239 строки
7.3 KiB
C
239 строки
7.3 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 _IWPM_UTIL_H
|
|
#define _IWPM_UTIL_H
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <linux/in.h>
|
|
#include <linux/in6.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/jhash.h>
|
|
#include <linux/kref.h>
|
|
#include <net/netlink.h>
|
|
#include <linux/errno.h>
|
|
#include <rdma/iw_portmap.h>
|
|
#include <rdma/rdma_netlink.h>
|
|
|
|
|
|
#define IWPM_NL_RETRANS 3
|
|
#define IWPM_NL_TIMEOUT (10*HZ)
|
|
#define IWPM_MAPINFO_SKB_COUNT 20
|
|
|
|
#define IWPM_PID_UNDEFINED -1
|
|
#define IWPM_PID_UNAVAILABLE -2
|
|
|
|
struct iwpm_nlmsg_request {
|
|
struct list_head inprocess_list;
|
|
__u32 nlmsg_seq;
|
|
void *req_buffer;
|
|
u8 nl_client;
|
|
u8 request_done;
|
|
u16 err_code;
|
|
wait_queue_head_t waitq;
|
|
struct kref kref;
|
|
};
|
|
|
|
struct iwpm_mapping_info {
|
|
struct hlist_node hlist_node;
|
|
struct sockaddr_storage local_sockaddr;
|
|
struct sockaddr_storage mapped_sockaddr;
|
|
u8 nl_client;
|
|
};
|
|
|
|
struct iwpm_admin_data {
|
|
atomic_t refcount;
|
|
atomic_t nlmsg_seq;
|
|
int client_list[RDMA_NL_NUM_CLIENTS];
|
|
int reg_list[RDMA_NL_NUM_CLIENTS];
|
|
};
|
|
|
|
/**
|
|
* iwpm_get_nlmsg_request - Allocate and initialize netlink message request
|
|
* @nlmsg_seq: Sequence number of the netlink message
|
|
* @nl_client: The index of the netlink client
|
|
* @gfp: Indicates how the memory for the request should be allocated
|
|
*
|
|
* Returns the newly allocated netlink request object if successful,
|
|
* otherwise returns NULL
|
|
*/
|
|
struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq,
|
|
u8 nl_client, gfp_t gfp);
|
|
|
|
/**
|
|
* iwpm_free_nlmsg_request - Deallocate netlink message request
|
|
* @kref: Holds reference of netlink message request
|
|
*/
|
|
void iwpm_free_nlmsg_request(struct kref *kref);
|
|
|
|
/**
|
|
* iwpm_find_nlmsg_request - Find netlink message request in the request list
|
|
* @echo_seq: Sequence number of the netlink request to find
|
|
*
|
|
* Returns the found netlink message request,
|
|
* if not found, returns NULL
|
|
*/
|
|
struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq);
|
|
|
|
/**
|
|
* iwpm_wait_complete_req - Block while servicing the netlink request
|
|
* @nlmsg_request: Netlink message request to service
|
|
*
|
|
* Wakes up, after the request is completed or expired
|
|
* Returns 0 if the request is complete without error
|
|
*/
|
|
int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request);
|
|
|
|
/**
|
|
* iwpm_get_nlmsg_seq - Get the sequence number for a netlink
|
|
* message to send to the port mapper
|
|
*
|
|
* Returns the sequence number for the netlink message.
|
|
*/
|
|
int iwpm_get_nlmsg_seq(void);
|
|
|
|
/**
|
|
* iwpm_valid_client - Check if the port mapper client is valid
|
|
* @nl_client: The index of the netlink client
|
|
*
|
|
* Valid clients need to call iwpm_init() before using
|
|
* the port mapper
|
|
*/
|
|
int iwpm_valid_client(u8 nl_client);
|
|
|
|
/**
|
|
* iwpm_set_valid - Set the port mapper client to valid or not
|
|
* @nl_client: The index of the netlink client
|
|
* @valid: 1 if valid or 0 if invalid
|
|
*/
|
|
void iwpm_set_valid(u8 nl_client, int valid);
|
|
|
|
/**
|
|
* iwpm_registered_client - Check if the port mapper client is registered
|
|
* @nl_client: The index of the netlink client
|
|
*
|
|
* Call iwpm_register_pid() to register a client
|
|
*/
|
|
int iwpm_registered_client(u8 nl_client);
|
|
|
|
/**
|
|
* iwpm_set_registered - Set the port mapper client to registered or not
|
|
* @nl_client: The index of the netlink client
|
|
* @reg: 1 if registered or 0 if not
|
|
*/
|
|
void iwpm_set_registered(u8 nl_client, int reg);
|
|
|
|
/**
|
|
* iwpm_send_mapinfo - Send local and mapped IPv4/IPv6 address info of
|
|
* a client to the user space port mapper
|
|
* @nl_client: The index of the netlink client
|
|
* @iwpm_pid: The pid of the user space port mapper
|
|
*
|
|
* If successful, returns the number of sent mapping info records
|
|
*/
|
|
int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid);
|
|
|
|
/**
|
|
* iwpm_mapinfo_available - Check if any mapping info records is available
|
|
* in the hash table
|
|
*
|
|
* Returns 1 if mapping information is available, otherwise returns 0
|
|
*/
|
|
int iwpm_mapinfo_available(void);
|
|
|
|
/**
|
|
* iwpm_compare_sockaddr - Compare two sockaddr storage structs
|
|
*
|
|
* Returns 0 if they are holding the same ip/tcp address info,
|
|
* otherwise returns 1
|
|
*/
|
|
int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
|
|
struct sockaddr_storage *b_sockaddr);
|
|
|
|
/**
|
|
* iwpm_validate_nlmsg_attr - Check for NULL netlink attributes
|
|
* @nltb: Holds address of each netlink message attributes
|
|
* @nla_count: Number of netlink message attributes
|
|
*
|
|
* Returns error if any of the nla_count attributes is NULL
|
|
*/
|
|
static inline int iwpm_validate_nlmsg_attr(struct nlattr *nltb[],
|
|
int nla_count)
|
|
{
|
|
int i;
|
|
for (i = 1; i < nla_count; i++) {
|
|
if (!nltb[i])
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iwpm_create_nlmsg - Allocate skb and form a netlink message
|
|
* @nl_op: Netlink message opcode
|
|
* @nlh: Holds address of the netlink message header in skb
|
|
* @nl_client: The index of the netlink client
|
|
*
|
|
* Returns the newly allcated skb, or NULL if the tailroom of the skb
|
|
* is insufficient to store the message header and payload
|
|
*/
|
|
struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
|
|
int nl_client);
|
|
|
|
/**
|
|
* iwpm_parse_nlmsg - Validate and parse the received netlink message
|
|
* @cb: Netlink callback structure
|
|
* @policy_max: Maximum attribute type to be expected
|
|
* @nlmsg_policy: Validation policy
|
|
* @nltb: Array to store policy_max parsed elements
|
|
* @msg_type: Type of netlink message
|
|
*
|
|
* Returns 0 on success or a negative error code
|
|
*/
|
|
int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
|
|
const struct nla_policy *nlmsg_policy,
|
|
struct nlattr *nltb[], const char *msg_type);
|
|
|
|
/**
|
|
* iwpm_print_sockaddr - Print IPv4/IPv6 address and TCP port
|
|
* @sockaddr: Socket address to print
|
|
* @msg: Message to print
|
|
*/
|
|
void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg);
|
|
#endif
|