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// Copyright (C) 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/fmtutil"
)
type QGroupLimitFlags uint64
const (
QGroupLimitFlagMaxRfer = 1 << iota
QGroupLimitFlagMaxExcl
QGroupLimitFlagRsvRfer
QGroupLimitFlagRsvExcl
QGroupLimitFlagRferCmpr
QGroupLimitFlagExclCmpr
)
var qgroupLimitFlagNames = []string{
"MAX_RFER",
"MAX_EXCL",
"RSV_RFER",
"RSV_EXCL",
"RFER_CMPR",
"EXCL_CMPR",
}
func (f QGroupLimitFlags) Has(req QGroupLimitFlags) bool { return f&req == req }
func (f QGroupLimitFlags) String() string {
return fmtutil.BitfieldString(f, qgroupLimitFlagNames, fmtutil.HexNone)
}
// QGroupLimit configures the maximum permissible amount of space that
// a given qgroup can consume (tracked in a QGroupInfo item) on the
// containing subvolume.
//
// Key:
//
// key.objectid = 0
// key.offset = ID of the qgroup
type QGroupLimit struct { // trivial QGROUP_LIMIT=244
Flags QGroupLimitFlags `bin:"off=0, siz=8"`
MaxReferenced uint64 `bin:"off=8, siz=8"`
MaxExclusive uint64 `bin:"off=16, siz=8"`
RsvReferenced uint64 `bin:"off=24, siz=8"`
RsvExclusive uint64 `bin:"off=32, siz=8"`
binstruct.End `bin:"off=40"`
}
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