netfilter: ipset: The list:set type with counter support

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/ipset/ip_set_list_set.c b/net/netfilter/ipset/ip_set_list_set.c
index 919eefe..c09022e 100644 (file)
--- a/net/netfilter/ipset/ip_set_list_set.c
+++ b/net/netfilter/ipset/ip_set_list_set.c
@@ -16,7 +16,7 @@
 #include <linux/netfilter/ipset/ip_set_list.h>
 
 #define REVISION_MIN   0
-#define REVISION_MAX   0
+#define REVISION_MAX   1 /* Counters support added */
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
@@ -35,6 +35,21 @@ struct sett_elem {
        unsigned long timeout;
 };
 
+struct setc_elem {
+       struct {
+               ip_set_id_t id;
+       } __attribute__ ((aligned));
+       struct ip_set_counter counter;
+};
+
+struct setct_elem {
+       struct {
+               ip_set_id_t id;
+       } __attribute__ ((aligned));
+       struct ip_set_counter counter;
+       unsigned long timeout;
+};
+
 struct set_adt_elem {
        ip_set_id_t id;
        ip_set_id_t refid;
@@ -59,6 +74,8 @@ list_set_elem(const struct list_set *map, u32 id)
 
 #define ext_timeout(e, m)      \
 (unsigned long *)((void *)(e) + (m)->offset[IPSET_OFFSET_TIMEOUT])
+#define ext_counter(e, m)      \
+(struct ip_set_counter *)((void *)(e) + (m)->offset[IPSET_OFFSET_COUNTER])
 
 static int
 list_set_ktest(struct ip_set *set, const struct sk_buff *skb,
@@ -78,8 +95,13 @@ list_set_ktest(struct ip_set *set, const struct sk_buff *skb,
                    ip_set_timeout_expired(ext_timeout(e, map)))
                        continue;
                ret = ip_set_test(e->id, skb, par, opt);
-               if (ret > 0)
+               if (ret > 0) {
+                       if (SET_WITH_COUNTER(set))
+                               ip_set_update_counter(ext_counter(e, map),
+                                                     ext, &opt->ext,
+                                                     opt->cmdflags);
                        return ret;
+               }
        }
        return 0;
 }
@@ -193,6 +215,8 @@ list_set_add(struct ip_set *set, u32 i, struct set_adt_elem *d,
        e->id = d->id;
        if (SET_WITH_TIMEOUT(set))
                ip_set_timeout_set(ext_timeout(e, map), ext->timeout);
+       if (SET_WITH_COUNTER(set))
+               ip_set_init_counter(ext_counter(e, map), ext);
        return 0;
 }
 
@@ -293,6 +317,8 @@ list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext,
                /* Update extensions */
                if (SET_WITH_TIMEOUT(set))
                        ip_set_timeout_set(ext_timeout(e, map), ext->timeout);
+               if (SET_WITH_COUNTER(set))
+                       ip_set_init_counter(ext_counter(e, map), ext);
                /* Set is already added to the list */
                ip_set_put_byindex(d->id);
                return 0;
@@ -362,7 +388,9 @@ list_set_uadt(struct ip_set *set, struct nlattr *tb[],
 
        if (unlikely(!tb[IPSET_ATTR_NAME] ||
                     !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
-                    !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
+                    !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS) ||
+                    !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
+                    !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES)))
                return -IPSET_ERR_PROTOCOL;
 
        if (tb[IPSET_ATTR_LINENO])
@@ -455,6 +483,9 @@ list_set_head(struct ip_set *set, struct sk_buff *skb)
        if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) ||
            (SET_WITH_TIMEOUT(set) &&
             nla_put_net32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout))) ||
+           (SET_WITH_COUNTER(set) &&
+            nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS,
+                          htonl(IPSET_FLAG_WITH_COUNTERS))) ||
            nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)) ||
            nla_put_net32(skb, IPSET_ATTR_MEMSIZE,
                          htonl(sizeof(*map) + map->size * map->dsize)))
@@ -502,6 +533,9 @@ list_set_list(const struct ip_set *set,
                                  htonl(ip_set_timeout_get(
                                                ext_timeout(e, map)))))
                        goto nla_put_failure;
+               if (SET_WITH_COUNTER(set) &&
+                   ip_set_put_counter(skb, ext_counter(e, map)))
+                       goto nla_put_failure;
                ipset_nest_end(skb, nested);
        }
 finish:
@@ -603,11 +637,12 @@ static int
 list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
 {
        struct list_set *map;
-       u32 size = IP_SET_LIST_DEFAULT_SIZE;
+       u32 size = IP_SET_LIST_DEFAULT_SIZE, cadt_flags = 0;
        unsigned long timeout = 0;
 
        if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) ||
-                    !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+                    !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+                    !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
                return -IPSET_ERR_PROTOCOL;
 
        if (tb[IPSET_ATTR_SIZE])
@@ -615,10 +650,33 @@ list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
        if (size < IP_SET_LIST_MIN_SIZE)
                size = IP_SET_LIST_MIN_SIZE;
 
+       if (tb[IPSET_ATTR_CADT_FLAGS])
+               cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
        if (tb[IPSET_ATTR_TIMEOUT])
                timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
        set->variant = &set_variant;
-       if (tb[IPSET_ATTR_TIMEOUT]) {
+       if (cadt_flags & IPSET_FLAG_WITH_COUNTERS) {
+               set->extensions |= IPSET_EXT_COUNTER;
+               if (tb[IPSET_ATTR_TIMEOUT]) {
+                       map = init_list_set(set, size,
+                                       sizeof(struct setct_elem), timeout);
+                       if (!map)
+                               return -ENOMEM;
+                       set->extensions |= IPSET_EXT_TIMEOUT;
+                       map->offset[IPSET_OFFSET_TIMEOUT] =
+                               offsetof(struct setct_elem, timeout);
+                       map->offset[IPSET_OFFSET_COUNTER] =
+                               offsetof(struct setct_elem, counter);
+                       list_set_gc_init(set, list_set_gc);
+               } else {
+                       map = init_list_set(set, size,
+                                           sizeof(struct setc_elem), 0);
+                       if (!map)
+                               return -ENOMEM;
+                       map->offset[IPSET_OFFSET_COUNTER] =
+                               offsetof(struct setc_elem, counter);
+               }
+       } else if (tb[IPSET_ATTR_TIMEOUT]) {
                map = init_list_set(set, size,
                                    sizeof(struct sett_elem), timeout);
                if (!map)
@@ -647,6 +705,7 @@ static struct ip_set_type list_set_type __read_mostly = {
        .create_policy  = {
                [IPSET_ATTR_SIZE]       = { .type = NLA_U32 },
                [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
+               [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
        },
        .adt_policy     = {
                [IPSET_ATTR_NAME]       = { .type = NLA_STRING,
@@ -656,6 +715,8 @@ static struct ip_set_type list_set_type __read_mostly = {
                [IPSET_ATTR_TIMEOUT]    = { .type = NLA_U32 },
                [IPSET_ATTR_LINENO]     = { .type = NLA_U32 },
                [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
+               [IPSET_ATTR_BYTES]      = { .type = NLA_U64 },
+               [IPSET_ATTR_PACKETS]    = { .type = NLA_U64 },
        },
        .me             = THIS_MODULE,
 };