linux/include/rdma/iw_portmap.h
Tatyana Nikolova 6eec177461 RDMA/core: Enable the iWarp Port Mapper to provide the actual address of the connecting peer to its clients
Add functionality to enable the port mapper on the passive side to provide to its
clients the actual (non-mapped) ip/tcp address information of the connecting peer

1) Adding remote_info_cb() to process the address info of the connecting peer
   The address info is provided by the user space port mapper service when
   the connection is initiated by the peer
2) Adding a hash list to store the remote address info
3) Adding functionality to add/remove the remote address info
   After the info has been provided to the port mapper client,
   it is removed from the hash list

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
2015-05-05 09:18:01 -04:00

225 lines
7.5 KiB
C

/*
* 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.
*/
#ifndef _IW_PORTMAP_H
#define _IW_PORTMAP_H
#define IWPM_ULIBNAME_SIZE 32
#define IWPM_DEVNAME_SIZE 32
#define IWPM_IFNAME_SIZE 16
#define IWPM_IPADDR_SIZE 16
enum {
IWPM_INVALID_NLMSG_ERR = 10,
IWPM_CREATE_MAPPING_ERR,
IWPM_DUPLICATE_MAPPING_ERR,
IWPM_UNKNOWN_MAPPING_ERR,
IWPM_CLIENT_DEV_INFO_ERR,
IWPM_USER_LIB_INFO_ERR,
IWPM_REMOTE_QUERY_REJECT
};
struct iwpm_dev_data {
char dev_name[IWPM_DEVNAME_SIZE];
char if_name[IWPM_IFNAME_SIZE];
};
struct iwpm_sa_data {
struct sockaddr_storage loc_addr;
struct sockaddr_storage mapped_loc_addr;
struct sockaddr_storage rem_addr;
struct sockaddr_storage mapped_rem_addr;
};
/**
* iwpm_init - Allocate resources for the iwarp port mapper
*
* Should be called when network interface goes up.
*/
int iwpm_init(u8);
/**
* iwpm_exit - Deallocate resources for the iwarp port mapper
*
* Should be called when network interface goes down.
*/
int iwpm_exit(u8);
/**
* 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);
/**
* 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
*/
int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client);
/**
* 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
*
* 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);
/**
* iwpm_add_and_query_mapping - Send a netlink add and query mapping request
* to the userspace port mapper
* @pm_msg: Contains the local and remote ip/tcp address info to send
* @nl_client: The index of the netlink client
*
* If the request is successful, the pm_msg stores the
* port mapper response (mapped local and remote address info)
*/
int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client);
/**
* 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
*/
int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client);
/**
* iwpm_register_pid_cb - Process the port mapper response to
* iwpm_register_pid query
* @skb:
* @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 *, struct netlink_callback *);
/**
* iwpm_add_mapping_cb - Process the port mapper response to
* iwpm_add_mapping request
* @skb:
* @cb: Contains the received message (payload and netlink header)
*/
int iwpm_add_mapping_cb(struct sk_buff *, struct netlink_callback *);
/**
* iwpm_add_and_query_mapping_cb - Process the port mapper response to
* iwpm_add_and_query_mapping request
* @skb:
* @cb: Contains the received message (payload and netlink header)
*/
int iwpm_add_and_query_mapping_cb(struct sk_buff *, struct netlink_callback *);
/**
* iwpm_remote_info_cb - Process remote connecting peer address info, which
* the port mapper has received from the connecting peer
*
* @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 *, struct netlink_callback *);
/**
* iwpm_mapping_error_cb - Process port mapper notification for error
*
* @skb:
* @cb: Contains the received message (payload and netlink header)
*/
int iwpm_mapping_error_cb(struct sk_buff *, struct netlink_callback *);
/**
* iwpm_mapping_info_cb - Process a notification that the userspace
* port mapper daemon is started
* @skb:
* @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 *, struct netlink_callback *);
/**
* iwpm_ack_mapping_info_cb - Process the port mapper ack for
* the provided local mapping info records
* @skb:
* @cb: Contains the received message (payload and netlink header)
*/
int iwpm_ack_mapping_info_cb(struct sk_buff *, struct netlink_callback *);
/**
* iwpm_get_remote_info - Get the remote connecting peer address info
*
* @mapped_loc_addr: Mapped local address of the listening peer
* @mapped_rem_addr: Mapped remote address of the connecting peer
* @remote_addr: To store the remote address of the connecting peer
* @nl_client: The index of the netlink client
*
* The remote address info is retrieved and provided to the client in
* the remote_addr. After that it is removed from the hash table
*/
int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
struct sockaddr_storage *mapped_rem_addr,
struct sockaddr_storage *remote_addr, u8 nl_client);
/**
* iwpm_create_mapinfo - Store local and mapped IPv4/IPv6 address
* info in a hash table
* @local_addr: Local ip/tcp address
* @mapped_addr: Mapped local ip/tcp address
* @nl_client: The index of the netlink client
*/
int iwpm_create_mapinfo(struct sockaddr_storage *local_addr,
struct sockaddr_storage *mapped_addr, u8 nl_client);
/**
* iwpm_remove_mapinfo - Remove local and mapped IPv4/IPv6 address
* info from the hash table
* @local_addr: Local ip/tcp address
* @mapped_addr: Mapped local ip/tcp address
*
* Returns err code if mapping info is not found in the hash table,
* otherwise returns 0
*/
int iwpm_remove_mapinfo(struct sockaddr_storage *local_addr,
struct sockaddr_storage *mapped_addr);
#endif /* _IW_PORTMAP_H */