mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-08 14:37:55 +08:00
91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
// Copyright 2019 Yunion
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package btrfsutils
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import (
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"path/filepath"
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"strings"
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"yunion.io/x/log"
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"yunion.io/x/pkg/errors"
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"yunion.io/x/onecloud/pkg/util/procutils"
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)
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/*
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ID 256 gen 32 top level 5 path @
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ID 257 gen 2426 top level 256 path @/var
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ID 258 gen 870 top level 256 path @/usr/local
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ID 259 gen 2426 top level 256 path @/tmp
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ID 260 gen 35 top level 256 path @/srv
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ID 261 gen 2426 top level 256 path @/root
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ID 262 gen 874 top level 256 path @/opt
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ID 263 gen 35 top level 256 path @/home
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ID 264 gen 26 top level 256 path @/boot/grub2/x86_64-efi
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ID 265 gen 64 top level 256 path @/boot/grub2/i386-pc
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ID 266 gen 881 top level 256 path @/.snapshots
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ID 267 gen 2426 top level 266 path @/.snapshots/1/snapshot
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ID 272 gen 65 top level 266 path @/.snapshots/2/snapshot
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*/
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func parseBtrfsSubvols(lines string) []string {
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log.Debugf("parseBtrfsSubvols %s", lines)
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var ret []string
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for _, l := range strings.Split(lines, "\n") {
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parts := strings.Split(l, " ")
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if len(parts) >= 9 && strings.HasPrefix(parts[8], "@/") {
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ret = append(ret, strings.TrimSpace(parts[8]))
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}
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}
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return ret
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}
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func MountSubvols(dev string, mnt string) error {
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output, err := procutils.NewCommand("btrfs", "subvolume", "list", mnt).Output()
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if err != nil {
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return errors.Wrap(err, "btrfs subvolume list")
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}
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subvols := parseBtrfsSubvols(string(output))
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log.Debugf("mount btrfs subvols %s", strings.Join(subvols, ","))
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for _, subvol := range subvols {
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err := procutils.NewCommand("mount", dev, filepath.Join(mnt, subvol[2:]), "-o", "subvol=/"+subvol).Run()
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if err != nil {
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return errors.Wrapf(err, "btrfs mount subvolume %s", subvol)
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}
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}
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return nil
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}
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func UnmountSubvols(mnt string) error {
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output, err := procutils.NewCommand("btrfs", "subvolume", "list", mnt).Output()
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if err != nil {
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return errors.Wrap(err, "btrfs subvolume list")
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}
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subvols := parseBtrfsSubvols(string(output))
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log.Debugf("unmount btrfs subvols %s", strings.Join(subvols, ","))
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// scan in reverse order
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var errs []error
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for i := len(subvols) - 1; i >= 0; i-- {
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subvol := subvols[i]
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err := procutils.NewCommand("umount", filepath.Join(mnt, subvol[2:])).Run()
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if err != nil {
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errs = append(errs, errors.Wrapf(err, "btrfs unmount subvolume %s", subvol))
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}
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}
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if len(errs) > 0 {
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return errors.NewAggregate(errs)
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}
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return nil
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}
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