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124 lines
3.7 KiB
Go
124 lines
3.7 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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Copyright 2013-2018 Docker, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Original source: https://github.com/moby/moby/blob/v26.0.0/daemon/graphdriver/driver_linux.go
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package fs
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import (
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"path/filepath"
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"syscall"
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)
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// Magic unsigned id of the filesystem in use.
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type Magic uint32
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const (
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// MagicUnsupported is a predefined constant value other than a valid filesystem id.
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MagicUnsupported = Magic(0x00000000)
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)
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const (
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// MagicAufs filesystem id for Aufs
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MagicAufs = Magic(0x61756673)
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// MagicBtrfs filesystem id for Btrfs
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MagicBtrfs = Magic(0x9123683E)
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// MagicCramfs filesystem id for Cramfs
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MagicCramfs = Magic(0x28cd3d45)
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// MagicEcryptfs filesystem id for eCryptfs
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MagicEcryptfs = Magic(0xf15f)
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// MagicExtfs filesystem id for Extfs
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MagicExtfs = Magic(0x0000EF53)
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// MagicF2fs filesystem id for F2fs
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MagicF2fs = Magic(0xF2F52010)
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// MagicGPFS filesystem id for GPFS
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MagicGPFS = Magic(0x47504653)
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// MagicJffs2Fs filesystem if for Jffs2Fs
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MagicJffs2Fs = Magic(0x000072b6)
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// MagicJfs filesystem id for Jfs
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MagicJfs = Magic(0x3153464a)
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// MagicNfsFs filesystem id for NfsFs
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MagicNfsFs = Magic(0x00006969)
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// MagicRAMFs filesystem id for RamFs
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MagicRAMFs = Magic(0x858458f6)
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// MagicReiserFs filesystem id for ReiserFs
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MagicReiserFs = Magic(0x52654973)
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// MagicSmbFs filesystem id for SmbFs
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MagicSmbFs = Magic(0x0000517B)
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// MagicSquashFs filesystem id for SquashFs
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MagicSquashFs = Magic(0x73717368)
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// MagicTmpFs filesystem id for TmpFs
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MagicTmpFs = Magic(0x01021994)
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// MagicVxFS filesystem id for VxFs
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MagicVxFS = Magic(0xa501fcf5)
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// MagicXfs filesystem id for Xfs
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MagicXfs = Magic(0x58465342)
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// MagicZfs filesystem id for Zfs
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MagicZfs = Magic(0x2fc12fc1)
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// MagicOverlay filesystem id for overlay
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MagicOverlay = Magic(0x794C7630)
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)
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var (
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// FsNames maps filesystem id to name of the filesystem.
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FsNames = map[Magic]string{
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MagicAufs: "aufs",
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MagicBtrfs: "btrfs",
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MagicCramfs: "cramfs",
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MagicExtfs: "extfs",
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MagicF2fs: "f2fs",
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MagicGPFS: "gpfs",
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MagicJffs2Fs: "jffs2",
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MagicJfs: "jfs",
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MagicNfsFs: "nfs",
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MagicOverlay: "overlayfs",
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MagicRAMFs: "ramfs",
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MagicReiserFs: "reiserfs",
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MagicSmbFs: "smb",
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MagicSquashFs: "squashfs",
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MagicTmpFs: "tmpfs",
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MagicUnsupported: "unsupported",
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MagicVxFS: "vxfs",
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MagicXfs: "xfs",
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MagicZfs: "zfs",
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}
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)
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// GetMagic returns the filesystem id given the path.
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func GetMagic(rootpath string) (Magic, error) {
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var buf syscall.Statfs_t
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if err := syscall.Statfs(filepath.Dir(rootpath), &buf); err != nil {
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return 0, err
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}
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return Magic(buf.Type), nil
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}
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