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Diffstat (limited to 'include/scsi/iscsi_proto.h')
-rw-r--r--include/scsi/iscsi_proto.h161
1 files changed, 120 insertions, 41 deletions
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
index 4feda05fdf2..c1260d80ef3 100644
--- a/include/scsi/iscsi_proto.h
+++ b/include/scsi/iscsi_proto.h
@@ -21,15 +21,46 @@
#ifndef ISCSI_PROTO_H
#define ISCSI_PROTO_H
-#define ISCSI_VERSION_STR "0.3"
-#define ISCSI_DATE_STR "22-Apr-2005"
+#include <linux/types.h>
+#include <scsi/scsi.h>
+
#define ISCSI_DRAFT20_VERSION 0x00
/* default iSCSI listen port for incoming connections */
#define ISCSI_LISTEN_PORT 3260
+/* iSCSI header length */
+#define ISCSI_HDR_LEN 48
+
+/* iSCSI CRC32C length */
+#define ISCSI_CRC_LEN 4
+
/* Padding word length */
-#define PAD_WORD_LEN 4
+#define ISCSI_PAD_LEN 4
+
+/*
+ * Serial Number Arithmetic, 32 bits, RFC1982
+ */
+
+static inline int iscsi_sna_lt(u32 n1, u32 n2)
+{
+ return (s32)(n1 - n2) < 0;
+}
+
+static inline int iscsi_sna_lte(u32 n1, u32 n2)
+{
+ return (s32)(n1 - n2) <= 0;
+}
+
+static inline int iscsi_sna_gt(u32 n1, u32 n2)
+{
+ return (s32)(n1 - n2) > 0;
+}
+
+static inline int iscsi_sna_gte(u32 n1, u32 n2)
+{
+ return (s32)(n1 - n2) >= 0;
+}
/*
* useful common(control and data pathes) macro
@@ -42,6 +73,14 @@
}
#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
+/* initiator tags; opaque for target */
+typedef uint32_t __bitwise__ itt_t;
+/* below makes sense only for initiator that created this tag */
+#define build_itt(itt, age) ((__force itt_t)\
+ ((itt) | ((age) << ISCSI_AGE_SHIFT)))
+#define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK)
+#define RESERVED_ITT ((__force itt_t)0xffffffff)
+
/*
* iSCSI Template Message Header
*/
@@ -51,8 +90,8 @@ struct iscsi_hdr {
uint8_t rsvd2[2];
uint8_t hlength; /* AHSs total length */
uint8_t dlength[3]; /* Data length */
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag, opaque for target */
__be32 ttt; /* Target Task Tag */
__be32 statsn;
__be32 exp_statsn;
@@ -104,20 +143,21 @@ struct iscsi_ahs_hdr {
#define ISCSI_AHSTYPE_CDB 1
#define ISCSI_AHSTYPE_RLENGTH 2
+#define ISCSI_CDB_SIZE 16
/* iSCSI PDU Header */
-struct iscsi_cmd {
+struct iscsi_scsi_req {
uint8_t opcode;
uint8_t flags;
__be16 rsvd2;
uint8_t hlength;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag */
__be32 data_length;
__be32 cmdsn;
__be32 exp_statsn;
- uint8_t cdb[16]; /* SCSI Command Block */
+ uint8_t cdb[ISCSI_CDB_SIZE]; /* SCSI Command Block */
/* Additional Data (Command Dependent) */
};
@@ -141,8 +181,17 @@ struct iscsi_rlength_ahdr {
__be32 read_length;
};
+/* Extended CDB AHS */
+struct iscsi_ecdb_ahdr {
+ __be16 ahslength; /* CDB length - 15, including reserved byte */
+ uint8_t ahstype;
+ uint8_t reserved;
+ /* 4-byte aligned extended CDB spillover */
+ uint8_t ecdb[SCSI_MAX_VARLEN_CDB_SIZE - ISCSI_CDB_SIZE];
+};
+
/* SCSI Response Header */
-struct iscsi_cmd_rsp {
+struct iscsi_scsi_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t response;
@@ -150,7 +199,7 @@ struct iscsi_cmd_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd[8];
- __be32 itt; /* Initiator Task Tag */
+ itt_t itt; /* Initiator Task Tag */
__be32 rsvd1;
__be32 statsn;
__be32 exp_cmdsn;
@@ -179,7 +228,7 @@ struct iscsi_async {
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
- uint8_t lun[8];
+ struct scsi_lun lun;
uint8_t rsvd4[8];
__be32 statsn;
__be32 exp_cmdsn;
@@ -207,8 +256,8 @@ struct iscsi_nopout {
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 cmdsn;
__be32 exp_statsn;
@@ -222,8 +271,8 @@ struct iscsi_nopin {
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
@@ -238,9 +287,9 @@ struct iscsi_tm {
uint8_t rsvd1[2];
uint8_t hlength;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
- __be32 rtt; /* Reference Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag */
+ itt_t rtt; /* Reference Task Tag */
__be32 cmdsn;
__be32 exp_statsn;
__be32 refcmdsn;
@@ -260,6 +309,8 @@ struct iscsi_tm {
#define ISCSI_TM_FUNC_TARGET_COLD_RESET 7
#define ISCSI_TM_FUNC_TASK_REASSIGN 8
+#define ISCSI_TM_FUNC_VALUE(hdr) ((hdr)->flags & ISCSI_FLAG_TM_FUNC_MASK)
+
/* SCSI Task Management Response Header */
struct iscsi_tm_rsp {
uint8_t opcode;
@@ -269,8 +320,8 @@ struct iscsi_tm_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
- __be32 itt; /* Initiator Task Tag */
- __be32 rtt; /* Reference Task Tag */
+ itt_t itt; /* Initiator Task Tag */
+ itt_t rtt; /* Reference Task Tag */
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
@@ -294,8 +345,8 @@ struct iscsi_r2t_rsp {
uint8_t rsvd2[2];
uint8_t hlength;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt; /* Initiator Task Tag */
+ struct scsi_lun lun;
+ itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
@@ -312,8 +363,8 @@ struct iscsi_data {
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt;
+ struct scsi_lun lun;
+ itt_t itt;
__be32 ttt;
__be32 rsvd4;
__be32 exp_statsn;
@@ -332,8 +383,8 @@ struct iscsi_data_rsp {
uint8_t cmd_status;
uint8_t hlength;
uint8_t dlength[3];
- uint8_t lun[8];
- __be32 itt;
+ struct scsi_lun lun;
+ itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
@@ -357,7 +408,7 @@ struct iscsi_text {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
- __be32 itt;
+ itt_t itt;
__be32 ttt;
__be32 cmdsn;
__be32 exp_statsn;
@@ -375,7 +426,7 @@ struct iscsi_text_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
- __be32 itt;
+ itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
@@ -385,7 +436,7 @@ struct iscsi_text_rsp {
};
/* Login Header */
-struct iscsi_login {
+struct iscsi_login_req {
uint8_t opcode;
uint8_t flags;
uint8_t max_version; /* Max. version supported */
@@ -394,7 +445,7 @@ struct iscsi_login {
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
- __be32 itt; /* Initiator Task Tag */
+ itt_t itt; /* Initiator Task Tag */
__be16 cid;
__be16 rsvd3;
__be32 cmdsn;
@@ -406,7 +457,13 @@ struct iscsi_login {
#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE1 0x04
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE2 0x08
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE3 0x0C
#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE1 0x01
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE2 0x02
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE3 0x03
#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
@@ -423,7 +480,7 @@ struct iscsi_login_rsp {
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
- __be32 itt; /* Initiator Task Tag */
+ itt_t itt; /* Initiator Task Tag */
__be32 rsvd3;
__be32 statsn;
__be32 exp_cmdsn;
@@ -480,7 +537,7 @@ struct iscsi_logout {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
- __be32 itt; /* Initiator Task Tag */
+ itt_t itt; /* Initiator Task Tag */
__be16 cid;
uint8_t rsvd3[2];
__be32 cmdsn;
@@ -507,7 +564,7 @@ struct iscsi_logout_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd3[8];
- __be32 itt; /* Initiator Task Tag */
+ itt_t itt; /* Initiator Task Tag */
__be32 rsvd4;
__be32 statsn;
__be32 exp_cmdsn;
@@ -529,17 +586,25 @@ struct iscsi_logout_rsp {
struct iscsi_snack {
uint8_t opcode;
uint8_t flags;
- uint8_t rsvd2[14];
- __be32 itt;
+ uint8_t rsvd2[2];
+ uint8_t hlength;
+ uint8_t dlength[3];
+ uint8_t lun[8];
+ itt_t itt;
+ __be32 ttt;
+ uint8_t rsvd3[4];
+ __be32 exp_statsn;
+ uint8_t rsvd4[8];
__be32 begrun;
__be32 runlength;
- __be32 exp_statsn;
- __be32 rsvd3;
- __be32 exp_datasn;
- uint8_t rsvd6[8];
};
/* SNACK PDU flags */
+#define ISCSI_FLAG_SNACK_TYPE_DATA 0
+#define ISCSI_FLAG_SNACK_TYPE_R2T 0
+#define ISCSI_FLAG_SNACK_TYPE_STATUS 1
+#define ISCSI_FLAG_SNACK_TYPE_DATA_ACK 2
+#define ISCSI_FLAG_SNACK_TYPE_RDATA 3
#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */
/* Reject Message Header */
@@ -582,7 +647,21 @@ struct iscsi_reject {
#define VALUE_MAXLEN 255
#define TARGET_NAME_MAXLEN VALUE_MAXLEN
-#define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH 8192
+#define ISCSI_DEF_MAX_RECV_SEG_LEN 8192
+#define ISCSI_MIN_MAX_RECV_SEG_LEN 512
+#define ISCSI_MAX_MAX_RECV_SEG_LEN 16777215
+
+#define ISCSI_DEF_FIRST_BURST_LEN 65536
+#define ISCSI_MIN_FIRST_BURST_LEN 512
+#define ISCSI_MAX_FIRST_BURST_LEN 16777215
+
+#define ISCSI_DEF_MAX_BURST_LEN 262144
+#define ISCSI_MIN_MAX_BURST_LEN 512
+#define ISCSI_MAX_MAX_BURST_LEN 16777215
+
+#define ISCSI_DEF_TIME2WAIT 2
+
+#define ISCSI_NAME_LEN 224
/************************* RFC 3720 End *****************************/
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 19:13:59 +0000