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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 <[email protected]>
This commit is contained in:
Nicholas Bellinger 2013-11-08 13:10:44 -08:00
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;
}