From patchwork Thu Nov 26 20:39:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karsten Graul X-Patchwork-Id: 11934715 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92841C64E7B for ; Thu, 26 Nov 2020 20:39:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50D7321D91 for ; Thu, 26 Nov 2020 20:39:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="K8Pp7fOL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391129AbgKZUjf (ORCPT ); Thu, 26 Nov 2020 15:39:35 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:33194 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390999AbgKZUjd (ORCPT ); Thu, 26 Nov 2020 15:39:33 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AQKVlEd099294; Thu, 26 Nov 2020 15:39:29 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=EIGQYGTSOafvB23F1hV66+C7jTMwM3PXujQn0TRpT64=; b=K8Pp7fOLSWosrBDDGnQO9lWLgW61YnORXZ4etcQWshBk2EEVuowZoYGV8j2jYnXkTVAZ YLdFA91n7JtZX8cOwOjMtWlbuNR5p1tBLWLMFNmatt2icHBp8ZQ8zEO72dxoigMNJuei LopKbzyf7O1J7cilGRZ365n+LqF3EtsHTCq7lGniALB+3B5Ua3t5pfxP5IKD7ylmWK3M cvsq+yNex5flrue/3T3UP11eS7qaQ7Cw9ZoRMBMAufVtUgM0iOkIpTwueRURUMO9Ha3O R7s3ebTBC+19CC5nYowAMvbubXxbHK1ksn/LdJiGXQI/DWGPIJPdnkp2KCCdkGVKoToz BQ== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 352e4pqx18-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Nov 2020 15:39:29 -0500 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0AQKWeUL012961; Thu, 26 Nov 2020 20:39:28 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma03ams.nl.ibm.com with ESMTP id 34xth8e03d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Nov 2020 20:39:28 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0AQKdPPB2884226 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 26 Nov 2020 20:39:25 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 479D7A4040; Thu, 26 Nov 2020 20:39:25 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 125E6A404D; Thu, 26 Nov 2020 20:39:25 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 26 Nov 2020 20:39:25 +0000 (GMT) From: Karsten Graul To: David Miller , Jakub Kicinski Cc: Heiko Carstens , Stefan Raspl , netdev@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH net-next v6 10/14] net/smc: Introduce SMCR get linkgroup command Date: Thu, 26 Nov 2020 21:39:12 +0100 Message-Id: <20201126203916.56071-11-kgraul@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201126203916.56071-1-kgraul@linux.ibm.com> References: <20201126203916.56071-1-kgraul@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-26_09:2020-11-26,2020-11-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 malwarescore=0 suspectscore=0 bulkscore=0 phishscore=0 adultscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011260124 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Guvenc Gulce Introduce get linkgroup command which loops through all available SMCR linkgroups. It uses the SMC-R linkgroup list as entry point, not the socket list, which makes linkgroup diagnosis possible, in case linkgroup does not contain active connections anymore. Signed-off-by: Guvenc Gulce Signed-off-by: Karsten Graul --- include/uapi/linux/smc.h | 15 +++++++ net/smc/smc_core.c | 85 ++++++++++++++++++++++++++++++++++++++++ net/smc/smc_core.h | 1 + net/smc/smc_netlink.c | 5 +++ 4 files changed, 106 insertions(+) diff --git a/include/uapi/linux/smc.h b/include/uapi/linux/smc.h index 1b8d4e770be9..3ae8ca4e5256 100644 --- a/include/uapi/linux/smc.h +++ b/include/uapi/linux/smc.h @@ -40,12 +40,14 @@ enum { /* SMC PNET Table commands */ /* SMC_GENL_FAMILY commands */ enum { SMC_NETLINK_GET_SYS_INFO = 1, + SMC_NETLINK_GET_LGR_SMCR, }; /* SMC_GENL_FAMILY top level attributes */ enum { SMC_GEN_UNSPEC, SMC_GEN_SYS_INFO, /* nest */ + SMC_GEN_LGR_SMCR, /* nest */ __SMC_GEN_MAX, SMC_GEN_MAX = __SMC_GEN_MAX - 1 }; @@ -62,4 +64,17 @@ enum { SMC_NLA_SYS_MAX = __SMC_NLA_SYS_MAX - 1 }; +/* SMC_GEN_LGR_SMCR attributes */ +enum { + SMC_NLA_LGR_R_UNSPEC, + SMC_NLA_LGR_R_ID, /* u32 */ + SMC_NLA_LGR_R_ROLE, /* u8 */ + SMC_NLA_LGR_R_TYPE, /* u8 */ + SMC_NLA_LGR_R_PNETID, /* string */ + SMC_NLA_LGR_R_VLAN_ID, /* u8 */ + SMC_NLA_LGR_R_CONNS_NUM, /* u32 */ + __SMC_NLA_LGR_R_MAX, + SMC_NLA_LGR_R_MAX = __SMC_NLA_LGR_R_MAX - 1 +}; + #endif /* _UAPI_LINUX_SMC_H */ diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 0524d7bbab67..008ec6e778fa 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -274,6 +274,91 @@ int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb) return skb->len; } +static int smc_nl_fill_lgr(struct smc_link_group *lgr, + struct sk_buff *skb, + struct netlink_callback *cb) +{ + char smc_target[SMC_MAX_PNETID_LEN + 1]; + struct nlattr *attrs; + + attrs = nla_nest_start_noflag(skb, SMC_GEN_LGR_SMCR); + if (!attrs) + goto errout; + + if (nla_put_u32(skb, SMC_NLA_LGR_R_ID, *((u32 *)&lgr->id))) + goto errattr; + if (nla_put_u32(skb, SMC_NLA_LGR_R_CONNS_NUM, lgr->conns_num)) + goto errattr; + if (nla_put_u8(skb, SMC_NLA_LGR_R_ROLE, lgr->role)) + goto errattr; + if (nla_put_u8(skb, SMC_NLA_LGR_R_TYPE, lgr->type)) + goto errattr; + if (nla_put_u8(skb, SMC_NLA_LGR_R_VLAN_ID, lgr->vlan_id)) + goto errattr; + snprintf(smc_target, sizeof(smc_target), "%s", lgr->pnet_id); + if (nla_put_string(skb, SMC_NLA_LGR_R_PNETID, smc_target)) + goto errattr; + + nla_nest_end(skb, attrs); + return 0; +errattr: + nla_nest_cancel(skb, attrs); +errout: + return -EMSGSIZE; +} + +static int smc_nl_handle_lgr(struct smc_link_group *lgr, + struct sk_buff *skb, + struct netlink_callback *cb) +{ + void *nlh; + + nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + &smc_gen_nl_family, NLM_F_MULTI, + SMC_NETLINK_GET_LGR_SMCR); + if (!nlh) + goto errmsg; + if (smc_nl_fill_lgr(lgr, skb, cb)) + goto errout; + + genlmsg_end(skb, nlh); + return 0; + +errout: + genlmsg_cancel(skb, nlh); +errmsg: + return -EMSGSIZE; +} + +static void smc_nl_fill_lgr_list(struct smc_lgr_list *smc_lgr, + struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb); + struct smc_link_group *lgr; + int snum = cb_ctx->pos[0]; + int num = 0; + + spin_lock_bh(&smc_lgr->lock); + list_for_each_entry(lgr, &smc_lgr->list, list) { + if (num < snum) + goto next; + if (smc_nl_handle_lgr(lgr, skb, cb)) + goto errout; +next: + num++; + } +errout: + spin_unlock_bh(&smc_lgr->lock); + cb_ctx->pos[0] = num; +} + +int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb) +{ + smc_nl_fill_lgr_list(&smc_lgr_list, skb, cb); + return skb->len; +} + void smc_lgr_cleanup_early(struct smc_connection *conn) { struct smc_link_group *lgr = conn->lgr; diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index eaed25d4e76b..662315beb605 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -415,6 +415,7 @@ struct smc_link *smc_switch_conns(struct smc_link_group *lgr, void smcr_link_down_cond(struct smc_link *lnk); void smcr_link_down_cond_sched(struct smc_link *lnk); int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb); +int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) { diff --git a/net/smc/smc_netlink.c b/net/smc/smc_netlink.c index b1de58a6a1c4..074b57877fcf 100644 --- a/net/smc/smc_netlink.c +++ b/net/smc/smc_netlink.c @@ -26,6 +26,11 @@ static const struct genl_ops smc_gen_nl_ops[] = { /* can be retrieved by unprivileged users */ .dumpit = smc_nl_get_sys_info, }, + { + .cmd = SMC_NETLINK_GET_LGR_SMCR, + /* can be retrieved by unprivileged users */ + .dumpit = smcr_nl_get_lgr, + }, }; /* SMC_GENL family definition */