Plumb context through more layers of filesytem.

All functions which allocate objects containing AtomicRefCounts will soon need
a context.

PiperOrigin-RevId: 253147709

59 files changed, 194 insertions, 192 deletions

diff --git a/pkg/sentry/fs/anon/anon.go b/pkg/sentry/fs/anon/anon.go
index 28bd0998f..7323c7222 100644
--- a/pkg/sentry/fs/anon/anon.go
+++ b/pkg/sentry/fs/anon/anon.go
@@ -33,7 +33,7 @@ func NewInode(ctx context.Context) *fs.Inode {
 			User: fs.PermMask{Read: true, Write: true},
 		}, linux.ANON_INODE_FS_MAGIC),
 	}
-	return fs.NewInode(iops, fs.NewPseudoMountSource(), fs.StableAttr{
+	return fs.NewInode(ctx, iops, fs.NewPseudoMountSource(ctx), fs.StableAttr{
 		Type:      fs.Anonymous,
 		DeviceID:  PseudoDevice.DeviceID(),
 		InodeID:   PseudoDevice.NextIno(),
diff --git a/pkg/sentry/fs/ashmem/area.go b/pkg/sentry/fs/ashmem/area.go
index cae3e4dda..e1971f91c 100644
--- a/pkg/sentry/fs/ashmem/area.go
+++ b/pkg/sentry/fs/ashmem/area.go
@@ -116,8 +116,8 @@ func (a *Area) ConfigureMMap(ctx context.Context, file *fs.File, opts *memmap.MM
 
 	if a.tmpfsFile == nil {
 		tmpfsInodeOps := tmpfs.NewInMemoryFile(ctx, usage.Tmpfs, fs.UnstableAttr{})
-		tmpfsInode := fs.NewInode(tmpfsInodeOps, fs.NewPseudoMountSource(), fs.StableAttr{})
-		dirent := fs.NewDirent(tmpfsInode, namePrefix+"/"+a.name)
+		tmpfsInode := fs.NewInode(ctx, tmpfsInodeOps, fs.NewPseudoMountSource(ctx), fs.StableAttr{})
+		dirent := fs.NewDirent(ctx, tmpfsInode, namePrefix+"/"+a.name)
 		tmpfsFile, err := tmpfsInode.GetFile(ctx, dirent, fs.FileFlags{Read: true, Write: true})
 		// Drop the extra reference on the Dirent.
 		dirent.DecRef()
diff --git a/pkg/sentry/fs/copy_up_test.go b/pkg/sentry/fs/copy_up_test.go
index 72110f856..1d80bf15a 100644
--- a/pkg/sentry/fs/copy_up_test.go
+++ b/pkg/sentry/fs/copy_up_test.go
@@ -102,7 +102,7 @@ func makeOverlayTestFiles(t *testing.T) []*overlayTestFile {
 	if err != nil {
 		t.Fatalf("failed to mount tmpfs: %v", err)
 	}
-	lowerRoot := fs.NewDirent(lower, "")
+	lowerRoot := fs.NewDirent(ctx, lower, "")
 
 	// Make a deep set of subdirectories that everyone shares.
 	next := lowerRoot
diff --git a/pkg/sentry/fs/dev/dev.go b/pkg/sentry/fs/dev/dev.go
index 317be246c..fb6c30ff0 100644
--- a/pkg/sentry/fs/dev/dev.go
+++ b/pkg/sentry/fs/dev/dev.go
@@ -40,8 +40,8 @@ const (
 	urandomDevMinor uint32 = 9
 )
 
-func newCharacterDevice(iops fs.InodeOperations, msrc *fs.MountSource) *fs.Inode {
-	return fs.NewInode(iops, msrc, fs.StableAttr{
+func newCharacterDevice(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource) *fs.Inode {
+	return fs.NewInode(ctx, iops, msrc, fs.StableAttr{
 		DeviceID:  devDevice.DeviceID(),
 		InodeID:   devDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -49,8 +49,8 @@ func newCharacterDevice(iops fs.InodeOperations, msrc *fs.MountSource) *fs.Inode
 	})
 }
 
-func newMemDevice(iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) *fs.Inode {
-	return fs.NewInode(iops, msrc, fs.StableAttr{
+func newMemDevice(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) *fs.Inode {
+	return fs.NewInode(ctx, iops, msrc, fs.StableAttr{
 		DeviceID:        devDevice.DeviceID(),
 		InodeID:         devDevice.NextIno(),
 		BlockSize:       usermem.PageSize,
@@ -62,7 +62,7 @@ func newMemDevice(iops fs.InodeOperations, msrc *fs.MountSource, minor uint32) *
 
 func newDirectory(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	iops := ramfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return fs.NewInode(iops, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, iops, msrc, fs.StableAttr{
 		DeviceID:  devDevice.DeviceID(),
 		InodeID:   devDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -72,7 +72,7 @@ func newDirectory(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 
 func newSymlink(ctx context.Context, target string, msrc *fs.MountSource) *fs.Inode {
 	iops := ramfs.NewSymlink(ctx, fs.RootOwner, target)
-	return fs.NewInode(iops, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, iops, msrc, fs.StableAttr{
 		DeviceID:  devDevice.DeviceID(),
 		InodeID:   devDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -88,17 +88,17 @@ func New(ctx context.Context, msrc *fs.MountSource, binderEnabled bool, ashmemEn
 		"stdout": newSymlink(ctx, "/proc/self/fd/1", msrc),
 		"stderr": newSymlink(ctx, "/proc/self/fd/2", msrc),
 
-		"null": newMemDevice(newNullDevice(ctx, fs.RootOwner, 0666), msrc, nullDevMinor),
-		"zero": newMemDevice(newZeroDevice(ctx, fs.RootOwner, 0666), msrc, zeroDevMinor),
-		"full": newMemDevice(newFullDevice(ctx, fs.RootOwner, 0666), msrc, fullDevMinor),
+		"null": newMemDevice(ctx, newNullDevice(ctx, fs.RootOwner, 0666), msrc, nullDevMinor),
+		"zero": newMemDevice(ctx, newZeroDevice(ctx, fs.RootOwner, 0666), msrc, zeroDevMinor),
+		"full": newMemDevice(ctx, newFullDevice(ctx, fs.RootOwner, 0666), msrc, fullDevMinor),
 
 		// This is not as good as /dev/random in linux because go
 		// runtime uses sys_random and /dev/urandom internally.
 		// According to 'man 4 random', this will be sufficient unless
 		// application uses this to generate long-lived GPG/SSL/SSH
 		// keys.
-		"random":  newMemDevice(newRandomDevice(ctx, fs.RootOwner, 0444), msrc, randomDevMinor),
-		"urandom": newMemDevice(newRandomDevice(ctx, fs.RootOwner, 0444), msrc, urandomDevMinor),
+		"random":  newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, randomDevMinor),
+		"urandom": newMemDevice(ctx, newRandomDevice(ctx, fs.RootOwner, 0444), msrc, urandomDevMinor),
 
 		"shm": tmpfs.NewDir(ctx, nil, fs.RootOwner, fs.FilePermsFromMode(0777), msrc),
 
@@ -120,16 +120,16 @@ func New(ctx context.Context, msrc *fs.MountSource, binderEnabled bool, ashmemEn
 
 	if binderEnabled {
 		binder := binder.NewDevice(ctx, fs.RootOwner, fs.FilePermsFromMode(0666))
-		contents["binder"] = newCharacterDevice(binder, msrc)
+		contents["binder"] = newCharacterDevice(ctx, binder, msrc)
 	}
 
 	if ashmemEnabled {
 		ashmem := ashmem.NewDevice(ctx, fs.RootOwner, fs.FilePermsFromMode(0666))
-		contents["ashmem"] = newCharacterDevice(ashmem, msrc)
+		contents["ashmem"] = newCharacterDevice(ctx, ashmem, msrc)
 	}
 
 	iops := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return fs.NewInode(iops, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, iops, msrc, fs.StableAttr{
 		DeviceID:  devDevice.DeviceID(),
 		InodeID:   devDevice.NextIno(),
 		BlockSize: usermem.PageSize,
diff --git a/pkg/sentry/fs/dev/fs.go b/pkg/sentry/fs/dev/fs.go
index 9ea6e91e9..6dbc8c382 100644
--- a/pkg/sentry/fs/dev/fs.go
+++ b/pkg/sentry/fs/dev/fs.go
@@ -95,5 +95,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 	}
 
 	// Construct the devtmpfs root.
-	return New(ctx, fs.NewNonCachingMountSource(f, flags), binderEnabled, ashmemEnabled), nil
+	return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags), binderEnabled, ashmemEnabled), nil
 }
diff --git a/pkg/sentry/fs/dirent.go b/pkg/sentry/fs/dirent.go
index 9694d915d..ca417d2bc 100644
--- a/pkg/sentry/fs/dirent.go
+++ b/pkg/sentry/fs/dirent.go
@@ -206,7 +206,7 @@ type Dirent struct {
 
 // NewDirent returns a new root Dirent, taking the caller's reference on inode. The caller
 // holds the only reference to the Dirent. Parents may call hashChild to parent this Dirent.
-func NewDirent(inode *Inode, name string) *Dirent {
+func NewDirent(ctx context.Context, inode *Inode, name string) *Dirent {
 	d := newDirent(inode, name)
 	allDirents.add(d)
 	d.userVisible = true
@@ -1068,7 +1068,7 @@ func (d *Dirent) mount(ctx context.Context, inode *Inode) (newChild *Dirent, err
 	//
 	// Note that NewDirent returns with one reference taken; the reference
 	// is donated to the caller as the mount reference.
-	replacement := NewDirent(inode, d.name)
+	replacement := NewDirent(ctx, inode, d.name)
 	replacement.mounted = true
 
 	weakRef, ok := d.parent.hashChild(replacement)
diff --git a/pkg/sentry/fs/dirent_refs_test.go b/pkg/sentry/fs/dirent_refs_test.go
index 73ffd15a6..884e3ff06 100644
--- a/pkg/sentry/fs/dirent_refs_test.go
+++ b/pkg/sentry/fs/dirent_refs_test.go
@@ -31,7 +31,7 @@ func TestWalkPositive(t *testing.T) {
 	// refs == -1 -> has been destroyed.
 
 	ctx := contexttest.Context(t)
-	root := NewDirent(newMockDirInode(ctx, nil), "root")
+	root := NewDirent(ctx, newMockDirInode(ctx, nil), "root")
 
 	if got := root.ReadRefs(); got != 1 {
 		t.Fatalf("root has a ref count of %d, want %d", got, 1)
@@ -73,7 +73,7 @@ func TestWalkNegative(t *testing.T) {
 	// refs == -1 -> has been destroyed.
 
 	ctx := contexttest.Context(t)
-	root := NewDirent(NewEmptyDir(ctx, nil), "root")
+	root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root")
 	mn := root.Inode.InodeOperations.(*mockInodeOperationsLookupNegative)
 
 	if got := root.ReadRefs(); got != 1 {
@@ -144,7 +144,7 @@ type mockInodeOperationsLookupNegative struct {
 
 func NewEmptyDir(ctx context.Context, cache *DirentCache) *Inode {
 	m := NewMockMountSource(cache)
-	return NewInode(&mockInodeOperationsLookupNegative{
+	return NewInode(ctx, &mockInodeOperationsLookupNegative{
 		MockInodeOperations: NewMockInodeOperations(ctx),
 	}, m, StableAttr{Type: Directory})
 }
@@ -162,7 +162,7 @@ func TestHashNegativeToPositive(t *testing.T) {
 	// refs == -1 -> has been destroyed.
 
 	ctx := contexttest.Context(t)
-	root := NewDirent(NewEmptyDir(ctx, nil), "root")
+	root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root")
 
 	name := "d"
 	_, err := root.walk(ctx, root, name, false)
@@ -215,7 +215,6 @@ func TestRevalidate(t *testing.T) {
 	// refs == 0 -> one reference.
 	// refs == -1 -> has been destroyed.
 
-	ctx := contexttest.Context(t)
 	for _, test := range []struct {
 		// desc is the test's description.
 		desc string
@@ -233,7 +232,8 @@ func TestRevalidate(t *testing.T) {
 		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
-			root := NewDirent(NewMockInodeRevalidate(ctx, test.makeNegative), "root")
+			ctx := contexttest.Context(t)
+			root := NewDirent(ctx, NewMockInodeRevalidate(ctx, test.makeNegative), "root")
 
 			name := "d"
 			d1, err := root.walk(ctx, root, name, false)
@@ -263,7 +263,7 @@ func NewMockInodeRevalidate(ctx context.Context, makeNegative bool) *Inode {
 	mn := NewMockInodeOperations(ctx)
 	m := NewMockMountSource(nil)
 	m.MountSourceOperations.(*MockMountSourceOps).revalidate = true
-	return NewInode(&MockInodeOperationsRevalidate{MockInodeOperations: mn, makeNegative: makeNegative}, m, StableAttr{Type: Directory})
+	return NewInode(ctx, &MockInodeOperationsRevalidate{MockInodeOperations: mn, makeNegative: makeNegative}, m, StableAttr{Type: Directory})
 }
 
 func (m *MockInodeOperationsRevalidate) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) {
@@ -290,12 +290,12 @@ func TestCreateExtraRefs(t *testing.T) {
 	}{
 		{
 			desc: "Create caching",
-			root: NewDirent(NewEmptyDir(ctx, NewDirentCache(1)), "root"),
+			root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"),
 			refs: 2,
 		},
 		{
 			desc: "Create not caching",
-			root: NewDirent(NewEmptyDir(ctx, nil), "root"),
+			root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"),
 			refs: 1,
 		},
 	} {
@@ -328,11 +328,11 @@ func TestRemoveExtraRefs(t *testing.T) {
 	}{
 		{
 			desc: "Remove caching",
-			root: NewDirent(NewEmptyDir(ctx, NewDirentCache(1)), "root"),
+			root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"),
 		},
 		{
 			desc: "Remove not caching",
-			root: NewDirent(NewEmptyDir(ctx, nil), "root"),
+			root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"),
 		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
@@ -366,7 +366,6 @@ func TestRenameExtraRefs(t *testing.T) {
 	// refs == 0 -> one reference.
 	// refs == -1 -> has been destroyed.
 
-	ctx := contexttest.Context(t)
 	for _, test := range []struct {
 		// desc is the test's description.
 		desc string
@@ -384,10 +383,12 @@ func TestRenameExtraRefs(t *testing.T) {
 		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
+			ctx := contexttest.Context(t)
+
 			dirAttr := StableAttr{Type: Directory}
 
-			oldParent := NewDirent(NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "old_parent")
-			newParent := NewDirent(NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "new_parent")
+			oldParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "old_parent")
+			newParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "new_parent")
 
 			renamed, err := oldParent.Walk(ctx, oldParent, "old_child")
 			if err != nil {
diff --git a/pkg/sentry/fs/fdpipe/pipe_opener_test.go b/pkg/sentry/fs/fdpipe/pipe_opener_test.go
index 7ae61b711..8e4d839e1 100644
--- a/pkg/sentry/fs/fdpipe/pipe_opener_test.go
+++ b/pkg/sentry/fs/fdpipe/pipe_opener_test.go
@@ -359,7 +359,7 @@ func TestCopiedReadAheadBuffer(t *testing.T) {
 	inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{
 		Type: fs.Pipe,
 	})
-	file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, pipeOps)
+	file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, pipeOps)
 
 	// Check that the file we opened points to a pipe with a non-empty read ahead buffer.
 	bufsize := len(pipeOps.readAheadBuffer)
diff --git a/pkg/sentry/fs/fdpipe/pipe_test.go b/pkg/sentry/fs/fdpipe/pipe_test.go
index 21ea14359..ecda8df79 100644
--- a/pkg/sentry/fs/fdpipe/pipe_test.go
+++ b/pkg/sentry/fs/fdpipe/pipe_test.go
@@ -50,11 +50,11 @@ func mockPipeDirent(t *testing.T) *fs.Dirent {
 			User: fs.PermMask{Read: true, Write: true},
 		},
 	}
-	inode := fs.NewInode(node, fs.NewMockMountSource(nil), fs.StableAttr{
+	inode := fs.NewInode(ctx, node, fs.NewMockMountSource(nil), fs.StableAttr{
 		Type:      fs.Pipe,
 		BlockSize: usermem.PageSize,
 	})
-	return fs.NewDirent(inode, "")
+	return fs.NewDirent(ctx, inode, "")
 }
 
 func TestNewPipe(t *testing.T) {
@@ -285,7 +285,7 @@ func TestPipeRequest(t *testing.T) {
 		defer p.Release()
 
 		inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{Type: fs.Pipe})
-		file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p)
+		file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p)
 
 		// Issue request via the appropriate function.
 		switch c := test.context.(type) {
@@ -339,7 +339,7 @@ func TestPipeReadAheadBuffer(t *testing.T) {
 	inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{
 		Type: fs.Pipe,
 	})
-	file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p)
+	file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p)
 
 	// In total we expect to read data + buffered.
 	total := append(buffered, data...)
@@ -385,7 +385,7 @@ func TestPipeReadsAccumulate(t *testing.T) {
 	inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{
 		Type: fs.Pipe,
 	})
-	file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p)
+	file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p)
 
 	// Write some some bytes to the pipe.
 	data := []byte("some message")
@@ -453,7 +453,7 @@ func TestPipeWritesAccumulate(t *testing.T) {
 	inode := fs.NewMockInode(ctx, fs.NewMockMountSource(nil), fs.StableAttr{
 		Type: fs.Pipe,
 	})
-	file := fs.NewFile(ctx, fs.NewDirent(inode, "pipe"), fs.FileFlags{Read: true}, p)
+	file := fs.NewFile(ctx, fs.NewDirent(ctx, inode, "pipe"), fs.FileFlags{Read: true}, p)
 
 	// Construct a segment vec that is larger than the pipe size to trigger an EWOULDBLOCK.
 	wantBytes := 65536 * 2
diff --git a/pkg/sentry/fs/file_overlay_test.go b/pkg/sentry/fs/file_overlay_test.go
index 1df826f6c..2fb824d5c 100644
--- a/pkg/sentry/fs/file_overlay_test.go
+++ b/pkg/sentry/fs/file_overlay_test.go
@@ -29,7 +29,7 @@ func TestReaddir(t *testing.T) {
 	ctx := contexttest.Context(t)
 	ctx = &rootContext{
 		Context: ctx,
-		root:    fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root"),
+		root:    fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root"),
 	}
 	for _, test := range []struct {
 		// Test description.
@@ -103,7 +103,7 @@ func TestReaddir(t *testing.T) {
 		},
 	} {
 		t.Run(test.desc, func(t *testing.T) {
-			openDir, err := test.dir.GetFile(ctx, fs.NewDirent(test.dir, "stub"), fs.FileFlags{Read: true})
+			openDir, err := test.dir.GetFile(ctx, fs.NewDirent(ctx, test.dir, "stub"), fs.FileFlags{Read: true})
 			if err != nil {
 				t.Fatalf("GetFile got error %v, want nil", err)
 			}
@@ -126,7 +126,7 @@ func TestReaddirRevalidation(t *testing.T) {
 	ctx := contexttest.Context(t)
 	ctx = &rootContext{
 		Context: ctx,
-		root:    fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root"),
+		root:    fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root"),
 	}
 
 	// Create an overlay with two directories, each with one file.
@@ -139,7 +139,7 @@ func TestReaddirRevalidation(t *testing.T) {
 	upperDir := upper.InodeOperations.(*dir).InodeOperations.(*ramfs.Dir)
 
 	// Check that overlay returns the files from both upper and lower.
-	openDir, err := overlay.GetFile(ctx, fs.NewDirent(overlay, "stub"), fs.FileFlags{Read: true})
+	openDir, err := overlay.GetFile(ctx, fs.NewDirent(ctx, overlay, "stub"), fs.FileFlags{Read: true})
 	if err != nil {
 		t.Fatalf("GetFile got error %v, want nil", err)
 	}
@@ -156,7 +156,7 @@ func TestReaddirRevalidation(t *testing.T) {
 	if err := upperDir.Remove(ctx, upper, "a"); err != nil {
 		t.Fatalf("error removing child: %v", err)
 	}
-	upperDir.AddChild(ctx, "c", fs.NewInode(fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermissions{}, 0),
+	upperDir.AddChild(ctx, "c", fs.NewInode(ctx, fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermissions{}, 0),
 		upper.MountSource, fs.StableAttr{Type: fs.RegularFile}))
 
 	// Seek to beginning of the directory and do the readdir again.
@@ -186,7 +186,7 @@ func TestReaddirOverlayFrozen(t *testing.T) {
 	overlayInode := fs.NewTestOverlayDir(ctx, upper, lower, false)
 
 	// Set that overlay as the root.
-	root := fs.NewDirent(overlayInode, "root")
+	root := fs.NewDirent(ctx, overlayInode, "root")
 	ctx = &rootContext{
 		Context: ctx,
 		root:    root,
diff --git a/pkg/sentry/fs/filetest/filetest.go b/pkg/sentry/fs/filetest/filetest.go
index 856477480..22270a494 100644
--- a/pkg/sentry/fs/filetest/filetest.go
+++ b/pkg/sentry/fs/filetest/filetest.go
@@ -46,7 +46,7 @@ type TestFileOperations struct {
 // NewTestFile creates and initializes a new test file.
 func NewTestFile(tb testing.TB) *fs.File {
 	ctx := contexttest.Context(tb)
-	dirent := fs.NewDirent(anon.NewInode(ctx), "test")
+	dirent := fs.NewDirent(ctx, anon.NewInode(ctx), "test")
 	return fs.NewFile(ctx, dirent, fs.FileFlags{}, &TestFileOperations{})
 }
 
diff --git a/pkg/sentry/fs/fsutil/inode_cached_test.go b/pkg/sentry/fs/fsutil/inode_cached_test.go
index 82a67b2e5..dc19255ed 100644
--- a/pkg/sentry/fs/fsutil/inode_cached_test.go
+++ b/pkg/sentry/fs/fsutil/inode_cached_test.go
@@ -253,11 +253,11 @@ func (noopMappingSpace) Invalidate(ar usermem.AddrRange, opts memmap.InvalidateO
 }
 
 func anonInode(ctx context.Context) *fs.Inode {
-	return fs.NewInode(&SimpleFileInode{
+	return fs.NewInode(ctx, &SimpleFileInode{
 		InodeSimpleAttributes: NewInodeSimpleAttributes(ctx, fs.FileOwnerFromContext(ctx), fs.FilePermissions{
 			User: fs.PermMask{Read: true, Write: true},
 		}, 0),
-	}, fs.NewPseudoMountSource(), fs.StableAttr{
+	}, fs.NewPseudoMountSource(ctx), fs.StableAttr{
 		Type:      fs.Anonymous,
 		BlockSize: usermem.PageSize,
 	})
@@ -276,7 +276,7 @@ func TestRead(t *testing.T) {
 
 	// Construct a 3-page file.
 	buf := pagesOf('a', 'b', 'c')
-	file := fs.NewFile(ctx, fs.NewDirent(anonInode(ctx), "anon"), fs.FileFlags{}, nil)
+	file := fs.NewFile(ctx, fs.NewDirent(ctx, anonInode(ctx), "anon"), fs.FileFlags{}, nil)
 	uattr := fs.UnstableAttr{
 		Size: int64(len(buf)),
 	}
diff --git a/pkg/sentry/fs/gofer/gofer_test.go b/pkg/sentry/fs/gofer/gofer_test.go
index f671f219d..7fc3c32ae 100644
--- a/pkg/sentry/fs/gofer/gofer_test.go
+++ b/pkg/sentry/fs/gofer/gofer_test.go
@@ -62,8 +62,8 @@ func rootTest(t *testing.T, name string, cp cachePolicy, fn func(context.Context
 		sattr, rootInodeOperations := newInodeOperations(ctx, s, contextFile{
 			file: rootFile,
 		}, root.QID, p9.AttrMaskAll(), root.Attr, false /* socket */)
-		m := fs.NewMountSource(s, &filesystem{}, fs.MountSourceFlags{})
-		rootInode := fs.NewInode(rootInodeOperations, m, sattr)
+		m := fs.NewMountSource(ctx, s, &filesystem{}, fs.MountSourceFlags{})
+		rootInode := fs.NewInode(ctx, rootInodeOperations, m, sattr)
 
 		// Ensure that the cache is fully invalidated, so that any
 		// close actions actually take place before the full harness is
@@ -207,7 +207,7 @@ func TestRevalidation(t *testing.T) {
 		name := fmt.Sprintf("cachepolicy=%s", test.cachePolicy)
 		rootTest(t, name, test.cachePolicy, func(ctx context.Context, h *p9test.Harness, rootFile *p9test.Mock, rootInode *fs.Inode) {
 			// Wrap in a dirent object.
-			rootDir := fs.NewDirent(rootInode, "root")
+			rootDir := fs.NewDirent(ctx, rootInode, "root")
 
 			// Create a mock file a child of the root. We save when
 			// this is generated, so that when the time changed, we
diff --git a/pkg/sentry/fs/gofer/path.go b/pkg/sentry/fs/gofer/path.go
index 24f6cc093..b91386909 100644
--- a/pkg/sentry/fs/gofer/path.go
+++ b/pkg/sentry/fs/gofer/path.go
@@ -73,7 +73,7 @@ func (i *inodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name string
 	sattr, node := newInodeOperations(ctx, i.fileState.s, newFile, qids[0], mask, p9attr, false)
 
 	// Construct a positive Dirent.
-	return fs.NewDirent(fs.NewInode(node, dir.MountSource, sattr), name), nil
+	return fs.NewDirent(ctx, fs.NewInode(ctx, node, dir.MountSource, sattr), name), nil
 }
 
 // Creates a new Inode at name and returns its File based on the session's cache policy.
@@ -141,7 +141,7 @@ func (i *inodeOperations) Create(ctx context.Context, dir *fs.Inode, name string
 	sattr, iops := newInodeOperations(ctx, i.fileState.s, unopened, qid, mask, p9attr, false)
 
 	// Construct the positive Dirent.
-	d := fs.NewDirent(fs.NewInode(iops, dir.MountSource, sattr), name)
+	d := fs.NewDirent(ctx, fs.NewInode(ctx, iops, dir.MountSource, sattr), name)
 	defer d.DecRef()
 
 	// Construct the new file, caching the handles if allowed.
@@ -277,7 +277,7 @@ func (i *inodeOperations) Bind(ctx context.Context, dir *fs.Inode, name string,
 	sattr, iops := newInodeOperations(ctx, i.fileState.s, unopened, qid, mask, attr, true)
 
 	// Construct the positive Dirent.
-	childDir := fs.NewDirent(fs.NewInode(iops, dir.MountSource, sattr), name)
+	childDir := fs.NewDirent(ctx, fs.NewInode(ctx, iops, dir.MountSource, sattr), name)
 	i.session().endpoints.add(key, childDir, ep)
 	return childDir, nil
 }
diff --git a/pkg/sentry/fs/gofer/session.go b/pkg/sentry/fs/gofer/session.go
index 1763c8692..7ad0d8bc5 100644
--- a/pkg/sentry/fs/gofer/session.go
+++ b/pkg/sentry/fs/gofer/session.go
@@ -251,7 +251,7 @@ func Root(ctx context.Context, dev string, filesystem fs.Filesystem, superBlockF
 	}
 
 	// Construct the MountSource with the session and superBlockFlags.
-	m := fs.NewMountSource(s, filesystem, superBlockFlags)
+	m := fs.NewMountSource(ctx, s, filesystem, superBlockFlags)
 
 	// Given that gofer files can consume host FDs, restrict the number
 	// of files that can be held by the cache.
@@ -286,7 +286,7 @@ func Root(ctx context.Context, dev string, filesystem fs.Filesystem, superBlockF
 	}
 
 	sattr, iops := newInodeOperations(ctx, s, s.attach, qid, valid, attr, false)
-	return fs.NewInode(iops, m, sattr), nil
+	return fs.NewInode(ctx, iops, m, sattr), nil
 }
 
 // newEndpointMaps creates a new endpointMaps.
diff --git a/pkg/sentry/fs/gofer/socket.go b/pkg/sentry/fs/gofer/socket.go
index 6a9994264..a45a8f36c 100644
--- a/pkg/sentry/fs/gofer/socket.go
+++ b/pkg/sentry/fs/gofer/socket.go
@@ -18,6 +18,7 @@ import (
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/log"
 	"gvisor.dev/gvisor/pkg/p9"
+	"gvisor.dev/gvisor/pkg/sentry/context"
 	"gvisor.dev/gvisor/pkg/sentry/fs"
 	"gvisor.dev/gvisor/pkg/sentry/fs/host"
 	"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
@@ -75,7 +76,7 @@ func sockTypeToP9(t linux.SockType) (p9.ConnectFlags, bool) {
 }
 
 // BidirectionalConnect implements ConnectableEndpoint.BidirectionalConnect.
-func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnConnect func(transport.Receiver, transport.ConnectedEndpoint)) *syserr.Error {
+func (e *endpoint) BidirectionalConnect(ctx context.Context, ce transport.ConnectingEndpoint, returnConnect func(transport.Receiver, transport.ConnectedEndpoint)) *syserr.Error {
 	cf, ok := sockTypeToP9(ce.Type())
 	if !ok {
 		return syserr.ErrConnectionRefused
@@ -100,7 +101,7 @@ func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnC
 		return syserr.ErrConnectionRefused
 	}
 
-	c, serr := host.NewConnectedEndpoint(hostFile, ce.WaiterQueue(), e.path)
+	c, serr := host.NewConnectedEndpoint(ctx, hostFile, ce.WaiterQueue(), e.path)
 	if serr != nil {
 		ce.Unlock()
 		log.Warningf("Gofer returned invalid host socket for BidirectionalConnect; file %+v flags %+v: %v", e.file, cf, serr)
@@ -116,13 +117,13 @@ func (e *endpoint) BidirectionalConnect(ce transport.ConnectingEndpoint, returnC
 
 // UnidirectionalConnect implements
 // transport.BoundEndpoint.UnidirectionalConnect.
-func (e *endpoint) UnidirectionalConnect() (transport.ConnectedEndpoint, *syserr.Error) {
+func (e *endpoint) UnidirectionalConnect(ctx context.Context) (transport.ConnectedEndpoint, *syserr.Error) {
 	hostFile, err := e.file.Connect(p9.DgramSocket)
 	if err != nil {
 		return nil, syserr.ErrConnectionRefused
 	}
 
-	c, serr := host.NewConnectedEndpoint(hostFile, &waiter.Queue{}, e.path)
+	c, serr := host.NewConnectedEndpoint(ctx, hostFile, &waiter.Queue{}, e.path)
 	if serr != nil {
 		log.Warningf("Gofer returned invalid host socket for UnidirectionalConnect; file %+v: %v", e.file, serr)
 		return nil, serr
diff --git a/pkg/sentry/fs/host/file.go b/pkg/sentry/fs/host/file.go
index 45d5c8695..bd665a6b1 100644
--- a/pkg/sentry/fs/host/file.go
+++ b/pkg/sentry/fs/host/file.go
@@ -109,7 +109,7 @@ func newFileFromDonatedFD(ctx context.Context, donated int, mounter fs.FileOwner
 		iops := inode.InodeOperations.(*inodeOperations)
 
 		name := fmt.Sprintf("host:[%d]", inode.StableAttr.InodeID)
-		dirent := fs.NewDirent(inode, name)
+		dirent := fs.NewDirent(ctx, inode, name)
 		defer dirent.DecRef()
 
 		if isTTY {
diff --git a/pkg/sentry/fs/host/fs.go b/pkg/sentry/fs/host/fs.go
index 914d95d27..68d2697c0 100644
--- a/pkg/sentry/fs/host/fs.go
+++ b/pkg/sentry/fs/host/fs.go
@@ -262,7 +262,7 @@ func childDentAttrs(ctx context.Context, d *fs.Dirent) map[string]fs.DentAttr {
 // newMountSource constructs a new host fs.MountSource
 // relative to a root path. The root should match the mount point.
 func newMountSource(ctx context.Context, root string, mounter fs.FileOwner, filesystem fs.Filesystem, flags fs.MountSourceFlags, dontTranslateOwnership bool) *fs.MountSource {
-	return fs.NewMountSource(&superOperations{
+	return fs.NewMountSource(ctx, &superOperations{
 		root:                   root,
 		inodeMappings:          make(map[uint64]string),
 		mounter:                mounter,
diff --git a/pkg/sentry/fs/host/inode.go b/pkg/sentry/fs/host/inode.go
index ca352a8c2..679d8321a 100644
--- a/pkg/sentry/fs/host/inode.go
+++ b/pkg/sentry/fs/host/inode.go
@@ -205,7 +205,7 @@ func newInode(ctx context.Context, msrc *fs.MountSource, fd int, saveable bool,
 	}
 
 	// Return the fs.Inode.
-	return fs.NewInode(iops, msrc, fileState.sattr), nil
+	return fs.NewInode(ctx, iops, msrc, fileState.sattr), nil
 }
 
 // Mappable implements fs.InodeOperations.Mappable.
@@ -245,7 +245,7 @@ func (i *inodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name string
 	}
 
 	// Return the fs.Dirent.
-	return fs.NewDirent(inode, name), nil
+	return fs.NewDirent(ctx, inode, name), nil
 }
 
 // Create implements fs.InodeOperations.Create.
@@ -265,7 +265,7 @@ func (i *inodeOperations) Create(ctx context.Context, dir *fs.Inode, name string
 		return nil, err
 	}
 
-	d := fs.NewDirent(inode, name)
+	d := fs.NewDirent(ctx, inode, name)
 	defer d.DecRef()
 	return inode.GetFile(ctx, d, flags)
 }
diff --git a/pkg/sentry/fs/host/inode_test.go b/pkg/sentry/fs/host/inode_test.go
index bd2d856ee..18994c456 100644
--- a/pkg/sentry/fs/host/inode_test.go
+++ b/pkg/sentry/fs/host/inode_test.go
@@ -56,7 +56,7 @@ func TestMultipleReaddir(t *testing.T) {
 		t.Fatalf("Failed to create inode: %v", err)
 	}
 
-	dirent := fs.NewDirent(n, "readdir")
+	dirent := fs.NewDirent(ctx, n, "readdir")
 	openFile, err := n.GetFile(ctx, dirent, fs.FileFlags{Read: true})
 	if err != nil {
 		t.Fatalf("Failed to get file: %v", err)
diff --git a/pkg/sentry/fs/host/socket.go b/pkg/sentry/fs/host/socket.go
index a40890b41..7fedc88bc 100644
--- a/pkg/sentry/fs/host/socket.go
+++ b/pkg/sentry/fs/host/socket.go
@@ -118,7 +118,7 @@ func (c *ConnectedEndpoint) init() *syserr.Error {
 // The caller is responsible for calling Init(). Additionaly, Release needs to
 // be called twice because ConnectedEndpoint is both a transport.Receiver and
 // transport.ConnectedEndpoint.
-func NewConnectedEndpoint(file *fd.FD, queue *waiter.Queue, path string) (*ConnectedEndpoint, *syserr.Error) {
+func NewConnectedEndpoint(ctx context.Context, file *fd.FD, queue *waiter.Queue, path string) (*ConnectedEndpoint, *syserr.Error) {
 	e := ConnectedEndpoint{
 		path:  path,
 		queue: queue,
@@ -151,7 +151,7 @@ func (c *ConnectedEndpoint) Init() {
 func NewSocketWithDirent(ctx context.Context, d *fs.Dirent, f *fd.FD, flags fs.FileFlags) (*fs.File, error) {
 	f2 := fd.New(f.FD())
 	var q waiter.Queue
-	e, err := NewConnectedEndpoint(f2, &q, "" /* path */)
+	e, err := NewConnectedEndpoint(ctx, f2, &q, "" /* path */)
 	if err != nil {
 		f2.Release()
 		return nil, err.ToError()
@@ -162,7 +162,7 @@ func NewSocketWithDirent(ctx context.Context, d *fs.Dirent, f *fd.FD, flags fs.F
 
 	e.Init()
 
-	ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
+	ep := transport.NewExternal(ctx, e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
 
 	return unixsocket.NewWithDirent(ctx, d, ep, e.stype, flags), nil
 }
@@ -181,7 +181,7 @@ func newSocket(ctx context.Context, orgfd int, saveable bool) (*fs.File, error)
 	}
 	f := fd.New(ownedfd)
 	var q waiter.Queue
-	e, err := NewConnectedEndpoint(f, &q, "" /* path */)
+	e, err := NewConnectedEndpoint(ctx, f, &q, "" /* path */)
 	if err != nil {
 		if saveable {
 			f.Close()
@@ -194,7 +194,7 @@ func newSocket(ctx context.Context, orgfd int, saveable bool) (*fs.File, error)
 	e.srfd = srfd
 	e.Init()
 
-	ep := transport.NewExternal(e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
+	ep := transport.NewExternal(ctx, e.stype, uniqueid.GlobalProviderFromContext(ctx), &q, e, e)
 
 	return unixsocket.New(ctx, ep, e.stype), nil
 }
diff --git a/pkg/sentry/fs/inode.go b/pkg/sentry/fs/inode.go
index a19744ab1..a889586aa 100644
--- a/pkg/sentry/fs/inode.go
+++ b/pkg/sentry/fs/inode.go
@@ -76,7 +76,7 @@ type LockCtx struct {
 // NewInode constructs an Inode from InodeOperations, a MountSource, and stable attributes.
 //
 // NewInode takes a reference on msrc.
-func NewInode(iops InodeOperations, msrc *MountSource, sattr StableAttr) *Inode {
+func NewInode(ctx context.Context, iops InodeOperations, msrc *MountSource, sattr StableAttr) *Inode {
 	msrc.IncRef()
 	return &Inode{
 		InodeOperations: iops,
diff --git a/pkg/sentry/fs/inode_overlay.go b/pkg/sentry/fs/inode_overlay.go
index 805187f60..57b8b14e3 100644
--- a/pkg/sentry/fs/inode_overlay.go
+++ b/pkg/sentry/fs/inode_overlay.go
@@ -111,7 +111,7 @@ func overlayLookup(ctx context.Context, parent *overlayEntry, inode *Inode, name
 				parent.copyMu.RUnlock()
 				return nil, false, err
 			}
-			d, err := NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil
+			d, err := NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil
 			parent.copyMu.RUnlock()
 			return d, true, err
 		}
@@ -201,7 +201,7 @@ func overlayLookup(ctx context.Context, parent *overlayEntry, inode *Inode, name
 		parent.copyMu.RUnlock()
 		return nil, false, err
 	}
-	d, err := NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil
+	d, err := NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil
 	parent.copyMu.RUnlock()
 	return d, upperInode != nil, err
 }
@@ -245,7 +245,7 @@ func overlayCreate(ctx context.Context, o *overlayEntry, parent *Dirent, name st
 	// overlay file.
 	overlayInode := newOverlayInode(ctx, entry, parent.Inode.MountSource)
 	// d will own the inode reference.
-	overlayDirent := NewDirent(overlayInode, name)
+	overlayDirent := NewDirent(ctx, overlayInode, name)
 	// The overlay file created below with NewFile will take a reference on
 	// the overlayDirent, and it should be the only thing holding a
 	// reference at the time of creation, so we must drop this reference.
@@ -422,7 +422,7 @@ func overlayBind(ctx context.Context, o *overlayEntry, parent *Dirent, name stri
 		inode.DecRef()
 		return nil, err
 	}
-	return NewDirent(newOverlayInode(ctx, entry, inode.MountSource), name), nil
+	return NewDirent(ctx, newOverlayInode(ctx, entry, inode.MountSource), name), nil
 }
 
 func overlayBoundEndpoint(o *overlayEntry, path string) transport.BoundEndpoint {
@@ -648,13 +648,13 @@ func NewTestOverlayDir(ctx context.Context, upper, lower *Inode, revalidate bool
 	fs := &overlayFilesystem{}
 	var upperMsrc *MountSource
 	if revalidate {
-		upperMsrc = NewRevalidatingMountSource(fs, MountSourceFlags{})
+		upperMsrc = NewRevalidatingMountSource(ctx, fs, MountSourceFlags{})
 	} else {
-		upperMsrc = NewNonCachingMountSource(fs, MountSourceFlags{})
+		upperMsrc = NewNonCachingMountSource(ctx, fs, MountSourceFlags{})
 	}
-	msrc := NewMountSource(&overlayMountSourceOperations{
+	msrc := NewMountSource(ctx, &overlayMountSourceOperations{
 		upper: upperMsrc,
-		lower: NewNonCachingMountSource(fs, MountSourceFlags{}),
+		lower: NewNonCachingMountSource(ctx, fs, MountSourceFlags{}),
 	}, fs, MountSourceFlags{})
 	overlay := &overlayEntry{
 		upper: upper,
diff --git a/pkg/sentry/fs/inode_overlay_test.go b/pkg/sentry/fs/inode_overlay_test.go
index 7e56d5969..8935aad65 100644
--- a/pkg/sentry/fs/inode_overlay_test.go
+++ b/pkg/sentry/fs/inode_overlay_test.go
@@ -275,12 +275,12 @@ func TestLookupRevalidation(t *testing.T) {
 		},
 	} {
 		t.Run(tc.desc, func(t *testing.T) {
-			root := fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root")
+			root := fs.NewDirent(ctx, newTestRamfsDir(ctx, nil, nil), "root")
 			ctx = &rootContext{
 				Context: ctx,
 				root:    root,
 			}
-			overlay := fs.NewDirent(fs.NewTestOverlayDir(ctx, tc.upper, tc.lower, tc.revalidate), "overlay")
+			overlay := fs.NewDirent(ctx, fs.NewTestOverlayDir(ctx, tc.upper, tc.lower, tc.revalidate), "overlay")
 			// Lookup the file twice through the overlay.
 			first, err := overlay.Walk(ctx, root, fileName)
 			if err != nil {
@@ -442,7 +442,7 @@ func (f *dirFile) Readdir(ctx context.Context, file *fs.File, ser fs.DentrySeria
 }
 
 func newTestRamfsInode(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
-	inode := fs.NewInode(&inode{
+	inode := fs.NewInode(ctx, &inode{
 		InodeStaticFileGetter: fsutil.InodeStaticFileGetter{
 			Contents: []byte("foobar"),
 		},
@@ -451,7 +451,7 @@ func newTestRamfsInode(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 }
 
 func newTestRamfsDir(ctx context.Context, contains []dirContent, negative []string) *fs.Inode {
-	msrc := fs.NewPseudoMountSource()
+	msrc := fs.NewPseudoMountSource(ctx)
 	contents := make(map[string]*fs.Inode)
 	for _, c := range contains {
 		if c.dir {
@@ -463,7 +463,7 @@ func newTestRamfsDir(ctx context.Context, contains []dirContent, negative []stri
 	dops := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermissions{
 		User: fs.PermMask{Read: true, Execute: true},
 	})
-	return fs.NewInode(&dir{
+	return fs.NewInode(ctx, &dir{
 		InodeOperations: dops,
 		negative:        negative,
 	}, msrc, fs.StableAttr{Type: fs.Directory})
diff --git a/pkg/sentry/fs/mock.go b/pkg/sentry/fs/mock.go
index c4e12acfe..b3c4ad80b 100644
--- a/pkg/sentry/fs/mock.go
+++ b/pkg/sentry/fs/mock.go
@@ -34,7 +34,7 @@ type MockInodeOperations struct {
 
 // NewMockInode returns a mock *Inode using MockInodeOperations.
 func NewMockInode(ctx context.Context, msrc *MountSource, sattr StableAttr) *Inode {
-	return NewInode(NewMockInodeOperations(ctx), msrc, sattr)
+	return NewInode(ctx, NewMockInodeOperations(ctx), msrc, sattr)
 }
 
 // NewMockInodeOperations returns a *MockInodeOperations.
@@ -93,7 +93,7 @@ func (n *MockInodeOperations) IsVirtual() bool {
 // Lookup implements fs.InodeOperations.Lookup.
 func (n *MockInodeOperations) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) {
 	n.walkCalled = true
-	return NewDirent(NewInode(&MockInodeOperations{}, dir.MountSource, StableAttr{}), p), nil
+	return NewDirent(ctx, NewInode(ctx, &MockInodeOperations{}, dir.MountSource, StableAttr{}), p), nil
 }
 
 // SetPermissions implements fs.InodeOperations.SetPermissions.
@@ -114,7 +114,7 @@ func (n *MockInodeOperations) SetTimestamps(context.Context, *Inode, TimeSpec) e
 // Create implements fs.InodeOperations.Create.
 func (n *MockInodeOperations) Create(ctx context.Context, dir *Inode, p string, flags FileFlags, perms FilePermissions) (*File, error) {
 	n.createCalled = true
-	d := NewDirent(NewInode(&MockInodeOperations{}, dir.MountSource, StableAttr{}), p)
+	d := NewDirent(ctx, NewInode(ctx, &MockInodeOperations{}, dir.MountSource, StableAttr{}), p)
 	return &File{Dirent: d}, nil
 }
 
diff --git a/pkg/sentry/fs/mount.go b/pkg/sentry/fs/mount.go
index ae9a4279a..2eb6a9d82 100644
--- a/pkg/sentry/fs/mount.go
+++ b/pkg/sentry/fs/mount.go
@@ -127,7 +127,7 @@ const DefaultDirentCacheSize uint64 = 1000
 
 // NewMountSource returns a new MountSource. Filesystem may be nil if there is no
 // filesystem backing the mount.
-func NewMountSource(mops MountSourceOperations, filesystem Filesystem, flags MountSourceFlags) *MountSource {
+func NewMountSource(ctx context.Context, mops MountSourceOperations, filesystem Filesystem, flags MountSourceFlags) *MountSource {
 	fsType := "none"
 	if filesystem != nil {
 		fsType = filesystem.Name()
@@ -188,16 +188,16 @@ func (msrc *MountSource) SetDirentCacheLimiter(l *DirentCacheLimiter) {
 
 // NewCachingMountSource returns a generic mount that will cache dirents
 // aggressively.
-func NewCachingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource {
-	return NewMountSource(&SimpleMountSourceOperations{
+func NewCachingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource {
+	return NewMountSource(ctx, &SimpleMountSourceOperations{
 		keep:       true,
 		revalidate: false,
 	}, filesystem, flags)
 }
 
 // NewNonCachingMountSource returns a generic mount that will never cache dirents.
-func NewNonCachingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource {
-	return NewMountSource(&SimpleMountSourceOperations{
+func NewNonCachingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource {
+	return NewMountSource(ctx, &SimpleMountSourceOperations{
 		keep:       false,
 		revalidate: false,
 	}, filesystem, flags)
@@ -205,8 +205,8 @@ func NewNonCachingMountSource(filesystem Filesystem, flags MountSourceFlags) *Mo
 
 // NewRevalidatingMountSource returns a generic mount that will cache dirents,
 // but will revalidate them on each lookup.
-func NewRevalidatingMountSource(filesystem Filesystem, flags MountSourceFlags) *MountSource {
-	return NewMountSource(&SimpleMountSourceOperations{
+func NewRevalidatingMountSource(ctx context.Context, filesystem Filesystem, flags MountSourceFlags) *MountSource {
+	return NewMountSource(ctx, &SimpleMountSourceOperations{
 		keep:       true,
 		revalidate: true,
 	}, filesystem, flags)
@@ -214,8 +214,8 @@ func NewRevalidatingMountSource(filesystem Filesystem, flags MountSourceFlags) *
 
 // NewPseudoMountSource returns a "pseudo" mount source that is not backed by
 // an actual filesystem. It is always non-caching.
-func NewPseudoMountSource() *MountSource {
-	return NewMountSource(&SimpleMountSourceOperations{
+func NewPseudoMountSource(ctx context.Context) *MountSource {
+	return NewMountSource(ctx, &SimpleMountSourceOperations{
 		keep:       false,
 		revalidate: false,
 	}, nil, MountSourceFlags{})
diff --git a/pkg/sentry/fs/mount_overlay.go b/pkg/sentry/fs/mount_overlay.go
index cb413e8dc..bc0ce7adc 100644
--- a/pkg/sentry/fs/mount_overlay.go
+++ b/pkg/sentry/fs/mount_overlay.go
@@ -28,10 +28,10 @@ type overlayMountSourceOperations struct {
 	lower *MountSource
 }
 
-func newOverlayMountSource(upper, lower *MountSource, flags MountSourceFlags) *MountSource {
+func newOverlayMountSource(ctx context.Context, upper, lower *MountSource, flags MountSourceFlags) *MountSource {
 	upper.IncRef()
 	lower.IncRef()
-	msrc := NewMountSource(&overlayMountSourceOperations{
+	msrc := NewMountSource(ctx, &overlayMountSourceOperations{
 		upper: upper,
 		lower: lower,
 	}, &overlayFilesystem{}, flags)
diff --git a/pkg/sentry/fs/mounts.go b/pkg/sentry/fs/mounts.go
index c15d76e90..a5d6f8b9a 100644
--- a/pkg/sentry/fs/mounts.go
+++ b/pkg/sentry/fs/mounts.go
@@ -166,7 +166,7 @@ func NewMountNamespace(ctx context.Context, root *Inode) (*MountNamespace, error
 
 	// Set the root dirent and id on the root mount. The reference returned from
 	// NewDirent will be donated to the MountNamespace constructed below.
-	d := NewDirent(root, "/")
+	d := NewDirent(ctx, root, "/")
 
 	mnts := map[*Dirent]*Mount{
 		d: newRootMount(1, d),
diff --git a/pkg/sentry/fs/mounts_test.go b/pkg/sentry/fs/mounts_test.go
index 764318895..c4c771f2c 100644
--- a/pkg/sentry/fs/mounts_test.go
+++ b/pkg/sentry/fs/mounts_test.go
@@ -30,17 +30,17 @@ import (
 //   |-bar (file)
 func createMountNamespace(ctx context.Context) (*fs.MountNamespace, error) {
 	perms := fs.FilePermsFromMode(0777)
-	m := fs.NewPseudoMountSource()
+	m := fs.NewPseudoMountSource(ctx)
 
 	barFile := fsutil.NewSimpleFileInode(ctx, fs.RootOwner, perms, 0)
 	fooDir := ramfs.NewDir(ctx, map[string]*fs.Inode{
-		"bar": fs.NewInode(barFile, m, fs.StableAttr{Type: fs.RegularFile}),
+		"bar": fs.NewInode(ctx, barFile, m, fs.StableAttr{Type: fs.RegularFile}),
 	}, fs.RootOwner, perms)
 	rootDir := ramfs.NewDir(ctx, map[string]*fs.Inode{
-		"foo": fs.NewInode(fooDir, m, fs.StableAttr{Type: fs.Directory}),
+		"foo": fs.NewInode(ctx, fooDir, m, fs.StableAttr{Type: fs.Directory}),
 	}, fs.RootOwner, perms)
 
-	return fs.NewMountNamespace(ctx, fs.NewInode(rootDir, m, fs.StableAttr{Type: fs.Directory}))
+	return fs.NewMountNamespace(ctx, fs.NewInode(ctx, rootDir, m, fs.StableAttr{Type: fs.Directory}))
 }
 
 func TestFindLink(t *testing.T) {
diff --git a/pkg/sentry/fs/overlay.go b/pkg/sentry/fs/overlay.go
index 0ad11131c..c87f24997 100644
--- a/pkg/sentry/fs/overlay.go
+++ b/pkg/sentry/fs/overlay.go
@@ -104,7 +104,7 @@ func NewOverlayRoot(ctx context.Context, upper *Inode, lower *Inode, flags Mount
 		return nil, fmt.Errorf("cannot nest overlay in upper file of another overlay")
 	}
 
-	msrc := newOverlayMountSource(upper.MountSource, lower.MountSource, flags)
+	msrc := newOverlayMountSource(ctx, upper.MountSource, lower.MountSource, flags)
 	overlay, err := newOverlayEntry(ctx, upper, lower, true)
 	if err != nil {
 		msrc.DecRef()
@@ -127,7 +127,7 @@ func NewOverlayRootFile(ctx context.Context, upperMS *MountSource, lower *Inode,
 	if !IsRegular(lower.StableAttr) {
 		return nil, fmt.Errorf("lower Inode is not a regular file")
 	}
-	msrc := newOverlayMountSource(upperMS, lower.MountSource, flags)
+	msrc := newOverlayMountSource(ctx, upperMS, lower.MountSource, flags)
 	overlay, err := newOverlayEntry(ctx, nil, lower, true)
 	if err != nil {
 		msrc.DecRef()
@@ -140,9 +140,9 @@ func NewOverlayRootFile(ctx context.Context, upperMS *MountSource, lower *Inode,
 func newOverlayInode(ctx context.Context, o *overlayEntry, msrc *MountSource) *Inode {
 	var inode *Inode
 	if o.upper != nil {
-		inode = NewInode(nil, msrc, o.upper.StableAttr)
+		inode = NewInode(ctx, nil, msrc, o.upper.StableAttr)
 	} else {
-		inode = NewInode(nil, msrc, o.lower.StableAttr)
+		inode = NewInode(ctx, nil, msrc, o.lower.StableAttr)
 	}
 	inode.overlay = o
 	return inode
diff --git a/pkg/sentry/fs/proc/exec_args.go b/pkg/sentry/fs/proc/exec_args.go
index 9de0177e8..1d3a2d426 100644
--- a/pkg/sentry/fs/proc/exec_args.go
+++ b/pkg/sentry/fs/proc/exec_args.go
@@ -64,7 +64,7 @@ func newExecArgInode(t *kernel.Task, msrc *fs.MountSource, arg execArgType) *fs.
 		arg:             arg,
 		t:               t,
 	}
-	return newProcInode(f, msrc, fs.SpecialFile, t)
+	return newProcInode(t, f, msrc, fs.SpecialFile, t)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
diff --git a/pkg/sentry/fs/proc/fds.go b/pkg/sentry/fs/proc/fds.go
index 1e4e72b87..ea7aded9a 100644
--- a/pkg/sentry/fs/proc/fds.go
+++ b/pkg/sentry/fs/proc/fds.go
@@ -105,7 +105,7 @@ func newFd(t *kernel.Task, f *fs.File, msrc *fs.MountSource) *fs.Inode {
 		Symlink: *ramfs.NewSymlink(t, fs.RootOwner, ""),
 		file:    f,
 	}
-	return newProcInode(fd, msrc, fs.Symlink, t)
+	return newProcInode(t, fd, msrc, fs.Symlink, t)
 }
 
 // GetFile returns the fs.File backing this fd.  The dirent and flags
@@ -168,7 +168,7 @@ func newFdDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		Dir: *ramfs.NewDir(t, nil, fs.RootOwner, fs.FilePermissions{User: fs.PermMask{Read: true, Execute: true}}),
 		t:   t,
 	}
-	return newProcInode(f, msrc, fs.SpecialDirectory, t)
+	return newProcInode(t, f, msrc, fs.SpecialDirectory, t)
 }
 
 // Check implements InodeOperations.Check.
@@ -198,7 +198,7 @@ func (f *fdDir) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs.Dirent
 	if err != nil {
 		return nil, err
 	}
-	return fs.NewDirent(n, p), nil
+	return fs.NewDirent(ctx, n, p), nil
 }
 
 // GetFile implements fs.FileOperations.GetFile.
@@ -252,7 +252,7 @@ func newFdInfoDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		Dir: *ramfs.NewDir(t, nil, fs.RootOwner, fs.FilePermsFromMode(0500)),
 		t:   t,
 	}
-	return newProcInode(fdid, msrc, fs.SpecialDirectory, t)
+	return newProcInode(t, fdid, msrc, fs.SpecialDirectory, t)
 }
 
 // Lookup loads an fd in /proc/TID/fdinfo into a Dirent.
@@ -272,7 +272,7 @@ func (fdid *fdInfoDir) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs
 	if err != nil {
 		return nil, err
 	}
-	return fs.NewDirent(inode, p), nil
+	return fs.NewDirent(ctx, inode, p), nil
 }
 
 // GetFile implements fs.FileOperations.GetFile.
diff --git a/pkg/sentry/fs/proc/fs.go b/pkg/sentry/fs/proc/fs.go
index f4ac4949a..715591ae5 100644
--- a/pkg/sentry/fs/proc/fs.go
+++ b/pkg/sentry/fs/proc/fs.go
@@ -77,5 +77,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 
 	// Construct the procfs root. Since procfs files are all virtual, we
 	// never want them cached.
-	return New(ctx, fs.NewNonCachingMountSource(f, flags), cgroups)
+	return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags), cgroups)
 }
diff --git a/pkg/sentry/fs/proc/inode.go b/pkg/sentry/fs/proc/inode.go
index 1d81488cd..0c04f81fa 100644
--- a/pkg/sentry/fs/proc/inode.go
+++ b/pkg/sentry/fs/proc/inode.go
@@ -115,11 +115,11 @@ func newStaticProcInode(ctx context.Context, msrc *fs.MountSource, contents []by
 			Contents: contents,
 		},
 	}
-	return newProcInode(iops, msrc, fs.SpecialFile, nil)
+	return newProcInode(ctx, iops, msrc, fs.SpecialFile, nil)
 }
 
 // newProcInode creates a new inode from the given inode operations.
-func newProcInode(iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeType, t *kernel.Task) *fs.Inode {
+func newProcInode(ctx context.Context, iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeType, t *kernel.Task) *fs.Inode {
 	sattr := fs.StableAttr{
 		DeviceID:  device.ProcDevice.DeviceID(),
 		InodeID:   device.ProcDevice.NextIno(),
@@ -129,5 +129,5 @@ func newProcInode(iops fs.InodeOperations, msrc *fs.MountSource, typ fs.InodeTyp
 	if t != nil {
 		iops = &taskOwnedInodeOps{iops, t}
 	}
-	return fs.NewInode(iops, msrc, sattr)
+	return fs.NewInode(ctx, iops, msrc, sattr)
 }
diff --git a/pkg/sentry/fs/proc/net.go b/pkg/sentry/fs/proc/net.go
index cbc8f4dbf..caa1a5c4d 100644
--- a/pkg/sentry/fs/proc/net.go
+++ b/pkg/sentry/fs/proc/net.go
@@ -70,7 +70,7 @@ func (p *proc) newNetDir(ctx context.Context, k *kernel.Kernel, msrc *fs.MountSo
 		}
 	}
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 // ifinet6 implements seqfile.SeqSource for /proc/net/if_inet6.
diff --git a/pkg/sentry/fs/proc/proc.go b/pkg/sentry/fs/proc/proc.go
index 170e2af4f..0ef13f2f5 100644
--- a/pkg/sentry/fs/proc/proc.go
+++ b/pkg/sentry/fs/proc/proc.go
@@ -68,7 +68,7 @@ func New(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string
 		"filesystems": seqfile.NewSeqFileInode(ctx, &filesystemsData{}, msrc),
 		"loadavg":     seqfile.NewSeqFileInode(ctx, &loadavgData{}, msrc),
 		"meminfo":     seqfile.NewSeqFileInode(ctx, &meminfoData{k}, msrc),
-		"mounts":      newProcInode(ramfs.NewSymlink(ctx, fs.RootOwner, "self/mounts"), msrc, fs.Symlink, nil),
+		"mounts":      newProcInode(ctx, ramfs.NewSymlink(ctx, fs.RootOwner, "self/mounts"), msrc, fs.Symlink, nil),
 		"self":        newSelf(ctx, pidns, msrc),
 		"stat":        seqfile.NewSeqFileInode(ctx, &statData{k}, msrc),
 		"thread-self": newThreadSelf(ctx, pidns, msrc),
@@ -94,7 +94,7 @@ func New(ctx context.Context, msrc *fs.MountSource, cgroupControllers map[string
 		p.AddChild(ctx, "net", p.newNetDir(ctx, k, msrc))
 	}
 
-	return newProcInode(p, msrc, fs.SpecialDirectory, nil), nil
+	return newProcInode(ctx, p, msrc, fs.SpecialDirectory, nil), nil
 }
 
 // self is a magical link.
@@ -112,7 +112,7 @@ func newSelf(ctx context.Context, pidns *kernel.PIDNamespace, msrc *fs.MountSour
 		Symlink: *ramfs.NewSymlink(ctx, fs.RootOwner, ""),
 		pidns:   pidns,
 	}
-	return newProcInode(s, msrc, fs.Symlink, nil)
+	return newProcInode(ctx, s, msrc, fs.Symlink, nil)
 }
 
 // newThreadSelf returns a new "threadSelf" node.
@@ -121,7 +121,7 @@ func newThreadSelf(ctx context.Context, pidns *kernel.PIDNamespace, msrc *fs.Mou
 		Symlink: *ramfs.NewSymlink(ctx, fs.RootOwner, ""),
 		pidns:   pidns,
 	}
-	return newProcInode(s, msrc, fs.Symlink, nil)
+	return newProcInode(ctx, s, msrc, fs.Symlink, nil)
 }
 
 // Readlink implements fs.InodeOperations.Readlink.
@@ -185,7 +185,7 @@ func (p *proc) Lookup(ctx context.Context, dir *fs.Inode, name string) (*fs.Dire
 
 	// Wrap it in a taskDir.
 	td := p.newTaskDir(otherTask, dir.MountSource, true)
-	return fs.NewDirent(td, name), nil
+	return fs.NewDirent(ctx, td, name), nil
 }
 
 // GetFile implements fs.InodeOperations.
diff --git a/pkg/sentry/fs/proc/rpcinet_proc.go b/pkg/sentry/fs/proc/rpcinet_proc.go
index d37a83501..c1405a746 100644
--- a/pkg/sentry/fs/proc/rpcinet_proc.go
+++ b/pkg/sentry/fs/proc/rpcinet_proc.go
@@ -45,7 +45,7 @@ func newRPCInetInode(ctx context.Context, msrc *fs.MountSource, filepath string,
 		filepath:        filepath,
 		k:               kernel.KernelFromContext(ctx),
 	}
-	return newProcInode(f, msrc, fs.SpecialFile, nil)
+	return newProcInode(ctx, f, msrc, fs.SpecialFile, nil)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
@@ -141,7 +141,7 @@ func newRPCInetProcNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 // newRPCInetProcSysNet will build an inode for /proc/sys/net.
@@ -152,7 +152,7 @@ func newRPCInetProcSysNet(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 // newRPCInetSysNetCore builds the /proc/sys/net/core directory.
@@ -170,7 +170,7 @@ func newRPCInetSysNetCore(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 // newRPCInetSysNetIPv4Dir builds the /proc/sys/net/ipv4 directory.
@@ -213,5 +213,5 @@ func newRPCInetSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource) *fs.Inod
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
diff --git a/pkg/sentry/fs/proc/seqfile/seqfile.go b/pkg/sentry/fs/proc/seqfile/seqfile.go
index 8ee7f5fa5..d5590e2d3 100644
--- a/pkg/sentry/fs/proc/seqfile/seqfile.go
+++ b/pkg/sentry/fs/proc/seqfile/seqfile.go
@@ -133,7 +133,7 @@ func NewSeqFileInode(ctx context.Context, source SeqSource, msrc *fs.MountSource
 		BlockSize: usermem.PageSize,
 		Type:      fs.SpecialFile,
 	}
-	return fs.NewInode(iops, msrc, sattr)
+	return fs.NewInode(ctx, iops, msrc, sattr)
 }
 
 // UnstableAttr returns unstable attributes of the SeqFile.
diff --git a/pkg/sentry/fs/proc/seqfile/seqfile_test.go b/pkg/sentry/fs/proc/seqfile/seqfile_test.go
index aa795164d..ebfeee835 100644
--- a/pkg/sentry/fs/proc/seqfile/seqfile_test.go
+++ b/pkg/sentry/fs/proc/seqfile/seqfile_test.go
@@ -120,15 +120,15 @@ func TestSeqFile(t *testing.T) {
 	testSource.Init()
 
 	// Create a file that can be R/W.
-	m := fs.NewPseudoMountSource()
 	ctx := contexttest.Context(t)
+	m := fs.NewPseudoMountSource(ctx)
 	contents := map[string]*fs.Inode{
 		"foo": NewSeqFileInode(ctx, testSource, m),
 	}
 	root := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0777))
 
 	// How about opening it?
-	inode := fs.NewInode(root, m, fs.StableAttr{Type: fs.Directory})
+	inode := fs.NewInode(ctx, root, m, fs.StableAttr{Type: fs.Directory})
 	dirent2, err := root.Lookup(ctx, inode, "foo")
 	if err != nil {
 		t.Fatalf("failed to walk to foo for n2: %v", err)
@@ -196,15 +196,15 @@ func TestSeqFileFileUpdated(t *testing.T) {
 	testSource.update = true
 
 	// Create a file that can be R/W.
-	m := fs.NewPseudoMountSource()
 	ctx := contexttest.Context(t)
+	m := fs.NewPseudoMountSource(ctx)
 	contents := map[string]*fs.Inode{
 		"foo": NewSeqFileInode(ctx, testSource, m),
 	}
 	root := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0777))
 
 	// How about opening it?
-	inode := fs.NewInode(root, m, fs.StableAttr{Type: fs.Directory})
+	inode := fs.NewInode(ctx, root, m, fs.StableAttr{Type: fs.Directory})
 	dirent2, err := root.Lookup(ctx, inode, "foo")
 	if err != nil {
 		t.Fatalf("failed to walk to foo for dirent2: %v", err)
diff --git a/pkg/sentry/fs/proc/sys.go b/pkg/sentry/fs/proc/sys.go
index 4288b9a36..cd37776c8 100644
--- a/pkg/sentry/fs/proc/sys.go
+++ b/pkg/sentry/fs/proc/sys.go
@@ -82,14 +82,14 @@ func (p *proc) newKernelDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode
 	}
 
 	children := map[string]*fs.Inode{
-		"hostname": newProcInode(&h, msrc, fs.SpecialFile, nil),
+		"hostname": newProcInode(ctx, &h, msrc, fs.SpecialFile, nil),
 		"shmall":   newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMALL, 10))),
 		"shmmax":   newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMMAX, 10))),
 		"shmmni":   newStaticProcInode(ctx, msrc, []byte(strconv.FormatUint(linux.SHMMNI, 10))),
 	}
 
 	d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
@@ -98,7 +98,7 @@ func (p *proc) newVMDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 		"overcommit_memory": seqfile.NewSeqFileInode(ctx, &overcommitMemory{}, msrc),
 	}
 	d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 func (p *proc) newSysDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
@@ -115,7 +115,7 @@ func (p *proc) newSysDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	}
 
 	d := ramfs.NewDir(ctx, children, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 // hostname is the inode for a file containing the system hostname.
diff --git a/pkg/sentry/fs/proc/sys_net.go b/pkg/sentry/fs/proc/sys_net.go
index 7e05240f8..f3b63dfc2 100644
--- a/pkg/sentry/fs/proc/sys_net.go
+++ b/pkg/sentry/fs/proc/sys_net.go
@@ -74,7 +74,7 @@ func newTCPMemInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack, dir
 		BlockSize: usermem.PageSize,
 		Type:      fs.SpecialFile,
 	}
-	return fs.NewInode(tm, msrc, sattr)
+	return fs.NewInode(ctx, tm, msrc, sattr)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
@@ -184,7 +184,7 @@ func newTCPSackInode(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *f
 		BlockSize: usermem.PageSize,
 		Type:      fs.SpecialFile,
 	}
-	return fs.NewInode(ts, msrc, sattr)
+	return fs.NewInode(ctx, ts, msrc, sattr)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
@@ -277,7 +277,7 @@ func (p *proc) newSysNetCore(ctx context.Context, msrc *fs.MountSource, s inet.S
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 func (p *proc) newSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource, s inet.Stack) *fs.Inode {
@@ -339,7 +339,7 @@ func (p *proc) newSysNetIPv4Dir(ctx context.Context, msrc *fs.MountSource, s ine
 	}
 
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
 
 func (p *proc) newSysNetDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
@@ -351,5 +351,5 @@ func (p *proc) newSysNetDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode
 		}
 	}
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return newProcInode(d, msrc, fs.SpecialDirectory, nil)
+	return newProcInode(ctx, d, msrc, fs.SpecialDirectory, nil)
 }
diff --git a/pkg/sentry/fs/proc/task.go b/pkg/sentry/fs/proc/task.go
index 412c0204a..b2e36aeee 100644
--- a/pkg/sentry/fs/proc/task.go
+++ b/pkg/sentry/fs/proc/task.go
@@ -101,7 +101,7 @@ func (p *proc) newTaskDir(t *kernel.Task, msrc *fs.MountSource, showSubtasks boo
 		Dir: *ramfs.NewDir(t, contents, fs.RootOwner, fs.FilePermsFromMode(0555)),
 		t:   t,
 	}
-	return newProcInode(d, msrc, fs.SpecialDirectory, t)
+	return newProcInode(t, d, msrc, fs.SpecialDirectory, t)
 }
 
 // subtasks represents a /proc/TID/task directory.
@@ -122,7 +122,7 @@ func (p *proc) newSubtasks(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		t:   t,
 		p:   p,
 	}
-	return newProcInode(s, msrc, fs.SpecialDirectory, t)
+	return newProcInode(t, s, msrc, fs.SpecialDirectory, t)
 }
 
 // UnstableAttr returns unstable attributes of the subtasks.
@@ -223,7 +223,7 @@ func (s *subtasks) Lookup(ctx context.Context, dir *fs.Inode, p string) (*fs.Dir
 	}
 
 	td := s.p.newTaskDir(task, dir.MountSource, false)
-	return fs.NewDirent(td, p), nil
+	return fs.NewDirent(ctx, td, p), nil
 }
 
 // exe is an fs.InodeOperations symlink for the /proc/PID/exe file.
@@ -240,7 +240,7 @@ func newExe(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		Symlink: *ramfs.NewSymlink(t, fs.RootOwner, ""),
 		t:       t,
 	}
-	return newProcInode(exeSymlink, msrc, fs.Symlink, t)
+	return newProcInode(t, exeSymlink, msrc, fs.Symlink, t)
 }
 
 func (e *exe) executable() (d *fs.Dirent, err error) {
@@ -308,7 +308,7 @@ func newNamespaceSymlink(t *kernel.Task, msrc *fs.MountSource, name string) *fs.
 		Symlink: *ramfs.NewSymlink(t, fs.RootOwner, target),
 		t:       t,
 	}
-	return newProcInode(n, msrc, fs.Symlink, t)
+	return newProcInode(t, n, msrc, fs.Symlink, t)
 }
 
 // Getlink implements fs.InodeOperations.Getlink.
@@ -319,7 +319,7 @@ func (n *namespaceSymlink) Getlink(ctx context.Context, inode *fs.Inode) (*fs.Di
 
 	// Create a new regular file to fake the namespace file.
 	iops := fsutil.NewNoReadWriteFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(0777), linux.PROC_SUPER_MAGIC)
-	return fs.NewDirent(newProcInode(iops, inode.MountSource, fs.RegularFile, nil), n.Symlink.Target), nil
+	return fs.NewDirent(ctx, newProcInode(ctx, iops, inode.MountSource, fs.RegularFile, nil), n.Symlink.Target), nil
 }
 
 func newNamespaceDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
@@ -329,7 +329,7 @@ func newNamespaceDir(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		"user": newNamespaceSymlink(t, msrc, "user"),
 	}
 	d := ramfs.NewDir(t, contents, fs.RootOwner, fs.FilePermsFromMode(0511))
-	return newProcInode(d, msrc, fs.SpecialDirectory, t)
+	return newProcInode(t, d, msrc, fs.SpecialDirectory, t)
 }
 
 // mapsData implements seqfile.SeqSource for /proc/[pid]/maps.
@@ -340,7 +340,7 @@ type mapsData struct {
 }
 
 func newMaps(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &mapsData{t}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &mapsData{t}), msrc, fs.SpecialFile, t)
 }
 
 func (md *mapsData) mm() *mm.MemoryManager {
@@ -380,7 +380,7 @@ type smapsData struct {
 }
 
 func newSmaps(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &smapsData{t}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &smapsData{t}), msrc, fs.SpecialFile, t)
 }
 
 func (sd *smapsData) mm() *mm.MemoryManager {
@@ -426,7 +426,7 @@ type taskStatData struct {
 }
 
 func newTaskStat(t *kernel.Task, msrc *fs.MountSource, showSubtasks bool, pidns *kernel.PIDNamespace) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &taskStatData{t, showSubtasks /* tgstats */, pidns}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &taskStatData{t, showSubtasks /* tgstats */, pidns}), msrc, fs.SpecialFile, t)
 }
 
 // NeedsUpdate returns whether the generation is old or not.
@@ -511,7 +511,7 @@ type statmData struct {
 }
 
 func newStatm(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &statmData{t}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &statmData{t}), msrc, fs.SpecialFile, t)
 }
 
 // NeedsUpdate implements seqfile.SeqSource.NeedsUpdate.
@@ -548,7 +548,7 @@ type statusData struct {
 }
 
 func newStatus(t *kernel.Task, msrc *fs.MountSource, pidns *kernel.PIDNamespace) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &statusData{t, pidns}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &statusData{t, pidns}), msrc, fs.SpecialFile, t)
 }
 
 // NeedsUpdate implements seqfile.SeqSource.NeedsUpdate.
@@ -615,7 +615,7 @@ type ioData struct {
 }
 
 func newIO(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
-	return newProcInode(seqfile.NewSeqFile(t, &ioData{t.ThreadGroup()}), msrc, fs.SpecialFile, t)
+	return newProcInode(t, seqfile.NewSeqFile(t, &ioData{t.ThreadGroup()}), msrc, fs.SpecialFile, t)
 }
 
 // NeedsUpdate returns whether the generation is old or not.
@@ -664,7 +664,7 @@ func newComm(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		SimpleFileInode: *fsutil.NewSimpleFileInode(t, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC),
 		t:               t,
 	}
-	return newProcInode(c, msrc, fs.SpecialFile, t)
+	return newProcInode(t, c, msrc, fs.SpecialFile, t)
 }
 
 // Check implements fs.InodeOperations.Check.
@@ -736,7 +736,7 @@ func newAuxvec(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 		SimpleFileInode: *fsutil.NewSimpleFileInode(t, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC),
 		t:               t,
 	}
-	return newProcInode(a, msrc, fs.SpecialFile, t)
+	return newProcInode(t, a, msrc, fs.SpecialFile, t)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
diff --git a/pkg/sentry/fs/proc/uid_gid_map.go b/pkg/sentry/fs/proc/uid_gid_map.go
index d734a48f4..eea37d15c 100644
--- a/pkg/sentry/fs/proc/uid_gid_map.go
+++ b/pkg/sentry/fs/proc/uid_gid_map.go
@@ -66,7 +66,7 @@ func newGIDMap(t *kernel.Task, msrc *fs.MountSource) *fs.Inode {
 }
 
 func newIDMap(t *kernel.Task, msrc *fs.MountSource, gids bool) *fs.Inode {
-	return newProcInode(&idMapInodeOperations{
+	return newProcInode(t, &idMapInodeOperations{
 		InodeSimpleAttributes: fsutil.NewInodeSimpleAttributes(t, fs.RootOwner, fs.FilePermsFromMode(0644), linux.PROC_SUPER_MAGIC),
 		t:                     t,
 		gids:                  gids,
diff --git a/pkg/sentry/fs/proc/uptime.go b/pkg/sentry/fs/proc/uptime.go
index 37e9ae379..4e903917a 100644
--- a/pkg/sentry/fs/proc/uptime.go
+++ b/pkg/sentry/fs/proc/uptime.go
@@ -44,7 +44,7 @@ func newUptime(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 		SimpleFileInode: *fsutil.NewSimpleFileInode(ctx, fs.RootOwner, fs.FilePermsFromMode(0444), linux.PROC_SUPER_MAGIC),
 		startTime:       ktime.NowFromContext(ctx),
 	}
-	return newProcInode(u, msrc, fs.SpecialFile, nil)
+	return newProcInode(ctx, u, msrc, fs.SpecialFile, nil)
 }
 
 // GetFile implements fs.InodeOperations.GetFile.
diff --git a/pkg/sentry/fs/ramfs/dir.go b/pkg/sentry/fs/ramfs/dir.go
index b5da36c1c..db97f400b 100644
--- a/pkg/sentry/fs/ramfs/dir.go
+++ b/pkg/sentry/fs/ramfs/dir.go
@@ -269,7 +269,7 @@ func (d *Dir) Lookup(ctx context.Context, _ *fs.Inode, p string) (*fs.Dirent, er
 	// Take a reference on the inode before returning it.  This reference
 	// is owned by the dirent we are about to create.
 	inode.IncRef()
-	return fs.NewDirent(inode, p), nil
+	return fs.NewDirent(ctx, inode, p), nil
 }
 
 // walkLocked must be called with d.mu held.
@@ -321,7 +321,7 @@ func (d *Dir) Create(ctx context.Context, dir *fs.Inode, name string, flags fs.F
 	inode.IncRef()
 
 	// Create the Dirent and corresponding file.
-	created := fs.NewDirent(inode, name)
+	created := fs.NewDirent(ctx, inode, name)
 	defer created.DecRef()
 	return created.Inode.GetFile(ctx, created, flags)
 }
@@ -382,7 +382,7 @@ func (d *Dir) Bind(ctx context.Context, dir *fs.Inode, name string, ep transport
 	}
 	// Take another ref on inode which will be donated to the new dirent.
 	inode.IncRef()
-	return fs.NewDirent(inode, name), nil
+	return fs.NewDirent(ctx, inode, name), nil
 }
 
 // CreateFifo implements fs.InodeOperations.CreateFifo.
diff --git a/pkg/sentry/fs/ramfs/tree.go b/pkg/sentry/fs/ramfs/tree.go
index 4d9deb174..702cc4a1e 100644
--- a/pkg/sentry/fs/ramfs/tree.go
+++ b/pkg/sentry/fs/ramfs/tree.go
@@ -68,7 +68,7 @@ func makeSubdir(ctx context.Context, msrc *fs.MountSource, root *Dir, subdir str
 // emptyDir returns an empty *ramfs.Dir with all permissions granted.
 func emptyDir(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 	dir := NewDir(ctx, make(map[string]*fs.Inode), fs.RootOwner, fs.FilePermsFromMode(0777))
-	return fs.NewInode(dir, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, dir, msrc, fs.StableAttr{
 		DeviceID:  anon.PseudoDevice.DeviceID(),
 		InodeID:   anon.PseudoDevice.NextIno(),
 		BlockSize: usermem.PageSize,
diff --git a/pkg/sentry/fs/ramfs/tree_test.go b/pkg/sentry/fs/ramfs/tree_test.go
index da259a971..61a7e2900 100644
--- a/pkg/sentry/fs/ramfs/tree_test.go
+++ b/pkg/sentry/fs/ramfs/tree_test.go
@@ -22,7 +22,6 @@ import (
 )
 
 func TestMakeDirectoryTree(t *testing.T) {
-	mount := fs.NewPseudoMountSource()
 
 	for _, test := range []struct {
 		name    string
@@ -54,6 +53,7 @@ func TestMakeDirectoryTree(t *testing.T) {
 		},
 	} {
 		ctx := contexttest.Context(t)
+		mount := fs.NewPseudoMountSource(ctx)
 		tree, err := MakeDirectoryTree(ctx, mount, test.subdirs)
 		if err != nil {
 			t.Errorf("%s: failed to make ramfs tree, got error %v, want nil", test.name, err)
diff --git a/pkg/sentry/fs/sys/devices.go b/pkg/sentry/fs/sys/devices.go
index a6009ba8a..4f78ca8d2 100644
--- a/pkg/sentry/fs/sys/devices.go
+++ b/pkg/sentry/fs/sys/devices.go
@@ -58,7 +58,7 @@ func newPossible(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
 			Contents: contents,
 		},
 	}
-	return newFile(c, msrc)
+	return newFile(ctx, c, msrc)
 }
 
 func newCPU(ctx context.Context, msrc *fs.MountSource) *fs.Inode {
diff --git a/pkg/sentry/fs/sys/fs.go b/pkg/sentry/fs/sys/fs.go
index 257048df5..b31c46bf9 100644
--- a/pkg/sentry/fs/sys/fs.go
+++ b/pkg/sentry/fs/sys/fs.go
@@ -61,5 +61,5 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 	// device is always ignored.
 	// sysfs ignores data, see fs/sysfs/mount.c:sysfs_mount.
 
-	return New(ctx, fs.NewNonCachingMountSource(f, flags)), nil
+	return New(ctx, fs.NewNonCachingMountSource(ctx, f, flags)), nil
 }
diff --git a/pkg/sentry/fs/sys/sys.go b/pkg/sentry/fs/sys/sys.go
index 9db41a1b8..b14bf3f55 100644
--- a/pkg/sentry/fs/sys/sys.go
+++ b/pkg/sentry/fs/sys/sys.go
@@ -22,19 +22,19 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/usermem"
 )
 
-func newFile(node fs.InodeOperations, msrc *fs.MountSource) *fs.Inode {
+func newFile(ctx context.Context, node fs.InodeOperations, msrc *fs.MountSource) *fs.Inode {
 	sattr := fs.StableAttr{
 		DeviceID:  sysfsDevice.DeviceID(),
 		InodeID:   sysfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
 		Type:      fs.SpecialFile,
 	}
-	return fs.NewInode(node, msrc, sattr)
+	return fs.NewInode(ctx, node, msrc, sattr)
 }
 
 func newDir(ctx context.Context, msrc *fs.MountSource, contents map[string]*fs.Inode) *fs.Inode {
 	d := ramfs.NewDir(ctx, contents, fs.RootOwner, fs.FilePermsFromMode(0555))
-	return fs.NewInode(d, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, d, msrc, fs.StableAttr{
 		DeviceID:  sysfsDevice.DeviceID(),
 		InodeID:   sysfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
diff --git a/pkg/sentry/fs/timerfd/timerfd.go b/pkg/sentry/fs/timerfd/timerfd.go
index 704a846a4..59403d9db 100644
--- a/pkg/sentry/fs/timerfd/timerfd.go
+++ b/pkg/sentry/fs/timerfd/timerfd.go
@@ -53,7 +53,7 @@ type TimerOperations struct {
 
 // NewFile returns a timerfd File that receives time from c.
 func NewFile(ctx context.Context, c ktime.Clock) *fs.File {
-	dirent := fs.NewDirent(anon.NewInode(ctx), "anon_inode:[timerfd]")
+	dirent := fs.NewDirent(ctx, anon.NewInode(ctx), "anon_inode:[timerfd]")
 	// Release the initial dirent reference after NewFile takes a reference.
 	defer dirent.DecRef()
 	tops := &TimerOperations{}
diff --git a/pkg/sentry/fs/tmpfs/file_test.go b/pkg/sentry/fs/tmpfs/file_test.go
index 591f20c52..0075ef023 100644
--- a/pkg/sentry/fs/tmpfs/file_test.go
+++ b/pkg/sentry/fs/tmpfs/file_test.go
@@ -26,9 +26,9 @@ import (
 )
 
 func newFileInode(ctx context.Context) *fs.Inode {
-	m := fs.NewCachingMountSource(&Filesystem{}, fs.MountSourceFlags{})
+	m := fs.NewCachingMountSource(ctx, &Filesystem{}, fs.MountSourceFlags{})
 	iops := NewInMemoryFile(ctx, usage.Tmpfs, fs.WithCurrentTime(ctx, fs.UnstableAttr{}))
-	return fs.NewInode(iops, m, fs.StableAttr{
+	return fs.NewInode(ctx, iops, m, fs.StableAttr{
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -38,7 +38,7 @@ func newFileInode(ctx context.Context) *fs.Inode {
 
 func newFile(ctx context.Context) *fs.File {
 	inode := newFileInode(ctx)
-	f, _ := inode.GetFile(ctx, fs.NewDirent(inode, "stub"), fs.FileFlags{Read: true, Write: true})
+	f, _ := inode.GetFile(ctx, fs.NewDirent(ctx, inode, "stub"), fs.FileFlags{Read: true, Write: true})
 	return f
 }
 
diff --git a/pkg/sentry/fs/tmpfs/fs.go b/pkg/sentry/fs/tmpfs/fs.go
index bfaf3cde3..a5fcdf969 100644
--- a/pkg/sentry/fs/tmpfs/fs.go
+++ b/pkg/sentry/fs/tmpfs/fs.go
@@ -136,9 +136,9 @@ func (f *Filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 	var msrc *fs.MountSource
 	switch options[cacheKey] {
 	case "", cacheAll:
-		msrc = fs.NewCachingMountSource(f, flags)
+		msrc = fs.NewCachingMountSource(ctx, f, flags)
 	case cacheRevalidate:
-		msrc = fs.NewRevalidatingMountSource(f, flags)
+		msrc = fs.NewRevalidatingMountSource(ctx, f, flags)
 	default:
 		return nil, fmt.Errorf("invalid cache policy option %q", options[cacheKey])
 	}
diff --git a/pkg/sentry/fs/tmpfs/inode_file.go b/pkg/sentry/fs/tmpfs/inode_file.go
index d20dce173..f86dfaa36 100644
--- a/pkg/sentry/fs/tmpfs/inode_file.go
+++ b/pkg/sentry/fs/tmpfs/inode_file.go
@@ -128,7 +128,7 @@ func NewMemfdInode(ctx context.Context, allowSeals bool) *fs.Inode {
 	if allowSeals {
 		iops.seals = 0
 	}
-	return fs.NewInode(iops, fs.NewNonCachingMountSource(nil, fs.MountSourceFlags{}), fs.StableAttr{
+	return fs.NewInode(ctx, iops, fs.NewNonCachingMountSource(ctx, nil, fs.MountSourceFlags{}), fs.StableAttr{
 		Type:      fs.RegularFile,
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
diff --git a/pkg/sentry/fs/tmpfs/tmpfs.go b/pkg/sentry/fs/tmpfs/tmpfs.go
index e8178c9dd..0f4497cd6 100644
--- a/pkg/sentry/fs/tmpfs/tmpfs.go
+++ b/pkg/sentry/fs/tmpfs/tmpfs.go
@@ -90,7 +90,7 @@ func NewDir(ctx context.Context, contents map[string]*fs.Inode, owner fs.FileOwn
 	// Manually set the CreateOps.
 	d.ramfsDir.CreateOps = d.newCreateOps()
 
-	return fs.NewInode(d, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, d, msrc, fs.StableAttr{
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -218,7 +218,7 @@ func (d *Dir) newCreateOps() *ramfs.CreateOps {
 				Links: 0,
 			})
 			iops := NewInMemoryFile(ctx, usage.Tmpfs, uattr)
-			return fs.NewInode(iops, dir.MountSource, fs.StableAttr{
+			return fs.NewInode(ctx, iops, dir.MountSource, fs.StableAttr{
 				DeviceID:  tmpfsDevice.DeviceID(),
 				InodeID:   tmpfsDevice.NextIno(),
 				BlockSize: usermem.PageSize,
@@ -262,7 +262,7 @@ type Symlink struct {
 // NewSymlink returns a new symlink with the provided permissions.
 func NewSymlink(ctx context.Context, target string, owner fs.FileOwner, msrc *fs.MountSource) *fs.Inode {
 	s := &Symlink{Symlink: *ramfs.NewSymlink(ctx, owner, target)}
-	return fs.NewInode(s, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, s, msrc, fs.StableAttr{
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -292,7 +292,7 @@ type Socket struct {
 // NewSocket returns a new socket with the provided permissions.
 func NewSocket(ctx context.Context, socket transport.BoundEndpoint, owner fs.FileOwner, perms fs.FilePermissions, msrc *fs.MountSource) *fs.Inode {
 	s := &Socket{Socket: *ramfs.NewSocket(ctx, socket, owner, perms)}
-	return fs.NewInode(s, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, s, msrc, fs.StableAttr{
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
@@ -329,7 +329,7 @@ func NewFifo(ctx context.Context, owner fs.FileOwner, perms fs.FilePermissions,
 	fifoIops := &Fifo{iops}
 
 	// Build a new Inode.
-	return fs.NewInode(fifoIops, msrc, fs.StableAttr{
+	return fs.NewInode(ctx, fifoIops, msrc, fs.StableAttr{
 		DeviceID:  tmpfsDevice.DeviceID(),
 		InodeID:   tmpfsDevice.NextIno(),
 		BlockSize: usermem.PageSize,
diff --git a/pkg/sentry/fs/tty/dir.go b/pkg/sentry/fs/tty/dir.go
index 679057d1f..58a26742c 100644
--- a/pkg/sentry/fs/tty/dir.go
+++ b/pkg/sentry/fs/tty/dir.go
@@ -114,7 +114,7 @@ func newDir(ctx context.Context, m *fs.MountSource) *fs.Inode {
 		InodeID: d.master.StableAttr.InodeID,
 	})
 
-	return fs.NewInode(d, m, fs.StableAttr{
+	return fs.NewInode(ctx, d, m, fs.StableAttr{
 		DeviceID: ptsDevice.DeviceID(),
 		// N.B. Linux always uses inode id 1 for the directory. See
 		// fs/devpts/inode.c:devpts_fill_super.
@@ -143,7 +143,7 @@ func (d *dirInodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name str
 	// Master?
 	if name == "ptmx" {
 		d.master.IncRef()
-		return fs.NewDirent(d.master, name), nil
+		return fs.NewDirent(ctx, d.master, name), nil
 	}
 
 	// Slave number?
@@ -159,7 +159,7 @@ func (d *dirInodeOperations) Lookup(ctx context.Context, dir *fs.Inode, name str
 	}
 
 	s.IncRef()
-	return fs.NewDirent(s, name), nil
+	return fs.NewDirent(ctx, s, name), nil
 }
 
 // Create implements fs.InodeOperations.Create.
diff --git a/pkg/sentry/fs/tty/fs.go b/pkg/sentry/fs/tty/fs.go
index 08843c115..1bbfbb90a 100644
--- a/pkg/sentry/fs/tty/fs.go
+++ b/pkg/sentry/fs/tty/fs.go
@@ -67,7 +67,7 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 		return nil, syserror.EINVAL
 	}
 
-	return newDir(ctx, fs.NewMountSource(&superOperations{}, f, flags)), nil
+	return newDir(ctx, fs.NewMountSource(ctx, &superOperations{}, f, flags)), nil
 }
 
 // superOperations implements fs.MountSourceOperations, preventing caching.
diff --git a/pkg/sentry/fs/tty/master.go b/pkg/sentry/fs/tty/master.go
index c02142ff3..54dd3d6b7 100644
--- a/pkg/sentry/fs/tty/master.go
+++ b/pkg/sentry/fs/tty/master.go
@@ -46,7 +46,7 @@ func newMasterInode(ctx context.Context, d *dirInodeOperations, owner fs.FileOwn
 		d:               d,
 	}
 
-	return fs.NewInode(iops, d.msrc, fs.StableAttr{
+	return fs.NewInode(ctx, iops, d.msrc, fs.StableAttr{
 		DeviceID: ptsDevice.DeviceID(),
 		// N.B. Linux always uses inode id 2 for ptmx. See
 		// fs/devpts/inode.c:mknod_ptmx.
diff --git a/pkg/sentry/fs/tty/slave.go b/pkg/sentry/fs/tty/slave.go
index a382dcd13..2d68978dd 100644
--- a/pkg/sentry/fs/tty/slave.go
+++ b/pkg/sentry/fs/tty/slave.go
@@ -51,7 +51,7 @@ func newSlaveInode(ctx context.Context, d *dirInodeOperations, t *Terminal, owne
 		t:               t,
 	}
 
-	return fs.NewInode(iops, d.msrc, fs.StableAttr{
+	return fs.NewInode(ctx, iops, d.msrc, fs.StableAttr{
 		DeviceID: ptsDevice.DeviceID(),
 		// N.B. Linux always uses inode id = tty index + 3. See
 		// fs/devpts/inode.c:devpts_pty_new.