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config.go
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// Copyright (c) 2015-2021, NVIDIA CORPORATION.
// SPDX-License-Identifier: Apache-2.0
package inode
import (
"fmt"
"sync"
"time"
"unsafe"
"github.com/swiftstack/cstruct"
"github.com/swiftstack/sortedmap"
"github.com/swiftstack/ProxyFS/blunder"
"github.com/swiftstack/ProxyFS/conf"
"github.com/swiftstack/ProxyFS/headhunter"
"github.com/swiftstack/ProxyFS/logger"
"github.com/swiftstack/ProxyFS/swiftclient"
"github.com/swiftstack/ProxyFS/trackedlock"
"github.com/swiftstack/ProxyFS/transitions"
)
type readCacheKeyStruct struct {
volumeName string
logSegmentNumber uint64
cacheLineTag uint64 // LogSegment offset / readCacheLineSize
}
type readCacheElementStruct struct {
readCacheKey readCacheKeyStruct
next *readCacheElementStruct // nil if MRU element of volumeGroupStruct.readCache
prev *readCacheElementStruct // nil if LRU element of volumeGroupStruct.readCache
cacheLine []byte
}
type volumeGroupStruct struct {
trackedlock.Mutex
name string
volumeMap map[string]*volumeStruct // key == volumeStruct.volumeName
numServed uint64
virtualIPAddr string
activePeerPrivateIPAddr string
readCacheLineSize uint64
readCacheWeight uint64
readCacheLineCount uint64
readCache map[readCacheKeyStruct]*readCacheElementStruct
readCacheMRU *readCacheElementStruct
readCacheLRU *readCacheElementStruct
}
type physicalContainerLayoutStruct struct {
name string
containerStoragePolicy string // [<PhysicalContainerLayout>]ContainerStoragePolicy
containerNamePrefix string // [<PhysicalContainerLayout>]ContainerNamePrefix
containerNameSlice []string // == slice of current PhysicalContainers for this PhysicalContainerLayout
// Note: all prefixed by containerNamePrefix
containersPerPeer uint64 // [<PhysicalContainerLayout>]ContainersPerPeer
maxObjectsPerContainer uint64 // [<PhysicalContainerLayout>]MaxObjectsPerContainer
containerNameSliceNextIndex uint64 // == next index in nameSlice
containerNameSliceLoopCount uint64 // == number of times looped through nameSlice
// Note: if 0 == (containerNameSliceLoopCount mod maxObjectsPerContainer)
// then we need to re-provision containerNameSlice
}
type volumeStruct struct {
trackedlock.Mutex
volumeGroup *volumeGroupStruct
served bool
fsid uint64
volumeName string
accountName string
maxEntriesPerDirNode uint64
maxExtentsPerFileNode uint64
defaultPhysicalContainerLayout *physicalContainerLayoutStruct
maxFlushSize uint64
headhunterVolumeHandle headhunter.VolumeHandle
inodeCache sortedmap.LLRBTree // key == InodeNumber; value == *inMemoryInodeStruct
inodeCacheStopChan chan struct{}
inodeCacheWG sync.WaitGroup
inodeCacheLRUHead *inMemoryInodeStruct
inodeCacheLRUTail *inMemoryInodeStruct
inodeCacheLRUItems uint64
inodeCacheLRUMaxBytes uint64
inodeCacheLRUTicker *time.Ticker
inodeCacheLRUTickerInterval time.Duration
snapShotPolicy *snapShotPolicyStruct
}
const (
defaultNoWriteErrno = blunder.NoSpaceError
defaultNoWriteErrnoString = "ENOSPC"
defaultReadOnlyErrno = blunder.ReadOnlyError
defaultReadOnlyErrnoString = "EROFS"
)
type globalsStruct struct {
trackedlock.Mutex
whoAmI string
myPrivateIPAddr string
dirEntryCache sortedmap.BPlusTreeCache
dirEntryCachePriorCacheHits uint64
dirEntryCachePriorCacheMisses uint64
fileExtentMapCache sortedmap.BPlusTreeCache
fileExtentMapCachePriorCacheHits uint64
fileExtentMapCachePriorCacheMisses uint64
volumeGroupMap map[string]*volumeGroupStruct // key == volumeGroupStruct.name
volumeMap map[string]*volumeStruct // key == volumeStruct.volumeName
accountMap map[string]*volumeStruct // key == volumeStruct.accountName
fileExtentStructSize uint64 // pre-calculated size of cstruct-packed fileExtentStruct
supportedOnDiskInodeVersions map[Version]struct{} // key == on disk inode version
corruptionDetectedTrueBuf []byte // holds serialized CorruptionDetected == true
corruptionDetectedFalseBuf []byte // holds serialized CorruptionDetected == false
versionV1Buf []byte // holds serialized Version == V1
inodeRecDefaultPreambleBuf []byte // holds concatenated corruptionDetectedFalseBuf & versionV1Buf
inodeSize uint64 // size of in-memory inode struct
openLogSegmentLRUHead *inFlightLogSegmentStruct
openLogSegmentLRUTail *inFlightLogSegmentStruct
openLogSegmentLRUItems uint64
noWriteThresholdErrno blunder.FsError // either blunder.NotPermError or blunder.ReadOnlyError or blunder.NoSpaceError
noWriteThresholdErrnoString string // either "EPERM" or "EROFS" or "ENOSPC"
readOnlyThresholdErrno blunder.FsError // either blunder.NotPermError or blunder.ReadOnlyError or blunder.NoSpaceError
readOnlyThresholdErrnoString string // either "EPERM" or "EROFS" or "ENOSPC"
rwMode RWModeType // One of RWMode{Normal|NoWrite|ReadOnly}
}
var globals globalsStruct
func init() {
transitions.Register("inode", &globals)
}
func (dummy *globalsStruct) Up(confMap conf.ConfMap) (err error) {
var (
corruptionDetectedFalse = CorruptionDetected(false)
corruptionDetectedTrue = CorruptionDetected(true)
dirEntryCacheEvictHighLimit uint64
dirEntryCacheEvictLowLimit uint64
fileExtentMapEvictHighLimit uint64
fileExtentMapEvictLowLimit uint64
ok bool
peerName string
peerNames []string
peerPrivateIPAddr string
peerPrivateIPAddrMap map[string]string
tempInode inMemoryInodeStruct
versionV1 = Version(V1)
)
peerPrivateIPAddrMap = make(map[string]string)
peerNames, err = confMap.FetchOptionValueStringSlice("Cluster", "Peers")
if nil != err {
return
}
for _, peerName = range peerNames {
peerPrivateIPAddr, err = confMap.FetchOptionValueString("Peer:"+peerName, "PrivateIPAddr")
if nil != err {
return
}
peerPrivateIPAddrMap[peerName] = peerPrivateIPAddr
}
globals.whoAmI, err = confMap.FetchOptionValueString("Cluster", "WhoAmI")
if nil != err {
return
}
globals.myPrivateIPAddr, ok = peerPrivateIPAddrMap[globals.whoAmI]
if !ok {
err = fmt.Errorf("Cluster.WhoAmI (\"%v\") not in Cluster.Peers list", globals.whoAmI)
return
}
dirEntryCacheEvictLowLimit, err = confMap.FetchOptionValueUint64("FSGlobals", "DirEntryCacheEvictLowLimit")
if nil != err {
return
}
dirEntryCacheEvictHighLimit, err = confMap.FetchOptionValueUint64("FSGlobals", "DirEntryCacheEvictHighLimit")
if nil != err {
return
}
globals.dirEntryCache = sortedmap.NewBPlusTreeCache(dirEntryCacheEvictLowLimit, dirEntryCacheEvictHighLimit)
globals.dirEntryCachePriorCacheHits = 0
globals.dirEntryCachePriorCacheMisses = 0
fileExtentMapEvictLowLimit, err = confMap.FetchOptionValueUint64("FSGlobals", "FileExtentMapEvictLowLimit")
if nil != err {
return
}
fileExtentMapEvictHighLimit, err = confMap.FetchOptionValueUint64("FSGlobals", "FileExtentMapEvictHighLimit")
if nil != err {
return
}
globals.fileExtentMapCache = sortedmap.NewBPlusTreeCache(fileExtentMapEvictLowLimit, fileExtentMapEvictHighLimit)
globals.fileExtentMapCachePriorCacheHits = 0
globals.fileExtentMapCachePriorCacheMisses = 0
globals.volumeGroupMap = make(map[string]*volumeGroupStruct)
globals.volumeMap = make(map[string]*volumeStruct)
globals.accountMap = make(map[string]*volumeStruct)
globals.inodeSize = uint64(unsafe.Sizeof(tempInode))
globals.openLogSegmentLRUHead = nil
globals.openLogSegmentLRUTail = nil
globals.openLogSegmentLRUItems = 0
globals.fileExtentStructSize, _, err = cstruct.Examine(fileExtentStruct{})
if nil != err {
return
}
globals.supportedOnDiskInodeVersions = make(map[Version]struct{})
globals.supportedOnDiskInodeVersions[V1] = struct{}{}
globals.corruptionDetectedTrueBuf, err = cstruct.Pack(corruptionDetectedTrue, cstruct.LittleEndian)
if nil != err {
return
}
globals.corruptionDetectedFalseBuf, err = cstruct.Pack(corruptionDetectedFalse, cstruct.LittleEndian)
if nil != err {
return
}
globals.versionV1Buf, err = cstruct.Pack(versionV1, cstruct.LittleEndian)
if nil != err {
return
}
globals.inodeRecDefaultPreambleBuf = make([]byte, 0, len(globals.corruptionDetectedFalseBuf)+len(globals.versionV1Buf))
globals.inodeRecDefaultPreambleBuf = append(globals.inodeRecDefaultPreambleBuf, globals.corruptionDetectedFalseBuf...)
globals.inodeRecDefaultPreambleBuf = append(globals.inodeRecDefaultPreambleBuf, globals.versionV1Buf...)
swiftclient.SetStarvationCallbackFunc(chunkedPutConnectionPoolStarvationCallback)
globals.rwMode = RWModeNormal
err = nil
return
}
func (dummy *globalsStruct) VolumeGroupCreated(confMap conf.ConfMap, volumeGroupName string, activePeer string, virtualIPAddr string) (err error) {
var (
ok bool
volumeGroup *volumeGroupStruct
volumeGroupSectionName string
)
volumeGroup = &volumeGroupStruct{
name: volumeGroupName,
volumeMap: make(map[string]*volumeStruct),
numServed: 0,
readCacheLineCount: 0,
readCache: make(map[readCacheKeyStruct]*readCacheElementStruct),
readCacheMRU: nil,
readCacheLRU: nil,
}
volumeGroupSectionName = "VolumeGroup:" + volumeGroupName
volumeGroup.virtualIPAddr, err = confMap.FetchOptionValueString(volumeGroupSectionName, "VirtualIPAddr")
if nil != err {
if nil == confMap.VerifyOptionValueIsEmpty(volumeGroupSectionName, "VirtualIPAddr") {
volumeGroup.virtualIPAddr = ""
} else {
return
}
}
if "" == activePeer {
volumeGroup.activePeerPrivateIPAddr = ""
} else {
volumeGroup.activePeerPrivateIPAddr, err = confMap.FetchOptionValueString("Peer:"+activePeer, "PrivateIPAddr")
if nil != err {
return
}
}
volumeGroup.readCacheLineSize, err = confMap.FetchOptionValueUint64(volumeGroupSectionName, "ReadCacheLineSize")
if nil != err {
return
}
if volumeGroup.readCacheLineSize < 4096 {
logger.Warnf("Section '%s' for VolumeGroup '%s' ReadCacheLineSize %d is < 4096; changing to 4096",
volumeGroupSectionName, volumeGroupName, volumeGroup.readCacheLineSize)
volumeGroup.readCacheLineSize = 4096
}
volumeGroup.readCacheWeight, err = confMap.FetchOptionValueUint64(volumeGroupSectionName, "ReadCacheWeight")
if nil != err {
return
}
if volumeGroup.readCacheWeight <= 0 {
logger.Warnf("Section '%s' for VolumeGroup '%s' ReadCacheWeight %d is <= 0; changing to 1",
volumeGroupSectionName, volumeGroupName, volumeGroup.readCacheWeight)
volumeGroup.readCacheWeight = 1
}
globals.Lock()
_, ok = globals.volumeGroupMap[volumeGroupName]
if ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeGroupCreated() called for preexisting VolumeGroup (%s)", volumeGroupName)
return
}
globals.volumeGroupMap[volumeGroupName] = volumeGroup
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) VolumeGroupMoved(confMap conf.ConfMap, volumeGroupName string, activePeer string, virtualIPAddr string) (err error) {
var (
ok bool
volumeGroup *volumeGroupStruct
)
globals.Lock()
volumeGroup, ok = globals.volumeGroupMap[volumeGroupName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeGroupMoved() called for nonexistent VolumeGroup (%s)", volumeGroupName)
return
}
volumeGroup.Lock()
if "" == activePeer {
volumeGroup.activePeerPrivateIPAddr = ""
} else {
volumeGroup.activePeerPrivateIPAddr, err = confMap.FetchOptionValueString("Peer:"+activePeer, "PrivateIPAddr")
if nil != err {
volumeGroup.Unlock()
globals.Unlock()
return
}
}
// Note that VirtualIPAddr, ReadCacheLineSize, & ReadCacheWeight are not reloaded
volumeGroup.Unlock()
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) VolumeGroupDestroyed(confMap conf.ConfMap, volumeGroupName string) (err error) {
var (
ok bool
volumeGroup *volumeGroupStruct
)
globals.Lock()
volumeGroup, ok = globals.volumeGroupMap[volumeGroupName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeGroupDestroyed() called for nonexistent VolumeGroup (%s)", volumeGroupName)
return
}
volumeGroup.Lock()
if 0 != len(volumeGroup.volumeMap) {
volumeGroup.Unlock()
globals.Unlock()
err = fmt.Errorf("inode.VolumeGroupDestroyed() called for non-empty VolumeGroup (%s)", volumeGroupName)
return
}
delete(globals.volumeGroupMap, volumeGroupName)
volumeGroup.Unlock()
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) VolumeCreated(confMap conf.ConfMap, volumeName string, volumeGroupName string) (err error) {
var (
ok bool
volumeGroup *volumeGroupStruct
volumeSectionName string
)
volume := &volumeStruct{volumeName: volumeName, served: false}
volumeSectionName = "Volume:" + volumeName
volume.fsid, err = confMap.FetchOptionValueUint64(volumeSectionName, "FSID")
if nil != err {
return
}
volume.accountName, err = confMap.FetchOptionValueString(volumeSectionName, "AccountName")
if nil != err {
return
}
globals.Lock()
_, ok = globals.volumeMap[volumeName]
if ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeCreated() called for preexiting Volume (%s)", volumeName)
return
}
_, ok = globals.accountMap[volume.accountName]
if ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeCreated() called for preexiting Account (%s)", volume.accountName)
return
}
volumeGroup, ok = globals.volumeGroupMap[volumeGroupName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeCreated() called for Volume (%s) to be added to nonexistent VolumeGroup (%s)", volumeName, volumeGroupName)
return
}
volumeGroup.Lock()
_, ok = volumeGroup.volumeMap[volumeName]
if ok {
volumeGroup.Unlock()
globals.Unlock()
err = fmt.Errorf("inode.VolumeCreated() called for preexiting Volume (%s) to be added to VolumeGroup (%s)", volumeName, volumeGroupName)
return
}
volume.volumeGroup = volumeGroup
volumeGroup.volumeMap[volumeName] = volume
globals.volumeMap[volumeName] = volume
globals.accountMap[volume.accountName] = volume
volumeGroup.Unlock()
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) VolumeMoved(confMap conf.ConfMap, volumeName string, volumeGroupName string) (err error) {
var (
newVolumeGroup *volumeGroupStruct
ok bool
oldVolumeGroup *volumeGroupStruct
volume *volumeStruct
)
globals.Lock()
volume, ok = globals.volumeMap[volumeName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeMoved() called for nonexistent Volume (%s)", volumeName)
return
}
if volume.served {
globals.Unlock()
err = fmt.Errorf("inode.VolumeMoved() called for Volume (%s) being actively served", volumeName)
return
}
newVolumeGroup, ok = globals.volumeGroupMap[volumeGroupName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeMoved() called for Volume (%s) to be moved to nonexistent VolumeGroup (%s)", volumeName, volumeGroupName)
return
}
newVolumeGroup.Lock()
_, ok = newVolumeGroup.volumeMap[volumeName]
if ok {
newVolumeGroup.Unlock()
globals.Unlock()
err = fmt.Errorf("inode.VolumeMoved() called for Volume (%s) to be moved to VolumeGroup (%s) already containing the Volume", volumeName, volumeGroupName)
return
}
oldVolumeGroup = volume.volumeGroup
oldVolumeGroup.Lock()
delete(oldVolumeGroup.volumeMap, volumeName)
newVolumeGroup.volumeMap[volumeName] = volume
volume.volumeGroup = newVolumeGroup
// Note that FSID & AccountName are not reloaded
oldVolumeGroup.Unlock()
newVolumeGroup.Unlock()
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) VolumeDestroyed(confMap conf.ConfMap, volumeName string) (err error) {
var (
ok bool
volume *volumeStruct
)
globals.Lock()
volume, ok = globals.volumeMap[volumeName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.VolumeDestroyed() called for nonexistent Volume (%s)", volumeName)
return
}
if volume.served {
globals.Unlock()
err = fmt.Errorf("inode.VolumeDestroyed() called for Volume (%s) being actively served", volumeName)
return
}
volume.volumeGroup.Lock()
delete(volume.volumeGroup.volumeMap, volumeName)
delete(globals.volumeMap, volumeName)
delete(globals.accountMap, volume.accountName)
volume.volumeGroup.Unlock()
globals.Unlock()
err = nil
return
}
func (dummy *globalsStruct) ServeVolume(confMap conf.ConfMap, volumeName string) (err error) {
var (
defaultPhysicalContainerLayout *physicalContainerLayoutStruct
defaultPhysicalContainerLayoutName string
defaultPhysicalContainerLayoutSectionName string
ok bool
volume *volumeStruct
volumeSectionName string
)
volumeSectionName = "Volume:" + volumeName
globals.Lock()
volume, ok = globals.volumeMap[volumeName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.ServeVolume() called for nonexistent Volume (%s)", volumeName)
return
}
if volume.served {
globals.Unlock()
err = fmt.Errorf("inode.ServeVolume() called for Volume (%s) already being served", volumeName)
return
}
volume.maxEntriesPerDirNode, err = confMap.FetchOptionValueUint64(volumeSectionName, "MaxEntriesPerDirNode")
if nil != err {
globals.Unlock()
return
}
volume.maxExtentsPerFileNode, err = confMap.FetchOptionValueUint64(volumeSectionName, "MaxExtentsPerFileNode")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayoutName, err = confMap.FetchOptionValueString(volumeSectionName, "DefaultPhysicalContainerLayout")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayout = &physicalContainerLayoutStruct{
name: defaultPhysicalContainerLayoutName,
containerNameSliceNextIndex: 0,
containerNameSliceLoopCount: 0,
}
defaultPhysicalContainerLayoutSectionName = "PhysicalContainerLayout:" + defaultPhysicalContainerLayoutName
defaultPhysicalContainerLayout.containerStoragePolicy, err = confMap.FetchOptionValueString(defaultPhysicalContainerLayoutSectionName, "ContainerStoragePolicy")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayout.containerNamePrefix, err = confMap.FetchOptionValueString(defaultPhysicalContainerLayoutSectionName, "ContainerNamePrefix")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayout.containersPerPeer, err = confMap.FetchOptionValueUint64(defaultPhysicalContainerLayoutSectionName, "ContainersPerPeer")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayout.maxObjectsPerContainer, err = confMap.FetchOptionValueUint64(defaultPhysicalContainerLayoutSectionName, "MaxObjectsPerContainer")
if nil != err {
globals.Unlock()
return
}
defaultPhysicalContainerLayout.containerNameSlice = make([]string, defaultPhysicalContainerLayout.containersPerPeer)
volume.defaultPhysicalContainerLayout = defaultPhysicalContainerLayout
volume.maxFlushSize, err = confMap.FetchOptionValueUint64(volumeSectionName, "MaxFlushSize")
if nil != err {
globals.Unlock()
return
}
volume.headhunterVolumeHandle, err = headhunter.FetchVolumeHandle(volume.volumeName)
if nil != err {
globals.Unlock()
return
}
volume.headhunterVolumeHandle.RegisterForEvents(volume)
volume.inodeCache = sortedmap.NewLLRBTree(compareInodeNumber, volume)
volume.inodeCacheStopChan = make(chan struct{}, 0)
volume.inodeCacheLRUHead = nil
volume.inodeCacheLRUTail = nil
volume.inodeCacheLRUItems = 0
err = startInodeCacheDiscard(confMap, volume, volumeSectionName)
if nil != err {
globals.Unlock()
return
}
volume.volumeGroup.Lock()
volume.served = true
volume.volumeGroup.numServed++
// temporary value until we can look across all volume groups to compute it
volume.volumeGroup.readCacheLineCount = 1
volume.volumeGroup.Unlock()
globals.Unlock()
return
}
func (dummy *globalsStruct) UnserveVolume(confMap conf.ConfMap, volumeName string) (err error) {
var (
ok bool
volume *volumeStruct
)
globals.Lock()
volume, ok = globals.volumeMap[volumeName]
if !ok {
globals.Unlock()
err = fmt.Errorf("inode.UnserveVolume() called for nonexistent Volume (%s)", volumeName)
return
}
if !volume.served {
globals.Unlock()
err = fmt.Errorf("inode.UnserveVolume() called for Volume (%s) not being served", volumeName)
return
}
stopInodeCacheDiscard(volume)
volume.inodeCache = nil
volume.inodeCacheStopChan = nil
volume.inodeCacheLRUHead = nil
volume.inodeCacheLRUTail = nil
volume.inodeCacheLRUItems = 0
volume.headhunterVolumeHandle.UnregisterForEvents(volume)
volume.volumeGroup.Lock()
volume.served = false
volume.volumeGroup.numServed--
volume.volumeGroup.Unlock()
globals.Unlock()
return
}
func (dummy *globalsStruct) VolumeToBeUnserved(confMap conf.ConfMap, volumeName string) (err error) {
err = nil
return
}
func (dummy *globalsStruct) SignaledStart(confMap conf.ConfMap) (err error) {
var (
volume *volumeStruct
)
for _, volume = range globals.volumeMap {
if volume.served && (nil != volume.snapShotPolicy) {
volume.snapShotPolicy.down()
volume.snapShotPolicy = nil
}
}
err = nil
return
}
func (dummy *globalsStruct) SignaledFinish(confMap conf.ConfMap) (err error) {
var (
swiftReconNoWriteErrno string
swiftReconReadOnlyErrno string
volume *volumeStruct
)
// now that the information for all volume groups is available, compute
// the read cache size per volume group
err = adoptVolumeGroupReadCacheParameters(confMap)
if err != nil {
// fatal
return
}
swiftReconNoWriteErrno, err = confMap.FetchOptionValueString("SwiftClient", "SwiftReconNoWriteErrno")
if nil == err {
switch swiftReconNoWriteErrno {
case "EPERM":
globals.noWriteThresholdErrno = blunder.NotPermError
globals.noWriteThresholdErrnoString = "EPERM"
case "EROFS":
globals.noWriteThresholdErrno = blunder.ReadOnlyError
globals.noWriteThresholdErrnoString = "EROFS"
case "ENOSPC":
globals.noWriteThresholdErrno = blunder.NoSpaceError
globals.noWriteThresholdErrnoString = "ENOSPC"
default:
err = fmt.Errorf("[SwiftClient]SwiftReconReadOnlyErrno must be either EPERM or EROFS or ENOSPC")
return
}
} else {
logger.WarnfWithError(err, "Unable to fetch [SwiftClient]SwiftReconNoWriteErrno... defaulting to %s", defaultNoWriteErrno)
globals.noWriteThresholdErrno = defaultNoWriteErrno
globals.noWriteThresholdErrnoString = defaultNoWriteErrnoString
}
swiftReconReadOnlyErrno, err = confMap.FetchOptionValueString("SwiftClient", "SwiftReconReadOnlyErrno")
if nil == err {
switch swiftReconReadOnlyErrno {
case "EPERM":
globals.readOnlyThresholdErrno = blunder.NotPermError
globals.readOnlyThresholdErrnoString = "EPERM"
case "EROFS":
globals.readOnlyThresholdErrno = blunder.ReadOnlyError
globals.readOnlyThresholdErrnoString = "EROFS"
case "ENOSPC":
globals.readOnlyThresholdErrno = blunder.NoSpaceError
globals.readOnlyThresholdErrnoString = "ENOSPC"
default:
err = fmt.Errorf("[SwiftClient]SwiftReconReadOnlyErrno must be either EPERM or EROFS or ENOSPC")
return
}
} else {
logger.WarnfWithError(err, "Unable to fetch [SwiftClient]SwiftReconReadOnlyErrno... defaulting to %s", defaultReadOnlyErrno)
globals.readOnlyThresholdErrno = defaultReadOnlyErrno
globals.readOnlyThresholdErrnoString = defaultReadOnlyErrnoString
}
for _, volume = range globals.volumeMap {
if volume.served {
err = volume.loadSnapShotPolicy(confMap)
if nil != err {
return
}
if nil != volume.snapShotPolicy {
volume.snapShotPolicy.up()
}
}
}
err = nil
return
}
func (dummy *globalsStruct) Down(confMap conf.ConfMap) (err error) {
if 0 != len(globals.volumeGroupMap) {
err = fmt.Errorf("inode.Down() called with 0 != len(globals.volumeGroupMap")
return
}
if 0 != len(globals.volumeMap) {
err = fmt.Errorf("inode.Down() called with 0 != len(globals.volumeMap")
return
}
err = nil
return
}