From patchwork Mon Mar 22 08:05:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 12154047 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 653D0C433C1 for ; Mon, 22 Mar 2021 08:07:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D7E061585 for ; Mon, 22 Mar 2021 08:07:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229548AbhCVIG2 (ORCPT ); Mon, 22 Mar 2021 04:06:28 -0400 Received: from mta-02.yadro.com ([89.207.88.252]:39538 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229746AbhCVIGN (ORCPT ); Mon, 22 Mar 2021 04:06:13 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 5DA7A412D6; Mon, 22 Mar 2021 08:06:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1616400371; x=1618214772; bh=uz0+aRISZVgXIhknBdtnI75wTsyR70tf6nh vSeNez+8=; b=DBt3f8TZJW6z/nHVEicd4o/QLKKtstibQVgsEx+b0EuowSrp24G 1mssdQ1nrF7aOG/glpAReThoaQzt/F2s6f/DoB9fSPyjAgpT6xx3drudLMAnoaHi lBRuKzRs6fSFuuQ96xuOUroaK5yOXIHDYvWm2600d6HgFS2ThjjAGIx4= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8-iKT1IzzyCV; Mon, 22 Mar 2021 11:06:11 +0300 (MSK) Received: from T-EXCH-03.corp.yadro.com (t-exch-03.corp.yadro.com [172.17.100.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id E282841241; Mon, 22 Mar 2021 11:06:09 +0300 (MSK) Received: from NB-591.corp.yadro.com (10.199.0.33) by T-EXCH-03.corp.yadro.com (172.17.100.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 22 Mar 2021 11:06:08 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Nilesh Javali , Chris Boot , Bart Van Assche , Michael Cyr , Felipe Balbi , Dmitry Bogdanov , Roman Bolshakov Subject: [PATCH v2 1/7] target: core: add common tpg/enable attribute Date: Mon, 22 Mar 2021 11:05:48 +0300 Message-ID: <20210322080554.7611-2-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210322080554.7611-1-d.bogdanov@yadro.com> References: <20210322080554.7611-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.0.33] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-03.corp.yadro.com (172.17.100.103) Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org Many fabric modules provide their own implementation of enable attribute in tpg. The change provides a way to remove code duplication in the fabric modules and automatically add "enable" attribute if a fabric module has an implementation of fabric_enable_tpg() ops. Reviewed-by: Roman Bolshakov Signed-off-by: Dmitry Bogdanov --- v2: create enable atribute only for modules with enable_tpg ops drivers/target/target_core_configfs.c | 1 + drivers/target/target_core_fabric_configfs.c | 40 ++++++++++++++++++- drivers/target/target_core_internal.h | 1 + drivers/target/target_core_tpg.c | 41 ++++++++++++++++++++ include/target/target_core_base.h | 1 + include/target/target_core_fabric.h | 1 + 6 files changed, 83 insertions(+), 2 deletions(-) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index f04352285155..fc3949e91f9c 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -490,6 +490,7 @@ void target_unregister_template(const struct target_core_fabric_ops *fo) * fabric driver unload of TFO->module to proceed. */ rcu_barrier(); + kfree(t->tf_tpg_base_cit.ct_attrs); kfree(t); return; } diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index ee85602213f7..c5e1b0d54330 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -815,8 +815,40 @@ static struct configfs_item_operations target_fabric_tpg_base_item_ops = { .release = target_fabric_tpg_release, }; -TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL); +static int +target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf) +{ + int i, k, len = 0; + struct config_item_type *cit = &tf->tf_tpg_base_cit; + struct configfs_attribute **attrs; + + if (tf->tf_ops->fabric_enable_tpg) + for (i = 0; core_tpg_base_enable_attrs[i]; i++) + len += sizeof(struct configfs_attribute *); + if (tf->tf_ops->tfc_tpg_base_attrs) + for (i = 0; tf->tf_ops->tfc_tpg_base_attrs[i]; i++) + len += sizeof(struct configfs_attribute *); + len += sizeof(struct configfs_attribute *); + + attrs = kzalloc(len, GFP_KERNEL); + if (!attrs) + return -ENOMEM; + + if (tf->tf_ops->fabric_enable_tpg) + for (i = 0; core_tpg_base_enable_attrs[i]; i++) + attrs[i] = core_tpg_base_enable_attrs[i]; + if (tf->tf_ops->tfc_tpg_base_attrs) + for (k = 0; tf->tf_ops->tfc_tpg_base_attrs[k]; k++, i++) + attrs[i] = tf->tf_ops->tfc_tpg_base_attrs[k]; + attrs[i] = NULL; + + cit->ct_item_ops = &target_fabric_tpg_base_item_ops; + cit->ct_attrs = attrs; + cit->ct_owner = tf->tf_ops->module; + pr_debug("Setup generic tpg_base\n"); + return 0; +} /* End of tfc_tpg_base_cit */ /* Start of tfc_tpg_cit */ @@ -971,11 +1003,15 @@ TF_CIT_SETUP_DRV(discovery, NULL, NULL); int target_fabric_setup_cits(struct target_fabric_configfs *tf) { + int ret; + target_fabric_setup_discovery_cit(tf); target_fabric_setup_wwn_cit(tf); target_fabric_setup_wwn_fabric_stats_cit(tf); target_fabric_setup_tpg_cit(tf); - target_fabric_setup_tpg_base_cit(tf); + ret = target_fabric_setup_tpg_base_cit(tf); + if (ret) + return ret; target_fabric_setup_tpg_port_cit(tf); target_fabric_setup_tpg_port_stat_cit(tf); target_fabric_setup_tpg_lun_cit(tf); diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index e7b3c6e5d574..274fd670bf9c 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -117,6 +117,7 @@ int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *, /* target_core_tpg.c */ extern struct se_device *g_lun0_dev; +extern struct configfs_attribute *core_tpg_base_enable_attrs[]; struct se_node_acl *__core_tpg_get_initiator_node_acl(struct se_portal_group *tpg, const char *); diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c index 736847c933e5..d06b3fbd8511 100644 --- a/drivers/target/target_core_tpg.c +++ b/drivers/target/target_core_tpg.c @@ -650,3 +650,44 @@ void core_tpg_remove_lun( percpu_ref_exit(&lun->lun_ref); } + + +static ssize_t core_tpg_base_enable_show(struct config_item *item, char *page) +{ + return sysfs_emit(page, "%d\n", to_tpg(item)->enabled); +} + +static ssize_t core_tpg_base_enable_store(struct config_item *item, + const char *page, size_t count) +{ + struct se_portal_group *se_tpg = to_tpg(item); + int ret; + u32 op; + + ret = kstrtou32(page, 0, &op); + if (ret) + return ret; + if ((op != 1) && (op != 0)) { + pr_err("Illegal value for tpg_enable: %u\n", op); + return -EINVAL; + } + + if (se_tpg->enabled == op) + return count; + + ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, op); + + if (ret) + return ret; + + se_tpg->enabled = op; + + return count; +} + +CONFIGFS_ATTR(core_tpg_base_, enable); + +struct configfs_attribute *core_tpg_base_enable_attrs[] = { + &core_tpg_base_attr_enable, + NULL, +}; diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 54dcc0eb25fa..fabc9dccfeb2 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -885,6 +885,7 @@ struct se_portal_group { * Negative values can be used by fabric drivers for internal use TPGs. */ int proto_id; + bool enabled; /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ atomic_t tpg_pr_ref_count; /* Spinlock for adding/removing ACLed Nodes */ diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h index d60a3eb7517a..b7e409e9e13e 100644 --- a/include/target/target_core_fabric.h +++ b/include/target/target_core_fabric.h @@ -89,6 +89,7 @@ struct target_core_fabric_ops { void (*add_wwn_groups)(struct se_wwn *); struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *, const char *); + int (*fabric_enable_tpg)(struct se_portal_group *se_tpg, bool enable); void (*fabric_drop_tpg)(struct se_portal_group *); int (*fabric_post_link)(struct se_portal_group *, struct se_lun *);