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path: root/net/ipv4/netfilter/ipt_CLUSTERIP.c
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Diffstat (limited to 'net/ipv4/netfilter/ipt_CLUSTERIP.c')
-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c119
1 files changed, 55 insertions, 64 deletions
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 40e273421398..69bd362b5fa2 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -19,7 +19,6 @@
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/if_arp.h>
-#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/netfilter_arp.h>
#include <linux/netfilter/x_tables.h>
@@ -30,14 +29,6 @@
#define CLUSTERIP_VERSION "0.8"
-#define DEBUG_CLUSTERIP
-
-#ifdef DEBUG_CLUSTERIP
-#define DEBUGP printk
-#else
-#define DEBUGP
-#endif
-
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("iptables target for CLUSTERIP");
@@ -122,9 +113,8 @@ __clusterip_config_find(__be32 clusterip)
list_for_each(pos, &clusterip_configs) {
struct clusterip_config *c = list_entry(pos,
struct clusterip_config, list);
- if (c->clusterip == clusterip) {
+ if (c->clusterip == clusterip)
return c;
- }
}
return NULL;
@@ -155,9 +145,8 @@ clusterip_config_init_nodelist(struct clusterip_config *c,
{
int n;
- for (n = 0; n < i->num_local_nodes; n++) {
+ for (n = 0; n < i->num_local_nodes; n++)
set_bit(i->local_nodes[n] - 1, &c->local_nodes);
- }
}
static struct clusterip_config *
@@ -220,27 +209,28 @@ clusterip_add_node(struct clusterip_config *c, u_int16_t nodenum)
return 0;
}
-static int
+static bool
clusterip_del_node(struct clusterip_config *c, u_int16_t nodenum)
{
if (nodenum == 0 ||
nodenum > c->num_total_nodes)
- return 1;
+ return true;
if (test_and_clear_bit(nodenum - 1, &c->local_nodes))
- return 0;
+ return false;
- return 1;
+ return true;
}
#endif
static inline u_int32_t
-clusterip_hashfn(struct sk_buff *skb, struct clusterip_config *config)
+clusterip_hashfn(const struct sk_buff *skb,
+ const struct clusterip_config *config)
{
- struct iphdr *iph = ip_hdr(skb);
+ const struct iphdr *iph = ip_hdr(skb);
unsigned long hashval;
u_int16_t sport, dport;
- u_int16_t *ports;
+ const u_int16_t *ports;
switch (iph->protocol) {
case IPPROTO_TCP:
@@ -249,15 +239,14 @@ clusterip_hashfn(struct sk_buff *skb, struct clusterip_config *config)
case IPPROTO_SCTP:
case IPPROTO_DCCP:
case IPPROTO_ICMP:
- ports = (void *)iph+iph->ihl*4;
+ ports = (const void *)iph+iph->ihl*4;
sport = ports[0];
dport = ports[1];
break;
default:
- if (net_ratelimit()) {
+ if (net_ratelimit())
printk(KERN_NOTICE "CLUSTERIP: unknown protocol `%u'\n",
iph->protocol);
- }
sport = dport = 0;
}
@@ -285,11 +274,11 @@ clusterip_hashfn(struct sk_buff *skb, struct clusterip_config *config)
}
/* node numbers are 1..n, not 0..n */
- return ((hashval % config->num_total_nodes)+1);
+ return (hashval % config->num_total_nodes) + 1;
}
static inline int
-clusterip_responsible(struct clusterip_config *config, u_int32_t hash)
+clusterip_responsible(const struct clusterip_config *config, u_int32_t hash)
{
return test_bit(hash - 1, &config->local_nodes);
}
@@ -353,15 +342,15 @@ target(struct sk_buff **pskb,
break;
}
-#ifdef DEBUG_CLUSTERP
+#ifdef DEBUG
DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
#endif
- DEBUGP("hash=%u ct_hash=%u ", hash, ct->mark);
+ pr_debug("hash=%u ct_hash=%u ", hash, ct->mark);
if (!clusterip_responsible(cipinfo->config, hash)) {
- DEBUGP("not responsible\n");
+ pr_debug("not responsible\n");
return NF_DROP;
}
- DEBUGP("responsible\n");
+ pr_debug("responsible\n");
/* despite being received via linklayer multicast, this is
* actually a unicast IP packet. TCP doesn't like PACKET_MULTICAST */
@@ -370,7 +359,7 @@ target(struct sk_buff **pskb,
return XT_CONTINUE;
}
-static int
+static bool
checkentry(const char *tablename,
const void *e_void,
const struct xt_target *target,
@@ -387,50 +376,34 @@ checkentry(const char *tablename,
cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP_SPT_DPT) {
printk(KERN_WARNING "CLUSTERIP: unknown mode `%u'\n",
cipinfo->hash_mode);
- return 0;
+ return false;
}
if (e->ip.dmsk.s_addr != htonl(0xffffffff)
|| e->ip.dst.s_addr == 0) {
printk(KERN_ERR "CLUSTERIP: Please specify destination IP\n");
- return 0;
+ return false;
}
/* FIXME: further sanity checks */
config = clusterip_config_find_get(e->ip.dst.s_addr, 1);
- if (config) {
- if (cipinfo->config != NULL) {
- /* Case A: This is an entry that gets reloaded, since
- * it still has a cipinfo->config pointer. Simply
- * increase the entry refcount and return */
- if (cipinfo->config != config) {
- printk(KERN_ERR "CLUSTERIP: Reloaded entry "
- "has invalid config pointer!\n");
- return 0;
- }
- } else {
- /* Case B: This is a new rule referring to an existing
- * clusterip config. */
- cipinfo->config = config;
- }
- } else {
- /* Case C: This is a completely new clusterip config */
+ if (!config) {
if (!(cipinfo->flags & CLUSTERIP_FLAG_NEW)) {
printk(KERN_WARNING "CLUSTERIP: no config found for %u.%u.%u.%u, need 'new'\n", NIPQUAD(e->ip.dst.s_addr));
- return 0;
+ return false;
} else {
struct net_device *dev;
if (e->ip.iniface[0] == '\0') {
printk(KERN_WARNING "CLUSTERIP: Please specify an interface name\n");
- return 0;
+ return false;
}
dev = dev_get_by_name(e->ip.iniface);
if (!dev) {
printk(KERN_WARNING "CLUSTERIP: no such interface %s\n", e->ip.iniface);
- return 0;
+ return false;
}
config = clusterip_config_init(cipinfo,
@@ -438,20 +411,20 @@ checkentry(const char *tablename,
if (!config) {
printk(KERN_WARNING "CLUSTERIP: cannot allocate config\n");
dev_put(dev);
- return 0;
+ return false;
}
dev_mc_add(config->dev,config->clustermac, ETH_ALEN, 0);
}
- cipinfo->config = config;
}
+ cipinfo->config = config;
if (nf_ct_l3proto_try_module_get(target->family) < 0) {
printk(KERN_WARNING "can't load conntrack support for "
"proto=%d\n", target->family);
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/* drop reference count of cluster config when rule is deleted */
@@ -468,13 +441,30 @@ static void destroy(const struct xt_target *target, void *targinfo)
nf_ct_l3proto_module_put(target->family);
}
-static struct xt_target clusterip_tgt = {
+#ifdef CONFIG_COMPAT
+struct compat_ipt_clusterip_tgt_info
+{
+ u_int32_t flags;
+ u_int8_t clustermac[6];
+ u_int16_t num_total_nodes;
+ u_int16_t num_local_nodes;
+ u_int16_t local_nodes[CLUSTERIP_MAX_NODES];
+ u_int32_t hash_mode;
+ u_int32_t hash_initval;
+ compat_uptr_t config;
+};
+#endif /* CONFIG_COMPAT */
+
+static struct xt_target clusterip_tgt __read_mostly = {
.name = "CLUSTERIP",
.family = AF_INET,
.target = target,
- .targetsize = sizeof(struct ipt_clusterip_tgt_info),
.checkentry = checkentry,
.destroy = destroy,
+ .targetsize = sizeof(struct ipt_clusterip_tgt_info),
+#ifdef CONFIG_COMPAT
+ .compatsize = sizeof(struct compat_ipt_clusterip_tgt_info),
+#endif /* CONFIG_COMPAT */
.me = THIS_MODULE
};
@@ -491,7 +481,7 @@ struct arp_payload {
__be32 dst_ip;
} __attribute__ ((packed));
-#ifdef CLUSTERIP_DEBUG
+#ifdef DEBUG
static void arp_print(struct arp_payload *payload)
{
#define HBUFFERLEN 30
@@ -547,8 +537,9 @@ arp_mangle(unsigned int hook,
* this wouldn't work, since we didn't subscribe the mcast group on
* other interfaces */
if (c->dev != out) {
- DEBUGP("CLUSTERIP: not mangling arp reply on different "
- "interface: cip'%s'-skb'%s'\n", c->dev->name, out->name);
+ pr_debug("CLUSTERIP: not mangling arp reply on different "
+ "interface: cip'%s'-skb'%s'\n",
+ c->dev->name, out->name);
clusterip_config_put(c);
return NF_ACCEPT;
}
@@ -556,8 +547,8 @@ arp_mangle(unsigned int hook,
/* mangle reply hardware address */
memcpy(payload->src_hw, c->clustermac, arp->ar_hln);
-#ifdef CLUSTERIP_DEBUG
- DEBUGP(KERN_DEBUG "CLUSTERIP mangled arp reply: ");
+#ifdef DEBUG
+ pr_debug(KERN_DEBUG "CLUSTERIP mangled arp reply: ");
arp_print(payload);
#endif
@@ -647,7 +638,7 @@ static int clusterip_seq_show(struct seq_file *s, void *v)
return 0;
}
-static struct seq_operations clusterip_seq_ops = {
+static const struct seq_operations clusterip_seq_ops = {
.start = clusterip_seq_start,
.next = clusterip_seq_next,
.stop = clusterip_seq_stop,
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 02:45:23 +0000