[RFC,22/48] target: core: UA on all luns after reset

Commit Message

Dmitry Bogdanov March 11, 2022, 8:11 a.m. UTC

Allocate UA "BUS DEVICE RESET OCCURRED" on all LUNs on the
device upon reception of TMF LUN RESET.

That patch passes a libisci test SCSI.MultipathIO.Reset.

Signed-off-by: Dmitry Bogdanov <[e-mail]>
---
 drivers/target/target_core_device.c    | 19 +++++++++++++++++++
 drivers/target/target_core_internal.h  |  1 +
 drivers/target/target_core_transport.c |  3 +--
 3 files changed, 21 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index a4c31f3112ce..7c887792bb88 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -285,6 +285,25 @@  void target_pr_kref_release(struct kref *kref)
 	complete(&deve->pr_comp);
 }
 
+/*
+ * Establish UA condition on SCSI device - all LUNs
+ */
+void target_dev_ua_allocate(struct se_device *dev, u8 asc, u8 ascq)
+{
+	struct se_dev_entry *se_deve;
+	struct se_lun *lun;
+
+	spin_lock(&dev->se_port_lock);
+	list_for_each_entry(lun, &dev->dev_sep_list, lun_dev_link) {
+
+		spin_lock(&lun->lun_deve_lock);
+		list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link)
+			core_scsi3_ua_allocate(se_deve, asc, ascq);
+		spin_unlock(&lun->lun_deve_lock);
+	}
+	spin_unlock(&dev->se_port_lock);
+}
+
 static void
 target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new,
 			     bool skip_new)
diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h
index 8bd48eb1cf9b..eeb405908987 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -88,6 +88,7 @@  int	target_configure_device(struct se_device *dev);
 void	target_free_device(struct se_device *);
 int	target_for_each_device(int (*fn)(struct se_device *dev, void *data),
 			       void *data);
+void	target_dev_ua_allocate(struct se_device *dev, u8 asc, u8 ascq);
 
 /* target_core_configfs.c */
 extern struct configfs_item_operations target_core_dev_item_ops;
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 7838dc20f713..5926316252eb 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -3531,8 +3531,7 @@  static void target_tmr_work(struct work_struct *work)
 		tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
 					 TMR_FUNCTION_REJECTED;
 		if (tmr->response == TMR_FUNCTION_COMPLETE) {
-			target_ua_allocate_lun(cmd->se_sess->se_node_acl,
-					       cmd->orig_fe_lun, 0x29,
+			target_dev_ua_allocate(dev, 0x29,
 					       ASCQ_29H_BUS_DEVICE_RESET_FUNCTION_OCCURRED);
 		}
 		break;