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Diffstat (limited to 'net/tipc/core.h')
| -rw-r--r-- | net/tipc/core.h | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h new file mode 100644 index 000000000..7eccd97e0 --- /dev/null +++ b/net/tipc/core.h @@ -0,0 +1,228 @@ +/* + * 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 tipc_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 |