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loopback: Add fabric_prot_type attribute support

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This patch updates loopback to add a new fabric_prot_type TPG attribute,
used for controlling LLD level protection into LIO when the backend
device does not support T10-PI.

Also, go ahead and set DIN_PASS + DOUT_PASS so target-core knows that
it will be doing any WRITE_STRIP and READ_INSERT operations.

Cc: Martin Petersen <martin.petersen@oracle.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2015-02-08 12:31:39 -08:00
parent 1762742f3f
commit 436f4a0a99
2 changed files with 53 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/target/loopback/tcm_loop.c
View File

@ -697,6 +697,13 @@ static int tcm_loop_check_prod_mode_write_protect(struct se_portal_group *se_tpg
return 0;
}
static int tcm_loop_check_prot_fabric_only(struct se_portal_group *se_tpg)
{
struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg,
tl_se_tpg);
return tl_tpg->tl_fabric_prot_type;
}
static struct se_node_acl *tcm_loop_tpg_alloc_fabric_acl(
struct se_portal_group *se_tpg)
{
@ -912,6 +919,46 @@ static void tcm_loop_port_unlink(
/* End items for tcm_loop_port_cit */
static ssize_t tcm_loop_tpg_attrib_show_fabric_prot_type(
struct se_portal_group *se_tpg,
char *page)
{
struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg,
tl_se_tpg);
return sprintf(page, "%d\n", tl_tpg->tl_fabric_prot_type);
}
static ssize_t tcm_loop_tpg_attrib_store_fabric_prot_type(
struct se_portal_group *se_tpg,
const char *page,
size_t count)
{
struct tcm_loop_tpg *tl_tpg = container_of(se_tpg, struct tcm_loop_tpg,
tl_se_tpg);
unsigned long val;
int ret = kstrtoul(page, 0, &val);
if (ret) {
pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
return ret;
}
if (val != 0 && val != 1 && val != 3) {
pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
return -EINVAL;
}
tl_tpg->tl_fabric_prot_type = val;
return count;
}
TF_TPG_ATTRIB_ATTR(tcm_loop, fabric_prot_type, S_IRUGO | S_IWUSR);
static struct configfs_attribute *tcm_loop_tpg_attrib_attrs[] = {
&tcm_loop_tpg_attrib_fabric_prot_type.attr,
NULL,
};
/* Start items for tcm_loop_nexus_cit */
static int tcm_loop_make_nexus(
@ -937,7 +984,8 @@ static int tcm_loop_make_nexus(
/*
* Initialize the struct se_session pointer
*/
tl_nexus->se_sess = transport_init_session(TARGET_PROT_ALL);
tl_nexus->se_sess = transport_init_session(
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS);
if (IS_ERR(tl_nexus->se_sess)) {
ret = PTR_ERR(tl_nexus->se_sess);
goto out;
@ -1377,6 +1425,8 @@ static int tcm_loop_register_configfs(void)
&tcm_loop_check_demo_mode_write_protect;
fabric->tf_ops.tpg_check_prod_mode_write_protect =
&tcm_loop_check_prod_mode_write_protect;
fabric->tf_ops.tpg_check_prot_fabric_only =
&tcm_loop_check_prot_fabric_only;
/*
* The TCM loopback fabric module runs in demo-mode to a local
* virtual SCSI device, so fabric dependent initator ACLs are
@ -1429,7 +1479,7 @@ static int tcm_loop_register_configfs(void)
*/
fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_loop_wwn_attrs;
fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_loop_tpg_attrs;
fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = tcm_loop_tpg_attrib_attrs;
fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
/*

1
drivers/target/loopback/tcm_loop.h
View File

@ -43,6 +43,7 @@ struct tcm_loop_nacl {
struct tcm_loop_tpg {
unsigned short tl_tpgt;
unsigned short tl_transport_status;
enum target_prot_type tl_fabric_prot_type;
atomic_t tl_tpg_port_count;
struct se_portal_group tl_se_tpg;
struct tcm_loop_hba *tl_hba;