From patchwork Thu Apr 19 09:38:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Lingshan X-Patchwork-Id: 10349443 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 0F31160365 for ; Thu, 19 Apr 2018 09:39:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 00D3D28984 for ; Thu, 19 Apr 2018 09:39:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E9ABD289B1; Thu, 19 Apr 2018 09:39:17 +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 89D2228984 for ; Thu, 19 Apr 2018 09:39:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752118AbeDSJjR (ORCPT ); Thu, 19 Apr 2018 05:39:17 -0400 Received: from smtp2.provo.novell.com ([137.65.250.81]:51448 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751092AbeDSJjQ (ORCPT ); Thu, 19 Apr 2018 05:39:16 -0400 Received: from localhost.localdomain (prv-ext-foundry1int.gns.novell.com [137.65.251.240]) by smtp2.provo.novell.com with ESMTP (TLS encrypted); Thu, 19 Apr 2018 03:39:13 -0600 From: Zhu Lingshan To: target-devel@vger.kernel.org, nab@linux-iscsi.org, mchristi@redhat.com Cc: hare@suse.de, lduncan@suse.com, Zhu Lingshan Subject: [PATCH v2 5/6] tcmu: refactor nl dev_size attr with new helpers Date: Thu, 19 Apr 2018 17:38:22 +0800 Message-Id: <20180419093823.3441-5-lszhu@suse.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180419093823.3441-1-lszhu@suse.com> References: <20180419093823.3441-1-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 use new netlink events helpers tcmu_netlink_init() and tcmu_netlink_send() to refactor netlink event attribute TCMU_ATTR_DEV_SIZE(belongs to TCMU_CMD_RECONFIG_DEVICE) which is also dev_size in configFS. Signed-off-by: Zhu Lingshan --- Changes in V2: - return tcmu_netlink_event_send() directly, instead of a ret value. drivers/target/target_core_user.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 21ce7dd8420d..c5bc2e1a9c49 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -2299,6 +2299,26 @@ static ssize_t tcmu_dev_size_show(struct config_item *item, char *page) return snprintf(page, PAGE_SIZE, "%zu\n", udev->dev_size); } +static int tcmu_send_dev_size_event(struct tcmu_dev *udev, u64 size) +{ + struct sk_buff *skb = NULL; + void *msg_header = NULL; + int ret = 0; + + ret = tcmu_netlink_event_init(udev, TCMU_CMD_RECONFIG_DEVICE, + &skb, &msg_header); + if (ret < 0) + return ret; + ret = nla_put_u64_64bit(skb, TCMU_ATTR_DEV_SIZE, + size, TCMU_ATTR_PAD); + if (ret < 0) { + nlmsg_free(skb); + return ret; + } + return tcmu_netlink_event_send(udev, TCMU_CMD_RECONFIG_DEVICE, + &skb, &msg_header); +} + static ssize_t tcmu_dev_size_store(struct config_item *item, const char *page, size_t count) { @@ -2314,8 +2334,7 @@ static ssize_t tcmu_dev_size_store(struct config_item *item, const char *page, /* Check if device has been configured before */ if (tcmu_dev_configured(udev)) { - ret = tcmu_netlink_event(udev, TCMU_CMD_RECONFIG_DEVICE, - TCMU_ATTR_DEV_SIZE, &val); + ret = tcmu_send_dev_size_event(udev, val); if (ret) { pr_err("Unable to reconfigure device\n"); return ret;