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hw/nvme: do not auto-generate eui64

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We cannot provide auto-generated unique or persistent namespace
identifiers (EUI64, NGUID, UUID) easily. Since 6.1, namespaces have been
assigned a generated EUI64 of the form "52:54:00:<namespace counter>".
This is will be unique within a QEMU instance, but not globally.

Revert that this is assigned automatically and immediately deprecate the
compatibility parameter. Users can opt-in to this with the
`eui64-default=on` device parameter or set it explicitly with
`eui64=UINT64`.

Cc: libvir-list@redhat.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Klaus Jensen 2022-04-29 10:33:33 +02:00
parent a859eb9f8f
commit 36d83272d5
3 changed files with 9 additions and 1 deletions
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7
docs/about/deprecated.rst
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@ -296,6 +296,13 @@ contains native support for this feature and thus use of the option
ROM approach is obsolete. The native SeaBIOS support can be activated
by using ``-machine graphics=off``.
``-device nvme-ns,eui64-default=on|off`` (since 7.1)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
In QEMU versions 6.1, 6.2 and 7.0, the ``nvme-ns`` generates an EUI-64
identifer that is not globally unique. If an EUI-64 identifer is required, the
user must set it explicitly using the ``nvme-ns`` device parameter ``eui64``.
Block device options
''''''''''''''''''''