847 lines
28 KiB
C
847 lines
28 KiB
C
/*
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* Copyright (c) 2014 Intel Corporation. All rights reserved.
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* Copyright (c) 2014 Chelsio, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "iwpm_util.h"
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static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
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u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
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static int iwpm_user_pid = IWPM_PID_UNDEFINED;
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static atomic_t echo_nlmsg_seq;
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/**
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* iwpm_valid_pid - Check if the userspace iwarp port mapper pid is valid
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*
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* Returns true if the pid is greater than zero, otherwise returns false
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*/
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int iwpm_valid_pid(void)
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{
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return iwpm_user_pid > 0;
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}
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/**
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* iwpm_register_pid - Send a netlink query to userspace
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* to get the iwarp port mapper pid
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* @pm_msg: Contains driver info to send to the userspace port mapper
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* @nl_client: The index of the netlink client
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*
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* nlmsg attributes:
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* [IWPM_NLA_REG_PID_SEQ]
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* [IWPM_NLA_REG_IF_NAME]
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* [IWPM_NLA_REG_IBDEV_NAME]
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* [IWPM_NLA_REG_ULIB_NAME]
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*/
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int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
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{
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struct sk_buff *skb = NULL;
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struct iwpm_nlmsg_request *nlmsg_request = NULL;
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struct nlmsghdr *nlh;
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u32 msg_seq;
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const char *err_str = "";
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int ret = -EINVAL;
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if (iwpm_check_registration(nl_client, IWPM_REG_VALID) ||
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iwpm_user_pid == IWPM_PID_UNAVAILABLE)
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return 0;
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skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
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if (!skb) {
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err_str = "Unable to create a nlmsg";
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goto pid_query_error;
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}
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nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
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nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
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if (!nlmsg_request) {
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err_str = "Unable to allocate netlink request";
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goto pid_query_error;
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}
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msg_seq = atomic_read(&echo_nlmsg_seq);
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/* fill in the pid request message */
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err_str = "Unable to put attribute of the nlmsg";
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ);
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if (ret)
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goto pid_query_error;
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ret = ibnl_put_attr(skb, nlh, IFNAMSIZ,
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pm_msg->if_name, IWPM_NLA_REG_IF_NAME);
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if (ret)
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goto pid_query_error;
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ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE,
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pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME);
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if (ret)
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goto pid_query_error;
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ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE,
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(char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME);
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if (ret)
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goto pid_query_error;
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nlmsg_end(skb, nlh);
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pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
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__func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
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ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
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if (ret) {
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skb = NULL; /* skb is freed in the netlink send-op handling */
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iwpm_user_pid = IWPM_PID_UNAVAILABLE;
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err_str = "Unable to send a nlmsg";
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goto pid_query_error;
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}
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nlmsg_request->req_buffer = pm_msg;
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ret = iwpm_wait_complete_req(nlmsg_request);
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return ret;
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pid_query_error:
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pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
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dev_kfree_skb(skb);
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if (nlmsg_request)
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iwpm_free_nlmsg_request(&nlmsg_request->kref);
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return ret;
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}
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/**
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* iwpm_add_mapping - Send a netlink add mapping request to
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* the userspace port mapper
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* @pm_msg: Contains the local ip/tcp address info to send
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* @nl_client: The index of the netlink client
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*
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* nlmsg attributes:
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* [IWPM_NLA_MANAGE_MAPPING_SEQ]
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* [IWPM_NLA_MANAGE_ADDR]
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* [IWPM_NLA_MANAGE_FLAGS]
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*
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* If the request is successful, the pm_msg stores
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* the port mapper response (mapped address info)
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*/
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int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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{
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struct sk_buff *skb = NULL;
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struct iwpm_nlmsg_request *nlmsg_request = NULL;
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struct nlmsghdr *nlh;
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u32 msg_seq;
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const char *err_str = "";
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int ret = -EINVAL;
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if (!iwpm_valid_pid())
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return 0;
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if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
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err_str = "Unregistered port mapper client";
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goto add_mapping_error;
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}
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skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client);
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if (!skb) {
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err_str = "Unable to create a nlmsg";
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goto add_mapping_error;
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}
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nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
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nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL);
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if (!nlmsg_request) {
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err_str = "Unable to allocate netlink request";
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goto add_mapping_error;
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}
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msg_seq = atomic_read(&echo_nlmsg_seq);
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/* fill in the add mapping message */
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err_str = "Unable to put attribute of the nlmsg";
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
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IWPM_NLA_MANAGE_MAPPING_SEQ);
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if (ret)
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goto add_mapping_error;
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ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
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&pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
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if (ret)
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goto add_mapping_error;
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/* If flags are required and we're not V4, then return a quiet error */
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if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
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ret = -EINVAL;
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goto add_mapping_error_nowarn;
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}
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if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
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IWPM_NLA_MANAGE_FLAGS);
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if (ret)
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goto add_mapping_error;
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}
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nlmsg_end(skb, nlh);
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nlmsg_request->req_buffer = pm_msg;
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ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
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if (ret) {
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skb = NULL; /* skb is freed in the netlink send-op handling */
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iwpm_user_pid = IWPM_PID_UNDEFINED;
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err_str = "Unable to send a nlmsg";
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goto add_mapping_error;
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}
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ret = iwpm_wait_complete_req(nlmsg_request);
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return ret;
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add_mapping_error:
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pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
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add_mapping_error_nowarn:
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dev_kfree_skb(skb);
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if (nlmsg_request)
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iwpm_free_nlmsg_request(&nlmsg_request->kref);
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return ret;
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}
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/**
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* iwpm_add_and_query_mapping - Process the port mapper response to
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* iwpm_add_and_query_mapping request
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* @pm_msg: Contains the local ip/tcp address info to send
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* @nl_client: The index of the netlink client
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*
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* nlmsg attributes:
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* [IWPM_NLA_QUERY_MAPPING_SEQ]
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* [IWPM_NLA_QUERY_LOCAL_ADDR]
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* [IWPM_NLA_QUERY_REMOTE_ADDR]
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* [IWPM_NLA_QUERY_FLAGS]
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*/
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int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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{
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struct sk_buff *skb = NULL;
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struct iwpm_nlmsg_request *nlmsg_request = NULL;
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struct nlmsghdr *nlh;
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u32 msg_seq;
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const char *err_str = "";
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int ret = -EINVAL;
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if (!iwpm_valid_pid())
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return 0;
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if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
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err_str = "Unregistered port mapper client";
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goto query_mapping_error;
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}
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ret = -ENOMEM;
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skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
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if (!skb) {
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err_str = "Unable to create a nlmsg";
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goto query_mapping_error;
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}
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nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
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nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq,
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nl_client, GFP_KERNEL);
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if (!nlmsg_request) {
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err_str = "Unable to allocate netlink request";
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goto query_mapping_error;
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}
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msg_seq = atomic_read(&echo_nlmsg_seq);
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/* fill in the query message */
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err_str = "Unable to put attribute of the nlmsg";
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
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IWPM_NLA_QUERY_MAPPING_SEQ);
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if (ret)
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goto query_mapping_error;
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ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
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&pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR);
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if (ret)
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goto query_mapping_error;
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ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
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&pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
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if (ret)
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goto query_mapping_error;
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/* If flags are required and we're not V4, then return a quite error */
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if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
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ret = -EINVAL;
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goto query_mapping_error_nowarn;
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}
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if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
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IWPM_NLA_QUERY_FLAGS);
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if (ret)
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goto query_mapping_error;
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}
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nlmsg_end(skb, nlh);
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nlmsg_request->req_buffer = pm_msg;
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ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
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if (ret) {
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skb = NULL; /* skb is freed in the netlink send-op handling */
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err_str = "Unable to send a nlmsg";
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goto query_mapping_error;
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}
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ret = iwpm_wait_complete_req(nlmsg_request);
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return ret;
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query_mapping_error:
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pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
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query_mapping_error_nowarn:
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dev_kfree_skb(skb);
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if (nlmsg_request)
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iwpm_free_nlmsg_request(&nlmsg_request->kref);
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return ret;
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}
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/**
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* iwpm_remove_mapping - Send a netlink remove mapping request
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* to the userspace port mapper
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*
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* @local_addr: Local ip/tcp address to remove
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* @nl_client: The index of the netlink client
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*
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* nlmsg attributes:
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* [IWPM_NLA_MANAGE_MAPPING_SEQ]
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* [IWPM_NLA_MANAGE_ADDR]
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*/
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int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
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{
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struct sk_buff *skb = NULL;
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struct nlmsghdr *nlh;
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u32 msg_seq;
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const char *err_str = "";
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int ret = -EINVAL;
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if (!iwpm_valid_pid())
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return 0;
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if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
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err_str = "Unregistered port mapper client";
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goto remove_mapping_error;
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}
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skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client);
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if (!skb) {
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ret = -ENOMEM;
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err_str = "Unable to create a nlmsg";
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goto remove_mapping_error;
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}
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msg_seq = atomic_read(&echo_nlmsg_seq);
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nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
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err_str = "Unable to put attribute of the nlmsg";
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ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
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IWPM_NLA_MANAGE_MAPPING_SEQ);
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if (ret)
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goto remove_mapping_error;
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ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
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local_addr, IWPM_NLA_MANAGE_ADDR);
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if (ret)
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goto remove_mapping_error;
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nlmsg_end(skb, nlh);
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ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
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if (ret) {
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skb = NULL; /* skb is freed in the netlink send-op handling */
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iwpm_user_pid = IWPM_PID_UNDEFINED;
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err_str = "Unable to send a nlmsg";
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goto remove_mapping_error;
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}
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iwpm_print_sockaddr(local_addr,
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"remove_mapping: Local sockaddr:");
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return 0;
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remove_mapping_error:
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pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
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if (skb)
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dev_kfree_skb_any(skb);
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return ret;
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}
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/* netlink attribute policy for the received response to register pid request */
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static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
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[IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 },
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[IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING,
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.len = IWPM_DEVNAME_SIZE - 1 },
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[IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING,
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.len = IWPM_ULIBNAME_SIZE - 1 },
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[IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 },
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[IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
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};
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/**
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* iwpm_register_pid_cb - Process the port mapper response to
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* iwpm_register_pid query
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* @skb: The socket buffer
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* @cb: Contains the received message (payload and netlink header)
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*
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* If successful, the function receives the userspace port mapper pid
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* which is used in future communication with the port mapper
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*/
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int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct iwpm_nlmsg_request *nlmsg_request = NULL;
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struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX];
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struct iwpm_dev_data *pm_msg;
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char *dev_name, *iwpm_name;
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u32 msg_seq;
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u8 nl_client;
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u16 iwpm_version;
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const char *msg_type = "Register Pid response";
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if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX,
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resp_reg_policy, nltb, msg_type))
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return -EINVAL;
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msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]);
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nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
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if (!nlmsg_request) {
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pr_info("%s: Could not find a matching request (seq = %u)\n",
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__func__, msg_seq);
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return -EINVAL;
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}
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pm_msg = nlmsg_request->req_buffer;
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nl_client = nlmsg_request->nl_client;
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dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]);
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iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]);
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iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]);
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/* check device name, ulib name and version */
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if (strcmp(pm_msg->dev_name, dev_name) ||
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strcmp(iwpm_ulib_name, iwpm_name) ||
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iwpm_version < IWPM_UABI_VERSION_MIN) {
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pr_info("%s: Incorrect info (dev = %s name = %s version = %u)\n",
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__func__, dev_name, iwpm_name, iwpm_version);
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nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
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goto register_pid_response_exit;
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}
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iwpm_user_pid = cb->nlh->nlmsg_pid;
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iwpm_ulib_version = iwpm_version;
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if (iwpm_ulib_version < IWPM_UABI_VERSION)
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pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
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__func__, iwpm_user_pid);
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atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
|
|
__func__, iwpm_user_pid);
|
|
iwpm_set_registration(nl_client, IWPM_REG_VALID);
|
|
register_pid_response_exit:
|
|
nlmsg_request->request_done = 1;
|
|
/* always for found nlmsg_request */
|
|
kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
|
|
barrier();
|
|
up(&nlmsg_request->sem);
|
|
return 0;
|
|
}
|
|
|
|
/* netlink attribute policy for the received response to add mapping request */
|
|
static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = {
|
|
[IWPM_NLA_RMANAGE_MAPPING_SEQ] = { .type = NLA_U32 },
|
|
[IWPM_NLA_RMANAGE_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 }
|
|
};
|
|
|
|
/**
|
|
* iwpm_add_mapping_cb - Process the port mapper response to
|
|
* iwpm_add_mapping request
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*/
|
|
int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct iwpm_sa_data *pm_msg;
|
|
struct iwpm_nlmsg_request *nlmsg_request = NULL;
|
|
struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX];
|
|
struct sockaddr_storage *local_sockaddr;
|
|
struct sockaddr_storage *mapped_sockaddr;
|
|
const char *msg_type;
|
|
u32 msg_seq;
|
|
|
|
msg_type = "Add Mapping response";
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX,
|
|
resp_add_policy, nltb, msg_type))
|
|
return -EINVAL;
|
|
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
|
|
msg_seq = nla_get_u32(nltb[IWPM_NLA_RMANAGE_MAPPING_SEQ]);
|
|
nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
|
|
if (!nlmsg_request) {
|
|
pr_info("%s: Could not find a matching request (seq = %u)\n",
|
|
__func__, msg_seq);
|
|
return -EINVAL;
|
|
}
|
|
pm_msg = nlmsg_request->req_buffer;
|
|
local_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RMANAGE_ADDR]);
|
|
mapped_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR]);
|
|
|
|
if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) {
|
|
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
|
|
goto add_mapping_response_exit;
|
|
}
|
|
if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) {
|
|
pr_info("%s: Sockaddr family doesn't match the requested one\n",
|
|
__func__);
|
|
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
|
|
goto add_mapping_response_exit;
|
|
}
|
|
memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr,
|
|
sizeof(*mapped_sockaddr));
|
|
iwpm_print_sockaddr(&pm_msg->loc_addr,
|
|
"add_mapping: Local sockaddr:");
|
|
iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
|
|
"add_mapping: Mapped local sockaddr:");
|
|
|
|
add_mapping_response_exit:
|
|
nlmsg_request->request_done = 1;
|
|
/* always for found request */
|
|
kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
|
|
barrier();
|
|
up(&nlmsg_request->sem);
|
|
return 0;
|
|
}
|
|
|
|
/* netlink attribute policy for the response to add and query mapping request
|
|
* and response with remote address info
|
|
*/
|
|
static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = {
|
|
[IWPM_NLA_RQUERY_MAPPING_SEQ] = { .type = NLA_U32 },
|
|
[IWPM_NLA_RQUERY_LOCAL_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RQUERY_REMOTE_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = {
|
|
.len = sizeof(struct sockaddr_storage) },
|
|
[IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 }
|
|
};
|
|
|
|
/**
|
|
* iwpm_add_and_query_mapping_cb - Process the port mapper response to
|
|
* iwpm_add_and_query_mapping request
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*/
|
|
int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
|
|
struct netlink_callback *cb)
|
|
{
|
|
struct iwpm_sa_data *pm_msg;
|
|
struct iwpm_nlmsg_request *nlmsg_request = NULL;
|
|
struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
|
|
struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
|
|
struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
|
|
const char *msg_type;
|
|
u32 msg_seq;
|
|
u16 err_code;
|
|
|
|
msg_type = "Query Mapping response";
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
|
|
resp_query_policy, nltb, msg_type))
|
|
return -EINVAL;
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
|
|
msg_seq = nla_get_u32(nltb[IWPM_NLA_RQUERY_MAPPING_SEQ]);
|
|
nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
|
|
if (!nlmsg_request) {
|
|
pr_info("%s: Could not find a matching request (seq = %u)\n",
|
|
__func__, msg_seq);
|
|
return -EINVAL;
|
|
}
|
|
pm_msg = nlmsg_request->req_buffer;
|
|
local_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
|
|
remote_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
|
|
mapped_loc_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
|
|
mapped_rem_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
|
|
|
|
err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]);
|
|
if (err_code == IWPM_REMOTE_QUERY_REJECT) {
|
|
pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n",
|
|
__func__, cb->nlh->nlmsg_pid, msg_seq);
|
|
nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT;
|
|
}
|
|
if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) ||
|
|
iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) {
|
|
pr_info("%s: Incorrect local sockaddr\n", __func__);
|
|
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
|
|
goto query_mapping_response_exit;
|
|
}
|
|
if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
|
|
mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
|
|
pr_info("%s: Sockaddr family doesn't match the requested one\n",
|
|
__func__);
|
|
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
|
|
goto query_mapping_response_exit;
|
|
}
|
|
memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr,
|
|
sizeof(*mapped_loc_sockaddr));
|
|
memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr,
|
|
sizeof(*mapped_rem_sockaddr));
|
|
|
|
iwpm_print_sockaddr(&pm_msg->loc_addr,
|
|
"query_mapping: Local sockaddr:");
|
|
iwpm_print_sockaddr(&pm_msg->mapped_loc_addr,
|
|
"query_mapping: Mapped local sockaddr:");
|
|
iwpm_print_sockaddr(&pm_msg->rem_addr,
|
|
"query_mapping: Remote sockaddr:");
|
|
iwpm_print_sockaddr(&pm_msg->mapped_rem_addr,
|
|
"query_mapping: Mapped remote sockaddr:");
|
|
query_mapping_response_exit:
|
|
nlmsg_request->request_done = 1;
|
|
/* always for found request */
|
|
kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
|
|
barrier();
|
|
up(&nlmsg_request->sem);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iwpm_remote_info_cb - Process remote connecting peer address info, which
|
|
* the port mapper has received from the connecting peer
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*
|
|
* Stores the IPv4/IPv6 address info in a hash table
|
|
*/
|
|
int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX];
|
|
struct sockaddr_storage *local_sockaddr, *remote_sockaddr;
|
|
struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr;
|
|
struct iwpm_remote_info *rem_info;
|
|
const char *msg_type;
|
|
u8 nl_client;
|
|
int ret = -EINVAL;
|
|
|
|
msg_type = "Remote Mapping info";
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX,
|
|
resp_query_policy, nltb, msg_type))
|
|
return ret;
|
|
|
|
nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
|
|
local_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
|
|
remote_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
|
|
mapped_loc_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
|
|
mapped_rem_sockaddr = (struct sockaddr_storage *)
|
|
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]);
|
|
|
|
if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family ||
|
|
mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) {
|
|
pr_info("%s: Sockaddr family doesn't match the requested one\n",
|
|
__func__);
|
|
return ret;
|
|
}
|
|
rem_info = kzalloc(sizeof(struct iwpm_remote_info), GFP_ATOMIC);
|
|
if (!rem_info) {
|
|
ret = -ENOMEM;
|
|
return ret;
|
|
}
|
|
memcpy(&rem_info->mapped_loc_sockaddr, mapped_loc_sockaddr,
|
|
sizeof(struct sockaddr_storage));
|
|
memcpy(&rem_info->remote_sockaddr, remote_sockaddr,
|
|
sizeof(struct sockaddr_storage));
|
|
memcpy(&rem_info->mapped_rem_sockaddr, mapped_rem_sockaddr,
|
|
sizeof(struct sockaddr_storage));
|
|
rem_info->nl_client = nl_client;
|
|
|
|
iwpm_add_remote_info(rem_info);
|
|
|
|
iwpm_print_sockaddr(local_sockaddr,
|
|
"remote_info: Local sockaddr:");
|
|
iwpm_print_sockaddr(mapped_loc_sockaddr,
|
|
"remote_info: Mapped local sockaddr:");
|
|
iwpm_print_sockaddr(remote_sockaddr,
|
|
"remote_info: Remote sockaddr:");
|
|
iwpm_print_sockaddr(mapped_rem_sockaddr,
|
|
"remote_info: Mapped remote sockaddr:");
|
|
return ret;
|
|
}
|
|
|
|
/* netlink attribute policy for the received request for mapping info */
|
|
static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
|
|
[IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING,
|
|
.len = IWPM_ULIBNAME_SIZE - 1 },
|
|
[IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
|
|
};
|
|
|
|
/**
|
|
* iwpm_mapping_info_cb - Process a notification that the userspace
|
|
* port mapper daemon is started
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*
|
|
* Using the received port mapper pid, send all the local mapping
|
|
* info records to the userspace port mapper
|
|
*/
|
|
int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX];
|
|
const char *msg_type = "Mapping Info response";
|
|
u8 nl_client;
|
|
char *iwpm_name;
|
|
u16 iwpm_version;
|
|
int ret = -EINVAL;
|
|
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX,
|
|
resp_mapinfo_policy, nltb, msg_type)) {
|
|
pr_info("%s: Unable to parse nlmsg\n", __func__);
|
|
return ret;
|
|
}
|
|
iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]);
|
|
iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]);
|
|
if (strcmp(iwpm_ulib_name, iwpm_name) ||
|
|
iwpm_version < IWPM_UABI_VERSION_MIN) {
|
|
pr_info("%s: Invalid port mapper name = %s version = %u\n",
|
|
__func__, iwpm_name, iwpm_version);
|
|
return ret;
|
|
}
|
|
nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
|
|
iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
iwpm_user_pid = cb->nlh->nlmsg_pid;
|
|
|
|
if (iwpm_ulib_version < IWPM_UABI_VERSION)
|
|
pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
|
|
__func__, iwpm_user_pid);
|
|
|
|
if (!iwpm_mapinfo_available())
|
|
return 0;
|
|
pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
|
|
__func__, iwpm_user_pid);
|
|
ret = iwpm_send_mapinfo(nl_client, iwpm_user_pid);
|
|
return ret;
|
|
}
|
|
|
|
/* netlink attribute policy for the received mapping info ack */
|
|
static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
|
|
[IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 },
|
|
[IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 },
|
|
[IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
|
|
};
|
|
|
|
/**
|
|
* iwpm_ack_mapping_info_cb - Process the port mapper ack for
|
|
* the provided local mapping info records
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*/
|
|
int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX];
|
|
u32 mapinfo_send, mapinfo_ack;
|
|
const char *msg_type = "Mapping Info Ack";
|
|
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX,
|
|
ack_mapinfo_policy, nltb, msg_type))
|
|
return -EINVAL;
|
|
mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]);
|
|
mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]);
|
|
if (mapinfo_ack != mapinfo_send)
|
|
pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n",
|
|
__func__, mapinfo_send, mapinfo_ack);
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
return 0;
|
|
}
|
|
|
|
/* netlink attribute policy for the received port mapper error message */
|
|
static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
|
|
[IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 },
|
|
[IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
|
|
};
|
|
|
|
/**
|
|
* iwpm_mapping_error_cb - Process port mapper notification for error
|
|
*
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*/
|
|
int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct iwpm_nlmsg_request *nlmsg_request = NULL;
|
|
int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
|
|
struct nlattr *nltb[IWPM_NLA_ERR_MAX];
|
|
u32 msg_seq;
|
|
u16 err_code;
|
|
const char *msg_type = "Mapping Error Msg";
|
|
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX,
|
|
map_error_policy, nltb, msg_type))
|
|
return -EINVAL;
|
|
|
|
msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]);
|
|
err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]);
|
|
pr_info("%s: Received msg seq = %u err code = %u client = %d\n",
|
|
__func__, msg_seq, err_code, nl_client);
|
|
/* look for nlmsg_request */
|
|
nlmsg_request = iwpm_find_nlmsg_request(msg_seq);
|
|
if (!nlmsg_request) {
|
|
/* not all errors have associated requests */
|
|
pr_debug("Could not find matching req (seq = %u)\n", msg_seq);
|
|
return 0;
|
|
}
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
nlmsg_request->err_code = err_code;
|
|
nlmsg_request->request_done = 1;
|
|
/* always for found request */
|
|
kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
|
|
barrier();
|
|
up(&nlmsg_request->sem);
|
|
return 0;
|
|
}
|
|
|
|
/* netlink attribute policy for the received hello request */
|
|
static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
|
|
[IWPM_NLA_HELLO_ABI_VERSION] = { .type = NLA_U16 }
|
|
};
|
|
|
|
/**
|
|
* iwpm_hello_cb - Process a hello message from iwpmd
|
|
*
|
|
* @skb: The socket buffer
|
|
* @cb: Contains the received message (payload and netlink header)
|
|
*
|
|
* Using the received port mapper pid, send the kernel's abi_version
|
|
* after adjusting it to support the iwpmd version.
|
|
*/
|
|
int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
|
|
const char *msg_type = "Hello request";
|
|
u8 nl_client;
|
|
u16 abi_version;
|
|
int ret = -EINVAL;
|
|
|
|
if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
|
|
msg_type)) {
|
|
pr_info("%s: Unable to parse nlmsg\n", __func__);
|
|
return ret;
|
|
}
|
|
abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
|
|
nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
|
|
iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
|
|
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
|
|
iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
|
|
pr_debug("Using ABI version %u\n", iwpm_ulib_version);
|
|
iwpm_user_pid = cb->nlh->nlmsg_pid;
|
|
ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
|
|
return ret;
|
|
}
|