mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Ayush RanjanandgVisor bot
c7f074fc3b
Change marshal.Marshallable method signatures to return the remaining buffer. This makes it easier to implement these method manually. Without this, we would have to manually do buffer shifting which is error prone. tools/go_marshal/test:benchmark test does not show change in performance. Additionally fixed some marshalling bugs in fsimpl/fuse. Updated multiple callpoints to get rid of redundant slice indexing work and simplified code using this new signature. Updates #6450 PiperOrigin-RevId: 407857019
109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
// Copyright 2021 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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"gvisor.dev/gvisor/pkg/marshal/primitive"
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)
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// Linux-specific control commands. Source: include/uapi/linux/msg.h
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const (
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MSG_STAT = 11
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MSG_INFO = 12
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MSG_STAT_ANY = 13
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)
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// msgrcv(2) options. Source: include/uapi/linux/msg.h
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const (
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MSG_NOERROR = 010000 // No error if message is too big.
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MSG_EXCEPT = 020000 // Receive any message except of specified type.
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MSG_COPY = 040000 // Copy (not remove) all queue messages.
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)
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// System-wide limits for message queues. Source: include/uapi/linux/msg.h
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const (
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MSGMNI = 32000 // Maximum number of message queue identifiers.
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MSGMAX = 8192 // Maximum size of message (bytes).
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MSGMNB = 16384 // Default max size of a message queue.
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)
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// System-wide limits. Unused. Source: include/uapi/linux/msg.h
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const (
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MSGPOOL = (MSGMNI * MSGMNB / 1024)
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MSGTQL = MSGMNB
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MSGMAP = MSGMNB
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MSGSSZ = 16
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// MSGSEG is simplified due to the inexistance of a ternary operator.
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MSGSEG = 0xffff
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)
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// MsqidDS is equivelant to struct msqid64_ds. Source:
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// include/uapi/asm-generic/shmbuf.h
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//
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// +marshal
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type MsqidDS struct {
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MsgPerm IPCPerm // IPC permissions.
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MsgStime TimeT // Last msgsnd time.
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MsgRtime TimeT // Last msgrcv time.
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MsgCtime TimeT // Last change time.
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MsgCbytes uint64 // Current number of bytes on the queue.
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MsgQnum uint64 // Number of messages in the queue.
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MsgQbytes uint64 // Max number of bytes in the queue.
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MsgLspid int32 // PID of last msgsnd.
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MsgLrpid int32 // PID of last msgrcv.
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unused4 uint64
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unused5 uint64
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}
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// MsgBuf is equivelant to struct msgbuf. Source: include/uapi/linux/msg.h
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//
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// +marshal dynamic
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type MsgBuf struct {
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Type primitive.Int64
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Text primitive.ByteSlice
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}
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// SizeBytes implements marshal.Marshallable.SizeBytes.
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func (b *MsgBuf) SizeBytes() int {
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return b.Type.SizeBytes() + b.Text.SizeBytes()
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}
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// MarshalBytes implements marshal.Marshallable.MarshalBytes.
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func (b *MsgBuf) MarshalBytes(dst []byte) []byte {
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dst = b.Type.MarshalUnsafe(dst)
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return b.Text.MarshalBytes(dst)
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}
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// UnmarshalBytes implements marshal.Marshallable.UnmarshalBytes.
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func (b *MsgBuf) UnmarshalBytes(src []byte) []byte {
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src = b.Type.UnmarshalUnsafe(src)
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return b.Text.UnmarshalBytes(src)
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}
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// MsgInfo is equivelant to struct msginfo. Source: include/uapi/linux/msg.h
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//
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// +marshal
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type MsgInfo struct {
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MsgPool int32
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MsgMap int32
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MsgMax int32
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MsgMnb int32
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MsgMni int32
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MsgSsz int32
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MsgTql int32
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MsgSeg uint16 `marshal:"unaligned"`
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}
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