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authorNicholas Bellinger <nab@linux-iscsi.org>2015-03-30 05:36:16 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2015-04-08 09:27:48 +0300
commit901c04a33f138e5fb935a1621375a1a0997fe7b1 (patch)
treef56b32598102c83b8373a39b00512db37b30eb0b /drivers/target/iscsi/iscsi_target_configfs.c
parent64b16887749fd8e8000cc2ad1acca3cd29f84086 (diff)
downloadlinux-901c04a33f138e5fb935a1621375a1a0997fe7b1.tar.xz
iscsi/iser-target: Add fabric_prot_type attribute support
This patch updates iscsi/iser-target to add a new fabric_prot_type TPG attribute for iser-target, used for controlling LLD level protection into LIO when the backend device does not support T10-PI. This is required for ib_isert to enable WRITE_STRIP + READ_INSERT hardware offloads. It's disabled by default and controls which se_sesion->sess_prot_type are set at iscsi_target_locate_portal() session registration time. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Martin Petersen <martin.petersen@oracle.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target_configfs.c')
-rw-r--r--drivers/target/iscsi/iscsi_target_configfs.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 95a67f604073..9cb5ab472a52 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1052,6 +1052,11 @@ TPG_ATTR(default_erl, S_IRUGO | S_IWUSR);
*/
DEF_TPG_ATTRIB(t10_pi);
TPG_ATTR(t10_pi, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_fabric_prot_type
+ */
+DEF_TPG_ATTRIB(fabric_prot_type);
+TPG_ATTR(fabric_prot_type, S_IRUGO | S_IWUSR);
static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_authentication.attr,
@@ -1065,6 +1070,7 @@ static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
&iscsi_tpg_attrib_demo_mode_discovery.attr,
&iscsi_tpg_attrib_default_erl.attr,
&iscsi_tpg_attrib_t10_pi.attr,
+ &iscsi_tpg_attrib_fabric_prot_type.attr,
NULL,
};
@@ -1882,6 +1888,20 @@ static int lio_tpg_check_prod_mode_write_protect(
return tpg->tpg_attrib.prod_mode_write_protect;
}
+static int lio_tpg_check_prot_fabric_only(
+ struct se_portal_group *se_tpg)
+{
+ struct iscsi_portal_group *tpg = se_tpg->se_tpg_fabric_ptr;
+ /*
+ * Only report fabric_prot_type if t10_pi has also been enabled
+ * for incoming ib_isert sessions.
+ */
+ if (!tpg->tpg_attrib.t10_pi)
+ return 0;
+
+ return tpg->tpg_attrib.fabric_prot_type;
+}
+
static void lio_tpg_release_fabric_acl(
struct se_portal_group *se_tpg,
struct se_node_acl *se_acl)
@@ -1997,6 +2017,8 @@ int iscsi_target_register_configfs(void)
&lio_tpg_check_demo_mode_write_protect;
fabric->tf_ops.tpg_check_prod_mode_write_protect =
&lio_tpg_check_prod_mode_write_protect;
+ fabric->tf_ops.tpg_check_prot_fabric_only =
+ &lio_tpg_check_prot_fabric_only;
fabric->tf_ops.tpg_alloc_fabric_acl = &lio_tpg_alloc_fabric_acl;
fabric->tf_ops.tpg_release_fabric_acl = &lio_tpg_release_fabric_acl;
fabric->tf_ops.tpg_get_inst_index = &lio_tpg_get_inst_index;