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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238
pkg/abi/linux/iouring.go
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238
pkg/abi/linux/iouring.go
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// Copyright 2022 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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// Constants for io_uring_setup(2). See include/uapi/linux/io_uring.h.
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const (
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IORING_SETUP_IOPOLL = (1 << 0)
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IORING_SETUP_SQPOLL = (1 << 1)
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IORING_SETUP_SQ_AFF = (1 << 2)
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IORING_SETUP_CQSIZE = (1 << 3)
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IORING_SETUP_CLAMP = (1 << 4)
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IORING_SETUP_ATTACH_WQ = (1 << 5)
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IORING_SETUP_R_DISABLED = (1 << 6)
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IORING_SETUP_SUBMIT_ALL = (1 << 7)
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)
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// Constants for io_uring_enter(2). See include/uapi/linux/io_uring.h.
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const (
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IORING_ENTER_GETEVENTS = (1 << 0)
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)
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// Constants for IoUringParams.Features. See include/uapi/linux/io_uring.h.
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const (
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IORING_FEAT_SINGLE_MMAP = (1 << 0)
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)
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// Constants for IO_URING. See include/uapi/linux/io_uring.h.
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const (
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IORING_SETUP_COOP_TASKRUN = (1 << 8)
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IORING_SETUP_TASKRUN_FLAG = (1 << 9)
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IORING_SETUP_SQE128 = (1 << 10)
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IORING_SETUP_CQE32 = (1 << 11)
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)
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// Constants for IO_URING. See io_uring/io_uring.c.
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const (
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IORING_MAX_ENTRIES = (1 << 15) // 32768
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IORING_MAX_CQ_ENTRIES = (2 * IORING_MAX_ENTRIES)
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)
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// Constants for the offsets for the application to mmap the data it needs.
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// See include/uapi/linux/io_uring.h.
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const (
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IORING_OFF_SQ_RING = 0
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IORING_OFF_CQ_RING = 0x8000000
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IORING_OFF_SQES = 0x10000000
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)
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// Constants for the IO_URING opcodes. See include/uapi/linux/io_uring.h.
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const (
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IORING_OP_NOP = 0
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IORING_OP_READV = 1
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)
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// IORingIndex represents SQE array indexes.
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//
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// +marshal
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type IORingIndex uint32
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// IOSqRingOffsets implements io_sqring_offsets struct.
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// IOSqRingOffsets represents offsets into IORings.
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// See struct io_sqring_offsets in include/uapi/linux/io_uring.h.
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//
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// +marshal
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type IOSqRingOffsets struct {
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Head uint32 // Offset to io_rings.sq.head
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Tail uint32 // Offset to io_rings.sq.tail
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RingMask uint32 // Offset to io_rings.sq_ring_mask
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RingEntries uint32 // Offset to io_rings.sq_ring_entries
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Flags uint32 // Offset to io_rings.sq_flags
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Dropped uint32 // Offset to io_rings.sq_dropped
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Array uint32 // Offset to an array of SQE indices
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Resv1 uint32 // Currently reserved and expected to be zero
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Resv2 uint64 // Currently reserved and expected to be zero
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}
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// IOCqRingOffsets implements io_cqring_offsets struct.
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// IOCqRingOffsets represents offsets into IORings.
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// See struct io_cqring_offsets in include/uapi/linux/io_uring.h.
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//
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// +marshal
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type IOCqRingOffsets struct {
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Head uint32 // Offset to io_rings.cq.head
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Tail uint32 // Offset to io_rings.cq.tail
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RingMask uint32 // Offset to io_rings.cq_ring_mask
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RingEntries uint32 // Offset to io_rings.cq_ring_entries
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Overflow uint32 // Offset to io_rings.cq_overflow
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Cqes uint32 // Offset to io_rings.cqes
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Flags uint32 // Offset to io_rings.cq_flags
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Resv1 uint32 // Currently reserved and expected to be zero
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Resv2 uint64 // Currently reserved and expected to be zero
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}
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// IOUringParams implements io_uring_params struct.
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// See struct io_uring_params in include/uapi/linux/io_uring.h.
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//
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// +marshal
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type IOUringParams struct {
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SqEntries uint32
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CqEntries uint32
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Flags uint32
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SqThreadCPU uint32
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SqThreadIdle uint32
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Features uint32
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WqFd uint32
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Resv [3]uint32
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SqOff IOSqRingOffsets
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CqOff IOCqRingOffsets
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}
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// IOUringCqe implements IO completion data structure (Completion Queue Entry)
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// io_uring_cqe struct. As we don't currently support IORING_SETUP_CQE32 flag
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// its size is 16 bytes.
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// See struct io_uring_cqe in include/uapi/linux/io_uring.h.
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//
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// +marshal
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// +stateify savable
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type IOUringCqe struct {
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UserData uint64
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Res int32
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Flags uint32
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}
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// IOUring implements io_uring struct.
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// See struct io_uring in io_uring/io_uring.c.
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//
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// +marshal
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// +stateify savable
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type IOUring struct {
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// Both head and tail should be cacheline aligned. And we assume that
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// cacheline size is 64 bytes.
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Head uint32
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_ [60]byte
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Tail uint32
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_ [60]byte
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}
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// IORings implements io_rings struct.
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// This struct describes layout of the mapped region backed by the ringBuffersFile.
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// See struct io_rings in io_uring/io_uring.c.
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//
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// +marshal
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// +stateify savable
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type IORings struct {
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Sq IOUring
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Cq IOUring
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SqRingMask uint32
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CqRingMask uint32
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SqRingEntries uint32
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CqRingEntries uint32
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sqDropped uint32
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sqFlags int32
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cqFlags uint32
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CqOverflow uint32
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_ [32]byte // Padding so cqes is cacheline aligned
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// Linux has an additional field struct io_uring_cqe cqes[], which represents
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// a dynamic array. We don't include it here in order to enable marshalling.
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}
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// IOUringSqe implements io_uring_sqe struct.
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// This struct represents IO submission data structure (Submission Queue Entry). As we don't yet
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// support IORING_SETUP_SQE128 flag, its size is 64 bytes with no extra padding at the end.
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// See include/uapi/linux/io_uring.h.
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//
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// +marshal
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// +stateify savable
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type IOUringSqe struct {
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Opcode uint8
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Flags uint8
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IoPrio uint16
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Fd int32
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OffOrAddrOrCmdOp uint64
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AddrOrSpliceOff uint64
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Len uint32
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specialFlags uint32
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UserData uint64
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BufIndexOrGroup uint16
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personality uint16
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spliceFDOrFileIndex int32
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addr3 uint64
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_ uint64
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}
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const (
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_IOSqRingOffset = 0 // +checkoffset . IORings.Sq
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_IOSqRingOffsetHead = 0 // +checkoffset . IOUring.Head
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_IOSqRingOffsetTail = 64 // +checkoffset . IOUring.Tail
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_IOSqRingOffsetMask = 256 // +checkoffset . IORings.SqRingMask
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_IOSqRingOffsetEntries = 264 // +checkoffset . IORings.SqRingEntries
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_IOSqRingOffsetFlags = 276 // +checkoffset . IORings.sqFlags
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_IOSqRingOffsetDropped = 272 // +checkoffset . IORings.sqDropped
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)
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// PreComputedIOSqRingOffsets returns precomputed values for IOSqRingOffsets.
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func PreComputedIOSqRingOffsets() IOSqRingOffsets {
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return IOSqRingOffsets{
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Head: _IOSqRingOffset + _IOSqRingOffsetHead,
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Tail: _IOSqRingOffset + _IOSqRingOffsetTail,
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RingMask: _IOSqRingOffsetMask,
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RingEntries: _IOSqRingOffsetEntries,
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Flags: _IOSqRingOffsetFlags,
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Dropped: _IOSqRingOffsetDropped,
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}
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}
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const (
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_IOCqRingOffset = 128 // +checkoffset . IORings.Cq
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_IOCqRingOffsetHead = 0 // +checkoffset . IOUring.Head
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_IOCqRingOffsetTail = 64 // +checkoffset . IOUring.Tail
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_IOCqRingOffsetMask = 260 // +checkoffset . IORings.CqRingMask
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_IOCqRingOffsetEntries = 268 // +checkoffset . IORings.CqRingEntries
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_IOCqRingOffsetFlags = 280 // +checkoffset . IORings.cqFlags
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_IOCqRingOffsetOverflow = 284 // +checkoffset . IORings.CqOverflow
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)
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// PreComputedIOCqRingOffsets returns precomputed values for IOCqRingOffsets.
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func PreComputedIOCqRingOffsets() IOCqRingOffsets {
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return IOCqRingOffsets{
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Head: _IOCqRingOffset + _IOCqRingOffsetHead,
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Tail: _IOCqRingOffset + _IOCqRingOffsetTail,
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RingMask: _IOCqRingOffsetMask,
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RingEntries: _IOCqRingOffsetEntries,
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Overflow: _IOCqRingOffsetOverflow,
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Flags: _IOCqRingOffsetFlags,
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}
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}
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