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target: Add global device list for EXTENDED_COPY

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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: Nicholas Bellinger <nab@daterainc.com>
This commit is contained in:
Nicholas Bellinger 2013-08-22 11:33:37 -07:00 committed by Nicholas Bellinger
parent c5ff8d6bc3
commit d9ea32bff2
2 changed files with 14 additions and 0 deletions
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13
drivers/target/target_core_device.c
View file

@ -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);

1
include/target/target_core_base.h
View file

@ -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 */