aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2009-03-24 13:24:36 -0700
committerDavid S. Miller <davem@davemloft.net>2009-03-24 13:24:36 -0700
commitb5bb14386eabcb4229ade2bc0a2b237ca166d37d (patch)
tree1966e65479f0d12cec0a204443a95b8eb57946db
parentbb4f92b3a33bfc31f55098da85be44702bea2d16 (diff)
parent1d45209d89e647e9f27e4afa1f47338df73bc112 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
-rw-r--r--drivers/leds/Kconfig3
-rw-r--r--include/linux/netfilter/Kbuild8
-rw-r--r--include/linux/netfilter/nfnetlink.h1
-rw-r--r--include/linux/netfilter/x_tables.h15
-rw-r--r--include/linux/netfilter/xt_LED.h13
-rw-r--r--include/linux/netfilter/xt_cluster.h15
-rw-r--r--include/linux/netfilter/xt_limit.h9
-rw-r--r--include/linux/netfilter/xt_quota.h4
-rw-r--r--include/linux/netfilter/xt_statistic.h7
-rw-r--r--include/linux/netfilter_ipv6/Kbuild1
-rw-r--r--include/net/netfilter/nf_conntrack.h2
-rw-r--r--include/net/netfilter/nf_conntrack_l4proto.h10
-rw-r--r--include/net/netfilter/nf_log.h11
-rw-r--r--net/bridge/netfilter/ebtable_broute.c1
-rw-r--r--net/bridge/netfilter/ebtable_filter.c1
-rw-r--r--net/bridge/netfilter/ebtable_nat.c1
-rw-r--r--net/ipv4/netfilter/Kconfig30
-rw-r--r--net/ipv4/netfilter/Makefile2
-rw-r--r--net/ipv4/netfilter/arp_tables.c159
-rw-r--r--net/ipv4/netfilter/arptable_filter.c2
-rw-r--r--net/ipv4/netfilter/ip_queue.c2
-rw-r--r--net/ipv4/netfilter/ip_tables.c153
-rw-r--r--net/ipv4/netfilter/ipt_LOG.c2
-rw-r--r--net/ipv4/netfilter/ipt_TTL.c97
-rw-r--r--net/ipv4/netfilter/ipt_ULOG.c2
-rw-r--r--net/ipv4/netfilter/ipt_ttl.c63
-rw-r--r--net/ipv4/netfilter/iptable_filter.c1
-rw-r--r--net/ipv4/netfilter/iptable_mangle.c1
-rw-r--r--net/ipv4/netfilter/iptable_raw.c1
-rw-r--r--net/ipv4/netfilter/iptable_security.c1
-rw-r--r--net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c4
-rw-r--r--net/ipv4/netfilter/nf_nat_rule.c1
-rw-r--r--net/ipv6/netfilter/Kconfig38
-rw-r--r--net/ipv6/netfilter/Makefile2
-rw-r--r--net/ipv6/netfilter/ip6_queue.c1
-rw-r--r--net/ipv6/netfilter/ip6_tables.c152
-rw-r--r--net/ipv6/netfilter/ip6t_HL.c95
-rw-r--r--net/ipv6/netfilter/ip6t_LOG.c2
-rw-r--r--net/ipv6/netfilter/ip6t_hl.c68
-rw-r--r--net/ipv6/netfilter/ip6table_filter.c1
-rw-r--r--net/ipv6/netfilter/ip6table_mangle.c1
-rw-r--r--net/ipv6/netfilter/ip6table_raw.c1
-rw-r--r--net/ipv6/netfilter/ip6table_security.c1
-rw-r--r--net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c1
-rw-r--r--net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c4
-rw-r--r--net/netfilter/Kconfig63
-rw-r--r--net/netfilter/Makefile4
-rw-r--r--net/netfilter/core.c2
-rw-r--r--net/netfilter/nf_conntrack_core.c14
-rw-r--r--net/netfilter/nf_conntrack_expect.c3
-rw-r--r--net/netfilter/nf_conntrack_netlink.c161
-rw-r--r--net/netfilter/nf_conntrack_proto.c21
-rw-r--r--net/netfilter/nf_conntrack_proto_dccp.c145
-rw-r--r--net/netfilter/nf_conntrack_proto_generic.c2
-rw-r--r--net/netfilter/nf_conntrack_proto_tcp.c2
-rw-r--r--net/netfilter/nf_conntrack_proto_udp.c2
-rw-r--r--net/netfilter/nf_log.c201
-rw-r--r--net/netfilter/nfnetlink.c6
-rw-r--r--net/netfilter/nfnetlink_log.c18
-rw-r--r--net/netfilter/x_tables.c26
-rw-r--r--net/netfilter/xt_HL.c171
-rw-r--r--net/netfilter/xt_LED.c161
-rw-r--r--net/netfilter/xt_cluster.c164
-rw-r--r--net/netfilter/xt_hashlimit.c7
-rw-r--r--net/netfilter/xt_hl.c108
-rw-r--r--net/netfilter/xt_limit.c40
-rw-r--r--net/netfilter/xt_physdev.c37
-rw-r--r--net/netfilter/xt_quota.c31
-rw-r--r--net/netfilter/xt_statistic.c28
-rw-r--r--net/netlink/af_netlink.c1
-rw-r--r--net/sysctl_net.c2
71 files changed, 1626 insertions, 784 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 742713611bc..556aeca0d86 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -223,4 +223,7 @@ config LEDS_TRIGGER_DEFAULT_ON
This allows LEDs to be initialised in the ON state.
If unsure, say Y.
+comment "iptables trigger is under Netfilter config (LED target)"
+ depends on LEDS_TRIGGERS
+
endif # NEW_LEDS
diff --git a/include/linux/netfilter/Kbuild b/include/linux/netfilter/Kbuild
index 5a8af875bce..af9d2fb9721 100644
--- a/include/linux/netfilter/Kbuild
+++ b/include/linux/netfilter/Kbuild
@@ -7,16 +7,21 @@ header-y += xt_CLASSIFY.h
header-y += xt_CONNMARK.h
header-y += xt_CONNSECMARK.h
header-y += xt_DSCP.h
+header-y += xt_LED.h
header-y += xt_MARK.h
header-y += xt_NFLOG.h
header-y += xt_NFQUEUE.h
header-y += xt_RATEEST.h
header-y += xt_SECMARK.h
header-y += xt_TCPMSS.h
+header-y += xt_TCPOPTSTRIP.h
+header-y += xt_TPROXY.h
header-y += xt_comment.h
header-y += xt_connbytes.h
+header-y += xt_connlimit.h
header-y += xt_connmark.h
header-y += xt_conntrack.h
+header-y += xt_cluster.h
header-y += xt_dccp.h
header-y += xt_dscp.h
header-y += xt_esp.h
@@ -30,6 +35,7 @@ header-y += xt_mark.h
header-y += xt_multiport.h
header-y += xt_owner.h
header-y += xt_pkttype.h
+header-y += xt_quota.h
header-y += xt_rateest.h
header-y += xt_realm.h
header-y += xt_recent.h
@@ -39,6 +45,8 @@ header-y += xt_statistic.h
header-y += xt_string.h
header-y += xt_tcpmss.h
header-y += xt_tcpudp.h
+header-y += xt_time.h
+header-y += xt_u32.h
unifdef-y += nf_conntrack_common.h
unifdef-y += nf_conntrack_ftp.h
diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index 7d8e0455cca..135e5cfe68a 100644
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -76,6 +76,7 @@ extern int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
extern int nfnetlink_has_listeners(unsigned int group);
extern int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group,
int echo);
+extern void nfnetlink_set_err(u32 pid, u32 group, int error);
extern int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags);
extern void nfnl_lock(void);
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index c7ee8744d26..e8e08d03675 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -349,23 +349,22 @@ struct xt_table
{
struct list_head list;
- /* A unique name... */
- const char name[XT_TABLE_MAXNAMELEN];
-
/* What hooks you will enter on */
unsigned int valid_hooks;
/* Lock for the curtain */
- rwlock_t lock;
+ struct mutex lock;
/* Man behind the curtain... */
- //struct ip6t_table_info *private;
- void *private;
+ struct xt_table_info *private;
/* Set this to THIS_MODULE if you are a module, otherwise NULL */
struct module *me;
u_int8_t af; /* address/protocol family */
+
+ /* A unique name... */
+ const char name[XT_TABLE_MAXNAMELEN];
};
#include <linux/netfilter_ipv4.h>
@@ -386,7 +385,7 @@ struct xt_table_info
/* ipt_entry tables: one per CPU */
/* Note : this field MUST be the last one, see XT_TABLE_INFO_SZ */
- char *entries[1];
+ void *entries[1];
};
#define XT_TABLE_INFO_SZ (offsetof(struct xt_table_info, entries) \
@@ -433,6 +432,8 @@ extern void xt_proto_fini(struct net *net, u_int8_t af);
extern struct xt_table_info *xt_alloc_table_info(unsigned int size);
extern void xt_free_table_info(struct xt_table_info *info);
+extern void xt_table_entry_swap_rcu(struct xt_table_info *old,
+ struct xt_table_info *new);
#ifdef CONFIG_COMPAT
#include <net/compat.h>
diff --git a/include/linux/netfilter/xt_LED.h b/include/linux/netfilter/xt_LED.h
new file mode 100644
index 00000000000..4c91a0d770d
--- /dev/null
+++ b/include/linux/netfilter/xt_LED.h
@@ -0,0 +1,13 @@
+#ifndef _XT_LED_H
+#define _XT_LED_H
+
+struct xt_led_info {
+ char id[27]; /* Unique ID for this trigger in the LED class */
+ __u8 always_blink; /* Blink even if the LED is already on */
+ __u32 delay; /* Delay until LED is switched off after trigger */
+
+ /* Kernel data used in the module */
+ void *internal_data __attribute__((aligned(8)));
+};
+
+#endif /* _XT_LED_H */
diff --git a/include/linux/netfilter/xt_cluster.h b/include/linux/netfilter/xt_cluster.h
new file mode 100644
index 00000000000..5e0a0d07b52
--- /dev/null
+++ b/include/linux/netfilter/xt_cluster.h
@@ -0,0 +1,15 @@
+#ifndef _XT_CLUSTER_MATCH_H
+#define _XT_CLUSTER_MATCH_H
+
+enum xt_cluster_flags {
+ XT_CLUSTER_F_INV = (1 << 0)
+};
+
+struct xt_cluster_match_info {
+ u_int32_t total_nodes;
+ u_int32_t node_mask;
+ u_int32_t hash_seed;
+ u_int32_t flags;
+};
+
+#endif /* _XT_CLUSTER_MATCH_H */
diff --git a/include/linux/netfilter/xt_limit.h b/include/linux/netfilter/xt_limit.h
index b3ce65375ec..fda222c7953 100644
--- a/include/linux/netfilter/xt_limit.h
+++ b/include/linux/netfilter/xt_limit.h
@@ -4,6 +4,8 @@
/* timings are in milliseconds. */
#define XT_LIMIT_SCALE 10000
+struct xt_limit_priv;
+
/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
seconds, or one every 59 hours. */
struct xt_rateinfo {
@@ -11,11 +13,10 @@ struct xt_rateinfo {
u_int32_t burst; /* Period multiplier for upper limit. */
/* Used internally by the kernel */
- unsigned long prev;
- u_int32_t credit;
+ unsigned long prev; /* moved to xt_limit_priv */
+ u_int32_t credit; /* moved to xt_limit_priv */
u_int32_t credit_cap, cost;
- /* Ugly, ugly fucker. */
- struct xt_rateinfo *master;
+ struct xt_limit_priv *master;
};
#endif /*_XT_RATE_H*/
diff --git a/include/linux/netfilter/xt_quota.h b/include/linux/netfilter/xt_quota.h
index 4c8368d781e..8dc89dfc136 100644
--- a/include/linux/netfilter/xt_quota.h
+++ b/include/linux/netfilter/xt_quota.h
@@ -6,13 +6,15 @@ enum xt_quota_flags {
};
#define XT_QUOTA_MASK 0x1
+struct xt_quota_priv;
+
struct xt_quota_info {
u_int32_t flags;
u_int32_t pad;
/* Used internally by the kernel */
aligned_u64 quota;
- struct xt_quota_info *master;
+ struct xt_quota_priv *master;
};
#endif /* _XT_QUOTA_H */
diff --git a/include/linux/netfilter/xt_statistic.h b/include/linux/netfilter/xt_statistic.h
index 3d38bc97504..8f521ab49ef 100644
--- a/include/linux/netfilter/xt_statistic.h
+++ b/include/linux/netfilter/xt_statistic.h
@@ -13,6 +13,8 @@ enum xt_statistic_flags {
};
#define XT_STATISTIC_MASK 0x1
+struct xt_statistic_priv;
+
struct xt_statistic_info {
u_int16_t mode;
u_int16_t flags;
@@ -23,11 +25,10 @@ struct xt_statistic_info {
struct {
u_int32_t every;
u_int32_t packet;
- /* Used internally by the kernel */
- u_int32_t count;
+ u_int32_t count; /* unused */
} nth;
} u;
- struct xt_statistic_info *master __attribute__((aligned(8)));
+ struct xt_statistic_priv *master __attribute__((aligned(8)));
};
#endif /* _XT_STATISTIC_H */
diff --git a/include/linux/netfilter_ipv6/Kbuild b/include/linux/netfilter_ipv6/Kbuild
index 8887a5fcd1d..aca4bd1f6d7 100644
--- a/include/linux/netfilter_ipv6/Kbuild
+++ b/include/linux/netfilter_ipv6/Kbuild
@@ -11,6 +11,7 @@ header-y += ip6t_length.h
header-y += ip6t_limit.h
header-y += ip6t_mac.h
header-y += ip6t_mark.h
+header-y += ip6t_mh.h
header-y += ip6t_multiport.h
header-y += ip6t_opts.h
header-y += ip6t_owner.h
diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index 2e0c53641cb..4dfb793c3f1 100644
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -287,7 +287,7 @@ static inline int nf_ct_is_untracked(const struct sk_buff *skb)
extern int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp);
extern unsigned int nf_conntrack_htable_size;
-extern int nf_conntrack_max;
+extern unsigned int nf_conntrack_max;
#define NF_CT_STAT_INC(net, count) \
(per_cpu_ptr((net)->ct.stat, raw_smp_processor_id())->count++)
diff --git a/include/net/netfilter/nf_conntrack_l4proto.h b/include/net/netfilter/nf_conntrack_l4proto.h
index debdaf75cec..b01070bf2f8 100644
--- a/include/net/netfilter/nf_conntrack_l4proto.h
+++ b/include/net/netfilter/nf_conntrack_l4proto.h
@@ -90,10 +90,7 @@ struct nf_conntrack_l4proto
struct module *me;
};
-/* Existing built-in protocols */
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6;
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4;
-extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6;
+/* Existing built-in generic protocol */
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_generic;
#define MAX_NF_CT_PROTO 256
@@ -101,11 +98,6 @@ extern struct nf_conntrack_l4proto nf_conntrack_l4proto_generic;
extern struct nf_conntrack_l4proto *
__nf_ct_l4proto_find(u_int16_t l3proto, u_int8_t l4proto);
-extern struct nf_conntrack_l4proto *
-nf_ct_l4proto_find_get(u_int16_t l3proto, u_int8_t protocol);
-
-extern void nf_ct_l4proto_put(struct nf_conntrack_l4proto *p);
-
/* Protocol registration. */
extern int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *proto);
extern void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *proto);
diff --git a/include/net/netfilter/nf_log.h b/include/net/netfilter/nf_log.h
index 7182c06974f..920997f1aff 100644
--- a/include/net/netfilter/nf_log.h
+++ b/include/net/netfilter/nf_log.h
@@ -1,6 +1,8 @@
#ifndef _NF_LOG_H
#define _NF_LOG_H
+#include <linux/netfilter.h>
+
/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
* disappear once iptables is replaced with pkttables. Please DO NOT use them
* for any new code! */
@@ -40,12 +42,15 @@ struct nf_logger {
struct module *me;
nf_logfn *logfn;
char *name;
+ struct list_head list[NFPROTO_NUMPROTO];
};
/* Function to register/unregister log function. */
-int nf_log_register(u_int8_t pf, const struct nf_logger *logger);
-void nf_log_unregister(const struct nf_logger *logger);
-void nf_log_unregister_pf(u_int8_t pf);
+int nf_log_register(u_int8_t pf, struct nf_logger *logger);
+void nf_log_unregister(struct nf_logger *logger);
+
+int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger);
+void nf_log_unbind_pf(u_int8_t pf);
/* Calls the registered backend logging function */
void nf_log_packet(u_int8_t pf,
diff --git a/net/bridge/netfilter/ebtable_broute.c b/net/bridge/netfilter/ebtable_broute.c
index 8604dfc1fc3..c751111440f 100644
--- a/net/bridge/netfilter/ebtable_broute.c
+++ b/net/bridge/netfilter/ebtable_broute.c
@@ -46,7 +46,6 @@ static struct ebt_table broute_table =
.name = "broute",
.table = &initial_table,
.valid_hooks = 1 << NF_BR_BROUTING,
- .lock = __RW_LOCK_UNLOCKED(broute_table.lock),
.check = check,
.me = THIS_MODULE,
};
diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c
index 2b2e8040a9c..a5eea72938a 100644
--- a/net/bridge/netfilter/ebtable_filter.c
+++ b/net/bridge/netfilter/ebtable_filter.c
@@ -55,7 +55,6 @@ static struct ebt_table frame_filter =
.name = "filter",
.table = &initial_table,
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(frame_filter.lock),
.check = check,
.me = THIS_MODULE,
};
diff --git a/net/bridge/netfilter/ebtable_nat.c b/net/bridge/netfilter/ebtable_nat.c
index 3fe1ae87e35..6024c551f9a 100644
--- a/net/bridge/netfilter/ebtable_nat.c
+++ b/net/bridge/netfilter/ebtable_nat.c
@@ -55,7 +55,6 @@ static struct ebt_table frame_nat =
.name = "nat",
.table = &initial_table,
.valid_hooks = NAT_VALID_HOOKS,
- .lock = __RW_LOCK_UNLOCKED(frame_nat.lock),
.check = check,
.me = THIS_MODULE,
};
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 3816e1dc929..1833bdbf980 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -31,7 +31,7 @@ config NF_CONNTRACK_PROC_COMPAT
default y
help
This option enables /proc and sysctl compatibility with the old
- layer 3 dependant connection tracking. This is needed to keep
+ layer 3 dependent connection tracking. This is needed to keep
old programs that have not been adapted to the new names working.
If unsure, say Y.
@@ -95,11 +95,11 @@ config IP_NF_MATCH_ECN
config IP_NF_MATCH_TTL
tristate '"ttl" match support'
depends on NETFILTER_ADVANCED
- help
- This adds CONFIG_IP_NF_MATCH_TTL option, which enabled the user
- to match packets by their TTL value.
-
- To compile it as a module, choose M here. If unsure, say N.
+ select NETFILTER_XT_MATCH_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_MATCH_HL.
# `filter', generic and specific targets
config IP_NF_FILTER
@@ -323,19 +323,13 @@ config IP_NF_TARGET_ECN
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_TARGET_TTL
- tristate 'TTL target support'
- depends on IP_NF_MANGLE
+ tristate '"TTL" target support'
depends on NETFILTER_ADVANCED
- help
- This option adds a `TTL' target, which enables the user to modify
- the TTL value of the IP header.
-
- While it is safe to decrement/lower the TTL, this target also enables
- functionality to increment and set the TTL value of the IP header to
- arbitrary values. This is EXTREMELY DANGEROUS since you can easily
- create immortal packets that loop forever on the network.
-
- To compile it as a module, choose M here. If unsure, say N.
+ select NETFILTER_XT_TARGET_HL
+ ---help---
+ This is a backwards-compat option for the user's convenience
+ (e.g. when running oldconfig). It selects
+ CONFIG_NETFILTER_XT_TARGET_HL.
# raw + specific targets
config IP_NF_RAW
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 5f9b650d90f..48111594ee9 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -51,7 +51,6 @@ obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
-obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
# targets
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
@@ -61,7 +60,6 @@ obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.o
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
-obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
# generic ARP tables
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 7ea88b61cb0..64a7c6ce0b9 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -73,6 +73,36 @@ static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
return (ret != 0);
}
+/*
+ * Unfortunatly, _b and _mask are not aligned to an int (or long int)
+ * Some arches dont care, unrolling the loop is a win on them.
+ */
+static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
+{
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
+ const unsigned long *a = (const unsigned long *)_a;
+ const unsigned long *b = (const unsigned long *)_b;
+ const unsigned long *mask = (const unsigned long *)_mask;
+ unsigned long ret;
+
+ ret = (a[0] ^ b[0]) & mask[0];
+ if (IFNAMSIZ > sizeof(unsigned long))
+ ret |= (a[1] ^ b[1]) & mask[1];
+ if (IFNAMSIZ > 2 * sizeof(unsigned long))
+ ret |= (a[2] ^ b[2]) & mask[2];