nbft: Discovery support #2315
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nbft: Discovery support #2315
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This was referenced Apr 25, 2024
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Needed for nbft, useful to have public. Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>
libnvme cleanup definitions are not part of public API. Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>
This adds actual discovery support for Discovery Descriptor records. SSNS records are connected first. Discovery Descriptor records are checked for any existing (back-)reference from SSNS records and are skipped if so. It is assumed in such case that the pre-OS driver has succeeded in discovery and filled SSNS records accordingly. In case no SSNS record references the particular Discovery record, an actual discovery is performed. Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>
Depending on a pre-OS implementation, boot attempts pointing to the well-known discovery NQN may get transformed in an SSNS record (and marked as 'unavailable') in case the discovery cannot be performed. Otherwise the NBFT table should be populated by discovered records instead. Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>
Attempt to look up and use existing (persistent) discovery controller. Signed-off-by: Tomas Bzatek <tbzatek@redhat.com>
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This brings support for performing discovery and connect-all from Discovery Descriptor List records.
Needs linux-nvme/libnvme#820 to parse URIs from NBFT.
Tested with static IPv4 and IPv6 against linux soft target.
For now, persistent discovery controllers have not been tested.