[PATCH v3 4/8] eal: add support for no-shconf in hugepage data file

[Anatoly Burakov <anatoly.burakov@intel.com>]

Do not create a shared hugepage data file if we were asked to
not create any shared files.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---

Notes:
    RFC->v1:
    - Use --no-shconf only

 lib/librte_eal/linuxapp/eal/eal_memory.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5d3c8831b..ddfa8b133 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -521,7 +521,18 @@ static void *
 create_shared_memory(const char *filename, const size_t mem_size)
 {
 	void *retval;
-	int fd = open(filename, O_CREAT | O_RDWR, 0666);
+	int fd;
+
+	/* if no shared files mode is used, create anonymous memory instead */
+	if (internal_config.no_shconf) {
+		retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE,
+				MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+		if (retval == MAP_FAILED)
+			return NULL;
+		return retval;
+	}
+
+	fd = open(filename, O_CREAT | O_RDWR, 0666);
 	if (fd < 0)
 		return NULL;
 	if (ftruncate(fd, mem_size) < 0) {
-- 
2.17.1