zfcp_dbf.c

linux-2.6.15.6

				     rec->type.ct.type.request.max_res_size);
		total = rec->type.ct.payload_size;
		buffer = rec->type.ct.payload;
		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
	} else if (strncmp(rec->tag, "rctc", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "cmd_rsp_code", "0x%04x",
				     rec->type.ct.type.response.cmd_rsp_code);
		len += zfcp_dbf_view(out_buf + len, "revision", "0x%02x",
				     rec->type.ct.type.response.revision);
		len += zfcp_dbf_view(out_buf + len, "reason_code", "0x%02x",
				     rec->type.ct.type.response.reason_code);
		len +=
		    zfcp_dbf_view(out_buf + len, "reason_code_expl", "0x%02x",
				  rec->type.ct.type.response.reason_code_expl);
		len +=
		    zfcp_dbf_view(out_buf + len, "vendor_unique", "0x%02x",
				  rec->type.ct.type.response.vendor_unique);
		total = rec->type.ct.payload_size;
		buffer = rec->type.ct.payload;
		buflen = min(total, ZFCP_DBF_CT_PAYLOAD);
	} else if (strncmp(rec->tag, "oels", ZFCP_DBF_TAG_SIZE) == 0 ||
		   strncmp(rec->tag, "rels", ZFCP_DBF_TAG_SIZE) == 0 ||
		   strncmp(rec->tag, "iels", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "ls_code", "0x%02x",
				     rec->type.els.ls_code);
		total = rec->type.els.payload_size;
		buffer = rec->type.els.payload;
		buflen = min(total, ZFCP_DBF_ELS_PAYLOAD);
	}

	len += zfcp_dbf_view_dump(out_buf + len, "payload",
				  buffer, buflen, 0, total);

	if (buflen == total)
		len += sprintf(out_buf + len, "\n");

	return len;
}

struct debug_view zfcp_san_dbf_view = {
	"structured",
	NULL,
	&zfcp_dbf_view_header,
	&zfcp_san_dbf_view_format,
	NULL,
	NULL
};

static inline void
_zfcp_scsi_dbf_event_common(const char *tag, const char *tag2, int level,
			    struct zfcp_adapter *adapter,
			    struct scsi_cmnd *scsi_cmnd,
			    struct zfcp_fsf_req *new_fsf_req)
{
	struct zfcp_fsf_req *fsf_req =
	    (struct zfcp_fsf_req *)scsi_cmnd->host_scribble;
	struct zfcp_scsi_dbf_record *rec = &adapter->scsi_dbf_buf;
	struct zfcp_dbf_dump *dump = (struct zfcp_dbf_dump *)rec;
	unsigned long flags;
	struct fcp_rsp_iu *fcp_rsp;
	char *fcp_rsp_info = NULL, *fcp_sns_info = NULL;
	int offset = 0, buflen = 0;

	spin_lock_irqsave(&adapter->scsi_dbf_lock, flags);
	do {
		memset(rec, 0, sizeof(struct zfcp_scsi_dbf_record));
		if (offset == 0) {
			strncpy(rec->tag, tag, ZFCP_DBF_TAG_SIZE);
			strncpy(rec->tag2, tag2, ZFCP_DBF_TAG_SIZE);
			if (scsi_cmnd->device) {
				rec->scsi_id = scsi_cmnd->device->id;
				rec->scsi_lun = scsi_cmnd->device->lun;
			}
			rec->scsi_result = scsi_cmnd->result;
			rec->scsi_cmnd = (unsigned long)scsi_cmnd;
			rec->scsi_serial = scsi_cmnd->serial_number;
			memcpy(rec->scsi_opcode,
			       &scsi_cmnd->cmnd,
			       min((int)scsi_cmnd->cmd_len,
				   ZFCP_DBF_SCSI_OPCODE));
			rec->scsi_retries = scsi_cmnd->retries;
			rec->scsi_allowed = scsi_cmnd->allowed;
			if (fsf_req != NULL) {
				fcp_rsp = (struct fcp_rsp_iu *)
				    &(fsf_req->qtcb->bottom.io.fcp_rsp);
				fcp_rsp_info =
				    zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
				fcp_sns_info =
				    zfcp_get_fcp_sns_info_ptr(fcp_rsp);

				rec->type.fcp.rsp_validity =
				    fcp_rsp->validity.value;
				rec->type.fcp.rsp_scsi_status =
				    fcp_rsp->scsi_status;
				rec->type.fcp.rsp_resid = fcp_rsp->fcp_resid;
				if (fcp_rsp->validity.bits.fcp_rsp_len_valid)
					rec->type.fcp.rsp_code =
					    *(fcp_rsp_info + 3);
				if (fcp_rsp->validity.bits.fcp_sns_len_valid) {
					buflen = min((int)fcp_rsp->fcp_sns_len,
						     ZFCP_DBF_SCSI_MAX_FCP_SNS_INFO);
					rec->type.fcp.sns_info_len = buflen;
					memcpy(rec->type.fcp.sns_info,
					       fcp_sns_info,
					       min(buflen,
						   ZFCP_DBF_SCSI_FCP_SNS_INFO));
					offset += min(buflen,
						      ZFCP_DBF_SCSI_FCP_SNS_INFO);
				}

				rec->fsf_reqid = (unsigned long)fsf_req;
				rec->fsf_seqno = fsf_req->seq_no;
				rec->fsf_issued = fsf_req->issued;
			}
			if (new_fsf_req != NULL) {
				rec->type.new_fsf_req.fsf_reqid =
				    (unsigned long)
				    new_fsf_req;
				rec->type.new_fsf_req.fsf_seqno =
				    new_fsf_req->seq_no;
				rec->type.new_fsf_req.fsf_issued =
				    new_fsf_req->issued;
			}
		} else {
			strncpy(dump->tag, "dump", ZFCP_DBF_TAG_SIZE);
			dump->total_size = buflen;
			dump->offset = offset;
			dump->size = min(buflen - offset,
					 (int)sizeof(struct
						     zfcp_scsi_dbf_record) -
					 (int)sizeof(struct zfcp_dbf_dump));
			memcpy(dump->data, fcp_sns_info + offset, dump->size);
			offset += dump->size;
		}
		debug_event(adapter->scsi_dbf, level,
			    rec, sizeof(struct zfcp_scsi_dbf_record));
	} while (offset < buflen);
	spin_unlock_irqrestore(&adapter->scsi_dbf_lock, flags);
}

inline void
zfcp_scsi_dbf_event_result(const char *tag, int level,
			   struct zfcp_adapter *adapter,
			   struct scsi_cmnd *scsi_cmnd)
{
	_zfcp_scsi_dbf_event_common("rslt",
				    tag, level, adapter, scsi_cmnd, NULL);
}

inline void
zfcp_scsi_dbf_event_abort(const char *tag, struct zfcp_adapter *adapter,
			  struct scsi_cmnd *scsi_cmnd,
			  struct zfcp_fsf_req *new_fsf_req)
{
	_zfcp_scsi_dbf_event_common("abrt",
				    tag, 1, adapter, scsi_cmnd, new_fsf_req);
}

inline void
zfcp_scsi_dbf_event_devreset(const char *tag, u8 flag, struct zfcp_unit *unit,
			     struct scsi_cmnd *scsi_cmnd)
{
	struct zfcp_adapter *adapter = unit->port->adapter;

	_zfcp_scsi_dbf_event_common(flag == FCP_TARGET_RESET ? "trst" : "lrst",
				    tag, 1, adapter, scsi_cmnd, NULL);
}

static int
zfcp_scsi_dbf_view_format(debug_info_t * id, struct debug_view *view,
			  char *out_buf, const char *in_buf)
{
	struct zfcp_scsi_dbf_record *rec =
	    (struct zfcp_scsi_dbf_record *)in_buf;
	int len = 0;

	if (strncmp(rec->tag, "dump", ZFCP_DBF_TAG_SIZE) == 0)
		return 0;

	len += zfcp_dbf_tag(out_buf + len, "tag", rec->tag);
	len += zfcp_dbf_tag(out_buf + len, "tag2", rec->tag2);
	len += zfcp_dbf_view(out_buf + len, "scsi_id", "0x%08x", rec->scsi_id);
	len += zfcp_dbf_view(out_buf + len, "scsi_lun", "0x%08x",
			     rec->scsi_lun);
	len += zfcp_dbf_view(out_buf + len, "scsi_result", "0x%08x",
			     rec->scsi_result);
	len += zfcp_dbf_view(out_buf + len, "scsi_cmnd", "0x%0Lx",
			     rec->scsi_cmnd);
	len += zfcp_dbf_view(out_buf + len, "scsi_serial", "0x%016Lx",
			     rec->scsi_serial);
	len += zfcp_dbf_view_dump(out_buf + len, "scsi_opcode",
				  rec->scsi_opcode,
				  ZFCP_DBF_SCSI_OPCODE,
				  0, ZFCP_DBF_SCSI_OPCODE);
	len += zfcp_dbf_view(out_buf + len, "scsi_retries", "0x%02x",
			     rec->scsi_retries);
	len += zfcp_dbf_view(out_buf + len, "scsi_allowed", "0x%02x",
			     rec->scsi_allowed);
	len += zfcp_dbf_view(out_buf + len, "fsf_reqid", "0x%0Lx",
			     rec->fsf_reqid);
	len += zfcp_dbf_view(out_buf + len, "fsf_seqno", "0x%08x",
			     rec->fsf_seqno);
	len += zfcp_dbf_stck(out_buf + len, "fsf_issued", rec->fsf_issued);
	if (strncmp(rec->tag, "rslt", ZFCP_DBF_TAG_SIZE) == 0) {
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_validity", "0x%02x",
				  rec->type.fcp.rsp_validity);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_scsi_status",
				  "0x%02x", rec->type.fcp.rsp_scsi_status);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_resid", "0x%08x",
				  rec->type.fcp.rsp_resid);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_rsp_code", "0x%08x",
				  rec->type.fcp.rsp_code);
		len +=
		    zfcp_dbf_view(out_buf + len, "fcp_sns_info_len", "0x%08x",
				  rec->type.fcp.sns_info_len);
		len +=
		    zfcp_dbf_view_dump(out_buf + len, "fcp_sns_info",
				       rec->type.fcp.sns_info,
				       min((int)rec->type.fcp.sns_info_len,
					   ZFCP_DBF_SCSI_FCP_SNS_INFO), 0,
				       rec->type.fcp.sns_info_len);
	} else if (strncmp(rec->tag, "abrt", ZFCP_DBF_TAG_SIZE) == 0) {
		len += zfcp_dbf_view(out_buf + len, "fsf_reqid_abort", "0x%0Lx",
				     rec->type.new_fsf_req.fsf_reqid);
		len += zfcp_dbf_view(out_buf + len, "fsf_seqno_abort", "0x%08x",
				     rec->type.new_fsf_req.fsf_seqno);
		len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
				     rec->type.new_fsf_req.fsf_issued);
	} else if ((strncmp(rec->tag, "trst", ZFCP_DBF_TAG_SIZE) == 0) ||
		   (strncmp(rec->tag, "lrst", ZFCP_DBF_TAG_SIZE) == 0)) {
		len += zfcp_dbf_view(out_buf + len, "fsf_reqid_reset", "0x%0Lx",
				     rec->type.new_fsf_req.fsf_reqid);
		len += zfcp_dbf_view(out_buf + len, "fsf_seqno_reset", "0x%08x",
				     rec->type.new_fsf_req.fsf_seqno);
		len += zfcp_dbf_stck(out_buf + len, "fsf_issued",
				     rec->type.new_fsf_req.fsf_issued);
	}

	len += sprintf(out_buf + len, "\n");

	return len;
}

struct debug_view zfcp_scsi_dbf_view = {
	"structured",
	NULL,
	&zfcp_dbf_view_header,
	&zfcp_scsi_dbf_view_format,
	NULL,
	NULL
};

/**
 * zfcp_adapter_debug_register - registers debug feature for an adapter
 * @adapter: pointer to adapter for which debug features should be registered
 * return: -ENOMEM on error, 0 otherwise
 */
int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
{
	char dbf_name[DEBUG_MAX_NAME_LEN];

	/* debug feature area which records recovery activity */
	sprintf(dbf_name, "zfcp_%s_erp", zfcp_get_busid_by_adapter(adapter));
	adapter->erp_dbf = debug_register(dbf_name, dbfsize, 2,
					  sizeof(struct zfcp_erp_dbf_record));
	if (!adapter->erp_dbf)
		goto failed;
	debug_register_view(adapter->erp_dbf, &debug_hex_ascii_view);
	debug_set_level(adapter->erp_dbf, 3);

	/* debug feature area which records HBA (FSF and QDIO) conditions */
	sprintf(dbf_name, "zfcp_%s_hba", zfcp_get_busid_by_adapter(adapter));
	adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
					  sizeof(struct zfcp_hba_dbf_record));
	if (!adapter->hba_dbf)
		goto failed;
	debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
	debug_set_level(adapter->hba_dbf, 3);

	/* debug feature area which records SAN command failures and recovery */
	sprintf(dbf_name, "zfcp_%s_san", zfcp_get_busid_by_adapter(adapter));
	adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
					  sizeof(struct zfcp_san_dbf_record));
	if (!adapter->san_dbf)
		goto failed;
	debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
	debug_set_level(adapter->san_dbf, 6);

	/* debug feature area which records SCSI command failures and recovery */
	sprintf(dbf_name, "zfcp_%s_scsi", zfcp_get_busid_by_adapter(adapter));
	adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
					   sizeof(struct zfcp_scsi_dbf_record));
	if (!adapter->scsi_dbf)
		goto failed;
	debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
	debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
	debug_set_level(adapter->scsi_dbf, 3);

	return 0;

 failed:
	zfcp_adapter_debug_unregister(adapter);

	return -ENOMEM;
}

/**
 * zfcp_adapter_debug_unregister - unregisters debug feature for an adapter
 * @adapter: pointer to adapter for which debug features should be unregistered
 */
void zfcp_adapter_debug_unregister(struct zfcp_adapter *adapter)
{
	debug_unregister(adapter->scsi_dbf);
	debug_unregister(adapter->san_dbf);
	debug_unregister(adapter->hba_dbf);
	debug_unregister(adapter->erp_dbf);
	adapter->scsi_dbf = NULL;
	adapter->san_dbf = NULL;
	adapter->hba_dbf = NULL;
	adapter->erp_dbf = NULL;
}

#undef ZFCP_LOG_AREA