filestore: fix fallback/slow do_clone_range

We need to seek to the appropriate offsets on the src and destination
fd's for this to do the right thing.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/src/os/FileStore.cc b/src/os/FileStore.cc
index 853ad431f331487a31eea16f270c9da6c816fff1..bb500b2a4f3c8145f55ecba79548640fb4e49ebf 100644 (file)
--- a/src/os/FileStore.cc
+++ b/src/os/FileStore.cc
@@ -2825,6 +2825,9 @@ int FileStore::_do_clone_range(int from, int to, uint64_t off, uint64_t len)
     return -errno;
   }
 
+  ::lseek64(from, off, SEEK_SET);
+  ::lseek64(to, off, SEEK_SET);
+
   loff_t pos = off;
   loff_t end = off + len;
   int buflen = 4096*32;