923 lines
26 KiB
C
923 lines
26 KiB
C
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/* 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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#define NA_AUTHENTICATION_INHERITED -1
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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 iscsit_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 iscsit_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 iscsit_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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||
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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;
|
||
|
|
struct iscsit_cmd *cmd;
|
||
|
|
struct list_head ooo_list;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct iscsi_datain {
|
||
|
|
u8 flags;
|
||
|
|
u32 data_sn;
|
||
|
|
u32 length;
|
||
|
|
u32 offset;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct iscsi_r2t {
|
||
|
|
int seq_complete;
|
||
|
|
int recovery_r2t;
|
||
|
|
int sent_r2t;
|
||
|
|
u32 r2t_sn;
|
||
|
|
u32 offset;
|
||
|
|
u32 targ_xfer_tag;
|
||
|
|
u32 xfer_len;
|
||
|
|
struct list_head r2t_list;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct iscsit_cmd {
|
||
|
|
enum iscsi_timer_flags_table dataout_timer_flags;
|
||
|
|
/* DataOUT timeout retries */
|
||
|
|
u8 dataout_timeout_retries;
|
||
|
|
/* Within command recovery count */
|
||
|
|
u8 error_recovery_count;
|
||
|
|
/* iSCSI dependent state for out or order CmdSNs */
|
||
|
|
enum cmd_i_state_table deferred_i_state;
|
||
|
|
/* iSCSI dependent state */
|
||
|
|
enum cmd_i_state_table i_state;
|
||
|
|
/* Command is an immediate command (ISCSI_OP_IMMEDIATE set) */
|
||
|
|
u8 immediate_cmd;
|
||
|
|
/* Immediate data present */
|
||
|
|
u8 immediate_data;
|
||
|
|
/* iSCSI Opcode */
|
||
|
|
u8 iscsi_opcode;
|
||
|
|
/* iSCSI Response Code */
|
||
|
|
u8 iscsi_response;
|
||
|
|
/* Logout reason when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
|
||
|
|
u8 logout_reason;
|
||
|
|
/* Logout response code when iscsi_opcode == ISCSI_INIT_LOGOUT_CMND */
|
||
|
|
u8 logout_response;
|
||
|
|
/* MaxCmdSN has been incremented */
|
||
|
|
u8 maxcmdsn_inc;
|
||
|
|
/* Immediate Unsolicited Dataout */
|
||
|
|
u8 unsolicited_data;
|
||
|
|
/* Reject reason code */
|
||
|
|
u8 reject_reason;
|
||
|
|
/* CID contained in logout PDU when opcode == ISCSI_INIT_LOGOUT_CMND */
|
||
|
|
u16 logout_cid;
|
||
|
|
/* Command flags */
|
||
|
|
enum cmd_flags_table cmd_flags;
|
||
|
|
/* Initiator Task Tag assigned from Initiator */
|
||
|
|
itt_t init_task_tag;
|
||
|
|
/* Target Transfer Tag assigned from Target */
|
||
|
|
u32 targ_xfer_tag;
|
||
|
|
/* CmdSN assigned from Initiator */
|
||
|
|
u32 cmd_sn;
|
||
|
|
/* ExpStatSN assigned from Initiator */
|
||
|
|
u32 exp_stat_sn;
|
||
|
|
/* StatSN assigned to this ITT */
|
||
|
|
u32 stat_sn;
|
||
|
|
/* DataSN Counter */
|
||
|
|
u32 data_sn;
|
||
|
|
/* R2TSN Counter */
|
||
|
|
u32 r2t_sn;
|
||
|
|
/* Last DataSN acknowledged via DataAck SNACK */
|
||
|
|
u32 acked_data_sn;
|
||
|
|
/* Used for echoing NOPOUT ping data */
|
||
|
|
u32 buf_ptr_size;
|
||
|
|
/* Used to store DataDigest */
|
||
|
|
u32 data_crc;
|
||
|
|
/* Counter for MaxOutstandingR2T */
|
||
|
|
u32 outstanding_r2ts;
|
||
|
|
/* Next R2T Offset when DataSequenceInOrder=Yes */
|
||
|
|
u32 r2t_offset;
|
||
|
|
/* Iovec current and orig count for iscsit_cmd->iov_data */
|
||
|
|
u32 iov_data_count;
|
||
|
|
u32 orig_iov_data_count;
|
||
|
|
/* Number of miscellaneous iovecs used for IP stack calls */
|
||
|
|
u32 iov_misc_count;
|
||
|
|
/* Number of struct iscsi_pdu in struct iscsit_cmd->pdu_list */
|
||
|
|
u32 pdu_count;
|
||
|
|
/* Next struct iscsi_pdu to send in struct iscsit_cmd->pdu_list */
|
||
|
|
u32 pdu_send_order;
|
||
|
|
/* Current struct iscsi_pdu in struct iscsit_cmd->pdu_list */
|
||
|
|
u32 pdu_start;
|
||
|
|
/* Next struct iscsi_seq to send in struct iscsit_cmd->seq_list */
|
||
|
|
u32 seq_send_order;
|
||
|
|
/* Number of struct iscsi_seq in struct iscsit_cmd->seq_list */
|
||
|
|
u32 seq_count;
|
||
|
|
/* Current struct iscsi_seq in struct iscsit_cmd->seq_list */
|
||
|
|
u32 seq_no;
|
||
|
|
/* Lowest offset in current DataOUT sequence */
|
||
|
|
u32 seq_start_offset;
|
||
|
|
/* Highest offset in current DataOUT sequence */
|
||
|
|
u32 seq_end_offset;
|
||
|
|
/* Total size in bytes received so far of READ data */
|
||
|
|
u32 read_data_done;
|
||
|
|
/* Total size in bytes received so far of WRITE data */
|
||
|
|
u32 write_data_done;
|
||
|
|
/* Counter for FirstBurstLength key */
|
||
|
|
u32 first_burst_len;
|
||
|
|
/* Counter for MaxBurstLength key */
|
||
|
|
u32 next_burst_len;
|
||
|
|
/* Transfer size used for IP stack calls */
|
||
|
|
u32 tx_size;
|
||
|
|
/* Buffer used for various purposes */
|
||
|
|
void *buf_ptr;
|
||
|
|
/* Used by SendTargets=[iqn.,eui.] discovery */
|
||
|
|
void *text_in_ptr;
|
||
|
|
/* See include/linux/dma-mapping.h */
|
||
|
|
enum dma_data_direction data_direction;
|
||
|
|
/* iSCSI PDU Header + CRC */
|
||
|
|
unsigned char pdu[ISCSI_HDR_LEN + ISCSI_CRC_LEN];
|
||
|
|
/* Number of times struct iscsit_cmd is present in immediate queue */
|
||
|
|
atomic_t immed_queue_count;
|
||
|
|
atomic_t response_queue_count;
|
||
|
|
spinlock_t datain_lock;
|
||
|
|
spinlock_t dataout_timeout_lock;
|
||
|
|
/* spinlock for protecting struct iscsit_cmd->i_state */
|
||
|
|
spinlock_t istate_lock;
|
||
|
|
/* spinlock for adding within command recovery entries */
|
||
|
|
spinlock_t error_lock;
|
||
|
|
/* spinlock for adding R2Ts */
|
||
|
|
spinlock_t r2t_lock;
|
||
|
|
/* DataIN List */
|
||
|
|
struct list_head datain_list;
|
||
|
|
/* R2T List */
|
||
|
|
struct list_head cmd_r2t_list;
|
||
|
|
/* Timer for DataOUT */
|
||
|
|
struct timer_list dataout_timer;
|
||
|
|
/* Iovecs for SCSI data payload RX/TX w/ kernel level sockets */
|
||
|
|
struct kvec *iov_data;
|
||
|
|
void *overflow_buf;
|
||
|
|
/* Iovecs for miscellaneous purposes */
|
||
|
|
#define ISCSI_MISC_IOVECS 5
|
||
|
|
struct kvec iov_misc[ISCSI_MISC_IOVECS];
|
||
|
|
/* Array of struct iscsi_pdu used for DataPDUInOrder=No */
|
||
|
|
struct iscsi_pdu *pdu_list;
|
||
|
|
/* Current struct iscsi_pdu used for DataPDUInOrder=No */
|
||
|
|
struct iscsi_pdu *pdu_ptr;
|
||
|
|
/* Array of struct iscsi_seq used for DataSequenceInOrder=No */
|
||
|
|
struct iscsi_seq *seq_list;
|
||
|
|
/* Current struct iscsi_seq used for DataSequenceInOrder=No */
|
||
|
|
struct iscsi_seq *seq_ptr;
|
||
|
|
/* TMR Request when iscsi_opcode == ISCSI_OP_SCSI_TMFUNC */
|
||
|
|
struct iscsi_tmr_req *tmr_req;
|
||
|
|
/* Connection this command is alligient to */
|
||
|
|
struct iscsit_conn *conn;
|
||
|
|
/* Pointer to connection recovery entry */
|
||
|
|
struct iscsi_conn_recovery *cr;
|
||
|
|
/* Session the command is part of, used for connection recovery */
|
||
|
|
struct iscsit_session *sess;
|
||
|
|
/* 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 iscsit_cmd *ref_cmd;
|
||
|
|
struct iscsi_conn_recovery *conn_recovery;
|
||
|
|
struct se_tmr_req *se_tmr_req;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct iscsit_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;
|
||
|
|
cpumask_var_t allowed_cpumask;
|
||
|
|
unsigned int conn_rx_reset_cpumask:1;
|
||
|
|
unsigned int conn_tx_reset_cpumask:1;
|
||
|
|
/* list_head of struct iscsit_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 iscsit_session *sess;
|
||
|
|
struct target_cmd_counter *cmd_cnt;
|
||
|
|
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 iscsit_session *sess;
|
||
|
|
struct list_head cr_list;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct iscsit_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 iscsit_conn *conn;
|
||
|
|
struct iscsi_np *np;
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct iscsi_node_attrib {
|
||
|
|
s32 authentication;
|
||
|
|
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;
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline struct iscsi_node_acl *
|
||
|
|
to_iscsi_nacl(struct se_node_acl *se_nacl)
|
||
|
|
{
|
||
|
|
return container_of(se_nacl, struct iscsi_node_acl, se_node_acl);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
static inline struct iscsi_portal_group *
|
||
|
|
to_iscsi_tpg(struct se_portal_group *se_tpg)
|
||
|
|
{
|
||
|
|
return container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
cpumask_var_t allowed_cpumask;
|
||
|
|
/* 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 iscsit_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 iscsit_cmd *iscsit_find_cmd_from_itt(struct iscsit_conn *, itt_t);
|
||
|
|
|
||
|
|
extern void iscsit_thread_check_cpumask(struct iscsit_conn *conn,
|
||
|
|
struct task_struct *p,
|
||
|
|
int mode);
|
||
|
|
|
||
|
|
#endif /* ISCSI_TARGET_CORE_H */
|