77 lines
1.7 KiB
Go
77 lines
1.7 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 "encoding/binary"
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// AIORingSize is sizeof(struct aio_ring).
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const AIORingSize = 32
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// I/O commands.
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const (
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IOCB_CMD_PREAD = 0
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IOCB_CMD_PWRITE = 1
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IOCB_CMD_FSYNC = 2
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IOCB_CMD_FDSYNC = 3
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// 4 was the experimental IOCB_CMD_PREADX.
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IOCB_CMD_POLL = 5
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IOCB_CMD_NOOP = 6
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IOCB_CMD_PREADV = 7
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IOCB_CMD_PWRITEV = 8
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)
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// I/O flags.
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const (
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IOCB_FLAG_RESFD = 1
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IOCB_FLAG_IOPRIO = 2
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)
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// IOCallback describes an I/O request.
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//
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// The priority field is currently ignored in the implementation below. Also
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// note that the IOCB_FLAG_RESFD feature is not supported.
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type IOCallback struct {
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Data uint64
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Key uint32
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_ uint32
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OpCode uint16
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ReqPrio int16
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FD int32
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Buf uint64
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Bytes uint64
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Offset int64
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Reserved2 uint64
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Flags uint32
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// eventfd to signal if IOCB_FLAG_RESFD is set in flags.
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ResFD int32
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}
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// IOEvent describes an I/O result.
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//
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// +stateify savable
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type IOEvent struct {
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Data uint64
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Obj uint64
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Result int64
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Result2 int64
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}
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// IOEventSize is the size of an ioEvent encoded.
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var IOEventSize = binary.Size(IOEvent{})
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