![Nicholas Bellinger](/assets/img/avatar_default.png)
The Linux-iSCSI.org target module is a full featured in-kernel software implementation of iSCSI target mode (RFC-3720) for the current WIP mainline target v4.1 infrastructure code for the v3.1 kernel. More information can be found here: http://linux-iscsi.org/wiki/ISCSI This includes support for: * RFC-3720 defined request / response state machines and support for all defined iSCSI operation codes from Section 10.2.1.2 using libiscsi include/scsi/iscsi_proto.h PDU definitions * Target v4.1 compatible control plane using the generic layout in target_core_fabric_configfs.c and fabric dependent attributes within /sys/kernel/config/target/iscsi/ subdirectories. * Target v4.1 compatible iSCSI statistics based on RFC-4544 (iSCSI MIBS) * Support for IPv6 and IPv4 network portals in M:N mapping to TPGs * iSCSI Error Recovery Hierarchy support * Per iSCSI connection RX/TX thread pair scheduling affinity * crc32c + crc32c_intel SSEv4 instruction offload support using libcrypto * CHAP Authentication support using libcrypto * Conversion to use internal SGl allocation with iscsit_alloc_buffs() -> transport_generic_map_mem_to_cmd() (nab: Fix iscsi_proto.h struct scsi_lun usage from linux-next in commit: iscsi: Use struct scsi_lun in iscsi structs instead of u8[8]) (nab: Fix 32-bit compile warnings) Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Andy Grover <agrover@redhat.com> Acked-by: Roland Dreier <roland@kernel.org> Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
#ifndef ISCSI_SEQ_AND_PDU_LIST_H
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#define ISCSI_SEQ_AND_PDU_LIST_H
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/* struct iscsi_pdu->status */
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#define DATAOUT_PDU_SENT 1
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/* struct iscsi_seq->type */
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#define SEQTYPE_IMMEDIATE 1
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#define SEQTYPE_UNSOLICITED 2
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#define SEQTYPE_NORMAL 3
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/* struct iscsi_seq->status */
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#define DATAOUT_SEQUENCE_GOT_R2T 1
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#define DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY 2
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#define DATAOUT_SEQUENCE_COMPLETE 3
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/* iscsi_determine_counts_for_list() type */
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#define PDULIST_NORMAL 1
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#define PDULIST_IMMEDIATE 2
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#define PDULIST_UNSOLICITED 3
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#define PDULIST_IMMEDIATE_AND_UNSOLICITED 4
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/* struct iscsi_pdu->type */
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#define PDUTYPE_IMMEDIATE 1
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#define PDUTYPE_UNSOLICITED 2
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#define PDUTYPE_NORMAL 3
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/* struct iscsi_pdu->status */
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#define ISCSI_PDU_NOT_RECEIVED 0
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#define ISCSI_PDU_RECEIVED_OK 1
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#define ISCSI_PDU_CRC_FAILED 2
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#define ISCSI_PDU_TIMED_OUT 3
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/* struct iscsi_build_list->randomize */
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#define RANDOM_DATAIN_PDU_OFFSETS 0x01
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#define RANDOM_DATAIN_SEQ_OFFSETS 0x02
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#define RANDOM_DATAOUT_PDU_OFFSETS 0x04
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#define RANDOM_R2T_OFFSETS 0x08
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/* struct iscsi_build_list->data_direction */
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#define ISCSI_PDU_READ 0x01
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#define ISCSI_PDU_WRITE 0x02
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struct iscsi_build_list {
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int data_direction;
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int randomize;
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int type;
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int immediate_data_length;
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};
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struct iscsi_pdu {
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int status;
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int type;
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u8 flags;
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u32 data_sn;
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u32 length;
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u32 offset;
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u32 pdu_send_order;
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u32 seq_no;
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} ____cacheline_aligned;
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struct iscsi_seq {
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int sent;
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int status;
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int type;
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u32 data_sn;
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u32 first_datasn;
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u32 last_datasn;
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u32 next_burst_len;
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u32 pdu_start;
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u32 pdu_count;
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u32 offset;
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u32 orig_offset;
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u32 pdu_send_order;
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u32 r2t_sn;
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u32 seq_send_order;
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u32 seq_no;
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u32 xfer_len;
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} ____cacheline_aligned;
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extern int iscsit_do_build_list(struct iscsi_cmd *, struct iscsi_build_list *);
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extern struct iscsi_pdu *iscsit_get_pdu_holder(struct iscsi_cmd *, u32, u32);
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extern struct iscsi_pdu *iscsit_get_pdu_holder_for_seq(struct iscsi_cmd *, struct iscsi_seq *);
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extern struct iscsi_seq *iscsit_get_seq_holder(struct iscsi_cmd *, u32, u32);
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#endif /* ISCSI_SEQ_AND_PDU_LIST_H */
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