From patchwork Thu Aug 17 13:20:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guangguan Wang X-Patchwork-Id: 13356470 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 99E2514AB4 for ; Thu, 17 Aug 2023 13:20:47 +0000 (UTC) Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF6F71FF3; Thu, 17 Aug 2023 06:20:43 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R731e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=guangguan.wang@linux.alibaba.com;NM=1;PH=DS;RN=14;SR=0;TI=SMTPD_---0Vq.3QPw_1692278438; Received: from localhost.localdomain(mailfrom:guangguan.wang@linux.alibaba.com fp:SMTPD_---0Vq.3QPw_1692278438) by smtp.aliyun-inc.com; Thu, 17 Aug 2023 21:20:38 +0800 From: Guangguan Wang To: wenjia@linux.ibm.com, jaka@linux.ibm.com, kgraul@linux.ibm.com, tonylu@linux.alibaba.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: horms@kernel.org, alibuda@linux.alibaba.com, guwen@linux.alibaba.com, linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 3/6] net/smc: support smc v2.x features validate Date: Thu, 17 Aug 2023 21:20:29 +0800 Message-Id: <20230817132032.23397-4-guangguan.wang@linux.alibaba.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230817132032.23397-1-guangguan.wang@linux.alibaba.com> References: <20230817132032.23397-1-guangguan.wang@linux.alibaba.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Support SMC v2.x features validate for SMC v2.1. This is the frame code for SMC v2.x features validate, and will take effects only when the negotiated release version is v2.1 or later. For Server, v2.x features' validation should be done in smc_clc_srv_ v2x_features_validate when receiving v2.1 or later CLC Proposal Message, such as max conns, max links negotiation, the decision of the final value of max conns and max links should be made in this function. And final check for server when receiving v2.1 or later CLC Confirm Message should be done in smc_clc_v2x_features_confirm_check. For client, v2.x features' validation should be done in smc_clc_clnt_ v2x_features_validate when receiving v2.1 or later CLC Accept Message, for example, the decision to accpt the accepted value or to decline should be made in this function. Signed-off-by: Guangguan Wang Reviewed-by: Tony Lu Reviewed-by: Jan Karcher --- net/smc/af_smc.c | 18 ++++++++++++++++++ net/smc/smc_clc.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ net/smc/smc_clc.h | 7 +++++++ 3 files changed, 71 insertions(+) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 10bec585983f..9174dedd9b3b 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -1168,6 +1168,7 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc, (struct smc_clc_msg_accept_confirm_v2 *)aclc; struct smc_clc_first_contact_ext *fce = smc_get_clc_first_contact_ext(clc_v2, false); + int rc; if (!ini->first_contact_peer || aclc->hdr.version == SMC_V1) return 0; @@ -1188,6 +1189,9 @@ static int smc_connect_rdma_v2_prepare(struct smc_sock *smc, } ini->release_nr = fce->release; + rc = smc_clc_clnt_v2x_features_validate(fce, ini); + if (rc) + return rc; return 0; } @@ -1362,6 +1366,9 @@ static int smc_connect_ism(struct smc_sock *smc, smc_get_clc_first_contact_ext(aclc_v2, true); ini->release_nr = fce->release; + rc = smc_clc_clnt_v2x_features_validate(fce, ini); + if (rc) + return rc; } rc = smc_v2_determine_accepted_chid(aclc_v2, ini); @@ -2412,6 +2419,10 @@ static void smc_listen_work(struct work_struct *work) if (rc) goto out_decl; + rc = smc_clc_srv_v2x_features_validate(pclc, ini); + if (rc) + goto out_decl; + mutex_lock(&smc_server_lgr_pending); smc_close_init(new_smc); smc_rx_init(new_smc); @@ -2444,6 +2455,13 @@ static void smc_listen_work(struct work_struct *work) goto out_decl; } + rc = smc_clc_v2x_features_confirm_check(cclc, ini); + if (rc) { + if (!ini->is_smcd) + goto out_unlock; + goto out_decl; + } + /* finish worker */ if (!ini->is_smcd) { rc = smc_listen_rdma_finish(new_smc, cclc, diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 728f88616266..d3c892ee7177 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -1158,6 +1158,52 @@ int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact, return len > 0 ? 0 : len; } +int smc_clc_srv_v2x_features_validate(struct smc_clc_msg_proposal *pclc, + struct smc_init_info *ini) +{ + struct smc_clc_v2_extension *pclc_v2_ext; + + if ((!(ini->smcd_version & SMC_V2) && !(ini->smcr_version & SMC_V2)) || + ini->release_nr < SMC_RELEASE_1) + return 0; + + pclc_v2_ext = smc_get_clc_v2_ext(pclc); + if (!pclc_v2_ext) + return SMC_CLC_DECL_NOV2EXT; + + return 0; +} + +int smc_clc_clnt_v2x_features_validate(struct smc_clc_first_contact_ext *fce, + struct smc_init_info *ini) +{ + if (ini->release_nr < SMC_RELEASE_1) + return 0; + + return 0; +} + +int smc_clc_v2x_features_confirm_check(struct smc_clc_msg_accept_confirm *cclc, + struct smc_init_info *ini) +{ + struct smc_clc_msg_accept_confirm_v2 *clc_v2 = + (struct smc_clc_msg_accept_confirm_v2 *)cclc; + struct smc_clc_first_contact_ext *fce = + smc_get_clc_first_contact_ext(clc_v2, ini->is_smcd); + + if (cclc->hdr.version == SMC_V1 || + !(cclc->hdr.typev2 & SMC_FIRST_CONTACT_MASK)) + return 0; + + if (ini->release_nr != fce->release) + return SMC_CLC_DECL_RELEASEERR; + + if (fce->release < SMC_RELEASE_1) + return 0; + + return 0; +} + void smc_clc_get_hostname(u8 **host) { *host = &smc_hostname[0]; diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h index bd75382f374d..552d0656252c 100644 --- a/net/smc/smc_clc.h +++ b/net/smc/smc_clc.h @@ -45,6 +45,7 @@ #define SMC_CLC_DECL_NOSEID 0x03030006 /* peer sent no SEID */ #define SMC_CLC_DECL_NOSMCD2DEV 0x03030007 /* no SMC-Dv2 device found */ #define SMC_CLC_DECL_NOUEID 0x03030008 /* peer sent no UEID */ +#define SMC_CLC_DECL_RELEASEERR 0x03030009 /* release version negotiate failed */ #define SMC_CLC_DECL_MODEUNSUPP 0x03040000 /* smc modes do not match (R or D)*/ #define SMC_CLC_DECL_RMBE_EC 0x03050000 /* peer has eyecatcher in RMBE */ #define SMC_CLC_DECL_OPTUNSUPP 0x03060000 /* fastopen sockopt not supported */ @@ -415,6 +416,12 @@ int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact, u8 version, u8 *eid, struct smc_init_info *ini); int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact, u8 version, u8 *negotiated_eid, struct smc_init_info *ini); +int smc_clc_srv_v2x_features_validate(struct smc_clc_msg_proposal *pclc, + struct smc_init_info *ini); +int smc_clc_clnt_v2x_features_validate(struct smc_clc_first_contact_ext *fce, + struct smc_init_info *ini); +int smc_clc_v2x_features_confirm_check(struct smc_clc_msg_accept_confirm *cclc, + struct smc_init_info *ini); void smc_clc_init(void) __init; void smc_clc_exit(void); void smc_clc_get_hostname(u8 **host);