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Diffstat (limited to 'src/include/gpxe/srp.h')
| -rw-r--r-- | src/include/gpxe/srp.h | 874 |
1 files changed, 874 insertions, 0 deletions
diff --git a/src/include/gpxe/srp.h b/src/include/gpxe/srp.h new file mode 100644 index 00000000..75ec7b83 --- /dev/null +++ b/src/include/gpxe/srp.h @@ -0,0 +1,874 @@ +#ifndef _GPXE_SRP_H +#define _GPXE_SRP_H + +/** @file + * + * SCSI RDMA Protocol + * + */ + +FILE_LICENCE ( BSD2 ); + +#include <stdint.h> +#include <byteswap.h> +#include <gpxe/iobuf.h> +#include <gpxe/xfer.h> +#include <gpxe/scsi.h> + +/***************************************************************************** + * + * Common fields + * + ***************************************************************************** + */ + +/** An SRP information unit tag */ +struct srp_tag { + uint32_t dwords[2]; +} __attribute__ (( packed )); + +/** An SRP port ID */ +struct srp_port_id { + uint8_t bytes[16]; +} __attribute__ (( packed )); + +/** An SRP port ID pair */ +struct srp_port_ids { + /** Initiator port ID */ + struct srp_port_id initiator; + /** Target port ID */ + struct srp_port_id target; +} __attribute__ (( packed )); + +/** SRP information unit common fields */ +struct srp_common { + /** Information unit type */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[7]; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/***************************************************************************** + * + * Login request + * + ***************************************************************************** + */ + +/** An SRP login request information unit */ +struct srp_login_req { + /** Information unit type + * + * This must be @c SRP_LOGIN_REQ + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[7]; + /** Tag */ + struct srp_tag tag; + /** Requested maximum initiator to target IU length */ + uint32_t max_i_t_iu_len; + /** Reserved */ + uint8_t reserved1[4]; + /** Required buffer formats + * + * This is the bitwise OR of one or more @c + * SRP_LOGIN_REQ_FMT_XXX constants. + */ + uint16_t required_buffer_formats; + /** Flags + * + * This is the bitwise OR of zero or more @c + * SRP_LOGIN_REQ_FLAG_XXX and @c SRP_LOGIN_REQ_MCA_XXX + * constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved2[5]; + /** Initiator and target port identifiers */ + struct srp_port_ids port_ids; +} __attribute__ (( packed )); + +/** Type of an SRP login request */ +#define SRP_LOGIN_REQ 0x00 + +/** Require indirect data buffer descriptor format */ +#define SRP_LOGIN_REQ_FMT_IDBD 0x04 + +/** Require direct data buffer descriptor format */ +#define SRP_LOGIN_REQ_FMT_DDBD 0x02 + +/** Use solicited notification for asynchronous events */ +#define SRP_LOGIN_REQ_FLAG_AESOLNT 0x40 + +/** Use solicited notification for credit request */ +#define SRP_LOGIN_REQ_FLAG_CRSOLNT 0x20 + +/** Use solicited notification for logouts */ +#define SRP_LOGIN_REQ_FLAG_LOSOLNT 0x10 + +/** Multi-channel action mask */ +#define SRP_LOGIN_REQ_MCA_MASK 0x03 + +/** Single RDMA channel operation */ +#define SRP_LOGIN_REQ_MCA_SINGLE_CHANNEL 0x00 + +/** Multiple independent RDMA channel operation */ +#define SRP_LOGIN_REQ_MCA_MULTIPLE_CHANNELS 0x01 + +/***************************************************************************** + * + * Login response + * + ***************************************************************************** + */ + +/** An SRP login response */ +struct srp_login_rsp { + /** Information unit type + * + * This must be @c SRP_LOGIN_RSP + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[3]; + /** Request limit delta */ + uint32_t request_limit_delta; + /** Tag */ + struct srp_tag tag; + /** Maximum initiator to target IU length */ + uint32_t max_i_t_iu_len; + /** Maximum target to initiator IU length */ + uint32_t max_t_i_iu_len; + /** Supported buffer formats + * + * This is the bitwise OR of one or more @c + * SRP_LOGIN_RSP_FMT_XXX constants. + */ + uint16_t supported_buffer_formats; + /** Flags + * + * This is the bitwise OR of zero or more @c + * SRP_LOGIN_RSP_FLAG_XXX and @c SRP_LOGIN_RSP_MCR_XXX + * constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved1[25]; +} __attribute__ (( packed )); + +/** Type of an SRP login response */ +#define SRP_LOGIN_RSP 0xc0 + +/** Indirect data buffer descriptor format supported */ +#define SRP_LOGIN_RSP_FMT_IDBD 0x04 + +/** Direct data buffer descriptor format supported */ +#define SRP_LOGIN_RSP_FMT_DDBD 0x02 + +/** Solicited notification is supported */ +#define SRP_LOGIN_RSP_FLAG_SOLNTSUP 0x10 + +/** Multi-channel result mask */ +#define SRP_LOGIN_RSP_MCR_MASK 0x03 + +/** No existing RDMA channels were associated with the same I_T nexus */ +#define SRP_LOGIN_RSP_MCR_NO_EXISTING_CHANNELS 0x00 + +/** One or more existing RDMA channels were terminated */ +#define SRP_LOGIN_RSP_MCR_EXISTING_CHANNELS_TERMINATED 0x01 + +/** One or more existing RDMA channels continue to operate independently */ +#define SRP_LOGIN_RSP_MCR_EXISTING_CHANNELS_CONTINUE 0x02 + +/***************************************************************************** + * + * Login rejection + * + ***************************************************************************** + */ + +/** An SRP login rejection */ +struct srp_login_rej { + /** Information unit type + * + * This must be @c SRP_LOGIN_REJ + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[3]; + /** Reason + * + * This is a @c SRP_LOGIN_REJ_REASON_XXX constant. + */ + uint32_t reason; + /** Tag */ + struct srp_tag tag; + /** Reserved */ + uint8_t reserved1[8]; + /** Supported buffer formats + * + * This is the bitwise OR of one or more @c + * SRP_LOGIN_REJ_FMT_XXX constants. + */ + uint16_t supported_buffer_formats; + /** Reserved */ + uint8_t reserved2[6]; +} __attribute__ (( packed )); + +/** Type of an SRP login rejection */ +#define SRP_LOGIN_REJ 0xc2 + +/** Unable to establish RDMA channel, no reason specified */ +#define SRP_LOGIN_REJ_REASON_UNKNOWN 0x00010000UL + +/** Insufficient RDMA channel resources */ +#define SRP_LOGIN_REJ_REASON_INSUFFICIENT_RESOURCES 0x00010001UL + +/** Requested maximum initiator to target IU length value too large */ +#define SRP_LOGIN_REJ_REASON_BAD_MAX_I_T_IU_LEN 0x00010002UL + +/** Unable to associate RDMA channel with specified I_T nexus */ +#define SRP_LOGIN_REJ_REASON_CANNOT_ASSOCIATE 0x00010003UL + +/** One or more requested data buffer descriptor formats are not supported */ +#define SRP_LOGIN_REJ_REASON_UNSUPPORTED_BUFFER_FORMAT 0x00010004UL + +/** SRP target port does not support multiple RDMA channels per I_T nexus */ +#define SRP_LOGIN_REJ_REASON_NO_MULTIPLE_CHANNELS 0x00010005UL + +/** RDMA channel limit reached for this initiator */ +#define SRP_LOGIN_REJ_REASON_NO_MORE_CHANNELS 0x00010006UL + +/** Indirect data buffer descriptor format supported */ +#define SRP_LOGIN_REJ_FMT_IDBD 0x04 + +/** Direct data buffer descriptor format supported */ +#define SRP_LOGIN_REJ_FMT_DDBD 0x02 + +/***************************************************************************** + * + * Initiator logout + * + ***************************************************************************** + */ + +/** An SRP initiator logout request */ +struct srp_i_logout { + /** Information unit type + * + * This must be @c SRP_I_LOGOUT + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[7]; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/** Type of an SRP initiator logout request */ +#define SRP_I_LOGOUT 0x03 + +/***************************************************************************** + * + * Target logout + * + ***************************************************************************** + */ + +/** An SRP target logout request */ +struct srp_t_logout { + /** Information unit type + * + * This must be @c SRP_T_LOGOUT + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more @c + * SRP_T_LOGOUT_FLAG_XXX constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[2]; + /** Reason + * + * This is a @c SRP_T_LOGOUT_REASON_XXX constant. + */ + uint32_t reason; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/** Type of an SRP target logout request */ +#define SRP_T_LOGOUT 0x80 + +/** The initiator specified solicited notification of logouts */ +#define SRP_T_LOGOUT_FLAG_SOLNT 0x01 + +/** No reason specified */ +#define SRP_T_LOGOUT_REASON_UNKNOWN 0x00000000UL + +/** Inactive RDMA channel (reclaiming resources) */ +#define SRP_T_LOGOUT_REASON_INACTIVE 0x00000001UL + +/** Invalid information unit type code received by SRP target port */ +#define SRP_T_LOGOUT_REASON_INVALID_TYPE 0x00000002UL + +/** SRP initiator port sent response with no corresponding request */ +#define SRP_T_LOGOUT_REASON_SPURIOUS_RESPONSE 0x00000003UL + +/** RDMA channel disconnected due to multi-channel action code in new login */ +#define SRP_T_LOGOUT_REASON_MCA 0x00000004UL + +/** Unsuppported format code value specified in data-out buffer descriptor */ +#define SRP_T_LOGOUT_UNSUPPORTED_DATA_OUT_FORMAT 0x00000005UL + +/** Unsuppported format code value specified in data-in buffer descriptor */ +#define SRP_T_LOGOUT_UNSUPPORTED_DATA_IN_FORMAT 0x00000006UL + +/** Invalid length for IU type */ +#define SRP_T_LOGOUT_INVALID_IU_LEN 0x00000008UL + +/***************************************************************************** + * + * Task management + * + ***************************************************************************** + */ + +/** An SRP task management request */ +struct srp_tsk_mgmt { + /** Information unit type + * + * This must be @c SRP_TSK_MGMT + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more + * @c SRP_TSK_MGMT_FLAG_XXX constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[6]; + /** Tag */ + struct srp_tag tag; + /** Reserved */ + uint8_t reserved1[4]; + /** Logical unit number */ + struct scsi_lun lun; + /** Reserved */ + uint8_t reserved2[2]; + /** Task management function + * + * This is a @c SRP_TASK_MGMT_FUNC_XXX constant + */ + uint8_t function; + /** Reserved */ + uint8_t reserved3[1]; + /** Tag of task to be managed */ + struct srp_tag managed_tag; + /** Reserved */ + uint8_t reserved4[8]; +} __attribute__ (( packed )); + +/** Type of an SRP task management request */ +#define SRP_TSK_MGMT 0x01 + +/** Use solicited notification for unsuccessful completions */ +#define SRP_TSK_MGMT_FLAG_UCSOLNT 0x04 + +/** Use solicited notification for successful completions */ +#define SRP_TSK_MGMT_FLAG_SCSOLNT 0x02 + +/** The task manager shall perform an ABORT TASK function */ +#define SRP_TSK_MGMT_FUNC_ABORT_TASK 0x01 + +/** The task manager shall perform an ABORT TASK SET function */ +#define SRP_TSK_MGMT_FUNC_ABORT_TASK_SET 0x02 + +/** The task manager shall perform a CLEAR TASK SET function */ +#define SRP_TSK_MGMT_FUNC_CLEAR_TASK_SET 0x04 + +/** The task manager shall perform a LOGICAL UNIT RESET function */ +#define SRP_TSK_MGMT_FUNC_LOGICAL_UNIT_RESET 0x08 + +/** The task manager shall perform a CLEAR ACA function */ +#define SRP_TSK_MGMT_FUNC_CLEAR_ACA 0x40 + +/***************************************************************************** + * + * SCSI command + * + ***************************************************************************** + */ + +/** An SRP SCSI command */ +struct srp_cmd { + /** Information unit type + * + * This must be @c SRP_CMD + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more @c SRP_CMD_FLAG_XXX + * constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[3]; + /** Data buffer descriptor formats + * + * This is the bitwise OR of one @c SRP_CMD_DO_FMT_XXX and one @c + * SRP_CMD_DI_FMT_XXX constant. + */ + uint8_t data_buffer_formats; + /** Data-out buffer descriptor count */ + uint8_t data_out_buffer_count; + /** Data-in buffer descriptor count */ + uint8_t data_in_buffer_count; + /** Tag */ + struct srp_tag tag; + /** Reserved */ + uint8_t reserved1[4]; + /** Logical unit number */ + struct scsi_lun lun; + /** Reserved */ + uint8_t reserved2[1]; + /** Task attribute + * + * This is a @c SRP_CMD_TASK_ATTR_XXX constant. + */ + uint8_t task_attr; + /** Reserved */ + uint8_t reserved3[1]; + /** Additional CDB length */ + uint8_t additional_cdb_len; + /** Command data block */ + union scsi_cdb cdb; +} __attribute__ (( packed )); + +/** Type of an SRP SCSI command */ +#define SRP_CMD 0x02 + +/** Use solicited notification for unsuccessful completions */ +#define SRP_CMD_FLAG_UCSOLNT 0x04 + +/** Use solicited notification for successful completions */ +#define SRP_CMD_FLAG_SCSOLNT 0x02 + +/** Data-out buffer format mask */ +#define SRP_CMD_DO_FMT_MASK 0xf0 + +/** Direct data-out buffer format */ +#define SRP_CMD_DO_FMT_DIRECT 0x10 + +/** Indirect data-out buffer format */ +#define SRP_CMD_DO_FMT_INDIRECT 0x20 + +/** Data-in buffer format mask */ +#define SRP_CMD_DI_FMT_MASK 0x0f + +/** Direct data-in buffer format */ +#define SRP_CMD_DI_FMT_DIRECT 0x01 + +/** Indirect data-in buffer format */ +#define SRP_CMD_DI_FMT_INDIRECT 0x02 + +/** Use the rules for a simple task attribute */ +#define SRP_CMD_TASK_ATTR_SIMPLE 0x00 + +/** Use the rules for a head of queue task attribute */ +#define SRP_CMD_TASK_ATTR_QUEUE_HEAD 0x01 + +/** Use the rules for an ordered task attribute */ +#define SRP_CMD_TASK_ATTR_ORDERED 0x02 + +/** Use the rules for an automatic contingent allegiance task attribute */ +#define SRP_CMD_TASK_ATTR_AUTOMATIC_CONTINGENT_ALLEGIANCE 0x08 + +/** An SRP memory descriptor */ +struct srp_memory_descriptor { + /** Virtual address */ + uint64_t address; + /** Memory handle */ + uint32_t handle; + /** Data length */ + uint32_t len; +} __attribute__ (( packed )); + +/***************************************************************************** + * + * SCSI response + * + ***************************************************************************** + */ + +/** An SRP SCSI response */ +struct srp_rsp { + /** Information unit type + * + * This must be @c SRP_RSP + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more @c SRP_RSP_FLAG_XXX + * constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[2]; + /** Request limit delta */ + uint32_t request_limit_delta; + /** Tag */ + struct srp_tag tag; + /** Reserved */ + uint8_t reserved1[2]; + /** Valid fields + * + * This is the bitwise OR of zero or more @c SRP_RSP_VALID_XXX + * constants. + */ + uint8_t valid; + /** Status + * + * This is the SCSI status code. + */ + uint8_t status; + /** Data-out residual count */ + uint32_t data_out_residual_count; + /** Data-in residual count */ + uint32_t data_in_residual_count; + /** Sense data list length */ + uint32_t sense_data_len; + /** Response data list length */ + uint32_t response_data_len; +} __attribute__ (( packed )); + +/** Type of an SRP SCSI response */ +#define SRP_RSP 0xc1 + +/** The initiator specified solicited notification of this response */ +#define SRP_RSP_FLAG_SOLNT 0x01 + +/** Data-in residual count field is valid and represents an underflow */ +#define SRP_RSP_VALID_DIUNDER 0x20 + +/** Data-in residual count field is valid and represents an overflow */ +#define SRP_RSP_VALID_DIOVER 0x10 + +/** Data-out residual count field is valid and represents an underflow */ +#define SRP_RSP_VALID_DOUNDER 0x08 + +/** Data-out residual count field is valid and represents an overflow */ +#define SRP_RSP_VALID_DOOVER 0x04 + +/** Sense data list length field is valid */ +#define SRP_RSP_VALID_SNSVALID 0x02 + +/** Response data list length field is valid */ +#define SRP_RSP_VALID_RSPVALID 0x01 + +/** + * Get response data portion of SCSI response + * + * @v rsp SCSI response + * @ret response_data Response data, or NULL if not present + */ +static inline void * srp_rsp_response_data ( struct srp_rsp *rsp ) { + return ( ( rsp->valid & SRP_RSP_VALID_RSPVALID ) ? + ( ( ( void * ) rsp ) + sizeof ( *rsp ) ) : NULL ); +} + +/** + * Get length of response data portion of SCSI response + * + * @v rsp SCSI response + * @ret response_data_len Response data length + */ +static inline size_t srp_rsp_response_data_len ( struct srp_rsp *rsp ) { + return ( ( rsp->valid & SRP_RSP_VALID_RSPVALID ) ? + ntohl ( rsp->response_data_len ) : 0 ); +} + +/** + * Get sense data portion of SCSI response + * + * @v rsp SCSI response + * @ret sense_data Sense data, or NULL if not present + */ +static inline void * srp_rsp_sense_data ( struct srp_rsp *rsp ) { + return ( ( rsp->valid & SRP_RSP_VALID_SNSVALID ) ? + ( ( ( void * ) rsp ) + sizeof ( *rsp ) + + srp_rsp_response_data_len ( rsp ) ) : NULL ); +} + +/** + * Get length of sense data portion of SCSI response + * + * @v rsp SCSI response + * @ret sense_data_len Sense data length + */ +static inline size_t srp_rsp_sense_data_len ( struct srp_rsp *rsp ) { + return ( ( rsp->valid & SRP_RSP_VALID_SNSVALID ) ? + ntohl ( rsp->sense_data_len ) : 0 ); +} + +/***************************************************************************** + * + * Credit request + * + ***************************************************************************** + */ + +/** An SRP credit request */ +struct srp_cred_req { + /** Information unit type + * + * This must be @c SRP_CRED_REQ + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more + * @c SRP_CRED_REQ_FLAG_XXX constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[2]; + /** Request limit delta */ + uint32_t request_limit_delta; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/** Type of an SRP credit request */ +#define SRP_CRED_REQ 0x81 + +/** The initiator specified solicited notification of credit requests */ +#define SRP_CRED_REQ_FLAG_SOLNT 0x01 + +/***************************************************************************** + * + * Credit response + * + ***************************************************************************** + */ + +/** An SRP credit response */ +struct srp_cred_rsp { + /** Information unit type + * + * This must be @c SRP_CRED_RSP + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[7]; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/** Type of an SRP credit response */ +#define SRP_CRED_RSP 0x41 + +/***************************************************************************** + * + * Asynchronous event request + * + ***************************************************************************** + */ + +/** An SRP asynchronous event request */ +struct srp_aer_req { + /** Information unit type + * + * This must be @c SRP_AER_REQ + */ + uint8_t type; + /** Flags + * + * This is the bitwise OR of zero or more @c + * SRP_AER_REQ_FLAG_XXX constants. + */ + uint8_t flags; + /** Reserved */ + uint8_t reserved0[2]; + /** Request limit delta */ + uint32_t request_limit_delta; + /** Tag */ + struct srp_tag tag; + /** Reserved */ + uint8_t reserved1[4]; + /** Logical unit number */ + struct scsi_lun lun; + /** Sense data list length */ + uint32_t sense_data_len; + /** Reserved */ + uint8_t reserved2[4]; +} __attribute__ (( packed )); + +/** Type of an SRP asynchronous event request */ +#define SRP_AER_REQ 0x82 + +/** The initiator specified solicited notification of asynchronous events */ +#define SRP_AER_REQ_FLAG_SOLNT 0x01 + +/** + * Get sense data portion of asynchronous event request + * + * @v aer_req SRP asynchronous event request + * @ret sense_data Sense data + */ +static inline __always_inline void * +srp_aer_req_sense_data ( struct srp_aer_req *aer_req ) { + return ( ( ( void * ) aer_req ) + sizeof ( *aer_req ) ); +} + +/** + * Get length of sense data portion of asynchronous event request + * + * @v aer_req SRP asynchronous event request + * @ret sense_data_len Sense data length + */ +static inline __always_inline size_t +srp_aer_req_sense_data_len ( struct srp_aer_req *aer_req ) { + return ( ntohl ( aer_req->sense_data_len ) ); +} + +/***************************************************************************** + * + * Asynchronous event response + * + ***************************************************************************** + */ + +/** An SRP asynchronous event response */ +struct srp_aer_rsp { + /** Information unit type + * + * This must be @c SRP_AER_RSP + */ + uint8_t type; + /** Reserved */ + uint8_t reserved0[7]; + /** Tag */ + struct srp_tag tag; +} __attribute__ (( packed )); + +/** Type of an SRP asynchronous event response */ +#define SRP_AER_RSP 0x42 + +/***************************************************************************** + * + * Information units + * + ***************************************************************************** + */ + +/** Maximum length of any initiator-to-target IU that we will send + * + * The longest IU is a SRP_CMD with no additional CDB and two direct + * data buffer descriptors, which comes to 80 bytes. + */ +#define SRP_MAX_I_T_IU_LEN 80 + +/***************************************************************************** + * + * SRP device + * + ***************************************************************************** + */ + +struct srp_device; + +/** An SRP transport type */ +struct srp_transport_type { + /** Length of transport private data */ + size_t priv_len; + /** Parse root path + * + * @v srp SRP device + * @v root_path Root path + * @ret Return status code + */ + int ( * parse_root_path ) ( struct srp_device *srp, + const char *root_path ); + /** Connect SRP session + * + * @v srp SRP device + * @ret rc Return status code + * + * This method should open the underlying socket. + */ + int ( * connect ) ( struct srp_device *srp ); +}; + +/** An SRP device */ +struct srp_device { + /** Reference count */ + struct refcnt refcnt; + + /** Initiator and target port IDs */ + struct srp_port_ids port_ids; + /** Logical unit number */ + struct scsi_lun lun; + /** Memory handle */ + uint32_t memory_handle; + + /** Current state + * + * This is the bitwise-OR of zero or more @c SRP_STATE_XXX + * flags. + */ + unsigned int state; + /** Retry counter */ + unsigned int retry_count; + /** Instant return status code + * + * Used to avoid retrying the connection on every new SCSI + * command after the retry count has been exceeded. + */ + int instant_rc; + /** Current SCSI command */ + struct scsi_command *command; + + /** Underlying data transfer interface */ + struct xfer_interface socket; + + /** Transport type */ + struct srp_transport_type *transport; + /** Transport private data */ + char transport_priv[0]; +}; + +/** + * Get SRP transport private data + * + * @v srp SRP device + * @ret priv SRP transport private data + */ +static inline __always_inline void * +srp_transport_priv ( struct srp_device *srp ) { + return ( ( void * ) srp->transport_priv ); +} + +/** SRP state flags */ +enum srp_state { + /** Underlying socket is open */ + SRP_STATE_SOCKET_OPEN = 0x0001, + /** Session is logged in */ + SRP_STATE_LOGGED_IN = 0x0002, +}; + +/** Maximum number of SRP retry attempts */ +#define SRP_MAX_RETRIES 3 + +extern int srp_attach ( struct scsi_device *scsi, const char *root_path ); +extern void srp_detach ( struct scsi_device *scsi ); + +#endif /* _GPXE_SRP_H */ |