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-rw-r--r--pkg/sentry/fs/proc/sys_net.go16
-rw-r--r--pkg/sentry/fs/proc/sys_net_state.go6
-rw-r--r--pkg/sentry/fsimpl/proc/tasks_sys.go18
-rw-r--r--pkg/sentry/fsimpl/proc/tasks_sys_test.go2
-rw-r--r--pkg/sentry/inet/inet.go3
-rw-r--r--pkg/sentry/inet/test_stack.go5
-rw-r--r--pkg/sentry/socket/hostinet/BUILD2
-rw-r--r--pkg/sentry/socket/hostinet/stack.go24
-rw-r--r--pkg/sentry/socket/netstack/stack.go10
9 files changed, 12 insertions, 74 deletions
diff --git a/pkg/sentry/fs/proc/sys_net.go b/pkg/sentry/fs/proc/sys_net.go
index 1d09afdd7..4893af56b 100644
--- a/pkg/sentry/fs/proc/sys_net.go
+++ b/pkg/sentry/fs/proc/sys_net.go
@@ -403,7 +403,7 @@ type ipForwarding struct {
// enabled stores the IPv4 forwarding state on save.
// We must save/restore this here, since a netstack instance
// is created on restore.
- enabled *bool
+ enabled bool
}
func newIPForwardingInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *fs.Inode {
@@ -461,13 +461,8 @@ func (f *ipForwardingFile) Read(ctx context.Context, _ *fs.File, dst usermem.IOS
return 0, io.EOF
}
- if f.ipf.enabled == nil {
- enabled := f.stack.Forwarding(ipv4.ProtocolNumber)
- f.ipf.enabled = &enabled
- }
-
val := "0\n"
- if *f.ipf.enabled {
+ if f.ipf.enabled {
// Technically, this is not quite compatible with Linux. Linux
// stores these as an integer, so if you write "2" into
// ip_forward, you should get 2 back.
@@ -494,11 +489,8 @@ func (f *ipForwardingFile) Write(ctx context.Context, _ *fs.File, src usermem.IO
if err != nil {
return n, err
}
- if f.ipf.enabled == nil {
- f.ipf.enabled = new(bool)
- }
- *f.ipf.enabled = v != 0
- return n, f.stack.SetForwarding(ipv4.ProtocolNumber, *f.ipf.enabled)
+ f.ipf.enabled = v != 0
+ return n, f.stack.SetForwarding(ipv4.ProtocolNumber, f.ipf.enabled)
}
// portRangeInode implements fs.InodeOperations. It provides and allows
diff --git a/pkg/sentry/fs/proc/sys_net_state.go b/pkg/sentry/fs/proc/sys_net_state.go
index 4cb4741af..51d2be647 100644
--- a/pkg/sentry/fs/proc/sys_net_state.go
+++ b/pkg/sentry/fs/proc/sys_net_state.go
@@ -47,9 +47,7 @@ func (s *tcpSack) afterLoad() {
// afterLoad is invoked by stateify.
func (ipf *ipForwarding) afterLoad() {
- if ipf.enabled != nil {
- if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, *ipf.enabled); err != nil {
- panic(fmt.Sprintf("failed to set IPv4 forwarding [%v]: %v", *ipf.enabled, err))
- }
+ if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, ipf.enabled); err != nil {
+ panic(fmt.Sprintf("ipf.stack.SetForwarding(%d, %t): %s", ipv4.ProtocolNumber, ipf.enabled, err))
}
}
diff --git a/pkg/sentry/fsimpl/proc/tasks_sys.go b/pkg/sentry/fsimpl/proc/tasks_sys.go
index 9b14dd6b9..88ab49048 100644
--- a/pkg/sentry/fsimpl/proc/tasks_sys.go
+++ b/pkg/sentry/fsimpl/proc/tasks_sys.go
@@ -365,27 +365,22 @@ func (d *tcpMemData) writeSizeLocked(size inet.TCPBufferSize) error {
}
// ipForwarding implements vfs.WritableDynamicBytesSource for
-// /proc/sys/net/ipv4/ip_forwarding.
+// /proc/sys/net/ipv4/ip_forward.
//
// +stateify savable
type ipForwarding struct {
kernfs.DynamicBytesFile
stack inet.Stack `state:"wait"`
- enabled *bool
+ enabled bool
}
var _ vfs.WritableDynamicBytesSource = (*ipForwarding)(nil)
// Generate implements vfs.DynamicBytesSource.Generate.
func (ipf *ipForwarding) Generate(ctx context.Context, buf *bytes.Buffer) error {
- if ipf.enabled == nil {
- enabled := ipf.stack.Forwarding(ipv4.ProtocolNumber)
- ipf.enabled = &enabled
- }
-
val := "0\n"
- if *ipf.enabled {
+ if ipf.enabled {
// Technically, this is not quite compatible with Linux. Linux stores these
// as an integer, so if you write "2" into tcp_sack, you should get 2 back.
// Tough luck.
@@ -414,11 +409,8 @@ func (ipf *ipForwarding) Write(ctx context.Context, src usermem.IOSequence, offs
if err != nil {
return 0, err
}
- if ipf.enabled == nil {
- ipf.enabled = new(bool)
- }
- *ipf.enabled = v != 0
- if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, *ipf.enabled); err != nil {
+ ipf.enabled = v != 0
+ if err := ipf.stack.SetForwarding(ipv4.ProtocolNumber, ipf.enabled); err != nil {
return 0, err
}
return n, nil
diff --git a/pkg/sentry/fsimpl/proc/tasks_sys_test.go b/pkg/sentry/fsimpl/proc/tasks_sys_test.go
index 6cee22823..19b012f7d 100644
--- a/pkg/sentry/fsimpl/proc/tasks_sys_test.go
+++ b/pkg/sentry/fsimpl/proc/tasks_sys_test.go
@@ -132,7 +132,7 @@ func TestConfigureIPForwarding(t *testing.T) {
t.Run(c.comment, func(t *testing.T) {
s.IPForwarding = c.initial
- file := &ipForwarding{stack: s, enabled: &c.initial}
+ file := &ipForwarding{stack: s, enabled: c.initial}
// Write the values.
src := usermem.BytesIOSequence([]byte(c.str))
diff --git a/pkg/sentry/inet/inet.go b/pkg/sentry/inet/inet.go
index 6b71bd3a9..80dda1559 100644
--- a/pkg/sentry/inet/inet.go
+++ b/pkg/sentry/inet/inet.go
@@ -88,9 +88,6 @@ type Stack interface {
// for restoring a stack after a save.
RestoreCleanupEndpoints([]stack.TransportEndpoint)
- // Forwarding returns if packet forwarding between NICs is enabled.
- Forwarding(protocol tcpip.NetworkProtocolNumber) bool
-
// SetForwarding enables or disables packet forwarding between NICs.
SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error
diff --git a/pkg/sentry/inet/test_stack.go b/pkg/sentry/inet/test_stack.go
index 03e2608c2..218d9dafc 100644
--- a/pkg/sentry/inet/test_stack.go
+++ b/pkg/sentry/inet/test_stack.go
@@ -154,11 +154,6 @@ func (s *TestStack) CleanupEndpoints() []stack.TransportEndpoint {
// RestoreCleanupEndpoints implements inet.Stack.RestoreCleanupEndpoints.
func (s *TestStack) RestoreCleanupEndpoints([]stack.TransportEndpoint) {}
-// Forwarding implements inet.Stack.Forwarding.
-func (s *TestStack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool {
- return s.IPForwarding
-}
-
// SetForwarding implements inet.Stack.SetForwarding.
func (s *TestStack) SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error {
s.IPForwarding = enable
diff --git a/pkg/sentry/socket/hostinet/BUILD b/pkg/sentry/socket/hostinet/BUILD
index 2e3064565..3c6511ead 100644
--- a/pkg/sentry/socket/hostinet/BUILD
+++ b/pkg/sentry/socket/hostinet/BUILD
@@ -39,8 +39,6 @@ go_library(
"//pkg/syserr",
"//pkg/syserror",
"//pkg/tcpip",
- "//pkg/tcpip/network/ipv4",
- "//pkg/tcpip/network/ipv6",
"//pkg/tcpip/stack",
"//pkg/usermem",
"//pkg/waiter",
diff --git a/pkg/sentry/socket/hostinet/stack.go b/pkg/sentry/socket/hostinet/stack.go
index 393a1ab3a..cbb1e905d 100644
--- a/pkg/sentry/socket/hostinet/stack.go
+++ b/pkg/sentry/socket/hostinet/stack.go
@@ -35,8 +35,6 @@ import (
"gvisor.dev/gvisor/pkg/syserr"
"gvisor.dev/gvisor/pkg/syserror"
"gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
- "gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/usermem"
)
@@ -66,8 +64,6 @@ type Stack struct {
tcpSACKEnabled bool
netDevFile *os.File
netSNMPFile *os.File
- ipv4Forwarding bool
- ipv6Forwarding bool
}
// NewStack returns an empty Stack containing no configuration.
@@ -127,13 +123,6 @@ func (s *Stack) Configure() error {
s.netSNMPFile = f
}
- s.ipv6Forwarding = false
- if ipForwarding, err := ioutil.ReadFile("/proc/sys/net/ipv6/conf/all/forwarding"); err == nil {
- s.ipv6Forwarding = strings.TrimSpace(string(ipForwarding)) != "0"
- } else {
- log.Warningf("Failed to read if ipv6 forwarding is enabled, setting to false")
- }
-
return nil
}
@@ -492,19 +481,6 @@ func (s *Stack) CleanupEndpoints() []stack.TransportEndpoint { return nil }
// RestoreCleanupEndpoints implements inet.Stack.RestoreCleanupEndpoints.
func (s *Stack) RestoreCleanupEndpoints([]stack.TransportEndpoint) {}
-// Forwarding implements inet.Stack.Forwarding.
-func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool {
- switch protocol {
- case ipv4.ProtocolNumber:
- return s.ipv4Forwarding
- case ipv6.ProtocolNumber:
- return s.ipv6Forwarding
- default:
- log.Warningf("Forwarding(%v) failed: unsupported protocol", protocol)
- return false
- }
-}
-
// SetForwarding implements inet.Stack.SetForwarding.
func (s *Stack) SetForwarding(tcpip.NetworkProtocolNumber, bool) error {
return syserror.EACCES
diff --git a/pkg/sentry/socket/netstack/stack.go b/pkg/sentry/socket/netstack/stack.go
index 9cc1c57d7..eef5e6519 100644
--- a/pkg/sentry/socket/netstack/stack.go
+++ b/pkg/sentry/socket/netstack/stack.go
@@ -458,16 +458,6 @@ func (s *Stack) RestoreCleanupEndpoints(es []stack.TransportEndpoint) {
s.Stack.RestoreCleanupEndpoints(es)
}
-// Forwarding implements inet.Stack.Forwarding.
-func (s *Stack) Forwarding(protocol tcpip.NetworkProtocolNumber) bool {
- switch protocol {
- case ipv4.ProtocolNumber, ipv6.ProtocolNumber:
- return s.Stack.Forwarding(protocol)
- default:
- panic(fmt.Sprintf("Forwarding(%v) failed: unsupported protocol", protocol))
- }
-}
-
// SetForwarding implements inet.Stack.SetForwarding.
func (s *Stack) SetForwarding(protocol tcpip.NetworkProtocolNumber, enable bool) error {
if err := s.Stack.SetForwardingDefaultAndAllNICs(protocol, enable); err != nil {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 15:04:02 +0000