err := rand.Read(b); err != nil { - t.Fatalf("rand.Read(b): %s", err) - } - - // Write. - want := append(append(buffer.View(nil), b...), payload...) - var gso *stack.GSO - if gsoMaxSize != 0 { - gso = &stack.GSO{ - Type: stack.GSOTCPv6, - NeedsCsum: true, - CsumOffset: csumOffset, - MSS: gsoMSS, - MaxSize: gsoMaxSize, - L3HdrLen: header.IPv4MaximumHeaderSize, - } - } - if err := c.ep.WritePacket(r, gso, proto, pkt); err != nil { - t.Fatalf("WritePacket failed: %v", err) - } - - // Read from the corresponding FD, then compare with what we wrote. - b = make([]byte, mtu) - fd := c.readFDs[hash%uint32(len(c.readFDs))] - n, err := syscall.Read(fd, b) - if err != nil { - t.Fatalf("Read failed: %v", err) - } - b = b[:n] - if gsoMaxSize != 0 { - vnetHdr := *(*virtioNetHdr)(unsafe.Pointer(&b[0])) - if vnetHdr.flags&_VIRTIO_NET_HDR_F_NEEDS_CSUM == 0 { - t.Fatalf("virtioNetHdr.flags %v doesn't contain %v", vnetHdr.flags, _VIRTIO_NET_HDR_F_NEEDS_CSUM) - } - csumStart := header.EthernetMinimumSize + gso.L3HdrLen - if vnetHdr.csumStart != csumStart { - t.Fatalf("vnetHdr.csumStart = %v, want %v", vnetHdr.csumStart, csumStart) - } - if vnetHdr.csumOffset != csumOffset { - t.Fatalf("vnetHdr.csumOffset = %v, want %v", vnetHdr.csumOffset, csumOffset) - } - gsoType := uint8(0) - if int(gso.MSS) < plen { - gsoType = _VIRTIO_NET_HDR_GSO_TCPV6 - } - if vnetHdr.gsoType != gsoType { - t.Fatalf("vnetHdr.gsoType = %v, want %v", vnetHdr.gsoType, gsoType) - } - b = b[virtioNetHdrSize:] - } - if eth { - h := header.Ethernet(b) - b = b[header.EthernetMinimumSize:] - - if a := h.SourceAddress(); a != laddr { - t.Fatalf("SourceAddress() = %v, want %v", a, laddr) - } - - if a := h.DestinationAddress(); a != raddr { - t.Fatalf("DestinationAddress() = %v, want %v", a, raddr) - } - - if et := h.Type(); et != proto { - t.Fatalf("Type() = %v, want %v", et, proto) - } - } - if len(b) != len(want) { - t.Fatalf("Read returned %v bytes, want %v", len(b), len(want)) - } - if !bytes.Equal(b, want) { - t.Fatalf("Read returned %x, want %x", b, want) - } -} - -func TestWritePacket(t *testing.T) { - lengths := []int{0, 100, 1000} - eths := []bool{true, false} - gsos := []uint32{0, 32768} - - for _, eth := range eths { - for _, plen := range lengths { - for _, gso := range gsos { - t.Run( - fmt.Sprintf("Eth=%v,PayloadLen=%v,GSOMaxSize=%v", eth, plen, gso), - func(t *testing.T) { - testWritePacket(t, plen, eth, gso, 0) - }, - ) - } - } - } -} - -func TestHashedWritePacket(t *testing.T) { - lengths := []int{0, 100, 1000} - eths := []bool{true, false} - gsos := []uint32{0, 32768} - hashes := []uint32{0, 1} - for _, eth := range eths { - for _, plen := range lengths { - for _, gso := range gsos { - for _, hash := range hashes { - t.Run( - fmt.Sprintf("Eth=%v,PayloadLen=%v,GSOMaxSize=%v,Hash=%d", eth, plen, gso, hash), - func(t *testing.T) { - testWritePacket(t, plen, eth, gso, hash) - }, - ) - } - } - } - } -} - -func TestPreserveSrcAddress(t *testing.T) { - baddr := tcpip.LinkAddress("\xcc\xbb\xaa\x77\x88\x99") - - c := newContext(t, &Options{Address: laddr, MTU: mtu, EthernetHeader: true}) - defer c.cleanup() - - // Set LocalLinkAddress in route to the value of the bridged address. - r := &stack.Route{ - RemoteLinkAddress: raddr, - LocalLinkAddress: baddr, - } - - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - // WritePacket panics given a prependable with anything less than - // the minimum size of the ethernet header. - // TODO(b/153685824): Figure out if this should use c.ep.MaxHeaderLength(). - ReserveHeaderBytes: header.EthernetMinimumSize, - Data: buffer.VectorisedView{}, - }) - if err := c.ep.WritePacket(r, nil /* gso */, proto, pkt); err != nil { - t.Fatalf("WritePacket failed: %v", err) - } - - // Read from the FD, then compare with what we wrote. - b := make([]byte, mtu) - n, err := syscall.Read(c.readFDs[0], b) - if err != nil { - t.Fatalf("Read failed: %v", err) - } - b = b[:n] - h := header.Ethernet(b) - - if a := h.SourceAddress(); a != baddr { - t.Fatalf("SourceAddress() = %v, want %v", a, baddr) - } -} - -func TestDeliverPacket(t *testing.T) { - lengths := []int{100, 1000} - eths := []bool{true, false} - - for _, eth := range eths { - for _, plen := range lengths { - t.Run(fmt.Sprintf("Eth=%v,PayloadLen=%v", eth, plen), func(t *testing.T) { - c := newContext(t, &Options{Address: laddr, MTU: mtu, EthernetHeader: eth}) - defer c.cleanup() - - // Build packet. - all := make([]byte, plen) - if _, err := rand.Read(all); err != nil { - t.Fatalf("rand.Read(all): %s", err) - } - // Make it look like an IPv4 packet. - all[0] = 0x40 - - wantPkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: header.EthernetMinimumSize, - Data: buffer.NewViewFromBytes(all).ToVectorisedView(), - }) - if eth { - hdr := header.Ethernet(wantPkt.LinkHeader().Push(header.EthernetMinimumSize)) - hdr.Encode(&header.EthernetFields{ - SrcAddr: raddr, - DstAddr: laddr, - Type: proto, - }) - all = append(hdr, all...) - } - - // Write packet via the file descriptor. - if _, err := syscall.Write(c.readFDs[0], all); err != nil { - t.Fatalf("Write failed: %v", err) - } - - // Receive packet through the endpoint. - select { - case pi := <-c.ch: - want := packetInfo{ - Raddr: raddr, - Proto: proto, - Contents: wantPkt, - } - if !eth { - want.Proto = header.IPv4ProtocolNumber - want.Raddr = "" - } - checkPacketInfoEqual(t, pi, want) - case <-time.After(10 * time.Second): - t.Fatalf("Timed out waiting for packet") - } - }) - } - } -} - -func TestBufConfigMaxLength(t *testing.T) { - got := 0 - for _, i := range BufConfig { - got += i - } - want := header.MaxIPPacketSize // maximum TCP packet size - if got < want { - t.Errorf("total buffer size is invalid: got %d, want >= %d", got, want) - } -} - -func TestBufConfigFirst(t *testing.T) { - // The stack assumes that the TCP/IP header is enterily contained in the first view. - // Therefore, the first view needs to be large enough to contain the maximum TCP/IP - // header, which is 120 bytes (60 bytes for IP + 60 bytes for TCP). - want := 120 - got := BufConfig[0] - if got < want { - t.Errorf("first view has an invalid size: got %d, want >= %d", got, want) - } -} - -var capLengthTestCases = []struct { - comment string - config []int - n int - wantUsed int - wantLengths []int -}{ - { - comment: "Single slice", - config: []int{2}, - n: 1, - wantUsed: 1, - wantLengths: []int{1}, - }, - { - comment: "Multiple slices", - config: []int{1, 2}, - n: 2, - wantUsed: 2, - wantLengths: []int{1, 1}, - }, - { - comment: "Entire buffer", - config: []int{1, 2}, - n: 3, - wantUsed: 2, - wantLengths: []int{1, 2}, - }, - { - comment: "Entire buffer but not on the last slice", - config: []int{1, 2, 3}, - n: 3, - wantUsed: 2, - wantLengths: []int{1, 2, 3}, - }, -} - -func TestReadVDispatcherCapLength(t *testing.T) { - for _, c := range capLengthTestCases { - // fd does not matter for this test. - d := readVDispatcher{fd: -1, e: &endpoint{}} - d.views = make([]buffer.View, len(c.config)) - d.iovecs = make([]syscall.Iovec, len(c.config)) - d.allocateViews(c.config) - - used := d.capViews(c.n, c.config) - if used != c.wantUsed { - t.Errorf("Test %q failed when calling capViews(%d, %v). Got %d. Want %d", c.comment, c.n, c.config, used, c.wantUsed) - } - lengths := make([]int, len(d.views)) - for i, v := range d.views { - lengths[i] = len(v) - } - if !reflect.DeepEqual(lengths, c.wantLengths) { - t.Errorf("Test %q failed when calling capViews(%d, %v). Got %v. Want %v", c.comment, c.n, c.config, lengths, c.wantLengths) - } - } -} - -func TestRecvMMsgDispatcherCapLength(t *testing.T) { - for _, c := range capLengthTestCases { - d := recvMMsgDispatcher{ - fd: -1, // fd does not matter for this test. - e: &endpoint{}, - views: make([][]buffer.View, 1), - iovecs: make([][]syscall.Iovec, 1), - msgHdrs: make([]rawfile.MMsgHdr, 1), - } - - for i, _ := range d.views { - d.views[i] = make([]buffer.View, len(c.config)) - } - for i := range d.iovecs { - d.iovecs[i] = make([]syscall.Iovec, len(c.config)) - } - for k, msgHdr := range d.msgHdrs { - msgHdr.Msg.Iov = &d.iovecs[k][0] - msgHdr.Msg.Iovlen = uint64(len(c.config)) - } - - d.allocateViews(c.config) - - used := d.capViews(0, c.n, c.config) - if used != c.wantUsed { - t.Errorf("Test %q failed when calling capViews(%d, %v). Got %d. Want %d", c.comment, c.n, c.config, used, c.wantUsed) - } - lengths := make([]int, len(d.views[0])) - for i, v := range d.views[0] { - lengths[i] = len(v) - } - if !reflect.DeepEqual(lengths, c.wantLengths) { - t.Errorf("Test %q failed when calling capViews(%d, %v). Got %v. Want %v", c.comment, c.n, c.config, lengths, c.wantLengths) - } - - } -} - -// fakeNetworkDispatcher delivers packets to pkts. -type fakeNetworkDispatcher struct { - pkts []*stack.PacketBuffer -} - -func (d *fakeNetworkDispatcher) DeliverNetworkPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - d.pkts = append(d.pkts, pkt) -} - -func (d *fakeNetworkDispatcher) DeliverOutboundPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - panic("unimplemented") -} - -func TestDispatchPacketFormat(t *testing.T) { - for _, test := range []struct { - name string - newDispatcher func(fd int, e *endpoint) (linkDispatcher, error) - }{ - { - name: "readVDispatcher", - newDispatcher: newReadVDispatcher, - }, - { - name: "recvMMsgDispatcher", - newDispatcher: newRecvMMsgDispatcher, - }, - } { - t.Run(test.name, func(t *testing.T) { - // Create a socket pair to send/recv. - fds, err := syscall.Socketpair(syscall.AF_UNIX, syscall.SOCK_DGRAM, 0) - if err != nil { - t.Fatal(err) - } - defer syscall.Close(fds[0]) - defer syscall.Close(fds[1]) - - data := []byte{ - // Ethernet header. - 1, 2, 3, 4, 5, 60, - 1, 2, 3, 4, 5, 61, - 8, 0, - // Mock network header. - 40, 41, 42, 43, - } - err = syscall.Sendmsg(fds[1], data, nil, nil, 0) - if err != nil { - t.Fatal(err) - } - - // Create and run dispatcher once. - sink := &fakeNetworkDispatcher{} - d, err := test.newDispatcher(fds[0], &endpoint{ - hdrSize: header.EthernetMinimumSize, - dispatcher: sink, - }) - if err != nil { - t.Fatal(err) - } - if ok, err := d.dispatch(); !ok || err != nil { - t.Fatalf("d.dispatch() = %v, %v", ok, err) - } - - // Verify packet. - if got, want := len(sink.pkts), 1; got != want { - t.Fatalf("len(sink.pkts) = %d, want %d", got, want) - } - pkt := sink.pkts[0] - if got, want := pkt.LinkHeader().View().Size(), header.EthernetMinimumSize; got != want { - t.Errorf("pkt.LinkHeader().View().Size() = %d, want %d", got, want) - } - if got, want := pkt.Data.Size(), 4; got != want { - t.Errorf("pkt.Data.Size() = %d, want %d", got, want) - } - }) - } -} diff --git a/pkg/tcpip/link/fdbased/fdbased_state_autogen.go b/pkg/tcpip/link/fdbased/fdbased_state_autogen.go new file mode 100644 index 000000000..b84e8f21c --- /dev/null +++ b/pkg/tcpip/link/fdbased/fdbased_state_autogen.go @@ -0,0 +1,8 @@ +// automatically generated by stateify. + +// +build linux +// +build linux,amd64 linux,arm64 +// +build !linux !amd64,!arm64 +// +build linux + +package fdbased diff --git a/pkg/tcpip/link/fdbased/fdbased_unsafe_state_autogen.go b/pkg/tcpip/link/fdbased/fdbased_unsafe_state_autogen.go new file mode 100644 index 000000000..e2ed505b2 --- /dev/null +++ b/pkg/tcpip/link/fdbased/fdbased_unsafe_state_autogen.go @@ -0,0 +1,6 @@ +// automatically generated by stateify. + +// +build linux +// +build linux,amd64 linux,arm64 + +package fdbased diff --git a/pkg/tcpip/link/loopback/BUILD b/pkg/tcpip/link/loopback/BUILD deleted file mode 100644 index 6bf3805b7..000000000 --- a/pkg/tcpip/link/loopback/BUILD +++ /dev/null @@ -1,15 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "loopback", - srcs = ["loopback.go"], - visibility = ["//visibility:public"], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/loopback/loopback_state_autogen.go b/pkg/tcpip/link/loopback/loopback_state_autogen.go new file mode 100644 index 000000000..c00fd9f19 --- /dev/null +++ b/pkg/tcpip/link/loopback/loopback_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package loopback diff --git a/pkg/tcpip/link/muxed/BUILD b/pkg/tcpip/link/muxed/BUILD deleted file mode 100644 index e7493e5c5..000000000 --- a/pkg/tcpip/link/muxed/BUILD +++ /dev/null @@ -1,29 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "muxed", - srcs = ["injectable.go"], - visibility = ["//visibility:public"], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) - -go_test( - name = "muxed_test", - size = "small", - srcs = ["injectable_test.go"], - library = ":muxed", - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/link/fdbased", - "//pkg/tcpip/network/ipv4", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/muxed/injectable_test.go b/pkg/tcpip/link/muxed/injectable_test.go deleted file mode 100644 index 3e4afcdad..000000000 --- a/pkg/tcpip/link/muxed/injectable_test.go +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2019 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package muxed - -import ( - "bytes" - "net" - "os" - "syscall" - "testing" - - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/buffer" - "gvisor.dev/gvisor/pkg/tcpip/link/fdbased" - "gvisor.dev/gvisor/pkg/tcpip/network/ipv4" - "gvisor.dev/gvisor/pkg/tcpip/stack" -) - -func TestInjectableEndpointRawDispatch(t *testing.T) { - endpoint, sock, dstIP := makeTestInjectableEndpoint(t) - - endpoint.InjectOutbound(dstIP, []byte{0xFA}) - - buf := make([]byte, ipv4.MaxTotalSize) - bytesRead, err := sock.Read(buf) - if err != nil { - t.Fatalf("Unable to read from socketpair: %v", err) - } - if got, want := buf[:bytesRead], []byte{0xFA}; !bytes.Equal(got, want) { - t.Fatalf("Read %v from the socketpair, wanted %v", got, want) - } -} - -func TestInjectableEndpointDispatch(t *testing.T) { - endpoint, sock, dstIP := makeTestInjectableEndpoint(t) - - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: 1, - Data: buffer.NewViewFromBytes([]byte{0xFB}).ToVectorisedView(), - }) - pkt.TransportHeader().Push(1)[0] = 0xFA - packetRoute := stack.Route{RemoteAddress: dstIP} - - endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt) - - buf := make([]byte, 6500) - bytesRead, err := sock.Read(buf) - if err != nil { - t.Fatalf("Unable to read from socketpair: %v", err) - } - if got, want := buf[:bytesRead], []byte{0xFA, 0xFB}; !bytes.Equal(got, want) { - t.Fatalf("Read %v from the socketpair, wanted %v", got, want) - } -} - -func TestInjectableEndpointDispatchHdrOnly(t *testing.T) { - endpoint, sock, dstIP := makeTestInjectableEndpoint(t) - - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: 1, - Data: buffer.NewView(0).ToVectorisedView(), - }) - pkt.TransportHeader().Push(1)[0] = 0xFA - packetRoute := stack.Route{RemoteAddress: dstIP} - endpoint.WritePacket(&packetRoute, nil /* gso */, ipv4.ProtocolNumber, pkt) - buf := make([]byte, 6500) - bytesRead, err := sock.Read(buf) - if err != nil { - t.Fatalf("Unable to read from socketpair: %v", err) - } - if got, want := buf[:bytesRead], []byte{0xFA}; !bytes.Equal(got, want) { - t.Fatalf("Read %v from the socketpair, wanted %v", got, want) - } -} - -func makeTestInjectableEndpoint(t *testing.T) (*InjectableEndpoint, *os.File, tcpip.Address) { - dstIP := tcpip.Address(net.ParseIP("1.2.3.4").To4()) - pair, err := syscall.Socketpair(syscall.AF_UNIX, - syscall.SOCK_SEQPACKET|syscall.SOCK_CLOEXEC|syscall.SOCK_NONBLOCK, 0) - if err != nil { - t.Fatal("Failed to create socket pair:", err) - } - underlyingEndpoint := fdbased.NewInjectable(pair[1], 6500, stack.CapabilityNone) - routes := map[tcpip.Address]stack.InjectableLinkEndpoint{dstIP: underlyingEndpoint} - endpoint := NewInjectableEndpoint(routes) - return endpoint, os.NewFile(uintptr(pair[0]), "test route end"), dstIP -} diff --git a/pkg/tcpip/link/muxed/muxed_state_autogen.go b/pkg/tcpip/link/muxed/muxed_state_autogen.go new file mode 100644 index 000000000..56330e2a5 --- /dev/null +++ b/pkg/tcpip/link/muxed/muxed_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package muxed diff --git a/pkg/tcpip/link/nested/BUILD b/pkg/tcpip/link/nested/BUILD deleted file mode 100644 index 2cdb23475..000000000 --- a/pkg/tcpip/link/nested/BUILD +++ /dev/null @@ -1,32 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "nested", - srcs = [ - "nested.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) - -go_test( - name = "nested_test", - size = "small", - srcs = [ - "nested_test.go", - ], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/header", - "//pkg/tcpip/link/nested", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/nested/nested_state_autogen.go b/pkg/tcpip/link/nested/nested_state_autogen.go new file mode 100644 index 000000000..9e1b5ca4e --- /dev/null +++ b/pkg/tcpip/link/nested/nested_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package nested diff --git a/pkg/tcpip/link/nested/nested_test.go b/pkg/tcpip/link/nested/nested_test.go deleted file mode 100644 index c1f9d308c..000000000 --- a/pkg/tcpip/link/nested/nested_test.go +++ /dev/null @@ -1,109 +0,0 @@ -// Copyright 2020 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package nested_test - -import ( - "testing" - - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/link/nested" - "gvisor.dev/gvisor/pkg/tcpip/stack" -) - -type parentEndpoint struct { - nested.Endpoint -} - -var _ stack.LinkEndpoint = (*parentEndpoint)(nil) -var _ stack.NetworkDispatcher = (*parentEndpoint)(nil) - -type childEndpoint struct { - stack.LinkEndpoint - dispatcher stack.NetworkDispatcher -} - -var _ stack.LinkEndpoint = (*childEndpoint)(nil) - -func (c *childEndpoint) Attach(dispatcher stack.NetworkDispatcher) { - c.dispatcher = dispatcher -} - -func (c *childEndpoint) IsAttached() bool { - return c.dispatcher != nil -} - -type counterDispatcher struct { - count int -} - -var _ stack.NetworkDispatcher = (*counterDispatcher)(nil) - -func (d *counterDispatcher) DeliverNetworkPacket(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) { - d.count++ -} - -func (d *counterDispatcher) DeliverOutboundPacket(tcpip.LinkAddress, tcpip.LinkAddress, tcpip.NetworkProtocolNumber, *stack.PacketBuffer) { - panic("unimplemented") -} - -func TestNestedLinkEndpoint(t *testing.T) { - const emptyAddress = tcpip.LinkAddress("") - - var ( - childEP childEndpoint - nestedEP parentEndpoint - disp counterDispatcher - ) - nestedEP.Endpoint.Init(&childEP, &nestedEP) - - if childEP.IsAttached() { - t.Error("On init, childEP.IsAttached() = true, want = false") - } - if nestedEP.IsAttached() { - t.Error("On init, nestedEP.IsAttached() = true, want = false") - } - - nestedEP.Attach(&disp) - if disp.count != 0 { - t.Fatalf("After attach, got disp.count = %d, want = 0", disp.count) - } - if !childEP.IsAttached() { - t.Error("After attach, childEP.IsAttached() = false, want = true") - } - if !nestedEP.IsAttached() { - t.Error("After attach, nestedEP.IsAttached() = false, want = true") - } - - nestedEP.DeliverNetworkPacket(emptyAddress, emptyAddress, header.IPv4ProtocolNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if disp.count != 1 { - t.Errorf("After first packet with dispatcher attached, got disp.count = %d, want = 1", disp.count) - } - - nestedEP.Attach(nil) - if childEP.IsAttached() { - t.Error("After detach, childEP.IsAttached() = true, want = false") - } - if nestedEP.IsAttached() { - t.Error("After detach, nestedEP.IsAttached() = true, want = false") - } - - disp.count = 0 - nestedEP.DeliverNetworkPacket(emptyAddress, emptyAddress, header.IPv4ProtocolNumber, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if disp.count != 0 { - t.Errorf("After second packet with dispatcher detached, got disp.count = %d, want = 0", disp.count) - } - -} diff --git a/pkg/tcpip/link/packetsocket/BUILD b/pkg/tcpip/link/packetsocket/BUILD deleted file mode 100644 index 6fff160ce..000000000 --- a/pkg/tcpip/link/packetsocket/BUILD +++ /dev/null @@ -1,14 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "packetsocket", - srcs = ["endpoint.go"], - visibility = ["//visibility:public"], - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/link/nested", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/packetsocket/packetsocket_state_autogen.go b/pkg/tcpip/link/packetsocket/packetsocket_state_autogen.go new file mode 100644 index 000000000..6b3221fd8 --- /dev/null +++ b/pkg/tcpip/link/packetsocket/packetsocket_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package packetsocket diff --git a/pkg/tcpip/link/qdisc/fifo/BUILD b/pkg/tcpip/link/qdisc/fifo/BUILD deleted file mode 100644 index 1d0079bd6..000000000 --- a/pkg/tcpip/link/qdisc/fifo/BUILD +++ /dev/null @@ -1,20 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "fifo", - srcs = [ - "endpoint.go", - "packet_buffer_queue.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/sleep", - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/qdisc/fifo/fifo_state_autogen.go b/pkg/tcpip/link/qdisc/fifo/fifo_state_autogen.go new file mode 100644 index 000000000..9eb52b1cb --- /dev/null +++ b/pkg/tcpip/link/qdisc/fifo/fifo_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package fifo diff --git a/pkg/tcpip/link/rawfile/BUILD b/pkg/tcpip/link/rawfile/BUILD deleted file mode 100644 index 14b527bc2..000000000 --- a/pkg/tcpip/link/rawfile/BUILD +++ /dev/null @@ -1,20 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "rawfile", - srcs = [ - "blockingpoll_amd64.s", - "blockingpoll_arm64.s", - "blockingpoll_noyield_unsafe.go", - "blockingpoll_yield_unsafe.go", - "errors.go", - "rawfile_unsafe.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/tcpip", - "@org_golang_x_sys//unix:go_default_library", - ], -) diff --git a/pkg/tcpip/link/rawfile/rawfile_state_autogen.go b/pkg/tcpip/link/rawfile/rawfile_state_autogen.go new file mode 100644 index 000000000..338e9679b --- /dev/null +++ b/pkg/tcpip/link/rawfile/rawfile_state_autogen.go @@ -0,0 +1,5 @@ +// automatically generated by stateify. + +// +build linux + +package rawfile diff --git a/pkg/tcpip/link/rawfile/rawfile_unsafe_state_autogen.go b/pkg/tcpip/link/rawfile/rawfile_unsafe_state_autogen.go new file mode 100644 index 000000000..239d165f0 --- /dev/null +++ b/pkg/tcpip/link/rawfile/rawfile_unsafe_state_autogen.go @@ -0,0 +1,9 @@ +// automatically generated by stateify. + +// +build linux,!amd64,!arm64 +// +build linux,amd64 linux,arm64 +// +build go1.12 +// +build !go1.17 +// +build linux + +package rawfile diff --git a/pkg/tcpip/link/sharedmem/BUILD b/pkg/tcpip/link/sharedmem/BUILD deleted file mode 100644 index 13243ebbb..000000000 --- a/pkg/tcpip/link/sharedmem/BUILD +++ /dev/null @@ -1,41 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "sharedmem", - srcs = [ - "rx.go", - "sharedmem.go", - "sharedmem_unsafe.go", - "tx.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/log", - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/rawfile", - "//pkg/tcpip/link/sharedmem/queue", - "//pkg/tcpip/stack", - ], -) - -go_test( - name = "sharedmem_test", - srcs = [ - "sharedmem_test.go", - ], - library = ":sharedmem", - deps = [ - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/sharedmem/pipe", - "//pkg/tcpip/link/sharedmem/queue", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/sharedmem/pipe/BUILD b/pkg/tcpip/link/sharedmem/pipe/BUILD deleted file mode 100644 index 87020ec08..000000000 --- a/pkg/tcpip/link/sharedmem/pipe/BUILD +++ /dev/null @@ -1,23 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "pipe", - srcs = [ - "pipe.go", - "pipe_unsafe.go", - "rx.go", - "tx.go", - ], - visibility = ["//visibility:public"], -) - -go_test( - name = "pipe_test", - srcs = [ - "pipe_test.go", - ], - library = ":pipe", - deps = ["//pkg/sync"], -) diff --git a/pkg/tcpip/link/sharedmem/pipe/pipe_state_autogen.go b/pkg/tcpip/link/sharedmem/pipe/pipe_state_autogen.go new file mode 100644 index 000000000..d3b40feb4 --- /dev/null +++ b/pkg/tcpip/link/sharedmem/pipe/pipe_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package pipe diff --git a/pkg/tcpip/link/sharedmem/pipe/pipe_test.go b/pkg/tcpip/link/sharedmem/pipe/pipe_test.go deleted file mode 100644 index dc239a0d0..000000000 --- a/pkg/tcpip/link/sharedmem/pipe/pipe_test.go +++ /dev/null @@ -1,518 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package pipe - -import ( - "math/rand" - "reflect" - "runtime" - "testing" - - "gvisor.dev/gvisor/pkg/sync" -) - -func TestSimpleReadWrite(t *testing.T) { - // Check that a simple write can be properly read from the rx side. - tr := rand.New(rand.NewSource(99)) - rr := rand.New(rand.NewSource(99)) - - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - wb := tx.Push(10) - if wb == nil { - t.Fatalf("Push failed on empty pipe") - } - for i := range wb { - wb[i] = byte(tr.Intn(256)) - } - tx.Flush() - - var rx Rx - rx.Init(b) - rb := rx.Pull() - if len(rb) != 10 { - t.Fatalf("Bad buffer size returned: got %v, want %v", len(rb), 10) - } - - for i := range rb { - if v := byte(rr.Intn(256)); v != rb[i] { - t.Fatalf("Bad read buffer at index %v: got %v, want %v", i, rb[i], v) - } - } - rx.Flush() -} - -func TestEmptyRead(t *testing.T) { - // Check that pulling from an empty pipe fails. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on empty pipe") - } -} - -func TestTooLargeWrite(t *testing.T) { - // Check that writes that are too large are properly rejected. - b := make([]byte, 96) - var tx Tx - tx.Init(b) - - if wb := tx.Push(96); wb != nil { - t.Fatalf("Write of 96 bytes succeeded on 96-byte pipe") - } - - if wb := tx.Push(88); wb != nil { - t.Fatalf("Write of 88 bytes succeeded on 96-byte pipe") - } - - if wb := tx.Push(80); wb == nil { - t.Fatalf("Write of 80 bytes failed on 96-byte pipe") - } -} - -func TestFullWrite(t *testing.T) { - // Check that writes fail when the pipe is full. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(80); wb == nil { - t.Fatalf("Write of 80 bytes failed on 96-byte pipe") - } - - if wb := tx.Push(1); wb != nil { - t.Fatalf("Write succeeded on full pipe") - } -} - -func TestFullAndFlushedWrite(t *testing.T) { - // Check that writes fail when the pipe is full and has already been - // flushed. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(80); wb == nil { - t.Fatalf("Write of 80 bytes failed on 96-byte pipe") - } - - tx.Flush() - - if wb := tx.Push(1); wb != nil { - t.Fatalf("Write succeeded on full pipe") - } -} - -func TestTxFlushTwice(t *testing.T) { - // Checks that a second consecutive tx flush is a no-op. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - // Make copy of original tx queue, flush it, then check that it didn't - // change. - orig := tx - tx.Flush() - - if !reflect.DeepEqual(orig, tx) { - t.Fatalf("Flush mutated tx pipe: got %v, want %v", tx, orig) - } -} - -func TestRxFlushTwice(t *testing.T) { - // Checks that a second consecutive rx flush is a no-op. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // Make copy of original rx queue, flush it, then check that it didn't - // change. - orig := rx - rx.Flush() - - if !reflect.DeepEqual(orig, rx) { - t.Fatalf("Flush mutated rx pipe: got %v, want %v", rx, orig) - } -} - -func TestWrapInMiddleOfTransaction(t *testing.T) { - // Check that writes are not flushed when we need to wrap the buffer - // around. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // At this point the ring buffer is empty, but the write is at offset - // 64 (50 + sizeOfSlotHeader + padding-for-8-byte-alignment). - if wb := tx.Push(10); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on non-full pipe") - } - - // We haven't flushed yet, so pull must return nil. - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on non-flushed pipe") - } - - tx.Flush() - - // The two buffers must be available now. - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } -} - -func TestWriteAbort(t *testing.T) { - // Check that a read fails on a pipe that has had data pushed to it but - // has aborted the push. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(10); wb == nil { - t.Fatalf("Write failed on empty pipe") - } - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on empty pipe") - } - - tx.Abort() - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on empty pipe") - } -} - -func TestWrappedWriteAbort(t *testing.T) { - // Check that writes are properly aborted even if the writes wrap - // around. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // At this point the ring buffer is empty, but the write is at offset - // 64 (50 + sizeOfSlotHeader + padding-for-8-byte-alignment). - if wb := tx.Push(10); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on non-full pipe") - } - - // We haven't flushed yet, so pull must return nil. - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on non-flushed pipe") - } - - tx.Abort() - - // The pushes were aborted, so no data should be readable. - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on non-flushed pipe") - } - - // Try the same transactions again, but flush this time. - if wb := tx.Push(10); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on non-full pipe") - } - - tx.Flush() - - // The two buffers must be available now. - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } -} - -func TestEmptyReadOnNonFlushedWrite(t *testing.T) { - // Check that a read fails on a pipe that has had data pushed to it - // but not yet flushed. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(10); wb == nil { - t.Fatalf("Write failed on empty pipe") - } - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on empty pipe") - } - - tx.Flush() - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull on failed on non-empty pipe") - } -} - -func TestPullAfterPullingEntirePipe(t *testing.T) { - // Check that Pull fails when the pipe is full, but all of it has - // already been pulled but not yet flushed. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // At this point the ring buffer is empty, but the write is at offset - // 64 (50 + sizeOfSlotHeader + padding-for-8-byte-alignment). Write 3 - // buffers that will fill the pipe. - if wb := tx.Push(10); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - - if wb := tx.Push(20); wb == nil { - t.Fatalf("Push failed on non-full pipe") - } - - if wb := tx.Push(24); wb == nil { - t.Fatalf("Push failed on non-full pipe") - } - - tx.Flush() - - // The three buffers must be available now. - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - - // Fourth pull must fail. - if rb := rx.Pull(); rb != nil { - t.Fatalf("Pull succeeded on empty pipe") - } -} - -func TestNoRoomToWrapOnPush(t *testing.T) { - // Check that Push fails when it tries to allocate room to add a wrap - // message. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - var rx Rx - rx.Init(b) - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // At this point the ring buffer is empty, but the write is at offset - // 64 (50 + sizeOfSlotHeader + padding-for-8-byte-alignment). Write 20, - // which won't fit (64+20+8+padding = 96, which wouldn't leave room for - // the padding), so it wraps around. - if wb := tx.Push(20); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - - tx.Flush() - - // Buffer offset is at 28. Try to write 70, which would require a wrap - // slot which cannot be created now. - if wb := tx.Push(70); wb != nil { - t.Fatalf("Push succeeded on pipe with no room for wrap message") - } -} - -func TestRxImplicitFlushOfWrapMessage(t *testing.T) { - // Check if the first read is that of a wrapping message, that it gets - // immediately flushed. - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - if wb := tx.Push(50); wb == nil { - t.Fatalf("Push failed on empty pipe") - } - tx.Flush() - - // This will cause a wrapping message to written. - if wb := tx.Push(60); wb != nil { - t.Fatalf("Push succeeded when there is no room in pipe") - } - - var rx Rx - rx.Init(b) - - // Read the first message. - if rb := rx.Pull(); rb == nil { - t.Fatalf("Pull failed on non-empty pipe") - } - rx.Flush() - - // This should fail because of the wrapping message is taking up space. - if wb := tx.Push(60); wb != nil { - t.Fatalf("Push succeeded when there is no room in pipe") - } - - // Try to read the next one. This should consume the wrapping message. - rx.Pull() - - // This must now succeed. - if wb := tx.Push(60); wb == nil { - t.Fatalf("Push failed on empty pipe") - } -} - -func TestConcurrentReaderWriter(t *testing.T) { - // Push a million buffers of random sizes and random contents. Check - // that buffers read match what was written. - tr := rand.New(rand.NewSource(99)) - rr := rand.New(rand.NewSource(99)) - - b := make([]byte, 100) - var tx Tx - tx.Init(b) - - var rx Rx - rx.Init(b) - - const count = 1000000 - var wg sync.WaitGroup - wg.Add(1) - go func() { - defer wg.Done() - runtime.Gosched() - for i := 0; i < count; i++ { - n := 1 + tr.Intn(80) - wb := tx.Push(uint64(n)) - for wb == nil { - wb = tx.Push(uint64(n)) - } - - for j := range wb { - wb[j] = byte(tr.Intn(256)) - } - - tx.Flush() - } - }() - - wg.Add(1) - go func() { - defer wg.Done() - runtime.Gosched() - for i := 0; i < count; i++ { - n := 1 + rr.Intn(80) - rb := rx.Pull() - for rb == nil { - rb = rx.Pull() - } - - if n != len(rb) { - t.Fatalf("Bad %v-th buffer length: got %v, want %v", i, len(rb), n) - } - - for j := range rb { - if v := byte(rr.Intn(256)); v != rb[j] { - t.Fatalf("Bad %v-th read buffer at index %v: got %v, want %v", i, j, rb[j], v) - } - } - - rx.Flush() - } - }() - - wg.Wait() -} diff --git a/pkg/tcpip/link/sharedmem/pipe/pipe_unsafe_state_autogen.go b/pkg/tcpip/link/sharedmem/pipe/pipe_unsafe_state_autogen.go new file mode 100644 index 000000000..d3b40feb4 --- /dev/null +++ b/pkg/tcpip/link/sharedmem/pipe/pipe_unsafe_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package pipe diff --git a/pkg/tcpip/link/sharedmem/queue/BUILD b/pkg/tcpip/link/sharedmem/queue/BUILD deleted file mode 100644 index 3ba06af73..000000000 --- a/pkg/tcpip/link/sharedmem/queue/BUILD +++ /dev/null @@ -1,27 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "queue", - srcs = [ - "rx.go", - "tx.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/log", - "//pkg/tcpip/link/sharedmem/pipe", - ], -) - -go_test( - name = "queue_test", - srcs = [ - "queue_test.go", - ], - library = ":queue", - deps = [ - "//pkg/tcpip/link/sharedmem/pipe", - ], -) diff --git a/pkg/tcpip/link/sharedmem/queue/queue_state_autogen.go b/pkg/tcpip/link/sharedmem/queue/queue_state_autogen.go new file mode 100644 index 000000000..563d4fbb4 --- /dev/null +++ b/pkg/tcpip/link/sharedmem/queue/queue_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package queue diff --git a/pkg/tcpip/link/sharedmem/queue/queue_test.go b/pkg/tcpip/link/sharedmem/queue/queue_test.go deleted file mode 100644 index 9a0aad5d7..000000000 --- a/pkg/tcpip/link/sharedmem/queue/queue_test.go +++ /dev/null @@ -1,517 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package queue - -import ( - "encoding/binary" - "reflect" - "testing" - - "gvisor.dev/gvisor/pkg/tcpip/link/sharedmem/pipe" -) - -func TestBasicTxQueue(t *testing.T) { - // Tests that a basic transmit on a queue works, and that completion - // gets properly reported as well. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Tx - q.Init(pb1, pb2) - - // Enqueue two buffers. - b := []TxBuffer{ - {nil, 100, 60}, - {nil, 200, 40}, - } - - b[0].Next = &b[1] - - const usedID = 1002 - const usedTotalSize = 100 - if !q.Enqueue(usedID, usedTotalSize, 2, &b[0]) { - t.Fatalf("Enqueue failed on empty queue") - } - - // Check the contents of the pipe. - d := rxp.Pull() - if d == nil { - t.Fatalf("Tx pipe is empty after Enqueue") - } - - want := []byte{ - 234, 3, 0, 0, 0, 0, 0, 0, // id - 100, 0, 0, 0, // total size - 0, 0, 0, 0, // reserved - 100, 0, 0, 0, 0, 0, 0, 0, // offset 1 - 60, 0, 0, 0, // size 1 - 200, 0, 0, 0, 0, 0, 0, 0, // offset 2 - 40, 0, 0, 0, // size 2 - } - - if !reflect.DeepEqual(want, d) { - t.Fatalf("Bad posted packet: got %v, want %v", d, want) - } - - rxp.Flush() - - // Check that there are no completions yet. - if _, ok := q.CompletedPacket(); ok { - t.Fatalf("Packet reported as completed too soon") - } - - // Post a completion. - d = txp.Push(8) - if d == nil { - t.Fatalf("Unable to push to rx pipe") - } - binary.LittleEndian.PutUint64(d, usedID) - txp.Flush() - - // Check that completion is properly reported. - id, ok := q.CompletedPacket() - if !ok { - t.Fatalf("Completion not reported") - } - - if id != usedID { - t.Fatalf("Bad completion id: got %v, want %v", id, usedID) - } -} - -func TestBasicRxQueue(t *testing.T) { - // Tests that a basic receive on a queue works. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Rx - q.Init(pb1, pb2, nil) - - // Post two buffers. - b := []RxBuffer{ - {100, 60, 1077, 0}, - {200, 40, 2123, 0}, - } - - if !q.PostBuffers(b) { - t.Fatalf("PostBuffers failed on empty queue") - } - - // Check the contents of the pipe. - want := [][]byte{ - { - 100, 0, 0, 0, 0, 0, 0, 0, // Offset1 - 60, 0, 0, 0, // Size1 - 0, 0, 0, 0, // Remaining in group 1 - 0, 0, 0, 0, 0, 0, 0, 0, // User data 1 - 53, 4, 0, 0, 0, 0, 0, 0, // ID 1 - }, - { - 200, 0, 0, 0, 0, 0, 0, 0, // Offset2 - 40, 0, 0, 0, // Size2 - 0, 0, 0, 0, // Remaining in group 2 - 0, 0, 0, 0, 0, 0, 0, 0, // User data 2 - 75, 8, 0, 0, 0, 0, 0, 0, // ID 2 - }, - } - - for i := range b { - d := rxp.Pull() - if d == nil { - t.Fatalf("Tx pipe is empty after PostBuffers") - } - - if !reflect.DeepEqual(want[i], d) { - t.Fatalf("Bad posted packet: got %v, want %v", d, want[i]) - } - - rxp.Flush() - } - - // Check that there are no completions. - if _, n := q.Dequeue(nil); n != 0 { - t.Fatalf("Packet reported as received too soon") - } - - // Post a completion. - d := txp.Push(sizeOfConsumedPacketHeader + 2*sizeOfConsumedBuffer) - if d == nil { - t.Fatalf("Unable to push to rx pipe") - } - - copy(d, []byte{ - 100, 0, 0, 0, // packet size - 0, 0, 0, 0, // reserved - - 100, 0, 0, 0, 0, 0, 0, 0, // offset 1 - 60, 0, 0, 0, // size 1 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 1 - 53, 4, 0, 0, 0, 0, 0, 0, // ID 1 - - 200, 0, 0, 0, 0, 0, 0, 0, // offset 2 - 40, 0, 0, 0, // size 2 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 2 - 75, 8, 0, 0, 0, 0, 0, 0, // ID 2 - }) - - txp.Flush() - - // Check that completion is properly reported. - bufs, n := q.Dequeue(nil) - if n != 100 { - t.Fatalf("Bad packet size: got %v, want %v", n, 100) - } - - if !reflect.DeepEqual(bufs, b) { - t.Fatalf("Bad returned buffers: got %v, want %v", bufs, b) - } -} - -func TestBadTxCompletion(t *testing.T) { - // Check that tx completions with bad sizes are properly ignored. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Tx - q.Init(pb1, pb2) - - // Post a completion that is too short, and check that it is ignored. - if d := txp.Push(7); d == nil { - t.Fatalf("Unable to push to rx pipe") - } - txp.Flush() - - if _, ok := q.CompletedPacket(); ok { - t.Fatalf("Bad completion not ignored") - } - - // Post a completion that is too long, and check that it is ignored. - if d := txp.Push(10); d == nil { - t.Fatalf("Unable to push to rx pipe") - } - txp.Flush() - - if _, ok := q.CompletedPacket(); ok { - t.Fatalf("Bad completion not ignored") - } -} - -func TestBadRxCompletion(t *testing.T) { - // Check that bad rx completions are properly ignored. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Rx - q.Init(pb1, pb2, nil) - - // Post a completion that is too short, and check that it is ignored. - if d := txp.Push(7); d == nil { - t.Fatalf("Unable to push to rx pipe") - } - txp.Flush() - - if b, _ := q.Dequeue(nil); b != nil { - t.Fatalf("Bad completion not ignored") - } - - // Post a completion whose buffer sizes add up to less than the total - // size. - d := txp.Push(sizeOfConsumedPacketHeader + 2*sizeOfConsumedBuffer) - if d == nil { - t.Fatalf("Unable to push to rx pipe") - } - - copy(d, []byte{ - 100, 0, 0, 0, // packet size - 0, 0, 0, 0, // reserved - - 100, 0, 0, 0, 0, 0, 0, 0, // offset 1 - 10, 0, 0, 0, // size 1 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 1 - 53, 4, 0, 0, 0, 0, 0, 0, // ID 1 - - 200, 0, 0, 0, 0, 0, 0, 0, // offset 2 - 10, 0, 0, 0, // size 2 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 2 - 75, 8, 0, 0, 0, 0, 0, 0, // ID 2 - }) - - txp.Flush() - if b, _ := q.Dequeue(nil); b != nil { - t.Fatalf("Bad completion not ignored") - } - - // Post a completion whose buffer sizes will cause a 32-bit overflow, - // but adds up to the right number. - d = txp.Push(sizeOfConsumedPacketHeader + 2*sizeOfConsumedBuffer) - if d == nil { - t.Fatalf("Unable to push to rx pipe") - } - - copy(d, []byte{ - 100, 0, 0, 0, // packet size - 0, 0, 0, 0, // reserved - - 100, 0, 0, 0, 0, 0, 0, 0, // offset 1 - 255, 255, 255, 255, // size 1 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 1 - 53, 4, 0, 0, 0, 0, 0, 0, // ID 1 - - 200, 0, 0, 0, 0, 0, 0, 0, // offset 2 - 101, 0, 0, 0, // size 2 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 2 - 75, 8, 0, 0, 0, 0, 0, 0, // ID 2 - }) - - txp.Flush() - if b, _ := q.Dequeue(nil); b != nil { - t.Fatalf("Bad completion not ignored") - } -} - -func TestFillTxPipe(t *testing.T) { - // Check that transmitting a new buffer when the buffer pipe is full - // fails gracefully. - pb1 := make([]byte, 104) - pb2 := make([]byte, 104) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Tx - q.Init(pb1, pb2) - - // Transmit twice, which should fill the tx pipe. - b := []TxBuffer{ - {nil, 100, 60}, - {nil, 200, 40}, - } - - b[0].Next = &b[1] - - const usedID = 1002 - const usedTotalSize = 100 - for i := uint64(0); i < 2; i++ { - if !q.Enqueue(usedID+i, usedTotalSize, 2, &b[0]) { - t.Fatalf("Failed to transmit buffer") - } - } - - // Transmit another packet now that the tx pipe is full. - if q.Enqueue(usedID+2, usedTotalSize, 2, &b[0]) { - t.Fatalf("Enqueue succeeded when tx pipe is full") - } -} - -func TestFillRxPipe(t *testing.T) { - // Check that posting a new buffer when the buffer pipe is full fails - // gracefully. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Rx - q.Init(pb1, pb2, nil) - - // Post a buffer twice, it should fill the tx pipe. - b := []RxBuffer{ - {100, 60, 1077, 0}, - } - - for i := 0; i < 2; i++ { - if !q.PostBuffers(b) { - t.Fatalf("PostBuffers failed on non-full queue") - } - } - - // Post another buffer now that the tx pipe is full. - if q.PostBuffers(b) { - t.Fatalf("PostBuffers succeeded on full queue") - } -} - -func TestLotsOfTransmissions(t *testing.T) { - // Make sure pipes are being properly flushed when transmitting packets. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Tx - q.Init(pb1, pb2) - - // Prepare packet with two buffers. - b := []TxBuffer{ - {nil, 100, 60}, - {nil, 200, 40}, - } - - b[0].Next = &b[1] - - const usedID = 1002 - const usedTotalSize = 100 - - // Post 100000 packets and completions. - for i := 100000; i > 0; i-- { - if !q.Enqueue(usedID, usedTotalSize, 2, &b[0]) { - t.Fatalf("Enqueue failed on non-full queue") - } - - if d := rxp.Pull(); d == nil { - t.Fatalf("Tx pipe is empty after Enqueue") - } - rxp.Flush() - - d := txp.Push(8) - if d == nil { - t.Fatalf("Unable to write to rx pipe") - } - binary.LittleEndian.PutUint64(d, usedID) - txp.Flush() - if _, ok := q.CompletedPacket(); !ok { - t.Fatalf("Completion not returned") - } - } -} - -func TestLotsOfReceptions(t *testing.T) { - // Make sure pipes are being properly flushed when receiving packets. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var rxp pipe.Rx - rxp.Init(pb1) - - var txp pipe.Tx - txp.Init(pb2) - - var q Rx - q.Init(pb1, pb2, nil) - - // Prepare for posting two buffers. - b := []RxBuffer{ - {100, 60, 1077, 0}, - {200, 40, 2123, 0}, - } - - // Post 100000 buffers and completions. - for i := 100000; i > 0; i-- { - if !q.PostBuffers(b) { - t.Fatalf("PostBuffers failed on non-full queue") - } - - if d := rxp.Pull(); d == nil { - t.Fatalf("Tx pipe is empty after PostBuffers") - } - rxp.Flush() - - if d := rxp.Pull(); d == nil { - t.Fatalf("Tx pipe is empty after PostBuffers") - } - rxp.Flush() - - d := txp.Push(sizeOfConsumedPacketHeader + 2*sizeOfConsumedBuffer) - if d == nil { - t.Fatalf("Unable to push to rx pipe") - } - - copy(d, []byte{ - 100, 0, 0, 0, // packet size - 0, 0, 0, 0, // reserved - - 100, 0, 0, 0, 0, 0, 0, 0, // offset 1 - 60, 0, 0, 0, // size 1 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 1 - 53, 4, 0, 0, 0, 0, 0, 0, // ID 1 - - 200, 0, 0, 0, 0, 0, 0, 0, // offset 2 - 40, 0, 0, 0, // size 2 - 0, 0, 0, 0, 0, 0, 0, 0, // user data 2 - 75, 8, 0, 0, 0, 0, 0, 0, // ID 2 - }) - - txp.Flush() - - if _, n := q.Dequeue(nil); n == 0 { - t.Fatalf("Dequeue failed when there is a completion") - } - } -} - -func TestRxEnableNotification(t *testing.T) { - // Check that enabling nofifications results in properly updated state. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var state uint32 - var q Rx - q.Init(pb1, pb2, &state) - - q.EnableNotification() - if state != eventFDEnabled { - t.Fatalf("Bad value in shared state: got %v, want %v", state, eventFDEnabled) - } -} - -func TestRxDisableNotification(t *testing.T) { - // Check that disabling nofifications results in properly updated state. - pb1 := make([]byte, 100) - pb2 := make([]byte, 100) - - var state uint32 - var q Rx - q.Init(pb1, pb2, &state) - - q.DisableNotification() - if state != eventFDDisabled { - t.Fatalf("Bad value in shared state: got %v, want %v", state, eventFDDisabled) - } -} diff --git a/pkg/tcpip/link/sharedmem/sharedmem_state_autogen.go b/pkg/tcpip/link/sharedmem/sharedmem_state_autogen.go new file mode 100644 index 000000000..bc12017b2 --- /dev/null +++ b/pkg/tcpip/link/sharedmem/sharedmem_state_autogen.go @@ -0,0 +1,6 @@ +// automatically generated by stateify. + +// +build linux +// +build linux + +package sharedmem diff --git a/pkg/tcpip/link/sharedmem/sharedmem_test.go b/pkg/tcpip/link/sharedmem/sharedmem_test.go deleted file mode 100644 index 22d5c97f1..000000000 --- a/pkg/tcpip/link/sharedmem/sharedmem_test.go +++ /dev/null @@ -1,817 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// +build linux - -package sharedmem - -import ( - "bytes" - "io/ioutil" - "math/rand" - "os" - "strings" - "syscall" - "testing" - "time" - - "gvisor.dev/gvisor/pkg/sync" - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/buffer" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/link/sharedmem/pipe" - "gvisor.dev/gvisor/pkg/tcpip/link/sharedmem/queue" - "gvisor.dev/gvisor/pkg/tcpip/stack" -) - -const ( - localLinkAddr = "\xde\xad\xbe\xef\x56\x78" - remoteLinkAddr = "\xde\xad\xbe\xef\x12\x34" - - queueDataSize = 1024 * 1024 - queuePipeSize = 4096 -) - -type queueBuffers struct { - data []byte - rx pipe.Tx - tx pipe.Rx -} - -func initQueue(t *testing.T, q *queueBuffers, c *QueueConfig) { - // Prepare tx pipe. - b, err := getBuffer(c.TxPipeFD) - if err != nil { - t.Fatalf("getBuffer failed: %v", err) - } - q.tx.Init(b) - - // Prepare rx pipe. - b, err = getBuffer(c.RxPipeFD) - if err != nil { - t.Fatalf("getBuffer failed: %v", err) - } - q.rx.Init(b) - - // Get data slice. - q.data, err = getBuffer(c.DataFD) - if err != nil { - t.Fatalf("getBuffer failed: %v", err) - } -} - -func (q *queueBuffers) cleanup() { - syscall.Munmap(q.tx.Bytes()) - syscall.Munmap(q.rx.Bytes()) - syscall.Munmap(q.data) -} - -type packetInfo struct { - addr tcpip.LinkAddress - proto tcpip.NetworkProtocolNumber - vv buffer.VectorisedView - linkHeader buffer.View -} - -type testContext struct { - t *testing.T - ep *endpoint - txCfg QueueConfig - rxCfg QueueConfig - txq queueBuffers - rxq queueBuffers - - packetCh chan struct{} - mu sync.Mutex - packets []packetInfo -} - -func newTestContext(t *testing.T, mtu, bufferSize uint32, addr tcpip.LinkAddress) *testContext { - var err error - c := &testContext{ - t: t, - packetCh: make(chan struct{}, 1000000), - } - c.txCfg = createQueueFDs(t, queueSizes{ - dataSize: queueDataSize, - txPipeSize: queuePipeSize, - rxPipeSize: queuePipeSize, - sharedDataSize: 4096, - }) - - c.rxCfg = createQueueFDs(t, queueSizes{ - dataSize: queueDataSize, - txPipeSize: queuePipeSize, - rxPipeSize: queuePipeSize, - sharedDataSize: 4096, - }) - - initQueue(t, &c.txq, &c.txCfg) - initQueue(t, &c.rxq, &c.rxCfg) - - ep, err := New(mtu, bufferSize, addr, c.txCfg, c.rxCfg) - if err != nil { - t.Fatalf("New failed: %v", err) - } - - c.ep = ep.(*endpoint) - c.ep.Attach(c) - - return c -} - -func (c *testContext) DeliverNetworkPacket(remoteLinkAddr, localLinkAddr tcpip.LinkAddress, proto tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - c.mu.Lock() - c.packets = append(c.packets, packetInfo{ - addr: remoteLinkAddr, - proto: proto, - vv: pkt.Data.Clone(nil), - }) - c.mu.Unlock() - - c.packetCh <- struct{}{} -} - -func (c *testContext) DeliverOutboundPacket(remoteLinkAddr, localLinkAddr tcpip.LinkAddress, proto tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - panic("unimplemented") -} - -func (c *testContext) cleanup() { - c.ep.Close() - closeFDs(&c.txCfg) - closeFDs(&c.rxCfg) - c.txq.cleanup() - c.rxq.cleanup() -} - -func (c *testContext) waitForPackets(n int, to <-chan time.Time, errorStr string) { - for i := 0; i < n; i++ { - select { - case <-c.packetCh: - case <-to: - c.t.Fatalf(errorStr) - } - } -} - -func (c *testContext) pushRxCompletion(size uint32, bs []queue.RxBuffer) { - b := c.rxq.rx.Push(queue.RxCompletionSize(len(bs))) - queue.EncodeRxCompletion(b, size, 0) - for i := range bs { - queue.EncodeRxCompletionBuffer(b, i, queue.RxBuffer{ - Offset: bs[i].Offset, - Size: bs[i].Size, - ID: bs[i].ID, - }) - } -} - -func randomFill(b []byte) { - for i := range b { - b[i] = byte(rand.Intn(256)) - } -} - -func shuffle(b []int) { - for i := len(b) - 1; i >= 0; i-- { - j := rand.Intn(i + 1) - b[i], b[j] = b[j], b[i] - } -} - -func createFile(t *testing.T, size int64, initQueue bool) int { - tmpDir := os.Getenv("TEST_TMPDIR") - if tmpDir == "" { - tmpDir = os.Getenv("TMPDIR") - } - f, err := ioutil.TempFile(tmpDir, "sharedmem_test") - if err != nil { - t.Fatalf("TempFile failed: %v", err) - } - defer f.Close() - syscall.Unlink(f.Name()) - - if initQueue { - // Write the "slot-free" flag in the initial queue. - _, err := f.WriteAt([]byte{0, 0, 0, 0, 0, 0, 0, 0x80}, 0) - if err != nil { - t.Fatalf("WriteAt failed: %v", err) - } - } - - fd, err := syscall.Dup(int(f.Fd())) - if err != nil { - t.Fatalf("Dup failed: %v", err) - } - - if err := syscall.Ftruncate(fd, size); err != nil { - syscall.Close(fd) - t.Fatalf("Ftruncate failed: %v", err) - } - - return fd -} - -func closeFDs(c *QueueConfig) { - syscall.Close(c.DataFD) - syscall.Close(c.EventFD) - syscall.Close(c.TxPipeFD) - syscall.Close(c.RxPipeFD) - syscall.Close(c.SharedDataFD) -} - -type queueSizes struct { - dataSize int64 - txPipeSize int64 - rxPipeSize int64 - sharedDataSize int64 -} - -func createQueueFDs(t *testing.T, s queueSizes) QueueConfig { - fd, _, err := syscall.RawSyscall(syscall.SYS_EVENTFD2, 0, 0, 0) - if err != 0 { - t.Fatalf("eventfd failed: %v", error(err)) - } - - return QueueConfig{ - EventFD: int(fd), - DataFD: createFile(t, s.dataSize, false), - TxPipeFD: createFile(t, s.txPipeSize, true), - RxPipeFD: createFile(t, s.rxPipeSize, true), - SharedDataFD: createFile(t, s.sharedDataSize, false), - } -} - -// TestSimpleSend sends 1000 packets with random header and payload sizes, -// then checks that the right payload is received on the shared memory queues. -func TestSimpleSend(t *testing.T) { - c := newTestContext(t, 20000, 1500, localLinkAddr) - defer c.cleanup() - - // Prepare route. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - } - - for iters := 1000; iters > 0; iters-- { - func() { - hdrLen, dataLen := rand.Intn(10000), rand.Intn(10000) - - // Prepare and send packet. - hdrBuf := buffer.NewView(hdrLen) - randomFill(hdrBuf) - - data := buffer.NewView(dataLen) - randomFill(data) - - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: hdrLen + int(c.ep.MaxHeaderLength()), - Data: data.ToVectorisedView(), - }) - copy(pkt.NetworkHeader().Push(hdrLen), hdrBuf) - - proto := tcpip.NetworkProtocolNumber(rand.Intn(0x10000)) - if err := c.ep.WritePacket(&r, nil /* gso */, proto, pkt); err != nil { - t.Fatalf("WritePacket failed: %v", err) - } - - // Receive packet. - desc := c.txq.tx.Pull() - pi := queue.DecodeTxPacketHeader(desc) - if pi.Reserved != 0 { - t.Fatalf("Reserved value is non-zero: 0x%x", pi.Reserved) - } - contents := make([]byte, 0, pi.Size) - for i := 0; i < pi.BufferCount; i++ { - bi := queue.DecodeTxBufferHeader(desc, i) - contents = append(contents, c.txq.data[bi.Offset:][:bi.Size]...) - } - c.txq.tx.Flush() - - defer func() { - // Tell the endpoint about the completion of the write. - b := c.txq.rx.Push(8) - queue.EncodeTxCompletion(b, pi.ID) - c.txq.rx.Flush() - }() - - // Check the ethernet header. - ethTemplate := make(header.Ethernet, header.EthernetMinimumSize) - ethTemplate.Encode(&header.EthernetFields{ - SrcAddr: localLinkAddr, - DstAddr: remoteLinkAddr, - Type: proto, - }) - if got := contents[:header.EthernetMinimumSize]; !bytes.Equal(got, []byte(ethTemplate)) { - t.Fatalf("Bad ethernet header in packet: got %x, want %x", got, ethTemplate) - } - - // Compare contents skipping the ethernet header added by the - // endpoint. - merged := append(hdrBuf, data...) - if uint32(len(contents)) < pi.Size { - t.Fatalf("Sum of buffers is less than packet size: %v < %v", len(contents), pi.Size) - } - contents = contents[:pi.Size][header.EthernetMinimumSize:] - - if !bytes.Equal(contents, merged) { - t.Fatalf("Buffers are different: got %x (%v bytes), want %x (%v bytes)", contents, len(contents), merged, len(merged)) - } - }() - } -} - -// TestPreserveSrcAddressInSend calls WritePacket once with LocalLinkAddress -// set in Route (using much of the same code as TestSimpleSend), then checks -// that the encoded ethernet header received includes the correct SrcAddr. -func TestPreserveSrcAddressInSend(t *testing.T) { - c := newTestContext(t, 20000, 1500, localLinkAddr) - defer c.cleanup() - - newLocalLinkAddress := tcpip.LinkAddress(strings.Repeat("0xFE", 6)) - // Set both remote and local link address in route. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - LocalLinkAddress: newLocalLinkAddress, - } - - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - // WritePacket panics given a prependable with anything less than - // the minimum size of the ethernet header. - ReserveHeaderBytes: header.EthernetMinimumSize, - }) - - proto := tcpip.NetworkProtocolNumber(rand.Intn(0x10000)) - if err := c.ep.WritePacket(&r, nil /* gso */, proto, pkt); err != nil { - t.Fatalf("WritePacket failed: %v", err) - } - - // Receive packet. - desc := c.txq.tx.Pull() - pi := queue.DecodeTxPacketHeader(desc) - if pi.Reserved != 0 { - t.Fatalf("Reserved value is non-zero: 0x%x", pi.Reserved) - } - contents := make([]byte, 0, pi.Size) - for i := 0; i < pi.BufferCount; i++ { - bi := queue.DecodeTxBufferHeader(desc, i) - contents = append(contents, c.txq.data[bi.Offset:][:bi.Size]...) - } - c.txq.tx.Flush() - - defer func() { - // Tell the endpoint about the completion of the write. - b := c.txq.rx.Push(8) - queue.EncodeTxCompletion(b, pi.ID) - c.txq.rx.Flush() - }() - - // Check that the ethernet header contains the expected SrcAddr. - ethTemplate := make(header.Ethernet, header.EthernetMinimumSize) - ethTemplate.Encode(&header.EthernetFields{ - SrcAddr: newLocalLinkAddress, - DstAddr: remoteLinkAddr, - Type: proto, - }) - if got := contents[:header.EthernetMinimumSize]; !bytes.Equal(got, []byte(ethTemplate)) { - t.Fatalf("Bad ethernet header in packet: got %x, want %x", got, ethTemplate) - } -} - -// TestFillTxQueue sends packets until the queue is full. -func TestFillTxQueue(t *testing.T) { - c := newTestContext(t, 20000, 1500, localLinkAddr) - defer c.cleanup() - - // Prepare to send a packet. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - } - - buf := buffer.NewView(100) - - // Each packet is uses no more than 40 bytes, so write that many packets - // until the tx queue if full. - ids := make(map[uint64]struct{}) - for i := queuePipeSize / 40; i > 0; i-- { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - - // Check that they have different IDs. - desc := c.txq.tx.Pull() - pi := queue.DecodeTxPacketHeader(desc) - if _, ok := ids[pi.ID]; ok { - t.Fatalf("ID (%v) reused", pi.ID) - } - ids[pi.ID] = struct{}{} - } - - // Next attempt to write must fail. - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if want, err := tcpip.ErrWouldBlock, c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != want { - t.Fatalf("WritePacket return unexpected result: got %v, want %v", err, want) - } -} - -// TestFillTxQueueAfterBadCompletion sends a bad completion, then sends packets -// until the queue is full. -func TestFillTxQueueAfterBadCompletion(t *testing.T) { - c := newTestContext(t, 20000, 1500, localLinkAddr) - defer c.cleanup() - - // Send a bad completion. - queue.EncodeTxCompletion(c.txq.rx.Push(8), 1) - c.txq.rx.Flush() - - // Prepare to send a packet. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - } - - buf := buffer.NewView(100) - - // Send two packets so that the id slice has at least two slots. - for i := 2; i > 0; i-- { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - } - - // Complete the two writes twice. - for i := 2; i > 0; i-- { - pi := queue.DecodeTxPacketHeader(c.txq.tx.Pull()) - - queue.EncodeTxCompletion(c.txq.rx.Push(8), pi.ID) - queue.EncodeTxCompletion(c.txq.rx.Push(8), pi.ID) - c.txq.rx.Flush() - } - c.txq.tx.Flush() - - // Each packet is uses no more than 40 bytes, so write that many packets - // until the tx queue if full. - ids := make(map[uint64]struct{}) - for i := queuePipeSize / 40; i > 0; i-- { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - - // Check that they have different IDs. - desc := c.txq.tx.Pull() - pi := queue.DecodeTxPacketHeader(desc) - if _, ok := ids[pi.ID]; ok { - t.Fatalf("ID (%v) reused", pi.ID) - } - ids[pi.ID] = struct{}{} - } - - // Next attempt to write must fail. - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if want, err := tcpip.ErrWouldBlock, c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != want { - t.Fatalf("WritePacket return unexpected result: got %v, want %v", err, want) - } -} - -// TestFillTxMemory sends packets until the we run out of shared memory. -func TestFillTxMemory(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - defer c.cleanup() - - // Prepare to send a packet. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - } - - buf := buffer.NewView(100) - - // Each packet is uses up one buffer, so write as many as possible until - // we fill the memory. - ids := make(map[uint64]struct{}) - for i := queueDataSize / bufferSize; i > 0; i-- { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - - // Check that they have different IDs. - desc := c.txq.tx.Pull() - pi := queue.DecodeTxPacketHeader(desc) - if _, ok := ids[pi.ID]; ok { - t.Fatalf("ID (%v) reused", pi.ID) - } - ids[pi.ID] = struct{}{} - c.txq.tx.Flush() - } - - // Next attempt to write must fail. - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt) - if want := tcpip.ErrWouldBlock; err != want { - t.Fatalf("WritePacket return unexpected result: got %v, want %v", err, want) - } -} - -// TestFillTxMemoryWithMultiBuffer sends packets until the we run out of -// shared memory for a 2-buffer packet, but still with room for a 1-buffer -// packet. -func TestFillTxMemoryWithMultiBuffer(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - defer c.cleanup() - - // Prepare to send a packet. - r := stack.Route{ - RemoteLinkAddress: remoteLinkAddr, - } - - buf := buffer.NewView(100) - - // Each packet is uses up one buffer, so write as many as possible - // until there is only one buffer left. - for i := queueDataSize/bufferSize - 1; i > 0; i-- { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - - // Pull the posted buffer. - c.txq.tx.Pull() - c.txq.tx.Flush() - } - - // Attempt to write a two-buffer packet. It must fail. - { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buffer.NewView(bufferSize).ToVectorisedView(), - }) - if want, err := tcpip.ErrWouldBlock, c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != want { - t.Fatalf("WritePacket return unexpected result: got %v, want %v", err, want) - } - } - - // Attempt to write the one-buffer packet again. It must succeed. - { - pkt := stack.NewPacketBuffer(stack.PacketBufferOptions{ - ReserveHeaderBytes: int(c.ep.MaxHeaderLength()), - Data: buf.ToVectorisedView(), - }) - if err := c.ep.WritePacket(&r, nil /* gso */, header.IPv4ProtocolNumber, pkt); err != nil { - t.Fatalf("WritePacket failed unexpectedly: %v", err) - } - } -} - -func pollPull(t *testing.T, p *pipe.Rx, to <-chan time.Time, errStr string) []byte { - t.Helper() - - for { - b := p.Pull() - if b != nil { - return b - } - - select { - case <-time.After(10 * time.Millisecond): - case <-to: - t.Fatal(errStr) - } - } -} - -// TestSimpleReceive completes 1000 different receives with random payload and -// random number of buffers. It checks that the contents match the expected -// values. -func TestSimpleReceive(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - defer c.cleanup() - - // Check that buffers have been posted. - limit := c.ep.rx.q.PostedBuffersLimit() - for i := uint64(0); i < limit; i++ { - timeout := time.After(2 * time.Second) - bi := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, timeout, "Timeout waiting for all buffers to be posted")) - - if want := i * bufferSize; want != bi.Offset { - t.Fatalf("Bad posted offset: got %v, want %v", bi.Offset, want) - } - - if want := i; want != bi.ID { - t.Fatalf("Bad posted ID: got %v, want %v", bi.ID, want) - } - - if bufferSize != bi.Size { - t.Fatalf("Bad posted bufferSize: got %v, want %v", bi.Size, bufferSize) - } - } - c.rxq.tx.Flush() - - // Create a slice with the indices 0..limit-1. - idx := make([]int, limit) - for i := range idx { - idx[i] = i - } - - // Complete random packets 1000 times. - for iters := 1000; iters > 0; iters-- { - timeout := time.After(2 * time.Second) - // Prepare a random packet. - shuffle(idx) - n := 1 + rand.Intn(10) - bufs := make([]queue.RxBuffer, n) - contents := make([]byte, bufferSize*n-rand.Intn(500)) - randomFill(contents) - for i := range bufs { - j := idx[i] - bufs[i].Size = bufferSize - bufs[i].Offset = uint64(bufferSize * j) - bufs[i].ID = uint64(j) - - copy(c.rxq.data[bufs[i].Offset:][:bufferSize], contents[i*bufferSize:]) - } - - // Push completion. - c.pushRxCompletion(uint32(len(contents)), bufs) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Wait for packet to be received, then check it. - c.waitForPackets(1, time.After(5*time.Second), "Timeout waiting for packet") - c.mu.Lock() - rcvd := []byte(c.packets[0].vv.ToView()) - c.packets = c.packets[:0] - c.mu.Unlock() - - if contents := contents[header.EthernetMinimumSize:]; !bytes.Equal(contents, rcvd) { - t.Fatalf("Unexpected buffer contents: got %x, want %x", rcvd, contents) - } - - // Check that buffers have been reposted. - for i := range bufs { - bi := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, timeout, "Timeout waiting for buffers to be reposted")) - if bi != bufs[i] { - t.Fatalf("Unexpected buffer reposted: got %x, want %x", bi, bufs[i]) - } - } - c.rxq.tx.Flush() - } -} - -// TestRxBuffersReposted tests that rx buffers get reposted after they have been -// completed. -func TestRxBuffersReposted(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - defer c.cleanup() - - // Receive all posted buffers. - limit := c.ep.rx.q.PostedBuffersLimit() - buffers := make([]queue.RxBuffer, 0, limit) - for i := limit; i > 0; i-- { - timeout := time.After(2 * time.Second) - buffers = append(buffers, queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, timeout, "Timeout waiting for all buffers"))) - } - c.rxq.tx.Flush() - - // Check that all buffers are reposted when individually completed. - for i := range buffers { - timeout := time.After(2 * time.Second) - // Complete the buffer. - c.pushRxCompletion(buffers[i].Size, buffers[i:][:1]) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Wait for it to be reposted. - bi := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, timeout, "Timeout waiting for buffer to be reposted")) - if bi != buffers[i] { - t.Fatalf("Different buffer posted: got %v, want %v", bi, buffers[i]) - } - } - c.rxq.tx.Flush() - - // Check that all buffers are reposted when completed in pairs. - for i := 0; i < len(buffers)/2; i++ { - timeout := time.After(2 * time.Second) - // Complete with two buffers. - c.pushRxCompletion(2*bufferSize, buffers[2*i:][:2]) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Wait for them to be reposted. - for j := 0; j < 2; j++ { - bi := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, timeout, "Timeout waiting for buffer to be reposted")) - if bi != buffers[2*i+j] { - t.Fatalf("Different buffer posted: got %v, want %v", bi, buffers[2*i+j]) - } - } - } - c.rxq.tx.Flush() -} - -// TestReceivePostingIsFull checks that the endpoint will properly handle the -// case when a received buffer cannot be immediately reposted because it hasn't -// been pulled from the tx pipe yet. -func TestReceivePostingIsFull(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - defer c.cleanup() - - // Complete first posted buffer before flushing it from the tx pipe. - first := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, time.After(time.Second), "Timeout waiting for first buffer to be posted")) - c.pushRxCompletion(first.Size, []queue.RxBuffer{first}) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Check that packet is received. - c.waitForPackets(1, time.After(time.Second), "Timeout waiting for completed packet") - - // Complete another buffer. - second := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, time.After(time.Second), "Timeout waiting for second buffer to be posted")) - c.pushRxCompletion(second.Size, []queue.RxBuffer{second}) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Check that no packet is received yet, as the worker is blocked trying - // to repost. - select { - case <-time.After(500 * time.Millisecond): - case <-c.packetCh: - t.Fatalf("Unexpected packet received") - } - - // Flush tx queue, which will allow the first buffer to be reposted, - // and the second completion to be pulled. - c.rxq.tx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Check that second packet completes. - c.waitForPackets(1, time.After(time.Second), "Timeout waiting for second completed packet") -} - -// TestCloseWhileWaitingToPost closes the endpoint while it is waiting to -// repost a buffer. Make sure it backs out. -func TestCloseWhileWaitingToPost(t *testing.T) { - const bufferSize = 1500 - c := newTestContext(t, 20000, bufferSize, localLinkAddr) - cleaned := false - defer func() { - if !cleaned { - c.cleanup() - } - }() - - // Complete first posted buffer before flushing it from the tx pipe. - bi := queue.DecodeRxBufferHeader(pollPull(t, &c.rxq.tx, time.After(time.Second), "Timeout waiting for initial buffer to be posted")) - c.pushRxCompletion(bi.Size, []queue.RxBuffer{bi}) - c.rxq.rx.Flush() - syscall.Write(c.rxCfg.EventFD, []byte{1, 0, 0, 0, 0, 0, 0, 0}) - - // Wait for packet to be indicated. - c.waitForPackets(1, time.After(time.Second), "Timeout waiting for completed packet") - - // Cleanup and wait for worker to complete. - c.cleanup() - cleaned = true - c.ep.Wait() -} diff --git a/pkg/tcpip/link/sharedmem/sharedmem_unsafe_state_autogen.go b/pkg/tcpip/link/sharedmem/sharedmem_unsafe_state_autogen.go new file mode 100644 index 000000000..ac3a66520 --- /dev/null +++ b/pkg/tcpip/link/sharedmem/sharedmem_unsafe_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package sharedmem diff --git a/pkg/tcpip/link/sniffer/BUILD b/pkg/tcpip/link/sniffer/BUILD deleted file mode 100644 index 7cbc305e7..000000000 --- a/pkg/tcpip/link/sniffer/BUILD +++ /dev/null @@ -1,20 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "sniffer", - srcs = [ - "pcap.go", - "sniffer.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/log", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/nested", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/sniffer/sniffer_state_autogen.go b/pkg/tcpip/link/sniffer/sniffer_state_autogen.go new file mode 100644 index 000000000..8d79defea --- /dev/null +++ b/pkg/tcpip/link/sniffer/sniffer_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package sniffer diff --git a/pkg/tcpip/link/tun/BUILD b/pkg/tcpip/link/tun/BUILD deleted file mode 100644 index 0243424f6..000000000 --- a/pkg/tcpip/link/tun/BUILD +++ /dev/null @@ -1,40 +0,0 @@ -load("//tools:defs.bzl", "go_library") -load("//tools/go_generics:defs.bzl", "go_template_instance") - -package(licenses = ["notice"]) - -go_template_instance( - name = "tun_endpoint_refs", - out = "tun_endpoint_refs.go", - package = "tun", - prefix = "tunEndpoint", - template = "//pkg/refs_vfs2:refs_template", - types = { - "T": "tunEndpoint", - }, -) - -go_library( - name = "tun", - srcs = [ - "device.go", - "protocol.go", - "tun_endpoint_refs.go", - "tun_unsafe.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/abi/linux", - "//pkg/context", - "//pkg/log", - "//pkg/refs", - "//pkg/sync", - "//pkg/syserror", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/link/channel", - "//pkg/tcpip/stack", - "//pkg/waiter", - ], -) diff --git a/pkg/tcpip/link/tun/tun_endpoint_refs.go b/pkg/tcpip/link/tun/tun_endpoint_refs.go new file mode 100644 index 000000000..06d11f0e1 --- /dev/null +++ b/pkg/tcpip/link/tun/tun_endpoint_refs.go @@ -0,0 +1,118 @@ +package tun + +import ( + "sync/atomic" + + "fmt" + "gvisor.dev/gvisor/pkg/log" + refs_vfs1 "gvisor.dev/gvisor/pkg/refs" + "runtime" +) + +// ownerType is used to customize logging. Note that we use a pointer to T so +// that we do not copy the entire object when passed as a format parameter. +var tunEndpointownerType *tunEndpoint + +// Refs implements refs.RefCounter. It keeps a reference count using atomic +// operations and calls the destructor when the count reaches zero. +// +// Note that the number of references is actually refCount + 1 so that a default +// zero-value Refs object contains one reference. +// +// TODO(gvisor.dev/issue/1486): Store stack traces when leak check is enabled in +// a map with 16-bit hashes, and store the hash in the top 16 bits of refCount. +// This will allow us to add stack trace information to the leak messages +// without growing the size of Refs. +// +// +stateify savable +type tunEndpointRefs struct { + // refCount is composed of two fields: + // + // [32-bit speculative references]:[32-bit real references] + // + // Speculative references are used for TryIncRef, to avoid a CompareAndSwap + // loop. See IncRef, DecRef and TryIncRef for details of how these fields are + // used. + refCount int64 +} + +func (r *tunEndpointRefs) finalize() { + var note string + switch refs_vfs1.GetLeakMode() { + case refs_vfs1.NoLeakChecking: + return + case refs_vfs1.UninitializedLeakChecking: + note = "(Leak checker uninitialized): " + } + if n := r.ReadRefs(); n != 0 { + log.Warningf("%sRefs %p owned by %T garbage collected with ref count of %d (want 0)", note, r, tunEndpointownerType, n) + } +} + +// EnableLeakCheck checks for reference leaks when Refs gets garbage collected. +func (r *tunEndpointRefs) EnableLeakCheck() { + if refs_vfs1.GetLeakMode() != refs_vfs1.NoLeakChecking { + runtime.SetFinalizer(r, (*tunEndpointRefs).finalize) + } +} + +// ReadRefs returns the current number of references. The returned count is +// inherently racy and is unsafe to use without external synchronization. +func (r *tunEndpointRefs) ReadRefs() int64 { + + return atomic.LoadInt64(&r.refCount) + 1 +} + +// IncRef implements refs.RefCounter.IncRef. +// +//go:nosplit +func (r *tunEndpointRefs) IncRef() { + if v := atomic.AddInt64(&r.refCount, 1); v <= 0 { + panic(fmt.Sprintf("Incrementing non-positive ref count %p owned by %T", r, tunEndpointownerType)) + } +} + +// TryIncRef implements refs.RefCounter.TryIncRef. +// +// To do this safely without a loop, a speculative reference is first acquired +// on the object. This allows multiple concurrent TryIncRef calls to distinguish +// other TryIncRef calls from genuine references held. +// +//go:nosplit +func (r *tunEndpointRefs) TryIncRef() bool { + const speculativeRef = 1 << 32 + v := atomic.AddInt64(&r.refCount, speculativeRef) + if int32(v) < 0 { + + atomic.AddInt64(&r.refCount, -speculativeRef) + return false + } + + atomic.AddInt64(&r.refCount, -speculativeRef+1) + return true +} + +// DecRef implements refs.RefCounter.DecRef. +// +// Note that speculative references are counted here. Since they were added +// prior to real references reaching zero, they will successfully convert to +// real references. In other words, we see speculative references only in the +// following case: +// +// A: TryIncRef [speculative increase => sees non-negative references] +// B: DecRef [real decrease] +// A: TryIncRef [transform speculative to real] +// +//go:nosplit +func (r *tunEndpointRefs) DecRef(destroy func()) { + switch v := atomic.AddInt64(&r.refCount, -1); { + case v < -1: + panic(fmt.Sprintf("Decrementing non-positive ref count %p, owned by %T", r, tunEndpointownerType)) + + case v == -1: + + if destroy != nil { + destroy() + } + } +} diff --git a/pkg/tcpip/link/tun/tun_state_autogen.go b/pkg/tcpip/link/tun/tun_state_autogen.go new file mode 100644 index 000000000..0b3041e84 --- /dev/null +++ b/pkg/tcpip/link/tun/tun_state_autogen.go @@ -0,0 +1,65 @@ +// automatically generated by stateify. + +package tun + +import ( + "gvisor.dev/gvisor/pkg/state" +) + +func (x *Device) StateTypeName() string { + return "pkg/tcpip/link/tun.Device" +} + +func (x *Device) StateFields() []string { + return []string{ + "Queue", + "endpoint", + "notifyHandle", + "flags", + } +} + +func (x *Device) StateSave(m state.Sink) { + x.beforeSave() + m.Save(0, &x.Queue) + m.Save(1, &x.endpoint) + m.Save(2, &x.notifyHandle) + m.Save(3, &x.flags) +} + +func (x *Device) afterLoad() {} + +func (x *Device) StateLoad(m state.Source) { + m.Load(0, &x.Queue) + m.Load(1, &x.endpoint) + m.Load(2, &x.notifyHandle) + m.Load(3, &x.flags) +} + +func (x *tunEndpointRefs) StateTypeName() string { + return "pkg/tcpip/link/tun.tunEndpointRefs" +} + +func (x *tunEndpointRefs) StateFields() []string { + return []string{ + "refCount", + } +} + +func (x *tunEndpointRefs) beforeSave() {} + +func (x *tunEndpointRefs) StateSave(m state.Sink) { + x.beforeSave() + m.Save(0, &x.refCount) +} + +func (x *tunEndpointRefs) afterLoad() {} + +func (x *tunEndpointRefs) StateLoad(m state.Source) { + m.Load(0, &x.refCount) +} + +func init() { + state.Register((*Device)(nil)) + state.Register((*tunEndpointRefs)(nil)) +} diff --git a/pkg/tcpip/link/tun/tun_unsafe_state_autogen.go b/pkg/tcpip/link/tun/tun_unsafe_state_autogen.go new file mode 100644 index 000000000..149299ea3 --- /dev/null +++ b/pkg/tcpip/link/tun/tun_unsafe_state_autogen.go @@ -0,0 +1,5 @@ +// automatically generated by stateify. + +// +build linux + +package tun diff --git a/pkg/tcpip/link/waitable/BUILD b/pkg/tcpip/link/waitable/BUILD deleted file mode 100644 index ee84c3d96..000000000 --- a/pkg/tcpip/link/waitable/BUILD +++ /dev/null @@ -1,32 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "waitable", - srcs = [ - "waitable.go", - ], - visibility = ["//visibility:public"], - deps = [ - "//pkg/gate", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) - -go_test( - name = "waitable_test", - srcs = [ - "waitable_test.go", - ], - library = ":waitable", - deps = [ - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/stack", - ], -) diff --git a/pkg/tcpip/link/waitable/waitable_state_autogen.go b/pkg/tcpip/link/waitable/waitable_state_autogen.go new file mode 100644 index 000000000..059424fa0 --- /dev/null +++ b/pkg/tcpip/link/waitable/waitable_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package waitable diff --git a/pkg/tcpip/link/waitable/waitable_test.go b/pkg/tcpip/link/waitable/waitable_test.go deleted file mode 100644 index 94827fc56..000000000 --- a/pkg/tcpip/link/waitable/waitable_test.go +++ /dev/null @@ -1,188 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package waitable - -import ( - "testing" - - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/buffer" - "gvisor.dev/gvisor/pkg/tcpip/header" - "gvisor.dev/gvisor/pkg/tcpip/stack" -) - -type countedEndpoint struct { - dispatchCount int - writeCount int - attachCount int - - mtu uint32 - capabilities stack.LinkEndpointCapabilities - hdrLen uint16 - linkAddr tcpip.LinkAddress - - dispatcher stack.NetworkDispatcher -} - -func (e *countedEndpoint) DeliverNetworkPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - e.dispatchCount++ -} - -func (e *countedEndpoint) DeliverOutboundPacket(remote, local tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - panic("unimplemented") -} - -func (e *countedEndpoint) Attach(dispatcher stack.NetworkDispatcher) { - e.attachCount++ - e.dispatcher = dispatcher -} - -// IsAttached implements stack.LinkEndpoint.IsAttached. -func (e *countedEndpoint) IsAttached() bool { - return e.dispatcher != nil -} - -func (e *countedEndpoint) MTU() uint32 { - return e.mtu -} - -func (e *countedEndpoint) Capabilities() stack.LinkEndpointCapabilities { - return e.capabilities -} - -func (e *countedEndpoint) MaxHeaderLength() uint16 { - return e.hdrLen -} - -func (e *countedEndpoint) LinkAddress() tcpip.LinkAddress { - return e.linkAddr -} - -func (e *countedEndpoint) WritePacket(r *stack.Route, _ *stack.GSO, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) *tcpip.Error { - e.writeCount++ - return nil -} - -// WritePackets implements stack.LinkEndpoint.WritePackets. -func (e *countedEndpoint) WritePackets(r *stack.Route, _ *stack.GSO, pkts stack.PacketBufferList, protocol tcpip.NetworkProtocolNumber) (int, *tcpip.Error) { - e.writeCount += pkts.Len() - return pkts.Len(), nil -} - -func (e *countedEndpoint) WriteRawPacket(buffer.VectorisedView) *tcpip.Error { - e.writeCount++ - return nil -} - -// ARPHardwareType implements stack.LinkEndpoint.ARPHardwareType. -func (*countedEndpoint) ARPHardwareType() header.ARPHardwareType { - panic("unimplemented") -} - -// Wait implements stack.LinkEndpoint.Wait. -func (*countedEndpoint) Wait() {} - -// AddHeader implements stack.LinkEndpoint.AddHeader. -func (e *countedEndpoint) AddHeader(local, remote tcpip.LinkAddress, protocol tcpip.NetworkProtocolNumber, pkt *stack.PacketBuffer) { - panic("unimplemented") -} - -func TestWaitWrite(t *testing.T) { - ep := &countedEndpoint{} - wep := New(ep) - - // Write and check that it goes through. - wep.WritePacket(nil, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 1; ep.writeCount != want { - t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want) - } - - // Wait on dispatches, then try to write. It must go through. - wep.WaitDispatch() - wep.WritePacket(nil, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 2; ep.writeCount != want { - t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want) - } - - // Wait on writes, then try to write. It must not go through. - wep.WaitWrite() - wep.WritePacket(nil, nil /* gso */, 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 2; ep.writeCount != want { - t.Fatalf("Unexpected writeCount: got=%v, want=%v", ep.writeCount, want) - } -} - -func TestWaitDispatch(t *testing.T) { - ep := &countedEndpoint{} - wep := New(ep) - - // Check that attach happens. - wep.Attach(ep) - if want := 1; ep.attachCount != want { - t.Fatalf("Unexpected attachCount: got=%v, want=%v", ep.attachCount, want) - } - - // Dispatch and check that it goes through. - ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 1; ep.dispatchCount != want { - t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want) - } - - // Wait on writes, then try to dispatch. It must go through. - wep.WaitWrite() - ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 2; ep.dispatchCount != want { - t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want) - } - - // Wait on dispatches, then try to dispatch. It must not go through. - wep.WaitDispatch() - ep.dispatcher.DeliverNetworkPacket("", "", 0, stack.NewPacketBuffer(stack.PacketBufferOptions{})) - if want := 2; ep.dispatchCount != want { - t.Fatalf("Unexpected dispatchCount: got=%v, want=%v", ep.dispatchCount, want) - } -} - -func TestOtherMethods(t *testing.T) { - const ( - mtu = 0xdead - capabilities = 0xbeef - hdrLen = 0x1234 - linkAddr = "test address" - ) - ep := &countedEndpoint{ - mtu: mtu, - capabilities: capabilities, - hdrLen: hdrLen, - linkAddr: linkAddr, - } - wep := New(ep) - - if v := wep.MTU(); v != mtu { - t.Fatalf("Unexpected mtu: got=%v, want=%v", v, mtu) - } - - if v := wep.Capabilities(); v != capabilities { - t.Fatalf("Unexpected capabilities: got=%v, want=%v", v, capabilities) - } - - if v := wep.MaxHeaderLength(); v != hdrLen { - t.Fatalf("Unexpected MaxHeaderLength: got=%v, want=%v", v, hdrLen) - } - - if v := wep.LinkAddress(); v != linkAddr { - t.Fatalf("Unexpected LinkAddress: got=%q, want=%q", v, linkAddr) - } -} |