1 /* Please avoid adding hacks here - instead add it to mac80211/backports.git */
3 #undef CONFIG_MODULE_STRIPPED
5 #include <linux/version.h> /* LINUX_VERSION_CODE */
6 #include <linux/types.h>
8 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
10 #define dev_get_iflink(_net_dev) ((_net_dev)->iflink)
12 #endif /* < KERNEL_VERSION(4, 1, 0) */
14 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
16 #include <linux/netdevice.h>
18 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
19 BUILD_BUG_ON(upper_priv != NULL); \
20 BUILD_BUG_ON(upper_info != NULL); \
21 BUILD_BUG_ON(extack != NULL); \
22 netdev_master_upper_dev_link(dev, upper_dev); \
25 #elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
27 #include <linux/netdevice.h>
29 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
30 BUILD_BUG_ON(extack != NULL); \
31 netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info); \
34 #endif /* < KERNEL_VERSION(4, 5, 0) */
37 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
39 /* for batadv_v_elp_get_throughput which would have used
40 * STATION_INFO_EXPECTED_THROUGHPUT in Linux 4.0.0
42 #define NL80211_STA_INFO_EXPECTED_THROUGHPUT 28
44 /* wild hack for batadv_getlink_net only */
45 #define get_link_net get_xstats_size || 1 ? fallback_net : (struct net*)netdev->rtnl_link_ops->get_xstats_size
47 #endif /* < KERNEL_VERSION(4, 0, 0) */
50 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
52 struct sk_buff
*skb_checksum_trimmed(struct sk_buff
*skb
,
53 unsigned int transport_len
,
54 __sum16(*skb_chkf
)(struct sk_buff
*skb
));
56 int ip_mc_check_igmp(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
58 int ipv6_mc_check_mld(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
60 #endif /* < KERNEL_VERSION(4, 2, 0) */
62 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
64 #define IFF_NO_QUEUE 0; dev->tx_queue_len = 0
66 static inline bool hlist_fake(struct hlist_node
*h
)
68 return h
->pprev
== &h
->next
;
71 #endif /* < KERNEL_VERSION(4, 3, 0) */
73 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
75 #include <linux/ethtool.h>
77 #define ethtool_link_ksettings batadv_ethtool_link_ksettings
79 struct batadv_ethtool_link_ksettings
{
87 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
88 batadv_ethtool_get_link_ksettings(__dev, __link_settings)
91 batadv_ethtool_get_link_ksettings(struct net_device
*dev
,
92 struct ethtool_link_ksettings
*link_ksettings
)
94 struct ethtool_cmd cmd
;
97 memset(&cmd
, 0, sizeof(cmd
));
98 ret
= __ethtool_get_settings(dev
, &cmd
);
103 link_ksettings
->base
.duplex
= cmd
.duplex
;
104 link_ksettings
->base
.speed
= ethtool_cmd_speed(&cmd
);
105 link_ksettings
->base
.autoneg
= cmd
.autoneg
;
110 #endif /* < KERNEL_VERSION(4, 6, 0) */
112 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
114 #ifdef netif_trans_update
115 #undef netif_trans_update
118 #define netif_trans_update batadv_netif_trans_update
119 static inline void batadv_netif_trans_update(struct net_device
*dev
)
121 dev
->trans_start
= jiffies
;
124 #endif /* < KERNEL_VERSION(4, 7, 0) */
127 #include_next <linux/netlink.h>
129 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
131 #include_next <net/netlink.h>
133 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff
*skb
);
135 static inline int batadv_nla_align_64bit(struct sk_buff
*skb
, int padattr
)
137 if (batadv_nla_need_padding_for_64bit(skb
) &&
138 !nla_reserve(skb
, padattr
, 0))
144 static inline struct nlattr
*batadv__nla_reserve_64bit(struct sk_buff
*skb
,
146 int attrlen
, int padattr
)
148 if (batadv_nla_need_padding_for_64bit(skb
))
149 batadv_nla_align_64bit(skb
, padattr
);
151 return __nla_reserve(skb
, attrtype
, attrlen
);
154 static inline void batadv__nla_put_64bit(struct sk_buff
*skb
, int attrtype
,
155 int attrlen
, const void *data
,
160 nla
= batadv__nla_reserve_64bit(skb
, attrtype
, attrlen
, padattr
);
161 memcpy(nla_data(nla
), data
, attrlen
);
164 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff
*skb
)
166 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
167 /* The nlattr header is 4 bytes in size, that's why we test
168 * if the skb->data _is_ aligned. A NOP attribute, plus
169 * nlattr header for next attribute, will make nla_data()
172 if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb
), 8))
178 static inline int batadv_nla_total_size_64bit(int payload
)
180 return NLA_ALIGN(nla_attr_size(payload
))
181 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
182 + NLA_ALIGN(nla_attr_size(0))
187 static inline int batadv_nla_put_64bit(struct sk_buff
*skb
, int attrtype
,
188 int attrlen
, const void *data
,
193 if (batadv_nla_need_padding_for_64bit(skb
))
194 len
= batadv_nla_total_size_64bit(attrlen
);
196 len
= nla_total_size(attrlen
);
197 if (unlikely(skb_tailroom(skb
) < len
))
200 batadv__nla_put_64bit(skb
, attrtype
, attrlen
, data
, padattr
);
204 #ifdef nla_put_u64_64bit
205 #undef nla_put_u64_64bit
208 #define nla_put_u64_64bit(_skb, _attrtype, _value, _padattr) \
209 batadv_nla_put_u64_64bit(_skb, _attrtype, _value, _padattr)
210 static inline int batadv_nla_put_u64_64bit(struct sk_buff
*skb
, int attrtype
,
211 u64 value
, int padattr
)
213 return batadv_nla_put_64bit(skb
, attrtype
, sizeof(u64
), &value
,
217 #endif /* < KERNEL_VERSION(4, 7, 0) */
220 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
222 #include_next <linux/cache.h>
224 /* hack for netlink.c which marked the family ops as ro */
225 #ifdef __ro_after_init
226 #undef __ro_after_init
228 #define __ro_after_init
230 #endif /* < KERNEL_VERSION(4, 10, 0) */
232 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
234 #include <linux/netdevice.h>
236 /* work around missing attribute needs_free_netdev and priv_destructor in
239 #define ether_setup(dev) \
240 void batadv_softif_free2(struct net_device *dev) \
242 batadv_softif_free(dev); \
245 void (*t1)(struct net_device *dev) __attribute__((unused)); \
246 bool t2 __attribute__((unused)); \
248 #define needs_free_netdev destructor = batadv_softif_free2; t2
249 #define priv_destructor destructor = batadv_softif_free2; t1
251 #endif /* < KERNEL_VERSION(4, 11, 9) */
253 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
255 static inline void *batadv_skb_put(struct sk_buff
*skb
, unsigned int len
)
257 return (void *)skb_put(skb
, len
);
263 #define skb_put batadv_skb_put
265 static inline void *batadv_skb_put_zero(struct sk_buff
*skb
, unsigned int len
)
267 void *tmp
= skb_put(skb
, len
);
277 #define skb_put_zero batadv_skb_put_zero
279 static inline void *batadv_skb_put_data(struct sk_buff
*skb
, const void *data
,
282 void *tmp
= skb_put(skb
, len
);
284 memcpy(tmp
, data
, len
);
292 #define skb_put_data batadv_skb_put_data
294 #endif /* < KERNEL_VERSION(4, 13, 0) */
296 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
298 #define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
299 batadv_softif_slave_add(__dev, __slave_dev)
301 #endif /* < KERNEL_VERSION(4, 15, 0) */
305 #define TIMER_DATA_TYPE unsigned long
306 #define TIMER_FUNC_TYPE void (*)(TIMER_DATA_TYPE)
308 static inline void timer_setup(struct timer_list
*timer
,
309 void (*callback
)(struct timer_list
*),
312 __setup_timer(timer
, (TIMER_FUNC_TYPE
)callback
,
313 (TIMER_DATA_TYPE
)timer
, flags
);
316 #define from_timer(var, callback_timer, timer_fieldname) \
317 container_of(callback_timer, typeof(*var), timer_fieldname)
319 #endif /* !from_timer */
321 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
324 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
326 #include <net/cfg80211.h>
328 /* cfg80211 fix: https://patchwork.kernel.org/patch/10449857/ */
329 static inline int batadv_cfg80211_get_station(struct net_device
*dev
,
331 struct station_info
*sinfo
)
333 memset(sinfo
, 0, sizeof(*sinfo
));
334 return cfg80211_get_station(dev
, mac_addr
, sinfo
);
337 #define cfg80211_get_station(dev, mac_addr, sinfo) \
338 batadv_cfg80211_get_station(dev, mac_addr, sinfo)
340 #endif /* < KERNEL_VERSION(4, 18, 0) */
344 typedef unsigned __bitwise __poll_t
;
346 typedef unsigned __poll_t
;
349 #endif /* < KERNEL_VERSION(4, 16, 0) */
353 #include <linux/version.h>
354 #include_next <linux/average.h>
356 #include <linux/bug.h>
360 #endif /* DECLARE_EWMA */
363 * Exponentially weighted moving average (EWMA)
365 * This implements a fixed-precision EWMA algorithm, with both the
366 * precision and fall-off coefficient determined at compile-time
367 * and built into the generated helper funtions.
369 * The first argument to the macro is the name that will be used
370 * for the struct and helper functions.
372 * The second argument, the precision, expresses how many bits are
373 * used for the fractional part of the fixed-precision values.
375 * The third argument, the weight reciprocal, determines how the
376 * new values will be weighed vs. the old state, new values will
377 * get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
378 * that this parameter must be a power of two for efficiency.
381 #define DECLARE_EWMA(name, _precision, _weight_rcp) \
382 struct ewma_##name { \
383 unsigned long internal; \
385 static inline void ewma_##name##_init(struct ewma_##name *e) \
387 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
388 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
390 * Even if you want to feed it just 0/1 you should have \
391 * some bits for the non-fractional part... \
393 BUILD_BUG_ON((_precision) > 30); \
394 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
397 static inline unsigned long \
398 ewma_##name##_read(struct ewma_##name *e) \
400 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
401 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
402 BUILD_BUG_ON((_precision) > 30); \
403 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
404 return e->internal >> (_precision); \
406 static inline void ewma_##name##_add(struct ewma_##name *e, \
409 unsigned long internal = READ_ONCE(e->internal); \
410 unsigned long weight_rcp = ilog2(_weight_rcp); \
411 unsigned long precision = _precision; \
413 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
414 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
415 BUILD_BUG_ON((_precision) > 30); \
416 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
418 WRITE_ONCE(e->internal, internal ? \
419 (((internal << weight_rcp) - internal) + \
420 (val << precision)) >> weight_rcp : \
421 (val << precision)); \
424 /* </DECLARE_EWMA> */