| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Pirko | 5161 | 25.25% | 13 | 6.60% |
| Guillaume Nault | 2372 | 11.61% | 6 | 3.05% |
| Pieter Jansen van Vuuren | 1949 | 9.54% | 2 | 1.02% |
| Vlad Buslov | 1412 | 6.91% | 32 | 16.24% |
| Paul Blakey | 1303 | 6.38% | 12 | 6.09% |
| Xin Long | 1287 | 6.30% | 4 | 2.03% |
| Wojciech Drewek | 988 | 4.83% | 3 | 1.52% |
| Amritha Nambiar | 777 | 3.80% | 2 | 1.02% |
| Or Gerlitz | 538 | 2.63% | 7 | 3.55% |
| Zahari Doychev | 489 | 2.39% | 1 | 0.51% |
| Amir Vadai | 448 | 2.19% | 5 | 2.54% |
| Simon Horman | 445 | 2.18% | 4 | 2.03% |
| Hadar Hen Zion | 399 | 1.95% | 8 | 4.06% |
| Ido Schimmel | 333 | 1.63% | 5 | 2.54% |
| Benjamin LaHaise | 274 | 1.34% | 2 | 1.02% |
| Américo Wang | 210 | 1.03% | 11 | 5.58% |
| Victor Nogueira | 206 | 1.01% | 1 | 0.51% |
| Ratheesh Kannoth | 204 | 1.00% | 1 | 0.51% |
| wenxu | 194 | 0.95% | 4 | 2.03% |
| Boris Sukholitko | 191 | 0.93% | 3 | 1.52% |
| Pablo Neira Ayuso | 187 | 0.92% | 5 | 2.54% |
| Jianbo Liu | 169 | 0.83% | 6 | 3.05% |
| Ariel Levkovich | 104 | 0.51% | 1 | 0.51% |
| Yoshiki Komachi | 101 | 0.49% | 2 | 1.02% |
| John Hurley | 75 | 0.37% | 3 | 1.52% |
| Arnd Bergmann | 66 | 0.32% | 2 | 1.02% |
| Chris Mi | 64 | 0.31% | 1 | 0.51% |
| Jakub Kiciński | 60 | 0.29% | 4 | 2.03% |
| Paolo Abeni | 57 | 0.28% | 1 | 0.51% |
| Davide Caratti | 45 | 0.22% | 2 | 1.02% |
| Daniel Borkmann | 42 | 0.21% | 2 | 1.02% |
| Johannes Berg | 39 | 0.19% | 3 | 1.52% |
| Ivan Vecera | 36 | 0.18% | 1 | 0.51% |
| Tom Herbert | 28 | 0.14% | 3 | 1.52% |
| Roi Dayan | 22 | 0.11% | 1 | 0.51% |
| Vladimir Oltean | 20 | 0.10% | 2 | 1.02% |
| Eric Dumazet | 17 | 0.08% | 2 | 1.02% |
| Hangyu Hua | 16 | 0.08% | 1 | 0.51% |
| Quentin Monnet | 15 | 0.07% | 2 | 1.02% |
| Jason Baron | 13 | 0.06% | 1 | 0.51% |
| Alexander Aring | 11 | 0.05% | 4 | 2.03% |
| Jamal Hadi Salim | 9 | 0.04% | 2 | 1.02% |
| Baowen Zheng | 9 | 0.04% | 3 | 1.52% |
| Michal Kubeček | 8 | 0.04% | 1 | 0.51% |
| Thomas Graf | 6 | 0.03% | 1 | 0.51% |
| Oz Shlomo | 5 | 0.02% | 2 | 1.02% |
| Toke Höiland-Jörgensen | 5 | 0.02% | 1 | 0.51% |
| Michal Koutný | 5 | 0.02% | 1 | 0.51% |
| Pedro Tammela | 4 | 0.02% | 1 | 0.51% |
| Zhengchao Shao | 4 | 0.02% | 1 | 0.51% |
| Linus Torvalds (pre-git) | 3 | 0.01% | 1 | 0.51% |
| Maksym Glubokiy | 3 | 0.01% | 1 | 0.51% |
| Dan Carpenter | 2 | 0.01% | 1 | 0.51% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.51% |
| Matthew Wilcox | 2 | 0.01% | 2 | 1.02% |
| David S. Miller | 1 | 0.00% | 1 | 0.51% |
| Pankaj Bharadiya | 1 | 0.00% | 1 | 0.51% |
| Taichi Nishimura | 1 | 0.00% | 1 | 0.51% |
| Total | 20437 | 197 |
// 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/bitfield.h> #include <linux/if_ether.h> #include <linux/in6.h> #include <linux/ip.h> #include <linux/mpls.h> #include <linux/ppp_defs.h> #include <net/sch_generic.h> #include <net/pkt_cls.h> #include <net/pkt_sched.h> #include <net/ip.h> #include <net/flow_dissector.h> #include <net/geneve.h> #include <net/vxlan.h> #include <net/erspan.h> #include <net/gtp.h> #include <net/tc_wrapper.h> #include <net/dst.h> #include <net/dst_metadata.h> #include <uapi/linux/netfilter/nf_conntrack_common.h> #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) struct fl_flow_key { struct flow_dissector_key_meta meta; 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_range tp_range; struct flow_dissector_key_ct ct; struct flow_dissector_key_hash hash; struct flow_dissector_key_num_of_vlans num_of_vlans; struct flow_dissector_key_pppoe pppoe; struct flow_dissector_key_l2tpv3 l2tpv3; struct flow_dissector_key_ipsec ipsec; struct flow_dissector_key_cfm cfm; } __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; u8 needs_tc_skb_ext:1; 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) { u16 min_mask, max_mask, min_val, max_val; min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); min_val = ntohs(filter->key.tp_range.tp_min.dst); max_val = ntohs(filter->key.tp_range.tp_max.dst); if (min_mask && max_mask) { if (ntohs(key->tp_range.tp.dst) < min_val || ntohs(key->tp_range.tp.dst) > max_val) return false; /* skb does not have min and max values */ mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; mkey->tp_range.tp_max.dst = filter->mkey.tp_range.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) { u16 min_mask, max_mask, min_val, max_val; min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); min_val = ntohs(filter->key.tp_range.tp_min.src); max_val = ntohs(filter->key.tp_range.tp_max.src); if (min_mask && max_mask) { if (ntohs(key->tp_range.tp.src) < min_val || ntohs(key->tp_range.tp.src) > max_val) return false; /* skb does not have min and max values */ mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; mkey->tp_range.tp_max.src = filter->mkey.tp_range.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 noinline_for_stack struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) { struct fl_flow_key mkey; fl_set_masked_key(&mkey, key, mask); if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) return fl_lookup_range(mask, &mkey, key); return __fl_lookup(mask, &mkey); } static u16 fl_ct_info_to_flower_map[] = { [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_RELATED, [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | TCA_FLOWER_KEY_CT_FLAGS_REPLY, [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_RELATED | TCA_FLOWER_KEY_CT_FLAGS_REPLY, [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_NEW, }; TC_INDIRECT_SCOPE 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); bool post_ct = tc_skb_cb(skb)->post_ct; u16 zone = tc_skb_cb(skb)->zone; struct fl_flow_key skb_key; struct fl_flow_mask *mask; struct cls_fl_filter *f; list_for_each_entry_rcu(mask, &head->masks, list) { flow_dissector_init_keys(&skb_key.control, &skb_key.basic); fl_clear_masked_range(&skb_key, mask); skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); /* 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, false); skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, fl_ct_info_to_flower_map, ARRAY_SIZE(fl_ct_info_to_flower_map), post_ct, zone); skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); skb_flow_dissect(skb, &mask->dissector, &skb_key, FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); f = fl_mask_lookup(mask, &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) { if (f->needs_tc_skb_ext) tc_skb_ext_tc_disable(); 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 tcf_block *block = tp->chain->block; struct flow_cls_offload cls_flower = {}; tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); cls_flower.command = FLOW_CLS_DESTROY; cls_flower.cookie = (unsigned long) f; tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, &f->flags, &f->in_hw_count, rtnl_held); } static int fl_hw_replace_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool rtnl_held, struct netlink_ext_ack *extack) { struct tcf_block *block = tp->chain->block; struct flow_cls_offload cls_flower = {}; bool skip_sw = tc_skip_sw(f->flags); int err = 0; cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); if (!cls_flower.rule) return -ENOMEM; tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); cls_flower.command = FLOW_CLS_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_offload_action(&cls_flower.rule->action, &f->exts, cls_flower.common.extack); if (err) { kfree(cls_flower.rule); return skip_sw ? err : 0; } err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw, &f->flags, &f->in_hw_count, rtnl_held); tc_cleanup_offload_action(&cls_flower.rule->action); kfree(cls_flower.rule); if (err) { fl_hw_destroy_filter(tp, f, rtnl_held, NULL); return err; } if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) return -EINVAL; return 0; } static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, bool rtnl_held) { struct tcf_block *block = tp->chain->block; struct flow_cls_offload cls_flower = {}; tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); cls_flower.command = FLOW_CLS_STATS; cls_flower.cookie = (unsigned long) f; cls_flower.classid = f->res.classid; tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, rtnl_held); tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); } 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 tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle) { struct cls_fl_head *head = rcu_dereference_bh(tp->root); struct cls_fl_filter *f; f = idr_find(&head->handle_idr, handle); return f ? &f->exts : NULL; } 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] = { .strict_start_type = TCA_FLOWER_L2_MISS }, [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_MPLS_OPTS] = { .type = NLA_NESTED }, [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 }, [TCA_FLOWER_KEY_CT_STATE] = NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), [TCA_FLOWER_KEY_CT_STATE_MASK] = NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, .len = 128 / BITS_PER_BYTE }, [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, .len = 128 / BITS_PER_BYTE }, [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_SPI] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_SPI_MASK] = { .type = NLA_U32 }, [TCA_FLOWER_L2_MISS] = NLA_POLICY_MAX(NLA_U8, 1), [TCA_FLOWER_KEY_CFM] = { .type = NLA_NESTED }, }; static const struct nla_policy enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .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 const struct nla_policy vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, }; static const struct nla_policy erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, }; static const struct nla_policy gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, }; static const struct nla_policy mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, }; static const struct nla_policy cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX + 1] = { [TCA_FLOWER_KEY_CFM_MD_LEVEL] = NLA_POLICY_MAX(NLA_U8, FLOW_DIS_CFM_MDL_MAX), [TCA_FLOWER_KEY_CFM_OPCODE] = { .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; nla_memcpy(val, tb[val_type], len); if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) memset(mask, 0xff, len); else nla_memcpy(mask, tb[mask_type], len); } static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask, struct netlink_ext_ack *extack) { if (key->basic.ip_proto != IPPROTO_ESP && key->basic.ip_proto != IPPROTO_AH) { NL_SET_ERR_MSG(extack, "Protocol must be either ESP or AH"); return -EINVAL; } fl_set_key_val(tb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, sizeof(key->ipsec.spi)); return 0; } static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask, struct netlink_ext_ack *extack) { fl_set_key_val(tb, &key->tp_range.tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); fl_set_key_val(tb, &key->tp_range.tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); fl_set_key_val(tb, &key->tp_range.tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); fl_set_key_val(tb, &key->tp_range.tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { NL_SET_ERR_MSG(extack, "Both min and max destination ports must be specified"); return -EINVAL; } if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { NL_SET_ERR_MSG(extack, "Both min and max source ports must be specified"); return -EINVAL; } if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && ntohs(key->tp_range.tp_max.dst) <= ntohs(key->tp_range.tp_min.dst)) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_PORT_DST_MIN], "Invalid destination port range (min must be strictly smaller than max)"); return -EINVAL; } if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && ntohs(key->tp_range.tp_max.src) <= ntohs(key->tp_range.tp_min.src)) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_PORT_SRC_MIN], "Invalid source port range (min must be strictly smaller than max)"); return -EINVAL; } return 0; } static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, struct flow_dissector_key_mpls *key_val, struct flow_dissector_key_mpls *key_mask, struct netlink_ext_ack *extack) { struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; struct flow_dissector_mpls_lse *lse_mask; struct flow_dissector_mpls_lse *lse_val; u8 lse_index; u8 depth; int err; err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, mpls_stack_entry_policy, extack); if (err < 0) return err; if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); return -EINVAL; } depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); /* LSE depth starts at 1, for consistency with terminology used by * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. */ if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], "Invalid MPLS depth"); return -EINVAL; } lse_index = depth - 1; dissector_set_mpls_lse(key_val, lse_index); dissector_set_mpls_lse(key_mask, lse_index); lse_val = &key_val->ls[lse_index]; lse_mask = &key_mask->ls[lse_index]; if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); lse_mask->mpls_ttl = MPLS_TTL_MASK; } if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); if (bos & ~MPLS_BOS_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], "Bottom Of Stack (BOS) must be 0 or 1"); return -EINVAL; } lse_val->mpls_bos = bos; lse_mask->mpls_bos = MPLS_BOS_MASK; } if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); if (tc & ~MPLS_TC_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], "Traffic Class (TC) must be between 0 and 7"); return -EINVAL; } lse_val->mpls_tc = tc; lse_mask->mpls_tc = MPLS_TC_MASK; } if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); if (label & ~MPLS_LABEL_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], "Label must be between 0 and 1048575"); return -EINVAL; } lse_val->mpls_label = label; lse_mask->mpls_label = MPLS_LABEL_MASK; } return 0; } static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, struct flow_dissector_key_mpls *key_val, struct flow_dissector_key_mpls *key_mask, struct netlink_ext_ack *extack) { struct nlattr *nla_lse; int rem; int err; if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, "NLA_F_NESTED is missing"); return -EINVAL; } nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { NL_SET_ERR_MSG_ATTR(extack, nla_lse, "Invalid MPLS option type"); return -EINVAL; } err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); if (err < 0) return err; } if (rem) { NL_SET_ERR_MSG(extack, "Bytes leftover after parsing MPLS options"); 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, struct netlink_ext_ack *extack) { struct flow_dissector_mpls_lse *lse_mask; struct flow_dissector_mpls_lse *lse_val; if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { if (tb[TCA_FLOWER_KEY_MPLS_TTL] || tb[TCA_FLOWER_KEY_MPLS_BOS] || tb[TCA_FLOWER_KEY_MPLS_TC] || tb[TCA_FLOWER_KEY_MPLS_LABEL]) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_OPTS], "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); return -EBADMSG; } return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], key_val, key_mask, extack); } lse_val = &key_val->ls[0]; lse_mask = &key_mask->ls[0]; if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); lse_mask->mpls_ttl = MPLS_TTL_MASK; dissector_set_mpls_lse(key_val, 0); dissector_set_mpls_lse(key_mask, 0); } if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); if (bos & ~MPLS_BOS_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_BOS], "Bottom Of Stack (BOS) must be 0 or 1"); return -EINVAL; } lse_val->mpls_bos = bos; lse_mask->mpls_bos = MPLS_BOS_MASK; dissector_set_mpls_lse(key_val, 0); dissector_set_mpls_lse(key_mask, 0); } if (tb[TCA_FLOWER_KEY_MPLS_TC]) { u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); if (tc & ~MPLS_TC_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_TC], "Traffic Class (TC) must be between 0 and 7"); return -EINVAL; } lse_val->mpls_tc = tc; lse_mask->mpls_tc = MPLS_TC_MASK; dissector_set_mpls_lse(key_val, 0); dissector_set_mpls_lse(key_mask, 0); } if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); if (label & ~MPLS_LABEL_MASK) { NL_SET_ERR_MSG_ATTR(extack, tb[TCA_FLOWER_KEY_MPLS_LABEL], "Label must be between 0 and 1048575"); return -EINVAL; } lse_val->mpls_label = label; lse_mask->mpls_label = MPLS_LABEL_MASK; dissector_set_mpls_lse(key_val, 0); dissector_set_mpls_lse(key_mask, 0); } return 0; } static void fl_set_key_vlan(struct nlattr **tb, __be16 ethertype, int vlan_id_key, int vlan_prio_key, int vlan_next_eth_type_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; } if (ethertype) { key_val->vlan_tpid = ethertype; key_mask->vlan_tpid = cpu_to_be16(~0); } if (tb[vlan_next_eth_type_key]) { key_val->vlan_eth_type = nla_get_be16(tb[vlan_next_eth_type_key]); key_mask->vlan_eth_type = cpu_to_be16(~0); } } static void fl_set_key_pppoe(struct nlattr **tb, struct flow_dissector_key_pppoe *key_val, struct flow_dissector_key_pppoe *key_mask, struct fl_flow_key *key, struct fl_flow_key *mask) { /* key_val::type must be set to ETH_P_PPP_SES * because ETH_P_PPP_SES was stored in basic.n_proto * which might get overwritten by ppp_proto * or might be set to 0, the role of key_val::type * is similar to vlan_key::tpid */ key_val->type = htons(ETH_P_PPP_SES); key_mask->type = cpu_to_be16(~0); if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { key_val->session_id = nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); key_mask->session_id = cpu_to_be16(~0); } if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { key_val->ppp_proto = nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); key_mask->ppp_proto = cpu_to_be16(~0); if (key_val->ppp_proto == htons(PPP_IP)) { key->basic.n_proto = htons(ETH_P_IP); mask->basic.n_proto = cpu_to_be16(~0); } else if (key_val->ppp_proto == htons(PPP_IPV6)) { key->basic.n_proto = htons(ETH_P_IPV6); mask->basic.n_proto = cpu_to_be16(~0); } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { key->basic.n_proto = htons(ETH_P_MPLS_UC); mask->basic.n_proto = cpu_to_be16(~0); } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { key->basic.n_proto = htons(ETH_P_MPLS_MC); mask->basic.n_proto = cpu_to_be16(~0); } } else { key->basic.n_proto = 0; mask->basic.n_proto = 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, struct netlink_ext_ack *extack) { u32 key, mask; /* mask is mandatory for flags */ if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { NL_SET_ERR_MSG(extack, "Missing flags mask"); return -EINVAL; } key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); mask = be32_to_cpu(nla_get_be32(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); if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) return -ERANGE; 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_vxlan_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_VXLAN_MAX + 1]; struct vxlan_metadata *md; int err; md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; memset(md, 0xff, sizeof(*md)); if (!depth) return sizeof(*md); if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); return -EINVAL; } err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, vxlan_opt_policy, extack); if (err < 0) return err; if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); return -EINVAL; } if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); md->gbp &= VXLAN_GBP_MASK; } return sizeof(*md); } static int fl_set_erspan_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_ERSPAN_MAX + 1]; struct erspan_metadata *md; int err; md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; memset(md, 0xff, sizeof(*md)); md->version = 1; if (!depth) return sizeof(*md); if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); return -EINVAL; } err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, erspan_opt_policy, extack); if (err < 0) return err; if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); return -EINVAL; } if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); if (md->version == 1) { if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); return -EINVAL; } if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; memset(&md->u, 0x00, sizeof(md->u)); md->u.index = nla_get_be32(nla); } } else if (md->version == 2) { if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); return -EINVAL; } if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; md->u.md2.dir = nla_get_u8(nla); } if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; set_hwid(&md->u.md2, nla_get_u8(nla)); } } else { NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); return -EINVAL; } return sizeof(*md); } static int fl_set_gtp_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_GTP_MAX + 1]; struct gtp_pdu_session_info *sinfo; u8 len = key->enc_opts.len; int err; sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; memset(sinfo, 0xff, option_len); if (!depth) return sizeof(*sinfo); if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); return -EINVAL; } err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, gtp_opt_policy, extack); if (err < 0) return err; if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { NL_SET_ERR_MSG_MOD(extack, "Missing tunnel key gtp option pdu type or qfi"); return -EINVAL; } if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) sinfo->pdu_type = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); return sizeof(*sinfo); } 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]); if (!nla_ok(nla_opt_msk, msk_depth)) { NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); return -EINVAL; } } 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: if (key->enc_opts.dst_opt_type && key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); return -EINVAL; } 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; } break; case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: if (key->enc_opts.dst_opt_type) { NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); return -EINVAL; } option_len = 0; key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; option_len = fl_set_vxlan_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_VXLAN_OPT; option_len = fl_set_vxlan_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; } break; case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: if (key->enc_opts.dst_opt_type) { NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); return -EINVAL; } option_len = 0; key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; option_len = fl_set_erspan_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_ERSPAN_OPT; option_len = fl_set_erspan_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; } break; case TCA_FLOWER_KEY_ENC_OPTS_GTP: if (key->enc_opts.dst_opt_type) { NL_SET_ERR_MSG_MOD(extack, "Duplicate type for gtp options"); return -EINVAL; } option_len = 0; key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; option_len = fl_set_gtp_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_GTP_OPT; option_len = fl_set_gtp_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_MOD(extack, "Key and mask miss aligned"); return -EINVAL; } break; default: NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); return -EINVAL; } if (!msk_depth) continue; if (!nla_ok(nla_opt_msk, msk_depth)) { NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); return -EINVAL; } nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); } return 0; } static int fl_validate_ct_state(u16 state, struct nlattr *tb, struct netlink_ext_ack *extack) { if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { NL_SET_ERR_MSG_ATTR(extack, tb, "no trk, so no other flag can be set"); return -EINVAL; } if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { NL_SET_ERR_MSG_ATTR(extack, tb, "new and est are mutually exclusive"); return -EINVAL; } if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { NL_SET_ERR_MSG_ATTR(extack, tb, "when inv is set, only trk may be set"); return -EINVAL; } if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { NL_SET_ERR_MSG_ATTR(extack, tb, "new and rpl are mutually exclusive"); return -EINVAL; } return 0; } static int fl_set_key_ct(struct nlattr **tb, struct flow_dissector_key_ct *key, struct flow_dissector_key_ct *mask, struct netlink_ext_ack *extack) { if (tb[TCA_FLOWER_KEY_CT_STATE]) { int err; if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); return -EOPNOTSUPP; } fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, sizeof(key->ct_state)); err = fl_validate_ct_state(key->ct_state & mask->ct_state, tb[TCA_FLOWER_KEY_CT_STATE_MASK], extack); if (err) return err; } if (tb[TCA_FLOWER_KEY_CT_ZONE]) { if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); return -EOPNOTSUPP; } fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, sizeof(key->ct_zone)); } if (tb[TCA_FLOWER_KEY_CT_MARK]) { if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); return -EOPNOTSUPP; } fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, sizeof(key->ct_mark)); } if (tb[TCA_FLOWER_KEY_CT_LABELS]) { if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); return -EOPNOTSUPP; } fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, sizeof(key->ct_labels)); } return 0; } static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, struct fl_flow_key *key, struct fl_flow_key *mask, int vthresh) { const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; if (!tb) { *ethertype = 0; return good_num_of_vlans; } *ethertype = nla_get_be16(tb); if (good_num_of_vlans || eth_type_vlan(*ethertype)) return true; key->basic.n_proto = *ethertype; mask->basic.n_proto = cpu_to_be16(~0); return false; } static void fl_set_key_cfm_md_level(struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask, struct netlink_ext_ack *extack) { u8 level; if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) return; level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; } static void fl_set_key_cfm_opcode(struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask, struct netlink_ext_ack *extack) { fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, &mask->cfm.opcode, TCA_FLOWER_UNSPEC, sizeof(key->cfm.opcode)); } static int fl_set_key_cfm(struct nlattr **tb, struct fl_flow_key *key, struct fl_flow_key *mask, struct netlink_ext_ack *extack) { struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; int err; if (!tb[TCA_FLOWER_KEY_CFM]) return 0; err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); if (err < 0) return err; fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 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; if (tb[TCA_FLOWER_INDEV]) { int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); if (err < 0) return err; key->meta.ingress_ifindex = err; mask->meta.ingress_ifindex = 0xffffffff; } fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss)); 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)); fl_set_key_val(tb, &key->num_of_vlans, TCA_FLOWER_KEY_NUM_OF_VLANS, &mask->num_of_vlans, TCA_FLOWER_UNSPEC, sizeof(key->num_of_vlans)); if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, TCA_FLOWER_KEY_VLAN_PRIO, TCA_FLOWER_KEY_VLAN_ETH_TYPE, &key->vlan, &mask->vlan); if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], ðertype, key, mask, 1)) { fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_CVLAN_ID, TCA_FLOWER_KEY_CVLAN_PRIO, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, &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)); } } if (key->basic.n_proto == htons(ETH_P_PPP_SES)) fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 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, extack); 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)); } else if (key->basic.ip_proto == IPPROTO_L2TP) { fl_set_key_val(tb, &key->l2tpv3.session_id, TCA_FLOWER_KEY_L2TPV3_SID, &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, sizeof(key->l2tpv3.session_id)); } else if (key->basic.n_proto == htons(ETH_P_CFM)) { ret = fl_set_key_cfm(tb, key, mask, extack); if (ret) return ret; } 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, extack); if (ret) return ret; } if (tb[TCA_FLOWER_KEY_SPI]) { ret = fl_set_key_spi(tb, key, mask, extack); 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); fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, sizeof(key->hash.hash)); if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { ret = fl_set_enc_opt(tb, key, mask, extack); if (ret) return ret; } ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); if (ret) return ret; if (tb[TCA_FLOWER_KEY_FLAGS]) ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags, extack); 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_field(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_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_META, meta); 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); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 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); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_CT, ct); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_HASH, hash); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_PPPOE, pppoe); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_IPSEC, ipsec); FL_KEY_SET_IF_MASKED(mask, keys, cnt, FLOW_DISSECTOR_KEY_CFM, cfm); 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_range.tp_min.dst && newmask->key.tp_range.tp_max.dst) || (newmask->key.tp_range.tp_min.src && newmask->key.tp_range.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 bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) { return mask->meta.l2_miss; } 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, u32 flags, struct netlink_ext_ack *extack) { struct cls_fl_head *head = fl_head_dereference(tp); bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); struct cls_fl_filter *fold = *arg; bool bound_to_filter = false; 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); if (tb[TCA_FLOWER_FLAGS]) { fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); if (!tc_flags_valid(fnew->flags)) { kfree(fnew); err = -EINVAL; goto errout_tb; } } if (!fold) { spin_lock(&tp->lock); if (!handle) { handle = 1; err = idr_alloc_u32(&head->handle_idr, NULL, &handle, INT_MAX, GFP_ATOMIC); } else { err = idr_alloc_u32(&head->handle_idr, NULL, &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; } spin_unlock(&tp->lock); if (err) { kfree(fnew); goto errout_tb; } } fnew->handle = handle; err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, !tc_skip_hw(fnew->flags)); if (err < 0) goto errout_idr; err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], &fnew->exts, flags, fnew->flags, extack); if (err < 0) goto errout_idr; if (tb[TCA_FLOWER_CLASSID]) { fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); if (flags & TCA_ACT_FLAGS_NO_RTNL) rtnl_lock(); tcf_bind_filter(tp, &fnew->res, base); if (flags & TCA_ACT_FLAGS_NO_RTNL) rtnl_unlock(); bound_to_filter = true; } err = fl_set_key(net, tb, &fnew->key, &mask->key, extack); if (err) goto unbind_filter; fl_mask_update_range(mask); fl_set_masked_key(&fnew->mkey, &fnew->key, mask); if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); err = -EINVAL; goto unbind_filter; } /* Enable tc skb extension if filter matches on data extracted from * this extension. */ if (fl_needs_tc_skb_ext(&mask->key)) { fnew->needs_tc_skb_ext = 1; tc_skb_ext_tc_enable(); } err = fl_check_assign_mask(head, fnew, fold, mask); if (err) goto unbind_filter; 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 { idr_replace(&head->handle_idr, fnew, fnew->handle); refcount_inc(&fnew->refcnt); 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); unbind_filter: if (bound_to_filter) { if (flags & TCA_ACT_FLAGS_NO_RTNL) rtnl_lock(); tcf_unbind_filter(tp, &fnew->res); if (flags & TCA_ACT_FLAGS_NO_RTNL) rtnl_unlock(); } errout_idr: if (!fold) { spin_lock(&tp->lock); idr_remove(&head->handle_idr, fnew->handle); spin_unlock(&tp->lock); } __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_head *head = fl_head_dereference(tp); unsigned long id = arg->cookie, tmp; struct cls_fl_filter *f; arg->count = arg->skip; rcu_read_lock(); idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { /* don't return filters that are being deleted */ if (!f || !refcount_inc_not_zero(&f->refcnt)) continue; rcu_read_unlock(); if (arg->fn(tp, f, arg) < 0) { __fl_put(f); arg->stop = 1; rcu_read_lock(); break; } __fl_put(f); arg->count++; rcu_read_lock(); } rcu_read_unlock(); arg->cookie = id; } 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, flow_setup_cb_t *cb, void *cb_priv, struct netlink_ext_ack *extack) { struct tcf_block *block = tp->chain->block; struct flow_cls_offload cls_flower = {}; 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 ? FLOW_CLS_REPLACE : FLOW_CLS_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_offload_action(&cls_flower.rule->action, &f->exts, cls_flower.common.extack); if (err) { kfree(cls_flower.rule); if (tc_skip_sw(f->flags)) { __fl_put(f); return err; } goto next_flow; } cls_flower.classid = f->res.classid; err = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSFLOWER, &cls_flower, cb_priv, &f->flags, &f->in_hw_count); tc_cleanup_offload_action(&cls_flower.rule->action); kfree(cls_flower.rule); if (err) { __fl_put(f); return err; } next_flow: __fl_put(f); } return 0; } static void fl_hw_add(struct tcf_proto *tp, void *type_data) { struct flow_cls_offload *cls_flower = type_data; struct cls_fl_filter *f = (struct cls_fl_filter *) cls_flower->cookie; struct cls_fl_head *head = fl_head_dereference(tp); spin_lock(&tp->lock); list_add(&f->hw_list, &head->hw_filters); spin_unlock(&tp->lock); } static void fl_hw_del(struct tcf_proto *tp, void *type_data) { struct flow_cls_offload *cls_flower = type_data; struct cls_fl_filter *f = (struct cls_fl_filter *) cls_flower->cookie; spin_lock(&tp->lock); if (!list_empty(&f->hw_list)) list_del_init(&f->hw_list); spin_unlock(&tp->lock); } static int fl_hw_create_tmplt(struct tcf_chain *chain, struct fl_flow_tmplt *tmplt) { struct flow_cls_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 = FLOW_CLS_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, true); kfree(cls_flower.rule); return 0; } static void fl_hw_destroy_tmplt(struct tcf_chain *chain, struct fl_flow_tmplt *tmplt) { struct flow_cls_offload cls_flower = {}; struct tcf_block *block = chain->block; cls_flower.common.chain_index = chain->index; cls_flower.command = FLOW_CLS_TMPLT_DESTROY; cls_flower.cookie = (unsigned long) tmplt; tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); } 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 void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, flow_setup_cb_t *cb, void *cb_priv) { struct fl_flow_tmplt *tmplt = chain->tmplt_priv; struct flow_cls_offload cls_flower = {}; cls_flower.rule = flow_rule_alloc(0); if (!cls_flower.rule) return; cls_flower.common.chain_index = chain->index; cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : FLOW_CLS_TMPLT_DESTROY; 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; cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); kfree(cls_flower.rule); } 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_range.tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)) || fl_dump_key_val(skb, &key->tp_range.tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)) || fl_dump_key_val(skb, &key->tp_range.tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)) || fl_dump_key_val(skb, &key->tp_range.tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src))) return -1; return 0; } static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, struct flow_dissector_key_mpls *mpls_key, struct flow_dissector_key_mpls *mpls_mask, u8 lse_index) { struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; int err; err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, lse_index + 1); if (err) return err; if (lse_mask->mpls_ttl) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, lse_key->mpls_ttl); if (err) return err; } if (lse_mask->mpls_bos) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, lse_key->mpls_bos); if (err) return err; } if (lse_mask->mpls_tc) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, lse_key->mpls_tc); if (err) return err; } if (lse_mask->mpls_label) { err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, lse_key->mpls_label); if (err) return err; } return 0; } static int fl_dump_key_mpls_opts(struct sk_buff *skb, struct flow_dissector_key_mpls *mpls_key, struct flow_dissector_key_mpls *mpls_mask) { struct nlattr *opts; struct nlattr *lse; u8 lse_index; int err; opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); if (!opts) return -EMSGSIZE; for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { if (!(mpls_mask->used_lses & 1 << lse_index)) continue; lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); if (!lse) { err = -EMSGSIZE; goto err_opts; } err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, lse_index); if (err) goto err_opts_lse; nla_nest_end(skb, lse); } nla_nest_end(skb, opts); return 0; err_opts_lse: nla_nest_cancel(skb, lse); err_opts: nla_nest_cancel(skb, opts); return err; } static int fl_dump_key_mpls(struct sk_buff *skb, struct flow_dissector_key_mpls *mpls_key, struct flow_dissector_key_mpls *mpls_mask) { struct flow_dissector_mpls_lse *lse_mask; struct flow_dissector_mpls_lse *lse_key; int err; if (!mpls_mask->used_lses) return 0; lse_mask = &mpls_mask->ls[0]; lse_key = &mpls_key->ls[0]; /* For backward compatibility, don't use the MPLS nested attributes if * the rule can be expressed using the old attributes. */ if (mpls_mask->used_lses & ~1 || (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && !lse_mask->mpls_tc && !lse_mask->mpls_label)) return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); if (lse_mask->mpls_ttl) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, lse_key->mpls_ttl); if (err) return err; } if (lse_mask->mpls_tc) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, lse_key->mpls_tc); if (err) return err; } if (lse_mask->mpls_label) { err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, lse_key->mpls_label); if (err) return err; } if (lse_mask->mpls_bos) { err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, lse_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_vxlan_opt(struct sk_buff *skb, struct flow_dissector_key_enc_opts *enc_opts) { struct vxlan_metadata *md; struct nlattr *nest; nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); if (!nest) goto nla_put_failure; md = (struct vxlan_metadata *)&enc_opts->data[0]; if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 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_erspan_opt(struct sk_buff *skb, struct flow_dissector_key_enc_opts *enc_opts) { struct erspan_metadata *md; struct nlattr *nest; nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); if (!nest) goto nla_put_failure; md = (struct erspan_metadata *)&enc_opts->data[0]; if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) goto nla_put_failure; if (md->version == 1 && nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) goto nla_put_failure; if (md->version == 2 && (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, md->u.md2.dir) || nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, get_hwid(&md->u.md2)))) 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_gtp_opt(struct sk_buff *skb, struct flow_dissector_key_enc_opts *enc_opts) { struct gtp_pdu_session_info *session_info; struct nlattr *nest; nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); if (!nest) goto nla_put_failure; session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, session_info->pdu_type)) goto nla_put_failure; if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 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_ct(struct sk_buff *skb, struct flow_dissector_key_ct *key, struct flow_dissector_key_ct *mask) { if (IS_ENABLED(CONFIG_NF_CONNTRACK) && fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, sizeof(key->ct_state))) goto nla_put_failure; if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, sizeof(key->ct_zone))) goto nla_put_failure; if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, sizeof(key->ct_mark))) goto nla_put_failure; if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, sizeof(key->ct_labels))) goto nla_put_failure; return 0; nla_put_failure: return -EMSGSIZE; } static int fl_dump_key_cfm(struct sk_buff *skb, struct flow_dissector_key_cfm *key, struct flow_dissector_key_cfm *mask) { struct nlattr *opts; int err; u8 mdl; if (!memchr_inv(mask, 0, sizeof(*mask))) return 0; opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); if (!opts) return -EMSGSIZE; if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); if (err) goto err_cfm_opts; } if (mask->opcode) { err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); if (err) goto err_cfm_opts; } nla_nest_end(skb, opts); return 0; err_cfm_opts: nla_nest_cancel(skb, opts); return err; } 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; case TUNNEL_VXLAN_OPT: err = fl_dump_key_vxlan_opt(skb, enc_opts); if (err) goto nla_put_failure; break; case TUNNEL_ERSPAN_OPT: err = fl_dump_key_erspan_opt(skb, enc_opts); if (err) goto nla_put_failure; break; case TUNNEL_GTP_OPT: err = fl_dump_key_gtp_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->meta.ingress_ifindex) { struct net_device *dev; dev = __dev_get_by_index(net, key->meta.ingress_ifindex); if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) goto nla_put_failure; } if (fl_dump_key_val(skb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 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 (mask->num_of_vlans.num_of_vlans) { if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 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_eth_type) { if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, key->basic.n_proto)) goto nla_put_failure; } else if (mask->vlan.vlan_eth_type) { if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, key->vlan.vlan_eth_type)) 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 (mask->pppoe.session_id) { if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, key->pppoe.session_id)) goto nla_put_failure; } if (mask->basic.n_proto && mask->pppoe.ppp_proto) { if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, key->pppoe.ppp_proto)) 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; else if (key->basic.ip_proto == IPPROTO_L2TP && fl_dump_key_val(skb, &key->l2tpv3.session_id, TCA_FLOWER_KEY_L2TPV3_SID, &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, sizeof(key->l2tpv3.session_id))) goto nla_put_failure; if (key->ipsec.spi && fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, sizeof(key->ipsec.spi))) 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_ct(skb, &key->ct, &mask->ct)) goto nla_put_failure; if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) goto nla_put_failure; if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, sizeof(key->hash.hash))) goto nla_put_failure; if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 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_terse_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; 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); skip_hw = tc_skip_hw(f->flags); 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 (tcf_exts_terse_dump(skb, &f->exts)) goto nla_put_failure; nla_nest_end(skb, nest); 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, void *q, unsigned long base) { struct cls_fl_filter *f = fh; tc_cls_bind_class(classid, cl, q, &f->res, base); } static bool fl_delete_empty(struct tcf_proto *tp) { struct cls_fl_head *head = fl_head_dereference(tp); spin_lock(&tp->lock); tp->deleting = idr_is_empty(&head->handle_idr); spin_unlock(&tp->lock); return tp->deleting; } 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, .delete_empty = fl_delete_empty, .walk = fl_walk, .reoffload = fl_reoffload, .hw_add = fl_hw_add, .hw_del = fl_hw_del, .dump = fl_dump, .terse_dump = fl_terse_dump, .bind_class = fl_bind_class, .tmplt_create = fl_tmplt_create, .tmplt_destroy = fl_tmplt_destroy, .tmplt_reoffload = fl_tmplt_reoffload, .tmplt_dump = fl_tmplt_dump, .get_exts = fl_get_exts, .owner = THIS_MODULE, .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, }; MODULE_ALIAS_NET_CLS("flower"); 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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