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Commit bd55389c authored by Jozsef Kadlecsik's avatar Jozsef Kadlecsik
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netfilter:ipset Remove rbtree from hash:net,iface 

Remove rbtree in order to introduce RCU instead of rwlock in ipset
Signed-off-by: default avatarJozsef Kadlecsik <kadlec@blackhole.kfki.hu>
parent 9c1ba5c8
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Showing with 20 additions and 143 deletions
net/netfilter/ipset/ip_set_hash_netiface.c
View file @ bd55389c
......@@ -13,7 +13,6 @@
#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>
......@@ -37,88 +36,13 @@ MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>");
IP_SET_MODULE_DESC("hash:net,iface", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
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 void
rbtree_destroy(struct rb_root *root)
{
struct iface_node *node, *next;
rbtree_postorder_for_each_entry_safe(node, next, root, node)
kfree(node);
*root = RB_ROOT;
}
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 = strcmp(*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 = strcmp(*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 HTYPE hash_netiface
#define IP_SET_HASH_WITH_NETS
#define IP_SET_HASH_WITH_RBTREE
#define IP_SET_HASH_WITH_MULTI
#define IP_SET_HASH_WITH_NET0
#define STREQ(a, b) (strcmp(a, b) == 0)
#define STRLCPY(a, b) strlcpy(a, b, IFNAMSIZ)
/* IPv4 variant */
......@@ -137,7 +61,7 @@ struct hash_netiface4_elem {
u8 cidr;
u8 nomatch;
u8 elem;
const char *iface;
char iface[IFNAMSIZ];
};
/* Common functions */
......@@ -151,7 +75,7 @@ hash_netiface4_data_equal(const struct hash_netiface4_elem *ip1,
ip1->cidr == ip2->cidr &&
(++*multi) &&
ip1->physdev == ip2->physdev &&
ip1->iface == ip2->iface;
strcmp(ip1->iface, ip2->iface) == 0;
}
static inline int
......@@ -239,7 +163,6 @@ hash_netiface4_kadt(struct ip_set *set, const struct sk_buff *skb,
.elem = 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
int ret;
if (e.cidr == 0)
return -EINVAL;
......@@ -249,35 +172,24 @@ hash_netiface4_kadt(struct ip_set *set, const struct sk_buff *skb,
ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
e.ip &= ip_set_netmask(e.cidr);
#define IFACE(dir) (par->dir ? par->dir->name : NULL)
#define IFACE(dir) (par->dir ? par->dir->name : "")
#define SRCDIR (opt->flags & IPSET_DIM_TWO_SRC)
if (opt->cmdflags & IPSET_FLAG_PHYSDEV) {
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
e.iface = SRCDIR ? get_physindev_name(skb) :
get_phyoutdev_name(skb);
const char *eiface = SRCDIR ? get_physindev_name(skb) :
get_phyoutdev_name(skb);
if (!e.iface)
if (!eiface)
return -EINVAL;
STRLCPY(e.iface, eiface);
e.physdev = 1;
#else
e.iface = NULL;
#endif
} else
e.iface = SRCDIR ? IFACE(in) : IFACE(out);
STRLCPY(e.iface, SRCDIR ? IFACE(in) : IFACE(out));
if (!e.iface)
if (strlen(e.iface) == 0)
return -EINVAL;
ret = iface_test(&h->rbtree, &e.iface);
if (adt == IPSET_ADD) {
if (!ret) {
ret = iface_add(&h->rbtree, &e.iface);
if (ret)
return ret;
}
} else if (!ret)
return ret;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
......@@ -290,7 +202,6 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
struct hash_netiface4_elem e = { .cidr = HOST_MASK, .elem = 1 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
u32 ip = 0, ip_to = 0, last;
char iface[IFNAMSIZ];
int ret;
if (tb[IPSET_ATTR_LINENO])
......@@ -314,18 +225,7 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
if (e.cidr > HOST_MASK)
return -IPSET_ERR_INVALID_CIDR;
}
strcpy(iface, nla_data(tb[IPSET_ATTR_IFACE]));
e.iface = iface;
ret = iface_test(&h->rbtree, &e.iface);
if (adt == IPSET_ADD) {
if (!ret) {
ret = iface_add(&h->rbtree, &e.iface);
if (ret)
return ret;
}
} else if (!ret)
return ret;
nla_strlcpy(e.iface, tb[IPSET_ATTR_IFACE], IFNAMSIZ);
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
......@@ -384,7 +284,7 @@ struct hash_netiface6_elem {
u8 cidr;
u8 nomatch;
u8 elem;
const char *iface;
char iface[IFNAMSIZ];
};
/* Common functions */
......@@ -398,7 +298,7 @@ hash_netiface6_data_equal(const struct hash_netiface6_elem *ip1,
ip1->cidr == ip2->cidr &&
(++*multi) &&
ip1->physdev == ip2->physdev &&
ip1->iface == ip2->iface;
strcmp(ip1->iface, ip2->iface) == 0;
}
static inline int
......@@ -473,7 +373,6 @@ hash_netiface6_kadt(struct ip_set *set, const struct sk_buff *skb,
.elem = 1,
};
struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
int ret;
if (e.cidr == 0)
return -EINVAL;
......@@ -485,29 +384,19 @@ hash_netiface6_kadt(struct ip_set *set, const struct sk_buff *skb,
if (opt->cmdflags & IPSET_FLAG_PHYSDEV) {
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
e.iface = SRCDIR ? get_physindev_name(skb) :
get_phyoutdev_name(skb);
if (!e.iface)
const char *eiface = SRCDIR ? get_physindev_name(skb) :
get_phyoutdev_name(skb);
if (!eiface)
return -EINVAL;
STRLCPY(e.iface, eiface);
e.physdev = 1;
#else
e.iface = NULL;
#endif
} else
e.iface = SRCDIR ? IFACE(in) : IFACE(out);
STRLCPY(e.iface, SRCDIR ? IFACE(in) : IFACE(out));
if (!e.iface)
if (strlen(e.iface) == 0)
return -EINVAL;
ret = iface_test(&h->rbtree, &e.iface);
if (adt == IPSET_ADD) {
if (!ret) {
ret = iface_add(&h->rbtree, &e.iface);
if (ret)
return ret;
}
} else if (!ret)
return ret;
return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
}
......@@ -516,11 +405,9 @@ static int
hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[],
enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
{
struct hash_netiface *h = set->data;
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netiface6_elem e = { .cidr = HOST_MASK, .elem = 1 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
char iface[IFNAMSIZ];
int ret;
if (tb[IPSET_ATTR_LINENO])
......@@ -549,17 +436,7 @@ hash_netiface6_uadt(struct ip_set *set, struct nlattr *tb[],
ip6_netmask(&e.ip, e.cidr);
strcpy(iface, nla_data(tb[IPSET_ATTR_IFACE]));
e.iface = iface;
ret = iface_test(&h->rbtree, &e.iface);
if (adt == IPSET_ADD) {
if (!ret) {
ret = iface_add(&h->rbtree, &e.iface);
if (ret)
return ret;
}
} else if (!ret)
return ret;
nla_strlcpy(e.iface, tb[IPSET_ATTR_IFACE], IFNAMSIZ);
if (tb[IPSET_ATTR_CADT_FLAGS]) {
u32 cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]);
......
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