[SCSI] libiscsi,iser: patch for AHS support

  - The default initialization of hdr_max is the minimum -
    sizeof(struct iscsi_cmd) - Once this patch goes into iser the default
    initialization at libiscsi can be removed.
  - This is not yet full support for AHSs at iser end. But it should be easy.
    Just allocate more space at iser_desc right after iscsi_hdr. Than
    at transmission time use ctask->hdr_len to retrieve the total
    size of all iscsi pdu headers. See previous patch at iscsi_tcp.[ch]

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.c b/drivers/infiniband/ulp/iser/iscsi_iser.c
index 2eadb6d..a2622f4 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.c
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.c
@@ -400,6 +400,7 @@ iscsi_iser_session_create(struct iscsi_transport *iscsit,
                ctask      = session->cmds[i];
                iser_ctask = ctask->dd_data;
                ctask->hdr = (struct iscsi_cmd *)&iser_ctask->desc.iscsi_header;
+               ctask->hdr_max = sizeof(iser_ctask->desc.iscsi_header);
        }
 
        for (i = 0; i < session->mgmtpool_max; i++) {

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 0d7914f..5936586 100644 (file)
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1570,7 +1570,6 @@ iscsi_session_setup(struct iscsi_transport *iscsit,
                if (cmd_task_size)
                        ctask->dd_data = &ctask[1];
                ctask->itt = cmd_i;
-               ctask->hdr_max = sizeof(struct iscsi_cmd);
                INIT_LIST_HEAD(&ctask->running);
        }