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: Nicholas Bellinger <nab@daterainc.com>
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@ -47,6 +47,9 @@
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#include "target_core_pr.h"
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#include "target_core_ua.h"
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DEFINE_MUTEX(g_device_mutex);
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LIST_HEAD(g_device_list);
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static struct se_hba *lun0_hba;
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/* not static, needed by tpg.c */
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struct se_device *g_lun0_dev;
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@ -1406,6 +1409,7 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
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INIT_LIST_HEAD(&dev->delayed_cmd_list);
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INIT_LIST_HEAD(&dev->state_list);
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INIT_LIST_HEAD(&dev->qf_cmd_list);
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INIT_LIST_HEAD(&dev->g_dev_node);
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spin_lock_init(&dev->stats_lock);
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spin_lock_init(&dev->execute_task_lock);
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spin_lock_init(&dev->delayed_cmd_lock);
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@ -1525,6 +1529,11 @@ int target_configure_device(struct se_device *dev)
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spin_lock(&hba->device_lock);
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hba->dev_count++;
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spin_unlock(&hba->device_lock);
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mutex_lock(&g_device_mutex);
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list_add_tail(&dev->g_dev_node, &g_device_list);
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mutex_unlock(&g_device_mutex);
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return 0;
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out_free_alua:
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@ -1543,6 +1552,10 @@ void target_free_device(struct se_device *dev)
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if (dev->dev_flags & DF_CONFIGURED) {
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destroy_workqueue(dev->tmr_wq);
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mutex_lock(&g_device_mutex);
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list_del(&dev->g_dev_node);
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mutex_unlock(&g_device_mutex);
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spin_lock(&hba->device_lock);
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hba->dev_count--;
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spin_unlock(&hba->device_lock);
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@ -686,6 +686,7 @@ struct se_device {
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struct list_head delayed_cmd_list;
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struct list_head state_list;
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struct list_head qf_cmd_list;
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struct list_head g_dev_node;
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/* Pointer to associated SE HBA */
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struct se_hba *se_hba;
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/* T10 Inquiry and VPD WWN Information */
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