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target: Subsume se_port + t10_alua_tg_pt_gp_member into se_lun

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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>
This commit is contained in:
Christoph Hellwig
2015-05-25 21:33:08 -07:00
committed by Nicholas Bellinger
parent b3eeea6619
commit adf653f92f
13 changed files with 461 additions and 810 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
include/target/target_core_base.h
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@@ -304,22 +304,13 @@ 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;
@@ -650,6 +641,7 @@ struct se_dev_entry {
#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 se_port_stat_grps {
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 @@ struct se_lun {
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 @@ 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 */
@@ -754,7 +770,7 @@ 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;
@@ -821,32 +837,6 @@ struct se_hba {
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 @@ struct se_portal_group {
/* 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 */