diff options
Diffstat (limited to 'net/core/devlink.c')
| -rw-r--r-- | net/core/devlink.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c index 94c797b74378..346d385ba09f 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -940,6 +940,7 @@ static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, struct genl_info *info) { struct devlink *devlink = info->user_ptr[0]; + struct devlink_port *devlink_port; u32 port_index; u32 count; @@ -947,8 +948,27 @@ static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, !info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]) return -EINVAL; + devlink_port = devlink_port_get_from_info(devlink, info); port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); + + if (IS_ERR(devlink_port)) + return -EINVAL; + + if (!devlink_port->attrs.splittable) { + /* Split ports cannot be split. */ + if (devlink_port->attrs.split) + NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further"); + else + NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split"); + return -EINVAL; + } + + if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { + NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count"); + return -EINVAL; + } + return devlink_port_split(devlink, port_index, count, info->extack); } |