191 lines
5.2 KiB
C
191 lines
5.2 KiB
C
/* Please avoid adding hacks here - instead add it to mac80211/backports.git */
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#undef CONFIG_MODULE_STRIPPED
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#include <linux/version.h> /* LINUX_VERSION_CODE */
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#include <linux/types.h>
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#if LINUX_VERSION_IS_LESS(5, 10, 0)
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#include <linux/if_bridge.h>
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struct batadv_br_ip {
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union {
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__be32 ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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struct in6_addr ip6;
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#endif
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} dst;
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__be16 proto;
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__u16 vid;
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};
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struct batadv_br_ip_list {
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struct list_head list;
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struct batadv_br_ip addr;
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};
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#if 0
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/* "static" dropped to force compiler to evaluate it as part of multicast.c
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* might need to be added again and then called in some kind of dummy
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* compat.c in case this header is included in multiple files.
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*/
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inline void __batadv_br_ip_list_check(void)
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{
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BUILD_BUG_ON(sizeof(struct batadv_br_ip_list) != sizeof(struct br_ip_list));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip_list, list) != offsetof(struct br_ip_list, list));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip_list, addr) != offsetof(struct br_ip_list, addr));
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BUILD_BUG_ON(sizeof(struct batadv_br_ip) != sizeof(struct br_ip));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip, dst.ip4) != offsetof(struct br_ip, u.ip4));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip, dst.ip6) != offsetof(struct br_ip, u.ip6));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip, proto) != offsetof(struct br_ip, proto));
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BUILD_BUG_ON(offsetof(struct batadv_br_ip, vid) != offsetof(struct br_ip, vid));
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}
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#endif
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#define br_ip batadv_br_ip
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#define br_ip_list batadv_br_ip_list
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#endif /* LINUX_VERSION_IS_LESS(5, 10, 0) */
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#if LINUX_VERSION_IS_LESS(5, 14, 0)
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#include <linux/if_bridge.h>
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#include <net/addrconf.h>
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#if IS_ENABLED(CONFIG_IPV6)
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static inline bool
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br_multicast_has_router_adjacent(struct net_device *dev, int proto)
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{
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struct list_head bridge_mcast_list = LIST_HEAD_INIT(bridge_mcast_list);
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struct br_ip_list *br_ip_entry, *tmp;
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int ret;
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if (proto != ETH_P_IPV6)
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return true;
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ret = br_multicast_list_adjacent(dev, &bridge_mcast_list);
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if (ret < 0)
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return true;
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ret = false;
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list_for_each_entry_safe(br_ip_entry, tmp, &bridge_mcast_list, list) {
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if (br_ip_entry->addr.proto == htons(ETH_P_IPV6) &&
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ipv6_addr_is_ll_all_routers(&br_ip_entry->addr.dst.ip6))
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ret = true;
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list_del(&br_ip_entry->list);
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kfree(br_ip_entry);
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}
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return ret;
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}
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#else
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static inline bool
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br_multicast_has_router_adjacent(struct net_device *dev, int proto)
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{
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return true;
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}
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#endif
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#endif /* LINUX_VERSION_IS_LESS(5, 14, 0) */
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#if LINUX_VERSION_IS_LESS(5, 15, 0)
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static inline void batadv_dev_put(struct net_device *dev)
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{
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if (!dev)
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return;
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dev_put(dev);
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}
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#define dev_put batadv_dev_put
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static inline void batadv_dev_hold(struct net_device *dev)
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{
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if (!dev)
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return;
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dev_hold(dev);
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}
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#define dev_hold batadv_dev_hold
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#endif /* LINUX_VERSION_IS_LESS(5, 15, 0) */
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/* <DECLARE_EWMA> */
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#include <linux/version.h>
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#include_next <linux/average.h>
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#include <linux/bug.h>
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#ifdef DECLARE_EWMA
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#undef DECLARE_EWMA
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#endif /* DECLARE_EWMA */
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/*
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* Exponentially weighted moving average (EWMA)
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*
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* This implements a fixed-precision EWMA algorithm, with both the
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* precision and fall-off coefficient determined at compile-time
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* and built into the generated helper funtions.
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*
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* The first argument to the macro is the name that will be used
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* for the struct and helper functions.
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*
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* The second argument, the precision, expresses how many bits are
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* used for the fractional part of the fixed-precision values.
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*
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* The third argument, the weight reciprocal, determines how the
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* new values will be weighed vs. the old state, new values will
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* get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
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* that this parameter must be a power of two for efficiency.
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*/
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#define DECLARE_EWMA(name, _precision, _weight_rcp) \
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struct ewma_##name { \
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unsigned long internal; \
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}; \
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static inline void ewma_##name##_init(struct ewma_##name *e) \
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{ \
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BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
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/* \
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* Even if you want to feed it just 0/1 you should have \
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* some bits for the non-fractional part... \
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*/ \
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BUILD_BUG_ON((_precision) > 30); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
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e->internal = 0; \
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} \
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static inline unsigned long \
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ewma_##name##_read(struct ewma_##name *e) \
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{ \
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BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
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BUILD_BUG_ON((_precision) > 30); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
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return e->internal >> (_precision); \
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} \
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static inline void ewma_##name##_add(struct ewma_##name *e, \
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unsigned long val) \
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{ \
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unsigned long internal = READ_ONCE(e->internal); \
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unsigned long weight_rcp = ilog2(_weight_rcp); \
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unsigned long precision = _precision; \
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\
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BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
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BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
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BUILD_BUG_ON((_precision) > 30); \
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BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
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\
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WRITE_ONCE(e->internal, internal ? \
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(((internal << weight_rcp) - internal) + \
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(val << precision)) >> weight_rcp : \
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(val << precision)); \
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}
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/* </DECLARE_EWMA> */
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