1 /* 2 * Copyright (C) 2017 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/bitfield.h> 35 #include <net/pkt_cls.h> 36 #include <net/switchdev.h> 37 #include <net/tc_act/tc_gact.h> 38 #include <net/tc_act/tc_mirred.h> 39 #include <net/tc_act/tc_pedit.h> 40 #include <net/tc_act/tc_vlan.h> 41 #include <net/tc_act/tc_tunnel_key.h> 42 43 #include "cmsg.h" 44 #include "main.h" 45 #include "../nfp_net_repr.h" 46 47 static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan) 48 { 49 size_t act_size = sizeof(struct nfp_fl_pop_vlan); 50 51 pop_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_POP_VLAN; 52 pop_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ; 53 pop_vlan->reserved = 0; 54 } 55 56 static void 57 nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan, 58 const struct tc_action *action) 59 { 60 size_t act_size = sizeof(struct nfp_fl_push_vlan); 61 u16 tmp_push_vlan_tci; 62 63 push_vlan->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_VLAN; 64 push_vlan->head.len_lw = act_size >> NFP_FL_LW_SIZ; 65 push_vlan->reserved = 0; 66 push_vlan->vlan_tpid = tcf_vlan_push_proto(action); 67 68 tmp_push_vlan_tci = 69 FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, tcf_vlan_push_prio(action)) | 70 FIELD_PREP(NFP_FL_PUSH_VLAN_VID, tcf_vlan_push_vid(action)) | 71 NFP_FL_PUSH_VLAN_CFI; 72 push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci); 73 } 74 75 static bool nfp_fl_netdev_is_tunnel_type(struct net_device *out_dev, 76 enum nfp_flower_tun_type tun_type) 77 { 78 if (!out_dev->rtnl_link_ops) 79 return false; 80 81 if (!strcmp(out_dev->rtnl_link_ops->kind, "vxlan")) 82 return tun_type == NFP_FL_TUNNEL_VXLAN; 83 84 if (!strcmp(out_dev->rtnl_link_ops->kind, "geneve")) 85 return tun_type == NFP_FL_TUNNEL_GENEVE; 86 87 return false; 88 } 89 90 static int 91 nfp_fl_output(struct nfp_fl_output *output, const struct tc_action *action, 92 struct nfp_fl_payload *nfp_flow, bool last, 93 struct net_device *in_dev, enum nfp_flower_tun_type tun_type, 94 int *tun_out_cnt) 95 { 96 size_t act_size = sizeof(struct nfp_fl_output); 97 struct net_device *out_dev; 98 u16 tmp_flags; 99 100 output->head.jump_id = NFP_FL_ACTION_OPCODE_OUTPUT; 101 output->head.len_lw = act_size >> NFP_FL_LW_SIZ; 102 103 out_dev = tcf_mirred_dev(action); 104 if (!out_dev) 105 return -EOPNOTSUPP; 106 107 tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0; 108 109 if (tun_type) { 110 /* Verify the egress netdev matches the tunnel type. */ 111 if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type)) 112 return -EOPNOTSUPP; 113 114 if (*tun_out_cnt) 115 return -EOPNOTSUPP; 116 (*tun_out_cnt)++; 117 118 output->flags = cpu_to_be16(tmp_flags | 119 NFP_FL_OUT_FLAGS_USE_TUN); 120 output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type); 121 } else { 122 /* Set action output parameters. */ 123 output->flags = cpu_to_be16(tmp_flags); 124 125 /* Only offload if egress ports are on the same device as the 126 * ingress port. 127 */ 128 if (!switchdev_port_same_parent_id(in_dev, out_dev)) 129 return -EOPNOTSUPP; 130 if (!nfp_netdev_is_nfp_repr(out_dev)) 131 return -EOPNOTSUPP; 132 133 output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev)); 134 if (!output->port) 135 return -EOPNOTSUPP; 136 } 137 nfp_flow->meta.shortcut = output->port; 138 139 return 0; 140 } 141 142 static enum nfp_flower_tun_type 143 nfp_fl_get_tun_from_act_l4_port(struct nfp_app *app, 144 const struct tc_action *action) 145 { 146 struct ip_tunnel_info *tun = tcf_tunnel_info(action); 147 struct nfp_flower_priv *priv = app->priv; 148 149 switch (tun->key.tp_dst) { 150 case htons(NFP_FL_VXLAN_PORT): 151 return NFP_FL_TUNNEL_VXLAN; 152 case htons(NFP_FL_GENEVE_PORT): 153 if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE) 154 return NFP_FL_TUNNEL_GENEVE; 155 /* FALLTHROUGH */ 156 default: 157 return NFP_FL_TUNNEL_NONE; 158 } 159 } 160 161 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len) 162 { 163 size_t act_size = sizeof(struct nfp_fl_pre_tunnel); 164 struct nfp_fl_pre_tunnel *pre_tun_act; 165 166 /* Pre_tunnel action must be first on action list. 167 * If other actions already exist they need pushed forward. 168 */ 169 if (act_len) 170 memmove(act_data + act_size, act_data, act_len); 171 172 pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data; 173 174 memset(pre_tun_act, 0, act_size); 175 176 pre_tun_act->head.jump_id = NFP_FL_ACTION_OPCODE_PRE_TUNNEL; 177 pre_tun_act->head.len_lw = act_size >> NFP_FL_LW_SIZ; 178 179 return pre_tun_act; 180 } 181 182 static int 183 nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun, 184 const struct tc_action *action, 185 struct nfp_fl_pre_tunnel *pre_tun, 186 enum nfp_flower_tun_type tun_type) 187 { 188 size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun); 189 struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action); 190 u32 tmp_set_ip_tun_type_index = 0; 191 /* Currently support one pre-tunnel so index is always 0. */ 192 int pretun_idx = 0; 193 194 if (ip_tun->options_len) 195 return -EOPNOTSUPP; 196 197 set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL; 198 set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ; 199 200 /* Set tunnel type and pre-tunnel index. */ 201 tmp_set_ip_tun_type_index |= 202 FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, tun_type) | 203 FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx); 204 205 set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index); 206 set_tun->tun_id = ip_tun->key.tun_id; 207 208 /* Complete pre_tunnel action. */ 209 pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst; 210 211 return 0; 212 } 213 214 static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask) 215 { 216 u32 oldvalue = get_unaligned((u32 *)p_exact); 217 u32 oldmask = get_unaligned((u32 *)p_mask); 218 219 value &= mask; 220 value |= oldvalue & ~mask; 221 222 put_unaligned(oldmask | mask, (u32 *)p_mask); 223 put_unaligned(value, (u32 *)p_exact); 224 } 225 226 static int 227 nfp_fl_set_eth(const struct tc_action *action, int idx, u32 off, 228 struct nfp_fl_set_eth *set_eth) 229 { 230 u32 exact, mask; 231 232 if (off + 4 > ETH_ALEN * 2) 233 return -EOPNOTSUPP; 234 235 mask = ~tcf_pedit_mask(action, idx); 236 exact = tcf_pedit_val(action, idx); 237 238 if (exact & ~mask) 239 return -EOPNOTSUPP; 240 241 nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off], 242 &set_eth->eth_addr_mask[off]); 243 244 set_eth->reserved = cpu_to_be16(0); 245 set_eth->head.jump_id = NFP_FL_ACTION_OPCODE_SET_ETHERNET; 246 set_eth->head.len_lw = sizeof(*set_eth) >> NFP_FL_LW_SIZ; 247 248 return 0; 249 } 250 251 static int 252 nfp_fl_set_ip4(const struct tc_action *action, int idx, u32 off, 253 struct nfp_fl_set_ip4_addrs *set_ip_addr) 254 { 255 __be32 exact, mask; 256 257 /* We are expecting tcf_pedit to return a big endian value */ 258 mask = (__force __be32)~tcf_pedit_mask(action, idx); 259 exact = (__force __be32)tcf_pedit_val(action, idx); 260 261 if (exact & ~mask) 262 return -EOPNOTSUPP; 263 264 switch (off) { 265 case offsetof(struct iphdr, daddr): 266 set_ip_addr->ipv4_dst_mask = mask; 267 set_ip_addr->ipv4_dst = exact; 268 break; 269 case offsetof(struct iphdr, saddr): 270 set_ip_addr->ipv4_src_mask = mask; 271 set_ip_addr->ipv4_src = exact; 272 break; 273 default: 274 return -EOPNOTSUPP; 275 } 276 277 set_ip_addr->reserved = cpu_to_be16(0); 278 set_ip_addr->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS; 279 set_ip_addr->head.len_lw = sizeof(*set_ip_addr) >> NFP_FL_LW_SIZ; 280 281 return 0; 282 } 283 284 static void 285 nfp_fl_set_ip6_helper(int opcode_tag, int idx, __be32 exact, __be32 mask, 286 struct nfp_fl_set_ipv6_addr *ip6) 287 { 288 ip6->ipv6[idx % 4].mask = mask; 289 ip6->ipv6[idx % 4].exact = exact; 290 291 ip6->reserved = cpu_to_be16(0); 292 ip6->head.jump_id = opcode_tag; 293 ip6->head.len_lw = sizeof(*ip6) >> NFP_FL_LW_SIZ; 294 } 295 296 static int 297 nfp_fl_set_ip6(const struct tc_action *action, int idx, u32 off, 298 struct nfp_fl_set_ipv6_addr *ip_dst, 299 struct nfp_fl_set_ipv6_addr *ip_src) 300 { 301 __be32 exact, mask; 302 303 /* We are expecting tcf_pedit to return a big endian value */ 304 mask = (__force __be32)~tcf_pedit_mask(action, idx); 305 exact = (__force __be32)tcf_pedit_val(action, idx); 306 307 if (exact & ~mask) 308 return -EOPNOTSUPP; 309 310 if (off < offsetof(struct ipv6hdr, saddr)) 311 return -EOPNOTSUPP; 312 else if (off < offsetof(struct ipv6hdr, daddr)) 313 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_SRC, idx, 314 exact, mask, ip_src); 315 else if (off < offsetof(struct ipv6hdr, daddr) + 316 sizeof(struct in6_addr)) 317 nfp_fl_set_ip6_helper(NFP_FL_ACTION_OPCODE_SET_IPV6_DST, idx, 318 exact, mask, ip_dst); 319 else 320 return -EOPNOTSUPP; 321 322 return 0; 323 } 324 325 static int 326 nfp_fl_set_tport(const struct tc_action *action, int idx, u32 off, 327 struct nfp_fl_set_tport *set_tport, int opcode) 328 { 329 u32 exact, mask; 330 331 if (off) 332 return -EOPNOTSUPP; 333 334 mask = ~tcf_pedit_mask(action, idx); 335 exact = tcf_pedit_val(action, idx); 336 337 if (exact & ~mask) 338 return -EOPNOTSUPP; 339 340 nfp_fl_set_helper32(exact, mask, set_tport->tp_port_val, 341 set_tport->tp_port_mask); 342 343 set_tport->reserved = cpu_to_be16(0); 344 set_tport->head.jump_id = opcode; 345 set_tport->head.len_lw = sizeof(*set_tport) >> NFP_FL_LW_SIZ; 346 347 return 0; 348 } 349 350 static int 351 nfp_fl_pedit(const struct tc_action *action, char *nfp_action, int *a_len) 352 { 353 struct nfp_fl_set_ipv6_addr set_ip6_dst, set_ip6_src; 354 struct nfp_fl_set_ip4_addrs set_ip_addr; 355 struct nfp_fl_set_tport set_tport; 356 struct nfp_fl_set_eth set_eth; 357 enum pedit_header_type htype; 358 int idx, nkeys, err; 359 size_t act_size; 360 u32 offset, cmd; 361 362 memset(&set_ip6_dst, 0, sizeof(set_ip6_dst)); 363 memset(&set_ip6_src, 0, sizeof(set_ip6_src)); 364 memset(&set_ip_addr, 0, sizeof(set_ip_addr)); 365 memset(&set_tport, 0, sizeof(set_tport)); 366 memset(&set_eth, 0, sizeof(set_eth)); 367 nkeys = tcf_pedit_nkeys(action); 368 369 for (idx = 0; idx < nkeys; idx++) { 370 cmd = tcf_pedit_cmd(action, idx); 371 htype = tcf_pedit_htype(action, idx); 372 offset = tcf_pedit_offset(action, idx); 373 374 if (cmd != TCA_PEDIT_KEY_EX_CMD_SET) 375 return -EOPNOTSUPP; 376 377 switch (htype) { 378 case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: 379 err = nfp_fl_set_eth(action, idx, offset, &set_eth); 380 break; 381 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: 382 err = nfp_fl_set_ip4(action, idx, offset, &set_ip_addr); 383 break; 384 case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: 385 err = nfp_fl_set_ip6(action, idx, offset, &set_ip6_dst, 386 &set_ip6_src); 387 break; 388 case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: 389 err = nfp_fl_set_tport(action, idx, offset, &set_tport, 390 NFP_FL_ACTION_OPCODE_SET_TCP); 391 break; 392 case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: 393 err = nfp_fl_set_tport(action, idx, offset, &set_tport, 394 NFP_FL_ACTION_OPCODE_SET_UDP); 395 break; 396 default: 397 return -EOPNOTSUPP; 398 } 399 if (err) 400 return err; 401 } 402 403 if (set_eth.head.len_lw) { 404 act_size = sizeof(set_eth); 405 memcpy(nfp_action, &set_eth, act_size); 406 *a_len += act_size; 407 } else if (set_ip_addr.head.len_lw) { 408 act_size = sizeof(set_ip_addr); 409 memcpy(nfp_action, &set_ip_addr, act_size); 410 *a_len += act_size; 411 } else if (set_ip6_dst.head.len_lw && set_ip6_src.head.len_lw) { 412 /* TC compiles set src and dst IPv6 address as a single action, 413 * the hardware requires this to be 2 separate actions. 414 */ 415 act_size = sizeof(set_ip6_src); 416 memcpy(nfp_action, &set_ip6_src, act_size); 417 *a_len += act_size; 418 419 act_size = sizeof(set_ip6_dst); 420 memcpy(&nfp_action[sizeof(set_ip6_src)], &set_ip6_dst, 421 act_size); 422 *a_len += act_size; 423 } else if (set_ip6_dst.head.len_lw) { 424 act_size = sizeof(set_ip6_dst); 425 memcpy(nfp_action, &set_ip6_dst, act_size); 426 *a_len += act_size; 427 } else if (set_ip6_src.head.len_lw) { 428 act_size = sizeof(set_ip6_src); 429 memcpy(nfp_action, &set_ip6_src, act_size); 430 *a_len += act_size; 431 } else if (set_tport.head.len_lw) { 432 act_size = sizeof(set_tport); 433 memcpy(nfp_action, &set_tport, act_size); 434 *a_len += act_size; 435 } 436 437 return 0; 438 } 439 440 static int 441 nfp_flower_loop_action(const struct tc_action *a, 442 struct nfp_fl_payload *nfp_fl, int *a_len, 443 struct net_device *netdev, 444 enum nfp_flower_tun_type *tun_type, int *tun_out_cnt) 445 { 446 struct nfp_fl_set_ipv4_udp_tun *set_tun; 447 struct nfp_fl_pre_tunnel *pre_tun; 448 struct nfp_fl_push_vlan *psh_v; 449 struct nfp_fl_pop_vlan *pop_v; 450 struct nfp_fl_output *output; 451 int err; 452 453 if (is_tcf_gact_shot(a)) { 454 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP); 455 } else if (is_tcf_mirred_egress_redirect(a)) { 456 if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ) 457 return -EOPNOTSUPP; 458 459 output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len]; 460 err = nfp_fl_output(output, a, nfp_fl, true, netdev, *tun_type, 461 tun_out_cnt); 462 if (err) 463 return err; 464 465 *a_len += sizeof(struct nfp_fl_output); 466 } else if (is_tcf_mirred_egress_mirror(a)) { 467 if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ) 468 return -EOPNOTSUPP; 469 470 output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len]; 471 err = nfp_fl_output(output, a, nfp_fl, false, netdev, *tun_type, 472 tun_out_cnt); 473 if (err) 474 return err; 475 476 *a_len += sizeof(struct nfp_fl_output); 477 } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_POP) { 478 if (*a_len + sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ) 479 return -EOPNOTSUPP; 480 481 pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len]; 482 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV); 483 484 nfp_fl_pop_vlan(pop_v); 485 *a_len += sizeof(struct nfp_fl_pop_vlan); 486 } else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) { 487 if (*a_len + sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ) 488 return -EOPNOTSUPP; 489 490 psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len]; 491 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 492 493 nfp_fl_push_vlan(psh_v, a); 494 *a_len += sizeof(struct nfp_fl_push_vlan); 495 } else if (is_tcf_tunnel_set(a)) { 496 struct nfp_repr *repr = netdev_priv(netdev); 497 *tun_type = nfp_fl_get_tun_from_act_l4_port(repr->app, a); 498 if (*tun_type == NFP_FL_TUNNEL_NONE) 499 return -EOPNOTSUPP; 500 501 /* Pre-tunnel action is required for tunnel encap. 502 * This checks for next hop entries on NFP. 503 * If none, the packet falls back before applying other actions. 504 */ 505 if (*a_len + sizeof(struct nfp_fl_pre_tunnel) + 506 sizeof(struct nfp_fl_set_ipv4_udp_tun) > NFP_FL_MAX_A_SIZ) 507 return -EOPNOTSUPP; 508 509 pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len); 510 nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 511 *a_len += sizeof(struct nfp_fl_pre_tunnel); 512 513 set_tun = (void *)&nfp_fl->action_data[*a_len]; 514 err = nfp_fl_set_ipv4_udp_tun(set_tun, a, pre_tun, *tun_type); 515 if (err) 516 return err; 517 *a_len += sizeof(struct nfp_fl_set_ipv4_udp_tun); 518 } else if (is_tcf_tunnel_release(a)) { 519 /* Tunnel decap is handled by default so accept action. */ 520 return 0; 521 } else if (is_tcf_pedit(a)) { 522 if (nfp_fl_pedit(a, &nfp_fl->action_data[*a_len], a_len)) 523 return -EOPNOTSUPP; 524 } else { 525 /* Currently we do not handle any other actions. */ 526 return -EOPNOTSUPP; 527 } 528 529 return 0; 530 } 531 532 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 533 struct net_device *netdev, 534 struct nfp_fl_payload *nfp_flow) 535 { 536 int act_len, act_cnt, err, tun_out_cnt; 537 enum nfp_flower_tun_type tun_type; 538 const struct tc_action *a; 539 LIST_HEAD(actions); 540 541 memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ); 542 nfp_flow->meta.act_len = 0; 543 tun_type = NFP_FL_TUNNEL_NONE; 544 act_len = 0; 545 act_cnt = 0; 546 tun_out_cnt = 0; 547 548 tcf_exts_to_list(flow->exts, &actions); 549 list_for_each_entry(a, &actions, list) { 550 err = nfp_flower_loop_action(a, nfp_flow, &act_len, netdev, 551 &tun_type, &tun_out_cnt); 552 if (err) 553 return err; 554 act_cnt++; 555 } 556 557 /* We optimise when the action list is small, this can unfortunately 558 * not happen once we have more than one action in the action list. 559 */ 560 if (act_cnt > 1) 561 nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL); 562 563 nfp_flow->meta.act_len = act_len; 564 565 return 0; 566 } 567