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linux/net/sched/cls_flower.c

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/*
* net/sched/cls_flower.c Flower classifier
*
* Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/rhashtable.h>
#include <linux/workqueue.h>
#include <linux/if_ether.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/mpls.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
#include <net/ip.h>
#include <net/flow_dissector.h>
#include <net/dst.h>
#include <net/dst_metadata.h>
struct fl_flow_key {
int indev_ifindex;
struct flow_dissector_key_control control;
struct flow_dissector_key_control enc_control;
struct flow_dissector_key_basic basic;
struct flow_dissector_key_eth_addrs eth;
struct flow_dissector_key_vlan vlan;
union {
struct flow_dissector_key_ipv4_addrs ipv4;
struct flow_dissector_key_ipv6_addrs ipv6;
};
struct flow_dissector_key_ports tp;
struct flow_dissector_key_icmp icmp;
struct flow_dissector_key_arp arp;
struct flow_dissector_key_keyid enc_key_id;
union {
struct flow_dissector_key_ipv4_addrs enc_ipv4;
struct flow_dissector_key_ipv6_addrs enc_ipv6;
};
struct flow_dissector_key_ports enc_tp;
struct flow_dissector_key_mpls mpls;
struct flow_dissector_key_tcp tcp;
struct flow_dissector_key_ip ip;
} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
struct fl_flow_mask_range {
unsigned short int start;
unsigned short int end;
};
struct fl_flow_mask {
struct fl_flow_key key;
struct fl_flow_mask_range range;
struct rcu_head rcu;
};
struct cls_fl_head {
struct rhashtable ht;
struct fl_flow_mask mask;
struct flow_dissector dissector;
bool mask_assigned;
struct list_head filters;
struct rhashtable_params ht_params;
union {
struct work_struct work;
struct rcu_head rcu;
};
struct idr handle_idr;
};
struct cls_fl_filter {
struct rhash_head ht_node;
struct fl_flow_key mkey;
struct tcf_exts exts;
struct tcf_result res;
struct fl_flow_key key;
struct list_head list;
u32 handle;
u32 flags;
struct rcu_head rcu;
struct net_device *hw_dev;
};
static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
{
return mask->range.end - mask->range.start;
}
static void fl_mask_update_range(struct fl_flow_mask *mask)
{
const u8 *bytes = (const u8 *) &mask->key;
size_t size = sizeof(mask->key);
size_t i, first = 0, last = size - 1;
for (i = 0; i < sizeof(mask->key); i++) {
if (bytes[i]) {
if (!first && i)
first = i;
last = i;
}
}
mask->range.start = rounddown(first, sizeof(long));
mask->range.end = roundup(last + 1, sizeof(long));
}
static void *fl_key_get_start(struct fl_flow_key *key,
const struct fl_flow_mask *mask)
{
return (u8 *) key + mask->range.start;
}
static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
struct fl_flow_mask *mask)
{
const long *lkey = fl_key_get_start(key, mask);
const long *lmask = fl_key_get_start(&mask->key, mask);
long *lmkey = fl_key_get_start(mkey, mask);
int i;
for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
*lmkey++ = *lkey++ & *lmask++;
}
static void fl_clear_masked_range(struct fl_flow_key *key,
struct fl_flow_mask *mask)
{
memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
}
static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
struct fl_flow_key *mkey)
{
return rhashtable_lookup_fast(&head->ht,
fl_key_get_start(mkey, &head->mask),
head->ht_params);
}
static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
struct cls_fl_head *head = rcu_dereference_bh(tp->root);
struct cls_fl_filter *f;
struct fl_flow_key skb_key;
struct fl_flow_key skb_mkey;
struct ip_tunnel_info *info;
if (!atomic_read(&head->ht.nelems))
return -1;
fl_clear_masked_range(&skb_key, &head->mask);
info = skb_tunnel_info(skb);
if (info) {
struct ip_tunnel_key *key = &info->key;
switch (ip_tunnel_info_af(info)) {
case AF_INET:
skb_key.enc_control.addr_type =
FLOW_DISSECTOR_KEY_IPV4_ADDRS;
skb_key.enc_ipv4.src = key->u.ipv4.src;
skb_key.enc_ipv4.dst = key->u.ipv4.dst;
break;
case AF_INET6:
skb_key.enc_control.addr_type =
FLOW_DISSECTOR_KEY_IPV6_ADDRS;
skb_key.enc_ipv6.src = key->u.ipv6.src;
skb_key.enc_ipv6.dst = key->u.ipv6.dst;
break;
}
skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
skb_key.enc_tp.src = key->tp_src;
skb_key.enc_tp.dst = key->tp_dst;
}
skb_key.indev_ifindex = skb->skb_iif;
/* skb_flow_dissect() does not set n_proto in case an unknown protocol,
* so do it rather here.
*/
skb_key.basic.n_proto = skb->protocol;
skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
f = fl_lookup(head, &skb_mkey);
if (f && !tc_skip_sw(f->flags)) {
*res = f->res;
return tcf_exts_exec(skb, &f->exts, res);
}
return -1;
}
static int fl_init(struct tcf_proto *tp)
{
struct cls_fl_head *head;
head = kzalloc(sizeof(*head), GFP_KERNEL);
if (!head)
return -ENOBUFS;
INIT_LIST_HEAD_RCU(&head->filters);
rcu_assign_pointer(tp->root, head);
idr_init(&head->handle_idr);
return 0;
}
static void fl_destroy_filter(struct rcu_head *head)
{
struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
tcf_exts_destroy(&f->exts);
kfree(f);
}
static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
{
struct tc_cls_flower_offload cls_flower = {};
struct net_device *dev = f->hw_dev;
if (!tc_can_offload(dev))
return;
tc_cls_common_offload_init(&cls_flower.common, tp);
cls_flower.command = TC_CLSFLOWER_DESTROY;
cls_flower.cookie = (unsigned long) f;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, &cls_flower);
}
static int fl_hw_replace_filter(struct tcf_proto *tp,
struct flow_dissector *dissector,
struct fl_flow_key *mask,
struct cls_fl_filter *f)
{
struct net_device *dev = tp->q->dev_queue->dev;
struct tc_cls_flower_offload cls_flower = {};
int err;
if (!tc_can_offload(dev)) {
if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
(f->hw_dev && !tc_can_offload(f->hw_dev))) {
f->hw_dev = dev;
return tc_skip_sw(f->flags) ? -EINVAL : 0;
}
dev = f->hw_dev;
cls_flower.egress_dev = true;
} else {
f->hw_dev = dev;
}
tc_cls_common_offload_init(&cls_flower.common, tp);
cls_flower.command = TC_CLSFLOWER_REPLACE;
cls_flower.cookie = (unsigned long) f;
cls_flower.dissector = dissector;
cls_flower.mask = mask;
cls_flower.key = &f->mkey;
cls_flower.exts = &f->exts;
err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER,
&cls_flower);
if (!err)
f->flags |= TCA_CLS_FLAGS_IN_HW;
if (tc_skip_sw(f->flags))
return err;
return 0;
}
static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
{
struct tc_cls_flower_offload cls_flower = {};
struct net_device *dev = f->hw_dev;
if (!tc_can_offload(dev))
return;
tc_cls_common_offload_init(&cls_flower.common, tp);
cls_flower.command = TC_CLSFLOWER_STATS;
cls_flower.cookie = (unsigned long) f;
cls_flower.exts = &f->exts;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER,
&cls_flower);
}
static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
idr_remove_ext(&head->handle_idr, f->handle);
list_del_rcu(&f->list);
if (!tc_skip_hw(f->flags))
fl_hw_destroy_filter(tp, f);
tcf_unbind_filter(tp, &f->res);
call_rcu(&f->rcu, fl_destroy_filter);
}
static void fl_destroy_sleepable(struct work_struct *work)
{
struct cls_fl_head *head = container_of(work, struct cls_fl_head,
work);
if (head->mask_assigned)
rhashtable_destroy(&head->ht);
kfree(head);
module_put(THIS_MODULE);
}
static void fl_destroy_rcu(struct rcu_head *rcu)
{
struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
INIT_WORK(&head->work, fl_destroy_sleepable);
schedule_work(&head->work);
}
static void fl_destroy(struct tcf_proto *tp)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
struct cls_fl_filter *f, *next;
list_for_each_entry_safe(f, next, &head->filters, list)
__fl_delete(tp, f);
idr_destroy(&head->handle_idr);
__module_get(THIS_MODULE);
call_rcu(&head->rcu, fl_destroy_rcu);
}
static void *fl_get(struct tcf_proto *tp, u32 handle)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
return idr_find_ext(&head->handle_idr, handle);
}
static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
[TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
[TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
[TCA_FLOWER_INDEV] = { .type = NLA_STRING,
.len = IFNAMSIZ },
[TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
[TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN },
[TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 },
[TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 },
};
static void fl_set_key_val(struct nlattr **tb,
void *val, int val_type,
void *mask, int mask_type, int len)
{
if (!tb[val_type])
return;
memcpy(val, nla_data(tb[val_type]), len);
if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
memset(mask, 0xff, len);
else
memcpy(mask, nla_data(tb[mask_type]), len);
}
static int fl_set_key_mpls(struct nlattr **tb,
struct flow_dissector_key_mpls *key_val,
struct flow_dissector_key_mpls *key_mask)
{
if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
key_mask->mpls_ttl = MPLS_TTL_MASK;
}
if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
if (bos & ~MPLS_BOS_MASK)
return -EINVAL;
key_val->mpls_bos = bos;
key_mask->mpls_bos = MPLS_BOS_MASK;
}
if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
if (tc & ~MPLS_TC_MASK)
return -EINVAL;
key_val->mpls_tc = tc;
key_mask->mpls_tc = MPLS_TC_MASK;
}
if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
if (label & ~MPLS_LABEL_MASK)
return -EINVAL;
key_val->mpls_label = label;
key_mask->mpls_label = MPLS_LABEL_MASK;
}
return 0;
}
static void fl_set_key_vlan(struct nlattr **tb,
struct flow_dissector_key_vlan *key_val,
struct flow_dissector_key_vlan *key_mask)
{
#define VLAN_PRIORITY_MASK 0x7
if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
key_val->vlan_id =
nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
key_mask->vlan_id = VLAN_VID_MASK;
}
if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
key_val->vlan_priority =
nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
VLAN_PRIORITY_MASK;
key_mask->vlan_priority = VLAN_PRIORITY_MASK;
}
}
static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
u32 *dissector_key, u32 *dissector_mask,
u32 flower_flag_bit, u32 dissector_flag_bit)
{
if (flower_mask & flower_flag_bit) {
*dissector_mask |= dissector_flag_bit;
if (flower_key & flower_flag_bit)
*dissector_key |= dissector_flag_bit;
}
}
static int fl_set_key_flags(struct nlattr **tb,
u32 *flags_key, u32 *flags_mask)
{
u32 key, mask;
/* mask is mandatory for flags */
if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
return -EINVAL;
key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
*flags_key = 0;
*flags_mask = 0;
fl_set_key_flag(key, mask, flags_key, flags_mask,
TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
return 0;
}
static void fl_set_key_ip(struct nlattr **tb,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
&mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
sizeof(key->tos));
fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
&mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
sizeof(key->ttl));
}
static int fl_set_key(struct net *net, struct nlattr **tb,
struct fl_flow_key *key, struct fl_flow_key *mask)
{
__be16 ethertype;
int ret = 0;
#ifdef CONFIG_NET_CLS_IND
if (tb[TCA_FLOWER_INDEV]) {
int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
if (err < 0)
return err;
key->indev_ifindex = err;
mask->indev_ifindex = 0xffffffff;
}
#endif
fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
sizeof(key->eth.dst));
fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
sizeof(key->eth.src));
if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
if (ethertype == htons(ETH_P_8021Q)) {
fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
fl_set_key_val(tb, &key->basic.n_proto,
TCA_FLOWER_KEY_VLAN_ETH_TYPE,
&mask->basic.n_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.n_proto));
} else {
key->basic.n_proto = ethertype;
mask->basic.n_proto = cpu_to_be16(~0);
}
}
if (key->basic.n_proto == htons(ETH_P_IP) ||
key->basic.n_proto == htons(ETH_P_IPV6)) {
fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
&mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.ip_proto));
fl_set_key_ip(tb, &key->ip, &mask->ip);
}
if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
mask->control.addr_type = ~0;
fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
&mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
sizeof(key->ipv4.src));
fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
&mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
sizeof(key->ipv4.dst));
} else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
mask->control.addr_type = ~0;
fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
&mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
sizeof(key->ipv6.src));
fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
&mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
sizeof(key->ipv6.dst));
}
if (key->basic.ip_proto == IPPROTO_TCP) {
fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
sizeof(key->tp.src));
fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
sizeof(key->tp.dst));
fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
&mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
sizeof(key->tcp.flags));
} else if (key->basic.ip_proto == IPPROTO_UDP) {
fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
sizeof(key->tp.src));
fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
sizeof(key->tp.dst));
} else if (key->basic.ip_proto == IPPROTO_SCTP) {
fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
sizeof(key->tp.src));
fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
sizeof(key->tp.dst));
} else if (key->basic.n_proto == htons(ETH_P_IP) &&
key->basic.ip_proto == IPPROTO_ICMP) {
fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
&mask->icmp.type,
TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
sizeof(key->icmp.type));
fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
&mask->icmp.code,
TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
sizeof(key->icmp.code));
} else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
key->basic.ip_proto == IPPROTO_ICMPV6) {
fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
&mask->icmp.type,
TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
sizeof(key->icmp.type));
fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
&mask->icmp.code,
TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
sizeof(key->icmp.code));
} else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
if (ret)
return ret;
} else if (key->basic.n_proto == htons(ETH_P_ARP) ||
key->basic.n_proto == htons(ETH_P_RARP)) {
fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
&mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
sizeof(key->arp.sip));
fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
&mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
sizeof(key->arp.tip));
fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
&mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
sizeof(key->arp.op));
fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
sizeof(key->arp.sha));
fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
sizeof(key->arp.tha));
}
if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
mask->enc_control.addr_type = ~0;
fl_set_key_val(tb, &key->enc_ipv4.src,
TCA_FLOWER_KEY_ENC_IPV4_SRC,
&mask->enc_ipv4.src,
TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
sizeof(key->enc_ipv4.src));
fl_set_key_val(tb, &key->enc_ipv4.dst,
TCA_FLOWER_KEY_ENC_IPV4_DST,
&mask->enc_ipv4.dst,
TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
sizeof(key->enc_ipv4.dst));
}
if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
mask->enc_control.addr_type = ~0;
fl_set_key_val(tb, &key->enc_ipv6.src,
TCA_FLOWER_KEY_ENC_IPV6_SRC,
&mask->enc_ipv6.src,
TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
sizeof(key->enc_ipv6.src));
fl_set_key_val(tb, &key->enc_ipv6.dst,
TCA_FLOWER_KEY_ENC_IPV6_DST,
&mask->enc_ipv6.dst,
TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
sizeof(key->enc_ipv6.dst));
}
fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
&mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
sizeof(key->enc_key_id.keyid));
fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
&mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
sizeof(key->enc_tp.src));
fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
&mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
sizeof(key->enc_tp.dst));
if (tb[TCA_FLOWER_KEY_FLAGS])
ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
return ret;
}
static bool fl_mask_eq(struct fl_flow_mask *mask1,
struct fl_flow_mask *mask2)
{
const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
!memcmp(lmask1, lmask2, fl_mask_range(mask1));
}
static const struct rhashtable_params fl_ht_params = {
.key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
.head_offset = offsetof(struct cls_fl_filter, ht_node),
.automatic_shrinking = true,
};
static int fl_init_hashtable(struct cls_fl_head *head,
struct fl_flow_mask *mask)
{
head->ht_params = fl_ht_params;
head->ht_params.key_len = fl_mask_range(mask);
head->ht_params.key_offset += mask->range.start;
return rhashtable_init(&head->ht, &head->ht_params);
}
#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
#define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
#define FL_KEY_IS_MASKED(mask, member) \
memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
0, FL_KEY_MEMBER_SIZE(member)) \
#define FL_KEY_SET(keys, cnt, id, member) \
do { \
keys[cnt].key_id = id; \
keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
cnt++; \
} while(0);
#define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
do { \
if (FL_KEY_IS_MASKED(mask, member)) \
FL_KEY_SET(keys, cnt, id, member); \
} while(0);
static void fl_init_dissector(struct cls_fl_head *head,
struct fl_flow_mask *mask)
{
struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
size_t cnt = 0;
FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_PORTS, tp);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_IP, ip);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_TCP, tcp);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ICMP, icmp);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ARP, arp);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_MPLS, mpls);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_VLAN, vlan);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
enc_control);
FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
skb_flow_dissector_init(&head->dissector, keys, cnt);
}
static int fl_check_assign_mask(struct cls_fl_head *head,
struct fl_flow_mask *mask)
{
int err;
if (head->mask_assigned) {
if (!fl_mask_eq(&head->mask, mask))
return -EINVAL;
else
return 0;
}
/* Mask is not assigned yet. So assign it and init hashtable
* according to that.
*/
err = fl_init_hashtable(head, mask);
if (err)
return err;
memcpy(&head->mask, mask, sizeof(head->mask));
head->mask_assigned = true;
fl_init_dissector(head, mask);
return 0;
}
static int fl_set_parms(struct net *net, struct tcf_proto *tp,
struct cls_fl_filter *f, struct fl_flow_mask *mask,
unsigned long base, struct nlattr **tb,
struct nlattr *est, bool ovr)
{
int err;
err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr);
if (err < 0)
return err;
if (tb[TCA_FLOWER_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
tcf_bind_filter(tp, &f->res, base);
}
err = fl_set_key(net, tb, &f->key, &mask->key);
if (err)
return err;
fl_mask_update_range(mask);
fl_set_masked_key(&f->mkey, &f->key, mask);
return 0;
}
static int fl_change(struct net *net, struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle, struct nlattr **tca,
void **arg, bool ovr)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
struct cls_fl_filter *fold = *arg;
struct cls_fl_filter *fnew;
struct nlattr **tb;
struct fl_flow_mask mask = {};
unsigned long idr_index;
int err;
if (!tca[TCA_OPTIONS])
return -EINVAL;
tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
if (!tb)
return -ENOBUFS;
err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
fl_policy, NULL);
if (err < 0)
goto errout_tb;
if (fold && handle && fold->handle != handle) {
err = -EINVAL;
goto errout_tb;
}
fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
if (!fnew) {
err = -ENOBUFS;
goto errout_tb;
}
err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
if (err < 0)
goto errout;
if (!handle) {
err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
1, 0x80000000, GFP_KERNEL);
if (err)
goto errout;
fnew->handle = idr_index;
}
/* user specifies a handle and it doesn't exist */
if (handle && !fold) {
err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
handle, handle + 1, GFP_KERNEL);
if (err)
goto errout;
fnew->handle = idr_index;
}
if (tb[TCA_FLOWER_FLAGS]) {
fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
if (!tc_flags_valid(fnew->flags)) {
err = -EINVAL;
goto errout_idr;
}
}
err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
if (err)
goto errout_idr;
err = fl_check_assign_mask(head, &mask);
if (err)
goto errout_idr;
if (!tc_skip_sw(fnew->flags)) {
if (!fold && fl_lookup(head, &fnew->mkey)) {
err = -EEXIST;
goto errout_idr;
}
err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
head->ht_params);
if (err)
goto errout_idr;
}
if (!tc_skip_hw(fnew->flags)) {
err = fl_hw_replace_filter(tp,
&head->dissector,
&mask.key,
fnew);
if (err)
goto errout_idr;
}
if (!tc_in_hw(fnew->flags))
fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
if (fold) {
if (!tc_skip_sw(fold->flags))
rhashtable_remove_fast(&head->ht, &fold->ht_node,
head->ht_params);
if (!tc_skip_hw(fold->flags))
fl_hw_destroy_filter(tp, fold);
}
*arg = fnew;
if (fold) {
fnew->handle = handle;
idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
list_replace_rcu(&fold->list, &fnew->list);
tcf_unbind_filter(tp, &fold->res);
call_rcu(&fold->rcu, fl_destroy_filter);
} else {
list_add_tail_rcu(&fnew->list, &head->filters);
}
kfree(tb);
return 0;
errout_idr:
if (fnew->handle)
idr_remove_ext(&head->handle_idr, fnew->handle);
errout:
tcf_exts_destroy(&fnew->exts);
kfree(fnew);
errout_tb:
kfree(tb);
return err;
}
static int fl_delete(struct tcf_proto *tp, void *arg, bool *last)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
struct cls_fl_filter *f = arg;
if (!tc_skip_sw(f->flags))
rhashtable_remove_fast(&head->ht, &f->ht_node,
head->ht_params);
__fl_delete(tp, f);
*last = list_empty(&head->filters);
return 0;
}
static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
struct cls_fl_filter *f;
list_for_each_entry_rcu(f, &head->filters, list) {
if (arg->count < arg->skip)
goto skip;
if (arg->fn(tp, f, arg) < 0) {
arg->stop = 1;
break;
}
skip:
arg->count++;
}
}
static int fl_dump_key_val(struct sk_buff *skb,
void *val, int val_type,
void *mask, int mask_type, int len)
{
int err;
if (!memchr_inv(mask, 0, len))
return 0;
err = nla_put(skb, val_type, len, val);
if (err)
return err;
if (mask_type != TCA_FLOWER_UNSPEC) {
err = nla_put(skb, mask_type, len, mask);
if (err)
return err;
}
return 0;
}
static int fl_dump_key_mpls(struct sk_buff *skb,
struct flow_dissector_key_mpls *mpls_key,
struct flow_dissector_key_mpls *mpls_mask)
{
int err;
if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
return 0;
if (mpls_mask->mpls_ttl) {
err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
mpls_key->mpls_ttl);
if (err)
return err;
}
if (mpls_mask->mpls_tc) {
err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
mpls_key->mpls_tc);
if (err)
return err;
}
if (mpls_mask->mpls_label) {
err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
mpls_key->mpls_label);
if (err)
return err;
}
if (mpls_mask->mpls_bos) {
err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
mpls_key->mpls_bos);
if (err)
return err;
}
return 0;
}
static int fl_dump_key_ip(struct sk_buff *skb,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
return -1;
return 0;
}
static int fl_dump_key_vlan(struct sk_buff *skb,
struct flow_dissector_key_vlan *vlan_key,
struct flow_dissector_key_vlan *vlan_mask)
{
int err;
if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
return 0;
if (vlan_mask->vlan_id) {
err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
vlan_key->vlan_id);
if (err)
return err;
}
if (vlan_mask->vlan_priority) {
err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
vlan_key->vlan_priority);
if (err)
return err;
}
return 0;
}
static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
u32 *flower_key, u32 *flower_mask,
u32 flower_flag_bit, u32 dissector_flag_bit)
{
if (dissector_mask & dissector_flag_bit) {
*flower_mask |= flower_flag_bit;
if (dissector_key & dissector_flag_bit)
*flower_key |= flower_flag_bit;
}
}
static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
{
u32 key, mask;
__be32 _key, _mask;
int err;
if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
return 0;
key = 0;
mask = 0;
fl_get_key_flag(flags_key, flags_mask, &key, &mask,
TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
_key = cpu_to_be32(key);
_mask = cpu_to_be32(mask);
err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
if (err)
return err;
return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
}
static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
struct sk_buff *skb, struct tcmsg *t)
{
struct cls_fl_head *head = rtnl_dereference(tp->root);
struct cls_fl_filter *f = fh;
struct nlattr *nest;
struct fl_flow_key *key, *mask;
if (!f)
return skb->len;
t->tcm_handle = f->handle;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (!nest)
goto nla_put_failure;
if (f->res.classid &&
nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
goto nla_put_failure;
key = &f->key;
mask = &head->mask.key;
if (mask->indev_ifindex) {
struct net_device *dev;
dev = __dev_get_by_index(net, key->indev_ifindex);
if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
goto nla_put_failure;
}
if (!tc_skip_hw(f->flags))
fl_hw_update_stats(tp, f);
if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
sizeof(key->eth.dst)) ||
fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
sizeof(key->eth.src)) ||
fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
&mask->basic.n_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.n_proto)))
goto nla_put_failure;
if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
goto nla_put_failure;
if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
goto nla_put_failure;
if ((key->basic.n_proto == htons(ETH_P_IP) ||
key->basic.n_proto == htons(ETH_P_IPV6)) &&
(fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
&mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
sizeof(key->basic.ip_proto)) ||
fl_dump_key_ip(skb, &key->ip, &mask->ip)))
goto nla_put_failure;
if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
(fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
&mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
sizeof(key->ipv4.src)) ||
fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
&mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
sizeof(key->ipv4.dst))))
goto nla_put_failure;
else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
(fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
&mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
sizeof(key->ipv6.src)) ||
fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
&mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
sizeof(key->ipv6.dst))))
goto nla_put_failure;
if (key->basic.ip_proto == IPPROTO_TCP &&
(fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
sizeof(key->tp.src)) ||
fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
sizeof(key->tp.dst)) ||
fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
&mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
sizeof(key->tcp.flags))))
goto nla_put_failure;
else if (key->basic.ip_proto == IPPROTO_UDP &&
(fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
sizeof(key->tp.src)) ||
fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
sizeof(key->tp.dst))))
goto nla_put_failure;
else if (key->basic.ip_proto == IPPROTO_SCTP &&
(fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
&mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
sizeof(key->tp.src)) ||
fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
&mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
sizeof(key->tp.dst))))
goto nla_put_failure;
else if (key->basic.n_proto == htons(ETH_P_IP) &&
key->basic.ip_proto == IPPROTO_ICMP &&
(fl_dump_key_val(skb, &key->icmp.type,
TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
sizeof(key->icmp.type)) ||
fl_dump_key_val(skb, &key->icmp.code,
TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
sizeof(key->icmp.code))))
goto nla_put_failure;
else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
key->basic.ip_proto == IPPROTO_ICMPV6 &&
(fl_dump_key_val(skb, &key->icmp.type,
TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
sizeof(key->icmp.type)) ||
fl_dump_key_val(skb, &key->icmp.code,
TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
sizeof(key->icmp.code))))
goto nla_put_failure;
else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
key->basic.n_proto == htons(ETH_P_RARP)) &&
(fl_dump_key_val(skb, &key->arp.sip,
TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
TCA_FLOWER_KEY_ARP_SIP_MASK,
sizeof(key->arp.sip)) ||
fl_dump_key_val(skb, &key->arp.tip,
TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
TCA_FLOWER_KEY_ARP_TIP_MASK,
sizeof(key->arp.tip)) ||
fl_dump_key_val(skb, &key->arp.op,
TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
TCA_FLOWER_KEY_ARP_OP_MASK,
sizeof(key->arp.op)) ||
fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
sizeof(key->arp.sha)) ||
fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
sizeof(key->arp.tha))))
goto nla_put_failure;
if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
(fl_dump_key_val(skb, &key->enc_ipv4.src,
TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
sizeof(key->enc_ipv4.src)) ||
fl_dump_key_val(skb, &key->enc_ipv4.dst,
TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
sizeof(key->enc_ipv4.dst))))
goto nla_put_failure;
else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
(fl_dump_key_val(skb, &key->enc_ipv6.src,
TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
sizeof(key->enc_ipv6.src)) ||
fl_dump_key_val(skb, &key->enc_ipv6.dst,
TCA_FLOWER_KEY_ENC_IPV6_DST,
&mask->enc_ipv6.dst,
TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
sizeof(key->enc_ipv6.dst))))
goto nla_put_failure;
if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
&mask->enc_key_id, TCA_FLOWER_UNSPEC,
sizeof(key->enc_key_id)) ||
fl_dump_key_val(skb, &key->enc_tp.src,
TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
&mask->enc_tp.src,
TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
sizeof(key->enc_tp.src)) ||
fl_dump_key_val(skb, &key->enc_tp.dst,
TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
&mask->enc_tp.dst,
TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
sizeof(key->enc_tp.dst)))
goto nla_put_failure;
if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
goto nla_put_failure;
if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
goto nla_put_failure;
if (tcf_exts_dump(skb, &f->exts))
goto nla_put_failure;
nla_nest_end(skb, nest);
if (tcf_exts_dump_stats(skb, &f->exts) < 0)
goto nla_put_failure;
return skb->len;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
}
static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
{
struct cls_fl_filter *f = fh;
if (f && f->res.classid == classid)
f->res.class = cl;
}
static struct tcf_proto_ops cls_fl_ops __read_mostly = {
.kind = "flower",
.classify = fl_classify,
.init = fl_init,
.destroy = fl_destroy,
.get = fl_get,
.change = fl_change,
.delete = fl_delete,
.walk = fl_walk,
.dump = fl_dump,
.bind_class = fl_bind_class,
.owner = THIS_MODULE,
};
static int __init cls_fl_init(void)
{
return register_tcf_proto_ops(&cls_fl_ops);
}
static void __exit cls_fl_exit(void)
{
unregister_tcf_proto_ops(&cls_fl_ops);
}
module_init(cls_fl_init);
module_exit(cls_fl_exit);
MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
MODULE_DESCRIPTION("Flower classifier");
MODULE_LICENSE("GPL v2");
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