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 /* wild hack for batadv_getlink_net only */
40 #define get_link_net get_xstats_size || 1 ? fallback_net : (struct net*)netdev->rtnl_link_ops->get_xstats_size
42 #endif /* < KERNEL_VERSION(4, 0, 0) */
45 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
47 struct sk_buff
*skb_checksum_trimmed(struct sk_buff
*skb
,
48 unsigned int transport_len
,
49 __sum16(*skb_chkf
)(struct sk_buff
*skb
));
51 int ip_mc_check_igmp(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
53 int ipv6_mc_check_mld(struct sk_buff
*skb
, struct sk_buff
**skb_trimmed
);
55 #endif /* < KERNEL_VERSION(4, 2, 0) */
57 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
59 #define IFF_NO_QUEUE 0; dev->tx_queue_len = 0
61 static inline bool hlist_fake(struct hlist_node
*h
)
63 return h
->pprev
== &h
->next
;
66 #endif /* < KERNEL_VERSION(4, 3, 0) */
68 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
70 #include <linux/ethtool.h>
72 #define ethtool_link_ksettings batadv_ethtool_link_ksettings
74 struct batadv_ethtool_link_ksettings
{
82 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
83 batadv_ethtool_get_link_ksettings(__dev, __link_settings)
86 batadv_ethtool_get_link_ksettings(struct net_device
*dev
,
87 struct ethtool_link_ksettings
*link_ksettings
)
89 struct ethtool_cmd cmd
;
92 memset(&cmd
, 0, sizeof(cmd
));
93 ret
= __ethtool_get_settings(dev
, &cmd
);
98 link_ksettings
->base
.duplex
= cmd
.duplex
;
99 link_ksettings
->base
.speed
= ethtool_cmd_speed(&cmd
);
100 link_ksettings
->base
.autoneg
= cmd
.autoneg
;
105 #endif /* < KERNEL_VERSION(4, 6, 0) */
108 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
110 #include_next <linux/cache.h>
112 /* hack for netlink.c which marked the family ops as ro */
113 #ifdef __ro_after_init
114 #undef __ro_after_init
116 #define __ro_after_init
118 #endif /* < KERNEL_VERSION(4, 10, 0) */
120 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
122 #include <linux/netdevice.h>
124 /* work around missing attribute needs_free_netdev and priv_destructor in
127 #define ether_setup(dev) \
128 void batadv_softif_free2(struct net_device *dev) \
130 batadv_softif_free(dev); \
133 void (*t1)(struct net_device *dev) __attribute__((unused)); \
134 bool t2 __attribute__((unused)); \
136 #define needs_free_netdev destructor = batadv_softif_free2; t2
137 #define priv_destructor destructor = batadv_softif_free2; t1
139 #endif /* < KERNEL_VERSION(4, 11, 9) */
142 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
144 #define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
145 batadv_softif_slave_add(__dev, __slave_dev)
147 #endif /* < KERNEL_VERSION(4, 15, 0) */
150 #if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
152 static inline int batadv_access_ok(int type
, const void __user
*p
,
155 return access_ok(type
, p
, size
);
162 #define access_ok_get(_1, _2, _3 , access_ok_name, ...) access_ok_name
163 #define access_ok(...) \
164 access_ok_get(__VA_ARGS__, access_ok3, access_ok2)(__VA_ARGS__)
166 #define access_ok2(addr, size) batadv_access_ok(VERIFY_WRITE, (addr), (size))
167 #define access_ok3(type, addr, size) batadv_access_ok((type), (addr), (size))
169 #endif /* < KERNEL_VERSION(5, 0, 0) */
173 #include <linux/version.h>
174 #include_next <linux/average.h>
176 #include <linux/bug.h>
180 #endif /* DECLARE_EWMA */
183 * Exponentially weighted moving average (EWMA)
185 * This implements a fixed-precision EWMA algorithm, with both the
186 * precision and fall-off coefficient determined at compile-time
187 * and built into the generated helper funtions.
189 * The first argument to the macro is the name that will be used
190 * for the struct and helper functions.
192 * The second argument, the precision, expresses how many bits are
193 * used for the fractional part of the fixed-precision values.
195 * The third argument, the weight reciprocal, determines how the
196 * new values will be weighed vs. the old state, new values will
197 * get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
198 * that this parameter must be a power of two for efficiency.
201 #define DECLARE_EWMA(name, _precision, _weight_rcp) \
202 struct ewma_##name { \
203 unsigned long internal; \
205 static inline void ewma_##name##_init(struct ewma_##name *e) \
207 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
208 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
210 * Even if you want to feed it just 0/1 you should have \
211 * some bits for the non-fractional part... \
213 BUILD_BUG_ON((_precision) > 30); \
214 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
217 static inline unsigned long \
218 ewma_##name##_read(struct ewma_##name *e) \
220 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
221 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
222 BUILD_BUG_ON((_precision) > 30); \
223 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
224 return e->internal >> (_precision); \
226 static inline void ewma_##name##_add(struct ewma_##name *e, \
229 unsigned long internal = READ_ONCE(e->internal); \
230 unsigned long weight_rcp = ilog2(_weight_rcp); \
231 unsigned long precision = _precision; \
233 BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
234 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
235 BUILD_BUG_ON((_precision) > 30); \
236 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
238 WRITE_ONCE(e->internal, internal ? \
239 (((internal << weight_rcp) - internal) + \
240 (val << precision)) >> weight_rcp : \
241 (val << precision)); \
244 /* </DECLARE_EWMA> */