73aac4aa41
Check in the DMU whether an object record in a send stream being received contains an unsupported dnode slot count, and return an error if it does. Failure to catch an unsupported dnode slot count would result in a panic when the SPA attempts to increment the reference count for the large_dnode feature and the pool has the feature disabled. This is not normally an issue for a well-formed send stream which would have the DMU_BACKUP_FEATURE_LARGE_DNODE flag set if it contains large dnodes, so it will be rejected as unsupported if the required feature is disabled. This change adds a missing object record field validation. Add missing stream feature flag checks in dmu_recv_resume_begin_check(). Consolidate repetitive comment blocks in dmu_recv_begin_check(). Update zstreamdump to print the dnode slot count (dn_slots) for an object record when running in verbose mode. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Signed-off-by: Ned Bass <bass6@llnl.gov> Closes #6396
ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers. And it's native!
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