[PATCH] eal/linux: redefine the name for rte_fbarray_init()

[Congjie Zhou]

add the current time into the name

Signed-off-by: Congjie Zhou <zcjie0802 at qq.com>
---

When multiple secondary processes run in different containers, names
identified by PIDs are not unique due to the pid namespace.
Add current time to redefine a unique name.

 lib/eal/linux/eal_memalloc.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/lib/eal/linux/eal_memalloc.c b/lib/eal/linux/eal_memalloc.c
index e354efc..3fae534 100644
--- a/lib/eal/linux/eal_memalloc.c
+++ b/lib/eal/linux/eal_memalloc.c
@@ -16,6 +16,7 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <setjmp.h>
+#include <inttypes.h>
 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */
 #include <linux/memfd.h>
 #define MEMFD_SUPPORTED
@@ -1430,6 +1431,18 @@ eal_memalloc_sync_with_primary(void)
 	return 0;
 }
 
+static uint64_t
+current_time(void)
+{
+	struct timespec ts;
+	if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) == -1) {
+		EAL_LOG(ERR, "Fail to get current time");
+		return -1ULL;
+	}
+	uint64_t time_ns = (uint64_t)ts.tv_sec * 1000000000ULL + ts.tv_nsec;
+	return time_ns;
+}
+
 static int
 secondary_msl_create_walk(const struct rte_memseg_list *msl,
 		void *arg __rte_unused)
@@ -1447,8 +1460,8 @@ secondary_msl_create_walk(const struct rte_memseg_list *msl,
 	local_msl = &local_memsegs[msl_idx];
 
 	/* create distinct fbarrays for each secondary */
-	snprintf(name, RTE_FBARRAY_NAME_LEN, "%s_%i",
-		primary_msl->memseg_arr.name, getpid());
+	snprintf(name, RTE_FBARRAY_NAME_LEN, "%s_%i_%"PRIx64,
+		primary_msl->memseg_arr.name, getpid(), current_time());
 
 	ret = rte_fbarray_init(&local_msl->memseg_arr, name,
 		primary_msl->memseg_arr.len,
-- 
2.34.1