[PATCH v2] app/test:subprocess synchronization of parameters

[Kaisen You <kaisenx.you@intel.com>]

In meson_test, because the child process does not synchronize
the NIC startup parameters of the parent process at startup,
it uses all NICs bound by vfio as startup parameters by default,
and an exception occurs in the subsequent hugefile check,
causing the test to fail. Synchronize the NIC startup parameters
of the parent process to the child process to solve this problem.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Kaisen You <kaisenx.you@intel.com>

---
Changes since v1:
- change the patch title to modify the way child
  processes get NIC parameters
---
 app/test/process.h | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/app/test/process.h b/app/test/process.h
index 1f073b9c5c..76a1646b24 100644
--- a/app/test/process.h
+++ b/app/test/process.h
@@ -15,9 +15,12 @@
 #include <string.h> /* strerror */
 #include <unistd.h> /* readlink */
 #include <dirent.h>
+#include "../../drivers/bus/pci/private.h"
 
 #include <rte_string_fns.h> /* strlcpy */
 
+#define MAX_EXTRA_ARGS 32
+#define PCI_PRI_FMT "%.4" PRIx32 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
 #ifdef RTE_EXEC_ENV_FREEBSD
 #define self "curproc"
 #define exe "file"
@@ -33,7 +36,6 @@ extern void *send_pkts(void *empty);
 extern uint16_t flag_for_send_pkts;
 #endif
 #endif
-
 /*
  * launches a second copy of the test process using the given argv parameters,
  * which should include argv[0] as the process name. To identify in the
@@ -44,9 +46,13 @@ static inline int
 process_dup(const char *const argv[], int numargs, const char *env_value)
 {
 	int num;
-	char *argv_cpy[numargs + 1];
-	int i, status;
+	char *argv_cpy[MAX_EXTRA_ARGS];
+	int i, status, s;
 	char path[32];
+	struct rte_pci_device *dev = NULL;
+	char type[MAX_EXTRA_ARGS];
+	char *argv_str[MAX_EXTRA_ARGS];
+	char str_1[] = "-a";
 #ifdef RTE_LIB_PDUMP
 #ifdef RTE_NET_RING
 	pthread_t thread;
@@ -113,10 +119,23 @@ process_dup(const char *const argv[], int numargs, const char *env_value)
 			closedir(dir);
 		}
 #endif
+		s = -1;
+		argv_str[0] = strdup(str_1);
+		FOREACH_DEVICE_ON_PCIBUS(dev) {
+			s = s + 2;
+			sprintf(type, PCI_PRI_FMT, dev->addr.domain,
+			dev->addr.bus, dev->addr.devid, dev->addr.function);
+			argv_str[s - 1] = strdup(str_1);
+			argv_str[s] = strdup(type);
+		}
+		for (i = 0; i < s + 1; i++)
+			argv_cpy[num + i] = strdup(argv_str[i]);
+
 		printf("Running binary with argv[]:");
-		for (i = 0; i < num; i++)
+		for (i = 0; i < num + s + 1; i++)
 			printf("'%s' ", argv_cpy[i]);
 		printf("\n");
+		argv_cpy[numargs + s + 1] = NULL;
 		fflush(stdout);
 
 		/* set the environment variable */
-- 
2.25.1