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Date: Thu, 6 May 2021 05:47:53 +0800
From: kernel test robot <lkp@...el.com>
To: Toms Atteka <cpp.code.lv@...il.com>, netdev@...r.kernel.org
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
Toms Atteka <cpp.code.lv@...il.com>
Subject: Re: [PATCH] net-next: openvswitch: IPv6: Add IPv6 extension header
support
Hi Toms,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on net/master]
[also build test WARNING on ipsec/master ipvs/master net-next/master linus/master v5.12 next-20210505]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Toms-Atteka/net-next-openvswitch-IPv6-Add-IPv6-extension-header-support/20210506-021045
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 4c7a94286ef7ac7301d633f17519fb1bb89d7550
config: x86_64-randconfig-a012-20210505 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/ef546bf606b0f17bf7ce250cd4e619528369a8ec
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Toms-Atteka/net-next-openvswitch-IPv6-Add-IPv6-extension-header-support/20210506-021045
git checkout ef546bf606b0f17bf7ce250cd4e619528369a8ec
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> net/openvswitch/flow.c:268:6: warning: no previous prototype for function 'get_ipv6_ext_hdrs' [-Wmissing-prototypes]
void get_ipv6_ext_hdrs(struct sk_buff *skb, struct ipv6hdr *nh, u16 *ext_hdrs)
^
net/openvswitch/flow.c:268:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void get_ipv6_ext_hdrs(struct sk_buff *skb, struct ipv6hdr *nh, u16 *ext_hdrs)
^
static
1 warning generated.
vim +/get_ipv6_ext_hdrs +268 net/openvswitch/flow.c
241
242 /**
243 * Parses packet and sets IPv6 extension header flags.
244 *
245 * skb buffer where extension header data starts in packet
246 * nh ipv6 header
247 * ext_hdrs flags are stored here
248 *
249 * OFPIEH12_UNREP is set if more than one of a given IPv6 extension header
250 * is unexpectedly encountered. (Two destination options headers may be
251 * expected and would not cause this bit to be set.)
252 *
253 * OFPIEH12_UNSEQ is set if IPv6 extension headers were not in the order
254 * preferred (but not required) by RFC 2460:
255 *
256 * When more than one extension header is used in the same packet, it is
257 * recommended that those headers appear in the following order:
258 * IPv6 header
259 * Hop-by-Hop Options header
260 * Destination Options header
261 * Routing header
262 * Fragment header
263 * Authentication header
264 * Encapsulating Security Payload header
265 * Destination Options header
266 * upper-layer header
267 */
> 268 void get_ipv6_ext_hdrs(struct sk_buff *skb, struct ipv6hdr *nh, u16 *ext_hdrs)
269 {
270 int next_type = nh->nexthdr;
271 unsigned int start = skb_network_offset(skb) + sizeof(struct ipv6hdr);
272 int dest_options_header_count = 0;
273
274 *ext_hdrs = 0;
275
276 while (ipv6_ext_hdr(next_type)) {
277 struct ipv6_opt_hdr _hdr, *hp;
278
279 switch (next_type) {
280 case IPPROTO_NONE:
281 *ext_hdrs |= OFPIEH12_NONEXT;
282 /* stop parsing */
283 return;
284
285 case IPPROTO_ESP:
286 if (*ext_hdrs & OFPIEH12_ESP)
287 *ext_hdrs |= OFPIEH12_UNREP;
288 if ((*ext_hdrs & ~(OFPIEH12_HOP |
289 OFPIEH12_DEST |
290 OFPIEH12_ROUTER |
291 IPPROTO_FRAGMENT |
292 OFPIEH12_AUTH |
293 OFPIEH12_UNREP)) ||
294 dest_options_header_count >= 2)
295 *ext_hdrs |= OFPIEH12_UNSEQ;
296 *ext_hdrs |= OFPIEH12_ESP;
297 break;
298
299 case IPPROTO_AH:
300 if (*ext_hdrs & OFPIEH12_AUTH)
301 *ext_hdrs |= OFPIEH12_UNREP;
302 if ((*ext_hdrs & ~(OFPIEH12_HOP |
303 OFPIEH12_DEST |
304 OFPIEH12_ROUTER |
305 IPPROTO_FRAGMENT |
306 OFPIEH12_UNREP)) ||
307 dest_options_header_count >= 2)
308 *ext_hdrs |= OFPIEH12_UNSEQ;
309 *ext_hdrs |= OFPIEH12_AUTH;
310 break;
311
312 case IPPROTO_DSTOPTS:
313 if (dest_options_header_count == 0) {
314 if (*ext_hdrs & ~(OFPIEH12_HOP |
315 OFPIEH12_UNREP))
316 *ext_hdrs |= OFPIEH12_UNSEQ;
317 *ext_hdrs |= OFPIEH12_DEST;
318 } else if (dest_options_header_count == 1) {
319 if (*ext_hdrs & ~(OFPIEH12_HOP |
320 OFPIEH12_DEST |
321 OFPIEH12_ROUTER |
322 OFPIEH12_FRAG |
323 OFPIEH12_AUTH |
324 OFPIEH12_ESP |
325 OFPIEH12_UNREP))
326 *ext_hdrs |= OFPIEH12_UNSEQ;
327 } else {
328 *ext_hdrs |= OFPIEH12_UNREP;
329 }
330 dest_options_header_count++;
331 break;
332
333 case IPPROTO_FRAGMENT:
334 if (*ext_hdrs & OFPIEH12_FRAG)
335 *ext_hdrs |= OFPIEH12_UNREP;
336 if ((*ext_hdrs & ~(OFPIEH12_HOP |
337 OFPIEH12_DEST |
338 OFPIEH12_ROUTER |
339 OFPIEH12_UNREP)) ||
340 dest_options_header_count >= 2)
341 *ext_hdrs |= OFPIEH12_UNSEQ;
342 *ext_hdrs |= OFPIEH12_FRAG;
343 break;
344
345 case IPPROTO_ROUTING:
346 if (*ext_hdrs & OFPIEH12_ROUTER)
347 *ext_hdrs |= OFPIEH12_UNREP;
348 if ((*ext_hdrs & ~(OFPIEH12_HOP |
349 OFPIEH12_DEST |
350 OFPIEH12_UNREP)) ||
351 dest_options_header_count >= 2)
352 *ext_hdrs |= OFPIEH12_UNSEQ;
353 *ext_hdrs |= OFPIEH12_ROUTER;
354 break;
355
356 case IPPROTO_HOPOPTS:
357 if (*ext_hdrs & OFPIEH12_HOP)
358 *ext_hdrs |= OFPIEH12_UNREP;
359 /* OFPIEH12_HOP is set to 1 if a hop-by-hop IPv6
360 * extension header is present as the first extension
361 * header in the pac ket.
362 */
363 if (*ext_hdrs == 0)
364 *ext_hdrs |= OFPIEH12_HOP;
365 else
366 *ext_hdrs |= OFPIEH12_UNSEQ;
367 break;
368
369 default:
370 return;
371 }
372
373 hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr);
374 if (!hp)
375 break;
376 next_type = hp->nexthdr;
377 start += ipv6_optlen(hp);
378 };
379 }
380
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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