From patchwork Tue Sep 6 10:34:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 603725 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 B0ACFC6FA96 for ; Tue, 6 Sep 2022 10:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239697AbiIFKr0 (ORCPT ); Tue, 6 Sep 2022 06:47:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239838AbiIFKqe (ORCPT ); Tue, 6 Sep 2022 06:46:34 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CBB57C199; Tue, 6 Sep 2022 03:45:27 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 8A0A25657B; Tue, 6 Sep 2022 10:45:15 +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=1662461113; x=1664275514; bh=Iu8xowrnP3iP6weKdChSttsa1 NjdGhwaxwjCiL3aTGE=; b=iUrAUH95bFPCCJmvL1VSJ3L3xOBDViK0Ou1VtXlZR bxJM42F/j49lUzeHA5OSYRgX/MJIrwiSP918el94Ik5mLL2RZ4XCuo4eS2wWXo5O 43vlLe/biT9QY1KxPZnfn0liTJ0U0ADYIkcPl/VL26rsftYr3M0piW905DPkcU42 F0= 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 dK9AZ7jCRYwZ; Tue, 6 Sep 2022 13:45:13 +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 A0C9256592; Tue, 6 Sep 2022 13:34:44 +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; Tue, 6 Sep 2022 13:34:44 +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; Tue, 6 Sep 2022 13:34:41 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: Mike Christie , , , Dmitry Bogdanov , Roman Bolshakov Subject: [PATCH v2 3/6] scsi: target: core: dynamic opcode support in RSOC Date: Tue, 6 Sep 2022 13:34:18 +0300 Message-ID: <20220906103421.22348-4-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220906103421.22348-1-d.bogdanov@yadro.com> References: <20220906103421.22348-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.18.20] X-ClientProxiedBy: T-EXCH-02.corp.yadro.com (172.17.10.102) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Report supported opcodes depending on a dynamic device configuration. Reviewed-by: Roman Bolshakov Signed-off-by: Dmitry Bogdanov --- v2: fix tcm_is_ws_enabled fix sparse warnings remove extra space --- drivers/target/target_core_spc.c | 120 ++++++++++++++++++++++++++++-- include/target/target_core_base.h | 1 + 2 files changed, 116 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 043c08abf338..93adf9594b1a 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1399,6 +1399,15 @@ static struct target_opcode_descriptor tcm_opcode_write_verify16 = { 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, }; +static bool tcm_is_ws_enabled(struct se_cmd *cmd) +{ + struct sbc_ops *ops = cmd->protocol_data; + struct se_device *dev = cmd->se_dev; + + return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) || + !!ops->execute_write_same; +} + static struct target_opcode_descriptor tcm_opcode_write_same32 = { .support = SCSI_SUPPORT_FULL, .serv_action_valid = 1, @@ -1413,8 +1422,16 @@ static struct target_opcode_descriptor tcm_opcode_write_same32 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff}, + .enabled = tcm_is_ws_enabled, }; +static bool tcm_is_caw_enabled(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_caw; +} + static struct target_opcode_descriptor tcm_opcode_compare_write = { .support = SCSI_SUPPORT_FULL, .opcode = COMPARE_AND_WRITE, @@ -1423,6 +1440,7 @@ static struct target_opcode_descriptor tcm_opcode_compare_write = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .enabled = tcm_is_caw_enabled, }; static struct target_opcode_descriptor tcm_opcode_read_capacity = { @@ -1446,6 +1464,20 @@ static struct target_opcode_descriptor tcm_opcode_read_capacity16 = { 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, }; +static bool tcm_is_rep_ref_enabled(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + spin_lock(&dev->t10_alua.lba_map_lock); + if (list_empty(&dev->t10_alua.lba_map_list)) { + spin_unlock(&dev->t10_alua.lba_map_lock); + return false; + } + spin_unlock(&dev->t10_alua.lba_map_lock); + return true; + +} + static struct target_opcode_descriptor tcm_opcode_read_report_refferals = { .support = SCSI_SUPPORT_FULL, .serv_action_valid = 1, @@ -1456,6 +1488,7 @@ static struct target_opcode_descriptor tcm_opcode_read_report_refferals = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_rep_ref_enabled, }; static struct target_opcode_descriptor tcm_opcode_sync_cache = { @@ -1477,6 +1510,14 @@ static struct target_opcode_descriptor tcm_opcode_sync_cache16 = { 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, }; +static bool tcm_is_unmap_enabled(struct se_cmd *cmd) +{ + struct sbc_ops *ops = cmd->protocol_data; + struct se_device *dev = cmd->se_dev; + + return ops->execute_unmap && dev->dev_attrib.emulate_tpu; +} + static struct target_opcode_descriptor tcm_opcode_unmap = { .support = SCSI_SUPPORT_FULL, .opcode = UNMAP, @@ -1484,6 +1525,7 @@ static struct target_opcode_descriptor tcm_opcode_unmap = { .usage_bits = {UNMAP, 0x00, 0x00, 0x00, 0x00, 0x00, SCSI_GROUP_NUMBER_MASK, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_unmap_enabled, }; static struct target_opcode_descriptor tcm_opcode_write_same = { @@ -1493,6 +1535,7 @@ static struct target_opcode_descriptor tcm_opcode_write_same = { .usage_bits = {WRITE_SAME, 0xe8, 0xff, 0xff, 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_ws_enabled, }; static struct target_opcode_descriptor tcm_opcode_write_same16 = { @@ -1503,6 +1546,7 @@ static struct target_opcode_descriptor tcm_opcode_write_same16 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, + .enabled = tcm_is_ws_enabled, }; static struct target_opcode_descriptor tcm_opcode_verify = { @@ -1588,6 +1632,13 @@ static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = { 0xff, SCSI_CONTROL_MASK}, }; +static bool tcm_is_pr_enabled(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_pr; +} + static struct target_opcode_descriptor tcm_opcode_pri_read_caps = { .support = SCSI_SUPPORT_FULL, .serv_action_valid = 1, @@ -1597,6 +1648,7 @@ static struct target_opcode_descriptor tcm_opcode_pri_read_caps = { .usage_bits = {PERSISTENT_RESERVE_IN, PRI_REPORT_CAPABILITIES, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = { @@ -1608,6 +1660,7 @@ static struct target_opcode_descriptor tcm_opcode_pri_read_full_status = { .usage_bits = {PERSISTENT_RESERVE_IN, PRI_READ_FULL_STATUS, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_register = { @@ -1619,6 +1672,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_register = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_reserve = { @@ -1630,6 +1684,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_reserve = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RESERVE, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_release = { @@ -1641,6 +1696,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_release = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_RELEASE, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_clear = { @@ -1652,6 +1708,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_clear = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_CLEAR, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_preempt = { @@ -1663,6 +1720,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_preempt = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = { @@ -1674,6 +1732,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_preempt_abort = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_PREEMPT_AND_ABORT, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = { @@ -1687,6 +1746,7 @@ static struct target_opcode_descriptor tcm_opcode_pro_reg_ign_exist = { 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_pro_register_move = { @@ -1698,14 +1758,23 @@ static struct target_opcode_descriptor tcm_opcode_pro_register_move = { .usage_bits = {PERSISTENT_RESERVE_OUT, PRO_REGISTER_AND_MOVE, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_pr_enabled, }; +static bool tcm_is_scsi2_reservations_enabled(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_pr; +} + static struct target_opcode_descriptor tcm_opcode_release = { .support = SCSI_SUPPORT_FULL, .opcode = RELEASE, .cdb_size = 6, .usage_bits = {RELEASE, 0x00, 0x00, 0x00, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_scsi2_reservations_enabled, }; static struct target_opcode_descriptor tcm_opcode_release10 = { @@ -1715,6 +1784,7 @@ static struct target_opcode_descriptor tcm_opcode_release10 = { .usage_bits = {RELEASE_10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_scsi2_reservations_enabled, }; static struct target_opcode_descriptor tcm_opcode_reserve = { @@ -1723,6 +1793,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve = { .cdb_size = 6, .usage_bits = {RESERVE, 0x00, 0x00, 0x00, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_scsi2_reservations_enabled, }; static struct target_opcode_descriptor tcm_opcode_reserve10 = { @@ -1732,6 +1803,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve10 = { .usage_bits = {RESERVE_10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, + .enabled = tcm_is_scsi2_reservations_enabled, }; static struct target_opcode_descriptor tcm_opcode_request_sense = { @@ -1750,6 +1822,13 @@ static struct target_opcode_descriptor tcm_opcode_inquiry = { 0xff, SCSI_CONTROL_MASK}, }; +static bool tcm_is_3pc_enabled(struct se_cmd *cmd) +{ + struct se_device *dev = cmd->se_dev; + + return dev->dev_attrib.emulate_3pc; +} + static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = { .support = SCSI_SUPPORT_FULL, .serv_action_valid = 1, @@ -1759,6 +1838,7 @@ static struct target_opcode_descriptor tcm_opcode_extended_copy_lid1 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_3pc_enabled, }; static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = { @@ -1772,6 +1852,7 @@ static struct target_opcode_descriptor tcm_opcode_rcv_copy_res_op_params = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_3pc_enabled, }; static struct target_opcode_descriptor tcm_opcode_report_luns = { @@ -1814,6 +1895,26 @@ static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = { 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, }; +static bool tcm_is_set_tpg_enabled(struct se_cmd *cmd) +{ + struct t10_alua_tg_pt_gp *l_tg_pt_gp; + struct se_lun *l_lun = cmd->se_lun; + + rcu_read_lock(); + l_tg_pt_gp = rcu_dereference(l_lun->lun_tg_pt_gp); + if (!l_tg_pt_gp) { + rcu_read_unlock(); + return false; + } + if (!(l_tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA)) { + rcu_read_unlock(); + return false; + } + rcu_read_unlock(); + + return true; +} + static struct target_opcode_descriptor tcm_opcode_set_tpg = { .support = SCSI_SUPPORT_FULL, .serv_action_valid = 1, @@ -1823,6 +1924,7 @@ static struct target_opcode_descriptor tcm_opcode_set_tpg = { .usage_bits = {MAINTENANCE_OUT, MO_SET_TARGET_PGS, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, + .enabled = tcm_is_set_tpg_enabled, }; static struct target_opcode_descriptor *tcm_supported_opcodes[] = { @@ -1976,7 +2078,9 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) */ if (descr->serv_action_valid) return TCM_INVALID_CDB_FIELD; - *opcode = descr; + + if (!descr->enabled || descr->enabled(cmd)) + *opcode = descr; break; case 0x2: /* @@ -1988,9 +2092,10 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) * and the additional sense code set to INVALID FIELD IN CDB. */ if (descr->serv_action_valid && - descr->service_action == requested_sa) - *opcode = descr; - else if (!descr->serv_action_valid) + descr->service_action == requested_sa) { + if (!descr->enabled || descr->enabled(cmd)) + *opcode = descr; + } else if (!descr->serv_action_valid) return TCM_INVALID_CDB_FIELD; break; case 0x3: @@ -2001,10 +2106,12 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) * be returned in the one_command parameter data format. */ if (descr->service_action == requested_sa) - *opcode = descr; + if (!descr->enabled || descr->enabled(cmd)) + *opcode = descr; break; } } + return 0; } @@ -2053,6 +2160,9 @@ spc_emulate_report_supp_op_codes(struct se_cmd *cmd) for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { descr = tcm_supported_opcodes[i]; + if (descr->enabled && !descr->enabled(cmd)) + continue; + response_length += spc_rsoc_encode_command_descriptor( &buf[response_length], rctd, descr); } diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index d93c65bcbc11..329f88680367 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -876,6 +876,7 @@ struct target_opcode_descriptor { u8 specific_timeout; u16 nominal_timeout; u16 recommended_timeout; + bool (*enabled)(struct se_cmd *cmd); u8 usage_bits[]; };