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Zach BrownandZach Brown
24cc5cc296
The manifest root request processing samples the stable_manifest_root in the server info. The stable_manifest_root is updated after a commit has suceeded. The read of stable_manifest_root in request processing was locking the manifest. The update during commit doesn't lock the manifest so these paths were racing. The race is very tight, a few cpu stores, but it could in theory give a client a malformed root that could be misinterpreted as corruption. Add a seqcount around the store of the stable manifest root during commit and its load during request processing. This ensures that clients always get a consistent manifest root. Signed-off-by: Zach Brown <zab@versity.com>