Skip to content

L
linux
Commit 4218b0e2 authored by David S. Miller's avatar David S. Miller
Browse files
Options

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next 

Florian Westphal says:

====================
Netfilter updates for net-next

following patch set includes netfilter updates for your *net-next* tree.

1. Replace pr_debug use with nf_log infra for debugging in sctp
   conntrack.
2. Remove pr_debug calls, they are either useless or we have better
   options in place.
3. Avoid repeated load of ct->status in some spots.
   Some bit-flags cannot change during the lifeetime of
   a connection, so no need to re-fetch those.
4. Avoid uneeded nesting of rcu_read_lock during tuple lookup.
5. Remove the CLUSTERIP target.  Marked as obsolete for years,
   and we still have WARN splats wrt. races of the out-of-band
   /proc interface installed by this target.
6. Add static key to nf_tables to avoid the retpoline mitigation
   if/else if cascade provided the cpu doesn't need the retpoline thunk.
7. add nf_tables objref calls to the retpoline mitigation workaround.
8. Split parts of nft_ct.c that do not need symbols exported by
   the conntrack modules and place them in nf_tables directly.
   This allows to avoid indirect call for 'ct status' checks.
9. Add 'destroy' commands to nf_tables.  They are identical
   to the existing 'delete' commands, but do not indicate
   an error if the referenced object (set, chain, rule...)
   did not exist, from Fernando.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 387f5f7d f80a612d
Show whitespace changes
Inline Side-by-side
Showing with 302 additions and 1062 deletions
include/net/netfilter/nf_tables_core.h
View file @ 4218b0e2
......@@ -61,6 +61,16 @@ struct nft_immediate_expr {
extern const struct nft_expr_ops nft_cmp_fast_ops;
extern const struct nft_expr_ops nft_cmp16_fast_ops;
struct nft_ct {
enum nft_ct_keys key:8;
enum ip_conntrack_dir dir:8;
u8 len;
union {
u8 dreg;
u8 sreg;
};
};
struct nft_payload {
enum nft_payload_bases base:8;
u8 offset;
......@@ -140,6 +150,8 @@ void nft_rt_get_eval(const struct nft_expr *expr,
struct nft_regs *regs, const struct nft_pktinfo *pkt);
void nft_counter_eval(const struct nft_expr *expr, struct nft_regs *regs,
const struct nft_pktinfo *pkt);
void nft_ct_get_fast_eval(const struct nft_expr *expr,
struct nft_regs *regs, const struct nft_pktinfo *pkt);
enum {
NFT_PAYLOAD_CTX_INNER_TUN = (1 << 0),
......@@ -164,4 +176,8 @@ void nft_payload_inner_eval(const struct nft_expr *expr, struct nft_regs *regs,
const struct nft_pktinfo *pkt,
struct nft_inner_tun_ctx *ctx);
void nft_objref_eval(const struct nft_expr *expr, struct nft_regs *regs,
const struct nft_pktinfo *pkt);
void nft_objref_map_eval(const struct nft_expr *expr, struct nft_regs *regs,
const struct nft_pktinfo *pkt);
#endif /* _NET_NF_TABLES_CORE_H */
include/uapi/linux/netfilter/nf_tables.h
View file @ 4218b0e2
......@@ -98,6 +98,13 @@ enum nft_verdicts {
* @NFT_MSG_GETFLOWTABLE: get flow table (enum nft_flowtable_attributes)
* @NFT_MSG_DELFLOWTABLE: delete flow table (enum nft_flowtable_attributes)
* @NFT_MSG_GETRULE_RESET: get rules and reset stateful expressions (enum nft_obj_attributes)
* @NFT_MSG_DESTROYTABLE: destroy a table (enum nft_table_attributes)
* @NFT_MSG_DESTROYCHAIN: destroy a chain (enum nft_chain_attributes)
* @NFT_MSG_DESTROYRULE: destroy a rule (enum nft_rule_attributes)
* @NFT_MSG_DESTROYSET: destroy a set (enum nft_set_attributes)
* @NFT_MSG_DESTROYSETELEM: destroy a set element (enum nft_set_elem_attributes)
* @NFT_MSG_DESTROYOBJ: destroy a stateful object (enum nft_object_attributes)
* @NFT_MSG_DESTROYFLOWTABLE: destroy flow table (enum nft_flowtable_attributes)
*/
enum nf_tables_msg_types {
NFT_MSG_NEWTABLE,
......@@ -126,6 +133,13 @@ enum nf_tables_msg_types {
NFT_MSG_GETFLOWTABLE,
NFT_MSG_DELFLOWTABLE,
NFT_MSG_GETRULE_RESET,
NFT_MSG_DESTROYTABLE,
NFT_MSG_DESTROYCHAIN,
NFT_MSG_DESTROYRULE,
NFT_MSG_DESTROYSET,
NFT_MSG_DESTROYSETELEM,
NFT_MSG_DESTROYOBJ,
NFT_MSG_DESTROYFLOWTABLE,
NFT_MSG_MAX,
};
......
net/ipv4/netfilter/Kconfig
View file @ 4218b0e2
......@@ -259,20 +259,6 @@ config IP_NF_MANGLE
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_TARGET_CLUSTERIP
tristate "CLUSTERIP target support"
depends on IP_NF_MANGLE
depends on NF_CONNTRACK
depends on NETFILTER_ADVANCED
select NF_CONNTRACK_MARK
select NETFILTER_FAMILY_ARP
help
The CLUSTERIP target allows you to build load-balancing clusters of
network servers without having a dedicated load-balancing
router/server/switch.
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_TARGET_ECN
tristate "ECN target support"
depends on IP_NF_MANGLE
......
net/ipv4/netfilter/Makefile
View file @ 4218b0e2
......@@ -39,7 +39,6 @@ obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_RPFILTER) += ipt_rpfilter.o
# targets
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
obj-$(CONFIG_IP_NF_TARGET_SYNPROXY) += ipt_SYNPROXY.o
......
net/ipv4/netfilter/ipt_CLUSTERIP.c deleted 100644 → 0
View file @ 387f5f7d
// SPDX-License-Identifier: GPL-2.0-only
/* Cluster IP hashmark target
* (C) 2003-2004 by Harald Welte <laforge@netfilter.org>
* based on ideas of Fabio Olive Leite <olive@unixforge.org>
*
* Development of this code funded by SuSE Linux AG, https://www.suse.com/
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/jhash.h>
#include <linux/bitops.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/if_arp.h>
#include <linux/seq_file.h>
#include <linux/refcount.h>
#include <linux/netfilter_arp.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_CLUSTERIP.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/checksum.h>
#include <net/ip.h>
#define CLUSTERIP_VERSION "0.8"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
MODULE_DESCRIPTION("Xtables: CLUSTERIP target");
struct clusterip_config {
struct list_head list; /* list of all configs */
refcount_t refcount; /* reference count */
refcount_t entries; /* number of entries/rules
* referencing us */
__be32 clusterip; /* the IP address */
u_int8_t clustermac[ETH_ALEN]; /* the MAC address */
int ifindex; /* device ifindex */
u_int16_t num_total_nodes; /* total number of nodes */
unsigned long local_nodes; /* node number array */
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *pde; /* proc dir entry */
#endif
enum clusterip_hashmode hash_mode; /* which hashing mode */
u_int32_t hash_initval; /* hash initialization */
struct rcu_head rcu; /* for call_rcu */
struct net *net; /* netns for pernet list */
char ifname[IFNAMSIZ]; /* device ifname */
};
#ifdef CONFIG_PROC_FS
static const struct proc_ops clusterip_proc_ops;
#endif
struct clusterip_net {
struct list_head configs;
/* lock protects the configs list */
spinlock_t lock;
bool clusterip_deprecated_warning;
#ifdef CONFIG_PROC_FS
struct proc_dir_entry *procdir;
/* mutex protects the config->pde*/
struct mutex mutex;
#endif
unsigned int hook_users;
};
static unsigned int clusterip_arp_mangle(void *priv, struct sk_buff *skb, const struct nf_hook_state *state);
static const struct nf_hook_ops cip_arp_ops = {
.hook = clusterip_arp_mangle,
.pf = NFPROTO_ARP,
.hooknum = NF_ARP_OUT,
.priority = -1
};
static unsigned int clusterip_net_id __read_mostly;
static inline struct clusterip_net *clusterip_pernet(struct net *net)
{
return net_generic(net, clusterip_net_id);
}
static inline void
clusterip_config_get(struct clusterip_config *c)
{
refcount_inc(&c->refcount);
}
static void clusterip_config_rcu_free(struct rcu_head *head)
{
struct clusterip_config *config;
struct net_device *dev;
config = container_of(head, struct clusterip_config, rcu);
dev = dev_get_by_name(config->net, config->ifname);
if (dev) {
dev_mc_del(dev, config->clustermac);
dev_put(dev);
}
kfree(config);
}
static inline void
clusterip_config_put(struct clusterip_config *c)
{
if (refcount_dec_and_test(&c->refcount))
call_rcu(&c->rcu, clusterip_config_rcu_free);
}
/* decrease the count of entries using/referencing this config. If last
* entry(rule) is removed, remove the config from lists, but don't free it
* yet, since proc-files could still be holding references */
static inline void
clusterip_config_entry_put(struct clusterip_config *c)
{
struct clusterip_net *cn = clusterip_pernet(c->net);
local_bh_disable();
if (refcount_dec_and_lock(&c->entries, &cn->lock)) {
list_del_rcu(&c->list);
spin_unlock(&cn->lock);
local_bh_enable();
/* In case anyone still accesses the file, the open/close
* functions are also incrementing the refcount on their own,
* so it's safe to remove the entry even if it's in use. */
#ifdef CONFIG_PROC_FS
mutex_lock(&cn->mutex);
if (cn->procdir)
proc_remove(c->pde);
mutex_unlock(&cn->mutex);
#endif
return;
}
local_bh_enable();
}
static struct clusterip_config *
__clusterip_config_find(struct net *net, __be32 clusterip)
{
struct clusterip_config *c;
struct clusterip_net *cn = clusterip_pernet(net);
list_for_each_entry_rcu(c, &cn->configs, list) {
if (c->clusterip == clusterip)
return c;
}
return NULL;
}
static inline struct clusterip_config *
clusterip_config_find_get(struct net *net, __be32 clusterip, int entry)
{
struct clusterip_config *c;
rcu_read_lock_bh();
c = __clusterip_config_find(net, clusterip);
if (c) {
#ifdef CONFIG_PROC_FS
if (!c->pde)
c = NULL;
else
#endif
if (unlikely(!refcount_inc_not_zero(&c->refcount)))
c = NULL;
else if (entry) {
if (unlikely(!refcount_inc_not_zero(&c->entries))) {
clusterip_config_put(c);
c = NULL;
}
}
}
rcu_read_unlock_bh();
return c;
}
static void
clusterip_config_init_nodelist(struct clusterip_config *c,
const struct ipt_clusterip_tgt_info *i)
{
int n;
for (n = 0; n < i->num_local_nodes; n++)
set_bit(i->local_nodes[n] - 1, &c->local_nodes);
}
static int
clusterip_netdev_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net *net = dev_net(dev);
struct clusterip_net *cn = clusterip_pernet(net);
struct clusterip_config *c;
spin_lock_bh(&cn->lock);
list_for_each_entry_rcu(c, &cn->configs, list) {
switch (event) {
case NETDEV_REGISTER:
if (!strcmp(dev->name, c->ifname)) {
c->ifindex = dev->ifindex;
dev_mc_add(dev, c->clustermac);
}
break;
case NETDEV_UNREGISTER:
if (dev->ifindex == c->ifindex) {
dev_mc_del(dev, c->clustermac);
c->ifindex = -1;
}
break;
case NETDEV_CHANGENAME:
if (!strcmp(dev->name, c->ifname)) {
c->ifindex = dev->ifindex;
dev_mc_add(dev, c->clustermac);
} else if (dev->ifindex == c->ifindex) {
dev_mc_del(dev, c->clustermac);
c->ifindex = -1;
}
break;
}
}
spin_unlock_bh(&cn->lock);
return NOTIFY_DONE;
}
static struct clusterip_config *
clusterip_config_init(struct net *net, const struct ipt_clusterip_tgt_info *i,
__be32 ip, const char *iniface)
{
struct clusterip_net *cn = clusterip_pernet(net);
struct clusterip_config *c;
struct net_device *dev;
int err;
if (iniface[0] == '\0') {
pr_info("Please specify an interface name\n");
return ERR_PTR(-EINVAL);
}
c = kzalloc(sizeof(*c), GFP_ATOMIC);
if (!c)
return ERR_PTR(-ENOMEM);
dev = dev_get_by_name(net, iniface);
if (!dev) {
pr_info("no such interface %s\n", iniface);
kfree(c);
return ERR_PTR(-ENOENT);
}
c->ifindex = dev->ifindex;
strcpy(c->ifname, dev->name);
memcpy(&c->clustermac, &i->clustermac, ETH_ALEN);
dev_mc_add(dev, c->clustermac);
dev_put(dev);
c->clusterip = ip;
c->num_total_nodes = i->num_total_nodes;
clusterip_config_init_nodelist(c, i);
c->hash_mode = i->hash_mode;
c->hash_initval = i->hash_initval;
c->net = net;
refcount_set(&c->refcount, 1);
spin_lock_bh(&cn->lock);
if (__clusterip_config_find(net, ip)) {
err = -EBUSY;
goto out_config_put;
}
list_add_rcu(&c->list, &cn->configs);
spin_unlock_bh(&cn->lock);
#ifdef CONFIG_PROC_FS
{
char buffer[16];
/* create proc dir entry */
sprintf(buffer, "%pI4", &ip);
mutex_lock(&cn->mutex);
c->pde = proc_create_data(buffer, 0600,
cn->procdir,
&clusterip_proc_ops, c);
mutex_unlock(&cn->mutex);
if (!c->pde) {
err = -ENOMEM;
goto err;
}
}
#endif
refcount_set(&c->entries, 1);
return c;
#ifdef CONFIG_PROC_FS
err:
#endif
spin_lock_bh(&cn->lock);
list_del_rcu(&c->list);
out_config_put:
spin_unlock_bh(&cn->lock);
clusterip_config_put(c);
return ERR_PTR(err);
}
#ifdef CONFIG_PROC_FS
static int
clusterip_add_node(struct clusterip_config *c, u_int16_t nodenum)
{
if (nodenum == 0 ||
nodenum > c->num_total_nodes)
return 1;
/* check if we already have this number in our bitfield */
if (test_and_set_bit(nodenum - 1, &c->local_nodes))
return 1;
return 0;
}
static bool
clusterip_del_node(struct clusterip_config *c, u_int16_t nodenum)
{
if (nodenum == 0 ||
nodenum > c->num_total_nodes)
return true;
if (test_and_clear_bit(nodenum - 1, &c->local_nodes))
return false;
return true;
}
#endif
static inline u_int32_t
clusterip_hashfn(const struct sk_buff *skb,
const struct clusterip_config *config)
{
const struct iphdr *iph = ip_hdr(skb);
unsigned long hashval;
u_int16_t sport = 0, dport = 0;
int poff;
poff = proto_ports_offset(iph->protocol);
if (poff >= 0) {
const u_int16_t *ports;
u16 _ports[2];
ports = skb_header_pointer(skb, iph->ihl * 4 + poff, 4, _ports);
if (ports) {
sport = ports[0];
dport = ports[1];
}
} else {
net_info_ratelimited("unknown protocol %u\n", iph->protocol);
}
switch (config->hash_mode) {
case CLUSTERIP_HASHMODE_SIP:
hashval = jhash_1word(ntohl(iph->saddr),
config->hash_initval);
break;
case CLUSTERIP_HASHMODE_SIP_SPT:
hashval = jhash_2words(ntohl(iph->saddr), sport,
config->hash_initval);
break;
case CLUSTERIP_HASHMODE_SIP_SPT_DPT:
hashval = jhash_3words(ntohl(iph->saddr), sport, dport,
config->hash_initval);
break;
default:
/* to make gcc happy */
hashval = 0;
/* This cannot happen, unless the check function wasn't called
* at rule load time */
pr_info("unknown mode %u\n", config->hash_mode);
BUG();
break;
}
/* node numbers are 1..n, not 0..n */
return reciprocal_scale(hashval, config->num_total_nodes) + 1;
}
static inline int
clusterip_responsible(const struct clusterip_config *config, u_int32_t hash)
{
return test_bit(hash - 1, &config->local_nodes);
}
/***********************************************************************
* IPTABLES TARGET
***********************************************************************/
static unsigned int
clusterip_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct ipt_clusterip_tgt_info *cipinfo = par->targinfo;
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
u_int32_t hash;
/* don't need to clusterip_config_get() here, since refcount
* is only decremented by destroy() - and ip_tables guarantees
* that the ->target() function isn't called after ->destroy() */
ct = nf_ct_get(skb, &ctinfo);
if (ct == NULL)
return NF_DROP;
/* special case: ICMP error handling. conntrack distinguishes between
* error messages (RELATED) and information requests (see below) */
if (ip_hdr(skb)->protocol == IPPROTO_ICMP &&
(ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY))
return XT_CONTINUE;
/* nf_conntrack_proto_icmp guarantees us that we only have ICMP_ECHO,
* TIMESTAMP, INFO_REQUEST or ICMP_ADDRESS type icmp packets from here
* on, which all have an ID field [relevant for hashing]. */
hash = clusterip_hashfn(skb, cipinfo->config);
switch (ctinfo) {
case IP_CT_NEW:
WRITE_ONCE(ct->mark, hash);
break;
case IP_CT_RELATED:
case IP_CT_RELATED_REPLY:
/* FIXME: we don't handle expectations at the moment.
* They can arrive on a different node than
* the master connection (e.g. FTP passive mode) */
case IP_CT_ESTABLISHED:
case IP_CT_ESTABLISHED_REPLY:
break;
default: /* Prevent gcc warnings */
break;
}
#ifdef DEBUG
nf_ct_dump_tuple_ip(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
#endif
pr_debug("hash=%u ct_hash=%u ", hash, READ_ONCE(ct->mark));
if (!clusterip_responsible(cipinfo->config, hash)) {
pr_debug("not responsible\n");
return NF_DROP;
}
pr_debug("responsible\n");
/* despite being received via linklayer multicast, this is
* actually a unicast IP packet. TCP doesn't like PACKET_MULTICAST */
skb->pkt_type = PACKET_HOST;
return XT_CONTINUE;
}
static int clusterip_tg_check(const struct xt_tgchk_param *par)
{
struct ipt_clusterip_tgt_info *cipinfo = par->targinfo;
struct clusterip_net *cn = clusterip_pernet(par->net);
const struct ipt_entry *e = par->entryinfo;
struct clusterip_config *config;
int ret, i;
if (par->nft_compat) {
pr_err("cannot use CLUSTERIP target from nftables compat\n");
return -EOPNOTSUPP;
}
if (cn->hook_users == UINT_MAX)
return -EOVERFLOW;
if (cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP &&
cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP_SPT &&
cipinfo->hash_mode != CLUSTERIP_HASHMODE_SIP_SPT_DPT) {
pr_info("unknown mode %u\n", cipinfo->hash_mode);
return -EINVAL;
}
if (e->ip.dmsk.s_addr != htonl(0xffffffff) ||
e->ip.dst.s_addr == 0) {
pr_info("Please specify destination IP\n");
return -EINVAL;
}
if (cipinfo->num_local_nodes > ARRAY_SIZE(cipinfo->local_nodes)) {
pr_info("bad num_local_nodes %u\n", cipinfo->num_local_nodes);
return -EINVAL;
}
for (i = 0; i < cipinfo->num_local_nodes; i++) {
if (cipinfo->local_nodes[i] - 1 >=
sizeof(config->local_nodes) * 8) {
pr_info("bad local_nodes[%d] %u\n",
i, cipinfo->local_nodes[i]);
return -EINVAL;
}
}
config = clusterip_config_find_get(par->net, e->ip.dst.s_addr, 1);
if (!config) {
if (!(cipinfo->flags & CLUSTERIP_FLAG_NEW)) {
pr_info("no config found for %pI4, need 'new'\n",
&e->ip.dst.s_addr);
return -EINVAL;
} else {
config = clusterip_config_init(par->net, cipinfo,
e->ip.dst.s_addr,
e->ip.iniface);
if (IS_ERR(config))
return PTR_ERR(config);
}
} else if (memcmp(&config->clustermac, &cipinfo->clustermac, ETH_ALEN)) {
clusterip_config_entry_put(config);
clusterip_config_put(config);
return -EINVAL;
}
ret = nf_ct_netns_get(par->net, par->family);
if (ret < 0) {
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
clusterip_config_entry_put(config);
clusterip_config_put(config);
return ret;
}
if (cn->hook_users == 0) {
ret = nf_register_net_hook(par->net, &cip_arp_ops);
if (ret < 0) {
clusterip_config_entry_put(config);
clusterip_config_put(config);
nf_ct_netns_put(par->net, par->family);
return ret;
}
}
cn->hook_users++;
if (!cn->clusterip_deprecated_warning) {
pr_info("ipt_CLUSTERIP is deprecated and it will removed soon, "
"use xt_cluster instead\n");
cn->clusterip_deprecated_warning = true;
}
cipinfo->config = config;
return ret;
}
/* drop reference count of cluster config when rule is deleted */
static void clusterip_tg_destroy(const struct xt_tgdtor_param *par)
{
const struct ipt_clusterip_tgt_info *cipinfo = par->targinfo;
struct clusterip_net *cn = clusterip_pernet(par->net);
/* if no more entries are referencing the config, remove it
* from the list and destroy the proc entry */
clusterip_config_entry_put(cipinfo->config);
clusterip_config_put(cipinfo->config);
nf_ct_netns_put(par->net, par->family);
cn->hook_users--;
if (cn->hook_users == 0)
nf_unregister_net_hook(par->net, &cip_arp_ops);
}
#ifdef CONFIG_NETFILTER_XTABLES_COMPAT
struct compat_ipt_clusterip_tgt_info
{
u_int32_t flags;
u_int8_t clustermac[6];
u_int16_t num_total_nodes;
u_int16_t num_local_nodes;
u_int16_t local_nodes[CLUSTERIP_MAX_NODES];
u_int32_t hash_mode;
u_int32_t hash_initval;
compat_uptr_t config;
};
#endif /* CONFIG_NETFILTER_XTABLES_COMPAT */
static struct xt_target clusterip_tg_reg __read_mostly = {
.name = "CLUSTERIP",
.family = NFPROTO_IPV4,
.target = clusterip_tg,
.checkentry = clusterip_tg_check,
.destroy = clusterip_tg_destroy,
.targetsize = sizeof(struct ipt_clusterip_tgt_info),
.usersize = offsetof(struct ipt_clusterip_tgt_info, config),
#ifdef CONFIG_NETFILTER_XTABLES_COMPAT
.compatsize = sizeof(struct compat_ipt_clusterip_tgt_info),
#endif /* CONFIG_NETFILTER_XTABLES_COMPAT */
.me = THIS_MODULE
};
/***********************************************************************
* ARP MANGLING CODE
***********************************************************************/
/* hardcoded for 48bit ethernet and 32bit ipv4 addresses */
struct arp_payload {
u_int8_t src_hw[ETH_ALEN];
__be32 src_ip;
u_int8_t dst_hw[ETH_ALEN];
__be32 dst_ip;
} __packed;
#ifdef DEBUG
static void arp_print(struct arp_payload *payload)
{
#define HBUFFERLEN 30
char hbuffer[HBUFFERLEN];
int j, k;
for (k = 0, j = 0; k < HBUFFERLEN - 3 && j < ETH_ALEN; j++) {
hbuffer[k++] = hex_asc_hi(payload->src_hw[j]);
hbuffer[k++] = hex_asc_lo(payload->src_hw[j]);
hbuffer[k++] = ':';
}
hbuffer[--k] = '\0';
pr_debug("src %pI4@%s, dst %pI4\n",
&payload->src_ip, hbuffer, &payload->dst_ip);
}
#endif
static unsigned int
clusterip_arp_mangle(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct arphdr *arp = arp_hdr(skb);
struct arp_payload *payload;
struct clusterip_config *c;
struct net *net = state->net;
/* we don't care about non-ethernet and non-ipv4 ARP */
if (arp->ar_hrd != htons(ARPHRD_ETHER) ||
arp->ar_pro != htons(ETH_P_IP) ||
arp->ar_pln != 4 || arp->ar_hln != ETH_ALEN)
return NF_ACCEPT;
/* we only want to mangle arp requests and replies */
if (arp->ar_op != htons(ARPOP_REPLY) &&
arp->ar_op != htons(ARPOP_REQUEST))
return NF_ACCEPT;
payload = (void *)(arp+1);
/* if there is no clusterip configuration for the arp reply's
* source ip, we don't want to mangle it */
c = clusterip_config_find_get(net, payload->src_ip, 0);
if (!c)
return NF_ACCEPT;
/* normally the linux kernel always replies to arp queries of
* addresses on different interfacs. However, in the CLUSTERIP case
* this wouldn't work, since we didn't subscribe the mcast group on
* other interfaces */
if (c->ifindex != state->out->ifindex) {
pr_debug("not mangling arp reply on different interface: cip'%d'-skb'%d'\n",
c->ifindex, state->out->ifindex);
clusterip_config_put(c);
return NF_ACCEPT;
}
/* mangle reply hardware address */
memcpy(payload->src_hw, c->clustermac, arp->ar_hln);
#ifdef DEBUG
pr_debug("mangled arp reply: ");
arp_print(payload);
#endif
clusterip_config_put(c);
return NF_ACCEPT;
}
/***********************************************************************
* PROC DIR HANDLING
***********************************************************************/
#ifdef CONFIG_PROC_FS
struct clusterip_seq_position {
unsigned int pos; /* position */
unsigned int weight; /* number of bits set == size */
unsigned int bit; /* current bit */
unsigned long val; /* current value */
};
static void *clusterip_seq_start(struct seq_file *s, loff_t *pos)
{
struct clusterip_config *c = s->private;
unsigned int weight;
u_int32_t local_nodes;
struct clusterip_seq_position *idx;
/* FIXME: possible race */
local_nodes = c->local_nodes;
weight = hweight32(local_nodes);
if (*pos >= weight)
return NULL;
idx = kmalloc(sizeof(struct clusterip_seq_position), GFP_KERNEL);
if (!idx)
return ERR_PTR(-ENOMEM);
idx->pos = *pos;
idx->weight = weight;
idx->bit = ffs(local_nodes);
idx->val = local_nodes;
clear_bit(idx->bit - 1, &idx->val);
return idx;
}
static void *clusterip_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
struct clusterip_seq_position *idx = v;
*pos = ++idx->pos;
if (*pos >= idx->weight) {
kfree(v);
return NULL;
}
idx->bit = ffs(idx->val);
clear_bit(idx->bit - 1, &idx->val);
return idx;
}
static void clusterip_seq_stop(struct seq_file *s, void *v)
{
if (!IS_ERR(v))
kfree(v);
}
static int clusterip_seq_show(struct seq_file *s, void *v)
{
struct clusterip_seq_position *idx = v;
if (idx->pos != 0)
seq_putc(s, ',');
seq_printf(s, "%u", idx->bit);
if (idx->pos == idx->weight - 1)
seq_putc(s, '\n');
return 0;
}
static const struct seq_operations clusterip_seq_ops = {
.start = clusterip_seq_start,
.next = clusterip_seq_next,
.stop = clusterip_seq_stop,
.show = clusterip_seq_show,
};
static int clusterip_proc_open(struct inode *inode, struct file *file)
{
int ret = seq_open(file, &clusterip_seq_ops);
if (!ret) {
struct seq_file *sf = file->private_data;
struct clusterip_config *c = pde_data(inode);
sf->private = c;
clusterip_config_get(c);
}
return ret;
}
static int clusterip_proc_release(struct inode *inode, struct file *file)
{
struct clusterip_config *c = pde_data(inode);
int ret;
ret = seq_release(inode, file);
if (!ret)
clusterip_config_put(c);
return ret;
}
static ssize_t clusterip_proc_write(struct file *file, const char __user *input,
size_t size, loff_t *ofs)
{
struct clusterip_config *c = pde_data(file_inode(file));
#define PROC_WRITELEN 10
char buffer[PROC_WRITELEN+1];
unsigned long nodenum;
int rc;
if (size > PROC_WRITELEN)
return -EIO;
if (copy_from_user(buffer, input, size))
return -EFAULT;
buffer[size] = 0;
if (*buffer == '+') {
rc = kstrtoul(buffer+1, 10, &nodenum);
if (rc)
return rc;
if (clusterip_add_node(c, nodenum))
return -ENOMEM;
} else if (*buffer == '-') {
rc = kstrtoul(buffer+1, 10, &nodenum);
if (rc)
return rc;
if (clusterip_del_node(c, nodenum))
return -ENOENT;
} else
return -EIO;
return size;
}
static const struct proc_ops clusterip_proc_ops = {
.proc_open = clusterip_proc_open,
.proc_read = seq_read,
.proc_write = clusterip_proc_write,
.proc_lseek = seq_lseek,
.proc_release = clusterip_proc_release,
};
#endif /* CONFIG_PROC_FS */
static int clusterip_net_init(struct net *net)
{
struct clusterip_net *cn = clusterip_pernet(net);
INIT_LIST_HEAD(&cn->configs);
spin_lock_init(&cn->lock);
#ifdef CONFIG_PROC_FS
cn->procdir = proc_mkdir("ipt_CLUSTERIP", net->proc_net);
if (!cn->procdir) {
pr_err("Unable to proc dir entry\n");
return -ENOMEM;
}
mutex_init(&cn->mutex);
#endif /* CONFIG_PROC_FS */
return 0;
}
static void clusterip_net_exit(struct net *net)
{
#ifdef CONFIG_PROC_FS
struct clusterip_net *cn = clusterip_pernet(net);
mutex_lock(&cn->mutex);
proc_remove(cn->procdir);
cn->procdir = NULL;
mutex_unlock(&cn->mutex);
#endif
}
static struct pernet_operations clusterip_net_ops = {
.init = clusterip_net_init,
.exit = clusterip_net_exit,
.id = &clusterip_net_id,
.size = sizeof(struct clusterip_net),
};
static struct notifier_block cip_netdev_notifier = {
.notifier_call = clusterip_netdev_event
};
static int __init clusterip_tg_init(void)
{
int ret;
ret = register_pernet_subsys(&clusterip_net_ops);
if (ret < 0)
return ret;
ret = xt_register_target(&clusterip_tg_reg);
if (ret < 0)
goto cleanup_subsys;
ret = register_netdevice_notifier(&cip_netdev_notifier);
if (ret < 0)
goto unregister_target;
pr_info("ClusterIP Version %s loaded successfully\n",
CLUSTERIP_VERSION);
return 0;
unregister_target:
xt_unregister_target(&clusterip_tg_reg);
cleanup_subsys:
unregister_pernet_subsys(&clusterip_net_ops);
return ret;
}
static void __exit clusterip_tg_exit(void)
{
pr_info("ClusterIP Version %s unloading\n", CLUSTERIP_VERSION);
unregister_netdevice_notifier(&cip_netdev_notifier);
xt_unregister_target(&clusterip_tg_reg);
unregister_pernet_subsys(&clusterip_net_ops);
/* Wait for completion of call_rcu()'s (clusterip_config_rcu_free) */
rcu_barrier();
}
module_init(clusterip_tg_init);
module_exit(clusterip_tg_exit);
net/netfilter/Makefile
View file @ 4218b0e2
......@@ -98,6 +98,12 @@ nf_tables-objs += nft_set_pipapo_avx2.o
endif
endif
ifdef CONFIG_NFT_CT
ifdef CONFIG_RETPOLINE
nf_tables-objs += nft_ct_fast.o
endif
endif
obj-$(CONFIG_NF_TABLES) += nf_tables.o
obj-$(CONFIG_NFT_COMPAT) += nft_compat.o
obj-$(CONFIG_NFT_CONNLIMIT) += nft_connlimit.o
......
net/netfilter/nf_conntrack_core.c
View file @ 4218b0e2
......@@ -514,7 +514,6 @@ EXPORT_SYMBOL_GPL(nf_ct_get_id);
static void
clean_from_lists(struct nf_conn *ct)
{
pr_debug("clean_from_lists(%p)\n", ct);
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode);
hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_REPLY].hnnode);
......@@ -582,7 +581,6 @@ void nf_ct_destroy(struct nf_conntrack *nfct)
{
struct nf_conn *ct = (struct nf_conn *)nfct;
pr_debug("%s(%p)\n", __func__, ct);
WARN_ON(refcount_read(&nfct->use) != 0);
if (unlikely(nf_ct_is_template(ct))) {
......@@ -603,7 +601,6 @@ void nf_ct_destroy(struct nf_conntrack *nfct)
if (ct->master)
nf_ct_put(ct->master);
pr_debug("%s: returning ct=%p to slab\n", __func__, ct);
nf_conntrack_free(ct);
}
EXPORT_SYMBOL(nf_ct_destroy);
......@@ -786,8 +783,6 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone,
struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct;
rcu_read_lock();
h = ____nf_conntrack_find(net, zone, tuple, hash);
if (h) {
/* We have a candidate that matches the tuple we're interested
......@@ -799,7 +794,7 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone,
smp_acquire__after_ctrl_dep();
if (likely(nf_ct_key_equal(h, tuple, zone, net)))
goto found;
return h;
/* TYPESAFE_BY_RCU recycled the candidate */
nf_ct_put(ct);
......@@ -807,8 +802,6 @@ __nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone,
h = NULL;
}
found:
rcu_read_unlock();
return h;
}
......@@ -820,16 +813,21 @@ nf_conntrack_find_get(struct net *net, const struct nf_conntrack_zone *zone,
unsigned int rid, zone_id = nf_ct_zone_id(zone, IP_CT_DIR_ORIGINAL);
struct nf_conntrack_tuple_hash *thash;
rcu_read_lock();
thash = __nf_conntrack_find_get(net, zone, tuple,
hash_conntrack_raw(tuple, zone_id, net));
if (thash)
return thash;
goto out_unlock;
rid = nf_ct_zone_id(zone, IP_CT_DIR_REPLY);
if (rid != zone_id)
return __nf_conntrack_find_get(net, zone, tuple,
thash = __nf_conntrack_find_get(net, zone, tuple,
hash_conntrack_raw(tuple, rid, net));
out_unlock:
rcu_read_unlock();
return thash;
}
EXPORT_SYMBOL_GPL(nf_conntrack_find_get);
......@@ -1210,7 +1208,6 @@ __nf_conntrack_confirm(struct sk_buff *skb)
goto dying;
}
pr_debug("Confirming conntrack %p\n", ct);
/* We have to check the DYING flag after unlink to prevent
* a race against nf_ct_get_next_corpse() possibly called from
* user context, else we insert an already 'dead' hash, blocking
......@@ -1721,10 +1718,8 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
struct nf_conntrack_zone tmp;
struct nf_conntrack_net *cnet;
if (!nf_ct_invert_tuple(&repl_tuple, tuple)) {
pr_debug("Can't invert tuple.\n");
if (!nf_ct_invert_tuple(&repl_tuple, tuple))
return NULL;
}
zone = nf_ct_zone_tmpl(tmpl, skb, &tmp);
ct = __nf_conntrack_alloc(net, zone, tuple, &repl_tuple, GFP_ATOMIC,
......@@ -1764,8 +1759,6 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
spin_lock_bh(&nf_conntrack_expect_lock);
exp = nf_ct_find_expectation(net, zone, tuple);
if (exp) {
pr_debug("expectation arrives ct=%p exp=%p\n",
ct, exp);
/* Welcome, Mr. Bond. We've been expecting you... */
__set_bit(IPS_EXPECTED_BIT, &ct->status);
/* exp->master safe, refcnt bumped in nf_ct_find_expectation */
......@@ -1829,10 +1822,8 @@ resolve_normal_ct(struct nf_conn *tmpl,
if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
dataoff, state->pf, protonum, state->net,
&tuple)) {
pr_debug("Can't get tuple\n");
&tuple))
return 0;
}
/* look for tuple match */
zone = nf_ct_zone_tmpl(tmpl, skb, &tmp);
......@@ -1864,18 +1855,16 @@ resolve_normal_ct(struct nf_conn *tmpl,
if (NF_CT_DIRECTION(h) == IP_CT_DIR_REPLY) {
ctinfo = IP_CT_ESTABLISHED_REPLY;
} else {
unsigned long status = READ_ONCE(ct->status);
/* Once we've had two way comms, always ESTABLISHED. */
if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
pr_debug("normal packet for %p\n", ct);
if (likely(status & IPS_SEEN_REPLY))
ctinfo = IP_CT_ESTABLISHED;
} else if (test_bit(IPS_EXPECTED_BIT, &ct->status)) {
pr_debug("related packet for %p\n", ct);
else if (status & IPS_EXPECTED)
ctinfo = IP_CT_RELATED;
} else {
pr_debug("new packet for %p\n", ct);
else
ctinfo = IP_CT_NEW;
}
}
nf_ct_set(skb, ct, ctinfo);
return 0;
}
......@@ -1988,7 +1977,6 @@ nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state)
/* rcu_read_lock()ed by nf_hook_thresh */
dataoff = get_l4proto(skb, skb_network_offset(skb), state->pf, &protonum);
if (dataoff <= 0) {
pr_debug("not prepared to track yet or error occurred\n");
NF_CT_STAT_INC_ATOMIC(state->net, invalid);
ret = NF_ACCEPT;
goto out;
......@@ -2027,7 +2015,6 @@ nf_conntrack_in(struct sk_buff *skb, const struct nf_hook_state *state)
if (ret <= 0) {
/* Invalid: inverse of the return code tells
* the netfilter core what to do */
pr_debug("nf_conntrack_in: Can't track with proto module\n");
nf_ct_put(ct);
skb->_nfct = 0;
/* Special case: TCP tracker reports an attempt to reopen a
......@@ -2066,7 +2053,6 @@ void nf_conntrack_alter_reply(struct nf_conn *ct,
/* Should be unconfirmed, so not in hash table yet */
WARN_ON(nf_ct_is_confirmed(ct));
pr_debug("Altering reply tuple of %p to ", ct);
nf_ct_dump_tuple(newreply);
ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
......
net/netfilter/nf_conntrack_proto.c
View file @ 4218b0e2
......@@ -284,16 +284,11 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
/* We only do TCP and SCTP at the moment: is there a better way? */
if (tuple.dst.protonum != IPPROTO_TCP &&
tuple.dst.protonum != IPPROTO_SCTP) {
pr_debug("SO_ORIGINAL_DST: Not a TCP/SCTP socket\n");
tuple.dst.protonum != IPPROTO_SCTP)
return -ENOPROTOOPT;
}
if ((unsigned int)*len < sizeof(struct sockaddr_in)) {
pr_debug("SO_ORIGINAL_DST: len %d not %zu\n",
*len, sizeof(struct sockaddr_in));
if ((unsigned int)*len < sizeof(struct sockaddr_in))
return -EINVAL;
}
h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
if (h) {
......@@ -307,17 +302,12 @@ getorigdst(struct sock *sk, int optval, void __user *user, int *len)
.tuple.dst.u3.ip;
memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
pr_debug("SO_ORIGINAL_DST: %pI4 %u\n",
&sin.sin_addr.s_addr, ntohs(sin.sin_port));
nf_ct_put(ct);
if (copy_to_user(user, &sin, sizeof(sin)) != 0)
return -EFAULT;
else
return 0;
}
pr_debug("SO_ORIGINAL_DST: Can't find %pI4/%u-%pI4/%u.\n",
&tuple.src.u3.ip, ntohs(tuple.src.u.tcp.port),
&tuple.dst.u3.ip, ntohs(tuple.dst.u.tcp.port));
return -ENOENT;
}
......@@ -360,12 +350,8 @@ ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
return -EINVAL;
h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
if (!h) {
pr_debug("IP6T_SO_ORIGINAL_DST: Can't find %pI6c/%u-%pI6c/%u.\n",
&tuple.src.u3.ip6, ntohs(tuple.src.u.tcp.port),
&tuple.dst.u3.ip6, ntohs(tuple.dst.u.tcp.port));
if (!h)
return -ENOENT;
}
ct = nf_ct_tuplehash_to_ctrack(h);
......
net/netfilter/nf_conntrack_proto_sctp.c
View file @ 4218b0e2
......@@ -168,7 +168,8 @@ for ((offset) = (dataoff) + sizeof(struct sctphdr), (count) = 0; \
static int do_basic_checks(struct nf_conn *ct,
const struct sk_buff *skb,
unsigned int dataoff,
unsigned long *map)
unsigned long *map,
const struct nf_hook_state *state)
{
u_int32_t offset, count;
struct sctp_chunkhdr _sch, *sch;
......@@ -177,8 +178,6 @@ static int do_basic_checks(struct nf_conn *ct,
flag = 0;
for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
pr_debug("Chunk Num: %d Type: %d\n", count, sch->type);
if (sch->type == SCTP_CID_INIT ||
sch->type == SCTP_CID_INIT_ACK ||
sch->type == SCTP_CID_SHUTDOWN_COMPLETE)
......@@ -193,7 +192,9 @@ static int do_basic_checks(struct nf_conn *ct,
sch->type == SCTP_CID_COOKIE_ECHO ||
flag) &&
count != 0) || !sch->length) {
pr_debug("Basic checks failed\n");
nf_ct_l4proto_log_invalid(skb, ct, state,
"%s failed. chunk num %d, type %d, len %d flag %d\n",
__func__, count, sch->type, sch->length, flag);
return 1;
}
......@@ -201,7 +202,6 @@ static int do_basic_checks(struct nf_conn *ct,
set_bit(sch->type, map);
}
pr_debug("Basic checks passed\n");
return count == 0;
}
......@@ -211,69 +211,51 @@ static int sctp_new_state(enum ip_conntrack_dir dir,
{
int i;
pr_debug("Chunk type: %d\n", chunk_type);
switch (chunk_type) {
case SCTP_CID_INIT:
pr_debug("SCTP_CID_INIT\n");
i = 0;
break;
case SCTP_CID_INIT_ACK:
pr_debug("SCTP_CID_INIT_ACK\n");
i = 1;
break;
case SCTP_CID_ABORT:
pr_debug("SCTP_CID_ABORT\n");
i = 2;
break;
case SCTP_CID_SHUTDOWN:
pr_debug("SCTP_CID_SHUTDOWN\n");
i = 3;
break;
case SCTP_CID_SHUTDOWN_ACK:
pr_debug("SCTP_CID_SHUTDOWN_ACK\n");
i = 4;
break;
case SCTP_CID_ERROR:
pr_debug("SCTP_CID_ERROR\n");
i = 5;
break;
case SCTP_CID_COOKIE_ECHO:
pr_debug("SCTP_CID_COOKIE_ECHO\n");
i = 6;
break;
case SCTP_CID_COOKIE_ACK:
pr_debug("SCTP_CID_COOKIE_ACK\n");
i = 7;
break;
case SCTP_CID_SHUTDOWN_COMPLETE:
pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n");
i = 8;
break;
case SCTP_CID_HEARTBEAT:
pr_debug("SCTP_CID_HEARTBEAT");
i = 9;
break;
case SCTP_CID_HEARTBEAT_ACK:
pr_debug("SCTP_CID_HEARTBEAT_ACK");
i = 10;
break;
case SCTP_CID_DATA:
case SCTP_CID_SACK:
pr_debug("SCTP_CID_DATA/SACK");
i = 11;
break;
default:
/* Other chunks like DATA or SACK do not change the state */
pr_debug("Unknown chunk type, Will stay in %s\n",
sctp_conntrack_names[cur_state]);
pr_debug("Unknown chunk type %d, Will stay in %s\n",
chunk_type, sctp_conntrack_names[cur_state]);
return cur_state;
}
pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
dir, sctp_conntrack_names[cur_state], chunk_type,
sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
return sctp_conntracks[dir][i][cur_state];
}
......@@ -392,7 +374,7 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
if (sh == NULL)
goto out;
if (do_basic_checks(ct, skb, dataoff, map) != 0)
if (do_basic_checks(ct, skb, dataoff, map, state) != 0)
goto out;
if (!nf_ct_is_confirmed(ct)) {
......@@ -414,7 +396,9 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
!test_bit(SCTP_CID_HEARTBEAT, map) &&
!test_bit(SCTP_CID_HEARTBEAT_ACK, map) &&
sh->vtag != ct->proto.sctp.vtag[dir]) {
pr_debug("Verification tag check failed\n");
nf_ct_l4proto_log_invalid(skb, ct, state,
"verification tag check failed %x vs %x for dir %d",
sh->vtag, ct->proto.sctp.vtag[dir], dir);
goto out;
}
}
......@@ -488,9 +472,10 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
/* Invalid */
if (new_state == SCTP_CONNTRACK_MAX) {
pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u "
"conntrack=%u\n",
dir, sch->type, old_state);
nf_ct_l4proto_log_invalid(skb, ct, state,
"Invalid, old_state %d, dir %d, type %d",
old_state, dir, sch->type);
goto out_unlock;
}
......@@ -536,7 +521,6 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED &&
dir == IP_CT_DIR_REPLY &&
new_state == SCTP_CONNTRACK_ESTABLISHED) {
pr_debug("Setting assured bit\n");
set_bit(IPS_ASSURED_BIT, &ct->status);
nf_conntrack_event_cache(IPCT_ASSURED, ct);
}
......
net/netfilter/nf_conntrack_proto_tcp.c
View file @ 4218b0e2
......@@ -930,7 +930,6 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct,
{
struct net *net = nf_ct_net(ct);
struct nf_tcp_net *tn = nf_tcp_pernet(net);
struct nf_conntrack_tuple *tuple;
enum tcp_conntrack new_state, old_state;
unsigned int index, *timeouts;
enum nf_ct_tcp_action res;
......@@ -954,7 +953,6 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct,
dir = CTINFO2DIR(ctinfo);
index = get_conntrack_index(th);
new_state = tcp_conntracks[dir][index][old_state];
tuple = &ct->tuplehash[dir].tuple;
switch (new_state) {
case TCP_CONNTRACK_SYN_SENT:
......@@ -1217,13 +1215,6 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct,
ct->proto.tcp.last_index = index;
ct->proto.tcp.last_dir = dir;
pr_debug("tcp_conntracks: ");
nf_ct_dump_tuple(tuple);
pr_debug("syn=%i ack=%i fin=%i rst=%i old=%i new=%i\n",
(th->syn ? 1 : 0), (th->ack ? 1 : 0),
(th->fin ? 1 : 0), (th->rst ? 1 : 0),
old_state, new_state);
ct->proto.tcp.state = new_state;
if (old_state != new_state
&& new_state == TCP_CONNTRACK_FIN_WAIT)
......
net/netfilter/nf_conntrack_proto_udp.c
View file @ 4218b0e2
......@@ -88,6 +88,7 @@ int nf_conntrack_udp_packet(struct nf_conn *ct,
const struct nf_hook_state *state)
{
unsigned int *timeouts;
unsigned long status;
if (udp_error(skb, dataoff, state))
return -NF_ACCEPT;
......@@ -96,26 +97,27 @@ int nf_conntrack_udp_packet(struct nf_conn *ct,
if (!timeouts)
timeouts = udp_get_timeouts(nf_ct_net(ct));
if (!nf_ct_is_confirmed(ct))
status = READ_ONCE(ct->status);
if ((status & IPS_CONFIRMED) == 0)
ct->proto.udp.stream_ts = 2 * HZ + jiffies;
/* If we've seen traffic both ways, this is some kind of UDP
* stream. Set Assured.
*/
if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
if (status & IPS_SEEN_REPLY_BIT) {
unsigned long extra = timeouts[UDP_CT_UNREPLIED];
bool stream = false;
/* Still active after two seconds? Extend timeout. */
if (time_after(jiffies, ct->proto.udp.stream_ts)) {
extra = timeouts[UDP_CT_REPLIED];
stream = true;
stream = (status & IPS_ASSURED) == 0;
}
nf_ct_refresh_acct(ct, ctinfo, skb, extra);
/* never set ASSURED for IPS_NAT_CLASH, they time out soon */
if (unlikely((ct->status & IPS_NAT_CLASH)))
if (unlikely((status & IPS_NAT_CLASH)))
return NF_ACCEPT;
/* Also, more likely to be important, and not a probe */
......
net/netfilter/nf_tables_api.c
View file @ 4218b0e2
......@@ -1401,6 +1401,10 @@ static int nf_tables_deltable(struct sk_buff *skb, const struct nfnl_info *info,
}
if (IS_ERR(table)) {
if (PTR_ERR(table) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYTABLE)
return 0;
NL_SET_BAD_ATTR(extack, attr);
return PTR_ERR(table);
}
......@@ -2639,6 +2643,10 @@ static int nf_tables_delchain(struct sk_buff *skb, const struct nfnl_info *info,
chain = nft_chain_lookup(net, table, attr, genmask);
}
if (IS_ERR(chain)) {
if (PTR_ERR(chain) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYCHAIN)
return 0;
NL_SET_BAD_ATTR(extack, attr);
return PTR_ERR(chain);
}
......@@ -3716,6 +3724,10 @@ static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
chain = nft_chain_lookup(net, table, nla[NFTA_RULE_CHAIN],
genmask);
if (IS_ERR(chain)) {
if (PTR_ERR(rule) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
return 0;
NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_CHAIN]);
return PTR_ERR(chain);
}
......@@ -3729,6 +3741,10 @@ static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
if (nla[NFTA_RULE_HANDLE]) {
rule = nft_rule_lookup(chain, nla[NFTA_RULE_HANDLE]);
if (IS_ERR(rule)) {
if (PTR_ERR(rule) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYRULE)
return 0;
NL_SET_BAD_ATTR(extack, nla[NFTA_RULE_HANDLE]);
return PTR_ERR(rule);
}
......@@ -4808,6 +4824,10 @@ static int nf_tables_delset(struct sk_buff *skb, const struct nfnl_info *info,
}
if (IS_ERR(set)) {
if (PTR_ERR(set) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSET)
return 0;
NL_SET_BAD_ATTR(extack, attr);
return PTR_ERR(set);
}
......@@ -6690,6 +6710,10 @@ static int nf_tables_delsetelem(struct sk_buff *skb,
nla_for_each_nested(attr, nla[NFTA_SET_ELEM_LIST_ELEMENTS], rem) {
err = nft_del_setelem(&ctx, set, attr);
if (err == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYSETELEM)
continue;
if (err < 0) {
NL_SET_BAD_ATTR(extack, attr);
break;
......@@ -7334,6 +7358,10 @@ static int nf_tables_delobj(struct sk_buff *skb, const struct nfnl_info *info,
}
if (IS_ERR(obj)) {
if (PTR_ERR(obj) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYOBJ)
return 0;
NL_SET_BAD_ATTR(extack, attr);
return PTR_ERR(obj);
}
......@@ -7964,6 +7992,10 @@ static int nf_tables_delflowtable(struct sk_buff *skb,
}
if (IS_ERR(flowtable)) {
if (PTR_ERR(flowtable) == -ENOENT &&
NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_DESTROYFLOWTABLE)
return 0;
NL_SET_BAD_ATTR(extack, attr);
return PTR_ERR(flowtable);
}
......@@ -8373,6 +8405,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_TABLE_MAX,
.policy = nft_table_policy,
},
[NFT_MSG_DESTROYTABLE] = {
.call = nf_tables_deltable,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_TABLE_MAX,
.policy = nft_table_policy,
},
[NFT_MSG_NEWCHAIN] = {
.call = nf_tables_newchain,
.type = NFNL_CB_BATCH,
......@@ -8391,6 +8429,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_CHAIN_MAX,
.policy = nft_chain_policy,
},
[NFT_MSG_DESTROYCHAIN] = {
.call = nf_tables_delchain,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_CHAIN_MAX,
.policy = nft_chain_policy,
},
[NFT_MSG_NEWRULE] = {
.call = nf_tables_newrule,
.type = NFNL_CB_BATCH,
......@@ -8415,6 +8459,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_RULE_MAX,
.policy = nft_rule_policy,
},
[NFT_MSG_DESTROYRULE] = {
.call = nf_tables_delrule,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_RULE_MAX,
.policy = nft_rule_policy,
},
[NFT_MSG_NEWSET] = {
.call = nf_tables_newset,
.type = NFNL_CB_BATCH,
......@@ -8433,6 +8483,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_SET_MAX,
.policy = nft_set_policy,
},
[NFT_MSG_DESTROYSET] = {
.call = nf_tables_delset,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_SET_MAX,
.policy = nft_set_policy,
},
[NFT_MSG_NEWSETELEM] = {
.call = nf_tables_newsetelem,
.type = NFNL_CB_BATCH,
......@@ -8451,6 +8507,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_SET_ELEM_LIST_MAX,
.policy = nft_set_elem_list_policy,
},
[NFT_MSG_DESTROYSETELEM] = {
.call = nf_tables_delsetelem,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_SET_ELEM_LIST_MAX,
.policy = nft_set_elem_list_policy,
},
[NFT_MSG_GETGEN] = {
.call = nf_tables_getgen,
.type = NFNL_CB_RCU,
......@@ -8473,6 +8535,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
[NFT_MSG_DESTROYOBJ] = {
.call = nf_tables_delobj,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_OBJ_MAX,
.policy = nft_obj_policy,
},
[NFT_MSG_GETOBJ_RESET] = {
.call = nf_tables_getobj,
.type = NFNL_CB_RCU,
......@@ -8497,6 +8565,12 @@ static const struct nfnl_callback nf_tables_cb[NFT_MSG_MAX] = {
.attr_count = NFTA_FLOWTABLE_MAX,
.policy = nft_flowtable_policy,
},
[NFT_MSG_DESTROYFLOWTABLE] = {
.call = nf_tables_delflowtable,
.type = NFNL_CB_BATCH,
.attr_count = NFTA_FLOWTABLE_MAX,
.policy = nft_flowtable_policy,
},
};
static int nf_tables_validate(struct net *net)
......@@ -8590,6 +8664,7 @@ static void nft_commit_release(struct nft_trans *trans)
{
switch (trans->msg_type) {
case NFT_MSG_DELTABLE:
case NFT_MSG_DESTROYTABLE:
nf_tables_table_destroy(&trans->ctx);
break;
case NFT_MSG_NEWCHAIN:
......@@ -8597,23 +8672,29 @@ static void nft_commit_release(struct nft_trans *trans)
kfree(nft_trans_chain_name(trans));
break;
case NFT_MSG_DELCHAIN:
case NFT_MSG_DESTROYCHAIN:
nf_tables_chain_destroy(&trans->ctx);
break;
case NFT_MSG_DELRULE:
case NFT_MSG_DESTROYRULE:
nf_tables_rule_destroy(&trans->ctx, nft_trans_rule(trans));
break;
case NFT_MSG_DELSET:
case NFT_MSG_DESTROYSET:
nft_set_destroy(&trans->ctx, nft_trans_set(trans));
break;
case NFT_MSG_DELSETELEM:
case NFT_MSG_DESTROYSETELEM:
nf_tables_set_elem_destroy(&trans->ctx,
nft_trans_elem_set(trans),
nft_trans_elem(trans).priv);
break;
case NFT_MSG_DELOBJ:
case NFT_MSG_DESTROYOBJ:
nft_obj_destroy(&trans->ctx, nft_trans_obj(trans));
break;
case NFT_MSG_DELFLOWTABLE:
case NFT_MSG_DESTROYFLOWTABLE:
if (nft_trans_flowtable_update(trans))
nft_flowtable_hooks_destroy(&nft_trans_flowtable_hooks(trans));
else
......@@ -9065,8 +9146,9 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_destroy(trans);
break;
case NFT_MSG_DELTABLE:
case NFT_MSG_DESTROYTABLE:
list_del_rcu(&trans->ctx.table->list);
nf_tables_table_notify(&trans->ctx, NFT_MSG_DELTABLE);
nf_tables_table_notify(&trans->ctx, trans->msg_type);
break;
case NFT_MSG_NEWCHAIN:
if (nft_trans_chain_update(trans)) {
......@@ -9081,8 +9163,9 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
}
break;
case NFT_MSG_DELCHAIN:
case NFT_MSG_DESTROYCHAIN:
nft_chain_del(trans->ctx.chain);
nf_tables_chain_notify(&trans->ctx, NFT_MSG_DELCHAIN);
nf_tables_chain_notify(&trans->ctx, trans->msg_type);
nf_tables_unregister_hook(trans->ctx.net,
trans->ctx.table,
trans->ctx.chain);
......@@ -9098,10 +9181,11 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_destroy(trans);
break;
case NFT_MSG_DELRULE:
case NFT_MSG_DESTROYRULE:
list_del_rcu(&nft_trans_rule(trans)->list);
nf_tables_rule_notify(&trans->ctx,
nft_trans_rule(trans),
NFT_MSG_DELRULE);
trans->msg_type);
nft_rule_expr_deactivate(&trans->ctx,
nft_trans_rule(trans),
NFT_TRANS_COMMIT);
......@@ -9129,9 +9213,10 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_destroy(trans);
break;
case NFT_MSG_DELSET:
case NFT_MSG_DESTROYSET:
list_del_rcu(&nft_trans_set(trans)->list);
nf_tables_set_notify(&trans->ctx, nft_trans_set(trans),
NFT_MSG_DELSET, GFP_KERNEL);
trans->msg_type, GFP_KERNEL);
break;
case NFT_MSG_NEWSETELEM:
te = (struct nft_trans_elem *)trans->data;
......@@ -9143,11 +9228,12 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_destroy(trans);
break;
case NFT_MSG_DELSETELEM:
case NFT_MSG_DESTROYSETELEM:
te = (struct nft_trans_elem *)trans->data;
nf_tables_setelem_notify(&trans->ctx, te->set,
&te->elem,
NFT_MSG_DELSETELEM);
trans->msg_type);
nft_setelem_remove(net, te->set, &te->elem);
if (!nft_setelem_is_catchall(te->set, &te->elem)) {
atomic_dec(&te->set->nelems);
......@@ -9169,9 +9255,10 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
}
break;
case NFT_MSG_DELOBJ:
case NFT_MSG_DESTROYOBJ:
nft_obj_del(nft_trans_obj(trans));
nf_tables_obj_notify(&trans->ctx, nft_trans_obj(trans),
NFT_MSG_DELOBJ);
trans->msg_type);
break;
case NFT_MSG_NEWFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
......@@ -9193,11 +9280,12 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nft_trans_destroy(trans);
break;
case NFT_MSG_DELFLOWTABLE:
case NFT_MSG_DESTROYFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
nf_tables_flowtable_notify(&trans->ctx,
nft_trans_flowtable(trans),
&nft_trans_flowtable_hooks(trans),
NFT_MSG_DELFLOWTABLE);
trans->msg_type);
nft_unregister_flowtable_net_hooks(net,
&nft_trans_flowtable_hooks(trans));
} else {
......@@ -9205,7 +9293,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb)
nf_tables_flowtable_notify(&trans->ctx,
nft_trans_flowtable(trans),
&nft_trans_flowtable(trans)->hook_list,
NFT_MSG_DELFLOWTABLE);
trans->msg_type);
nft_unregister_flowtable_net_hooks(net,
&nft_trans_flowtable(trans)->hook_list);
}
......@@ -9301,6 +9389,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
}
break;
case NFT_MSG_DELTABLE:
case NFT_MSG_DESTROYTABLE:
nft_clear(trans->ctx.net, trans->ctx.table);
nft_trans_destroy(trans);
break;
......@@ -9322,6 +9411,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
}
break;
case NFT_MSG_DELCHAIN:
case NFT_MSG_DESTROYCHAIN:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, trans->ctx.chain);
nft_trans_destroy(trans);
......@@ -9336,6 +9426,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
nft_flow_rule_destroy(nft_trans_flow_rule(trans));
break;
case NFT_MSG_DELRULE:
case NFT_MSG_DESTROYRULE:
trans->ctx.chain->use++;
nft_clear(trans->ctx.net, nft_trans_rule(trans));
nft_rule_expr_activate(&trans->ctx, nft_trans_rule(trans));
......@@ -9357,6 +9448,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
list_del_rcu(&nft_trans_set(trans)->list);
break;
case NFT_MSG_DELSET:
case NFT_MSG_DESTROYSET:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, nft_trans_set(trans));
nft_trans_destroy(trans);
......@@ -9372,6 +9464,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
atomic_dec(&te->set->nelems);
break;
case NFT_MSG_DELSETELEM:
case NFT_MSG_DESTROYSETELEM:
te = (struct nft_trans_elem *)trans->data;
nft_setelem_data_activate(net, te->set, &te->elem);
......@@ -9391,6 +9484,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
}
break;
case NFT_MSG_DELOBJ:
case NFT_MSG_DESTROYOBJ:
trans->ctx.table->use++;
nft_clear(trans->ctx.net, nft_trans_obj(trans));
nft_trans_destroy(trans);
......@@ -9407,6 +9501,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action)
}
break;
case NFT_MSG_DELFLOWTABLE:
case NFT_MSG_DESTROYFLOWTABLE:
if (nft_trans_flowtable_update(trans)) {
list_splice(&nft_trans_flowtable_hooks(trans),
&nft_trans_flowtable(trans)->hook_list);
......
net/netfilter/nf_tables_core.c
View file @ 4218b0e2
......@@ -21,6 +21,26 @@
#include <net/netfilter/nf_log.h>
#include <net/netfilter/nft_meta.h>
#if defined(CONFIG_RETPOLINE) && defined(CONFIG_X86)
static struct static_key_false nf_tables_skip_direct_calls;
static bool nf_skip_indirect_calls(void)
{
return static_branch_likely(&nf_tables_skip_direct_calls);
}
static void __init nf_skip_indirect_calls_enable(void)
{
if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE))
static_branch_enable(&nf_tables_skip_direct_calls);
}
#else
static inline bool nf_skip_indirect_calls(void) { return false; }
static inline void nf_skip_indirect_calls_enable(void) { }
#endif
static noinline void __nft_trace_packet(struct nft_traceinfo *info,
const struct nft_chain *chain,
enum nft_trace_types type)
......@@ -193,7 +213,12 @@ static void expr_call_ops_eval(const struct nft_expr *expr,
struct nft_pktinfo *pkt)
{
#ifdef CONFIG_RETPOLINE
unsigned long e = (unsigned long)expr->ops->eval;
unsigned long e;
if (nf_skip_indirect_calls())
goto indirect_call;
e = (unsigned long)expr->ops->eval;
#define X(e, fun) \
do { if ((e) == (unsigned long)(fun)) \
return fun(expr, regs, pkt); } while (0)
......@@ -203,13 +228,19 @@ static void expr_call_ops_eval(const struct nft_expr *expr,
X(e, nft_counter_eval);
X(e, nft_meta_get_eval);
X(e, nft_lookup_eval);
#if IS_ENABLED(CONFIG_NFT_CT)
X(e, nft_ct_get_fast_eval);
#endif
X(e, nft_range_eval);
X(e, nft_immediate_eval);
X(e, nft_byteorder_eval);
X(e, nft_dynset_eval);
X(e, nft_rt_get_eval);
X(e, nft_bitwise_eval);
X(e, nft_objref_eval);
X(e, nft_objref_map_eval);
#undef X
indirect_call:
#endif /* CONFIG_RETPOLINE */
expr->ops->eval(expr, regs, pkt);
}
......@@ -369,6 +400,8 @@ int __init nf_tables_core_module_init(void)
goto err;
}
nf_skip_indirect_calls_enable();
return 0;
err:
......
net/netfilter/nft_ct.c
View file @ 4218b0e2
......@@ -12,7 +12,7 @@
#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_tuple.h>
......@@ -23,16 +23,6 @@
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
struct nft_ct {
enum nft_ct_keys key:8;
enum ip_conntrack_dir dir:8;
u8 len;
union {
u8 dreg;
u8 sreg;
};
};
struct nft_ct_helper_obj {
struct nf_conntrack_helper *helper4;
struct nf_conntrack_helper *helper6;
......@@ -759,6 +749,18 @@ static bool nft_ct_set_reduce(struct nft_regs_track *track,
return false;
}
#ifdef CONFIG_RETPOLINE
static const struct nft_expr_ops nft_ct_get_fast_ops = {
.type = &nft_ct_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
.eval = nft_ct_get_fast_eval,
.init = nft_ct_get_init,
.destroy = nft_ct_get_destroy,
.dump = nft_ct_get_dump,
.reduce = nft_ct_set_reduce,
};
#endif
static const struct nft_expr_ops nft_ct_set_ops = {
.type = &nft_ct_type,
.size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
......@@ -791,8 +793,21 @@ nft_ct_select_ops(const struct nft_ctx *ctx,
if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG])
return ERR_PTR(-EINVAL);
if (tb[NFTA_CT_DREG])
if (tb[NFTA_CT_DREG]) {
#ifdef CONFIG_RETPOLINE
u32 k = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
switch (k) {
case NFT_CT_STATE:
case NFT_CT_DIRECTION:
case NFT_CT_STATUS:
case NFT_CT_MARK:
case NFT_CT_SECMARK:
return &nft_ct_get_fast_ops;
}
#endif
return &nft_ct_get_ops;
}
if (tb[NFTA_CT_SREG]) {
#ifdef CONFIG_NF_CONNTRACK_ZONES
......
net/netfilter/nft_ct_fast.c 0 → 100644
View file @ 4218b0e2
// SPDX-License-Identifier: GPL-2.0-only
#if IS_ENABLED(CONFIG_NFT_CT)
#include <linux/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
#include <net/netfilter/nf_conntrack.h>
void nft_ct_get_fast_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
const struct nft_ct *priv = nft_expr_priv(expr);
u32 *dest = &regs->data[priv->dreg];
enum ip_conntrack_info ctinfo;
const struct nf_conn *ct;
unsigned int state;
ct = nf_ct_get(pkt->skb, &ctinfo);
if (!ct) {
regs->verdict.code = NFT_BREAK;
return;
}
switch (priv->key) {
case NFT_CT_STATE:
if (ct)
state = NF_CT_STATE_BIT(ctinfo);
else if (ctinfo == IP_CT_UNTRACKED)
state = NF_CT_STATE_UNTRACKED_BIT;
else
state = NF_CT_STATE_INVALID_BIT;
*dest = state;
return;
case NFT_CT_DIRECTION:
nft_reg_store8(dest, CTINFO2DIR(ctinfo));
return;
case NFT_CT_STATUS:
*dest = ct->status;
return;
#ifdef CONFIG_NF_CONNTRACK_MARK
case NFT_CT_MARK:
*dest = ct->mark;
return;
#endif
#ifdef CONFIG_NF_CONNTRACK_SECMARK
case NFT_CT_SECMARK:
*dest = ct->secmark;
return;
#endif
default:
WARN_ON_ONCE(1);
regs->verdict.code = NFT_BREAK;
break;
}
}
EXPORT_SYMBOL_GPL(nft_ct_get_fast_eval);
#endif
net/netfilter/nft_objref.c
View file @ 4218b0e2
......@@ -13,7 +13,7 @@
#define nft_objref_priv(expr) *((struct nft_object **)nft_expr_priv(expr))
static void nft_objref_eval(const struct nft_expr *expr,
void nft_objref_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
......@@ -100,7 +100,7 @@ struct nft_objref_map {
struct nft_set_binding binding;
};
static void nft_objref_map_eval(const struct nft_expr *expr,
void nft_objref_map_eval(const struct nft_expr *expr,
struct nft_regs *regs,
const struct nft_pktinfo *pkt)
{
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7