From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/drivers/s390/scsi/zfcp_erp.c | 448 ++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 290 insertions(+), 158 deletions(-)
diff --git a/kernel/drivers/s390/scsi/zfcp_erp.c b/kernel/drivers/s390/scsi/zfcp_erp.c
index b7afdb5..78d52a4 100644
--- a/kernel/drivers/s390/scsi/zfcp_erp.c
+++ b/kernel/drivers/s390/scsi/zfcp_erp.c
@@ -4,7 +4,7 @@
*
* Error Recovery Procedures (ERP).
*
- * Copyright IBM Corp. 2002, 2016
+ * Copyright IBM Corp. 2002, 2020
*/
#define KMSG_COMPONENT "zfcp"
@@ -14,6 +14,7 @@
#include <linux/bug.h>
#include "zfcp_ext.h"
#include "zfcp_reqlist.h"
+#include "zfcp_diag.h"
#define ZFCP_MAX_ERPS 3
@@ -25,38 +26,18 @@
ZFCP_STATUS_ERP_NO_REF = 0x00800000,
};
-enum zfcp_erp_steps {
- ZFCP_ERP_STEP_UNINITIALIZED = 0x0000,
- ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
- ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
- ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
- ZFCP_ERP_STEP_LUN_CLOSING = 0x1000,
- 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,
@@ -87,7 +68,7 @@
{
struct zfcp_adapter *adapter = act->adapter;
- list_move(&act->list, &act->adapter->erp_ready_head);
+ list_move(&act->list, &adapter->erp_ready_head);
zfcp_dbf_rec_run("erardy1", act);
wake_up(&adapter->erp_ready_wq);
zfcp_dbf_rec_run("erardy2", act);
@@ -137,11 +118,11 @@
}
}
-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) {
@@ -177,11 +158,12 @@
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;
@@ -193,29 +175,29 @@
return 0;
p_status = atomic_read(&port->status);
if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) ||
- p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+ p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
return 0;
if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED))
need = ZFCP_ERP_ACTION_REOPEN_PORT;
- /* fall through */
+ fallthrough;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
p_status = atomic_read(&port->status);
if (!(p_status & ZFCP_STATUS_COMMON_OPEN))
need = ZFCP_ERP_ACTION_REOPEN_PORT;
- /* fall through */
+ fallthrough;
case ZFCP_ERP_ACTION_REOPEN_PORT:
p_status = atomic_read(&port->status);
if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE)
return 0;
a_status = atomic_read(&adapter->status);
if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) ||
- a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+ a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
return 0;
if (p_status & ZFCP_STATUS_COMMON_NOESC)
return need;
if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED))
need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
- /* fall through */
+ fallthrough;
case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
a_status = atomic_read(&adapter->status);
if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
@@ -228,7 +210,8 @@
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)
@@ -282,9 +265,6 @@
ZFCP_STATUS_COMMON_RUNNING))
act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY;
break;
-
- default:
- return NULL;
}
WARN_ON_ONCE(erp_action->adapter != adapter);
@@ -292,18 +272,19 @@
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 *id, u32 act_status)
+ 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);
@@ -331,10 +312,11 @@
list_add_tail(&act->list, &adapter->erp_ready_head);
wake_up(&adapter->erp_ready_wq);
out:
- zfcp_dbf_rec_trig(id, adapter, port, sdev, want, need);
+ zfcp_dbf_rec_trig(dbftag, adapter, port, sdev, want, need);
}
-void zfcp_erp_port_forced_no_port_dbf(char *id, struct zfcp_adapter *adapter,
+void zfcp_erp_port_forced_no_port_dbf(char *dbftag,
+ struct zfcp_adapter *adapter,
u64 port_name, u32 port_id)
{
unsigned long flags;
@@ -348,29 +330,30 @@
atomic_set(&tmpport.status, -1); /* unknown */
tmpport.wwpn = port_name;
tmpport.d_id = port_id;
- zfcp_dbf_rec_trig(id, adapter, &tmpport, NULL,
+ zfcp_dbf_rec_trig(dbftag, adapter, &tmpport, NULL,
ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
ZFCP_ERP_ACTION_NONE);
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
static void _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter,
- int clear_mask, char *id)
+ int clear_mask, char *dbftag)
{
zfcp_erp_adapter_block(adapter, clear_mask);
zfcp_scsi_schedule_rports_block(adapter);
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
- adapter, NULL, NULL, id, 0);
+ adapter, NULL, NULL, dbftag, 0);
}
/**
* zfcp_erp_adapter_reopen - Reopen adapter.
* @adapter: Adapter to reopen.
* @clear: Status flags to clear.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*/
-void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, char *id)
+void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear,
+ char *dbftag)
{
unsigned long flags;
@@ -379,7 +362,7 @@
write_lock_irqsave(&adapter->erp_lock, flags);
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter,
- NULL, NULL, id, 0);
+ NULL, NULL, dbftag, 0);
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
@@ -387,25 +370,25 @@
* zfcp_erp_adapter_shutdown - Shutdown adapter.
* @adapter: Adapter to shut down.
* @clear: Status flags to clear.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*/
void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear,
- char *id)
+ char *dbftag)
{
int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
- zfcp_erp_adapter_reopen(adapter, clear | flags, id);
+ zfcp_erp_adapter_reopen(adapter, clear | flags, dbftag);
}
/**
* zfcp_erp_port_shutdown - Shutdown port
* @port: Port to shut down.
* @clear: Status flags to clear.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*/
-void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id)
+void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *dbftag)
{
int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
- zfcp_erp_port_reopen(port, clear | flags, id);
+ zfcp_erp_port_reopen(port, clear | flags, dbftag);
}
static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
@@ -415,53 +398,55 @@
}
static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear,
- char *id)
+ char *dbftag)
{
zfcp_erp_port_block(port, clear);
zfcp_scsi_schedule_rport_block(port);
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
- port->adapter, port, NULL, id, 0);
+ port->adapter, port, NULL, dbftag, 0);
}
/**
* zfcp_erp_port_forced_reopen - Forced close of port and open again
* @port: Port to force close and to reopen.
* @clear: Status flags to clear.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*/
-void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id)
+void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear,
+ char *dbftag)
{
unsigned long flags;
struct zfcp_adapter *adapter = port->adapter;
write_lock_irqsave(&adapter->erp_lock, flags);
- _zfcp_erp_port_forced_reopen(port, clear, id);
+ _zfcp_erp_port_forced_reopen(port, clear, dbftag);
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
-static void _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id)
+static void _zfcp_erp_port_reopen(struct zfcp_port *port, int clear,
+ char *dbftag)
{
zfcp_erp_port_block(port, clear);
zfcp_scsi_schedule_rport_block(port);
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
- port->adapter, port, NULL, id, 0);
+ port->adapter, port, NULL, dbftag, 0);
}
/**
* zfcp_erp_port_reopen - trigger remote port recovery
* @port: port to recover
- * @clear_mask: flags in port status to be cleared
- * @id: Id for debug trace event.
+ * @clear: flags in port status to be cleared
+ * @dbftag: Tag for debug trace event.
*/
-void zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id)
+void zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *dbftag)
{
unsigned long flags;
struct zfcp_adapter *adapter = port->adapter;
write_lock_irqsave(&adapter->erp_lock, flags);
- _zfcp_erp_port_reopen(port, clear, id);
+ _zfcp_erp_port_reopen(port, clear, dbftag);
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
@@ -471,8 +456,8 @@
ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask);
}
-static void _zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id,
- u32 act_status)
+static void _zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear,
+ char *dbftag, u32 act_status)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
@@ -480,18 +465,18 @@
zfcp_erp_lun_block(sdev, clear);
zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_LUN, adapter,
- zfcp_sdev->port, sdev, id, act_status);
+ zfcp_sdev->port, sdev, dbftag, act_status);
}
/**
* zfcp_erp_lun_reopen - initiate reopen of a LUN
* @sdev: SCSI device / LUN to be reopened
- * @clear_mask: specifies flags in LUN status to be cleared
- * @id: Id for debug trace event.
+ * @clear: specifies flags in LUN status to be cleared
+ * @dbftag: Tag for debug trace event.
*
* Return: 0 on success, < 0 on error
*/
-void zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id)
+void zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *dbftag)
{
unsigned long flags;
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
@@ -499,7 +484,7 @@
struct zfcp_adapter *adapter = port->adapter;
write_lock_irqsave(&adapter->erp_lock, flags);
- _zfcp_erp_lun_reopen(sdev, clear, id, 0);
+ _zfcp_erp_lun_reopen(sdev, clear, dbftag, 0);
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
@@ -507,25 +492,25 @@
* zfcp_erp_lun_shutdown - Shutdown LUN
* @sdev: SCSI device / LUN to shut down.
* @clear: Status flags to clear.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*/
-void zfcp_erp_lun_shutdown(struct scsi_device *sdev, int clear, char *id)
+void zfcp_erp_lun_shutdown(struct scsi_device *sdev, int clear, char *dbftag)
{
int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
- zfcp_erp_lun_reopen(sdev, clear | flags, id);
+ zfcp_erp_lun_reopen(sdev, clear | flags, dbftag);
}
/**
* zfcp_erp_lun_shutdown_wait - Shutdown LUN and wait for erp completion
* @sdev: SCSI device / LUN to shut down.
- * @id: Id for debug trace event.
+ * @dbftag: Tag for debug trace event.
*
* Do not acquire a reference for the LUN when creating the ERP
* action. It is safe, because this function waits for the ERP to
* complete first. This allows to shutdown the LUN, even when the SCSI
* device is in the state SDEV_DEL when scsi_device_get will fail.
*/
-void zfcp_erp_lun_shutdown_wait(struct scsi_device *sdev, char *id)
+void zfcp_erp_lun_shutdown_wait(struct scsi_device *sdev, char *dbftag)
{
unsigned long flags;
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
@@ -534,7 +519,7 @@
int clear = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
write_lock_irqsave(&adapter->erp_lock, flags);
- _zfcp_erp_lun_reopen(sdev, clear, id, ZFCP_STATUS_ERP_NO_REF);
+ _zfcp_erp_lun_reopen(sdev, clear, dbftag, ZFCP_STATUS_ERP_NO_REF);
write_unlock_irqrestore(&adapter->erp_lock, flags);
zfcp_erp_wait(adapter);
@@ -626,7 +611,7 @@
/**
* zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
- * @data: ERP action (from timer data)
+ * @t: timer list entry embedded in zfcp FSF request
*/
void zfcp_erp_timeout_handler(struct timer_list *t)
{
@@ -671,31 +656,31 @@
}
static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
- int clear, char *id)
+ int clear, char *dbftag)
{
struct zfcp_port *port;
read_lock(&adapter->port_list_lock);
list_for_each_entry(port, &adapter->port_list, list)
- _zfcp_erp_port_reopen(port, clear, id);
+ _zfcp_erp_port_reopen(port, clear, dbftag);
read_unlock(&adapter->port_list_lock);
}
static void _zfcp_erp_lun_reopen_all(struct zfcp_port *port, int clear,
- char *id)
+ char *dbftag)
{
struct scsi_device *sdev;
spin_lock(port->adapter->scsi_host->host_lock);
__shost_for_each_device(sdev, port->adapter->scsi_host)
if (sdev_to_zfcp(sdev)->port == port)
- _zfcp_erp_lun_reopen(sdev, clear, id, 0);
+ _zfcp_erp_lun_reopen(sdev, clear, dbftag, 0);
spin_unlock(port->adapter->scsi_host->host_lock);
}
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;
@@ -713,7 +698,7 @@
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;
@@ -722,6 +707,9 @@
break;
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;
}
}
@@ -750,7 +738,8 @@
zfcp_erp_port_reopen(port, 0, "ereptp1");
}
-static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_adapter_strat_fsf_xconf(
+ struct zfcp_erp_action *erp_action)
{
int retries;
int sleep = 1;
@@ -789,13 +778,18 @@
if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK))
return ZFCP_ERP_FAILED;
- if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
- zfcp_erp_enqueue_ptp_port(adapter);
-
return ZFCP_ERP_SUCCEEDED;
}
-static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act)
+static void
+zfcp_erp_adapter_strategy_open_ptp_port(struct zfcp_adapter *const adapter)
+{
+ if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
+ zfcp_erp_enqueue_ptp_port(adapter);
+}
+
+static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open_fsf_xport(
+ struct zfcp_erp_action *act)
{
int ret;
struct zfcp_adapter *adapter = act->adapter;
@@ -820,13 +814,73 @@
return ZFCP_ERP_SUCCEEDED;
}
-static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
+static enum zfcp_erp_act_result
+zfcp_erp_adapter_strategy_alloc_shost(struct zfcp_adapter *const adapter)
+{
+ struct zfcp_diag_adapter_config_data *const config_data =
+ &adapter->diagnostics->config_data;
+ struct zfcp_diag_adapter_port_data *const port_data =
+ &adapter->diagnostics->port_data;
+ unsigned long flags;
+ int rc;
+
+ rc = zfcp_scsi_adapter_register(adapter);
+ if (rc == -EEXIST)
+ return ZFCP_ERP_SUCCEEDED;
+ else if (rc)
+ return ZFCP_ERP_FAILED;
+
+ /*
+ * We allocated the shost for the first time. Before it was NULL,
+ * and so we deferred all updates in the xconf- and xport-data
+ * handlers. We need to make up for that now, and make all the updates
+ * that would have been done before.
+ *
+ * We can be sure that xconf- and xport-data succeeded, because
+ * otherwise this function is not called. But they might have been
+ * incomplete.
+ */
+
+ spin_lock_irqsave(&config_data->header.access_lock, flags);
+ zfcp_scsi_shost_update_config_data(adapter, &config_data->data,
+ !!config_data->header.incomplete);
+ spin_unlock_irqrestore(&config_data->header.access_lock, flags);
+
+ if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
+ spin_lock_irqsave(&port_data->header.access_lock, flags);
+ zfcp_scsi_shost_update_port_data(adapter, &port_data->data);
+ spin_unlock_irqrestore(&port_data->header.access_lock, flags);
+ }
+
+ /*
+ * There is a remote possibility that the 'Exchange Port Data' request
+ * reports a different connectivity status than 'Exchange Config Data'.
+ * But any change to the connectivity status of the local optic that
+ * happens after the initial xconf request is expected to be reported
+ * to us, as soon as we post Status Read Buffers to the FCP channel
+ * firmware after this function. So any resulting inconsistency will
+ * only be momentary.
+ */
+ if (config_data->header.incomplete)
+ zfcp_fsf_fc_host_link_down(adapter);
+
+ return ZFCP_ERP_SUCCEEDED;
+}
+
+static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open_fsf(
+ struct zfcp_erp_action *act)
{
if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED)
return ZFCP_ERP_FAILED;
if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
return ZFCP_ERP_FAILED;
+
+ if (zfcp_erp_adapter_strategy_alloc_shost(act->adapter) ==
+ ZFCP_ERP_FAILED)
+ return ZFCP_ERP_FAILED;
+
+ zfcp_erp_adapter_strategy_open_ptp_port(act->adapter);
if (mempool_resize(act->adapter->pool.sr_data,
act->adapter->stat_read_buf_num))
@@ -859,7 +913,8 @@
ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
}
-static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act)
+static enum zfcp_erp_act_result zfcp_erp_adapter_strategy_open(
+ struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
@@ -880,7 +935,8 @@
return ZFCP_ERP_SUCCEEDED;
}
-static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act)
+static enum zfcp_erp_act_result zfcp_erp_adapter_strategy(
+ struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
@@ -898,7 +954,8 @@
return ZFCP_ERP_SUCCEEDED;
}
-static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
+static enum zfcp_erp_act_result zfcp_erp_port_forced_strategy_close(
+ struct zfcp_erp_action *act)
{
int retval;
@@ -912,7 +969,8 @@
return ZFCP_ERP_CONTINUES;
}
-static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_port_forced_strategy(
+ struct zfcp_erp_action *erp_action)
{
struct zfcp_port *port = erp_action->port;
int status = atomic_read(&port->status);
@@ -928,11 +986,19 @@
case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN))
return ZFCP_ERP_SUCCEEDED;
+ break;
+ case ZFCP_ERP_STEP_PORT_CLOSING:
+ case ZFCP_ERP_STEP_PORT_OPENING:
+ case ZFCP_ERP_STEP_LUN_CLOSING:
+ case ZFCP_ERP_STEP_LUN_OPENING:
+ /* NOP */
+ break;
}
return ZFCP_ERP_FAILED;
}
-static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_port_strategy_close(
+ struct zfcp_erp_action *erp_action)
{
int retval;
@@ -945,7 +1011,8 @@
return ZFCP_ERP_CONTINUES;
}
-static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_port_strategy_open_port(
+ struct zfcp_erp_action *erp_action)
{
int retval;
@@ -971,7 +1038,8 @@
return zfcp_erp_port_strategy_open_port(act);
}
-static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
+static enum zfcp_erp_act_result zfcp_erp_port_strategy_open_common(
+ struct zfcp_erp_action *act)
{
struct zfcp_adapter *adapter = act->adapter;
struct zfcp_port *port = act->port;
@@ -1002,12 +1070,18 @@
port->d_id = 0;
return ZFCP_ERP_FAILED;
}
- /* fall through otherwise */
+ /* no early return otherwise, continue after switch case */
+ break;
+ case ZFCP_ERP_STEP_LUN_CLOSING:
+ case ZFCP_ERP_STEP_LUN_OPENING:
+ /* NOP */
+ break;
}
return ZFCP_ERP_FAILED;
}
-static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_port_strategy(
+ struct zfcp_erp_action *erp_action)
{
struct zfcp_port *port = erp_action->port;
int p_status = atomic_read(&port->status);
@@ -1026,6 +1100,12 @@
if (p_status & ZFCP_STATUS_COMMON_OPEN)
return ZFCP_ERP_FAILED;
break;
+ case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+ case ZFCP_ERP_STEP_PORT_OPENING:
+ case ZFCP_ERP_STEP_LUN_CLOSING:
+ case ZFCP_ERP_STEP_LUN_OPENING:
+ /* NOP */
+ break;
}
close_init_done:
@@ -1043,7 +1123,8 @@
&zfcp_sdev->status);
}
-static int zfcp_erp_lun_strategy_close(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_lun_strategy_close(
+ struct zfcp_erp_action *erp_action)
{
int retval = zfcp_fsf_close_lun(erp_action);
if (retval == -ENOMEM)
@@ -1054,7 +1135,8 @@
return ZFCP_ERP_CONTINUES;
}
-static int zfcp_erp_lun_strategy_open(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_lun_strategy_open(
+ struct zfcp_erp_action *erp_action)
{
int retval = zfcp_fsf_open_lun(erp_action);
if (retval == -ENOMEM)
@@ -1065,7 +1147,8 @@
return ZFCP_ERP_CONTINUES;
}
-static int zfcp_erp_lun_strategy(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_lun_strategy(
+ struct zfcp_erp_action *erp_action)
{
struct scsi_device *sdev = erp_action->sdev;
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
@@ -1075,7 +1158,8 @@
zfcp_erp_lun_strategy_clearstati(sdev);
if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN)
return zfcp_erp_lun_strategy_close(erp_action);
- /* already closed, fall through */
+ /* already closed */
+ fallthrough;
case ZFCP_ERP_STEP_LUN_CLOSING:
if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN)
return ZFCP_ERP_FAILED;
@@ -1086,11 +1170,18 @@
case ZFCP_ERP_STEP_LUN_OPENING:
if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN)
return ZFCP_ERP_SUCCEEDED;
+ break;
+ case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+ case ZFCP_ERP_STEP_PORT_CLOSING:
+ case ZFCP_ERP_STEP_PORT_OPENING:
+ /* NOP */
+ break;
}
return ZFCP_ERP_FAILED;
}
-static int zfcp_erp_strategy_check_lun(struct scsi_device *sdev, int result)
+static enum zfcp_erp_act_result zfcp_erp_strategy_check_lun(
+ struct scsi_device *sdev, enum zfcp_erp_act_result result)
{
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev);
@@ -1111,6 +1202,12 @@
ZFCP_STATUS_COMMON_ERP_FAILED);
}
break;
+ case ZFCP_ERP_CONTINUES:
+ case ZFCP_ERP_EXIT:
+ case ZFCP_ERP_DISMISSED:
+ case ZFCP_ERP_NOMEM:
+ /* NOP */
+ break;
}
if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
@@ -1120,7 +1217,8 @@
return result;
}
-static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
+static enum zfcp_erp_act_result zfcp_erp_strategy_check_port(
+ struct zfcp_port *port, enum zfcp_erp_act_result result)
{
switch (result) {
case ZFCP_ERP_SUCCEEDED :
@@ -1142,6 +1240,12 @@
ZFCP_STATUS_COMMON_ERP_FAILED);
}
break;
+ case ZFCP_ERP_CONTINUES:
+ case ZFCP_ERP_EXIT:
+ case ZFCP_ERP_DISMISSED:
+ case ZFCP_ERP_NOMEM:
+ /* NOP */
+ break;
}
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
@@ -1151,8 +1255,8 @@
return result;
}
-static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter,
- int result)
+static enum zfcp_erp_act_result zfcp_erp_strategy_check_adapter(
+ struct zfcp_adapter *adapter, enum zfcp_erp_act_result result)
{
switch (result) {
case ZFCP_ERP_SUCCEEDED :
@@ -1170,6 +1274,12 @@
ZFCP_STATUS_COMMON_ERP_FAILED);
}
break;
+ case ZFCP_ERP_CONTINUES:
+ case ZFCP_ERP_EXIT:
+ case ZFCP_ERP_DISMISSED:
+ case ZFCP_ERP_NOMEM:
+ /* NOP */
+ break;
}
if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
@@ -1179,14 +1289,14 @@
return result;
}
-static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
- int result)
+static enum zfcp_erp_act_result zfcp_erp_strategy_check_target(
+ struct zfcp_erp_action *erp_action, enum zfcp_erp_act_result result)
{
struct zfcp_adapter *adapter = erp_action->adapter;
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);
@@ -1219,16 +1329,17 @@
return 0;
}
-static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
+static enum zfcp_erp_act_result zfcp_erp_strategy_statechange(
+ struct zfcp_erp_action *act, enum zfcp_erp_act_result result)
{
- 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,
@@ -1258,7 +1369,7 @@
}
break;
}
- return ret;
+ return result;
}
static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
@@ -1275,7 +1386,7 @@
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,
@@ -1354,13 +1465,14 @@
write_unlock_irqrestore(&adapter->erp_lock, flags);
}
-static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
+static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act,
+ enum zfcp_erp_act_result result)
{
struct zfcp_adapter *adapter = act->adapter;
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);
@@ -1376,7 +1488,7 @@
if (act->step != ZFCP_ERP_STEP_UNINITIALIZED)
if (result == ZFCP_ERP_SUCCEEDED)
zfcp_erp_try_rport_unblock(port);
- /* fall through */
+ fallthrough;
case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
put_device(&port->dev);
break;
@@ -1394,9 +1506,10 @@
}
}
-static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result 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:
@@ -1409,9 +1522,10 @@
return ZFCP_ERP_FAILED;
}
-static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
+static enum zfcp_erp_act_result zfcp_erp_strategy(
+ struct zfcp_erp_action *erp_action)
{
- int retval;
+ enum zfcp_erp_act_result result;
unsigned long flags;
struct zfcp_adapter *adapter = erp_action->adapter;
@@ -1422,12 +1536,12 @@
if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
zfcp_erp_action_dequeue(erp_action);
- retval = ZFCP_ERP_DISMISSED;
+ result = ZFCP_ERP_DISMISSED;
goto unlock;
}
if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) {
- retval = ZFCP_ERP_FAILED;
+ result = ZFCP_ERP_FAILED;
goto check_target;
}
@@ -1435,13 +1549,13 @@
/* no lock to allow for blocking operations */
write_unlock_irqrestore(&adapter->erp_lock, flags);
- retval = zfcp_erp_strategy_do_action(erp_action);
+ result = zfcp_erp_strategy_do_action(erp_action);
write_lock_irqsave(&adapter->erp_lock, flags);
if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
- retval = ZFCP_ERP_CONTINUES;
+ result = ZFCP_ERP_CONTINUES;
- switch (retval) {
+ switch (result) {
case ZFCP_ERP_NOMEM:
if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
++adapter->erp_low_mem_count;
@@ -1451,7 +1565,7 @@
_zfcp_erp_adapter_reopen(adapter, 0, "erstgy1");
else {
zfcp_erp_strategy_memwait(erp_action);
- retval = ZFCP_ERP_CONTINUES;
+ result = ZFCP_ERP_CONTINUES;
}
goto unlock;
@@ -1461,33 +1575,38 @@
erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
}
goto unlock;
+ case ZFCP_ERP_SUCCEEDED:
+ case ZFCP_ERP_FAILED:
+ case ZFCP_ERP_EXIT:
+ case ZFCP_ERP_DISMISSED:
+ /* NOP */
+ break;
}
check_target:
- retval = zfcp_erp_strategy_check_target(erp_action, retval);
+ result = zfcp_erp_strategy_check_target(erp_action, result);
zfcp_erp_action_dequeue(erp_action);
- retval = zfcp_erp_strategy_statechange(erp_action, retval);
- if (retval == ZFCP_ERP_EXIT)
+ result = zfcp_erp_strategy_statechange(erp_action, result);
+ if (result == ZFCP_ERP_EXIT)
goto unlock;
- if (retval == ZFCP_ERP_SUCCEEDED)
+ if (result == ZFCP_ERP_SUCCEEDED)
zfcp_erp_strategy_followup_success(erp_action);
- if (retval == ZFCP_ERP_FAILED)
+ if (result == ZFCP_ERP_FAILED)
zfcp_erp_strategy_followup_failed(erp_action);
unlock:
write_unlock_irqrestore(&adapter->erp_lock, flags);
- if (retval != ZFCP_ERP_CONTINUES)
- zfcp_erp_action_cleanup(erp_action, retval);
+ if (result != ZFCP_ERP_CONTINUES)
+ zfcp_erp_action_cleanup(erp_action, result);
kref_put(&adapter->ref, zfcp_adapter_release);
- return retval;
+ return result;
}
static int zfcp_erp_thread(void *data)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
- struct list_head *next;
struct zfcp_erp_action *act;
unsigned long flags;
@@ -1500,12 +1619,11 @@
break;
write_lock_irqsave(&adapter->erp_lock, flags);
- next = adapter->erp_ready_head.next;
+ act = list_first_entry_or_null(&adapter->erp_ready_head,
+ struct zfcp_erp_action, list);
write_unlock_irqrestore(&adapter->erp_lock, flags);
- if (next != &adapter->erp_ready_head) {
- act = list_entry(next, struct zfcp_erp_action, list);
-
+ if (act) {
/* there is more to come after dismission, no notify */
if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED)
zfcp_erp_wakeup(adapter);
@@ -1519,7 +1637,7 @@
* zfcp_erp_thread_setup - Start ERP thread for adapter
* @adapter: Adapter to start the ERP thread for
*
- * Returns 0 on success or error code from kernel_thread()
+ * Return: 0 on success, or error code from kthread_run().
*/
int zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
{
@@ -1589,6 +1707,13 @@
atomic_or(common_mask, &port->status);
read_unlock_irqrestore(&adapter->port_list_lock, flags);
+ /*
+ * if `scsi_host` is missing, xconfig/xport data has never completed
+ * yet, so we can't access it, but there are also no SDEVs yet
+ */
+ if (adapter->scsi_host == NULL)
+ return;
+
spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
__shost_for_each_device(sdev, adapter->scsi_host)
atomic_or(common_mask, &sdev_to_zfcp(sdev)->status);
@@ -1625,6 +1750,13 @@
atomic_set(&port->erp_counter, 0);
}
read_unlock_irqrestore(&adapter->port_list_lock, flags);
+
+ /*
+ * if `scsi_host` is missing, xconfig/xport data has never completed
+ * yet, so we can't access it, but there are also no SDEVs yet
+ */
+ if (adapter->scsi_host == NULL)
+ return;
spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
__shost_for_each_device(sdev, adapter->scsi_host) {
@@ -1724,11 +1856,11 @@
/**
* zfcp_erp_adapter_reset_sync() - Really reopen adapter and wait.
* @adapter: Pointer to zfcp_adapter to reopen.
- * @id: Trace tag string of length %ZFCP_DBF_TAG_LEN.
+ * @dbftag: Trace tag string of length %ZFCP_DBF_TAG_LEN.
*/
-void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter, char *id)
+void zfcp_erp_adapter_reset_sync(struct zfcp_adapter *adapter, char *dbftag)
{
zfcp_erp_set_adapter_status(adapter, ZFCP_STATUS_COMMON_RUNNING);
- zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, id);
+ zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, dbftag);
zfcp_erp_wait(adapter);
}
--
Gitblit v1.6.2