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path: root/drivers/s390/scsi/zfcp_erp.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_erp.c')
-rw-r--r--drivers/s390/scsi/zfcp_erp.c77
1 files changed, 36 insertions, 41 deletions
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index efb47cd6ab4a..49d04e5af55f 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -4,7 +4,7 @@
*
* Error Recovery Procedures (ERP).
*
- * Copyright IBM Corp. 2002, 2016
+ * Copyright IBM Corp. 2002, 2017
*/
#define KMSG_COMPONENT "zfcp"
@@ -33,29 +33,18 @@ enum zfcp_erp_steps {
ZFCP_ERP_STEP_LUN_OPENING = 0x2000,
};
-/**
- * enum zfcp_erp_act_type - Type of ERP action object.
- * @ZFCP_ERP_ACTION_REOPEN_LUN: LUN recovery.
- * @ZFCP_ERP_ACTION_REOPEN_PORT: Port recovery.
- * @ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: Forced port recovery.
- * @ZFCP_ERP_ACTION_REOPEN_ADAPTER: Adapter recovery.
- * @ZFCP_ERP_ACTION_NONE: Eyecatcher pseudo flag to bitwise or-combine with
- * either of the first four enum values.
- * Used to indicate that an ERP action could not be
- * set up despite a detected need for some recovery.
- * @ZFCP_ERP_ACTION_FAILED: Eyecatcher pseudo flag to bitwise or-combine with
- * either of the first four enum values.
- * Used to indicate that ERP not needed because
- * the object has ZFCP_STATUS_COMMON_ERP_FAILED.
+/*
+ * Eyecatcher pseudo flag to bitwise or-combine with enum zfcp_erp_act_type.
+ * Used to indicate that an ERP action could not be set up despite a detected
+ * need for some recovery.
*/
-enum zfcp_erp_act_type {
- ZFCP_ERP_ACTION_REOPEN_LUN = 1,
- ZFCP_ERP_ACTION_REOPEN_PORT = 2,
- ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
- ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4,
- ZFCP_ERP_ACTION_NONE = 0xc0,
- ZFCP_ERP_ACTION_FAILED = 0xe0,
-};
+#define ZFCP_ERP_ACTION_NONE 0xc0
+/*
+ * Eyecatcher pseudo flag to bitwise or-combine with enum zfcp_erp_act_type.
+ * Used to indicate that ERP not needed because the object has
+ * ZFCP_STATUS_COMMON_ERP_FAILED.
+ */
+#define ZFCP_ERP_ACTION_FAILED 0xe0
enum zfcp_erp_act_result {
ZFCP_ERP_SUCCEEDED = 0,
@@ -136,11 +125,11 @@ static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
}
}
-static int zfcp_erp_handle_failed(int want, struct zfcp_adapter *adapter,
- struct zfcp_port *port,
- struct scsi_device *sdev)
+static enum zfcp_erp_act_type zfcp_erp_handle_failed(
+ enum zfcp_erp_act_type want, struct zfcp_adapter *adapter,
+ struct zfcp_port *port, struct scsi_device *sdev)
{
- int need = want;
+ enum zfcp_erp_act_type need = want;
struct zfcp_scsi_dev *zsdev;
switch (want) {
@@ -179,11 +168,12 @@ static int zfcp_erp_handle_failed(int want, struct zfcp_adapter *adapter,
return need;
}
-static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
+static enum zfcp_erp_act_type zfcp_erp_required_act(enum zfcp_erp_act_type want,
+ struct zfcp_adapter *adapter,
struct zfcp_port *port,
struct scsi_device *sdev)
{
- int need = want;
+ enum zfcp_erp_act_type need = want;
int l_status, p_status, a_status;
struct zfcp_scsi_dev *zfcp_sdev;
@@ -230,7 +220,8 @@ static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
return need;
}
-static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
+static struct zfcp_erp_action *zfcp_erp_setup_act(enum zfcp_erp_act_type need,
+ u32 act_status,
struct zfcp_adapter *adapter,
struct zfcp_port *port,
struct scsi_device *sdev)
@@ -288,18 +279,19 @@ static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status,
memset(&erp_action->timer, 0, sizeof(erp_action->timer));
erp_action->step = ZFCP_ERP_STEP_UNINITIALIZED;
erp_action->fsf_req_id = 0;
- erp_action->action = need;
+ erp_action->type = need;
erp_action->status = act_status;
return erp_action;
}
-static void zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
+static void zfcp_erp_action_enqueue(enum zfcp_erp_act_type want,
+ struct zfcp_adapter *adapter,
struct zfcp_port *port,
struct scsi_device *sdev,
char *dbftag, u32 act_status)
{
- int need;
+ enum zfcp_erp_act_type need;
struct zfcp_erp_action *act;
need = zfcp_erp_handle_failed(want, adapter, port, sdev);
@@ -672,7 +664,7 @@ static void _zfcp_erp_lun_reopen_all(struct zfcp_port *port, int clear,
static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act)
{
- switch (act->action) {
+ switch (act->type) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
_zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1");
break;
@@ -690,7 +682,7 @@ static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act)
static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act)
{
- switch (act->action) {
+ switch (act->type) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
_zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1");
break;
@@ -700,6 +692,9 @@ static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act)
case ZFCP_ERP_ACTION_REOPEN_PORT:
_zfcp_erp_lun_reopen_all(act->port, 0, "ersfs_3");
break;
+ case ZFCP_ERP_ACTION_REOPEN_LUN:
+ /* NOP */
+ break;
}
}
@@ -1163,7 +1158,7 @@ static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
struct zfcp_port *port = erp_action->port;
struct scsi_device *sdev = erp_action->sdev;
- switch (erp_action->action) {
+ switch (erp_action->type) {
case ZFCP_ERP_ACTION_REOPEN_LUN:
result = zfcp_erp_strategy_check_lun(sdev, result);
@@ -1198,14 +1193,14 @@ static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status)
static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
{
- int action = act->action;
+ enum zfcp_erp_act_type type = act->type;
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
struct scsi_device *sdev = act->sdev;
struct zfcp_scsi_dev *zfcp_sdev;
u32 erp_status = act->status;
- switch (action) {
+ switch (type) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
_zfcp_erp_adapter_reopen(adapter,
@@ -1252,7 +1247,7 @@ static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
list_del(&erp_action->list);
zfcp_dbf_rec_run("eractd1", erp_action);
- switch (erp_action->action) {
+ switch (erp_action->type) {
case ZFCP_ERP_ACTION_REOPEN_LUN:
zfcp_sdev = sdev_to_zfcp(erp_action->sdev);
atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE,
@@ -1334,7 +1329,7 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
struct zfcp_port *port = act->port;
struct scsi_device *sdev = act->sdev;
- switch (act->action) {
+ switch (act->type) {
case ZFCP_ERP_ACTION_REOPEN_LUN:
if (!(act->status & ZFCP_STATUS_ERP_NO_REF))
scsi_device_put(sdev);
@@ -1370,7 +1365,7 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
{
- switch (erp_action->action) {
+ switch (erp_action->type) {
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
return zfcp_erp_adapter_strategy(erp_action);
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-16 08:36:24 +0300