1ccb1352eSJesse Gross /* 203f0d916SAndy Zhou * Copyright (c) 2007-2013 Nicira, Inc. 3ccb1352eSJesse Gross * 4ccb1352eSJesse Gross * This program is free software; you can redistribute it and/or 5ccb1352eSJesse Gross * modify it under the terms of version 2 of the GNU General Public 6ccb1352eSJesse Gross * License as published by the Free Software Foundation. 7ccb1352eSJesse Gross * 8ccb1352eSJesse Gross * This program is distributed in the hope that it will be useful, but 9ccb1352eSJesse Gross * WITHOUT ANY WARRANTY; without even the implied warranty of 10ccb1352eSJesse Gross * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11ccb1352eSJesse Gross * General Public License for more details. 12ccb1352eSJesse Gross * 13ccb1352eSJesse Gross * You should have received a copy of the GNU General Public License 14ccb1352eSJesse Gross * along with this program; if not, write to the Free Software 15ccb1352eSJesse Gross * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 16ccb1352eSJesse Gross * 02110-1301, USA 17ccb1352eSJesse Gross */ 18ccb1352eSJesse Gross 19ccb1352eSJesse Gross #include "flow.h" 20ccb1352eSJesse Gross #include "datapath.h" 21ccb1352eSJesse Gross #include <linux/uaccess.h> 22ccb1352eSJesse Gross #include <linux/netdevice.h> 23ccb1352eSJesse Gross #include <linux/etherdevice.h> 24ccb1352eSJesse Gross #include <linux/if_ether.h> 25ccb1352eSJesse Gross #include <linux/if_vlan.h> 26ccb1352eSJesse Gross #include <net/llc_pdu.h> 27ccb1352eSJesse Gross #include <linux/kernel.h> 28ccb1352eSJesse Gross #include <linux/jhash.h> 29ccb1352eSJesse Gross #include <linux/jiffies.h> 30ccb1352eSJesse Gross #include <linux/llc.h> 31ccb1352eSJesse Gross #include <linux/module.h> 32ccb1352eSJesse Gross #include <linux/in.h> 33ccb1352eSJesse Gross #include <linux/rcupdate.h> 34ccb1352eSJesse Gross #include <linux/if_arp.h> 35ccb1352eSJesse Gross #include <linux/ip.h> 36ccb1352eSJesse Gross #include <linux/ipv6.h> 37a175a723SJoe Stringer #include <linux/sctp.h> 38ccb1352eSJesse Gross #include <linux/tcp.h> 39ccb1352eSJesse Gross #include <linux/udp.h> 40ccb1352eSJesse Gross #include <linux/icmp.h> 41ccb1352eSJesse Gross #include <linux/icmpv6.h> 42ccb1352eSJesse Gross #include <linux/rculist.h> 43ccb1352eSJesse Gross #include <net/ip.h> 447d5437c7SPravin B Shelar #include <net/ip_tunnels.h> 45ccb1352eSJesse Gross #include <net/ipv6.h> 46ccb1352eSJesse Gross #include <net/ndisc.h> 47ccb1352eSJesse Gross 48ccb1352eSJesse Gross static struct kmem_cache *flow_cache; 49ccb1352eSJesse Gross 5003f0d916SAndy Zhou static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, 5103f0d916SAndy Zhou struct sw_flow_key_range *range, u8 val); 5203f0d916SAndy Zhou 5303f0d916SAndy Zhou static void update_range__(struct sw_flow_match *match, 5403f0d916SAndy Zhou size_t offset, size_t size, bool is_mask) 5503f0d916SAndy Zhou { 5603f0d916SAndy Zhou struct sw_flow_key_range *range = NULL; 57*5828cd9aSAndy Zhou size_t start = rounddown(offset, sizeof(long)); 58*5828cd9aSAndy Zhou size_t end = roundup(offset + size, sizeof(long)); 5903f0d916SAndy Zhou 6003f0d916SAndy Zhou if (!is_mask) 6103f0d916SAndy Zhou range = &match->range; 6203f0d916SAndy Zhou else if (match->mask) 6303f0d916SAndy Zhou range = &match->mask->range; 6403f0d916SAndy Zhou 6503f0d916SAndy Zhou if (!range) 6603f0d916SAndy Zhou return; 6703f0d916SAndy Zhou 6803f0d916SAndy Zhou if (range->start == range->end) { 6903f0d916SAndy Zhou range->start = start; 7003f0d916SAndy Zhou range->end = end; 7103f0d916SAndy Zhou return; 7203f0d916SAndy Zhou } 7303f0d916SAndy Zhou 7403f0d916SAndy Zhou if (range->start > start) 7503f0d916SAndy Zhou range->start = start; 7603f0d916SAndy Zhou 7703f0d916SAndy Zhou if (range->end < end) 7803f0d916SAndy Zhou range->end = end; 7903f0d916SAndy Zhou } 8003f0d916SAndy Zhou 8103f0d916SAndy Zhou #define SW_FLOW_KEY_PUT(match, field, value, is_mask) \ 8203f0d916SAndy Zhou do { \ 8303f0d916SAndy Zhou update_range__(match, offsetof(struct sw_flow_key, field), \ 8403f0d916SAndy Zhou sizeof((match)->key->field), is_mask); \ 8503f0d916SAndy Zhou if (is_mask) { \ 8603f0d916SAndy Zhou if ((match)->mask) \ 8703f0d916SAndy Zhou (match)->mask->key.field = value; \ 8803f0d916SAndy Zhou } else { \ 8903f0d916SAndy Zhou (match)->key->field = value; \ 9003f0d916SAndy Zhou } \ 9103f0d916SAndy Zhou } while (0) 9203f0d916SAndy Zhou 9303f0d916SAndy Zhou #define SW_FLOW_KEY_MEMCPY(match, field, value_p, len, is_mask) \ 9403f0d916SAndy Zhou do { \ 9503f0d916SAndy Zhou update_range__(match, offsetof(struct sw_flow_key, field), \ 9603f0d916SAndy Zhou len, is_mask); \ 9703f0d916SAndy Zhou if (is_mask) { \ 9803f0d916SAndy Zhou if ((match)->mask) \ 9903f0d916SAndy Zhou memcpy(&(match)->mask->key.field, value_p, len);\ 10003f0d916SAndy Zhou } else { \ 10103f0d916SAndy Zhou memcpy(&(match)->key->field, value_p, len); \ 10203f0d916SAndy Zhou } \ 10303f0d916SAndy Zhou } while (0) 10403f0d916SAndy Zhou 105*5828cd9aSAndy Zhou static u16 range_n_bytes(const struct sw_flow_key_range *range) 106*5828cd9aSAndy Zhou { 107*5828cd9aSAndy Zhou return range->end - range->start; 108*5828cd9aSAndy Zhou } 109*5828cd9aSAndy Zhou 11003f0d916SAndy Zhou void ovs_match_init(struct sw_flow_match *match, 11103f0d916SAndy Zhou struct sw_flow_key *key, 11203f0d916SAndy Zhou struct sw_flow_mask *mask) 11303f0d916SAndy Zhou { 11403f0d916SAndy Zhou memset(match, 0, sizeof(*match)); 11503f0d916SAndy Zhou match->key = key; 11603f0d916SAndy Zhou match->mask = mask; 11703f0d916SAndy Zhou 11803f0d916SAndy Zhou memset(key, 0, sizeof(*key)); 11903f0d916SAndy Zhou 12003f0d916SAndy Zhou if (mask) { 12103f0d916SAndy Zhou memset(&mask->key, 0, sizeof(mask->key)); 12203f0d916SAndy Zhou mask->range.start = mask->range.end = 0; 12303f0d916SAndy Zhou } 12403f0d916SAndy Zhou } 12503f0d916SAndy Zhou 12603f0d916SAndy Zhou static bool ovs_match_validate(const struct sw_flow_match *match, 12703f0d916SAndy Zhou u64 key_attrs, u64 mask_attrs) 12803f0d916SAndy Zhou { 12903f0d916SAndy Zhou u64 key_expected = 1 << OVS_KEY_ATTR_ETHERNET; 13003f0d916SAndy Zhou u64 mask_allowed = key_attrs; /* At most allow all key attributes */ 13103f0d916SAndy Zhou 13203f0d916SAndy Zhou /* The following mask attributes allowed only if they 13303f0d916SAndy Zhou * pass the validation tests. */ 13403f0d916SAndy Zhou mask_allowed &= ~((1 << OVS_KEY_ATTR_IPV4) 13503f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_IPV6) 13603f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_TCP) 13703f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_UDP) 138a175a723SJoe Stringer | (1 << OVS_KEY_ATTR_SCTP) 13903f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_ICMP) 14003f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_ICMPV6) 14103f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_ARP) 14203f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_ND)); 14303f0d916SAndy Zhou 14403f0d916SAndy Zhou /* Always allowed mask fields. */ 14503f0d916SAndy Zhou mask_allowed |= ((1 << OVS_KEY_ATTR_TUNNEL) 14603f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_IN_PORT) 14703f0d916SAndy Zhou | (1 << OVS_KEY_ATTR_ETHERTYPE)); 14803f0d916SAndy Zhou 14903f0d916SAndy Zhou /* Check key attributes. */ 15003f0d916SAndy Zhou if (match->key->eth.type == htons(ETH_P_ARP) 15103f0d916SAndy Zhou || match->key->eth.type == htons(ETH_P_RARP)) { 15203f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_ARP; 15303f0d916SAndy Zhou if (match->mask && (match->mask->key.eth.type == htons(0xffff))) 15403f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_ARP; 15503f0d916SAndy Zhou } 15603f0d916SAndy Zhou 15703f0d916SAndy Zhou if (match->key->eth.type == htons(ETH_P_IP)) { 15803f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_IPV4; 15903f0d916SAndy Zhou if (match->mask && (match->mask->key.eth.type == htons(0xffff))) 16003f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_IPV4; 16103f0d916SAndy Zhou 16203f0d916SAndy Zhou if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { 16303f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_UDP) { 16403f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_UDP; 16503f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 16603f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_UDP; 16703f0d916SAndy Zhou } 16803f0d916SAndy Zhou 169a175a723SJoe Stringer if (match->key->ip.proto == IPPROTO_SCTP) { 170a175a723SJoe Stringer key_expected |= 1 << OVS_KEY_ATTR_SCTP; 171a175a723SJoe Stringer if (match->mask && (match->mask->key.ip.proto == 0xff)) 172a175a723SJoe Stringer mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; 173a175a723SJoe Stringer } 174a175a723SJoe Stringer 17503f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_TCP) { 17603f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_TCP; 17703f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 17803f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_TCP; 17903f0d916SAndy Zhou } 18003f0d916SAndy Zhou 18103f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_ICMP) { 18203f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_ICMP; 18303f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 18403f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_ICMP; 18503f0d916SAndy Zhou } 18603f0d916SAndy Zhou } 18703f0d916SAndy Zhou } 18803f0d916SAndy Zhou 18903f0d916SAndy Zhou if (match->key->eth.type == htons(ETH_P_IPV6)) { 19003f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_IPV6; 19103f0d916SAndy Zhou if (match->mask && (match->mask->key.eth.type == htons(0xffff))) 19203f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_IPV6; 19303f0d916SAndy Zhou 19403f0d916SAndy Zhou if (match->key->ip.frag != OVS_FRAG_TYPE_LATER) { 19503f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_UDP) { 19603f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_UDP; 19703f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 19803f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_UDP; 19903f0d916SAndy Zhou } 20003f0d916SAndy Zhou 201a175a723SJoe Stringer if (match->key->ip.proto == IPPROTO_SCTP) { 202a175a723SJoe Stringer key_expected |= 1 << OVS_KEY_ATTR_SCTP; 203a175a723SJoe Stringer if (match->mask && (match->mask->key.ip.proto == 0xff)) 204a175a723SJoe Stringer mask_allowed |= 1 << OVS_KEY_ATTR_SCTP; 205a175a723SJoe Stringer } 206a175a723SJoe Stringer 20703f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_TCP) { 20803f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_TCP; 20903f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 21003f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_TCP; 21103f0d916SAndy Zhou } 21203f0d916SAndy Zhou 21303f0d916SAndy Zhou if (match->key->ip.proto == IPPROTO_ICMPV6) { 21403f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_ICMPV6; 21503f0d916SAndy Zhou if (match->mask && (match->mask->key.ip.proto == 0xff)) 21603f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_ICMPV6; 21703f0d916SAndy Zhou 21803f0d916SAndy Zhou if (match->key->ipv6.tp.src == 21903f0d916SAndy Zhou htons(NDISC_NEIGHBOUR_SOLICITATION) || 22003f0d916SAndy Zhou match->key->ipv6.tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)) { 22103f0d916SAndy Zhou key_expected |= 1 << OVS_KEY_ATTR_ND; 22203f0d916SAndy Zhou if (match->mask && (match->mask->key.ipv6.tp.src == htons(0xffff))) 22303f0d916SAndy Zhou mask_allowed |= 1 << OVS_KEY_ATTR_ND; 22403f0d916SAndy Zhou } 22503f0d916SAndy Zhou } 22603f0d916SAndy Zhou } 22703f0d916SAndy Zhou } 22803f0d916SAndy Zhou 22903f0d916SAndy Zhou if ((key_attrs & key_expected) != key_expected) { 23003f0d916SAndy Zhou /* Key attributes check failed. */ 23103f0d916SAndy Zhou OVS_NLERR("Missing expected key attributes (key_attrs=%llx, expected=%llx).\n", 23203f0d916SAndy Zhou key_attrs, key_expected); 23303f0d916SAndy Zhou return false; 23403f0d916SAndy Zhou } 23503f0d916SAndy Zhou 23603f0d916SAndy Zhou if ((mask_attrs & mask_allowed) != mask_attrs) { 23703f0d916SAndy Zhou /* Mask attributes check failed. */ 23803f0d916SAndy Zhou OVS_NLERR("Contain more than allowed mask fields (mask_attrs=%llx, mask_allowed=%llx).\n", 23903f0d916SAndy Zhou mask_attrs, mask_allowed); 24003f0d916SAndy Zhou return false; 24103f0d916SAndy Zhou } 24203f0d916SAndy Zhou 24303f0d916SAndy Zhou return true; 24403f0d916SAndy Zhou } 24503f0d916SAndy Zhou 246ccb1352eSJesse Gross static int check_header(struct sk_buff *skb, int len) 247ccb1352eSJesse Gross { 248ccb1352eSJesse Gross if (unlikely(skb->len < len)) 249ccb1352eSJesse Gross return -EINVAL; 250ccb1352eSJesse Gross if (unlikely(!pskb_may_pull(skb, len))) 251ccb1352eSJesse Gross return -ENOMEM; 252ccb1352eSJesse Gross return 0; 253ccb1352eSJesse Gross } 254ccb1352eSJesse Gross 255ccb1352eSJesse Gross static bool arphdr_ok(struct sk_buff *skb) 256ccb1352eSJesse Gross { 257ccb1352eSJesse Gross return pskb_may_pull(skb, skb_network_offset(skb) + 258ccb1352eSJesse Gross sizeof(struct arp_eth_header)); 259ccb1352eSJesse Gross } 260ccb1352eSJesse Gross 261ccb1352eSJesse Gross static int check_iphdr(struct sk_buff *skb) 262ccb1352eSJesse Gross { 263ccb1352eSJesse Gross unsigned int nh_ofs = skb_network_offset(skb); 264ccb1352eSJesse Gross unsigned int ip_len; 265ccb1352eSJesse Gross int err; 266ccb1352eSJesse Gross 267ccb1352eSJesse Gross err = check_header(skb, nh_ofs + sizeof(struct iphdr)); 268ccb1352eSJesse Gross if (unlikely(err)) 269ccb1352eSJesse Gross return err; 270ccb1352eSJesse Gross 271ccb1352eSJesse Gross ip_len = ip_hdrlen(skb); 272ccb1352eSJesse Gross if (unlikely(ip_len < sizeof(struct iphdr) || 273ccb1352eSJesse Gross skb->len < nh_ofs + ip_len)) 274ccb1352eSJesse Gross return -EINVAL; 275ccb1352eSJesse Gross 276ccb1352eSJesse Gross skb_set_transport_header(skb, nh_ofs + ip_len); 277ccb1352eSJesse Gross return 0; 278ccb1352eSJesse Gross } 279ccb1352eSJesse Gross 280ccb1352eSJesse Gross static bool tcphdr_ok(struct sk_buff *skb) 281ccb1352eSJesse Gross { 282ccb1352eSJesse Gross int th_ofs = skb_transport_offset(skb); 283ccb1352eSJesse Gross int tcp_len; 284ccb1352eSJesse Gross 285ccb1352eSJesse Gross if (unlikely(!pskb_may_pull(skb, th_ofs + sizeof(struct tcphdr)))) 286ccb1352eSJesse Gross return false; 287ccb1352eSJesse Gross 288ccb1352eSJesse Gross tcp_len = tcp_hdrlen(skb); 289ccb1352eSJesse Gross if (unlikely(tcp_len < sizeof(struct tcphdr) || 290ccb1352eSJesse Gross skb->len < th_ofs + tcp_len)) 291ccb1352eSJesse Gross return false; 292ccb1352eSJesse Gross 293ccb1352eSJesse Gross return true; 294ccb1352eSJesse Gross } 295ccb1352eSJesse Gross 296ccb1352eSJesse Gross static bool udphdr_ok(struct sk_buff *skb) 297ccb1352eSJesse Gross { 298ccb1352eSJesse Gross return pskb_may_pull(skb, skb_transport_offset(skb) + 299ccb1352eSJesse Gross sizeof(struct udphdr)); 300ccb1352eSJesse Gross } 301ccb1352eSJesse Gross 302a175a723SJoe Stringer static bool sctphdr_ok(struct sk_buff *skb) 303a175a723SJoe Stringer { 304a175a723SJoe Stringer return pskb_may_pull(skb, skb_transport_offset(skb) + 305a175a723SJoe Stringer sizeof(struct sctphdr)); 306a175a723SJoe Stringer } 307a175a723SJoe Stringer 308ccb1352eSJesse Gross static bool icmphdr_ok(struct sk_buff *skb) 309ccb1352eSJesse Gross { 310ccb1352eSJesse Gross return pskb_may_pull(skb, skb_transport_offset(skb) + 311ccb1352eSJesse Gross sizeof(struct icmphdr)); 312ccb1352eSJesse Gross } 313ccb1352eSJesse Gross 314ccb1352eSJesse Gross u64 ovs_flow_used_time(unsigned long flow_jiffies) 315ccb1352eSJesse Gross { 316ccb1352eSJesse Gross struct timespec cur_ts; 317ccb1352eSJesse Gross u64 cur_ms, idle_ms; 318ccb1352eSJesse Gross 319ccb1352eSJesse Gross ktime_get_ts(&cur_ts); 320ccb1352eSJesse Gross idle_ms = jiffies_to_msecs(jiffies - flow_jiffies); 321ccb1352eSJesse Gross cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC + 322ccb1352eSJesse Gross cur_ts.tv_nsec / NSEC_PER_MSEC; 323ccb1352eSJesse Gross 324ccb1352eSJesse Gross return cur_ms - idle_ms; 325ccb1352eSJesse Gross } 326ccb1352eSJesse Gross 32703f0d916SAndy Zhou static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) 328ccb1352eSJesse Gross { 329ccb1352eSJesse Gross unsigned int nh_ofs = skb_network_offset(skb); 330ccb1352eSJesse Gross unsigned int nh_len; 331ccb1352eSJesse Gross int payload_ofs; 332ccb1352eSJesse Gross struct ipv6hdr *nh; 333ccb1352eSJesse Gross uint8_t nexthdr; 334ccb1352eSJesse Gross __be16 frag_off; 335ccb1352eSJesse Gross int err; 336ccb1352eSJesse Gross 337ccb1352eSJesse Gross err = check_header(skb, nh_ofs + sizeof(*nh)); 338ccb1352eSJesse Gross if (unlikely(err)) 339ccb1352eSJesse Gross return err; 340ccb1352eSJesse Gross 341ccb1352eSJesse Gross nh = ipv6_hdr(skb); 342ccb1352eSJesse Gross nexthdr = nh->nexthdr; 343ccb1352eSJesse Gross payload_ofs = (u8 *)(nh + 1) - skb->data; 344ccb1352eSJesse Gross 345ccb1352eSJesse Gross key->ip.proto = NEXTHDR_NONE; 346ccb1352eSJesse Gross key->ip.tos = ipv6_get_dsfield(nh); 347ccb1352eSJesse Gross key->ip.ttl = nh->hop_limit; 348ccb1352eSJesse Gross key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL); 349ccb1352eSJesse Gross key->ipv6.addr.src = nh->saddr; 350ccb1352eSJesse Gross key->ipv6.addr.dst = nh->daddr; 351ccb1352eSJesse Gross 352ccb1352eSJesse Gross payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); 353ccb1352eSJesse Gross if (unlikely(payload_ofs < 0)) 354ccb1352eSJesse Gross return -EINVAL; 355ccb1352eSJesse Gross 356ccb1352eSJesse Gross if (frag_off) { 357ccb1352eSJesse Gross if (frag_off & htons(~0x7)) 358ccb1352eSJesse Gross key->ip.frag = OVS_FRAG_TYPE_LATER; 359ccb1352eSJesse Gross else 360ccb1352eSJesse Gross key->ip.frag = OVS_FRAG_TYPE_FIRST; 361ccb1352eSJesse Gross } 362ccb1352eSJesse Gross 363ccb1352eSJesse Gross nh_len = payload_ofs - nh_ofs; 364ccb1352eSJesse Gross skb_set_transport_header(skb, nh_ofs + nh_len); 365ccb1352eSJesse Gross key->ip.proto = nexthdr; 366ccb1352eSJesse Gross return nh_len; 367ccb1352eSJesse Gross } 368ccb1352eSJesse Gross 369ccb1352eSJesse Gross static bool icmp6hdr_ok(struct sk_buff *skb) 370ccb1352eSJesse Gross { 371ccb1352eSJesse Gross return pskb_may_pull(skb, skb_transport_offset(skb) + 372ccb1352eSJesse Gross sizeof(struct icmp6hdr)); 373ccb1352eSJesse Gross } 374ccb1352eSJesse Gross 37503f0d916SAndy Zhou void ovs_flow_key_mask(struct sw_flow_key *dst, const struct sw_flow_key *src, 37603f0d916SAndy Zhou const struct sw_flow_mask *mask) 37703f0d916SAndy Zhou { 378*5828cd9aSAndy Zhou const long *m = (long *)((u8 *)&mask->key + mask->range.start); 379*5828cd9aSAndy Zhou const long *s = (long *)((u8 *)src + mask->range.start); 380*5828cd9aSAndy Zhou long *d = (long *)((u8 *)dst + mask->range.start); 38103f0d916SAndy Zhou int i; 38203f0d916SAndy Zhou 383*5828cd9aSAndy Zhou /* The memory outside of the 'mask->range' are not set since 384*5828cd9aSAndy Zhou * further operations on 'dst' only uses contents within 385*5828cd9aSAndy Zhou * 'mask->range'. 386*5828cd9aSAndy Zhou */ 387*5828cd9aSAndy Zhou for (i = 0; i < range_n_bytes(&mask->range); i += sizeof(long)) 388*5828cd9aSAndy Zhou *d++ = *s++ & *m++; 38903f0d916SAndy Zhou } 39003f0d916SAndy Zhou 391ccb1352eSJesse Gross #define TCP_FLAGS_OFFSET 13 392ccb1352eSJesse Gross #define TCP_FLAG_MASK 0x3f 393ccb1352eSJesse Gross 394ccb1352eSJesse Gross void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb) 395ccb1352eSJesse Gross { 396ccb1352eSJesse Gross u8 tcp_flags = 0; 397ccb1352eSJesse Gross 398c55177e3SJesse Gross if ((flow->key.eth.type == htons(ETH_P_IP) || 399c55177e3SJesse Gross flow->key.eth.type == htons(ETH_P_IPV6)) && 400bf32fecdSJesse Gross flow->key.ip.proto == IPPROTO_TCP && 401bf32fecdSJesse Gross likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) { 402ccb1352eSJesse Gross u8 *tcp = (u8 *)tcp_hdr(skb); 403ccb1352eSJesse Gross tcp_flags = *(tcp + TCP_FLAGS_OFFSET) & TCP_FLAG_MASK; 404ccb1352eSJesse Gross } 405ccb1352eSJesse Gross 406ccb1352eSJesse Gross spin_lock(&flow->lock); 407ccb1352eSJesse Gross flow->used = jiffies; 408ccb1352eSJesse Gross flow->packet_count++; 409ccb1352eSJesse Gross flow->byte_count += skb->len; 410ccb1352eSJesse Gross flow->tcp_flags |= tcp_flags; 411ccb1352eSJesse Gross spin_unlock(&flow->lock); 412ccb1352eSJesse Gross } 413ccb1352eSJesse Gross 41474f84a57SPravin B Shelar struct sw_flow_actions *ovs_flow_actions_alloc(int size) 415ccb1352eSJesse Gross { 416ccb1352eSJesse Gross struct sw_flow_actions *sfa; 417ccb1352eSJesse Gross 41874f84a57SPravin B Shelar if (size > MAX_ACTIONS_BUFSIZE) 419ccb1352eSJesse Gross return ERR_PTR(-EINVAL); 420ccb1352eSJesse Gross 42174f84a57SPravin B Shelar sfa = kmalloc(sizeof(*sfa) + size, GFP_KERNEL); 422ccb1352eSJesse Gross if (!sfa) 423ccb1352eSJesse Gross return ERR_PTR(-ENOMEM); 424ccb1352eSJesse Gross 42574f84a57SPravin B Shelar sfa->actions_len = 0; 426ccb1352eSJesse Gross return sfa; 427ccb1352eSJesse Gross } 428ccb1352eSJesse Gross 429ccb1352eSJesse Gross struct sw_flow *ovs_flow_alloc(void) 430ccb1352eSJesse Gross { 431ccb1352eSJesse Gross struct sw_flow *flow; 432ccb1352eSJesse Gross 433ccb1352eSJesse Gross flow = kmem_cache_alloc(flow_cache, GFP_KERNEL); 434ccb1352eSJesse Gross if (!flow) 435ccb1352eSJesse Gross return ERR_PTR(-ENOMEM); 436ccb1352eSJesse Gross 437ccb1352eSJesse Gross spin_lock_init(&flow->lock); 438ccb1352eSJesse Gross flow->sf_acts = NULL; 43903f0d916SAndy Zhou flow->mask = NULL; 440ccb1352eSJesse Gross 441ccb1352eSJesse Gross return flow; 442ccb1352eSJesse Gross } 443ccb1352eSJesse Gross 444ccb1352eSJesse Gross static struct hlist_head *find_bucket(struct flow_table *table, u32 hash) 445ccb1352eSJesse Gross { 446ccb1352eSJesse Gross hash = jhash_1word(hash, table->hash_seed); 447ccb1352eSJesse Gross return flex_array_get(table->buckets, 448ccb1352eSJesse Gross (hash & (table->n_buckets - 1))); 449ccb1352eSJesse Gross } 450ccb1352eSJesse Gross 451ccb1352eSJesse Gross static struct flex_array *alloc_buckets(unsigned int n_buckets) 452ccb1352eSJesse Gross { 453ccb1352eSJesse Gross struct flex_array *buckets; 454ccb1352eSJesse Gross int i, err; 455ccb1352eSJesse Gross 45642415c90SPravin B Shelar buckets = flex_array_alloc(sizeof(struct hlist_head), 457ccb1352eSJesse Gross n_buckets, GFP_KERNEL); 458ccb1352eSJesse Gross if (!buckets) 459ccb1352eSJesse Gross return NULL; 460ccb1352eSJesse Gross 461ccb1352eSJesse Gross err = flex_array_prealloc(buckets, 0, n_buckets, GFP_KERNEL); 462ccb1352eSJesse Gross if (err) { 463ccb1352eSJesse Gross flex_array_free(buckets); 464ccb1352eSJesse Gross return NULL; 465ccb1352eSJesse Gross } 466ccb1352eSJesse Gross 467ccb1352eSJesse Gross for (i = 0; i < n_buckets; i++) 468ccb1352eSJesse Gross INIT_HLIST_HEAD((struct hlist_head *) 469ccb1352eSJesse Gross flex_array_get(buckets, i)); 470ccb1352eSJesse Gross 471ccb1352eSJesse Gross return buckets; 472ccb1352eSJesse Gross } 473ccb1352eSJesse Gross 474ccb1352eSJesse Gross static void free_buckets(struct flex_array *buckets) 475ccb1352eSJesse Gross { 476ccb1352eSJesse Gross flex_array_free(buckets); 477ccb1352eSJesse Gross } 478ccb1352eSJesse Gross 47903f0d916SAndy Zhou static struct flow_table *__flow_tbl_alloc(int new_size) 480ccb1352eSJesse Gross { 481ccb1352eSJesse Gross struct flow_table *table = kmalloc(sizeof(*table), GFP_KERNEL); 482ccb1352eSJesse Gross 483ccb1352eSJesse Gross if (!table) 484ccb1352eSJesse Gross return NULL; 485ccb1352eSJesse Gross 486ccb1352eSJesse Gross table->buckets = alloc_buckets(new_size); 487ccb1352eSJesse Gross 488ccb1352eSJesse Gross if (!table->buckets) { 489ccb1352eSJesse Gross kfree(table); 490ccb1352eSJesse Gross return NULL; 491ccb1352eSJesse Gross } 492ccb1352eSJesse Gross table->n_buckets = new_size; 493ccb1352eSJesse Gross table->count = 0; 494ccb1352eSJesse Gross table->node_ver = 0; 495ccb1352eSJesse Gross table->keep_flows = false; 496ccb1352eSJesse Gross get_random_bytes(&table->hash_seed, sizeof(u32)); 49703f0d916SAndy Zhou table->mask_list = NULL; 498ccb1352eSJesse Gross 499ccb1352eSJesse Gross return table; 500ccb1352eSJesse Gross } 501ccb1352eSJesse Gross 50203f0d916SAndy Zhou static void __flow_tbl_destroy(struct flow_table *table) 503ccb1352eSJesse Gross { 504ccb1352eSJesse Gross int i; 505ccb1352eSJesse Gross 506ccb1352eSJesse Gross if (table->keep_flows) 507ccb1352eSJesse Gross goto skip_flows; 508ccb1352eSJesse Gross 509ccb1352eSJesse Gross for (i = 0; i < table->n_buckets; i++) { 510ccb1352eSJesse Gross struct sw_flow *flow; 511ccb1352eSJesse Gross struct hlist_head *head = flex_array_get(table->buckets, i); 512b67bfe0dSSasha Levin struct hlist_node *n; 513ccb1352eSJesse Gross int ver = table->node_ver; 514ccb1352eSJesse Gross 515b67bfe0dSSasha Levin hlist_for_each_entry_safe(flow, n, head, hash_node[ver]) { 51676a66c7eSPravin B Shelar hlist_del(&flow->hash_node[ver]); 51703f0d916SAndy Zhou ovs_flow_free(flow, false); 518ccb1352eSJesse Gross } 519ccb1352eSJesse Gross } 520ccb1352eSJesse Gross 52103f0d916SAndy Zhou BUG_ON(!list_empty(table->mask_list)); 52203f0d916SAndy Zhou kfree(table->mask_list); 52303f0d916SAndy Zhou 524ccb1352eSJesse Gross skip_flows: 525ccb1352eSJesse Gross free_buckets(table->buckets); 526ccb1352eSJesse Gross kfree(table); 527ccb1352eSJesse Gross } 528ccb1352eSJesse Gross 52903f0d916SAndy Zhou struct flow_table *ovs_flow_tbl_alloc(int new_size) 53003f0d916SAndy Zhou { 53103f0d916SAndy Zhou struct flow_table *table = __flow_tbl_alloc(new_size); 53203f0d916SAndy Zhou 53303f0d916SAndy Zhou if (!table) 53403f0d916SAndy Zhou return NULL; 53503f0d916SAndy Zhou 53603f0d916SAndy Zhou table->mask_list = kmalloc(sizeof(struct list_head), GFP_KERNEL); 53703f0d916SAndy Zhou if (!table->mask_list) { 53803f0d916SAndy Zhou table->keep_flows = true; 53903f0d916SAndy Zhou __flow_tbl_destroy(table); 54003f0d916SAndy Zhou return NULL; 54103f0d916SAndy Zhou } 54203f0d916SAndy Zhou INIT_LIST_HEAD(table->mask_list); 54303f0d916SAndy Zhou 54403f0d916SAndy Zhou return table; 54503f0d916SAndy Zhou } 54603f0d916SAndy Zhou 547ccb1352eSJesse Gross static void flow_tbl_destroy_rcu_cb(struct rcu_head *rcu) 548ccb1352eSJesse Gross { 549ccb1352eSJesse Gross struct flow_table *table = container_of(rcu, struct flow_table, rcu); 550ccb1352eSJesse Gross 55103f0d916SAndy Zhou __flow_tbl_destroy(table); 552ccb1352eSJesse Gross } 553ccb1352eSJesse Gross 55403f0d916SAndy Zhou void ovs_flow_tbl_destroy(struct flow_table *table, bool deferred) 555ccb1352eSJesse Gross { 556ccb1352eSJesse Gross if (!table) 557ccb1352eSJesse Gross return; 558ccb1352eSJesse Gross 55903f0d916SAndy Zhou if (deferred) 560ccb1352eSJesse Gross call_rcu(&table->rcu, flow_tbl_destroy_rcu_cb); 56103f0d916SAndy Zhou else 56203f0d916SAndy Zhou __flow_tbl_destroy(table); 563ccb1352eSJesse Gross } 564ccb1352eSJesse Gross 56503f0d916SAndy Zhou struct sw_flow *ovs_flow_dump_next(struct flow_table *table, u32 *bucket, u32 *last) 566ccb1352eSJesse Gross { 567ccb1352eSJesse Gross struct sw_flow *flow; 568ccb1352eSJesse Gross struct hlist_head *head; 569ccb1352eSJesse Gross int ver; 570ccb1352eSJesse Gross int i; 571ccb1352eSJesse Gross 572ccb1352eSJesse Gross ver = table->node_ver; 573ccb1352eSJesse Gross while (*bucket < table->n_buckets) { 574ccb1352eSJesse Gross i = 0; 575ccb1352eSJesse Gross head = flex_array_get(table->buckets, *bucket); 576b67bfe0dSSasha Levin hlist_for_each_entry_rcu(flow, head, hash_node[ver]) { 577ccb1352eSJesse Gross if (i < *last) { 578ccb1352eSJesse Gross i++; 579ccb1352eSJesse Gross continue; 580ccb1352eSJesse Gross } 581ccb1352eSJesse Gross *last = i + 1; 582ccb1352eSJesse Gross return flow; 583ccb1352eSJesse Gross } 584ccb1352eSJesse Gross (*bucket)++; 585ccb1352eSJesse Gross *last = 0; 586ccb1352eSJesse Gross } 587ccb1352eSJesse Gross 588ccb1352eSJesse Gross return NULL; 589ccb1352eSJesse Gross } 590ccb1352eSJesse Gross 59103f0d916SAndy Zhou static void __tbl_insert(struct flow_table *table, struct sw_flow *flow) 592a3e82996SPravin B Shelar { 593a3e82996SPravin B Shelar struct hlist_head *head; 59403f0d916SAndy Zhou 595a3e82996SPravin B Shelar head = find_bucket(table, flow->hash); 596a3e82996SPravin B Shelar hlist_add_head_rcu(&flow->hash_node[table->node_ver], head); 59703f0d916SAndy Zhou 598a3e82996SPravin B Shelar table->count++; 599a3e82996SPravin B Shelar } 600a3e82996SPravin B Shelar 601ccb1352eSJesse Gross static void flow_table_copy_flows(struct flow_table *old, struct flow_table *new) 602ccb1352eSJesse Gross { 603ccb1352eSJesse Gross int old_ver; 604ccb1352eSJesse Gross int i; 605ccb1352eSJesse Gross 606ccb1352eSJesse Gross old_ver = old->node_ver; 607ccb1352eSJesse Gross new->node_ver = !old_ver; 608ccb1352eSJesse Gross 609ccb1352eSJesse Gross /* Insert in new table. */ 610ccb1352eSJesse Gross for (i = 0; i < old->n_buckets; i++) { 611ccb1352eSJesse Gross struct sw_flow *flow; 612ccb1352eSJesse Gross struct hlist_head *head; 613ccb1352eSJesse Gross 614ccb1352eSJesse Gross head = flex_array_get(old->buckets, i); 615ccb1352eSJesse Gross 616b67bfe0dSSasha Levin hlist_for_each_entry(flow, head, hash_node[old_ver]) 61703f0d916SAndy Zhou __tbl_insert(new, flow); 618ccb1352eSJesse Gross } 61903f0d916SAndy Zhou 62003f0d916SAndy Zhou new->mask_list = old->mask_list; 621ccb1352eSJesse Gross old->keep_flows = true; 622ccb1352eSJesse Gross } 623ccb1352eSJesse Gross 624ccb1352eSJesse Gross static struct flow_table *__flow_tbl_rehash(struct flow_table *table, int n_buckets) 625ccb1352eSJesse Gross { 626ccb1352eSJesse Gross struct flow_table *new_table; 627ccb1352eSJesse Gross 62803f0d916SAndy Zhou new_table = __flow_tbl_alloc(n_buckets); 629ccb1352eSJesse Gross if (!new_table) 630ccb1352eSJesse Gross return ERR_PTR(-ENOMEM); 631ccb1352eSJesse Gross 632ccb1352eSJesse Gross flow_table_copy_flows(table, new_table); 633ccb1352eSJesse Gross 634ccb1352eSJesse Gross return new_table; 635ccb1352eSJesse Gross } 636ccb1352eSJesse Gross 637ccb1352eSJesse Gross struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table) 638ccb1352eSJesse Gross { 639ccb1352eSJesse Gross return __flow_tbl_rehash(table, table->n_buckets); 640ccb1352eSJesse Gross } 641ccb1352eSJesse Gross 642ccb1352eSJesse Gross struct flow_table *ovs_flow_tbl_expand(struct flow_table *table) 643ccb1352eSJesse Gross { 644ccb1352eSJesse Gross return __flow_tbl_rehash(table, table->n_buckets * 2); 645ccb1352eSJesse Gross } 646ccb1352eSJesse Gross 64703f0d916SAndy Zhou static void __flow_free(struct sw_flow *flow) 648ccb1352eSJesse Gross { 649ccb1352eSJesse Gross kfree((struct sf_flow_acts __force *)flow->sf_acts); 650ccb1352eSJesse Gross kmem_cache_free(flow_cache, flow); 651ccb1352eSJesse Gross } 652ccb1352eSJesse Gross 653ccb1352eSJesse Gross static void rcu_free_flow_callback(struct rcu_head *rcu) 654ccb1352eSJesse Gross { 655ccb1352eSJesse Gross struct sw_flow *flow = container_of(rcu, struct sw_flow, rcu); 656ccb1352eSJesse Gross 65703f0d916SAndy Zhou __flow_free(flow); 658ccb1352eSJesse Gross } 659ccb1352eSJesse Gross 66003f0d916SAndy Zhou void ovs_flow_free(struct sw_flow *flow, bool deferred) 661ccb1352eSJesse Gross { 66203f0d916SAndy Zhou if (!flow) 66303f0d916SAndy Zhou return; 66403f0d916SAndy Zhou 66503f0d916SAndy Zhou ovs_sw_flow_mask_del_ref(flow->mask, deferred); 66603f0d916SAndy Zhou 66703f0d916SAndy Zhou if (deferred) 668ccb1352eSJesse Gross call_rcu(&flow->rcu, rcu_free_flow_callback); 66903f0d916SAndy Zhou else 67003f0d916SAndy Zhou __flow_free(flow); 671ccb1352eSJesse Gross } 672ccb1352eSJesse Gross 673ccb1352eSJesse Gross /* Schedules 'sf_acts' to be freed after the next RCU grace period. 674ccb1352eSJesse Gross * The caller must hold rcu_read_lock for this to be sensible. */ 675ccb1352eSJesse Gross void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts) 676ccb1352eSJesse Gross { 67780f0fd8aSWei Yongjun kfree_rcu(sf_acts, rcu); 678ccb1352eSJesse Gross } 679ccb1352eSJesse Gross 680ccb1352eSJesse Gross static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key) 681ccb1352eSJesse Gross { 682ccb1352eSJesse Gross struct qtag_prefix { 683ccb1352eSJesse Gross __be16 eth_type; /* ETH_P_8021Q */ 684ccb1352eSJesse Gross __be16 tci; 685ccb1352eSJesse Gross }; 686ccb1352eSJesse Gross struct qtag_prefix *qp; 687ccb1352eSJesse Gross 688ccb1352eSJesse Gross if (unlikely(skb->len < sizeof(struct qtag_prefix) + sizeof(__be16))) 689ccb1352eSJesse Gross return 0; 690ccb1352eSJesse Gross 691ccb1352eSJesse Gross if (unlikely(!pskb_may_pull(skb, sizeof(struct qtag_prefix) + 692ccb1352eSJesse Gross sizeof(__be16)))) 693ccb1352eSJesse Gross return -ENOMEM; 694ccb1352eSJesse Gross 695ccb1352eSJesse Gross qp = (struct qtag_prefix *) skb->data; 696ccb1352eSJesse Gross key->eth.tci = qp->tci | htons(VLAN_TAG_PRESENT); 697ccb1352eSJesse Gross __skb_pull(skb, sizeof(struct qtag_prefix)); 698ccb1352eSJesse Gross 699ccb1352eSJesse Gross return 0; 700ccb1352eSJesse Gross } 701ccb1352eSJesse Gross 702ccb1352eSJesse Gross static __be16 parse_ethertype(struct sk_buff *skb) 703ccb1352eSJesse Gross { 704ccb1352eSJesse Gross struct llc_snap_hdr { 705ccb1352eSJesse Gross u8 dsap; /* Always 0xAA */ 706ccb1352eSJesse Gross u8 ssap; /* Always 0xAA */ 707ccb1352eSJesse Gross u8 ctrl; 708ccb1352eSJesse Gross u8 oui[3]; 709ccb1352eSJesse Gross __be16 ethertype; 710ccb1352eSJesse Gross }; 711ccb1352eSJesse Gross struct llc_snap_hdr *llc; 712ccb1352eSJesse Gross __be16 proto; 713ccb1352eSJesse Gross 714ccb1352eSJesse Gross proto = *(__be16 *) skb->data; 715ccb1352eSJesse Gross __skb_pull(skb, sizeof(__be16)); 716ccb1352eSJesse Gross 717e5c5d22eSSimon Horman if (ntohs(proto) >= ETH_P_802_3_MIN) 718ccb1352eSJesse Gross return proto; 719ccb1352eSJesse Gross 720ccb1352eSJesse Gross if (skb->len < sizeof(struct llc_snap_hdr)) 721ccb1352eSJesse Gross return htons(ETH_P_802_2); 722ccb1352eSJesse Gross 723ccb1352eSJesse Gross if (unlikely(!pskb_may_pull(skb, sizeof(struct llc_snap_hdr)))) 724ccb1352eSJesse Gross return htons(0); 725ccb1352eSJesse Gross 726ccb1352eSJesse Gross llc = (struct llc_snap_hdr *) skb->data; 727ccb1352eSJesse Gross if (llc->dsap != LLC_SAP_SNAP || 728ccb1352eSJesse Gross llc->ssap != LLC_SAP_SNAP || 729ccb1352eSJesse Gross (llc->oui[0] | llc->oui[1] | llc->oui[2]) != 0) 730ccb1352eSJesse Gross return htons(ETH_P_802_2); 731ccb1352eSJesse Gross 732ccb1352eSJesse Gross __skb_pull(skb, sizeof(struct llc_snap_hdr)); 73317b682a0SRich Lane 734e5c5d22eSSimon Horman if (ntohs(llc->ethertype) >= ETH_P_802_3_MIN) 735ccb1352eSJesse Gross return llc->ethertype; 73617b682a0SRich Lane 73717b682a0SRich Lane return htons(ETH_P_802_2); 738ccb1352eSJesse Gross } 739ccb1352eSJesse Gross 740ccb1352eSJesse Gross static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key, 74103f0d916SAndy Zhou int nh_len) 742ccb1352eSJesse Gross { 743ccb1352eSJesse Gross struct icmp6hdr *icmp = icmp6_hdr(skb); 744ccb1352eSJesse Gross 745ccb1352eSJesse Gross /* The ICMPv6 type and code fields use the 16-bit transport port 746ccb1352eSJesse Gross * fields, so we need to store them in 16-bit network byte order. 747ccb1352eSJesse Gross */ 748ccb1352eSJesse Gross key->ipv6.tp.src = htons(icmp->icmp6_type); 749ccb1352eSJesse Gross key->ipv6.tp.dst = htons(icmp->icmp6_code); 750ccb1352eSJesse Gross 751ccb1352eSJesse Gross if (icmp->icmp6_code == 0 && 752ccb1352eSJesse Gross (icmp->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION || 753ccb1352eSJesse Gross icmp->icmp6_type == NDISC_NEIGHBOUR_ADVERTISEMENT)) { 754ccb1352eSJesse Gross int icmp_len = skb->len - skb_transport_offset(skb); 755ccb1352eSJesse Gross struct nd_msg *nd; 756ccb1352eSJesse Gross int offset; 757ccb1352eSJesse Gross 758ccb1352eSJesse Gross /* In order to process neighbor discovery options, we need the 759ccb1352eSJesse Gross * entire packet. 760ccb1352eSJesse Gross */ 761ccb1352eSJesse Gross if (unlikely(icmp_len < sizeof(*nd))) 76203f0d916SAndy Zhou return 0; 76303f0d916SAndy Zhou 76403f0d916SAndy Zhou if (unlikely(skb_linearize(skb))) 76503f0d916SAndy Zhou return -ENOMEM; 766ccb1352eSJesse Gross 767ccb1352eSJesse Gross nd = (struct nd_msg *)skb_transport_header(skb); 768ccb1352eSJesse Gross key->ipv6.nd.target = nd->target; 769ccb1352eSJesse Gross 770ccb1352eSJesse Gross icmp_len -= sizeof(*nd); 771ccb1352eSJesse Gross offset = 0; 772ccb1352eSJesse Gross while (icmp_len >= 8) { 773ccb1352eSJesse Gross struct nd_opt_hdr *nd_opt = 774ccb1352eSJesse Gross (struct nd_opt_hdr *)(nd->opt + offset); 775ccb1352eSJesse Gross int opt_len = nd_opt->nd_opt_len * 8; 776ccb1352eSJesse Gross 777ccb1352eSJesse Gross if (unlikely(!opt_len || opt_len > icmp_len)) 77803f0d916SAndy Zhou return 0; 779ccb1352eSJesse Gross 780ccb1352eSJesse Gross /* Store the link layer address if the appropriate 781ccb1352eSJesse Gross * option is provided. It is considered an error if 782ccb1352eSJesse Gross * the same link layer option is specified twice. 783ccb1352eSJesse Gross */ 784ccb1352eSJesse Gross if (nd_opt->nd_opt_type == ND_OPT_SOURCE_LL_ADDR 785ccb1352eSJesse Gross && opt_len == 8) { 786ccb1352eSJesse Gross if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll))) 787ccb1352eSJesse Gross goto invalid; 788ccb1352eSJesse Gross memcpy(key->ipv6.nd.sll, 789ccb1352eSJesse Gross &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); 790ccb1352eSJesse Gross } else if (nd_opt->nd_opt_type == ND_OPT_TARGET_LL_ADDR 791ccb1352eSJesse Gross && opt_len == 8) { 792ccb1352eSJesse Gross if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll))) 793ccb1352eSJesse Gross goto invalid; 794ccb1352eSJesse Gross memcpy(key->ipv6.nd.tll, 795ccb1352eSJesse Gross &nd->opt[offset+sizeof(*nd_opt)], ETH_ALEN); 796ccb1352eSJesse Gross } 797ccb1352eSJesse Gross 798ccb1352eSJesse Gross icmp_len -= opt_len; 799ccb1352eSJesse Gross offset += opt_len; 800ccb1352eSJesse Gross } 801ccb1352eSJesse Gross } 802ccb1352eSJesse Gross 80303f0d916SAndy Zhou return 0; 804ccb1352eSJesse Gross 805ccb1352eSJesse Gross invalid: 806ccb1352eSJesse Gross memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target)); 807ccb1352eSJesse Gross memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll)); 808ccb1352eSJesse Gross memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll)); 809ccb1352eSJesse Gross 81003f0d916SAndy Zhou return 0; 811ccb1352eSJesse Gross } 812ccb1352eSJesse Gross 813ccb1352eSJesse Gross /** 814ccb1352eSJesse Gross * ovs_flow_extract - extracts a flow key from an Ethernet frame. 815ccb1352eSJesse Gross * @skb: sk_buff that contains the frame, with skb->data pointing to the 816ccb1352eSJesse Gross * Ethernet header 817ccb1352eSJesse Gross * @in_port: port number on which @skb was received. 818ccb1352eSJesse Gross * @key: output flow key 819ccb1352eSJesse Gross * 820ccb1352eSJesse Gross * The caller must ensure that skb->len >= ETH_HLEN. 821ccb1352eSJesse Gross * 822ccb1352eSJesse Gross * Returns 0 if successful, otherwise a negative errno value. 823ccb1352eSJesse Gross * 824ccb1352eSJesse Gross * Initializes @skb header pointers as follows: 825ccb1352eSJesse Gross * 826ccb1352eSJesse Gross * - skb->mac_header: the Ethernet header. 827ccb1352eSJesse Gross * 828ccb1352eSJesse Gross * - skb->network_header: just past the Ethernet header, or just past the 829ccb1352eSJesse Gross * VLAN header, to the first byte of the Ethernet payload. 830ccb1352eSJesse Gross * 83134d94f21SLorand Jakab * - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6 832ccb1352eSJesse Gross * on output, then just past the IP header, if one is present and 833ccb1352eSJesse Gross * of a correct length, otherwise the same as skb->network_header. 83434d94f21SLorand Jakab * For other key->eth.type values it is left untouched. 835ccb1352eSJesse Gross */ 83603f0d916SAndy Zhou int ovs_flow_extract(struct sk_buff *skb, u16 in_port, struct sw_flow_key *key) 837ccb1352eSJesse Gross { 83803f0d916SAndy Zhou int error; 839ccb1352eSJesse Gross struct ethhdr *eth; 840ccb1352eSJesse Gross 841ccb1352eSJesse Gross memset(key, 0, sizeof(*key)); 842ccb1352eSJesse Gross 843ccb1352eSJesse Gross key->phy.priority = skb->priority; 8447d5437c7SPravin B Shelar if (OVS_CB(skb)->tun_key) 8457d5437c7SPravin B Shelar memcpy(&key->tun_key, OVS_CB(skb)->tun_key, sizeof(key->tun_key)); 846ccb1352eSJesse Gross key->phy.in_port = in_port; 84739c7caebSAnsis Atteka key->phy.skb_mark = skb->mark; 848ccb1352eSJesse Gross 849ccb1352eSJesse Gross skb_reset_mac_header(skb); 850ccb1352eSJesse Gross 851ccb1352eSJesse Gross /* Link layer. We are guaranteed to have at least the 14 byte Ethernet 852ccb1352eSJesse Gross * header in the linear data area. 853ccb1352eSJesse Gross */ 854ccb1352eSJesse Gross eth = eth_hdr(skb); 855ccb1352eSJesse Gross memcpy(key->eth.src, eth->h_source, ETH_ALEN); 856ccb1352eSJesse Gross memcpy(key->eth.dst, eth->h_dest, ETH_ALEN); 857ccb1352eSJesse Gross 858ccb1352eSJesse Gross __skb_pull(skb, 2 * ETH_ALEN); 859b34df5e8SPravin B Shelar /* We are going to push all headers that we pull, so no need to 860b34df5e8SPravin B Shelar * update skb->csum here. 861b34df5e8SPravin B Shelar */ 862ccb1352eSJesse Gross 863ccb1352eSJesse Gross if (vlan_tx_tag_present(skb)) 864ccb1352eSJesse Gross key->eth.tci = htons(skb->vlan_tci); 865ccb1352eSJesse Gross else if (eth->h_proto == htons(ETH_P_8021Q)) 866ccb1352eSJesse Gross if (unlikely(parse_vlan(skb, key))) 867ccb1352eSJesse Gross return -ENOMEM; 868ccb1352eSJesse Gross 869ccb1352eSJesse Gross key->eth.type = parse_ethertype(skb); 870ccb1352eSJesse Gross if (unlikely(key->eth.type == htons(0))) 871ccb1352eSJesse Gross return -ENOMEM; 872ccb1352eSJesse Gross 873ccb1352eSJesse Gross skb_reset_network_header(skb); 874ccb1352eSJesse Gross __skb_push(skb, skb->data - skb_mac_header(skb)); 875ccb1352eSJesse Gross 876ccb1352eSJesse Gross /* Network layer. */ 877ccb1352eSJesse Gross if (key->eth.type == htons(ETH_P_IP)) { 878ccb1352eSJesse Gross struct iphdr *nh; 879ccb1352eSJesse Gross __be16 offset; 880ccb1352eSJesse Gross 881ccb1352eSJesse Gross error = check_iphdr(skb); 882ccb1352eSJesse Gross if (unlikely(error)) { 883ccb1352eSJesse Gross if (error == -EINVAL) { 884ccb1352eSJesse Gross skb->transport_header = skb->network_header; 885ccb1352eSJesse Gross error = 0; 886ccb1352eSJesse Gross } 88703f0d916SAndy Zhou return error; 888ccb1352eSJesse Gross } 889ccb1352eSJesse Gross 890ccb1352eSJesse Gross nh = ip_hdr(skb); 891ccb1352eSJesse Gross key->ipv4.addr.src = nh->saddr; 892ccb1352eSJesse Gross key->ipv4.addr.dst = nh->daddr; 893ccb1352eSJesse Gross 894ccb1352eSJesse Gross key->ip.proto = nh->protocol; 895ccb1352eSJesse Gross key->ip.tos = nh->tos; 896ccb1352eSJesse Gross key->ip.ttl = nh->ttl; 897ccb1352eSJesse Gross 898ccb1352eSJesse Gross offset = nh->frag_off & htons(IP_OFFSET); 899ccb1352eSJesse Gross if (offset) { 900ccb1352eSJesse Gross key->ip.frag = OVS_FRAG_TYPE_LATER; 90103f0d916SAndy Zhou return 0; 902ccb1352eSJesse Gross } 903ccb1352eSJesse Gross if (nh->frag_off & htons(IP_MF) || 904ccb1352eSJesse Gross skb_shinfo(skb)->gso_type & SKB_GSO_UDP) 905ccb1352eSJesse Gross key->ip.frag = OVS_FRAG_TYPE_FIRST; 906ccb1352eSJesse Gross 907ccb1352eSJesse Gross /* Transport layer. */ 908ccb1352eSJesse Gross if (key->ip.proto == IPPROTO_TCP) { 909ccb1352eSJesse Gross if (tcphdr_ok(skb)) { 910ccb1352eSJesse Gross struct tcphdr *tcp = tcp_hdr(skb); 911ccb1352eSJesse Gross key->ipv4.tp.src = tcp->source; 912ccb1352eSJesse Gross key->ipv4.tp.dst = tcp->dest; 913ccb1352eSJesse Gross } 914ccb1352eSJesse Gross } else if (key->ip.proto == IPPROTO_UDP) { 915ccb1352eSJesse Gross if (udphdr_ok(skb)) { 916ccb1352eSJesse Gross struct udphdr *udp = udp_hdr(skb); 917ccb1352eSJesse Gross key->ipv4.tp.src = udp->source; 918ccb1352eSJesse Gross key->ipv4.tp.dst = udp->dest; 919ccb1352eSJesse Gross } 920a175a723SJoe Stringer } else if (key->ip.proto == IPPROTO_SCTP) { 921a175a723SJoe Stringer if (sctphdr_ok(skb)) { 922a175a723SJoe Stringer struct sctphdr *sctp = sctp_hdr(skb); 923a175a723SJoe Stringer key->ipv4.tp.src = sctp->source; 924a175a723SJoe Stringer key->ipv4.tp.dst = sctp->dest; 925a175a723SJoe Stringer } 926ccb1352eSJesse Gross } else if (key->ip.proto == IPPROTO_ICMP) { 927ccb1352eSJesse Gross if (icmphdr_ok(skb)) { 928ccb1352eSJesse Gross struct icmphdr *icmp = icmp_hdr(skb); 929ccb1352eSJesse Gross /* The ICMP type and code fields use the 16-bit 930ccb1352eSJesse Gross * transport port fields, so we need to store 931ccb1352eSJesse Gross * them in 16-bit network byte order. */ 932ccb1352eSJesse Gross key->ipv4.tp.src = htons(icmp->type); 933ccb1352eSJesse Gross key->ipv4.tp.dst = htons(icmp->code); 934ccb1352eSJesse Gross } 935ccb1352eSJesse Gross } 936ccb1352eSJesse Gross 937c0618533SMehak Mahajan } else if ((key->eth.type == htons(ETH_P_ARP) || 938c0618533SMehak Mahajan key->eth.type == htons(ETH_P_RARP)) && arphdr_ok(skb)) { 939ccb1352eSJesse Gross struct arp_eth_header *arp; 940ccb1352eSJesse Gross 941ccb1352eSJesse Gross arp = (struct arp_eth_header *)skb_network_header(skb); 942ccb1352eSJesse Gross 943ccb1352eSJesse Gross if (arp->ar_hrd == htons(ARPHRD_ETHER) 944ccb1352eSJesse Gross && arp->ar_pro == htons(ETH_P_IP) 945ccb1352eSJesse Gross && arp->ar_hln == ETH_ALEN 946ccb1352eSJesse Gross && arp->ar_pln == 4) { 947ccb1352eSJesse Gross 948ccb1352eSJesse Gross /* We only match on the lower 8 bits of the opcode. */ 949ccb1352eSJesse Gross if (ntohs(arp->ar_op) <= 0xff) 950ccb1352eSJesse Gross key->ip.proto = ntohs(arp->ar_op); 951ccb1352eSJesse Gross memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src)); 952ccb1352eSJesse Gross memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst)); 953ccb1352eSJesse Gross memcpy(key->ipv4.arp.sha, arp->ar_sha, ETH_ALEN); 954ccb1352eSJesse Gross memcpy(key->ipv4.arp.tha, arp->ar_tha, ETH_ALEN); 955ccb1352eSJesse Gross } 956ccb1352eSJesse Gross } else if (key->eth.type == htons(ETH_P_IPV6)) { 957ccb1352eSJesse Gross int nh_len; /* IPv6 Header + Extensions */ 958ccb1352eSJesse Gross 95903f0d916SAndy Zhou nh_len = parse_ipv6hdr(skb, key); 960ccb1352eSJesse Gross if (unlikely(nh_len < 0)) { 96103f0d916SAndy Zhou if (nh_len == -EINVAL) { 962ccb1352eSJesse Gross skb->transport_header = skb->network_header; 96303f0d916SAndy Zhou error = 0; 96403f0d916SAndy Zhou } else { 965ccb1352eSJesse Gross error = nh_len; 96603f0d916SAndy Zhou } 96703f0d916SAndy Zhou return error; 968ccb1352eSJesse Gross } 969ccb1352eSJesse Gross 970ccb1352eSJesse Gross if (key->ip.frag == OVS_FRAG_TYPE_LATER) 97103f0d916SAndy Zhou return 0; 972ccb1352eSJesse Gross if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) 973ccb1352eSJesse Gross key->ip.frag = OVS_FRAG_TYPE_FIRST; 974ccb1352eSJesse Gross 975ccb1352eSJesse Gross /* Transport layer. */ 976ccb1352eSJesse Gross if (key->ip.proto == NEXTHDR_TCP) { 977ccb1352eSJesse Gross if (tcphdr_ok(skb)) { 978ccb1352eSJesse Gross struct tcphdr *tcp = tcp_hdr(skb); 979ccb1352eSJesse Gross key->ipv6.tp.src = tcp->source; 980ccb1352eSJesse Gross key->ipv6.tp.dst = tcp->dest; 981ccb1352eSJesse Gross } 982ccb1352eSJesse Gross } else if (key->ip.proto == NEXTHDR_UDP) { 983ccb1352eSJesse Gross if (udphdr_ok(skb)) { 984ccb1352eSJesse Gross struct udphdr *udp = udp_hdr(skb); 985ccb1352eSJesse Gross key->ipv6.tp.src = udp->source; 986ccb1352eSJesse Gross key->ipv6.tp.dst = udp->dest; 987ccb1352eSJesse Gross } 988a175a723SJoe Stringer } else if (key->ip.proto == NEXTHDR_SCTP) { 989a175a723SJoe Stringer if (sctphdr_ok(skb)) { 990a175a723SJoe Stringer struct sctphdr *sctp = sctp_hdr(skb); 991a175a723SJoe Stringer key->ipv6.tp.src = sctp->source; 992a175a723SJoe Stringer key->ipv6.tp.dst = sctp->dest; 993a175a723SJoe Stringer } 994ccb1352eSJesse Gross } else if (key->ip.proto == NEXTHDR_ICMP) { 995ccb1352eSJesse Gross if (icmp6hdr_ok(skb)) { 99603f0d916SAndy Zhou error = parse_icmpv6(skb, key, nh_len); 99703f0d916SAndy Zhou if (error) 99803f0d916SAndy Zhou return error; 999ccb1352eSJesse Gross } 1000ccb1352eSJesse Gross } 1001ccb1352eSJesse Gross } 1002ccb1352eSJesse Gross 100303f0d916SAndy Zhou return 0; 1004ccb1352eSJesse Gross } 1005ccb1352eSJesse Gross 100602237373SAndy Zhou static u32 ovs_flow_hash(const struct sw_flow_key *key, int key_start, 100702237373SAndy Zhou int key_end) 1008ccb1352eSJesse Gross { 1009*5828cd9aSAndy Zhou u32 *hash_key = (u32 *)((u8 *)key + key_start); 1010*5828cd9aSAndy Zhou int hash_u32s = (key_end - key_start) >> 2; 1011*5828cd9aSAndy Zhou 1012*5828cd9aSAndy Zhou /* Make sure number of hash bytes are multiple of u32. */ 1013*5828cd9aSAndy Zhou BUILD_BUG_ON(sizeof(long) % sizeof(u32)); 1014*5828cd9aSAndy Zhou 1015*5828cd9aSAndy Zhou return jhash2(hash_key, hash_u32s, 0); 1016a3e82996SPravin B Shelar } 1017a3e82996SPravin B Shelar 101803f0d916SAndy Zhou static int flow_key_start(const struct sw_flow_key *key) 1019a3e82996SPravin B Shelar { 1020a3e82996SPravin B Shelar if (key->tun_key.ipv4_dst) 1021a3e82996SPravin B Shelar return 0; 1022a3e82996SPravin B Shelar else 1023*5828cd9aSAndy Zhou return rounddown(offsetof(struct sw_flow_key, phy), 1024*5828cd9aSAndy Zhou sizeof(long)); 1025ccb1352eSJesse Gross } 1026ccb1352eSJesse Gross 102703f0d916SAndy Zhou static bool __cmp_key(const struct sw_flow_key *key1, 102802237373SAndy Zhou const struct sw_flow_key *key2, int key_start, int key_end) 102903f0d916SAndy Zhou { 1030*5828cd9aSAndy Zhou const long *cp1 = (long *)((u8 *)key1 + key_start); 1031*5828cd9aSAndy Zhou const long *cp2 = (long *)((u8 *)key2 + key_start); 1032*5828cd9aSAndy Zhou long diffs = 0; 1033*5828cd9aSAndy Zhou int i; 1034*5828cd9aSAndy Zhou 1035*5828cd9aSAndy Zhou for (i = key_start; i < key_end; i += sizeof(long)) 1036*5828cd9aSAndy Zhou diffs |= *cp1++ ^ *cp2++; 1037*5828cd9aSAndy Zhou 1038*5828cd9aSAndy Zhou return diffs == 0; 103903f0d916SAndy Zhou } 104003f0d916SAndy Zhou 1041*5828cd9aSAndy Zhou static bool __flow_cmp_masked_key(const struct sw_flow *flow, 104202237373SAndy Zhou const struct sw_flow_key *key, int key_start, int key_end) 104303f0d916SAndy Zhou { 104402237373SAndy Zhou return __cmp_key(&flow->key, key, key_start, key_end); 104503f0d916SAndy Zhou } 104603f0d916SAndy Zhou 104703f0d916SAndy Zhou static bool __flow_cmp_unmasked_key(const struct sw_flow *flow, 104802237373SAndy Zhou const struct sw_flow_key *key, int key_start, int key_end) 104903f0d916SAndy Zhou { 105002237373SAndy Zhou return __cmp_key(&flow->unmasked_key, key, key_start, key_end); 105103f0d916SAndy Zhou } 105203f0d916SAndy Zhou 105303f0d916SAndy Zhou bool ovs_flow_cmp_unmasked_key(const struct sw_flow *flow, 105402237373SAndy Zhou const struct sw_flow_key *key, int key_end) 105503f0d916SAndy Zhou { 105603f0d916SAndy Zhou int key_start; 105703f0d916SAndy Zhou key_start = flow_key_start(key); 105803f0d916SAndy Zhou 105902237373SAndy Zhou return __flow_cmp_unmasked_key(flow, key, key_start, key_end); 106003f0d916SAndy Zhou 106103f0d916SAndy Zhou } 106203f0d916SAndy Zhou 106303f0d916SAndy Zhou struct sw_flow *ovs_flow_lookup_unmasked_key(struct flow_table *table, 106403f0d916SAndy Zhou struct sw_flow_match *match) 106503f0d916SAndy Zhou { 106603f0d916SAndy Zhou struct sw_flow_key *unmasked = match->key; 106702237373SAndy Zhou int key_end = match->range.end; 106803f0d916SAndy Zhou struct sw_flow *flow; 106903f0d916SAndy Zhou 107003f0d916SAndy Zhou flow = ovs_flow_lookup(table, unmasked); 107102237373SAndy Zhou if (flow && (!ovs_flow_cmp_unmasked_key(flow, unmasked, key_end))) 107203f0d916SAndy Zhou flow = NULL; 107303f0d916SAndy Zhou 107403f0d916SAndy Zhou return flow; 107503f0d916SAndy Zhou } 107603f0d916SAndy Zhou 107703f0d916SAndy Zhou static struct sw_flow *ovs_masked_flow_lookup(struct flow_table *table, 1078*5828cd9aSAndy Zhou const struct sw_flow_key *unmasked, 107903f0d916SAndy Zhou struct sw_flow_mask *mask) 1080ccb1352eSJesse Gross { 1081ccb1352eSJesse Gross struct sw_flow *flow; 1082ccb1352eSJesse Gross struct hlist_head *head; 108303f0d916SAndy Zhou int key_start = mask->range.start; 108402237373SAndy Zhou int key_end = mask->range.end; 1085ccb1352eSJesse Gross u32 hash; 108603f0d916SAndy Zhou struct sw_flow_key masked_key; 1087ccb1352eSJesse Gross 1088*5828cd9aSAndy Zhou ovs_flow_key_mask(&masked_key, unmasked, mask); 108902237373SAndy Zhou hash = ovs_flow_hash(&masked_key, key_start, key_end); 1090ccb1352eSJesse Gross head = find_bucket(table, hash); 1091b67bfe0dSSasha Levin hlist_for_each_entry_rcu(flow, head, hash_node[table->node_ver]) { 109203f0d916SAndy Zhou if (flow->mask == mask && 1093*5828cd9aSAndy Zhou __flow_cmp_masked_key(flow, &masked_key, 1094*5828cd9aSAndy Zhou key_start, key_end)) 1095ccb1352eSJesse Gross return flow; 1096ccb1352eSJesse Gross } 1097ccb1352eSJesse Gross return NULL; 1098ccb1352eSJesse Gross } 1099ccb1352eSJesse Gross 110003f0d916SAndy Zhou struct sw_flow *ovs_flow_lookup(struct flow_table *tbl, 110103f0d916SAndy Zhou const struct sw_flow_key *key) 1102ccb1352eSJesse Gross { 110303f0d916SAndy Zhou struct sw_flow *flow = NULL; 110403f0d916SAndy Zhou struct sw_flow_mask *mask; 110503f0d916SAndy Zhou 110603f0d916SAndy Zhou list_for_each_entry_rcu(mask, tbl->mask_list, list) { 110703f0d916SAndy Zhou flow = ovs_masked_flow_lookup(tbl, key, mask); 110803f0d916SAndy Zhou if (flow) /* Found */ 110903f0d916SAndy Zhou break; 1110ccb1352eSJesse Gross } 1111ccb1352eSJesse Gross 111203f0d916SAndy Zhou return flow; 111303f0d916SAndy Zhou } 111403f0d916SAndy Zhou 111503f0d916SAndy Zhou 111603f0d916SAndy Zhou void ovs_flow_insert(struct flow_table *table, struct sw_flow *flow) 111703f0d916SAndy Zhou { 111803f0d916SAndy Zhou flow->hash = ovs_flow_hash(&flow->key, flow->mask->range.start, 111903f0d916SAndy Zhou flow->mask->range.end); 112003f0d916SAndy Zhou __tbl_insert(table, flow); 112103f0d916SAndy Zhou } 112203f0d916SAndy Zhou 112303f0d916SAndy Zhou void ovs_flow_remove(struct flow_table *table, struct sw_flow *flow) 1124ccb1352eSJesse Gross { 1125d3e1101cSHong Zhiguo BUG_ON(table->count == 0); 1126ccb1352eSJesse Gross hlist_del_rcu(&flow->hash_node[table->node_ver]); 1127ccb1352eSJesse Gross table->count--; 1128ccb1352eSJesse Gross } 1129ccb1352eSJesse Gross 1130ccb1352eSJesse Gross /* The size of the argument for each %OVS_KEY_ATTR_* Netlink attribute. */ 1131ccb1352eSJesse Gross const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1] = { 1132ccb1352eSJesse Gross [OVS_KEY_ATTR_ENCAP] = -1, 1133ccb1352eSJesse Gross [OVS_KEY_ATTR_PRIORITY] = sizeof(u32), 1134ccb1352eSJesse Gross [OVS_KEY_ATTR_IN_PORT] = sizeof(u32), 113539c7caebSAnsis Atteka [OVS_KEY_ATTR_SKB_MARK] = sizeof(u32), 1136ccb1352eSJesse Gross [OVS_KEY_ATTR_ETHERNET] = sizeof(struct ovs_key_ethernet), 1137ccb1352eSJesse Gross [OVS_KEY_ATTR_VLAN] = sizeof(__be16), 1138ccb1352eSJesse Gross [OVS_KEY_ATTR_ETHERTYPE] = sizeof(__be16), 1139ccb1352eSJesse Gross [OVS_KEY_ATTR_IPV4] = sizeof(struct ovs_key_ipv4), 1140ccb1352eSJesse Gross [OVS_KEY_ATTR_IPV6] = sizeof(struct ovs_key_ipv6), 1141ccb1352eSJesse Gross [OVS_KEY_ATTR_TCP] = sizeof(struct ovs_key_tcp), 1142ccb1352eSJesse Gross [OVS_KEY_ATTR_UDP] = sizeof(struct ovs_key_udp), 1143a175a723SJoe Stringer [OVS_KEY_ATTR_SCTP] = sizeof(struct ovs_key_sctp), 1144ccb1352eSJesse Gross [OVS_KEY_ATTR_ICMP] = sizeof(struct ovs_key_icmp), 1145ccb1352eSJesse Gross [OVS_KEY_ATTR_ICMPV6] = sizeof(struct ovs_key_icmpv6), 1146ccb1352eSJesse Gross [OVS_KEY_ATTR_ARP] = sizeof(struct ovs_key_arp), 1147ccb1352eSJesse Gross [OVS_KEY_ATTR_ND] = sizeof(struct ovs_key_nd), 11487d5437c7SPravin B Shelar [OVS_KEY_ATTR_TUNNEL] = -1, 1149ccb1352eSJesse Gross }; 1150ccb1352eSJesse Gross 115103f0d916SAndy Zhou static bool is_all_zero(const u8 *fp, size_t size) 1152ccb1352eSJesse Gross { 115303f0d916SAndy Zhou int i; 1154ccb1352eSJesse Gross 115503f0d916SAndy Zhou if (!fp) 115603f0d916SAndy Zhou return false; 1157ccb1352eSJesse Gross 115803f0d916SAndy Zhou for (i = 0; i < size; i++) 115903f0d916SAndy Zhou if (fp[i]) 116003f0d916SAndy Zhou return false; 1161ccb1352eSJesse Gross 116203f0d916SAndy Zhou return true; 1163ccb1352eSJesse Gross } 1164ccb1352eSJesse Gross 116503f0d916SAndy Zhou static int __parse_flow_nlattrs(const struct nlattr *attr, 116603f0d916SAndy Zhou const struct nlattr *a[], 116703f0d916SAndy Zhou u64 *attrsp, bool nz) 1168ccb1352eSJesse Gross { 1169ccb1352eSJesse Gross const struct nlattr *nla; 1170ccb1352eSJesse Gross u32 attrs; 1171ccb1352eSJesse Gross int rem; 1172ccb1352eSJesse Gross 117303f0d916SAndy Zhou attrs = *attrsp; 1174ccb1352eSJesse Gross nla_for_each_nested(nla, attr, rem) { 1175ccb1352eSJesse Gross u16 type = nla_type(nla); 1176ccb1352eSJesse Gross int expected_len; 1177ccb1352eSJesse Gross 117803f0d916SAndy Zhou if (type > OVS_KEY_ATTR_MAX) { 117903f0d916SAndy Zhou OVS_NLERR("Unknown key attribute (type=%d, max=%d).\n", 118003f0d916SAndy Zhou type, OVS_KEY_ATTR_MAX); 118103f0d916SAndy Zhou } 118203f0d916SAndy Zhou 118303f0d916SAndy Zhou if (attrs & (1 << type)) { 118403f0d916SAndy Zhou OVS_NLERR("Duplicate key attribute (type %d).\n", type); 1185ccb1352eSJesse Gross return -EINVAL; 118603f0d916SAndy Zhou } 1187ccb1352eSJesse Gross 1188ccb1352eSJesse Gross expected_len = ovs_key_lens[type]; 118903f0d916SAndy Zhou if (nla_len(nla) != expected_len && expected_len != -1) { 119003f0d916SAndy Zhou OVS_NLERR("Key attribute has unexpected length (type=%d" 119103f0d916SAndy Zhou ", length=%d, expected=%d).\n", type, 119203f0d916SAndy Zhou nla_len(nla), expected_len); 1193ccb1352eSJesse Gross return -EINVAL; 119403f0d916SAndy Zhou } 1195ccb1352eSJesse Gross 119603f0d916SAndy Zhou if (!nz || !is_all_zero(nla_data(nla), expected_len)) { 1197ccb1352eSJesse Gross attrs |= 1 << type; 1198ccb1352eSJesse Gross a[type] = nla; 1199ccb1352eSJesse Gross } 120003f0d916SAndy Zhou } 120103f0d916SAndy Zhou if (rem) { 120203f0d916SAndy Zhou OVS_NLERR("Message has %d unknown bytes.\n", rem); 1203ccb1352eSJesse Gross return -EINVAL; 120403f0d916SAndy Zhou } 1205ccb1352eSJesse Gross 1206ccb1352eSJesse Gross *attrsp = attrs; 1207ccb1352eSJesse Gross return 0; 1208ccb1352eSJesse Gross } 1209ccb1352eSJesse Gross 121003f0d916SAndy Zhou static int parse_flow_mask_nlattrs(const struct nlattr *attr, 121103f0d916SAndy Zhou const struct nlattr *a[], u64 *attrsp) 121203f0d916SAndy Zhou { 121303f0d916SAndy Zhou return __parse_flow_nlattrs(attr, a, attrsp, true); 121403f0d916SAndy Zhou } 121503f0d916SAndy Zhou 121603f0d916SAndy Zhou static int parse_flow_nlattrs(const struct nlattr *attr, 121703f0d916SAndy Zhou const struct nlattr *a[], u64 *attrsp) 121803f0d916SAndy Zhou { 121903f0d916SAndy Zhou return __parse_flow_nlattrs(attr, a, attrsp, false); 122003f0d916SAndy Zhou } 122103f0d916SAndy Zhou 12227d5437c7SPravin B Shelar int ovs_ipv4_tun_from_nlattr(const struct nlattr *attr, 122303f0d916SAndy Zhou struct sw_flow_match *match, bool is_mask) 12247d5437c7SPravin B Shelar { 12257d5437c7SPravin B Shelar struct nlattr *a; 12267d5437c7SPravin B Shelar int rem; 12277d5437c7SPravin B Shelar bool ttl = false; 122803f0d916SAndy Zhou __be16 tun_flags = 0; 12297d5437c7SPravin B Shelar 12307d5437c7SPravin B Shelar nla_for_each_nested(a, attr, rem) { 12317d5437c7SPravin B Shelar int type = nla_type(a); 12327d5437c7SPravin B Shelar static const u32 ovs_tunnel_key_lens[OVS_TUNNEL_KEY_ATTR_MAX + 1] = { 12337d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_ID] = sizeof(u64), 12347d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_IPV4_SRC] = sizeof(u32), 12357d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_IPV4_DST] = sizeof(u32), 12367d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_TOS] = 1, 12377d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_TTL] = 1, 12387d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT] = 0, 12397d5437c7SPravin B Shelar [OVS_TUNNEL_KEY_ATTR_CSUM] = 0, 12407d5437c7SPravin B Shelar }; 12417d5437c7SPravin B Shelar 124203f0d916SAndy Zhou if (type > OVS_TUNNEL_KEY_ATTR_MAX) { 124303f0d916SAndy Zhou OVS_NLERR("Unknown IPv4 tunnel attribute (type=%d, max=%d).\n", 124403f0d916SAndy Zhou type, OVS_TUNNEL_KEY_ATTR_MAX); 12457d5437c7SPravin B Shelar return -EINVAL; 124603f0d916SAndy Zhou } 124703f0d916SAndy Zhou 124803f0d916SAndy Zhou if (ovs_tunnel_key_lens[type] != nla_len(a)) { 124903f0d916SAndy Zhou OVS_NLERR("IPv4 tunnel attribute type has unexpected " 125003f0d916SAndy Zhou " length (type=%d, length=%d, expected=%d).\n", 125103f0d916SAndy Zhou type, nla_len(a), ovs_tunnel_key_lens[type]); 125203f0d916SAndy Zhou return -EINVAL; 125303f0d916SAndy Zhou } 12547d5437c7SPravin B Shelar 12557d5437c7SPravin B Shelar switch (type) { 12567d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_ID: 125703f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.tun_id, 125803f0d916SAndy Zhou nla_get_be64(a), is_mask); 125903f0d916SAndy Zhou tun_flags |= TUNNEL_KEY; 12607d5437c7SPravin B Shelar break; 12617d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_IPV4_SRC: 126203f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.ipv4_src, 126303f0d916SAndy Zhou nla_get_be32(a), is_mask); 12647d5437c7SPravin B Shelar break; 12657d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_IPV4_DST: 126603f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.ipv4_dst, 126703f0d916SAndy Zhou nla_get_be32(a), is_mask); 12687d5437c7SPravin B Shelar break; 12697d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_TOS: 127003f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.ipv4_tos, 127103f0d916SAndy Zhou nla_get_u8(a), is_mask); 12727d5437c7SPravin B Shelar break; 12737d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_TTL: 127403f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.ipv4_ttl, 127503f0d916SAndy Zhou nla_get_u8(a), is_mask); 12767d5437c7SPravin B Shelar ttl = true; 12777d5437c7SPravin B Shelar break; 12787d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT: 127903f0d916SAndy Zhou tun_flags |= TUNNEL_DONT_FRAGMENT; 12807d5437c7SPravin B Shelar break; 12817d5437c7SPravin B Shelar case OVS_TUNNEL_KEY_ATTR_CSUM: 128203f0d916SAndy Zhou tun_flags |= TUNNEL_CSUM; 12837d5437c7SPravin B Shelar break; 12847d5437c7SPravin B Shelar default: 12857d5437c7SPravin B Shelar return -EINVAL; 12867d5437c7SPravin B Shelar } 12877d5437c7SPravin B Shelar } 12887d5437c7SPravin B Shelar 128903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, tun_key.tun_flags, tun_flags, is_mask); 12907d5437c7SPravin B Shelar 129103f0d916SAndy Zhou if (rem > 0) { 129203f0d916SAndy Zhou OVS_NLERR("IPv4 tunnel attribute has %d unknown bytes.\n", rem); 12937d5437c7SPravin B Shelar return -EINVAL; 129403f0d916SAndy Zhou } 129503f0d916SAndy Zhou 129603f0d916SAndy Zhou if (!is_mask) { 129703f0d916SAndy Zhou if (!match->key->tun_key.ipv4_dst) { 129803f0d916SAndy Zhou OVS_NLERR("IPv4 tunnel destination address is zero.\n"); 129903f0d916SAndy Zhou return -EINVAL; 130003f0d916SAndy Zhou } 130103f0d916SAndy Zhou 130203f0d916SAndy Zhou if (!ttl) { 130303f0d916SAndy Zhou OVS_NLERR("IPv4 tunnel TTL not specified.\n"); 130403f0d916SAndy Zhou return -EINVAL; 130503f0d916SAndy Zhou } 130603f0d916SAndy Zhou } 13077d5437c7SPravin B Shelar 13087d5437c7SPravin B Shelar return 0; 13097d5437c7SPravin B Shelar } 13107d5437c7SPravin B Shelar 13117d5437c7SPravin B Shelar int ovs_ipv4_tun_to_nlattr(struct sk_buff *skb, 131203f0d916SAndy Zhou const struct ovs_key_ipv4_tunnel *tun_key, 131303f0d916SAndy Zhou const struct ovs_key_ipv4_tunnel *output) 13147d5437c7SPravin B Shelar { 13157d5437c7SPravin B Shelar struct nlattr *nla; 13167d5437c7SPravin B Shelar 13177d5437c7SPravin B Shelar nla = nla_nest_start(skb, OVS_KEY_ATTR_TUNNEL); 13187d5437c7SPravin B Shelar if (!nla) 13197d5437c7SPravin B Shelar return -EMSGSIZE; 13207d5437c7SPravin B Shelar 132103f0d916SAndy Zhou if (output->tun_flags & TUNNEL_KEY && 132203f0d916SAndy Zhou nla_put_be64(skb, OVS_TUNNEL_KEY_ATTR_ID, output->tun_id)) 13237d5437c7SPravin B Shelar return -EMSGSIZE; 132403f0d916SAndy Zhou if (output->ipv4_src && 132503f0d916SAndy Zhou nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_SRC, output->ipv4_src)) 13267d5437c7SPravin B Shelar return -EMSGSIZE; 132703f0d916SAndy Zhou if (output->ipv4_dst && 132803f0d916SAndy Zhou nla_put_be32(skb, OVS_TUNNEL_KEY_ATTR_IPV4_DST, output->ipv4_dst)) 13297d5437c7SPravin B Shelar return -EMSGSIZE; 133003f0d916SAndy Zhou if (output->ipv4_tos && 133103f0d916SAndy Zhou nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TOS, output->ipv4_tos)) 13327d5437c7SPravin B Shelar return -EMSGSIZE; 133303f0d916SAndy Zhou if (nla_put_u8(skb, OVS_TUNNEL_KEY_ATTR_TTL, output->ipv4_ttl)) 13347d5437c7SPravin B Shelar return -EMSGSIZE; 133503f0d916SAndy Zhou if ((output->tun_flags & TUNNEL_DONT_FRAGMENT) && 13367d5437c7SPravin B Shelar nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT)) 13377d5437c7SPravin B Shelar return -EMSGSIZE; 133803f0d916SAndy Zhou if ((output->tun_flags & TUNNEL_CSUM) && 13397d5437c7SPravin B Shelar nla_put_flag(skb, OVS_TUNNEL_KEY_ATTR_CSUM)) 13407d5437c7SPravin B Shelar return -EMSGSIZE; 13417d5437c7SPravin B Shelar 13427d5437c7SPravin B Shelar nla_nest_end(skb, nla); 13437d5437c7SPravin B Shelar return 0; 13447d5437c7SPravin B Shelar } 13457d5437c7SPravin B Shelar 134603f0d916SAndy Zhou static int metadata_from_nlattrs(struct sw_flow_match *match, u64 *attrs, 134703f0d916SAndy Zhou const struct nlattr **a, bool is_mask) 1348ccb1352eSJesse Gross { 134903f0d916SAndy Zhou if (*attrs & (1 << OVS_KEY_ATTR_PRIORITY)) { 135003f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, phy.priority, 135103f0d916SAndy Zhou nla_get_u32(a[OVS_KEY_ATTR_PRIORITY]), is_mask); 135203f0d916SAndy Zhou *attrs &= ~(1 << OVS_KEY_ATTR_PRIORITY); 1353ccb1352eSJesse Gross } 135403f0d916SAndy Zhou 135503f0d916SAndy Zhou if (*attrs & (1 << OVS_KEY_ATTR_IN_PORT)) { 1356ccb1352eSJesse Gross u32 in_port = nla_get_u32(a[OVS_KEY_ATTR_IN_PORT]); 135703f0d916SAndy Zhou 135803f0d916SAndy Zhou if (is_mask) 135903f0d916SAndy Zhou in_port = 0xffffffff; /* Always exact match in_port. */ 136003f0d916SAndy Zhou else if (in_port >= DP_MAX_PORTS) 1361ccb1352eSJesse Gross return -EINVAL; 136203f0d916SAndy Zhou 136303f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, phy.in_port, in_port, is_mask); 136403f0d916SAndy Zhou *attrs &= ~(1 << OVS_KEY_ATTR_IN_PORT); 136503f0d916SAndy Zhou } else if (!is_mask) { 136603f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, phy.in_port, DP_MAX_PORTS, is_mask); 136739c7caebSAnsis Atteka } 1368ccb1352eSJesse Gross 136903f0d916SAndy Zhou if (*attrs & (1 << OVS_KEY_ATTR_SKB_MARK)) { 137003f0d916SAndy Zhou uint32_t mark = nla_get_u32(a[OVS_KEY_ATTR_SKB_MARK]); 137103f0d916SAndy Zhou 137203f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, phy.skb_mark, mark, is_mask); 137303f0d916SAndy Zhou *attrs &= ~(1 << OVS_KEY_ATTR_SKB_MARK); 137403f0d916SAndy Zhou } 137503f0d916SAndy Zhou if (*attrs & (1 << OVS_KEY_ATTR_TUNNEL)) { 137603f0d916SAndy Zhou if (ovs_ipv4_tun_from_nlattr(a[OVS_KEY_ATTR_TUNNEL], match, 137703f0d916SAndy Zhou is_mask)) 137803f0d916SAndy Zhou return -EINVAL; 137903f0d916SAndy Zhou *attrs &= ~(1 << OVS_KEY_ATTR_TUNNEL); 138003f0d916SAndy Zhou } 138103f0d916SAndy Zhou return 0; 138203f0d916SAndy Zhou } 138303f0d916SAndy Zhou 138403f0d916SAndy Zhou static int ovs_key_from_nlattrs(struct sw_flow_match *match, u64 attrs, 138503f0d916SAndy Zhou const struct nlattr **a, bool is_mask) 138603f0d916SAndy Zhou { 138703f0d916SAndy Zhou int err; 138803f0d916SAndy Zhou u64 orig_attrs = attrs; 138903f0d916SAndy Zhou 139003f0d916SAndy Zhou err = metadata_from_nlattrs(match, &attrs, a, is_mask); 13917d5437c7SPravin B Shelar if (err) 13927d5437c7SPravin B Shelar return err; 13937d5437c7SPravin B Shelar 139403f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ETHERNET)) { 139503f0d916SAndy Zhou const struct ovs_key_ethernet *eth_key; 1396ccb1352eSJesse Gross 1397ccb1352eSJesse Gross eth_key = nla_data(a[OVS_KEY_ATTR_ETHERNET]); 139803f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, eth.src, 139903f0d916SAndy Zhou eth_key->eth_src, ETH_ALEN, is_mask); 140003f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, eth.dst, 140103f0d916SAndy Zhou eth_key->eth_dst, ETH_ALEN, is_mask); 140203f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ETHERNET); 140303f0d916SAndy Zhou } 1404ccb1352eSJesse Gross 140503f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_VLAN)) { 1406ccb1352eSJesse Gross __be16 tci; 1407ccb1352eSJesse Gross 140803f0d916SAndy Zhou tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); 140903f0d916SAndy Zhou if (!(tci & htons(VLAN_TAG_PRESENT))) { 141003f0d916SAndy Zhou if (is_mask) 141103f0d916SAndy Zhou OVS_NLERR("VLAN TCI mask does not have exact match for VLAN_TAG_PRESENT bit.\n"); 141203f0d916SAndy Zhou else 141303f0d916SAndy Zhou OVS_NLERR("VLAN TCI does not have VLAN_TAG_PRESENT bit set.\n"); 141403f0d916SAndy Zhou 141503f0d916SAndy Zhou return -EINVAL; 141603f0d916SAndy Zhou } 141703f0d916SAndy Zhou 141803f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, eth.tci, tci, is_mask); 141903f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_VLAN); 142003f0d916SAndy Zhou } else if (!is_mask) 142103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, eth.tci, htons(0xffff), true); 142203f0d916SAndy Zhou 142303f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) { 142403f0d916SAndy Zhou __be16 eth_type; 142503f0d916SAndy Zhou 142603f0d916SAndy Zhou eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); 142703f0d916SAndy Zhou if (is_mask) { 142803f0d916SAndy Zhou /* Always exact match EtherType. */ 142903f0d916SAndy Zhou eth_type = htons(0xffff); 143003f0d916SAndy Zhou } else if (ntohs(eth_type) < ETH_P_802_3_MIN) { 143103f0d916SAndy Zhou OVS_NLERR("EtherType is less than minimum (type=%x, min=%x).\n", 143203f0d916SAndy Zhou ntohs(eth_type), ETH_P_802_3_MIN); 143303f0d916SAndy Zhou return -EINVAL; 143403f0d916SAndy Zhou } 143503f0d916SAndy Zhou 143603f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, eth.type, eth_type, is_mask); 143703f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); 143803f0d916SAndy Zhou } else if (!is_mask) { 143903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, eth.type, htons(ETH_P_802_2), is_mask); 144003f0d916SAndy Zhou } 144103f0d916SAndy Zhou 144203f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_IPV4)) { 144303f0d916SAndy Zhou const struct ovs_key_ipv4 *ipv4_key; 144403f0d916SAndy Zhou 144503f0d916SAndy Zhou ipv4_key = nla_data(a[OVS_KEY_ATTR_IPV4]); 144603f0d916SAndy Zhou if (!is_mask && ipv4_key->ipv4_frag > OVS_FRAG_TYPE_MAX) { 144703f0d916SAndy Zhou OVS_NLERR("Unknown IPv4 fragment type (value=%d, max=%d).\n", 144803f0d916SAndy Zhou ipv4_key->ipv4_frag, OVS_FRAG_TYPE_MAX); 144903f0d916SAndy Zhou return -EINVAL; 145003f0d916SAndy Zhou } 145103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.proto, 145203f0d916SAndy Zhou ipv4_key->ipv4_proto, is_mask); 145303f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.tos, 145403f0d916SAndy Zhou ipv4_key->ipv4_tos, is_mask); 145503f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.ttl, 145603f0d916SAndy Zhou ipv4_key->ipv4_ttl, is_mask); 145703f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.frag, 145803f0d916SAndy Zhou ipv4_key->ipv4_frag, is_mask); 145903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.addr.src, 146003f0d916SAndy Zhou ipv4_key->ipv4_src, is_mask); 146103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.addr.dst, 146203f0d916SAndy Zhou ipv4_key->ipv4_dst, is_mask); 146303f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_IPV4); 146403f0d916SAndy Zhou } 146503f0d916SAndy Zhou 146603f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_IPV6)) { 146703f0d916SAndy Zhou const struct ovs_key_ipv6 *ipv6_key; 146803f0d916SAndy Zhou 146903f0d916SAndy Zhou ipv6_key = nla_data(a[OVS_KEY_ATTR_IPV6]); 147003f0d916SAndy Zhou if (!is_mask && ipv6_key->ipv6_frag > OVS_FRAG_TYPE_MAX) { 147103f0d916SAndy Zhou OVS_NLERR("Unknown IPv6 fragment type (value=%d, max=%d).\n", 147203f0d916SAndy Zhou ipv6_key->ipv6_frag, OVS_FRAG_TYPE_MAX); 147303f0d916SAndy Zhou return -EINVAL; 147403f0d916SAndy Zhou } 147503f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.label, 147603f0d916SAndy Zhou ipv6_key->ipv6_label, is_mask); 147703f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.proto, 147803f0d916SAndy Zhou ipv6_key->ipv6_proto, is_mask); 147903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.tos, 148003f0d916SAndy Zhou ipv6_key->ipv6_tclass, is_mask); 148103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.ttl, 148203f0d916SAndy Zhou ipv6_key->ipv6_hlimit, is_mask); 148303f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.frag, 148403f0d916SAndy Zhou ipv6_key->ipv6_frag, is_mask); 148503f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv6.addr.src, 148603f0d916SAndy Zhou ipv6_key->ipv6_src, 148703f0d916SAndy Zhou sizeof(match->key->ipv6.addr.src), 148803f0d916SAndy Zhou is_mask); 148903f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv6.addr.dst, 149003f0d916SAndy Zhou ipv6_key->ipv6_dst, 149103f0d916SAndy Zhou sizeof(match->key->ipv6.addr.dst), 149203f0d916SAndy Zhou is_mask); 149303f0d916SAndy Zhou 149403f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_IPV6); 149503f0d916SAndy Zhou } 149603f0d916SAndy Zhou 149703f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ARP)) { 149803f0d916SAndy Zhou const struct ovs_key_arp *arp_key; 149903f0d916SAndy Zhou 150003f0d916SAndy Zhou arp_key = nla_data(a[OVS_KEY_ATTR_ARP]); 150103f0d916SAndy Zhou if (!is_mask && (arp_key->arp_op & htons(0xff00))) { 150203f0d916SAndy Zhou OVS_NLERR("Unknown ARP opcode (opcode=%d).\n", 150303f0d916SAndy Zhou arp_key->arp_op); 150403f0d916SAndy Zhou return -EINVAL; 150503f0d916SAndy Zhou } 150603f0d916SAndy Zhou 150703f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.addr.src, 150803f0d916SAndy Zhou arp_key->arp_sip, is_mask); 150903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.addr.dst, 151003f0d916SAndy Zhou arp_key->arp_tip, is_mask); 151103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ip.proto, 151203f0d916SAndy Zhou ntohs(arp_key->arp_op), is_mask); 151303f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv4.arp.sha, 151403f0d916SAndy Zhou arp_key->arp_sha, ETH_ALEN, is_mask); 151503f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv4.arp.tha, 151603f0d916SAndy Zhou arp_key->arp_tha, ETH_ALEN, is_mask); 151703f0d916SAndy Zhou 151803f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ARP); 151903f0d916SAndy Zhou } 152003f0d916SAndy Zhou 152103f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_TCP)) { 152203f0d916SAndy Zhou const struct ovs_key_tcp *tcp_key; 152303f0d916SAndy Zhou 152403f0d916SAndy Zhou tcp_key = nla_data(a[OVS_KEY_ATTR_TCP]); 152503f0d916SAndy Zhou if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { 152603f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.src, 152703f0d916SAndy Zhou tcp_key->tcp_src, is_mask); 152803f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.dst, 152903f0d916SAndy Zhou tcp_key->tcp_dst, is_mask); 153003f0d916SAndy Zhou } else { 153103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.src, 153203f0d916SAndy Zhou tcp_key->tcp_src, is_mask); 153303f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.dst, 153403f0d916SAndy Zhou tcp_key->tcp_dst, is_mask); 153503f0d916SAndy Zhou } 153603f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_TCP); 153703f0d916SAndy Zhou } 153803f0d916SAndy Zhou 153903f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_UDP)) { 154003f0d916SAndy Zhou const struct ovs_key_udp *udp_key; 154103f0d916SAndy Zhou 154203f0d916SAndy Zhou udp_key = nla_data(a[OVS_KEY_ATTR_UDP]); 154303f0d916SAndy Zhou if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { 154403f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.src, 154503f0d916SAndy Zhou udp_key->udp_src, is_mask); 154603f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.dst, 154703f0d916SAndy Zhou udp_key->udp_dst, is_mask); 154803f0d916SAndy Zhou } else { 154903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.src, 155003f0d916SAndy Zhou udp_key->udp_src, is_mask); 155103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.dst, 155203f0d916SAndy Zhou udp_key->udp_dst, is_mask); 155303f0d916SAndy Zhou } 155403f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_UDP); 155503f0d916SAndy Zhou } 155603f0d916SAndy Zhou 1557a175a723SJoe Stringer if (attrs & (1 << OVS_KEY_ATTR_SCTP)) { 1558a175a723SJoe Stringer const struct ovs_key_sctp *sctp_key; 1559a175a723SJoe Stringer 1560a175a723SJoe Stringer sctp_key = nla_data(a[OVS_KEY_ATTR_SCTP]); 1561a175a723SJoe Stringer if (orig_attrs & (1 << OVS_KEY_ATTR_IPV4)) { 1562a175a723SJoe Stringer SW_FLOW_KEY_PUT(match, ipv4.tp.src, 1563a175a723SJoe Stringer sctp_key->sctp_src, is_mask); 1564a175a723SJoe Stringer SW_FLOW_KEY_PUT(match, ipv4.tp.dst, 1565a175a723SJoe Stringer sctp_key->sctp_dst, is_mask); 1566a175a723SJoe Stringer } else { 1567a175a723SJoe Stringer SW_FLOW_KEY_PUT(match, ipv6.tp.src, 1568a175a723SJoe Stringer sctp_key->sctp_src, is_mask); 1569a175a723SJoe Stringer SW_FLOW_KEY_PUT(match, ipv6.tp.dst, 1570a175a723SJoe Stringer sctp_key->sctp_dst, is_mask); 1571a175a723SJoe Stringer } 1572a175a723SJoe Stringer attrs &= ~(1 << OVS_KEY_ATTR_SCTP); 1573a175a723SJoe Stringer } 1574a175a723SJoe Stringer 157503f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ICMP)) { 157603f0d916SAndy Zhou const struct ovs_key_icmp *icmp_key; 157703f0d916SAndy Zhou 157803f0d916SAndy Zhou icmp_key = nla_data(a[OVS_KEY_ATTR_ICMP]); 157903f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.src, 158003f0d916SAndy Zhou htons(icmp_key->icmp_type), is_mask); 158103f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv4.tp.dst, 158203f0d916SAndy Zhou htons(icmp_key->icmp_code), is_mask); 158303f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ICMP); 158403f0d916SAndy Zhou } 158503f0d916SAndy Zhou 158603f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ICMPV6)) { 158703f0d916SAndy Zhou const struct ovs_key_icmpv6 *icmpv6_key; 158803f0d916SAndy Zhou 158903f0d916SAndy Zhou icmpv6_key = nla_data(a[OVS_KEY_ATTR_ICMPV6]); 159003f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.src, 159103f0d916SAndy Zhou htons(icmpv6_key->icmpv6_type), is_mask); 159203f0d916SAndy Zhou SW_FLOW_KEY_PUT(match, ipv6.tp.dst, 159303f0d916SAndy Zhou htons(icmpv6_key->icmpv6_code), is_mask); 159403f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ICMPV6); 159503f0d916SAndy Zhou } 159603f0d916SAndy Zhou 159703f0d916SAndy Zhou if (attrs & (1 << OVS_KEY_ATTR_ND)) { 159803f0d916SAndy Zhou const struct ovs_key_nd *nd_key; 159903f0d916SAndy Zhou 160003f0d916SAndy Zhou nd_key = nla_data(a[OVS_KEY_ATTR_ND]); 160103f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv6.nd.target, 160203f0d916SAndy Zhou nd_key->nd_target, 160303f0d916SAndy Zhou sizeof(match->key->ipv6.nd.target), 160403f0d916SAndy Zhou is_mask); 160503f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv6.nd.sll, 160603f0d916SAndy Zhou nd_key->nd_sll, ETH_ALEN, is_mask); 160703f0d916SAndy Zhou SW_FLOW_KEY_MEMCPY(match, ipv6.nd.tll, 160803f0d916SAndy Zhou nd_key->nd_tll, ETH_ALEN, is_mask); 160903f0d916SAndy Zhou attrs &= ~(1 << OVS_KEY_ATTR_ND); 161003f0d916SAndy Zhou } 161103f0d916SAndy Zhou 161203f0d916SAndy Zhou if (attrs != 0) 1613ccb1352eSJesse Gross return -EINVAL; 1614ccb1352eSJesse Gross 161503f0d916SAndy Zhou return 0; 161603f0d916SAndy Zhou } 1617ccb1352eSJesse Gross 161803f0d916SAndy Zhou /** 161903f0d916SAndy Zhou * ovs_match_from_nlattrs - parses Netlink attributes into a flow key and 162003f0d916SAndy Zhou * mask. In case the 'mask' is NULL, the flow is treated as exact match 162103f0d916SAndy Zhou * flow. Otherwise, it is treated as a wildcarded flow, except the mask 162203f0d916SAndy Zhou * does not include any don't care bit. 162303f0d916SAndy Zhou * @match: receives the extracted flow match information. 162403f0d916SAndy Zhou * @key: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute 162503f0d916SAndy Zhou * sequence. The fields should of the packet that triggered the creation 162603f0d916SAndy Zhou * of this flow. 162703f0d916SAndy Zhou * @mask: Optional. Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink 162803f0d916SAndy Zhou * attribute specifies the mask field of the wildcarded flow. 162903f0d916SAndy Zhou */ 163003f0d916SAndy Zhou int ovs_match_from_nlattrs(struct sw_flow_match *match, 163103f0d916SAndy Zhou const struct nlattr *key, 163203f0d916SAndy Zhou const struct nlattr *mask) 163303f0d916SAndy Zhou { 163403f0d916SAndy Zhou const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; 163503f0d916SAndy Zhou const struct nlattr *encap; 163603f0d916SAndy Zhou u64 key_attrs = 0; 163703f0d916SAndy Zhou u64 mask_attrs = 0; 163803f0d916SAndy Zhou bool encap_valid = false; 163903f0d916SAndy Zhou int err; 164003f0d916SAndy Zhou 164103f0d916SAndy Zhou err = parse_flow_nlattrs(key, a, &key_attrs); 164203f0d916SAndy Zhou if (err) 164303f0d916SAndy Zhou return err; 164403f0d916SAndy Zhou 164503f0d916SAndy Zhou if ((key_attrs & (1 << OVS_KEY_ATTR_ETHERNET)) && 164603f0d916SAndy Zhou (key_attrs & (1 << OVS_KEY_ATTR_ETHERTYPE)) && 164703f0d916SAndy Zhou (nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]) == htons(ETH_P_8021Q))) { 164803f0d916SAndy Zhou __be16 tci; 164903f0d916SAndy Zhou 165003f0d916SAndy Zhou if (!((key_attrs & (1 << OVS_KEY_ATTR_VLAN)) && 165103f0d916SAndy Zhou (key_attrs & (1 << OVS_KEY_ATTR_ENCAP)))) { 165203f0d916SAndy Zhou OVS_NLERR("Invalid Vlan frame.\n"); 165303f0d916SAndy Zhou return -EINVAL; 165403f0d916SAndy Zhou } 165503f0d916SAndy Zhou 165603f0d916SAndy Zhou key_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); 165703f0d916SAndy Zhou tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); 165803f0d916SAndy Zhou encap = a[OVS_KEY_ATTR_ENCAP]; 165903f0d916SAndy Zhou key_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); 166003f0d916SAndy Zhou encap_valid = true; 166103f0d916SAndy Zhou 166203f0d916SAndy Zhou if (tci & htons(VLAN_TAG_PRESENT)) { 166303f0d916SAndy Zhou err = parse_flow_nlattrs(encap, a, &key_attrs); 1664ccb1352eSJesse Gross if (err) 1665ccb1352eSJesse Gross return err; 1666ccb1352eSJesse Gross } else if (!tci) { 1667ccb1352eSJesse Gross /* Corner case for truncated 802.1Q header. */ 166803f0d916SAndy Zhou if (nla_len(encap)) { 166903f0d916SAndy Zhou OVS_NLERR("Truncated 802.1Q header has non-zero encap attribute.\n"); 1670ccb1352eSJesse Gross return -EINVAL; 167103f0d916SAndy Zhou } 1672ccb1352eSJesse Gross } else { 167303f0d916SAndy Zhou OVS_NLERR("Encap attribute is set for a non-VLAN frame.\n"); 1674ccb1352eSJesse Gross return -EINVAL; 1675ccb1352eSJesse Gross } 1676ccb1352eSJesse Gross } 1677ccb1352eSJesse Gross 167803f0d916SAndy Zhou err = ovs_key_from_nlattrs(match, key_attrs, a, false); 1679ccb1352eSJesse Gross if (err) 1680ccb1352eSJesse Gross return err; 1681ccb1352eSJesse Gross 168203f0d916SAndy Zhou if (mask) { 168303f0d916SAndy Zhou err = parse_flow_mask_nlattrs(mask, a, &mask_attrs); 1684ccb1352eSJesse Gross if (err) 1685ccb1352eSJesse Gross return err; 1686ccb1352eSJesse Gross 168703f0d916SAndy Zhou if (mask_attrs & 1ULL << OVS_KEY_ATTR_ENCAP) { 168803f0d916SAndy Zhou __be16 eth_type = 0; 168903f0d916SAndy Zhou __be16 tci = 0; 1690ccb1352eSJesse Gross 169103f0d916SAndy Zhou if (!encap_valid) { 169203f0d916SAndy Zhou OVS_NLERR("Encap mask attribute is set for non-VLAN frame.\n"); 1693ccb1352eSJesse Gross return -EINVAL; 1694ccb1352eSJesse Gross } 1695ccb1352eSJesse Gross 169603f0d916SAndy Zhou mask_attrs &= ~(1 << OVS_KEY_ATTR_ENCAP); 169703f0d916SAndy Zhou if (a[OVS_KEY_ATTR_ETHERTYPE]) 169803f0d916SAndy Zhou eth_type = nla_get_be16(a[OVS_KEY_ATTR_ETHERTYPE]); 169903f0d916SAndy Zhou 170003f0d916SAndy Zhou if (eth_type == htons(0xffff)) { 170103f0d916SAndy Zhou mask_attrs &= ~(1 << OVS_KEY_ATTR_ETHERTYPE); 170203f0d916SAndy Zhou encap = a[OVS_KEY_ATTR_ENCAP]; 170303f0d916SAndy Zhou err = parse_flow_mask_nlattrs(encap, a, &mask_attrs); 170403f0d916SAndy Zhou } else { 170503f0d916SAndy Zhou OVS_NLERR("VLAN frames must have an exact match on the TPID (mask=%x).\n", 170603f0d916SAndy Zhou ntohs(eth_type)); 1707ccb1352eSJesse Gross return -EINVAL; 170803f0d916SAndy Zhou } 170903f0d916SAndy Zhou 171003f0d916SAndy Zhou if (a[OVS_KEY_ATTR_VLAN]) 171103f0d916SAndy Zhou tci = nla_get_be16(a[OVS_KEY_ATTR_VLAN]); 171203f0d916SAndy Zhou 171303f0d916SAndy Zhou if (!(tci & htons(VLAN_TAG_PRESENT))) { 171403f0d916SAndy Zhou OVS_NLERR("VLAN tag present bit must have an exact match (tci_mask=%x).\n", ntohs(tci)); 171503f0d916SAndy Zhou return -EINVAL; 171603f0d916SAndy Zhou } 171703f0d916SAndy Zhou } 171803f0d916SAndy Zhou 171903f0d916SAndy Zhou err = ovs_key_from_nlattrs(match, mask_attrs, a, true); 172003f0d916SAndy Zhou if (err) 172103f0d916SAndy Zhou return err; 172203f0d916SAndy Zhou } else { 172303f0d916SAndy Zhou /* Populate exact match flow's key mask. */ 172403f0d916SAndy Zhou if (match->mask) 172503f0d916SAndy Zhou ovs_sw_flow_mask_set(match->mask, &match->range, 0xff); 172603f0d916SAndy Zhou } 172703f0d916SAndy Zhou 172803f0d916SAndy Zhou if (!ovs_match_validate(match, key_attrs, mask_attrs)) 172903f0d916SAndy Zhou return -EINVAL; 1730ccb1352eSJesse Gross 1731ccb1352eSJesse Gross return 0; 1732ccb1352eSJesse Gross } 1733ccb1352eSJesse Gross 1734ccb1352eSJesse Gross /** 1735ccb1352eSJesse Gross * ovs_flow_metadata_from_nlattrs - parses Netlink attributes into a flow key. 173693d8fd15SPravin B Shelar * @flow: Receives extracted in_port, priority, tun_key and skb_mark. 173793d8fd15SPravin B Shelar * @attr: Netlink attribute holding nested %OVS_KEY_ATTR_* Netlink attribute 1738ccb1352eSJesse Gross * sequence. 1739ccb1352eSJesse Gross * 1740ccb1352eSJesse Gross * This parses a series of Netlink attributes that form a flow key, which must 1741ccb1352eSJesse Gross * take the same form accepted by flow_from_nlattrs(), but only enough of it to 1742ccb1352eSJesse Gross * get the metadata, that is, the parts of the flow key that cannot be 1743ccb1352eSJesse Gross * extracted from the packet itself. 1744ccb1352eSJesse Gross */ 174503f0d916SAndy Zhou 174603f0d916SAndy Zhou int ovs_flow_metadata_from_nlattrs(struct sw_flow *flow, 1747ccb1352eSJesse Gross const struct nlattr *attr) 1748ccb1352eSJesse Gross { 17497d5437c7SPravin B Shelar struct ovs_key_ipv4_tunnel *tun_key = &flow->key.tun_key; 175003f0d916SAndy Zhou const struct nlattr *a[OVS_KEY_ATTR_MAX + 1]; 175103f0d916SAndy Zhou u64 attrs = 0; 175203f0d916SAndy Zhou int err; 175303f0d916SAndy Zhou struct sw_flow_match match; 1754ccb1352eSJesse Gross 175593d8fd15SPravin B Shelar flow->key.phy.in_port = DP_MAX_PORTS; 175693d8fd15SPravin B Shelar flow->key.phy.priority = 0; 175793d8fd15SPravin B Shelar flow->key.phy.skb_mark = 0; 17587d5437c7SPravin B Shelar memset(tun_key, 0, sizeof(flow->key.tun_key)); 1759ccb1352eSJesse Gross 176003f0d916SAndy Zhou err = parse_flow_nlattrs(attr, a, &attrs); 176103f0d916SAndy Zhou if (err) 1762ccb1352eSJesse Gross return -EINVAL; 1763ccb1352eSJesse Gross 176403f0d916SAndy Zhou memset(&match, 0, sizeof(match)); 176503f0d916SAndy Zhou match.key = &flow->key; 1766ccb1352eSJesse Gross 176703f0d916SAndy Zhou err = metadata_from_nlattrs(&match, &attrs, a, false); 17687d5437c7SPravin B Shelar if (err) 17697d5437c7SPravin B Shelar return err; 1770a3e82996SPravin B Shelar 1771ccb1352eSJesse Gross return 0; 1772ccb1352eSJesse Gross } 1773ccb1352eSJesse Gross 177403f0d916SAndy Zhou int ovs_flow_to_nlattrs(const struct sw_flow_key *swkey, 177503f0d916SAndy Zhou const struct sw_flow_key *output, struct sk_buff *skb) 1776ccb1352eSJesse Gross { 1777ccb1352eSJesse Gross struct ovs_key_ethernet *eth_key; 1778ccb1352eSJesse Gross struct nlattr *nla, *encap; 177903f0d916SAndy Zhou bool is_mask = (swkey != output); 1780ccb1352eSJesse Gross 178103f0d916SAndy Zhou if (nla_put_u32(skb, OVS_KEY_ATTR_PRIORITY, output->phy.priority)) 1782028d6a67SDavid S. Miller goto nla_put_failure; 1783ccb1352eSJesse Gross 178403f0d916SAndy Zhou if ((swkey->tun_key.ipv4_dst || is_mask) && 178503f0d916SAndy Zhou ovs_ipv4_tun_to_nlattr(skb, &swkey->tun_key, &output->tun_key)) 17867d5437c7SPravin B Shelar goto nla_put_failure; 17877d5437c7SPravin B Shelar 178803f0d916SAndy Zhou if (swkey->phy.in_port == DP_MAX_PORTS) { 178903f0d916SAndy Zhou if (is_mask && (output->phy.in_port == 0xffff)) 179003f0d916SAndy Zhou if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 0xffffffff)) 1791028d6a67SDavid S. Miller goto nla_put_failure; 179203f0d916SAndy Zhou } else { 179303f0d916SAndy Zhou u16 upper_u16; 179403f0d916SAndy Zhou upper_u16 = !is_mask ? 0 : 0xffff; 1795ccb1352eSJesse Gross 179603f0d916SAndy Zhou if (nla_put_u32(skb, OVS_KEY_ATTR_IN_PORT, 179703f0d916SAndy Zhou (upper_u16 << 16) | output->phy.in_port)) 179803f0d916SAndy Zhou goto nla_put_failure; 179903f0d916SAndy Zhou } 180003f0d916SAndy Zhou 180103f0d916SAndy Zhou if (nla_put_u32(skb, OVS_KEY_ATTR_SKB_MARK, output->phy.skb_mark)) 180239c7caebSAnsis Atteka goto nla_put_failure; 180339c7caebSAnsis Atteka 1804ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_ETHERNET, sizeof(*eth_key)); 1805ccb1352eSJesse Gross if (!nla) 1806ccb1352eSJesse Gross goto nla_put_failure; 180703f0d916SAndy Zhou 1808ccb1352eSJesse Gross eth_key = nla_data(nla); 180903f0d916SAndy Zhou memcpy(eth_key->eth_src, output->eth.src, ETH_ALEN); 181003f0d916SAndy Zhou memcpy(eth_key->eth_dst, output->eth.dst, ETH_ALEN); 1811ccb1352eSJesse Gross 1812ccb1352eSJesse Gross if (swkey->eth.tci || swkey->eth.type == htons(ETH_P_8021Q)) { 181303f0d916SAndy Zhou __be16 eth_type; 181403f0d916SAndy Zhou eth_type = !is_mask ? htons(ETH_P_8021Q) : htons(0xffff); 181503f0d916SAndy Zhou if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, eth_type) || 181603f0d916SAndy Zhou nla_put_be16(skb, OVS_KEY_ATTR_VLAN, output->eth.tci)) 1817028d6a67SDavid S. Miller goto nla_put_failure; 1818ccb1352eSJesse Gross encap = nla_nest_start(skb, OVS_KEY_ATTR_ENCAP); 1819ccb1352eSJesse Gross if (!swkey->eth.tci) 1820ccb1352eSJesse Gross goto unencap; 182103f0d916SAndy Zhou } else 1822ccb1352eSJesse Gross encap = NULL; 182303f0d916SAndy Zhou 182403f0d916SAndy Zhou if (swkey->eth.type == htons(ETH_P_802_2)) { 182503f0d916SAndy Zhou /* 182603f0d916SAndy Zhou * Ethertype 802.2 is represented in the netlink with omitted 182703f0d916SAndy Zhou * OVS_KEY_ATTR_ETHERTYPE in the flow key attribute, and 182803f0d916SAndy Zhou * 0xffff in the mask attribute. Ethertype can also 182903f0d916SAndy Zhou * be wildcarded. 183003f0d916SAndy Zhou */ 183103f0d916SAndy Zhou if (is_mask && output->eth.type) 183203f0d916SAndy Zhou if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, 183303f0d916SAndy Zhou output->eth.type)) 183403f0d916SAndy Zhou goto nla_put_failure; 183503f0d916SAndy Zhou goto unencap; 1836ccb1352eSJesse Gross } 1837ccb1352eSJesse Gross 183803f0d916SAndy Zhou if (nla_put_be16(skb, OVS_KEY_ATTR_ETHERTYPE, output->eth.type)) 1839028d6a67SDavid S. Miller goto nla_put_failure; 1840ccb1352eSJesse Gross 1841ccb1352eSJesse Gross if (swkey->eth.type == htons(ETH_P_IP)) { 1842ccb1352eSJesse Gross struct ovs_key_ipv4 *ipv4_key; 1843ccb1352eSJesse Gross 1844ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_IPV4, sizeof(*ipv4_key)); 1845ccb1352eSJesse Gross if (!nla) 1846ccb1352eSJesse Gross goto nla_put_failure; 1847ccb1352eSJesse Gross ipv4_key = nla_data(nla); 184803f0d916SAndy Zhou ipv4_key->ipv4_src = output->ipv4.addr.src; 184903f0d916SAndy Zhou ipv4_key->ipv4_dst = output->ipv4.addr.dst; 185003f0d916SAndy Zhou ipv4_key->ipv4_proto = output->ip.proto; 185103f0d916SAndy Zhou ipv4_key->ipv4_tos = output->ip.tos; 185203f0d916SAndy Zhou ipv4_key->ipv4_ttl = output->ip.ttl; 185303f0d916SAndy Zhou ipv4_key->ipv4_frag = output->ip.frag; 1854ccb1352eSJesse Gross } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 1855ccb1352eSJesse Gross struct ovs_key_ipv6 *ipv6_key; 1856ccb1352eSJesse Gross 1857ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_IPV6, sizeof(*ipv6_key)); 1858ccb1352eSJesse Gross if (!nla) 1859ccb1352eSJesse Gross goto nla_put_failure; 1860ccb1352eSJesse Gross ipv6_key = nla_data(nla); 186103f0d916SAndy Zhou memcpy(ipv6_key->ipv6_src, &output->ipv6.addr.src, 1862ccb1352eSJesse Gross sizeof(ipv6_key->ipv6_src)); 186303f0d916SAndy Zhou memcpy(ipv6_key->ipv6_dst, &output->ipv6.addr.dst, 1864ccb1352eSJesse Gross sizeof(ipv6_key->ipv6_dst)); 186503f0d916SAndy Zhou ipv6_key->ipv6_label = output->ipv6.label; 186603f0d916SAndy Zhou ipv6_key->ipv6_proto = output->ip.proto; 186703f0d916SAndy Zhou ipv6_key->ipv6_tclass = output->ip.tos; 186803f0d916SAndy Zhou ipv6_key->ipv6_hlimit = output->ip.ttl; 186903f0d916SAndy Zhou ipv6_key->ipv6_frag = output->ip.frag; 1870c0618533SMehak Mahajan } else if (swkey->eth.type == htons(ETH_P_ARP) || 1871c0618533SMehak Mahajan swkey->eth.type == htons(ETH_P_RARP)) { 1872ccb1352eSJesse Gross struct ovs_key_arp *arp_key; 1873ccb1352eSJesse Gross 1874ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_ARP, sizeof(*arp_key)); 1875ccb1352eSJesse Gross if (!nla) 1876ccb1352eSJesse Gross goto nla_put_failure; 1877ccb1352eSJesse Gross arp_key = nla_data(nla); 1878ccb1352eSJesse Gross memset(arp_key, 0, sizeof(struct ovs_key_arp)); 187903f0d916SAndy Zhou arp_key->arp_sip = output->ipv4.addr.src; 188003f0d916SAndy Zhou arp_key->arp_tip = output->ipv4.addr.dst; 188103f0d916SAndy Zhou arp_key->arp_op = htons(output->ip.proto); 188203f0d916SAndy Zhou memcpy(arp_key->arp_sha, output->ipv4.arp.sha, ETH_ALEN); 188303f0d916SAndy Zhou memcpy(arp_key->arp_tha, output->ipv4.arp.tha, ETH_ALEN); 1884ccb1352eSJesse Gross } 1885ccb1352eSJesse Gross 1886ccb1352eSJesse Gross if ((swkey->eth.type == htons(ETH_P_IP) || 1887ccb1352eSJesse Gross swkey->eth.type == htons(ETH_P_IPV6)) && 1888ccb1352eSJesse Gross swkey->ip.frag != OVS_FRAG_TYPE_LATER) { 1889ccb1352eSJesse Gross 1890ccb1352eSJesse Gross if (swkey->ip.proto == IPPROTO_TCP) { 1891ccb1352eSJesse Gross struct ovs_key_tcp *tcp_key; 1892ccb1352eSJesse Gross 1893ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_TCP, sizeof(*tcp_key)); 1894ccb1352eSJesse Gross if (!nla) 1895ccb1352eSJesse Gross goto nla_put_failure; 1896ccb1352eSJesse Gross tcp_key = nla_data(nla); 1897ccb1352eSJesse Gross if (swkey->eth.type == htons(ETH_P_IP)) { 189803f0d916SAndy Zhou tcp_key->tcp_src = output->ipv4.tp.src; 189903f0d916SAndy Zhou tcp_key->tcp_dst = output->ipv4.tp.dst; 1900ccb1352eSJesse Gross } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 190103f0d916SAndy Zhou tcp_key->tcp_src = output->ipv6.tp.src; 190203f0d916SAndy Zhou tcp_key->tcp_dst = output->ipv6.tp.dst; 1903ccb1352eSJesse Gross } 1904ccb1352eSJesse Gross } else if (swkey->ip.proto == IPPROTO_UDP) { 1905ccb1352eSJesse Gross struct ovs_key_udp *udp_key; 1906ccb1352eSJesse Gross 1907ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_UDP, sizeof(*udp_key)); 1908ccb1352eSJesse Gross if (!nla) 1909ccb1352eSJesse Gross goto nla_put_failure; 1910ccb1352eSJesse Gross udp_key = nla_data(nla); 1911ccb1352eSJesse Gross if (swkey->eth.type == htons(ETH_P_IP)) { 191203f0d916SAndy Zhou udp_key->udp_src = output->ipv4.tp.src; 191303f0d916SAndy Zhou udp_key->udp_dst = output->ipv4.tp.dst; 1914ccb1352eSJesse Gross } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 191503f0d916SAndy Zhou udp_key->udp_src = output->ipv6.tp.src; 191603f0d916SAndy Zhou udp_key->udp_dst = output->ipv6.tp.dst; 1917ccb1352eSJesse Gross } 1918a175a723SJoe Stringer } else if (swkey->ip.proto == IPPROTO_SCTP) { 1919a175a723SJoe Stringer struct ovs_key_sctp *sctp_key; 1920a175a723SJoe Stringer 1921a175a723SJoe Stringer nla = nla_reserve(skb, OVS_KEY_ATTR_SCTP, sizeof(*sctp_key)); 1922a175a723SJoe Stringer if (!nla) 1923a175a723SJoe Stringer goto nla_put_failure; 1924a175a723SJoe Stringer sctp_key = nla_data(nla); 1925a175a723SJoe Stringer if (swkey->eth.type == htons(ETH_P_IP)) { 1926a175a723SJoe Stringer sctp_key->sctp_src = swkey->ipv4.tp.src; 1927a175a723SJoe Stringer sctp_key->sctp_dst = swkey->ipv4.tp.dst; 1928a175a723SJoe Stringer } else if (swkey->eth.type == htons(ETH_P_IPV6)) { 1929a175a723SJoe Stringer sctp_key->sctp_src = swkey->ipv6.tp.src; 1930a175a723SJoe Stringer sctp_key->sctp_dst = swkey->ipv6.tp.dst; 1931a175a723SJoe Stringer } 1932ccb1352eSJesse Gross } else if (swkey->eth.type == htons(ETH_P_IP) && 1933ccb1352eSJesse Gross swkey->ip.proto == IPPROTO_ICMP) { 1934ccb1352eSJesse Gross struct ovs_key_icmp *icmp_key; 1935ccb1352eSJesse Gross 1936ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_ICMP, sizeof(*icmp_key)); 1937ccb1352eSJesse Gross if (!nla) 1938ccb1352eSJesse Gross goto nla_put_failure; 1939ccb1352eSJesse Gross icmp_key = nla_data(nla); 194003f0d916SAndy Zhou icmp_key->icmp_type = ntohs(output->ipv4.tp.src); 194103f0d916SAndy Zhou icmp_key->icmp_code = ntohs(output->ipv4.tp.dst); 1942ccb1352eSJesse Gross } else if (swkey->eth.type == htons(ETH_P_IPV6) && 1943ccb1352eSJesse Gross swkey->ip.proto == IPPROTO_ICMPV6) { 1944ccb1352eSJesse Gross struct ovs_key_icmpv6 *icmpv6_key; 1945ccb1352eSJesse Gross 1946ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_ICMPV6, 1947ccb1352eSJesse Gross sizeof(*icmpv6_key)); 1948ccb1352eSJesse Gross if (!nla) 1949ccb1352eSJesse Gross goto nla_put_failure; 1950ccb1352eSJesse Gross icmpv6_key = nla_data(nla); 195103f0d916SAndy Zhou icmpv6_key->icmpv6_type = ntohs(output->ipv6.tp.src); 195203f0d916SAndy Zhou icmpv6_key->icmpv6_code = ntohs(output->ipv6.tp.dst); 1953ccb1352eSJesse Gross 1954ccb1352eSJesse Gross if (icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_SOLICITATION || 1955ccb1352eSJesse Gross icmpv6_key->icmpv6_type == NDISC_NEIGHBOUR_ADVERTISEMENT) { 1956ccb1352eSJesse Gross struct ovs_key_nd *nd_key; 1957ccb1352eSJesse Gross 1958ccb1352eSJesse Gross nla = nla_reserve(skb, OVS_KEY_ATTR_ND, sizeof(*nd_key)); 1959ccb1352eSJesse Gross if (!nla) 1960ccb1352eSJesse Gross goto nla_put_failure; 1961ccb1352eSJesse Gross nd_key = nla_data(nla); 196203f0d916SAndy Zhou memcpy(nd_key->nd_target, &output->ipv6.nd.target, 1963ccb1352eSJesse Gross sizeof(nd_key->nd_target)); 196403f0d916SAndy Zhou memcpy(nd_key->nd_sll, output->ipv6.nd.sll, ETH_ALEN); 196503f0d916SAndy Zhou memcpy(nd_key->nd_tll, output->ipv6.nd.tll, ETH_ALEN); 1966ccb1352eSJesse Gross } 1967ccb1352eSJesse Gross } 1968ccb1352eSJesse Gross } 1969ccb1352eSJesse Gross 1970ccb1352eSJesse Gross unencap: 1971ccb1352eSJesse Gross if (encap) 1972ccb1352eSJesse Gross nla_nest_end(skb, encap); 1973ccb1352eSJesse Gross 1974ccb1352eSJesse Gross return 0; 1975ccb1352eSJesse Gross 1976ccb1352eSJesse Gross nla_put_failure: 1977ccb1352eSJesse Gross return -EMSGSIZE; 1978ccb1352eSJesse Gross } 1979ccb1352eSJesse Gross 1980ccb1352eSJesse Gross /* Initializes the flow module. 1981ccb1352eSJesse Gross * Returns zero if successful or a negative error code. */ 1982ccb1352eSJesse Gross int ovs_flow_init(void) 1983ccb1352eSJesse Gross { 1984*5828cd9aSAndy Zhou BUILD_BUG_ON(sizeof(struct sw_flow_key) % sizeof(long)); 1985*5828cd9aSAndy Zhou 1986ccb1352eSJesse Gross flow_cache = kmem_cache_create("sw_flow", sizeof(struct sw_flow), 0, 1987ccb1352eSJesse Gross 0, NULL); 1988ccb1352eSJesse Gross if (flow_cache == NULL) 1989ccb1352eSJesse Gross return -ENOMEM; 1990ccb1352eSJesse Gross 1991ccb1352eSJesse Gross return 0; 1992ccb1352eSJesse Gross } 1993ccb1352eSJesse Gross 1994ccb1352eSJesse Gross /* Uninitializes the flow module. */ 1995ccb1352eSJesse Gross void ovs_flow_exit(void) 1996ccb1352eSJesse Gross { 1997ccb1352eSJesse Gross kmem_cache_destroy(flow_cache); 1998ccb1352eSJesse Gross } 199903f0d916SAndy Zhou 200003f0d916SAndy Zhou struct sw_flow_mask *ovs_sw_flow_mask_alloc(void) 200103f0d916SAndy Zhou { 200203f0d916SAndy Zhou struct sw_flow_mask *mask; 200303f0d916SAndy Zhou 200403f0d916SAndy Zhou mask = kmalloc(sizeof(*mask), GFP_KERNEL); 200503f0d916SAndy Zhou if (mask) 200603f0d916SAndy Zhou mask->ref_count = 0; 200703f0d916SAndy Zhou 200803f0d916SAndy Zhou return mask; 200903f0d916SAndy Zhou } 201003f0d916SAndy Zhou 201103f0d916SAndy Zhou void ovs_sw_flow_mask_add_ref(struct sw_flow_mask *mask) 201203f0d916SAndy Zhou { 201303f0d916SAndy Zhou mask->ref_count++; 201403f0d916SAndy Zhou } 201503f0d916SAndy Zhou 201603f0d916SAndy Zhou void ovs_sw_flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred) 201703f0d916SAndy Zhou { 201803f0d916SAndy Zhou if (!mask) 201903f0d916SAndy Zhou return; 202003f0d916SAndy Zhou 202103f0d916SAndy Zhou BUG_ON(!mask->ref_count); 202203f0d916SAndy Zhou mask->ref_count--; 202303f0d916SAndy Zhou 202403f0d916SAndy Zhou if (!mask->ref_count) { 202503f0d916SAndy Zhou list_del_rcu(&mask->list); 202603f0d916SAndy Zhou if (deferred) 202703f0d916SAndy Zhou kfree_rcu(mask, rcu); 202803f0d916SAndy Zhou else 202903f0d916SAndy Zhou kfree(mask); 203003f0d916SAndy Zhou } 203103f0d916SAndy Zhou } 203203f0d916SAndy Zhou 203303f0d916SAndy Zhou static bool ovs_sw_flow_mask_equal(const struct sw_flow_mask *a, 203403f0d916SAndy Zhou const struct sw_flow_mask *b) 203503f0d916SAndy Zhou { 203603f0d916SAndy Zhou u8 *a_ = (u8 *)&a->key + a->range.start; 203703f0d916SAndy Zhou u8 *b_ = (u8 *)&b->key + b->range.start; 203803f0d916SAndy Zhou 203903f0d916SAndy Zhou return (a->range.end == b->range.end) 204003f0d916SAndy Zhou && (a->range.start == b->range.start) 2041*5828cd9aSAndy Zhou && (memcmp(a_, b_, range_n_bytes(&a->range)) == 0); 204203f0d916SAndy Zhou } 204303f0d916SAndy Zhou 204403f0d916SAndy Zhou struct sw_flow_mask *ovs_sw_flow_mask_find(const struct flow_table *tbl, 204503f0d916SAndy Zhou const struct sw_flow_mask *mask) 204603f0d916SAndy Zhou { 204703f0d916SAndy Zhou struct list_head *ml; 204803f0d916SAndy Zhou 204903f0d916SAndy Zhou list_for_each(ml, tbl->mask_list) { 205003f0d916SAndy Zhou struct sw_flow_mask *m; 205103f0d916SAndy Zhou m = container_of(ml, struct sw_flow_mask, list); 205203f0d916SAndy Zhou if (ovs_sw_flow_mask_equal(mask, m)) 205303f0d916SAndy Zhou return m; 205403f0d916SAndy Zhou } 205503f0d916SAndy Zhou 205603f0d916SAndy Zhou return NULL; 205703f0d916SAndy Zhou } 205803f0d916SAndy Zhou 205903f0d916SAndy Zhou /** 206003f0d916SAndy Zhou * add a new mask into the mask list. 206103f0d916SAndy Zhou * The caller needs to make sure that 'mask' is not the same 206203f0d916SAndy Zhou * as any masks that are already on the list. 206303f0d916SAndy Zhou */ 206403f0d916SAndy Zhou void ovs_sw_flow_mask_insert(struct flow_table *tbl, struct sw_flow_mask *mask) 206503f0d916SAndy Zhou { 206603f0d916SAndy Zhou list_add_rcu(&mask->list, tbl->mask_list); 206703f0d916SAndy Zhou } 206803f0d916SAndy Zhou 206903f0d916SAndy Zhou /** 207003f0d916SAndy Zhou * Set 'range' fields in the mask to the value of 'val'. 207103f0d916SAndy Zhou */ 207203f0d916SAndy Zhou static void ovs_sw_flow_mask_set(struct sw_flow_mask *mask, 207303f0d916SAndy Zhou struct sw_flow_key_range *range, u8 val) 207403f0d916SAndy Zhou { 207503f0d916SAndy Zhou u8 *m = (u8 *)&mask->key + range->start; 207603f0d916SAndy Zhou 207703f0d916SAndy Zhou mask->range = *range; 2078*5828cd9aSAndy Zhou memset(m, val, range_n_bytes(range)); 207903f0d916SAndy Zhou } 2080