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fuse: reset treeCache on snapshot reload to fix stale latest symlink (#21873)

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The treeCache in SnapshotsDir was never cleared when snapshots were
reloaded. This caused the "latest" symlink to keep pointing to the
previous snapshot even after new snapshots were added.

Add a generation counter to SnapshotsDirStructure that is incremented
whenever the directory structure is rebuilt (in makeDirs). The
treeCache checks this generation on each lookup and resets itself
when the generation changes, ensuring cached nodes (including symlinks)
are refreshed after a snapshot reload.
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Ricardo Sawir authored and Michael Eischer committed 2026-06-23 19:26:29 +02:00
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commit 32be2e559b
7 files changed
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changelog/unreleased/issue-5722
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Bugfix: Update `mount` latest symlink after snapshot reload
When `restic mount` was kept running while new snapshots were
created, the new snapshots appeared in the mountpoint, but the `latest`
symlink could still point to the previously latest snapshot. Restic now
invalidates the cached snapshot directory entries after a snapshot reload so
that `latest` points to the newest snapshot.
https://github.com/restic/restic/issues/5722
https://github.com/restic/restic/pull/21873