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Date: Fri, 4 Oct 2013 10:32:58 +0200
From: Pablo Neira Ayuso <pablo@...filter.org>
To: netfilter-devel@...r.kernel.org
Cc: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 13/33] netfilter: ipset: Prepare ipset to support multiple networks for hash types
From: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
In order to support hash:net,net, hash:net,port,net etc. types,
arrays are introduced for the book-keeping of existing cidr sizes
and network numbers in a set.
Signed-off-by: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
---
include/linux/netfilter/ipset/ip_set.h | 2 +
net/netfilter/ipset/ip_set_hash_gen.h | 78 ++++++++++++++-------------
net/netfilter/ipset/ip_set_hash_ipportnet.c | 4 +-
net/netfilter/ipset/ip_set_hash_net.c | 4 +-
net/netfilter/ipset/ip_set_hash_netiface.c | 4 +-
net/netfilter/ipset/ip_set_hash_netport.c | 4 +-
6 files changed, 50 insertions(+), 46 deletions(-)
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h
index 69aa604..56012a3 100644
--- a/include/linux/netfilter/ipset/ip_set.h
+++ b/include/linux/netfilter/ipset/ip_set.h
@@ -398,6 +398,8 @@ bitmap_bytes(u32 a, u32 b)
{ .bytes = ULLONG_MAX, .packets = ULLONG_MAX, \
.timeout = (map)->timeout }
+#define IP_SET_INIT_CIDR(a, b) ((a) ? (a) : (b))
+
#define IPSET_CONCAT(a, b) a##b
#define IPSET_TOKEN(a, b) IPSET_CONCAT(a, b)
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h
index 68b9cce..a833240 100644
--- a/net/netfilter/ipset/ip_set_hash_gen.h
+++ b/net/netfilter/ipset/ip_set_hash_gen.h
@@ -77,10 +77,14 @@ struct htable {
#define hbucket(h, i) (&((h)->bucket[i]))
+#ifndef IPSET_NET_COUNT
+#define IPSET_NET_COUNT 1
+#endif
+
/* Book-keeping of the prefixes added to the set */
struct net_prefixes {
- u8 cidr; /* the different cidr values in the set */
- u32 nets; /* number of elements per cidr */
+ u32 nets[IPSET_NET_COUNT]; /* number of elements per cidr */
+ u8 cidr[IPSET_NET_COUNT]; /* the different cidr values in the set */
};
/* Compute the hash table size */
@@ -165,13 +169,13 @@ hbucket_elem_add(struct hbucket *n, u8 ahash_max, size_t dsize)
#define SET_HOST_MASK(family) (family == AF_INET ? 32 : 128)
#ifdef IP_SET_HASH_WITH_MULTI
-#define NETS_LENGTH(family) (SET_HOST_MASK(family) + 1)
+#define NLEN(family) (SET_HOST_MASK(family) + 1)
#else
-#define NETS_LENGTH(family) SET_HOST_MASK(family)
+#define NLEN(family) SET_HOST_MASK(family)
#endif
#else
-#define NETS_LENGTH(family) 0
+#define NLEN(family) 0
#endif /* IP_SET_HASH_WITH_NETS */
#define ext_timeout(e, h) \
@@ -296,49 +300,49 @@ struct htype {
/* Network cidr size book keeping when the hash stores different
* sized networks */
static void
-mtype_add_cidr(struct htype *h, u8 cidr, u8 nets_length)
+mtype_add_cidr(struct htype *h, u8 cidr, u8 nets_length, u8 n)
{
int i, j;
/* Add in increasing prefix order, so larger cidr first */
- for (i = 0, j = -1; i < nets_length && h->nets[i].nets; i++) {
+ for (i = 0, j = -1; i < nets_length && h->nets[i].nets[n]; i++) {
if (j != -1)
continue;
- else if (h->nets[i].cidr < cidr)
+ else if (h->nets[i].cidr[n] < cidr)
j = i;
- else if (h->nets[i].cidr == cidr) {
- h->nets[i].nets++;
+ else if (h->nets[i].cidr[n] == cidr) {
+ h->nets[i].nets[n]++;
return;
}
}
if (j != -1) {
for (; i > j; i--) {
- h->nets[i].cidr = h->nets[i - 1].cidr;
- h->nets[i].nets = h->nets[i - 1].nets;
+ h->nets[i].cidr[n] = h->nets[i - 1].cidr[n];
+ h->nets[i].nets[n] = h->nets[i - 1].nets[n];
}
}
- h->nets[i].cidr = cidr;
- h->nets[i].nets = 1;
+ h->nets[i].cidr[n] = cidr;
+ h->nets[i].nets[n] = 1;
}
static void
-mtype_del_cidr(struct htype *h, u8 cidr, u8 nets_length)
+mtype_del_cidr(struct htype *h, u8 cidr, u8 nets_length, u8 n)
{
u8 i, j, net_end = nets_length - 1;
for (i = 0; i < nets_length; i++) {
- if (h->nets[i].cidr != cidr)
+ if (h->nets[i].cidr[n] != cidr)
continue;
- if (h->nets[i].nets > 1 || i == net_end ||
- h->nets[i + 1].nets == 0) {
- h->nets[i].nets--;
+ if (h->nets[i].nets[n] > 1 || i == net_end ||
+ h->nets[i + 1].nets[n] == 0) {
+ h->nets[i].nets[n]--;
return;
}
- for (j = i; j < net_end && h->nets[j].nets; j++) {
- h->nets[j].cidr = h->nets[j + 1].cidr;
- h->nets[j].nets = h->nets[j + 1].nets;
+ for (j = i; j < net_end && h->nets[j].nets[n]; j++) {
+ h->nets[j].cidr[n] = h->nets[j + 1].cidr[n];
+ h->nets[j].nets[n] = h->nets[j + 1].nets[n];
}
- h->nets[j].nets = 0;
+ h->nets[j].nets[n] = 0;
return;
}
}
@@ -382,8 +386,7 @@ mtype_flush(struct ip_set *set)
}
}
#ifdef IP_SET_HASH_WITH_NETS
- memset(h->nets, 0, sizeof(struct net_prefixes)
- * NETS_LENGTH(set->family));
+ memset(h->nets, 0, sizeof(struct net_prefixes) * NLEN(set->family));
#endif
h->elements = 0;
}
@@ -459,7 +462,7 @@ mtype_expire(struct htype *h, u8 nets_length, size_t dsize)
pr_debug("expired %u/%u\n", i, j);
#ifdef IP_SET_HASH_WITH_NETS
mtype_del_cidr(h, CIDR(data->cidr),
- nets_length);
+ nets_length, 0);
#endif
if (j != n->pos - 1)
/* Not last one */
@@ -494,7 +497,7 @@ mtype_gc(unsigned long ul_set)
pr_debug("called\n");
write_lock_bh(&set->lock);
- mtype_expire(h, NETS_LENGTH(set->family), h->dsize);
+ mtype_expire(h, NLEN(set->family), h->dsize);
write_unlock_bh(&set->lock);
h->gc.expires = jiffies + IPSET_GC_PERIOD(h->timeout) * HZ;
@@ -523,8 +526,7 @@ mtype_resize(struct ip_set *set, bool retried)
if (SET_WITH_TIMEOUT(set) && !retried) {
i = h->elements;
write_lock_bh(&set->lock);
- mtype_expire(set->data, NETS_LENGTH(set->family),
- h->dsize);
+ mtype_expire(set->data, NLEN(set->family), h->dsize);
write_unlock_bh(&set->lock);
if (h->elements < i)
return 0;
@@ -607,7 +609,7 @@ mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
if (SET_WITH_TIMEOUT(set) && h->elements >= h->maxelem)
/* FIXME: when set is full, we slow down here */
- mtype_expire(h, NETS_LENGTH(set->family), h->dsize);
+ mtype_expire(h, NLEN(set->family), h->dsize);
if (h->elements >= h->maxelem) {
if (net_ratelimit())
@@ -645,8 +647,8 @@ reuse_slot:
/* Fill out reused slot */
data = ahash_data(n, j, h->dsize);
#ifdef IP_SET_HASH_WITH_NETS
- mtype_del_cidr(h, CIDR(data->cidr), NETS_LENGTH(set->family));
- mtype_add_cidr(h, CIDR(d->cidr), NETS_LENGTH(set->family));
+ mtype_del_cidr(h, CIDR(data->cidr), NLEN(set->family), 0);
+ mtype_add_cidr(h, CIDR(d->cidr), NLEN(set->family), 0);
#endif
} else {
/* Use/create a new slot */
@@ -659,7 +661,7 @@ reuse_slot:
}
data = ahash_data(n, n->pos++, h->dsize);
#ifdef IP_SET_HASH_WITH_NETS
- mtype_add_cidr(h, CIDR(d->cidr), NETS_LENGTH(set->family));
+ mtype_add_cidr(h, CIDR(d->cidr), NLEN(set->family), 0);
#endif
h->elements++;
}
@@ -711,7 +713,7 @@ mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
n->pos--;
h->elements--;
#ifdef IP_SET_HASH_WITH_NETS
- mtype_del_cidr(h, CIDR(d->cidr), NETS_LENGTH(set->family));
+ mtype_del_cidr(h, CIDR(d->cidr), NLEN(set->family), 0);
#endif
if (n->pos + AHASH_INIT_SIZE < n->size) {
void *tmp = kzalloc((n->size - AHASH_INIT_SIZE)
@@ -760,11 +762,11 @@ mtype_test_cidrs(struct ip_set *set, struct mtype_elem *d,
struct mtype_elem *data;
int i, j = 0;
u32 key, multi = 0;
- u8 nets_length = NETS_LENGTH(set->family);
+ u8 nets_length = NLEN(set->family);
pr_debug("test by nets\n");
- for (; j < nets_length && h->nets[j].nets && !multi; j++) {
- mtype_data_netmask(d, h->nets[j].cidr);
+ for (; j < nets_length && h->nets[j].nets[0] && !multi; j++) {
+ mtype_data_netmask(d, h->nets[j].cidr[0]);
key = HKEY(d, h->initval, t->htable_bits);
n = hbucket(t, key);
for (i = 0; i < n->pos; i++) {
@@ -839,7 +841,7 @@ mtype_head(struct ip_set *set, struct sk_buff *skb)
size_t memsize;
t = rcu_dereference_bh_nfnl(h->table);
- memsize = mtype_ahash_memsize(h, t, NETS_LENGTH(set->family));
+ memsize = mtype_ahash_memsize(h, t, NLEN(set->family));
nested = ipset_nest_start(skb, IPSET_ATTR_DATA);
if (!nested)
diff --git a/net/netfilter/ipset/ip_set_hash_ipportnet.c b/net/netfilter/ipset/ip_set_hash_ipportnet.c
index f111558..6ce5a8e 100644
--- a/net/netfilter/ipset/ip_set_hash_ipportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_ipportnet.c
@@ -170,7 +170,7 @@ hash_ipportnet4_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_ipportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ipportnet4_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
@@ -454,7 +454,7 @@ hash_ipportnet6_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_ipportnet *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_ipportnet6_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
diff --git a/net/netfilter/ipset/ip_set_hash_net.c b/net/netfilter/ipset/ip_set_hash_net.c
index 0a64dad..ec1c7dc 100644
--- a/net/netfilter/ipset/ip_set_hash_net.c
+++ b/net/netfilter/ipset/ip_set_hash_net.c
@@ -143,7 +143,7 @@ hash_net4_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_net *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_net4_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
@@ -338,7 +338,7 @@ hash_net6_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_net *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_net6_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index 846371b..814b4e3 100644
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -265,7 +265,7 @@ hash_netiface4_kadt(struct ip_set *set, const struct sk_buff *skb,
struct hash_netiface *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netiface4_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK,
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
.elem = 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
@@ -534,7 +534,7 @@ hash_netiface6_kadt(struct ip_set *set, const struct sk_buff *skb,
struct hash_netiface *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netiface6_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK,
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK),
.elem = 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
diff --git a/net/netfilter/ipset/ip_set_hash_netport.c b/net/netfilter/ipset/ip_set_hash_netport.c
index d98a685..3bd923d 100644
--- a/net/netfilter/ipset/ip_set_hash_netport.c
+++ b/net/netfilter/ipset/ip_set_hash_netport.c
@@ -162,7 +162,7 @@ hash_netport4_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_netport *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netport4_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
@@ -407,7 +407,7 @@ hash_netport6_kadt(struct ip_set *set, const struct sk_buff *skb,
const struct hash_netport *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netport6_elem e = {
- .cidr = h->nets[0].cidr ? h->nets[0].cidr - 1 : HOST_MASK - 1,
+ .cidr = IP_SET_INIT_CIDR(h->nets[0].cidr[0], HOST_MASK) - 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, h);
--
1.7.10.4
--
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