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target: Add per device xcopy_lun for copy offload I/O

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This patch adds a se_device->xcopy_lun that is used for local
copy offload I/O, instead of allocating + initializing a pseudo
se_lun for each received EXTENDED_COPY operation.

Also, move declaration of struct se_lun + struct se_port_stat_grps
ahead of struct se_device.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger
2013-11-08 13:10:44 -08:00
parent 4a9a6c8d53
commit 4863e52565
3 changed files with 39 additions and 45 deletions
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57
include/target/target_core_base.h
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@@ -627,6 +627,34 @@ struct se_dev_attrib {
struct config_group da_group;
};
struct se_port_stat_grps {
struct config_group stat_group;
struct config_group scsi_port_group;
struct config_group scsi_tgt_port_group;
struct config_group scsi_transport_group;
};
struct se_lun {
#define SE_LUN_LINK_MAGIC 0xffff7771
u32 lun_link_magic;
/* 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_sep_lock;
struct completion lun_shutdown_comp;
struct list_head lun_acl_list;
struct se_device *lun_se_dev;
struct se_port *lun_sep;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
struct percpu_ref lun_ref;
};
struct se_dev_stat_grps {
struct config_group stat_group;
struct config_group scsi_dev_group;
@@ -710,6 +738,7 @@ struct se_device {
struct se_subsystem_api *transport;
/* Linked list for struct se_hba struct se_device list */
struct list_head dev_list;
struct se_lun xcopy_lun;
};
struct se_hba {
@@ -729,34 +758,6 @@ struct se_hba {
struct se_subsystem_api *transport;
};
struct se_port_stat_grps {
struct config_group stat_group;
struct config_group scsi_port_group;
struct config_group scsi_tgt_port_group;
struct config_group scsi_transport_group;
};
struct se_lun {
#define SE_LUN_LINK_MAGIC 0xffff7771
u32 lun_link_magic;
/* 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_sep_lock;
struct completion lun_shutdown_comp;
struct list_head lun_acl_list;
struct se_device *lun_se_dev;
struct se_port *lun_sep;
struct config_group lun_group;
struct se_port_stat_grps port_stat_grps;
struct completion lun_ref_comp;
struct percpu_ref lun_ref;
};
struct scsi_port_stats {
u64 cmd_pdus;
u64 tx_data_octets;