iscsi-target: Expose default_erl as TPG attribute

This patch exposes default_erl as a TPG attribute so that it may be
set TPG wide in demo-mode, but still allow the existing NodeACL
attribute to be overridden on a per initiator basis.

Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index fde3624..e3318ed 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1046,6 +1046,11 @@ TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
  */
 DEF_TPG_ATTRIB(demo_mode_discovery);
 TPG_ATTR(demo_mode_discovery, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_default_erl
+ */
+DEF_TPG_ATTRIB(default_erl);
+TPG_ATTR(default_erl, S_IRUGO | S_IWUSR);
 
 static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
        &iscsi_tpg_attrib_authentication.attr,
@@ -1057,6 +1062,7 @@ static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
        &iscsi_tpg_attrib_demo_mode_write_protect.attr,
        &iscsi_tpg_attrib_prod_mode_write_protect.attr,
        &iscsi_tpg_attrib_demo_mode_discovery.attr,
+       &iscsi_tpg_attrib_default_erl.attr,
        NULL,
 };
 
@@ -1919,9 +1925,12 @@ static void lio_set_default_node_attributes(struct se_node_acl *se_acl)
 {
        struct iscsi_node_acl *acl = container_of(se_acl, struct iscsi_node_acl,
                                se_node_acl);
+       struct se_portal_group *se_tpg = se_acl->se_tpg;
+       struct iscsi_portal_group *tpg = container_of(se_tpg,
+                               struct iscsi_portal_group, tpg_se_tpg);
 
        acl->node_attrib.nacl = acl;
-       iscsit_set_default_node_attribues(acl);
+       iscsit_set_default_node_attribues(acl, tpg);
 }
 
 static int lio_check_stop_free(struct se_cmd *se_cmd)

diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 8dcb3c1..48f7b3b 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -37,9 +37,6 @@
 #define NA_RANDOM_DATAIN_PDU_OFFSETS   0
 #define NA_RANDOM_DATAIN_SEQ_OFFSETS   0
 #define NA_RANDOM_R2T_OFFSETS          0
-#define NA_DEFAULT_ERL                 0
-#define NA_DEFAULT_ERL_MAX             2
-#define NA_DEFAULT_ERL_MIN             0
 
 /* struct iscsi_tpg_attrib sanity values */
 #define TA_AUTHENTICATION              1
@@ -59,6 +56,7 @@
 /* Disabled by default in production mode w/ explict ACLs */
 #define TA_PROD_MODE_WRITE_PROTECT     0
 #define TA_DEMO_MODE_DISCOVERY         1
+#define TA_DEFAULT_ERL                 0
 #define TA_CACHE_CORE_NPS              0
 
 
@@ -766,6 +764,7 @@ struct iscsi_tpg_attrib {
        u32                     demo_mode_write_protect;
        u32                     prod_mode_write_protect;
        u32                     demo_mode_discovery;
+       u32                     default_erl;
        struct iscsi_portal_group *tpg;
 };
 

diff --git a/drivers/target/iscsi/iscsi_target_nodeattrib.c b/drivers/target/iscsi/iscsi_target_nodeattrib.c
index 93bdc47..16454a9 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_nodeattrib.c
+++ b/drivers/target/iscsi/iscsi_target_nodeattrib.c
@@ -33,7 +33,8 @@ static inline char *iscsit_na_get_initiatorname(
 }
 
 void iscsit_set_default_node_attribues(
-       struct iscsi_node_acl *acl)
+       struct iscsi_node_acl *acl,
+       struct iscsi_portal_group *tpg)
 {
        struct iscsi_node_attrib *a = &acl->node_attrib;
 
@@ -44,7 +45,7 @@ void iscsit_set_default_node_attribues(
        a->random_datain_pdu_offsets = NA_RANDOM_DATAIN_PDU_OFFSETS;
        a->random_datain_seq_offsets = NA_RANDOM_DATAIN_SEQ_OFFSETS;
        a->random_r2t_offsets = NA_RANDOM_R2T_OFFSETS;
-       a->default_erl = NA_DEFAULT_ERL;
+       a->default_erl = tpg->tpg_attrib.default_erl;
 }
 
 int iscsit_na_dataout_timeout(

diff --git a/drivers/target/iscsi/iscsi_target_nodeattrib.h b/drivers/target/iscsi/iscsi_target_nodeattrib.h
index c970b32..0c69a46 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_nodeattrib.h
+++ b/drivers/target/iscsi/iscsi_target_nodeattrib.h
@@ -1,7 +1,8 @@
 #ifndef ISCSI_TARGET_NODEATTRIB_H
 #define ISCSI_TARGET_NODEATTRIB_H
 
-extern void iscsit_set_default_node_attribues(struct iscsi_node_acl *);
+extern void iscsit_set_default_node_attribues(struct iscsi_node_acl *,
+                                             struct iscsi_portal_group *);
 extern int iscsit_na_dataout_timeout(struct iscsi_node_acl *, u32);
 extern int iscsit_na_dataout_timeout_retries(struct iscsi_node_acl *, u32);
 extern int iscsit_na_nopin_timeout(struct iscsi_node_acl *, u32);

diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 98ccf0b..3976183 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -224,6 +224,7 @@ static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
        a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
        a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
        a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
+       a->default_erl = TA_DEFAULT_ERL;
 }
 
 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
@@ -840,3 +841,20 @@ int iscsit_ta_demo_mode_discovery(
 
        return 0;
 }
+
+int iscsit_ta_default_erl(
+       struct iscsi_portal_group *tpg,
+       u32 default_erl)
+{
+       struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
+
+       if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
+               pr_err("Illegal value for default_erl: %u\n", default_erl);
+               return -EINVAL;
+       }
+
+       a->default_erl = default_erl;
+       pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
+
+       return 0;
+}

diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index 3e8ce86..213c0fc 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -38,5 +38,6 @@ extern int iscsit_ta_cache_dynamic_acls(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_demo_mode_write_protect(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_prod_mode_write_protect(struct iscsi_portal_group *, u32);
 extern int iscsit_ta_demo_mode_discovery(struct iscsi_portal_group *, u32);
+extern int iscsit_ta_default_erl(struct iscsi_portal_group *, u32);
 
 #endif /* ISCSI_TARGET_TPG_H */