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>

4 files changed, 58 insertions, 2 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,
+};
diff --git a/xlators/debug/error-gen/src/error-gen.c b/xlators/debug/error-gen/src/error-gen.c
index 3d271b2ef21..3416d63fa20 100644
--- a/xlators/debug/error-gen/src/error-gen.c
+++ b/xlators/debug/error-gen/src/error-gen.c
@@ -1644,4 +1644,19 @@ struct volume_options options[] = {
         .flags = OPT_FLAG_SETTABLE,
     },
 
-    {.key = {NULL}}};
+    {.key = {NULL}},
+};
+
+xlator_api_t xlator_api = {
+    .init = init,
+    .fini = fini,
+    .reconfigure = reconfigure,
+    .mem_acct_init = mem_acct_init,
+    .op_version = {1},
+    .dumpops = &dumpops,
+    .fops = &fops,
+    .cbks = &cbks,
+    .options = options,
+    .identifier = "error-gen",
+    .category = GF_TECH_PREVIEW,
+};
diff --git a/xlators/debug/sink/src/sink.c b/xlators/debug/sink/src/sink.c
index 965efd811ae..9822bbb732e 100644
--- a/xlators/debug/sink/src/sink.c
+++ b/xlators/debug/sink/src/sink.c
@@ -80,3 +80,15 @@ struct xlator_cbks cbks = {};
 struct volume_options options[] = {
     {.key = {NULL}},
 };
+
+xlator_api_t xlator_api = {
+    .init = init,
+    .fini = fini,
+    .notify = notify,
+    .op_version = {GD_OP_VERSION_3_12_0},
+    .fops = &fops,
+    .cbks = &cbks,
+    .options = options,
+    .identifier = "sink",
+    .category = GF_TECH_PREVIEW,
+};
diff --git a/xlators/debug/trace/src/trace.c b/xlators/debug/trace/src/trace.c
index 0aca3a9a5bb..3db2e263524 100644
--- a/xlators/debug/trace/src/trace.c
+++ b/xlators/debug/trace/src/trace.c
@@ -3520,3 +3520,17 @@ struct volume_options options[] = {
 };
 
 struct xlator_dumpops dumpops = {.history = trace_dump_history};
+
+xlator_api_t xlator_api = {
+    .init = init,
+    .fini = fini,
+    .reconfigure = reconfigure,
+    .mem_acct_init = mem_acct_init,
+    .op_version = {1},
+    .dumpops = &dumpops,
+    .fops = &fops,
+    .cbks = &cbks,
+    .options = options,
+    .identifier = "trace",
+    .category = GF_TECH_PREVIEW,
+};