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mdserver_memory.go
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mdserver_memory.go
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// Copyright 2016 Keybase Inc. All rights reserved.
// Use of this source code is governed by a BSD
// license that can be found in the LICENSE file.
package libkbfs
import (
"reflect"
"sync"
"time"
"github.com/keybase/client/go/kbfs/kbfscrypto"
"github.com/keybase/client/go/kbfs/kbfsmd"
"github.com/keybase/client/go/kbfs/tlf"
"github.com/keybase/client/go/logger"
"github.com/keybase/client/go/protocol/keybase1"
"github.com/pkg/errors"
"golang.org/x/net/context"
)
// An mdHandleKey is an encoded tlf.Handle.
type mdHandleKey string
type mdBlockKey struct {
tlfID tlf.ID
branchID kbfsmd.BranchID
}
type mdBranchKey struct {
tlfID tlf.ID
deviceKey kbfscrypto.CryptPublicKey
}
type mdExtraWriterKey struct {
tlfID tlf.ID
writerBundleID kbfsmd.TLFWriterKeyBundleID
}
type mdExtraReaderKey struct {
tlfID tlf.ID
readerBundleID kbfsmd.TLFReaderKeyBundleID
}
type mdBlockMem struct {
// An encoded RootMetdataSigned.
encodedMd []byte
timestamp time.Time
version kbfsmd.MetadataVer
}
type mdBlockMemList struct {
initialRevision kbfsmd.Revision
blocks []mdBlockMem
}
const mdLockTimeout = time.Minute
type mdLockMemKey struct {
tlfID tlf.ID
lockID keybase1.LockID
}
type mdLockMemVal struct {
etime time.Time
holder mdServerLocal
released chan struct{}
}
type mdServerMemShared struct {
// Protects all *db variables and truncateLockManager. After
// Shutdown() is called, all *db variables and
// truncateLockManager are nil.
lock sync.RWMutex // nolint
// Bare TLF handle -> TLF ID
handleDb map[mdHandleKey]tlf.ID
// TLF ID -> latest bare TLF handle
latestHandleDb map[tlf.ID]tlf.Handle
// (TLF ID, branch ID) -> list of MDs
mdDb map[mdBlockKey]mdBlockMemList
// Writer key bundle ID -> writer key bundles
writerKeyBundleDb map[mdExtraWriterKey]kbfsmd.TLFWriterKeyBundleV3
// Reader key bundle ID -> reader key bundles
readerKeyBundleDb map[mdExtraReaderKey]kbfsmd.TLFReaderKeyBundleV3
// (TLF ID, crypt public key) -> branch ID
branchDb map[mdBranchKey]kbfsmd.BranchID
truncateLockManager *mdServerLocalTruncateLockManager
// tracks expire time and holder
lockIDs map[mdLockMemKey]mdLockMemVal
implicitTeamsEnabled bool // nolint
iTeamMigrationLocks map[tlf.ID]bool
merkleRoots map[keybase1.MerkleTreeID]*kbfsmd.MerkleRoot
updateManager *mdServerLocalUpdateManager
}
// MDServerMemory just stores metadata objects in memory.
type MDServerMemory struct {
config mdServerLocalConfig
log logger.Logger
*mdServerMemShared
}
var _ mdServerLocal = (*MDServerMemory)(nil)
// NewMDServerMemory constructs a new MDServerMemory object that stores
// all data in-memory.
func NewMDServerMemory(config mdServerLocalConfig) (*MDServerMemory, error) {
handleDb := make(map[mdHandleKey]tlf.ID)
latestHandleDb := make(map[tlf.ID]tlf.Handle)
mdDb := make(map[mdBlockKey]mdBlockMemList)
branchDb := make(map[mdBranchKey]kbfsmd.BranchID)
writerKeyBundleDb := make(map[mdExtraWriterKey]kbfsmd.TLFWriterKeyBundleV3)
readerKeyBundleDb := make(map[mdExtraReaderKey]kbfsmd.TLFReaderKeyBundleV3)
log := config.MakeLogger("MDSM")
truncateLockManager := newMDServerLocalTruncatedLockManager()
shared := mdServerMemShared{
handleDb: handleDb,
latestHandleDb: latestHandleDb,
mdDb: mdDb,
branchDb: branchDb,
writerKeyBundleDb: writerKeyBundleDb,
readerKeyBundleDb: readerKeyBundleDb,
truncateLockManager: &truncateLockManager,
lockIDs: make(map[mdLockMemKey]mdLockMemVal),
iTeamMigrationLocks: make(map[tlf.ID]bool),
updateManager: newMDServerLocalUpdateManager(),
merkleRoots: make(map[keybase1.MerkleTreeID]*kbfsmd.MerkleRoot),
}
mdserv := &MDServerMemory{config, log, &shared}
return mdserv, nil
}
type errMDServerMemoryShutdown struct{}
func (e errMDServerMemoryShutdown) Error() string {
return "MDServerMemory is shutdown"
}
func (md *MDServerMemory) checkShutdownRLocked() error {
if md.handleDb == nil {
return errors.WithStack(errMDServerMemoryShutdown{})
}
return nil
}
func (md *MDServerMemory) enableImplicitTeams() {
md.lock.Lock()
defer md.lock.Unlock()
md.implicitTeamsEnabled = true
}
func (md *MDServerMemory) setKbfsMerkleRoot(
treeID keybase1.MerkleTreeID, root *kbfsmd.MerkleRoot) {
md.lock.Lock()
defer md.lock.Unlock()
md.merkleRoots[treeID] = root
}
func (md *MDServerMemory) getHandleID(ctx context.Context, handle tlf.Handle,
mStatus kbfsmd.MergeStatus) (tlfID tlf.ID, created bool, err error) {
handleBytes, err := md.config.Codec().Encode(handle)
if err != nil {
return tlf.NullID, false, kbfsmd.ServerError{Err: err}
}
md.lock.RLock()
defer md.lock.RUnlock()
err = md.checkShutdownRLocked()
if err != nil {
return tlf.NullID, false, err
}
id, ok := md.handleDb[mdHandleKey(handleBytes)]
if ok {
return id, false, nil
}
// Non-readers shouldn't be able to create the dir.
session, err := md.config.currentSessionGetter().GetCurrentSession(ctx)
if err != nil {
return tlf.NullID, false, kbfsmd.ServerError{Err: err}
}
if handle.Type() == tlf.SingleTeam {
isReader, err := md.config.teamMembershipChecker().IsTeamReader(
ctx, handle.Writers[0].AsTeamOrBust(), session.UID,
keybase1.OfflineAvailability_NONE)
if err != nil {
return tlf.NullID, false, kbfsmd.ServerError{Err: err}
}
if !isReader {
return tlf.NullID, false, errors.WithStack(
kbfsmd.ServerErrorUnauthorized{})
}
} else if !handle.IsReader(session.UID.AsUserOrTeam()) {
return tlf.NullID, false, errors.WithStack(
kbfsmd.ServerErrorUnauthorized{})
}
if md.implicitTeamsEnabled {
return tlf.NullID, false, kbfsmd.ServerErrorClassicTLFDoesNotExist{}
}
// Allocate a new random ID.
id, err = md.config.cryptoPure().MakeRandomTlfID(handle.Type())
if err != nil {
return tlf.NullID, false, kbfsmd.ServerError{Err: err}
}
md.handleDb[mdHandleKey(handleBytes)] = id
md.latestHandleDb[id] = handle
return id, true, nil
}
// GetForHandle implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) GetForHandle(ctx context.Context, handle tlf.Handle,
mStatus kbfsmd.MergeStatus, _ *keybase1.LockID) (
tlf.ID, *RootMetadataSigned, error) {
if err := checkContext(ctx); err != nil {
return tlf.NullID, nil, err
}
id, created, err := md.getHandleID(ctx, handle, mStatus)
if err != nil {
return tlf.NullID, nil, err
}
if created {
return id, nil, nil
}
rmds, err := md.GetForTLF(ctx, id, kbfsmd.NullBranchID, mStatus, nil)
if err != nil {
return tlf.NullID, nil, err
}
return id, rmds, nil
}
func (md *MDServerMemory) checkGetParamsRLocked(
ctx context.Context, id tlf.ID, bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus) (
newBid kbfsmd.BranchID, err error) {
if mStatus == kbfsmd.Merged && bid != kbfsmd.NullBranchID {
return kbfsmd.NullBranchID, kbfsmd.ServerErrorBadRequest{Reason: "Invalid branch ID"}
}
// Check permissions
mergedMasterHead, err :=
md.getHeadForTLFRLocked(ctx, id, kbfsmd.NullBranchID, kbfsmd.Merged)
if err != nil {
return kbfsmd.NullBranchID, kbfsmd.ServerError{Err: err}
}
session, err := md.config.currentSessionGetter().GetCurrentSession(ctx)
if err != nil {
return kbfsmd.NullBranchID, kbfsmd.ServerError{Err: err}
}
// TODO: Figure out nil case.
if mergedMasterHead != nil {
extra, err := getExtraMetadata(
md.getKeyBundlesRLocked, mergedMasterHead.MD)
if err != nil {
return kbfsmd.NullBranchID, kbfsmd.ServerError{Err: err}
}
ok, err := isReader(ctx, md.config.teamMembershipChecker(), session.UID,
mergedMasterHead.MD, extra)
if err != nil {
return kbfsmd.NullBranchID, kbfsmd.ServerError{Err: err}
}
if !ok {
return kbfsmd.NullBranchID, errors.WithStack(
kbfsmd.ServerErrorUnauthorized{})
}
}
// Lookup the branch ID if not supplied
if mStatus == kbfsmd.Unmerged && bid == kbfsmd.NullBranchID {
return md.getBranchIDRLocked(ctx, id)
}
return bid, nil
}
// GetForTLF implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) GetForTLF(ctx context.Context, id tlf.ID,
bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus, _ *keybase1.LockID) (
*RootMetadataSigned, error) {
if err := checkContext(ctx); err != nil {
return nil, err
}
md.lock.RLock()
defer md.lock.RUnlock()
bid, err := md.checkGetParamsRLocked(ctx, id, bid, mStatus)
if err != nil {
return nil, err
}
if mStatus == kbfsmd.Unmerged && bid == kbfsmd.NullBranchID {
return nil, nil
}
rmds, err := md.getHeadForTLFRLocked(ctx, id, bid, mStatus)
if err != nil {
return nil, kbfsmd.ServerError{Err: err}
}
return rmds, nil
}
// GetForTLFByTime implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) GetForTLFByTime(
ctx context.Context, id tlf.ID, serverTime time.Time) (
*RootMetadataSigned, error) {
if err := checkContext(ctx); err != nil {
return nil, err
}
md.lock.RLock()
defer md.lock.RUnlock()
key, err := md.getMDKey(id, kbfsmd.NullBranchID, kbfsmd.Merged)
if err != nil {
return nil, err
}
err = md.checkShutdownRLocked()
if err != nil {
return nil, err
}
blockList, ok := md.mdDb[key]
if !ok {
return nil, nil
}
blocks := blockList.blocks
// Iterate backward until we find a timestamp less than `serverTime`.
for i := len(blocks) - 1; i >= 0; i-- {
t := blocks[i].timestamp
if t.After(serverTime) {
continue
}
max := md.config.MetadataVersion()
ver := blocks[i].version
buf := blocks[i].encodedMd
rmds, err := DecodeRootMetadataSigned(
md.config.Codec(), id, ver, max, buf, t)
if err != nil {
return nil, err
}
return rmds, nil
}
return nil, errors.Errorf(
"No MD found for TLF %s and serverTime %s", id, serverTime)
}
func (md *MDServerMemory) getHeadForTLFRLocked(ctx context.Context, id tlf.ID,
bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus) (*RootMetadataSigned, error) {
key, err := md.getMDKey(id, bid, mStatus)
if err != nil {
return nil, err
}
err = md.checkShutdownRLocked()
if err != nil {
return nil, err
}
blockList, ok := md.mdDb[key]
if !ok {
return nil, nil
}
blocks := blockList.blocks
max := md.config.MetadataVersion()
ver := blocks[len(blocks)-1].version
buf := blocks[len(blocks)-1].encodedMd
timestamp := blocks[len(blocks)-1].timestamp
rmds, err := DecodeRootMetadataSigned(
md.config.Codec(), id, ver, max, buf, timestamp)
if err != nil {
return nil, err
}
return rmds, nil
}
func (md *MDServerMemory) getMDKey(
id tlf.ID, bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus) (mdBlockKey, error) {
if (mStatus == kbfsmd.Merged) != (bid == kbfsmd.NullBranchID) {
return mdBlockKey{},
errors.Errorf("mstatus=%v is inconsistent with bid=%v",
mStatus, bid)
}
return mdBlockKey{id, bid}, nil
}
func (md *MDServerMemory) getBranchKey(ctx context.Context, id tlf.ID) (
mdBranchKey, error) {
// add device key
deviceKey, err := md.getCurrentDeviceKey(ctx)
if err != nil {
return mdBranchKey{}, err
}
return mdBranchKey{id, deviceKey}, nil
}
func (md *MDServerMemory) getCurrentDeviceKey(ctx context.Context) (
kbfscrypto.CryptPublicKey, error) {
session, err := md.config.currentSessionGetter().GetCurrentSession(ctx)
if err != nil {
return kbfscrypto.CryptPublicKey{}, err
}
return session.CryptPublicKey, nil
}
// GetRange implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) getRangeLocked(ctx context.Context, id tlf.ID,
bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus, start, stop kbfsmd.Revision,
lockBeforeGet *keybase1.LockID) (
rmdses []*RootMetadataSigned, lockWaitCh <-chan struct{}, err error) {
md.log.CDebugf(ctx, "GetRange %d %d (%s)", start, stop, mStatus)
bid, err = md.checkGetParamsRLocked(ctx, id, bid, mStatus)
if err != nil {
return nil, nil, err
}
if lockBeforeGet != nil {
lockWaitCh = md.lockLocked(ctx, id, *lockBeforeGet)
if lockWaitCh != nil {
return nil, lockWaitCh, nil
}
defer func() {
if err != nil {
md.releaseLockLocked(ctx, id, *lockBeforeGet)
}
}()
}
if mStatus == kbfsmd.Unmerged && bid == kbfsmd.NullBranchID {
return nil, nil, nil
}
key, err := md.getMDKey(id, bid, mStatus)
if err != nil {
return nil, nil, kbfsmd.ServerError{Err: err}
}
err = md.checkShutdownRLocked()
if err != nil {
return nil, nil, err
}
blockList, ok := md.mdDb[key]
if !ok {
return nil, nil, nil
}
startI := int(start - blockList.initialRevision)
if startI < 0 {
startI = 0
}
endI := int(stop - blockList.initialRevision + 1)
blocks := blockList.blocks
if endI > len(blocks) {
endI = len(blocks)
}
max := md.config.MetadataVersion()
for i := startI; i < endI; i++ {
ver := blocks[i].version
buf := blocks[i].encodedMd
rmds, err := DecodeRootMetadataSigned(
md.config.Codec(), id, ver, max, buf,
blocks[i].timestamp)
if err != nil {
return nil, nil, kbfsmd.ServerError{Err: err}
}
expectedRevision := blockList.initialRevision + kbfsmd.Revision(i)
if expectedRevision != rmds.MD.RevisionNumber() {
panic(errors.Errorf("expected revision %v, got %v",
expectedRevision, rmds.MD.RevisionNumber()))
}
rmdses = append(rmdses, rmds)
}
return rmdses, nil, nil
}
func (md *MDServerMemory) doGetRange(ctx context.Context, id tlf.ID,
bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus, start, stop kbfsmd.Revision,
lockBeforeGet *keybase1.LockID) (
[]*RootMetadataSigned, <-chan struct{}, error) {
md.lock.Lock()
defer md.lock.Unlock()
return md.getRangeLocked(ctx, id, bid, mStatus, start, stop, lockBeforeGet)
}
// GetRange implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) GetRange(ctx context.Context, id tlf.ID,
bid kbfsmd.BranchID, mStatus kbfsmd.MergeStatus, start, stop kbfsmd.Revision,
lockBeforeGet *keybase1.LockID) ([]*RootMetadataSigned, error) {
if err := checkContext(ctx); err != nil {
return nil, err
}
// An RPC-based client would receive a throttle message from the
// server and retry with backoff, but here we need to implement
// the retry logic explicitly.
for {
rmds, ch, err := md.doGetRange(
ctx, id, bid, mStatus, start, stop, lockBeforeGet)
if err != nil {
return nil, err
}
if ch == nil {
return rmds, err
}
select {
// TODO: wait for the clock to pass the expired time. We'd
// need a new method in the `Clock` interface to support this.
case <-ch:
continue
case <-ctx.Done():
return nil, ctx.Err()
}
}
}
// Put implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) Put(ctx context.Context, rmds *RootMetadataSigned,
extra kbfsmd.ExtraMetadata, lc *keybase1.LockContext, _ keybase1.MDPriority) error {
if err := checkContext(ctx); err != nil {
return err
}
session, err := md.config.currentSessionGetter().GetCurrentSession(ctx)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
err = rmds.IsValidAndSigned(
ctx, md.config.Codec(), md.config.teamMembershipChecker(), extra,
keybase1.OfflineAvailability_NONE)
if err != nil {
return kbfsmd.ServerErrorBadRequest{Reason: err.Error()}
}
err = rmds.IsLastModifiedBy(session.UID, session.VerifyingKey)
if err != nil {
return kbfsmd.ServerErrorBadRequest{Reason: err.Error()}
}
id := rmds.MD.TlfID()
// Check permissions
md.lock.Lock()
defer md.lock.Unlock()
if lc != nil && !md.isLockedLocked(ctx, id, lc.RequireLockID) {
return kbfsmd.ServerErrorLockConflict{}
}
mergedMasterHead, err :=
md.getHeadForTLFRLocked(ctx, id, kbfsmd.NullBranchID, kbfsmd.Merged)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
// TODO: Figure out nil case.
if mergedMasterHead != nil {
prevExtra, err := getExtraMetadata(
md.getKeyBundlesRLocked, mergedMasterHead.MD)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
ok, err := isWriterOrValidRekey(
ctx, md.config.teamMembershipChecker(), md.config.Codec(),
session.UID, session.VerifyingKey, mergedMasterHead.MD,
rmds.MD, prevExtra, extra)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
if !ok {
return errors.WithStack(kbfsmd.ServerErrorUnauthorized{})
}
}
bid := rmds.MD.BID()
mStatus := rmds.MD.MergedStatus()
head, err := md.getHeadForTLFRLocked(ctx, id, bid, mStatus)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
var recordBranchID bool
if mStatus == kbfsmd.Unmerged && head == nil {
// currHead for unmerged history might be on the main branch
prevRev := rmds.MD.RevisionNumber() - 1
rmdses, ch, err := md.getRangeLocked(
ctx, id, kbfsmd.NullBranchID, kbfsmd.Merged, prevRev, prevRev, nil)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
if ch != nil {
panic("Got non-nil lock channel with a nil lock context")
}
if len(rmdses) != 1 {
return kbfsmd.ServerError{
Err: errors.Errorf("Expected 1 MD block got %d", len(rmdses)),
}
}
head = rmdses[0]
recordBranchID = true
}
// Consistency checks
if head != nil {
id, err := kbfsmd.MakeID(md.config.Codec(), head.MD)
if err != nil {
return err
}
err = head.MD.CheckValidSuccessorForServer(id, rmds.MD)
if err != nil {
return err
}
}
// Record branch ID
if recordBranchID {
branchKey, err := md.getBranchKey(ctx, id)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
err = md.checkShutdownRLocked()
if err != nil {
return err
}
md.branchDb[branchKey] = bid
}
encodedMd, err := kbfsmd.EncodeRootMetadataSigned(md.config.Codec(), &rmds.RootMetadataSigned)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
// Pretend the timestamp went over RPC, so we get the same
// resolution level as a real server.
t := keybase1.FromTime(keybase1.ToTime(md.config.Clock().Now()))
block := mdBlockMem{encodedMd, t, rmds.MD.Version()}
// Add an entry with the revision key.
revKey, err := md.getMDKey(id, bid, mStatus)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
err = md.checkShutdownRLocked()
if err != nil {
return err
}
blockList, ok := md.mdDb[revKey]
if ok {
blockList.blocks = append(blockList.blocks, block)
md.mdDb[revKey] = blockList
} else {
md.mdDb[revKey] = mdBlockMemList{
initialRevision: rmds.MD.RevisionNumber(),
blocks: []mdBlockMem{block},
}
}
if err := md.putExtraMetadataLocked(rmds, extra); err != nil {
return kbfsmd.ServerError{Err: err}
}
if lc != nil && lc.ReleaseAfterSuccess {
md.releaseLockLocked(ctx, id, lc.RequireLockID)
}
if mStatus == kbfsmd.Merged &&
// Don't send notifies if it's just a rekey (the real mdserver
// sends a "folder needs rekey" notification in this case).
!(rmds.MD.IsRekeySet() && rmds.MD.IsWriterMetadataCopiedSet()) {
md.updateManager.setHead(id, md)
}
return nil
}
func (md *MDServerMemory) isLockedLocked(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) bool {
val, ok := md.lockIDs[mdLockMemKey{
tlfID: tlfID,
lockID: lockID,
}]
if !ok {
return false
}
return val.etime.After(md.config.Clock().Now()) && md == val.holder
}
func (md *MDServerMemory) lockLocked(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) <-chan struct{} {
lockKey := mdLockMemKey{
tlfID: tlfID,
lockID: lockID,
}
val, ok := md.lockIDs[lockKey]
if !ok || !val.etime.After(md.config.Clock().Now()) {
// The lock doesn't exist or has expired.
md.lockIDs[lockKey] = mdLockMemVal{
etime: md.config.Clock().Now().Add(mdLockTimeout),
holder: md,
released: make(chan struct{}),
}
if ok {
close(val.released)
}
return nil
} else if val.holder == md {
// The lock is already held by this instance; just return
// without refreshing timestamp.
return nil
}
// Someone else holds the lock; the caller needs to release
// md.lock and wait for this channel to close.
return val.released
}
func (md *MDServerMemory) releaseLockLocked(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) {
lockKey := mdLockMemKey{
tlfID: tlfID,
lockID: lockID,
}
val, ok := md.lockIDs[lockKey]
if !ok || val.holder != md {
return
}
delete(md.lockIDs, lockKey)
close(val.released)
}
func (md *MDServerMemory) doLock(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) <-chan struct{} {
md.lock.Lock()
defer md.lock.Unlock()
return md.lockLocked(ctx, tlfID, lockID)
}
// Lock implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) Lock(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) error {
// An RPC-based client would receive a throttle message from the
// server and retry with backoff, but here we need to implement
// the retry logic explicitly.
for {
ch := md.doLock(ctx, tlfID, lockID)
if ch == nil {
return nil
}
select {
// TODO: wait for the clock to pass the expired time. We'd
// need a new method in the `Clock` interface to support this.
case <-ch:
continue
case <-ctx.Done():
return ctx.Err()
}
}
}
// ReleaseLock implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) ReleaseLock(ctx context.Context,
tlfID tlf.ID, lockID keybase1.LockID) error {
md.lock.Lock()
defer md.lock.Unlock()
md.releaseLockLocked(ctx, tlfID, lockID)
return nil
}
// StartImplicitTeamMigration implements the MDServer interface.
func (md *MDServerMemory) StartImplicitTeamMigration(
ctx context.Context, id tlf.ID) (err error) {
md.lock.Lock()
defer md.lock.Unlock()
md.iTeamMigrationLocks[id] = true
return nil
}
// PruneBranch implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) PruneBranch(ctx context.Context, id tlf.ID, bid kbfsmd.BranchID) error {
if err := checkContext(ctx); err != nil {
return err
}
if bid == kbfsmd.NullBranchID {
return kbfsmd.ServerErrorBadRequest{Reason: "Invalid branch ID"}
}
md.lock.Lock()
defer md.lock.Unlock()
currBID, err := md.getBranchIDRLocked(ctx, id)
if err != nil {
return err
}
if currBID == kbfsmd.NullBranchID || bid != currBID {
return kbfsmd.ServerErrorBadRequest{Reason: "Invalid branch ID"}
}
// Don't actually delete unmerged history. This is intentional to be consistent
// with the mdserver behavior-- it garbage collects discarded branches in the
// background.
branchKey, err := md.getBranchKey(ctx, id)
if err != nil {
return kbfsmd.ServerError{Err: err}
}
err = md.checkShutdownRLocked()
if err != nil {
return err
}
delete(md.branchDb, branchKey)
return nil
}
func (md *MDServerMemory) getBranchIDRLocked(ctx context.Context, id tlf.ID) (kbfsmd.BranchID, error) {
branchKey, err := md.getBranchKey(ctx, id)
if err != nil {
return kbfsmd.NullBranchID, kbfsmd.ServerError{Err: err}
}
err = md.checkShutdownRLocked()
if err != nil {
return kbfsmd.NullBranchID, err
}
bid, ok := md.branchDb[branchKey]
if !ok {
return kbfsmd.NullBranchID, nil
}
return bid, nil
}
// RegisterForUpdate implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) RegisterForUpdate(ctx context.Context, id tlf.ID,
currHead kbfsmd.Revision) (<-chan error, error) {
if err := checkContext(ctx); err != nil {
return nil, err
}
// are we already past this revision? If so, fire observer
// immediately
currMergedHeadRev, err := md.getCurrentMergedHeadRevision(ctx, id)
if err != nil {
return nil, err
}
c := md.updateManager.registerForUpdate(id, currHead, currMergedHeadRev, md)
return c, nil
}
// CancelRegistration implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) CancelRegistration(_ context.Context, id tlf.ID) {
md.updateManager.cancel(id, md)
}
// TruncateLock implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) TruncateLock(ctx context.Context, id tlf.ID) (
bool, error) {
if err := checkContext(ctx); err != nil {
return false, err
}
md.lock.Lock()
defer md.lock.Unlock()
err := md.checkShutdownRLocked()
if err != nil {
return false, err
}
myKey, err := md.getCurrentDeviceKey(ctx)
if err != nil {
return false, err
}
return md.truncateLockManager.truncateLock(myKey, id)
}
// TruncateUnlock implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) TruncateUnlock(ctx context.Context, id tlf.ID) (
bool, error) {
if err := checkContext(ctx); err != nil {
return false, err
}
md.lock.Lock()
defer md.lock.Unlock()
err := md.checkShutdownRLocked()
if err != nil {
return false, err
}
myKey, err := md.getCurrentDeviceKey(ctx)
if err != nil {
return false, err
}
return md.truncateLockManager.truncateUnlock(myKey, id)
}
// Shutdown implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) Shutdown() {
md.lock.Lock()
defer md.lock.Unlock()
md.handleDb = nil
md.latestHandleDb = nil
md.branchDb = nil
md.truncateLockManager = nil
}
// IsConnected implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) IsConnected() bool {
return !md.isShutdown()
}
// RefreshAuthToken implements the MDServer interface for MDServerMemory.
func (md *MDServerMemory) RefreshAuthToken(ctx context.Context) {}
// This should only be used for testing with an in-memory server.
func (md *MDServerMemory) copy(config mdServerLocalConfig) mdServerLocal {
// NOTE: observers and sessionHeads are copied shallowly on
// purpose, so that the MD server that gets a Put will notify all
// observers correctly no matter where they got on the list.
log := config.MakeLogger("")
return &MDServerMemory{config, log, md.mdServerMemShared}
}
// isShutdown returns whether the logical, shared MDServer instance
// has been shut down.
func (md *MDServerMemory) isShutdown() bool {
md.lock.RLock()
defer md.lock.RUnlock()
return md.checkShutdownRLocked() != nil
}
// DisableRekeyUpdatesForTesting implements the MDServer interface.
func (md *MDServerMemory) DisableRekeyUpdatesForTesting() {
// Nothing to do.
}
// CheckForRekeys implements the MDServer interface.
func (md *MDServerMemory) CheckForRekeys(ctx context.Context) <-chan error {
// Nothing to do
c := make(chan error, 1)
c <- nil
return c
}
func (md *MDServerMemory) addNewAssertionForTest(uid keybase1.UID,
newAssertion keybase1.SocialAssertion) error {
md.lock.Lock()
defer md.lock.Unlock()
err := md.checkShutdownRLocked()
if err != nil {
return err
}
// Iterate through all the handles, and add handles for ones
// containing newAssertion to now include the uid.
for hBytes, id := range md.handleDb {
var h tlf.Handle
err := md.config.Codec().Decode([]byte(hBytes), &h)
if err != nil {
return err
}
assertions := map[keybase1.SocialAssertion]keybase1.UID{
newAssertion: uid,
}
newH := h.ResolveAssertions(assertions)
if reflect.DeepEqual(h, newH) {
continue
}
newHBytes, err := md.config.Codec().Encode(newH)
if err != nil {
return err
}
md.handleDb[mdHandleKey(newHBytes)] = id
}
return nil
}
func (md *MDServerMemory) getCurrentMergedHeadRevision(
ctx context.Context, id tlf.ID) (rev kbfsmd.Revision, err error) {
head, err := md.GetForTLF(ctx, id, kbfsmd.NullBranchID, kbfsmd.Merged, nil)
if err != nil {