stateify: convert all packages to use explicit mode.

PiperOrigin-RevId: 207007153
Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9

9 files changed, 37 insertions, 27 deletions

diff --git a/pkg/sentry/fs/tty/BUILD b/pkg/sentry/fs/tty/BUILD
index 363897b2c..3c446eef4 100644
--- a/pkg/sentry/fs/tty/BUILD
+++ b/pkg/sentry/fs/tty/BUILD
@@ -1,22 +1,6 @@
 package(licenses = ["notice"])  # Apache 2.0
 
-load("//tools/go_stateify:defs.bzl", "go_library", "go_stateify", "go_test")
-
-go_stateify(
-    name = "tty_state",
-    srcs = [
-        "dir.go",
-        "fs.go",
-        "inode.go",
-        "line_discipline.go",
-        "master.go",
-        "queue.go",
-        "slave.go",
-        "terminal.go",
-    ],
-    out = "tty_state.go",
-    package = "tty",
-)
+load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
 
 go_library(
     name = "tty",
@@ -29,7 +13,6 @@ go_library(
         "queue.go",
         "slave.go",
         "terminal.go",
-        "tty_state.go",
     ],
     importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/tty",
     visibility = ["//pkg/sentry:internal"],
@@ -44,7 +27,6 @@ go_library(
         "//pkg/sentry/kernel/auth",
         "//pkg/sentry/kernel/time",
         "//pkg/sentry/usermem",
-        "//pkg/state",
         "//pkg/syserror",
         "//pkg/tcpip/transport/unix",
         "//pkg/waiter",
diff --git a/pkg/sentry/fs/tty/dir.go b/pkg/sentry/fs/tty/dir.go
index 2c5b2aed6..c91091db4 100644
--- a/pkg/sentry/fs/tty/dir.go
+++ b/pkg/sentry/fs/tty/dir.go
@@ -49,14 +49,16 @@ import (
 // corresponding Dirents hold on their parent (this directory).
 //
 // dirInodeOperations implements fs.InodeOperations.
+//
+// +stateify savable
 type dirInodeOperations struct {
-	fsutil.DeprecatedFileOperations
-	fsutil.InodeNotSocket
-	fsutil.InodeNotRenameable
-	fsutil.InodeNotSymlink
-	fsutil.InodeNoExtendedAttributes
-	fsutil.NoMappable
-	fsutil.NoopWriteOut
+	fsutil.DeprecatedFileOperations  `state:"nosave"`
+	fsutil.InodeNotSocket            `state:"nosave"`
+	fsutil.InodeNotRenameable        `state:"nosave"`
+	fsutil.InodeNotSymlink           `state:"nosave"`
+	fsutil.InodeNoExtendedAttributes `state:"nosave"`
+	fsutil.NoMappable                `state:"nosave"`
+	fsutil.NoopWriteOut              `state:"nosave"`
 
 	// msrc is the super block this directory is on.
 	//
@@ -348,6 +350,8 @@ func (d *dirInodeOperations) masterClose(t *Terminal) {
 //
 // This is nearly identical to fsutil.DirFileOperations, except that it takes
 // df.di.mu in IterateDir.
+//
+// +stateify savable
 type dirFileOperations struct {
 	waiter.AlwaysReady `state:"nosave"`
 	fsutil.NoopRelease `state:"nosave"`
diff --git a/pkg/sentry/fs/tty/fs.go b/pkg/sentry/fs/tty/fs.go
index dbaffe95e..e28635607 100644
--- a/pkg/sentry/fs/tty/fs.go
+++ b/pkg/sentry/fs/tty/fs.go
@@ -28,6 +28,8 @@ var ptsDevice = device.NewAnonDevice()
 //
 // This devpts is always in the new "multi-instance" mode. i.e., it contains a
 // ptmx device tied to this mount.
+//
+// +stateify savable
 type filesystem struct{}
 
 func init() {
@@ -69,6 +71,8 @@ func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSou
 }
 
 // superOperations implements fs.MountSourceOperations, preventing caching.
+//
+// +stateify savable
 type superOperations struct{}
 
 // Revalidate implements fs.DirentOperations.Revalidate.
diff --git a/pkg/sentry/fs/tty/inode.go b/pkg/sentry/fs/tty/inode.go
index 04b9a7727..c0fa2b407 100644
--- a/pkg/sentry/fs/tty/inode.go
+++ b/pkg/sentry/fs/tty/inode.go
@@ -31,6 +31,8 @@ import (
 //
 // * fs.InodeOperations.Release
 // * fs.InodeOperations.GetFile
+//
+// +stateify savable
 type inodeOperations struct {
 	fsutil.DeprecatedFileOperations  `state:"nosave"`
 	fsutil.InodeNoExtendedAttributes `state:"nosave"`
diff --git a/pkg/sentry/fs/tty/line_discipline.go b/pkg/sentry/fs/tty/line_discipline.go
index f094635f5..d243ee40e 100644
--- a/pkg/sentry/fs/tty/line_discipline.go
+++ b/pkg/sentry/fs/tty/line_discipline.go
@@ -72,6 +72,8 @@ const (
 //  termiosMu
 //    inQueue.mu
 //      outQueue.mu
+//
+// +stateify savable
 type lineDiscipline struct {
 	// inQueue is the input queue of the terminal.
 	inQueue queue
@@ -183,6 +185,8 @@ type transformer interface {
 
 // outputQueueTransformer implements transformer. It performs line discipline
 // transformations on the output queue.
+//
+// +stateify savable
 type outputQueueTransformer struct{}
 
 // transform does output processing for one end of the pty. See
@@ -254,6 +258,8 @@ func (*outputQueueTransformer) transform(l *lineDiscipline, q *queue, buf []byte
 
 // inputQueueTransformer implements transformer. It performs line discipline
 // transformations on the input queue.
+//
+// +stateify savable
 type inputQueueTransformer struct{}
 
 // transform does input processing for one end of the pty. Characters read are
diff --git a/pkg/sentry/fs/tty/master.go b/pkg/sentry/fs/tty/master.go
index 74cdbe874..c7198e218 100644
--- a/pkg/sentry/fs/tty/master.go
+++ b/pkg/sentry/fs/tty/master.go
@@ -27,6 +27,8 @@ import (
 
 // masterInodeOperations are the fs.InodeOperations for the master end of the
 // Terminal (ptmx file).
+//
+// +stateify savable
 type masterInodeOperations struct {
 	inodeOperations
 
@@ -96,6 +98,8 @@ func (mi *masterInodeOperations) GetFile(ctx context.Context, d *fs.Dirent, flag
 }
 
 // masterFileOperations are the fs.FileOperations for the master end of a terminal.
+//
+// +stateify savable
 type masterFileOperations struct {
 	fsutil.PipeSeek      `state:"nosave"`
 	fsutil.NotDirReaddir `state:"nosave"`
diff --git a/pkg/sentry/fs/tty/queue.go b/pkg/sentry/fs/tty/queue.go
index 026d5e077..42c105abc 100644
--- a/pkg/sentry/fs/tty/queue.go
+++ b/pkg/sentry/fs/tty/queue.go
@@ -32,11 +32,13 @@ import (
 // processed (i.e. undergo termios transformations) as they are added to the
 // read buffer. The read buffer is readable when its length is nonzero and
 // readable is true.
+//
+// +stateify savable
 type queue struct {
 	// mu protects everything in queue.
 	mu sync.Mutex `state:"nosave"`
 
-	waiter.Queue `state:"nosave"`
+	waiter.Queue `state:"zerovalue"`
 
 	// readBuf is buffer of data ready to be read when readable is true.
 	// This data has been processed.
diff --git a/pkg/sentry/fs/tty/slave.go b/pkg/sentry/fs/tty/slave.go
index f5eec726e..1c562b172 100644
--- a/pkg/sentry/fs/tty/slave.go
+++ b/pkg/sentry/fs/tty/slave.go
@@ -27,6 +27,8 @@ import (
 
 // slaveInodeOperations are the fs.InodeOperations for the slave end of the
 // Terminal (pts file).
+//
+// +stateify savable
 type slaveInodeOperations struct {
 	inodeOperations
 
@@ -86,6 +88,8 @@ func (si *slaveInodeOperations) GetFile(ctx context.Context, d *fs.Dirent, flags
 }
 
 // slaveFileOperations are the fs.FileOperations for the slave end of a terminal.
+//
+// +stateify savable
 type slaveFileOperations struct {
 	fsutil.PipeSeek      `state:"nosave"`
 	fsutil.NotDirReaddir `state:"nosave"`
diff --git a/pkg/sentry/fs/tty/terminal.go b/pkg/sentry/fs/tty/terminal.go
index fa5b00409..3cb135124 100644
--- a/pkg/sentry/fs/tty/terminal.go
+++ b/pkg/sentry/fs/tty/terminal.go
@@ -21,6 +21,8 @@ import (
 )
 
 // Terminal is a pseudoterminal.
+//
+// +stateify savable
 type Terminal struct {
 	refs.AtomicRefCount