3 files changed, 12 insertions, 0 deletions
diff --git a/pkg/sentry/fsimpl/tmpfs/BUILD b/pkg/sentry/fsimpl/tmpfs/BUILD
index fe520b6fd..09957c2b7 100644
--- a/pkg/sentry/fsimpl/tmpfs/BUILD
+++ b/pkg/sentry/fsimpl/tmpfs/BUILD
@@ -67,6 +67,7 @@ go_library(
         "//pkg/sentry/fs",
         "//pkg/sentry/fs/fsutil",
         "//pkg/sentry/fs/lock",
+        "//pkg/sentry/fsmetric",
         "//pkg/sentry/kernel/auth",
         "//pkg/sentry/kernel/pipe",
         "//pkg/sentry/kernel/time",
diff --git a/pkg/sentry/fsimpl/tmpfs/filesystem.go b/pkg/sentry/fsimpl/tmpfs/filesystem.go
index 61138a7a4..9296db2fb 100644
--- a/pkg/sentry/fsimpl/tmpfs/filesystem.go
+++ b/pkg/sentry/fsimpl/tmpfs/filesystem.go
@@ -21,6 +21,7 @@ import (
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
 	"gvisor.dev/gvisor/pkg/fspath"
+	"gvisor.dev/gvisor/pkg/sentry/fsmetric"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/socket/unix/transport"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
@@ -439,6 +440,11 @@ func (d *dentry) open(ctx context.Context, rp *vfs.ResolvingPath, opts *vfs.Open
 				return nil, err
 			}
 		}
+		if fd.vfsfd.IsWritable() {
+			fsmetric.TmpfsOpensW.Increment()
+		} else if fd.vfsfd.IsReadable() {
+			fsmetric.TmpfsOpensRO.Increment()
+		}
 		return &fd.vfsfd, nil
 	case *directory:
 		// Can't open directories writably.
diff --git a/pkg/sentry/fsimpl/tmpfs/regular_file.go b/pkg/sentry/fsimpl/tmpfs/regular_file.go
index f8e0cffb0..6255a7c84 100644
--- a/pkg/sentry/fsimpl/tmpfs/regular_file.go
+++ b/pkg/sentry/fsimpl/tmpfs/regular_file.go
@@ -25,6 +25,7 @@ import (
 	"gvisor.dev/gvisor/pkg/safemem"
 	"gvisor.dev/gvisor/pkg/sentry/fs"
 	"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
+	"gvisor.dev/gvisor/pkg/sentry/fsmetric"
 	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
 	"gvisor.dev/gvisor/pkg/sentry/memmap"
 	"gvisor.dev/gvisor/pkg/sentry/pgalloc"
@@ -359,6 +360,10 @@ func (fd *regularFileFD) Allocate(ctx context.Context, mode, offset, length uint
 
 // PRead implements vfs.FileDescriptionImpl.PRead.
 func (fd *regularFileFD) PRead(ctx context.Context, dst usermem.IOSequence, offset int64, opts vfs.ReadOptions) (int64, error) {
+	start := fsmetric.StartReadWait()
+	defer fsmetric.FinishReadWait(fsmetric.TmpfsReadWait, start)
+	fsmetric.TmpfsReads.Increment()
+
 	if offset < 0 {
 		return 0, syserror.EINVAL
 	}