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devlink: Prepare code to fill multiple port function attributes

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Prepare code to fill zero or more port function optional attributes.
Subsequent patch makes use of this to fill more port function
attributes.

Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Vu Pham <vuhuong@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Parav Pandit 2020-12-11 22:12:12 -08:00 committed by Saeed Mahameed
parent 7b8fc0103b
commit 1230d94820
1 changed files with 33 additions and 31 deletions
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64
net/core/devlink.c
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@ -712,6 +712,31 @@ static int devlink_nl_port_attrs_put(struct sk_buff *msg,
return 0;
}
static int
devlink_port_fn_hw_addr_fill(struct devlink *devlink, const struct devlink_ops *ops,
struct devlink_port *port, struct sk_buff *msg,
struct netlink_ext_ack *extack, bool *msg_updated)
{
u8 hw_addr[MAX_ADDR_LEN];
int hw_addr_len;
int err;
if (!ops->port_function_hw_addr_get)
return 0;
err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
if (err)
return err;
*msg_updated = true;
return 0;
}
static int
devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
struct netlink_ext_ack *extack)
@ -719,36 +744,17 @@ devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *por
struct devlink *devlink = port->devlink;
const struct devlink_ops *ops;
struct nlattr *function_attr;
bool empty_nest = true;
int err = 0;
bool msg_updated = false;
int err;
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 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)
err = devlink_port_fn_hw_addr_fill(devlink, ops, port, msg,
extack, &msg_updated);
if (err || !msg_updated)
nla_nest_cancel(msg, function_attr);
else
nla_nest_end(msg, function_attr);
@ -986,7 +992,6 @@ devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *
const struct devlink_ops *ops;
const u8 *hw_addr;
int hw_addr_len;
int err;
hw_addr = nla_data(attr);
hw_addr_len = nla_len(attr);
@ -1011,12 +1016,7 @@ devlink_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *
return -EOPNOTSUPP;
}
err = ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
if (err)
return err;
devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
return 0;
return ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
}
static int
@ -1037,6 +1037,8 @@ devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
if (attr)
err = devlink_port_function_hw_addr_set(devlink, port, attr, extack);
if (!err)
devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
return err;
}