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[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>
This commit is contained in:
Boaz Harrosh 2008-04-18 10:11:53 -05:00 committed by James Bottomley
parent c07d444407
commit 94795b61e8
1 changed files with 17 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/scsi/iscsi_tcp.c
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@ -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)