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Commit d9ea32bf authored by Nicholas Bellinger's avatar Nicholas Bellinger Committed by Nicholas Bellinger
Browse files

target: Add global device list for EXTENDED_COPY 



EXTENDED_COPY needs to be able to search a global list of devices
based on NAA WWN device identifiers, so add a simple g_device_list
protected by g_device_mutex.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Chris Mason <chris.mason@fusionio.com>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Zach Brown <zab@redhat.com>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: default avatarNicholas Bellinger <nab@daterainc.com>
parent c5ff8d6b

drivers/target/target_core_device.c

+13 −0
Original line number Diff line number Diff line
@@ -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;
@@ -1406,6 +1409,7 @@ 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);
@@ -1525,6 +1529,11 @@ 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:
@@ -1543,6 +1552,10 @@ 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);

include/target/target_core_base.h

+1 −0
Original line number Diff line number Diff line
@@ -686,6 +686,7 @@ struct se_device { 
	struct list_head	delayed_cmd_list;

	struct list_head	state_list;

	struct list_head	qf_cmd_list;

	struct list_head	g_dev_node;

	/* Pointer to associated SE HBA */

	struct se_hba		*se_hba;

	/* T10 Inquiry and VPD WWN Information */