• Danit Goldberg's avatar
    IB/mlx5: Return the administrative GUID if exists · 4bbd4923
    Danit Goldberg authored
    A user can change the operational GUID (a.k.a affective GUID) through
    link/infiniband. Therefore it is preferred to return the currently set
    GUID if it exists instead of the operational.
    
    This way the PF can query which VF GUID will be set in the next bind.  In
    order to align with MAC address, zero is returned if administrative GUID
    is not set.
    
    For example, before setting administrative GUID:
     $ ip link show
     ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 4092 qdisc mq state UP mode DEFAULT group default qlen 256
     link/infiniband 00:00:00:08:fe:80:00:00:00:00:00:00:52:54:00:c0:fe:12:34:55 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
     vf 0     link/infiniband 00:00:00:08:fe:80:00:00:00:00:00:00:52:54:00:c0:fe:12:34:55 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff,
     spoof checking off, NODE_GUID 00:00:00:00:00:00:00:00, PORT_GUID 00:00:00:00:00:00:00:00, link-state auto, trust off, query_rss off
    
    Then:
    
     $ ip link set ib0 vf 0 node_guid 11:00:af:21:cb:05:11:00
     $ ip link set ib0 vf 0 port_guid 22:11:af:21:cb:05:11:00
    
    After setting administrative GUID:
     $ ip link show
     ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 4092 qdisc mq state UP mode DEFAULT group default qlen 256
     link/infiniband 00:00:00:08:fe:80:00:00:00:00:00:00:52:54:00:c0:fe:12:34:55 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
     vf 0     link/infiniband 00:00:00:08:fe:80:00:00:00:00:00:00:52:54:00:c0:fe:12:34:55 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff,
     spoof checking off, NODE_GUID 11:00:af:21:cb:05:11:00, PORT_GUID 22:11:af:21:cb:05:11:00, link-state auto, trust off, query_rss off
    
    Fixes: 9c0015ef ("IB/mlx5: Implement callbacks for getting VFs GUID attributes")
    Link: https://lore.kernel.org/r/20200116120048.12744-1-leon@kernel.orgSigned-off-by: default avatarDanit Goldberg <danitg@mellanox.com>
    Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
    Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
    4bbd4923
ib_virt.c 6.24 KB