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bddca171ee
The final iput of an inode can delete items in cluster locked transactions. It was never safe to call iput within locked transactions but we never saw the problem. Recent work on inode deletion raised the issue again. This makes sure that we always perform iput outside of locked transactions. The only interesting change is making scoutfs_new_inode() return the allocated inode on error so that the caller can put the inode after releasing the transaction. Signed-off-by: Zach Brown <zab@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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