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devlink: Validate port function request 

In order to avoid partial request processing, validate the request
before processing it.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Shay Drory 2022-12-06 20:51:13 +02:00 committed by Jakub Kicinski
parent df268f6ca7
commit c0bea69d1c
1 changed files with 23 additions and 9 deletions
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32
net/core/devlink.c
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@ -1632,11 +1632,6 @@ static int devlink_port_function_hw_addr_set(struct devlink_port *port,
}
}
if (!ops->port_function_hw_addr_set) {
NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function attributes");
return -EOPNOTSUPP;
}
return ops->port_function_hw_addr_set(port, hw_addr, hw_addr_len,
extack);
}
@ -1650,12 +1645,27 @@ static int devlink_port_fn_state_set(struct devlink_port *port,
state = nla_get_u8(attr);
ops = port->devlink->ops;
if (!ops->port_fn_state_set) {
NL_SET_ERR_MSG_MOD(extack,
"Function does not support state setting");
return ops->port_fn_state_set(port, state, extack);
}
static int devlink_port_function_validate(struct devlink_port *devlink_port,
struct nlattr **tb,
struct netlink_ext_ack *extack)
{
const struct devlink_ops *ops = devlink_port->devlink->ops;
if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] &&
!ops->port_function_hw_addr_set) {
NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
"Port doesn't support function attributes");
return -EOPNOTSUPP;
}
return ops->port_fn_state_set(port, state, extack);
if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) {
NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR],
"Function does not support state setting");
return -EOPNOTSUPP;
}
return 0;
}
static int devlink_port_function_set(struct devlink_port *port,
@ -1672,6 +1682,10 @@ static int devlink_port_function_set(struct devlink_port *port,
return err;
}
err = devlink_port_function_validate(port, tb, extack);
if (err)
return err;
attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
if (attr) {
err = devlink_port_function_hw_addr_set(port, attr, extack);