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Code Issues Releases Wiki Activity

Merge pull request #625 from restic/fix-624

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fuse: correctly handle snapshots
This commit is contained in:
Alexander Neumann 2016-09-18 15:35:50 +02:00
commit 7b3e319398
1 changed files with 13 additions and 6 deletions
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19
src/restic/fuse/snapshot.go
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@ -36,6 +36,7 @@ type SnapshotsDir struct {
// knownSnapshots maps snapshot timestamp to the snapshot
sync.RWMutex
knownSnapshots map[string]SnapshotWithId
processed restic.IDSet
}
// NewSnapshotsDir returns a new dir object for the snapshots.
@ -45,6 +46,7 @@ func NewSnapshotsDir(repo restic.Repository, ownerIsRoot bool) *SnapshotsDir {
repo: repo,
knownSnapshots: make(map[string]SnapshotWithId),
ownerIsRoot: ownerIsRoot,
processed: restic.NewIDSet(),
}
}
@ -66,6 +68,11 @@ func (sn *SnapshotsDir) updateCache(ctx context.Context) error {
defer sn.Unlock()
for id := range sn.repo.List(restic.SnapshotFile, ctx.Done()) {
if sn.processed.Has(id) {
debug.Log("SnapshotsDir.List", "skipping snapshot %v, already in list", id.Str())
continue
}
debug.Log("SnapshotsDir.List", "found snapshot id %v", id.Str())
snapshot, err := restic.LoadSnapshot(sn.repo, id)
if err != nil {
@ -73,7 +80,6 @@ func (sn *SnapshotsDir) updateCache(ctx context.Context) error {
}
timestamp := snapshot.Time.Format(time.RFC3339)
for i := 1; ; i++ {
if _, ok := sn.knownSnapshots[timestamp]; !ok {
break
@ -84,6 +90,7 @@ func (sn *SnapshotsDir) updateCache(ctx context.Context) error {
debug.Log("SnapshotsDir.List", " add %v as dir %v", id.Str(), timestamp)
sn.knownSnapshots[timestamp] = SnapshotWithId{snapshot, id}
sn.processed.Insert(id)
}
return nil
}
@ -107,11 +114,11 @@ func (sn *SnapshotsDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
defer sn.RUnlock()
ret := make([]fuse.Dirent, 0)
for _, snapshot := range sn.knownSnapshots {
for timestamp, snapshot := range sn.knownSnapshots {
ret = append(ret, fuse.Dirent{
Inode: inodeFromBackendID(snapshot.ID),
Type: fuse.DT_Dir,
Name: snapshot.Time.Format(time.RFC3339),
Name: timestamp,
})
}
@ -120,20 +127,20 @@ func (sn *SnapshotsDir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
}
func (sn *SnapshotsDir) Lookup(ctx context.Context, name string) (fs.Node, error) {
debug.Log("SnapshotsDir.updateCache", "Lookup(%s)", name)
debug.Log("SnapshotsDir.Lookup", "Lookup(%s)", name)
snapshot, ok := sn.get(name)
if !ok {
// We don't know about it, update the cache
err := sn.updateCache(ctx)
if err != nil {
debug.Log("SnapshotsDir.updateCache", " Lookup(%s) -> err %v", name, err)
debug.Log("SnapshotsDir.Lookup", " Lookup(%s) -> err %v", name, err)
return nil, err
}
snapshot, ok = sn.get(name)
if !ok {
// We still don't know about it, this time it really doesn't exist
debug.Log("SnapshotsDir.updateCache", " Lookup(%s) -> not found", name)
debug.Log("SnapshotsDir.Lookup", " Lookup(%s) -> not found", name)
return nil, fuse.ENOENT
}
}