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// Copyright 2019 The Prometheus 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 btrfs provides access to statistics exposed by Btrfs filesystems.
package btrfs
// Stats contains statistics for a single Btrfs filesystem.
// See Linux fs/btrfs/sysfs.c for more information.
type Stats struct {
UUID, Label string
Allocation Allocation
Devices map[string]*Device
Features []string
CloneAlignment uint64
NodeSize uint64
QuotaOverride uint64
SectorSize uint64
CommitStats CommitStats
}
// Allocation contains allocation statistics for data, metadata and system data.
type Allocation struct {
GlobalRsvReserved, GlobalRsvSize uint64
Data, Metadata, System *AllocationStats
}
// AllocationStats contains allocation statistics for a data type.
type AllocationStats struct {
// Usage statistics
DiskUsedBytes uint64
DiskTotalBytes uint64
MayUseBytes uint64
PinnedBytes uint64
TotalPinnedBytes uint64
ReadOnlyBytes uint64
ReservedBytes uint64
UsedBytes uint64
TotalBytes uint64
// Flags marking filesystem state
// See Linux fs/btrfs/ctree.h for more information.
Flags uint64
// Additional disk usage statistics depending on the disk layout.
// At least one of these will exist and not be nil.
Layouts map[string]*LayoutUsage
}
// LayoutUsage contains additional usage statistics for a disk layout.
type LayoutUsage struct {
UsedBytes, TotalBytes uint64
Ratio float64
}
// Device contains information about a device that is part of a Btrfs filesystem.
type Device struct {
Size uint64
}
// Number of commits and various time related statistics.
// See Linux fs/btrfs/sysfs.c with 6.x version.
type CommitStats struct {
Commits uint64
LastCommitMs uint64
MaxCommitMs uint64
TotalCommitMs uint64
}