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netfilter: ipset: Add element count to all set types header 

It is better to list the set elements for all set types, thus the
header information is uniform. Element counts are therefore added
to the bitmap and list types.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
This commit is contained in:
Jozsef Kadlecsik 2016-10-10 22:07:41 +02:00
parent a54dad51a8
commit 702b71e7c6
5 changed files with 27 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/netfilter/ipset/ip_set.h
View File

@ -250,6 +250,8 @@ struct ip_set {
u8 flags;
/* Default timeout value, if enabled */
u32 timeout;
/* Number of elements (vs timeout) */
u32 elements;
/* Element data size */
size_t dsize;
/* Offsets to extensions in elements */

2
include/linux/netfilter/ipset/ip_set_bitmap.h
View File

@ -6,8 +6,8 @@
#define IPSET_BITMAP_MAX_RANGE 0x0000FFFF
enum {
IPSET_ADD_STORE_PLAIN_TIMEOUT = -1,
IPSET_ADD_FAILED = 1,
IPSET_ADD_STORE_PLAIN_TIMEOUT,
IPSET_ADD_START_STORED_TIMEOUT,
};

10
net/netfilter/ipset/ip_set_bitmap_gen.h
View File

@ -83,6 +83,7 @@ mtype_flush(struct ip_set *set)
if (set->extensions & IPSET_EXT_DESTROY)
mtype_ext_cleanup(set);
memset(map->members, 0, map->memsize);
set->elements = 0;
}
/* Calculate the actual memory size of the set data */
@ -105,7 +106,8 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
goto nla_put_failure;
if (mtype_do_head(skb, map) ||
nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) ||
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)))
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(set->elements)))
goto nla_put_failure;
if (unlikely(ip_set_put_flags(skb, set)))
goto nla_put_failure;
@ -149,6 +151,7 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
if (ret == IPSET_ADD_FAILED) {
if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(x, set))) {
set->elements--;
ret = 0;
} else if (!(flags & IPSET_FLAG_EXIST)) {
set_bit(e->id, map->members);
@ -157,6 +160,8 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
/* Element is re-added, cleanup extensions */
ip_set_ext_destroy(set, x);
}
if (ret > 0)
set->elements--;
if (SET_WITH_TIMEOUT(set))
#ifdef IP_SET_BITMAP_STORED_TIMEOUT
@ -174,6 +179,7 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
/* Activate element */
set_bit(e->id, map->members);
set->elements++;
return 0;
}
@ -190,6 +196,7 @@ mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
return -IPSET_ERR_EXIST;
ip_set_ext_destroy(set, x);
set->elements--;
if (SET_WITH_TIMEOUT(set) &&
ip_set_timeout_expired(ext_timeout(x, set)))
return -IPSET_ERR_EXIST;
@ -285,6 +292,7 @@ mtype_gc(unsigned long ul_set)
if (ip_set_timeout_expired(ext_timeout(x, set))) {
clear_bit(id, map->members);
ip_set_ext_destroy(set, x);
set->elements--;
}
}
spin_unlock_bh(&set->lock);

21
net/netfilter/ipset/ip_set_hash_gen.h
View File

@ -275,7 +275,6 @@ htable_bits(u32 hashsize)
struct htype {
struct htable __rcu *table; /* the hash table */
u32 maxelem; /* max elements in the hash */
u32 elements; /* current element (vs timeout) */
u32 initval; /* random jhash init value */
#ifdef IP_SET_HASH_WITH_MARKMASK
u32 markmask; /* markmask value for mark mask to store */
@ -400,7 +399,7 @@ mtype_flush(struct ip_set *set)
#ifdef IP_SET_HASH_WITH_NETS
memset(h->nets, 0, sizeof(struct net_prefixes) * NLEN(set->family));
#endif
h->elements = 0;
set->elements = 0;
}
/* Destroy the hashtable part of the set */
@ -506,7 +505,7 @@ mtype_expire(struct ip_set *set, struct htype *h, u8 nets_length, size_t dsize)
nets_length, k);
#endif
ip_set_ext_destroy(set, data);
h->elements--;
set->elements--;
d++;
}
}
@ -715,11 +714,11 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
bool deleted = false, forceadd = false, reuse = false;
u32 key, multi = 0;
if (h->elements >= h->maxelem) {
if (set->elements >= h->maxelem) {
if (SET_WITH_TIMEOUT(set))
/* FIXME: when set is full, we slow down here */
mtype_expire(set, h, NLEN(set->family), set->dsize);
if (h->elements >= h->maxelem && SET_WITH_FORCEADD(set))
if (set->elements >= h->maxelem && SET_WITH_FORCEADD(set))
forceadd = true;
}
@ -732,7 +731,7 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
pr_warn("Set %s is full, maxelem %u reached\n",
set->name, h->maxelem);
return -IPSET_ERR_HASH_FULL;
} else if (h->elements >= h->maxelem) {
} else if (set->elements >= h->maxelem) {
goto set_full;
}
old = NULL;
@ -781,11 +780,11 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
NLEN(set->family), i);
#endif
ip_set_ext_destroy(set, data);
h->elements--;
set->elements--;
}
goto copy_data;
}
if (h->elements >= h->maxelem)
if (set->elements >= h->maxelem)
goto set_full;
/* Create a new slot */
if (n->pos >= n->size) {
@ -810,7 +809,7 @@ copy_elem:
j = n->pos++;
data = ahash_data(n, j, set->dsize);
copy_data:
h->elements++;
set->elements++;
#ifdef IP_SET_HASH_WITH_NETS
for (i = 0; i < IPSET_NET_COUNT; i++)
mtype_add_cidr(h, NCIDR_PUT(DCIDR_GET(d->cidr, i)),
@ -883,7 +882,7 @@ mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
smp_mb__after_atomic();
if (i + 1 == n->pos)
n->pos--;
h->elements--;
set->elements--;
#ifdef IP_SET_HASH_WITH_NETS
for (j = 0; j < IPSET_NET_COUNT; j++)
mtype_del_cidr(h, NCIDR_PUT(DCIDR_GET(d->cidr, j)),
@ -1084,7 +1083,7 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
#endif
if (nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) ||
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(h->elements)))
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(set->elements)))
goto nla_put_failure;
if (unlikely(ip_set_put_flags(skb, set)))
goto nla_put_failure;

6
net/netfilter/ipset/ip_set_list_set.c
View File

@ -166,6 +166,7 @@ __list_set_del_rcu(struct rcu_head * rcu)
static inline void
list_set_del(struct ip_set *set, struct set_elem *e)
{
set->elements--;
list_del_rcu(&e->list);
call_rcu(&e->rcu, __list_set_del_rcu);
}
@ -309,6 +310,7 @@ list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext,
list_add_rcu(&e->list, &prev->list);
else
list_add_tail_rcu(&e->list, &map->members);
set->elements++;
return 0;
}
@ -419,6 +421,7 @@ list_set_flush(struct ip_set *set)
list_for_each_entry_safe(e, n, &map->members, list)
list_set_del(set, e);
set->elements = 0;
}
static void
@ -471,7 +474,8 @@ list_set_head(struct ip_set *set, struct sk_buff *skb)
goto nla_put_failure;
if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) ||
nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) ||
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)))
nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(set->elements)))
goto nla_put_failure;
if (unlikely(ip_set_put_flags(skb, set)))
goto nla_put_failure;