From e70beee783d6977d80eede88a3394f02eabddad1 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger Date: Wed, 2 Apr 2014 12:52:38 -0700 Subject: target: Pass in transport supported PI at session initialization In order to support local WRITE_INSERT + READ_STRIP operations for non PI enabled fabrics, the fabric driver needs to be able signal what protection offload operations are supported. This is done at session initialization time so the modes can be signaled by individual se_wwn + se_portal_group endpoints, as well as optionally across different transports on the same endpoint. For iser-target, set TARGET_PROT_ALL if the underlying ib_device has already signaled PI offload support, and allow this to be exposed via a new iscsit_transport->iscsit_get_sup_prot_ops() callback. For loopback, set TARGET_PROT_ALL to signal SCSI initiator mode operation. For all other drivers, set TARGET_PROT_NORMAL to disable fabric level PI. Cc: Martin K. Petersen Cc: Sagi Grimberg Cc: Or Gerlitz Cc: Quinn Tran Cc: Giridhar Malavali Signed-off-by: Nicholas Bellinger [[stefanr: only sbp part included here]] --- drivers/infiniband/ulp/isert/ib_isert.c | 13 +++++++++++++ drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- drivers/scsi/qla2xxx/tcm_qla2xxx.c | 2 +- drivers/target/iscsi/iscsi_target.c | 6 ++++++ drivers/target/iscsi/iscsi_target_login.c | 4 +++- drivers/target/loopback/tcm_loop.c | 2 +- drivers/target/sbp/sbp_target.c | 2 +- drivers/target/target_core_transport.c | 8 +++++--- drivers/target/tcm_fc/tfc_sess.c | 3 ++- drivers/usb/gadget/tcm_usb_gadget.c | 2 +- drivers/vhost/scsi.c | 3 ++- include/target/iscsi/iscsi_transport.h | 1 + include/target/target_core_base.h | 19 ++++++++++++------- include/target/target_core_fabric.h | 5 +++-- 14 files changed, 52 insertions(+), 20 deletions(-) --- a/drivers/target/sbp/sbp_target.c +++ b/drivers/target/sbp/sbp_target.c @@ -210,7 +210,7 @@ static struct sbp_session *sbp_session_create( return ERR_PTR(-ENOMEM); } - sess->se_sess = transport_init_session(); + sess->se_sess = transport_init_session(TARGET_PROT_NORMAL); if (IS_ERR(sess->se_sess)) { pr_err("failed to init se_session\n");