Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751611AbdFAKfJ (ORCPT ); Thu, 1 Jun 2017 06:35:09 -0400 Received: from mail.linux-iscsi.org ([67.23.28.174]:41245 "EHLO linux-iscsi.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751346AbdFAKfH (ORCPT ); Thu, 1 Jun 2017 06:35:07 -0400 From: "Nicholas A. Bellinger" To: target-devel Cc: linux-scsi , lkml , Nicholas Bellinger , Christoph Hellwig , Mike Christie , Hannes Reinecke Subject: [PATCH 1/2] target/configfs: Kill se_device->dev_link_magic Date: Thu, 1 Jun 2017 10:38:00 +0000 Message-Id: <1496313481-22083-1-git-send-email-nab@linux-iscsi.org> X-Mailer: git-send-email 1.7.2.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3677 Lines: 96 From: Nicholas Bellinger Instead of using a hardcoded magic value in se_device when verifying a target config_item symlink source during target_fabric_port_link(), go ahead and use target_core_dev_item_ops directly instead. Cc: Christoph Hellwig Cc: Mike Christie Cc: Hannes Reinecke Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_configfs.c | 6 +++++- drivers/target/target_core_device.c | 1 - drivers/target/target_core_fabric_configfs.c | 12 +++++++----- include/target/target_core_base.h | 2 -- 4 files changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 0326607..9b8abd5 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -2236,7 +2236,11 @@ static void target_core_dev_release(struct config_item *item) target_free_device(dev); } -static struct configfs_item_operations target_core_dev_item_ops = { +/* + * Used in target_core_fabric_configfs.c to verify valid se_device symlink + * within target_fabric_port_link() + */ +struct configfs_item_operations target_core_dev_item_ops = { .release = target_core_dev_release, }; diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index a5762e6..e4771ce 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -756,7 +756,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) if (!dev) return NULL; - dev->dev_link_magic = SE_DEV_LINK_MAGIC; dev->se_hba = hba; dev->transport = hba->backend->ops; dev->prot_length = sizeof(struct t10_pi_tuple); diff --git a/drivers/target/target_core_fabric_configfs.c b/drivers/target/target_core_fabric_configfs.c index d1e6cab..2cbaecd 100644 --- a/drivers/target/target_core_fabric_configfs.c +++ b/drivers/target/target_core_fabric_configfs.c @@ -620,6 +620,8 @@ static ssize_t target_fabric_port_alua_tg_pt_write_md_store( NULL, }; +extern struct configfs_item_operations target_core_dev_item_ops; + static int target_fabric_port_link( struct config_item *lun_ci, struct config_item *se_dev_ci) @@ -628,16 +630,16 @@ static int target_fabric_port_link( struct se_lun *lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group); struct se_portal_group *se_tpg; - struct se_device *dev = - container_of(to_config_group(se_dev_ci), struct se_device, dev_group); + struct se_device *dev; struct target_fabric_configfs *tf; int ret; - if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) { - pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:" - " %p to struct se_device: %p\n", se_dev_ci, dev); + if (!se_dev_ci->ci_type || + se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) { + pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci); return -EFAULT; } + dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group); if (!(dev->dev_flags & DF_CONFIGURED)) { pr_err("se_device not configured yet, cannot port link\n"); diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 0c1dce2..c3c14d0 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -746,8 +746,6 @@ struct se_dev_stat_grps { }; struct se_device { -#define SE_DEV_LINK_MAGIC 0xfeeddeef - u32 dev_link_magic; /* RELATIVE TARGET PORT IDENTIFER Counter */ u16 dev_rpti_counter; /* Used for SAM Task Attribute ordering */ -- 1.9.1