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iser: send immediate data

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When ImmediateData=Yes, DataSegmentLength is set in iSCSI layer
but immediate data is not sent in the RCaP message.

Signed-off-by: wanghonghao <wanghonghao@bytedance.com>
This commit is contained in:
wanghonghao
2019-12-04 13:39:28 +08:00
parent 51391285d8
commit dfbc6697ae
1 changed files with 16 additions and 2 deletions
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18
lib/iser.c
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@@ -570,7 +570,8 @@ iser_prepare_write_cmd(struct iser_conn *iser_conn, struct iser_pdu *iser_pdu)
struct iser_hdr *hdr = &iser_pdu->desc->iser_header;
struct iscsi_context *iscsi = iser_conn->cma_id->context;
struct iser_tx_desc *tx_desc = iser_pdu->desc;
struct scsi_iovector *iovector = iscsi_get_scsi_task_iovector_out(iscsi, &iser_pdu->iscsi_pdu);
struct iscsi_pdu *iscsi_pdu = &iser_pdu->iscsi_pdu;
struct scsi_iovector *iovector = iscsi_get_scsi_task_iovector_out(iscsi, iscsi_pdu);
int i, offset = 0;
if (iovector == NULL) {
@@ -587,7 +588,20 @@ iser_prepare_write_cmd(struct iser_conn *iser_conn, struct iser_pdu *iser_pdu)
hdr->flags |= ISER_WSV;
hdr->write_stag = htobe32((uint32_t)(tx_desc->data_mr->rkey));
hdr->write_va = htobe64((intptr_t)(tx_desc->data_buff));
// ImmediateData
if (iscsi_pdu->payload_len > 0) {
struct ibv_sge *tx_dsg = &tx_desc->tx_sg[1];
tx_dsg->addr = (uintptr_t)tx_desc->data_buff;
tx_dsg->length = iscsi_pdu->payload_len;
tx_dsg->lkey = tx_desc->data_mr->lkey;
tx_desc->num_sge = 2;
hdr->write_va = htobe64((intptr_t)(tx_desc->data_buff + iscsi_pdu->payload_len));
} else {
hdr->write_va = htobe64((intptr_t)(tx_desc->data_buff));
}
return 0;
}