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openwrt-routing/batman-adv/files/compat-hacks.h

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/* Please avoid adding hacks here - instead add it to mac80211/backports.git */
#undef CONFIG_MODULE_STRIPPED
#include <linux/version.h> /* LINUX_VERSION_CODE */
#include <linux/types.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
#define dev_get_iflink(_net_dev) ((_net_dev)->iflink)
#endif /* < KERNEL_VERSION(4, 1, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0)
/* Linux 3.15 misses the uapi include.... */
#include <uapi/linux/nl80211.h>
#endif /* < KERNEL_VERSION(3, 16, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
#include <linux/netdevice.h>
#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
BUILD_BUG_ON(upper_priv != NULL); \
BUILD_BUG_ON(upper_info != NULL); \
BUILD_BUG_ON(extack != NULL); \
netdev_set_master(dev, upper_dev); \
})
#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
#include <linux/netdevice.h>
#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
BUILD_BUG_ON(upper_priv != NULL); \
BUILD_BUG_ON(upper_info != NULL); \
BUILD_BUG_ON(extack != NULL); \
netdev_master_upper_dev_link(dev, upper_dev); \
})
#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
#include <linux/netdevice.h>
#define netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info, extack) ({\
BUILD_BUG_ON(extack != NULL); \
netdev_master_upper_dev_link(dev, upper_dev, upper_priv, upper_info); \
})
#endif /* < KERNEL_VERSION(4, 5, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 0, 0)
/* for batadv_v_elp_get_throughput which would have used
* STATION_INFO_EXPECTED_THROUGHPUT in Linux 4.0.0
*/
#define NL80211_STA_INFO_EXPECTED_THROUGHPUT 28
/* wild hack for batadv_getlink_net only */
#define get_link_net get_xstats_size || 1 ? fallback_net : (struct net*)netdev->rtnl_link_ops->get_xstats_size
#endif /* < KERNEL_VERSION(4, 0, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
struct sk_buff *skb_checksum_trimmed(struct sk_buff *skb,
unsigned int transport_len,
__sum16(*skb_chkf)(struct sk_buff *skb));
int ip_mc_check_igmp(struct sk_buff *skb, struct sk_buff **skb_trimmed);
int ipv6_mc_check_mld(struct sk_buff *skb, struct sk_buff **skb_trimmed);
#endif /* < KERNEL_VERSION(4, 2, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
#define IFF_NO_QUEUE 0; dev->tx_queue_len = 0
static inline bool hlist_fake(struct hlist_node *h)
{
return h->pprev == &h->next;
}
#endif /* < KERNEL_VERSION(4, 3, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
#include <linux/ethtool.h>
#define ethtool_link_ksettings batadv_ethtool_link_ksettings
struct batadv_ethtool_link_ksettings {
struct {
__u32 speed;
__u8 duplex;
} base;
};
#define __ethtool_get_link_ksettings(__dev, __link_settings) \
batadv_ethtool_get_link_ksettings(__dev, __link_settings)
static inline int
batadv_ethtool_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *link_ksettings)
{
struct ethtool_cmd cmd;
int ret;
memset(&cmd, 0, sizeof(cmd));
ret = __ethtool_get_settings(dev, &cmd);
if (ret != 0)
return ret;
link_ksettings->base.duplex = cmd.duplex;
link_ksettings->base.speed = ethtool_cmd_speed(&cmd);
return 0;
}
#endif /* < KERNEL_VERSION(4, 6, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
#ifdef netif_trans_update
#undef netif_trans_update
#endif
#define netif_trans_update batadv_netif_trans_update
static inline void batadv_netif_trans_update(struct net_device *dev)
{
dev->trans_start = jiffies;
}
#endif /* < KERNEL_VERSION(4, 7, 0) */
#include_next <linux/netlink.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
#include_next <net/netlink.h>
static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb);
static inline int batadv_nla_align_64bit(struct sk_buff *skb, int padattr)
{
if (batadv_nla_need_padding_for_64bit(skb) &&
!nla_reserve(skb, padattr, 0))
return -EMSGSIZE;
return 0;
}
static inline struct nlattr *batadv__nla_reserve_64bit(struct sk_buff *skb,
int attrtype,
int attrlen, int padattr)
{
if (batadv_nla_need_padding_for_64bit(skb))
batadv_nla_align_64bit(skb, padattr);
return __nla_reserve(skb, attrtype, attrlen);
}
static inline void batadv__nla_put_64bit(struct sk_buff *skb, int attrtype,
int attrlen, const void *data,
int padattr)
{
struct nlattr *nla;
nla = batadv__nla_reserve_64bit(skb, attrtype, attrlen, padattr);
memcpy(nla_data(nla), data, attrlen);
}
static inline bool batadv_nla_need_padding_for_64bit(struct sk_buff *skb)
{
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
/* The nlattr header is 4 bytes in size, that's why we test
* if the skb->data _is_ aligned. A NOP attribute, plus
* nlattr header for next attribute, will make nla_data()
* 8-byte aligned.
*/
if (IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
return true;
#endif
return false;
}
static inline int batadv_nla_total_size_64bit(int payload)
{
return NLA_ALIGN(nla_attr_size(payload))
#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ NLA_ALIGN(nla_attr_size(0))
#endif
;
}
static inline int batadv_nla_put_64bit(struct sk_buff *skb, int attrtype,
int attrlen, const void *data,
int padattr)
{
size_t len;
if (batadv_nla_need_padding_for_64bit(skb))
len = batadv_nla_total_size_64bit(attrlen);
else
len = nla_total_size(attrlen);
if (unlikely(skb_tailroom(skb) < len))
return -EMSGSIZE;
batadv__nla_put_64bit(skb, attrtype, attrlen, data, padattr);
return 0;
}
#ifdef nla_put_u64_64bit
#undef nla_put_u64_64bit
#endif
#define nla_put_u64_64bit(_skb, _attrtype, _value, _padattr) \
batadv_nla_put_u64_64bit(_skb, _attrtype, _value, _padattr)
static inline int batadv_nla_put_u64_64bit(struct sk_buff *skb, int attrtype,
u64 value, int padattr)
{
return batadv_nla_put_64bit(skb, attrtype, sizeof(u64), &value,
padattr);
}
#endif /* < KERNEL_VERSION(4, 7, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
#include_next <linux/cache.h>
/* hack for netlink.c which marked the family ops as ro */
#ifdef __ro_after_init
#undef __ro_after_init
#endif
#define __ro_after_init
#endif /* < KERNEL_VERSION(4, 10, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
#include <linux/netdevice.h>
/* work around missing attribute needs_free_netdev and priv_destructor in
* net_device
*/
#define ether_setup(dev) \
void batadv_softif_free2(struct net_device *dev) \
{ \
batadv_softif_free(dev); \
free_netdev(dev); \
} \
void (*t1)(struct net_device *dev) __attribute__((unused)); \
bool t2 __attribute__((unused)); \
ether_setup(dev)
#define needs_free_netdev destructor = batadv_softif_free2; t2
#define priv_destructor destructor = batadv_softif_free2; t1
#endif /* < KERNEL_VERSION(4, 11, 9) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
static inline void *batadv_skb_put(struct sk_buff *skb, unsigned int len)
{
return (void *)skb_put(skb, len);
}
#ifdef skb_put
#undef skb_put
#endif
#define skb_put batadv_skb_put
static inline void *batadv_skb_put_zero(struct sk_buff *skb, unsigned int len)
{
void *tmp = skb_put(skb, len);
memset(tmp, 0, len);
return tmp;
}
#ifdef skb_put_zero
#undef skb_put_zero
#endif
#define skb_put_zero batadv_skb_put_zero
static inline void *batadv_skb_put_data(struct sk_buff *skb, const void *data,
unsigned int len)
{
void *tmp = skb_put(skb, len);
memcpy(tmp, data, len);
return tmp;
}
#ifdef skb_put_data
#undef skb_put_data
#endif
#define skb_put_data batadv_skb_put_data
#endif /* < KERNEL_VERSION(4, 13, 0) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
#define batadv_softif_slave_add(__dev, __slave_dev, __extack) \
batadv_softif_slave_add(__dev, __slave_dev)
#endif /* < KERNEL_VERSION(4, 15, 0) */
#ifndef from_timer
#define TIMER_DATA_TYPE unsigned long
#define TIMER_FUNC_TYPE void (*)(TIMER_DATA_TYPE)
static inline void timer_setup(struct timer_list *timer,
void (*callback)(struct timer_list *),
unsigned int flags)
{
__setup_timer(timer, (TIMER_FUNC_TYPE)callback,
(TIMER_DATA_TYPE)timer, flags);
}
#define from_timer(var, callback_timer, timer_fieldname) \
container_of(callback_timer, typeof(*var), timer_fieldname)
#endif /* !from_timer */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
#include <net/cfg80211.h>
/* cfg80211 fix: https://patchwork.kernel.org/patch/10449857/ */
static inline int batadv_cfg80211_get_station(struct net_device *dev,
const u8 *mac_addr,
struct station_info *sinfo)
{
memset(sinfo, 0, sizeof(*sinfo));
return cfg80211_get_station(dev, mac_addr, sinfo);
}
#define cfg80211_get_station(dev, mac_addr, sinfo) \
batadv_cfg80211_get_station(dev, mac_addr, sinfo)
#endif /* < KERNEL_VERSION(4, 18, 0) */
#ifdef __CHECK_POLL
typedef unsigned __bitwise __poll_t;
#else
typedef unsigned __poll_t;
#endif
#endif /* < KERNEL_VERSION(4, 16, 0) */
/* <DECLARE_EWMA> */
#include <linux/version.h>
#include_next <linux/average.h>
#include <linux/bug.h>
#ifdef DECLARE_EWMA
#undef DECLARE_EWMA
#endif /* DECLARE_EWMA */
/*
* Exponentially weighted moving average (EWMA)
*
* This implements a fixed-precision EWMA algorithm, with both the
* precision and fall-off coefficient determined at compile-time
* and built into the generated helper funtions.
*
* The first argument to the macro is the name that will be used
* for the struct and helper functions.
*
* The second argument, the precision, expresses how many bits are
* used for the fractional part of the fixed-precision values.
*
* The third argument, the weight reciprocal, determines how the
* new values will be weighed vs. the old state, new values will
* get weight 1/weight_rcp and old values 1-1/weight_rcp. Note
* that this parameter must be a power of two for efficiency.
*/
#define DECLARE_EWMA(name, _precision, _weight_rcp) \
struct ewma_##name { \
unsigned long internal; \
}; \
static inline void ewma_##name##_init(struct ewma_##name *e) \
{ \
BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
/* \
* Even if you want to feed it just 0/1 you should have \
* some bits for the non-fractional part... \
*/ \
BUILD_BUG_ON((_precision) > 30); \
BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
e->internal = 0; \
} \
static inline unsigned long \
ewma_##name##_read(struct ewma_##name *e) \
{ \
BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
BUILD_BUG_ON((_precision) > 30); \
BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
return e->internal >> (_precision); \
} \
static inline void ewma_##name##_add(struct ewma_##name *e, \
unsigned long val) \
{ \
unsigned long internal = READ_ONCE(e->internal); \
unsigned long weight_rcp = ilog2(_weight_rcp); \
unsigned long precision = _precision; \
\
BUILD_BUG_ON(!__builtin_constant_p(_precision)); \
BUILD_BUG_ON(!__builtin_constant_p(_weight_rcp)); \
BUILD_BUG_ON((_precision) > 30); \
BUILD_BUG_ON_NOT_POWER_OF_2(_weight_rcp); \
\
WRITE_ONCE(e->internal, internal ? \
(((internal << weight_rcp) - internal) + \
(val << precision)) >> weight_rcp : \
(val << precision)); \
}
/* </DECLARE_EWMA> */
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