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Message-Id: <1252720718.2067.232.camel@haakon2.linux-iscsi.org>
Date: Fri, 11 Sep 2009 18:58:38 -0700
From: "Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-scsi <linux-scsi@...r.kernel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Greg KH <greg@...ah.com>,
Douglas Gilbert <dgilbert@...erlog.com>,
James Bottomley <James.Bottomley@...senPartnership.com>,
Hannes Reinecke <hare@...e.de>,
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
Mike Christie <michaelc@...wisc.edu>,
Joel Becker <joel.becker@...cle.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Christoph Hellwig <hch@....de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Boaz Harrosh <bharrosh@...asas.com>,
Florian Haas <florian.haas@...bit.com>,
Philipp Reisner <philipp.reisner@...bit.com>
Subject: [RFC PATCH 18/19] Target_Core_Mod base and fabric_module includes
[RFC PATCH 18/19] Target_Core_Mod base and fabric_module includes
This patch adds the core data instructures for target_core_mod and fabric module API for accessing
for TCM/ConfigFS enabled fabric modules.
Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
new file mode 100644
index 0000000..113ea3f
--- /dev/null
+++ b/include/target/target_core_base.h
@@ -0,0 +1,974 @@
+/****************************************************************************
+ * Filename: target_core_base.h
+ *
+ * This file contains definitions related to the Target Core Engine.
+ *
+ * Nicholas A. Bellinger <nab@...nel.org>
+ *
+ * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
+ * Copyright (c) 2005, 2006, 2007 SBE, Inc.
+ * Copyright (c) 2007-2009 Rising Tide Software, Inc.
+ * Copyright (c) 2008-2009 Linux-iSCSI.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ ****************************************************************************/
+
+
+#ifndef TARGET_CORE_BASE_H
+#define TARGET_CORE_BASE_H
+
+#include <linux/in.h>
+#include <linux/configfs.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#ifdef SNMP_SUPPORT
+#include <target/target_core_mib.h>
+#endif /* SNMP_SUPPORT */
+
+#define TARGET_CORE_MOD_VERSION "v3.2.0"
+#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
+
+/* SCSI Command Descriptor Block Size a la SCSI's MAX_COMMAND_SIZE */
+#define SCSI_CDB_SIZE 16
+#define TRANSPORT_IOV_DATA_BUFFER 5
+
+/* Maximum Number of LUNs per Target Portal Group */
+#define TRANSPORT_MAX_LUNS_PER_TPG 256
+
+/* From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE */
+#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
+
+#define SPC_SENSE_KEY_OFFSET 2
+#define SPC_ASC_KEY_OFFSET 12
+#define SPC_ASCQ_KEY_OFFSET 13
+
+/* Currently same as ISCSI_IQN_LEN */
+#define TRANSPORT_IQN_LEN 224
+#define LU_GROUP_NAME_BUF 256
+#define TG_PT_GROUP_NAME_BUF 256
+/* Used to parse VPD into t10_vpd_t */
+#define VPD_TMP_BUF_SIZE 128
+/* Used for target_core-pscsi.c:pscsi_transport_complete() */
+#define VPD_BUF_LEN 256
+/* Used for se_subsystem_dev_t->se_dev_udev_path[], must be less than
+ PAGE_SIZE */
+#define SE_UDEV_PATH_LEN 512
+/* Used for se_dev_snap_attrib_t->contact */
+#define SNAP_CONTACT_LEN 128
+/* Used for se_dev_snap_attrib_t->lv_group */
+#define SNAP_GROUP_LEN 128
+/* Used for se_dev_snap_attrib->lvc_size */
+#define SNAP_LVC_LEN 32
+/* Used by t10_reservation_template_s->pr_[i,t]_port[] */
+#define PR_APTPL_MAX_IPORT_LEN 256
+#define PR_APTPL_MAX_TPORT_LEN 256
+/* Used by t10_reservation_template_s->pr_aptpl_buf_len */
+#define PR_APTPL_BUF_LEN 8192
+/* Used by t10_alua_tg_pt_gp_t->tg_pt_gp_md_buf_len */
+#define ALUA_MD_BUF_LEN 1024
+
+/* used by PSCSI and iBlock Transport drivers */
+#define READ_BLOCK_LEN 6
+#define READ_CAP_LEN 8
+#define READ_POSITION_LEN 20
+#define INQUIRY_LEN 36
+#define INQUIRY_VPD_SERIAL_LEN 254
+#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
+
+/* se_cmd_t->data_direction */
+#define SE_DIRECTION_NONE 0
+#define SE_DIRECTION_READ 1
+#define SE_DIRECTION_WRITE 2
+#define SE_DIRECTION_BIDI 3
+
+/* se_hba_t->hba_flags */
+#define HBA_FLAGS_INTERNAL_USE 0x00000001
+
+/* se_hba_t->hba_status and iscsi_tpg_hba->thba_status */
+#define HBA_STATUS_FREE 0x00000001
+#define HBA_STATUS_ACTIVE 0x00000002
+#define HBA_STATUS_INACTIVE 0x00000004
+#define HBA_STATUS_SHUTDOWN 0x00000008
+
+/* se_lun_t->lun_status */
+#define TRANSPORT_LUN_STATUS_FREE 0
+#define TRANSPORT_LUN_STATUS_ACTIVE 1
+
+/* se_lun_t->lun_type */
+#define TRANSPORT_LUN_TYPE_NONE 0
+#define TRANSPORT_LUN_TYPE_DEVICE 1
+
+/* se_portal_group_t->se_tpg_type */
+#define TRANSPORT_TPG_TYPE_NORMAL 0
+#define TRANSPORT_TPG_TYPE_DISCOVERY 1
+
+/* Used for se_node_acl->nodeacl_flags */
+#define NAF_DYNAMIC_NODE_ACL 0x01
+
+/* se_map_sg_t->map_flags */
+#define MAP_SG_KMAP 0x01
+
+/* Used for generate timer flags */
+#define TF_RUNNING 0x01
+#define TF_STOP 0x02
+
+/* Special transport agnostic se_cmd_t->t_states */
+#define TRANSPORT_NO_STATE 240
+#define TRANSPORT_NEW_CMD 241
+#define TRANSPORT_DEFERRED_CMD 242
+#define TRANSPORT_WRITE_PENDING 243
+#define TRANSPORT_PROCESS_WRITE 244
+#define TRANSPORT_PROCESSING 245
+#define TRANSPORT_COMPLETE_OK 246
+#define TRANSPORT_COMPLETE_FAILURE 247
+#define TRANSPORT_COMPLETE_TIMEOUT 248
+#define TRANSPORT_PROCESS_TMR 249
+#define TRANSPORT_TMR_COMPLETE 250
+#define TRANSPORT_ISTATE_PROCESSING 251
+#define TRANSPORT_ISTATE_PROCESSED 252
+#define TRANSPORT_KILL 253
+#define TRANSPORT_REMOVE 254
+#define TRANSPORT_FREE 255
+
+#define SCF_SUPPORTED_SAM_OPCODE 0x00000001
+#define SCF_TRANSPORT_TASK_SENSE 0x00000002
+#define SCF_EMULATED_TASK_SENSE 0x00000004
+#define SCF_SCSI_DATA_SG_IO_CDB 0x00000008
+#define SCF_SCSI_CONTROL_SG_IO_CDB 0x00000010
+#define SCF_SCSI_CONTROL_NONSG_IO_CDB 0x00000020
+#define SCF_SCSI_NON_DATA_CDB 0x00000040
+#define SCF_SCSI_CDB_EXCEPTION 0x00000080
+#define SCF_SCSI_RESERVATION_CONFLICT 0x00000100
+#define SCF_CMD_PASSTHROUGH 0x00000200
+#define SCF_CMD_PASSTHROUGH_NOALLOC 0x00000400
+#define SCF_SE_CMD_FAILED 0x00000800
+#define SCF_SE_LUN_CMD 0x00001000
+#define SCF_SE_ALLOW_EOO 0x00002000
+#define SCF_SE_DISABLE_ONLINE_CHECK 0x00004000
+#define SCF_SENT_CHECK_CONDITION 0x00008000
+#define SCF_OVERFLOW_BIT 0x00010000
+#define SCF_UNDERFLOW_BIT 0x00020000
+#define SCF_SENT_DELAYED_TAS 0x00040000
+#define SCF_ALUA_NON_OPTIMIZED 0x00080000
+#define SCF_DELAYED_CMD_FROM_SAM_ATTR 0x00100000
+
+/* se_device_t->type */
+#define PSCSI 1
+#define STGT 2
+#define PATA 3
+#define IBLOCK 4
+#define RAMDISK_DR 5
+#define RAMDISK_MCP 6
+#define FILEIO 7
+#define VROM 8
+#define VTAPE 9
+#define MEDIA_CHANGER 10
+
+/* se_dev_entry_t->lun_flags and se_lun_t->lun_access */
+#define TRANSPORT_LUNFLAGS_NO_ACCESS 0x00000000
+#define TRANSPORT_LUNFLAGS_INITIATOR_ACCESS 0x00000001
+#define TRANSPORT_LUNFLAGS_READ_ONLY 0x00000002
+#define TRANSPORT_LUNFLAGS_READ_WRITE 0x00000004
+
+/* se_device_t->dev_status */
+#define TRANSPORT_DEVICE_ACTIVATED 0x01
+#define TRANSPORT_DEVICE_DEACTIVATED 0x02
+#define TRANSPORT_DEVICE_QUEUE_FULL 0x04
+#define TRANSPORT_DEVICE_SHUTDOWN 0x08
+#define TRANSPORT_DEVICE_OFFLINE_ACTIVATED 0x10
+#define TRANSPORT_DEVICE_OFFLINE_DEACTIVATED 0x20
+
+#define DEV_STATUS_THR_TUR 1
+#define DEV_STATUS_THR_TAKE_ONLINE 2
+#define DEV_STATUS_THR_TAKE_OFFLINE 3
+#define DEV_STATUS_THR_SHUTDOWN 4
+
+/* se_dev_entry_t->deve_flags */
+#define DEF_PR_REGISTERED 0x01
+
+/* transport_send_check_condition_and_sense() */
+#define NON_EXISTENT_LUN 0x1
+#define UNSUPPORTED_SCSI_OPCODE 0x2
+#define INCORRECT_AMOUNT_OF_DATA 0x3
+#define UNEXPECTED_UNSOLICITED_DATA 0x4
+#define SERVICE_CRC_ERROR 0x5
+#define SNACK_REJECTED 0x6
+#define SECTOR_COUNT_TOO_MANY 0x7
+#define INVALID_CDB_FIELD 0x8
+#define INVALID_PARAMETER_LIST 0x9
+#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0xa
+#define UNKNOWN_MODE_PAGE 0xb
+#define WRITE_PROTECTED 0xc
+#define CHECK_CONDITION_ABORT_CMD 0xd
+#define CHECK_CONDITION_UNIT_ATTENTION 0xe
+#define CHECK_CONDITION_NOT_READY 0xf
+
+typedef struct se_obj_s {
+ atomic_t obj_access_count;
+} ____cacheline_aligned se_obj_t;
+
+typedef enum {
+ SPC_ALUA_PASSTHROUGH,
+ SPC2_ALUA_DISABLED,
+ SPC3_ALUA_EMULATED
+} t10_alua_index_t;
+
+typedef enum {
+ SAM_TASK_ATTR_PASSTHROUGH,
+ SAM_TASK_ATTR_UNTAGGED,
+ SAM_TASK_ATTR_EMULATED
+} t10_task_attr_index_t;
+
+struct se_cmd_s;
+
+typedef struct t10_alua_s {
+ t10_alua_index_t alua_type;
+ /* ALUA Target Port Group ID */
+ u16 alua_tg_pt_gps_counter;
+ u32 alua_tg_pt_gps_count;
+ spinlock_t tg_pt_gps_lock;
+ struct se_subsystem_dev_s *t10_sub_dev;
+ /* Used for default ALUA Target Port Group */
+ struct t10_alua_tg_pt_gp_s *default_tg_pt_gp;
+ /* Used for default ALUA Target Port Group ConfigFS group */
+ struct config_group alua_tg_pt_gps_group;
+ int (*alua_state_check)(struct se_cmd_s *, unsigned char *, u8 *);
+ struct list_head tg_pt_gps_list;
+} ____cacheline_aligned t10_alua_t;
+
+typedef struct t10_alua_lu_gp_s {
+ u16 lu_gp_id;
+ int lu_gp_valid_id;
+ u32 lu_gp_members;
+ atomic_t lu_gp_shutdown;
+ atomic_t lu_gp_ref_cnt;
+ spinlock_t lu_gp_lock;
+ struct config_group lu_gp_group;
+ struct list_head lu_gp_list;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned t10_alua_lu_gp_t;
+
+typedef struct t10_alua_lu_gp_member_s {
+ int lu_gp_assoc;
+ atomic_t lu_gp_mem_ref_cnt;
+ spinlock_t lu_gp_mem_lock;
+ t10_alua_lu_gp_t *lu_gp;
+ struct se_device_s *lu_gp_mem_dev;
+ struct list_head lu_gp_mem_list;
+} ____cacheline_aligned t10_alua_lu_gp_member_t;
+
+typedef struct t10_alua_tg_pt_gp_s {
+ u16 tg_pt_gp_id;
+ int tg_pt_gp_valid_id;
+ 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_pref;
+ int tg_pt_gp_write_metadata;
+ u32 tg_pt_gp_md_buf_len;
+ u32 tg_pt_gp_members;
+ atomic_t tg_pt_gp_alua_access_state;
+ atomic_t tg_pt_gp_ref_cnt;
+ spinlock_t tg_pt_gp_lock;
+ struct mutex tg_pt_gp_md_mutex;
+ struct se_subsystem_dev_s *tg_pt_gp_su_dev;
+ struct config_group tg_pt_gp_group;
+ struct list_head tg_pt_gp_list;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned t10_alua_tg_pt_gp_t;
+
+typedef struct t10_alua_tg_pt_gp_member_s {
+ int tg_pt_gp_assoc;
+ atomic_t tg_pt_gp_mem_ref_cnt;
+ spinlock_t tg_pt_gp_mem_lock;
+ t10_alua_tg_pt_gp_t *tg_pt_gp;
+ struct se_port_s *tg_pt;
+ struct list_head tg_pt_gp_mem_list;
+} ____cacheline_aligned t10_alua_tg_pt_gp_member_t;
+
+typedef struct t10_vpd_s {
+ 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;
+} ____cacheline_aligned t10_vpd_t;
+
+typedef struct t10_wwn_s {
+ unsigned char vendor[8];
+ unsigned char model[16];
+ unsigned char revision[4];
+ unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
+ spinlock_t t10_vpd_lock;
+ struct se_subsystem_dev_s *t10_sub_dev;
+ struct config_group t10_wwn_group;
+ struct list_head t10_vpd_list;
+} ____cacheline_aligned t10_wwn_t;
+
+typedef enum {
+ SPC_PASSTHROUGH,
+ SPC2_RESERVATIONS,
+ SPC3_PERSISTENT_RESERVATIONS
+} t10_reservations_index_t;
+
+typedef struct t10_pr_registration_s {
+ unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN]; /* Used during APTPL metadata reading */
+ unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN]; /* Used during APTPL metadata reading */
+ unsigned char *pr_aptpl_buf; /* For writing out live meta data */
+ u16 pr_aptpl_rpti;
+ u16 pr_reg_tpgt;
+ int pr_reg_all_tg_pt; /* Reservation effects all target ports */
+ int pr_reg_aptpl; /* Activate Persistence across Target Power Loss */
+ int pr_res_holder;
+ int pr_res_type;
+ int pr_res_scope;
+ u32 pr_res_mapped_lun;
+ u32 pr_aptpl_target_lun;
+ u32 pr_res_generation;
+ u64 pr_res_key;
+ atomic_t pr_res_holders;
+ struct se_node_acl_s *pr_reg_nacl;
+ struct se_dev_entry_s *pr_reg_deve;
+ struct se_lun_s *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;
+} ____cacheline_aligned t10_pr_registration_t;
+
+typedef struct t10_reservation_template_s {
+ /* Reservation effects all target ports */
+ int pr_all_tg_pt;
+ /* Activate Persistence across Target Power Loss enabled for SCSI device */
+ int pr_aptpl_active;
+ u32 pr_aptpl_buf_len;
+ u32 pr_generation;
+ t10_reservations_index_t res_type;
+ spinlock_t registration_lock;
+ spinlock_t aptpl_reg_lock;
+ /* Reservation holder when pr_all_tg_pt=1 */
+ struct se_node_acl_s *pr_res_holder;
+ struct list_head registration_list;
+ struct list_head aptpl_reg_list;
+ int (*t10_reservation_check)(struct se_cmd_s *, u32 *);
+ int (*t10_reserve)(struct se_cmd_s *);
+ int (*t10_release)(struct se_cmd_s *);
+ int (*t10_seq_non_holder)(struct se_cmd_s *, unsigned char *, u32);
+ int (*t10_pr_register)(struct se_cmd_s *);
+ int (*t10_pr_clear)(struct se_cmd_s *);
+} ____cacheline_aligned t10_reservation_template_t;
+
+typedef struct se_queue_req_s {
+ int state;
+ void *queue_se_obj_ptr;
+ void *cmd;
+ struct se_obj_lun_type_s *queue_se_obj_api;
+ struct list_head qr_list;
+} ____cacheline_aligned se_queue_req_t;
+
+typedef struct se_queue_obj_s {
+ atomic_t queue_cnt;
+ spinlock_t cmd_queue_lock;
+ struct list_head qobj_list;
+ wait_queue_head_t thread_wq;
+ struct semaphore thread_create_sem;
+ struct semaphore thread_done_sem;
+} ____cacheline_aligned se_queue_obj_t;
+
+typedef struct se_transport_task_s {
+ unsigned char t_task_cdb[SCSI_CDB_SIZE];
+ unsigned long long t_task_lba;
+ int t_tasks_failed;
+ u32 t_task_cdbs;
+ u32 t_task_check;
+ u32 t_task_no;
+ u32 t_task_sectors;
+ u32 t_task_se_num;
+ atomic_t t_fe_count;
+ atomic_t t_se_count;
+ atomic_t t_task_cdbs_left;
+ atomic_t t_task_cdbs_ex_left;
+ atomic_t t_task_cdbs_timeout_left;
+ atomic_t t_task_cdbs_sent;
+ atomic_t t_transport_aborted;
+ atomic_t t_transport_active;
+ atomic_t t_transport_complete;
+ atomic_t t_transport_queue_active;
+ atomic_t t_transport_sent;
+ atomic_t t_transport_stop;
+ atomic_t t_transport_timeout;
+ atomic_t transport_lun_active;
+ atomic_t transport_lun_fe_stop;
+ atomic_t transport_lun_stop;
+ spinlock_t t_state_lock;
+ struct semaphore t_transport_stop_sem;
+ struct semaphore t_transport_passthrough_sem;
+ struct semaphore t_transport_passthrough_wsem;
+ struct semaphore transport_lun_fe_stop_sem;
+ struct semaphore transport_lun_stop_sem;
+ void *t_task_buf;
+ void *t_task_pt_buf;
+ struct list_head t_task_list;
+ struct list_head *t_mem_list;
+} ____cacheline_aligned se_transport_task_t;
+
+typedef struct se_task_s {
+ unsigned char task_sense;
+ struct scatterlist *task_sg;
+ void *transport_req;
+ u8 task_scsi_status;
+ u8 task_flags;
+ int task_error_status;
+ int task_state_flags;
+ unsigned long long task_lba;
+ u32 task_no;
+ u32 task_sectors;
+ u32 task_size;
+ u32 task_sg_num;
+ u32 task_sg_offset;
+ struct se_cmd_s *task_se_cmd;
+ struct se_device_s *se_dev;
+ struct semaphore task_stop_sem;
+ atomic_t task_active;
+ atomic_t task_execute_queue;
+ atomic_t task_timeout;
+ atomic_t task_sent;
+ atomic_t task_stop;
+ atomic_t task_state_active;
+ struct timer_list task_timer;
+ int (*transport_map_task)(struct se_task_s *, u32);
+ void *se_obj_ptr;
+ struct se_obj_lun_type_s *se_obj_api;
+ struct list_head t_list;
+ struct list_head t_execute_list;
+ struct list_head t_state_list;
+} ____cacheline_aligned se_task_t;
+
+#define TASK_CMD(task) ((struct se_cmd_s *)task->task_se_cmd)
+#define TASK_DEV(task) ((struct se_device_s *)task->se_dev)
+
+typedef struct se_transform_info_s {
+ int ti_set_counts;
+ u32 ti_data_length;
+ unsigned long long ti_lba;
+ struct se_cmd_s *ti_se_cmd;
+ struct se_device_s *ti_dev;
+ void *se_obj_ptr;
+ void *ti_obj_ptr;
+ struct se_obj_lun_type_s *se_obj_api;
+ struct se_obj_lun_type_s *ti_obj_api;
+} ____cacheline_aligned se_transform_info_t;
+
+typedef struct se_offset_map_s {
+ int map_reset;
+ u32 iovec_length;
+ u32 iscsi_offset;
+ u32 current_offset;
+ u32 orig_offset;
+ u32 sg_count;
+ u32 sg_current;
+ u32 sg_length;
+ struct page *sg_page;
+ struct se_mem_s *map_se_mem;
+ struct se_mem_s *map_orig_se_mem;
+ void *iovec_base;
+} ____cacheline_aligned se_offset_map_t;
+
+typedef struct se_map_sg_s {
+ int map_flags;
+ u32 data_length;
+ u32 data_offset;
+ void *fabric_cmd;
+ struct se_cmd_s *se_cmd;
+ struct iovec *iov;
+} ____cacheline_aligned se_map_sg_t;
+
+typedef struct se_unmap_sg_s {
+ u32 data_length;
+ u32 sg_count;
+ u32 sg_offset;
+ u32 padding;
+ u32 t_offset;
+ void *fabric_cmd;
+ struct se_cmd_s *se_cmd;
+ se_offset_map_t lmap;
+ struct se_mem_s *cur_se_mem;
+} ____cacheline_aligned se_unmap_sg_t;
+
+typedef struct se_cmd_s {
+ /* SAM response code being sent to initiator */
+ u8 scsi_status;
+ u8 scsi_asc;
+ u8 scsi_ascq;
+ u8 scsi_sense_reason;
+ u16 scsi_sense_length;
+ /* Delay for ALUA Active/NonOptimized state access in milliseconds */
+ int alua_nonop_delay;
+ int data_direction;
+ /* For SAM Task Attribute */
+ int sam_task_attr;
+ /* Transport protocol dependent state */
+ int t_state;
+ /* Transport protocol dependent state for out of order CmdSNs */
+ int deferred_t_state;
+ /* Transport specific error status */
+ int transport_error_status;
+ u32 se_cmd_flags;
+ u32 se_ordered_id;
+ /* Total size in bytes associated with command */
+ u32 data_length;
+ /* SCSI Presented Data Transfer Length */
+ u32 cmd_spdtl;
+ u32 residual_count;
+ u32 orig_fe_lun;
+ /* Number of iovecs iovecs used for IP stack calls */
+ u32 iov_data_count;
+ /* Number of iovecs allocated for iscsi_cmd_t->iov_data */
+ u32 orig_iov_data_count;
+ /* Persistent Reservation key */
+ u64 pr_res_key;
+ atomic_t transport_sent;
+ /* Used for sense data */
+ void *sense_buffer;
+ /* Used with sockets based fabric plugins */
+ struct iovec *iov_data;
+ struct list_head se_delayed_list;
+ struct list_head se_ordered_list;
+ struct list_head se_lun_list;
+ struct se_device_s *se_dev;
+ struct se_dev_entry_s *se_deve;
+ struct se_lun_s *se_lun;
+ struct se_obj_lun_type_s *se_obj_api;
+ void *se_obj_ptr;
+ struct se_obj_lun_type_s *se_orig_obj_api;
+ void *se_orig_obj_ptr;
+ void *se_fabric_cmd_ptr;
+ struct se_session_s *se_sess;
+ struct se_tmr_req_s *se_tmr_req;
+ struct se_transport_task_s *t_task;
+ struct target_core_fabric_ops *se_tfo;
+ int (*transport_add_cmd_to_queue)(struct se_cmd_s *, u8);
+ int (*transport_allocate_iovecs)(struct se_cmd_s *);
+ int (*transport_allocate_resources)(struct se_cmd_s *, u32, u32);
+ int (*transport_cdb_transform)(struct se_cmd_s *,
+ struct se_transform_info_s *);
+ int (*transport_do_transform)(struct se_cmd_s *,
+ struct se_transform_info_s *);
+ int (*transport_emulate_cdb)(struct se_cmd_s *);
+ void (*transport_free_resources)(struct se_cmd_s *);
+ u32 (*transport_get_lba)(unsigned char *);
+ unsigned long long (*transport_get_long_lba)(unsigned char *);
+ struct se_task_s *(*transport_get_task)(struct se_transform_info_s *,
+ struct se_cmd_s *, void *,
+ struct se_obj_lun_type_s *);
+ int (*transport_map_buffers_to_tasks)(struct se_cmd_s *);
+ void (*transport_map_SG_segments)(struct se_unmap_sg_s *);
+ void (*transport_passthrough_done)(struct se_cmd_s *);
+ void (*transport_unmap_SG_segments)(struct se_unmap_sg_s *);
+ int (*transport_set_iovec_ptrs)(struct se_map_sg_s *,
+ struct se_unmap_sg_s *);
+ void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
+ void (*transport_wait_for_tasks)(struct se_cmd_s *, int, int);
+ void (*callback)(struct se_cmd_s *cmd, void *callback_arg,
+ int complete_status);
+ void *callback_arg;
+} ____cacheline_aligned se_cmd_t;
+
+#define T_TASK(cmd) ((se_transport_task_t *)(cmd->t_task))
+#define CMD_OBJ_API(cmd) ((struct se_obj_lun_type_s *)(cmd->se_obj_api))
+#define CMD_ORIG_OBJ_API(cmd) ((struct se_obj_lun_type_s *) \
+ (cmd->se_orig_obj_api))
+#define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
+
+typedef struct se_tmr_req_s {
+ /* Task Management function to be preformed */
+ u8 function;
+ /* Task Management response to send */
+ u8 response;
+ int call_transport;
+ /* Reference to ITT that Task Mgmt should be preformed */
+ u32 ref_task_tag;
+ /* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
+ u64 ref_task_lun;
+ void *fabric_tmr_ptr;
+ se_cmd_t *task_cmd;
+ se_cmd_t *ref_cmd;
+ struct se_device_s *tmr_dev;
+ struct se_lun_s *tmr_lun;
+ struct list_head tmr_list;
+} ____cacheline_aligned se_tmr_req_t;
+
+typedef struct se_ua_s {
+ u8 ua_asc;
+ u8 ua_ascq;
+ struct se_node_acl_s *ua_nacl;
+ struct list_head ua_dev_list;
+ struct list_head ua_nacl_list;
+} ____cacheline_aligned se_ua_t;
+
+typedef struct se_node_acl_s {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ int nodeacl_flags;
+ u32 queue_depth;
+#ifdef SNMP_SUPPORT
+ u32 acl_index;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+#endif /* SNMP_SUPPORT */
+ struct se_dev_entry_s *device_list;
+ struct se_session_s *nacl_sess;
+ struct se_portal_group_s *se_tpg;
+ void *fabric_acl_ptr;
+ spinlock_t device_list_lock;
+ spinlock_t nacl_sess_lock;
+ struct config_group acl_group;
+ struct config_group acl_param_group;
+ struct list_head acl_list;
+} ____cacheline_aligned se_node_acl_t;
+
+typedef struct se_session_s {
+ struct se_node_acl_s *se_node_acl;
+ struct se_portal_group_s *se_tpg;
+ void *fabric_sess_ptr;
+ struct list_head sess_list;
+} ____cacheline_aligned se_session_t;
+
+#define SE_SESS(cmd) ((struct se_session_s *)(cmd)->se_sess)
+#define SE_NODE_ACL(sess) ((struct se_node_acl_s *)(sess)->se_node_acl)
+
+struct se_device_s;
+struct se_transform_info_s;
+struct se_obj_lun_type_s;
+struct scatterlist;
+
+typedef struct se_lun_acl_s {
+ char initiatorname[TRANSPORT_IQN_LEN];
+ u32 mapped_lun;
+ struct se_node_acl_s *se_lun_nacl;
+ struct se_lun_s *se_lun;
+ struct list_head lacl_list;
+ struct config_group se_lun_group;
+} ____cacheline_aligned se_lun_acl_t;
+
+typedef struct se_dev_entry_s {
+ u32 lun_flags;
+ u32 deve_cmds;
+ u32 deve_flags;
+ u32 mapped_lun;
+ u32 average_bytes;
+ u32 last_byte_count;
+ u32 total_cmds;
+ u32 total_bytes;
+ u64 pr_res_key;
+#ifdef SNMP_SUPPORT
+ u64 creation_time;
+ u32 attach_count;
+ u64 read_bytes;
+ u64 write_bytes;
+#endif /* SNMP_SUPPORT */
+ atomic_t ua_count;
+ se_lun_acl_t *se_lun_acl;
+ spinlock_t ua_lock;
+ struct se_lun_s *se_lun;
+ struct list_head alua_port_list;
+ struct list_head ua_list;
+} ____cacheline_aligned se_dev_entry_t;
+
+typedef struct se_dev_attrib_s {
+ int emulate_ua_intlck_ctrl;
+ int emulate_tas;
+ int emulate_reservations;
+ int emulate_alua;
+ u32 hw_block_size;
+ u32 block_size;
+ u32 hw_max_sectors;
+ u32 max_sectors;
+ u32 hw_queue_depth;
+ u32 queue_depth;
+ u32 task_timeout;
+ struct se_subsystem_dev_s *da_sub_dev;
+ struct config_group da_group;
+} ____cacheline_aligned se_dev_attrib_t;
+
+typedef struct se_dev_snap_attrib_s {
+ unsigned char contact[SNAP_CONTACT_LEN];
+ unsigned char lv_group[SNAP_GROUP_LEN];
+ unsigned char lvc_size[SNAP_LVC_LEN]; /* in lvcreate --size shorthand */
+ pid_t pid;
+ int enabled;
+ int permissions;
+ int max_snapshots;
+ int max_warn;
+ int check_interval;
+ int create_interval;
+ int usage;
+ int usage_warn;
+ int vgs_usage_warn;
+} se_dev_snap_attrib_t;
+
+typedef struct se_subsystem_dev_s {
+ unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
+ u32 su_dev_flags;
+ struct se_hba_s *se_dev_hba;
+ struct se_device_s *se_dev_ptr;
+ se_dev_attrib_t se_dev_attrib;
+ se_dev_snap_attrib_t se_snap_attrib;
+ /* T10 Asymmetric Logical Unit Assignment for Target Ports */
+ t10_alua_t t10_alua;
+ /* T10 Inquiry and VPD WWN Information */
+ t10_wwn_t t10_wwn;
+ /* T10 SPC-2 + SPC-3 Reservations */
+ t10_reservation_template_t t10_reservation;
+ spinlock_t se_dev_lock;
+ void *se_dev_su_ptr;
+ struct list_head g_se_dev_list;
+ struct config_group se_dev_group;
+ /* For T10 Reservations */
+ struct config_group se_dev_pr_group;
+ /* For userspace lvm utils */
+ struct config_group se_dev_snap_group;
+} ____cacheline_aligned se_subsystem_dev_t;
+
+#define SE_DEV_SNAP(su_dev) (&(su_dev)->se_snap_attrib)
+#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
+#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
+
+typedef struct se_device_s {
+ /* Type of disk transport used for device */
+ u8 type;
+ /* Set to 1 if thread is NOT sleeping on thread_sem */
+ u8 thread_active;
+ u8 dev_status_timer_flags;
+ /* RELATIVE TARGET PORT IDENTIFER Counter */
+ u16 dev_rpti_counter;
+ /* Used for SAM Task Attribute ordering */
+ u32 dev_cur_ordered_id;
+ u32 dev_flags;
+ u32 dev_port_count;
+ u32 dev_status;
+ u32 dev_tcq_window_closed;
+ /* Physical device queue depth */
+ u32 queue_depth;
+ t10_task_attr_index_t dev_task_attr_type;
+ unsigned long long dev_sectors_total;
+ /* Pointer to transport specific device structure */
+ void *dev_ptr;
+#ifdef SNMP_SUPPORT
+ u32 dev_index;
+ u64 creation_time;
+ u32 num_resets;
+ u64 num_cmds;
+ u64 read_bytes;
+ u64 write_bytes;
+ spinlock_t stats_lock;
+#endif /* SNMP_SUPPORT */
+ /* Active commands on this virtual SE device */
+ atomic_t active_cmds;
+ atomic_t simple_cmds;
+ atomic_t depth_left;
+ atomic_t dev_ordered_id;
+ atomic_t dev_tur_active;
+ atomic_t execute_tasks;
+ atomic_t dev_status_thr_count;
+ atomic_t dev_hoq_count;
+ atomic_t dev_ordered_sync;
+ struct se_obj_s dev_obj;
+ struct se_obj_s dev_access_obj;
+ struct se_obj_s dev_export_obj;
+ struct se_obj_s dev_feature_obj;
+ se_queue_obj_t *dev_queue_obj;
+ se_queue_obj_t *dev_status_queue_obj;
+ spinlock_t delayed_cmd_lock;
+ spinlock_t ordered_cmd_lock;
+ spinlock_t execute_task_lock;
+ spinlock_t state_task_lock;
+ spinlock_t dev_alua_lock;
+ spinlock_t dev_reservation_lock;
+ spinlock_t dev_state_lock;
+ spinlock_t dev_status_lock;
+ spinlock_t dev_status_thr_lock;
+ spinlock_t se_port_lock;
+ spinlock_t se_tmr_lock;
+ /* Used for legacy SPC-2 reservationsa */
+ struct se_node_acl_s *dev_reserved_node_acl;
+ /* Used for ALUA Logical Unit Group membership */
+ struct t10_alua_lu_gp_member_s *dev_alua_lu_gp_mem;
+ /* Used for SPC-3 Persistent Reservations */
+ struct t10_pr_registration_s *dev_pr_res_holder;
+ struct list_head dev_sep_list;
+ struct list_head dev_tmr_list;
+ struct timer_list dev_status_timer;
+ /* Pointer to descriptor for processing thread */
+ struct task_struct *process_thread;
+ pid_t process_thread_pid;
+ struct task_struct *dev_mgmt_thread;
+ int (*write_pending)(struct se_task_s *);
+ void (*dev_generate_cdb)(unsigned long long, u32 *,
+ unsigned char *, int);
+ struct se_obj_lun_type_s *dev_obj_api;
+ struct list_head delayed_cmd_list;
+ struct list_head ordered_cmd_list;
+ struct list_head execute_task_list;
+ struct list_head state_task_list;
+ /* Pointer to associated SE HBA */
+ struct se_hba_s *se_hba;
+ struct se_subsystem_dev_s *se_sub_dev;
+ /* Pointer to template of function pointers for transport */
+ struct se_subsystem_api_s *transport;
+ /* Linked list for se_hba_t se_device_t list */
+ struct list_head dev_list;
+ /* Linked list for se_global_t->g_se_dev_list */
+ struct list_head g_se_dev_list;
+} ____cacheline_aligned se_device_t;
+
+#define SE_DEV(cmd) ((se_device_t *)(cmd)->se_lun->se_dev)
+#define SU_DEV(dev) ((se_subsystem_dev_t *)(dev)->se_sub_dev)
+#define ISCSI_DEV(cmd) SE_DEV(cmd)
+#define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
+#define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
+#define DEV_OBJ_API(dev) ((struct se_obj_lun_type_s *)(dev)->dev_obj_api)
+
+typedef struct se_hba_s {
+ /* Type of disk transport used for HBA. */
+ u8 type;
+ u16 hba_tpgt;
+ u32 hba_status;
+ u32 hba_id;
+ u32 hba_flags;
+ /* Virtual iSCSI devices attached. */
+ u32 dev_count;
+#ifdef SNMP_SUPPORT
+ u32 hba_index;
+#endif
+ atomic_t dev_mib_access_count;
+ atomic_t load_balance_queue;
+ atomic_t left_queue_depth;
+ /* Maximum queue depth the HBA can handle. */
+ atomic_t max_queue_depth;
+ /* Pointer to transport specific host structure. */
+ void *hba_ptr;
+ /* Linked list for se_device_t */
+ struct list_head hba_dev_list;
+ struct list_head hba_list;
+ spinlock_t device_lock;
+ spinlock_t hba_queue_lock;
+ struct config_group hba_group;
+ struct semaphore hba_access_sem;
+ struct se_subsystem_api_s *transport;
+} ____cacheline_aligned se_hba_t;
+
+#define ISCSI_HBA(d) ((se_hba_t *)(d)->se_hba)
+/* Using SE_HBA() for new code */
+#define SE_HBA(d) ((se_hba_t *)(d)->se_hba)
+
+typedef struct se_lun_s {
+ int lun_type;
+ int lun_status;
+ u32 lun_access;
+ u32 lun_flags;
+ u32 unpacked_lun;
+ atomic_t lun_acl_count;
+ spinlock_t lun_acl_lock;
+ spinlock_t lun_cmd_lock;
+ spinlock_t lun_sep_lock;
+ struct list_head lun_cmd_list;
+ struct list_head lun_acl_list;
+ se_device_t *se_dev;
+ void *lun_type_ptr;
+ struct config_group lun_group;
+ struct se_obj_lun_type_s *lun_obj_api;
+ struct se_port_s *lun_sep;
+} ____cacheline_aligned se_lun_t;
+
+#define SE_LUN(c) ((se_lun_t *)(c)->se_lun)
+#define ISCSI_LUN(c) SE_LUN(c)
+#define LUN_OBJ_API(lun) ((struct se_obj_lun_type_s *)(lun)->lun_obj_api)
+
+typedef struct se_port_s {
+ /* RELATIVE TARGET PORT IDENTIFER */
+ u16 sep_rtpi;
+ int sep_tg_pt_secondary_stat;
+ int sep_tg_pt_secondary_write_md;
+#ifdef SNMP_SUPPORT
+ u32 sep_index;
+ scsi_port_stats_t sep_stats;
+#endif
+ /* Used for ALUA Target Port Groups membership */
+ atomic_t sep_tg_pt_gp_active;
+ atomic_t sep_tg_pt_secondary_offline;
+ spinlock_t sep_alua_lock;
+ struct mutex sep_tg_pt_md_mutex;
+ struct t10_alua_tg_pt_gp_member_s *sep_alua_tg_pt_gp_mem;
+ struct se_lun_s *sep_lun;
+ struct se_portal_group_s *sep_tpg;
+ struct list_head sep_alua_list;
+ struct list_head sep_list;
+} ____cacheline_aligned se_port_t;
+
+typedef struct se_portal_group_s {
+ /* Type of target portal group */
+ int se_tpg_type;
+ /* Number of ACLed Initiator Nodes for this TPG */
+ u32 num_node_acls;
+ /* Spinlock for adding/removing ACLed Nodes */
+ spinlock_t acl_node_lock;
+ /* 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 list_head se_tpg_list;
+ /* linked list for initiator ACL list */
+ struct list_head acl_node_list;
+ struct se_lun_s *tpg_lun_list;
+ /* List of TCM sessions assoicated wth this TPG */
+ struct list_head tpg_sess_list;
+ /* Pointer to $FABRIC_MOD dependent code */
+ struct target_core_fabric_ops *se_tpg_tfo;
+ struct config_group tpg_group;
+} ____cacheline_aligned se_portal_group_t;
+
+#define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
+
+typedef struct se_global_s {
+ u16 alua_lu_gps_counter;
+ u32 in_shutdown;
+ u32 alua_lu_gps_count;
+ u32 g_hba_id_counter;
+ struct config_group target_core_hbagroup;
+ struct config_group alua_group;
+ struct config_group alua_lu_gps_group;
+ struct list_head g_lu_gps_list;
+ struct list_head g_se_tpg_list;
+ struct list_head g_hba_list;
+ struct list_head g_se_dev_list;
+ struct se_plugin_class_s *plugin_class_list;
+ t10_alua_lu_gp_t *default_lu_gp;
+ spinlock_t g_device_lock;
+ spinlock_t hba_lock;
+ spinlock_t se_tpg_lock;
+ spinlock_t lu_gps_lock;
+ spinlock_t plugin_class_lock;
+#ifdef DEBUG_DEV
+ spinlock_t debug_dev_lock;
+#endif
+} ____cacheline_aligned se_global_t;
+
+#endif /* TARGET_CORE_BASE_H */
diff --git a/include/target/target_core_fabric_ops.h b/include/target/target_core_fabric_ops.h
new file mode 100644
index 0000000..b23a860
--- /dev/null
+++ b/include/target/target_core_fabric_ops.h
@@ -0,0 +1,48 @@
+struct target_core_fabric_ops {
+ struct configfs_subsystem *tf_subsys;
+ char *(*get_fabric_name)(void);
+ u8 (*get_fabric_proto_ident)(void);
+ char *(*tpg_get_wwn)(struct se_portal_group_s *);
+ u16 (*tpg_get_tag)(struct se_portal_group_s *);
+ u32 (*tpg_get_default_depth)(struct se_portal_group_s *);
+ u32 (*tpg_get_pr_transport_id)(struct se_portal_group_s *,
+ struct se_node_acl_s *, int *, unsigned char *);
+ u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group_s *,
+ struct se_node_acl_s *, int *);
+ char *(*tpg_parse_pr_out_transport_id)(const char *, u32 *, char **);
+ int (*tpg_check_demo_mode)(struct se_portal_group_s *);
+ int (*tpg_check_demo_mode_cache)(struct se_portal_group_s *);
+ int (*tpg_check_demo_mode_write_protect)(struct se_portal_group_s *);
+ void *(*tpg_alloc_fabric_acl)(struct se_portal_group_s *,
+ struct se_node_acl_s *);
+ void (*tpg_release_fabric_acl)(struct se_portal_group_s *,
+ struct se_node_acl_s *);
+ u32 (*tpg_get_inst_index)(struct se_portal_group_s *);
+ void (*release_cmd_to_pool)(struct se_cmd_s *);
+ void (*release_cmd_direct)(struct se_cmd_s *);
+ int (*dev_del_lun)(struct se_portal_group_s *, u32);
+ /*
+ * Called with spin_lock_bh(se_portal_group_t->session_lock held.
+ */
+ int (*shutdown_session)(struct se_session_s *);
+ void (*close_session)(struct se_session_s *);
+ void (*stop_session)(struct se_session_s *, int, int);
+ void (*fall_back_to_erl0)(struct se_session_s *);
+ int (*sess_logged_in)(struct se_session_s *);
+ u32 (*sess_get_index)(struct se_session_s *);
+ u32 (*sess_get_initiator_wwn)(struct se_session_s *,
+ unsigned char *, u32);
+ int (*write_pending)(struct se_cmd_s *);
+ int (*write_pending_status)(struct se_cmd_s *);
+ void (*set_default_node_attributes)(struct se_node_acl_s *);
+ u32 (*get_task_tag)(struct se_cmd_s *);
+ int (*get_cmd_state)(struct se_cmd_s *);
+ void (*new_cmd_failure)(struct se_cmd_s *);
+ int (*queue_data_in)(struct se_cmd_s *);
+ int (*queue_status)(struct se_cmd_s *);
+ int (*queue_tm_rsp)(struct se_cmd_s *);
+ u16 (*set_fabric_sense_len)(struct se_cmd_s *, u32);
+ u16 (*get_fabric_sense_len)(void);
+ int (*is_state_remove)(struct se_cmd_s *);
+ u64 (*pack_lun)(unsigned int);
+};
--
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