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Etienne PerotandgVisor bot
056a85f39d
This change marks all ABI-related structs with `structs.HostLayout`, which was introduced in Go 1.23: https://pkg.go.dev/[email protected]#HostLayout This is intended to force the Go compiler to preserve the layout of the struct, removing it from the liberty of reordering fields as it sees fit. Adds a check automatically generated by our `go_library` rule wrapper which verifies this recursively for all exported structs in a package. Fixes issue #10693. PiperOrigin-RevId: 860238103
138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package linux
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import (
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"structs"
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)
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const (
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// IFNAMSIZ is the size of the name field for IFReq.
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IFNAMSIZ = 16
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)
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// IFReq is an interface request.
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//
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// +marshal
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type IFReq struct {
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_ structs.HostLayout
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// IFName is an encoded name, normally null-terminated. This should be
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// accessed via the Name and SetName functions.
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IFName [IFNAMSIZ]byte
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// Data is the union of the following structures:
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//
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// struct sockaddr ifr_addr;
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// struct sockaddr ifr_dstaddr;
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// struct sockaddr ifr_broadaddr;
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// struct sockaddr ifr_netmask;
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// struct sockaddr ifr_hwaddr;
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// short ifr_flags;
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// int ifr_ifindex;
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// int ifr_metric;
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// int ifr_mtu;
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// struct ifmap ifr_map;
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// char ifr_slave[IFNAMSIZ];
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// char ifr_newname[IFNAMSIZ];
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// char *ifr_data;
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Data [24]byte
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}
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// Name returns the name.
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func (ifr *IFReq) Name() string {
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for c := 0; c < len(ifr.IFName); c++ {
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if ifr.IFName[c] == 0 {
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return string(ifr.IFName[:c])
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}
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}
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return string(ifr.IFName[:])
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}
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// SetName sets the name.
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func (ifr *IFReq) SetName(name string) {
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n := copy(ifr.IFName[:], []byte(name))
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clear(ifr.IFName[n:])
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}
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// SizeOfIFReq is the binary size of an IFReq struct (40 bytes).
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var SizeOfIFReq = (*IFReq)(nil).SizeBytes()
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// IFMap contains interface hardware parameters.
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type IFMap struct {
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_ structs.HostLayout
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MemStart uint64
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MemEnd uint64
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BaseAddr int16
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IRQ byte
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DMA byte
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Port byte
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_ [3]byte // Pad to sizeof(struct ifmap).
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}
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// IFConf is used to return a list of interfaces and their addresses. See
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// netdevice(7) and struct ifconf for more detail on its use.
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//
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// +marshal
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type IFConf struct {
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_ structs.HostLayout
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Len int32
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_ [4]byte // Pad to sizeof(struct ifconf).
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Ptr uint64
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}
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// SizeOfIFConf is the binary size of an IFConf struct (16 bytes).
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var SizeOfIFConf = (*IFConf)(nil).SizeBytes()
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// EthtoolCmd is a marshallable type to be able to easily copyin the
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// the command for an SIOCETHTOOL ioctl.
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//
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// +marshal
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type EthtoolCmd uint32
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const (
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// ETHTOOL_GFEATURES is the command to SIOCETHTOOL to query device
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// features.
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// See: <linux/ethtool.h>
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ETHTOOL_GFEATURES EthtoolCmd = 0x3a
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)
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// EthtoolGFeatures is used to return a list of device features.
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// See: <linux/ethtool.h>
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//
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// +marshal
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type EthtoolGFeatures struct {
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_ structs.HostLayout
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Cmd uint32
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Size uint32
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}
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// EthtoolGetFeaturesBlock is used to return state of upto 32 device
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// features.
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// See: <linux/ethtool.h>
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//
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// +marshal
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type EthtoolGetFeaturesBlock struct {
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_ structs.HostLayout
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Available uint32
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Requested uint32
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Active uint32
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NeverChanged uint32
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}
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const (
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// LOOPBACK_IFINDEX is defined in include/net/flow.h.
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LOOPBACK_IFINDEX = 1
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)
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