diff options
Diffstat (limited to 'net/ipv4/netfilter/ipt_CLUSTERIP.c')
-rw-r--r-- | net/ipv4/netfilter/ipt_CLUSTERIP.c | 119 |
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, |