From patchwork Tue Mar 28 14:34:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ye Bin X-Patchwork-Id: 668065 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 1E612C76196 for ; Tue, 28 Mar 2023 14:35:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233108AbjC1Ofo (ORCPT ); Tue, 28 Mar 2023 10:35:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233071AbjC1Of1 (ORCPT ); Tue, 28 Mar 2023 10:35:27 -0400 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2B7AD32A; Tue, 28 Mar 2023 07:35:20 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.169]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4PmBzm2Q7Xz4f3pCZ; Tue, 28 Mar 2023 22:35:16 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.127.227]) by APP3 (Coremail) with SMTP id _Ch0CgDn4R8X+yJkk4bgFg--.7384S7; Tue, 28 Mar 2023 22:35:17 +0800 (CST) From: Ye Bin To: jejb@linux.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ye Bin Subject: [PATCH v2 3/3] scsi: blocking IO when host is set blocked Date: Tue, 28 Mar 2023 22:34:42 +0800 Message-Id: <20230328143442.2684167-4-yebin@huaweicloud.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230328143442.2684167-1-yebin@huaweicloud.com> References: <20230328143442.2684167-1-yebin@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: _Ch0CgDn4R8X+yJkk4bgFg--.7384S7 X-Coremail-Antispam: 1UD129KBjvJXoW7ur1ftw13JFyxZr18Jry7Jrb_yoW8Gry7pF Z0q34jkr48GF4xua98GF15XrySgaykGryDXFyxWwnxXFyUt34jqws8GFyjvFyrJr45Kr4D XF4DtFyYkr18XrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvGb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUWw A2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMc Ij6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_ Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr 0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY 17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcV C0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY 6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa 73UjIFyTuYvjxU7T5lUUUUU X-CM-SenderInfo: p1hex046kxt4xhlfz01xgou0bp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Ye Bin As previous patch introduce 'blocked' sysfs api to set 'host_blockio'. If 'host_blockio' is true will blocking IO. Signed-off-by: Ye Bin --- drivers/scsi/scsi_lib.c | 2 ++ include/scsi/scsi_host.h | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index b7c569a42aa4..20d618300a46 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1724,6 +1724,8 @@ static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx, } ret = BLK_STS_RESOURCE; + if (unlikely(scsi_host_blocked(shost))) + goto out_put_budget; if (!scsi_target_queue_ready(shost, sdev)) goto out_put_budget; if (unlikely(scsi_host_in_recovery(shost))) { diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 3e916dbac1cb..9fc30d0c48de 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -747,6 +747,11 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost) shost->tmf_in_progress; } +static inline int scsi_host_blocked(struct Scsi_Host *shost) +{ + return shost->host_blockio; +} + extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *); extern void scsi_flush_work(struct Scsi_Host *);