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linux/drivers/target/target_core_internal.h
Mike Christie 741443436e scsi: target: Move cmd counter allocation 
[ Upstream commit 4edba7e4a8 ]

iSCSI needs to allocate its cmd counter per connection for MCS support
where we need to stop and wait on commands running on a connection instead
of per session. This moves the cmd counter allocation to
target_setup_session() which is used by drivers that need the stop+wait
behavior per session.

xcopy doesn't need stop+wait at all, so we will be OK moving the cmd
counter allocation outside of transport_init_session().

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230319015620.96006-3-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Stable-dep-of: 395cee83d0 ("scsi: target: iscsit: Stop/wait on cmds during conn close")
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-11 23:03:19 +09:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TARGET_CORE_INTERNAL_H
#define TARGET_CORE_INTERNAL_H
#include <linux/configfs.h>
#include <linux/list.h>
#include <linux/types.h>
#include <target/target_core_base.h>
#define TARGET_CORE_NAME_MAX_LEN 64
#define TARGET_FABRIC_NAME_SIZE 32
struct target_backend {
struct list_head list;
const struct target_backend_ops *ops;
struct config_item_type tb_dev_cit;
struct config_item_type tb_dev_attrib_cit;
struct config_item_type tb_dev_action_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 target_fabric_configfs {
atomic_t tf_access_cnt;
struct list_head tf_list;
struct config_group tf_group;
struct config_group tf_disc_group;
const struct target_core_fabric_ops *tf_ops;
struct config_item_type tf_discovery_cit;
struct config_item_type tf_wwn_cit;
struct config_item_type tf_wwn_fabric_stats_cit;
struct config_item_type tf_wwn_param_cit;
struct config_item_type tf_tpg_cit;
struct config_item_type tf_tpg_base_cit;
struct config_item_type tf_tpg_lun_cit;
struct config_item_type tf_tpg_port_cit;
struct config_item_type tf_tpg_port_stat_cit;
struct config_item_type tf_tpg_np_cit;
struct config_item_type tf_tpg_np_base_cit;
struct config_item_type tf_tpg_attrib_cit;
struct config_item_type tf_tpg_auth_cit;
struct config_item_type tf_tpg_param_cit;
struct config_item_type tf_tpg_nacl_cit;
struct config_item_type tf_tpg_nacl_base_cit;
struct config_item_type tf_tpg_nacl_attrib_cit;
struct config_item_type tf_tpg_nacl_auth_cit;
struct config_item_type tf_tpg_nacl_param_cit;
struct config_item_type tf_tpg_nacl_stat_cit;
struct config_item_type tf_tpg_mappedlun_cit;
struct config_item_type tf_tpg_mappedlun_stat_cit;
};
/* target_core_alua.c */
extern struct t10_alua_lu_gp *default_lu_gp;
/* target_core_device.c */
int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev);
struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
void target_pr_kref_release(struct kref *);
void core_free_device_list_for_node(struct se_node_acl *,
struct se_portal_group *);
void core_update_device_list_access(u64, bool, struct se_node_acl *);
struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *, u64);
int core_enable_device_list_for_node(struct se_lun *, struct se_lun_acl *,
u64, bool, struct se_node_acl *, struct se_portal_group *);
void core_disable_device_list_for_node(struct se_lun *, struct se_dev_entry *,
struct se_node_acl *, struct se_portal_group *);
void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
int core_dev_add_lun(struct se_portal_group *, struct se_device *,
struct se_lun *lun);
void core_dev_del_lun(struct se_portal_group *, struct se_lun *);
struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
struct se_node_acl *, u64, int *);
int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *, struct se_lun *lun, bool);
int core_dev_del_initiator_node_lun_acl(struct se_lun *,
struct se_lun_acl *);
void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *lacl);
int core_dev_setup_virtual_lun0(void);
void core_dev_release_virtual_lun0(void);
struct se_device *target_alloc_device(struct se_hba *hba, const char *name);
int target_configure_device(struct se_device *dev);
void target_free_device(struct se_device *);
int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
void *data);
void target_dev_ua_allocate(struct se_device *dev, u8 asc, u8 ascq);
/* target_core_configfs.c */
extern struct configfs_item_operations target_core_dev_item_ops;
void target_setup_backend_cits(struct target_backend *);
/* target_core_fabric_configfs.c */
int target_fabric_setup_cits(struct target_fabric_configfs *);
/* target_core_fabric_lib.c */
int target_get_pr_transport_id_len(struct se_node_acl *nacl,
struct t10_pr_registration *pr_reg, int *format_code);
int target_get_pr_transport_id(struct se_node_acl *nacl,
struct t10_pr_registration *pr_reg, int *format_code,
unsigned char *buf);
const char *target_parse_pr_out_transport_id(struct se_portal_group *tpg,
char *buf, u32 *out_tid_len, char **port_nexus_ptr);
/* target_core_hba.c */
struct se_hba *core_alloc_hba(const char *, u32, u32);
int core_delete_hba(struct se_hba *);
/* target_core_tmr.c */
void core_tmr_abort_task(struct se_device *, struct se_tmr_req *,
struct se_session *);
int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *,
struct list_head *, struct se_cmd *);
/* target_core_tpg.c */
extern struct se_device *g_lun0_dev;
struct se_node_acl *__core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
const char *);
void core_tpg_add_node_to_devs(struct se_node_acl *, struct se_portal_group *,
struct se_lun *);
void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *);
struct se_lun *core_tpg_alloc_lun(struct se_portal_group *, u64);
int core_tpg_add_lun(struct se_portal_group *, struct se_lun *,
bool, struct se_device *);
void core_tpg_remove_lun(struct se_portal_group *, struct se_lun *);
struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *tpg,
const char *initiatorname);
void core_tpg_del_initiator_node_acl(struct se_node_acl *acl);
/* target_core_transport.c */
int init_se_kmem_caches(void);
void release_se_kmem_caches(void);
u32 scsi_get_new_index(scsi_index_t);
void transport_subsystem_check_init(void);
unsigned char *transport_dump_cmd_direction(struct se_cmd *);
void transport_dump_dev_state(struct se_device *, char *, int *);
void transport_dump_dev_info(struct se_device *, struct se_lun *,
unsigned long long, char *, int *);
void transport_dump_vpd_proto_id(struct t10_vpd *, unsigned char *, int);
int transport_dump_vpd_assoc(struct t10_vpd *, unsigned char *, int);
int transport_dump_vpd_ident_type(struct t10_vpd *, unsigned char *, int);
int transport_dump_vpd_ident(struct t10_vpd *, unsigned char *, int);
void transport_clear_lun_ref(struct se_lun *);
sense_reason_t target_cmd_size_check(struct se_cmd *cmd, unsigned int size);
void target_qf_do_work(struct work_struct *work);
void target_do_delayed_work(struct work_struct *work);
bool target_check_wce(struct se_device *dev);
bool target_check_fua(struct se_device *dev);
void __target_execute_cmd(struct se_cmd *, bool);
void target_queued_submit_work(struct work_struct *work);
/* target_core_stat.c */
void target_stat_setup_dev_default_groups(struct se_device *);
void target_stat_setup_port_default_groups(struct se_lun *);
void target_stat_setup_mappedlun_default_groups(struct se_lun_acl *);
/* target_core_xcopy.c */
extern struct se_portal_group xcopy_pt_tpg;
/* target_core_configfs.c */
#define DB_ROOT_LEN 4096
#define DB_ROOT_DEFAULT "/var/target"
#define DB_ROOT_PREFERRED "/etc/target"
extern char db_root[];
#endif /* TARGET_CORE_INTERNAL_H */
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