mirror of https://github.com/restic/restic.git
Cache known snapshots instead of re-traversing the repository every time
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c9b3eebc09
commit
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@ -75,7 +75,10 @@ func (cmd CmdMount) Execute(args []string) error {
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}
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}
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root := fs.Tree{}
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root := fs.Tree{}
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root.Add("snapshots", &snapshots{repo})
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root.Add("snapshots", &snapshots{
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repo: repo,
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knownSnapshots: make(map[string]*restic.Snapshot),
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})
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cmd.global.Printf("Now serving %s under %s\n", repo.Backend().Location(), mountpoint)
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cmd.global.Printf("Now serving %s under %s\n", repo.Backend().Location(), mountpoint)
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cmd.global.Printf("Don't forget to umount after quitting !\n")
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cmd.global.Printf("Don't forget to umount after quitting !\n")
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@ -96,6 +99,9 @@ var _ = fs.NodeStringLookuper(&snapshots{})
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type snapshots struct {
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type snapshots struct {
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repo *repository.Repository
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repo *repository.Repository
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// snapshot timestamp -> snapshot
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knownSnapshots map[string]*restic.Snapshot
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}
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}
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func (sn *snapshots) Attr(ctx context.Context, a *fuse.Attr) error {
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func (sn *snapshots) Attr(ctx context.Context, a *fuse.Attr) error {
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@ -111,6 +117,7 @@ func (sn *snapshots) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
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if err != nil {
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if err != nil {
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return nil, err
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return nil, err
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}
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}
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sn.knownSnapshots[snapshot.Time.Format(time.RFC3339)] = snapshot
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ret = append(ret, fuse.Dirent{
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ret = append(ret, fuse.Dirent{
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Inode: binary.BigEndian.Uint64(id[:8]),
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Inode: binary.BigEndian.Uint64(id[:8]),
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Type: fuse.DT_Dir,
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Type: fuse.DT_Dir,
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@ -122,24 +129,29 @@ func (sn *snapshots) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
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}
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}
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func (sn *snapshots) Lookup(ctx context.Context, name string) (fs.Node, error) {
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func (sn *snapshots) Lookup(ctx context.Context, name string) (fs.Node, error) {
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// This is kind of lame: we reload each snapshot and check the name
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if _, ok := sn.knownSnapshots[name]; !ok {
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// (which is the timestamp)
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// At least this snapshot is not cached. We use this opportunity to
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for id := range sn.repo.List(backend.Snapshot, ctx.Done()) {
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// load all missing snapshots
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snapshot, err := restic.LoadSnapshot(sn.repo, id)
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for id := range sn.repo.List(backend.Snapshot, ctx.Done()) {
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if err != nil {
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snapshot, err := restic.LoadSnapshot(sn.repo, id)
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return nil, err
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}
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if snapshot.Time.Format(time.RFC3339) == name {
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tree, err := restic.LoadTree(sn.repo, snapshot.Tree)
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if err != nil {
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if err != nil {
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return nil, err
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return nil, err
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}
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}
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return &dir{
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snapshotName := snapshot.Time.Format(time.RFC3339)
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repo: sn.repo,
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sn.knownSnapshots[snapshotName] = snapshot
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tree: tree,
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break
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}, nil
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}
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}
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}
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}
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snapshot := sn.knownSnapshots[name]
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tree, err := restic.LoadTree(sn.repo, snapshot.Tree)
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if err != nil {
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return nil, err
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}
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return &dir{
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repo: sn.repo,
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tree: tree,
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}, nil
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return nil, fuse.ENOENT
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return nil, fuse.ENOENT
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}
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}
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