package/network/utils/iproute2/patches/090-tc-add-support-for-action-act_ctinfo.patch

   1 From b47fffb0f6dc285fe39613a5838e4e50f4f35202 Mon Sep 17 00:00:00 2001
   2 From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
   3 Date: Fri, 15 Mar 2019 09:35:37 +0000
   4 Subject: [PATCH] tc: add support for action act_ctinfo
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 ctinfo is a tc action restoring data stored in conntrack marks to
  10 various fields.  At present it has two independent modes of operation,
  11 restoration of DSCP into IPv4/v6 diffserv and restoration of conntrack
  12 marks into packet skb marks.
  13
  14 It understands a number of parameters specific to this action in
  15 additional to the usual action syntax.  Each operating mode is
  16 independent of the other so all options are optional, however not
  17 specifying at least one mode is a bit pointless.
  18
  19 Usage: ... ctinfo [dscp mask [statemask]] [cpmark [mask]] [zone ZONE]
  20                   [CONTROL] [index <INDEX>]
  21
  22 DSCP mode
  23
  24 dscp enables copying of a DSCP stored in the conntrack mark into the
  25 ipv4/v6 diffserv field.  The mask is a 32bit field and specifies where
  26 in the conntrack mark the DSCP value is located.  It must be 6
  27 contiguous bits long. eg. 0xfc000000 would restore the DSCP from the
  28 upper 6 bits of the conntrack mark.
  29
  30 The DSCP copying may be optionally controlled by a statemask.  The
  31 statemask is a 32bit field, usually with a single bit set and must not
  32 overlap the dscp mask.  The DSCP restore operation will only take place
  33 if the corresponding bit/s in conntrack mark ANDed with the statemask
  34 yield a non zero result.
  35
  36 eg. dscp 0xfc000000 0x01000000 would retrieve the DSCP from the top 6
  37 bits, whilst using bit 25 as a flag to do so.  Bit 26 is unused in this
  38 example.
  39
  40 CPMARK mode
  41
  42 cpmark enables copying of the conntrack mark to the packet skb mark.  In
  43 this mode it is completely equivalent to the existing act_connmark
  44 action.  Additional functionality is provided by the optional mask
  45 parameter, whereby the stored conntrack mark is logically ANDed with the
  46 cpmark mask before being stored into skb mark.  This allows shared usage
  47 of the conntrack mark between applications.
  48
  49 eg. cpmark 0x00ffffff would restore only the lower 24 bits of the
  50 conntrack mark, thus may be useful in the event that the upper 8 bits
  51 are used by the DSCP function.
  52
  53 Usage: ... ctinfo [dscp mask [statemask]] [cpmark [mask]] [zone ZONE]
  54                   [CONTROL] [index <INDEX>]
  55 where :
  56         dscp MASK is the bitmask to restore DSCP
  57              STATEMASK is the bitmask to determine conditional restoring
  58         cpmark MASK mask applied to restored packet mark
  59         ZONE is the conntrack zone
  60         CONTROL := reclassify | pipe | drop | continue | ok |
  61                    goto chain <CHAIN_INDEX>
  62
  63 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
  64 Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
  65 ---
  66  include/uapi/linux/pkt_cls.h          |   3 +-
  67  include/uapi/linux/tc_act/tc_ctinfo.h |  34 ++++
  68  man/man8/tc-ctinfo.8                  | 170 ++++++++++++++++
  69  tc/Makefile                           |   1 +
  70  tc/m_ctinfo.c                         | 268 ++++++++++++++++++++++++++
  71  5 files changed, 475 insertions(+), 1 deletion(-)
  72  create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h
  73  create mode 100644 man/man8/tc-ctinfo.8
  74  create mode 100644 tc/m_ctinfo.c
  75
  76 diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
  77 index 95d0db2a..a6e7e176 100644
  78 --- a/include/uapi/linux/pkt_cls.h
  79 +++ b/include/uapi/linux/pkt_cls.h
  80 @@ -68,7 +68,8 @@ enum {
  81         TCA_ID_UNSPEC=0,
  82         TCA_ID_POLICE=1,
  83         /* other actions go here */
  84 -       __TCA_ID_MAX=255
  85 +       TCA_ID_CTINFO=27,
  86 +       __TCA_ID_MAX = 255
  87  };
  88
  89  #define TCA_ID_MAX __TCA_ID_MAX
  90 diff --git a/include/uapi/linux/tc_act/tc_ctinfo.h b/include/uapi/linux/tc_act/tc_ctinfo.h
  91 new file mode 100644
  92 index 00000000..da803e05
  93 --- /dev/null
  94 +++ b/include/uapi/linux/tc_act/tc_ctinfo.h
  95 @@ -0,0 +1,34 @@
  96 +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  97 +#ifndef __UAPI_TC_CTINFO_H
  98 +#define __UAPI_TC_CTINFO_H
  99 +
 100 +#include <linux/types.h>
 101 +#include <linux/pkt_cls.h>
 102 +
 103 +struct tc_ctinfo {
 104 +       tc_gen;
 105 +};
 106 +
 107 +enum {
 108 +       TCA_CTINFO_UNSPEC,
 109 +       TCA_CTINFO_PAD,
 110 +       TCA_CTINFO_TM,
 111 +       TCA_CTINFO_ACT,
 112 +       TCA_CTINFO_ZONE,
 113 +       TCA_CTINFO_PARMS_DSCP_MASK,
 114 +       TCA_CTINFO_PARMS_DSCP_STATEMASK,
 115 +       TCA_CTINFO_PARMS_CPMARK_MASK,
 116 +       TCA_CTINFO_STATS_DSCP_SET,
 117 +       TCA_CTINFO_STATS_DSCP_ERROR,
 118 +       TCA_CTINFO_STATS_CPMARK_SET,
 119 +       __TCA_CTINFO_MAX
 120 +};
 121 +
 122 +#define TCA_CTINFO_MAX (__TCA_CTINFO_MAX - 1)
 123 +
 124 +enum {
 125 +       CTINFO_MODE_DSCP        = BIT(0),
 126 +       CTINFO_MODE_CPMARK      = BIT(1)
 127 +};
 128 +
 129 +#endif
 130 diff --git a/man/man8/tc-ctinfo.8 b/man/man8/tc-ctinfo.8
 131 new file mode 100644
 132 index 00000000..096590d1
 133 --- /dev/null
 134 +++ b/man/man8/tc-ctinfo.8
 135 @@ -0,0 +1,170 @@
 136 +.TH "ctinfo action in tc" 8 "4 Jun 2019" "iproute2" "Linux"
 137 +.SH NAME
 138 +ctinfo \- tc connmark processing action
 139 +.SH SYNOPSIS
 140 +.B tc ... action ctinfo
 141 +[
 142 +.B dscp
 143 +MASK [STATEMASK] ] [
 144 +.B cpmark
 145 +[MASK] ] [
 146 +.B zone
 147 +ZONE ] [
 148 +.B CONTROL
 149 +] [
 150 +.B index
 151 +<INDEX>
 152 +]
 153 +
 154 +.SH DESCRIPTION
 155 +CTINFO (Conntrack Information) is a tc action for retrieving data from
 156 +conntrack marks into various fields.  At present it has two independent
 157 +processing modes which may be viewed as sub-functions.
 158 +
 159 +DSCP mode copies a DSCP stored in conntrack's connmark into the IPv4/v6 diffserv
 160 +field.  The copying may conditionally occur based on a flag also stored in the
 161 +connmark.  DSCP mode was designed to assist in restoring packet classifications on
 162 +ingress, classifications which may then be used by qdiscs such as CAKE.  It may be
 163 +used in any circumstance where ingress classification needs to be maintained across
 164 +links that otherwise bleach or remap according to their own policies.
 165 +
 166 +CPMARK (copymark) mode copies the conntrack connmark into the packet's mark field.  Without
 167 +additional parameters it is functionally completely equivalent to the existing
 168 +connmark action.  An optional mask may be specified to mask which bits of the
 169 +connmark are restored.  This may be useful when DSCP and CPMARK modes are combined.
 170 +
 171 +Simple statistics (tc -s) on DSCP restores and CPMARK copies are maintained where values for
 172 +set indicate a count of packets altered for that mode.  DSCP includes an error count
 173 +where the destination packet's diffserv field was unwriteable.
 174 +.SH PARAMETERS
 175 +.SS DSCP mode parameters:
 176 +.IP mask
 177 +A mask of 6 contiguous bits indicating where the DSCP value is located in the 32 bit
 178 +conntrack mark field.  A mask must be provided for this mode.  mask is a 32 bit
 179 +unsigned value.
 180 +.IP statemask
 181 +A mask of at least 1 bit indicating where a conditional restore flag is located in the
 182 +32 bit conntrack mark field.  The statemask bit/s must NOT overlap the mask bits.  The
 183 +DSCP will be restored if the conntrack mark logically ANDed with the statemask yields
 184 +a non-zero result.  statemask is an optional unsigned 32 bit value.
 185 +.SS CPMARK mode parameters:
 186 +.IP mask
 187 +Store the logically ANDed result of conntrack mark and mask into the packet's mark
 188 +field.  Default is 0xffffffff i.e. the whole mark field.  mask is an optional unsigned 32 bit
 189 +value
 190 +.SS Overall action parameters:
 191 +.IP zone
 192 +Specify the conntrack zone when doing conntrack lookups for packets.
 193 +zone is a 16bit unsigned decimal value.
 194 +Default is 0.
 195 +.IP CONTROL
 196 +The following keywords allow to control how the tree of qdisc, classes,
 197 +filters and actions is further traversed after this action.
 198 +.RS
 199 +.TP
 200 +.B reclassify
 201 +Restart with the first filter in the current list.
 202 +.TP
 203 +.B pipe
 204 +Continue with the next action attached to the same filter.
 205 +.TP
 206 +.B drop
 207 +Drop the packet.
 208 +.TP
 209 +.B shot
 210 +synonym for
 211 +.B drop
 212 +.TP
 213 +.B continue
 214 +Continue classification with the next filter in line.
 215 +.TP
 216 +.B pass
 217 +Finish classification process and return to calling qdisc for further packet
 218 +processing. This is the default.
 219 +.RE
 220 +.IP index
 221 +Specify an index for this action in order to being able to identify it in later
 222 +commands. index is a 32bit unsigned decimal value.
 223 +.SH EXAMPLES
 224 +Example showing conditional restoration of DSCP on ingress via an IFB
 225 +.RS
 226 +.EX
 227 +
 228 +#Set up the IFB interface
 229 +.br
 230 +tc qdisc add dev ifb4eth0 handle ffff: ingress
 231 +
 232 +#Put CAKE qdisc on it
 233 +.br
 234 +tc qdisc add dev ifb4eth0 root cake bandwidth 40mbit
 235 +
 236 +#Set interface UP
 237 +.br
 238 +ip link set dev ifb4eth0 up
 239 +
 240 +#Add 2 actions, ctinfo to restore dscp & mirred to redirect the packets to IFB
 241 +.br
 242 +tc filter add dev eth0 parent ffff: protocol all prio 10 u32 \\
 243 +    match u32 0 0 flowid 1:1 action    \\
 244 +    ctinfo dscp 0xfc000000 0x01000000  \\
 245 +    mirred egress redirect dev ifb4eth0
 246 +
 247 +tc -s qdisc show dev eth0 ingress
 248 +
 249 + filter parent ffff: protocol all pref 10 u32 chain 0
 250 + filter parent ffff: protocol all pref 10 u32 chain 0 fh 800: ht divisor 1
 251 + filter parent ffff: protocol all pref 10 u32 chain 0 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:1 not_in_hw
 252 +  match 00000000/00000000 at 0
 253 +    action order 1: ctinfo zone 0 pipe
 254 +    index 2 ref 1 bind 1 dscp 0xfc000000 0x01000000 installed 72 sec used 0 sec DSCP set 1333 error 0 CPMARK set 0
 255 +    Action statistics:
 256 +    Sent 658484 bytes 1833 pkt (dropped 0, overlimits 0 requeues 0)
 257 +    backlog 0b 0p requeues 0
 258 +
 259 +    action order 2: mirred (Egress Redirect to device ifb4eth0) stolen
 260 +    index 1 ref 1 bind 1 installed 72 sec used 0 sec
 261 +    Action statistics:
 262 +    Sent 658484 bytes 1833 pkt (dropped 0, overlimits 0 requeues 0)
 263 +    backlog 0b 0p requeues 0
 264 +.EE
 265 +.RE
 266 +
 267 +Example showing conditional restoration of DSCP on egress
 268 +
 269 +This may appear nonsensical since iptables marking of egress packets is easy
 270 +to achieve, however the iptables flow classification rules may be extensive
 271 +and so some sort of set once and forget may be useful especially on cpu
 272 +constrained devices.
 273 +.RS
 274 +.EX
 275 +
 276 +# Send unmarked connections to a marking chain which needs to store a DSCP
 277 +and set statemask bit in the connmark
 278 +.br
 279 +iptables -t mangle -A POSTROUTING -o eth0 -m connmark \\
 280 +    --mark 0x00000000/0x01000000 -g CLASS_MARKING_CHAIN
 281 +
 282 +# Apply marked DSCP to the packets
 283 +.br
 284 +tc filter add dev eth0 protocol all prio 10 u32 \\
 285 +    match u32 0 0 flowid 1:1 action \\
 286 +    ctinfo dscp 0xfc000000 0x01000000
 287 +
 288 +tc -s filter show dev eth0
 289 + filter parent 800e: protocol all pref 10 u32 chain 0
 290 + filter parent 800e: protocol all pref 10 u32 chain 0 fh 800: ht divisor 1
 291 + filter parent 800e: protocol all pref 10 u32 chain 0 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:1 not_in_hw
 292 +  match 00000000/00000000 at 0
 293 +    action order 1: ctinfo zone 0 pipe
 294 +    index 1 ref 1 bind 1 dscp 0xfc000000 0x01000000 installed 7414 sec used 0 sec DSCP set 53404 error 0 CPMARK set 0
 295 +    Action statistics:
 296 +    Sent 32890260 bytes 120441 pkt (dropped 0, overlimits 0 requeues 0)
 297 +    backlog 0b 0p requeues 0
 298 +.br
 299 +.SH SEE ALSO
 300 +.BR tc (8),
 301 +.BR tc-cake (8)
 302 +.BR tc-connmark (8)
 303 +.BR tc-mirred (8)
 304 +.SH AUTHORS
 305 +ctinfo was written by Kevin Darbyshire-Bryant.
 306 diff --git a/tc/Makefile b/tc/Makefile
 307 index 2edaf2c8..ec93a9a1 100644
 308 --- a/tc/Makefile
 309 +++ b/tc/Makefile
 310 @@ -48,6 +48,7 @@ TCMODULES += m_csum.o
 311  TCMODULES += m_simple.o
 312  TCMODULES += m_vlan.o
 313  TCMODULES += m_connmark.o
 314 +TCMODULES += m_ctinfo.o
 315  TCMODULES += m_bpf.o
 316  TCMODULES += m_tunnel_key.o
 317  TCMODULES += m_sample.o
 318 diff --git a/tc/m_ctinfo.c b/tc/m_ctinfo.c
 319 new file mode 100644
 320 index 00000000..5e451f87
 321 --- /dev/null
 322 +++ b/tc/m_ctinfo.c
 323 @@ -0,0 +1,268 @@
 324 +/* SPDX-License-Identifier: GPL-2.0 */
 325 +/*
 326 + * m_ctinfo.c          netfilter ctinfo mark action
 327 + *
 328 + * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
 329 + */
 330 +
 331 +#include <stdio.h>
 332 +#include <stdlib.h>
 333 +#include <unistd.h>
 334 +#include <string.h>
 335 +#include "utils.h"
 336 +#include "tc_util.h"
 337 +#include <linux/tc_act/tc_ctinfo.h>
 338 +
 339 +static void
 340 +explain(void)
 341 +{
 342 +       fprintf(stderr,
 343 +               "Usage: ... ctinfo [dscp mask [statemask]] [cpmark [mask]] [zone ZONE] [CONTROL] [index <INDEX>]\n"
 344 +               "where :\n"
 345 +               "\tdscp   MASK bitmask location of stored DSCP\n"
 346 +               "\t       STATEMASK bitmask to determine conditional restoring\n"
 347 +               "\tcpmark MASK mask applied to mark on restoration\n"
 348 +               "\tZONE is the conntrack zone\n"
 349 +               "\tCONTROL := reclassify | pipe | drop | continue | ok |\n"
 350 +               "\t           goto chain <CHAIN_INDEX>\n");
 351 +}
 352 +
 353 +static void
 354 +usage(void)
 355 +{
 356 +       explain();
 357 +       exit(-1);
 358 +}
 359 +
 360 +static int
 361 +parse_ctinfo(struct action_util *a, int *argc_p, char ***argv_p, int tca_id,
 362 +            struct nlmsghdr *n)
 363 +{
 364 +       unsigned int cpmarkmask = 0, dscpmask = 0, dscpstatemask = 0;
 365 +       struct tc_ctinfo sel = {};
 366 +       unsigned short zone = 0;
 367 +       char **argv = *argv_p;
 368 +       struct rtattr *tail;
 369 +       int argc = *argc_p;
 370 +       int ok = 0;
 371 +       __u8 i;
 372 +
 373 +       while (argc > 0) {
 374 +               if (matches(*argv, "ctinfo") == 0) {
 375 +                       ok = 1;
 376 +                       NEXT_ARG_FWD();
 377 +               } else if (matches(*argv, "help") == 0) {
 378 +                       usage();
 379 +               } else {
 380 +                       break;
 381 +               }
 382 +
 383 +       }
 384 +
 385 +       if (!ok) {
 386 +               explain();
 387 +               return -1;
 388 +       }
 389 +
 390 +       if (argc) {
 391 +               if (matches(*argv, "dscp") == 0) {
 392 +                       NEXT_ARG();
 393 +                       if (get_u32(&dscpmask, *argv, 0)) {
 394 +                               fprintf(stderr,
 395 +                                       "ctinfo: Illegal dscp \"mask\"\n");
 396 +                               return -1;
 397 +                       }
 398 +                       if (NEXT_ARG_OK()) {
 399 +                               NEXT_ARG_FWD();
 400 +                               if (!get_u32(&dscpstatemask, *argv, 0))
 401 +                                       NEXT_ARG_FWD(); /* was a statemask */
 402 +                       } else {
 403 +                               NEXT_ARG_FWD();
 404 +                       }
 405 +               }
 406 +       }
 407 +
 408 +       /* cpmark has optional mask parameter, so the next arg might not  */
 409 +       /* exist, or it might be the next option, or it may actually be a */
 410 +       /* 32bit mask */
 411 +       if (argc) {
 412 +               if (matches(*argv, "cpmark") == 0) {
 413 +                       cpmarkmask = ~0;
 414 +                       if (NEXT_ARG_OK()) {
 415 +                               NEXT_ARG_FWD();
 416 +                               if (!get_u32(&cpmarkmask, *argv, 0))
 417 +                                       NEXT_ARG_FWD(); /* was a mask */
 418 +                       } else {
 419 +                               NEXT_ARG_FWD();
 420 +                       }
 421 +               }
 422 +       }
 423 +
 424 +       if (argc) {
 425 +               if (matches(*argv, "zone") == 0) {
 426 +                       NEXT_ARG();
 427 +                       if (get_u16(&zone, *argv, 10)) {
 428 +                               fprintf(stderr, "ctinfo: Illegal \"zone\"\n");
 429 +                               return -1;
 430 +                       }
 431 +                       NEXT_ARG_FWD();
 432 +               }
 433 +       }
 434 +
 435 +       parse_action_control_dflt(&argc, &argv, &sel.action,
 436 +                                 false, TC_ACT_PIPE);
 437 +
 438 +       if (argc) {
 439 +               if (matches(*argv, "index") == 0) {
 440 +                       NEXT_ARG();
 441 +                       if (get_u32(&sel.index, *argv, 10)) {
 442 +                               fprintf(stderr, "ctinfo: Illegal \"index\"\n");
 443 +                               return -1;
 444 +                       }
 445 +                       NEXT_ARG_FWD();
 446 +               }
 447 +       }
 448 +
 449 +       if (dscpmask & dscpstatemask) {
 450 +               fprintf(stderr,
 451 +                       "ctinfo: dscp mask & statemask must NOT overlap\n");
 452 +               return -1;
 453 +       }
 454 +
 455 +       i = ffs(dscpmask);
 456 +       if (i && ((~0 & (dscpmask >> (i - 1))) != 0x3f)) {
 457 +               fprintf(stderr,
 458 +                       "ctinfo: dscp mask must be 6 contiguous bits long\n");
 459 +               return -1;
 460 +       }
 461 +
 462 +       tail = addattr_nest(n, MAX_MSG, tca_id);
 463 +       addattr_l(n, MAX_MSG, TCA_CTINFO_ACT, &sel, sizeof(sel));
 464 +       addattr16(n, MAX_MSG, TCA_CTINFO_ZONE, zone);
 465 +
 466 +       if (dscpmask)
 467 +               addattr32(n, MAX_MSG,
 468 +                         TCA_CTINFO_PARMS_DSCP_MASK, dscpmask);
 469 +
 470 +       if (dscpstatemask)
 471 +               addattr32(n, MAX_MSG,
 472 +                         TCA_CTINFO_PARMS_DSCP_STATEMASK, dscpstatemask);
 473 +
 474 +       if (cpmarkmask)
 475 +               addattr32(n, MAX_MSG,
 476 +                         TCA_CTINFO_PARMS_CPMARK_MASK, cpmarkmask);
 477 +
 478 +       addattr_nest_end(n, tail);
 479 +
 480 +       *argc_p = argc;
 481 +       *argv_p = argv;
 482 +       return 0;
 483 +}
 484 +
 485 +static void print_ctinfo_stats(FILE *f, struct rtattr *tb[TCA_CTINFO_MAX + 1])
 486 +{
 487 +       struct tcf_t *tm;
 488 +
 489 +       if (tb[TCA_CTINFO_TM]) {
 490 +               tm = RTA_DATA(tb[TCA_CTINFO_TM]);
 491 +
 492 +               print_tm(f, tm);
 493 +       }
 494 +
 495 +       if (tb[TCA_CTINFO_STATS_DSCP_SET])
 496 +               print_lluint(PRINT_ANY, "dscpset", " DSCP set %llu",
 497 +                            rta_getattr_u64(tb[TCA_CTINFO_STATS_DSCP_SET]));
 498 +       if (tb[TCA_CTINFO_STATS_DSCP_ERROR])
 499 +               print_lluint(PRINT_ANY, "dscperror", " error %llu",
 500 +                            rta_getattr_u64(tb[TCA_CTINFO_STATS_DSCP_ERROR]));
 501 +
 502 +       if (tb[TCA_CTINFO_STATS_CPMARK_SET])
 503 +               print_lluint(PRINT_ANY, "cpmarkset", " CPMARK set %llu",
 504 +                            rta_getattr_u64(tb[TCA_CTINFO_STATS_CPMARK_SET]));
 505 +}
 506 +
 507 +static int print_ctinfo(struct action_util *au, FILE *f, struct rtattr *arg)
 508 +{
 509 +       unsigned int cpmarkmask = ~0, dscpmask = 0, dscpstatemask = 0;
 510 +       struct rtattr *tb[TCA_CTINFO_MAX + 1];
 511 +       unsigned short zone = 0;
 512 +       struct tc_ctinfo *ci;
 513 +
 514 +       if (arg == NULL)
 515 +               return -1;
 516 +
 517 +       parse_rtattr_nested(tb, TCA_CTINFO_MAX, arg);
 518 +       if (!tb[TCA_CTINFO_ACT]) {
 519 +               print_string(PRINT_FP, NULL, "%s",
 520 +                            "[NULL ctinfo action parameters]");
 521 +               return -1;
 522 +       }
 523 +
 524 +       ci = RTA_DATA(tb[TCA_CTINFO_ACT]);
 525 +
 526 +       if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) {
 527 +               if (RTA_PAYLOAD(tb[TCA_CTINFO_PARMS_DSCP_MASK]) >=
 528 +                   sizeof(__u32))
 529 +                       dscpmask = rta_getattr_u32(
 530 +                                       tb[TCA_CTINFO_PARMS_DSCP_MASK]);
 531 +               else
 532 +                       print_string(PRINT_FP, NULL, "%s",
 533 +                                    "[invalid dscp mask parameter]");
 534 +       }
 535 +
 536 +       if (tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) {
 537 +               if (RTA_PAYLOAD(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) >=
 538 +                   sizeof(__u32))
 539 +                       dscpstatemask = rta_getattr_u32(
 540 +                                       tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]);
 541 +               else
 542 +                       print_string(PRINT_FP, NULL, "%s",
 543 +                                    "[invalid dscp statemask parameter]");
 544 +       }
 545 +
 546 +       if (tb[TCA_CTINFO_PARMS_CPMARK_MASK]) {
 547 +               if (RTA_PAYLOAD(tb[TCA_CTINFO_PARMS_CPMARK_MASK]) >=
 548 +                   sizeof(__u32))
 549 +                       cpmarkmask = rta_getattr_u32(
 550 +                                       tb[TCA_CTINFO_PARMS_CPMARK_MASK]);
 551 +               else
 552 +                       print_string(PRINT_FP, NULL, "%s",
 553 +                                    "[invalid cpmark mask parameter]");
 554 +       }
 555 +
 556 +       if (tb[TCA_CTINFO_ZONE] && RTA_PAYLOAD(tb[TCA_CTINFO_ZONE]) >=
 557 +           sizeof(__u16))
 558 +               zone = rta_getattr_u16(tb[TCA_CTINFO_ZONE]);
 559 +
 560 +       print_string(PRINT_ANY, "kind", "%s ", "ctinfo");
 561 +       print_hu(PRINT_ANY, "zone", "zone %u", zone);
 562 +       print_action_control(f, " ", ci->action, "");
 563 +
 564 +       print_string(PRINT_FP, NULL, "%s", _SL_);
 565 +       print_uint(PRINT_ANY, "index", "\t index %u", ci->index);
 566 +       print_int(PRINT_ANY, "ref", " ref %d", ci->refcnt);
 567 +       print_int(PRINT_ANY, "bind", " bind %d", ci->bindcnt);
 568 +
 569 +       if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) {
 570 +               print_0xhex(PRINT_ANY, "dscpmask", " dscp %#010llx", dscpmask);
 571 +               print_0xhex(PRINT_ANY, "dscpstatemask", " %#010llx",
 572 +                           dscpstatemask);
 573 +       }
 574 +
 575 +       if (tb[TCA_CTINFO_PARMS_CPMARK_MASK])
 576 +               print_0xhex(PRINT_ANY, "cpmark", " cpmark %#010llx",
 577 +                           cpmarkmask);
 578 +
 579 +       if (show_stats)
 580 +               print_ctinfo_stats(f, tb);
 581 +
 582 +       print_string(PRINT_FP, NULL, "%s", _SL_);
 583 +
 584 +       return 0;
 585 +}
 586 +
 587 +struct action_util ctinfo_action_util = {
 588 +       .id = "ctinfo",
 589 +       .parse_aopt = parse_ctinfo,
 590 +       .print_aopt = print_ctinfo,
 591 +};
 592 --
 593 2.20.1 (Apple Git-117)
 594