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