2c4ae3b0a4
Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для неё не нужна. Module path github.com/sagernet/gvisor сохранён намеренно: на него опирается replace-директива суперпроекта. Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show и переносилась на новый пин копированием. SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH
127 lines
4.8 KiB
Go
127 lines
4.8 KiB
Go
// Copyright 2023 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 gasket describes the userspace interface for Gasket devices.
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package gasket
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import (
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"fmt"
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"github.com/sagernet/gvisor/pkg/abi/linux"
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)
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// Ioctl represents a gasket ioctl command.
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type Ioctl uint32
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// From https://github.com/tensorflow/tpu/blob/master/tools/driver/include/linux/google/gasket.h
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var (
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GASKET_IOCTL_BASE = uint32(0xDC)
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GASKET_IOCTL_RESET = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 0, SizeOfUnsignedLong))
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GASKET_IOCTL_SET_EVENTFD = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 1, SizeofGasketInterruptEventFd))
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GASKET_IOCTL_CLEAR_EVENTFD = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 2, SizeOfUnsignedLong))
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GASKET_IOCTL_NUMBER_PAGE_TABLES = Ioctl(linux.IOR(GASKET_IOCTL_BASE, 4, SizeOfUnsignedLong))
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GASKET_IOCTL_PAGE_TABLE_SIZE = Ioctl(linux.IOWR(GASKET_IOCTL_BASE, 5, SizeofGasketPageTableIoctl))
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GASKET_IOCTL_SIMPLE_PAGE_TABLE_SIZE = Ioctl(linux.IOWR(GASKET_IOCTL_BASE, 6, SizeofGasketPageTableIoctl))
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GASKET_IOCTL_PARTITION_PAGE_TABLE = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 7, SizeofGasketPageTableIoctl))
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GASKET_IOCTL_MAP_BUFFER = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 8, SizeofGasketPageTableIoctl))
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GASKET_IOCTL_UNMAP_BUFFER = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 9, SizeofGasketPageTableIoctl))
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GASKET_IOCTL_CLEAR_INTERRUPT_COUNTS = Ioctl(linux.IO(GASKET_IOCTL_BASE, 10))
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GASKET_IOCTL_REGISTER_INTERRUPT = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 11, SizeofGasketInterruptMapping))
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GASKET_IOCTL_UNREGISTER_INTERRUPT = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 12, SizeOfUnsignedLong))
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GASKET_IOCTL_MAP_DMA_BUF = Ioctl(linux.IOW(GASKET_IOCTL_BASE, 13, SizeofGasketPageTableDmaBufIoctl))
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)
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func (i Ioctl) String() string {
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switch i {
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case GASKET_IOCTL_RESET:
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return "GASKET_IOCTL_RESET"
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case GASKET_IOCTL_SET_EVENTFD:
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return "GASKET_IOCTL_SET_EVENTFD"
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case GASKET_IOCTL_CLEAR_EVENTFD:
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return "GASKET_IOCTL_CLEAR_EVENTFD"
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case GASKET_IOCTL_NUMBER_PAGE_TABLES:
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return "GASKET_IOCTL_NUMBER_PAGE_TABLES"
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case GASKET_IOCTL_PAGE_TABLE_SIZE:
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return "GASKET_IOCTL_PAGE_TABLE_SIZE"
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case GASKET_IOCTL_SIMPLE_PAGE_TABLE_SIZE:
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return "GASKET_IOCTL_SIMPLE_PAGE_TABLE_SIZE"
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case GASKET_IOCTL_PARTITION_PAGE_TABLE:
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return "GASKET_IOCTL_PARTITION_PAGE_TABLE"
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case GASKET_IOCTL_MAP_BUFFER:
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return "GASKET_IOCTL_MAP_BUFFER"
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case GASKET_IOCTL_UNMAP_BUFFER:
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return "GASKET_IOCTL_UNMAP_BUFFER"
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case GASKET_IOCTL_CLEAR_INTERRUPT_COUNTS:
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return "GASKET_IOCTL_CLEAR_INTERRUPT_COUNTS"
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case GASKET_IOCTL_REGISTER_INTERRUPT:
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return "GASKET_IOCTL_REGISTER_INTERRUPT"
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case GASKET_IOCTL_UNREGISTER_INTERRUPT:
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return "GASKET_IOCTL_UNREGISTER_INTERRUPT"
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case GASKET_IOCTL_MAP_DMA_BUF:
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return "GASKET_IOCTL_MAP_DMA_BUF"
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default:
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return fmt.Sprintf("UNKNOWN GASKET COMMAND %d", uint32(i))
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}
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}
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// GasketInterruptEventFd is the common structure for ioctls associating an
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// eventfd with a device interrupt, when using the Gasket interrupt module.
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//
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// +marshal
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type GasketInterruptEventFd struct {
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Interrupt uint64
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EventFD uint64
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}
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// GasketPageTableIoctl is a common structure for ioctls mapping and unmapping
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// buffers when using the Gasket page_table module.
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//
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// +marshal
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type GasketPageTableIoctl struct {
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PageTableIndex uint64
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Size uint64
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HostAddress uint64
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DeviceAddress uint64
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}
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// GasketInterruptMapping is a structure for ioctls associating an eventfd and
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// interrupt controlling bar register with a device interrupt, when using the
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// Gasket interrupt module.
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//
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// +marshal
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type GasketInterruptMapping struct {
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Interrupt uint64
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EventFD uint64
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BarIndex uint64
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RegOffset uint64
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}
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// GasketPageTableDmaBufIoctl is a structure for dma_buf mapping ioctl
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// parameters.
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//
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// +marshal
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type GasketPageTableDmaBufIoctl struct {
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PageTableIndex uint64
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DeviceAddress uint64
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DMABufID int32 `marshal:"unaligned"` // Struct ends mid 64bit word.
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}
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// Ioctl parameter struct sizes.
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var (
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SizeofGasketInterruptEventFd = uint32((*GasketInterruptEventFd)(nil).SizeBytes())
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SizeofGasketPageTableIoctl = uint32((*GasketPageTableIoctl)(nil).SizeBytes())
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SizeofGasketInterruptMapping = uint32((*GasketInterruptMapping)(nil).SizeBytes())
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SizeofGasketPageTableDmaBufIoctl = uint32((*GasketPageTableDmaBufIoctl)(nil).SizeBytes())
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SizeOfUnsignedLong = uint32(8)
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)
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