From fefa06811cc7b1c25904579833b4f319cde3ce7f Mon Sep 17 00:00:00 2001 From: Tatyana Nikolova Date: Fri, 22 Dec 2017 09:47:02 -0600 Subject: [PATCH] i40iw: Fix the connection ORD value for loopback The accepting QP ORD value should be adjusted not to exceed the peer QP IRD value (RFC 6581). This is skipped for loopback. After the ORD is validated by i40iw_record_ird_ord(), adjust the ORD value of the loopback accepting QP to prevent overrunning the IRD space of the peer QP. Also move the ORD accounting for 0-byte RDMA read to i40iw_record_ird_ord(). Fixes: f27b4746f378 ("i40iw: add connection management code") Signed-off-by: Tatyana Nikolova Signed-off-by: Shiraz Saleem Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/i40iw/i40iw_cm.c | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c index 341f1380c2a1..97b620382faf 100644 --- a/drivers/infiniband/hw/i40iw/i40iw_cm.c +++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c @@ -128,6 +128,8 @@ static void i40iw_record_ird_ord(struct i40iw_cm_node *cm_node, u32 conn_ird, if (conn_ord > I40IW_MAX_ORD_SIZE) conn_ord = I40IW_MAX_ORD_SIZE; + else if (!conn_ord && cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO) + conn_ord = 1; cm_node->ird_size = conn_ird; cm_node->ord_size = conn_ord; @@ -2874,15 +2876,13 @@ static struct i40iw_cm_listener *i40iw_make_listen_node( * i40iw_create_cm_node - make a connection node with params * @cm_core: cm's core * @iwdev: iwarp device structure - * @private_data_len: len to provate data for mpa request - * @private_data: pointer to private data for connection + * @conn_param: upper layer connection parameters * @cm_info: quad info for connection */ static struct i40iw_cm_node *i40iw_create_cm_node( struct i40iw_cm_core *cm_core, struct i40iw_device *iwdev, - u16 private_data_len, - void *private_data, + struct iw_cm_conn_param *conn_param, struct i40iw_cm_info *cm_info) { struct i40iw_cm_node *cm_node; @@ -2890,6 +2890,9 @@ static struct i40iw_cm_node *i40iw_create_cm_node( struct i40iw_cm_node *loopback_remotenode; struct i40iw_cm_info loopback_cm_info; + u16 private_data_len = conn_param->private_data_len; + const void *private_data = conn_param->private_data; + /* create a CM connection node */ cm_node = i40iw_make_cm_node(cm_core, iwdev, cm_info, NULL); if (!cm_node) @@ -2898,6 +2901,8 @@ static struct i40iw_cm_node *i40iw_create_cm_node( cm_node->tcp_cntxt.client = 1; cm_node->tcp_cntxt.rcv_wscale = I40IW_CM_DEFAULT_RCV_WND_SCALE; + i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); + if (!memcmp(cm_info->loc_addr, cm_info->rem_addr, sizeof(cm_info->loc_addr))) { loopback_remotelistener = i40iw_find_listener( cm_core, @@ -2931,6 +2936,10 @@ static struct i40iw_cm_node *i40iw_create_cm_node( private_data_len); loopback_remotenode->pdata.size = private_data_len; + if (loopback_remotenode->ord_size > cm_node->ird_size) + loopback_remotenode->ord_size = + cm_node->ird_size; + cm_node->state = I40IW_CM_STATE_OFFLOADED; cm_node->tcp_cntxt.rcv_nxt = loopback_remotenode->tcp_cntxt.loc_seq_num; @@ -3809,9 +3818,7 @@ int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) __func__, cm_id->tos, cm_info.user_pri); cm_id->add_ref(cm_id); cm_node = i40iw_create_cm_node(&iwdev->cm_core, iwdev, - conn_param->private_data_len, - (void *)conn_param->private_data, - &cm_info); + conn_param, &cm_info); if (IS_ERR(cm_node)) { ret = PTR_ERR(cm_node); @@ -3843,11 +3850,6 @@ int i40iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) } cm_node->apbvt_set = true; - i40iw_record_ird_ord(cm_node, conn_param->ird, conn_param->ord); - if (cm_node->send_rdma0_op == SEND_RDMA_READ_ZERO && - !cm_node->ord_size) - cm_node->ord_size = 1; - iwqp->cm_node = cm_node; cm_node->iwqp = iwqp; iwqp->cm_id = cm_id; -- GitLab