[dpdk-stable] patch 'app/testpmd: fix synchronic port hotplug' has been queued to stable release 18.02.2

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 18.02.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/16/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 0035d0a222b0ef0227f9be2f4564bfeaa91a8c81 Mon Sep 17 00:00:00 2001
From: Matan Azrad <matan at mellanox.com>
Date: Thu, 3 May 2018 10:31:46 +0000
Subject: [PATCH] app/testpmd: fix synchronic port hotplug

[ upstream commit 03ce2c53a3905b11e54c424ca395ae5bea186cbd ]

When the user uses the synchronic hot-plug commands, attach\detach, in
order to insert\remove a port from the system, the forward ports list
update is missed in the current implementation.

Thus, an invalid port may be used for data-path in case of detach
because the detached port was not removed from the forward port list.

In addition, a new port is not used for data-path in case of attach, as the
default behavior of Testpmd, because the attached port was not inserted
to the forward port list.

Update the forward port list in the above cases to allow the correct
port usage for data-path in the next packet forwarding start.

Fixes: edab33b1c01d ("app/testpmd: support port hotplug")

Signed-off-by: Matan Azrad <matan at mellanox.com>
---
 app/test-pmd/testpmd.c | 29 +++++++++++++++++++++++++++++
 app/test-pmd/testpmd.h |  1 +
 2 files changed, 30 insertions(+)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 8487c99fe..fed7d509f 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -1203,6 +1203,31 @@ launch_packet_forwarding(lcore_function_t *pkt_fwd_on_lcore)
 	}
 }
 
+/*
+ * Update the forward ports list.
+ */
+void
+update_fwd_ports(portid_t new_pid)
+{
+	unsigned int i;
+	unsigned int new_nb_fwd_ports = 0;
+	int move = 0;
+
+	for (i = 0; i < nb_fwd_ports; ++i) {
+		if (port_id_is_invalid(fwd_ports_ids[i], DISABLED_WARN))
+			move = 1;
+		else if (move)
+			fwd_ports_ids[new_nb_fwd_ports++] = fwd_ports_ids[i];
+		else
+			new_nb_fwd_ports++;
+	}
+	if (new_pid < RTE_MAX_ETHPORTS)
+		fwd_ports_ids[new_nb_fwd_ports++] = new_pid;
+
+	nb_fwd_ports = new_nb_fwd_ports;
+	nb_cfg_ports = new_nb_fwd_ports;
+}
+
 /*
  * Launch packet forwarding configuration.
  */
@@ -1879,6 +1904,8 @@ attach_port(char *identifier)
 
 	ports[pi].port_status = RTE_PORT_STOPPED;
 
+	update_fwd_ports(pi);
+
 	printf("Port %d is attached. Now total ports is %d\n", pi, nb_ports);
 	printf("Done\n");
 }
@@ -1905,6 +1932,8 @@ detach_port(portid_t port_id)
 
 	nb_ports = rte_eth_dev_count();
 
+	update_fwd_ports(RTE_MAX_ETHPORTS);
+
 	printf("Port '%s' is detached. Now total ports is %d\n",
 			name, nb_ports);
 	printf("Done\n");
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 956a1bf98..de7b67c7b 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -564,6 +564,7 @@ void fwd_config_setup(void);
 void set_def_fwd_config(void);
 void reconfig(portid_t new_port_id, unsigned socket_id);
 int init_fwd_streams(void);
+void update_fwd_ports(portid_t new_pid);
 
 void set_fwd_eth_peer(portid_t port_id, char *peer_addr);
 
-- 
2.14.2