[PATCH v2 28/61] net/ixgbe: use kvargs numeric helpers

[Stephen Hemminger <stephen@networkplumber.org>]

devarg_handle_int() truncates the strtoul() result into a uint16_t and
then infers overflow from the truncated value being USHRT_MAX, so a
value such as "65536" is silently accepted as zero. It also never
checked the end pointer, and read errno without clearing it first.

fiber_sdp3_no_tx_disable and pflink_fullchk are booleans, so make the
fields bool and parse them with rte_kvargs_handle_bool() straight into
the adapter, which also removes the temporary and the "== 1" dance. A
bare key now enables the option, and the usual spellings are accepted.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/intel/ixgbe/ixgbe_ethdev.c | 40 ++++++--------------------
 drivers/net/intel/ixgbe/ixgbe_ethdev.h |  4 +--
 2 files changed, 11 insertions(+), 33 deletions(-)

diff --git a/drivers/net/intel/ixgbe/ixgbe_ethdev.c b/drivers/net/intel/ixgbe/ixgbe_ethdev.c
index 284df77023..e05c9a8d1f 100644
--- a/drivers/net/intel/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/intel/ixgbe/ixgbe_ethdev.c
@@ -353,8 +353,6 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
 static int ixgbe_filter_restore(struct rte_eth_dev *dev);
 static void ixgbe_l2_tunnel_conf(struct rte_eth_dev *dev);
 static int ixgbe_wait_for_link_up(struct ixgbe_hw *hw);
-static int devarg_handle_int(__rte_unused const char *key, const char *value,
-			     void *extra_args);
 
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
@@ -989,7 +987,6 @@ ixgbe_parse_devargs(struct ixgbe_adapter *adapter,
 		      struct rte_devargs *devargs)
 {
 	struct rte_kvargs *kvlist;
-	uint16_t sdp3_no_tx_disable;
 	enum rte_eth_fdir_pballoc_type pballoc;
 	int ret = 0;
 
@@ -1000,11 +997,10 @@ ixgbe_parse_devargs(struct ixgbe_adapter *adapter,
 	if (kvlist == NULL)
 		return 0;
 
-	if (rte_kvargs_count(kvlist, IXGBE_DEVARG_FIBER_SDP3_NOT_TX_DISABLE) == 1 &&
-	    rte_kvargs_process(kvlist, IXGBE_DEVARG_FIBER_SDP3_NOT_TX_DISABLE,
-			       devarg_handle_int, &sdp3_no_tx_disable) == 0 &&
-	    sdp3_no_tx_disable == 1)
-		adapter->sdp3_no_tx_disable = 1;
+	if (rte_kvargs_count(kvlist, IXGBE_DEVARG_FIBER_SDP3_NOT_TX_DISABLE) == 1)
+		(void)rte_kvargs_process_opt(kvlist, IXGBE_DEVARG_FIBER_SDP3_NOT_TX_DISABLE,
+					     rte_kvargs_handle_bool,
+					     &adapter->sdp3_no_tx_disable);
 
 	if (rte_kvargs_count(kvlist, IXGBE_DEVARG_FDIR_BUFFER_SIZE) != 0) {
 		if (rte_kvargs_process(kvlist, IXGBE_DEVARG_FDIR_BUFFER_SIZE,
@@ -1499,28 +1495,11 @@ generate_random_mac_addr(struct rte_ether_addr *mac_addr)
 	memcpy(&mac_addr->addr_bytes[3], &random, 3);
 }
 
-static int
-devarg_handle_int(__rte_unused const char *key, const char *value,
-		  void *extra_args)
-{
-	uint16_t *n = extra_args;
-
-	if (value == NULL || extra_args == NULL)
-		return -EINVAL;
-
-	*n = (uint16_t)strtoul(value, NULL, 0);
-	if (*n == USHRT_MAX && errno == ERANGE)
-		return -1;
-
-	return 0;
-}
-
 static void
 ixgbevf_parse_devargs(struct ixgbe_adapter *adapter,
 		      struct rte_devargs *devargs)
 {
 	struct rte_kvargs *kvlist;
-	uint16_t pflink_fullchk;
 
 	if (devargs == NULL)
 		return;
@@ -1529,11 +1508,10 @@ ixgbevf_parse_devargs(struct ixgbe_adapter *adapter,
 	if (kvlist == NULL)
 		return;
 
-	if (rte_kvargs_count(kvlist, IXGBEVF_DEVARG_PFLINK_FULLCHK) == 1 &&
-	    rte_kvargs_process(kvlist, IXGBEVF_DEVARG_PFLINK_FULLCHK,
-			       devarg_handle_int, &pflink_fullchk) == 0 &&
-	    pflink_fullchk == 1)
-		adapter->pflink_fullchk = 1;
+	if (rte_kvargs_count(kvlist, IXGBEVF_DEVARG_PFLINK_FULLCHK) == 1)
+		(void)rte_kvargs_process_opt(kvlist, IXGBEVF_DEVARG_PFLINK_FULLCHK,
+					     rte_kvargs_handle_bool,
+					     &adapter->pflink_fullchk);
 
 	rte_kvargs_free(kvlist);
 }
@@ -4181,7 +4159,7 @@ ixgbevf_check_link(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
 		*speed = IXGBE_LINK_SPEED_UNKNOWN;
 	}
 
-	if (wait_to_complete == 0 && adapter->pflink_fullchk == 0) {
+	if (wait_to_complete == 0 && !adapter->pflink_fullchk) {
 		if (*speed == IXGBE_LINK_SPEED_UNKNOWN)
 			mac->get_link_status = true;
 		else
diff --git a/drivers/net/intel/ixgbe/ixgbe_ethdev.h b/drivers/net/intel/ixgbe/ixgbe_ethdev.h
index 0efef29a5d..fff9a07943 100644
--- a/drivers/net/intel/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/intel/ixgbe/ixgbe_ethdev.h
@@ -490,13 +490,13 @@ struct ixgbe_adapter {
 	uint8_t rss_reta_updated;
 
 	/* Used for limiting SDP3 TX_DISABLE checks */
-	uint8_t sdp3_no_tx_disable;
+	bool sdp3_no_tx_disable;
 	uint16_t max_vfs;
 
 	/* Used for VF link sync with PF's physical and logical (by checking
 	 * mailbox status) link status.
 	 */
-	uint8_t pflink_fullchk;
+	bool pflink_fullchk;
 	uint8_t mac_ctrl_frame_fwd;
 	RTE_ATOMIC(bool) link_thread_running;
 	rte_thread_t link_thread_tid;
-- 
2.53.0