*
* Interface to Linux SCSI midlayer.
*
- * Copyright IBM Corporation 2002, 2008
+ * Copyright IBM Corporation 2002, 2009
*/
+#define KMSG_COMPONENT "zfcp"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include "zfcp_ext.h"
#include <asm/atomic.h>
static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
{
struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
- atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
unit->device = NULL;
- zfcp_erp_unit_failed(unit, 12, NULL);
+ zfcp_erp_unit_failed(unit, "scslvd1", NULL);
zfcp_unit_put(unit);
}
{
struct zfcp_unit *unit;
struct zfcp_adapter *adapter;
- int status;
- int ret;
+ int status, scsi_result, ret;
+ struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
/* reset the status for this request */
scpnt->result = 0;
return 0;
}
+ scsi_result = fc_remote_port_chkready(rport);
+ if (unlikely(scsi_result)) {
+ scpnt->result = scsi_result;
+ zfcp_scsi_dbf_event_result("fail", 4, adapter, scpnt, NULL);
+ scpnt->scsi_done(scpnt);
+ return 0;
+ }
+
status = atomic_read(&unit->status);
if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
!(status & ZFCP_STATUS_COMMON_RUNNING))) {
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))
read_lock_irqsave(&zfcp_data.config_lock, flags);
unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
- if (unit &&
- (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) {
+ if (unit) {
sdp->hostdata = unit;
unit->device = sdp;
zfcp_unit_get(unit);
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_adapter_reopen(adapter, 0, "schrh_1", scpnt);
zfcp_erp_wait(adapter);
return SUCCESS;
rport->dev_loss_tmo = timeout;
}
+/**
+ * zfcp_scsi_dev_loss_tmo_callbk - Free any reference to rport
+ * @rport: The rport that is about to be deleted.
+ */
+static void zfcp_scsi_dev_loss_tmo_callbk(struct fc_rport *rport)
+{
+ struct zfcp_port *port = rport->dd_data;
+
+ write_lock_irq(&zfcp_data.config_lock);
+ port->rport = NULL;
+ write_unlock_irq(&zfcp_data.config_lock);
+}
+
+/**
+ * zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
+ * @rport: The FC rport where to teminate I/O
+ *
+ * Abort all pending SCSI commands for a port by closing the
+ * port. Using a reopen for avoids a conflict with a shutdown
+ * overwriting a reopen.
+ */
+static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
+{
+ struct zfcp_port *port = rport->dd_data;
+
+ zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
+}
+
+static void zfcp_scsi_rport_register(struct zfcp_port *port)
+{
+ struct fc_rport_identifiers ids;
+ struct fc_rport *rport;
+
+ ids.node_name = port->wwnn;
+ ids.port_name = port->wwpn;
+ ids.port_id = port->d_id;
+ ids.roles = FC_RPORT_ROLE_FCP_TARGET;
+
+ rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
+ if (!rport) {
+ dev_err(&port->adapter->ccw_device->dev,
+ "Registering port 0x%016Lx failed\n",
+ (unsigned long long)port->wwpn);
+ return;
+ }
+
+ rport->dd_data = port;
+ rport->maxframe_size = port->maxframe_size;
+ rport->supported_classes = port->supported_classes;
+ port->rport = rport;
+}
+
+static void zfcp_scsi_rport_block(struct zfcp_port *port)
+{
+ if (port->rport)
+ fc_remote_port_delete(port->rport);
+}
+
+void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
+{
+ zfcp_port_get(port);
+ port->rport_task = RPORT_ADD;
+
+ if (!queue_work(zfcp_data.work_queue, &port->rport_work))
+ zfcp_port_put(port);
+}
+
+void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
+{
+ zfcp_port_get(port);
+ port->rport_task = RPORT_DEL;
+
+ if (!queue_work(zfcp_data.work_queue, &port->rport_work))
+ zfcp_port_put(port);
+}
+
+void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
+{
+ struct zfcp_port *port;
+
+ list_for_each_entry(port, &adapter->port_list_head, list)
+ zfcp_scsi_schedule_rport_block(port);
+}
+
+void zfcp_scsi_rport_work(struct work_struct *work)
+{
+ struct zfcp_port *port = container_of(work, struct zfcp_port,
+ rport_work);
+
+ while (port->rport_task) {
+ if (port->rport_task == RPORT_ADD) {
+ port->rport_task = RPORT_NONE;
+ zfcp_scsi_rport_register(port);
+ } else {
+ port->rport_task = RPORT_NONE;
+ zfcp_scsi_rport_block(port);
+ }
+ }
+
+ zfcp_port_put(port);
+}
+
+
struct fc_function_template zfcp_transport_functions = {
.show_starget_port_id = 1,
.show_starget_port_name = 1,
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
.get_host_port_state = zfcp_get_host_port_state,
+ .dev_loss_tmo_callbk = zfcp_scsi_dev_loss_tmo_callbk,
+ .terminate_rport_io = zfcp_scsi_terminate_rport_io,
.show_host_port_state = 1,
/* no functions registered for following dynamic attributes but
directly set by LLDD */
git.openpandora.org / pandora-kernel.git / blobdiff