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// Copyright 2020 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 tmpfs
import (
"fmt"
"testing"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/kernel/contexttest"
"gvisor.dev/gvisor/pkg/sentry/vfs"
)
func TestStatAfterCreate(t *testing.T) {
ctx := contexttest.Context(t)
mode := linux.FileMode(0644)
// Run with different file types.
// TODO(gvisor.dev/issues/1197): Also test symlinks and sockets.
for _, typ := range []string{"file", "dir", "pipe"} {
t.Run(fmt.Sprintf("type=%q", typ), func(t *testing.T) {
var (
fd *vfs.FileDescription
cleanup func()
err error
)
switch typ {
case "file":
fd, cleanup, err = newFileFD(ctx, mode)
case "dir":
fd, cleanup, err = newDirFD(ctx, mode)
case "pipe":
fd, cleanup, err = newPipeFD(ctx, mode)
default:
panic(fmt.Sprintf("unknown typ %q", typ))
}
if err != nil {
t.Fatal(err)
}
defer cleanup()
got, err := fd.Stat(ctx, vfs.StatOptions{})
if err != nil {
t.Fatalf("Stat failed: %v", err)
}
// Atime, Ctime, Mtime should all be current time (non-zero).
atime, ctime, mtime := got.Atime.ToNsec(), got.Ctime.ToNsec(), got.Mtime.ToNsec()
if atime != ctime || ctime != mtime {
t.Errorf("got atime=%d ctime=%d mtime=%d, wanted equal values", atime, ctime, mtime)
}
if atime == 0 {
t.Errorf("got atime=%d, want non-zero", atime)
}
// Btime should be 0, as it is not set by tmpfs.
if btime := got.Btime.ToNsec(); btime != 0 {
t.Errorf("got btime %d, want 0", got.Btime.ToNsec())
}
// Size should be 0.
if got.Size != 0 {
t.Errorf("got size %d, want 0", got.Size)
}
// Nlink should be 1 for files, 2 for dirs.
wantNlink := uint32(1)
if typ == "dir" {
wantNlink = 2
}
if got.Nlink != wantNlink {
t.Errorf("got nlink %d, want %d", got.Nlink, wantNlink)
}
// UID and GID are set from context creds.
creds := auth.CredentialsFromContext(ctx)
if got.UID != uint32(creds.EffectiveKUID) {
t.Errorf("got uid %d, want %d", got.UID, uint32(creds.EffectiveKUID))
}
if got.GID != uint32(creds.EffectiveKGID) {
t.Errorf("got gid %d, want %d", got.GID, uint32(creds.EffectiveKGID))
}
// Mode.
wantMode := uint16(mode)
switch typ {
case "file":
wantMode |= linux.S_IFREG
case "dir":
wantMode |= linux.S_IFDIR
case "pipe":
wantMode |= linux.S_IFIFO
default:
panic(fmt.Sprintf("unknown typ %q", typ))
}
if got.Mode != wantMode {
t.Errorf("got mode %x, want %x", got.Mode, wantMode)
}
// Ino.
if got.Ino == 0 {
t.Errorf("got ino %d, want not 0", got.Ino)
}
})
}
}
func TestSetStatAtime(t *testing.T) {
ctx := contexttest.Context(t)
fd, cleanup, err := newFileFD(ctx, 0644)
if err != nil {
t.Fatal(err)
}
defer cleanup()
allStatOptions := vfs.StatOptions{Mask: linux.STATX_ALL}
// Get initial stat.
initialStat, err := fd.Stat(ctx, allStatOptions)
if err != nil {
t.Fatalf("Stat failed: %v", err)
}
// Set atime, but without the mask.
if err := fd.SetStat(ctx, vfs.SetStatOptions{Stat: linux.Statx{
Mask: 0,
Atime: linux.NsecToStatxTimestamp(100),
}}); err != nil {
t.Errorf("SetStat atime without mask failed: %v")
}
// Atime should be unchanged.
if gotStat, err := fd.Stat(ctx, allStatOptions); err != nil {
t.Errorf("Stat got error: %v", err)
} else if gotStat.Atime != initialStat.Atime {
t.Errorf("Stat got atime %d, want %d", gotStat.Atime, initialStat.Atime)
}
// Set atime, this time included in the mask.
setStat := linux.Statx{
Mask: linux.STATX_ATIME,
Atime: linux.NsecToStatxTimestamp(100),
}
if err := fd.SetStat(ctx, vfs.SetStatOptions{Stat: setStat}); err != nil {
t.Errorf("SetStat atime with mask failed: %v")
}
if gotStat, err := fd.Stat(ctx, allStatOptions); err != nil {
t.Errorf("Stat got error: %v", err)
} else if gotStat.Atime != setStat.Atime {
t.Errorf("Stat got atime %d, want %d", gotStat.Atime, setStat.Atime)
}
}
func TestSetStat(t *testing.T) {
ctx := contexttest.Context(t)
mode := linux.FileMode(0644)
// Run with different file types.
// TODO(gvisor.dev/issues/1197): Also test symlinks and sockets.
for _, typ := range []string{"file", "dir", "pipe"} {
t.Run(fmt.Sprintf("type=%q", typ), func(t *testing.T) {
var (
fd *vfs.FileDescription
cleanup func()
err error
)
switch typ {
case "file":
fd, cleanup, err = newFileFD(ctx, mode)
case "dir":
fd, cleanup, err = newDirFD(ctx, mode)
case "pipe":
fd, cleanup, err = newPipeFD(ctx, mode)
default:
panic(fmt.Sprintf("unknown typ %q", typ))
}
if err != nil {
t.Fatal(err)
}
defer cleanup()
allStatOptions := vfs.StatOptions{Mask: linux.STATX_ALL}
// Get initial stat.
initialStat, err := fd.Stat(ctx, allStatOptions)
if err != nil {
t.Fatalf("Stat failed: %v", err)
}
// Set atime, but without the mask.
if err := fd.SetStat(ctx, vfs.SetStatOptions{Stat: linux.Statx{
Mask: 0,
Atime: linux.NsecToStatxTimestamp(100),
}}); err != nil {
t.Errorf("SetStat atime without mask failed: %v")
}
// Atime should be unchanged.
if gotStat, err := fd.Stat(ctx, allStatOptions); err != nil {
t.Errorf("Stat got error: %v", err)
} else if gotStat.Atime != initialStat.Atime {
t.Errorf("Stat got atime %d, want %d", gotStat.Atime, initialStat.Atime)
}
// Set atime, this time included in the mask.
setStat := linux.Statx{
Mask: linux.STATX_ATIME,
Atime: linux.NsecToStatxTimestamp(100),
}
if err := fd.SetStat(ctx, vfs.SetStatOptions{Stat: setStat}); err != nil {
t.Errorf("SetStat atime with mask failed: %v")
}
if gotStat, err := fd.Stat(ctx, allStatOptions); err != nil {
t.Errorf("Stat got error: %v", err)
} else if gotStat.Atime != setStat.Atime {
t.Errorf("Stat got atime %d, want %d", gotStat.Atime, setStat.Atime)
}
})
}
}
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