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adfe87422f
Add unmounting checks to lock_wait_cond() and lock_key_range() so that lock waiters wake up and new lock requests fail with -ESHUTDOWN during unmount. Replace the unbounded wait_event() with a 60 second timeout to prevent indefinite hangs. Relax the WARN_ON_ONCE at lock_key_range entry to only warn when not unmounting, since late lock attempts during shutdown are expected. 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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