Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target updates from Nicholas Bellinger:
 "It's been a busy development cycle for target-core in a number of
  different areas.

  The fabric API usage for se_node_acl allocation is now within
  target-core code, dropping the external API callers for all fabric
  drivers tree-wide.

  There is a new conversion to RCU hlists for se_node_acl and
  se_portal_group LUN mappings, that turns fast-past LUN lookup into a
  completely lockless code-path.  It also removes the original
  hard-coded limitation of 256 LUNs per fabric endpoint.

  The configfs attributes for backends can now be shared between core
  and driver code, allowing existing drivers to use common code while
  still allowing flexibility for new backend provided attributes.

  The highlights include:

   - Merge sbc_verify_dif_* into common code (sagi)
   - Remove iscsi-target support for obsolete IFMarker/OFMarker
     (Christophe Vu-Brugier)
   - Add bidi support in target/user backend (ilias + vangelis + agover)
   - Move se_node_acl allocation into target-core code (hch)
   - Add crc_t10dif_update common helper (akinobu + mkp)
   - Handle target-core odd SGL mapping for data transfer memory
     (akinobu)
   - Move transport ID handling into target-core (hch)
   - Move task tag into struct se_cmd + support 64-bit tags (bart)
   - Convert se_node_acl->device_list[] to RCU hlist (nab + hch +
     paulmck)
   - Convert se_portal_group->tpg_lun_list[] to RCU hlist (nab + hch +
     paulmck)
   - Simplify target backend driver registration (hch)
   - Consolidate + simplify target backend attribute implementations
     (hch + nab)
   - Subsume se_port + t10_alua_tg_pt_gp_member into se_lun (hch)
   - Drop lun_sep_lock for se_lun->lun_se_dev RCU usage (hch + nab)
   - Drop unnecessary core_tpg_register TFO parameter (nab)
   - Use 64-bit LUNs tree-wide (hannes)
   - Drop left-over TARGET_MAX_LUNS_PER_TRANSPORT limit (hannes)"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (76 commits)
  target: Bump core version to v5.0
  target: remove target_core_configfs.h
  target: remove unused TARGET_CORE_CONFIG_ROOT define
  target: consolidate version defines
  target: implement WRITE_SAME with UNMAP bit using ->execute_unmap
  target: simplify UNMAP handling
  target: replace se_cmd->execute_rw with a protocol_data field
  target/user: Fix inconsistent kmap_atomic/kunmap_atomic
  target: Send UA when changing LUN inventory
  target: Send UA upon LUN RESET tmr completion
  target: Send UA on ALUA target port group change
  target: Convert se_lun->lun_deve_lock to normal spinlock
  target: use 'se_dev_entry' when allocating UAs
  target: Remove 'ua_nacl' pointer from se_ua structure
  target_core_alua: Correct UA handling when switching states
  xen-scsiback: Fix compile warning for 64-bit LUN
  target: Remove TARGET_MAX_LUNS_PER_TRANSPORT
  target: use 64-bit LUNs
  target: Drop duplicate + unused se_dev_check_wce
  target: Drop unnecessary core_tpg_register TFO parameter
  ...

6 files changed, 104 insertions, 403 deletions

diff --git a/include/target/iscsi/iscsi_target_core.h b/include/target/iscsi/iscsi_target_core.h
index 006983b296dd..34117b8b72e4 100644
--- a/include/target/iscsi/iscsi_target_core.h
+++ b/include/target/iscsi/iscsi_target_core.h
@@ -247,10 +247,6 @@ struct iscsi_conn_ops {
 	u8	DataDigest;			/* [0,1] == [None,CRC32C] */
 	u32	MaxRecvDataSegmentLength;	/* [512..2**24-1] */
 	u32	MaxXmitDataSegmentLength;	/* [512..2**24-1] */
-	u8	OFMarker;			/* [0,1] == [No,Yes] */
-	u8	IFMarker;			/* [0,1] == [No,Yes] */
-	u32	OFMarkInt;			/* [1..65535] */
-	u32	IFMarkInt;			/* [1..65535] */
 	/*
 	 * iSER specific connection parameters
 	 */
@@ -531,12 +527,6 @@ struct iscsi_conn {
 	u32			exp_statsn;
 	/* Per connection status sequence number */
 	u32			stat_sn;
-	/* IFMarkInt's Current Value */
-	u32			if_marker;
-	/* OFMarkInt's Current Value */
-	u32			of_marker;
-	/* Used for calculating OFMarker offset to next PDU */
-	u32			of_marker_offset;
 #define IPV6_ADDRESS_SPACE				48
 	unsigned char		login_ip[IPV6_ADDRESS_SPACE];
 	unsigned char		local_ip[IPV6_ADDRESS_SPACE];
@@ -754,10 +744,10 @@ struct iscsi_node_stat_grps {
 };
 
 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 se_node_acl	se_node_acl;
 };
 
 struct iscsi_tpg_attrib {
diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h
index 5f1225706993..1e5c8f949bae 100644
--- a/include/target/target_core_backend.h
+++ b/include/target/target_core_backend.h
@@ -3,18 +3,7 @@
 
 #define TRANSPORT_FLAG_PASSTHROUGH		1
 
-struct target_backend_cits {
-	struct config_item_type tb_dev_cit;
-	struct config_item_type tb_dev_attrib_cit;
-	struct config_item_type tb_dev_pr_cit;
-	struct config_item_type tb_dev_wwn_cit;
-	struct config_item_type tb_dev_alua_tg_pt_gps_cit;
-	struct config_item_type tb_dev_stat_cit;
-};
-
-struct se_subsystem_api {
-	struct list_head sub_api_list;
-
+struct target_backend_ops {
 	char name[16];
 	char inquiry_prod[16];
 	char inquiry_rev[4];
@@ -52,7 +41,7 @@ struct se_subsystem_api {
 	int (*format_prot)(struct se_device *);
 	void (*free_prot)(struct se_device *);
 
-	struct target_backend_cits tb_cits;
+	struct configfs_attribute **tb_dev_attrib_attrs;
 };
 
 struct sbc_ops {
@@ -60,12 +49,12 @@ struct sbc_ops {
 				     u32, enum dma_data_direction);
 	sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd);
 	sense_reason_t (*execute_write_same)(struct se_cmd *cmd);
-	sense_reason_t (*execute_write_same_unmap)(struct se_cmd *cmd);
-	sense_reason_t (*execute_unmap)(struct se_cmd *cmd);
+	sense_reason_t (*execute_unmap)(struct se_cmd *cmd,
+				sector_t lba, sector_t nolb);
 };
 
-int	transport_subsystem_register(struct se_subsystem_api *);
-void	transport_subsystem_release(struct se_subsystem_api *);
+int	transport_backend_register(const struct target_backend_ops *);
+void	target_backend_unregister(const struct target_backend_ops *);
 
 void	target_complete_cmd(struct se_cmd *, u8);
 void	target_complete_cmd_with_length(struct se_cmd *, u8, int);
@@ -79,22 +68,19 @@ sense_reason_t	sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops);
 u32	sbc_get_device_rev(struct se_device *dev);
 u32	sbc_get_device_type(struct se_device *dev);
 sector_t	sbc_get_write_same_sectors(struct se_cmd *cmd);
-sense_reason_t sbc_execute_unmap(struct se_cmd *cmd,
-	sense_reason_t (*do_unmap_fn)(struct se_cmd *cmd, void *priv,
-				      sector_t lba, sector_t nolb),
-	void *priv);
 void	sbc_dif_generate(struct se_cmd *);
-sense_reason_t	sbc_dif_verify_write(struct se_cmd *, sector_t, unsigned int,
+sense_reason_t	sbc_dif_verify(struct se_cmd *, sector_t, unsigned int,
 				     unsigned int, struct scatterlist *, int);
-sense_reason_t	sbc_dif_verify_read(struct se_cmd *, sector_t, unsigned int,
-				    unsigned int, struct scatterlist *, int);
-sense_reason_t	sbc_dif_read_strip(struct se_cmd *);
-
+void sbc_dif_copy_prot(struct se_cmd *, unsigned int, bool,
+		       struct scatterlist *, int);
 void	transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
 int	transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
 int	transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
 int	transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
 
+extern struct configfs_attribute *sbc_attrib_attrs[];
+extern struct configfs_attribute *passthrough_attrib_attrs[];
+
 /* core helpers also used by command snooping in pscsi */
 void	*transport_kmap_data_sg(struct se_cmd *);
 void	transport_kunmap_data_sg(struct se_cmd *);
@@ -103,39 +89,7 @@ int	target_alloc_sgl(struct scatterlist **, unsigned int *, u32, bool);
 sense_reason_t	transport_generic_map_mem_to_cmd(struct se_cmd *,
 		struct scatterlist *, u32, struct scatterlist *, u32);
 
-void	array_free(void *array, int n);
-
-/* From target_core_configfs.c to setup default backend config_item_types */
-void	target_core_setup_sub_cits(struct se_subsystem_api *);
-
-/* attribute helpers from target_core_device.c for backend drivers */
-bool	se_dev_check_wce(struct se_device *);
-int	se_dev_set_max_unmap_lba_count(struct se_device *, u32);
-int	se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
-int	se_dev_set_unmap_granularity(struct se_device *, u32);
-int	se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
-int	se_dev_set_max_write_same_len(struct se_device *, u32);
-int	se_dev_set_emulate_model_alias(struct se_device *, int);
-int	se_dev_set_emulate_dpo(struct se_device *, int);
-int	se_dev_set_emulate_fua_write(struct se_device *, int);
-int	se_dev_set_emulate_fua_read(struct se_device *, int);
-int	se_dev_set_emulate_write_cache(struct se_device *, int);
-int	se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
-int	se_dev_set_emulate_tas(struct se_device *, int);
-int	se_dev_set_emulate_tpu(struct se_device *, int);
-int	se_dev_set_emulate_tpws(struct se_device *, int);
-int	se_dev_set_emulate_caw(struct se_device *, int);
-int	se_dev_set_emulate_3pc(struct se_device *, int);
-int	se_dev_set_pi_prot_type(struct se_device *, int);
-int	se_dev_set_pi_prot_format(struct se_device *, int);
-int	se_dev_set_enforce_pr_isids(struct se_device *, int);
-int	se_dev_set_force_pr_aptpl(struct se_device *, int);
-int	se_dev_set_is_nonrot(struct se_device *, int);
-int	se_dev_set_emulate_rest_reord(struct se_device *dev, int);
-int	se_dev_set_queue_depth(struct se_device *, u32);
-int	se_dev_set_max_sectors(struct se_device *, u32);
-int	se_dev_set_optimal_sectors(struct se_device *, u32);
-int	se_dev_set_block_size(struct se_device *, u32);
+bool	target_lun_is_rdonly(struct se_cmd *);
 sense_reason_t passthrough_parse_cdb(struct se_cmd *cmd,
 	sense_reason_t (*exec_cmd)(struct se_cmd *cmd));
 
diff --git a/include/target/target_core_backend_configfs.h b/include/target/target_core_backend_configfs.h
deleted file mode 100644
index 186f7a923570..000000000000
--- a/include/target/target_core_backend_configfs.h
+++ /dev/null
@@ -1,118 +0,0 @@
-#ifndef TARGET_CORE_BACKEND_CONFIGFS_H
-#define TARGET_CORE_BACKEND_CONFIGFS_H
-
-#include <target/configfs_macros.h>
-
-#define DEF_TB_DEV_ATTRIB_SHOW(_backend, _name)				\
-static ssize_t _backend##_dev_show_attr_##_name(			\
-	struct se_dev_attrib *da,					\
-	char *page)							\
-{									\
-	return snprintf(page, PAGE_SIZE, "%u\n",			\
-			(u32)da->da_dev->dev_attrib._name);		\
-}
-
-#define DEF_TB_DEV_ATTRIB_STORE(_backend, _name)			\
-static ssize_t _backend##_dev_store_attr_##_name(			\
-	struct se_dev_attrib *da,					\
-	const char *page,						\
-	size_t count)							\
-{									\
-	unsigned long val;						\
-	int ret;							\
-									\
-	ret = kstrtoul(page, 0, &val);					\
-	if (ret < 0) {							\
-		pr_err("kstrtoul() failed with ret: %d\n", ret);	\
-		return -EINVAL;						\
-	}								\
-	ret = se_dev_set_##_name(da->da_dev, (u32)val);			\
-									\
-	return (!ret) ? count : -EINVAL;				\
-}
-
-#define DEF_TB_DEV_ATTRIB(_backend, _name)				\
-DEF_TB_DEV_ATTRIB_SHOW(_backend, _name);				\
-DEF_TB_DEV_ATTRIB_STORE(_backend, _name);
-
-#define DEF_TB_DEV_ATTRIB_RO(_backend, name)				\
-DEF_TB_DEV_ATTRIB_SHOW(_backend, name);
-
-CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
-#define TB_DEV_ATTR(_backend, _name, _mode)				\
-static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
-		__CONFIGFS_EATTR(_name, _mode,				\
-		_backend##_dev_show_attr_##_name,			\
-		_backend##_dev_store_attr_##_name);
-
-#define TB_DEV_ATTR_RO(_backend, _name)						\
-static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
-	__CONFIGFS_EATTR_RO(_name,					\
-	_backend##_dev_show_attr_##_name);
-
-/*
- * Default list of target backend device attributes as defined by
- * struct se_dev_attrib
- */
-
-#define DEF_TB_DEFAULT_ATTRIBS(_backend)				\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_model_alias);		\
-	TB_DEV_ATTR(_backend, emulate_model_alias, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_dpo);			\
-	TB_DEV_ATTR(_backend, emulate_dpo, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_fua_write);			\
-	TB_DEV_ATTR(_backend, emulate_fua_write, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_fua_read);			\
-	TB_DEV_ATTR(_backend, emulate_fua_read, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_write_cache);		\
-	TB_DEV_ATTR(_backend, emulate_write_cache, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_ua_intlck_ctrl);		\
-	TB_DEV_ATTR(_backend, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); \
-	DEF_TB_DEV_ATTRIB(_backend, emulate_tas);			\
-	TB_DEV_ATTR(_backend, emulate_tas, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_tpu);			\
-	TB_DEV_ATTR(_backend, emulate_tpu, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_tpws);			\
-	TB_DEV_ATTR(_backend, emulate_tpws, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_caw);			\
-	TB_DEV_ATTR(_backend, emulate_caw, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_3pc);			\
-	TB_DEV_ATTR(_backend, emulate_3pc, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, pi_prot_type);			\
-	TB_DEV_ATTR(_backend, pi_prot_type, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB_RO(_backend, hw_pi_prot_type);		\
-	TB_DEV_ATTR_RO(_backend, hw_pi_prot_type);			\
-	DEF_TB_DEV_ATTRIB(_backend, pi_prot_format);			\
-	TB_DEV_ATTR(_backend, pi_prot_format, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, enforce_pr_isids);			\
-	TB_DEV_ATTR(_backend, enforce_pr_isids, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, is_nonrot);				\
-	TB_DEV_ATTR(_backend, is_nonrot, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, emulate_rest_reord);		\
-	TB_DEV_ATTR(_backend, emulate_rest_reord, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, force_pr_aptpl);			\
-	TB_DEV_ATTR(_backend, force_pr_aptpl, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB_RO(_backend, hw_block_size);			\
-	TB_DEV_ATTR_RO(_backend, hw_block_size);			\
-	DEF_TB_DEV_ATTRIB(_backend, block_size);			\
-	TB_DEV_ATTR(_backend, block_size, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB_RO(_backend, hw_max_sectors);			\
-	TB_DEV_ATTR_RO(_backend, hw_max_sectors);			\
-	DEF_TB_DEV_ATTRIB(_backend, optimal_sectors);			\
-	TB_DEV_ATTR(_backend, optimal_sectors, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB_RO(_backend, hw_queue_depth);			\
-	TB_DEV_ATTR_RO(_backend, hw_queue_depth);			\
-	DEF_TB_DEV_ATTRIB(_backend, queue_depth);			\
-	TB_DEV_ATTR(_backend, queue_depth, S_IRUGO | S_IWUSR);		\
-	DEF_TB_DEV_ATTRIB(_backend, max_unmap_lba_count);		\
-	TB_DEV_ATTR(_backend, max_unmap_lba_count, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, max_unmap_block_desc_count);	\
-	TB_DEV_ATTR(_backend, max_unmap_block_desc_count, S_IRUGO | S_IWUSR); \
-	DEF_TB_DEV_ATTRIB(_backend, unmap_granularity);			\
-	TB_DEV_ATTR(_backend, unmap_granularity, S_IRUGO | S_IWUSR);	\
-	DEF_TB_DEV_ATTRIB(_backend, unmap_granularity_alignment);	\
-	TB_DEV_ATTR(_backend, unmap_granularity_alignment, S_IRUGO | S_IWUSR); \
-	DEF_TB_DEV_ATTRIB(_backend, max_write_same_len);		\
-	TB_DEV_ATTR(_backend, max_write_same_len, S_IRUGO | S_IWUSR);
-
-#endif /* TARGET_CORE_BACKEND_CONFIGFS_H */
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index aec6f6a4477c..17ae2d6a4891 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -9,12 +9,8 @@
 #include <net/sock.h>
 #include <net/tcp.h>
 
-#define TARGET_CORE_MOD_VERSION		"v4.1.0"
-#define TARGET_CORE_VERSION		TARGET_CORE_MOD_VERSION
+#define TARGET_CORE_VERSION		"v5.0"
 
-/* Maximum Number of LUNs per Target Portal Group */
-/* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */
-#define TRANSPORT_MAX_LUNS_PER_TPG		256
 /*
  * Maximum size of a CDB that can be stored in se_cmd without allocating
  * memory dynamically for the CDB.
@@ -70,12 +66,6 @@
 #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 Direct Page Out */
-#define DA_EMULATE_DPO				0
-/* Emulation for Forced Unit Access WRITEs */
-#define DA_EMULATE_FUA_WRITE			1
-/* Emulation for Forced Unit Access READs */
-#define DA_EMULATE_FUA_READ			0
 /* Emulation for WriteCache and SYNCHRONIZE_CACHE */
 #define DA_EMULATE_WRITE_CACHE			0
 /* Emulation for UNIT ATTENTION Interlock Control */
@@ -116,18 +106,6 @@ enum hba_flags_table {
 	HBA_FLAGS_PSCSI_MODE	= 0x02,
 };
 
-/* struct se_lun->lun_status */
-enum transport_lun_status_table {
-	TRANSPORT_LUN_STATUS_FREE = 0,
-	TRANSPORT_LUN_STATUS_ACTIVE = 1,
-};
-
-/* struct se_portal_group->se_tpg_type */
-enum transport_tpg_type_table {
-	TRANSPORT_TPG_TYPE_NORMAL = 0,
-	TRANSPORT_TPG_TYPE_DISCOVERY = 1,
-};
-
 /* Special transport agnostic struct se_cmd->t_states */
 enum transport_state_table {
 	TRANSPORT_NO_STATE	= 0,
@@ -158,14 +136,13 @@ enum se_cmd_flags_table {
 	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00020000,
 	SCF_COMPARE_AND_WRITE		= 0x00080000,
 	SCF_COMPARE_AND_WRITE_POST	= 0x00100000,
+	SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
 };
 
 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
 enum transport_lunflags_table {
-	TRANSPORT_LUNFLAGS_NO_ACCESS		= 0x00,
-	TRANSPORT_LUNFLAGS_INITIATOR_ACCESS	= 0x01,
-	TRANSPORT_LUNFLAGS_READ_ONLY		= 0x02,
-	TRANSPORT_LUNFLAGS_READ_WRITE		= 0x04,
+	TRANSPORT_LUNFLAGS_READ_ONLY		= 0x01,
+	TRANSPORT_LUNFLAGS_READ_WRITE		= 0x02,
 };
 
 /*
@@ -314,22 +291,13 @@ struct t10_alua_tg_pt_gp {
 	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_mem_list;
-	struct se_port *tg_pt_gp_alua_port;
+	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 delayed_work tg_pt_gp_transition_work;
 	struct completion *tg_pt_gp_transition_complete;
 };
 
-struct t10_alua_tg_pt_gp_member {
-	bool tg_pt_gp_assoc;
-	atomic_t tg_pt_gp_mem_ref_cnt;
-	spinlock_t tg_pt_gp_mem_lock;
-	struct t10_alua_tg_pt_gp *tg_pt_gp;
-	struct se_port *tg_pt;
-	struct list_head tg_pt_gp_mem_list;
-};
-
 struct t10_vpd {
 	unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
 	int protocol_identifier_set;
@@ -374,15 +342,16 @@ struct t10_pr_registration {
 	int pr_res_scope;
 	/* Used for fabric initiator WWPNs using a ISID */
 	bool isid_present_at_reg;
-	u32 pr_res_mapped_lun;
-	u32 pr_aptpl_target_lun;
+	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 se_lun *pr_reg_tg_pt_lun;
 	struct list_head pr_reg_list;
 	struct list_head pr_reg_abort_list;
 	struct list_head pr_reg_aptpl_list;
@@ -422,7 +391,7 @@ struct se_tmr_req {
 	u8			response;
 	int			call_transport;
 	/* Reference to ITT that Task Mgmt should be performed */
-	u32			ref_task_tag;
+	u64			ref_task_tag;
 	void 			*fabric_tmr_ptr;
 	struct se_cmd		*task_cmd;
 	struct se_device	*tmr_dev;
@@ -475,6 +444,7 @@ struct se_cmd {
 	u8			scsi_asc;
 	u8			scsi_ascq;
 	u16			scsi_sense_length;
+	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 */
@@ -493,7 +463,7 @@ struct se_cmd {
 	/* Total size in bytes associated with command */
 	u32			data_length;
 	u32			residual_count;
-	u32			orig_fe_lun;
+	u64			orig_fe_lun;
 	/* Persistent Reservation key */
 	u64			pr_res_key;
 	/* Used for sense data */
@@ -501,7 +471,6 @@ struct se_cmd {
 	struct list_head	se_delayed_node;
 	struct list_head	se_qf_node;
 	struct se_device      *se_dev;
-	struct se_dev_entry   *se_deve;
 	struct se_lun		*se_lun;
 	/* Only used for internal passthrough and legacy TCM fabric modules */
 	struct se_session	*se_sess;
@@ -511,9 +480,8 @@ struct se_cmd {
 	struct kref		cmd_kref;
 	const struct target_core_fabric_ops *se_tfo;
 	sense_reason_t		(*execute_cmd)(struct se_cmd *);
-	sense_reason_t		(*execute_rw)(struct se_cmd *, struct scatterlist *,
-					      u32, enum dma_data_direction);
 	sense_reason_t (*transport_complete_callback)(struct se_cmd *, bool);
+	void			*protocol_data;
 
 	unsigned char		*t_task_cdb;
 	unsigned char		__t_task_cdb[TCM_MAX_COMMAND_SIZE];
@@ -569,7 +537,6 @@ struct se_cmd {
 struct se_ua {
 	u8			ua_asc;
 	u8			ua_ascq;
-	struct se_node_acl	*ua_nacl;
 	struct list_head	ua_nacl_list;
 };
 
@@ -585,10 +552,10 @@ struct se_node_acl {
 	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 se_dev_entry	**device_list;
+	struct hlist_head	lun_entry_hlist;
 	struct se_session	*nacl_sess;
 	struct se_portal_group *se_tpg;
-	spinlock_t		device_list_lock;
+	struct mutex		lun_entry_mutex;
 	spinlock_t		nacl_sess_lock;
 	struct config_group	acl_group;
 	struct config_group	acl_attrib_group;
@@ -632,33 +599,37 @@ struct se_ml_stat_grps {
 
 struct se_lun_acl {
 	char			initiatorname[TRANSPORT_IQN_LEN];
-	u32			mapped_lun;
+	u64			mapped_lun;
 	struct se_node_acl	*se_lun_nacl;
 	struct se_lun		*se_lun;
-	struct list_head	lacl_list;
 	struct config_group	se_lun_group;
 	struct se_ml_stat_grps	ml_stat_grps;
 };
 
 struct se_dev_entry {
-	bool			def_pr_registered;
 	/* See transport_lunflags_table */
-	u32			lun_flags;
-	u32			mapped_lun;
-	u32			total_cmds;
+	u64			mapped_lun;
 	u64			pr_res_key;
 	u64			creation_time;
+	u32			lun_flags;
 	u32			attach_count;
-	u64			read_bytes;
-	u64			write_bytes;
+	atomic_long_t		total_cmds;
+	atomic_long_t		read_bytes;
+	atomic_long_t		write_bytes;
 	atomic_t		ua_count;
 	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
-	atomic_t		pr_ref_count;
-	struct se_lun_acl	*se_lun_acl;
+	struct kref		pr_kref;
+	struct completion	pr_comp;
+	struct se_lun_acl __rcu	*se_lun_acl;
 	spinlock_t		ua_lock;
-	struct se_lun		*se_lun;
+	struct se_lun __rcu	*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 {
@@ -703,25 +674,48 @@ struct se_port_stat_grps {
 	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;
 #define SE_LUN_LINK_MAGIC			0xffff7771
 	u32			lun_link_magic;
-	/* See transport_lun_status_table */
-	enum transport_lun_status_table lun_status;
 	u32			lun_access;
 	u32			lun_flags;
-	u32			unpacked_lun;
+	u32			lun_index;
+
+	/* RELATIVE TARGET PORT IDENTIFER */
+	u16			lun_rtpi;
 	atomic_t		lun_acl_count;
-	spinlock_t		lun_acl_lock;
-	spinlock_t		lun_sep_lock;
-	struct completion	lun_shutdown_comp;
-	struct list_head	lun_acl_list;
-	struct se_device	*lun_se_dev;
-	struct se_port		*lun_sep;
+	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 *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_ref_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 {
@@ -744,7 +738,6 @@ struct se_device {
 #define DF_EMULATED_VPD_UNIT_SERIAL		0x00000004
 #define DF_USING_UDEV_PATH			0x00000008
 #define DF_USING_ALIAS				0x00000010
-	u32			dev_port_count;
 	/* Physical device queue depth */
 	u32			queue_depth;
 	/* Used for SPC-2 reservations enforce of ISIDs */
@@ -761,7 +754,7 @@ struct se_device {
 	atomic_t		dev_ordered_id;
 	atomic_t		dev_ordered_sync;
 	atomic_t		dev_qf_count;
-	int			export_count;
+	u32			export_count;
 	spinlock_t		delayed_cmd_lock;
 	spinlock_t		execute_task_lock;
 	spinlock_t		dev_reservation_lock;
@@ -803,12 +796,15 @@ struct se_device {
 #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 */
-	struct se_subsystem_api *transport;
+	const struct target_backend_ops *transport;
 	/* Linked list for struct se_hba struct se_device list */
 	struct list_head	dev_list;
 	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;
 };
 
 struct se_hba {
@@ -825,33 +821,7 @@ struct se_hba {
 	spinlock_t		device_lock;
 	struct config_group	hba_group;
 	struct mutex		hba_access_mutex;
-	struct se_subsystem_api *transport;
-};
-
-struct scsi_port_stats {
-       u64     cmd_pdus;
-       u64     tx_data_octets;
-       u64     rx_data_octets;
-};
-
-struct se_port {
-	/* RELATIVE TARGET PORT IDENTIFER */
-	u16		sep_rtpi;
-	int		sep_tg_pt_secondary_stat;
-	int		sep_tg_pt_secondary_write_md;
-	u32		sep_index;
-	struct scsi_port_stats sep_stats;
-	/* Used for ALUA Target Port Groups membership */
-	atomic_t	sep_tg_pt_secondary_offline;
-	/* Used for PR ALL_TG_PT=1 */
-	atomic_t	sep_tg_pt_ref_cnt;
-	spinlock_t	sep_alua_lock;
-	struct mutex	sep_tg_pt_md_mutex;
-	struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
-	struct se_lun *sep_lun;
-	struct se_portal_group *sep_tpg;
-	struct list_head sep_alua_list;
-	struct list_head sep_list;
+	struct target_backend	*backend;
 };
 
 struct se_tpg_np {
@@ -860,24 +830,26 @@ struct se_tpg_np {
 };
 
 struct se_portal_group {
-	/* Type of target portal group, see transport_tpg_type_table */
-	enum transport_tpg_type_table se_tpg_type;
+	/*
+	 * PROTOCOL IDENTIFIER value per SPC4, 7.5.1.
+	 *
+	 * Negative values can be used by fabric drivers for internal use TPGs.
+	 */
+	int			proto_id;
 	/* Number of ACLed Initiator Nodes for this TPG */
 	u32			num_node_acls;
 	/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
 	atomic_t		tpg_pr_ref_count;
 	/* Spinlock for adding/removing ACLed Nodes */
-	spinlock_t		acl_node_lock;
+	struct mutex		acl_node_mutex;
 	/* Spinlock for adding/removing sessions */
 	spinlock_t		session_lock;
-	spinlock_t		tpg_lun_lock;
-	/* Pointer to $FABRIC_MOD portal group */
-	void			*se_tpg_fabric_ptr;
+	struct mutex		tpg_lun_mutex;
 	struct list_head	se_tpg_node;
 	/* linked list for initiator ACL list */
 	struct list_head	acl_node_list;
-	struct se_lun		**tpg_lun_list;
-	struct se_lun		tpg_virt_lun0;
+	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 */
diff --git a/include/target/target_core_configfs.h b/include/target/target_core_configfs.h
deleted file mode 100644
index b99c01170392..000000000000
--- a/include/target/target_core_configfs.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#define TARGET_CORE_CONFIGFS_VERSION TARGET_CORE_MOD_VERSION
-
-#define TARGET_CORE_CONFIG_ROOT	"/sys/kernel/config"
-
-#define TARGET_CORE_NAME_MAX_LEN	64
-#define TARGET_FABRIC_NAME_SIZE		32
-
-struct target_fabric_configfs_template {
-	struct config_item_type tfc_discovery_cit;
-	struct config_item_type	tfc_wwn_cit;
-	struct config_item_type tfc_wwn_fabric_stats_cit;
-	struct config_item_type tfc_tpg_cit;
-	struct config_item_type tfc_tpg_base_cit;
-	struct config_item_type tfc_tpg_lun_cit;
-	struct config_item_type tfc_tpg_port_cit;
-	struct config_item_type tfc_tpg_port_stat_cit;
-	struct config_item_type tfc_tpg_np_cit;
-	struct config_item_type tfc_tpg_np_base_cit;
-	struct config_item_type tfc_tpg_attrib_cit;
-	struct config_item_type tfc_tpg_auth_cit;
-	struct config_item_type tfc_tpg_param_cit;
-	struct config_item_type tfc_tpg_nacl_cit;
-	struct config_item_type tfc_tpg_nacl_base_cit;
-	struct config_item_type tfc_tpg_nacl_attrib_cit;
-	struct config_item_type tfc_tpg_nacl_auth_cit;
-	struct config_item_type tfc_tpg_nacl_param_cit;
-	struct config_item_type tfc_tpg_nacl_stat_cit;
-	struct config_item_type tfc_tpg_mappedlun_cit;
-	struct config_item_type tfc_tpg_mappedlun_stat_cit;
-};
-
-struct target_fabric_configfs {
-	char			tf_name[TARGET_FABRIC_NAME_SIZE];
-	atomic_t		tf_access_cnt;
-	struct list_head	tf_list;
-	struct config_group	tf_group;
-	struct config_group	tf_disc_group;
-	struct config_group	*tf_default_groups[2];
-	/* Pointer to fabric's config_item */
-	struct config_item	*tf_fabric;
-	/* Passed from fabric modules */
-	struct config_item_type	*tf_fabric_cit;
-	/* Pointer to fabric's struct module */
-	struct module *tf_module;
-	struct target_core_fabric_ops tf_ops;
-	struct target_fabric_configfs_template tf_cit_tmpl;
-};
-
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 0f4dc3768587..18afef91b447 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -4,20 +4,11 @@
 struct target_core_fabric_ops {
 	struct module *module;
 	const char *name;
+	size_t node_acl_size;
 	char *(*get_fabric_name)(void);
-	u8 (*get_fabric_proto_ident)(struct se_portal_group *);
 	char *(*tpg_get_wwn)(struct se_portal_group *);
 	u16 (*tpg_get_tag)(struct se_portal_group *);
 	u32 (*tpg_get_default_depth)(struct se_portal_group *);
-	u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
-				struct se_node_acl *,
-				struct t10_pr_registration *, int *,
-				unsigned char *);
-	u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
-				struct se_node_acl *,
-				struct t10_pr_registration *, int *);
-	char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
-				const char *, u32 *, char **);
 	int (*tpg_check_demo_mode)(struct se_portal_group *);
 	int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
 	int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
@@ -36,10 +27,6 @@ struct target_core_fabric_ops {
 	 * WRITE_STRIP and READ_INSERT operations.
 	 */
 	int (*tpg_check_prot_fabric_only)(struct se_portal_group *);
-	struct se_node_acl *(*tpg_alloc_fabric_acl)(
-					struct se_portal_group *);
-	void (*tpg_release_fabric_acl)(struct se_portal_group *,
-					struct se_node_acl *);
 	u32 (*tpg_get_inst_index)(struct se_portal_group *);
 	/*
 	 * Optional to release struct se_cmd and fabric dependent allocated
@@ -50,7 +37,6 @@ struct target_core_fabric_ops {
 	 */
 	int (*check_stop_free)(struct se_cmd *);
 	void (*release_cmd)(struct se_cmd *);
-	void (*put_session)(struct se_session *);
 	/*
 	 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
 	 */
@@ -66,7 +52,6 @@ struct target_core_fabric_ops {
 	int (*write_pending)(struct se_cmd *);
 	int (*write_pending_status)(struct se_cmd *);
 	void (*set_default_node_attributes)(struct se_node_acl *);
-	u32 (*get_task_tag)(struct se_cmd *);
 	int (*get_cmd_state)(struct se_cmd *);
 	int (*queue_data_in)(struct se_cmd *);
 	int (*queue_status)(struct se_cmd *);
@@ -88,9 +73,8 @@ struct target_core_fabric_ops {
 	struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
 				struct config_group *, const char *);
 	void (*fabric_drop_np)(struct se_tpg_np *);
-	struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
-				struct config_group *, const char *);
-	void (*fabric_drop_nodeacl)(struct se_node_acl *);
+	int (*fabric_init_nodeacl)(struct se_node_acl *, const char *);
+	void (*fabric_cleanup_nodeacl)(struct se_node_acl *);
 
 	struct configfs_attribute **tfc_discovery_attrs;
 	struct configfs_attribute **tfc_wwn_attrs;
@@ -132,16 +116,16 @@ void	transport_deregister_session(struct se_session *);
 void	transport_init_se_cmd(struct se_cmd *,
 		const struct target_core_fabric_ops *,
 		struct se_session *, u32, int, int, unsigned char *);
-sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
+sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u64);
 sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
 int	target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
-		unsigned char *, unsigned char *, u32, u32, int, int, int,
+		unsigned char *, unsigned char *, u64, u32, int, int, int,
 		struct scatterlist *, u32, struct scatterlist *, u32,
 		struct scatterlist *, u32);
 int	target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
-		unsigned char *, u32, u32, int, int, int);
+		unsigned char *, u64, u32, int, int, int);
 int	target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
-		unsigned char *sense, u32 unpacked_lun,
+		unsigned char *sense, u64 unpacked_lun,
 		void *fabric_tmr_ptr, unsigned char tm_type,
 		gfp_t, unsigned int, int);
 int	transport_handle_cdb_direct(struct se_cmd *);
@@ -155,8 +139,8 @@ bool	transport_wait_for_tasks(struct se_cmd *);
 int	transport_check_aborted_status(struct se_cmd *, int);
 int	transport_send_check_condition_and_sense(struct se_cmd *,
 		sense_reason_t, int);
-int	target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
-int	target_put_sess_cmd(struct se_session *, struct se_cmd *);
+int	target_get_sess_cmd(struct se_cmd *, bool);
+int	target_put_sess_cmd(struct se_cmd *);
 void	target_sess_cmd_list_set_waiting(struct se_session *);
 void	target_wait_for_sess_cmds(struct se_session *);
 
@@ -167,52 +151,19 @@ void	core_tmr_release_req(struct se_tmr_req *);
 int	transport_generic_handle_tmr(struct se_cmd *);
 void	transport_generic_request_failure(struct se_cmd *, sense_reason_t);
 void	__target_execute_cmd(struct se_cmd *);
-int	transport_lookup_tmr_lun(struct se_cmd *, u32);
+int	transport_lookup_tmr_lun(struct se_cmd *, u64);
 
 struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
 		unsigned char *);
 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
 		unsigned char *);
-void	core_tpg_clear_object_luns(struct se_portal_group *);
-struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
-		struct se_node_acl *, const char *, u32);
-int	core_tpg_del_initiator_node_acl(struct se_portal_group *,
-		struct se_node_acl *, int);
 int	core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
 		unsigned char *, u32, int);
 int	core_tpg_set_initiator_node_tag(struct se_portal_group *,
 		struct se_node_acl *, const char *);
-int	core_tpg_register(const struct target_core_fabric_ops *,
-		struct se_wwn *, struct se_portal_group *, void *, int);
+int	core_tpg_register(struct se_wwn *, struct se_portal_group *, int);
 int	core_tpg_deregister(struct se_portal_group *);
 
-/* SAS helpers */
-u8	sas_get_fabric_proto_ident(struct se_portal_group *);
-u32	sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *, unsigned char *);
-u32	sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *);
-char	*sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
-		u32 *, char **);
-
-/* FC helpers */
-u8	fc_get_fabric_proto_ident(struct se_portal_group *);
-u32	fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *, unsigned char *);
-u32	fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *);
-char	*fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
-		u32 *, char **);
-
-/* iSCSI helpers */
-u8	iscsi_get_fabric_proto_ident(struct se_portal_group *);
-u32	iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *, unsigned char *);
-u32	iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
-		struct t10_pr_registration *, int *);
-char	*iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
-		u32 *, char **);
-
 /*
  * The LIO target core uses DMA_TO_DEVICE to mean that data is going
  * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean