diff options
| author | Nicholas Bellinger <nab@daterainc.com> | 2013-08-22 22:33:37 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-09-11 03:48:40 +0400 |
| commit | d9ea32bff2c55d4cd4654f1e98d269a758f34534 (patch) | |
| tree | 64d8c15126232442cd574312b567511f2bfac74a /drivers/target | |
| parent | c5ff8d6bc3ebc363d77d71791080fefb07ae9017 (diff) | |
| download | linux-d9ea32bff2c55d4cd4654f1e98d269a758f34534.tar.xz | |
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>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_device.c | 13 |
1 files changed, 13 insertions, 0 deletions
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); |