diff options
author | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-09-29 22:34:10 -0700 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-10-02 13:17:33 -0700 |
commit | b094a4bd840e6f268f70a79a099debaf235e44e5 (patch) | |
tree | df538c10b5267d349301b59542e8f9ac13ed3342 /drivers/target/iscsi | |
parent | 1c417f39c1f896206f0d5bfec65cd61a8f5e69b8 (diff) | |
download | op-kernel-dev-b094a4bd840e6f268f70a79a099debaf235e44e5.zip op-kernel-dev-b094a4bd840e6f268f70a79a099debaf235e44e5.tar.gz |
iscsi-target: Change iscsi_target_seq_pdu_list.c to honor MaxXmitDataSegmentLength
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@cs.wisc.edu>
Cc: Andy Grover <agrover@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi')
-rw-r--r-- | 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) { |