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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6

Browse source
This commit is contained in:
David S. Miller 2009-03-26 22:45:23 -07:00
commit 01e6de64d9
33 changed files with 416 additions and 210 deletions
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23
include/linux/netfilter/x_tables.h
View file

@ -437,6 +437,29 @@ extern void xt_free_table_info(struct xt_table_info *info);
extern void xt_table_entry_swap_rcu(struct xt_table_info *old,
struct xt_table_info *new);
/*
* This helper is performance critical and must be inlined
*/
static inline unsigned long ifname_compare_aligned(const char *_a,
const char *_b,
const char *_mask)
{
const unsigned long *a = (const unsigned long *)_a;
const unsigned long *b = (const unsigned long *)_b;
const unsigned long *mask = (const unsigned long *)_mask;
unsigned long ret;
ret = (a[0] ^ b[0]) & mask[0];
if (IFNAMSIZ > sizeof(unsigned long))
ret |= (a[1] ^ b[1]) & mask[1];
if (IFNAMSIZ > 2 * sizeof(unsigned long))
ret |= (a[2] ^ b[2]) & mask[2];
if (IFNAMSIZ > 3 * sizeof(unsigned long))
ret |= (a[3] ^ b[3]) & mask[3];
BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
return ret;
}
#ifdef CONFIG_COMPAT
#include <net/compat.h>

14
include/net/netfilter/nf_conntrack.h
View file

@ -91,8 +91,7 @@ struct nf_conn_help {
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
struct nf_conn
{
struct nf_conn {
/* Usage count in here is 1 for hash table/destruct timer, 1 per skb,
plus 1 for any connection(s) we are `master' for */
struct nf_conntrack ct_general;
@ -126,7 +125,6 @@ struct nf_conn
#ifdef CONFIG_NET_NS
struct net *ct_net;
#endif
struct rcu_head rcu;
};
static inline struct nf_conn *
@ -190,9 +188,13 @@ static inline void nf_ct_put(struct nf_conn *ct)
extern int nf_ct_l3proto_try_module_get(unsigned short l3proto);
extern void nf_ct_l3proto_module_put(unsigned short l3proto);
extern struct hlist_head *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced);
extern void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced,
unsigned int size);
/*
* Allocate a hashtable of hlist_head (if nulls == 0),
* or hlist_nulls_head (if nulls == 1)
*/
extern void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int nulls);
extern void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size);
extern struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple);

2
include/net/netfilter/nf_conntrack_helper.h
View file

@ -14,6 +14,8 @@
struct module;
#define NF_CT_HELPER_NAME_LEN 16
struct nf_conntrack_helper
{
struct hlist_node hnode; /* Internal use. */

7
include/net/netfilter/nf_conntrack_l3proto.h
View file

@ -53,10 +53,17 @@ struct nf_conntrack_l3proto
int (*tuple_to_nlattr)(struct sk_buff *skb,
const struct nf_conntrack_tuple *t);
/*
* Calculate size of tuple nlattr
*/
int (*nlattr_tuple_size)(void);
int (*nlattr_to_tuple)(struct nlattr *tb[],
struct nf_conntrack_tuple *t);
const struct nla_policy *nla_policy;
size_t nla_size;
#ifdef CONFIG_SYSCTL
struct ctl_table_header *ctl_table_header;
struct ctl_path *ctl_table_path;

7
include/net/netfilter/nf_conntrack_l4proto.h
View file

@ -64,16 +64,22 @@ struct nf_conntrack_l4proto
/* convert protoinfo to nfnetink attributes */
int (*to_nlattr)(struct sk_buff *skb, struct nlattr *nla,
const struct nf_conn *ct);
/* Calculate protoinfo nlattr size */
int (*nlattr_size)(void);
/* convert nfnetlink attributes to protoinfo */
int (*from_nlattr)(struct nlattr *tb[], struct nf_conn *ct);
int (*tuple_to_nlattr)(struct sk_buff *skb,
const struct nf_conntrack_tuple *t);
/* Calculate tuple nlattr size */
int (*nlattr_tuple_size)(void);
int (*nlattr_to_tuple)(struct nlattr *tb[],
struct nf_conntrack_tuple *t);
const struct nla_policy *nla_policy;
size_t nla_size;
#ifdef CONFIG_SYSCTL
struct ctl_table_header **ctl_table_header;
struct ctl_table *ctl_table;
@ -107,6 +113,7 @@ extern int nf_ct_port_tuple_to_nlattr(struct sk_buff *skb,
const struct nf_conntrack_tuple *tuple);
extern int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[],
struct nf_conntrack_tuple *t);
extern int nf_ct_port_nlattr_tuple_size(void);
extern const struct nla_policy nf_ct_port_nla_policy[];
#ifdef CONFIG_SYSCTL

6
include/net/netfilter/nf_conntrack_tuple.h
View file

@ -12,6 +12,7 @@
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <linux/list_nulls.h>
/* A `tuple' is a structure containing the information to uniquely
identify a connection. ie. if two packets have the same tuple, they
@ -146,9 +147,8 @@ static inline void nf_ct_dump_tuple(const struct nf_conntrack_tuple *t)
((enum ip_conntrack_dir)(h)->tuple.dst.dir)
/* Connections have two entries in the hash table: one for each way */
struct nf_conntrack_tuple_hash
{
struct hlist_node hnode;
struct nf_conntrack_tuple_hash {
struct hlist_nulls_node hnnode;
struct nf_conntrack_tuple tuple;
};

1
include/net/netlink.h
View file

@ -230,6 +230,7 @@ extern int nla_validate(struct nlattr *head, int len, int maxtype,
extern int nla_parse(struct nlattr *tb[], int maxtype,
struct nlattr *head, int len,
const struct nla_policy *policy);
extern int nla_policy_len(const struct nla_policy *, int);
extern struct nlattr * nla_find(struct nlattr *head, int len, int attrtype);
extern size_t nla_strlcpy(char *dst, const struct nlattr *nla,
size_t dstsize);

5
include/net/netns/conntrack.h
View file

@ -2,6 +2,7 @@
#define __NETNS_CONNTRACK_H
#include <linux/list.h>
#include <linux/list_nulls.h>
#include <asm/atomic.h>
struct ctl_table_header;
@ -10,9 +11,9 @@ struct nf_conntrack_ecache;
struct netns_ct {
atomic_t count;
unsigned int expect_count;
struct hlist_head *hash;
struct hlist_nulls_head *hash;
struct hlist_head *expect_hash;
struct hlist_head unconfirmed;
struct hlist_nulls_head unconfirmed;
struct ip_conntrack_stat *stat;
#ifdef CONFIG_NF_CONNTRACK_EVENTS
struct nf_conntrack_ecache *ecache;

27
lib/nlattr.c
View file

@ -132,6 +132,32 @@ errout:
return err;
}
/**
* nla_policy_len - Determin the max. length of a policy
* @policy: policy to use
* @n: number of policies
*
* Determines the max. length of the policy. It is currently used
* to allocated Netlink buffers roughly the size of the actual
* message.
*
* Returns 0 on success or a negative error code.
*/
int
nla_policy_len(const struct nla_policy *p, int n)
{
int i, len = 0;
for (i = 0; i < n; i++) {
if (p->len)
len += nla_total_size(p->len);
else if (nla_attr_minlen[p->type])
len += nla_total_size(nla_attr_minlen[p->type]);
}
return len;
}
/**
* nla_parse - Parse a stream of attributes into a tb buffer
* @tb: destination array with maxtype+1 elements
@ -467,6 +493,7 @@ EXPORT_SYMBOL(nla_append);
#endif
EXPORT_SYMBOL(nla_validate);
EXPORT_SYMBOL(nla_policy_len);
EXPORT_SYMBOL(nla_parse);
EXPORT_SYMBOL(nla_find);
EXPORT_SYMBOL(nla_strlcpy);

18
net/ipv4/netfilter/arp_tables.c
View file

@ -81,19 +81,7 @@ static inline int arp_devaddr_compare(const struct arpt_devaddr_info *ap,
static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
{
#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
const unsigned long *a = (const unsigned long *)_a;
const unsigned long *b = (const unsigned long *)_b;
const unsigned long *mask = (const unsigned long *)_mask;
unsigned long ret;
ret = (a[0] ^ b[0]) & mask[0];
if (IFNAMSIZ > sizeof(unsigned long))
ret |= (a[1] ^ b[1]) & mask[1];
if (IFNAMSIZ > 2 * sizeof(unsigned long))
ret |= (a[2] ^ b[2]) & mask[2];
if (IFNAMSIZ > 3 * sizeof(unsigned long))
ret |= (a[3] ^ b[3]) & mask[3];
BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
unsigned long ret = ifname_compare_aligned(_a, _b, _mask);
#else
unsigned long ret = 0;
const u16 *a = (const u16 *)_a;
@ -404,7 +392,9 @@ static int mark_source_chains(struct xt_table_info *newinfo,
&& unconditional(&e->arp)) || visited) {
unsigned int oldpos, size;
if (t->verdict < -NF_MAX_VERDICT - 1) {
if ((strcmp(t->target.u.user.name,
ARPT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
t->verdict);

27
net/ipv4/netfilter/ip_tables.c
View file

@ -74,25 +74,6 @@ do { \
Hence the start of any table is given by get_table() below. */
static unsigned long ifname_compare(const char *_a, const char *_b,
const unsigned char *_mask)
{
const unsigned long *a = (const unsigned long *)_a;
const unsigned long *b = (const unsigned long *)_b;
const unsigned long *mask = (const unsigned long *)_mask;
unsigned long ret;
ret = (a[0] ^ b[0]) & mask[0];
if (IFNAMSIZ > sizeof(unsigned long))
ret |= (a[1] ^ b[1]) & mask[1];
if (IFNAMSIZ > 2 * sizeof(unsigned long))
ret |= (a[2] ^ b[2]) & mask[2];
if (IFNAMSIZ > 3 * sizeof(unsigned long))
ret |= (a[3] ^ b[3]) & mask[3];
BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
return ret;
}
/* Returns whether matches rule or not. */
/* Performance critical - called for every packet */
static inline bool
@ -121,7 +102,7 @@ ip_packet_match(const struct iphdr *ip,
return false;
}
ret = ifname_compare(indev, ipinfo->iniface, ipinfo->iniface_mask);
ret = ifname_compare_aligned(indev, ipinfo->iniface, ipinfo->iniface_mask);
if (FWINV(ret != 0, IPT_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
@ -130,7 +111,7 @@ ip_packet_match(const struct iphdr *ip,
return false;
}
ret = ifname_compare(outdev, ipinfo->outiface, ipinfo->outiface_mask);
ret = ifname_compare_aligned(outdev, ipinfo->outiface, ipinfo->outiface_mask);
if (FWINV(ret != 0, IPT_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
@ -507,7 +488,9 @@ mark_source_chains(struct xt_table_info *newinfo,
&& unconditional(&e->ip)) || visited) {
unsigned int oldpos, size;
if (t->verdict < -NF_MAX_VERDICT - 1) {
if ((strcmp(t->target.u.user.name,
IPT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
t->verdict);

6
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View file

@ -328,6 +328,11 @@ static int ipv4_nlattr_to_tuple(struct nlattr *tb[],
return 0;
}
static int ipv4_nlattr_tuple_size(void)
{
return nla_policy_len(ipv4_nla_policy, CTA_IP_MAX + 1);
}
#endif
static struct nf_sockopt_ops so_getorigdst = {
@ -347,6 +352,7 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = {
.get_l4proto = ipv4_get_l4proto,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = ipv4_tuple_to_nlattr,
.nlattr_tuple_size = ipv4_nlattr_tuple_size,
.nlattr_to_tuple = ipv4_nlattr_to_tuple,
.nla_policy = ipv4_nla_policy,
#endif

63
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
View file

@ -25,40 +25,42 @@ struct ct_iter_state {
unsigned int bucket;
};
static struct hlist_node *ct_get_first(struct seq_file *seq)
static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
{
struct net *net = seq_file_net(seq);
struct ct_iter_state *st = seq->private;
struct hlist_node *n;
struct hlist_nulls_node *n;
for (st->bucket = 0;
st->bucket < nf_conntrack_htable_size;
st->bucket++) {
n = rcu_dereference(net->ct.hash[st->bucket].first);
if (n)
if (!is_a_nulls(n))
return n;
}
return NULL;
}
static struct hlist_node *ct_get_next(struct seq_file *seq,
struct hlist_node *head)
static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
struct hlist_nulls_node *head)
{
struct net *net = seq_file_net(seq);
struct ct_iter_state *st = seq->private;
head = rcu_dereference(head->next);
while (head == NULL) {
if (++st->bucket >= nf_conntrack_htable_size)
return NULL;
while (is_a_nulls(head)) {
if (likely(get_nulls_value(head) == st->bucket)) {
if (++st->bucket >= nf_conntrack_htable_size)
return NULL;
}
head = rcu_dereference(net->ct.hash[st->bucket].first);
}
return head;
}
static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
struct hlist_node *head = ct_get_first(seq);
struct hlist_nulls_node *head = ct_get_first(seq);
if (head)
while (pos && (head = ct_get_next(seq, head)))
@ -87,69 +89,76 @@ static void ct_seq_stop(struct seq_file *s, void *v)
static int ct_seq_show(struct seq_file *s, void *v)
{
const struct nf_conntrack_tuple_hash *hash = v;
const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
struct nf_conntrack_tuple_hash *hash = v;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
const struct nf_conntrack_l3proto *l3proto;
const struct nf_conntrack_l4proto *l4proto;
int ret = 0;
NF_CT_ASSERT(ct);
if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
return 0;
/* we only want to print DIR_ORIGINAL */
if (NF_CT_DIRECTION(hash))
return 0;
goto release;
if (nf_ct_l3num(ct) != AF_INET)
return 0;
goto release;
l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
NF_CT_ASSERT(l3proto);
l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
NF_CT_ASSERT(l4proto);
ret = -ENOSPC;
if (seq_printf(s, "%-8s %u %ld ",
l4proto->name, nf_ct_protonum(ct),
timer_pending(&ct->timeout)
? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
return -ENOSPC;
goto release;
if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
return -ENOSPC;
goto release;
if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
l3proto, l4proto))
return -ENOSPC;
goto release;
if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
return -ENOSPC;
goto release;
if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
if (seq_printf(s, "[UNREPLIED] "))
return -ENOSPC;
goto release;
if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
l3proto, l4proto))
return -ENOSPC;
goto release;
if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
return -ENOSPC;
goto release;
if (test_bit(IPS_ASSURED_BIT, &ct->status))
if (seq_printf(s, "[ASSURED] "))
return -ENOSPC;
goto release;
#ifdef CONFIG_NF_CONNTRACK_MARK
if (seq_printf(s, "mark=%u ", ct->mark))
return -ENOSPC;
goto release;
#endif
#ifdef CONFIG_NF_CONNTRACK_SECMARK
if (seq_printf(s, "secmark=%u ", ct->secmark))
return -ENOSPC;
goto release;
#endif
if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
return -ENOSPC;
return 0;
goto release;
ret = 0;
release:
nf_ct_put(ct);
return ret;
}
static const struct seq_operations ct_seq_ops = {

6
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
View file

@ -262,6 +262,11 @@ static int icmp_nlattr_to_tuple(struct nlattr *tb[],
return 0;
}
static int icmp_nlattr_tuple_size(void)
{
return nla_policy_len(icmp_nla_policy, CTA_PROTO_MAX + 1);
}
#endif
#ifdef CONFIG_SYSCTL
@ -309,6 +314,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp __read_mostly =
.me = NULL,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = icmp_tuple_to_nlattr,
.nlattr_tuple_size = icmp_nlattr_tuple_size,
.nlattr_to_tuple = icmp_nlattr_to_tuple,
.nla_policy = icmp_nla_policy,
#endif

2
net/ipv4/netfilter/nf_nat_core.c
View file

@ -679,7 +679,7 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
static int __net_init nf_nat_net_init(struct net *net)
{
net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&nf_nat_htable_size,
&net->ipv4.nat_vmalloced);
&net->ipv4.nat_vmalloced, 0);
if (!net->ipv4.nat_bysource)
return -ENOMEM;
return 0;

27
net/ipv6/netfilter/ip6_tables.c
View file

@ -89,25 +89,6 @@ ip6t_ext_hdr(u8 nexthdr)
(nexthdr == IPPROTO_DSTOPTS) );
}
static unsigned long ifname_compare(const char *_a, const char *_b,
const unsigned char *_mask)
{
const unsigned long *a = (const unsigned long *)_a;
const unsigned long *b = (const unsigned long *)_b;
const unsigned long *mask = (const unsigned long *)_mask;
unsigned long ret;
ret = (a[0] ^ b[0]) & mask[0];
if (IFNAMSIZ > sizeof(unsigned long))
ret |= (a[1] ^ b[1]) & mask[1];
if (IFNAMSIZ > 2 * sizeof(unsigned long))
ret |= (a[2] ^ b[2]) & mask[2];
if (IFNAMSIZ > 3 * sizeof(unsigned long))
ret |= (a[3] ^ b[3]) & mask[3];
BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
return ret;
}
/* Returns whether matches rule or not. */
/* Performance critical - called for every packet */
static inline bool
@ -138,7 +119,7 @@ ip6_packet_match(const struct sk_buff *skb,
return false;
}
ret = ifname_compare(indev, ip6info->iniface, ip6info->iniface_mask);
ret = ifname_compare_aligned(indev, ip6info->iniface, ip6info->iniface_mask);
if (FWINV(ret != 0, IP6T_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
@ -147,7 +128,7 @@ ip6_packet_match(const struct sk_buff *skb,
return false;
}
ret = ifname_compare(outdev, ip6info->outiface, ip6info->outiface_mask);
ret = ifname_compare_aligned(outdev, ip6info->outiface, ip6info->outiface_mask);
if (FWINV(ret != 0, IP6T_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
@ -536,7 +517,9 @@ mark_source_chains(struct xt_table_info *newinfo,
&& unconditional(&e->ipv6)) || visited) {
unsigned int oldpos, size;
if (t->verdict < -NF_MAX_VERDICT - 1) {
if ((strcmp(t->target.u.user.name,
IP6T_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1) {
duprintf("mark_source_chains: bad "
"negative verdict (%i)\n",
t->verdict);

6
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View file

@ -342,6 +342,11 @@ static int ipv6_nlattr_to_tuple(struct nlattr *tb[],
return 0;
}
static int ipv6_nlattr_tuple_size(void)
{
return nla_policy_len(ipv6_nla_policy, CTA_IP_MAX + 1);
}
#endif
struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 __read_mostly = {
@ -353,6 +358,7 @@ struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 __read_mostly = {
.get_l4proto = ipv6_get_l4proto,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = ipv6_tuple_to_nlattr,
.nlattr_tuple_size = ipv6_nlattr_tuple_size,
.nlattr_to_tuple = ipv6_nlattr_to_tuple,
.nla_policy = ipv6_nla_policy,
#endif

6
net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
View file

@ -269,6 +269,11 @@ static int icmpv6_nlattr_to_tuple(struct nlattr *tb[],
return 0;
}
static int icmpv6_nlattr_tuple_size(void)
{
return nla_policy_len(icmpv6_nla_policy, CTA_PROTO_MAX + 1);
}
#endif
#ifdef CONFIG_SYSCTL
@ -300,6 +305,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6 __read_mostly =
.error = icmpv6_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = icmpv6_tuple_to_nlattr,
.nlattr_tuple_size = icmpv6_nlattr_tuple_size,
.nlattr_to_tuple = icmpv6_nlattr_to_tuple,
.nla_policy = icmpv6_nla_policy,
#endif

2
net/netfilter/Kconfig
View file

@ -374,7 +374,7 @@ config NETFILTER_XT_TARGET_HL
config NETFILTER_XT_TARGET_LED
tristate '"LED" target support'
depends on LEDS_CLASS
depends on LEDS_CLASS && LED_TRIGGERS
depends on NETFILTER_ADVANCED
help
This option adds a `LED' target, which allows you to blink LEDs in

129
net/netfilter/nf_conntrack_core.c
View file

@ -29,6 +29,7 @@
#include <linux/netdevice.h>
#include <linux/socket.h>
#include <linux/mm.h>
#include <linux/rculist_nulls.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
@ -163,8 +164,8 @@ static void
clean_from_lists(struct nf_conn *ct)
{
pr_debug("clean_from_lists(%p)\n", ct);
hlist_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode);
hlist_del_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnode);
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode);
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnnode);
/* Destroy all pending expectations */
nf_ct_remove_expectations(ct);
@ -204,8 +205,8 @@ destroy_conntrack(struct nf_conntrack *nfct)
/* We overload first tuple to link into unconfirmed list. */
if (!nf_ct_is_confirmed(ct)) {
BUG_ON(hlist_unhashed(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode));
hlist_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode);
BUG_ON(hlist_nulls_unhashed(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode));
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode);
}
NF_CT_STAT_INC(net, delete);
@ -242,18 +243,26 @@ static void death_by_timeout(unsigned long ul_conntrack)
nf_ct_put(ct);
}
/*
* Warning :
* - Caller must take a reference on returned object
* and recheck nf_ct_tuple_equal(tuple, &h->tuple)
* OR
* - Caller must lock nf_conntrack_lock before calling this function
*/
struct nf_conntrack_tuple_hash *
__nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_tuple_hash *h;
struct hlist_node *n;
struct hlist_nulls_node *n;
unsigned int hash = hash_conntrack(tuple);
/* Disable BHs the entire time since we normally need to disable them
* at least once for the stats anyway.
*/
local_bh_disable();
hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnode) {
begin:
hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
if (nf_ct_tuple_equal(tuple, &h->tuple)) {
NF_CT_STAT_INC(net, found);
local_bh_enable();
@ -261,6 +270,13 @@ __nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple)
}
NF_CT_STAT_INC(net, searched);
}
/*
* if the nulls value we got at the end of this lookup is
* not the expected one, we must restart lookup.
* We probably met an item that was moved to another chain.
*/
if (get_nulls_value(n) != hash)
goto begin;
local_bh_enable();
return NULL;
@ -275,11 +291,18 @@ nf_conntrack_find_get(struct net *net, const struct nf_conntrack_tuple *tuple)
struct nf_conn *ct;
rcu_read_lock();
begin:
h = __nf_conntrack_find(net, tuple);
if (h) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
h = NULL;
else {
if (unlikely(!nf_ct_tuple_equal(tuple, &h->tuple))) {
nf_ct_put(ct);
goto begin;
}
}
}
rcu_read_unlock();
@ -293,9 +316,9 @@ static void __nf_conntrack_hash_insert(struct nf_conn *ct,
{
struct net *net = nf_ct_net(ct);
hlist_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode,
hlist_nulls_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode,
&net->ct.hash[hash]);
hlist_add_head_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnode,
hlist_nulls_add_head_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnnode,
&net->ct.hash[repl_hash]);
}
@ -318,7 +341,7 @@ __nf_conntrack_confirm(struct sk_buff *skb)
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
struct nf_conn_help *help;
struct hlist_node *n;
struct hlist_nulls_node *n;
enum ip_conntrack_info ctinfo;
struct net *net;
@ -350,17 +373,17 @@ __nf_conntrack_confirm(struct sk_buff *skb)
/* See if there's one in the list already, including reverse:
NAT could have grabbed it without realizing, since we're
not in the hash. If there is, we lost race. */
hlist_for_each_entry(h, n, &net->ct.hash[hash], hnode)
hlist_nulls_for_each_entry(h, n, &net->ct.hash[hash], hnnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
&h->tuple))
goto out;
hlist_for_each_entry(h, n, &net->ct.hash[repl_hash], hnode)
hlist_nulls_for_each_entry(h, n, &net->ct.hash[repl_hash], hnnode)
if (nf_ct_tuple_equal(&ct->tuplehash[IP_CT_DIR_REPLY].tuple,
&h->tuple))
goto out;
/* Remove from unconfirmed list */
hlist_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode);
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode);
__nf_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
@ -399,14 +422,14 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
{
struct net *net = nf_ct_net(ignored_conntrack);
struct nf_conntrack_tuple_hash *h;
struct hlist_node *n;
struct hlist_nulls_node *n;
unsigned int hash = hash_conntrack(tuple);
/* Disable BHs the entire time since we need to disable them at
* least once for the stats anyway.
*/
rcu_read_lock_bh();
hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnode) {
hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash], hnnode) {
if (nf_ct_tuplehash_to_ctrack(h) != ignored_conntrack &&
nf_ct_tuple_equal(tuple, &h->tuple)) {
NF_CT_STAT_INC(net, found);
@ -430,14 +453,14 @@ static noinline int early_drop(struct net *net, unsigned int hash)
/* Use oldest entry, which is roughly LRU */
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct = NULL, *tmp;
struct hlist_node *n;
struct hlist_nulls_node *n;
unsigned int i, cnt = 0;
int dropped = 0;
rcu_read_lock();
for (i = 0; i < nf_conntrack_htable_size; i++) {
hlist_for_each_entry_rcu(h, n, &net->ct.hash[hash],
hnode) {
hlist_nulls_for_each_entry_rcu(h, n, &net->ct.hash[hash],
hnnode) {
tmp = nf_ct_tuplehash_to_ctrack(h);
if (!test_bit(IPS_ASSURED_BIT, &tmp->status))
ct = tmp;
@ -508,27 +531,19 @@ struct nf_conn *nf_conntrack_alloc(struct net *net,
#ifdef CONFIG_NET_NS
ct->ct_net = net;
#endif
INIT_RCU_HEAD(&ct->rcu);
return ct;
}
EXPORT_SYMBOL_GPL(nf_conntrack_alloc);
static void nf_conntrack_free_rcu(struct rcu_head *head)
{
struct nf_conn *ct = container_of(head, struct nf_conn, rcu);
nf_ct_ext_free(ct);
kmem_cache_free(nf_conntrack_cachep, ct);
}
void nf_conntrack_free(struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
nf_ct_ext_destroy(ct);
atomic_dec(&net->ct.count);
call_rcu(&ct->rcu, nf_conntrack_free_rcu);
nf_ct_ext_free(ct);
kmem_cache_free(nf_conntrack_cachep, ct);
}
EXPORT_SYMBOL_GPL(nf_conntrack_free);
@ -594,7 +609,7 @@ init_conntrack(struct net *net,
}
/* Overload tuple linked list to put us in unconfirmed list. */
hlist_add_head(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnode,
hlist_nulls_add_head_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode,
&net->ct.unconfirmed);
spin_unlock_bh(&nf_conntrack_lock);
@ -906,6 +921,12 @@ int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[],
return 0;
}
EXPORT_SYMBOL_GPL(nf_ct_port_nlattr_to_tuple);
int nf_ct_port_nlattr_tuple_size(void)
{
return nla_policy_len(nf_ct_port_nla_policy, CTA_PROTO_MAX + 1);
}
EXPORT_SYMBOL_GPL(nf_ct_port_nlattr_tuple_size);
#endif
/* Used by ipt_REJECT and ip6t_REJECT. */
@ -934,17 +955,17 @@ get_next_corpse(struct net *net, int (*iter)(struct nf_conn *i, void *data),
{
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
struct hlist_node *n;
struct hlist_nulls_node *n;
spin_lock_bh(&nf_conntrack_lock);
for (; *bucket < nf_conntrack_htable_size; (*bucket)++) {
hlist_for_each_entry(h, n, &net->ct.hash[*bucket], hnode) {
hlist_nulls_for_each_entry(h, n, &net->ct.hash[*bucket], hnnode) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
goto found;
}
}
hlist_for_each_entry(h, n, &net->ct.unconfirmed, hnode) {
hlist_nulls_for_each_entry(h, n, &net->ct.unconfirmed, hnnode) {
ct = nf_ct_tuplehash_to_ctrack(h);
if (iter(ct, data))
set_bit(IPS_DYING_BIT, &ct->status);
@ -992,7 +1013,7 @@ static int kill_all(struct nf_conn *i, void *data)
return 1;
}
void nf_ct_free_hashtable(struct hlist_head *hash, int vmalloced, unsigned int size)
void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size)
{
if (vmalloced)
vfree(hash);
@ -1060,26 +1081,28 @@ void nf_conntrack_cleanup(struct net *net)
}
}
struct hlist_head *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced)
void *nf_ct_alloc_hashtable(unsigned int *sizep, int *vmalloced, int nulls)
{
struct hlist_head *hash;
unsigned int size, i;
struct hlist_nulls_head *hash;
unsigned int nr_slots, i;
size_t sz;
*vmalloced = 0;
size = *sizep = roundup(*sizep, PAGE_SIZE / sizeof(struct hlist_head));
hash = (void*)__get_free_pages(GFP_KERNEL|__GFP_NOWARN,
get_order(sizeof(struct hlist_head)
* size));
BUILD_BUG_ON(sizeof(struct hlist_nulls_head) != sizeof(struct hlist_head));
nr_slots = *sizep = roundup(*sizep, PAGE_SIZE / sizeof(struct hlist_nulls_head));
sz = nr_slots * sizeof(struct hlist_nulls_head);
hash = (void *)__get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
get_order(sz));
if (!hash) {
*vmalloced = 1;
printk(KERN_WARNING "nf_conntrack: falling back to vmalloc.\n");
hash = vmalloc(sizeof(struct hlist_head) * size);
hash = __vmalloc(sz, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
}
if (hash)
for (i = 0; i < size; i++)
INIT_HLIST_HEAD(&hash[i]);
if (hash && nulls)
for (i = 0; i < nr_slots; i++)
INIT_HLIST_NULLS_HEAD(&hash[i], i);
return hash;
}
@ -1090,7 +1113,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
int i, bucket, vmalloced, old_vmalloced;
unsigned int hashsize, old_size;
int rnd;
struct hlist_head *hash, *old_hash;
struct hlist_nulls_head *hash, *old_hash;
struct nf_conntrack_tuple_hash *h;
/* On boot, we can set this without any fancy locking. */
@ -1101,7 +1124,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
if (!hashsize)
return -EINVAL;
hash = nf_ct_alloc_hashtable(&hashsize, &vmalloced);
hash = nf_ct_alloc_hashtable(&hashsize, &vmalloced, 1);
if (!hash)
return -ENOMEM;
@ -1116,12 +1139,12 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp)
*/
spin_lock_bh(&nf_conntrack_lock);
for (i = 0; i < nf_conntrack_htable_size; i++) {
while (!hlist_empty(&init_net.ct.hash[i])) {
h = hlist_entry(init_net.ct.hash[i].first,
struct nf_conntrack_tuple_hash, hnode);
hlist_del_rcu(&h->hnode);
while (!hlist_nulls_empty(&init_net.ct.hash[i])) {
h = hlist_nulls_entry(init_net.ct.hash[i].first,
struct nf_conntrack_tuple_hash, hnnode);
hlist_nulls_del_rcu(&h->hnnode);
bucket = __hash_conntrack(&h->tuple, hashsize, rnd);
hlist_add_head(&h->hnode, &hash[bucket]);
hlist_nulls_add_head_rcu(&h->hnnode, &hash[bucket]);
}
}
old_size = nf_conntrack_htable_size;
@ -1172,7 +1195,7 @@ static int nf_conntrack_init_init_net(void)
nf_conntrack_cachep = kmem_cache_create("nf_conntrack",
sizeof(struct nf_conn),
0, 0, NULL);
0, SLAB_DESTROY_BY_RCU, NULL);
if (!nf_conntrack_cachep) {
printk(KERN_ERR "Unable to create nf_conn slab cache\n");
ret = -ENOMEM;
@ -1202,7 +1225,7 @@ static int nf_conntrack_init_net(struct net *net)
int ret;
atomic_set(&net->ct.count, 0);
INIT_HLIST_HEAD(&net->ct.unconfirmed);
INIT_HLIST_NULLS_HEAD(&net->ct.unconfirmed, 0);
net->ct.stat = alloc_percpu(struct ip_conntrack_stat);
if (!net->ct.stat) {
ret = -ENOMEM;
@ -1212,7 +1235,7 @@ static int nf_conntrack_init_net(struct net *net)
if (ret < 0)
goto err_ecache;
net->ct.hash = nf_ct_alloc_hashtable(&nf_conntrack_htable_size,
&net->ct.hash_vmalloc);
&net->ct.hash_vmalloc, 1);
if (!net->ct.hash) {
ret = -ENOMEM;
printk(KERN_ERR "Unable to create nf_conntrack_hash\n");

2
net/netfilter/nf_conntrack_expect.c
View file

@ -604,7 +604,7 @@ int nf_conntrack_expect_init(struct net *net)
net->ct.expect_count = 0;
net->ct.expect_hash = nf_ct_alloc_hashtable(&nf_ct_expect_hsize,
&net->ct.expect_vmalloc);
&net->ct.expect_vmalloc, 0);
if (net->ct.expect_hash == NULL)
goto err1;

8
net/netfilter/nf_conntrack_helper.c
View file

@ -142,6 +142,7 @@ int nf_conntrack_helper_register(struct nf_conntrack_helper *me)
BUG_ON(me->expect_policy == NULL);
BUG_ON(me->expect_class_max >= NF_CT_MAX_EXPECT_CLASSES);
BUG_ON(strlen(me->name) > NF_CT_HELPER_NAME_LEN - 1);
mutex_lock(&nf_ct_helper_mutex);
hlist_add_head_rcu(&me->hnode, &nf_ct_helper_hash[h]);
@ -158,6 +159,7 @@ static void __nf_conntrack_helper_unregister(struct nf_conntrack_helper *me,
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_expect *exp;
const struct hlist_node *n, *next;
const struct hlist_nulls_node *nn;
unsigned int i;
/* Get rid of expectations */
@ -174,10 +176,10 @@ static void __nf_conntrack_helper_unregister(struct nf_conntrack_helper *me,
}
/* Get rid of expecteds, set helpers to NULL. */
hlist_for_each_entry(h, n, &net->ct.unconfirmed, hnode)
hlist_for_each_entry(h, nn, &net->ct.unconfirmed, hnnode)
unhelp(h, me);
for (i = 0; i < nf_conntrack_htable_size; i++) {
hlist_for_each_entry(h, n, &net->ct.hash[i], hnode)
hlist_nulls_for_each_entry(h, nn, &net->ct.hash[i], hnnode)
unhelp(h, me);
}
}
@ -217,7 +219,7 @@ int nf_conntrack_helper_init(void)
nf_ct_helper_hsize = 1; /* gets rounded up to use one page */
nf_ct_helper_hash = nf_ct_alloc_hashtable(&nf_ct_helper_hsize,
&nf_ct_helper_vmalloc);
&nf_ct_helper_vmalloc, 0);
if (!nf_ct_helper_hash)
return -ENOMEM;

94
net/netfilter/nf_conntrack_netlink.c
View file

@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/rculist.h>
#include <linux/rculist_nulls.h>
#include <linux/types.h>
#include <linux/timer.h>
#include <linux/skbuff.h>
@ -404,6 +405,78 @@ nla_put_failure:
}
#ifdef CONFIG_NF_CONNTRACK_EVENTS
/*
* The general structure of a ctnetlink event is
*
* CTA_TUPLE_ORIG
* <l3/l4-proto-attributes>
* CTA_TUPLE_REPLY
* <l3/l4-proto-attributes>
* CTA_ID
* ...
* CTA_PROTOINFO
* <l4-proto-attributes>
* CTA_TUPLE_MASTER
* <l3/l4-proto-attributes>
*
* Therefore the formular is
*
* size = sizeof(headers) + sizeof(generic_nlas) + 3 * sizeof(tuple_nlas)
* + sizeof(protoinfo_nlas)
*/
static struct sk_buff *
ctnetlink_alloc_skb(const struct nf_conntrack_tuple *tuple, gfp_t gfp)
{
struct nf_conntrack_l3proto *l3proto;
struct nf_conntrack_l4proto *l4proto;
int len;
#define NLA_TYPE_SIZE(type) nla_total_size(sizeof(type))
/* proto independant part */
len = NLMSG_SPACE(sizeof(struct nfgenmsg))
+ 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
+ 3 * nla_total_size(0) /* CTA_TUPLE_IP */
+ 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
+ 3 * NLA_TYPE_SIZE(u_int8_t) /* CTA_PROTO_NUM */
+ NLA_TYPE_SIZE(u_int32_t) /* CTA_ID */
+ NLA_TYPE_SIZE(u_int32_t) /* CTA_STATUS */
#ifdef CONFIG_NF_CT_ACCT
+ 2 * nla_total_size(0) /* CTA_COUNTERS_ORIG|REPL */
+ 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_PACKETS */
+ 2 * NLA_TYPE_SIZE(uint64_t) /* CTA_COUNTERS_BYTES */
#endif
+ NLA_TYPE_SIZE(u_int32_t) /* CTA_TIMEOUT */
+ nla_total_size(0) /* CTA_PROTOINFO */
+ nla_total_size(0) /* CTA_HELP */
+ nla_total_size(NF_CT_HELPER_NAME_LEN) /* CTA_HELP_NAME */
#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ NLA_TYPE_SIZE(u_int32_t) /* CTA_SECMARK */
#endif
#ifdef CONFIG_NF_NAT_NEEDED
+ 2 * nla_total_size(0) /* CTA_NAT_SEQ_ADJ_ORIG|REPL */
+ 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_POS */
+ 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_BEFORE */
+ 2 * NLA_TYPE_SIZE(u_int32_t) /* CTA_NAT_SEQ_CORRECTION_AFTER */
#endif
#ifdef CONFIG_NF_CONNTRACK_MARK
+ NLA_TYPE_SIZE(u_int32_t) /* CTA_MARK */
#endif
;
#undef NLA_TYPE_SIZE
rcu_read_lock();
l3proto = __nf_ct_l3proto_find(tuple->src.l3num);
len += l3proto->nla_size;
l4proto = __nf_ct_l4proto_find(tuple->src.l3num, tuple->dst.protonum);
len += l4proto->nla_size;
rcu_read_unlock();
return alloc_skb(len, gfp);
}
static int ctnetlink_conntrack_event(struct notifier_block *this,
unsigned long events, void *ptr)
{
@ -437,7 +510,7 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
if (!item->report && !nfnetlink_has_listeners(group))
return NOTIFY_DONE;
skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
skb = ctnetlink_alloc_skb(tuple(ct, IP_CT_DIR_ORIGINAL), GFP_ATOMIC);
if (!skb)
return NOTIFY_DONE;
@ -536,7 +609,7 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
struct nf_conn *ct, *last;
struct nf_conntrack_tuple_hash *h;
struct hlist_node *n;
struct hlist_nulls_node *n;
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
u_int8_t l3proto = nfmsg->nfgen_family;
@ -544,27 +617,27 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
last = (struct nf_conn *)cb->args[1];
for (; cb->args[0] < nf_conntrack_htable_size; cb->args[0]++) {
restart:
hlist_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]],
hnode) {
hlist_nulls_for_each_entry_rcu(h, n, &init_net.ct.hash[cb->args[0]],
hnnode) {
if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
if (!atomic_inc_not_zero(&ct->ct_general.use))
continue;
/* Dump entries of a given L3 protocol number.
* If it is not specified, ie. l3proto == 0,
* then dump everything. */
if (l3proto && nf_ct_l3num(ct) != l3proto)
continue;
goto releasect;
if (cb->args[1]) {
if (ct != last)
continue;
goto releasect;
cb->args[1] = 0;
}
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
IPCTNL_MSG_CT_NEW,
1, ct) < 0) {
if (!atomic_inc_not_zero(&ct->ct_general.use))
continue;
cb->args[1] = (unsigned long)ct;
goto out;
}
@ -577,6 +650,8 @@ restart:
if (acct)
memset(acct, 0, sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]));
}
releasect:
nf_ct_put(ct);
}
if (cb->args[1]) {
cb->args[1] = 0;
@ -1242,13 +1317,12 @@ ctnetlink_create_conntrack(struct nlattr *cda[],
if (err < 0)
goto err2;
master_h = __nf_conntrack_find(&init_net, &master);
master_h = nf_conntrack_find_get(&init_net, &master);
if (master_h == NULL) {
err = -ENOENT;
goto err2;
}
master_ct = nf_ct_tuplehash_to_ctrack(master_h);
nf_conntrack_get(&master_ct->ct_general);
__set_bit(IPS_EXPECTED_BIT, &ct->status);
ct->master = master_ct;
}

16
net/netfilter/nf_conntrack_proto.c
View file

@ -167,6 +167,9 @@ int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
if (proto->l3proto >= AF_MAX)
return -EBUSY;
if (proto->tuple_to_nlattr && !proto->nlattr_tuple_size)
return -EINVAL;
mutex_lock(&nf_ct_proto_mutex);
if (nf_ct_l3protos[proto->l3proto] != &nf_conntrack_l3proto_generic) {
ret = -EBUSY;
@ -177,6 +180,9 @@ int nf_conntrack_l3proto_register(struct nf_conntrack_l3proto *proto)
if (ret < 0)
goto out_unlock;
if (proto->nlattr_tuple_size)
proto->nla_size = 3 * proto->nlattr_tuple_size();
rcu_assign_pointer(nf_ct_l3protos[proto->l3proto], proto);
out_unlock:
@ -263,6 +269,10 @@ int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
if (l4proto->l3proto >= PF_MAX)
return -EBUSY;
if ((l4proto->to_nlattr && !l4proto->nlattr_size)
|| (l4proto->tuple_to_nlattr && !l4proto->nlattr_tuple_size))
return -EINVAL;
mutex_lock(&nf_ct_proto_mutex);
if (!nf_ct_protos[l4proto->l3proto]) {
/* l3proto may be loaded latter. */
@ -290,6 +300,12 @@ int nf_conntrack_l4proto_register(struct nf_conntrack_l4proto *l4proto)
if (ret < 0)
goto out_unlock;
l4proto->nla_size = 0;
if (l4proto->nlattr_size)
l4proto->nla_size += l4proto->nlattr_size();
if (l4proto->nlattr_tuple_size)
l4proto->nla_size += 3 * l4proto->nlattr_tuple_size();
rcu_assign_pointer(nf_ct_protos[l4proto->l3proto][l4proto->l4proto],
l4proto);

9
net/netfilter/nf_conntrack_proto_dccp.c
View file

@ -669,6 +669,12 @@ static int nlattr_to_dccp(struct nlattr *cda[], struct nf_conn *ct)
write_unlock_bh(&dccp_lock);
return 0;
}
static int dccp_nlattr_size(void)
{
return nla_total_size(0) /* CTA_PROTOINFO_DCCP */
+ nla_policy_len(dccp_nla_policy, CTA_PROTOINFO_DCCP_MAX + 1);
}
#endif
#ifdef CONFIG_SYSCTL
@ -749,8 +755,10 @@ static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
.print_conntrack = dccp_print_conntrack,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.to_nlattr = dccp_to_nlattr,
.nlattr_size = dccp_nlattr_size,
.from_nlattr = nlattr_to_dccp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
@ -771,6 +779,7 @@ static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
.to_nlattr = dccp_to_nlattr,
.from_nlattr = nlattr_to_dccp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif

1
net/netfilter/nf_conntrack_proto_gre.c
View file

@ -293,6 +293,7 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 __read_mostly = {
.me = THIS_MODULE,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif

10
net/netfilter/nf_conntrack_proto_sctp.c
View file

@ -537,6 +537,12 @@ static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct)
return 0;
}
static int sctp_nlattr_size(void)
{
return nla_total_size(0) /* CTA_PROTOINFO_SCTP */
+ nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1);
}
#endif
#ifdef CONFIG_SYSCTL
@ -668,8 +674,10 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = {
.me = THIS_MODULE,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.to_nlattr = sctp_to_nlattr,
.nlattr_size = sctp_nlattr_size,
.from_nlattr = nlattr_to_sctp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
@ -696,8 +704,10 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = {
.me = THIS_MODULE,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.to_nlattr = sctp_to_nlattr,
.nlattr_size = sctp_nlattr_size,
.from_nlattr = nlattr_to_sctp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif

15
net/netfilter/nf_conntrack_proto_tcp.c
View file

@ -1184,6 +1184,17 @@ static int nlattr_to_tcp(struct nlattr *cda[], struct nf_conn *ct)
return 0;
}
static int tcp_nlattr_size(void)
{
return nla_total_size(0) /* CTA_PROTOINFO_TCP */
+ nla_policy_len(tcp_nla_policy, CTA_PROTOINFO_TCP_MAX + 1);
}
static int tcp_nlattr_tuple_size(void)
{
return nla_policy_len(nf_ct_port_nla_policy, CTA_PROTO_MAX + 1);
}
#endif
#ifdef CONFIG_SYSCTL
@ -1399,9 +1410,11 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly =
.error = tcp_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.to_nlattr = tcp_to_nlattr,
.nlattr_size = tcp_nlattr_size,
.from_nlattr = nlattr_to_tcp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nlattr_tuple_size = tcp_nlattr_tuple_size,
.nla_policy = nf_ct_port_nla_policy,
#endif
#ifdef CONFIG_SYSCTL
@ -1429,9 +1442,11 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6 __read_mostly =
.error = tcp_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.to_nlattr = tcp_to_nlattr,
.nlattr_size = tcp_nlattr_size,
.from_nlattr = nlattr_to_tcp,
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nlattr_tuple_size = tcp_nlattr_tuple_size,
.nla_policy = nf_ct_port_nla_policy,
#endif
#ifdef CONFIG_SYSCTL

2
net/netfilter/nf_conntrack_proto_udp.c
View file

@ -195,6 +195,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4 __read_mostly =
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nla_policy = nf_ct_port_nla_policy,
#endif
#ifdef CONFIG_SYSCTL
@ -222,6 +223,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nla_policy = nf_ct_port_nla_policy,
#endif
#ifdef CONFIG_SYSCTL

1
net/netfilter/nf_conntrack_proto_udplite.c
View file

@ -180,6 +180,7 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
.error = udplite_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
.nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif

57
net/netfilter/nf_conntrack_standalone.c
View file

@ -44,40 +44,42 @@ struct ct_iter_state {
unsigned int bucket;
};
static struct hlist_node *ct_get_first(struct seq_file *seq)
static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
{
struct net *net = seq_file_net(seq);
struct ct_iter_state *st = seq->private;
struct hlist_node *n;
struct hlist_nulls_node *n;
for (st->bucket = 0;
st->bucket < nf_conntrack_htable_size;
st->bucket++) {
n = rcu_dereference(net->ct.hash[st->bucket].first);
if (n)
if (!is_a_nulls(n))
return n;
}
return NULL;
}
static struct hlist_node *ct_get_next(struct seq_file *seq,
struct hlist_node *head)
static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
struct hlist_nulls_node *head)
{
struct net *net = seq_file_net(seq);
struct ct_iter_state *st = seq->private;
head = rcu_dereference(head->next);
while (head == NULL) {
if (++st->bucket >= nf_conntrack_htable_size)
return NULL;
while (is_a_nulls(head)) {
if (likely(get_nulls_value(head) == st->bucket)) {
if (++st->bucket >= nf_conntrack_htable_size)
return NULL;
}
head = rcu_dereference(net->ct.hash[st->bucket].first);
}
return head;
}
static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
struct hlist_node *head = ct_get_first(seq);
struct hlist_nulls_node *head = ct_get_first(seq);
if (head)
while (pos && (head = ct_get_next(seq, head)))
@ -107,67 +109,74 @@ static void ct_seq_stop(struct seq_file *s, void *v)
/* return 0 on success, 1 in case of error */
static int ct_seq_show(struct seq_file *s, void *v)
{
const struct nf_conntrack_tuple_hash *hash = v;
const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
struct nf_conntrack_tuple_hash *hash = v;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
const struct nf_conntrack_l3proto *l3proto;
const struct nf_conntrack_l4proto *l4proto;
int ret = 0;
NF_CT_ASSERT(ct);
if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
return 0;
/* we only want to print DIR_ORIGINAL */
if (NF_CT_DIRECTION(hash))
return 0;
goto release;
l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
NF_CT_ASSERT(l3proto);
l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
NF_CT_ASSERT(l4proto);
ret = -ENOSPC;
if (seq_printf(s, "%-8s %u %-8s %u %ld ",
l3proto->name, nf_ct_l3num(ct),
l4proto->name, nf_ct_protonum(ct),
timer_pending(&ct->timeout)
? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
return -ENOSPC;
goto release;
if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
return -ENOSPC;
goto release;
if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
l3proto, l4proto))
return -ENOSPC;
goto release;
if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
return -ENOSPC;
goto release;
if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
if (seq_printf(s, "[UNREPLIED] "))
return -ENOSPC;
goto release;
if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
l3proto, l4proto))
return -ENOSPC;
goto release;
if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
return -ENOSPC;
goto release;
if (test_bit(IPS_ASSURED_BIT, &ct->status))
if (seq_printf(s, "[ASSURED] "))
return -ENOSPC;
goto release;
#if defined(CONFIG_NF_CONNTRACK_MARK)
if (seq_printf(s, "mark=%u ", ct->mark))
return -ENOSPC;
goto release;
#endif
#ifdef CONFIG_NF_CONNTRACK_SECMARK
if (seq_printf(s, "secmark=%u ", ct->secmark))
return -ENOSPC;
goto release;
#endif
if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
return -ENOSPC;
goto release;
ret = 0;
release:
nf_ct_put(ct);
return 0;
}

6
net/netfilter/xt_connlimit.c
View file

@ -108,7 +108,7 @@ static int count_them(struct xt_connlimit_data *data,
const struct nf_conntrack_tuple_hash *found;
struct xt_connlimit_conn *conn;
struct xt_connlimit_conn *tmp;
const struct nf_conn *found_ct;
struct nf_conn *found_ct;
struct list_head *hash;
bool addit = true;
int matches = 0;
@ -123,7 +123,7 @@ static int count_them(struct xt_connlimit_data *data,
/* check the saved connections */
list_for_each_entry_safe(conn, tmp, hash, list) {
found = __nf_conntrack_find(&init_net, &conn->tuple);
found = nf_conntrack_find_get(&init_net, &conn->tuple);
found_ct = NULL;
if (found != NULL)
@ -151,6 +151,7 @@ static int count_them(struct xt_connlimit_data *data,
* we do not care about connections which are
* closed already -> ditch it
*/
nf_ct_put(found_ct);
list_del(&conn->list);
kfree(conn);
continue;
@ -160,6 +161,7 @@ static int count_them(struct xt_connlimit_data *data,
match->family))
/* same source network -> be counted! */
++matches;
nf_ct_put(found_ct);
}
rcu_read_unlock();

21
net/netfilter/xt_physdev.c
View file

@ -20,23 +20,6 @@ MODULE_DESCRIPTION("Xtables: Bridge physical device match");
MODULE_ALIAS("ipt_physdev");
MODULE_ALIAS("ip6t_physdev");
static unsigned long ifname_compare(const char *_a, const char *_b, const char *_mask)
{
const unsigned long *a = (const unsigned long *)_a;
const unsigned long *b = (const unsigned long *)_b;
const unsigned long *mask = (const unsigned long *)_mask;
unsigned long ret;
ret = (a[0] ^ b[0]) & mask[0];
if (IFNAMSIZ > sizeof(unsigned long))
ret |= (a[1] ^ b[1]) & mask[1];
if (IFNAMSIZ > 2 * sizeof(unsigned long))
ret |= (a[2] ^ b[2]) & mask[2];
if (IFNAMSIZ > 3 * sizeof(unsigned long))
ret |= (a[3] ^ b[3]) & mask[3];
BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
return ret;
}
static bool
physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par)
@ -85,7 +68,7 @@ physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par)
if (!(info->bitmask & XT_PHYSDEV_OP_IN))
goto match_outdev;
indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
ret = ifname_compare(indev, info->physindev, info->in_mask);
ret = ifname_compare_aligned(indev, info->physindev, info->in_mask);
if (!ret ^ !(info->invert & XT_PHYSDEV_OP_IN))
return false;
@ -95,7 +78,7 @@ match_outdev:
return true;
outdev = nf_bridge->physoutdev ?
nf_bridge->physoutdev->name : nulldevname;
ret = ifname_compare(outdev, info->physoutdev, info->out_mask);
ret = ifname_compare_aligned(outdev, info->physoutdev, info->out_mask);
return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT));
}