iscsi_common.h

iscsi源代码 UNH的progect 有initiator端和target端的源码

	__u32 target_xfer_tag;
	__u32 rsvd3;
	__u32 exp_stat_sn;
	__u32 rsvd4;
	__u32 data_sn;
	__u32 offset;
	__u32 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_scsi_data_in {	/* Draft 20, Section 10.7 SCSI Data-in */
	__u8 opcode;
	__u8 flags;
	__u8 rsvd1;
	__u8 status;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 data_sn;
	__u32 offset;
	__u32 resid;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_r2t {		/* Draft 20, Section 10.8 Ready To Transfer (R2T) */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd2;
	__u32 length;		/* reserved */
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 r2t_sn;
	__u32 offset;
	__u32 xfer_len;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_async_msg {	/* Draft 20, Section 10.9 Asynchronous Message */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd2;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;	/* reserved 0xffffffff */
	__u32 rsvd3;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u8 async_event;
	__u8 async_vcode;
	__u16 parameter1;
	__u16 parameter2;
	__u16 parameter3;
	__u32 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_init_text_cmnd {	/* Draft 20, Section 10.10 Text Request */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd2;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 cmd_sn;
	__u32 exp_stat_sn;
	__u64 rsvd4;
	__u64 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_text_rsp {	/* Draft 20, Section 10.11 Text Response */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd2;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 rsvd4;
	__u64 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_init_login_cmnd {	/* Draft 20, Section 10.12 Login Request */
	__u8 opcode;
	__u8 flags;
	__u8 version_max;
	__u8 version_min;
	__u32 length;
	__u8 isid[6];
	__u16 tsih;
	__u32 init_task_tag;
	__u16 cid;
	__u16 rsvd1;
	__u32 cmd_sn;
	__u32 exp_stat_sn;
	__u64 rsvd2;
	__u64 rsvd3;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_login_rsp {	/* Draft 20, Section 10.13 Login Response */
	__u8 opcode;
	__u8 flags;
	__u8 version_max;
	__u8 version_active;
	__u32 length;
	__u8 isid[6];
	__u16 tsih;
	__u32 init_task_tag;
	__u32 rsvd1;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u8 status_class;
	__u8 status_detail;
	__u16 rsvd2;
	__u64 rsvd3;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_init_logout_cmnd {	/* Draft 20, Section 10.14 Logout Request */
	__u8 opcode;
	__u8 flags;		/* reasoncode */
	__u16 rsvd1;
	__u32 length;
	__u64 lun;		/* reserved */
	__u32 init_task_tag;
	__u16 cid;
	__u16 rsvd2;
	__u32 cmd_sn;
	__u32 exp_stat_sn;
	__u64 rsvd4;
	__u64 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_logout_rsp {	/* Draft 20, Section 10.15 Logout Response */
	__u8 opcode;
	__u8 flags;
	__u8 response;
	__u8 rsvd1;
	__u32 length;		/* reserved */
	__u64 lun;		/* reserved */
	__u32 init_task_tag;
	__u32 rsvd3;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 rsvd4;
	__u16 time2wait;
	__u16 time2retain;
	__u32 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

/* SNACK pdu structure definition - SAI */

struct iscsi_init_snack {	/* Draft 20, Section 10.16 SNACK Request */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd1;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 rsvd2;
	__u32 exp_stat_sn;
	__u64 rsvd3;
	__u32 begrun;
	__u32 runlen;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_rjt {		/* Draft 20, Section 10.17 Reject */
	__u8 opcode;
	__u8 flags;
	__u8 reason;
	__u8 rsvd2;
	__u32 length;
	__u64 lun;		/* reserved */
	__u32 init_task_tag;	/* reserved 0xffffffff */
	__u32 rsvd4;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 data_sn;
	__u64 rsvd5;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_init_nopout {	/* Draft 20, Section 10.18 NOP-Out */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd1;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 cmd_sn;
	__u32 exp_stat_sn;
	__u64 rsvd2;
	__u64 rsvd3;
	__u32 header_digest;	/* holds header CRC if in use */
};

struct iscsi_targ_nopin {	/* Draft 20, Section 10.19 NOP-In */
	__u8 opcode;
	__u8 flags;
	__u16 rsvd1;
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u32 rsvd2;
	__u64 rsvd3;
	__u32 header_digest;	/* holds header CRC if in use */
};

/* Used in Login negotiations */
struct generic_pdu {
	__u8 opcode;		/*  0 */
	__u8 flags;		/*  1 */
	__u8 version_max;	/*  2 */
	__u8 version_active;	/*  3 for login response PDU */
	__u32 length;		/*  4 */
	__u8 isid[6];		/*  8 */
	__u16 tsih;		/* 14 */
	__u32 init_task_tag;	/* 16 */
	__u16 CID;		/* 20 */
	__u16 rsvd1;		/* 22 */
	__u32 cmd_sn;		/* 24 */
	__u32 exp_stat_sn;	/* 28 */
	__u32 max_cmd_sn;	/* 32 */
	__u8 status_class;	/* 36 */
	__u8 status_detail;	/* 37 */
	__u16 rsvd2;		/* 38 */
	__u32 offset;		/* 40 */
	__u32 resid;		/* 44 */
	__u32 header_digest;	/* 48 holds header CRC if in use */
	__u8 *text;
	__u32 text_length;
};

/* Used in generic processing of responses */
struct response_pdu {
	__u8 opcode;
	__u8 flags;
	__u8 reason;		/* for reject PDU */
	__u8 version_active;	/* for login response PDU */
	__u32 length;
	__u64 lun;
	__u32 init_task_tag;
	__u32 target_xfer_tag;
	__u32 stat_sn;
	__u32 exp_cmd_sn;
	__u32 max_cmd_sn;
	__u8 status_class;
	__u8 status_detail;
	__u16 rsvd2;
	__u32 offset;
	__u32 xfer_len;
	__u32 header_digest;	/* holds header CRC if in use */
};

/* The format of the data returned by the SCSI REQUEST SENSE command.
 *	SCSI Primary Commands - 2 (SPC-2)
 *	ANSI Project T10/1236-D
 *	Revision 20 18 July 2001
 *	page 135
 *	7.20.1 REQUEST SENSE command introduction
 *		"Device servers shall be capable of returning 18 bytes of data
 *		in response to a REQUEST SENSE command."
 *	page 136
 *	7.20.2 Sense data format
 *		Table 102 -- Response codes 70h and 71h sense data format
 *
 *	This structure is the minimum a device can return.
 *	The file linux/drivers/scsi/scsi.h defines the maximum acceptable as:
 *		#define SCSI_SENSE_BUFFERSIZE	64
 *		unsigned char sr_sense_buffer[SCSI_SENSE_BUFFERSIZE];
 *		unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];
 */

struct scsi_sense_data {
	__u8 response;		/* sense_buffer[0] -- value f0h or f1h only */
	__u8 obsolete;		/* sense_buffer[1] */
	__u8 sense_key;		/* sense_buffer[2] -- plus FILEMARK, EOM, ILI */
	__u8 info[4];		/* sense_buffer[3-6] */
	__u8 asl;		/* sense_buffer[7] -- value 17-7 = 10 */
	__u8 cmnd_spec_info[4];	/* sense_buffer[8-11] */
	__u8 asc;		/* sense_buffer[12] */
	__u8 ascq;		/* sense_buffer[13] */
	__u8 f_r_unit_code;	/* sense_buffer[14] */
	__u8 sense_specific[3];	/* sense_buffer[15-17] */
};

/* values of connection-specific parameters used during FFP */
struct connection_operational_parameters {
	void *dummy;		/* at present, there are none we use */
};

/* values of session-wide parameters used during FFP */
struct session_operational_parameters {
	__u16 MaxConnections;	/* [1..65535] */
	__u8 InitialR2T;	/* [0,1] == [No,Yes] */
	__u8 ImmediateData;	/* [0,1] == [No,Yes] */
	__u32 MaxBurstLength;	/* [512..2**24-1] */
	__u32 FirstBurstLength;	/* [512..2**24-1] */
	__u16 DefaultTime2Wait;	/* [0..3600] */
	__u16 DefaultTime2Retain;	/* [0..3600] */
	__u16 MaxOutstandingR2T;	/* [1..65535] */
	__u8 DataPDUInOrder;	/* [0,1] == [No,Yes] */
	__u8 DataSequenceInOrder;	/* [0,1] == [No,Yes] */
	__u8 ErrorRecoveryLevel;	/* [0..2] */
	__u8 SessionType;	/* [0,1] == [Normal,Discovery] */
	__u8 TargetName;	/* number at the end of the target name */
};

#ifdef __KERNEL__

char *string_llx(__u64 x, char *str); 

void print_init_scsi_cmnd(struct iscsi_init_scsi_cmnd *cmd);

void print_targ_scsi_rsp(struct iscsi_targ_scsi_rsp *cmd);

void print_init_text_cmnd(struct iscsi_init_text_cmnd *cmd);

void print_targ_text_rsp(struct iscsi_targ_text_rsp *cmd);

void print_init_login_cmnd(struct iscsi_init_login_cmnd *cmd);

void print_targ_login_rsp(struct iscsi_targ_login_rsp *cmd);

void print_init_logout_cmnd(struct iscsi_init_logout_cmnd *cmd);

void print_targ_logout_rsp(struct iscsi_targ_logout_rsp *cmd);

void print_init_scsi_data_out(struct iscsi_init_scsi_data_out *cmd);

void print_targ_scsi_data_in(struct iscsi_targ_scsi_data_in *cmd);

void print_targ_rjt(struct iscsi_targ_rjt *cmd);

void print_init_nopout(struct iscsi_init_nopout *cmd);

void print_targ_nopin(struct iscsi_targ_nopin *cmd);

void print_targ_r2t(struct iscsi_targ_r2t *cmd);

void print_targ_async_msg(struct iscsi_targ_async_msg *cmd);

void print_init_task_mgt_command(struct iscsi_init_task_mgt_command *cmd);

void print_targ_task_mgt_response(struct iscsi_targ_task_mgt_response *cmd);

void print_init_snack(struct iscsi_init_snack *cmd);

void print_iscsi_command(void *cmd);

/*	returns pointer to printable name of SCSI op code */
/*	(Normally this is byte 1 of a SCSI CDB */
char *printable_scsi_op(__u8 opcode, char *op_buf);

/*	returns pointer to printable name of iSCSI op code, but if this is
 *	a SCSI Command, return the printable name of the SCSI op from the cdb
 */
char *printable_iscsi_op(void *cmd, char *op_buf);

/*
 * Returns 1 if any luns for this target are in use.
 * Returns 0 otherwise.
 */
extern int target_in_use(__u32 target_id);

#endif

#endif