ext: boilerplate code.

Renamed ext4 to ext since we are targeting ext(2/3/4).
Removed fs.go since we are targeting VFS2.
Added ext.go with filesystem struct.

PiperOrigin-RevId: 257689775

1 files changed, 0 insertions, 117 deletions

diff --git a/pkg/sentry/fs/ext4/disklayout/inode_old.go b/pkg/sentry/fs/ext4/disklayout/inode_old.go
deleted file mode 100644
index dc4c9d8e4..000000000
--- a/pkg/sentry/fs/ext4/disklayout/inode_old.go
+++ /dev/null
@@ -1,117 +0,0 @@
-// 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 disklayout
-
-import (
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/time"
-)
-
-const (
-	// oldInodeSize is the inode size in ext2/ext3.
-	oldInodeSize = 128
-)
-
-// InodeOld implements Inode interface. It emulates ext2/ext3 inode struct.
-// Inode struct size and record size are both 128 bytes for this.
-//
-// All fields representing time are in seconds since the epoch. Which means that
-// they will overflow in January 2038.
-type InodeOld struct {
-	ModeRaw uint16
-	UIDLo   uint16
-	SizeLo  uint32
-
-	// The time fields are signed integers because they could be negative to
-	// represent time before the epoch.
-	AccessTimeRaw       int32
-	ChangeTimeRaw       int32
-	ModificationTimeRaw int32
-	DeletionTimeRaw     int32
-
-	GIDLo         uint16
-	LinksCountRaw uint16
-	BlocksCountLo uint32
-	FlagsRaw      uint32
-	VersionLo     uint32 // This is OS dependent.
-	BlocksRaw     [60]byte
-	Generation    uint32
-	FileACLLo     uint32
-	SizeHi        uint32
-	ObsoFaddr     uint32
-
-	// OS dependent fields have been inlined here.
-	BlocksCountHi uint16
-	FileACLHi     uint16
-	UIDHi         uint16
-	GIDHi         uint16
-	ChecksumLo    uint16
-	_             uint16
-}
-
-// Compiles only if InodeOld implements Inode.
-var _ Inode = (*InodeOld)(nil)
-
-// Mode implements Inode.Mode.
-func (in *InodeOld) Mode() linux.FileMode { return linux.FileMode(in.ModeRaw) }
-
-// UID implements Inode.UID.
-func (in *InodeOld) UID() auth.KUID {
-	return auth.KUID((uint32(in.UIDHi) << 16) | uint32(in.UIDLo))
-}
-
-// GID implements Inode.GID.
-func (in *InodeOld) GID() auth.KGID {
-	return auth.KGID((uint32(in.GIDHi) << 16) | uint32(in.GIDLo))
-}
-
-// Size implements Inode.Size.
-func (in *InodeOld) Size() uint64 {
-	// In ext2/ext3, in.SizeHi did not exist, it was instead named in.DirACL.
-	return uint64(in.SizeLo)
-}
-
-// InodeSize implements Inode.InodeSize.
-func (in *InodeOld) InodeSize() uint16 { return oldInodeSize }
-
-// AccessTime implements Inode.AccessTime.
-func (in *InodeOld) AccessTime() time.Time {
-	return time.FromUnix(int64(in.AccessTimeRaw), 0)
-}
-
-// ChangeTime implements Inode.ChangeTime.
-func (in *InodeOld) ChangeTime() time.Time {
-	return time.FromUnix(int64(in.ChangeTimeRaw), 0)
-}
-
-// ModificationTime implements Inode.ModificationTime.
-func (in *InodeOld) ModificationTime() time.Time {
-	return time.FromUnix(int64(in.ModificationTimeRaw), 0)
-}
-
-// DeletionTime implements Inode.DeletionTime.
-func (in *InodeOld) DeletionTime() time.Time {
-	return time.FromUnix(int64(in.DeletionTimeRaw), 0)
-}
-
-// LinksCount implements Inode.LinksCount.
-func (in *InodeOld) LinksCount() uint16 { return in.LinksCountRaw }
-
-// Flags implements Inode.Flags.
-func (in *InodeOld) Flags() InodeFlags { return InodeFlagsFromInt(in.FlagsRaw) }
-
-// Blocks implements Inode.Blocks.
-func (in *InodeOld) Blocks() [60]byte { return in.BlocksRaw }