1 files changed, 0 insertions, 338 deletions
diff --git a/pkg/sentry/fsimpl/proc/net.go b/pkg/sentry/fsimpl/proc/net.go
deleted file mode 100644
index fd46eebf8..000000000
--- a/pkg/sentry/fsimpl/proc/net.go
+++ /dev/null
@@ -1,338 +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 proc
-
-import (
-	"bytes"
-	"fmt"
-
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/binary"
-	"gvisor.dev/gvisor/pkg/log"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/fs"
-	"gvisor.dev/gvisor/pkg/sentry/inet"
-	"gvisor.dev/gvisor/pkg/sentry/kernel"
-	"gvisor.dev/gvisor/pkg/sentry/socket"
-	"gvisor.dev/gvisor/pkg/sentry/socket/unix"
-	"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
-	"gvisor.dev/gvisor/pkg/sentry/vfs"
-)
-
-// ifinet6 implements vfs.DynamicBytesSource for /proc/net/if_inet6.
-//
-// +stateify savable
-type ifinet6 struct {
-	s inet.Stack
-}
-
-var _ vfs.DynamicBytesSource = (*ifinet6)(nil)
-
-func (n *ifinet6) contents() []string {
-	var lines []string
-	nics := n.s.Interfaces()
-	for id, naddrs := range n.s.InterfaceAddrs() {
-		nic, ok := nics[id]
-		if !ok {
-			// NIC was added after NICNames was called. We'll just
-			// ignore it.
-			continue
-		}
-
-		for _, a := range naddrs {
-			// IPv6 only.
-			if a.Family != linux.AF_INET6 {
-				continue
-			}
-
-			// Fields:
-			// IPv6 address displayed in 32 hexadecimal chars without colons
-			// Netlink device number (interface index) in hexadecimal (use nic id)
-			// Prefix length in hexadecimal
-			// Scope value (use 0)
-			// Interface flags
-			// Device name
-			lines = append(lines, fmt.Sprintf("%032x %02x %02x %02x %02x %8s\n", a.Addr, id, a.PrefixLen, 0, a.Flags, nic.Name))
-		}
-	}
-	return lines
-}
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (n *ifinet6) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	for _, l := range n.contents() {
-		buf.WriteString(l)
-	}
-	return nil
-}
-
-// netDev implements vfs.DynamicBytesSource for /proc/net/dev.
-//
-// +stateify savable
-type netDev struct {
-	s inet.Stack
-}
-
-var _ vfs.DynamicBytesSource = (*netDev)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (n *netDev) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	interfaces := n.s.Interfaces()
-	buf.WriteString("Inter-|   Receive                                                |  Transmit\n")
-	buf.WriteString(" face |bytes    packets errs drop fifo frame compressed multicast|bytes    packets errs drop fifo colls carrier compressed\n")
-
-	for _, i := range interfaces {
-		// Implements the same format as
-		// net/core/net-procfs.c:dev_seq_printf_stats.
-		var stats inet.StatDev
-		if err := n.s.Statistics(&stats, i.Name); err != nil {
-			log.Warningf("Failed to retrieve interface statistics for %v: %v", i.Name, err)
-			continue
-		}
-		fmt.Fprintf(
-			buf,
-			"%6s: %7d %7d %4d %4d %4d %5d %10d %9d %8d %7d %4d %4d %4d %5d %7d %10d\n",
-			i.Name,
-			// Received
-			stats[0], // bytes
-			stats[1], // packets
-			stats[2], // errors
-			stats[3], // dropped
-			stats[4], // fifo
-			stats[5], // frame
-			stats[6], // compressed
-			stats[7], // multicast
-			// Transmitted
-			stats[8],  // bytes
-			stats[9],  // packets
-			stats[10], // errors
-			stats[11], // dropped
-			stats[12], // fifo
-			stats[13], // frame
-			stats[14], // compressed
-			stats[15], // multicast
-		)
-	}
-
-	return nil
-}
-
-// netUnix implements vfs.DynamicBytesSource for /proc/net/unix.
-//
-// +stateify savable
-type netUnix struct {
-	k *kernel.Kernel
-}
-
-var _ vfs.DynamicBytesSource = (*netUnix)(nil)
-
-// Generate implements vfs.DynamicBytesSource.Generate.
-func (n *netUnix) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	buf.WriteString("Num       RefCount Protocol Flags    Type St Inode Path\n")
-	for _, se := range n.k.ListSockets() {
-		s := se.Sock.Get()
-		if s == nil {
-			log.Debugf("Couldn't resolve weakref %v in socket table, racing with destruction?", se.Sock)
-			continue
-		}
-		sfile := s.(*fs.File)
-		if family, _, _ := sfile.FileOperations.(socket.Socket).Type(); family != linux.AF_UNIX {
-			s.DecRef()
-			// Not a unix socket.
-			continue
-		}
-		sops := sfile.FileOperations.(*unix.SocketOperations)
-
-		addr, err := sops.Endpoint().GetLocalAddress()
-		if err != nil {
-			log.Warningf("Failed to retrieve socket name from %+v: %v", sfile, err)
-			addr.Addr = "<unknown>"
-		}
-
-		sockFlags := 0
-		if ce, ok := sops.Endpoint().(transport.ConnectingEndpoint); ok {
-			if ce.Listening() {
-				// For unix domain sockets, linux reports a single flag
-				// value if the socket is listening, of __SO_ACCEPTCON.
-				sockFlags = linux.SO_ACCEPTCON
-			}
-		}
-
-		// In the socket entry below, the value for the 'Num' field requires
-		// some consideration. Linux prints the address to the struct
-		// unix_sock representing a socket in the kernel, but may redact the
-		// value for unprivileged users depending on the kptr_restrict
-		// sysctl.
-		//
-		// One use for this field is to allow a privileged user to
-		// introspect into the kernel memory to determine information about
-		// a socket not available through procfs, such as the socket's peer.
-		//
-		// In gvisor, returning a pointer to our internal structures would
-		// be pointless, as it wouldn't match the memory layout for struct
-		// unix_sock, making introspection difficult. We could populate a
-		// struct unix_sock with the appropriate data, but even that
-		// requires consideration for which kernel version to emulate, as
-		// the definition of this struct changes over time.
-		//
-		// For now, we always redact this pointer.
-		fmt.Fprintf(buf, "%#016p: %08X %08X %08X %04X %02X %5d",
-			(*unix.SocketOperations)(nil), // Num, pointer to kernel socket struct.
-			sfile.ReadRefs()-1,            // RefCount, don't count our own ref.
-			0,                             // Protocol, always 0 for UDS.
-			sockFlags,                     // Flags.
-			sops.Endpoint().Type(),        // Type.
-			sops.State(),                  // State.
-			sfile.InodeID(),               // Inode.
-		)
-
-		// Path
-		if len(addr.Addr) != 0 {
-			if addr.Addr[0] == 0 {
-				// Abstract path.
-				fmt.Fprintf(buf, " @%s", string(addr.Addr[1:]))
-			} else {
-				fmt.Fprintf(buf, " %s", string(addr.Addr))
-			}
-		}
-		fmt.Fprintf(buf, "\n")
-
-		s.DecRef()
-	}
-	return nil
-}
-
-// netTCP implements vfs.DynamicBytesSource for /proc/net/tcp.
-//
-// +stateify savable
-type netTCP struct {
-	k *kernel.Kernel
-}
-
-var _ vfs.DynamicBytesSource = (*netTCP)(nil)
-
-func (n *netTCP) Generate(ctx context.Context, buf *bytes.Buffer) error {
-	t := kernel.TaskFromContext(ctx)
-	buf.WriteString("  sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt   uid  timeout inode                                                     \n")
-	for _, se := range n.k.ListSockets() {
-		s := se.Sock.Get()
-		if s == nil {
-			log.Debugf("Couldn't resolve weakref %+v in socket table, racing with destruction?", se.Sock)
-			continue
-		}
-		sfile := s.(*fs.File)
-		sops, ok := sfile.FileOperations.(socket.Socket)
-		if !ok {
-			panic(fmt.Sprintf("Found non-socket file in socket table: %+v", sfile))
-		}
-		if family, stype, _ := sops.Type(); !(family == linux.AF_INET && stype == linux.SOCK_STREAM) {
-			s.DecRef()
-			// Not tcp4 sockets.
-			continue
-		}
-
-		// Linux's documentation for the fields below can be found at
-		// https://www.kernel.org/doc/Documentation/networking/proc_net_tcp.txt.
-		// For Linux's implementation, see net/ipv4/tcp_ipv4.c:get_tcp4_sock().
-		// Note that the header doesn't contain labels for all the fields.
-
-		// Field: sl; entry number.
-		fmt.Fprintf(buf, "%4d: ", se.ID)
-
-		portBuf := make([]byte, 2)
-
-		// Field: local_adddress.
-		var localAddr linux.SockAddrInet
-		if local, _, err := sops.GetSockName(t); err == nil {
-			localAddr = *local.(*linux.SockAddrInet)
-		}
-		binary.LittleEndian.PutUint16(portBuf, localAddr.Port)
-		fmt.Fprintf(buf, "%08X:%04X ",
-			binary.LittleEndian.Uint32(localAddr.Addr[:]),
-			portBuf)
-
-		// Field: rem_address.
-		var remoteAddr linux.SockAddrInet
-		if remote, _, err := sops.GetPeerName(t); err == nil {
-			remoteAddr = *remote.(*linux.SockAddrInet)
-		}
-		binary.LittleEndian.PutUint16(portBuf, remoteAddr.Port)
-		fmt.Fprintf(buf, "%08X:%04X ",
-			binary.LittleEndian.Uint32(remoteAddr.Addr[:]),
-			portBuf)
-
-		// Field: state; socket state.
-		fmt.Fprintf(buf, "%02X ", sops.State())
-
-		// Field: tx_queue, rx_queue; number of packets in the transmit and
-		// receive queue. Unimplemented.
-		fmt.Fprintf(buf, "%08X:%08X ", 0, 0)
-
-		// Field: tr, tm->when; timer active state and number of jiffies
-		// until timer expires. Unimplemented.
-		fmt.Fprintf(buf, "%02X:%08X ", 0, 0)
-
-		// Field: retrnsmt; number of unrecovered RTO timeouts.
-		// Unimplemented.
-		fmt.Fprintf(buf, "%08X ", 0)
-
-		// Field: uid.
-		uattr, err := sfile.Dirent.Inode.UnstableAttr(ctx)
-		if err != nil {
-			log.Warningf("Failed to retrieve unstable attr for socket file: %v", err)
-			fmt.Fprintf(buf, "%5d ", 0)
-		} else {
-			fmt.Fprintf(buf, "%5d ", uint32(uattr.Owner.UID.In(t.UserNamespace()).OrOverflow()))
-		}
-
-		// Field: timeout; number of unanswered 0-window probes.
-		// Unimplemented.
-		fmt.Fprintf(buf, "%8d ", 0)
-
-		// Field: inode.
-		fmt.Fprintf(buf, "%8d ", sfile.InodeID())
-
-		// Field: refcount. Don't count the ref we obtain while deferencing
-		// the weakref to this socket.
-		fmt.Fprintf(buf, "%d ", sfile.ReadRefs()-1)
-
-		// Field: Socket struct address. Redacted due to the same reason as
-		// the 'Num' field in /proc/net/unix, see netUnix.ReadSeqFileData.
-		fmt.Fprintf(buf, "%#016p ", (*socket.Socket)(nil))
-
-		// Field: retransmit timeout. Unimplemented.
-		fmt.Fprintf(buf, "%d ", 0)
-
-		// Field: predicted tick of soft clock (delayed ACK control data).
-		// Unimplemented.
-		fmt.Fprintf(buf, "%d ", 0)
-
-		// Field: (ack.quick<<1)|ack.pingpong, Unimplemented.
-		fmt.Fprintf(buf, "%d ", 0)
-
-		// Field: sending congestion window, Unimplemented.
-		fmt.Fprintf(buf, "%d ", 0)
-
-		// Field: Slow start size threshold, -1 if threshold >= 0xFFFF.
-		// Unimplemented, report as large threshold.
-		fmt.Fprintf(buf, "%d", -1)
-
-		fmt.Fprintf(buf, "\n")
-
-		s.DecRef()
-	}
-
-	return nil
-}