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authorHannes Reinecke <hare@suse.de>2015-06-11 11:01:26 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2015-06-17 09:27:04 +0300
commitc51c8e7bcac966f209da83630fc8ca7e6cad279b (patch)
treea4823a8d68916d5cdd7a580d4b1bba4dd2a3fa5f /drivers
parent316058134ffa0017199b460318e109aa79432cc6 (diff)
downloadlinux-c51c8e7bcac966f209da83630fc8ca7e6cad279b.tar.xz
target: use 'se_dev_entry' when allocating UAs
We need to use 'se_dev_entry' as argument when allocating UAs, otherwise we'll never see any UAs for an implicit ALUA state transition triggered from userspace. (Add target_ua_allocate_lun() common caller - nab) Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/target/target_core_alua.c27
-rw-r--r--drivers/target/target_core_pr.c12
-rw-r--r--drivers/target/target_core_transport.c12
-rw-r--r--drivers/target/target_core_ua.c42
-rw-r--r--drivers/target/target_core_ua.h3
5 files changed, 54 insertions, 42 deletions
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index 228a3c7925e5..aa2e4b103d43 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -972,23 +972,32 @@ static void core_alua_queue_state_change_ua(struct t10_alua_tg_pt_gp *tg_pt_gp)
list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) {
lacl = rcu_dereference_check(se_deve->se_lun_acl,
lockdep_is_held(&lun->lun_deve_lock));
+
/*
- * se_deve->se_lun_acl pointer may be NULL for a
- * entry created without explicit Node+MappedLUN ACLs
+ * spc4r37 p.242:
+ * After an explicit target port asymmetric access
+ * state change, a device server shall establish a
+ * unit attention condition with the additional sense
+ * code set to ASYMMETRIC ACCESS STATE CHANGED for
+ * the initiator port associated with every I_T nexus
+ * other than the I_T nexus on which the SET TARGET
+ * PORT GROUPS command was received.
*/
- if (!lacl)
- continue;
-
if ((tg_pt_gp->tg_pt_gp_alua_access_status ==
ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
- (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) &&
- (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl) &&
(tg_pt_gp->tg_pt_gp_alua_lun != NULL) &&
(tg_pt_gp->tg_pt_gp_alua_lun == lun))
continue;
- core_scsi3_ua_allocate(lacl->se_lun_nacl,
- se_deve->mapped_lun, 0x2A,
+ /*
+ * se_deve->se_lun_acl pointer may be NULL for a
+ * entry created without explicit Node+MappedLUN ACLs
+ */
+ if (lacl && (tg_pt_gp->tg_pt_gp_alua_nacl != NULL) &&
+ (tg_pt_gp->tg_pt_gp_alua_nacl == lacl->se_lun_nacl))
+ continue;
+
+ core_scsi3_ua_allocate(se_deve, 0x2A,
ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
}
spin_unlock_bh(&lun->lun_deve_lock);
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 436e30b14a11..0bb329243dba 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -2197,7 +2197,7 @@ core_scsi3_emulate_pro_register(struct se_cmd *cmd, u64 res_key, u64 sa_res_key,
&pr_tmpl->registration_list,
pr_reg_list) {
- core_scsi3_ua_allocate(
+ target_ua_allocate_lun(
pr_reg_p->pr_reg_nacl,
pr_reg_p->pr_res_mapped_lun,
0x2A,
@@ -2624,7 +2624,7 @@ core_scsi3_emulate_pro_release(struct se_cmd *cmd, int type, int scope,
if (pr_reg_p == pr_reg)
continue;
- core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl,
+ target_ua_allocate_lun(pr_reg_p->pr_reg_nacl,
pr_reg_p->pr_res_mapped_lun,
0x2A, ASCQ_2AH_RESERVATIONS_RELEASED);
}
@@ -2709,7 +2709,7 @@ core_scsi3_emulate_pro_clear(struct se_cmd *cmd, u64 res_key)
* additional sense code set to RESERVATIONS PREEMPTED.
*/
if (!calling_it_nexus)
- core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun,
+ target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun,
0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED);
}
spin_unlock(&pr_tmpl->registration_lock);
@@ -2918,7 +2918,7 @@ core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key,
NULL, 0);
}
if (!calling_it_nexus)
- core_scsi3_ua_allocate(pr_reg_nacl,
+ target_ua_allocate_lun(pr_reg_nacl,
pr_res_mapped_lun, 0x2A,
ASCQ_2AH_REGISTRATIONS_PREEMPTED);
}
@@ -3024,7 +3024,7 @@ core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key,
* persistent reservation and/or registration, with the
* additional sense code set to REGISTRATIONS PREEMPTED;
*/
- core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A,
+ target_ua_allocate_lun(pr_reg_nacl, pr_res_mapped_lun, 0x2A,
ASCQ_2AH_REGISTRATIONS_PREEMPTED);
}
spin_unlock(&pr_tmpl->registration_lock);
@@ -3057,7 +3057,7 @@ core_scsi3_pro_preempt(struct se_cmd *cmd, int type, int scope, u64 res_key,
if (calling_it_nexus)
continue;
- core_scsi3_ua_allocate(pr_reg->pr_reg_nacl,
+ target_ua_allocate_lun(pr_reg->pr_reg_nacl,
pr_reg->pr_res_mapped_lun, 0x2A,
ASCQ_2AH_RESERVATIONS_RELEASED);
}
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index eed9580b7f6c..0364534f8d46 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1677,13 +1677,13 @@ void transport_generic_request_failure(struct se_cmd *cmd,
* See spc4r17, section 7.4.6 Control Mode Page, Table 349
*/
if (cmd->se_sess &&
- cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2)
- core_scsi3_ua_allocate(cmd->se_sess->se_node_acl,
- cmd->orig_fe_lun, 0x2C,
- ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
-
+ cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2) {
+ target_ua_allocate_lun(cmd->se_sess->se_node_acl,
+ cmd->orig_fe_lun, 0x2C,
+ ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
+ }
trace_target_cmd_complete(cmd);
- ret = cmd->se_tfo-> queue_status(cmd);
+ ret = cmd->se_tfo->queue_status(cmd);
if (ret == -EAGAIN || ret == -ENOMEM)
goto queue_full;
goto check_stop;
diff --git a/drivers/target/target_core_ua.c b/drivers/target/target_core_ua.c
index e5062245171e..fc095aed5a88 100644
--- a/drivers/target/target_core_ua.c
+++ b/drivers/target/target_core_ua.c
@@ -87,18 +87,11 @@ target_scsi3_ua_check(struct se_cmd *cmd)
}
int core_scsi3_ua_allocate(
- struct se_node_acl *nacl,
- u64 unpacked_lun,
+ struct se_dev_entry *deve,
u8 asc,
u8 ascq)
{
- struct se_dev_entry *deve;
struct se_ua *ua, *ua_p, *ua_tmp;
- /*
- * PASSTHROUGH OPS
- */
- if (!nacl)
- return -EINVAL;
ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
if (!ua) {
@@ -110,12 +103,6 @@ int core_scsi3_ua_allocate(
ua->ua_asc = asc;
ua->ua_ascq = ascq;
- rcu_read_lock();
- deve = target_nacl_find_deve(nacl, unpacked_lun);
- if (!deve) {
- rcu_read_unlock();
- return -EINVAL;
- }
spin_lock(&deve->ua_lock);
list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
/*
@@ -123,7 +110,6 @@ int core_scsi3_ua_allocate(
*/
if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
spin_unlock(&deve->ua_lock);
- rcu_read_unlock();
kmem_cache_free(se_ua_cache, ua);
return 0;
}
@@ -170,22 +156,38 @@ int core_scsi3_ua_allocate(
spin_unlock(&deve->ua_lock);
atomic_inc_mb(&deve->ua_count);
- rcu_read_unlock();
return 0;
}
list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
spin_unlock(&deve->ua_lock);
- pr_debug("[%s]: Allocated UNIT ATTENTION, mapped LUN: %llu, ASC:"
- " 0x%02x, ASCQ: 0x%02x\n",
- nacl->se_tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
+ pr_debug("Allocated UNIT ATTENTION, mapped LUN: %llu, ASC:"
+ " 0x%02x, ASCQ: 0x%02x\n", deve->mapped_lun,
asc, ascq);
atomic_inc_mb(&deve->ua_count);
- rcu_read_unlock();
return 0;
}
+void target_ua_allocate_lun(struct se_node_acl *nacl,
+ u32 unpacked_lun, u8 asc, u8 ascq)
+{
+ struct se_dev_entry *deve;
+
+ if (!nacl)
+ return;
+
+ rcu_read_lock();
+ deve = target_nacl_find_deve(nacl, unpacked_lun);
+ if (!deve) {
+ rcu_read_unlock();
+ return;
+ }
+
+ core_scsi3_ua_allocate(deve, asc, ascq);
+ rcu_read_unlock();
+}
+
void core_scsi3_ua_release_all(
struct se_dev_entry *deve)
{
diff --git a/drivers/target/target_core_ua.h b/drivers/target/target_core_ua.h
index 6e592b10a8c0..96460bff490f 100644
--- a/drivers/target/target_core_ua.h
+++ b/drivers/target/target_core_ua.h
@@ -28,7 +28,8 @@
extern struct kmem_cache *se_ua_cache;
extern sense_reason_t target_scsi3_ua_check(struct se_cmd *);
-extern int core_scsi3_ua_allocate(struct se_node_acl *, u64, u8, u8);
+extern int core_scsi3_ua_allocate(struct se_dev_entry *, u8, u8);
+extern void target_ua_allocate_lun(struct se_node_acl *, u32, u8, u8);
extern void core_scsi3_ua_release_all(struct se_dev_entry *);
extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);
extern int core_scsi3_ua_clear_for_request_sense(struct se_cmd *,