commit 37e7498fc0114b118cb410eaafab4335348c3ded
author Akilesh Kailash <akailash@google.com> Wed Nov 29 20:37:55 2023 +0000
committer Gerrit Code Review <noreply-gerritcodereview@google.com> Wed Nov 29 20:37:55 2023 +0000
tree aa1972a4150840560530a99e912515ee1cf7baa8
parent 54702a79f92f66541613e7f3a58844296a790daa
parent b78d0e2856c5401d77839f95d9ae7d829abfa010

Merge "snapshotctl: fsync after writing every 1MB buffer" into main

fs_mgr/libsnapshot/snapshotctl.cpp

diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index ebaca2d..0396a55 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -227,8 +227,12 @@
         if (file_offset >= dev_sz) {
             break;
         }
+
+        if (fsync(cfd.get()) < 0) {
+            PLOG(ERROR) << "Fsync failed at offset: " << file_offset << " size: " << to_read;
+            return false;
+        }
     }
-    fsync(cfd.get());
     return true;
 }