[PATCH v3] app/test: secondary process passes allow parameters

[Mingjin Ye <mingjinx.ye@intel.com>]

In EAL related test cases, the allow parameters are not passed to
the secondary process, resulting in unexpected NICs being loaded.

This patch fixes this issue by appending the allow parameters to
the secondary process.

Fixes: 086eb64db39e ("test/pdump: add unit test for pdump library")
Fixes: 148f963fb532 ("xen: core library changes")
Fixes: af75078fece3 ("first public release")
Fixes: b8d5e544e73e ("test: add procfs error message for multi-process launch")
Cc: stable@dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
v3:new solution.
---
 app/test/process.h | 52 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 50 insertions(+), 2 deletions(-)

diff --git a/app/test/process.h b/app/test/process.h
index 1f073b9c5c..57d58309d8 100644
--- a/app/test/process.h
+++ b/app/test/process.h
@@ -18,6 +18,8 @@
 
 #include <rte_string_fns.h> /* strlcpy */
 
+#include <rte_devargs.h>
+
 #ifdef RTE_EXEC_ENV_FREEBSD
 #define self "curproc"
 #define exe "file"
@@ -34,6 +36,44 @@ extern uint16_t flag_for_send_pkts;
 #endif
 #endif
 
+#define PREFIX_A "-a"
+
+static int
+add_parameter_a(char **argv, int max_capacity)
+{
+	struct rte_devargs *devargs;
+	int count = 0;
+	int name_length, data_length;
+	char *dev;
+	int malloc_szie;
+
+	RTE_EAL_DEVARGS_FOREACH(NULL, devargs) {
+		if (count >= max_capacity)
+			return count;
+
+		name_length = strlen(devargs->name);
+		if (devargs->data != NULL)
+			data_length = strlen(devargs->data);
+		else
+			data_length = 0;
+
+		malloc_szie = name_length + data_length + 1;
+		dev = malloc(malloc_szie);
+
+		strncpy(dev, devargs->name, name_length);
+		if (data_length > 0)
+			strncpy(dev + name_length, devargs->data, data_length);
+		memset(dev + malloc_szie - 1, 0, 1);
+
+		*(argv + count) =  strdup(PREFIX_A);
+		count++;
+
+		*(argv + count) = dev;
+		count++;
+	}
+	return count;
+}
+
 /*
  * 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
@@ -44,7 +84,7 @@ static inline int
 process_dup(const char *const argv[], int numargs, const char *env_value)
 {
 	int num;
-	char *argv_cpy[numargs + 1];
+	char *argv_cpy[numargs + RTE_MAX_ETHPORTS * 2 + 1];
 	int i, status;
 	char path[32];
 #ifdef RTE_LIB_PDUMP
@@ -58,11 +98,12 @@ process_dup(const char *const argv[], int numargs, const char *env_value)
 	if (pid < 0)
 		return -1;
 	else if (pid == 0) {
+		memset(argv_cpy, 0, numargs + RTE_MAX_ETHPORTS * 2 + 1);
 		/* make a copy of the arguments to be passed to exec */
 		for (i = 0; i < numargs; i++)
 			argv_cpy[i] = strdup(argv[i]);
-		argv_cpy[i] = NULL;
 		num = numargs;
+		num += add_parameter_a(&argv_cpy[i], RTE_MAX_ETHPORTS * 2);
 
 #ifdef RTE_EXEC_ENV_LINUX
 		{
@@ -131,6 +172,13 @@ process_dup(const char *const argv[], int numargs, const char *env_value)
 			}
 			rte_panic("Cannot exec: %s\n", strerror(errno));
 		}
+
+		for (i = 0; i < num; i++) {
+			if (argv_cpy[i] != NULL) {
+				free(argv_cpy[i]);
+				argv_cpy[i] = NULL;
+			}
+		}
 	}
 	/* parent process does a wait */
 #ifdef RTE_LIB_PDUMP
-- 
2.25.1