diff options
Diffstat (limited to 'net/devlink/netlink.c')
| -rw-r--r-- | net/devlink/netlink.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/net/devlink/netlink.c b/net/devlink/netlink.c index fc3e7c029a3b..809bfc3ba8c4 100644 --- a/net/devlink/netlink.c +++ b/net/devlink/netlink.c @@ -82,6 +82,38 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = { [DEVLINK_ATTR_REGION_DIRECT] = { .type = NLA_FLAG }, }; +int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net, + struct devlink *devlink, int attrtype) +{ + struct nlattr *nested_attr; + struct net *devl_net; + + nested_attr = nla_nest_start(msg, attrtype); + if (!nested_attr) + return -EMSGSIZE; + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + rcu_read_lock(); + devl_net = read_pnet_rcu(&devlink->_net); + if (!net_eq(net, devl_net)) { + int id = peernet2id_alloc(net, devl_net, GFP_ATOMIC); + + rcu_read_unlock(); + if (nla_put_s32(msg, DEVLINK_ATTR_NETNS_ID, id)) + return -EMSGSIZE; + } else { + rcu_read_unlock(); + } + + nla_nest_end(msg, nested_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, nested_attr); + return -EMSGSIZE; +} + int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info) { int err; |