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-rw-r--r--pkg/sentry/fsimpl/devtmpfs/devtmpfs.go4
-rw-r--r--pkg/sentry/fsimpl/gofer/filesystem.go5
-rw-r--r--pkg/sentry/fsimpl/gofer/gofer.go3
-rw-r--r--pkg/sentry/fsimpl/kernfs/filesystem.go10
-rw-r--r--pkg/sentry/fsimpl/proc/BUILD1
-rw-r--r--pkg/sentry/fsimpl/proc/filesystem.go18
-rw-r--r--pkg/sentry/fsimpl/proc/tasks_test.go17
-rw-r--r--pkg/sentry/fsimpl/sys/BUILD1
-rw-r--r--pkg/sentry/fsimpl/sys/sys.go3
-rw-r--r--pkg/sentry/fsimpl/sys/sys_test.go7
-rw-r--r--pkg/sentry/fsimpl/testutil/BUILD2
-rw-r--r--pkg/sentry/fsimpl/testutil/kernel.go24
-rw-r--r--pkg/sentry/fsimpl/testutil/testutil.go12
-rw-r--r--pkg/sentry/fsimpl/tmpfs/filesystem.go12
-rw-r--r--pkg/sentry/fsimpl/tmpfs/tmpfs.go3
15 files changed, 79 insertions, 43 deletions
diff --git a/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go b/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go
index e03a0c665..abd4f24e7 100644
--- a/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go
+++ b/pkg/sentry/fsimpl/devtmpfs/devtmpfs.go
@@ -28,6 +28,9 @@ import (
"gvisor.dev/gvisor/pkg/sync"
)
+// Name is the default filesystem name.
+const Name = "devtmpfs"
+
// FilesystemType implements vfs.FilesystemType.
type FilesystemType struct {
initOnce sync.Once
@@ -107,6 +110,7 @@ func (a *Accessor) wrapContext(ctx context.Context) *accessorContext {
func (ac *accessorContext) Value(key interface{}) interface{} {
switch key {
case vfs.CtxMountNamespace:
+ ac.a.mntns.IncRef()
return ac.a.mntns
case vfs.CtxRoot:
ac.a.root.IncRef()
diff --git a/pkg/sentry/fsimpl/gofer/filesystem.go b/pkg/sentry/fsimpl/gofer/filesystem.go
index 138adb9f7..5cfb0dc4c 100644
--- a/pkg/sentry/fsimpl/gofer/filesystem.go
+++ b/pkg/sentry/fsimpl/gofer/filesystem.go
@@ -400,6 +400,7 @@ func (fs *filesystem) unlinkAt(ctx context.Context, rp *vfs.ResolvingPath, dir b
}
vfsObj := rp.VirtualFilesystem()
mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
parent.dirMu.Lock()
defer parent.dirMu.Unlock()
childVFSD := parent.vfsd.Child(name)
@@ -934,7 +935,9 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
if oldParent == newParent && oldName == newName {
return nil
}
- if err := vfsObj.PrepareRenameDentry(vfs.MountNamespaceFromContext(ctx), &renamed.vfsd, replacedVFSD); err != nil {
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := vfsObj.PrepareRenameDentry(mntns, &renamed.vfsd, replacedVFSD); err != nil {
return err
}
if err := renamed.file.rename(ctx, newParent.file, newName); err != nil {
diff --git a/pkg/sentry/fsimpl/gofer/gofer.go b/pkg/sentry/fsimpl/gofer/gofer.go
index d0552bd99..d00850e25 100644
--- a/pkg/sentry/fsimpl/gofer/gofer.go
+++ b/pkg/sentry/fsimpl/gofer/gofer.go
@@ -52,6 +52,9 @@ import (
"gvisor.dev/gvisor/pkg/usermem"
)
+// Name is the default filesystem name.
+const Name = "9p"
+
// FilesystemType implements vfs.FilesystemType.
type FilesystemType struct{}
diff --git a/pkg/sentry/fsimpl/kernfs/filesystem.go b/pkg/sentry/fsimpl/kernfs/filesystem.go
index ee98eb66a..292f58afd 100644
--- a/pkg/sentry/fsimpl/kernfs/filesystem.go
+++ b/pkg/sentry/fsimpl/kernfs/filesystem.go
@@ -544,6 +544,7 @@ func (fs *Filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
}
mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
virtfs := rp.VirtualFilesystem()
srcDirDentry := srcDirVFSD.Impl().(*Dentry)
@@ -595,7 +596,10 @@ func (fs *Filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
parentDentry := vfsd.Parent().Impl().(*Dentry)
parentDentry.dirMu.Lock()
defer parentDentry.dirMu.Unlock()
- if err := virtfs.PrepareDeleteDentry(vfs.MountNamespaceFromContext(ctx), vfsd); err != nil {
+
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := virtfs.PrepareDeleteDentry(mntns, vfsd); err != nil {
return err
}
if err := parentDentry.inode.RmDir(ctx, rp.Component(), vfsd); err != nil {
@@ -697,7 +701,9 @@ func (fs *Filesystem) UnlinkAt(ctx context.Context, rp *vfs.ResolvingPath) error
parentDentry := vfsd.Parent().Impl().(*Dentry)
parentDentry.dirMu.Lock()
defer parentDentry.dirMu.Unlock()
- if err := virtfs.PrepareDeleteDentry(vfs.MountNamespaceFromContext(ctx), vfsd); err != nil {
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := virtfs.PrepareDeleteDentry(mntns, vfsd); err != nil {
return err
}
if err := parentDentry.inode.Unlink(ctx, rp.Component(), vfsd); err != nil {
diff --git a/pkg/sentry/fsimpl/proc/BUILD b/pkg/sentry/fsimpl/proc/BUILD
index 12aac2e6a..a83245866 100644
--- a/pkg/sentry/fsimpl/proc/BUILD
+++ b/pkg/sentry/fsimpl/proc/BUILD
@@ -14,6 +14,7 @@ go_library(
"tasks_net.go",
"tasks_sys.go",
],
+ visibility = ["//pkg/sentry:internal"],
deps = [
"//pkg/abi/linux",
"//pkg/context",
diff --git a/pkg/sentry/fsimpl/proc/filesystem.go b/pkg/sentry/fsimpl/proc/filesystem.go
index 11477b6a9..5c19d5522 100644
--- a/pkg/sentry/fsimpl/proc/filesystem.go
+++ b/pkg/sentry/fsimpl/proc/filesystem.go
@@ -26,15 +26,18 @@ import (
"gvisor.dev/gvisor/pkg/sentry/vfs"
)
-// procFSType is the factory class for procfs.
+// Name is the default filesystem name.
+const Name = "proc"
+
+// FilesystemType is the factory class for procfs.
//
// +stateify savable
-type procFSType struct{}
+type FilesystemType struct{}
-var _ vfs.FilesystemType = (*procFSType)(nil)
+var _ vfs.FilesystemType = (*FilesystemType)(nil)
// GetFilesystem implements vfs.FilesystemType.
-func (ft *procFSType) GetFilesystem(ctx context.Context, vfsObj *vfs.VirtualFilesystem, creds *auth.Credentials, source string, opts vfs.GetFilesystemOptions) (*vfs.Filesystem, *vfs.Dentry, error) {
+func (ft *FilesystemType) GetFilesystem(ctx context.Context, vfsObj *vfs.VirtualFilesystem, creds *auth.Credentials, source string, opts vfs.GetFilesystemOptions) (*vfs.Filesystem, *vfs.Dentry, error) {
k := kernel.KernelFromContext(ctx)
if k == nil {
return nil, nil, fmt.Errorf("procfs requires a kernel")
@@ -47,12 +50,13 @@ func (ft *procFSType) GetFilesystem(ctx context.Context, vfsObj *vfs.VirtualFile
procfs := &kernfs.Filesystem{}
procfs.VFSFilesystem().Init(vfsObj, procfs)
- var data *InternalData
+ var cgroups map[string]string
if opts.InternalData != nil {
- data = opts.InternalData.(*InternalData)
+ data := opts.InternalData.(*InternalData)
+ cgroups = data.Cgroups
}
- _, dentry := newTasksInode(procfs, k, pidns, data.Cgroups)
+ _, dentry := newTasksInode(procfs, k, pidns, cgroups)
return procfs.VFSFilesystem(), dentry.VFSDentry(), nil
}
diff --git a/pkg/sentry/fsimpl/proc/tasks_test.go b/pkg/sentry/fsimpl/proc/tasks_test.go
index 6fc3524db..96c72cbc9 100644
--- a/pkg/sentry/fsimpl/proc/tasks_test.go
+++ b/pkg/sentry/fsimpl/proc/tasks_test.go
@@ -90,8 +90,7 @@ func setup(t *testing.T) *testutil.System {
ctx := k.SupervisorContext()
creds := auth.CredentialsFromContext(ctx)
- vfsObj := vfs.New()
- vfsObj.MustRegisterFilesystemType("procfs", &procFSType{}, &vfs.RegisterFilesystemTypeOptions{
+ k.VFS.MustRegisterFilesystemType(Name, &FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
AllowUserMount: true,
})
fsOpts := vfs.GetFilesystemOptions{
@@ -102,11 +101,11 @@ func setup(t *testing.T) *testutil.System {
},
},
}
- mntns, err := vfsObj.NewMountNamespace(ctx, creds, "", "procfs", &fsOpts)
+ mntns, err := k.VFS.NewMountNamespace(ctx, creds, "", Name, &fsOpts)
if err != nil {
t.Fatalf("NewMountNamespace(): %v", err)
}
- return testutil.NewSystem(ctx, t, vfsObj, mntns)
+ return testutil.NewSystem(ctx, t, k.VFS, mntns)
}
func TestTasksEmpty(t *testing.T) {
@@ -131,7 +130,7 @@ func TestTasks(t *testing.T) {
var tasks []*kernel.Task
for i := 0; i < 5; i++ {
tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc)
+ task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root)
if err != nil {
t.Fatalf("CreateTask(): %v", err)
}
@@ -213,7 +212,7 @@ func TestTasksOffset(t *testing.T) {
k := kernel.KernelFromContext(s.Ctx)
for i := 0; i < 3; i++ {
tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- if _, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc); err != nil {
+ if _, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root); err != nil {
t.Fatalf("CreateTask(): %v", err)
}
}
@@ -337,7 +336,7 @@ func TestTask(t *testing.T) {
k := kernel.KernelFromContext(s.Ctx)
tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- _, err := testutil.CreateTask(s.Ctx, "name", tc)
+ _, err := testutil.CreateTask(s.Ctx, "name", tc, s.MntNs, s.Root, s.Root)
if err != nil {
t.Fatalf("CreateTask(): %v", err)
}
@@ -352,7 +351,7 @@ func TestProcSelf(t *testing.T) {
k := kernel.KernelFromContext(s.Ctx)
tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, "name", tc)
+ task, err := testutil.CreateTask(s.Ctx, "name", tc, s.MntNs, s.Root, s.Root)
if err != nil {
t.Fatalf("CreateTask(): %v", err)
}
@@ -433,7 +432,7 @@ func TestTree(t *testing.T) {
var tasks []*kernel.Task
for i := 0; i < 5; i++ {
tc := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, k.GlobalInit().Limits())
- task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc)
+ task, err := testutil.CreateTask(s.Ctx, fmt.Sprintf("name-%d", i), tc, s.MntNs, s.Root, s.Root)
if err != nil {
t.Fatalf("CreateTask(): %v", err)
}
diff --git a/pkg/sentry/fsimpl/sys/BUILD b/pkg/sentry/fsimpl/sys/BUILD
index 66c0d8bc8..a741e2bb6 100644
--- a/pkg/sentry/fsimpl/sys/BUILD
+++ b/pkg/sentry/fsimpl/sys/BUILD
@@ -7,6 +7,7 @@ go_library(
srcs = [
"sys.go",
],
+ visibility = ["//pkg/sentry:internal"],
deps = [
"//pkg/abi/linux",
"//pkg/context",
diff --git a/pkg/sentry/fsimpl/sys/sys.go b/pkg/sentry/fsimpl/sys/sys.go
index d693fceae..c36c4fa11 100644
--- a/pkg/sentry/fsimpl/sys/sys.go
+++ b/pkg/sentry/fsimpl/sys/sys.go
@@ -28,6 +28,9 @@ import (
"gvisor.dev/gvisor/pkg/syserror"
)
+// Name is the default filesystem name.
+const Name = "sysfs"
+
// FilesystemType implements vfs.FilesystemType.
type FilesystemType struct{}
diff --git a/pkg/sentry/fsimpl/sys/sys_test.go b/pkg/sentry/fsimpl/sys/sys_test.go
index 8b1cf0bd0..5d1ba5867 100644
--- a/pkg/sentry/fsimpl/sys/sys_test.go
+++ b/pkg/sentry/fsimpl/sys/sys_test.go
@@ -34,16 +34,15 @@ func newTestSystem(t *testing.T) *testutil.System {
}
ctx := k.SupervisorContext()
creds := auth.CredentialsFromContext(ctx)
- v := vfs.New()
- v.MustRegisterFilesystemType("sysfs", sys.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
+ k.VFS.MustRegisterFilesystemType(sys.Name, sys.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
AllowUserMount: true,
})
- mns, err := v.NewMountNamespace(ctx, creds, "", "sysfs", &vfs.GetFilesystemOptions{})
+ mns, err := k.VFS.NewMountNamespace(ctx, creds, "", sys.Name, &vfs.GetFilesystemOptions{})
if err != nil {
t.Fatalf("Failed to create new mount namespace: %v", err)
}
- return testutil.NewSystem(ctx, t, v, mns)
+ return testutil.NewSystem(ctx, t, k.VFS, mns)
}
func TestReadCPUFile(t *testing.T) {
diff --git a/pkg/sentry/fsimpl/testutil/BUILD b/pkg/sentry/fsimpl/testutil/BUILD
index efd5974c4..e4f36f4ae 100644
--- a/pkg/sentry/fsimpl/testutil/BUILD
+++ b/pkg/sentry/fsimpl/testutil/BUILD
@@ -16,7 +16,7 @@ go_library(
"//pkg/cpuid",
"//pkg/fspath",
"//pkg/memutil",
- "//pkg/sentry/fs",
+ "//pkg/sentry/fsimpl/tmpfs",
"//pkg/sentry/kernel",
"//pkg/sentry/kernel/auth",
"//pkg/sentry/kernel/sched",
diff --git a/pkg/sentry/fsimpl/testutil/kernel.go b/pkg/sentry/fsimpl/testutil/kernel.go
index 89f8c4915..a91b3ec4d 100644
--- a/pkg/sentry/fsimpl/testutil/kernel.go
+++ b/pkg/sentry/fsimpl/testutil/kernel.go
@@ -24,7 +24,7 @@ import (
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/cpuid"
"gvisor.dev/gvisor/pkg/memutil"
- "gvisor.dev/gvisor/pkg/sentry/fs"
+ "gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs"
"gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/sentry/kernel/sched"
@@ -33,6 +33,7 @@ import (
"gvisor.dev/gvisor/pkg/sentry/pgalloc"
"gvisor.dev/gvisor/pkg/sentry/platform"
"gvisor.dev/gvisor/pkg/sentry/time"
+ "gvisor.dev/gvisor/pkg/sentry/vfs"
// Platforms are plugable.
_ "gvisor.dev/gvisor/pkg/sentry/platform/kvm"
@@ -99,26 +100,27 @@ func Boot() (*kernel.Kernel, error) {
return nil, fmt.Errorf("initializing kernel: %v", err)
}
- ctx := k.SupervisorContext()
+ kernel.VFS2Enabled = true
+
+ vfsObj := vfs.New()
+ vfsObj.MustRegisterFilesystemType(tmpfs.Name, &tmpfs.FilesystemType{}, &vfs.RegisterFilesystemTypeOptions{
+ AllowUserMount: true,
+ AllowUserList: true,
+ })
+ k.VFS = vfsObj
- // Create mount namespace without root as it's the minimum required to create
- // the global thread group.
- mntns, err := fs.NewMountNamespace(ctx, nil)
- if err != nil {
- return nil, err
- }
ls, err := limits.NewLinuxLimitSet()
if err != nil {
return nil, err
}
- tg := k.NewThreadGroup(mntns, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, ls)
+ tg := k.NewThreadGroup(nil, k.RootPIDNamespace(), kernel.NewSignalHandlers(), linux.SIGCHLD, ls)
k.TestOnly_SetGlobalInit(tg)
return k, nil
}
// CreateTask creates a new bare bones task for tests.
-func CreateTask(ctx context.Context, name string, tc *kernel.ThreadGroup) (*kernel.Task, error) {
+func CreateTask(ctx context.Context, name string, tc *kernel.ThreadGroup, mntns *vfs.MountNamespace, root, cwd vfs.VirtualDentry) (*kernel.Task, error) {
k := kernel.KernelFromContext(ctx)
config := &kernel.TaskConfig{
Kernel: k,
@@ -129,6 +131,8 @@ func CreateTask(ctx context.Context, name string, tc *kernel.ThreadGroup) (*kern
UTSNamespace: kernel.UTSNamespaceFromContext(ctx),
IPCNamespace: kernel.IPCNamespaceFromContext(ctx),
AbstractSocketNamespace: kernel.NewAbstractSocketNamespace(),
+ MountNamespaceVFS2: mntns,
+ FSContext: kernel.NewFSContextVFS2(root, cwd, 0022),
}
return k.TaskSet().NewTask(config)
}
diff --git a/pkg/sentry/fsimpl/testutil/testutil.go b/pkg/sentry/fsimpl/testutil/testutil.go
index 69fd84ddd..b97e3534a 100644
--- a/pkg/sentry/fsimpl/testutil/testutil.go
+++ b/pkg/sentry/fsimpl/testutil/testutil.go
@@ -41,12 +41,12 @@ type System struct {
Creds *auth.Credentials
VFS *vfs.VirtualFilesystem
Root vfs.VirtualDentry
- mns *vfs.MountNamespace
+ MntNs *vfs.MountNamespace
}
// NewSystem constructs a System.
//
-// Precondition: Caller must hold a reference on mns, whose ownership
+// Precondition: Caller must hold a reference on MntNs, whose ownership
// is transferred to the new System.
func NewSystem(ctx context.Context, t *testing.T, v *vfs.VirtualFilesystem, mns *vfs.MountNamespace) *System {
s := &System{
@@ -54,7 +54,7 @@ func NewSystem(ctx context.Context, t *testing.T, v *vfs.VirtualFilesystem, mns
Ctx: ctx,
Creds: auth.CredentialsFromContext(ctx),
VFS: v,
- mns: mns,
+ MntNs: mns,
Root: mns.Root(),
}
return s
@@ -75,7 +75,7 @@ func (s *System) WithSubtest(t *testing.T) *System {
Ctx: s.Ctx,
Creds: s.Creds,
VFS: s.VFS,
- mns: s.mns,
+ MntNs: s.MntNs,
Root: s.Root,
}
}
@@ -90,7 +90,7 @@ func (s *System) WithTemporaryContext(ctx context.Context) *System {
Ctx: ctx,
Creds: s.Creds,
VFS: s.VFS,
- mns: s.mns,
+ MntNs: s.MntNs,
Root: s.Root,
}
}
@@ -98,7 +98,7 @@ func (s *System) WithTemporaryContext(ctx context.Context) *System {
// Destroy release resources associated with a test system.
func (s *System) Destroy() {
s.Root.DecRef()
- s.mns.DecRef() // Reference on mns passed to NewSystem.
+ s.MntNs.DecRef() // Reference on MntNs passed to NewSystem.
}
// ReadToEnd reads the contents of fd until EOF to a string.
diff --git a/pkg/sentry/fsimpl/tmpfs/filesystem.go b/pkg/sentry/fsimpl/tmpfs/filesystem.go
index 8785452b6..7f7b791c4 100644
--- a/pkg/sentry/fsimpl/tmpfs/filesystem.go
+++ b/pkg/sentry/fsimpl/tmpfs/filesystem.go
@@ -486,7 +486,9 @@ func (fs *filesystem) RenameAt(ctx context.Context, rp *vfs.ResolvingPath, oldPa
vfsObj := rp.VirtualFilesystem()
oldParentDir := oldParent.inode.impl.(*directory)
newParentDir := newParent.inode.impl.(*directory)
- if err := vfsObj.PrepareRenameDentry(vfs.MountNamespaceFromContext(ctx), renamedVFSD, replacedVFSD); err != nil {
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := vfsObj.PrepareRenameDentry(mntns, renamedVFSD, replacedVFSD); err != nil {
return err
}
if replaced != nil {
@@ -543,7 +545,9 @@ func (fs *filesystem) RmdirAt(ctx context.Context, rp *vfs.ResolvingPath) error
}
defer mnt.EndWrite()
vfsObj := rp.VirtualFilesystem()
- if err := vfsObj.PrepareDeleteDentry(vfs.MountNamespaceFromContext(ctx), childVFSD); err != nil {
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := vfsObj.PrepareDeleteDentry(mntns, childVFSD); err != nil {
return err
}
parent.inode.impl.(*directory).childList.Remove(child)
@@ -631,7 +635,9 @@ func (fs *filesystem) UnlinkAt(ctx context.Context, rp *vfs.ResolvingPath) error
}
defer mnt.EndWrite()
vfsObj := rp.VirtualFilesystem()
- if err := vfsObj.PrepareDeleteDentry(vfs.MountNamespaceFromContext(ctx), childVFSD); err != nil {
+ mntns := vfs.MountNamespaceFromContext(ctx)
+ defer mntns.DecRef()
+ if err := vfsObj.PrepareDeleteDentry(mntns, childVFSD); err != nil {
return err
}
parent.inode.impl.(*directory).childList.Remove(child)
diff --git a/pkg/sentry/fsimpl/tmpfs/tmpfs.go b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
index 2108d0f4d..c5bb17562 100644
--- a/pkg/sentry/fsimpl/tmpfs/tmpfs.go
+++ b/pkg/sentry/fsimpl/tmpfs/tmpfs.go
@@ -40,6 +40,9 @@ import (
"gvisor.dev/gvisor/pkg/syserror"
)
+// Name is the default filesystem name.
+const Name = "tmpfs"
+
// FilesystemType implements vfs.FilesystemType.
type FilesystemType struct{}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 16:39:58 +0000