![Paul Blakey](/assets/img/avatar_default.png)
We incorrectly compare the mask and the result is that we can't modify
an already existing rule.
Fix that by comparing correctly.
Fixes: 05cd271fd6
("cls_flower: Support multiple masks per priority")
Reported-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1449 lines
43 KiB
C
1449 lines
43 KiB
C
/*
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* net/sched/cls_flower.c Flower classifier
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*
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* Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/rhashtable.h>
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#include <linux/workqueue.h>
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#include <linux/if_ether.h>
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#include <linux/in6.h>
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#include <linux/ip.h>
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#include <linux/mpls.h>
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#include <net/sch_generic.h>
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#include <net/pkt_cls.h>
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#include <net/ip.h>
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#include <net/flow_dissector.h>
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#include <net/dst.h>
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#include <net/dst_metadata.h>
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struct fl_flow_key {
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int indev_ifindex;
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struct flow_dissector_key_control control;
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struct flow_dissector_key_control enc_control;
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struct flow_dissector_key_basic basic;
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struct flow_dissector_key_eth_addrs eth;
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struct flow_dissector_key_vlan vlan;
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union {
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struct flow_dissector_key_ipv4_addrs ipv4;
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struct flow_dissector_key_ipv6_addrs ipv6;
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};
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struct flow_dissector_key_ports tp;
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struct flow_dissector_key_icmp icmp;
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struct flow_dissector_key_arp arp;
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struct flow_dissector_key_keyid enc_key_id;
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union {
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struct flow_dissector_key_ipv4_addrs enc_ipv4;
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struct flow_dissector_key_ipv6_addrs enc_ipv6;
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};
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struct flow_dissector_key_ports enc_tp;
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struct flow_dissector_key_mpls mpls;
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struct flow_dissector_key_tcp tcp;
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struct flow_dissector_key_ip ip;
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} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
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struct fl_flow_mask_range {
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unsigned short int start;
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unsigned short int end;
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};
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struct fl_flow_mask {
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struct fl_flow_key key;
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struct fl_flow_mask_range range;
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struct rhash_head ht_node;
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struct rhashtable ht;
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struct rhashtable_params filter_ht_params;
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struct flow_dissector dissector;
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struct list_head filters;
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struct rcu_head rcu;
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struct list_head list;
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};
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struct cls_fl_head {
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struct rhashtable ht;
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struct list_head masks;
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struct rcu_work rwork;
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struct idr handle_idr;
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};
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struct cls_fl_filter {
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struct fl_flow_mask *mask;
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struct rhash_head ht_node;
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struct fl_flow_key mkey;
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struct tcf_exts exts;
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struct tcf_result res;
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struct fl_flow_key key;
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struct list_head list;
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u32 handle;
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u32 flags;
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struct rcu_work rwork;
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struct net_device *hw_dev;
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};
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static const struct rhashtable_params mask_ht_params = {
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.key_offset = offsetof(struct fl_flow_mask, key),
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.key_len = sizeof(struct fl_flow_key),
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.head_offset = offsetof(struct fl_flow_mask, ht_node),
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.automatic_shrinking = true,
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};
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static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
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{
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return mask->range.end - mask->range.start;
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}
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static void fl_mask_update_range(struct fl_flow_mask *mask)
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{
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const u8 *bytes = (const u8 *) &mask->key;
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size_t size = sizeof(mask->key);
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size_t i, first = 0, last;
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for (i = 0; i < size; i++) {
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if (bytes[i]) {
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first = i;
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break;
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}
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}
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last = first;
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for (i = size - 1; i != first; i--) {
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if (bytes[i]) {
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last = i;
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break;
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}
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}
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mask->range.start = rounddown(first, sizeof(long));
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mask->range.end = roundup(last + 1, sizeof(long));
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}
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static void *fl_key_get_start(struct fl_flow_key *key,
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const struct fl_flow_mask *mask)
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{
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return (u8 *) key + mask->range.start;
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}
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static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
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struct fl_flow_mask *mask)
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{
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const long *lkey = fl_key_get_start(key, mask);
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const long *lmask = fl_key_get_start(&mask->key, mask);
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long *lmkey = fl_key_get_start(mkey, mask);
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int i;
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for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
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*lmkey++ = *lkey++ & *lmask++;
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}
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static void fl_clear_masked_range(struct fl_flow_key *key,
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struct fl_flow_mask *mask)
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{
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memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
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}
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static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
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struct fl_flow_key *mkey)
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{
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return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
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mask->filter_ht_params);
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}
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static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
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struct tcf_result *res)
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{
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struct cls_fl_head *head = rcu_dereference_bh(tp->root);
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struct cls_fl_filter *f;
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struct fl_flow_mask *mask;
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struct fl_flow_key skb_key;
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struct fl_flow_key skb_mkey;
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list_for_each_entry_rcu(mask, &head->masks, list) {
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fl_clear_masked_range(&skb_key, mask);
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skb_key.indev_ifindex = skb->skb_iif;
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/* skb_flow_dissect() does not set n_proto in case an unknown
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* protocol, so do it rather here.
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*/
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skb_key.basic.n_proto = skb->protocol;
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skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
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skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
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fl_set_masked_key(&skb_mkey, &skb_key, mask);
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f = fl_lookup(mask, &skb_mkey);
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if (f && !tc_skip_sw(f->flags)) {
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*res = f->res;
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return tcf_exts_exec(skb, &f->exts, res);
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}
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}
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return -1;
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}
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static int fl_init(struct tcf_proto *tp)
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{
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struct cls_fl_head *head;
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head = kzalloc(sizeof(*head), GFP_KERNEL);
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if (!head)
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return -ENOBUFS;
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INIT_LIST_HEAD_RCU(&head->masks);
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rcu_assign_pointer(tp->root, head);
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idr_init(&head->handle_idr);
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return rhashtable_init(&head->ht, &mask_ht_params);
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}
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static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
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bool async)
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{
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if (!list_empty(&mask->filters))
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return false;
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rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
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rhashtable_destroy(&mask->ht);
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list_del_rcu(&mask->list);
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if (async)
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kfree_rcu(mask, rcu);
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else
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kfree(mask);
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return true;
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}
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static void __fl_destroy_filter(struct cls_fl_filter *f)
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{
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tcf_exts_destroy(&f->exts);
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tcf_exts_put_net(&f->exts);
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kfree(f);
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}
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static void fl_destroy_filter_work(struct work_struct *work)
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{
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struct cls_fl_filter *f = container_of(to_rcu_work(work),
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struct cls_fl_filter, rwork);
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rtnl_lock();
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__fl_destroy_filter(f);
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rtnl_unlock();
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}
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static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
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struct netlink_ext_ack *extack)
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{
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struct tc_cls_flower_offload cls_flower = {};
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struct tcf_block *block = tp->chain->block;
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tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
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cls_flower.command = TC_CLSFLOWER_DESTROY;
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cls_flower.cookie = (unsigned long) f;
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tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
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&cls_flower, false);
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tcf_block_offload_dec(block, &f->flags);
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}
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static int fl_hw_replace_filter(struct tcf_proto *tp,
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struct cls_fl_filter *f,
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struct netlink_ext_ack *extack)
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{
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struct tc_cls_flower_offload cls_flower = {};
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struct tcf_block *block = tp->chain->block;
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bool skip_sw = tc_skip_sw(f->flags);
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int err;
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tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
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cls_flower.command = TC_CLSFLOWER_REPLACE;
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cls_flower.cookie = (unsigned long) f;
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cls_flower.dissector = &f->mask->dissector;
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cls_flower.mask = &f->mask->key;
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cls_flower.key = &f->mkey;
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cls_flower.exts = &f->exts;
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cls_flower.classid = f->res.classid;
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err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
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&cls_flower, skip_sw);
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if (err < 0) {
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fl_hw_destroy_filter(tp, f, NULL);
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return err;
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} else if (err > 0) {
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tcf_block_offload_inc(block, &f->flags);
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}
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if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
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return -EINVAL;
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return 0;
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}
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static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
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{
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struct tc_cls_flower_offload cls_flower = {};
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struct tcf_block *block = tp->chain->block;
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tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
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cls_flower.command = TC_CLSFLOWER_STATS;
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cls_flower.cookie = (unsigned long) f;
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cls_flower.exts = &f->exts;
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cls_flower.classid = f->res.classid;
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tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
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&cls_flower, false);
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}
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static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
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struct netlink_ext_ack *extack)
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{
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struct cls_fl_head *head = rtnl_dereference(tp->root);
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bool async = tcf_exts_get_net(&f->exts);
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bool last;
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idr_remove(&head->handle_idr, f->handle);
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list_del_rcu(&f->list);
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last = fl_mask_put(head, f->mask, async);
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if (!tc_skip_hw(f->flags))
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fl_hw_destroy_filter(tp, f, extack);
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tcf_unbind_filter(tp, &f->res);
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if (async)
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tcf_queue_work(&f->rwork, fl_destroy_filter_work);
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else
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__fl_destroy_filter(f);
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return last;
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}
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static void fl_destroy_sleepable(struct work_struct *work)
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{
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struct cls_fl_head *head = container_of(to_rcu_work(work),
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struct cls_fl_head,
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rwork);
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rhashtable_destroy(&head->ht);
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kfree(head);
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module_put(THIS_MODULE);
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}
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static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
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{
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struct cls_fl_head *head = rtnl_dereference(tp->root);
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struct fl_flow_mask *mask, *next_mask;
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struct cls_fl_filter *f, *next;
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list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
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list_for_each_entry_safe(f, next, &mask->filters, list) {
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if (__fl_delete(tp, f, extack))
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break;
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}
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}
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idr_destroy(&head->handle_idr);
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__module_get(THIS_MODULE);
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tcf_queue_work(&head->rwork, fl_destroy_sleepable);
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}
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static void *fl_get(struct tcf_proto *tp, u32 handle)
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{
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struct cls_fl_head *head = rtnl_dereference(tp->root);
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return idr_find(&head->handle_idr, handle);
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}
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static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
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[TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
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[TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
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[TCA_FLOWER_INDEV] = { .type = NLA_STRING,
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.len = IFNAMSIZ },
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[TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
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[TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
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[TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
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[TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
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[TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
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[TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 },
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[TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 },
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[TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
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[TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 },
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[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);
|
|
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,
|
|
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,
|
|
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 (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 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) (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 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(&mask->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);
|
|
|
|
err = fl_init_mask_hashtable(newmask);
|
|
if (err)
|
|
goto errout_free;
|
|
|
|
fl_init_dissector(newmask);
|
|
|
|
INIT_LIST_HEAD_RCU(&newmask->filters);
|
|
|
|
err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
|
|
mask_ht_params);
|
|
if (err)
|
|
goto errout_destroy;
|
|
|
|
list_add_tail_rcu(&newmask->list, &head->masks);
|
|
|
|
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;
|
|
|
|
fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
|
|
if (!fnew->mask) {
|
|
if (fold)
|
|
return -EINVAL;
|
|
|
|
newmask = fl_create_new_mask(head, mask);
|
|
if (IS_ERR(newmask))
|
|
return PTR_ERR(newmask);
|
|
|
|
fnew->mask = newmask;
|
|
} else if (fold && fold->mask != fnew->mask) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
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,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int err;
|
|
|
|
err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
|
|
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, extack);
|
|
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 netlink_ext_ack *extack)
|
|
{
|
|
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 = {};
|
|
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) {
|
|
handle = 1;
|
|
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
|
|
INT_MAX, GFP_KERNEL);
|
|
} else if (!fold) {
|
|
/* user specifies a handle and it doesn't exist */
|
|
err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
|
|
handle, GFP_KERNEL);
|
|
}
|
|
if (err)
|
|
goto errout;
|
|
fnew->handle = handle;
|
|
|
|
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,
|
|
extack);
|
|
if (err)
|
|
goto errout_idr;
|
|
|
|
err = fl_check_assign_mask(head, fnew, fold, &mask);
|
|
if (err)
|
|
goto errout_idr;
|
|
|
|
if (!tc_skip_sw(fnew->flags)) {
|
|
if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) {
|
|
err = -EEXIST;
|
|
goto errout_mask;
|
|
}
|
|
|
|
err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
|
|
fnew->mask->filter_ht_params);
|
|
if (err)
|
|
goto errout_mask;
|
|
}
|
|
|
|
if (!tc_skip_hw(fnew->flags)) {
|
|
err = fl_hw_replace_filter(tp, fnew, extack);
|
|
if (err)
|
|
goto errout_mask;
|
|
}
|
|
|
|
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(&fold->mask->ht,
|
|
&fold->ht_node,
|
|
fold->mask->filter_ht_params);
|
|
if (!tc_skip_hw(fold->flags))
|
|
fl_hw_destroy_filter(tp, fold, NULL);
|
|
}
|
|
|
|
*arg = fnew;
|
|
|
|
if (fold) {
|
|
idr_replace(&head->handle_idr, fnew, fnew->handle);
|
|
list_replace_rcu(&fold->list, &fnew->list);
|
|
tcf_unbind_filter(tp, &fold->res);
|
|
tcf_exts_get_net(&fold->exts);
|
|
tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
|
|
} else {
|
|
list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
|
|
}
|
|
|
|
kfree(tb);
|
|
return 0;
|
|
|
|
errout_mask:
|
|
fl_mask_put(head, fnew->mask, false);
|
|
|
|
errout_idr:
|
|
if (!fold)
|
|
idr_remove(&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 netlink_ext_ack *extack)
|
|
{
|
|
struct cls_fl_head *head = rtnl_dereference(tp->root);
|
|
struct cls_fl_filter *f = arg;
|
|
|
|
if (!tc_skip_sw(f->flags))
|
|
rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
|
|
f->mask->filter_ht_params);
|
|
__fl_delete(tp, f, extack);
|
|
*last = list_empty(&head->masks);
|
|
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;
|
|
struct fl_flow_mask *mask;
|
|
|
|
list_for_each_entry_rcu(mask, &head->masks, list) {
|
|
list_for_each_entry_rcu(f, &mask->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);
|
|
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(struct net *net, struct tcf_proto *tp, void *fh,
|
|
struct sk_buff *skb, struct tcmsg *t)
|
|
{
|
|
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 = &f->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");
|