207 lines
5.9 KiB
C
207 lines
5.9 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_CODE < KERNEL_VERSION(4, 15, 0)
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#include <linux/netdevice.h>
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#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
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BUILD_BUG_ON(extack != NULL); \
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netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info); \
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})
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#endif /* < KERNEL_VERSION(4, 15, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0)
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#include_next <linux/igmp.h>
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#include_next <net/addrconf.h>
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static inline int batadv_ipv6_mc_check_mld1(struct sk_buff *skb)
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{
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return ipv6_mc_check_mld(skb, NULL);
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}
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static inline int batadv_ipv6_mc_check_mld2(struct sk_buff *skb,
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struct sk_buff **skb_trimmed)
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{
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return ipv6_mc_check_mld(skb, skb_trimmed);
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}
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#define ipv6_mc_check_mld_get(_1, _2, ipv6_mc_check_mld_name, ...) ipv6_mc_check_mld_name
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#define ipv6_mc_check_mld(...) \
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ipv6_mc_check_mld_get(__VA_ARGS__, batadv_ipv6_mc_check_mld2, batadv_ipv6_mc_check_mld1)(__VA_ARGS__)
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static inline int batadv_ip_mc_check_igmp1(struct sk_buff *skb)
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{
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return ip_mc_check_igmp(skb, NULL);
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}
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static inline int batadv_ip_mc_check_igmp2(struct sk_buff *skb,
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struct sk_buff **skb_trimmed)
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{
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return ip_mc_check_igmp(skb, skb_trimmed);
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}
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#define ip_mc_check_igmp_get(_1, _2, ip_mc_check_igmp_name, ...) ip_mc_check_igmp_name
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#define ip_mc_check_igmp(...) \
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ip_mc_check_igmp_get(__VA_ARGS__, batadv_ip_mc_check_igmp2, batadv_ip_mc_check_igmp1)(__VA_ARGS__)
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#endif /* < KERNEL_VERSION(5, 1, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
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#include_next <linux/cache.h>
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/* hack for netlink.c which marked the family ops as ro */
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#ifdef __ro_after_init
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#undef __ro_after_init
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#endif
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#define __ro_after_init
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#endif /* < KERNEL_VERSION(4, 10, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
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#include <linux/netdevice.h>
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/* work around missing attribute needs_free_netdev and priv_destructor in
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* net_device
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*/
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#define ether_setup(dev) \
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void batadv_softif_free2(struct net_device *dev) \
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{ \
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batadv_softif_free(dev); \
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free_netdev(dev); \
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} \
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void (*t1)(struct net_device *dev) __attribute__((unused)); \
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bool t2 __attribute__((unused)); \
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ether_setup(dev)
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#define needs_free_netdev destructor = batadv_softif_free2; t2
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#define priv_destructor destructor = batadv_softif_free2; t1
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#endif /* < KERNEL_VERSION(4, 11, 9) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
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#define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
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batadv_softif_slave_add(__dev, __slave_dev)
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#endif /* < KERNEL_VERSION(4, 15, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
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static inline int batadv_access_ok(int type, const void __user *p,
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unsigned long size)
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{
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return access_ok(type, p, size);
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}
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#ifdef access_ok
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#undef access_ok
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#endif
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#define access_ok_get(_1, _2, _3 , access_ok_name, ...) access_ok_name
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#define access_ok(...) \
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access_ok_get(__VA_ARGS__, access_ok3, access_ok2)(__VA_ARGS__)
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#define access_ok2(addr, size) batadv_access_ok(VERIFY_WRITE, (addr), (size))
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#define access_ok3(type, addr, size) batadv_access_ok((type), (addr), (size))
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#endif /* < KERNEL_VERSION(5, 0, 0) */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0)
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#ifndef fallthrough
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#if __GNUC__ > 7 && !defined(__CHECKER__)
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# define fallthrough __attribute__((__fallthrough__))
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#else
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# define fallthrough do {} while (0) /* fallthrough */
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#endif
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#endif
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#endif /* < KERNEL_VERSION(5, 4, 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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