commit 47c40e2d944c9a29677d0542103207ba8372b66a
author Florin Coras <fcoras@cisco.com> Mon Nov 26 17:01:36 2018 -0800
committer Damjan Marion <dmarion@me.com> Thu Nov 29 11:27:18 2018 +0000
tree e43cf5361213d119df53fb16c15cf0dca550f2d4
parent 743ee3e12531ec3c6ba2e2add694dde3361b0e03

vcl: basic support for apps that fork

- intercept fork and register a new worker with vpp
- share sessions between parent and forked child
- keep binary api state per worker

Change-Id: Ib177517d661724fa042bd2d98d18e777056352a2
Signed-off-by: Florin Coras <fcoras@cisco.com>

src/vcl/ldp.c

diff --git a/src/vcl/ldp.c b/src/vcl/ldp.c
index 5c70643..915d1ca 100644
--- a/src/vcl/ldp.c
+++ b/src/vcl/ldp.c
@@ -346,7 +346,7 @@
 int
 close (int fd)
 {
-  int rv;
+  int rv, refcnt;
   const char *func_str;
   u32 sid = ldp_sid_from_fd (fd);
 
@@ -388,13 +388,15 @@
       LDBG (0, "LDP<%d>: fd %d (0x%x): calling %s(): sid %u (0x%x)",
 	    getpid (), fd, fd, func_str, sid, sid);
 
+      refcnt = vppcom_session_attr (sid, VPPCOM_ATTR_GET_REFCNT, 0, 0);
       rv = vppcom_session_close (sid);
       if (rv != VPPCOM_OK)
 	{
 	  errno = -rv;
 	  rv = -1;
 	}
-      ldp_fd_free_w_sid (sid);
+      if (refcnt == 1)
+	ldp_fd_free_w_sid (sid);
     }
   else
     {