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Message-Id: <1308253640-29942-20-git-send-email-kaber@trash.net>
Date: Thu, 16 Jun 2011 21:47:19 +0200
From: kaber@...sh.net
To: davem@...emloft.net
Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 19/20] netfilter: ipset: hash:net,iface type introduced
From: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
The hash:net,iface type makes possible to store network address and
interface name pairs in a set. It's mostly suitable for egress
and ingress filtering. Examples:
# ipset create test hash:net,iface
# ipset add test 192.168.0.0/16,eth0
# ipset add test 192.168.0.0/24,eth1
Signed-off-by: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@...sh.net>
---
include/linux/netfilter/ipset/ip_set.h | 5 +
include/linux/netfilter/ipset/ip_set_ahash.h | 6 +
net/netfilter/ipset/Kconfig | 10 +
net/netfilter/ipset/Makefile | 1 +
net/netfilter/ipset/ip_set_hash_netiface.c | 762 ++++++++++++++++++++++++++
5 files changed, 784 insertions(+), 0 deletions(-)
create mode 100644 net/netfilter/ipset/ip_set_hash_netiface.c
diff --git a/include/linux/netfilter/ipset/ip_set.h b/include/linux/netfilter/ipset/ip_set.h
index 8955165..e409173 100644
--- a/include/linux/netfilter/ipset/ip_set.h
+++ b/include/linux/netfilter/ipset/ip_set.h
@@ -105,6 +105,7 @@ enum {
IPSET_ATTR_IP2,
IPSET_ATTR_CIDR2,
IPSET_ATTR_IP2_TO,
+ IPSET_ATTR_IFACE,
__IPSET_ATTR_ADT_MAX,
};
#define IPSET_ATTR_ADT_MAX (__IPSET_ATTR_ADT_MAX - 1)
@@ -153,6 +154,8 @@ enum ipset_cmd_flags {
enum ipset_cadt_flags {
IPSET_FLAG_BIT_BEFORE = 0,
IPSET_FLAG_BEFORE = (1 << IPSET_FLAG_BIT_BEFORE),
+ IPSET_FLAG_BIT_PHYSDEV = 1,
+ IPSET_FLAG_PHYSDEV = (1 << IPSET_FLAG_BIT_PHYSDEV),
};
/* Commands with settype-specific attributes */
@@ -212,6 +215,8 @@ enum ip_set_feature {
IPSET_TYPE_IP2 = (1 << IPSET_TYPE_IP2_FLAG),
IPSET_TYPE_NAME_FLAG = 4,
IPSET_TYPE_NAME = (1 << IPSET_TYPE_NAME_FLAG),
+ IPSET_TYPE_IFACE_FLAG = 5,
+ IPSET_TYPE_IFACE = (1 << IPSET_TYPE_IFACE_FLAG),
/* Strictly speaking not a feature, but a flag for dumping:
* this settype must be dumped last */
IPSET_DUMP_LAST_FLAG = 7,
diff --git a/include/linux/netfilter/ipset/ip_set_ahash.h b/include/linux/netfilter/ipset/ip_set_ahash.h
index 1c977e1..8a0999a 100644
--- a/include/linux/netfilter/ipset/ip_set_ahash.h
+++ b/include/linux/netfilter/ipset/ip_set_ahash.h
@@ -63,6 +63,9 @@ struct ip_set_hash {
#ifdef IP_SET_HASH_WITH_NETMASK
u8 netmask; /* netmask value for subnets to store */
#endif
+#ifdef IP_SET_HASH_WITH_RBTREE
+ struct rb_root rbtree;
+#endif
#ifdef IP_SET_HASH_WITH_NETS
struct ip_set_hash_nets nets[0]; /* book-keeping of prefixes */
#endif
@@ -200,6 +203,9 @@ ip_set_hash_destroy(struct ip_set *set)
del_timer_sync(&h->gc);
ahash_destroy(h->table);
+#ifdef IP_SET_HASH_WITH_RBTREE
+ rbtree_destroy(&h->rbtree);
+#endif
kfree(h);
set->data = NULL;
diff --git a/net/netfilter/ipset/Kconfig b/net/netfilter/ipset/Kconfig
index 2c5b348..ba36c28 100644
--- a/net/netfilter/ipset/Kconfig
+++ b/net/netfilter/ipset/Kconfig
@@ -109,6 +109,16 @@ config IP_SET_HASH_NETPORT
To compile it as a module, choose M here. If unsure, say N.
+config IP_SET_HASH_NETIFACE
+ tristate "hash:net,iface set support"
+ depends on IP_SET
+ help
+ This option adds the hash:net,iface set type support, by which
+ one can store IPv4/IPv6 network address/prefix and
+ interface name pairs as elements in a set.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config IP_SET_LIST_SET
tristate "list:set set support"
depends on IP_SET
diff --git a/net/netfilter/ipset/Makefile b/net/netfilter/ipset/Makefile
index 5adbdab..6e965ec 100644
--- a/net/netfilter/ipset/Makefile
+++ b/net/netfilter/ipset/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_IP_SET_HASH_IPPORTIP) += ip_set_hash_ipportip.o
obj-$(CONFIG_IP_SET_HASH_IPPORTNET) += ip_set_hash_ipportnet.o
obj-$(CONFIG_IP_SET_HASH_NET) += ip_set_hash_net.o
obj-$(CONFIG_IP_SET_HASH_NETPORT) += ip_set_hash_netport.o
+obj-$(CONFIG_IP_SET_HASH_NETIFACE) += ip_set_hash_netiface.o
# list types
obj-$(CONFIG_IP_SET_LIST_SET) += ip_set_list_set.o
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
new file mode 100644
index 0000000..51e5df1
--- /dev/null
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -0,0 +1,762 @@
+/* Copyright (C) 2011 Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/* Kernel module implementing an IP set type: the hash:net,iface type */
+
+#include <linux/jhash.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/random.h>
+#include <linux/rbtree.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/netlink.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/ipset/pfxlen.h>
+#include <linux/netfilter/ipset/ip_set.h>
+#include <linux/netfilter/ipset/ip_set_timeout.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>");
+MODULE_DESCRIPTION("hash:net,iface type of IP sets");
+MODULE_ALIAS("ip_set_hash:net,iface");
+
+/* Interface name rbtree */
+
+struct iface_node {
+ struct rb_node node;
+ char iface[IFNAMSIZ];
+};
+
+#define iface_data(n) (rb_entry(n, struct iface_node, node)->iface)
+
+static inline long
+ifname_compare(const char *_a, const char *_b)
+{
+ const long *a = (const long *)_a;
+ const long *b = (const long *)_b;
+
+ BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
+ if (a[0] != b[0])
+ return a[0] - b[0];
+ if (IFNAMSIZ > sizeof(long)) {
+ if (a[1] != b[1])
+ return a[1] - b[1];
+ }
+ if (IFNAMSIZ > 2 * sizeof(long)) {
+ if (a[2] != b[2])
+ return a[2] - b[2];
+ }
+ if (IFNAMSIZ > 3 * sizeof(long)) {
+ if (a[3] != b[3])
+ return a[3] - b[3];
+ }
+ return 0;
+}
+
+static void
+rbtree_destroy(struct rb_root *root)
+{
+ struct rb_node *p, *n = root->rb_node;
+ struct iface_node *node;
+
+ /* Non-recursive destroy, like in ext3 */
+ while (n) {
+ if (n->rb_left) {
+ n = n->rb_left;
+ continue;
+ }
+ if (n->rb_right) {
+ n = n->rb_right;
+ continue;
+ }
+ p = rb_parent(n);
+ node = rb_entry(n, struct iface_node, node);
+ if (!p)
+ *root = RB_ROOT;
+ else if (p->rb_left == n)
+ p->rb_left = NULL;
+ else if (p->rb_right == n)
+ p->rb_right = NULL;
+
+ kfree(node);
+ n = p;
+ }
+}
+
+static int
+iface_test(struct rb_root *root, const char **iface)
+{
+ struct rb_node *n = root->rb_node;
+
+ while (n) {
+ const char *d = iface_data(n);
+ int res = ifname_compare(*iface, d);
+
+ if (res < 0)
+ n = n->rb_left;
+ else if (res > 0)
+ n = n->rb_right;
+ else {
+ *iface = d;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int
+iface_add(struct rb_root *root, const char **iface)
+{
+ struct rb_node **n = &(root->rb_node), *p = NULL;
+ struct iface_node *d;
+
+ while (*n) {
+ char *ifname = iface_data(*n);
+ int res = ifname_compare(*iface, ifname);
+
+ p = *n;
+ if (res < 0)
+ n = &((*n)->rb_left);
+ else if (res > 0)
+ n = &((*n)->rb_right);
+ else {
+ *iface = ifname;
+ return 0;
+ }
+ }
+
+ d = kzalloc(sizeof(*d), GFP_ATOMIC);
+ if (!d)
+ return -ENOMEM;
+ strcpy(d->iface, *iface);
+
+ rb_link_node(&d->node, p, n);
+ rb_insert_color(&d->node, root);
+
+ *iface = d->iface;
+ return 0;
+}
+
+/* Type specific function prefix */
+#define TYPE hash_netiface
+
+static bool
+hash_netiface_same_set(const struct ip_set *a, const struct ip_set *b);
+
+#define hash_netiface4_same_set hash_netiface_same_set
+#define hash_netiface6_same_set hash_netiface_same_set
+
+#define STREQ(a, b) (strcmp(a, b) == 0)
+
+/* The type variant functions: IPv4 */
+
+/* Member elements without timeout */
+struct hash_netiface4_elem {
+ __be32 ip;
+ const char *iface;
+ u8 physdev;
+ u8 cidr;
+ u16 padding;
+};
+
+/* Member elements with timeout support */
+struct hash_netiface4_telem {
+ __be32 ip;
+ const char *iface;
+ u8 physdev;
+ u8 cidr;
+ u16 padding;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_netiface4_data_equal(const struct hash_netiface4_elem *ip1,
+ const struct hash_netiface4_elem *ip2)
+{
+ return ip1->ip == ip2->ip &&
+ ip1->cidr == ip2->cidr &&
+ ip1->physdev == ip2->physdev &&
+ ip1->iface == ip2->iface;
+}
+
+static inline bool
+hash_netiface4_data_isnull(const struct hash_netiface4_elem *elem)
+{
+ return elem->cidr == 0;
+}
+
+static inline void
+hash_netiface4_data_copy(struct hash_netiface4_elem *dst,
+ const struct hash_netiface4_elem *src) {
+ dst->ip = src->ip;
+ dst->cidr = src->cidr;
+ dst->physdev = src->physdev;
+ dst->iface = src->iface;
+}
+
+static inline void
+hash_netiface4_data_netmask(struct hash_netiface4_elem *elem, u8 cidr)
+{
+ elem->ip &= ip_set_netmask(cidr);
+ elem->cidr = cidr;
+}
+
+static inline void
+hash_netiface4_data_zero_out(struct hash_netiface4_elem *elem)
+{
+ elem->cidr = 0;
+}
+
+static bool
+hash_netiface4_data_list(struct sk_buff *skb,
+ const struct hash_netiface4_elem *data)
+{
+ u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+ NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+ NLA_PUT_STRING(skb, IPSET_ATTR_IFACE, data->iface);
+ if (flags)
+ NLA_PUT_NET32(skb, IPSET_ATTR_CADT_FLAGS, flags);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_netiface4_data_tlist(struct sk_buff *skb,
+ const struct hash_netiface4_elem *data)
+{
+ const struct hash_netiface4_telem *tdata =
+ (const struct hash_netiface4_telem *)data;
+ u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+
+ NLA_PUT_IPADDR4(skb, IPSET_ATTR_IP, data->ip);
+ NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+ NLA_PUT_STRING(skb, IPSET_ATTR_IFACE, data->iface);
+ if (flags)
+ NLA_PUT_NET32(skb, IPSET_ATTR_CADT_FLAGS, flags);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(tdata->timeout)));
+
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#define IP_SET_HASH_WITH_NETS
+#define IP_SET_HASH_WITH_RBTREE
+
+#define PF 4
+#define HOST_MASK 32
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static inline void
+hash_netiface4_data_next(struct ip_set_hash *h,
+ const struct hash_netiface4_elem *d)
+{
+ h->next.ip = ntohl(d->ip);
+}
+
+static int
+hash_netiface4_kadt(struct ip_set *set, const struct sk_buff *skb,
+ const struct xt_action_param *par,
+ enum ipset_adt adt, const struct ip_set_adt_opt *opt)
+{
+ struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_netiface4_elem data = {
+ .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
+ };
+ int ret;
+
+ if (data.cidr == 0)
+ return -EINVAL;
+ if (adt == IPSET_TEST)
+ data.cidr = HOST_MASK;
+
+ ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip);
+ data.ip &= ip_set_netmask(data.cidr);
+
+#define IFACE(dir) (par->dir ? par->dir->name : NULL)
+#define PHYSDEV(dir) (nf_bridge->dir ? nf_bridge->dir->name : NULL)
+#define SRCDIR (opt->flags & IPSET_DIM_TWO_SRC)
+
+ if (opt->cmdflags & IPSET_FLAG_PHYSDEV) {
+#ifdef CONFIG_BRIDGE_NETFILTER
+ const struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+ if (!nf_bridge)
+ return -EINVAL;
+ data.iface = SRCDIR ? PHYSDEV(physindev): PHYSDEV(physoutdev);
+ data.physdev = 1;
+#else
+ data.iface = NULL;
+#endif
+ } else
+ data.iface = SRCDIR ? IFACE(in) : IFACE(out);
+
+ if (!data.iface)
+ return -EINVAL;
+ ret = iface_test(&h->rbtree, &data.iface);
+ if (adt == IPSET_ADD) {
+ if (!ret) {
+ ret = iface_add(&h->rbtree, &data.iface);
+ if (ret)
+ return ret;
+ }
+ } else if (!ret)
+ return ret;
+
+ return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
+}
+
+static int
+hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
+{
+ struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_netiface4_elem data = { .cidr = HOST_MASK };
+ u32 ip = 0, ip_to, last;
+ u32 timeout = h->timeout;
+ char iface[IFNAMSIZ] = {};
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !tb[IPSET_ATTR_IFACE] ||
+ !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_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip);
+ if (ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_CIDR]) {
+ data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+ if (!data.cidr)
+ return -IPSET_ERR_INVALID_CIDR;
+ }
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ if (!with_timeout(h->timeout))
+ return -IPSET_ERR_TIMEOUT;
+ timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+ }
+
+ strcpy(iface, nla_data(tb[IPSET_ATTR_IFACE]));
+ data.iface = iface;
+ ret = iface_test(&h->rbtree, &data.iface);
+ if (adt == IPSET_ADD) {
+ if (!ret) {
+ ret = iface_add(&h->rbtree, &data.iface);
+ if (ret)
+ return ret;
+ }
+ } else if (!ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_CADT_FLAGS]) {
+ u32 flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
+ if (flags & IPSET_FLAG_PHYSDEV)
+ data.physdev = 1;
+ }
+
+ if (adt == IPSET_TEST || !tb[IPSET_ATTR_IP_TO]) {
+ data.ip = htonl(ip & ip_set_hostmask(data.cidr));
+ ret = adtfn(set, &data, timeout, flags);
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+ }
+
+ if (tb[IPSET_ATTR_IP_TO]) {
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
+ if (ret)
+ return ret;
+ if (ip_to < ip)
+ swap(ip, ip_to);
+ if (ip + UINT_MAX == ip_to)
+ return -IPSET_ERR_HASH_RANGE;
+ } else {
+ ip_set_mask_from_to(ip, ip_to, data.cidr);
+ }
+
+ if (retried)
+ ip = h->next.ip;
+ while (!after(ip, ip_to)) {
+ data.ip = htonl(ip);
+ last = ip_set_range_to_cidr(ip, ip_to, &data.cidr);
+ ret = adtfn(set, &data, timeout, flags);
+
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+ ip = last + 1;
+ }
+ return ret;
+}
+
+static bool
+hash_netiface_same_set(const struct ip_set *a, const struct ip_set *b)
+{
+ const struct ip_set_hash *x = a->data;
+ const struct ip_set_hash *y = b->data;
+
+ /* Resizing changes htable_bits, so we ignore it */
+ return x->maxelem == y->maxelem &&
+ x->timeout == y->timeout;
+}
+
+/* The type variant functions: IPv6 */
+
+struct hash_netiface6_elem {
+ union nf_inet_addr ip;
+ const char *iface;
+ u8 physdev;
+ u8 cidr;
+ u16 padding;
+};
+
+struct hash_netiface6_telem {
+ union nf_inet_addr ip;
+ const char *iface;
+ u8 physdev;
+ u8 cidr;
+ u16 padding;
+ unsigned long timeout;
+};
+
+static inline bool
+hash_netiface6_data_equal(const struct hash_netiface6_elem *ip1,
+ const struct hash_netiface6_elem *ip2)
+{
+ return ipv6_addr_cmp(&ip1->ip.in6, &ip2->ip.in6) == 0 &&
+ ip1->cidr == ip2->cidr &&
+ ip1->physdev == ip2->physdev &&
+ ip1->iface == ip2->iface;
+}
+
+static inline bool
+hash_netiface6_data_isnull(const struct hash_netiface6_elem *elem)
+{
+ return elem->cidr == 0;
+}
+
+static inline void
+hash_netiface6_data_copy(struct hash_netiface6_elem *dst,
+ const struct hash_netiface6_elem *src)
+{
+ memcpy(dst, src, sizeof(*dst));
+}
+
+static inline void
+hash_netiface6_data_zero_out(struct hash_netiface6_elem *elem)
+{
+}
+
+static inline void
+ip6_netmask(union nf_inet_addr *ip, u8 prefix)
+{
+ ip->ip6[0] &= ip_set_netmask6(prefix)[0];
+ ip->ip6[1] &= ip_set_netmask6(prefix)[1];
+ ip->ip6[2] &= ip_set_netmask6(prefix)[2];
+ ip->ip6[3] &= ip_set_netmask6(prefix)[3];
+}
+
+static inline void
+hash_netiface6_data_netmask(struct hash_netiface6_elem *elem, u8 cidr)
+{
+ ip6_netmask(&elem->ip, cidr);
+ elem->cidr = cidr;
+}
+
+static bool
+hash_netiface6_data_list(struct sk_buff *skb,
+ const struct hash_netiface6_elem *data)
+{
+ u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &data->ip);
+ NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+ NLA_PUT_STRING(skb, IPSET_ATTR_IFACE, data->iface);
+ if (flags)
+ NLA_PUT_NET32(skb, IPSET_ATTR_CADT_FLAGS, flags);
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static bool
+hash_netiface6_data_tlist(struct sk_buff *skb,
+ const struct hash_netiface6_elem *data)
+{
+ const struct hash_netiface6_telem *e =
+ (const struct hash_netiface6_telem *)data;
+ u32 flags = data->physdev ? IPSET_FLAG_PHYSDEV : 0;
+
+ NLA_PUT_IPADDR6(skb, IPSET_ATTR_IP, &e->ip);
+ NLA_PUT_U8(skb, IPSET_ATTR_CIDR, data->cidr);
+ NLA_PUT_STRING(skb, IPSET_ATTR_IFACE, data->iface);
+ if (flags)
+ NLA_PUT_NET32(skb, IPSET_ATTR_CADT_FLAGS, flags);
+ NLA_PUT_NET32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(ip_set_timeout_get(e->timeout)));
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+#undef PF
+#undef HOST_MASK
+
+#define PF 6
+#define HOST_MASK 128
+#include <linux/netfilter/ipset/ip_set_ahash.h>
+
+static inline void
+hash_netiface6_data_next(struct ip_set_hash *h,
+ const struct hash_netiface6_elem *d)
+{
+}
+
+static int
+hash_netiface6_kadt(struct ip_set *set, const struct sk_buff *skb,
+ const struct xt_action_param *par,
+ enum ipset_adt adt, const struct ip_set_adt_opt *opt)
+{
+ struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_netiface6_elem data = {
+ .cidr = h->nets[0].cidr ? h->nets[0].cidr : HOST_MASK
+ };
+ int ret;
+
+ if (data.cidr == 0)
+ return -EINVAL;
+ if (adt == IPSET_TEST)
+ data.cidr = HOST_MASK;
+
+ ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &data.ip.in6);
+ ip6_netmask(&data.ip, data.cidr);
+
+ if (opt->cmdflags & IPSET_FLAG_PHYSDEV) {
+#ifdef CONFIG_BRIDGE_NETFILTER
+ const struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+ if (!nf_bridge)
+ return -EINVAL;
+ data.iface = SRCDIR ? PHYSDEV(physindev): PHYSDEV(physoutdev);
+ data.physdev = 1;
+#else
+ data.iface = NULL;
+#endif
+ } else
+ data.iface = SRCDIR ? IFACE(in) : IFACE(out);
+
+ if (!data.iface)
+ return -EINVAL;
+ ret = iface_test(&h->rbtree, &data.iface);
+ if (adt == IPSET_ADD) {
+ if (!ret) {
+ ret = iface_add(&h->rbtree, &data.iface);
+ if (ret)
+ return ret;
+ }
+ } else if (!ret)
+ return ret;
+
+ return adtfn(set, &data, opt_timeout(opt, h), opt->cmdflags);
+}
+
+static int
+hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
+{
+ struct ip_set_hash *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_netiface6_elem data = { .cidr = HOST_MASK };
+ u32 timeout = h->timeout;
+ char iface[IFNAMSIZ] = {};
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !tb[IPSET_ATTR_IFACE] ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
+ return -IPSET_ERR_PROTOCOL;
+ if (unlikely(tb[IPSET_ATTR_IP_TO]))
+ return -IPSET_ERR_HASH_RANGE_UNSUPPORTED;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &data.ip);
+ if (ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_CIDR])
+ data.cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+ if (!data.cidr)
+ return -IPSET_ERR_INVALID_CIDR;
+ ip6_netmask(&data.ip, data.cidr);
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ if (!with_timeout(h->timeout))
+ return -IPSET_ERR_TIMEOUT;
+ timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+ }
+
+ strcpy(iface, nla_data(tb[IPSET_ATTR_IFACE]));
+ data.iface = iface;
+ ret = iface_test(&h->rbtree, &data.iface);
+ if (adt == IPSET_ADD) {
+ if (!ret) {
+ ret = iface_add(&h->rbtree, &data.iface);
+ if (ret)
+ return ret;
+ }
+ } else if (!ret)
+ return ret;
+
+ if (tb[IPSET_ATTR_CADT_FLAGS]) {
+ u32 flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
+ if (flags & IPSET_FLAG_PHYSDEV)
+ data.physdev = 1;
+ }
+
+ ret = adtfn(set, &data, timeout, flags);
+
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+}
+
+/* Create hash:ip type of sets */
+
+static int
+hash_netiface_create(struct ip_set *set, struct nlattr *tb[], u32 flags)
+{
+ struct ip_set_hash *h;
+ u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
+ u8 hbits;
+
+ if (!(set->family == AF_INET || set->family == AF_INET6))
+ return -IPSET_ERR_INVALID_FAMILY;
+
+ if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_HASHSIZE]) {
+ hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
+ if (hashsize < IPSET_MIMINAL_HASHSIZE)
+ hashsize = IPSET_MIMINAL_HASHSIZE;
+ }
+
+ if (tb[IPSET_ATTR_MAXELEM])
+ maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
+
+ h = kzalloc(sizeof(*h)
+ + sizeof(struct ip_set_hash_nets)
+ * (set->family == AF_INET ? 32 : 128), GFP_KERNEL);
+ if (!h)
+ return -ENOMEM;
+
+ h->maxelem = maxelem;
+ get_random_bytes(&h->initval, sizeof(h->initval));
+ h->timeout = IPSET_NO_TIMEOUT;
+
+ hbits = htable_bits(hashsize);
+ h->table = ip_set_alloc(
+ sizeof(struct htable)
+ + jhash_size(hbits) * sizeof(struct hbucket));
+ if (!h->table) {
+ kfree(h);
+ return -ENOMEM;
+ }
+ h->table->htable_bits = hbits;
+ h->rbtree = RB_ROOT;
+
+ set->data = h;
+
+ if (tb[IPSET_ATTR_TIMEOUT]) {
+ h->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
+
+ set->variant = set->family == AF_INET
+ ? &hash_netiface4_tvariant : &hash_netiface6_tvariant;
+
+ if (set->family == AF_INET)
+ hash_netiface4_gc_init(set);
+ else
+ hash_netiface6_gc_init(set);
+ } else {
+ set->variant = set->family == AF_INET
+ ? &hash_netiface4_variant : &hash_netiface6_variant;
+ }
+
+ pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
+ set->name, jhash_size(h->table->htable_bits),
+ h->table->htable_bits, h->maxelem, set->data, h->table);
+
+ return 0;
+}
+
+static struct ip_set_type hash_netiface_type __read_mostly = {
+ .name = "hash:net,iface",
+ .protocol = IPSET_PROTOCOL,
+ .features = IPSET_TYPE_IP | IPSET_TYPE_IFACE,
+ .dimension = IPSET_DIM_TWO,
+ .family = AF_UNSPEC,
+ .revision_min = 0,
+ .create = hash_netiface_create,
+ .create_policy = {
+ [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
+ [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
+ [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
+ [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
+ [IPSET_ATTR_PROTO] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ },
+ .adt_policy = {
+ [IPSET_ATTR_IP] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IFACE] = { .type = NLA_NUL_STRING,
+ .len = IPSET_MAXNAMELEN - 1 },
+ [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
+ [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init
+hash_netiface_init(void)
+{
+ return ip_set_type_register(&hash_netiface_type);
+}
+
+static void __exit
+hash_netiface_fini(void)
+{
+ ip_set_type_unregister(&hash_netiface_type);
+}
+
+module_init(hash_netiface_init);
+module_exit(hash_netiface_fini);
--
1.7.2.3
--
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