Enable shared-VM namespace support

Required prep work for gracefully supporting
"... dpdk { proc-type secondary }" -  multiple processes sharing a physical
host, VM, container, etc.

Change-Id: Ic3eb72f4093e26d7c86dde3b8799264f1d0c218b
Signed-off-by: Dave Barach <dave@barachs.net>

2 files changed, 12 insertions, 11 deletions

diff --git a/vlib-api/vlibmemory/memory_shared.c b/vlib-api/vlibmemory/memory_shared.c
index de1eafdad80..ecd5cff7339 100644
--- a/vlib-api/vlibmemory/memory_shared.c
+++ b/vlib-api/vlibmemory/memory_shared.c
@@ -192,6 +192,13 @@ static void vl_msg_api_free_nolock (void *a)
     svm_pop_heap (oldheap);
 }
 
+void vl_set_memory_root_path (char *name)
+{
+    api_main_t *am = &api_main;
+
+    am->root_path = name;
+}
+
 int vl_map_shmem (char *region_name, int is_vlib)
 {
     svm_map_region_args_t *a = 0;
@@ -203,7 +210,7 @@ int vl_map_shmem (char *region_name, int is_vlib)
     struct timespec ts, tsrem;
 
     if (is_vlib == 0)
-        svm_region_init();
+        svm_region_init_chroot(am->root_path);
 
     vec_validate (a, 0);
 
diff --git a/vlib-api/vlibmemory/memory_vlib.c b/vlib-api/vlibmemory/memory_vlib.c
index 57cb8f74012..7ba76ec49d1 100644
--- a/vlib-api/vlibmemory/memory_vlib.c
+++ b/vlib-api/vlibmemory/memory_vlib.c
@@ -1046,9 +1046,10 @@ VLIB_CLI_COMMAND (trace, static) = {
 clib_error_t *
 vlibmemory_init (vlib_main_t * vm)
 {
-    /* Do this early, to avoid glibc malloc fubar */
-    svm_region_init();
-    return 0;
+  api_main_t *am = &api_main;
+  /* Normally NULL, can be set by cmd line "chroot {prefix foo}" */
+  svm_region_init_chroot (am->root_path);
+  return 0;
 }
 
 VLIB_INIT_FUNCTION (vlibmemory_init);
@@ -1060,13 +1061,6 @@ void vl_set_memory_region_name (char *name)
     am->region_name = name;
 }
 
-void vl_set_memory_root_path (char *name)
-{
-    api_main_t *am = &api_main;
-
-    am->root_path = name;
-}
-
 static int range_compare (vl_api_msg_range_t * a0, vl_api_msg_range_t * a1)
 {
     int len0, len1, clen;