hashserv: Implement read-only version of "report" RPC

When the hash equivalence server is in read-only mode, it should still
return a unihash for a given "report" call if there is one.

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 26 insertions, 3 deletions

diff --git a/lib/hashserv/server.py b/lib/hashserv/server.py
index 84cf4f228..c691df761 100644
--- a/lib/hashserv/server.py
+++ b/lib/hashserv/server.py
@@ -124,6 +124,7 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
         self.max_chunk = bb.asyncrpc.DEFAULT_MAX_CHUNK
         self.backfill_queue = backfill_queue
         self.upstream = upstream
+        self.read_only = read_only
 
         self.handlers.update(
             {
@@ -131,13 +132,15 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
                 "get-outhash": self.handle_get_outhash,
                 "get-stream": self.handle_get_stream,
                 "get-stats": self.handle_get_stats,
+                # Not always read-only, but internally checks if the server is
+                # read-only
+                "report": self.handle_report,
             }
         )
 
         if not read_only:
             self.handlers.update(
                 {
-                    "report": self.handle_report,
                     "report-equiv": self.handle_equivreport,
                     "reset-stats": self.handle_reset_stats,
                     "backfill-wait": self.handle_backfill_wait,
@@ -284,7 +287,27 @@ class ServerClient(bb.asyncrpc.AsyncServerConnection):
         await self.socket.send("ok")
         return self.NO_RESPONSE
 
+    async def report_readonly(self, data):
+        method = data["method"]
+        outhash = data["outhash"]
+        taskhash = data["taskhash"]
+
+        info = await self.get_outhash(method, outhash, taskhash)
+        if info:
+            unihash = info["unihash"]
+        else:
+            unihash = data["unihash"]
+
+        return {
+            "taskhash": taskhash,
+            "method": method,
+            "unihash": unihash,
+        }
+
     async def handle_report(self, data):
+        if self.read_only:
+            return await self.report_readonly(data)
+
         outhash_data = {
             "method": data["method"],
             "outhash": data["outhash"],
diff --git a/lib/hashserv/tests.py b/lib/hashserv/tests.py
index 268b27006..e9a361dc4 100644
--- a/lib/hashserv/tests.py
+++ b/lib/hashserv/tests.py
@@ -387,8 +387,8 @@ class HashEquivalenceCommonTests(object):
         outhash2 = '3c979c3db45c569f51ab7626a4651074be3a9d11a84b1db076f5b14f7d39db44'
         unihash2 = '90e9bc1d1f094c51824adca7f8ea79a048d68824'
 
-        with self.assertRaises(ConnectionError):
-            ro_client.report_unihash(taskhash2, self.METHOD, outhash2, unihash2)
+        result = ro_client.report_unihash(taskhash2, self.METHOD, outhash2, unihash2)
+        self.assertEqual(result['unihash'], unihash2)
 
         # Ensure that the database was not modified
         self.assertClientGetHash(rw_client, taskhash2, None)