From patchwork Wed May 29 13:28:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 10967111 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DCD4018EC for ; Wed, 29 May 2019 13:29:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CDFB32875A for ; Wed, 29 May 2019 13:29:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CC913288A2; Wed, 29 May 2019 13:29:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 75AC92875A for ; Wed, 29 May 2019 13:29:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727251AbfE2N3V (ORCPT ); Wed, 29 May 2019 09:29:21 -0400 Received: from mx2.suse.de ([195.135.220.15]:45524 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727014AbfE2N3L (ORCPT ); Wed, 29 May 2019 09:29:11 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 48B1EAF4C; Wed, 29 May 2019 13:29:09 +0000 (UTC) From: Hannes Reinecke To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke Subject: [PATCH 07/24] scsi: add host tagset busy iterator Date: Wed, 29 May 2019 15:28:44 +0200 Message-Id: <20190529132901.27645-8-hare@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190529132901.27645-1-hare@suse.de> References: <20190529132901.27645-1-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an iterator scsi_host_tagset_busy_iter() to easily traverse all busy commands. No locking is done here; this need to be ensured by the caller. Signed-off-by: Hannes Reinecke --- drivers/scsi/hosts.c | 27 +++++++++++++++++++++++++++ include/scsi/scsi_host.h | 5 +++++ 2 files changed, 32 insertions(+) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 96ed24841c33..142fdc500bef 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -630,3 +630,30 @@ void scsi_flush_work(struct Scsi_Host *shost) flush_workqueue(shost->work_q); } EXPORT_SYMBOL_GPL(scsi_flush_work); + +struct scsi_host_tagset_busy_iter_data { + scsi_host_busy_iter_fn *fn; + void *priv; +}; + +static bool scsi_host_tagset_busy_iter_fn(struct request *req, void *priv, + bool reserved) +{ + struct scsi_host_tagset_busy_iter_data *iter_data = priv; + struct scsi_cmnd *sc = blk_mq_rq_to_pdu(req); + + return iter_data->fn(sc, iter_data->priv, reserved); +} + +void scsi_host_tagset_busy_iter(struct Scsi_Host *shost, + scsi_host_busy_iter_fn *fn, void *priv) +{ + struct scsi_host_tagset_busy_iter_data iter_data = { + .fn = fn, + .priv = priv, + }; + + blk_mq_tagset_busy_iter(&shost->tag_set, scsi_host_tagset_busy_iter_fn, + &iter_data); +} +EXPORT_SYMBOL_GPL(scsi_host_tagset_busy_iter); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index b094e17ef2d4..89998b6bee04 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -762,6 +762,11 @@ static inline int scsi_host_scan_allowed(struct Scsi_Host *shost) extern void scsi_unblock_requests(struct Scsi_Host *); extern void scsi_block_requests(struct Scsi_Host *); +typedef bool (scsi_host_busy_iter_fn)(struct scsi_cmnd *, void *, bool); + +void scsi_host_tagset_busy_iter(struct Scsi_Host *, + scsi_host_busy_iter_fn *fn, void *priv); + struct class_container; /*