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This works in exactly the same way as the CIPSO label cache. The idea is to allow the lsm to cache the result of a secattr lookup so that it doesn't need to perform the lookup for every skbuff. It introduces two sysctl controls: calipso_cache_enable - enables/disables the cache. calipso_cache_bucket_size - sets the size of a cache bucket. Signed-off-by: Huw Davies <huw@codeweavers.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* CALIPSO - Common Architecture Label IPv6 Security Option
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*
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* This is an implementation of the CALIPSO protocol as specified in
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* RFC 5570.
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*
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* Authors: Paul Moore <paul@paul-moore.com>
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* Huw Davies <huw@codeweavers.com>
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*
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*/
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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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* (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef _CALIPSO_H
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#define _CALIPSO_H
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#include <linux/types.h>
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#include <linux/rcupdate.h>
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#include <linux/list.h>
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#include <linux/net.h>
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#include <linux/skbuff.h>
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#include <net/netlabel.h>
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#include <net/request_sock.h>
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#include <linux/atomic.h>
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#include <asm/unaligned.h>
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/* known doi values */
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#define CALIPSO_DOI_UNKNOWN 0x00000000
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/* doi mapping types */
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#define CALIPSO_MAP_UNKNOWN 0
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#define CALIPSO_MAP_PASS 2
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/*
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* CALIPSO DOI definitions
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*/
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/* DOI definition struct */
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struct calipso_doi {
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u32 doi;
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u32 type;
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atomic_t refcount;
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struct list_head list;
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struct rcu_head rcu;
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};
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/*
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* Sysctl Variables
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*/
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extern int calipso_cache_enabled;
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extern int calipso_cache_bucketsize;
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#ifdef CONFIG_NETLABEL
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int __init calipso_init(void);
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void calipso_exit(void);
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bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);
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#else
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static inline int __init calipso_init(void)
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{
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return 0;
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}
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static inline void calipso_exit(void)
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{
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}
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static inline bool calipso_validate(const struct sk_buff *skb,
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const unsigned char *option)
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{
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return true;
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}
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#endif /* CONFIG_NETLABEL */
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#endif /* _CALIPSO_H */
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