#include <linux/blktrace_api.h>
#include "zfcp_ext.h"
+#define ZFCP_REQ_AUTO_CLEANUP 0x00000002
+#define ZFCP_REQ_NO_QTCB 0x00000008
+
static void zfcp_fsf_request_timeout_handler(unsigned long data)
{
struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
/**
* zfcp_fsf_abort_fcp_command - abort running SCSI command
* @old_req_id: unsigned long
- * @adapter: pointer to struct zfcp_adapter
* @unit: pointer to struct zfcp_unit
- * @req_flags: integer specifying the request flags
* Returns: pointer to struct zfcp_fsf_req
- *
- * FIXME(design): should be watched by a timeout !!!
*/
struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
- struct zfcp_adapter *adapter,
- struct zfcp_unit *unit,
- int req_flags)
+ struct zfcp_unit *unit)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
+ struct zfcp_adapter *adapter = unit->port->adapter;
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
- req_flags, adapter->pool.fsf_req_abort);
+ 0, adapter->pool.fsf_req_abort);
if (IS_ERR(req)) {
req = NULL;
goto out;
/**
* zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
- * @adapter: adapter where scsi command is issued
* @unit: unit where command is sent to
* @scsi_cmnd: scsi command to be sent
- * @timer: timer to be started when request is initiated
- * @req_flags: flags for fsf_request
*/
-int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
- struct zfcp_unit *unit,
- struct scsi_cmnd *scsi_cmnd,
- int use_timer, int req_flags)
+int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit,
+ struct scsi_cmnd *scsi_cmnd)
{
struct zfcp_fsf_req *req;
struct fcp_cmnd_iu *fcp_cmnd_iu;
unsigned int sbtype;
int real_bytes, retval = -EIO;
+ struct zfcp_adapter *adapter = unit->port->adapter;
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
spin_lock(&adapter->req_q_lock);
if (!zfcp_fsf_sbal_available(adapter))
goto out;
- req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND,
+ ZFCP_REQ_AUTO_CLEANUP,
adapter->pool.fsf_req_scsi);
if (IS_ERR(req)) {
retval = PTR_ERR(req);
zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
- if (use_timer)
- zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
-
retval = zfcp_fsf_req_send(req);
if (unlikely(retval))
goto failed_scsi_cmnd;
/**
* zfcp_fsf_send_fcp_ctm - send SCSI task management command
- * @adapter: pointer to struct zfcp-adapter
* @unit: pointer to struct zfcp_unit
* @tm_flags: unsigned byte for task management flags
- * @req_flags: int request flags
* Returns: on success pointer to struct fsf_req, NULL otherwise
*/
-struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
- struct zfcp_unit *unit,
- u8 tm_flags, int req_flags)
+struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags)
{
struct qdio_buffer_element *sbale;
struct zfcp_fsf_req *req = NULL;
struct fcp_cmnd_iu *fcp_cmnd_iu;
+ struct zfcp_adapter *adapter = unit->port->adapter;
if (unlikely(!(atomic_read(&unit->status) &
ZFCP_STATUS_COMMON_UNBLOCKED)))
spin_lock_bh(&adapter->req_q_lock);
if (zfcp_fsf_req_sbal_get(adapter))
goto out;
- req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+ req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, 0,
adapter->pool.fsf_req_scsi);
if (IS_ERR(req)) {
req = NULL;
return 0;;
}
- ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0,
- ZFCP_REQ_AUTO_CLEANUP);
+ ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
if (unlikely(ret == -EBUSY))
return SCSI_MLQUEUE_DEVICE_BUSY;
else if (unlikely(ret < 0))
static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
{
- struct Scsi_Host *scsi_host;
- struct zfcp_adapter *adapter;
- struct zfcp_unit *unit;
- struct zfcp_fsf_req *fsf_req;
+ struct Scsi_Host *scsi_host = scpnt->device->host;
+ struct zfcp_adapter *adapter =
+ (struct zfcp_adapter *) scsi_host->hostdata[0];
+ struct zfcp_unit *unit = scpnt->device->hostdata;
+ struct zfcp_fsf_req *old_req, *abrt_req;
unsigned long flags;
unsigned long old_req_id = (unsigned long) scpnt->host_scribble;
int retval = SUCCESS;
-
- scsi_host = scpnt->device->host;
- adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
- unit = scpnt->device->hostdata;
+ int retry = 3;
/* avoid race condition between late normal completion and abort */
write_lock_irqsave(&adapter->abort_lock, flags);
- /* Check whether corresponding fsf_req is still pending */
spin_lock(&adapter->req_list_lock);
- fsf_req = zfcp_reqlist_find(adapter, old_req_id);
+ old_req = zfcp_reqlist_find(adapter, old_req_id);
spin_unlock(&adapter->req_list_lock);
- if (!fsf_req) {
+ if (!old_req) {
write_unlock_irqrestore(&adapter->abort_lock, flags);
- zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
- return retval;
+ zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL,
+ old_req_id);
+ return SUCCESS;
}
- fsf_req->data = NULL;
+ old_req->data = NULL;
/* don't access old fsf_req after releasing the abort_lock */
write_unlock_irqrestore(&adapter->abort_lock, flags);
- fsf_req = zfcp_fsf_abort_fcp_command(old_req_id, adapter, unit, 0);
- if (!fsf_req) {
- zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
- old_req_id);
- retval = FAILED;
- return retval;
+ while (retry--) {
+ abrt_req = zfcp_fsf_abort_fcp_command(old_req_id, unit);
+ if (abrt_req)
+ break;
+
+ zfcp_erp_wait(adapter);
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_COMMON_RUNNING)) {
+ zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
+ old_req_id);
+ return SUCCESS;
+ }
}
+ if (!abrt_req)
+ return FAILED;
- __wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ wait_event(abrt_req->completion_wq,
+ abrt_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
- zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0);
- } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
- zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0);
- } else {
- zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0);
+ if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
+ zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, abrt_req, 0);
+ else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
+ zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, abrt_req, 0);
+ else {
+ zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, abrt_req, 0);
retval = FAILED;
}
- zfcp_fsf_req_free(fsf_req);
-
+ zfcp_fsf_req_free(abrt_req);
return retval;
}
-static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags,
- struct scsi_cmnd *scpnt)
+static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
{
+ struct zfcp_unit *unit = scpnt->device->hostdata;
struct zfcp_adapter *adapter = unit->port->adapter;
struct zfcp_fsf_req *fsf_req;
int retval = SUCCESS;
-
- /* issue task management function */
- fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0);
- if (!fsf_req) {
- zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
- return FAILED;
+ int retry = 3;
+
+ while (retry--) {
+ fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
+ if (fsf_req)
+ break;
+
+ zfcp_erp_wait(adapter);
+ if (!(atomic_read(&adapter->status) &
+ ZFCP_STATUS_COMMON_RUNNING)) {
+ zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit,
+ scpnt);
+ return SUCCESS;
+ }
}
+ if (!fsf_req)
+ return FAILED;
- __wait_event(fsf_req->completion_wq,
- fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+ wait_event(fsf_req->completion_wq,
+ fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- /*
- * check completion status of task management function
- */
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
retval = FAILED;
zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
zfcp_fsf_req_free(fsf_req);
-
return retval;
}
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
{
- struct zfcp_unit *unit = scpnt->device->hostdata;
-
- if (!unit) {
- WARN_ON(1);
- return SUCCESS;
- }
- return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt);
+ return zfcp_task_mgmt_function(scpnt, FCP_LOGICAL_UNIT_RESET);
}
static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
{
- struct zfcp_unit *unit = scpnt->device->hostdata;
-
- if (!unit) {
- WARN_ON(1);
- return SUCCESS;
- }
- return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt);
+ return zfcp_task_mgmt_function(scpnt, FCP_TARGET_RESET);
}
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
{
- struct zfcp_unit *unit;
- struct zfcp_adapter *adapter;
+ struct zfcp_unit *unit = scpnt->device->hostdata;
+ struct zfcp_adapter *adapter = unit->port->adapter;
- unit = scpnt->device->hostdata;
- adapter = unit->port->adapter;
zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt);
zfcp_erp_wait(adapter);
projects / linux-beck.git / commitdiff