[commits] [batman-adv] master: batman-adv: Remove explicit compat.h include and split compat.h (8746f0f)

postmaster at open-mesh.org postmaster at open-mesh.org
Tue Apr 21 05:40:29 CEST 2015


Repository : ssh://git@open-mesh.org/batman-adv

On branch  : master

>---------------------------------------------------------------

commit 8746f0f7fd8e60407c575c62610ecacb0573c226
Author: Sven Eckelmann <sven at narfation.org>
Date:   Fri Apr 17 19:40:27 2015 +0200

    batman-adv: Remove explicit compat.h include and split compat.h
    
    The current approach for the compat layer is to include the compat.h file at
    exactly the right time to provide additional functionality and to live patch
    the batman-adv sources. This has the problem that the compat.h file becomes
    harder to read over time. Also live patching and adding of missing
    functionality partially conflict. This becomes obvious when the include order
    in some files is different compared to the one the author of an compat.h entry
    expected.
    
    A different approach is to inject intermediate header files which add
    additional features. This allows to reduce the size of compat.h and only leaves
    the live patching part in it. The compat.h can then added automatically to each
    compile run before anything else is included. compat.h has therefore the
    control which headers must be included before the live patching of the
    batman-adv source can begin.
    
    Signed-off-by: Sven Eckelmann <sven at narfation.org>
    Signed-off-by: Marek Lindner <mareklindner at neomailbox.ch>


>---------------------------------------------------------------

8746f0f7fd8e60407c575c62610ecacb0573c226
 Makefile |    4 +
 compat.h |  342 +++-----------------------------------------------------------
 main.h   |    2 +-
 3 files changed, 21 insertions(+), 327 deletions(-)

diff --git a/Makefile b/Makefile
index 4f6c30a..fd7ae8d 100644
--- a/Makefile
+++ b/Makefile
@@ -41,6 +41,10 @@ RM ?= rm -f
 REVISION= $(shell	if [ -d "$(PWD)/.git" ]; then \
 				echo $$(git --git-dir="$(PWD)/.git" describe --always --dirty --match "v*" |sed 's/^v//' 2> /dev/null || echo "[unknown]"); \
 			fi)
+NOSTDINC_FLAGS := \
+	-I$(PWD)/compat-include/ \
+	-include $(PWD)/compat.h \
+	$(CFLAGS)
 
 CONFIG_BATMAN_ADV=m
 batman-adv-y += compat.o
diff --git a/compat.h b/compat.h
index 98b9612..35e3dbd 100644
--- a/compat.h
+++ b/compat.h
@@ -22,30 +22,7 @@
 #define _NET_BATMAN_ADV_COMPAT_H_
 
 #include <linux/version.h>	/* LINUX_VERSION_CODE */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
-
-#define consume_skb(_skb) kfree_skb(_skb)
-
-#undef __alloc_percpu
-#define __alloc_percpu(size, align) \
-	percpu_alloc_mask((size), GFP_KERNEL, cpu_possible_map)
-
-#endif /* < KERNEL_VERSION(2, 6, 30) */
-
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 31)
-
-#define __compat__module_param_call(p1, p2, p3, p4, p5, p6, p7) \
-	__module_param_call(p1, p2, p3, p4, p5, p7)
-
-#else
-
-#define __compat__module_param_call(p1, p2, p3, p4, p5, p6, p7) \
-	__module_param_call(p1, p2, p3, p4, p5, p6, p7)
-
-#endif /* < KERNEL_VERSION(2, 6, 31) */
-
+#include <linux/kconfig.h>
 
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33))
 #include <linux/autoconf.h>
@@ -56,154 +33,47 @@
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
 
-#define __always_unused			__attribute__((unused))
-#define __percpu
-
 #define skb_iif iif
 
-#define this_cpu_add(x, c)	batadv_this_cpu_add(&(x), c)
-
-static inline void batadv_this_cpu_add(uint64_t *count_ptr, size_t count)
-{
-	int cpu = get_cpu();
-	*per_cpu_ptr(count_ptr, cpu) += count;
-	put_cpu();
-}
-
 #define batadv_softif_destroy_netlink(dev, head) batadv_softif_destroy_netlink(dev)
-#define unregister_netdevice_queue(dev, head) unregister_netdevice(dev)
-
-static inline struct sk_buff *netdev_alloc_skb_ip_align(struct net_device *dev,
-							unsigned int length)
-{
-	struct sk_buff *skb = netdev_alloc_skb(dev, length + NET_IP_ALIGN);
-
-	if (NET_IP_ALIGN && skb)
-		skb_reserve(skb, NET_IP_ALIGN);
-	return skb;
-}
-
-#define VLAN_PRIO_MASK          0xe000 /* Priority Code Point */
-#define VLAN_PRIO_SHIFT         13
 
 #endif /* < KERNEL_VERSION(2, 6, 33) */
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)
-
-#define rcu_dereference_protected(p, c) (p)
-
-#define rcu_dereference_raw(p)	({ \
-				 typeof(p) _________p1 = ACCESS_ONCE(p); \
-				 smp_read_barrier_depends(); \
-				 (_________p1); \
-				 })
-
-#endif /* < KERNEL_VERSION(2, 6, 34) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+#include <linux/netdevice.h>
 
-#define pr_warn pr_warning
+#define netdev_master_upper_dev_get_rcu(dev) \
+	(dev->br_port ? dev : NULL); \
+	break;
 
-#undef  netdev_for_each_mc_addr
-#define netdev_for_each_mc_addr(mclist, dev) \
-	for (mclist = (struct batadv_dev_addr_list *)dev->mc_list; mclist; \
-	     mclist = (struct batadv_dev_addr_list *)mclist->next)
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
 
-/* Note, that this breaks the usage of the normal 'struct netdev_hw_addr'
- * for kernels < 2.6.35 in batman-adv!
- */
-#define netdev_hw_addr batadv_dev_addr_list
-struct batadv_dev_addr_list {
-	struct dev_addr_list *next;
-	u8  addr[MAX_ADDR_LEN];
-	u8  da_addrlen;
-	u8  da_synced;
-	int da_users;
-	int da_gusers;
-};
+#include <linux/netdevice.h>
 
-#endif /* < KERNEL_VERSION(2, 6, 35) */
+#define netdev_master_upper_dev_get_rcu(dev) \
+	(dev->priv_flags & IFF_BRIDGE_PORT ? dev : NULL); \
+	break;
 
+#endif /* < KERNEL_VERSION(2, 6, 36) */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
 
-#define __rcu
 #define IFF_BRIDGE_PORT  0 || (hard_iface->net_dev->br_port ? 1 : 0)
 
-struct kernel_param_ops {
-	/* Returns 0, or -errno.  arg is in kp->arg. */
-	int (*set)(const char *val, const struct kernel_param *kp);
-	/* Returns length written or -errno.  Buffer is 4k (ie. be short!) */
-	int (*get)(char *buffer, struct kernel_param *kp);
-	/* Optional function to free kp->arg when module unloaded. */
-	void (*free)(void *arg);
-};
-
-#define module_param_cb(name, ops, arg, perm)				\
-	static int __compat_set_param_##name(const char *val,		\
-					     struct kernel_param *kp)	\
-				{ return (ops)->set(val, kp); }		\
-	static int __compat_get_param_##name(char *buffer,		\
-					     struct kernel_param *kp)	\
-				{ return (ops)->get(buffer, kp); }	\
-	__compat__module_param_call(MODULE_PARAM_PREFIX, name,		\
-				    __compat_set_param_##name,		\
-				    __compat_get_param_##name, arg,	\
-				    __same_type((arg), bool *), perm)
-
-static inline int batadv_param_set_copystring(const char *val,
-					      const struct kernel_param *kp)
-{
-	return param_set_copystring(val, (struct kernel_param *)kp);
-}
-#define param_set_copystring batadv_param_set_copystring
-
 /* hack for dev->addr_assign_type &= ~NET_ADDR_RANDOM; */
 #define addr_assign_type ifindex
-#define NET_ADDR_RANDOM 0
-
-#define netdev_master_upper_dev_get_rcu(dev) \
-	(dev->br_port ? dev : NULL); \
-	break;
 
 #endif /* < KERNEL_VERSION(2, 6, 36) */
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 37)
-
-#define hlist_first_rcu(head)	(*((struct hlist_node __rcu **)(&(head)->first)))
-#define hlist_next_rcu(node)	(*((struct hlist_node __rcu **)(&(node)->next)))
-
-#endif /* < KERNEL_VERSION(2, 6, 37) */
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39)
 
-#define kstrtou32(cp, base, v)\
-({\
-	unsigned long _v;\
-	int _r;\
-	_r = strict_strtoul(cp, base, &_v);\
-	*(v) = (uint32_t)_v;\
-	if ((unsigned long)*(v) != _v)\
-		_r = -ERANGE;\
-	_r;\
-})
-#define kstrtoul strict_strtoul
-#define kstrtol  strict_strtol
-
-/* On older kernels net_dev->master is reserved for iface bonding. */
-static inline int batadv_netdev_set_master(struct net_device *slave,
-					   struct net_device *master)
-{
-	return 0;
-}
-
-#define netdev_set_master batadv_netdev_set_master
-
 /* Hack for removing ndo_add/del_slave at the end of net_device_ops.
  * This is somewhat ugly because it requires that ndo_validate_addr
  * is at the end of this struct in soft-interface.c.
  */
+#include <linux/netdevice.h>
+
 #define ndo_validate_addr \
 	ndo_validate_addr = eth_validate_addr, \
 }; \
@@ -223,7 +93,8 @@ static const struct { \
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 0, 0)
 
 #define kfree_rcu(ptr, rcu_head) call_rcu(&ptr->rcu_head, batadv_free_rcu_##ptr)
-#define vlan_insert_tag(skb, proto, vid) __vlan_put_tag(skb, vid)
+
+struct rcu_head;
 
 void batadv_free_rcu_orig_vlan(struct rcu_head *rcu);
 void batadv_free_rcu_softif_vlan(struct rcu_head *rcu);
@@ -236,32 +107,8 @@ void batadv_free_rcu_nc_path(struct rcu_head *rcu);
 void batadv_free_rcu_tvlv_handler(struct rcu_head *rcu);
 void batadv_free_rcu_vlan(struct rcu_head *rcu);
 
-static inline void skb_reset_mac_len(struct sk_buff *skb)
-{
-	skb->mac_len = skb->network_header - skb->mac_header;
-}
-
-#undef BUILD_BUG_ON
-#ifdef __CHECKER__
-#define BUILD_BUG_ON(condition) (0)
-#else /* __CHECKER__ */
-#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
-#endif /* __CHECKER__ */
-
 #endif /* < KERNEL_VERSION(3, 0, 0) */
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0)
-
-#define __ARG_PLACEHOLDER_1 0,
-#define config_enabled(cfg) _config_enabled(cfg)
-#define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value)
-#define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0)
-#define ___config_enabled(__ignored, val, ...) val
-
-#define IS_ENABLED(option) \
-       (config_enabled(option) || config_enabled(option##_MODULE))
-
-#endif /* < KERNEL_VERSION(3, 1, 0) */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
 
@@ -288,56 +135,8 @@ static int __batadv_interface_kill_vid(struct net_device *dev, __be16 proto,\
 
 #endif /* < KERNEL_VERSION(3, 3, 0) */
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 4, 0)
-
-#define eth_hw_addr_random(dev)	batadv_eth_hw_addr_random(dev)
-
-static inline void batadv_eth_hw_addr_random(struct net_device *dev)
-{
-	random_ether_addr(dev->dev_addr);
-}
-
-#define kmalloc_array(n, size, flags) kmalloc(n * size, flags)
-
-#endif /* < KERNEL_VERSION(3, 4, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 5, 0)
-
-#ifndef net_ratelimited_function
-#define net_ratelimited_function(func, ...) \
-	do { \
-		if (net_ratelimit()) \
-			func(__VA_ARGS__); \
-	} while (0)
-#endif /* ifndef net_ratelimited_function */
-
-#endif /* < KERNEL_VERSION(3, 5, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0)
-
-#define ETH_P_BATMAN	0x4305
-
-/* hack for not correctly set mac_len. This may happen for some special
- * configurations like batman-adv on VLANs.
- *
- * This is pretty dirty, but we only use skb_share_check() in main.c right
- * before mac_len is checked, and the recomputation shouldn't hurt too much.
- */
-#define skb_share_check(skb, b) \
-	({ \
-		struct sk_buff *_t_skb; \
-		_t_skb = skb_share_check(skb, b); \
-		if (_t_skb) \
-			skb_reset_mac_len(_t_skb); \
-		_t_skb; \
-	})
-
-#endif /* < KERNEL_VERSION(3, 8, 0) */
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 0)
 
-#define prandom_u32() random32()
-
 #define batadv_interface_set_mac_addr(x, y) \
 __batadv_interface_set_mac_addr(struct net_device *dev, void *p);\
 static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) \
@@ -362,61 +161,10 @@ static int batadv_interface_tx(struct sk_buff *skb, \
 static int __batadv_interface_tx(struct sk_buff *skb, \
 				 struct net_device *soft_iface)
 
-#define netdev_master_upper_dev_link netdev_set_master
-#define netdev_upper_dev_unlink(slave, master) netdev_set_master(slave, NULL)
-#define netdev_master_upper_dev_get(dev) \
-({\
-	ASSERT_RTNL();\
-	dev->master;\
-})
-#define hlist_entry_safe(ptr, type, member) \
-	({ typeof(ptr) ____ptr = (ptr); \
-	   ____ptr ? hlist_entry(____ptr, type, member) : NULL; \
-	})
-
-#undef hlist_for_each_entry
-#define hlist_for_each_entry(pos, head, member) \
-	for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member);\
-	pos; \
-	pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
-
-#undef hlist_for_each_entry_rcu
-#define hlist_for_each_entry_rcu(pos, head, member) \
-	for (pos = hlist_entry_safe (rcu_dereference_raw(hlist_first_rcu(head)),\
-	typeof(*(pos)), member); \
-	pos; \
-	pos = hlist_entry_safe(rcu_dereference_raw(hlist_next_rcu(\
-	&(pos)->member)), typeof(*(pos)), member))
-
-#undef hlist_for_each_entry_safe
-#define hlist_for_each_entry_safe(pos, n, head, member) \
-	for (pos = hlist_entry_safe((head)->first, typeof(*pos), member);\
-	pos && ({ n = pos->member.next; 1; }); \
-	pos = hlist_entry_safe(n, typeof(*pos), member))
-
-#ifndef netdev_master_upper_dev_get_rcu
-#define netdev_master_upper_dev_get_rcu(dev) \
-	(dev->priv_flags & IFF_BRIDGE_PORT ? dev : NULL); \
-	break;
-
-#endif /* netdev_master_upper_dev_get_rcu */
-
 #endif /* < KERNEL_VERSION(3, 9, 0) */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
 
-#ifndef vlan_insert_tag
-
-/* include this header early to let the following define
- * not mess up the original function prototype.
- */
-#include <linux/if_vlan.h>
-#define vlan_insert_tag(skb, proto, vid) vlan_insert_tag(skb, vid)
-
-#endif /* vlan_insert_tag */
-
-#define NETIF_F_HW_VLAN_CTAG_FILTER NETIF_F_HW_VLAN_FILTER
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 3, 0)
 
 #define batadv_interface_add_vid(x, y, z) \
@@ -444,62 +192,4 @@ static int __batadv_interface_kill_vid(struct net_device *dev, __be16 proto,\
 
 #endif /* < KERNEL_VERSION(3, 10, 0) */
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
-
-#define netdev_notifier_info_to_dev(ptr) ptr
-
-/* older kernels still need to call skb_abort_seq_read() */
-#define skb_seq_read(consumed, data, st) \
-	({ \
-		int __len = skb_seq_read(consumed, data, st); \
-		if (__len == 0) \
-			skb_abort_seq_read(st); \
-		__len; \
-	})
-#endif /* < KERNEL_VERSION(3, 11, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0)
-
-#define ether_addr_equal_unaligned(_a, _b) (memcmp(_a, _b, ETH_ALEN) == 0)
-#define ether_addr_copy(_a, _b) memcpy(_a, _b, ETH_ALEN)
-
-#endif /* < KERNEL_VERSION(3, 14, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0)
-
-#define pskb_copy_for_clone pskb_copy
-
-#endif /* < KERNEL_VERSION(3, 16, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
-
-#define hlist_add_behind(n, prev) hlist_add_after(prev, n)
-
-/* alloc_netdev() was defined differently before 2.6.38 */
-#undef alloc_netdev
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38)
-#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
-	alloc_netdev_mq(sizeof_priv, name, setup, 1)
-#else
-#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
-	alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
-#endif /* nested < KERNEL_VERSION(2, 6, 38) */
-
-#endif /* < KERNEL_VERSION(3, 17, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0)
-
-static inline bool seq_has_overflowed(struct seq_file *m)
-{
-	return m->count == m->size;
-}
-
-#endif /* < KERNEL_VERSION(3, 19, 0) */
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
-
-#define dev_get_iflink(_net_dev) ((_net_dev)->iflink)
-
-#endif /* < KERNEL_VERSION(4, 1, 0) */
-
 #endif /* _NET_BATMAN_ADV_COMPAT_H_ */
diff --git a/main.h b/main.h
index 569846b..1d5340c 100644
--- a/main.h
+++ b/main.h
@@ -182,7 +182,7 @@ enum batadv_uev_type {
 #include <linux/jiffies.h>
 #include <linux/seq_file.h>
 #include <linux/if_vlan.h>
-#include "compat.h"
+#include <linux/printk.h>
 
 #include "types.h"
 



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