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path: root/drivers/target/target_core_device.c
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Diffstat (limited to 'drivers/target/target_core_device.c')
-rw-r--r--drivers/target/target_core_device.c44
1 files changed, 43 insertions, 1 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 8f4142fe5f1..d90dbb0f1a6 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -4,7 +4,7 @@
* This file contains the TCM Virtual Device and Disk Transport
* agnostic related functions.
*
- * (c) Copyright 2003-2012 RisingTide Systems LLC.
+ * (c) Copyright 2003-2013 Datera, Inc.
*
* Nicholas A. Bellinger <nab@kernel.org>
*
@@ -47,6 +47,9 @@
#include "target_core_pr.h"
#include "target_core_ua.h"
+DEFINE_MUTEX(g_device_mutex);
+LIST_HEAD(g_device_list);
+
static struct se_hba *lun0_hba;
/* not static, needed by tpg.c */
struct se_device *g_lun0_dev;
@@ -890,6 +893,32 @@ int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
return 0;
}
+int se_dev_set_emulate_caw(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ dev->dev_attrib.emulate_caw = flag;
+ pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n",
+ dev, flag);
+
+ return 0;
+}
+
+int se_dev_set_emulate_3pc(struct se_device *dev, int flag)
+{
+ if (flag != 0 && flag != 1) {
+ pr_err("Illegal value %d\n", flag);
+ return -EINVAL;
+ }
+ dev->dev_attrib.emulate_3pc = flag;
+ pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n",
+ dev, flag);
+
+ return 0;
+}
+
int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
{
if ((flag != 0) && (flag != 1)) {
@@ -1393,6 +1422,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
INIT_LIST_HEAD(&dev->delayed_cmd_list);
INIT_LIST_HEAD(&dev->state_list);
INIT_LIST_HEAD(&dev->qf_cmd_list);
+ INIT_LIST_HEAD(&dev->g_dev_node);
spin_lock_init(&dev->stats_lock);
spin_lock_init(&dev->execute_task_lock);
spin_lock_init(&dev->delayed_cmd_lock);
@@ -1400,6 +1430,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
spin_lock_init(&dev->se_port_lock);
spin_lock_init(&dev->se_tmr_lock);
spin_lock_init(&dev->qf_cmd_lock);
+ sema_init(&dev->caw_sem, 1);
atomic_set(&dev->dev_ordered_id, 0);
INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
@@ -1423,6 +1454,8 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
+ dev->dev_attrib.emulate_caw = DA_EMULATE_CAW;
+ dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC;
dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
dev->dev_attrib.is_nonrot = DA_IS_NONROT;
dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
@@ -1510,6 +1543,11 @@ int target_configure_device(struct se_device *dev)
spin_lock(&hba->device_lock);
hba->dev_count++;
spin_unlock(&hba->device_lock);
+
+ mutex_lock(&g_device_mutex);
+ list_add_tail(&dev->g_dev_node, &g_device_list);
+ mutex_unlock(&g_device_mutex);
+
return 0;
out_free_alua:
@@ -1528,6 +1566,10 @@ void target_free_device(struct se_device *dev)
if (dev->dev_flags & DF_CONFIGURED) {
destroy_workqueue(dev->tmr_wq);
+ mutex_lock(&g_device_mutex);
+ list_del(&dev->g_dev_node);
+ mutex_unlock(&g_device_mutex);
+
spin_lock(&hba->device_lock);
hba->dev_count--;
spin_unlock(&hba->device_lock);