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treewalk.go
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treewalk.go
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// Copyright (c) 2015-2021, NVIDIA CORPORATION.
// SPDX-License-Identifier: Apache-2.0
package fs
import (
"encoding/binary"
"fmt"
"io"
"io/ioutil"
"os"
"regexp"
"strconv"
"sync"
"time"
"github.com/swiftstack/sortedmap"
"github.com/swiftstack/ProxyFS/blunder"
"github.com/swiftstack/ProxyFS/dlm"
"github.com/swiftstack/ProxyFS/headhunter"
"github.com/swiftstack/ProxyFS/inode"
"github.com/swiftstack/ProxyFS/logger"
"github.com/swiftstack/ProxyFS/swiftclient"
)
const (
jobBPTreeMaxKeysPerNode = uint64(100)
jobBPTreeEvictLowLimit = uint64(90)
jobBPTreeEvictHighLimit = uint64(100)
validateVolumeInodeParallelism = uint64(100)
validateVolumeCalculateLinkCountParallelism = uint64(50)
validateVolumeFixLinkCountParallelism = uint64(50)
validateVolumeIncrementByteCountsParallelism = uint64(100)
scrubVolumeInodeParallelism = uint64(100)
invalidLinkCount = uint64(0xFFFFFFFFFFFFFFFF) // Indicates Inode to be removed
lostAndFoundDirName = ".Lost+Found"
)
type jobStruct struct {
sync.Mutex
globalWaitGroup sync.WaitGroup
jobType string
volumeName string
active bool
stopFlag bool
err []string
info []string
volume *volumeStruct
bpTreeCache sortedmap.BPlusTreeCache
bpTreeFile *os.File
bpTreeFileNextOffset uint64
parallelismChan chan struct{}
parallelismChanSize uint64
inodeVolumeHandle inode.VolumeHandle
headhunterVolumeHandle headhunter.VolumeHandle
inodeBPTree sortedmap.BPlusTree // Maps Inode# to LinkCount
childrenWaitGroup sync.WaitGroup
}
type validateVolumeStruct struct {
jobStruct
objectBPTree sortedmap.BPlusTree // Maps Object# to ByteCount
lostAndFoundDirInodeNumber inode.InodeNumber
accountName string
checkpointContainerName string
}
type scrubVolumeStruct struct {
jobStruct
}
func (jS *jobStruct) Active() (active bool) {
active = jS.active
return
}
func (jS *jobStruct) Wait() {
jS.globalWaitGroup.Wait()
}
func (jS *jobStruct) Cancel() {
jS.stopFlag = true
jS.Wait()
}
func (jS *jobStruct) Error() (err []string) {
var errString string
jS.Lock()
err = make([]string, 0, len(jS.err))
for _, errString = range jS.err {
err = append(err, errString)
}
jS.Unlock()
return
}
func (jS *jobStruct) Info() (info []string) {
var infoString string
jS.Lock()
info = make([]string, 0, len(jS.info))
for _, infoString = range jS.info {
info = append(info, infoString)
}
jS.Unlock()
return
}
func (jS *jobStruct) DumpKey(key sortedmap.Key) (keyAsString string, err error) {
keyAsString = fmt.Sprintf("0x%016X", key.(uint64))
err = nil
return
}
func (jS *jobStruct) DumpValue(value sortedmap.Value) (valueAsString string, err error) {
valueAsString = fmt.Sprintf("0x%016X", value.(uint64))
err = nil
return
}
func (jS *jobStruct) GetNode(objectNumber uint64, objectOffset uint64, objectLength uint64) (nodeByteSlice []byte, err error) {
jS.Lock()
defer jS.Unlock()
nodeByteSlice = make([]byte, 0, objectLength)
_, err = jS.bpTreeFile.Seek(io.SeekStart, int(objectOffset))
if nil != err {
return
}
_, err = io.ReadFull(jS.bpTreeFile, nodeByteSlice)
return
}
func (jS *jobStruct) PutNode(nodeByteSlice []byte) (objectNumber uint64, objectOffset uint64, err error) {
jS.Lock()
defer jS.Unlock()
_, err = jS.bpTreeFile.Seek(io.SeekEnd, int(0))
if nil != err {
return
}
_, err = jS.bpTreeFile.WriteAt(nodeByteSlice, int64(jS.bpTreeFileNextOffset))
if nil != err {
return
}
objectNumber = 0
objectOffset = jS.bpTreeFileNextOffset
jS.bpTreeFileNextOffset += uint64(len(nodeByteSlice))
return
}
func (jS *jobStruct) DiscardNode(objectNumber uint64, objectOffset uint64, objectLength uint64) (err error) {
// Short-lived vVS.bpTreeFile... no compaction/garbage-collection needed
err = nil
return
}
func (jS *jobStruct) PackKey(key sortedmap.Key) (packedKey []byte, err error) {
var (
u64 uint64
)
u64 = key.(uint64)
packedKey = make([]byte, 8)
binary.LittleEndian.PutUint64(packedKey, u64)
err = nil
return
}
func (jS *jobStruct) UnpackKey(payloadData []byte) (key sortedmap.Key, bytesConsumed uint64, err error) {
if 8 > len(payloadData) {
err = fmt.Errorf("fs.validateVolumeStruct.UnpackKey() called with insufficiently sized payloadData (%v) - should be at least 8", len(payloadData))
return
}
key = binary.LittleEndian.Uint64(payloadData[:8])
bytesConsumed = 8
err = nil
return
}
func (jS *jobStruct) PackValue(value sortedmap.Value) (packedValue []byte, err error) {
var (
u64 uint64
)
u64 = value.(uint64)
packedValue = make([]byte, 8)
binary.LittleEndian.PutUint64(packedValue, u64)
err = nil
return
}
func (jS *jobStruct) UnpackValue(payloadData []byte) (value sortedmap.Value, bytesConsumed uint64, err error) {
if 8 > len(payloadData) {
err = fmt.Errorf("fs.validateVolumeStruct.UnpackValue() called with insufficiently sized payloadData (%v) - should be at least 8", len(payloadData))
return
}
value = binary.LittleEndian.Uint64(payloadData[:8])
bytesConsumed = 8
err = nil
return
}
func (jS *jobStruct) jobStartParallelism(parallelismChanSize uint64) {
var (
i uint64
)
jS.parallelismChan = make(chan struct{}, parallelismChanSize)
jS.parallelismChanSize = parallelismChanSize
for i = uint64(0); i < parallelismChanSize; i++ {
jS.jobReleaseParallelism()
}
}
func (jS *jobStruct) jobGrabParallelism() {
_ = <-jS.parallelismChan
}
func (jS *jobStruct) jobReleaseParallelism() {
jS.parallelismChan <- struct{}{}
}
func (jS *jobStruct) jobEndParallelism() {
var (
i uint64
)
for i = uint64(0); i < jS.parallelismChanSize; i++ {
jS.jobGrabParallelism()
}
}
func (jS *jobStruct) jobLogErr(formatString string, args ...interface{}) {
jS.Lock()
jS.jobLogErrWhileLocked(formatString, args...)
jS.Unlock()
}
func (jS *jobStruct) jobLogErrWhileLocked(formatString string, args ...interface{}) {
var (
suffix string
)
suffix = fmt.Sprintf(formatString, args...)
logger.Errorf("%v[%v] %v", jS.jobType, jS.volumeName, suffix)
jS.err = append(jS.err, fmt.Sprintf("%v %v", time.Now().Format(time.RFC3339), suffix))
}
func (jS *jobStruct) jobLogInfo(formatString string, args ...interface{}) {
jS.Lock()
jS.jobLogInfoWhileLocked(formatString, args...)
jS.Unlock()
}
func (jS *jobStruct) jobLogInfoWhileLocked(formatString string, args ...interface{}) {
var (
suffix string
)
suffix = fmt.Sprintf(formatString, args...)
logger.Infof("%v[%v] %v", jS.jobType, jS.volumeName, suffix)
jS.info = append(jS.info, fmt.Sprintf("%v %v", time.Now().Format(time.RFC3339), suffix))
}
func (vVS *validateVolumeStruct) validateVolumeInode(inodeNumber uint64) {
var (
err error
)
defer vVS.childrenWaitGroup.Done()
defer vVS.jobReleaseParallelism()
err = vVS.inodeVolumeHandle.Validate(inode.InodeNumber(inodeNumber), false)
if nil != err {
vVS.jobLogInfo("Got inode.Validate(0x%016X) failure: %v", inodeNumber, err)
// Ultimately we will to delete or fix corrupt inode, but only after
// fixing validation errors.
//
// vVS.Lock()
// defer vVS.Unlock()
//
// vVS.jobLogInfoWhileLocked("Got inode.Validate(0x%016X) failure: %v", inodeNumber, err)
// ok, err = vVS.inodeBPTree.Put(inodeNumber, invalidLinkCount)
// if nil != err {
// vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.Put(0x%016X, invalidLinkCount) failure: %v", inodeNumber, err)
// return
// }
// if !ok {
// vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.Put(0x%016X, invalidLinkCount) !ok", inodeNumber)
// return
// }
}
}
func (vVS *validateVolumeStruct) validateVolumeIncrementCalculatedLinkCountWhileLocked(inodeNumber uint64) (ok bool) {
var (
err error
linkCount uint64
value sortedmap.Value
)
value, ok, err = vVS.inodeBPTree.GetByKey(inodeNumber)
if nil != err {
vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.GetByKey(0x%016X) failure: %v", inodeNumber, err)
ok = false
return
}
if !ok {
vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.GetByKey(0x%016X) !ok", inodeNumber)
ok = false
return
}
linkCount = value.(uint64) + 1
ok, err = vVS.inodeBPTree.PatchByKey(inodeNumber, linkCount)
if nil != err {
vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.PatchByKey(0x%016X,) failure: %v", inodeNumber, err)
ok = false
return
}
if !ok {
vVS.jobLogErrWhileLocked("Got vVS.inodeBPTree.PatchByKey(0x%016X,) !ok", inodeNumber)
ok = false
return
}
ok = true
return
}
func (vVS *validateVolumeStruct) validateVolumeCalculateLinkCount(parentDirInodeNumber uint64, dirInodeNumber uint64) {
var (
dirEntrySlice []inode.DirEntry
dotDotWasSeen bool
dotWasSeen bool
err error
inodeNumber uint64
inodeType inode.InodeType
moreEntries bool
ok bool
prevReturnedAsString string
)
defer vVS.childrenWaitGroup.Done()
defer vVS.jobReleaseParallelism()
prevReturnedAsString = ""
dotWasSeen = false
dotDotWasSeen = false
forLabel:
for {
if vVS.stopFlag {
return
}
dirEntrySlice, moreEntries, err = vVS.inodeVolumeHandle.ReadDir(inode.InodeNumber(dirInodeNumber), 1, 0, prevReturnedAsString)
if nil != err {
vVS.jobLogErr("Got inode.ReadDir(0x%016X,1,0,\"%v\") failure: %v", dirInodeNumber, prevReturnedAsString, err)
return
}
if 0 == len(dirEntrySlice) {
break forLabel
} else if 1 < len(dirEntrySlice) {
vVS.jobLogErr("Got too many DirEntry's from inode.ReadDir(0x%016X,1,0,\"%v\")", dirInodeNumber, prevReturnedAsString)
return
}
// Increment LinkCount for dirEntrySlice[0]'s InodeNumber
inodeNumber = uint64(dirEntrySlice[0].InodeNumber)
prevReturnedAsString = dirEntrySlice[0].Basename
vVS.Lock()
if ("." == prevReturnedAsString) && (inodeNumber != dirInodeNumber) {
_, err = vVS.inodeVolumeHandle.Unlink(inode.InodeNumber(dirInodeNumber), ".", true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Unlink(0x%016X,\".\",true) failure: %v", dirInodeNumber, err)
vVS.Unlock()
return
}
err = vVS.inodeVolumeHandle.Link(inode.InodeNumber(dirInodeNumber), ".", inode.InodeNumber(dirInodeNumber), true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Link(0x%016X,\".\",0x%016X,true) failure: %v", dirInodeNumber, dirInodeNumber, err)
vVS.Unlock()
return
}
vVS.jobLogInfoWhileLocked("\".\" dirEntry in dirInodeNumber 0x%016X was 0x%016X...fixed to point to dirInodeNumber", dirInodeNumber, inodeNumber)
inodeNumber = dirInodeNumber
} else if (".." == prevReturnedAsString) && (inodeNumber != parentDirInodeNumber) {
_, err = vVS.inodeVolumeHandle.Unlink(inode.InodeNumber(dirInodeNumber), "..", true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Unlink(0x%016X,\"..\",true) failure: %v", dirInodeNumber, err)
vVS.Unlock()
return
}
err = vVS.inodeVolumeHandle.Link(inode.InodeNumber(dirInodeNumber), "..", inode.InodeNumber(parentDirInodeNumber), true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Link(0x%016X,\"..\",0x%016X,true) failure: %v", dirInodeNumber, parentDirInodeNumber, err)
vVS.Unlock()
return
}
vVS.jobLogInfoWhileLocked("\"..\" dirEntry in dirInodeNumber 0x%016X was 0x%016X...fixed to point to parentDirInodeNumber (0x%016X)", dirInodeNumber, inodeNumber, parentDirInodeNumber)
inodeNumber = parentDirInodeNumber
}
ok = vVS.validateVolumeIncrementCalculatedLinkCountWhileLocked(inodeNumber)
if !ok {
vVS.Unlock()
return
}
vVS.Unlock()
// Recurse into sub-directories
if "." == prevReturnedAsString {
dotWasSeen = true
} else if ".." == prevReturnedAsString {
dotDotWasSeen = true
} else {
inodeType, err = vVS.inodeVolumeHandle.GetType(inode.InodeNumber(inodeNumber))
if nil != err {
vVS.jobLogErr("Got inode.GetType(0x%016X) failure: %v", inodeNumber, err)
return
}
if inode.DirType == inodeType {
vVS.jobGrabParallelism()
vVS.childrenWaitGroup.Add(1)
go vVS.validateVolumeCalculateLinkCount(dirInodeNumber, inodeNumber)
}
}
if !moreEntries {
break forLabel
}
}
if !dotWasSeen {
vVS.Lock()
err = vVS.inodeVolumeHandle.Link(inode.InodeNumber(dirInodeNumber), ".", inode.InodeNumber(dirInodeNumber), true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Link(0x%016X,\".\",0x%016X,true) failure: %v", dirInodeNumber, dirInodeNumber, err)
vVS.Unlock()
return
}
ok = vVS.validateVolumeIncrementCalculatedLinkCountWhileLocked(dirInodeNumber)
if !ok {
vVS.Unlock()
return
}
vVS.jobLogInfoWhileLocked("\"..\" dirEntry in dirInodeNumber 0x%016X was missing...fixed to point to dirInodeNumber", dirInodeNumber)
vVS.Unlock()
return
}
if !dotDotWasSeen {
vVS.Lock()
err = vVS.inodeVolumeHandle.Link(inode.InodeNumber(dirInodeNumber), "..", inode.InodeNumber(parentDirInodeNumber), true)
if nil != err {
vVS.jobLogErrWhileLocked("Got inode.Link(0x%016X,\"..\",0x%016X,true) failure: %v", dirInodeNumber, parentDirInodeNumber, err)
vVS.Unlock()
return
}
ok = vVS.validateVolumeIncrementCalculatedLinkCountWhileLocked(parentDirInodeNumber)
if !ok {
vVS.Unlock()
return
}
vVS.jobLogInfoWhileLocked("\"..\" dirEntry in dirInodeNumber 0x%016X was missing...fixed to point to parentDirInodeNumber (0x%016X)", dirInodeNumber, parentDirInodeNumber)
vVS.Unlock()
return
}
}
func (vVS *validateVolumeStruct) validateVolumeFixLinkCount(inodeNumber uint64, linkCountComputed uint64) {
var (
err error
linkCountInInode uint64
)
defer vVS.childrenWaitGroup.Done()
defer vVS.jobReleaseParallelism()
linkCountInInode, err = vVS.inodeVolumeHandle.GetLinkCount(inode.InodeNumber(inodeNumber))
if nil != err {
vVS.jobLogErr("Got inode.GetLinkCount(0x%016X) failure: %v", inodeNumber, err)
return
}
if linkCountComputed != linkCountInInode {
err = vVS.inodeVolumeHandle.SetLinkCount(inode.InodeNumber(inodeNumber), linkCountComputed)
if nil == err {
vVS.jobLogInfo("Corrected LinkCount in Inode# 0x%016X from 0x%016X to 0x%016X", inodeNumber, linkCountInInode, linkCountComputed)
} else {
vVS.jobLogErr("Got inode.SetLinkCount(0x%016X,) failure: %v", inodeNumber, err)
return
}
}
}
func (vVS *validateVolumeStruct) validateVolumeIncrementByteCounts(inodeNumber uint64) {
var (
err error
layoutReport sortedmap.LayoutReport
objectBytes uint64
objectNumber uint64
ok bool
value sortedmap.Value
)
defer vVS.childrenWaitGroup.Done()
defer vVS.jobReleaseParallelism()
if vVS.stopFlag {
return
}
layoutReport, err = vVS.inodeVolumeHandle.FetchLayoutReport(inode.InodeNumber(inodeNumber))
if nil != err {
vVS.jobLogErr("Got vVS.inodeVolumeHandle.FetchLayoutReport(0x%016X) failure: %v", inodeNumber, err)
return
}
vVS.Lock()
defer vVS.Unlock()
for objectNumber, objectBytes = range layoutReport {
value, ok, err = vVS.objectBPTree.GetByKey(objectNumber)
if nil != err {
vVS.jobLogErrWhileLocked("Got vVS.objectBPTree.GetByKey() failure: %v", err)
return
}
if ok {
objectBytes += value.(uint64)
ok, err = vVS.objectBPTree.PatchByKey(objectNumber, objectBytes)
if nil != err {
vVS.jobLogErrWhileLocked("Got vVS.objectBPTree.PatchByKey() failure: %v", err)
return
}
if !ok {
vVS.jobLogErrWhileLocked("Got vVS.objectBPTree.PatchByKey(0) !ok")
return
}
} else {
ok, err = vVS.objectBPTree.Put(objectNumber, objectBytes)
if nil != err {
vVS.jobLogErrWhileLocked("Got vVS.objectBPTree.Put() failure: %v", err)
return
}
if !ok {
vVS.jobLogErrWhileLocked("Got vVS.objectBPTree.Put() !ok")
return
}
}
}
}
func (vVS *validateVolumeStruct) validateVolume() {
var (
checkpointContainerObjectList []string
checkpointContainerObjectName string
checkpointContainerObjectNumber uint64
discrepencies uint64
err error
headhunterLayoutReport sortedmap.LayoutReport
inodeCount int
inodeIndex uint64
inodeNumber uint64
inodeType inode.InodeType
key sortedmap.Key
linkCountComputed uint64
moreEntries bool
objectIndex uint64
objectNumber uint64
ok bool
toDestroyInodeNumber inode.InodeNumber
validObjectNameRE = regexp.MustCompile("\\A[0-9a-fA-F]+\\z")
value sortedmap.Value
)
vVS.jobLogInfo("FSCK job initiated")
defer func(vVS *validateVolumeStruct) {
if vVS.stopFlag {
vVS.jobLogInfo("FSCK job stopped")
} else if 0 == len(vVS.err) {
vVS.jobLogInfo("FSCK job completed without error")
} else if 1 == len(vVS.err) {
vVS.jobLogInfo("FSCK job exited with one error")
} else {
vVS.jobLogInfo("FSCK job exited with errors")
}
}(vVS)
defer func(vVS *validateVolumeStruct) {
vVS.active = false
}(vVS)
defer vVS.globalWaitGroup.Done()
// Find specified volume
globals.Lock()
vVS.volume, ok = globals.volumeMap[vVS.volumeName]
if !ok {
globals.Unlock()
vVS.jobLogErr("Couldn't find fs.volumeStruct")
return
}
globals.Unlock()
vVS.inodeVolumeHandle, err = inode.FetchVolumeHandle(vVS.volumeName)
if nil != err {
vVS.jobLogErr("Couldn't find inode.VolumeHandle")
return
}
vVS.headhunterVolumeHandle, err = headhunter.FetchVolumeHandle(vVS.volumeName)
if nil != err {
vVS.jobLogErr("Couldn't find headhunter.VolumeHandle")
return
}
vVS.volume.jobRWMutex.Lock()
defer vVS.volume.jobRWMutex.Unlock()
// Flush all File Inodes currently in flight
vVS.volume.untrackInFlightFileInodeDataAll()
vVS.jobLogInfo("Completed flush of all inflight File Inode write traffic")
// Do a checkpoint before actual FSCK work
err = vVS.headhunterVolumeHandle.DoCheckpoint()
if nil != err {
vVS.jobLogErr("Got headhunter.DoCheckpoint failure: %v", err)
return
}
vVS.jobLogInfo("Completed checkpoint prior to FSCK work")
// Setup B+Tree to hold arbitrarily sized map[uint64]uint64 (i.e. beyond what will fit in memoory)
vVS.bpTreeFile, err = ioutil.TempFile("", "ProxyFS_VaidateVolume_")
if nil != err {
vVS.jobLogErr("Got ioutil.TempFile() failure: %v", err)
return
}
defer func(vVS *validateVolumeStruct) {
var (
bpTreeFileName string
)
bpTreeFileName = vVS.bpTreeFile.Name()
_ = vVS.bpTreeFile.Close()
_ = os.Remove(bpTreeFileName)
}(vVS)
vVS.bpTreeFileNextOffset = 0
vVS.bpTreeCache = sortedmap.NewBPlusTreeCache(jobBPTreeEvictLowLimit, jobBPTreeEvictHighLimit)
// Validate all Inodes in InodeRec table in headhunter
vVS.inodeBPTree = sortedmap.NewBPlusTree(jobBPTreeMaxKeysPerNode, sortedmap.CompareUint64, vVS, vVS.bpTreeCache)
defer func(vVS *validateVolumeStruct) {
var err error
err = vVS.inodeBPTree.Discard()
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.Discard() failure: %v", err)
}
}(vVS)
vVS.jobLogInfo("Beginning enumeration of inodes to be validated")
inodeIndex = 0
for {
if vVS.stopFlag {
return
}
inodeNumber, ok, err = vVS.headhunterVolumeHandle.IndexedInodeNumber(inodeIndex)
if nil != err {
vVS.jobLogErr("Got headhunter.IndexedInodeNumber(0x%016X) failure: %v", inodeIndex, err)
return
}
if !ok {
break
}
ok, err = vVS.inodeBPTree.Put(inodeNumber, uint64(0)) // Initial Linkount is 0
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.Put(0x%016X, 0) failure: %v", inodeNumber, err)
return
}
if !ok {
vVS.jobLogErr("Got vVS.inodeBPTree.Put(0x%016X, 0) !ok", inodeNumber)
return
}
inodeIndex++
}
if vVS.stopFlag || (0 < len(vVS.err)) {
return
}
vVS.jobLogInfo("Completed enumeration of inodes to be validated")
vVS.jobLogInfo("Beginning validation of inodes")
inodeCount, err = vVS.inodeBPTree.Len()
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.Len() failure: %v", err)
return
}
vVS.jobStartParallelism(validateVolumeInodeParallelism)
for inodeIndex = uint64(0); inodeIndex < uint64(inodeCount); inodeIndex++ {
if vVS.stopFlag {
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
return
}
key, _, ok, err = vVS.inodeBPTree.GetByIndex(int(inodeIndex))
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.GetByIndex(0x%016X) failure: %v", inodeIndex, err)
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
return
}
if !ok {
vVS.jobLogErr("Got vVS.inodeBPTree.GetByIndex(0x%016X) !ok", inodeIndex)
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
return
}
inodeNumber = key.(uint64)
vVS.jobGrabParallelism()
vVS.childrenWaitGroup.Add(1)
go vVS.validateVolumeInode(inodeNumber)
}
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
if vVS.stopFlag || (0 < len(vVS.err)) {
return
}
// Scan inodeBPTree looking for invalidated Inodes
inodeIndex = 0
for {
key, value, ok, err = vVS.inodeBPTree.GetByIndex(int(inodeIndex))
if nil != err {
vVS.jobLogErr("Got inodeBPTree.GetByIndex(0x%016X) failure: %v", inodeIndex, err)
return
}
if !ok {
break
}
inodeNumber = key.(uint64)
linkCountComputed = value.(uint64)
if invalidLinkCount == linkCountComputed {
err = vVS.headhunterVolumeHandle.DeleteInodeRec(inodeNumber)
if nil != err {
vVS.jobLogErr("Got headhunter.DeleteInodeRec(0x%016X) failure: %v", inodeNumber, err)
return
}
ok, err = vVS.inodeBPTree.DeleteByIndex(int(inodeIndex))
if nil != err {
vVS.jobLogErr("Got inodeBPTree.DeleteByIndex(0x%016X) [inodeNumber == 0x%16X] failure: %v", inodeIndex, inodeNumber, err)
return
}
if !ok {
vVS.jobLogErr("Got inodeBPTree.DeleteByIndex(0x%016X) [inodeNumber == 0x%16X] !ok", inodeIndex, inodeNumber)
return
}
vVS.jobLogInfo("Removing inodeNumber 0x%016X due to validation failure", inodeNumber)
} else {
inodeIndex++
}
}
if vVS.stopFlag || (0 < len(vVS.err)) {
return
}
vVS.jobLogInfo("Completed validation of inodes")
// TreeWalk computing LinkCounts for all inodeNumbers
_, ok, err = vVS.inodeBPTree.GetByKey(uint64(inode.RootDirInodeNumber))
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.GetByKey(RootDirInodeNumber) failure: %v", err)
return
}
if !ok {
vVS.jobLogErr("Got vVS.inodeBPTree.GetByKey(RootDirInodeNumber) !ok")
return
}
vVS.jobStartParallelism(validateVolumeCalculateLinkCountParallelism)
vVS.jobGrabParallelism()
vVS.childrenWaitGroup.Add(1)
go vVS.validateVolumeCalculateLinkCount(uint64(inode.RootDirInodeNumber), uint64(inode.RootDirInodeNumber))
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
if vVS.stopFlag || (0 < len(vVS.err)) {
return
}
vVS.jobLogInfo("Completed treewalk before populating /%v/", lostAndFoundDirName)
// Establish that lostAndFoundDirName exists
vVS.lostAndFoundDirInodeNumber, err = vVS.inodeVolumeHandle.Lookup(inode.RootDirInodeNumber, lostAndFoundDirName)
if nil == err {
// Found it - make sure it is a directory
inodeType, err = vVS.inodeVolumeHandle.GetType(vVS.lostAndFoundDirInodeNumber)
if nil != err {
vVS.jobLogErr("Got inode.GetType(vVS.lostAndFoundDirNumber==0x%016X) failure: %v", vVS.lostAndFoundDirInodeNumber, err)
return
}
if inode.DirType != inodeType {
vVS.jobLogErr("Got inode.GetType(vVS.lostAndFoundDirNumber==0x%016X) non-DirType", vVS.lostAndFoundDirInodeNumber)
return
}
vVS.jobLogInfo("Found pre-existing /%v/", lostAndFoundDirName)
} else {
if blunder.Is(err, blunder.NotFoundError) {
// Create it
vVS.lostAndFoundDirInodeNumber, err = vVS.inodeVolumeHandle.CreateDir(inode.PosixModePerm, 0, 0)
if nil != err {
vVS.jobLogErr("Got inode.CreateDir() failure: %v", err)
return
}
err = vVS.inodeVolumeHandle.Link(inode.RootDirInodeNumber, lostAndFoundDirName, vVS.lostAndFoundDirInodeNumber, false)
if nil != err {
vVS.jobLogErr("Got inode.Link(inode.RootDirInodeNumber, lostAndFoundDirName, vVS.lostAndFoundDirInodeNumber, false) failure: %v", err)
err = vVS.inodeVolumeHandle.Destroy(vVS.lostAndFoundDirInodeNumber)
if nil != err {
vVS.jobLogErr("Got inode.Destroy(vVS.lostAndFoundDirInodeNumber) failure: %v", err)
}
return
}
ok, err = vVS.inodeBPTree.Put(uint64(vVS.lostAndFoundDirInodeNumber), uint64(2)) // /<lostAndFoundDirName> as well as /<lostAndFoundDirName>/.
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.Put(vVS.lostAndFoundDirInodeNumber, 1) failure: %v", err)
vVS.Unlock()
return
}
if !ok {
vVS.jobLogErr("Got vVS.inodeBPTree.Put(vVS.lostAndFoundDirInodeNumber, 1) !ok")
vVS.Unlock()
return
}
vVS.jobLogInfo("Created /%v/", lostAndFoundDirName)
} else {
vVS.jobLogErr("Got inode.Lookup(inode.RootDirInodeNumber, lostAndFoundDirName) failure: %v", err)
return
}
}
// TODO: Scan B+Tree placing top-most orphan DirInodes as elements of vVS.lostAndFoundDirInodeNumber
// Re-compute LinkCounts
inodeCount, err = vVS.inodeBPTree.Len()
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.Len() failure: %v", err)
return
}
for inodeIndex = uint64(0); inodeIndex < uint64(inodeCount); inodeIndex++ {
if vVS.stopFlag {
return
}
ok, err = vVS.inodeBPTree.PatchByIndex(int(inodeIndex), uint64(0))
if nil != err {
vVS.jobLogErr("Got vVS.inodeBPTree.PatchByIndex(0x%016X, 0) failure: %v", inodeIndex, err)
return
}
if !ok {
vVS.jobLogErr("Got vVS.inodeBPTree.PatchByIndex(0x%016X, 0) !ok", inodeIndex)
return
}
}
vVS.jobStartParallelism(validateVolumeCalculateLinkCountParallelism)
vVS.jobGrabParallelism()
vVS.childrenWaitGroup.Add(1)
go vVS.validateVolumeCalculateLinkCount(uint64(inode.RootDirInodeNumber), uint64(inode.RootDirInodeNumber))
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
if vVS.stopFlag || (0 < len(vVS.err)) {
return
}
vVS.jobLogInfo("Completed treewalk after populating /%v/", lostAndFoundDirName)
// TODO: Scan B+Tree placing orphaned non-DirInodes as elements of vVS.lostAndFoundDirInodeNumber
// Update incorrect LinkCounts
vVS.jobStartParallelism(validateVolumeFixLinkCountParallelism)
for inodeIndex = uint64(0); inodeIndex < uint64(inodeCount); inodeIndex++ {
if vVS.stopFlag {
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
return
}
key, value, ok, err = vVS.inodeBPTree.GetByIndex(int(inodeIndex))
if nil != err {
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
vVS.jobLogErr("Got vVS.inodeBPTree.GetByIndex(0x%016X) failure: %v", inodeIndex, err)
return
}
if !ok {
vVS.childrenWaitGroup.Wait()
vVS.jobEndParallelism()
vVS.jobLogErr("Got vVS.inodeBPTree.GetByIndex(0x%016X) !ok", inodeIndex)
return
}
inodeNumber = key.(uint64)