From patchwork Fri Jun 15 18:23:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Lingshan X-Patchwork-Id: 10467235 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 0B54960532 for ; Fri, 15 Jun 2018 18:24:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EFDF928E3B for ; Fri, 15 Jun 2018 18:24:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E481028E40; Fri, 15 Jun 2018 18:24:25 +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 955F928E42 for ; Fri, 15 Jun 2018 18:24:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756409AbeFOSYT (ORCPT ); Fri, 15 Jun 2018 14:24:19 -0400 Received: from smtp2.provo.novell.com ([137.65.250.81]:38625 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756369AbeFOSYQ (ORCPT ); Fri, 15 Jun 2018 14:24:16 -0400 Received: from vstart.localdomain (prv-ext-foundry1int.gns.novell.com [137.65.251.240]) by smtp2.provo.novell.com with ESMTP (TLS encrypted); Fri, 15 Jun 2018 12:24:10 -0600 From: Zhu Lingshan To: target-devel@vger.kernel.org, linux-scsi@vger.kernel.org, nab@linux-iscsi.org, mchristi@redhat.com, martin.petersen@oracle.com Cc: hare@suse.de, lduncan@suse.com, ddiss@suse.de, lszhu@suse.de, Zhu Lingshan Subject: [PATCH 03/33] TCMU PR: add functions can get PR info from a dev Date: Sat, 16 Jun 2018 02:23:12 +0800 Message-Id: <20180615182342.6239-3-lszhu@suse.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180615182342.6239-1-lszhu@suse.com> References: <20180615182342.6239-1-lszhu@suse.com> 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 patch added a function tcmu_send_get_pr_info_event() to get Persistent Reservation info from a TCMU device, added it's wrapper function tcmu_get_dev_pr_info() as well. Signed-off-by: Zhu Lingshan --- drivers/target/target_core_user.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 1efc2800ca14..a1ed70d0988a 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -1683,6 +1683,21 @@ static int tcmu_send_dev_remove_event(struct tcmu_dev *udev) &skb, &msg_header); } +static int tcmu_send_get_pr_info_event(struct tcmu_dev *udev) +{ + struct sk_buff *skb = NULL; + void *msg_header = NULL; + int ret = 0; + + ret = tcmu_netlink_event_init(udev, TCMU_CMD_GET_PR_INFO, + &skb, &msg_header); + if (ret < 0) + return ret; + + return tcmu_netlink_event_send(udev, TCMU_CMD_GET_PR_INFO, + &skb, &msg_header); +} + static int tcmu_update_uio_info(struct tcmu_dev *udev) { struct tcmu_hba *hba = udev->hba->hba_ptr; @@ -1709,6 +1724,22 @@ static int tcmu_update_uio_info(struct tcmu_dev *udev) return 0; } +/* + * This funtion will get PR INFO(a string)from a TCMU device. + * PR INFO will be stored at udev->pr_info.pr_info_buf. + */ +static int tcmu_get_dev_pr_info(struct tcmu_dev *udev, int *val_len) +{ + int ret = 0; + + ret = tcmu_send_get_pr_info_event(udev); + *val_len = strlen(udev->pr_info.pr_info_buf); + if (*val_len == 0) + ret = -ENODATA; + + return ret; +} + static int tcmu_configure_device(struct se_device *dev) { struct tcmu_dev *udev = TCMU_DEV(dev);