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linux/net/sched/cls_flower.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* net/sched/cls_flower.c Flower classifier
*
* Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/rhashtable.h>
#include <linux/workqueue.h>
#include <linux/refcount.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/geneve.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;
struct flow_dissector_key_vlan cvlan;
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;
struct flow_dissector_key_ip enc_ip;
struct flow_dissector_key_enc_opts enc_opts;
struct flow_dissector_key_ports tp_min;
struct flow_dissector_key_ports tp_max;
} __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;
u32 flags;
struct rhash_head ht_node;
struct rhashtable ht;
struct rhashtable_params filter_ht_params;
struct flow_dissector dissector;
struct list_head filters;
struct rcu_work rwork;
struct list_head list;
refcount_t refcnt;
};
struct fl_flow_tmplt {
struct fl_flow_key dummy_key;
struct fl_flow_key mask;
struct flow_dissector dissector;
struct tcf_chain *chain;
};
struct cls_fl_head {
struct rhashtable ht;
spinlock_t masks_lock; /* Protect masks list */
struct list_head masks;
struct list_head hw_filters;
struct rcu_work rwork;
struct idr handle_idr;
};
struct cls_fl_filter {
struct fl_flow_mask *mask;
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;
struct list_head hw_list;
u32 handle;
u32 flags;
u32 in_hw_count;
struct rcu_work rwork;
struct net_device *hw_dev;
/* Flower classifier is unlocked, which means that its reference counter
* can be changed concurrently without any kind of external
* synchronization. Use atomic reference counter to be concurrency-safe.
*/
refcount_t refcnt;
bool deleted;
};
static const struct rhashtable_params mask_ht_params = {
.key_offset = offsetof(struct fl_flow_mask, key),
.key_len = sizeof(struct fl_flow_key),
.head_offset = offsetof(struct fl_flow_mask, ht_node),
.automatic_shrinking = true,
};
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;
for (i = 0; i < size; i++) {
if (bytes[i]) {
first = i;
break;
}
}
last = first;
for (i = size - 1; i != first; i--) {
if (bytes[i]) {
last = i;
break;
}
}
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 bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
struct fl_flow_mask *mask)
{
const long *lmask = fl_key_get_start(&mask->key, mask);
const long *ltmplt;
int i;
if (!tmplt)
return true;
ltmplt = fl_key_get_start(&tmplt->mask, mask);
for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
if (~*ltmplt++ & *lmask++)
return false;
}
return true;
}
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 bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
struct fl_flow_key *key,
struct fl_flow_key *mkey)
{
__be16 min_mask, max_mask, min_val, max_val;
min_mask = htons(filter->mask->key.tp_min.dst);
max_mask = htons(filter->mask->key.tp_max.dst);
min_val = htons(filter->key.tp_min.dst);
max_val = htons(filter->key.tp_max.dst);
if (min_mask && max_mask) {
if (htons(key->tp.dst) < min_val ||
htons(key->tp.dst) > max_val)
return false;
/* skb does not have min and max values */
mkey->tp_min.dst = filter->mkey.tp_min.dst;
mkey->tp_max.dst = filter->mkey.tp_max.dst;
}
return true;
}
static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
struct fl_flow_key *key,
struct fl_flow_key *mkey)
{
__be16 min_mask, max_mask, min_val, max_val;
min_mask = htons(filter->mask->key.tp_min.src);
max_mask = htons(filter->mask->key.tp_max.src);
min_val = htons(filter->key.tp_min.src);
max_val = htons(filter->key.tp_max.src);
if (min_mask && max_mask) {
if (htons(key->tp.src) < min_val ||
htons(key->tp.src) > max_val)
return false;
/* skb does not have min and max values */
mkey->tp_min.src = filter->mkey.tp_min.src;
mkey->tp_max.src = filter->mkey.tp_max.src;
}
return true;
}
static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
struct fl_flow_key *mkey)
{
return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
mask->filter_ht_params);
}
static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
struct fl_flow_key *mkey,
struct fl_flow_key *key)
{
struct cls_fl_filter *filter, *f;
list_for_each_entry_rcu(filter, &mask->filters, list) {
if (!fl_range_port_dst_cmp(filter, key, mkey))
continue;
if (!fl_range_port_src_cmp(filter, key, mkey))
continue;
f = __fl_lookup(mask, mkey);
if (f)
return f;
}
return NULL;
}
static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
struct fl_flow_key *mkey,
struct fl_flow_key *key)
{
if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
return fl_lookup_range(mask, mkey, key);
return __fl_lookup(mask, mkey);
}
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_mask *mask;
struct fl_flow_key skb_key;
struct fl_flow_key skb_mkey;
list_for_each_entry_rcu(mask, &head->masks, list) {
fl_clear_masked_range(&skb_key, mask);
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_tunnel_info(skb, &mask->dissector, &skb_key);
skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
fl_set_masked_key(&skb_mkey, &skb_key, mask);
f = fl_lookup(mask, &skb_mkey, &skb_key);
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;
spin_lock_init(&head->masks_lock);
INIT_LIST_HEAD_RCU(&head->masks);
INIT_LIST_HEAD(&head->hw_filters);
rcu_assign_pointer(tp->root, head);
idr_init(&head->handle_idr);
return rhashtable_init(&head->ht, &mask_ht_params);
}
static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done)
{
/* temporary masks don't have their filters list and ht initialized */
if (mask_init_done) {
WARN_ON(!list_empty(&mask->filters));
rhashtable_destroy(&mask->ht);
}
kfree(mask);
}
static void fl_mask_free_work(struct work_struct *work)
{
struct fl_flow_mask *mask = container_of(to_rcu_work(work),
struct fl_flow_mask, rwork);
fl_mask_free(mask, true);
}
static void fl_uninit_mask_free_work(struct work_struct *work)
{
struct fl_flow_mask *mask = container_of(to_rcu_work(work),
struct fl_flow_mask, rwork);
fl_mask_free(mask, false);
}
static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask)
{
if (!refcount_dec_and_test(&mask->refcnt))
return false;
rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
spin_lock(&head->masks_lock);
list_del_rcu(&mask->list);
spin_unlock(&head->masks_lock);
tcf_queue_work(&mask->rwork, fl_mask_free_work);
return true;
}
static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp)
{
/* Flower classifier only changes root pointer during init and destroy.
* Users must obtain reference to tcf_proto instance before calling its
* API, so tp->root pointer is protected from concurrent call to
* fl_destroy() by reference counting.
*/
return rcu_dereference_raw(tp->root);
}
static void __fl_destroy_filter(struct cls_fl_filter *f)
{
tcf_exts_destroy(&f->exts);
tcf_exts_put_net(&f->exts);
kfree(f);
}
static void fl_destroy_filter_work(struct work_struct *work)
{
struct cls_fl_filter *f = container_of(to_rcu_work(work),
struct cls_fl_filter, rwork);
__fl_destroy_filter(f);
}
static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
bool rtnl_held, struct netlink_ext_ack *extack)
{
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = tp->chain->block;
if (!rtnl_held)
rtnl_lock();
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
cls_flower.command = TC_CLSFLOWER_DESTROY;
cls_flower.cookie = (unsigned long) f;
tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
spin_lock(&tp->lock);
list_del_init(&f->hw_list);
tcf_block_offload_dec(block, &f->flags);
spin_unlock(&tp->lock);
if (!rtnl_held)
rtnl_unlock();
}
static int fl_hw_replace_filter(struct tcf_proto *tp,
struct cls_fl_filter *f, bool rtnl_held,
struct netlink_ext_ack *extack)
{
struct cls_fl_head *head = fl_head_dereference(tp);
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = tp->chain->block;
bool skip_sw = tc_skip_sw(f->flags);
int err = 0;
if (!rtnl_held)
rtnl_lock();
cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts));
if (!cls_flower.rule) {
err = -ENOMEM;
goto errout;
}
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
cls_flower.command = TC_CLSFLOWER_REPLACE;
cls_flower.cookie = (unsigned long) f;
cls_flower.rule->match.dissector = &f->mask->dissector;
cls_flower.rule->match.mask = &f->mask->key;
cls_flower.rule->match.key = &f->mkey;
cls_flower.classid = f->res.classid;
err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
if (err) {
kfree(cls_flower.rule);
if (skip_sw)
NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
else
err = 0;
goto errout;
}
err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw);
kfree(cls_flower.rule);
if (err < 0) {
fl_hw_destroy_filter(tp, f, true, NULL);
goto errout;
} else if (err > 0) {
f->in_hw_count = err;
err = 0;
spin_lock(&tp->lock);
tcf_block_offload_inc(block, &f->flags);
spin_unlock(&tp->lock);
}
if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) {
err = -EINVAL;
goto errout;
}
spin_lock(&tp->lock);
list_add(&f->hw_list, &head->hw_filters);
spin_unlock(&tp->lock);
errout:
if (!rtnl_held)
rtnl_unlock();
return err;
}
static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f,
bool rtnl_held)
{
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = tp->chain->block;
if (!rtnl_held)
rtnl_lock();
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
cls_flower.command = TC_CLSFLOWER_STATS;
cls_flower.cookie = (unsigned long) f;
cls_flower.classid = f->res.classid;
tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes,
cls_flower.stats.pkts,
cls_flower.stats.lastused);
if (!rtnl_held)
rtnl_unlock();
}
static void __fl_put(struct cls_fl_filter *f)
{
if (!refcount_dec_and_test(&f->refcnt))
return;
if (tcf_exts_get_net(&f->exts))
tcf_queue_work(&f->rwork, fl_destroy_filter_work);
else
__fl_destroy_filter(f);
}
static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle)
{
struct cls_fl_filter *f;
rcu_read_lock();
f = idr_find(&head->handle_idr, handle);
if (f && !refcount_inc_not_zero(&f->refcnt))
f = NULL;
rcu_read_unlock();
return f;
}
static struct cls_fl_filter *fl_get_next_filter(struct tcf_proto *tp,
unsigned long *handle)
{
struct cls_fl_head *head = fl_head_dereference(tp);
struct cls_fl_filter *f;
rcu_read_lock();
while ((f = idr_get_next_ul(&head->handle_idr, handle))) {
/* don't return filters that are being deleted */
if (refcount_inc_not_zero(&f->refcnt))
break;
++(*handle);
}
rcu_read_unlock();
return f;
}
static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
bool *last, bool rtnl_held,
struct netlink_ext_ack *extack)
{
struct cls_fl_head *head = fl_head_dereference(tp);
*last = false;
spin_lock(&tp->lock);
if (f->deleted) {
spin_unlock(&tp->lock);
return -ENOENT;
}
f->deleted = true;
rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
f->mask->filter_ht_params);
idr_remove(&head->handle_idr, f->handle);
list_del_rcu(&f->list);
spin_unlock(&tp->lock);
*last = fl_mask_put(head, f->mask);
if (!tc_skip_hw(f->flags))
fl_hw_destroy_filter(tp, f, rtnl_held, extack);
tcf_unbind_filter(tp, &f->res);
__fl_put(f);
return 0;
}
static void fl_destroy_sleepable(struct work_struct *work)
{
struct cls_fl_head *head = container_of(to_rcu_work(work),
struct cls_fl_head,
rwork);
rhashtable_destroy(&head->ht);
kfree(head);
module_put(THIS_MODULE);
}
static void fl_destroy(struct tcf_proto *tp, bool rtnl_held,
struct netlink_ext_ack *extack)
{
struct cls_fl_head *head = fl_head_dereference(tp);
struct fl_flow_mask *mask, *next_mask;
struct cls_fl_filter *f, *next;
bool last;
list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
list_for_each_entry_safe(f, next, &mask->filters, list) {
__fl_delete(tp, f, &last, rtnl_held, extack);
if (last)
break;
}
}
idr_destroy(&head->handle_idr);
__module_get(THIS_MODULE);
tcf_queue_work(&head->rwork, fl_destroy_sleepable);
}
static void fl_put(struct tcf_proto *tp, void *arg)
{
struct cls_fl_filter *f = arg;
__fl_put(f);
}
static void *fl_get(struct tcf_proto *tp, u32 handle)
{
struct cls_fl_head *head = fl_head_dereference(tp);
return __fl_get(head, 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 },
[TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED },
[TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED },
};
static const struct nla_policy
enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
[TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
};
static const struct nla_policy
geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
.len = 128 },
};
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_port_range(struct nlattr **tb, struct fl_flow_key *key,
struct fl_flow_key *mask)
{
fl_set_key_val(tb, &key->tp_min.dst,
TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_min.dst,
TCA_FLOWER_UNSPEC, sizeof(key->tp_min.dst));
fl_set_key_val(tb, &key->tp_max.dst,
TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_max.dst,
TCA_FLOWER_UNSPEC, sizeof(key->tp_max.dst));
fl_set_key_val(tb, &key->tp_min.src,
TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_min.src,
TCA_FLOWER_UNSPEC, sizeof(key->tp_min.src));
fl_set_key_val(tb, &key->tp_max.src,
TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_max.src,
TCA_FLOWER_UNSPEC, sizeof(key->tp_max.src));
if ((mask->tp_min.dst && mask->tp_max.dst &&
htons(key->tp_max.dst) <= htons(key->tp_min.dst)) ||
(mask->tp_min.src && mask->tp_max.src &&
htons(key->tp_max.src) <= htons(key->tp_min.src)))
return -EINVAL;
return 0;
}
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,
__be16 ethertype,
int vlan_id_key, int vlan_prio_key,
struct flow_dissector_key_vlan *key_val,
struct flow_dissector_key_vlan *key_mask)
{
#define VLAN_PRIORITY_MASK 0x7
if (tb[vlan_id_key]) {
key_val->vlan_id =
nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
key_mask->vlan_id = VLAN_VID_MASK;
}
if (tb[vlan_prio_key]) {
key_val->vlan_priority =
nla_get_u8(tb[vlan_prio_key]) &
VLAN_PRIORITY_MASK;
key_mask->vlan_priority = VLAN_PRIORITY_MASK;
}
key_val->vlan_tpid = ethertype;
key_mask->vlan_tpid = cpu_to_be16(~0);
}
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);
fl_set_key_flag(key, mask, flags_key, flags_mask,
TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
FLOW_DIS_FIRST_FRAG);
return 0;
}
static void fl_set_key_ip(struct nlattr **tb, bool encap,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
}
static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
int depth, int option_len,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
struct nlattr *class = NULL, *type = NULL, *data = NULL;
struct geneve_opt *opt;
int err, data_len = 0;
if (option_len > sizeof(struct geneve_opt))
data_len = option_len - sizeof(struct geneve_opt);
opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
memset(opt, 0xff, option_len);
opt->length = data_len / 4;
opt->r1 = 0;
opt->r2 = 0;
opt->r3 = 0;
/* If no mask has been prodived we assume an exact match. */
if (!depth)
return sizeof(struct geneve_opt) + data_len;
if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
return -EINVAL;
}
err = nla_parse_nested_deprecated(tb,
TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
nla, geneve_opt_policy, extack);
if (err < 0)
return err;
/* We are not allowed to omit any of CLASS, TYPE or DATA
* fields from the key.
*/
if (!option_len &&
(!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
return -EINVAL;
}
/* Omitting any of CLASS, TYPE or DATA fields is allowed
* for the mask.
*/
if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
int new_len = key->enc_opts.len;
data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
data_len = nla_len(data);
if (data_len < 4) {
NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
return -ERANGE;
}
if (data_len % 4) {
NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
return -ERANGE;
}
new_len += sizeof(struct geneve_opt) + data_len;
BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
return -ERANGE;
}
opt->length = data_len / 4;
memcpy(opt->opt_data, nla_data(data), data_len);
}
if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
opt->opt_class = nla_get_be16(class);
}
if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
opt->type = nla_get_u8(type);
}
return sizeof(struct geneve_opt) + data_len;
}
static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
struct fl_flow_key *mask,
struct netlink_ext_ack *extack)
{
const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
int err, option_len, key_depth, msk_depth = 0;
err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS],
TCA_FLOWER_KEY_ENC_OPTS_MAX,
enc_opts_policy, extack);
if (err)
return err;
nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
TCA_FLOWER_KEY_ENC_OPTS_MAX,
enc_opts_policy, extack);
if (err)
return err;
nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
}
nla_for_each_attr(nla_opt_key, nla_enc_key,
nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
switch (nla_type(nla_opt_key)) {
case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
option_len = 0;
key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
option_len = fl_set_geneve_opt(nla_opt_key, key,
key_depth, option_len,
extack);
if (option_len < 0)
return option_len;
key->enc_opts.len += option_len;
/* At the same time we need to parse through the mask
* in order to verify exact and mask attribute lengths.
*/
mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
option_len = fl_set_geneve_opt(nla_opt_msk, mask,
msk_depth, option_len,
extack);
if (option_len < 0)
return option_len;
mask->enc_opts.len += option_len;
if (key->enc_opts.len != mask->enc_opts.len) {
NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
return -EINVAL;
}
if (msk_depth)
nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
break;
default:
NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
return -EINVAL;
}
}
return 0;
}
static int fl_set_key(struct net *net, struct nlattr **tb,
struct fl_flow_key *key, struct fl_flow_key *mask,
struct netlink_ext_ack *extack)
{
__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], extack);
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 (eth_type_vlan(ethertype)) {
fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
&mask->vlan);
if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
if (eth_type_vlan(ethertype)) {
fl_set_key_vlan(tb, ethertype,
TCA_FLOWER_KEY_CVLAN_ID,
TCA_FLOWER_KEY_CVLAN_PRIO,
&key->cvlan, &mask->cvlan);
fl_set_key_val(tb, &key->basic.n_proto,
TCA_FLOWER_KEY_CVLAN_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);
}
}
} 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, false, &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 (key->basic.ip_proto == IPPROTO_TCP ||
key->basic.ip_proto == IPPROTO_UDP ||
key->basic.ip_proto == IPPROTO_SCTP) {
ret = fl_set_key_port_range(tb, key, mask);
if (ret)
return ret;
}
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));
fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
ret = fl_set_enc_opt(tb, key, mask, extack);
if (ret)
return ret;
}
if (tb[TCA_FLOWER_KEY_FLAGS])
ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
return ret;
}
static void fl_mask_copy(struct fl_flow_mask *dst,
struct fl_flow_mask *src)
{
const void *psrc = fl_key_get_start(&src->key, src);
void *pdst = fl_key_get_start(&dst->key, src);
memcpy(pdst, psrc, fl_mask_range(src));
dst->range = src->range;
}
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_mask_hashtable(struct fl_flow_mask *mask)
{
mask->filter_ht_params = fl_ht_params;
mask->filter_ht_params.key_len = fl_mask_range(mask);
mask->filter_ht_params.key_offset += mask->range.start;
return rhashtable_init(&mask->ht, &mask->filter_ht_params);
}
#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
#define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, 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 flow_dissector *dissector,
struct fl_flow_key *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, keys, cnt,
FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
if (FL_KEY_IS_MASKED(mask, tp) ||
FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max))
FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_IP, ip);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_TCP, tcp);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ICMP, icmp);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ARP, arp);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_MPLS, mpls);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_VLAN, vlan);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_CVLAN, cvlan);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
FL_KEY_IS_MASKED(mask, enc_ipv6))
FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
enc_control);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
FL_KEY_SET_IF_MASKED(mask, keys, cnt,
FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
skb_flow_dissector_init(dissector, keys, cnt);
}
static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
struct fl_flow_mask *mask)
{
struct fl_flow_mask *newmask;
int err;
newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
if (!newmask)
return ERR_PTR(-ENOMEM);
fl_mask_copy(newmask, mask);
if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) ||
(newmask->key.tp_min.src && newmask->key.tp_max.src))
newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
err = fl_init_mask_hashtable(newmask);
if (err)
goto errout_free;
fl_init_dissector(&newmask->dissector, &newmask->key);
INIT_LIST_HEAD_RCU(&newmask->filters);
refcount_set(&newmask->refcnt, 1);
err = rhashtable_replace_fast(&head->ht, &mask->ht_node,
&newmask->ht_node, mask_ht_params);
if (err)
goto errout_destroy;
spin_lock(&head->masks_lock);
list_add_tail_rcu(&newmask->list, &head->masks);
spin_unlock(&head->masks_lock);
return newmask;
errout_destroy:
rhashtable_destroy(&newmask->ht);
errout_free:
kfree(newmask);
return ERR_PTR(err);
}
static int fl_check_assign_mask(struct cls_fl_head *head,
struct cls_fl_filter *fnew,
struct cls_fl_filter *fold,
struct fl_flow_mask *mask)
{
struct fl_flow_mask *newmask;
int ret = 0;
rcu_read_lock();
/* Insert mask as temporary node to prevent concurrent creation of mask
* with same key. Any concurrent lookups with same key will return
* -EAGAIN because mask's refcnt is zero.
*/
fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht,
&mask->ht_node,
mask_ht_params);
if (!fnew->mask) {
rcu_read_unlock();
if (fold) {
ret = -EINVAL;
goto errout_cleanup;
}
newmask = fl_create_new_mask(head, mask);
if (IS_ERR(newmask)) {
ret = PTR_ERR(newmask);
goto errout_cleanup;
}
fnew->mask = newmask;
return 0;
} else if (IS_ERR(fnew->mask)) {
ret = PTR_ERR(fnew->mask);
} else if (fold && fold->mask != fnew->mask) {
ret = -EINVAL;
} else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) {
/* Mask was deleted concurrently, try again */
ret = -EAGAIN;
}
rcu_read_unlock();
return ret;
errout_cleanup:
rhashtable_remove_fast(&head->ht, &mask->ht_node,
mask_ht_params);
return ret;
}
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,
struct fl_flow_tmplt *tmplt, bool rtnl_held,
struct netlink_ext_ack *extack)
{
int err;
err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held,
extack);
if (err < 0)
return err;
if (tb[TCA_FLOWER_CLASSID]) {
f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
if (!rtnl_held)
rtnl_lock();
tcf_bind_filter(tp, &f->res, base);
if (!rtnl_held)
rtnl_unlock();
}
err = fl_set_key(net, tb, &f->key, &mask->key, extack);
if (err)
return err;
fl_mask_update_range(mask);
fl_set_masked_key(&f->mkey, &f->key, mask);
if (!fl_mask_fits_tmplt(tmplt, mask)) {
NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
return -EINVAL;
}
return 0;
}
static int fl_ht_insert_unique(struct cls_fl_filter *fnew,
struct cls_fl_filter *fold,
bool *in_ht)
{
struct fl_flow_mask *mask = fnew->mask;
int err;
err = rhashtable_lookup_insert_fast(&mask->ht,
&fnew->ht_node,
mask->filter_ht_params);
if (err) {
*in_ht = false;
/* It is okay if filter with same key exists when
* overwriting.
*/
return fold && err == -EEXIST ? 0 : err;
}
*in_ht = true;
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, bool rtnl_held,
struct netlink_ext_ack *extack)
{
struct cls_fl_head *head = fl_head_dereference(tp);
struct cls_fl_filter *fold = *arg;
struct cls_fl_filter *fnew;
struct fl_flow_mask *mask;
struct nlattr **tb;
bool in_ht;
int err;
if (!tca[TCA_OPTIONS]) {
err = -EINVAL;
goto errout_fold;
}
mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
if (!mask) {
err = -ENOBUFS;
goto errout_fold;
}
tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
if (!tb) {
err = -ENOBUFS;
goto errout_mask_alloc;
}
err = nla_parse_nested_deprecated(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;
}
INIT_LIST_HEAD(&fnew->hw_list);
refcount_set(&fnew->refcnt, 1);
err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0);
if (err < 0)
goto errout;
if (tb[TCA_FLOWER_FLAGS]) {
fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
if (!tc_flags_valid(fnew->flags)) {
err = -EINVAL;
goto errout;
}
}
err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
tp->chain->tmplt_priv, rtnl_held, extack);
if (err)
goto errout;
err = fl_check_assign_mask(head, fnew, fold, mask);
if (err)
goto errout;
err = fl_ht_insert_unique(fnew, fold, &in_ht);
if (err)
goto errout_mask;
if (!tc_skip_hw(fnew->flags)) {
err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack);
if (err)
goto errout_ht;
}
if (!tc_in_hw(fnew->flags))
fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
spin_lock(&tp->lock);
/* tp was deleted concurrently. -EAGAIN will cause caller to lookup
* proto again or create new one, if necessary.
*/
if (tp->deleting) {
err = -EAGAIN;
goto errout_hw;
}
if (fold) {
/* Fold filter was deleted concurrently. Retry lookup. */
if (fold->deleted) {
err = -EAGAIN;
goto errout_hw;
}
fnew->handle = handle;
if (!in_ht) {
struct rhashtable_params params =
fnew->mask->filter_ht_params;
err = rhashtable_insert_fast(&fnew->mask->ht,
&fnew->ht_node,
params);
if (err)
goto errout_hw;
in_ht = true;
}
refcount_inc(&fnew->refcnt);
rhashtable_remove_fast(&fold->mask->ht,
&fold->ht_node,
fold->mask->filter_ht_params);
idr_replace(&head->handle_idr, fnew, fnew->handle);
list_replace_rcu(&fold->list, &fnew->list);
fold->deleted = true;
spin_unlock(&tp->lock);
fl_mask_put(head, fold->mask);
if (!tc_skip_hw(fold->flags))
fl_hw_destroy_filter(tp, fold, rtnl_held, NULL);
tcf_unbind_filter(tp, &fold->res);
/* Caller holds reference to fold, so refcnt is always > 0
* after this.
*/
refcount_dec(&fold->refcnt);
__fl_put(fold);
} else {
if (handle) {
/* user specifies a handle and it doesn't exist */
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
handle, GFP_ATOMIC);
/* Filter with specified handle was concurrently
* inserted after initial check in cls_api. This is not
* necessarily an error if NLM_F_EXCL is not set in
* message flags. Returning EAGAIN will cause cls_api to
* try to update concurrently inserted rule.
*/
if (err == -ENOSPC)
err = -EAGAIN;
} else {
handle = 1;
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
INT_MAX, GFP_ATOMIC);
}
if (err)
goto errout_hw;
refcount_inc(&fnew->refcnt);
fnew->handle = handle;
list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
spin_unlock(&tp->lock);
}
*arg = fnew;
kfree(tb);
tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
return 0;
errout_ht:
spin_lock(&tp->lock);
errout_hw:
fnew->deleted = true;
spin_unlock(&tp->lock);
if (!tc_skip_hw(fnew->flags))
fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL);
if (in_ht)
rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node,
fnew->mask->filter_ht_params);
errout_mask:
fl_mask_put(head, fnew->mask);
errout:
__fl_put(fnew);
errout_tb:
kfree(tb);
errout_mask_alloc:
tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work);
errout_fold:
if (fold)
__fl_put(fold);
return err;
}
static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
bool rtnl_held, struct netlink_ext_ack *extack)
{
struct cls_fl_head *head = fl_head_dereference(tp);
struct cls_fl_filter *f = arg;
bool last_on_mask;
int err = 0;
err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack);
*last = list_empty(&head->masks);
__fl_put(f);
return err;
}
static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg,
bool rtnl_held)
{
struct cls_fl_filter *f;
arg->count = arg->skip;
while ((f = fl_get_next_filter(tp, &arg->cookie)) != NULL) {
if (arg->fn(tp, f, arg) < 0) {
__fl_put(f);
arg->stop = 1;
break;
}
__fl_put(f);
arg->cookie++;
arg->count++;
}
}
static struct cls_fl_filter *
fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add)
{
struct cls_fl_head *head = fl_head_dereference(tp);
spin_lock(&tp->lock);
if (list_empty(&head->hw_filters)) {
spin_unlock(&tp->lock);
return NULL;
}
if (!f)
f = list_entry(&head->hw_filters, struct cls_fl_filter,
hw_list);
list_for_each_entry_continue(f, &head->hw_filters, hw_list) {
if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) {
spin_unlock(&tp->lock);
return f;
}
}
spin_unlock(&tp->lock);
return NULL;
}
static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
void *cb_priv, struct netlink_ext_ack *extack)
{
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = tp->chain->block;
struct cls_fl_filter *f = NULL;
int err;
/* hw_filters list can only be changed by hw offload functions after
* obtaining rtnl lock. Make sure it is not changed while reoffload is
* iterating it.
*/
ASSERT_RTNL();
while ((f = fl_get_next_hw_filter(tp, f, add))) {
cls_flower.rule =
flow_rule_alloc(tcf_exts_num_actions(&f->exts));
if (!cls_flower.rule) {
__fl_put(f);
return -ENOMEM;
}
tc_cls_common_offload_init(&cls_flower.common, tp, f->flags,
extack);
cls_flower.command = add ?
TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY;
cls_flower.cookie = (unsigned long)f;
cls_flower.rule->match.dissector = &f->mask->dissector;
cls_flower.rule->match.mask = &f->mask->key;
cls_flower.rule->match.key = &f->mkey;
err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
if (err) {
kfree(cls_flower.rule);
if (tc_skip_sw(f->flags)) {
NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
__fl_put(f);
return err;
}
goto next_flow;
}
cls_flower.classid = f->res.classid;
err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
kfree(cls_flower.rule);
if (err) {
if (add && tc_skip_sw(f->flags)) {
__fl_put(f);
return err;
}
goto next_flow;
}
spin_lock(&tp->lock);
tc_cls_offload_cnt_update(block, &f->in_hw_count, &f->flags,
add);
spin_unlock(&tp->lock);
next_flow:
__fl_put(f);
}
return 0;
}
static int fl_hw_create_tmplt(struct tcf_chain *chain,
struct fl_flow_tmplt *tmplt)
{
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = chain->block;
cls_flower.rule = flow_rule_alloc(0);
if (!cls_flower.rule)
return -ENOMEM;
cls_flower.common.chain_index = chain->index;
cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE;
cls_flower.cookie = (unsigned long) tmplt;
cls_flower.rule->match.dissector = &tmplt->dissector;
cls_flower.rule->match.mask = &tmplt->mask;
cls_flower.rule->match.key = &tmplt->dummy_key;
/* We don't care if driver (any of them) fails to handle this
* call. It serves just as a hint for it.
*/
tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
kfree(cls_flower.rule);
return 0;
}
static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
struct fl_flow_tmplt *tmplt)
{
struct tc_cls_flower_offload cls_flower = {};
struct tcf_block *block = chain->block;
cls_flower.common.chain_index = chain->index;
cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY;
cls_flower.cookie = (unsigned long) tmplt;
tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
}
static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
struct nlattr **tca,
struct netlink_ext_ack *extack)
{
struct fl_flow_tmplt *tmplt;
struct nlattr **tb;
int err;
if (!tca[TCA_OPTIONS])
return ERR_PTR(-EINVAL);
tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
if (!tb)
return ERR_PTR(-ENOBUFS);
err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX,
tca[TCA_OPTIONS], fl_policy, NULL);
if (err)
goto errout_tb;
tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
if (!tmplt) {
err = -ENOMEM;
goto errout_tb;
}
tmplt->chain = chain;
err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
if (err)
goto errout_tmplt;
fl_init_dissector(&tmplt->dissector, &tmplt->mask);
err = fl_hw_create_tmplt(chain, tmplt);
if (err)
goto errout_tmplt;
kfree(tb);
return tmplt;
errout_tmplt:
kfree(tmplt);
errout_tb:
kfree(tb);
return ERR_PTR(err);
}
static void fl_tmplt_destroy(void *tmplt_priv)
{
struct fl_flow_tmplt *tmplt = tmplt_priv;
fl_hw_destroy_tmplt(tmplt->chain, tmplt);
kfree(tmplt);
}
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_port_range(struct sk_buff *skb, struct fl_flow_key *key,
struct fl_flow_key *mask)
{
if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN,
&mask->tp_min.dst, TCA_FLOWER_UNSPEC,
sizeof(key->tp_min.dst)) ||
fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX,
&mask->tp_max.dst, TCA_FLOWER_UNSPEC,
sizeof(key->tp_max.dst)) ||
fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN,
&mask->tp_min.src, TCA_FLOWER_UNSPEC,
sizeof(key->tp_min.src)) ||
fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX,
&mask->tp_max.src, TCA_FLOWER_UNSPEC,
sizeof(key->tp_max.src)))
return -1;
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, bool encap,
struct flow_dissector_key_ip *key,
struct flow_dissector_key_ip *mask)
{
int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
return -1;
return 0;
}
static int fl_dump_key_vlan(struct sk_buff *skb,
int vlan_id_key, int vlan_prio_key,
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, vlan_id_key,
vlan_key->vlan_id);
if (err)
return err;
}
if (vlan_mask->vlan_priority) {
err = nla_put_u8(skb, vlan_prio_key,
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);
fl_get_key_flag(flags_key, flags_mask, &key, &mask,
TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
FLOW_DIS_FIRST_FRAG);
_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_key_geneve_opt(struct sk_buff *skb,
struct flow_dissector_key_enc_opts *enc_opts)
{
struct geneve_opt *opt;
struct nlattr *nest;
int opt_off = 0;
nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
if (!nest)
goto nla_put_failure;
while (enc_opts->len > opt_off) {
opt = (struct geneve_opt *)&enc_opts->data[opt_off];
if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
opt->opt_class))
goto nla_put_failure;
if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
opt->type))
goto nla_put_failure;
if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
opt->length * 4, opt->opt_data))
goto nla_put_failure;
opt_off += sizeof(struct geneve_opt) + opt->length * 4;
}
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -EMSGSIZE;
}
static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
struct flow_dissector_key_enc_opts *enc_opts)
{
struct nlattr *nest;
int err;
if (!enc_opts->len)
return 0;
nest = nla_nest_start_noflag(skb, enc_opt_type);
if (!nest)
goto nla_put_failure;
switch (enc_opts->dst_opt_type) {
case TUNNEL_GENEVE_OPT:
err = fl_dump_key_geneve_opt(skb, enc_opts);
if (err)
goto nla_put_failure;
break;
default:
goto nla_put_failure;
}
nla_nest_end(skb, nest);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -EMSGSIZE;
}
static int fl_dump_key_enc_opt(struct sk_buff *skb,
struct flow_dissector_key_enc_opts *key_opts,
struct flow_dissector_key_enc_opts *msk_opts)
{
int err;
err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
if (err)
return err;
return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
}
static int fl_dump_key(struct sk_buff *skb, struct net *net,
struct fl_flow_key *key, struct fl_flow_key *mask)
{
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 (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, TCA_FLOWER_KEY_VLAN_ID,
TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
goto nla_put_failure;
if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
TCA_FLOWER_KEY_CVLAN_PRIO,
&key->cvlan, &mask->cvlan) ||
(mask->cvlan.vlan_tpid &&
nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
key->cvlan.vlan_tpid)))
goto nla_put_failure;
if (mask->basic.n_proto) {
if (mask->cvlan.vlan_tpid) {
if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
key->basic.n_proto))
goto nla_put_failure;
} else if (mask->vlan.vlan_tpid) {
if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
key->basic.n_proto))
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, false, &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->basic.ip_proto == IPPROTO_TCP ||
key->basic.ip_proto == IPPROTO_UDP ||
key->basic.ip_proto == IPPROTO_SCTP) &&
fl_dump_key_port_range(skb, key, mask))
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)) ||
fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
goto nla_put_failure;
if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
{
struct cls_fl_filter *f = fh;
struct nlattr *nest;
struct fl_flow_key *key, *mask;
bool skip_hw;
if (!f)
return skb->len;
t->tcm_handle = f->handle;
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (!nest)
goto nla_put_failure;
spin_lock(&tp->lock);
if (f->res.classid &&
nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
goto nla_put_failure_locked;
key = &f->key;
mask = &f->mask->key;
skip_hw = tc_skip_hw(f->flags);
if (fl_dump_key(skb, net, key, mask))
goto nla_put_failure_locked;
if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
goto nla_put_failure_locked;
spin_unlock(&tp->lock);
if (!skip_hw)
fl_hw_update_stats(tp, f, rtnl_held);
if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
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_locked:
spin_unlock(&tp->lock);
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
}
static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
{
struct fl_flow_tmplt *tmplt = tmplt_priv;
struct fl_flow_key *key, *mask;
struct nlattr *nest;
nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
if (!nest)
goto nla_put_failure;
key = &tmplt->dummy_key;
mask = &tmplt->mask;
if (fl_dump_key(skb, net, key, mask))
goto nla_put_failure;
nla_nest_end(skb, nest);
return skb->len;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -EMSGSIZE;
}
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,
.put = fl_put,
.change = fl_change,
.delete = fl_delete,
.walk = fl_walk,
.reoffload = fl_reoffload,
.dump = fl_dump,
.bind_class = fl_bind_class,
.tmplt_create = fl_tmplt_create,
.tmplt_destroy = fl_tmplt_destroy,
.tmplt_dump = fl_tmplt_dump,
.owner = THIS_MODULE,
.flags = TCF_PROTO_OPS_DOIT_UNLOCKED,
};
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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