snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1
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
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215
pkg/abi/linux/vfio.go
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pkg/abi/linux/vfio.go
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// Copyright 2024 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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// The package implements VFIOuserspace driver interface.
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package linux
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// For IOCTLs requests from include/uapi/linux/vfio.h.
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const (
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VFIO_TYPE = ';'
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VFIO_BASE = 100
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// VFIO extensions.
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VFIO_TYPE1_IOMMU = 1
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VFIO_SPAPR_TCE_IOMMU = 2
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VFIO_TYPE1v2_IOMMU = 3
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)
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// VFIO device info flags.
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const (
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// Device supports reset.
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VFIO_DEVICE_FLAGS_RESET = 1 << iota
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// VFIO-pci device.
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VFIO_DEVICE_FLAGS_PCI
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// VFIO-platform device.
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VFIO_DEVICE_FLAGS_PLATFORM
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// VFIO-amba device.
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VFIO_DEVICE_FLAGS_AMBA
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// VFIO-ccw device.
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VFIO_DEVICE_FLAGS_CCW
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// VFIO-ap device.
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VFIO_DEVICE_FLAGS_AP
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// VFIO-fsl-mc device.
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VFIO_DEVICE_FLAGS_FSL_MC
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// Info supports caps.
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VFIO_DEVICE_FLAGS_CAPS
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// VFIO-cdx device.
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VFIO_DEVICE_FLAGS_CDX
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)
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// VFIO region info flags.
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const (
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// Region supports read.
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VFIO_REGION_INFO_FLAG_READ = 1 << iota
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// Region supports write.
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VFIO_REGION_INFO_FLAG_WRITE
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// Region supports mmap.
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VFIO_REGION_INFO_FLAG_MMAP
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// Info supports caps.
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VFIO_REGION_INFO_FLAG_CAPS
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)
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// VFIOIrqInfo flags.
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const (
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VFIO_IRQ_INFO_EVENTFD = 1 << iota
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VFIO_IRQ_INFO_MASKABLE
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VFIO_IRQ_INFO_AUTOMASKED
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VFIO_IRQ_INFO_NORESIZE
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)
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// VFIOIrqSet flags.
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const (
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VFIO_IRQ_SET_DATA_NONE = 1 << iota
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VFIO_IRQ_SET_DATA_BOOL
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VFIO_IRQ_SET_DATA_EVENTFD
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VFIO_IRQ_SET_ACTION_MASK
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VFIO_IRQ_SET_ACTION_UNMASK
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VFIO_IRQ_SET_ACTION_TRIGGER
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VFIO_IRQ_SET_DATA_TYPE_MASK = VFIO_IRQ_SET_DATA_NONE |
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VFIO_IRQ_SET_DATA_BOOL |
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VFIO_IRQ_SET_DATA_EVENTFD
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VFIO_IRQ_SET_ACTION_TYPE_MASK = VFIO_IRQ_SET_ACTION_MASK |
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VFIO_IRQ_SET_ACTION_UNMASK |
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VFIO_IRQ_SET_ACTION_TRIGGER
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)
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// VFIOIrqSet index.
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const (
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VFIO_PCI_INTX_IRQ_INDEX = iota
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VFIO_PCI_MSI_IRQ_INDEX
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VFIO_PCI_MSIX_IRQ_INDEX
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VFIO_PCI_ERR_IRQ_INDEX
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VFIO_PCI_REQ_IRQ_INDEX
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VFIO_PCI_NUM_IRQS
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)
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// VFIOIommuType1DmaMap flags.
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const (
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// Readable from device.
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VFIO_DMA_MAP_FLAG_READ = 1 << iota
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// Writable from device.
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VFIO_DMA_MAP_FLAG_WRITE
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// Update the device's virtual address.
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VFIO_DMA_MAP_FLAG_VADDR
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)
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const (
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VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP = 1
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)
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// IOCTLs for VFIO file descriptor from include/uapi/linux/vfio.h.
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var (
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VFIO_CHECK_EXTENSION = IO(VFIO_TYPE, VFIO_BASE+1)
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VFIO_SET_IOMMU = IO(VFIO_TYPE, VFIO_BASE+2)
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VFIO_GROUP_SET_CONTAINER = IO(VFIO_TYPE, VFIO_BASE+4)
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VFIO_GROUP_UNSET_CONTAINER = IO(VFIO_TYPE, VFIO_BASE+5)
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VFIO_GROUP_GET_DEVICE_FD = IO(VFIO_TYPE, VFIO_BASE+6)
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VFIO_DEVICE_GET_INFO = IO(VFIO_TYPE, VFIO_BASE+7)
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VFIO_DEVICE_GET_REGION_INFO = IO(VFIO_TYPE, VFIO_BASE+8)
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VFIO_DEVICE_GET_IRQ_INFO = IO(VFIO_TYPE, VFIO_BASE+9)
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VFIO_DEVICE_SET_IRQS = IO(VFIO_TYPE, VFIO_BASE+10)
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VFIO_DEVICE_RESET = IO(VFIO_TYPE, VFIO_BASE+11)
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VFIO_IOMMU_MAP_DMA = IO(VFIO_TYPE, VFIO_BASE+13)
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VFIO_IOMMU_UNMAP_DMA = IO(VFIO_TYPE, VFIO_BASE+14)
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)
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// VFIODeviceInfo is analogous to vfio_device_info
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// from include/uapi/linux/vfio.h.
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//
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// +marshal
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type VFIODeviceInfo struct {
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Argsz uint32
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Flags uint32
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// The total amount of regions.
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NumRegions uint32
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// The maximum number of IRQ.
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NumIrqs uint32
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// Offset within info struct of first cap.
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CapOffset uint32
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pad uint32
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}
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// VFIORegionInfo is analogous to vfio_region_info
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// from include/uapi/linux/vfio.h.
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//
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// +marshal
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type VFIORegionInfo struct {
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Argsz uint32
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Flags uint32
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Index uint32
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// Offset within info struct of first cap.
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capOffset uint32
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// Region size in bytes.
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Size uint64
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// Region offset from start of device fd.
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Offset uint64
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}
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// VFIOIrqInfo is analogous to vfio_irq_info
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// from include/uapi/linux/vfio.h.
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//
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// +marshal
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type VFIOIrqInfo struct {
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Argsz uint32
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Flags uint32
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Index uint32
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Count uint32
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}
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// VFIOIrqSet is analogous to vfio_irq_set
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// from include/uapi/linux/vfio.h.
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// The last field `data` from vfio_irq_set is omitted which is an
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// flexible array member. It will be handled separately.
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//
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// +marshal
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type VFIOIrqSet struct {
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Argsz uint32
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Flags uint32
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Index uint32
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Start uint32
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Count uint32
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}
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// VFIOIommuType1DmaMap is analogous to vfio_iommu_type1_dma_map
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// from include/uapi/linux/vfio.h.
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//
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// +marshal
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type VFIOIommuType1DmaMap struct {
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Argsz uint32
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Flags uint32
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// Process virtual address.
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Vaddr uint64
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// IO virtual address.
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IOVa uint64
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// Size of mapping in bytes.
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Size uint64
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}
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// VFIOIommuType1DmaUnmap is analogous to vfio_iommu_type1_dma_unmap
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// from include/uapi/linux/vfio.h.
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//
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// +marshal
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type VFIOIommuType1DmaUnmap struct {
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Argsz uint32
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Flags uint32
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// IO virtual address.
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IOVa uint64
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// Size of mapping in bytes.
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Size uint64
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// The `data` field from vfio_iommu_type1_dma_unmap is omitted. The
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// field is a flexible array member, and is needed only if the flag
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// VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP is enabled.
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}
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