[PATCH 14/23] examples/ptpclient: fix shadow variable warnings

[Stephen Hemminger]

Rename function parameters that shadow global variables.
In port_init() rename mbuf_pool to mp, and in print_clock_info(),
delta_eval(), parse_sync(), parse_fup(), and parse_drsp()
rename ptp_data to ptp.

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 examples/ptpclient/meson.build |   1 -
 examples/ptpclient/ptpclient.c | 138 ++++++++++++++++-----------------
 2 files changed, 69 insertions(+), 70 deletions(-)

diff --git a/examples/ptpclient/meson.build b/examples/ptpclient/meson.build
index 2e9b7625fc..47d091ea21 100644
--- a/examples/ptpclient/meson.build
+++ b/examples/ptpclient/meson.build
@@ -10,4 +10,3 @@ allow_experimental_apis = true
 sources = files(
         'ptpclient.c',
 )
-cflags += no_shadow_cflag
diff --git a/examples/ptpclient/ptpclient.c b/examples/ptpclient/ptpclient.c
index 174ca5dd70..8e1560a3ac 100644
--- a/examples/ptpclient/ptpclient.c
+++ b/examples/ptpclient/ptpclient.c
@@ -173,7 +173,7 @@ ns_to_timeval(int64_t nsec)
  * coming from the mbuf_pool passed as a parameter.
  */
 static inline int
-port_init(uint16_t port, struct rte_mempool *mbuf_pool)
+port_init(uint16_t port, struct rte_mempool *mp)
 {
 	struct rte_eth_dev_info dev_info;
 	struct rte_eth_conf port_conf;
@@ -223,7 +223,7 @@ port_init(uint16_t port, struct rte_mempool *mbuf_pool)
 		rxconf->offloads = port_conf.rxmode.offloads;
 
 		retval = rte_eth_rx_queue_setup(port, q, nb_rxd,
-				rte_eth_dev_socket_id(port), rxconf, mbuf_pool);
+				rte_eth_dev_socket_id(port), rxconf, mp);
 
 		if (retval < 0)
 			return retval;
@@ -266,42 +266,42 @@ port_init(uint16_t port, struct rte_mempool *mbuf_pool)
 }
 
 static void
-print_clock_info(struct ptpv2_time_receiver_ordinary *ptp_data)
+print_clock_info(struct ptpv2_time_receiver_ordinary *ptp)
 {
 	int64_t nsec;
 	struct timespec net_time, sys_time;
 
 	printf("time transmitter clock id: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
-		ptp_data->transmitter_clock_id.id[0],
-		ptp_data->transmitter_clock_id.id[1],
-		ptp_data->transmitter_clock_id.id[2],
-		ptp_data->transmitter_clock_id.id[3],
-		ptp_data->transmitter_clock_id.id[4],
-		ptp_data->transmitter_clock_id.id[5],
-		ptp_data->transmitter_clock_id.id[6],
-		ptp_data->transmitter_clock_id.id[7]);
+		ptp->transmitter_clock_id.id[0],
+		ptp->transmitter_clock_id.id[1],
+		ptp->transmitter_clock_id.id[2],
+		ptp->transmitter_clock_id.id[3],
+		ptp->transmitter_clock_id.id[4],
+		ptp->transmitter_clock_id.id[5],
+		ptp->transmitter_clock_id.id[6],
+		ptp->transmitter_clock_id.id[7]);
 
 	printf("\nT2 - time receiver clock.  %lds %ldns",
-			(ptp_data->tstamp2.tv_sec),
-			(ptp_data->tstamp2.tv_nsec));
+			(ptp->tstamp2.tv_sec),
+			(ptp->tstamp2.tv_nsec));
 
 	printf("\nT1 - time transmitter clock.  %lds %ldns ",
-			ptp_data->tstamp1.tv_sec,
-			(ptp_data->tstamp1.tv_nsec));
+			ptp->tstamp1.tv_sec,
+			(ptp->tstamp1.tv_nsec));
 
 	printf("\nT3 - time receiver clock.  %lds %ldns",
-			ptp_data->tstamp3.tv_sec,
-			(ptp_data->tstamp3.tv_nsec));
+			ptp->tstamp3.tv_sec,
+			(ptp->tstamp3.tv_nsec));
 
 	printf("\nT4 - time transmitter clock.  %lds %ldns\n",
-			ptp_data->tstamp4.tv_sec,
-			(ptp_data->tstamp4.tv_nsec));
+			ptp->tstamp4.tv_sec,
+			(ptp->tstamp4.tv_nsec));
 
 	printf("\nDelta between transmitter and receiver clocks:%"PRId64"ns\n",
-		ptp_data->delta);
+		ptp->delta);
 
 	clock_gettime(CLOCK_REALTIME, &sys_time);
-	rte_eth_timesync_read_time(ptp_data->current_ptp_port,
+	rte_eth_timesync_read_time(ptp->current_ptp_port,
 					&net_time);
 
 	time_t ts = net_time.tv_sec;
@@ -313,14 +313,14 @@ print_clock_info(struct ptpv2_time_receiver_ordinary *ptp_data)
 
 	nsec = (int64_t)timespec64_to_ns(&net_time) -
 		(int64_t)timespec64_to_ns(&sys_time);
-	ptp_data->new_adj = ns_to_timeval(nsec);
+	ptp->new_adj = ns_to_timeval(nsec);
 
-	gettimeofday(&ptp_data->new_adj, NULL);
+	gettimeofday(&ptp->new_adj, NULL);
 
-	time_t tp = ptp_data->new_adj.tv_sec;
+	time_t tp = ptp->new_adj.tv_sec;
 
 	printf("\nCurrent SYS Time: %.24s %.6ld ns",
-		ctime(&tp), ptp_data->new_adj.tv_usec);
+		ctime(&tp), ptp->new_adj.tv_usec);
 
 	printf("\nDelta between PTP and Linux Kernel time:%"PRId64"ns\n",
 		nsec);
@@ -332,7 +332,7 @@ print_clock_info(struct ptpv2_time_receiver_ordinary *ptp_data)
 }
 
 static int64_t
-delta_eval(struct ptpv2_time_receiver_ordinary *ptp_data)
+delta_eval(struct ptpv2_time_receiver_ordinary *ptp)
 {
 	int64_t delta;
 	uint64_t t1 = 0;
@@ -340,10 +340,10 @@ delta_eval(struct ptpv2_time_receiver_ordinary *ptp_data)
 	uint64_t t3 = 0;
 	uint64_t t4 = 0;
 
-	t1 = timespec64_to_ns(&ptp_data->tstamp1);
-	t2 = timespec64_to_ns(&ptp_data->tstamp2);
-	t3 = timespec64_to_ns(&ptp_data->tstamp3);
-	t4 = timespec64_to_ns(&ptp_data->tstamp4);
+	t1 = timespec64_to_ns(&ptp->tstamp1);
+	t2 = timespec64_to_ns(&ptp->tstamp2);
+	t3 = timespec64_to_ns(&ptp->tstamp3);
+	t4 = timespec64_to_ns(&ptp->tstamp4);
 
 	delta = -((int64_t)((t2 - t1) - (t4 - t3))) / 2;
 
@@ -354,26 +354,26 @@ delta_eval(struct ptpv2_time_receiver_ordinary *ptp_data)
  * Parse the PTP SYNC message.
  */
 static void
-parse_sync(struct ptpv2_time_receiver_ordinary *ptp_data, uint16_t rx_tstamp_idx)
+parse_sync(struct ptpv2_time_receiver_ordinary *ptp, uint16_t rx_tstamp_idx)
 {
 	struct ptp_header *ptp_hdr;
 
-	ptp_hdr = rte_pktmbuf_mtod_offset(ptp_data->m, struct ptp_header *,
+	ptp_hdr = rte_pktmbuf_mtod_offset(ptp->m, struct ptp_header *,
 					  sizeof(struct rte_ether_hdr));
-	ptp_data->seqID_SYNC = rte_be_to_cpu_16(ptp_hdr->seq_id);
+	ptp->seqID_SYNC = rte_be_to_cpu_16(ptp_hdr->seq_id);
 
-	if (ptp_data->ptpset == 0) {
-		ptp_data->transmitter_clock_id = ptp_hdr->source_port_id.clock_id;
-		ptp_data->ptpset = 1;
+	if (ptp->ptpset == 0) {
+		ptp->transmitter_clock_id = ptp_hdr->source_port_id.clock_id;
+		ptp->ptpset = 1;
 	}
 
-	if (memcmp(&ptp_data->transmitter_clock_id,
+	if (memcmp(&ptp->transmitter_clock_id,
 			&ptp_hdr->source_port_id.clock_id,
 			sizeof(struct clock_id)) == 0) {
 
-		if (ptp_data->ptpset == 1)
-			rte_eth_timesync_read_rx_timestamp(ptp_data->portid,
-					&ptp_data->tstamp2, rx_tstamp_idx);
+		if (ptp->ptpset == 1)
+			rte_eth_timesync_read_rx_timestamp(ptp->portid,
+					&ptp->tstamp2, rx_tstamp_idx);
 	}
 
 }
@@ -382,7 +382,7 @@ parse_sync(struct ptpv2_time_receiver_ordinary *ptp_data, uint16_t rx_tstamp_idx
  * Parse the PTP FOLLOWUP message and send DELAY_REQ to the main clock.
  */
 static void
-parse_fup(struct ptpv2_time_receiver_ordinary *ptp_data)
+parse_fup(struct ptpv2_time_receiver_ordinary *ptp)
 {
 	struct rte_ether_hdr *eth_hdr;
 	struct rte_ether_addr eth_addr;
@@ -395,32 +395,32 @@ parse_fup(struct ptpv2_time_receiver_ordinary *ptp_data)
 	struct rte_ether_addr eth_multicast = ether_multicast;
 	size_t pkt_size;
 	int wait_us;
-	struct rte_mbuf *m = ptp_data->m;
+	struct rte_mbuf *m = ptp->m;
 	int ret;
 
 	eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
 	ptp_hdr = rte_pktmbuf_mtod_offset(m, struct ptp_header *,
 					  sizeof(struct rte_ether_hdr));
-	if (memcmp(&ptp_data->transmitter_clock_id,
+	if (memcmp(&ptp->transmitter_clock_id,
 			&ptp_hdr->source_port_id.clock_id,
 			sizeof(struct clock_id)) != 0)
 		return;
 
-	ptp_data->seqID_FOLLOWUP = rte_be_to_cpu_16(ptp_hdr->seq_id);
+	ptp->seqID_FOLLOWUP = rte_be_to_cpu_16(ptp_hdr->seq_id);
 	ptp_msg = rte_pktmbuf_mtod_offset(m, struct ptp_message *,
 					  sizeof(struct rte_ether_hdr));
 
 	origin_tstamp = &ptp_msg->follow_up.precise_origin_tstamp;
-	ptp_data->tstamp1.tv_nsec = ntohl(origin_tstamp->ns);
-	ptp_data->tstamp1.tv_sec =
+	ptp->tstamp1.tv_nsec = ntohl(origin_tstamp->ns);
+	ptp->tstamp1.tv_sec =
 		((uint64_t)ntohl(origin_tstamp->sec_lsb)) |
 		(((uint64_t)ntohs(origin_tstamp->sec_msb)) << 32);
 
-	if (ptp_data->seqID_FOLLOWUP == ptp_data->seqID_SYNC) {
-		ret = rte_eth_macaddr_get(ptp_data->portid, &eth_addr);
+	if (ptp->seqID_FOLLOWUP == ptp->seqID_SYNC) {
+		ret = rte_eth_macaddr_get(ptp->portid, &eth_addr);
 		if (ret != 0) {
 			printf("\nCore %u: port %u failed to get MAC address: %s\n",
-				rte_lcore_id(), ptp_data->portid,
+				rte_lcore_id(), ptp->portid,
 				rte_strerror(-ret));
 			return;
 		}
@@ -446,7 +446,7 @@ parse_fup(struct ptpv2_time_receiver_ordinary *ptp_data)
 			struct delay_req_msg *, sizeof(struct
 			rte_ether_hdr));
 
-		req_msg->hdr.seq_id = htons(ptp_data->seqID_SYNC);
+		req_msg->hdr.seq_id = htons(ptp->seqID_SYNC);
 		req_msg->hdr.msg_type = DELAY_REQ;
 		req_msg->hdr.ver = 2;
 		req_msg->hdr.control = 1;
@@ -468,25 +468,25 @@ parse_fup(struct ptpv2_time_receiver_ordinary *ptp_data)
 		client_clkid->id[6] = eth_hdr->src_addr.addr_bytes[4];
 		client_clkid->id[7] = eth_hdr->src_addr.addr_bytes[5];
 
-		ptp_data->client_clock_id = *client_clkid;
+		ptp->client_clock_id = *client_clkid;
 
 		/* Enable flag for hardware timestamping. */
 		created_pkt->ol_flags |= RTE_MBUF_F_TX_IEEE1588_TMST;
 
 		/*Read value from NIC to prevent latching with old value. */
-		rte_eth_timesync_read_tx_timestamp(ptp_data->portid,
-				&ptp_data->tstamp3);
+		rte_eth_timesync_read_tx_timestamp(ptp->portid,
+				&ptp->tstamp3);
 
 		/* Transmit the packet. */
-		rte_eth_tx_burst(ptp_data->portid, 0, &created_pkt, 1);
+		rte_eth_tx_burst(ptp->portid, 0, &created_pkt, 1);
 
 		wait_us = 0;
-		ptp_data->tstamp3.tv_nsec = 0;
-		ptp_data->tstamp3.tv_sec = 0;
+		ptp->tstamp3.tv_nsec = 0;
+		ptp->tstamp3.tv_sec = 0;
 
 		/* Wait at least 1 us to read TX timestamp. */
-		while ((rte_eth_timesync_read_tx_timestamp(ptp_data->portid,
-				&ptp_data->tstamp3) < 0) && (wait_us < 1000)) {
+		while ((rte_eth_timesync_read_tx_timestamp(ptp->portid,
+				&ptp->tstamp3) < 0) && (wait_us < 1000)) {
 			rte_delay_us(1);
 			wait_us++;
 		}
@@ -530,9 +530,9 @@ update_kernel_time(void)
  * Parse the DELAY_RESP message.
  */
 static void
-parse_drsp(struct ptpv2_time_receiver_ordinary *ptp_data)
+parse_drsp(struct ptpv2_time_receiver_ordinary *ptp)
 {
-	struct rte_mbuf *m = ptp_data->m;
+	struct rte_mbuf *m = ptp->m;
 	struct ptp_message *ptp_msg;
 	struct tstamp *rx_tstamp;
 	uint16_t seq_id;
@@ -540,26 +540,26 @@ parse_drsp(struct ptpv2_time_receiver_ordinary *ptp_data)
 	ptp_msg = rte_pktmbuf_mtod_offset(m, struct ptp_message *,
 					  sizeof(struct rte_ether_hdr));
 	seq_id = rte_be_to_cpu_16(ptp_msg->delay_resp.hdr.seq_id);
-	if (memcmp(&ptp_data->client_clock_id,
+	if (memcmp(&ptp->client_clock_id,
 		   &ptp_msg->delay_resp.req_port_id.clock_id,
 		   sizeof(struct clock_id)) == 0) {
-		if (seq_id == ptp_data->seqID_FOLLOWUP) {
+		if (seq_id == ptp->seqID_FOLLOWUP) {
 			rx_tstamp = &ptp_msg->delay_resp.rx_tstamp;
-			ptp_data->tstamp4.tv_nsec = ntohl(rx_tstamp->ns);
-			ptp_data->tstamp4.tv_sec =
+			ptp->tstamp4.tv_nsec = ntohl(rx_tstamp->ns);
+			ptp->tstamp4.tv_sec =
 				((uint64_t)ntohl(rx_tstamp->sec_lsb)) |
 				(((uint64_t)ntohs(rx_tstamp->sec_msb)) << 32);
 
 			/* Evaluate the delta for adjustment. */
-			ptp_data->delta = delta_eval(ptp_data);
+			ptp->delta = delta_eval(ptp);
 
-			rte_eth_timesync_adjust_time(ptp_data->portid,
-							ptp_data->delta);
+			rte_eth_timesync_adjust_time(ptp->portid,
+							ptp->delta);
 
-			ptp_data->current_ptp_port = ptp_data->portid;
+			ptp->current_ptp_port = ptp->portid;
 
 			/* Update kernel time if enabled in app parameters. */
-			if (ptp_data->kernel_time_set == 1)
+			if (ptp->kernel_time_set == 1)
 				update_kernel_time();
 
 
-- 
2.53.0