From patchwork Thu Nov 26 20:39:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karsten Graul X-Patchwork-Id: 334075 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=-16.8 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, 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 BCF40C64E90 for ; Thu, 26 Nov 2020 20:39:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 367FE21D93 for ; Thu, 26 Nov 2020 20:39:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="tS0oQXea" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391169AbgKZUjf (ORCPT ); Thu, 26 Nov 2020 15:39:35 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:18756 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390965AbgKZUjc (ORCPT ); Thu, 26 Nov 2020 15:39:32 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0AQKWVkc122749; Thu, 26 Nov 2020 15:39:30 -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=mTkf04wf8uU4Wk+OgqRPMggEFvKp7nZ7PnGY5mHwmmY=; b=tS0oQXeatLYbbrJS/N2Gcfsp/v3jAa9EzGUshqetCNqm6bdwMhnjmUljd0dIOH4QHikf kKkc5B6a6qceA0SeqUjns8GGjljolRjxrkn/9veTtJqY3RBi7bnPOxu+hzghY8RSlStG VJaHyuu1i/rUXtna7AYcrqWaB7LXPNY3VmQMtjebQMsfNUMR3vA16bU/4PDzvz60ml7M ay9Coy4jFR6CK8nCfykwNsaHz+r0XpjQ8g3bH6OQf5HY3C5cwAT66iz06x2SZgyfOdSz bcXFyQZc77gjXPaltBilTX1k+aS1W7Bp+BTx5DskEJsnW9jUs1h8hkTAeHzWJnVOp1Kn cg== Received: from ppma05fra.de.ibm.com (6c.4a.5195.ip4.static.sl-reverse.com [149.81.74.108]) by mx0a-001b2d01.pphosted.com with ESMTP id 352hnajarp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 26 Nov 2020 15:39:30 -0500 Received: from pps.filterd (ppma05fra.de.ibm.com [127.0.0.1]) by ppma05fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0AQKX3Qk015048; 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 ppma05fra.de.ibm.com with ESMTP id 352ata088d-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 0AQKdPRl66191842 (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 07974A4040; 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 C648DA4057; Thu, 26 Nov 2020 20:39:24 +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 20:39:24 +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 09/14] net/smc: Add support for obtaining system information Date: Thu, 26 Nov 2020 21:39:11 +0100 Message-Id: <20201126203916.56071-10-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 suspectscore=2 phishscore=0 adultscore=0 spamscore=0 bulkscore=0 mlxscore=0 priorityscore=1501 clxscore=1015 mlxlogscore=999 impostorscore=0 malwarescore=0 lowpriorityscore=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 From: Guvenc Gulce Add new netlink command to obtain system information of the smc module. Signed-off-by: Guvenc Gulce Signed-off-by: Karsten Graul --- include/uapi/linux/smc.h | 18 ++++++++++++ net/smc/smc_clc.c | 5 ++++ net/smc/smc_clc.h | 1 + net/smc/smc_core.c | 60 ++++++++++++++++++++++++++++++++++++++++ net/smc/smc_core.h | 2 ++ net/smc/smc_netlink.c | 5 ++++ net/smc/smc_netlink.h | 9 ++++++ 7 files changed, 100 insertions(+) diff --git a/include/uapi/linux/smc.h b/include/uapi/linux/smc.h index b604d64542e8..1b8d4e770be9 100644 --- a/include/uapi/linux/smc.h +++ b/include/uapi/linux/smc.h @@ -37,11 +37,29 @@ enum { /* SMC PNET Table commands */ #define SMC_GENL_FAMILY_NAME "SMC_GEN_NETLINK" #define SMC_GENL_FAMILY_VERSION 1 +/* SMC_GENL_FAMILY commands */ +enum { + SMC_NETLINK_GET_SYS_INFO = 1, +}; + /* SMC_GENL_FAMILY top level attributes */ enum { SMC_GEN_UNSPEC, + SMC_GEN_SYS_INFO, /* nest */ __SMC_GEN_MAX, SMC_GEN_MAX = __SMC_GEN_MAX - 1 }; +/* SMC_GEN_SYS_INFO attributes */ +enum { + SMC_NLA_SYS_UNSPEC, + SMC_NLA_SYS_VER, /* u8 */ + SMC_NLA_SYS_REL, /* u8 */ + SMC_NLA_SYS_IS_ISM_V2, /* u8 */ + SMC_NLA_SYS_LOCAL_HOST, /* string */ + SMC_NLA_SYS_SEID, /* string */ + __SMC_NLA_SYS_MAX, + SMC_NLA_SYS_MAX = __SMC_NLA_SYS_MAX - 1 +}; + #endif /* _UAPI_LINUX_SMC_H */ diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 696d89c2dce4..e286dafd6e88 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -772,6 +772,11 @@ int smc_clc_send_accept(struct smc_sock *new_smc, bool srv_first_contact, return len > 0 ? 0 : len; } +void smc_clc_get_hostname(u8 **host) +{ + *host = &smc_hostname[0]; +} + void __init smc_clc_init(void) { struct new_utsname *u; diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h index 49752c997c51..32d37f7b70f2 100644 --- a/net/smc/smc_clc.h +++ b/net/smc/smc_clc.h @@ -334,5 +334,6 @@ int smc_clc_send_confirm(struct smc_sock *smc, bool clnt_first_contact, int smc_clc_send_accept(struct smc_sock *smc, bool srv_first_contact, u8 version); void smc_clc_init(void) __init; +void smc_clc_get_hostname(u8 **host); #endif diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 0088511e30bf..0524d7bbab67 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -16,6 +16,8 @@ #include #include #include +#include +#include #include #include #include @@ -30,6 +32,7 @@ #include "smc_cdc.h" #include "smc_close.h" #include "smc_ism.h" +#include "smc_netlink.h" #define SMC_LGR_NUM_INCR 256 #define SMC_LGR_FREE_DELAY_SERV (600 * HZ) @@ -214,6 +217,63 @@ static void smc_lgr_unregister_conn(struct smc_connection *conn) conn->lgr = NULL; } +int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb); + char hostname[SMC_MAX_HOSTNAME_LEN + 1]; + char smc_seid[SMC_MAX_EID_LEN + 1]; + struct smcd_dev *smcd_dev; + struct nlattr *attrs; + u8 *seid = NULL; + u8 *host = NULL; + 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_SYS_INFO); + if (!nlh) + goto errmsg; + if (cb_ctx->pos[0]) + goto errout; + attrs = nla_nest_start_noflag(skb, SMC_GEN_SYS_INFO); + if (!attrs) + goto errout; + if (nla_put_u8(skb, SMC_NLA_SYS_VER, SMC_V2)) + goto errattr; + if (nla_put_u8(skb, SMC_NLA_SYS_REL, SMC_RELEASE)) + goto errattr; + if (nla_put_u8(skb, SMC_NLA_SYS_IS_ISM_V2, smc_ism_is_v2_capable())) + goto errattr; + smc_clc_get_hostname(&host); + if (host) { + snprintf(hostname, sizeof(hostname), "%s", host); + if (nla_put_string(skb, SMC_NLA_SYS_LOCAL_HOST, hostname)) + goto errattr; + } + mutex_lock(&smcd_dev_list.mutex); + smcd_dev = list_first_entry_or_null(&smcd_dev_list.list, + struct smcd_dev, list); + if (smcd_dev) + smc_ism_get_system_eid(smcd_dev, &seid); + mutex_unlock(&smcd_dev_list.mutex); + if (seid && smc_ism_is_v2_capable()) { + snprintf(smc_seid, sizeof(smc_seid), "%s", seid); + if (nla_put_string(skb, SMC_NLA_SYS_SEID, smc_seid)) + goto errattr; + } + nla_nest_end(skb, attrs); + genlmsg_end(skb, nlh); + cb_ctx->pos[0] = 1; + return skb->len; + +errattr: + nla_nest_cancel(skb, attrs); +errout: + genlmsg_cancel(skb, nlh); +errmsg: + 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 3a1bb8e4b81f..eaed25d4e76b 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -14,6 +14,7 @@ #include #include +#include #include "smc.h" #include "smc_ib.h" @@ -413,6 +414,7 @@ struct smc_link *smc_switch_conns(struct smc_link_group *lgr, struct smc_link *from_lnk, bool is_dev_err); 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); 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 e9a56148e71b..b1de58a6a1c4 100644 --- a/net/smc/smc_netlink.c +++ b/net/smc/smc_netlink.c @@ -21,6 +21,11 @@ /* SMC_GENL generic netlink operation definition */ static const struct genl_ops smc_gen_nl_ops[] = { + { + .cmd = SMC_NETLINK_GET_SYS_INFO, + /* can be retrieved by unprivileged users */ + .dumpit = smc_nl_get_sys_info, + }, }; /* SMC_GENL family definition */ diff --git a/net/smc/smc_netlink.h b/net/smc/smc_netlink.h index 0c757232c0d0..3477265cba6c 100644 --- a/net/smc/smc_netlink.h +++ b/net/smc/smc_netlink.h @@ -17,6 +17,15 @@ extern struct genl_family smc_gen_nl_family; +struct smc_nl_dmp_ctx { + int pos[2]; +}; + +static inline struct smc_nl_dmp_ctx *smc_nl_dmp_ctx(struct netlink_callback *c) +{ + return (struct smc_nl_dmp_ctx *)c->ctx; +} + int smc_nl_init(void) __init; void smc_nl_exit(void);