From patchwork Thu Feb 25 12:18:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 595471 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 77941C19F2C for ; Wed, 3 Aug 2022 16:29:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236097AbiHCQ3j (ORCPT ); Wed, 3 Aug 2022 12:29:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238261AbiHCQ3X (ORCPT ); Wed, 3 Aug 2022 12:29:23 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5407541D32; Wed, 3 Aug 2022 09:29:20 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id B9E44412DD; Wed, 3 Aug 2022 16:29:18 +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=1659544157; x=1661358558; bh=F8zwbwFQerInqTJkM47gn2DFi lWIUw9B3wyqG8xTPDM=; b=HES+aTLitYbxxoXdsh206sV6bg2cjkXlOoFQO0ZA8 lrmBe0LOAk1/d53IgC9VCJtHNqe6c1h61GMCF0fOA2wSpR0zVLAyXRE/whdkfFKO pht+TL+aNLp9YX3t5Koi0F5T+2dwEcZqAr0967V4bqpLicAO5oAm/OyBaJfyFnDu SM= 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 L-f30nbTlgaw; Wed, 3 Aug 2022 19:29:17 +0300 (MSK) Received: from T-EXCH-01.corp.yadro.com (t-exch-01.corp.yadro.com [172.17.10.101]) (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 E625341239; Wed, 3 Aug 2022 19:29:13 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-01.corp.yadro.com (172.17.10.101) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Wed, 3 Aug 2022 19:29:14 +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; Wed, 3 Aug 2022 19:29:12 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Dmitry Bogdanov Subject: [RFC PATCH 09/48] target: core: check RTPI uniquity for enabled TPG Date: Thu, 25 Feb 2021 15:18:00 +0300 Message-ID: <20220803162857.27770-10-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220803162857.27770-1-d.bogdanov@yadro.com> References: <20220803162857.27770-1-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 Garantee uniquity of RTPI only for enabled target port groups. Allow any RPTI for disabled tpg until it is enabled. Signed-off-by: Dmitry Bogdanov --- drivers/target/target_core_fabric_configfs.c | 29 +++++++++++++- drivers/target/target_core_internal.h | 2 + drivers/target/target_core_tpg.c | 40 +++++++++++++------- 3 files changed, 56 insertions(+), 15 deletions(-) diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index a34b5db4eec5..fc1b8f54fb54 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -857,6 +857,7 @@ static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item, size_t count) { struct se_portal_group *se_tpg = to_tpg(item); + struct se_portal_group *tpg; int ret; bool op; @@ -867,11 +868,37 @@ static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item, if (se_tpg->enabled == op) return count; + spin_lock(&g_tpg_lock); + + if (op) { + tpg = core_get_tpg_by_rtpi(se_tpg->tpg_rtpi); + if (tpg) { + spin_unlock(&g_tpg_lock); + + pr_err("TARGET_CORE[%s]->TPG[%u] - RTPI %#x conflicts with TARGET_CORE[%s]->TPG[%u]\n", + se_tpg->se_tpg_tfo->fabric_name, + se_tpg->se_tpg_tfo->tpg_get_tag(tpg), + se_tpg->tpg_rtpi, + tpg->se_tpg_tfo->fabric_name, + tpg->se_tpg_tfo->tpg_get_tag(tpg)); + return -EINVAL; + } + } + + se_tpg->enabled |= 0x10; /* transient state */ + spin_unlock(&g_tpg_lock); + ret = se_tpg->se_tpg_tfo->fabric_enable_tpg(se_tpg, op); - if (ret) + + spin_lock(&g_tpg_lock); + if (ret < 0) { + se_tpg->enabled &= ~0x10; /* clear transient state */ + spin_unlock(&g_tpg_lock); return ret; + } se_tpg->enabled = op; + spin_unlock(&g_tpg_lock); return count; } diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index d662cdc9a04c..d4ace697edb0 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -116,6 +116,7 @@ int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *, struct list_head *, struct se_cmd *); /* target_core_tpg.c */ +extern struct spinlock g_tpg_lock; extern struct se_device *g_lun0_dev; extern struct configfs_attribute *core_tpg_attrib_attrs[]; @@ -131,6 +132,7 @@ 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); +struct se_portal_group *core_get_tpg_by_rtpi(u16 rtpi); /* target_core_transport.c */ extern struct kmem_cache *se_tmr_req_cache; diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c index a409cf1c4ca0..5a81d592530f 100644 --- a/drivers/target/target_core_tpg.c +++ b/drivers/target/target_core_tpg.c @@ -34,7 +34,7 @@ extern struct se_device *g_lun0_dev; static u16 g_tpg_count; static u16 g_tpg_rtpi_counter = 1; static LIST_HEAD(g_tpg_list); -static DEFINE_SPINLOCK(g_tpg_lock); +DEFINE_SPINLOCK(g_tpg_lock); /* __core_tpg_get_initiator_node_acl(): * @@ -476,7 +476,7 @@ static int core_tpg_register_rtpi(struct se_portal_group *se_tpg) * Make sure RELATIVE TARGET PORT IDENTIFIER is unique * for 16-bit wrap.. */ - if (se_tpg->tpg_rtpi == tpg->tpg_rtpi) + if (tpg->enabled && se_tpg->tpg_rtpi == tpg->tpg_rtpi) goto again; } list_add(&se_tpg->tpg_list, &g_tpg_list); @@ -738,12 +738,26 @@ static ssize_t core_tpg_rtpi_show(struct config_item *item, char *page) return sprintf(page, "%#x\n", se_tpg->tpg_rtpi); } +struct se_portal_group * +core_get_tpg_by_rtpi(u16 rtpi) +{ + struct se_portal_group *tpg; + + lockdep_assert_held(&g_tpg_lock); + + list_for_each_entry(tpg, &g_tpg_list, tpg_list) { + if (tpg->enabled && rtpi == tpg->tpg_rtpi) + return tpg; + } + + return NULL; +} + 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); struct se_portal_group *tpg; - bool rtpi_changed = false; u16 val; int ret; @@ -753,11 +767,14 @@ static ssize_t core_tpg_rtpi_store(struct config_item *item, if (val == 0) return -EINVAL; - /* RTPI shouldn't conflict with values of existing ports */ + if (se_tpg->tpg_rtpi == val) + return count; + spin_lock(&g_tpg_lock); - list_for_each_entry(tpg, &g_tpg_list, tpg_list) { - if (se_tpg != tpg && val == tpg->tpg_rtpi) { + if (se_tpg->enabled) { + tpg = core_get_tpg_by_rtpi(val); + if (tpg) { spin_unlock(&g_tpg_lock); pr_err("TARGET_CORE[%s]->TPG[%u] - RTPI %#x conflicts with TARGET_CORE[%s]->TPG[%u]\n", se_tpg->se_tpg_tfo->fabric_name, @@ -769,17 +786,12 @@ static ssize_t core_tpg_rtpi_store(struct config_item *item, } } - if (se_tpg->tpg_rtpi != val) { - se_tpg->tpg_rtpi = val; - rtpi_changed = true; - } + se_tpg->tpg_rtpi = val; spin_unlock(&g_tpg_lock); - if (rtpi_changed) - core_tpg_ua(se_tpg, 0x3f, ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); - ret = count; + core_tpg_ua(se_tpg, 0x3f, ASCQ_3FH_INQUIRY_DATA_HAS_CHANGED); - return ret; + return count; } CONFIGFS_ATTR(core_tpg_, rtpi);