[PATCH 6/6] iscsi-target: Change iscsi_target_seq_pdu_list.c to honor MaxXmitDataSegmentLength
From: Nicholas A. Bellinger
Date: Sun Sep 30 2012 - 02:05:19 EST
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch converts iscsi_target_seq_pdu_list.c code for DataSequenceInOrder=No +
DataPDUInOrder=No operation to honor the MaxXmitDataSegmentLength value
for iscsi_cmd->se_cmd.data_direction == DMA_TO_DEVICE cases.
Cc: Mike Christie <michaelc@xxxxxxxxxxx>
Cc: Andy Grover <agrover@xxxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxx>
Cc: Roland Dreier <roland@xxxxxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target_seq_pdu_list.c | 61 +++++++++++-----------
1 files changed, 31 insertions(+), 30 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target_seq_pdu_list.c b/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
index 85a306e..edb592a 100644
--- a/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
+++ b/drivers/target/iscsi/iscsi_target_seq_pdu_list.c
@@ -219,8 +219,14 @@ static void iscsit_determine_counts_for_list(
int check_immediate = 0;
u32 burstlength = 0, offset = 0;
u32 unsolicited_data_length = 0;
+ u32 mdsl;
struct iscsi_conn *conn = cmd->conn;
+ if (cmd->se_cmd.data_direction == DMA_TO_DEVICE)
+ mdsl = cmd->conn->conn_ops->MaxXmitDataSegmentLength;
+ else
+ mdsl = cmd->conn->conn_ops->MaxRecvDataSegmentLength;
+
if ((bl->type == PDULIST_IMMEDIATE) ||
(bl->type == PDULIST_IMMEDIATE_AND_UNSOLICITED))
check_immediate = 1;
@@ -243,14 +249,13 @@ static void iscsit_determine_counts_for_list(
continue;
}
if (unsolicited_data_length > 0) {
- if ((offset + conn->conn_ops->MaxRecvDataSegmentLength)
- >= cmd->se_cmd.data_length) {
+ if ((offset + mdsl) >= cmd->se_cmd.data_length) {
unsolicited_data_length -=
(cmd->se_cmd.data_length - offset);
offset += (cmd->se_cmd.data_length - offset);
continue;
}
- if ((offset + conn->conn_ops->MaxRecvDataSegmentLength)
+ if ((offset + mdsl)
>= conn->sess->sess_ops->FirstBurstLength) {
unsolicited_data_length -=
(conn->sess->sess_ops->FirstBurstLength -
@@ -262,17 +267,15 @@ static void iscsit_determine_counts_for_list(
continue;
}
- offset += conn->conn_ops->MaxRecvDataSegmentLength;
- unsolicited_data_length -=
- conn->conn_ops->MaxRecvDataSegmentLength;
+ offset += mdsl;
+ unsolicited_data_length -= mdsl;
continue;
}
- if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
- cmd->se_cmd.data_length) {
+ if ((offset + mdsl) >= cmd->se_cmd.data_length) {
offset += (cmd->se_cmd.data_length - offset);
continue;
}
- if ((burstlength + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ if ((burstlength + mdsl) >=
conn->sess->sess_ops->MaxBurstLength) {
offset += (conn->sess->sess_ops->MaxBurstLength -
burstlength);
@@ -281,8 +284,8 @@ static void iscsit_determine_counts_for_list(
continue;
}
- burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
- offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ burstlength += mdsl;
+ offset += mdsl;
}
}
@@ -296,12 +299,17 @@ static int iscsit_do_build_pdu_and_seq_lists(
struct iscsi_build_list *bl)
{
int check_immediate = 0, datapduinorder, datasequenceinorder;
- u32 burstlength = 0, offset = 0, i = 0;
+ u32 burstlength = 0, offset = 0, i = 0, mdsl;
u32 pdu_count = 0, seq_no = 0, unsolicited_data_length = 0;
struct iscsi_conn *conn = cmd->conn;
struct iscsi_pdu *pdu = cmd->pdu_list;
struct iscsi_seq *seq = cmd->seq_list;
+ if (cmd->se_cmd.data_direction == DMA_TO_DEVICE)
+ mdsl = cmd->conn->conn_ops->MaxXmitDataSegmentLength;
+ else
+ mdsl = cmd->conn->conn_ops->MaxRecvDataSegmentLength;
+
datapduinorder = conn->sess->sess_ops->DataPDUInOrder;
datasequenceinorder = conn->sess->sess_ops->DataSequenceInOrder;
@@ -348,9 +356,7 @@ static int iscsit_do_build_pdu_and_seq_lists(
continue;
}
if (unsolicited_data_length > 0) {
- if ((offset +
- conn->conn_ops->MaxRecvDataSegmentLength) >=
- cmd->se_cmd.data_length) {
+ if ((offset + mdsl) >= cmd->se_cmd.data_length) {
if (!datapduinorder) {
pdu[i].type = PDUTYPE_UNSOLICITED;
pdu[i].length =
@@ -367,8 +373,7 @@ static int iscsit_do_build_pdu_and_seq_lists(
offset += (cmd->se_cmd.data_length - offset);
continue;
}
- if ((offset +
- conn->conn_ops->MaxRecvDataSegmentLength) >=
+ if ((offset + mdsl) >=
conn->sess->sess_ops->FirstBurstLength) {
if (!datapduinorder) {
pdu[i].type = PDUTYPE_UNSOLICITED;
@@ -396,17 +401,14 @@ static int iscsit_do_build_pdu_and_seq_lists(
if (!datapduinorder) {
pdu[i].type = PDUTYPE_UNSOLICITED;
- pdu[i++].length =
- conn->conn_ops->MaxRecvDataSegmentLength;
+ pdu[i++].length = mdsl;
}
- burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
- offset += conn->conn_ops->MaxRecvDataSegmentLength;
- unsolicited_data_length -=
- conn->conn_ops->MaxRecvDataSegmentLength;
+ burstlength += mdsl;
+ offset += mdsl;
+ unsolicited_data_length -= mdsl;
continue;
}
- if ((offset + conn->conn_ops->MaxRecvDataSegmentLength) >=
- cmd->se_cmd.data_length) {
+ if ((offset + mdsl) >= cmd->se_cmd.data_length) {
if (!datapduinorder) {
pdu[i].type = PDUTYPE_NORMAL;
pdu[i].length = (cmd->se_cmd.data_length - offset);
@@ -420,7 +422,7 @@ static int iscsit_do_build_pdu_and_seq_lists(
offset += (cmd->se_cmd.data_length - offset);
continue;
}
- if ((burstlength + conn->conn_ops->MaxRecvDataSegmentLength) >=
+ if ((burstlength + mdsl) >=
conn->sess->sess_ops->MaxBurstLength) {
if (!datapduinorder) {
pdu[i].type = PDUTYPE_NORMAL;
@@ -445,11 +447,10 @@ static int iscsit_do_build_pdu_and_seq_lists(
if (!datapduinorder) {
pdu[i].type = PDUTYPE_NORMAL;
- pdu[i++].length =
- conn->conn_ops->MaxRecvDataSegmentLength;
+ pdu[i++].length = mdsl;
}
- burstlength += conn->conn_ops->MaxRecvDataSegmentLength;
- offset += conn->conn_ops->MaxRecvDataSegmentLength;
+ burstlength += mdsl;
+ offset += mdsl;
}
if (!datasequenceinorder) {
--
1.7.2.5
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