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iser: use login_resp_buf until login is finished

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This commit is to fix compatibility with CHAP.

iSER transport only post `login_resp_buf` (which is larger than `rx_desc`) as
work request (WR) once, but there may be multiple requests and responses during
login phase (e.g. when CHAP is used) and login can't be finished in such cases.

Signed-off-by: wanghonghao <wanghonghao@bytedance.com>
This commit is contained in:
wanghonghao
2019-12-09 22:43:06 +08:00
parent ce09f48f02
commit 2b9b097c35
1 changed files with 22 additions and 22 deletions
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44
lib/iser.c
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@@ -729,15 +729,6 @@ iser_send_control(struct iser_conn *iser_conn, struct iser_pdu *iser_pdu) {
tx_desc->num_sge = 2;
}
if (iser_pdu->iscsi_pdu.response_opcode == ISCSI_PDU_LOGIN_RESPONSE ||
iscsi->session_type == ISCSI_SESSION_DISCOVERY) {
ret = iser_post_recvl(iser_conn);
if (ret) {
iscsi_set_error(iscsi, "Failed Post Recv login");
return -1;
}
}
ret = iser_post_send(iser_conn, tx_desc, true);
if (ret) {
iscsi_set_error(iscsi, "Failed to post send");
@@ -1331,19 +1322,6 @@ iser_rcv_completion(struct iser_rx_desc *rx_desc,
in = iscsi_malloc(iscsi, sizeof(*in));
if ((unsigned char *)rx_desc == iser_conn->login_resp_buf)
if (iscsi->session_type == ISCSI_SESSION_NORMAL) {
if(iser_alloc_rx_descriptors(iser_conn,255)) {
iscsi_set_error(iscsi, "iser_alloc_rx_descriptors Failed\n");
err = -1;
goto error;
}
err = iser_post_recvm(iser_conn, ISER_MIN_POSTED_RX);
if (err) {
err = -1;
goto error;
}
}
in->hdr = (unsigned char*)rx_desc->iscsi_header;
in->data_pos = iscsi_get_pdu_data_size(&in->hdr[0]);
in->data = (unsigned char*)rx_desc->data;
@@ -1401,6 +1379,23 @@ nop_target:
goto error;
}
}
} else if (iscsi->is_loggedin) {
if(iser_alloc_rx_descriptors(iser_conn, 255)) {
iscsi_set_error(iscsi, "iser_alloc_rx_descriptors Failed\n");
err = -1;
goto error;
}
err = iser_post_recvm(iser_conn, ISER_MIN_POSTED_RX);
if (err) {
err = -1;
goto error;
}
} else {
if (iser_post_recvl(iser_conn)) {
iscsi_set_error(iscsi, "Failed Post Recv login");
err = -1;
goto error;
}
}
err = iscsi_process_pdu(iscsi, in);
@@ -1559,6 +1554,11 @@ static int iser_connected_handler(struct rdma_cm_id *cma_id) {
iser_conn->post_recv_buf_count = 0;
iscsi->is_connected = 1;
if (iser_post_recvl(iser_conn)) {
iscsi_set_error(iscsi, "Failed Post Recv login");
return -1;
}
return 0;
}