client: add debug output for ll_read result

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
(cherry picked from commit 30dd9d2834b561ab7b0b4785e8e45094098725ae)

diff --git a/src/client/Client.cc b/src/client/Client.cc
index ae6385c47c94b1c1e20f5e14f379e6a3ef52927a..5df9abbc150215af72e136743532d23e85ea8536 100644 (file)
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -13384,7 +13384,10 @@ int Client::ll_read(Fh *fh, loff_t off, loff_t len, bufferlist *bl)
 
   /* We can't return bytes written larger than INT_MAX, clamp len to that */
   len = std::min(len, (loff_t)INT_MAX);
-  return _read(fh, off, len, bl);
+  int r = _read(fh, off, len, bl);
+  ldout(cct, 3) << "ll_read " << fh << " " << off << "~" << len << " = " << r
+               << dendl;
+  return r;
 }
 
 int Client::ll_read_block(Inode *in, uint64_t blockid,