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During normal unmount, lock_invalidate_worker can hang in scoutfs_trans_sync(sb, 1) because the trans commit path may return network errors that cause an infinite retry loop. Skip full lock_invalidate() during shutdown and unmount, and extract lock_clear_coverage() to still clean up coverage items in those paths and in scoutfs_lock_destroy(). Without this, coverage items can remain attached to locks being freed. Signed-off-by: Auke Kok <auke.kok@versity.com>
Introduction
scoutfs is a clustered in-kernel Linux filesystem designed to support large archival systems. It features additional interfaces and metadata so that archive agents can perform their maintenance workflows without walking all the files in the namespace. Its cluster support lets deployments add nodes to satisfy archival tier bandwidth targets.
The design goal is to reach file populations in the trillions, with the archival bandwidth to match, while remaining operational and responsive.
Highlights of the design and implementation include:
- Fully consistent POSIX semantics between nodes
- Atomic transactions to maintain consistent persistent structures
- Integrated archival metadata replaces syncing to external databases
- Dynamic seperation of resources lets nodes write in parallel
- 64bit throughout; no limits on file or directory sizes or counts
- Open GPLv2 implementation
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