794 lines
22 KiB
C
794 lines
22 KiB
C
/*
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* Copyright (c) 2014 Chelsio, Inc. All rights reserved.
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* Copyright (c) 2014 Intel Corporation. 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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#define IWPM_MAPINFO_HASH_SIZE 512
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#define IWPM_MAPINFO_HASH_MASK (IWPM_MAPINFO_HASH_SIZE - 1)
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#define IWPM_REMINFO_HASH_SIZE 64
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#define IWPM_REMINFO_HASH_MASK (IWPM_REMINFO_HASH_SIZE - 1)
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#define IWPM_MSG_SIZE 512
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static LIST_HEAD(iwpm_nlmsg_req_list);
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static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock);
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static struct hlist_head *iwpm_hash_bucket;
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static DEFINE_SPINLOCK(iwpm_mapinfo_lock);
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static struct hlist_head *iwpm_reminfo_bucket;
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static DEFINE_SPINLOCK(iwpm_reminfo_lock);
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static struct iwpm_admin_data iwpm_admin;
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/**
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* iwpm_init - Allocate resources for the iwarp port mapper
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* @nl_client: The index of the netlink client
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*
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* Should be called when network interface goes up.
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*/
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int iwpm_init(u8 nl_client)
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{
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iwpm_hash_bucket = kcalloc(IWPM_MAPINFO_HASH_SIZE,
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sizeof(struct hlist_head), GFP_KERNEL);
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if (!iwpm_hash_bucket)
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return -ENOMEM;
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iwpm_reminfo_bucket = kcalloc(IWPM_REMINFO_HASH_SIZE,
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sizeof(struct hlist_head), GFP_KERNEL);
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if (!iwpm_reminfo_bucket) {
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kfree(iwpm_hash_bucket);
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return -ENOMEM;
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}
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iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
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pr_debug("%s: Mapinfo and reminfo tables are created\n", __func__);
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return 0;
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}
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static void free_hash_bucket(void);
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static void free_reminfo_bucket(void);
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/**
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* iwpm_exit - Deallocate resources for the iwarp port mapper
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* @nl_client: The index of the netlink client
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*
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* Should be called when network interface goes down.
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*/
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int iwpm_exit(u8 nl_client)
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{
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free_hash_bucket();
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free_reminfo_bucket();
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pr_debug("%s: Resources are destroyed\n", __func__);
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iwpm_set_registration(nl_client, IWPM_REG_UNDEF);
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return 0;
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}
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static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage *,
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struct sockaddr_storage *);
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/**
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* iwpm_create_mapinfo - Store local and mapped IPv4/IPv6 address
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* info in a hash table
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* @local_sockaddr: Local ip/tcp address
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* @mapped_sockaddr: Mapped local ip/tcp address
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* @nl_client: The index of the netlink client
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* @map_flags: IWPM mapping flags
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*/
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int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
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struct sockaddr_storage *mapped_sockaddr,
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u8 nl_client, u32 map_flags)
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{
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struct hlist_head *hash_bucket_head = NULL;
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struct iwpm_mapping_info *map_info;
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unsigned long flags;
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int ret = -EINVAL;
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map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL);
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if (!map_info)
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return -ENOMEM;
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memcpy(&map_info->local_sockaddr, local_sockaddr,
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sizeof(struct sockaddr_storage));
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memcpy(&map_info->mapped_sockaddr, mapped_sockaddr,
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sizeof(struct sockaddr_storage));
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map_info->nl_client = nl_client;
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map_info->map_flags = map_flags;
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spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
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if (iwpm_hash_bucket) {
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hash_bucket_head = get_mapinfo_hash_bucket(
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&map_info->local_sockaddr,
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&map_info->mapped_sockaddr);
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if (hash_bucket_head) {
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hlist_add_head(&map_info->hlist_node, hash_bucket_head);
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ret = 0;
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}
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}
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spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
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if (!hash_bucket_head)
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kfree(map_info);
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return ret;
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}
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/**
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* iwpm_remove_mapinfo - Remove local and mapped IPv4/IPv6 address
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* info from the hash table
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* @local_sockaddr: Local ip/tcp address
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* @mapped_local_addr: Mapped local ip/tcp address
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*
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* Returns err code if mapping info is not found in the hash table,
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* otherwise returns 0
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*/
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int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr,
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struct sockaddr_storage *mapped_local_addr)
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{
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struct hlist_node *tmp_hlist_node;
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struct hlist_head *hash_bucket_head;
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struct iwpm_mapping_info *map_info = NULL;
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unsigned long flags;
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int ret = -EINVAL;
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spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
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if (iwpm_hash_bucket) {
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hash_bucket_head = get_mapinfo_hash_bucket(
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local_sockaddr,
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mapped_local_addr);
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if (!hash_bucket_head)
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goto remove_mapinfo_exit;
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hlist_for_each_entry_safe(map_info, tmp_hlist_node,
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hash_bucket_head, hlist_node) {
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if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr,
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mapped_local_addr)) {
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hlist_del_init(&map_info->hlist_node);
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kfree(map_info);
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ret = 0;
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break;
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}
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}
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}
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remove_mapinfo_exit:
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spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
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return ret;
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}
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static void free_hash_bucket(void)
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{
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struct hlist_node *tmp_hlist_node;
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struct iwpm_mapping_info *map_info;
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unsigned long flags;
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int i;
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/* remove all the mapinfo data from the list */
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spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
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for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
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hlist_for_each_entry_safe(map_info, tmp_hlist_node,
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&iwpm_hash_bucket[i], hlist_node) {
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hlist_del_init(&map_info->hlist_node);
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kfree(map_info);
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}
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}
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/* free the hash list */
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kfree(iwpm_hash_bucket);
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iwpm_hash_bucket = NULL;
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spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
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}
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static void free_reminfo_bucket(void)
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{
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struct hlist_node *tmp_hlist_node;
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struct iwpm_remote_info *rem_info;
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unsigned long flags;
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int i;
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/* remove all the remote info from the list */
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spin_lock_irqsave(&iwpm_reminfo_lock, flags);
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for (i = 0; i < IWPM_REMINFO_HASH_SIZE; i++) {
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hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
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&iwpm_reminfo_bucket[i], hlist_node) {
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hlist_del_init(&rem_info->hlist_node);
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kfree(rem_info);
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}
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}
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/* free the hash list */
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kfree(iwpm_reminfo_bucket);
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iwpm_reminfo_bucket = NULL;
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spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
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}
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static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage *,
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struct sockaddr_storage *);
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void iwpm_add_remote_info(struct iwpm_remote_info *rem_info)
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{
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struct hlist_head *hash_bucket_head;
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unsigned long flags;
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spin_lock_irqsave(&iwpm_reminfo_lock, flags);
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if (iwpm_reminfo_bucket) {
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hash_bucket_head = get_reminfo_hash_bucket(
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&rem_info->mapped_loc_sockaddr,
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&rem_info->mapped_rem_sockaddr);
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if (hash_bucket_head)
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hlist_add_head(&rem_info->hlist_node, hash_bucket_head);
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}
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spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
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}
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/**
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* iwpm_get_remote_info - Get the remote connecting peer address info
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*
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* @mapped_loc_addr: Mapped local address of the listening peer
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* @mapped_rem_addr: Mapped remote address of the connecting peer
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* @remote_addr: To store the remote address of the connecting peer
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* @nl_client: The index of the netlink client
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*
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* The remote address info is retrieved and provided to the client in
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* the remote_addr. After that it is removed from the hash table
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*/
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int iwpm_get_remote_info(struct sockaddr_storage *mapped_loc_addr,
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struct sockaddr_storage *mapped_rem_addr,
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struct sockaddr_storage *remote_addr,
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u8 nl_client)
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{
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struct hlist_node *tmp_hlist_node;
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struct hlist_head *hash_bucket_head;
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struct iwpm_remote_info *rem_info = NULL;
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unsigned long flags;
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int ret = -EINVAL;
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spin_lock_irqsave(&iwpm_reminfo_lock, flags);
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if (iwpm_reminfo_bucket) {
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hash_bucket_head = get_reminfo_hash_bucket(
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mapped_loc_addr,
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mapped_rem_addr);
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if (!hash_bucket_head)
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goto get_remote_info_exit;
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hlist_for_each_entry_safe(rem_info, tmp_hlist_node,
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hash_bucket_head, hlist_node) {
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if (!iwpm_compare_sockaddr(&rem_info->mapped_loc_sockaddr,
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mapped_loc_addr) &&
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!iwpm_compare_sockaddr(&rem_info->mapped_rem_sockaddr,
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mapped_rem_addr)) {
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memcpy(remote_addr, &rem_info->remote_sockaddr,
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sizeof(struct sockaddr_storage));
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iwpm_print_sockaddr(remote_addr,
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"get_remote_info: Remote sockaddr:");
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hlist_del_init(&rem_info->hlist_node);
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kfree(rem_info);
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ret = 0;
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break;
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}
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}
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}
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get_remote_info_exit:
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spin_unlock_irqrestore(&iwpm_reminfo_lock, flags);
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return ret;
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}
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struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq,
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u8 nl_client, gfp_t gfp)
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{
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struct iwpm_nlmsg_request *nlmsg_request = NULL;
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unsigned long flags;
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nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp);
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if (!nlmsg_request)
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return NULL;
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spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
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list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list);
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spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
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kref_init(&nlmsg_request->kref);
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kref_get(&nlmsg_request->kref);
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nlmsg_request->nlmsg_seq = nlmsg_seq;
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nlmsg_request->nl_client = nl_client;
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nlmsg_request->request_done = 0;
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nlmsg_request->err_code = 0;
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sema_init(&nlmsg_request->sem, 1);
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down(&nlmsg_request->sem);
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return nlmsg_request;
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}
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void iwpm_free_nlmsg_request(struct kref *kref)
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{
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struct iwpm_nlmsg_request *nlmsg_request;
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unsigned long flags;
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nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref);
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spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
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list_del_init(&nlmsg_request->inprocess_list);
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spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
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if (!nlmsg_request->request_done)
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pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n",
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__func__, nlmsg_request->nlmsg_seq);
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kfree(nlmsg_request);
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}
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struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq)
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{
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struct iwpm_nlmsg_request *nlmsg_request;
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struct iwpm_nlmsg_request *found_request = NULL;
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unsigned long flags;
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spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags);
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list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list,
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inprocess_list) {
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if (nlmsg_request->nlmsg_seq == echo_seq) {
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found_request = nlmsg_request;
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kref_get(&nlmsg_request->kref);
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break;
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}
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}
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spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags);
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return found_request;
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}
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int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request)
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{
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int ret;
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ret = down_timeout(&nlmsg_request->sem, IWPM_NL_TIMEOUT);
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if (ret) {
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ret = -EINVAL;
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pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n",
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__func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq);
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} else {
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ret = nlmsg_request->err_code;
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}
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kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request);
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return ret;
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}
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int iwpm_get_nlmsg_seq(void)
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{
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return atomic_inc_return(&iwpm_admin.nlmsg_seq);
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}
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/* valid client */
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u32 iwpm_get_registration(u8 nl_client)
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{
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return iwpm_admin.reg_list[nl_client];
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}
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/* valid client */
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void iwpm_set_registration(u8 nl_client, u32 reg)
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{
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iwpm_admin.reg_list[nl_client] = reg;
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}
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/* valid client */
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u32 iwpm_check_registration(u8 nl_client, u32 reg)
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{
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return (iwpm_get_registration(nl_client) & reg);
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}
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int iwpm_compare_sockaddr(struct sockaddr_storage *a_sockaddr,
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struct sockaddr_storage *b_sockaddr)
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{
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if (a_sockaddr->ss_family != b_sockaddr->ss_family)
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return 1;
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if (a_sockaddr->ss_family == AF_INET) {
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struct sockaddr_in *a4_sockaddr =
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(struct sockaddr_in *)a_sockaddr;
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struct sockaddr_in *b4_sockaddr =
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(struct sockaddr_in *)b_sockaddr;
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if (!memcmp(&a4_sockaddr->sin_addr,
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&b4_sockaddr->sin_addr, sizeof(struct in_addr))
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&& a4_sockaddr->sin_port == b4_sockaddr->sin_port)
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return 0;
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} else if (a_sockaddr->ss_family == AF_INET6) {
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struct sockaddr_in6 *a6_sockaddr =
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(struct sockaddr_in6 *)a_sockaddr;
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struct sockaddr_in6 *b6_sockaddr =
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(struct sockaddr_in6 *)b_sockaddr;
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if (!memcmp(&a6_sockaddr->sin6_addr,
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&b6_sockaddr->sin6_addr, sizeof(struct in6_addr))
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&& a6_sockaddr->sin6_port == b6_sockaddr->sin6_port)
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return 0;
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} else {
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pr_err("%s: Invalid sockaddr family\n", __func__);
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}
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return 1;
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}
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struct sk_buff *iwpm_create_nlmsg(u32 nl_op, struct nlmsghdr **nlh,
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int nl_client)
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{
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struct sk_buff *skb = NULL;
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skb = dev_alloc_skb(IWPM_MSG_SIZE);
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if (!skb)
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goto create_nlmsg_exit;
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if (!(ibnl_put_msg(skb, nlh, 0, 0, nl_client, nl_op,
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NLM_F_REQUEST))) {
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pr_warn("%s: Unable to put the nlmsg header\n", __func__);
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dev_kfree_skb(skb);
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skb = NULL;
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}
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create_nlmsg_exit:
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return skb;
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}
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int iwpm_parse_nlmsg(struct netlink_callback *cb, int policy_max,
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const struct nla_policy *nlmsg_policy,
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struct nlattr *nltb[], const char *msg_type)
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{
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int nlh_len = 0;
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int ret;
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const char *err_str = "";
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ret = nlmsg_validate_deprecated(cb->nlh, nlh_len, policy_max - 1,
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nlmsg_policy, NULL);
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if (ret) {
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err_str = "Invalid attribute";
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goto parse_nlmsg_error;
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}
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ret = nlmsg_parse_deprecated(cb->nlh, nlh_len, nltb, policy_max - 1,
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nlmsg_policy, NULL);
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if (ret) {
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err_str = "Unable to parse the nlmsg";
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goto parse_nlmsg_error;
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}
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ret = iwpm_validate_nlmsg_attr(nltb, policy_max);
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if (ret) {
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err_str = "Invalid NULL attribute";
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goto parse_nlmsg_error;
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}
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return 0;
|
|
parse_nlmsg_error:
|
|
pr_warn("%s: %s (msg type %s ret = %d)\n",
|
|
__func__, err_str, msg_type, ret);
|
|
return ret;
|
|
}
|
|
|
|
void iwpm_print_sockaddr(struct sockaddr_storage *sockaddr, char *msg)
|
|
{
|
|
struct sockaddr_in6 *sockaddr_v6;
|
|
struct sockaddr_in *sockaddr_v4;
|
|
|
|
switch (sockaddr->ss_family) {
|
|
case AF_INET:
|
|
sockaddr_v4 = (struct sockaddr_in *)sockaddr;
|
|
pr_debug("%s IPV4 %pI4: %u(0x%04X)\n",
|
|
msg, &sockaddr_v4->sin_addr,
|
|
ntohs(sockaddr_v4->sin_port),
|
|
ntohs(sockaddr_v4->sin_port));
|
|
break;
|
|
case AF_INET6:
|
|
sockaddr_v6 = (struct sockaddr_in6 *)sockaddr;
|
|
pr_debug("%s IPV6 %pI6: %u(0x%04X)\n",
|
|
msg, &sockaddr_v6->sin6_addr,
|
|
ntohs(sockaddr_v6->sin6_port),
|
|
ntohs(sockaddr_v6->sin6_port));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static u32 iwpm_ipv6_jhash(struct sockaddr_in6 *ipv6_sockaddr)
|
|
{
|
|
u32 ipv6_hash = jhash(&ipv6_sockaddr->sin6_addr, sizeof(struct in6_addr), 0);
|
|
u32 hash = jhash_2words(ipv6_hash, (__force u32) ipv6_sockaddr->sin6_port, 0);
|
|
return hash;
|
|
}
|
|
|
|
static u32 iwpm_ipv4_jhash(struct sockaddr_in *ipv4_sockaddr)
|
|
{
|
|
u32 ipv4_hash = jhash(&ipv4_sockaddr->sin_addr, sizeof(struct in_addr), 0);
|
|
u32 hash = jhash_2words(ipv4_hash, (__force u32) ipv4_sockaddr->sin_port, 0);
|
|
return hash;
|
|
}
|
|
|
|
static int get_hash_bucket(struct sockaddr_storage *a_sockaddr,
|
|
struct sockaddr_storage *b_sockaddr, u32 *hash)
|
|
{
|
|
u32 a_hash, b_hash;
|
|
|
|
if (a_sockaddr->ss_family == AF_INET) {
|
|
a_hash = iwpm_ipv4_jhash((struct sockaddr_in *) a_sockaddr);
|
|
b_hash = iwpm_ipv4_jhash((struct sockaddr_in *) b_sockaddr);
|
|
|
|
} else if (a_sockaddr->ss_family == AF_INET6) {
|
|
a_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) a_sockaddr);
|
|
b_hash = iwpm_ipv6_jhash((struct sockaddr_in6 *) b_sockaddr);
|
|
} else {
|
|
pr_err("%s: Invalid sockaddr family\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (a_hash == b_hash) /* if port mapper isn't available */
|
|
*hash = a_hash;
|
|
else
|
|
*hash = jhash_2words(a_hash, b_hash, 0);
|
|
return 0;
|
|
}
|
|
|
|
static struct hlist_head *get_mapinfo_hash_bucket(struct sockaddr_storage
|
|
*local_sockaddr, struct sockaddr_storage
|
|
*mapped_sockaddr)
|
|
{
|
|
u32 hash;
|
|
int ret;
|
|
|
|
ret = get_hash_bucket(local_sockaddr, mapped_sockaddr, &hash);
|
|
if (ret)
|
|
return NULL;
|
|
return &iwpm_hash_bucket[hash & IWPM_MAPINFO_HASH_MASK];
|
|
}
|
|
|
|
static struct hlist_head *get_reminfo_hash_bucket(struct sockaddr_storage
|
|
*mapped_loc_sockaddr, struct sockaddr_storage
|
|
*mapped_rem_sockaddr)
|
|
{
|
|
u32 hash;
|
|
int ret;
|
|
|
|
ret = get_hash_bucket(mapped_loc_sockaddr, mapped_rem_sockaddr, &hash);
|
|
if (ret)
|
|
return NULL;
|
|
return &iwpm_reminfo_bucket[hash & IWPM_REMINFO_HASH_MASK];
|
|
}
|
|
|
|
static int send_mapinfo_num(u32 mapping_num, u8 nl_client, int iwpm_pid)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
struct nlmsghdr *nlh;
|
|
u32 msg_seq;
|
|
const char *err_str = "";
|
|
int ret = -EINVAL;
|
|
|
|
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_MAPINFO_NUM, &nlh, nl_client);
|
|
if (!skb) {
|
|
err_str = "Unable to create a nlmsg";
|
|
goto mapinfo_num_error;
|
|
}
|
|
nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
|
|
msg_seq = 0;
|
|
err_str = "Unable to put attribute of mapinfo number nlmsg";
|
|
ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_MAPINFO_SEQ);
|
|
if (ret)
|
|
goto mapinfo_num_error;
|
|
ret = ibnl_put_attr(skb, nlh, sizeof(u32),
|
|
&mapping_num, IWPM_NLA_MAPINFO_SEND_NUM);
|
|
if (ret)
|
|
goto mapinfo_num_error;
|
|
|
|
nlmsg_end(skb, nlh);
|
|
|
|
ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
|
|
if (ret) {
|
|
skb = NULL;
|
|
err_str = "Unable to send a nlmsg";
|
|
goto mapinfo_num_error;
|
|
}
|
|
pr_debug("%s: Sent mapping number = %u\n", __func__, mapping_num);
|
|
return 0;
|
|
mapinfo_num_error:
|
|
pr_info("%s: %s\n", __func__, err_str);
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static int send_nlmsg_done(struct sk_buff *skb, u8 nl_client, int iwpm_pid)
|
|
{
|
|
struct nlmsghdr *nlh = NULL;
|
|
int ret = 0;
|
|
|
|
if (!skb)
|
|
return ret;
|
|
if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
|
|
RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
|
|
pr_warn("%s Unable to put NLMSG_DONE\n", __func__);
|
|
dev_kfree_skb(skb);
|
|
return -ENOMEM;
|
|
}
|
|
nlh->nlmsg_type = NLMSG_DONE;
|
|
ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
|
|
if (ret)
|
|
pr_warn("%s Unable to send a nlmsg\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
int iwpm_send_mapinfo(u8 nl_client, int iwpm_pid)
|
|
{
|
|
struct iwpm_mapping_info *map_info;
|
|
struct sk_buff *skb = NULL;
|
|
struct nlmsghdr *nlh;
|
|
int skb_num = 0, mapping_num = 0;
|
|
int i = 0, nlmsg_bytes = 0;
|
|
unsigned long flags;
|
|
const char *err_str = "";
|
|
int ret;
|
|
|
|
skb = dev_alloc_skb(NLMSG_GOODSIZE);
|
|
if (!skb) {
|
|
ret = -ENOMEM;
|
|
err_str = "Unable to allocate skb";
|
|
goto send_mapping_info_exit;
|
|
}
|
|
skb_num++;
|
|
spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
|
|
ret = -EINVAL;
|
|
for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
|
|
hlist_for_each_entry(map_info, &iwpm_hash_bucket[i],
|
|
hlist_node) {
|
|
if (map_info->nl_client != nl_client)
|
|
continue;
|
|
nlh = NULL;
|
|
if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
|
|
RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
|
|
ret = -ENOMEM;
|
|
err_str = "Unable to put the nlmsg header";
|
|
goto send_mapping_info_unlock;
|
|
}
|
|
err_str = "Unable to put attribute of the nlmsg";
|
|
ret = ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_storage),
|
|
&map_info->local_sockaddr,
|
|
IWPM_NLA_MAPINFO_LOCAL_ADDR);
|
|
if (ret)
|
|
goto send_mapping_info_unlock;
|
|
|
|
ret = ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_storage),
|
|
&map_info->mapped_sockaddr,
|
|
IWPM_NLA_MAPINFO_MAPPED_ADDR);
|
|
if (ret)
|
|
goto send_mapping_info_unlock;
|
|
|
|
if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
|
|
ret = ibnl_put_attr(skb, nlh, sizeof(u32),
|
|
&map_info->map_flags,
|
|
IWPM_NLA_MAPINFO_FLAGS);
|
|
if (ret)
|
|
goto send_mapping_info_unlock;
|
|
}
|
|
|
|
nlmsg_end(skb, nlh);
|
|
|
|
iwpm_print_sockaddr(&map_info->local_sockaddr,
|
|
"send_mapping_info: Local sockaddr:");
|
|
iwpm_print_sockaddr(&map_info->mapped_sockaddr,
|
|
"send_mapping_info: Mapped local sockaddr:");
|
|
mapping_num++;
|
|
nlmsg_bytes += nlh->nlmsg_len;
|
|
|
|
/* check if all mappings can fit in one skb */
|
|
if (NLMSG_GOODSIZE - nlmsg_bytes < nlh->nlmsg_len * 2) {
|
|
/* and leave room for NLMSG_DONE */
|
|
nlmsg_bytes = 0;
|
|
skb_num++;
|
|
spin_unlock_irqrestore(&iwpm_mapinfo_lock,
|
|
flags);
|
|
/* send the skb */
|
|
ret = send_nlmsg_done(skb, nl_client, iwpm_pid);
|
|
skb = NULL;
|
|
if (ret) {
|
|
err_str = "Unable to send map info";
|
|
goto send_mapping_info_exit;
|
|
}
|
|
if (skb_num == IWPM_MAPINFO_SKB_COUNT) {
|
|
ret = -ENOMEM;
|
|
err_str = "Insufficient skbs for map info";
|
|
goto send_mapping_info_exit;
|
|
}
|
|
skb = dev_alloc_skb(NLMSG_GOODSIZE);
|
|
if (!skb) {
|
|
ret = -ENOMEM;
|
|
err_str = "Unable to allocate skb";
|
|
goto send_mapping_info_exit;
|
|
}
|
|
spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
|
|
}
|
|
}
|
|
}
|
|
send_mapping_info_unlock:
|
|
spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
|
|
send_mapping_info_exit:
|
|
if (ret) {
|
|
pr_warn("%s: %s (ret = %d)\n", __func__, err_str, ret);
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
send_nlmsg_done(skb, nl_client, iwpm_pid);
|
|
return send_mapinfo_num(mapping_num, nl_client, iwpm_pid);
|
|
}
|
|
|
|
int iwpm_mapinfo_available(void)
|
|
{
|
|
unsigned long flags;
|
|
int full_bucket = 0, i = 0;
|
|
|
|
spin_lock_irqsave(&iwpm_mapinfo_lock, flags);
|
|
if (iwpm_hash_bucket) {
|
|
for (i = 0; i < IWPM_MAPINFO_HASH_SIZE; i++) {
|
|
if (!hlist_empty(&iwpm_hash_bucket[i])) {
|
|
full_bucket = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
|
|
return full_bucket;
|
|
}
|
|
|
|
int iwpm_send_hello(u8 nl_client, int iwpm_pid, u16 abi_version)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
struct nlmsghdr *nlh;
|
|
const char *err_str;
|
|
int ret = -EINVAL;
|
|
|
|
skb = iwpm_create_nlmsg(RDMA_NL_IWPM_HELLO, &nlh, nl_client);
|
|
if (!skb) {
|
|
err_str = "Unable to create a nlmsg";
|
|
goto hello_num_error;
|
|
}
|
|
nlh->nlmsg_seq = iwpm_get_nlmsg_seq();
|
|
err_str = "Unable to put attribute of abi_version into nlmsg";
|
|
ret = ibnl_put_attr(skb, nlh, sizeof(u16), &abi_version,
|
|
IWPM_NLA_HELLO_ABI_VERSION);
|
|
if (ret)
|
|
goto hello_num_error;
|
|
nlmsg_end(skb, nlh);
|
|
|
|
ret = rdma_nl_unicast(&init_net, skb, iwpm_pid);
|
|
if (ret) {
|
|
skb = NULL;
|
|
err_str = "Unable to send a nlmsg";
|
|
goto hello_num_error;
|
|
}
|
|
pr_debug("%s: Sent hello abi_version = %u\n", __func__, abi_version);
|
|
return 0;
|
|
hello_num_error:
|
|
pr_info("%s: %s\n", __func__, err_str);
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|