117243aa02
Обновление снапшота с v0.0.0-20250811.0 на пин, которого требует sing-box после мержа 235 коммитов (upstream d620bbbf2 "Update gvisor to 20260727.0"). Прежний снапшот был взят 2026-08-04 ровно с той версии, на которой тогда стоял апстрим; разрыв возник 2026-08-05 вместе с его бампом. За год апстрим-gvisor изменил ~14 000 строк в 292 файлах. Значимое для нас — сетевой стек: tcp/connect.go (PMTU-discovery + исправление начального RTT/RTO: раньше задержка ACK внутри стека завышала стартовый таймаут на несколько RTT), tcp/snd.go, tcp/rcv.go, stack/conntrack.go, stack/packet_buffer.go. Всего 30 файлов в TCP и 37 в stack. Баг SPEC 048 апстрим НЕ исправил — проверено по коду новой версии: handleConnecting по-прежнему проверяет состояние endpoint'а, но не ep.h, а performHandshake так же зануляет h и отпускает мьютекс до Close(). Поэтому guard перенесён (12 строк) вместе со своим тестом (45 строк). Red/green проверен на новой базе: без guard'а тест падает с той же nil-паникой, что в полевом крашдампе; с ним зелёный.
143 lines
3.6 KiB
Go
143 lines
3.6 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 (
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"math"
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"structs"
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"github.com/sagernet/gvisor/pkg/hostarch"
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)
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// Filesystem types used in statfs(2).
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//
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// See linux/magic.h.
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const (
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ANON_INODE_FS_MAGIC = 0x09041934
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CGROUP_SUPER_MAGIC = 0x27e0eb
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CGROUP2_SUPER_MAGIC = 0x63677270
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DEVPTS_SUPER_MAGIC = 0x00001cd1
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EXT_SUPER_MAGIC = 0xef53
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FUSE_SUPER_MAGIC = 0x65735546
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MQUEUE_MAGIC = 0x19800202
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NSFS_MAGIC = 0x6e736673
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OVERLAYFS_SUPER_MAGIC = 0x794c7630
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PIPEFS_MAGIC = 0x50495045
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PROC_SUPER_MAGIC = 0x9fa0
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RAMFS_MAGIC = 0x09041934
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SOCKFS_MAGIC = 0x534F434B
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SYSFS_MAGIC = 0x62656572
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TMPFS_MAGIC = 0x01021994
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V9FS_MAGIC = 0x01021997
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)
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// Filesystem path limits, from uapi/linux/limits.h.
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const (
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NAME_MAX = 255
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PATH_MAX = 4096
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)
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// The bit mask f_flags in struct statfs, from include/linux/statfs.h
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const (
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ST_RDONLY = 0x0001
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ST_NOSUID = 0x0002
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ST_NODEV = 0x0004
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ST_NOEXEC = 0x0008
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ST_SYNCHRONOUS = 0x0010
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ST_VALID = 0x0020
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ST_MANDLOCK = 0x0040
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ST_NOATIME = 0x0400
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ST_NODIRATIME = 0x0800
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ST_RELATIME = 0x1000
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ST_NOSYMFOLLOW = 0x2000
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)
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// Statfs is struct statfs, from uapi/asm-generic/statfs.h.
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//
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// +marshal
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type Statfs struct {
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_ structs.HostLayout
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// Type is one of the filesystem magic values, defined above.
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Type uint64
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// BlockSize is the optimal transfer block size in bytes.
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BlockSize int64
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// Blocks is the maximum number of data blocks the filesystem may store, in
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// units of BlockSize.
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Blocks uint64
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// BlocksFree is the number of free data blocks, in units of BlockSize.
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BlocksFree uint64
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// BlocksAvailable is the number of data blocks free for use by
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// unprivileged users, in units of BlockSize.
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BlocksAvailable uint64
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// Files is the number of used file nodes on the filesystem.
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Files uint64
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// FileFress is the number of free file nodes on the filesystem.
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FilesFree uint64
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// FSID is the filesystem ID.
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FSID [2]int32
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// NameLength is the maximum file name length.
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NameLength uint64
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// FragmentSize is equivalent to BlockSize.
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FragmentSize int64
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// Flags is the set of filesystem mount flags.
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Flags uint64
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// Spare is unused.
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Spare [4]uint64
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}
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// Whence argument to lseek(2), from include/uapi/linux/fs.h.
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const (
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SEEK_SET = 0
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SEEK_CUR = 1
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SEEK_END = 2
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SEEK_DATA = 3
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SEEK_HOLE = 4
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)
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// Sync_file_range flags, from include/uapi/linux/fs.h
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const (
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SYNC_FILE_RANGE_WAIT_BEFORE = 1
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SYNC_FILE_RANGE_WRITE = 2
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SYNC_FILE_RANGE_WAIT_AFTER = 4
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)
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// Flag argument to renameat2(2), from include/uapi/linux/fs.h.
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const (
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RENAME_NOREPLACE = (1 << 0) // Don't overwrite target.
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RENAME_EXCHANGE = (1 << 1) // Exchange src and dst.
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RENAME_WHITEOUT = (1 << 2) // Whiteout src.
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)
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// Overlayfs constants from include/linux/fs.h.
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const (
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WHITEOUT_MODE = 0
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WHITEOUT_DEV = 0
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)
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// MAX_RW_COUNT is the maximum size in bytes of a single read or write.
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// Reads and writes that exceed this size may be truncated.
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// (Linux: include/linux/fs.h:MAX_RW_COUNT)
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var MAX_RW_COUNT = int(hostarch.PageRoundDown(uint32(math.MaxInt32)))
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