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Block cloning introduced a new state transition from DB_NOFILL to DB_READ. This occurs when a block is cloned and then read on the current txg. In this case, the clone will move the dbuf to DB_NOFILL, and then the read will be issued for the overidden block pointer. If that read is still outstanding when it comes time to write, the dbuf will be in DB_READ, which is not handled by the checks in dbuf_sync_leaf, thus tripping the assertions. This updates those checks to allow DB_READ as a valid state iff the dirty record is for a BRT write and there is a override block pointer. This is a safe situation because the block already exists, so there's nothing that could change from underneath the read. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Kay Pedersen <mail@mkwg.de> Signed-off-by: Rob Norris <rob.norris@klarasystems.com> Original-patch-by: Kay Pedersen <mail@mkwg.de> Sponsored-By: OpenDrives Inc. Sponsored-By: Klara Inc. Closes #15050 |
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