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Commit 5b168dcd authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Nicholas Bellinger
Browse files

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: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent 48f5e7b3

drivers/target/iscsi/iscsi_target_core.h

+4 −1
Original line number Diff line number Diff line
@@ -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 {

drivers/target/iscsi/iscsi_target_tpg.c

+2 −0
Original line number Diff line number Diff line
@@ -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);