| /* |
| * net/sched/cls_flower.c Flower classifier |
| * |
| * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/rhashtable.h> |
| #include <linux/workqueue.h> |
| |
| #include <linux/if_ether.h> |
| #include <linux/in6.h> |
| #include <linux/ip.h> |
| #include <linux/mpls.h> |
| |
| #include <net/sch_generic.h> |
| #include <net/pkt_cls.h> |
| #include <net/ip.h> |
| #include <net/flow_dissector.h> |
| #include <net/geneve.h> |
| |
| #include <net/dst.h> |
| #include <net/dst_metadata.h> |
| |
| struct fl_flow_key { |
| int indev_ifindex; |
| struct flow_dissector_key_control control; |
| struct flow_dissector_key_control enc_control; |
| struct flow_dissector_key_basic basic; |
| struct flow_dissector_key_eth_addrs eth; |
| struct flow_dissector_key_vlan vlan; |
| struct flow_dissector_key_vlan cvlan; |
| union { |
| struct flow_dissector_key_ipv4_addrs ipv4; |
| struct flow_dissector_key_ipv6_addrs ipv6; |
| }; |
| struct flow_dissector_key_ports tp; |
| struct flow_dissector_key_icmp icmp; |
| struct flow_dissector_key_arp arp; |
| struct flow_dissector_key_keyid enc_key_id; |
| union { |
| struct flow_dissector_key_ipv4_addrs enc_ipv4; |
| struct flow_dissector_key_ipv6_addrs enc_ipv6; |
| }; |
| struct flow_dissector_key_ports enc_tp; |
| struct flow_dissector_key_mpls mpls; |
| struct flow_dissector_key_tcp tcp; |
| struct flow_dissector_key_ip ip; |
| struct flow_dissector_key_ip enc_ip; |
| struct flow_dissector_key_enc_opts enc_opts; |
| } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ |
| |
| struct fl_flow_mask_range { |
| unsigned short int start; |
| unsigned short int end; |
| }; |
| |
| struct fl_flow_mask { |
| struct fl_flow_key key; |
| struct fl_flow_mask_range range; |
| struct 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; |
| }; |
| |
| 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; |
| struct list_head masks; |
| 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; |
| u32 handle; |
| u32 flags; |
| unsigned int in_hw_count; |
| struct rcu_work rwork; |
| struct net_device *hw_dev; |
| }; |
| |
| 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 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 int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
| struct tcf_result *res) |
| { |
| struct cls_fl_head *head = rcu_dereference_bh(tp->root); |
| struct cls_fl_filter *f; |
| struct fl_flow_mask *mask; |
| struct fl_flow_key skb_key; |
| struct fl_flow_key skb_mkey; |
| |
| list_for_each_entry_rcu(mask, &head->masks, list) { |
| fl_clear_masked_range(&skb_key, mask); |
| |
| skb_key.indev_ifindex = skb->skb_iif; |
| /* skb_flow_dissect() does not set n_proto in case an unknown |
| * protocol, so do it rather here. |
| */ |
| skb_key.basic.n_proto = skb->protocol; |
| skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); |
| skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); |
| |
| fl_set_masked_key(&skb_mkey, &skb_key, mask); |
| |
| f = fl_lookup(mask, &skb_mkey); |
| if (f && !tc_skip_sw(f->flags)) { |
| *res = f->res; |
| return tcf_exts_exec(skb, &f->exts, res); |
| } |
| } |
| return -1; |
| } |
| |
| static int fl_init(struct tcf_proto *tp) |
| { |
| struct cls_fl_head *head; |
| |
| head = kzalloc(sizeof(*head), GFP_KERNEL); |
| if (!head) |
| return -ENOBUFS; |
| |
| INIT_LIST_HEAD_RCU(&head->masks); |
| 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) |
| { |
| 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); |
| } |
| |
| static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask, |
| bool async) |
| { |
| if (!list_empty(&mask->filters)) |
| return false; |
| |
| rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); |
| list_del_rcu(&mask->list); |
| if (async) |
| tcf_queue_work(&mask->rwork, fl_mask_free_work); |
| else |
| fl_mask_free(mask); |
| |
| return true; |
| } |
| |
| 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); |
| |
| rtnl_lock(); |
| __fl_destroy_filter(f); |
| rtnl_unlock(); |
| } |
| |
| static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, |
| struct netlink_ext_ack *extack) |
| { |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = tp->chain->block; |
| |
| tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); |
| cls_flower.command = TC_CLSFLOWER_DESTROY; |
| cls_flower.cookie = (unsigned long) f; |
| |
| tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, |
| &cls_flower, false); |
| tcf_block_offload_dec(block, &f->flags); |
| } |
| |
| static int fl_hw_replace_filter(struct tcf_proto *tp, |
| struct cls_fl_filter *f, |
| struct netlink_ext_ack *extack) |
| { |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = tp->chain->block; |
| bool skip_sw = tc_skip_sw(f->flags); |
| int err; |
| |
| tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); |
| cls_flower.command = TC_CLSFLOWER_REPLACE; |
| cls_flower.cookie = (unsigned long) f; |
| cls_flower.dissector = &f->mask->dissector; |
| cls_flower.mask = &f->mask->key; |
| cls_flower.key = &f->mkey; |
| cls_flower.exts = &f->exts; |
| cls_flower.classid = f->res.classid; |
| |
| err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, |
| &cls_flower, skip_sw); |
| if (err < 0) { |
| fl_hw_destroy_filter(tp, f, NULL); |
| return err; |
| } else if (err > 0) { |
| f->in_hw_count = err; |
| tcf_block_offload_inc(block, &f->flags); |
| } |
| |
| 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) |
| { |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = tp->chain->block; |
| |
| tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); |
| cls_flower.command = TC_CLSFLOWER_STATS; |
| cls_flower.cookie = (unsigned long) f; |
| cls_flower.exts = &f->exts; |
| cls_flower.classid = f->res.classid; |
| |
| tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, |
| &cls_flower, false); |
| } |
| |
| static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, |
| struct netlink_ext_ack *extack) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| bool async = tcf_exts_get_net(&f->exts); |
| bool last; |
| |
| idr_remove(&head->handle_idr, f->handle); |
| list_del_rcu(&f->list); |
| last = fl_mask_put(head, f->mask, async); |
| if (!tc_skip_hw(f->flags)) |
| fl_hw_destroy_filter(tp, f, extack); |
| tcf_unbind_filter(tp, &f->res); |
| if (async) |
| tcf_queue_work(&f->rwork, fl_destroy_filter_work); |
| else |
| __fl_destroy_filter(f); |
| |
| return last; |
| } |
| |
| 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, struct netlink_ext_ack *extack) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| struct fl_flow_mask *mask, *next_mask; |
| struct cls_fl_filter *f, *next; |
| |
| list_for_each_entry_safe(mask, next_mask, &head->masks, list) { |
| list_for_each_entry_safe(f, next, &mask->filters, list) { |
| if (__fl_delete(tp, f, extack)) |
| break; |
| } |
| } |
| idr_destroy(&head->handle_idr); |
| |
| __module_get(THIS_MODULE); |
| tcf_queue_work(&head->rwork, fl_destroy_sleepable); |
| } |
| |
| static void *fl_get(struct tcf_proto *tp, u32 handle) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| |
| return idr_find(&head->handle_idr, handle); |
| } |
| |
| static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { |
| [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, |
| [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, |
| [TCA_FLOWER_INDEV] = { .type = NLA_STRING, |
| .len = IFNAMSIZ }, |
| [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, |
| [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, |
| [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, |
| [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, |
| [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, |
| }; |
| |
| static const struct nla_policy |
| enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { |
| [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, |
| }; |
| |
| static const struct nla_policy |
| geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { |
| [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, |
| [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, |
| [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, |
| .len = 128 }, |
| }; |
| |
| static void fl_set_key_val(struct nlattr **tb, |
| void *val, int val_type, |
| void *mask, int mask_type, int len) |
| { |
| if (!tb[val_type]) |
| return; |
| memcpy(val, nla_data(tb[val_type]), len); |
| if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) |
| memset(mask, 0xff, len); |
| else |
| memcpy(mask, nla_data(tb[mask_type]), len); |
| } |
| |
| static int fl_set_key_mpls(struct nlattr **tb, |
| struct flow_dissector_key_mpls *key_val, |
| struct flow_dissector_key_mpls *key_mask) |
| { |
| if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { |
| key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); |
| key_mask->mpls_ttl = MPLS_TTL_MASK; |
| } |
| if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { |
| u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); |
| |
| if (bos & ~MPLS_BOS_MASK) |
| return -EINVAL; |
| key_val->mpls_bos = bos; |
| key_mask->mpls_bos = MPLS_BOS_MASK; |
| } |
| if (tb[TCA_FLOWER_KEY_MPLS_TC]) { |
| u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); |
| |
| if (tc & ~MPLS_TC_MASK) |
| return -EINVAL; |
| key_val->mpls_tc = tc; |
| key_mask->mpls_tc = MPLS_TC_MASK; |
| } |
| if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { |
| u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); |
| |
| if (label & ~MPLS_LABEL_MASK) |
| return -EINVAL; |
| key_val->mpls_label = label; |
| key_mask->mpls_label = MPLS_LABEL_MASK; |
| } |
| return 0; |
| } |
| |
| static void fl_set_key_vlan(struct nlattr **tb, |
| __be16 ethertype, |
| int vlan_id_key, int vlan_prio_key, |
| struct flow_dissector_key_vlan *key_val, |
| struct flow_dissector_key_vlan *key_mask) |
| { |
| #define VLAN_PRIORITY_MASK 0x7 |
| |
| if (tb[vlan_id_key]) { |
| key_val->vlan_id = |
| nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; |
| key_mask->vlan_id = VLAN_VID_MASK; |
| } |
| if (tb[vlan_prio_key]) { |
| key_val->vlan_priority = |
| nla_get_u8(tb[vlan_prio_key]) & |
| VLAN_PRIORITY_MASK; |
| key_mask->vlan_priority = VLAN_PRIORITY_MASK; |
| } |
| key_val->vlan_tpid = ethertype; |
| key_mask->vlan_tpid = cpu_to_be16(~0); |
| } |
| |
| static void fl_set_key_flag(u32 flower_key, u32 flower_mask, |
| u32 *dissector_key, u32 *dissector_mask, |
| u32 flower_flag_bit, u32 dissector_flag_bit) |
| { |
| if (flower_mask & flower_flag_bit) { |
| *dissector_mask |= dissector_flag_bit; |
| if (flower_key & flower_flag_bit) |
| *dissector_key |= dissector_flag_bit; |
| } |
| } |
| |
| static int fl_set_key_flags(struct nlattr **tb, |
| u32 *flags_key, u32 *flags_mask) |
| { |
| u32 key, mask; |
| |
| /* mask is mandatory for flags */ |
| if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) |
| return -EINVAL; |
| |
| key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); |
| mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); |
| |
| *flags_key = 0; |
| *flags_mask = 0; |
| |
| fl_set_key_flag(key, mask, flags_key, flags_mask, |
| TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); |
| fl_set_key_flag(key, mask, flags_key, flags_mask, |
| TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, |
| FLOW_DIS_FIRST_FRAG); |
| |
| return 0; |
| } |
| |
| static void fl_set_key_ip(struct nlattr **tb, bool encap, |
| struct flow_dissector_key_ip *key, |
| struct flow_dissector_key_ip *mask) |
| { |
| int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; |
| int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; |
| int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; |
| int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; |
| |
| fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); |
| fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); |
| } |
| |
| static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, |
| int depth, int option_len, |
| struct netlink_ext_ack *extack) |
| { |
| struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; |
| struct nlattr *class = NULL, *type = NULL, *data = NULL; |
| struct geneve_opt *opt; |
| int err, data_len = 0; |
| |
| if (option_len > sizeof(struct geneve_opt)) |
| data_len = option_len - sizeof(struct geneve_opt); |
| |
| opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; |
| memset(opt, 0xff, option_len); |
| opt->length = data_len / 4; |
| opt->r1 = 0; |
| opt->r2 = 0; |
| opt->r3 = 0; |
| |
| /* If no mask has been prodived we assume an exact match. */ |
| if (!depth) |
| return sizeof(struct geneve_opt) + data_len; |
| |
| if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { |
| NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); |
| return -EINVAL; |
| } |
| |
| err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, |
| nla, geneve_opt_policy, extack); |
| if (err < 0) |
| return err; |
| |
| /* We are not allowed to omit any of CLASS, TYPE or DATA |
| * fields from the key. |
| */ |
| if (!option_len && |
| (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || |
| !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || |
| !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { |
| NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); |
| return -EINVAL; |
| } |
| |
| /* Omitting any of CLASS, TYPE or DATA fields is allowed |
| * for the mask. |
| */ |
| if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { |
| int new_len = key->enc_opts.len; |
| |
| data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; |
| data_len = nla_len(data); |
| if (data_len < 4) { |
| NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); |
| return -ERANGE; |
| } |
| if (data_len % 4) { |
| NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); |
| return -ERANGE; |
| } |
| |
| new_len += sizeof(struct geneve_opt) + data_len; |
| BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); |
| if (new_len > FLOW_DIS_TUN_OPTS_MAX) { |
| NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); |
| return -ERANGE; |
| } |
| opt->length = data_len / 4; |
| memcpy(opt->opt_data, nla_data(data), data_len); |
| } |
| |
| if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { |
| class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; |
| opt->opt_class = nla_get_be16(class); |
| } |
| |
| if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { |
| type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; |
| opt->type = nla_get_u8(type); |
| } |
| |
| return sizeof(struct geneve_opt) + data_len; |
| } |
| |
| static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, |
| struct fl_flow_key *mask, |
| struct netlink_ext_ack *extack) |
| { |
| const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; |
| int err, option_len, key_depth, msk_depth = 0; |
| |
| err = nla_validate_nested(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(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], |
| TCA_FLOWER_KEY_ENC_OPTS_MAX, |
| enc_opts_policy, extack); |
| if (err) |
| return err; |
| |
| nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); |
| msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); |
| } |
| |
| nla_for_each_attr(nla_opt_key, nla_enc_key, |
| nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { |
| switch (nla_type(nla_opt_key)) { |
| case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: |
| option_len = 0; |
| key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; |
| option_len = fl_set_geneve_opt(nla_opt_key, key, |
| key_depth, option_len, |
| extack); |
| if (option_len < 0) |
| return option_len; |
| |
| key->enc_opts.len += option_len; |
| /* At the same time we need to parse through the mask |
| * in order to verify exact and mask attribute lengths. |
| */ |
| mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; |
| option_len = fl_set_geneve_opt(nla_opt_msk, mask, |
| msk_depth, option_len, |
| extack); |
| if (option_len < 0) |
| return option_len; |
| |
| mask->enc_opts.len += option_len; |
| if (key->enc_opts.len != mask->enc_opts.len) { |
| NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); |
| return -EINVAL; |
| } |
| |
| if (msk_depth) |
| nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); |
| break; |
| default: |
| NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int fl_set_key(struct net *net, struct nlattr **tb, |
| struct fl_flow_key *key, struct fl_flow_key *mask, |
| struct netlink_ext_ack *extack) |
| { |
| __be16 ethertype; |
| int ret = 0; |
| #ifdef CONFIG_NET_CLS_IND |
| if (tb[TCA_FLOWER_INDEV]) { |
| int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); |
| if (err < 0) |
| return err; |
| key->indev_ifindex = err; |
| mask->indev_ifindex = 0xffffffff; |
| } |
| #endif |
| |
| fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, |
| mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, |
| sizeof(key->eth.dst)); |
| fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, |
| mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, |
| sizeof(key->eth.src)); |
| |
| if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { |
| ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); |
| |
| if (eth_type_vlan(ethertype)) { |
| fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, |
| TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, |
| &mask->vlan); |
| |
| if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { |
| ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); |
| if (eth_type_vlan(ethertype)) { |
| fl_set_key_vlan(tb, ethertype, |
| TCA_FLOWER_KEY_CVLAN_ID, |
| TCA_FLOWER_KEY_CVLAN_PRIO, |
| &key->cvlan, &mask->cvlan); |
| fl_set_key_val(tb, &key->basic.n_proto, |
| TCA_FLOWER_KEY_CVLAN_ETH_TYPE, |
| &mask->basic.n_proto, |
| TCA_FLOWER_UNSPEC, |
| sizeof(key->basic.n_proto)); |
| } else { |
| key->basic.n_proto = ethertype; |
| mask->basic.n_proto = cpu_to_be16(~0); |
| } |
| } |
| } else { |
| key->basic.n_proto = ethertype; |
| mask->basic.n_proto = cpu_to_be16(~0); |
| } |
| } |
| |
| if (key->basic.n_proto == htons(ETH_P_IP) || |
| key->basic.n_proto == htons(ETH_P_IPV6)) { |
| fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, |
| &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, |
| sizeof(key->basic.ip_proto)); |
| fl_set_key_ip(tb, false, &key->ip, &mask->ip); |
| } |
| |
| if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { |
| key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; |
| mask->control.addr_type = ~0; |
| fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
| &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, |
| sizeof(key->ipv4.src)); |
| fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, |
| &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, |
| sizeof(key->ipv4.dst)); |
| } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { |
| key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; |
| mask->control.addr_type = ~0; |
| fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
| &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, |
| sizeof(key->ipv6.src)); |
| fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, |
| &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, |
| sizeof(key->ipv6.dst)); |
| } |
| |
| if (key->basic.ip_proto == IPPROTO_TCP) { |
| fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
| sizeof(key->tp.src)); |
| fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
| sizeof(key->tp.dst)); |
| fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, |
| &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, |
| sizeof(key->tcp.flags)); |
| } else if (key->basic.ip_proto == IPPROTO_UDP) { |
| fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
| sizeof(key->tp.src)); |
| fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
| sizeof(key->tp.dst)); |
| } else if (key->basic.ip_proto == IPPROTO_SCTP) { |
| fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, |
| sizeof(key->tp.src)); |
| fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, |
| sizeof(key->tp.dst)); |
| } else if (key->basic.n_proto == htons(ETH_P_IP) && |
| key->basic.ip_proto == IPPROTO_ICMP) { |
| fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, |
| &mask->icmp.type, |
| TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, |
| sizeof(key->icmp.type)); |
| fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, |
| &mask->icmp.code, |
| TCA_FLOWER_KEY_ICMPV4_CODE_MASK, |
| sizeof(key->icmp.code)); |
| } else if (key->basic.n_proto == htons(ETH_P_IPV6) && |
| key->basic.ip_proto == IPPROTO_ICMPV6) { |
| fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, |
| &mask->icmp.type, |
| TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, |
| sizeof(key->icmp.type)); |
| fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, |
| &mask->icmp.code, |
| TCA_FLOWER_KEY_ICMPV6_CODE_MASK, |
| sizeof(key->icmp.code)); |
| } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || |
| key->basic.n_proto == htons(ETH_P_MPLS_MC)) { |
| ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); |
| if (ret) |
| return ret; |
| } else if (key->basic.n_proto == htons(ETH_P_ARP) || |
| key->basic.n_proto == htons(ETH_P_RARP)) { |
| fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, |
| &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, |
| sizeof(key->arp.sip)); |
| fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, |
| &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, |
| sizeof(key->arp.tip)); |
| fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, |
| &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, |
| sizeof(key->arp.op)); |
| fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, |
| mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, |
| sizeof(key->arp.sha)); |
| fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, |
| mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, |
| sizeof(key->arp.tha)); |
| } |
| |
| if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || |
| tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { |
| key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; |
| mask->enc_control.addr_type = ~0; |
| fl_set_key_val(tb, &key->enc_ipv4.src, |
| TCA_FLOWER_KEY_ENC_IPV4_SRC, |
| &mask->enc_ipv4.src, |
| TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, |
| sizeof(key->enc_ipv4.src)); |
| fl_set_key_val(tb, &key->enc_ipv4.dst, |
| TCA_FLOWER_KEY_ENC_IPV4_DST, |
| &mask->enc_ipv4.dst, |
| TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, |
| sizeof(key->enc_ipv4.dst)); |
| } |
| |
| if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || |
| tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { |
| key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; |
| mask->enc_control.addr_type = ~0; |
| fl_set_key_val(tb, &key->enc_ipv6.src, |
| TCA_FLOWER_KEY_ENC_IPV6_SRC, |
| &mask->enc_ipv6.src, |
| TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, |
| sizeof(key->enc_ipv6.src)); |
| fl_set_key_val(tb, &key->enc_ipv6.dst, |
| TCA_FLOWER_KEY_ENC_IPV6_DST, |
| &mask->enc_ipv6.dst, |
| TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, |
| sizeof(key->enc_ipv6.dst)); |
| } |
| |
| fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, |
| &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, |
| sizeof(key->enc_key_id.keyid)); |
| |
| fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, |
| &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, |
| sizeof(key->enc_tp.src)); |
| |
| fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, |
| &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, |
| sizeof(key->enc_tp.dst)); |
| |
| fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); |
| |
| if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { |
| ret = fl_set_enc_opt(tb, key, mask, extack); |
| if (ret) |
| return ret; |
| } |
| |
| if (tb[TCA_FLOWER_KEY_FLAGS]) |
| ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); |
| |
| return ret; |
| } |
| |
| static void fl_mask_copy(struct fl_flow_mask *dst, |
| struct fl_flow_mask *src) |
| { |
| const void *psrc = fl_key_get_start(&src->key, src); |
| void *pdst = fl_key_get_start(&dst->key, src); |
| |
| memcpy(pdst, psrc, fl_mask_range(src)); |
| dst->range = src->range; |
| } |
| |
| static const struct rhashtable_params fl_ht_params = { |
| .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ |
| .head_offset = offsetof(struct cls_fl_filter, ht_node), |
| .automatic_shrinking = true, |
| }; |
| |
| static int fl_init_mask_hashtable(struct fl_flow_mask *mask) |
| { |
| mask->filter_ht_params = fl_ht_params; |
| mask->filter_ht_params.key_len = fl_mask_range(mask); |
| mask->filter_ht_params.key_offset += mask->range.start; |
| |
| return rhashtable_init(&mask->ht, &mask->filter_ht_params); |
| } |
| |
| #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) |
| #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) |
| |
| #define FL_KEY_IS_MASKED(mask, member) \ |
| memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ |
| 0, FL_KEY_MEMBER_SIZE(member)) \ |
| |
| #define FL_KEY_SET(keys, cnt, id, member) \ |
| do { \ |
| keys[cnt].key_id = id; \ |
| keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ |
| cnt++; \ |
| } while(0); |
| |
| #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ |
| do { \ |
| if (FL_KEY_IS_MASKED(mask, member)) \ |
| FL_KEY_SET(keys, cnt, id, member); \ |
| } while(0); |
| |
| static void fl_init_dissector(struct flow_dissector *dissector, |
| struct fl_flow_key *mask) |
| { |
| struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; |
| size_t cnt = 0; |
| |
| FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); |
| FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_PORTS, tp); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_IP, ip); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_TCP, tcp); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ICMP, icmp); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ARP, arp); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_MPLS, mpls); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_VLAN, vlan); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_CVLAN, cvlan); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); |
| if (FL_KEY_IS_MASKED(mask, enc_ipv4) || |
| FL_KEY_IS_MASKED(mask, enc_ipv6)) |
| FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, |
| enc_control); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); |
| FL_KEY_SET_IF_MASKED(mask, keys, cnt, |
| FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); |
| |
| skb_flow_dissector_init(dissector, keys, cnt); |
| } |
| |
| static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, |
| struct fl_flow_mask *mask) |
| { |
| struct fl_flow_mask *newmask; |
| int err; |
| |
| newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); |
| if (!newmask) |
| return ERR_PTR(-ENOMEM); |
| |
| fl_mask_copy(newmask, mask); |
| |
| err = fl_init_mask_hashtable(newmask); |
| if (err) |
| goto errout_free; |
| |
| fl_init_dissector(&newmask->dissector, &newmask->key); |
| |
| INIT_LIST_HEAD_RCU(&newmask->filters); |
| |
| err = rhashtable_insert_fast(&head->ht, &newmask->ht_node, |
| mask_ht_params); |
| if (err) |
| goto errout_destroy; |
| |
| list_add_tail_rcu(&newmask->list, &head->masks); |
| |
| return newmask; |
| |
| errout_destroy: |
| rhashtable_destroy(&newmask->ht); |
| errout_free: |
| kfree(newmask); |
| |
| return ERR_PTR(err); |
| } |
| |
| static int fl_check_assign_mask(struct cls_fl_head *head, |
| struct cls_fl_filter *fnew, |
| struct cls_fl_filter *fold, |
| struct fl_flow_mask *mask) |
| { |
| struct fl_flow_mask *newmask; |
| |
| fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params); |
| if (!fnew->mask) { |
| if (fold) |
| return -EINVAL; |
| |
| newmask = fl_create_new_mask(head, mask); |
| if (IS_ERR(newmask)) |
| return PTR_ERR(newmask); |
| |
| fnew->mask = newmask; |
| } else if (fold && fold->mask != fnew->mask) { |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int fl_set_parms(struct net *net, struct tcf_proto *tp, |
| struct cls_fl_filter *f, struct fl_flow_mask *mask, |
| unsigned long base, struct nlattr **tb, |
| struct nlattr *est, bool ovr, |
| struct fl_flow_tmplt *tmplt, |
| struct netlink_ext_ack *extack) |
| { |
| int err; |
| |
| err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack); |
| if (err < 0) |
| return err; |
| |
| if (tb[TCA_FLOWER_CLASSID]) { |
| f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); |
| tcf_bind_filter(tp, &f->res, base); |
| } |
| |
| err = fl_set_key(net, tb, &f->key, &mask->key, extack); |
| if (err) |
| return err; |
| |
| fl_mask_update_range(mask); |
| fl_set_masked_key(&f->mkey, &f->key, mask); |
| |
| 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_change(struct net *net, struct sk_buff *in_skb, |
| struct tcf_proto *tp, unsigned long base, |
| u32 handle, struct nlattr **tca, |
| void **arg, bool ovr, struct netlink_ext_ack *extack) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| struct cls_fl_filter *fold = *arg; |
| struct cls_fl_filter *fnew; |
| struct fl_flow_mask *mask; |
| struct nlattr **tb; |
| int err; |
| |
| if (!tca[TCA_OPTIONS]) |
| return -EINVAL; |
| |
| mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); |
| if (!mask) |
| return -ENOBUFS; |
| |
| tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); |
| if (!tb) { |
| err = -ENOBUFS; |
| goto errout_mask_alloc; |
| } |
| |
| err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], |
| fl_policy, NULL); |
| if (err < 0) |
| goto errout_tb; |
| |
| if (fold && handle && fold->handle != handle) { |
| err = -EINVAL; |
| goto errout_tb; |
| } |
| |
| fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); |
| if (!fnew) { |
| err = -ENOBUFS; |
| goto errout_tb; |
| } |
| |
| err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); |
| if (err < 0) |
| goto errout; |
| |
| if (tb[TCA_FLOWER_FLAGS]) { |
| fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); |
| |
| if (!tc_flags_valid(fnew->flags)) { |
| err = -EINVAL; |
| goto errout; |
| } |
| } |
| |
| err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, |
| tp->chain->tmplt_priv, extack); |
| if (err) |
| goto errout; |
| |
| err = fl_check_assign_mask(head, fnew, fold, mask); |
| if (err) |
| goto errout; |
| |
| if (!handle) { |
| handle = 1; |
| err = idr_alloc_u32(&head->handle_idr, fnew, &handle, |
| INT_MAX, GFP_KERNEL); |
| } else if (!fold) { |
| /* user specifies a handle and it doesn't exist */ |
| err = idr_alloc_u32(&head->handle_idr, fnew, &handle, |
| handle, GFP_KERNEL); |
| } |
| if (err) |
| goto errout_mask; |
| fnew->handle = handle; |
| |
| if (!tc_skip_sw(fnew->flags)) { |
| if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) { |
| err = -EEXIST; |
| goto errout_idr; |
| } |
| |
| err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, |
| fnew->mask->filter_ht_params); |
| if (err) |
| goto errout_idr; |
| } |
| |
| if (!tc_skip_hw(fnew->flags)) { |
| err = fl_hw_replace_filter(tp, fnew, extack); |
| if (err) |
| goto errout_mask; |
| } |
| |
| if (!tc_in_hw(fnew->flags)) |
| fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; |
| |
| if (fold) { |
| if (!tc_skip_sw(fold->flags)) |
| rhashtable_remove_fast(&fold->mask->ht, |
| &fold->ht_node, |
| fold->mask->filter_ht_params); |
| if (!tc_skip_hw(fold->flags)) |
| fl_hw_destroy_filter(tp, fold, NULL); |
| } |
| |
| *arg = fnew; |
| |
| if (fold) { |
| idr_replace(&head->handle_idr, fnew, fnew->handle); |
| list_replace_rcu(&fold->list, &fnew->list); |
| tcf_unbind_filter(tp, &fold->res); |
| tcf_exts_get_net(&fold->exts); |
| tcf_queue_work(&fold->rwork, fl_destroy_filter_work); |
| } else { |
| list_add_tail_rcu(&fnew->list, &fnew->mask->filters); |
| } |
| |
| kfree(tb); |
| kfree(mask); |
| return 0; |
| |
| errout_idr: |
| if (!fold) |
| idr_remove(&head->handle_idr, fnew->handle); |
| |
| errout_mask: |
| fl_mask_put(head, fnew->mask, false); |
| |
| errout: |
| tcf_exts_destroy(&fnew->exts); |
| kfree(fnew); |
| errout_tb: |
| kfree(tb); |
| errout_mask_alloc: |
| kfree(mask); |
| return err; |
| } |
| |
| static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, |
| struct netlink_ext_ack *extack) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| struct cls_fl_filter *f = arg; |
| |
| if (!tc_skip_sw(f->flags)) |
| rhashtable_remove_fast(&f->mask->ht, &f->ht_node, |
| f->mask->filter_ht_params); |
| __fl_delete(tp, f, extack); |
| *last = list_empty(&head->masks); |
| return 0; |
| } |
| |
| static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| struct cls_fl_filter *f; |
| |
| arg->count = arg->skip; |
| |
| while ((f = idr_get_next_ul(&head->handle_idr, |
| &arg->cookie)) != NULL) { |
| if (arg->fn(tp, f, arg) < 0) { |
| arg->stop = 1; |
| break; |
| } |
| arg->cookie = f->handle + 1; |
| arg->count++; |
| } |
| } |
| |
| static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, |
| void *cb_priv, struct netlink_ext_ack *extack) |
| { |
| struct cls_fl_head *head = rtnl_dereference(tp->root); |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = tp->chain->block; |
| struct fl_flow_mask *mask; |
| struct cls_fl_filter *f; |
| int err; |
| |
| list_for_each_entry(mask, &head->masks, list) { |
| list_for_each_entry(f, &mask->filters, list) { |
| if (tc_skip_hw(f->flags)) |
| continue; |
| |
| tc_cls_common_offload_init(&cls_flower.common, tp, |
| f->flags, extack); |
| cls_flower.command = add ? |
| TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; |
| cls_flower.cookie = (unsigned long)f; |
| cls_flower.dissector = &mask->dissector; |
| cls_flower.mask = &mask->key; |
| cls_flower.key = &f->mkey; |
| cls_flower.exts = &f->exts; |
| cls_flower.classid = f->res.classid; |
| |
| err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); |
| if (err) { |
| if (add && tc_skip_sw(f->flags)) |
| return err; |
| continue; |
| } |
| |
| tc_cls_offload_cnt_update(block, &f->in_hw_count, |
| &f->flags, add); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void fl_hw_create_tmplt(struct tcf_chain *chain, |
| struct fl_flow_tmplt *tmplt) |
| { |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = chain->block; |
| struct tcf_exts dummy_exts = { 0, }; |
| |
| cls_flower.common.chain_index = chain->index; |
| cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; |
| cls_flower.cookie = (unsigned long) tmplt; |
| cls_flower.dissector = &tmplt->dissector; |
| cls_flower.mask = &tmplt->mask; |
| cls_flower.key = &tmplt->dummy_key; |
| cls_flower.exts = &dummy_exts; |
| |
| /* 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, NULL, TC_SETUP_CLSFLOWER, |
| &cls_flower, false); |
| } |
| |
| static void fl_hw_destroy_tmplt(struct tcf_chain *chain, |
| struct fl_flow_tmplt *tmplt) |
| { |
| struct tc_cls_flower_offload cls_flower = {}; |
| struct tcf_block *block = chain->block; |
| |
| cls_flower.common.chain_index = chain->index; |
| cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; |
| cls_flower.cookie = (unsigned long) tmplt; |
| |
| tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, |
| &cls_flower, false); |
| } |
| |
| static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, |
| struct nlattr **tca, |
| struct netlink_ext_ack *extack) |
| { |
| struct fl_flow_tmplt *tmplt; |
| struct nlattr **tb; |
| int err; |
| |
| if (!tca[TCA_OPTIONS]) |
| return ERR_PTR(-EINVAL); |
| |
| tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); |
| if (!tb) |
| return ERR_PTR(-ENOBUFS); |
| err = nla_parse_nested(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; |
| kfree(tb); |
| |
| fl_init_dissector(&tmplt->dissector, &tmplt->mask); |
| |
| fl_hw_create_tmplt(chain, tmplt); |
| |
| 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_mpls(struct sk_buff *skb, |
| struct flow_dissector_key_mpls *mpls_key, |
| struct flow_dissector_key_mpls *mpls_mask) |
| { |
| int err; |
| |
| if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) |
| return 0; |
| if (mpls_mask->mpls_ttl) { |
| err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, |
| mpls_key->mpls_ttl); |
| if (err) |
| return err; |
| } |
| if (mpls_mask->mpls_tc) { |
| err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, |
| mpls_key->mpls_tc); |
| if (err) |
| return err; |
| } |
| if (mpls_mask->mpls_label) { |
| err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, |
| mpls_key->mpls_label); |
| if (err) |
| return err; |
| } |
| if (mpls_mask->mpls_bos) { |
| err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, |
| mpls_key->mpls_bos); |
| if (err) |
| return err; |
| } |
| return 0; |
| } |
| |
| static int fl_dump_key_ip(struct sk_buff *skb, bool encap, |
| struct flow_dissector_key_ip *key, |
| struct flow_dissector_key_ip *mask) |
| { |
| int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; |
| int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; |
| int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; |
| int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; |
| |
| if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || |
| fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int fl_dump_key_vlan(struct sk_buff *skb, |
| int vlan_id_key, int vlan_prio_key, |
| struct flow_dissector_key_vlan *vlan_key, |
| struct flow_dissector_key_vlan *vlan_mask) |
| { |
| int err; |
| |
| if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) |
| return 0; |
| if (vlan_mask->vlan_id) { |
| err = nla_put_u16(skb, vlan_id_key, |
| vlan_key->vlan_id); |
| if (err) |
| return err; |
| } |
| if (vlan_mask->vlan_priority) { |
| err = nla_put_u8(skb, vlan_prio_key, |
| vlan_key->vlan_priority); |
| if (err) |
| return err; |
| } |
| return 0; |
| } |
| |
| static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, |
| u32 *flower_key, u32 *flower_mask, |
| u32 flower_flag_bit, u32 dissector_flag_bit) |
| { |
| if (dissector_mask & dissector_flag_bit) { |
| *flower_mask |= flower_flag_bit; |
| if (dissector_key & dissector_flag_bit) |
| *flower_key |= flower_flag_bit; |
| } |
| } |
| |
| static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) |
| { |
| u32 key, mask; |
| __be32 _key, _mask; |
| int err; |
| |
| if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) |
| return 0; |
| |
| key = 0; |
| mask = 0; |
| |
| fl_get_key_flag(flags_key, flags_mask, &key, &mask, |
| TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); |
| fl_get_key_flag(flags_key, flags_mask, &key, &mask, |
| TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, |
| FLOW_DIS_FIRST_FRAG); |
| |
| _key = cpu_to_be32(key); |
| _mask = cpu_to_be32(mask); |
| |
| err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); |
| if (err) |
| return err; |
| |
| return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); |
| } |
| |
| static int fl_dump_key_geneve_opt(struct sk_buff *skb, |
| struct flow_dissector_key_enc_opts *enc_opts) |
| { |
| struct geneve_opt *opt; |
| struct nlattr *nest; |
| int opt_off = 0; |
| |
| nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); |
| if (!nest) |
| goto nla_put_failure; |
| |
| while (enc_opts->len > opt_off) { |
| opt = (struct geneve_opt *)&enc_opts->data[opt_off]; |
| |
| if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, |
| opt->opt_class)) |
| goto nla_put_failure; |
| if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, |
| opt->type)) |
| goto nla_put_failure; |
| if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, |
| opt->length * 4, opt->opt_data)) |
| goto nla_put_failure; |
| |
| opt_off += sizeof(struct geneve_opt) + opt->length * 4; |
| } |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, |
| struct flow_dissector_key_enc_opts *enc_opts) |
| { |
| struct nlattr *nest; |
| int err; |
| |
| if (!enc_opts->len) |
| return 0; |
| |
| nest = nla_nest_start(skb, enc_opt_type); |
| if (!nest) |
| goto nla_put_failure; |
| |
| switch (enc_opts->dst_opt_type) { |
| case TUNNEL_GENEVE_OPT: |
| err = fl_dump_key_geneve_opt(skb, enc_opts); |
| if (err) |
| goto nla_put_failure; |
| break; |
| default: |
| goto nla_put_failure; |
| } |
| nla_nest_end(skb, nest); |
| return 0; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| static int fl_dump_key_enc_opt(struct sk_buff *skb, |
| struct flow_dissector_key_enc_opts *key_opts, |
| struct flow_dissector_key_enc_opts *msk_opts) |
| { |
| int err; |
| |
| err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); |
| if (err) |
| return err; |
| |
| return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); |
| } |
| |
| static int fl_dump_key(struct sk_buff *skb, struct net *net, |
| struct fl_flow_key *key, struct fl_flow_key *mask) |
| { |
| if (mask->indev_ifindex) { |
| struct net_device *dev; |
| |
| dev = __dev_get_by_index(net, key->indev_ifindex); |
| if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) |
| goto nla_put_failure; |
| } |
| |
| if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, |
| mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, |
| sizeof(key->eth.dst)) || |
| fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, |
| mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, |
| sizeof(key->eth.src)) || |
| fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, |
| &mask->basic.n_proto, TCA_FLOWER_UNSPEC, |
| sizeof(key->basic.n_proto))) |
| goto nla_put_failure; |
| |
| if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) |
| goto nla_put_failure; |
| |
| if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, |
| TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) |
| goto nla_put_failure; |
| |
| if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, |
| TCA_FLOWER_KEY_CVLAN_PRIO, |
| &key->cvlan, &mask->cvlan) || |
| (mask->cvlan.vlan_tpid && |
| nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, |
| key->cvlan.vlan_tpid))) |
| goto nla_put_failure; |
| |
| if (mask->basic.n_proto) { |
| if (mask->cvlan.vlan_tpid) { |
| if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, |
| key->basic.n_proto)) |
| goto nla_put_failure; |
| } else if (mask->vlan.vlan_tpid) { |
| if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, |
| key->basic.n_proto)) |
| goto nla_put_failure; |
| } |
| } |
| |
| if ((key->basic.n_proto == htons(ETH_P_IP) || |
| key->basic.n_proto == htons(ETH_P_IPV6)) && |
| (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, |
| &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, |
| sizeof(key->basic.ip_proto)) || |
| fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) |
| goto nla_put_failure; |
| |
| if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
| (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, |
| &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, |
| sizeof(key->ipv4.src)) || |
| fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, |
| &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, |
| sizeof(key->ipv4.dst)))) |
| goto nla_put_failure; |
| else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && |
| (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, |
| &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, |
| sizeof(key->ipv6.src)) || |
| fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, |
| &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, |
| sizeof(key->ipv6.dst)))) |
| goto nla_put_failure; |
| |
| if (key->basic.ip_proto == IPPROTO_TCP && |
| (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, |
| sizeof(key->tp.src)) || |
| fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, |
| sizeof(key->tp.dst)) || |
| fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, |
| &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, |
| sizeof(key->tcp.flags)))) |
| goto nla_put_failure; |
| else if (key->basic.ip_proto == IPPROTO_UDP && |
| (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, |
| sizeof(key->tp.src)) || |
| fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, |
| sizeof(key->tp.dst)))) |
| goto nla_put_failure; |
| else if (key->basic.ip_proto == IPPROTO_SCTP && |
| (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, |
| &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, |
| sizeof(key->tp.src)) || |
| fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, |
| &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, |
| sizeof(key->tp.dst)))) |
| goto nla_put_failure; |
| else if (key->basic.n_proto == htons(ETH_P_IP) && |
| key->basic.ip_proto == IPPROTO_ICMP && |
| (fl_dump_key_val(skb, &key->icmp.type, |
| TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, |
| TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, |
| sizeof(key->icmp.type)) || |
| fl_dump_key_val(skb, &key->icmp.code, |
| TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, |
| TCA_FLOWER_KEY_ICMPV4_CODE_MASK, |
| sizeof(key->icmp.code)))) |
| goto nla_put_failure; |
| else if (key->basic.n_proto == htons(ETH_P_IPV6) && |
| key->basic.ip_proto == IPPROTO_ICMPV6 && |
| (fl_dump_key_val(skb, &key->icmp.type, |
| TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, |
| TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, |
| sizeof(key->icmp.type)) || |
| fl_dump_key_val(skb, &key->icmp.code, |
| TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, |
| TCA_FLOWER_KEY_ICMPV6_CODE_MASK, |
| sizeof(key->icmp.code)))) |
| goto nla_put_failure; |
| else if ((key->basic.n_proto == htons(ETH_P_ARP) || |
| key->basic.n_proto == htons(ETH_P_RARP)) && |
| (fl_dump_key_val(skb, &key->arp.sip, |
| TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, |
| TCA_FLOWER_KEY_ARP_SIP_MASK, |
| sizeof(key->arp.sip)) || |
| fl_dump_key_val(skb, &key->arp.tip, |
| TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, |
| TCA_FLOWER_KEY_ARP_TIP_MASK, |
| sizeof(key->arp.tip)) || |
| fl_dump_key_val(skb, &key->arp.op, |
| TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, |
| TCA_FLOWER_KEY_ARP_OP_MASK, |
| sizeof(key->arp.op)) || |
| fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, |
| mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, |
| sizeof(key->arp.sha)) || |
| fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, |
| mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, |
| sizeof(key->arp.tha)))) |
| goto nla_put_failure; |
| |
| if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && |
| (fl_dump_key_val(skb, &key->enc_ipv4.src, |
| TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, |
| TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, |
| sizeof(key->enc_ipv4.src)) || |
| fl_dump_key_val(skb, &key->enc_ipv4.dst, |
| TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, |
| TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, |
| sizeof(key->enc_ipv4.dst)))) |
| goto nla_put_failure; |
| else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && |
| (fl_dump_key_val(skb, &key->enc_ipv6.src, |
| TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, |
| TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, |
| sizeof(key->enc_ipv6.src)) || |
| fl_dump_key_val(skb, &key->enc_ipv6.dst, |
| TCA_FLOWER_KEY_ENC_IPV6_DST, |
| &mask->enc_ipv6.dst, |
| TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, |
| sizeof(key->enc_ipv6.dst)))) |
| goto nla_put_failure; |
| |
| if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, |
| &mask->enc_key_id, TCA_FLOWER_UNSPEC, |
| sizeof(key->enc_key_id)) || |
| fl_dump_key_val(skb, &key->enc_tp.src, |
| TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, |
| &mask->enc_tp.src, |
| TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, |
| sizeof(key->enc_tp.src)) || |
| fl_dump_key_val(skb, &key->enc_tp.dst, |
| TCA_FLOWER_KEY_ENC_UDP_DST_PORT, |
| &mask->enc_tp.dst, |
| TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, |
| sizeof(key->enc_tp.dst)) || |
| fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || |
| fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) |
| goto nla_put_failure; |
| |
| if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) |
| goto nla_put_failure; |
| |
| return 0; |
| |
| nla_put_failure: |
| return -EMSGSIZE; |
| } |
| |
| static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, |
| struct sk_buff *skb, struct tcmsg *t) |
| { |
| struct cls_fl_filter *f = fh; |
| struct nlattr *nest; |
| struct fl_flow_key *key, *mask; |
| |
| if (!f) |
| return skb->len; |
| |
| t->tcm_handle = f->handle; |
| |
| nest = nla_nest_start(skb, TCA_OPTIONS); |
| if (!nest) |
| goto nla_put_failure; |
| |
| if (f->res.classid && |
| nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) |
| goto nla_put_failure; |
| |
| key = &f->key; |
| mask = &f->mask->key; |
| |
| if (fl_dump_key(skb, net, key, mask)) |
| goto nla_put_failure; |
| |
| if (!tc_skip_hw(f->flags)) |
| fl_hw_update_stats(tp, f); |
| |
| if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) |
| goto nla_put_failure; |
| |
| if (tcf_exts_dump(skb, &f->exts)) |
| goto nla_put_failure; |
| |
| nla_nest_end(skb, nest); |
| |
| if (tcf_exts_dump_stats(skb, &f->exts) < 0) |
| goto nla_put_failure; |
| |
| return skb->len; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -1; |
| } |
| |
| static 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(skb, TCA_OPTIONS); |
| if (!nest) |
| goto nla_put_failure; |
| |
| key = &tmplt->dummy_key; |
| mask = &tmplt->mask; |
| |
| if (fl_dump_key(skb, net, key, mask)) |
| goto nla_put_failure; |
| |
| nla_nest_end(skb, nest); |
| |
| return skb->len; |
| |
| nla_put_failure: |
| nla_nest_cancel(skb, nest); |
| return -EMSGSIZE; |
| } |
| |
| static void fl_bind_class(void *fh, u32 classid, unsigned long cl) |
| { |
| struct cls_fl_filter *f = fh; |
| |
| if (f && f->res.classid == classid) |
| f->res.class = cl; |
| } |
| |
| static struct tcf_proto_ops cls_fl_ops __read_mostly = { |
| .kind = "flower", |
| .classify = fl_classify, |
| .init = fl_init, |
| .destroy = fl_destroy, |
| .get = fl_get, |
| .change = fl_change, |
| .delete = fl_delete, |
| .walk = fl_walk, |
| .reoffload = fl_reoffload, |
| .dump = fl_dump, |
| .bind_class = fl_bind_class, |
| .tmplt_create = fl_tmplt_create, |
| .tmplt_destroy = fl_tmplt_destroy, |
| .tmplt_dump = fl_tmplt_dump, |
| .owner = THIS_MODULE, |
| }; |
| |
| 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"); |