Edit File: iscsi_target_core.h
#ifndef ISCSI_TARGET_CORE_H #define ISCSI_TARGET_CORE_H #include <linux/in.h> #include <linux/configfs.h> #include <net/sock.h> #include <net/tcp.h> #include <scsi/scsi_cmnd.h> #include <scsi/iscsi_proto.h> #include <target/target_core_base.h> #define ISCSIT_VERSION "v4.1.0" #define ISCSI_MAX_DATASN_MISSING_COUNT 16 #define ISCSI_TX_THREAD_TCP_TIMEOUT 2 #define ISCSI_RX_THREAD_TCP_TIMEOUT 2 #define SECONDS_FOR_ASYNC_LOGOUT 10 #define SECONDS_FOR_ASYNC_TEXT 10 #define SECONDS_FOR_LOGOUT_COMP 15 #define WHITE_SPACE " \t\v\f\n\r" #define ISCSIT_MIN_TAGS 16 #define ISCSIT_EXTRA_TAGS 8 #define ISCSIT_TCP_BACKLOG 256 #define ISCSI_RX_THREAD_NAME "iscsi_trx" #define ISCSI_TX_THREAD_NAME "iscsi_ttx" #define ISCSI_IQN_LEN 224 /* struct iscsi_node_attrib sanity values */ #define NA_DATAOUT_TIMEOUT 3 #define NA_DATAOUT_TIMEOUT_MAX 60 #define NA_DATAOUT_TIMEOUT_MIX 2 #define NA_DATAOUT_TIMEOUT_RETRIES 5 #define NA_DATAOUT_TIMEOUT_RETRIES_MAX 15 #define NA_DATAOUT_TIMEOUT_RETRIES_MIN 1 #define NA_NOPIN_TIMEOUT 15 #define NA_NOPIN_TIMEOUT_MAX 60 #define NA_NOPIN_TIMEOUT_MIN 3 #define NA_NOPIN_RESPONSE_TIMEOUT 30 #define NA_NOPIN_RESPONSE_TIMEOUT_MAX 60 #define NA_NOPIN_RESPONSE_TIMEOUT_MIN 3 #define NA_RANDOM_DATAIN_PDU_OFFSETS 0 #define NA_RANDOM_DATAIN_SEQ_OFFSETS 0 #define NA_RANDOM_R2T_OFFSETS 0 /* struct iscsi_tpg_attrib sanity values */ #define TA_AUTHENTICATION 1 #define TA_LOGIN_TIMEOUT 15 #define TA_LOGIN_TIMEOUT_MAX 30 #define TA_LOGIN_TIMEOUT_MIN 5 #define TA_NETIF_TIMEOUT 2 #define TA_NETIF_TIMEOUT_MAX 15 #define TA_NETIF_TIMEOUT_MIN 2 #define TA_GENERATE_NODE_ACLS 0 #define TA_DEFAULT_CMDSN_DEPTH 64 #define TA_DEFAULT_CMDSN_DEPTH_MAX 512 #define TA_DEFAULT_CMDSN_DEPTH_MIN 1 #define TA_CACHE_DYNAMIC_ACLS 0 /* Enabled by default in demo mode (generic_node_acls=1) */ #define TA_DEMO_MODE_WRITE_PROTECT 1 /* Disabled by default in production mode w/ explict ACLs */ #define TA_PROD_MODE_WRITE_PROTECT 0 #define TA_DEMO_MODE_DISCOVERY 1 #define TA_DEFAULT_ERL 0 #define TA_CACHE_CORE_NPS 0 /* T10 protection information disabled by default */ #define TA_DEFAULT_T10_PI 0 #define TA_DEFAULT_FABRIC_PROT_TYPE 0 /* TPG status needs to be enabled to return sendtargets discovery endpoint info */ #define TA_DEFAULT_TPG_ENABLED_SENDTARGETS 1 /* * Used to control the sending of keys with optional to respond state bit, * as a workaround for non RFC compliant initiators,that do not propose, * nor respond to specific keys required for login to complete. * * See iscsi_check_proposer_for_optional_reply() for more details. */ #define TA_DEFAULT_LOGIN_KEYS_WORKAROUND 1 #define ISCSI_IOV_DATA_BUFFER 5 enum iscsit_transport_type { ISCSI_TCP = 0, ISCSI_SCTP_TCP = 1, ISCSI_SCTP_UDP = 2, ISCSI_IWARP_TCP = 3, ISCSI_IWARP_SCTP = 4, ISCSI_INFINIBAND = 5, ISCSI_CXGBIT = 6, }; /* RFC-3720 7.1.4 Standard Connection State Diagram for a Target */ enum target_conn_state_table { TARG_CONN_STATE_FREE = 0x1, TARG_CONN_STATE_XPT_UP = 0x3, TARG_CONN_STATE_IN_LOGIN = 0x4, TARG_CONN_STATE_LOGGED_IN = 0x5, TARG_CONN_STATE_IN_LOGOUT = 0x6, TARG_CONN_STATE_LOGOUT_REQUESTED = 0x7, TARG_CONN_STATE_CLEANUP_WAIT = 0x8, }; /* RFC-3720 7.3.2 Session State Diagram for a Target */ enum target_sess_state_table { TARG_SESS_STATE_FREE = 0x1, TARG_SESS_STATE_ACTIVE = 0x2, TARG_SESS_STATE_LOGGED_IN = 0x3, TARG_SESS_STATE_FAILED = 0x4, TARG_SESS_STATE_IN_CONTINUE = 0x5, }; /* struct iscsi_data_count->type */ enum data_count_type { ISCSI_RX_DATA = 1, ISCSI_TX_DATA = 2, }; /* struct iscsi_datain_req->dr_complete */ enum datain_req_comp_table { DATAIN_COMPLETE_NORMAL = 1, DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY = 2, DATAIN_COMPLETE_CONNECTION_RECOVERY = 3, }; /* struct iscsi_datain_req->recovery */ enum datain_req_rec_table { DATAIN_WITHIN_COMMAND_RECOVERY = 1, DATAIN_CONNECTION_RECOVERY = 2, }; /* struct iscsi_portal_group->state */ enum tpg_state_table { TPG_STATE_FREE = 0, TPG_STATE_ACTIVE = 1, TPG_STATE_INACTIVE = 2, TPG_STATE_COLD_RESET = 3, }; /* struct iscsi_tiqn->tiqn_state */ enum tiqn_state_table { TIQN_STATE_ACTIVE = 1, TIQN_STATE_SHUTDOWN = 2, }; /* struct iscsi_cmd->cmd_flags */ enum cmd_flags_table { ICF_GOT_LAST_DATAOUT = 0x00000001, ICF_GOT_DATACK_SNACK = 0x00000002, ICF_NON_IMMEDIATE_UNSOLICITED_DATA = 0x00000004, ICF_SENT_LAST_R2T = 0x00000008, ICF_WITHIN_COMMAND_RECOVERY = 0x00000010, ICF_CONTIG_MEMORY = 0x00000020, ICF_ATTACHED_TO_RQUEUE = 0x00000040, ICF_OOO_CMDSN = 0x00000080, ICF_SENDTARGETS_ALL = 0x00000100, ICF_SENDTARGETS_SINGLE = 0x00000200, }; /* struct iscsi_cmd->i_state */ enum cmd_i_state_table { ISTATE_NO_STATE = 0, ISTATE_NEW_CMD = 1, ISTATE_DEFERRED_CMD = 2, ISTATE_UNSOLICITED_DATA = 3, ISTATE_RECEIVE_DATAOUT = 4, ISTATE_RECEIVE_DATAOUT_RECOVERY = 5, ISTATE_RECEIVED_LAST_DATAOUT = 6, ISTATE_WITHIN_DATAOUT_RECOVERY = 7, ISTATE_IN_CONNECTION_RECOVERY = 8, ISTATE_RECEIVED_TASKMGT = 9, ISTATE_SEND_ASYNCMSG = 10, ISTATE_SENT_ASYNCMSG = 11, ISTATE_SEND_DATAIN = 12, ISTATE_SEND_LAST_DATAIN = 13, ISTATE_SENT_LAST_DATAIN = 14, ISTATE_SEND_LOGOUTRSP = 15, ISTATE_SENT_LOGOUTRSP = 16, ISTATE_SEND_NOPIN = 17, ISTATE_SENT_NOPIN = 18, ISTATE_SEND_REJECT = 19, ISTATE_SENT_REJECT = 20, ISTATE_SEND_R2T = 21, ISTATE_SENT_R2T = 22, ISTATE_SEND_R2T_RECOVERY = 23, ISTATE_SENT_R2T_RECOVERY = 24, ISTATE_SEND_LAST_R2T = 25, ISTATE_SENT_LAST_R2T = 26, ISTATE_SEND_LAST_R2T_RECOVERY = 27, ISTATE_SENT_LAST_R2T_RECOVERY = 28, ISTATE_SEND_STATUS = 29, ISTATE_SEND_STATUS_BROKEN_PC = 30, ISTATE_SENT_STATUS = 31, ISTATE_SEND_STATUS_RECOVERY = 32, ISTATE_SENT_STATUS_RECOVERY = 33, ISTATE_SEND_TASKMGTRSP = 34, ISTATE_SENT_TASKMGTRSP = 35, ISTATE_SEND_TEXTRSP = 36, ISTATE_SENT_TEXTRSP = 37, ISTATE_SEND_NOPIN_WANT_RESPONSE = 38, ISTATE_SENT_NOPIN_WANT_RESPONSE = 39, ISTATE_SEND_NOPIN_NO_RESPONSE = 40, ISTATE_REMOVE = 41, ISTATE_FREE = 42, }; /* Used for iscsi_recover_cmdsn() return values */ enum recover_cmdsn_ret_table { CMDSN_ERROR_CANNOT_RECOVER = -1, CMDSN_NORMAL_OPERATION = 0, CMDSN_LOWER_THAN_EXP = 1, CMDSN_HIGHER_THAN_EXP = 2, CMDSN_MAXCMDSN_OVERRUN = 3, }; /* Used for iscsi_handle_immediate_data() return values */ enum immedate_data_ret_table { IMMEDIATE_DATA_CANNOT_RECOVER = -1, IMMEDIATE_DATA_NORMAL_OPERATION = 0, IMMEDIATE_DATA_ERL1_CRC_FAILURE = 1, }; /* Used for iscsi_decide_dataout_action() return values */ enum dataout_action_ret_table { DATAOUT_CANNOT_RECOVER = -1, DATAOUT_NORMAL = 0, DATAOUT_SEND_R2T = 1, DATAOUT_SEND_TO_TRANSPORT = 2, DATAOUT_WITHIN_COMMAND_RECOVERY = 3, }; /* Used for struct iscsi_node_auth->naf_flags */ enum naf_flags_table { NAF_USERID_SET = 0x01, NAF_PASSWORD_SET = 0x02, NAF_USERID_IN_SET = 0x04, NAF_PASSWORD_IN_SET = 0x08, }; /* Used by various struct timer_list to manage iSCSI specific state */ enum iscsi_timer_flags_table { ISCSI_TF_RUNNING = 0x01, ISCSI_TF_STOP = 0x02, ISCSI_TF_EXPIRED = 0x04, }; /* Used for struct iscsi_np->np_flags */ enum np_flags_table { NPF_IP_NETWORK = 0x00, }; /* Used for struct iscsi_np->np_thread_state */ enum np_thread_state_table { ISCSI_NP_THREAD_ACTIVE = 1, ISCSI_NP_THREAD_INACTIVE = 2, ISCSI_NP_THREAD_RESET = 3, ISCSI_NP_THREAD_SHUTDOWN = 4, ISCSI_NP_THREAD_EXIT = 5, }; struct iscsi_conn_ops { u8 HeaderDigest; /* [0,1] == [None,CRC32C] */ u8 DataDigest; /* [0,1] == [None,CRC32C] */ u32 MaxRecvDataSegmentLength; /* [512..2**24-1] */ u32 MaxXmitDataSegmentLength; /* [512..2**24-1] */ /* * iSER specific connection parameters */ u32 InitiatorRecvDataSegmentLength; /* [512..2**24-1] */ u32 TargetRecvDataSegmentLength; /* [512..2**24-1] */ }; struct iscsi_sess_ops { char InitiatorName[ISCSI_IQN_LEN]; char InitiatorAlias[256]; char TargetName[ISCSI_IQN_LEN]; char TargetAlias[256]; char TargetAddress[256]; u16 TargetPortalGroupTag; /* [0..65535] */ u16 MaxConnections; /* [1..65535] */ u8 InitialR2T; /* [0,1] == [No,Yes] */ u8 ImmediateData; /* [0,1] == [No,Yes] */ u32 MaxBurstLength; /* [512..2**24-1] */ u32 FirstBurstLength; /* [512..2**24-1] */ u16 DefaultTime2Wait; /* [0..3600] */ u16 DefaultTime2Retain; /* [0..3600] */ u16 MaxOutstandingR2T; /* [1..65535] */ u8 DataPDUInOrder; /* [0,1] == [No,Yes] */ u8 DataSequenceInOrder; /* [0,1] == [No,Yes] */ u8 ErrorRecoveryLevel; /* [0..2] */ u8 SessionType; /* [0,1] == [Normal,Discovery]*/ /* * iSER specific session parameters */ u8 RDMAExtensions; /* [0,1] == [No,Yes] */ }; struct iscsi_queue_req { int state; struct iscsi_cmd *cmd; struct list_head qr_list; }; struct iscsi_data_count { int data_length; int sync_and_steering; enum data_count_type type; u32 iov_count; u32 ss_iov_count; u32 ss_marker_count; struct kvec *iov; }; struct iscsi_param_list { bool iser; struct list_head param_list; struct list_head extra_response_list; }; struct iscsi_datain_req { enum datain_req_comp_table dr_complete; int generate_recovery_values; enum datain_req_rec_table recovery; u32 begrun; u32 runlength; u32 data_length; u32 data_offset; u32 data_sn; u32 next_burst_len; u32 read_data_done; u32 seq_send_order; struct list_head cmd_datain_node; } ____cacheline_aligned; struct iscsi_ooo_cmdsn { u16 cid; u32 batch_count; u32 cmdsn; u32 exp_cmdsn; struct iscsi_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 iscsi_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 iscsi_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 iscsi_cmd->pdu_list */ u32 pdu_count; /* Next struct iscsi_pdu to send in struct iscsi_cmd->pdu_list */ u32 pdu_send_order; /* Current struct iscsi_pdu in struct iscsi_cmd->pdu_list */ u32 pdu_start; /* Next struct iscsi_seq to send in struct iscsi_cmd->seq_list */ u32 seq_send_order; /* Number of struct iscsi_seq in struct iscsi_cmd->seq_list */ u32 seq_count; /* Current struct iscsi_seq in struct iscsi_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 iscsi_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 iscsi_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; /* 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 iscsi_conn *conn; /* Pointer to connection recovery entry */ struct iscsi_conn_recovery *cr; /* Session the command is part of, used for connection recovery */ struct iscsi_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 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 *, int); void (*orig_state_change)(struct sock *); #define LOGIN_FLAGS_READ_ACTIVE 1 #define LOGIN_FLAGS_CLOSED 2 #define LOGIN_FLAGS_READY 4 #define LOGIN_FLAGS_INITIAL_PDU 8 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 sleep_on_sess_wait_comp; /* 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 */