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926 lines
26 KiB
926 lines
26 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef ISCSI_TARGET_CORE_H |
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#define ISCSI_TARGET_CORE_H |
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#include <linux/dma-direction.h> /* enum dma_data_direction */ |
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#include <linux/list.h> /* struct list_head */ |
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#include <linux/sched.h> |
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#include <linux/socket.h> /* struct sockaddr_storage */ |
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#include <linux/types.h> /* u8 */ |
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#include <scsi/iscsi_proto.h> /* itt_t */ |
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#include <target/target_core_base.h> /* struct se_cmd */ |
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struct sock; |
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#define ISCSIT_VERSION "v4.1.0" |
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#define ISCSI_MAX_DATASN_MISSING_COUNT 16 |
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#define ISCSI_TX_THREAD_TCP_TIMEOUT 2 |
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#define ISCSI_RX_THREAD_TCP_TIMEOUT 2 |
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#define SECONDS_FOR_ASYNC_LOGOUT 10 |
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#define SECONDS_FOR_ASYNC_TEXT 10 |
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#define SECONDS_FOR_LOGOUT_COMP 15 |
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#define WHITE_SPACE " \t\v\f\n\r" |
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#define ISCSIT_MIN_TAGS 16 |
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#define ISCSIT_EXTRA_TAGS 8 |
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#define ISCSIT_TCP_BACKLOG 256 |
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#define ISCSI_RX_THREAD_NAME "iscsi_trx" |
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#define ISCSI_TX_THREAD_NAME "iscsi_ttx" |
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#define ISCSI_IQN_LEN 224 |
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/* struct iscsi_node_attrib sanity values */ |
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#define NA_DATAOUT_TIMEOUT 3 |
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#define NA_DATAOUT_TIMEOUT_MAX 60 |
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#define NA_DATAOUT_TIMEOUT_MIX 2 |
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#define NA_DATAOUT_TIMEOUT_RETRIES 5 |
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#define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 |
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#define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 |
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#define NA_NOPIN_TIMEOUT 15 |
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#define NA_NOPIN_TIMEOUT_MAX 60 |
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#define NA_NOPIN_TIMEOUT_MIN 3 |
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#define NA_NOPIN_RESPONSE_TIMEOUT 30 |
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#define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 |
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#define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 |
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#define NA_RANDOM_DATAIN_PDU_OFFSETS 0 |
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#define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 |
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#define NA_RANDOM_R2T_OFFSETS 0 |
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/* struct iscsi_tpg_attrib sanity values */ |
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#define TA_AUTHENTICATION 1 |
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#define TA_LOGIN_TIMEOUT 15 |
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#define TA_LOGIN_TIMEOUT_MAX 30 |
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#define TA_LOGIN_TIMEOUT_MIN 5 |
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#define TA_NETIF_TIMEOUT 2 |
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#define TA_NETIF_TIMEOUT_MAX 15 |
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#define TA_NETIF_TIMEOUT_MIN 2 |
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#define TA_GENERATE_NODE_ACLS 0 |
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#define TA_DEFAULT_CMDSN_DEPTH 64 |
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#define TA_DEFAULT_CMDSN_DEPTH_MAX 512 |
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#define TA_DEFAULT_CMDSN_DEPTH_MIN 1 |
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#define TA_CACHE_DYNAMIC_ACLS 0 |
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/* Enabled by default in demo mode (generic_node_acls=1) */ |
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#define TA_DEMO_MODE_WRITE_PROTECT 1 |
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/* Disabled by default in production mode w/ explict ACLs */ |
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#define TA_PROD_MODE_WRITE_PROTECT 0 |
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#define TA_DEMO_MODE_DISCOVERY 1 |
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#define TA_DEFAULT_ERL 0 |
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#define TA_CACHE_CORE_NPS 0 |
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/* T10 protection information disabled by default */ |
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#define TA_DEFAULT_T10_PI 0 |
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#define TA_DEFAULT_FABRIC_PROT_TYPE 0 |
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/* TPG status needs to be enabled to return sendtargets discovery endpoint info */ |
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#define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 |
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/* |
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* Used to control the sending of keys with optional to respond state bit, |
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* as a workaround for non RFC compliant initiators,that do not propose, |
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* nor respond to specific keys required for login to complete. |
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* |
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* See iscsi_check_proposer_for_optional_reply() for more details. |
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*/ |
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#define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1 |
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#define ISCSI_IOV_DATA_BUFFER 5 |
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enum iscsit_transport_type { |
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ISCSI_TCP = 0, |
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ISCSI_SCTP_TCP = 1, |
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ISCSI_SCTP_UDP = 2, |
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ISCSI_IWARP_TCP = 3, |
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ISCSI_IWARP_SCTP = 4, |
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ISCSI_INFINIBAND = 5, |
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ISCSI_CXGBIT = 6, |
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}; |
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/* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ |
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enum target_conn_state_table { |
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TARG_CONN_STATE_FREE = 0x1, |
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TARG_CONN_STATE_XPT_UP = 0x3, |
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TARG_CONN_STATE_IN_LOGIN = 0x4, |
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TARG_CONN_STATE_LOGGED_IN = 0x5, |
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TARG_CONN_STATE_IN_LOGOUT = 0x6, |
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TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, |
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TARG_CONN_STATE_CLEANUP_WAIT = 0x8, |
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}; |
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/* RFC-3720 7.3.2 Session State Diagram for a Target */ |
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enum target_sess_state_table { |
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TARG_SESS_STATE_FREE = 0x1, |
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TARG_SESS_STATE_ACTIVE = 0x2, |
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TARG_SESS_STATE_LOGGED_IN = 0x3, |
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TARG_SESS_STATE_FAILED = 0x4, |
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TARG_SESS_STATE_IN_CONTINUE = 0x5, |
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}; |
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/* struct iscsi_data_count->type */ |
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enum data_count_type { |
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ISCSI_RX_DATA = 1, |
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ISCSI_TX_DATA = 2, |
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}; |
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/* struct iscsi_datain_req->dr_complete */ |
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enum datain_req_comp_table { |
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DATAIN_COMPLETE_NORMAL = 1, |
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DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, |
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DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, |
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}; |
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/* struct iscsi_datain_req->recovery */ |
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enum datain_req_rec_table { |
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DATAIN_WITHIN_COMMAND_RECOVERY = 1, |
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DATAIN_CONNECTION_RECOVERY = 2, |
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}; |
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/* struct iscsi_portal_group->state */ |
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enum tpg_state_table { |
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TPG_STATE_FREE = 0, |
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TPG_STATE_ACTIVE = 1, |
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TPG_STATE_INACTIVE = 2, |
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TPG_STATE_COLD_RESET = 3, |
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}; |
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/* struct iscsi_tiqn->tiqn_state */ |
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enum tiqn_state_table { |
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TIQN_STATE_ACTIVE = 1, |
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TIQN_STATE_SHUTDOWN = 2, |
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}; |
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/* struct iscsi_cmd->cmd_flags */ |
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enum cmd_flags_table { |
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ICF_GOT_LAST_DATAOUT = 0x00000001, |
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ICF_GOT_DATACK_SNACK = 0x00000002, |
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ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, |
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ICF_SENT_LAST_R2T = 0x00000008, |
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ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, |
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ICF_CONTIG_MEMORY = 0x00000020, |
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ICF_ATTACHED_TO_RQUEUE = 0x00000040, |
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ICF_OOO_CMDSN = 0x00000080, |
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ICF_SENDTARGETS_ALL = 0x00000100, |
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ICF_SENDTARGETS_SINGLE = 0x00000200, |
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}; |
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/* struct iscsi_cmd->i_state */ |
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enum cmd_i_state_table { |
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ISTATE_NO_STATE = 0, |
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ISTATE_NEW_CMD = 1, |
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ISTATE_DEFERRED_CMD = 2, |
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ISTATE_UNSOLICITED_DATA = 3, |
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ISTATE_RECEIVE_DATAOUT = 4, |
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ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, |
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ISTATE_RECEIVED_LAST_DATAOUT = 6, |
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ISTATE_WITHIN_DATAOUT_RECOVERY = 7, |
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ISTATE_IN_CONNECTION_RECOVERY = 8, |
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ISTATE_RECEIVED_TASKMGT = 9, |
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ISTATE_SEND_ASYNCMSG = 10, |
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ISTATE_SENT_ASYNCMSG = 11, |
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ISTATE_SEND_DATAIN = 12, |
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ISTATE_SEND_LAST_DATAIN = 13, |
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ISTATE_SENT_LAST_DATAIN = 14, |
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ISTATE_SEND_LOGOUTRSP = 15, |
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ISTATE_SENT_LOGOUTRSP = 16, |
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ISTATE_SEND_NOPIN = 17, |
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ISTATE_SENT_NOPIN = 18, |
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ISTATE_SEND_REJECT = 19, |
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ISTATE_SENT_REJECT = 20, |
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ISTATE_SEND_R2T = 21, |
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ISTATE_SENT_R2T = 22, |
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ISTATE_SEND_R2T_RECOVERY = 23, |
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ISTATE_SENT_R2T_RECOVERY = 24, |
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ISTATE_SEND_LAST_R2T = 25, |
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ISTATE_SENT_LAST_R2T = 26, |
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ISTATE_SEND_LAST_R2T_RECOVERY = 27, |
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ISTATE_SENT_LAST_R2T_RECOVERY = 28, |
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ISTATE_SEND_STATUS = 29, |
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ISTATE_SEND_STATUS_BROKEN_PC = 30, |
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ISTATE_SENT_STATUS = 31, |
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ISTATE_SEND_STATUS_RECOVERY = 32, |
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ISTATE_SENT_STATUS_RECOVERY = 33, |
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ISTATE_SEND_TASKMGTRSP = 34, |
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ISTATE_SENT_TASKMGTRSP = 35, |
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ISTATE_SEND_TEXTRSP = 36, |
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ISTATE_SENT_TEXTRSP = 37, |
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ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, |
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ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, |
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ISTATE_SEND_NOPIN_NO_RESPONSE = 40, |
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ISTATE_REMOVE = 41, |
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ISTATE_FREE = 42, |
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}; |
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/* Used for iscsi_recover_cmdsn() return values */ |
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enum recover_cmdsn_ret_table { |
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CMDSN_ERROR_CANNOT_RECOVER = -1, |
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CMDSN_NORMAL_OPERATION = 0, |
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CMDSN_LOWER_THAN_EXP = 1, |
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CMDSN_HIGHER_THAN_EXP = 2, |
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CMDSN_MAXCMDSN_OVERRUN = 3, |
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}; |
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/* Used for iscsi_handle_immediate_data() return values */ |
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enum immedate_data_ret_table { |
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IMMEDIATE_DATA_CANNOT_RECOVER = -1, |
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IMMEDIATE_DATA_NORMAL_OPERATION = 0, |
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IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, |
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}; |
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/* Used for iscsi_decide_dataout_action() return values */ |
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enum dataout_action_ret_table { |
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DATAOUT_CANNOT_RECOVER = -1, |
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DATAOUT_NORMAL = 0, |
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DATAOUT_SEND_R2T = 1, |
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DATAOUT_SEND_TO_TRANSPORT = 2, |
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DATAOUT_WITHIN_COMMAND_RECOVERY = 3, |
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}; |
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/* Used for struct iscsi_node_auth->naf_flags */ |
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enum naf_flags_table { |
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NAF_USERID_SET = 0x01, |
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NAF_PASSWORD_SET = 0x02, |
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NAF_USERID_IN_SET = 0x04, |
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NAF_PASSWORD_IN_SET = 0x08, |
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}; |
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/* Used by various struct timer_list to manage iSCSI specific state */ |
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enum iscsi_timer_flags_table { |
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ISCSI_TF_RUNNING = 0x01, |
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ISCSI_TF_STOP = 0x02, |
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ISCSI_TF_EXPIRED = 0x04, |
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}; |
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/* Used for struct iscsi_np->np_flags */ |
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enum np_flags_table { |
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NPF_IP_NETWORK = 0x00, |
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}; |
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/* Used for struct iscsi_np->np_thread_state */ |
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enum np_thread_state_table { |
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ISCSI_NP_THREAD_ACTIVE = 1, |
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ISCSI_NP_THREAD_INACTIVE = 2, |
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ISCSI_NP_THREAD_RESET = 3, |
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ISCSI_NP_THREAD_SHUTDOWN = 4, |
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ISCSI_NP_THREAD_EXIT = 5, |
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}; |
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struct iscsi_conn_ops { |
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u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ |
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u8 DataDigest; /* [0,1] == [None,CRC32C] */ |
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u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ |
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u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ |
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/* |
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* iSER specific connection parameters |
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*/ |
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u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ |
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u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ |
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}; |
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struct iscsi_sess_ops { |
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char InitiatorName[ISCSI_IQN_LEN]; |
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char InitiatorAlias[256]; |
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char TargetName[ISCSI_IQN_LEN]; |
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char TargetAlias[256]; |
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char TargetAddress[256]; |
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u16 TargetPortalGroupTag; /* [0..65535] */ |
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u16 MaxConnections; /* [1..65535] */ |
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u8 InitialR2T; /* [0,1] == [No,Yes] */ |
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u8 ImmediateData; /* [0,1] == [No,Yes] */ |
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u32 MaxBurstLength; /* [512..2**24-1] */ |
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u32 FirstBurstLength; /* [512..2**24-1] */ |
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u16 DefaultTime2Wait; /* [0..3600] */ |
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u16 DefaultTime2Retain; /* [0..3600] */ |
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u16 MaxOutstandingR2T; /* [1..65535] */ |
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u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ |
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u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ |
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u8 ErrorRecoveryLevel; /* [0..2] */ |
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u8 SessionType; /* [0,1] == [Normal,Discovery]*/ |
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/* |
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* iSER specific session parameters |
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*/ |
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u8 RDMAExtensions; /* [0,1] == [No,Yes] */ |
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}; |
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struct iscsi_queue_req { |
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int state; |
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struct iscsi_cmd *cmd; |
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struct list_head qr_list; |
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}; |
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struct iscsi_param_list { |
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bool iser; |
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struct list_head param_list; |
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struct list_head extra_response_list; |
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}; |
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struct iscsi_datain_req { |
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enum datain_req_comp_table dr_complete; |
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int generate_recovery_values; |
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enum datain_req_rec_table recovery; |
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u32 begrun; |
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u32 runlength; |
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u32 data_length; |
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u32 data_offset; |
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u32 data_sn; |
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u32 next_burst_len; |
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u32 read_data_done; |
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u32 seq_send_order; |
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struct list_head cmd_datain_node; |
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} ____cacheline_aligned; |
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struct iscsi_ooo_cmdsn { |
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u16 cid; |
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u32 batch_count; |
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u32 cmdsn; |
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u32 exp_cmdsn; |
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struct iscsi_cmd *cmd; |
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struct list_head ooo_list; |
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} ____cacheline_aligned; |
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struct iscsi_datain { |
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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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} ____cacheline_aligned; |
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struct iscsi_r2t { |
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int seq_complete; |
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int recovery_r2t; |
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int sent_r2t; |
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u32 r2t_sn; |
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u32 offset; |
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u32 targ_xfer_tag; |
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u32 xfer_len; |
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struct list_head r2t_list; |
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} ____cacheline_aligned; |
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struct iscsi_cmd { |
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enum iscsi_timer_flags_table dataout_timer_flags; |
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/* DataOUT timeout retries */ |
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u8 dataout_timeout_retries; |
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/* Within command recovery count */ |
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u8 error_recovery_count; |
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/* iSCSI dependent state for out or order CmdSNs */ |
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enum cmd_i_state_table deferred_i_state; |
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/* iSCSI dependent state */ |
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enum cmd_i_state_table i_state; |
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/* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */ |
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u8 immediate_cmd; |
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/* Immediate data present */ |
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u8 immediate_data; |
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/* iSCSI Opcode */ |
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u8 iscsi_opcode; |
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/* iSCSI Response Code */ |
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u8 iscsi_response; |
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/* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ |
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u8 logout_reason; |
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/* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */ |
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u8 logout_response; |
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/* MaxCmdSN has been incremented */ |
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u8 maxcmdsn_inc; |
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/* Immediate Unsolicited Dataout */ |
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u8 unsolicited_data; |
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/* Reject reason code */ |
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u8 reject_reason; |
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/* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */ |
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u16 logout_cid; |
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/* Command flags */ |
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enum cmd_flags_table cmd_flags; |
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/* Initiator Task Tag assigned from Initiator */ |
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itt_t init_task_tag; |
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/* Target Transfer Tag assigned from Target */ |
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u32 targ_xfer_tag; |
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/* CmdSN assigned from Initiator */ |
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u32 cmd_sn; |
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/* ExpStatSN assigned from Initiator */ |
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u32 exp_stat_sn; |
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/* StatSN assigned to this ITT */ |
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u32 stat_sn; |
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/* DataSN Counter */ |
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u32 data_sn; |
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/* R2TSN Counter */ |
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u32 r2t_sn; |
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/* Last DataSN acknowledged via DataAck SNACK */ |
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u32 acked_data_sn; |
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/* Used for echoing NOPOUT ping data */ |
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u32 buf_ptr_size; |
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/* Used to store DataDigest */ |
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u32 data_crc; |
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/* Counter for MaxOutstandingR2T */ |
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u32 outstanding_r2ts; |
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/* Next R2T Offset when DataSequenceInOrder=Yes */ |
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u32 r2t_offset; |
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/* Iovec current and orig count for iscsi_cmd->iov_data */ |
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u32 iov_data_count; |
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u32 orig_iov_data_count; |
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/* Number of miscellaneous iovecs used for IP stack calls */ |
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u32 iov_misc_count; |
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/* Number of struct iscsi_pdu in struct iscsi_cmd->pdu_list */ |
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u32 pdu_count; |
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/* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ |
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u32 pdu_send_order; |
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/* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ |
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u32 pdu_start; |
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/* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ |
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u32 seq_send_order; |
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/* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ |
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u32 seq_count; |
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/* Current struct iscsi_seq in struct iscsi_cmd->seq_list */ |
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u32 seq_no; |
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/* Lowest offset in current DataOUT sequence */ |
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u32 seq_start_offset; |
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/* Highest offset in current DataOUT sequence */ |
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u32 seq_end_offset; |
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/* Total size in bytes received so far of READ data */ |
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u32 read_data_done; |
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/* Total size in bytes received so far of WRITE data */ |
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u32 write_data_done; |
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/* Counter for FirstBurstLength key */ |
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u32 first_burst_len; |
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/* Counter for MaxBurstLength key */ |
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u32 next_burst_len; |
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/* Transfer size used for IP stack calls */ |
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u32 tx_size; |
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/* Buffer used for various purposes */ |
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void *buf_ptr; |
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/* Used by SendTargets=[iqn.,eui.] discovery */ |
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void *text_in_ptr; |
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/* See include/linux/dma-mapping.h */ |
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enum dma_data_direction data_direction; |
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/* iSCSI PDU Header + CRC */ |
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unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN]; |
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/* Number of times struct iscsi_cmd is present in immediate queue */ |
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atomic_t immed_queue_count; |
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atomic_t response_queue_count; |
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spinlock_t datain_lock; |
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spinlock_t dataout_timeout_lock; |
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/* spinlock for protecting struct iscsi_cmd->i_state */ |
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spinlock_t istate_lock; |
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/* spinlock for adding within command recovery entries */ |
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spinlock_t error_lock; |
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/* spinlock for adding R2Ts */ |
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spinlock_t r2t_lock; |
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/* DataIN List */ |
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struct list_head datain_list; |
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/* R2T List */ |
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struct list_head cmd_r2t_list; |
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/* Timer for DataOUT */ |
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struct timer_list dataout_timer; |
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/* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */ |
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struct kvec *iov_data; |
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void *overflow_buf; |
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/* Iovecs for miscellaneous purposes */ |
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#define ISCSI_MISC_IOVECS 5 |
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struct kvec iov_misc[ISCSI_MISC_IOVECS]; |
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/* Array of struct iscsi_pdu used for DataPDUInOrder=No */ |
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struct iscsi_pdu *pdu_list; |
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/* Current struct iscsi_pdu used for DataPDUInOrder=No */ |
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struct iscsi_pdu *pdu_ptr; |
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/* Array of struct iscsi_seq used for DataSequenceInOrder=No */ |
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struct iscsi_seq *seq_list; |
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/* Current struct iscsi_seq used for DataSequenceInOrder=No */ |
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struct iscsi_seq *seq_ptr; |
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/* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */ |
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struct iscsi_tmr_req *tmr_req; |
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/* Connection this command is alligient to */ |
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struct iscsi_conn *conn; |
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/* Pointer to connection recovery entry */ |
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struct iscsi_conn_recovery *cr; |
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/* Session the command is part of, used for connection recovery */ |
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struct iscsi_session *sess; |
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/* list_head for connection list */ |
|
struct list_head i_conn_node; |
|
/* The TCM I/O descriptor that is accessed via container_of() */ |
|
struct se_cmd se_cmd; |
|
/* Sense buffer that will be mapped into outgoing status */ |
|
#define ISCSI_SENSE_BUFFER_LEN (TRANSPORT_SENSE_BUFFER + 2) |
|
unsigned char sense_buffer[ISCSI_SENSE_BUFFER_LEN]; |
|
|
|
u32 padding; |
|
u8 pad_bytes[4]; |
|
|
|
struct scatterlist *first_data_sg; |
|
u32 first_data_sg_off; |
|
u32 kmapped_nents; |
|
sense_reason_t sense_reason; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_tmr_req { |
|
bool task_reassign:1; |
|
u32 exp_data_sn; |
|
struct iscsi_cmd *ref_cmd; |
|
struct iscsi_conn_recovery *conn_recovery; |
|
struct se_tmr_req *se_tmr_req; |
|
}; |
|
|
|
struct iscsi_conn { |
|
wait_queue_head_t queues_wq; |
|
/* Authentication Successful for this connection */ |
|
u8 auth_complete; |
|
/* State connection is currently in */ |
|
u8 conn_state; |
|
u8 conn_logout_reason; |
|
u8 network_transport; |
|
enum iscsi_timer_flags_table nopin_timer_flags; |
|
enum iscsi_timer_flags_table nopin_response_timer_flags; |
|
/* Used to know what thread encountered a transport failure */ |
|
u8 which_thread; |
|
/* connection id assigned by the Initiator */ |
|
u16 cid; |
|
/* Remote TCP Port */ |
|
u16 login_port; |
|
int net_size; |
|
int login_family; |
|
u32 auth_id; |
|
u32 conn_flags; |
|
/* Used for iscsi_tx_login_rsp() */ |
|
itt_t login_itt; |
|
u32 exp_statsn; |
|
/* Per connection status sequence number */ |
|
u32 stat_sn; |
|
struct sockaddr_storage login_sockaddr; |
|
struct sockaddr_storage local_sockaddr; |
|
int conn_usage_count; |
|
int conn_waiting_on_uc; |
|
atomic_t check_immediate_queue; |
|
atomic_t conn_logout_remove; |
|
atomic_t connection_exit; |
|
atomic_t connection_recovery; |
|
atomic_t connection_reinstatement; |
|
atomic_t connection_wait_rcfr; |
|
atomic_t sleep_on_conn_wait_comp; |
|
atomic_t transport_failed; |
|
struct completion conn_post_wait_comp; |
|
struct completion conn_wait_comp; |
|
struct completion conn_wait_rcfr_comp; |
|
struct completion conn_waiting_on_uc_comp; |
|
struct completion conn_logout_comp; |
|
struct completion tx_half_close_comp; |
|
struct completion rx_half_close_comp; |
|
/* socket used by this connection */ |
|
struct socket *sock; |
|
void (*orig_data_ready)(struct sock *); |
|
void (*orig_state_change)(struct sock *); |
|
#define LOGIN_FLAGS_READY 0 |
|
#define LOGIN_FLAGS_INITIAL_PDU 1 |
|
#define LOGIN_FLAGS_READ_ACTIVE 2 |
|
#define LOGIN_FLAGS_WRITE_ACTIVE 3 |
|
#define LOGIN_FLAGS_CLOSED 4 |
|
unsigned long login_flags; |
|
struct delayed_work login_work; |
|
struct iscsi_login *login; |
|
struct timer_list nopin_timer; |
|
struct timer_list nopin_response_timer; |
|
struct timer_list transport_timer; |
|
struct task_struct *login_kworker; |
|
/* Spinlock used for add/deleting cmd's from conn_cmd_list */ |
|
spinlock_t cmd_lock; |
|
spinlock_t conn_usage_lock; |
|
spinlock_t immed_queue_lock; |
|
spinlock_t nopin_timer_lock; |
|
spinlock_t response_queue_lock; |
|
spinlock_t state_lock; |
|
/* libcrypto RX and TX contexts for crc32c */ |
|
struct ahash_request *conn_rx_hash; |
|
struct ahash_request *conn_tx_hash; |
|
/* Used for scheduling TX and RX connection kthreads */ |
|
cpumask_var_t conn_cpumask; |
|
unsigned int conn_rx_reset_cpumask:1; |
|
unsigned int conn_tx_reset_cpumask:1; |
|
/* list_head of struct iscsi_cmd for this connection */ |
|
struct list_head conn_cmd_list; |
|
struct list_head immed_queue_list; |
|
struct list_head response_queue_list; |
|
struct iscsi_conn_ops *conn_ops; |
|
struct iscsi_login *conn_login; |
|
struct iscsit_transport *conn_transport; |
|
struct iscsi_param_list *param_list; |
|
/* Used for per connection auth state machine */ |
|
void *auth_protocol; |
|
void *context; |
|
struct iscsi_login_thread_s *login_thread; |
|
struct iscsi_portal_group *tpg; |
|
struct iscsi_tpg_np *tpg_np; |
|
/* Pointer to parent session */ |
|
struct iscsi_session *sess; |
|
int bitmap_id; |
|
int rx_thread_active; |
|
struct task_struct *rx_thread; |
|
struct completion rx_login_comp; |
|
int tx_thread_active; |
|
struct task_struct *tx_thread; |
|
/* list_head for session connection list */ |
|
struct list_head conn_list; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_conn_recovery { |
|
u16 cid; |
|
u32 cmd_count; |
|
u32 maxrecvdatasegmentlength; |
|
u32 maxxmitdatasegmentlength; |
|
int ready_for_reallegiance; |
|
struct list_head conn_recovery_cmd_list; |
|
spinlock_t conn_recovery_cmd_lock; |
|
struct timer_list time2retain_timer; |
|
struct iscsi_session *sess; |
|
struct list_head cr_list; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_session { |
|
u8 initiator_vendor; |
|
u8 isid[6]; |
|
enum iscsi_timer_flags_table time2retain_timer_flags; |
|
u8 version_active; |
|
u16 cid_called; |
|
u16 conn_recovery_count; |
|
u16 tsih; |
|
/* state session is currently in */ |
|
u32 session_state; |
|
/* session wide counter: initiator assigned task tag */ |
|
itt_t init_task_tag; |
|
/* session wide counter: target assigned task tag */ |
|
u32 targ_xfer_tag; |
|
u32 cmdsn_window; |
|
|
|
/* protects cmdsn values */ |
|
struct mutex cmdsn_mutex; |
|
/* session wide counter: expected command sequence number */ |
|
u32 exp_cmd_sn; |
|
/* session wide counter: maximum allowed command sequence number */ |
|
atomic_t max_cmd_sn; |
|
struct list_head sess_ooo_cmdsn_list; |
|
|
|
/* LIO specific session ID */ |
|
u32 sid; |
|
char auth_type[8]; |
|
/* unique within the target */ |
|
int session_index; |
|
/* Used for session reference counting */ |
|
int session_usage_count; |
|
int session_waiting_on_uc; |
|
atomic_long_t cmd_pdus; |
|
atomic_long_t rsp_pdus; |
|
atomic_long_t tx_data_octets; |
|
atomic_long_t rx_data_octets; |
|
atomic_long_t conn_digest_errors; |
|
atomic_long_t conn_timeout_errors; |
|
u64 creation_time; |
|
/* Number of active connections */ |
|
atomic_t nconn; |
|
atomic_t session_continuation; |
|
atomic_t session_fall_back_to_erl0; |
|
atomic_t session_logout; |
|
atomic_t session_reinstatement; |
|
atomic_t session_stop_active; |
|
atomic_t session_close; |
|
/* connection list */ |
|
struct list_head sess_conn_list; |
|
struct list_head cr_active_list; |
|
struct list_head cr_inactive_list; |
|
spinlock_t conn_lock; |
|
spinlock_t cr_a_lock; |
|
spinlock_t cr_i_lock; |
|
spinlock_t session_usage_lock; |
|
spinlock_t ttt_lock; |
|
struct completion async_msg_comp; |
|
struct completion reinstatement_comp; |
|
struct completion session_wait_comp; |
|
struct completion session_waiting_on_uc_comp; |
|
struct timer_list time2retain_timer; |
|
struct iscsi_sess_ops *sess_ops; |
|
struct se_session *se_sess; |
|
struct iscsi_portal_group *tpg; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_login { |
|
u8 auth_complete; |
|
u8 checked_for_existing; |
|
u8 current_stage; |
|
u8 leading_connection; |
|
u8 first_request; |
|
u8 version_min; |
|
u8 version_max; |
|
u8 login_complete; |
|
u8 login_failed; |
|
bool zero_tsih; |
|
char isid[6]; |
|
u32 cmd_sn; |
|
itt_t init_task_tag; |
|
u32 initial_exp_statsn; |
|
u32 rsp_length; |
|
u16 cid; |
|
u16 tsih; |
|
char req[ISCSI_HDR_LEN]; |
|
char rsp[ISCSI_HDR_LEN]; |
|
char *req_buf; |
|
char *rsp_buf; |
|
struct iscsi_conn *conn; |
|
struct iscsi_np *np; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_node_attrib { |
|
u32 dataout_timeout; |
|
u32 dataout_timeout_retries; |
|
u32 default_erl; |
|
u32 nopin_timeout; |
|
u32 nopin_response_timeout; |
|
u32 random_datain_pdu_offsets; |
|
u32 random_datain_seq_offsets; |
|
u32 random_r2t_offsets; |
|
u32 tmr_cold_reset; |
|
u32 tmr_warm_reset; |
|
struct iscsi_node_acl *nacl; |
|
}; |
|
|
|
struct se_dev_entry_s; |
|
|
|
struct iscsi_node_auth { |
|
enum naf_flags_table naf_flags; |
|
int authenticate_target; |
|
/* Used for iscsit_global->discovery_auth, |
|
* set to zero (auth disabled) by default */ |
|
int enforce_discovery_auth; |
|
#define MAX_USER_LEN 256 |
|
#define MAX_PASS_LEN 256 |
|
char userid[MAX_USER_LEN]; |
|
char password[MAX_PASS_LEN]; |
|
char userid_mutual[MAX_USER_LEN]; |
|
char password_mutual[MAX_PASS_LEN]; |
|
}; |
|
|
|
#include "iscsi_target_stat.h" |
|
|
|
struct iscsi_node_stat_grps { |
|
struct config_group iscsi_sess_stats_group; |
|
struct config_group iscsi_conn_stats_group; |
|
}; |
|
|
|
struct iscsi_node_acl { |
|
struct se_node_acl se_node_acl; |
|
struct iscsi_node_attrib node_attrib; |
|
struct iscsi_node_auth node_auth; |
|
struct iscsi_node_stat_grps node_stat_grps; |
|
}; |
|
|
|
struct iscsi_tpg_attrib { |
|
u32 authentication; |
|
u32 login_timeout; |
|
u32 netif_timeout; |
|
u32 generate_node_acls; |
|
u32 cache_dynamic_acls; |
|
u32 default_cmdsn_depth; |
|
u32 demo_mode_write_protect; |
|
u32 prod_mode_write_protect; |
|
u32 demo_mode_discovery; |
|
u32 default_erl; |
|
u8 t10_pi; |
|
u32 fabric_prot_type; |
|
u32 tpg_enabled_sendtargets; |
|
u32 login_keys_workaround; |
|
struct iscsi_portal_group *tpg; |
|
}; |
|
|
|
struct iscsi_np { |
|
int np_network_transport; |
|
int np_ip_proto; |
|
int np_sock_type; |
|
enum np_thread_state_table np_thread_state; |
|
bool enabled; |
|
atomic_t np_reset_count; |
|
enum iscsi_timer_flags_table np_login_timer_flags; |
|
u32 np_exports; |
|
enum np_flags_table np_flags; |
|
spinlock_t np_thread_lock; |
|
struct completion np_restart_comp; |
|
struct socket *np_socket; |
|
struct sockaddr_storage np_sockaddr; |
|
struct task_struct *np_thread; |
|
struct timer_list np_login_timer; |
|
void *np_context; |
|
struct iscsit_transport *np_transport; |
|
struct list_head np_list; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_tpg_np { |
|
struct iscsi_np *tpg_np; |
|
struct iscsi_portal_group *tpg; |
|
struct iscsi_tpg_np *tpg_np_parent; |
|
struct list_head tpg_np_list; |
|
struct list_head tpg_np_child_list; |
|
struct list_head tpg_np_parent_list; |
|
struct se_tpg_np se_tpg_np; |
|
spinlock_t tpg_np_parent_lock; |
|
struct completion tpg_np_comp; |
|
struct kref tpg_np_kref; |
|
}; |
|
|
|
struct iscsi_portal_group { |
|
unsigned char tpg_chap_id; |
|
/* TPG State */ |
|
enum tpg_state_table tpg_state; |
|
/* Target Portal Group Tag */ |
|
u16 tpgt; |
|
/* Id assigned to target sessions */ |
|
u16 ntsih; |
|
/* Number of active sessions */ |
|
u32 nsessions; |
|
/* Number of Network Portals available for this TPG */ |
|
u32 num_tpg_nps; |
|
/* Per TPG LIO specific session ID. */ |
|
u32 sid; |
|
/* Spinlock for adding/removing Network Portals */ |
|
spinlock_t tpg_np_lock; |
|
spinlock_t tpg_state_lock; |
|
struct se_portal_group tpg_se_tpg; |
|
struct mutex tpg_access_lock; |
|
struct semaphore np_login_sem; |
|
struct iscsi_tpg_attrib tpg_attrib; |
|
struct iscsi_node_auth tpg_demo_auth; |
|
/* Pointer to default list of iSCSI parameters for TPG */ |
|
struct iscsi_param_list *param_list; |
|
struct iscsi_tiqn *tpg_tiqn; |
|
struct list_head tpg_gnp_list; |
|
struct list_head tpg_list; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsi_wwn_stat_grps { |
|
struct config_group iscsi_stat_group; |
|
struct config_group iscsi_instance_group; |
|
struct config_group iscsi_sess_err_group; |
|
struct config_group iscsi_tgt_attr_group; |
|
struct config_group iscsi_login_stats_group; |
|
struct config_group iscsi_logout_stats_group; |
|
}; |
|
|
|
struct iscsi_tiqn { |
|
unsigned char tiqn[ISCSI_IQN_LEN]; |
|
enum tiqn_state_table tiqn_state; |
|
int tiqn_access_count; |
|
u32 tiqn_active_tpgs; |
|
u32 tiqn_ntpgs; |
|
u32 tiqn_num_tpg_nps; |
|
u32 tiqn_nsessions; |
|
struct list_head tiqn_list; |
|
struct list_head tiqn_tpg_list; |
|
spinlock_t tiqn_state_lock; |
|
spinlock_t tiqn_tpg_lock; |
|
struct se_wwn tiqn_wwn; |
|
struct iscsi_wwn_stat_grps tiqn_stat_grps; |
|
int tiqn_index; |
|
struct iscsi_sess_err_stats sess_err_stats; |
|
struct iscsi_login_stats login_stats; |
|
struct iscsi_logout_stats logout_stats; |
|
} ____cacheline_aligned; |
|
|
|
struct iscsit_global { |
|
/* In core shutdown */ |
|
u32 in_shutdown; |
|
u32 active_ts; |
|
/* Unique identifier used for the authentication daemon */ |
|
u32 auth_id; |
|
u32 inactive_ts; |
|
#define ISCSIT_BITMAP_BITS 262144 |
|
/* Thread Set bitmap pointer */ |
|
unsigned long *ts_bitmap; |
|
spinlock_t ts_bitmap_lock; |
|
/* Used for iSCSI discovery session authentication */ |
|
struct iscsi_node_acl discovery_acl; |
|
struct iscsi_portal_group *discovery_tpg; |
|
}; |
|
|
|
static inline u32 session_get_next_ttt(struct iscsi_session *session) |
|
{ |
|
u32 ttt; |
|
|
|
spin_lock_bh(&session->ttt_lock); |
|
ttt = session->targ_xfer_tag++; |
|
if (ttt == 0xFFFFFFFF) |
|
ttt = session->targ_xfer_tag++; |
|
spin_unlock_bh(&session->ttt_lock); |
|
|
|
return ttt; |
|
} |
|
|
|
extern struct iscsi_cmd *iscsit_find_cmd_from_itt(struct iscsi_conn *, itt_t); |
|
|
|
static inline void iscsit_thread_check_cpumask( |
|
struct iscsi_conn *conn, |
|
struct task_struct *p, |
|
int mode) |
|
{ |
|
/* |
|
* mode == 1 signals iscsi_target_tx_thread() usage. |
|
* mode == 0 signals iscsi_target_rx_thread() usage. |
|
*/ |
|
if (mode == 1) { |
|
if (!conn->conn_tx_reset_cpumask) |
|
return; |
|
conn->conn_tx_reset_cpumask = 0; |
|
} else { |
|
if (!conn->conn_rx_reset_cpumask) |
|
return; |
|
conn->conn_rx_reset_cpumask = 0; |
|
} |
|
/* |
|
* Update the CPU mask for this single kthread so that |
|
* both TX and RX kthreads are scheduled to run on the |
|
* same CPU. |
|
*/ |
|
set_cpus_allowed_ptr(p, conn->conn_cpumask); |
|
} |
|
#endif /* ISCSI_TARGET_CORE_H */
|
|
|