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5f5321effa
With the advent of fast dedup, there are no longer separate dedup tables for different copies values. There is now logic that will add DVAs to the dedup table entry if more copies are needed for new writes. However, this interacts poorly with ganging. There are two different cases that can result in mixed gang/non-gang BPs, which are illegal in ZFS. This change modifies updates of existing FDT; if there are already gang DVAs in the FDT, we prevent the new write from extending the DDT entry. We cannot safely mix different gang trees in one block pointer. if there are non-gang DVAs in the FDT, then this allocation may not be gangs. If it would gang, we have to redo the whole write as a non-dedup write. This change also fixes a refcount leak that could occur if the lead DDT write failed. Sponsored by: iXsystems, Inc. Sponsored-by: Klara, Inc. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Paul Dagnelie <paul.dagnelie@klarasystems.com> Closes: #17123 |
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