[SCSI] iscsi: bidi support for iscsi_tcp

access the right scsi_in() and/or scsi_out() side of things.
also for resid

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

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 8a17867..72b9b2a 100644 (file)
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -528,6 +528,7 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
        struct iscsi_session *session = conn->session;
        struct scsi_cmnd *sc = ctask->sc;
        int datasn = be32_to_cpu(rhdr->datasn);
+       unsigned total_in_length = scsi_in(sc)->length;
 
        iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr);
        if (tcp_conn->in.datalen == 0)
@@ -542,10 +543,10 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
        tcp_ctask->exp_datasn++;
 
        tcp_ctask->data_offset = be32_to_cpu(rhdr->offset);
-       if (tcp_ctask->data_offset + tcp_conn->in.datalen > scsi_bufflen(sc)) {
+       if (tcp_ctask->data_offset + tcp_conn->in.datalen > total_in_length) {
                debug_tcp("%s: data_offset(%d) + data_len(%d) > total_length_in(%d)\n",
                          __FUNCTION__, tcp_ctask->data_offset,
-                         tcp_conn->in.datalen, scsi_bufflen(sc));
+                         tcp_conn->in.datalen, total_in_length);
                return ISCSI_ERR_DATA_OFFSET;
        }
 
@@ -558,8 +559,8 @@ iscsi_data_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 
                        if (res_count > 0 &&
                            (rhdr->flags & ISCSI_FLAG_CMD_OVERFLOW ||
-                            res_count <= scsi_bufflen(sc)))
-                               scsi_set_resid(sc, res_count);
+                            res_count <= total_in_length))
+                               scsi_in(sc)->resid = res_count;
                        else
                                sc->result = (DID_BAD_TARGET << 16) |
                                        rhdr->cmd_status;
@@ -670,11 +671,11 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
                            r2t->data_length, session->max_burst);
 
        r2t->data_offset = be32_to_cpu(rhdr->data_offset);
-       if (r2t->data_offset + r2t->data_length > scsi_bufflen(ctask->sc)) {
+       if (r2t->data_offset + r2t->data_length > scsi_out(ctask->sc)->length) {
                iscsi_conn_printk(KERN_ERR, conn,
                                  "invalid R2T with data len %u at offset %u "
                                  "and total length %d\n", r2t->data_length,
-                                 r2t->data_offset, scsi_bufflen(ctask->sc));
+                                 r2t->data_offset, scsi_out(ctask->sc)->length);
                __kfifo_put(tcp_ctask->r2tpool.queue, (void*)&r2t,
                            sizeof(void*));
                return ISCSI_ERR_DATALEN;
@@ -771,6 +772,7 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
                if (tcp_conn->in.datalen) {
                        struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
                        struct hash_desc *rx_hash = NULL;
+                       struct scsi_data_buffer *sdb = scsi_in(ctask->sc);
 
                        /*
                         * Setup copy of Data-In into the Scsi_Cmnd
@@ -788,8 +790,8 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
                                  tcp_ctask->data_offset,
                                  tcp_conn->in.datalen);
                        return iscsi_segment_seek_sg(&tcp_conn->in.segment,
-                                                    scsi_sglist(ctask->sc),
-                                                    scsi_sg_count(ctask->sc),
+                                                    sdb->table.sgl,
+                                                    sdb->table.nents,
                                                     tcp_ctask->data_offset,
                                                     tcp_conn->in.datalen,
                                                     iscsi_tcp_process_data_in,
@@ -1332,7 +1334,8 @@ iscsi_tcp_ctask_init(struct iscsi_cmd_task *ctask)
                return 0;
 
        /* If we have immediate data, attach a payload */
-       err = iscsi_tcp_send_data_prep(conn, scsi_sglist(sc), scsi_sg_count(sc),
+       err = iscsi_tcp_send_data_prep(conn, scsi_out(sc)->table.sgl,
+                                      scsi_out(sc)->table.nents,
                                       0, ctask->imm_count);
        if (err)
                return err;
@@ -1386,6 +1389,7 @@ iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
 {
        struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
        struct scsi_cmnd *sc = ctask->sc;
+       struct scsi_data_buffer *sdb = scsi_out(sc);
        int rc = 0;
 
 flush:
@@ -1412,9 +1416,8 @@ flush:
                                ctask->itt, tcp_ctask->sent, ctask->data_count);
 
                iscsi_tcp_send_hdr_prep(conn, hdr, sizeof(*hdr));
-               rc = iscsi_tcp_send_data_prep(conn, scsi_sglist(sc),
-                                             scsi_sg_count(sc),
-                                             tcp_ctask->sent,
+               rc = iscsi_tcp_send_data_prep(conn, sdb->table.sgl,
+                                             sdb->table.nents, tcp_ctask->sent,
                                              ctask->data_count);
                if (rc)
                        goto fail;
@@ -1460,8 +1463,8 @@ flush:
                iscsi_tcp_send_hdr_prep(conn, &r2t->dtask.hdr,
                                        sizeof(struct iscsi_hdr));
 
-               rc = iscsi_tcp_send_data_prep(conn, scsi_sglist(sc),
-                                             scsi_sg_count(sc),
+               rc = iscsi_tcp_send_data_prep(conn, sdb->table.sgl,
+                                             sdb->table.nents,
                                              r2t->data_offset + r2t->sent,
                                              r2t->data_count);
                if (rc)