[dpdk-dev] [PATCH 04/18] net/bonding: check status of getting link info

[Andrew Rybchenko <arybchenko@solarflare.com>]

From: Igor Romanov <igor.romanov@oktetlabs.ru>

The return value of rte_eth_link_get() and rte_eth_link_get_nowait()
was changed from void to int. Update the usage of the functions
according to the new return type.

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 drivers/net/bonding/rte_eth_bond_8023ad.c | 24 +++++++---
 drivers/net/bonding/rte_eth_bond_api.c    | 19 ++++++--
 drivers/net/bonding/rte_eth_bond_pmd.c    | 55 ++++++++++++++++++++---
 3 files changed, 83 insertions(+), 15 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_8023ad.c b/drivers/net/bonding/rte_eth_bond_8023ad.c
index e64fb6e41..e50d946eb 100644
--- a/drivers/net/bonding/rte_eth_bond_8023ad.c
+++ b/drivers/net/bonding/rte_eth_bond_8023ad.c
@@ -675,6 +675,7 @@ selection_logic(struct bond_dev_private *internals, uint16_t slave_id)
 	uint16_t default_slave = 0;
 	uint8_t mode_count_id, mode_band_id;
 	struct rte_eth_link link_info;
+	int ret;
 
 	slaves = internals->active_slaves;
 	slaves_count = internals->active_slave_count;
@@ -687,8 +688,14 @@ selection_logic(struct bond_dev_private *internals, uint16_t slave_id)
 		if (agg->aggregator_port_id != slaves[i])
 			continue;
 
+		ret = rte_eth_link_get_nowait(slaves[i], &link_info);
+		if (ret < 0) {
+			RTE_BOND_LOG(ERR,
+				"Slave (port %u) link get failed: %s\n",
+				slaves[i], rte_strerror(-ret));
+			continue;
+		}
 		agg_count[agg->aggregator_port_id] += 1;
-		rte_eth_link_get_nowait(slaves[i], &link_info);
 		agg_bandwidth[agg->aggregator_port_id] += link_info.link_speed;
 
 		/* Actors system ID is not checked since all slave device have the same
@@ -821,18 +828,25 @@ bond_mode_8023ad_periodic_cb(void *arg)
 	/* Update link status on each port */
 	for (i = 0; i < internals->active_slave_count; i++) {
 		uint16_t key;
+		int ret;
 
 		slave_id = internals->active_slaves[i];
-		rte_eth_link_get_nowait(slave_id, &link_info);
-		rte_eth_macaddr_get(slave_id, &slave_addr);
+		ret = rte_eth_link_get_nowait(slave_id, &link_info);
+		if (ret < 0) {
+			RTE_BOND_LOG(ERR,
+				"Slave (port %u) link get failed: %s\n",
+				slave_id, rte_strerror(-ret));
+		}
 
-		if (link_info.link_status != 0) {
+		if (ret >= 0 && link_info.link_status != 0) {
 			key = link_speed_key(link_info.link_speed) << 1;
 			if (link_info.link_duplex == ETH_LINK_FULL_DUPLEX)
 				key |= BOND_LINK_FULL_DUPLEX_KEY;
-		} else
+		} else {
 			key = 0;
+		}
 
+		rte_eth_macaddr_get(slave_id, &slave_addr);
 		port = &bond_mode_8023ad_ports[slave_id];
 
 		key = rte_cpu_to_be_16(key);
diff --git a/drivers/net/bonding/rte_eth_bond_api.c b/drivers/net/bonding/rte_eth_bond_api.c
index e2e27e9f2..2cef88720 100644
--- a/drivers/net/bonding/rte_eth_bond_api.c
+++ b/drivers/net/bonding/rte_eth_bond_api.c
@@ -557,9 +557,6 @@ __eth_bond_slave_add_lock_free(uint16_t bonded_port_id, uint16_t slave_port_id)
 		}
 	}
 
-	/* Add slave details to bonded device */
-	slave_eth_dev->data->dev_flags |= RTE_ETH_DEV_BONDED_SLAVE;
-
 	/* Update all slave devices MACs */
 	mac_address_slaves_update(bonded_eth_dev);
 
@@ -571,7 +568,18 @@ __eth_bond_slave_add_lock_free(uint16_t bonded_port_id, uint16_t slave_port_id)
 	/* If bonded device is started then we can add the slave to our active
 	 * slave array */
 	if (bonded_eth_dev->data->dev_started) {
-		rte_eth_link_get_nowait(slave_port_id, &link_props);
+		ret = rte_eth_link_get_nowait(slave_port_id, &link_props);
+		if (ret < 0) {
+			rte_eth_dev_callback_unregister(slave_port_id,
+					RTE_ETH_EVENT_INTR_LSC,
+					bond_ethdev_lsc_event_callback,
+					&bonded_eth_dev->data->port_id);
+			internals->slave_count--;
+			RTE_BOND_LOG(ERR,
+				"Slave (port %u) link get failed: %s\n",
+				slave_port_id, rte_strerror(-ret));
+			return -1;
+		}
 
 		 if (link_props.link_status == ETH_LINK_UP) {
 			if (internals->active_slave_count == 0 &&
@@ -581,6 +589,9 @@ __eth_bond_slave_add_lock_free(uint16_t bonded_port_id, uint16_t slave_port_id)
 		}
 	}
 
+	/* Add slave details to bonded device */
+	slave_eth_dev->data->dev_flags |= RTE_ETH_DEV_BONDED_SLAVE;
+
 	slave_vlan_filter_set(bonded_port_id, slave_port_id);
 
 	return 0;
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 9316f93f7..a2d13d95c 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -846,8 +846,14 @@ bandwidth_left(uint16_t port_id, uint64_t load, uint8_t update_idx,
 		struct bwg_slave *bwg_slave)
 {
 	struct rte_eth_link link_status;
+	int ret;
 
-	rte_eth_link_get_nowait(port_id, &link_status);
+	ret = rte_eth_link_get_nowait(port_id, &link_status);
+	if (ret < 0) {
+		RTE_BOND_LOG(ERR, "Slave (port %u) link get failed: %s",
+			     port_id, rte_strerror(-ret));
+		return;
+	}
 	uint64_t link_bwg = link_status.link_speed * 1000000ULL / 8;
 	if (link_bwg == 0)
 		return;
@@ -2363,7 +2369,9 @@ bond_ethdev_link_update(struct rte_eth_dev *ethdev, int wait_to_complete)
 	struct bond_dev_private *bond_ctx;
 	struct rte_eth_link slave_link;
 
+	bool one_link_update_succeeded;
 	uint32_t idx;
+	int ret;
 
 	bond_ctx = ethdev->data->dev_private;
 
@@ -2396,7 +2404,17 @@ bond_ethdev_link_update(struct rte_eth_dev *ethdev, int wait_to_complete)
 		 * greater than this are attempted
 		 */
 		for (idx = 0; idx < bond_ctx->active_slave_count; idx++) {
-			link_update(bond_ctx->active_slaves[idx], &slave_link);
+			ret = link_update(bond_ctx->active_slaves[idx],
+					  &slave_link);
+			if (ret < 0) {
+				ethdev->data->dev_link.link_speed =
+					ETH_SPEED_NUM_NONE;
+				RTE_BOND_LOG(ERR,
+					"Slave (port %u) link get failed: %s",
+					bond_ctx->active_slaves[idx],
+					rte_strerror(-ret));
+				return 0;
+			}
 
 			if (slave_link.link_speed <
 					ethdev->data->dev_link.link_speed)
@@ -2406,7 +2424,13 @@ bond_ethdev_link_update(struct rte_eth_dev *ethdev, int wait_to_complete)
 		break;
 	case BONDING_MODE_ACTIVE_BACKUP:
 		/* Current primary slave */
-		link_update(bond_ctx->current_primary_port, &slave_link);
+		ret = link_update(bond_ctx->current_primary_port, &slave_link);
+		if (ret < 0) {
+			RTE_BOND_LOG(ERR, "Slave (port %u) link get failed: %s",
+				bond_ctx->current_primary_port,
+				rte_strerror(-ret));
+			return 0;
+		}
 
 		ethdev->data->dev_link.link_speed = slave_link.link_speed;
 		break;
@@ -2426,13 +2450,28 @@ bond_ethdev_link_update(struct rte_eth_dev *ethdev, int wait_to_complete)
 		 * of all the slaves
 		 */
 		ethdev->data->dev_link.link_speed = ETH_SPEED_NUM_NONE;
+		one_link_update_succeeded = false;
 
 		for (idx = 0; idx < bond_ctx->active_slave_count; idx++) {
-			link_update(bond_ctx->active_slaves[idx], &slave_link);
+			ret = link_update(bond_ctx->active_slaves[idx],
+					&slave_link);
+			if (ret < 0) {
+				RTE_BOND_LOG(ERR,
+					"Slave (port %u) link get failed: %s",
+					bond_ctx->active_slaves[idx],
+					rte_strerror(-ret));
+				continue;
+			}
 
+			one_link_update_succeeded = true;
 			ethdev->data->dev_link.link_speed +=
 					slave_link.link_speed;
 		}
+
+		if (!one_link_update_succeeded) {
+			RTE_BOND_LOG(ERR, "All slaves link get failed");
+			return 0;
+		}
 	}
 
 
@@ -2734,6 +2773,7 @@ bond_ethdev_lsc_event_callback(uint16_t port_id, enum rte_eth_event_type type,
 	struct bond_dev_private *internals;
 	struct rte_eth_link link;
 	int rc = -1;
+	int ret;
 
 	uint8_t lsc_flag = 0;
 	int valid_slave = 0;
@@ -2774,8 +2814,11 @@ bond_ethdev_lsc_event_callback(uint16_t port_id, enum rte_eth_event_type type,
 	active_pos = find_slave_by_id(internals->active_slaves,
 			internals->active_slave_count, port_id);
 
-	rte_eth_link_get_nowait(port_id, &link);
-	if (link.link_status) {
+	ret = rte_eth_link_get_nowait(port_id, &link);
+	if (ret < 0)
+		RTE_BOND_LOG(ERR, "Slave (port %u) link get failed", port_id);
+
+	if (ret == 0 && link.link_status) {
 		if (active_pos < internals->active_slave_count)
 			goto link_update;
 
-- 
2.17.1