target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lun
This patch eliminates all se_port + t10_alua_tg_pt_gp_member usage,
and converts current users to direct se_lun pointer dereference.
This includes the removal of core_export_port(), core_release_port()
core_dev_export() and core_dev_unexport(). Along with conversion
of special case se_lun pointer dereference within PR ALL_TG_PT=1
and ALUA access state transition UNIT_ATTENTION handling.
Also, update core_enable_device_list_for_node() to reference the
new per se_lun->lun_deve_list when creating a new entry, or
replacing an existing one via RCU.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index ee7abdd..1927dd5 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -304,22 +304,13 @@
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;
@@ -650,6 +641,7 @@
#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;
@@ -697,7 +689,14 @@
struct config_group scsi_transport_group;
};
+struct scsi_port_stats {
+ u32 cmd_pdus;
+ u64 tx_data_octets;
+ u64 rx_data_octets;
+};
+
struct se_lun {
+ /* RELATIVE TARGET PORT IDENTIFER */
u16 lun_rtpi;
#define SE_LUN_LINK_MAGIC 0xffff7771
u32 lun_link_magic;
@@ -707,12 +706,30 @@
u32 lun_index;
atomic_t lun_acl_count;
spinlock_t lun_sep_lock;
- 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;
+
+ atomic_t lun_active;
+ 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;
};
@@ -737,7 +754,6 @@
#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 */
@@ -754,7 +770,7 @@
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;
@@ -821,32 +837,6 @@
struct target_backend *backend;
};
-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 se_tpg_np {
struct se_portal_group *tpg_np_parent;
struct config_group tpg_np_group;
@@ -872,7 +862,7 @@
/* linked list for initiator ACL list */
struct list_head acl_node_list;
struct hlist_head tpg_lun_hlist;
- struct se_lun tpg_virt_lun0;
+ 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 */