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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /include/target/target_core_base.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/target/target_core_base.h')
-rw-r--r--include/target/target_core_base.h996
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 */