diff options
Diffstat (limited to 'pkg')
-rw-r--r-- | pkg/sentry/fs/ext4/BUILD | 14 | ||||
-rw-r--r-- | pkg/sentry/fs/ext4/fs.go | 61 |
2 files changed, 75 insertions, 0 deletions
diff --git a/pkg/sentry/fs/ext4/BUILD b/pkg/sentry/fs/ext4/BUILD new file mode 100644 index 000000000..9df9084c3 --- /dev/null +++ b/pkg/sentry/fs/ext4/BUILD @@ -0,0 +1,14 @@ +package(licenses = ["notice"]) + +load("//tools/go_stateify:defs.bzl", "go_library") + +go_library( + name = "ext4", + srcs = ["fs.go"], + importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/fs/ext4", + visibility = ["//pkg/sentry:internal"], + deps = [ + "//pkg/sentry/context", + "//pkg/sentry/fs", + ], +) diff --git a/pkg/sentry/fs/ext4/fs.go b/pkg/sentry/fs/ext4/fs.go new file mode 100644 index 000000000..de5f0ef63 --- /dev/null +++ b/pkg/sentry/fs/ext4/fs.go @@ -0,0 +1,61 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package ext4 implements the ext4 filesystem. +package ext4 + +import ( + "gvisor.googlesource.com/gvisor/pkg/sentry/context" + "gvisor.googlesource.com/gvisor/pkg/sentry/fs" +) + +// filesystem implements fs.Filesystem for ext4. +// +// +stateify savable +type filesystem struct{} + +func init() { + fs.RegisterFilesystem(&filesystem{}) +} + +// FilesystemName is the name under which the filesystem is registered. +// Name matches fs/ext4/super.c:ext4_fs_type.name. +const FilesystemName = "ext4" + +// Name is the name of the file system. +func (*filesystem) Name() string { + return FilesystemName +} + +// AllowUserMount prohibits users from using mount(2) with this file system. +func (*filesystem) AllowUserMount() bool { + return false +} + +// AllowUserList prohibits this filesystem to be listed in /proc/filesystems. +func (*filesystem) AllowUserList() bool { + return false +} + +// Flags returns properties of the filesystem. +// +// In Linux, ext4 returns FS_REQUIRES_DEV. See fs/ext4/super.c +func (*filesystem) Flags() fs.FilesystemFlags { + return fs.FilesystemRequiresDev +} + +// Mount returns the root inode of the ext4 fs. +func (f *filesystem) Mount(ctx context.Context, device string, flags fs.MountSourceFlags, data string, cgroupsInt interface{}) (*fs.Inode, error) { + panic("unimplemented") +} |