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linux/drivers/infiniband/core/iwpm_msg.c
Steve Wise b0bad9ad51 RDMA/IWPM: Support no port mapping requirements 
A soft iwarp driver that uses the host TCP stack via a kernel mode socket
does not need port mapping.  In fact, if the port map daemon, iwpmd, is
running, then iwpmd must not try and create/bind a socket to the actual
port for a soft iwarp connection, since the driver already has that socket
bound.

Yet if the soft iwarp driver wants to interoperate with hard iwarp devices
that -are- using port mapping, then the soft iwarp driver's mappings still
need to be maintained and advertised by the iwpm protocol.

This patch enhances the rdma driver<->iwcm interface to allow an iwarp
driver to specify that it does not want port mapping.  The iwpm
kernel<->iwpmd interface is also enhanced to pass up this information on
map requests.

Care is taken to interoperate with the current iwpmd version (ABI version
3) and only use the new NL attributes if iwpmd supports ABI version 4.

The ABI version define has also been created in rdma_netlink.h so both
kernel and user code can share it.  The iwcm and iwpmd negotiate the ABI
version to use with a new HELLO netlink message.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2019-02-04 16:26:02 -07:00

831 lines
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/*
* 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;
int iwpm_valid_pid(void)
{
return iwpm_user_pid > 0;
}
/*
* iwpm_register_pid - Send a netlink query to user space
* for the iwarp port mapper pid
*
* 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_valid_client(nl_client)) {
err_str = "Invalid port mapper client";
goto pid_query_error;
}
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(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 = %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_add_mapping - Send a netlink add mapping message
* to the port mapper
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
* [IWPM_NLA_MANAGE_FLAGS]
*/
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;
/* 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(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 = %d)\n", __func__, err_str, nl_client);
add_mapping_error_nowarn:
if (skb)
dev_kfree_skb(skb);
if (nlmsg_request)
iwpm_free_nlmsg_request(&nlmsg_request->kref);
return ret;
}
/*
* iwpm_add_and_query_mapping - Send a netlink add and query
* mapping message to the port mapper
* 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_client(nl_client)) {
err_str = "Invalid port mapper client";
goto query_mapping_error;
}
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(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 = %d)\n", __func__, err_str, nl_client);
query_mapping_error_nowarn:
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;
}
/* 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 a port mapper response to
* iwpm_register_pid()
*/
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 = %d)\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 %u. 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);
if (iwpm_valid_client(nl_client))
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 a port mapper response to
* iwpm_add_mapping()
*/
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 a port mapper response to
* iwpm_add_and_query_mapping()
*/
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 a port mapper message, containing
* the remote connecting peer address info
*/
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);
if (!iwpm_valid_client(nl_client)) {
pr_info("%s: Invalid port mapper client = %d\n",
__func__, nl_client);
return ret;
}
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 port mapper request for mapping info
*/
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 = %d\n",
__func__, iwpm_name, iwpm_version);
return ret;
}
nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
if (!iwpm_valid_client(nl_client)) {
pr_info("%s: Invalid port mapper client = %d\n",
__func__, nl_client);
return ret;
}
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 %u. 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 a port mapper ack for
* the provided mapping info records
*/
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 a port mapper error message
*/
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 port mapper hello request
*/
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);
if (!iwpm_valid_client(nl_client)) {
pr_info("%s: Invalid port mapper client = %d\n",
__func__, nl_client);
return ret;
}
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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