4c1342d967
The other dst_cache_{get,set}_ip{4,6} functions, and the doc comment for
dst_cache_set_ip6 use 'saddr' for their source address parameter. Rename
the parameter to increase consistency.
This fixes the following kernel-doc warnings:
./include/net/dst_cache.h:58: warning: Function parameter or member 'addr' not described in 'dst_cache_set_ip6'
./include/net/dst_cache.h:58: warning: Excess function parameter 'saddr' description in 'dst_cache_set_ip6'
Fixes: 911362c70d ("net: add dst_cache support")
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _NET_DST_CACHE_H
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#define _NET_DST_CACHE_H
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#include <linux/jiffies.h>
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#include <net/dst.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/ip6_fib.h>
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#endif
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struct dst_cache {
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struct dst_cache_pcpu __percpu *cache;
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unsigned long reset_ts;
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};
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/**
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* dst_cache_get - perform cache lookup
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* @dst_cache: the cache
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*
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* The caller should use dst_cache_get_ip4() if it need to retrieve the
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* source address to be used when xmitting to the cached dst.
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* local BH must be disabled.
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*/
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struct dst_entry *dst_cache_get(struct dst_cache *dst_cache);
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/**
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* dst_cache_get_ip4 - perform cache lookup and fetch ipv4 source address
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* @dst_cache: the cache
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* @saddr: return value for the retrieved source address
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*
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* local BH must be disabled.
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*/
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struct rtable *dst_cache_get_ip4(struct dst_cache *dst_cache, __be32 *saddr);
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/**
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* dst_cache_set_ip4 - store the ipv4 dst into the cache
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* @dst_cache: the cache
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* @dst: the entry to be cached
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* @saddr: the source address to be stored inside the cache
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*
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* local BH must be disabled.
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*/
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void dst_cache_set_ip4(struct dst_cache *dst_cache, struct dst_entry *dst,
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__be32 saddr);
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#if IS_ENABLED(CONFIG_IPV6)
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/**
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* dst_cache_set_ip6 - store the ipv6 dst into the cache
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* @dst_cache: the cache
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* @dst: the entry to be cached
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* @saddr: the source address to be stored inside the cache
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*
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* local BH must be disabled.
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*/
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void dst_cache_set_ip6(struct dst_cache *dst_cache, struct dst_entry *dst,
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const struct in6_addr *saddr);
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/**
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* dst_cache_get_ip6 - perform cache lookup and fetch ipv6 source address
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* @dst_cache: the cache
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* @saddr: return value for the retrieved source address
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*
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* local BH must be disabled.
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*/
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struct dst_entry *dst_cache_get_ip6(struct dst_cache *dst_cache,
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struct in6_addr *saddr);
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#endif
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/**
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* dst_cache_reset - invalidate the cache contents
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* @dst_cache: the cache
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*
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* This does not free the cached dst to avoid races and contentions.
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* the dst will be freed on later cache lookup.
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*/
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static inline void dst_cache_reset(struct dst_cache *dst_cache)
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{
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dst_cache->reset_ts = jiffies;
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}
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/**
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* dst_cache_init - initialize the cache, allocating the required storage
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* @dst_cache: the cache
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* @gfp: allocation flags
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*/
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int dst_cache_init(struct dst_cache *dst_cache, gfp_t gfp);
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/**
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* dst_cache_destroy - empty the cache and free the allocated storage
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* @dst_cache: the cache
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*
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* No synchronization is enforced: it must be called only when the cache
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* is unsed.
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*/
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void dst_cache_destroy(struct dst_cache *dst_cache);
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#endif
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