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(3, 16, 0)
16 /* Linux 3.15 misses the uapi include.... */
17 #include <uapi/linux/nl80211.h>
19 #endif /* < KERNEL_VERSION(3, 16, 0) */
21 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
23 #include <linux/netdevice.h>
25 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
26 BUILD_BUG_ON(upper_priv != NULL); \
27 BUILD_BUG_ON(upper_info != NULL); \
28 netdev_set_master(dev, upper_dev); \
31 #elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
33 #include <linux/netdevice.h>
35 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
36 BUILD_BUG_ON(upper_priv != NULL); \
37 BUILD_BUG_ON(upper_info != NULL); \
38 netdev_master_upper_dev_link(dev, upper_dev); \
41 #endif /* < KERNEL_VERSION(4, 5, 0) */
44 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
46 /* for batadv_v_elp_get_throughput which would have used
47 * STATION_INFO_EXPECTED_THROUGHPUT in Linux 4.0.0
49 #define NL80211_STA_INFO_EXPECTED_THROUGHPUT 28
51 /* wild hack for batadv_getlink_net only */
52 #define get_link_net get_xstats_size || 1 ? fallback_net : (struct net*)netdev->rtnl_link_ops->get_xstats_size
54 #endif /* < KERNEL_VERSION(4, 0, 0) */
57 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
59 struct sk_buff
*skb_checksum_trimmed(struct sk_buff
*skb
,
60 unsigned int transport_len
,
61 __sum16(*skb_chkf
)(struct sk_buff
*skb
));
63 int ip_mc_check_igmp(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
65 int ipv6_mc_check_mld(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
67 #endif /* < KERNEL_VERSION(4, 2, 0) */
69 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
71 #define IFF_NO_QUEUE 0; dev->tx_queue_len = 0
73 static inline bool hlist_fake(struct hlist_node
*h
)
75 return h
->pprev
== &h
->next
;
78 #endif /* < KERNEL_VERSION(4, 3, 0) */
80 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
82 #include <linux/ethtool.h>
84 #define ethtool_link_ksettings batadv_ethtool_link_ksettings
86 struct batadv_ethtool_link_ksettings
{
93 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
94 batadv_ethtool_get_link_ksettings(__dev, __link_settings)
97 batadv_ethtool_get_link_ksettings(struct net_device
*dev
,
98 struct ethtool_link_ksettings
*link_ksettings
)
100 struct ethtool_cmd cmd
;
103 memset(&cmd
, 0, sizeof(cmd
));
104 ret
= __ethtool_get_settings(dev
, &cmd
);
109 link_ksettings
->base
.duplex
= cmd
.duplex
;
110 link_ksettings
->base
.speed
= ethtool_cmd_speed(&cmd
);
115 #endif /* < KERNEL_VERSION(4, 6, 0) */
117 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
119 #ifdef netif_trans_update
120 #undef netif_trans_update
123 #define netif_trans_update batadv_netif_trans_update
124 static inline void batadv_netif_trans_update(struct net_device
*dev
)
126 dev
->trans_start
= jiffies
;
129 #endif /* < KERNEL_VERSION(4, 7, 0) */
132 #include_next <linux/netlink.h>
134 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
136 #include_next <net/netlink.h>
138 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff
*skb
);
140 static inline int batadv_nla_align_64bit(struct sk_buff
*skb
, int padattr
)
142 if (batadv_nla_need_padding_for_64bit(skb
) &&
143 !nla_reserve(skb
, padattr
, 0))
149 static inline struct nlattr
*batadv__nla_reserve_64bit(struct sk_buff
*skb
,
151 int attrlen
, int padattr
)
153 if (batadv_nla_need_padding_for_64bit(skb
))
154 batadv_nla_align_64bit(skb
, padattr
);
156 return __nla_reserve(skb
, attrtype
, attrlen
);
159 static inline void batadv__nla_put_64bit(struct sk_buff
*skb
, int attrtype
,
160 int attrlen
, const void *data
,
165 nla
= batadv__nla_reserve_64bit(skb
, attrtype
, attrlen
, padattr
);
166 memcpy(nla_data(nla
), data
, attrlen
);
169 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff
*skb
)
171 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
172 /* The nlattr header is 4 bytes in size, that's why we test
173 * if the skb->data _is_ aligned. A NOP attribute, plus
174 * nlattr header for next attribute, will make nla_data()
177 if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb
), 8))
183 static inline int batadv_nla_total_size_64bit(int payload
)
185 return NLA_ALIGN(nla_attr_size(payload
))
186 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
187 + NLA_ALIGN(nla_attr_size(0))
192 static inline int batadv_nla_put_64bit(struct sk_buff
*skb
, int attrtype
,
193 int attrlen
, const void *data
,
198 if (batadv_nla_need_padding_for_64bit(skb
))
199 len
= batadv_nla_total_size_64bit(attrlen
);
201 len
= nla_total_size(attrlen
);
202 if (unlikely(skb_tailroom(skb
) < len
))
205 batadv__nla_put_64bit(skb
, attrtype
, attrlen
, data
, padattr
);
209 #ifdef nla_put_u64_64bit
210 #undef nla_put_u64_64bit
213 #define nla_put_u64_64bit(_skb, _attrtype, _value, _padattr) \
214 batadv_nla_put_u64_64bit(_skb, _attrtype, _value, _padattr)
215 static inline int batadv_nla_put_u64_64bit(struct sk_buff
*skb
, int attrtype
,
216 u64 value
, int padattr
)
218 return batadv_nla_put_64bit(skb
, attrtype
, sizeof(u64
), &value
,
222 #endif /* < KERNEL_VERSION(4, 7, 0) */
225 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
227 #include_next <linux/cache.h>
229 /* hack for netlink.c which marked the family ops as ro */
230 #ifdef __ro_after_init
231 #undef __ro_after_init
233 #define __ro_after_init
235 #endif /* < KERNEL_VERSION(4, 10, 0) */
237 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
239 #include <linux/netdevice.h>
241 /* work around missing attribute needs_free_netdev and priv_destructor in
244 #define ether_setup(dev) \
245 void batadv_softif_free2(struct net_device *dev) \
247 batadv_softif_free(dev); \
250 void (*t1)(struct net_device *dev) __attribute__((unused)); \
251 bool t2 __attribute__((unused)); \
253 #define needs_free_netdev destructor = batadv_softif_free2; t2
254 #define priv_destructor destructor = batadv_softif_free2; t1
256 #endif /* < KERNEL_VERSION(4, 11, 9) */
258 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
260 static inline void *batadv_skb_put(struct sk_buff
*skb
, unsigned int len
)
262 return (void *)skb_put(skb
, len
);
268 #define skb_put batadv_skb_put
270 static inline void *batadv_skb_put_zero(struct sk_buff
*skb
, unsigned int len
)
272 void *tmp
= skb_put(skb
, len
);
282 #define skb_put_zero batadv_skb_put_zero
284 static inline void *batadv_skb_put_data(struct sk_buff
*skb
, const void *data
,
287 void *tmp
= skb_put(skb
, len
);
289 memcpy(tmp
, data
, len
);
297 #define skb_put_data batadv_skb_put_data
299 #endif /* < KERNEL_VERSION(4, 13, 0) */
303 #include <linux/version.h>
304 #include_next <linux/average.h>
306 #include <linux/bug.h>
310 #endif /* DECLARE_EWMA */
313 * Exponentially weighted moving average (EWMA)
315 * This implements a fixed-precision EWMA algorithm, with both the
316 * precision and fall-off coefficient determined at compile-time
317 * and built into the generated helper funtions.
319 * The first argument to the macro is the name that will be used
320 * for the struct and helper functions.
322 * The second argument, the precision, expresses how many bits are
323 * used for the fractional part of the fixed-precision values.
325 * The third argument, the weight reciprocal, determines how the
326 * new values will be weighed vs. the old state, new values will
327 * get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
328 * that this parameter must be a power of two for efficiency.
331 #define DECLARE_EWMA(name, _precision, _weight_rcp) \
332 struct ewma_##name { \
333 unsigned long internal; \
335 static inline void ewma_##name##_init(struct ewma_##name *e) \
337 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
338 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
340 * Even if you want to feed it just 0/1 you should have \
341 * some bits for the non-fractional part... \
343 BUILD_BUG_ON((_precision) > 30); \
344 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
347 static inline unsigned long \
348 ewma_##name##_read(struct ewma_##name *e) \
350 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
351 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
352 BUILD_BUG_ON((_precision) > 30); \
353 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
354 return e->internal >> (_precision); \
356 static inline void ewma_##name##_add(struct ewma_##name *e, \
359 unsigned long internal = ACCESS_ONCE(e->internal); \
360 unsigned long weight_rcp = ilog2(_weight_rcp); \
361 unsigned long precision = _precision; \
363 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
364 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
365 BUILD_BUG_ON((_precision) > 30); \
366 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
368 ACCESS_ONCE(e->internal) = internal ? \
369 (((internal << weight_rcp) - internal) + \
370 (val << precision)) >> weight_rcp : \
371 (val << precision); \
374 /* </DECLARE_EWMA> */