/* * Request Message Codes supported by the FC Transport
*/
/* define the class masks for the message codes */ #define FC_BSG_CLS_MASK 0xF0000000 /* find object class */ #define FC_BSG_HST_MASK 0x80000000 /* fc host class */ #define FC_BSG_RPT_MASK 0x40000000 /* fc rport class */
/* * FC Address Identifiers in Message Structures : * * Whenever a command payload contains a FC Address Identifier * (aka port_id), the value is effectively in big-endian * order, thus the array elements are decoded as follows: * element [0] is bits 23:16 of the FC Address Identifier * element [1] is bits 15:8 of the FC Address Identifier * element [2] is bits 7:0 of the FC Address Identifier
*/
/* * FC Host Messages
*/
/* FC_BSG_HST_ADDR_PORT : */
/* Request: * This message requests the FC host to login to the remote port * at the specified N_Port_Id. The remote port is to be enumerated * with the transport upon completion of the login.
*/ struct fc_bsg_host_add_rport {
__u8 reserved;
/* FC Address Identier of the remote port to login to */
__u8 port_id[3];
};
/* Response: * There is no additional response data - fc_bsg_reply->result is sufficient
*/
/* FC_BSG_HST_DEL_RPORT : */
/* Request: * This message requests the FC host to remove an enumerated * remote port and to terminate the login to it. * * Note: The driver is free to reject this request if it desires to * remain logged in with the remote port.
*/ struct fc_bsg_host_del_rport {
__u8 reserved;
/* FC Address Identier of the remote port to logout of */
__u8 port_id[3];
};
/* Response: * There is no additional response data - fc_bsg_reply->result is sufficient
*/
/* FC_BSG_HST_ELS_NOLOGIN : */
/* Request: * This message requests the FC_Host to send an ELS to a specific * N_Port_ID. The host does not need to log into the remote port, * nor does it need to enumerate the rport for further traffic * (although, the FC host is free to do so if it desires).
*/ struct fc_bsg_host_els { /* * ELS Command Code being sent (must be the same as byte 0 * of the payload)
*/
__u8 command_code;
/* FC Address Identier of the remote port to send the ELS to */
__u8 port_id[3];
};
/* Response:
*/ /* fc_bsg_ctels_reply->status values */ #define FC_CTELS_STATUS_OK 0x00000000 #define FC_CTELS_STATUS_REJECT 0x00000001 #define FC_CTELS_STATUS_P_RJT 0x00000002 #define FC_CTELS_STATUS_F_RJT 0x00000003 #define FC_CTELS_STATUS_P_BSY 0x00000004 #define FC_CTELS_STATUS_F_BSY 0x00000006 struct fc_bsg_ctels_reply { /* * Note: An ELS LS_RJT may be reported in 2 ways: * a) A status of FC_CTELS_STATUS_OK is returned. The caller * is to look into the ELS receive payload to determine * LS_ACC or LS_RJT (by contents of word 0). The reject * data will be in word 1. * b) A status of FC_CTELS_STATUS_REJECT is returned, The * rjt_data field will contain valid data. * * Note: ELS LS_ACC is determined by an FC_CTELS_STATUS_OK, and * the receive payload word 0 indicates LS_ACC * (e.g. value is 0x02xxxxxx). * * Note: Similarly, a CT Reject may be reported in 2 ways: * a) A status of FC_CTELS_STATUS_OK is returned. The caller * is to look into the CT receive payload to determine * Accept or Reject (by contents of word 2). The reject * data will be in word 3. * b) A status of FC_CTELS_STATUS_REJECT is returned, The * rjt_data field will contain valid data. * * Note: x_RJT/BSY status will indicae that the rjt_data field * is valid and contains the reason/explanation values.
*/
__u32 status; /* See FC_CTELS_STATUS_xxx */
/* valid if status is not FC_CTELS_STATUS_OK */ struct {
__u8 action; /* fragment_id for CT REJECT */
__u8 reason_code;
__u8 reason_explanation;
__u8 vendor_unique;
} rjt_data;
};
/* FC_BSG_HST_CT : */
/* Request: * This message requests that a CT Request be performed with the * indicated N_Port_ID. The driver is responsible for logging in with * the fabric and/or N_Port_ID, etc as per FC rules. This request does * not mandate that the driver must enumerate the destination in the * transport. The driver is allowed to decide whether to enumerate it, * and whether to tear it down after the request.
*/ struct fc_bsg_host_ct {
__u8 reserved;
/* FC Address Identier of the remote port to send the ELS to */
__u8 port_id[3];
/* * We need words 0-2 of the generic preamble for the LLD's
*/
__u32 preamble_word0; /* revision & IN_ID */
__u32 preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
__u32 preamble_word2; /* Cmd Code, Max Size */
}; /* Response: * * The reply structure is an fc_bsg_ctels_reply structure
*/
/* FC_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 fc_bsg_host_vendor { /* * Identifies the vendor that the message is formatted for. This * should be the recipient of the message.
*/
__u64 vendor_id;
/* start of vendor command area */
__u32 vendor_cmd[];
};
/* Response:
*/ struct fc_bsg_host_vendor_reply { /* start of vendor response area */
__DECLARE_FLEX_ARRAY(__u32, vendor_rsp);
};
/* * FC Remote Port Messages
*/
/* FC_BSG_RPT_ELS : */
/* Request: * This message requests that an ELS be performed with the rport.
*/ struct fc_bsg_rport_els { /* * ELS Command Code being sent (must be the same as * byte 0 of the payload)
*/
__u8 els_code;
};
/* Response: * * The reply structure is an fc_bsg_ctels_reply structure
*/
/* FC_BSG_RPT_CT : */
/* Request: * This message requests that a CT Request be performed with the rport.
*/ struct fc_bsg_rport_ct { /* * We need words 0-2 of the generic preamble for the LLD's
*/
__u32 preamble_word0; /* revision & IN_ID */
__u32 preamble_word1; /* GS_Type, GS_SubType, Options, Rsvd */
__u32 preamble_word2; /* Cmd Code, Max Size */
}; /* Response: * * The reply structure is an fc_bsg_ctels_reply structure
*/
/* request (CDB) structure of the sg_io_v4 */ struct fc_bsg_request {
__u32 msgcode; union { struct fc_bsg_host_add_rport h_addrport; struct fc_bsg_host_del_rport h_delrport; struct fc_bsg_host_els h_els; struct fc_bsg_host_ct h_ct; struct fc_bsg_host_vendor h_vendor;
/* response (request sense data) structure of the sg_io_v4 */ struct fc_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.
*/
__u32 result;
/* If there was reply_payload, how much was recevied ? */
__u32 reply_payload_rcv_len;
union { struct fc_bsg_host_vendor_reply vendor_reply;
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