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scsi: target: Allow userspace to set the completion type

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This allows userspace to request if we complete in the backend context
or the frontend driver. It works the same as submission where you can
write 0 to 2 to complete_type:

 0 - Use the fabric driver's preference.

 1 - Complete from the backend calling context if the fabric supports
     it.

 2 - Queue the completion to LIO's completion workqueue.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://patch.msgid.link/20260222232946.7637-4-michael.christie@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie 2026-02-22 17:27:03 -06:00 committed by Martin K. Petersen
parent 89663fb2e5
commit e1502d990c
2 changed files with 46 additions and 0 deletions
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22
drivers/target/target_core_configfs.c
View File

@ -578,6 +578,7 @@ DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
DEF_CONFIGFS_ATTRIB_SHOW(submit_type);
DEF_CONFIGFS_ATTRIB_SHOW(complete_type);
DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len);
DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment);
DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity);
@ -1269,6 +1270,24 @@ static ssize_t submit_type_store(struct config_item *item, const char *page,
return count;
}
static ssize_t complete_type_store(struct config_item *item, const char *page,
size_t count)
{
struct se_dev_attrib *da = to_attrib(item);
int ret;
u8 val;
ret = kstrtou8(page, 0, &val);
if (ret < 0)
return ret;
if (val > TARGET_QUEUE_COMPL)
return -EINVAL;
da->complete_type = val;
return count;
}
CONFIGFS_ATTR(, emulate_model_alias);
CONFIGFS_ATTR(, emulate_dpo);
CONFIGFS_ATTR(, emulate_fua_write);
@ -1305,6 +1324,7 @@ CONFIGFS_ATTR(, max_write_same_len);
CONFIGFS_ATTR(, alua_support);
CONFIGFS_ATTR(, pgr_support);
CONFIGFS_ATTR(, submit_type);
CONFIGFS_ATTR(, complete_type);
CONFIGFS_ATTR_RO(, atomic_max_len);
CONFIGFS_ATTR_RO(, atomic_alignment);
CONFIGFS_ATTR_RO(, atomic_granularity);
@ -1353,6 +1373,7 @@ struct configfs_attribute *sbc_attrib_attrs[] = {
&attr_pgr_support,
&attr_emulate_rsoc,
&attr_submit_type,
&attr_complete_type,
&attr_atomic_alignment,
&attr_atomic_max_len,
&attr_atomic_granularity,
@ -1376,6 +1397,7 @@ struct configfs_attribute *passthrough_attrib_attrs[] = {
&attr_alua_support,
&attr_pgr_support,
&attr_submit_type,
&attr_complete_type,
NULL,
};
EXPORT_SYMBOL(passthrough_attrib_attrs);

24
drivers/target/target_core_fabric_configfs.c
View File

@ -1065,6 +1065,28 @@ target_fabric_wwn_cmd_completion_affinity_store(struct config_item *item,
}
CONFIGFS_ATTR(target_fabric_wwn_, cmd_completion_affinity);
static ssize_t
target_fabric_wwn_default_complete_type_show(struct config_item *item,
char *page)
{
struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
param_group);
return sysfs_emit(page, "%u\n",
wwn->wwn_tf->tf_ops->default_compl_type);
}
CONFIGFS_ATTR_RO(target_fabric_wwn_, default_complete_type);
static ssize_t
target_fabric_wwn_direct_complete_supported_show(struct config_item *item,
char *page)
{
struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
param_group);
return sysfs_emit(page, "%u\n",
wwn->wwn_tf->tf_ops->direct_compl_supp);
}
CONFIGFS_ATTR_RO(target_fabric_wwn_, direct_complete_supported);
static ssize_t
target_fabric_wwn_default_submit_type_show(struct config_item *item,
char *page)
@ -1089,6 +1111,8 @@ CONFIGFS_ATTR_RO(target_fabric_wwn_, direct_submit_supported);
static struct configfs_attribute *target_fabric_wwn_param_attrs[] = {
&target_fabric_wwn_attr_cmd_completion_affinity,
&target_fabric_wwn_attr_default_complete_type,
&target_fabric_wwn_attr_direct_complete_supported,
&target_fabric_wwn_attr_default_submit_type,
&target_fabric_wwn_attr_direct_submit_supported,
NULL,