• Hans Wippel's avatar
    net/smc: improve peer ID in CLC decline for SMC-R · a082ec89
    Hans Wippel authored
    According to RFC 7609, all CLC messages contain a peer ID that consists
    of a unique instance ID and the MAC address of one of the host's RoCE
    devices. But if a SMC-R connection cannot be established, e.g., because
    no matching pnet table entry is found, the current implementation uses a
    zero value in the CLC decline message although the host's peer ID is set
    to a proper value.
    
    If no RoCE and no ISM device is usable for a connection, there is no LGR
    and the LGR check in smc_clc_send_decline() prevents that the peer ID is
    copied into the CLC decline message for both SMC-D and SMC-R. So, this
    patch modifies the check to also accept the case of no LGR. Also, only a
    valid peer ID is copied into the decline message.
    Signed-off-by: default avatarHans Wippel <ndev@hwipl.net>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    a082ec89
smc_clc.c 18.2 KB