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Diffstat (limited to 'include/target/target_core_base.h')
| -rw-r--r-- | include/target/target_core_base.h | 996 |
1 files changed, 996 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h new file mode 100644 index 000000000..010e966ae --- /dev/null +++ b/include/target/target_core_base.h @@ -0,0 +1,996 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef TARGET_CORE_BASE_H +#define TARGET_CORE_BASE_H + +#include <linux/configfs.h> /* struct config_group */ +#include <linux/dma-direction.h> /* enum dma_data_direction */ +#include <linux/sbitmap.h> +#include <linux/percpu-refcount.h> +#include <linux/semaphore.h> /* struct semaphore */ +#include <linux/completion.h> + +#define TARGET_CORE_VERSION "v5.0" + +/* + * Maximum size of a CDB that can be stored in se_cmd without allocating + * memory dynamically for the CDB. + */ +#define TCM_MAX_COMMAND_SIZE 32 +/* + * From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently + * defined 96, but the real limit is 252 (or 260 including the header) + */ +#define TRANSPORT_SENSE_BUFFER 96 +/* Used by transport_send_check_condition_and_sense() */ +#define SPC_SENSE_KEY_OFFSET 2 +#define SPC_ADD_SENSE_LEN_OFFSET 7 +#define SPC_DESC_TYPE_OFFSET 8 +#define SPC_ADDITIONAL_DESC_LEN_OFFSET 9 +#define SPC_VALIDITY_OFFSET 10 +#define SPC_ASC_KEY_OFFSET 12 +#define SPC_ASCQ_KEY_OFFSET 13 +#define TRANSPORT_IQN_LEN 224 +/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */ +#define LU_GROUP_NAME_BUF 256 +/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */ +#define TG_PT_GROUP_NAME_BUF 256 +/* Used to parse VPD into struct t10_vpd */ +#define VPD_TMP_BUF_SIZE 254 +/* Used by transport_generic_cmd_sequencer() */ +#define READ_BLOCK_LEN 6 +#define READ_CAP_LEN 8 +#define READ_POSITION_LEN 20 +#define INQUIRY_LEN 36 +/* Used by transport_get_inquiry_vpd_serial() */ +#define INQUIRY_VPD_SERIAL_LEN 254 +/* Used by transport_get_inquiry_vpd_device_ident() */ +#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254 + +#define INQUIRY_VENDOR_LEN 8 +#define INQUIRY_MODEL_LEN 16 +#define INQUIRY_REVISION_LEN 4 + +/* Attempts before moving from SHORT to LONG */ +#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3 +#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */ +#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */ + +#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */ + +/* struct se_dev_attrib sanity values */ +/* Default max_unmap_lba_count */ +#define DA_MAX_UNMAP_LBA_COUNT 0 +/* Default max_unmap_block_desc_count */ +#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0 +/* Default unmap_granularity */ +#define DA_UNMAP_GRANULARITY_DEFAULT 0 +/* Default unmap_granularity_alignment */ +#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0 +/* Default unmap_zeroes_data */ +#define DA_UNMAP_ZEROES_DATA_DEFAULT 0 +/* Default max_write_same_len, disabled by default */ +#define DA_MAX_WRITE_SAME_LEN 0 +/* Use a model alias based on the configfs backend device name */ +#define DA_EMULATE_MODEL_ALIAS 0 +/* Emulation for WriteCache and SYNCHRONIZE_CACHE */ +#define DA_EMULATE_WRITE_CACHE 0 +/* Emulation for TASK_ABORTED status (TAS) by default */ +#define DA_EMULATE_TAS 1 +/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */ +#define DA_EMULATE_TPU 0 +/* + * Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using + * block/blk-lib.c:blkdev_issue_discard() + */ +#define DA_EMULATE_TPWS 0 +/* Emulation for CompareAndWrite (AtomicTestandSet) by default */ +#define DA_EMULATE_CAW 1 +/* Emulation for 3rd Party Copy (ExtendedCopy) by default */ +#define DA_EMULATE_3PC 1 +/* No Emulation for PSCSI by default */ +#define DA_EMULATE_ALUA 0 +/* Emulate SCSI2 RESERVE/RELEASE and Persistent Reservations by default */ +#define DA_EMULATE_PR 1 +/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */ +#define DA_ENFORCE_PR_ISIDS 1 +/* Force SPC-3 PR Activate Persistence across Target Power Loss */ +#define DA_FORCE_PR_APTPL 0 +#define DA_STATUS_MAX_SECTORS_MIN 16 +#define DA_STATUS_MAX_SECTORS_MAX 8192 +/* By default don't report non-rotating (solid state) medium */ +#define DA_IS_NONROT 0 +/* Queue Algorithm Modifier default for restricted reordering in control mode page */ +#define DA_EMULATE_REST_REORD 0 + +#define SE_INQUIRY_BUF 1024 +#define SE_MODE_PAGE_BUF 512 +#define SE_SENSE_BUF 96 + +/* struct se_hba->hba_flags */ +enum hba_flags_table { + HBA_FLAGS_INTERNAL_USE = 0x01, + HBA_FLAGS_PSCSI_MODE = 0x02, +}; + +/* Special transport agnostic struct se_cmd->t_states */ +enum transport_state_table { + TRANSPORT_NO_STATE = 0, + TRANSPORT_NEW_CMD = 1, + TRANSPORT_WRITE_PENDING = 3, + TRANSPORT_PROCESSING = 5, + TRANSPORT_COMPLETE = 6, + TRANSPORT_ISTATE_PROCESSING = 11, + TRANSPORT_COMPLETE_QF_WP = 18, + TRANSPORT_COMPLETE_QF_OK = 19, + TRANSPORT_COMPLETE_QF_ERR = 20, +}; + +/* Used for struct se_cmd->se_cmd_flags */ +enum se_cmd_flags_table { + SCF_SUPPORTED_SAM_OPCODE = (1 << 0), + SCF_TRANSPORT_TASK_SENSE = (1 << 1), + SCF_EMULATED_TASK_SENSE = (1 << 2), + SCF_SCSI_DATA_CDB = (1 << 3), + SCF_SCSI_TMR_CDB = (1 << 4), + SCF_FUA = (1 << 5), + SCF_SE_LUN_CMD = (1 << 6), + SCF_BIDI = (1 << 7), + SCF_SENT_CHECK_CONDITION = (1 << 8), + SCF_OVERFLOW_BIT = (1 << 9), + SCF_UNDERFLOW_BIT = (1 << 10), + SCF_ALUA_NON_OPTIMIZED = (1 << 11), + SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = (1 << 12), + SCF_COMPARE_AND_WRITE = (1 << 13), + SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = (1 << 14), + SCF_ACK_KREF = (1 << 15), + SCF_USE_CPUID = (1 << 16), + SCF_TASK_ATTR_SET = (1 << 17), + SCF_TREAT_READ_AS_NORMAL = (1 << 18), +}; + +/* + * Used by transport_send_check_condition_and_sense() + * to signal which ASC/ASCQ sense payload should be built. + */ +typedef unsigned __bitwise sense_reason_t; + +enum tcm_sense_reason_table { +#define R(x) (__force sense_reason_t )(x) + TCM_NO_SENSE = R(0x00), + TCM_NON_EXISTENT_LUN = R(0x01), + TCM_UNSUPPORTED_SCSI_OPCODE = R(0x02), + TCM_INCORRECT_AMOUNT_OF_DATA = R(0x03), + TCM_UNEXPECTED_UNSOLICITED_DATA = R(0x04), + TCM_SERVICE_CRC_ERROR = R(0x05), + TCM_SNACK_REJECTED = R(0x06), + TCM_SECTOR_COUNT_TOO_MANY = R(0x07), + TCM_INVALID_CDB_FIELD = R(0x08), + TCM_INVALID_PARAMETER_LIST = R(0x09), + TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = R(0x0a), + TCM_UNKNOWN_MODE_PAGE = R(0x0b), + TCM_WRITE_PROTECTED = R(0x0c), + TCM_CHECK_CONDITION_ABORT_CMD = R(0x0d), + TCM_CHECK_CONDITION_UNIT_ATTENTION = R(0x0e), + + TCM_RESERVATION_CONFLICT = R(0x10), + TCM_ADDRESS_OUT_OF_RANGE = R(0x11), + TCM_OUT_OF_RESOURCES = R(0x12), + TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), + TCM_MISCOMPARE_VERIFY = R(0x14), + TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED = R(0x15), + TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED = R(0x16), + TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED = R(0x17), + TCM_COPY_TARGET_DEVICE_NOT_REACHABLE = R(0x18), + TCM_TOO_MANY_TARGET_DESCS = R(0x19), + TCM_UNSUPPORTED_TARGET_DESC_TYPE_CODE = R(0x1a), + TCM_TOO_MANY_SEGMENT_DESCS = R(0x1b), + TCM_UNSUPPORTED_SEGMENT_DESC_TYPE_CODE = R(0x1c), + TCM_INSUFFICIENT_REGISTRATION_RESOURCES = R(0x1d), + TCM_LUN_BUSY = R(0x1e), + TCM_INVALID_FIELD_IN_COMMAND_IU = R(0x1f), + TCM_ALUA_TG_PT_STANDBY = R(0x20), + TCM_ALUA_TG_PT_UNAVAILABLE = R(0x21), + TCM_ALUA_STATE_TRANSITION = R(0x22), + TCM_ALUA_OFFLINE = R(0x23), +#undef R +}; + +enum target_sc_flags_table { + TARGET_SCF_BIDI_OP = 0x01, + TARGET_SCF_ACK_KREF = 0x02, + TARGET_SCF_UNKNOWN_SIZE = 0x04, + TARGET_SCF_USE_CPUID = 0x08, +}; + +/* fabric independent task management function values */ +enum tcm_tmreq_table { + TMR_ABORT_TASK = 1, + TMR_ABORT_TASK_SET = 2, + TMR_CLEAR_ACA = 3, + TMR_CLEAR_TASK_SET = 4, + TMR_LUN_RESET = 5, + TMR_TARGET_WARM_RESET = 6, + TMR_TARGET_COLD_RESET = 7, + TMR_LUN_RESET_PRO = 0x80, + TMR_UNKNOWN = 0xff, +}; + +/* fabric independent task management response values */ +enum tcm_tmrsp_table { + TMR_FUNCTION_FAILED = 0, + TMR_FUNCTION_COMPLETE = 1, + TMR_TASK_DOES_NOT_EXIST = 2, + TMR_LUN_DOES_NOT_EXIST = 3, + TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED = 4, + TMR_FUNCTION_REJECTED = 5, +}; + +/* + * Used for target SCSI statistics + */ +typedef enum { + SCSI_INST_INDEX, + SCSI_AUTH_INTR_INDEX, + SCSI_INDEX_TYPE_MAX +} scsi_index_t; + +struct se_cmd; + +struct t10_alua_lba_map_member { + struct list_head lba_map_mem_list; + int lba_map_mem_alua_state; + int lba_map_mem_alua_pg_id; +}; + +struct t10_alua_lba_map { + u64 lba_map_first_lba; + u64 lba_map_last_lba; + struct list_head lba_map_list; + struct list_head lba_map_mem_list; +}; + +struct t10_alua { + /* ALUA Target Port Group ID */ + u16 alua_tg_pt_gps_counter; + u32 alua_tg_pt_gps_count; + /* Referrals support */ + spinlock_t lba_map_lock; + u32 lba_map_segment_size; + u32 lba_map_segment_multiplier; + struct list_head lba_map_list; + spinlock_t tg_pt_gps_lock; + struct se_device *t10_dev; + /* Used for default ALUA Target Port Group */ + struct t10_alua_tg_pt_gp *default_tg_pt_gp; + /* Used for default ALUA Target Port Group ConfigFS group */ + struct config_group alua_tg_pt_gps_group; + struct list_head tg_pt_gps_list; +}; + +struct t10_alua_lu_gp { + u16 lu_gp_id; + int lu_gp_valid_id; + u32 lu_gp_members; + atomic_t lu_gp_ref_cnt; + spinlock_t lu_gp_lock; + struct config_group lu_gp_group; + struct list_head lu_gp_node; + struct list_head lu_gp_mem_list; +}; + +struct t10_alua_lu_gp_member { + bool lu_gp_assoc; + atomic_t lu_gp_mem_ref_cnt; + spinlock_t lu_gp_mem_lock; + struct t10_alua_lu_gp *lu_gp; + struct se_device *lu_gp_mem_dev; + struct list_head lu_gp_mem_list; +}; + +struct t10_alua_tg_pt_gp { + u16 tg_pt_gp_id; + int tg_pt_gp_valid_id; + int tg_pt_gp_alua_supported_states; + int tg_pt_gp_alua_access_status; + int tg_pt_gp_alua_access_type; + int tg_pt_gp_nonop_delay_msecs; + int tg_pt_gp_trans_delay_msecs; + int tg_pt_gp_implicit_trans_secs; + int tg_pt_gp_pref; + int tg_pt_gp_write_metadata; + u32 tg_pt_gp_members; + int tg_pt_gp_alua_access_state; + atomic_t tg_pt_gp_ref_cnt; + spinlock_t tg_pt_gp_lock; + struct mutex tg_pt_gp_transition_mutex; + struct se_device *tg_pt_gp_dev; + struct config_group tg_pt_gp_group; + struct list_head tg_pt_gp_list; + struct list_head tg_pt_gp_lun_list; + struct se_lun *tg_pt_gp_alua_lun; + struct se_node_acl *tg_pt_gp_alua_nacl; +}; + +struct t10_vpd { + unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN]; + int protocol_identifier_set; + u32 protocol_identifier; + u32 device_identifier_code_set; + u32 association; + u32 device_identifier_type; + struct list_head vpd_list; +}; + +struct t10_wwn { + /* + * SCSI left aligned strings may not be null terminated. +1 to ensure a + * null terminator is always present. + */ + char vendor[INQUIRY_VENDOR_LEN + 1]; + char model[INQUIRY_MODEL_LEN + 1]; + char revision[INQUIRY_REVISION_LEN + 1]; + char unit_serial[INQUIRY_VPD_SERIAL_LEN]; + u32 company_id; + spinlock_t t10_vpd_lock; + struct se_device *t10_dev; + struct config_group t10_wwn_group; + struct list_head t10_vpd_list; +}; + +struct t10_pr_registration { + /* Used for fabrics that contain WWN+ISID */ +#define PR_REG_ISID_LEN 16 + /* PR_REG_ISID_LEN + ',i,0x' */ +#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5) + char pr_reg_isid[PR_REG_ISID_LEN]; + /* Used during APTPL metadata reading */ +#define PR_APTPL_MAX_IPORT_LEN 256 + unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; + /* Used during APTPL metadata reading */ +#define PR_APTPL_MAX_TPORT_LEN 256 + unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; + u16 pr_aptpl_rpti; + u16 pr_reg_tpgt; + /* Reservation effects all target ports */ + int pr_reg_all_tg_pt; + /* Activate Persistence across Target Power Loss */ + int pr_reg_aptpl; + int pr_res_holder; + int pr_res_type; + int pr_res_scope; + /* Used for fabric initiator WWPNs using a ISID */ + bool isid_present_at_reg; + u64 pr_res_mapped_lun; + u64 pr_aptpl_target_lun; + u16 tg_pt_sep_rtpi; + u32 pr_res_generation; + u64 pr_reg_bin_isid; + u64 pr_res_key; + atomic_t pr_res_holders; + struct se_node_acl *pr_reg_nacl; + /* Used by ALL_TG_PT=1 registration with deve->pr_ref taken */ + struct se_dev_entry *pr_reg_deve; + struct list_head pr_reg_list; + struct list_head pr_reg_abort_list; + struct list_head pr_reg_aptpl_list; + struct list_head pr_reg_atp_list; + struct list_head pr_reg_atp_mem_list; +}; + +struct t10_reservation { + /* Reservation effects all target ports */ + int pr_all_tg_pt; + /* Activate Persistence across Target Power Loss enabled + * for SCSI device */ + int pr_aptpl_active; +#define PR_APTPL_BUF_LEN 262144 + u32 pr_generation; + spinlock_t registration_lock; + spinlock_t aptpl_reg_lock; + /* + * This will always be set by one individual I_T Nexus. + * However with all_tg_pt=1, other I_T Nexus from the + * same initiator can access PR reg/res info on a different + * target port. + * + * There is also the 'All Registrants' case, where there is + * a single *pr_res_holder of the reservation, but all + * registrations are considered reservation holders. + */ + struct se_node_acl *pr_res_holder; + struct list_head registration_list; + struct list_head aptpl_reg_list; +}; + +struct se_tmr_req { + /* Task Management function to be performed */ + u8 function; + /* Task Management response to send */ + u8 response; + int call_transport; + /* Reference to ITT that Task Mgmt should be performed */ + u64 ref_task_tag; + void *fabric_tmr_ptr; + struct se_cmd *task_cmd; + struct se_device *tmr_dev; + struct list_head tmr_list; +}; + +enum target_prot_op { + TARGET_PROT_NORMAL = 0, + TARGET_PROT_DIN_INSERT = (1 << 0), + TARGET_PROT_DOUT_INSERT = (1 << 1), + TARGET_PROT_DIN_STRIP = (1 << 2), + TARGET_PROT_DOUT_STRIP = (1 << 3), + TARGET_PROT_DIN_PASS = (1 << 4), + TARGET_PROT_DOUT_PASS = (1 << 5), +}; + +#define TARGET_PROT_ALL TARGET_PROT_DIN_INSERT | TARGET_PROT_DOUT_INSERT | \ + TARGET_PROT_DIN_STRIP | TARGET_PROT_DOUT_STRIP | \ + TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS + +enum target_prot_type { + TARGET_DIF_TYPE0_PROT, + TARGET_DIF_TYPE1_PROT, + TARGET_DIF_TYPE2_PROT, + TARGET_DIF_TYPE3_PROT, +}; + +/* Emulation for UNIT ATTENTION Interlock Control */ +enum target_ua_intlck_ctrl { + TARGET_UA_INTLCK_CTRL_CLEAR = 0, + TARGET_UA_INTLCK_CTRL_NO_CLEAR = 1, + TARGET_UA_INTLCK_CTRL_ESTABLISH_UA = 2, +}; + +enum target_core_dif_check { + TARGET_DIF_CHECK_GUARD = 0x1 << 0, + TARGET_DIF_CHECK_APPTAG = 0x1 << 1, + TARGET_DIF_CHECK_REFTAG = 0x1 << 2, +}; + +/* for sam_task_attr */ +#define TCM_SIMPLE_TAG 0x20 +#define TCM_HEAD_TAG 0x21 +#define TCM_ORDERED_TAG 0x22 +#define TCM_ACA_TAG 0x24 + +struct se_cmd { + /* Used for fail with specific sense codes */ + sense_reason_t sense_reason; + /* SAM response code being sent to initiator */ + u8 scsi_status; + u16 scsi_sense_length; + unsigned unknown_data_length:1; + bool state_active:1; + u64 tag; /* SAM command identifier aka task tag */ + /* Delay for ALUA Active/NonOptimized state access in milliseconds */ + int alua_nonop_delay; + /* See include/linux/dma-mapping.h */ + enum dma_data_direction data_direction; + /* For SAM Task Attribute */ + int sam_task_attr; + /* Used for se_sess->sess_tag_pool */ + unsigned int map_tag; + int map_cpu; + /* Transport protocol dependent state, see transport_state_table */ + enum transport_state_table t_state; + /* See se_cmd_flags_table */ + u32 se_cmd_flags; + /* Total size in bytes associated with command */ + u32 data_length; + u32 residual_count; + u64 orig_fe_lun; + /* Persistent Reservation key */ + u64 pr_res_key; + /* Used for sense data */ + void *sense_buffer; + struct list_head se_delayed_node; + struct list_head se_qf_node; + struct se_device *se_dev; + struct se_lun *se_lun; + /* Only used for internal passthrough and legacy TCM fabric modules */ + struct se_session *se_sess; + struct target_cmd_counter *cmd_cnt; + struct se_tmr_req *se_tmr_req; + struct llist_node se_cmd_list; + struct completion *free_compl; + struct completion *abrt_compl; + const struct target_core_fabric_ops *se_tfo; + sense_reason_t (*execute_cmd)(struct se_cmd *); + sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool, int *); + void *protocol_data; + + unsigned char *t_task_cdb; + unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; + unsigned long long t_task_lba; + unsigned int t_task_nolb; + unsigned int transport_state; +#define CMD_T_ABORTED (1 << 0) +#define CMD_T_ACTIVE (1 << 1) +#define CMD_T_COMPLETE (1 << 2) +#define CMD_T_SENT (1 << 4) +#define CMD_T_STOP (1 << 5) +#define CMD_T_TAS (1 << 10) +#define CMD_T_FABRIC_STOP (1 << 11) + spinlock_t t_state_lock; + struct kref cmd_kref; + struct completion t_transport_stop_comp; + + struct work_struct work; + + struct scatterlist *t_data_sg; + struct scatterlist *t_data_sg_orig; + unsigned int t_data_nents; + unsigned int t_data_nents_orig; + void *t_data_vmap; + struct scatterlist *t_bidi_data_sg; + unsigned int t_bidi_data_nents; + + /* Used for lun->lun_ref counting */ + int lun_ref_active; + + struct list_head state_list; + + /* backend private data */ + void *priv; + + /* DIF related members */ + enum target_prot_op prot_op; + enum target_prot_type prot_type; + u8 prot_checks; + bool prot_pto; + u32 prot_length; + u32 reftag_seed; + struct scatterlist *t_prot_sg; + unsigned int t_prot_nents; + sense_reason_t pi_err; + u64 sense_info; + /* + * CPU LIO will execute the cmd on. Defaults to the CPU the cmd is + * initialized on. Drivers can override. + */ + int cpuid; +}; + +struct se_ua { + u8 ua_asc; + u8 ua_ascq; + struct list_head ua_nacl_list; +}; + +struct se_node_acl { + char initiatorname[TRANSPORT_IQN_LEN]; + /* Used to signal demo mode created ACL, disabled by default */ + bool dynamic_node_acl; + bool dynamic_stop; + u32 queue_depth; + u32 acl_index; + enum target_prot_type saved_prot_type; +#define MAX_ACL_TAG_SIZE 64 + char acl_tag[MAX_ACL_TAG_SIZE]; + /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ + atomic_t acl_pr_ref_count; + struct hlist_head lun_entry_hlist; + struct se_session *nacl_sess; + struct se_portal_group *se_tpg; + struct mutex lun_entry_mutex; + spinlock_t nacl_sess_lock; + struct config_group acl_group; + struct config_group acl_attrib_group; + struct config_group acl_auth_group; + struct config_group acl_param_group; + struct config_group acl_fabric_stat_group; + struct list_head acl_list; + struct list_head acl_sess_list; + struct completion acl_free_comp; + struct kref acl_kref; +}; + +static inline struct se_node_acl *acl_to_nacl(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_node_acl, + acl_group); +} + +static inline struct se_node_acl *attrib_to_nacl(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_node_acl, + acl_attrib_group); +} + +static inline struct se_node_acl *auth_to_nacl(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_node_acl, + acl_auth_group); +} + +static inline struct se_node_acl *param_to_nacl(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_node_acl, + acl_param_group); +} + +static inline struct se_node_acl *fabric_stat_to_nacl(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_node_acl, + acl_fabric_stat_group); +} + +struct target_cmd_counter { + struct percpu_ref refcnt; + wait_queue_head_t refcnt_wq; + struct completion stop_done; + atomic_t stopped; +}; + +struct se_session { + u64 sess_bin_isid; + enum target_prot_op sup_prot_ops; + enum target_prot_type sess_prot_type; + struct se_node_acl *se_node_acl; + struct se_portal_group *se_tpg; + void *fabric_sess_ptr; + struct list_head sess_list; + struct list_head sess_acl_list; + spinlock_t sess_cmd_lock; + void *sess_cmd_map; + struct sbitmap_queue sess_tag_pool; + struct target_cmd_counter *cmd_cnt; +}; + +struct se_device; +struct se_transform_info; +struct scatterlist; + +struct se_ml_stat_grps { + struct config_group stat_group; + struct config_group scsi_auth_intr_group; + struct config_group scsi_att_intr_port_group; +}; + +struct se_lun_acl { + u64 mapped_lun; + struct se_node_acl *se_lun_nacl; + struct se_lun *se_lun; + struct config_group se_lun_group; + struct se_ml_stat_grps ml_stat_grps; +}; + +struct se_dev_entry { + u64 mapped_lun; + u64 pr_res_key; + u64 creation_time; + bool lun_access_ro; + u32 attach_count; + atomic_long_t total_cmds; + atomic_long_t read_bytes; + atomic_long_t write_bytes; + /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ + struct kref pr_kref; + struct completion pr_comp; + struct se_lun_acl *se_lun_acl; + spinlock_t ua_lock; + struct se_lun *se_lun; +#define DEF_PR_REG_ACTIVE 1 + unsigned long deve_flags; + struct list_head alua_port_list; + struct list_head lun_link; + struct list_head ua_list; + struct hlist_node link; + struct rcu_head rcu_head; +}; + +struct se_dev_attrib { + bool emulate_model_alias; + bool emulate_dpo; /* deprecated */ + bool emulate_fua_write; + bool emulate_fua_read; /* deprecated */ + bool emulate_write_cache; + enum target_ua_intlck_ctrl emulate_ua_intlck_ctrl; + bool emulate_tas; + bool emulate_tpu; + bool emulate_tpws; + bool emulate_caw; + bool emulate_3pc; + bool emulate_pr; + enum target_prot_type pi_prot_type; + enum target_prot_type hw_pi_prot_type; + bool pi_prot_verify; + bool enforce_pr_isids; + bool force_pr_aptpl; + bool is_nonrot; + bool emulate_rest_reord; + bool unmap_zeroes_data; + u32 hw_block_size; + u32 block_size; + u32 hw_max_sectors; + u32 optimal_sectors; + u32 hw_queue_depth; + u32 queue_depth; + u32 max_unmap_lba_count; + u32 max_unmap_block_desc_count; + u32 unmap_granularity; + u32 unmap_granularity_alignment; + u32 max_write_same_len; + u32 max_bytes_per_io; + struct se_device *da_dev; + struct config_group da_group; +}; + +struct se_port_stat_grps { + struct config_group stat_group; + struct config_group scsi_port_group; + struct config_group scsi_tgt_port_group; + struct config_group scsi_transport_group; +}; + +struct scsi_port_stats { + atomic_long_t cmd_pdus; + atomic_long_t tx_data_octets; + atomic_long_t rx_data_octets; +}; + +struct se_lun { + u64 unpacked_lun; + bool lun_shutdown; + bool lun_access_ro; + u32 lun_index; + + /* RELATIVE TARGET PORT IDENTIFER */ + u16 lun_rtpi; + atomic_t lun_acl_count; + struct se_device __rcu *lun_se_dev; + + struct list_head lun_deve_list; + spinlock_t lun_deve_lock; + + /* ALUA state */ + int lun_tg_pt_secondary_stat; + int lun_tg_pt_secondary_write_md; + atomic_t lun_tg_pt_secondary_offline; + struct mutex lun_tg_pt_md_mutex; + + /* ALUA target port group linkage */ + struct list_head lun_tg_pt_gp_link; + struct t10_alua_tg_pt_gp __rcu *lun_tg_pt_gp; + spinlock_t lun_tg_pt_gp_lock; + + struct se_portal_group *lun_tpg; + struct scsi_port_stats lun_stats; + struct config_group lun_group; + struct se_port_stat_grps port_stat_grps; + struct completion lun_shutdown_comp; + struct percpu_ref lun_ref; + struct list_head lun_dev_link; + struct hlist_node link; + struct rcu_head rcu_head; +}; + +struct se_dev_stat_grps { + struct config_group stat_group; + struct config_group scsi_dev_group; + struct config_group scsi_tgt_dev_group; + struct config_group scsi_lu_group; +}; + +struct se_cmd_queue { + struct llist_head cmd_list; + struct work_struct work; +}; + +struct se_dev_plug { + struct se_device *se_dev; +}; + +struct se_device_queue { + struct list_head state_list; + spinlock_t lock; + struct se_cmd_queue sq; +}; + +struct se_device { + /* RELATIVE TARGET PORT IDENTIFER Counter */ + u16 dev_rpti_counter; + /* Used for SAM Task Attribute ordering */ + u32 dev_cur_ordered_id; + u32 dev_flags; +#define DF_CONFIGURED 0x00000001 +#define DF_FIRMWARE_VPD_UNIT_SERIAL 0x00000002 +#define DF_EMULATED_VPD_UNIT_SERIAL 0x00000004 +#define DF_USING_UDEV_PATH 0x00000008 +#define DF_USING_ALIAS 0x00000010 +#define DF_READ_ONLY 0x00000020 + u8 transport_flags; + /* Physical device queue depth */ + u32 queue_depth; + /* Used for SPC-2 reservations enforce of ISIDs */ + u64 dev_res_bin_isid; + /* Pointer to transport specific device structure */ + u32 dev_index; + u64 creation_time; + atomic_long_t num_resets; + atomic_long_t aborts_complete; + atomic_long_t aborts_no_task; + atomic_long_t num_cmds; + atomic_long_t read_bytes; + atomic_long_t write_bytes; + /* Active commands on this virtual SE device */ + atomic_t non_ordered; + bool ordered_sync_in_progress; + atomic_t delayed_cmd_count; + atomic_t dev_qf_count; + u32 export_count; + spinlock_t delayed_cmd_lock; + spinlock_t dev_reservation_lock; + unsigned int dev_reservation_flags; +#define DRF_SPC2_RESERVATIONS 0x00000001 +#define DRF_SPC2_RESERVATIONS_WITH_ISID 0x00000002 + spinlock_t se_port_lock; + spinlock_t se_tmr_lock; + spinlock_t qf_cmd_lock; + struct semaphore caw_sem; + /* Used for legacy SPC-2 reservations */ + struct se_session *reservation_holder; + /* Used for ALUA Logical Unit Group membership */ + struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem; + /* Used for SPC-3 Persistent Reservations */ + struct t10_pr_registration *dev_pr_res_holder; + struct list_head dev_sep_list; + struct list_head dev_tmr_list; + struct work_struct qf_work_queue; + struct work_struct delayed_cmd_work; + struct list_head delayed_cmd_list; + struct list_head qf_cmd_list; + /* Pointer to associated SE HBA */ + struct se_hba *se_hba; + /* T10 Inquiry and VPD WWN Information */ + struct t10_wwn t10_wwn; + /* T10 Asymmetric Logical Unit Assignment for Target Ports */ + struct t10_alua t10_alua; + /* T10 SPC-2 + SPC-3 Reservations */ + struct t10_reservation t10_pr; + struct se_dev_attrib dev_attrib; + struct config_group dev_action_group; + struct config_group dev_group; + struct config_group dev_pr_group; + struct se_dev_stat_grps dev_stat_grps; +#define SE_DEV_ALIAS_LEN 512 /* must be less than PAGE_SIZE */ + unsigned char dev_alias[SE_DEV_ALIAS_LEN]; +#define SE_UDEV_PATH_LEN 512 /* must be less than PAGE_SIZE */ + unsigned char udev_path[SE_UDEV_PATH_LEN]; + /* Pointer to template of function pointers for transport */ + const struct target_backend_ops *transport; + struct se_lun xcopy_lun; + /* Protection Information */ + int prot_length; + /* For se_lun->lun_se_dev RCU read-side critical access */ + u32 hba_index; + struct rcu_head rcu_head; + int queue_cnt; + struct se_device_queue *queues; + struct mutex lun_reset_mutex; +}; + +struct se_hba { + u16 hba_tpgt; + u32 hba_id; + /* See hba_flags_table */ + u32 hba_flags; + /* Virtual iSCSI devices attached. */ + u32 dev_count; + u32 hba_index; + /* Pointer to transport specific host structure. */ + void *hba_ptr; + struct list_head hba_node; + spinlock_t device_lock; + struct config_group hba_group; + struct mutex hba_access_mutex; + struct target_backend *backend; +}; + +struct se_tpg_np { + struct se_portal_group *tpg_np_parent; + struct config_group tpg_np_group; +}; + +static inline struct se_tpg_np *to_tpg_np(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_tpg_np, + tpg_np_group); +} + +struct se_portal_group { + /* + * PROTOCOL IDENTIFIER value per SPC4, 7.5.1. + * + * Negative values can be used by fabric drivers for internal use TPGs. + */ + int proto_id; + bool enabled; + /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ + atomic_t tpg_pr_ref_count; + /* Spinlock for adding/removing ACLed Nodes */ + struct mutex acl_node_mutex; + /* Spinlock for adding/removing sessions */ + spinlock_t session_lock; + struct mutex tpg_lun_mutex; + /* linked list for initiator ACL list */ + struct list_head acl_node_list; + struct hlist_head tpg_lun_hlist; + struct se_lun *tpg_virt_lun0; + /* List of TCM sessions associated wth this TPG */ + struct list_head tpg_sess_list; + /* Pointer to $FABRIC_MOD dependent code */ + const struct target_core_fabric_ops *se_tpg_tfo; + struct se_wwn *se_tpg_wwn; + struct config_group tpg_group; + struct config_group tpg_lun_group; + struct config_group tpg_np_group; + struct config_group tpg_acl_group; + struct config_group tpg_attrib_group; + struct config_group tpg_auth_group; + struct config_group tpg_param_group; +}; + +static inline struct se_portal_group *to_tpg(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_portal_group, + tpg_group); +} + +static inline struct se_portal_group *attrib_to_tpg(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_portal_group, + tpg_attrib_group); +} + +static inline struct se_portal_group *auth_to_tpg(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_portal_group, + tpg_auth_group); +} + +static inline struct se_portal_group *param_to_tpg(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_portal_group, + tpg_param_group); +} + +enum { + /* Use se_cmd's cpuid for completion */ + SE_COMPL_AFFINITY_CPUID = -1, + /* Complete on current CPU */ + SE_COMPL_AFFINITY_CURR_CPU = -2, +}; + +struct se_wwn { + struct target_fabric_configfs *wwn_tf; + void *priv; + struct config_group wwn_group; + struct config_group fabric_stat_group; + struct config_group param_group; + int cmd_compl_affinity; +}; + +static inline void atomic_inc_mb(atomic_t *v) +{ + smp_mb__before_atomic(); + atomic_inc(v); + smp_mb__after_atomic(); +} + +static inline void atomic_dec_mb(atomic_t *v) +{ + smp_mb__before_atomic(); + atomic_dec(v); + smp_mb__after_atomic(); +} + +static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd) +{ + sbitmap_queue_clear(&sess->sess_tag_pool, cmd->map_tag, cmd->map_cpu); +} + +#endif /* TARGET_CORE_BASE_H */ |