diff options
Diffstat (limited to 'net/sched/cls_flower.c')
| -rw-r--r-- | net/sched/cls_flower.c | 3474 |
1 files changed, 3474 insertions, 0 deletions
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c new file mode 100644 index 000000000..10e6ec0f9 --- /dev/null +++ b/net/sched/cls_flower.c @@ -0,0 +1,3474 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * net/sched/cls_flower.c Flower classifier + * + * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/rhashtable.h> +#include <linux/workqueue.h> +#include <linux/refcount.h> + +#include <linux/if_ether.h> +#include <linux/in6.h> +#include <linux/ip.h> +#include <linux/mpls.h> +#include <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/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; +} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ + +struct fl_flow_mask_range { + unsigned short int start; + unsigned short int end; +}; + +struct fl_flow_mask { + struct fl_flow_key key; + struct fl_flow_mask_range range; + u32 flags; + struct rhash_head ht_node; + struct rhashtable ht; + struct rhashtable_params filter_ht_params; + struct flow_dissector dissector; + struct list_head filters; + struct rcu_work rwork; + struct list_head list; + refcount_t refcnt; +}; + +struct fl_flow_tmplt { + struct fl_flow_key dummy_key; + struct fl_flow_key mask; + struct flow_dissector dissector; + struct tcf_chain *chain; +}; + +struct cls_fl_head { + struct rhashtable ht; + spinlock_t masks_lock; /* Protect masks list */ + struct list_head masks; + struct list_head hw_filters; + struct rcu_work rwork; + struct idr handle_idr; +}; + +struct cls_fl_filter { + struct fl_flow_mask *mask; + struct rhash_head ht_node; + struct fl_flow_key mkey; + struct tcf_exts exts; + struct tcf_result res; + struct fl_flow_key key; + struct list_head list; + struct list_head hw_list; + u32 handle; + u32 flags; + u32 in_hw_count; + struct rcu_work rwork; + struct net_device *hw_dev; + /* Flower classifier is unlocked, which means that its reference counter + * can be changed concurrently without any kind of external + * synchronization. Use atomic reference counter to be concurrency-safe. + */ + refcount_t refcnt; + bool deleted; +}; + +static const struct rhashtable_params mask_ht_params = { + .key_offset = offsetof(struct fl_flow_mask, key), + .key_len = sizeof(struct fl_flow_key), + .head_offset = offsetof(struct fl_flow_mask, ht_node), + .automatic_shrinking = true, +}; + +static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) +{ + return mask->range.end - mask->range.start; +} + +static void fl_mask_update_range(struct fl_flow_mask *mask) +{ + const u8 *bytes = (const u8 *) &mask->key; + size_t size = sizeof(mask->key); + size_t i, first = 0, last; + + for (i = 0; i < size; i++) { + if (bytes[i]) { + first = i; + break; + } + } + last = first; + for (i = size - 1; i != first; i--) { + if (bytes[i]) { + last = i; + break; + } + } + mask->range.start = rounddown(first, sizeof(long)); + mask->range.end = roundup(last + 1, sizeof(long)); +} + +static void *fl_key_get_start(struct fl_flow_key *key, + const struct fl_flow_mask *mask) +{ + return (u8 *) key + mask->range.start; +} + +static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, + struct fl_flow_mask *mask) +{ + const long *lkey = fl_key_get_start(key, mask); + const long *lmask = fl_key_get_start(&mask->key, mask); + long *lmkey = fl_key_get_start(mkey, mask); + int i; + + for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) + *lmkey++ = *lkey++ & *lmask++; +} + +static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, + struct fl_flow_mask *mask) +{ + const long *lmask = fl_key_get_start(&mask->key, mask); + const long *ltmplt; + int i; + + if (!tmplt) + return true; + ltmplt = fl_key_get_start(&tmplt->mask, mask); + for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { + if (~*ltmplt++ & *lmask++) + return false; + } + return true; +} + +static void fl_clear_masked_range(struct fl_flow_key *key, + struct fl_flow_mask *mask) +{ + memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); +} + +static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, + struct fl_flow_key *key, + struct fl_flow_key *mkey) +{ + 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, +}; + +static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, + struct tcf_result *res) +{ + struct cls_fl_head *head = rcu_dereference_bh(tp->root); + 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) +{ + 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.bytes, + cls_flower.stats.pkts, + cls_flower.stats.drops, + cls_flower.stats.lastused, + cls_flower.stats.used_hw_stats, + cls_flower.stats.used_hw_stats_valid); +} + +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 int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, + bool *last, bool rtnl_held, + struct netlink_ext_ack *extack) +{ + struct cls_fl_head *head = fl_head_dereference(tp); + + *last = false; + + spin_lock(&tp->lock); + if (f->deleted) { + spin_unlock(&tp->lock); + return -ENOENT; + } + + f->deleted = true; + rhashtable_remove_fast(&f->mask->ht, &f->ht_node, + f->mask->filter_ht_params); + idr_remove(&head->handle_idr, f->handle); + list_del_rcu(&f->list); + spin_unlock(&tp->lock); + + *last = fl_mask_put(head, f->mask); + if (!tc_skip_hw(f->flags)) + fl_hw_destroy_filter(tp, f, rtnl_held, extack); + tcf_unbind_filter(tp, &f->res); + __fl_put(f); + + return 0; +} + +static void fl_destroy_sleepable(struct work_struct *work) +{ + struct cls_fl_head *head = container_of(to_rcu_work(work), + struct cls_fl_head, + rwork); + + rhashtable_destroy(&head->ht); + kfree(head); + module_put(THIS_MODULE); +} + +static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, + struct netlink_ext_ack *extack) +{ + struct cls_fl_head *head = fl_head_dereference(tp); + struct fl_flow_mask *mask, *next_mask; + struct cls_fl_filter *f, *next; + bool last; + + list_for_each_entry_safe(mask, next_mask, &head->masks, list) { + list_for_each_entry_safe(f, next, &mask->filters, list) { + __fl_delete(tp, f, &last, rtnl_held, extack); + if (last) + break; + } + } + idr_destroy(&head->handle_idr); + + __module_get(THIS_MODULE); + tcf_queue_work(&head->rwork, fl_destroy_sleepable); +} + +static void fl_put(struct tcf_proto *tp, void *arg) +{ + struct cls_fl_filter *f = arg; + + __fl_put(f); +} + +static void *fl_get(struct tcf_proto *tp, u32 handle) +{ + struct cls_fl_head *head = fl_head_dereference(tp); + + return __fl_get(head, handle); +} + +static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { + [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, + [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, + [TCA_FLOWER_INDEV] = { .type = NLA_STRING, + .len = IFNAMSIZ }, + [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, + [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, + [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, + [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, + [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, + [TCA_FLOWER_KEY_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 }, + +}; + +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 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_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 simmilar 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 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->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)); + } + + 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_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); + + 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 int fl_set_parms(struct net *net, struct tcf_proto *tp, + struct cls_fl_filter *f, struct fl_flow_mask *mask, + unsigned long base, struct nlattr **tb, + struct nlattr *est, + struct fl_flow_tmplt *tmplt, + u32 flags, u32 fl_flags, + struct netlink_ext_ack *extack) +{ + int err; + + err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, + fl_flags, extack); + if (err < 0) + return err; + + if (tb[TCA_FLOWER_CLASSID]) { + f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_lock(); + tcf_bind_filter(tp, &f->res, base); + if (flags & TCA_ACT_FLAGS_NO_RTNL) + rtnl_unlock(); + } + + err = fl_set_key(net, tb, &f->key, &mask->key, extack); + if (err) + return err; + + fl_mask_update_range(mask); + fl_set_masked_key(&f->mkey, &f->key, mask); + + if (!fl_mask_fits_tmplt(tmplt, mask)) { + NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); + return -EINVAL; + } + + return 0; +} + +static int fl_ht_insert_unique(struct cls_fl_filter *fnew, + struct cls_fl_filter *fold, + bool *in_ht) +{ + struct fl_flow_mask *mask = fnew->mask; + int err; + + err = rhashtable_lookup_insert_fast(&mask->ht, + &fnew->ht_node, + mask->filter_ht_params); + if (err) { + *in_ht = false; + /* It is okay if filter with same key exists when + * overwriting. + */ + return fold && err == -EEXIST ? 0 : err; + } + + *in_ht = true; + return 0; +} + +static int fl_change(struct net *net, struct sk_buff *in_skb, + struct tcf_proto *tp, unsigned long base, + u32 handle, struct nlattr **tca, + void **arg, 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; + struct cls_fl_filter *fnew; + struct fl_flow_mask *mask; + struct nlattr **tb; + bool in_ht; + int err; + + if (!tca[TCA_OPTIONS]) { + err = -EINVAL; + goto errout_fold; + } + + mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); + if (!mask) { + err = -ENOBUFS; + goto errout_fold; + } + + tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); + if (!tb) { + err = -ENOBUFS; + goto errout_mask_alloc; + } + + err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, + tca[TCA_OPTIONS], fl_policy, NULL); + if (err < 0) + goto errout_tb; + + if (fold && handle && fold->handle != handle) { + err = -EINVAL; + goto errout_tb; + } + + fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); + if (!fnew) { + err = -ENOBUFS; + goto errout_tb; + } + INIT_LIST_HEAD(&fnew->hw_list); + refcount_set(&fnew->refcnt, 1); + + err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); + if (err < 0) + goto errout; + + if (tb[TCA_FLOWER_FLAGS]) { + fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); + + if (!tc_flags_valid(fnew->flags)) { + err = -EINVAL; + goto errout; + } + } + + err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], + tp->chain->tmplt_priv, flags, fnew->flags, + extack); + if (err) + goto errout; + + err = fl_check_assign_mask(head, fnew, fold, mask); + if (err) + goto errout; + + err = fl_ht_insert_unique(fnew, fold, &in_ht); + if (err) + goto errout_mask; + + if (!tc_skip_hw(fnew->flags)) { + err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); + if (err) + goto errout_ht; + } + + if (!tc_in_hw(fnew->flags)) + fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; + + spin_lock(&tp->lock); + + /* tp was deleted concurrently. -EAGAIN will cause caller to lookup + * proto again or create new one, if necessary. + */ + if (tp->deleting) { + err = -EAGAIN; + goto errout_hw; + } + + if (fold) { + /* Fold filter was deleted concurrently. Retry lookup. */ + if (fold->deleted) { + err = -EAGAIN; + goto errout_hw; + } + + fnew->handle = handle; + + if (!in_ht) { + struct rhashtable_params params = + fnew->mask->filter_ht_params; + + err = rhashtable_insert_fast(&fnew->mask->ht, + &fnew->ht_node, + params); + if (err) + goto errout_hw; + in_ht = true; + } + + refcount_inc(&fnew->refcnt); + rhashtable_remove_fast(&fold->mask->ht, + &fold->ht_node, + fold->mask->filter_ht_params); + idr_replace(&head->handle_idr, fnew, fnew->handle); + list_replace_rcu(&fold->list, &fnew->list); + fold->deleted = true; + + spin_unlock(&tp->lock); + + fl_mask_put(head, fold->mask); + if (!tc_skip_hw(fold->flags)) + fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); + tcf_unbind_filter(tp, &fold->res); + /* Caller holds reference to fold, so refcnt is always > 0 + * after this. + */ + refcount_dec(&fold->refcnt); + __fl_put(fold); + } else { + if (handle) { + /* user specifies a handle and it doesn't exist */ + err = idr_alloc_u32(&head->handle_idr, fnew, &handle, + handle, GFP_ATOMIC); + + /* Filter with specified handle was concurrently + * inserted after initial check in cls_api. This is not + * necessarily an error if NLM_F_EXCL is not set in + * message flags. Returning EAGAIN will cause cls_api to + * try to update concurrently inserted rule. + */ + if (err == -ENOSPC) + err = -EAGAIN; + } else { + handle = 1; + err = idr_alloc_u32(&head->handle_idr, fnew, &handle, + INT_MAX, GFP_ATOMIC); + } + if (err) + goto errout_hw; + + refcount_inc(&fnew->refcnt); + fnew->handle = handle; + list_add_tail_rcu(&fnew->list, &fnew->mask->filters); + spin_unlock(&tp->lock); + } + + *arg = fnew; + + kfree(tb); + tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); + return 0; + +errout_ht: + spin_lock(&tp->lock); +errout_hw: + fnew->deleted = true; + spin_unlock(&tp->lock); + if (!tc_skip_hw(fnew->flags)) + fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); + if (in_ht) + rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, + fnew->mask->filter_ht_params); +errout_mask: + fl_mask_put(head, fnew->mask); +errout: + __fl_put(fnew); +errout_tb: + kfree(tb); +errout_mask_alloc: + tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); +errout_fold: + if (fold) + __fl_put(fold); + return err; +} + +static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, + bool rtnl_held, struct netlink_ext_ack *extack) +{ + struct cls_fl_head *head = fl_head_dereference(tp); + struct cls_fl_filter *f = arg; + bool last_on_mask; + int err = 0; + + err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); + *last = list_empty(&head->masks); + __fl_put(f); + + return err; +} + +static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, + bool rtnl_held) +{ + struct cls_fl_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 (!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 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_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->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->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; + + 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_dump = fl_tmplt_dump, + .owner = THIS_MODULE, + .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, +}; + +static int __init cls_fl_init(void) +{ + return register_tcf_proto_ops(&cls_fl_ops); +} + +static void __exit cls_fl_exit(void) +{ + unregister_tcf_proto_ops(&cls_fl_ops); +} + +module_init(cls_fl_init); +module_exit(cls_fl_exit); + +MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); +MODULE_DESCRIPTION("Flower classifier"); +MODULE_LICENSE("GPL v2"); |