From patchwork Fri Apr 6 18:31:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Duncan X-Patchwork-Id: 10327465 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 8F6F46053F for ; Fri, 6 Apr 2018 18:32:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81C54295DF for ; Fri, 6 Apr 2018 18:32:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76F23295E4; Fri, 6 Apr 2018 18:32:03 +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=unavailable 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 77721295E3 for ; Fri, 6 Apr 2018 18:32:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752398AbeDFScA (ORCPT ); Fri, 6 Apr 2018 14:32:00 -0400 Received: from mx2.suse.de ([195.135.220.15]:59127 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751976AbeDFSb4 (ORCPT ); Fri, 6 Apr 2018 14:31:56 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 2CDDFAC50; Fri, 6 Apr 2018 18:31:55 +0000 (UTC) From: Lee Duncan To: Linux SCSI , Target Development , Christoph Hellwig Cc: nab@linux-iscsi.org, hare@suse.de, Lee Duncan Subject: [PATCHv2] target: prefer dbroot of /etc/target over /var/target Date: Fri, 6 Apr 2018 11:31:41 -0700 Message-Id: <20180406183141.20089-1-lduncan@suse.com> X-Mailer: git-send-email 2.13.6 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 The target database root directory, dbroot, has defaulted to /var/target for a while, but its main client, targetcli-fb, has been moving it to /etc/target for quite some time. With the plethora of target drivers now appearing, it has become more difficult to initialize this attribute before use by any child drivers. If the directory /etc/target exists, use that as the DB root. Otherwise, fall back to using /var/target. The ability to override this dbroot attribute still exists via sysfs. Signed-off-by: Lee Duncan Reviewed-by: Christoph Hellwig --- drivers/target/target_core_configfs.c | 25 +++++++++++++++++++++++++ drivers/target/target_core_internal.h | 1 + 2 files changed, 26 insertions(+) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 3f4bf126eed0..5ccef7d597fa 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -155,6 +155,8 @@ static ssize_t target_core_item_dbroot_store(struct config_item *item, mutex_unlock(&g_tf_lock); + pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); + return read_bytes; } @@ -3213,6 +3215,27 @@ void target_setup_backend_cits(struct target_backend *tb) target_core_setup_dev_stat_cit(tb); } +static void target_init_dbroot(void) +{ + struct file *fp; + + snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED); + fp = filp_open(db_root_stage, O_RDONLY, 0); + if (IS_ERR(fp)) { + pr_err("db_root: cannot open: %s\n", db_root_stage); + return; + } + if (!S_ISDIR(file_inode(fp)->i_mode)) { + filp_close(fp, NULL); + pr_err("db_root: not a valid directory: %s\n", db_root_stage); + return; + } + filp_close(fp, NULL); + + strncpy(db_root, db_root_stage, DB_ROOT_LEN); + pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); +} + static int __init target_core_init_configfs(void) { struct configfs_subsystem *subsys = &target_core_fabrics; @@ -3293,6 +3316,8 @@ static int __init target_core_init_configfs(void) if (ret < 0) goto out; + target_init_dbroot(); + return 0; out: diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 1d5afc3ae017..dead30b1d32c 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -166,6 +166,7 @@ extern struct se_portal_group xcopy_pt_tpg; /* target_core_configfs.c */ #define DB_ROOT_LEN 4096 #define DB_ROOT_DEFAULT "/var/target" +#define DB_ROOT_PREFERRED "/etc/target" extern char db_root[];