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79 lines
2.3 KiB
79 lines
2.3 KiB
/* |
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* INET An implementation of the TCP/IP protocol suite for the LINUX |
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* operating system. INET is implemented using the BSD Socket |
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* interface as the means of communication with the user level. |
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* |
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* INET protocol dispatch tables. |
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* |
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* Authors: Ross Biro |
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
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* |
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* Fixes: |
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* Alan Cox : Ahah! udp icmp errors don't work because |
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* udp_err is never called! |
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* Alan Cox : Added new fields for init and ready for |
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* proper fragmentation (_NO_ 4K limits!) |
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* Richard Colella : Hang on hash collision |
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* Vince Laviano : Modified inet_del_protocol() to correctly |
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* maintain copy bit. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version |
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* 2 of the License, or (at your option) any later version. |
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*/ |
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#include <linux/cache.h> |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/spinlock.h> |
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#include <net/protocol.h> |
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const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly; |
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const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS] __read_mostly; |
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EXPORT_SYMBOL(inet_offloads); |
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int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol) |
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{ |
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if (!prot->netns_ok) { |
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pr_err("Protocol %u is not namespace aware, cannot register.\n", |
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protocol); |
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return -EINVAL; |
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} |
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return !cmpxchg((const struct net_protocol **)&inet_protos[protocol], |
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NULL, prot) ? 0 : -1; |
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} |
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EXPORT_SYMBOL(inet_add_protocol); |
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int inet_add_offload(const struct net_offload *prot, unsigned char protocol) |
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{ |
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return !cmpxchg((const struct net_offload **)&inet_offloads[protocol], |
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NULL, prot) ? 0 : -1; |
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} |
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EXPORT_SYMBOL(inet_add_offload); |
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int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol) |
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{ |
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int ret; |
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ret = (cmpxchg((const struct net_protocol **)&inet_protos[protocol], |
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prot, NULL) == prot) ? 0 : -1; |
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synchronize_net(); |
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return ret; |
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} |
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EXPORT_SYMBOL(inet_del_protocol); |
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int inet_del_offload(const struct net_offload *prot, unsigned char protocol) |
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{ |
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int ret; |
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ret = (cmpxchg((const struct net_offload **)&inet_offloads[protocol], |
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prot, NULL) == prot) ? 0 : -1; |
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synchronize_net(); |
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return ret; |
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} |
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EXPORT_SYMBOL(inet_del_offload);
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