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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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9
drivers/target/target_core_device.c
View file

@ -1409,6 +1409,7 @@ static void scsi_dump_inquiry(struct se_device *dev)
struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
{
struct se_device *dev;
struct se_lun *xcopy_lun;
dev = hba->transport->alloc_device(hba, name);
if (!dev)
@ -1471,6 +1472,14 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
xcopy_lun = &dev->xcopy_lun;
xcopy_lun->lun_se_dev = dev;
init_completion(&xcopy_lun->lun_shutdown_comp);
INIT_LIST_HEAD(&xcopy_lun->lun_acl_list);
spin_lock_init(&xcopy_lun->lun_acl_lock);
spin_lock_init(&xcopy_lun->lun_sep_lock);
init_completion(&xcopy_lun->lun_ref_comp);
return dev;
}

18
drivers/target/target_core_xcopy.c
View file

@ -401,9 +401,6 @@ static void xcopy_pt_release_cmd(struct se_cmd *se_cmd)
struct xcopy_pt_cmd *xpt_cmd = container_of(se_cmd,
struct xcopy_pt_cmd, se_cmd);
if (xpt_cmd->remote_port)
kfree(se_cmd->se_lun);
kfree(xpt_cmd);
}
@ -568,21 +565,10 @@ static int target_xcopy_init_pt_lun(
return 0;
}
pt_cmd->se_lun = kzalloc(sizeof(struct se_lun), GFP_KERNEL);
if (!pt_cmd->se_lun) {
pr_err("Unable to allocate pt_cmd->se_lun\n");
return -ENOMEM;
}
init_completion(&pt_cmd->se_lun->lun_shutdown_comp);
INIT_LIST_HEAD(&pt_cmd->se_lun->lun_acl_list);
spin_lock_init(&pt_cmd->se_lun->lun_acl_lock);
spin_lock_init(&pt_cmd->se_lun->lun_sep_lock);
init_completion(&pt_cmd->se_lun->lun_ref_comp);
pt_cmd->se_lun = &se_dev->xcopy_lun;
pt_cmd->se_dev = se_dev;
pr_debug("Setup emulated se_dev: %p from se_dev\n", pt_cmd->se_dev);
pt_cmd->se_lun->lun_se_dev = se_dev;
pt_cmd->se_cmd_flags |= SCF_SE_LUN_CMD | SCF_CMD_XCOPY_PASSTHROUGH;
pr_debug("Setup emulated se_dev: %p to pt_cmd->se_lun->lun_se_dev\n",
@ -653,8 +639,6 @@ static int target_xcopy_setup_pt_cmd(
return 0;
out:
if (remote_port == true)
kfree(cmd->se_lun);
return ret;
}

57
include/target/target_core_base.h
View file

@ -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;