From patchwork Fri Jun 23 06:18:17 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 9805765 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 258666088A for ; Fri, 23 Jun 2017 06:18:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 18553285D1 for ; Fri, 23 Jun 2017 06:18:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C83D286F4; Fri, 23 Jun 2017 06:18:39 +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=-6.9 required=2.0 tests=BAYES_00,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 9AECA286E5 for ; Fri, 23 Jun 2017 06:18:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754448AbdFWGSi (ORCPT ); Fri, 23 Jun 2017 02:18:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55138 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754467AbdFWGSh (ORCPT ); Fri, 23 Jun 2017 02:18:37 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id EF026C06020F; Fri, 23 Jun 2017 06:18:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com EF026C06020F Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=mchristi@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com EF026C06020F Received: from rh2.redhat.com (ovpn-120-27.rdu2.redhat.com [10.10.120.27]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0695017BB1; Fri, 23 Jun 2017 06:18:30 +0000 (UTC) From: Mike Christie To: bart.vanassche@wdc.com, bryantly@linux.vnet.ibm.com, pkalever@redhat.com, target-devel@vger.kernel.org, nab@linux-iscsi.org Cc: Mike Christie Subject: [PATCH 07/10] xcopy: loop over devices using idr helper Date: Fri, 23 Jun 2017 01:18:17 -0500 Message-Id: <1498198700-6325-8-git-send-email-mchristi@redhat.com> In-Reply-To: <1498198700-6325-1-git-send-email-mchristi@redhat.com> References: <1498198700-6325-1-git-send-email-mchristi@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 23 Jun 2017 06:18:32 +0000 (UTC) Sender: target-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This converts the xcopy code to use the idr helper. The next patch will drop the g_device_list and make g_device_mutex local to the target_core_device.c file. Signed-off-by: Mike Christie Reviewed-by: Bart Van Assche --- v3: Fix up printk string formatting. drivers/target/target_core_xcopy.c | 70 ++++++++++++++++++++++---------------- 1 file changed, 41 insertions(+), 29 deletions(-) diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c index 56738a4..9ee89e0 100644 --- a/drivers/target/target_core_xcopy.c +++ b/drivers/target/target_core_xcopy.c @@ -55,48 +55,60 @@ static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) return 0; } -static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn, - struct se_device **found_dev) +struct xcopy_dev_search_info { + const unsigned char *dev_wwn; + struct se_device *found_dev; +}; + +static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, + void *data) { - struct se_device *se_dev; + struct xcopy_dev_search_info *info = data; unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; int rc; - mutex_lock(&g_device_mutex); - list_for_each_entry(se_dev, &g_device_list, g_dev_node) { + if (!se_dev->dev_attrib.emulate_3pc) + return 0; - if (!se_dev->dev_attrib.emulate_3pc) - continue; + memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); + target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); - memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); - target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); + rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); + if (rc != 0) + return 0; - rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); - if (rc != 0) - continue; + info->found_dev = se_dev; + pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); - *found_dev = se_dev; - pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); + rc = target_depend_item(&se_dev->dev_group.cg_item); + if (rc != 0) { + pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n", + rc, se_dev); + return rc; + } - rc = target_depend_item(&se_dev->dev_group.cg_item); - if (rc != 0) { - pr_err("configfs_depend_item attempt failed:" - " %d for se_dev: %p\n", rc, se_dev); - mutex_unlock(&g_device_mutex); - return rc; - } + pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n", + se_dev, &se_dev->dev_group); + return 1; +} + +static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn, + struct se_device **found_dev) +{ + struct xcopy_dev_search_info info; + int ret; - pr_debug("Called configfs_depend_item for se_dev: %p" - " se_dev->se_dev_group: %p\n", se_dev, - &se_dev->dev_group); + memset(&info, 0, sizeof(info)); + info.dev_wwn = dev_wwn; - mutex_unlock(&g_device_mutex); + ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info); + if (ret == 1) { + *found_dev = info.found_dev; return 0; + } else { + pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); + return -EINVAL; } - mutex_unlock(&g_device_mutex); - - pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); - return -EINVAL; } static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop,