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Initial import of libiscsi

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This commit is contained in:
Ronnie Sahlberg
2010-12-05 08:24:57 +11:00
commit 098bc5a9a7
23 changed files with 5742 additions and 0 deletions
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include/iscsi-private.h Normal file
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/*
Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 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 Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#ifndef discard_const
#define discard_const(ptr) ((void *)((intptr_t)(ptr)))
#endif
struct iscsi_context {
const char *initiator_name;
const char *target_name;
const char *alias;
enum iscsi_session_type session_type;
unsigned char isid[6];
uint32_t itt;
uint32_t cmdsn;
uint32_t statsn;
enum iscsi_header_digest want_header_digest;
enum iscsi_header_digest header_digest;
char *error_string;
int fd;
int is_connected;
int is_loggedin;
iscsi_command_cb socket_status_cb;
void *connect_data;
struct iscsi_pdu *outqueue;
struct iscsi_pdu *waitpdu;
int insize;
int inpos;
unsigned char *inbuf;
};
#define ISCSI_RAW_HEADER_SIZE 48
#define ISCSI_HEADER_SIZE (ISCSI_RAW_HEADER_SIZE \
+ (iscsi->header_digest == ISCSI_HEADER_DIGEST_NONE?0:4))
#define ISCSI_PDU_IMMEDIATE 0x40
#define ISCSI_PDU_TEXT_FINAL 0x80
#define ISCSI_PDU_TEXT_CONTINUE 0x40
#define ISCSI_PDU_LOGIN_TRANSIT 0x80
#define ISCSI_PDU_LOGIN_CONTINUE 0x40
#define ISCSI_PDU_LOGIN_CSG_SECNEG 0x00
#define ISCSI_PDU_LOGIN_CSG_OPNEG 0x04
#define ISCSI_PDU_LOGIN_CSG_FF 0x0c
#define ISCSI_PDU_LOGIN_NSG_SECNEG 0x00
#define ISCSI_PDU_LOGIN_NSG_OPNEG 0x01
#define ISCSI_PDU_LOGIN_NSG_FF 0x03
#define ISCSI_PDU_SCSI_FINAL 0x80
#define ISCSI_PDU_SCSI_READ 0x40
#define ISCSI_PDU_SCSI_WRITE 0x20
#define ISCSI_PDU_SCSI_ATTR_UNTAGGED 0x00
#define ISCSI_PDU_SCSI_ATTR_SIMPLE 0x01
#define ISCSI_PDU_SCSI_ATTR_ORDERED 0x02
#define ISCSI_PDU_SCSI_ATTR_HEADOFQUEUE 0x03
#define ISCSI_PDU_SCSI_ATTR_ACA 0x04
#define ISCSI_PDU_DATA_FINAL 0x80
#define ISCSI_PDU_DATA_ACK_REQUESTED 0x40
#define ISCSI_PDU_DATA_BIDIR_OVERFLOW 0x10
#define ISCSI_PDU_DATA_BIDIR_UNDERFLOW 0x08
#define ISCSI_PDU_DATA_RESIDUAL_OVERFLOW 0x04
#define ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW 0x02
#define ISCSI_PDU_DATA_CONTAINS_STATUS 0x01
enum iscsi_opcode {
ISCSI_PDU_NOP_OUT = 0x00,
ISCSI_PDU_SCSI_REQUEST = 0x01,
ISCSI_PDU_LOGIN_REQUEST = 0x03,
ISCSI_PDU_TEXT_REQUEST = 0x04,
ISCSI_PDU_LOGOUT_REQUEST = 0x06,
ISCSI_PDU_NOP_IN = 0x20,
ISCSI_PDU_SCSI_RESPONSE = 0x21,
ISCSI_PDU_LOGIN_RESPONSE = 0x23,
ISCSI_PDU_TEXT_RESPONSE = 0x24,
ISCSI_PDU_DATA_IN = 0x25,
ISCSI_PDU_LOGOUT_RESPONSE = 0x26
};
struct iscsi_pdu {
struct iscsi_pdu *next;
uint32_t itt;
uint32_t cmdsn;
enum iscsi_opcode response_opcode;
iscsi_command_cb callback;
void *private_data;
int written;
struct iscsi_data outdata;
struct iscsi_data indata;
struct iscsi_scsi_cbdata *scsi_cbdata;
};
void iscsi_free_scsi_cbdata(struct iscsi_scsi_cbdata *scsi_cbdata);
struct iscsi_pdu *iscsi_allocate_pdu(struct iscsi_context *iscsi,
enum iscsi_opcode opcode,
enum iscsi_opcode response_opcode);
void iscsi_free_pdu(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);
void iscsi_pdu_set_pduflags(struct iscsi_pdu *pdu, unsigned char flags);
void iscsi_pdu_set_immediate(struct iscsi_pdu *pdu);
void iscsi_pdu_set_ttt(struct iscsi_pdu *pdu, uint32_t ttt);
void iscsi_pdu_set_cmdsn(struct iscsi_pdu *pdu, uint32_t cmdsn);
void iscsi_pdu_set_lun(struct iscsi_pdu *pdu, uint32_t lun);
void iscsi_pdu_set_expstatsn(struct iscsi_pdu *pdu, uint32_t expstatsnsn);
void iscsi_pdu_set_expxferlen(struct iscsi_pdu *pdu, uint32_t expxferlen);
int iscsi_pdu_add_data(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
unsigned char *dptr, int dsize);
int iscsi_queue_pdu(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);
int iscsi_add_data(struct iscsi_context *iscsi, struct iscsi_data *data,
unsigned char *dptr, int dsize, int pdualignment);
struct scsi_task;
void iscsi_pdu_set_cdb(struct iscsi_pdu *pdu, struct scsi_task *task);
int iscsi_get_pdu_size(struct iscsi_context *iscsi, const unsigned char *hdr);
int iscsi_process_pdu(struct iscsi_context *iscsi, const unsigned char *hdr,
int size);
int iscsi_process_login_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size);
int iscsi_process_text_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size);
int iscsi_process_logout_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size);
int iscsi_process_scsi_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size);
int iscsi_process_scsi_data_in(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size,
int *is_finished);
int iscsi_process_nop_out_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
const unsigned char *hdr, int size);
void iscsi_set_error(struct iscsi_context *iscsi, const char *error_string,
...);
unsigned long crc32c(char *buf, int len);
void iscsi_cbdata_steal_scsi_task(struct scsi_task *task);