diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 16:29:49 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 16:29:49 -0800 |
commit | 38567333a6dabd0f2b4150e9fb6dd8e3ba2985e5 (patch) | |
tree | 1101e3df845ce804035335f80ef3467397bd5373 /include | |
parent | de23be5f3580f7b9b52cad6633bb3a3cd13abafe (diff) | |
parent | c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6:
[SCSI] target: Add LIO target core v4.0.0-rc6
[SCSI] sd,sr: kill compat SDEV_MEDIA_CHANGE event
[SCSI] sd: implement sd_check_events()
Diffstat (limited to 'include')
-rw-r--r-- | include/target/configfs_macros.h | 147 | ||||
-rw-r--r-- | include/target/target_core_base.h | 937 | ||||
-rw-r--r-- | include/target/target_core_configfs.h | 52 | ||||
-rw-r--r-- | include/target/target_core_device.h | 61 | ||||
-rw-r--r-- | include/target/target_core_fabric_configfs.h | 106 | ||||
-rw-r--r-- | include/target/target_core_fabric_lib.h | 28 | ||||
-rw-r--r-- | include/target/target_core_fabric_ops.h | 100 | ||||
-rw-r--r-- | include/target/target_core_tmr.h | 43 | ||||
-rw-r--r-- | include/target/target_core_tpg.h | 35 | ||||
-rw-r--r-- | include/target/target_core_transport.h | 351 |
10 files changed, 1860 insertions, 0 deletions
diff --git a/include/target/configfs_macros.h b/include/target/configfs_macros.h new file mode 100644 index 00000000000..7fe74608b43 --- /dev/null +++ b/include/target/configfs_macros.h @@ -0,0 +1,147 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * configfs_macros.h - extends macros for configfs + * + * 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 021110-1307, USA. + * + * Based on sysfs: + * sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel + * + * Based on kobject.h: + * Copyright (c) 2002-2003 Patrick Mochel + * Copyright (c) 2002-2003 Open Source Development Labs + * + * configfs Copyright (C) 2005 Oracle. All rights reserved. + * + * Added CONFIGFS_EATTR() macros from original configfs.h macros + * Copright (C) 2008-2009 Nicholas A. Bellinger <nab@linux-iscsi.org> + * + * Please read Documentation/filesystems/configfs.txt before using the + * configfs interface, ESPECIALLY the parts about reference counts and + * item destructors. + */ + +#ifndef _CONFIGFS_MACROS_H_ +#define _CONFIGFS_MACROS_H_ + +#include <linux/configfs.h> + +/* + * Users often need to create attribute structures for their configurable + * attributes, containing a configfs_attribute member and function pointers + * for the show() and store() operations on that attribute. If they don't + * need anything else on the extended attribute structure, they can use + * this macro to define it. The argument _name isends up as + * 'struct _name_attribute, as well as names of to CONFIGFS_ATTR_OPS() below. + * The argument _item is the name of the structure containing the + * struct config_item or struct config_group structure members + */ +#define CONFIGFS_EATTR_STRUCT(_name, _item) \ +struct _name##_attribute { \ + struct configfs_attribute attr; \ + ssize_t (*show)(struct _item *, char *); \ + ssize_t (*store)(struct _item *, const char *, size_t); \ +} + +/* + * With the extended attribute structure, users can use this macro + * (similar to sysfs' __ATTR) to make defining attributes easier. + * An example: + * #define MYITEM_EATTR(_name, _mode, _show, _store) \ + * struct myitem_attribute childless_attr_##_name = \ + * __CONFIGFS_EATTR(_name, _mode, _show, _store) + */ +#define __CONFIGFS_EATTR(_name, _mode, _show, _store) \ +{ \ + .attr = { \ + .ca_name = __stringify(_name), \ + .ca_mode = _mode, \ + .ca_owner = THIS_MODULE, \ + }, \ + .show = _show, \ + .store = _store, \ +} +/* Here is a readonly version, only requiring a show() operation */ +#define __CONFIGFS_EATTR_RO(_name, _show) \ +{ \ + .attr = { \ + .ca_name = __stringify(_name), \ + .ca_mode = 0444, \ + .ca_owner = THIS_MODULE, \ + }, \ + .show = _show, \ +} + +/* + * With these extended attributes, the simple show_attribute() and + * store_attribute() operations need to call the show() and store() of the + * attributes. This is a common pattern, so we provide a macro to define + * them. The argument _name is the name of the attribute defined by + * CONFIGFS_ATTR_STRUCT(). The argument _item is the name of the structure + * containing the struct config_item or struct config_group structure member. + * The argument _item_member is the actual name of the struct config_* struct + * in your _item structure. Meaning my_structure->some_config_group. + * ^^_item^^^^^ ^^_item_member^^^ + * This macro expects the attributes to be named "struct <name>_attribute". + */ +#define CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member) \ +static struct _item *to_##_name(struct config_item *ci) \ +{ \ + return (ci) ? container_of(to_config_group(ci), struct _item, \ + _item_member) : NULL; \ +} + +#define CONFIGFS_EATTR_OPS_SHOW(_name, _item) \ +static ssize_t _name##_attr_show(struct config_item *item, \ + struct configfs_attribute *attr, \ + char *page) \ +{ \ + struct _item *_item = to_##_name(item); \ + struct _name##_attribute * _name##_attr = \ + container_of(attr, struct _name##_attribute, attr); \ + ssize_t ret = 0; \ + \ + if (_name##_attr->show) \ + ret = _name##_attr->show(_item, page); \ + return ret; \ +} + +#define CONFIGFS_EATTR_OPS_STORE(_name, _item) \ +static ssize_t _name##_attr_store(struct config_item *item, \ + struct configfs_attribute *attr, \ + const char *page, size_t count) \ +{ \ + struct _item *_item = to_##_name(item); \ + struct _name##_attribute * _name##_attr = \ + container_of(attr, struct _name##_attribute, attr); \ + ssize_t ret = -EINVAL; \ + \ + if (_name##_attr->store) \ + ret = _name##_attr->store(_item, page, count); \ + return ret; \ +} + +#define CONFIGFS_EATTR_OPS(_name, _item, _item_member) \ + CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \ + CONFIGFS_EATTR_OPS_SHOW(_name, _item); \ + CONFIGFS_EATTR_OPS_STORE(_name, _item); + +#define CONFIGFS_EATTR_OPS_RO(_name, _item, _item_member) \ + CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \ + CONFIGFS_EATTR_OPS_SHOW(_name, _item); + +#endif /* _CONFIGFS_MACROS_H_ */ diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h new file mode 100644 index 00000000000..07fdfb6b9a9 --- /dev/null +++ b/include/target/target_core_base.h @@ -0,0 +1,937 @@ +#ifndef TARGET_CORE_BASE_H +#define TARGET_CORE_BASE_H + +#include <linux/in.h> +#include <linux/configfs.h> +#include <linux/dma-mapping.h> +#include <linux/blkdev.h> +#include <scsi/scsi_cmnd.h> +#include <net/sock.h> +#include <net/tcp.h> +#include "target_core_mib.h" + +#define TARGET_CORE_MOD_VERSION "v4.0.0-rc6" +#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT)) + +/* Used by transport_generic_allocate_iovecs() */ +#define TRANSPORT_IOV_DATA_BUFFER 5 +/* Maximum Number of LUNs per Target Portal Group */ +#define TRANSPORT_MAX_LUNS_PER_TPG 256 +/* + * By default we use 32-byte CDBs in TCM Core and subsystem plugin code. + * + * Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and + * include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use + * 16-byte CDBs by default and require an extra allocation for + * 32-byte CDBs to becasue of legacy issues. + * + * Within TCM Core there are no such legacy limitiations, so we go ahead + * use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size() + * within all TCM Core and subsystem plugin code. + */ +#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 SCSI_SENSE_BUFFERSIZE +/* Used by transport_send_check_condition_and_sense() */ +#define SPC_SENSE_KEY_OFFSET 2 +#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 128 +/* 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 + +/* struct se_hba->hba_flags */ +enum hba_flags_table { + HBA_FLAGS_INTERNAL_USE = 0x01, + 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, +}; + +/* Used for generate timer flags */ +enum timer_flags_table { + TF_RUNNING = 0x01, + TF_STOP = 0x02, +}; + +/* Special transport agnostic struct se_cmd->t_states */ +enum transport_state_table { + TRANSPORT_NO_STATE = 0, + TRANSPORT_NEW_CMD = 1, + TRANSPORT_DEFERRED_CMD = 2, + TRANSPORT_WRITE_PENDING = 3, + TRANSPORT_PROCESS_WRITE = 4, + TRANSPORT_PROCESSING = 5, + TRANSPORT_COMPLETE_OK = 6, + TRANSPORT_COMPLETE_FAILURE = 7, + TRANSPORT_COMPLETE_TIMEOUT = 8, + TRANSPORT_PROCESS_TMR = 9, + TRANSPORT_TMR_COMPLETE = 10, + TRANSPORT_ISTATE_PROCESSING = 11, + TRANSPORT_ISTATE_PROCESSED = 12, + TRANSPORT_KILL = 13, + TRANSPORT_REMOVE = 14, + TRANSPORT_FREE = 15, + TRANSPORT_NEW_CMD_MAP = 16, +}; + +/* Used for struct se_cmd->se_cmd_flags */ +enum se_cmd_flags_table { + SCF_SUPPORTED_SAM_OPCODE = 0x00000001, + SCF_TRANSPORT_TASK_SENSE = 0x00000002, + SCF_EMULATED_TASK_SENSE = 0x00000004, + SCF_SCSI_DATA_SG_IO_CDB = 0x00000008, + SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010, + SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020, + SCF_SCSI_NON_DATA_CDB = 0x00000040, + SCF_SCSI_CDB_EXCEPTION = 0x00000080, + SCF_SCSI_RESERVATION_CONFLICT = 0x00000100, + SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200, + SCF_SE_CMD_FAILED = 0x00000400, + SCF_SE_LUN_CMD = 0x00000800, + SCF_SE_ALLOW_EOO = 0x00001000, + SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000, + SCF_SENT_CHECK_CONDITION = 0x00004000, + SCF_OVERFLOW_BIT = 0x00008000, + SCF_UNDERFLOW_BIT = 0x00010000, + SCF_SENT_DELAYED_TAS = 0x00020000, + SCF_ALUA_NON_OPTIMIZED = 0x00040000, + SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000, + SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000, + SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000, + SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000, + SCF_EMULATE_SYNC_CACHE = 0x00800000, + SCF_EMULATE_CDB_ASYNC = 0x01000000, + SCF_EMULATE_SYNC_UNMAP = 0x02000000 +}; + +/* 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, +}; + +/* struct se_device->dev_status */ +enum transport_device_status_table { + TRANSPORT_DEVICE_ACTIVATED = 0x01, + TRANSPORT_DEVICE_DEACTIVATED = 0x02, + TRANSPORT_DEVICE_QUEUE_FULL = 0x04, + TRANSPORT_DEVICE_SHUTDOWN = 0x08, + TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10, + TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20, +}; + +/* + * Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason + * to signal which ASC/ASCQ sense payload should be built. + */ +enum tcm_sense_reason_table { + TCM_NON_EXISTENT_LUN = 0x01, + TCM_UNSUPPORTED_SCSI_OPCODE = 0x02, + TCM_INCORRECT_AMOUNT_OF_DATA = 0x03, + TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04, + TCM_SERVICE_CRC_ERROR = 0x05, + TCM_SNACK_REJECTED = 0x06, + TCM_SECTOR_COUNT_TOO_MANY = 0x07, + TCM_INVALID_CDB_FIELD = 0x08, + TCM_INVALID_PARAMETER_LIST = 0x09, + TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a, + TCM_UNKNOWN_MODE_PAGE = 0x0b, + TCM_WRITE_PROTECTED = 0x0c, + TCM_CHECK_CONDITION_ABORT_CMD = 0x0d, + TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e, + TCM_CHECK_CONDITION_NOT_READY = 0x0f, +}; + +struct se_obj { + atomic_t obj_access_count; +} ____cacheline_aligned; + +/* + * Used by TCM Core internally to signal if ALUA emulation is enabled or + * disabled, or running in with TCM/pSCSI passthrough mode + */ +typedef enum { + SPC_ALUA_PASSTHROUGH, + SPC2_ALUA_DISABLED, + SPC3_ALUA_EMULATED +} t10_alua_index_t; + +/* + * Used by TCM Core internally to signal if SAM Task Attribute emulation + * is enabled or disabled, or running in with TCM/pSCSI passthrough mode + */ +typedef enum { + SAM_TASK_ATTR_PASSTHROUGH, + SAM_TASK_ATTR_UNTAGGED, + SAM_TASK_ATTR_EMULATED +} t10_task_attr_index_t; + +struct se_cmd; + +struct t10_alua { + 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 *t10_sub_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; + int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *); + struct list_head tg_pt_gps_list; +} ____cacheline_aligned; + +struct t10_alua_lu_gp { + 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; + +struct t10_alua_lu_gp_member { + int lu_gp_assoc:1; + 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; +} ____cacheline_aligned; + +struct t10_alua_tg_pt_gp { + 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; + /* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */ +#define ALUA_MD_BUF_LEN 1024 + 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 *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; + +struct t10_alua_tg_pt_gp_member { + int tg_pt_gp_assoc:1; + 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; +} ____cacheline_aligned; + +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; +} ____cacheline_aligned; + +struct t10_wwn { + 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 *t10_sub_dev; + struct config_group t10_wwn_group; + struct list_head t10_vpd_list; +} ____cacheline_aligned; + + +/* + * Used by TCM Core internally to signal if >= SPC-3 peristent reservations + * emulation is enabled or disabled, or running in with TCM/pSCSI passthrough + * mode + */ +typedef enum { + SPC_PASSTHROUGH, + SPC2_RESERVATIONS, + SPC3_PERSISTENT_RESERVATIONS +} t10_reservations_index_t; + +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]; + /* For writing out live meta data */ + unsigned char *pr_aptpl_buf; + 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 */ + int isid_present_at_reg:1; + u32 pr_res_mapped_lun; + u32 pr_aptpl_target_lun; + 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; + 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; + struct list_head pr_reg_atp_list; + struct list_head pr_reg_atp_mem_list; +} ____cacheline_aligned; + +/* + * This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS, + * SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c: + * core_setup_reservations() + */ +struct t10_reservation_ops { + int (*t10_reservation_check)(struct se_cmd *, u32 *); + int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32); + int (*t10_pr_register)(struct se_cmd *); + int (*t10_pr_clear)(struct se_cmd *); +}; + +struct t10_reservation_template { + /* Reservation effects all target ports */ + int pr_all_tg_pt; + /* Activate Persistence across Target Power Loss enabled + * for SCSI device */ + int pr_aptpl_active; + /* Used by struct t10_reservation_template->pr_aptpl_buf_len */ +#define PR_APTPL_BUF_LEN 8192 + u32 pr_aptpl_buf_len; + u32 pr_generation; + t10_reservations_index_t res_type; + 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 t10_reservation_ops pr_ops; +} ____cacheline_aligned; + +struct se_queue_req { + int state; + void *cmd; + struct list_head qr_list; +} ____cacheline_aligned; + +struct se_queue_obj { + atomic_t queue_cnt; + spinlock_t cmd_queue_lock; + struct list_head qobj_list; + wait_queue_head_t thread_wq; +} ____cacheline_aligned; + +/* + * Used one per struct se_cmd to hold all extra struct se_task + * metadata. This structure is setup and allocated in + * drivers/target/target_core_transport.c:__transport_alloc_se_cmd() + */ +struct se_transport_task { + unsigned char *t_task_cdb; + unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE]; + unsigned long long t_task_lba; + int t_tasks_failed; + int t_tasks_fua; + int t_tasks_bidi:1; + u32 t_task_cdbs; + u32 t_tasks_check; + u32 t_tasks_no; + u32 t_tasks_sectors; + u32 t_tasks_se_num; + u32 t_tasks_se_bidi_num; + u32 t_tasks_sg_chained_no; + 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_dev_active; + atomic_t transport_lun_active; + atomic_t transport_lun_fe_stop; + atomic_t transport_lun_stop; + spinlock_t t_state_lock; + struct completion t_transport_stop_comp; + struct completion transport_lun_fe_stop_comp; + struct completion transport_lun_stop_comp; + struct scatterlist *t_tasks_sg_chained; + struct scatterlist t_tasks_sg_bounce; + void *t_task_buf; + /* + * Used for pre-registered fabric SGL passthrough WRITE and READ + * with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop + * and other HW target mode fabric modules. + */ + struct scatterlist *t_task_pt_sgl; + struct list_head *t_mem_list; + /* Used for BIDI READ */ + struct list_head *t_mem_bidi_list; + struct list_head t_task_list; +} ____cacheline_aligned; + +struct se_task { + unsigned char task_sense; + struct scatterlist *task_sg; + struct scatterlist *task_sg_bidi; + u8 task_scsi_status; + u8 task_flags; + int task_error_status; + int task_state_flags; + int task_padded_sg:1; + unsigned long long task_lba; + u32 task_no; + u32 task_sectors; + u32 task_size; + u32 task_sg_num; + u32 task_sg_offset; + enum dma_data_direction task_data_direction; + struct se_cmd *task_se_cmd; + struct se_device *se_dev; + struct completion task_stop_comp; + 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; + struct se_device *se_obj_ptr; + struct list_head t_list; + struct list_head t_execute_list; + struct list_head t_state_list; +} ____cacheline_aligned; + +#define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd) +#define TASK_DEV(task) ((struct se_device *)task->se_dev) + +struct se_cmd { + /* 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; + /* See include/linux/dma-mapping.h */ + enum dma_data_direction data_direction; + /* For SAM Task Attribute */ + int sam_task_attr; + /* Transport protocol dependent state, see transport_state_table */ + enum transport_state_table t_state; + /* Transport protocol dependent state for out of order CmdSNs */ + int deferred_t_state; + /* Transport specific error status */ + int transport_error_status; + /* See se_cmd_flags_table */ + 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; + /* Persistent Reservation key */ + u64 pr_res_key; + atomic_t transport_sent; + /* Used for sense data */ + void *sense_buffer; + struct list_head se_delayed_list; + struct list_head se_ordered_list; + struct list_head se_lun_list; + struct se_device *se_dev; + struct se_dev_entry *se_deve; + struct se_device *se_obj_ptr; + struct se_device *se_orig_obj_ptr; + struct se_lun *se_lun; + /* Only used for internal passthrough and legacy TCM fabric modules */ + struct se_session *se_sess; + struct se_tmr_req *se_tmr_req; + /* t_task is setup to t_task_backstore in transport_init_se_cmd() */ + struct se_transport_task *t_task; + struct se_transport_task t_task_backstore; + struct target_core_fabric_ops *se_tfo; + int (*transport_emulate_cdb)(struct se_cmd *); + void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *); + void (*transport_wait_for_tasks)(struct se_cmd *, int, int); + void (*transport_complete_callback)(struct se_cmd *); +} ____cacheline_aligned; + +#define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task)) +#define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo) + +struct se_tmr_req { + /* 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; + struct se_cmd *task_cmd; + struct se_cmd *ref_cmd; + struct se_device *tmr_dev; + struct se_lun *tmr_lun; + struct list_head tmr_list; +} ____cacheline_aligned; + +struct se_ua { + u8 ua_asc; + u8 ua_ascq; + struct se_node_acl *ua_nacl; + struct list_head ua_dev_list; + struct list_head ua_nacl_list; +} ____cacheline_aligned; + +struct se_node_acl { + char initiatorname[TRANSPORT_IQN_LEN]; + /* Used to signal demo mode created ACL, disabled by default */ + int dynamic_node_acl:1; + u32 queue_depth; + u32 acl_index; + u64 num_cmds; + u64 read_bytes; + u64 write_bytes; + spinlock_t stats_lock; + /* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */ + atomic_t acl_pr_ref_count; + /* Used for MIB access */ + atomic_t mib_ref_count; + struct se_dev_entry *device_list; + struct se_session *nacl_sess; + struct se_portal_group *se_tpg; + spinlock_t device_list_lock; + 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_default_groups[4]; + struct list_head acl_list; + struct list_head acl_sess_list; +} ____cacheline_aligned; + +struct se_session { + /* Used for MIB access */ + atomic_t mib_ref_count; + u64 sess_bin_isid; + 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; +} ____cacheline_aligned; + +#define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess) +#define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl) + +struct se_device; +struct se_transform_info; +struct scatterlist; + +struct se_lun_acl { + char initiatorname[TRANSPORT_IQN_LEN]; + u32 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; +} ____cacheline_aligned; + +struct se_dev_entry { + int def_pr_registered:1; + /* See transport_lunflags_table */ + u32 lun_flags; + u32 deve_cmds; + u32 mapped_lun; + u32 average_bytes; + u32 last_byte_count; + u32 total_cmds; + u32 total_bytes; + u64 pr_res_key; + u64 creation_time; + u32 attach_count; + u64 read_bytes; + u64 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; + spinlock_t ua_lock; + struct se_lun *se_lun; + struct list_head alua_port_list; + struct list_head ua_list; +} ____cacheline_aligned; + +struct se_dev_limits { + /* Max supported HW queue depth */ + u32 hw_queue_depth; + /* Max supported virtual queue depth */ + u32 queue_depth; + /* From include/linux/blkdev.h for the other HW/SW limits. */ + struct queue_limits limits; +} ____cacheline_aligned; + +struct se_dev_attrib { + int emulate_dpo; + int emulate_fua_write; + int emulate_fua_read; + int emulate_write_cache; + int emulate_ua_intlck_ctrl; + int emulate_tas; + int emulate_tpu; + int emulate_tpws; + int emulate_reservations; + int emulate_alua; + int enforce_pr_isids; + u32 hw_block_size; + u32 block_size; + u32 hw_max_sectors; + u32 max_sectors; + u32 optimal_sectors; + u32 hw_queue_depth; + u32 queue_depth; + u32 task_timeout; + u32 max_unmap_lba_count; + u32 max_unmap_block_desc_count; + u32 unmap_granularity; + u32 unmap_granularity_alignment; + struct se_subsystem_dev *da_sub_dev; + struct config_group da_group; +} ____cacheline_aligned; + +struct se_subsystem_dev { +/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */ +#define SE_DEV_ALIAS_LEN 512 + unsigned char se_dev_alias[SE_DEV_ALIAS_LEN]; +/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */ +#define SE_UDEV_PATH_LEN 512 + unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN]; + u32 su_dev_flags; + struct se_hba *se_dev_hba; + struct se_device *se_dev_ptr; + struct se_dev_attrib se_dev_attrib; + /* T10 Asymmetric Logical Unit Assignment for Target Ports */ + struct t10_alua t10_alua; + /* T10 Inquiry and VPD WWN Information */ + struct t10_wwn t10_wwn; + /* T10 SPC-2 + SPC-3 Reservations */ + struct t10_reservation_template 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; +} ____cacheline_aligned; + +#define T10_ALUA(su_dev) (&(su_dev)->t10_alua) +#define T10_RES(su_dev) (&(su_dev)->t10_reservation) +#define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops) + +struct se_device { + /* 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; + /* See transport_device_status_table */ + u32 dev_status; + u32 dev_tcq_window_closed; + /* Physical device queue depth */ + u32 queue_depth; + /* Used for SPC-2 reservations enforce of ISIDs */ + u64 dev_res_bin_isid; + t10_task_attr_index_t dev_task_attr_type; + /* Pointer to transport specific device structure */ + void *dev_ptr; + u32 dev_index; + u64 creation_time; + u32 num_resets; + u64 num_cmds; + u64 read_bytes; + u64 write_bytes; + spinlock_t stats_lock; + /* 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 dev_obj; + struct se_obj dev_access_obj; + struct se_obj dev_export_obj; + struct se_queue_obj *dev_queue_obj; + struct se_queue_obj *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 *dev_reserved_node_acl; + /* 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 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; + 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 *se_hba; + struct se_subsystem_dev *se_sub_dev; + /* Pointer to template of function pointers for transport */ + struct se_subsystem_api *transport; + /* Linked list for struct se_hba struct se_device list */ + struct list_head dev_list; + /* Linked list for struct se_global->g_se_dev_list */ + struct list_head g_se_dev_list; +} ____cacheline_aligned; + +#define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev) +#define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev) +#define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib) +#define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn) + +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; + 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 struct se_device */ + 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 mutex hba_access_mutex; + struct se_subsystem_api *transport; +} ____cacheline_aligned; + +#define SE_HBA(d) ((struct se_hba *)(d)->se_hba) + +struct se_lun { + /* See transport_lun_status_table */ + enum transport_lun_status_table 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 completion lun_shutdown_comp; |