229 lines
5.8 KiB
C
229 lines
5.8 KiB
C
/*
|
|
* net/tipc/core.h: Include file for TIPC global declarations
|
|
*
|
|
* Copyright (c) 2005-2006, 2013-2018 Ericsson AB
|
|
* Copyright (c) 2005-2007, 2010-2013, Wind River Systems
|
|
* Copyright (c) 2020, Red Hat Inc
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _TIPC_CORE_H
|
|
#define _TIPC_CORE_H
|
|
|
|
#include <linux/tipc.h>
|
|
#include <linux/tipc_config.h>
|
|
#include <linux/tipc_netlink.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/string.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/in.h>
|
|
#include <linux/list.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <net/netns/generic.h>
|
|
#include <linux/rhashtable.h>
|
|
#include <net/genetlink.h>
|
|
#include <net/netns/hash.h>
|
|
|
|
#ifdef pr_fmt
|
|
#undef pr_fmt
|
|
#endif
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
struct tipc_node;
|
|
struct tipc_bearer;
|
|
struct tipc_bc_base;
|
|
struct tipc_link;
|
|
struct tipc_name_table;
|
|
struct tipc_topsrv;
|
|
struct tipc_monitor;
|
|
#ifdef CONFIG_TIPC_CRYPTO
|
|
struct tipc_crypto;
|
|
#endif
|
|
|
|
#define TIPC_MOD_VER "2.0.0"
|
|
|
|
#define NODE_HTABLE_SIZE 512
|
|
#define MAX_BEARERS 3
|
|
#define TIPC_DEF_MON_THRESHOLD 32
|
|
#define NODE_ID_LEN 16
|
|
#define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1)
|
|
|
|
extern unsigned int tipc_net_id __read_mostly;
|
|
extern int sysctl_tipc_rmem[3] __read_mostly;
|
|
extern int sysctl_tipc_named_timeout __read_mostly;
|
|
|
|
struct tipc_net {
|
|
u8 node_id[NODE_ID_LEN];
|
|
u32 node_addr;
|
|
u32 trial_addr;
|
|
unsigned long addr_trial_end;
|
|
char node_id_string[NODE_ID_STR_LEN];
|
|
int net_id;
|
|
int random;
|
|
bool legacy_addr_format;
|
|
|
|
/* Node table and node list */
|
|
spinlock_t node_list_lock;
|
|
struct hlist_head node_htable[NODE_HTABLE_SIZE];
|
|
struct list_head node_list;
|
|
u32 num_nodes;
|
|
u32 num_links;
|
|
|
|
/* Neighbor monitoring list */
|
|
struct tipc_monitor *monitors[MAX_BEARERS];
|
|
int mon_threshold;
|
|
|
|
/* Bearer list */
|
|
struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
|
|
|
|
/* Broadcast link */
|
|
spinlock_t bclock;
|
|
struct tipc_bc_base *bcbase;
|
|
struct tipc_link *bcl;
|
|
|
|
/* Socket hash table */
|
|
struct rhashtable sk_rht;
|
|
|
|
/* Name table */
|
|
spinlock_t nametbl_lock;
|
|
struct name_table *nametbl;
|
|
|
|
/* Topology subscription server */
|
|
struct tipc_topsrv *topsrv;
|
|
atomic_t subscription_count;
|
|
|
|
/* Cluster capabilities */
|
|
u16 capabilities;
|
|
|
|
/* Tracing of node internal messages */
|
|
struct packet_type loopback_pt;
|
|
|
|
#ifdef CONFIG_TIPC_CRYPTO
|
|
/* TX crypto handler */
|
|
struct tipc_crypto *crypto_tx;
|
|
#endif
|
|
/* Work item for net finalize */
|
|
struct work_struct work;
|
|
/* The numbers of work queues in schedule */
|
|
atomic_t wq_count;
|
|
};
|
|
|
|
static inline struct tipc_net *tipc_net(struct net *net)
|
|
{
|
|
return net_generic(net, tipc_net_id);
|
|
}
|
|
|
|
static inline int tipc_netid(struct net *net)
|
|
{
|
|
return tipc_net(net)->net_id;
|
|
}
|
|
|
|
static inline struct list_head *tipc_nodes(struct net *net)
|
|
{
|
|
return &tipc_net(net)->node_list;
|
|
}
|
|
|
|
static inline struct name_table *tipc_name_table(struct net *net)
|
|
{
|
|
return tipc_net(net)->nametbl;
|
|
}
|
|
|
|
static inline struct tipc_topsrv *tipc_topsrv(struct net *net)
|
|
{
|
|
return tipc_net(net)->topsrv;
|
|
}
|
|
|
|
static inline unsigned int tipc_hashfn(u32 addr)
|
|
{
|
|
return addr & (NODE_HTABLE_SIZE - 1);
|
|
}
|
|
|
|
static inline u16 mod(u16 x)
|
|
{
|
|
return x & 0xffffu;
|
|
}
|
|
|
|
static inline int less_eq(u16 left, u16 right)
|
|
{
|
|
return mod(right - left) < 32768u;
|
|
}
|
|
|
|
static inline int more(u16 left, u16 right)
|
|
{
|
|
return !less_eq(left, right);
|
|
}
|
|
|
|
static inline int less(u16 left, u16 right)
|
|
{
|
|
return less_eq(left, right) && (mod(right) != mod(left));
|
|
}
|
|
|
|
static inline int in_range(u16 val, u16 min, u16 max)
|
|
{
|
|
return !less(val, min) && !more(val, max);
|
|
}
|
|
|
|
static inline u32 tipc_net_hash_mixes(struct net *net, int tn_rand)
|
|
{
|
|
return net_hash_mix(&init_net) ^ net_hash_mix(net) ^ tn_rand;
|
|
}
|
|
|
|
static inline u32 hash128to32(char *bytes)
|
|
{
|
|
__be32 *tmp = (__be32 *)bytes;
|
|
u32 res;
|
|
|
|
res = ntohl(tmp[0] ^ tmp[1] ^ tmp[2] ^ tmp[3]);
|
|
if (likely(res))
|
|
return res;
|
|
return ntohl(tmp[0] | tmp[1] | tmp[2] | tmp[3]);
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
int tipc_register_sysctl(void);
|
|
void tipc_unregister_sysctl(void);
|
|
#else
|
|
#define tipc_register_sysctl() 0
|
|
#define tipc_unregister_sysctl()
|
|
#endif
|
|
#endif
|