batman-adv/files/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(3, 9, 0)
  15
  16 #include <linux/netdevice.h>
  17
  18 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
  19         BUILD_BUG_ON(upper_priv != NULL); \
  20         BUILD_BUG_ON(upper_info != NULL); \
  21         netdev_set_master(dev, upper_dev); \
  22 })
  23
  24 #elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
  25
  26 #include <linux/netdevice.h>
  27
  28 #define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info) ({\
  29         BUILD_BUG_ON(upper_priv != NULL); \
  30         BUILD_BUG_ON(upper_info != NULL); \
  31         netdev_master_upper_dev_link(dev, upper_dev); \
  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         } base;
  79 };
  80
  81 #define __ethtool_get_link_ksettings(__dev, __link_settings) \
  82         batadv_ethtool_get_link_ksettings(__dev, __link_settings)
  83
  84 static inline int
  85 batadv_ethtool_get_link_ksettings(struct net_device *dev,
  86                                   struct ethtool_link_ksettings *link_ksettings)
  87 {
  88         struct ethtool_cmd cmd;
  89         int ret;
  90
  91         memset(&cmd, 0, sizeof(cmd));
  92         ret = __ethtool_get_settings(dev, &cmd);
  93
  94         if (ret != 0)
  95                 return ret;
  96
  97         link_ksettings->base.duplex = cmd.duplex;
  98         link_ksettings->base.speed = ethtool_cmd_speed(&cmd);
  99
 100         return 0;
 101 }
 102
 103 #endif /* < KERNEL_VERSION(4, 6, 0) */
 104
 105 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
 106
 107 #define netif_trans_update batadv_netif_trans_update
 108 static inline void batadv_netif_trans_update(struct net_device *dev)
 109 {
 110         dev->trans_start = jiffies;
 111 }
 112
 113 #endif /* < KERNEL_VERSION(4, 7, 0) */
 114
 115
 116 #include_next <linux/netlink.h>
 117
 118 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
 119
 120 #include_next <net/netlink.h>
 121
 122 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb);
 123
 124 static inline int batadv_nla_align_64bit(struct sk_buff *skb, int padattr)
 125 {
 126         if (batadv_nla_need_padding_for_64bit(skb) &&
 127             !nla_reserve(skb, padattr, 0))
 128                 return -EMSGSIZE;
 129
 130         return 0;
 131 }
 132
 133 static inline struct nlattr *batadv__nla_reserve_64bit(struct sk_buff *skb,
 134                                                        int attrtype,
 135                                                        int attrlen, int padattr)
 136 {
 137         if (batadv_nla_need_padding_for_64bit(skb))
 138                 batadv_nla_align_64bit(skb, padattr);
 139
 140         return __nla_reserve(skb, attrtype, attrlen);
 141 }
 142
 143 static inline void batadv__nla_put_64bit(struct sk_buff *skb, int attrtype,
 144                                          int attrlen, const void *data,
 145                                          int padattr)
 146 {
 147         struct nlattr *nla;
 148
 149         nla = batadv__nla_reserve_64bit(skb, attrtype, attrlen, padattr);
 150         memcpy(nla_data(nla), data, attrlen);
 151 }
 152
 153 static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb)
 154 {
 155 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 156         /* The nlattr header is 4 bytes in size, that's why we test
 157          * if the skb->data _is_ aligned.  A NOP attribute, plus
 158          * nlattr header for next attribute, will make nla_data()
 159          * 8-byte aligned.
 160          */
 161         if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
 162                 return true;
 163 #endif
 164         return false;
 165 }
 166
 167 static inline int batadv_nla_total_size_64bit(int payload)
 168 {
 169         return NLA_ALIGN(nla_attr_size(payload))
 170 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 171                 + NLA_ALIGN(nla_attr_size(0))
 172 #endif
 173                 ;
 174 }
 175
 176 static inline int batadv_nla_put_64bit(struct sk_buff *skb, int attrtype,
 177                                        int attrlen, const void *data,
 178                                        int padattr)
 179 {
 180         size_t len;
 181
 182         if (batadv_nla_need_padding_for_64bit(skb))
 183                 len = batadv_nla_total_size_64bit(attrlen);
 184         else
 185                 len = nla_total_size(attrlen);
 186         if (unlikely(skb_tailroom(skb) < len))
 187                 return -EMSGSIZE;
 188
 189         batadv__nla_put_64bit(skb, attrtype, attrlen, data, padattr);
 190         return 0;
 191 }
 192
 193 #define nla_put_u64_64bit(_skb, _attrtype, _value, _padattr) \
 194         batadv_nla_put_u64_64bit(_skb, _attrtype, _value, _padattr)
 195 static inline int batadv_nla_put_u64_64bit(struct sk_buff *skb, int attrtype,
 196                                            u64 value, int padattr)
 197 {
 198         return batadv_nla_put_64bit(skb, attrtype, sizeof(u64), &value,
 199                                     padattr);
 200 }
 201
 202 #endif /* < KERNEL_VERSION(4, 7, 0) */
 203
 204
 205 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
 206
 207 #include_next <linux/cache.h>
 208
 209 /* hack for netlink.c which marked the family ops as ro */
 210 #ifdef __ro_after_init
 211 #undef __ro_after_init
 212 #endif
 213 #define __ro_after_init
 214
 215 #endif /* < KERNEL_VERSION(4, 10, 0) */