diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/devlink.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c index 05197631d52a..b6848b607e9c 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -563,6 +563,49 @@ static int devlink_nl_port_attrs_put(struct sk_buff *msg, return 0; } +static int +devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, + struct netlink_ext_ack *extack) +{ + struct devlink *devlink = port->devlink; + const struct devlink_ops *ops; + struct nlattr *function_attr; + bool empty_nest = true; + int err = 0; + + function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); + if (!function_attr) + return -EMSGSIZE; + + ops = devlink->ops; + if (ops->port_function_hw_addr_get) { + int uninitialized_var(hw_addr_len); + u8 hw_addr[MAX_ADDR_LEN]; + + err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack); + if (err == -EOPNOTSUPP) { + /* Port function attributes are optional for a port. If port doesn't + * support function attribute, returning -EOPNOTSUPP is not an error. + */ + err = 0; + goto out; + } else if (err) { + goto out; + } + err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); + if (err) + goto out; + empty_nest = false; + } + +out: + if (err || empty_nest) + nla_nest_cancel(msg, function_attr); + else + nla_nest_end(msg, function_attr); + return err; +} + static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink, struct devlink_port *devlink_port, enum devlink_command cmd, u32 portid, @@ -608,6 +651,8 @@ static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink, spin_unlock_bh(&devlink_port->type_lock); if (devlink_nl_port_attrs_put(msg, devlink_port)) goto nla_put_failure; + if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) + goto nla_put_failure; genlmsg_end(msg, hdr); return 0; |