batman-adv/src/compat-hacks.h

   1 /* Please avoid adding hacks here - instead add it to mac80211/backports.git */
   2
   3 #undef CONFIG_MODULE_STRIPPED
   4
   5 #include <linux/version.h>      /* LINUX_VERSION_CODE */
   6 #include <linux/types.h>
   7
   8 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
   9
  10 #define dev_get_iflink(_net_dev) ((_net_dev)->iflink)
  11
  12 #endif /* < KERNEL_VERSION(4, 1, 0) */
  13
  14 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
  15
  16 #include <linux/netdevice.h>
  17
  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); \
  23 })
  24
  25 #elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
  26
  27 #include <linux/netdevice.h>
  28
  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); \
  32 })
  33
  34 #endif /* < KERNEL_VERSION(4, 5, 0) */
  35
  36
  37 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
  38
  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
  41
  42 #endif /* < KERNEL_VERSION(4, 0, 0) */
  43
  44
  45 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
  46
  47 struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb,
  48                                      unsigned int transport_len,
  49                                      __sum16(*skb_chkf)(struct sk_buff *skb));
  50
  51 int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed);
  52
  53 int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
  54
  55 #endif /* < KERNEL_VERSION(4, 2, 0) */
  56
  57 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
  58
  59 #define IFF_NO_QUEUE    0; dev->tx_queue_len = 0
  60
  61 static inline bool hlist_fake(struct hlist_node *h)
  62 {
  63         return h->pprev == &h->next;
  64 }
  65
  66 #endif /* < KERNEL_VERSION(4, 3, 0) */
  67
  68 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
  69
  70 #include <linux/ethtool.h>
  71
  72 #define ethtool_link_ksettings batadv_ethtool_link_ksettings
  73
  74 struct batadv_ethtool_link_ksettings {
  75         struct {
  76                 __u32   speed;
  77                 __u8    duplex;
  78                 __u8    autoneg;
  79         } base;
  80 };
  81
  82 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
  83         batadv_ethtool_get_link_ksettings(__dev, __link_settings)
  84
  85 static inline int
  86 batadv_ethtool_get_link_ksettings(struct net_device *dev,
  87                                   struct ethtool_link_ksettings *link_ksettings)
  88 {
  89         struct ethtool_cmd cmd;
  90         int ret;
  91
  92         memset(&cmd, 0, sizeof(cmd));
  93         ret = __ethtool_get_settings(dev, &cmd);
  94
  95         if (ret != 0)
  96                 return ret;
  97
  98         link_ksettings->base.duplex = cmd.duplex;
  99         link_ksettings->base.speed = ethtool_cmd_speed(&cmd);
 100         link_ksettings->base.autoneg = cmd.autoneg;
 101
 102         return 0;
 103 }
 104
 105 #endif /* < KERNEL_VERSION(4, 6, 0) */
 106
 107
 108 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
 109
 110 #include_next <linux/cache.h>
 111
 112 /* hack for netlink.c which marked the family ops as ro */
 113 #ifdef __ro_after_init
 114 #undef __ro_after_init
 115 #endif
 116 #define __ro_after_init
 117
 118 #endif /* < KERNEL_VERSION(4, 10, 0) */
 119
 120 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
 121
 122 #include <linux/netdevice.h>
 123
 124 /* work around missing attribute needs_free_netdev and priv_destructor in
 125  * net_device
 126  */
 127 #define ether_setup(dev) \
 128         void batadv_softif_free2(struct net_device *dev) \
 129         { \
 130                 batadv_softif_free(dev); \
 131                 free_netdev(dev); \
 132         } \
 133         void (*t1)(struct net_device *dev) __attribute__((unused)); \
 134         bool t2 __attribute__((unused)); \
 135         ether_setup(dev)
 136 #define needs_free_netdev destructor = batadv_softif_free2; t2
 137 #define priv_destructor destructor = batadv_softif_free2; t1
 138
 139 #endif /* < KERNEL_VERSION(4, 11, 9) */
 140
 141
 142 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
 143
 144 #define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
 145         batadv_softif_slave_add(__dev, __slave_dev)
 146
 147 #endif /* < KERNEL_VERSION(4, 15, 0) */
 148
 149 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
 150
 151
 152 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
 153
 154 #include <net/cfg80211.h>
 155
 156 /* cfg80211 fix: https://patchwork.kernel.org/patch/10449857/ */
 157 static inline int batadv_cfg80211_get_station(struct net_device *dev,
 158                                               const u8 *mac_addr,
 159                                               struct station_info *sinfo)
 160 {
 161         memset(sinfo, 0, sizeof(*sinfo));
 162         return cfg80211_get_station(dev, mac_addr, sinfo);
 163 }
 164
 165 #define cfg80211_get_station(dev, mac_addr, sinfo) \
 166         batadv_cfg80211_get_station(dev, mac_addr, sinfo)
 167
 168 #endif /* < KERNEL_VERSION(4, 18, 0) */
 169
 170 #endif /* < KERNEL_VERSION(4, 16, 0) */
 171
 172 #if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
 173
 174 static inline int batadv_access_ok(int type, const void __user *p,
 175                                    unsigned long size)
 176 {
 177         return access_ok(type, p, size);
 178 }
 179
 180 #ifdef access_ok
 181 #undef access_ok
 182 #endif
 183
 184 #define access_ok_get(_1, _2, _3 , access_ok_name, ...) access_ok_name
 185 #define access_ok(...) \
 186         access_ok_get(__VA_ARGS__, access_ok3, access_ok2)(__VA_ARGS__)
 187
 188 #define access_ok2(addr, size)  batadv_access_ok(VERIFY_WRITE, (addr), (size))
 189 #define access_ok3(type, addr, size)    batadv_access_ok((type), (addr), (size))
 190
 191 #endif /* < KERNEL_VERSION(5, 0, 0) */
 192
 193 /* <DECLARE_EWMA> */
 194
 195 #include <linux/version.h>
 196 #include_next <linux/average.h>
 197
 198 #include <linux/bug.h>
 199
 200 #ifdef DECLARE_EWMA
 201 #undef DECLARE_EWMA
 202 #endif /* DECLARE_EWMA */
 203
 204 /*
 205  * Exponentially weighted moving average (EWMA)
 206  *
 207  * This implements a fixed-precision EWMA algorithm, with both the
 208  * precision and fall-off coefficient determined at compile-time
 209  * and built into the generated helper funtions.
 210  *
 211  * The first argument to the macro is the name that will be used
 212  * for the struct and helper functions.
 213  *
 214  * The second argument, the precision, expresses how many bits are
 215  * used for the fractional part of the fixed-precision values.
 216  *
 217  * The third argument, the weight reciprocal, determines how the
 218  * new values will be weighed vs. the old state, new values will
 219  * get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
 220  * that this parameter must be a power of two for efficiency.
 221  */
 222
 223 #define DECLARE_EWMA(name, _precision, _weight_rcp)                     \
 224         struct ewma_##name {                                            \
 225                 unsigned long internal;                                 \
 226         };                                                              \
 227         static inline void ewma_##name##_init(struct ewma_##name *e)    \
 228         {                                                               \
 229                 BUILD_BUG_ON(!__builtin_constant_p(_precision));        \
 230                 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp));       \
 231                 /*                                                      \
 232                  * Even if you want to feed it just 0/1 you should have \
 233                  * some bits for the non-fractional part...             \
 234                  */                                                     \
 235                 BUILD_BUG_ON((_precision) > 30);                        \
 236                 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp);               \
 237                 e->internal = 0;                                        \
 238         }                                                               \
 239         static inline unsigned long                                     \
 240         ewma_##name##_read(struct ewma_##name *e)                       \
 241         {                                                               \
 242                 BUILD_BUG_ON(!__builtin_constant_p(_precision));        \
 243                 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp));       \
 244                 BUILD_BUG_ON((_precision) > 30);                        \
 245                 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp);               \
 246                 return e->internal >> (_precision);                     \
 247         }                                                               \
 248         static inline void ewma_##name##_add(struct ewma_##name *e,     \
 249                                              unsigned long val)         \
 250         {                                                               \
 251                 unsigned long internal = READ_ONCE(e->internal);        \
 252                 unsigned long weight_rcp = ilog2(_weight_rcp);          \
 253                 unsigned long precision = _precision;                   \
 254                                                                         \
 255                 BUILD_BUG_ON(!__builtin_constant_p(_precision));        \
 256                 BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp));       \
 257                 BUILD_BUG_ON((_precision) > 30);                        \
 258                 BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp);               \
 259                                                                         \
 260                 WRITE_ONCE(e->internal, internal ?                      \
 261                         (((internal << weight_rcp) - internal) +        \
 262                                 (val << precision)) >> weight_rcp :     \
 263                         (val << precision));                            \
 264         }
 265
 266 /* </DECLARE_EWMA> */