From d9ea32bff2c55d4cd4654f1e98d269a758f34534 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Thu, 22 Aug 2013 11:33:37 -0700 Subject: 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 Cc: Hannes Reinecke Cc: Martin Petersen Cc: Chris Mason Cc: Roland Dreier Cc: Zach Brown Cc: James Bottomley Cc: Nicholas Bellinger Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_device.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/target') diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index f3dc1f5fc41c..b2b081236abb 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -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); -- cgit v1.2.3