mds: check return values in dumper

Signed-off-by: Sage Weil <sage.weil@dreamhost.com>

diff --git a/src/mds/Dumper.cc b/src/mds/Dumper.cc
index 069f73fcf985f23ac9af477de47aaf41ac5b4cec..15e0e773e944414ba2ac689ed414f9aa6adfbffc 100644 (file)
--- a/src/mds/Dumper.cc
+++ b/src/mds/Dumper.cc
@@ -113,7 +113,8 @@ void Dumper::dump(const char *dump_file)
            (unsigned long long)start, (unsigned long long)start,
            (unsigned long long)bl.length(), (unsigned long long)bl.length(),
            4);
-    ::write(fd, buf, sizeof(buf));
+    int r = ::write(fd, buf, sizeof(buf));
+    assert(r >= 0);
 
     // write the data
     ::lseek64(fd, start, SEEK_SET);