From patchwork Tue Feb 21 16:06:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 655940 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 25283C64ED6 for ; Tue, 21 Feb 2023 16:06:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233836AbjBUQGk (ORCPT ); Tue, 21 Feb 2023 11:06:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233659AbjBUQGj (ORCPT ); Tue, 21 Feb 2023 11:06:39 -0500 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 061F92B288; Tue, 21 Feb 2023 08:06:37 -0800 (PST) Received: from mta-01.yadro.com (localhost.localdomain [127.0.0.1]) by mta-01.yadro.com (Proxmox) with ESMTP id 1B55E342031; Tue, 21 Feb 2023 19:06:35 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yadro.com; h=cc :cc:content-transfer-encoding:content-type:content-type:date :from:from:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=mta-01; bh=ofCmB0LA+TgBas53ua 9VwKa+Nu1ZBpccy+1UTM5kUbc=; b=DZf5dlFnSy2kUBr5ldcxcKksUZ9+JAGKl+ h/5HzEKmnqka7fIz193ypXiaTToGkUBm31D4Q4vrDxnt1BW9fdU8gJw5g5TQGWrH V/B2v8VdVfdbZrqKi07vZxwh9njaggOTo5A79gG8Isfwdgx/sarKEiExoZWL/4hH 2EuKItw60= Received: from T-EXCH-08.corp.yadro.com (unknown [172.17.10.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Proxmox) with ESMTPS id 119ED342024; Tue, 21 Feb 2023 19:06:35 +0300 (MSK) Received: from NB-591.corp.yadro.com (10.178.114.42) 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; Tue, 21 Feb 2023 19:06:34 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: Christoph Hellwig , Mike Christie , , , Dmitry Bogdanov Subject: [PATCH v4 1/4] scsi: target: core: Add RTPI field to target port Date: Tue, 21 Feb 2023 19:06:19 +0300 Message-ID: <20230221160622.7283-2-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230221160622.7283-1-d.bogdanov@yadro.com> References: <20230221160622.7283-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.178.114.42] 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 SAM-5 4.6.5.2 (Relative Port Identifier attribute) defines the attribute as unique across SCSI target ports. The change introduces RTPI attribute to se_portal group. The value is unique across all enabled SCSI target ports. It also limits number of SCSI target ports to 65535. Signed-off-by: Dmitry Bogdanov --- v4: use unused variable in target_tpg_disable make tpg_rtpi variable u16 again v3: make variable static change core_ prefix to target_ split to tpg_enable/tpg_disable functions v2: rewrite using XArray to track usage of RTPI --- drivers/target/target_core_fabric_configfs.c | 9 ++-- drivers/target/target_core_internal.h | 2 + drivers/target/target_core_tpg.c | 54 ++++++++++++++++++++ include/target/target_core_base.h | 2 + 4 files changed, 62 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index 67b18a67317a..873da49ab704 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -836,13 +836,12 @@ static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item, if (se_tpg->enabled == op) return count; - - ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, op); + if (op) + ret = target_tpg_enable(se_tpg); + else + ret = target_tpg_disable(se_tpg); if (ret) return ret; - - se_tpg->enabled = op; - return count; } diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 38a6d08f75b3..82fd5768a662 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -132,6 +132,8 @@ void core_tpg_remove_lun(struct se_portal_group *, struct se_lun *); struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *tpg, const char *initiatorname); void core_tpg_del_initiator_node_acl(struct se_node_acl *acl); +int target_tpg_enable(struct se_portal_group *se_tpg); +int target_tpg_disable(struct se_portal_group *se_tpg); /* target_core_transport.c */ int init_se_kmem_caches(void); diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c index 736847c933e5..0de3385b94c5 100644 --- a/drivers/target/target_core_tpg.c +++ b/drivers/target/target_core_tpg.c @@ -31,6 +31,7 @@ #include "target_core_ua.h" extern struct se_device *g_lun0_dev; +static DEFINE_XARRAY_ALLOC(tpg_xa); /* __core_tpg_get_initiator_node_acl(): * @@ -439,6 +440,57 @@ static void core_tpg_lun_ref_release(struct percpu_ref *ref) complete(&lun->lun_shutdown_comp); } +static int target_tpg_register_rtpi(struct se_portal_group *se_tpg) +{ + u32 val; + int ret; + + ret = xa_alloc(&tpg_xa, &val, se_tpg, + XA_LIMIT(1, USHRT_MAX), GFP_KERNEL); + if (!ret) + se_tpg->tpg_rtpi = val; + + return ret; +} + +static void target_tpg_deregister_rtpi(struct se_portal_group *se_tpg) +{ + if (se_tpg->tpg_rtpi && se_tpg->enabled) + xa_erase(&tpg_xa, se_tpg->tpg_rtpi); +} + +int target_tpg_enable(struct se_portal_group *se_tpg) +{ + int ret; + + ret = target_tpg_register_rtpi(se_tpg); + if (ret) + return ret; + + ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, true); + if (ret) { + target_tpg_deregister_rtpi(se_tpg); + return ret; + } + + se_tpg->enabled = true; + + return 0; +} + +int target_tpg_disable(struct se_portal_group *se_tpg) +{ + int ret; + + target_tpg_deregister_rtpi(se_tpg); + + ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, false); + if (!ret) + se_tpg->enabled = false; + + return ret; +} + /* Does not change se_wwn->priv. */ int core_tpg_register( struct se_wwn *se_wwn, @@ -535,6 +587,8 @@ int core_tpg_deregister(struct se_portal_group *se_tpg) kfree_rcu(se_tpg->tpg_virt_lun0, rcu_head); } + target_tpg_deregister_rtpi(se_tpg); + return 0; } EXPORT_SYMBOL(core_tpg_deregister); diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 12c9ba16217e..814edf746395 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -920,6 +920,8 @@ struct se_portal_group { */ int proto_id; bool enabled; + /* RELATIVE TARGET PORT IDENTIFIER */ + u16 tpg_rtpi; /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ atomic_t tpg_pr_ref_count; /* Spinlock for adding/removing ACLed Nodes */