xlator: make 'xlator_api' mandatory

* Remove the options to load old symbol.
* keep only 'xlator_api' symbol from being exported using xlator.sym
* add xlator_api to all the xlators where its missing

NOTE: This covers all the xlators which has at least a test case
to validate its loading. If there is a translator, which doesn't
have any test, then we should probably remove that from codebase.

fixes: #164
Change-Id: Ibcdc8c9844cda6b4463d907a15813745d14c1ebb
Signed-off-by: Amar Tumballi <amarts@redhat.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/xlators/debug/delay-gen/src/delay-gen.c b/xlators/debug/delay-gen/src/delay-gen.c
index a2d02527f23..76efacb3044 100644
--- a/xlators/debug/delay-gen/src/delay-gen.c
+++ b/xlators/debug/delay-gen/src/delay-gen.c
@@ -679,4 +679,19 @@ struct volume_options options[] = {
         .default_value = "",
     },
 
-    {.key = {NULL}}};
+    {.key = {NULL}},
+};
+
+xlator_api_t xlator_api = {
+    .init = init,
+    .fini = fini,
+    .notify = notify,
+    .reconfigure = reconfigure,
+    .mem_acct_init = mem_acct_init,
+    .op_version = {GD_OP_VERSION_3_12_0},
+    .fops = &fops,
+    .cbks = &cbks,
+    .options = options,
+    .identifier = "delay-gen",
+    .category = GF_TECH_PREVIEW,
+};