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Wed, 06 Dec 2023 21:33:33 -0800 (PST) Date: Thu, 7 Dec 2023 08:33:30 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Lev Pantiukhin Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, mitradir@yandex-team.ru, Lev Pantiukhin , Simon Horman , Julian Anastasov , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, lvs-devel@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org Subject: Re: [PATCH] ipvs: add a stateless type of service and a stateless Maglev hashing scheduler Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231204152020.472247-1-kndrvt@yandex-team.ru> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Wed, 06 Dec 2023 21:33:51 -0800 (PST) Hi Lev, kernel test robot noticed the following build warnings: https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Lev-Pantiukhin/ipvs-add-a-stateless-type-of-service-and-a-stateless-Maglev-hashing-scheduler/20231204-232344 base: https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs-next.git master patch link: https://lore.kernel.org/r/20231204152020.472247-1-kndrvt%40yandex-team.ru patch subject: [PATCH] ipvs: add a stateless type of service and a stateless Maglev hashing scheduler config: i386-randconfig-141-20231207 (https://download.01.org/0day-ci/archive/20231207/202312070849.i9gwwSH0-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce: (https://download.01.org/0day-ci/archive/20231207/202312070849.i9gwwSH0-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202312070849.i9gwwSH0-lkp@intel.com/ New smatch warnings: net/netfilter/ipvs/ip_vs_core.c:545 ip_vs_schedule() error: uninitialized symbol 'need_state'. vim +/need_state +545 net/netfilter/ipvs/ip_vs_core.c ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 440 struct ip_vs_conn * 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 441 ip_vs_schedule(struct ip_vs_service *svc, struct sk_buff *skb, d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 442 struct ip_vs_proto_data *pd, int *ignored, d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 443 struct ip_vs_iphdr *iph) ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 444 { 9330419d9aa4f9 net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2011-01-03 445 struct ip_vs_protocol *pp = pd->pp; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 446 struct ip_vs_conn *cp = NULL; ceec4c38168184 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-03-22 447 struct ip_vs_scheduler *sched; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 448 struct ip_vs_dest *dest; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 449 __be16 _ports[2], *pptr, cport, vport; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 450 const void *caddr, *vaddr; 3575792e005dc9 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-09-17 451 unsigned int flags; b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 452 bool need_state; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 453 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 454 *ignored = 1; 2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 455 /* 2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 456 * IPv6 frags, only the first hit here. 2f74713d1436b7 net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 457 */ 6b3d933000cbe5 net/netfilter/ipvs/ip_vs_core.c Gao Feng 2017-11-13 458 pptr = frag_safe_skb_hp(skb, iph->len, sizeof(_ports), _ports); ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 459 if (pptr == NULL) ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 460 return NULL; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 461 ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 462 if (likely(!ip_vs_iph_inverse(iph))) { ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 463 cport = pptr[0]; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 464 caddr = &iph->saddr; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 465 vport = pptr[1]; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 466 vaddr = &iph->daddr; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 467 } else { ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 468 cport = pptr[1]; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 469 caddr = &iph->daddr; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 470 vport = pptr[0]; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 471 vaddr = &iph->saddr; ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 472 } ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 473 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 474 /* 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 475 * FTPDATA needs this check when using local real server. 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 476 * Never schedule Active FTPDATA connections from real server. 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 477 * For LVS-NAT they must be already created. For other methods 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 478 * with persistence the connection is created on SYN+ACK. 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 479 */ ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 480 if (cport == FTPDATA) { b0e010c527de74 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 481 IP_VS_DBG_PKT(12, svc->af, pp, skb, iph->off, 0d79641a96d612 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 482 "Not scheduling FTPDATA"); 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 483 return NULL; 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 484 } 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 485 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 486 /* a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 487 * Do not schedule replies from local real server. 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 488 */ 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 489 if ((!skb->dev || skb->dev->flags & IFF_LOOPBACK)) { 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 490 iph->hdr_flags ^= IP_VS_HDR_INVERSE; 6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 491 cp = INDIRECT_CALL_1(pp->conn_in_get, 6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 492 ip_vs_conn_in_get_proto, svc->ipvs, 6ecd754883daff net/netfilter/ipvs/ip_vs_core.c Matteo Croce 2019-01-19 493 svc->af, skb, iph); 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 494 iph->hdr_flags ^= IP_VS_HDR_INVERSE; 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 495 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 496 if (cp) { b0e010c527de74 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 497 IP_VS_DBG_PKT(12, svc->af, pp, skb, iph->off, 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 498 "Not scheduling reply for existing" 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 499 " connection"); 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 500 __ip_vs_conn_put(cp); 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 501 return NULL; 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 502 } 802c41adcf3be6 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 503 } 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 504 ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 505 /* ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 506 * Persistent service ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 507 */ a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 508 if (svc->flags & IP_VS_SVC_F_PERSISTENT) ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 509 return ip_vs_sched_persist(svc, skb, cport, vport, ignored, d4383f04d145cc net/netfilter/ipvs/ip_vs_core.c Jesper Dangaard Brouer 2012-09-26 510 iph); a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 511 190ecd27cd7294 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2010-10-17 512 *ignored = 0; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 513 ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 514 /* ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 515 * Non-persistent service ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 516 */ ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 517 if (!svc->fwmark && vport != svc->port) { ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 518 if (!svc->port) 1e3e238e9c4bf9 net/netfilter/ipvs/ip_vs_core.c Hannes Eder 2009-08-02 519 pr_err("Schedule: port zero only supported " ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 520 "in persistent services, " ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 521 "check your ipvs configuration\n"); ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 522 return NULL; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 523 } ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 524 ceec4c38168184 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-03-22 525 sched = rcu_dereference(svc->scheduler); 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 526 if (sched) { 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 527 /* read svc->sched_data after svc->scheduler */ 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 528 smp_rmb(); b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 529 /* we use distinct handler for stateless service */ b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 530 if (svc->flags & IP_VS_SVC_F_STATELESS) b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 531 dest = sched->schedule_sl(svc, skb, iph, &need_state); b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 532 else bba54de5bdd107 net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2013-06-16 533 dest = sched->schedule(svc, skb, iph); need_state not initialized on this path 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 534 } else { 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 535 dest = NULL; 05f00505a89acd net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2015-06-29 536 } ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 537 if (dest == NULL) { ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 538 IP_VS_DBG(1, "Schedule: no dest found.\n"); ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 539 return NULL; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 540 } ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 541 b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 542 /* We use IP_VS_SVC_F_ONEPACKET flag to create no state */ b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 543 flags = ((svc->flags & IP_VS_SVC_F_ONEPACKET && b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 544 iph->protocol == IPPROTO_UDP) || b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 @545 (svc->flags & IP_VS_SVC_F_STATELESS && !need_state)) ^^^^^^^^^^ b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 546 ? IP_VS_CONN_F_ONE_PACKET : 0; 26ec037f9841e4 net/netfilter/ipvs/ip_vs_core.c Nick Chalk 2010-06-22 547 ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 548 /* ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 549 * Create a connection entry. ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 550 */ f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 551 { f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 552 struct ip_vs_conn_param p; 6e67e586e7289c net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2011-01-03 553 3109d2f2d1fe06 net/netfilter/ipvs/ip_vs_core.c Eric W. Biederman 2015-09-21 554 ip_vs_conn_fill_param(svc->ipvs, svc->af, iph->protocol, ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 555 caddr, cport, vaddr, vport, &p); ba38528aae6ee2 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2014-09-09 556 cp = ip_vs_conn_new(&p, dest->af, &dest->addr, ee78378f976488 net/netfilter/ipvs/ip_vs_core.c Alex Gartrell 2015-08-26 557 dest->port ? dest->port : vport, 0e051e683ba4ac net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 558 flags, dest, skb->mark); a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 559 if (!cp) { a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 560 *ignored = -1; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 561 return NULL; f11017ec2d1859 net/netfilter/ipvs/ip_vs_core.c Simon Horman 2010-08-22 562 } a5959d53d6048a net/netfilter/ipvs/ip_vs_core.c Hans Schillstrom 2010-11-19 563 } ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 564 cd17f9ed099ed2 net/ipv4/ipvs/ip_vs_core.c Julius Volz 2008-09-02 565 IP_VS_DBG_BUF(6, "Schedule fwd:%c c:%s:%u v:%s:%u " cd17f9ed099ed2 net/ipv4/ipvs/ip_vs_core.c Julius Volz 2008-09-02 566 "d:%s:%u conn->flags:%X conn->refcnt:%d\n", ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 567 ip_vs_fwd_tag(cp), f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 568 IP_VS_DBG_ADDR(cp->af, &cp->caddr), ntohs(cp->cport), f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 569 IP_VS_DBG_ADDR(cp->af, &cp->vaddr), ntohs(cp->vport), f18ae7206eaebf net/netfilter/ipvs/ip_vs_core.c Julian Anastasov 2014-09-09 570 IP_VS_DBG_ADDR(cp->daf, &cp->daddr), ntohs(cp->dport), b54ab92b84b616 net/netfilter/ipvs/ip_vs_core.c Reshetova, Elena 2017-03-16 571 cp->flags, refcount_read(&cp->refcnt)); ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 572 b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 573 if (!(svc->flags & IP_VS_SVC_F_STATELESS) || b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 574 (svc->flags & IP_VS_SVC_F_STATELESS && need_state)) { ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 575 ip_vs_conn_stats(cp, svc); b276d504bee439 net/netfilter/ipvs/ip_vs_core.c Lev Pantiukhin 2023-12-04 576 } ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 577 return cp; ^1da177e4c3f41 net/ipv4/ipvs/ip_vs_core.c Linus Torvalds 2005-04-16 578 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki