linux-stable.git/include/target/iscsi, branch v4.9.41

iscsi-target: Add login_keys_workaround attribute for non RFC initiators

2017-07-27T22:07:59+00:00

commit 138d351eefb727ab9e41a3dc5f112ceb4f6e59f2 upstream.

This patch re-introduces part of a long standing login workaround that
was recently dropped by:

  commit 1c99de981f30b3e7868b8d20ce5479fa1c0fea46
  Author: Nicholas Bellinger 
  Date:   Sun Apr 2 13:36:44 2017 -0700

      iscsi-target: Drop work-around for legacy GlobalSAN initiator

Namely, the workaround for FirstBurstLength ended up being required by
Mellanox Flexboot PXE boot ROMs as reported by Robert.

So this patch re-adds the work-around for FirstBurstLength within
iscsi_check_proposer_for_optional_reply(), and makes the key optional
to respond when the initiator does not propose, nor respond to it.

Also as requested by Arun, this patch introduces a new TPG attribute
named 'login_keys_workaround' that controls the use of both the
FirstBurstLength workaround, as well as the two other existing
workarounds for gPXE iSCSI boot client.

By default, the workaround is enabled with login_keys_workaround=1,
since Mellanox FlexBoot requires it, and Arun has verified the Qlogic
MSFT initiator already proposes FirstBurstLength, so it's uneffected
by this re-adding this part of the original work-around.

Reported-by: Robert LeBlanc 
Cc: Robert LeBlanc 
Reviewed-by: Arun Easi 
Signed-off-by: Nicholas Bellinger 
Signed-off-by: Greg Kroah-Hartman

cxgbit: Use type ISCSI_CXGBIT + cxgbit tpg_np attribute

2016-05-17T05:23:59+00:00

Instead of having cxgbit use type ISCSI_HW_OFFLOAD + 'hw_offload'
tpg_np attribute, it should be using it's own driver specific
type + attribute

Cc: Varun Prakash 
Cc: Hariprasad Shenai 
Cc: Christoph Hellwig 
Cc: Sagi Grimberg 
Signed-off-by: Nicholas Bellinger

iscsi-target: Convert transport drivers to signal rdma_shutdown

2016-05-17T05:23:33+00:00

Instead of special casing the handful of callers that check for
iser-target rdma verbs specific shutdown, use a simple flag at
iscsit_transport->rdma_shutdown so each driver can signal this.

Also, update iscsi-target/tcp + cxgbit to rdma_shutdown = false.

Cc: Varun Prakash 
Cc: Hariprasad Shenai 
Cc: Christoph Hellwig 
Cc: Sagi Grimberg 
Signed-off-by: Nicholas Bellinger

iscsi-target: export symbols

2016-05-10T06:12:28+00:00

export symbols for ISCSI_HW_OFFLOAD
transport drivers.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger

iscsi-target: add new offload transport type

2016-05-10T06:12:18+00:00

Add new transport type ISCSI_HW_OFFLOAD,
hw offload transport drivers will use
this transport type.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger

iscsi-target: move iscsit_thread_check_cpumask()

2016-05-10T06:12:09+00:00

Move iscsit_thread_check_cpumask() to header
file so that ISCSI_HW_OFFLOAD and other transport drivers
can call this function to ensure both tx and rx thread
runs on same cpu.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger

iscsi-target: add void (*iscsit_get_r2t_ttt)()

2016-05-10T06:12:08+00:00

Add void (*iscsit_get_r2t_ttt)() to
struct iscsit_transport, iscsi-target
uses this callback to get
r2t->targ_xfer_tag.

cxgbit.ko needs this callback
for Direct Data Placement of Data Out
pdus, adapter uses ttt in Data Out pdus
for placing data directly in to the host
buffers.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger

iscsi-target: add int (*iscsit_validate_params)()

2016-05-10T06:12:08+00:00

Add int (*iscsit_validate_params)() to
struct iscsit_transport, iscsi-target
uses this callback for validating
conn operational parameters.

cxgbit.ko needs this callback to check
and update the value of
MAXXMITDATASEGMENTLENGTH.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger

iscsi-target: add void (*iscsit_get_rx_pdu)()

2016-05-10T06:12:07+00:00

Add void (*iscsit_get_rx_pdu)() to
struct iscsit_transport, iscsi-target
uses this callback to receive and
process Rx iSCSI PDUs.

cxgbit.ko needs this callback to
reuse iscsi-target Rx thread.

Signed-off-by: Varun Prakash 
Acked-by: Sagi Grimberg 
Signed-off-by: Nicholas Bellinger

iscsi-target: add void (*iscsit_release_cmd)()

2016-05-10T06:12:06+00:00

Add void (*iscsit_release_cmd)() to
struct iscsit_transport, iscsi-target
uses this callback to release transport
driver resources associated with an iSCSI cmd.

cxgbit.ko needs this callback to release DDP
resource and sg page in case of
PASSTHROUGH_SG_TO_MEM_NOALLOC.

Signed-off-by: Varun Prakash 
Signed-off-by: Nicholas Bellinger