iscsi_target_seq_pdu_list.h 2.2 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef ISCSI_SEQ_AND_PDU_LIST_H
  3. #define ISCSI_SEQ_AND_PDU_LIST_H
  4. #include <linux/types.h>
  5. #include <linux/cache.h>
  6. /* struct iscsi_pdu->status */
  7. #define DATAOUT_PDU_SENT 1
  8. /* struct iscsi_seq->type */
  9. #define SEQTYPE_IMMEDIATE 1
  10. #define SEQTYPE_UNSOLICITED 2
  11. #define SEQTYPE_NORMAL 3
  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. /* iscsi_determine_counts_for_list() type */
  17. #define PDULIST_NORMAL 1
  18. #define PDULIST_IMMEDIATE 2
  19. #define PDULIST_UNSOLICITED 3
  20. #define PDULIST_IMMEDIATE_AND_UNSOLICITED 4
  21. /* struct iscsi_pdu->type */
  22. #define PDUTYPE_IMMEDIATE 1
  23. #define PDUTYPE_UNSOLICITED 2
  24. #define PDUTYPE_NORMAL 3
  25. /* struct iscsi_pdu->status */
  26. #define ISCSI_PDU_NOT_RECEIVED 0
  27. #define ISCSI_PDU_RECEIVED_OK 1
  28. #define ISCSI_PDU_CRC_FAILED 2
  29. #define ISCSI_PDU_TIMED_OUT 3
  30. /* struct iscsi_build_list->randomize */
  31. #define RANDOM_DATAIN_PDU_OFFSETS 0x01
  32. #define RANDOM_DATAIN_SEQ_OFFSETS 0x02
  33. #define RANDOM_DATAOUT_PDU_OFFSETS 0x04
  34. #define RANDOM_R2T_OFFSETS 0x08
  35. /* struct iscsi_build_list->data_direction */
  36. #define ISCSI_PDU_READ 0x01
  37. #define ISCSI_PDU_WRITE 0x02
  38. struct iscsi_build_list {
  39. int data_direction;
  40. int randomize;
  41. int type;
  42. int immediate_data_length;
  43. };
  44. struct iscsi_pdu {
  45. int status;
  46. int type;
  47. u8 flags;
  48. u32 data_sn;
  49. u32 length;
  50. u32 offset;
  51. u32 pdu_send_order;
  52. u32 seq_no;
  53. } ____cacheline_aligned;
  54. struct iscsi_seq {
  55. int sent;
  56. int status;
  57. int type;
  58. u32 data_sn;
  59. u32 first_datasn;
  60. u32 last_datasn;
  61. u32 next_burst_len;
  62. u32 pdu_start;
  63. u32 pdu_count;
  64. u32 offset;
  65. u32 orig_offset;
  66. u32 pdu_send_order;
  67. u32 r2t_sn;
  68. u32 seq_send_order;
  69. u32 seq_no;
  70. u32 xfer_len;
  71. } ____cacheline_aligned;
  72. struct iscsi_cmd;
  73. extern int iscsit_build_pdu_and_seq_lists(struct iscsi_cmd *, u32);
  74. extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
  75. extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
  76. extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);
  77. #endif /* ISCSI_SEQ_AND_PDU_LIST_H */