[RFC PATCH 06/48] scsi: target/core: Drop device-based RTPI

From: Dmitry Bogdanov <d.bogdanov@yadro.com>
To: Martin Petersen <martin.petersen@oracle.com>,
	<target-devel@vger.kernel.org>
Cc: <linux-scsi@vger.kernel.org>, <linux@yadro.com>,
	Roman Bolshakov <r.bolshakov@yadro.com>,
	Dmitry Bogdanov <d.bogdanov@yadro.com>
Subject: [RFC PATCH 06/48] scsi: target/core: Drop device-based RTPI
Date: Sun, 22 Dec 2019 02:49:48 +0300	[thread overview]
Message-ID: <20220803162857.27770-7-d.bogdanov@yadro.com> (raw)
In-Reply-To: <20220803162857.27770-1-d.bogdanov@yadro.com>

From: Roman Bolshakov <r.bolshakov@yadro.com>

The code is not needed since target port-based RTPI allocation replaced
it.

Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
---
 drivers/target/target_core_device.c   | 41 ---------------------------
 drivers/target/target_core_internal.h |  1 -
 drivers/target/target_core_tpg.c      |  6 ----
 include/target/target_core_base.h     |  4 ---
 4 files changed, 52 deletions(-)

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index bbef6b869ee9..40a582b084d7 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -470,47 +470,6 @@ void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
 	mutex_unlock(&tpg->acl_node_mutex);
 }
 
-int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev)
-{
-	struct se_lun *tmp;
-
-	spin_lock(&dev->se_port_lock);
-	if (dev->export_count == 0x0000ffff) {
-		pr_warn("Reached dev->dev_port_count =="
-				" 0x0000ffff\n");
-		spin_unlock(&dev->se_port_lock);
-		return -ENOSPC;
-	}
-again:
-	/*
-	 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
-	 * Here is the table from spc4r17 section 7.7.3.8.
-	 *
-	 *    Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
-	 *
-	 * Code      Description
-	 * 0h        Reserved
-	 * 1h        Relative port 1, historically known as port A
-	 * 2h        Relative port 2, historically known as port B
-	 * 3h to FFFFh    Relative port 3 through 65 535
-	 */
-	lun->lun_rtpi = dev->dev_rpti_counter++;
-	if (!lun->lun_rtpi)
-		goto again;
-
-	list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) {
-		/*
-		 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
-		 * for 16-bit wrap..
-		 */
-		if (lun->lun_rtpi == tmp->lun_rtpi)
-			goto again;
-	}
-	spin_unlock(&dev->se_port_lock);
-
-	return 0;
-}
-
 static void se_release_vpd_for_dev(struct se_device *dev)
 {
 	struct t10_vpd *vpd, *vpd_tmp;
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index a889a6237d9c..7dcc62749edd 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -59,7 +59,6 @@ struct target_fabric_configfs {
 extern struct t10_alua_lu_gp *default_lu_gp;
 
 /* target_core_device.c */
-int	core_alloc_rtpi(struct se_lun *lun, struct se_device *dev);
 struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
 void	target_pr_kref_release(struct kref *);
 void	core_free_device_list_for_node(struct se_node_acl *,
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index 1b7ab98bbd04..502bd85bf75c 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -648,10 +648,6 @@ int core_tpg_add_lun(
 	if (ret < 0)
 		goto out;
 
-	ret = core_alloc_rtpi(lun, dev);
-	if (ret)
-		goto out_kill_ref;
-
 	if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA) &&
 	    !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE))
 		target_attach_tg_pt_gp(lun, dev->t10_alua.default_tg_pt_gp);
@@ -675,8 +671,6 @@ int core_tpg_add_lun(
 
 	return 0;
 
-out_kill_ref:
-	percpu_ref_exit(&lun->lun_ref);
 out:
 	return ret;
 }
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 72fe94afc7a5..6ed484683ab6 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -734,8 +734,6 @@ struct se_lun {
 	bool			lun_access_ro;
 	u32			lun_index;
 
-	/* RELATIVE TARGET PORT IDENTIFER */
-	u16			lun_rtpi;
 	atomic_t		lun_acl_count;
 	struct se_device __rcu	*lun_se_dev;
 
@@ -787,8 +785,6 @@ struct se_device_queue {
 };
 
 struct se_device {
-	/* RELATIVE TARGET PORT IDENTIFER Counter */
-	u16			dev_rpti_counter;
 	/* Used for SAM Task Attribute ordering */
 	u32			dev_cur_ordered_id;
 	u32			dev_flags;
-- 
2.25.1

