1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package vfs
import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/errors/linuxerr"
"gvisor.dev/gvisor/pkg/sentry/arch"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/memmap"
"gvisor.dev/gvisor/pkg/usermem"
)
// opathFD implements FileDescriptionImpl for a file description opened with O_PATH.
//
// +stateify savable
type opathFD struct {
vfsfd FileDescription
FileDescriptionDefaultImpl
BadLockFD
}
// Release implements FileDescriptionImpl.Release.
func (fd *opathFD) Release(context.Context) {
// noop
}
// Allocate implements FileDescriptionImpl.Allocate.
func (fd *opathFD) Allocate(ctx context.Context, mode, offset, length uint64) error {
return linuxerr.EBADF
}
// PRead implements FileDescriptionImpl.PRead.
func (fd *opathFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts ReadOptions) (int64, error) {
return 0, linuxerr.EBADF
}
// Read implements FileDescriptionImpl.Read.
func (fd *opathFD) Read(ctx context.Context, dst usermem.IOSequence, opts ReadOptions) (int64, error) {
return 0, linuxerr.EBADF
}
// PWrite implements FileDescriptionImpl.PWrite.
func (fd *opathFD) PWrite(ctx context.Context, src usermem.IOSequence, offset int64, opts WriteOptions) (int64, error) {
return 0, linuxerr.EBADF
}
// Write implements FileDescriptionImpl.Write.
func (fd *opathFD) Write(ctx context.Context, src usermem.IOSequence, opts WriteOptions) (int64, error) {
return 0, linuxerr.EBADF
}
// Ioctl implements FileDescriptionImpl.Ioctl.
func (fd *opathFD) Ioctl(ctx context.Context, uio usermem.IO, args arch.SyscallArguments) (uintptr, error) {
return 0, linuxerr.EBADF
}
// IterDirents implements FileDescriptionImpl.IterDirents.
func (fd *opathFD) IterDirents(ctx context.Context, cb IterDirentsCallback) error {
return linuxerr.EBADF
}
// Seek implements FileDescriptionImpl.Seek.
func (fd *opathFD) Seek(ctx context.Context, offset int64, whence int32) (int64, error) {
return 0, linuxerr.EBADF
}
// ConfigureMMap implements FileDescriptionImpl.ConfigureMMap.
func (fd *opathFD) ConfigureMMap(ctx context.Context, opts *memmap.MMapOpts) error {
return linuxerr.EBADF
}
// ListXattr implements FileDescriptionImpl.ListXattr.
func (fd *opathFD) ListXattr(ctx context.Context, size uint64) ([]string, error) {
return nil, linuxerr.EBADF
}
// GetXattr implements FileDescriptionImpl.GetXattr.
func (fd *opathFD) GetXattr(ctx context.Context, opts GetXattrOptions) (string, error) {
return "", linuxerr.EBADF
}
// SetXattr implements FileDescriptionImpl.SetXattr.
func (fd *opathFD) SetXattr(ctx context.Context, opts SetXattrOptions) error {
return linuxerr.EBADF
}
// RemoveXattr implements FileDescriptionImpl.RemoveXattr.
func (fd *opathFD) RemoveXattr(ctx context.Context, name string) error {
return linuxerr.EBADF
}
// Sync implements FileDescriptionImpl.Sync.
func (fd *opathFD) Sync(ctx context.Context) error {
return linuxerr.EBADF
}
// SetStat implements FileDescriptionImpl.SetStat.
func (fd *opathFD) SetStat(ctx context.Context, opts SetStatOptions) error {
return linuxerr.EBADF
}
// Stat implements FileDescriptionImpl.Stat.
func (fd *opathFD) Stat(ctx context.Context, opts StatOptions) (linux.Statx, error) {
vfsObj := fd.vfsfd.vd.mount.vfs
rp := vfsObj.getResolvingPath(auth.CredentialsFromContext(ctx), &PathOperation{
Root: fd.vfsfd.vd,
Start: fd.vfsfd.vd,
})
stat, err := fd.vfsfd.vd.mount.fs.impl.StatAt(ctx, rp, opts)
rp.Release(ctx)
return stat, err
}
// StatFS returns metadata for the filesystem containing the file represented
// by fd.
func (fd *opathFD) StatFS(ctx context.Context) (linux.Statfs, error) {
vfsObj := fd.vfsfd.vd.mount.vfs
rp := vfsObj.getResolvingPath(auth.CredentialsFromContext(ctx), &PathOperation{
Root: fd.vfsfd.vd,
Start: fd.vfsfd.vd,
})
statfs, err := fd.vfsfd.vd.mount.fs.impl.StatFSAt(ctx, rp)
rp.Release(ctx)
return statfs, err
}
|
