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Date: Sun, 13 Nov 2016 23:25:19 +0100
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 25/39] netfilter: ipset: Add element count to all set types header
From: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
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@...ckhole.kfki.hu>
---
include/linux/netfilter/ipset/ip_set.h | 2 ++
include/linux/netfilter/ipset/ip_set_bitmap.h | 2 +-
net/netfilter/ipset/ip_set_bitmap_gen.h | 10 +++++++++-
net/netfilter/ipset/ip_set_hash_gen.h | 21 ++++++++++-----------
net/netfilter/ipset/ip_set_list_set.c | 6 +++++-
5 files changed, 27 insertions(+), 14 deletions(-)
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h
index 7a218eb74887..4671d740610f 100644
--- a/include/linux/netfilter/ipset/ip_set.h
+++ b/include/linux/netfilter/ipset/ip_set.h
@@ -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 */
diff --git a/include/linux/netfilter/ipset/ip_set_bitmap.h b/include/linux/netfilter/ipset/ip_set_bitmap.h
index 5e4662a71e01..366d6c0ea04f 100644
--- a/include/linux/netfilter/ipset/ip_set_bitmap.h
+++ b/include/linux/netfilter/ipset/ip_set_bitmap.h
@@ -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,
};
diff --git a/net/netfilter/ipset/ip_set_bitmap_gen.h b/net/netfilter/ipset/ip_set_bitmap_gen.h
index 4f07b90f8ef4..1810d1c06e3d 100644
--- a/net/netfilter/ipset/ip_set_bitmap_gen.h
+++ b/net/netfilter/ipset/ip_set_bitmap_gen.h
@@ -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);
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
index f5acfb9709c9..6e967f198d1e 100644
--- a/net/netfilter/ipset/ip_set_hash_gen.h
+++ b/net/netfilter/ipset/ip_set_hash_gen.h
@@ -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 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
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;
diff --git a/net/netfilter/ipset/ip_set_list_set.c b/net/netfilter/ipset/ip_set_list_set.c
index 462b0b1870e2..c45516695934 100644
--- a/net/netfilter/ipset/ip_set_list_set.c
+++ b/net/netfilter/ipset/ip_set_list_set.c
@@ -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;
--
2.1.4
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