LXR linux/drivers/target/iscsi/iscsi_target_seq_pdu

   1#ifndef ISCSI_SEQ_AND_PDU_LIST_H
   2#define ISCSI_SEQ_AND_PDU_LIST_H
   3
   4/* struct iscsi_pdu->status */
   5#define DATAOUT_PDU_SENT                        1
   6
   7/* struct iscsi_seq->type */
   8#define SEQTYPE_IMMEDIATE                       1
   9#define SEQTYPE_UNSOLICITED                     2
  10#define SEQTYPE_NORMAL                          3
  11
  12/* struct iscsi_seq->status */
  13#define DATAOUT_SEQUENCE_GOT_R2T                1
  14#define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2
  15#define DATAOUT_SEQUENCE_COMPLETE               3
  16
  17/* iscsi_determine_counts_for_list() type */
  18#define PDULIST_NORMAL                          1
  19#define PDULIST_IMMEDIATE                       2
  20#define PDULIST_UNSOLICITED                     3
  21#define PDULIST_IMMEDIATE_AND_UNSOLICITED       4
  22
  23/* struct iscsi_pdu->type */
  24#define PDUTYPE_IMMEDIATE                       1
  25#define PDUTYPE_UNSOLICITED                     2
  26#define PDUTYPE_NORMAL                          3
  27
  28/* struct iscsi_pdu->status */
  29#define ISCSI_PDU_NOT_RECEIVED                  0
  30#define ISCSI_PDU_RECEIVED_OK                   1
  31#define ISCSI_PDU_CRC_FAILED                    2
  32#define ISCSI_PDU_TIMED_OUT                     3
  33
  34/* struct iscsi_build_list->randomize */
  35#define RANDOM_DATAIN_PDU_OFFSETS               0x01
  36#define RANDOM_DATAIN_SEQ_OFFSETS               0x02
  37#define RANDOM_DATAOUT_PDU_OFFSETS              0x04
  38#define RANDOM_R2T_OFFSETS                      0x08
  39
  40/* struct iscsi_build_list->data_direction */
  41#define ISCSI_PDU_READ                          0x01
  42#define ISCSI_PDU_WRITE                         0x02
  43
  44struct iscsi_build_list {
  45        int             data_direction;
  46        int             randomize;
  47        int             type;
  48        int             immediate_data_length;
  49};
  50
  51struct iscsi_pdu {
  52        int             status;
  53        int             type;
  54        u8              flags;
  55        u32             data_sn;
  56        u32             length;
  57        u32             offset;
  58        u32             pdu_send_order;
  59        u32             seq_no;
  60} ____cacheline_aligned;
  61
  62struct iscsi_seq {
  63        int             sent;
  64        int             status;
  65        int             type;
  66        u32             data_sn;
  67        u32             first_datasn;
  68        u32             last_datasn;
  69        u32             next_burst_len;
  70        u32             pdu_start;
  71        u32             pdu_count;
  72        u32             offset;
  73        u32             orig_offset;
  74        u32             pdu_send_order;
  75        u32             r2t_sn;
  76        u32             seq_send_order;
  77        u32             seq_no;
  78        u32             xfer_len;
  79} ____cacheline_aligned;
  80
  81extern int iscsit_build_pdu_and_seq_lists(struct iscsi_cmd *, u32);
  82extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
  83extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
  84extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);
  85
  86#endif /* ISCSI_SEQ_AND_PDU_LIST_H */
  87