[PATCH v2 2/2] app/testpmd: improve handling of multiprocess

[Marcin Kerlin <marcinx.kerlin@intel.com>]

Added lookup for pool name because secondary process should attach to
mempool created by primary process rather than create new one.

Added function free_shared_dev_data() used at the exit of the testpmd.
This causes detach devices data from array rte_eth_dev_data[] shared
between all processes. This allows to have a up-to-date list of devices
data and run again secondary application with the same name.

Signed-off-by: Marcin Kerlin <marcinx.kerlin@intel.com>
---
 app/test-pmd/testpmd.c | 36 ++++++++++++++++++++++++++++++++++--
 app/test-pmd/testpmd.h |  1 +
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 30749a4..51f6aee 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -452,8 +452,10 @@ mbuf_pool_create(uint16_t mbuf_seg_size, unsigned nb_mbuf,
 			rte_mempool_obj_iter(rte_mp, rte_pktmbuf_init, NULL);
 		} else {
 			/* wrapper to rte_mempool_create() */
-			rte_mp = rte_pktmbuf_pool_create(pool_name, nb_mbuf,
-				mb_mempool_cache, 0, mbuf_seg_size, socket_id);
+			rte_mp = rte_mempool_lookup(pool_name);
+			if (rte_mp == NULL)
+				rte_mp = rte_pktmbuf_pool_create(pool_name, nb_mbuf,
+						mb_mempool_cache, 0, mbuf_seg_size, socket_id);
 		}
 	}
 
@@ -1609,6 +1611,35 @@ detach_port(uint8_t port_id)
 	return;
 }
 
+void free_shared_dev_data(portid_t pid)
+{
+	portid_t pi;
+
+	if (port_id_is_invalid(pid, ENABLED_WARN))
+		return;
+
+	/* free data only if the secondary process exits */
+	if (rte_eal_process_type() != RTE_PROC_SECONDARY)
+		return;
+
+	printf("Cleaning device data...\n");
+
+	FOREACH_PORT(pi, ports)
+	{
+		if (pid != pi && pid != (portid_t) RTE_PORT_ALL)
+			continue;
+
+		if (!port_is_closed(pi)) {
+			printf("Port %d is not closed now\n", pi);
+			continue;
+		}
+
+		if (rte_eth_dev_release_dev_data(pi) < 0)
+			return;
+	}
+	printf("Done\n");
+}
+
 void
 pmd_test_exit(void)
 {
@@ -1624,6 +1655,7 @@ pmd_test_exit(void)
 			fflush(stdout);
 			stop_port(pt_id);
 			close_port(pt_id);
+			free_shared_dev_data(pt_id);
 		}
 	}
 	printf("\nBye...\n");
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 2b281cc..3915a06 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -553,6 +553,7 @@ void attach_port(char *identifier);
 void detach_port(uint8_t port_id);
 int all_ports_stopped(void);
 int port_is_started(portid_t port_id);
+void free_shared_dev_data(portid_t pid);
 void pmd_test_exit(void);
 void fdir_get_infos(portid_t port_id);
 void fdir_set_flex_mask(portid_t port_id,
-- 
1.9.1