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authorSagi Grimberg <sagig@mellanox.com>2014-02-19 17:50:19 +0200
committerNicholas Bellinger <nab@linux-iscsi.org>2014-04-07 01:48:43 -0700
commit5b168dcd6aa69f7421a7738eada749d376dd1253 (patch)
tree89bf96930fc011263b59a6a8f106285015dac869 /drivers/target
parent48f5e7b3dc1eb88cdc7772bd6a7bbb99c8843ae0 (diff)
downloadop-kernel-dev-5b168dcd6aa69f7421a7738eada749d376dd1253.zip
op-kernel-dev-5b168dcd6aa69f7421a7738eada749d376dd1253.tar.gz
Target/iscsi: Add T10-PI indication for iscsi_portal_group
In case an iscsi portal group will be defined as t10_pi enabled, all connections on top of it will support protected transactions. T10-PI support may require extra reource allocation and maintenance by the transport layer, so we don't want to apply them on non-t10_pi network portals. This is a hook for the iscsi target layer to signal the transport at connection establishment that this connection will carry protected transactions. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target_core.h5
-rw-r--r--drivers/target/iscsi/iscsi_target_tpg.c2
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/target/iscsi/iscsi_target_core.h b/drivers/target/iscsi/iscsi_target_core.h
index 48f7b3b..886d74d 100644
--- a/drivers/target/iscsi/iscsi_target_core.h
+++ b/drivers/target/iscsi/iscsi_target_core.h
@@ -58,7 +58,8 @@
#define TA_DEMO_MODE_DISCOVERY 1
#define TA_DEFAULT_ERL 0
#define TA_CACHE_CORE_NPS 0
-
+/* T10 protection information disabled by default */
+#define TA_DEFAULT_T10_PI 0
#define ISCSI_IOV_DATA_BUFFER 5
@@ -765,6 +766,7 @@ struct iscsi_tpg_attrib {
u32 prod_mode_write_protect;
u32 demo_mode_discovery;
u32 default_erl;
+ u8 t10_pi;
struct iscsi_portal_group *tpg;
};
@@ -787,6 +789,7 @@ struct iscsi_np {
void *np_context;
struct iscsit_transport *np_transport;
struct list_head np_list;
+ struct iscsi_tpg_np *tpg_np;
} ____cacheline_aligned;
struct iscsi_tpg_np {
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 44a5471..76c2b24 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -225,6 +225,7 @@ static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
a->default_erl = TA_DEFAULT_ERL;
+ a->t10_pi = TA_DEFAULT_T10_PI;
}
int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
@@ -500,6 +501,7 @@ struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
init_completion(&tpg_np->tpg_np_comp);
kref_init(&tpg_np->tpg_np_kref);
tpg_np->tpg_np = np;
+ np->tpg_np = tpg_np;
tpg_np->tpg = tpg;
spin_lock(&tpg->tpg_np_lock);
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