crimson/os/seastore: remove multistream related codes

Current codes allow the device to allocate multiple namespace without specific policy
if the nvme device report that it is capable of mutistream functionality.
So, this commit removes the multistream related code, leaving it as a TODO.

Signed-off-by: Myoungwon Oh <myoungwon.oh@samsung.com>
(cherry picked from commit cc5b4a25155dea919b5a939063370b4f13a992ec)

diff --git a/src/crimson/os/seastore/random_block_manager/nvme_block_device.cc b/src/crimson/os/seastore/random_block_manager/nvme_block_device.cc
index 2576ee7466b9b8adcde9176610b96794d1600ffb..039f573f41d3f7a2f3c04fc9acc182d5d656d468 100644 (file)
--- a/src/crimson/os/seastore/random_block_manager/nvme_block_device.cc
+++ b/src/crimson/os/seastore/random_block_manager/nvme_block_device.cc
@@ -42,10 +42,7 @@ open_ertr::future<> NVMeBlockDevice::open(
         // Do identify_controller first, and then identify_namespace.
         return identify_controller(device).safe_then([this, in_path, mode](
           auto id_controller_data) {
-          support_multistream = id_controller_data.oacs.support_directives;
-          if (support_multistream) {
-            stream_id_count = WRITE_LIFE_MAX;
-          }
+         // TODO: enable multi-stream if the nvme device supports
           awupf = id_controller_data.awupf + 1;
           return identify_namespace(device).safe_then([this, in_path, mode] (
             auto id_namespace_data) {
@@ -75,12 +72,7 @@ open_ertr::future<> NVMeBlockDevice::open_for_io(
       auto file) {
       assert(io_device.size() > stream_index_to_open);
       io_device[stream_index_to_open] = std::move(file);
-      return io_device[stream_index_to_open].fcntl(
-        F_SET_FILE_RW_HINT,
-        (uintptr_t)&stream_index_to_open).then([this](auto ret) {
-        stream_index_to_open++;
-        return seastar::now();
-      });
+      return seastar::now();
     });
   });
 }