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Target/iscsi: Add T10-PI indication for iscsi_portal_group

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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>
This commit is contained in:
Sagi Grimberg 2014-02-19 17:50:19 +02:00 committed by Nicholas Bellinger
parent 48f5e7b3dc
commit 5b168dcd6a
2 changed files with 6 additions and 1 deletions
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5
drivers/target/iscsi/iscsi_target_core.h
View File

@ -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 {

2
drivers/target/iscsi/iscsi_target_tpg.c
View File

@ -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);