/*
* Copyright (c) 2014 Intel Corporation. All rights reserved.
* Copyright (c) 2014 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "iwpm_util.h"
static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
static int iwpm_user_pid = IWPM_PID_UNDEFINED;
static atomic_t echo_nlmsg_seq;
/**
* iwpm_valid_pid - Check if the userspace iwarp port mapper pid is valid
*
* Returns true if the pid is greater than zero, otherwise returns false
*/
int iwpm_valid_pid(void)
{
return iwpm_user_pid > 0;
}
/**
* iwpm_register_pid - Send a netlink query to userspace
* to get the iwarp port mapper pid
* @pm_msg: Contains driver info to send to the userspace port mapper
* @nl_client: The index of the netlink client
*
* nlmsg attributes:
* [IWPM_NLA_REG_PID_SEQ]
* [IWPM_NLA_REG_IF_NAME]
* [IWPM_NLA_REG_IBDEV_NAME]
* [IWPM_NLA_REG_ULIB_NAME]
*/
int iwpm_register_pid(struct iwpm_dev_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_check_registration(nl_client, IWPM_REG_VALID) ||
iwpm_user_pid == IWPM_PID_UNAVAILABLE)
return 0;
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client);
if (!skb) {
err_str = "Unable to create a nlmsg";
goto pid_query_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 pid_query_error;
}
msg_seq = atomic_read(&echo_nlmsg_seq);
/* fill in the pid request message */
err_str = "Unable to put attribute of the nlmsg";
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ);
if (ret)
goto pid_query_error;
ret = ibnl_put_attr(skb, nlh, IFNAMSIZ,
pm_msg->if_name, IWPM_NLA_REG_IF_NAME);
if (ret)
goto pid_query_error;
ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE,
pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME);
if (ret)
goto pid_query_error;
ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE,
(char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME);
if (ret)
goto pid_query_error;
nlmsg_end(skb, nlh);
pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n",
__func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name);
ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNAVAILABLE;
err_str = "Unable to send a nlmsg";
goto pid_query_error;
}
nlmsg_request->req_buffer = pm_msg;
ret = iwpm_wait_complete_req(nlmsg_request);
return ret;
pid_query_error:
pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
dev_kfree_skb(skb);
if (nlmsg_request)
iwpm_free_nlmsg_request(&nlmsg_request->kref);
return ret;
}
/**
* iwpm_add_mapping - Send a netlink add mapping request to
* the userspace port mapper
* @pm_msg: Contains the local ip/tcp address info to send
* @nl_client: The index of the netlink client
*
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
* [IWPM_NLA_MANAGE_FLAGS]
*
* If the request is successful, the pm_msg stores
* the port mapper response (mapped address info)
*/
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_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;
/* If flags are required and we're not V4, then return a quiet error */
if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
ret = -EINVAL;
goto add_mapping_error_nowarn;
}
if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
IWPM_NLA_MANAGE_FLAGS);
if (ret)
goto add_mapping_error;
}
nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
ret = rdma_nl_unicast_wait(&init_net, 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 add_mapping_error;
}
ret = iwpm_wait_complete_req(nlmsg_request);
return ret;
add_mapping_error:
pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
add_mapping_error_nowarn:
dev_kfree_skb(skb);
if (nlmsg_request)
iwpm_free_nlmsg_request(&nlmsg_request->kref);
return ret;
}
/**
* iwpm_add_and_query_mapping - Process the port mapper response to
* iwpm_add_and_query_mapping request
* @pm_msg: Contains the local ip/tcp address info to send
* @nl_client: The index of the netlink client
*
* nlmsg attributes:
* [IWPM_NLA_QUERY_MAPPING_SEQ]
* [IWPM_NLA_QUERY_LOCAL_ADDR]
* [IWPM_NLA_QUERY_REMOTE_ADDR]
* [IWPM_NLA_QUERY_FLAGS]
*/
int iwpm_add_and_query_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_pid())
return 0;
if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
err_str = "Unregistered port mapper client";
goto query_mapping_error;
}
ret = -ENOMEM;
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client);
if (!skb) {
err_str = "Unable to create a nlmsg";
goto query_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 query_mapping_error;
}
msg_seq = atomic_read(&echo_nlmsg_seq);
/* fill in the query message */
err_str = "Unable to put attribute of the nlmsg";
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq,
IWPM_NLA_QUERY_MAPPING_SEQ);
if (ret)
goto query_mapping_error;
ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
&pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR);
if (ret)
goto query_mapping_error;
ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage),
&pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
if (ret)
goto query_mapping_error;
/* If flags are required and we're not V4, then return a quite error */
if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
ret = -EINVAL;
goto query_mapping_error_nowarn;
}
if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
IWPM_NLA_QUERY_FLAGS);
if (ret)
goto query_mapping_error;
}
nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
err_str = "Unable to send a nlmsg";
goto query_mapping_error;
}
ret = iwpm_wait_complete_req(nlmsg_request);
return ret;
query_mapping_error:
pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
query_mapping_error_nowarn:
dev_kfree_skb(skb);
if (nlmsg_request)
iwpm_free_nlmsg_request(&nlmsg_request->kref);
return ret;
}
/**
* iwpm_remove_mapping - Send a netlink remove mapping request
* to the userspace port mapper
*
* @local_addr: Local ip/tcp address to remove
* @nl_client: The index of the netlink client
*
* 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_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(&init_net, 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 = %u)\n", __func__, err_str, nl_client);
if (skb)
dev_kfree_skb_any(skb);
return ret;
}
/* netlink attribute policy for the received response to register pid request */
static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
[IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 },
[IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING,
.len = IWPM_DEVNAME_SIZE - 1 },
[IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING,
.len = IWPM_ULIBNAME_SIZE - 1 },
[IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 },
[IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
};
/**
* iwpm_register_pid_cb - Process the port mapper response to
* iwpm_register_pid query
* @skb: The socket buffer
* @cb: Contains the received message (payload and netlink header)
*
* If successful, the function receives the userspace port mapper pid
* which is used in future communication with the port mapper
*/
int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
struct iwpm_nlmsg_request *nlmsg_request = NULL;
struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX];
struct iwpm_dev_data *pm_msg;
char *dev_name, *iwpm_name;
u32 msg_seq;
u8 nl_client;
u16 iwpm_version;
const char *msg_type = "Register Pid response";
if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX,
resp_reg_policy, nltb, msg_type))
return -EINVAL;
msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_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;
nl_client = nlmsg_request->nl_client;
dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]);
iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]);
iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]);
/* check device name, ulib name and version */
if (strcmp(pm_msg->dev_name, dev_name) ||
strcmp(iwpm_ulib_name, iwpm_name) ||
iwpm_version < IWPM_UABI_VERSION_MIN) {
pr_info("%s: Incorrect info (dev = %s name = %s version = %u)\n",
__func__, dev_name, iwpm_name, iwpm_version);
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
goto register_pid_response_exit;
}
iwpm_user_pid = cb->nlh->nlmsg_pid;
iwpm_ulib_version = iwpm_version;
if (iwpm_ulib_version < IWPM_UABI_VERSION)
pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
__func__, iwpm_user_pid);
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;
}
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