>From bc587053a97f5cb21688dcf770d806202c8f0066 Mon Sep 17 00:00:00 2001
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Date: Mon, 23 Mar 2009 22:30:11 -0700
Subject: [PATCH 3/5] [Target_Core_Mod/ConfigFS]: Add emulated_tas READ/WRITE device attribute
This patch adds support for setting TASK_ABORTED status via configfs in
/sys/kernel/config/target/core/$HBA/$DEV/attrib/emulated_tas. This currently
requires that no active symlinks into $FABRIC_MOD code exists in order to be
changed. But default, this value has been set to ENABLED via
target_core_base.h:DA_EMULATE_TAS.
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/lio-core/target_core_configfs.c | 4 ++++
drivers/lio-core/target_core_device.c | 21 +++++++++++++++++++++
drivers/lio-core/target_core_device.h | 1 +
3 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/lio-core/target_core_configfs.c b/drivers/lio-core/target_core_configfs.c
index 4909caf..5473d4c 100644
--- a/drivers/lio-core/target_core_configfs.c
+++ b/drivers/lio-core/target_core_configfs.c
@@ -478,6 +478,9 @@ SE_DEV_ATTR(status_thread, S_IRUGO | S_IWUSR);
DEF_DEV_ATTRIB(status_thread_tur);
SE_DEV_ATTR(status_thread_tur, S_IRUGO | S_IWUSR);
+DEF_DEV_ATTRIB(emulate_tas);
+SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
+
DEF_DEV_ATTRIB_RO(hw_block_size);
SE_DEV_ATTR_RO(hw_block_size);
@@ -504,6 +507,7 @@ CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib_s, da_group);
static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
&target_core_dev_attrib_status_thread.attr,
&target_core_dev_attrib_status_thread_tur.attr,
+ &target_core_dev_attrib_emulate_tas.attr,
&target_core_dev_attrib_hw_block_size.attr,
&target_core_dev_attrib_block_size.attr,
&target_core_dev_attrib_hw_max_sectors.attr,
diff --git a/drivers/lio-core/target_core_device.c b/drivers/lio-core/target_core_device.c
index 6183ba0..a1c5c95 100644
--- a/drivers/lio-core/target_core_device.c
+++ b/drivers/lio-core/target_core_device.c
@@ -869,6 +869,7 @@ void se_dev_set_default_attribs(se_device_t *dev)
{
DEV_ATTRIB(dev)->status_thread = DA_STATUS_THREAD;
DEV_ATTRIB(dev)->status_thread_tur = DA_STATUS_THREAD_TUR;
+ DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
/*
@@ -969,6 +970,26 @@ int se_dev_set_status_thread_tur(se_device_t *dev, int flag)
return 0;
}
+int se_dev_set_emulate_tas(se_device_t *dev, int flag)
+{
+ if ((flag != 0) && (flag != 1)) {
+ printk(KERN_ERR "Illegal value %d\n", flag);
+ return 1;
+ }
+
+ if (DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj)) {
+ printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
+ " dev_export_obj: %d count exists\n", dev,
+ DEV_OBJ_API(dev)->check_count(&dev->dev_export_obj));
+ return -1;
+ }
+ DEV_ATTRIB(dev)->emulate_tas = flag;
+ printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
+ dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
+
+ return 0;
+}
+
/*
* Note, this can only be called on unexported SE Device Object.
*/
diff --git a/drivers/lio-core/target_core_device.h b/drivers/lio-core/target_core_device.h
index f8d3016..3b46ef1 100644
--- a/drivers/lio-core/target_core_device.h
+++ b/drivers/lio-core/target_core_device.h
@@ -62,6 +62,7 @@ extern void se_dev_set_default_attribs(se_device_t *);
extern int se_dev_set_task_timeout(se_device_t *, u32);
extern int se_dev_set_status_thread(se_device_t *, int);
extern int se_dev_set_status_thread_tur(se_device_t *, int);
+extern int se_dev_set_emulate_tas(se_device_t *, int);
extern int se_dev_set_queue_depth(se_device_t *, u32);
extern int se_dev_set_max_sectors(se_device_t *, u32);
extern int se_dev_set_block_size(se_device_t *, u32);
--
1.5.4.1
--
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