iscsi: new module from Ronnie.

[ccan] / ccan / iscsi / iscsi-private.h

diff --git a/ccan/iscsi/iscsi-private.h b/ccan/iscsi/iscsi-private.h
new file mode 100644 (file)
index 0000000..8c95b4d
--- /dev/null
+++ b/ccan/iscsi/iscsi-private.h
@@ -0,0 +1,143 @@
+/* 
+   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 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 General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+
+#ifndef _U_
+#define _U_
+#endif
+
+#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;
+
+       int fd;
+       int is_connected;
+       int is_loggedin;
+
+       iscsi_command_cb connect_cb;
+       void *connect_data;
+
+       struct iscsi_pdu *outqueue;
+       struct iscsi_pdu *waitpdu;
+
+       int insize;
+       int inpos;
+       unsigned char *inbuf;
+};
+
+#define ISCSI_HEADER_SIZE                      48
+
+#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 *prev, *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_data *data, unsigned char *dptr, int dsize, int pdualignment);
+int iscsi_set_random_isid(struct iscsi_context *iscsi);
+
+struct scsi_task;
+void iscsi_pdu_set_cdb(struct iscsi_pdu *pdu, struct scsi_task *task);
+
+int iscsi_get_pdu_size(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);