seastore: utilize errorator as a return type of discard()

Signed-off-by: Jinyong Ha <jy200.ha@samsung.com>

diff --git a/src/crimson/os/seastore/nvmedevice/nvmedevice.h b/src/crimson/os/seastore/nvmedevice/nvmedevice.h
index c13ec796fc75f43ef9fe9fad5b359eb945837d94..87ff56272d341dd4bc5e5d754c3aa78c46c14ae4 100644 (file)
--- a/src/crimson/os/seastore/nvmedevice/nvmedevice.h
+++ b/src/crimson/os/seastore/nvmedevice/nvmedevice.h
@@ -125,6 +125,9 @@ using open_ertr = crimson::errorator<
 using nvme_command_ertr = crimson::errorator<
   crimson::ct_error::input_output_error>;
 
+using discard_ertr = crimson::errorator<
+  crimson::ct_error::input_output_error>;
+
 struct io_context_t {
   iocb cb;
   bool done = false;
@@ -194,7 +197,9 @@ public:
     uint16_t stream = 0) = 0;
 
   // TODO
-  virtual int discard(uint64_t offset, uint64_t len) { return 0; }
+  virtual discard_ertr::future<> discard(
+    uint64_t offset,
+    uint64_t len) { return seastar::now(); }
 
   virtual open_ertr::future<> open(
       const std::string& path,