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scsi: zfcp: add diagnostics buffer for exchange config data

Browse source 
In the same vein as the previous patch, add diagnostic data capture for the
Exchange Config Data command.

Link: https://lore.kernel.org/r/7d8ac0a6cad403fa8f8b888693476a84e80a277b.1572018131.git.bblock@linux.ibm.com
Reviewed-by: Steffen Maier <maier@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:
Benjamin Block 2019-10-25 18:12:45 +02:00 committed by Martin K. Petersen
parent 7e418833e6
commit 088210233e
3 changed files with 28 additions and 2 deletions
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14
drivers/s390/scsi/zfcp_diag.c
View file

@ -34,6 +34,9 @@
*/
int zfcp_diag_adapter_setup(struct zfcp_adapter *const adapter)
{
/* set the timestamp so that the first test on age will always fail */
const unsigned long initial_timestamp =
jiffies - msecs_to_jiffies(ZFCP_DIAG_MAX_AGE);
struct zfcp_diag_adapter *diag;
struct zfcp_diag_header *hdr;
@ -47,8 +50,15 @@ int zfcp_diag_adapter_setup(struct zfcp_adapter *const adapter)
spin_lock_init(&hdr->access_lock);
hdr->buffer = &diag->port_data.data;
hdr->buffer_size = sizeof(diag->port_data.data);
/* set the timestamp so that the first test on age will always fail */
hdr->timestamp = jiffies - msecs_to_jiffies(ZFCP_DIAG_MAX_AGE);
hdr->timestamp = initial_timestamp;
/* setup header for config_data */
hdr = &diag->config_data.header;
spin_lock_init(&hdr->access_lock);
hdr->buffer = &diag->config_data.data;
hdr->buffer_size = sizeof(diag->config_data.data);
hdr->timestamp = initial_timestamp;
adapter->diagnostics = diag;
return 0;

7
drivers/s390/scsi/zfcp_diag.h
View file

@ -43,12 +43,19 @@ struct zfcp_diag_header {
* @port_data: data retrieved using exchange port data.
* @port_data.header: header with metadata for the cache in @port_data.data.
* @port_data.data: cached QTCB Bottom of command exchange port data.
* @config_data: data retrieved using exchange config data.
* @config_data.header: header with metadata for the cache in @config_data.data.
* @config_data.data: cached QTCB Bottom of command exchange config data.
*/
struct zfcp_diag_adapter {
struct {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_port data;
} port_data;
struct {
struct zfcp_diag_header header;
struct fsf_qtcb_bottom_config data;
} config_data;
};
int zfcp_diag_adapter_setup(struct zfcp_adapter *const adapter);

9
drivers/s390/scsi/zfcp_fsf.c
View file

@ -556,6 +556,8 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
{
struct zfcp_adapter *adapter = req->adapter;
struct zfcp_diag_header *const diag_hdr =
&adapter->diagnostics->config_data.header;
struct fsf_qtcb *qtcb = req->qtcb;
struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
struct Scsi_Host *shost = adapter->scsi_host;
@ -572,6 +574,12 @@ static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
switch (qtcb->header.fsf_status) {
case FSF_GOOD:
/*
* usually we wait with an update till the cache is too old,
* but because we have the data available, update it anyway
*/
zfcp_diag_update_xdata(diag_hdr, bottom, false);
if (zfcp_fsf_exchange_config_evaluate(req))
return;
@ -587,6 +595,7 @@ static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
&adapter->status);
break;
case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
zfcp_diag_update_xdata(diag_hdr, bottom, true);
req->status |= ZFCP_STATUS_FSFREQ_XDATAINCOMPLETE;
fc_host_node_name(shost) = 0;