Merge pull request #1507 from restic/fix-fuse-list-timeout

fuse: Only reload list of snapshots once per minute

changelog/0.8.2/pull-1507

@@ -0,0 +1,3 @@
+Enhancement: Only reload snapshots once per minute for fuse mount
+
+https://github.com/restic/restic/pull/1507

changelog/releases

@@ -3,6 +3,7 @@
 # 
 # The resulting changelog generated by `calens` will list all versions in
 # exactly this order.
+0.8.2
 0.8.1 2017-12-27
 0.8.0 2017-11-26
 0.7.3 2017-09-20

internal/fuse/root.go

@@ -4,6 +4,8 @@
 package fuse
 
 import (
+	"time"
+
 	"github.com/restic/restic/internal/debug"
 	"github.com/restic/restic/internal/restic"
 
@@ -27,7 +29,9 @@ type Root struct {
 	inode         uint64
 	snapshots     restic.Snapshots
 	blobSizeCache *BlobSizeCache
-	snCount       int
+
+	snCount   int
+	lastCheck time.Time
 
 	*MetaDir
 }

internal/fuse/snapshots_dir.go

@@ -221,14 +221,21 @@ func isElem(e string, list []string) bool {
 	return false
 }
 
+const minSnapshotsReloadTime = 60 * time.Second
+
 // update snapshots if repository has changed
 func updateSnapshots(ctx context.Context, root *Root) {
+	if time.Since(root.lastCheck) < minSnapshotsReloadTime {
+		return
+	}
+
 	snapshots := restic.FindFilteredSnapshots(ctx, root.repo, root.cfg.Host, root.cfg.Tags, root.cfg.Paths)
 	if root.snCount != len(snapshots) {
 		root.snCount = len(snapshots)
 		root.repo.LoadIndex(ctx)
 		root.snapshots = snapshots
 	}
+	root.lastCheck = time.Now()
 }
 
 // read snapshot timestamps from the current repository-state.