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scsi: zfcp: Handle event-lost notification for Version Change events

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As recovery for a lost Version Change event, trigger an Exchange Config
Data cmd to retrieve the current FW version.

Doing so requires process context (as eg. zfcp_qdio_sbal_get() might need
to sleep), so defer from tasklet context into a work item.

Link: https://lore.kernel.org/r/297c7be2944c3714863fcd22d531d910312d29f0.1603908167.git.bblock@linux.ibm.com
Suggested-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Julian Wiedmann 2020-10-28 19:30:52 +01:00 committed by Martin K. Petersen
parent a6c37abe69
commit d901963174
4 changed files with 16 additions and 0 deletions
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11
drivers/s390/scsi/zfcp_aux.c
View File

@ -292,6 +292,14 @@ static void _zfcp_status_read_scheduler(struct work_struct *work)
stat_work));
}
static void zfcp_version_change_lost_work(struct work_struct *work)
{
struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
version_change_lost_work);
zfcp_fsf_exchange_config_data_sync(adapter->qdio, NULL);
}
static void zfcp_print_sl(struct seq_file *m, struct service_level *sl)
{
struct zfcp_adapter *adapter =
@ -353,6 +361,8 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device)
INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
INIT_DELAYED_WORK(&adapter->scan_work, zfcp_fc_scan_ports);
INIT_WORK(&adapter->ns_up_work, zfcp_fc_sym_name_update);
INIT_WORK(&adapter->version_change_lost_work,
zfcp_version_change_lost_work);
adapter->next_port_scan = jiffies;
@ -429,6 +439,7 @@ void zfcp_adapter_unregister(struct zfcp_adapter *adapter)
cancel_delayed_work_sync(&adapter->scan_work);
cancel_work_sync(&adapter->stat_work);
cancel_work_sync(&adapter->ns_up_work);
cancel_work_sync(&adapter->version_change_lost_work);
zfcp_destroy_adapter_work_queue(adapter);
zfcp_fc_wka_ports_force_offline(adapter->gs);

1
drivers/s390/scsi/zfcp_def.h
View File

@ -201,6 +201,7 @@ struct zfcp_adapter {
struct zfcp_fc_events events;
unsigned long next_port_scan;
struct zfcp_diag_adapter *diagnostics;
struct work_struct version_change_lost_work;
};
struct zfcp_port {

3
drivers/s390/scsi/zfcp_fsf.c
View File

@ -309,6 +309,9 @@ static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
case FSF_STATUS_READ_NOTIFICATION_LOST:
if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
zfcp_fc_conditional_port_scan(adapter);
if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_VERSION_CHANGE)
queue_work(adapter->work_queue,
&adapter->version_change_lost_work);
break;
case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
adapter->adapter_features = sr_buf->payload.word[0];

1
drivers/s390/scsi/zfcp_fsf.h
View File

@ -143,6 +143,7 @@
/* status subtypes for unsolicited status notification lost */
#define FSF_STATUS_READ_SUB_INCOMING_ELS 0x00000001
#define FSF_STATUS_READ_SUB_VERSION_CHANGE 0x00000100
/* status subtypes for version change */
#define FSF_STATUS_READ_SUB_LIC_CHANGE 0x00000001