From patchwork Fri Jul 1 07:26:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 595462 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 9E2A5C19F2C for ; Wed, 3 Aug 2022 16:30:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238115AbiHCQaK (ORCPT ); Wed, 3 Aug 2022 12:30:10 -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 S238222AbiHCQ3p (ORCPT ); Wed, 3 Aug 2022 12:29:45 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A312946DBF; Wed, 3 Aug 2022 09:29:43 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 4202441319; Wed, 3 Aug 2022 16:29:42 +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=1659544180; x=1661358581; bh=wgioVz2EmvpJGetHzuYpI2nLZ hLhNwegLTtp00ImE8k=; b=JFGJdBIEf2zphq/PbZf4/hX0pypFdufuv4aa3uzgF eYAtrkVOGkFGSVGizDxbGmDTw9CMc3TTvFFuBwmTviFocs/qOtuG88juIejwG0Vm vKKDvksT3exGye6x/GFhV0gBtjCGCbZTo8BcjfyNPpirzNzPft5waezRllQ6tPN6 Ok= 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 PD38rZ6KE3fa; Wed, 3 Aug 2022 19:29:40 +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 D92EF41284; Wed, 3 Aug 2022 19:29:20 +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; Wed, 3 Aug 2022 19:29:20 +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 19:29:20 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Dmitry Bogdanov Subject: [RFC PATCH 30/48] target: core: rethink APTPL registrations Date: Fri, 1 Jul 2022 10:26:25 +0300 Message-ID: <20220803162857.27770-31-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 Make APTPL registrations be real registrations from the very beginning. Just mark at deve creation that it has a PR registration if it exists. Signed-off-by: Dmitry Bogdanov --- drivers/target/target_core_pr.c | 104 +++++++++++++------------------- 1 file changed, 43 insertions(+), 61 deletions(-) diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index d177db3024c9..a984987f0a82 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -832,6 +832,28 @@ static struct t10_pr_registration *__core_scsi3_alloc_registration( return NULL; } +static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, + struct t10_pr_registration *, enum register_type, int); + +static void core_scsi3_aptpl_reserve( + struct se_device *dev, + const char *initiatorname, + struct t10_pr_registration *pr_reg) +{ + char i_buf[PR_REG_ISID_ID_LEN] = { }; + + core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); + + spin_lock(&dev->dev_reservation_lock); + dev->dev_pr_res_holder = pr_reg; + spin_unlock(&dev->dev_reservation_lock); + + pr_debug("SPC-3 PR Service Action: APTPL RESERVE created new reservation holder TYPE: %s ALL_TG_PT: %d\n", + core_scsi3_pr_dump_type(pr_reg->pr_res_type), + (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); + pr_debug("SPC-3 PR RESERVE Node: %s%s\n", initiatorname, i_buf); +} + int core_scsi3_alloc_aptpl_registration( struct t10_reservation *pr_tmpl, u64 sa_res_key, @@ -845,6 +867,7 @@ int core_scsi3_alloc_aptpl_registration( u8 type, u8 proto_id) { + struct se_device *dev = container_of(pr_tmpl, struct se_device, t10_pr); struct t10_pr_registration *pr_reg; if (!i_port || !sa_res_key) { @@ -888,47 +911,24 @@ int core_scsi3_alloc_aptpl_registration( */ snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port); target_gen_pr_transport_id(pr_reg, proto_id, i_port, isid); + + pr_reg->pr_res_holder = res_holder; + __core_scsi3_add_registration(dev, NULL, pr_reg, REGISTER, 0); + + if (pr_reg->pr_res_holder) + core_scsi3_aptpl_reserve(dev, i_port, pr_reg); + /* - * Set pr_res_holder from caller, the pr_reg who is the reservation - * holder will get it's pointer set in core_scsi3_aptpl_reserve() once - * the Initiator Node LUN ACL from the fabric module is created for - * this registration. + * Reenable pr_aptpl_active to accept new metadata + * updates once the SCSI device is active again.. */ - pr_reg->pr_res_holder = res_holder; + pr_tmpl->pr_aptpl_active = 1; - list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list); pr_debug("SPC-3 PR APTPL Successfully added registration%s from" " metadata\n", (res_holder) ? "+reservation" : ""); return 0; } -static void core_scsi3_aptpl_reserve( - struct se_device *dev, - struct se_portal_group *tpg, - struct se_node_acl *node_acl, - struct t10_pr_registration *pr_reg) -{ - char i_buf[PR_REG_ISID_ID_LEN] = { }; - - core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); - - spin_lock(&dev->dev_reservation_lock); - dev->dev_pr_res_holder = pr_reg; - spin_unlock(&dev->dev_reservation_lock); - - pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created" - " new reservation holder TYPE: %s ALL_TG_PT: %d\n", - tpg->se_tpg_tfo->fabric_name, - core_scsi3_pr_dump_type(pr_reg->pr_res_type), - (pr_reg->pr_reg_all_tg_pt) ? 1 : 0); - pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n", - tpg->se_tpg_tfo->fabric_name, node_acl->initiatorname, - i_buf); -} - -static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *, - struct t10_pr_registration *, enum register_type, int); - static int __core_scsi3_check_aptpl_registration( struct se_device *dev, struct se_portal_group *tpg, @@ -946,12 +946,13 @@ static int __core_scsi3_check_aptpl_registration( * may exist for fabrics that use ISIDs in their SCSI Initiator Port * TransportIDs. */ - spin_lock(&pr_tmpl->aptpl_reg_lock); - list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list, - pr_reg_aptpl_list) { + spin_lock(&pr_tmpl->registration_lock); + list_for_each_entry_safe(pr_reg, pr_reg_tmp, + &pr_tmpl->registration_list, pr_reg_list) { - if (!strcmp(pr_reg->pr_iport, nacl->initiatorname) && - (pr_reg->tg_pt_sep_rtpi == tpg->tpg_rtpi)) { + if (pr_reg->pr_reg_nacl == NULL && + !strcmp(pr_reg->pr_iport, nacl->initiatorname) && + (pr_reg->tg_pt_sep_rtpi == tpg->tpg_rtpi)) { /* * Obtain the ->pr_reg_deve pointer + reference, that * is released by __core_scsi3_add_registration() below. @@ -964,34 +965,15 @@ static int __core_scsi3_check_aptpl_registration( rcu_read_unlock(); continue; } - kref_get(&pr_reg->pr_reg_deve->pr_kref); + set_bit(DEF_PR_REG_ACTIVE, &pr_reg->pr_reg_deve->deve_flags); + pr_reg->pr_reg_deve = NULL; rcu_read_unlock(); pr_reg->pr_reg_nacl = nacl; - pr_reg->tg_pt_sep_rtpi = lun->lun_tpg->tpg_rtpi; - list_del(&pr_reg->pr_reg_aptpl_list); - spin_unlock(&pr_tmpl->aptpl_reg_lock); - /* - * At this point all of the pointers in *pr_reg will - * be setup, so go ahead and add the registration. - */ - __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0); - /* - * If this registration is the reservation holder, - * make that happen now.. - */ - if (pr_reg->pr_res_holder) - core_scsi3_aptpl_reserve(dev, tpg, - nacl, pr_reg); - /* - * Reenable pr_aptpl_active to accept new metadata - * updates once the SCSI device is active again.. - */ - spin_lock(&pr_tmpl->aptpl_reg_lock); - pr_tmpl->pr_aptpl_active = 1; + pr_reg->pr_res_mapped_lun = mapped_lun; } } - spin_unlock(&pr_tmpl->aptpl_reg_lock); + spin_unlock(&pr_tmpl->registration_lock); return 0; }