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8bfd35db0b
block_submit_bio will return -ENOLINK if called during a forced shutdown, the bio is never submitted, and thus no completion callback will fire to set BLOCK_BIT_ERROR. Any other task waiting for this specific bp will end up waiting forever. To fix, fall through to the existing block_end_io call on the error path instead of returning directly. That means moving the forcing_unmount check past the setup calls so block_end_io's bookkeeping stays balanced. block_end_io then sets BLOCK_BIT_ERROR and wakes up waiters just as it would on a failed async completion. 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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