target: Fix APTPL metadata handling for dynamic MappedLUNs

commit e24805637d2d270d7975502e9024d473de86afdb upstream.

This patch fixes a bug in handling of SPC-3 PR Activate Persistence
across Target Power Loss (APTPL) logic where re-creation of state for
MappedLUNs from dynamically generated NodeACLs did not occur during
I_T Nexus establishment.

It adds the missing core_scsi3_check_aptpl_registration() call during
core_tpg_check_initiator_node_acl() -> core_tpg_add_node_to_devs() in
order to replay any pre-loaded APTPL metadata state associated with
the newly connected SCSI Initiator Port.

Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 6ea95d2..38b4be2 100644 (file)
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -1409,7 +1409,8 @@ int core_dev_add_initiator_node_lun_acl(
         * Check to see if there are any existing persistent reservation APTPL
         * pre-registrations that need to be enabled for this LUN ACL..
         */
-       core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
+       core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, nacl,
+                                           lacl->mapped_lun);
        return 0;
 }
 

diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 3013287..1205dbd 100644 (file)
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -944,10 +944,10 @@ int core_scsi3_check_aptpl_registration(
        struct se_device *dev,
        struct se_portal_group *tpg,
        struct se_lun *lun,
-       struct se_lun_acl *lun_acl)
+       struct se_node_acl *nacl,
+       u32 mapped_lun)
 {
-       struct se_node_acl *nacl = lun_acl->se_lun_nacl;
-       struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun];
+       struct se_dev_entry *deve = nacl->device_list[mapped_lun];
 
        if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
                return 0;

diff --git a/drivers/target/target_core_pr.h b/drivers/target/target_core_pr.h
index 2ee2936..749fd7b 100644 (file)
--- a/drivers/target/target_core_pr.h
+++ b/drivers/target/target_core_pr.h
@@ -60,7 +60,7 @@ extern int core_scsi3_alloc_aptpl_registration(
                        unsigned char *, u16, u32, int, int, u8);
 extern int core_scsi3_check_aptpl_registration(struct se_device *,
                        struct se_portal_group *, struct se_lun *,
-                       struct se_lun_acl *);
+                       struct se_node_acl *, u32);
 extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
                                             struct se_node_acl *);
 extern void core_scsi3_free_all_registrations(struct se_device *);

diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index c036595..fb8a1a1 100644 (file)
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -40,6 +40,7 @@
 #include <target/target_core_fabric.h>
 
 #include "target_core_internal.h"
+#include "target_core_pr.h"
 
 extern struct se_device *g_lun0_dev;
 
@@ -166,6 +167,13 @@ void core_tpg_add_node_to_devs(
 
                core_enable_device_list_for_node(lun, NULL, lun->unpacked_lun,
                                lun_access, acl, tpg);
+               /*
+                * Check to see if there are any existing persistent reservation
+                * APTPL pre-registrations that need to be enabled for this dynamic
+                * LUN ACL now..
+                */
+               core_scsi3_check_aptpl_registration(dev, tpg, lun, acl,
+                                                   lun->unpacked_lun);
                spin_lock(&tpg->tpg_lun_lock);
        }
        spin_unlock(&tpg->tpg_lun_lock);