From patchwork Thu Oct 6 10:50:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 13000123 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87700C433FE for ; Thu, 6 Oct 2022 10:51:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231344AbiJFKvW (ORCPT ); Thu, 6 Oct 2022 06:51:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231238AbiJFKvQ (ORCPT ); Thu, 6 Oct 2022 06:51:16 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 855B198C81; Thu, 6 Oct 2022 03:51:15 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 6B87041222; Thu, 6 Oct 2022 10:51:11 +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:received; s= mta-01; t=1665053470; x=1666867871; bh=2QTWlWStPcwbY+qgYn3MWziHr of/mUNKm7V1yyvsgfw=; b=anz80Z0EQTjB16Satk+oCWWsntCTNqozrlIui2nJ2 ZCVcNm495BmGchmY5SqxnJZU069Gu5E7bsPjYhOXpCU2cKWrN4SgYDsk4ZBcqRLr Nme/9YUOap2ZU2DPYAHpGgDOgaGbZSJ2CL1iQ+r8HzQ766kOAkf8BOUyuH0gAHkt rk= 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 Aej8xHrkgIBA; Thu, 6 Oct 2022 13:51:10 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (T-EXCH-02.corp.yadro.com [172.17.10.102]) (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 52CDE41223; Thu, 6 Oct 2022 13:51:10 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Thu, 6 Oct 2022 13:51:10 +0300 Received: from NB-591.corp.yadro.com (10.199.18.20) by T-EXCH-08.corp.yadro.com (172.17.11.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1118.9; Thu, 6 Oct 2022 13:51:09 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: Mike Christie , , , Dmitry Bogdanov , Roman Bolshakov Subject: [PATCH v2 5/5] scsi: target: core: Add RTPI attribute for target port Date: Thu, 6 Oct 2022 13:50:57 +0300 Message-ID: <20221006105057.30184-6-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221006105057.30184-1-d.bogdanov@yadro.com> References: <20221006105057.30184-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.18.20] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org RELATIVE TARGET PORT IDENTIFIER can be read and configured via configfs: $ echo 0x10 > $TARGET/tpgt_N/attrib/rtpi RTPI can be changed only on disabled target ports. Signed-off-by: Roman Bolshakov Signed-off-by: Dmitry Bogdanov --- v2: do not allow to change RTPI on enabled target port --- drivers/target/target_core_tpg.c | 53 ++++++++++++++++++++++++++++++- include/target/target_core_base.h | 1 + 2 files changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c index 25ffc3d7a741..09b37ba005ff 100644 --- a/drivers/target/target_core_tpg.c +++ b/drivers/target/target_core_tpg.c @@ -442,8 +442,23 @@ static void core_tpg_lun_ref_release(struct percpu_ref *ref) static int core_tpg_register_rtpi(struct se_portal_group *se_tpg) { - return xa_alloc(&tpg_xa, &se_tpg->tpg_rtpi, se_tpg, + int ret; + + if (se_tpg->rtpi_manual) { + ret = xa_insert(&tpg_xa, se_tpg->tpg_rtpi, se_tpg, GFP_KERNEL); + if (ret) { + pr_info("%s_TPG[%hu] - Can not set RTPI %#x, it is already busy", + se_tpg->se_tpg_tfo->fabric_name, + se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg), + se_tpg->tpg_rtpi); + return -EINVAL; + } + } else { + ret = xa_alloc(&tpg_xa, &se_tpg->tpg_rtpi, se_tpg, XA_LIMIT(1, USHRT_MAX), GFP_KERNEL); + } + + return ret; } static void core_tpg_deregister_rtpi(struct se_portal_group *se_tpg) @@ -682,6 +697,42 @@ void core_tpg_remove_lun( percpu_ref_exit(&lun->lun_ref); } +static ssize_t core_tpg_rtpi_show(struct config_item *item, char *page) +{ + struct se_portal_group *se_tpg = attrib_to_tpg(item); + + return sysfs_emit(page, "%#x\n", se_tpg->tpg_rtpi); +} + +static ssize_t core_tpg_rtpi_store(struct config_item *item, + const char *page, size_t count) +{ + struct se_portal_group *se_tpg = attrib_to_tpg(item); + u16 val; + int ret; + + ret = kstrtou16(page, 0, &val); + if (ret < 0) + return ret; + if (val == 0) + return -EINVAL; + + if (se_tpg->enabled) { + pr_info("%s_TPG[%hu] - Can not change RTPI on enabled TPG", + se_tpg->se_tpg_tfo->fabric_name, + se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg)); + return -EINVAL; + } + + se_tpg->tpg_rtpi = val; + se_tpg->rtpi_manual = true; + + return count; +} + +CONFIGFS_ATTR(core_tpg_, rtpi); + struct configfs_attribute *core_tpg_attrib_attrs[] = { + &core_tpg_attr_rtpi, NULL, }; diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 83b396457ed1..f2375280d6a4 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -901,6 +901,7 @@ struct se_portal_group { bool enabled; /* RELATIVE TARGET PORT IDENTIFIER */ u32 tpg_rtpi; + bool rtpi_manual; /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ atomic_t tpg_pr_ref_count; /* Spinlock for adding/removing ACLed Nodes */