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// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package btrfsitem
import (
"git.lukeshu.com/btrfs-progs-ng/lib/binstruct"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsprim"
"git.lukeshu.com/btrfs-progs-ng/lib/fmtutil"
)
// Inode is a file/dir/whatever in the filesystem.
//
// key.objectid = inode number
// key.offset = 0
type Inode struct { // trivial INODE_ITEM=1
Generation btrfsprim.Generation `bin:"off=0x00, siz=0x08"`
TransID int64 `bin:"off=0x08, siz=0x08"`
Size int64 `bin:"off=0x10, siz=0x08"` // stat
NumBytes int64 `bin:"off=0x18, siz=0x08"` // allocated bytes, may be larger than size (or smaller if there are holes?)
BlockGroup btrfsprim.ObjID `bin:"off=0x20, siz=0x08"` // only used for freespace inodes
NLink int32 `bin:"off=0x28, siz=0x04"` // stat
UID int32 `bin:"off=0x2C, siz=0x04"` // stat
GID int32 `bin:"off=0x30, siz=0x04"` // stat
Mode StatMode `bin:"off=0x34, siz=0x04"` // stat
RDev int64 `bin:"off=0x38, siz=0x08"` // stat
Flags InodeFlags `bin:"off=0x40, siz=0x08"` // statx.stx_attributes, sorta
Sequence int64 `bin:"off=0x48, siz=0x08"` // NFS
Reserved [4]int64 `bin:"off=0x50, siz=0x20"`
ATime btrfsprim.Time `bin:"off=0x70, siz=0x0c"` // stat
CTime btrfsprim.Time `bin:"off=0x7c, siz=0x0c"` // stat
MTime btrfsprim.Time `bin:"off=0x88, siz=0x0c"` // stat
OTime btrfsprim.Time `bin:"off=0x94, siz=0x0c"` // statx.stx_btime (why is this called "otime" instead of "btime"?)
binstruct.End `bin:"off=0xa0"`
}
type InodeFlags uint64
const (
INODE_NODATASUM InodeFlags = 1 << iota
INODE_NODATACOW
INODE_READONLY
INODE_NOCOMPRESS
INODE_PREALLOC
INODE_SYNC
INODE_IMMUTABLE
INODE_APPEND
INODE_NODUMP
INODE_NOATIME
INODE_DIRSYNC
INODE_COMPRESS
)
var inodeFlagNames = []string{
"NODATASUM",
"NODATACOW",
"READONLY",
"NOCOMPRESS",
"PREALLOC",
"SYNC",
"IMMUTABLE",
"APPEND",
"NODUMP",
"NOATIME",
"DIRSYNC",
"COMPRESS",
}
func (f InodeFlags) Has(req InodeFlags) bool { return f&req == req }
func (f InodeFlags) String() string {
return fmtutil.BitfieldString(f, inodeFlagNames, fmtutil.HexLower)
}
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