[PATCH v3] net/iavf: fix segfaults when calling API after VF reset failed

[Yiding Zhou]

Some pointers will be set to NULL when iavf_dev_reset() failed,
for example vf->vf_res, vf->vsi_res vf->rss_key and etc.
APIs access these NULL pointers will trigger segfault.

This patch adds closed flag to indicate that the VF is closed,
and rejects API calls in this state to avoid coredump.

Fixes: e74e1bb6280d ("net/iavf: enable port reset")
Cc: stable at dpdk.org

Signed-off-by: Yiding Zhou <yidingx.zhou at intel.com>
---
 drivers/net/iavf/iavf.h        |  1 +
 drivers/net/iavf/iavf_ethdev.c | 57 +++++++++++++++++++++++++++++++---
 drivers/net/iavf/iavf_rxtx.c   | 10 ++++++
 drivers/net/iavf/iavf_vchnl.c  | 17 ++++++++++
 4 files changed, 81 insertions(+), 4 deletions(-)

diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h
index dd83567e59..819510649a 100644
--- a/drivers/net/iavf/iavf.h
+++ b/drivers/net/iavf/iavf.h
@@ -312,6 +312,7 @@ struct iavf_adapter {
 	bool tx_vec_allowed;
 	uint32_t ptype_tbl[IAVF_MAX_PKT_TYPE] __rte_cache_min_aligned;
 	bool stopped;
+	bool closed;
 	uint16_t fdir_ref_cnt;
 	struct iavf_devargs devargs;
 	uint64_t phc_time;
diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 82672841f4..198d8299af 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -234,9 +234,15 @@ static const struct eth_dev_ops iavf_eth_dev_ops = {
 };
 
 static int
-iavf_tm_ops_get(struct rte_eth_dev *dev __rte_unused,
+iavf_tm_ops_get(struct rte_eth_dev *dev,
 			void *arg)
 {
+	struct iavf_adapter *adapter =
+		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
+
+	if (adapter->closed)
+		return -EIO;
+
 	if (!arg)
 		return -EINVAL;
 
@@ -347,6 +353,9 @@ iavf_set_mc_addr_list(struct rte_eth_dev *dev,
 		return -EINVAL;
 	}
 
+	if (adapter->closed)
+		return -EIO;
+
 	/* flush previous addresses */
 	err = iavf_add_del_mc_addr_list(adapter, vf->mc_addrs, vf->mc_addrs_num,
 					false);
@@ -618,6 +627,9 @@ iavf_dev_configure(struct rte_eth_dev *dev)
 		dev->data->nb_tx_queues);
 	int ret;
 
+	if (ad->closed)
+		return -EIO;
+
 	ad->rx_bulk_alloc_allowed = true;
 	/* Initialize to TRUE. If any of Rx queues doesn't meet the
 	 * vector Rx/Tx preconditions, it will be reset.
@@ -950,6 +962,9 @@ iavf_dev_start(struct rte_eth_dev *dev)
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (adapter->closed)
+		return -1;
+
 	adapter->stopped = 0;
 
 	vf->max_pkt_len = dev->data->mtu + IAVF_ETH_OVERHEAD;
@@ -1046,6 +1061,9 @@ iavf_dev_stop(struct rte_eth_dev *dev)
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (adapter->closed)
+		return -1;
+
 	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) &&
 	    dev->data->dev_conf.intr_conf.rxq != 0)
 		rte_intr_disable(intr_handle);
@@ -1083,6 +1101,9 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 	struct iavf_info *vf = &adapter->vf;
 
+	if (adapter->closed)
+		return -EIO;
+
 	dev_info->max_rx_queues = IAVF_MAX_NUM_QUEUES_LV;
 	dev_info->max_tx_queues = IAVF_MAX_NUM_QUEUES_LV;
 	dev_info->min_rx_bufsize = IAVF_BUF_SIZE_MIN;
@@ -1326,6 +1347,9 @@ iavf_dev_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN_V2) {
 		err = iavf_add_del_vlan_v2(adapter, vlan_id, on);
 		if (err)
@@ -1402,6 +1426,9 @@ iavf_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 	struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN_V2)
 		return iavf_dev_vlan_offload_set_v2(dev, mask);
 
@@ -1434,6 +1461,9 @@ iavf_dev_rss_reta_update(struct rte_eth_dev *dev,
 	uint16_t i, idx, shift;
 	int ret;
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
 		return -ENOTSUP;
 
@@ -1479,6 +1509,9 @@ iavf_dev_rss_reta_query(struct rte_eth_dev *dev,
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
 	uint16_t i, idx, shift;
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
 		return -ENOTSUP;
 
@@ -1532,6 +1565,9 @@ iavf_dev_rss_hash_update(struct rte_eth_dev *dev,
 
 	adapter->dev_data->dev_conf.rx_adv_conf.rss_conf = *rss_conf;
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
 		return -ENOTSUP;
 
@@ -1585,6 +1621,9 @@ iavf_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
 
+	if (adapter->closed)
+		return -EIO;
+
 	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF))
 		return -ENOTSUP;
 
@@ -1832,6 +1871,9 @@ iavf_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
 	uint16_t msix_intr;
 
+	if (adapter->closed)
+		return -EIO;
+
 	msix_intr = rte_intr_vec_list_index_get(pci_dev->intr_handle,
 						       queue_id);
 	if (msix_intr == IAVF_MISC_VEC_ID) {
@@ -2489,8 +2531,11 @@ static int
 iavf_dev_flow_ops_get(struct rte_eth_dev *dev,
 		      const struct rte_flow_ops **ops)
 {
-	if (!dev)
-		return -EINVAL;
+	struct iavf_adapter *adapter =
+		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
+
+	if (adapter->closed)
+		return -EIO;
 
 	*ops = &iavf_flow_ops;
 	return 0;
@@ -2631,7 +2676,7 @@ iavf_dev_init(struct rte_eth_dev *eth_dev)
 
 	/* Start device watchdog */
 	iavf_dev_watchdog_enable(adapter);
-
+	adapter->closed = false;
 
 	return 0;
 
@@ -2659,7 +2704,11 @@ iavf_dev_close(struct rte_eth_dev *dev)
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return 0;
 
+	if (adapter->closed)
+		return 0;
+
 	ret = iavf_dev_stop(dev);
+	adapter->closed = true;
 
 	iavf_flow_flush(dev, NULL);
 	iavf_flow_uninit(adapter);
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index d3b1a58b27..73e4960257 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -558,6 +558,9 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (ad->closed)
+		return -EIO;
+
 	offloads = rx_conf->offloads | dev->data->dev_conf.rxmode.offloads;
 
 	if (nb_desc % IAVF_ALIGN_RING_DESC != 0 ||
@@ -719,6 +722,9 @@ iavf_dev_tx_queue_setup(struct rte_eth_dev *dev,
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (adapter->closed)
+		return -EIO;
+
 	offloads = tx_conf->offloads | dev->data->dev_conf.txmode.offloads;
 
 	if (nb_desc % IAVF_ALIGN_RING_DESC != 0 ||
@@ -2843,6 +2849,10 @@ iavf_prep_pkts(__rte_unused void *tx_queue, struct rte_mbuf **tx_pkts,
 	struct iavf_tx_queue *txq = tx_queue;
 	struct rte_eth_dev *dev = &rte_eth_devices[txq->port_id];
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+	struct iavf_adapter *adapter = IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
+
+	if (adapter->closed)
+		return 0;
 
 	for (i = 0; i < nb_pkts; i++) {
 		m = tx_pkts[i];
diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index b654433135..0520b1045f 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -265,6 +265,11 @@ iavf_handle_pf_event_msg(struct rte_eth_dev *dev, uint8_t *msg,
 	struct virtchnl_pf_event *pf_msg =
 			(struct virtchnl_pf_event *)msg;
 
+	if (adapter->closed) {
+		PMD_DRV_LOG(DEBUG, "Port closed");
+		return;
+	}
+
 	if (msglen < sizeof(struct virtchnl_pf_event)) {
 		PMD_DRV_LOG(DEBUG, "Error event");
 		return;
@@ -778,6 +783,9 @@ iavf_switch_queue(struct iavf_adapter *adapter, uint16_t qid,
 	struct iavf_cmd_info args;
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	memset(&queue_select, 0, sizeof(queue_select));
 	queue_select.vsi_id = vf->vsi_res->vsi_id;
 	if (rx)
@@ -1247,6 +1255,9 @@ iavf_query_stats(struct iavf_adapter *adapter,
 	struct iavf_cmd_info args;
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	memset(&q_stats, 0, sizeof(q_stats));
 	q_stats.vsi_id = vf->vsi_res->vsi_id;
 	args.ops = VIRTCHNL_OP_GET_STATS;
@@ -1275,6 +1286,9 @@ iavf_config_promisc(struct iavf_adapter *adapter,
 	struct iavf_cmd_info args;
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	promisc.flags = 0;
 	promisc.vsi_id = vf->vsi_res->vsi_id;
 
@@ -1318,6 +1332,9 @@ iavf_add_del_eth_addr(struct iavf_adapter *adapter, struct rte_ether_addr *addr,
 	struct iavf_cmd_info args;
 	int err;
 
+	if (adapter->closed)
+		return -EIO;
+
 	list = (struct virtchnl_ether_addr_list *)cmd_buffer;
 	list->vsi_id = vf->vsi_res->vsi_id;
 	list->num_elements = 1;
-- 
2.25.1