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target: Fix APTPL metadata handling for dynamic MappedLUNs 

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>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2014-10-04 04:23:15 +00:00
parent f4c24db1b7
commit e24805637d
4 changed files with 14 additions and 5 deletions
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3
drivers/target/target_core_device.c
View File

@ -1399,7 +1399,8 @@ 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;
}

6
drivers/target/target_core_pr.c
View File

@ -937,10 +937,10 @@ 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;

2
drivers/target/target_core_pr.h
View File

@ -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 *);

8
drivers/target/target_core_tpg.c
View File

@ -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);