5 files changed, 12 insertions, 8 deletions
diff --git a/pkg/sentry/fsimpl/fuse/BUILD b/pkg/sentry/fsimpl/fuse/BUILD
index 41567967d..3e00c2abb 100644
--- a/pkg/sentry/fsimpl/fuse/BUILD
+++ b/pkg/sentry/fsimpl/fuse/BUILD
@@ -12,6 +12,7 @@ go_library(
         "//pkg/abi/linux",
         "//pkg/context",
         "//pkg/sentry/fsimpl/devtmpfs",
+        "//pkg/sentry/kernel",
         "//pkg/sentry/vfs",
         "//pkg/syserror",
         "//pkg/usermem",
diff --git a/pkg/sentry/fsimpl/fuse/dev.go b/pkg/sentry/fsimpl/fuse/dev.go
index f6a67d005..dc33268af 100644
--- a/pkg/sentry/fsimpl/fuse/dev.go
+++ b/pkg/sentry/fsimpl/fuse/dev.go
@@ -18,6 +18,7 @@ import (
 	"gvisor.dev/gvisor/pkg/abi/linux"
 	"gvisor.dev/gvisor/pkg/context"
 	"gvisor.dev/gvisor/pkg/sentry/fsimpl/devtmpfs"
+	"gvisor.dev/gvisor/pkg/sentry/kernel"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/syserror"
 	"gvisor.dev/gvisor/pkg/usermem"
@@ -30,6 +31,10 @@ type fuseDevice struct{}
 
 // Open implements vfs.Device.Open.
 func (fuseDevice) Open(ctx context.Context, mnt *vfs.Mount, vfsd *vfs.Dentry, opts vfs.OpenOptions) (*vfs.FileDescription, error) {
+	if !kernel.FUSEEnabled {
+		return nil, syserror.ENOENT
+	}
+
 	var fd DeviceFD
 	if err := fd.vfsfd.Init(&fd, opts.Flags, mnt, vfsd, &vfs.FileDescriptionOptions{
 		UseDentryMetadata: true,
diff --git a/pkg/sentry/fsimpl/gofer/special_file.go b/pkg/sentry/fsimpl/gofer/special_file.go
index c1e6b13e5..a7b53b2d2 100644
--- a/pkg/sentry/fsimpl/gofer/special_file.go
+++ b/pkg/sentry/fsimpl/gofer/special_file.go
@@ -28,9 +28,9 @@ import (
 )
 
 // specialFileFD implements vfs.FileDescriptionImpl for pipes, sockets, device
-// special files, and (when filesystemOptions.specialRegularFiles is in effect)
-// regular files. specialFileFD differs from regularFileFD by using per-FD
-// handles instead of shared per-dentry handles, and never buffering I/O.
+// special files, and (when filesystemOptions.regularFilesUseSpecialFileFD is
+// in effect) regular files. specialFileFD differs from regularFileFD by using
+// per-FD handles instead of shared per-dentry handles, and never buffering I/O.
 type specialFileFD struct {
 	fileDescription
 
diff --git a/pkg/sentry/fsimpl/host/BUILD b/pkg/sentry/fsimpl/host/BUILD
index 44a09d87a..e86fbe2d5 100644
--- a/pkg/sentry/fsimpl/host/BUILD
+++ b/pkg/sentry/fsimpl/host/BUILD
@@ -22,6 +22,7 @@ go_library(
         "//pkg/context",
         "//pkg/fdnotifier",
         "//pkg/fspath",
+        "//pkg/iovec",
         "//pkg/log",
         "//pkg/refs",
         "//pkg/safemem",
diff --git a/pkg/sentry/fsimpl/host/socket_iovec.go b/pkg/sentry/fsimpl/host/socket_iovec.go
index 584c247d2..fc0d5fd38 100644
--- a/pkg/sentry/fsimpl/host/socket_iovec.go
+++ b/pkg/sentry/fsimpl/host/socket_iovec.go
@@ -17,13 +17,10 @@ package host
 import (
 	"syscall"
 
-	"gvisor.dev/gvisor/pkg/abi/linux"
+	"gvisor.dev/gvisor/pkg/iovec"
 	"gvisor.dev/gvisor/pkg/syserror"
 )
 
-// maxIovs is the maximum number of iovecs to pass to the host.
-var maxIovs = linux.UIO_MAXIOV
-
 // copyToMulti copies as many bytes from src to dst as possible.
 func copyToMulti(dst [][]byte, src []byte) {
 	for _, d := range dst {
@@ -74,7 +71,7 @@ func buildIovec(bufs [][]byte, maxlen int64, truncate bool) (length int64, iovec
 		}
 	}
 
-	if iovsRequired > maxIovs {
+	if iovsRequired > iovec.MaxIovs {
 		// The kernel will reject our call if we pass this many iovs.
 		// Use a single intermediate buffer instead.
 		b := make([]byte, stopLen)