/*
* iwpm_add_mapping - Send a netlink add mapping message
* to the port mapper
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
*/
int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
{
struct sk_buff *skb = NULL;
struct iwpm_nlmsg_request *nlmsg_request = NULL;
struct nlmsghdr *nlh;
u32 msg_seq;
const char *err_str = "";
int ret = -EINVAL;
if (!iwpm_valid_client(nl_client)) {
err_str = "Invalid port mapper client";
goto add_mapping_error;
}
if (!iwpm_valid_pid())
return 0;
if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
err_str = "Unregistered port mapper client";
goto add_mapping_error;
}
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
if (!skb) {
err_str = "Unable to create a nlmsg";
goto add_mapping_error;
}
nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
if (!nlmsg_request) {
err_str = "Unable to allocate netlink request";
goto add_mapping_error;
}
msg_seq = atomic_read(&echo_nlmsg_seq);
/* fill in the add mapping message */
err_str = "Unable to put attribute of the nlmsg";
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
IWPM_NLA_MANAGE_MAPPING_SEQ);
if (ret)
goto add_mapping_error;
ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
&pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
if (ret)
goto add_mapping_error;
nlmsg_request->req_buffer = pm_msg;
ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
err_str = "Unable to send a nlmsg";
goto add_mapping_error;
}
ret = iwpm_wait_complete_req(nlmsg_request);
return ret;
add_mapping_error:
pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
if (skb)
dev_kfree_skb(skb);
if (nlmsg_request)
iwpm_free_nlmsg_request(&nlmsg_request->kref);
return ret;
}
/*
* iwpm_remove_mapping - Send a netlink remove mapping message
* to the port mapper
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
*/
int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
{
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
u32 msg_seq;
const char *err_str = "";
int ret = -EINVAL;
if (!iwpm_valid_client(nl_client)) {
err_str = "Invalid port mapper client";
goto remove_mapping_error;
}
if (!iwpm_valid_pid())
return 0;
if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
err_str = "Unregistered port mapper client";
goto remove_mapping_error;
}
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
if (!skb) {
ret = -ENOMEM;
err_str = "Unable to create a nlmsg";
goto remove_mapping_error;
}
msg_seq = atomic_read(&echo_nlmsg_seq);
nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
err_str = "Unable to put attribute of the nlmsg";
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
IWPM_NLA_MANAGE_MAPPING_SEQ);
if (ret)
goto remove_mapping_error;
ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
local_addr, IWPM_NLA_MANAGE_ADDR);
if (ret)
goto remove_mapping_error;
nlmsg_end(skb, nlh);
ret = rdma_nl_unicast_wait(skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
err_str = "Unable to send a nlmsg";
goto remove_mapping_error;
}
iwpm_print_sockaddr(local_addr,
"remove_mapping: Local sockaddr:");
return 0;
remove_mapping_error:
pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
if (skb)
dev_kfree_skb_any(skb);
return ret;
}