net/sched/cls_flower.c

   1 /*
   2  * net/sched/cls_flower.c               Flower classifier
   3  *
   4  * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/rhashtable.h>
  16 #include <linux/workqueue.h>
  17
  18 #include <linux/if_ether.h>
  19 #include <linux/in6.h>
  20 #include <linux/ip.h>
  21 #include <linux/mpls.h>
  22
  23 #include <net/sch_generic.h>
  24 #include <net/pkt_cls.h>
  25 #include <net/ip.h>
  26 #include <net/flow_dissector.h>
  27
  28 #include <net/dst.h>
  29 #include <net/dst_metadata.h>
  30
  31 struct fl_flow_key {
  32         int     indev_ifindex;
  33         struct flow_dissector_key_control control;
  34         struct flow_dissector_key_control enc_control;
  35         struct flow_dissector_key_basic basic;
  36         struct flow_dissector_key_eth_addrs eth;
  37         struct flow_dissector_key_vlan vlan;
  38         union {
  39                 struct flow_dissector_key_ipv4_addrs ipv4;
  40                 struct flow_dissector_key_ipv6_addrs ipv6;
  41         };
  42         struct flow_dissector_key_ports tp;
  43         struct flow_dissector_key_icmp icmp;
  44         struct flow_dissector_key_arp arp;
  45         struct flow_dissector_key_keyid enc_key_id;
  46         union {
  47                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  48                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  49         };
  50         struct flow_dissector_key_ports enc_tp;
  51         struct flow_dissector_key_mpls mpls;
  52         struct flow_dissector_key_tcp tcp;
  53         struct flow_dissector_key_ip ip;
  54 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  55
  56 struct fl_flow_mask_range {
  57         unsigned short int start;
  58         unsigned short int end;
  59 };
  60
  61 struct fl_flow_mask {
  62         struct fl_flow_key key;
  63         struct fl_flow_mask_range range;
  64         struct rcu_head rcu;
  65 };
  66
  67 struct cls_fl_head {
  68         struct rhashtable ht;
  69         struct fl_flow_mask mask;
  70         struct flow_dissector dissector;
  71         bool mask_assigned;
  72         struct list_head filters;
  73         struct rhashtable_params ht_params;
  74         union {
  75                 struct work_struct work;
  76                 struct rcu_head rcu;
  77         };
  78         struct idr handle_idr;
  79 };
  80
  81 struct cls_fl_filter {
  82         struct rhash_head ht_node;
  83         struct fl_flow_key mkey;
  84         struct tcf_exts exts;
  85         struct tcf_result res;
  86         struct fl_flow_key key;
  87         struct list_head list;
  88         u32 handle;
  89         u32 flags;
  90         union {
  91                 struct work_struct work;
  92                 struct rcu_head rcu;
  93         };
  94         struct net_device *hw_dev;
  95 };
  96
  97 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
  98 {
  99         return mask->range.end - mask->range.start;
 100 }
 101
 102 static void fl_mask_update_range(struct fl_flow_mask *mask)
 103 {
 104         const u8 *bytes = (const u8 *) &mask->key;
 105         size_t size = sizeof(mask->key);
 106         size_t i, first = 0, last = size - 1;
 107
 108         for (i = 0; i < sizeof(mask->key); i++) {
 109                 if (bytes[i]) {
 110                         if (!first && i)
 111                                 first = i;
 112                         last = i;
 113                 }
 114         }
 115         mask->range.start = rounddown(first, sizeof(long));
 116         mask->range.end = roundup(last + 1, sizeof(long));
 117 }
 118
 119 static void *fl_key_get_start(struct fl_flow_key *key,
 120                               const struct fl_flow_mask *mask)
 121 {
 122         return (u8 *) key + mask->range.start;
 123 }
 124
 125 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 126                               struct fl_flow_mask *mask)
 127 {
 128         const long *lkey = fl_key_get_start(key, mask);
 129         const long *lmask = fl_key_get_start(&mask->key, mask);
 130         long *lmkey = fl_key_get_start(mkey, mask);
 131         int i;
 132
 133         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 134                 *lmkey++ = *lkey++ & *lmask++;
 135 }
 136
 137 static void fl_clear_masked_range(struct fl_flow_key *key,
 138                                   struct fl_flow_mask *mask)
 139 {
 140         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 141 }
 142
 143 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
 144                                        struct fl_flow_key *mkey)
 145 {
 146         return rhashtable_lookup_fast(&head->ht,
 147                                       fl_key_get_start(mkey, &head->mask),
 148                                       head->ht_params);
 149 }
 150
 151 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 152                        struct tcf_result *res)
 153 {
 154         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 155         struct cls_fl_filter *f;
 156         struct fl_flow_key skb_key;
 157         struct fl_flow_key skb_mkey;
 158
 159         if (!atomic_read(&head->ht.nelems))
 160                 return -1;
 161
 162         fl_clear_masked_range(&skb_key, &head->mask);
 163
 164         skb_key.indev_ifindex = skb->skb_iif;
 165         /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
 166          * so do it rather here.
 167          */
 168         skb_key.basic.n_proto = skb->protocol;
 169         skb_flow_dissect_tunnel_info(skb, &head->dissector, &skb_key);
 170         skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
 171
 172         fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
 173
 174         f = fl_lookup(head, &skb_mkey);
 175         if (f && !tc_skip_sw(f->flags)) {
 176                 *res = f->res;
 177                 return tcf_exts_exec(skb, &f->exts, res);
 178         }
 179         return -1;
 180 }
 181
 182 static int fl_init(struct tcf_proto *tp)
 183 {
 184         struct cls_fl_head *head;
 185
 186         head = kzalloc(sizeof(*head), GFP_KERNEL);
 187         if (!head)
 188                 return -ENOBUFS;
 189
 190         INIT_LIST_HEAD_RCU(&head->filters);
 191         rcu_assign_pointer(tp->root, head);
 192         idr_init(&head->handle_idr);
 193
 194         return 0;
 195 }
 196
 197 static void __fl_destroy_filter(struct cls_fl_filter *f)
 198 {
 199         tcf_exts_destroy(&f->exts);
 200         tcf_exts_put_net(&f->exts);
 201         kfree(f);
 202 }
 203
 204 static void fl_destroy_filter_work(struct work_struct *work)
 205 {
 206         struct cls_fl_filter *f = container_of(work, struct cls_fl_filter, work);
 207
 208         rtnl_lock();
 209         __fl_destroy_filter(f);
 210         rtnl_unlock();
 211 }
 212
 213 static void fl_destroy_filter(struct rcu_head *head)
 214 {
 215         struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
 216
 217         INIT_WORK(&f->work, fl_destroy_filter_work);
 218         tcf_queue_work(&f->work);
 219 }
 220
 221 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
 222 {
 223         struct tc_cls_flower_offload cls_flower = {};
 224         struct tcf_block *block = tp->chain->block;
 225
 226         tc_cls_common_offload_init(&cls_flower.common, tp);
 227         cls_flower.command = TC_CLSFLOWER_DESTROY;
 228         cls_flower.cookie = (unsigned long) f;
 229
 230         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 231                          &cls_flower, false);
 232         tcf_block_offload_dec(block, &f->flags);
 233 }
 234
 235 static int fl_hw_replace_filter(struct tcf_proto *tp,
 236                                 struct flow_dissector *dissector,
 237                                 struct fl_flow_key *mask,
 238                                 struct cls_fl_filter *f)
 239 {
 240         struct tc_cls_flower_offload cls_flower = {};
 241         struct tcf_block *block = tp->chain->block;
 242         bool skip_sw = tc_skip_sw(f->flags);
 243         int err;
 244
 245         tc_cls_common_offload_init(&cls_flower.common, tp);
 246         cls_flower.command = TC_CLSFLOWER_REPLACE;
 247         cls_flower.cookie = (unsigned long) f;
 248         cls_flower.dissector = dissector;
 249         cls_flower.mask = mask;
 250         cls_flower.key = &f->mkey;
 251         cls_flower.exts = &f->exts;
 252         cls_flower.classid = f->res.classid;
 253
 254         err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 255                                &cls_flower, skip_sw);
 256         if (err < 0) {
 257                 fl_hw_destroy_filter(tp, f);
 258                 return err;
 259         } else if (err > 0) {
 260                 tcf_block_offload_inc(block, &f->flags);
 261         }
 262
 263         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 264                 return -EINVAL;
 265
 266         return 0;
 267 }
 268
 269 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 270 {
 271         struct tc_cls_flower_offload cls_flower = {};
 272         struct tcf_block *block = tp->chain->block;
 273
 274         tc_cls_common_offload_init(&cls_flower.common, tp);
 275         cls_flower.command = TC_CLSFLOWER_STATS;
 276         cls_flower.cookie = (unsigned long) f;
 277         cls_flower.exts = &f->exts;
 278         cls_flower.classid = f->res.classid;
 279
 280         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 281                          &cls_flower, false);
 282 }
 283
 284 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 285 {
 286         struct cls_fl_head *head = rtnl_dereference(tp->root);
 287
 288         idr_remove_ext(&head->handle_idr, f->handle);
 289         list_del_rcu(&f->list);
 290         if (!tc_skip_hw(f->flags))
 291                 fl_hw_destroy_filter(tp, f);
 292         tcf_unbind_filter(tp, &f->res);
 293         if (tcf_exts_get_net(&f->exts))
 294                 call_rcu(&f->rcu, fl_destroy_filter);
 295         else
 296                 __fl_destroy_filter(f);
 297 }
 298
 299 static void fl_destroy_sleepable(struct work_struct *work)
 300 {
 301         struct cls_fl_head *head = container_of(work, struct cls_fl_head,
 302                                                 work);
 303         if (head->mask_assigned)
 304                 rhashtable_destroy(&head->ht);
 305         kfree(head);
 306         module_put(THIS_MODULE);
 307 }
 308
 309 static void fl_destroy_rcu(struct rcu_head *rcu)
 310 {
 311         struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
 312
 313         INIT_WORK(&head->work, fl_destroy_sleepable);
 314         schedule_work(&head->work);
 315 }
 316
 317 static void fl_destroy(struct tcf_proto *tp)
 318 {
 319         struct cls_fl_head *head = rtnl_dereference(tp->root);
 320         struct cls_fl_filter *f, *next;
 321
 322         list_for_each_entry_safe(f, next, &head->filters, list)
 323                 __fl_delete(tp, f);
 324         idr_destroy(&head->handle_idr);
 325
 326         __module_get(THIS_MODULE);
 327         call_rcu(&head->rcu, fl_destroy_rcu);
 328 }
 329
 330 static void *fl_get(struct tcf_proto *tp, u32 handle)
 331 {
 332         struct cls_fl_head *head = rtnl_dereference(tp->root);
 333
 334         return idr_find_ext(&head->handle_idr, handle);
 335 }
 336
 337 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 338         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 339         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 340         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 341                                             .len = IFNAMSIZ },
 342         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 343         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 344         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 345         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 346         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 347         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 348         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 349         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 350         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 351         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 352         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 353         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 354         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 355         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 356         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 357         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 358         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 359         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 360         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 361         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 362         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 363         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 364         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 365         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 366         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 367         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 368         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 369         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 370         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 371         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 372         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 373         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 374         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 375         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 376         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 377         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 378         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 379         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 380         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 381         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 382         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 383         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 384         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 385         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 386         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 387         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 388         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 389         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 390         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 391         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 392         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 393         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 394         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 395         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 396         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 397         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 398         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 399         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 400         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 401         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 402         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 403         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 404         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 405         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 406         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 407         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 408         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 409         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 410         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 411         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 412         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 413         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 414 };
 415
 416 static void fl_set_key_val(struct nlattr **tb,
 417                            void *val, int val_type,
 418                            void *mask, int mask_type, int len)
 419 {
 420         if (!tb[val_type])
 421                 return;
 422         memcpy(val, nla_data(tb[val_type]), len);
 423         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 424                 memset(mask, 0xff, len);
 425         else
 426                 memcpy(mask, nla_data(tb[mask_type]), len);
 427 }
 428
 429 static int fl_set_key_mpls(struct nlattr **tb,
 430                            struct flow_dissector_key_mpls *key_val,
 431                            struct flow_dissector_key_mpls *key_mask)
 432 {
 433         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 434                 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 435                 key_mask->mpls_ttl = MPLS_TTL_MASK;
 436         }
 437         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 438                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 439
 440                 if (bos & ~MPLS_BOS_MASK)
 441                         return -EINVAL;
 442                 key_val->mpls_bos = bos;
 443                 key_mask->mpls_bos = MPLS_BOS_MASK;
 444         }
 445         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
 446                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
 447
 448                 if (tc & ~MPLS_TC_MASK)
 449                         return -EINVAL;
 450                 key_val->mpls_tc = tc;
 451                 key_mask->mpls_tc = MPLS_TC_MASK;
 452         }
 453         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 454                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
 455
 456                 if (label & ~MPLS_LABEL_MASK)
 457                         return -EINVAL;
 458                 key_val->mpls_label = label;
 459                 key_mask->mpls_label = MPLS_LABEL_MASK;
 460         }
 461         return 0;
 462 }
 463
 464 static void fl_set_key_vlan(struct nlattr **tb,
 465                             struct flow_dissector_key_vlan *key_val,
 466                             struct flow_dissector_key_vlan *key_mask)
 467 {
 468 #define VLAN_PRIORITY_MASK      0x7
 469
 470         if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
 471                 key_val->vlan_id =
 472                         nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
 473                 key_mask->vlan_id = VLAN_VID_MASK;
 474         }
 475         if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
 476                 key_val->vlan_priority =
 477                         nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
 478                         VLAN_PRIORITY_MASK;
 479                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 480         }
 481 }
 482
 483 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 484                             u32 *dissector_key, u32 *dissector_mask,
 485                             u32 flower_flag_bit, u32 dissector_flag_bit)
 486 {
 487         if (flower_mask & flower_flag_bit) {
 488                 *dissector_mask |= dissector_flag_bit;
 489                 if (flower_key & flower_flag_bit)
 490                         *dissector_key |= dissector_flag_bit;
 491         }
 492 }
 493
 494 static int fl_set_key_flags(struct nlattr **tb,
 495                             u32 *flags_key, u32 *flags_mask)
 496 {
 497         u32 key, mask;
 498
 499         /* mask is mandatory for flags */
 500         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 501                 return -EINVAL;
 502
 503         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 504         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 505
 506         *flags_key  = 0;
 507         *flags_mask = 0;
 508
 509         fl_set_key_flag(key, mask, flags_key, flags_mask,
 510                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 511
 512         return 0;
 513 }
 514
 515 static void fl_set_key_ip(struct nlattr **tb,
 516                           struct flow_dissector_key_ip *key,
 517                           struct flow_dissector_key_ip *mask)
 518 {
 519                 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
 520                                &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
 521                                sizeof(key->tos));
 522
 523                 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
 524                                &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
 525                                sizeof(key->ttl));
 526 }
 527
 528 static int fl_set_key(struct net *net, struct nlattr **tb,
 529                       struct fl_flow_key *key, struct fl_flow_key *mask,
 530                       struct netlink_ext_ack *extack)
 531 {
 532         __be16 ethertype;
 533         int ret = 0;
 534 #ifdef CONFIG_NET_CLS_IND
 535         if (tb[TCA_FLOWER_INDEV]) {
 536                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
 537                 if (err < 0)
 538                         return err;
 539                 key->indev_ifindex = err;
 540                 mask->indev_ifindex = 0xffffffff;
 541         }
 542 #endif
 543
 544         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 545                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 546                        sizeof(key->eth.dst));
 547         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 548                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 549                        sizeof(key->eth.src));
 550
 551         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 552                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 553
 554                 if (ethertype == htons(ETH_P_8021Q)) {
 555                         fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
 556                         fl_set_key_val(tb, &key->basic.n_proto,
 557                                        TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 558                                        &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 559                                        sizeof(key->basic.n_proto));
 560                 } else {
 561                         key->basic.n_proto = ethertype;
 562                         mask->basic.n_proto = cpu_to_be16(~0);
 563                 }
 564         }
 565
 566         if (key->basic.n_proto == htons(ETH_P_IP) ||
 567             key->basic.n_proto == htons(ETH_P_IPV6)) {
 568                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 569                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 570                                sizeof(key->basic.ip_proto));
 571                 fl_set_key_ip(tb, &key->ip, &mask->ip);
 572         }
 573
 574         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 575                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 576                 mask->control.addr_type = ~0;
 577                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 578                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 579                                sizeof(key->ipv4.src));
 580                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 581                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 582                                sizeof(key->ipv4.dst));
 583         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 584                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 585                 mask->control.addr_type = ~0;
 586                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 587                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 588                                sizeof(key->ipv6.src));
 589                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 590                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 591                                sizeof(key->ipv6.dst));
 592         }
 593
 594         if (key->basic.ip_proto == IPPROTO_TCP) {
 595                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 596                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 597                                sizeof(key->tp.src));
 598                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 599                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 600                                sizeof(key->tp.dst));
 601                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
 602                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
 603                                sizeof(key->tcp.flags));
 604         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 605                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 606                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 607                                sizeof(key->tp.src));
 608                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 609                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 610                                sizeof(key->tp.dst));
 611         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 612                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 613                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 614                                sizeof(key->tp.src));
 615                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 616                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 617                                sizeof(key->tp.dst));
 618         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 619                    key->basic.ip_proto == IPPROTO_ICMP) {
 620                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 621                                &mask->icmp.type,
 622                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 623                                sizeof(key->icmp.type));
 624                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 625                                &mask->icmp.code,
 626                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 627                                sizeof(key->icmp.code));
 628         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 629                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 630                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 631                                &mask->icmp.type,
 632                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 633                                sizeof(key->icmp.type));
 634                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
 635                                &mask->icmp.code,
 636                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
 637                                sizeof(key->icmp.code));
 638         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
 639                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
 640                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
 641                 if (ret)
 642                         return ret;
 643         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
 644                    key->basic.n_proto == htons(ETH_P_RARP)) {
 645                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
 646                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
 647                                sizeof(key->arp.sip));
 648                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
 649                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
 650                                sizeof(key->arp.tip));
 651                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
 652                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
 653                                sizeof(key->arp.op));
 654                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
 655                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
 656                                sizeof(key->arp.sha));
 657                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
 658                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
 659                                sizeof(key->arp.tha));
 660         }
 661
 662         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 663             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 664                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 665                 mask->enc_control.addr_type = ~0;
 666                 fl_set_key_val(tb, &key->enc_ipv4.src,
 667                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 668                                &mask->enc_ipv4.src,
 669                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 670                                sizeof(key->enc_ipv4.src));
 671                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 672                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 673                                &mask->enc_ipv4.dst,
 674                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 675                                sizeof(key->enc_ipv4.dst));
 676         }
 677
 678         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 679             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 680                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 681                 mask->enc_control.addr_type = ~0;
 682                 fl_set_key_val(tb, &key->enc_ipv6.src,
 683                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 684                                &mask->enc_ipv6.src,
 685                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 686                                sizeof(key->enc_ipv6.src));
 687                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 688                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 689                                &mask->enc_ipv6.dst,
 690                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 691                                sizeof(key->enc_ipv6.dst));
 692         }
 693
 694         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 695                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 696                        sizeof(key->enc_key_id.keyid));
 697
 698         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 699                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 700                        sizeof(key->enc_tp.src));
 701
 702         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 703                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 704                        sizeof(key->enc_tp.dst));
 705
 706         if (tb[TCA_FLOWER_KEY_FLAGS])
 707                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
 708
 709         return ret;
 710 }
 711
 712 static bool fl_mask_eq(struct fl_flow_mask *mask1,
 713                        struct fl_flow_mask *mask2)
 714 {
 715         const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
 716         const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
 717
 718         return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
 719                !memcmp(lmask1, lmask2, fl_mask_range(mask1));
 720 }
 721
 722 static const struct rhashtable_params fl_ht_params = {
 723         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
 724         .head_offset = offsetof(struct cls_fl_filter, ht_node),
 725         .automatic_shrinking = true,
 726 };
 727
 728 static int fl_init_hashtable(struct cls_fl_head *head,
 729                              struct fl_flow_mask *mask)
 730 {
 731         head->ht_params = fl_ht_params;
 732         head->ht_params.key_len = fl_mask_range(mask);
 733         head->ht_params.key_offset += mask->range.start;
 734
 735         return rhashtable_init(&head->ht, &head->ht_params);
 736 }
 737
 738 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
 739 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
 740
 741 #define FL_KEY_IS_MASKED(mask, member)                                          \
 742         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
 743                    0, FL_KEY_MEMBER_SIZE(member))                               \
 744
 745 #define FL_KEY_SET(keys, cnt, id, member)                                       \
 746         do {                                                                    \
 747                 keys[cnt].key_id = id;                                          \
 748                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
 749                 cnt++;                                                          \
 750         } while(0);
 751
 752 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
 753         do {                                                                    \
 754                 if (FL_KEY_IS_MASKED(mask, member))                             \
 755                         FL_KEY_SET(keys, cnt, id, member);                      \
 756         } while(0);
 757
 758 static void fl_init_dissector(struct cls_fl_head *head,
 759                               struct fl_flow_mask *mask)
 760 {
 761         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
 762         size_t cnt = 0;
 763
 764         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
 765         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
 766         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 767                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
 768         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 769                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
 770         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 771                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
 772         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 773                              FLOW_DISSECTOR_KEY_PORTS, tp);
 774         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 775                              FLOW_DISSECTOR_KEY_IP, ip);
 776         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 777                              FLOW_DISSECTOR_KEY_TCP, tcp);
 778         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 779                              FLOW_DISSECTOR_KEY_ICMP, icmp);
 780         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 781                              FLOW_DISSECTOR_KEY_ARP, arp);
 782         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 783                              FLOW_DISSECTOR_KEY_MPLS, mpls);
 784         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 785                              FLOW_DISSECTOR_KEY_VLAN, vlan);
 786         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 787                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
 788         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 789                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
 790         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 791                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
 792         if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
 793             FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
 794                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
 795                            enc_control);
 796         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 797                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
 798
 799         skb_flow_dissector_init(&head->dissector, keys, cnt);
 800 }
 801
 802 static int fl_check_assign_mask(struct cls_fl_head *head,
 803                                 struct fl_flow_mask *mask)
 804 {
 805         int err;
 806
 807         if (head->mask_assigned) {
 808                 if (!fl_mask_eq(&head->mask, mask))
 809                         return -EINVAL;
 810                 else
 811                         return 0;
 812         }
 813
 814         /* Mask is not assigned yet. So assign it and init hashtable
 815          * according to that.
 816          */
 817         err = fl_init_hashtable(head, mask);
 818         if (err)
 819                 return err;
 820         memcpy(&head->mask, mask, sizeof(head->mask));
 821         head->mask_assigned = true;
 822
 823         fl_init_dissector(head, mask);
 824
 825         return 0;
 826 }
 827
 828 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 829                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
 830                         unsigned long base, struct nlattr **tb,
 831                         struct nlattr *est, bool ovr,
 832                         struct netlink_ext_ack *extack)
 833 {
 834         int err;
 835
 836         err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
 837         if (err < 0)
 838                 return err;
 839
 840         if (tb[TCA_FLOWER_CLASSID]) {
 841                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
 842                 tcf_bind_filter(tp, &f->res, base);
 843         }
 844
 845         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
 846         if (err)
 847                 return err;
 848
 849         fl_mask_update_range(mask);
 850         fl_set_masked_key(&f->mkey, &f->key, mask);
 851
 852         return 0;
 853 }
 854
 855 static int fl_change(struct net *net, struct sk_buff *in_skb,
 856                      struct tcf_proto *tp, unsigned long base,
 857                      u32 handle, struct nlattr **tca,
 858                      void **arg, bool ovr, struct netlink_ext_ack *extack)
 859 {
 860         struct cls_fl_head *head = rtnl_dereference(tp->root);
 861         struct cls_fl_filter *fold = *arg;
 862         struct cls_fl_filter *fnew;
 863         struct nlattr **tb;
 864         struct fl_flow_mask mask = {};
 865         unsigned long idr_index;
 866         int err;
 867
 868         if (!tca[TCA_OPTIONS])
 869                 return -EINVAL;
 870
 871         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
 872         if (!tb)
 873                 return -ENOBUFS;
 874
 875         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
 876                                fl_policy, NULL);
 877         if (err < 0)
 878                 goto errout_tb;
 879
 880         if (fold && handle && fold->handle != handle) {
 881                 err = -EINVAL;
 882                 goto errout_tb;
 883         }
 884
 885         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 886         if (!fnew) {
 887                 err = -ENOBUFS;
 888                 goto errout_tb;
 889         }
 890
 891         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
 892         if (err < 0)
 893                 goto errout;
 894
 895         if (!handle) {
 896                 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
 897                                     1, 0x80000000, GFP_KERNEL);
 898                 if (err)
 899                         goto errout;
 900                 fnew->handle = idr_index;
 901         }
 902
 903         /* user specifies a handle and it doesn't exist */
 904         if (handle && !fold) {
 905                 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index,
 906                                     handle, handle + 1, GFP_KERNEL);
 907                 if (err)
 908                         goto errout;
 909                 fnew->handle = idr_index;
 910         }
 911
 912         if (tb[TCA_FLOWER_FLAGS]) {
 913                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
 914
 915                 if (!tc_flags_valid(fnew->flags)) {
 916                         err = -EINVAL;
 917                         goto errout_idr;
 918                 }
 919         }
 920
 921         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
 922                            extack);
 923         if (err)
 924                 goto errout_idr;
 925
 926         err = fl_check_assign_mask(head, &mask);
 927         if (err)
 928                 goto errout_idr;
 929
 930         if (!tc_skip_sw(fnew->flags)) {
 931                 if (!fold && fl_lookup(head, &fnew->mkey)) {
 932                         err = -EEXIST;
 933                         goto errout_idr;
 934                 }
 935
 936                 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
 937                                              head->ht_params);
 938                 if (err)
 939                         goto errout_idr;
 940         }
 941
 942         if (!tc_skip_hw(fnew->flags)) {
 943                 err = fl_hw_replace_filter(tp,
 944                                            &head->dissector,
 945                                            &mask.key,
 946                                            fnew);
 947                 if (err)
 948                         goto errout_idr;
 949         }
 950
 951         if (!tc_in_hw(fnew->flags))
 952                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
 953
 954         if (fold) {
 955                 if (!tc_skip_sw(fold->flags))
 956                         rhashtable_remove_fast(&head->ht, &fold->ht_node,
 957                                                head->ht_params);
 958                 if (!tc_skip_hw(fold->flags))
 959                         fl_hw_destroy_filter(tp, fold);
 960         }
 961
 962         *arg = fnew;
 963
 964         if (fold) {
 965                 fnew->handle = handle;
 966                 idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
 967                 list_replace_rcu(&fold->list, &fnew->list);
 968                 tcf_unbind_filter(tp, &fold->res);
 969                 tcf_exts_get_net(&fold->exts);
 970                 call_rcu(&fold->rcu, fl_destroy_filter);
 971         } else {
 972                 list_add_tail_rcu(&fnew->list, &head->filters);
 973         }
 974
 975         kfree(tb);
 976         return 0;
 977
 978 errout_idr:
 979         if (fnew->handle)
 980                 idr_remove_ext(&head->handle_idr, fnew->handle);
 981 errout:
 982         tcf_exts_destroy(&fnew->exts);
 983         kfree(fnew);
 984 errout_tb:
 985         kfree(tb);
 986         return err;
 987 }
 988
 989 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
 990                      struct netlink_ext_ack *extack)
 991 {
 992         struct cls_fl_head *head = rtnl_dereference(tp->root);
 993         struct cls_fl_filter *f = arg;
 994
 995         if (!tc_skip_sw(f->flags))
 996                 rhashtable_remove_fast(&head->ht, &f->ht_node,
 997                                        head->ht_params);
 998         __fl_delete(tp, f);
 999         *last = list_empty(&head->filters);
1000         return 0;
1001 }
1002
1003 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1004 {
1005         struct cls_fl_head *head = rtnl_dereference(tp->root);
1006         struct cls_fl_filter *f;
1007
1008         list_for_each_entry_rcu(f, &head->filters, list) {
1009                 if (arg->count < arg->skip)
1010                         goto skip;
1011                 if (arg->fn(tp, f, arg) < 0) {
1012                         arg->stop = 1;
1013                         break;
1014                 }
1015 skip:
1016                 arg->count++;
1017         }
1018 }
1019
1020 static int fl_dump_key_val(struct sk_buff *skb,
1021                            void *val, int val_type,
1022                            void *mask, int mask_type, int len)
1023 {
1024         int err;
1025
1026         if (!memchr_inv(mask, 0, len))
1027                 return 0;
1028         err = nla_put(skb, val_type, len, val);
1029         if (err)
1030                 return err;
1031         if (mask_type != TCA_FLOWER_UNSPEC) {
1032                 err = nla_put(skb, mask_type, len, mask);
1033                 if (err)
1034                         return err;
1035         }
1036         return 0;
1037 }
1038
1039 static int fl_dump_key_mpls(struct sk_buff *skb,
1040                             struct flow_dissector_key_mpls *mpls_key,
1041                             struct flow_dissector_key_mpls *mpls_mask)
1042 {
1043         int err;
1044
1045         if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1046                 return 0;
1047         if (mpls_mask->mpls_ttl) {
1048                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1049                                  mpls_key->mpls_ttl);
1050                 if (err)
1051                         return err;
1052         }
1053         if (mpls_mask->mpls_tc) {
1054                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1055                                  mpls_key->mpls_tc);
1056                 if (err)
1057                         return err;
1058         }
1059         if (mpls_mask->mpls_label) {
1060                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1061                                   mpls_key->mpls_label);
1062                 if (err)
1063                         return err;
1064         }
1065         if (mpls_mask->mpls_bos) {
1066                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1067                                  mpls_key->mpls_bos);
1068                 if (err)
1069                         return err;
1070         }
1071         return 0;
1072 }
1073
1074 static int fl_dump_key_ip(struct sk_buff *skb,
1075                           struct flow_dissector_key_ip *key,
1076                           struct flow_dissector_key_ip *mask)
1077 {
1078         if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1079                             TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1080             fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1081                             TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1082                 return -1;
1083
1084         return 0;
1085 }
1086
1087 static int fl_dump_key_vlan(struct sk_buff *skb,
1088                             struct flow_dissector_key_vlan *vlan_key,
1089                             struct flow_dissector_key_vlan *vlan_mask)
1090 {
1091         int err;
1092
1093         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1094                 return 0;
1095         if (vlan_mask->vlan_id) {
1096                 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1097                                   vlan_key->vlan_id);
1098                 if (err)
1099                         return err;
1100         }
1101         if (vlan_mask->vlan_priority) {
1102                 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1103                                  vlan_key->vlan_priority);
1104                 if (err)
1105                         return err;
1106         }
1107         return 0;
1108 }
1109
1110 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1111                             u32 *flower_key, u32 *flower_mask,
1112                             u32 flower_flag_bit, u32 dissector_flag_bit)
1113 {
1114         if (dissector_mask & dissector_flag_bit) {
1115                 *flower_mask |= flower_flag_bit;
1116                 if (dissector_key & dissector_flag_bit)
1117                         *flower_key |= flower_flag_bit;
1118         }
1119 }
1120
1121 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1122 {
1123         u32 key, mask;
1124         __be32 _key, _mask;
1125         int err;
1126
1127         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1128                 return 0;
1129
1130         key = 0;
1131         mask = 0;
1132
1133         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1134                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1135
1136         _key = cpu_to_be32(key);
1137         _mask = cpu_to_be32(mask);
1138
1139         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1140         if (err)
1141                 return err;
1142
1143         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1144 }
1145
1146 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1147                    struct sk_buff *skb, struct tcmsg *t)
1148 {
1149         struct cls_fl_head *head = rtnl_dereference(tp->root);
1150         struct cls_fl_filter *f = fh;
1151         struct nlattr *nest;
1152         struct fl_flow_key *key, *mask;
1153
1154         if (!f)
1155                 return skb->len;
1156
1157         t->tcm_handle = f->handle;
1158
1159         nest = nla_nest_start(skb, TCA_OPTIONS);
1160         if (!nest)
1161                 goto nla_put_failure;
1162
1163         if (f->res.classid &&
1164             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1165                 goto nla_put_failure;
1166
1167         key = &f->key;
1168         mask = &head->mask.key;
1169
1170         if (mask->indev_ifindex) {
1171                 struct net_device *dev;
1172
1173                 dev = __dev_get_by_index(net, key->indev_ifindex);
1174                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1175                         goto nla_put_failure;
1176         }
1177
1178         if (!tc_skip_hw(f->flags))
1179                 fl_hw_update_stats(tp, f);
1180
1181         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1182                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1183                             sizeof(key->eth.dst)) ||
1184             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1185                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1186                             sizeof(key->eth.src)) ||
1187             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1188                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1189                             sizeof(key->basic.n_proto)))
1190                 goto nla_put_failure;
1191
1192         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1193                 goto nla_put_failure;
1194
1195         if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1196                 goto nla_put_failure;
1197
1198         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1199              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1200             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1201                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1202                             sizeof(key->basic.ip_proto)) ||
1203             fl_dump_key_ip(skb, &key->ip, &mask->ip)))
1204                 goto nla_put_failure;
1205
1206         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1207             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1208                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1209                              sizeof(key->ipv4.src)) ||
1210              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1211                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1212                              sizeof(key->ipv4.dst))))
1213                 goto nla_put_failure;
1214         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1215                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1216                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1217                                   sizeof(key->ipv6.src)) ||
1218                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1219                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1220                                   sizeof(key->ipv6.dst))))
1221                 goto nla_put_failure;
1222
1223         if (key->basic.ip_proto == IPPROTO_TCP &&
1224             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1225                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1226                              sizeof(key->tp.src)) ||
1227              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1228                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1229                              sizeof(key->tp.dst)) ||
1230              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1231                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1232                              sizeof(key->tcp.flags))))
1233                 goto nla_put_failure;
1234         else if (key->basic.ip_proto == IPPROTO_UDP &&
1235                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1236                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1237                                   sizeof(key->tp.src)) ||
1238                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1239                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1240                                   sizeof(key->tp.dst))))
1241                 goto nla_put_failure;
1242         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1243                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1244                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1245                                   sizeof(key->tp.src)) ||
1246                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1247                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1248                                   sizeof(key->tp.dst))))
1249                 goto nla_put_failure;
1250         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1251                  key->basic.ip_proto == IPPROTO_ICMP &&
1252                  (fl_dump_key_val(skb, &key->icmp.type,
1253                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1254                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1255                                   sizeof(key->icmp.type)) ||
1256                   fl_dump_key_val(skb, &key->icmp.code,
1257                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1258                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1259                                   sizeof(key->icmp.code))))
1260                 goto nla_put_failure;
1261         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1262                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1263                  (fl_dump_key_val(skb, &key->icmp.type,
1264                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1265                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1266                                   sizeof(key->icmp.type)) ||
1267                   fl_dump_key_val(skb, &key->icmp.code,
1268                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1269                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1270                                   sizeof(key->icmp.code))))
1271                 goto nla_put_failure;
1272         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1273                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1274                  (fl_dump_key_val(skb, &key->arp.sip,
1275                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1276                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1277                                   sizeof(key->arp.sip)) ||
1278                   fl_dump_key_val(skb, &key->arp.tip,
1279                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1280                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1281                                   sizeof(key->arp.tip)) ||
1282                   fl_dump_key_val(skb, &key->arp.op,
1283                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1284                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1285                                   sizeof(key->arp.op)) ||
1286                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1287                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1288                                   sizeof(key->arp.sha)) ||
1289                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1290                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1291                                   sizeof(key->arp.tha))))
1292                 goto nla_put_failure;
1293
1294         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1295             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1296                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1297                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1298                             sizeof(key->enc_ipv4.src)) ||
1299              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1300                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1301                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1302                              sizeof(key->enc_ipv4.dst))))
1303                 goto nla_put_failure;
1304         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1305                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1306                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1307                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1308                             sizeof(key->enc_ipv6.src)) ||
1309                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1310                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1311                                  &mask->enc_ipv6.dst,
1312                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1313                             sizeof(key->enc_ipv6.dst))))
1314                 goto nla_put_failure;
1315
1316         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1317                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1318                             sizeof(key->enc_key_id)) ||
1319             fl_dump_key_val(skb, &key->enc_tp.src,
1320                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1321                             &mask->enc_tp.src,
1322                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1323                             sizeof(key->enc_tp.src)) ||
1324             fl_dump_key_val(skb, &key->enc_tp.dst,
1325                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1326                             &mask->enc_tp.dst,
1327                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1328                             sizeof(key->enc_tp.dst)))
1329                 goto nla_put_failure;
1330
1331         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1332                 goto nla_put_failure;
1333
1334         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1335                 goto nla_put_failure;
1336
1337         if (tcf_exts_dump(skb, &f->exts))
1338                 goto nla_put_failure;
1339
1340         nla_nest_end(skb, nest);
1341
1342         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1343                 goto nla_put_failure;
1344
1345         return skb->len;
1346
1347 nla_put_failure:
1348         nla_nest_cancel(skb, nest);
1349         return -1;
1350 }
1351
1352 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1353 {
1354         struct cls_fl_filter *f = fh;
1355
1356         if (f && f->res.classid == classid)
1357                 f->res.class = cl;
1358 }
1359
1360 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1361         .kind           = "flower",
1362         .classify       = fl_classify,
1363         .init           = fl_init,
1364         .destroy        = fl_destroy,
1365         .get            = fl_get,
1366         .change         = fl_change,
1367         .delete         = fl_delete,
1368         .walk           = fl_walk,
1369         .dump           = fl_dump,
1370         .bind_class     = fl_bind_class,
1371         .owner          = THIS_MODULE,
1372 };
1373
1374 static int __init cls_fl_init(void)
1375 {
1376         return register_tcf_proto_ops(&cls_fl_ops);
1377 }
1378
1379 static void __exit cls_fl_exit(void)
1380 {
1381         unregister_tcf_proto_ops(&cls_fl_ops);
1382 }
1383
1384 module_init(cls_fl_init);
1385 module_exit(cls_fl_exit);
1386
1387 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1388 MODULE_DESCRIPTION("Flower classifier");
1389 MODULE_LICENSE("GPL v2");