diff options
Diffstat (limited to 'kernel/include/scsi/scsi_bsg_iscsi.h')
| -rw-r--r-- | kernel/include/scsi/scsi_bsg_iscsi.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/kernel/include/scsi/scsi_bsg_iscsi.h b/kernel/include/scsi/scsi_bsg_iscsi.h new file mode 100644 index 000000000..fd5689d4c --- /dev/null +++ b/kernel/include/scsi/scsi_bsg_iscsi.h @@ -0,0 +1,110 @@ +/* + * iSCSI Transport BSG Interface + * + * Copyright (C) 2009 James Smart, Emulex Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef SCSI_BSG_ISCSI_H +#define SCSI_BSG_ISCSI_H + +/* + * This file intended to be included by both kernel and user space + */ + +#include <scsi/scsi.h> + +/* + * iSCSI Transport SGIO v4 BSG Message Support + */ + +/* Default BSG request timeout (in seconds) */ +#define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ) + + +/* + * Request Message Codes supported by the iSCSI Transport + */ + +/* define the class masks for the message codes */ +#define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */ +#define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */ + +/* iscsi host Message Codes */ +#define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF) + + +/* + * iSCSI Host Messages + */ + +/* ISCSI_BSG_HST_VENDOR : */ + +/* Request: + * Note: When specifying vendor_id, be sure to read the Vendor Type and ID + * formatting requirements specified in scsi_netlink.h + */ +struct iscsi_bsg_host_vendor { + /* + * Identifies the vendor that the message is formatted for. This + * should be the recipient of the message. + */ + uint64_t vendor_id; + + /* start of vendor command area */ + uint32_t vendor_cmd[0]; +}; + +/* Response: + */ +struct iscsi_bsg_host_vendor_reply { + /* start of vendor response area */ + uint32_t vendor_rsp[0]; +}; + + +/* request (CDB) structure of the sg_io_v4 */ +struct iscsi_bsg_request { + uint32_t msgcode; + union { + struct iscsi_bsg_host_vendor h_vendor; + } rqst_data; +} __attribute__((packed)); + + +/* response (request sense data) structure of the sg_io_v4 */ +struct iscsi_bsg_reply { + /* + * The completion result. Result exists in two forms: + * if negative, it is an -Exxx system errno value. There will + * be no further reply information supplied. + * else, it's the 4-byte scsi error result, with driver, host, + * msg and status fields. The per-msgcode reply structure + * will contain valid data. + */ + uint32_t result; + + /* If there was reply_payload, how much was recevied ? */ + uint32_t reply_payload_rcv_len; + + union { + struct iscsi_bsg_host_vendor_reply vendor_reply; + } reply_data; +}; + + +#endif /* SCSI_BSG_ISCSI_H */ |