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path: root/drivers/s390/scsi/zfcp_scsi.c
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Diffstat (limited to 'drivers/s390/scsi/zfcp_scsi.c')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c297
1 files changed, 83 insertions, 214 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 31a76065cf28..3dcd1bfba3b4 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -44,7 +44,8 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *);
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
-static int zfcp_task_management_function(struct zfcp_unit *, u8);
+static int zfcp_task_management_function(struct zfcp_unit *, u8,
+ struct scsi_cmnd *);
static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int, scsi_id_t,
scsi_lun_t);
@@ -242,7 +243,10 @@ static void
zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
{
set_host_byte(&scpnt->result, result);
- zfcp_cmd_dbf_event_scsi("failing", scpnt);
+ if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
+ zfcp_scsi_dbf_event_result("fail", 4,
+ (struct zfcp_adapter*) scpnt->device->host->hostdata[0],
+ scpnt);
/* return directly */
scpnt->scsi_done(scpnt);
}
@@ -414,67 +418,38 @@ zfcp_port_lookup(struct zfcp_adapter *adapter, int channel, scsi_id_t id)
return (struct zfcp_port *) NULL;
}
-/*
- * function: zfcp_scsi_eh_abort_handler
- *
- * purpose: tries to abort the specified (timed out) SCSI command
- *
- * note: We do not need to care for a SCSI command which completes
- * normally but late during this abort routine runs.
- * We are allowed to return late commands to the SCSI stack.
- * It tracks the state of commands and will handle late commands.
- * (Usually, the normal completion of late commands is ignored with
- * respect to the running abort operation. Grep for 'done_late'
- * in the SCSI stacks sources.)
+/**
+ * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
+ * @scpnt: pointer to scsi_cmnd to be aborted
+ * Return: SUCCESS - command has been aborted and cleaned up in internal
+ * bookkeeping, SCSI stack won't be called for aborted command
+ * FAILED - otherwise
*
- * returns: SUCCESS - command has been aborted and cleaned up in internal
- * bookkeeping,
- * SCSI stack won't be called for aborted command
- * FAILED - otherwise
+ * We do not need to care for a SCSI command which completes normally
+ * but late during this abort routine runs. We are allowed to return
+ * late commands to the SCSI stack. It tracks the state of commands and
+ * will handle late commands. (Usually, the normal completion of late
+ * commands is ignored with respect to the running abort operation.)
*/
int
-__zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
+zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
{
+ struct Scsi_Host *scsi_host;
+ struct zfcp_adapter *adapter;
+ struct zfcp_unit *unit;
int retval = SUCCESS;
- struct zfcp_fsf_req *new_fsf_req, *old_fsf_req;
- struct zfcp_adapter *adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
- struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
- struct zfcp_port *port = unit->port;
- struct Scsi_Host *scsi_host = scpnt->device->host;
- union zfcp_req_data *req_data = NULL;
+ struct zfcp_fsf_req *new_fsf_req = NULL;
+ struct zfcp_fsf_req *old_fsf_req;
unsigned long flags;
- u32 status = 0;
-
- /* the components of a abort_dbf record (fixed size record) */
- u64 dbf_scsi_cmnd = (unsigned long) scpnt;
- char dbf_opcode[ZFCP_ABORT_DBF_LENGTH];
- wwn_t dbf_wwn = port->wwpn;
- fcp_lun_t dbf_fcp_lun = unit->fcp_lun;
- u64 dbf_retries = scpnt->retries;
- u64 dbf_allowed = scpnt->allowed;
- u64 dbf_timeout = 0;
- u64 dbf_fsf_req = 0;
- u64 dbf_fsf_status = 0;
- u64 dbf_fsf_qual[2] = { 0, 0 };
- char dbf_result[ZFCP_ABORT_DBF_LENGTH] = "##undef";
-
- memset(dbf_opcode, 0, ZFCP_ABORT_DBF_LENGTH);
- memcpy(dbf_opcode,
- scpnt->cmnd,
- min(scpnt->cmd_len, (unsigned char) ZFCP_ABORT_DBF_LENGTH));
+
+ scsi_host = scpnt->device->host;
+ adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
+ unit = (struct zfcp_unit *) scpnt->device->hostdata;
ZFCP_LOG_INFO("aborting scsi_cmnd=%p on adapter %s\n",
scpnt, zfcp_get_busid_by_adapter(adapter));
- spin_unlock_irq(scsi_host->host_lock);
-
- /*
- * Race condition between normal (late) completion and abort has
- * to be avoided.
- * The entirity of all accesses to scsi_req have to be atomic.
- * scsi_req is usually part of the fsf_req and thus we block the
- * release of fsf_req as long as we need to access scsi_req.
- */
+ /* avoid race condition between late normal completion and abort */
write_lock_irqsave(&adapter->abort_lock, flags);
/*
@@ -484,144 +459,47 @@ __zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
* this routine returns. (scpnt is parameter passed to this routine
* and must not disappear during abort even on late completion.)
*/
- req_data = (union zfcp_req_data *) scpnt->host_scribble;
- /* DEBUG */
- ZFCP_LOG_DEBUG("req_data=%p\n", req_data);
- if (!req_data) {
- ZFCP_LOG_DEBUG("late command completion overtook abort\n");
- /*
- * That's it.
- * Do not initiate abort but return SUCCESS.
- */
- write_unlock_irqrestore(&adapter->abort_lock, flags);
- retval = SUCCESS;
- strncpy(dbf_result, "##late1", ZFCP_ABORT_DBF_LENGTH);
- goto out;
- }
-
- /* Figure out which fsf_req needs to be aborted. */
- old_fsf_req = req_data->send_fcp_command_task.fsf_req;
-
- dbf_fsf_req = (unsigned long) old_fsf_req;
- dbf_timeout =
- (jiffies - req_data->send_fcp_command_task.start_jiffies) / HZ;
-
- ZFCP_LOG_DEBUG("old_fsf_req=%p\n", old_fsf_req);
+ old_fsf_req = (struct zfcp_fsf_req *) scpnt->host_scribble;
if (!old_fsf_req) {
write_unlock_irqrestore(&adapter->abort_lock, flags);
- ZFCP_LOG_NORMAL("bug: no old fsf request found\n");
- ZFCP_LOG_NORMAL("req_data:\n");
- ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
- (char *) req_data, sizeof (union zfcp_req_data));
- ZFCP_LOG_NORMAL("scsi_cmnd:\n");
- ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
- (char *) scpnt, sizeof (struct scsi_cmnd));
- retval = FAILED;
- strncpy(dbf_result, "##bug:r", ZFCP_ABORT_DBF_LENGTH);
+ zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, new_fsf_req);
+ retval = SUCCESS;
goto out;
}
- old_fsf_req->data.send_fcp_command_task.scsi_cmnd = NULL;
- /* mark old request as being aborted */
+ old_fsf_req->data = 0;
old_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
- /*
- * We have to collect all information (e.g. unit) needed by
- * zfcp_fsf_abort_fcp_command before calling that routine
- * since that routine is not allowed to access
- * fsf_req which it is going to abort.
- * This is because of we need to release fsf_req_list_lock
- * before calling zfcp_fsf_abort_fcp_command.
- * Since this lock will not be held, fsf_req may complete
- * late and may be released meanwhile.
- */
- ZFCP_LOG_DEBUG("unit 0x%016Lx (%p)\n", unit->fcp_lun, unit);
- /*
- * We block (call schedule)
- * That's why we must release the lock and enable the
- * interrupts before.
- * On the other hand we do not need the lock anymore since
- * all critical accesses to scsi_req are done.
- */
+ /* don't access old_fsf_req after releasing the abort_lock */
write_unlock_irqrestore(&adapter->abort_lock, flags);
/* call FSF routine which does the abort */
new_fsf_req = zfcp_fsf_abort_fcp_command((unsigned long) old_fsf_req,
adapter, unit, 0);
- ZFCP_LOG_DEBUG("new_fsf_req=%p\n", new_fsf_req);
if (!new_fsf_req) {
+ ZFCP_LOG_INFO("error: initiation of Abort FCP Cmnd failed\n");
retval = FAILED;
- ZFCP_LOG_NORMAL("error: initiation of Abort FCP Cmnd "
- "failed\n");
- strncpy(dbf_result, "##nores", ZFCP_ABORT_DBF_LENGTH);
goto out;
}
/* wait for completion of abort */
- ZFCP_LOG_DEBUG("waiting for cleanup...\n");
-#if 1
- /*
- * FIXME:
- * copying zfcp_fsf_req_wait_and_cleanup code is not really nice
- */
__wait_event(new_fsf_req->completion_wq,
new_fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
- status = new_fsf_req->status;
- dbf_fsf_status = new_fsf_req->qtcb->header.fsf_status;
- /*
- * Ralphs special debug load provides timestamps in the FSF
- * status qualifier. This might be specified later if being
- * useful for debugging aborts.
- */
- dbf_fsf_qual[0] =
- *(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[0];
- dbf_fsf_qual[1] =
- *(u64 *) & new_fsf_req->qtcb->header.fsf_status_qual.word[2];
- zfcp_fsf_req_free(new_fsf_req);
-#else
- retval = zfcp_fsf_req_wait_and_cleanup(new_fsf_req,
- ZFCP_UNINTERRUPTIBLE, &status);
-#endif
- ZFCP_LOG_DEBUG("Waiting for cleanup complete, status=0x%x\n", status);
+
/* status should be valid since signals were not permitted */
- if (status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
+ if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
+ zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, new_fsf_req);
retval = SUCCESS;
- strncpy(dbf_result, "##succ", ZFCP_ABORT_DBF_LENGTH);
- } else if (status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
+ } else if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
+ zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, new_fsf_req);
retval = SUCCESS;
- strncpy(dbf_result, "##late2", ZFCP_ABORT_DBF_LENGTH);
} else {
+ zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, new_fsf_req);
retval = FAILED;
- strncpy(dbf_result, "##fail", ZFCP_ABORT_DBF_LENGTH);
}
-
+ zfcp_fsf_req_free(new_fsf_req);
out:
- debug_event(adapter->abort_dbf, 1, &dbf_scsi_cmnd, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_opcode, ZFCP_ABORT_DBF_LENGTH);
- debug_event(adapter->abort_dbf, 1, &dbf_wwn, sizeof (wwn_t));
- debug_event(adapter->abort_dbf, 1, &dbf_fcp_lun, sizeof (fcp_lun_t));
- debug_event(adapter->abort_dbf, 1, &dbf_retries, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_allowed, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_timeout, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_fsf_req, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_fsf_status, sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_fsf_qual[0], sizeof (u64));
- debug_event(adapter->abort_dbf, 1, &dbf_fsf_qual[1], sizeof (u64));
- debug_text_event(adapter->abort_dbf, 1, dbf_result);
-
- spin_lock_irq(scsi_host->host_lock);
return retval;
}
-int
-zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
-{
- int rc;
- struct Scsi_Host *scsi_host = scpnt->device->host;
- spin_lock_irq(scsi_host->host_lock);
- rc = __zfcp_scsi_eh_abort_handler(scpnt);
- spin_unlock_irq(scsi_host->host_lock);
- return rc;
-}
-
/*
* function: zfcp_scsi_eh_device_reset_handler
*
@@ -651,8 +529,9 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
*/
if (!atomic_test_mask(ZFCP_STATUS_UNIT_NOTSUPPUNITRESET,
&unit->status)) {
- retval =
- zfcp_task_management_function(unit, FCP_LOGICAL_UNIT_RESET);
+ retval = zfcp_task_management_function(unit,
+ FCP_LOGICAL_UNIT_RESET,
+ scpnt);
if (retval) {
ZFCP_LOG_DEBUG("unit reset failed (unit=%p)\n", unit);
if (retval == -ENOTSUPP)
@@ -668,7 +547,7 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
goto out;
}
}
- retval = zfcp_task_management_function(unit, FCP_TARGET_RESET);
+ retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt);
if (retval) {
ZFCP_LOG_DEBUG("target reset failed (unit=%p)\n", unit);
retval = FAILED;
@@ -681,12 +560,12 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
}
static int
-zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags)
+zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags,
+ struct scsi_cmnd *scpnt)
{
struct zfcp_adapter *adapter = unit->port->adapter;
- int retval;
- int status;
struct zfcp_fsf_req *fsf_req;
+ int retval = 0;
/* issue task management function */
fsf_req = zfcp_fsf_send_fcp_command_task_management
@@ -696,70 +575,63 @@ zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags)
"failed for unit 0x%016Lx on port 0x%016Lx on "
"adapter %s\n", unit->fcp_lun, unit->port->wwpn,
zfcp_get_busid_by_adapter(adapter));
+ zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
retval = -ENOMEM;
goto out;
}
- retval = zfcp_fsf_req_wait_and_cleanup(fsf_req,
- ZFCP_UNINTERRUPTIBLE, &status);
+ __wait_event(fsf_req->completion_wq,
+ fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+
/*
* check completion status of task management function
- * (status should always be valid since no signals permitted)
*/
- if (status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED)
+ if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
+ zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
retval = -EIO;
- else if (status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP)
+ } else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
+ zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
retval = -ENOTSUPP;
- else
- retval = 0;
+ } else
+ zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
+
+ zfcp_fsf_req_free(fsf_req);
out:
return retval;
}
-/*
- * function: zfcp_scsi_eh_bus_reset_handler
- *
- * purpose:
- *
- * returns:
+/**
+ * zfcp_scsi_eh_bus_reset_handler - reset bus (reopen adapter)
*/
int
zfcp_scsi_eh_bus_reset_handler(struct scsi_cmnd *scpnt)
{
- int retval = 0;
- struct zfcp_unit *unit;
+ struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata;
+ struct zfcp_adapter *adapter = unit->port->adapter;
- unit = (struct zfcp_unit *) scpnt->device->hostdata;
ZFCP_LOG_NORMAL("bus reset because of problems with "
"unit 0x%016Lx\n", unit->fcp_lun);
- zfcp_erp_adapter_reopen(unit->port->adapter, 0);
- zfcp_erp_wait(unit->port->adapter);
- retval = SUCCESS;
+ zfcp_erp_adapter_reopen(adapter, 0);
+ zfcp_erp_wait(adapter);
- return retval;
+ return SUCCESS;
}
-/*
- * function: zfcp_scsi_eh_host_reset_handler
- *
- * purpose:
- *
- * returns:
+/**
+ * zfcp_scsi_eh_host_reset_handler - reset host (reopen adapter)
*/
int
zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
{
- int retval = 0;
- struct zfcp_unit *unit;
+ struct zfcp_unit *unit = (struct zfcp_unit*) scpnt->device->hostdata;
+ struct zfcp_adapter *adapter = unit->port->adapter;
- unit = (struct zfcp_unit *) scpnt->device->hostdata;
ZFCP_LOG_NORMAL("host reset because of problems with "
"unit 0x%016Lx\n", unit->fcp_lun);
- zfcp_erp_adapter_reopen(unit->port->adapter, 0);
- zfcp_erp_wait(unit->port->adapter);
- retval = SUCCESS;
+ zfcp_erp_adapter_reopen(adapter, 0);
+ zfcp_erp_wait(adapter);
- return retval;
+ return SUCCESS;
}
/*
@@ -826,10 +698,16 @@ void
zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
{
struct Scsi_Host *shost;
+ struct zfcp_port *port;
shost = adapter->scsi_host;
if (!shost)
return;
+ read_lock_irq(&zfcp_data.config_lock);
+ list_for_each_entry(port, &adapter->port_list_head, list)
+ if (port->rport)
+ port->rport = NULL;
+ read_unlock_irq(&zfcp_data.config_lock);
fc_remove_host(shost);
scsi_remove_host(shost);
scsi_host_put(shost);
@@ -904,18 +782,6 @@ zfcp_get_node_name(struct scsi_target *starget)
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
}
-void
-zfcp_set_fc_host_attrs(struct zfcp_adapter *adapter)
-{
- struct Scsi_Host *shost = adapter->scsi_host;
-
- fc_host_node_name(shost) = adapter->wwnn;
- fc_host_port_name(shost) = adapter->wwpn;
- strncpy(fc_host_serial_number(shost), adapter->serial_number,
- min(FC_SERIAL_NUMBER_SIZE, 32));
- fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
-}
-
struct fc_function_template zfcp_transport_functions = {
.get_starget_port_id = zfcp_get_port_id,
.get_starget_port_name = zfcp_get_port_name,
@@ -927,7 +793,10 @@ struct fc_function_template zfcp_transport_functions = {
.show_host_node_name = 1,
.show_host_port_name = 1,
.show_host_supported_classes = 1,
+ .show_host_maxframe_size = 1,
.show_host_serial_number = 1,
+ .show_host_speed = 1,
+ .show_host_port_id = 1,
};
/**